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xfs: devirtualize ->m_dirnameops

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Instead of causing a relatively expensive indirect call for each
hashing and comparism of a file name in a directory just use an
inline function and a simple branch on the ASCII CI bit.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
[darrick: fix unused variable warning]
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
This commit is contained in:
Christoph Hellwig 2019-11-11 12:59:26 -08:00 • committed by Darrick J. Wong
parent 537dabcfdb
commit d8d11fc703
10 changed files with 42 additions and 58 deletions
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24
fs/xfs/libxfs/xfs_dir2_priv.h
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@ -40,6 +40,9 @@ struct xfs_dir3_icfree_hdr {
};
/* xfs_dir2.c */
xfs_dahash_t xfs_ascii_ci_hashname(struct xfs_name *name);
enum xfs_dacmp xfs_ascii_ci_compname(struct xfs_da_args *args,
const unsigned char *name, int len);
extern int xfs_dir2_grow_inode(struct xfs_da_args *args, int space,
xfs_dir2_db_t *dbp);
extern int xfs_dir_cilookup_result(struct xfs_da_args *args,
@ -191,4 +194,25 @@ xfs_dir2_data_entsize(
return round_up(len, XFS_DIR2_DATA_ALIGN);
}
static inline xfs_dahash_t
xfs_dir2_hashname(
struct xfs_mount *mp,
struct xfs_name *name)
{
if (unlikely(xfs_sb_version_hasasciici(&mp->m_sb)))
return xfs_ascii_ci_hashname(name);
return xfs_da_hashname(name->name, name->len);
}
static inline enum xfs_dacmp
xfs_dir2_compname(
struct xfs_da_args *args,
const unsigned char *name,
int len)
{
if (unlikely(xfs_sb_version_hasasciici(&args->dp->i_mount->m_sb)))
return xfs_ascii_ci_compname(args, name, len);
return xfs_da_compname(args, name, len);
}
#endif /* __XFS_DIR2_PRIV_H__ */