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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 SW |
10 | |
11 | static bool ceph_is_valid_xattr(const char *name) | |
12 | { | |
1a756278 SW |
13 | return !strncmp(name, "ceph.", 5) || |
14 | !strncmp(name, XATTR_SECURITY_PREFIX, | |
355da1eb SW |
15 | XATTR_SECURITY_PREFIX_LEN) || |
16 | !strncmp(name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN) || | |
17 | !strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN); | |
18 | } | |
19 | ||
20 | /* | |
21 | * These define virtual xattrs exposing the recursive directory | |
22 | * statistics and layout metadata. | |
23 | */ | |
24 | struct ceph_vxattr_cb { | |
25 | bool readonly; | |
26 | char *name; | |
27 | size_t (*getxattr_cb)(struct ceph_inode_info *ci, char *val, | |
28 | size_t size); | |
29 | }; | |
30 | ||
31 | /* directories */ | |
32 | ||
33 | static size_t ceph_vxattrcb_entries(struct ceph_inode_info *ci, char *val, | |
34 | size_t size) | |
35 | { | |
36 | return snprintf(val, size, "%lld", ci->i_files + ci->i_subdirs); | |
37 | } | |
38 | ||
39 | static size_t ceph_vxattrcb_files(struct ceph_inode_info *ci, char *val, | |
40 | size_t size) | |
41 | { | |
42 | return snprintf(val, size, "%lld", ci->i_files); | |
43 | } | |
44 | ||
45 | static size_t ceph_vxattrcb_subdirs(struct ceph_inode_info *ci, char *val, | |
46 | size_t size) | |
47 | { | |
48 | return snprintf(val, size, "%lld", ci->i_subdirs); | |
49 | } | |
50 | ||
51 | static size_t ceph_vxattrcb_rentries(struct ceph_inode_info *ci, char *val, | |
52 | size_t size) | |
53 | { | |
54 | return snprintf(val, size, "%lld", ci->i_rfiles + ci->i_rsubdirs); | |
55 | } | |
56 | ||
57 | static size_t ceph_vxattrcb_rfiles(struct ceph_inode_info *ci, char *val, | |
58 | size_t size) | |
59 | { | |
60 | return snprintf(val, size, "%lld", ci->i_rfiles); | |
61 | } | |
62 | ||
63 | static size_t ceph_vxattrcb_rsubdirs(struct ceph_inode_info *ci, char *val, | |
64 | size_t size) | |
65 | { | |
66 | return snprintf(val, size, "%lld", ci->i_rsubdirs); | |
67 | } | |
68 | ||
69 | static size_t ceph_vxattrcb_rbytes(struct ceph_inode_info *ci, char *val, | |
70 | size_t size) | |
71 | { | |
72 | return snprintf(val, size, "%lld", ci->i_rbytes); | |
73 | } | |
74 | ||
75 | static size_t ceph_vxattrcb_rctime(struct ceph_inode_info *ci, char *val, | |
76 | size_t size) | |
77 | { | |
78 | return snprintf(val, size, "%ld.%ld", (long)ci->i_rctime.tv_sec, | |
79 | (long)ci->i_rctime.tv_nsec); | |
80 | } | |
81 | ||
82 | static struct ceph_vxattr_cb ceph_dir_vxattrs[] = { | |
1a756278 SW |
83 | { true, "ceph.dir.entries", ceph_vxattrcb_entries}, |
84 | { true, "ceph.dir.files", ceph_vxattrcb_files}, | |
85 | { true, "ceph.dir.subdirs", ceph_vxattrcb_subdirs}, | |
86 | { true, "ceph.dir.rentries", ceph_vxattrcb_rentries}, | |
87 | { true, "ceph.dir.rfiles", ceph_vxattrcb_rfiles}, | |
88 | { true, "ceph.dir.rsubdirs", ceph_vxattrcb_rsubdirs}, | |
89 | { true, "ceph.dir.rbytes", ceph_vxattrcb_rbytes}, | |
90 | { true, "ceph.dir.rctime", ceph_vxattrcb_rctime}, | |
355da1eb SW |
91 | { true, NULL, NULL } |
92 | }; | |
93 | ||
94 | /* files */ | |
95 | ||
96 | static size_t ceph_vxattrcb_layout(struct ceph_inode_info *ci, char *val, | |
97 | size_t size) | |
98 | { | |
b195befd SW |
99 | int ret; |
100 | ||
101 | ret = snprintf(val, size, | |
355da1eb SW |
102 | "chunk_bytes=%lld\nstripe_count=%lld\nobject_size=%lld\n", |
103 | (unsigned long long)ceph_file_layout_su(ci->i_layout), | |
104 | (unsigned long long)ceph_file_layout_stripe_count(ci->i_layout), | |
105 | (unsigned long long)ceph_file_layout_object_size(ci->i_layout)); | |
b195befd SW |
106 | if (ceph_file_layout_pg_preferred(ci->i_layout)) |
107 | ret += snprintf(val + ret, size, "preferred_osd=%lld\n", | |
108 | (unsigned long long)ceph_file_layout_pg_preferred( | |
109 | ci->i_layout)); | |
110 | return ret; | |
355da1eb SW |
111 | } |
112 | ||
113 | static struct ceph_vxattr_cb ceph_file_vxattrs[] = { | |
114fc474 AE |
114 | { true, "ceph.file.layout", ceph_vxattrcb_layout}, |
115 | /* The following extended attribute name is deprecated */ | |
1a756278 | 116 | { true, "ceph.layout", ceph_vxattrcb_layout}, |
114fc474 | 117 | { true, NULL, NULL } |
355da1eb SW |
118 | }; |
119 | ||
120 | static struct ceph_vxattr_cb *ceph_inode_vxattrs(struct inode *inode) | |
121 | { | |
122 | if (S_ISDIR(inode->i_mode)) | |
123 | return ceph_dir_vxattrs; | |
124 | else if (S_ISREG(inode->i_mode)) | |
125 | return ceph_file_vxattrs; | |
126 | return NULL; | |
127 | } | |
128 | ||
129 | static struct ceph_vxattr_cb *ceph_match_vxattr(struct ceph_vxattr_cb *vxattr, | |
130 | const char *name) | |
131 | { | |
132 | do { | |
133 | if (strcmp(vxattr->name, name) == 0) | |
134 | return vxattr; | |
135 | vxattr++; | |
136 | } while (vxattr->name); | |
137 | return NULL; | |
138 | } | |
139 | ||
140 | static int __set_xattr(struct ceph_inode_info *ci, | |
141 | const char *name, int name_len, | |
142 | const char *val, int val_len, | |
143 | int dirty, | |
144 | int should_free_name, int should_free_val, | |
145 | struct ceph_inode_xattr **newxattr) | |
146 | { | |
147 | struct rb_node **p; | |
148 | struct rb_node *parent = NULL; | |
149 | struct ceph_inode_xattr *xattr = NULL; | |
150 | int c; | |
151 | int new = 0; | |
152 | ||
153 | p = &ci->i_xattrs.index.rb_node; | |
154 | while (*p) { | |
155 | parent = *p; | |
156 | xattr = rb_entry(parent, struct ceph_inode_xattr, node); | |
157 | c = strncmp(name, xattr->name, min(name_len, xattr->name_len)); | |
158 | if (c < 0) | |
159 | p = &(*p)->rb_left; | |
160 | else if (c > 0) | |
161 | p = &(*p)->rb_right; | |
162 | else { | |
163 | if (name_len == xattr->name_len) | |
164 | break; | |
165 | else if (name_len < xattr->name_len) | |
166 | p = &(*p)->rb_left; | |
167 | else | |
168 | p = &(*p)->rb_right; | |
169 | } | |
170 | xattr = NULL; | |
171 | } | |
172 | ||
173 | if (!xattr) { | |
174 | new = 1; | |
175 | xattr = *newxattr; | |
176 | xattr->name = name; | |
177 | xattr->name_len = name_len; | |
178 | xattr->should_free_name = should_free_name; | |
179 | ||
180 | ci->i_xattrs.count++; | |
181 | dout("__set_xattr count=%d\n", ci->i_xattrs.count); | |
182 | } else { | |
183 | kfree(*newxattr); | |
184 | *newxattr = NULL; | |
185 | if (xattr->should_free_val) | |
186 | kfree((void *)xattr->val); | |
187 | ||
188 | if (should_free_name) { | |
189 | kfree((void *)name); | |
190 | name = xattr->name; | |
191 | } | |
192 | ci->i_xattrs.names_size -= xattr->name_len; | |
193 | ci->i_xattrs.vals_size -= xattr->val_len; | |
194 | } | |
355da1eb SW |
195 | ci->i_xattrs.names_size += name_len; |
196 | ci->i_xattrs.vals_size += val_len; | |
197 | if (val) | |
198 | xattr->val = val; | |
199 | else | |
200 | xattr->val = ""; | |
201 | ||
202 | xattr->val_len = val_len; | |
203 | xattr->dirty = dirty; | |
204 | xattr->should_free_val = (val && should_free_val); | |
205 | ||
206 | if (new) { | |
207 | rb_link_node(&xattr->node, parent, p); | |
208 | rb_insert_color(&xattr->node, &ci->i_xattrs.index); | |
209 | dout("__set_xattr_val p=%p\n", p); | |
210 | } | |
211 | ||
212 | dout("__set_xattr_val added %llx.%llx xattr %p %s=%.*s\n", | |
213 | ceph_vinop(&ci->vfs_inode), xattr, name, val_len, val); | |
214 | ||
215 | return 0; | |
216 | } | |
217 | ||
218 | static struct ceph_inode_xattr *__get_xattr(struct ceph_inode_info *ci, | |
219 | const char *name) | |
220 | { | |
221 | struct rb_node **p; | |
222 | struct rb_node *parent = NULL; | |
223 | struct ceph_inode_xattr *xattr = NULL; | |
17db143f | 224 | int name_len = strlen(name); |
355da1eb SW |
225 | int c; |
226 | ||
227 | p = &ci->i_xattrs.index.rb_node; | |
228 | while (*p) { | |
229 | parent = *p; | |
230 | xattr = rb_entry(parent, struct ceph_inode_xattr, node); | |
231 | c = strncmp(name, xattr->name, xattr->name_len); | |
17db143f SW |
232 | if (c == 0 && name_len > xattr->name_len) |
233 | c = 1; | |
355da1eb SW |
234 | if (c < 0) |
235 | p = &(*p)->rb_left; | |
236 | else if (c > 0) | |
237 | p = &(*p)->rb_right; | |
238 | else { | |
239 | dout("__get_xattr %s: found %.*s\n", name, | |
240 | xattr->val_len, xattr->val); | |
241 | return xattr; | |
242 | } | |
243 | } | |
244 | ||
245 | dout("__get_xattr %s: not found\n", name); | |
246 | ||
247 | return NULL; | |
248 | } | |
249 | ||
250 | static void __free_xattr(struct ceph_inode_xattr *xattr) | |
251 | { | |
252 | BUG_ON(!xattr); | |
253 | ||
254 | if (xattr->should_free_name) | |
255 | kfree((void *)xattr->name); | |
256 | if (xattr->should_free_val) | |
257 | kfree((void *)xattr->val); | |
258 | ||
259 | kfree(xattr); | |
260 | } | |
261 | ||
262 | static int __remove_xattr(struct ceph_inode_info *ci, | |
263 | struct ceph_inode_xattr *xattr) | |
264 | { | |
265 | if (!xattr) | |
266 | return -EOPNOTSUPP; | |
267 | ||
268 | rb_erase(&xattr->node, &ci->i_xattrs.index); | |
269 | ||
270 | if (xattr->should_free_name) | |
271 | kfree((void *)xattr->name); | |
272 | if (xattr->should_free_val) | |
273 | kfree((void *)xattr->val); | |
274 | ||
275 | ci->i_xattrs.names_size -= xattr->name_len; | |
276 | ci->i_xattrs.vals_size -= xattr->val_len; | |
277 | ci->i_xattrs.count--; | |
278 | kfree(xattr); | |
279 | ||
280 | return 0; | |
281 | } | |
282 | ||
283 | static int __remove_xattr_by_name(struct ceph_inode_info *ci, | |
284 | const char *name) | |
285 | { | |
286 | struct rb_node **p; | |
287 | struct ceph_inode_xattr *xattr; | |
288 | int err; | |
289 | ||
290 | p = &ci->i_xattrs.index.rb_node; | |
291 | xattr = __get_xattr(ci, name); | |
292 | err = __remove_xattr(ci, xattr); | |
293 | return err; | |
294 | } | |
295 | ||
296 | static char *__copy_xattr_names(struct ceph_inode_info *ci, | |
297 | char *dest) | |
298 | { | |
299 | struct rb_node *p; | |
300 | struct ceph_inode_xattr *xattr = NULL; | |
301 | ||
302 | p = rb_first(&ci->i_xattrs.index); | |
303 | dout("__copy_xattr_names count=%d\n", ci->i_xattrs.count); | |
304 | ||
305 | while (p) { | |
306 | xattr = rb_entry(p, struct ceph_inode_xattr, node); | |
307 | memcpy(dest, xattr->name, xattr->name_len); | |
308 | dest[xattr->name_len] = '\0'; | |
309 | ||
310 | dout("dest=%s %p (%s) (%d/%d)\n", dest, xattr, xattr->name, | |
311 | xattr->name_len, ci->i_xattrs.names_size); | |
312 | ||
313 | dest += xattr->name_len + 1; | |
314 | p = rb_next(p); | |
315 | } | |
316 | ||
317 | return dest; | |
318 | } | |
319 | ||
320 | void __ceph_destroy_xattrs(struct ceph_inode_info *ci) | |
321 | { | |
322 | struct rb_node *p, *tmp; | |
323 | struct ceph_inode_xattr *xattr = NULL; | |
324 | ||
325 | p = rb_first(&ci->i_xattrs.index); | |
326 | ||
327 | dout("__ceph_destroy_xattrs p=%p\n", p); | |
328 | ||
329 | while (p) { | |
330 | xattr = rb_entry(p, struct ceph_inode_xattr, node); | |
331 | tmp = p; | |
332 | p = rb_next(tmp); | |
333 | dout("__ceph_destroy_xattrs next p=%p (%.*s)\n", p, | |
334 | xattr->name_len, xattr->name); | |
335 | rb_erase(tmp, &ci->i_xattrs.index); | |
336 | ||
337 | __free_xattr(xattr); | |
338 | } | |
339 | ||
340 | ci->i_xattrs.names_size = 0; | |
341 | ci->i_xattrs.vals_size = 0; | |
342 | ci->i_xattrs.index_version = 0; | |
343 | ci->i_xattrs.count = 0; | |
344 | ci->i_xattrs.index = RB_ROOT; | |
345 | } | |
346 | ||
347 | static int __build_xattrs(struct inode *inode) | |
be655596 SW |
348 | __releases(ci->i_ceph_lock) |
349 | __acquires(ci->i_ceph_lock) | |
355da1eb SW |
350 | { |
351 | u32 namelen; | |
352 | u32 numattr = 0; | |
353 | void *p, *end; | |
354 | u32 len; | |
355 | const char *name, *val; | |
356 | struct ceph_inode_info *ci = ceph_inode(inode); | |
357 | int xattr_version; | |
358 | struct ceph_inode_xattr **xattrs = NULL; | |
63ff78b2 | 359 | int err = 0; |
355da1eb SW |
360 | int i; |
361 | ||
362 | dout("__build_xattrs() len=%d\n", | |
363 | ci->i_xattrs.blob ? (int)ci->i_xattrs.blob->vec.iov_len : 0); | |
364 | ||
365 | if (ci->i_xattrs.index_version >= ci->i_xattrs.version) | |
366 | return 0; /* already built */ | |
367 | ||
368 | __ceph_destroy_xattrs(ci); | |
369 | ||
370 | start: | |
371 | /* updated internal xattr rb tree */ | |
372 | if (ci->i_xattrs.blob && ci->i_xattrs.blob->vec.iov_len > 4) { | |
373 | p = ci->i_xattrs.blob->vec.iov_base; | |
374 | end = p + ci->i_xattrs.blob->vec.iov_len; | |
375 | ceph_decode_32_safe(&p, end, numattr, bad); | |
376 | xattr_version = ci->i_xattrs.version; | |
be655596 | 377 | spin_unlock(&ci->i_ceph_lock); |
355da1eb SW |
378 | |
379 | xattrs = kcalloc(numattr, sizeof(struct ceph_xattr *), | |
380 | GFP_NOFS); | |
381 | err = -ENOMEM; | |
382 | if (!xattrs) | |
383 | goto bad_lock; | |
384 | memset(xattrs, 0, numattr*sizeof(struct ceph_xattr *)); | |
385 | for (i = 0; i < numattr; i++) { | |
386 | xattrs[i] = kmalloc(sizeof(struct ceph_inode_xattr), | |
387 | GFP_NOFS); | |
388 | if (!xattrs[i]) | |
389 | goto bad_lock; | |
390 | } | |
391 | ||
be655596 | 392 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
393 | if (ci->i_xattrs.version != xattr_version) { |
394 | /* lost a race, retry */ | |
395 | for (i = 0; i < numattr; i++) | |
396 | kfree(xattrs[i]); | |
397 | kfree(xattrs); | |
398 | goto start; | |
399 | } | |
400 | err = -EIO; | |
401 | while (numattr--) { | |
402 | ceph_decode_32_safe(&p, end, len, bad); | |
403 | namelen = len; | |
404 | name = p; | |
405 | p += len; | |
406 | ceph_decode_32_safe(&p, end, len, bad); | |
407 | val = p; | |
408 | p += len; | |
409 | ||
410 | err = __set_xattr(ci, name, namelen, val, len, | |
411 | 0, 0, 0, &xattrs[numattr]); | |
412 | ||
413 | if (err < 0) | |
414 | goto bad; | |
415 | } | |
416 | kfree(xattrs); | |
417 | } | |
418 | ci->i_xattrs.index_version = ci->i_xattrs.version; | |
419 | ci->i_xattrs.dirty = false; | |
420 | ||
421 | return err; | |
422 | bad_lock: | |
be655596 | 423 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
424 | bad: |
425 | if (xattrs) { | |
426 | for (i = 0; i < numattr; i++) | |
427 | kfree(xattrs[i]); | |
428 | kfree(xattrs); | |
429 | } | |
430 | ci->i_xattrs.names_size = 0; | |
431 | return err; | |
432 | } | |
433 | ||
434 | static int __get_required_blob_size(struct ceph_inode_info *ci, int name_size, | |
435 | int val_size) | |
436 | { | |
437 | /* | |
438 | * 4 bytes for the length, and additional 4 bytes per each xattr name, | |
439 | * 4 bytes per each value | |
440 | */ | |
441 | int size = 4 + ci->i_xattrs.count*(4 + 4) + | |
442 | ci->i_xattrs.names_size + | |
443 | ci->i_xattrs.vals_size; | |
444 | dout("__get_required_blob_size c=%d names.size=%d vals.size=%d\n", | |
445 | ci->i_xattrs.count, ci->i_xattrs.names_size, | |
446 | ci->i_xattrs.vals_size); | |
447 | ||
448 | if (name_size) | |
449 | size += 4 + 4 + name_size + val_size; | |
450 | ||
451 | return size; | |
452 | } | |
453 | ||
454 | /* | |
455 | * If there are dirty xattrs, reencode xattrs into the prealloc_blob | |
456 | * and swap into place. | |
457 | */ | |
458 | void __ceph_build_xattrs_blob(struct ceph_inode_info *ci) | |
459 | { | |
460 | struct rb_node *p; | |
461 | struct ceph_inode_xattr *xattr = NULL; | |
462 | void *dest; | |
463 | ||
464 | dout("__build_xattrs_blob %p\n", &ci->vfs_inode); | |
465 | if (ci->i_xattrs.dirty) { | |
466 | int need = __get_required_blob_size(ci, 0, 0); | |
467 | ||
468 | BUG_ON(need > ci->i_xattrs.prealloc_blob->alloc_len); | |
469 | ||
470 | p = rb_first(&ci->i_xattrs.index); | |
471 | dest = ci->i_xattrs.prealloc_blob->vec.iov_base; | |
472 | ||
473 | ceph_encode_32(&dest, ci->i_xattrs.count); | |
474 | while (p) { | |
475 | xattr = rb_entry(p, struct ceph_inode_xattr, node); | |
476 | ||
477 | ceph_encode_32(&dest, xattr->name_len); | |
478 | memcpy(dest, xattr->name, xattr->name_len); | |
479 | dest += xattr->name_len; | |
480 | ceph_encode_32(&dest, xattr->val_len); | |
481 | memcpy(dest, xattr->val, xattr->val_len); | |
482 | dest += xattr->val_len; | |
483 | ||
484 | p = rb_next(p); | |
485 | } | |
486 | ||
487 | /* adjust buffer len; it may be larger than we need */ | |
488 | ci->i_xattrs.prealloc_blob->vec.iov_len = | |
489 | dest - ci->i_xattrs.prealloc_blob->vec.iov_base; | |
490 | ||
b6c1d5b8 SW |
491 | if (ci->i_xattrs.blob) |
492 | ceph_buffer_put(ci->i_xattrs.blob); | |
355da1eb SW |
493 | ci->i_xattrs.blob = ci->i_xattrs.prealloc_blob; |
494 | ci->i_xattrs.prealloc_blob = NULL; | |
495 | ci->i_xattrs.dirty = false; | |
4a625be4 | 496 | ci->i_xattrs.version++; |
355da1eb SW |
497 | } |
498 | } | |
499 | ||
500 | ssize_t ceph_getxattr(struct dentry *dentry, const char *name, void *value, | |
501 | size_t size) | |
502 | { | |
503 | struct inode *inode = dentry->d_inode; | |
504 | struct ceph_inode_info *ci = ceph_inode(inode); | |
505 | struct ceph_vxattr_cb *vxattrs = ceph_inode_vxattrs(inode); | |
506 | int err; | |
507 | struct ceph_inode_xattr *xattr; | |
508 | struct ceph_vxattr_cb *vxattr = NULL; | |
509 | ||
510 | if (!ceph_is_valid_xattr(name)) | |
511 | return -ENODATA; | |
512 | ||
513 | /* let's see if a virtual xattr was requested */ | |
514 | if (vxattrs) | |
515 | vxattr = ceph_match_vxattr(vxattrs, name); | |
516 | ||
be655596 | 517 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
518 | dout("getxattr %p ver=%lld index_ver=%lld\n", inode, |
519 | ci->i_xattrs.version, ci->i_xattrs.index_version); | |
520 | ||
521 | if (__ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 1) && | |
522 | (ci->i_xattrs.index_version >= ci->i_xattrs.version)) { | |
523 | goto get_xattr; | |
524 | } else { | |
be655596 | 525 | spin_unlock(&ci->i_ceph_lock); |
355da1eb SW |
526 | /* get xattrs from mds (if we don't already have them) */ |
527 | err = ceph_do_getattr(inode, CEPH_STAT_CAP_XATTR); | |
528 | if (err) | |
529 | return err; | |
530 | } | |
531 | ||
be655596 | 532 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
533 | |
534 | if (vxattr && vxattr->readonly) { | |
535 | err = vxattr->getxattr_cb(ci, value, size); | |
536 | goto out; | |
537 | } | |
538 | ||
539 | err = __build_xattrs(inode); | |
540 | if (err < 0) | |
541 | goto out; | |
542 | ||
543 | get_xattr: | |
544 | err = -ENODATA; /* == ENOATTR */ | |
545 | xattr = __get_xattr(ci, name); | |
546 | if (!xattr) { | |
547 | if (vxattr) | |
548 | err = vxattr->getxattr_cb(ci, value, size); | |
549 | goto out; | |
550 | } | |
551 | ||
552 | err = -ERANGE; | |
553 | if (size && size < xattr->val_len) | |
554 | goto out; | |
555 | ||
556 | err = xattr->val_len; | |
557 | if (size == 0) | |
558 | goto out; | |
559 | ||
560 | memcpy(value, xattr->val, xattr->val_len); | |
561 | ||
562 | out: | |
be655596 | 563 | spin_unlock(&ci->i_ceph_lock); |
355da1eb SW |
564 | return err; |
565 | } | |
566 | ||
567 | ssize_t ceph_listxattr(struct dentry *dentry, char *names, size_t size) | |
568 | { | |
569 | struct inode *inode = dentry->d_inode; | |
570 | struct ceph_inode_info *ci = ceph_inode(inode); | |
571 | struct ceph_vxattr_cb *vxattrs = ceph_inode_vxattrs(inode); | |
572 | u32 vir_namelen = 0; | |
573 | u32 namelen; | |
574 | int err; | |
575 | u32 len; | |
576 | int i; | |
577 | ||
be655596 | 578 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
579 | dout("listxattr %p ver=%lld index_ver=%lld\n", inode, |
580 | ci->i_xattrs.version, ci->i_xattrs.index_version); | |
581 | ||
582 | if (__ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 1) && | |
bddfa3cc | 583 | (ci->i_xattrs.index_version >= ci->i_xattrs.version)) { |
355da1eb SW |
584 | goto list_xattr; |
585 | } else { | |
be655596 | 586 | spin_unlock(&ci->i_ceph_lock); |
355da1eb SW |
587 | err = ceph_do_getattr(inode, CEPH_STAT_CAP_XATTR); |
588 | if (err) | |
589 | return err; | |
590 | } | |
591 | ||
be655596 | 592 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
593 | |
594 | err = __build_xattrs(inode); | |
595 | if (err < 0) | |
596 | goto out; | |
597 | ||
598 | list_xattr: | |
599 | vir_namelen = 0; | |
600 | /* include virtual dir xattrs */ | |
601 | if (vxattrs) | |
602 | for (i = 0; vxattrs[i].name; i++) | |
603 | vir_namelen += strlen(vxattrs[i].name) + 1; | |
604 | /* adding 1 byte per each variable due to the null termination */ | |
605 | namelen = vir_namelen + ci->i_xattrs.names_size + ci->i_xattrs.count; | |
606 | err = -ERANGE; | |
607 | if (size && namelen > size) | |
608 | goto out; | |
609 | ||
610 | err = namelen; | |
611 | if (size == 0) | |
612 | goto out; | |
613 | ||
614 | names = __copy_xattr_names(ci, names); | |
615 | ||
616 | /* virtual xattr names, too */ | |
617 | if (vxattrs) | |
618 | for (i = 0; vxattrs[i].name; i++) { | |
619 | len = sprintf(names, "%s", vxattrs[i].name); | |
620 | names += len + 1; | |
621 | } | |
622 | ||
623 | out: | |
be655596 | 624 | spin_unlock(&ci->i_ceph_lock); |
355da1eb SW |
625 | return err; |
626 | } | |
627 | ||
628 | static int ceph_sync_setxattr(struct dentry *dentry, const char *name, | |
629 | const char *value, size_t size, int flags) | |
630 | { | |
3d14c5d2 | 631 | struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb); |
355da1eb SW |
632 | struct inode *inode = dentry->d_inode; |
633 | struct ceph_inode_info *ci = ceph_inode(inode); | |
5f21c96d | 634 | struct inode *parent_inode; |
355da1eb | 635 | struct ceph_mds_request *req; |
3d14c5d2 | 636 | struct ceph_mds_client *mdsc = fsc->mdsc; |
355da1eb SW |
637 | int err; |
638 | int i, nr_pages; | |
639 | struct page **pages = NULL; | |
640 | void *kaddr; | |
641 | ||
642 | /* copy value into some pages */ | |
643 | nr_pages = calc_pages_for(0, size); | |
644 | if (nr_pages) { | |
645 | pages = kmalloc(sizeof(pages[0])*nr_pages, GFP_NOFS); | |
646 | if (!pages) | |
647 | return -ENOMEM; | |
648 | err = -ENOMEM; | |
649 | for (i = 0; i < nr_pages; i++) { | |
31459fe4 | 650 | pages[i] = __page_cache_alloc(GFP_NOFS); |
355da1eb SW |
651 | if (!pages[i]) { |
652 | nr_pages = i; | |
653 | goto out; | |
654 | } | |
655 | kaddr = kmap(pages[i]); | |
656 | memcpy(kaddr, value + i*PAGE_CACHE_SIZE, | |
657 | min(PAGE_CACHE_SIZE, size-i*PAGE_CACHE_SIZE)); | |
658 | } | |
659 | } | |
660 | ||
661 | dout("setxattr value=%.*s\n", (int)size, value); | |
662 | ||
663 | /* do request */ | |
664 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETXATTR, | |
665 | USE_AUTH_MDS); | |
60d87733 JL |
666 | if (IS_ERR(req)) { |
667 | err = PTR_ERR(req); | |
668 | goto out; | |
669 | } | |
70b666c3 SW |
670 | req->r_inode = inode; |
671 | ihold(inode); | |
355da1eb SW |
672 | req->r_inode_drop = CEPH_CAP_XATTR_SHARED; |
673 | req->r_num_caps = 1; | |
674 | req->r_args.setxattr.flags = cpu_to_le32(flags); | |
675 | req->r_path2 = kstrdup(name, GFP_NOFS); | |
676 | ||
677 | req->r_pages = pages; | |
678 | req->r_num_pages = nr_pages; | |
679 | req->r_data_len = size; | |
680 | ||
681 | dout("xattr.ver (before): %lld\n", ci->i_xattrs.version); | |
5f21c96d | 682 | parent_inode = ceph_get_dentry_parent_inode(dentry); |
355da1eb | 683 | err = ceph_mdsc_do_request(mdsc, parent_inode, req); |
5f21c96d | 684 | iput(parent_inode); |
355da1eb SW |
685 | ceph_mdsc_put_request(req); |
686 | dout("xattr.ver (after): %lld\n", ci->i_xattrs.version); | |
687 | ||
688 | out: | |
689 | if (pages) { | |
690 | for (i = 0; i < nr_pages; i++) | |
691 | __free_page(pages[i]); | |
692 | kfree(pages); | |
693 | } | |
694 | return err; | |
695 | } | |
696 | ||
697 | int ceph_setxattr(struct dentry *dentry, const char *name, | |
698 | const void *value, size_t size, int flags) | |
699 | { | |
700 | struct inode *inode = dentry->d_inode; | |
701 | struct ceph_inode_info *ci = ceph_inode(inode); | |
702 | struct ceph_vxattr_cb *vxattrs = ceph_inode_vxattrs(inode); | |
703 | int err; | |
704 | int name_len = strlen(name); | |
705 | int val_len = size; | |
706 | char *newname = NULL; | |
707 | char *newval = NULL; | |
708 | struct ceph_inode_xattr *xattr = NULL; | |
709 | int issued; | |
710 | int required_blob_size; | |
fca65b4a | 711 | int dirty; |
355da1eb SW |
712 | |
713 | if (ceph_snap(inode) != CEPH_NOSNAP) | |
714 | return -EROFS; | |
715 | ||
716 | if (!ceph_is_valid_xattr(name)) | |
717 | return -EOPNOTSUPP; | |
718 | ||
719 | if (vxattrs) { | |
720 | struct ceph_vxattr_cb *vxattr = | |
721 | ceph_match_vxattr(vxattrs, name); | |
722 | if (vxattr && vxattr->readonly) | |
723 | return -EOPNOTSUPP; | |
724 | } | |
725 | ||
726 | /* preallocate memory for xattr name, value, index node */ | |
727 | err = -ENOMEM; | |
61413c2f | 728 | newname = kmemdup(name, name_len + 1, GFP_NOFS); |
355da1eb SW |
729 | if (!newname) |
730 | goto out; | |
355da1eb SW |
731 | |
732 | if (val_len) { | |
733 | newval = kmalloc(val_len + 1, GFP_NOFS); | |
734 | if (!newval) | |
735 | goto out; | |
736 | memcpy(newval, value, val_len); | |
737 | newval[val_len] = '\0'; | |
738 | } | |
739 | ||
740 | xattr = kmalloc(sizeof(struct ceph_inode_xattr), GFP_NOFS); | |
741 | if (!xattr) | |
742 | goto out; | |
743 | ||
be655596 | 744 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
745 | retry: |
746 | issued = __ceph_caps_issued(ci, NULL); | |
747 | if (!(issued & CEPH_CAP_XATTR_EXCL)) | |
748 | goto do_sync; | |
749 | __build_xattrs(inode); | |
750 | ||
751 | required_blob_size = __get_required_blob_size(ci, name_len, val_len); | |
752 | ||
753 | if (!ci->i_xattrs.prealloc_blob || | |
754 | required_blob_size > ci->i_xattrs.prealloc_blob->alloc_len) { | |
755 | struct ceph_buffer *blob = NULL; | |
756 | ||
be655596 | 757 | spin_unlock(&ci->i_ceph_lock); |
355da1eb | 758 | dout(" preaallocating new blob size=%d\n", required_blob_size); |
b6c1d5b8 | 759 | blob = ceph_buffer_new(required_blob_size, GFP_NOFS); |
355da1eb SW |
760 | if (!blob) |
761 | goto out; | |
be655596 | 762 | spin_lock(&ci->i_ceph_lock); |
b6c1d5b8 SW |
763 | if (ci->i_xattrs.prealloc_blob) |
764 | ceph_buffer_put(ci->i_xattrs.prealloc_blob); | |
355da1eb SW |
765 | ci->i_xattrs.prealloc_blob = blob; |
766 | goto retry; | |
767 | } | |
768 | ||
769 | dout("setxattr %p issued %s\n", inode, ceph_cap_string(issued)); | |
770 | err = __set_xattr(ci, newname, name_len, newval, | |
771 | val_len, 1, 1, 1, &xattr); | |
fca65b4a | 772 | dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_XATTR_EXCL); |
355da1eb SW |
773 | ci->i_xattrs.dirty = true; |
774 | inode->i_ctime = CURRENT_TIME; | |
be655596 | 775 | spin_unlock(&ci->i_ceph_lock); |
fca65b4a SW |
776 | if (dirty) |
777 | __mark_inode_dirty(inode, dirty); | |
355da1eb SW |
778 | return err; |
779 | ||
780 | do_sync: | |
be655596 | 781 | spin_unlock(&ci->i_ceph_lock); |
355da1eb SW |
782 | err = ceph_sync_setxattr(dentry, name, value, size, flags); |
783 | out: | |
784 | kfree(newname); | |
785 | kfree(newval); | |
786 | kfree(xattr); | |
787 | return err; | |
788 | } | |
789 | ||
790 | static int ceph_send_removexattr(struct dentry *dentry, const char *name) | |
791 | { | |
3d14c5d2 YS |
792 | struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb); |
793 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
355da1eb | 794 | struct inode *inode = dentry->d_inode; |
5f21c96d | 795 | struct inode *parent_inode; |
355da1eb SW |
796 | struct ceph_mds_request *req; |
797 | int err; | |
798 | ||
799 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_RMXATTR, | |
800 | USE_AUTH_MDS); | |
801 | if (IS_ERR(req)) | |
802 | return PTR_ERR(req); | |
70b666c3 SW |
803 | req->r_inode = inode; |
804 | ihold(inode); | |
355da1eb SW |
805 | req->r_inode_drop = CEPH_CAP_XATTR_SHARED; |
806 | req->r_num_caps = 1; | |
807 | req->r_path2 = kstrdup(name, GFP_NOFS); | |
808 | ||
5f21c96d | 809 | parent_inode = ceph_get_dentry_parent_inode(dentry); |
355da1eb | 810 | err = ceph_mdsc_do_request(mdsc, parent_inode, req); |
5f21c96d | 811 | iput(parent_inode); |
355da1eb SW |
812 | ceph_mdsc_put_request(req); |
813 | return err; | |
814 | } | |
815 | ||
816 | int ceph_removexattr(struct dentry *dentry, const char *name) | |
817 | { | |
818 | struct inode *inode = dentry->d_inode; | |
819 | struct ceph_inode_info *ci = ceph_inode(inode); | |
820 | struct ceph_vxattr_cb *vxattrs = ceph_inode_vxattrs(inode); | |
821 | int issued; | |
822 | int err; | |
83eb26af | 823 | int required_blob_size; |
fca65b4a | 824 | int dirty; |
355da1eb SW |
825 | |
826 | if (ceph_snap(inode) != CEPH_NOSNAP) | |
827 | return -EROFS; | |
828 | ||
829 | if (!ceph_is_valid_xattr(name)) | |
830 | return -EOPNOTSUPP; | |
831 | ||
832 | if (vxattrs) { | |
833 | struct ceph_vxattr_cb *vxattr = | |
834 | ceph_match_vxattr(vxattrs, name); | |
835 | if (vxattr && vxattr->readonly) | |
836 | return -EOPNOTSUPP; | |
837 | } | |
838 | ||
83eb26af | 839 | err = -ENOMEM; |
be655596 | 840 | spin_lock(&ci->i_ceph_lock); |
355da1eb | 841 | __build_xattrs(inode); |
83eb26af | 842 | retry: |
355da1eb SW |
843 | issued = __ceph_caps_issued(ci, NULL); |
844 | dout("removexattr %p issued %s\n", inode, ceph_cap_string(issued)); | |
845 | ||
846 | if (!(issued & CEPH_CAP_XATTR_EXCL)) | |
847 | goto do_sync; | |
848 | ||
83eb26af AE |
849 | required_blob_size = __get_required_blob_size(ci, 0, 0); |
850 | ||
851 | if (!ci->i_xattrs.prealloc_blob || | |
852 | required_blob_size > ci->i_xattrs.prealloc_blob->alloc_len) { | |
853 | struct ceph_buffer *blob; | |
854 | ||
855 | spin_unlock(&ci->i_ceph_lock); | |
856 | dout(" preaallocating new blob size=%d\n", required_blob_size); | |
857 | blob = ceph_buffer_new(required_blob_size, GFP_NOFS); | |
858 | if (!blob) | |
859 | goto out; | |
860 | spin_lock(&ci->i_ceph_lock); | |
861 | if (ci->i_xattrs.prealloc_blob) | |
862 | ceph_buffer_put(ci->i_xattrs.prealloc_blob); | |
863 | ci->i_xattrs.prealloc_blob = blob; | |
864 | goto retry; | |
865 | } | |
866 | ||
355da1eb | 867 | err = __remove_xattr_by_name(ceph_inode(inode), name); |
fca65b4a | 868 | dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_XATTR_EXCL); |
355da1eb SW |
869 | ci->i_xattrs.dirty = true; |
870 | inode->i_ctime = CURRENT_TIME; | |
871 | ||
be655596 | 872 | spin_unlock(&ci->i_ceph_lock); |
fca65b4a SW |
873 | if (dirty) |
874 | __mark_inode_dirty(inode, dirty); | |
355da1eb SW |
875 | return err; |
876 | do_sync: | |
be655596 | 877 | spin_unlock(&ci->i_ceph_lock); |
355da1eb | 878 | err = ceph_send_removexattr(dentry, name); |
83eb26af | 879 | out: |
355da1eb SW |
880 | return err; |
881 | } | |
882 |