void
sa_update_user(sa_handle_t *newhdl, sa_handle_t *oldhdl)
{
(void) dmu_buf_update_user((dmu_buf_t *)newhdl->sa_bonus,
oldhdl, newhdl, NULL, sa_evict);
oldhdl->sa_bonus = NULL;
}
void
fzap_upgrade(zap_t *zap, dmu_tx_t *tx, zap_flags_t flags)
{
dmu_buf_t *db;
zap_leaf_t *l;
int i;
zap_phys_t *zp;
ASSERT(RW_WRITE_HELD(&zap->zap_rwlock));
zap->zap_ismicro = FALSE;
(void) dmu_buf_update_user(zap->zap_dbuf, zap, zap,
&zap->zap_f.zap_phys, zap_evict);
mutex_init(&zap->zap_f.zap_num_entries_mtx, 0, 0, 0);
zap->zap_f.zap_block_shift = highbit(zap->zap_dbuf->db_size) - 1;
zp = zap->zap_f.zap_phys;
/*
* explicitly zero it since it might be coming from an
* initialized microzap
*/
bzero(zap->zap_dbuf->db_data, zap->zap_dbuf->db_size);
zp->zap_block_type = ZBT_HEADER;
zp->zap_magic = ZAP_MAGIC;
zp->zap_ptrtbl.zt_shift = ZAP_EMBEDDED_PTRTBL_SHIFT(zap);
zp->zap_freeblk = 2; /* block 1 will be the first leaf */
zp->zap_num_leafs = 1;
zp->zap_num_entries = 0;
zp->zap_salt = zap->zap_salt;
zp->zap_normflags = zap->zap_normflags;
zp->zap_flags = flags;
/* block 1 will be the first leaf */
for (i = 0; i < (1<<zp->zap_ptrtbl.zt_shift); i++)
ZAP_EMBEDDED_PTRTBL_ENT(zap, i) = 1;
/*
* set up block 1 - the first leaf
*/
VERIFY(0 == dmu_buf_hold(zap->zap_objset, zap->zap_object,
1<<FZAP_BLOCK_SHIFT(zap), FTAG, &db, DMU_READ_NO_PREFETCH));
dmu_buf_will_dirty(db, tx);
l = kmem_zalloc(sizeof (zap_leaf_t), KM_PUSHPAGE);
l->l_dbuf = db;
l->l_phys = db->db_data;
zap_leaf_init(l, zp->zap_normflags != 0);
kmem_free(l, sizeof (zap_leaf_t));
dmu_buf_rele(db, FTAG);
}
void
zfs_znode_dmu_fini(znode_t *zp)
{
dmu_buf_t *db = zp->z_dbuf;
ASSERT(MUTEX_HELD(ZFS_OBJ_MUTEX(zp->z_zfsvfs, zp->z_id)) ||
zp->z_unlinked ||
RW_WRITE_HELD(&zp->z_zfsvfs->z_teardown_inactive_lock));
ASSERT(zp->z_dbuf != NULL);
zp->z_dbuf = NULL;
VERIFY(zp == dmu_buf_update_user(db, zp, NULL, NULL, NULL));
dmu_buf_rele(db, NULL);
}
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);
}
void
sa_handle_destroy(sa_handle_t *hdl)
{
mutex_enter(&hdl->sa_lock);
(void) dmu_buf_update_user((dmu_buf_t *)hdl->sa_bonus, hdl,
NULL, NULL, NULL);
if (hdl->sa_bonus_tab) {
sa_idx_tab_rele(hdl->sa_os, hdl->sa_bonus_tab);
hdl->sa_bonus_tab = NULL;
}
if (hdl->sa_spill_tab) {
sa_idx_tab_rele(hdl->sa_os, hdl->sa_spill_tab);
hdl->sa_spill_tab = NULL;
}
dmu_buf_rele(hdl->sa_bonus, NULL);
if (hdl->sa_spill)
dmu_buf_rele((dmu_buf_t *)hdl->sa_spill, NULL);
mutex_exit(&hdl->sa_lock);
kmem_cache_free(sa_cache, hdl);
}
