4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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,
8 * as published by the Free Software Foundation.
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).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2013, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/mdt/mdt_xattr.c
38 * Lustre Metadata Target (mdt) extended attributes management.
40 * Author: Peter Braam <braam@clusterfs.com>
41 * Author: Andreas Dilger <adilger@clusterfs.com>
42 * Author: Phil Schwan <phil@clusterfs.com>
43 * Author: Huang Hua <huanghua@clusterfs.com>
46 #define DEBUG_SUBSYSTEM S_MDS
48 #include <linux/xattr.h>
49 #include <lustre_acl.h>
50 #include "mdt_internal.h"
53 /* return EADATA length to the caller. negative value means error */
54 static int mdt_getxattr_pack_reply(struct mdt_thread_info * info)
56 struct req_capsule *pill = info->mti_pill ;
57 struct ptlrpc_request *req = mdt_info_req(info);
60 static const char user_string[] = "user.";
64 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_GETXATTR_PACK))
67 valid = info->mti_body->mbo_valid & (OBD_MD_FLXATTR | OBD_MD_FLXATTRLS);
69 /* Determine how many bytes we need */
70 if (valid == OBD_MD_FLXATTR) {
71 xattr_name = req_capsule_client_get(pill, &RMF_NAME);
75 if (!(exp_connect_flags(req->rq_export) & OBD_CONNECT_XATTR) &&
76 !strncmp(xattr_name, user_string, sizeof(user_string) - 1))
79 size = mo_xattr_get(info->mti_env,
80 mdt_object_child(info->mti_object),
81 &LU_BUF_NULL, xattr_name);
82 } else if (valid == OBD_MD_FLXATTRLS) {
83 size = mo_xattr_list(info->mti_env,
84 mdt_object_child(info->mti_object),
86 } else if (valid == OBD_MD_FLXATTRALL) {
87 /* N.B. eadatasize = 0 is not valid for FLXATTRALL */
88 /* We could calculate accurate sizes, but this would
89 * introduce a lot of overhead, let's do it later... */
90 size = info->mti_body->mbo_eadatasize;
91 req_capsule_set_size(pill, &RMF_EAVALS, RCL_SERVER, size);
92 req_capsule_set_size(pill, &RMF_EAVALS_LENS, RCL_SERVER, size);
94 CDEBUG(D_INFO, "Valid bits: "LPX64"\n",
95 info->mti_body->mbo_valid);
99 if (size == -ENODATA) {
101 } else if (size < 0) {
102 if (size != -EOPNOTSUPP)
103 CERROR("Error geting EA size: %d\n", size);
107 req_capsule_set_size(pill, &RMF_EADATA, RCL_SERVER,
108 info->mti_body->mbo_eadatasize == 0 ? 0 : size);
109 rc = req_capsule_server_pack(pill);
119 mdt_getxattr_one(struct mdt_thread_info *info,
120 char *xattr_name, struct md_object *next,
121 struct lu_buf *buf, struct mdt_export_data *med,
124 __u32 remote = exp_connect_rmtclient(info->mti_exp);
125 int flags = CFS_IC_NOTHING, rc;
129 CDEBUG(D_INODE, "getxattr %s\n", xattr_name);
131 rc = mo_xattr_get(info->mti_env, next, buf, xattr_name);
135 if (info->mti_body->mbo_valid &
136 (OBD_MD_FLRMTLSETFACL | OBD_MD_FLRMTLGETFACL))
138 else if (info->mti_body->mbo_valid & OBD_MD_FLRMTRGETFACL)
139 flags = CFS_IC_MAPPED;
141 if (rc > 0 && flags != CFS_IC_NOTHING) {
144 if (unlikely(!remote))
145 GOTO(out, rc = -EINVAL);
147 rc1 = lustre_posix_acl_xattr_id2client(uc,
149 (posix_acl_xattr_header *)(buf->lb_buf),
151 if (unlikely(rc1 < 0))
159 static int mdt_getxattr_all(struct mdt_thread_info *info,
160 struct mdt_body *reqbody, struct mdt_body *repbody,
161 struct lu_buf *buf, struct md_object *next)
163 const struct lu_env *env = info->mti_env;
164 struct ptlrpc_request *req = mdt_info_req(info);
165 struct mdt_export_data *med = mdt_req2med(req);
166 struct lu_ucred *uc = mdt_ucred(info);
167 char *v, *b, *eadatahead, *eadatatail;
169 int eadatasize, eavallen = 0, eavallens = 0, rc;
174 * The format of the pill is the following:
175 * EADATA: attr1\0attr2\0...attrn\0
176 * EAVALS: val1val2...valn
177 * EAVALS_LENS: 4,4,...4
180 eadatahead = buf->lb_buf;
182 /* Fill out EADATA first */
183 eadatasize = mo_xattr_list(env, next, buf);
185 GOTO(out, rc = eadatasize);
187 eadatatail = eadatahead + eadatasize;
189 v = req_capsule_server_get(info->mti_pill, &RMF_EAVALS);
190 sizes = req_capsule_server_get(info->mti_pill, &RMF_EAVALS_LENS);
192 /* Fill out EAVALS and EAVALS_LENS */
193 for (b = eadatahead; b < eadatatail; b += strlen(b) + 1, v += rc) {
195 buf->lb_len = reqbody->mbo_eadatasize - eavallen;
196 rc = mdt_getxattr_one(info, b, next, buf, med, uc);
200 sizes[eavallens] = rc;
205 repbody->mbo_aclsize = eavallen;
206 repbody->mbo_max_mdsize = eavallens;
208 req_capsule_shrink(info->mti_pill, &RMF_EAVALS, eavallen, RCL_SERVER);
209 req_capsule_shrink(info->mti_pill, &RMF_EAVALS_LENS,
210 eavallens * sizeof(__u32), RCL_SERVER);
211 req_capsule_shrink(info->mti_pill, &RMF_EADATA, eadatasize, RCL_SERVER);
213 GOTO(out, rc = eadatasize);
218 int mdt_getxattr(struct mdt_thread_info *info)
220 struct ptlrpc_request *req = mdt_info_req(info);
221 struct mdt_export_data *med = mdt_req2med(req);
222 struct lu_ucred *uc = lu_ucred(info->mti_env);
223 struct mdt_body *reqbody;
224 struct mdt_body *repbody = NULL;
225 struct md_object *next;
227 __u32 remote = exp_connect_rmtclient(info->mti_exp);
233 LASSERT(info->mti_object != NULL);
234 LASSERT(lu_object_assert_exists(&info->mti_object->mot_obj));
236 CDEBUG(D_INODE, "getxattr "DFID"\n", PFID(&info->mti_body->mbo_fid1));
238 reqbody = req_capsule_client_get(info->mti_pill, &RMF_MDT_BODY);
240 RETURN(err_serious(-EFAULT));
242 rc = mdt_init_ucred(info, reqbody);
244 RETURN(err_serious(rc));
246 next = mdt_object_child(info->mti_object);
248 if (info->mti_body->mbo_valid & OBD_MD_FLRMTRGETFACL) {
249 if (unlikely(!remote))
250 GOTO(out, rc = err_serious(-EINVAL));
252 perm = mdt_identity_get_perm(uc->uc_identity, remote,
254 if (!(perm & CFS_RMTACL_PERM))
255 GOTO(out, rc = err_serious(-EPERM));
257 rc = mo_permission(info->mti_env, NULL, next, NULL,
260 GOTO(out, rc = err_serious(rc));
263 easize = mdt_getxattr_pack_reply(info);
265 GOTO(out, rc = err_serious(easize));
267 repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
268 LASSERT(repbody != NULL);
270 /* No need further getxattr. */
271 if (easize == 0 || reqbody->mbo_eadatasize == 0)
272 GOTO(out, rc = easize);
274 buf = &info->mti_buf;
275 buf->lb_buf = req_capsule_server_get(info->mti_pill, &RMF_EADATA);
276 buf->lb_len = easize;
278 valid = info->mti_body->mbo_valid & (OBD_MD_FLXATTR | OBD_MD_FLXATTRLS);
280 if (valid == OBD_MD_FLXATTR) {
281 char *xattr_name = req_capsule_client_get(info->mti_pill,
283 rc = mdt_getxattr_one(info, xattr_name, next, buf, med, uc);
284 } else if (valid == OBD_MD_FLXATTRLS) {
285 CDEBUG(D_INODE, "listxattr\n");
287 rc = mo_xattr_list(info->mti_env, next, buf);
289 CDEBUG(D_INFO, "listxattr failed: %d\n", rc);
290 } else if (valid == OBD_MD_FLXATTRALL) {
291 rc = mdt_getxattr_all(info, reqbody, repbody,
299 mdt_counter_incr(req, LPROC_MDT_GETXATTR);
300 repbody->mbo_eadatasize = rc;
303 mdt_exit_ucred(info);
307 static int mdt_rmtlsetfacl(struct mdt_thread_info *info,
308 struct md_object *next,
309 const char *xattr_name,
310 ext_acl_xattr_header *header,
311 posix_acl_xattr_header **out)
313 struct ptlrpc_request *req = mdt_info_req(info);
314 struct mdt_export_data *med = mdt_req2med(req);
315 struct lu_ucred *uc = mdt_ucred(info);
316 struct lu_buf *buf = &info->mti_buf;
320 rc = lustre_ext_acl_xattr_id2server(uc, med->med_idmap, header);
324 rc = mo_xattr_get(info->mti_env, next, &LU_BUF_NULL, xattr_name);
331 if (buf->lb_len > 0) {
332 OBD_ALLOC_LARGE(buf->lb_buf, buf->lb_len);
333 if (unlikely(buf->lb_buf == NULL))
336 rc = mo_xattr_get(info->mti_env, next, buf, xattr_name);
338 CERROR("getxattr failed: %d\n", rc);
344 rc = lustre_acl_xattr_merge2posix((posix_acl_xattr_header *)(buf->lb_buf),
345 buf->lb_len, header, out);
349 if (rc <= 0 && buf->lb_buf != NULL)
350 OBD_FREE_LARGE(buf->lb_buf, buf->lb_len);
354 int mdt_reint_setxattr(struct mdt_thread_info *info,
355 struct mdt_lock_handle *unused)
357 struct ptlrpc_request *req = mdt_info_req(info);
358 struct lu_ucred *uc = lu_ucred(info->mti_env);
359 struct mdt_lock_handle *lh;
360 const struct lu_env *env = info->mti_env;
361 struct lu_buf *buf = &info->mti_buf;
362 struct mdt_reint_record *rr = &info->mti_rr;
363 struct md_attr *ma = &info->mti_attr;
364 struct lu_attr *attr = &info->mti_attr.ma_attr;
365 struct mdt_object *obj;
366 struct md_object *child;
367 __u64 valid = attr->la_valid;
368 const char *xattr_name = rr->rr_name.ln_name;
369 int xattr_len = rr->rr_eadatalen;
372 posix_acl_xattr_header *new_xattr = NULL;
373 __u32 remote = exp_connect_rmtclient(info->mti_exp);
377 CDEBUG(D_INODE, "setxattr for "DFID"\n", PFID(rr->rr_fid1));
379 if (info->mti_dlm_req)
380 ldlm_request_cancel(req, info->mti_dlm_req, 0);
382 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_SETXATTR))
383 RETURN(err_serious(-ENOMEM));
385 CDEBUG(D_INODE, "%s xattr %s\n",
386 valid & OBD_MD_FLXATTR ? "set" : "remove", xattr_name);
388 rc = mdt_init_ucred_reint(info);
392 if (valid & OBD_MD_FLRMTRSETFACL) {
393 if (unlikely(!remote))
394 GOTO(out, rc = err_serious(-EINVAL));
396 perm = mdt_identity_get_perm(uc->uc_identity, remote,
398 if (!(perm & CFS_RMTACL_PERM))
399 GOTO(out, rc = err_serious(-EPERM));
402 if (strncmp(xattr_name, XATTR_USER_PREFIX,
403 sizeof(XATTR_USER_PREFIX) - 1) == 0) {
404 if (!(exp_connect_flags(req->rq_export) & OBD_CONNECT_XATTR))
405 GOTO(out, rc = -EOPNOTSUPP);
406 } else if (strncmp(xattr_name, XATTR_TRUSTED_PREFIX,
407 sizeof(XATTR_TRUSTED_PREFIX) - 1) == 0) {
409 if (!md_capable(mdt_ucred(info), CFS_CAP_SYS_ADMIN))
410 GOTO(out, rc = -EPERM);
412 if (strcmp(xattr_name, XATTR_NAME_LOV) == 0 ||
413 strcmp(xattr_name, XATTR_NAME_LMA) == 0 ||
414 strcmp(xattr_name, XATTR_NAME_LMV) == 0 ||
415 strcmp(xattr_name, XATTR_NAME_LINK) == 0 ||
416 strcmp(xattr_name, XATTR_NAME_FID) == 0 ||
417 strcmp(xattr_name, XATTR_NAME_VERSION) == 0 ||
418 strcmp(xattr_name, XATTR_NAME_SOM) == 0 ||
419 strcmp(xattr_name, XATTR_NAME_HSM) == 0 ||
420 strcmp(xattr_name, XATTR_NAME_LFSCK_NAMESPACE) == 0)
422 } else if ((valid & OBD_MD_FLXATTR) &&
423 (strcmp(xattr_name, XATTR_NAME_ACL_ACCESS) == 0 ||
424 strcmp(xattr_name, XATTR_NAME_ACL_DEFAULT) == 0)) {
425 /* currently lustre limit acl access size */
426 if (xattr_len > LUSTRE_POSIX_ACL_MAX_SIZE)
427 GOTO(out, rc = -ERANGE);
430 lockpart = MDS_INODELOCK_UPDATE;
431 /* Revoke all clients' lookup lock, since the access
432 * permissions for this inode is changed when ACL_ACCESS is
433 * set. This isn't needed for ACL_DEFAULT, since that does
434 * not change the access permissions of this inode, nor any
435 * other existing inodes. It is setting the ACLs inherited
436 * by new directories/files at create time. */
437 /* We need revoke both LOOKUP|PERM lock here, see mdt_attr_set. */
438 if (!strcmp(xattr_name, XATTR_NAME_ACL_ACCESS))
439 lockpart |= MDS_INODELOCK_PERM | MDS_INODELOCK_LOOKUP;
440 /* We need to take the lock on behalf of old clients so that newer
441 * clients flush their xattr caches */
443 lockpart |= MDS_INODELOCK_XATTR;
445 lh = &info->mti_lh[MDT_LH_PARENT];
446 /* ACLs were sent to clients under LCK_CR locks, so taking LCK_EX
448 mdt_lock_reg_init(lh, LCK_EX);
449 obj = mdt_object_find_lock(info, rr->rr_fid1, lh, lockpart);
451 GOTO(out, rc = PTR_ERR(obj));
453 tgt_vbr_obj_set(env, mdt_obj2dt(obj));
454 rc = mdt_version_get_check_save(info, obj, 0);
456 GOTO(out_unlock, rc);
458 if (unlikely(!(valid & OBD_MD_FLCTIME))) {
459 /* This isn't strictly an error, but all current clients
460 * should set OBD_MD_FLCTIME when setting attributes. */
461 CWARN("%s: client miss to set OBD_MD_FLCTIME when "
462 "setxattr %s: [object "DFID"] [valid "LPU64"]\n",
463 mdt_obd_name(info->mti_mdt), xattr_name,
464 PFID(rr->rr_fid1), valid);
465 attr->la_ctime = cfs_time_current_sec();
467 attr->la_valid = LA_CTIME;
468 child = mdt_object_child(obj);
469 if (valid & OBD_MD_FLXATTR) {
470 char *xattr = (void *)rr->rr_eadata;
475 if (valid & OBD_MD_FLRMTLSETFACL) {
476 if (unlikely(!remote))
477 GOTO(out_unlock, rc = -EINVAL);
479 xattr_len = mdt_rmtlsetfacl(info, child,
481 (ext_acl_xattr_header *)xattr,
484 GOTO(out_unlock, rc = xattr_len);
486 xattr = (char *)new_xattr;
489 if (attr->la_flags & XATTR_REPLACE)
490 flags |= LU_XATTR_REPLACE;
492 if (attr->la_flags & XATTR_CREATE)
493 flags |= LU_XATTR_CREATE;
495 mdt_fail_write(env, info->mti_mdt->mdt_bottom,
496 OBD_FAIL_MDS_SETXATTR_WRITE);
499 buf->lb_len = xattr_len;
500 rc = mo_xattr_set(env, child, buf, xattr_name, flags);
501 /* update ctime after xattr changed */
503 ma->ma_attr_flags |= MDS_PERM_BYPASS;
504 mo_attr_set(env, child, ma);
507 } else if (valid & OBD_MD_FLXATTRRM) {
508 rc = mo_xattr_del(env, child, xattr_name);
509 /* update ctime after xattr changed */
511 ma->ma_attr_flags |= MDS_PERM_BYPASS;
512 mo_attr_set(env, child, ma);
515 CDEBUG(D_INFO, "valid bits: "LPX64"\n", valid);
519 mdt_counter_incr(req, LPROC_MDT_SETXATTR);
523 mdt_object_unlock_put(info, obj, lh, rc);
524 if (unlikely(new_xattr != NULL))
525 lustre_posix_acl_xattr_free(new_xattr, xattr_len);
527 mdt_exit_ucred(info);