47 lines
1.4 KiB
Bash
47 lines
1.4 KiB
Bash
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#!/bin/bash
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#
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# Test if "mkfs.btrfs --rootdir" would handle a rootdir with subdirectories
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# on another fs.
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source "$TEST_TOP/common" || exit
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setup_root_helper
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# Here we need 3 devices, one for the rootdir, one for a subdirectory of
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# rootdir. This is to ensure we have conflicting inode numbers among the
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# two filesystems.
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# The last device is the for the mkfs.
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setup_loopdevs 3
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prepare_loopdevs
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dev1=${loopdevs[1]}
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dev2=${loopdevs[2]}
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dev3=${loopdevs[3]}
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tmpdir=$(_mktemp_dir mkfs-rootdir-cross-mount)
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run_check $SUDO_HELPER "$TOP/mkfs.btrfs" -f "$dev1"
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run_check $SUDO_HELPER "$TOP/mkfs.btrfs" -f "$dev2"
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# Populate both filesystems with the same contents. So that we're ensured
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# to have conflicting inode numbers.
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for i in "$dev1" "$dev2"; do
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run_check $SUDO_HELPER mount -t btrfs "$i" "$tmpdir"
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run_check mkdir "$tmpdir/dir1" "$tmpdir/dir2"
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run_check touch "$tmpdir/file1" "$tmpdir/file2"
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run_check $SUDO_HELPER umount "$tmpdir"
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done
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run_check $SUDO_HELPER mount -t btrfs "$dev1" "$tmpdir"
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run_check $SUDO_HELPER mount -t btrfs "$dev2" "$tmpdir/dir1"
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# The old rootdir implementation relies on the st_ino from the host fs, but
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# doesn't do any cross-mount checks, it would result conflicting inode numbers
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# and fail.
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run_check "$TOP/mkfs.btrfs" --rootdir "$tmpdir" -f "$dev3"
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run_check $SUDO_HELPER umount "$tmpdir/dir1"
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run_check $SUDO_HELPER umount "$tmpdir"
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run_check "$TOP/btrfs" check "$dev3"
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rm -rf -- "$tmpdir"
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cleanup_loopdevs
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