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.
38 #include <linux/sched.h>
40 #include <linux/selinux.h>
42 #define DEBUG_SUBSYSTEM S_LLITE
44 #include <obd_support.h>
45 #include <lustre_lite.h>
46 #include <lustre_dlm.h>
47 #include <lustre_ver.h>
48 #include <lustre_eacl.h>
50 #include "llite_internal.h"
52 #define XATTR_USER_T (1)
53 #define XATTR_TRUSTED_T (2)
54 #define XATTR_SECURITY_T (3)
55 #define XATTR_ACL_ACCESS_T (4)
56 #define XATTR_ACL_DEFAULT_T (5)
57 #define XATTR_LUSTRE_T (6)
58 #define XATTR_OTHER_T (7)
61 int get_xattr_type(const char *name)
63 if (!strcmp(name, POSIX_ACL_XATTR_ACCESS))
64 return XATTR_ACL_ACCESS_T;
66 if (!strcmp(name, POSIX_ACL_XATTR_DEFAULT))
67 return XATTR_ACL_DEFAULT_T;
69 if (!strncmp(name, XATTR_USER_PREFIX,
70 sizeof(XATTR_USER_PREFIX) - 1))
73 if (!strncmp(name, XATTR_TRUSTED_PREFIX,
74 sizeof(XATTR_TRUSTED_PREFIX) - 1))
75 return XATTR_TRUSTED_T;
77 if (!strncmp(name, XATTR_SECURITY_PREFIX,
78 sizeof(XATTR_SECURITY_PREFIX) - 1))
79 return XATTR_SECURITY_T;
81 if (!strncmp(name, XATTR_LUSTRE_PREFIX,
82 sizeof(XATTR_LUSTRE_PREFIX) - 1))
83 return XATTR_LUSTRE_T;
89 int xattr_type_filter(struct ll_sb_info *sbi, int xattr_type)
91 if ((xattr_type == XATTR_ACL_ACCESS_T ||
92 xattr_type == XATTR_ACL_DEFAULT_T) &&
93 !(sbi->ll_flags & LL_SBI_ACL))
96 if (xattr_type == XATTR_USER_T && !(sbi->ll_flags & LL_SBI_USER_XATTR))
98 if (xattr_type == XATTR_TRUSTED_T && !cfs_capable(CFS_CAP_SYS_ADMIN))
100 if (xattr_type == XATTR_OTHER_T)
107 int ll_setxattr_common(struct inode *inode, const char *name,
108 const void *value, size_t size,
109 int flags, __u64 valid)
111 struct ll_sb_info *sbi = ll_i2sbi(inode);
112 struct ptlrpc_request *req = NULL;
115 posix_acl_xattr_header *new_value = NULL;
116 struct rmtacl_ctl_entry *rce = NULL;
117 ext_acl_xattr_header *acl = NULL;
118 const char *pv = value;
121 xattr_type = get_xattr_type(name);
122 rc = xattr_type_filter(sbi, xattr_type);
126 /* b10667: ignore lustre special xattr for now */
127 if ((xattr_type == XATTR_TRUSTED_T && strcmp(name, "trusted.lov") == 0) ||
128 (xattr_type == XATTR_LUSTRE_T && strcmp(name, "lustre.lov") == 0))
131 /* b15587: ignore security.capability xattr for now */
132 if ((xattr_type == XATTR_SECURITY_T &&
133 strcmp(name, "security.capability") == 0))
136 /* LU-549: Disable security.selinux when selinux is disabled */
137 if (xattr_type == XATTR_SECURITY_T && !selinux_is_enabled() &&
138 strcmp(name, "security.selinux") == 0)
141 #ifdef CONFIG_FS_POSIX_ACL
142 if (sbi->ll_flags & LL_SBI_RMT_CLIENT &&
143 (xattr_type == XATTR_ACL_ACCESS_T ||
144 xattr_type == XATTR_ACL_DEFAULT_T)) {
145 rce = rct_search(&sbi->ll_rct, cfs_curproc_pid());
147 (rce->rce_ops != RMT_LSETFACL &&
148 rce->rce_ops != RMT_RSETFACL))
151 if (rce->rce_ops == RMT_LSETFACL) {
152 struct eacl_entry *ee;
154 ee = et_search_del(&sbi->ll_et, cfs_curproc_pid(),
155 ll_inode2fid(inode), xattr_type);
157 if (valid & OBD_MD_FLXATTR) {
158 acl = lustre_acl_xattr_merge2ext(
159 (posix_acl_xattr_header *)value,
163 RETURN(PTR_ERR(acl));
165 size = CFS_ACL_XATTR_SIZE(\
166 le32_to_cpu(acl->a_count), \
168 pv = (const char *)acl;
171 } else if (rce->rce_ops == RMT_RSETFACL) {
172 int acl_size = lustre_posix_acl_xattr_filter(
173 (posix_acl_xattr_header *)value,
175 if (unlikely(acl_size < 0))
179 pv = (const char *)new_value;
183 valid |= rce_ops2valid(rce->rce_ops);
186 if (sbi->ll_xattr_cache_enabled &&
187 (rce == NULL || rce->rce_ops == RMT_LSETFACL)) {
188 rc = ll_xattr_cache_update(inode, name, pv, size, valid, flags);
190 oc = ll_mdscapa_get(inode);
191 rc = md_setxattr(sbi->ll_md_exp, ll_inode2fid(inode), oc,
192 valid, name, pv, size, 0, flags,
193 ll_i2suppgid(inode), &req);
197 #ifdef CONFIG_FS_POSIX_ACL
198 if (new_value != NULL)
199 lustre_posix_acl_xattr_free(new_value, size);
201 lustre_ext_acl_xattr_free(acl);
204 if (rc == -EOPNOTSUPP && xattr_type == XATTR_USER_T) {
205 LCONSOLE_INFO("Disabling user_xattr feature because "
206 "it is not supported on the server\n");
207 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
212 ptlrpc_req_finished(req);
216 int ll_setxattr(struct dentry *dentry, const char *name,
217 const void *value, size_t size, int flags)
219 struct inode *inode = dentry->d_inode;
224 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), xattr %s\n",
225 inode->i_ino, inode->i_generation, inode, name);
227 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_SETXATTR, 1);
229 if ((strncmp(name, XATTR_TRUSTED_PREFIX,
230 sizeof(XATTR_TRUSTED_PREFIX) - 1) == 0 &&
231 strcmp(name + sizeof(XATTR_TRUSTED_PREFIX) - 1, "lov") == 0) ||
232 (strncmp(name, XATTR_LUSTRE_PREFIX,
233 sizeof(XATTR_LUSTRE_PREFIX) - 1) == 0 &&
234 strcmp(name + sizeof(XATTR_LUSTRE_PREFIX) - 1, "lov") == 0)) {
235 struct lov_user_md *lump = (struct lov_user_md *)value;
238 /* Attributes that are saved via getxattr will always have
239 * the stripe_offset as 0. Instead, the MDS should be
240 * allowed to pick the starting OST index. b=17846 */
241 if (lump != NULL && lump->lmm_stripe_offset == 0)
242 lump->lmm_stripe_offset = -1;
244 if (lump != NULL && S_ISREG(inode->i_mode)) {
246 __u64 it_flags = FMODE_WRITE;
247 int lum_size = (lump->lmm_magic == LOV_USER_MAGIC_V1) ?
248 sizeof(*lump) : sizeof(struct lov_user_md_v3);
251 rc = ll_lov_setstripe_ea_info(inode, &f, it_flags, lump,
253 /* b10667: rc always be 0 here for now */
255 } else if (S_ISDIR(inode->i_mode)) {
256 rc = ll_dir_setstripe(inode, lump, 0);
261 } else if (strcmp(name, XATTR_NAME_LMA) == 0 ||
262 strcmp(name, XATTR_NAME_LINK) == 0)
265 return ll_setxattr_common(inode, name, value, size, flags,
269 int ll_removexattr(struct dentry *dentry, const char *name)
271 struct inode *inode = dentry->d_inode;
276 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), xattr %s\n",
277 inode->i_ino, inode->i_generation, inode, name);
279 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_REMOVEXATTR, 1);
280 return ll_setxattr_common(inode, name, NULL, 0, 0,
285 int ll_getxattr_common(struct inode *inode, const char *name,
286 void *buffer, size_t size, __u64 valid)
288 struct ll_sb_info *sbi = ll_i2sbi(inode);
289 struct ptlrpc_request *req = NULL;
290 struct mdt_body *body;
294 struct rmtacl_ctl_entry *rce = NULL;
297 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n",
298 inode->i_ino, inode->i_generation, inode);
300 /* listxattr have slightly different behavior from of ext3:
301 * without 'user_xattr' ext3 will list all xattr names but
302 * filtered out "^user..*"; we list them all for simplicity.
305 xattr_type = XATTR_OTHER_T;
309 xattr_type = get_xattr_type(name);
310 rc = xattr_type_filter(sbi, xattr_type);
314 /* b15587: ignore security.capability xattr for now */
315 if ((xattr_type == XATTR_SECURITY_T &&
316 strcmp(name, "security.capability") == 0))
319 /* LU-549: Disable security.selinux when selinux is disabled */
320 if (xattr_type == XATTR_SECURITY_T && !selinux_is_enabled() &&
321 strcmp(name, "security.selinux") == 0)
324 #ifdef CONFIG_FS_POSIX_ACL
325 if (sbi->ll_flags & LL_SBI_RMT_CLIENT &&
326 (xattr_type == XATTR_ACL_ACCESS_T ||
327 xattr_type == XATTR_ACL_DEFAULT_T)) {
328 rce = rct_search(&sbi->ll_rct, cfs_curproc_pid());
330 (rce->rce_ops != RMT_LSETFACL &&
331 rce->rce_ops != RMT_LGETFACL &&
332 rce->rce_ops != RMT_RSETFACL &&
333 rce->rce_ops != RMT_RGETFACL))
337 /* posix acl is under protection of LOOKUP lock. when calling to this,
338 * we just have path resolution to the target inode, so we have great
339 * chance that cached ACL is uptodate.
341 if (xattr_type == XATTR_ACL_ACCESS_T &&
342 !(sbi->ll_flags & LL_SBI_RMT_CLIENT)) {
343 struct ll_inode_info *lli = ll_i2info(inode);
344 struct posix_acl *acl;
346 spin_lock(&lli->lli_lock);
347 acl = posix_acl_dup(lli->lli_posix_acl);
348 spin_unlock(&lli->lli_lock);
353 rc = posix_acl_to_xattr(&init_user_ns, acl, buffer, size);
354 posix_acl_release(acl);
357 if (xattr_type == XATTR_ACL_DEFAULT_T && !S_ISDIR(inode->i_mode))
362 if (sbi->ll_xattr_cache_enabled && (rce == NULL ||
363 rce->rce_ops == RMT_LGETFACL ||
364 rce->rce_ops == RMT_LSETFACL)) {
365 rc = ll_xattr_cache_get(inode, name, buffer, size, valid);
369 oc = ll_mdscapa_get(inode);
370 rc = md_getxattr(sbi->ll_md_exp, ll_inode2fid(inode), oc,
371 valid | (rce ? rce_ops2valid(rce->rce_ops) : 0),
372 name, NULL, 0, size, 0, &req);
378 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
381 /* only detect the xattr size */
383 GOTO(out, rc = body->eadatasize);
385 if (size < body->eadatasize) {
386 CERROR("server bug: replied size %u > %u\n",
387 body->eadatasize, (int)size);
388 GOTO(out, rc = -ERANGE);
391 if (body->eadatasize == 0)
392 GOTO(out, rc = -ENODATA);
394 /* do not need swab xattr data */
395 xdata = req_capsule_server_sized_get(&req->rq_pill, &RMF_EADATA,
398 GOTO(out, rc = -EFAULT);
400 memcpy(buffer, xdata, body->eadatasize);
401 rc = body->eadatasize;
404 #ifdef CONFIG_FS_POSIX_ACL
405 if (rce && rce->rce_ops == RMT_LSETFACL) {
406 ext_acl_xattr_header *acl;
408 acl = lustre_posix_acl_xattr_2ext((posix_acl_xattr_header *)buffer,
411 GOTO(out, rc = PTR_ERR(acl));
413 rc = ee_add(&sbi->ll_et, cfs_curproc_pid(), ll_inode2fid(inode),
415 if (unlikely(rc < 0)) {
416 lustre_ext_acl_xattr_free(acl);
424 if (rc == -EOPNOTSUPP && xattr_type == XATTR_USER_T) {
425 LCONSOLE_INFO("%s: disabling user_xattr feature because "
426 "it is not supported on the server: rc = %d\n",
427 ll_get_fsname(inode->i_sb, NULL, 0), rc);
428 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
431 ptlrpc_req_finished(req);
435 ssize_t ll_getxattr(struct dentry *dentry, const char *name,
436 void *buffer, size_t size)
438 struct inode *inode = dentry->d_inode;
443 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), xattr %s\n",
444 inode->i_ino, inode->i_generation, inode, name);
446 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_GETXATTR, 1);
448 if ((strncmp(name, XATTR_TRUSTED_PREFIX,
449 sizeof(XATTR_TRUSTED_PREFIX) - 1) == 0 &&
450 strcmp(name + sizeof(XATTR_TRUSTED_PREFIX) - 1, "lov") == 0) ||
451 (strncmp(name, XATTR_LUSTRE_PREFIX,
452 sizeof(XATTR_LUSTRE_PREFIX) - 1) == 0 &&
453 strcmp(name + sizeof(XATTR_LUSTRE_PREFIX) - 1, "lov") == 0)) {
454 struct lov_stripe_md *lsm;
455 struct lov_user_md *lump;
456 struct lov_mds_md *lmm = NULL;
457 struct ptlrpc_request *request = NULL;
458 int rc = 0, lmmsize = 0;
460 if (!S_ISREG(inode->i_mode) && !S_ISDIR(inode->i_mode))
463 if (size == 0 && S_ISDIR(inode->i_mode)) {
464 /* XXX directory EA is fix for now, optimize to save
466 GOTO(out, rc = sizeof(struct lov_user_md));
469 lsm = ccc_inode_lsm_get(inode);
471 if (S_ISDIR(inode->i_mode)) {
472 rc = ll_dir_getstripe(inode, &lmm,
478 /* LSM is present already after lookup/getattr call.
479 * we need to grab layout lock once it is implemented */
480 rc = obd_packmd(ll_i2dtexp(inode), &lmm, lsm);
483 ccc_inode_lsm_put(inode, lsm);
489 /* used to call ll_get_max_mdsize() forward to get
490 * the maximum buffer size, while some apps (such as
491 * rsync 3.0.x) care much about the exact xattr value
497 if (size < lmmsize) {
498 CERROR("server bug: replied size %d > %d for %s (%s)\n",
499 lmmsize, (int)size, dentry->d_name.name, name);
500 GOTO(out, rc = -ERANGE);
503 lump = (struct lov_user_md *)buffer;
504 memcpy(lump, lmm, lmmsize);
505 /* do not return layout gen for getxattr otherwise it would
506 * confuse tar --xattr by recognizing layout gen as stripe
507 * offset when the file is restored. See LU-2809. */
508 lump->lmm_layout_gen = 0;
513 ptlrpc_req_finished(request);
515 obd_free_diskmd(ll_i2dtexp(inode), &lmm);
519 return ll_getxattr_common(inode, name, buffer, size, OBD_MD_FLXATTR);
522 ssize_t ll_listxattr(struct dentry *dentry, char *buffer, size_t size)
524 struct inode *inode = dentry->d_inode;
526 struct lov_mds_md *lmm = NULL;
527 struct ptlrpc_request *request = NULL;
532 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n",
533 inode->i_ino, inode->i_generation, inode);
535 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_LISTXATTR, 1);
537 rc = ll_getxattr_common(inode, NULL, buffer, size, OBD_MD_FLXATTRLS);
541 if (buffer != NULL) {
542 struct ll_sb_info *sbi = ll_i2sbi(inode);
543 char *xattr_name = buffer;
547 xlen = strnlen(xattr_name, rem - 1) + 1;
549 if (xattr_type_filter(sbi,
550 get_xattr_type(xattr_name)) == 0) {
551 /* skip OK xattr type
557 /* move up remaining xattrs in buffer
558 * removing the xattr that is not OK
560 memmove(xattr_name, xattr_name + xlen, rem);
564 if (S_ISREG(inode->i_mode)) {
565 if (!ll_i2info(inode)->lli_has_smd)
567 } else if (S_ISDIR(inode->i_mode)) {
568 rc2 = ll_dir_getstripe(inode, &lmm, &lmmsize, &request);
573 } else if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)) {
574 const int prefix_len = sizeof(XATTR_LUSTRE_PREFIX) - 1;
575 const size_t name_len = sizeof("lov") - 1;
576 const size_t total_len = prefix_len + name_len + 1;
578 if (((rc + total_len) > size) && (buffer != NULL)) {
579 ptlrpc_req_finished(request);
583 if (buffer != NULL) {
585 memcpy(buffer, XATTR_LUSTRE_PREFIX, prefix_len);
586 memcpy(buffer + prefix_len, "lov", name_len);
587 buffer[prefix_len + name_len] = '\0';
592 ptlrpc_req_finished(request);