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> | |
5a0e3ad6 | 9 | #include <linux/slab.h> |
355da1eb | 10 | |
22891907 AE |
11 | #define XATTR_CEPH_PREFIX "ceph." |
12 | #define XATTR_CEPH_PREFIX_LEN (sizeof (XATTR_CEPH_PREFIX) - 1) | |
13 | ||
355da1eb SW |
14 | static bool ceph_is_valid_xattr(const char *name) |
15 | { | |
22891907 | 16 | return !strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN) || |
1a756278 | 17 | !strncmp(name, XATTR_SECURITY_PREFIX, |
355da1eb SW |
18 | XATTR_SECURITY_PREFIX_LEN) || |
19 | !strncmp(name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN) || | |
20 | !strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN); | |
21 | } | |
22 | ||
23 | /* | |
24 | * These define virtual xattrs exposing the recursive directory | |
25 | * statistics and layout metadata. | |
26 | */ | |
881a5fa2 | 27 | struct ceph_vxattr { |
355da1eb | 28 | char *name; |
3ce6cd12 | 29 | size_t name_size; /* strlen(name) + 1 (for '\0') */ |
355da1eb SW |
30 | size_t (*getxattr_cb)(struct ceph_inode_info *ci, char *val, |
31 | size_t size); | |
8860147a | 32 | bool readonly, hidden; |
f36e4472 | 33 | bool (*exists_cb)(struct ceph_inode_info *ci); |
355da1eb SW |
34 | }; |
35 | ||
32ab0bd7 SW |
36 | /* layouts */ |
37 | ||
38 | static bool ceph_vxattrcb_layout_exists(struct ceph_inode_info *ci) | |
39 | { | |
40 | size_t s; | |
41 | char *p = (char *)&ci->i_layout; | |
42 | ||
43 | for (s = 0; s < sizeof(ci->i_layout); s++, p++) | |
44 | if (*p) | |
45 | return true; | |
46 | return false; | |
47 | } | |
48 | ||
49 | static size_t ceph_vxattrcb_layout(struct ceph_inode_info *ci, char *val, | |
50 | size_t size) | |
51 | { | |
52 | int ret; | |
53 | struct ceph_fs_client *fsc = ceph_sb_to_client(ci->vfs_inode.i_sb); | |
54 | struct ceph_osd_client *osdc = &fsc->client->osdc; | |
55 | s64 pool = ceph_file_layout_pg_pool(ci->i_layout); | |
56 | const char *pool_name; | |
57 | ||
58 | dout("ceph_vxattrcb_layout %p\n", &ci->vfs_inode); | |
59 | down_read(&osdc->map_sem); | |
60 | pool_name = ceph_pg_pool_name_by_id(osdc->osdmap, pool); | |
61 | if (pool_name) | |
62 | ret = snprintf(val, size, | |
63 | "stripe_unit=%lld stripe_count=%lld object_size=%lld pool=%s", | |
64 | (unsigned long long)ceph_file_layout_su(ci->i_layout), | |
65 | (unsigned long long)ceph_file_layout_stripe_count(ci->i_layout), | |
66 | (unsigned long long)ceph_file_layout_object_size(ci->i_layout), | |
67 | pool_name); | |
68 | else | |
69 | ret = snprintf(val, size, | |
70 | "stripe_unit=%lld stripe_count=%lld object_size=%lld pool=%lld", | |
71 | (unsigned long long)ceph_file_layout_su(ci->i_layout), | |
72 | (unsigned long long)ceph_file_layout_stripe_count(ci->i_layout), | |
73 | (unsigned long long)ceph_file_layout_object_size(ci->i_layout), | |
74 | (unsigned long long)pool); | |
75 | ||
76 | up_read(&osdc->map_sem); | |
77 | return ret; | |
78 | } | |
79 | ||
355da1eb SW |
80 | /* directories */ |
81 | ||
aa4066ed | 82 | static size_t ceph_vxattrcb_dir_entries(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
83 | size_t size) |
84 | { | |
85 | return snprintf(val, size, "%lld", ci->i_files + ci->i_subdirs); | |
86 | } | |
87 | ||
aa4066ed | 88 | static size_t ceph_vxattrcb_dir_files(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
89 | size_t size) |
90 | { | |
91 | return snprintf(val, size, "%lld", ci->i_files); | |
92 | } | |
93 | ||
aa4066ed | 94 | static size_t ceph_vxattrcb_dir_subdirs(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
95 | size_t size) |
96 | { | |
97 | return snprintf(val, size, "%lld", ci->i_subdirs); | |
98 | } | |
99 | ||
aa4066ed | 100 | static size_t ceph_vxattrcb_dir_rentries(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
101 | size_t size) |
102 | { | |
103 | return snprintf(val, size, "%lld", ci->i_rfiles + ci->i_rsubdirs); | |
104 | } | |
105 | ||
aa4066ed | 106 | static size_t ceph_vxattrcb_dir_rfiles(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
107 | size_t size) |
108 | { | |
109 | return snprintf(val, size, "%lld", ci->i_rfiles); | |
110 | } | |
111 | ||
aa4066ed | 112 | static size_t ceph_vxattrcb_dir_rsubdirs(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
113 | size_t size) |
114 | { | |
115 | return snprintf(val, size, "%lld", ci->i_rsubdirs); | |
116 | } | |
117 | ||
aa4066ed | 118 | static size_t ceph_vxattrcb_dir_rbytes(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
119 | size_t size) |
120 | { | |
121 | return snprintf(val, size, "%lld", ci->i_rbytes); | |
122 | } | |
123 | ||
aa4066ed | 124 | static size_t ceph_vxattrcb_dir_rctime(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
125 | size_t size) |
126 | { | |
3489b42a | 127 | return snprintf(val, size, "%ld.09%ld", (long)ci->i_rctime.tv_sec, |
355da1eb SW |
128 | (long)ci->i_rctime.tv_nsec); |
129 | } | |
130 | ||
32ab0bd7 | 131 | |
eb788084 AE |
132 | #define CEPH_XATTR_NAME(_type, _name) XATTR_CEPH_PREFIX #_type "." #_name |
133 | ||
8860147a SW |
134 | #define XATTR_NAME_CEPH(_type, _name) \ |
135 | { \ | |
136 | .name = CEPH_XATTR_NAME(_type, _name), \ | |
137 | .name_size = sizeof (CEPH_XATTR_NAME(_type, _name)), \ | |
138 | .getxattr_cb = ceph_vxattrcb_ ## _type ## _ ## _name, \ | |
139 | .readonly = true, \ | |
140 | .hidden = false, \ | |
f36e4472 | 141 | .exists_cb = NULL, \ |
8860147a | 142 | } |
eb788084 | 143 | |
881a5fa2 | 144 | static struct ceph_vxattr ceph_dir_vxattrs[] = { |
eb788084 AE |
145 | XATTR_NAME_CEPH(dir, entries), |
146 | XATTR_NAME_CEPH(dir, files), | |
147 | XATTR_NAME_CEPH(dir, subdirs), | |
148 | XATTR_NAME_CEPH(dir, rentries), | |
149 | XATTR_NAME_CEPH(dir, rfiles), | |
150 | XATTR_NAME_CEPH(dir, rsubdirs), | |
151 | XATTR_NAME_CEPH(dir, rbytes), | |
152 | XATTR_NAME_CEPH(dir, rctime), | |
153 | { 0 } /* Required table terminator */ | |
355da1eb | 154 | }; |
3ce6cd12 | 155 | static size_t ceph_dir_vxattrs_name_size; /* total size of all names */ |
355da1eb SW |
156 | |
157 | /* files */ | |
158 | ||
881a5fa2 | 159 | static struct ceph_vxattr ceph_file_vxattrs[] = { |
32ab0bd7 SW |
160 | { |
161 | .name = "ceph.file.layout", | |
162 | .name_size = sizeof("ceph.file.layout"), | |
163 | .getxattr_cb = ceph_vxattrcb_layout, | |
164 | .readonly = false, | |
165 | .hidden = false, | |
166 | .exists_cb = ceph_vxattrcb_layout_exists, | |
167 | }, | |
eb788084 | 168 | { 0 } /* Required table terminator */ |
355da1eb | 169 | }; |
3ce6cd12 | 170 | static size_t ceph_file_vxattrs_name_size; /* total size of all names */ |
355da1eb | 171 | |
881a5fa2 | 172 | static struct ceph_vxattr *ceph_inode_vxattrs(struct inode *inode) |
355da1eb SW |
173 | { |
174 | if (S_ISDIR(inode->i_mode)) | |
175 | return ceph_dir_vxattrs; | |
176 | else if (S_ISREG(inode->i_mode)) | |
177 | return ceph_file_vxattrs; | |
178 | return NULL; | |
179 | } | |
180 | ||
3ce6cd12 AE |
181 | static size_t ceph_vxattrs_name_size(struct ceph_vxattr *vxattrs) |
182 | { | |
183 | if (vxattrs == ceph_dir_vxattrs) | |
184 | return ceph_dir_vxattrs_name_size; | |
185 | if (vxattrs == ceph_file_vxattrs) | |
186 | return ceph_file_vxattrs_name_size; | |
187 | BUG(); | |
188 | ||
189 | return 0; | |
190 | } | |
191 | ||
192 | /* | |
193 | * Compute the aggregate size (including terminating '\0') of all | |
194 | * virtual extended attribute names in the given vxattr table. | |
195 | */ | |
196 | static size_t __init vxattrs_name_size(struct ceph_vxattr *vxattrs) | |
197 | { | |
198 | struct ceph_vxattr *vxattr; | |
199 | size_t size = 0; | |
200 | ||
201 | for (vxattr = vxattrs; vxattr->name; vxattr++) | |
8860147a SW |
202 | if (!vxattr->hidden) |
203 | size += vxattr->name_size; | |
3ce6cd12 AE |
204 | |
205 | return size; | |
206 | } | |
207 | ||
208 | /* Routines called at initialization and exit time */ | |
209 | ||
210 | void __init ceph_xattr_init(void) | |
211 | { | |
212 | ceph_dir_vxattrs_name_size = vxattrs_name_size(ceph_dir_vxattrs); | |
213 | ceph_file_vxattrs_name_size = vxattrs_name_size(ceph_file_vxattrs); | |
214 | } | |
215 | ||
216 | void ceph_xattr_exit(void) | |
217 | { | |
218 | ceph_dir_vxattrs_name_size = 0; | |
219 | ceph_file_vxattrs_name_size = 0; | |
220 | } | |
221 | ||
881a5fa2 | 222 | static struct ceph_vxattr *ceph_match_vxattr(struct inode *inode, |
355da1eb SW |
223 | const char *name) |
224 | { | |
881a5fa2 | 225 | struct ceph_vxattr *vxattr = ceph_inode_vxattrs(inode); |
06476a69 AE |
226 | |
227 | if (vxattr) { | |
228 | while (vxattr->name) { | |
229 | if (!strcmp(vxattr->name, name)) | |
230 | return vxattr; | |
231 | vxattr++; | |
232 | } | |
233 | } | |
234 | ||
355da1eb SW |
235 | return NULL; |
236 | } | |
237 | ||
238 | static int __set_xattr(struct ceph_inode_info *ci, | |
239 | const char *name, int name_len, | |
240 | const char *val, int val_len, | |
241 | int dirty, | |
242 | int should_free_name, int should_free_val, | |
243 | struct ceph_inode_xattr **newxattr) | |
244 | { | |
245 | struct rb_node **p; | |
246 | struct rb_node *parent = NULL; | |
247 | struct ceph_inode_xattr *xattr = NULL; | |
248 | int c; | |
249 | int new = 0; | |
250 | ||
251 | p = &ci->i_xattrs.index.rb_node; | |
252 | while (*p) { | |
253 | parent = *p; | |
254 | xattr = rb_entry(parent, struct ceph_inode_xattr, node); | |
255 | c = strncmp(name, xattr->name, min(name_len, xattr->name_len)); | |
256 | if (c < 0) | |
257 | p = &(*p)->rb_left; | |
258 | else if (c > 0) | |
259 | p = &(*p)->rb_right; | |
260 | else { | |
261 | if (name_len == xattr->name_len) | |
262 | break; | |
263 | else if (name_len < xattr->name_len) | |
264 | p = &(*p)->rb_left; | |
265 | else | |
266 | p = &(*p)->rb_right; | |
267 | } | |
268 | xattr = NULL; | |
269 | } | |
270 | ||
271 | if (!xattr) { | |
272 | new = 1; | |
273 | xattr = *newxattr; | |
274 | xattr->name = name; | |
275 | xattr->name_len = name_len; | |
276 | xattr->should_free_name = should_free_name; | |
277 | ||
278 | ci->i_xattrs.count++; | |
279 | dout("__set_xattr count=%d\n", ci->i_xattrs.count); | |
280 | } else { | |
281 | kfree(*newxattr); | |
282 | *newxattr = NULL; | |
283 | if (xattr->should_free_val) | |
284 | kfree((void *)xattr->val); | |
285 | ||
286 | if (should_free_name) { | |
287 | kfree((void *)name); | |
288 | name = xattr->name; | |
289 | } | |
290 | ci->i_xattrs.names_size -= xattr->name_len; | |
291 | ci->i_xattrs.vals_size -= xattr->val_len; | |
292 | } | |
355da1eb SW |
293 | ci->i_xattrs.names_size += name_len; |
294 | ci->i_xattrs.vals_size += val_len; | |
295 | if (val) | |
296 | xattr->val = val; | |
297 | else | |
298 | xattr->val = ""; | |
299 | ||
300 | xattr->val_len = val_len; | |
301 | xattr->dirty = dirty; | |
302 | xattr->should_free_val = (val && should_free_val); | |
303 | ||
304 | if (new) { | |
305 | rb_link_node(&xattr->node, parent, p); | |
306 | rb_insert_color(&xattr->node, &ci->i_xattrs.index); | |
307 | dout("__set_xattr_val p=%p\n", p); | |
308 | } | |
309 | ||
310 | dout("__set_xattr_val added %llx.%llx xattr %p %s=%.*s\n", | |
311 | ceph_vinop(&ci->vfs_inode), xattr, name, val_len, val); | |
312 | ||
313 | return 0; | |
314 | } | |
315 | ||
316 | static struct ceph_inode_xattr *__get_xattr(struct ceph_inode_info *ci, | |
317 | const char *name) | |
318 | { | |
319 | struct rb_node **p; | |
320 | struct rb_node *parent = NULL; | |
321 | struct ceph_inode_xattr *xattr = NULL; | |
17db143f | 322 | int name_len = strlen(name); |
355da1eb SW |
323 | int c; |
324 | ||
325 | p = &ci->i_xattrs.index.rb_node; | |
326 | while (*p) { | |
327 | parent = *p; | |
328 | xattr = rb_entry(parent, struct ceph_inode_xattr, node); | |
329 | c = strncmp(name, xattr->name, xattr->name_len); | |
17db143f SW |
330 | if (c == 0 && name_len > xattr->name_len) |
331 | c = 1; | |
355da1eb SW |
332 | if (c < 0) |
333 | p = &(*p)->rb_left; | |
334 | else if (c > 0) | |
335 | p = &(*p)->rb_right; | |
336 | else { | |
337 | dout("__get_xattr %s: found %.*s\n", name, | |
338 | xattr->val_len, xattr->val); | |
339 | return xattr; | |
340 | } | |
341 | } | |
342 | ||
343 | dout("__get_xattr %s: not found\n", name); | |
344 | ||
345 | return NULL; | |
346 | } | |
347 | ||
348 | static void __free_xattr(struct ceph_inode_xattr *xattr) | |
349 | { | |
350 | BUG_ON(!xattr); | |
351 | ||
352 | if (xattr->should_free_name) | |
353 | kfree((void *)xattr->name); | |
354 | if (xattr->should_free_val) | |
355 | kfree((void *)xattr->val); | |
356 | ||
357 | kfree(xattr); | |
358 | } | |
359 | ||
360 | static int __remove_xattr(struct ceph_inode_info *ci, | |
361 | struct ceph_inode_xattr *xattr) | |
362 | { | |
363 | if (!xattr) | |
364 | return -EOPNOTSUPP; | |
365 | ||
366 | rb_erase(&xattr->node, &ci->i_xattrs.index); | |
367 | ||
368 | if (xattr->should_free_name) | |
369 | kfree((void *)xattr->name); | |
370 | if (xattr->should_free_val) | |
371 | kfree((void *)xattr->val); | |
372 | ||
373 | ci->i_xattrs.names_size -= xattr->name_len; | |
374 | ci->i_xattrs.vals_size -= xattr->val_len; | |
375 | ci->i_xattrs.count--; | |
376 | kfree(xattr); | |
377 | ||
378 | return 0; | |
379 | } | |
380 | ||
381 | static int __remove_xattr_by_name(struct ceph_inode_info *ci, | |
382 | const char *name) | |
383 | { | |
384 | struct rb_node **p; | |
385 | struct ceph_inode_xattr *xattr; | |
386 | int err; | |
387 | ||
388 | p = &ci->i_xattrs.index.rb_node; | |
389 | xattr = __get_xattr(ci, name); | |
390 | err = __remove_xattr(ci, xattr); | |
391 | return err; | |
392 | } | |
393 | ||
394 | static char *__copy_xattr_names(struct ceph_inode_info *ci, | |
395 | char *dest) | |
396 | { | |
397 | struct rb_node *p; | |
398 | struct ceph_inode_xattr *xattr = NULL; | |
399 | ||
400 | p = rb_first(&ci->i_xattrs.index); | |
401 | dout("__copy_xattr_names count=%d\n", ci->i_xattrs.count); | |
402 | ||
403 | while (p) { | |
404 | xattr = rb_entry(p, struct ceph_inode_xattr, node); | |
405 | memcpy(dest, xattr->name, xattr->name_len); | |
406 | dest[xattr->name_len] = '\0'; | |
407 | ||
408 | dout("dest=%s %p (%s) (%d/%d)\n", dest, xattr, xattr->name, | |
409 | xattr->name_len, ci->i_xattrs.names_size); | |
410 | ||
411 | dest += xattr->name_len + 1; | |
412 | p = rb_next(p); | |
413 | } | |
414 | ||
415 | return dest; | |
416 | } | |
417 | ||
418 | void __ceph_destroy_xattrs(struct ceph_inode_info *ci) | |
419 | { | |
420 | struct rb_node *p, *tmp; | |
421 | struct ceph_inode_xattr *xattr = NULL; | |
422 | ||
423 | p = rb_first(&ci->i_xattrs.index); | |
424 | ||
425 | dout("__ceph_destroy_xattrs p=%p\n", p); | |
426 | ||
427 | while (p) { | |
428 | xattr = rb_entry(p, struct ceph_inode_xattr, node); | |
429 | tmp = p; | |
430 | p = rb_next(tmp); | |
431 | dout("__ceph_destroy_xattrs next p=%p (%.*s)\n", p, | |
432 | xattr->name_len, xattr->name); | |
433 | rb_erase(tmp, &ci->i_xattrs.index); | |
434 | ||
435 | __free_xattr(xattr); | |
436 | } | |
437 | ||
438 | ci->i_xattrs.names_size = 0; | |
439 | ci->i_xattrs.vals_size = 0; | |
440 | ci->i_xattrs.index_version = 0; | |
441 | ci->i_xattrs.count = 0; | |
442 | ci->i_xattrs.index = RB_ROOT; | |
443 | } | |
444 | ||
445 | static int __build_xattrs(struct inode *inode) | |
be655596 SW |
446 | __releases(ci->i_ceph_lock) |
447 | __acquires(ci->i_ceph_lock) | |
355da1eb SW |
448 | { |
449 | u32 namelen; | |
450 | u32 numattr = 0; | |
451 | void *p, *end; | |
452 | u32 len; | |
453 | const char *name, *val; | |
454 | struct ceph_inode_info *ci = ceph_inode(inode); | |
455 | int xattr_version; | |
456 | struct ceph_inode_xattr **xattrs = NULL; | |
63ff78b2 | 457 | int err = 0; |
355da1eb SW |
458 | int i; |
459 | ||
460 | dout("__build_xattrs() len=%d\n", | |
461 | ci->i_xattrs.blob ? (int)ci->i_xattrs.blob->vec.iov_len : 0); | |
462 | ||
463 | if (ci->i_xattrs.index_version >= ci->i_xattrs.version) | |
464 | return 0; /* already built */ | |
465 | ||
466 | __ceph_destroy_xattrs(ci); | |
467 | ||
468 | start: | |
469 | /* updated internal xattr rb tree */ | |
470 | if (ci->i_xattrs.blob && ci->i_xattrs.blob->vec.iov_len > 4) { | |
471 | p = ci->i_xattrs.blob->vec.iov_base; | |
472 | end = p + ci->i_xattrs.blob->vec.iov_len; | |
473 | ceph_decode_32_safe(&p, end, numattr, bad); | |
474 | xattr_version = ci->i_xattrs.version; | |
be655596 | 475 | spin_unlock(&ci->i_ceph_lock); |
355da1eb SW |
476 | |
477 | xattrs = kcalloc(numattr, sizeof(struct ceph_xattr *), | |
478 | GFP_NOFS); | |
479 | err = -ENOMEM; | |
480 | if (!xattrs) | |
481 | goto bad_lock; | |
482 | memset(xattrs, 0, numattr*sizeof(struct ceph_xattr *)); | |
483 | for (i = 0; i < numattr; i++) { | |
484 | xattrs[i] = kmalloc(sizeof(struct ceph_inode_xattr), | |
485 | GFP_NOFS); | |
486 | if (!xattrs[i]) | |
487 | goto bad_lock; | |
488 | } | |
489 | ||
be655596 | 490 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
491 | if (ci->i_xattrs.version != xattr_version) { |
492 | /* lost a race, retry */ | |
493 | for (i = 0; i < numattr; i++) | |
494 | kfree(xattrs[i]); | |
495 | kfree(xattrs); | |
21ec6ffa | 496 | xattrs = NULL; |
355da1eb SW |
497 | goto start; |
498 | } | |
499 | err = -EIO; | |
500 | while (numattr--) { | |
501 | ceph_decode_32_safe(&p, end, len, bad); | |
502 | namelen = len; | |
503 | name = p; | |
504 | p += len; | |
505 | ceph_decode_32_safe(&p, end, len, bad); | |
506 | val = p; | |
507 | p += len; | |
508 | ||
509 | err = __set_xattr(ci, name, namelen, val, len, | |
510 | 0, 0, 0, &xattrs[numattr]); | |
511 | ||
512 | if (err < 0) | |
513 | goto bad; | |
514 | } | |
515 | kfree(xattrs); | |
516 | } | |
517 | ci->i_xattrs.index_version = ci->i_xattrs.version; | |
518 | ci->i_xattrs.dirty = false; | |
519 | ||
520 | return err; | |
521 | bad_lock: | |
be655596 | 522 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
523 | bad: |
524 | if (xattrs) { | |
525 | for (i = 0; i < numattr; i++) | |
526 | kfree(xattrs[i]); | |
527 | kfree(xattrs); | |
528 | } | |
529 | ci->i_xattrs.names_size = 0; | |
530 | return err; | |
531 | } | |
532 | ||
533 | static int __get_required_blob_size(struct ceph_inode_info *ci, int name_size, | |
534 | int val_size) | |
535 | { | |
536 | /* | |
537 | * 4 bytes for the length, and additional 4 bytes per each xattr name, | |
538 | * 4 bytes per each value | |
539 | */ | |
540 | int size = 4 + ci->i_xattrs.count*(4 + 4) + | |
541 | ci->i_xattrs.names_size + | |
542 | ci->i_xattrs.vals_size; | |
543 | dout("__get_required_blob_size c=%d names.size=%d vals.size=%d\n", | |
544 | ci->i_xattrs.count, ci->i_xattrs.names_size, | |
545 | ci->i_xattrs.vals_size); | |
546 | ||
547 | if (name_size) | |
548 | size += 4 + 4 + name_size + val_size; | |
549 | ||
550 | return size; | |
551 | } | |
552 | ||
553 | /* | |
554 | * If there are dirty xattrs, reencode xattrs into the prealloc_blob | |
555 | * and swap into place. | |
556 | */ | |
557 | void __ceph_build_xattrs_blob(struct ceph_inode_info *ci) | |
558 | { | |
559 | struct rb_node *p; | |
560 | struct ceph_inode_xattr *xattr = NULL; | |
561 | void *dest; | |
562 | ||
563 | dout("__build_xattrs_blob %p\n", &ci->vfs_inode); | |
564 | if (ci->i_xattrs.dirty) { | |
565 | int need = __get_required_blob_size(ci, 0, 0); | |
566 | ||
567 | BUG_ON(need > ci->i_xattrs.prealloc_blob->alloc_len); | |
568 | ||
569 | p = rb_first(&ci->i_xattrs.index); | |
570 | dest = ci->i_xattrs.prealloc_blob->vec.iov_base; | |
571 | ||
572 | ceph_encode_32(&dest, ci->i_xattrs.count); | |
573 | while (p) { | |
574 | xattr = rb_entry(p, struct ceph_inode_xattr, node); | |
575 | ||
576 | ceph_encode_32(&dest, xattr->name_len); | |
577 | memcpy(dest, xattr->name, xattr->name_len); | |
578 | dest += xattr->name_len; | |
579 | ceph_encode_32(&dest, xattr->val_len); | |
580 | memcpy(dest, xattr->val, xattr->val_len); | |
581 | dest += xattr->val_len; | |
582 | ||
583 | p = rb_next(p); | |
584 | } | |
585 | ||
586 | /* adjust buffer len; it may be larger than we need */ | |
587 | ci->i_xattrs.prealloc_blob->vec.iov_len = | |
588 | dest - ci->i_xattrs.prealloc_blob->vec.iov_base; | |
589 | ||
b6c1d5b8 SW |
590 | if (ci->i_xattrs.blob) |
591 | ceph_buffer_put(ci->i_xattrs.blob); | |
355da1eb SW |
592 | ci->i_xattrs.blob = ci->i_xattrs.prealloc_blob; |
593 | ci->i_xattrs.prealloc_blob = NULL; | |
594 | ci->i_xattrs.dirty = false; | |
4a625be4 | 595 | ci->i_xattrs.version++; |
355da1eb SW |
596 | } |
597 | } | |
598 | ||
599 | ssize_t ceph_getxattr(struct dentry *dentry, const char *name, void *value, | |
600 | size_t size) | |
601 | { | |
602 | struct inode *inode = dentry->d_inode; | |
603 | struct ceph_inode_info *ci = ceph_inode(inode); | |
355da1eb SW |
604 | int err; |
605 | struct ceph_inode_xattr *xattr; | |
881a5fa2 | 606 | struct ceph_vxattr *vxattr = NULL; |
355da1eb SW |
607 | |
608 | if (!ceph_is_valid_xattr(name)) | |
609 | return -ENODATA; | |
610 | ||
be655596 | 611 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
612 | dout("getxattr %p ver=%lld index_ver=%lld\n", inode, |
613 | ci->i_xattrs.version, ci->i_xattrs.index_version); | |
614 | ||
0bee82fb SW |
615 | /* let's see if a virtual xattr was requested */ |
616 | vxattr = ceph_match_vxattr(inode, name); | |
617 | if (vxattr && !(vxattr->exists_cb && !vxattr->exists_cb(ci))) { | |
618 | err = vxattr->getxattr_cb(ci, value, size); | |
619 | goto out; | |
620 | } | |
621 | ||
355da1eb SW |
622 | if (__ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 1) && |
623 | (ci->i_xattrs.index_version >= ci->i_xattrs.version)) { | |
624 | goto get_xattr; | |
625 | } else { | |
be655596 | 626 | spin_unlock(&ci->i_ceph_lock); |
355da1eb SW |
627 | /* get xattrs from mds (if we don't already have them) */ |
628 | err = ceph_do_getattr(inode, CEPH_STAT_CAP_XATTR); | |
629 | if (err) | |
630 | return err; | |
631 | } | |
632 | ||
be655596 | 633 | spin_lock(&ci->i_ceph_lock); |
355da1eb | 634 | |
355da1eb SW |
635 | err = __build_xattrs(inode); |
636 | if (err < 0) | |
637 | goto out; | |
638 | ||
639 | get_xattr: | |
640 | err = -ENODATA; /* == ENOATTR */ | |
641 | xattr = __get_xattr(ci, name); | |
0bee82fb | 642 | if (!xattr) |
355da1eb | 643 | goto out; |
355da1eb SW |
644 | |
645 | err = -ERANGE; | |
646 | if (size && size < xattr->val_len) | |
647 | goto out; | |
648 | ||
649 | err = xattr->val_len; | |
650 | if (size == 0) | |
651 | goto out; | |
652 | ||
653 | memcpy(value, xattr->val, xattr->val_len); | |
654 | ||
655 | out: | |
be655596 | 656 | spin_unlock(&ci->i_ceph_lock); |
355da1eb SW |
657 | return err; |
658 | } | |
659 | ||
660 | ssize_t ceph_listxattr(struct dentry *dentry, char *names, size_t size) | |
661 | { | |
662 | struct inode *inode = dentry->d_inode; | |
663 | struct ceph_inode_info *ci = ceph_inode(inode); | |
881a5fa2 | 664 | struct ceph_vxattr *vxattrs = ceph_inode_vxattrs(inode); |
355da1eb SW |
665 | u32 vir_namelen = 0; |
666 | u32 namelen; | |
667 | int err; | |
668 | u32 len; | |
669 | int i; | |
670 | ||
be655596 | 671 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
672 | dout("listxattr %p ver=%lld index_ver=%lld\n", inode, |
673 | ci->i_xattrs.version, ci->i_xattrs.index_version); | |
674 | ||
675 | if (__ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 1) && | |
bddfa3cc | 676 | (ci->i_xattrs.index_version >= ci->i_xattrs.version)) { |
355da1eb SW |
677 | goto list_xattr; |
678 | } else { | |
be655596 | 679 | spin_unlock(&ci->i_ceph_lock); |
355da1eb SW |
680 | err = ceph_do_getattr(inode, CEPH_STAT_CAP_XATTR); |
681 | if (err) | |
682 | return err; | |
683 | } | |
684 | ||
be655596 | 685 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
686 | |
687 | err = __build_xattrs(inode); | |
688 | if (err < 0) | |
689 | goto out; | |
690 | ||
691 | list_xattr: | |
3ce6cd12 AE |
692 | /* |
693 | * Start with virtual dir xattr names (if any) (including | |
694 | * terminating '\0' characters for each). | |
695 | */ | |
696 | vir_namelen = ceph_vxattrs_name_size(vxattrs); | |
697 | ||
355da1eb | 698 | /* adding 1 byte per each variable due to the null termination */ |
b65917dd | 699 | namelen = ci->i_xattrs.names_size + ci->i_xattrs.count; |
355da1eb | 700 | err = -ERANGE; |
b65917dd | 701 | if (size && vir_namelen + namelen > size) |
355da1eb SW |
702 | goto out; |
703 | ||
b65917dd | 704 | err = namelen + vir_namelen; |
355da1eb SW |
705 | if (size == 0) |
706 | goto out; | |
707 | ||
708 | names = __copy_xattr_names(ci, names); | |
709 | ||
710 | /* virtual xattr names, too */ | |
b65917dd SW |
711 | err = namelen; |
712 | if (vxattrs) { | |
355da1eb | 713 | for (i = 0; vxattrs[i].name; i++) { |
b65917dd SW |
714 | if (!vxattrs[i].hidden && |
715 | !(vxattrs[i].exists_cb && | |
716 | !vxattrs[i].exists_cb(ci))) { | |
717 | len = sprintf(names, "%s", vxattrs[i].name); | |
718 | names += len + 1; | |
719 | err += len + 1; | |
720 | } | |
355da1eb | 721 | } |
b65917dd | 722 | } |
355da1eb SW |
723 | |
724 | out: | |
be655596 | 725 | spin_unlock(&ci->i_ceph_lock); |
355da1eb SW |
726 | return err; |
727 | } | |
728 | ||
729 | static int ceph_sync_setxattr(struct dentry *dentry, const char *name, | |
730 | const char *value, size_t size, int flags) | |
731 | { | |
3d14c5d2 | 732 | struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb); |
355da1eb SW |
733 | struct inode *inode = dentry->d_inode; |
734 | struct ceph_inode_info *ci = ceph_inode(inode); | |
5f21c96d | 735 | struct inode *parent_inode; |
355da1eb | 736 | struct ceph_mds_request *req; |
3d14c5d2 | 737 | struct ceph_mds_client *mdsc = fsc->mdsc; |
355da1eb SW |
738 | int err; |
739 | int i, nr_pages; | |
740 | struct page **pages = NULL; | |
741 | void *kaddr; | |
742 | ||
743 | /* copy value into some pages */ | |
744 | nr_pages = calc_pages_for(0, size); | |
745 | if (nr_pages) { | |
746 | pages = kmalloc(sizeof(pages[0])*nr_pages, GFP_NOFS); | |
747 | if (!pages) | |
748 | return -ENOMEM; | |
749 | err = -ENOMEM; | |
750 | for (i = 0; i < nr_pages; i++) { | |
31459fe4 | 751 | pages[i] = __page_cache_alloc(GFP_NOFS); |
355da1eb SW |
752 | if (!pages[i]) { |
753 | nr_pages = i; | |
754 | goto out; | |
755 | } | |
756 | kaddr = kmap(pages[i]); | |
757 | memcpy(kaddr, value + i*PAGE_CACHE_SIZE, | |
758 | min(PAGE_CACHE_SIZE, size-i*PAGE_CACHE_SIZE)); | |
759 | } | |
760 | } | |
761 | ||
762 | dout("setxattr value=%.*s\n", (int)size, value); | |
763 | ||
764 | /* do request */ | |
765 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETXATTR, | |
766 | USE_AUTH_MDS); | |
60d87733 JL |
767 | if (IS_ERR(req)) { |
768 | err = PTR_ERR(req); | |
769 | goto out; | |
770 | } | |
70b666c3 SW |
771 | req->r_inode = inode; |
772 | ihold(inode); | |
355da1eb SW |
773 | req->r_inode_drop = CEPH_CAP_XATTR_SHARED; |
774 | req->r_num_caps = 1; | |
775 | req->r_args.setxattr.flags = cpu_to_le32(flags); | |
776 | req->r_path2 = kstrdup(name, GFP_NOFS); | |
777 | ||
778 | req->r_pages = pages; | |
779 | req->r_num_pages = nr_pages; | |
780 | req->r_data_len = size; | |
781 | ||
782 | dout("xattr.ver (before): %lld\n", ci->i_xattrs.version); | |
5f21c96d | 783 | parent_inode = ceph_get_dentry_parent_inode(dentry); |
355da1eb | 784 | err = ceph_mdsc_do_request(mdsc, parent_inode, req); |
5f21c96d | 785 | iput(parent_inode); |
355da1eb SW |
786 | ceph_mdsc_put_request(req); |
787 | dout("xattr.ver (after): %lld\n", ci->i_xattrs.version); | |
788 | ||
789 | out: | |
790 | if (pages) { | |
791 | for (i = 0; i < nr_pages; i++) | |
792 | __free_page(pages[i]); | |
793 | kfree(pages); | |
794 | } | |
795 | return err; | |
796 | } | |
797 | ||
798 | int ceph_setxattr(struct dentry *dentry, const char *name, | |
799 | const void *value, size_t size, int flags) | |
800 | { | |
801 | struct inode *inode = dentry->d_inode; | |
881a5fa2 | 802 | struct ceph_vxattr *vxattr; |
355da1eb | 803 | struct ceph_inode_info *ci = ceph_inode(inode); |
18fa8b3f | 804 | int issued; |
355da1eb | 805 | int err; |
18fa8b3f | 806 | int dirty; |
355da1eb SW |
807 | int name_len = strlen(name); |
808 | int val_len = size; | |
809 | char *newname = NULL; | |
810 | char *newval = NULL; | |
811 | struct ceph_inode_xattr *xattr = NULL; | |
355da1eb SW |
812 | int required_blob_size; |
813 | ||
814 | if (ceph_snap(inode) != CEPH_NOSNAP) | |
815 | return -EROFS; | |
816 | ||
817 | if (!ceph_is_valid_xattr(name)) | |
818 | return -EOPNOTSUPP; | |
819 | ||
06476a69 AE |
820 | vxattr = ceph_match_vxattr(inode, name); |
821 | if (vxattr && vxattr->readonly) | |
822 | return -EOPNOTSUPP; | |
355da1eb | 823 | |
3adf654d SW |
824 | /* pass any unhandled ceph.* xattrs through to the MDS */ |
825 | if (!strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN)) | |
826 | goto do_sync_unlocked; | |
827 | ||
355da1eb SW |
828 | /* preallocate memory for xattr name, value, index node */ |
829 | err = -ENOMEM; | |
61413c2f | 830 | newname = kmemdup(name, name_len + 1, GFP_NOFS); |
355da1eb SW |
831 | if (!newname) |
832 | goto out; | |
355da1eb SW |
833 | |
834 | if (val_len) { | |
b829c195 | 835 | newval = kmemdup(value, val_len, GFP_NOFS); |
355da1eb SW |
836 | if (!newval) |
837 | goto out; | |
355da1eb SW |
838 | } |
839 | ||
840 | xattr = kmalloc(sizeof(struct ceph_inode_xattr), GFP_NOFS); | |
841 | if (!xattr) | |
842 | goto out; | |
843 | ||
be655596 | 844 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
845 | retry: |
846 | issued = __ceph_caps_issued(ci, NULL); | |
18fa8b3f | 847 | dout("setxattr %p issued %s\n", inode, ceph_cap_string(issued)); |
355da1eb SW |
848 | if (!(issued & CEPH_CAP_XATTR_EXCL)) |
849 | goto do_sync; | |
850 | __build_xattrs(inode); | |
851 | ||
852 | required_blob_size = __get_required_blob_size(ci, name_len, val_len); | |
853 | ||
854 | if (!ci->i_xattrs.prealloc_blob || | |
855 | required_blob_size > ci->i_xattrs.prealloc_blob->alloc_len) { | |
18fa8b3f | 856 | struct ceph_buffer *blob; |
355da1eb | 857 | |
be655596 | 858 | spin_unlock(&ci->i_ceph_lock); |
355da1eb | 859 | dout(" preaallocating new blob size=%d\n", required_blob_size); |
b6c1d5b8 | 860 | blob = ceph_buffer_new(required_blob_size, GFP_NOFS); |
355da1eb SW |
861 | if (!blob) |
862 | goto out; | |
be655596 | 863 | spin_lock(&ci->i_ceph_lock); |
b6c1d5b8 SW |
864 | if (ci->i_xattrs.prealloc_blob) |
865 | ceph_buffer_put(ci->i_xattrs.prealloc_blob); | |
355da1eb SW |
866 | ci->i_xattrs.prealloc_blob = blob; |
867 | goto retry; | |
868 | } | |
869 | ||
355da1eb SW |
870 | err = __set_xattr(ci, newname, name_len, newval, |
871 | val_len, 1, 1, 1, &xattr); | |
18fa8b3f | 872 | |
fca65b4a | 873 | dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_XATTR_EXCL); |
355da1eb SW |
874 | ci->i_xattrs.dirty = true; |
875 | inode->i_ctime = CURRENT_TIME; | |
18fa8b3f | 876 | |
be655596 | 877 | spin_unlock(&ci->i_ceph_lock); |
fca65b4a SW |
878 | if (dirty) |
879 | __mark_inode_dirty(inode, dirty); | |
355da1eb SW |
880 | return err; |
881 | ||
882 | do_sync: | |
be655596 | 883 | spin_unlock(&ci->i_ceph_lock); |
3adf654d | 884 | do_sync_unlocked: |
355da1eb SW |
885 | err = ceph_sync_setxattr(dentry, name, value, size, flags); |
886 | out: | |
887 | kfree(newname); | |
888 | kfree(newval); | |
889 | kfree(xattr); | |
890 | return err; | |
891 | } | |
892 | ||
893 | static int ceph_send_removexattr(struct dentry *dentry, const char *name) | |
894 | { | |
3d14c5d2 YS |
895 | struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb); |
896 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
355da1eb | 897 | struct inode *inode = dentry->d_inode; |
5f21c96d | 898 | struct inode *parent_inode; |
355da1eb SW |
899 | struct ceph_mds_request *req; |
900 | int err; | |
901 | ||
902 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_RMXATTR, | |
903 | USE_AUTH_MDS); | |
904 | if (IS_ERR(req)) | |
905 | return PTR_ERR(req); | |
70b666c3 SW |
906 | req->r_inode = inode; |
907 | ihold(inode); | |
355da1eb SW |
908 | req->r_inode_drop = CEPH_CAP_XATTR_SHARED; |
909 | req->r_num_caps = 1; | |
910 | req->r_path2 = kstrdup(name, GFP_NOFS); | |
911 | ||
5f21c96d | 912 | parent_inode = ceph_get_dentry_parent_inode(dentry); |
355da1eb | 913 | err = ceph_mdsc_do_request(mdsc, parent_inode, req); |
5f21c96d | 914 | iput(parent_inode); |
355da1eb SW |
915 | ceph_mdsc_put_request(req); |
916 | return err; | |
917 | } | |
918 | ||
919 | int ceph_removexattr(struct dentry *dentry, const char *name) | |
920 | { | |
921 | struct inode *inode = dentry->d_inode; | |
881a5fa2 | 922 | struct ceph_vxattr *vxattr; |
355da1eb | 923 | struct ceph_inode_info *ci = ceph_inode(inode); |
355da1eb SW |
924 | int issued; |
925 | int err; | |
83eb26af | 926 | int required_blob_size; |
fca65b4a | 927 | int dirty; |
355da1eb SW |
928 | |
929 | if (ceph_snap(inode) != CEPH_NOSNAP) | |
930 | return -EROFS; | |
931 | ||
932 | if (!ceph_is_valid_xattr(name)) | |
933 | return -EOPNOTSUPP; | |
934 | ||
06476a69 AE |
935 | vxattr = ceph_match_vxattr(inode, name); |
936 | if (vxattr && vxattr->readonly) | |
937 | return -EOPNOTSUPP; | |
355da1eb | 938 | |
d421acb1 SW |
939 | /* pass any unhandled ceph.* xattrs through to the MDS */ |
940 | if (!strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN)) | |
941 | goto do_sync_unlocked; | |
942 | ||
83eb26af | 943 | err = -ENOMEM; |
be655596 | 944 | spin_lock(&ci->i_ceph_lock); |
83eb26af | 945 | retry: |
355da1eb SW |
946 | issued = __ceph_caps_issued(ci, NULL); |
947 | dout("removexattr %p issued %s\n", inode, ceph_cap_string(issued)); | |
948 | ||
949 | if (!(issued & CEPH_CAP_XATTR_EXCL)) | |
950 | goto do_sync; | |
18fa8b3f | 951 | __build_xattrs(inode); |
355da1eb | 952 | |
83eb26af AE |
953 | required_blob_size = __get_required_blob_size(ci, 0, 0); |
954 | ||
955 | if (!ci->i_xattrs.prealloc_blob || | |
956 | required_blob_size > ci->i_xattrs.prealloc_blob->alloc_len) { | |
957 | struct ceph_buffer *blob; | |
958 | ||
959 | spin_unlock(&ci->i_ceph_lock); | |
960 | dout(" preaallocating new blob size=%d\n", required_blob_size); | |
961 | blob = ceph_buffer_new(required_blob_size, GFP_NOFS); | |
962 | if (!blob) | |
963 | goto out; | |
964 | spin_lock(&ci->i_ceph_lock); | |
965 | if (ci->i_xattrs.prealloc_blob) | |
966 | ceph_buffer_put(ci->i_xattrs.prealloc_blob); | |
967 | ci->i_xattrs.prealloc_blob = blob; | |
968 | goto retry; | |
969 | } | |
970 | ||
355da1eb | 971 | err = __remove_xattr_by_name(ceph_inode(inode), name); |
18fa8b3f | 972 | |
fca65b4a | 973 | dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_XATTR_EXCL); |
355da1eb SW |
974 | ci->i_xattrs.dirty = true; |
975 | inode->i_ctime = CURRENT_TIME; | |
be655596 | 976 | spin_unlock(&ci->i_ceph_lock); |
fca65b4a SW |
977 | if (dirty) |
978 | __mark_inode_dirty(inode, dirty); | |
355da1eb SW |
979 | return err; |
980 | do_sync: | |
be655596 | 981 | spin_unlock(&ci->i_ceph_lock); |
d421acb1 | 982 | do_sync_unlocked: |
355da1eb | 983 | err = ceph_send_removexattr(dentry, name); |
83eb26af | 984 | out: |
355da1eb SW |
985 | return err; |
986 | } | |
987 |