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xfs: fix sb_spino_align checks for large fsblock sizes

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For a sparse inodes filesystem, mkfs.xfs computes the values of
sb_spino_align and sb_inoalignmt with the following code:

	int     cluster_size = XFS_INODE_BIG_CLUSTER_SIZE;

	if (cfg->sb_feat.crcs_enabled)
		cluster_size *= cfg->inodesize / XFS_DINODE_MIN_SIZE;

	sbp->sb_spino_align = cluster_size >> cfg->blocklog;
	sbp->sb_inoalignmt = XFS_INODES_PER_CHUNK *
			cfg->inodesize >> cfg->blocklog;

On a V5 filesystem with 64k fsblocks and 512 byte inodes, this results
in cluster_size = 8192 * (512 / 256) = 16384.  As a result,
sb_spino_align and sb_inoalignmt are both set to zero.  Unfortunately,
this trips the new sb_spino_align check that was just added to
xfs_validate_sb_common, and the mkfs fails:

# mkfs.xfs -f -b size=64k, /dev/sda
meta-data=/dev/sda               isize=512    agcount=4, agsize=81136 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=1, sparse=1, rmapbt=1
         =                       reflink=1    bigtime=1 inobtcount=1 nrext64=1
         =                       exchange=0   metadir=0
data     =                       bsize=65536  blocks=324544, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=65536  ascii-ci=0, ftype=1, parent=0
log      =internal log           bsize=65536  blocks=5006, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=65536  blocks=0, rtextents=0
         =                       rgcount=0    rgsize=0 extents
Discarding blocks...Sparse inode alignment (0) is invalid.
Metadata corruption detected at 0x560ac5a80bbe, xfs_sb block 0x0/0x200
libxfs_bwrite: write verifier failed on xfs_sb bno 0x0/0x1
mkfs.xfs: Releasing dirty buffer to free list!
found dirty buffer (bulk) on free list!
Sparse inode alignment (0) is invalid.
Metadata corruption detected at 0x560ac5a80bbe, xfs_sb block 0x0/0x200
libxfs_bwrite: write verifier failed on xfs_sb bno 0x0/0x1
mkfs.xfs: writing AG headers failed, err=22

Prior to commit 59e43f5479 this all worked fine, even if "sparse"
inodes are somewhat meaningless when everything fits in a single
fsblock.  Adjust the checks to handle existing filesystems.

Cc: <stable@vger.kernel.org> # v6.13-rc1
Fixes: 59e43f5479 ("xfs: sb_spino_align is not verified")
Signed-off-by: "Darrick J. Wong" <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Darrick J. Wong
2024-12-02 10:57:39 -08:00
parent ca378189fd
commit 7f8a44f372
1 changed files with 6 additions and 5 deletions
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11
fs/xfs/libxfs/xfs_sb.c
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@@ -494,12 +494,13 @@ xfs_validate_sb_common(
return -EINVAL;
}
if (!sbp->sb_spino_align ||
sbp->sb_spino_align > sbp->sb_inoalignmt ||
(sbp->sb_inoalignmt % sbp->sb_spino_align) != 0) {
if (sbp->sb_spino_align &&
(sbp->sb_spino_align > sbp->sb_inoalignmt ||
(sbp->sb_inoalignmt % sbp->sb_spino_align) != 0)) {
xfs_warn(mp,
"Sparse inode alignment (%u) is invalid.",
sbp->sb_spino_align);
"Sparse inode alignment (%u) is invalid, must be integer factor of (%u).",
sbp->sb_spino_align,
sbp->sb_inoalignmt);
return -EINVAL;
}
} else if (sbp->sb_spino_align) {