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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> | |
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; | |
0abb43dc | 287 | BUG_ON(vxattrs); |
3ce6cd12 AE |
288 | return 0; |
289 | } | |
290 | ||
291 | /* | |
292 | * Compute the aggregate size (including terminating '\0') of all | |
293 | * virtual extended attribute names in the given vxattr table. | |
294 | */ | |
295 | static size_t __init vxattrs_name_size(struct ceph_vxattr *vxattrs) | |
296 | { | |
297 | struct ceph_vxattr *vxattr; | |
298 | size_t size = 0; | |
299 | ||
300 | for (vxattr = vxattrs; vxattr->name; vxattr++) | |
8860147a SW |
301 | if (!vxattr->hidden) |
302 | size += vxattr->name_size; | |
3ce6cd12 AE |
303 | |
304 | return size; | |
305 | } | |
306 | ||
307 | /* Routines called at initialization and exit time */ | |
308 | ||
309 | void __init ceph_xattr_init(void) | |
310 | { | |
311 | ceph_dir_vxattrs_name_size = vxattrs_name_size(ceph_dir_vxattrs); | |
312 | ceph_file_vxattrs_name_size = vxattrs_name_size(ceph_file_vxattrs); | |
313 | } | |
314 | ||
315 | void ceph_xattr_exit(void) | |
316 | { | |
317 | ceph_dir_vxattrs_name_size = 0; | |
318 | ceph_file_vxattrs_name_size = 0; | |
319 | } | |
320 | ||
881a5fa2 | 321 | static struct ceph_vxattr *ceph_match_vxattr(struct inode *inode, |
355da1eb SW |
322 | const char *name) |
323 | { | |
881a5fa2 | 324 | struct ceph_vxattr *vxattr = ceph_inode_vxattrs(inode); |
06476a69 AE |
325 | |
326 | if (vxattr) { | |
327 | while (vxattr->name) { | |
328 | if (!strcmp(vxattr->name, name)) | |
329 | return vxattr; | |
330 | vxattr++; | |
331 | } | |
332 | } | |
333 | ||
355da1eb SW |
334 | return NULL; |
335 | } | |
336 | ||
337 | static int __set_xattr(struct ceph_inode_info *ci, | |
338 | const char *name, int name_len, | |
339 | const char *val, int val_len, | |
fbc0b970 | 340 | int flags, int update_xattr, |
355da1eb SW |
341 | struct ceph_inode_xattr **newxattr) |
342 | { | |
343 | struct rb_node **p; | |
344 | struct rb_node *parent = NULL; | |
345 | struct ceph_inode_xattr *xattr = NULL; | |
346 | int c; | |
347 | int new = 0; | |
348 | ||
349 | p = &ci->i_xattrs.index.rb_node; | |
350 | while (*p) { | |
351 | parent = *p; | |
352 | xattr = rb_entry(parent, struct ceph_inode_xattr, node); | |
353 | c = strncmp(name, xattr->name, min(name_len, xattr->name_len)); | |
354 | if (c < 0) | |
355 | p = &(*p)->rb_left; | |
356 | else if (c > 0) | |
357 | p = &(*p)->rb_right; | |
358 | else { | |
359 | if (name_len == xattr->name_len) | |
360 | break; | |
361 | else if (name_len < xattr->name_len) | |
362 | p = &(*p)->rb_left; | |
363 | else | |
364 | p = &(*p)->rb_right; | |
365 | } | |
366 | xattr = NULL; | |
367 | } | |
368 | ||
fbc0b970 YZ |
369 | if (update_xattr) { |
370 | int err = 0; | |
371 | if (xattr && (flags & XATTR_CREATE)) | |
372 | err = -EEXIST; | |
373 | else if (!xattr && (flags & XATTR_REPLACE)) | |
374 | err = -ENODATA; | |
375 | if (err) { | |
376 | kfree(name); | |
377 | kfree(val); | |
378 | return err; | |
379 | } | |
bcdfeb2e YZ |
380 | if (update_xattr < 0) { |
381 | if (xattr) | |
382 | __remove_xattr(ci, xattr); | |
383 | kfree(name); | |
384 | return 0; | |
385 | } | |
fbc0b970 YZ |
386 | } |
387 | ||
355da1eb SW |
388 | if (!xattr) { |
389 | new = 1; | |
390 | xattr = *newxattr; | |
391 | xattr->name = name; | |
392 | xattr->name_len = name_len; | |
fbc0b970 | 393 | xattr->should_free_name = update_xattr; |
355da1eb SW |
394 | |
395 | ci->i_xattrs.count++; | |
396 | dout("__set_xattr count=%d\n", ci->i_xattrs.count); | |
397 | } else { | |
398 | kfree(*newxattr); | |
399 | *newxattr = NULL; | |
400 | if (xattr->should_free_val) | |
401 | kfree((void *)xattr->val); | |
402 | ||
fbc0b970 | 403 | if (update_xattr) { |
355da1eb SW |
404 | kfree((void *)name); |
405 | name = xattr->name; | |
406 | } | |
407 | ci->i_xattrs.names_size -= xattr->name_len; | |
408 | ci->i_xattrs.vals_size -= xattr->val_len; | |
409 | } | |
355da1eb SW |
410 | ci->i_xattrs.names_size += name_len; |
411 | ci->i_xattrs.vals_size += val_len; | |
412 | if (val) | |
413 | xattr->val = val; | |
414 | else | |
415 | xattr->val = ""; | |
416 | ||
417 | xattr->val_len = val_len; | |
fbc0b970 YZ |
418 | xattr->dirty = update_xattr; |
419 | xattr->should_free_val = (val && update_xattr); | |
355da1eb SW |
420 | |
421 | if (new) { | |
422 | rb_link_node(&xattr->node, parent, p); | |
423 | rb_insert_color(&xattr->node, &ci->i_xattrs.index); | |
424 | dout("__set_xattr_val p=%p\n", p); | |
425 | } | |
426 | ||
427 | dout("__set_xattr_val added %llx.%llx xattr %p %s=%.*s\n", | |
428 | ceph_vinop(&ci->vfs_inode), xattr, name, val_len, val); | |
429 | ||
430 | return 0; | |
431 | } | |
432 | ||
433 | static struct ceph_inode_xattr *__get_xattr(struct ceph_inode_info *ci, | |
434 | const char *name) | |
435 | { | |
436 | struct rb_node **p; | |
437 | struct rb_node *parent = NULL; | |
438 | struct ceph_inode_xattr *xattr = NULL; | |
17db143f | 439 | int name_len = strlen(name); |
355da1eb SW |
440 | int c; |
441 | ||
442 | p = &ci->i_xattrs.index.rb_node; | |
443 | while (*p) { | |
444 | parent = *p; | |
445 | xattr = rb_entry(parent, struct ceph_inode_xattr, node); | |
446 | c = strncmp(name, xattr->name, xattr->name_len); | |
17db143f SW |
447 | if (c == 0 && name_len > xattr->name_len) |
448 | c = 1; | |
355da1eb SW |
449 | if (c < 0) |
450 | p = &(*p)->rb_left; | |
451 | else if (c > 0) | |
452 | p = &(*p)->rb_right; | |
453 | else { | |
454 | dout("__get_xattr %s: found %.*s\n", name, | |
455 | xattr->val_len, xattr->val); | |
456 | return xattr; | |
457 | } | |
458 | } | |
459 | ||
460 | dout("__get_xattr %s: not found\n", name); | |
461 | ||
462 | return NULL; | |
463 | } | |
464 | ||
465 | static void __free_xattr(struct ceph_inode_xattr *xattr) | |
466 | { | |
467 | BUG_ON(!xattr); | |
468 | ||
469 | if (xattr->should_free_name) | |
470 | kfree((void *)xattr->name); | |
471 | if (xattr->should_free_val) | |
472 | kfree((void *)xattr->val); | |
473 | ||
474 | kfree(xattr); | |
475 | } | |
476 | ||
477 | static int __remove_xattr(struct ceph_inode_info *ci, | |
478 | struct ceph_inode_xattr *xattr) | |
479 | { | |
480 | if (!xattr) | |
524186ac | 481 | return -ENODATA; |
355da1eb SW |
482 | |
483 | rb_erase(&xattr->node, &ci->i_xattrs.index); | |
484 | ||
485 | if (xattr->should_free_name) | |
486 | kfree((void *)xattr->name); | |
487 | if (xattr->should_free_val) | |
488 | kfree((void *)xattr->val); | |
489 | ||
490 | ci->i_xattrs.names_size -= xattr->name_len; | |
491 | ci->i_xattrs.vals_size -= xattr->val_len; | |
492 | ci->i_xattrs.count--; | |
493 | kfree(xattr); | |
494 | ||
495 | return 0; | |
496 | } | |
497 | ||
498 | static int __remove_xattr_by_name(struct ceph_inode_info *ci, | |
499 | const char *name) | |
500 | { | |
501 | struct rb_node **p; | |
502 | struct ceph_inode_xattr *xattr; | |
503 | int err; | |
504 | ||
505 | p = &ci->i_xattrs.index.rb_node; | |
506 | xattr = __get_xattr(ci, name); | |
507 | err = __remove_xattr(ci, xattr); | |
508 | return err; | |
509 | } | |
510 | ||
511 | static char *__copy_xattr_names(struct ceph_inode_info *ci, | |
512 | char *dest) | |
513 | { | |
514 | struct rb_node *p; | |
515 | struct ceph_inode_xattr *xattr = NULL; | |
516 | ||
517 | p = rb_first(&ci->i_xattrs.index); | |
518 | dout("__copy_xattr_names count=%d\n", ci->i_xattrs.count); | |
519 | ||
520 | while (p) { | |
521 | xattr = rb_entry(p, struct ceph_inode_xattr, node); | |
522 | memcpy(dest, xattr->name, xattr->name_len); | |
523 | dest[xattr->name_len] = '\0'; | |
524 | ||
525 | dout("dest=%s %p (%s) (%d/%d)\n", dest, xattr, xattr->name, | |
526 | xattr->name_len, ci->i_xattrs.names_size); | |
527 | ||
528 | dest += xattr->name_len + 1; | |
529 | p = rb_next(p); | |
530 | } | |
531 | ||
532 | return dest; | |
533 | } | |
534 | ||
535 | void __ceph_destroy_xattrs(struct ceph_inode_info *ci) | |
536 | { | |
537 | struct rb_node *p, *tmp; | |
538 | struct ceph_inode_xattr *xattr = NULL; | |
539 | ||
540 | p = rb_first(&ci->i_xattrs.index); | |
541 | ||
542 | dout("__ceph_destroy_xattrs p=%p\n", p); | |
543 | ||
544 | while (p) { | |
545 | xattr = rb_entry(p, struct ceph_inode_xattr, node); | |
546 | tmp = p; | |
547 | p = rb_next(tmp); | |
548 | dout("__ceph_destroy_xattrs next p=%p (%.*s)\n", p, | |
549 | xattr->name_len, xattr->name); | |
550 | rb_erase(tmp, &ci->i_xattrs.index); | |
551 | ||
552 | __free_xattr(xattr); | |
553 | } | |
554 | ||
555 | ci->i_xattrs.names_size = 0; | |
556 | ci->i_xattrs.vals_size = 0; | |
557 | ci->i_xattrs.index_version = 0; | |
558 | ci->i_xattrs.count = 0; | |
559 | ci->i_xattrs.index = RB_ROOT; | |
560 | } | |
561 | ||
562 | static int __build_xattrs(struct inode *inode) | |
be655596 SW |
563 | __releases(ci->i_ceph_lock) |
564 | __acquires(ci->i_ceph_lock) | |
355da1eb SW |
565 | { |
566 | u32 namelen; | |
567 | u32 numattr = 0; | |
568 | void *p, *end; | |
569 | u32 len; | |
570 | const char *name, *val; | |
571 | struct ceph_inode_info *ci = ceph_inode(inode); | |
572 | int xattr_version; | |
573 | struct ceph_inode_xattr **xattrs = NULL; | |
63ff78b2 | 574 | int err = 0; |
355da1eb SW |
575 | int i; |
576 | ||
577 | dout("__build_xattrs() len=%d\n", | |
578 | ci->i_xattrs.blob ? (int)ci->i_xattrs.blob->vec.iov_len : 0); | |
579 | ||
580 | if (ci->i_xattrs.index_version >= ci->i_xattrs.version) | |
581 | return 0; /* already built */ | |
582 | ||
583 | __ceph_destroy_xattrs(ci); | |
584 | ||
585 | start: | |
586 | /* updated internal xattr rb tree */ | |
587 | if (ci->i_xattrs.blob && ci->i_xattrs.blob->vec.iov_len > 4) { | |
588 | p = ci->i_xattrs.blob->vec.iov_base; | |
589 | end = p + ci->i_xattrs.blob->vec.iov_len; | |
590 | ceph_decode_32_safe(&p, end, numattr, bad); | |
591 | xattr_version = ci->i_xattrs.version; | |
be655596 | 592 | spin_unlock(&ci->i_ceph_lock); |
355da1eb | 593 | |
7e8a2952 | 594 | xattrs = kcalloc(numattr, sizeof(struct ceph_inode_xattr *), |
355da1eb SW |
595 | GFP_NOFS); |
596 | err = -ENOMEM; | |
597 | if (!xattrs) | |
598 | goto bad_lock; | |
1a295bd8 | 599 | |
355da1eb SW |
600 | for (i = 0; i < numattr; i++) { |
601 | xattrs[i] = kmalloc(sizeof(struct ceph_inode_xattr), | |
602 | GFP_NOFS); | |
603 | if (!xattrs[i]) | |
604 | goto bad_lock; | |
605 | } | |
606 | ||
be655596 | 607 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
608 | if (ci->i_xattrs.version != xattr_version) { |
609 | /* lost a race, retry */ | |
610 | for (i = 0; i < numattr; i++) | |
611 | kfree(xattrs[i]); | |
612 | kfree(xattrs); | |
21ec6ffa | 613 | xattrs = NULL; |
355da1eb SW |
614 | goto start; |
615 | } | |
616 | err = -EIO; | |
617 | while (numattr--) { | |
618 | ceph_decode_32_safe(&p, end, len, bad); | |
619 | namelen = len; | |
620 | name = p; | |
621 | p += len; | |
622 | ceph_decode_32_safe(&p, end, len, bad); | |
623 | val = p; | |
624 | p += len; | |
625 | ||
626 | err = __set_xattr(ci, name, namelen, val, len, | |
fbc0b970 | 627 | 0, 0, &xattrs[numattr]); |
355da1eb SW |
628 | |
629 | if (err < 0) | |
630 | goto bad; | |
631 | } | |
632 | kfree(xattrs); | |
633 | } | |
634 | ci->i_xattrs.index_version = ci->i_xattrs.version; | |
635 | ci->i_xattrs.dirty = false; | |
636 | ||
637 | return err; | |
638 | bad_lock: | |
be655596 | 639 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
640 | bad: |
641 | if (xattrs) { | |
642 | for (i = 0; i < numattr; i++) | |
643 | kfree(xattrs[i]); | |
644 | kfree(xattrs); | |
645 | } | |
646 | ci->i_xattrs.names_size = 0; | |
647 | return err; | |
648 | } | |
649 | ||
650 | static int __get_required_blob_size(struct ceph_inode_info *ci, int name_size, | |
651 | int val_size) | |
652 | { | |
653 | /* | |
654 | * 4 bytes for the length, and additional 4 bytes per each xattr name, | |
655 | * 4 bytes per each value | |
656 | */ | |
657 | int size = 4 + ci->i_xattrs.count*(4 + 4) + | |
658 | ci->i_xattrs.names_size + | |
659 | ci->i_xattrs.vals_size; | |
660 | dout("__get_required_blob_size c=%d names.size=%d vals.size=%d\n", | |
661 | ci->i_xattrs.count, ci->i_xattrs.names_size, | |
662 | ci->i_xattrs.vals_size); | |
663 | ||
664 | if (name_size) | |
665 | size += 4 + 4 + name_size + val_size; | |
666 | ||
667 | return size; | |
668 | } | |
669 | ||
670 | /* | |
671 | * If there are dirty xattrs, reencode xattrs into the prealloc_blob | |
672 | * and swap into place. | |
673 | */ | |
674 | void __ceph_build_xattrs_blob(struct ceph_inode_info *ci) | |
675 | { | |
676 | struct rb_node *p; | |
677 | struct ceph_inode_xattr *xattr = NULL; | |
678 | void *dest; | |
679 | ||
680 | dout("__build_xattrs_blob %p\n", &ci->vfs_inode); | |
681 | if (ci->i_xattrs.dirty) { | |
682 | int need = __get_required_blob_size(ci, 0, 0); | |
683 | ||
684 | BUG_ON(need > ci->i_xattrs.prealloc_blob->alloc_len); | |
685 | ||
686 | p = rb_first(&ci->i_xattrs.index); | |
687 | dest = ci->i_xattrs.prealloc_blob->vec.iov_base; | |
688 | ||
689 | ceph_encode_32(&dest, ci->i_xattrs.count); | |
690 | while (p) { | |
691 | xattr = rb_entry(p, struct ceph_inode_xattr, node); | |
692 | ||
693 | ceph_encode_32(&dest, xattr->name_len); | |
694 | memcpy(dest, xattr->name, xattr->name_len); | |
695 | dest += xattr->name_len; | |
696 | ceph_encode_32(&dest, xattr->val_len); | |
697 | memcpy(dest, xattr->val, xattr->val_len); | |
698 | dest += xattr->val_len; | |
699 | ||
700 | p = rb_next(p); | |
701 | } | |
702 | ||
703 | /* adjust buffer len; it may be larger than we need */ | |
704 | ci->i_xattrs.prealloc_blob->vec.iov_len = | |
705 | dest - ci->i_xattrs.prealloc_blob->vec.iov_base; | |
706 | ||
b6c1d5b8 SW |
707 | if (ci->i_xattrs.blob) |
708 | ceph_buffer_put(ci->i_xattrs.blob); | |
355da1eb SW |
709 | ci->i_xattrs.blob = ci->i_xattrs.prealloc_blob; |
710 | ci->i_xattrs.prealloc_blob = NULL; | |
711 | ci->i_xattrs.dirty = false; | |
4a625be4 | 712 | ci->i_xattrs.version++; |
355da1eb SW |
713 | } |
714 | } | |
715 | ||
7221fe4c | 716 | ssize_t __ceph_getxattr(struct inode *inode, const char *name, void *value, |
355da1eb SW |
717 | size_t size) |
718 | { | |
355da1eb | 719 | struct ceph_inode_info *ci = ceph_inode(inode); |
355da1eb SW |
720 | int err; |
721 | struct ceph_inode_xattr *xattr; | |
881a5fa2 | 722 | struct ceph_vxattr *vxattr = NULL; |
355da1eb SW |
723 | |
724 | if (!ceph_is_valid_xattr(name)) | |
725 | return -ENODATA; | |
726 | ||
0bee82fb SW |
727 | /* let's see if a virtual xattr was requested */ |
728 | vxattr = ceph_match_vxattr(inode, name); | |
729 | if (vxattr && !(vxattr->exists_cb && !vxattr->exists_cb(ci))) { | |
730 | err = vxattr->getxattr_cb(ci, value, size); | |
a1dc1937 | 731 | return err; |
0bee82fb SW |
732 | } |
733 | ||
a1dc1937 | 734 | spin_lock(&ci->i_ceph_lock); |
735 | dout("getxattr %p ver=%lld index_ver=%lld\n", inode, | |
736 | ci->i_xattrs.version, ci->i_xattrs.index_version); | |
737 | ||
508b32d8 YZ |
738 | if (ci->i_xattrs.version == 0 || |
739 | !__ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 1)) { | |
be655596 | 740 | spin_unlock(&ci->i_ceph_lock); |
355da1eb | 741 | /* get xattrs from mds (if we don't already have them) */ |
508b32d8 | 742 | err = ceph_do_getattr(inode, CEPH_STAT_CAP_XATTR, true); |
355da1eb SW |
743 | if (err) |
744 | return err; | |
508b32d8 | 745 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
746 | } |
747 | ||
355da1eb SW |
748 | err = __build_xattrs(inode); |
749 | if (err < 0) | |
750 | goto out; | |
751 | ||
355da1eb SW |
752 | err = -ENODATA; /* == ENOATTR */ |
753 | xattr = __get_xattr(ci, name); | |
0bee82fb | 754 | if (!xattr) |
355da1eb | 755 | goto out; |
355da1eb SW |
756 | |
757 | err = -ERANGE; | |
758 | if (size && size < xattr->val_len) | |
759 | goto out; | |
760 | ||
761 | err = xattr->val_len; | |
762 | if (size == 0) | |
763 | goto out; | |
764 | ||
765 | memcpy(value, xattr->val, xattr->val_len); | |
766 | ||
767 | out: | |
be655596 | 768 | spin_unlock(&ci->i_ceph_lock); |
355da1eb SW |
769 | return err; |
770 | } | |
771 | ||
7221fe4c GZ |
772 | ssize_t ceph_getxattr(struct dentry *dentry, const char *name, void *value, |
773 | size_t size) | |
774 | { | |
775 | if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN)) | |
776 | return generic_getxattr(dentry, name, value, size); | |
777 | ||
778 | return __ceph_getxattr(dentry->d_inode, name, value, size); | |
779 | } | |
780 | ||
355da1eb SW |
781 | ssize_t ceph_listxattr(struct dentry *dentry, char *names, size_t size) |
782 | { | |
783 | struct inode *inode = dentry->d_inode; | |
784 | struct ceph_inode_info *ci = ceph_inode(inode); | |
881a5fa2 | 785 | struct ceph_vxattr *vxattrs = ceph_inode_vxattrs(inode); |
355da1eb SW |
786 | u32 vir_namelen = 0; |
787 | u32 namelen; | |
788 | int err; | |
789 | u32 len; | |
790 | int i; | |
791 | ||
be655596 | 792 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
793 | dout("listxattr %p ver=%lld index_ver=%lld\n", inode, |
794 | ci->i_xattrs.version, ci->i_xattrs.index_version); | |
795 | ||
508b32d8 YZ |
796 | if (ci->i_xattrs.version == 0 || |
797 | !__ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 1)) { | |
be655596 | 798 | spin_unlock(&ci->i_ceph_lock); |
508b32d8 | 799 | err = ceph_do_getattr(inode, CEPH_STAT_CAP_XATTR, true); |
355da1eb SW |
800 | if (err) |
801 | return err; | |
508b32d8 | 802 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
803 | } |
804 | ||
355da1eb SW |
805 | err = __build_xattrs(inode); |
806 | if (err < 0) | |
807 | goto out; | |
3ce6cd12 AE |
808 | /* |
809 | * Start with virtual dir xattr names (if any) (including | |
810 | * terminating '\0' characters for each). | |
811 | */ | |
812 | vir_namelen = ceph_vxattrs_name_size(vxattrs); | |
813 | ||
355da1eb | 814 | /* adding 1 byte per each variable due to the null termination */ |
b65917dd | 815 | namelen = ci->i_xattrs.names_size + ci->i_xattrs.count; |
355da1eb | 816 | err = -ERANGE; |
b65917dd | 817 | if (size && vir_namelen + namelen > size) |
355da1eb SW |
818 | goto out; |
819 | ||
b65917dd | 820 | err = namelen + vir_namelen; |
355da1eb SW |
821 | if (size == 0) |
822 | goto out; | |
823 | ||
824 | names = __copy_xattr_names(ci, names); | |
825 | ||
826 | /* virtual xattr names, too */ | |
b65917dd SW |
827 | err = namelen; |
828 | if (vxattrs) { | |
355da1eb | 829 | for (i = 0; vxattrs[i].name; i++) { |
b65917dd SW |
830 | if (!vxattrs[i].hidden && |
831 | !(vxattrs[i].exists_cb && | |
832 | !vxattrs[i].exists_cb(ci))) { | |
833 | len = sprintf(names, "%s", vxattrs[i].name); | |
834 | names += len + 1; | |
835 | err += len + 1; | |
836 | } | |
355da1eb | 837 | } |
b65917dd | 838 | } |
355da1eb SW |
839 | |
840 | out: | |
be655596 | 841 | spin_unlock(&ci->i_ceph_lock); |
355da1eb SW |
842 | return err; |
843 | } | |
844 | ||
845 | static int ceph_sync_setxattr(struct dentry *dentry, const char *name, | |
846 | const char *value, size_t size, int flags) | |
847 | { | |
3d14c5d2 | 848 | struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb); |
355da1eb SW |
849 | struct inode *inode = dentry->d_inode; |
850 | struct ceph_inode_info *ci = ceph_inode(inode); | |
355da1eb | 851 | struct ceph_mds_request *req; |
3d14c5d2 | 852 | struct ceph_mds_client *mdsc = fsc->mdsc; |
355da1eb SW |
853 | int err; |
854 | int i, nr_pages; | |
855 | struct page **pages = NULL; | |
856 | void *kaddr; | |
857 | ||
858 | /* copy value into some pages */ | |
859 | nr_pages = calc_pages_for(0, size); | |
860 | if (nr_pages) { | |
861 | pages = kmalloc(sizeof(pages[0])*nr_pages, GFP_NOFS); | |
862 | if (!pages) | |
863 | return -ENOMEM; | |
864 | err = -ENOMEM; | |
865 | for (i = 0; i < nr_pages; i++) { | |
31459fe4 | 866 | pages[i] = __page_cache_alloc(GFP_NOFS); |
355da1eb SW |
867 | if (!pages[i]) { |
868 | nr_pages = i; | |
869 | goto out; | |
870 | } | |
871 | kaddr = kmap(pages[i]); | |
872 | memcpy(kaddr, value + i*PAGE_CACHE_SIZE, | |
873 | min(PAGE_CACHE_SIZE, size-i*PAGE_CACHE_SIZE)); | |
874 | } | |
875 | } | |
876 | ||
877 | dout("setxattr value=%.*s\n", (int)size, value); | |
878 | ||
bcdfeb2e YZ |
879 | if (!value) |
880 | flags |= CEPH_XATTR_REMOVE; | |
881 | ||
355da1eb SW |
882 | /* do request */ |
883 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETXATTR, | |
884 | USE_AUTH_MDS); | |
60d87733 JL |
885 | if (IS_ERR(req)) { |
886 | err = PTR_ERR(req); | |
887 | goto out; | |
888 | } | |
70b666c3 SW |
889 | req->r_inode = inode; |
890 | ihold(inode); | |
355da1eb SW |
891 | req->r_inode_drop = CEPH_CAP_XATTR_SHARED; |
892 | req->r_num_caps = 1; | |
893 | req->r_args.setxattr.flags = cpu_to_le32(flags); | |
894 | req->r_path2 = kstrdup(name, GFP_NOFS); | |
895 | ||
896 | req->r_pages = pages; | |
897 | req->r_num_pages = nr_pages; | |
898 | req->r_data_len = size; | |
899 | ||
900 | dout("xattr.ver (before): %lld\n", ci->i_xattrs.version); | |
752c8bdc | 901 | err = ceph_mdsc_do_request(mdsc, NULL, req); |
355da1eb SW |
902 | ceph_mdsc_put_request(req); |
903 | dout("xattr.ver (after): %lld\n", ci->i_xattrs.version); | |
904 | ||
905 | out: | |
906 | if (pages) { | |
907 | for (i = 0; i < nr_pages; i++) | |
908 | __free_page(pages[i]); | |
909 | kfree(pages); | |
910 | } | |
911 | return err; | |
912 | } | |
913 | ||
7221fe4c GZ |
914 | int __ceph_setxattr(struct dentry *dentry, const char *name, |
915 | const void *value, size_t size, int flags) | |
355da1eb SW |
916 | { |
917 | struct inode *inode = dentry->d_inode; | |
881a5fa2 | 918 | struct ceph_vxattr *vxattr; |
355da1eb | 919 | struct ceph_inode_info *ci = ceph_inode(inode); |
18fa8b3f | 920 | int issued; |
355da1eb | 921 | int err; |
fbc0b970 | 922 | int dirty = 0; |
355da1eb SW |
923 | int name_len = strlen(name); |
924 | int val_len = size; | |
925 | char *newname = NULL; | |
926 | char *newval = NULL; | |
927 | struct ceph_inode_xattr *xattr = NULL; | |
355da1eb SW |
928 | int required_blob_size; |
929 | ||
355da1eb SW |
930 | if (!ceph_is_valid_xattr(name)) |
931 | return -EOPNOTSUPP; | |
932 | ||
06476a69 AE |
933 | vxattr = ceph_match_vxattr(inode, name); |
934 | if (vxattr && vxattr->readonly) | |
935 | return -EOPNOTSUPP; | |
355da1eb | 936 | |
3adf654d SW |
937 | /* pass any unhandled ceph.* xattrs through to the MDS */ |
938 | if (!strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN)) | |
939 | goto do_sync_unlocked; | |
940 | ||
355da1eb SW |
941 | /* preallocate memory for xattr name, value, index node */ |
942 | err = -ENOMEM; | |
61413c2f | 943 | newname = kmemdup(name, name_len + 1, GFP_NOFS); |
355da1eb SW |
944 | if (!newname) |
945 | goto out; | |
355da1eb SW |
946 | |
947 | if (val_len) { | |
b829c195 | 948 | newval = kmemdup(value, val_len, GFP_NOFS); |
355da1eb SW |
949 | if (!newval) |
950 | goto out; | |
355da1eb SW |
951 | } |
952 | ||
953 | xattr = kmalloc(sizeof(struct ceph_inode_xattr), GFP_NOFS); | |
954 | if (!xattr) | |
955 | goto out; | |
956 | ||
be655596 | 957 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
958 | retry: |
959 | issued = __ceph_caps_issued(ci, NULL); | |
18fa8b3f | 960 | dout("setxattr %p issued %s\n", inode, ceph_cap_string(issued)); |
508b32d8 | 961 | if (ci->i_xattrs.version == 0 || !(issued & CEPH_CAP_XATTR_EXCL)) |
355da1eb SW |
962 | goto do_sync; |
963 | __build_xattrs(inode); | |
964 | ||
965 | required_blob_size = __get_required_blob_size(ci, name_len, val_len); | |
966 | ||
967 | if (!ci->i_xattrs.prealloc_blob || | |
968 | required_blob_size > ci->i_xattrs.prealloc_blob->alloc_len) { | |
18fa8b3f | 969 | struct ceph_buffer *blob; |
355da1eb | 970 | |
be655596 | 971 | spin_unlock(&ci->i_ceph_lock); |
355da1eb | 972 | dout(" preaallocating new blob size=%d\n", required_blob_size); |
b6c1d5b8 | 973 | blob = ceph_buffer_new(required_blob_size, GFP_NOFS); |
355da1eb SW |
974 | if (!blob) |
975 | goto out; | |
be655596 | 976 | spin_lock(&ci->i_ceph_lock); |
b6c1d5b8 SW |
977 | if (ci->i_xattrs.prealloc_blob) |
978 | ceph_buffer_put(ci->i_xattrs.prealloc_blob); | |
355da1eb SW |
979 | ci->i_xattrs.prealloc_blob = blob; |
980 | goto retry; | |
981 | } | |
982 | ||
bcdfeb2e YZ |
983 | err = __set_xattr(ci, newname, name_len, newval, val_len, |
984 | flags, value ? 1 : -1, &xattr); | |
18fa8b3f | 985 | |
fbc0b970 YZ |
986 | if (!err) { |
987 | dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_XATTR_EXCL); | |
988 | ci->i_xattrs.dirty = true; | |
989 | inode->i_ctime = CURRENT_TIME; | |
990 | } | |
18fa8b3f | 991 | |
be655596 | 992 | spin_unlock(&ci->i_ceph_lock); |
fca65b4a SW |
993 | if (dirty) |
994 | __mark_inode_dirty(inode, dirty); | |
355da1eb SW |
995 | return err; |
996 | ||
997 | do_sync: | |
be655596 | 998 | spin_unlock(&ci->i_ceph_lock); |
3adf654d | 999 | do_sync_unlocked: |
355da1eb SW |
1000 | err = ceph_sync_setxattr(dentry, name, value, size, flags); |
1001 | out: | |
1002 | kfree(newname); | |
1003 | kfree(newval); | |
1004 | kfree(xattr); | |
1005 | return err; | |
1006 | } | |
1007 | ||
7221fe4c GZ |
1008 | int ceph_setxattr(struct dentry *dentry, const char *name, |
1009 | const void *value, size_t size, int flags) | |
1010 | { | |
1011 | if (ceph_snap(dentry->d_inode) != CEPH_NOSNAP) | |
1012 | return -EROFS; | |
1013 | ||
1014 | if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN)) | |
1015 | return generic_setxattr(dentry, name, value, size, flags); | |
1016 | ||
1017 | return __ceph_setxattr(dentry, name, value, size, flags); | |
1018 | } | |
1019 | ||
355da1eb SW |
1020 | static int ceph_send_removexattr(struct dentry *dentry, const char *name) |
1021 | { | |
3d14c5d2 YS |
1022 | struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb); |
1023 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
355da1eb | 1024 | struct inode *inode = dentry->d_inode; |
355da1eb SW |
1025 | struct ceph_mds_request *req; |
1026 | int err; | |
1027 | ||
1028 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_RMXATTR, | |
1029 | USE_AUTH_MDS); | |
1030 | if (IS_ERR(req)) | |
1031 | return PTR_ERR(req); | |
70b666c3 SW |
1032 | req->r_inode = inode; |
1033 | ihold(inode); | |
355da1eb SW |
1034 | req->r_inode_drop = CEPH_CAP_XATTR_SHARED; |
1035 | req->r_num_caps = 1; | |
1036 | req->r_path2 = kstrdup(name, GFP_NOFS); | |
1037 | ||
752c8bdc | 1038 | err = ceph_mdsc_do_request(mdsc, NULL, req); |
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 | ||
508b32d8 | 1070 | if (ci->i_xattrs.version == 0 || !(issued & CEPH_CAP_XATTR_EXCL)) |
355da1eb | 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 | } |