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, 2015, 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/xattr.h>
41 #include <linux/selinux.h>
43 #define DEBUG_SUBSYSTEM S_LLITE
45 #include <obd_support.h>
46 #include <lustre_dlm.h>
47 #include <lustre_ver.h>
48 #include <lustre_eacl.h>
50 #include "llite_internal.h"
52 /* xattr related to IMA(Integrity Measurement Architecture) */
53 #ifndef XATTR_NAME_IMA
54 #define XATTR_NAME_IMA "security.ima"
56 #ifndef XATTR_NAME_EVM
57 #define XATTR_NAME_EVM "security.evm"
60 #define XATTR_USER_T (1)
61 #define XATTR_TRUSTED_T (2)
62 #define XATTR_SECURITY_T (3)
63 #define XATTR_ACL_ACCESS_T (4)
64 #define XATTR_ACL_DEFAULT_T (5)
65 #define XATTR_LUSTRE_T (6)
66 #define XATTR_OTHER_T (7)
69 int get_xattr_type(const char *name)
71 if (!strcmp(name, XATTR_NAME_POSIX_ACL_ACCESS))
72 return XATTR_ACL_ACCESS_T;
74 if (!strcmp(name, XATTR_NAME_POSIX_ACL_DEFAULT))
75 return XATTR_ACL_DEFAULT_T;
77 if (!strncmp(name, XATTR_USER_PREFIX,
78 sizeof(XATTR_USER_PREFIX) - 1))
81 if (!strncmp(name, XATTR_TRUSTED_PREFIX,
82 sizeof(XATTR_TRUSTED_PREFIX) - 1))
83 return XATTR_TRUSTED_T;
85 if (!strncmp(name, XATTR_SECURITY_PREFIX,
86 sizeof(XATTR_SECURITY_PREFIX) - 1))
87 return XATTR_SECURITY_T;
89 if (!strncmp(name, XATTR_LUSTRE_PREFIX,
90 sizeof(XATTR_LUSTRE_PREFIX) - 1))
91 return XATTR_LUSTRE_T;
97 int xattr_type_filter(struct ll_sb_info *sbi, int xattr_type)
99 if ((xattr_type == XATTR_ACL_ACCESS_T ||
100 xattr_type == XATTR_ACL_DEFAULT_T) &&
101 !(sbi->ll_flags & LL_SBI_ACL))
104 if (xattr_type == XATTR_USER_T && !(sbi->ll_flags & LL_SBI_USER_XATTR))
106 if (xattr_type == XATTR_TRUSTED_T && !cfs_capable(CFS_CAP_SYS_ADMIN))
108 if (xattr_type == XATTR_OTHER_T)
115 int ll_setxattr_common(struct inode *inode, const char *name,
116 const void *value, size_t size,
117 int flags, __u64 valid)
119 struct ll_sb_info *sbi = ll_i2sbi(inode);
120 struct ptlrpc_request *req = 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 (strcmp(name, XATTR_NAME_HSM) == 0 ||
148 (xattr_type == XATTR_TRUSTED_T &&
149 strcmp(name, XATTR_NAME_LOV) == 0) ||
150 (xattr_type == XATTR_LUSTRE_T &&
151 strcmp(name, "lustre.lov") == 0))
154 /* b15587: ignore security.capability xattr for now */
155 if ((xattr_type == XATTR_SECURITY_T &&
156 strcmp(name, "security.capability") == 0))
159 /* LU-549: Disable security.selinux when selinux is disabled */
160 if (xattr_type == XATTR_SECURITY_T && !selinux_is_enabled() &&
161 strcmp(name, "security.selinux") == 0)
164 /* In user.* namespace, only regular files and directories can have
165 * extended attributes. */
166 if (xattr_type == XATTR_USER_T) {
167 if (!S_ISREG(inode->i_mode) && !S_ISDIR(inode->i_mode))
171 rc = md_setxattr(sbi->ll_md_exp, ll_inode2fid(inode), valid, name, pv,
172 size, 0, flags, ll_i2suppgid(inode), &req);
174 if (rc == -EOPNOTSUPP && xattr_type == XATTR_USER_T) {
175 LCONSOLE_INFO("Disabling user_xattr feature because "
176 "it is not supported on the server\n");
177 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
182 ptlrpc_req_finished(req);
186 static int get_hsm_state(struct inode *inode, __u32 *hus_states)
188 struct md_op_data *op_data;
189 struct hsm_user_state *hus;
196 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
197 LUSTRE_OPC_ANY, hus);
198 if (!IS_ERR(op_data)) {
199 rc = obd_iocontrol(LL_IOC_HSM_STATE_GET, ll_i2mdexp(inode),
200 sizeof(*op_data), op_data, NULL);
202 *hus_states = hus->hus_states;
204 CDEBUG(D_VFSTRACE, "obd_iocontrol failed. rc = %d\n",
207 ll_finish_md_op_data(op_data);
209 rc = PTR_ERR(op_data);
210 CDEBUG(D_VFSTRACE, "Could not prepare the opdata. rc = %d\n",
217 int ll_setxattr(struct dentry *dentry, const char *name,
218 const void *value, size_t size, int flags)
220 struct inode *inode = dentry->d_inode;
225 CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p), xattr %s\n",
226 PFID(ll_inode2fid(inode)), inode, name);
228 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_SETXATTR, 1);
230 if ((strncmp(name, XATTR_TRUSTED_PREFIX,
231 sizeof(XATTR_TRUSTED_PREFIX) - 1) == 0 &&
232 strcmp(name + sizeof(XATTR_TRUSTED_PREFIX) - 1, "lov") == 0) ||
233 (strncmp(name, XATTR_LUSTRE_PREFIX,
234 sizeof(XATTR_LUSTRE_PREFIX) - 1) == 0 &&
235 strcmp(name + sizeof(XATTR_LUSTRE_PREFIX) - 1, "lov") == 0)) {
236 struct lov_user_md *lump = (struct lov_user_md *)value;
239 /* Attributes that are saved via getxattr will always have
240 * the stripe_offset as 0. Instead, the MDS should be
241 * allowed to pick the starting OST index. b=17846 */
242 if (lump != NULL && lump->lmm_stripe_offset == 0)
243 lump->lmm_stripe_offset = -1;
244 /* Avoid anyone directly setting the RELEASED flag. */
246 (lump->lmm_pattern & LOV_PATTERN_F_RELEASED)) {
247 /* Only if we have a released flag check if the file
248 * was indeed archived. */
249 __u32 state = HS_NONE;
250 rc = get_hsm_state(inode, &state);
253 if (!(state & HS_ARCHIVED)) {
255 "hus_states state = %x, pattern = %x\n",
256 state, lump->lmm_pattern);
257 /* Here the state is: real file is not
258 * archived but user is requesting to set
259 * the RELEASED flag so we mask off the
260 * released flag from the request */
261 lump->lmm_pattern ^= LOV_PATTERN_F_RELEASED;
265 if (lump != NULL && S_ISREG(inode->i_mode)) {
267 __u64 it_flags = FMODE_WRITE;
270 lum_size = ll_lov_user_md_size(lump);
271 if (lum_size < 0 || size < lum_size)
272 return 0; /* b=10667: ignore error */
274 memset(&f, 0, sizeof(f)); /* f.f_flags is used below */
275 f.f_path.dentry = dentry;
276 rc = ll_lov_setstripe_ea_info(inode, &f, it_flags, lump,
278 /* b=10667: rc always be 0 here for now */
280 } else if (S_ISDIR(inode->i_mode)) {
281 rc = ll_dir_setstripe(inode, lump, 0);
286 } else if (strcmp(name, XATTR_NAME_LMA) == 0 ||
287 strcmp(name, XATTR_NAME_LINK) == 0)
290 return ll_setxattr_common(inode, name, value, size, flags,
294 int ll_removexattr(struct dentry *dentry, const char *name)
296 struct inode *inode = dentry->d_inode;
301 CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p), xattr %s\n",
302 PFID(ll_inode2fid(inode)), inode, name);
304 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_REMOVEXATTR, 1);
305 return ll_setxattr_common(inode, name, NULL, 0, 0,
309 int ll_getxattr_common(struct inode *inode, const char *name,
310 void *buffer, size_t size, __u64 valid)
312 struct ll_sb_info *sbi = ll_i2sbi(inode);
313 struct ptlrpc_request *req = NULL;
314 struct mdt_body *body;
317 struct ll_inode_info *lli = ll_i2info(inode);
320 CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
321 PFID(ll_inode2fid(inode)), inode);
323 /* listxattr have slightly different behavior from of ext3:
324 * without 'user_xattr' ext3 will list all xattr names but
325 * filtered out "^user..*"; we list them all for simplicity.
328 xattr_type = XATTR_OTHER_T;
332 xattr_type = get_xattr_type(name);
333 rc = xattr_type_filter(sbi, xattr_type);
337 /* b15587: ignore security.capability xattr for now */
338 if ((xattr_type == XATTR_SECURITY_T &&
339 strcmp(name, "security.capability") == 0))
342 /* LU-549: Disable security.selinux when selinux is disabled */
343 if (xattr_type == XATTR_SECURITY_T && !selinux_is_enabled() &&
344 strcmp(name, "security.selinux") == 0)
347 #ifdef CONFIG_FS_POSIX_ACL
348 /* posix acl is under protection of LOOKUP lock. when calling to this,
349 * we just have path resolution to the target inode, so we have great
350 * chance that cached ACL is uptodate.
352 if (xattr_type == XATTR_ACL_ACCESS_T) {
353 struct posix_acl *acl;
355 spin_lock(&lli->lli_lock);
356 acl = posix_acl_dup(lli->lli_posix_acl);
357 spin_unlock(&lli->lli_lock);
362 rc = posix_acl_to_xattr(&init_user_ns, acl, buffer, size);
363 posix_acl_release(acl);
366 if (xattr_type == XATTR_ACL_DEFAULT_T && !S_ISDIR(inode->i_mode))
371 if (sbi->ll_xattr_cache_enabled &&
372 xattr_type != XATTR_ACL_ACCESS_T &&
373 (xattr_type != XATTR_SECURITY_T ||
374 strcmp(name, "security.selinux") != 0)) {
375 rc = ll_xattr_cache_get(inode, name, buffer, size, valid);
377 goto getxattr_nocache;
381 /* Add "system.posix_acl_access" to the list */
382 if (lli->lli_posix_acl != NULL && valid & OBD_MD_FLXATTRLS) {
384 rc += sizeof(XATTR_NAME_ACL_ACCESS);
385 } else if (size - rc >= sizeof(XATTR_NAME_ACL_ACCESS)) {
386 memcpy(buffer + rc, XATTR_NAME_ACL_ACCESS,
387 sizeof(XATTR_NAME_ACL_ACCESS));
388 rc += sizeof(XATTR_NAME_ACL_ACCESS);
390 GOTO(out_xattr, rc = -ERANGE);
395 rc = md_getxattr(sbi->ll_md_exp, ll_inode2fid(inode),
396 valid, name, NULL, 0, size, 0, &req);
401 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
404 /* only detect the xattr size */
406 GOTO(out, rc = body->mbo_eadatasize);
408 if (size < body->mbo_eadatasize) {
409 CERROR("server bug: replied size %u > %u\n",
410 body->mbo_eadatasize, (int)size);
411 GOTO(out, rc = -ERANGE);
414 if (body->mbo_eadatasize == 0)
415 GOTO(out, rc = -ENODATA);
417 /* do not need swab xattr data */
418 xdata = req_capsule_server_sized_get(&req->rq_pill, &RMF_EADATA,
419 body->mbo_eadatasize);
421 GOTO(out, rc = -EFAULT);
423 memcpy(buffer, xdata, body->mbo_eadatasize);
424 rc = body->mbo_eadatasize;
430 if (rc == -EOPNOTSUPP && xattr_type == XATTR_USER_T) {
431 LCONSOLE_INFO("%s: disabling user_xattr feature because "
432 "it is not supported on the server: rc = %d\n",
433 ll_get_fsname(inode->i_sb, NULL, 0), rc);
434 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
437 ptlrpc_req_finished(req);
441 static ssize_t ll_getxattr_lov(struct inode *inode, void *buf, size_t buf_size)
445 if (S_ISREG(inode->i_mode)) {
446 struct cl_object *obj = ll_i2info(inode)->lli_clob;
448 struct cl_layout cl = {
449 .cl_buf.lb_buf = buf,
450 .cl_buf.lb_len = buf_size,
457 env = cl_env_get(&refcheck);
459 RETURN(PTR_ERR(env));
461 rc = cl_object_layout_get(env, obj, &cl);
466 GOTO(out_env, rc = -ENODATA);
473 LASSERT(buf != NULL && rc <= buf_size);
475 /* Do not return layout gen for getxattr() since
476 * otherwise it would confuse tar --xattr by
477 * recognizing layout gen as stripe offset when the
478 * file is restored. See LU-2809. */
479 ((struct lov_mds_md *)buf)->lmm_layout_gen = 0;
481 cl_env_put(env, &refcheck);
484 } else if (S_ISDIR(inode->i_mode)) {
485 struct lov_mds_md *lmm = NULL;
487 struct ptlrpc_request *req = NULL;
489 rc = ll_dir_getstripe(inode, (void **)&lmm, &lmm_size,
495 GOTO(out_req, rc = lmm_size);
497 if (buf_size < lmm_size)
498 GOTO(out_req, rc = -ERANGE);
500 memcpy(buf, lmm, lmm_size);
501 GOTO(out_req, rc = lmm_size);
504 ptlrpc_req_finished(req);
512 ssize_t ll_getxattr(struct dentry *dentry, const char *name, void *buf,
515 struct inode *inode = dentry->d_inode;
520 CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p), xattr %s\n",
521 PFID(ll_inode2fid(inode)), inode, name);
523 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_GETXATTR, 1);
525 if (strcmp(name, XATTR_LUSTRE_LOV) == 0 ||
526 strcmp(name, XATTR_NAME_LOV) == 0)
527 return ll_getxattr_lov(inode, buf, buf_size);
529 return ll_getxattr_common(inode, name, buf, buf_size,
533 ssize_t ll_listxattr(struct dentry *dentry, char *buf, size_t buf_size)
535 struct inode *inode = dentry->d_inode;
536 struct ll_sb_info *sbi = ll_i2sbi(inode);
541 CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
542 PFID(ll_inode2fid(inode)), inode);
544 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_LISTXATTR, 1);
546 rc = ll_getxattr_common(inode, NULL, buf, buf_size, OBD_MD_FLXATTRLS);
550 /* If we're being called to get the size of the xattr list
551 * (buf_size == 0) then just assume that a lustre.lov xattr
554 RETURN(rc + sizeof(XATTR_LUSTRE_LOV));
560 len = strnlen(xattr_name, rem - 1) + 1;
562 if (xattr_type_filter(sbi, get_xattr_type(xattr_name)) == 0) {
563 /* Skip OK xattr type, leave it in buffer. */
568 /* Move up remaining xattrs in buffer removing the
569 * xattr that is not OK. */
570 memmove(xattr_name, xattr_name + len, rem);
574 rc2 = ll_getxattr_lov(inode, NULL, 0);
581 if (buf_size < rc + sizeof(XATTR_LUSTRE_LOV))
584 memcpy(buf + rc, XATTR_LUSTRE_LOV, sizeof(XATTR_LUSTRE_LOV));
586 RETURN(rc + sizeof(XATTR_LUSTRE_LOV));