From: Darrick J. Wong Date: Thu, 20 Feb 2025 21:47:06 +0000 (-0800) Subject: punch-alternating: detect xfs realtime files with large allocation units X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=2de9a36140e619db222aa5400bb061d013b19f29;p=users%2Fhch%2Fxfstests-dev.git punch-alternating: detect xfs realtime files with large allocation units For files on the XFS realtime volume, it's possible that the file allocation unit (aka the minimum size we have to punch to deallocate file blocks) could be greater than a single fs block. This utility assumed that it's always possible to punch a single fs block, but for these types of files, all that does is zeroes the page cache. While that's what most *user applications* want, fstests uses punching to fragment file mapping metadata and/or fragment free space, so adapt this test for that purpose by detecting realtime files. Signed-off-by: "Darrick J. Wong" Reviewed-by: Christoph Hellwig Signed-off-by: Zorro Lang --- diff --git a/src/punch-alternating.c b/src/punch-alternating.c index 18dd21519..d2bb4b6a2 100644 --- a/src/punch-alternating.c +++ b/src/punch-alternating.c @@ -20,6 +20,28 @@ void usage(char *cmd) exit(1); } +/* Compute the file allocation unit size for an XFS file. */ +static int detect_xfs_alloc_unit(int fd) +{ + struct fsxattr fsx; + struct xfs_fsop_geom fsgeom; + int ret; + + ret = ioctl(fd, XFS_IOC_FSGEOMETRY, &fsgeom); + if (ret) + return -1; + + ret = ioctl(fd, XFS_IOC_FSGETXATTR, &fsx); + if (ret) + return -1; + + ret = fsgeom.blocksize; + if (fsx.fsx_xflags & XFS_XFLAG_REALTIME) + ret *= fsgeom.rtextsize; + + return ret; +} + int main(int argc, char *argv[]) { struct stat s; @@ -82,7 +104,11 @@ int main(int argc, char *argv[]) goto err; sz = s.st_size; - blksz = sf.f_bsize; + c = detect_xfs_alloc_unit(fd); + if (c > 0) + blksz = c; + else + blksz = sf.f_bsize; mode = FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE; for (offset = start_offset * blksz; diff --git a/tests/xfs/114 b/tests/xfs/114 index 510d31a40..f764cad73 100755 --- a/tests/xfs/114 +++ b/tests/xfs/114 @@ -47,6 +47,10 @@ $XFS_IO_PROG -f \ -c "pwrite -S 0x68 -b 1048576 0 $len2" \ $SCRATCH_MNT/f2 >> $seqres.full +# The arguments to punch-alternating must be specified in units of file +# allocation units, so we divide the argument by $file_blksz. We already +# verified that $blksz is congruent with $file_blksz, so the fpunch parameters +# will always align with the file allocation unit. $here/src/punch-alternating -o $((16 * blksz / file_blksz)) \ -s $((blksz / file_blksz)) \ -i $((blksz * 2 / file_blksz)) \ diff --git a/tests/xfs/146 b/tests/xfs/146 index b6f4c2bd0..1cd7076d2 100755 --- a/tests/xfs/146 +++ b/tests/xfs/146 @@ -67,7 +67,7 @@ _xfs_force_bdev realtime $SCRATCH_MNT # Allocate some stuff at the start, to force the first falloc of the ouch file # to happen somewhere in the middle of the rt volume $XFS_IO_PROG -f -c 'falloc 0 64m' "$SCRATCH_MNT/b" -$here/src/punch-alternating -i $((rextblks * 2)) -s $((rextblks)) "$SCRATCH_MNT/b" +$here/src/punch-alternating "$SCRATCH_MNT/b" avail="$(df -P "$SCRATCH_MNT" | awk 'END {print $4}')"1 toobig="$((avail * 2))" diff --git a/tests/xfs/187 b/tests/xfs/187 index 56a9adc16..1d32d702f 100755 --- a/tests/xfs/187 +++ b/tests/xfs/187 @@ -130,7 +130,8 @@ $XFS_IO_PROG -f -c "truncate $required_sz" -c "falloc 0 $remap_sz" $SCRATCH_MNT/ # Punch out every other extent of the last two sections, to fragment free space. frag_sz=$((remap_sz * 3)) punch_off=$((bigfile_sz - frag_sz)) -$here/src/punch-alternating $SCRATCH_MNT/bigfile -o $((punch_off / fsbsize)) -i $((rtextsize_blks * 2)) -s $rtextsize_blks +rtextsize_bytes=$((fsbsize * rtextsize_blks)) +$here/src/punch-alternating $SCRATCH_MNT/bigfile -o $((punch_off / rtextsize_bytes)) # Make sure we have some free rtextents. free_rtx=$(_xfs_statfs_field "$SCRATCH_MNT" statfs.f_bavail) diff --git a/tests/xfs/341 b/tests/xfs/341 index 6e25549b2..9b12febf8 100755 --- a/tests/xfs/341 +++ b/tests/xfs/341 @@ -41,8 +41,8 @@ len=$((blocks * rtextsz)) echo "Create some files" $XFS_IO_PROG -f -R -c "falloc 0 $len" -c "pwrite -S 0x68 -b 1048576 0 $len" $SCRATCH_MNT/f1 >> $seqres.full $XFS_IO_PROG -f -R -c "falloc 0 $len" -c "pwrite -S 0x68 -b 1048576 0 $len" $SCRATCH_MNT/f2 >> $seqres.full -$here/src/punch-alternating -i $((2 * rtextsz_blks)) -s $rtextsz_blks $SCRATCH_MNT/f1 >> "$seqres.full" -$here/src/punch-alternating -i $((2 * rtextsz_blks)) -s $rtextsz_blks $SCRATCH_MNT/f2 >> "$seqres.full" +$here/src/punch-alternating $SCRATCH_MNT/f1 >> "$seqres.full" +$here/src/punch-alternating $SCRATCH_MNT/f2 >> "$seqres.full" echo garbage > $SCRATCH_MNT/f3 ino=$(stat -c '%i' $SCRATCH_MNT/f3) _scratch_unmount