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Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -07001#include <linux/ceph/ceph_debug.h>
2
Sage Weil355da1e2009-10-06 11:31:08 -07003#include "super.h"
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -07004#include "mds_client.h"
5
6#include <linux/ceph/decode.h>
Sage Weil355da1e2009-10-06 11:31:08 -07007
8#include <linux/xattr.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +09009#include <linux/slab.h>
Sage Weil355da1e2009-10-06 11:31:08 -070010
Alex Elder22891902012-01-23 15:49:28 -060011#define XATTR_CEPH_PREFIX "ceph."
12#define XATTR_CEPH_PREFIX_LEN (sizeof (XATTR_CEPH_PREFIX) - 1)
13
Sage Weil355da1e2009-10-06 11:31:08 -070014static bool ceph_is_valid_xattr(const char *name)
15{
Alex Elder22891902012-01-23 15:49:28 -060016 return !strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN) ||
Sage Weil1a756272010-05-11 11:40:25 -070017 !strncmp(name, XATTR_SECURITY_PREFIX,
Sage Weil355da1e2009-10-06 11:31:08 -070018 XATTR_SECURITY_PREFIX_LEN) ||
19 !strncmp(name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN) ||
20 !strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
21}
22
23/*
24 * These define virtual xattrs exposing the recursive directory
25 * statistics and layout metadata.
26 */
Alex Elder881a5fa2012-01-23 15:49:28 -060027struct ceph_vxattr {
Sage Weil355da1e2009-10-06 11:31:08 -070028 char *name;
Alex Elder3ce6cd12012-01-23 15:49:28 -060029 size_t name_size; /* strlen(name) + 1 (for '\0') */
Sage Weil355da1e2009-10-06 11:31:08 -070030 size_t (*getxattr_cb)(struct ceph_inode_info *ci, char *val,
31 size_t size);
Sage Weil88601472013-01-31 11:53:27 -080032 bool readonly, hidden;
Sage Weilf36e4472013-01-20 21:59:29 -080033 bool (*exists_cb)(struct ceph_inode_info *ci);
Sage Weil355da1e2009-10-06 11:31:08 -070034};
35
Sage Weil32ab0bd2013-01-19 16:46:32 -080036/* layouts */
37
38static bool ceph_vxattrcb_layout_exists(struct ceph_inode_info *ci)
39{
40 size_t s;
41 char *p = (char *)&ci->i_layout;
42
43 for (s = 0; s < sizeof(ci->i_layout); s++, p++)
44 if (*p)
45 return true;
46 return false;
47}
48
49static size_t ceph_vxattrcb_layout(struct ceph_inode_info *ci, char *val,
50 size_t size)
51{
52 int ret;
53 struct ceph_fs_client *fsc = ceph_sb_to_client(ci->vfs_inode.i_sb);
54 struct ceph_osd_client *osdc = &fsc->client->osdc;
55 s64 pool = ceph_file_layout_pg_pool(ci->i_layout);
56 const char *pool_name;
57
58 dout("ceph_vxattrcb_layout %p\n", &ci->vfs_inode);
59 down_read(&osdc->map_sem);
60 pool_name = ceph_pg_pool_name_by_id(osdc->osdmap, pool);
61 if (pool_name)
62 ret = snprintf(val, size,
63 "stripe_unit=%lld stripe_count=%lld object_size=%lld pool=%s",
64 (unsigned long long)ceph_file_layout_su(ci->i_layout),
65 (unsigned long long)ceph_file_layout_stripe_count(ci->i_layout),
66 (unsigned long long)ceph_file_layout_object_size(ci->i_layout),
67 pool_name);
68 else
69 ret = snprintf(val, size,
70 "stripe_unit=%lld stripe_count=%lld object_size=%lld pool=%lld",
71 (unsigned long long)ceph_file_layout_su(ci->i_layout),
72 (unsigned long long)ceph_file_layout_stripe_count(ci->i_layout),
73 (unsigned long long)ceph_file_layout_object_size(ci->i_layout),
74 (unsigned long long)pool);
75
76 up_read(&osdc->map_sem);
77 return ret;
78}
79
Sage Weil695b7112013-01-20 22:08:33 -080080static size_t ceph_vxattrcb_layout_stripe_unit(struct ceph_inode_info *ci,
81 char *val, size_t size)
82{
83 return snprintf(val, size, "%lld",
84 (unsigned long long)ceph_file_layout_su(ci->i_layout));
85}
86
87static size_t ceph_vxattrcb_layout_stripe_count(struct ceph_inode_info *ci,
88 char *val, size_t size)
89{
90 return snprintf(val, size, "%lld",
91 (unsigned long long)ceph_file_layout_stripe_count(ci->i_layout));
92}
93
94static size_t ceph_vxattrcb_layout_object_size(struct ceph_inode_info *ci,
95 char *val, size_t size)
96{
97 return snprintf(val, size, "%lld",
98 (unsigned long long)ceph_file_layout_object_size(ci->i_layout));
99}
100
101static size_t ceph_vxattrcb_layout_pool(struct ceph_inode_info *ci,
102 char *val, size_t size)
103{
104 int ret;
105 struct ceph_fs_client *fsc = ceph_sb_to_client(ci->vfs_inode.i_sb);
106 struct ceph_osd_client *osdc = &fsc->client->osdc;
107 s64 pool = ceph_file_layout_pg_pool(ci->i_layout);
108 const char *pool_name;
109
110 down_read(&osdc->map_sem);
111 pool_name = ceph_pg_pool_name_by_id(osdc->osdmap, pool);
112 if (pool_name)
113 ret = snprintf(val, size, "%s", pool_name);
114 else
115 ret = snprintf(val, size, "%lld", (unsigned long long)pool);
116 up_read(&osdc->map_sem);
117 return ret;
118}
119
Sage Weil355da1e2009-10-06 11:31:08 -0700120/* directories */
121
Alex Elderaa4066e2012-01-23 15:49:28 -0600122static size_t ceph_vxattrcb_dir_entries(struct ceph_inode_info *ci, char *val,
Sage Weil355da1e2009-10-06 11:31:08 -0700123 size_t size)
124{
125 return snprintf(val, size, "%lld", ci->i_files + ci->i_subdirs);
126}
127
Alex Elderaa4066e2012-01-23 15:49:28 -0600128static size_t ceph_vxattrcb_dir_files(struct ceph_inode_info *ci, char *val,
Sage Weil355da1e2009-10-06 11:31:08 -0700129 size_t size)
130{
131 return snprintf(val, size, "%lld", ci->i_files);
132}
133
Alex Elderaa4066e2012-01-23 15:49:28 -0600134static size_t ceph_vxattrcb_dir_subdirs(struct ceph_inode_info *ci, char *val,
Sage Weil355da1e2009-10-06 11:31:08 -0700135 size_t size)
136{
137 return snprintf(val, size, "%lld", ci->i_subdirs);
138}
139
Alex Elderaa4066e2012-01-23 15:49:28 -0600140static size_t ceph_vxattrcb_dir_rentries(struct ceph_inode_info *ci, char *val,
Sage Weil355da1e2009-10-06 11:31:08 -0700141 size_t size)
142{
143 return snprintf(val, size, "%lld", ci->i_rfiles + ci->i_rsubdirs);
144}
145
Alex Elderaa4066e2012-01-23 15:49:28 -0600146static size_t ceph_vxattrcb_dir_rfiles(struct ceph_inode_info *ci, char *val,
Sage Weil355da1e2009-10-06 11:31:08 -0700147 size_t size)
148{
149 return snprintf(val, size, "%lld", ci->i_rfiles);
150}
151
Alex Elderaa4066e2012-01-23 15:49:28 -0600152static size_t ceph_vxattrcb_dir_rsubdirs(struct ceph_inode_info *ci, char *val,
Sage Weil355da1e2009-10-06 11:31:08 -0700153 size_t size)
154{
155 return snprintf(val, size, "%lld", ci->i_rsubdirs);
156}
157
Alex Elderaa4066e2012-01-23 15:49:28 -0600158static size_t ceph_vxattrcb_dir_rbytes(struct ceph_inode_info *ci, char *val,
Sage Weil355da1e2009-10-06 11:31:08 -0700159 size_t size)
160{
161 return snprintf(val, size, "%lld", ci->i_rbytes);
162}
163
Alex Elderaa4066e2012-01-23 15:49:28 -0600164static size_t ceph_vxattrcb_dir_rctime(struct ceph_inode_info *ci, char *val,
Sage Weil355da1e2009-10-06 11:31:08 -0700165 size_t size)
166{
Alex Elder3489b422012-03-08 16:50:09 -0600167 return snprintf(val, size, "%ld.09%ld", (long)ci->i_rctime.tv_sec,
Sage Weil355da1e2009-10-06 11:31:08 -0700168 (long)ci->i_rctime.tv_nsec);
169}
170
Sage Weil32ab0bd2013-01-19 16:46:32 -0800171
Alex Eldereb788082012-01-23 15:49:28 -0600172#define CEPH_XATTR_NAME(_type, _name) XATTR_CEPH_PREFIX #_type "." #_name
Sage Weil695b7112013-01-20 22:08:33 -0800173#define CEPH_XATTR_NAME2(_type, _name, _name2) \
174 XATTR_CEPH_PREFIX #_type "." #_name "." #_name2
Alex Eldereb788082012-01-23 15:49:28 -0600175
Sage Weil88601472013-01-31 11:53:27 -0800176#define XATTR_NAME_CEPH(_type, _name) \
177 { \
178 .name = CEPH_XATTR_NAME(_type, _name), \
179 .name_size = sizeof (CEPH_XATTR_NAME(_type, _name)), \
180 .getxattr_cb = ceph_vxattrcb_ ## _type ## _ ## _name, \
181 .readonly = true, \
182 .hidden = false, \
Sage Weilf36e4472013-01-20 21:59:29 -0800183 .exists_cb = NULL, \
Sage Weil88601472013-01-31 11:53:27 -0800184 }
Sage Weil695b7112013-01-20 22:08:33 -0800185#define XATTR_LAYOUT_FIELD(_type, _name, _field) \
186 { \
187 .name = CEPH_XATTR_NAME2(_type, _name, _field), \
188 .name_size = sizeof (CEPH_XATTR_NAME2(_type, _name, _field)), \
189 .getxattr_cb = ceph_vxattrcb_ ## _name ## _ ## _field, \
190 .readonly = false, \
191 .hidden = true, \
192 .exists_cb = ceph_vxattrcb_layout_exists, \
193 }
Alex Eldereb788082012-01-23 15:49:28 -0600194
Alex Elder881a5fa2012-01-23 15:49:28 -0600195static struct ceph_vxattr ceph_dir_vxattrs[] = {
Sage Weil1f08f2b2013-01-20 22:07:12 -0800196 {
197 .name = "ceph.dir.layout",
198 .name_size = sizeof("ceph.dir.layout"),
199 .getxattr_cb = ceph_vxattrcb_layout,
200 .readonly = false,
201 .hidden = false,
202 .exists_cb = ceph_vxattrcb_layout_exists,
203 },
Sage Weil695b7112013-01-20 22:08:33 -0800204 XATTR_LAYOUT_FIELD(dir, layout, stripe_unit),
205 XATTR_LAYOUT_FIELD(dir, layout, stripe_count),
206 XATTR_LAYOUT_FIELD(dir, layout, object_size),
207 XATTR_LAYOUT_FIELD(dir, layout, pool),
Alex Eldereb788082012-01-23 15:49:28 -0600208 XATTR_NAME_CEPH(dir, entries),
209 XATTR_NAME_CEPH(dir, files),
210 XATTR_NAME_CEPH(dir, subdirs),
211 XATTR_NAME_CEPH(dir, rentries),
212 XATTR_NAME_CEPH(dir, rfiles),
213 XATTR_NAME_CEPH(dir, rsubdirs),
214 XATTR_NAME_CEPH(dir, rbytes),
215 XATTR_NAME_CEPH(dir, rctime),
Alex Elder2c3dd4f2013-02-19 12:25:56 -0600216 { .name = NULL, 0 } /* Required table terminator */
Sage Weil355da1e2009-10-06 11:31:08 -0700217};
Alex Elder3ce6cd12012-01-23 15:49:28 -0600218static size_t ceph_dir_vxattrs_name_size; /* total size of all names */
Sage Weil355da1e2009-10-06 11:31:08 -0700219
220/* files */
221
Alex Elder881a5fa2012-01-23 15:49:28 -0600222static struct ceph_vxattr ceph_file_vxattrs[] = {
Sage Weil32ab0bd2013-01-19 16:46:32 -0800223 {
224 .name = "ceph.file.layout",
225 .name_size = sizeof("ceph.file.layout"),
226 .getxattr_cb = ceph_vxattrcb_layout,
227 .readonly = false,
228 .hidden = false,
229 .exists_cb = ceph_vxattrcb_layout_exists,
230 },
Sage Weil695b7112013-01-20 22:08:33 -0800231 XATTR_LAYOUT_FIELD(file, layout, stripe_unit),
232 XATTR_LAYOUT_FIELD(file, layout, stripe_count),
233 XATTR_LAYOUT_FIELD(file, layout, object_size),
234 XATTR_LAYOUT_FIELD(file, layout, pool),
Alex Elder2c3dd4f2013-02-19 12:25:56 -0600235 { .name = NULL, 0 } /* Required table terminator */
Sage Weil355da1e2009-10-06 11:31:08 -0700236};
Alex Elder3ce6cd12012-01-23 15:49:28 -0600237static size_t ceph_file_vxattrs_name_size; /* total size of all names */
Sage Weil355da1e2009-10-06 11:31:08 -0700238
Alex Elder881a5fa2012-01-23 15:49:28 -0600239static struct ceph_vxattr *ceph_inode_vxattrs(struct inode *inode)
Sage Weil355da1e2009-10-06 11:31:08 -0700240{
241 if (S_ISDIR(inode->i_mode))
242 return ceph_dir_vxattrs;
243 else if (S_ISREG(inode->i_mode))
244 return ceph_file_vxattrs;
245 return NULL;
246}
247
Alex Elder3ce6cd12012-01-23 15:49:28 -0600248static size_t ceph_vxattrs_name_size(struct ceph_vxattr *vxattrs)
249{
250 if (vxattrs == ceph_dir_vxattrs)
251 return ceph_dir_vxattrs_name_size;
252 if (vxattrs == ceph_file_vxattrs)
253 return ceph_file_vxattrs_name_size;
254 BUG();
255
256 return 0;
257}
258
259/*
260 * Compute the aggregate size (including terminating '\0') of all
261 * virtual extended attribute names in the given vxattr table.
262 */
263static size_t __init vxattrs_name_size(struct ceph_vxattr *vxattrs)
264{
265 struct ceph_vxattr *vxattr;
266 size_t size = 0;
267
268 for (vxattr = vxattrs; vxattr->name; vxattr++)
Sage Weil88601472013-01-31 11:53:27 -0800269 if (!vxattr->hidden)
270 size += vxattr->name_size;
Alex Elder3ce6cd12012-01-23 15:49:28 -0600271
272 return size;
273}
274
275/* Routines called at initialization and exit time */
276
277void __init ceph_xattr_init(void)
278{
279 ceph_dir_vxattrs_name_size = vxattrs_name_size(ceph_dir_vxattrs);
280 ceph_file_vxattrs_name_size = vxattrs_name_size(ceph_file_vxattrs);
281}
282
283void ceph_xattr_exit(void)
284{
285 ceph_dir_vxattrs_name_size = 0;
286 ceph_file_vxattrs_name_size = 0;
287}
288
Alex Elder881a5fa2012-01-23 15:49:28 -0600289static struct ceph_vxattr *ceph_match_vxattr(struct inode *inode,
Sage Weil355da1e2009-10-06 11:31:08 -0700290 const char *name)
291{
Alex Elder881a5fa2012-01-23 15:49:28 -0600292 struct ceph_vxattr *vxattr = ceph_inode_vxattrs(inode);
Alex Elder06476a62012-01-23 15:49:27 -0600293
294 if (vxattr) {
295 while (vxattr->name) {
296 if (!strcmp(vxattr->name, name))
297 return vxattr;
298 vxattr++;
299 }
300 }
301
Sage Weil355da1e2009-10-06 11:31:08 -0700302 return NULL;
303}
304
305static int __set_xattr(struct ceph_inode_info *ci,
306 const char *name, int name_len,
307 const char *val, int val_len,
308 int dirty,
309 int should_free_name, int should_free_val,
310 struct ceph_inode_xattr **newxattr)
311{
312 struct rb_node **p;
313 struct rb_node *parent = NULL;
314 struct ceph_inode_xattr *xattr = NULL;
315 int c;
316 int new = 0;
317
318 p = &ci->i_xattrs.index.rb_node;
319 while (*p) {
320 parent = *p;
321 xattr = rb_entry(parent, struct ceph_inode_xattr, node);
322 c = strncmp(name, xattr->name, min(name_len, xattr->name_len));
323 if (c < 0)
324 p = &(*p)->rb_left;
325 else if (c > 0)
326 p = &(*p)->rb_right;
327 else {
328 if (name_len == xattr->name_len)
329 break;
330 else if (name_len < xattr->name_len)
331 p = &(*p)->rb_left;
332 else
333 p = &(*p)->rb_right;
334 }
335 xattr = NULL;
336 }
337
338 if (!xattr) {
339 new = 1;
340 xattr = *newxattr;
341 xattr->name = name;
342 xattr->name_len = name_len;
343 xattr->should_free_name = should_free_name;
344
345 ci->i_xattrs.count++;
346 dout("__set_xattr count=%d\n", ci->i_xattrs.count);
347 } else {
348 kfree(*newxattr);
349 *newxattr = NULL;
350 if (xattr->should_free_val)
351 kfree((void *)xattr->val);
352
353 if (should_free_name) {
354 kfree((void *)name);
355 name = xattr->name;
356 }
357 ci->i_xattrs.names_size -= xattr->name_len;
358 ci->i_xattrs.vals_size -= xattr->val_len;
359 }
Sage Weil355da1e2009-10-06 11:31:08 -0700360 ci->i_xattrs.names_size += name_len;
361 ci->i_xattrs.vals_size += val_len;
362 if (val)
363 xattr->val = val;
364 else
365 xattr->val = "";
366
367 xattr->val_len = val_len;
368 xattr->dirty = dirty;
369 xattr->should_free_val = (val && should_free_val);
370
371 if (new) {
372 rb_link_node(&xattr->node, parent, p);
373 rb_insert_color(&xattr->node, &ci->i_xattrs.index);
374 dout("__set_xattr_val p=%p\n", p);
375 }
376
377 dout("__set_xattr_val added %llx.%llx xattr %p %s=%.*s\n",
378 ceph_vinop(&ci->vfs_inode), xattr, name, val_len, val);
379
380 return 0;
381}
382
383static struct ceph_inode_xattr *__get_xattr(struct ceph_inode_info *ci,
384 const char *name)
385{
386 struct rb_node **p;
387 struct rb_node *parent = NULL;
388 struct ceph_inode_xattr *xattr = NULL;
Sage Weil17db1432011-01-13 15:27:29 -0800389 int name_len = strlen(name);
Sage Weil355da1e2009-10-06 11:31:08 -0700390 int c;
391
392 p = &ci->i_xattrs.index.rb_node;
393 while (*p) {
394 parent = *p;
395 xattr = rb_entry(parent, struct ceph_inode_xattr, node);
396 c = strncmp(name, xattr->name, xattr->name_len);
Sage Weil17db1432011-01-13 15:27:29 -0800397 if (c == 0 && name_len > xattr->name_len)
398 c = 1;
Sage Weil355da1e2009-10-06 11:31:08 -0700399 if (c < 0)
400 p = &(*p)->rb_left;
401 else if (c > 0)
402 p = &(*p)->rb_right;
403 else {
404 dout("__get_xattr %s: found %.*s\n", name,
405 xattr->val_len, xattr->val);
406 return xattr;
407 }
408 }
409
410 dout("__get_xattr %s: not found\n", name);
411
412 return NULL;
413}
414
415static void __free_xattr(struct ceph_inode_xattr *xattr)
416{
417 BUG_ON(!xattr);
418
419 if (xattr->should_free_name)
420 kfree((void *)xattr->name);
421 if (xattr->should_free_val)
422 kfree((void *)xattr->val);
423
424 kfree(xattr);
425}
426
427static int __remove_xattr(struct ceph_inode_info *ci,
428 struct ceph_inode_xattr *xattr)
429{
430 if (!xattr)
431 return -EOPNOTSUPP;
432
433 rb_erase(&xattr->node, &ci->i_xattrs.index);
434
435 if (xattr->should_free_name)
436 kfree((void *)xattr->name);
437 if (xattr->should_free_val)
438 kfree((void *)xattr->val);
439
440 ci->i_xattrs.names_size -= xattr->name_len;
441 ci->i_xattrs.vals_size -= xattr->val_len;
442 ci->i_xattrs.count--;
443 kfree(xattr);
444
445 return 0;
446}
447
448static int __remove_xattr_by_name(struct ceph_inode_info *ci,
449 const char *name)
450{
451 struct rb_node **p;
452 struct ceph_inode_xattr *xattr;
453 int err;
454
455 p = &ci->i_xattrs.index.rb_node;
456 xattr = __get_xattr(ci, name);
457 err = __remove_xattr(ci, xattr);
458 return err;
459}
460
461static char *__copy_xattr_names(struct ceph_inode_info *ci,
462 char *dest)
463{
464 struct rb_node *p;
465 struct ceph_inode_xattr *xattr = NULL;
466
467 p = rb_first(&ci->i_xattrs.index);
468 dout("__copy_xattr_names count=%d\n", ci->i_xattrs.count);
469
470 while (p) {
471 xattr = rb_entry(p, struct ceph_inode_xattr, node);
472 memcpy(dest, xattr->name, xattr->name_len);
473 dest[xattr->name_len] = '\0';
474
475 dout("dest=%s %p (%s) (%d/%d)\n", dest, xattr, xattr->name,
476 xattr->name_len, ci->i_xattrs.names_size);
477
478 dest += xattr->name_len + 1;
479 p = rb_next(p);
480 }
481
482 return dest;
483}
484
485void __ceph_destroy_xattrs(struct ceph_inode_info *ci)
486{
487 struct rb_node *p, *tmp;
488 struct ceph_inode_xattr *xattr = NULL;
489
490 p = rb_first(&ci->i_xattrs.index);
491
492 dout("__ceph_destroy_xattrs p=%p\n", p);
493
494 while (p) {
495 xattr = rb_entry(p, struct ceph_inode_xattr, node);
496 tmp = p;
497 p = rb_next(tmp);
498 dout("__ceph_destroy_xattrs next p=%p (%.*s)\n", p,
499 xattr->name_len, xattr->name);
500 rb_erase(tmp, &ci->i_xattrs.index);
501
502 __free_xattr(xattr);
503 }
504
505 ci->i_xattrs.names_size = 0;
506 ci->i_xattrs.vals_size = 0;
507 ci->i_xattrs.index_version = 0;
508 ci->i_xattrs.count = 0;
509 ci->i_xattrs.index = RB_ROOT;
510}
511
512static int __build_xattrs(struct inode *inode)
Sage Weilbe655592011-11-30 09:47:09 -0800513 __releases(ci->i_ceph_lock)
514 __acquires(ci->i_ceph_lock)
Sage Weil355da1e2009-10-06 11:31:08 -0700515{
516 u32 namelen;
517 u32 numattr = 0;
518 void *p, *end;
519 u32 len;
520 const char *name, *val;
521 struct ceph_inode_info *ci = ceph_inode(inode);
522 int xattr_version;
523 struct ceph_inode_xattr **xattrs = NULL;
Sage Weil63ff78b2009-11-01 17:51:15 -0800524 int err = 0;
Sage Weil355da1e2009-10-06 11:31:08 -0700525 int i;
526
527 dout("__build_xattrs() len=%d\n",
528 ci->i_xattrs.blob ? (int)ci->i_xattrs.blob->vec.iov_len : 0);
529
530 if (ci->i_xattrs.index_version >= ci->i_xattrs.version)
531 return 0; /* already built */
532
533 __ceph_destroy_xattrs(ci);
534
535start:
536 /* updated internal xattr rb tree */
537 if (ci->i_xattrs.blob && ci->i_xattrs.blob->vec.iov_len > 4) {
538 p = ci->i_xattrs.blob->vec.iov_base;
539 end = p + ci->i_xattrs.blob->vec.iov_len;
540 ceph_decode_32_safe(&p, end, numattr, bad);
541 xattr_version = ci->i_xattrs.version;
Sage Weilbe655592011-11-30 09:47:09 -0800542 spin_unlock(&ci->i_ceph_lock);
Sage Weil355da1e2009-10-06 11:31:08 -0700543
544 xattrs = kcalloc(numattr, sizeof(struct ceph_xattr *),
545 GFP_NOFS);
546 err = -ENOMEM;
547 if (!xattrs)
548 goto bad_lock;
549 memset(xattrs, 0, numattr*sizeof(struct ceph_xattr *));
550 for (i = 0; i < numattr; i++) {
551 xattrs[i] = kmalloc(sizeof(struct ceph_inode_xattr),
552 GFP_NOFS);
553 if (!xattrs[i])
554 goto bad_lock;
555 }
556
Sage Weilbe655592011-11-30 09:47:09 -0800557 spin_lock(&ci->i_ceph_lock);
Sage Weil355da1e2009-10-06 11:31:08 -0700558 if (ci->i_xattrs.version != xattr_version) {
559 /* lost a race, retry */
560 for (i = 0; i < numattr; i++)
561 kfree(xattrs[i]);
562 kfree(xattrs);
Alan Cox21ec6ff2012-07-20 08:18:36 -0500563 xattrs = NULL;
Sage Weil355da1e2009-10-06 11:31:08 -0700564 goto start;
565 }
566 err = -EIO;
567 while (numattr--) {
568 ceph_decode_32_safe(&p, end, len, bad);
569 namelen = len;
570 name = p;
571 p += len;
572 ceph_decode_32_safe(&p, end, len, bad);
573 val = p;
574 p += len;
575
576 err = __set_xattr(ci, name, namelen, val, len,
577 0, 0, 0, &xattrs[numattr]);
578
579 if (err < 0)
580 goto bad;
581 }
582 kfree(xattrs);
583 }
584 ci->i_xattrs.index_version = ci->i_xattrs.version;
585 ci->i_xattrs.dirty = false;
586
587 return err;
588bad_lock:
Sage Weilbe655592011-11-30 09:47:09 -0800589 spin_lock(&ci->i_ceph_lock);
Sage Weil355da1e2009-10-06 11:31:08 -0700590bad:
591 if (xattrs) {
592 for (i = 0; i < numattr; i++)
593 kfree(xattrs[i]);
594 kfree(xattrs);
595 }
596 ci->i_xattrs.names_size = 0;
597 return err;
598}
599
600static int __get_required_blob_size(struct ceph_inode_info *ci, int name_size,
601 int val_size)
602{
603 /*
604 * 4 bytes for the length, and additional 4 bytes per each xattr name,
605 * 4 bytes per each value
606 */
607 int size = 4 + ci->i_xattrs.count*(4 + 4) +
608 ci->i_xattrs.names_size +
609 ci->i_xattrs.vals_size;
610 dout("__get_required_blob_size c=%d names.size=%d vals.size=%d\n",
611 ci->i_xattrs.count, ci->i_xattrs.names_size,
612 ci->i_xattrs.vals_size);
613
614 if (name_size)
615 size += 4 + 4 + name_size + val_size;
616
617 return size;
618}
619
620/*
621 * If there are dirty xattrs, reencode xattrs into the prealloc_blob
622 * and swap into place.
623 */
624void __ceph_build_xattrs_blob(struct ceph_inode_info *ci)
625{
626 struct rb_node *p;
627 struct ceph_inode_xattr *xattr = NULL;
628 void *dest;
629
630 dout("__build_xattrs_blob %p\n", &ci->vfs_inode);
631 if (ci->i_xattrs.dirty) {
632 int need = __get_required_blob_size(ci, 0, 0);
633
634 BUG_ON(need > ci->i_xattrs.prealloc_blob->alloc_len);
635
636 p = rb_first(&ci->i_xattrs.index);
637 dest = ci->i_xattrs.prealloc_blob->vec.iov_base;
638
639 ceph_encode_32(&dest, ci->i_xattrs.count);
640 while (p) {
641 xattr = rb_entry(p, struct ceph_inode_xattr, node);
642
643 ceph_encode_32(&dest, xattr->name_len);
644 memcpy(dest, xattr->name, xattr->name_len);
645 dest += xattr->name_len;
646 ceph_encode_32(&dest, xattr->val_len);
647 memcpy(dest, xattr->val, xattr->val_len);
648 dest += xattr->val_len;
649
650 p = rb_next(p);
651 }
652
653 /* adjust buffer len; it may be larger than we need */
654 ci->i_xattrs.prealloc_blob->vec.iov_len =
655 dest - ci->i_xattrs.prealloc_blob->vec.iov_base;
656
Sage Weilb6c1d5b2009-12-07 12:17:17 -0800657 if (ci->i_xattrs.blob)
658 ceph_buffer_put(ci->i_xattrs.blob);
Sage Weil355da1e2009-10-06 11:31:08 -0700659 ci->i_xattrs.blob = ci->i_xattrs.prealloc_blob;
660 ci->i_xattrs.prealloc_blob = NULL;
661 ci->i_xattrs.dirty = false;
Sage Weil4a625be2010-08-22 15:03:56 -0700662 ci->i_xattrs.version++;
Sage Weil355da1e2009-10-06 11:31:08 -0700663 }
664}
665
666ssize_t ceph_getxattr(struct dentry *dentry, const char *name, void *value,
667 size_t size)
668{
669 struct inode *inode = dentry->d_inode;
670 struct ceph_inode_info *ci = ceph_inode(inode);
Sage Weil355da1e2009-10-06 11:31:08 -0700671 int err;
672 struct ceph_inode_xattr *xattr;
Alex Elder881a5fa2012-01-23 15:49:28 -0600673 struct ceph_vxattr *vxattr = NULL;
Sage Weil355da1e2009-10-06 11:31:08 -0700674
675 if (!ceph_is_valid_xattr(name))
676 return -ENODATA;
677
Sage Weil355da1e2009-10-06 11:31:08 -0700678
Sage Weil0bee82f2013-01-20 22:00:58 -0800679 /* let's see if a virtual xattr was requested */
680 vxattr = ceph_match_vxattr(inode, name);
681 if (vxattr && !(vxattr->exists_cb && !vxattr->exists_cb(ci))) {
682 err = vxattr->getxattr_cb(ci, value, size);
majianpenga1dc1932013-06-19 14:58:10 +0800683 return err;
Sage Weil0bee82f2013-01-20 22:00:58 -0800684 }
685
majianpenga1dc1932013-06-19 14:58:10 +0800686 spin_lock(&ci->i_ceph_lock);
687 dout("getxattr %p ver=%lld index_ver=%lld\n", inode,
688 ci->i_xattrs.version, ci->i_xattrs.index_version);
689
Sage Weil355da1e2009-10-06 11:31:08 -0700690 if (__ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 1) &&
691 (ci->i_xattrs.index_version >= ci->i_xattrs.version)) {
692 goto get_xattr;
693 } else {
Sage Weilbe655592011-11-30 09:47:09 -0800694 spin_unlock(&ci->i_ceph_lock);
Sage Weil355da1e2009-10-06 11:31:08 -0700695 /* get xattrs from mds (if we don't already have them) */
696 err = ceph_do_getattr(inode, CEPH_STAT_CAP_XATTR);
697 if (err)
698 return err;
699 }
700
Sage Weilbe655592011-11-30 09:47:09 -0800701 spin_lock(&ci->i_ceph_lock);
Sage Weil355da1e2009-10-06 11:31:08 -0700702
Sage Weil355da1e2009-10-06 11:31:08 -0700703 err = __build_xattrs(inode);
704 if (err < 0)
705 goto out;
706
707get_xattr:
708 err = -ENODATA; /* == ENOATTR */
709 xattr = __get_xattr(ci, name);
Sage Weil0bee82f2013-01-20 22:00:58 -0800710 if (!xattr)
Sage Weil355da1e2009-10-06 11:31:08 -0700711 goto out;
Sage Weil355da1e2009-10-06 11:31:08 -0700712
713 err = -ERANGE;
714 if (size && size < xattr->val_len)
715 goto out;
716
717 err = xattr->val_len;
718 if (size == 0)
719 goto out;
720
721 memcpy(value, xattr->val, xattr->val_len);
722
723out:
Sage Weilbe655592011-11-30 09:47:09 -0800724 spin_unlock(&ci->i_ceph_lock);
Sage Weil355da1e2009-10-06 11:31:08 -0700725 return err;
726}
727
728ssize_t ceph_listxattr(struct dentry *dentry, char *names, size_t size)
729{
730 struct inode *inode = dentry->d_inode;
731 struct ceph_inode_info *ci = ceph_inode(inode);
Alex Elder881a5fa2012-01-23 15:49:28 -0600732 struct ceph_vxattr *vxattrs = ceph_inode_vxattrs(inode);
Sage Weil355da1e2009-10-06 11:31:08 -0700733 u32 vir_namelen = 0;
734 u32 namelen;
735 int err;
736 u32 len;
737 int i;
738
Sage Weilbe655592011-11-30 09:47:09 -0800739 spin_lock(&ci->i_ceph_lock);
Sage Weil355da1e2009-10-06 11:31:08 -0700740 dout("listxattr %p ver=%lld index_ver=%lld\n", inode,
741 ci->i_xattrs.version, ci->i_xattrs.index_version);
742
743 if (__ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 1) &&
Henry C Changbddfa3c2010-04-29 09:32:28 -0700744 (ci->i_xattrs.index_version >= ci->i_xattrs.version)) {
Sage Weil355da1e2009-10-06 11:31:08 -0700745 goto list_xattr;
746 } else {
Sage Weilbe655592011-11-30 09:47:09 -0800747 spin_unlock(&ci->i_ceph_lock);
Sage Weil355da1e2009-10-06 11:31:08 -0700748 err = ceph_do_getattr(inode, CEPH_STAT_CAP_XATTR);
749 if (err)
750 return err;
751 }
752
Sage Weilbe655592011-11-30 09:47:09 -0800753 spin_lock(&ci->i_ceph_lock);
Sage Weil355da1e2009-10-06 11:31:08 -0700754
755 err = __build_xattrs(inode);
756 if (err < 0)
757 goto out;
758
759list_xattr:
Alex Elder3ce6cd12012-01-23 15:49:28 -0600760 /*
761 * Start with virtual dir xattr names (if any) (including
762 * terminating '\0' characters for each).
763 */
764 vir_namelen = ceph_vxattrs_name_size(vxattrs);
765
Sage Weil355da1e2009-10-06 11:31:08 -0700766 /* adding 1 byte per each variable due to the null termination */
Sage Weilb65917d2013-01-20 22:02:39 -0800767 namelen = ci->i_xattrs.names_size + ci->i_xattrs.count;
Sage Weil355da1e2009-10-06 11:31:08 -0700768 err = -ERANGE;
Sage Weilb65917d2013-01-20 22:02:39 -0800769 if (size && vir_namelen + namelen > size)
Sage Weil355da1e2009-10-06 11:31:08 -0700770 goto out;
771
Sage Weilb65917d2013-01-20 22:02:39 -0800772 err = namelen + vir_namelen;
Sage Weil355da1e2009-10-06 11:31:08 -0700773 if (size == 0)
774 goto out;
775
776 names = __copy_xattr_names(ci, names);
777
778 /* virtual xattr names, too */
Sage Weilb65917d2013-01-20 22:02:39 -0800779 err = namelen;
780 if (vxattrs) {
Sage Weil355da1e2009-10-06 11:31:08 -0700781 for (i = 0; vxattrs[i].name; i++) {
Sage Weilb65917d2013-01-20 22:02:39 -0800782 if (!vxattrs[i].hidden &&
783 !(vxattrs[i].exists_cb &&
784 !vxattrs[i].exists_cb(ci))) {
785 len = sprintf(names, "%s", vxattrs[i].name);
786 names += len + 1;
787 err += len + 1;
788 }
Sage Weil355da1e2009-10-06 11:31:08 -0700789 }
Sage Weilb65917d2013-01-20 22:02:39 -0800790 }
Sage Weil355da1e2009-10-06 11:31:08 -0700791
792out:
Sage Weilbe655592011-11-30 09:47:09 -0800793 spin_unlock(&ci->i_ceph_lock);
Sage Weil355da1e2009-10-06 11:31:08 -0700794 return err;
795}
796
797static int ceph_sync_setxattr(struct dentry *dentry, const char *name,
798 const char *value, size_t size, int flags)
799{
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700800 struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb);
Sage Weil355da1e2009-10-06 11:31:08 -0700801 struct inode *inode = dentry->d_inode;
802 struct ceph_inode_info *ci = ceph_inode(inode);
Sage Weil5f21c962011-07-26 11:30:29 -0700803 struct inode *parent_inode;
Sage Weil355da1e2009-10-06 11:31:08 -0700804 struct ceph_mds_request *req;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700805 struct ceph_mds_client *mdsc = fsc->mdsc;
Sage Weil355da1e2009-10-06 11:31:08 -0700806 int err;
807 int i, nr_pages;
808 struct page **pages = NULL;
809 void *kaddr;
810
811 /* copy value into some pages */
812 nr_pages = calc_pages_for(0, size);
813 if (nr_pages) {
814 pages = kmalloc(sizeof(pages[0])*nr_pages, GFP_NOFS);
815 if (!pages)
816 return -ENOMEM;
817 err = -ENOMEM;
818 for (i = 0; i < nr_pages; i++) {
Yehuda Sadeh31459fe2010-03-17 13:54:02 -0700819 pages[i] = __page_cache_alloc(GFP_NOFS);
Sage Weil355da1e2009-10-06 11:31:08 -0700820 if (!pages[i]) {
821 nr_pages = i;
822 goto out;
823 }
824 kaddr = kmap(pages[i]);
825 memcpy(kaddr, value + i*PAGE_CACHE_SIZE,
826 min(PAGE_CACHE_SIZE, size-i*PAGE_CACHE_SIZE));
827 }
828 }
829
830 dout("setxattr value=%.*s\n", (int)size, value);
831
832 /* do request */
833 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETXATTR,
834 USE_AUTH_MDS);
Julia Lawall60d87732009-11-21 12:53:08 +0100835 if (IS_ERR(req)) {
836 err = PTR_ERR(req);
837 goto out;
838 }
Sage Weil70b666c2011-05-27 09:24:26 -0700839 req->r_inode = inode;
840 ihold(inode);
Sage Weil355da1e2009-10-06 11:31:08 -0700841 req->r_inode_drop = CEPH_CAP_XATTR_SHARED;
842 req->r_num_caps = 1;
843 req->r_args.setxattr.flags = cpu_to_le32(flags);
844 req->r_path2 = kstrdup(name, GFP_NOFS);
845
846 req->r_pages = pages;
847 req->r_num_pages = nr_pages;
848 req->r_data_len = size;
849
850 dout("xattr.ver (before): %lld\n", ci->i_xattrs.version);
Sage Weil5f21c962011-07-26 11:30:29 -0700851 parent_inode = ceph_get_dentry_parent_inode(dentry);
Sage Weil355da1e2009-10-06 11:31:08 -0700852 err = ceph_mdsc_do_request(mdsc, parent_inode, req);
Sage Weil5f21c962011-07-26 11:30:29 -0700853 iput(parent_inode);
Sage Weil355da1e2009-10-06 11:31:08 -0700854 ceph_mdsc_put_request(req);
855 dout("xattr.ver (after): %lld\n", ci->i_xattrs.version);
856
857out:
858 if (pages) {
859 for (i = 0; i < nr_pages; i++)
860 __free_page(pages[i]);
861 kfree(pages);
862 }
863 return err;
864}
865
866int ceph_setxattr(struct dentry *dentry, const char *name,
867 const void *value, size_t size, int flags)
868{
869 struct inode *inode = dentry->d_inode;
Alex Elder881a5fa2012-01-23 15:49:28 -0600870 struct ceph_vxattr *vxattr;
Sage Weil355da1e2009-10-06 11:31:08 -0700871 struct ceph_inode_info *ci = ceph_inode(inode);
Alex Elder18fa8b32012-01-23 15:49:28 -0600872 int issued;
Sage Weil355da1e2009-10-06 11:31:08 -0700873 int err;
Alex Elder18fa8b32012-01-23 15:49:28 -0600874 int dirty;
Sage Weil355da1e2009-10-06 11:31:08 -0700875 int name_len = strlen(name);
876 int val_len = size;
877 char *newname = NULL;
878 char *newval = NULL;
879 struct ceph_inode_xattr *xattr = NULL;
Sage Weil355da1e2009-10-06 11:31:08 -0700880 int required_blob_size;
881
882 if (ceph_snap(inode) != CEPH_NOSNAP)
883 return -EROFS;
884
885 if (!ceph_is_valid_xattr(name))
886 return -EOPNOTSUPP;
887
Alex Elder06476a62012-01-23 15:49:27 -0600888 vxattr = ceph_match_vxattr(inode, name);
889 if (vxattr && vxattr->readonly)
890 return -EOPNOTSUPP;
Sage Weil355da1e2009-10-06 11:31:08 -0700891
Sage Weil3adf6542013-01-31 11:53:41 -0800892 /* pass any unhandled ceph.* xattrs through to the MDS */
893 if (!strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN))
894 goto do_sync_unlocked;
895
Sage Weil355da1e2009-10-06 11:31:08 -0700896 /* preallocate memory for xattr name, value, index node */
897 err = -ENOMEM;
Julia Lawall61413c22010-10-17 21:55:21 +0200898 newname = kmemdup(name, name_len + 1, GFP_NOFS);
Sage Weil355da1e2009-10-06 11:31:08 -0700899 if (!newname)
900 goto out;
Sage Weil355da1e2009-10-06 11:31:08 -0700901
902 if (val_len) {
Alex Elderb829c192012-01-23 15:49:27 -0600903 newval = kmemdup(value, val_len, GFP_NOFS);
Sage Weil355da1e2009-10-06 11:31:08 -0700904 if (!newval)
905 goto out;
Sage Weil355da1e2009-10-06 11:31:08 -0700906 }
907
908 xattr = kmalloc(sizeof(struct ceph_inode_xattr), GFP_NOFS);
909 if (!xattr)
910 goto out;
911
Sage Weilbe655592011-11-30 09:47:09 -0800912 spin_lock(&ci->i_ceph_lock);
Sage Weil355da1e2009-10-06 11:31:08 -0700913retry:
914 issued = __ceph_caps_issued(ci, NULL);
Alex Elder18fa8b32012-01-23 15:49:28 -0600915 dout("setxattr %p issued %s\n", inode, ceph_cap_string(issued));
Sage Weil355da1e2009-10-06 11:31:08 -0700916 if (!(issued & CEPH_CAP_XATTR_EXCL))
917 goto do_sync;
918 __build_xattrs(inode);
919
920 required_blob_size = __get_required_blob_size(ci, name_len, val_len);
921
922 if (!ci->i_xattrs.prealloc_blob ||
923 required_blob_size > ci->i_xattrs.prealloc_blob->alloc_len) {
Alex Elder18fa8b32012-01-23 15:49:28 -0600924 struct ceph_buffer *blob;
Sage Weil355da1e2009-10-06 11:31:08 -0700925
Sage Weilbe655592011-11-30 09:47:09 -0800926 spin_unlock(&ci->i_ceph_lock);
Sage Weil355da1e2009-10-06 11:31:08 -0700927 dout(" preaallocating new blob size=%d\n", required_blob_size);
Sage Weilb6c1d5b2009-12-07 12:17:17 -0800928 blob = ceph_buffer_new(required_blob_size, GFP_NOFS);
Sage Weil355da1e2009-10-06 11:31:08 -0700929 if (!blob)
930 goto out;
Sage Weilbe655592011-11-30 09:47:09 -0800931 spin_lock(&ci->i_ceph_lock);
Sage Weilb6c1d5b2009-12-07 12:17:17 -0800932 if (ci->i_xattrs.prealloc_blob)
933 ceph_buffer_put(ci->i_xattrs.prealloc_blob);
Sage Weil355da1e2009-10-06 11:31:08 -0700934 ci->i_xattrs.prealloc_blob = blob;
935 goto retry;
936 }
937
Sage Weil355da1e2009-10-06 11:31:08 -0700938 err = __set_xattr(ci, newname, name_len, newval,
939 val_len, 1, 1, 1, &xattr);
Alex Elder18fa8b32012-01-23 15:49:28 -0600940
Sage Weilfca65b42011-05-04 11:33:47 -0700941 dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_XATTR_EXCL);
Sage Weil355da1e2009-10-06 11:31:08 -0700942 ci->i_xattrs.dirty = true;
943 inode->i_ctime = CURRENT_TIME;
Alex Elder18fa8b32012-01-23 15:49:28 -0600944
Sage Weilbe655592011-11-30 09:47:09 -0800945 spin_unlock(&ci->i_ceph_lock);
Sage Weilfca65b42011-05-04 11:33:47 -0700946 if (dirty)
947 __mark_inode_dirty(inode, dirty);
Sage Weil355da1e2009-10-06 11:31:08 -0700948 return err;
949
950do_sync:
Sage Weilbe655592011-11-30 09:47:09 -0800951 spin_unlock(&ci->i_ceph_lock);
Sage Weil3adf6542013-01-31 11:53:41 -0800952do_sync_unlocked:
Sage Weil355da1e2009-10-06 11:31:08 -0700953 err = ceph_sync_setxattr(dentry, name, value, size, flags);
954out:
955 kfree(newname);
956 kfree(newval);
957 kfree(xattr);
958 return err;
959}
960
961static int ceph_send_removexattr(struct dentry *dentry, const char *name)
962{
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700963 struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb);
964 struct ceph_mds_client *mdsc = fsc->mdsc;
Sage Weil355da1e2009-10-06 11:31:08 -0700965 struct inode *inode = dentry->d_inode;
Sage Weil5f21c962011-07-26 11:30:29 -0700966 struct inode *parent_inode;
Sage Weil355da1e2009-10-06 11:31:08 -0700967 struct ceph_mds_request *req;
968 int err;
969
970 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_RMXATTR,
971 USE_AUTH_MDS);
972 if (IS_ERR(req))
973 return PTR_ERR(req);
Sage Weil70b666c2011-05-27 09:24:26 -0700974 req->r_inode = inode;
975 ihold(inode);
Sage Weil355da1e2009-10-06 11:31:08 -0700976 req->r_inode_drop = CEPH_CAP_XATTR_SHARED;
977 req->r_num_caps = 1;
978 req->r_path2 = kstrdup(name, GFP_NOFS);
979
Sage Weil5f21c962011-07-26 11:30:29 -0700980 parent_inode = ceph_get_dentry_parent_inode(dentry);
Sage Weil355da1e2009-10-06 11:31:08 -0700981 err = ceph_mdsc_do_request(mdsc, parent_inode, req);
Sage Weil5f21c962011-07-26 11:30:29 -0700982 iput(parent_inode);
Sage Weil355da1e2009-10-06 11:31:08 -0700983 ceph_mdsc_put_request(req);
984 return err;
985}
986
987int ceph_removexattr(struct dentry *dentry, const char *name)
988{
989 struct inode *inode = dentry->d_inode;
Alex Elder881a5fa2012-01-23 15:49:28 -0600990 struct ceph_vxattr *vxattr;
Sage Weil355da1e2009-10-06 11:31:08 -0700991 struct ceph_inode_info *ci = ceph_inode(inode);
Sage Weil355da1e2009-10-06 11:31:08 -0700992 int issued;
993 int err;
Alex Elder83eb26a2012-01-11 17:41:01 -0800994 int required_blob_size;
Sage Weilfca65b42011-05-04 11:33:47 -0700995 int dirty;
Sage Weil355da1e2009-10-06 11:31:08 -0700996
997 if (ceph_snap(inode) != CEPH_NOSNAP)
998 return -EROFS;
999
1000 if (!ceph_is_valid_xattr(name))
1001 return -EOPNOTSUPP;
1002
Alex Elder06476a62012-01-23 15:49:27 -06001003 vxattr = ceph_match_vxattr(inode, name);
1004 if (vxattr && vxattr->readonly)
1005 return -EOPNOTSUPP;
Sage Weil355da1e2009-10-06 11:31:08 -07001006
Sage Weild421acb2013-01-20 21:55:30 -08001007 /* pass any unhandled ceph.* xattrs through to the MDS */
1008 if (!strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN))
1009 goto do_sync_unlocked;
1010
Alex Elder83eb26a2012-01-11 17:41:01 -08001011 err = -ENOMEM;
Sage Weilbe655592011-11-30 09:47:09 -08001012 spin_lock(&ci->i_ceph_lock);
Alex Elder83eb26a2012-01-11 17:41:01 -08001013retry:
Sage Weil355da1e2009-10-06 11:31:08 -07001014 issued = __ceph_caps_issued(ci, NULL);
1015 dout("removexattr %p issued %s\n", inode, ceph_cap_string(issued));
1016
1017 if (!(issued & CEPH_CAP_XATTR_EXCL))
1018 goto do_sync;
Alex Elder18fa8b32012-01-23 15:49:28 -06001019 __build_xattrs(inode);
Sage Weil355da1e2009-10-06 11:31:08 -07001020
Alex Elder83eb26a2012-01-11 17:41:01 -08001021 required_blob_size = __get_required_blob_size(ci, 0, 0);
1022
1023 if (!ci->i_xattrs.prealloc_blob ||
1024 required_blob_size > ci->i_xattrs.prealloc_blob->alloc_len) {
1025 struct ceph_buffer *blob;
1026
1027 spin_unlock(&ci->i_ceph_lock);
1028 dout(" preaallocating new blob size=%d\n", required_blob_size);
1029 blob = ceph_buffer_new(required_blob_size, GFP_NOFS);
1030 if (!blob)
1031 goto out;
1032 spin_lock(&ci->i_ceph_lock);
1033 if (ci->i_xattrs.prealloc_blob)
1034 ceph_buffer_put(ci->i_xattrs.prealloc_blob);
1035 ci->i_xattrs.prealloc_blob = blob;
1036 goto retry;
1037 }
1038
Sage Weil355da1e2009-10-06 11:31:08 -07001039 err = __remove_xattr_by_name(ceph_inode(inode), name);
Alex Elder18fa8b32012-01-23 15:49:28 -06001040
Sage Weilfca65b42011-05-04 11:33:47 -07001041 dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_XATTR_EXCL);
Sage Weil355da1e2009-10-06 11:31:08 -07001042 ci->i_xattrs.dirty = true;
1043 inode->i_ctime = CURRENT_TIME;
Sage Weilbe655592011-11-30 09:47:09 -08001044 spin_unlock(&ci->i_ceph_lock);
Sage Weilfca65b42011-05-04 11:33:47 -07001045 if (dirty)
1046 __mark_inode_dirty(inode, dirty);
Sage Weil355da1e2009-10-06 11:31:08 -07001047 return err;
1048do_sync:
Sage Weilbe655592011-11-30 09:47:09 -08001049 spin_unlock(&ci->i_ceph_lock);
Sage Weild421acb2013-01-20 21:55:30 -08001050do_sync_unlocked:
Sage Weil355da1e2009-10-06 11:31:08 -07001051 err = ceph_send_removexattr(dentry, name);
Alex Elder83eb26a2012-01-11 17:41:01 -08001052out:
Sage Weil355da1e2009-10-06 11:31:08 -07001053 return err;
1054}
1055