1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
30 * Use is subject to license terms.
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>
47 # define EXPORT_SYMTAB
49 #define DEBUG_SUBSYSTEM S_MDS
51 #include <lustre_acl.h>
52 #include "mdt_internal.h"
55 /* return EADATA length to the caller. negative value means error */
56 static int mdt_getxattr_pack_reply(struct mdt_thread_info * info)
58 struct req_capsule *pill = info->mti_pill ;
59 struct ptlrpc_request *req = mdt_info_req(info);
61 __u64 valid = info->mti_body->valid;
62 static const char user_string[] = "user.";
66 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_GETXATTR_PACK))
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 (!(req->rq_export->exp_connect_flags & 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),
87 CDEBUG(D_INFO, "Valid bits: "LPX64"\n", info->mti_body->valid);
94 else if (size != -EOPNOTSUPP) {
95 CDEBUG(D_INFO, "Error geting EA size: %d\n", size);
100 if (info->mti_body->eadatasize != 0 &&
101 info->mti_body->eadatasize < size)
104 req_capsule_set_size(pill, &RMF_EADATA, RCL_SERVER,
105 min_t(int, size, info->mti_body->eadatasize));
107 rc = req_capsule_server_pack(pill);
116 int mdt_getxattr(struct mdt_thread_info *info)
118 struct ptlrpc_request *req = mdt_info_req(info);
119 struct mdt_export_data *med = mdt_req2med(req);
120 struct md_ucred *uc = mdt_ucred(info);
121 struct mdt_body *reqbody;
122 struct mdt_body *repbody = NULL;
123 struct md_object *next;
125 __u32 remote = exp_connect_rmtclient(info->mti_exp);
130 LASSERT(info->mti_object != NULL);
131 LASSERT(lu_object_assert_exists(&info->mti_object->mot_obj.mo_lu));
133 CDEBUG(D_INODE, "getxattr "DFID"\n", PFID(&info->mti_body->fid1));
135 reqbody = req_capsule_client_get(info->mti_pill, &RMF_MDT_BODY);
137 RETURN(err_serious(-EFAULT));
139 rc = mdt_init_ucred(info, reqbody);
141 RETURN(err_serious(rc));
143 next = mdt_object_child(info->mti_object);
145 if (info->mti_body->valid & OBD_MD_FLRMTRGETFACL) {
146 if (unlikely(!remote))
147 GOTO(out, rc = err_serious(-EINVAL));
149 perm = mdt_identity_get_perm(uc->mu_identity, remote,
151 if (!(perm & CFS_RMTACL_PERM))
152 GOTO(out, rc = err_serious(-EPERM));
154 rc = mo_permission(info->mti_env, NULL, next, NULL,
157 GOTO(out, rc = err_serious(rc));
160 easize = mdt_getxattr_pack_reply(info);
162 GOTO(out, rc = err_serious(easize));
164 repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
165 LASSERT(repbody != NULL);
167 /* No need further getxattr. */
168 if (easize == 0 || reqbody->eadatasize == 0)
169 GOTO(out, rc = easize);
171 buf = &info->mti_buf;
172 buf->lb_buf = req_capsule_server_get(info->mti_pill, &RMF_EADATA);
173 buf->lb_len = easize;
175 if (info->mti_body->valid & OBD_MD_FLXATTR) {
176 int flags = CFS_IC_NOTHING;
177 char *xattr_name = req_capsule_client_get(info->mti_pill,
179 CDEBUG(D_INODE, "getxattr %s\n", xattr_name);
181 rc = mo_xattr_get(info->mti_env, next, buf, xattr_name);
183 CERROR("getxattr failed: %d\n", rc);
187 if (info->mti_body->valid &
188 (OBD_MD_FLRMTLSETFACL | OBD_MD_FLRMTLGETFACL))
190 else if (info->mti_body->valid & OBD_MD_FLRMTRGETFACL)
191 flags = CFS_IC_MAPPED;
193 if (rc > 0 && flags != CFS_IC_NOTHING) {
196 if (unlikely(!remote))
197 GOTO(out, rc = -EINVAL);
199 rc1 = lustre_posix_acl_xattr_id2client(uc,
201 (posix_acl_xattr_header *)(buf->lb_buf),
203 if (unlikely(rc1 < 0))
206 } else if (info->mti_body->valid & OBD_MD_FLXATTRLS) {
207 CDEBUG(D_INODE, "listxattr\n");
209 rc = mo_xattr_list(info->mti_env, next, buf);
211 CDEBUG(D_INFO, "listxattr failed: %d\n", rc);
218 mdt_counter_incr(req->rq_export, LPROC_MDT_GETXATTR);
219 repbody->eadatasize = rc;
222 mdt_exit_ucred(info);
226 static int mdt_rmtlsetfacl(struct mdt_thread_info *info,
227 struct md_object *next,
228 const char *xattr_name,
229 ext_acl_xattr_header *header,
230 posix_acl_xattr_header **out)
232 struct ptlrpc_request *req = mdt_info_req(info);
233 struct mdt_export_data *med = mdt_req2med(req);
234 struct md_ucred *uc = mdt_ucred(info);
235 struct lu_buf *buf = &info->mti_buf;
239 rc = lustre_ext_acl_xattr_id2server(uc, med->med_idmap, header);
243 rc = mo_xattr_get(info->mti_env, next, &LU_BUF_NULL, xattr_name);
250 if (buf->lb_len > 0) {
251 OBD_ALLOC_LARGE(buf->lb_buf, buf->lb_len);
252 if (unlikely(buf->lb_buf == NULL))
255 rc = mo_xattr_get(info->mti_env, next, buf, xattr_name);
257 CERROR("getxattr failed: %d\n", rc);
263 rc = lustre_acl_xattr_merge2posix((posix_acl_xattr_header *)(buf->lb_buf),
264 buf->lb_len, header, out);
268 if (rc <= 0 && buf->lb_buf != NULL)
269 OBD_FREE_LARGE(buf->lb_buf, buf->lb_len);
273 int mdt_reint_setxattr(struct mdt_thread_info *info,
274 struct mdt_lock_handle *unused)
276 struct ptlrpc_request *req = mdt_info_req(info);
277 struct md_ucred *uc = mdt_ucred(info);
278 struct mdt_lock_handle *lh;
279 struct req_capsule *pill = info->mti_pill;
280 const struct lu_env *env = info->mti_env;
281 struct lu_buf *buf = &info->mti_buf;
282 struct mdt_reint_record *rr = &info->mti_rr;
283 struct md_attr *ma = &info->mti_attr;
284 struct lu_attr *attr = &info->mti_attr.ma_attr;
285 struct mdt_object *obj;
286 struct md_object *child;
287 __u64 valid = attr->la_valid;
288 const char *xattr_name;
292 posix_acl_xattr_header *new_xattr = NULL;
293 __u32 remote = exp_connect_rmtclient(info->mti_exp);
297 CDEBUG(D_INODE, "setxattr for "DFID"\n", PFID(rr->rr_fid1));
299 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_SETXATTR))
300 RETURN(err_serious(-ENOMEM));
302 xattr_name = rr->rr_name;
304 CDEBUG(D_INODE, "%s xattr %s\n",
305 valid & OBD_MD_FLXATTR ? "set" : "remove", xattr_name);
307 rc = mdt_init_ucred_reint(info);
311 if (valid & OBD_MD_FLRMTRSETFACL) {
312 if (unlikely(!remote))
313 GOTO(out, rc = err_serious(-EINVAL));
315 perm = mdt_identity_get_perm(uc->mu_identity, remote,
317 if (!(perm & CFS_RMTACL_PERM))
318 GOTO(out, rc = err_serious(-EPERM));
321 /* various sanity check for xattr name */
322 xattr_name = req_capsule_client_get(pill, &RMF_NAME);
324 GOTO(out, rc = err_serious(-EFAULT));
326 if (strncmp(xattr_name, XATTR_USER_PREFIX,
327 sizeof(XATTR_USER_PREFIX) - 1) == 0) {
328 if (!(req->rq_export->exp_connect_flags & OBD_CONNECT_XATTR))
329 GOTO(out, rc = -EOPNOTSUPP);
330 if (strcmp(xattr_name, XATTR_NAME_LOV) == 0)
331 GOTO(out, rc = -EACCES);
332 if (strcmp(xattr_name, XATTR_NAME_LMA) == 0)
334 if (strcmp(xattr_name, XATTR_NAME_LINK) == 0)
336 } else if ((valid & OBD_MD_FLXATTR) &&
337 (strncmp(xattr_name, XATTR_NAME_ACL_ACCESS,
338 sizeof(XATTR_NAME_ACL_ACCESS) - 1) == 0)) {
339 /* currently lustre limit acl access size */
340 xattr_len = req_capsule_get_size(pill, &RMF_EADATA, RCL_CLIENT);
342 if (xattr_len > LUSTRE_POSIX_ACL_MAX_SIZE)
346 lockpart = MDS_INODELOCK_UPDATE;
347 if (!strcmp(xattr_name, XATTR_NAME_ACL_ACCESS))
348 lockpart |= MDS_INODELOCK_LOOKUP;
350 lh = &info->mti_lh[MDT_LH_PARENT];
351 mdt_lock_reg_init(lh, LCK_PW);
352 obj = mdt_object_find_lock(info, rr->rr_fid1, lh, lockpart);
354 GOTO(out, rc = PTR_ERR(obj));
357 rc = mdt_version_get_check_save(info, obj, 0);
359 GOTO(out_unlock, rc);
361 if (unlikely(!(valid & OBD_MD_FLCTIME))) {
362 CWARN("client miss to set OBD_MD_FLCTIME when "
363 "setxattr: [object "DFID"] [valid "LPU64"]\n",
364 PFID(rr->rr_fid1), valid);
365 attr->la_ctime = cfs_time_current_sec();
367 attr->la_valid = LA_CTIME;
368 child = mdt_object_child(obj);
369 if (valid & OBD_MD_FLXATTR) {
372 if (!req_capsule_field_present(pill, &RMF_EADATA, RCL_CLIENT)) {
373 CDEBUG(D_INFO, "no xattr data supplied\n");
374 GOTO(out_unlock, rc = -EFAULT);
377 xattr_len = req_capsule_get_size(pill, &RMF_EADATA, RCL_CLIENT);
381 xattr = req_capsule_client_get(pill, &RMF_EADATA);
383 if (valid & OBD_MD_FLRMTLSETFACL) {
384 if (unlikely(!remote))
385 GOTO(out_unlock, rc = -EINVAL);
387 xattr_len = mdt_rmtlsetfacl(info, child,
389 (ext_acl_xattr_header *)xattr,
392 GOTO(out_unlock, rc = xattr_len);
394 xattr = (char *)new_xattr;
397 if (attr->la_flags & XATTR_REPLACE)
398 flags |= LU_XATTR_REPLACE;
400 if (attr->la_flags & XATTR_CREATE)
401 flags |= LU_XATTR_CREATE;
403 mdt_fail_write(env, info->mti_mdt->mdt_bottom,
404 OBD_FAIL_MDS_SETXATTR_WRITE);
407 buf->lb_len = xattr_len;
408 rc = mo_xattr_set(env, child, buf, xattr_name, flags);
409 /* update ctime after xattr changed */
411 ma->ma_attr_flags |= MDS_PERM_BYPASS;
412 mo_attr_set(env, child, ma);
415 } else if (valid & OBD_MD_FLXATTRRM) {
416 rc = mo_xattr_del(env, child, xattr_name);
417 /* update ctime after xattr changed */
419 ma->ma_attr_flags |= MDS_PERM_BYPASS;
420 mo_attr_set(env, child, ma);
423 CDEBUG(D_INFO, "valid bits: "LPX64"\n", valid);
427 mdt_counter_incr(req->rq_export, LPROC_MDT_SETXATTR);
431 mdt_object_unlock_put(info, obj, lh, rc);
432 if (unlikely(new_xattr != NULL))
433 lustre_posix_acl_xattr_free(new_xattr, xattr_len);
435 mdt_exit_ucred(info);