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 [sun.com URL with a
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 2008 Sun Microsystems, Inc. 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 /* prerequisite for linux/xattr.h */
52 #include <linux/types.h>
53 /* prerequisite for linux/xattr.h */
55 /* XATTR_{REPLACE,CREATE} */
56 #include <linux/xattr.h>
58 #include "mdt_internal.h"
61 /* return EADATA length to the caller. negative value means error */
62 static int mdt_getxattr_pack_reply(struct mdt_thread_info * info)
64 struct req_capsule *pill = info->mti_pill ;
65 struct ptlrpc_request *req = mdt_info_req(info);
67 __u64 valid = info->mti_body->valid;
68 static const char user_string[] = "user.";
72 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_GETXATTR_PACK))
75 /* Determine how many bytes we need */
76 if (valid & OBD_MD_FLXATTR) {
77 xattr_name = req_capsule_client_get(pill, &RMF_NAME);
81 if (!(req->rq_export->exp_connect_flags & OBD_CONNECT_XATTR) &&
82 !strncmp(xattr_name, user_string, sizeof(user_string) - 1))
85 size = mo_xattr_get(info->mti_env,
86 mdt_object_child(info->mti_object),
87 &LU_BUF_NULL, xattr_name);
88 } else if (valid & OBD_MD_FLXATTRLS) {
89 size = mo_xattr_list(info->mti_env,
90 mdt_object_child(info->mti_object),
93 CDEBUG(D_INFO, "Valid bits: "LPX64"\n", info->mti_body->valid);
100 else if (size != -EOPNOTSUPP) {
101 CDEBUG(D_INFO, "Error geting EA size: %d\n", size);
106 if (info->mti_body->eadatasize != 0 &&
107 info->mti_body->eadatasize < size)
110 req_capsule_set_size(pill, &RMF_EADATA, RCL_SERVER,
111 min_t(int, size, info->mti_body->eadatasize));
113 rc = req_capsule_server_pack(pill);
122 int mdt_getxattr(struct mdt_thread_info *info)
124 struct ptlrpc_request *req = mdt_info_req(info);
125 struct mdt_export_data *med = mdt_req2med(req);
126 struct md_ucred *uc = mdt_ucred(info);
127 struct mdt_body *reqbody;
128 struct mdt_body *repbody = NULL;
129 struct md_object *next;
134 LASSERT(info->mti_object != NULL);
135 LASSERT(lu_object_assert_exists(&info->mti_object->mot_obj.mo_lu));
137 CDEBUG(D_INODE, "getxattr "DFID"\n", PFID(&info->mti_body->fid1));
139 reqbody = req_capsule_client_get(info->mti_pill, &RMF_MDT_BODY);
141 RETURN(err_serious(-EFAULT));
143 rc = mdt_init_ucred(info, reqbody);
145 RETURN(err_serious(rc));
147 next = mdt_object_child(info->mti_object);
149 if (info->mti_body->valid & OBD_MD_FLRMTRGETFACL) {
150 __u32 perm = mdt_identity_get_perm(uc->mu_identity,
154 LASSERT(med->med_rmtclient);
155 if (!(perm & CFS_RMTACL_PERM))
156 GOTO(out, rc = err_serious(-EPERM));
158 rc = mo_permission(info->mti_env, NULL, next, NULL,
161 GOTO(out, rc = err_serious(rc));
164 easize = mdt_getxattr_pack_reply(info);
166 GOTO(out, rc = err_serious(easize));
168 repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
169 LASSERT(repbody != NULL);
171 /* No need further getxattr. */
172 if (easize == 0 || reqbody->eadatasize == 0)
173 GOTO(out, rc = easize);
175 buf = &info->mti_buf;
176 buf->lb_buf = req_capsule_server_get(info->mti_pill, &RMF_EADATA);
177 buf->lb_len = easize;
179 if (info->mti_body->valid & OBD_MD_FLXATTR) {
180 int flags = CFS_IC_NOTHING;
181 char *xattr_name = req_capsule_client_get(info->mti_pill,
183 CDEBUG(D_INODE, "getxattr %s\n", xattr_name);
185 rc = mo_xattr_get(info->mti_env, next, buf, xattr_name);
187 CERROR("getxattr failed: %d\n", rc);
191 if (info->mti_body->valid &
192 (OBD_MD_FLRMTLSETFACL | OBD_MD_FLRMTLGETFACL))
194 else if (info->mti_body->valid & OBD_MD_FLRMTRGETFACL)
195 flags = CFS_IC_MAPPED;
197 if (rc > 0 && flags != CFS_IC_NOTHING) {
200 LASSERT(med->med_rmtclient);
201 rc1 = lustre_posix_acl_xattr_id2client(uc,
203 (posix_acl_xattr_header *)(buf->lb_buf),
205 if (unlikely(rc1 < 0))
208 } else if (info->mti_body->valid & OBD_MD_FLXATTRLS) {
209 CDEBUG(D_INODE, "listxattr\n");
211 rc = mo_xattr_list(info->mti_env, next, buf);
213 CDEBUG(D_INFO, "listxattr failed: %d\n", rc);
220 repbody->eadatasize = rc;
223 mdt_exit_ucred(info);
227 static int mdt_rmtlsetfacl(struct mdt_thread_info *info,
228 struct md_object *next,
229 const char *xattr_name,
230 ext_acl_xattr_header *header,
231 posix_acl_xattr_header **out)
233 struct ptlrpc_request *req = mdt_info_req(info);
234 struct mdt_export_data *med = mdt_req2med(req);
235 struct md_ucred *uc = mdt_ucred(info);
236 struct lu_buf *buf = &info->mti_buf;
240 rc = lustre_ext_acl_xattr_id2server(uc, med->med_idmap, header);
244 rc = mo_xattr_get(info->mti_env, next, &LU_BUF_NULL, xattr_name);
251 if (buf->lb_len > 0) {
252 OBD_ALLOC(buf->lb_buf, buf->lb_len);
253 if (unlikely(buf->lb_buf == NULL))
256 rc = mo_xattr_get(info->mti_env, next, buf, xattr_name);
258 CERROR("getxattr failed: %d\n", rc);
264 rc = lustre_acl_xattr_merge2posix((posix_acl_xattr_header *)(buf->lb_buf),
265 buf->lb_len, header, out);
269 if (rc <= 0 && buf->lb_buf != NULL)
270 OBD_FREE(buf->lb_buf, buf->lb_len);
274 int mdt_reint_setxattr(struct mdt_thread_info *info,
275 struct mdt_lock_handle *unused)
277 struct ptlrpc_request *req = mdt_info_req(info);
278 struct mdt_export_data *med = mdt_req2med(req);
279 struct md_ucred *uc = mdt_ucred(info);
280 const char user_string[] = "user.";
281 const char trust_string[] = "trusted.";
282 struct mdt_lock_handle *lh;
283 struct req_capsule *pill = info->mti_pill;
284 const struct lu_env *env = info->mti_env;
285 struct lu_buf *buf = &info->mti_buf;
286 struct mdt_reint_record *rr = &info->mti_rr;
287 struct md_attr *ma = &info->mti_attr;
288 struct lu_attr *attr = &info->mti_attr.ma_attr;
289 struct mdt_object *obj;
290 struct md_object *child;
291 __u64 valid = attr->la_valid;
292 const char *xattr_name;
296 posix_acl_xattr_header *new_xattr = NULL;
299 CDEBUG(D_INODE, "setxattr for "DFID"\n", PFID(rr->rr_fid1));
301 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_SETXATTR))
302 RETURN(err_serious(-ENOMEM));
304 xattr_name = rr->rr_name;
306 CDEBUG(D_INODE, "%s xattr %s\n",
307 valid & OBD_MD_FLXATTR ? "set" : "remove", xattr_name);
309 rc = mdt_init_ucred_reint(info);
313 if (valid & OBD_MD_FLRMTRSETFACL) {
314 __u32 perm = mdt_identity_get_perm(uc->mu_identity,
318 LASSERT(med->med_rmtclient);
319 if (!(perm & CFS_RMTACL_PERM))
320 GOTO(out, rc = err_serious(-EPERM));
323 /* various sanity check for xattr name */
324 xattr_name = req_capsule_client_get(pill, &RMF_NAME);
326 GOTO(out, rc = err_serious(-EFAULT));
328 if (strncmp(xattr_name, trust_string, sizeof(trust_string) - 1) == 0) {
329 if (strcmp(xattr_name + 8, XATTR_NAME_LOV) == 0)
330 GOTO(out, rc = -EACCES);
333 if (!(req->rq_export->exp_connect_flags & OBD_CONNECT_XATTR) &&
334 (strncmp(xattr_name, user_string, sizeof(user_string) - 1) == 0)) {
335 GOTO(out, rc = -EOPNOTSUPP);
338 lockpart = MDS_INODELOCK_UPDATE;
339 if (!strcmp(xattr_name, XATTR_NAME_ACL_ACCESS))
340 lockpart |= MDS_INODELOCK_LOOKUP;
342 lh = &info->mti_lh[MDT_LH_PARENT];
343 mdt_lock_reg_init(lh, LCK_PW);
344 obj = mdt_object_find_lock(info, rr->rr_fid1, lh, lockpart);
346 GOTO(out, rc = PTR_ERR(obj));
348 if (unlikely(!(valid & OBD_MD_FLCTIME))) {
349 CWARN("client miss to set OBD_MD_FLCTIME when "
350 "setxattr: [object "DFID"] [valid %llu]\n",
351 PFID(rr->rr_fid1), valid);
352 attr->la_ctime = cfs_time_current_sec();
354 attr->la_valid = LA_CTIME;
355 child = mdt_object_child(obj);
356 if (valid & OBD_MD_FLXATTR) {
359 if (!req_capsule_field_present(pill, &RMF_EADATA, RCL_CLIENT)) {
360 CDEBUG(D_INFO, "no xattr data supplied\n");
361 GOTO(out_unlock, rc = -EFAULT);
364 xattr_len = req_capsule_get_size(pill, &RMF_EADATA, RCL_CLIENT);
368 xattr = req_capsule_client_get(pill, &RMF_EADATA);
370 if (valid & OBD_MD_FLRMTLSETFACL) {
371 LASSERT(med->med_rmtclient);
372 xattr_len = mdt_rmtlsetfacl(info, child,
374 (ext_acl_xattr_header *)xattr,
377 GOTO(out_unlock, rc = xattr_len);
379 xattr = (char *)new_xattr;
382 if (attr->la_flags & XATTR_REPLACE)
383 flags |= LU_XATTR_REPLACE;
385 if (attr->la_flags & XATTR_CREATE)
386 flags |= LU_XATTR_CREATE;
388 mdt_fail_write(env, info->mti_mdt->mdt_bottom,
389 OBD_FAIL_MDS_SETXATTR_WRITE);
392 buf->lb_len = xattr_len;
393 rc = mo_xattr_set(env, child, buf, xattr_name, flags);
394 /* update ctime after xattr changed */
396 ma->ma_attr_flags |= MDS_PERM_BYPASS;
397 mo_attr_set(env, child, ma);
400 } else if (valid & OBD_MD_FLXATTRRM) {
401 rc = mo_xattr_del(env, child, xattr_name);
402 /* update ctime after xattr changed */
404 ma->ma_attr_flags |= MDS_PERM_BYPASS;
405 mo_attr_set(env, child, ma);
408 CDEBUG(D_INFO, "valid bits: "LPX64"\n", valid);
413 mdt_object_unlock_put(info, obj, lh, rc);
414 if (unlikely(new_xattr != NULL))
415 lustre_posix_acl_xattr_free(new_xattr, xattr_len);
417 mdt_exit_ucred(info);