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6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
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10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
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17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
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21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2012, 2014, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/osd-zfs/osd_xattr.c
37 * functions to manipulate extended attributes and system attributes
39 * Author: Alex Zhuravlev <bzzz@whamcloud.com>
40 * Author: Mike Pershin <tappro@whamcloud.com>
43 #define DEBUG_SUBSYSTEM S_OSD
45 #include <lustre_ver.h>
46 #include <libcfs/libcfs.h>
47 #include <obd_support.h>
48 #include <lustre_net.h>
50 #include <obd_class.h>
51 #include <lustre_disk.h>
52 #include <lustre_fid.h>
54 #include "osd_internal.h"
56 #include <sys/dnode.h>
61 #include <sys/spa_impl.h>
62 #include <sys/zfs_znode.h>
63 #include <sys/dmu_tx.h>
64 #include <sys/dmu_objset.h>
65 #include <sys/dsl_prop.h>
66 #include <sys/sa_impl.h>
69 #include <linux/posix_acl_xattr.h>
72 int __osd_xattr_load(struct osd_device *osd, uint64_t dnode, nvlist_t **sa)
78 if (unlikely(dnode == ZFS_NO_OBJECT))
81 rc = -sa_handle_get(osd->od_os, dnode, NULL, SA_HDL_PRIVATE, &sa_hdl);
85 rc = -sa_size(sa_hdl, SA_ZPL_DXATTR(osd), &size);
88 rc = -nvlist_alloc(sa, NV_UNIQUE_NAME, KM_SLEEP);
92 buf = osd_zio_buf_alloc(size);
97 rc = -sa_lookup(sa_hdl, SA_ZPL_DXATTR(osd), buf, size);
99 rc = -nvlist_unpack(buf, size, sa, KM_SLEEP);
100 osd_zio_buf_free(buf, size);
102 sa_handle_destroy(sa_hdl);
107 static inline int __osd_xattr_cache(const struct lu_env *env,
108 struct osd_object *obj)
110 LASSERT(obj->oo_sa_xattr == NULL);
111 LASSERT(obj->oo_db != NULL);
113 return __osd_xattr_load(osd_obj2dev(obj), obj->oo_db->db_object,
118 __osd_sa_xattr_get(const struct lu_env *env, struct osd_object *obj,
119 const struct lu_buf *buf, const char *name, int *sizep)
124 LASSERT(obj->oo_sa_hdl);
126 if (obj->oo_sa_xattr == NULL) {
127 rc = __osd_xattr_cache(env, obj);
132 LASSERT(obj->oo_sa_xattr);
133 rc = -nvlist_lookup_byte_array(obj->oo_sa_xattr, name, &nv_value,
138 if (buf == NULL || buf->lb_buf == NULL) {
139 /* return the required size by *sizep */
143 if (*sizep > buf->lb_len)
144 return -ERANGE; /* match ldiskfs error */
146 memcpy(buf->lb_buf, nv_value, *sizep);
150 int __osd_xattr_get_large(const struct lu_env *env, struct osd_device *osd,
151 uint64_t xattr, struct lu_buf *buf,
152 const char *name, int *sizep)
154 dmu_buf_t *xa_data_db;
155 sa_handle_t *sa_hdl = NULL;
156 uint64_t xa_data_obj, size;
159 /* are there any extended attributes? */
160 if (xattr == ZFS_NO_OBJECT)
163 /* Lookup the object number containing the xattr data */
164 rc = -zap_lookup(osd->od_os, xattr, name, sizeof(uint64_t), 1,
169 rc = __osd_obj2dbuf(env, osd->od_os, xa_data_obj, &xa_data_db);
173 rc = -sa_handle_get(osd->od_os, xa_data_obj, NULL, SA_HDL_PRIVATE,
178 /* Get the xattr value length / object size */
179 rc = -sa_lookup(sa_hdl, SA_ZPL_SIZE(osd), &size, 8);
183 if (size > INT_MAX) {
190 if (buf == NULL || buf->lb_buf == NULL) {
191 /* We only need to return the required size */
194 if (*sizep > buf->lb_len) {
195 rc = -ERANGE; /* match ldiskfs error */
199 rc = -dmu_read(osd->od_os, xa_data_db->db_object, 0,
200 size, buf->lb_buf, DMU_READ_PREFETCH);
203 sa_handle_destroy(sa_hdl);
205 dmu_buf_rele(xa_data_db, FTAG);
211 * Copy an extended attribute into the buffer provided, or compute
212 * the required buffer size if \a buf is NULL.
214 * On success, the number of bytes used or required is stored in \a sizep.
216 * Note that no locking is done here.
218 * \param[in] env execution environment
219 * \param[in] obj object for which to retrieve xattr
220 * \param[out] buf buffer to store xattr value in
221 * \param[in] name name of xattr to copy
222 * \param[out] sizep bytes used or required to store xattr
224 * \retval 0 on success
225 * \retval negative negated errno on failure
227 int __osd_xattr_get(const struct lu_env *env, struct osd_object *obj,
228 struct lu_buf *buf, const char *name, int *sizep)
232 /* check SA_ZPL_DXATTR first then fallback to directory xattr */
233 rc = __osd_sa_xattr_get(env, obj, buf, name, sizep);
237 return __osd_xattr_get_large(env, osd_obj2dev(obj), obj->oo_xattr,
241 int osd_xattr_get(const struct lu_env *env, struct dt_object *dt,
242 struct lu_buf *buf, const char *name)
244 struct osd_object *obj = osd_dt_obj(dt);
248 LASSERT(obj->oo_db != NULL);
249 LASSERT(osd_invariant(obj));
250 LASSERT(dt_object_exists(dt));
252 if (!osd_obj2dev(obj)->od_posix_acl &&
253 (strcmp(name, POSIX_ACL_XATTR_ACCESS) == 0 ||
254 strcmp(name, POSIX_ACL_XATTR_DEFAULT) == 0))
257 down(&obj->oo_guard);
258 rc = __osd_xattr_get(env, obj, buf, name, &size);
268 void __osd_xattr_declare_set(const struct lu_env *env, struct osd_object *obj,
269 int vallen, const char *name,
270 struct osd_thandle *oh)
272 struct osd_device *osd = osd_obj2dev(obj);
273 dmu_buf_t *db = obj->oo_db;
274 dmu_tx_t *tx = oh->ot_tx;
275 uint64_t xa_data_obj;
279 here = dt_object_exists(&obj->oo_dt);
281 /* object may be not yet created */
284 LASSERT(obj->oo_sa_hdl);
285 /* we might just update SA_ZPL_DXATTR */
286 dmu_tx_hold_sa(tx, obj->oo_sa_hdl, 1);
288 if (obj->oo_xattr == ZFS_NO_OBJECT)
292 if (!here || rc == -ENOENT) {
293 /* we'll be updating SA_ZPL_XATTR */
295 LASSERT(obj->oo_sa_hdl);
296 dmu_tx_hold_sa(tx, obj->oo_sa_hdl, 1);
298 /* xattr zap + entry */
299 dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, TRUE, (char *) name);
300 /* xattr value obj */
301 dmu_tx_hold_sa_create(tx, ZFS_SA_BASE_ATTR_SIZE);
302 dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, vallen);
306 rc = -zap_lookup(osd->od_os, obj->oo_xattr, name, sizeof(uint64_t), 1,
310 * Entry already exists.
311 * We'll truncate the existing object.
313 dmu_tx_hold_bonus(tx, xa_data_obj);
314 dmu_tx_hold_free(tx, xa_data_obj, vallen, DMU_OBJECT_END);
315 dmu_tx_hold_write(tx, xa_data_obj, 0, vallen);
317 } else if (rc == -ENOENT) {
319 * Entry doesn't exist, we need to create a new one and a new
320 * object to store the value.
322 dmu_tx_hold_bonus(tx, obj->oo_xattr);
323 dmu_tx_hold_zap(tx, obj->oo_xattr, TRUE, (char *) name);
324 dmu_tx_hold_sa_create(tx, ZFS_SA_BASE_ATTR_SIZE);
325 dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, vallen);
329 /* An error happened */
333 int osd_declare_xattr_set(const struct lu_env *env, struct dt_object *dt,
334 const struct lu_buf *buf, const char *name,
335 int fl, struct thandle *handle)
337 struct osd_object *obj = osd_dt_obj(dt);
338 struct osd_thandle *oh;
341 LASSERT(handle != NULL);
342 oh = container_of0(handle, struct osd_thandle, ot_super);
344 down(&obj->oo_guard);
345 __osd_xattr_declare_set(env, obj, buf->lb_len, name, oh);
352 * Set an extended attribute.
353 * This transaction must have called udmu_xattr_declare_set() first.
355 * Returns 0 on success or a negative error number on failure.
357 * No locking is done here.
360 __osd_sa_xattr_update(const struct lu_env *env, struct osd_object *obj,
361 struct osd_thandle *oh)
363 struct osd_device *osd = osd_obj2dev(obj);
369 LASSERT(obj->oo_sa_hdl);
370 LASSERT(obj->oo_sa_xattr);
372 /* Update the SA for additions, modifications, and removals. */
373 rc = -nvlist_size(obj->oo_sa_xattr, &sa_size, NV_ENCODE_XDR);
377 dxattr = osd_zio_buf_alloc(sa_size);
381 rc = -nvlist_pack(obj->oo_sa_xattr, &dxattr, &sa_size,
382 NV_ENCODE_XDR, KM_SLEEP);
386 rc = osd_object_sa_update(obj, SA_ZPL_DXATTR(osd), dxattr, sa_size, oh);
388 osd_zio_buf_free(dxattr, sa_size);
392 int __osd_sa_xattr_set(const struct lu_env *env, struct osd_object *obj,
393 const struct lu_buf *buf, const char *name, int fl,
394 struct osd_thandle *oh)
402 LASSERT(obj->oo_sa_hdl);
403 if (obj->oo_sa_xattr == NULL) {
404 rc = __osd_xattr_cache(env, obj);
409 LASSERT(obj->oo_sa_xattr);
410 /* Limited to 32k to keep nvpair memory allocations small */
411 if (buf->lb_len > DXATTR_MAX_ENTRY_SIZE) {
414 /* Prevent the DXATTR SA from consuming the entire SA
416 rc = -nvlist_size(obj->oo_sa_xattr, &size, NV_ENCODE_XDR);
420 if (size + buf->lb_len > DXATTR_MAX_SA_SIZE)
424 /* even in case of -EFBIG we must lookup xattr and check can we
425 * rewrite it then delete from SA */
426 rc = -nvlist_lookup_byte_array(obj->oo_sa_xattr, name, &nv_value,
429 if (fl & LU_XATTR_CREATE) {
431 } else if (too_big) {
432 rc = -nvlist_remove(obj->oo_sa_xattr, name,
433 DATA_TYPE_BYTE_ARRAY);
436 rc = __osd_sa_xattr_update(env, obj, oh);
437 return rc == 0 ? -EFBIG : rc;
439 } else if (rc == -ENOENT) {
440 if (fl & LU_XATTR_REPLACE)
448 /* Ensure xattr doesn't exist in ZAP */
449 if (obj->oo_xattr != ZFS_NO_OBJECT) {
450 struct osd_device *osd = osd_obj2dev(obj);
452 rc = -zap_lookup(osd->od_os, obj->oo_xattr,
455 rc = -dmu_object_free(osd->od_os, objid, oh->ot_tx);
457 zap_remove(osd->od_os, obj->oo_xattr,
462 rc = -nvlist_add_byte_array(obj->oo_sa_xattr, name,
463 (uchar_t *)buf->lb_buf, buf->lb_len);
467 rc = __osd_sa_xattr_update(env, obj, oh);
472 __osd_xattr_set(const struct lu_env *env, struct osd_object *obj,
473 const struct lu_buf *buf, const char *name, int fl,
474 struct osd_thandle *oh)
476 struct osd_device *osd = osd_obj2dev(obj);
477 dmu_buf_t *xa_zap_db = NULL;
478 dmu_buf_t *xa_data_db = NULL;
479 uint64_t xa_data_obj;
480 sa_handle_t *sa_hdl = NULL;
481 dmu_tx_t *tx = oh->ot_tx;
485 LASSERT(obj->oo_sa_hdl);
487 if (obj->oo_xattr == ZFS_NO_OBJECT) {
488 struct lu_attr *la = &osd_oti_get(env)->oti_la;
490 la->la_valid = LA_MODE;
491 la->la_mode = S_IFDIR | S_IRUGO | S_IWUSR | S_IXUGO;
492 rc = __osd_zap_create(env, osd, &xa_zap_db, tx, la,
493 obj->oo_db->db_object, 0);
497 obj->oo_xattr = xa_zap_db->db_object;
498 rc = osd_object_sa_update(obj, SA_ZPL_XATTR(osd),
499 &obj->oo_xattr, 8, oh);
504 rc = -zap_lookup(osd->od_os, obj->oo_xattr, name, sizeof(uint64_t), 1,
507 if (fl & LU_XATTR_CREATE) {
512 * Entry already exists.
513 * We'll truncate the existing object.
515 rc = __osd_obj2dbuf(env, osd->od_os, xa_data_obj,
520 rc = -sa_handle_get(osd->od_os, xa_data_obj, NULL,
521 SA_HDL_PRIVATE, &sa_hdl);
525 rc = -sa_lookup(sa_hdl, SA_ZPL_SIZE(osd), &size, 8);
529 rc = -dmu_free_range(osd->od_os, xa_data_db->db_object,
530 0, DMU_OBJECT_END, tx);
533 } else if (rc == -ENOENT) {
534 struct lu_attr *la = &osd_oti_get(env)->oti_la;
536 * Entry doesn't exist, we need to create a new one and a new
537 * object to store the value.
539 if (fl & LU_XATTR_REPLACE) {
540 /* should be ENOATTR according to the
541 * man, but that is undefined here */
546 la->la_valid = LA_MODE;
547 la->la_mode = S_IFREG | S_IRUGO | S_IWUSR;
548 rc = __osd_object_create(env, obj, &xa_data_db, tx, la,
552 xa_data_obj = xa_data_db->db_object;
554 rc = -sa_handle_get(osd->od_os, xa_data_obj, NULL,
555 SA_HDL_PRIVATE, &sa_hdl);
559 rc = -zap_add(osd->od_os, obj->oo_xattr, name, sizeof(uint64_t),
560 1, &xa_data_obj, tx);
564 /* There was an error looking up the xattr name */
568 /* Finally write the xattr value */
569 dmu_write(osd->od_os, xa_data_obj, 0, buf->lb_len, buf->lb_buf, tx);
572 rc = -sa_update(sa_hdl, SA_ZPL_SIZE(osd), &size, 8, tx);
575 sa_handle_destroy(sa_hdl);
577 if (xa_data_db != NULL)
578 dmu_buf_rele(xa_data_db, FTAG);
579 if (xa_zap_db != NULL)
580 dmu_buf_rele(xa_zap_db, FTAG);
585 int osd_xattr_set(const struct lu_env *env, struct dt_object *dt,
586 const struct lu_buf *buf, const char *name, int fl,
587 struct thandle *handle)
589 struct osd_object *obj = osd_dt_obj(dt);
590 struct osd_thandle *oh;
594 LASSERT(handle != NULL);
595 LASSERT(osd_invariant(obj));
596 LASSERT(dt_object_exists(dt));
599 if (!osd_obj2dev(obj)->od_posix_acl &&
600 (strcmp(name, POSIX_ACL_XATTR_ACCESS) == 0 ||
601 strcmp(name, POSIX_ACL_XATTR_DEFAULT) == 0))
604 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LINKEA_OVERFLOW) &&
605 strcmp(name, XATTR_NAME_LINK) == 0)
608 oh = container_of0(handle, struct osd_thandle, ot_super);
610 down(&obj->oo_guard);
611 CDEBUG(D_INODE, "Setting xattr %s with size %d\n",
612 name, (int)buf->lb_len);
613 rc = osd_xattr_set_internal(env, obj, buf, name, fl, oh);
620 __osd_xattr_declare_del(const struct lu_env *env, struct osd_object *obj,
621 const char *name, struct osd_thandle *oh)
623 struct osd_device *osd = osd_obj2dev(obj);
624 dmu_tx_t *tx = oh->ot_tx;
625 uint64_t xa_data_obj;
628 /* update SA_ZPL_DXATTR if xattr was in SA */
629 dmu_tx_hold_sa(tx, obj->oo_sa_hdl, 0);
631 if (obj->oo_xattr == ZFS_NO_OBJECT)
634 rc = -zap_lookup(osd->od_os, obj->oo_xattr, name, 8, 1, &xa_data_obj);
638 * We'll delete the existing object and ZAP entry.
640 dmu_tx_hold_bonus(tx, xa_data_obj);
641 dmu_tx_hold_free(tx, xa_data_obj, 0, DMU_OBJECT_END);
642 dmu_tx_hold_zap(tx, obj->oo_xattr, FALSE, (char *) name);
644 } else if (rc == -ENOENT) {
646 * Entry doesn't exist, nothing to be changed.
651 /* An error happened */
655 int osd_declare_xattr_del(const struct lu_env *env, struct dt_object *dt,
656 const char *name, struct thandle *handle)
658 struct osd_object *obj = osd_dt_obj(dt);
659 struct osd_thandle *oh;
662 LASSERT(handle != NULL);
663 LASSERT(dt_object_exists(dt));
664 LASSERT(osd_invariant(obj));
666 oh = container_of0(handle, struct osd_thandle, ot_super);
667 LASSERT(oh->ot_tx != NULL);
668 LASSERT(obj->oo_db != NULL);
670 down(&obj->oo_guard);
671 __osd_xattr_declare_del(env, obj, name, oh);
677 int __osd_sa_xattr_del(const struct lu_env *env, struct osd_object *obj,
678 const char *name, struct osd_thandle *oh)
682 if (obj->oo_sa_xattr == NULL) {
683 rc = __osd_xattr_cache(env, obj);
688 rc = -nvlist_remove(obj->oo_sa_xattr, name, DATA_TYPE_BYTE_ARRAY);
690 rc = __osd_sa_xattr_update(env, obj, oh);
694 int __osd_xattr_del(const struct lu_env *env, struct osd_object *obj,
695 const char *name, struct osd_thandle *oh)
697 struct osd_device *osd = osd_obj2dev(obj);
698 uint64_t xa_data_obj;
701 /* try remove xattr from SA at first */
702 rc = __osd_sa_xattr_del(env, obj, name, oh);
706 if (obj->oo_xattr == ZFS_NO_OBJECT)
709 rc = -zap_lookup(osd->od_os, obj->oo_xattr, name, sizeof(uint64_t), 1,
713 } else if (rc == 0) {
716 * We'll delete the existing object and ZAP entry.
718 rc = -dmu_object_free(osd->od_os, xa_data_obj, oh->ot_tx);
722 rc = -zap_remove(osd->od_os, obj->oo_xattr, name, oh->ot_tx);
728 int osd_xattr_del(const struct lu_env *env, struct dt_object *dt,
729 const char *name, struct thandle *handle)
731 struct osd_object *obj = osd_dt_obj(dt);
732 struct osd_thandle *oh;
736 LASSERT(handle != NULL);
737 LASSERT(obj->oo_db != NULL);
738 LASSERT(osd_invariant(obj));
739 LASSERT(dt_object_exists(dt));
740 oh = container_of0(handle, struct osd_thandle, ot_super);
741 LASSERT(oh->ot_tx != NULL);
743 if (!osd_obj2dev(obj)->od_posix_acl &&
744 (strcmp(name, POSIX_ACL_XATTR_ACCESS) == 0 ||
745 strcmp(name, POSIX_ACL_XATTR_DEFAULT) == 0))
748 down(&obj->oo_guard);
749 rc = __osd_xattr_del(env, obj, name, oh);
755 void osd_declare_xattrs_destroy(const struct lu_env *env,
756 struct osd_object *obj, struct osd_thandle *oh)
758 struct osd_device *osd = osd_obj2dev(obj);
759 zap_attribute_t *za = &osd_oti_get(env)->oti_za;
760 uint64_t oid = obj->oo_xattr, xid;
761 dmu_tx_t *tx = oh->ot_tx;
765 if (oid == ZFS_NO_OBJECT)
766 return; /* Nothing to do for SA xattrs */
768 /* Declare to free the ZAP holding xattrs */
769 dmu_tx_hold_free(tx, oid, 0, DMU_OBJECT_END);
771 rc = osd_zap_cursor_init(&zc, osd->od_os, oid, 0);
775 while (zap_cursor_retrieve(zc, za) == 0) {
776 LASSERT(za->za_num_integers == 1);
777 LASSERT(za->za_integer_length == sizeof(uint64_t));
779 rc = -zap_lookup(osd->od_os, oid, za->za_name,
780 sizeof(uint64_t), 1, &xid);
782 CERROR("%s: xattr %s lookup failed: rc = %d\n",
783 osd->od_svname, za->za_name, rc);
786 dmu_tx_hold_free(tx, xid, 0, DMU_OBJECT_END);
788 zap_cursor_advance(zc);
791 osd_zap_cursor_fini(zc);
793 if (rc && tx->tx_err == 0)
797 int osd_xattrs_destroy(const struct lu_env *env,
798 struct osd_object *obj, struct osd_thandle *oh)
800 struct osd_device *osd = osd_obj2dev(obj);
801 dmu_tx_t *tx = oh->ot_tx;
802 zap_attribute_t *za = &osd_oti_get(env)->oti_za;
807 /* The transaction must have been assigned to a transaction group. */
808 LASSERT(tx->tx_txg != 0);
810 if (obj->oo_xattr == ZFS_NO_OBJECT)
811 return 0; /* Nothing to do for SA xattrs */
813 /* Free the ZAP holding the xattrs */
814 rc = osd_zap_cursor_init(&zc, osd->od_os, obj->oo_xattr, 0);
818 while (zap_cursor_retrieve(zc, za) == 0) {
819 LASSERT(za->za_num_integers == 1);
820 LASSERT(za->za_integer_length == sizeof(uint64_t));
822 rc = -zap_lookup(osd->od_os, obj->oo_xattr, za->za_name,
823 sizeof(uint64_t), 1, &xid);
825 CERROR("%s: lookup xattr %s failed: rc = %d\n",
826 osd->od_svname, za->za_name, rc);
828 rc = -dmu_object_free(osd->od_os, xid, tx);
830 CERROR("%s: free xattr %s failed: rc = %d\n",
831 osd->od_svname, za->za_name, rc);
833 zap_cursor_advance(zc);
835 osd_zap_cursor_fini(zc);
837 rc = -dmu_object_free(osd->od_os, obj->oo_xattr, tx);
839 CERROR("%s: free xattr "LPU64" failed: rc = %d\n",
840 osd->od_svname, obj->oo_xattr, rc);
846 osd_sa_xattr_list(const struct lu_env *env, struct osd_object *obj,
847 const struct lu_buf *lb)
849 nvpair_t *nvp = NULL;
850 int len, counted = 0;
853 if (obj->oo_sa_xattr == NULL) {
854 rc = __osd_xattr_cache(env, obj);
859 LASSERT(obj->oo_sa_xattr);
861 while ((nvp = nvlist_next_nvpair(obj->oo_sa_xattr, nvp)) != NULL) {
862 const char *name = nvpair_name(nvp);
864 if (!osd_obj2dev(obj)->od_posix_acl &&
865 (strcmp(name, POSIX_ACL_XATTR_ACCESS) == 0 ||
866 strcmp(name, POSIX_ACL_XATTR_DEFAULT) == 0))
870 if (lb->lb_buf != NULL) {
871 if (counted + len + 1 > lb->lb_len)
874 memcpy(lb->lb_buf + counted, name, len + 1);
881 int osd_xattr_list(const struct lu_env *env, struct dt_object *dt,
882 const struct lu_buf *lb)
884 struct osd_object *obj = osd_dt_obj(dt);
885 struct osd_device *osd = osd_obj2dev(obj);
886 zap_attribute_t *za = &osd_oti_get(env)->oti_za;
891 LASSERT(obj->oo_db != NULL);
892 LASSERT(osd_invariant(obj));
893 LASSERT(dt_object_exists(dt));
895 down(&obj->oo_guard);
897 rc = osd_sa_xattr_list(env, obj, lb);
903 /* continue with dnode xattr if any */
904 if (obj->oo_xattr == ZFS_NO_OBJECT)
905 GOTO(out, rc = counted);
907 rc = osd_zap_cursor_init(&zc, osd->od_os, obj->oo_xattr, 0);
911 while ((rc = -zap_cursor_retrieve(zc, za)) == 0) {
912 if (!osd_obj2dev(obj)->od_posix_acl &&
913 (strcmp(za->za_name, POSIX_ACL_XATTR_ACCESS) == 0 ||
914 strcmp(za->za_name, POSIX_ACL_XATTR_DEFAULT) == 0)) {
915 zap_cursor_advance(zc);
919 rc = strlen(za->za_name);
920 if (lb->lb_buf != NULL) {
921 if (counted + rc + 1 > lb->lb_len)
922 GOTO(out_fini, rc = -ERANGE);
924 memcpy(lb->lb_buf + counted, za->za_name, rc + 1);
928 zap_cursor_advance(zc);
930 if (rc == -ENOENT) /* no more kes in the index */
932 else if (unlikely(rc < 0))
937 osd_zap_cursor_fini(zc);