zfs: light refactor to indicate cachedlookup in zfs_lookup
If we come from VOP_CACHEDLOOKUP, we must skip the VEXEC check as it will have been done in the caller (vfs_cache_lookup). This is a part of D23247, which may skip the earlier VEXEC check as well if the root fd was opened with O_SEARCH. This one required slightly more work as zfs_lookup may also be called indirectly as VOP_LOOKUP or a couple of other places where we must do the check.
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@ -1470,7 +1470,7 @@ zfs_lookup_lock(vnode_t *dvp, vnode_t *vp, const char *name, int lkflags)
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/* ARGSUSED */
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static int
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zfs_lookup(vnode_t *dvp, char *nm, vnode_t **vpp, struct componentname *cnp,
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int nameiop, cred_t *cr, kthread_t *td, int flags)
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int nameiop, cred_t *cr, kthread_t *td, int flags, boolean_t cached)
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{
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znode_t *zdp = VTOZ(dvp);
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znode_t *zp;
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@ -1542,10 +1542,13 @@ zfs_lookup(vnode_t *dvp, char *nm, vnode_t **vpp, struct componentname *cnp,
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/*
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* Check accessibility of directory.
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*/
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if (error = zfs_zaccess(zdp, ACE_EXECUTE, 0, B_FALSE, cr)) {
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if (!cached) {
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error = zfs_zaccess(zdp, ACE_EXECUTE, 0, B_FALSE, cr);
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if (error != 0) {
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ZFS_EXIT(zfsvfs);
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return (error);
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}
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}
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if (zfsvfs->z_utf8 && u8_validate(nm, strlen(nm),
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NULL, U8_VALIDATE_ENTIRE, &error) < 0) {
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@ -4894,12 +4897,7 @@ zfs_freebsd_access(ap)
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}
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static int
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zfs_freebsd_lookup(ap)
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struct vop_lookup_args /* {
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struct vnode *a_dvp;
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struct vnode **a_vpp;
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struct componentname *a_cnp;
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} */ *ap;
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zfs_freebsd_lookup(struct vop_lookup_args *ap, boolean_t cached)
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{
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struct componentname *cnp = ap->a_cnp;
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char nm[NAME_MAX + 1];
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@ -4908,7 +4906,14 @@ zfs_freebsd_lookup(ap)
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strlcpy(nm, cnp->cn_nameptr, MIN(cnp->cn_namelen + 1, sizeof(nm)));
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return (zfs_lookup(ap->a_dvp, nm, ap->a_vpp, cnp, cnp->cn_nameiop,
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cnp->cn_cred, cnp->cn_thread, 0));
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cnp->cn_cred, cnp->cn_thread, 0, cached));
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}
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static int
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zfs_freebsd_cachedlookup(struct vop_cachedlookup_args *ap)
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{
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return (zfs_freebsd_lookup((struct vop_lookup_args *)ap, B_TRUE));
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}
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static int
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@ -4925,7 +4930,7 @@ zfs_cache_lookup(ap)
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if (zfsvfs->z_use_namecache)
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return (vfs_cache_lookup(ap));
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else
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return (zfs_freebsd_lookup(ap));
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return (zfs_freebsd_lookup(ap, B_FALSE));
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}
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static int
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@ -5507,7 +5512,7 @@ vop_getextattr {
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ZFS_ENTER(zfsvfs);
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error = zfs_lookup(ap->a_vp, NULL, &xvp, NULL, 0, ap->a_cred, td,
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LOOKUP_XATTR);
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LOOKUP_XATTR, B_FALSE);
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if (error != 0) {
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ZFS_EXIT(zfsvfs);
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return (error);
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@ -5576,7 +5581,7 @@ vop_deleteextattr {
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ZFS_ENTER(zfsvfs);
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error = zfs_lookup(ap->a_vp, NULL, &xvp, NULL, 0, ap->a_cred, td,
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LOOKUP_XATTR);
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LOOKUP_XATTR, B_FALSE);
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if (error != 0) {
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ZFS_EXIT(zfsvfs);
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return (error);
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@ -5644,7 +5649,7 @@ vop_setextattr {
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ZFS_ENTER(zfsvfs);
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error = zfs_lookup(ap->a_vp, NULL, &xvp, NULL, 0, ap->a_cred, td,
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LOOKUP_XATTR | CREATE_XATTR_DIR);
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LOOKUP_XATTR | CREATE_XATTR_DIR, B_FALSE);
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if (error != 0) {
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ZFS_EXIT(zfsvfs);
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return (error);
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@ -5721,7 +5726,7 @@ vop_listextattr {
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*sizep = 0;
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error = zfs_lookup(ap->a_vp, NULL, &xvp, NULL, 0, ap->a_cred, td,
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LOOKUP_XATTR);
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LOOKUP_XATTR, B_FALSE);
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if (error != 0) {
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ZFS_EXIT(zfsvfs);
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/*
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@ -5982,7 +5987,7 @@ struct vop_vector zfs_vnodeops = {
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.vop_access = zfs_freebsd_access,
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.vop_allocate = VOP_EINVAL,
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.vop_lookup = zfs_cache_lookup,
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.vop_cachedlookup = zfs_freebsd_lookup,
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.vop_cachedlookup = zfs_freebsd_cachedlookup,
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.vop_getattr = zfs_freebsd_getattr,
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.vop_setattr = zfs_freebsd_setattr,
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.vop_create = zfs_freebsd_create,
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