/*
* Set an extended attribute.
* This transaction must have called udmu_xattr_declare_set() first.
*
* Returns 0 on success or a negative error number on failure.
*
* No locking is done here.
*/
static int
__osd_sa_xattr_update(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;
char *dxattr;
size_t sa_size;
int rc;
ENTRY;
LASSERT(obj->oo_sa_hdl);
LASSERT(obj->oo_sa_xattr);
/* Update the SA for additions, modifications, and removals. */
rc = -nvlist_size(obj->oo_sa_xattr, &sa_size, NV_ENCODE_XDR);
if (rc)
return rc;
dxattr = sa_spill_alloc(KM_SLEEP);
if (dxattr == NULL)
RETURN(-ENOMEM);
rc = -nvlist_pack(obj->oo_sa_xattr, &dxattr, &sa_size,
NV_ENCODE_XDR, KM_SLEEP);
if (rc)
GOTO(out_free, rc);
rc = osd_object_sa_update(obj, SA_ZPL_DXATTR(uos), dxattr, sa_size, oh);
out_free:
sa_spill_free(dxattr);
RETURN(rc);
}
/*
* Copy an extended attribute into the buffer provided, or compute the
* required buffer size.
*
* If buf is NULL, it computes the required buffer size.
*
* Returns 0 on success or a negative error number on failure.
* On success, the number of bytes used / required is stored in 'size'.
*
* No locking is done here.
*/
int __osd_xattr_load(udmu_objset_t *uos, uint64_t dnode, nvlist_t **sa_xattr)
{
sa_handle_t *sa_hdl;
char *buf;
int rc, size;
if (unlikely(dnode == ZFS_NO_OBJECT))
return -ENOENT;
rc = -sa_handle_get(uos->os, dnode, NULL, SA_HDL_PRIVATE, &sa_hdl);
if (rc)
return rc;
rc = -sa_size(sa_hdl, SA_ZPL_DXATTR(uos), &size);
if (rc) {
if (rc == -ENOENT)
rc = -nvlist_alloc(sa_xattr, NV_UNIQUE_NAME, KM_SLEEP);
goto out_sa;
}
buf = sa_spill_alloc(KM_SLEEP);
if (buf == NULL) {
rc = -ENOMEM;
goto out_sa;
}
rc = -sa_lookup(sa_hdl, SA_ZPL_DXATTR(uos), buf, size);
if (rc == 0)
rc = -nvlist_unpack(buf, size, sa_xattr, KM_SLEEP);
sa_spill_free(buf);
out_sa:
sa_handle_destroy(sa_hdl);
return rc;
}
/*
* Copy an extended attribute into the buffer provided, or compute the
* required buffer size.
*
* If buf is NULL, it computes the required buffer size.
*
* Returns 0 on success or a negative error number on failure.
* On success, the number of bytes used / required is stored in 'size'.
*
* No locking is done here.
*/
int __osd_xattr_cache(const struct lu_env *env, struct osd_object *obj)
{
struct osd_device *osd = osd_obj2dev(obj);
udmu_objset_t *uos = &osd->od_objset;
sa_handle_t *sa_hdl;
char *buf;
int size;
int rc;
LASSERT(obj->oo_sa_xattr == NULL);
LASSERT(obj->oo_db != NULL);
rc = -sa_handle_get(uos->os, obj->oo_db->db_object, NULL,
SA_HDL_PRIVATE, &sa_hdl);
if (rc)
return rc;
rc = -sa_size(sa_hdl, SA_ZPL_DXATTR(uos), &size);
if (rc) {
if (rc == -ENOENT)
rc = -nvlist_alloc(&obj->oo_sa_xattr,
NV_UNIQUE_NAME, KM_SLEEP);
goto out_sa;
}
buf = sa_spill_alloc(KM_SLEEP);
if (buf == NULL) {
rc = -ENOMEM;
goto out_sa;
}
rc = -sa_lookup(sa_hdl, SA_ZPL_DXATTR(uos), buf, size);
if (rc == 0)
rc = -nvlist_unpack(buf, size, &obj->oo_sa_xattr, KM_SLEEP);
sa_spill_free(buf);
out_sa:
sa_handle_destroy(sa_hdl);
return rc;
}