Commit | Line | Data |
---|---|---|
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); | |
f36e4472 | 53 | bool (*exists_cb)(struct ceph_inode_info *ci); |
4e9906e7 | 54 | unsigned int flags; |
355da1eb SW |
55 | }; |
56 | ||
4e9906e7 YZ |
57 | #define VXATTR_FLAG_READONLY (1<<0) |
58 | #define VXATTR_FLAG_HIDDEN (1<<1) | |
49a9f4f6 | 59 | #define VXATTR_FLAG_RSTAT (1<<2) |
4e9906e7 | 60 | |
32ab0bd7 SW |
61 | /* layouts */ |
62 | ||
63 | static bool ceph_vxattrcb_layout_exists(struct ceph_inode_info *ci) | |
64 | { | |
779fe0fb YZ |
65 | struct ceph_file_layout *fl = &ci->i_layout; |
66 | return (fl->stripe_unit > 0 || fl->stripe_count > 0 || | |
67 | fl->object_size > 0 || fl->pool_id >= 0 || | |
68 | rcu_dereference_raw(fl->pool_ns) != NULL); | |
32ab0bd7 SW |
69 | } |
70 | ||
71 | static size_t ceph_vxattrcb_layout(struct ceph_inode_info *ci, char *val, | |
1e5c6649 | 72 | size_t size) |
32ab0bd7 | 73 | { |
32ab0bd7 SW |
74 | struct ceph_fs_client *fsc = ceph_sb_to_client(ci->vfs_inode.i_sb); |
75 | struct ceph_osd_client *osdc = &fsc->client->osdc; | |
779fe0fb | 76 | struct ceph_string *pool_ns; |
7627151e | 77 | s64 pool = ci->i_layout.pool_id; |
32ab0bd7 | 78 | const char *pool_name; |
779fe0fb | 79 | const char *ns_field = " pool_namespace="; |
1e5c6649 | 80 | char buf[128]; |
779fe0fb YZ |
81 | size_t len, total_len = 0; |
82 | int ret; | |
83 | ||
84 | pool_ns = ceph_try_get_string(ci->i_layout.pool_ns); | |
32ab0bd7 SW |
85 | |
86 | dout("ceph_vxattrcb_layout %p\n", &ci->vfs_inode); | |
5aea3dcd | 87 | down_read(&osdc->lock); |
32ab0bd7 | 88 | pool_name = ceph_pg_pool_name_by_id(osdc->osdmap, pool); |
1e5c6649 | 89 | if (pool_name) { |
779fe0fb | 90 | len = snprintf(buf, sizeof(buf), |
7627151e YZ |
91 | "stripe_unit=%u stripe_count=%u object_size=%u pool=", |
92 | ci->i_layout.stripe_unit, ci->i_layout.stripe_count, | |
93 | ci->i_layout.object_size); | |
779fe0fb | 94 | total_len = len + strlen(pool_name); |
1e5c6649 | 95 | } else { |
779fe0fb | 96 | len = snprintf(buf, sizeof(buf), |
7627151e YZ |
97 | "stripe_unit=%u stripe_count=%u object_size=%u pool=%lld", |
98 | ci->i_layout.stripe_unit, ci->i_layout.stripe_count, | |
99 | ci->i_layout.object_size, (unsigned long long)pool); | |
779fe0fb YZ |
100 | total_len = len; |
101 | } | |
102 | ||
103 | if (pool_ns) | |
104 | total_len += strlen(ns_field) + pool_ns->len; | |
105 | ||
106 | if (!size) { | |
107 | ret = total_len; | |
108 | } else if (total_len > size) { | |
109 | ret = -ERANGE; | |
110 | } else { | |
111 | memcpy(val, buf, len); | |
112 | ret = len; | |
113 | if (pool_name) { | |
114 | len = strlen(pool_name); | |
115 | memcpy(val + ret, pool_name, len); | |
116 | ret += len; | |
117 | } | |
118 | if (pool_ns) { | |
119 | len = strlen(ns_field); | |
120 | memcpy(val + ret, ns_field, len); | |
121 | ret += len; | |
122 | memcpy(val + ret, pool_ns->str, pool_ns->len); | |
123 | ret += pool_ns->len; | |
1e5c6649 YZ |
124 | } |
125 | } | |
5aea3dcd | 126 | up_read(&osdc->lock); |
779fe0fb | 127 | ceph_put_string(pool_ns); |
32ab0bd7 SW |
128 | return ret; |
129 | } | |
130 | ||
695b7119 SW |
131 | static size_t ceph_vxattrcb_layout_stripe_unit(struct ceph_inode_info *ci, |
132 | char *val, size_t size) | |
133 | { | |
7627151e | 134 | return snprintf(val, size, "%u", ci->i_layout.stripe_unit); |
695b7119 SW |
135 | } |
136 | ||
137 | static size_t ceph_vxattrcb_layout_stripe_count(struct ceph_inode_info *ci, | |
138 | char *val, size_t size) | |
139 | { | |
7627151e | 140 | return snprintf(val, size, "%u", ci->i_layout.stripe_count); |
695b7119 SW |
141 | } |
142 | ||
143 | static size_t ceph_vxattrcb_layout_object_size(struct ceph_inode_info *ci, | |
144 | char *val, size_t size) | |
145 | { | |
7627151e | 146 | return snprintf(val, size, "%u", ci->i_layout.object_size); |
695b7119 SW |
147 | } |
148 | ||
149 | static size_t ceph_vxattrcb_layout_pool(struct ceph_inode_info *ci, | |
150 | char *val, size_t size) | |
151 | { | |
152 | int ret; | |
153 | struct ceph_fs_client *fsc = ceph_sb_to_client(ci->vfs_inode.i_sb); | |
154 | struct ceph_osd_client *osdc = &fsc->client->osdc; | |
7627151e | 155 | s64 pool = ci->i_layout.pool_id; |
695b7119 SW |
156 | const char *pool_name; |
157 | ||
5aea3dcd | 158 | down_read(&osdc->lock); |
695b7119 SW |
159 | pool_name = ceph_pg_pool_name_by_id(osdc->osdmap, pool); |
160 | if (pool_name) | |
161 | ret = snprintf(val, size, "%s", pool_name); | |
162 | else | |
163 | ret = snprintf(val, size, "%lld", (unsigned long long)pool); | |
5aea3dcd | 164 | up_read(&osdc->lock); |
695b7119 SW |
165 | return ret; |
166 | } | |
167 | ||
779fe0fb YZ |
168 | static size_t ceph_vxattrcb_layout_pool_namespace(struct ceph_inode_info *ci, |
169 | char *val, size_t size) | |
170 | { | |
171 | int ret = 0; | |
172 | struct ceph_string *ns = ceph_try_get_string(ci->i_layout.pool_ns); | |
173 | if (ns) { | |
174 | ret = snprintf(val, size, "%.*s", (int)ns->len, ns->str); | |
175 | ceph_put_string(ns); | |
176 | } | |
177 | return ret; | |
178 | } | |
179 | ||
355da1eb SW |
180 | /* directories */ |
181 | ||
aa4066ed | 182 | static size_t ceph_vxattrcb_dir_entries(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
183 | size_t size) |
184 | { | |
185 | return snprintf(val, size, "%lld", ci->i_files + ci->i_subdirs); | |
186 | } | |
187 | ||
aa4066ed | 188 | static size_t ceph_vxattrcb_dir_files(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
189 | size_t size) |
190 | { | |
191 | return snprintf(val, size, "%lld", ci->i_files); | |
192 | } | |
193 | ||
aa4066ed | 194 | static size_t ceph_vxattrcb_dir_subdirs(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
195 | size_t size) |
196 | { | |
197 | return snprintf(val, size, "%lld", ci->i_subdirs); | |
198 | } | |
199 | ||
aa4066ed | 200 | static size_t ceph_vxattrcb_dir_rentries(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
201 | size_t size) |
202 | { | |
203 | return snprintf(val, size, "%lld", ci->i_rfiles + ci->i_rsubdirs); | |
204 | } | |
205 | ||
aa4066ed | 206 | static size_t ceph_vxattrcb_dir_rfiles(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
207 | size_t size) |
208 | { | |
209 | return snprintf(val, size, "%lld", ci->i_rfiles); | |
210 | } | |
211 | ||
aa4066ed | 212 | static size_t ceph_vxattrcb_dir_rsubdirs(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
213 | size_t size) |
214 | { | |
215 | return snprintf(val, size, "%lld", ci->i_rsubdirs); | |
216 | } | |
217 | ||
aa4066ed | 218 | static size_t ceph_vxattrcb_dir_rbytes(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
219 | size_t size) |
220 | { | |
221 | return snprintf(val, size, "%lld", ci->i_rbytes); | |
222 | } | |
223 | ||
aa4066ed | 224 | static size_t ceph_vxattrcb_dir_rctime(struct ceph_inode_info *ci, char *val, |
355da1eb SW |
225 | size_t size) |
226 | { | |
9bbeab41 AB |
227 | return snprintf(val, size, "%lld.09%ld", ci->i_rctime.tv_sec, |
228 | ci->i_rctime.tv_nsec); | |
355da1eb SW |
229 | } |
230 | ||
08796873 YZ |
231 | /* dir pin */ |
232 | static bool ceph_vxattrcb_dir_pin_exists(struct ceph_inode_info *ci) | |
233 | { | |
234 | return ci->i_dir_pin != -ENODATA; | |
235 | } | |
236 | ||
237 | static size_t ceph_vxattrcb_dir_pin(struct ceph_inode_info *ci, char *val, | |
238 | size_t size) | |
239 | { | |
240 | return snprintf(val, size, "%d", (int)ci->i_dir_pin); | |
241 | } | |
fb18a575 | 242 | |
08796873 | 243 | /* quotas */ |
fb18a575 LH |
244 | static bool ceph_vxattrcb_quota_exists(struct ceph_inode_info *ci) |
245 | { | |
f1919826 YZ |
246 | bool ret = false; |
247 | spin_lock(&ci->i_ceph_lock); | |
248 | if ((ci->i_max_files || ci->i_max_bytes) && | |
249 | ci->i_vino.snap == CEPH_NOSNAP && | |
250 | ci->i_snap_realm && | |
251 | ci->i_snap_realm->ino == ci->i_vino.ino) | |
252 | ret = true; | |
253 | spin_unlock(&ci->i_ceph_lock); | |
254 | return ret; | |
fb18a575 LH |
255 | } |
256 | ||
257 | static size_t ceph_vxattrcb_quota(struct ceph_inode_info *ci, char *val, | |
258 | size_t size) | |
259 | { | |
260 | return snprintf(val, size, "max_bytes=%llu max_files=%llu", | |
261 | ci->i_max_bytes, ci->i_max_files); | |
262 | } | |
263 | ||
264 | static size_t ceph_vxattrcb_quota_max_bytes(struct ceph_inode_info *ci, | |
265 | char *val, size_t size) | |
266 | { | |
267 | return snprintf(val, size, "%llu", ci->i_max_bytes); | |
268 | } | |
269 | ||
270 | static size_t ceph_vxattrcb_quota_max_files(struct ceph_inode_info *ci, | |
271 | char *val, size_t size) | |
272 | { | |
273 | return snprintf(val, size, "%llu", ci->i_max_files); | |
274 | } | |
32ab0bd7 | 275 | |
eb788084 | 276 | #define CEPH_XATTR_NAME(_type, _name) XATTR_CEPH_PREFIX #_type "." #_name |
695b7119 SW |
277 | #define CEPH_XATTR_NAME2(_type, _name, _name2) \ |
278 | XATTR_CEPH_PREFIX #_type "." #_name "." #_name2 | |
eb788084 | 279 | |
49a9f4f6 | 280 | #define XATTR_NAME_CEPH(_type, _name, _flags) \ |
8860147a SW |
281 | { \ |
282 | .name = CEPH_XATTR_NAME(_type, _name), \ | |
283 | .name_size = sizeof (CEPH_XATTR_NAME(_type, _name)), \ | |
284 | .getxattr_cb = ceph_vxattrcb_ ## _type ## _ ## _name, \ | |
49a9f4f6 YZ |
285 | .exists_cb = NULL, \ |
286 | .flags = (VXATTR_FLAG_READONLY | _flags), \ | |
8860147a | 287 | } |
49a9f4f6 YZ |
288 | #define XATTR_RSTAT_FIELD(_type, _name) \ |
289 | XATTR_NAME_CEPH(_type, _name, VXATTR_FLAG_RSTAT) | |
695b7119 SW |
290 | #define XATTR_LAYOUT_FIELD(_type, _name, _field) \ |
291 | { \ | |
292 | .name = CEPH_XATTR_NAME2(_type, _name, _field), \ | |
293 | .name_size = sizeof (CEPH_XATTR_NAME2(_type, _name, _field)), \ | |
294 | .getxattr_cb = ceph_vxattrcb_ ## _name ## _ ## _field, \ | |
695b7119 | 295 | .exists_cb = ceph_vxattrcb_layout_exists, \ |
4e9906e7 | 296 | .flags = VXATTR_FLAG_HIDDEN, \ |
695b7119 | 297 | } |
fb18a575 LH |
298 | #define XATTR_QUOTA_FIELD(_type, _name) \ |
299 | { \ | |
300 | .name = CEPH_XATTR_NAME(_type, _name), \ | |
301 | .name_size = sizeof(CEPH_XATTR_NAME(_type, _name)), \ | |
302 | .getxattr_cb = ceph_vxattrcb_ ## _type ## _ ## _name, \ | |
fb18a575 | 303 | .exists_cb = ceph_vxattrcb_quota_exists, \ |
4e9906e7 | 304 | .flags = VXATTR_FLAG_HIDDEN, \ |
fb18a575 | 305 | } |
eb788084 | 306 | |
881a5fa2 | 307 | static struct ceph_vxattr ceph_dir_vxattrs[] = { |
1f08f2b0 SW |
308 | { |
309 | .name = "ceph.dir.layout", | |
310 | .name_size = sizeof("ceph.dir.layout"), | |
311 | .getxattr_cb = ceph_vxattrcb_layout, | |
1f08f2b0 | 312 | .exists_cb = ceph_vxattrcb_layout_exists, |
4e9906e7 | 313 | .flags = VXATTR_FLAG_HIDDEN, |
1f08f2b0 | 314 | }, |
695b7119 SW |
315 | XATTR_LAYOUT_FIELD(dir, layout, stripe_unit), |
316 | XATTR_LAYOUT_FIELD(dir, layout, stripe_count), | |
317 | XATTR_LAYOUT_FIELD(dir, layout, object_size), | |
318 | XATTR_LAYOUT_FIELD(dir, layout, pool), | |
779fe0fb | 319 | XATTR_LAYOUT_FIELD(dir, layout, pool_namespace), |
49a9f4f6 YZ |
320 | XATTR_NAME_CEPH(dir, entries, 0), |
321 | XATTR_NAME_CEPH(dir, files, 0), | |
322 | XATTR_NAME_CEPH(dir, subdirs, 0), | |
323 | XATTR_RSTAT_FIELD(dir, rentries), | |
324 | XATTR_RSTAT_FIELD(dir, rfiles), | |
325 | XATTR_RSTAT_FIELD(dir, rsubdirs), | |
326 | XATTR_RSTAT_FIELD(dir, rbytes), | |
327 | XATTR_RSTAT_FIELD(dir, rctime), | |
08796873 YZ |
328 | { |
329 | .name = "ceph.dir.pin", | |
330 | .name_size = sizeof("ceph.dir_pin"), | |
331 | .getxattr_cb = ceph_vxattrcb_dir_pin, | |
332 | .exists_cb = ceph_vxattrcb_dir_pin_exists, | |
333 | .flags = VXATTR_FLAG_HIDDEN, | |
334 | }, | |
fb18a575 LH |
335 | { |
336 | .name = "ceph.quota", | |
337 | .name_size = sizeof("ceph.quota"), | |
338 | .getxattr_cb = ceph_vxattrcb_quota, | |
fb18a575 | 339 | .exists_cb = ceph_vxattrcb_quota_exists, |
4e9906e7 | 340 | .flags = VXATTR_FLAG_HIDDEN, |
fb18a575 LH |
341 | }, |
342 | XATTR_QUOTA_FIELD(quota, max_bytes), | |
343 | XATTR_QUOTA_FIELD(quota, max_files), | |
2c3dd4ff | 344 | { .name = NULL, 0 } /* Required table terminator */ |
355da1eb | 345 | }; |
3ce6cd12 | 346 | static size_t ceph_dir_vxattrs_name_size; /* total size of all names */ |
355da1eb SW |
347 | |
348 | /* files */ | |
349 | ||
881a5fa2 | 350 | static struct ceph_vxattr ceph_file_vxattrs[] = { |
32ab0bd7 SW |
351 | { |
352 | .name = "ceph.file.layout", | |
353 | .name_size = sizeof("ceph.file.layout"), | |
354 | .getxattr_cb = ceph_vxattrcb_layout, | |
32ab0bd7 | 355 | .exists_cb = ceph_vxattrcb_layout_exists, |
4e9906e7 | 356 | .flags = VXATTR_FLAG_HIDDEN, |
32ab0bd7 | 357 | }, |
695b7119 SW |
358 | XATTR_LAYOUT_FIELD(file, layout, stripe_unit), |
359 | XATTR_LAYOUT_FIELD(file, layout, stripe_count), | |
360 | XATTR_LAYOUT_FIELD(file, layout, object_size), | |
361 | XATTR_LAYOUT_FIELD(file, layout, pool), | |
779fe0fb | 362 | XATTR_LAYOUT_FIELD(file, layout, pool_namespace), |
2c3dd4ff | 363 | { .name = NULL, 0 } /* Required table terminator */ |
355da1eb | 364 | }; |
3ce6cd12 | 365 | static size_t ceph_file_vxattrs_name_size; /* total size of all names */ |
355da1eb | 366 | |
881a5fa2 | 367 | static struct ceph_vxattr *ceph_inode_vxattrs(struct inode *inode) |
355da1eb SW |
368 | { |
369 | if (S_ISDIR(inode->i_mode)) | |
370 | return ceph_dir_vxattrs; | |
371 | else if (S_ISREG(inode->i_mode)) | |
372 | return ceph_file_vxattrs; | |
373 | return NULL; | |
374 | } | |
375 | ||
3ce6cd12 AE |
376 | static size_t ceph_vxattrs_name_size(struct ceph_vxattr *vxattrs) |
377 | { | |
378 | if (vxattrs == ceph_dir_vxattrs) | |
379 | return ceph_dir_vxattrs_name_size; | |
380 | if (vxattrs == ceph_file_vxattrs) | |
381 | return ceph_file_vxattrs_name_size; | |
0abb43dc | 382 | BUG_ON(vxattrs); |
3ce6cd12 AE |
383 | return 0; |
384 | } | |
385 | ||
386 | /* | |
387 | * Compute the aggregate size (including terminating '\0') of all | |
388 | * virtual extended attribute names in the given vxattr table. | |
389 | */ | |
390 | static size_t __init vxattrs_name_size(struct ceph_vxattr *vxattrs) | |
391 | { | |
392 | struct ceph_vxattr *vxattr; | |
393 | size_t size = 0; | |
394 | ||
4e9906e7 YZ |
395 | for (vxattr = vxattrs; vxattr->name; vxattr++) { |
396 | if (!(vxattr->flags & VXATTR_FLAG_HIDDEN)) | |
8860147a | 397 | size += vxattr->name_size; |
4e9906e7 | 398 | } |
3ce6cd12 AE |
399 | |
400 | return size; | |
401 | } | |
402 | ||
403 | /* Routines called at initialization and exit time */ | |
404 | ||
405 | void __init ceph_xattr_init(void) | |
406 | { | |
407 | ceph_dir_vxattrs_name_size = vxattrs_name_size(ceph_dir_vxattrs); | |
408 | ceph_file_vxattrs_name_size = vxattrs_name_size(ceph_file_vxattrs); | |
409 | } | |
410 | ||
411 | void ceph_xattr_exit(void) | |
412 | { | |
413 | ceph_dir_vxattrs_name_size = 0; | |
414 | ceph_file_vxattrs_name_size = 0; | |
415 | } | |
416 | ||
881a5fa2 | 417 | static struct ceph_vxattr *ceph_match_vxattr(struct inode *inode, |
355da1eb SW |
418 | const char *name) |
419 | { | |
881a5fa2 | 420 | struct ceph_vxattr *vxattr = ceph_inode_vxattrs(inode); |
06476a69 AE |
421 | |
422 | if (vxattr) { | |
423 | while (vxattr->name) { | |
424 | if (!strcmp(vxattr->name, name)) | |
425 | return vxattr; | |
426 | vxattr++; | |
427 | } | |
428 | } | |
429 | ||
355da1eb SW |
430 | return NULL; |
431 | } | |
432 | ||
433 | static int __set_xattr(struct ceph_inode_info *ci, | |
434 | const char *name, int name_len, | |
435 | const char *val, int val_len, | |
fbc0b970 | 436 | int flags, int update_xattr, |
355da1eb SW |
437 | struct ceph_inode_xattr **newxattr) |
438 | { | |
439 | struct rb_node **p; | |
440 | struct rb_node *parent = NULL; | |
441 | struct ceph_inode_xattr *xattr = NULL; | |
442 | int c; | |
443 | int new = 0; | |
444 | ||
445 | p = &ci->i_xattrs.index.rb_node; | |
446 | while (*p) { | |
447 | parent = *p; | |
448 | xattr = rb_entry(parent, struct ceph_inode_xattr, node); | |
449 | c = strncmp(name, xattr->name, min(name_len, xattr->name_len)); | |
450 | if (c < 0) | |
451 | p = &(*p)->rb_left; | |
452 | else if (c > 0) | |
453 | p = &(*p)->rb_right; | |
454 | else { | |
455 | if (name_len == xattr->name_len) | |
456 | break; | |
457 | else if (name_len < xattr->name_len) | |
458 | p = &(*p)->rb_left; | |
459 | else | |
460 | p = &(*p)->rb_right; | |
461 | } | |
462 | xattr = NULL; | |
463 | } | |
464 | ||
fbc0b970 YZ |
465 | if (update_xattr) { |
466 | int err = 0; | |
eeca958d | 467 | |
fbc0b970 YZ |
468 | if (xattr && (flags & XATTR_CREATE)) |
469 | err = -EEXIST; | |
470 | else if (!xattr && (flags & XATTR_REPLACE)) | |
471 | err = -ENODATA; | |
472 | if (err) { | |
473 | kfree(name); | |
474 | kfree(val); | |
eeca958d | 475 | kfree(*newxattr); |
fbc0b970 YZ |
476 | return err; |
477 | } | |
bcdfeb2e YZ |
478 | if (update_xattr < 0) { |
479 | if (xattr) | |
480 | __remove_xattr(ci, xattr); | |
481 | kfree(name); | |
eeca958d | 482 | kfree(*newxattr); |
bcdfeb2e YZ |
483 | return 0; |
484 | } | |
fbc0b970 YZ |
485 | } |
486 | ||
355da1eb SW |
487 | if (!xattr) { |
488 | new = 1; | |
489 | xattr = *newxattr; | |
490 | xattr->name = name; | |
491 | xattr->name_len = name_len; | |
fbc0b970 | 492 | xattr->should_free_name = update_xattr; |
355da1eb SW |
493 | |
494 | ci->i_xattrs.count++; | |
495 | dout("__set_xattr count=%d\n", ci->i_xattrs.count); | |
496 | } else { | |
497 | kfree(*newxattr); | |
498 | *newxattr = NULL; | |
499 | if (xattr->should_free_val) | |
500 | kfree((void *)xattr->val); | |
501 | ||
fbc0b970 | 502 | if (update_xattr) { |
355da1eb SW |
503 | kfree((void *)name); |
504 | name = xattr->name; | |
505 | } | |
506 | ci->i_xattrs.names_size -= xattr->name_len; | |
507 | ci->i_xattrs.vals_size -= xattr->val_len; | |
508 | } | |
355da1eb SW |
509 | ci->i_xattrs.names_size += name_len; |
510 | ci->i_xattrs.vals_size += val_len; | |
511 | if (val) | |
512 | xattr->val = val; | |
513 | else | |
514 | xattr->val = ""; | |
515 | ||
516 | xattr->val_len = val_len; | |
fbc0b970 YZ |
517 | xattr->dirty = update_xattr; |
518 | xattr->should_free_val = (val && update_xattr); | |
355da1eb SW |
519 | |
520 | if (new) { | |
521 | rb_link_node(&xattr->node, parent, p); | |
522 | rb_insert_color(&xattr->node, &ci->i_xattrs.index); | |
523 | dout("__set_xattr_val p=%p\n", p); | |
524 | } | |
525 | ||
526 | dout("__set_xattr_val added %llx.%llx xattr %p %s=%.*s\n", | |
527 | ceph_vinop(&ci->vfs_inode), xattr, name, val_len, val); | |
528 | ||
529 | return 0; | |
530 | } | |
531 | ||
532 | static struct ceph_inode_xattr *__get_xattr(struct ceph_inode_info *ci, | |
533 | const char *name) | |
534 | { | |
535 | struct rb_node **p; | |
536 | struct rb_node *parent = NULL; | |
537 | struct ceph_inode_xattr *xattr = NULL; | |
17db143f | 538 | int name_len = strlen(name); |
355da1eb SW |
539 | int c; |
540 | ||
541 | p = &ci->i_xattrs.index.rb_node; | |
542 | while (*p) { | |
543 | parent = *p; | |
544 | xattr = rb_entry(parent, struct ceph_inode_xattr, node); | |
545 | c = strncmp(name, xattr->name, xattr->name_len); | |
17db143f SW |
546 | if (c == 0 && name_len > xattr->name_len) |
547 | c = 1; | |
355da1eb SW |
548 | if (c < 0) |
549 | p = &(*p)->rb_left; | |
550 | else if (c > 0) | |
551 | p = &(*p)->rb_right; | |
552 | else { | |
553 | dout("__get_xattr %s: found %.*s\n", name, | |
554 | xattr->val_len, xattr->val); | |
555 | return xattr; | |
556 | } | |
557 | } | |
558 | ||
559 | dout("__get_xattr %s: not found\n", name); | |
560 | ||
561 | return NULL; | |
562 | } | |
563 | ||
564 | static void __free_xattr(struct ceph_inode_xattr *xattr) | |
565 | { | |
566 | BUG_ON(!xattr); | |
567 | ||
568 | if (xattr->should_free_name) | |
569 | kfree((void *)xattr->name); | |
570 | if (xattr->should_free_val) | |
571 | kfree((void *)xattr->val); | |
572 | ||
573 | kfree(xattr); | |
574 | } | |
575 | ||
576 | static int __remove_xattr(struct ceph_inode_info *ci, | |
577 | struct ceph_inode_xattr *xattr) | |
578 | { | |
579 | if (!xattr) | |
524186ac | 580 | return -ENODATA; |
355da1eb SW |
581 | |
582 | rb_erase(&xattr->node, &ci->i_xattrs.index); | |
583 | ||
584 | if (xattr->should_free_name) | |
585 | kfree((void *)xattr->name); | |
586 | if (xattr->should_free_val) | |
587 | kfree((void *)xattr->val); | |
588 | ||
589 | ci->i_xattrs.names_size -= xattr->name_len; | |
590 | ci->i_xattrs.vals_size -= xattr->val_len; | |
591 | ci->i_xattrs.count--; | |
592 | kfree(xattr); | |
593 | ||
594 | return 0; | |
595 | } | |
596 | ||
355da1eb SW |
597 | static char *__copy_xattr_names(struct ceph_inode_info *ci, |
598 | char *dest) | |
599 | { | |
600 | struct rb_node *p; | |
601 | struct ceph_inode_xattr *xattr = NULL; | |
602 | ||
603 | p = rb_first(&ci->i_xattrs.index); | |
604 | dout("__copy_xattr_names count=%d\n", ci->i_xattrs.count); | |
605 | ||
606 | while (p) { | |
607 | xattr = rb_entry(p, struct ceph_inode_xattr, node); | |
608 | memcpy(dest, xattr->name, xattr->name_len); | |
609 | dest[xattr->name_len] = '\0'; | |
610 | ||
611 | dout("dest=%s %p (%s) (%d/%d)\n", dest, xattr, xattr->name, | |
612 | xattr->name_len, ci->i_xattrs.names_size); | |
613 | ||
614 | dest += xattr->name_len + 1; | |
615 | p = rb_next(p); | |
616 | } | |
617 | ||
618 | return dest; | |
619 | } | |
620 | ||
621 | void __ceph_destroy_xattrs(struct ceph_inode_info *ci) | |
622 | { | |
623 | struct rb_node *p, *tmp; | |
624 | struct ceph_inode_xattr *xattr = NULL; | |
625 | ||
626 | p = rb_first(&ci->i_xattrs.index); | |
627 | ||
628 | dout("__ceph_destroy_xattrs p=%p\n", p); | |
629 | ||
630 | while (p) { | |
631 | xattr = rb_entry(p, struct ceph_inode_xattr, node); | |
632 | tmp = p; | |
633 | p = rb_next(tmp); | |
634 | dout("__ceph_destroy_xattrs next p=%p (%.*s)\n", p, | |
635 | xattr->name_len, xattr->name); | |
636 | rb_erase(tmp, &ci->i_xattrs.index); | |
637 | ||
638 | __free_xattr(xattr); | |
639 | } | |
640 | ||
641 | ci->i_xattrs.names_size = 0; | |
642 | ci->i_xattrs.vals_size = 0; | |
643 | ci->i_xattrs.index_version = 0; | |
644 | ci->i_xattrs.count = 0; | |
645 | ci->i_xattrs.index = RB_ROOT; | |
646 | } | |
647 | ||
648 | static int __build_xattrs(struct inode *inode) | |
be655596 SW |
649 | __releases(ci->i_ceph_lock) |
650 | __acquires(ci->i_ceph_lock) | |
355da1eb SW |
651 | { |
652 | u32 namelen; | |
653 | u32 numattr = 0; | |
654 | void *p, *end; | |
655 | u32 len; | |
656 | const char *name, *val; | |
657 | struct ceph_inode_info *ci = ceph_inode(inode); | |
658 | int xattr_version; | |
659 | struct ceph_inode_xattr **xattrs = NULL; | |
63ff78b2 | 660 | int err = 0; |
355da1eb SW |
661 | int i; |
662 | ||
663 | dout("__build_xattrs() len=%d\n", | |
664 | ci->i_xattrs.blob ? (int)ci->i_xattrs.blob->vec.iov_len : 0); | |
665 | ||
666 | if (ci->i_xattrs.index_version >= ci->i_xattrs.version) | |
667 | return 0; /* already built */ | |
668 | ||
669 | __ceph_destroy_xattrs(ci); | |
670 | ||
671 | start: | |
672 | /* updated internal xattr rb tree */ | |
673 | if (ci->i_xattrs.blob && ci->i_xattrs.blob->vec.iov_len > 4) { | |
674 | p = ci->i_xattrs.blob->vec.iov_base; | |
675 | end = p + ci->i_xattrs.blob->vec.iov_len; | |
676 | ceph_decode_32_safe(&p, end, numattr, bad); | |
677 | xattr_version = ci->i_xattrs.version; | |
be655596 | 678 | spin_unlock(&ci->i_ceph_lock); |
355da1eb | 679 | |
7e8a2952 | 680 | xattrs = kcalloc(numattr, sizeof(struct ceph_inode_xattr *), |
355da1eb SW |
681 | GFP_NOFS); |
682 | err = -ENOMEM; | |
683 | if (!xattrs) | |
684 | goto bad_lock; | |
1a295bd8 | 685 | |
355da1eb SW |
686 | for (i = 0; i < numattr; i++) { |
687 | xattrs[i] = kmalloc(sizeof(struct ceph_inode_xattr), | |
688 | GFP_NOFS); | |
689 | if (!xattrs[i]) | |
690 | goto bad_lock; | |
691 | } | |
692 | ||
be655596 | 693 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
694 | if (ci->i_xattrs.version != xattr_version) { |
695 | /* lost a race, retry */ | |
696 | for (i = 0; i < numattr; i++) | |
697 | kfree(xattrs[i]); | |
698 | kfree(xattrs); | |
21ec6ffa | 699 | xattrs = NULL; |
355da1eb SW |
700 | goto start; |
701 | } | |
702 | err = -EIO; | |
703 | while (numattr--) { | |
704 | ceph_decode_32_safe(&p, end, len, bad); | |
705 | namelen = len; | |
706 | name = p; | |
707 | p += len; | |
708 | ceph_decode_32_safe(&p, end, len, bad); | |
709 | val = p; | |
710 | p += len; | |
711 | ||
712 | err = __set_xattr(ci, name, namelen, val, len, | |
fbc0b970 | 713 | 0, 0, &xattrs[numattr]); |
355da1eb SW |
714 | |
715 | if (err < 0) | |
716 | goto bad; | |
717 | } | |
718 | kfree(xattrs); | |
719 | } | |
720 | ci->i_xattrs.index_version = ci->i_xattrs.version; | |
721 | ci->i_xattrs.dirty = false; | |
722 | ||
723 | return err; | |
724 | bad_lock: | |
be655596 | 725 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
726 | bad: |
727 | if (xattrs) { | |
728 | for (i = 0; i < numattr; i++) | |
729 | kfree(xattrs[i]); | |
730 | kfree(xattrs); | |
731 | } | |
732 | ci->i_xattrs.names_size = 0; | |
733 | return err; | |
734 | } | |
735 | ||
736 | static int __get_required_blob_size(struct ceph_inode_info *ci, int name_size, | |
737 | int val_size) | |
738 | { | |
739 | /* | |
740 | * 4 bytes for the length, and additional 4 bytes per each xattr name, | |
741 | * 4 bytes per each value | |
742 | */ | |
743 | int size = 4 + ci->i_xattrs.count*(4 + 4) + | |
744 | ci->i_xattrs.names_size + | |
745 | ci->i_xattrs.vals_size; | |
746 | dout("__get_required_blob_size c=%d names.size=%d vals.size=%d\n", | |
747 | ci->i_xattrs.count, ci->i_xattrs.names_size, | |
748 | ci->i_xattrs.vals_size); | |
749 | ||
750 | if (name_size) | |
751 | size += 4 + 4 + name_size + val_size; | |
752 | ||
753 | return size; | |
754 | } | |
755 | ||
756 | /* | |
757 | * If there are dirty xattrs, reencode xattrs into the prealloc_blob | |
758 | * and swap into place. | |
759 | */ | |
760 | void __ceph_build_xattrs_blob(struct ceph_inode_info *ci) | |
761 | { | |
762 | struct rb_node *p; | |
763 | struct ceph_inode_xattr *xattr = NULL; | |
764 | void *dest; | |
765 | ||
766 | dout("__build_xattrs_blob %p\n", &ci->vfs_inode); | |
767 | if (ci->i_xattrs.dirty) { | |
768 | int need = __get_required_blob_size(ci, 0, 0); | |
769 | ||
770 | BUG_ON(need > ci->i_xattrs.prealloc_blob->alloc_len); | |
771 | ||
772 | p = rb_first(&ci->i_xattrs.index); | |
773 | dest = ci->i_xattrs.prealloc_blob->vec.iov_base; | |
774 | ||
775 | ceph_encode_32(&dest, ci->i_xattrs.count); | |
776 | while (p) { | |
777 | xattr = rb_entry(p, struct ceph_inode_xattr, node); | |
778 | ||
779 | ceph_encode_32(&dest, xattr->name_len); | |
780 | memcpy(dest, xattr->name, xattr->name_len); | |
781 | dest += xattr->name_len; | |
782 | ceph_encode_32(&dest, xattr->val_len); | |
783 | memcpy(dest, xattr->val, xattr->val_len); | |
784 | dest += xattr->val_len; | |
785 | ||
786 | p = rb_next(p); | |
787 | } | |
788 | ||
789 | /* adjust buffer len; it may be larger than we need */ | |
790 | ci->i_xattrs.prealloc_blob->vec.iov_len = | |
791 | dest - ci->i_xattrs.prealloc_blob->vec.iov_base; | |
792 | ||
b6c1d5b8 SW |
793 | if (ci->i_xattrs.blob) |
794 | ceph_buffer_put(ci->i_xattrs.blob); | |
355da1eb SW |
795 | ci->i_xattrs.blob = ci->i_xattrs.prealloc_blob; |
796 | ci->i_xattrs.prealloc_blob = NULL; | |
797 | ci->i_xattrs.dirty = false; | |
4a625be4 | 798 | ci->i_xattrs.version++; |
355da1eb SW |
799 | } |
800 | } | |
801 | ||
315f2408 YZ |
802 | static inline int __get_request_mask(struct inode *in) { |
803 | struct ceph_mds_request *req = current->journal_info; | |
804 | int mask = 0; | |
805 | if (req && req->r_target_inode == in) { | |
806 | if (req->r_op == CEPH_MDS_OP_LOOKUP || | |
807 | req->r_op == CEPH_MDS_OP_LOOKUPINO || | |
808 | req->r_op == CEPH_MDS_OP_LOOKUPPARENT || | |
809 | req->r_op == CEPH_MDS_OP_GETATTR) { | |
810 | mask = le32_to_cpu(req->r_args.getattr.mask); | |
811 | } else if (req->r_op == CEPH_MDS_OP_OPEN || | |
812 | req->r_op == CEPH_MDS_OP_CREATE) { | |
813 | mask = le32_to_cpu(req->r_args.open.mask); | |
814 | } | |
815 | } | |
816 | return mask; | |
817 | } | |
818 | ||
7221fe4c | 819 | ssize_t __ceph_getxattr(struct inode *inode, const char *name, void *value, |
355da1eb SW |
820 | size_t size) |
821 | { | |
355da1eb | 822 | struct ceph_inode_info *ci = ceph_inode(inode); |
355da1eb | 823 | struct ceph_inode_xattr *xattr; |
881a5fa2 | 824 | struct ceph_vxattr *vxattr = NULL; |
315f2408 YZ |
825 | int req_mask; |
826 | int err; | |
355da1eb | 827 | |
0bee82fb SW |
828 | /* let's see if a virtual xattr was requested */ |
829 | vxattr = ceph_match_vxattr(inode, name); | |
29dccfa5 | 830 | if (vxattr) { |
49a9f4f6 YZ |
831 | int mask = 0; |
832 | if (vxattr->flags & VXATTR_FLAG_RSTAT) | |
833 | mask |= CEPH_STAT_RSTAT; | |
834 | err = ceph_do_getattr(inode, mask, true); | |
1684dd03 YZ |
835 | if (err) |
836 | return err; | |
29dccfa5 YZ |
837 | err = -ENODATA; |
838 | if (!(vxattr->exists_cb && !vxattr->exists_cb(ci))) | |
839 | err = vxattr->getxattr_cb(ci, value, size); | |
a1dc1937 | 840 | return err; |
0bee82fb SW |
841 | } |
842 | ||
315f2408 YZ |
843 | req_mask = __get_request_mask(inode); |
844 | ||
a1dc1937 | 845 | spin_lock(&ci->i_ceph_lock); |
846 | dout("getxattr %p ver=%lld index_ver=%lld\n", inode, | |
847 | ci->i_xattrs.version, ci->i_xattrs.index_version); | |
848 | ||
508b32d8 | 849 | if (ci->i_xattrs.version == 0 || |
315f2408 YZ |
850 | !((req_mask & CEPH_CAP_XATTR_SHARED) || |
851 | __ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 1))) { | |
be655596 | 852 | spin_unlock(&ci->i_ceph_lock); |
315f2408 YZ |
853 | |
854 | /* security module gets xattr while filling trace */ | |
d37b1d99 | 855 | if (current->journal_info) { |
315f2408 YZ |
856 | pr_warn_ratelimited("sync getxattr %p " |
857 | "during filling trace\n", inode); | |
858 | return -EBUSY; | |
859 | } | |
860 | ||
355da1eb | 861 | /* get xattrs from mds (if we don't already have them) */ |
508b32d8 | 862 | err = ceph_do_getattr(inode, CEPH_STAT_CAP_XATTR, true); |
355da1eb SW |
863 | if (err) |
864 | return err; | |
508b32d8 | 865 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
866 | } |
867 | ||
355da1eb SW |
868 | err = __build_xattrs(inode); |
869 | if (err < 0) | |
870 | goto out; | |
871 | ||
355da1eb SW |
872 | err = -ENODATA; /* == ENOATTR */ |
873 | xattr = __get_xattr(ci, name); | |
0bee82fb | 874 | if (!xattr) |
355da1eb | 875 | goto out; |
355da1eb SW |
876 | |
877 | err = -ERANGE; | |
878 | if (size && size < xattr->val_len) | |
879 | goto out; | |
880 | ||
881 | err = xattr->val_len; | |
882 | if (size == 0) | |
883 | goto out; | |
884 | ||
885 | memcpy(value, xattr->val, xattr->val_len); | |
886 | ||
d37b1d99 | 887 | if (current->journal_info && |
315f2408 YZ |
888 | !strncmp(name, XATTR_SECURITY_PREFIX, XATTR_SECURITY_PREFIX_LEN)) |
889 | ci->i_ceph_flags |= CEPH_I_SEC_INITED; | |
355da1eb | 890 | out: |
be655596 | 891 | spin_unlock(&ci->i_ceph_lock); |
355da1eb SW |
892 | return err; |
893 | } | |
894 | ||
895 | ssize_t ceph_listxattr(struct dentry *dentry, char *names, size_t size) | |
896 | { | |
2b0143b5 | 897 | struct inode *inode = d_inode(dentry); |
355da1eb | 898 | struct ceph_inode_info *ci = ceph_inode(inode); |
881a5fa2 | 899 | struct ceph_vxattr *vxattrs = ceph_inode_vxattrs(inode); |
355da1eb SW |
900 | u32 vir_namelen = 0; |
901 | u32 namelen; | |
902 | int err; | |
903 | u32 len; | |
904 | int i; | |
905 | ||
be655596 | 906 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
907 | dout("listxattr %p ver=%lld index_ver=%lld\n", inode, |
908 | ci->i_xattrs.version, ci->i_xattrs.index_version); | |
909 | ||
508b32d8 YZ |
910 | if (ci->i_xattrs.version == 0 || |
911 | !__ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 1)) { | |
be655596 | 912 | spin_unlock(&ci->i_ceph_lock); |
508b32d8 | 913 | err = ceph_do_getattr(inode, CEPH_STAT_CAP_XATTR, true); |
355da1eb SW |
914 | if (err) |
915 | return err; | |
508b32d8 | 916 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
917 | } |
918 | ||
355da1eb SW |
919 | err = __build_xattrs(inode); |
920 | if (err < 0) | |
921 | goto out; | |
3ce6cd12 AE |
922 | /* |
923 | * Start with virtual dir xattr names (if any) (including | |
924 | * terminating '\0' characters for each). | |
925 | */ | |
926 | vir_namelen = ceph_vxattrs_name_size(vxattrs); | |
927 | ||
355da1eb | 928 | /* adding 1 byte per each variable due to the null termination */ |
b65917dd | 929 | namelen = ci->i_xattrs.names_size + ci->i_xattrs.count; |
355da1eb | 930 | err = -ERANGE; |
b65917dd | 931 | if (size && vir_namelen + namelen > size) |
355da1eb SW |
932 | goto out; |
933 | ||
b65917dd | 934 | err = namelen + vir_namelen; |
355da1eb SW |
935 | if (size == 0) |
936 | goto out; | |
937 | ||
938 | names = __copy_xattr_names(ci, names); | |
939 | ||
940 | /* virtual xattr names, too */ | |
b65917dd SW |
941 | err = namelen; |
942 | if (vxattrs) { | |
355da1eb | 943 | for (i = 0; vxattrs[i].name; i++) { |
4e9906e7 | 944 | if (!(vxattrs[i].flags & VXATTR_FLAG_HIDDEN) && |
b65917dd SW |
945 | !(vxattrs[i].exists_cb && |
946 | !vxattrs[i].exists_cb(ci))) { | |
947 | len = sprintf(names, "%s", vxattrs[i].name); | |
948 | names += len + 1; | |
949 | err += len + 1; | |
950 | } | |
355da1eb | 951 | } |
b65917dd | 952 | } |
355da1eb SW |
953 | |
954 | out: | |
be655596 | 955 | spin_unlock(&ci->i_ceph_lock); |
355da1eb SW |
956 | return err; |
957 | } | |
958 | ||
a26fecca | 959 | static int ceph_sync_setxattr(struct inode *inode, const char *name, |
355da1eb SW |
960 | const char *value, size_t size, int flags) |
961 | { | |
a26fecca | 962 | struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb); |
355da1eb | 963 | struct ceph_inode_info *ci = ceph_inode(inode); |
355da1eb | 964 | struct ceph_mds_request *req; |
3d14c5d2 | 965 | struct ceph_mds_client *mdsc = fsc->mdsc; |
25e6bae3 | 966 | struct ceph_pagelist *pagelist = NULL; |
04303d8a | 967 | int op = CEPH_MDS_OP_SETXATTR; |
355da1eb | 968 | int err; |
25e6bae3 | 969 | |
0aeff37a | 970 | if (size > 0) { |
25e6bae3 | 971 | /* copy value into pagelist */ |
33165d47 | 972 | pagelist = ceph_pagelist_alloc(GFP_NOFS); |
25e6bae3 | 973 | if (!pagelist) |
355da1eb | 974 | return -ENOMEM; |
25e6bae3 | 975 | |
25e6bae3 YZ |
976 | err = ceph_pagelist_append(pagelist, value, size); |
977 | if (err) | |
978 | goto out; | |
0aeff37a | 979 | } else if (!value) { |
04303d8a YZ |
980 | if (flags & CEPH_XATTR_REPLACE) |
981 | op = CEPH_MDS_OP_RMXATTR; | |
982 | else | |
983 | flags |= CEPH_XATTR_REMOVE; | |
355da1eb SW |
984 | } |
985 | ||
986 | dout("setxattr value=%.*s\n", (int)size, value); | |
987 | ||
988 | /* do request */ | |
04303d8a | 989 | req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS); |
60d87733 JL |
990 | if (IS_ERR(req)) { |
991 | err = PTR_ERR(req); | |
992 | goto out; | |
993 | } | |
a149bb9a | 994 | |
355da1eb | 995 | req->r_path2 = kstrdup(name, GFP_NOFS); |
a149bb9a SK |
996 | if (!req->r_path2) { |
997 | ceph_mdsc_put_request(req); | |
998 | err = -ENOMEM; | |
999 | goto out; | |
1000 | } | |
355da1eb | 1001 | |
04303d8a YZ |
1002 | if (op == CEPH_MDS_OP_SETXATTR) { |
1003 | req->r_args.setxattr.flags = cpu_to_le32(flags); | |
1004 | req->r_pagelist = pagelist; | |
1005 | pagelist = NULL; | |
1006 | } | |
355da1eb | 1007 | |
a149bb9a SK |
1008 | req->r_inode = inode; |
1009 | ihold(inode); | |
1010 | req->r_num_caps = 1; | |
1011 | req->r_inode_drop = CEPH_CAP_XATTR_SHARED; | |
1012 | ||
355da1eb | 1013 | dout("xattr.ver (before): %lld\n", ci->i_xattrs.version); |
752c8bdc | 1014 | err = ceph_mdsc_do_request(mdsc, NULL, req); |
355da1eb SW |
1015 | ceph_mdsc_put_request(req); |
1016 | dout("xattr.ver (after): %lld\n", ci->i_xattrs.version); | |
1017 | ||
1018 | out: | |
25e6bae3 YZ |
1019 | if (pagelist) |
1020 | ceph_pagelist_release(pagelist); | |
355da1eb SW |
1021 | return err; |
1022 | } | |
1023 | ||
a26fecca | 1024 | int __ceph_setxattr(struct inode *inode, const char *name, |
7221fe4c | 1025 | const void *value, size_t size, int flags) |
355da1eb | 1026 | { |
881a5fa2 | 1027 | struct ceph_vxattr *vxattr; |
355da1eb | 1028 | struct ceph_inode_info *ci = ceph_inode(inode); |
a26fecca | 1029 | struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc; |
f66fd9f0 | 1030 | struct ceph_cap_flush *prealloc_cf = NULL; |
18fa8b3f | 1031 | int issued; |
355da1eb | 1032 | int err; |
fbc0b970 | 1033 | int dirty = 0; |
355da1eb SW |
1034 | int name_len = strlen(name); |
1035 | int val_len = size; | |
1036 | char *newname = NULL; | |
1037 | char *newval = NULL; | |
1038 | struct ceph_inode_xattr *xattr = NULL; | |
355da1eb | 1039 | int required_blob_size; |
f1919826 | 1040 | bool check_realm = false; |
604d1b02 | 1041 | bool lock_snap_rwsem = false; |
355da1eb | 1042 | |
2cdeb1e4 AG |
1043 | if (ceph_snap(inode) != CEPH_NOSNAP) |
1044 | return -EROFS; | |
355da1eb | 1045 | |
06476a69 | 1046 | vxattr = ceph_match_vxattr(inode, name); |
f1919826 | 1047 | if (vxattr) { |
4e9906e7 | 1048 | if (vxattr->flags & VXATTR_FLAG_READONLY) |
f1919826 YZ |
1049 | return -EOPNOTSUPP; |
1050 | if (value && !strncmp(vxattr->name, "ceph.quota", 10)) | |
1051 | check_realm = true; | |
1052 | } | |
355da1eb | 1053 | |
3adf654d SW |
1054 | /* pass any unhandled ceph.* xattrs through to the MDS */ |
1055 | if (!strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN)) | |
1056 | goto do_sync_unlocked; | |
1057 | ||
355da1eb SW |
1058 | /* preallocate memory for xattr name, value, index node */ |
1059 | err = -ENOMEM; | |
61413c2f | 1060 | newname = kmemdup(name, name_len + 1, GFP_NOFS); |
355da1eb SW |
1061 | if (!newname) |
1062 | goto out; | |
355da1eb SW |
1063 | |
1064 | if (val_len) { | |
b829c195 | 1065 | newval = kmemdup(value, val_len, GFP_NOFS); |
355da1eb SW |
1066 | if (!newval) |
1067 | goto out; | |
355da1eb SW |
1068 | } |
1069 | ||
1070 | xattr = kmalloc(sizeof(struct ceph_inode_xattr), GFP_NOFS); | |
1071 | if (!xattr) | |
1072 | goto out; | |
1073 | ||
f66fd9f0 YZ |
1074 | prealloc_cf = ceph_alloc_cap_flush(); |
1075 | if (!prealloc_cf) | |
1076 | goto out; | |
1077 | ||
be655596 | 1078 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
1079 | retry: |
1080 | issued = __ceph_caps_issued(ci, NULL); | |
508b32d8 | 1081 | if (ci->i_xattrs.version == 0 || !(issued & CEPH_CAP_XATTR_EXCL)) |
355da1eb | 1082 | goto do_sync; |
604d1b02 YZ |
1083 | |
1084 | if (!lock_snap_rwsem && !ci->i_head_snapc) { | |
1085 | lock_snap_rwsem = true; | |
1086 | if (!down_read_trylock(&mdsc->snap_rwsem)) { | |
1087 | spin_unlock(&ci->i_ceph_lock); | |
1088 | down_read(&mdsc->snap_rwsem); | |
1089 | spin_lock(&ci->i_ceph_lock); | |
1090 | goto retry; | |
1091 | } | |
1092 | } | |
1093 | ||
1094 | dout("setxattr %p issued %s\n", inode, ceph_cap_string(issued)); | |
355da1eb SW |
1095 | __build_xattrs(inode); |
1096 | ||
1097 | required_blob_size = __get_required_blob_size(ci, name_len, val_len); | |
1098 | ||
1099 | if (!ci->i_xattrs.prealloc_blob || | |
1100 | required_blob_size > ci->i_xattrs.prealloc_blob->alloc_len) { | |
18fa8b3f | 1101 | struct ceph_buffer *blob; |
355da1eb | 1102 | |
be655596 | 1103 | spin_unlock(&ci->i_ceph_lock); |
355da1eb | 1104 | dout(" preaallocating new blob size=%d\n", required_blob_size); |
b6c1d5b8 | 1105 | blob = ceph_buffer_new(required_blob_size, GFP_NOFS); |
355da1eb | 1106 | if (!blob) |
604d1b02 | 1107 | goto do_sync_unlocked; |
be655596 | 1108 | spin_lock(&ci->i_ceph_lock); |
b6c1d5b8 SW |
1109 | if (ci->i_xattrs.prealloc_blob) |
1110 | ceph_buffer_put(ci->i_xattrs.prealloc_blob); | |
355da1eb SW |
1111 | ci->i_xattrs.prealloc_blob = blob; |
1112 | goto retry; | |
1113 | } | |
1114 | ||
bcdfeb2e YZ |
1115 | err = __set_xattr(ci, newname, name_len, newval, val_len, |
1116 | flags, value ? 1 : -1, &xattr); | |
18fa8b3f | 1117 | |
fbc0b970 | 1118 | if (!err) { |
f66fd9f0 YZ |
1119 | dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_XATTR_EXCL, |
1120 | &prealloc_cf); | |
fbc0b970 | 1121 | ci->i_xattrs.dirty = true; |
c2050a45 | 1122 | inode->i_ctime = current_time(inode); |
fbc0b970 | 1123 | } |
18fa8b3f | 1124 | |
be655596 | 1125 | spin_unlock(&ci->i_ceph_lock); |
604d1b02 YZ |
1126 | if (lock_snap_rwsem) |
1127 | up_read(&mdsc->snap_rwsem); | |
fca65b4a SW |
1128 | if (dirty) |
1129 | __mark_inode_dirty(inode, dirty); | |
f66fd9f0 | 1130 | ceph_free_cap_flush(prealloc_cf); |
355da1eb SW |
1131 | return err; |
1132 | ||
1133 | do_sync: | |
be655596 | 1134 | spin_unlock(&ci->i_ceph_lock); |
3adf654d | 1135 | do_sync_unlocked: |
604d1b02 YZ |
1136 | if (lock_snap_rwsem) |
1137 | up_read(&mdsc->snap_rwsem); | |
315f2408 YZ |
1138 | |
1139 | /* security module set xattr while filling trace */ | |
d37b1d99 | 1140 | if (current->journal_info) { |
315f2408 YZ |
1141 | pr_warn_ratelimited("sync setxattr %p " |
1142 | "during filling trace\n", inode); | |
1143 | err = -EBUSY; | |
1144 | } else { | |
a26fecca | 1145 | err = ceph_sync_setxattr(inode, name, value, size, flags); |
f1919826 YZ |
1146 | if (err >= 0 && check_realm) { |
1147 | /* check if snaprealm was created for quota inode */ | |
1148 | spin_lock(&ci->i_ceph_lock); | |
1149 | if ((ci->i_max_files || ci->i_max_bytes) && | |
1150 | !(ci->i_snap_realm && | |
1151 | ci->i_snap_realm->ino == ci->i_vino.ino)) | |
1152 | err = -EOPNOTSUPP; | |
1153 | spin_unlock(&ci->i_ceph_lock); | |
1154 | } | |
315f2408 | 1155 | } |
355da1eb | 1156 | out: |
f66fd9f0 | 1157 | ceph_free_cap_flush(prealloc_cf); |
355da1eb SW |
1158 | kfree(newname); |
1159 | kfree(newval); | |
1160 | kfree(xattr); | |
1161 | return err; | |
1162 | } | |
1163 | ||
2cdeb1e4 AG |
1164 | static int ceph_get_xattr_handler(const struct xattr_handler *handler, |
1165 | struct dentry *dentry, struct inode *inode, | |
1166 | const char *name, void *value, size_t size) | |
7221fe4c | 1167 | { |
2cdeb1e4 AG |
1168 | if (!ceph_is_valid_xattr(name)) |
1169 | return -EOPNOTSUPP; | |
1170 | return __ceph_getxattr(inode, name, value, size); | |
1171 | } | |
7221fe4c | 1172 | |
2cdeb1e4 | 1173 | static int ceph_set_xattr_handler(const struct xattr_handler *handler, |
59301226 AV |
1174 | struct dentry *unused, struct inode *inode, |
1175 | const char *name, const void *value, | |
1176 | size_t size, int flags) | |
2cdeb1e4 AG |
1177 | { |
1178 | if (!ceph_is_valid_xattr(name)) | |
1179 | return -EOPNOTSUPP; | |
59301226 | 1180 | return __ceph_setxattr(inode, name, value, size, flags); |
7221fe4c | 1181 | } |
315f2408 | 1182 | |
5130ccea | 1183 | static const struct xattr_handler ceph_other_xattr_handler = { |
2cdeb1e4 AG |
1184 | .prefix = "", /* match any name => handlers called with full name */ |
1185 | .get = ceph_get_xattr_handler, | |
1186 | .set = ceph_set_xattr_handler, | |
1187 | }; | |
1188 | ||
315f2408 YZ |
1189 | #ifdef CONFIG_SECURITY |
1190 | bool ceph_security_xattr_wanted(struct inode *in) | |
1191 | { | |
1192 | return in->i_security != NULL; | |
1193 | } | |
1194 | ||
1195 | bool ceph_security_xattr_deadlock(struct inode *in) | |
1196 | { | |
1197 | struct ceph_inode_info *ci; | |
1198 | bool ret; | |
d37b1d99 | 1199 | if (!in->i_security) |
315f2408 YZ |
1200 | return false; |
1201 | ci = ceph_inode(in); | |
1202 | spin_lock(&ci->i_ceph_lock); | |
1203 | ret = !(ci->i_ceph_flags & CEPH_I_SEC_INITED) && | |
1204 | !(ci->i_xattrs.version > 0 && | |
1205 | __ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 0)); | |
1206 | spin_unlock(&ci->i_ceph_lock); | |
1207 | return ret; | |
1208 | } | |
1209 | #endif |