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Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
3d14c5d2 | 2 | #include <linux/ceph/ceph_debug.h> |
25e6bae3 | 3 | #include <linux/ceph/pagelist.h> |
3d14c5d2 | 4 | |
355da1eb | 5 | #include "super.h" |
3d14c5d2 YS |
6 | #include "mds_client.h" |
7 | ||
8 | #include <linux/ceph/decode.h> | |
355da1eb SW |
9 | |
10 | #include <linux/xattr.h> | |
4db658ea | 11 | #include <linux/posix_acl_xattr.h> |
5a0e3ad6 | 12 | #include <linux/slab.h> |
355da1eb | 13 | |
22891907 AE |
14 | #define XATTR_CEPH_PREFIX "ceph." |
15 | #define XATTR_CEPH_PREFIX_LEN (sizeof (XATTR_CEPH_PREFIX) - 1) | |
16 | ||
bcdfeb2e YZ |
17 | static int __remove_xattr(struct ceph_inode_info *ci, |
18 | struct ceph_inode_xattr *xattr); | |
19 | ||
5130ccea | 20 | static const struct xattr_handler ceph_other_xattr_handler; |
2cdeb1e4 | 21 | |
7221fe4c GZ |
22 | /* |
23 | * List of handlers for synthetic system.* attributes. Other | |
24 | * attributes are handled directly. | |
25 | */ | |
26 | const struct xattr_handler *ceph_xattr_handlers[] = { | |
27 | #ifdef CONFIG_CEPH_FS_POSIX_ACL | |
4db658ea LT |
28 | &posix_acl_access_xattr_handler, |
29 | &posix_acl_default_xattr_handler, | |
7221fe4c | 30 | #endif |
2cdeb1e4 | 31 | &ceph_other_xattr_handler, |
7221fe4c GZ |
32 | NULL, |
33 | }; | |
34 | ||
355da1eb SW |
35 | static bool ceph_is_valid_xattr(const char *name) |
36 | { | |
22891907 | 37 | return !strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN) || |
1a756278 | 38 | !strncmp(name, XATTR_SECURITY_PREFIX, |
355da1eb SW |
39 | XATTR_SECURITY_PREFIX_LEN) || |
40 | !strncmp(name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN) || | |
41 | !strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN); | |
42 | } | |
43 | ||
44 | /* | |
45 | * These define virtual xattrs exposing the recursive directory | |
46 | * statistics and layout metadata. | |
47 | */ | |
881a5fa2 | 48 | struct ceph_vxattr { |
355da1eb | 49 | char *name; |
3ce6cd12 | 50 | size_t name_size; /* strlen(name) + 1 (for '\0') */ |
355da1eb SW |
51 | size_t (*getxattr_cb)(struct ceph_inode_info *ci, char *val, |
52 | size_t size); | |
8860147a | 53 | bool readonly, hidden; |
f36e4472 | 54 | bool (*exists_cb)(struct ceph_inode_info *ci); |
355da1eb SW |
55 | }; |
56 | ||
32ab0bd7 SW |
57 | /* layouts */ |
58 | ||
59 | static bool ceph_vxattrcb_layout_exists(struct ceph_inode_info *ci) | |
60 | { | |
779fe0fb YZ |
61 | struct ceph_file_layout *fl = &ci->i_layout; |
62 | return (fl->stripe_unit > 0 || fl->stripe_count > 0 || | |
63 | fl->object_size > 0 || fl->pool_id >= 0 || | |
64 | rcu_dereference_raw(fl->pool_ns) != NULL); | |
32ab0bd7 SW |
65 | } |
66 | ||
67 | static size_t ceph_vxattrcb_layout(struct ceph_inode_info *ci, char *val, | |
1e5c6649 | 68 | size_t size) |
32ab0bd7 | 69 | { |
32ab0bd7 SW |
70 | struct ceph_fs_client *fsc = ceph_sb_to_client(ci->vfs_inode.i_sb); |
71 | struct ceph_osd_client *osdc = &fsc->client->osdc; | |
779fe0fb | 72 | struct ceph_string *pool_ns; |
7627151e | 73 | s64 pool = ci->i_layout.pool_id; |
32ab0bd7 | 74 | const char *pool_name; |
779fe0fb | 75 | const char *ns_field = " pool_namespace="; |
1e5c6649 | 76 | char buf[128]; |
779fe0fb YZ |
77 | size_t len, total_len = 0; |
78 | int ret; | |
79 | ||
80 | pool_ns = ceph_try_get_string(ci->i_layout.pool_ns); | |
32ab0bd7 SW |
81 | |
82 | dout("ceph_vxattrcb_layout %p\n", &ci->vfs_inode); | |
5aea3dcd | 83 | down_read(&osdc->lock); |
32ab0bd7 | 84 | pool_name = ceph_pg_pool_name_by_id(osdc->osdmap, pool); |
1e5c6649 | 85 | if (pool_name) { |
779fe0fb | 86 | len = snprintf(buf, sizeof(buf), |
7627151e YZ |
87 | "stripe_unit=%u stripe_count=%u object_size=%u pool=", |
88 | ci->i_layout.stripe_unit, ci->i_layout.stripe_count, | |
89 | ci->i_layout.object_size); | |
779fe0fb | 90 | total_len = len + strlen(pool_name); |
1e5c6649 | 91 | } else { |
779fe0fb | 92 | len = snprintf(buf, sizeof(buf), |
7627151e YZ |
93 | "stripe_unit=%u stripe_count=%u object_size=%u pool=%lld", |
94 | ci->i_layout.stripe_unit, ci->i_layout.stripe_count, | |
95 | ci->i_layout.object_size, (unsigned long long)pool); | |
779fe0fb YZ |
96 | total_len = len; |
97 | } | |
98 | ||
99 | if (pool_ns) | |
100 | total_len += strlen(ns_field) + pool_ns->len; | |
101 | ||
102 | if (!size) { | |
103 | ret = total_len; | |
104 | } else if (total_len > size) { | |
105 | ret = -ERANGE; | |
106 | } else { | |
107 | memcpy(val, buf, len); | |
108 | ret = len; | |
109 | if (pool_name) { | |
110 | len = strlen(pool_name); | |
111 | memcpy(val + ret, pool_name, len); | |
112 | ret += len; | |
113 | } | |
114 | if (pool_ns) { | |
115 | len = strlen(ns_field); | |
116 | memcpy(val + ret, ns_field, len); | |
117 | ret += len; | |
118 | memcpy(val + ret, pool_ns->str, pool_ns->len); | |
119 | ret += pool_ns->len; | |
1e5c6649 YZ |
120 | } |
121 | } | |
5aea3dcd | 122 | up_read(&osdc->lock); |
779fe0fb | 123 | ceph_put_string(pool_ns); |
32ab0bd7 SW |
124 | return ret; |
125 | } | |
126 | ||
695b7119 SW |
127 | static size_t ceph_vxattrcb_layout_stripe_unit(struct ceph_inode_info *ci, |
128 | char *val, size_t size) | |
129 | { | |
7627151e | 130 | return snprintf(val, size, "%u", ci->i_layout.stripe_unit); |
695b7119 SW |
131 | } |
132 | ||
133 | static size_t ceph_vxattrcb_layout_stripe_count(struct ceph_inode_info *ci, | |
134 | char *val, size_t size) | |
135 | { | |
7627151e | 136 | return snprintf(val, size, "%u", ci->i_layout.stripe_count); |
695b7119 SW |
137 | } |
138 | ||
139 | static size_t ceph_vxattrcb_layout_object_size(struct ceph_inode_info *ci, | |
140 | char *val, size_t size) | |
141 | { | |
7627151e | 142 | return snprintf(val, size, "%u", ci->i_layout.object_size); |
695b7119 SW |
143 | } |
144 | ||
145 | static size_t ceph_vxattrcb_layout_pool(struct ceph_inode_info *ci, | |
146 | char *val, size_t size) | |
147 | { | |
148 | int ret; | |
149 | struct ceph_fs_client *fsc = ceph_sb_to_client(ci->vfs_inode.i_sb); | |
150 | struct ceph_osd_client *osdc = &fsc->client->osdc; | |
7627151e | 151 | s64 pool = ci->i_layout.pool_id; |
695b7119 SW |
152 | const char *pool_name; |
153 | ||
5aea3dcd | 154 | down_read(&osdc->lock); |
695b7119 SW |
155 | pool_name = ceph_pg_pool_name_by_id(osdc->osdmap, pool); |
156 | if (pool_name) | |
157 | ret = snprintf(val, size, "%s", pool_name); | |
158 | else | |
159 | ret = snprintf(val, size, "%lld", (unsigned long long)pool); | |
5aea3dcd | 160 | up_read(&osdc->lock); |
695b7119 SW |
161 | return ret; |
162 | } | |
163 | ||
779fe0fb YZ |
164 | static size_t ceph_vxattrcb_layout_pool_namespace(struct ceph_inode_info *ci, |
165 | char *val, size_t size) | |
166 | { | |
167 | int ret = 0; | |
168 | struct ceph_string *ns = ceph_try_get_string(ci->i_layout.pool_ns); | |
169 | if (ns) { | |
170 | ret = snprintf(val, size, "%.*s", (int)ns->len, ns->str); | |
171 | ceph_put_string(ns); | |
172 | } | |
173 | return ret; | |
174 | } | |
175 | ||
355da1eb SW |
176 | /* directories */ |
177 | ||
aa4066ed | 178 | static size_t ceph_vxattrcb_dir_entries(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
179 | size_t size) |
180 | { | |
181 | return snprintf(val, size, "%lld", ci->i_files + ci->i_subdirs); | |
182 | } | |
183 | ||
aa4066ed | 184 | static size_t ceph_vxattrcb_dir_files(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
185 | size_t size) |
186 | { | |
187 | return snprintf(val, size, "%lld", ci->i_files); | |
188 | } | |
189 | ||
aa4066ed | 190 | static size_t ceph_vxattrcb_dir_subdirs(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
191 | size_t size) |
192 | { | |
193 | return snprintf(val, size, "%lld", ci->i_subdirs); | |
194 | } | |
195 | ||
aa4066ed | 196 | static size_t ceph_vxattrcb_dir_rentries(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
197 | size_t size) |
198 | { | |
199 | return snprintf(val, size, "%lld", ci->i_rfiles + ci->i_rsubdirs); | |
200 | } | |
201 | ||
aa4066ed | 202 | static size_t ceph_vxattrcb_dir_rfiles(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
203 | size_t size) |
204 | { | |
205 | return snprintf(val, size, "%lld", ci->i_rfiles); | |
206 | } | |
207 | ||
aa4066ed | 208 | static size_t ceph_vxattrcb_dir_rsubdirs(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
209 | size_t size) |
210 | { | |
211 | return snprintf(val, size, "%lld", ci->i_rsubdirs); | |
212 | } | |
213 | ||
aa4066ed | 214 | static size_t ceph_vxattrcb_dir_rbytes(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
215 | size_t size) |
216 | { | |
217 | return snprintf(val, size, "%lld", ci->i_rbytes); | |
218 | } | |
219 | ||
aa4066ed | 220 | static size_t ceph_vxattrcb_dir_rctime(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
221 | size_t size) |
222 | { | |
3489b42a | 223 | return snprintf(val, size, "%ld.09%ld", (long)ci->i_rctime.tv_sec, |
355da1eb SW |
224 | (long)ci->i_rctime.tv_nsec); |
225 | } | |
226 | ||
fb18a575 LH |
227 | /* quotas */ |
228 | ||
229 | static bool ceph_vxattrcb_quota_exists(struct ceph_inode_info *ci) | |
230 | { | |
231 | return (ci->i_max_files || ci->i_max_bytes); | |
232 | } | |
233 | ||
234 | static size_t ceph_vxattrcb_quota(struct ceph_inode_info *ci, char *val, | |
235 | size_t size) | |
236 | { | |
237 | return snprintf(val, size, "max_bytes=%llu max_files=%llu", | |
238 | ci->i_max_bytes, ci->i_max_files); | |
239 | } | |
240 | ||
241 | static size_t ceph_vxattrcb_quota_max_bytes(struct ceph_inode_info *ci, | |
242 | char *val, size_t size) | |
243 | { | |
244 | return snprintf(val, size, "%llu", ci->i_max_bytes); | |
245 | } | |
246 | ||
247 | static size_t ceph_vxattrcb_quota_max_files(struct ceph_inode_info *ci, | |
248 | char *val, size_t size) | |
249 | { | |
250 | return snprintf(val, size, "%llu", ci->i_max_files); | |
251 | } | |
32ab0bd7 | 252 | |
eb788084 | 253 | #define CEPH_XATTR_NAME(_type, _name) XATTR_CEPH_PREFIX #_type "." #_name |
695b7119 SW |
254 | #define CEPH_XATTR_NAME2(_type, _name, _name2) \ |
255 | XATTR_CEPH_PREFIX #_type "." #_name "." #_name2 | |
eb788084 | 256 | |
8860147a SW |
257 | #define XATTR_NAME_CEPH(_type, _name) \ |
258 | { \ | |
259 | .name = CEPH_XATTR_NAME(_type, _name), \ | |
260 | .name_size = sizeof (CEPH_XATTR_NAME(_type, _name)), \ | |
261 | .getxattr_cb = ceph_vxattrcb_ ## _type ## _ ## _name, \ | |
262 | .readonly = true, \ | |
263 | .hidden = false, \ | |
f36e4472 | 264 | .exists_cb = NULL, \ |
8860147a | 265 | } |
695b7119 SW |
266 | #define XATTR_LAYOUT_FIELD(_type, _name, _field) \ |
267 | { \ | |
268 | .name = CEPH_XATTR_NAME2(_type, _name, _field), \ | |
269 | .name_size = sizeof (CEPH_XATTR_NAME2(_type, _name, _field)), \ | |
270 | .getxattr_cb = ceph_vxattrcb_ ## _name ## _ ## _field, \ | |
271 | .readonly = false, \ | |
272 | .hidden = true, \ | |
273 | .exists_cb = ceph_vxattrcb_layout_exists, \ | |
274 | } | |
fb18a575 LH |
275 | #define XATTR_QUOTA_FIELD(_type, _name) \ |
276 | { \ | |
277 | .name = CEPH_XATTR_NAME(_type, _name), \ | |
278 | .name_size = sizeof(CEPH_XATTR_NAME(_type, _name)), \ | |
279 | .getxattr_cb = ceph_vxattrcb_ ## _type ## _ ## _name, \ | |
280 | .readonly = false, \ | |
281 | .hidden = true, \ | |
282 | .exists_cb = ceph_vxattrcb_quota_exists, \ | |
283 | } | |
eb788084 | 284 | |
881a5fa2 | 285 | static struct ceph_vxattr ceph_dir_vxattrs[] = { |
1f08f2b0 SW |
286 | { |
287 | .name = "ceph.dir.layout", | |
288 | .name_size = sizeof("ceph.dir.layout"), | |
289 | .getxattr_cb = ceph_vxattrcb_layout, | |
290 | .readonly = false, | |
cc48c3e8 | 291 | .hidden = true, |
1f08f2b0 SW |
292 | .exists_cb = ceph_vxattrcb_layout_exists, |
293 | }, | |
695b7119 SW |
294 | XATTR_LAYOUT_FIELD(dir, layout, stripe_unit), |
295 | XATTR_LAYOUT_FIELD(dir, layout, stripe_count), | |
296 | XATTR_LAYOUT_FIELD(dir, layout, object_size), | |
297 | XATTR_LAYOUT_FIELD(dir, layout, pool), | |
779fe0fb | 298 | XATTR_LAYOUT_FIELD(dir, layout, pool_namespace), |
eb788084 AE |
299 | XATTR_NAME_CEPH(dir, entries), |
300 | XATTR_NAME_CEPH(dir, files), | |
301 | XATTR_NAME_CEPH(dir, subdirs), | |
302 | XATTR_NAME_CEPH(dir, rentries), | |
303 | XATTR_NAME_CEPH(dir, rfiles), | |
304 | XATTR_NAME_CEPH(dir, rsubdirs), | |
305 | XATTR_NAME_CEPH(dir, rbytes), | |
306 | XATTR_NAME_CEPH(dir, rctime), | |
fb18a575 LH |
307 | { |
308 | .name = "ceph.quota", | |
309 | .name_size = sizeof("ceph.quota"), | |
310 | .getxattr_cb = ceph_vxattrcb_quota, | |
311 | .readonly = false, | |
312 | .hidden = true, | |
313 | .exists_cb = ceph_vxattrcb_quota_exists, | |
314 | }, | |
315 | XATTR_QUOTA_FIELD(quota, max_bytes), | |
316 | XATTR_QUOTA_FIELD(quota, max_files), | |
2c3dd4ff | 317 | { .name = NULL, 0 } /* Required table terminator */ |
355da1eb | 318 | }; |
3ce6cd12 | 319 | static size_t ceph_dir_vxattrs_name_size; /* total size of all names */ |
355da1eb SW |
320 | |
321 | /* files */ | |
322 | ||
881a5fa2 | 323 | static struct ceph_vxattr ceph_file_vxattrs[] = { |
32ab0bd7 SW |
324 | { |
325 | .name = "ceph.file.layout", | |
326 | .name_size = sizeof("ceph.file.layout"), | |
327 | .getxattr_cb = ceph_vxattrcb_layout, | |
328 | .readonly = false, | |
cc48c3e8 | 329 | .hidden = true, |
32ab0bd7 SW |
330 | .exists_cb = ceph_vxattrcb_layout_exists, |
331 | }, | |
695b7119 SW |
332 | XATTR_LAYOUT_FIELD(file, layout, stripe_unit), |
333 | XATTR_LAYOUT_FIELD(file, layout, stripe_count), | |
334 | XATTR_LAYOUT_FIELD(file, layout, object_size), | |
335 | XATTR_LAYOUT_FIELD(file, layout, pool), | |
779fe0fb | 336 | XATTR_LAYOUT_FIELD(file, layout, pool_namespace), |
2c3dd4ff | 337 | { .name = NULL, 0 } /* Required table terminator */ |
355da1eb | 338 | }; |
3ce6cd12 | 339 | static size_t ceph_file_vxattrs_name_size; /* total size of all names */ |
355da1eb | 340 | |
881a5fa2 | 341 | static struct ceph_vxattr *ceph_inode_vxattrs(struct inode *inode) |
355da1eb SW |
342 | { |
343 | if (S_ISDIR(inode->i_mode)) | |
344 | return ceph_dir_vxattrs; | |
345 | else if (S_ISREG(inode->i_mode)) | |
346 | return ceph_file_vxattrs; | |
347 | return NULL; | |
348 | } | |
349 | ||
3ce6cd12 AE |
350 | static size_t ceph_vxattrs_name_size(struct ceph_vxattr *vxattrs) |
351 | { | |
352 | if (vxattrs == ceph_dir_vxattrs) | |
353 | return ceph_dir_vxattrs_name_size; | |
354 | if (vxattrs == ceph_file_vxattrs) | |
355 | return ceph_file_vxattrs_name_size; | |
0abb43dc | 356 | BUG_ON(vxattrs); |
3ce6cd12 AE |
357 | return 0; |
358 | } | |
359 | ||
360 | /* | |
361 | * Compute the aggregate size (including terminating '\0') of all | |
362 | * virtual extended attribute names in the given vxattr table. | |
363 | */ | |
364 | static size_t __init vxattrs_name_size(struct ceph_vxattr *vxattrs) | |
365 | { | |
366 | struct ceph_vxattr *vxattr; | |
367 | size_t size = 0; | |
368 | ||
369 | for (vxattr = vxattrs; vxattr->name; vxattr++) | |
8860147a SW |
370 | if (!vxattr->hidden) |
371 | size += vxattr->name_size; | |
3ce6cd12 AE |
372 | |
373 | return size; | |
374 | } | |
375 | ||
376 | /* Routines called at initialization and exit time */ | |
377 | ||
378 | void __init ceph_xattr_init(void) | |
379 | { | |
380 | ceph_dir_vxattrs_name_size = vxattrs_name_size(ceph_dir_vxattrs); | |
381 | ceph_file_vxattrs_name_size = vxattrs_name_size(ceph_file_vxattrs); | |
382 | } | |
383 | ||
384 | void ceph_xattr_exit(void) | |
385 | { | |
386 | ceph_dir_vxattrs_name_size = 0; | |
387 | ceph_file_vxattrs_name_size = 0; | |
388 | } | |
389 | ||
881a5fa2 | 390 | static struct ceph_vxattr *ceph_match_vxattr(struct inode *inode, |
355da1eb SW |
391 | const char *name) |
392 | { | |
881a5fa2 | 393 | struct ceph_vxattr *vxattr = ceph_inode_vxattrs(inode); |
06476a69 AE |
394 | |
395 | if (vxattr) { | |
396 | while (vxattr->name) { | |
397 | if (!strcmp(vxattr->name, name)) | |
398 | return vxattr; | |
399 | vxattr++; | |
400 | } | |
401 | } | |
402 | ||
355da1eb SW |
403 | return NULL; |
404 | } | |
405 | ||
406 | static int __set_xattr(struct ceph_inode_info *ci, | |
407 | const char *name, int name_len, | |
408 | const char *val, int val_len, | |
fbc0b970 | 409 | int flags, int update_xattr, |
355da1eb SW |
410 | struct ceph_inode_xattr **newxattr) |
411 | { | |
412 | struct rb_node **p; | |
413 | struct rb_node *parent = NULL; | |
414 | struct ceph_inode_xattr *xattr = NULL; | |
415 | int c; | |
416 | int new = 0; | |
417 | ||
418 | p = &ci->i_xattrs.index.rb_node; | |
419 | while (*p) { | |
420 | parent = *p; | |
421 | xattr = rb_entry(parent, struct ceph_inode_xattr, node); | |
422 | c = strncmp(name, xattr->name, min(name_len, xattr->name_len)); | |
423 | if (c < 0) | |
424 | p = &(*p)->rb_left; | |
425 | else if (c > 0) | |
426 | p = &(*p)->rb_right; | |
427 | else { | |
428 | if (name_len == xattr->name_len) | |
429 | break; | |
430 | else if (name_len < xattr->name_len) | |
431 | p = &(*p)->rb_left; | |
432 | else | |
433 | p = &(*p)->rb_right; | |
434 | } | |
435 | xattr = NULL; | |
436 | } | |
437 | ||
fbc0b970 YZ |
438 | if (update_xattr) { |
439 | int err = 0; | |
eeca958d | 440 | |
fbc0b970 YZ |
441 | if (xattr && (flags & XATTR_CREATE)) |
442 | err = -EEXIST; | |
443 | else if (!xattr && (flags & XATTR_REPLACE)) | |
444 | err = -ENODATA; | |
445 | if (err) { | |
446 | kfree(name); | |
447 | kfree(val); | |
eeca958d | 448 | kfree(*newxattr); |
fbc0b970 YZ |
449 | return err; |
450 | } | |
bcdfeb2e YZ |
451 | if (update_xattr < 0) { |
452 | if (xattr) | |
453 | __remove_xattr(ci, xattr); | |
454 | kfree(name); | |
eeca958d | 455 | kfree(*newxattr); |
bcdfeb2e YZ |
456 | return 0; |
457 | } | |
fbc0b970 YZ |
458 | } |
459 | ||
355da1eb SW |
460 | if (!xattr) { |
461 | new = 1; | |
462 | xattr = *newxattr; | |
463 | xattr->name = name; | |
464 | xattr->name_len = name_len; | |
fbc0b970 | 465 | xattr->should_free_name = update_xattr; |
355da1eb SW |
466 | |
467 | ci->i_xattrs.count++; | |
468 | dout("__set_xattr count=%d\n", ci->i_xattrs.count); | |
469 | } else { | |
470 | kfree(*newxattr); | |
471 | *newxattr = NULL; | |
472 | if (xattr->should_free_val) | |
473 | kfree((void *)xattr->val); | |
474 | ||
fbc0b970 | 475 | if (update_xattr) { |
355da1eb SW |
476 | kfree((void *)name); |
477 | name = xattr->name; | |
478 | } | |
479 | ci->i_xattrs.names_size -= xattr->name_len; | |
480 | ci->i_xattrs.vals_size -= xattr->val_len; | |
481 | } | |
355da1eb SW |
482 | ci->i_xattrs.names_size += name_len; |
483 | ci->i_xattrs.vals_size += val_len; | |
484 | if (val) | |
485 | xattr->val = val; | |
486 | else | |
487 | xattr->val = ""; | |
488 | ||
489 | xattr->val_len = val_len; | |
fbc0b970 YZ |
490 | xattr->dirty = update_xattr; |
491 | xattr->should_free_val = (val && update_xattr); | |
355da1eb SW |
492 | |
493 | if (new) { | |
494 | rb_link_node(&xattr->node, parent, p); | |
495 | rb_insert_color(&xattr->node, &ci->i_xattrs.index); | |
496 | dout("__set_xattr_val p=%p\n", p); | |
497 | } | |
498 | ||
499 | dout("__set_xattr_val added %llx.%llx xattr %p %s=%.*s\n", | |
500 | ceph_vinop(&ci->vfs_inode), xattr, name, val_len, val); | |
501 | ||
502 | return 0; | |
503 | } | |
504 | ||
505 | static struct ceph_inode_xattr *__get_xattr(struct ceph_inode_info *ci, | |
506 | const char *name) | |
507 | { | |
508 | struct rb_node **p; | |
509 | struct rb_node *parent = NULL; | |
510 | struct ceph_inode_xattr *xattr = NULL; | |
17db143f | 511 | int name_len = strlen(name); |
355da1eb SW |
512 | int c; |
513 | ||
514 | p = &ci->i_xattrs.index.rb_node; | |
515 | while (*p) { | |
516 | parent = *p; | |
517 | xattr = rb_entry(parent, struct ceph_inode_xattr, node); | |
518 | c = strncmp(name, xattr->name, xattr->name_len); | |
17db143f SW |
519 | if (c == 0 && name_len > xattr->name_len) |
520 | c = 1; | |
355da1eb SW |
521 | if (c < 0) |
522 | p = &(*p)->rb_left; | |
523 | else if (c > 0) | |
524 | p = &(*p)->rb_right; | |
525 | else { | |
526 | dout("__get_xattr %s: found %.*s\n", name, | |
527 | xattr->val_len, xattr->val); | |
528 | return xattr; | |
529 | } | |
530 | } | |
531 | ||
532 | dout("__get_xattr %s: not found\n", name); | |
533 | ||
534 | return NULL; | |
535 | } | |
536 | ||
537 | static void __free_xattr(struct ceph_inode_xattr *xattr) | |
538 | { | |
539 | BUG_ON(!xattr); | |
540 | ||
541 | if (xattr->should_free_name) | |
542 | kfree((void *)xattr->name); | |
543 | if (xattr->should_free_val) | |
544 | kfree((void *)xattr->val); | |
545 | ||
546 | kfree(xattr); | |
547 | } | |
548 | ||
549 | static int __remove_xattr(struct ceph_inode_info *ci, | |
550 | struct ceph_inode_xattr *xattr) | |
551 | { | |
552 | if (!xattr) | |
524186ac | 553 | return -ENODATA; |
355da1eb SW |
554 | |
555 | rb_erase(&xattr->node, &ci->i_xattrs.index); | |
556 | ||
557 | if (xattr->should_free_name) | |
558 | kfree((void *)xattr->name); | |
559 | if (xattr->should_free_val) | |
560 | kfree((void *)xattr->val); | |
561 | ||
562 | ci->i_xattrs.names_size -= xattr->name_len; | |
563 | ci->i_xattrs.vals_size -= xattr->val_len; | |
564 | ci->i_xattrs.count--; | |
565 | kfree(xattr); | |
566 | ||
567 | return 0; | |
568 | } | |
569 | ||
355da1eb SW |
570 | static char *__copy_xattr_names(struct ceph_inode_info *ci, |
571 | char *dest) | |
572 | { | |
573 | struct rb_node *p; | |
574 | struct ceph_inode_xattr *xattr = NULL; | |
575 | ||
576 | p = rb_first(&ci->i_xattrs.index); | |
577 | dout("__copy_xattr_names count=%d\n", ci->i_xattrs.count); | |
578 | ||
579 | while (p) { | |
580 | xattr = rb_entry(p, struct ceph_inode_xattr, node); | |
581 | memcpy(dest, xattr->name, xattr->name_len); | |
582 | dest[xattr->name_len] = '\0'; | |
583 | ||
584 | dout("dest=%s %p (%s) (%d/%d)\n", dest, xattr, xattr->name, | |
585 | xattr->name_len, ci->i_xattrs.names_size); | |
586 | ||
587 | dest += xattr->name_len + 1; | |
588 | p = rb_next(p); | |
589 | } | |
590 | ||
591 | return dest; | |
592 | } | |
593 | ||
594 | void __ceph_destroy_xattrs(struct ceph_inode_info *ci) | |
595 | { | |
596 | struct rb_node *p, *tmp; | |
597 | struct ceph_inode_xattr *xattr = NULL; | |
598 | ||
599 | p = rb_first(&ci->i_xattrs.index); | |
600 | ||
601 | dout("__ceph_destroy_xattrs p=%p\n", p); | |
602 | ||
603 | while (p) { | |
604 | xattr = rb_entry(p, struct ceph_inode_xattr, node); | |
605 | tmp = p; | |
606 | p = rb_next(tmp); | |
607 | dout("__ceph_destroy_xattrs next p=%p (%.*s)\n", p, | |
608 | xattr->name_len, xattr->name); | |
609 | rb_erase(tmp, &ci->i_xattrs.index); | |
610 | ||
611 | __free_xattr(xattr); | |
612 | } | |
613 | ||
614 | ci->i_xattrs.names_size = 0; | |
615 | ci->i_xattrs.vals_size = 0; | |
616 | ci->i_xattrs.index_version = 0; | |
617 | ci->i_xattrs.count = 0; | |
618 | ci->i_xattrs.index = RB_ROOT; | |
619 | } | |
620 | ||
621 | static int __build_xattrs(struct inode *inode) | |
be655596 SW |
622 | __releases(ci->i_ceph_lock) |
623 | __acquires(ci->i_ceph_lock) | |
355da1eb SW |
624 | { |
625 | u32 namelen; | |
626 | u32 numattr = 0; | |
627 | void *p, *end; | |
628 | u32 len; | |
629 | const char *name, *val; | |
630 | struct ceph_inode_info *ci = ceph_inode(inode); | |
631 | int xattr_version; | |
632 | struct ceph_inode_xattr **xattrs = NULL; | |
63ff78b2 | 633 | int err = 0; |
355da1eb SW |
634 | int i; |
635 | ||
636 | dout("__build_xattrs() len=%d\n", | |
637 | ci->i_xattrs.blob ? (int)ci->i_xattrs.blob->vec.iov_len : 0); | |
638 | ||
639 | if (ci->i_xattrs.index_version >= ci->i_xattrs.version) | |
640 | return 0; /* already built */ | |
641 | ||
642 | __ceph_destroy_xattrs(ci); | |
643 | ||
644 | start: | |
645 | /* updated internal xattr rb tree */ | |
646 | if (ci->i_xattrs.blob && ci->i_xattrs.blob->vec.iov_len > 4) { | |
647 | p = ci->i_xattrs.blob->vec.iov_base; | |
648 | end = p + ci->i_xattrs.blob->vec.iov_len; | |
649 | ceph_decode_32_safe(&p, end, numattr, bad); | |
650 | xattr_version = ci->i_xattrs.version; | |
be655596 | 651 | spin_unlock(&ci->i_ceph_lock); |
355da1eb | 652 | |
7e8a2952 | 653 | xattrs = kcalloc(numattr, sizeof(struct ceph_inode_xattr *), |
355da1eb SW |
654 | GFP_NOFS); |
655 | err = -ENOMEM; | |
656 | if (!xattrs) | |
657 | goto bad_lock; | |
1a295bd8 | 658 | |
355da1eb SW |
659 | for (i = 0; i < numattr; i++) { |
660 | xattrs[i] = kmalloc(sizeof(struct ceph_inode_xattr), | |
661 | GFP_NOFS); | |
662 | if (!xattrs[i]) | |
663 | goto bad_lock; | |
664 | } | |
665 | ||
be655596 | 666 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
667 | if (ci->i_xattrs.version != xattr_version) { |
668 | /* lost a race, retry */ | |
669 | for (i = 0; i < numattr; i++) | |
670 | kfree(xattrs[i]); | |
671 | kfree(xattrs); | |
21ec6ffa | 672 | xattrs = NULL; |
355da1eb SW |
673 | goto start; |
674 | } | |
675 | err = -EIO; | |
676 | while (numattr--) { | |
677 | ceph_decode_32_safe(&p, end, len, bad); | |
678 | namelen = len; | |
679 | name = p; | |
680 | p += len; | |
681 | ceph_decode_32_safe(&p, end, len, bad); | |
682 | val = p; | |
683 | p += len; | |
684 | ||
685 | err = __set_xattr(ci, name, namelen, val, len, | |
fbc0b970 | 686 | 0, 0, &xattrs[numattr]); |
355da1eb SW |
687 | |
688 | if (err < 0) | |
689 | goto bad; | |
690 | } | |
691 | kfree(xattrs); | |
692 | } | |
693 | ci->i_xattrs.index_version = ci->i_xattrs.version; | |
694 | ci->i_xattrs.dirty = false; | |
695 | ||
696 | return err; | |
697 | bad_lock: | |
be655596 | 698 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
699 | bad: |
700 | if (xattrs) { | |
701 | for (i = 0; i < numattr; i++) | |
702 | kfree(xattrs[i]); | |
703 | kfree(xattrs); | |
704 | } | |
705 | ci->i_xattrs.names_size = 0; | |
706 | return err; | |
707 | } | |
708 | ||
709 | static int __get_required_blob_size(struct ceph_inode_info *ci, int name_size, | |
710 | int val_size) | |
711 | { | |
712 | /* | |
713 | * 4 bytes for the length, and additional 4 bytes per each xattr name, | |
714 | * 4 bytes per each value | |
715 | */ | |
716 | int size = 4 + ci->i_xattrs.count*(4 + 4) + | |
717 | ci->i_xattrs.names_size + | |
718 | ci->i_xattrs.vals_size; | |
719 | dout("__get_required_blob_size c=%d names.size=%d vals.size=%d\n", | |
720 | ci->i_xattrs.count, ci->i_xattrs.names_size, | |
721 | ci->i_xattrs.vals_size); | |
722 | ||
723 | if (name_size) | |
724 | size += 4 + 4 + name_size + val_size; | |
725 | ||
726 | return size; | |
727 | } | |
728 | ||
729 | /* | |
730 | * If there are dirty xattrs, reencode xattrs into the prealloc_blob | |
731 | * and swap into place. | |
732 | */ | |
733 | void __ceph_build_xattrs_blob(struct ceph_inode_info *ci) | |
734 | { | |
735 | struct rb_node *p; | |
736 | struct ceph_inode_xattr *xattr = NULL; | |
737 | void *dest; | |
738 | ||
739 | dout("__build_xattrs_blob %p\n", &ci->vfs_inode); | |
740 | if (ci->i_xattrs.dirty) { | |
741 | int need = __get_required_blob_size(ci, 0, 0); | |
742 | ||
743 | BUG_ON(need > ci->i_xattrs.prealloc_blob->alloc_len); | |
744 | ||
745 | p = rb_first(&ci->i_xattrs.index); | |
746 | dest = ci->i_xattrs.prealloc_blob->vec.iov_base; | |
747 | ||
748 | ceph_encode_32(&dest, ci->i_xattrs.count); | |
749 | while (p) { | |
750 | xattr = rb_entry(p, struct ceph_inode_xattr, node); | |
751 | ||
752 | ceph_encode_32(&dest, xattr->name_len); | |
753 | memcpy(dest, xattr->name, xattr->name_len); | |
754 | dest += xattr->name_len; | |
755 | ceph_encode_32(&dest, xattr->val_len); | |
756 | memcpy(dest, xattr->val, xattr->val_len); | |
757 | dest += xattr->val_len; | |
758 | ||
759 | p = rb_next(p); | |
760 | } | |
761 | ||
762 | /* adjust buffer len; it may be larger than we need */ | |
763 | ci->i_xattrs.prealloc_blob->vec.iov_len = | |
764 | dest - ci->i_xattrs.prealloc_blob->vec.iov_base; | |
765 | ||
b6c1d5b8 SW |
766 | if (ci->i_xattrs.blob) |
767 | ceph_buffer_put(ci->i_xattrs.blob); | |
355da1eb SW |
768 | ci->i_xattrs.blob = ci->i_xattrs.prealloc_blob; |
769 | ci->i_xattrs.prealloc_blob = NULL; | |
770 | ci->i_xattrs.dirty = false; | |
4a625be4 | 771 | ci->i_xattrs.version++; |
355da1eb SW |
772 | } |
773 | } | |
774 | ||
315f2408 YZ |
775 | static inline int __get_request_mask(struct inode *in) { |
776 | struct ceph_mds_request *req = current->journal_info; | |
777 | int mask = 0; | |
778 | if (req && req->r_target_inode == in) { | |
779 | if (req->r_op == CEPH_MDS_OP_LOOKUP || | |
780 | req->r_op == CEPH_MDS_OP_LOOKUPINO || | |
781 | req->r_op == CEPH_MDS_OP_LOOKUPPARENT || | |
782 | req->r_op == CEPH_MDS_OP_GETATTR) { | |
783 | mask = le32_to_cpu(req->r_args.getattr.mask); | |
784 | } else if (req->r_op == CEPH_MDS_OP_OPEN || | |
785 | req->r_op == CEPH_MDS_OP_CREATE) { | |
786 | mask = le32_to_cpu(req->r_args.open.mask); | |
787 | } | |
788 | } | |
789 | return mask; | |
790 | } | |
791 | ||
7221fe4c | 792 | ssize_t __ceph_getxattr(struct inode *inode, const char *name, void *value, |
355da1eb SW |
793 | size_t size) |
794 | { | |
355da1eb | 795 | struct ceph_inode_info *ci = ceph_inode(inode); |
355da1eb | 796 | struct ceph_inode_xattr *xattr; |
881a5fa2 | 797 | struct ceph_vxattr *vxattr = NULL; |
315f2408 YZ |
798 | int req_mask; |
799 | int err; | |
355da1eb | 800 | |
0bee82fb SW |
801 | /* let's see if a virtual xattr was requested */ |
802 | vxattr = ceph_match_vxattr(inode, name); | |
29dccfa5 | 803 | if (vxattr) { |
1684dd03 YZ |
804 | err = ceph_do_getattr(inode, 0, true); |
805 | if (err) | |
806 | return err; | |
29dccfa5 YZ |
807 | err = -ENODATA; |
808 | if (!(vxattr->exists_cb && !vxattr->exists_cb(ci))) | |
809 | err = vxattr->getxattr_cb(ci, value, size); | |
a1dc1937 | 810 | return err; |
0bee82fb SW |
811 | } |
812 | ||
315f2408 YZ |
813 | req_mask = __get_request_mask(inode); |
814 | ||
a1dc1937 | 815 | spin_lock(&ci->i_ceph_lock); |
816 | dout("getxattr %p ver=%lld index_ver=%lld\n", inode, | |
817 | ci->i_xattrs.version, ci->i_xattrs.index_version); | |
818 | ||
508b32d8 | 819 | if (ci->i_xattrs.version == 0 || |
315f2408 YZ |
820 | !((req_mask & CEPH_CAP_XATTR_SHARED) || |
821 | __ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 1))) { | |
be655596 | 822 | spin_unlock(&ci->i_ceph_lock); |
315f2408 YZ |
823 | |
824 | /* security module gets xattr while filling trace */ | |
d37b1d99 | 825 | if (current->journal_info) { |
315f2408 YZ |
826 | pr_warn_ratelimited("sync getxattr %p " |
827 | "during filling trace\n", inode); | |
828 | return -EBUSY; | |
829 | } | |
830 | ||
355da1eb | 831 | /* get xattrs from mds (if we don't already have them) */ |
508b32d8 | 832 | err = ceph_do_getattr(inode, CEPH_STAT_CAP_XATTR, true); |
355da1eb SW |
833 | if (err) |
834 | return err; | |
508b32d8 | 835 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
836 | } |
837 | ||
355da1eb SW |
838 | err = __build_xattrs(inode); |
839 | if (err < 0) | |
840 | goto out; | |
841 | ||
355da1eb SW |
842 | err = -ENODATA; /* == ENOATTR */ |
843 | xattr = __get_xattr(ci, name); | |
0bee82fb | 844 | if (!xattr) |
355da1eb | 845 | goto out; |
355da1eb SW |
846 | |
847 | err = -ERANGE; | |
848 | if (size && size < xattr->val_len) | |
849 | goto out; | |
850 | ||
851 | err = xattr->val_len; | |
852 | if (size == 0) | |
853 | goto out; | |
854 | ||
855 | memcpy(value, xattr->val, xattr->val_len); | |
856 | ||
d37b1d99 | 857 | if (current->journal_info && |
315f2408 YZ |
858 | !strncmp(name, XATTR_SECURITY_PREFIX, XATTR_SECURITY_PREFIX_LEN)) |
859 | ci->i_ceph_flags |= CEPH_I_SEC_INITED; | |
355da1eb | 860 | out: |
be655596 | 861 | spin_unlock(&ci->i_ceph_lock); |
355da1eb SW |
862 | return err; |
863 | } | |
864 | ||
865 | ssize_t ceph_listxattr(struct dentry *dentry, char *names, size_t size) | |
866 | { | |
2b0143b5 | 867 | struct inode *inode = d_inode(dentry); |
355da1eb | 868 | struct ceph_inode_info *ci = ceph_inode(inode); |
881a5fa2 | 869 | struct ceph_vxattr *vxattrs = ceph_inode_vxattrs(inode); |
355da1eb SW |
870 | u32 vir_namelen = 0; |
871 | u32 namelen; | |
872 | int err; | |
873 | u32 len; | |
874 | int i; | |
875 | ||
be655596 | 876 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
877 | dout("listxattr %p ver=%lld index_ver=%lld\n", inode, |
878 | ci->i_xattrs.version, ci->i_xattrs.index_version); | |
879 | ||
508b32d8 YZ |
880 | if (ci->i_xattrs.version == 0 || |
881 | !__ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 1)) { | |
be655596 | 882 | spin_unlock(&ci->i_ceph_lock); |
508b32d8 | 883 | err = ceph_do_getattr(inode, CEPH_STAT_CAP_XATTR, true); |
355da1eb SW |
884 | if (err) |
885 | return err; | |
508b32d8 | 886 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
887 | } |
888 | ||
355da1eb SW |
889 | err = __build_xattrs(inode); |
890 | if (err < 0) | |
891 | goto out; | |
3ce6cd12 AE |
892 | /* |
893 | * Start with virtual dir xattr names (if any) (including | |
894 | * terminating '\0' characters for each). | |
895 | */ | |
896 | vir_namelen = ceph_vxattrs_name_size(vxattrs); | |
897 | ||
355da1eb | 898 | /* adding 1 byte per each variable due to the null termination */ |
b65917dd | 899 | namelen = ci->i_xattrs.names_size + ci->i_xattrs.count; |
355da1eb | 900 | err = -ERANGE; |
b65917dd | 901 | if (size && vir_namelen + namelen > size) |
355da1eb SW |
902 | goto out; |
903 | ||
b65917dd | 904 | err = namelen + vir_namelen; |
355da1eb SW |
905 | if (size == 0) |
906 | goto out; | |
907 | ||
908 | names = __copy_xattr_names(ci, names); | |
909 | ||
910 | /* virtual xattr names, too */ | |
b65917dd SW |
911 | err = namelen; |
912 | if (vxattrs) { | |
355da1eb | 913 | for (i = 0; vxattrs[i].name; i++) { |
b65917dd SW |
914 | if (!vxattrs[i].hidden && |
915 | !(vxattrs[i].exists_cb && | |
916 | !vxattrs[i].exists_cb(ci))) { | |
917 | len = sprintf(names, "%s", vxattrs[i].name); | |
918 | names += len + 1; | |
919 | err += len + 1; | |
920 | } | |
355da1eb | 921 | } |
b65917dd | 922 | } |
355da1eb SW |
923 | |
924 | out: | |
be655596 | 925 | spin_unlock(&ci->i_ceph_lock); |
355da1eb SW |
926 | return err; |
927 | } | |
928 | ||
a26fecca | 929 | static int ceph_sync_setxattr(struct inode *inode, const char *name, |
355da1eb SW |
930 | const char *value, size_t size, int flags) |
931 | { | |
a26fecca | 932 | struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb); |
355da1eb | 933 | struct ceph_inode_info *ci = ceph_inode(inode); |
355da1eb | 934 | struct ceph_mds_request *req; |
3d14c5d2 | 935 | struct ceph_mds_client *mdsc = fsc->mdsc; |
25e6bae3 | 936 | struct ceph_pagelist *pagelist = NULL; |
04303d8a | 937 | int op = CEPH_MDS_OP_SETXATTR; |
355da1eb | 938 | int err; |
25e6bae3 | 939 | |
0aeff37a | 940 | if (size > 0) { |
25e6bae3 YZ |
941 | /* copy value into pagelist */ |
942 | pagelist = kmalloc(sizeof(*pagelist), GFP_NOFS); | |
943 | if (!pagelist) | |
355da1eb | 944 | return -ENOMEM; |
25e6bae3 YZ |
945 | |
946 | ceph_pagelist_init(pagelist); | |
947 | err = ceph_pagelist_append(pagelist, value, size); | |
948 | if (err) | |
949 | goto out; | |
0aeff37a | 950 | } else if (!value) { |
04303d8a YZ |
951 | if (flags & CEPH_XATTR_REPLACE) |
952 | op = CEPH_MDS_OP_RMXATTR; | |
953 | else | |
954 | flags |= CEPH_XATTR_REMOVE; | |
355da1eb SW |
955 | } |
956 | ||
957 | dout("setxattr value=%.*s\n", (int)size, value); | |
958 | ||
959 | /* do request */ | |
04303d8a | 960 | req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS); |
60d87733 JL |
961 | if (IS_ERR(req)) { |
962 | err = PTR_ERR(req); | |
963 | goto out; | |
964 | } | |
a149bb9a | 965 | |
355da1eb | 966 | req->r_path2 = kstrdup(name, GFP_NOFS); |
a149bb9a SK |
967 | if (!req->r_path2) { |
968 | ceph_mdsc_put_request(req); | |
969 | err = -ENOMEM; | |
970 | goto out; | |
971 | } | |
355da1eb | 972 | |
04303d8a YZ |
973 | if (op == CEPH_MDS_OP_SETXATTR) { |
974 | req->r_args.setxattr.flags = cpu_to_le32(flags); | |
975 | req->r_pagelist = pagelist; | |
976 | pagelist = NULL; | |
977 | } | |
355da1eb | 978 | |
a149bb9a SK |
979 | req->r_inode = inode; |
980 | ihold(inode); | |
981 | req->r_num_caps = 1; | |
982 | req->r_inode_drop = CEPH_CAP_XATTR_SHARED; | |
983 | ||
355da1eb | 984 | dout("xattr.ver (before): %lld\n", ci->i_xattrs.version); |
752c8bdc | 985 | err = ceph_mdsc_do_request(mdsc, NULL, req); |
355da1eb SW |
986 | ceph_mdsc_put_request(req); |
987 | dout("xattr.ver (after): %lld\n", ci->i_xattrs.version); | |
988 | ||
989 | out: | |
25e6bae3 YZ |
990 | if (pagelist) |
991 | ceph_pagelist_release(pagelist); | |
355da1eb SW |
992 | return err; |
993 | } | |
994 | ||
a26fecca | 995 | int __ceph_setxattr(struct inode *inode, const char *name, |
7221fe4c | 996 | const void *value, size_t size, int flags) |
355da1eb | 997 | { |
881a5fa2 | 998 | struct ceph_vxattr *vxattr; |
355da1eb | 999 | struct ceph_inode_info *ci = ceph_inode(inode); |
a26fecca | 1000 | struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc; |
f66fd9f0 | 1001 | struct ceph_cap_flush *prealloc_cf = NULL; |
18fa8b3f | 1002 | int issued; |
355da1eb | 1003 | int err; |
fbc0b970 | 1004 | int dirty = 0; |
355da1eb SW |
1005 | int name_len = strlen(name); |
1006 | int val_len = size; | |
1007 | char *newname = NULL; | |
1008 | char *newval = NULL; | |
1009 | struct ceph_inode_xattr *xattr = NULL; | |
355da1eb | 1010 | int required_blob_size; |
604d1b02 | 1011 | bool lock_snap_rwsem = false; |
355da1eb | 1012 | |
2cdeb1e4 AG |
1013 | if (ceph_snap(inode) != CEPH_NOSNAP) |
1014 | return -EROFS; | |
355da1eb | 1015 | |
06476a69 AE |
1016 | vxattr = ceph_match_vxattr(inode, name); |
1017 | if (vxattr && vxattr->readonly) | |
1018 | return -EOPNOTSUPP; | |
355da1eb | 1019 | |
3adf654d SW |
1020 | /* pass any unhandled ceph.* xattrs through to the MDS */ |
1021 | if (!strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN)) | |
1022 | goto do_sync_unlocked; | |
1023 | ||
355da1eb SW |
1024 | /* preallocate memory for xattr name, value, index node */ |
1025 | err = -ENOMEM; | |
61413c2f | 1026 | newname = kmemdup(name, name_len + 1, GFP_NOFS); |
355da1eb SW |
1027 | if (!newname) |
1028 | goto out; | |
355da1eb SW |
1029 | |
1030 | if (val_len) { | |
b829c195 | 1031 | newval = kmemdup(value, val_len, GFP_NOFS); |
355da1eb SW |
1032 | if (!newval) |
1033 | goto out; | |
355da1eb SW |
1034 | } |
1035 | ||
1036 | xattr = kmalloc(sizeof(struct ceph_inode_xattr), GFP_NOFS); | |
1037 | if (!xattr) | |
1038 | goto out; | |
1039 | ||
f66fd9f0 YZ |
1040 | prealloc_cf = ceph_alloc_cap_flush(); |
1041 | if (!prealloc_cf) | |
1042 | goto out; | |
1043 | ||
be655596 | 1044 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
1045 | retry: |
1046 | issued = __ceph_caps_issued(ci, NULL); | |
508b32d8 | 1047 | if (ci->i_xattrs.version == 0 || !(issued & CEPH_CAP_XATTR_EXCL)) |
355da1eb | 1048 | goto do_sync; |
604d1b02 YZ |
1049 | |
1050 | if (!lock_snap_rwsem && !ci->i_head_snapc) { | |
1051 | lock_snap_rwsem = true; | |
1052 | if (!down_read_trylock(&mdsc->snap_rwsem)) { | |
1053 | spin_unlock(&ci->i_ceph_lock); | |
1054 | down_read(&mdsc->snap_rwsem); | |
1055 | spin_lock(&ci->i_ceph_lock); | |
1056 | goto retry; | |
1057 | } | |
1058 | } | |
1059 | ||
1060 | dout("setxattr %p issued %s\n", inode, ceph_cap_string(issued)); | |
355da1eb SW |
1061 | __build_xattrs(inode); |
1062 | ||
1063 | required_blob_size = __get_required_blob_size(ci, name_len, val_len); | |
1064 | ||
1065 | if (!ci->i_xattrs.prealloc_blob || | |
1066 | required_blob_size > ci->i_xattrs.prealloc_blob->alloc_len) { | |
18fa8b3f | 1067 | struct ceph_buffer *blob; |
355da1eb | 1068 | |
be655596 | 1069 | spin_unlock(&ci->i_ceph_lock); |
355da1eb | 1070 | dout(" preaallocating new blob size=%d\n", required_blob_size); |
b6c1d5b8 | 1071 | blob = ceph_buffer_new(required_blob_size, GFP_NOFS); |
355da1eb | 1072 | if (!blob) |
604d1b02 | 1073 | goto do_sync_unlocked; |
be655596 | 1074 | spin_lock(&ci->i_ceph_lock); |
b6c1d5b8 SW |
1075 | if (ci->i_xattrs.prealloc_blob) |
1076 | ceph_buffer_put(ci->i_xattrs.prealloc_blob); | |
355da1eb SW |
1077 | ci->i_xattrs.prealloc_blob = blob; |
1078 | goto retry; | |
1079 | } | |
1080 | ||
bcdfeb2e YZ |
1081 | err = __set_xattr(ci, newname, name_len, newval, val_len, |
1082 | flags, value ? 1 : -1, &xattr); | |
18fa8b3f | 1083 | |
fbc0b970 | 1084 | if (!err) { |
f66fd9f0 YZ |
1085 | dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_XATTR_EXCL, |
1086 | &prealloc_cf); | |
fbc0b970 | 1087 | ci->i_xattrs.dirty = true; |
c2050a45 | 1088 | inode->i_ctime = current_time(inode); |
fbc0b970 | 1089 | } |
18fa8b3f | 1090 | |
be655596 | 1091 | spin_unlock(&ci->i_ceph_lock); |
604d1b02 YZ |
1092 | if (lock_snap_rwsem) |
1093 | up_read(&mdsc->snap_rwsem); | |
fca65b4a SW |
1094 | if (dirty) |
1095 | __mark_inode_dirty(inode, dirty); | |
f66fd9f0 | 1096 | ceph_free_cap_flush(prealloc_cf); |
355da1eb SW |
1097 | return err; |
1098 | ||
1099 | do_sync: | |
be655596 | 1100 | spin_unlock(&ci->i_ceph_lock); |
3adf654d | 1101 | do_sync_unlocked: |
604d1b02 YZ |
1102 | if (lock_snap_rwsem) |
1103 | up_read(&mdsc->snap_rwsem); | |
315f2408 YZ |
1104 | |
1105 | /* security module set xattr while filling trace */ | |
d37b1d99 | 1106 | if (current->journal_info) { |
315f2408 YZ |
1107 | pr_warn_ratelimited("sync setxattr %p " |
1108 | "during filling trace\n", inode); | |
1109 | err = -EBUSY; | |
1110 | } else { | |
a26fecca | 1111 | err = ceph_sync_setxattr(inode, name, value, size, flags); |
315f2408 | 1112 | } |
355da1eb | 1113 | out: |
f66fd9f0 | 1114 | ceph_free_cap_flush(prealloc_cf); |
355da1eb SW |
1115 | kfree(newname); |
1116 | kfree(newval); | |
1117 | kfree(xattr); | |
1118 | return err; | |
1119 | } | |
1120 | ||
2cdeb1e4 AG |
1121 | static int ceph_get_xattr_handler(const struct xattr_handler *handler, |
1122 | struct dentry *dentry, struct inode *inode, | |
1123 | const char *name, void *value, size_t size) | |
7221fe4c | 1124 | { |
2cdeb1e4 AG |
1125 | if (!ceph_is_valid_xattr(name)) |
1126 | return -EOPNOTSUPP; | |
1127 | return __ceph_getxattr(inode, name, value, size); | |
1128 | } | |
7221fe4c | 1129 | |
2cdeb1e4 | 1130 | static int ceph_set_xattr_handler(const struct xattr_handler *handler, |
59301226 AV |
1131 | struct dentry *unused, struct inode *inode, |
1132 | const char *name, const void *value, | |
1133 | size_t size, int flags) | |
2cdeb1e4 AG |
1134 | { |
1135 | if (!ceph_is_valid_xattr(name)) | |
1136 | return -EOPNOTSUPP; | |
59301226 | 1137 | return __ceph_setxattr(inode, name, value, size, flags); |
7221fe4c | 1138 | } |
315f2408 | 1139 | |
5130ccea | 1140 | static const struct xattr_handler ceph_other_xattr_handler = { |
2cdeb1e4 AG |
1141 | .prefix = "", /* match any name => handlers called with full name */ |
1142 | .get = ceph_get_xattr_handler, | |
1143 | .set = ceph_set_xattr_handler, | |
1144 | }; | |
1145 | ||
315f2408 YZ |
1146 | #ifdef CONFIG_SECURITY |
1147 | bool ceph_security_xattr_wanted(struct inode *in) | |
1148 | { | |
1149 | return in->i_security != NULL; | |
1150 | } | |
1151 | ||
1152 | bool ceph_security_xattr_deadlock(struct inode *in) | |
1153 | { | |
1154 | struct ceph_inode_info *ci; | |
1155 | bool ret; | |
d37b1d99 | 1156 | if (!in->i_security) |
315f2408 YZ |
1157 | return false; |
1158 | ci = ceph_inode(in); | |
1159 | spin_lock(&ci->i_ceph_lock); | |
1160 | ret = !(ci->i_ceph_flags & CEPH_I_SEC_INITED) && | |
1161 | !(ci->i_xattrs.version > 0 && | |
1162 | __ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 0)); | |
1163 | spin_unlock(&ci->i_ceph_lock); | |
1164 | return ret; | |
1165 | } | |
1166 | #endif |