From patchwork Wed Dec 27 13:54:35 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Darrick J. Wong" X-Patchwork-Id: 13508511 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id F2D441871; Mon, 1 Jan 2024 00:54:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="U6zl2LFJ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 63415C433C8; Mon, 1 Jan 2024 00:54:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1704070476; bh=9jAnSOIqQu29C0AAMA66mRn2pUBSA6wv6/vXucWwKZE=; h=Date:Subject:From:To:Cc:In-Reply-To:References:From; b=U6zl2LFJDg9Cr3CmRI7EmtpwegaRJ6EOMNACJ3TvWR5WoISoIOtpf71+VEhqq49zu zY+ktYvq7fsQGNN/CK/grRaGmErQxstEbWD++Xg3y4NAarPX7lLdK96K9hu8bPRroG 3KgLnY/CJw/sXUStFbFr5OHYBV3QsZI1mExG9PMGxkUvKU1ozrE4cvm82dxic5WC7O j/kBsvbAoucuwKp27O2f+2vWNGzBVoWmTp1CtUHIF3B2YF51yK5ev046+nWrfPbgAI Gg/bhpKci9wHi6yFFfFy/GqSeoHUNw9M/yMW4iyclk3CsxtDzKDRdzn17wXbTNCadc u0euGEfUZg0mA== Date: Sun, 31 Dec 2023 16:54:35 +9900 Subject: [PATCH 07/17] punch-alternating: detect xfs realtime files with large allocation units From: "Darrick J. Wong" To: djwong@kernel.org, zlang@redhat.com Cc: guan@eryu.me, linux-xfs@vger.kernel.org, fstests@vger.kernel.org Message-ID: <170405030429.1826350.15575708588863398953.stgit@frogsfrogsfrogs> In-Reply-To: <170405030327.1826350.709349465573559319.stgit@frogsfrogsfrogs> References: <170405030327.1826350.709349465573559319.stgit@frogsfrogsfrogs> User-Agent: StGit/0.19 Precedence: bulk X-Mailing-List: fstests@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Darrick J. Wong 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 --- src/punch-alternating.c | 28 +++++++++++++++++++++++++++- tests/xfs/114 | 4 ++++ tests/xfs/146 | 2 +- tests/xfs/187 | 3 ++- tests/xfs/341 | 4 ++-- 5 files changed, 36 insertions(+), 5 deletions(-) diff --git a/src/punch-alternating.c b/src/punch-alternating.c index 18dd215197..d2bb4b6a22 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 0e8a0529ab..7ecb4d217c 100755 --- a/tests/xfs/114 +++ b/tests/xfs/114 @@ -49,6 +49,10 @@ $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 5090435976..5d30cd8123 100755 --- a/tests/xfs/146 +++ b/tests/xfs/146 @@ -69,7 +69,7 @@ _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 7c34d8e630..14c3b37670 100755 --- a/tests/xfs/187 +++ b/tests/xfs/187 @@ -132,7 +132,8 @@ $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_IO_PROG -c 'statfs' $SCRATCH_MNT | grep statfs.f_bavail | awk '{print $3}') diff --git a/tests/xfs/341 b/tests/xfs/341 index 1f734c9015..7d2842b579 100755 --- a/tests/xfs/341 +++ b/tests/xfs/341 @@ -43,8 +43,8 @@ len=$((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