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, 2014, 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_dlm.h>
46 #include <lustre_ver.h>
47 #include <lustre_eacl.h>
49 #include "llite_internal.h"
51 #define XATTR_USER_T (1)
52 #define XATTR_TRUSTED_T (2)
53 #define XATTR_SECURITY_T (3)
54 #define XATTR_ACL_ACCESS_T (4)
55 #define XATTR_ACL_DEFAULT_T (5)
56 #define XATTR_LUSTRE_T (6)
57 #define XATTR_OTHER_T (7)
60 int get_xattr_type(const char *name)
62 if (!strcmp(name, POSIX_ACL_XATTR_ACCESS))
63 return XATTR_ACL_ACCESS_T;
65 if (!strcmp(name, POSIX_ACL_XATTR_DEFAULT))
66 return XATTR_ACL_DEFAULT_T;
68 if (!strncmp(name, XATTR_USER_PREFIX,
69 sizeof(XATTR_USER_PREFIX) - 1))
72 if (!strncmp(name, XATTR_TRUSTED_PREFIX,
73 sizeof(XATTR_TRUSTED_PREFIX) - 1))
74 return XATTR_TRUSTED_T;
76 if (!strncmp(name, XATTR_SECURITY_PREFIX,
77 sizeof(XATTR_SECURITY_PREFIX) - 1))
78 return XATTR_SECURITY_T;
80 if (!strncmp(name, XATTR_LUSTRE_PREFIX,
81 sizeof(XATTR_LUSTRE_PREFIX) - 1))
82 return XATTR_LUSTRE_T;
88 int xattr_type_filter(struct ll_sb_info *sbi, int xattr_type)
90 if ((xattr_type == XATTR_ACL_ACCESS_T ||
91 xattr_type == XATTR_ACL_DEFAULT_T) &&
92 !(sbi->ll_flags & LL_SBI_ACL))
95 if (xattr_type == XATTR_USER_T && !(sbi->ll_flags & LL_SBI_USER_XATTR))
97 if (xattr_type == XATTR_TRUSTED_T && !cfs_capable(CFS_CAP_SYS_ADMIN))
99 if (xattr_type == XATTR_OTHER_T)
105 /* xattr related to IMA(Integrity Measurement Architecture) */
106 #ifndef XATTR_NAME_IMA
107 #define XATTR_NAME_IMA "security.ima"
108 #define XATTR_NAME_EVM "security.evm"
112 int ll_setxattr_common(struct inode *inode, const char *name,
113 const void *value, size_t size,
114 int flags, __u64 valid)
116 struct ll_sb_info *sbi = ll_i2sbi(inode);
117 struct ptlrpc_request *req = NULL;
119 posix_acl_xattr_header *new_value = NULL;
120 struct rmtacl_ctl_entry *rce = NULL;
121 ext_acl_xattr_header *acl = NULL;
122 const char *pv = value;
125 /*FIXME: enable IMA when the conditions are ready */
126 if (strncmp(name, XATTR_NAME_IMA,
127 sizeof(XATTR_NAME_IMA)) == 0 ||
128 strncmp(name, XATTR_NAME_EVM,
129 sizeof(XATTR_NAME_EVM)) == 0)
132 xattr_type = get_xattr_type(name);
133 rc = xattr_type_filter(sbi, xattr_type);
137 if ((xattr_type == XATTR_ACL_ACCESS_T ||
138 xattr_type == XATTR_ACL_DEFAULT_T) &&
139 #ifdef HAVE_INODE_OWNER_OR_CAPABLE
140 !inode_owner_or_capable(inode))
142 !is_owner_or_cap(inode))
146 /* b10667: ignore lustre special xattr for now */
147 if ((xattr_type == XATTR_TRUSTED_T && strcmp(name, "trusted.lov") == 0) ||
148 (xattr_type == XATTR_LUSTRE_T && strcmp(name, "lustre.lov") == 0))
151 /* b15587: ignore security.capability xattr for now */
152 if ((xattr_type == XATTR_SECURITY_T &&
153 strcmp(name, "security.capability") == 0))
156 /* LU-549: Disable security.selinux when selinux is disabled */
157 if (xattr_type == XATTR_SECURITY_T && !selinux_is_enabled() &&
158 strcmp(name, "security.selinux") == 0)
161 #ifdef CONFIG_FS_POSIX_ACL
162 if (sbi->ll_flags & LL_SBI_RMT_CLIENT &&
163 (xattr_type == XATTR_ACL_ACCESS_T ||
164 xattr_type == XATTR_ACL_DEFAULT_T)) {
165 rce = rct_search(&sbi->ll_rct, current_pid());
167 (rce->rce_ops != RMT_LSETFACL &&
168 rce->rce_ops != RMT_RSETFACL))
171 if (rce->rce_ops == RMT_LSETFACL) {
172 struct eacl_entry *ee;
174 ee = et_search_del(&sbi->ll_et, current_pid(),
175 ll_inode2fid(inode), xattr_type);
177 if (valid & OBD_MD_FLXATTR) {
178 acl = lustre_acl_xattr_merge2ext(
179 (posix_acl_xattr_header *)value,
183 RETURN(PTR_ERR(acl));
185 size = CFS_ACL_XATTR_SIZE(\
186 le32_to_cpu(acl->a_count), \
188 pv = (const char *)acl;
191 } else if (rce->rce_ops == RMT_RSETFACL) {
192 int acl_size = lustre_posix_acl_xattr_filter(
193 (posix_acl_xattr_header *)value,
195 if (unlikely(acl_size < 0))
199 pv = (const char *)new_value;
203 valid |= rce_ops2valid(rce->rce_ops);
206 rc = md_setxattr(sbi->ll_md_exp, ll_inode2fid(inode), valid, name, pv,
207 size, 0, flags, ll_i2suppgid(inode), &req);
209 #ifdef CONFIG_FS_POSIX_ACL
210 if (new_value != NULL)
211 lustre_posix_acl_xattr_free(new_value, size);
213 lustre_ext_acl_xattr_free(acl);
216 if (rc == -EOPNOTSUPP && xattr_type == XATTR_USER_T) {
217 LCONSOLE_INFO("Disabling user_xattr feature because "
218 "it is not supported on the server\n");
219 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
224 ptlrpc_req_finished(req);
228 int ll_setxattr(struct dentry *dentry, const char *name,
229 const void *value, size_t size, int flags)
231 struct inode *inode = dentry->d_inode;
236 CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p), xattr %s\n",
237 PFID(ll_inode2fid(inode)), inode, name);
239 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_SETXATTR, 1);
241 if ((strncmp(name, XATTR_TRUSTED_PREFIX,
242 sizeof(XATTR_TRUSTED_PREFIX) - 1) == 0 &&
243 strcmp(name + sizeof(XATTR_TRUSTED_PREFIX) - 1, "lov") == 0) ||
244 (strncmp(name, XATTR_LUSTRE_PREFIX,
245 sizeof(XATTR_LUSTRE_PREFIX) - 1) == 0 &&
246 strcmp(name + sizeof(XATTR_LUSTRE_PREFIX) - 1, "lov") == 0)) {
247 struct lov_user_md *lump = (struct lov_user_md *)value;
250 /* Attributes that are saved via getxattr will always have
251 * the stripe_offset as 0. Instead, the MDS should be
252 * allowed to pick the starting OST index. b=17846 */
253 if (lump != NULL && lump->lmm_stripe_offset == 0)
254 lump->lmm_stripe_offset = -1;
256 if (lump != NULL && S_ISREG(inode->i_mode)) {
258 __u64 it_flags = FMODE_WRITE;
261 lum_size = ll_lov_user_md_size(lump);
262 if (lum_size < 0 || size < lum_size)
263 return 0; /* b=10667: ignore error */
265 memset(&f, 0, sizeof(f)); /* f.f_flags is used below */
266 f.f_path.dentry = dentry;
267 rc = ll_lov_setstripe_ea_info(inode, &f, it_flags, lump,
269 /* b=10667: rc always be 0 here for now */
271 } else if (S_ISDIR(inode->i_mode)) {
272 rc = ll_dir_setstripe(inode, lump, 0);
277 } else if (strcmp(name, XATTR_NAME_LMA) == 0 ||
278 strcmp(name, XATTR_NAME_LINK) == 0)
281 return ll_setxattr_common(inode, name, value, size, flags,
285 int ll_removexattr(struct dentry *dentry, const char *name)
287 struct inode *inode = dentry->d_inode;
292 CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p), xattr %s\n",
293 PFID(ll_inode2fid(inode)), inode, name);
295 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_REMOVEXATTR, 1);
296 return ll_setxattr_common(inode, name, NULL, 0, 0,
300 int ll_getxattr_common(struct inode *inode, const char *name,
301 void *buffer, size_t size, __u64 valid)
303 struct ll_sb_info *sbi = ll_i2sbi(inode);
304 struct ptlrpc_request *req = NULL;
305 struct mdt_body *body;
308 struct rmtacl_ctl_entry *rce = NULL;
309 struct ll_inode_info *lli = ll_i2info(inode);
312 CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
313 PFID(ll_inode2fid(inode)), inode);
315 /* listxattr have slightly different behavior from of ext3:
316 * without 'user_xattr' ext3 will list all xattr names but
317 * filtered out "^user..*"; we list them all for simplicity.
320 xattr_type = XATTR_OTHER_T;
324 xattr_type = get_xattr_type(name);
325 rc = xattr_type_filter(sbi, xattr_type);
329 /* b15587: ignore security.capability xattr for now */
330 if ((xattr_type == XATTR_SECURITY_T &&
331 strcmp(name, "security.capability") == 0))
334 /* LU-549: Disable security.selinux when selinux is disabled */
335 if (xattr_type == XATTR_SECURITY_T && !selinux_is_enabled() &&
336 strcmp(name, "security.selinux") == 0)
339 #ifdef CONFIG_FS_POSIX_ACL
340 if (sbi->ll_flags & LL_SBI_RMT_CLIENT &&
341 (xattr_type == XATTR_ACL_ACCESS_T ||
342 xattr_type == XATTR_ACL_DEFAULT_T)) {
343 rce = rct_search(&sbi->ll_rct, current_pid());
345 (rce->rce_ops != RMT_LSETFACL &&
346 rce->rce_ops != RMT_LGETFACL &&
347 rce->rce_ops != RMT_RSETFACL &&
348 rce->rce_ops != RMT_RGETFACL))
352 /* posix acl is under protection of LOOKUP lock. when calling to this,
353 * we just have path resolution to the target inode, so we have great
354 * chance that cached ACL is uptodate.
356 if (xattr_type == XATTR_ACL_ACCESS_T &&
357 !(sbi->ll_flags & LL_SBI_RMT_CLIENT)) {
359 struct posix_acl *acl;
361 spin_lock(&lli->lli_lock);
362 acl = posix_acl_dup(lli->lli_posix_acl);
363 spin_unlock(&lli->lli_lock);
368 rc = posix_acl_to_xattr(&init_user_ns, acl, buffer, size);
369 posix_acl_release(acl);
372 if (xattr_type == XATTR_ACL_DEFAULT_T && !S_ISDIR(inode->i_mode))
377 if (sbi->ll_xattr_cache_enabled &&
378 xattr_type != XATTR_ACL_ACCESS_T &&
379 (xattr_type != XATTR_SECURITY_T ||
380 strcmp(name, "security.selinux") != 0)) {
381 rc = ll_xattr_cache_get(inode, name, buffer, size, valid);
383 goto getxattr_nocache;
387 /* Add "system.posix_acl_access" to the list */
388 if (lli->lli_posix_acl != NULL && valid & OBD_MD_FLXATTRLS) {
390 rc += sizeof(XATTR_NAME_ACL_ACCESS);
391 } else if (size - rc >= sizeof(XATTR_NAME_ACL_ACCESS)) {
392 memcpy(buffer + rc, XATTR_NAME_ACL_ACCESS,
393 sizeof(XATTR_NAME_ACL_ACCESS));
394 rc += sizeof(XATTR_NAME_ACL_ACCESS);
396 GOTO(out_xattr, rc = -ERANGE);
401 rc = md_getxattr(sbi->ll_md_exp, ll_inode2fid(inode),
402 valid | (rce ? rce_ops2valid(rce->rce_ops) : 0),
403 name, NULL, 0, size, 0, &req);
408 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
411 /* only detect the xattr size */
413 GOTO(out, rc = body->mbo_eadatasize);
415 if (size < body->mbo_eadatasize) {
416 CERROR("server bug: replied size %u > %u\n",
417 body->mbo_eadatasize, (int)size);
418 GOTO(out, rc = -ERANGE);
421 if (body->mbo_eadatasize == 0)
422 GOTO(out, rc = -ENODATA);
424 /* do not need swab xattr data */
425 xdata = req_capsule_server_sized_get(&req->rq_pill, &RMF_EADATA,
426 body->mbo_eadatasize);
428 GOTO(out, rc = -EFAULT);
430 memcpy(buffer, xdata, body->mbo_eadatasize);
431 rc = body->mbo_eadatasize;
434 #ifdef CONFIG_FS_POSIX_ACL
435 if (rce != NULL && rce->rce_ops == RMT_LSETFACL) {
436 ext_acl_xattr_header *acl;
438 acl = lustre_posix_acl_xattr_2ext(buffer, rc);
440 GOTO(out, rc = PTR_ERR(acl));
442 rc = ee_add(&sbi->ll_et, current_pid(), ll_inode2fid(inode),
444 if (unlikely(rc < 0)) {
445 lustre_ext_acl_xattr_free(acl);
453 if (rc == -EOPNOTSUPP && xattr_type == XATTR_USER_T) {
454 LCONSOLE_INFO("%s: disabling user_xattr feature because "
455 "it is not supported on the server: rc = %d\n",
456 ll_get_fsname(inode->i_sb, NULL, 0), rc);
457 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
460 ptlrpc_req_finished(req);
464 static ssize_t ll_getxattr_lov(struct inode *inode, void *buf, size_t buf_size)
468 if (S_ISREG(inode->i_mode)) {
469 struct cl_object *obj = ll_i2info(inode)->lli_clob;
471 struct cl_layout cl = {
472 .cl_buf.lb_buf = buf,
473 .cl_buf.lb_len = buf_size,
480 env = cl_env_get(&refcheck);
482 RETURN(PTR_ERR(env));
484 rc = cl_object_layout_get(env, obj, &cl);
489 GOTO(out_env, rc = -ENODATA);
496 LASSERT(buf != NULL && rc <= buf_size);
498 /* Do not return layout gen for getxattr() since
499 * otherwise it would confuse tar --xattr by
500 * recognizing layout gen as stripe offset when the
501 * file is restored. See LU-2809. */
502 ((struct lov_mds_md *)buf)->lmm_layout_gen = 0;
504 cl_env_put(env, &refcheck);
507 } else if (S_ISDIR(inode->i_mode)) {
508 struct lov_mds_md *lmm = NULL;
510 struct ptlrpc_request *req = NULL;
512 rc = ll_dir_getstripe(inode, (void **)&lmm, &lmm_size,
518 GOTO(out_req, rc = lmm_size);
520 if (buf_size < lmm_size)
521 GOTO(out_req, rc = -ERANGE);
523 memcpy(buf, lmm, lmm_size);
524 GOTO(out_req, rc = lmm_size);
527 ptlrpc_req_finished(req);
535 ssize_t ll_getxattr(struct dentry *dentry, const char *name, void *buf,
538 struct inode *inode = dentry->d_inode;
543 CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p), xattr %s\n",
544 PFID(ll_inode2fid(inode)), inode, name);
546 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_GETXATTR, 1);
548 if (strcmp(name, XATTR_LUSTRE_LOV) == 0 ||
549 strcmp(name, XATTR_NAME_LOV) == 0)
550 return ll_getxattr_lov(inode, buf, buf_size);
552 return ll_getxattr_common(inode, name, buf, buf_size,
556 ssize_t ll_listxattr(struct dentry *dentry, char *buf, size_t buf_size)
558 struct inode *inode = dentry->d_inode;
559 struct ll_sb_info *sbi = ll_i2sbi(inode);
564 CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
565 PFID(ll_inode2fid(inode)), inode);
567 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_LISTXATTR, 1);
569 rc = ll_getxattr_common(inode, NULL, buf, buf_size, OBD_MD_FLXATTRLS);
573 /* If we're being called to get the size of the xattr list
574 * (buf_size == 0) then just assume that a lustre.lov xattr
577 RETURN(rc + sizeof(XATTR_LUSTRE_LOV));
583 len = strnlen(xattr_name, rem - 1) + 1;
585 if (xattr_type_filter(sbi, get_xattr_type(xattr_name)) == 0) {
586 /* Skip OK xattr type, leave it in buffer. */
591 /* Move up remaining xattrs in buffer removing the
592 * xattr that is not OK. */
593 memmove(xattr_name, xattr_name + len, rem);
597 rc2 = ll_getxattr_lov(inode, NULL, 0);
604 if (buf_size < rc + sizeof(XATTR_LUSTRE_LOV))
607 memcpy(buf + rc, XATTR_LUSTRE_LOV, sizeof(XATTR_LUSTRE_LOV));
609 RETURN(rc + sizeof(XATTR_LUSTRE_LOV));