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37#include <linux/fs.h>
38#include <linux/sched.h>
39#include <linux/mm.h>
40#include <linux/selinux.h>
41
42#define DEBUG_SUBSYSTEM S_LLITE
43
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>
49
50#include "llite_internal.h"
51
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)
59
60static
61int get_xattr_type(const char *name)
62{
63 if (!strcmp(name, POSIX_ACL_XATTR_ACCESS))
64 return XATTR_ACL_ACCESS_T;
65
66 if (!strcmp(name, POSIX_ACL_XATTR_DEFAULT))
67 return XATTR_ACL_DEFAULT_T;
68
69 if (!strncmp(name, XATTR_USER_PREFIX,
70 sizeof(XATTR_USER_PREFIX) - 1))
71 return XATTR_USER_T;
72
73 if (!strncmp(name, XATTR_TRUSTED_PREFIX,
74 sizeof(XATTR_TRUSTED_PREFIX) - 1))
75 return XATTR_TRUSTED_T;
76
77 if (!strncmp(name, XATTR_SECURITY_PREFIX,
78 sizeof(XATTR_SECURITY_PREFIX) - 1))
79 return XATTR_SECURITY_T;
80
81 if (!strncmp(name, XATTR_LUSTRE_PREFIX,
82 sizeof(XATTR_LUSTRE_PREFIX) - 1))
83 return XATTR_LUSTRE_T;
84
85 return XATTR_OTHER_T;
86}
87
88static
89int xattr_type_filter(struct ll_sb_info *sbi, int xattr_type)
90{
91 if ((xattr_type == XATTR_ACL_ACCESS_T ||
92 xattr_type == XATTR_ACL_DEFAULT_T) &&
93 !(sbi->ll_flags & LL_SBI_ACL))
94 return -EOPNOTSUPP;
95
96 if (xattr_type == XATTR_USER_T && !(sbi->ll_flags & LL_SBI_USER_XATTR))
97 return -EOPNOTSUPP;
98 if (xattr_type == XATTR_TRUSTED_T && !cfs_capable(CFS_CAP_SYS_ADMIN))
99 return -EPERM;
100 if (xattr_type == XATTR_OTHER_T)
101 return -EOPNOTSUPP;
102
103 return 0;
104}
105
106static
107int ll_setxattr_common(struct inode *inode, const char *name,
108 const void *value, size_t size,
109 int flags, __u64 valid)
110{
111 struct ll_sb_info *sbi = ll_i2sbi(inode);
112 struct ptlrpc_request *req;
113 int xattr_type, rc;
114 struct obd_capa *oc;
115#ifdef CONFIG_FS_POSIX_ACL
116 posix_acl_xattr_header *new_value = NULL;
117 struct rmtacl_ctl_entry *rce = NULL;
118 ext_acl_xattr_header *acl = NULL;
119#endif
120 const char *pv = value;
121
122 xattr_type = get_xattr_type(name);
123 rc = xattr_type_filter(sbi, xattr_type);
124 if (rc)
125 return rc;
126
127
128 if ((xattr_type == XATTR_TRUSTED_T && strcmp(name, "trusted.lov") == 0) ||
129 (xattr_type == XATTR_LUSTRE_T && strcmp(name, "lustre.lov") == 0))
130 return 0;
131
132
133 if ((xattr_type == XATTR_SECURITY_T &&
134 strcmp(name, "security.capability") == 0))
135 return 0;
136
137
138 if (xattr_type == XATTR_SECURITY_T && !selinux_is_enabled() &&
139 strcmp(name, "security.selinux") == 0)
140 return -EOPNOTSUPP;
141
142#ifdef CONFIG_FS_POSIX_ACL
143 if (sbi->ll_flags & LL_SBI_RMT_CLIENT &&
144 (xattr_type == XATTR_ACL_ACCESS_T ||
145 xattr_type == XATTR_ACL_DEFAULT_T)) {
146 rce = rct_search(&sbi->ll_rct, current_pid());
147 if (rce == NULL ||
148 (rce->rce_ops != RMT_LSETFACL &&
149 rce->rce_ops != RMT_RSETFACL))
150 return -EOPNOTSUPP;
151
152 if (rce->rce_ops == RMT_LSETFACL) {
153 struct eacl_entry *ee;
154
155 ee = et_search_del(&sbi->ll_et, current_pid(),
156 ll_inode2fid(inode), xattr_type);
157 LASSERT(ee != NULL);
158 if (valid & OBD_MD_FLXATTR) {
159 acl = lustre_acl_xattr_merge2ext(
160 (posix_acl_xattr_header *)value,
161 size, ee->ee_acl);
162 if (IS_ERR(acl)) {
163 ee_free(ee);
164 return PTR_ERR(acl);
165 }
166 size = CFS_ACL_XATTR_SIZE(\
167 le32_to_cpu(acl->a_count), \
168 ext_acl_xattr);
169 pv = (const char *)acl;
170 }
171 ee_free(ee);
172 } else if (rce->rce_ops == RMT_RSETFACL) {
173 size = lustre_posix_acl_xattr_filter(
174 (posix_acl_xattr_header *)value,
175 size, &new_value);
176 if (unlikely(size < 0))
177 return size;
178
179 pv = (const char *)new_value;
180 } else
181 return -EOPNOTSUPP;
182
183 valid |= rce_ops2valid(rce->rce_ops);
184 }
185#endif
186 oc = ll_mdscapa_get(inode);
187 rc = md_setxattr(sbi->ll_md_exp, ll_inode2fid(inode), oc,
188 valid, name, pv, size, 0, flags, ll_i2suppgid(inode),
189 &req);
190 capa_put(oc);
191#ifdef CONFIG_FS_POSIX_ACL
192 if (new_value != NULL)
193 lustre_posix_acl_xattr_free(new_value, size);
194 if (acl != NULL)
195 lustre_ext_acl_xattr_free(acl);
196#endif
197 if (rc) {
198 if (rc == -EOPNOTSUPP && xattr_type == XATTR_USER_T) {
199 LCONSOLE_INFO("Disabling user_xattr feature because "
200 "it is not supported on the server\n");
201 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
202 }
203 return rc;
204 }
205
206 ptlrpc_req_finished(req);
207 return 0;
208}
209
210int ll_setxattr(struct dentry *dentry, const char *name,
211 const void *value, size_t size, int flags)
212{
213 struct inode *inode = dentry->d_inode;
214
215 LASSERT(inode);
216 LASSERT(name);
217
218 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), xattr %s\n",
219 inode->i_ino, inode->i_generation, inode, name);
220
221 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_SETXATTR, 1);
222
223 if ((strncmp(name, XATTR_TRUSTED_PREFIX,
224 sizeof(XATTR_TRUSTED_PREFIX) - 1) == 0 &&
225 strcmp(name + sizeof(XATTR_TRUSTED_PREFIX) - 1, "lov") == 0) ||
226 (strncmp(name, XATTR_LUSTRE_PREFIX,
227 sizeof(XATTR_LUSTRE_PREFIX) - 1) == 0 &&
228 strcmp(name + sizeof(XATTR_LUSTRE_PREFIX) - 1, "lov") == 0)) {
229 struct lov_user_md *lump = (struct lov_user_md *)value;
230 int rc = 0;
231
232
233
234
235 if (lump != NULL && lump->lmm_stripe_offset == 0)
236 lump->lmm_stripe_offset = -1;
237
238 if (lump != NULL && S_ISREG(inode->i_mode)) {
239 struct file f;
240 int flags = FMODE_WRITE;
241 int lum_size = (lump->lmm_magic == LOV_USER_MAGIC_V1) ?
242 sizeof(*lump) : sizeof(struct lov_user_md_v3);
243
244 f.f_dentry = dentry;
245 rc = ll_lov_setstripe_ea_info(inode, &f, flags, lump,
246 lum_size);
247
248 rc = 0;
249 } else if (S_ISDIR(inode->i_mode)) {
250 rc = ll_dir_setstripe(inode, lump, 0);
251 }
252
253 return rc;
254
255 } else if (strcmp(name, XATTR_NAME_LMA) == 0 ||
256 strcmp(name, XATTR_NAME_LINK) == 0)
257 return 0;
258
259 return ll_setxattr_common(inode, name, value, size, flags,
260 OBD_MD_FLXATTR);
261}
262
263int ll_removexattr(struct dentry *dentry, const char *name)
264{
265 struct inode *inode = dentry->d_inode;
266
267 LASSERT(inode);
268 LASSERT(name);
269
270 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), xattr %s\n",
271 inode->i_ino, inode->i_generation, inode, name);
272
273 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_REMOVEXATTR, 1);
274 return ll_setxattr_common(inode, name, NULL, 0, 0,
275 OBD_MD_FLXATTRRM);
276}
277
278static
279int ll_getxattr_common(struct inode *inode, const char *name,
280 void *buffer, size_t size, __u64 valid)
281{
282 struct ll_sb_info *sbi = ll_i2sbi(inode);
283 struct ptlrpc_request *req = NULL;
284 struct mdt_body *body;
285 int xattr_type, rc;
286 void *xdata;
287 struct obd_capa *oc;
288 struct rmtacl_ctl_entry *rce = NULL;
289
290 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n",
291 inode->i_ino, inode->i_generation, inode);
292
293
294
295
296
297 if (!name) {
298 xattr_type = XATTR_OTHER_T;
299 goto do_getxattr;
300 }
301
302 xattr_type = get_xattr_type(name);
303 rc = xattr_type_filter(sbi, xattr_type);
304 if (rc)
305 return rc;
306
307
308 if ((xattr_type == XATTR_SECURITY_T &&
309 strcmp(name, "security.capability") == 0))
310 return -ENODATA;
311
312
313 if (xattr_type == XATTR_SECURITY_T && !selinux_is_enabled() &&
314 strcmp(name, "security.selinux") == 0)
315 return -EOPNOTSUPP;
316
317#ifdef CONFIG_FS_POSIX_ACL
318 if (sbi->ll_flags & LL_SBI_RMT_CLIENT &&
319 (xattr_type == XATTR_ACL_ACCESS_T ||
320 xattr_type == XATTR_ACL_DEFAULT_T)) {
321 rce = rct_search(&sbi->ll_rct, current_pid());
322 if (rce == NULL ||
323 (rce->rce_ops != RMT_LSETFACL &&
324 rce->rce_ops != RMT_LGETFACL &&
325 rce->rce_ops != RMT_RSETFACL &&
326 rce->rce_ops != RMT_RGETFACL))
327 return -EOPNOTSUPP;
328 }
329
330
331
332
333
334 if (xattr_type == XATTR_ACL_ACCESS_T &&
335 !(sbi->ll_flags & LL_SBI_RMT_CLIENT)) {
336 struct ll_inode_info *lli = ll_i2info(inode);
337 struct posix_acl *acl;
338
339 spin_lock(&lli->lli_lock);
340 acl = posix_acl_dup(lli->lli_posix_acl);
341 spin_unlock(&lli->lli_lock);
342
343 if (!acl)
344 return -ENODATA;
345
346 rc = posix_acl_to_xattr(&init_user_ns, acl, buffer, size);
347 posix_acl_release(acl);
348 return rc;
349 }
350 if (xattr_type == XATTR_ACL_DEFAULT_T && !S_ISDIR(inode->i_mode))
351 return -ENODATA;
352#endif
353
354do_getxattr:
355 oc = ll_mdscapa_get(inode);
356 rc = md_getxattr(sbi->ll_md_exp, ll_inode2fid(inode), oc,
357 valid | (rce ? rce_ops2valid(rce->rce_ops) : 0),
358 name, NULL, 0, size, 0, &req);
359 capa_put(oc);
360 if (rc) {
361 if (rc == -EOPNOTSUPP && xattr_type == XATTR_USER_T) {
362 LCONSOLE_INFO("Disabling user_xattr feature because "
363 "it is not supported on the server\n");
364 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
365 }
366 return rc;
367 }
368
369 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
370 LASSERT(body);
371
372
373 if (size == 0)
374 GOTO(out, rc = body->eadatasize);
375
376 if (size < body->eadatasize) {
377 CERROR("server bug: replied size %u > %u\n",
378 body->eadatasize, (int)size);
379 GOTO(out, rc = -ERANGE);
380 }
381
382 if (body->eadatasize == 0)
383 GOTO(out, rc = -ENODATA);
384
385
386 xdata = req_capsule_server_sized_get(&req->rq_pill, &RMF_EADATA,
387 body->eadatasize);
388 if (!xdata)
389 GOTO(out, rc = -EFAULT);
390
391#ifdef CONFIG_FS_POSIX_ACL
392 if (body->eadatasize >= 0 && rce && rce->rce_ops == RMT_LSETFACL) {
393 ext_acl_xattr_header *acl;
394
395 acl = lustre_posix_acl_xattr_2ext((posix_acl_xattr_header *)xdata,
396 body->eadatasize);
397 if (IS_ERR(acl))
398 GOTO(out, rc = PTR_ERR(acl));
399
400 rc = ee_add(&sbi->ll_et, current_pid(), ll_inode2fid(inode),
401 xattr_type, acl);
402 if (unlikely(rc < 0)) {
403 lustre_ext_acl_xattr_free(acl);
404 GOTO(out, rc);
405 }
406 }
407#endif
408
409 if (body->eadatasize == 0) {
410 rc = -ENODATA;
411 } else {
412 LASSERT(buffer);
413 memcpy(buffer, xdata, body->eadatasize);
414 rc = body->eadatasize;
415 }
416out:
417 ptlrpc_req_finished(req);
418 return rc;
419}
420
421ssize_t ll_getxattr(struct dentry *dentry, const char *name,
422 void *buffer, size_t size)
423{
424 struct inode *inode = dentry->d_inode;
425
426 LASSERT(inode);
427 LASSERT(name);
428
429 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), xattr %s\n",
430 inode->i_ino, inode->i_generation, inode, name);
431
432 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_GETXATTR, 1);
433
434 if ((strncmp(name, XATTR_TRUSTED_PREFIX,
435 sizeof(XATTR_TRUSTED_PREFIX) - 1) == 0 &&
436 strcmp(name + sizeof(XATTR_TRUSTED_PREFIX) - 1, "lov") == 0) ||
437 (strncmp(name, XATTR_LUSTRE_PREFIX,
438 sizeof(XATTR_LUSTRE_PREFIX) - 1) == 0 &&
439 strcmp(name + sizeof(XATTR_LUSTRE_PREFIX) - 1, "lov") == 0)) {
440 struct lov_stripe_md *lsm;
441 struct lov_user_md *lump;
442 struct lov_mds_md *lmm = NULL;
443 struct ptlrpc_request *request = NULL;
444 int rc = 0, lmmsize = 0;
445
446 if (!S_ISREG(inode->i_mode) && !S_ISDIR(inode->i_mode))
447 return -ENODATA;
448
449 if (size == 0 && S_ISDIR(inode->i_mode)) {
450
451
452 GOTO(out, rc = sizeof(struct lov_user_md));
453 }
454
455 lsm = ccc_inode_lsm_get(inode);
456 if (lsm == NULL) {
457 if (S_ISDIR(inode->i_mode)) {
458 rc = ll_dir_getstripe(inode, &lmm,
459 &lmmsize, &request);
460 } else {
461 rc = -ENODATA;
462 }
463 } else {
464
465
466 rc = obd_packmd(ll_i2dtexp(inode), &lmm, lsm);
467 lmmsize = rc;
468 }
469 ccc_inode_lsm_put(inode, lsm);
470
471 if (rc < 0)
472 GOTO(out, rc);
473
474 if (size == 0) {
475
476
477
478
479 rc = lmmsize;
480 GOTO(out, rc);
481 }
482
483 if (size < lmmsize) {
484 CERROR("server bug: replied size %d > %d for %s (%s)\n",
485 lmmsize, (int)size, dentry->d_name.name, name);
486 GOTO(out, rc = -ERANGE);
487 }
488
489 lump = (struct lov_user_md *)buffer;
490 memcpy(lump, lmm, lmmsize);
491
492
493
494 lump->lmm_layout_gen = 0;
495
496 rc = lmmsize;
497out:
498 if (request)
499 ptlrpc_req_finished(request);
500 else if (lmm)
501 obd_free_diskmd(ll_i2dtexp(inode), &lmm);
502 return(rc);
503 }
504
505 return ll_getxattr_common(inode, name, buffer, size, OBD_MD_FLXATTR);
506}
507
508ssize_t ll_listxattr(struct dentry *dentry, char *buffer, size_t size)
509{
510 struct inode *inode = dentry->d_inode;
511 int rc = 0, rc2 = 0;
512 struct lov_mds_md *lmm = NULL;
513 struct ptlrpc_request *request = NULL;
514 int lmmsize;
515
516 LASSERT(inode);
517
518 CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n",
519 inode->i_ino, inode->i_generation, inode);
520
521 ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_LISTXATTR, 1);
522
523 rc = ll_getxattr_common(inode, NULL, buffer, size, OBD_MD_FLXATTRLS);
524 if (rc < 0)
525 GOTO(out, rc);
526
527 if (buffer != NULL) {
528 struct ll_sb_info *sbi = ll_i2sbi(inode);
529 char *xattr_name = buffer;
530 int xlen, rem = rc;
531
532 while (rem > 0) {
533 xlen = strnlen(xattr_name, rem - 1) + 1;
534 rem -= xlen;
535 if (xattr_type_filter(sbi,
536 get_xattr_type(xattr_name)) == 0) {
537
538
539
540 xattr_name += xlen;
541 continue;
542 }
543
544
545
546 memmove(xattr_name, xattr_name + xlen, rem);
547 rc -= xlen;
548 }
549 }
550 if (S_ISREG(inode->i_mode)) {
551 if (!ll_i2info(inode)->lli_has_smd)
552 rc2 = -1;
553 } else if (S_ISDIR(inode->i_mode)) {
554 rc2 = ll_dir_getstripe(inode, &lmm, &lmmsize, &request);
555 }
556
557 if (rc2 < 0) {
558 GOTO(out, rc2 = 0);
559 } else if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)) {
560 const int prefix_len = sizeof(XATTR_LUSTRE_PREFIX) - 1;
561 const size_t name_len = sizeof("lov") - 1;
562 const size_t total_len = prefix_len + name_len + 1;
563
564 if (((rc + total_len) > size) && (buffer != NULL)) {
565 ptlrpc_req_finished(request);
566 return -ERANGE;
567 }
568
569 if (buffer != NULL) {
570 buffer += rc;
571 memcpy(buffer, XATTR_LUSTRE_PREFIX, prefix_len);
572 memcpy(buffer + prefix_len, "lov", name_len);
573 buffer[prefix_len + name_len] = '\0';
574 }
575 rc2 = total_len;
576 }
577out:
578 ptlrpc_req_finished(request);
579 rc = rc + rc2;
580
581 return rc;
582}
583
