/*
* return status :
* rc == 0 -> end of directory.
* rc > 0 -> ok, proceed.
* rc < 0 -> error. ( EOVERFLOW can be masked.)
*/
static int osd_dir_it_load(const struct lu_env *env,
const struct dt_it *di, __u64 hash)
{
struct osd_zap_it *it = (struct osd_zap_it *)di;
struct osd_object *obj = it->ozi_obj;
struct osd_device *osd = osd_obj2dev(obj);
zap_attribute_t *za = &osd_oti_get(env)->oti_za;
int rc;
ENTRY;
udmu_zap_cursor_fini(it->ozi_zc);
if (udmu_zap_cursor_init(&it->ozi_zc, &osd->od_objset,
obj->oo_db->db_object, hash))
RETURN(-ENOMEM);
if (hash <= 2) {
it->ozi_pos = hash;
rc = +1;
} else {
it->ozi_pos = 3;
/* to return whether the end has been reached */
rc = osd_index_retrieve_skip_dots(it, za);
if (rc == 0)
rc = +1;
else if (rc == -ENOENT)
rc = 0;
}
RETURN(rc);
}
/*
* return status :
* rc == 0 -> ok, proceed.
* rc > 0 -> end of directory.
* rc < 0 -> error. ( EOVERFLOW can be masked.)
*/
static int osd_zap_it_load(const struct lu_env *env,
const struct dt_it *di, __u64 hash)
{
struct osd_zap_it *it = (struct osd_zap_it *)di;
struct osd_object *obj = it->ozi_obj;
struct osd_device *osd = osd_obj2dev(obj);
int rc;
ENTRY;
udmu_zap_cursor_fini(it->ozi_zc);
if (udmu_zap_cursor_init(&it->ozi_zc, &osd->od_objset,
obj->oo_db->db_object, hash))
RETURN(-ENOMEM);
it->ozi_reset = 0;
/* same as osd_zap_it_next()*/
rc = -udmu_zap_cursor_retrieve_key(env, it->ozi_zc, NULL,
NAME_MAX + 1);
if (rc == 0)
RETURN(+1);
else if (rc == -ENOENT) /* end of dir*/
RETURN(0);
RETURN(rc);
}
int osd_xattr_list(const struct lu_env *env, struct dt_object *dt,
struct lu_buf *lb, struct lustre_capa *capa)
{
struct osd_thread_info *oti = osd_oti_get(env);
struct osd_object *obj = osd_dt_obj(dt);
struct osd_device *osd = osd_obj2dev(obj);
udmu_objset_t *uos = &osd->od_objset;
zap_cursor_t *zc;
int rc, counted = 0, remain = lb->lb_len;
ENTRY;
LASSERT(obj->oo_db != NULL);
LASSERT(osd_invariant(obj));
LASSERT(dt_object_exists(dt));
down(&obj->oo_guard);
rc = osd_sa_xattr_list(env, obj, lb);
if (rc < 0)
GOTO(out, rc);
counted = rc;
remain -= counted;
/* continue with dnode xattr if any */
if (obj->oo_xattr == ZFS_NO_OBJECT)
GOTO(out, rc = counted);
rc = -udmu_zap_cursor_init(&zc, uos, obj->oo_xattr, 0);
if (rc)
GOTO(out, rc);
while ((rc = -udmu_zap_cursor_retrieve_key(env, zc, oti->oti_key,
MAXNAMELEN)) == 0) {
rc = strlen(oti->oti_key);
if (lb->lb_buf != NULL) {
if (rc + 1 > remain)
RETURN(-ERANGE);
memcpy(lb->lb_buf, oti->oti_key, rc);
lb->lb_buf += rc;
*((char *)lb->lb_buf) = '\0';
lb->lb_buf++;
remain -= rc + 1;
}
counted += rc + 1;
zap_cursor_advance(zc);
}
if (rc < 0)
GOTO(out_fini, rc);
rc = counted;
out_fini:
udmu_zap_cursor_fini(zc);
out:
up(&obj->oo_guard);
RETURN(rc);
}
/**
* Free given iterator.
*
* \param di - osd iterator
*/
static void osd_it_acct_fini(const struct lu_env *env, struct dt_it *di)
{
struct osd_it_quota *it = (struct osd_it_quota *)di;
ENTRY;
udmu_zap_cursor_fini(it->oiq_zc);
lu_object_put(env, &it->oiq_obj->oo_dt.do_lu);
EXIT;
}
static void __osd_declare_object_destroy(const struct lu_env *env,
struct osd_object *obj,
struct osd_thandle *oh)
{
struct osd_device *osd = osd_obj2dev(obj);
udmu_objset_t *uos = &osd->od_objset;
dmu_buf_t *db = obj->oo_db;
zap_attribute_t *za = &osd_oti_get(env)->oti_za;
uint64_t oid = db->db_object, xid;
dmu_tx_t *tx = oh->ot_tx;
zap_cursor_t *zc;
int rc = 0;
dmu_tx_hold_free(tx, oid, 0, DMU_OBJECT_END);
/* zap holding xattrs */
if (obj->oo_xattr != ZFS_NO_OBJECT) {
oid = obj->oo_xattr;
dmu_tx_hold_free(tx, oid, 0, DMU_OBJECT_END);
rc = -udmu_zap_cursor_init(&zc, uos, oid, 0);
if (rc)
goto out;
while ((rc = -zap_cursor_retrieve(zc, za)) == 0) {
BUG_ON(za->za_integer_length != sizeof(uint64_t));
BUG_ON(za->za_num_integers != 1);
rc = -zap_lookup(uos->os, obj->oo_xattr, za->za_name,
sizeof(uint64_t), 1, &xid);
if (rc) {
CERROR("%s: xattr lookup failed: rc = %d\n",
osd->od_svname, rc);
goto out_err;
}
dmu_tx_hold_free(tx, xid, 0, DMU_OBJECT_END);
zap_cursor_advance(zc);
}
if (rc == -ENOENT)
rc = 0;
out_err:
udmu_zap_cursor_fini(zc);
}
out:
if (rc && tx->tx_err == 0)
tx->tx_err = -rc;
}
static void osd_index_it_fini(const struct lu_env *env, struct dt_it *di)
{
struct osd_zap_it *it = (struct osd_zap_it *)di;
struct osd_object *obj;
ENTRY;
LASSERT(it);
LASSERT(it->ozi_obj);
obj = it->ozi_obj;
udmu_zap_cursor_fini(it->ozi_zc);
lu_object_put(env, &obj->oo_dt.do_lu);
EXIT;
}
/*
* Delete a DMU object
*
* The transaction passed to this routine must have
* dmu_tx_hold_free(tx, oid, 0, DMU_OBJECT_END) called
* and then assigned to a transaction group.
*
* This will release db and set it to NULL to prevent further dbuf releases.
*/
static int __osd_object_destroy(const struct lu_env *env,
struct osd_object *obj,
dmu_tx_t *tx, void *tag)
{
struct osd_device *osd = osd_obj2dev(obj);
udmu_objset_t *uos = &osd->od_objset;
uint64_t xid;
zap_attribute_t *za = &osd_oti_get(env)->oti_za;
zap_cursor_t *zc;
int rc;
/* Assert that the transaction has been assigned to a
transaction group. */
LASSERT(tx->tx_txg != 0);
/* zap holding xattrs */
if (obj->oo_xattr != ZFS_NO_OBJECT) {
rc = -udmu_zap_cursor_init(&zc, uos, obj->oo_xattr, 0);
if (rc)
return rc;
while ((rc = -zap_cursor_retrieve(zc, za)) == 0) {
BUG_ON(za->za_integer_length != sizeof(uint64_t));
BUG_ON(za->za_num_integers != 1);
rc = -zap_lookup(uos->os, obj->oo_xattr, za->za_name,
sizeof(uint64_t), 1, &xid);
if (rc) {
CERROR("%s: lookup xattr %s failed: rc = %d\n",
osd->od_svname, za->za_name, rc);
continue;
}
rc = __osd_object_free(uos, xid, tx);
if (rc)
CERROR("%s: fetch xattr %s failed: rc = %d\n",
osd->od_svname, za->za_name, rc);
zap_cursor_advance(zc);
}
udmu_zap_cursor_fini(zc);
rc = __osd_object_free(uos, obj->oo_xattr, tx);
if (rc)
CERROR("%s: freeing xattr failed: rc = %d\n",
osd->od_svname, rc);
}
return __osd_object_free(uos, obj->oo_db->db_object, tx);
}
/**
* Move Iterator to record specified by \a key
*
* \param di osd iterator
* \param key key for index
*
* \retval +ve di points to record with least key not larger than key
* \retval 0 di points to exact matched key
* \retval -ve failure
*/
static int osd_dir_it_get(const struct lu_env *env,
struct dt_it *di, const struct dt_key *key)
{
struct osd_zap_it *it = (struct osd_zap_it *)di;
struct osd_object *obj = it->ozi_obj;
struct osd_device *osd = osd_obj2dev(obj);
char *name = (char *)key;
int rc;
ENTRY;
LASSERT(it);
LASSERT(it->ozi_zc);
udmu_zap_cursor_fini(it->ozi_zc);
if (udmu_zap_cursor_init(&it->ozi_zc, &osd->od_objset,
obj->oo_db->db_object, 0))
RETURN(-ENOMEM);
/* XXX: implementation of the API is broken at the moment */
LASSERT(((const char *)key)[0] == 0);
if (name[0] == 0) {
it->ozi_pos = 0;
RETURN(1);
}
if (name[0] == '.') {
if (name[1] == 0) {
it->ozi_pos = 1;
GOTO(out, rc = 1);
} else if (name[1] == '.' && name[2] == 0) {
it->ozi_pos = 2;
GOTO(out, rc = 1);
}
}
/* neither . nor .. - some real record */
it->ozi_pos = 3;
rc = +1;
out:
RETURN(rc);
}
static int osd_zap_it_get(const struct lu_env *env,
struct dt_it *di, const struct dt_key *key)
{
struct osd_zap_it *it = (struct osd_zap_it *)di;
struct osd_object *obj = it->ozi_obj;
struct osd_device *osd = osd_obj2dev(obj);
ENTRY;
LASSERT(it);
LASSERT(it->ozi_zc);
/* XXX: API is broken at the moment */
LASSERT(((const char *)key)[0] == '\0');
udmu_zap_cursor_fini(it->ozi_zc);
if (udmu_zap_cursor_init(&it->ozi_zc, &osd->od_objset,
obj->oo_db->db_object, 0))
RETURN(-ENOMEM);
it->ozi_reset = 1;
RETURN(+1);
}
/**
* Restore iterator from cookie. if the \a hash isn't found,
* restore the first valid record.
*
* \param di - osd iterator
* \param hash - iterator location cookie
*
* \retval +ve - di points to exact matched key
* \retval 0 - di points to the first valid record
* \retval -ve - failure
*/
static int osd_it_acct_load(const struct lu_env *env,
const struct dt_it *di, __u64 hash)
{
struct osd_it_quota *it = (struct osd_it_quota *)di;
struct osd_device *osd = osd_obj2dev(it->oiq_obj);
zap_cursor_t *zc;
int rc;
ENTRY;
/* create new cursor pointing to the new hash */
rc = -udmu_zap_cursor_init(&zc, &osd->od_objset, it->oiq_oid, hash);
if (rc)
RETURN(rc);
udmu_zap_cursor_fini(it->oiq_zc);
it->oiq_zc = zc;
it->oiq_reset = 0;
rc = -udmu_zap_cursor_retrieve_key(env, it->oiq_zc, NULL, 32);
if (rc == 0)
RETURN(+1);
else if (rc == -ENOENT)
RETURN(0);
RETURN(rc);
}