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, | |
1e5c6649 | 67 | size_t size) |
32ab0bd7 SW |
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; | |
1e5c6649 | 74 | char buf[128]; |
32ab0bd7 SW |
75 | |
76 | dout("ceph_vxattrcb_layout %p\n", &ci->vfs_inode); | |
77 | down_read(&osdc->map_sem); | |
78 | pool_name = ceph_pg_pool_name_by_id(osdc->osdmap, pool); | |
1e5c6649 YZ |
79 | if (pool_name) { |
80 | size_t len = strlen(pool_name); | |
81 | ret = snprintf(buf, sizeof(buf), | |
82 | "stripe_unit=%lld stripe_count=%lld object_size=%lld pool=", | |
32ab0bd7 SW |
83 | (unsigned long long)ceph_file_layout_su(ci->i_layout), |
84 | (unsigned long long)ceph_file_layout_stripe_count(ci->i_layout), | |
1e5c6649 YZ |
85 | (unsigned long long)ceph_file_layout_object_size(ci->i_layout)); |
86 | if (!size) { | |
87 | ret += len; | |
88 | } else if (ret + len > size) { | |
89 | ret = -ERANGE; | |
90 | } else { | |
91 | memcpy(val, buf, ret); | |
92 | memcpy(val + ret, pool_name, len); | |
93 | ret += len; | |
94 | } | |
95 | } else { | |
96 | ret = snprintf(buf, sizeof(buf), | |
32ab0bd7 SW |
97 | "stripe_unit=%lld stripe_count=%lld object_size=%lld pool=%lld", |
98 | (unsigned long long)ceph_file_layout_su(ci->i_layout), | |
99 | (unsigned long long)ceph_file_layout_stripe_count(ci->i_layout), | |
100 | (unsigned long long)ceph_file_layout_object_size(ci->i_layout), | |
101 | (unsigned long long)pool); | |
1e5c6649 YZ |
102 | if (size) { |
103 | if (ret <= size) | |
104 | memcpy(val, buf, ret); | |
105 | else | |
106 | ret = -ERANGE; | |
107 | } | |
108 | } | |
32ab0bd7 SW |
109 | up_read(&osdc->map_sem); |
110 | return ret; | |
111 | } | |
112 | ||
695b7119 SW |
113 | static size_t ceph_vxattrcb_layout_stripe_unit(struct ceph_inode_info *ci, |
114 | char *val, size_t size) | |
115 | { | |
116 | return snprintf(val, size, "%lld", | |
117 | (unsigned long long)ceph_file_layout_su(ci->i_layout)); | |
118 | } | |
119 | ||
120 | static size_t ceph_vxattrcb_layout_stripe_count(struct ceph_inode_info *ci, | |
121 | char *val, size_t size) | |
122 | { | |
123 | return snprintf(val, size, "%lld", | |
124 | (unsigned long long)ceph_file_layout_stripe_count(ci->i_layout)); | |
125 | } | |
126 | ||
127 | static size_t ceph_vxattrcb_layout_object_size(struct ceph_inode_info *ci, | |
128 | char *val, size_t size) | |
129 | { | |
130 | return snprintf(val, size, "%lld", | |
131 | (unsigned long long)ceph_file_layout_object_size(ci->i_layout)); | |
132 | } | |
133 | ||
134 | static size_t ceph_vxattrcb_layout_pool(struct ceph_inode_info *ci, | |
135 | char *val, size_t size) | |
136 | { | |
137 | int ret; | |
138 | struct ceph_fs_client *fsc = ceph_sb_to_client(ci->vfs_inode.i_sb); | |
139 | struct ceph_osd_client *osdc = &fsc->client->osdc; | |
140 | s64 pool = ceph_file_layout_pg_pool(ci->i_layout); | |
141 | const char *pool_name; | |
142 | ||
143 | down_read(&osdc->map_sem); | |
144 | pool_name = ceph_pg_pool_name_by_id(osdc->osdmap, pool); | |
145 | if (pool_name) | |
146 | ret = snprintf(val, size, "%s", pool_name); | |
147 | else | |
148 | ret = snprintf(val, size, "%lld", (unsigned long long)pool); | |
149 | up_read(&osdc->map_sem); | |
150 | return ret; | |
151 | } | |
152 | ||
355da1eb SW |
153 | /* directories */ |
154 | ||
aa4066ed | 155 | static size_t ceph_vxattrcb_dir_entries(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
156 | size_t size) |
157 | { | |
158 | return snprintf(val, size, "%lld", ci->i_files + ci->i_subdirs); | |
159 | } | |
160 | ||
aa4066ed | 161 | static size_t ceph_vxattrcb_dir_files(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
162 | size_t size) |
163 | { | |
164 | return snprintf(val, size, "%lld", ci->i_files); | |
165 | } | |
166 | ||
aa4066ed | 167 | static size_t ceph_vxattrcb_dir_subdirs(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
168 | size_t size) |
169 | { | |
170 | return snprintf(val, size, "%lld", ci->i_subdirs); | |
171 | } | |
172 | ||
aa4066ed | 173 | static size_t ceph_vxattrcb_dir_rentries(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
174 | size_t size) |
175 | { | |
176 | return snprintf(val, size, "%lld", ci->i_rfiles + ci->i_rsubdirs); | |
177 | } | |
178 | ||
aa4066ed | 179 | static size_t ceph_vxattrcb_dir_rfiles(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
180 | size_t size) |
181 | { | |
182 | return snprintf(val, size, "%lld", ci->i_rfiles); | |
183 | } | |
184 | ||
aa4066ed | 185 | static size_t ceph_vxattrcb_dir_rsubdirs(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
186 | size_t size) |
187 | { | |
188 | return snprintf(val, size, "%lld", ci->i_rsubdirs); | |
189 | } | |
190 | ||
aa4066ed | 191 | static size_t ceph_vxattrcb_dir_rbytes(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
192 | size_t size) |
193 | { | |
194 | return snprintf(val, size, "%lld", ci->i_rbytes); | |
195 | } | |
196 | ||
aa4066ed | 197 | static size_t ceph_vxattrcb_dir_rctime(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
198 | size_t size) |
199 | { | |
3489b42a | 200 | return snprintf(val, size, "%ld.09%ld", (long)ci->i_rctime.tv_sec, |
355da1eb SW |
201 | (long)ci->i_rctime.tv_nsec); |
202 | } | |
203 | ||
32ab0bd7 | 204 | |
eb788084 | 205 | #define CEPH_XATTR_NAME(_type, _name) XATTR_CEPH_PREFIX #_type "." #_name |
695b7119 SW |
206 | #define CEPH_XATTR_NAME2(_type, _name, _name2) \ |
207 | XATTR_CEPH_PREFIX #_type "." #_name "." #_name2 | |
eb788084 | 208 | |
8860147a SW |
209 | #define XATTR_NAME_CEPH(_type, _name) \ |
210 | { \ | |
211 | .name = CEPH_XATTR_NAME(_type, _name), \ | |
212 | .name_size = sizeof (CEPH_XATTR_NAME(_type, _name)), \ | |
213 | .getxattr_cb = ceph_vxattrcb_ ## _type ## _ ## _name, \ | |
214 | .readonly = true, \ | |
215 | .hidden = false, \ | |
f36e4472 | 216 | .exists_cb = NULL, \ |
8860147a | 217 | } |
695b7119 SW |
218 | #define XATTR_LAYOUT_FIELD(_type, _name, _field) \ |
219 | { \ | |
220 | .name = CEPH_XATTR_NAME2(_type, _name, _field), \ | |
221 | .name_size = sizeof (CEPH_XATTR_NAME2(_type, _name, _field)), \ | |
222 | .getxattr_cb = ceph_vxattrcb_ ## _name ## _ ## _field, \ | |
223 | .readonly = false, \ | |
224 | .hidden = true, \ | |
225 | .exists_cb = ceph_vxattrcb_layout_exists, \ | |
226 | } | |
eb788084 | 227 | |
881a5fa2 | 228 | static struct ceph_vxattr ceph_dir_vxattrs[] = { |
1f08f2b0 SW |
229 | { |
230 | .name = "ceph.dir.layout", | |
231 | .name_size = sizeof("ceph.dir.layout"), | |
232 | .getxattr_cb = ceph_vxattrcb_layout, | |
233 | .readonly = false, | |
cc48c3e8 | 234 | .hidden = true, |
1f08f2b0 SW |
235 | .exists_cb = ceph_vxattrcb_layout_exists, |
236 | }, | |
695b7119 SW |
237 | XATTR_LAYOUT_FIELD(dir, layout, stripe_unit), |
238 | XATTR_LAYOUT_FIELD(dir, layout, stripe_count), | |
239 | XATTR_LAYOUT_FIELD(dir, layout, object_size), | |
240 | XATTR_LAYOUT_FIELD(dir, layout, pool), | |
eb788084 AE |
241 | XATTR_NAME_CEPH(dir, entries), |
242 | XATTR_NAME_CEPH(dir, files), | |
243 | XATTR_NAME_CEPH(dir, subdirs), | |
244 | XATTR_NAME_CEPH(dir, rentries), | |
245 | XATTR_NAME_CEPH(dir, rfiles), | |
246 | XATTR_NAME_CEPH(dir, rsubdirs), | |
247 | XATTR_NAME_CEPH(dir, rbytes), | |
248 | XATTR_NAME_CEPH(dir, rctime), | |
2c3dd4ff | 249 | { .name = NULL, 0 } /* Required table terminator */ |
355da1eb | 250 | }; |
3ce6cd12 | 251 | static size_t ceph_dir_vxattrs_name_size; /* total size of all names */ |
355da1eb SW |
252 | |
253 | /* files */ | |
254 | ||
881a5fa2 | 255 | static struct ceph_vxattr ceph_file_vxattrs[] = { |
32ab0bd7 SW |
256 | { |
257 | .name = "ceph.file.layout", | |
258 | .name_size = sizeof("ceph.file.layout"), | |
259 | .getxattr_cb = ceph_vxattrcb_layout, | |
260 | .readonly = false, | |
cc48c3e8 | 261 | .hidden = true, |
32ab0bd7 SW |
262 | .exists_cb = ceph_vxattrcb_layout_exists, |
263 | }, | |
695b7119 SW |
264 | XATTR_LAYOUT_FIELD(file, layout, stripe_unit), |
265 | XATTR_LAYOUT_FIELD(file, layout, stripe_count), | |
266 | XATTR_LAYOUT_FIELD(file, layout, object_size), | |
267 | XATTR_LAYOUT_FIELD(file, layout, pool), | |
2c3dd4ff | 268 | { .name = NULL, 0 } /* Required table terminator */ |
355da1eb | 269 | }; |
3ce6cd12 | 270 | static size_t ceph_file_vxattrs_name_size; /* total size of all names */ |
355da1eb | 271 | |
881a5fa2 | 272 | static struct ceph_vxattr *ceph_inode_vxattrs(struct inode *inode) |
355da1eb SW |
273 | { |
274 | if (S_ISDIR(inode->i_mode)) | |
275 | return ceph_dir_vxattrs; | |
276 | else if (S_ISREG(inode->i_mode)) | |
277 | return ceph_file_vxattrs; | |
278 | return NULL; | |
279 | } | |
280 | ||
3ce6cd12 AE |
281 | static size_t ceph_vxattrs_name_size(struct ceph_vxattr *vxattrs) |
282 | { | |
283 | if (vxattrs == ceph_dir_vxattrs) | |
284 | return ceph_dir_vxattrs_name_size; | |
285 | if (vxattrs == ceph_file_vxattrs) | |
286 | return ceph_file_vxattrs_name_size; | |
287 | BUG(); | |
288 | ||
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++) | |
8860147a SW |
302 | if (!vxattr->hidden) |
303 | size += vxattr->name_size; | |
3ce6cd12 AE |
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 | ||
881a5fa2 | 322 | static struct ceph_vxattr *ceph_match_vxattr(struct inode *inode, |
355da1eb SW |
323 | const char *name) |
324 | { | |
881a5fa2 | 325 | struct ceph_vxattr *vxattr = ceph_inode_vxattrs(inode); |
06476a69 AE |
326 | |
327 | if (vxattr) { | |
328 | while (vxattr->name) { | |
329 | if (!strcmp(vxattr->name, name)) | |
330 | return vxattr; | |
331 | vxattr++; | |
332 | } | |
333 | } | |
334 | ||
355da1eb SW |
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, | |
fbc0b970 | 341 | int flags, int update_xattr, |
355da1eb SW |
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 | ||
fbc0b970 YZ |
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 | } | |
bcdfeb2e YZ |
381 | if (update_xattr < 0) { |
382 | if (xattr) | |
383 | __remove_xattr(ci, xattr); | |
384 | kfree(name); | |
385 | return 0; | |
386 | } | |
fbc0b970 YZ |
387 | } |
388 | ||
355da1eb SW |
389 | if (!xattr) { |
390 | new = 1; | |
391 | xattr = *newxattr; | |
392 | xattr->name = name; | |
393 | xattr->name_len = name_len; | |
fbc0b970 | 394 | xattr->should_free_name = update_xattr; |
355da1eb SW |
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 | ||
fbc0b970 | 404 | if (update_xattr) { |
355da1eb SW |
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 | } | |
355da1eb SW |
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; | |
fbc0b970 YZ |
419 | xattr->dirty = update_xattr; |
420 | xattr->should_free_val = (val && update_xattr); | |
355da1eb SW |
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; | |
17db143f | 440 | int name_len = strlen(name); |
355da1eb SW |
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); | |
17db143f SW |
448 | if (c == 0 && name_len > xattr->name_len) |
449 | c = 1; | |
355da1eb SW |
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) | |
524186ac | 482 | return -ENODATA; |
355da1eb SW |
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) | |
be655596 SW |
564 | __releases(ci->i_ceph_lock) |
565 | __acquires(ci->i_ceph_lock) | |
355da1eb SW |
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; | |
63ff78b2 | 575 | int err = 0; |
355da1eb SW |
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; | |
be655596 | 593 | spin_unlock(&ci->i_ceph_lock); |
355da1eb SW |
594 | |
595 | xattrs = kcalloc(numattr, sizeof(struct ceph_xattr *), | |
596 | GFP_NOFS); | |
597 | err = -ENOMEM; | |
598 | if (!xattrs) | |
599 | goto bad_lock; | |
600 | memset(xattrs, 0, numattr*sizeof(struct ceph_xattr *)); | |
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 | ||
be655596 | 608 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
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); | |
21ec6ffa | 614 | xattrs = NULL; |
355da1eb SW |
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, | |
fbc0b970 | 628 | 0, 0, &xattrs[numattr]); |
355da1eb SW |
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: | |
be655596 | 640 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
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 | ||
b6c1d5b8 SW |
708 | if (ci->i_xattrs.blob) |
709 | ceph_buffer_put(ci->i_xattrs.blob); | |
355da1eb SW |
710 | ci->i_xattrs.blob = ci->i_xattrs.prealloc_blob; |
711 | ci->i_xattrs.prealloc_blob = NULL; | |
712 | ci->i_xattrs.dirty = false; | |
4a625be4 | 713 | ci->i_xattrs.version++; |
355da1eb SW |
714 | } |
715 | } | |
716 | ||
7221fe4c | 717 | ssize_t __ceph_getxattr(struct inode *inode, const char *name, void *value, |
355da1eb SW |
718 | size_t size) |
719 | { | |
355da1eb | 720 | struct ceph_inode_info *ci = ceph_inode(inode); |
355da1eb SW |
721 | int err; |
722 | struct ceph_inode_xattr *xattr; | |
881a5fa2 | 723 | struct ceph_vxattr *vxattr = NULL; |
355da1eb SW |
724 | |
725 | if (!ceph_is_valid_xattr(name)) | |
726 | return -ENODATA; | |
727 | ||
0bee82fb SW |
728 | /* let's see if a virtual xattr was requested */ |
729 | vxattr = ceph_match_vxattr(inode, name); | |
730 | if (vxattr && !(vxattr->exists_cb && !vxattr->exists_cb(ci))) { | |
731 | err = vxattr->getxattr_cb(ci, value, size); | |
a1dc1937 | 732 | return err; |
0bee82fb SW |
733 | } |
734 | ||
a1dc1937 | 735 | spin_lock(&ci->i_ceph_lock); |
736 | dout("getxattr %p ver=%lld index_ver=%lld\n", inode, | |
737 | ci->i_xattrs.version, ci->i_xattrs.index_version); | |
738 | ||
355da1eb SW |
739 | if (__ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 1) && |
740 | (ci->i_xattrs.index_version >= ci->i_xattrs.version)) { | |
741 | goto get_xattr; | |
742 | } else { | |
be655596 | 743 | spin_unlock(&ci->i_ceph_lock); |
355da1eb SW |
744 | /* get xattrs from mds (if we don't already have them) */ |
745 | err = ceph_do_getattr(inode, CEPH_STAT_CAP_XATTR); | |
746 | if (err) | |
747 | return err; | |
748 | } | |
749 | ||
be655596 | 750 | spin_lock(&ci->i_ceph_lock); |
355da1eb | 751 | |
355da1eb SW |
752 | err = __build_xattrs(inode); |
753 | if (err < 0) | |
754 | goto out; | |
755 | ||
756 | get_xattr: | |
757 | err = -ENODATA; /* == ENOATTR */ | |
758 | xattr = __get_xattr(ci, name); | |
0bee82fb | 759 | if (!xattr) |
355da1eb | 760 | goto out; |
355da1eb SW |
761 | |
762 | err = -ERANGE; | |
763 | if (size && size < xattr->val_len) | |
764 | goto out; | |
765 | ||
766 | err = xattr->val_len; | |
767 | if (size == 0) | |
768 | goto out; | |
769 | ||
770 | memcpy(value, xattr->val, xattr->val_len); | |
771 | ||
772 | out: | |
be655596 | 773 | spin_unlock(&ci->i_ceph_lock); |
355da1eb SW |
774 | return err; |
775 | } | |
776 | ||
7221fe4c GZ |
777 | ssize_t ceph_getxattr(struct dentry *dentry, const char *name, void *value, |
778 | size_t size) | |
779 | { | |
780 | if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN)) | |
781 | return generic_getxattr(dentry, name, value, size); | |
782 | ||
783 | return __ceph_getxattr(dentry->d_inode, name, value, size); | |
784 | } | |
785 | ||
355da1eb SW |
786 | ssize_t ceph_listxattr(struct dentry *dentry, char *names, size_t size) |
787 | { | |
788 | struct inode *inode = dentry->d_inode; | |
789 | struct ceph_inode_info *ci = ceph_inode(inode); | |
881a5fa2 | 790 | struct ceph_vxattr *vxattrs = ceph_inode_vxattrs(inode); |
355da1eb SW |
791 | u32 vir_namelen = 0; |
792 | u32 namelen; | |
793 | int err; | |
794 | u32 len; | |
795 | int i; | |
796 | ||
be655596 | 797 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
798 | dout("listxattr %p ver=%lld index_ver=%lld\n", inode, |
799 | ci->i_xattrs.version, ci->i_xattrs.index_version); | |
800 | ||
801 | if (__ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 1) && | |
bddfa3cc | 802 | (ci->i_xattrs.index_version >= ci->i_xattrs.version)) { |
355da1eb SW |
803 | goto list_xattr; |
804 | } else { | |
be655596 | 805 | spin_unlock(&ci->i_ceph_lock); |
355da1eb SW |
806 | err = ceph_do_getattr(inode, CEPH_STAT_CAP_XATTR); |
807 | if (err) | |
808 | return err; | |
809 | } | |
810 | ||
be655596 | 811 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
812 | |
813 | err = __build_xattrs(inode); | |
814 | if (err < 0) | |
815 | goto out; | |
816 | ||
817 | list_xattr: | |
3ce6cd12 AE |
818 | /* |
819 | * Start with virtual dir xattr names (if any) (including | |
820 | * terminating '\0' characters for each). | |
821 | */ | |
822 | vir_namelen = ceph_vxattrs_name_size(vxattrs); | |
823 | ||
355da1eb | 824 | /* adding 1 byte per each variable due to the null termination */ |
b65917dd | 825 | namelen = ci->i_xattrs.names_size + ci->i_xattrs.count; |
355da1eb | 826 | err = -ERANGE; |
b65917dd | 827 | if (size && vir_namelen + namelen > size) |
355da1eb SW |
828 | goto out; |
829 | ||
b65917dd | 830 | err = namelen + vir_namelen; |
355da1eb SW |
831 | if (size == 0) |
832 | goto out; | |
833 | ||
834 | names = __copy_xattr_names(ci, names); | |
835 | ||
836 | /* virtual xattr names, too */ | |
b65917dd SW |
837 | err = namelen; |
838 | if (vxattrs) { | |
355da1eb | 839 | for (i = 0; vxattrs[i].name; i++) { |
b65917dd SW |
840 | if (!vxattrs[i].hidden && |
841 | !(vxattrs[i].exists_cb && | |
842 | !vxattrs[i].exists_cb(ci))) { | |
843 | len = sprintf(names, "%s", vxattrs[i].name); | |
844 | names += len + 1; | |
845 | err += len + 1; | |
846 | } | |
355da1eb | 847 | } |
b65917dd | 848 | } |
355da1eb SW |
849 | |
850 | out: | |
be655596 | 851 | spin_unlock(&ci->i_ceph_lock); |
355da1eb SW |
852 | return err; |
853 | } | |
854 | ||
855 | static int ceph_sync_setxattr(struct dentry *dentry, const char *name, | |
856 | const char *value, size_t size, int flags) | |
857 | { | |
3d14c5d2 | 858 | struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb); |
355da1eb SW |
859 | struct inode *inode = dentry->d_inode; |
860 | struct ceph_inode_info *ci = ceph_inode(inode); | |
355da1eb | 861 | struct ceph_mds_request *req; |
3d14c5d2 | 862 | struct ceph_mds_client *mdsc = fsc->mdsc; |
355da1eb SW |
863 | int err; |
864 | int i, nr_pages; | |
865 | struct page **pages = NULL; | |
866 | void *kaddr; | |
867 | ||
868 | /* copy value into some pages */ | |
869 | nr_pages = calc_pages_for(0, size); | |
870 | if (nr_pages) { | |
871 | pages = kmalloc(sizeof(pages[0])*nr_pages, GFP_NOFS); | |
872 | if (!pages) | |
873 | return -ENOMEM; | |
874 | err = -ENOMEM; | |
875 | for (i = 0; i < nr_pages; i++) { | |
31459fe4 | 876 | pages[i] = __page_cache_alloc(GFP_NOFS); |
355da1eb SW |
877 | if (!pages[i]) { |
878 | nr_pages = i; | |
879 | goto out; | |
880 | } | |
881 | kaddr = kmap(pages[i]); | |
882 | memcpy(kaddr, value + i*PAGE_CACHE_SIZE, | |
883 | min(PAGE_CACHE_SIZE, size-i*PAGE_CACHE_SIZE)); | |
884 | } | |
885 | } | |
886 | ||
887 | dout("setxattr value=%.*s\n", (int)size, value); | |
888 | ||
bcdfeb2e YZ |
889 | if (!value) |
890 | flags |= CEPH_XATTR_REMOVE; | |
891 | ||
355da1eb SW |
892 | /* do request */ |
893 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETXATTR, | |
894 | USE_AUTH_MDS); | |
60d87733 JL |
895 | if (IS_ERR(req)) { |
896 | err = PTR_ERR(req); | |
897 | goto out; | |
898 | } | |
70b666c3 SW |
899 | req->r_inode = inode; |
900 | ihold(inode); | |
355da1eb SW |
901 | req->r_inode_drop = CEPH_CAP_XATTR_SHARED; |
902 | req->r_num_caps = 1; | |
903 | req->r_args.setxattr.flags = cpu_to_le32(flags); | |
904 | req->r_path2 = kstrdup(name, GFP_NOFS); | |
905 | ||
906 | req->r_pages = pages; | |
907 | req->r_num_pages = nr_pages; | |
908 | req->r_data_len = size; | |
909 | ||
910 | dout("xattr.ver (before): %lld\n", ci->i_xattrs.version); | |
752c8bdc | 911 | err = ceph_mdsc_do_request(mdsc, NULL, req); |
355da1eb SW |
912 | ceph_mdsc_put_request(req); |
913 | dout("xattr.ver (after): %lld\n", ci->i_xattrs.version); | |
914 | ||
915 | out: | |
916 | if (pages) { | |
917 | for (i = 0; i < nr_pages; i++) | |
918 | __free_page(pages[i]); | |
919 | kfree(pages); | |
920 | } | |
921 | return err; | |
922 | } | |
923 | ||
7221fe4c GZ |
924 | int __ceph_setxattr(struct dentry *dentry, const char *name, |
925 | const void *value, size_t size, int flags) | |
355da1eb SW |
926 | { |
927 | struct inode *inode = dentry->d_inode; | |
881a5fa2 | 928 | struct ceph_vxattr *vxattr; |
355da1eb | 929 | struct ceph_inode_info *ci = ceph_inode(inode); |
18fa8b3f | 930 | int issued; |
355da1eb | 931 | int err; |
fbc0b970 | 932 | int dirty = 0; |
355da1eb SW |
933 | int name_len = strlen(name); |
934 | int val_len = size; | |
935 | char *newname = NULL; | |
936 | char *newval = NULL; | |
937 | struct ceph_inode_xattr *xattr = NULL; | |
355da1eb SW |
938 | int required_blob_size; |
939 | ||
355da1eb SW |
940 | if (!ceph_is_valid_xattr(name)) |
941 | return -EOPNOTSUPP; | |
942 | ||
06476a69 AE |
943 | vxattr = ceph_match_vxattr(inode, name); |
944 | if (vxattr && vxattr->readonly) | |
945 | return -EOPNOTSUPP; | |
355da1eb | 946 | |
3adf654d SW |
947 | /* pass any unhandled ceph.* xattrs through to the MDS */ |
948 | if (!strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN)) | |
949 | goto do_sync_unlocked; | |
950 | ||
355da1eb SW |
951 | /* preallocate memory for xattr name, value, index node */ |
952 | err = -ENOMEM; | |
61413c2f | 953 | newname = kmemdup(name, name_len + 1, GFP_NOFS); |
355da1eb SW |
954 | if (!newname) |
955 | goto out; | |
355da1eb SW |
956 | |
957 | if (val_len) { | |
b829c195 | 958 | newval = kmemdup(value, val_len, GFP_NOFS); |
355da1eb SW |
959 | if (!newval) |
960 | goto out; | |
355da1eb SW |
961 | } |
962 | ||
963 | xattr = kmalloc(sizeof(struct ceph_inode_xattr), GFP_NOFS); | |
964 | if (!xattr) | |
965 | goto out; | |
966 | ||
be655596 | 967 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
968 | retry: |
969 | issued = __ceph_caps_issued(ci, NULL); | |
18fa8b3f | 970 | dout("setxattr %p issued %s\n", inode, ceph_cap_string(issued)); |
355da1eb SW |
971 | if (!(issued & CEPH_CAP_XATTR_EXCL)) |
972 | goto do_sync; | |
973 | __build_xattrs(inode); | |
974 | ||
975 | required_blob_size = __get_required_blob_size(ci, name_len, val_len); | |
976 | ||
977 | if (!ci->i_xattrs.prealloc_blob || | |
978 | required_blob_size > ci->i_xattrs.prealloc_blob->alloc_len) { | |
18fa8b3f | 979 | struct ceph_buffer *blob; |
355da1eb | 980 | |
be655596 | 981 | spin_unlock(&ci->i_ceph_lock); |
355da1eb | 982 | dout(" preaallocating new blob size=%d\n", required_blob_size); |
b6c1d5b8 | 983 | blob = ceph_buffer_new(required_blob_size, GFP_NOFS); |
355da1eb SW |
984 | if (!blob) |
985 | goto out; | |
be655596 | 986 | spin_lock(&ci->i_ceph_lock); |
b6c1d5b8 SW |
987 | if (ci->i_xattrs.prealloc_blob) |
988 | ceph_buffer_put(ci->i_xattrs.prealloc_blob); | |
355da1eb SW |
989 | ci->i_xattrs.prealloc_blob = blob; |
990 | goto retry; | |
991 | } | |
992 | ||
bcdfeb2e YZ |
993 | err = __set_xattr(ci, newname, name_len, newval, val_len, |
994 | flags, value ? 1 : -1, &xattr); | |
18fa8b3f | 995 | |
fbc0b970 YZ |
996 | if (!err) { |
997 | dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_XATTR_EXCL); | |
998 | ci->i_xattrs.dirty = true; | |
999 | inode->i_ctime = CURRENT_TIME; | |
1000 | } | |
18fa8b3f | 1001 | |
be655596 | 1002 | spin_unlock(&ci->i_ceph_lock); |
fca65b4a SW |
1003 | if (dirty) |
1004 | __mark_inode_dirty(inode, dirty); | |
355da1eb SW |
1005 | return err; |
1006 | ||
1007 | do_sync: | |
be655596 | 1008 | spin_unlock(&ci->i_ceph_lock); |
3adf654d | 1009 | do_sync_unlocked: |
355da1eb SW |
1010 | err = ceph_sync_setxattr(dentry, name, value, size, flags); |
1011 | out: | |
1012 | kfree(newname); | |
1013 | kfree(newval); | |
1014 | kfree(xattr); | |
1015 | return err; | |
1016 | } | |
1017 | ||
7221fe4c GZ |
1018 | int ceph_setxattr(struct dentry *dentry, const char *name, |
1019 | const void *value, size_t size, int flags) | |
1020 | { | |
1021 | if (ceph_snap(dentry->d_inode) != CEPH_NOSNAP) | |
1022 | return -EROFS; | |
1023 | ||
1024 | if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN)) | |
1025 | return generic_setxattr(dentry, name, value, size, flags); | |
1026 | ||
1027 | return __ceph_setxattr(dentry, name, value, size, flags); | |
1028 | } | |
1029 | ||
355da1eb SW |
1030 | static int ceph_send_removexattr(struct dentry *dentry, const char *name) |
1031 | { | |
3d14c5d2 YS |
1032 | struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb); |
1033 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
355da1eb | 1034 | struct inode *inode = dentry->d_inode; |
355da1eb SW |
1035 | struct ceph_mds_request *req; |
1036 | int err; | |
1037 | ||
1038 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_RMXATTR, | |
1039 | USE_AUTH_MDS); | |
1040 | if (IS_ERR(req)) | |
1041 | return PTR_ERR(req); | |
70b666c3 SW |
1042 | req->r_inode = inode; |
1043 | ihold(inode); | |
355da1eb SW |
1044 | req->r_inode_drop = CEPH_CAP_XATTR_SHARED; |
1045 | req->r_num_caps = 1; | |
1046 | req->r_path2 = kstrdup(name, GFP_NOFS); | |
1047 | ||
752c8bdc | 1048 | err = ceph_mdsc_do_request(mdsc, NULL, req); |
355da1eb SW |
1049 | ceph_mdsc_put_request(req); |
1050 | return err; | |
1051 | } | |
1052 | ||
7221fe4c | 1053 | int __ceph_removexattr(struct dentry *dentry, const char *name) |
355da1eb SW |
1054 | { |
1055 | struct inode *inode = dentry->d_inode; | |
881a5fa2 | 1056 | struct ceph_vxattr *vxattr; |
355da1eb | 1057 | struct ceph_inode_info *ci = ceph_inode(inode); |
355da1eb SW |
1058 | int issued; |
1059 | int err; | |
83eb26af | 1060 | int required_blob_size; |
fca65b4a | 1061 | int dirty; |
355da1eb | 1062 | |
355da1eb SW |
1063 | if (!ceph_is_valid_xattr(name)) |
1064 | return -EOPNOTSUPP; | |
1065 | ||
06476a69 AE |
1066 | vxattr = ceph_match_vxattr(inode, name); |
1067 | if (vxattr && vxattr->readonly) | |
1068 | return -EOPNOTSUPP; | |
355da1eb | 1069 | |
d421acb1 SW |
1070 | /* pass any unhandled ceph.* xattrs through to the MDS */ |
1071 | if (!strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN)) | |
1072 | goto do_sync_unlocked; | |
1073 | ||
83eb26af | 1074 | err = -ENOMEM; |
be655596 | 1075 | spin_lock(&ci->i_ceph_lock); |
83eb26af | 1076 | retry: |
355da1eb SW |
1077 | issued = __ceph_caps_issued(ci, NULL); |
1078 | dout("removexattr %p issued %s\n", inode, ceph_cap_string(issued)); | |
1079 | ||
1080 | if (!(issued & CEPH_CAP_XATTR_EXCL)) | |
1081 | goto do_sync; | |
18fa8b3f | 1082 | __build_xattrs(inode); |
355da1eb | 1083 | |
83eb26af AE |
1084 | required_blob_size = __get_required_blob_size(ci, 0, 0); |
1085 | ||
1086 | if (!ci->i_xattrs.prealloc_blob || | |
1087 | required_blob_size > ci->i_xattrs.prealloc_blob->alloc_len) { | |
1088 | struct ceph_buffer *blob; | |
1089 | ||
1090 | spin_unlock(&ci->i_ceph_lock); | |
1091 | dout(" preaallocating new blob size=%d\n", required_blob_size); | |
1092 | blob = ceph_buffer_new(required_blob_size, GFP_NOFS); | |
1093 | if (!blob) | |
1094 | goto out; | |
1095 | spin_lock(&ci->i_ceph_lock); | |
1096 | if (ci->i_xattrs.prealloc_blob) | |
1097 | ceph_buffer_put(ci->i_xattrs.prealloc_blob); | |
1098 | ci->i_xattrs.prealloc_blob = blob; | |
1099 | goto retry; | |
1100 | } | |
1101 | ||
355da1eb | 1102 | err = __remove_xattr_by_name(ceph_inode(inode), name); |
18fa8b3f | 1103 | |
fca65b4a | 1104 | dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_XATTR_EXCL); |
355da1eb SW |
1105 | ci->i_xattrs.dirty = true; |
1106 | inode->i_ctime = CURRENT_TIME; | |
be655596 | 1107 | spin_unlock(&ci->i_ceph_lock); |
fca65b4a SW |
1108 | if (dirty) |
1109 | __mark_inode_dirty(inode, dirty); | |
355da1eb SW |
1110 | return err; |
1111 | do_sync: | |
be655596 | 1112 | spin_unlock(&ci->i_ceph_lock); |
d421acb1 | 1113 | do_sync_unlocked: |
355da1eb | 1114 | err = ceph_send_removexattr(dentry, name); |
83eb26af | 1115 | out: |
355da1eb SW |
1116 | return err; |
1117 | } | |
1118 | ||
7221fe4c GZ |
1119 | int ceph_removexattr(struct dentry *dentry, const char *name) |
1120 | { | |
1121 | if (ceph_snap(dentry->d_inode) != CEPH_NOSNAP) | |
1122 | return -EROFS; | |
1123 | ||
1124 | if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN)) | |
1125 | return generic_removexattr(dentry, name); | |
1126 | ||
1127 | return __ceph_removexattr(dentry, name); | |
1128 | } |