Resguardo inicial

linux-7.2.3/fs/orangefs/Kconfig

@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0-only
+config ORANGEFS_FS
+	tristate "ORANGEFS (Powered by PVFS) support"
+	select FS_POSIX_ACL
+	help
+	   Orange is a parallel file system designed for use on high end
+	   computing (HEC) systems.

linux-7.2.3/fs/orangefs/Makefile

@@ -0,0 +1,11 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for the ORANGEFS filesystem.
+#
+
+obj-$(CONFIG_ORANGEFS_FS) += orangefs.o
+
+orangefs-objs := acl.o file.o orangefs-cache.o orangefs-utils.o xattr.o \
+		 dcache.o inode.o orangefs-sysfs.o orangefs-mod.o super.o \
+		 devorangefs-req.o namei.o symlink.o dir.o orangefs-bufmap.o \
+		 orangefs-debugfs.o waitqueue.o

linux-7.2.3/fs/orangefs/acl.c

@@ -0,0 +1,153 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ *
+ * See COPYING in top-level directory.
+ */
+
+#include "protocol.h"
+#include "orangefs-kernel.h"
+#include "orangefs-bufmap.h"
+#include <linux/posix_acl_xattr.h>
+
+struct posix_acl *orangefs_get_acl(struct inode *inode, int type, bool rcu)
+{
+	struct posix_acl *acl;
+	int ret;
+	char *key = NULL, *value = NULL;
+
+	if (rcu)
+		return ERR_PTR(-ECHILD);
+
+	switch (type) {
+	case ACL_TYPE_ACCESS:
+		key = XATTR_NAME_POSIX_ACL_ACCESS;
+		break;
+	case ACL_TYPE_DEFAULT:
+		key = XATTR_NAME_POSIX_ACL_DEFAULT;
+		break;
+	default:
+		gossip_err("orangefs_get_acl: bogus value of type %d\n", type);
+		return ERR_PTR(-EINVAL);
+	}
+	/*
+	 * Rather than incurring a network call just to determine the exact
+	 * length of the attribute, I just allocate a max length to save on
+	 * the network call. Conceivably, we could pass NULL to
+	 * orangefs_inode_getxattr() to probe the length of the value, but
+	 * I don't do that for now.
+	 */
+	value = kmalloc(ORANGEFS_MAX_XATTR_VALUELEN, GFP_KERNEL);
+	if (!value)
+		return ERR_PTR(-ENOMEM);
+
+	gossip_debug(GOSSIP_ACL_DEBUG,
+		     "inode %pU, key %s, type %d\n",
+		     get_khandle_from_ino(inode),
+		     key,
+		     type);
+	ret = orangefs_inode_getxattr(inode, key, value,
+				      ORANGEFS_MAX_XATTR_VALUELEN);
+	/* if the key exists, convert it to an in-memory rep */
+	if (ret > 0) {
+		acl = posix_acl_from_xattr(&init_user_ns, value, ret);
+	} else if (ret == -ENODATA || ret == -ENOSYS) {
+		acl = NULL;
+	} else {
+		gossip_err("inode %pU retrieving acl's failed with error %d\n",
+			   get_khandle_from_ino(inode),
+			   ret);
+		acl = ERR_PTR(ret);
+	}
+	/* kfree(NULL) is safe, so don't worry if value ever got used */
+	kfree(value);
+	return acl;
+}
+
+int __orangefs_set_acl(struct inode *inode, struct posix_acl *acl, int type)
+{
+	int error = 0;
+	void *value = NULL;
+	size_t size = 0;
+	const char *name = NULL;
+
+	switch (type) {
+	case ACL_TYPE_ACCESS:
+		name = XATTR_NAME_POSIX_ACL_ACCESS;
+		break;
+	case ACL_TYPE_DEFAULT:
+		name = XATTR_NAME_POSIX_ACL_DEFAULT;
+		break;
+	default:
+		gossip_err("%s: invalid type %d!\n", __func__, type);
+		return -EINVAL;
+	}
+
+	gossip_debug(GOSSIP_ACL_DEBUG,
+		     "%s: inode %pU, key %s type %d\n",
+		     __func__, get_khandle_from_ino(inode),
+		     name,
+		     type);
+
+	if (acl) {
+		value = posix_acl_to_xattr(&init_user_ns, acl, &size, GFP_KERNEL);
+		if (!value)
+			return -ENOMEM;
+	}
+
+	gossip_debug(GOSSIP_ACL_DEBUG,
+		     "%s: name %s, value %p, size %zd, acl %p\n",
+		     __func__, name, value, size, acl);
+	/*
+	 * Go ahead and set the extended attribute now. NOTE: Suppose acl
+	 * was NULL, then value will be NULL and size will be 0 and that
+	 * will xlate to a removexattr. However, we don't want removexattr
+	 * complain if attributes does not exist.
+	 */
+	error = orangefs_inode_setxattr(inode, name, value, size, 0);
+
+	kfree(value);
+	if (!error)
+		set_cached_acl(inode, type, acl);
+	return error;
+}
+
+int orangefs_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
+		     struct posix_acl *acl, int type)
+{
+	int error;
+	struct iattr iattr;
+	int rc;
+	struct inode *inode = d_inode(dentry);
+
+	memset(&iattr, 0, sizeof iattr);
+
+	if (type == ACL_TYPE_ACCESS && acl) {
+		/*
+		 * posix_acl_update_mode checks to see if the permissions
+		 * described by the ACL can be encoded into the
+		 * object's mode. If so, it sets "acl" to NULL
+		 * and "mode" to the new desired value. It is up to
+		 * us to propagate the new mode back to the server...
+		 */
+		error = posix_acl_update_mode(&nop_mnt_idmap, inode,
+					      &iattr.ia_mode, &acl);
+		if (error) {
+			gossip_err("%s: posix_acl_update_mode err: %d\n",
+				   __func__,
+				   error);
+			return error;
+		}
+
+		if (inode->i_mode != iattr.ia_mode)
+			iattr.ia_valid = ATTR_MODE;
+
+	}
+
+	rc = __orangefs_set_acl(inode, acl, type);
+
+	if (!rc && (iattr.ia_valid == ATTR_MODE))
+		rc = __orangefs_setattr_mode(dentry, &iattr);
+
+	return rc;
+}

linux-7.2.3/fs/orangefs/dcache.c

@@ -0,0 +1,139 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ *
+ * See COPYING in top-level directory.
+ */
+
+/*
+ *  Implementation of dentry (directory cache) functions.
+ */
+
+#include "protocol.h"
+#include "orangefs-kernel.h"
+
+/* Returns 1 if dentry can still be trusted, else 0. */
+static int orangefs_revalidate_lookup(struct inode *parent_inode, const struct qstr *name,
+				      struct dentry *dentry)
+{
+	struct orangefs_inode_s *parent = ORANGEFS_I(parent_inode);
+	struct inode *inode = dentry->d_inode;
+	struct orangefs_kernel_op_s *new_op;
+	int ret = 0;
+	int err = 0;
+
+	gossip_debug(GOSSIP_DCACHE_DEBUG, "%s: attempting lookup.\n", __func__);
+
+	new_op = op_alloc(ORANGEFS_VFS_OP_LOOKUP);
+	if (!new_op)
+		return -ENOMEM;
+
+	new_op->upcall.req.lookup.sym_follow = ORANGEFS_LOOKUP_LINK_NO_FOLLOW;
+	new_op->upcall.req.lookup.parent_refn = parent->refn;
+	/* op_alloc() leaves ->upcall zeroed */
+	memcpy(new_op->upcall.req.lookup.d_name, name->name,
+			min(name->len, ORANGEFS_NAME_MAX - 1));
+
+	gossip_debug(GOSSIP_DCACHE_DEBUG,
+		     "%s:%s:%d interrupt flag [%d]\n",
+		     __FILE__,
+		     __func__,
+		     __LINE__,
+		     get_interruptible_flag(parent_inode));
+
+	err = service_operation(new_op, "orangefs_lookup",
+			get_interruptible_flag(parent_inode));
+
+	/* Positive dentry: reject if error or not the same inode. */
+	if (inode) {
+		if (err) {
+			gossip_debug(GOSSIP_DCACHE_DEBUG,
+			    "%s:%s:%d lookup failure.\n",
+			    __FILE__, __func__, __LINE__);
+			goto out_drop;
+		}
+		if (!match_handle(new_op->downcall.resp.lookup.refn.khandle,
+		    inode)) {
+			gossip_debug(GOSSIP_DCACHE_DEBUG,
+			    "%s:%s:%d no match.\n",
+			    __FILE__, __func__, __LINE__);
+			goto out_drop;
+		}
+
+	/* Negative dentry: reject if success or error other than ENOENT. */
+	} else {
+		gossip_debug(GOSSIP_DCACHE_DEBUG, "%s: negative dentry.\n",
+		    __func__);
+		if (!err || err != -ENOENT) {
+			if (new_op->downcall.status != 0)
+				gossip_debug(GOSSIP_DCACHE_DEBUG,
+				    "%s:%s:%d lookup failure.\n",
+				    __FILE__, __func__, __LINE__);
+			goto out_drop;
+		}
+	}
+
+	orangefs_set_timeout(dentry);
+	ret = 1;
+out_release_op:
+	op_release(new_op);
+	return ret;
+out_drop:
+	gossip_debug(GOSSIP_DCACHE_DEBUG, "%s:%s:%d revalidate failed\n",
+	    __FILE__, __func__, __LINE__);
+	goto out_release_op;
+}
+
+/*
+ * Verify that dentry is valid.
+ *
+ * Should return 1 if dentry can still be trusted, else 0.
+ */
+static int orangefs_d_revalidate(struct inode *dir, const struct qstr *name,
+				 struct dentry *dentry, unsigned int flags)
+{
+	int ret;
+	unsigned long time = (unsigned long) dentry->d_fsdata;
+
+	if (time_before(jiffies, time))
+		return 1;
+
+	if (flags & LOOKUP_RCU)
+		return -ECHILD;
+
+	gossip_debug(GOSSIP_DCACHE_DEBUG, "%s: called on dentry %p.\n",
+		     __func__, dentry);
+
+	/* skip root handle lookups. */
+	if (dentry->d_inode && is_root_handle(dentry->d_inode))
+		return 1;
+
+	/*
+	 * If this passes, the positive dentry still exists or the negative
+	 * dentry still does not exist.
+	 */
+	if (!orangefs_revalidate_lookup(dir, name, dentry))
+		return 0;
+
+	/* We do not need to continue with negative dentries. */
+	if (!dentry->d_inode) {
+		gossip_debug(GOSSIP_DCACHE_DEBUG,
+		    "%s: negative dentry or positive dentry and inode valid.\n",
+		    __func__);
+		return 1;
+	}
+
+	/* Now we must perform a getattr to validate the inode contents. */
+
+	ret = orangefs_inode_check_changed(dentry->d_inode);
+	if (ret < 0) {
+		gossip_debug(GOSSIP_DCACHE_DEBUG, "%s:%s:%d getattr failure.\n",
+		    __FILE__, __func__, __LINE__);
+		return 0;
+	}
+	return !ret;
+}
+
+const struct dentry_operations orangefs_dentry_operations = {
+	.d_revalidate = orangefs_d_revalidate,
+};

linux-7.2.3/fs/orangefs/devorangefs-req.c

@@ -0,0 +1,814 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ *
+ * Changes by Acxiom Corporation to add protocol version to kernel
+ * communication, Copyright Acxiom Corporation, 2005.
+ *
+ * See COPYING in top-level directory.
+ */
+
+#include "protocol.h"
+#include "orangefs-kernel.h"
+#include "orangefs-dev-proto.h"
+#include "orangefs-bufmap.h"
+#include "orangefs-debugfs.h"
+
+#include <linux/debugfs.h>
+#include <linux/slab.h>
+
+/* this file implements the /dev/pvfs2-req device node */
+
+uint32_t orangefs_userspace_version;
+
+static int open_access_count;
+
+static DEFINE_MUTEX(devreq_mutex);
+
+#define DUMP_DEVICE_ERROR()                                                   \
+do {                                                                          \
+	gossip_err("*****************************************************\n");\
+	gossip_err("ORANGEFS Device Error:  You cannot open the device file ");  \
+	gossip_err("\n/dev/%s more than once.  Please make sure that\nthere " \
+		   "are no ", ORANGEFS_REQDEVICE_NAME);                          \
+	gossip_err("instances of a program using this device\ncurrently "     \
+		   "running. (You must verify this!)\n");                     \
+	gossip_err("For example, you can use the lsof program as follows:\n");\
+	gossip_err("'lsof | grep %s' (run this as root)\n",                   \
+		   ORANGEFS_REQDEVICE_NAME);                                     \
+	gossip_err("  open_access_count = %d\n", open_access_count);          \
+	gossip_err("*****************************************************\n");\
+} while (0)
+
+static int hash_func(__u64 tag, int table_size)
+{
+	return do_div(tag, (unsigned int)table_size);
+}
+
+static void orangefs_devreq_add_op(struct orangefs_kernel_op_s *op)
+{
+	int index = hash_func(op->tag, hash_table_size);
+
+	list_add_tail(&op->list, &orangefs_htable_ops_in_progress[index]);
+}
+
+/*
+ * find the op with this tag and remove it from the in progress
+ * hash table.
+ */
+static struct orangefs_kernel_op_s *orangefs_devreq_remove_op(__u64 tag)
+{
+	struct orangefs_kernel_op_s *op, *next;
+	int index;
+
+	index = hash_func(tag, hash_table_size);
+
+	spin_lock(&orangefs_htable_ops_in_progress_lock);
+	list_for_each_entry_safe(op,
+				 next,
+				 &orangefs_htable_ops_in_progress[index],
+				 list) {
+		if (op->tag == tag && !op_state_purged(op) &&
+		    !op_state_given_up(op)) {
+			list_del_init(&op->list);
+			spin_unlock(&orangefs_htable_ops_in_progress_lock);
+			return op;
+		}
+	}
+
+	spin_unlock(&orangefs_htable_ops_in_progress_lock);
+	return NULL;
+}
+
+/* Returns whether any FS are still pending remounted */
+static int mark_all_pending_mounts(void)
+{
+	int unmounted = 1;
+	struct orangefs_sb_info_s *orangefs_sb = NULL;
+
+	spin_lock(&orangefs_superblocks_lock);
+	list_for_each_entry(orangefs_sb, &orangefs_superblocks, list) {
+		/* All of these file system require a remount */
+		orangefs_sb->mount_pending = 1;
+		unmounted = 0;
+	}
+	spin_unlock(&orangefs_superblocks_lock);
+	return unmounted;
+}
+
+/*
+ * Determine if a given file system needs to be remounted or not
+ *  Returns -1 on error
+ *           0 if already mounted
+ *           1 if needs remount
+ */
+static int fs_mount_pending(__s32 fsid)
+{
+	int mount_pending = -1;
+	struct orangefs_sb_info_s *orangefs_sb = NULL;
+
+	spin_lock(&orangefs_superblocks_lock);
+	list_for_each_entry(orangefs_sb, &orangefs_superblocks, list) {
+		if (orangefs_sb->fs_id == fsid) {
+			mount_pending = orangefs_sb->mount_pending;
+			break;
+		}
+	}
+	spin_unlock(&orangefs_superblocks_lock);
+	return mount_pending;
+}
+
+static int orangefs_devreq_open(struct inode *inode, struct file *file)
+{
+	int ret = -EINVAL;
+
+	/* in order to ensure that the filesystem driver sees correct UIDs */
+	if (file->f_cred->user_ns != &init_user_ns) {
+		gossip_err("%s: device cannot be opened outside init_user_ns\n",
+			   __func__);
+		goto out;
+	}
+
+	if (!(file->f_flags & O_NONBLOCK)) {
+		gossip_err("%s: device cannot be opened in blocking mode\n",
+			   __func__);
+		goto out;
+	}
+	ret = -EACCES;
+	gossip_debug(GOSSIP_DEV_DEBUG, "client-core: opening device\n");
+	mutex_lock(&devreq_mutex);
+
+	if (open_access_count == 0) {
+		open_access_count = 1;
+		ret = 0;
+	} else {
+		DUMP_DEVICE_ERROR();
+	}
+	mutex_unlock(&devreq_mutex);
+
+out:
+
+	gossip_debug(GOSSIP_DEV_DEBUG,
+		     "pvfs2-client-core: open device complete (ret = %d)\n",
+		     ret);
+	return ret;
+}
+
+/* Function for read() callers into the device */
+static ssize_t orangefs_devreq_read(struct file *file,
+				 char __user *buf,
+				 size_t count, loff_t *offset)
+{
+	struct orangefs_kernel_op_s *op, *temp;
+	__s32 proto_ver = ORANGEFS_KERNEL_PROTO_VERSION;
+	static __s32 magic = ORANGEFS_DEVREQ_MAGIC;
+	struct orangefs_kernel_op_s *cur_op;
+	unsigned long ret;
+
+	/* We do not support blocking IO. */
+	if (!(file->f_flags & O_NONBLOCK)) {
+		gossip_err("%s: blocking read from client-core.\n",
+			   __func__);
+		return -EINVAL;
+	}
+
+	/*
+	 * The client will do an ioctl to find MAX_DEV_REQ_UPSIZE, then
+	 * always read with that size buffer.
+	 */
+	if (count != MAX_DEV_REQ_UPSIZE) {
+		gossip_err("orangefs: client-core tried to read wrong size\n");
+		return -EINVAL;
+	}
+
+	/* Check for an empty list before locking. */
+	if (list_empty(&orangefs_request_list))
+		return -EAGAIN;
+
+restart:
+	cur_op = NULL;
+	/* Get next op (if any) from top of list. */
+	spin_lock(&orangefs_request_list_lock);
+	list_for_each_entry_safe(op, temp, &orangefs_request_list, list) {
+		__s32 fsid;
+		/* This lock is held past the end of the loop when we break. */
+		spin_lock(&op->lock);
+		if (unlikely(op_state_purged(op) || op_state_given_up(op))) {
+			spin_unlock(&op->lock);
+			continue;
+		}
+
+		fsid = fsid_of_op(op);
+		if (fsid != ORANGEFS_FS_ID_NULL) {
+			int ret;
+			/* Skip ops whose filesystem needs to be mounted. */
+			ret = fs_mount_pending(fsid);
+			if (ret == 1) {
+				gossip_debug(GOSSIP_DEV_DEBUG,
+				    "%s: mount pending, skipping op tag "
+				    "%llu %s\n",
+				    __func__,
+				    llu(op->tag),
+				    get_opname_string(op));
+				spin_unlock(&op->lock);
+				continue;
+			/*
+			 * Skip ops whose filesystem we don't know about unless
+			 * it is being mounted or unmounted.  It is possible for
+			 * a filesystem we don't know about to be unmounted if
+			 * it fails to mount in the kernel after userspace has
+			 * been sent the mount request.
+			 */
+			/* XXX: is there a better way to detect this? */
+			} else if (ret == -1 &&
+				   !(op->upcall.type ==
+					ORANGEFS_VFS_OP_FS_MOUNT ||
+				     op->upcall.type ==
+					ORANGEFS_VFS_OP_GETATTR ||
+				     op->upcall.type ==
+					ORANGEFS_VFS_OP_FS_UMOUNT)) {
+				gossip_debug(GOSSIP_DEV_DEBUG,
+				    "orangefs: skipping op tag %llu %s\n",
+				    llu(op->tag), get_opname_string(op));
+				gossip_err(
+				    "orangefs: ERROR: fs_mount_pending %d\n",
+				    fsid);
+				spin_unlock(&op->lock);
+				continue;
+			}
+		}
+		/*
+		 * Either this op does not pertain to a filesystem, is mounting
+		 * a filesystem, or pertains to a mounted filesystem. Let it
+		 * through.
+		 */
+		cur_op = op;
+		break;
+	}
+
+	/*
+	 * At this point we either have a valid op and can continue or have not
+	 * found an op and must ask the client to try again later.
+	 */
+	if (!cur_op) {
+		spin_unlock(&orangefs_request_list_lock);
+		return -EAGAIN;
+	}
+
+	gossip_debug(GOSSIP_DEV_DEBUG, "%s: reading op tag %llu %s\n",
+		     __func__,
+		     llu(cur_op->tag),
+		     get_opname_string(cur_op));
+
+	/*
+	 * Such an op should never be on the list in the first place. If so, we
+	 * will abort.
+	 */
+	if (op_state_in_progress(cur_op) || op_state_serviced(cur_op)) {
+		gossip_err("orangefs: ERROR: Current op already queued.\n");
+		list_del_init(&cur_op->list);
+		spin_unlock(&cur_op->lock);
+		spin_unlock(&orangefs_request_list_lock);
+		return -EAGAIN;
+	}
+
+	list_del_init(&cur_op->list);
+	spin_unlock(&orangefs_request_list_lock);
+
+	spin_unlock(&cur_op->lock);
+
+	/* Push the upcall out. */
+	ret = copy_to_user(buf, &proto_ver, sizeof(__s32));
+	if (ret != 0)
+		goto error;
+	ret = copy_to_user(buf + sizeof(__s32), &magic, sizeof(__s32));
+	if (ret != 0)
+		goto error;
+	ret = copy_to_user(buf + 2 * sizeof(__s32),
+		&cur_op->tag,
+		sizeof(__u64));
+	if (ret != 0)
+		goto error;
+	ret = copy_to_user(buf + 2 * sizeof(__s32) + sizeof(__u64),
+		&cur_op->upcall,
+		sizeof(struct orangefs_upcall_s));
+	if (ret != 0)
+		goto error;
+
+	spin_lock(&orangefs_htable_ops_in_progress_lock);
+	spin_lock(&cur_op->lock);
+	if (unlikely(op_state_given_up(cur_op))) {
+		spin_unlock(&cur_op->lock);
+		spin_unlock(&orangefs_htable_ops_in_progress_lock);
+		complete(&cur_op->waitq);
+		goto restart;
+	}
+
+	/*
+	 * Set the operation to be in progress and move it between lists since
+	 * it has been sent to the client.
+	 */
+	set_op_state_inprogress(cur_op);
+	gossip_debug(GOSSIP_DEV_DEBUG,
+		     "%s: 1 op:%s: op_state:%d: process:%s:\n",
+		     __func__,
+		     get_opname_string(cur_op),
+		     cur_op->op_state,
+		     current->comm);
+	orangefs_devreq_add_op(cur_op);
+	spin_unlock(&cur_op->lock);
+	spin_unlock(&orangefs_htable_ops_in_progress_lock);
+
+	/* The client only asks to read one size buffer. */
+	return MAX_DEV_REQ_UPSIZE;
+error:
+	/*
+	 * We were unable to copy the op data to the client. Put the op back in
+	 * list. If client has crashed, the op will be purged later when the
+	 * device is released.
+	 */
+	gossip_err("orangefs: Failed to copy data to user space\n");
+	spin_lock(&orangefs_request_list_lock);
+	spin_lock(&cur_op->lock);
+	if (likely(!op_state_given_up(cur_op))) {
+		set_op_state_waiting(cur_op);
+		gossip_debug(GOSSIP_DEV_DEBUG,
+			     "%s: 2 op:%s: op_state:%d: process:%s:\n",
+			     __func__,
+			     get_opname_string(cur_op),
+			     cur_op->op_state,
+			     current->comm);
+		list_add(&cur_op->list, &orangefs_request_list);
+		spin_unlock(&cur_op->lock);
+	} else {
+		spin_unlock(&cur_op->lock);
+		complete(&cur_op->waitq);
+	}
+	spin_unlock(&orangefs_request_list_lock);
+	return -EFAULT;
+}
+
+/*
+ * Function for writev() callers into the device.
+ *
+ * Userspace should have written:
+ *  - __u32 version
+ *  - __u32 magic
+ *  - __u64 tag
+ *  - struct orangefs_downcall_s
+ *  - trailer buffer (in the case of READDIR operations)
+ */
+static ssize_t orangefs_devreq_write_iter(struct kiocb *iocb,
+				      struct iov_iter *iter)
+{
+	ssize_t ret;
+	struct orangefs_kernel_op_s *op = NULL;
+	struct {
+		__u32 version;
+		__u32 magic;
+		__u64 tag;
+	} head;
+	int total = ret = iov_iter_count(iter);
+	int downcall_size = sizeof(struct orangefs_downcall_s);
+	int head_size = sizeof(head);
+
+	gossip_debug(GOSSIP_DEV_DEBUG, "%s: total:%d: ret:%zd:\n",
+		     __func__,
+		     total,
+		     ret);
+
+        if (total < MAX_DEV_REQ_DOWNSIZE) {
+		gossip_err("%s: total:%d: must be at least:%u:\n",
+			   __func__,
+			   total,
+			   (unsigned int) MAX_DEV_REQ_DOWNSIZE);
+		return -EFAULT;
+	}
+
+	if (!copy_from_iter_full(&head, head_size, iter)) {
+		gossip_err("%s: failed to copy head.\n", __func__);
+		return -EFAULT;
+	}
+
+	if (head.version < ORANGEFS_MINIMUM_USERSPACE_VERSION) {
+		gossip_err("%s: userspace claims version"
+			   "%d, minimum version required: %d.\n",
+			   __func__,
+			   head.version,
+			   ORANGEFS_MINIMUM_USERSPACE_VERSION);
+		return -EPROTO;
+	}
+
+	if (head.magic != ORANGEFS_DEVREQ_MAGIC) {
+		gossip_err("Error: Device magic number does not match.\n");
+		return -EPROTO;
+	}
+
+	if (!orangefs_userspace_version) {
+		orangefs_userspace_version = head.version;
+	} else if (orangefs_userspace_version != head.version) {
+		gossip_err("Error: userspace version changes\n");
+		return -EPROTO;
+	}
+
+	/* remove the op from the in progress hash table */
+	op = orangefs_devreq_remove_op(head.tag);
+	if (!op) {
+		gossip_debug(GOSSIP_DEV_DEBUG,
+			     "%s: No one's waiting for tag %llu\n",
+			     __func__, llu(head.tag));
+		return ret;
+	}
+
+	if (!copy_from_iter_full(&op->downcall, downcall_size, iter)) {
+		gossip_err("%s: failed to copy downcall.\n", __func__);
+		goto Efault;
+	}
+
+	if (op->downcall.status)
+		goto wakeup;
+
+	/*
+	 * We've successfully peeled off the head and the downcall.
+	 * Something has gone awry if total doesn't equal the
+	 * sum of head_size, downcall_size and trailer_size.
+	 */
+	if ((head_size + downcall_size + op->downcall.trailer_size) != total) {
+		gossip_err("%s: funky write, head_size:%d"
+			   ": downcall_size:%d: trailer_size:%lld"
+			   ": total size:%d:\n",
+			   __func__,
+			   head_size,
+			   downcall_size,
+			   op->downcall.trailer_size,
+			   total);
+		goto Efault;
+	}
+
+	/* Only READDIR operations should have trailers. */
+	if ((op->downcall.type != ORANGEFS_VFS_OP_READDIR) &&
+	    (op->downcall.trailer_size != 0)) {
+		gossip_err("%s: %x operation with trailer.",
+			   __func__,
+			   op->downcall.type);
+		goto Efault;
+	}
+
+	/* READDIR operations should always have trailers. */
+	if ((op->downcall.type == ORANGEFS_VFS_OP_READDIR) &&
+	    (op->downcall.trailer_size == 0)) {
+		gossip_err("%s: %x operation with no trailer.",
+			   __func__,
+			   op->downcall.type);
+		goto Efault;
+	}
+
+	if (op->downcall.type != ORANGEFS_VFS_OP_READDIR)
+		goto wakeup;
+
+	op->downcall.trailer_buf = vzalloc(op->downcall.trailer_size);
+	if (!op->downcall.trailer_buf)
+		goto Enomem;
+
+	if (!copy_from_iter_full(op->downcall.trailer_buf,
+			         op->downcall.trailer_size, iter)) {
+		gossip_err("%s: failed to copy trailer.\n", __func__);
+		vfree(op->downcall.trailer_buf);
+		goto Efault;
+	}
+
+wakeup:
+	/*
+	 * Return to vfs waitqueue, and back to service_operation
+	 * through wait_for_matching_downcall.
+	 */
+	spin_lock(&op->lock);
+	if (unlikely(op_is_cancel(op))) {
+		spin_unlock(&op->lock);
+		put_cancel(op);
+	} else if (unlikely(op_state_given_up(op))) {
+		spin_unlock(&op->lock);
+		complete(&op->waitq);
+	} else {
+		set_op_state_serviced(op);
+		gossip_debug(GOSSIP_DEV_DEBUG,
+			     "%s: op:%s: op_state:%d: process:%s:\n",
+			     __func__,
+			     get_opname_string(op),
+			     op->op_state,
+			     current->comm);
+		spin_unlock(&op->lock);
+	}
+	return ret;
+
+Efault:
+	op->downcall.status = -(ORANGEFS_ERROR_BIT | 9);
+	ret = -EFAULT;
+	goto wakeup;
+
+Enomem:
+	op->downcall.status = -(ORANGEFS_ERROR_BIT | 8);
+	ret = -ENOMEM;
+	goto wakeup;
+}
+
+/*
+ * NOTE: gets called when the last reference to this device is dropped.
+ * Using the open_access_count variable, we enforce a reference count
+ * on this file so that it can be opened by only one process at a time.
+ * the devreq_mutex is used to make sure all i/o has completed
+ * before we call orangefs_bufmap_finalize, and similar such tricky
+ * situations
+ */
+static int orangefs_devreq_release(struct inode *inode, struct file *file)
+{
+	int unmounted = 0;
+
+	gossip_debug(GOSSIP_DEV_DEBUG,
+		     "%s:pvfs2-client-core: exiting, closing device\n",
+		     __func__);
+
+	mutex_lock(&devreq_mutex);
+	orangefs_bufmap_finalize();
+
+	open_access_count = -1;
+
+	unmounted = mark_all_pending_mounts();
+	gossip_debug(GOSSIP_DEV_DEBUG, "ORANGEFS Device Close: Filesystem(s) %s\n",
+		     (unmounted ? "UNMOUNTED" : "MOUNTED"));
+
+	purge_waiting_ops();
+	purge_inprogress_ops();
+
+	orangefs_bufmap_run_down();
+
+	gossip_debug(GOSSIP_DEV_DEBUG,
+		     "pvfs2-client-core: device close complete\n");
+	open_access_count = 0;
+	orangefs_userspace_version = 0;
+	mutex_unlock(&devreq_mutex);
+	return 0;
+}
+
+int is_daemon_in_service(void)
+{
+	int in_service;
+
+	/*
+	 * What this function does is checks if client-core is alive
+	 * based on the access count we maintain on the device.
+	 */
+	mutex_lock(&devreq_mutex);
+	in_service = open_access_count == 1 ? 0 : -EIO;
+	mutex_unlock(&devreq_mutex);
+	return in_service;
+}
+
+bool __is_daemon_in_service(void)
+{
+	return open_access_count == 1;
+}
+
+static inline long check_ioctl_command(unsigned int command)
+{
+	/* Check for valid ioctl codes */
+	if (_IOC_TYPE(command) != ORANGEFS_DEV_MAGIC) {
+		gossip_err("device ioctl magic numbers don't match! Did you rebuild pvfs2-client-core/libpvfs2? [cmd %x, magic %x != %x]\n",
+			command,
+			_IOC_TYPE(command),
+			ORANGEFS_DEV_MAGIC);
+		return -EINVAL;
+	}
+	/* and valid ioctl commands */
+	if (_IOC_NR(command) >= ORANGEFS_DEV_MAXNR || _IOC_NR(command) <= 0) {
+		gossip_err("Invalid ioctl command number [%d >= %d]\n",
+			   _IOC_NR(command), ORANGEFS_DEV_MAXNR);
+		return -ENOIOCTLCMD;
+	}
+	return 0;
+}
+
+static long dispatch_ioctl_command(unsigned int command, unsigned long arg)
+{
+	static __s32 magic = ORANGEFS_DEVREQ_MAGIC;
+	static __s32 max_up_size = MAX_DEV_REQ_UPSIZE;
+	static __s32 max_down_size = MAX_DEV_REQ_DOWNSIZE;
+	struct ORANGEFS_dev_map_desc user_desc;
+	int ret = 0;
+	int upstream_kmod = 1;
+	struct orangefs_sb_info_s *orangefs_sb;
+
+	/* mtmoore: add locking here */
+
+	switch (command) {
+	case ORANGEFS_DEV_GET_MAGIC:
+		return ((put_user(magic, (__s32 __user *) arg) == -EFAULT) ?
+			-EIO :
+			0);
+	case ORANGEFS_DEV_GET_MAX_UPSIZE:
+		return ((put_user(max_up_size,
+				  (__s32 __user *) arg) == -EFAULT) ?
+					-EIO :
+					0);
+	case ORANGEFS_DEV_GET_MAX_DOWNSIZE:
+		return ((put_user(max_down_size,
+				  (__s32 __user *) arg) == -EFAULT) ?
+					-EIO :
+					0);
+	case ORANGEFS_DEV_MAP:
+		ret = copy_from_user(&user_desc,
+				     (struct ORANGEFS_dev_map_desc __user *)
+				     arg,
+				     sizeof(struct ORANGEFS_dev_map_desc));
+		/* WTF -EIO and not -EFAULT? */
+		return ret ? -EIO : orangefs_bufmap_initialize(&user_desc);
+	case ORANGEFS_DEV_REMOUNT_ALL:
+		gossip_debug(GOSSIP_DEV_DEBUG,
+			     "%s: got ORANGEFS_DEV_REMOUNT_ALL\n",
+			     __func__);
+
+		/*
+		 * remount all mounted orangefs volumes to regain the lost
+		 * dynamic mount tables (if any) -- NOTE: this is done
+		 * without keeping the superblock list locked due to the
+		 * upcall/downcall waiting.  also, the request mutex is
+		 * used to ensure that no operations will be serviced until
+		 * all of the remounts are serviced (to avoid ops between
+		 * mounts to fail)
+		 */
+		ret = mutex_lock_interruptible(&orangefs_request_mutex);
+		if (ret < 0)
+			return ret;
+		gossip_debug(GOSSIP_DEV_DEBUG,
+			     "%s: priority remount in progress\n",
+			     __func__);
+		spin_lock(&orangefs_superblocks_lock);
+		list_for_each_entry(orangefs_sb, &orangefs_superblocks, list) {
+			/*
+			 * We have to drop the spinlock, so entries can be
+			 * removed.  They can't be freed, though, so we just
+			 * keep the forward pointers and zero the back ones -
+			 * that way we can get to the rest of the list.
+			 */
+			if (!orangefs_sb->list.prev)
+				continue;
+			gossip_debug(GOSSIP_DEV_DEBUG,
+				     "%s: Remounting SB %p\n",
+				     __func__,
+				     orangefs_sb);
+
+			spin_unlock(&orangefs_superblocks_lock);
+			ret = orangefs_remount(orangefs_sb);
+			spin_lock(&orangefs_superblocks_lock);
+			if (ret) {
+				gossip_debug(GOSSIP_DEV_DEBUG,
+					     "SB %p remount failed\n",
+					     orangefs_sb);
+				break;
+			}
+		}
+		spin_unlock(&orangefs_superblocks_lock);
+		gossip_debug(GOSSIP_DEV_DEBUG,
+			     "%s: priority remount complete\n",
+			     __func__);
+		mutex_unlock(&orangefs_request_mutex);
+		return ret;
+
+	case ORANGEFS_DEV_UPSTREAM:
+		ret = copy_to_user((void __user *)arg,
+				    &upstream_kmod,
+				    sizeof(upstream_kmod));
+
+		if (ret != 0)
+			return -EIO;
+		else
+			return ret;
+
+	case ORANGEFS_DEV_CLIENT_MASK:
+		return orangefs_debugfs_new_client_mask((void __user *)arg);
+	case ORANGEFS_DEV_CLIENT_STRING:
+		return orangefs_debugfs_new_client_string((void __user *)arg);
+	case ORANGEFS_DEV_DEBUG:
+		return orangefs_debugfs_new_debug((void __user *)arg);
+	default:
+		return -ENOIOCTLCMD;
+	}
+	return -ENOIOCTLCMD;
+}
+
+static long orangefs_devreq_ioctl(struct file *file,
+			       unsigned int command, unsigned long arg)
+{
+	long ret;
+
+	/* Check for properly constructed commands */
+	ret = check_ioctl_command(command);
+	if (ret < 0)
+		return (int)ret;
+
+	return (int)dispatch_ioctl_command(command, arg);
+}
+
+#ifdef CONFIG_COMPAT		/* CONFIG_COMPAT is in .config */
+
+/*  Compat structure for the ORANGEFS_DEV_MAP ioctl */
+struct ORANGEFS_dev_map_desc32 {
+	compat_uptr_t ptr;
+	__s32 total_size;
+	__s32 size;
+	__s32 count;
+};
+
+/*
+ * 32 bit user-space apps' ioctl handlers when kernel modules
+ * is compiled as a 64 bit one
+ */
+static long orangefs_devreq_compat_ioctl(struct file *filp, unsigned int cmd,
+				      unsigned long args)
+{
+	long ret;
+
+	/* Check for properly constructed commands */
+	ret = check_ioctl_command(cmd);
+	if (ret < 0)
+		return ret;
+	if (cmd == ORANGEFS_DEV_MAP) {
+		struct ORANGEFS_dev_map_desc desc;
+		struct ORANGEFS_dev_map_desc32 d32;
+
+		if (copy_from_user(&d32, (void __user *)args, sizeof(d32)))
+			return -EFAULT;
+
+		desc.ptr = compat_ptr(d32.ptr);
+		desc.total_size = d32.total_size;
+		desc.size = d32.size;
+		desc.count = d32.count;
+		return orangefs_bufmap_initialize(&desc);
+	}
+	/* no other ioctl requires translation */
+	return dispatch_ioctl_command(cmd, args);
+}
+
+#endif /* CONFIG_COMPAT is in .config */
+
+static __poll_t orangefs_devreq_poll(struct file *file,
+				      struct poll_table_struct *poll_table)
+{
+	__poll_t poll_revent_mask = 0;
+
+	poll_wait(file, &orangefs_request_list_waitq, poll_table);
+
+	if (!list_empty(&orangefs_request_list))
+		poll_revent_mask |= EPOLLIN;
+	return poll_revent_mask;
+}
+
+/* the assigned character device major number */
+static int orangefs_dev_major;
+
+static const struct file_operations orangefs_devreq_file_operations = {
+	.owner = THIS_MODULE,
+	.read = orangefs_devreq_read,
+	.write_iter = orangefs_devreq_write_iter,
+	.open = orangefs_devreq_open,
+	.release = orangefs_devreq_release,
+	.unlocked_ioctl = orangefs_devreq_ioctl,
+
+#ifdef CONFIG_COMPAT		/* CONFIG_COMPAT is in .config */
+	.compat_ioctl = orangefs_devreq_compat_ioctl,
+#endif
+	.poll = orangefs_devreq_poll
+};
+
+/*
+ * Initialize orangefs device specific state:
+ * Must be called at module load time only
+ */
+int orangefs_dev_init(void)
+{
+	/* register orangefs-req device  */
+	orangefs_dev_major = register_chrdev(0,
+					  ORANGEFS_REQDEVICE_NAME,
+					  &orangefs_devreq_file_operations);
+	if (orangefs_dev_major < 0) {
+		gossip_debug(GOSSIP_DEV_DEBUG,
+			     "Failed to register /dev/%s (error %d)\n",
+			     ORANGEFS_REQDEVICE_NAME, orangefs_dev_major);
+		return orangefs_dev_major;
+	}
+
+	gossip_debug(GOSSIP_DEV_DEBUG,
+		     "*** /dev/%s character device registered ***\n",
+		     ORANGEFS_REQDEVICE_NAME);
+	gossip_debug(GOSSIP_DEV_DEBUG, "'mknod /dev/%s c %d 0'.\n",
+		     ORANGEFS_REQDEVICE_NAME, orangefs_dev_major);
+	return 0;
+}
+
+void orangefs_dev_cleanup(void)
+{
+	unregister_chrdev(orangefs_dev_major, ORANGEFS_REQDEVICE_NAME);
+	gossip_debug(GOSSIP_DEV_DEBUG,
+		     "*** /dev/%s character device unregistered ***\n",
+		     ORANGEFS_REQDEVICE_NAME);
+}

linux-7.2.3/fs/orangefs/dir.c

@@ -0,0 +1,398 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright 2017 Omnibond Systems, L.L.C.
+ */
+
+#include <linux/filelock.h>
+#include "protocol.h"
+#include "orangefs-kernel.h"
+#include "orangefs-bufmap.h"
+
+struct orangefs_dir_part {
+	struct orangefs_dir_part *next;
+	size_t len;
+};
+
+struct orangefs_dir {
+	__u64 token;
+	struct orangefs_dir_part *part;
+	loff_t end;
+	int error;
+};
+
+#define PART_SHIFT (24)
+#define PART_SIZE (1<<24)
+#define PART_MASK (~(PART_SIZE - 1))
+
+/*
+ * There can be up to 512 directory entries.  Each entry is encoded as
+ * follows:
+ * 4 bytes: string size (n)
+ * n bytes: string
+ * 1 byte: trailing zero
+ * padding to 8 bytes
+ * 16 bytes: khandle
+ * padding to 8 bytes
+ *
+ * The trailer_buf starts with a struct orangefs_readdir_response_s
+ * which must be skipped to get to the directory data.
+ *
+ * The data which is received from the userspace daemon is termed a
+ * part and is stored in a linked list in case more than one part is
+ * needed for a large directory.
+ *
+ * The position pointer (ctx->pos) encodes the part and offset on which
+ * to begin reading at.  Bits above PART_SHIFT encode the part and bits
+ * below PART_SHIFT encode the offset.  Parts are stored in a linked
+ * list which grows as data is received from the server.  The overhead
+ * associated with managing the list is presumed to be small compared to
+ * the overhead of communicating with the server.
+ *
+ * As data is received from the server, it is placed at the end of the
+ * part list.  Data is parsed from the current position as it is needed.
+ * When data is determined to be corrupt, it is either because the
+ * userspace component has sent back corrupt data or because the file
+ * pointer has been moved to an invalid location.  Since the two cannot
+ * be differentiated, return EIO.
+ *
+ * Part zero is synthesized to contains `.' and `..'.  Part one is the
+ * first part of the part list.
+ */
+
+static int do_readdir(struct orangefs_dir *od, struct inode *inode,
+    struct orangefs_kernel_op_s *op)
+{
+	struct orangefs_inode_s *oi = ORANGEFS_I(inode);
+	struct orangefs_readdir_response_s *resp;
+	int bufi, r;
+
+	/*
+	 * Despite the badly named field, readdir does not use shared
+	 * memory.  However, there are a limited number of readdir
+	 * slots, which must be allocated here.  This flag simply tells
+	 * the op scheduler to return the op here for retry.
+	 */
+	op->uses_shared_memory = 1;
+	op->upcall.req.readdir.refn = oi->refn;
+	op->upcall.req.readdir.token = od->token;
+	op->upcall.req.readdir.max_dirent_count =
+	    ORANGEFS_MAX_DIRENT_COUNT_READDIR;
+
+again:
+	bufi = orangefs_readdir_index_get();
+	if (bufi < 0) {
+		od->error = bufi;
+		return bufi;
+	}
+
+	op->upcall.req.readdir.buf_index = bufi;
+
+	r = service_operation(op, "orangefs_readdir",
+	    get_interruptible_flag(inode));
+
+	orangefs_readdir_index_put(bufi);
+
+	if (op_state_purged(op)) {
+		if (r == -EAGAIN) {
+			vfree(op->downcall.trailer_buf);
+			goto again;
+		} else if (r == -EIO) {
+			vfree(op->downcall.trailer_buf);
+			od->error = r;
+			return r;
+		}
+	}
+
+	if (r < 0) {
+		vfree(op->downcall.trailer_buf);
+		od->error = r;
+		return r;
+	} else if (op->downcall.status) {
+		vfree(op->downcall.trailer_buf);
+		od->error = op->downcall.status;
+		return op->downcall.status;
+	}
+
+	/*
+	 * The maximum size is size per entry times the 512 entries plus
+	 * the header.  This is well under the limit.
+	 */
+	if (op->downcall.trailer_size > PART_SIZE) {
+		vfree(op->downcall.trailer_buf);
+		od->error = -EIO;
+		return -EIO;
+	}
+
+	resp = (struct orangefs_readdir_response_s *)
+	    op->downcall.trailer_buf;
+	od->token = resp->token;
+	return 0;
+}
+
+static int parse_readdir(struct orangefs_dir *od,
+    struct orangefs_kernel_op_s *op)
+{
+	struct orangefs_dir_part *part, *new;
+	size_t count;
+
+	count = 1;
+	part = od->part;
+	while (part) {
+		count++;
+		if (part->next)
+			part = part->next;
+		else
+			break;
+	}
+
+	new = (void *)op->downcall.trailer_buf;
+	new->next = NULL;
+	new->len = op->downcall.trailer_size -
+	    sizeof(struct orangefs_readdir_response_s);
+	if (!od->part)
+		od->part = new;
+	else
+		part->next = new;
+	count++;
+	od->end = count << PART_SHIFT;
+
+	return 0;
+}
+
+static int orangefs_dir_more(struct orangefs_dir *od, struct inode *inode)
+{
+	struct orangefs_kernel_op_s *op;
+	int r;
+
+	op = op_alloc(ORANGEFS_VFS_OP_READDIR);
+	if (!op) {
+		od->error = -ENOMEM;
+		return -ENOMEM;
+	}
+	r = do_readdir(od, inode, op);
+	if (r) {
+		od->error = r;
+		goto out;
+	}
+	r = parse_readdir(od, op);
+	if (r) {
+		od->error = r;
+		goto out;
+	}
+
+	od->error = 0;
+out:
+	op_release(op);
+	return od->error;
+}
+
+static int fill_from_part(struct orangefs_dir_part *part,
+    struct dir_context *ctx)
+{
+	const int offset = sizeof(struct orangefs_readdir_response_s);
+	struct orangefs_khandle *khandle;
+	__u32 *len;
+	u64 padlen;
+	loff_t i;
+	char *s;
+	i = ctx->pos & ~PART_MASK;
+
+	/* The file offset from userspace is too large. */
+	if (i > part->len)
+		return 1;
+
+	/*
+	 * If the seek pointer is positioned just before an entry it
+	 * should find the next entry.
+	 */
+	if (i % 8)
+		i = i + (8 - i%8)%8;
+
+	while (i < part->len) {
+		if (part->len < i + sizeof *len)
+			break;
+		len = (void *)part + offset + i;
+		/*
+		 * len is the size of the string itself.  padlen is the
+		 * total size of the encoded string.
+		 */
+		padlen = (u64)sizeof *len + *len + 1;
+		padlen += (8 - padlen % 8) % 8;
+		if (part->len < i + padlen + sizeof *khandle)
+			goto next;
+		s = (void *)part + offset + i + sizeof *len;
+		if (s[*len] != 0)
+			goto next;
+		khandle = (void *)part + offset + i + padlen;
+		if (!dir_emit(ctx, s, *len,
+		    orangefs_khandle_to_ino(khandle),
+		    DT_UNKNOWN))
+			return 0;
+		i += padlen + sizeof *khandle;
+		i = i + (8 - i%8)%8;
+		BUG_ON(i > part->len);
+		ctx->pos = (ctx->pos & PART_MASK) | i;
+		continue;
+next:
+		i += 8;
+	}
+	return 1;
+}
+
+static int orangefs_dir_fill(struct orangefs_dir *od, struct dir_context *ctx)
+{
+	struct orangefs_dir_part *part;
+	size_t count;
+
+	count = ((ctx->pos & PART_MASK) >> PART_SHIFT) - 1;
+
+	part = od->part;
+	while (part->next && count) {
+		count--;
+		part = part->next;
+	}
+	/* This means the userspace file offset is invalid. */
+	if (count) {
+		od->error = -EIO;
+		return -EIO;
+	}
+
+	while (part && part->len) {
+		int r;
+		r = fill_from_part(part, ctx);
+		if (r < 0) {
+			od->error = r;
+			return r;
+		} else if (r == 0) {
+			/* Userspace buffer is full. */
+			break;
+		} else {
+			/*
+			 * The part ran out of data.  Move to the next
+			 * part. */
+			ctx->pos = (ctx->pos & PART_MASK) +
+			    (1 << PART_SHIFT);
+			part = part->next;
+		}
+	}
+	return 0;
+}
+
+static loff_t orangefs_dir_llseek(struct file *file, loff_t offset,
+    int whence)
+{
+	struct orangefs_dir *od = file->private_data;
+	/*
+	 * Delete the stored data so userspace sees new directory
+	 * entries.
+	 */
+	if (!whence && offset < od->end) {
+		struct orangefs_dir_part *part = od->part;
+		while (part) {
+			struct orangefs_dir_part *next = part->next;
+			vfree(part);
+			part = next;
+		}
+		od->token = ORANGEFS_ITERATE_START;
+		od->part = NULL;
+		od->end = 1 << PART_SHIFT;
+	}
+	return default_llseek(file, offset, whence);
+}
+
+static int orangefs_dir_iterate(struct file *file,
+    struct dir_context *ctx)
+{
+	struct orangefs_dir *od = file->private_data;
+	struct inode *inode = file_inode(file);
+	int r;
+
+	if (od->error)
+		return od->error;
+
+	if (ctx->pos == 0) {
+		if (!dir_emit_dot(file, ctx))
+			return 0;
+		ctx->pos++;
+	}
+	if (ctx->pos == 1) {
+		if (!dir_emit_dotdot(file, ctx))
+			return 0;
+		ctx->pos = 1 << PART_SHIFT;
+	}
+
+	/*
+	 * The seek position is in the first synthesized part but is not
+	 * valid.
+	 */
+	if ((ctx->pos & PART_MASK) == 0)
+		return -EIO;
+
+	r = 0;
+
+	/*
+	 * Must read more if the user has sought past what has been read
+	 * so far.  Stop a user who has sought past the end.
+	 */
+	while (od->token != ORANGEFS_ITERATE_END &&
+	    ctx->pos > od->end) {
+		r = orangefs_dir_more(od, inode);
+		if (r)
+			return r;
+	}
+	if (od->token == ORANGEFS_ITERATE_END && ctx->pos > od->end)
+		return -EIO;
+
+	/* Then try to fill if there's any left in the buffer. */
+	if (ctx->pos < od->end) {
+		r = orangefs_dir_fill(od, ctx);
+		if (r)
+			return r;
+	}
+
+	/* Finally get some more and try to fill. */
+	if (od->token != ORANGEFS_ITERATE_END) {
+		r = orangefs_dir_more(od, inode);
+		if (r)
+			return r;
+		r = orangefs_dir_fill(od, ctx);
+	}
+
+	return r;
+}
+
+static int orangefs_dir_open(struct inode *inode, struct file *file)
+{
+	struct orangefs_dir *od;
+	file->private_data = kmalloc_obj(struct orangefs_dir);
+	if (!file->private_data)
+		return -ENOMEM;
+	od = file->private_data;
+	od->token = ORANGEFS_ITERATE_START;
+	od->part = NULL;
+	od->end = 1 << PART_SHIFT;
+	od->error = 0;
+	return 0;
+}
+
+static int orangefs_dir_release(struct inode *inode, struct file *file)
+{
+	struct orangefs_dir *od = file->private_data;
+	struct orangefs_dir_part *part = od->part;
+	while (part) {
+		struct orangefs_dir_part *next = part->next;
+		vfree(part);
+		part = next;
+	}
+	kfree(od);
+	return 0;
+}
+
+const struct file_operations orangefs_dir_operations = {
+	.llseek = orangefs_dir_llseek,
+	.read = generic_read_dir,
+	.iterate_shared = orangefs_dir_iterate,
+	.open = orangefs_dir_open,
+	.release = orangefs_dir_release,
+	.setlease = generic_setlease,
+};

linux-7.2.3/fs/orangefs/downcall.h

@@ -0,0 +1,137 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ *
+ * See COPYING in top-level directory.
+ */
+
+/*
+ *  Definitions of downcalls used in Linux kernel module.
+ */
+
+#ifndef __DOWNCALL_H
+#define __DOWNCALL_H
+
+/*
+ * Sanitized the device-client core interaction
+ * for clean 32-64 bit usage
+ */
+struct orangefs_io_response {
+	__s64 amt_complete;
+};
+
+struct orangefs_lookup_response {
+	struct orangefs_object_kref refn;
+};
+
+struct orangefs_create_response {
+	struct orangefs_object_kref refn;
+};
+
+struct orangefs_symlink_response {
+	struct orangefs_object_kref refn;
+};
+
+struct orangefs_getattr_response {
+	struct ORANGEFS_sys_attr_s attributes;
+	char link_target[ORANGEFS_NAME_MAX];
+};
+
+struct orangefs_mkdir_response {
+	struct orangefs_object_kref refn;
+};
+
+struct orangefs_statfs_response {
+	__s64 block_size;
+	__s64 blocks_total;
+	__s64 blocks_avail;
+	__s64 files_total;
+	__s64 files_avail;
+};
+
+struct orangefs_fs_mount_response {
+	__s32 fs_id;
+	__s32 id;
+	struct orangefs_khandle root_khandle;
+};
+
+/* the getxattr response is the attribute value */
+struct orangefs_getxattr_response {
+	__s32 val_sz;
+	__s32 __pad1;
+	char val[ORANGEFS_MAX_XATTR_VALUELEN];
+};
+
+/* the listxattr response is an array of attribute names */
+struct orangefs_listxattr_response {
+	__s32 returned_count;
+	__s32 __pad1;
+	__u64 token;
+	char key[ORANGEFS_MAX_XATTR_LISTLEN * ORANGEFS_MAX_XATTR_NAMELEN];
+	__s32 keylen;
+	__s32 __pad2;
+	__s32 lengths[ORANGEFS_MAX_XATTR_LISTLEN];
+};
+
+struct orangefs_param_response {
+	union {
+		__s64 value64;
+		__s32 value32[2];
+	} u;
+};
+
+#define PERF_COUNT_BUF_SIZE 4096
+struct orangefs_perf_count_response {
+	char buffer[PERF_COUNT_BUF_SIZE];
+};
+
+#define FS_KEY_BUF_SIZE 4096
+struct orangefs_fs_key_response {
+	__s32 fs_keylen;
+	__s32 __pad1;
+	char fs_key[FS_KEY_BUF_SIZE];
+};
+
+/* 2.9.6 */
+struct orangefs_features_response {
+	__u64 features;
+};
+
+struct orangefs_downcall_s {
+	__s32 type;
+	__s32 status;
+	/* currently trailer is used only by readdir */
+	__s64 trailer_size;
+	char *trailer_buf;
+
+	union {
+		struct orangefs_io_response io;
+		struct orangefs_lookup_response lookup;
+		struct orangefs_create_response create;
+		struct orangefs_symlink_response sym;
+		struct orangefs_getattr_response getattr;
+		struct orangefs_mkdir_response mkdir;
+		struct orangefs_statfs_response statfs;
+		struct orangefs_fs_mount_response fs_mount;
+		struct orangefs_getxattr_response getxattr;
+		struct orangefs_listxattr_response listxattr;
+		struct orangefs_param_response param;
+		struct orangefs_perf_count_response perf_count;
+		struct orangefs_fs_key_response fs_key;
+		struct orangefs_features_response features;
+	} resp;
+};
+
+/*
+ * The readdir response comes in the trailer.  It is followed by the
+ * directory entries as described in dir.c.
+ */
+
+struct orangefs_readdir_response_s {
+	__u64 token;
+	__u64 directory_version;
+	__u32 __pad2;
+	__u32 orangefs_dirent_outcount;
+};
+
+#endif /* __DOWNCALL_H */

linux-7.2.3/fs/orangefs/file.c

@@ -0,0 +1,587 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ * Copyright 2018 Omnibond Systems, L.L.C.
+ *
+ * See COPYING in top-level directory.
+ */
+
+/*
+ *  Linux VFS file operations.
+ */
+
+#include "protocol.h"
+#include "orangefs-kernel.h"
+#include "orangefs-bufmap.h"
+#include <linux/fs.h>
+#include <linux/filelock.h>
+#include <linux/pagemap.h>
+
+static int flush_racache(struct inode *inode)
+{
+	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
+	struct orangefs_kernel_op_s *new_op;
+	int ret;
+
+	gossip_debug(GOSSIP_UTILS_DEBUG,
+	    "%s: %pU: Handle is %pU | fs_id %d\n", __func__,
+	    get_khandle_from_ino(inode), &orangefs_inode->refn.khandle,
+	    orangefs_inode->refn.fs_id);
+
+	new_op = op_alloc(ORANGEFS_VFS_OP_RA_FLUSH);
+	if (!new_op)
+		return -ENOMEM;
+	new_op->upcall.req.ra_cache_flush.refn = orangefs_inode->refn;
+
+	ret = service_operation(new_op, "orangefs_flush_racache",
+	    get_interruptible_flag(inode));
+
+	gossip_debug(GOSSIP_UTILS_DEBUG, "%s: got return value of %d\n",
+	    __func__, ret);
+
+	op_release(new_op);
+	return ret;
+}
+
+/*
+ * Post and wait for the I/O upcall to finish
+ */
+ssize_t wait_for_direct_io(enum ORANGEFS_io_type type, struct inode *inode,
+	loff_t *offset, struct iov_iter *iter, size_t total_size,
+	loff_t readahead_size, struct orangefs_write_range *wr,
+	int *index_return, struct file *file)
+{
+	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
+	struct orangefs_khandle *handle = &orangefs_inode->refn.khandle;
+	struct orangefs_kernel_op_s *new_op = NULL;
+	int buffer_index;
+	ssize_t ret;
+	size_t copy_amount;
+	bool open_for_read;
+	bool open_for_write;
+
+	new_op = op_alloc(ORANGEFS_VFS_OP_FILE_IO);
+	if (!new_op)
+		return -ENOMEM;
+
+	/* synchronous I/O */
+	new_op->upcall.req.io.readahead_size = readahead_size;
+	new_op->upcall.req.io.io_type = type;
+	new_op->upcall.req.io.refn = orangefs_inode->refn;
+
+populate_shared_memory:
+	/* get a shared buffer index */
+	buffer_index = orangefs_bufmap_get();
+	if (buffer_index < 0) {
+		ret = buffer_index;
+		gossip_debug(GOSSIP_FILE_DEBUG,
+			     "%s: orangefs_bufmap_get failure (%zd)\n",
+			     __func__, ret);
+		goto out;
+	}
+	gossip_debug(GOSSIP_FILE_DEBUG,
+		     "%s(%pU): GET op %p -> buffer_index %d\n",
+		     __func__,
+		     handle,
+		     new_op,
+		     buffer_index);
+
+	new_op->uses_shared_memory = 1;
+	new_op->upcall.req.io.buf_index = buffer_index;
+	new_op->upcall.req.io.count = total_size;
+	new_op->upcall.req.io.offset = *offset;
+	if (type == ORANGEFS_IO_WRITE && wr) {
+		new_op->upcall.uid = from_kuid(&init_user_ns, wr->uid);
+		new_op->upcall.gid = from_kgid(&init_user_ns, wr->gid);
+	}
+	/*
+	 * Orangefs has no open, and orangefs checks file permissions
+	 * on each file access. Posix requires that file permissions
+	 * be checked on open and nowhere else. Orangefs-through-the-kernel
+	 * needs to seem posix compliant.
+	 *
+	 * The VFS opens files, even if the filesystem provides no
+	 * method. We can see if a file was successfully opened for
+	 * read and or for write by looking at file->f_mode.
+	 *
+	 * When writes are flowing from the page cache, file is no
+	 * longer available. We can trust the VFS to have checked
+	 * file->f_mode before writing to the page cache.
+	 *
+	 * The mode of a file might change between when it is opened
+	 * and IO commences, or it might be created with an arbitrary mode.
+	 *
+	 * We'll make sure we don't hit EACCES during the IO stage by
+	 * using UID 0. Some of the time we have access without changing
+	 * to UID 0 - how to check?
+	 */
+	if (file) {
+		open_for_write = file->f_mode & FMODE_WRITE;
+		open_for_read = file->f_mode & FMODE_READ;
+	} else {
+		open_for_write = 1;
+		open_for_read = 0; /* not relevant? */
+	}
+	if ((type == ORANGEFS_IO_WRITE) && open_for_write)
+		new_op->upcall.uid = 0;
+	if ((type == ORANGEFS_IO_READ) && open_for_read)
+		new_op->upcall.uid = 0;
+
+	gossip_debug(GOSSIP_FILE_DEBUG,
+		     "%s(%pU): offset: %llu total_size: %zd\n",
+		     __func__,
+		     handle,
+		     llu(*offset),
+		     total_size);
+	/*
+	 * Stage 1: copy the buffers into client-core's address space
+	 */
+	if (type == ORANGEFS_IO_WRITE && total_size) {
+		ret = orangefs_bufmap_copy_from_iovec(iter, buffer_index,
+		    total_size);
+		if (ret < 0) {
+			gossip_err("%s: Failed to copy-in buffers. Please make sure that the pvfs2-client is running. %ld\n",
+			    __func__, (long)ret);
+			goto out;
+		}
+	}
+
+	gossip_debug(GOSSIP_FILE_DEBUG,
+		     "%s(%pU): Calling post_io_request with tag (%llu)\n",
+		     __func__,
+		     handle,
+		     llu(new_op->tag));
+
+	/* Stage 2: Service the I/O operation */
+	ret = service_operation(new_op,
+				type == ORANGEFS_IO_WRITE ?
+					"file_write" :
+					"file_read",
+				get_interruptible_flag(inode));
+
+	/*
+	 * If service_operation() returns -EAGAIN #and# the operation was
+	 * purged from orangefs_request_list or htable_ops_in_progress, then
+	 * we know that the client was restarted, causing the shared memory
+	 * area to be wiped clean.  To restart a  write operation in this
+	 * case, we must re-copy the data from the user's iovec to a NEW
+	 * shared memory location. To restart a read operation, we must get
+	 * a new shared memory location.
+	 */
+	if (ret == -EAGAIN && op_state_purged(new_op)) {
+		orangefs_bufmap_put(buffer_index);
+		if (type == ORANGEFS_IO_WRITE)
+			iov_iter_revert(iter, total_size);
+		gossip_debug(GOSSIP_FILE_DEBUG,
+			     "%s:going to repopulate_shared_memory.\n",
+			     __func__);
+		goto populate_shared_memory;
+	}
+
+	if (ret < 0) {
+		if (ret == -EINTR) {
+			/*
+			 * We can't return EINTR if any data was written,
+			 * it's not POSIX. It is minimally acceptable
+			 * to give a partial write, the way NFS does.
+			 *
+			 * It would be optimal to return all or nothing,
+			 * but if a userspace write is bigger than
+			 * an IO buffer, and the interrupt occurs
+			 * between buffer writes, that would not be
+			 * possible.
+			 */
+			switch (new_op->op_state - OP_VFS_STATE_GIVEN_UP) {
+			/*
+			 * If the op was waiting when the interrupt
+			 * occurred, then the client-core did not
+			 * trigger the write.
+			 */
+			case OP_VFS_STATE_WAITING:
+				if (*offset == 0)
+					ret = -EINTR;
+				else
+					ret = 0;
+				break;
+			/*
+			 * If the op was in progress when the interrupt
+			 * occurred, then the client-core was able to
+			 * trigger the write.
+			 */
+			case OP_VFS_STATE_INPROGR:
+				if (type == ORANGEFS_IO_READ)
+					ret = -EINTR;
+				else
+					ret = total_size;
+				break;
+			default:
+				gossip_err("%s: unexpected op state :%d:.\n",
+					   __func__,
+					   new_op->op_state);
+				ret = 0;
+				break;
+			}
+			gossip_debug(GOSSIP_FILE_DEBUG,
+				     "%s: got EINTR, state:%d: %p\n",
+				     __func__,
+				     new_op->op_state,
+				     new_op);
+		} else {
+			gossip_err("%s: error in %s handle %pU, returning %zd\n",
+				__func__,
+				type == ORANGEFS_IO_READ ?
+					"read from" : "write to",
+				handle, ret);
+		}
+		if (orangefs_cancel_op_in_progress(new_op))
+			return ret;
+
+		goto out;
+	}
+
+	/*
+	 * Stage 3: Post copy buffers from client-core's address space
+	 */
+	if (type == ORANGEFS_IO_READ && new_op->downcall.resp.io.amt_complete) {
+		/*
+		 * NOTE: the iovector can either contain addresses which
+		 *       can futher be kernel-space or user-space addresses.
+		 *       or it can pointers to struct page's
+		 */
+
+		copy_amount = new_op->downcall.resp.io.amt_complete;
+
+		ret = orangefs_bufmap_copy_to_iovec(iter, buffer_index,
+			copy_amount);
+		if (ret < 0) {
+			gossip_err("%s: Failed to copy-out buffers. Please make sure that the pvfs2-client is running (%ld)\n",
+			    __func__, (long)ret);
+			goto out;
+		}
+	}
+	gossip_debug(GOSSIP_FILE_DEBUG,
+	    "%s(%pU): Amount %s, returned by the sys-io call:%d\n",
+	    __func__,
+	    handle,
+	    type == ORANGEFS_IO_READ ?  "read" : "written",
+	    (int)new_op->downcall.resp.io.amt_complete);
+
+	ret = new_op->downcall.resp.io.amt_complete;
+
+out:
+	if (buffer_index >= 0) {
+		orangefs_bufmap_put(buffer_index);
+		gossip_debug(GOSSIP_FILE_DEBUG,
+			"%s(%pU): PUT buffer_index %d\n",
+			__func__, handle, buffer_index);
+	}
+	op_release(new_op);
+	return ret;
+}
+
+int orangefs_revalidate_mapping(struct inode *inode)
+{
+	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
+	struct address_space *mapping = inode->i_mapping;
+	unsigned long *bitlock = &orangefs_inode->bitlock;
+	int ret;
+
+	while (1) {
+		ret = wait_on_bit(bitlock, 1, TASK_KILLABLE);
+		if (ret)
+			return ret;
+		spin_lock(&inode->i_lock);
+		if (test_bit(1, bitlock)) {
+			spin_unlock(&inode->i_lock);
+			continue;
+		}
+		if (!time_before(jiffies, orangefs_inode->mapping_time))
+			break;
+		spin_unlock(&inode->i_lock);
+		return 0;
+	}
+
+	set_bit(1, bitlock);
+	smp_wmb();
+	spin_unlock(&inode->i_lock);
+
+	unmap_mapping_range(mapping, 0, 0, 0);
+	ret = filemap_write_and_wait(mapping);
+	if (!ret)
+		ret = invalidate_inode_pages2(mapping);
+
+	orangefs_inode->mapping_time = jiffies +
+	    orangefs_cache_timeout_msecs*HZ/1000;
+
+	clear_bit(1, bitlock);
+	smp_mb__after_atomic();
+	wake_up_bit(bitlock, 1);
+
+	return ret;
+}
+
+static ssize_t orangefs_file_read_iter(struct kiocb *iocb,
+    struct iov_iter *iter)
+{
+	int ret;
+	orangefs_stats.reads++;
+
+	down_read(&file_inode(iocb->ki_filp)->i_rwsem);
+	ret = orangefs_revalidate_mapping(file_inode(iocb->ki_filp));
+	if (ret)
+		goto out;
+
+	ret = generic_file_read_iter(iocb, iter);
+out:
+	up_read(&file_inode(iocb->ki_filp)->i_rwsem);
+	return ret;
+}
+
+static ssize_t orangefs_file_splice_read(struct file *in, loff_t *ppos,
+					 struct pipe_inode_info *pipe,
+					 size_t len, unsigned int flags)
+{
+	struct inode *inode = file_inode(in);
+	ssize_t ret;
+
+	orangefs_stats.reads++;
+
+	down_read(&inode->i_rwsem);
+	ret = orangefs_revalidate_mapping(inode);
+	if (ret)
+		goto out;
+
+	ret = filemap_splice_read(in, ppos, pipe, len, flags);
+out:
+	up_read(&inode->i_rwsem);
+	return ret;
+}
+
+static ssize_t orangefs_file_write_iter(struct kiocb *iocb,
+    struct iov_iter *iter)
+{
+	int ret;
+	orangefs_stats.writes++;
+
+	if (iocb->ki_pos > i_size_read(file_inode(iocb->ki_filp))) {
+		ret = orangefs_revalidate_mapping(file_inode(iocb->ki_filp));
+		if (ret)
+			return ret;
+	}
+
+	ret = generic_file_write_iter(iocb, iter);
+	return ret;
+}
+
+static vm_fault_t orangefs_fault(struct vm_fault *vmf)
+{
+	struct file *file = vmf->vma->vm_file;
+	int ret;
+	ret = orangefs_inode_getattr(file->f_mapping->host,
+	    ORANGEFS_GETATTR_SIZE);
+	if (ret == -ESTALE)
+		ret = -EIO;
+	if (ret) {
+		gossip_err("%s: orangefs_inode_getattr failed, "
+		    "ret:%d:.\n", __func__, ret);
+		return VM_FAULT_SIGBUS;
+	}
+	return filemap_fault(vmf);
+}
+
+static const struct vm_operations_struct orangefs_file_vm_ops = {
+	.fault = orangefs_fault,
+	.map_pages = filemap_map_pages,
+	.page_mkwrite = orangefs_page_mkwrite,
+};
+
+/*
+ * Memory map a region of a file.
+ */
+static int orangefs_file_mmap_prepare(struct vm_area_desc *desc)
+{
+	struct file *file = desc->file;
+	int ret;
+
+	ret = orangefs_revalidate_mapping(file_inode(file));
+	if (ret)
+		return ret;
+
+	gossip_debug(GOSSIP_FILE_DEBUG,
+		     "orangefs_file_mmap: called on %pD\n", file);
+
+	/* set the sequential readahead hint */
+	vma_desc_set_flags(desc, VMA_SEQ_READ_BIT);
+	vma_desc_clear_flags(desc, VMA_RAND_READ_BIT);
+
+	file_accessed(file);
+	desc->vm_ops = &orangefs_file_vm_ops;
+	return 0;
+}
+
+#define mapping_nrpages(idata) ((idata)->nrpages)
+
+/*
+ * Called to notify the module that there are no more references to
+ * this file (i.e. no processes have it open).
+ *
+ * \note Not called when each file is closed.
+ */
+static int orangefs_file_release(struct inode *inode, struct file *file)
+{
+	gossip_debug(GOSSIP_FILE_DEBUG,
+		     "orangefs_file_release: called on %pD\n",
+		     file);
+
+	/*
+	 * remove all associated inode pages from the page cache and
+	 * readahead cache (if any); this forces an expensive refresh of
+	 * data for the next caller of mmap (or 'get_block' accesses)
+	 */
+	if (mapping_nrpages(file->f_mapping)) {
+		if (orangefs_features & ORANGEFS_FEATURE_READAHEAD) {
+			gossip_debug(GOSSIP_INODE_DEBUG,
+			    "calling flush_racache on %pU\n",
+			    get_khandle_from_ino(inode));
+			flush_racache(inode);
+			gossip_debug(GOSSIP_INODE_DEBUG,
+			    "flush_racache finished\n");
+		}
+
+	}
+	return 0;
+}
+
+/*
+ * Push all data for a specific file onto permanent storage.
+ */
+static int orangefs_fsync(struct file *file,
+		       loff_t start,
+		       loff_t end,
+		       int datasync)
+{
+	int ret;
+	struct orangefs_inode_s *orangefs_inode =
+		ORANGEFS_I(file_inode(file));
+	struct orangefs_kernel_op_s *new_op = NULL;
+
+	ret = filemap_write_and_wait_range(file_inode(file)->i_mapping,
+	    start, end);
+	if (ret < 0)
+		return ret;
+
+	new_op = op_alloc(ORANGEFS_VFS_OP_FSYNC);
+	if (!new_op)
+		return -ENOMEM;
+	new_op->upcall.req.fsync.refn = orangefs_inode->refn;
+
+	ret = service_operation(new_op,
+			"orangefs_fsync",
+			get_interruptible_flag(file_inode(file)));
+
+	gossip_debug(GOSSIP_FILE_DEBUG,
+		     "orangefs_fsync got return value of %d\n",
+		     ret);
+
+	op_release(new_op);
+	return ret;
+}
+
+/*
+ * Change the file pointer position for an instance of an open file.
+ *
+ * \note If .llseek is overriden, we must acquire lock as described in
+ *       Documentation/filesystems/locking.rst.
+ *
+ * Future upgrade could support SEEK_DATA and SEEK_HOLE but would
+ * require much changes to the FS
+ */
+static loff_t orangefs_file_llseek(struct file *file, loff_t offset, int origin)
+{
+	int ret = -EINVAL;
+	struct inode *inode = file_inode(file);
+
+	if (origin == SEEK_END) {
+		/*
+		 * revalidate the inode's file size.
+		 * NOTE: We are only interested in file size here,
+		 * so we set mask accordingly.
+		 */
+		ret = orangefs_inode_getattr(file->f_mapping->host,
+		    ORANGEFS_GETATTR_SIZE);
+		if (ret == -ESTALE)
+			ret = -EIO;
+		if (ret) {
+			gossip_debug(GOSSIP_FILE_DEBUG,
+				     "%s:%s:%d calling make bad inode\n",
+				     __FILE__,
+				     __func__,
+				     __LINE__);
+			return ret;
+		}
+	}
+
+	gossip_debug(GOSSIP_FILE_DEBUG,
+		     "orangefs_file_llseek: offset is %ld | origin is %d"
+		     " | inode size is %lu\n",
+		     (long)offset,
+		     origin,
+		     (unsigned long)i_size_read(inode));
+
+	return generic_file_llseek(file, offset, origin);
+}
+
+/*
+ * Support local locks (locks that only this kernel knows about)
+ * if Orangefs was mounted -o local_lock.
+ */
+static int orangefs_lock(struct file *filp, int cmd, struct file_lock *fl)
+{
+	int rc = -EINVAL;
+
+	if (ORANGEFS_SB(file_inode(filp)->i_sb)->flags & ORANGEFS_OPT_LOCAL_LOCK) {
+		if (cmd == F_GETLK) {
+			rc = 0;
+			posix_test_lock(filp, fl);
+		} else {
+			rc = posix_lock_file(filp, fl, NULL);
+		}
+	}
+
+	return rc;
+}
+
+static int orangefs_flush(struct file *file, fl_owner_t id)
+{
+	/*
+	 * This is vfs_fsync_range(file, 0, LLONG_MAX, 0) without the
+	 * service_operation in orangefs_fsync.
+	 *
+	 * Do not send fsync to OrangeFS server on a close.  Do send fsync
+	 * on an explicit fsync call.  This duplicates historical OrangeFS
+	 * behavior.
+	 */
+	int r;
+
+	r = filemap_write_and_wait_range(file->f_mapping, 0, LLONG_MAX);
+	if (r > 0)
+		return 0;
+	else
+		return r;
+}
+
+/** ORANGEFS implementation of VFS file operations */
+const struct file_operations orangefs_file_operations = {
+	.llseek		= orangefs_file_llseek,
+	.read_iter	= orangefs_file_read_iter,
+	.write_iter	= orangefs_file_write_iter,
+	.lock		= orangefs_lock,
+	.mmap_prepare	= orangefs_file_mmap_prepare,
+	.open		= generic_file_open,
+	.splice_read    = orangefs_file_splice_read,
+	.splice_write   = iter_file_splice_write,
+	.flush		= orangefs_flush,
+	.release	= orangefs_file_release,
+	.fsync		= orangefs_fsync,
+	.setlease	= generic_setlease,
+};

linux-7.2.3/fs/orangefs/namei.c

@@ -0,0 +1,432 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ *
+ * See COPYING in top-level directory.
+ */
+
+/*
+ *  Linux VFS namei operations.
+ */
+
+#include "protocol.h"
+#include "orangefs-kernel.h"
+
+/*
+ * Get a newly allocated inode to go with a negative dentry.
+ */
+static int orangefs_create(struct mnt_idmap *idmap,
+			struct inode *dir,
+			struct dentry *dentry,
+			umode_t mode,
+			bool exclusive)
+{
+	struct orangefs_inode_s *parent = ORANGEFS_I(dir);
+	struct orangefs_kernel_op_s *new_op;
+	struct orangefs_object_kref ref;
+	struct inode *inode;
+	struct iattr iattr;
+	int ret;
+
+	gossip_debug(GOSSIP_NAME_DEBUG, "%s: %pd\n",
+		     __func__,
+		     dentry);
+
+	new_op = op_alloc(ORANGEFS_VFS_OP_CREATE);
+	if (!new_op)
+		return -ENOMEM;
+
+	new_op->upcall.req.create.parent_refn = parent->refn;
+
+	fill_default_sys_attrs(new_op->upcall.req.create.attributes, mode);
+
+	strscpy(new_op->upcall.req.create.d_name, dentry->d_name.name);
+
+	ret = service_operation(new_op, __func__, get_interruptible_flag(dir));
+
+	gossip_debug(GOSSIP_NAME_DEBUG,
+		     "%s: %pd: handle:%pU: fsid:%d: new_op:%p: ret:%d:\n",
+		     __func__,
+		     dentry,
+		     &new_op->downcall.resp.create.refn.khandle,
+		     new_op->downcall.resp.create.refn.fs_id,
+		     new_op,
+		     ret);
+
+	if (ret < 0)
+		goto out;
+
+	ref = new_op->downcall.resp.create.refn;
+
+	inode = orangefs_new_inode(dir->i_sb, dir, S_IFREG | mode, 0, &ref);
+	if (IS_ERR(inode)) {
+		gossip_err("%s: Failed to allocate inode for file :%pd:\n",
+			   __func__,
+			   dentry);
+		ret = PTR_ERR(inode);
+		goto out;
+	}
+
+	gossip_debug(GOSSIP_NAME_DEBUG,
+		     "%s: Assigned inode :%pU: for file :%pd:\n",
+		     __func__,
+		     get_khandle_from_ino(inode),
+		     dentry);
+
+	d_instantiate_new(dentry, inode);
+	orangefs_set_timeout(dentry);
+
+	gossip_debug(GOSSIP_NAME_DEBUG,
+		     "%s: dentry instantiated for %pd\n",
+		     __func__,
+		     dentry);
+
+	memset(&iattr, 0, sizeof iattr);
+	iattr.ia_valid |= ATTR_MTIME | ATTR_CTIME;
+	iattr.ia_mtime = iattr.ia_ctime = current_time(dir);
+	__orangefs_setattr(dir, &iattr);
+	ret = 0;
+out:
+	op_release(new_op);
+	gossip_debug(GOSSIP_NAME_DEBUG,
+		     "%s: %pd: returning %d\n",
+		     __func__,
+		     dentry,
+		     ret);
+	return ret;
+}
+
+/*
+ * Attempt to resolve an object name (dentry->d_name), parent handle, and
+ * fsid into a handle for the object.
+ */
+static struct dentry *orangefs_lookup(struct inode *dir, struct dentry *dentry,
+				   unsigned int flags)
+{
+	struct orangefs_inode_s *parent = ORANGEFS_I(dir);
+	struct orangefs_kernel_op_s *new_op;
+	struct inode *inode;
+	int ret = -EINVAL;
+
+	/*
+	 * in theory we could skip a lookup here (if the intent is to
+	 * create) in order to avoid a potentially failed lookup, but
+	 * leaving it in can skip a valid lookup and try to create a file
+	 * that already exists (e.g. the vfs already handles checking for
+	 * -EEXIST on O_EXCL opens, which is broken if we skip this lookup
+	 * in the create path)
+	 */
+	gossip_debug(GOSSIP_NAME_DEBUG, "%s called on %pd\n",
+		     __func__, dentry);
+
+	if (dentry->d_name.len > (ORANGEFS_NAME_MAX - 1))
+		return ERR_PTR(-ENAMETOOLONG);
+
+	new_op = op_alloc(ORANGEFS_VFS_OP_LOOKUP);
+	if (!new_op)
+		return ERR_PTR(-ENOMEM);
+
+	new_op->upcall.req.lookup.sym_follow = ORANGEFS_LOOKUP_LINK_NO_FOLLOW;
+
+	gossip_debug(GOSSIP_NAME_DEBUG, "%s:%s:%d using parent %pU\n",
+		     __FILE__,
+		     __func__,
+		     __LINE__,
+		     &parent->refn.khandle);
+	new_op->upcall.req.lookup.parent_refn = parent->refn;
+
+	strscpy(new_op->upcall.req.lookup.d_name, dentry->d_name.name);
+
+	gossip_debug(GOSSIP_NAME_DEBUG,
+		     "%s: doing lookup on %s under %pU,%d\n",
+		     __func__,
+		     new_op->upcall.req.lookup.d_name,
+		     &new_op->upcall.req.lookup.parent_refn.khandle,
+		     new_op->upcall.req.lookup.parent_refn.fs_id);
+
+	ret = service_operation(new_op, __func__, get_interruptible_flag(dir));
+
+	gossip_debug(GOSSIP_NAME_DEBUG,
+		     "Lookup Got %pU, fsid %d (ret=%d)\n",
+		     &new_op->downcall.resp.lookup.refn.khandle,
+		     new_op->downcall.resp.lookup.refn.fs_id,
+		     ret);
+
+	if (ret == 0) {
+		orangefs_set_timeout(dentry);
+		inode = orangefs_iget(dir->i_sb, &new_op->downcall.resp.lookup.refn);
+	} else if (ret == -ENOENT) {
+		inode = NULL;
+	} else {
+		/* must be a non-recoverable error */
+		inode = ERR_PTR(ret);
+	}
+
+	op_release(new_op);
+	return d_splice_alias(inode, dentry);
+}
+
+/* return 0 on success; non-zero otherwise */
+static int orangefs_unlink(struct inode *dir, struct dentry *dentry)
+{
+	struct inode *inode = dentry->d_inode;
+	struct orangefs_inode_s *parent = ORANGEFS_I(dir);
+	struct orangefs_kernel_op_s *new_op;
+	struct iattr iattr;
+	int ret;
+
+	gossip_debug(GOSSIP_NAME_DEBUG,
+		     "%s: called on %pd\n"
+		     "  (inode %pU): Parent is %pU | fs_id %d\n",
+		     __func__,
+		     dentry,
+		     get_khandle_from_ino(inode),
+		     &parent->refn.khandle,
+		     parent->refn.fs_id);
+
+	new_op = op_alloc(ORANGEFS_VFS_OP_REMOVE);
+	if (!new_op)
+		return -ENOMEM;
+
+	new_op->upcall.req.remove.parent_refn = parent->refn;
+	strscpy(new_op->upcall.req.remove.d_name, dentry->d_name.name);
+
+	ret = service_operation(new_op, "orangefs_unlink",
+				get_interruptible_flag(inode));
+
+	gossip_debug(GOSSIP_NAME_DEBUG,
+		     "%s: service_operation returned:%d:\n",
+		     __func__,
+		     ret);
+
+	op_release(new_op);
+
+	if (!ret) {
+		drop_nlink(inode);
+
+		memset(&iattr, 0, sizeof iattr);
+		iattr.ia_valid |= ATTR_MTIME | ATTR_CTIME;
+		iattr.ia_mtime = iattr.ia_ctime = current_time(dir);
+		__orangefs_setattr(dir, &iattr);
+	}
+	return ret;
+}
+
+static int orangefs_symlink(struct mnt_idmap *idmap,
+		         struct inode *dir,
+			 struct dentry *dentry,
+			 const char *symname)
+{
+	struct orangefs_inode_s *parent = ORANGEFS_I(dir);
+	struct orangefs_kernel_op_s *new_op;
+	struct orangefs_object_kref ref;
+	struct inode *inode;
+	struct iattr iattr;
+	int mode = 0755;
+	int ret;
+
+	gossip_debug(GOSSIP_NAME_DEBUG, "%s: called\n", __func__);
+
+	if (!symname)
+		return -EINVAL;
+
+	if (strlen(symname)+1 > ORANGEFS_NAME_MAX)
+		return -ENAMETOOLONG;
+
+	new_op = op_alloc(ORANGEFS_VFS_OP_SYMLINK);
+	if (!new_op)
+		return -ENOMEM;
+
+	new_op->upcall.req.sym.parent_refn = parent->refn;
+
+	fill_default_sys_attrs(new_op->upcall.req.sym.attributes, mode);
+
+	strscpy(new_op->upcall.req.sym.entry_name, dentry->d_name.name);
+	strscpy(new_op->upcall.req.sym.target, symname);
+
+	ret = service_operation(new_op, __func__, get_interruptible_flag(dir));
+
+	gossip_debug(GOSSIP_NAME_DEBUG,
+		     "Symlink Got ORANGEFS handle %pU on fsid %d (ret=%d)\n",
+		     &new_op->downcall.resp.sym.refn.khandle,
+		     new_op->downcall.resp.sym.refn.fs_id, ret);
+
+	if (ret < 0) {
+		gossip_debug(GOSSIP_NAME_DEBUG,
+			    "%s: failed with error code %d\n",
+			    __func__, ret);
+		goto out;
+	}
+
+	ref = new_op->downcall.resp.sym.refn;
+
+	inode = orangefs_new_inode(dir->i_sb, dir, S_IFLNK | mode, 0, &ref);
+	if (IS_ERR(inode)) {
+		gossip_err
+		    ("*** Failed to allocate orangefs symlink inode\n");
+		ret = PTR_ERR(inode);
+		goto out;
+	}
+	/*
+	 * This is necessary because orangefs_inode_getattr will not
+	 * re-read symlink size as it is impossible for it to change.
+	 * Invalidating the cache does not help.  orangefs_new_inode
+	 * does not set the correct size (it does not know symname).
+	 */
+	inode->i_size = strlen(symname);
+
+	gossip_debug(GOSSIP_NAME_DEBUG,
+		     "Assigned symlink inode new number of %pU\n",
+		     get_khandle_from_ino(inode));
+
+	d_instantiate_new(dentry, inode);
+	orangefs_set_timeout(dentry);
+
+	gossip_debug(GOSSIP_NAME_DEBUG,
+		     "Inode (Symlink) %pU -> %pd\n",
+		     get_khandle_from_ino(inode),
+		     dentry);
+
+	memset(&iattr, 0, sizeof iattr);
+	iattr.ia_valid |= ATTR_MTIME | ATTR_CTIME;
+	iattr.ia_mtime = iattr.ia_ctime = current_time(dir);
+	__orangefs_setattr(dir, &iattr);
+	ret = 0;
+out:
+	op_release(new_op);
+	return ret;
+}
+
+static struct dentry *orangefs_mkdir(struct mnt_idmap *idmap, struct inode *dir,
+				     struct dentry *dentry, umode_t mode)
+{
+	struct orangefs_inode_s *parent = ORANGEFS_I(dir);
+	struct orangefs_kernel_op_s *new_op;
+	struct orangefs_object_kref ref;
+	struct inode *inode;
+	struct iattr iattr;
+	int ret;
+
+	new_op = op_alloc(ORANGEFS_VFS_OP_MKDIR);
+	if (!new_op)
+		return ERR_PTR(-ENOMEM);
+
+	new_op->upcall.req.mkdir.parent_refn = parent->refn;
+
+	fill_default_sys_attrs(new_op->upcall.req.mkdir.attributes, mode);
+
+	strscpy(new_op->upcall.req.mkdir.d_name, dentry->d_name.name);
+
+	ret = service_operation(new_op, __func__, get_interruptible_flag(dir));
+
+	gossip_debug(GOSSIP_NAME_DEBUG,
+		     "Mkdir Got ORANGEFS handle %pU on fsid %d\n",
+		     &new_op->downcall.resp.mkdir.refn.khandle,
+		     new_op->downcall.resp.mkdir.refn.fs_id);
+
+	if (ret < 0) {
+		gossip_debug(GOSSIP_NAME_DEBUG,
+			     "%s: failed with error code %d\n",
+			     __func__, ret);
+		goto out;
+	}
+
+	ref = new_op->downcall.resp.mkdir.refn;
+
+	inode = orangefs_new_inode(dir->i_sb, dir, S_IFDIR | mode, 0, &ref);
+	if (IS_ERR(inode)) {
+		gossip_err("*** Failed to allocate orangefs dir inode\n");
+		ret = PTR_ERR(inode);
+		goto out;
+	}
+
+	gossip_debug(GOSSIP_NAME_DEBUG,
+		     "Assigned dir inode new number of %pU\n",
+		     get_khandle_from_ino(inode));
+
+	d_instantiate_new(dentry, inode);
+	orangefs_set_timeout(dentry);
+
+	gossip_debug(GOSSIP_NAME_DEBUG,
+		     "Inode (Directory) %pU -> %pd\n",
+		     get_khandle_from_ino(inode),
+		     dentry);
+
+	/*
+	 * NOTE: we have no good way to keep nlink consistent for directories
+	 * across clients; keep constant at 1.
+	 */
+	memset(&iattr, 0, sizeof iattr);
+	iattr.ia_valid |= ATTR_MTIME | ATTR_CTIME;
+	iattr.ia_mtime = iattr.ia_ctime = current_time(dir);
+	__orangefs_setattr(dir, &iattr);
+out:
+	op_release(new_op);
+	return ret ? ERR_PTR(ret) : NULL;
+}
+
+static int orangefs_rename(struct mnt_idmap *idmap,
+			struct inode *old_dir,
+			struct dentry *old_dentry,
+			struct inode *new_dir,
+			struct dentry *new_dentry,
+			unsigned int flags)
+{
+	struct orangefs_kernel_op_s *new_op;
+	struct iattr iattr;
+	int ret;
+
+	if (flags)
+		return -EINVAL;
+
+	gossip_debug(GOSSIP_NAME_DEBUG,
+		     "orangefs_rename: called (%pd2 => %pd2) ct=%d\n",
+		     old_dentry, new_dentry, d_count(new_dentry));
+
+	memset(&iattr, 0, sizeof iattr);
+	iattr.ia_valid |= ATTR_MTIME | ATTR_CTIME;
+	iattr.ia_mtime = iattr.ia_ctime = current_time(new_dir);
+	__orangefs_setattr(new_dir, &iattr);
+
+	new_op = op_alloc(ORANGEFS_VFS_OP_RENAME);
+	if (!new_op)
+		return -EINVAL;
+
+	new_op->upcall.req.rename.old_parent_refn = ORANGEFS_I(old_dir)->refn;
+	new_op->upcall.req.rename.new_parent_refn = ORANGEFS_I(new_dir)->refn;
+
+	strscpy(new_op->upcall.req.rename.d_old_name, old_dentry->d_name.name);
+	strscpy(new_op->upcall.req.rename.d_new_name, new_dentry->d_name.name);
+
+	ret = service_operation(new_op,
+				"orangefs_rename",
+				get_interruptible_flag(old_dentry->d_inode));
+
+	gossip_debug(GOSSIP_NAME_DEBUG,
+		     "orangefs_rename: got downcall status %d\n",
+		     ret);
+
+	if (new_dentry->d_inode)
+		inode_set_ctime_current(d_inode(new_dentry));
+
+	op_release(new_op);
+	return ret;
+}
+
+/* ORANGEFS implementation of VFS inode operations for directories */
+const struct inode_operations orangefs_dir_inode_operations = {
+	.lookup = orangefs_lookup,
+	.get_inode_acl = orangefs_get_acl,
+	.set_acl = orangefs_set_acl,
+	.create = orangefs_create,
+	.unlink = orangefs_unlink,
+	.symlink = orangefs_symlink,
+	.mkdir = orangefs_mkdir,
+	.rmdir = orangefs_unlink,
+	.rename = orangefs_rename,
+	.setattr = orangefs_setattr,
+	.getattr = orangefs_getattr,
+	.listxattr = orangefs_listxattr,
+	.permission = orangefs_permission,
+	.update_time = orangefs_update_time,
+};

linux-7.2.3/fs/orangefs/orangefs-bufmap.c

@@ -0,0 +1,836 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ *
+ * See COPYING in top-level directory.
+ */
+#include "protocol.h"
+#include "orangefs-kernel.h"
+#include "orangefs-bufmap.h"
+
+struct slot_map {
+	int c;
+	wait_queue_head_t q;
+	int count;
+	unsigned long *map;
+};
+
+static struct slot_map rw_map = {
+	.c = -1,
+	.q = __WAIT_QUEUE_HEAD_INITIALIZER(rw_map.q)
+};
+static struct slot_map readdir_map = {
+	.c = -1,
+	.q = __WAIT_QUEUE_HEAD_INITIALIZER(readdir_map.q)
+};
+
+
+static void install(struct slot_map *m, int count, unsigned long *map)
+{
+	spin_lock(&m->q.lock);
+	m->c = m->count = count;
+	m->map = map;
+	wake_up_all_locked(&m->q);
+	spin_unlock(&m->q.lock);
+}
+
+static void mark_killed(struct slot_map *m)
+{
+	spin_lock(&m->q.lock);
+	m->c -= m->count + 1;
+	spin_unlock(&m->q.lock);
+}
+
+static void run_down(struct slot_map *m)
+{
+	DEFINE_WAIT(wait);
+	spin_lock(&m->q.lock);
+	if (m->c != -1) {
+		for (;;) {
+			if (likely(list_empty(&wait.entry)))
+				__add_wait_queue_entry_tail(&m->q, &wait);
+			set_current_state(TASK_UNINTERRUPTIBLE);
+
+			if (m->c == -1)
+				break;
+
+			spin_unlock(&m->q.lock);
+			schedule();
+			spin_lock(&m->q.lock);
+		}
+		__remove_wait_queue(&m->q, &wait);
+		__set_current_state(TASK_RUNNING);
+	}
+	m->map = NULL;
+	spin_unlock(&m->q.lock);
+}
+
+static void put(struct slot_map *m, int slot)
+{
+	int v;
+	spin_lock(&m->q.lock);
+	__clear_bit(slot, m->map);
+	v = ++m->c;
+	if (v > 0)
+		wake_up_locked(&m->q);
+	if (unlikely(v == -1))     /* finished dying */
+		wake_up_all_locked(&m->q);
+	spin_unlock(&m->q.lock);
+}
+
+static int wait_for_free(struct slot_map *m)
+{
+	long left = slot_timeout_secs * HZ;
+	DEFINE_WAIT(wait);
+
+	do {
+		long n = left, t;
+		if (likely(list_empty(&wait.entry)))
+			__add_wait_queue_entry_tail_exclusive(&m->q, &wait);
+		set_current_state(TASK_INTERRUPTIBLE);
+
+		if (m->c > 0)
+			break;
+
+		if (m->c < 0) {
+			/* we are waiting for map to be installed */
+			/* it would better be there soon, or we go away */
+			if (n > ORANGEFS_BUFMAP_WAIT_TIMEOUT_SECS * HZ)
+				n = ORANGEFS_BUFMAP_WAIT_TIMEOUT_SECS * HZ;
+		}
+		spin_unlock(&m->q.lock);
+		t = schedule_timeout(n);
+		spin_lock(&m->q.lock);
+		if (unlikely(!t) && n != left && m->c < 0)
+			left = t;
+		else
+			left = t + (left - n);
+		if (signal_pending(current))
+			left = -EINTR;
+	} while (left > 0);
+
+	if (!list_empty(&wait.entry))
+		list_del(&wait.entry);
+	else if (left <= 0 && waitqueue_active(&m->q))
+		__wake_up_locked_key(&m->q, TASK_INTERRUPTIBLE, NULL);
+	__set_current_state(TASK_RUNNING);
+
+	if (likely(left > 0))
+		return 0;
+
+	return left < 0 ? -EINTR : -ETIMEDOUT;
+}
+
+static int get(struct slot_map *m)
+{
+	int res = 0;
+	spin_lock(&m->q.lock);
+	if (unlikely(m->c <= 0))
+		res = wait_for_free(m);
+	if (likely(!res)) {
+		m->c--;
+		res = find_first_zero_bit(m->map, m->count);
+		__set_bit(res, m->map);
+	}
+	spin_unlock(&m->q.lock);
+	return res;
+}
+
+/* used to describe mapped buffers */
+struct orangefs_bufmap_desc {
+	void __user *uaddr;		/* user space address pointer */
+	struct folio **folio_array;
+	/*
+	 * folio_offsets could be needed when userspace sets custom
+	 * sizes in user_desc, or when folios aren't all backed by
+	 * 2MB THPs.
+	 */
+	size_t *folio_offsets;
+	int folio_count;
+	bool is_two_2mib_chunks;
+};
+
+static struct orangefs_bufmap {
+	int desc_size;
+	int desc_shift;
+	int desc_count;
+	int total_size;
+	int page_count;
+	int folio_count;
+
+	struct page **page_array;
+	struct folio **folio_array;
+	struct orangefs_bufmap_desc *desc_array;
+
+	/* array to track usage of buffer descriptors */
+	unsigned long *buffer_index_array;
+
+	/* array to track usage of buffer descriptors for readdir */
+#define N DIV_ROUND_UP(ORANGEFS_READDIR_DEFAULT_DESC_COUNT, BITS_PER_LONG)
+	unsigned long readdir_index_array[N];
+#undef N
+} *__orangefs_bufmap;
+
+static DEFINE_SPINLOCK(orangefs_bufmap_lock);
+
+static void
+orangefs_bufmap_unmap(struct orangefs_bufmap *bufmap)
+{
+	unpin_user_pages(bufmap->page_array, bufmap->page_count);
+}
+
+static void
+orangefs_bufmap_free(struct orangefs_bufmap *bufmap)
+{
+	int i;
+
+	if (!bufmap)
+		return;
+
+	for (i = 0; i < bufmap->desc_count; i++) {
+		kfree(bufmap->desc_array[i].folio_array);
+		kfree(bufmap->desc_array[i].folio_offsets);
+		bufmap->desc_array[i].folio_array = NULL;
+		bufmap->desc_array[i].folio_offsets = NULL;
+	}
+	kfree(bufmap->page_array);
+	kfree(bufmap->desc_array);
+	bitmap_free(bufmap->buffer_index_array);
+	kfree(bufmap);
+}
+
+/*
+ * XXX: Can the size and shift change while the caller gives up the
+ * XXX: lock between calling this and doing something useful?
+ */
+
+int orangefs_bufmap_size_query(void)
+{
+	struct orangefs_bufmap *bufmap;
+	int size = 0;
+	spin_lock(&orangefs_bufmap_lock);
+	bufmap = __orangefs_bufmap;
+	if (bufmap)
+		size = bufmap->desc_size;
+	spin_unlock(&orangefs_bufmap_lock);
+	return size;
+}
+
+static DECLARE_WAIT_QUEUE_HEAD(bufmap_waitq);
+static DECLARE_WAIT_QUEUE_HEAD(readdir_waitq);
+
+static struct orangefs_bufmap *
+orangefs_bufmap_alloc(struct ORANGEFS_dev_map_desc *user_desc)
+{
+	struct orangefs_bufmap *bufmap;
+
+	bufmap = kzalloc_obj(*bufmap);
+	if (!bufmap)
+		goto out;
+
+	bufmap->total_size = user_desc->total_size;
+	bufmap->desc_count = user_desc->count;
+	bufmap->desc_size = user_desc->size;
+	bufmap->desc_shift = ilog2(bufmap->desc_size);
+	bufmap->page_count = bufmap->total_size / PAGE_SIZE;
+
+	bufmap->buffer_index_array =
+		bitmap_zalloc(bufmap->desc_count, GFP_KERNEL);
+	if (!bufmap->buffer_index_array)
+		goto out_free_bufmap;
+
+	bufmap->desc_array =
+		kzalloc_objs(struct orangefs_bufmap_desc, bufmap->desc_count);
+	if (!bufmap->desc_array)
+		goto out_free_index_array;
+
+	/* allocate storage to track our page mappings */
+	bufmap->page_array =
+		kzalloc_objs(struct page *, bufmap->page_count);
+	if (!bufmap->page_array)
+		goto out_free_desc_array;
+
+	/* allocate folio array. */
+	bufmap->folio_array = kzalloc_objs(struct folio *, bufmap->page_count);
+	if (!bufmap->folio_array)
+		goto out_free_page_array;
+
+	return bufmap;
+
+out_free_page_array:
+	kfree(bufmap->page_array);
+out_free_desc_array:
+	kfree(bufmap->desc_array);
+out_free_index_array:
+	bitmap_free(bufmap->buffer_index_array);
+out_free_bufmap:
+	kfree(bufmap);
+out:
+	return NULL;
+}
+
+static int orangefs_bufmap_group_folios(struct orangefs_bufmap *bufmap)
+{
+	int i = 0;
+	int f = 0;
+	int k;
+	int num_pages;
+	struct page *page;
+	struct folio *folio;
+
+	while (i < bufmap->page_count) {
+		page = bufmap->page_array[i];
+		folio = page_folio(page);
+		num_pages = folio_nr_pages(folio);
+		gossip_debug(GOSSIP_BUFMAP_DEBUG,
+			"%s: i:%d: num_pages:%d: \n", __func__, i, num_pages);
+
+		for (k = 1; k < num_pages; k++) {
+			if (bufmap->page_array[i + k] != folio_page(folio, k)) {
+				gossip_err("%s: bad match,  i:%d: k:%d:\n",
+					__func__, i, k);
+				return -EINVAL;
+			}
+		}
+
+		bufmap->folio_array[f++] = folio;
+		i += num_pages;
+	}
+
+	bufmap->folio_count = f;
+	pr_info("%s: Grouped %d folios from %d pages.\n",
+		__func__,
+		bufmap->folio_count,
+		bufmap->page_count);
+	return 0;
+}
+
+static int orangefs_bufmap_map(struct orangefs_bufmap *bufmap,
+				struct ORANGEFS_dev_map_desc *user_desc)
+{
+	int pages_per_desc = bufmap->desc_size / PAGE_SIZE;
+	int ret;
+	int i;
+	int j;
+	int current_folio;
+	int desc_pages_needed;
+	int desc_folio_count;
+	int remaining_pages;
+	int need_avail_min;
+	int pages_assigned_to_this_desc;
+	int allocated_descs = 0;
+	size_t current_offset;
+	size_t adjust_offset;
+	struct folio *folio;
+
+	/* map the pages */
+	ret = pin_user_pages_fast((unsigned long)user_desc->ptr,
+		bufmap->page_count,
+		FOLL_WRITE,
+		bufmap->page_array);
+
+	if (ret < 0)
+		return ret;
+
+	if (ret != bufmap->page_count) {
+		gossip_err("orangefs error: asked for %d pages, only got %d.\n",
+				bufmap->page_count, ret);
+		for (i = 0; i < ret; i++)
+			unpin_user_page(bufmap->page_array[i]);
+		return -ENOMEM;
+	}
+
+	/*
+	 * ideally we want to get kernel space pointers for each page, but
+	 * we can't kmap that many pages at once if highmem is being used.
+	 * so instead, we just kmap/kunmap the page address each time the
+	 * kaddr is needed.
+	 */
+	for (i = 0; i < bufmap->page_count; i++)
+		flush_dcache_page(bufmap->page_array[i]);
+
+	/*
+	 * Group pages into folios.
+	 */
+	ret = orangefs_bufmap_group_folios(bufmap);
+	if (ret)
+		goto unpin;
+
+	pr_info("%s: desc_size=%d bytes (%d pages per desc), total folios=%d\n",
+			__func__, bufmap->desc_size, pages_per_desc,
+			bufmap->folio_count);
+
+	current_folio = 0;
+	remaining_pages = 0;
+	current_offset = 0;
+	for (i = 0; i < bufmap->desc_count; i++) {
+		desc_pages_needed = pages_per_desc;
+		desc_folio_count = 0;
+		pages_assigned_to_this_desc = 0;
+		bufmap->desc_array[i].is_two_2mib_chunks = false;
+
+		/*
+		 * We hope there was enough memory that each desc is
+		 * covered by two THPs/folios, if not we want to keep on
+		 * working even if there's only one page per folio.
+		 */
+		bufmap->desc_array[i].folio_array =
+			kzalloc_objs(struct folio *, pages_per_desc);
+		if (!bufmap->desc_array[i].folio_array) {
+			ret = -ENOMEM;
+			goto unpin;
+		}
+
+		bufmap->desc_array[i].folio_offsets =
+			kzalloc_objs(size_t, pages_per_desc);
+		if (!bufmap->desc_array[i].folio_offsets) {
+			ret = -ENOMEM;
+			kfree(bufmap->desc_array[i].folio_array);
+			bufmap->desc_array[i].folio_array = NULL;
+			goto unpin;
+		}
+
+		bufmap->desc_array[i].uaddr =
+			user_desc->ptr + (size_t)i * bufmap->desc_size;
+
+		/*
+		 * Accumulate folios until desc is full.
+		 */
+		while (desc_pages_needed > 0) {
+			if (remaining_pages == 0) {
+				/* shouldn't happen. */
+				if (current_folio >= bufmap->folio_count) {
+					ret = -EINVAL;
+					goto unpin;
+				}
+				folio = bufmap->folio_array[current_folio++];
+				remaining_pages = folio_nr_pages(folio);
+				current_offset = 0;
+			} else {
+				folio = bufmap->folio_array[current_folio - 1];
+			}
+
+			need_avail_min =
+				min(desc_pages_needed, remaining_pages);
+			adjust_offset = need_avail_min * PAGE_SIZE;
+
+			bufmap->desc_array[i].folio_array[desc_folio_count] =
+				folio;
+			bufmap->desc_array[i].folio_offsets[desc_folio_count] =
+				current_offset;
+			desc_folio_count++;
+			pages_assigned_to_this_desc += need_avail_min;
+			desc_pages_needed -= need_avail_min;
+			remaining_pages -= need_avail_min;
+			current_offset += adjust_offset;
+		}
+
+		/* Detect optimal case: two 2MiB folios per 4MiB slot. */
+		if (desc_folio_count == 2 &&
+		  folio_nr_pages(bufmap->desc_array[i].folio_array[0]) == 512 &&
+		  folio_nr_pages(bufmap->desc_array[i].folio_array[1]) == 512) {
+			bufmap->desc_array[i].is_two_2mib_chunks = true;
+			gossip_debug(GOSSIP_BUFMAP_DEBUG, "%s: descriptor :%d: "
+				"optimal folio/page ratio.\n", __func__, i);
+		}
+
+		bufmap->desc_array[i].folio_count = desc_folio_count;
+		gossip_debug(GOSSIP_BUFMAP_DEBUG,
+			" descriptor %d: folio_count=%d, "
+			"pages_assigned=%d (should be %d)\n",
+			i, desc_folio_count, pages_assigned_to_this_desc,
+			pages_per_desc);
+
+		allocated_descs = i + 1;
+	}
+
+	return 0;
+unpin:
+	/*
+	 * rollback any allocations we got so far...
+	 * Memory pressure, like in generic/340, led me
+	 * to write the rollback this way.
+	 */
+	for (j = 0; j < allocated_descs; j++) {
+		if (bufmap->desc_array[j].folio_array) {
+			kfree(bufmap->desc_array[j].folio_array);
+			bufmap->desc_array[j].folio_array = NULL;
+		}
+		if (bufmap->desc_array[j].folio_offsets) {
+			kfree(bufmap->desc_array[j].folio_offsets);
+			bufmap->desc_array[j].folio_offsets = NULL;
+		}
+	}
+	unpin_user_pages(bufmap->page_array, bufmap->page_count);
+	return ret;
+}
+
+/*
+ * orangefs_bufmap_initialize()
+ *
+ * initializes the mapped buffer interface
+ *
+ * user_desc is the parameters provided by userspace for the bufmap.
+ *
+ * returns 0 on success, -errno on failure
+ */
+int orangefs_bufmap_initialize(struct ORANGEFS_dev_map_desc *user_desc)
+{
+	struct orangefs_bufmap *bufmap;
+	int ret = -EINVAL;
+
+	gossip_debug(GOSSIP_BUFMAP_DEBUG,
+		     "%s: called (ptr (" "%p) sz (%d) cnt(%d).\n",
+		     __func__,
+		     user_desc->ptr,
+		     user_desc->size,
+		     user_desc->count);
+
+	if (user_desc->total_size < 0 ||
+	    user_desc->size < 0 ||
+	    user_desc->count < 0)
+		goto out;
+
+	/*
+	 * sanity check alignment and size of buffer that caller wants to
+	 * work with
+	 */
+	if (PAGE_ALIGN((unsigned long)user_desc->ptr) !=
+	    (unsigned long)user_desc->ptr) {
+		gossip_err("orangefs error: memory alignment (front). %p\n",
+			   user_desc->ptr);
+		goto out;
+	}
+
+	if (PAGE_ALIGN(((unsigned long)user_desc->ptr + user_desc->total_size))
+	    != (unsigned long)(user_desc->ptr + user_desc->total_size)) {
+		gossip_err("orangefs error: memory alignment (back).(%p + %d)\n",
+			   user_desc->ptr,
+			   user_desc->total_size);
+		goto out;
+	}
+
+	if (user_desc->total_size != (user_desc->size * user_desc->count)) {
+		gossip_err("orangefs error: user provided an oddly sized buffer: (%d, %d, %d)\n",
+			   user_desc->total_size,
+			   user_desc->size,
+			   user_desc->count);
+		goto out;
+	}
+
+	if ((user_desc->size % PAGE_SIZE) != 0) {
+		gossip_err("orangefs error: bufmap size not page size divisible (%d).\n",
+			   user_desc->size);
+		goto out;
+	}
+
+	ret = -ENOMEM;
+	bufmap = orangefs_bufmap_alloc(user_desc);
+	if (!bufmap)
+		goto out;
+
+	ret = orangefs_bufmap_map(bufmap, user_desc);
+	if (ret)
+		goto out_free_bufmap;
+
+
+	spin_lock(&orangefs_bufmap_lock);
+	if (__orangefs_bufmap) {
+		spin_unlock(&orangefs_bufmap_lock);
+		gossip_err("orangefs: error: bufmap already initialized.\n");
+		ret = -EINVAL;
+		goto out_unmap_bufmap;
+	}
+	__orangefs_bufmap = bufmap;
+	install(&rw_map,
+		bufmap->desc_count,
+		bufmap->buffer_index_array);
+	install(&readdir_map,
+		ORANGEFS_READDIR_DEFAULT_DESC_COUNT,
+		bufmap->readdir_index_array);
+	spin_unlock(&orangefs_bufmap_lock);
+
+	gossip_debug(GOSSIP_BUFMAP_DEBUG,
+		     "%s: exiting normally\n", __func__);
+	return 0;
+
+out_unmap_bufmap:
+	orangefs_bufmap_unmap(bufmap);
+out_free_bufmap:
+	orangefs_bufmap_free(bufmap);
+out:
+	return ret;
+}
+
+/*
+ * orangefs_bufmap_finalize()
+ *
+ * shuts down the mapped buffer interface and releases any resources
+ * associated with it
+ *
+ * no return value
+ */
+void orangefs_bufmap_finalize(void)
+{
+	struct orangefs_bufmap *bufmap = __orangefs_bufmap;
+	if (!bufmap)
+		return;
+	gossip_debug(GOSSIP_BUFMAP_DEBUG, "orangefs_bufmap_finalize: called\n");
+	mark_killed(&rw_map);
+	mark_killed(&readdir_map);
+	gossip_debug(GOSSIP_BUFMAP_DEBUG,
+		     "orangefs_bufmap_finalize: exiting normally\n");
+}
+
+void orangefs_bufmap_run_down(void)
+{
+	struct orangefs_bufmap *bufmap = __orangefs_bufmap;
+	if (!bufmap)
+		return;
+	run_down(&rw_map);
+	run_down(&readdir_map);
+	spin_lock(&orangefs_bufmap_lock);
+	__orangefs_bufmap = NULL;
+	spin_unlock(&orangefs_bufmap_lock);
+	orangefs_bufmap_unmap(bufmap);
+	orangefs_bufmap_free(bufmap);
+}
+
+/*
+ * orangefs_bufmap_get()
+ *
+ * gets a free mapped buffer descriptor, will sleep until one becomes
+ * available if necessary
+ *
+ * returns slot on success, -errno on failure
+ */
+int orangefs_bufmap_get(void)
+{
+	return get(&rw_map);
+}
+
+/*
+ * orangefs_bufmap_put()
+ *
+ * returns a mapped buffer descriptor to the collection
+ *
+ * no return value
+ */
+void orangefs_bufmap_put(int buffer_index)
+{
+	put(&rw_map, buffer_index);
+}
+
+/*
+ * orangefs_readdir_index_get()
+ *
+ * gets a free descriptor, will sleep until one becomes
+ * available if necessary.
+ * Although the readdir buffers are not mapped into kernel space
+ * we could do that at a later point of time. Regardless, these
+ * indices are used by the client-core.
+ *
+ * returns slot on success, -errno on failure
+ */
+int orangefs_readdir_index_get(void)
+{
+	return get(&readdir_map);
+}
+
+void orangefs_readdir_index_put(int buffer_index)
+{
+	put(&readdir_map, buffer_index);
+}
+
+/*
+ * we've been handed an iovec, we need to copy it to
+ * the shared memory descriptor at "buffer_index".
+ */
+int orangefs_bufmap_copy_from_iovec(struct iov_iter *iter,
+				int buffer_index,
+				size_t size)
+{
+	struct orangefs_bufmap_desc *to;
+	size_t remaining = size;
+	int folio_index = 0;
+	struct folio *folio;
+	size_t folio_offset;
+	size_t folio_avail;
+	size_t copy_amount;
+	size_t copied;
+	void *kaddr;
+	size_t half;
+	size_t first;
+	size_t second;
+
+	to = &__orangefs_bufmap->desc_array[buffer_index];
+
+	/* shouldn't happen... */
+	if (size > 4194304)
+		pr_info("%s: size:%zu\n", __func__, size);
+
+	gossip_debug(GOSSIP_BUFMAP_DEBUG,
+		"%s: buffer_index:%d size:%zu folio_count:%d\n",
+		__func__,
+		buffer_index,
+		size,
+		to->folio_count);
+
+	/* Fast path: exactly two 2 MiB folios */
+	if (to->is_two_2mib_chunks && size <= 4194304) {
+		gossip_debug(GOSSIP_BUFMAP_DEBUG,
+			"%s: fastpath hit.\n", __func__);
+		half = 2097152;		/* 2 MiB */
+		first = min(size, half);
+		second = (size > half) ? size - half : 0;
+
+		/* First 2 MiB chunk */
+		kaddr = kmap_local_folio(to->folio_array[0], 0);
+		copied = copy_from_iter(kaddr, first, iter);
+		kunmap_local(kaddr);
+		if (copied != first)
+			return -EFAULT;
+
+		if (second == 0)
+			return 0;
+
+		/* Second 2 MiB chunk */
+		kaddr = kmap_local_folio(to->folio_array[1], 0);
+		copied = copy_from_iter(kaddr, second, iter);
+		kunmap_local(kaddr);
+		if (copied != second)
+			return -EFAULT;
+
+		return 0;
+	}
+
+	while (remaining > 0) {
+
+		if (unlikely(folio_index >= to->folio_count ||
+			to->folio_array[folio_index] == NULL)) {
+				gossip_err("%s: "
+				   "folio_index:%d: >= folio_count:%d: "
+		                   "(size %zu, buffer %d)\n",
+					__func__,
+					folio_index,
+					to->folio_count,
+					size,
+					buffer_index);
+				return -EFAULT;
+		}
+
+		folio = to->folio_array[folio_index];
+		folio_offset = to->folio_offsets[folio_index];
+		folio_avail = folio_nr_pages(folio) * PAGE_SIZE - folio_offset;
+		copy_amount = min(remaining, folio_avail);
+		kaddr = kmap_local_folio(folio, folio_offset);
+		copied = copy_from_iter(kaddr, copy_amount, iter);
+		kunmap_local(kaddr);
+
+		if (copied != copy_amount)
+			return -EFAULT;
+
+		remaining -= copied;
+		folio_index++;
+	}
+
+	return 0;
+}
+
+/*
+ * we've been handed an iovec, we need to fill it from
+ * the shared memory descriptor at "buffer_index".
+ */
+int orangefs_bufmap_copy_to_iovec(struct iov_iter *iter,
+				    int buffer_index,
+				    size_t size)
+{
+	struct orangefs_bufmap_desc *from;
+	size_t remaining = size;
+	int folio_index = 0;
+	struct folio *folio;
+	size_t folio_offset;
+	size_t folio_avail;
+	size_t copy_amount;
+	size_t copied;
+	void *kaddr;
+	size_t half;
+	size_t first;
+	size_t second;
+
+	from = &__orangefs_bufmap->desc_array[buffer_index];
+
+	/* shouldn't happen... */
+	if (size > 4194304)
+		pr_info("%s: size:%zu\n", __func__, size);
+
+	gossip_debug(GOSSIP_BUFMAP_DEBUG,
+		"%s: buffer_index:%d size:%zu folio_count:%d\n",
+		__func__,
+		buffer_index,
+		size,
+		from->folio_count);
+
+	/* Fast path: exactly two 2 MiB folios */
+	if (from->is_two_2mib_chunks && size <= 4194304) {
+		gossip_debug(GOSSIP_BUFMAP_DEBUG,
+			"%s: fastpath hit.\n", __func__);
+		half = 2097152;		/* 2 MiB */
+		first = min(size, half);
+		second = (size > half) ? size - half : 0;
+		void *kaddr;
+		size_t copied;
+
+		/* First 2 MiB chunk */
+		kaddr = kmap_local_folio(from->folio_array[0], 0);
+		copied = copy_to_iter(kaddr, first, iter);
+		kunmap_local(kaddr);
+		if (copied != first)
+			return -EFAULT;
+
+		if (second == 0)
+			return 0;
+
+		/* Second 2 MiB chunk */
+		kaddr = kmap_local_folio(from->folio_array[1], 0);
+		copied = copy_to_iter(kaddr, second, iter);
+		kunmap_local(kaddr);
+		if (copied != second)
+			return -EFAULT;
+
+		return 0;
+	}
+
+	while (remaining > 0) {
+
+		if (unlikely(folio_index >= from->folio_count ||
+			from->folio_array[folio_index] == NULL)) {
+				gossip_err("%s: "
+				   "folio_index:%d: >= folio_count:%d: "
+		                   "(size %zu, buffer %d)\n",
+					__func__,
+					folio_index,
+					from->folio_count,
+					size,
+					buffer_index);
+				return -EFAULT;
+		}
+
+		folio = from->folio_array[folio_index];
+		folio_offset = from->folio_offsets[folio_index];
+		folio_avail = folio_nr_pages(folio) * PAGE_SIZE - folio_offset;
+		copy_amount = min(remaining, folio_avail);
+
+		kaddr = kmap_local_folio(folio, folio_offset);
+		copied = copy_to_iter(kaddr, copy_amount, iter);
+		kunmap_local(kaddr);
+
+		if (copied != copy_amount)
+			return -EFAULT;
+
+		remaining -= copied;
+		folio_index++;
+	}
+
+	return 0;
+}

linux-7.2.3/fs/orangefs/orangefs-bufmap.h

@@ -0,0 +1,36 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ *
+ * See COPYING in top-level directory.
+ */
+
+#ifndef __ORANGEFS_BUFMAP_H
+#define __ORANGEFS_BUFMAP_H
+
+int orangefs_bufmap_size_query(void);
+
+int orangefs_bufmap_initialize(struct ORANGEFS_dev_map_desc *user_desc);
+
+void orangefs_bufmap_finalize(void);
+
+void orangefs_bufmap_run_down(void);
+
+int orangefs_bufmap_get(void);
+
+void orangefs_bufmap_put(int buffer_index);
+
+int orangefs_readdir_index_get(void);
+
+void orangefs_readdir_index_put(int buffer_index);
+
+int orangefs_bufmap_copy_from_iovec(struct iov_iter *iter,
+				int buffer_index,
+				size_t size);
+
+int orangefs_bufmap_copy_to_iovec(struct iov_iter *iter,
+			      int buffer_index,
+			      size_t size);
+
+
+#endif /* __ORANGEFS_BUFMAP_H */

linux-7.2.3/fs/orangefs/orangefs-cache.c

@@ -0,0 +1,168 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ *
+ * See COPYING in top-level directory.
+ */
+
+#include "protocol.h"
+#include "orangefs-kernel.h"
+
+/* tags assigned to kernel upcall operations */
+static __u64 next_tag_value;
+static DEFINE_SPINLOCK(next_tag_value_lock);
+
+/* the orangefs memory caches */
+
+/* a cache for orangefs upcall/downcall operations */
+static struct kmem_cache *op_cache;
+
+int op_cache_initialize(void)
+{
+	op_cache = kmem_cache_create_usercopy("orangefs_op_cache",
+				     sizeof(struct orangefs_kernel_op_s),
+				     0,
+				     0,
+					 offsetof(struct orangefs_kernel_op_s, tag),
+					 offsetof(struct orangefs_kernel_op_s, upcall) +
+					     sizeof(struct orangefs_upcall_s) -
+						 offsetof(struct orangefs_kernel_op_s, tag),
+				     NULL);
+
+	if (!op_cache) {
+		gossip_err("Cannot create orangefs_op_cache\n");
+		return -ENOMEM;
+	}
+
+	/* initialize our atomic tag counter */
+	spin_lock(&next_tag_value_lock);
+	next_tag_value = 100;
+	spin_unlock(&next_tag_value_lock);
+	return 0;
+}
+
+int op_cache_finalize(void)
+{
+	kmem_cache_destroy(op_cache);
+	return 0;
+}
+
+char *get_opname_string(struct orangefs_kernel_op_s *new_op)
+{
+	if (new_op) {
+		__s32 type = new_op->upcall.type;
+
+		if (type == ORANGEFS_VFS_OP_FILE_IO)
+			return "OP_FILE_IO";
+		else if (type == ORANGEFS_VFS_OP_LOOKUP)
+			return "OP_LOOKUP";
+		else if (type == ORANGEFS_VFS_OP_CREATE)
+			return "OP_CREATE";
+		else if (type == ORANGEFS_VFS_OP_GETATTR)
+			return "OP_GETATTR";
+		else if (type == ORANGEFS_VFS_OP_REMOVE)
+			return "OP_REMOVE";
+		else if (type == ORANGEFS_VFS_OP_MKDIR)
+			return "OP_MKDIR";
+		else if (type == ORANGEFS_VFS_OP_READDIR)
+			return "OP_READDIR";
+		else if (type == ORANGEFS_VFS_OP_READDIRPLUS)
+			return "OP_READDIRPLUS";
+		else if (type == ORANGEFS_VFS_OP_SETATTR)
+			return "OP_SETATTR";
+		else if (type == ORANGEFS_VFS_OP_SYMLINK)
+			return "OP_SYMLINK";
+		else if (type == ORANGEFS_VFS_OP_RENAME)
+			return "OP_RENAME";
+		else if (type == ORANGEFS_VFS_OP_STATFS)
+			return "OP_STATFS";
+		else if (type == ORANGEFS_VFS_OP_TRUNCATE)
+			return "OP_TRUNCATE";
+		else if (type == ORANGEFS_VFS_OP_RA_FLUSH)
+			return "OP_RA_FLUSH";
+		else if (type == ORANGEFS_VFS_OP_FS_MOUNT)
+			return "OP_FS_MOUNT";
+		else if (type == ORANGEFS_VFS_OP_FS_UMOUNT)
+			return "OP_FS_UMOUNT";
+		else if (type == ORANGEFS_VFS_OP_GETXATTR)
+			return "OP_GETXATTR";
+		else if (type == ORANGEFS_VFS_OP_SETXATTR)
+			return "OP_SETXATTR";
+		else if (type == ORANGEFS_VFS_OP_LISTXATTR)
+			return "OP_LISTXATTR";
+		else if (type == ORANGEFS_VFS_OP_REMOVEXATTR)
+			return "OP_REMOVEXATTR";
+		else if (type == ORANGEFS_VFS_OP_PARAM)
+			return "OP_PARAM";
+		else if (type == ORANGEFS_VFS_OP_PERF_COUNT)
+			return "OP_PERF_COUNT";
+		else if (type == ORANGEFS_VFS_OP_CANCEL)
+			return "OP_CANCEL";
+		else if (type == ORANGEFS_VFS_OP_FSYNC)
+			return "OP_FSYNC";
+		else if (type == ORANGEFS_VFS_OP_FSKEY)
+			return "OP_FSKEY";
+		else if (type == ORANGEFS_VFS_OP_FEATURES)
+			return "OP_FEATURES";
+	}
+	return "OP_UNKNOWN?";
+}
+
+void orangefs_new_tag(struct orangefs_kernel_op_s *op)
+{
+	spin_lock(&next_tag_value_lock);
+	op->tag = next_tag_value++;
+	if (next_tag_value == 0)
+		next_tag_value = 100;
+	spin_unlock(&next_tag_value_lock);
+}
+
+struct orangefs_kernel_op_s *op_alloc(__s32 type)
+{
+	struct orangefs_kernel_op_s *new_op = NULL;
+
+	new_op = kmem_cache_zalloc(op_cache, GFP_KERNEL);
+	if (new_op) {
+		INIT_LIST_HEAD(&new_op->list);
+		spin_lock_init(&new_op->lock);
+		init_completion(&new_op->waitq);
+
+		new_op->upcall.type = ORANGEFS_VFS_OP_INVALID;
+		new_op->downcall.type = ORANGEFS_VFS_OP_INVALID;
+		new_op->downcall.status = -1;
+
+		new_op->op_state = OP_VFS_STATE_UNKNOWN;
+
+		/* initialize the op specific tag and upcall credentials */
+		orangefs_new_tag(new_op);
+		new_op->upcall.type = type;
+		new_op->attempts = 0;
+		gossip_debug(GOSSIP_CACHE_DEBUG,
+			     "Alloced OP (%p: %llu %s)\n",
+			     new_op,
+			     llu(new_op->tag),
+			     get_opname_string(new_op));
+
+		new_op->upcall.uid = from_kuid(&init_user_ns,
+					       current_fsuid());
+
+		new_op->upcall.gid = from_kgid(&init_user_ns,
+					       current_fsgid());
+	} else {
+		gossip_err("op_alloc: kmem_cache_zalloc failed!\n");
+	}
+	return new_op;
+}
+
+void op_release(struct orangefs_kernel_op_s *orangefs_op)
+{
+	if (orangefs_op) {
+		gossip_debug(GOSSIP_CACHE_DEBUG,
+			     "Releasing OP (%p: %llu)\n",
+			     orangefs_op,
+			     llu(orangefs_op->tag));
+		kmem_cache_free(op_cache, orangefs_op);
+	} else {
+		gossip_err("NULL pointer in op_release\n");
+	}
+}

linux-7.2.3/fs/orangefs/orangefs-debug.h

@@ -0,0 +1,46 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ *
+ * See COPYING in top-level directory.
+ */
+
+/* This file just defines debugging masks to be used with the gossip
+ * logging utility.  All debugging masks for ORANGEFS are kept here to make
+ * sure we don't have collisions.
+ */
+
+#ifndef __ORANGEFS_DEBUG_H
+#define __ORANGEFS_DEBUG_H
+
+#ifdef __KERNEL__
+#include <linux/types.h>
+#include <linux/kernel.h>
+#else
+#include <stdint.h>
+#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
+#endif
+
+#define	GOSSIP_NO_DEBUG			(__u64)0
+
+#define GOSSIP_SUPER_DEBUG		((__u64)1 << 0)
+#define GOSSIP_INODE_DEBUG		((__u64)1 << 1)
+#define GOSSIP_FILE_DEBUG		((__u64)1 << 2)
+#define GOSSIP_DIR_DEBUG		((__u64)1 << 3)
+#define GOSSIP_UTILS_DEBUG		((__u64)1 << 4)
+#define GOSSIP_WAIT_DEBUG		((__u64)1 << 5)
+#define GOSSIP_ACL_DEBUG		((__u64)1 << 6)
+#define GOSSIP_DCACHE_DEBUG		((__u64)1 << 7)
+#define GOSSIP_DEV_DEBUG		((__u64)1 << 8)
+#define GOSSIP_NAME_DEBUG		((__u64)1 << 9)
+#define GOSSIP_BUFMAP_DEBUG		((__u64)1 << 10)
+#define GOSSIP_CACHE_DEBUG		((__u64)1 << 11)
+#define GOSSIP_DEBUGFS_DEBUG		((__u64)1 << 12)
+#define GOSSIP_XATTR_DEBUG		((__u64)1 << 13)
+#define GOSSIP_INIT_DEBUG		((__u64)1 << 14)
+#define GOSSIP_SYSFS_DEBUG		((__u64)1 << 15)
+
+#define GOSSIP_MAX_NR                 16
+#define GOSSIP_MAX_DEBUG              (((__u64)1 << GOSSIP_MAX_NR) - 1)
+
+#endif /* __ORANGEFS_DEBUG_H */

linux-7.2.3/fs/orangefs/orangefs-debugfs.h

@@ -0,0 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+void orangefs_debugfs_init(int);
+void orangefs_debugfs_cleanup(void);
+int orangefs_prepare_debugfs_help_string(int);
+int orangefs_debugfs_new_client_mask(void __user *);
+int orangefs_debugfs_new_client_string(void __user *);
+int orangefs_debugfs_new_debug(void __user *);

linux-7.2.3/fs/orangefs/orangefs-dev-proto.h

@@ -0,0 +1,61 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ *
+ * See COPYING in top-level directory.
+ */
+
+#ifndef _ORANGEFS_DEV_PROTO_H
+#define _ORANGEFS_DEV_PROTO_H
+
+/*
+ * types and constants shared between user space and kernel space for
+ * device interaction using a common protocol
+ */
+
+/*
+ * valid orangefs kernel operation types
+ */
+#define ORANGEFS_VFS_OP_INVALID           0xFF000000
+#define ORANGEFS_VFS_OP_FILE_IO        0xFF000001
+#define ORANGEFS_VFS_OP_LOOKUP         0xFF000002
+#define ORANGEFS_VFS_OP_CREATE         0xFF000003
+#define ORANGEFS_VFS_OP_GETATTR        0xFF000004
+#define ORANGEFS_VFS_OP_REMOVE         0xFF000005
+#define ORANGEFS_VFS_OP_MKDIR          0xFF000006
+#define ORANGEFS_VFS_OP_READDIR        0xFF000007
+#define ORANGEFS_VFS_OP_SETATTR        0xFF000008
+#define ORANGEFS_VFS_OP_SYMLINK        0xFF000009
+#define ORANGEFS_VFS_OP_RENAME         0xFF00000A
+#define ORANGEFS_VFS_OP_STATFS         0xFF00000B
+#define ORANGEFS_VFS_OP_TRUNCATE       0xFF00000C
+#define ORANGEFS_VFS_OP_RA_FLUSH       0xFF00000D
+#define ORANGEFS_VFS_OP_FS_MOUNT       0xFF00000E
+#define ORANGEFS_VFS_OP_FS_UMOUNT      0xFF00000F
+#define ORANGEFS_VFS_OP_GETXATTR       0xFF000010
+#define ORANGEFS_VFS_OP_SETXATTR          0xFF000011
+#define ORANGEFS_VFS_OP_LISTXATTR         0xFF000012
+#define ORANGEFS_VFS_OP_REMOVEXATTR       0xFF000013
+#define ORANGEFS_VFS_OP_PARAM          0xFF000014
+#define ORANGEFS_VFS_OP_PERF_COUNT     0xFF000015
+#define ORANGEFS_VFS_OP_CANCEL            0xFF00EE00
+#define ORANGEFS_VFS_OP_FSYNC          0xFF00EE01
+#define ORANGEFS_VFS_OP_FSKEY             0xFF00EE02
+#define ORANGEFS_VFS_OP_READDIRPLUS       0xFF00EE03
+#define ORANGEFS_VFS_OP_FEATURES	0xFF00EE05 /* 2.9.6 */
+
+/* features is a 64-bit unsigned bitmask */
+#define ORANGEFS_FEATURE_READAHEAD 1
+
+/*
+ * Misc constants. Please retain them as multiples of 8!
+ * Otherwise 32-64 bit interactions will be messed up :)
+ */
+#define ORANGEFS_MAX_DEBUG_STRING_LEN	0x00000800
+
+#define ORANGEFS_MAX_DIRENT_COUNT_READDIR 512
+
+#include "upcall.h"
+#include "downcall.h"
+
+#endif

linux-7.2.3/fs/orangefs/orangefs-kernel.h

@@ -0,0 +1,484 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ *
+ * See COPYING in top-level directory.
+ */
+
+/*
+ *  The ORANGEFS Linux kernel support allows ORANGEFS volumes to be mounted and
+ *  accessed through the Linux VFS (i.e. using standard I/O system calls).
+ *  This support is only needed on clients that wish to mount the file system.
+ *
+ */
+
+/*
+ *  Declarations and macros for the ORANGEFS Linux kernel support.
+ */
+
+#ifndef __ORANGEFSKERNEL_H
+#define __ORANGEFSKERNEL_H
+
+#include <linux/kernel.h>
+#include <linux/moduleparam.h>
+#include <linux/statfs.h>
+#include <linux/backing-dev.h>
+#include <linux/device.h>
+#include <linux/mpage.h>
+#include <linux/namei.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/fs.h>
+#include <linux/fs_context.h>
+#include <linux/fs_parser.h>
+#include <linux/vmalloc.h>
+
+#include <linux/aio.h>
+#include <linux/posix_acl.h>
+#include <linux/posix_acl_xattr.h>
+#include <linux/compat.h>
+#include <linux/mount.h>
+#include <linux/uaccess.h>
+#include <linux/atomic.h>
+#include <linux/uio.h>
+#include <linux/sched/signal.h>
+#include <linux/mm.h>
+#include <linux/wait.h>
+#include <linux/dcache.h>
+#include <linux/pagemap.h>
+#include <linux/poll.h>
+#include <linux/rwsem.h>
+#include <linux/xattr.h>
+#include <linux/exportfs.h>
+#include <linux/hashtable.h>
+
+#include <linux/unaligned.h>
+
+#include "orangefs-dev-proto.h"
+
+#define ORANGEFS_DEFAULT_OP_TIMEOUT_SECS       20
+
+#define ORANGEFS_BUFMAP_WAIT_TIMEOUT_SECS   30
+
+#define ORANGEFS_DEFAULT_SLOT_TIMEOUT_SECS     900	/* 15 minutes */
+
+#define ORANGEFS_REQDEVICE_NAME          "pvfs2-req"
+
+#define ORANGEFS_DEVREQ_MAGIC             0x20030529
+#define ORANGEFS_PURGE_RETRY_COUNT     0x00000005
+
+#define MAX_DEV_REQ_UPSIZE (2 * sizeof(__s32) +   \
+sizeof(__u64) + sizeof(struct orangefs_upcall_s))
+#define MAX_DEV_REQ_DOWNSIZE (2 * sizeof(__s32) + \
+sizeof(__u64) + sizeof(struct orangefs_downcall_s))
+
+/*
+ * valid orangefs kernel operation states
+ *
+ * unknown  - op was just initialized
+ * waiting  - op is on request_list (upward bound)
+ * inprogr  - op is in progress (waiting for downcall)
+ * serviced - op has matching downcall; ok
+ * purged   - op has to start a timer since client-core
+ *            exited uncleanly before servicing op
+ * given up - submitter has given up waiting for it
+ */
+enum orangefs_vfs_op_states {
+	OP_VFS_STATE_UNKNOWN = 0,
+	OP_VFS_STATE_WAITING = 1,
+	OP_VFS_STATE_INPROGR = 2,
+	OP_VFS_STATE_SERVICED = 4,
+	OP_VFS_STATE_PURGED = 8,
+	OP_VFS_STATE_GIVEN_UP = 16,
+};
+
+extern const struct xattr_handler * const orangefs_xattr_handlers[];
+
+extern struct posix_acl *orangefs_get_acl(struct inode *inode, int type, bool rcu);
+extern int orangefs_set_acl(struct mnt_idmap *idmap,
+			    struct dentry *dentry, struct posix_acl *acl,
+			    int type);
+int __orangefs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
+
+/*
+ * orangefs data structures
+ */
+struct orangefs_kernel_op_s {
+	enum orangefs_vfs_op_states op_state;
+	__u64 tag;
+
+	/*
+	 * Set uses_shared_memory to non zero if this operation uses
+	 * shared memory. If true, then a retry on the op must also
+	 * get a new shared memory buffer and re-populate it.
+	 * Cancels don't care - it only matters for service_operation()
+	 * retry logics and cancels don't go through it anymore. It
+	 * safely stays non-zero when we use it as slot_to_free.
+	 */
+	union {
+		int uses_shared_memory;
+		int slot_to_free;
+	};
+
+	struct orangefs_upcall_s upcall;
+	struct orangefs_downcall_s downcall;
+
+	struct completion waitq;
+	spinlock_t lock;
+
+	int attempts;
+
+	struct list_head list;
+};
+
+#define set_op_state_waiting(op)     ((op)->op_state = OP_VFS_STATE_WAITING)
+#define set_op_state_inprogress(op)  ((op)->op_state = OP_VFS_STATE_INPROGR)
+#define set_op_state_given_up(op)  ((op)->op_state = OP_VFS_STATE_GIVEN_UP)
+static inline void set_op_state_serviced(struct orangefs_kernel_op_s *op)
+{
+	op->op_state = OP_VFS_STATE_SERVICED;
+	complete(&op->waitq);
+}
+
+#define op_state_waiting(op)     ((op)->op_state & OP_VFS_STATE_WAITING)
+#define op_state_in_progress(op) ((op)->op_state & OP_VFS_STATE_INPROGR)
+#define op_state_serviced(op)    ((op)->op_state & OP_VFS_STATE_SERVICED)
+#define op_state_purged(op)      ((op)->op_state & OP_VFS_STATE_PURGED)
+#define op_state_given_up(op)    ((op)->op_state & OP_VFS_STATE_GIVEN_UP)
+#define op_is_cancel(op)         ((op)->upcall.type == ORANGEFS_VFS_OP_CANCEL)
+
+void op_release(struct orangefs_kernel_op_s *op);
+
+extern void orangefs_bufmap_put(int);
+static inline void put_cancel(struct orangefs_kernel_op_s *op)
+{
+	orangefs_bufmap_put(op->slot_to_free);
+	op_release(op);
+}
+
+static inline void set_op_state_purged(struct orangefs_kernel_op_s *op)
+{
+	spin_lock(&op->lock);
+	if (unlikely(op_is_cancel(op))) {
+		list_del_init(&op->list);
+		spin_unlock(&op->lock);
+		put_cancel(op);
+	} else {
+		op->op_state |= OP_VFS_STATE_PURGED;
+		complete(&op->waitq);
+		spin_unlock(&op->lock);
+	}
+}
+
+/* per inode private orangefs info */
+struct orangefs_inode_s {
+	struct orangefs_object_kref refn;
+	char link_target[ORANGEFS_NAME_MAX];
+	/*
+	 * Reading/Writing Extended attributes need to acquire the appropriate
+	 * reader/writer semaphore on the orangefs_inode_s structure.
+	 */
+	struct rw_semaphore xattr_sem;
+
+	struct inode vfs_inode;
+	sector_t last_failed_block_index_read;
+
+	unsigned long getattr_time;
+	unsigned long mapping_time;
+	int attr_valid;
+	kuid_t attr_uid;
+	kgid_t attr_gid;
+	unsigned long bitlock;
+
+	DECLARE_HASHTABLE(xattr_cache, 4);
+};
+
+/* per superblock private orangefs info */
+struct orangefs_sb_info_s {
+	struct orangefs_khandle root_khandle;
+	__s32 fs_id;
+	int id;
+	int flags;
+#define ORANGEFS_OPT_INTR	0x01
+#define ORANGEFS_OPT_LOCAL_LOCK	0x02
+	char devname[ORANGEFS_MAX_SERVER_ADDR_LEN];
+	struct super_block *sb;
+	int mount_pending;
+	int no_list;
+	struct list_head list;
+};
+
+struct orangefs_stats {
+	unsigned long cache_hits;
+	unsigned long cache_misses;
+	unsigned long reads;
+	unsigned long writes;
+};
+
+struct orangefs_cached_xattr {
+	struct hlist_node node;
+	char key[ORANGEFS_MAX_XATTR_NAMELEN];
+	char val[ORANGEFS_MAX_XATTR_VALUELEN];
+	ssize_t length;
+	unsigned long timeout;
+};
+
+struct orangefs_write_range {
+	loff_t pos;
+	size_t len;
+	kuid_t uid;
+	kgid_t gid;
+};
+
+extern struct orangefs_stats orangefs_stats;
+
+/*
+ * NOTE: See Documentation/filesystems/porting.rst for information
+ * on implementing FOO_I and properly accessing fs private data
+ */
+static inline struct orangefs_inode_s *ORANGEFS_I(struct inode *inode)
+{
+	return container_of(inode, struct orangefs_inode_s, vfs_inode);
+}
+
+static inline struct orangefs_sb_info_s *ORANGEFS_SB(struct super_block *sb)
+{
+	return (struct orangefs_sb_info_s *) sb->s_fs_info;
+}
+
+/* ino_t descends from "unsigned long", 8 bytes, 64 bits. */
+static inline ino_t orangefs_khandle_to_ino(struct orangefs_khandle *khandle)
+{
+	union {
+		unsigned char u[8];
+		__u64 ino;
+	} ihandle;
+
+	ihandle.u[0] = khandle->u[0] ^ khandle->u[4];
+	ihandle.u[1] = khandle->u[1] ^ khandle->u[5];
+	ihandle.u[2] = khandle->u[2] ^ khandle->u[6];
+	ihandle.u[3] = khandle->u[3] ^ khandle->u[7];
+	ihandle.u[4] = khandle->u[12] ^ khandle->u[8];
+	ihandle.u[5] = khandle->u[13] ^ khandle->u[9];
+	ihandle.u[6] = khandle->u[14] ^ khandle->u[10];
+	ihandle.u[7] = khandle->u[15] ^ khandle->u[11];
+
+	return ihandle.ino;
+}
+
+static inline struct orangefs_khandle *get_khandle_from_ino(struct inode *inode)
+{
+	return &(ORANGEFS_I(inode)->refn.khandle);
+}
+
+static inline int is_root_handle(struct inode *inode)
+{
+	gossip_debug(GOSSIP_DCACHE_DEBUG,
+		     "%s: root handle: %pU, this handle: %pU:\n",
+		     __func__,
+		     &ORANGEFS_SB(inode->i_sb)->root_khandle,
+		     get_khandle_from_ino(inode));
+
+	if (ORANGEFS_khandle_cmp(&(ORANGEFS_SB(inode->i_sb)->root_khandle),
+			     get_khandle_from_ino(inode)))
+		return 0;
+	else
+		return 1;
+}
+
+static inline int match_handle(struct orangefs_khandle resp_handle,
+			       struct inode *inode)
+{
+	gossip_debug(GOSSIP_DCACHE_DEBUG,
+		     "%s: one handle: %pU, another handle:%pU:\n",
+		     __func__,
+		     &resp_handle,
+		     get_khandle_from_ino(inode));
+
+	if (ORANGEFS_khandle_cmp(&resp_handle, get_khandle_from_ino(inode)))
+		return 0;
+	else
+		return 1;
+}
+
+/*
+ * defined in orangefs-cache.c
+ */
+int op_cache_initialize(void);
+int op_cache_finalize(void);
+struct orangefs_kernel_op_s *op_alloc(__s32 type);
+void orangefs_new_tag(struct orangefs_kernel_op_s *op);
+char *get_opname_string(struct orangefs_kernel_op_s *new_op);
+
+int orangefs_inode_cache_initialize(void);
+int orangefs_inode_cache_finalize(void);
+
+/*
+ * defined in orangefs-mod.c
+ */
+void purge_inprogress_ops(void);
+
+/*
+ * defined in waitqueue.c
+ */
+void purge_waiting_ops(void);
+
+/*
+ * defined in super.c
+ */
+extern uint64_t orangefs_features;
+extern const struct fs_parameter_spec orangefs_fs_param_spec[];
+
+int orangefs_init_fs_context(struct fs_context *fc);
+
+void orangefs_kill_sb(struct super_block *sb);
+int orangefs_remount(struct orangefs_sb_info_s *);
+
+int fsid_key_table_initialize(void);
+void fsid_key_table_finalize(void);
+
+/*
+ * defined in inode.c
+ */
+vm_fault_t orangefs_page_mkwrite(struct vm_fault *);
+struct inode *orangefs_new_inode(struct super_block *sb,
+			      struct inode *dir,
+			      umode_t mode,
+			      dev_t dev,
+			      struct orangefs_object_kref *ref);
+
+int __orangefs_setattr(struct inode *, struct iattr *);
+int __orangefs_setattr_mode(struct dentry *dentry, struct iattr *iattr);
+int orangefs_setattr(struct mnt_idmap *, struct dentry *, struct iattr *);
+
+int orangefs_getattr(struct mnt_idmap *idmap, const struct path *path,
+		     struct kstat *stat, u32 request_mask, unsigned int flags);
+
+int orangefs_permission(struct mnt_idmap *idmap,
+			struct inode *inode, int mask);
+
+int orangefs_update_time(struct inode *inode, enum fs_update_time type,
+		unsigned int flags);
+
+/*
+ * defined in xattr.c
+ */
+ssize_t orangefs_listxattr(struct dentry *dentry, char *buffer, size_t size);
+
+/*
+ * defined in namei.c
+ */
+struct inode *orangefs_iget(struct super_block *sb,
+			 struct orangefs_object_kref *ref);
+
+/*
+ * defined in devorangefs-req.c
+ */
+extern uint32_t orangefs_userspace_version;
+
+int orangefs_dev_init(void);
+void orangefs_dev_cleanup(void);
+int is_daemon_in_service(void);
+bool __is_daemon_in_service(void);
+
+/*
+ * defined in file.c
+ */
+int orangefs_revalidate_mapping(struct inode *);
+ssize_t wait_for_direct_io(enum ORANGEFS_io_type, struct inode *, loff_t *,
+    struct iov_iter *, size_t, loff_t, struct orangefs_write_range *, int *,
+    struct file *);
+ssize_t do_readv_writev(enum ORANGEFS_io_type, struct file *, loff_t *,
+    struct iov_iter *);
+
+/*
+ * defined in orangefs-utils.c
+ */
+__s32 fsid_of_op(struct orangefs_kernel_op_s *op);
+
+ssize_t orangefs_inode_getxattr(struct inode *inode,
+			     const char *name,
+			     void *buffer,
+			     size_t size);
+
+int orangefs_inode_setxattr(struct inode *inode,
+			 const char *name,
+			 const void *value,
+			 size_t size,
+			 int flags);
+
+#define ORANGEFS_GETATTR_NEW 1
+#define ORANGEFS_GETATTR_SIZE 2
+
+int orangefs_inode_getattr(struct inode *, int);
+
+int orangefs_inode_check_changed(struct inode *inode);
+
+int orangefs_inode_setattr(struct inode *inode);
+
+bool orangefs_cancel_op_in_progress(struct orangefs_kernel_op_s *op);
+
+int orangefs_normalize_to_errno(__s32 error_code);
+
+extern struct mutex orangefs_request_mutex;
+extern int op_timeout_secs;
+extern int slot_timeout_secs;
+extern int orangefs_cache_timeout_msecs;
+extern int orangefs_dcache_timeout_msecs;
+extern int orangefs_getattr_timeout_msecs;
+extern struct list_head orangefs_superblocks;
+extern spinlock_t orangefs_superblocks_lock;
+extern struct list_head orangefs_request_list;
+extern spinlock_t orangefs_request_list_lock;
+extern wait_queue_head_t orangefs_request_list_waitq;
+extern struct list_head *orangefs_htable_ops_in_progress;
+extern spinlock_t orangefs_htable_ops_in_progress_lock;
+extern int hash_table_size;
+
+extern const struct file_operations orangefs_file_operations;
+extern const struct inode_operations orangefs_symlink_inode_operations;
+extern const struct inode_operations orangefs_dir_inode_operations;
+extern const struct file_operations orangefs_dir_operations;
+extern const struct dentry_operations orangefs_dentry_operations;
+
+/*
+ * misc convenience macros
+ */
+
+#define ORANGEFS_OP_INTERRUPTIBLE 1   /* service_operation() is interruptible */
+#define ORANGEFS_OP_PRIORITY      2   /* service_operation() is high priority */
+#define ORANGEFS_OP_CANCELLATION  4   /* this is a cancellation */
+#define ORANGEFS_OP_NO_MUTEX      8   /* don't acquire request_mutex */
+#define ORANGEFS_OP_ASYNC         16  /* Queue it, but don't wait */
+#define ORANGEFS_OP_WRITEBACK     32
+
+int service_operation(struct orangefs_kernel_op_s *op,
+		      const char *op_name,
+		      int flags);
+
+#define get_interruptible_flag(inode) \
+	((ORANGEFS_SB(inode->i_sb)->flags & ORANGEFS_OPT_INTR) ? \
+		ORANGEFS_OP_INTERRUPTIBLE : 0)
+
+#define fill_default_sys_attrs(sys_attr, mode)			\
+do {									\
+	sys_attr.owner = from_kuid(&init_user_ns, current_fsuid()); \
+	sys_attr.group = from_kgid(&init_user_ns, current_fsgid()); \
+	sys_attr.perms = ORANGEFS_util_translate_mode(mode);		\
+	sys_attr.mtime = 0;						\
+	sys_attr.atime = 0;						\
+	sys_attr.ctime = 0;						\
+	sys_attr.mask = ORANGEFS_ATTR_SYS_ALL_SETABLE;			\
+} while (0)
+
+static inline void orangefs_set_timeout(struct dentry *dentry)
+{
+	unsigned long time = jiffies + orangefs_dcache_timeout_msecs*HZ/1000;
+
+	dentry->d_fsdata = (void *) time;
+}
+
+#endif /* __ORANGEFSKERNEL_H */

linux-7.2.3/fs/orangefs/orangefs-mod.c

@@ -0,0 +1,232 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ *
+ * Changes by Acxiom Corporation to add proc file handler for pvfs2 client
+ * parameters, Copyright Acxiom Corporation, 2005.
+ *
+ * See COPYING in top-level directory.
+ */
+
+#include "protocol.h"
+#include "orangefs-kernel.h"
+#include "orangefs-debugfs.h"
+#include "orangefs-sysfs.h"
+
+/* ORANGEFS_VERSION is a ./configure define */
+#ifndef ORANGEFS_VERSION
+#define ORANGEFS_VERSION "upstream"
+#endif
+
+/*
+ * global variables declared here
+ */
+
+struct orangefs_stats orangefs_stats;
+
+/* the size of the hash tables for ops in progress */
+int hash_table_size = 509;
+
+static ulong module_parm_debug_mask;
+__u64 orangefs_gossip_debug_mask;
+int op_timeout_secs = ORANGEFS_DEFAULT_OP_TIMEOUT_SECS;
+int slot_timeout_secs = ORANGEFS_DEFAULT_SLOT_TIMEOUT_SECS;
+int orangefs_cache_timeout_msecs = 500;
+int orangefs_dcache_timeout_msecs = 50;
+int orangefs_getattr_timeout_msecs = 50;
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("ORANGEFS Development Team");
+MODULE_DESCRIPTION("The Linux Kernel VFS interface to ORANGEFS");
+MODULE_PARM_DESC(module_parm_debug_mask, "debugging level (see orangefs-debug.h for values)");
+MODULE_PARM_DESC(op_timeout_secs, "Operation timeout in seconds");
+MODULE_PARM_DESC(slot_timeout_secs, "Slot timeout in seconds");
+MODULE_PARM_DESC(hash_table_size,
+		 "size of hash table for operations in progress");
+
+static struct file_system_type orangefs_fs_type = {
+	.name = "pvfs2",
+	.init_fs_context = orangefs_init_fs_context,
+	.parameters = orangefs_fs_param_spec,
+	.kill_sb = orangefs_kill_sb,
+	.owner = THIS_MODULE,
+};
+
+module_param(hash_table_size, int, 0);
+module_param(module_parm_debug_mask, ulong, 0644);
+module_param(op_timeout_secs, int, 0);
+module_param(slot_timeout_secs, int, 0);
+
+/*
+ * Blocks non-priority requests from being queued for servicing.  This
+ * could be used for protecting the request list data structure, but
+ * for now it's only being used to stall the op addition to the request
+ * list
+ */
+DEFINE_MUTEX(orangefs_request_mutex);
+
+/* hash table for storing operations waiting for matching downcall */
+struct list_head *orangefs_htable_ops_in_progress;
+DEFINE_SPINLOCK(orangefs_htable_ops_in_progress_lock);
+
+/* list for queueing upcall operations */
+LIST_HEAD(orangefs_request_list);
+
+/* used to protect the above orangefs_request_list */
+DEFINE_SPINLOCK(orangefs_request_list_lock);
+
+/* used for incoming request notification */
+DECLARE_WAIT_QUEUE_HEAD(orangefs_request_list_waitq);
+
+static int __init orangefs_init(void)
+{
+	int ret;
+	__u32 i = 0;
+
+	if (op_timeout_secs < 0)
+		op_timeout_secs = 0;
+
+	if (slot_timeout_secs < 0)
+		slot_timeout_secs = 0;
+
+	/* initialize global book keeping data structures */
+	ret = op_cache_initialize();
+	if (ret < 0)
+		goto out;
+
+	ret = orangefs_inode_cache_initialize();
+	if (ret < 0)
+		goto cleanup_op;
+
+	orangefs_htable_ops_in_progress =
+	    kzalloc_objs(struct list_head, hash_table_size);
+	if (!orangefs_htable_ops_in_progress) {
+		ret = -ENOMEM;
+		goto cleanup_inode;
+	}
+
+	/* initialize a doubly linked at each hash table index */
+	for (i = 0; i < hash_table_size; i++)
+		INIT_LIST_HEAD(&orangefs_htable_ops_in_progress[i]);
+
+	ret = fsid_key_table_initialize();
+	if (ret < 0)
+		goto cleanup_progress_table;
+
+	/*
+	 * Build the contents of /sys/kernel/debug/orangefs/debug-help
+	 * from the keywords in the kernel keyword/mask array.
+	 *
+	 * The keywords in the client keyword/mask array are
+	 * unknown at boot time.
+	 *
+	 * orangefs_prepare_debugfs_help_string will be used again
+	 * later to rebuild the debug-help-string after the client starts
+	 * and passes along the needed info. The argument signifies
+	 * which time orangefs_prepare_debugfs_help_string is being
+	 * called.
+	 */
+	ret = orangefs_prepare_debugfs_help_string(1);
+	if (ret)
+		goto cleanup_key_table;
+
+	orangefs_debugfs_init(module_parm_debug_mask);
+
+	ret = orangefs_sysfs_init();
+	if (ret)
+		goto sysfs_init_failed;
+
+	/* Initialize the orangefsdev subsystem. */
+	ret = orangefs_dev_init();
+	if (ret < 0) {
+		gossip_err("%s: could not initialize device subsystem %d!\n",
+			   __func__,
+			   ret);
+		goto cleanup_sysfs;
+	}
+
+	ret = register_filesystem(&orangefs_fs_type);
+	if (ret == 0) {
+		pr_info("%s: module version %s loaded\n",
+			__func__,
+			ORANGEFS_VERSION);
+		goto out;
+	}
+
+	orangefs_dev_cleanup();
+
+cleanup_sysfs:
+	orangefs_sysfs_exit();
+
+sysfs_init_failed:
+	orangefs_debugfs_cleanup();
+
+cleanup_key_table:
+	fsid_key_table_finalize();
+
+cleanup_progress_table:
+	kfree(orangefs_htable_ops_in_progress);
+
+cleanup_inode:
+	orangefs_inode_cache_finalize();
+
+cleanup_op:
+	op_cache_finalize();
+
+out:
+	return ret;
+}
+
+static void __exit orangefs_exit(void)
+{
+	int i = 0;
+	gossip_debug(GOSSIP_INIT_DEBUG, "orangefs: orangefs_exit called\n");
+
+	unregister_filesystem(&orangefs_fs_type);
+	orangefs_debugfs_cleanup();
+	orangefs_sysfs_exit();
+	fsid_key_table_finalize();
+	orangefs_dev_cleanup();
+	BUG_ON(!list_empty(&orangefs_request_list));
+	for (i = 0; i < hash_table_size; i++)
+		BUG_ON(!list_empty(&orangefs_htable_ops_in_progress[i]));
+
+	orangefs_inode_cache_finalize();
+	op_cache_finalize();
+
+	kfree(orangefs_htable_ops_in_progress);
+
+	pr_info("orangefs: module version %s unloaded\n", ORANGEFS_VERSION);
+}
+
+/*
+ * What we do in this function is to walk the list of operations
+ * that are in progress in the hash table and mark them as purged as well.
+ */
+void purge_inprogress_ops(void)
+{
+	int i;
+
+	for (i = 0; i < hash_table_size; i++) {
+		struct orangefs_kernel_op_s *op;
+		struct orangefs_kernel_op_s *next;
+
+		spin_lock(&orangefs_htable_ops_in_progress_lock);
+		list_for_each_entry_safe(op,
+					 next,
+					 &orangefs_htable_ops_in_progress[i],
+					 list) {
+			set_op_state_purged(op);
+			gossip_debug(GOSSIP_DEV_DEBUG,
+				     "%s: op:%s: op_state:%d: process:%s:\n",
+				     __func__,
+				     get_opname_string(op),
+				     op->op_state,
+				     current->comm);
+		}
+		spin_unlock(&orangefs_htable_ops_in_progress_lock);
+	}
+}
+
+module_init(orangefs_init);
+module_exit(orangefs_exit);

linux-7.2.3/fs/orangefs/orangefs-sysfs.h

@@ -0,0 +1,2 @@
+extern int orangefs_sysfs_init(void);
+extern void orangefs_sysfs_exit(void);

linux-7.2.3/fs/orangefs/orangefs-utils.c

@@ -0,0 +1,560 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ * Copyright 2018 Omnibond Systems, L.L.C.
+ *
+ * See COPYING in top-level directory.
+ */
+#include <linux/kernel.h>
+#include "protocol.h"
+#include "orangefs-kernel.h"
+#include "orangefs-dev-proto.h"
+#include "orangefs-bufmap.h"
+
+__s32 fsid_of_op(struct orangefs_kernel_op_s *op)
+{
+	__s32 fsid = ORANGEFS_FS_ID_NULL;
+
+	if (op) {
+		switch (op->upcall.type) {
+		case ORANGEFS_VFS_OP_FILE_IO:
+			fsid = op->upcall.req.io.refn.fs_id;
+			break;
+		case ORANGEFS_VFS_OP_LOOKUP:
+			fsid = op->upcall.req.lookup.parent_refn.fs_id;
+			break;
+		case ORANGEFS_VFS_OP_CREATE:
+			fsid = op->upcall.req.create.parent_refn.fs_id;
+			break;
+		case ORANGEFS_VFS_OP_GETATTR:
+			fsid = op->upcall.req.getattr.refn.fs_id;
+			break;
+		case ORANGEFS_VFS_OP_REMOVE:
+			fsid = op->upcall.req.remove.parent_refn.fs_id;
+			break;
+		case ORANGEFS_VFS_OP_MKDIR:
+			fsid = op->upcall.req.mkdir.parent_refn.fs_id;
+			break;
+		case ORANGEFS_VFS_OP_READDIR:
+			fsid = op->upcall.req.readdir.refn.fs_id;
+			break;
+		case ORANGEFS_VFS_OP_SETATTR:
+			fsid = op->upcall.req.setattr.refn.fs_id;
+			break;
+		case ORANGEFS_VFS_OP_SYMLINK:
+			fsid = op->upcall.req.sym.parent_refn.fs_id;
+			break;
+		case ORANGEFS_VFS_OP_RENAME:
+			fsid = op->upcall.req.rename.old_parent_refn.fs_id;
+			break;
+		case ORANGEFS_VFS_OP_STATFS:
+			fsid = op->upcall.req.statfs.fs_id;
+			break;
+		case ORANGEFS_VFS_OP_TRUNCATE:
+			fsid = op->upcall.req.truncate.refn.fs_id;
+			break;
+		case ORANGEFS_VFS_OP_RA_FLUSH:
+			fsid = op->upcall.req.ra_cache_flush.refn.fs_id;
+			break;
+		case ORANGEFS_VFS_OP_FS_UMOUNT:
+			fsid = op->upcall.req.fs_umount.fs_id;
+			break;
+		case ORANGEFS_VFS_OP_GETXATTR:
+			fsid = op->upcall.req.getxattr.refn.fs_id;
+			break;
+		case ORANGEFS_VFS_OP_SETXATTR:
+			fsid = op->upcall.req.setxattr.refn.fs_id;
+			break;
+		case ORANGEFS_VFS_OP_LISTXATTR:
+			fsid = op->upcall.req.listxattr.refn.fs_id;
+			break;
+		case ORANGEFS_VFS_OP_REMOVEXATTR:
+			fsid = op->upcall.req.removexattr.refn.fs_id;
+			break;
+		case ORANGEFS_VFS_OP_FSYNC:
+			fsid = op->upcall.req.fsync.refn.fs_id;
+			break;
+		default:
+			break;
+		}
+	}
+	return fsid;
+}
+
+static int orangefs_inode_flags(struct ORANGEFS_sys_attr_s *attrs)
+{
+	int flags = 0;
+	if (attrs->flags & ORANGEFS_IMMUTABLE_FL)
+		flags |= S_IMMUTABLE;
+	else
+		flags &= ~S_IMMUTABLE;
+	if (attrs->flags & ORANGEFS_APPEND_FL)
+		flags |= S_APPEND;
+	else
+		flags &= ~S_APPEND;
+	if (attrs->flags & ORANGEFS_NOATIME_FL)
+		flags |= S_NOATIME;
+	else
+		flags &= ~S_NOATIME;
+	return flags;
+}
+
+static int orangefs_inode_perms(struct ORANGEFS_sys_attr_s *attrs)
+{
+	int perm_mode = 0;
+
+	if (attrs->perms & ORANGEFS_O_EXECUTE)
+		perm_mode |= S_IXOTH;
+	if (attrs->perms & ORANGEFS_O_WRITE)
+		perm_mode |= S_IWOTH;
+	if (attrs->perms & ORANGEFS_O_READ)
+		perm_mode |= S_IROTH;
+
+	if (attrs->perms & ORANGEFS_G_EXECUTE)
+		perm_mode |= S_IXGRP;
+	if (attrs->perms & ORANGEFS_G_WRITE)
+		perm_mode |= S_IWGRP;
+	if (attrs->perms & ORANGEFS_G_READ)
+		perm_mode |= S_IRGRP;
+
+	if (attrs->perms & ORANGEFS_U_EXECUTE)
+		perm_mode |= S_IXUSR;
+	if (attrs->perms & ORANGEFS_U_WRITE)
+		perm_mode |= S_IWUSR;
+	if (attrs->perms & ORANGEFS_U_READ)
+		perm_mode |= S_IRUSR;
+
+	if (attrs->perms & ORANGEFS_G_SGID)
+		perm_mode |= S_ISGID;
+	if (attrs->perms & ORANGEFS_U_SUID)
+		perm_mode |= S_ISUID;
+
+	return perm_mode;
+}
+
+/*
+ * NOTE: in kernel land, we never use the sys_attr->link_target for
+ * anything, so don't bother copying it into the sys_attr object here.
+ */
+static inline void copy_attributes_from_inode(struct inode *inode,
+    struct ORANGEFS_sys_attr_s *attrs)
+{
+	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
+	attrs->mask = 0;
+	if (orangefs_inode->attr_valid & ATTR_UID) {
+		attrs->owner = from_kuid(&init_user_ns, inode->i_uid);
+		attrs->mask |= ORANGEFS_ATTR_SYS_UID;
+		gossip_debug(GOSSIP_UTILS_DEBUG, "(UID) %d\n", attrs->owner);
+	}
+	if (orangefs_inode->attr_valid & ATTR_GID) {
+		attrs->group = from_kgid(&init_user_ns, inode->i_gid);
+		attrs->mask |= ORANGEFS_ATTR_SYS_GID;
+		gossip_debug(GOSSIP_UTILS_DEBUG, "(GID) %d\n", attrs->group);
+	}
+
+	if (orangefs_inode->attr_valid & ATTR_ATIME) {
+		attrs->mask |= ORANGEFS_ATTR_SYS_ATIME;
+		if (orangefs_inode->attr_valid & ATTR_ATIME_SET) {
+			attrs->atime = (time64_t) inode_get_atime_sec(inode);
+			attrs->mask |= ORANGEFS_ATTR_SYS_ATIME_SET;
+		}
+	}
+	if (orangefs_inode->attr_valid & ATTR_MTIME) {
+		attrs->mask |= ORANGEFS_ATTR_SYS_MTIME;
+		if (orangefs_inode->attr_valid & ATTR_MTIME_SET) {
+			attrs->mtime = (time64_t) inode_get_mtime_sec(inode);
+			attrs->mask |= ORANGEFS_ATTR_SYS_MTIME_SET;
+		}
+	}
+	if (orangefs_inode->attr_valid & ATTR_CTIME)
+		attrs->mask |= ORANGEFS_ATTR_SYS_CTIME;
+
+	/*
+	 * ORANGEFS cannot set size with a setattr operation. Probably not
+	 * likely to be requested through the VFS, but just in case, don't
+	 * worry about ATTR_SIZE
+	 */
+
+	if (orangefs_inode->attr_valid & ATTR_MODE) {
+		attrs->perms = ORANGEFS_util_translate_mode(inode->i_mode);
+		attrs->mask |= ORANGEFS_ATTR_SYS_PERM;
+	}
+}
+
+static int orangefs_inode_type(enum orangefs_ds_type objtype)
+{
+	if (objtype == ORANGEFS_TYPE_METAFILE)
+		return S_IFREG;
+	else if (objtype == ORANGEFS_TYPE_DIRECTORY)
+		return S_IFDIR;
+	else if (objtype == ORANGEFS_TYPE_SYMLINK)
+		return S_IFLNK;
+	else
+		return -1;
+}
+
+static void orangefs_make_bad_inode(struct inode *inode)
+{
+	if (is_root_handle(inode)) {
+		/*
+		 * if this occurs, the pvfs2-client-core was killed but we
+		 * can't afford to lose the inode operations and such
+		 * associated with the root handle in any case.
+		 */
+		gossip_debug(GOSSIP_UTILS_DEBUG,
+			     "*** NOT making bad root inode %pU\n",
+			     get_khandle_from_ino(inode));
+	} else {
+		gossip_debug(GOSSIP_UTILS_DEBUG,
+			     "*** making bad inode %pU\n",
+			     get_khandle_from_ino(inode));
+		make_bad_inode(inode);
+	}
+}
+
+static int orangefs_inode_is_stale(struct inode *inode,
+    struct ORANGEFS_sys_attr_s *attrs, char *link_target)
+{
+	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
+	int type = orangefs_inode_type(attrs->objtype);
+	/*
+	 * If the inode type or symlink target have changed then this
+	 * inode is stale.
+	 */
+	if (type == -1 || inode_wrong_type(inode, type)) {
+		orangefs_make_bad_inode(inode);
+		return 1;
+	}
+	if (type == S_IFLNK && strncmp(orangefs_inode->link_target,
+	    link_target, ORANGEFS_NAME_MAX)) {
+		orangefs_make_bad_inode(inode);
+		return 1;
+	}
+	return 0;
+}
+
+int orangefs_inode_getattr(struct inode *inode, int flags)
+{
+	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
+	struct orangefs_kernel_op_s *new_op;
+	loff_t inode_size;
+	int ret, type;
+
+	gossip_debug(GOSSIP_UTILS_DEBUG, "%s: called on inode %pU flags %d\n",
+	    __func__, get_khandle_from_ino(inode), flags);
+
+again:
+	spin_lock(&inode->i_lock);
+	/* Must have all the attributes in the mask and be within cache time. */
+	if ((!flags && time_before(jiffies, orangefs_inode->getattr_time)) ||
+	    orangefs_inode->attr_valid || inode_state_read(inode) & I_DIRTY_PAGES) {
+		if (orangefs_inode->attr_valid) {
+			spin_unlock(&inode->i_lock);
+			write_inode_now(inode, 1);
+			goto again;
+		}
+		spin_unlock(&inode->i_lock);
+		return 0;
+	}
+	spin_unlock(&inode->i_lock);
+
+	new_op = op_alloc(ORANGEFS_VFS_OP_GETATTR);
+	if (!new_op)
+		return -ENOMEM;
+	new_op->upcall.req.getattr.refn = orangefs_inode->refn;
+	/*
+	 * Size is the hardest attribute to get.  The incremental cost of any
+	 * other attribute is essentially zero.
+	 */
+	if (flags)
+		new_op->upcall.req.getattr.mask = ORANGEFS_ATTR_SYS_ALL_NOHINT;
+	else
+		new_op->upcall.req.getattr.mask =
+		    ORANGEFS_ATTR_SYS_ALL_NOHINT & ~ORANGEFS_ATTR_SYS_SIZE;
+
+	ret = service_operation(new_op, __func__,
+	    get_interruptible_flag(inode));
+	if (ret != 0)
+		goto out;
+
+again2:
+	spin_lock(&inode->i_lock);
+	/* Must have all the attributes in the mask and be within cache time. */
+	if ((!flags && time_before(jiffies, orangefs_inode->getattr_time)) ||
+	    orangefs_inode->attr_valid || inode_state_read(inode) & I_DIRTY_PAGES) {
+		if (orangefs_inode->attr_valid) {
+			spin_unlock(&inode->i_lock);
+			write_inode_now(inode, 1);
+			goto again2;
+		}
+		if (inode_state_read(inode) & I_DIRTY_PAGES) {
+			ret = 0;
+			goto out_unlock;
+		}
+		gossip_debug(GOSSIP_UTILS_DEBUG, "%s: in cache or dirty\n",
+		    __func__);
+		ret = 0;
+		goto out_unlock;
+	}
+
+	if (!(flags & ORANGEFS_GETATTR_NEW)) {
+		ret = orangefs_inode_is_stale(inode,
+		    &new_op->downcall.resp.getattr.attributes,
+		    new_op->downcall.resp.getattr.link_target);
+		if (ret) {
+			ret = -ESTALE;
+			goto out_unlock;
+		}
+	}
+
+	type = orangefs_inode_type(new_op->
+	    downcall.resp.getattr.attributes.objtype);
+	switch (type) {
+	case S_IFREG:
+		inode->i_flags = orangefs_inode_flags(&new_op->
+		    downcall.resp.getattr.attributes);
+		if (flags) {
+			inode_size = (loff_t)new_op->
+			    downcall.resp.getattr.attributes.size;
+			inode->i_size = inode_size;
+			inode->i_blkbits = ffs(new_op->downcall.resp.getattr.
+			    attributes.blksize);
+			inode->i_bytes = inode_size;
+			inode->i_blocks =
+			    (inode_size + 512 - inode_size % 512)/512;
+		}
+		break;
+	case S_IFDIR:
+		if (flags) {
+			inode->i_size = PAGE_SIZE;
+			inode_set_bytes(inode, inode->i_size);
+		}
+		set_nlink(inode, 1);
+		break;
+	case S_IFLNK:
+		if (flags & ORANGEFS_GETATTR_NEW) {
+			inode->i_size = (loff_t)strlen(new_op->
+			    downcall.resp.getattr.link_target);
+			ret = strscpy(orangefs_inode->link_target,
+			    new_op->downcall.resp.getattr.link_target,
+			    ORANGEFS_NAME_MAX);
+			if (ret == -E2BIG) {
+				ret = -EIO;
+				goto out_unlock;
+			}
+			inode->i_link = orangefs_inode->link_target;
+		}
+		break;
+	/* i.e. -1 */
+	default:
+		/* XXX: ESTALE?  This is what is done if it is not new. */
+		orangefs_make_bad_inode(inode);
+		ret = -ESTALE;
+		goto out_unlock;
+	}
+
+	inode->i_uid = make_kuid(&init_user_ns, new_op->
+	    downcall.resp.getattr.attributes.owner);
+	inode->i_gid = make_kgid(&init_user_ns, new_op->
+	    downcall.resp.getattr.attributes.group);
+	inode_set_atime(inode,
+			(time64_t)new_op->downcall.resp.getattr.attributes.atime,
+			0);
+	inode_set_mtime(inode,
+			(time64_t)new_op->downcall.resp.getattr.attributes.mtime,
+			0);
+	inode_set_ctime(inode,
+			(time64_t)new_op->downcall.resp.getattr.attributes.ctime,
+			0);
+
+	/* special case: mark the root inode as sticky */
+	inode->i_mode = type | (is_root_handle(inode) ? S_ISVTX : 0) |
+	    orangefs_inode_perms(&new_op->downcall.resp.getattr.attributes);
+
+	orangefs_inode->getattr_time = jiffies +
+	    orangefs_getattr_timeout_msecs*HZ/1000;
+	ret = 0;
+out_unlock:
+	spin_unlock(&inode->i_lock);
+out:
+	op_release(new_op);
+	return ret;
+}
+
+int orangefs_inode_check_changed(struct inode *inode)
+{
+	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
+	struct orangefs_kernel_op_s *new_op;
+	int ret;
+
+	gossip_debug(GOSSIP_UTILS_DEBUG, "%s: called on inode %pU\n", __func__,
+	    get_khandle_from_ino(inode));
+
+	new_op = op_alloc(ORANGEFS_VFS_OP_GETATTR);
+	if (!new_op)
+		return -ENOMEM;
+	new_op->upcall.req.getattr.refn = orangefs_inode->refn;
+	new_op->upcall.req.getattr.mask = ORANGEFS_ATTR_SYS_TYPE |
+	    ORANGEFS_ATTR_SYS_LNK_TARGET;
+
+	ret = service_operation(new_op, __func__,
+	    get_interruptible_flag(inode));
+	if (ret != 0)
+		goto out;
+
+	ret = orangefs_inode_is_stale(inode,
+	    &new_op->downcall.resp.getattr.attributes,
+	    new_op->downcall.resp.getattr.link_target);
+out:
+	op_release(new_op);
+	return ret;
+}
+
+/*
+ * issues a orangefs setattr request to make sure the new attribute values
+ * take effect if successful.  returns 0 on success; -errno otherwise
+ */
+int orangefs_inode_setattr(struct inode *inode)
+{
+	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
+	struct orangefs_kernel_op_s *new_op;
+	int ret;
+
+	new_op = op_alloc(ORANGEFS_VFS_OP_SETATTR);
+	if (!new_op)
+		return -ENOMEM;
+
+	spin_lock(&inode->i_lock);
+	new_op->upcall.uid = from_kuid(&init_user_ns, orangefs_inode->attr_uid);
+	new_op->upcall.gid = from_kgid(&init_user_ns, orangefs_inode->attr_gid);
+	new_op->upcall.req.setattr.refn = orangefs_inode->refn;
+	copy_attributes_from_inode(inode,
+	    &new_op->upcall.req.setattr.attributes);
+	orangefs_inode->attr_valid = 0;
+	if (!new_op->upcall.req.setattr.attributes.mask) {
+		spin_unlock(&inode->i_lock);
+		op_release(new_op);
+		return 0;
+	}
+	spin_unlock(&inode->i_lock);
+
+	ret = service_operation(new_op, __func__,
+	    get_interruptible_flag(inode) | ORANGEFS_OP_WRITEBACK);
+	gossip_debug(GOSSIP_UTILS_DEBUG,
+	    "orangefs_inode_setattr: returning %d\n", ret);
+	if (ret)
+		orangefs_make_bad_inode(inode);
+
+	op_release(new_op);
+
+	if (ret == 0)
+		orangefs_inode->getattr_time = jiffies - 1;
+	return ret;
+}
+
+/*
+ * The following is a very dirty hack that is now a permanent part of the
+ * ORANGEFS protocol. See protocol.h for more error definitions.
+ */
+
+/* The order matches include/orangefs-types.h in the OrangeFS source. */
+static int PINT_errno_mapping[] = {
+	0, EPERM, ENOENT, EINTR, EIO, ENXIO, EBADF, EAGAIN, ENOMEM,
+	EFAULT, EBUSY, EEXIST, ENODEV, ENOTDIR, EISDIR, EINVAL, EMFILE,
+	EFBIG, ENOSPC, EROFS, EMLINK, EPIPE, EDEADLK, ENAMETOOLONG,
+	ENOLCK, ENOSYS, ENOTEMPTY, ELOOP, EWOULDBLOCK, ENOMSG, EUNATCH,
+	EBADR, EDEADLOCK, ENODATA, ETIME, ENONET, EREMOTE, ECOMM,
+	EPROTO, EBADMSG, EOVERFLOW, ERESTART, EMSGSIZE, EPROTOTYPE,
+	ENOPROTOOPT, EPROTONOSUPPORT, EOPNOTSUPP, EADDRINUSE,
+	EADDRNOTAVAIL, ENETDOWN, ENETUNREACH, ENETRESET, ENOBUFS,
+	ETIMEDOUT, ECONNREFUSED, EHOSTDOWN, EHOSTUNREACH, EALREADY,
+	EACCES, ECONNRESET, ERANGE
+};
+
+int orangefs_normalize_to_errno(__s32 error_code)
+{
+	__u32 i;
+
+	/* Success */
+	if (error_code == 0) {
+		return 0;
+	/*
+	 * This shouldn't ever happen. If it does it should be fixed on the
+	 * server.
+	 */
+	} else if (error_code > 0) {
+		gossip_err("orangefs: error status received.\n");
+		gossip_err("orangefs: assuming error code is inverted.\n");
+		error_code = -error_code;
+	}
+
+	/*
+	 * XXX: This is very bad since error codes from ORANGEFS may not be
+	 * suitable for return into userspace.
+	 */
+
+	/*
+	 * Convert ORANGEFS error values into errno values suitable for return
+	 * from the kernel.
+	 */
+	if ((-error_code) & ORANGEFS_NON_ERRNO_ERROR_BIT) {
+		if (((-error_code) &
+		    (ORANGEFS_ERROR_NUMBER_BITS|ORANGEFS_NON_ERRNO_ERROR_BIT|
+		    ORANGEFS_ERROR_BIT)) == ORANGEFS_ECANCEL) {
+			/*
+			 * cancellation error codes generally correspond to
+			 * a timeout from the client's perspective
+			 */
+			error_code = -ETIMEDOUT;
+		} else {
+			/* assume a default error code */
+			gossip_err("%s: bad error code :%d:.\n",
+				__func__,
+				error_code);
+			error_code = -EINVAL;
+		}
+
+	/* Convert ORANGEFS encoded errno values into regular errno values. */
+	} else if ((-error_code) & ORANGEFS_ERROR_BIT) {
+		i = (-error_code) & ~(ORANGEFS_ERROR_BIT|ORANGEFS_ERROR_CLASS_BITS);
+		if (i < ARRAY_SIZE(PINT_errno_mapping))
+			error_code = -PINT_errno_mapping[i];
+		else
+			error_code = -EINVAL;
+
+	/*
+	 * Only ORANGEFS protocol error codes should ever come here. Otherwise
+	 * there is a bug somewhere.
+	 */
+	} else {
+		gossip_err("%s: unknown error code.\n", __func__);
+		error_code = -EINVAL;
+	}
+	return error_code;
+}
+
+#define NUM_MODES 11
+__s32 ORANGEFS_util_translate_mode(int mode)
+{
+	int ret = 0;
+	int i = 0;
+	static int modes[NUM_MODES] = {
+		S_IXOTH, S_IWOTH, S_IROTH,
+		S_IXGRP, S_IWGRP, S_IRGRP,
+		S_IXUSR, S_IWUSR, S_IRUSR,
+		S_ISGID, S_ISUID
+	};
+	static int orangefs_modes[NUM_MODES] = {
+		ORANGEFS_O_EXECUTE, ORANGEFS_O_WRITE, ORANGEFS_O_READ,
+		ORANGEFS_G_EXECUTE, ORANGEFS_G_WRITE, ORANGEFS_G_READ,
+		ORANGEFS_U_EXECUTE, ORANGEFS_U_WRITE, ORANGEFS_U_READ,
+		ORANGEFS_G_SGID, ORANGEFS_U_SUID
+	};
+
+	for (i = 0; i < NUM_MODES; i++)
+		if (mode & modes[i])
+			ret |= orangefs_modes[i];
+
+	return ret;
+}
+#undef NUM_MODES

linux-7.2.3/fs/orangefs/protocol.h

@@ -0,0 +1,362 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/spinlock_types.h>
+#include <linux/slab.h>
+#include <linux/ioctl.h>
+
+/* khandle stuff  ***********************************************************/
+
+/*
+ * The 2.9 core will put 64 bit handles in here like this:
+ *    1234 0000 0000 5678
+ * The 3.0 and beyond cores will put 128 bit handles in here like this:
+ *    1234 5678 90AB CDEF
+ * The kernel module will always use the first four bytes and
+ * the last four bytes as an inum.
+ */
+struct orangefs_khandle {
+	unsigned char u[16];
+}  __aligned(8);
+
+/*
+ * kernel version of an object ref.
+ */
+struct orangefs_object_kref {
+	struct orangefs_khandle khandle;
+	__s32 fs_id;
+	__s32 __pad1;
+};
+
+/*
+ * compare 2 khandles assumes little endian thus from large address to
+ * small address
+ */
+static inline int ORANGEFS_khandle_cmp(const struct orangefs_khandle *kh1,
+				   const struct orangefs_khandle *kh2)
+{
+	int i;
+
+	for (i = 15; i >= 0; i--) {
+		if (kh1->u[i] > kh2->u[i])
+			return 1;
+		if (kh1->u[i] < kh2->u[i])
+			return -1;
+	}
+
+	return 0;
+}
+
+static inline void ORANGEFS_khandle_to(const struct orangefs_khandle *kh,
+				   void *p, int size)
+{
+
+	memcpy(p, kh->u, 16);
+	memset(p + 16, 0, size - 16);
+
+}
+
+static inline void ORANGEFS_khandle_from(struct orangefs_khandle *kh,
+				     void *p, int size)
+{
+	memset(kh, 0, 16);
+	memcpy(kh->u, p, 16);
+
+}
+
+/* pvfs2-types.h ************************************************************/
+
+#define ORANGEFS_SUPER_MAGIC 0x20030528
+
+/*
+ * ORANGEFS error codes are a signed 32-bit integer. Error codes are negative, but
+ * the sign is stripped before decoding.
+ */
+
+/* Bit 31 is not used since it is the sign. */
+
+/*
+ * Bit 30 specifies that this is a ORANGEFS error. A ORANGEFS error is either an
+ * encoded errno value or a ORANGEFS protocol error.
+ */
+#define ORANGEFS_ERROR_BIT (1 << 30)
+
+/*
+ * Bit 29 specifies that this is a ORANGEFS protocol error and not an encoded
+ * errno value.
+ */
+#define ORANGEFS_NON_ERRNO_ERROR_BIT (1 << 29)
+
+/*
+ * Bits 9, 8, and 7 specify the error class, which encodes the section of
+ * server code the error originated in for logging purposes. It is not used
+ * in the kernel except to be masked out.
+ */
+#define ORANGEFS_ERROR_CLASS_BITS 0x380
+
+/* Bits 6 - 0 are reserved for the actual error code. */
+#define ORANGEFS_ERROR_NUMBER_BITS 0x7f
+
+/* Encoded errno values decoded by PINT_errno_mapping in orangefs-utils.c. */
+
+/* Our own ORANGEFS protocol error codes. */
+#define ORANGEFS_ECANCEL    (1|ORANGEFS_NON_ERRNO_ERROR_BIT|ORANGEFS_ERROR_BIT)
+#define ORANGEFS_EDEVINIT   (2|ORANGEFS_NON_ERRNO_ERROR_BIT|ORANGEFS_ERROR_BIT)
+#define ORANGEFS_EDETAIL    (3|ORANGEFS_NON_ERRNO_ERROR_BIT|ORANGEFS_ERROR_BIT)
+#define ORANGEFS_EHOSTNTFD  (4|ORANGEFS_NON_ERRNO_ERROR_BIT|ORANGEFS_ERROR_BIT)
+#define ORANGEFS_EADDRNTFD  (5|ORANGEFS_NON_ERRNO_ERROR_BIT|ORANGEFS_ERROR_BIT)
+#define ORANGEFS_ENORECVR   (6|ORANGEFS_NON_ERRNO_ERROR_BIT|ORANGEFS_ERROR_BIT)
+#define ORANGEFS_ETRYAGAIN  (7|ORANGEFS_NON_ERRNO_ERROR_BIT|ORANGEFS_ERROR_BIT)
+#define ORANGEFS_ENOTPVFS   (8|ORANGEFS_NON_ERRNO_ERROR_BIT|ORANGEFS_ERROR_BIT)
+#define ORANGEFS_ESECURITY  (9|ORANGEFS_NON_ERRNO_ERROR_BIT|ORANGEFS_ERROR_BIT)
+
+/* permission bits */
+#define ORANGEFS_O_EXECUTE (1 << 0)
+#define ORANGEFS_O_WRITE   (1 << 1)
+#define ORANGEFS_O_READ    (1 << 2)
+#define ORANGEFS_G_EXECUTE (1 << 3)
+#define ORANGEFS_G_WRITE   (1 << 4)
+#define ORANGEFS_G_READ    (1 << 5)
+#define ORANGEFS_U_EXECUTE (1 << 6)
+#define ORANGEFS_U_WRITE   (1 << 7)
+#define ORANGEFS_U_READ    (1 << 8)
+/* no ORANGEFS_U_VTX (sticky bit) */
+#define ORANGEFS_G_SGID    (1 << 10)
+#define ORANGEFS_U_SUID    (1 << 11)
+
+#define ORANGEFS_ITERATE_START    2147483646
+#define ORANGEFS_ITERATE_END      2147483645
+#define ORANGEFS_IMMUTABLE_FL FS_IMMUTABLE_FL
+#define ORANGEFS_APPEND_FL    FS_APPEND_FL
+#define ORANGEFS_NOATIME_FL   FS_NOATIME_FL
+#define ORANGEFS_MIRROR_FL    0x01000000ULL
+#define ORANGEFS_FS_ID_NULL       ((__s32)0)
+#define ORANGEFS_ATTR_SYS_UID                   (1 << 0)
+#define ORANGEFS_ATTR_SYS_GID                   (1 << 1)
+#define ORANGEFS_ATTR_SYS_PERM                  (1 << 2)
+#define ORANGEFS_ATTR_SYS_ATIME                 (1 << 3)
+#define ORANGEFS_ATTR_SYS_CTIME                 (1 << 4)
+#define ORANGEFS_ATTR_SYS_MTIME                 (1 << 5)
+#define ORANGEFS_ATTR_SYS_TYPE                  (1 << 6)
+#define ORANGEFS_ATTR_SYS_ATIME_SET             (1 << 7)
+#define ORANGEFS_ATTR_SYS_MTIME_SET             (1 << 8)
+#define ORANGEFS_ATTR_SYS_SIZE                  (1 << 20)
+#define ORANGEFS_ATTR_SYS_LNK_TARGET            (1 << 24)
+#define ORANGEFS_ATTR_SYS_DFILE_COUNT           (1 << 25)
+#define ORANGEFS_ATTR_SYS_DIRENT_COUNT          (1 << 26)
+#define ORANGEFS_ATTR_SYS_BLKSIZE               (1 << 28)
+#define ORANGEFS_ATTR_SYS_MIRROR_COPIES_COUNT   (1 << 29)
+#define ORANGEFS_ATTR_SYS_COMMON_ALL	\
+	(ORANGEFS_ATTR_SYS_UID	|	\
+	 ORANGEFS_ATTR_SYS_GID	|	\
+	 ORANGEFS_ATTR_SYS_PERM	|	\
+	 ORANGEFS_ATTR_SYS_ATIME	|	\
+	 ORANGEFS_ATTR_SYS_CTIME	|	\
+	 ORANGEFS_ATTR_SYS_MTIME	|	\
+	 ORANGEFS_ATTR_SYS_TYPE)
+
+#define ORANGEFS_ATTR_SYS_ALL_SETABLE		\
+(ORANGEFS_ATTR_SYS_COMMON_ALL-ORANGEFS_ATTR_SYS_TYPE)
+
+#define ORANGEFS_ATTR_SYS_ALL_NOHINT			\
+	(ORANGEFS_ATTR_SYS_COMMON_ALL		|	\
+	 ORANGEFS_ATTR_SYS_SIZE			|	\
+	 ORANGEFS_ATTR_SYS_LNK_TARGET		|	\
+	 ORANGEFS_ATTR_SYS_DFILE_COUNT		|	\
+	 ORANGEFS_ATTR_SYS_MIRROR_COPIES_COUNT	|	\
+	 ORANGEFS_ATTR_SYS_DIRENT_COUNT		|	\
+	 ORANGEFS_ATTR_SYS_BLKSIZE)
+
+#define ORANGEFS_XATTR_REPLACE 0x2
+#define ORANGEFS_XATTR_CREATE  0x1
+#define ORANGEFS_MAX_SERVER_ADDR_LEN 256
+#define ORANGEFS_NAME_MAX                256
+/*
+ * max extended attribute name len as imposed by the VFS and exploited for the
+ * upcall request types.
+ * NOTE: Please retain them as multiples of 8 even if you wish to change them
+ * This is *NECESSARY* for supporting 32 bit user-space binaries on a 64-bit
+ * kernel. Due to implementation within DBPF, this really needs to be
+ * ORANGEFS_NAME_MAX, which it was the same value as, but no reason to let it
+ * break if that changes in the future.
+ */
+#define ORANGEFS_MAX_XATTR_NAMELEN   ORANGEFS_NAME_MAX	/* Not the same as
+						 * XATTR_NAME_MAX defined
+						 * by <linux/xattr.h>
+						 */
+#define ORANGEFS_MAX_XATTR_VALUELEN  8192	/* Not the same as XATTR_SIZE_MAX
+					 * defined by <linux/xattr.h>
+					 */
+#define ORANGEFS_MAX_XATTR_LISTLEN   16	/* Not the same as XATTR_LIST_MAX
+					 * defined by <linux/xattr.h>
+					 */
+/*
+ * ORANGEFS I/O operation types, used in both system and server interfaces.
+ */
+enum ORANGEFS_io_type {
+	ORANGEFS_IO_READ = 1,
+	ORANGEFS_IO_WRITE = 2
+};
+
+/*
+ * If this enum is modified the server parameters related to the precreate pool
+ * batch and low threshold sizes may need to be modified  to reflect this
+ * change.
+ */
+enum orangefs_ds_type {
+	ORANGEFS_TYPE_NONE = 0,
+	ORANGEFS_TYPE_METAFILE = (1 << 0),
+	ORANGEFS_TYPE_DATAFILE = (1 << 1),
+	ORANGEFS_TYPE_DIRECTORY = (1 << 2),
+	ORANGEFS_TYPE_SYMLINK = (1 << 3),
+	ORANGEFS_TYPE_DIRDATA = (1 << 4),
+	ORANGEFS_TYPE_INTERNAL = (1 << 5)	/* for the server's private use */
+};
+
+/* This structure is used by the VFS-client interaction alone */
+struct ORANGEFS_keyval_pair {
+	char key[ORANGEFS_MAX_XATTR_NAMELEN];
+	__s32 key_sz;	/* __s32 for portable, fixed-size structures */
+	__s32 val_sz;
+	char val[ORANGEFS_MAX_XATTR_VALUELEN];
+};
+
+/* pvfs2-sysint.h ***********************************************************/
+/* Describes attributes for a file, directory, or symlink. */
+struct ORANGEFS_sys_attr_s {
+	__u32 owner;
+	__u32 group;
+	__u32 perms;
+	__u64 atime;
+	__u64 mtime;
+	__u64 ctime;
+	__s64 size;
+
+	/* NOTE: caller must free if valid */
+	char *link_target;
+
+	/* Changed to __s32 so that size of structure does not change */
+	__s32 dfile_count;
+
+	/* Changed to __s32 so that size of structure does not change */
+	__s32 distr_dir_servers_initial;
+
+	/* Changed to __s32 so that size of structure does not change */
+	__s32 distr_dir_servers_max;
+
+	/* Changed to __s32 so that size of structure does not change */
+	__s32 distr_dir_split_size;
+
+	__u32 mirror_copies_count;
+
+	/* NOTE: caller must free if valid */
+	char *dist_name;
+
+	/* NOTE: caller must free if valid */
+	char *dist_params;
+
+	__s64 dirent_count;
+	enum orangefs_ds_type objtype;
+	__u64 flags;
+	__u32 mask;
+	__s64 blksize;
+};
+
+#define ORANGEFS_LOOKUP_LINK_NO_FOLLOW 0
+
+/* pint-dev.h ***************************************************************/
+
+/* parameter structure used in ORANGEFS_DEV_DEBUG ioctl command */
+struct dev_mask_info_s {
+	enum {
+		KERNEL_MASK,
+		CLIENT_MASK,
+	} mask_type;
+	__u64 mask_value;
+};
+
+struct dev_mask2_info_s {
+	__u64 mask1_value;
+	__u64 mask2_value;
+};
+
+/* pvfs2-util.h *************************************************************/
+__s32 ORANGEFS_util_translate_mode(int mode);
+
+/* pvfs2-debug.h ************************************************************/
+#include "orangefs-debug.h"
+
+/* pvfs2-internal.h *********************************************************/
+#define llu(x) (unsigned long long)(x)
+#define lld(x) (long long)(x)
+
+/* pint-dev-shared.h ********************************************************/
+#define ORANGEFS_DEV_MAGIC 'k'
+
+#define ORANGEFS_READDIR_DEFAULT_DESC_COUNT  5
+
+#define DEV_GET_MAGIC           0x1
+#define DEV_GET_MAX_UPSIZE      0x2
+#define DEV_GET_MAX_DOWNSIZE    0x3
+#define DEV_MAP                 0x4
+#define DEV_REMOUNT_ALL         0x5
+#define DEV_DEBUG               0x6
+#define DEV_UPSTREAM            0x7
+#define DEV_CLIENT_MASK         0x8
+#define DEV_CLIENT_STRING       0x9
+#define DEV_MAX_NR              0xa
+
+/* supported ioctls, codes are with respect to user-space */
+enum {
+	ORANGEFS_DEV_GET_MAGIC = _IOW(ORANGEFS_DEV_MAGIC, DEV_GET_MAGIC, __s32),
+	ORANGEFS_DEV_GET_MAX_UPSIZE =
+	    _IOW(ORANGEFS_DEV_MAGIC, DEV_GET_MAX_UPSIZE, __s32),
+	ORANGEFS_DEV_GET_MAX_DOWNSIZE =
+	    _IOW(ORANGEFS_DEV_MAGIC, DEV_GET_MAX_DOWNSIZE, __s32),
+	ORANGEFS_DEV_MAP = _IO(ORANGEFS_DEV_MAGIC, DEV_MAP),
+	ORANGEFS_DEV_REMOUNT_ALL = _IO(ORANGEFS_DEV_MAGIC, DEV_REMOUNT_ALL),
+	ORANGEFS_DEV_DEBUG = _IOR(ORANGEFS_DEV_MAGIC, DEV_DEBUG, __s32),
+	ORANGEFS_DEV_UPSTREAM = _IOW(ORANGEFS_DEV_MAGIC, DEV_UPSTREAM, int),
+	ORANGEFS_DEV_CLIENT_MASK = _IOW(ORANGEFS_DEV_MAGIC,
+				    DEV_CLIENT_MASK,
+				    struct dev_mask2_info_s),
+	ORANGEFS_DEV_CLIENT_STRING = _IOW(ORANGEFS_DEV_MAGIC,
+				      DEV_CLIENT_STRING,
+				      char *),
+	ORANGEFS_DEV_MAXNR = DEV_MAX_NR,
+};
+
+/*
+ * version number for use in communicating between kernel space and user
+ * space. Zero signifies the upstream version of the kernel module.
+ */
+#define ORANGEFS_KERNEL_PROTO_VERSION 0
+#define ORANGEFS_MINIMUM_USERSPACE_VERSION 20903
+
+/*
+ * describes memory regions to map in the ORANGEFS_DEV_MAP ioctl.
+ * NOTE: See devorangefs-req.c for 32 bit compat structure.
+ * Since this structure has a variable-sized layout that is different
+ * on 32 and 64 bit platforms, we need to normalize to a 64 bit layout
+ * on such systems before servicing ioctl calls from user-space binaries
+ * that may be 32 bit!
+ */
+struct ORANGEFS_dev_map_desc {
+	void __user *ptr;
+	__s32 total_size;
+	__s32 size;
+	__s32 count;
+};
+
+/* gossip.h *****************************************************************/
+
+extern __u64 orangefs_gossip_debug_mask;
+
+/* try to avoid function call overhead by checking masks in macro */
+#define gossip_debug(mask, fmt, ...)					\
+do {									\
+	if (orangefs_gossip_debug_mask & (mask))			\
+		printk(KERN_DEBUG fmt, ##__VA_ARGS__);			\
+} while (0)
+
+#define gossip_err pr_err

linux-7.2.3/fs/orangefs/super.c

@@ -0,0 +1,664 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ *
+ * See COPYING in top-level directory.
+ */
+
+#include "protocol.h"
+#include "orangefs-kernel.h"
+#include "orangefs-bufmap.h"
+
+#include <linux/hashtable.h>
+#include <linux/seq_file.h>
+
+/* a cache for orangefs-inode objects (i.e. orangefs inode private data) */
+static struct kmem_cache *orangefs_inode_cache;
+
+/* list for storing orangefs specific superblocks in use */
+LIST_HEAD(orangefs_superblocks);
+
+DEFINE_SPINLOCK(orangefs_superblocks_lock);
+
+enum {
+	Opt_acl,
+	Opt_intr,
+	Opt_local_lock,
+};
+
+const struct fs_parameter_spec orangefs_fs_param_spec[] = {
+	fsparam_flag	("acl",			Opt_acl),
+	fsparam_flag	("intr",		Opt_intr),
+	fsparam_flag	("local_lock",		Opt_local_lock),
+	{}
+};
+
+uint64_t orangefs_features;
+
+static int orangefs_show_options(struct seq_file *m, struct dentry *root)
+{
+	struct orangefs_sb_info_s *orangefs_sb = ORANGEFS_SB(root->d_sb);
+
+	if (root->d_sb->s_flags & SB_POSIXACL)
+		seq_puts(m, ",acl");
+	if (orangefs_sb->flags & ORANGEFS_OPT_INTR)
+		seq_puts(m, ",intr");
+	if (orangefs_sb->flags & ORANGEFS_OPT_LOCAL_LOCK)
+		seq_puts(m, ",local_lock");
+	return 0;
+}
+
+static int orangefs_parse_param(struct fs_context *fc,
+		struct fs_parameter *param)
+{
+	struct orangefs_sb_info_s *orangefs_sb = fc->s_fs_info;
+	struct fs_parse_result result;
+	int opt;
+
+	opt = fs_parse(fc, orangefs_fs_param_spec, param, &result);
+	if (opt < 0)
+		return opt;
+
+	switch (opt) {
+	case Opt_acl:
+		fc->sb_flags |= SB_POSIXACL;
+		break;
+	case Opt_intr:
+		orangefs_sb->flags |= ORANGEFS_OPT_INTR;
+		break;
+	case Opt_local_lock:
+		orangefs_sb->flags |= ORANGEFS_OPT_LOCAL_LOCK;
+		break;
+	}
+
+	return 0;
+}
+
+static void orangefs_inode_cache_ctor(void *req)
+{
+	struct orangefs_inode_s *orangefs_inode = req;
+
+	inode_init_once(&orangefs_inode->vfs_inode);
+	init_rwsem(&orangefs_inode->xattr_sem);
+}
+
+static struct inode *orangefs_alloc_inode(struct super_block *sb)
+{
+	struct orangefs_inode_s *orangefs_inode;
+
+	orangefs_inode = alloc_inode_sb(sb, orangefs_inode_cache, GFP_KERNEL);
+	if (!orangefs_inode)
+		return NULL;
+
+	/*
+	 * We want to clear everything except for rw_semaphore and the
+	 * vfs_inode.
+	 */
+	memset(&orangefs_inode->refn.khandle, 0, 16);
+	orangefs_inode->refn.fs_id = ORANGEFS_FS_ID_NULL;
+	orangefs_inode->last_failed_block_index_read = 0;
+	memset(orangefs_inode->link_target, 0, sizeof(orangefs_inode->link_target));
+
+	gossip_debug(GOSSIP_SUPER_DEBUG,
+		     "orangefs_alloc_inode: allocated %p\n",
+		     &orangefs_inode->vfs_inode);
+	return &orangefs_inode->vfs_inode;
+}
+
+static void orangefs_free_inode(struct inode *inode)
+{
+	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
+	struct orangefs_cached_xattr *cx;
+	struct hlist_node *tmp;
+	int i;
+
+	hash_for_each_safe(orangefs_inode->xattr_cache, i, tmp, cx, node) {
+		hlist_del(&cx->node);
+		kfree(cx);
+	}
+
+	kmem_cache_free(orangefs_inode_cache, orangefs_inode);
+}
+
+static void orangefs_destroy_inode(struct inode *inode)
+{
+	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
+
+	gossip_debug(GOSSIP_SUPER_DEBUG,
+			"%s: deallocated %p destroying inode %pU\n",
+			__func__, orangefs_inode, get_khandle_from_ino(inode));
+}
+
+static int orangefs_write_inode(struct inode *inode,
+				struct writeback_control *wbc)
+{
+	gossip_debug(GOSSIP_SUPER_DEBUG, "orangefs_write_inode\n");
+	return orangefs_inode_setattr(inode);
+}
+
+/*
+ * NOTE: information filled in here is typically reflected in the
+ * output of the system command 'df'
+*/
+static int orangefs_statfs(struct dentry *dentry, struct kstatfs *buf)
+{
+	int ret = -ENOMEM;
+	struct orangefs_kernel_op_s *new_op = NULL;
+	int flags = 0;
+	struct super_block *sb = NULL;
+
+	sb = dentry->d_sb;
+
+	gossip_debug(GOSSIP_SUPER_DEBUG,
+			"%s: called on sb %p (fs_id is %d)\n",
+			__func__,
+			sb,
+			(int)(ORANGEFS_SB(sb)->fs_id));
+
+	new_op = op_alloc(ORANGEFS_VFS_OP_STATFS);
+	if (!new_op)
+		return ret;
+	new_op->upcall.req.statfs.fs_id = ORANGEFS_SB(sb)->fs_id;
+
+	if (ORANGEFS_SB(sb)->flags & ORANGEFS_OPT_INTR)
+		flags = ORANGEFS_OP_INTERRUPTIBLE;
+
+	ret = service_operation(new_op, "orangefs_statfs", flags);
+
+	if (new_op->downcall.status < 0)
+		goto out_op_release;
+
+	gossip_debug(GOSSIP_SUPER_DEBUG,
+		     "%s: got %ld blocks available | "
+		     "%ld blocks total | %ld block size | "
+		     "%ld files total | %ld files avail\n",
+		     __func__,
+		     (long)new_op->downcall.resp.statfs.blocks_avail,
+		     (long)new_op->downcall.resp.statfs.blocks_total,
+		     (long)new_op->downcall.resp.statfs.block_size,
+		     (long)new_op->downcall.resp.statfs.files_total,
+		     (long)new_op->downcall.resp.statfs.files_avail);
+
+	buf->f_type = sb->s_magic;
+	buf->f_fsid.val[0] = ORANGEFS_SB(sb)->fs_id;
+	buf->f_fsid.val[1] = ORANGEFS_SB(sb)->id;
+	buf->f_bsize = new_op->downcall.resp.statfs.block_size;
+	buf->f_namelen = ORANGEFS_NAME_MAX;
+
+	buf->f_blocks = (sector_t) new_op->downcall.resp.statfs.blocks_total;
+	buf->f_bfree = (sector_t) new_op->downcall.resp.statfs.blocks_avail;
+	buf->f_bavail = (sector_t) new_op->downcall.resp.statfs.blocks_avail;
+	buf->f_files = (sector_t) new_op->downcall.resp.statfs.files_total;
+	buf->f_ffree = (sector_t) new_op->downcall.resp.statfs.files_avail;
+	buf->f_frsize = 0;
+
+out_op_release:
+	op_release(new_op);
+	gossip_debug(GOSSIP_SUPER_DEBUG, "%s: returning %d\n", __func__, ret);
+	return ret;
+}
+
+/*
+ * Remount as initiated by VFS layer.  We just need to reparse the mount
+ * options, no need to signal pvfs2-client-core about it.
+ */
+static int orangefs_reconfigure(struct fs_context *fc)
+{
+	struct super_block *sb = fc->root->d_sb;
+	struct orangefs_sb_info_s *orangefs_sb = ORANGEFS_SB(sb);
+	struct orangefs_sb_info_s *revised = fc->s_fs_info;
+	unsigned int flags;
+
+	flags = orangefs_sb->flags;
+	flags &= ~(ORANGEFS_OPT_INTR | ORANGEFS_OPT_LOCAL_LOCK);
+	flags |= revised->flags;
+	WRITE_ONCE(orangefs_sb->flags, flags);
+
+	gossip_debug(GOSSIP_SUPER_DEBUG, "orangefs_reconfigure: called\n");
+	return 0;
+}
+
+/*
+ * Remount as initiated by pvfs2-client-core on restart.  This is used to
+ * repopulate mount information left from previous pvfs2-client-core.
+ *
+ * the idea here is that given a valid superblock, we're
+ * re-initializing the user space client with the initial mount
+ * information specified when the super block was first initialized.
+ * this is very different than the first initialization/creation of a
+ * superblock.  we use the special service_priority_operation to make
+ * sure that the mount gets ahead of any other pending operation that
+ * is waiting for servicing.  this means that the pvfs2-client won't
+ * fail to start several times for all other pending operations before
+ * the client regains all of the mount information from us.
+ * NOTE: this function assumes that the request_mutex is already acquired!
+ */
+int orangefs_remount(struct orangefs_sb_info_s *orangefs_sb)
+{
+	struct orangefs_kernel_op_s *new_op;
+	int ret = -EINVAL;
+
+	gossip_debug(GOSSIP_SUPER_DEBUG, "orangefs_remount: called\n");
+
+	new_op = op_alloc(ORANGEFS_VFS_OP_FS_MOUNT);
+	if (!new_op)
+		return -ENOMEM;
+	strscpy(new_op->upcall.req.fs_mount.orangefs_config_server,
+		orangefs_sb->devname);
+
+	gossip_debug(GOSSIP_SUPER_DEBUG,
+		     "Attempting ORANGEFS Remount via host %s\n",
+		     new_op->upcall.req.fs_mount.orangefs_config_server);
+
+	/*
+	 * we assume that the calling function has already acquired the
+	 * request_mutex to prevent other operations from bypassing
+	 * this one
+	 */
+	ret = service_operation(new_op, "orangefs_remount",
+		ORANGEFS_OP_PRIORITY | ORANGEFS_OP_NO_MUTEX);
+	gossip_debug(GOSSIP_SUPER_DEBUG,
+		     "orangefs_remount: mount got return value of %d\n",
+		     ret);
+	if (ret == 0) {
+		/*
+		 * store the id assigned to this sb -- it's just a
+		 * short-lived mapping that the system interface uses
+		 * to map this superblock to a particular mount entry
+		 */
+		orangefs_sb->id = new_op->downcall.resp.fs_mount.id;
+		orangefs_sb->mount_pending = 0;
+	}
+
+	op_release(new_op);
+
+	if (orangefs_userspace_version >= 20906) {
+		new_op = op_alloc(ORANGEFS_VFS_OP_FEATURES);
+		if (!new_op)
+			return -ENOMEM;
+		new_op->upcall.req.features.features = 0;
+		ret = service_operation(new_op, "orangefs_features",
+		    ORANGEFS_OP_PRIORITY | ORANGEFS_OP_NO_MUTEX);
+		if (!ret)
+			orangefs_features =
+			    new_op->downcall.resp.features.features;
+		else
+			orangefs_features = 0;
+		op_release(new_op);
+	} else {
+		orangefs_features = 0;
+	}
+
+	return ret;
+}
+
+int fsid_key_table_initialize(void)
+{
+	return 0;
+}
+
+void fsid_key_table_finalize(void)
+{
+}
+
+static const struct super_operations orangefs_s_ops = {
+	.alloc_inode = orangefs_alloc_inode,
+	.free_inode = orangefs_free_inode,
+	.destroy_inode = orangefs_destroy_inode,
+	.write_inode = orangefs_write_inode,
+	.drop_inode = inode_just_drop,
+	.statfs = orangefs_statfs,
+	.show_options = orangefs_show_options,
+};
+
+static struct dentry *orangefs_fh_to_dentry(struct super_block *sb,
+				  struct fid *fid,
+				  int fh_len,
+				  int fh_type)
+{
+	struct orangefs_object_kref refn;
+
+	if (fh_len < 5 || fh_type > 2)
+		return NULL;
+
+	ORANGEFS_khandle_from(&(refn.khandle), fid->raw, 16);
+	refn.fs_id = (u32) fid->raw[4];
+	gossip_debug(GOSSIP_SUPER_DEBUG,
+		     "fh_to_dentry: handle %pU, fs_id %d\n",
+		     &refn.khandle,
+		     refn.fs_id);
+
+	return d_obtain_alias(orangefs_iget(sb, &refn));
+}
+
+static int orangefs_encode_fh(struct inode *inode,
+		    __u32 *fh,
+		    int *max_len,
+		    struct inode *parent)
+{
+	int len = parent ? 10 : 5;
+	int type = 1;
+	struct orangefs_object_kref refn;
+
+	if (*max_len < len) {
+		gossip_err("fh buffer is too small for encoding\n");
+		*max_len = len;
+		type = 255;
+		goto out;
+	}
+
+	refn = ORANGEFS_I(inode)->refn;
+	ORANGEFS_khandle_to(&refn.khandle, fh, 16);
+	fh[4] = refn.fs_id;
+
+	gossip_debug(GOSSIP_SUPER_DEBUG,
+		     "Encoding fh: handle %pU, fsid %u\n",
+		     &refn.khandle,
+		     refn.fs_id);
+
+
+	if (parent) {
+		refn = ORANGEFS_I(parent)->refn;
+		ORANGEFS_khandle_to(&refn.khandle, (char *) fh + 20, 16);
+		fh[9] = refn.fs_id;
+
+		type = 2;
+		gossip_debug(GOSSIP_SUPER_DEBUG,
+			     "Encoding parent: handle %pU, fsid %u\n",
+			     &refn.khandle,
+			     refn.fs_id);
+	}
+	*max_len = len;
+
+out:
+	return type;
+}
+
+static const struct export_operations orangefs_export_ops = {
+	.encode_fh = orangefs_encode_fh,
+	.fh_to_dentry = orangefs_fh_to_dentry,
+};
+
+static int orangefs_unmount(int id, __s32 fs_id, const char *devname)
+{
+	struct orangefs_kernel_op_s *op;
+	int r;
+	op = op_alloc(ORANGEFS_VFS_OP_FS_UMOUNT);
+	if (!op)
+		return -ENOMEM;
+	op->upcall.req.fs_umount.id = id;
+	op->upcall.req.fs_umount.fs_id = fs_id;
+	strscpy(op->upcall.req.fs_umount.orangefs_config_server, devname);
+	r = service_operation(op, "orangefs_fs_umount", 0);
+	/* Not much to do about an error here. */
+	if (r)
+		gossip_err("orangefs_unmount: service_operation %d\n", r);
+	op_release(op);
+	return r;
+}
+
+static int orangefs_fill_sb(struct super_block *sb,
+			    struct fs_context *fc,
+			    struct orangefs_fs_mount_response *fs_mount)
+{
+	int ret;
+	struct inode *root;
+	struct dentry *root_dentry;
+	struct orangefs_object_kref root_object;
+
+	ORANGEFS_SB(sb)->sb = sb;
+
+	ORANGEFS_SB(sb)->root_khandle = fs_mount->root_khandle;
+	ORANGEFS_SB(sb)->fs_id = fs_mount->fs_id;
+	ORANGEFS_SB(sb)->id = fs_mount->id;
+
+	/* Hang the xattr handlers off the superblock */
+	sb->s_xattr = orangefs_xattr_handlers;
+	sb->s_magic = ORANGEFS_SUPER_MAGIC;
+	sb->s_op = &orangefs_s_ops;
+	set_default_d_op(sb, &orangefs_dentry_operations);
+
+	sb->s_blocksize = PAGE_SIZE;
+	sb->s_blocksize_bits = PAGE_SHIFT;
+	sb->s_maxbytes = MAX_LFS_FILESIZE;
+
+	ret = super_setup_bdi(sb);
+	if (ret)
+		return ret;
+
+	root_object.khandle = ORANGEFS_SB(sb)->root_khandle;
+	root_object.fs_id = ORANGEFS_SB(sb)->fs_id;
+	gossip_debug(GOSSIP_SUPER_DEBUG,
+		     "get inode %pU, fsid %d\n",
+		     &root_object.khandle,
+		     root_object.fs_id);
+
+	root = orangefs_iget(sb, &root_object);
+	if (IS_ERR(root))
+		return PTR_ERR(root);
+
+	gossip_debug(GOSSIP_SUPER_DEBUG,
+		     "Allocated root inode [%p] with mode %x\n",
+		     root,
+		     root->i_mode);
+
+	/* allocates and places root dentry in dcache */
+	root_dentry = d_make_root(root);
+	if (!root_dentry)
+		return -ENOMEM;
+
+	sb->s_export_op = &orangefs_export_ops;
+	sb->s_root = root_dentry;
+	return 0;
+}
+
+static int orangefs_get_tree(struct fs_context *fc)
+{
+	int ret;
+	struct super_block *sb = ERR_PTR(-EINVAL);
+	struct orangefs_kernel_op_s *new_op;
+
+	if (!fc->source)
+		return invalf(fc, "Device name not specified.\n");
+
+	gossip_debug(GOSSIP_SUPER_DEBUG,
+		     "orangefs_mount: called with devname %s\n",
+		     fc->source);
+
+	new_op = op_alloc(ORANGEFS_VFS_OP_FS_MOUNT);
+	if (!new_op)
+		return -ENOMEM;
+
+	strscpy(new_op->upcall.req.fs_mount.orangefs_config_server, fc->source);
+
+	gossip_debug(GOSSIP_SUPER_DEBUG,
+		     "Attempting ORANGEFS Mount via host %s\n",
+		     new_op->upcall.req.fs_mount.orangefs_config_server);
+
+	ret = service_operation(new_op, "orangefs_mount", 0);
+	gossip_debug(GOSSIP_SUPER_DEBUG,
+		     "orangefs_mount: mount got return value of %d\n", ret);
+	if (ret)
+		goto free_op;
+
+	if (new_op->downcall.resp.fs_mount.fs_id == ORANGEFS_FS_ID_NULL) {
+		gossip_err("ERROR: Retrieved null fs_id\n");
+		ret = -EINVAL;
+		goto free_op;
+	}
+
+	sb = sget_fc(fc, NULL, set_anon_super_fc);
+
+	if (IS_ERR(sb)) {
+		ret = PTR_ERR(sb);
+		orangefs_unmount(new_op->downcall.resp.fs_mount.id,
+				 new_op->downcall.resp.fs_mount.fs_id,
+				 fc->source);
+		goto free_op;
+	}
+
+	/* init our private orangefs sb info */
+	ret = orangefs_fill_sb(sb, fc, &new_op->downcall.resp.fs_mount);
+
+	if (ret)
+		goto free_sb_and_op;
+
+	/*
+	 * on successful mount, store the devname and data
+	 * used
+	 */
+	strscpy(ORANGEFS_SB(sb)->devname, fc->source);
+
+	/* mount_pending must be cleared */
+	ORANGEFS_SB(sb)->mount_pending = 0;
+
+	/*
+	 * finally, add this sb to our list of known orangefs
+	 * sb's
+	 */
+	gossip_debug(GOSSIP_SUPER_DEBUG,
+		     "Adding SB %p to orangefs superblocks\n",
+		     ORANGEFS_SB(sb));
+	spin_lock(&orangefs_superblocks_lock);
+	list_add_tail(&ORANGEFS_SB(sb)->list, &orangefs_superblocks);
+	spin_unlock(&orangefs_superblocks_lock);
+	op_release(new_op);
+
+	/* Must be removed from the list now. */
+	ORANGEFS_SB(sb)->no_list = 0;
+
+	if (orangefs_userspace_version >= 20906) {
+		new_op = op_alloc(ORANGEFS_VFS_OP_FEATURES);
+		if (!new_op)
+			return -ENOMEM;
+		new_op->upcall.req.features.features = 0;
+		ret = service_operation(new_op, "orangefs_features", 0);
+		orangefs_features = new_op->downcall.resp.features.features;
+		op_release(new_op);
+	} else {
+		orangefs_features = 0;
+	}
+
+	fc->root = dget(sb->s_root);
+	return 0;
+
+free_sb_and_op:
+	/* Will call orangefs_kill_sb with sb not in list. */
+	ORANGEFS_SB(sb)->no_list = 1;
+	/* ORANGEFS_VFS_OP_FS_UMOUNT is done by orangefs_kill_sb. */
+	deactivate_locked_super(sb);
+free_op:
+	gossip_err("orangefs_mount: mount request failed with %d\n", ret);
+	if (ret == -EINVAL) {
+		gossip_err("Ensure that all orangefs-servers have the same FS configuration files\n");
+		gossip_err("Look at pvfs2-client-core log file (typically /tmp/pvfs2-client.log) for more details\n");
+	}
+
+	op_release(new_op);
+
+	return ret;
+}
+
+static void orangefs_free_fc(struct fs_context *fc)
+{
+	kfree(fc->s_fs_info);
+}
+
+static const struct fs_context_operations orangefs_context_ops = {
+	.free		= orangefs_free_fc,
+	.parse_param	= orangefs_parse_param,
+	.get_tree	= orangefs_get_tree,
+	.reconfigure	= orangefs_reconfigure,
+};
+
+/*
+ * Set up the filesystem mount context.
+ */
+int orangefs_init_fs_context(struct fs_context *fc)
+{
+	struct orangefs_sb_info_s *osi;
+
+	osi = kzalloc_obj(struct orangefs_sb_info_s);
+	if (!osi)
+		return -ENOMEM;
+
+	/*
+	 * Force any potential flags that might be set from the mount
+	 * to zero, ie, initialize to unset.
+	 */
+	fc->sb_flags_mask &= ~SB_POSIXACL;
+	osi->flags &= ~ORANGEFS_OPT_INTR;
+	osi->flags &= ~ORANGEFS_OPT_LOCAL_LOCK;
+
+	fc->s_fs_info = osi;
+	fc->ops = &orangefs_context_ops;
+	return 0;
+}
+
+void orangefs_kill_sb(struct super_block *sb)
+{
+	int r;
+	gossip_debug(GOSSIP_SUPER_DEBUG, "orangefs_kill_sb: called\n");
+
+	/* provided sb cleanup */
+	kill_anon_super(sb);
+
+	if (!ORANGEFS_SB(sb)) {
+		mutex_lock(&orangefs_request_mutex);
+		mutex_unlock(&orangefs_request_mutex);
+		return;
+	}
+	/*
+	 * issue the unmount to userspace to tell it to remove the
+	 * dynamic mount info it has for this superblock
+	 */
+	r = orangefs_unmount(ORANGEFS_SB(sb)->id, ORANGEFS_SB(sb)->fs_id,
+	    ORANGEFS_SB(sb)->devname);
+	if (!r)
+		ORANGEFS_SB(sb)->mount_pending = 1;
+
+	if (!ORANGEFS_SB(sb)->no_list) {
+		/* remove the sb from our list of orangefs specific sb's */
+		spin_lock(&orangefs_superblocks_lock);
+		/* not list_del_init */
+		__list_del_entry(&ORANGEFS_SB(sb)->list);
+		ORANGEFS_SB(sb)->list.prev = NULL;
+		spin_unlock(&orangefs_superblocks_lock);
+	}
+
+	/*
+	 * make sure that ORANGEFS_DEV_REMOUNT_ALL loop that might've seen us
+	 * gets completed before we free the dang thing.
+	 */
+	mutex_lock(&orangefs_request_mutex);
+	mutex_unlock(&orangefs_request_mutex);
+
+	/* free the orangefs superblock private data */
+	kfree(ORANGEFS_SB(sb));
+}
+
+int orangefs_inode_cache_initialize(void)
+{
+	orangefs_inode_cache = kmem_cache_create_usercopy(
+					"orangefs_inode_cache",
+					sizeof(struct orangefs_inode_s),
+					0,
+					0,
+					offsetof(struct orangefs_inode_s,
+						link_target),
+					sizeof_field(struct orangefs_inode_s,
+						link_target),
+					orangefs_inode_cache_ctor);
+
+	if (!orangefs_inode_cache) {
+		gossip_err("Cannot create orangefs_inode_cache\n");
+		return -ENOMEM;
+	}
+	return 0;
+}
+
+int orangefs_inode_cache_finalize(void)
+{
+	kmem_cache_destroy(orangefs_inode_cache);
+	return 0;
+}

linux-7.2.3/fs/orangefs/symlink.c

@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ *
+ * See COPYING in top-level directory.
+ */
+
+#include "protocol.h"
+#include "orangefs-kernel.h"
+#include "orangefs-bufmap.h"
+
+const struct inode_operations orangefs_symlink_inode_operations = {
+	.get_link = simple_get_link,
+	.setattr = orangefs_setattr,
+	.getattr = orangefs_getattr,
+	.listxattr = orangefs_listxattr,
+	.permission = orangefs_permission,
+	.update_time = orangefs_update_time,
+};

linux-7.2.3/fs/orangefs/upcall.h

@@ -0,0 +1,260 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ *
+ * See COPYING in top-level directory.
+ */
+
+#ifndef __UPCALL_H
+#define __UPCALL_H
+
+/*
+ * Sanitized this header file to fix
+ * 32-64 bit interaction issues between
+ * client-core and device
+ */
+struct orangefs_io_request_s {
+	__s32 __pad1;
+	__s32 buf_index;
+	__s32 count;
+	__s32 __pad2;
+	__s64 offset;
+	struct orangefs_object_kref refn;
+	enum ORANGEFS_io_type io_type;
+	__s32 readahead_size;
+};
+
+struct orangefs_lookup_request_s {
+	__s32 sym_follow;
+	__s32 __pad1;
+	struct orangefs_object_kref parent_refn;
+	char d_name[ORANGEFS_NAME_MAX];
+};
+
+struct orangefs_create_request_s {
+	struct orangefs_object_kref parent_refn;
+	struct ORANGEFS_sys_attr_s attributes;
+	char d_name[ORANGEFS_NAME_MAX];
+};
+
+struct orangefs_symlink_request_s {
+	struct orangefs_object_kref parent_refn;
+	struct ORANGEFS_sys_attr_s attributes;
+	char entry_name[ORANGEFS_NAME_MAX];
+	char target[ORANGEFS_NAME_MAX];
+};
+
+struct orangefs_getattr_request_s {
+	struct orangefs_object_kref refn;
+	__u32 mask;
+	__u32 __pad1;
+};
+
+struct orangefs_setattr_request_s {
+	struct orangefs_object_kref refn;
+	struct ORANGEFS_sys_attr_s attributes;
+};
+
+struct orangefs_remove_request_s {
+	struct orangefs_object_kref parent_refn;
+	char d_name[ORANGEFS_NAME_MAX];
+};
+
+struct orangefs_mkdir_request_s {
+	struct orangefs_object_kref parent_refn;
+	struct ORANGEFS_sys_attr_s attributes;
+	char d_name[ORANGEFS_NAME_MAX];
+};
+
+struct orangefs_readdir_request_s {
+	struct orangefs_object_kref refn;
+	__u64 token;
+	__s32 max_dirent_count;
+	__s32 buf_index;
+};
+
+struct orangefs_readdirplus_request_s {
+	struct orangefs_object_kref refn;
+	__u64 token;
+	__s32 max_dirent_count;
+	__u32 mask;
+	__s32 buf_index;
+	__s32 __pad1;
+};
+
+struct orangefs_rename_request_s {
+	struct orangefs_object_kref old_parent_refn;
+	struct orangefs_object_kref new_parent_refn;
+	char d_old_name[ORANGEFS_NAME_MAX];
+	char d_new_name[ORANGEFS_NAME_MAX];
+};
+
+struct orangefs_statfs_request_s {
+	__s32 fs_id;
+	__s32 __pad1;
+};
+
+struct orangefs_truncate_request_s {
+	struct orangefs_object_kref refn;
+	__s64 size;
+};
+
+struct orangefs_ra_cache_flush_request_s {
+	struct orangefs_object_kref refn;
+};
+
+struct orangefs_fs_mount_request_s {
+	char orangefs_config_server[ORANGEFS_MAX_SERVER_ADDR_LEN];
+};
+
+struct orangefs_fs_umount_request_s {
+	__s32 id;
+	__s32 fs_id;
+	char orangefs_config_server[ORANGEFS_MAX_SERVER_ADDR_LEN];
+};
+
+struct orangefs_getxattr_request_s {
+	struct orangefs_object_kref refn;
+	__s32 key_sz;
+	__s32 __pad1;
+	char key[ORANGEFS_MAX_XATTR_NAMELEN];
+};
+
+struct orangefs_setxattr_request_s {
+	struct orangefs_object_kref refn;
+	struct ORANGEFS_keyval_pair keyval;
+	__s32 flags;
+	__s32 __pad1;
+};
+
+struct orangefs_listxattr_request_s {
+	struct orangefs_object_kref refn;
+	__s32 requested_count;
+	__s32 __pad1;
+	__u64 token;
+};
+
+struct orangefs_removexattr_request_s {
+	struct orangefs_object_kref refn;
+	__s32 key_sz;
+	__s32 __pad1;
+	char key[ORANGEFS_MAX_XATTR_NAMELEN];
+};
+
+struct orangefs_op_cancel_s {
+	__u64 op_tag;
+};
+
+struct orangefs_fsync_request_s {
+	struct orangefs_object_kref refn;
+};
+
+enum orangefs_param_request_type {
+	ORANGEFS_PARAM_REQUEST_SET = 1,
+	ORANGEFS_PARAM_REQUEST_GET = 2
+};
+
+enum orangefs_param_request_op {
+	ORANGEFS_PARAM_REQUEST_OP_ACACHE_TIMEOUT_MSECS = 1,
+	ORANGEFS_PARAM_REQUEST_OP_ACACHE_HARD_LIMIT = 2,
+	ORANGEFS_PARAM_REQUEST_OP_ACACHE_SOFT_LIMIT = 3,
+	ORANGEFS_PARAM_REQUEST_OP_ACACHE_RECLAIM_PERCENTAGE = 4,
+	ORANGEFS_PARAM_REQUEST_OP_PERF_TIME_INTERVAL_SECS = 5,
+	ORANGEFS_PARAM_REQUEST_OP_PERF_HISTORY_SIZE = 6,
+	ORANGEFS_PARAM_REQUEST_OP_PERF_RESET = 7,
+	ORANGEFS_PARAM_REQUEST_OP_NCACHE_TIMEOUT_MSECS = 8,
+	ORANGEFS_PARAM_REQUEST_OP_NCACHE_HARD_LIMIT = 9,
+	ORANGEFS_PARAM_REQUEST_OP_NCACHE_SOFT_LIMIT = 10,
+	ORANGEFS_PARAM_REQUEST_OP_NCACHE_RECLAIM_PERCENTAGE = 11,
+	ORANGEFS_PARAM_REQUEST_OP_STATIC_ACACHE_TIMEOUT_MSECS = 12,
+	ORANGEFS_PARAM_REQUEST_OP_STATIC_ACACHE_HARD_LIMIT = 13,
+	ORANGEFS_PARAM_REQUEST_OP_STATIC_ACACHE_SOFT_LIMIT = 14,
+	ORANGEFS_PARAM_REQUEST_OP_STATIC_ACACHE_RECLAIM_PERCENTAGE = 15,
+	ORANGEFS_PARAM_REQUEST_OP_CLIENT_DEBUG = 16,
+	ORANGEFS_PARAM_REQUEST_OP_CCACHE_TIMEOUT_SECS = 17,
+	ORANGEFS_PARAM_REQUEST_OP_CCACHE_HARD_LIMIT = 18,
+	ORANGEFS_PARAM_REQUEST_OP_CCACHE_SOFT_LIMIT = 19,
+	ORANGEFS_PARAM_REQUEST_OP_CCACHE_RECLAIM_PERCENTAGE = 20,
+	ORANGEFS_PARAM_REQUEST_OP_CAPCACHE_TIMEOUT_SECS = 21,
+	ORANGEFS_PARAM_REQUEST_OP_CAPCACHE_HARD_LIMIT = 22,
+	ORANGEFS_PARAM_REQUEST_OP_CAPCACHE_SOFT_LIMIT = 23,
+	ORANGEFS_PARAM_REQUEST_OP_CAPCACHE_RECLAIM_PERCENTAGE = 24,
+	ORANGEFS_PARAM_REQUEST_OP_TWO_MASK_VALUES = 25,
+	ORANGEFS_PARAM_REQUEST_OP_READAHEAD_SIZE = 26,
+	ORANGEFS_PARAM_REQUEST_OP_READAHEAD_COUNT = 27,
+	ORANGEFS_PARAM_REQUEST_OP_READAHEAD_COUNT_SIZE = 28,
+	ORANGEFS_PARAM_REQUEST_OP_READAHEAD_READCNT = 29,
+};
+
+struct orangefs_param_request_s {
+	enum orangefs_param_request_type type;
+	enum orangefs_param_request_op op;
+	union {
+		__s64 value64;
+		__s32 value32[2];
+	} u;
+	char s_value[ORANGEFS_MAX_DEBUG_STRING_LEN];
+};
+
+enum orangefs_perf_count_request_type {
+	ORANGEFS_PERF_COUNT_REQUEST_ACACHE = 1,
+	ORANGEFS_PERF_COUNT_REQUEST_NCACHE = 2,
+	ORANGEFS_PERF_COUNT_REQUEST_CAPCACHE = 3,
+};
+
+struct orangefs_perf_count_request_s {
+	enum orangefs_perf_count_request_type type;
+	__s32 __pad1;
+};
+
+struct orangefs_fs_key_request_s {
+	__s32 fsid;
+	__s32 __pad1;
+};
+
+/* 2.9.6 */
+struct orangefs_features_request_s {
+	__u64 features;
+};
+
+struct orangefs_upcall_s {
+	__s32 type;
+	__u32 uid;
+	__u32 gid;
+	int pid;
+	int tgid;
+	/* Trailers unused but must be retained for protocol compatibility. */
+	__s64 trailer_size;
+	char *trailer_buf;
+
+	union {
+		struct orangefs_io_request_s io;
+		struct orangefs_lookup_request_s lookup;
+		struct orangefs_create_request_s create;
+		struct orangefs_symlink_request_s sym;
+		struct orangefs_getattr_request_s getattr;
+		struct orangefs_setattr_request_s setattr;
+		struct orangefs_remove_request_s remove;
+		struct orangefs_mkdir_request_s mkdir;
+		struct orangefs_readdir_request_s readdir;
+		struct orangefs_readdirplus_request_s readdirplus;
+		struct orangefs_rename_request_s rename;
+		struct orangefs_statfs_request_s statfs;
+		struct orangefs_truncate_request_s truncate;
+		struct orangefs_ra_cache_flush_request_s ra_cache_flush;
+		struct orangefs_fs_mount_request_s fs_mount;
+		struct orangefs_fs_umount_request_s fs_umount;
+		struct orangefs_getxattr_request_s getxattr;
+		struct orangefs_setxattr_request_s setxattr;
+		struct orangefs_listxattr_request_s listxattr;
+		struct orangefs_removexattr_request_s removexattr;
+		struct orangefs_op_cancel_s cancel;
+		struct orangefs_fsync_request_s fsync;
+		struct orangefs_param_request_s param;
+		struct orangefs_perf_count_request_s perf_count;
+		struct orangefs_fs_key_request_s fs_key;
+		struct orangefs_features_request_s features;
+	} req;
+};
+
+#endif /* __UPCALL_H */

linux-7.2.3/fs/orangefs/waitqueue.c

@@ -0,0 +1,373 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ * (C) 2011 Omnibond Systems
+ *
+ * Changes by Acxiom Corporation to implement generic service_operation()
+ * function, Copyright Acxiom Corporation, 2005.
+ *
+ * See COPYING in top-level directory.
+ */
+
+/*
+ *  In-kernel waitqueue operations.
+ */
+
+#include "protocol.h"
+#include "orangefs-kernel.h"
+#include "orangefs-bufmap.h"
+
+static int wait_for_matching_downcall(struct orangefs_kernel_op_s *op,
+		long timeout,
+		int flags)
+			__acquires(op->lock);
+static void orangefs_clean_up_interrupted_operation(struct orangefs_kernel_op_s *op)
+	__releases(op->lock);
+
+/*
+ * What we do in this function is to walk the list of operations that are
+ * present in the request queue and mark them as purged.
+ * NOTE: This is called from the device close after client-core has
+ * guaranteed that no new operations could appear on the list since the
+ * client-core is anyway going to exit.
+ */
+void purge_waiting_ops(void)
+{
+	struct orangefs_kernel_op_s *op, *tmp;
+
+	spin_lock(&orangefs_request_list_lock);
+	list_for_each_entry_safe(op, tmp, &orangefs_request_list, list) {
+		gossip_debug(GOSSIP_WAIT_DEBUG,
+			     "pvfs2-client-core: purging op tag %llu %s\n",
+			     llu(op->tag),
+			     get_opname_string(op));
+		set_op_state_purged(op);
+		gossip_debug(GOSSIP_DEV_DEBUG,
+			     "%s: op:%s: op_state:%d: process:%s:\n",
+			     __func__,
+			     get_opname_string(op),
+			     op->op_state,
+			     current->comm);
+	}
+	spin_unlock(&orangefs_request_list_lock);
+}
+
+/*
+ * submits a ORANGEFS operation and waits for it to complete
+ *
+ * Note op->downcall.status will contain the status of the operation (in
+ * errno format), whether provided by pvfs2-client or a result of failure to
+ * service the operation.  If the caller wishes to distinguish, then
+ * op->state can be checked to see if it was serviced or not.
+ *
+ * Returns contents of op->downcall.status for convenience
+ */
+int service_operation(struct orangefs_kernel_op_s *op,
+		      const char *op_name,
+		      int flags)
+{
+	long timeout = MAX_SCHEDULE_TIMEOUT;
+	int ret = 0;
+
+	DEFINE_WAIT(wait_entry);
+
+	op->upcall.tgid = current->tgid;
+	op->upcall.pid = current->pid;
+
+retry_servicing:
+	op->downcall.status = 0;
+	gossip_debug(GOSSIP_WAIT_DEBUG,
+		     "%s: %s op:%p: process:%s: pid:%d:\n",
+		     __func__,
+		     op_name,
+		     op,
+		     current->comm,
+		     current->pid);
+
+	/*
+	 * If ORANGEFS_OP_NO_MUTEX was set in flags, we need to avoid
+	 * acquiring the request_mutex because we're servicing a
+	 * high priority remount operation and the request_mutex is
+	 * already taken.
+	 */
+	if (!(flags & ORANGEFS_OP_NO_MUTEX)) {
+		if (flags & ORANGEFS_OP_INTERRUPTIBLE)
+			ret = mutex_lock_interruptible(&orangefs_request_mutex);
+		else
+			ret = mutex_lock_killable(&orangefs_request_mutex);
+		/*
+		 * check to see if we were interrupted while waiting for
+		 * mutex
+		 */
+		if (ret < 0) {
+			op->downcall.status = ret;
+			gossip_debug(GOSSIP_WAIT_DEBUG,
+				     "%s: service_operation interrupted.\n",
+				     __func__);
+			return ret;
+		}
+	}
+
+	/* queue up the operation */
+	spin_lock(&orangefs_request_list_lock);
+	spin_lock(&op->lock);
+	set_op_state_waiting(op);
+	gossip_debug(GOSSIP_DEV_DEBUG,
+		     "%s: op:%s: op_state:%d: process:%s:\n",
+		     __func__,
+		     get_opname_string(op),
+		     op->op_state,
+		     current->comm);
+	/* add high priority remount op to the front of the line. */
+	if (flags & ORANGEFS_OP_PRIORITY)
+		list_add(&op->list, &orangefs_request_list);
+	else
+		list_add_tail(&op->list, &orangefs_request_list);
+	spin_unlock(&op->lock);
+	wake_up_interruptible(&orangefs_request_list_waitq);
+	if (!__is_daemon_in_service()) {
+		gossip_debug(GOSSIP_WAIT_DEBUG,
+			     "%s:client core is NOT in service.\n",
+			     __func__);
+		/*
+		 * Don't wait for the userspace component to return if
+		 * the filesystem is being umounted anyway.
+		 */
+		if (op->upcall.type == ORANGEFS_VFS_OP_FS_UMOUNT)
+			timeout = 0;
+		else
+			timeout = op_timeout_secs * HZ;
+	}
+	spin_unlock(&orangefs_request_list_lock);
+
+	if (!(flags & ORANGEFS_OP_NO_MUTEX))
+		mutex_unlock(&orangefs_request_mutex);
+
+	ret = wait_for_matching_downcall(op, timeout, flags);
+	gossip_debug(GOSSIP_WAIT_DEBUG,
+		     "%s: wait_for_matching_downcall returned %d for %p\n",
+		     __func__,
+		     ret,
+		     op);
+
+	/* got matching downcall; make sure status is in errno format */
+	if (!ret) {
+		spin_unlock(&op->lock);
+		op->downcall.status =
+		    orangefs_normalize_to_errno(op->downcall.status);
+		ret = op->downcall.status;
+		goto out;
+	}
+
+	/* failed to get matching downcall */
+	if (ret == -ETIMEDOUT) {
+		gossip_err("%s: %s -- wait timed out; aborting attempt.\n",
+			   __func__,
+			   op_name);
+	}
+
+	/*
+	 * remove a waiting op from the request list or
+	 * remove an in-progress op from the in-progress list.
+	 */
+	orangefs_clean_up_interrupted_operation(op);
+
+	op->downcall.status = ret;
+	/* retry if operation has not been serviced and if requested */
+	if (ret == -EAGAIN) {
+		op->attempts++;
+		timeout = op_timeout_secs * HZ;
+		gossip_debug(GOSSIP_WAIT_DEBUG,
+			     "orangefs: tag %llu (%s)"
+			     " -- operation to be retried (%d attempt)\n",
+			     llu(op->tag),
+			     op_name,
+			     op->attempts);
+
+		/*
+		 * io ops (ops that use the shared memory buffer) have
+		 * to be returned to their caller for a retry. Other ops
+		 * can just be recycled here.
+		 */
+		if (!op->uses_shared_memory)
+			goto retry_servicing;
+	}
+
+out:
+	gossip_debug(GOSSIP_WAIT_DEBUG,
+		     "%s: %s returning: %d for %p.\n",
+		     __func__,
+		     op_name,
+		     ret,
+		     op);
+	return ret;
+}
+
+/* This can get called on an I/O op if it had a bad service_operation. */
+bool orangefs_cancel_op_in_progress(struct orangefs_kernel_op_s *op)
+{
+	u64 tag = op->tag;
+	if (!op_state_in_progress(op))
+		return false;
+
+	op->slot_to_free = op->upcall.req.io.buf_index;
+	memset(&op->upcall, 0, sizeof(op->upcall));
+	memset(&op->downcall, 0, sizeof(op->downcall));
+	op->upcall.type = ORANGEFS_VFS_OP_CANCEL;
+	op->upcall.req.cancel.op_tag = tag;
+	op->downcall.type = ORANGEFS_VFS_OP_INVALID;
+	op->downcall.status = -1;
+	orangefs_new_tag(op);
+
+	spin_lock(&orangefs_request_list_lock);
+	/* orangefs_request_list_lock is enough of a barrier here */
+	if (!__is_daemon_in_service()) {
+		spin_unlock(&orangefs_request_list_lock);
+		return false;
+	}
+	spin_lock(&op->lock);
+	set_op_state_waiting(op);
+	gossip_debug(GOSSIP_DEV_DEBUG,
+		     "%s: op:%s: op_state:%d: process:%s:\n",
+		     __func__,
+		     get_opname_string(op),
+		     op->op_state,
+		     current->comm);
+	list_add(&op->list, &orangefs_request_list);
+	spin_unlock(&op->lock);
+	spin_unlock(&orangefs_request_list_lock);
+
+	gossip_debug(GOSSIP_WAIT_DEBUG,
+		     "Attempting ORANGEFS operation cancellation of tag %llu\n",
+		     llu(tag));
+	return true;
+}
+
+/*
+ * Change an op to the "given up" state and remove it from its list.
+ */
+static void
+	orangefs_clean_up_interrupted_operation(struct orangefs_kernel_op_s *op)
+		__releases(op->lock)
+{
+	/*
+	 * handle interrupted cases depending on what state we were in when
+	 * the interruption is detected.
+	 *
+	 * Called with op->lock held.
+	 */
+
+	/*
+	 * List manipulation code elsewhere will ignore ops that
+	 * have been given up upon.
+	 */
+	op->op_state |= OP_VFS_STATE_GIVEN_UP;
+
+	if (list_empty(&op->list)) {
+		/* caught copying to/from daemon */
+		BUG_ON(op_state_serviced(op));
+		spin_unlock(&op->lock);
+		wait_for_completion(&op->waitq);
+	} else if (op_state_waiting(op)) {
+		/*
+		 * upcall hasn't been read; remove op from upcall request
+		 * list.
+		 */
+		spin_unlock(&op->lock);
+		spin_lock(&orangefs_request_list_lock);
+		list_del_init(&op->list);
+		spin_unlock(&orangefs_request_list_lock);
+		gossip_debug(GOSSIP_WAIT_DEBUG,
+			     "Interrupted: Removed op %p from request_list\n",
+			     op);
+	} else if (op_state_in_progress(op)) {
+		/* op must be removed from the in progress htable */
+		spin_unlock(&op->lock);
+		spin_lock(&orangefs_htable_ops_in_progress_lock);
+		list_del_init(&op->list);
+		spin_unlock(&orangefs_htable_ops_in_progress_lock);
+		gossip_debug(GOSSIP_WAIT_DEBUG,
+			     "Interrupted: Removed op %p"
+			     " from htable_ops_in_progress\n",
+			     op);
+	} else {
+		spin_unlock(&op->lock);
+		gossip_err("interrupted operation is in a weird state 0x%x\n",
+			   op->op_state);
+	}
+	reinit_completion(&op->waitq);
+}
+
+/*
+ * Sleeps on waitqueue waiting for matching downcall.
+ * If client-core finishes servicing, then we are good to go.
+ * else if client-core exits, we get woken up here, and retry with a timeout
+ *
+ * When this call returns to the caller, the specified op will no
+ * longer be in either the in_progress hash table or on the request list.
+ *
+ * Returns 0 on success and -errno on failure
+ * Errors are:
+ * EAGAIN in case we want the caller to requeue and try again..
+ * EINTR/EIO/ETIMEDOUT indicating we are done trying to service this
+ * operation since client-core seems to be exiting too often
+ * or if we were interrupted.
+ *
+ * Returns with op->lock taken.
+ */
+static int wait_for_matching_downcall(struct orangefs_kernel_op_s *op,
+		long timeout,
+		int flags)
+			__acquires(op->lock)
+{
+	long n;
+	int writeback = flags & ORANGEFS_OP_WRITEBACK,
+	    interruptible = flags & ORANGEFS_OP_INTERRUPTIBLE;
+
+	/*
+	 * There's a "schedule_timeout" inside of these wait
+	 * primitives, during which the op is out of the hands of the
+	 * user process that needs something done and is being
+	 * manipulated by the client-core process.
+	 */
+	if (writeback)
+		n = wait_for_completion_io_timeout(&op->waitq, timeout);
+	else if (!writeback && interruptible)
+		n = wait_for_completion_interruptible_timeout(&op->waitq,
+								      timeout);
+	else /* !writeback && !interruptible but compiler complains */
+		n = wait_for_completion_killable_timeout(&op->waitq, timeout);
+
+	spin_lock(&op->lock);
+
+	if (op_state_serviced(op))
+		return 0;
+
+	if (unlikely(n < 0)) {
+		gossip_debug(GOSSIP_WAIT_DEBUG,
+			     "%s: operation interrupted, tag %llu, %p\n",
+			     __func__,
+			     llu(op->tag),
+			     op);
+		return -EINTR;
+	}
+	if (op_state_purged(op)) {
+		gossip_debug(GOSSIP_WAIT_DEBUG,
+			     "%s: operation purged, tag %llu, %p, %d\n",
+			     __func__,
+			     llu(op->tag),
+			     op,
+			     op->attempts);
+		return (op->attempts < ORANGEFS_PURGE_RETRY_COUNT) ?
+			 -EAGAIN :
+			 -EIO;
+	}
+	/* must have timed out, then... */
+	gossip_debug(GOSSIP_WAIT_DEBUG,
+		     "%s: operation timed out, tag %llu, %p, %d)\n",
+		     __func__,
+		     llu(op->tag),
+		     op,
+		     op->attempts);
+	return -ETIMEDOUT;
+}

linux-7.2.3/fs/orangefs/xattr.c

@@ -0,0 +1,566 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ * Copyright 2018 Omnibond Systems, L.L.C.
+ *
+ * See COPYING in top-level directory.
+ */
+
+/*
+ *  Linux VFS extended attribute operations.
+ */
+
+#include "protocol.h"
+#include "orangefs-kernel.h"
+#include "orangefs-bufmap.h"
+#include <linux/posix_acl_xattr.h>
+#include <linux/xattr.h>
+#include <linux/hashtable.h>
+
+#define SYSTEM_ORANGEFS_KEY "system.pvfs2."
+#define SYSTEM_ORANGEFS_KEY_LEN 13
+
+/*
+ * this function returns
+ *   0 if the key corresponding to name is not meant to be printed as part
+ *     of a listxattr.
+ *   1 if the key corresponding to name is meant to be returned as part of
+ *     a listxattr.
+ * The ones that start SYSTEM_ORANGEFS_KEY are the ones to avoid printing.
+ */
+static int is_reserved_key(const char *key, size_t size)
+{
+
+	if (size < SYSTEM_ORANGEFS_KEY_LEN)
+		return 1;
+
+	return strncmp(key, SYSTEM_ORANGEFS_KEY, SYSTEM_ORANGEFS_KEY_LEN) ?  1 : 0;
+}
+
+static inline int convert_to_internal_xattr_flags(int setxattr_flags)
+{
+	int internal_flag = 0;
+
+	if (setxattr_flags & XATTR_REPLACE) {
+		/* Attribute must exist! */
+		internal_flag = ORANGEFS_XATTR_REPLACE;
+	} else if (setxattr_flags & XATTR_CREATE) {
+		/* Attribute must not exist */
+		internal_flag = ORANGEFS_XATTR_CREATE;
+	}
+	return internal_flag;
+}
+
+static unsigned int xattr_key(const char *key)
+{
+	unsigned int i = 0;
+	if (!key)
+		return 0;
+	while (*key)
+		i += *key++;
+	return i % 16;
+}
+
+static struct orangefs_cached_xattr *find_cached_xattr(struct inode *inode,
+    const char *key)
+{
+	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
+	struct orangefs_cached_xattr *cx;
+	struct hlist_head *h;
+	struct hlist_node *tmp;
+	h = &orangefs_inode->xattr_cache[xattr_key(key)];
+	if (hlist_empty(h))
+		return NULL;
+	hlist_for_each_entry_safe(cx, tmp, h, node) {
+/*		if (!time_before(jiffies, cx->timeout)) {
+			hlist_del(&cx->node);
+			kfree(cx);
+			continue;
+		}*/
+		if (!strcmp(cx->key, key))
+			return cx;
+	}
+	return NULL;
+}
+
+/*
+ * Tries to get a specified key's attributes of a given
+ * file into a user-specified buffer. Note that the getxattr
+ * interface allows for the users to probe the size of an
+ * extended attribute by passing in a value of 0 to size.
+ * Thus our return value is always the size of the attribute
+ * unless the key does not exist for the file and/or if
+ * there were errors in fetching the attribute value.
+ */
+ssize_t orangefs_inode_getxattr(struct inode *inode, const char *name,
+				void *buffer, size_t size)
+{
+	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
+	struct orangefs_kernel_op_s *new_op = NULL;
+	struct orangefs_cached_xattr *cx;
+	ssize_t ret = -ENOMEM;
+	ssize_t length = 0;
+	int fsuid;
+	int fsgid;
+
+	gossip_debug(GOSSIP_XATTR_DEBUG,
+		     "%s: name %s, buffer_size %zd\n",
+		     __func__, name, size);
+
+	if (S_ISLNK(inode->i_mode))
+		return -EOPNOTSUPP;
+
+	if (strlen(name) >= ORANGEFS_MAX_XATTR_NAMELEN)
+		return -EINVAL;
+
+	fsuid = from_kuid(&init_user_ns, current_fsuid());
+	fsgid = from_kgid(&init_user_ns, current_fsgid());
+
+	gossip_debug(GOSSIP_XATTR_DEBUG,
+		     "getxattr on inode %pU, name %s "
+		     "(uid %o, gid %o)\n",
+		     get_khandle_from_ino(inode),
+		     name,
+		     fsuid,
+		     fsgid);
+
+	down_read(&orangefs_inode->xattr_sem);
+
+	cx = find_cached_xattr(inode, name);
+	if (cx && time_before(jiffies, cx->timeout)) {
+		if (cx->length == -1) {
+			ret = -ENODATA;
+			goto out_unlock;
+		} else {
+			if (size == 0) {
+				ret = cx->length;
+				goto out_unlock;
+			}
+			if (cx->length > size) {
+				ret = -ERANGE;
+				goto out_unlock;
+			}
+			memcpy(buffer, cx->val, cx->length);
+			memset(buffer + cx->length, 0, size - cx->length);
+			ret = cx->length;
+			goto out_unlock;
+		}
+	}
+
+	new_op = op_alloc(ORANGEFS_VFS_OP_GETXATTR);
+	if (!new_op)
+		goto out_unlock;
+
+	new_op->upcall.req.getxattr.refn = orangefs_inode->refn;
+	strscpy(new_op->upcall.req.getxattr.key, name);
+
+	/*
+	 * NOTE: Although keys are meant to be NULL terminated textual
+	 * strings, I am going to explicitly pass the length just in case
+	 * we change this later on...
+	 */
+	new_op->upcall.req.getxattr.key_sz = strlen(name) + 1;
+
+	ret = service_operation(new_op, "orangefs_inode_getxattr",
+				get_interruptible_flag(inode));
+	if (ret != 0) {
+		if (ret == -ENOENT) {
+			ret = -ENODATA;
+			gossip_debug(GOSSIP_XATTR_DEBUG,
+				     "orangefs_inode_getxattr: inode %pU key %s"
+				     " does not exist!\n",
+				     get_khandle_from_ino(inode),
+				     (char *)new_op->upcall.req.getxattr.key);
+			cx = kmalloc_obj(*cx);
+			if (cx) {
+				strscpy(cx->key, name);
+				cx->length = -1;
+				cx->timeout = jiffies +
+				    orangefs_getattr_timeout_msecs*HZ/1000;
+				hlist_add_head( &cx->node,
+                                   &orangefs_inode->xattr_cache[xattr_key(cx->key)]);
+			}
+		}
+		goto out_release_op;
+	}
+
+	/*
+	 * Length returned includes null terminator.
+	 */
+	length = new_op->downcall.resp.getxattr.val_sz;
+	if (length < 0 || length > ORANGEFS_MAX_XATTR_VALUELEN) {
+		ret = -EIO;
+		goto out_release_op;
+	}
+
+	/*
+	 * Just return the length of the queried attribute.
+	 */
+	if (size == 0) {
+		ret = length;
+		goto out_release_op;
+	}
+
+	/*
+	 * Check to see if key length is > provided buffer size.
+	 */
+	if (length > size) {
+		ret = -ERANGE;
+		goto out_release_op;
+	}
+
+	memcpy(buffer, new_op->downcall.resp.getxattr.val, length);
+	memset(buffer + length, 0, size - length);
+	gossip_debug(GOSSIP_XATTR_DEBUG,
+	     "orangefs_inode_getxattr: inode %pU "
+	     "key %s key_sz %d, val_len %d\n",
+	     get_khandle_from_ino(inode),
+	     (char *)new_op->
+		upcall.req.getxattr.key,
+		     (int)new_op->
+		upcall.req.getxattr.key_sz,
+	     (int)ret);
+
+	ret = length;
+
+	if (cx) {
+		strscpy(cx->key, name);
+		memcpy(cx->val, buffer, length);
+		cx->length = length;
+		cx->timeout = jiffies + HZ;
+	} else {
+		cx = kmalloc_obj(*cx);
+		if (cx) {
+			strscpy(cx->key, name);
+			memcpy(cx->val, buffer, length);
+			cx->length = length;
+			cx->timeout = jiffies + HZ;
+			hlist_add_head(&cx->node,
+				&orangefs_inode->xattr_cache[xattr_key(cx->key)]);
+		}
+	}
+
+out_release_op:
+	op_release(new_op);
+out_unlock:
+	up_read(&orangefs_inode->xattr_sem);
+	return ret;
+}
+
+static int orangefs_inode_removexattr(struct inode *inode, const char *name,
+				      int flags)
+{
+	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
+	struct orangefs_kernel_op_s *new_op = NULL;
+	struct orangefs_cached_xattr *cx;
+	struct hlist_head *h;
+	struct hlist_node *tmp;
+	int ret = -ENOMEM;
+
+	if (strlen(name) >= ORANGEFS_MAX_XATTR_NAMELEN)
+		return -EINVAL;
+
+	down_write(&orangefs_inode->xattr_sem);
+	new_op = op_alloc(ORANGEFS_VFS_OP_REMOVEXATTR);
+	if (!new_op)
+		goto out_unlock;
+
+	new_op->upcall.req.removexattr.refn = orangefs_inode->refn;
+	/*
+	 * NOTE: Although keys are meant to be NULL terminated
+	 * textual strings, I am going to explicitly pass the
+	 * length just in case we change this later on...
+	 */
+	strscpy(new_op->upcall.req.removexattr.key, name);
+	new_op->upcall.req.removexattr.key_sz = strlen(name) + 1;
+
+	gossip_debug(GOSSIP_XATTR_DEBUG,
+		     "orangefs_inode_removexattr: key %s, key_sz %d\n",
+		     (char *)new_op->upcall.req.removexattr.key,
+		     (int)new_op->upcall.req.removexattr.key_sz);
+
+	ret = service_operation(new_op,
+				"orangefs_inode_removexattr",
+				get_interruptible_flag(inode));
+	if (ret == -ENOENT) {
+		/*
+		 * Request to replace a non-existent attribute is an error.
+		 */
+		if (flags & XATTR_REPLACE)
+			ret = -ENODATA;
+		else
+			ret = 0;
+	}
+
+	gossip_debug(GOSSIP_XATTR_DEBUG,
+		     "orangefs_inode_removexattr: returning %d\n", ret);
+
+	op_release(new_op);
+
+	h = &orangefs_inode->xattr_cache[xattr_key(name)];
+	hlist_for_each_entry_safe(cx, tmp, h, node) {
+		if (!strcmp(cx->key, name)) {
+			hlist_del(&cx->node);
+			kfree(cx);
+			break;
+		}
+	}
+
+out_unlock:
+	up_write(&orangefs_inode->xattr_sem);
+	return ret;
+}
+
+/*
+ * Tries to set an attribute for a given key on a file.
+ *
+ * Returns a -ve number on error and 0 on success.  Key is text, but value
+ * can be binary!
+ */
+int orangefs_inode_setxattr(struct inode *inode, const char *name,
+			    const void *value, size_t size, int flags)
+{
+	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
+	struct orangefs_kernel_op_s *new_op;
+	int internal_flag = 0;
+	struct orangefs_cached_xattr *cx;
+	struct hlist_head *h;
+	struct hlist_node *tmp;
+	int ret = -ENOMEM;
+
+	gossip_debug(GOSSIP_XATTR_DEBUG,
+		     "%s: name %s, buffer_size %zd\n",
+		     __func__, name, size);
+
+	if (size > ORANGEFS_MAX_XATTR_VALUELEN)
+		return -EINVAL;
+	if (strlen(name) >= ORANGEFS_MAX_XATTR_NAMELEN)
+		return -EINVAL;
+
+	internal_flag = convert_to_internal_xattr_flags(flags);
+
+	/* This is equivalent to a removexattr */
+	if (size == 0 && !value) {
+		gossip_debug(GOSSIP_XATTR_DEBUG,
+			     "removing xattr (%s)\n",
+			     name);
+		return orangefs_inode_removexattr(inode, name, flags);
+	}
+
+	gossip_debug(GOSSIP_XATTR_DEBUG,
+		     "setxattr on inode %pU, name %s\n",
+		     get_khandle_from_ino(inode),
+		     name);
+
+	down_write(&orangefs_inode->xattr_sem);
+	new_op = op_alloc(ORANGEFS_VFS_OP_SETXATTR);
+	if (!new_op)
+		goto out_unlock;
+
+
+	new_op->upcall.req.setxattr.refn = orangefs_inode->refn;
+	new_op->upcall.req.setxattr.flags = internal_flag;
+	/*
+	 * NOTE: Although keys are meant to be NULL terminated textual
+	 * strings, I am going to explicitly pass the length just in
+	 * case we change this later on...
+	 */
+	strscpy(new_op->upcall.req.setxattr.keyval.key, name);
+	new_op->upcall.req.setxattr.keyval.key_sz = strlen(name) + 1;
+	memcpy(new_op->upcall.req.setxattr.keyval.val, value, size);
+	new_op->upcall.req.setxattr.keyval.val_sz = size;
+
+	gossip_debug(GOSSIP_XATTR_DEBUG,
+		     "orangefs_inode_setxattr: key %s, key_sz %d "
+		     " value size %zd\n",
+		     (char *)new_op->upcall.req.setxattr.keyval.key,
+		     (int)new_op->upcall.req.setxattr.keyval.key_sz,
+		     size);
+
+	ret = service_operation(new_op,
+				"orangefs_inode_setxattr",
+				get_interruptible_flag(inode));
+
+	gossip_debug(GOSSIP_XATTR_DEBUG,
+		     "orangefs_inode_setxattr: returning %d\n",
+		     ret);
+
+	/* when request is serviced properly, free req op struct */
+	op_release(new_op);
+
+	h = &orangefs_inode->xattr_cache[xattr_key(name)];
+	hlist_for_each_entry_safe(cx, tmp, h, node) {
+		if (!strcmp(cx->key, name)) {
+			hlist_del(&cx->node);
+			kfree(cx);
+			break;
+		}
+	}
+
+out_unlock:
+	up_write(&orangefs_inode->xattr_sem);
+	return ret;
+}
+
+/*
+ * Tries to get a specified object's keys into a user-specified buffer of a
+ * given size.  Note that like the previous instances of xattr routines, this
+ * also allows you to pass in a NULL pointer and 0 size to probe the size for
+ * subsequent memory allocations. Thus our return value is always the size of
+ * all the keys unless there were errors in fetching the keys!
+ */
+ssize_t orangefs_listxattr(struct dentry *dentry, char *buffer, size_t size)
+{
+	struct inode *inode = dentry->d_inode;
+	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
+	struct orangefs_kernel_op_s *new_op;
+	__u64 token = ORANGEFS_ITERATE_START;
+	ssize_t ret = -ENOMEM;
+	ssize_t total = 0;
+	int count_keys = 0;
+	int key_size;
+	int i = 0;
+	int returned_count = 0;
+
+	if (size > 0 && !buffer) {
+		gossip_err("%s: bogus NULL pointers\n", __func__);
+		return -EINVAL;
+	}
+
+	down_read(&orangefs_inode->xattr_sem);
+	new_op = op_alloc(ORANGEFS_VFS_OP_LISTXATTR);
+	if (!new_op)
+		goto out_unlock;
+
+	if (buffer && size > 0)
+		memset(buffer, 0, size);
+
+try_again:
+	key_size = 0;
+	new_op->upcall.req.listxattr.refn = orangefs_inode->refn;
+	new_op->upcall.req.listxattr.token = token;
+	new_op->upcall.req.listxattr.requested_count =
+	    (size == 0) ? 0 : ORANGEFS_MAX_XATTR_LISTLEN;
+	ret = service_operation(new_op, __func__,
+				get_interruptible_flag(inode));
+	if (ret != 0)
+		goto done;
+
+	if (size == 0) {
+		/*
+		 * This is a bit of a big upper limit, but I did not want to
+		 * spend too much time getting this correct, since users end
+		 * up allocating memory rather than us...
+		 */
+		total = new_op->downcall.resp.listxattr.returned_count *
+			ORANGEFS_MAX_XATTR_NAMELEN;
+		goto done;
+	}
+
+	returned_count = new_op->downcall.resp.listxattr.returned_count;
+	if (returned_count < 0 ||
+	    returned_count > ORANGEFS_MAX_XATTR_LISTLEN) {
+		gossip_err("%s: impossible value for returned_count:%d:\n",
+		__func__,
+		returned_count);
+		ret = -EIO;
+		goto done;
+	}
+
+	/*
+	 * Check to see how much can be fit in the buffer. Fit only whole keys.
+	 */
+	for (i = 0; i < returned_count; i++) {
+		if (new_op->downcall.resp.listxattr.lengths[i] < 0 ||
+		    new_op->downcall.resp.listxattr.lengths[i] >
+		    ORANGEFS_MAX_XATTR_NAMELEN) {
+			gossip_err("%s: impossible value for lengths[%d]\n",
+			    __func__,
+			    new_op->downcall.resp.listxattr.lengths[i]);
+			ret = -EIO;
+			goto done;
+		}
+		if (total + new_op->downcall.resp.listxattr.lengths[i] > size)
+			goto done;
+
+		/*
+		 * Since many dumb programs try to setxattr() on our reserved
+		 * xattrs this is a feeble attempt at defeating those by not
+		 * listing them in the output of listxattr.. sigh
+		 */
+		if (is_reserved_key(new_op->downcall.resp.listxattr.key +
+				    key_size,
+				    new_op->downcall.resp.
+					listxattr.lengths[i])) {
+			gossip_debug(GOSSIP_XATTR_DEBUG, "Copying key %d -> %s\n",
+					i, new_op->downcall.resp.listxattr.key +
+						key_size);
+			memcpy(buffer + total,
+				new_op->downcall.resp.listxattr.key + key_size,
+				new_op->downcall.resp.listxattr.lengths[i]);
+			total += new_op->downcall.resp.listxattr.lengths[i];
+			count_keys++;
+		} else {
+			gossip_debug(GOSSIP_XATTR_DEBUG, "[RESERVED] key %d -> %s\n",
+					i, new_op->downcall.resp.listxattr.key +
+						key_size);
+		}
+		key_size += new_op->downcall.resp.listxattr.lengths[i];
+	}
+
+	/*
+	 * Since the buffer was large enough, we might have to continue
+	 * fetching more keys!
+	 */
+	token = new_op->downcall.resp.listxattr.token;
+	if (token != ORANGEFS_ITERATE_END)
+		goto try_again;
+
+done:
+	gossip_debug(GOSSIP_XATTR_DEBUG, "%s: returning %d"
+		     " [size of buffer %ld] (filled in %d keys)\n",
+		     __func__,
+		     ret ? (int)ret : (int)total,
+		     (long)size,
+		     count_keys);
+	op_release(new_op);
+	if (ret == 0)
+		ret = total;
+out_unlock:
+	up_read(&orangefs_inode->xattr_sem);
+	return ret;
+}
+
+static int orangefs_xattr_set_default(const struct xattr_handler *handler,
+				      struct mnt_idmap *idmap,
+				      struct dentry *unused,
+				      struct inode *inode,
+				      const char *name,
+				      const void *buffer,
+				      size_t size,
+				      int flags)
+{
+	return orangefs_inode_setxattr(inode, name, buffer, size, flags);
+}
+
+static int orangefs_xattr_get_default(const struct xattr_handler *handler,
+				      struct dentry *unused,
+				      struct inode *inode,
+				      const char *name,
+				      void *buffer,
+				      size_t size)
+{
+	return orangefs_inode_getxattr(inode, name, buffer, size);
+
+}
+
+static const struct xattr_handler orangefs_xattr_default_handler = {
+	.prefix = "",  /* match any name => handlers called with full name */
+	.get = orangefs_xattr_get_default,
+	.set = orangefs_xattr_set_default,
+};
+
+const struct xattr_handler * const orangefs_xattr_handlers[] = {
+	&orangefs_xattr_default_handler,
+	NULL
+};