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xfs: create a predicate to determine if two xfs_names are the same

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Create a simple predicate to determine if two xfs_names are the same
objects or have the exact same name.  The comparison is always case
sensitive.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Darrick J. Wong 2024-02-22 12:30:49 -08:00
parent e99bfc9e68
commit d9c0775897
2 changed files with 14 additions and 2 deletions
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12
fs/xfs/libxfs/xfs_dir2.h
View File

@ -24,6 +24,18 @@ struct xfs_dir3_icleaf_hdr;
extern const struct xfs_name xfs_name_dotdot;
extern const struct xfs_name xfs_name_dot;
static inline bool
xfs_dir2_samename(
const struct xfs_name *n1,
const struct xfs_name *n2)
{
if (n1 == n2)
return true;
if (n1->len != n2->len)
return false;
return !memcmp(n1->name, n2->name, n1->len);
}
/*
* Convert inode mode to directory entry filetype
*/

4
fs/xfs/scrub/dir.c
View File

@ -93,11 +93,11 @@ xchk_dir_actor(
return -ECANCELED;
}
if (!strncmp(".", name->name, name->len)) {
if (xfs_dir2_samename(name, &xfs_name_dot)) {
/* If this is "." then check that the inum matches the dir. */
if (ino != dp->i_ino)
xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);
} else if (!strncmp("..", name->name, name->len)) {
} else if (xfs_dir2_samename(name, &xfs_name_dotdot)) {
/*
* If this is ".." in the root inode, check that the inum
* matches this dir.