static void
zfs_znode_move_impl(znode_t *ozp, znode_t *nzp)
{
vnode_t *vp;
/* Copy fields. */
nzp->z_zfsvfs = ozp->z_zfsvfs;
/* Swap vnodes. */
vp = nzp->z_vnode;
nzp->z_vnode = ozp->z_vnode;
ozp->z_vnode = vp; /* let destructor free the overwritten vnode */
ZTOV(ozp)->v_data = ozp;
ZTOV(nzp)->v_data = nzp;
nzp->z_id = ozp->z_id;
ASSERT(ozp->z_dirlocks == NULL); /* znode not in use */
ASSERT(avl_numnodes(&ozp->z_range_avl) == 0);
nzp->z_unlinked = ozp->z_unlinked;
nzp->z_atime_dirty = ozp->z_atime_dirty;
nzp->z_zn_prefetch = ozp->z_zn_prefetch;
nzp->z_blksz = ozp->z_blksz;
nzp->z_seq = ozp->z_seq;
nzp->z_mapcnt = ozp->z_mapcnt;
nzp->z_last_itx = ozp->z_last_itx;
nzp->z_gen = ozp->z_gen;
nzp->z_sync_cnt = ozp->z_sync_cnt;
nzp->z_phys = ozp->z_phys;
nzp->z_dbuf = ozp->z_dbuf;
/*
* Since this is just an idle znode and kmem is already dealing with
* memory pressure, release any cached ACL.
*/
if (ozp->z_acl_cached) {
zfs_acl_free(ozp->z_acl_cached);
ozp->z_acl_cached = NULL;
}
/* Update back pointers. */
(void) dmu_buf_update_user(nzp->z_dbuf, ozp, nzp, &nzp->z_phys,
znode_evict_error);
/*
* Invalidate the original znode by clearing fields that provide a
* pointer back to the znode. Set the low bit of the vfs pointer to
* ensure that zfs_znode_move() recognizes the znode as invalid in any
* subsequent callback.
*/
ozp->z_dbuf = NULL;
POINTER_INVALIDATE(&ozp->z_zfsvfs);
}
int
zfs_create_share_dir(zfs_sb_t *zsb, dmu_tx_t *tx)
{
#ifdef HAVE_SMB_SHARE
zfs_acl_ids_t acl_ids;
vattr_t vattr;
znode_t *sharezp;
vnode_t *vp;
znode_t *zp;
int error;
vattr.va_mask = AT_MODE|AT_UID|AT_GID|AT_TYPE;
vattr.va_mode = S_IFDIR | 0555;
vattr.va_uid = crgetuid(kcred);
vattr.va_gid = crgetgid(kcred);
sharezp = kmem_cache_alloc(znode_cache, KM_SLEEP);
sharezp->z_moved = 0;
sharezp->z_unlinked = 0;
sharezp->z_atime_dirty = 0;
sharezp->z_zfsvfs = zfsvfs;
sharezp->z_is_sa = zfsvfs->z_use_sa;
vp = ZTOV(sharezp);
vn_reinit(vp);
vp->v_type = VDIR;
VERIFY(0 == zfs_acl_ids_create(sharezp, IS_ROOT_NODE, &vattr,
kcred, NULL, &acl_ids));
zfs_mknode(sharezp, &vattr, tx, kcred, IS_ROOT_NODE, &zp, &acl_ids);
ASSERT3P(zp, ==, sharezp);
ASSERT(!vn_in_dnlc(ZTOV(sharezp))); /* not valid to move */
POINTER_INVALIDATE(&sharezp->z_zfsvfs);
error = zap_add(zfsvfs->z_os, MASTER_NODE_OBJ,
ZFS_SHARES_DIR, 8, 1, &sharezp->z_id, tx);
zfsvfs->z_shares_dir = sharezp->z_id;
zfs_acl_ids_free(&acl_ids);
// ZTOV(sharezp)->v_count = 0;
sa_handle_destroy(sharezp->z_sa_hdl);
kmem_cache_free(znode_cache, sharezp);
return (error);
#else
return (0);
#endif /* HAVE_SMB_SHARE */
}
/*
* XXX: We cannot use this function as a cache constructor, because
* there is one global cache for all file systems and we need
* to pass vfsp here, which is not possible, because argument
* 'cdrarg' is defined at kmem_cache_create() time.
*/
static int
zfs_znode_cache_constructor(void *buf, void *arg, int kmflags)
{
znode_t *zp = buf;
vnode_t *vp;
vfs_t *vfsp = arg;
int error;
POINTER_INVALIDATE(&zp->z_zfsvfs);
ASSERT(!POINTER_IS_VALID(zp->z_zfsvfs));
if (vfsp != NULL) {
error = getnewvnode("zfs", vfsp, &zfs_vnodeops, &vp);
if (error != 0 && (kmflags & KM_NOSLEEP))
return (-1);
ASSERT(error == 0);
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, curthread);
zp->z_vnode = vp;
vp->v_data = (caddr_t)zp;
VN_LOCK_AREC(vp);
} else {
zp->z_vnode = NULL;
}
list_link_init(&zp->z_link_node);
mutex_init(&zp->z_lock, NULL, MUTEX_DEFAULT, NULL);
rw_init(&zp->z_map_lock, NULL, RW_DEFAULT, NULL);
rw_init(&zp->z_parent_lock, NULL, RW_DEFAULT, NULL);
rw_init(&zp->z_name_lock, NULL, RW_DEFAULT, NULL);
mutex_init(&zp->z_acl_lock, NULL, MUTEX_DEFAULT, NULL);
mutex_init(&zp->z_range_lock, NULL, MUTEX_DEFAULT, NULL);
avl_create(&zp->z_range_avl, zfs_range_compare,
sizeof (rl_t), offsetof(rl_t, r_node));
zp->z_dbuf = NULL;
zp->z_dirlocks = NULL;
return (0);
}
