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TOMOYO Linux Cross Reference
Linux/fs/ceph/xattr.c

Version: ~ [ linux-5.7 ] ~ [ linux-5.6.15 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.43 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.125 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.182 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.225 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.225 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.84 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 #include <linux/ceph/ceph_debug.h>
  2 #include <linux/ceph/pagelist.h>
  3 
  4 #include "super.h"
  5 #include "mds_client.h"
  6 
  7 #include <linux/ceph/decode.h>
  8 
  9 #include <linux/xattr.h>
 10 #include <linux/posix_acl_xattr.h>
 11 #include <linux/slab.h>
 12 
 13 #define XATTR_CEPH_PREFIX "ceph."
 14 #define XATTR_CEPH_PREFIX_LEN (sizeof (XATTR_CEPH_PREFIX) - 1)
 15 
 16 static int __remove_xattr(struct ceph_inode_info *ci,
 17                           struct ceph_inode_xattr *xattr);
 18 
 19 /*
 20  * List of handlers for synthetic system.* attributes. Other
 21  * attributes are handled directly.
 22  */
 23 const struct xattr_handler *ceph_xattr_handlers[] = {
 24 #ifdef CONFIG_CEPH_FS_POSIX_ACL
 25         &posix_acl_access_xattr_handler,
 26         &posix_acl_default_xattr_handler,
 27 #endif
 28         NULL,
 29 };
 30 
 31 static bool ceph_is_valid_xattr(const char *name)
 32 {
 33         return !strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN) ||
 34                !strncmp(name, XATTR_SECURITY_PREFIX,
 35                         XATTR_SECURITY_PREFIX_LEN) ||
 36                !strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN) ||
 37                !strncmp(name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN) ||
 38                !strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
 39 }
 40 
 41 /*
 42  * These define virtual xattrs exposing the recursive directory
 43  * statistics and layout metadata.
 44  */
 45 struct ceph_vxattr {
 46         char *name;
 47         size_t name_size;       /* strlen(name) + 1 (for '\0') */
 48         size_t (*getxattr_cb)(struct ceph_inode_info *ci, char *val,
 49                               size_t size);
 50         bool readonly, hidden;
 51         bool (*exists_cb)(struct ceph_inode_info *ci);
 52 };
 53 
 54 /* layouts */
 55 
 56 static bool ceph_vxattrcb_layout_exists(struct ceph_inode_info *ci)
 57 {
 58         size_t s;
 59         char *p = (char *)&ci->i_layout;
 60 
 61         for (s = 0; s < sizeof(ci->i_layout); s++, p++)
 62                 if (*p)
 63                         return true;
 64         return false;
 65 }
 66 
 67 static size_t ceph_vxattrcb_layout(struct ceph_inode_info *ci, char *val,
 68                                    size_t size)
 69 {
 70         int ret;
 71         struct ceph_fs_client *fsc = ceph_sb_to_client(ci->vfs_inode.i_sb);
 72         struct ceph_osd_client *osdc = &fsc->client->osdc;
 73         s64 pool = ceph_file_layout_pg_pool(ci->i_layout);
 74         const char *pool_name;
 75         char buf[128];
 76 
 77         dout("ceph_vxattrcb_layout %p\n", &ci->vfs_inode);
 78         down_read(&osdc->map_sem);
 79         pool_name = ceph_pg_pool_name_by_id(osdc->osdmap, pool);
 80         if (pool_name) {
 81                 size_t len = strlen(pool_name);
 82                 ret = snprintf(buf, sizeof(buf),
 83                 "stripe_unit=%lld stripe_count=%lld object_size=%lld pool=",
 84                 (unsigned long long)ceph_file_layout_su(ci->i_layout),
 85                 (unsigned long long)ceph_file_layout_stripe_count(ci->i_layout),
 86                 (unsigned long long)ceph_file_layout_object_size(ci->i_layout));
 87                 if (!size) {
 88                         ret += len;
 89                 } else if (ret + len > size) {
 90                         ret = -ERANGE;
 91                 } else {
 92                         memcpy(val, buf, ret);
 93                         memcpy(val + ret, pool_name, len);
 94                         ret += len;
 95                 }
 96         } else {
 97                 ret = snprintf(buf, sizeof(buf),
 98                 "stripe_unit=%lld stripe_count=%lld object_size=%lld pool=%lld",
 99                 (unsigned long long)ceph_file_layout_su(ci->i_layout),
100                 (unsigned long long)ceph_file_layout_stripe_count(ci->i_layout),
101                 (unsigned long long)ceph_file_layout_object_size(ci->i_layout),
102                 (unsigned long long)pool);
103                 if (size) {
104                         if (ret <= size)
105                                 memcpy(val, buf, ret);
106                         else
107                                 ret = -ERANGE;
108                 }
109         }
110         up_read(&osdc->map_sem);
111         return ret;
112 }
113 
114 static size_t ceph_vxattrcb_layout_stripe_unit(struct ceph_inode_info *ci,
115                                                char *val, size_t size)
116 {
117         return snprintf(val, size, "%lld",
118                         (unsigned long long)ceph_file_layout_su(ci->i_layout));
119 }
120 
121 static size_t ceph_vxattrcb_layout_stripe_count(struct ceph_inode_info *ci,
122                                                 char *val, size_t size)
123 {
124         return snprintf(val, size, "%lld",
125                (unsigned long long)ceph_file_layout_stripe_count(ci->i_layout));
126 }
127 
128 static size_t ceph_vxattrcb_layout_object_size(struct ceph_inode_info *ci,
129                                                char *val, size_t size)
130 {
131         return snprintf(val, size, "%lld",
132                (unsigned long long)ceph_file_layout_object_size(ci->i_layout));
133 }
134 
135 static size_t ceph_vxattrcb_layout_pool(struct ceph_inode_info *ci,
136                                         char *val, size_t size)
137 {
138         int ret;
139         struct ceph_fs_client *fsc = ceph_sb_to_client(ci->vfs_inode.i_sb);
140         struct ceph_osd_client *osdc = &fsc->client->osdc;
141         s64 pool = ceph_file_layout_pg_pool(ci->i_layout);
142         const char *pool_name;
143 
144         down_read(&osdc->map_sem);
145         pool_name = ceph_pg_pool_name_by_id(osdc->osdmap, pool);
146         if (pool_name)
147                 ret = snprintf(val, size, "%s", pool_name);
148         else
149                 ret = snprintf(val, size, "%lld", (unsigned long long)pool);
150         up_read(&osdc->map_sem);
151         return ret;
152 }
153 
154 /* directories */
155 
156 static size_t ceph_vxattrcb_dir_entries(struct ceph_inode_info *ci, char *val,
157                                         size_t size)
158 {
159         return snprintf(val, size, "%lld", ci->i_files + ci->i_subdirs);
160 }
161 
162 static size_t ceph_vxattrcb_dir_files(struct ceph_inode_info *ci, char *val,
163                                       size_t size)
164 {
165         return snprintf(val, size, "%lld", ci->i_files);
166 }
167 
168 static size_t ceph_vxattrcb_dir_subdirs(struct ceph_inode_info *ci, char *val,
169                                         size_t size)
170 {
171         return snprintf(val, size, "%lld", ci->i_subdirs);
172 }
173 
174 static size_t ceph_vxattrcb_dir_rentries(struct ceph_inode_info *ci, char *val,
175                                          size_t size)
176 {
177         return snprintf(val, size, "%lld", ci->i_rfiles + ci->i_rsubdirs);
178 }
179 
180 static size_t ceph_vxattrcb_dir_rfiles(struct ceph_inode_info *ci, char *val,
181                                        size_t size)
182 {
183         return snprintf(val, size, "%lld", ci->i_rfiles);
184 }
185 
186 static size_t ceph_vxattrcb_dir_rsubdirs(struct ceph_inode_info *ci, char *val,
187                                          size_t size)
188 {
189         return snprintf(val, size, "%lld", ci->i_rsubdirs);
190 }
191 
192 static size_t ceph_vxattrcb_dir_rbytes(struct ceph_inode_info *ci, char *val,
193                                        size_t size)
194 {
195         return snprintf(val, size, "%lld", ci->i_rbytes);
196 }
197 
198 static size_t ceph_vxattrcb_dir_rctime(struct ceph_inode_info *ci, char *val,
199                                        size_t size)
200 {
201         return snprintf(val, size, "%ld.09%ld", (long)ci->i_rctime.tv_sec,
202                         (long)ci->i_rctime.tv_nsec);
203 }
204 
205 
206 #define CEPH_XATTR_NAME(_type, _name)   XATTR_CEPH_PREFIX #_type "." #_name
207 #define CEPH_XATTR_NAME2(_type, _name, _name2)  \
208         XATTR_CEPH_PREFIX #_type "." #_name "." #_name2
209 
210 #define XATTR_NAME_CEPH(_type, _name)                                   \
211         {                                                               \
212                 .name = CEPH_XATTR_NAME(_type, _name),                  \
213                 .name_size = sizeof (CEPH_XATTR_NAME(_type, _name)), \
214                 .getxattr_cb = ceph_vxattrcb_ ## _type ## _ ## _name, \
215                 .readonly = true,                               \
216                 .hidden = false,                                \
217                 .exists_cb = NULL,                      \
218         }
219 #define XATTR_LAYOUT_FIELD(_type, _name, _field)                        \
220         {                                                               \
221                 .name = CEPH_XATTR_NAME2(_type, _name, _field), \
222                 .name_size = sizeof (CEPH_XATTR_NAME2(_type, _name, _field)), \
223                 .getxattr_cb = ceph_vxattrcb_ ## _name ## _ ## _field, \
224                 .readonly = false,                              \
225                 .hidden = true,                 \
226                 .exists_cb = ceph_vxattrcb_layout_exists,       \
227         }
228 
229 static struct ceph_vxattr ceph_dir_vxattrs[] = {
230         {
231                 .name = "ceph.dir.layout",
232                 .name_size = sizeof("ceph.dir.layout"),
233                 .getxattr_cb = ceph_vxattrcb_layout,
234                 .readonly = false,
235                 .hidden = true,
236                 .exists_cb = ceph_vxattrcb_layout_exists,
237         },
238         XATTR_LAYOUT_FIELD(dir, layout, stripe_unit),
239         XATTR_LAYOUT_FIELD(dir, layout, stripe_count),
240         XATTR_LAYOUT_FIELD(dir, layout, object_size),
241         XATTR_LAYOUT_FIELD(dir, layout, pool),
242         XATTR_NAME_CEPH(dir, entries),
243         XATTR_NAME_CEPH(dir, files),
244         XATTR_NAME_CEPH(dir, subdirs),
245         XATTR_NAME_CEPH(dir, rentries),
246         XATTR_NAME_CEPH(dir, rfiles),
247         XATTR_NAME_CEPH(dir, rsubdirs),
248         XATTR_NAME_CEPH(dir, rbytes),
249         XATTR_NAME_CEPH(dir, rctime),
250         { .name = NULL, 0 }     /* Required table terminator */
251 };
252 static size_t ceph_dir_vxattrs_name_size;       /* total size of all names */
253 
254 /* files */
255 
256 static struct ceph_vxattr ceph_file_vxattrs[] = {
257         {
258                 .name = "ceph.file.layout",
259                 .name_size = sizeof("ceph.file.layout"),
260                 .getxattr_cb = ceph_vxattrcb_layout,
261                 .readonly = false,
262                 .hidden = true,
263                 .exists_cb = ceph_vxattrcb_layout_exists,
264         },
265         XATTR_LAYOUT_FIELD(file, layout, stripe_unit),
266         XATTR_LAYOUT_FIELD(file, layout, stripe_count),
267         XATTR_LAYOUT_FIELD(file, layout, object_size),
268         XATTR_LAYOUT_FIELD(file, layout, pool),
269         { .name = NULL, 0 }     /* Required table terminator */
270 };
271 static size_t ceph_file_vxattrs_name_size;      /* total size of all names */
272 
273 static struct ceph_vxattr *ceph_inode_vxattrs(struct inode *inode)
274 {
275         if (S_ISDIR(inode->i_mode))
276                 return ceph_dir_vxattrs;
277         else if (S_ISREG(inode->i_mode))
278                 return ceph_file_vxattrs;
279         return NULL;
280 }
281 
282 static size_t ceph_vxattrs_name_size(struct ceph_vxattr *vxattrs)
283 {
284         if (vxattrs == ceph_dir_vxattrs)
285                 return ceph_dir_vxattrs_name_size;
286         if (vxattrs == ceph_file_vxattrs)
287                 return ceph_file_vxattrs_name_size;
288         BUG_ON(vxattrs);
289         return 0;
290 }
291 
292 /*
293  * Compute the aggregate size (including terminating '\0') of all
294  * virtual extended attribute names in the given vxattr table.
295  */
296 static size_t __init vxattrs_name_size(struct ceph_vxattr *vxattrs)
297 {
298         struct ceph_vxattr *vxattr;
299         size_t size = 0;
300 
301         for (vxattr = vxattrs; vxattr->name; vxattr++)
302                 if (!vxattr->hidden)
303                         size += vxattr->name_size;
304 
305         return size;
306 }
307 
308 /* Routines called at initialization and exit time */
309 
310 void __init ceph_xattr_init(void)
311 {
312         ceph_dir_vxattrs_name_size = vxattrs_name_size(ceph_dir_vxattrs);
313         ceph_file_vxattrs_name_size = vxattrs_name_size(ceph_file_vxattrs);
314 }
315 
316 void ceph_xattr_exit(void)
317 {
318         ceph_dir_vxattrs_name_size = 0;
319         ceph_file_vxattrs_name_size = 0;
320 }
321 
322 static struct ceph_vxattr *ceph_match_vxattr(struct inode *inode,
323                                                 const char *name)
324 {
325         struct ceph_vxattr *vxattr = ceph_inode_vxattrs(inode);
326 
327         if (vxattr) {
328                 while (vxattr->name) {
329                         if (!strcmp(vxattr->name, name))
330                                 return vxattr;
331                         vxattr++;
332                 }
333         }
334 
335         return NULL;
336 }
337 
338 static int __set_xattr(struct ceph_inode_info *ci,
339                            const char *name, int name_len,
340                            const char *val, int val_len,
341                            int flags, int update_xattr,
342                            struct ceph_inode_xattr **newxattr)
343 {
344         struct rb_node **p;
345         struct rb_node *parent = NULL;
346         struct ceph_inode_xattr *xattr = NULL;
347         int c;
348         int new = 0;
349 
350         p = &ci->i_xattrs.index.rb_node;
351         while (*p) {
352                 parent = *p;
353                 xattr = rb_entry(parent, struct ceph_inode_xattr, node);
354                 c = strncmp(name, xattr->name, min(name_len, xattr->name_len));
355                 if (c < 0)
356                         p = &(*p)->rb_left;
357                 else if (c > 0)
358                         p = &(*p)->rb_right;
359                 else {
360                         if (name_len == xattr->name_len)
361                                 break;
362                         else if (name_len < xattr->name_len)
363                                 p = &(*p)->rb_left;
364                         else
365                                 p = &(*p)->rb_right;
366                 }
367                 xattr = NULL;
368         }
369 
370         if (update_xattr) {
371                 int err = 0;
372                 if (xattr && (flags & XATTR_CREATE))
373                         err = -EEXIST;
374                 else if (!xattr && (flags & XATTR_REPLACE))
375                         err = -ENODATA;
376                 if (err) {
377                         kfree(name);
378                         kfree(val);
379                         return err;
380                 }
381                 if (update_xattr < 0) {
382                         if (xattr)
383                                 __remove_xattr(ci, xattr);
384                         kfree(name);
385                         return 0;
386                 }
387         }
388 
389         if (!xattr) {
390                 new = 1;
391                 xattr = *newxattr;
392                 xattr->name = name;
393                 xattr->name_len = name_len;
394                 xattr->should_free_name = update_xattr;
395 
396                 ci->i_xattrs.count++;
397                 dout("__set_xattr count=%d\n", ci->i_xattrs.count);
398         } else {
399                 kfree(*newxattr);
400                 *newxattr = NULL;
401                 if (xattr->should_free_val)
402                         kfree((void *)xattr->val);
403 
404                 if (update_xattr) {
405                         kfree((void *)name);
406                         name = xattr->name;
407                 }
408                 ci->i_xattrs.names_size -= xattr->name_len;
409                 ci->i_xattrs.vals_size -= xattr->val_len;
410         }
411         ci->i_xattrs.names_size += name_len;
412         ci->i_xattrs.vals_size += val_len;
413         if (val)
414                 xattr->val = val;
415         else
416                 xattr->val = "";
417 
418         xattr->val_len = val_len;
419         xattr->dirty = update_xattr;
420         xattr->should_free_val = (val && update_xattr);
421 
422         if (new) {
423                 rb_link_node(&xattr->node, parent, p);
424                 rb_insert_color(&xattr->node, &ci->i_xattrs.index);
425                 dout("__set_xattr_val p=%p\n", p);
426         }
427 
428         dout("__set_xattr_val added %llx.%llx xattr %p %s=%.*s\n",
429              ceph_vinop(&ci->vfs_inode), xattr, name, val_len, val);
430 
431         return 0;
432 }
433 
434 static struct ceph_inode_xattr *__get_xattr(struct ceph_inode_info *ci,
435                            const char *name)
436 {
437         struct rb_node **p;
438         struct rb_node *parent = NULL;
439         struct ceph_inode_xattr *xattr = NULL;
440         int name_len = strlen(name);
441         int c;
442 
443         p = &ci->i_xattrs.index.rb_node;
444         while (*p) {
445                 parent = *p;
446                 xattr = rb_entry(parent, struct ceph_inode_xattr, node);
447                 c = strncmp(name, xattr->name, xattr->name_len);
448                 if (c == 0 && name_len > xattr->name_len)
449                         c = 1;
450                 if (c < 0)
451                         p = &(*p)->rb_left;
452                 else if (c > 0)
453                         p = &(*p)->rb_right;
454                 else {
455                         dout("__get_xattr %s: found %.*s\n", name,
456                              xattr->val_len, xattr->val);
457                         return xattr;
458                 }
459         }
460 
461         dout("__get_xattr %s: not found\n", name);
462 
463         return NULL;
464 }
465 
466 static void __free_xattr(struct ceph_inode_xattr *xattr)
467 {
468         BUG_ON(!xattr);
469 
470         if (xattr->should_free_name)
471                 kfree((void *)xattr->name);
472         if (xattr->should_free_val)
473                 kfree((void *)xattr->val);
474 
475         kfree(xattr);
476 }
477 
478 static int __remove_xattr(struct ceph_inode_info *ci,
479                           struct ceph_inode_xattr *xattr)
480 {
481         if (!xattr)
482                 return -ENODATA;
483 
484         rb_erase(&xattr->node, &ci->i_xattrs.index);
485 
486         if (xattr->should_free_name)
487                 kfree((void *)xattr->name);
488         if (xattr->should_free_val)
489                 kfree((void *)xattr->val);
490 
491         ci->i_xattrs.names_size -= xattr->name_len;
492         ci->i_xattrs.vals_size -= xattr->val_len;
493         ci->i_xattrs.count--;
494         kfree(xattr);
495 
496         return 0;
497 }
498 
499 static int __remove_xattr_by_name(struct ceph_inode_info *ci,
500                            const char *name)
501 {
502         struct rb_node **p;
503         struct ceph_inode_xattr *xattr;
504         int err;
505 
506         p = &ci->i_xattrs.index.rb_node;
507         xattr = __get_xattr(ci, name);
508         err = __remove_xattr(ci, xattr);
509         return err;
510 }
511 
512 static char *__copy_xattr_names(struct ceph_inode_info *ci,
513                                 char *dest)
514 {
515         struct rb_node *p;
516         struct ceph_inode_xattr *xattr = NULL;
517 
518         p = rb_first(&ci->i_xattrs.index);
519         dout("__copy_xattr_names count=%d\n", ci->i_xattrs.count);
520 
521         while (p) {
522                 xattr = rb_entry(p, struct ceph_inode_xattr, node);
523                 memcpy(dest, xattr->name, xattr->name_len);
524                 dest[xattr->name_len] = '\0';
525 
526                 dout("dest=%s %p (%s) (%d/%d)\n", dest, xattr, xattr->name,
527                      xattr->name_len, ci->i_xattrs.names_size);
528 
529                 dest += xattr->name_len + 1;
530                 p = rb_next(p);
531         }
532 
533         return dest;
534 }
535 
536 void __ceph_destroy_xattrs(struct ceph_inode_info *ci)
537 {
538         struct rb_node *p, *tmp;
539         struct ceph_inode_xattr *xattr = NULL;
540 
541         p = rb_first(&ci->i_xattrs.index);
542 
543         dout("__ceph_destroy_xattrs p=%p\n", p);
544 
545         while (p) {
546                 xattr = rb_entry(p, struct ceph_inode_xattr, node);
547                 tmp = p;
548                 p = rb_next(tmp);
549                 dout("__ceph_destroy_xattrs next p=%p (%.*s)\n", p,
550                      xattr->name_len, xattr->name);
551                 rb_erase(tmp, &ci->i_xattrs.index);
552 
553                 __free_xattr(xattr);
554         }
555 
556         ci->i_xattrs.names_size = 0;
557         ci->i_xattrs.vals_size = 0;
558         ci->i_xattrs.index_version = 0;
559         ci->i_xattrs.count = 0;
560         ci->i_xattrs.index = RB_ROOT;
561 }
562 
563 static int __build_xattrs(struct inode *inode)
564         __releases(ci->i_ceph_lock)
565         __acquires(ci->i_ceph_lock)
566 {
567         u32 namelen;
568         u32 numattr = 0;
569         void *p, *end;
570         u32 len;
571         const char *name, *val;
572         struct ceph_inode_info *ci = ceph_inode(inode);
573         int xattr_version;
574         struct ceph_inode_xattr **xattrs = NULL;
575         int err = 0;
576         int i;
577 
578         dout("__build_xattrs() len=%d\n",
579              ci->i_xattrs.blob ? (int)ci->i_xattrs.blob->vec.iov_len : 0);
580 
581         if (ci->i_xattrs.index_version >= ci->i_xattrs.version)
582                 return 0; /* already built */
583 
584         __ceph_destroy_xattrs(ci);
585 
586 start:
587         /* updated internal xattr rb tree */
588         if (ci->i_xattrs.blob && ci->i_xattrs.blob->vec.iov_len > 4) {
589                 p = ci->i_xattrs.blob->vec.iov_base;
590                 end = p + ci->i_xattrs.blob->vec.iov_len;
591                 ceph_decode_32_safe(&p, end, numattr, bad);
592                 xattr_version = ci->i_xattrs.version;
593                 spin_unlock(&ci->i_ceph_lock);
594 
595                 xattrs = kcalloc(numattr, sizeof(struct ceph_inode_xattr *),
596                                  GFP_NOFS);
597                 err = -ENOMEM;
598                 if (!xattrs)
599                         goto bad_lock;
600 
601                 for (i = 0; i < numattr; i++) {
602                         xattrs[i] = kmalloc(sizeof(struct ceph_inode_xattr),
603                                             GFP_NOFS);
604                         if (!xattrs[i])
605                                 goto bad_lock;
606                 }
607 
608                 spin_lock(&ci->i_ceph_lock);
609                 if (ci->i_xattrs.version != xattr_version) {
610                         /* lost a race, retry */
611                         for (i = 0; i < numattr; i++)
612                                 kfree(xattrs[i]);
613                         kfree(xattrs);
614                         xattrs = NULL;
615                         goto start;
616                 }
617                 err = -EIO;
618                 while (numattr--) {
619                         ceph_decode_32_safe(&p, end, len, bad);
620                         namelen = len;
621                         name = p;
622                         p += len;
623                         ceph_decode_32_safe(&p, end, len, bad);
624                         val = p;
625                         p += len;
626 
627                         err = __set_xattr(ci, name, namelen, val, len,
628                                           0, 0, &xattrs[numattr]);
629 
630                         if (err < 0)
631                                 goto bad;
632                 }
633                 kfree(xattrs);
634         }
635         ci->i_xattrs.index_version = ci->i_xattrs.version;
636         ci->i_xattrs.dirty = false;
637 
638         return err;
639 bad_lock:
640         spin_lock(&ci->i_ceph_lock);
641 bad:
642         if (xattrs) {
643                 for (i = 0; i < numattr; i++)
644                         kfree(xattrs[i]);
645                 kfree(xattrs);
646         }
647         ci->i_xattrs.names_size = 0;
648         return err;
649 }
650 
651 static int __get_required_blob_size(struct ceph_inode_info *ci, int name_size,
652                                     int val_size)
653 {
654         /*
655          * 4 bytes for the length, and additional 4 bytes per each xattr name,
656          * 4 bytes per each value
657          */
658         int size = 4 + ci->i_xattrs.count*(4 + 4) +
659                              ci->i_xattrs.names_size +
660                              ci->i_xattrs.vals_size;
661         dout("__get_required_blob_size c=%d names.size=%d vals.size=%d\n",
662              ci->i_xattrs.count, ci->i_xattrs.names_size,
663              ci->i_xattrs.vals_size);
664 
665         if (name_size)
666                 size += 4 + 4 + name_size + val_size;
667 
668         return size;
669 }
670 
671 /*
672  * If there are dirty xattrs, reencode xattrs into the prealloc_blob
673  * and swap into place.
674  */
675 void __ceph_build_xattrs_blob(struct ceph_inode_info *ci)
676 {
677         struct rb_node *p;
678         struct ceph_inode_xattr *xattr = NULL;
679         void *dest;
680 
681         dout("__build_xattrs_blob %p\n", &ci->vfs_inode);
682         if (ci->i_xattrs.dirty) {
683                 int need = __get_required_blob_size(ci, 0, 0);
684 
685                 BUG_ON(need > ci->i_xattrs.prealloc_blob->alloc_len);
686 
687                 p = rb_first(&ci->i_xattrs.index);
688                 dest = ci->i_xattrs.prealloc_blob->vec.iov_base;
689 
690                 ceph_encode_32(&dest, ci->i_xattrs.count);
691                 while (p) {
692                         xattr = rb_entry(p, struct ceph_inode_xattr, node);
693 
694                         ceph_encode_32(&dest, xattr->name_len);
695                         memcpy(dest, xattr->name, xattr->name_len);
696                         dest += xattr->name_len;
697                         ceph_encode_32(&dest, xattr->val_len);
698                         memcpy(dest, xattr->val, xattr->val_len);
699                         dest += xattr->val_len;
700 
701                         p = rb_next(p);
702                 }
703 
704                 /* adjust buffer len; it may be larger than we need */
705                 ci->i_xattrs.prealloc_blob->vec.iov_len =
706                         dest - ci->i_xattrs.prealloc_blob->vec.iov_base;
707 
708                 if (ci->i_xattrs.blob)
709                         ceph_buffer_put(ci->i_xattrs.blob);
710                 ci->i_xattrs.blob = ci->i_xattrs.prealloc_blob;
711                 ci->i_xattrs.prealloc_blob = NULL;
712                 ci->i_xattrs.dirty = false;
713                 ci->i_xattrs.version++;
714         }
715 }
716 
717 static inline int __get_request_mask(struct inode *in) {
718         struct ceph_mds_request *req = current->journal_info;
719         int mask = 0;
720         if (req && req->r_target_inode == in) {
721                 if (req->r_op == CEPH_MDS_OP_LOOKUP ||
722                     req->r_op == CEPH_MDS_OP_LOOKUPINO ||
723                     req->r_op == CEPH_MDS_OP_LOOKUPPARENT ||
724                     req->r_op == CEPH_MDS_OP_GETATTR) {
725                         mask = le32_to_cpu(req->r_args.getattr.mask);
726                 } else if (req->r_op == CEPH_MDS_OP_OPEN ||
727                            req->r_op == CEPH_MDS_OP_CREATE) {
728                         mask = le32_to_cpu(req->r_args.open.mask);
729                 }
730         }
731         return mask;
732 }
733 
734 ssize_t __ceph_getxattr(struct inode *inode, const char *name, void *value,
735                       size_t size)
736 {
737         struct ceph_inode_info *ci = ceph_inode(inode);
738         struct ceph_inode_xattr *xattr;
739         struct ceph_vxattr *vxattr = NULL;
740         int req_mask;
741         int err;
742 
743         if (!ceph_is_valid_xattr(name))
744                 return -ENODATA;
745 
746         /* let's see if a virtual xattr was requested */
747         vxattr = ceph_match_vxattr(inode, name);
748         if (vxattr) {
749                 err = -ENODATA;
750                 if (!(vxattr->exists_cb && !vxattr->exists_cb(ci)))
751                         err = vxattr->getxattr_cb(ci, value, size);
752                 return err;
753         }
754 
755         req_mask = __get_request_mask(inode);
756 
757         spin_lock(&ci->i_ceph_lock);
758         dout("getxattr %p ver=%lld index_ver=%lld\n", inode,
759              ci->i_xattrs.version, ci->i_xattrs.index_version);
760 
761         if (ci->i_xattrs.version == 0 ||
762             !((req_mask & CEPH_CAP_XATTR_SHARED) ||
763               __ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 1))) {
764                 spin_unlock(&ci->i_ceph_lock);
765 
766                 /* security module gets xattr while filling trace */
767                 if (current->journal_info != NULL) {
768                         pr_warn_ratelimited("sync getxattr %p "
769                                             "during filling trace\n", inode);
770                         return -EBUSY;
771                 }
772 
773                 /* get xattrs from mds (if we don't already have them) */
774                 err = ceph_do_getattr(inode, CEPH_STAT_CAP_XATTR, true);
775                 if (err)
776                         return err;
777                 spin_lock(&ci->i_ceph_lock);
778         }
779 
780         err = __build_xattrs(inode);
781         if (err < 0)
782                 goto out;
783 
784         err = -ENODATA;  /* == ENOATTR */
785         xattr = __get_xattr(ci, name);
786         if (!xattr)
787                 goto out;
788 
789         err = -ERANGE;
790         if (size && size < xattr->val_len)
791                 goto out;
792 
793         err = xattr->val_len;
794         if (size == 0)
795                 goto out;
796 
797         memcpy(value, xattr->val, xattr->val_len);
798 
799         if (current->journal_info != NULL &&
800             !strncmp(name, XATTR_SECURITY_PREFIX, XATTR_SECURITY_PREFIX_LEN))
801                 ci->i_ceph_flags |= CEPH_I_SEC_INITED;
802 out:
803         spin_unlock(&ci->i_ceph_lock);
804         return err;
805 }
806 
807 ssize_t ceph_getxattr(struct dentry *dentry, const char *name, void *value,
808                       size_t size)
809 {
810         if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN))
811                 return generic_getxattr(dentry, name, value, size);
812 
813         return __ceph_getxattr(d_inode(dentry), name, value, size);
814 }
815 
816 ssize_t ceph_listxattr(struct dentry *dentry, char *names, size_t size)
817 {
818         struct inode *inode = d_inode(dentry);
819         struct ceph_inode_info *ci = ceph_inode(inode);
820         struct ceph_vxattr *vxattrs = ceph_inode_vxattrs(inode);
821         u32 vir_namelen = 0;
822         u32 namelen;
823         int err;
824         u32 len;
825         int i;
826 
827         spin_lock(&ci->i_ceph_lock);
828         dout("listxattr %p ver=%lld index_ver=%lld\n", inode,
829              ci->i_xattrs.version, ci->i_xattrs.index_version);
830 
831         if (ci->i_xattrs.version == 0 ||
832             !__ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 1)) {
833                 spin_unlock(&ci->i_ceph_lock);
834                 err = ceph_do_getattr(inode, CEPH_STAT_CAP_XATTR, true);
835                 if (err)
836                         return err;
837                 spin_lock(&ci->i_ceph_lock);
838         }
839 
840         err = __build_xattrs(inode);
841         if (err < 0)
842                 goto out;
843         /*
844          * Start with virtual dir xattr names (if any) (including
845          * terminating '\0' characters for each).
846          */
847         vir_namelen = ceph_vxattrs_name_size(vxattrs);
848 
849         /* adding 1 byte per each variable due to the null termination */
850         namelen = ci->i_xattrs.names_size + ci->i_xattrs.count;
851         err = -ERANGE;
852         if (size && vir_namelen + namelen > size)
853                 goto out;
854 
855         err = namelen + vir_namelen;
856         if (size == 0)
857                 goto out;
858 
859         names = __copy_xattr_names(ci, names);
860 
861         /* virtual xattr names, too */
862         err = namelen;
863         if (vxattrs) {
864                 for (i = 0; vxattrs[i].name; i++) {
865                         if (!vxattrs[i].hidden &&
866                             !(vxattrs[i].exists_cb &&
867                               !vxattrs[i].exists_cb(ci))) {
868                                 len = sprintf(names, "%s", vxattrs[i].name);
869                                 names += len + 1;
870                                 err += len + 1;
871                         }
872                 }
873         }
874 
875 out:
876         spin_unlock(&ci->i_ceph_lock);
877         return err;
878 }
879 
880 static int ceph_sync_setxattr(struct dentry *dentry, const char *name,
881                               const char *value, size_t size, int flags)
882 {
883         struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb);
884         struct inode *inode = d_inode(dentry);
885         struct ceph_inode_info *ci = ceph_inode(inode);
886         struct ceph_mds_request *req;
887         struct ceph_mds_client *mdsc = fsc->mdsc;
888         struct ceph_pagelist *pagelist = NULL;
889         int err;
890 
891         if (size > 0) {
892                 /* copy value into pagelist */
893                 pagelist = kmalloc(sizeof(*pagelist), GFP_NOFS);
894                 if (!pagelist)
895                         return -ENOMEM;
896 
897                 ceph_pagelist_init(pagelist);
898                 err = ceph_pagelist_append(pagelist, value, size);
899                 if (err)
900                         goto out;
901         } else if (!value) {
902                 flags |= CEPH_XATTR_REMOVE;
903         }
904 
905         dout("setxattr value=%.*s\n", (int)size, value);
906 
907         /* do request */
908         req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETXATTR,
909                                        USE_AUTH_MDS);
910         if (IS_ERR(req)) {
911                 err = PTR_ERR(req);
912                 goto out;
913         }
914 
915         req->r_args.setxattr.flags = cpu_to_le32(flags);
916         req->r_path2 = kstrdup(name, GFP_NOFS);
917         if (!req->r_path2) {
918                 ceph_mdsc_put_request(req);
919                 err = -ENOMEM;
920                 goto out;
921         }
922 
923         req->r_pagelist = pagelist;
924         pagelist = NULL;
925 
926         req->r_inode = inode;
927         ihold(inode);
928         req->r_num_caps = 1;
929         req->r_inode_drop = CEPH_CAP_XATTR_SHARED;
930 
931         dout("xattr.ver (before): %lld\n", ci->i_xattrs.version);
932         err = ceph_mdsc_do_request(mdsc, NULL, req);
933         ceph_mdsc_put_request(req);
934         dout("xattr.ver (after): %lld\n", ci->i_xattrs.version);
935 
936 out:
937         if (pagelist)
938                 ceph_pagelist_release(pagelist);
939         return err;
940 }
941 
942 int __ceph_setxattr(struct dentry *dentry, const char *name,
943                         const void *value, size_t size, int flags)
944 {
945         struct inode *inode = d_inode(dentry);
946         struct ceph_vxattr *vxattr;
947         struct ceph_inode_info *ci = ceph_inode(inode);
948         struct ceph_mds_client *mdsc = ceph_sb_to_client(dentry->d_sb)->mdsc;
949         struct ceph_cap_flush *prealloc_cf = NULL;
950         int issued;
951         int err;
952         int dirty = 0;
953         int name_len = strlen(name);
954         int val_len = size;
955         char *newname = NULL;
956         char *newval = NULL;
957         struct ceph_inode_xattr *xattr = NULL;
958         int required_blob_size;
959         bool lock_snap_rwsem = false;
960 
961         if (!ceph_is_valid_xattr(name))
962                 return -EOPNOTSUPP;
963 
964         vxattr = ceph_match_vxattr(inode, name);
965         if (vxattr && vxattr->readonly)
966                 return -EOPNOTSUPP;
967 
968         /* pass any unhandled ceph.* xattrs through to the MDS */
969         if (!strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN))
970                 goto do_sync_unlocked;
971 
972         /* preallocate memory for xattr name, value, index node */
973         err = -ENOMEM;
974         newname = kmemdup(name, name_len + 1, GFP_NOFS);
975         if (!newname)
976                 goto out;
977 
978         if (val_len) {
979                 newval = kmemdup(value, val_len, GFP_NOFS);
980                 if (!newval)
981                         goto out;
982         }
983 
984         xattr = kmalloc(sizeof(struct ceph_inode_xattr), GFP_NOFS);
985         if (!xattr)
986                 goto out;
987 
988         prealloc_cf = ceph_alloc_cap_flush();
989         if (!prealloc_cf)
990                 goto out;
991 
992         spin_lock(&ci->i_ceph_lock);
993 retry:
994         issued = __ceph_caps_issued(ci, NULL);
995         if (ci->i_xattrs.version == 0 || !(issued & CEPH_CAP_XATTR_EXCL))
996                 goto do_sync;
997 
998         if (!lock_snap_rwsem && !ci->i_head_snapc) {
999                 lock_snap_rwsem = true;
1000                 if (!down_read_trylock(&mdsc->snap_rwsem)) {
1001                         spin_unlock(&ci->i_ceph_lock);
1002                         down_read(&mdsc->snap_rwsem);
1003                         spin_lock(&ci->i_ceph_lock);
1004                         goto retry;
1005                 }
1006         }
1007 
1008         dout("setxattr %p issued %s\n", inode, ceph_cap_string(issued));
1009         __build_xattrs(inode);
1010 
1011         required_blob_size = __get_required_blob_size(ci, name_len, val_len);
1012 
1013         if (!ci->i_xattrs.prealloc_blob ||
1014             required_blob_size > ci->i_xattrs.prealloc_blob->alloc_len) {
1015                 struct ceph_buffer *blob;
1016 
1017                 spin_unlock(&ci->i_ceph_lock);
1018                 dout(" preaallocating new blob size=%d\n", required_blob_size);
1019                 blob = ceph_buffer_new(required_blob_size, GFP_NOFS);
1020                 if (!blob)
1021                         goto do_sync_unlocked;
1022                 spin_lock(&ci->i_ceph_lock);
1023                 if (ci->i_xattrs.prealloc_blob)
1024                         ceph_buffer_put(ci->i_xattrs.prealloc_blob);
1025                 ci->i_xattrs.prealloc_blob = blob;
1026                 goto retry;
1027         }
1028 
1029         err = __set_xattr(ci, newname, name_len, newval, val_len,
1030                           flags, value ? 1 : -1, &xattr);
1031 
1032         if (!err) {
1033                 dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_XATTR_EXCL,
1034                                                &prealloc_cf);
1035                 ci->i_xattrs.dirty = true;
1036                 inode->i_ctime = current_fs_time(inode->i_sb);
1037         }
1038 
1039         spin_unlock(&ci->i_ceph_lock);
1040         if (lock_snap_rwsem)
1041                 up_read(&mdsc->snap_rwsem);
1042         if (dirty)
1043                 __mark_inode_dirty(inode, dirty);
1044         ceph_free_cap_flush(prealloc_cf);
1045         return err;
1046 
1047 do_sync:
1048         spin_unlock(&ci->i_ceph_lock);
1049 do_sync_unlocked:
1050         if (lock_snap_rwsem)
1051                 up_read(&mdsc->snap_rwsem);
1052 
1053         /* security module set xattr while filling trace */
1054         if (current->journal_info != NULL) {
1055                 pr_warn_ratelimited("sync setxattr %p "
1056                                     "during filling trace\n", inode);
1057                 err = -EBUSY;
1058         } else {
1059                 err = ceph_sync_setxattr(dentry, name, value, size, flags);
1060         }
1061 out:
1062         ceph_free_cap_flush(prealloc_cf);
1063         kfree(newname);
1064         kfree(newval);
1065         kfree(xattr);
1066         return err;
1067 }
1068 
1069 int ceph_setxattr(struct dentry *dentry, const char *name,
1070                   const void *value, size_t size, int flags)
1071 {
1072         if (ceph_snap(d_inode(dentry)) != CEPH_NOSNAP)
1073                 return -EROFS;
1074 
1075         if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN))
1076                 return generic_setxattr(dentry, name, value, size, flags);
1077 
1078         if (size == 0)
1079                 value = "";  /* empty EA, do not remove */
1080 
1081         return __ceph_setxattr(dentry, name, value, size, flags);
1082 }
1083 
1084 static int ceph_send_removexattr(struct dentry *dentry, const char *name)
1085 {
1086         struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb);
1087         struct ceph_mds_client *mdsc = fsc->mdsc;
1088         struct inode *inode = d_inode(dentry);
1089         struct ceph_mds_request *req;
1090         int err;
1091 
1092         req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_RMXATTR,
1093                                        USE_AUTH_MDS);
1094         if (IS_ERR(req))
1095                 return PTR_ERR(req);
1096         req->r_path2 = kstrdup(name, GFP_NOFS);
1097         if (!req->r_path2)
1098                 return -ENOMEM;
1099 
1100         req->r_inode = inode;
1101         ihold(inode);
1102         req->r_num_caps = 1;
1103         req->r_inode_drop = CEPH_CAP_XATTR_SHARED;
1104         err = ceph_mdsc_do_request(mdsc, NULL, req);
1105         ceph_mdsc_put_request(req);
1106         return err;
1107 }
1108 
1109 int __ceph_removexattr(struct dentry *dentry, const char *name)
1110 {
1111         struct inode *inode = d_inode(dentry);
1112         struct ceph_vxattr *vxattr;
1113         struct ceph_inode_info *ci = ceph_inode(inode);
1114         struct ceph_mds_client *mdsc = ceph_sb_to_client(dentry->d_sb)->mdsc;
1115         struct ceph_cap_flush *prealloc_cf = NULL;
1116         int issued;
1117         int err;
1118         int required_blob_size;
1119         int dirty;
1120         bool lock_snap_rwsem = false;
1121 
1122         if (!ceph_is_valid_xattr(name))
1123                 return -EOPNOTSUPP;
1124 
1125         vxattr = ceph_match_vxattr(inode, name);
1126         if (vxattr && vxattr->readonly)
1127                 return -EOPNOTSUPP;
1128 
1129         /* pass any unhandled ceph.* xattrs through to the MDS */
1130         if (!strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN))
1131                 goto do_sync_unlocked;
1132 
1133         prealloc_cf = ceph_alloc_cap_flush();
1134         if (!prealloc_cf)
1135                 return -ENOMEM;
1136 
1137         err = -ENOMEM;
1138         spin_lock(&ci->i_ceph_lock);
1139 retry:
1140         issued = __ceph_caps_issued(ci, NULL);
1141         if (ci->i_xattrs.version == 0 || !(issued & CEPH_CAP_XATTR_EXCL))
1142                 goto do_sync;
1143 
1144         if (!lock_snap_rwsem && !ci->i_head_snapc) {
1145                 lock_snap_rwsem = true;
1146                 if (!down_read_trylock(&mdsc->snap_rwsem)) {
1147                         spin_unlock(&ci->i_ceph_lock);
1148                         down_read(&mdsc->snap_rwsem);
1149                         spin_lock(&ci->i_ceph_lock);
1150                         goto retry;
1151                 }
1152         }
1153 
1154         dout("removexattr %p issued %s\n", inode, ceph_cap_string(issued));
1155 
1156         __build_xattrs(inode);
1157 
1158         required_blob_size = __get_required_blob_size(ci, 0, 0);
1159 
1160         if (!ci->i_xattrs.prealloc_blob ||
1161             required_blob_size > ci->i_xattrs.prealloc_blob->alloc_len) {
1162                 struct ceph_buffer *blob;
1163 
1164                 spin_unlock(&ci->i_ceph_lock);
1165                 dout(" preaallocating new blob size=%d\n", required_blob_size);
1166                 blob = ceph_buffer_new(required_blob_size, GFP_NOFS);
1167                 if (!blob)
1168                         goto do_sync_unlocked;
1169                 spin_lock(&ci->i_ceph_lock);
1170                 if (ci->i_xattrs.prealloc_blob)
1171                         ceph_buffer_put(ci->i_xattrs.prealloc_blob);
1172                 ci->i_xattrs.prealloc_blob = blob;
1173                 goto retry;
1174         }
1175 
1176         err = __remove_xattr_by_name(ceph_inode(inode), name);
1177 
1178         dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_XATTR_EXCL,
1179                                        &prealloc_cf);
1180         ci->i_xattrs.dirty = true;
1181         inode->i_ctime = current_fs_time(inode->i_sb);
1182         spin_unlock(&ci->i_ceph_lock);
1183         if (lock_snap_rwsem)
1184                 up_read(&mdsc->snap_rwsem);
1185         if (dirty)
1186                 __mark_inode_dirty(inode, dirty);
1187         ceph_free_cap_flush(prealloc_cf);
1188         return err;
1189 do_sync:
1190         spin_unlock(&ci->i_ceph_lock);
1191 do_sync_unlocked:
1192         if (lock_snap_rwsem)
1193                 up_read(&mdsc->snap_rwsem);
1194         ceph_free_cap_flush(prealloc_cf);
1195         err = ceph_send_removexattr(dentry, name);
1196         return err;
1197 }
1198 
1199 int ceph_removexattr(struct dentry *dentry, const char *name)
1200 {
1201         if (ceph_snap(d_inode(dentry)) != CEPH_NOSNAP)
1202                 return -EROFS;
1203 
1204         if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN))
1205                 return generic_removexattr(dentry, name);
1206 
1207         return __ceph_removexattr(dentry, name);
1208 }
1209 
1210 #ifdef CONFIG_SECURITY
1211 bool ceph_security_xattr_wanted(struct inode *in)
1212 {
1213         return in->i_security != NULL;
1214 }
1215 
1216 bool ceph_security_xattr_deadlock(struct inode *in)
1217 {
1218         struct ceph_inode_info *ci;
1219         bool ret;
1220         if (in->i_security == NULL)
1221                 return false;
1222         ci = ceph_inode(in);
1223         spin_lock(&ci->i_ceph_lock);
1224         ret = !(ci->i_ceph_flags & CEPH_I_SEC_INITED) &&
1225               !(ci->i_xattrs.version > 0 &&
1226                 __ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 0));
1227         spin_unlock(&ci->i_ceph_lock);
1228         return ret;
1229 }
1230 #endif
1231 

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