Commit | Line | Data |
---|---|---|
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> | |
4db658ea | 9 | #include <linux/posix_acl_xattr.h> |
5a0e3ad6 | 10 | #include <linux/slab.h> |
355da1eb | 11 | |
22891907 AE |
12 | #define XATTR_CEPH_PREFIX "ceph." |
13 | #define XATTR_CEPH_PREFIX_LEN (sizeof (XATTR_CEPH_PREFIX) - 1) | |
14 | ||
bcdfeb2e YZ |
15 | static int __remove_xattr(struct ceph_inode_info *ci, |
16 | struct ceph_inode_xattr *xattr); | |
17 | ||
7221fe4c GZ |
18 | /* |
19 | * List of handlers for synthetic system.* attributes. Other | |
20 | * attributes are handled directly. | |
21 | */ | |
22 | const struct xattr_handler *ceph_xattr_handlers[] = { | |
23 | #ifdef CONFIG_CEPH_FS_POSIX_ACL | |
4db658ea LT |
24 | &posix_acl_access_xattr_handler, |
25 | &posix_acl_default_xattr_handler, | |
7221fe4c GZ |
26 | #endif |
27 | NULL, | |
28 | }; | |
29 | ||
355da1eb SW |
30 | static bool ceph_is_valid_xattr(const char *name) |
31 | { | |
22891907 | 32 | return !strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN) || |
1a756278 | 33 | !strncmp(name, XATTR_SECURITY_PREFIX, |
355da1eb | 34 | XATTR_SECURITY_PREFIX_LEN) || |
7221fe4c | 35 | !strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN) || |
355da1eb SW |
36 | !strncmp(name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN) || |
37 | !strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN); | |
38 | } | |
39 | ||
40 | /* | |
41 | * These define virtual xattrs exposing the recursive directory | |
42 | * statistics and layout metadata. | |
43 | */ | |
881a5fa2 | 44 | struct ceph_vxattr { |
355da1eb | 45 | char *name; |
3ce6cd12 | 46 | size_t name_size; /* strlen(name) + 1 (for '\0') */ |
355da1eb SW |
47 | size_t (*getxattr_cb)(struct ceph_inode_info *ci, char *val, |
48 | size_t size); | |
8860147a | 49 | bool readonly, hidden; |
f36e4472 | 50 | bool (*exists_cb)(struct ceph_inode_info *ci); |
355da1eb SW |
51 | }; |
52 | ||
32ab0bd7 SW |
53 | /* layouts */ |
54 | ||
55 | static bool ceph_vxattrcb_layout_exists(struct ceph_inode_info *ci) | |
56 | { | |
57 | size_t s; | |
58 | char *p = (char *)&ci->i_layout; | |
59 | ||
60 | for (s = 0; s < sizeof(ci->i_layout); s++, p++) | |
61 | if (*p) | |
62 | return true; | |
63 | return false; | |
64 | } | |
65 | ||
66 | static size_t ceph_vxattrcb_layout(struct ceph_inode_info *ci, char *val, | |
67 | size_t size) | |
68 | { | |
69 | int ret; | |
70 | struct ceph_fs_client *fsc = ceph_sb_to_client(ci->vfs_inode.i_sb); | |
71 | struct ceph_osd_client *osdc = &fsc->client->osdc; | |
72 | s64 pool = ceph_file_layout_pg_pool(ci->i_layout); | |
73 | const char *pool_name; | |
74 | ||
75 | dout("ceph_vxattrcb_layout %p\n", &ci->vfs_inode); | |
76 | down_read(&osdc->map_sem); | |
77 | pool_name = ceph_pg_pool_name_by_id(osdc->osdmap, pool); | |
78 | if (pool_name) | |
79 | ret = snprintf(val, size, | |
80 | "stripe_unit=%lld stripe_count=%lld object_size=%lld pool=%s", | |
81 | (unsigned long long)ceph_file_layout_su(ci->i_layout), | |
82 | (unsigned long long)ceph_file_layout_stripe_count(ci->i_layout), | |
83 | (unsigned long long)ceph_file_layout_object_size(ci->i_layout), | |
84 | pool_name); | |
85 | else | |
86 | ret = snprintf(val, size, | |
87 | "stripe_unit=%lld stripe_count=%lld object_size=%lld pool=%lld", | |
88 | (unsigned long long)ceph_file_layout_su(ci->i_layout), | |
89 | (unsigned long long)ceph_file_layout_stripe_count(ci->i_layout), | |
90 | (unsigned long long)ceph_file_layout_object_size(ci->i_layout), | |
91 | (unsigned long long)pool); | |
92 | ||
93 | up_read(&osdc->map_sem); | |
94 | return ret; | |
95 | } | |
96 | ||
695b7119 SW |
97 | static size_t ceph_vxattrcb_layout_stripe_unit(struct ceph_inode_info *ci, |
98 | char *val, size_t size) | |
99 | { | |
100 | return snprintf(val, size, "%lld", | |
101 | (unsigned long long)ceph_file_layout_su(ci->i_layout)); | |
102 | } | |
103 | ||
104 | static size_t ceph_vxattrcb_layout_stripe_count(struct ceph_inode_info *ci, | |
105 | char *val, size_t size) | |
106 | { | |
107 | return snprintf(val, size, "%lld", | |
108 | (unsigned long long)ceph_file_layout_stripe_count(ci->i_layout)); | |
109 | } | |
110 | ||
111 | static size_t ceph_vxattrcb_layout_object_size(struct ceph_inode_info *ci, | |
112 | char *val, size_t size) | |
113 | { | |
114 | return snprintf(val, size, "%lld", | |
115 | (unsigned long long)ceph_file_layout_object_size(ci->i_layout)); | |
116 | } | |
117 | ||
118 | static size_t ceph_vxattrcb_layout_pool(struct ceph_inode_info *ci, | |
119 | char *val, size_t size) | |
120 | { | |
121 | int ret; | |
122 | struct ceph_fs_client *fsc = ceph_sb_to_client(ci->vfs_inode.i_sb); | |
123 | struct ceph_osd_client *osdc = &fsc->client->osdc; | |
124 | s64 pool = ceph_file_layout_pg_pool(ci->i_layout); | |
125 | const char *pool_name; | |
126 | ||
127 | down_read(&osdc->map_sem); | |
128 | pool_name = ceph_pg_pool_name_by_id(osdc->osdmap, pool); | |
129 | if (pool_name) | |
130 | ret = snprintf(val, size, "%s", pool_name); | |
131 | else | |
132 | ret = snprintf(val, size, "%lld", (unsigned long long)pool); | |
133 | up_read(&osdc->map_sem); | |
134 | return ret; | |
135 | } | |
136 | ||
355da1eb SW |
137 | /* directories */ |
138 | ||
aa4066ed | 139 | static size_t ceph_vxattrcb_dir_entries(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
140 | size_t size) |
141 | { | |
142 | return snprintf(val, size, "%lld", ci->i_files + ci->i_subdirs); | |
143 | } | |
144 | ||
aa4066ed | 145 | static size_t ceph_vxattrcb_dir_files(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
146 | size_t size) |
147 | { | |
148 | return snprintf(val, size, "%lld", ci->i_files); | |
149 | } | |
150 | ||
aa4066ed | 151 | static size_t ceph_vxattrcb_dir_subdirs(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
152 | size_t size) |
153 | { | |
154 | return snprintf(val, size, "%lld", ci->i_subdirs); | |
155 | } | |
156 | ||
aa4066ed | 157 | static size_t ceph_vxattrcb_dir_rentries(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
158 | size_t size) |
159 | { | |
160 | return snprintf(val, size, "%lld", ci->i_rfiles + ci->i_rsubdirs); | |
161 | } | |
162 | ||
aa4066ed | 163 | static size_t ceph_vxattrcb_dir_rfiles(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
164 | size_t size) |
165 | { | |
166 | return snprintf(val, size, "%lld", ci->i_rfiles); | |
167 | } | |
168 | ||
aa4066ed | 169 | static size_t ceph_vxattrcb_dir_rsubdirs(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
170 | size_t size) |
171 | { | |
172 | return snprintf(val, size, "%lld", ci->i_rsubdirs); | |
173 | } | |
174 | ||
aa4066ed | 175 | static size_t ceph_vxattrcb_dir_rbytes(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
176 | size_t size) |
177 | { | |
178 | return snprintf(val, size, "%lld", ci->i_rbytes); | |
179 | } | |
180 | ||
aa4066ed | 181 | static size_t ceph_vxattrcb_dir_rctime(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
182 | size_t size) |
183 | { | |
3489b42a | 184 | return snprintf(val, size, "%ld.09%ld", (long)ci->i_rctime.tv_sec, |
355da1eb SW |
185 | (long)ci->i_rctime.tv_nsec); |
186 | } | |
187 | ||
32ab0bd7 | 188 | |
eb788084 | 189 | #define CEPH_XATTR_NAME(_type, _name) XATTR_CEPH_PREFIX #_type "." #_name |
695b7119 SW |
190 | #define CEPH_XATTR_NAME2(_type, _name, _name2) \ |
191 | XATTR_CEPH_PREFIX #_type "." #_name "." #_name2 | |
eb788084 | 192 | |
8860147a SW |
193 | #define XATTR_NAME_CEPH(_type, _name) \ |
194 | { \ | |
195 | .name = CEPH_XATTR_NAME(_type, _name), \ | |
196 | .name_size = sizeof (CEPH_XATTR_NAME(_type, _name)), \ | |
197 | .getxattr_cb = ceph_vxattrcb_ ## _type ## _ ## _name, \ | |
198 | .readonly = true, \ | |
199 | .hidden = false, \ | |
f36e4472 | 200 | .exists_cb = NULL, \ |
8860147a | 201 | } |
695b7119 SW |
202 | #define XATTR_LAYOUT_FIELD(_type, _name, _field) \ |
203 | { \ | |
204 | .name = CEPH_XATTR_NAME2(_type, _name, _field), \ | |
205 | .name_size = sizeof (CEPH_XATTR_NAME2(_type, _name, _field)), \ | |
206 | .getxattr_cb = ceph_vxattrcb_ ## _name ## _ ## _field, \ | |
207 | .readonly = false, \ | |
208 | .hidden = true, \ | |
209 | .exists_cb = ceph_vxattrcb_layout_exists, \ | |
210 | } | |
eb788084 | 211 | |
881a5fa2 | 212 | static struct ceph_vxattr ceph_dir_vxattrs[] = { |
1f08f2b0 SW |
213 | { |
214 | .name = "ceph.dir.layout", | |
215 | .name_size = sizeof("ceph.dir.layout"), | |
216 | .getxattr_cb = ceph_vxattrcb_layout, | |
217 | .readonly = false, | |
218 | .hidden = false, | |
219 | .exists_cb = ceph_vxattrcb_layout_exists, | |
220 | }, | |
695b7119 SW |
221 | XATTR_LAYOUT_FIELD(dir, layout, stripe_unit), |
222 | XATTR_LAYOUT_FIELD(dir, layout, stripe_count), | |
223 | XATTR_LAYOUT_FIELD(dir, layout, object_size), | |
224 | XATTR_LAYOUT_FIELD(dir, layout, pool), | |
eb788084 AE |
225 | XATTR_NAME_CEPH(dir, entries), |
226 | XATTR_NAME_CEPH(dir, files), | |
227 | XATTR_NAME_CEPH(dir, subdirs), | |
228 | XATTR_NAME_CEPH(dir, rentries), | |
229 | XATTR_NAME_CEPH(dir, rfiles), | |
230 | XATTR_NAME_CEPH(dir, rsubdirs), | |
231 | XATTR_NAME_CEPH(dir, rbytes), | |
232 | XATTR_NAME_CEPH(dir, rctime), | |
2c3dd4ff | 233 | { .name = NULL, 0 } /* Required table terminator */ |
355da1eb | 234 | }; |
3ce6cd12 | 235 | static size_t ceph_dir_vxattrs_name_size; /* total size of all names */ |
355da1eb SW |
236 | |
237 | /* files */ | |
238 | ||
881a5fa2 | 239 | static struct ceph_vxattr ceph_file_vxattrs[] = { |
32ab0bd7 SW |
240 | { |
241 | .name = "ceph.file.layout", | |
242 | .name_size = sizeof("ceph.file.layout"), | |
243 | .getxattr_cb = ceph_vxattrcb_layout, | |
244 | .readonly = false, | |
245 | .hidden = false, | |
246 | .exists_cb = ceph_vxattrcb_layout_exists, | |
247 | }, | |
695b7119 SW |
248 | XATTR_LAYOUT_FIELD(file, layout, stripe_unit), |
249 | XATTR_LAYOUT_FIELD(file, layout, stripe_count), | |
250 | XATTR_LAYOUT_FIELD(file, layout, object_size), | |
251 | XATTR_LAYOUT_FIELD(file, layout, pool), | |
2c3dd4ff | 252 | { .name = NULL, 0 } /* Required table terminator */ |
355da1eb | 253 | }; |
3ce6cd12 | 254 | static size_t ceph_file_vxattrs_name_size; /* total size of all names */ |
355da1eb | 255 | |
881a5fa2 | 256 | static struct ceph_vxattr *ceph_inode_vxattrs(struct inode *inode) |
355da1eb SW |
257 | { |
258 | if (S_ISDIR(inode->i_mode)) | |
259 | return ceph_dir_vxattrs; | |
260 | else if (S_ISREG(inode->i_mode)) | |
261 | return ceph_file_vxattrs; | |
262 | return NULL; | |
263 | } | |
264 | ||
3ce6cd12 AE |
265 | static size_t ceph_vxattrs_name_size(struct ceph_vxattr *vxattrs) |
266 | { | |
267 | if (vxattrs == ceph_dir_vxattrs) | |
268 | return ceph_dir_vxattrs_name_size; | |
269 | if (vxattrs == ceph_file_vxattrs) | |
270 | return ceph_file_vxattrs_name_size; | |
271 | BUG(); | |
272 | ||
273 | return 0; | |
274 | } | |
275 | ||
276 | /* | |
277 | * Compute the aggregate size (including terminating '\0') of all | |
278 | * virtual extended attribute names in the given vxattr table. | |
279 | */ | |
280 | static size_t __init vxattrs_name_size(struct ceph_vxattr *vxattrs) | |
281 | { | |
282 | struct ceph_vxattr *vxattr; | |
283 | size_t size = 0; | |
284 | ||
285 | for (vxattr = vxattrs; vxattr->name; vxattr++) | |
8860147a SW |
286 | if (!vxattr->hidden) |
287 | size += vxattr->name_size; | |
3ce6cd12 AE |
288 | |
289 | return size; | |
290 | } | |
291 | ||
292 | /* Routines called at initialization and exit time */ | |
293 | ||
294 | void __init ceph_xattr_init(void) | |
295 | { | |
296 | ceph_dir_vxattrs_name_size = vxattrs_name_size(ceph_dir_vxattrs); | |
297 | ceph_file_vxattrs_name_size = vxattrs_name_size(ceph_file_vxattrs); | |
298 | } | |
299 | ||
300 | void ceph_xattr_exit(void) | |
301 | { | |
302 | ceph_dir_vxattrs_name_size = 0; | |
303 | ceph_file_vxattrs_name_size = 0; | |
304 | } | |
305 | ||
881a5fa2 | 306 | static struct ceph_vxattr *ceph_match_vxattr(struct inode *inode, |
355da1eb SW |
307 | const char *name) |
308 | { | |
881a5fa2 | 309 | struct ceph_vxattr *vxattr = ceph_inode_vxattrs(inode); |
06476a69 AE |
310 | |
311 | if (vxattr) { | |
312 | while (vxattr->name) { | |
313 | if (!strcmp(vxattr->name, name)) | |
314 | return vxattr; | |
315 | vxattr++; | |
316 | } | |
317 | } | |
318 | ||
355da1eb SW |
319 | return NULL; |
320 | } | |
321 | ||
322 | static int __set_xattr(struct ceph_inode_info *ci, | |
323 | const char *name, int name_len, | |
324 | const char *val, int val_len, | |
fbc0b970 | 325 | int flags, int update_xattr, |
355da1eb SW |
326 | struct ceph_inode_xattr **newxattr) |
327 | { | |
328 | struct rb_node **p; | |
329 | struct rb_node *parent = NULL; | |
330 | struct ceph_inode_xattr *xattr = NULL; | |
331 | int c; | |
332 | int new = 0; | |
333 | ||
334 | p = &ci->i_xattrs.index.rb_node; | |
335 | while (*p) { | |
336 | parent = *p; | |
337 | xattr = rb_entry(parent, struct ceph_inode_xattr, node); | |
338 | c = strncmp(name, xattr->name, min(name_len, xattr->name_len)); | |
339 | if (c < 0) | |
340 | p = &(*p)->rb_left; | |
341 | else if (c > 0) | |
342 | p = &(*p)->rb_right; | |
343 | else { | |
344 | if (name_len == xattr->name_len) | |
345 | break; | |
346 | else if (name_len < xattr->name_len) | |
347 | p = &(*p)->rb_left; | |
348 | else | |
349 | p = &(*p)->rb_right; | |
350 | } | |
351 | xattr = NULL; | |
352 | } | |
353 | ||
fbc0b970 YZ |
354 | if (update_xattr) { |
355 | int err = 0; | |
356 | if (xattr && (flags & XATTR_CREATE)) | |
357 | err = -EEXIST; | |
358 | else if (!xattr && (flags & XATTR_REPLACE)) | |
359 | err = -ENODATA; | |
360 | if (err) { | |
361 | kfree(name); | |
362 | kfree(val); | |
363 | return err; | |
364 | } | |
bcdfeb2e YZ |
365 | if (update_xattr < 0) { |
366 | if (xattr) | |
367 | __remove_xattr(ci, xattr); | |
368 | kfree(name); | |
369 | return 0; | |
370 | } | |
fbc0b970 YZ |
371 | } |
372 | ||
355da1eb SW |
373 | if (!xattr) { |
374 | new = 1; | |
375 | xattr = *newxattr; | |
376 | xattr->name = name; | |
377 | xattr->name_len = name_len; | |
fbc0b970 | 378 | xattr->should_free_name = update_xattr; |
355da1eb SW |
379 | |
380 | ci->i_xattrs.count++; | |
381 | dout("__set_xattr count=%d\n", ci->i_xattrs.count); | |
382 | } else { | |
383 | kfree(*newxattr); | |
384 | *newxattr = NULL; | |
385 | if (xattr->should_free_val) | |
386 | kfree((void *)xattr->val); | |
387 | ||
fbc0b970 | 388 | if (update_xattr) { |
355da1eb SW |
389 | kfree((void *)name); |
390 | name = xattr->name; | |
391 | } | |
392 | ci->i_xattrs.names_size -= xattr->name_len; | |
393 | ci->i_xattrs.vals_size -= xattr->val_len; | |
394 | } | |
355da1eb SW |
395 | ci->i_xattrs.names_size += name_len; |
396 | ci->i_xattrs.vals_size += val_len; | |
397 | if (val) | |
398 | xattr->val = val; | |
399 | else | |
400 | xattr->val = ""; | |
401 | ||
402 | xattr->val_len = val_len; | |
fbc0b970 YZ |
403 | xattr->dirty = update_xattr; |
404 | xattr->should_free_val = (val && update_xattr); | |
355da1eb SW |
405 | |
406 | if (new) { | |
407 | rb_link_node(&xattr->node, parent, p); | |
408 | rb_insert_color(&xattr->node, &ci->i_xattrs.index); | |
409 | dout("__set_xattr_val p=%p\n", p); | |
410 | } | |
411 | ||
412 | dout("__set_xattr_val added %llx.%llx xattr %p %s=%.*s\n", | |
413 | ceph_vinop(&ci->vfs_inode), xattr, name, val_len, val); | |
414 | ||
415 | return 0; | |
416 | } | |
417 | ||
418 | static struct ceph_inode_xattr *__get_xattr(struct ceph_inode_info *ci, | |
419 | const char *name) | |
420 | { | |
421 | struct rb_node **p; | |
422 | struct rb_node *parent = NULL; | |
423 | struct ceph_inode_xattr *xattr = NULL; | |
17db143f | 424 | int name_len = strlen(name); |
355da1eb SW |
425 | int c; |
426 | ||
427 | p = &ci->i_xattrs.index.rb_node; | |
428 | while (*p) { | |
429 | parent = *p; | |
430 | xattr = rb_entry(parent, struct ceph_inode_xattr, node); | |
431 | c = strncmp(name, xattr->name, xattr->name_len); | |
17db143f SW |
432 | if (c == 0 && name_len > xattr->name_len) |
433 | c = 1; | |
355da1eb SW |
434 | if (c < 0) |
435 | p = &(*p)->rb_left; | |
436 | else if (c > 0) | |
437 | p = &(*p)->rb_right; | |
438 | else { | |
439 | dout("__get_xattr %s: found %.*s\n", name, | |
440 | xattr->val_len, xattr->val); | |
441 | return xattr; | |
442 | } | |
443 | } | |
444 | ||
445 | dout("__get_xattr %s: not found\n", name); | |
446 | ||
447 | return NULL; | |
448 | } | |
449 | ||
450 | static void __free_xattr(struct ceph_inode_xattr *xattr) | |
451 | { | |
452 | BUG_ON(!xattr); | |
453 | ||
454 | if (xattr->should_free_name) | |
455 | kfree((void *)xattr->name); | |
456 | if (xattr->should_free_val) | |
457 | kfree((void *)xattr->val); | |
458 | ||
459 | kfree(xattr); | |
460 | } | |
461 | ||
462 | static int __remove_xattr(struct ceph_inode_info *ci, | |
463 | struct ceph_inode_xattr *xattr) | |
464 | { | |
465 | if (!xattr) | |
524186ac | 466 | return -ENODATA; |
355da1eb SW |
467 | |
468 | rb_erase(&xattr->node, &ci->i_xattrs.index); | |
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 | ci->i_xattrs.names_size -= xattr->name_len; | |
476 | ci->i_xattrs.vals_size -= xattr->val_len; | |
477 | ci->i_xattrs.count--; | |
478 | kfree(xattr); | |
479 | ||
480 | return 0; | |
481 | } | |
482 | ||
483 | static int __remove_xattr_by_name(struct ceph_inode_info *ci, | |
484 | const char *name) | |
485 | { | |
486 | struct rb_node **p; | |
487 | struct ceph_inode_xattr *xattr; | |
488 | int err; | |
489 | ||
490 | p = &ci->i_xattrs.index.rb_node; | |
491 | xattr = __get_xattr(ci, name); | |
492 | err = __remove_xattr(ci, xattr); | |
493 | return err; | |
494 | } | |
495 | ||
496 | static char *__copy_xattr_names(struct ceph_inode_info *ci, | |
497 | char *dest) | |
498 | { | |
499 | struct rb_node *p; | |
500 | struct ceph_inode_xattr *xattr = NULL; | |
501 | ||
502 | p = rb_first(&ci->i_xattrs.index); | |
503 | dout("__copy_xattr_names count=%d\n", ci->i_xattrs.count); | |
504 | ||
505 | while (p) { | |
506 | xattr = rb_entry(p, struct ceph_inode_xattr, node); | |
507 | memcpy(dest, xattr->name, xattr->name_len); | |
508 | dest[xattr->name_len] = '\0'; | |
509 | ||
510 | dout("dest=%s %p (%s) (%d/%d)\n", dest, xattr, xattr->name, | |
511 | xattr->name_len, ci->i_xattrs.names_size); | |
512 | ||
513 | dest += xattr->name_len + 1; | |
514 | p = rb_next(p); | |
515 | } | |
516 | ||
517 | return dest; | |
518 | } | |
519 | ||
520 | void __ceph_destroy_xattrs(struct ceph_inode_info *ci) | |
521 | { | |
522 | struct rb_node *p, *tmp; | |
523 | struct ceph_inode_xattr *xattr = NULL; | |
524 | ||
525 | p = rb_first(&ci->i_xattrs.index); | |
526 | ||
527 | dout("__ceph_destroy_xattrs p=%p\n", p); | |
528 | ||
529 | while (p) { | |
530 | xattr = rb_entry(p, struct ceph_inode_xattr, node); | |
531 | tmp = p; | |
532 | p = rb_next(tmp); | |
533 | dout("__ceph_destroy_xattrs next p=%p (%.*s)\n", p, | |
534 | xattr->name_len, xattr->name); | |
535 | rb_erase(tmp, &ci->i_xattrs.index); | |
536 | ||
537 | __free_xattr(xattr); | |
538 | } | |
539 | ||
540 | ci->i_xattrs.names_size = 0; | |
541 | ci->i_xattrs.vals_size = 0; | |
542 | ci->i_xattrs.index_version = 0; | |
543 | ci->i_xattrs.count = 0; | |
544 | ci->i_xattrs.index = RB_ROOT; | |
545 | } | |
546 | ||
547 | static int __build_xattrs(struct inode *inode) | |
be655596 SW |
548 | __releases(ci->i_ceph_lock) |
549 | __acquires(ci->i_ceph_lock) | |
355da1eb SW |
550 | { |
551 | u32 namelen; | |
552 | u32 numattr = 0; | |
553 | void *p, *end; | |
554 | u32 len; | |
555 | const char *name, *val; | |
556 | struct ceph_inode_info *ci = ceph_inode(inode); | |
557 | int xattr_version; | |
558 | struct ceph_inode_xattr **xattrs = NULL; | |
63ff78b2 | 559 | int err = 0; |
355da1eb SW |
560 | int i; |
561 | ||
562 | dout("__build_xattrs() len=%d\n", | |
563 | ci->i_xattrs.blob ? (int)ci->i_xattrs.blob->vec.iov_len : 0); | |
564 | ||
565 | if (ci->i_xattrs.index_version >= ci->i_xattrs.version) | |
566 | return 0; /* already built */ | |
567 | ||
568 | __ceph_destroy_xattrs(ci); | |
569 | ||
570 | start: | |
571 | /* updated internal xattr rb tree */ | |
572 | if (ci->i_xattrs.blob && ci->i_xattrs.blob->vec.iov_len > 4) { | |
573 | p = ci->i_xattrs.blob->vec.iov_base; | |
574 | end = p + ci->i_xattrs.blob->vec.iov_len; | |
575 | ceph_decode_32_safe(&p, end, numattr, bad); | |
576 | xattr_version = ci->i_xattrs.version; | |
be655596 | 577 | spin_unlock(&ci->i_ceph_lock); |
355da1eb SW |
578 | |
579 | xattrs = kcalloc(numattr, sizeof(struct ceph_xattr *), | |
580 | GFP_NOFS); | |
581 | err = -ENOMEM; | |
582 | if (!xattrs) | |
583 | goto bad_lock; | |
584 | memset(xattrs, 0, numattr*sizeof(struct ceph_xattr *)); | |
585 | for (i = 0; i < numattr; i++) { | |
586 | xattrs[i] = kmalloc(sizeof(struct ceph_inode_xattr), | |
587 | GFP_NOFS); | |
588 | if (!xattrs[i]) | |
589 | goto bad_lock; | |
590 | } | |
591 | ||
be655596 | 592 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
593 | if (ci->i_xattrs.version != xattr_version) { |
594 | /* lost a race, retry */ | |
595 | for (i = 0; i < numattr; i++) | |
596 | kfree(xattrs[i]); | |
597 | kfree(xattrs); | |
21ec6ffa | 598 | xattrs = NULL; |
355da1eb SW |
599 | goto start; |
600 | } | |
601 | err = -EIO; | |
602 | while (numattr--) { | |
603 | ceph_decode_32_safe(&p, end, len, bad); | |
604 | namelen = len; | |
605 | name = p; | |
606 | p += len; | |
607 | ceph_decode_32_safe(&p, end, len, bad); | |
608 | val = p; | |
609 | p += len; | |
610 | ||
611 | err = __set_xattr(ci, name, namelen, val, len, | |
fbc0b970 | 612 | 0, 0, &xattrs[numattr]); |
355da1eb SW |
613 | |
614 | if (err < 0) | |
615 | goto bad; | |
616 | } | |
617 | kfree(xattrs); | |
618 | } | |
619 | ci->i_xattrs.index_version = ci->i_xattrs.version; | |
620 | ci->i_xattrs.dirty = false; | |
621 | ||
622 | return err; | |
623 | bad_lock: | |
be655596 | 624 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
625 | bad: |
626 | if (xattrs) { | |
627 | for (i = 0; i < numattr; i++) | |
628 | kfree(xattrs[i]); | |
629 | kfree(xattrs); | |
630 | } | |
631 | ci->i_xattrs.names_size = 0; | |
632 | return err; | |
633 | } | |
634 | ||
635 | static int __get_required_blob_size(struct ceph_inode_info *ci, int name_size, | |
636 | int val_size) | |
637 | { | |
638 | /* | |
639 | * 4 bytes for the length, and additional 4 bytes per each xattr name, | |
640 | * 4 bytes per each value | |
641 | */ | |
642 | int size = 4 + ci->i_xattrs.count*(4 + 4) + | |
643 | ci->i_xattrs.names_size + | |
644 | ci->i_xattrs.vals_size; | |
645 | dout("__get_required_blob_size c=%d names.size=%d vals.size=%d\n", | |
646 | ci->i_xattrs.count, ci->i_xattrs.names_size, | |
647 | ci->i_xattrs.vals_size); | |
648 | ||
649 | if (name_size) | |
650 | size += 4 + 4 + name_size + val_size; | |
651 | ||
652 | return size; | |
653 | } | |
654 | ||
655 | /* | |
656 | * If there are dirty xattrs, reencode xattrs into the prealloc_blob | |
657 | * and swap into place. | |
658 | */ | |
659 | void __ceph_build_xattrs_blob(struct ceph_inode_info *ci) | |
660 | { | |
661 | struct rb_node *p; | |
662 | struct ceph_inode_xattr *xattr = NULL; | |
663 | void *dest; | |
664 | ||
665 | dout("__build_xattrs_blob %p\n", &ci->vfs_inode); | |
666 | if (ci->i_xattrs.dirty) { | |
667 | int need = __get_required_blob_size(ci, 0, 0); | |
668 | ||
669 | BUG_ON(need > ci->i_xattrs.prealloc_blob->alloc_len); | |
670 | ||
671 | p = rb_first(&ci->i_xattrs.index); | |
672 | dest = ci->i_xattrs.prealloc_blob->vec.iov_base; | |
673 | ||
674 | ceph_encode_32(&dest, ci->i_xattrs.count); | |
675 | while (p) { | |
676 | xattr = rb_entry(p, struct ceph_inode_xattr, node); | |
677 | ||
678 | ceph_encode_32(&dest, xattr->name_len); | |
679 | memcpy(dest, xattr->name, xattr->name_len); | |
680 | dest += xattr->name_len; | |
681 | ceph_encode_32(&dest, xattr->val_len); | |
682 | memcpy(dest, xattr->val, xattr->val_len); | |
683 | dest += xattr->val_len; | |
684 | ||
685 | p = rb_next(p); | |
686 | } | |
687 | ||
688 | /* adjust buffer len; it may be larger than we need */ | |
689 | ci->i_xattrs.prealloc_blob->vec.iov_len = | |
690 | dest - ci->i_xattrs.prealloc_blob->vec.iov_base; | |
691 | ||
b6c1d5b8 SW |
692 | if (ci->i_xattrs.blob) |
693 | ceph_buffer_put(ci->i_xattrs.blob); | |
355da1eb SW |
694 | ci->i_xattrs.blob = ci->i_xattrs.prealloc_blob; |
695 | ci->i_xattrs.prealloc_blob = NULL; | |
696 | ci->i_xattrs.dirty = false; | |
4a625be4 | 697 | ci->i_xattrs.version++; |
355da1eb SW |
698 | } |
699 | } | |
700 | ||
7221fe4c | 701 | ssize_t __ceph_getxattr(struct inode *inode, const char *name, void *value, |
355da1eb SW |
702 | size_t size) |
703 | { | |
355da1eb | 704 | struct ceph_inode_info *ci = ceph_inode(inode); |
355da1eb SW |
705 | int err; |
706 | struct ceph_inode_xattr *xattr; | |
881a5fa2 | 707 | struct ceph_vxattr *vxattr = NULL; |
355da1eb SW |
708 | |
709 | if (!ceph_is_valid_xattr(name)) | |
710 | return -ENODATA; | |
711 | ||
0bee82fb SW |
712 | /* let's see if a virtual xattr was requested */ |
713 | vxattr = ceph_match_vxattr(inode, name); | |
714 | if (vxattr && !(vxattr->exists_cb && !vxattr->exists_cb(ci))) { | |
715 | err = vxattr->getxattr_cb(ci, value, size); | |
a1dc1937 | 716 | return err; |
0bee82fb SW |
717 | } |
718 | ||
a1dc1937 | 719 | spin_lock(&ci->i_ceph_lock); |
720 | dout("getxattr %p ver=%lld index_ver=%lld\n", inode, | |
721 | ci->i_xattrs.version, ci->i_xattrs.index_version); | |
722 | ||
355da1eb SW |
723 | if (__ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 1) && |
724 | (ci->i_xattrs.index_version >= ci->i_xattrs.version)) { | |
725 | goto get_xattr; | |
726 | } else { | |
be655596 | 727 | spin_unlock(&ci->i_ceph_lock); |
355da1eb SW |
728 | /* get xattrs from mds (if we don't already have them) */ |
729 | err = ceph_do_getattr(inode, CEPH_STAT_CAP_XATTR); | |
730 | if (err) | |
731 | return err; | |
732 | } | |
733 | ||
be655596 | 734 | spin_lock(&ci->i_ceph_lock); |
355da1eb | 735 | |
355da1eb SW |
736 | err = __build_xattrs(inode); |
737 | if (err < 0) | |
738 | goto out; | |
739 | ||
740 | get_xattr: | |
741 | err = -ENODATA; /* == ENOATTR */ | |
742 | xattr = __get_xattr(ci, name); | |
0bee82fb | 743 | if (!xattr) |
355da1eb | 744 | goto out; |
355da1eb SW |
745 | |
746 | err = -ERANGE; | |
747 | if (size && size < xattr->val_len) | |
748 | goto out; | |
749 | ||
750 | err = xattr->val_len; | |
751 | if (size == 0) | |
752 | goto out; | |
753 | ||
754 | memcpy(value, xattr->val, xattr->val_len); | |
755 | ||
756 | out: | |
be655596 | 757 | spin_unlock(&ci->i_ceph_lock); |
355da1eb SW |
758 | return err; |
759 | } | |
760 | ||
7221fe4c GZ |
761 | ssize_t ceph_getxattr(struct dentry *dentry, const char *name, void *value, |
762 | size_t size) | |
763 | { | |
764 | if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN)) | |
765 | return generic_getxattr(dentry, name, value, size); | |
766 | ||
767 | return __ceph_getxattr(dentry->d_inode, name, value, size); | |
768 | } | |
769 | ||
355da1eb SW |
770 | ssize_t ceph_listxattr(struct dentry *dentry, char *names, size_t size) |
771 | { | |
772 | struct inode *inode = dentry->d_inode; | |
773 | struct ceph_inode_info *ci = ceph_inode(inode); | |
881a5fa2 | 774 | struct ceph_vxattr *vxattrs = ceph_inode_vxattrs(inode); |
355da1eb SW |
775 | u32 vir_namelen = 0; |
776 | u32 namelen; | |
777 | int err; | |
778 | u32 len; | |
779 | int i; | |
780 | ||
be655596 | 781 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
782 | dout("listxattr %p ver=%lld index_ver=%lld\n", inode, |
783 | ci->i_xattrs.version, ci->i_xattrs.index_version); | |
784 | ||
785 | if (__ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 1) && | |
bddfa3cc | 786 | (ci->i_xattrs.index_version >= ci->i_xattrs.version)) { |
355da1eb SW |
787 | goto list_xattr; |
788 | } else { | |
be655596 | 789 | spin_unlock(&ci->i_ceph_lock); |
355da1eb SW |
790 | err = ceph_do_getattr(inode, CEPH_STAT_CAP_XATTR); |
791 | if (err) | |
792 | return err; | |
793 | } | |
794 | ||
be655596 | 795 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
796 | |
797 | err = __build_xattrs(inode); | |
798 | if (err < 0) | |
799 | goto out; | |
800 | ||
801 | list_xattr: | |
3ce6cd12 AE |
802 | /* |
803 | * Start with virtual dir xattr names (if any) (including | |
804 | * terminating '\0' characters for each). | |
805 | */ | |
806 | vir_namelen = ceph_vxattrs_name_size(vxattrs); | |
807 | ||
355da1eb | 808 | /* adding 1 byte per each variable due to the null termination */ |
b65917dd | 809 | namelen = ci->i_xattrs.names_size + ci->i_xattrs.count; |
355da1eb | 810 | err = -ERANGE; |
b65917dd | 811 | if (size && vir_namelen + namelen > size) |
355da1eb SW |
812 | goto out; |
813 | ||
b65917dd | 814 | err = namelen + vir_namelen; |
355da1eb SW |
815 | if (size == 0) |
816 | goto out; | |
817 | ||
818 | names = __copy_xattr_names(ci, names); | |
819 | ||
820 | /* virtual xattr names, too */ | |
b65917dd SW |
821 | err = namelen; |
822 | if (vxattrs) { | |
355da1eb | 823 | for (i = 0; vxattrs[i].name; i++) { |
b65917dd SW |
824 | if (!vxattrs[i].hidden && |
825 | !(vxattrs[i].exists_cb && | |
826 | !vxattrs[i].exists_cb(ci))) { | |
827 | len = sprintf(names, "%s", vxattrs[i].name); | |
828 | names += len + 1; | |
829 | err += len + 1; | |
830 | } | |
355da1eb | 831 | } |
b65917dd | 832 | } |
355da1eb SW |
833 | |
834 | out: | |
be655596 | 835 | spin_unlock(&ci->i_ceph_lock); |
355da1eb SW |
836 | return err; |
837 | } | |
838 | ||
839 | static int ceph_sync_setxattr(struct dentry *dentry, const char *name, | |
840 | const char *value, size_t size, int flags) | |
841 | { | |
3d14c5d2 | 842 | struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb); |
355da1eb SW |
843 | struct inode *inode = dentry->d_inode; |
844 | struct ceph_inode_info *ci = ceph_inode(inode); | |
5f21c96d | 845 | struct inode *parent_inode; |
355da1eb | 846 | struct ceph_mds_request *req; |
3d14c5d2 | 847 | struct ceph_mds_client *mdsc = fsc->mdsc; |
355da1eb SW |
848 | int err; |
849 | int i, nr_pages; | |
850 | struct page **pages = NULL; | |
851 | void *kaddr; | |
852 | ||
853 | /* copy value into some pages */ | |
854 | nr_pages = calc_pages_for(0, size); | |
855 | if (nr_pages) { | |
856 | pages = kmalloc(sizeof(pages[0])*nr_pages, GFP_NOFS); | |
857 | if (!pages) | |
858 | return -ENOMEM; | |
859 | err = -ENOMEM; | |
860 | for (i = 0; i < nr_pages; i++) { | |
31459fe4 | 861 | pages[i] = __page_cache_alloc(GFP_NOFS); |
355da1eb SW |
862 | if (!pages[i]) { |
863 | nr_pages = i; | |
864 | goto out; | |
865 | } | |
866 | kaddr = kmap(pages[i]); | |
867 | memcpy(kaddr, value + i*PAGE_CACHE_SIZE, | |
868 | min(PAGE_CACHE_SIZE, size-i*PAGE_CACHE_SIZE)); | |
869 | } | |
870 | } | |
871 | ||
872 | dout("setxattr value=%.*s\n", (int)size, value); | |
873 | ||
bcdfeb2e YZ |
874 | if (!value) |
875 | flags |= CEPH_XATTR_REMOVE; | |
876 | ||
355da1eb SW |
877 | /* do request */ |
878 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETXATTR, | |
879 | USE_AUTH_MDS); | |
60d87733 JL |
880 | if (IS_ERR(req)) { |
881 | err = PTR_ERR(req); | |
882 | goto out; | |
883 | } | |
70b666c3 SW |
884 | req->r_inode = inode; |
885 | ihold(inode); | |
355da1eb SW |
886 | req->r_inode_drop = CEPH_CAP_XATTR_SHARED; |
887 | req->r_num_caps = 1; | |
888 | req->r_args.setxattr.flags = cpu_to_le32(flags); | |
889 | req->r_path2 = kstrdup(name, GFP_NOFS); | |
890 | ||
891 | req->r_pages = pages; | |
892 | req->r_num_pages = nr_pages; | |
893 | req->r_data_len = size; | |
894 | ||
895 | dout("xattr.ver (before): %lld\n", ci->i_xattrs.version); | |
5f21c96d | 896 | parent_inode = ceph_get_dentry_parent_inode(dentry); |
355da1eb | 897 | err = ceph_mdsc_do_request(mdsc, parent_inode, req); |
5f21c96d | 898 | iput(parent_inode); |
355da1eb SW |
899 | ceph_mdsc_put_request(req); |
900 | dout("xattr.ver (after): %lld\n", ci->i_xattrs.version); | |
901 | ||
902 | out: | |
903 | if (pages) { | |
904 | for (i = 0; i < nr_pages; i++) | |
905 | __free_page(pages[i]); | |
906 | kfree(pages); | |
907 | } | |
908 | return err; | |
909 | } | |
910 | ||
7221fe4c GZ |
911 | int __ceph_setxattr(struct dentry *dentry, const char *name, |
912 | const void *value, size_t size, int flags) | |
355da1eb SW |
913 | { |
914 | struct inode *inode = dentry->d_inode; | |
881a5fa2 | 915 | struct ceph_vxattr *vxattr; |
355da1eb | 916 | struct ceph_inode_info *ci = ceph_inode(inode); |
18fa8b3f | 917 | int issued; |
355da1eb | 918 | int err; |
fbc0b970 | 919 | int dirty = 0; |
355da1eb SW |
920 | int name_len = strlen(name); |
921 | int val_len = size; | |
922 | char *newname = NULL; | |
923 | char *newval = NULL; | |
924 | struct ceph_inode_xattr *xattr = NULL; | |
355da1eb SW |
925 | int required_blob_size; |
926 | ||
355da1eb SW |
927 | if (!ceph_is_valid_xattr(name)) |
928 | return -EOPNOTSUPP; | |
929 | ||
06476a69 AE |
930 | vxattr = ceph_match_vxattr(inode, name); |
931 | if (vxattr && vxattr->readonly) | |
932 | return -EOPNOTSUPP; | |
355da1eb | 933 | |
3adf654d SW |
934 | /* pass any unhandled ceph.* xattrs through to the MDS */ |
935 | if (!strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN)) | |
936 | goto do_sync_unlocked; | |
937 | ||
355da1eb SW |
938 | /* preallocate memory for xattr name, value, index node */ |
939 | err = -ENOMEM; | |
61413c2f | 940 | newname = kmemdup(name, name_len + 1, GFP_NOFS); |
355da1eb SW |
941 | if (!newname) |
942 | goto out; | |
355da1eb SW |
943 | |
944 | if (val_len) { | |
b829c195 | 945 | newval = kmemdup(value, val_len, GFP_NOFS); |
355da1eb SW |
946 | if (!newval) |
947 | goto out; | |
355da1eb SW |
948 | } |
949 | ||
950 | xattr = kmalloc(sizeof(struct ceph_inode_xattr), GFP_NOFS); | |
951 | if (!xattr) | |
952 | goto out; | |
953 | ||
be655596 | 954 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
955 | retry: |
956 | issued = __ceph_caps_issued(ci, NULL); | |
18fa8b3f | 957 | dout("setxattr %p issued %s\n", inode, ceph_cap_string(issued)); |
355da1eb SW |
958 | if (!(issued & CEPH_CAP_XATTR_EXCL)) |
959 | goto do_sync; | |
960 | __build_xattrs(inode); | |
961 | ||
962 | required_blob_size = __get_required_blob_size(ci, name_len, val_len); | |
963 | ||
964 | if (!ci->i_xattrs.prealloc_blob || | |
965 | required_blob_size > ci->i_xattrs.prealloc_blob->alloc_len) { | |
18fa8b3f | 966 | struct ceph_buffer *blob; |
355da1eb | 967 | |
be655596 | 968 | spin_unlock(&ci->i_ceph_lock); |
355da1eb | 969 | dout(" preaallocating new blob size=%d\n", required_blob_size); |
b6c1d5b8 | 970 | blob = ceph_buffer_new(required_blob_size, GFP_NOFS); |
355da1eb SW |
971 | if (!blob) |
972 | goto out; | |
be655596 | 973 | spin_lock(&ci->i_ceph_lock); |
b6c1d5b8 SW |
974 | if (ci->i_xattrs.prealloc_blob) |
975 | ceph_buffer_put(ci->i_xattrs.prealloc_blob); | |
355da1eb SW |
976 | ci->i_xattrs.prealloc_blob = blob; |
977 | goto retry; | |
978 | } | |
979 | ||
bcdfeb2e YZ |
980 | err = __set_xattr(ci, newname, name_len, newval, val_len, |
981 | flags, value ? 1 : -1, &xattr); | |
18fa8b3f | 982 | |
fbc0b970 YZ |
983 | if (!err) { |
984 | dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_XATTR_EXCL); | |
985 | ci->i_xattrs.dirty = true; | |
986 | inode->i_ctime = CURRENT_TIME; | |
987 | } | |
18fa8b3f | 988 | |
be655596 | 989 | spin_unlock(&ci->i_ceph_lock); |
fca65b4a SW |
990 | if (dirty) |
991 | __mark_inode_dirty(inode, dirty); | |
355da1eb SW |
992 | return err; |
993 | ||
994 | do_sync: | |
be655596 | 995 | spin_unlock(&ci->i_ceph_lock); |
3adf654d | 996 | do_sync_unlocked: |
355da1eb SW |
997 | err = ceph_sync_setxattr(dentry, name, value, size, flags); |
998 | out: | |
999 | kfree(newname); | |
1000 | kfree(newval); | |
1001 | kfree(xattr); | |
1002 | return err; | |
1003 | } | |
1004 | ||
7221fe4c GZ |
1005 | int ceph_setxattr(struct dentry *dentry, const char *name, |
1006 | const void *value, size_t size, int flags) | |
1007 | { | |
1008 | if (ceph_snap(dentry->d_inode) != CEPH_NOSNAP) | |
1009 | return -EROFS; | |
1010 | ||
1011 | if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN)) | |
1012 | return generic_setxattr(dentry, name, value, size, flags); | |
1013 | ||
1014 | return __ceph_setxattr(dentry, name, value, size, flags); | |
1015 | } | |
1016 | ||
355da1eb SW |
1017 | static int ceph_send_removexattr(struct dentry *dentry, const char *name) |
1018 | { | |
3d14c5d2 YS |
1019 | struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb); |
1020 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
355da1eb | 1021 | struct inode *inode = dentry->d_inode; |
5f21c96d | 1022 | struct inode *parent_inode; |
355da1eb SW |
1023 | struct ceph_mds_request *req; |
1024 | int err; | |
1025 | ||
1026 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_RMXATTR, | |
1027 | USE_AUTH_MDS); | |
1028 | if (IS_ERR(req)) | |
1029 | return PTR_ERR(req); | |
70b666c3 SW |
1030 | req->r_inode = inode; |
1031 | ihold(inode); | |
355da1eb SW |
1032 | req->r_inode_drop = CEPH_CAP_XATTR_SHARED; |
1033 | req->r_num_caps = 1; | |
1034 | req->r_path2 = kstrdup(name, GFP_NOFS); | |
1035 | ||
5f21c96d | 1036 | parent_inode = ceph_get_dentry_parent_inode(dentry); |
355da1eb | 1037 | err = ceph_mdsc_do_request(mdsc, parent_inode, req); |
5f21c96d | 1038 | iput(parent_inode); |
355da1eb SW |
1039 | ceph_mdsc_put_request(req); |
1040 | return err; | |
1041 | } | |
1042 | ||
7221fe4c | 1043 | int __ceph_removexattr(struct dentry *dentry, const char *name) |
355da1eb SW |
1044 | { |
1045 | struct inode *inode = dentry->d_inode; | |
881a5fa2 | 1046 | struct ceph_vxattr *vxattr; |
355da1eb | 1047 | struct ceph_inode_info *ci = ceph_inode(inode); |
355da1eb SW |
1048 | int issued; |
1049 | int err; | |
83eb26af | 1050 | int required_blob_size; |
fca65b4a | 1051 | int dirty; |
355da1eb | 1052 | |
355da1eb SW |
1053 | if (!ceph_is_valid_xattr(name)) |
1054 | return -EOPNOTSUPP; | |
1055 | ||
06476a69 AE |
1056 | vxattr = ceph_match_vxattr(inode, name); |
1057 | if (vxattr && vxattr->readonly) | |
1058 | return -EOPNOTSUPP; | |
355da1eb | 1059 | |
d421acb1 SW |
1060 | /* pass any unhandled ceph.* xattrs through to the MDS */ |
1061 | if (!strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN)) | |
1062 | goto do_sync_unlocked; | |
1063 | ||
83eb26af | 1064 | err = -ENOMEM; |
be655596 | 1065 | spin_lock(&ci->i_ceph_lock); |
83eb26af | 1066 | retry: |
355da1eb SW |
1067 | issued = __ceph_caps_issued(ci, NULL); |
1068 | dout("removexattr %p issued %s\n", inode, ceph_cap_string(issued)); | |
1069 | ||
1070 | if (!(issued & CEPH_CAP_XATTR_EXCL)) | |
1071 | goto do_sync; | |
18fa8b3f | 1072 | __build_xattrs(inode); |
355da1eb | 1073 | |
83eb26af AE |
1074 | required_blob_size = __get_required_blob_size(ci, 0, 0); |
1075 | ||
1076 | if (!ci->i_xattrs.prealloc_blob || | |
1077 | required_blob_size > ci->i_xattrs.prealloc_blob->alloc_len) { | |
1078 | struct ceph_buffer *blob; | |
1079 | ||
1080 | spin_unlock(&ci->i_ceph_lock); | |
1081 | dout(" preaallocating new blob size=%d\n", required_blob_size); | |
1082 | blob = ceph_buffer_new(required_blob_size, GFP_NOFS); | |
1083 | if (!blob) | |
1084 | goto out; | |
1085 | spin_lock(&ci->i_ceph_lock); | |
1086 | if (ci->i_xattrs.prealloc_blob) | |
1087 | ceph_buffer_put(ci->i_xattrs.prealloc_blob); | |
1088 | ci->i_xattrs.prealloc_blob = blob; | |
1089 | goto retry; | |
1090 | } | |
1091 | ||
355da1eb | 1092 | err = __remove_xattr_by_name(ceph_inode(inode), name); |
18fa8b3f | 1093 | |
fca65b4a | 1094 | dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_XATTR_EXCL); |
355da1eb SW |
1095 | ci->i_xattrs.dirty = true; |
1096 | inode->i_ctime = CURRENT_TIME; | |
be655596 | 1097 | spin_unlock(&ci->i_ceph_lock); |
fca65b4a SW |
1098 | if (dirty) |
1099 | __mark_inode_dirty(inode, dirty); | |
355da1eb SW |
1100 | return err; |
1101 | do_sync: | |
be655596 | 1102 | spin_unlock(&ci->i_ceph_lock); |
d421acb1 | 1103 | do_sync_unlocked: |
355da1eb | 1104 | err = ceph_send_removexattr(dentry, name); |
83eb26af | 1105 | out: |
355da1eb SW |
1106 | return err; |
1107 | } | |
1108 | ||
7221fe4c GZ |
1109 | int ceph_removexattr(struct dentry *dentry, const char *name) |
1110 | { | |
1111 | if (ceph_snap(dentry->d_inode) != CEPH_NOSNAP) | |
1112 | return -EROFS; | |
1113 | ||
1114 | if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN)) | |
1115 | return generic_removexattr(dentry, name); | |
1116 | ||
1117 | return __ceph_removexattr(dentry, name); | |
1118 | } |