Commit | Line | Data |
---|---|---|
3d14c5d2 | 1 | #include <linux/ceph/ceph_debug.h> |
25e6bae3 | 2 | #include <linux/ceph/pagelist.h> |
3d14c5d2 | 3 | |
355da1eb | 4 | #include "super.h" |
3d14c5d2 YS |
5 | #include "mds_client.h" |
6 | ||
7 | #include <linux/ceph/decode.h> | |
355da1eb SW |
8 | |
9 | #include <linux/xattr.h> | |
4db658ea | 10 | #include <linux/posix_acl_xattr.h> |
5a0e3ad6 | 11 | #include <linux/slab.h> |
355da1eb | 12 | |
22891907 AE |
13 | #define XATTR_CEPH_PREFIX "ceph." |
14 | #define XATTR_CEPH_PREFIX_LEN (sizeof (XATTR_CEPH_PREFIX) - 1) | |
15 | ||
bcdfeb2e YZ |
16 | static int __remove_xattr(struct ceph_inode_info *ci, |
17 | struct ceph_inode_xattr *xattr); | |
18 | ||
2cdeb1e4 AG |
19 | const struct xattr_handler ceph_other_xattr_handler; |
20 | ||
7221fe4c GZ |
21 | /* |
22 | * List of handlers for synthetic system.* attributes. Other | |
23 | * attributes are handled directly. | |
24 | */ | |
25 | const struct xattr_handler *ceph_xattr_handlers[] = { | |
26 | #ifdef CONFIG_CEPH_FS_POSIX_ACL | |
4db658ea LT |
27 | &posix_acl_access_xattr_handler, |
28 | &posix_acl_default_xattr_handler, | |
7221fe4c | 29 | #endif |
2cdeb1e4 | 30 | &ceph_other_xattr_handler, |
7221fe4c GZ |
31 | NULL, |
32 | }; | |
33 | ||
355da1eb SW |
34 | static bool ceph_is_valid_xattr(const char *name) |
35 | { | |
22891907 | 36 | return !strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN) || |
1a756278 | 37 | !strncmp(name, XATTR_SECURITY_PREFIX, |
355da1eb SW |
38 | XATTR_SECURITY_PREFIX_LEN) || |
39 | !strncmp(name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN) || | |
40 | !strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN); | |
41 | } | |
42 | ||
43 | /* | |
44 | * These define virtual xattrs exposing the recursive directory | |
45 | * statistics and layout metadata. | |
46 | */ | |
881a5fa2 | 47 | struct ceph_vxattr { |
355da1eb | 48 | char *name; |
3ce6cd12 | 49 | size_t name_size; /* strlen(name) + 1 (for '\0') */ |
355da1eb SW |
50 | size_t (*getxattr_cb)(struct ceph_inode_info *ci, char *val, |
51 | size_t size); | |
8860147a | 52 | bool readonly, hidden; |
f36e4472 | 53 | bool (*exists_cb)(struct ceph_inode_info *ci); |
355da1eb SW |
54 | }; |
55 | ||
32ab0bd7 SW |
56 | /* layouts */ |
57 | ||
58 | static bool ceph_vxattrcb_layout_exists(struct ceph_inode_info *ci) | |
59 | { | |
60 | size_t s; | |
61 | char *p = (char *)&ci->i_layout; | |
62 | ||
63 | for (s = 0; s < sizeof(ci->i_layout); s++, p++) | |
64 | if (*p) | |
65 | return true; | |
66 | return false; | |
67 | } | |
68 | ||
69 | static size_t ceph_vxattrcb_layout(struct ceph_inode_info *ci, char *val, | |
1e5c6649 | 70 | size_t size) |
32ab0bd7 SW |
71 | { |
72 | int ret; | |
73 | struct ceph_fs_client *fsc = ceph_sb_to_client(ci->vfs_inode.i_sb); | |
74 | struct ceph_osd_client *osdc = &fsc->client->osdc; | |
75 | s64 pool = ceph_file_layout_pg_pool(ci->i_layout); | |
76 | const char *pool_name; | |
1e5c6649 | 77 | char buf[128]; |
32ab0bd7 SW |
78 | |
79 | dout("ceph_vxattrcb_layout %p\n", &ci->vfs_inode); | |
5aea3dcd | 80 | down_read(&osdc->lock); |
32ab0bd7 | 81 | pool_name = ceph_pg_pool_name_by_id(osdc->osdmap, pool); |
1e5c6649 YZ |
82 | if (pool_name) { |
83 | size_t len = strlen(pool_name); | |
84 | ret = snprintf(buf, sizeof(buf), | |
85 | "stripe_unit=%lld stripe_count=%lld object_size=%lld pool=", | |
32ab0bd7 SW |
86 | (unsigned long long)ceph_file_layout_su(ci->i_layout), |
87 | (unsigned long long)ceph_file_layout_stripe_count(ci->i_layout), | |
1e5c6649 YZ |
88 | (unsigned long long)ceph_file_layout_object_size(ci->i_layout)); |
89 | if (!size) { | |
90 | ret += len; | |
91 | } else if (ret + len > size) { | |
92 | ret = -ERANGE; | |
93 | } else { | |
94 | memcpy(val, buf, ret); | |
95 | memcpy(val + ret, pool_name, len); | |
96 | ret += len; | |
97 | } | |
98 | } else { | |
99 | ret = snprintf(buf, sizeof(buf), | |
32ab0bd7 SW |
100 | "stripe_unit=%lld stripe_count=%lld object_size=%lld pool=%lld", |
101 | (unsigned long long)ceph_file_layout_su(ci->i_layout), | |
102 | (unsigned long long)ceph_file_layout_stripe_count(ci->i_layout), | |
103 | (unsigned long long)ceph_file_layout_object_size(ci->i_layout), | |
104 | (unsigned long long)pool); | |
1e5c6649 YZ |
105 | if (size) { |
106 | if (ret <= size) | |
107 | memcpy(val, buf, ret); | |
108 | else | |
109 | ret = -ERANGE; | |
110 | } | |
111 | } | |
5aea3dcd | 112 | up_read(&osdc->lock); |
32ab0bd7 SW |
113 | return ret; |
114 | } | |
115 | ||
695b7119 SW |
116 | static size_t ceph_vxattrcb_layout_stripe_unit(struct ceph_inode_info *ci, |
117 | char *val, size_t size) | |
118 | { | |
119 | return snprintf(val, size, "%lld", | |
120 | (unsigned long long)ceph_file_layout_su(ci->i_layout)); | |
121 | } | |
122 | ||
123 | static size_t ceph_vxattrcb_layout_stripe_count(struct ceph_inode_info *ci, | |
124 | char *val, size_t size) | |
125 | { | |
126 | return snprintf(val, size, "%lld", | |
127 | (unsigned long long)ceph_file_layout_stripe_count(ci->i_layout)); | |
128 | } | |
129 | ||
130 | static size_t ceph_vxattrcb_layout_object_size(struct ceph_inode_info *ci, | |
131 | char *val, size_t size) | |
132 | { | |
133 | return snprintf(val, size, "%lld", | |
134 | (unsigned long long)ceph_file_layout_object_size(ci->i_layout)); | |
135 | } | |
136 | ||
137 | static size_t ceph_vxattrcb_layout_pool(struct ceph_inode_info *ci, | |
138 | char *val, size_t size) | |
139 | { | |
140 | int ret; | |
141 | struct ceph_fs_client *fsc = ceph_sb_to_client(ci->vfs_inode.i_sb); | |
142 | struct ceph_osd_client *osdc = &fsc->client->osdc; | |
143 | s64 pool = ceph_file_layout_pg_pool(ci->i_layout); | |
144 | const char *pool_name; | |
145 | ||
5aea3dcd | 146 | down_read(&osdc->lock); |
695b7119 SW |
147 | pool_name = ceph_pg_pool_name_by_id(osdc->osdmap, pool); |
148 | if (pool_name) | |
149 | ret = snprintf(val, size, "%s", pool_name); | |
150 | else | |
151 | ret = snprintf(val, size, "%lld", (unsigned long long)pool); | |
5aea3dcd | 152 | up_read(&osdc->lock); |
695b7119 SW |
153 | return ret; |
154 | } | |
155 | ||
355da1eb SW |
156 | /* directories */ |
157 | ||
aa4066ed | 158 | static size_t ceph_vxattrcb_dir_entries(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
159 | size_t size) |
160 | { | |
161 | return snprintf(val, size, "%lld", ci->i_files + ci->i_subdirs); | |
162 | } | |
163 | ||
aa4066ed | 164 | static size_t ceph_vxattrcb_dir_files(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
165 | size_t size) |
166 | { | |
167 | return snprintf(val, size, "%lld", ci->i_files); | |
168 | } | |
169 | ||
aa4066ed | 170 | static size_t ceph_vxattrcb_dir_subdirs(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
171 | size_t size) |
172 | { | |
173 | return snprintf(val, size, "%lld", ci->i_subdirs); | |
174 | } | |
175 | ||
aa4066ed | 176 | static size_t ceph_vxattrcb_dir_rentries(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
177 | size_t size) |
178 | { | |
179 | return snprintf(val, size, "%lld", ci->i_rfiles + ci->i_rsubdirs); | |
180 | } | |
181 | ||
aa4066ed | 182 | static size_t ceph_vxattrcb_dir_rfiles(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
183 | size_t size) |
184 | { | |
185 | return snprintf(val, size, "%lld", ci->i_rfiles); | |
186 | } | |
187 | ||
aa4066ed | 188 | static size_t ceph_vxattrcb_dir_rsubdirs(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
189 | size_t size) |
190 | { | |
191 | return snprintf(val, size, "%lld", ci->i_rsubdirs); | |
192 | } | |
193 | ||
aa4066ed | 194 | static size_t ceph_vxattrcb_dir_rbytes(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
195 | size_t size) |
196 | { | |
197 | return snprintf(val, size, "%lld", ci->i_rbytes); | |
198 | } | |
199 | ||
aa4066ed | 200 | static size_t ceph_vxattrcb_dir_rctime(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
201 | size_t size) |
202 | { | |
3489b42a | 203 | return snprintf(val, size, "%ld.09%ld", (long)ci->i_rctime.tv_sec, |
355da1eb SW |
204 | (long)ci->i_rctime.tv_nsec); |
205 | } | |
206 | ||
32ab0bd7 | 207 | |
eb788084 | 208 | #define CEPH_XATTR_NAME(_type, _name) XATTR_CEPH_PREFIX #_type "." #_name |
695b7119 SW |
209 | #define CEPH_XATTR_NAME2(_type, _name, _name2) \ |
210 | XATTR_CEPH_PREFIX #_type "." #_name "." #_name2 | |
eb788084 | 211 | |
8860147a SW |
212 | #define XATTR_NAME_CEPH(_type, _name) \ |
213 | { \ | |
214 | .name = CEPH_XATTR_NAME(_type, _name), \ | |
215 | .name_size = sizeof (CEPH_XATTR_NAME(_type, _name)), \ | |
216 | .getxattr_cb = ceph_vxattrcb_ ## _type ## _ ## _name, \ | |
217 | .readonly = true, \ | |
218 | .hidden = false, \ | |
f36e4472 | 219 | .exists_cb = NULL, \ |
8860147a | 220 | } |
695b7119 SW |
221 | #define XATTR_LAYOUT_FIELD(_type, _name, _field) \ |
222 | { \ | |
223 | .name = CEPH_XATTR_NAME2(_type, _name, _field), \ | |
224 | .name_size = sizeof (CEPH_XATTR_NAME2(_type, _name, _field)), \ | |
225 | .getxattr_cb = ceph_vxattrcb_ ## _name ## _ ## _field, \ | |
226 | .readonly = false, \ | |
227 | .hidden = true, \ | |
228 | .exists_cb = ceph_vxattrcb_layout_exists, \ | |
229 | } | |
eb788084 | 230 | |
881a5fa2 | 231 | static struct ceph_vxattr ceph_dir_vxattrs[] = { |
1f08f2b0 SW |
232 | { |
233 | .name = "ceph.dir.layout", | |
234 | .name_size = sizeof("ceph.dir.layout"), | |
235 | .getxattr_cb = ceph_vxattrcb_layout, | |
236 | .readonly = false, | |
cc48c3e8 | 237 | .hidden = true, |
1f08f2b0 SW |
238 | .exists_cb = ceph_vxattrcb_layout_exists, |
239 | }, | |
695b7119 SW |
240 | XATTR_LAYOUT_FIELD(dir, layout, stripe_unit), |
241 | XATTR_LAYOUT_FIELD(dir, layout, stripe_count), | |
242 | XATTR_LAYOUT_FIELD(dir, layout, object_size), | |
243 | XATTR_LAYOUT_FIELD(dir, layout, pool), | |
eb788084 AE |
244 | XATTR_NAME_CEPH(dir, entries), |
245 | XATTR_NAME_CEPH(dir, files), | |
246 | XATTR_NAME_CEPH(dir, subdirs), | |
247 | XATTR_NAME_CEPH(dir, rentries), | |
248 | XATTR_NAME_CEPH(dir, rfiles), | |
249 | XATTR_NAME_CEPH(dir, rsubdirs), | |
250 | XATTR_NAME_CEPH(dir, rbytes), | |
251 | XATTR_NAME_CEPH(dir, rctime), | |
2c3dd4ff | 252 | { .name = NULL, 0 } /* Required table terminator */ |
355da1eb | 253 | }; |
3ce6cd12 | 254 | static size_t ceph_dir_vxattrs_name_size; /* total size of all names */ |
355da1eb SW |
255 | |
256 | /* files */ | |
257 | ||
881a5fa2 | 258 | static struct ceph_vxattr ceph_file_vxattrs[] = { |
32ab0bd7 SW |
259 | { |
260 | .name = "ceph.file.layout", | |
261 | .name_size = sizeof("ceph.file.layout"), | |
262 | .getxattr_cb = ceph_vxattrcb_layout, | |
263 | .readonly = false, | |
cc48c3e8 | 264 | .hidden = true, |
32ab0bd7 SW |
265 | .exists_cb = ceph_vxattrcb_layout_exists, |
266 | }, | |
695b7119 SW |
267 | XATTR_LAYOUT_FIELD(file, layout, stripe_unit), |
268 | XATTR_LAYOUT_FIELD(file, layout, stripe_count), | |
269 | XATTR_LAYOUT_FIELD(file, layout, object_size), | |
270 | XATTR_LAYOUT_FIELD(file, layout, pool), | |
2c3dd4ff | 271 | { .name = NULL, 0 } /* Required table terminator */ |
355da1eb | 272 | }; |
3ce6cd12 | 273 | static size_t ceph_file_vxattrs_name_size; /* total size of all names */ |
355da1eb | 274 | |
881a5fa2 | 275 | static struct ceph_vxattr *ceph_inode_vxattrs(struct inode *inode) |
355da1eb SW |
276 | { |
277 | if (S_ISDIR(inode->i_mode)) | |
278 | return ceph_dir_vxattrs; | |
279 | else if (S_ISREG(inode->i_mode)) | |
280 | return ceph_file_vxattrs; | |
281 | return NULL; | |
282 | } | |
283 | ||
3ce6cd12 AE |
284 | static size_t ceph_vxattrs_name_size(struct ceph_vxattr *vxattrs) |
285 | { | |
286 | if (vxattrs == ceph_dir_vxattrs) | |
287 | return ceph_dir_vxattrs_name_size; | |
288 | if (vxattrs == ceph_file_vxattrs) | |
289 | return ceph_file_vxattrs_name_size; | |
0abb43dc | 290 | BUG_ON(vxattrs); |
3ce6cd12 AE |
291 | return 0; |
292 | } | |
293 | ||
294 | /* | |
295 | * Compute the aggregate size (including terminating '\0') of all | |
296 | * virtual extended attribute names in the given vxattr table. | |
297 | */ | |
298 | static size_t __init vxattrs_name_size(struct ceph_vxattr *vxattrs) | |
299 | { | |
300 | struct ceph_vxattr *vxattr; | |
301 | size_t size = 0; | |
302 | ||
303 | for (vxattr = vxattrs; vxattr->name; vxattr++) | |
8860147a SW |
304 | if (!vxattr->hidden) |
305 | size += vxattr->name_size; | |
3ce6cd12 AE |
306 | |
307 | return size; | |
308 | } | |
309 | ||
310 | /* Routines called at initialization and exit time */ | |
311 | ||
312 | void __init ceph_xattr_init(void) | |
313 | { | |
314 | ceph_dir_vxattrs_name_size = vxattrs_name_size(ceph_dir_vxattrs); | |
315 | ceph_file_vxattrs_name_size = vxattrs_name_size(ceph_file_vxattrs); | |
316 | } | |
317 | ||
318 | void ceph_xattr_exit(void) | |
319 | { | |
320 | ceph_dir_vxattrs_name_size = 0; | |
321 | ceph_file_vxattrs_name_size = 0; | |
322 | } | |
323 | ||
881a5fa2 | 324 | static struct ceph_vxattr *ceph_match_vxattr(struct inode *inode, |
355da1eb SW |
325 | const char *name) |
326 | { | |
881a5fa2 | 327 | struct ceph_vxattr *vxattr = ceph_inode_vxattrs(inode); |
06476a69 AE |
328 | |
329 | if (vxattr) { | |
330 | while (vxattr->name) { | |
331 | if (!strcmp(vxattr->name, name)) | |
332 | return vxattr; | |
333 | vxattr++; | |
334 | } | |
335 | } | |
336 | ||
355da1eb SW |
337 | return NULL; |
338 | } | |
339 | ||
340 | static int __set_xattr(struct ceph_inode_info *ci, | |
341 | const char *name, int name_len, | |
342 | const char *val, int val_len, | |
fbc0b970 | 343 | int flags, int update_xattr, |
355da1eb SW |
344 | struct ceph_inode_xattr **newxattr) |
345 | { | |
346 | struct rb_node **p; | |
347 | struct rb_node *parent = NULL; | |
348 | struct ceph_inode_xattr *xattr = NULL; | |
349 | int c; | |
350 | int new = 0; | |
351 | ||
352 | p = &ci->i_xattrs.index.rb_node; | |
353 | while (*p) { | |
354 | parent = *p; | |
355 | xattr = rb_entry(parent, struct ceph_inode_xattr, node); | |
356 | c = strncmp(name, xattr->name, min(name_len, xattr->name_len)); | |
357 | if (c < 0) | |
358 | p = &(*p)->rb_left; | |
359 | else if (c > 0) | |
360 | p = &(*p)->rb_right; | |
361 | else { | |
362 | if (name_len == xattr->name_len) | |
363 | break; | |
364 | else if (name_len < xattr->name_len) | |
365 | p = &(*p)->rb_left; | |
366 | else | |
367 | p = &(*p)->rb_right; | |
368 | } | |
369 | xattr = NULL; | |
370 | } | |
371 | ||
fbc0b970 YZ |
372 | if (update_xattr) { |
373 | int err = 0; | |
374 | if (xattr && (flags & XATTR_CREATE)) | |
375 | err = -EEXIST; | |
376 | else if (!xattr && (flags & XATTR_REPLACE)) | |
377 | err = -ENODATA; | |
378 | if (err) { | |
379 | kfree(name); | |
380 | kfree(val); | |
381 | return err; | |
382 | } | |
bcdfeb2e YZ |
383 | if (update_xattr < 0) { |
384 | if (xattr) | |
385 | __remove_xattr(ci, xattr); | |
386 | kfree(name); | |
387 | return 0; | |
388 | } | |
fbc0b970 YZ |
389 | } |
390 | ||
355da1eb SW |
391 | if (!xattr) { |
392 | new = 1; | |
393 | xattr = *newxattr; | |
394 | xattr->name = name; | |
395 | xattr->name_len = name_len; | |
fbc0b970 | 396 | xattr->should_free_name = update_xattr; |
355da1eb SW |
397 | |
398 | ci->i_xattrs.count++; | |
399 | dout("__set_xattr count=%d\n", ci->i_xattrs.count); | |
400 | } else { | |
401 | kfree(*newxattr); | |
402 | *newxattr = NULL; | |
403 | if (xattr->should_free_val) | |
404 | kfree((void *)xattr->val); | |
405 | ||
fbc0b970 | 406 | if (update_xattr) { |
355da1eb SW |
407 | kfree((void *)name); |
408 | name = xattr->name; | |
409 | } | |
410 | ci->i_xattrs.names_size -= xattr->name_len; | |
411 | ci->i_xattrs.vals_size -= xattr->val_len; | |
412 | } | |
355da1eb SW |
413 | ci->i_xattrs.names_size += name_len; |
414 | ci->i_xattrs.vals_size += val_len; | |
415 | if (val) | |
416 | xattr->val = val; | |
417 | else | |
418 | xattr->val = ""; | |
419 | ||
420 | xattr->val_len = val_len; | |
fbc0b970 YZ |
421 | xattr->dirty = update_xattr; |
422 | xattr->should_free_val = (val && update_xattr); | |
355da1eb SW |
423 | |
424 | if (new) { | |
425 | rb_link_node(&xattr->node, parent, p); | |
426 | rb_insert_color(&xattr->node, &ci->i_xattrs.index); | |
427 | dout("__set_xattr_val p=%p\n", p); | |
428 | } | |
429 | ||
430 | dout("__set_xattr_val added %llx.%llx xattr %p %s=%.*s\n", | |
431 | ceph_vinop(&ci->vfs_inode), xattr, name, val_len, val); | |
432 | ||
433 | return 0; | |
434 | } | |
435 | ||
436 | static struct ceph_inode_xattr *__get_xattr(struct ceph_inode_info *ci, | |
437 | const char *name) | |
438 | { | |
439 | struct rb_node **p; | |
440 | struct rb_node *parent = NULL; | |
441 | struct ceph_inode_xattr *xattr = NULL; | |
17db143f | 442 | int name_len = strlen(name); |
355da1eb SW |
443 | int c; |
444 | ||
445 | p = &ci->i_xattrs.index.rb_node; | |
446 | while (*p) { | |
447 | parent = *p; | |
448 | xattr = rb_entry(parent, struct ceph_inode_xattr, node); | |
449 | c = strncmp(name, xattr->name, xattr->name_len); | |
17db143f SW |
450 | if (c == 0 && name_len > xattr->name_len) |
451 | c = 1; | |
355da1eb SW |
452 | if (c < 0) |
453 | p = &(*p)->rb_left; | |
454 | else if (c > 0) | |
455 | p = &(*p)->rb_right; | |
456 | else { | |
457 | dout("__get_xattr %s: found %.*s\n", name, | |
458 | xattr->val_len, xattr->val); | |
459 | return xattr; | |
460 | } | |
461 | } | |
462 | ||
463 | dout("__get_xattr %s: not found\n", name); | |
464 | ||
465 | return NULL; | |
466 | } | |
467 | ||
468 | static void __free_xattr(struct ceph_inode_xattr *xattr) | |
469 | { | |
470 | BUG_ON(!xattr); | |
471 | ||
472 | if (xattr->should_free_name) | |
473 | kfree((void *)xattr->name); | |
474 | if (xattr->should_free_val) | |
475 | kfree((void *)xattr->val); | |
476 | ||
477 | kfree(xattr); | |
478 | } | |
479 | ||
480 | static int __remove_xattr(struct ceph_inode_info *ci, | |
481 | struct ceph_inode_xattr *xattr) | |
482 | { | |
483 | if (!xattr) | |
524186ac | 484 | return -ENODATA; |
355da1eb SW |
485 | |
486 | rb_erase(&xattr->node, &ci->i_xattrs.index); | |
487 | ||
488 | if (xattr->should_free_name) | |
489 | kfree((void *)xattr->name); | |
490 | if (xattr->should_free_val) | |
491 | kfree((void *)xattr->val); | |
492 | ||
493 | ci->i_xattrs.names_size -= xattr->name_len; | |
494 | ci->i_xattrs.vals_size -= xattr->val_len; | |
495 | ci->i_xattrs.count--; | |
496 | kfree(xattr); | |
497 | ||
498 | return 0; | |
499 | } | |
500 | ||
355da1eb SW |
501 | static char *__copy_xattr_names(struct ceph_inode_info *ci, |
502 | char *dest) | |
503 | { | |
504 | struct rb_node *p; | |
505 | struct ceph_inode_xattr *xattr = NULL; | |
506 | ||
507 | p = rb_first(&ci->i_xattrs.index); | |
508 | dout("__copy_xattr_names count=%d\n", ci->i_xattrs.count); | |
509 | ||
510 | while (p) { | |
511 | xattr = rb_entry(p, struct ceph_inode_xattr, node); | |
512 | memcpy(dest, xattr->name, xattr->name_len); | |
513 | dest[xattr->name_len] = '\0'; | |
514 | ||
515 | dout("dest=%s %p (%s) (%d/%d)\n", dest, xattr, xattr->name, | |
516 | xattr->name_len, ci->i_xattrs.names_size); | |
517 | ||
518 | dest += xattr->name_len + 1; | |
519 | p = rb_next(p); | |
520 | } | |
521 | ||
522 | return dest; | |
523 | } | |
524 | ||
525 | void __ceph_destroy_xattrs(struct ceph_inode_info *ci) | |
526 | { | |
527 | struct rb_node *p, *tmp; | |
528 | struct ceph_inode_xattr *xattr = NULL; | |
529 | ||
530 | p = rb_first(&ci->i_xattrs.index); | |
531 | ||
532 | dout("__ceph_destroy_xattrs p=%p\n", p); | |
533 | ||
534 | while (p) { | |
535 | xattr = rb_entry(p, struct ceph_inode_xattr, node); | |
536 | tmp = p; | |
537 | p = rb_next(tmp); | |
538 | dout("__ceph_destroy_xattrs next p=%p (%.*s)\n", p, | |
539 | xattr->name_len, xattr->name); | |
540 | rb_erase(tmp, &ci->i_xattrs.index); | |
541 | ||
542 | __free_xattr(xattr); | |
543 | } | |
544 | ||
545 | ci->i_xattrs.names_size = 0; | |
546 | ci->i_xattrs.vals_size = 0; | |
547 | ci->i_xattrs.index_version = 0; | |
548 | ci->i_xattrs.count = 0; | |
549 | ci->i_xattrs.index = RB_ROOT; | |
550 | } | |
551 | ||
552 | static int __build_xattrs(struct inode *inode) | |
be655596 SW |
553 | __releases(ci->i_ceph_lock) |
554 | __acquires(ci->i_ceph_lock) | |
355da1eb SW |
555 | { |
556 | u32 namelen; | |
557 | u32 numattr = 0; | |
558 | void *p, *end; | |
559 | u32 len; | |
560 | const char *name, *val; | |
561 | struct ceph_inode_info *ci = ceph_inode(inode); | |
562 | int xattr_version; | |
563 | struct ceph_inode_xattr **xattrs = NULL; | |
63ff78b2 | 564 | int err = 0; |
355da1eb SW |
565 | int i; |
566 | ||
567 | dout("__build_xattrs() len=%d\n", | |
568 | ci->i_xattrs.blob ? (int)ci->i_xattrs.blob->vec.iov_len : 0); | |
569 | ||
570 | if (ci->i_xattrs.index_version >= ci->i_xattrs.version) | |
571 | return 0; /* already built */ | |
572 | ||
573 | __ceph_destroy_xattrs(ci); | |
574 | ||
575 | start: | |
576 | /* updated internal xattr rb tree */ | |
577 | if (ci->i_xattrs.blob && ci->i_xattrs.blob->vec.iov_len > 4) { | |
578 | p = ci->i_xattrs.blob->vec.iov_base; | |
579 | end = p + ci->i_xattrs.blob->vec.iov_len; | |
580 | ceph_decode_32_safe(&p, end, numattr, bad); | |
581 | xattr_version = ci->i_xattrs.version; | |
be655596 | 582 | spin_unlock(&ci->i_ceph_lock); |
355da1eb | 583 | |
7e8a2952 | 584 | xattrs = kcalloc(numattr, sizeof(struct ceph_inode_xattr *), |
355da1eb SW |
585 | GFP_NOFS); |
586 | err = -ENOMEM; | |
587 | if (!xattrs) | |
588 | goto bad_lock; | |
1a295bd8 | 589 | |
355da1eb SW |
590 | for (i = 0; i < numattr; i++) { |
591 | xattrs[i] = kmalloc(sizeof(struct ceph_inode_xattr), | |
592 | GFP_NOFS); | |
593 | if (!xattrs[i]) | |
594 | goto bad_lock; | |
595 | } | |
596 | ||
be655596 | 597 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
598 | if (ci->i_xattrs.version != xattr_version) { |
599 | /* lost a race, retry */ | |
600 | for (i = 0; i < numattr; i++) | |
601 | kfree(xattrs[i]); | |
602 | kfree(xattrs); | |
21ec6ffa | 603 | xattrs = NULL; |
355da1eb SW |
604 | goto start; |
605 | } | |
606 | err = -EIO; | |
607 | while (numattr--) { | |
608 | ceph_decode_32_safe(&p, end, len, bad); | |
609 | namelen = len; | |
610 | name = p; | |
611 | p += len; | |
612 | ceph_decode_32_safe(&p, end, len, bad); | |
613 | val = p; | |
614 | p += len; | |
615 | ||
616 | err = __set_xattr(ci, name, namelen, val, len, | |
fbc0b970 | 617 | 0, 0, &xattrs[numattr]); |
355da1eb SW |
618 | |
619 | if (err < 0) | |
620 | goto bad; | |
621 | } | |
622 | kfree(xattrs); | |
623 | } | |
624 | ci->i_xattrs.index_version = ci->i_xattrs.version; | |
625 | ci->i_xattrs.dirty = false; | |
626 | ||
627 | return err; | |
628 | bad_lock: | |
be655596 | 629 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
630 | bad: |
631 | if (xattrs) { | |
632 | for (i = 0; i < numattr; i++) | |
633 | kfree(xattrs[i]); | |
634 | kfree(xattrs); | |
635 | } | |
636 | ci->i_xattrs.names_size = 0; | |
637 | return err; | |
638 | } | |
639 | ||
640 | static int __get_required_blob_size(struct ceph_inode_info *ci, int name_size, | |
641 | int val_size) | |
642 | { | |
643 | /* | |
644 | * 4 bytes for the length, and additional 4 bytes per each xattr name, | |
645 | * 4 bytes per each value | |
646 | */ | |
647 | int size = 4 + ci->i_xattrs.count*(4 + 4) + | |
648 | ci->i_xattrs.names_size + | |
649 | ci->i_xattrs.vals_size; | |
650 | dout("__get_required_blob_size c=%d names.size=%d vals.size=%d\n", | |
651 | ci->i_xattrs.count, ci->i_xattrs.names_size, | |
652 | ci->i_xattrs.vals_size); | |
653 | ||
654 | if (name_size) | |
655 | size += 4 + 4 + name_size + val_size; | |
656 | ||
657 | return size; | |
658 | } | |
659 | ||
660 | /* | |
661 | * If there are dirty xattrs, reencode xattrs into the prealloc_blob | |
662 | * and swap into place. | |
663 | */ | |
664 | void __ceph_build_xattrs_blob(struct ceph_inode_info *ci) | |
665 | { | |
666 | struct rb_node *p; | |
667 | struct ceph_inode_xattr *xattr = NULL; | |
668 | void *dest; | |
669 | ||
670 | dout("__build_xattrs_blob %p\n", &ci->vfs_inode); | |
671 | if (ci->i_xattrs.dirty) { | |
672 | int need = __get_required_blob_size(ci, 0, 0); | |
673 | ||
674 | BUG_ON(need > ci->i_xattrs.prealloc_blob->alloc_len); | |
675 | ||
676 | p = rb_first(&ci->i_xattrs.index); | |
677 | dest = ci->i_xattrs.prealloc_blob->vec.iov_base; | |
678 | ||
679 | ceph_encode_32(&dest, ci->i_xattrs.count); | |
680 | while (p) { | |
681 | xattr = rb_entry(p, struct ceph_inode_xattr, node); | |
682 | ||
683 | ceph_encode_32(&dest, xattr->name_len); | |
684 | memcpy(dest, xattr->name, xattr->name_len); | |
685 | dest += xattr->name_len; | |
686 | ceph_encode_32(&dest, xattr->val_len); | |
687 | memcpy(dest, xattr->val, xattr->val_len); | |
688 | dest += xattr->val_len; | |
689 | ||
690 | p = rb_next(p); | |
691 | } | |
692 | ||
693 | /* adjust buffer len; it may be larger than we need */ | |
694 | ci->i_xattrs.prealloc_blob->vec.iov_len = | |
695 | dest - ci->i_xattrs.prealloc_blob->vec.iov_base; | |
696 | ||
b6c1d5b8 SW |
697 | if (ci->i_xattrs.blob) |
698 | ceph_buffer_put(ci->i_xattrs.blob); | |
355da1eb SW |
699 | ci->i_xattrs.blob = ci->i_xattrs.prealloc_blob; |
700 | ci->i_xattrs.prealloc_blob = NULL; | |
701 | ci->i_xattrs.dirty = false; | |
4a625be4 | 702 | ci->i_xattrs.version++; |
355da1eb SW |
703 | } |
704 | } | |
705 | ||
315f2408 YZ |
706 | static inline int __get_request_mask(struct inode *in) { |
707 | struct ceph_mds_request *req = current->journal_info; | |
708 | int mask = 0; | |
709 | if (req && req->r_target_inode == in) { | |
710 | if (req->r_op == CEPH_MDS_OP_LOOKUP || | |
711 | req->r_op == CEPH_MDS_OP_LOOKUPINO || | |
712 | req->r_op == CEPH_MDS_OP_LOOKUPPARENT || | |
713 | req->r_op == CEPH_MDS_OP_GETATTR) { | |
714 | mask = le32_to_cpu(req->r_args.getattr.mask); | |
715 | } else if (req->r_op == CEPH_MDS_OP_OPEN || | |
716 | req->r_op == CEPH_MDS_OP_CREATE) { | |
717 | mask = le32_to_cpu(req->r_args.open.mask); | |
718 | } | |
719 | } | |
720 | return mask; | |
721 | } | |
722 | ||
7221fe4c | 723 | ssize_t __ceph_getxattr(struct inode *inode, const char *name, void *value, |
355da1eb SW |
724 | size_t size) |
725 | { | |
355da1eb | 726 | struct ceph_inode_info *ci = ceph_inode(inode); |
355da1eb | 727 | struct ceph_inode_xattr *xattr; |
881a5fa2 | 728 | struct ceph_vxattr *vxattr = NULL; |
315f2408 YZ |
729 | int req_mask; |
730 | int err; | |
355da1eb | 731 | |
0bee82fb SW |
732 | /* let's see if a virtual xattr was requested */ |
733 | vxattr = ceph_match_vxattr(inode, name); | |
29dccfa5 YZ |
734 | if (vxattr) { |
735 | err = -ENODATA; | |
736 | if (!(vxattr->exists_cb && !vxattr->exists_cb(ci))) | |
737 | err = vxattr->getxattr_cb(ci, value, size); | |
a1dc1937 | 738 | return err; |
0bee82fb SW |
739 | } |
740 | ||
315f2408 YZ |
741 | req_mask = __get_request_mask(inode); |
742 | ||
a1dc1937 | 743 | spin_lock(&ci->i_ceph_lock); |
744 | dout("getxattr %p ver=%lld index_ver=%lld\n", inode, | |
745 | ci->i_xattrs.version, ci->i_xattrs.index_version); | |
746 | ||
508b32d8 | 747 | if (ci->i_xattrs.version == 0 || |
315f2408 YZ |
748 | !((req_mask & CEPH_CAP_XATTR_SHARED) || |
749 | __ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 1))) { | |
be655596 | 750 | spin_unlock(&ci->i_ceph_lock); |
315f2408 YZ |
751 | |
752 | /* security module gets xattr while filling trace */ | |
753 | if (current->journal_info != NULL) { | |
754 | pr_warn_ratelimited("sync getxattr %p " | |
755 | "during filling trace\n", inode); | |
756 | return -EBUSY; | |
757 | } | |
758 | ||
355da1eb | 759 | /* get xattrs from mds (if we don't already have them) */ |
508b32d8 | 760 | err = ceph_do_getattr(inode, CEPH_STAT_CAP_XATTR, true); |
355da1eb SW |
761 | if (err) |
762 | return err; | |
508b32d8 | 763 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
764 | } |
765 | ||
355da1eb SW |
766 | err = __build_xattrs(inode); |
767 | if (err < 0) | |
768 | goto out; | |
769 | ||
355da1eb SW |
770 | err = -ENODATA; /* == ENOATTR */ |
771 | xattr = __get_xattr(ci, name); | |
0bee82fb | 772 | if (!xattr) |
355da1eb | 773 | goto out; |
355da1eb SW |
774 | |
775 | err = -ERANGE; | |
776 | if (size && size < xattr->val_len) | |
777 | goto out; | |
778 | ||
779 | err = xattr->val_len; | |
780 | if (size == 0) | |
781 | goto out; | |
782 | ||
783 | memcpy(value, xattr->val, xattr->val_len); | |
784 | ||
315f2408 YZ |
785 | if (current->journal_info != NULL && |
786 | !strncmp(name, XATTR_SECURITY_PREFIX, XATTR_SECURITY_PREFIX_LEN)) | |
787 | ci->i_ceph_flags |= CEPH_I_SEC_INITED; | |
355da1eb | 788 | out: |
be655596 | 789 | spin_unlock(&ci->i_ceph_lock); |
355da1eb SW |
790 | return err; |
791 | } | |
792 | ||
793 | ssize_t ceph_listxattr(struct dentry *dentry, char *names, size_t size) | |
794 | { | |
2b0143b5 | 795 | struct inode *inode = d_inode(dentry); |
355da1eb | 796 | struct ceph_inode_info *ci = ceph_inode(inode); |
881a5fa2 | 797 | struct ceph_vxattr *vxattrs = ceph_inode_vxattrs(inode); |
355da1eb SW |
798 | u32 vir_namelen = 0; |
799 | u32 namelen; | |
800 | int err; | |
801 | u32 len; | |
802 | int i; | |
803 | ||
be655596 | 804 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
805 | dout("listxattr %p ver=%lld index_ver=%lld\n", inode, |
806 | ci->i_xattrs.version, ci->i_xattrs.index_version); | |
807 | ||
508b32d8 YZ |
808 | if (ci->i_xattrs.version == 0 || |
809 | !__ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 1)) { | |
be655596 | 810 | spin_unlock(&ci->i_ceph_lock); |
508b32d8 | 811 | err = ceph_do_getattr(inode, CEPH_STAT_CAP_XATTR, true); |
355da1eb SW |
812 | if (err) |
813 | return err; | |
508b32d8 | 814 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
815 | } |
816 | ||
355da1eb SW |
817 | err = __build_xattrs(inode); |
818 | if (err < 0) | |
819 | goto out; | |
3ce6cd12 AE |
820 | /* |
821 | * Start with virtual dir xattr names (if any) (including | |
822 | * terminating '\0' characters for each). | |
823 | */ | |
824 | vir_namelen = ceph_vxattrs_name_size(vxattrs); | |
825 | ||
355da1eb | 826 | /* adding 1 byte per each variable due to the null termination */ |
b65917dd | 827 | namelen = ci->i_xattrs.names_size + ci->i_xattrs.count; |
355da1eb | 828 | err = -ERANGE; |
b65917dd | 829 | if (size && vir_namelen + namelen > size) |
355da1eb SW |
830 | goto out; |
831 | ||
b65917dd | 832 | err = namelen + vir_namelen; |
355da1eb SW |
833 | if (size == 0) |
834 | goto out; | |
835 | ||
836 | names = __copy_xattr_names(ci, names); | |
837 | ||
838 | /* virtual xattr names, too */ | |
b65917dd SW |
839 | err = namelen; |
840 | if (vxattrs) { | |
355da1eb | 841 | for (i = 0; vxattrs[i].name; i++) { |
b65917dd SW |
842 | if (!vxattrs[i].hidden && |
843 | !(vxattrs[i].exists_cb && | |
844 | !vxattrs[i].exists_cb(ci))) { | |
845 | len = sprintf(names, "%s", vxattrs[i].name); | |
846 | names += len + 1; | |
847 | err += len + 1; | |
848 | } | |
355da1eb | 849 | } |
b65917dd | 850 | } |
355da1eb SW |
851 | |
852 | out: | |
be655596 | 853 | spin_unlock(&ci->i_ceph_lock); |
355da1eb SW |
854 | return err; |
855 | } | |
856 | ||
a26fecca | 857 | static int ceph_sync_setxattr(struct inode *inode, const char *name, |
355da1eb SW |
858 | const char *value, size_t size, int flags) |
859 | { | |
a26fecca | 860 | struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb); |
355da1eb | 861 | struct ceph_inode_info *ci = ceph_inode(inode); |
355da1eb | 862 | struct ceph_mds_request *req; |
3d14c5d2 | 863 | struct ceph_mds_client *mdsc = fsc->mdsc; |
25e6bae3 | 864 | struct ceph_pagelist *pagelist = NULL; |
04303d8a | 865 | int op = CEPH_MDS_OP_SETXATTR; |
355da1eb | 866 | int err; |
25e6bae3 | 867 | |
0aeff37a | 868 | if (size > 0) { |
25e6bae3 YZ |
869 | /* copy value into pagelist */ |
870 | pagelist = kmalloc(sizeof(*pagelist), GFP_NOFS); | |
871 | if (!pagelist) | |
355da1eb | 872 | return -ENOMEM; |
25e6bae3 YZ |
873 | |
874 | ceph_pagelist_init(pagelist); | |
875 | err = ceph_pagelist_append(pagelist, value, size); | |
876 | if (err) | |
877 | goto out; | |
0aeff37a | 878 | } else if (!value) { |
04303d8a YZ |
879 | if (flags & CEPH_XATTR_REPLACE) |
880 | op = CEPH_MDS_OP_RMXATTR; | |
881 | else | |
882 | flags |= CEPH_XATTR_REMOVE; | |
355da1eb SW |
883 | } |
884 | ||
885 | dout("setxattr value=%.*s\n", (int)size, value); | |
886 | ||
887 | /* do request */ | |
04303d8a | 888 | req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS); |
60d87733 JL |
889 | if (IS_ERR(req)) { |
890 | err = PTR_ERR(req); | |
891 | goto out; | |
892 | } | |
a149bb9a | 893 | |
355da1eb | 894 | req->r_path2 = kstrdup(name, GFP_NOFS); |
a149bb9a SK |
895 | if (!req->r_path2) { |
896 | ceph_mdsc_put_request(req); | |
897 | err = -ENOMEM; | |
898 | goto out; | |
899 | } | |
355da1eb | 900 | |
04303d8a YZ |
901 | if (op == CEPH_MDS_OP_SETXATTR) { |
902 | req->r_args.setxattr.flags = cpu_to_le32(flags); | |
903 | req->r_pagelist = pagelist; | |
904 | pagelist = NULL; | |
905 | } | |
355da1eb | 906 | |
a149bb9a SK |
907 | req->r_inode = inode; |
908 | ihold(inode); | |
909 | req->r_num_caps = 1; | |
910 | req->r_inode_drop = CEPH_CAP_XATTR_SHARED; | |
911 | ||
355da1eb | 912 | dout("xattr.ver (before): %lld\n", ci->i_xattrs.version); |
752c8bdc | 913 | err = ceph_mdsc_do_request(mdsc, NULL, req); |
355da1eb SW |
914 | ceph_mdsc_put_request(req); |
915 | dout("xattr.ver (after): %lld\n", ci->i_xattrs.version); | |
916 | ||
917 | out: | |
25e6bae3 YZ |
918 | if (pagelist) |
919 | ceph_pagelist_release(pagelist); | |
355da1eb SW |
920 | return err; |
921 | } | |
922 | ||
a26fecca | 923 | int __ceph_setxattr(struct inode *inode, const char *name, |
7221fe4c | 924 | const void *value, size_t size, int flags) |
355da1eb | 925 | { |
881a5fa2 | 926 | struct ceph_vxattr *vxattr; |
355da1eb | 927 | struct ceph_inode_info *ci = ceph_inode(inode); |
a26fecca | 928 | struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc; |
f66fd9f0 | 929 | struct ceph_cap_flush *prealloc_cf = NULL; |
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 | 938 | int required_blob_size; |
604d1b02 | 939 | bool lock_snap_rwsem = false; |
355da1eb | 940 | |
2cdeb1e4 AG |
941 | if (ceph_snap(inode) != CEPH_NOSNAP) |
942 | return -EROFS; | |
355da1eb | 943 | |
06476a69 AE |
944 | vxattr = ceph_match_vxattr(inode, name); |
945 | if (vxattr && vxattr->readonly) | |
946 | return -EOPNOTSUPP; | |
355da1eb | 947 | |
3adf654d SW |
948 | /* pass any unhandled ceph.* xattrs through to the MDS */ |
949 | if (!strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN)) | |
950 | goto do_sync_unlocked; | |
951 | ||
355da1eb SW |
952 | /* preallocate memory for xattr name, value, index node */ |
953 | err = -ENOMEM; | |
61413c2f | 954 | newname = kmemdup(name, name_len + 1, GFP_NOFS); |
355da1eb SW |
955 | if (!newname) |
956 | goto out; | |
355da1eb SW |
957 | |
958 | if (val_len) { | |
b829c195 | 959 | newval = kmemdup(value, val_len, GFP_NOFS); |
355da1eb SW |
960 | if (!newval) |
961 | goto out; | |
355da1eb SW |
962 | } |
963 | ||
964 | xattr = kmalloc(sizeof(struct ceph_inode_xattr), GFP_NOFS); | |
965 | if (!xattr) | |
966 | goto out; | |
967 | ||
f66fd9f0 YZ |
968 | prealloc_cf = ceph_alloc_cap_flush(); |
969 | if (!prealloc_cf) | |
970 | goto out; | |
971 | ||
be655596 | 972 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
973 | retry: |
974 | issued = __ceph_caps_issued(ci, NULL); | |
508b32d8 | 975 | if (ci->i_xattrs.version == 0 || !(issued & CEPH_CAP_XATTR_EXCL)) |
355da1eb | 976 | goto do_sync; |
604d1b02 YZ |
977 | |
978 | if (!lock_snap_rwsem && !ci->i_head_snapc) { | |
979 | lock_snap_rwsem = true; | |
980 | if (!down_read_trylock(&mdsc->snap_rwsem)) { | |
981 | spin_unlock(&ci->i_ceph_lock); | |
982 | down_read(&mdsc->snap_rwsem); | |
983 | spin_lock(&ci->i_ceph_lock); | |
984 | goto retry; | |
985 | } | |
986 | } | |
987 | ||
988 | dout("setxattr %p issued %s\n", inode, ceph_cap_string(issued)); | |
355da1eb SW |
989 | __build_xattrs(inode); |
990 | ||
991 | required_blob_size = __get_required_blob_size(ci, name_len, val_len); | |
992 | ||
993 | if (!ci->i_xattrs.prealloc_blob || | |
994 | required_blob_size > ci->i_xattrs.prealloc_blob->alloc_len) { | |
18fa8b3f | 995 | struct ceph_buffer *blob; |
355da1eb | 996 | |
be655596 | 997 | spin_unlock(&ci->i_ceph_lock); |
355da1eb | 998 | dout(" preaallocating new blob size=%d\n", required_blob_size); |
b6c1d5b8 | 999 | blob = ceph_buffer_new(required_blob_size, GFP_NOFS); |
355da1eb | 1000 | if (!blob) |
604d1b02 | 1001 | goto do_sync_unlocked; |
be655596 | 1002 | spin_lock(&ci->i_ceph_lock); |
b6c1d5b8 SW |
1003 | if (ci->i_xattrs.prealloc_blob) |
1004 | ceph_buffer_put(ci->i_xattrs.prealloc_blob); | |
355da1eb SW |
1005 | ci->i_xattrs.prealloc_blob = blob; |
1006 | goto retry; | |
1007 | } | |
1008 | ||
bcdfeb2e YZ |
1009 | err = __set_xattr(ci, newname, name_len, newval, val_len, |
1010 | flags, value ? 1 : -1, &xattr); | |
18fa8b3f | 1011 | |
fbc0b970 | 1012 | if (!err) { |
f66fd9f0 YZ |
1013 | dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_XATTR_EXCL, |
1014 | &prealloc_cf); | |
fbc0b970 | 1015 | ci->i_xattrs.dirty = true; |
8bbd4714 | 1016 | inode->i_ctime = current_fs_time(inode->i_sb); |
fbc0b970 | 1017 | } |
18fa8b3f | 1018 | |
be655596 | 1019 | spin_unlock(&ci->i_ceph_lock); |
604d1b02 YZ |
1020 | if (lock_snap_rwsem) |
1021 | up_read(&mdsc->snap_rwsem); | |
fca65b4a SW |
1022 | if (dirty) |
1023 | __mark_inode_dirty(inode, dirty); | |
f66fd9f0 | 1024 | ceph_free_cap_flush(prealloc_cf); |
355da1eb SW |
1025 | return err; |
1026 | ||
1027 | do_sync: | |
be655596 | 1028 | spin_unlock(&ci->i_ceph_lock); |
3adf654d | 1029 | do_sync_unlocked: |
604d1b02 YZ |
1030 | if (lock_snap_rwsem) |
1031 | up_read(&mdsc->snap_rwsem); | |
315f2408 YZ |
1032 | |
1033 | /* security module set xattr while filling trace */ | |
1034 | if (current->journal_info != NULL) { | |
1035 | pr_warn_ratelimited("sync setxattr %p " | |
1036 | "during filling trace\n", inode); | |
1037 | err = -EBUSY; | |
1038 | } else { | |
a26fecca | 1039 | err = ceph_sync_setxattr(inode, name, value, size, flags); |
315f2408 | 1040 | } |
355da1eb | 1041 | out: |
f66fd9f0 | 1042 | ceph_free_cap_flush(prealloc_cf); |
355da1eb SW |
1043 | kfree(newname); |
1044 | kfree(newval); | |
1045 | kfree(xattr); | |
1046 | return err; | |
1047 | } | |
1048 | ||
2cdeb1e4 AG |
1049 | static int ceph_get_xattr_handler(const struct xattr_handler *handler, |
1050 | struct dentry *dentry, struct inode *inode, | |
1051 | const char *name, void *value, size_t size) | |
7221fe4c | 1052 | { |
2cdeb1e4 AG |
1053 | if (!ceph_is_valid_xattr(name)) |
1054 | return -EOPNOTSUPP; | |
1055 | return __ceph_getxattr(inode, name, value, size); | |
1056 | } | |
7221fe4c | 1057 | |
2cdeb1e4 | 1058 | static int ceph_set_xattr_handler(const struct xattr_handler *handler, |
59301226 AV |
1059 | struct dentry *unused, struct inode *inode, |
1060 | const char *name, const void *value, | |
1061 | size_t size, int flags) | |
2cdeb1e4 AG |
1062 | { |
1063 | if (!ceph_is_valid_xattr(name)) | |
1064 | return -EOPNOTSUPP; | |
59301226 | 1065 | return __ceph_setxattr(inode, name, value, size, flags); |
7221fe4c | 1066 | } |
315f2408 | 1067 | |
2cdeb1e4 AG |
1068 | const struct xattr_handler ceph_other_xattr_handler = { |
1069 | .prefix = "", /* match any name => handlers called with full name */ | |
1070 | .get = ceph_get_xattr_handler, | |
1071 | .set = ceph_set_xattr_handler, | |
1072 | }; | |
1073 | ||
315f2408 YZ |
1074 | #ifdef CONFIG_SECURITY |
1075 | bool ceph_security_xattr_wanted(struct inode *in) | |
1076 | { | |
1077 | return in->i_security != NULL; | |
1078 | } | |
1079 | ||
1080 | bool ceph_security_xattr_deadlock(struct inode *in) | |
1081 | { | |
1082 | struct ceph_inode_info *ci; | |
1083 | bool ret; | |
1084 | if (in->i_security == NULL) | |
1085 | return false; | |
1086 | ci = ceph_inode(in); | |
1087 | spin_lock(&ci->i_ceph_lock); | |
1088 | ret = !(ci->i_ceph_flags & CEPH_I_SEC_INITED) && | |
1089 | !(ci->i_xattrs.version > 0 && | |
1090 | __ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 0)); | |
1091 | spin_unlock(&ci->i_ceph_lock); | |
1092 | return ret; | |
1093 | } | |
1094 | #endif |