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Linux does not HAVE_DNLC

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Since Linux does not have the Directory Name Lookup Cache, we don't need
the code to manage it.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Tim Chase <tim@chase2k.com>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Reviewed-by: Richard Elling <Richard.Elling@RichardElling.com>
Signed-off-by: Matthew Ahrens <mahrens@delphix.com>
Closes #8031
This commit is contained in:
Matthew Ahrens 2018-10-17 10:30:08 -07:00 committed by Brian Behlendorf
parent bfcb82cb54
commit 5fbf85c4e2
3 changed files with 1 additions and 66 deletions
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2
Makefile.am
View File

@ -117,7 +117,7 @@ cppcheck:
cppcheck --quiet --force --error-exitcode=2 --inline-suppr \
--suppressions-list=.github/suppressions.txt \
-UHAVE_SSE2 -UHAVE_AVX512F -UHAVE_UIO_ZEROCOPY \
-UHAVE_DNLC ${top_srcdir}; \
${top_srcdir}; \
else \
echo "skipping cppcheck because cppcheck is not installed"; \
fi

37
module/zfs/zfs_dir.c
View File

@ -99,11 +99,6 @@ zfs_match_find(zfsvfs_t *zfsvfs, znode_t *dzp, char *name, matchtype_t mt,
*zoid = ZFS_DIRENT_OBJ(*zoid);
#ifdef HAVE_DNLC
if (error == ENOENT && update)
dnlc_update(ZTOI(dzp), name, DNLC_NO_VNODE);
#endif /* HAVE_DNLC */
return (error);
}
@ -151,9 +146,6 @@ zfs_dirent_lock(zfs_dirlock_t **dlpp, znode_t *dzp, char *name, znode_t **zpp,
boolean_t update;
matchtype_t mt = 0;
uint64_t zoid;
#ifdef HAVE_DNLC
vnode_t *vp = NULL;
#endif /* HAVE_DNLC */
int error = 0;
int cmpflags;
@ -320,30 +312,9 @@ zfs_dirent_lock(zfs_dirlock_t **dlpp, znode_t *dzp, char *name, znode_t **zpp,
if (error == 0)
error = (zoid == 0 ? SET_ERROR(ENOENT) : 0);
} else {
#ifdef HAVE_DNLC
if (update)
vp = dnlc_lookup(ZTOI(dzp), name);
if (vp == DNLC_NO_VNODE) {
iput(vp);
error = SET_ERROR(ENOENT);
} else if (vp) {
if (flag & ZNEW) {
zfs_dirent_unlock(dl);
iput(vp);
return (SET_ERROR(EEXIST));
}
*dlpp = dl;
*zpp = VTOZ(vp);
return (0);
} else {
error = zfs_match_find(zfsvfs, dzp, name, mt,
update, direntflags, realpnp, &zoid);
}
#else
error = zfs_match_find(zfsvfs, dzp, name, mt,
update, direntflags, realpnp, &zoid);
#endif /* HAVE_DNLC */
}
if (error) {
if (error != ENOENT || (flag & ZEXISTS)) {
zfs_dirent_unlock(dl);
@ -359,10 +330,6 @@ zfs_dirent_lock(zfs_dirlock_t **dlpp, znode_t *dzp, char *name, znode_t **zpp,
zfs_dirent_unlock(dl);
return (error);
}
#ifdef HAVE_DNLC
if (!(flag & ZXATTR) && update)
dnlc_update(ZTOI(dzp), name, ZTOI(*zpp));
#endif /* HAVE_DNLC */
}
*dlpp = dl;
@ -901,10 +868,6 @@ zfs_link_destroy(zfs_dirlock_t *dl, znode_t *zp, dmu_tx_t *tx, int flag,
int count = 0;
int error;
#ifdef HAVE_DNLC
dnlc_remove(ZTOI(dzp), dl->dl_name);
#endif /* HAVE_DNLC */
if (!(flag & ZRENAMING)) {
mutex_enter(&zp->z_lock);

28
module/zfs/zfs_vnops.c
View File

@ -1208,27 +1208,6 @@ zfs_lookup(struct inode *dip, char *nm, struct inode **ipp, int flags,
return (0);
}
return (error);
#ifdef HAVE_DNLC
} else if (!zdp->z_zfsvfs->z_norm &&
(zdp->z_zfsvfs->z_case == ZFS_CASE_SENSITIVE)) {
vnode_t *tvp = dnlc_lookup(dvp, nm);
if (tvp) {
error = zfs_fastaccesschk_execute(zdp, cr);
if (error) {
iput(tvp);
return (error);
}
if (tvp == DNLC_NO_VNODE) {
iput(tvp);
return (SET_ERROR(ENOENT));
} else {
*vpp = tvp;
return (specvp_check(vpp, cr));
}
}
#endif /* HAVE_DNLC */
}
}
@ -1765,13 +1744,6 @@ top:
goto out;
}
#ifdef HAVE_DNLC
if (realnmp)
dnlc_remove(dvp, realnmp->pn_buf);
else
dnlc_remove(dvp, name);
#endif /* HAVE_DNLC */
mutex_enter(&zp->z_lock);
may_delete_now = atomic_read(&ip->i_count) == 1 && !(zp->z_is_mapped);
mutex_exit(&zp->z_lock);