70 lines
1.7 KiB
Bash
Executable File
70 lines
1.7 KiB
Bash
Executable File
#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Test: shmem_zc with fio verify over filesystem on loop target
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#
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# mkfs + mount ext4 on the ublk device, then run fio verify on a
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# file inside that filesystem. Exercises the full stack:
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# filesystem -> block layer -> ublk shmem_zc -> loop target backing file.
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. "$(cd "$(dirname "$0")" && pwd)"/test_common.sh
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ERR_CODE=0
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_prep_test "shmem_zc" "loop target hugetlbfs shmem zero-copy fs verify test"
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if ! _have_program fio; then
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echo "SKIP: fio not available"
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exit "$UBLK_SKIP_CODE"
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fi
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if ! grep -q hugetlbfs /proc/filesystems; then
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echo "SKIP: hugetlbfs not supported"
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exit "$UBLK_SKIP_CODE"
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fi
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# Allocate hugepages
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OLD_NR_HP=$(cat /proc/sys/vm/nr_hugepages)
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echo 10 > /proc/sys/vm/nr_hugepages
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NR_HP=$(cat /proc/sys/vm/nr_hugepages)
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if [ "$NR_HP" -lt 2 ]; then
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echo "SKIP: cannot allocate hugepages"
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echo "$OLD_NR_HP" > /proc/sys/vm/nr_hugepages
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exit "$UBLK_SKIP_CODE"
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fi
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# Mount hugetlbfs
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HTLB_MNT=$(mktemp -d "${UBLK_TEST_DIR}/htlb_mnt_XXXXXX")
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if ! mount -t hugetlbfs none "$HTLB_MNT"; then
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echo "SKIP: cannot mount hugetlbfs"
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rmdir "$HTLB_MNT"
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echo "$OLD_NR_HP" > /proc/sys/vm/nr_hugepages
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exit "$UBLK_SKIP_CODE"
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fi
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HTLB_FILE="$HTLB_MNT/ublk_buf"
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fallocate -l 4M "$HTLB_FILE"
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_create_backfile 0 256M
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BACKFILE="${UBLK_BACKFILES[0]}"
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dev_id=$(_add_ublk_dev -t loop --shmem_zc --htlb "$HTLB_FILE" "$BACKFILE")
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_check_add_dev $TID $?
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_mkfs_mount_test /dev/ublkb"${dev_id}" \
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_run_fio_verify_io --filename=testfile \
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--size=128M \
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--mem=mmaphuge:"$HTLB_FILE"
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ERR_CODE=$?
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# Delete device first so daemon releases the htlb mmap
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_ublk_del_dev "${dev_id}"
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rm -f "$HTLB_FILE"
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umount "$HTLB_MNT"
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rmdir "$HTLB_MNT"
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echo "$OLD_NR_HP" > /proc/sys/vm/nr_hugepages
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_cleanup_test
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_show_result $TID $ERR_CODE
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