void
zfs_sa_set_scanstamp(znode_t *zp, xvattr_t *xvap, dmu_tx_t *tx)
{
zfsvfs_t *zfsvfs = zp->z_zfsvfs;
xoptattr_t *xoap;
ASSERT(MUTEX_HELD(&zp->z_lock));
VERIFY((xoap = xva_getxoptattr(xvap)) != NULL);
if (zp->z_is_sa)
VERIFY(0 == sa_update(zp->z_sa_hdl, SA_ZPL_SCANSTAMP(zfsvfs),
&xoap->xoa_av_scanstamp,
sizeof (xoap->xoa_av_scanstamp), tx));
else {
dmu_object_info_t doi;
dmu_buf_t *db = sa_get_db(zp->z_sa_hdl);
int len;
sa_object_info(zp->z_sa_hdl, &doi);
len = sizeof (xoap->xoa_av_scanstamp) +
ZFS_OLD_ZNODE_PHYS_SIZE;
if (len > doi.doi_bonus_size)
VERIFY(dmu_set_bonus(db, len, tx) == 0);
(void) memcpy((caddr_t)db->db_data + ZFS_OLD_ZNODE_PHYS_SIZE,
xoap->xoa_av_scanstamp, sizeof (xoap->xoa_av_scanstamp));
zp->z_pflags |= ZFS_BONUS_SCANSTAMP;
VERIFY(0 == sa_update(zp->z_sa_hdl, SA_ZPL_FLAGS(zfsvfs),
&zp->z_pflags, sizeof (uint64_t), tx));
}
}
void
zfs_sa_symlink(znode_t *zp, char *link, int len, dmu_tx_t *tx)
{
dmu_buf_t *db = sa_get_db(zp->z_sa_hdl);
if (ZFS_OLD_ZNODE_PHYS_SIZE + len <= dmu_bonus_max()) {
VERIFY(dmu_set_bonus(db,
len + ZFS_OLD_ZNODE_PHYS_SIZE, tx) == 0);
if (len) {
bcopy(link, (caddr_t)db->db_data +
ZFS_OLD_ZNODE_PHYS_SIZE, len);
}
} else {
dmu_buf_t *dbp;
zfs_grow_blocksize(zp, len, tx);
VERIFY(0 == dmu_buf_hold(zp->z_zfsvfs->z_os,
zp->z_id, 0, FTAG, &dbp, DMU_READ_NO_PREFETCH));
dmu_buf_will_dirty(dbp, tx);
ASSERT3U(len, <=, dbp->db_size);
bcopy(link, dbp->db_data, len);
dmu_buf_rele(dbp, FTAG);
}
}
/*
* Find layout that corresponds to ordering of attributes
* If not found a new layout number is created and added to
* persistent layout tables.
*/
static int
sa_build_layouts(sa_handle_t *hdl, sa_bulk_attr_t *attr_desc, int attr_count,
dmu_tx_t *tx)
{
sa_os_t *sa = hdl->sa_os->os_sa;
uint64_t hash;
sa_buf_type_t buftype;
sa_hdr_phys_t *sahdr;
void *data_start;
int buf_space;
sa_attr_type_t *attrs, *attrs_start;
int i, lot_count;
int hdrsize, spillhdrsize;
int used;
dmu_object_type_t bonustype;
sa_lot_t *lot;
int len_idx;
int spill_used;
boolean_t spilling;
dmu_buf_will_dirty(hdl->sa_bonus, tx);
bonustype = SA_BONUSTYPE_FROM_DB(hdl->sa_bonus);
/* first determine bonus header size and sum of all attributes */
hdrsize = sa_find_sizes(sa, attr_desc, attr_count, hdl->sa_bonus,
SA_BONUS, &i, &used, &spilling);
if (used > SPA_MAXBLOCKSIZE)
return (EFBIG);
VERIFY(0 == dmu_set_bonus(hdl->sa_bonus, spilling ?
MIN(DN_MAX_BONUSLEN - sizeof (blkptr_t), used + hdrsize) :
used + hdrsize, tx));
ASSERT((bonustype == DMU_OT_ZNODE && spilling == 0) ||
bonustype == DMU_OT_SA);
/* setup and size spill buffer when needed */
if (spilling) {
boolean_t dummy;
if (hdl->sa_spill == NULL) {
VERIFY(dmu_spill_hold_by_bonus(hdl->sa_bonus, NULL,
&hdl->sa_spill) == 0);
}
dmu_buf_will_dirty(hdl->sa_spill, tx);
spillhdrsize = sa_find_sizes(sa, &attr_desc[i],
attr_count - i, hdl->sa_spill, SA_SPILL, &i,
&spill_used, &dummy);
if (spill_used > SPA_MAXBLOCKSIZE)
return (EFBIG);
buf_space = hdl->sa_spill->db_size - spillhdrsize;
if (BUF_SPACE_NEEDED(spill_used, spillhdrsize) >
hdl->sa_spill->db_size)
VERIFY(0 == sa_resize_spill(hdl,
BUF_SPACE_NEEDED(spill_used, spillhdrsize), tx));
}
/* setup starting pointers to lay down data */
data_start = (void *)((uintptr_t)hdl->sa_bonus->db_data + hdrsize);
sahdr = (sa_hdr_phys_t *)hdl->sa_bonus->db_data;
buftype = SA_BONUS;
if (spilling)
buf_space = (sa->sa_force_spill) ?
0 : SA_BLKPTR_SPACE - hdrsize;
else
buf_space = hdl->sa_bonus->db_size - hdrsize;
attrs_start = attrs = kmem_alloc(sizeof (sa_attr_type_t) * attr_count,
KM_SLEEP);
lot_count = 0;
for (i = 0, len_idx = 0, hash = -1ULL; i != attr_count; i++) {
uint16_t length;
attrs[i] = attr_desc[i].sa_attr;
length = SA_REGISTERED_LEN(sa, attrs[i]);
if (length == 0)
length = attr_desc[i].sa_length;
if (buf_space < length) { /* switch to spill buffer */
VERIFY(bonustype == DMU_OT_SA);
if (buftype == SA_BONUS && !sa->sa_force_spill) {
sa_find_layout(hdl->sa_os, hash, attrs_start,
lot_count, tx, &lot);
SA_SET_HDR(sahdr, lot->lot_num, hdrsize);
}
buftype = SA_SPILL;
hash = -1ULL;
len_idx = 0;
sahdr = (sa_hdr_phys_t *)hdl->sa_spill->db_data;
sahdr->sa_magic = SA_MAGIC;
data_start = (void *)((uintptr_t)sahdr +
spillhdrsize);
attrs_start = &attrs[i];
buf_space = hdl->sa_spill->db_size - spillhdrsize;
lot_count = 0;
}
hash ^= SA_ATTR_HASH(attrs[i]);
attr_desc[i].sa_addr = data_start;
attr_desc[i].sa_size = length;
SA_COPY_DATA(attr_desc[i].sa_data_func, attr_desc[i].sa_data,
data_start, length);
if (sa->sa_attr_table[attrs[i]].sa_length == 0) {
sahdr->sa_lengths[len_idx++] = length;
}
data_start = (void *)P2ROUNDUP(((uintptr_t)data_start +
length), 8);
buf_space -= P2ROUNDUP(length, 8);
lot_count++;
}
sa_find_layout(hdl->sa_os, hash, attrs_start, lot_count, tx, &lot);
/*
* Verify that old znodes always have layout number 0.
* Must be DMU_OT_SA for arbitrary layouts
*/
VERIFY((bonustype == DMU_OT_ZNODE && lot->lot_num == 0) ||
(bonustype == DMU_OT_SA && lot->lot_num > 1));
if (bonustype == DMU_OT_SA) {
SA_SET_HDR(sahdr, lot->lot_num,
buftype == SA_BONUS ? hdrsize : spillhdrsize);
}
kmem_free(attrs, sizeof (sa_attr_type_t) * attr_count);
if (hdl->sa_bonus_tab) {
sa_idx_tab_rele(hdl->sa_os, hdl->sa_bonus_tab);
hdl->sa_bonus_tab = NULL;
}
if (!sa->sa_force_spill)
VERIFY(0 == sa_build_index(hdl, SA_BONUS));
if (hdl->sa_spill) {
sa_idx_tab_rele(hdl->sa_os, hdl->sa_spill_tab);
if (!spilling) {
/*
* remove spill block that is no longer needed.
*/
dmu_buf_rele(hdl->sa_spill, NULL);
hdl->sa_spill = NULL;
hdl->sa_spill_tab = NULL;
VERIFY(0 == dmu_rm_spill(hdl->sa_os,
sa_handle_object(hdl), tx));
} else {
VERIFY(0 == sa_build_index(hdl, SA_SPILL));
}
}
return (0);
}
