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Commit | Line | Data |
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3d14c5d2 YS |
1 | #include <linux/ceph/ceph_debug.h> |
2 | ||
355da1eb | 3 | #include "super.h" |
3d14c5d2 YS |
4 | #include "mds_client.h" |
5 | ||
6 | #include <linux/ceph/decode.h> | |
355da1eb SW |
7 | |
8 | #include <linux/xattr.h> | |
5a0e3ad6 | 9 | #include <linux/slab.h> |
355da1eb | 10 | |
22891907 AE |
11 | #define XATTR_CEPH_PREFIX "ceph." |
12 | #define XATTR_CEPH_PREFIX_LEN (sizeof (XATTR_CEPH_PREFIX) - 1) | |
13 | ||
7221fe4c GZ |
14 | /* |
15 | * List of handlers for synthetic system.* attributes. Other | |
16 | * attributes are handled directly. | |
17 | */ | |
18 | const struct xattr_handler *ceph_xattr_handlers[] = { | |
19 | #ifdef CONFIG_CEPH_FS_POSIX_ACL | |
20 | &ceph_xattr_acl_access_handler, | |
21 | &ceph_xattr_acl_default_handler, | |
22 | #endif | |
23 | NULL, | |
24 | }; | |
25 | ||
355da1eb SW |
26 | static bool ceph_is_valid_xattr(const char *name) |
27 | { | |
22891907 | 28 | return !strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN) || |
1a756278 | 29 | !strncmp(name, XATTR_SECURITY_PREFIX, |
355da1eb | 30 | XATTR_SECURITY_PREFIX_LEN) || |
7221fe4c | 31 | !strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN) || |
355da1eb SW |
32 | !strncmp(name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN) || |
33 | !strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN); | |
34 | } | |
35 | ||
36 | /* | |
37 | * These define virtual xattrs exposing the recursive directory | |
38 | * statistics and layout metadata. | |
39 | */ | |
881a5fa2 | 40 | struct ceph_vxattr { |
355da1eb | 41 | char *name; |
3ce6cd12 | 42 | size_t name_size; /* strlen(name) + 1 (for '\0') */ |
355da1eb SW |
43 | size_t (*getxattr_cb)(struct ceph_inode_info *ci, char *val, |
44 | size_t size); | |
8860147a | 45 | bool readonly, hidden; |
f36e4472 | 46 | bool (*exists_cb)(struct ceph_inode_info *ci); |
355da1eb SW |
47 | }; |
48 | ||
32ab0bd7 SW |
49 | /* layouts */ |
50 | ||
51 | static bool ceph_vxattrcb_layout_exists(struct ceph_inode_info *ci) | |
52 | { | |
53 | size_t s; | |
54 | char *p = (char *)&ci->i_layout; | |
55 | ||
56 | for (s = 0; s < sizeof(ci->i_layout); s++, p++) | |
57 | if (*p) | |
58 | return true; | |
59 | return false; | |
60 | } | |
61 | ||
62 | static size_t ceph_vxattrcb_layout(struct ceph_inode_info *ci, char *val, | |
63 | size_t size) | |
64 | { | |
65 | int ret; | |
66 | struct ceph_fs_client *fsc = ceph_sb_to_client(ci->vfs_inode.i_sb); | |
67 | struct ceph_osd_client *osdc = &fsc->client->osdc; | |
68 | s64 pool = ceph_file_layout_pg_pool(ci->i_layout); | |
69 | const char *pool_name; | |
70 | ||
71 | dout("ceph_vxattrcb_layout %p\n", &ci->vfs_inode); | |
72 | down_read(&osdc->map_sem); | |
73 | pool_name = ceph_pg_pool_name_by_id(osdc->osdmap, pool); | |
74 | if (pool_name) | |
75 | ret = snprintf(val, size, | |
76 | "stripe_unit=%lld stripe_count=%lld object_size=%lld pool=%s", | |
77 | (unsigned long long)ceph_file_layout_su(ci->i_layout), | |
78 | (unsigned long long)ceph_file_layout_stripe_count(ci->i_layout), | |
79 | (unsigned long long)ceph_file_layout_object_size(ci->i_layout), | |
80 | pool_name); | |
81 | else | |
82 | ret = snprintf(val, size, | |
83 | "stripe_unit=%lld stripe_count=%lld object_size=%lld pool=%lld", | |
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 | (unsigned long long)pool); | |
88 | ||
89 | up_read(&osdc->map_sem); | |
90 | return ret; | |
91 | } | |
92 | ||
695b7119 SW |
93 | static size_t ceph_vxattrcb_layout_stripe_unit(struct ceph_inode_info *ci, |
94 | char *val, size_t size) | |
95 | { | |
96 | return snprintf(val, size, "%lld", | |
97 | (unsigned long long)ceph_file_layout_su(ci->i_layout)); | |
98 | } | |
99 | ||
100 | static size_t ceph_vxattrcb_layout_stripe_count(struct ceph_inode_info *ci, | |
101 | char *val, size_t size) | |
102 | { | |
103 | return snprintf(val, size, "%lld", | |
104 | (unsigned long long)ceph_file_layout_stripe_count(ci->i_layout)); | |
105 | } | |
106 | ||
107 | static size_t ceph_vxattrcb_layout_object_size(struct ceph_inode_info *ci, | |
108 | char *val, size_t size) | |
109 | { | |
110 | return snprintf(val, size, "%lld", | |
111 | (unsigned long long)ceph_file_layout_object_size(ci->i_layout)); | |
112 | } | |
113 | ||
114 | static size_t ceph_vxattrcb_layout_pool(struct ceph_inode_info *ci, | |
115 | char *val, size_t size) | |
116 | { | |
117 | int ret; | |
118 | struct ceph_fs_client *fsc = ceph_sb_to_client(ci->vfs_inode.i_sb); | |
119 | struct ceph_osd_client *osdc = &fsc->client->osdc; | |
120 | s64 pool = ceph_file_layout_pg_pool(ci->i_layout); | |
121 | const char *pool_name; | |
122 | ||
123 | down_read(&osdc->map_sem); | |
124 | pool_name = ceph_pg_pool_name_by_id(osdc->osdmap, pool); | |
125 | if (pool_name) | |
126 | ret = snprintf(val, size, "%s", pool_name); | |
127 | else | |
128 | ret = snprintf(val, size, "%lld", (unsigned long long)pool); | |
129 | up_read(&osdc->map_sem); | |
130 | return ret; | |
131 | } | |
132 | ||
355da1eb SW |
133 | /* directories */ |
134 | ||
aa4066ed | 135 | static size_t ceph_vxattrcb_dir_entries(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
136 | size_t size) |
137 | { | |
138 | return snprintf(val, size, "%lld", ci->i_files + ci->i_subdirs); | |
139 | } | |
140 | ||
aa4066ed | 141 | static size_t ceph_vxattrcb_dir_files(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
142 | size_t size) |
143 | { | |
144 | return snprintf(val, size, "%lld", ci->i_files); | |
145 | } | |
146 | ||
aa4066ed | 147 | static size_t ceph_vxattrcb_dir_subdirs(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
148 | size_t size) |
149 | { | |
150 | return snprintf(val, size, "%lld", ci->i_subdirs); | |
151 | } | |
152 | ||
aa4066ed | 153 | static size_t ceph_vxattrcb_dir_rentries(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
154 | size_t size) |
155 | { | |
156 | return snprintf(val, size, "%lld", ci->i_rfiles + ci->i_rsubdirs); | |
157 | } | |
158 | ||
aa4066ed | 159 | static size_t ceph_vxattrcb_dir_rfiles(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
160 | size_t size) |
161 | { | |
162 | return snprintf(val, size, "%lld", ci->i_rfiles); | |
163 | } | |
164 | ||
aa4066ed | 165 | static size_t ceph_vxattrcb_dir_rsubdirs(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
166 | size_t size) |
167 | { | |
168 | return snprintf(val, size, "%lld", ci->i_rsubdirs); | |
169 | } | |
170 | ||
aa4066ed | 171 | static size_t ceph_vxattrcb_dir_rbytes(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
172 | size_t size) |
173 | { | |
174 | return snprintf(val, size, "%lld", ci->i_rbytes); | |
175 | } | |
176 | ||
aa4066ed | 177 | static size_t ceph_vxattrcb_dir_rctime(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
178 | size_t size) |
179 | { | |
3489b42a | 180 | return snprintf(val, size, "%ld.09%ld", (long)ci->i_rctime.tv_sec, |
355da1eb SW |
181 | (long)ci->i_rctime.tv_nsec); |
182 | } | |
183 | ||
32ab0bd7 | 184 | |
eb788084 | 185 | #define CEPH_XATTR_NAME(_type, _name) XATTR_CEPH_PREFIX #_type "." #_name |
695b7119 SW |
186 | #define CEPH_XATTR_NAME2(_type, _name, _name2) \ |
187 | XATTR_CEPH_PREFIX #_type "." #_name "." #_name2 | |
eb788084 | 188 | |
8860147a SW |
189 | #define XATTR_NAME_CEPH(_type, _name) \ |
190 | { \ | |
191 | .name = CEPH_XATTR_NAME(_type, _name), \ | |
192 | .name_size = sizeof (CEPH_XATTR_NAME(_type, _name)), \ | |
193 | .getxattr_cb = ceph_vxattrcb_ ## _type ## _ ## _name, \ | |
194 | .readonly = true, \ | |
195 | .hidden = false, \ | |
f36e4472 | 196 | .exists_cb = NULL, \ |
8860147a | 197 | } |
695b7119 SW |
198 | #define XATTR_LAYOUT_FIELD(_type, _name, _field) \ |
199 | { \ | |
200 | .name = CEPH_XATTR_NAME2(_type, _name, _field), \ | |
201 | .name_size = sizeof (CEPH_XATTR_NAME2(_type, _name, _field)), \ | |
202 | .getxattr_cb = ceph_vxattrcb_ ## _name ## _ ## _field, \ | |
203 | .readonly = false, \ | |
204 | .hidden = true, \ | |
205 | .exists_cb = ceph_vxattrcb_layout_exists, \ | |
206 | } | |
eb788084 | 207 | |
881a5fa2 | 208 | static struct ceph_vxattr ceph_dir_vxattrs[] = { |
1f08f2b0 SW |
209 | { |
210 | .name = "ceph.dir.layout", | |
211 | .name_size = sizeof("ceph.dir.layout"), | |
212 | .getxattr_cb = ceph_vxattrcb_layout, | |
213 | .readonly = false, | |
214 | .hidden = false, | |
215 | .exists_cb = ceph_vxattrcb_layout_exists, | |
216 | }, | |
695b7119 SW |
217 | XATTR_LAYOUT_FIELD(dir, layout, stripe_unit), |
218 | XATTR_LAYOUT_FIELD(dir, layout, stripe_count), | |
219 | XATTR_LAYOUT_FIELD(dir, layout, object_size), | |
220 | XATTR_LAYOUT_FIELD(dir, layout, pool), | |
eb788084 AE |
221 | XATTR_NAME_CEPH(dir, entries), |
222 | XATTR_NAME_CEPH(dir, files), | |
223 | XATTR_NAME_CEPH(dir, subdirs), | |
224 | XATTR_NAME_CEPH(dir, rentries), | |
225 | XATTR_NAME_CEPH(dir, rfiles), | |
226 | XATTR_NAME_CEPH(dir, rsubdirs), | |
227 | XATTR_NAME_CEPH(dir, rbytes), | |
228 | XATTR_NAME_CEPH(dir, rctime), | |
2c3dd4ff | 229 | { .name = NULL, 0 } /* Required table terminator */ |
355da1eb | 230 | }; |
3ce6cd12 | 231 | static size_t ceph_dir_vxattrs_name_size; /* total size of all names */ |
355da1eb SW |
232 | |
233 | /* files */ | |
234 | ||
881a5fa2 | 235 | static struct ceph_vxattr ceph_file_vxattrs[] = { |
32ab0bd7 SW |
236 | { |
237 | .name = "ceph.file.layout", | |
238 | .name_size = sizeof("ceph.file.layout"), | |
239 | .getxattr_cb = ceph_vxattrcb_layout, | |
240 | .readonly = false, | |
241 | .hidden = false, | |
242 | .exists_cb = ceph_vxattrcb_layout_exists, | |
243 | }, | |
695b7119 SW |
244 | XATTR_LAYOUT_FIELD(file, layout, stripe_unit), |
245 | XATTR_LAYOUT_FIELD(file, layout, stripe_count), | |
246 | XATTR_LAYOUT_FIELD(file, layout, object_size), | |
247 | XATTR_LAYOUT_FIELD(file, layout, pool), | |
2c3dd4ff | 248 | { .name = NULL, 0 } /* Required table terminator */ |
355da1eb | 249 | }; |
3ce6cd12 | 250 | static size_t ceph_file_vxattrs_name_size; /* total size of all names */ |
355da1eb | 251 | |
881a5fa2 | 252 | static struct ceph_vxattr *ceph_inode_vxattrs(struct inode *inode) |
355da1eb SW |
253 | { |
254 | if (S_ISDIR(inode->i_mode)) | |
255 | return ceph_dir_vxattrs; | |
256 | else if (S_ISREG(inode->i_mode)) | |
257 | return ceph_file_vxattrs; | |
258 | return NULL; | |
259 | } | |
260 | ||
3ce6cd12 AE |
261 | static size_t ceph_vxattrs_name_size(struct ceph_vxattr *vxattrs) |
262 | { | |
263 | if (vxattrs == ceph_dir_vxattrs) | |
264 | return ceph_dir_vxattrs_name_size; | |
265 | if (vxattrs == ceph_file_vxattrs) | |
266 | return ceph_file_vxattrs_name_size; | |
267 | BUG(); | |
268 | ||
269 | return 0; | |
270 | } | |
271 | ||
272 | /* | |
273 | * Compute the aggregate size (including terminating '\0') of all | |
274 | * virtual extended attribute names in the given vxattr table. | |
275 | */ | |
276 | static size_t __init vxattrs_name_size(struct ceph_vxattr *vxattrs) | |
277 | { | |
278 | struct ceph_vxattr *vxattr; | |
279 | size_t size = 0; | |
280 | ||
281 | for (vxattr = vxattrs; vxattr->name; vxattr++) | |
8860147a SW |
282 | if (!vxattr->hidden) |
283 | size += vxattr->name_size; | |
3ce6cd12 AE |
284 | |
285 | return size; | |
286 | } | |
287 | ||
288 | /* Routines called at initialization and exit time */ | |
289 | ||
290 | void __init ceph_xattr_init(void) | |
291 | { | |
292 | ceph_dir_vxattrs_name_size = vxattrs_name_size(ceph_dir_vxattrs); | |
293 | ceph_file_vxattrs_name_size = vxattrs_name_size(ceph_file_vxattrs); | |
294 | } | |
295 | ||
296 | void ceph_xattr_exit(void) | |
297 | { | |
298 | ceph_dir_vxattrs_name_size = 0; | |
299 | ceph_file_vxattrs_name_size = 0; | |
300 | } | |
301 | ||
881a5fa2 | 302 | static struct ceph_vxattr *ceph_match_vxattr(struct inode *inode, |
355da1eb SW |
303 | const char *name) |
304 | { | |
881a5fa2 | 305 | struct ceph_vxattr *vxattr = ceph_inode_vxattrs(inode); |
06476a69 AE |
306 | |
307 | if (vxattr) { | |
308 | while (vxattr->name) { | |
309 | if (!strcmp(vxattr->name, name)) | |
310 | return vxattr; | |
311 | vxattr++; | |
312 | } | |
313 | } | |
314 | ||
355da1eb SW |
315 | return NULL; |
316 | } | |
317 | ||
318 | static int __set_xattr(struct ceph_inode_info *ci, | |
319 | const char *name, int name_len, | |
320 | const char *val, int val_len, | |
321 | int dirty, | |
322 | int should_free_name, int should_free_val, | |
323 | struct ceph_inode_xattr **newxattr) | |
324 | { | |
325 | struct rb_node **p; | |
326 | struct rb_node *parent = NULL; | |
327 | struct ceph_inode_xattr *xattr = NULL; | |
328 | int c; | |
329 | int new = 0; | |
330 | ||
331 | p = &ci->i_xattrs.index.rb_node; | |
332 | while (*p) { | |
333 | parent = *p; | |
334 | xattr = rb_entry(parent, struct ceph_inode_xattr, node); | |
335 | c = strncmp(name, xattr->name, min(name_len, xattr->name_len)); | |
336 | if (c < 0) | |
337 | p = &(*p)->rb_left; | |
338 | else if (c > 0) | |
339 | p = &(*p)->rb_right; | |
340 | else { | |
341 | if (name_len == xattr->name_len) | |
342 | break; | |
343 | else if (name_len < xattr->name_len) | |
344 | p = &(*p)->rb_left; | |
345 | else | |
346 | p = &(*p)->rb_right; | |
347 | } | |
348 | xattr = NULL; | |
349 | } | |
350 | ||
351 | if (!xattr) { | |
352 | new = 1; | |
353 | xattr = *newxattr; | |
354 | xattr->name = name; | |
355 | xattr->name_len = name_len; | |
356 | xattr->should_free_name = should_free_name; | |
357 | ||
358 | ci->i_xattrs.count++; | |
359 | dout("__set_xattr count=%d\n", ci->i_xattrs.count); | |
360 | } else { | |
361 | kfree(*newxattr); | |
362 | *newxattr = NULL; | |
363 | if (xattr->should_free_val) | |
364 | kfree((void *)xattr->val); | |
365 | ||
366 | if (should_free_name) { | |
367 | kfree((void *)name); | |
368 | name = xattr->name; | |
369 | } | |
370 | ci->i_xattrs.names_size -= xattr->name_len; | |
371 | ci->i_xattrs.vals_size -= xattr->val_len; | |
372 | } | |
355da1eb SW |
373 | ci->i_xattrs.names_size += name_len; |
374 | ci->i_xattrs.vals_size += val_len; | |
375 | if (val) | |
376 | xattr->val = val; | |
377 | else | |
378 | xattr->val = ""; | |
379 | ||
380 | xattr->val_len = val_len; | |
381 | xattr->dirty = dirty; | |
382 | xattr->should_free_val = (val && should_free_val); | |
383 | ||
384 | if (new) { | |
385 | rb_link_node(&xattr->node, parent, p); | |
386 | rb_insert_color(&xattr->node, &ci->i_xattrs.index); | |
387 | dout("__set_xattr_val p=%p\n", p); | |
388 | } | |
389 | ||
390 | dout("__set_xattr_val added %llx.%llx xattr %p %s=%.*s\n", | |
391 | ceph_vinop(&ci->vfs_inode), xattr, name, val_len, val); | |
392 | ||
393 | return 0; | |
394 | } | |
395 | ||
396 | static struct ceph_inode_xattr *__get_xattr(struct ceph_inode_info *ci, | |
397 | const char *name) | |
398 | { | |
399 | struct rb_node **p; | |
400 | struct rb_node *parent = NULL; | |
401 | struct ceph_inode_xattr *xattr = NULL; | |
17db143f | 402 | int name_len = strlen(name); |
355da1eb SW |
403 | int c; |
404 | ||
405 | p = &ci->i_xattrs.index.rb_node; | |
406 | while (*p) { | |
407 | parent = *p; | |
408 | xattr = rb_entry(parent, struct ceph_inode_xattr, node); | |
409 | c = strncmp(name, xattr->name, xattr->name_len); | |
17db143f SW |
410 | if (c == 0 && name_len > xattr->name_len) |
411 | c = 1; | |
355da1eb SW |
412 | if (c < 0) |
413 | p = &(*p)->rb_left; | |
414 | else if (c > 0) | |
415 | p = &(*p)->rb_right; | |
416 | else { | |
417 | dout("__get_xattr %s: found %.*s\n", name, | |
418 | xattr->val_len, xattr->val); | |
419 | return xattr; | |
420 | } | |
421 | } | |
422 | ||
423 | dout("__get_xattr %s: not found\n", name); | |
424 | ||
425 | return NULL; | |
426 | } | |
427 | ||
428 | static void __free_xattr(struct ceph_inode_xattr *xattr) | |
429 | { | |
430 | BUG_ON(!xattr); | |
431 | ||
432 | if (xattr->should_free_name) | |
433 | kfree((void *)xattr->name); | |
434 | if (xattr->should_free_val) | |
435 | kfree((void *)xattr->val); | |
436 | ||
437 | kfree(xattr); | |
438 | } | |
439 | ||
440 | static int __remove_xattr(struct ceph_inode_info *ci, | |
441 | struct ceph_inode_xattr *xattr) | |
442 | { | |
443 | if (!xattr) | |
444 | return -EOPNOTSUPP; | |
445 | ||
446 | rb_erase(&xattr->node, &ci->i_xattrs.index); | |
447 | ||
448 | if (xattr->should_free_name) | |
449 | kfree((void *)xattr->name); | |
450 | if (xattr->should_free_val) | |
451 | kfree((void *)xattr->val); | |
452 | ||
453 | ci->i_xattrs.names_size -= xattr->name_len; | |
454 | ci->i_xattrs.vals_size -= xattr->val_len; | |
455 | ci->i_xattrs.count--; | |
456 | kfree(xattr); | |
457 | ||
458 | return 0; | |
459 | } | |
460 | ||
461 | static int __remove_xattr_by_name(struct ceph_inode_info *ci, | |
462 | const char *name) | |
463 | { | |
464 | struct rb_node **p; | |
465 | struct ceph_inode_xattr *xattr; | |
466 | int err; | |
467 | ||
468 | p = &ci->i_xattrs.index.rb_node; | |
469 | xattr = __get_xattr(ci, name); | |
470 | err = __remove_xattr(ci, xattr); | |
471 | return err; | |
472 | } | |
473 | ||
474 | static char *__copy_xattr_names(struct ceph_inode_info *ci, | |
475 | char *dest) | |
476 | { | |
477 | struct rb_node *p; | |
478 | struct ceph_inode_xattr *xattr = NULL; | |
479 | ||
480 | p = rb_first(&ci->i_xattrs.index); | |
481 | dout("__copy_xattr_names count=%d\n", ci->i_xattrs.count); | |
482 | ||
483 | while (p) { | |
484 | xattr = rb_entry(p, struct ceph_inode_xattr, node); | |
485 | memcpy(dest, xattr->name, xattr->name_len); | |
486 | dest[xattr->name_len] = '\0'; | |
487 | ||
488 | dout("dest=%s %p (%s) (%d/%d)\n", dest, xattr, xattr->name, | |
489 | xattr->name_len, ci->i_xattrs.names_size); | |
490 | ||
491 | dest += xattr->name_len + 1; | |
492 | p = rb_next(p); | |
493 | } | |
494 | ||
495 | return dest; | |
496 | } | |
497 | ||
498 | void __ceph_destroy_xattrs(struct ceph_inode_info *ci) | |
499 | { | |
500 | struct rb_node *p, *tmp; | |
501 | struct ceph_inode_xattr *xattr = NULL; | |
502 | ||
503 | p = rb_first(&ci->i_xattrs.index); | |
504 | ||
505 | dout("__ceph_destroy_xattrs p=%p\n", p); | |
506 | ||
507 | while (p) { | |
508 | xattr = rb_entry(p, struct ceph_inode_xattr, node); | |
509 | tmp = p; | |
510 | p = rb_next(tmp); | |
511 | dout("__ceph_destroy_xattrs next p=%p (%.*s)\n", p, | |
512 | xattr->name_len, xattr->name); | |
513 | rb_erase(tmp, &ci->i_xattrs.index); | |
514 | ||
515 | __free_xattr(xattr); | |
516 | } | |
517 | ||
518 | ci->i_xattrs.names_size = 0; | |
519 | ci->i_xattrs.vals_size = 0; | |
520 | ci->i_xattrs.index_version = 0; | |
521 | ci->i_xattrs.count = 0; | |
522 | ci->i_xattrs.index = RB_ROOT; | |
523 | } | |
524 | ||
525 | static int __build_xattrs(struct inode *inode) | |
be655596 SW |
526 | __releases(ci->i_ceph_lock) |
527 | __acquires(ci->i_ceph_lock) | |
355da1eb SW |
528 | { |
529 | u32 namelen; | |
530 | u32 numattr = 0; | |
531 | void *p, *end; | |
532 | u32 len; | |
533 | const char *name, *val; | |
534 | struct ceph_inode_info *ci = ceph_inode(inode); | |
535 | int xattr_version; | |
536 | struct ceph_inode_xattr **xattrs = NULL; | |
63ff78b2 | 537 | int err = 0; |
355da1eb SW |
538 | int i; |
539 | ||
540 | dout("__build_xattrs() len=%d\n", | |
541 | ci->i_xattrs.blob ? (int)ci->i_xattrs.blob->vec.iov_len : 0); | |
542 | ||
543 | if (ci->i_xattrs.index_version >= ci->i_xattrs.version) | |
544 | return 0; /* already built */ | |
545 | ||
546 | __ceph_destroy_xattrs(ci); | |
547 | ||
548 | start: | |
549 | /* updated internal xattr rb tree */ | |
550 | if (ci->i_xattrs.blob && ci->i_xattrs.blob->vec.iov_len > 4) { | |
551 | p = ci->i_xattrs.blob->vec.iov_base; | |
552 | end = p + ci->i_xattrs.blob->vec.iov_len; | |
553 | ceph_decode_32_safe(&p, end, numattr, bad); | |
554 | xattr_version = ci->i_xattrs.version; | |
be655596 | 555 | spin_unlock(&ci->i_ceph_lock); |
355da1eb SW |
556 | |
557 | xattrs = kcalloc(numattr, sizeof(struct ceph_xattr *), | |
558 | GFP_NOFS); | |
559 | err = -ENOMEM; | |
560 | if (!xattrs) | |
561 | goto bad_lock; | |
562 | memset(xattrs, 0, numattr*sizeof(struct ceph_xattr *)); | |
563 | for (i = 0; i < numattr; i++) { | |
564 | xattrs[i] = kmalloc(sizeof(struct ceph_inode_xattr), | |
565 | GFP_NOFS); | |
566 | if (!xattrs[i]) | |
567 | goto bad_lock; | |
568 | } | |
569 | ||
be655596 | 570 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
571 | if (ci->i_xattrs.version != xattr_version) { |
572 | /* lost a race, retry */ | |
573 | for (i = 0; i < numattr; i++) | |
574 | kfree(xattrs[i]); | |
575 | kfree(xattrs); | |
21ec6ffa | 576 | xattrs = NULL; |
355da1eb SW |
577 | goto start; |
578 | } | |
579 | err = -EIO; | |
580 | while (numattr--) { | |
581 | ceph_decode_32_safe(&p, end, len, bad); | |
582 | namelen = len; | |
583 | name = p; | |
584 | p += len; | |
585 | ceph_decode_32_safe(&p, end, len, bad); | |
586 | val = p; | |
587 | p += len; | |
588 | ||
589 | err = __set_xattr(ci, name, namelen, val, len, | |
590 | 0, 0, 0, &xattrs[numattr]); | |
591 | ||
592 | if (err < 0) | |
593 | goto bad; | |
594 | } | |
595 | kfree(xattrs); | |
596 | } | |
597 | ci->i_xattrs.index_version = ci->i_xattrs.version; | |
598 | ci->i_xattrs.dirty = false; | |
599 | ||
600 | return err; | |
601 | bad_lock: | |
be655596 | 602 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
603 | bad: |
604 | if (xattrs) { | |
605 | for (i = 0; i < numattr; i++) | |
606 | kfree(xattrs[i]); | |
607 | kfree(xattrs); | |
608 | } | |
609 | ci->i_xattrs.names_size = 0; | |
610 | return err; | |
611 | } | |
612 | ||
613 | static int __get_required_blob_size(struct ceph_inode_info *ci, int name_size, | |
614 | int val_size) | |
615 | { | |
616 | /* | |
617 | * 4 bytes for the length, and additional 4 bytes per each xattr name, | |
618 | * 4 bytes per each value | |
619 | */ | |
620 | int size = 4 + ci->i_xattrs.count*(4 + 4) + | |
621 | ci->i_xattrs.names_size + | |
622 | ci->i_xattrs.vals_size; | |
623 | dout("__get_required_blob_size c=%d names.size=%d vals.size=%d\n", | |
624 | ci->i_xattrs.count, ci->i_xattrs.names_size, | |
625 | ci->i_xattrs.vals_size); | |
626 | ||
627 | if (name_size) | |
628 | size += 4 + 4 + name_size + val_size; | |
629 | ||
630 | return size; | |
631 | } | |
632 | ||
633 | /* | |
634 | * If there are dirty xattrs, reencode xattrs into the prealloc_blob | |
635 | * and swap into place. | |
636 | */ | |
637 | void __ceph_build_xattrs_blob(struct ceph_inode_info *ci) | |
638 | { | |
639 | struct rb_node *p; | |
640 | struct ceph_inode_xattr *xattr = NULL; | |
641 | void *dest; | |
642 | ||
643 | dout("__build_xattrs_blob %p\n", &ci->vfs_inode); | |
644 | if (ci->i_xattrs.dirty) { | |
645 | int need = __get_required_blob_size(ci, 0, 0); | |
646 | ||
647 | BUG_ON(need > ci->i_xattrs.prealloc_blob->alloc_len); | |
648 | ||
649 | p = rb_first(&ci->i_xattrs.index); | |
650 | dest = ci->i_xattrs.prealloc_blob->vec.iov_base; | |
651 | ||
652 | ceph_encode_32(&dest, ci->i_xattrs.count); | |
653 | while (p) { | |
654 | xattr = rb_entry(p, struct ceph_inode_xattr, node); | |
655 | ||
656 | ceph_encode_32(&dest, xattr->name_len); | |
657 | memcpy(dest, xattr->name, xattr->name_len); | |
658 | dest += xattr->name_len; | |
659 | ceph_encode_32(&dest, xattr->val_len); | |
660 | memcpy(dest, xattr->val, xattr->val_len); | |
661 | dest += xattr->val_len; | |
662 | ||
663 | p = rb_next(p); | |
664 | } | |
665 | ||
666 | /* adjust buffer len; it may be larger than we need */ | |
667 | ci->i_xattrs.prealloc_blob->vec.iov_len = | |
668 | dest - ci->i_xattrs.prealloc_blob->vec.iov_base; | |
669 | ||
b6c1d5b8 SW |
670 | if (ci->i_xattrs.blob) |
671 | ceph_buffer_put(ci->i_xattrs.blob); | |
355da1eb SW |
672 | ci->i_xattrs.blob = ci->i_xattrs.prealloc_blob; |
673 | ci->i_xattrs.prealloc_blob = NULL; | |
674 | ci->i_xattrs.dirty = false; | |
4a625be4 | 675 | ci->i_xattrs.version++; |
355da1eb SW |
676 | } |
677 | } | |
678 | ||
7221fe4c | 679 | ssize_t __ceph_getxattr(struct inode *inode, const char *name, void *value, |
355da1eb SW |
680 | size_t size) |
681 | { | |
355da1eb | 682 | struct ceph_inode_info *ci = ceph_inode(inode); |
355da1eb SW |
683 | int err; |
684 | struct ceph_inode_xattr *xattr; | |
881a5fa2 | 685 | struct ceph_vxattr *vxattr = NULL; |
355da1eb SW |
686 | |
687 | if (!ceph_is_valid_xattr(name)) | |
688 | return -ENODATA; | |
689 | ||
0bee82fb SW |
690 | /* let's see if a virtual xattr was requested */ |
691 | vxattr = ceph_match_vxattr(inode, name); | |
692 | if (vxattr && !(vxattr->exists_cb && !vxattr->exists_cb(ci))) { | |
693 | err = vxattr->getxattr_cb(ci, value, size); | |
a1dc1937 | 694 | return err; |
0bee82fb SW |
695 | } |
696 | ||
a1dc1937 | 697 | spin_lock(&ci->i_ceph_lock); |
698 | dout("getxattr %p ver=%lld index_ver=%lld\n", inode, | |
699 | ci->i_xattrs.version, ci->i_xattrs.index_version); | |
700 | ||
355da1eb SW |
701 | if (__ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 1) && |
702 | (ci->i_xattrs.index_version >= ci->i_xattrs.version)) { | |
703 | goto get_xattr; | |
704 | } else { | |
be655596 | 705 | spin_unlock(&ci->i_ceph_lock); |
355da1eb SW |
706 | /* get xattrs from mds (if we don't already have them) */ |
707 | err = ceph_do_getattr(inode, CEPH_STAT_CAP_XATTR); | |
708 | if (err) | |
709 | return err; | |
710 | } | |
711 | ||
be655596 | 712 | spin_lock(&ci->i_ceph_lock); |
355da1eb | 713 | |
355da1eb SW |
714 | err = __build_xattrs(inode); |
715 | if (err < 0) | |
716 | goto out; | |
717 | ||
718 | get_xattr: | |
719 | err = -ENODATA; /* == ENOATTR */ | |
720 | xattr = __get_xattr(ci, name); | |
0bee82fb | 721 | if (!xattr) |
355da1eb | 722 | goto out; |
355da1eb SW |
723 | |
724 | err = -ERANGE; | |
725 | if (size && size < xattr->val_len) | |
726 | goto out; | |
727 | ||
728 | err = xattr->val_len; | |
729 | if (size == 0) | |
730 | goto out; | |
731 | ||
732 | memcpy(value, xattr->val, xattr->val_len); | |
733 | ||
734 | out: | |
be655596 | 735 | spin_unlock(&ci->i_ceph_lock); |
355da1eb SW |
736 | return err; |
737 | } | |
738 | ||
7221fe4c GZ |
739 | ssize_t ceph_getxattr(struct dentry *dentry, const char *name, void *value, |
740 | size_t size) | |
741 | { | |
742 | if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN)) | |
743 | return generic_getxattr(dentry, name, value, size); | |
744 | ||
745 | return __ceph_getxattr(dentry->d_inode, name, value, size); | |
746 | } | |
747 | ||
355da1eb SW |
748 | ssize_t ceph_listxattr(struct dentry *dentry, char *names, size_t size) |
749 | { | |
750 | struct inode *inode = dentry->d_inode; | |
751 | struct ceph_inode_info *ci = ceph_inode(inode); | |
881a5fa2 | 752 | struct ceph_vxattr *vxattrs = ceph_inode_vxattrs(inode); |
355da1eb SW |
753 | u32 vir_namelen = 0; |
754 | u32 namelen; | |
755 | int err; | |
756 | u32 len; | |
757 | int i; | |
758 | ||
be655596 | 759 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
760 | dout("listxattr %p ver=%lld index_ver=%lld\n", inode, |
761 | ci->i_xattrs.version, ci->i_xattrs.index_version); | |
762 | ||
763 | if (__ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 1) && | |
bddfa3cc | 764 | (ci->i_xattrs.index_version >= ci->i_xattrs.version)) { |
355da1eb SW |
765 | goto list_xattr; |
766 | } else { | |
be655596 | 767 | spin_unlock(&ci->i_ceph_lock); |
355da1eb SW |
768 | err = ceph_do_getattr(inode, CEPH_STAT_CAP_XATTR); |
769 | if (err) | |
770 | return err; | |
771 | } | |
772 | ||
be655596 | 773 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
774 | |
775 | err = __build_xattrs(inode); | |
776 | if (err < 0) | |
777 | goto out; | |
778 | ||
779 | list_xattr: | |
3ce6cd12 AE |
780 | /* |
781 | * Start with virtual dir xattr names (if any) (including | |
782 | * terminating '\0' characters for each). | |
783 | */ | |
784 | vir_namelen = ceph_vxattrs_name_size(vxattrs); | |
785 | ||
355da1eb | 786 | /* adding 1 byte per each variable due to the null termination */ |
b65917dd | 787 | namelen = ci->i_xattrs.names_size + ci->i_xattrs.count; |
355da1eb | 788 | err = -ERANGE; |
b65917dd | 789 | if (size && vir_namelen + namelen > size) |
355da1eb SW |
790 | goto out; |
791 | ||
b65917dd | 792 | err = namelen + vir_namelen; |
355da1eb SW |
793 | if (size == 0) |
794 | goto out; | |
795 | ||
796 | names = __copy_xattr_names(ci, names); | |
797 | ||
798 | /* virtual xattr names, too */ | |
b65917dd SW |
799 | err = namelen; |
800 | if (vxattrs) { | |
355da1eb | 801 | for (i = 0; vxattrs[i].name; i++) { |
b65917dd SW |
802 | if (!vxattrs[i].hidden && |
803 | !(vxattrs[i].exists_cb && | |
804 | !vxattrs[i].exists_cb(ci))) { | |
805 | len = sprintf(names, "%s", vxattrs[i].name); | |
806 | names += len + 1; | |
807 | err += len + 1; | |
808 | } | |
355da1eb | 809 | } |
b65917dd | 810 | } |
355da1eb SW |
811 | |
812 | out: | |
be655596 | 813 | spin_unlock(&ci->i_ceph_lock); |
355da1eb SW |
814 | return err; |
815 | } | |
816 | ||
817 | static int ceph_sync_setxattr(struct dentry *dentry, const char *name, | |
818 | const char *value, size_t size, int flags) | |
819 | { | |
3d14c5d2 | 820 | struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb); |
355da1eb SW |
821 | struct inode *inode = dentry->d_inode; |
822 | struct ceph_inode_info *ci = ceph_inode(inode); | |
5f21c96d | 823 | struct inode *parent_inode; |
355da1eb | 824 | struct ceph_mds_request *req; |
3d14c5d2 | 825 | struct ceph_mds_client *mdsc = fsc->mdsc; |
355da1eb SW |
826 | int err; |
827 | int i, nr_pages; | |
828 | struct page **pages = NULL; | |
829 | void *kaddr; | |
830 | ||
831 | /* copy value into some pages */ | |
832 | nr_pages = calc_pages_for(0, size); | |
833 | if (nr_pages) { | |
834 | pages = kmalloc(sizeof(pages[0])*nr_pages, GFP_NOFS); | |
835 | if (!pages) | |
836 | return -ENOMEM; | |
837 | err = -ENOMEM; | |
838 | for (i = 0; i < nr_pages; i++) { | |
31459fe4 | 839 | pages[i] = __page_cache_alloc(GFP_NOFS); |
355da1eb SW |
840 | if (!pages[i]) { |
841 | nr_pages = i; | |
842 | goto out; | |
843 | } | |
844 | kaddr = kmap(pages[i]); | |
845 | memcpy(kaddr, value + i*PAGE_CACHE_SIZE, | |
846 | min(PAGE_CACHE_SIZE, size-i*PAGE_CACHE_SIZE)); | |
847 | } | |
848 | } | |
849 | ||
850 | dout("setxattr value=%.*s\n", (int)size, value); | |
851 | ||
852 | /* do request */ | |
853 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETXATTR, | |
854 | USE_AUTH_MDS); | |
60d87733 JL |
855 | if (IS_ERR(req)) { |
856 | err = PTR_ERR(req); | |
857 | goto out; | |
858 | } | |
70b666c3 SW |
859 | req->r_inode = inode; |
860 | ihold(inode); | |
355da1eb SW |
861 | req->r_inode_drop = CEPH_CAP_XATTR_SHARED; |
862 | req->r_num_caps = 1; | |
863 | req->r_args.setxattr.flags = cpu_to_le32(flags); | |
864 | req->r_path2 = kstrdup(name, GFP_NOFS); | |
865 | ||
866 | req->r_pages = pages; | |
867 | req->r_num_pages = nr_pages; | |
868 | req->r_data_len = size; | |
869 | ||
870 | dout("xattr.ver (before): %lld\n", ci->i_xattrs.version); | |
5f21c96d | 871 | parent_inode = ceph_get_dentry_parent_inode(dentry); |
355da1eb | 872 | err = ceph_mdsc_do_request(mdsc, parent_inode, req); |
5f21c96d | 873 | iput(parent_inode); |
355da1eb SW |
874 | ceph_mdsc_put_request(req); |
875 | dout("xattr.ver (after): %lld\n", ci->i_xattrs.version); | |
876 | ||
877 | out: | |
878 | if (pages) { | |
879 | for (i = 0; i < nr_pages; i++) | |
880 | __free_page(pages[i]); | |
881 | kfree(pages); | |
882 | } | |
883 | return err; | |
884 | } | |
885 | ||
7221fe4c GZ |
886 | int __ceph_setxattr(struct dentry *dentry, const char *name, |
887 | const void *value, size_t size, int flags) | |
355da1eb SW |
888 | { |
889 | struct inode *inode = dentry->d_inode; | |
881a5fa2 | 890 | struct ceph_vxattr *vxattr; |
355da1eb | 891 | struct ceph_inode_info *ci = ceph_inode(inode); |
18fa8b3f | 892 | int issued; |
355da1eb | 893 | int err; |
18fa8b3f | 894 | int dirty; |
355da1eb SW |
895 | int name_len = strlen(name); |
896 | int val_len = size; | |
897 | char *newname = NULL; | |
898 | char *newval = NULL; | |
899 | struct ceph_inode_xattr *xattr = NULL; | |
355da1eb SW |
900 | int required_blob_size; |
901 | ||
355da1eb SW |
902 | if (!ceph_is_valid_xattr(name)) |
903 | return -EOPNOTSUPP; | |
904 | ||
06476a69 AE |
905 | vxattr = ceph_match_vxattr(inode, name); |
906 | if (vxattr && vxattr->readonly) | |
907 | return -EOPNOTSUPP; | |
355da1eb | 908 | |
3adf654d SW |
909 | /* pass any unhandled ceph.* xattrs through to the MDS */ |
910 | if (!strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN)) | |
911 | goto do_sync_unlocked; | |
912 | ||
355da1eb SW |
913 | /* preallocate memory for xattr name, value, index node */ |
914 | err = -ENOMEM; | |
61413c2f | 915 | newname = kmemdup(name, name_len + 1, GFP_NOFS); |
355da1eb SW |
916 | if (!newname) |
917 | goto out; | |
355da1eb SW |
918 | |
919 | if (val_len) { | |
b829c195 | 920 | newval = kmemdup(value, val_len, GFP_NOFS); |
355da1eb SW |
921 | if (!newval) |
922 | goto out; | |
355da1eb SW |
923 | } |
924 | ||
925 | xattr = kmalloc(sizeof(struct ceph_inode_xattr), GFP_NOFS); | |
926 | if (!xattr) | |
927 | goto out; | |
928 | ||
be655596 | 929 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
930 | retry: |
931 | issued = __ceph_caps_issued(ci, NULL); | |
18fa8b3f | 932 | dout("setxattr %p issued %s\n", inode, ceph_cap_string(issued)); |
355da1eb SW |
933 | if (!(issued & CEPH_CAP_XATTR_EXCL)) |
934 | goto do_sync; | |
935 | __build_xattrs(inode); | |
936 | ||
937 | required_blob_size = __get_required_blob_size(ci, name_len, val_len); | |
938 | ||
939 | if (!ci->i_xattrs.prealloc_blob || | |
940 | required_blob_size > ci->i_xattrs.prealloc_blob->alloc_len) { | |
18fa8b3f | 941 | struct ceph_buffer *blob; |
355da1eb | 942 | |
be655596 | 943 | spin_unlock(&ci->i_ceph_lock); |
355da1eb | 944 | dout(" preaallocating new blob size=%d\n", required_blob_size); |
b6c1d5b8 | 945 | blob = ceph_buffer_new(required_blob_size, GFP_NOFS); |
355da1eb SW |
946 | if (!blob) |
947 | goto out; | |
be655596 | 948 | spin_lock(&ci->i_ceph_lock); |
b6c1d5b8 SW |
949 | if (ci->i_xattrs.prealloc_blob) |
950 | ceph_buffer_put(ci->i_xattrs.prealloc_blob); | |
355da1eb SW |
951 | ci->i_xattrs.prealloc_blob = blob; |
952 | goto retry; | |
953 | } | |
954 | ||
355da1eb SW |
955 | err = __set_xattr(ci, newname, name_len, newval, |
956 | val_len, 1, 1, 1, &xattr); | |
18fa8b3f | 957 | |
fca65b4a | 958 | dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_XATTR_EXCL); |
355da1eb SW |
959 | ci->i_xattrs.dirty = true; |
960 | inode->i_ctime = CURRENT_TIME; | |
18fa8b3f | 961 | |
be655596 | 962 | spin_unlock(&ci->i_ceph_lock); |
fca65b4a SW |
963 | if (dirty) |
964 | __mark_inode_dirty(inode, dirty); | |
355da1eb SW |
965 | return err; |
966 | ||
967 | do_sync: | |
be655596 | 968 | spin_unlock(&ci->i_ceph_lock); |
3adf654d | 969 | do_sync_unlocked: |
355da1eb SW |
970 | err = ceph_sync_setxattr(dentry, name, value, size, flags); |
971 | out: | |
972 | kfree(newname); | |
973 | kfree(newval); | |
974 | kfree(xattr); | |
975 | return err; | |
976 | } | |
977 | ||
7221fe4c GZ |
978 | int ceph_setxattr(struct dentry *dentry, const char *name, |
979 | const void *value, size_t size, int flags) | |
980 | { | |
981 | if (ceph_snap(dentry->d_inode) != CEPH_NOSNAP) | |
982 | return -EROFS; | |
983 | ||
984 | if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN)) | |
985 | return generic_setxattr(dentry, name, value, size, flags); | |
986 | ||
987 | return __ceph_setxattr(dentry, name, value, size, flags); | |
988 | } | |
989 | ||
355da1eb SW |
990 | static int ceph_send_removexattr(struct dentry *dentry, const char *name) |
991 | { | |
3d14c5d2 YS |
992 | struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb); |
993 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
355da1eb | 994 | struct inode *inode = dentry->d_inode; |
5f21c96d | 995 | struct inode *parent_inode; |
355da1eb SW |
996 | struct ceph_mds_request *req; |
997 | int err; | |
998 | ||
999 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_RMXATTR, | |
1000 | USE_AUTH_MDS); | |
1001 | if (IS_ERR(req)) | |
1002 | return PTR_ERR(req); | |
70b666c3 SW |
1003 | req->r_inode = inode; |
1004 | ihold(inode); | |
355da1eb SW |
1005 | req->r_inode_drop = CEPH_CAP_XATTR_SHARED; |
1006 | req->r_num_caps = 1; | |
1007 | req->r_path2 = kstrdup(name, GFP_NOFS); | |
1008 | ||
5f21c96d | 1009 | parent_inode = ceph_get_dentry_parent_inode(dentry); |
355da1eb | 1010 | err = ceph_mdsc_do_request(mdsc, parent_inode, req); |
5f21c96d | 1011 | iput(parent_inode); |
355da1eb SW |
1012 | ceph_mdsc_put_request(req); |
1013 | return err; | |
1014 | } | |
1015 | ||
7221fe4c | 1016 | int __ceph_removexattr(struct dentry *dentry, const char *name) |
355da1eb SW |
1017 | { |
1018 | struct inode *inode = dentry->d_inode; | |
881a5fa2 | 1019 | struct ceph_vxattr *vxattr; |
355da1eb | 1020 | struct ceph_inode_info *ci = ceph_inode(inode); |
355da1eb SW |
1021 | int issued; |
1022 | int err; | |
83eb26af | 1023 | int required_blob_size; |
fca65b4a | 1024 | int dirty; |
355da1eb | 1025 | |
355da1eb SW |
1026 | if (!ceph_is_valid_xattr(name)) |
1027 | return -EOPNOTSUPP; | |
1028 | ||
06476a69 AE |
1029 | vxattr = ceph_match_vxattr(inode, name); |
1030 | if (vxattr && vxattr->readonly) | |
1031 | return -EOPNOTSUPP; | |
355da1eb | 1032 | |
d421acb1 SW |
1033 | /* pass any unhandled ceph.* xattrs through to the MDS */ |
1034 | if (!strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN)) | |
1035 | goto do_sync_unlocked; | |
1036 | ||
83eb26af | 1037 | err = -ENOMEM; |
be655596 | 1038 | spin_lock(&ci->i_ceph_lock); |
83eb26af | 1039 | retry: |
355da1eb SW |
1040 | issued = __ceph_caps_issued(ci, NULL); |
1041 | dout("removexattr %p issued %s\n", inode, ceph_cap_string(issued)); | |
1042 | ||
1043 | if (!(issued & CEPH_CAP_XATTR_EXCL)) | |
1044 | goto do_sync; | |
18fa8b3f | 1045 | __build_xattrs(inode); |
355da1eb | 1046 | |
83eb26af AE |
1047 | required_blob_size = __get_required_blob_size(ci, 0, 0); |
1048 | ||
1049 | if (!ci->i_xattrs.prealloc_blob || | |
1050 | required_blob_size > ci->i_xattrs.prealloc_blob->alloc_len) { | |
1051 | struct ceph_buffer *blob; | |
1052 | ||
1053 | spin_unlock(&ci->i_ceph_lock); | |
1054 | dout(" preaallocating new blob size=%d\n", required_blob_size); | |
1055 | blob = ceph_buffer_new(required_blob_size, GFP_NOFS); | |
1056 | if (!blob) | |
1057 | goto out; | |
1058 | spin_lock(&ci->i_ceph_lock); | |
1059 | if (ci->i_xattrs.prealloc_blob) | |
1060 | ceph_buffer_put(ci->i_xattrs.prealloc_blob); | |
1061 | ci->i_xattrs.prealloc_blob = blob; | |
1062 | goto retry; | |
1063 | } | |
1064 | ||
355da1eb | 1065 | err = __remove_xattr_by_name(ceph_inode(inode), name); |
18fa8b3f | 1066 | |
fca65b4a | 1067 | dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_XATTR_EXCL); |
355da1eb SW |
1068 | ci->i_xattrs.dirty = true; |
1069 | inode->i_ctime = CURRENT_TIME; | |
be655596 | 1070 | spin_unlock(&ci->i_ceph_lock); |
fca65b4a SW |
1071 | if (dirty) |
1072 | __mark_inode_dirty(inode, dirty); | |
355da1eb SW |
1073 | return err; |
1074 | do_sync: | |
be655596 | 1075 | spin_unlock(&ci->i_ceph_lock); |
d421acb1 | 1076 | do_sync_unlocked: |
355da1eb | 1077 | err = ceph_send_removexattr(dentry, name); |
83eb26af | 1078 | out: |
355da1eb SW |
1079 | return err; |
1080 | } | |
1081 | ||
7221fe4c GZ |
1082 | int ceph_removexattr(struct dentry *dentry, const char *name) |
1083 | { | |
1084 | if (ceph_snap(dentry->d_inode) != CEPH_NOSNAP) | |
1085 | return -EROFS; | |
1086 | ||
1087 | if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN)) | |
1088 | return generic_removexattr(dentry, name); | |
1089 | ||
1090 | return __ceph_removexattr(dentry, name); | |
1091 | } |