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Sage Weil355da1e2009-10-06 11:31:08 -07001#include "ceph_debug.h"
2
3#include <linux/module.h>
4#include <linux/fs.h>
5#include <linux/smp_lock.h>
6#include <linux/slab.h>
7#include <linux/string.h>
8#include <linux/uaccess.h>
9#include <linux/kernel.h>
10#include <linux/namei.h>
11#include <linux/writeback.h>
12#include <linux/vmalloc.h>
Yehuda Sadehc9af9fb2010-02-19 00:10:11 +000013#include <linux/pagevec.h>
Sage Weil355da1e2009-10-06 11:31:08 -070014
15#include "super.h"
16#include "decode.h"
17
18/*
19 * Ceph inode operations
20 *
21 * Implement basic inode helpers (get, alloc) and inode ops (getattr,
22 * setattr, etc.), xattr helpers, and helpers for assimilating
23 * metadata returned by the MDS into our cache.
24 *
25 * Also define helpers for doing asynchronous writeback, invalidation,
26 * and truncation for the benefit of those who can't afford to block
27 * (typically because they are in the message handler path).
28 */
29
30static const struct inode_operations ceph_symlink_iops;
31
Sage Weil3c6f6b72010-02-09 15:24:44 -080032static void ceph_invalidate_work(struct work_struct *work);
33static void ceph_writeback_work(struct work_struct *work);
34static void ceph_vmtruncate_work(struct work_struct *work);
Sage Weil355da1e2009-10-06 11:31:08 -070035
36/*
37 * find or create an inode, given the ceph ino number
38 */
39struct inode *ceph_get_inode(struct super_block *sb, struct ceph_vino vino)
40{
41 struct inode *inode;
42 ino_t t = ceph_vino_to_ino(vino);
43
44 inode = iget5_locked(sb, t, ceph_ino_compare, ceph_set_ino_cb, &vino);
45 if (inode == NULL)
46 return ERR_PTR(-ENOMEM);
47 if (inode->i_state & I_NEW) {
48 dout("get_inode created new inode %p %llx.%llx ino %llx\n",
49 inode, ceph_vinop(inode), (u64)inode->i_ino);
50 unlock_new_inode(inode);
51 }
52
53 dout("get_inode on %lu=%llx.%llx got %p\n", inode->i_ino, vino.ino,
54 vino.snap, inode);
55 return inode;
56}
57
58/*
59 * get/constuct snapdir inode for a given directory
60 */
61struct inode *ceph_get_snapdir(struct inode *parent)
62{
63 struct ceph_vino vino = {
64 .ino = ceph_ino(parent),
65 .snap = CEPH_SNAPDIR,
66 };
67 struct inode *inode = ceph_get_inode(parent->i_sb, vino);
Sage Weilb377ff12009-11-11 15:22:37 -080068 struct ceph_inode_info *ci = ceph_inode(inode);
Sage Weil355da1e2009-10-06 11:31:08 -070069
70 BUG_ON(!S_ISDIR(parent->i_mode));
71 if (IS_ERR(inode))
72 return ERR_PTR(PTR_ERR(inode));
73 inode->i_mode = parent->i_mode;
74 inode->i_uid = parent->i_uid;
75 inode->i_gid = parent->i_gid;
76 inode->i_op = &ceph_dir_iops;
77 inode->i_fop = &ceph_dir_fops;
Sage Weilb377ff12009-11-11 15:22:37 -080078 ci->i_snap_caps = CEPH_CAP_PIN; /* so we can open */
79 ci->i_rbytes = 0;
Sage Weil355da1e2009-10-06 11:31:08 -070080 return inode;
81}
82
83const struct inode_operations ceph_file_iops = {
84 .permission = ceph_permission,
85 .setattr = ceph_setattr,
86 .getattr = ceph_getattr,
87 .setxattr = ceph_setxattr,
88 .getxattr = ceph_getxattr,
89 .listxattr = ceph_listxattr,
90 .removexattr = ceph_removexattr,
91};
92
93
94/*
95 * We use a 'frag tree' to keep track of the MDS's directory fragments
96 * for a given inode (usually there is just a single fragment). We
97 * need to know when a child frag is delegated to a new MDS, or when
98 * it is flagged as replicated, so we can direct our requests
99 * accordingly.
100 */
101
102/*
103 * find/create a frag in the tree
104 */
105static struct ceph_inode_frag *__get_or_create_frag(struct ceph_inode_info *ci,
106 u32 f)
107{
108 struct rb_node **p;
109 struct rb_node *parent = NULL;
110 struct ceph_inode_frag *frag;
111 int c;
112
113 p = &ci->i_fragtree.rb_node;
114 while (*p) {
115 parent = *p;
116 frag = rb_entry(parent, struct ceph_inode_frag, node);
117 c = ceph_frag_compare(f, frag->frag);
118 if (c < 0)
119 p = &(*p)->rb_left;
120 else if (c > 0)
121 p = &(*p)->rb_right;
122 else
123 return frag;
124 }
125
126 frag = kmalloc(sizeof(*frag), GFP_NOFS);
127 if (!frag) {
128 pr_err("__get_or_create_frag ENOMEM on %p %llx.%llx "
129 "frag %x\n", &ci->vfs_inode,
130 ceph_vinop(&ci->vfs_inode), f);
131 return ERR_PTR(-ENOMEM);
132 }
133 frag->frag = f;
134 frag->split_by = 0;
135 frag->mds = -1;
136 frag->ndist = 0;
137
138 rb_link_node(&frag->node, parent, p);
139 rb_insert_color(&frag->node, &ci->i_fragtree);
140
141 dout("get_or_create_frag added %llx.%llx frag %x\n",
142 ceph_vinop(&ci->vfs_inode), f);
143 return frag;
144}
145
146/*
147 * find a specific frag @f
148 */
149struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci, u32 f)
150{
151 struct rb_node *n = ci->i_fragtree.rb_node;
152
153 while (n) {
154 struct ceph_inode_frag *frag =
155 rb_entry(n, struct ceph_inode_frag, node);
156 int c = ceph_frag_compare(f, frag->frag);
157 if (c < 0)
158 n = n->rb_left;
159 else if (c > 0)
160 n = n->rb_right;
161 else
162 return frag;
163 }
164 return NULL;
165}
166
167/*
168 * Choose frag containing the given value @v. If @pfrag is
169 * specified, copy the frag delegation info to the caller if
170 * it is present.
171 */
172u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v,
173 struct ceph_inode_frag *pfrag,
174 int *found)
175{
176 u32 t = ceph_frag_make(0, 0);
177 struct ceph_inode_frag *frag;
178 unsigned nway, i;
179 u32 n;
180
181 if (found)
182 *found = 0;
183
184 mutex_lock(&ci->i_fragtree_mutex);
185 while (1) {
186 WARN_ON(!ceph_frag_contains_value(t, v));
187 frag = __ceph_find_frag(ci, t);
188 if (!frag)
189 break; /* t is a leaf */
190 if (frag->split_by == 0) {
191 if (pfrag)
192 memcpy(pfrag, frag, sizeof(*pfrag));
193 if (found)
194 *found = 1;
195 break;
196 }
197
198 /* choose child */
199 nway = 1 << frag->split_by;
200 dout("choose_frag(%x) %x splits by %d (%d ways)\n", v, t,
201 frag->split_by, nway);
202 for (i = 0; i < nway; i++) {
203 n = ceph_frag_make_child(t, frag->split_by, i);
204 if (ceph_frag_contains_value(n, v)) {
205 t = n;
206 break;
207 }
208 }
209 BUG_ON(i == nway);
210 }
211 dout("choose_frag(%x) = %x\n", v, t);
212
213 mutex_unlock(&ci->i_fragtree_mutex);
214 return t;
215}
216
217/*
218 * Process dirfrag (delegation) info from the mds. Include leaf
219 * fragment in tree ONLY if ndist > 0. Otherwise, only
220 * branches/splits are included in i_fragtree)
221 */
222static int ceph_fill_dirfrag(struct inode *inode,
223 struct ceph_mds_reply_dirfrag *dirinfo)
224{
225 struct ceph_inode_info *ci = ceph_inode(inode);
226 struct ceph_inode_frag *frag;
227 u32 id = le32_to_cpu(dirinfo->frag);
228 int mds = le32_to_cpu(dirinfo->auth);
229 int ndist = le32_to_cpu(dirinfo->ndist);
230 int i;
231 int err = 0;
232
233 mutex_lock(&ci->i_fragtree_mutex);
234 if (ndist == 0) {
235 /* no delegation info needed. */
236 frag = __ceph_find_frag(ci, id);
237 if (!frag)
238 goto out;
239 if (frag->split_by == 0) {
240 /* tree leaf, remove */
241 dout("fill_dirfrag removed %llx.%llx frag %x"
242 " (no ref)\n", ceph_vinop(inode), id);
243 rb_erase(&frag->node, &ci->i_fragtree);
244 kfree(frag);
245 } else {
246 /* tree branch, keep and clear */
247 dout("fill_dirfrag cleared %llx.%llx frag %x"
248 " referral\n", ceph_vinop(inode), id);
249 frag->mds = -1;
250 frag->ndist = 0;
251 }
252 goto out;
253 }
254
255
256 /* find/add this frag to store mds delegation info */
257 frag = __get_or_create_frag(ci, id);
258 if (IS_ERR(frag)) {
259 /* this is not the end of the world; we can continue
260 with bad/inaccurate delegation info */
261 pr_err("fill_dirfrag ENOMEM on mds ref %llx.%llx fg %x\n",
262 ceph_vinop(inode), le32_to_cpu(dirinfo->frag));
263 err = -ENOMEM;
264 goto out;
265 }
266
267 frag->mds = mds;
268 frag->ndist = min_t(u32, ndist, CEPH_MAX_DIRFRAG_REP);
269 for (i = 0; i < frag->ndist; i++)
270 frag->dist[i] = le32_to_cpu(dirinfo->dist[i]);
271 dout("fill_dirfrag %llx.%llx frag %x ndist=%d\n",
272 ceph_vinop(inode), frag->frag, frag->ndist);
273
274out:
275 mutex_unlock(&ci->i_fragtree_mutex);
276 return err;
277}
278
279
280/*
281 * initialize a newly allocated inode.
282 */
283struct inode *ceph_alloc_inode(struct super_block *sb)
284{
285 struct ceph_inode_info *ci;
286 int i;
287
288 ci = kmem_cache_alloc(ceph_inode_cachep, GFP_NOFS);
289 if (!ci)
290 return NULL;
291
292 dout("alloc_inode %p\n", &ci->vfs_inode);
293
294 ci->i_version = 0;
295 ci->i_time_warp_seq = 0;
296 ci->i_ceph_flags = 0;
297 ci->i_release_count = 0;
298 ci->i_symlink = NULL;
299
300 ci->i_fragtree = RB_ROOT;
301 mutex_init(&ci->i_fragtree_mutex);
302
303 ci->i_xattrs.blob = NULL;
304 ci->i_xattrs.prealloc_blob = NULL;
305 ci->i_xattrs.dirty = false;
306 ci->i_xattrs.index = RB_ROOT;
307 ci->i_xattrs.count = 0;
308 ci->i_xattrs.names_size = 0;
309 ci->i_xattrs.vals_size = 0;
310 ci->i_xattrs.version = 0;
311 ci->i_xattrs.index_version = 0;
312
313 ci->i_caps = RB_ROOT;
314 ci->i_auth_cap = NULL;
315 ci->i_dirty_caps = 0;
316 ci->i_flushing_caps = 0;
317 INIT_LIST_HEAD(&ci->i_dirty_item);
318 INIT_LIST_HEAD(&ci->i_flushing_item);
319 ci->i_cap_flush_seq = 0;
320 ci->i_cap_flush_last_tid = 0;
321 memset(&ci->i_cap_flush_tid, 0, sizeof(ci->i_cap_flush_tid));
322 init_waitqueue_head(&ci->i_cap_wq);
323 ci->i_hold_caps_min = 0;
324 ci->i_hold_caps_max = 0;
325 INIT_LIST_HEAD(&ci->i_cap_delay_list);
326 ci->i_cap_exporting_mds = 0;
327 ci->i_cap_exporting_mseq = 0;
328 ci->i_cap_exporting_issued = 0;
329 INIT_LIST_HEAD(&ci->i_cap_snaps);
330 ci->i_head_snapc = NULL;
331 ci->i_snap_caps = 0;
332
333 for (i = 0; i < CEPH_FILE_MODE_NUM; i++)
334 ci->i_nr_by_mode[i] = 0;
335
336 ci->i_truncate_seq = 0;
337 ci->i_truncate_size = 0;
338 ci->i_truncate_pending = 0;
339
340 ci->i_max_size = 0;
341 ci->i_reported_size = 0;
342 ci->i_wanted_max_size = 0;
343 ci->i_requested_max_size = 0;
344
345 ci->i_pin_ref = 0;
346 ci->i_rd_ref = 0;
347 ci->i_rdcache_ref = 0;
348 ci->i_wr_ref = 0;
349 ci->i_wrbuffer_ref = 0;
350 ci->i_wrbuffer_ref_head = 0;
351 ci->i_shared_gen = 0;
352 ci->i_rdcache_gen = 0;
353 ci->i_rdcache_revoking = 0;
354
355 INIT_LIST_HEAD(&ci->i_unsafe_writes);
356 INIT_LIST_HEAD(&ci->i_unsafe_dirops);
357 spin_lock_init(&ci->i_unsafe_lock);
358
359 ci->i_snap_realm = NULL;
360 INIT_LIST_HEAD(&ci->i_snap_realm_item);
361 INIT_LIST_HEAD(&ci->i_snap_flush_item);
362
Sage Weil3c6f6b72010-02-09 15:24:44 -0800363 INIT_WORK(&ci->i_wb_work, ceph_writeback_work);
364 INIT_WORK(&ci->i_pg_inv_work, ceph_invalidate_work);
Sage Weil355da1e2009-10-06 11:31:08 -0700365
366 INIT_WORK(&ci->i_vmtruncate_work, ceph_vmtruncate_work);
367
368 return &ci->vfs_inode;
369}
370
371void ceph_destroy_inode(struct inode *inode)
372{
373 struct ceph_inode_info *ci = ceph_inode(inode);
374 struct ceph_inode_frag *frag;
375 struct rb_node *n;
376
377 dout("destroy_inode %p ino %llx.%llx\n", inode, ceph_vinop(inode));
378
379 ceph_queue_caps_release(inode);
380
Sage Weil8b218b82010-03-09 12:59:08 -0800381 /*
382 * we may still have a snap_realm reference if there are stray
383 * caps in i_cap_exporting_issued or i_snap_caps.
384 */
385 if (ci->i_snap_realm) {
386 struct ceph_mds_client *mdsc =
387 &ceph_client(ci->vfs_inode.i_sb)->mdsc;
388 struct ceph_snap_realm *realm = ci->i_snap_realm;
389
390 dout(" dropping residual ref to snap realm %p\n", realm);
391 spin_lock(&realm->inodes_with_caps_lock);
392 list_del_init(&ci->i_snap_realm_item);
393 spin_unlock(&realm->inodes_with_caps_lock);
394 ceph_put_snap_realm(mdsc, realm);
395 }
396
Sage Weil355da1e2009-10-06 11:31:08 -0700397 kfree(ci->i_symlink);
398 while ((n = rb_first(&ci->i_fragtree)) != NULL) {
399 frag = rb_entry(n, struct ceph_inode_frag, node);
400 rb_erase(n, &ci->i_fragtree);
401 kfree(frag);
402 }
403
404 __ceph_destroy_xattrs(ci);
Sage Weilb6c1d5b2009-12-07 12:17:17 -0800405 if (ci->i_xattrs.blob)
406 ceph_buffer_put(ci->i_xattrs.blob);
407 if (ci->i_xattrs.prealloc_blob)
408 ceph_buffer_put(ci->i_xattrs.prealloc_blob);
Sage Weil355da1e2009-10-06 11:31:08 -0700409
410 kmem_cache_free(ceph_inode_cachep, ci);
411}
412
413
414/*
415 * Helpers to fill in size, ctime, mtime, and atime. We have to be
416 * careful because either the client or MDS may have more up to date
417 * info, depending on which capabilities are held, and whether
418 * time_warp_seq or truncate_seq have increased. (Ordinarily, mtime
419 * and size are monotonically increasing, except when utimes() or
420 * truncate() increments the corresponding _seq values.)
421 */
422int ceph_fill_file_size(struct inode *inode, int issued,
423 u32 truncate_seq, u64 truncate_size, u64 size)
424{
425 struct ceph_inode_info *ci = ceph_inode(inode);
426 int queue_trunc = 0;
427
428 if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) > 0 ||
429 (truncate_seq == ci->i_truncate_seq && size > inode->i_size)) {
430 dout("size %lld -> %llu\n", inode->i_size, size);
431 inode->i_size = size;
432 inode->i_blocks = (size + (1<<9) - 1) >> 9;
433 ci->i_reported_size = size;
434 if (truncate_seq != ci->i_truncate_seq) {
435 dout("truncate_seq %u -> %u\n",
436 ci->i_truncate_seq, truncate_seq);
437 ci->i_truncate_seq = truncate_seq;
Yehuda Sadeh3d497d82010-02-09 11:08:40 -0800438 /*
439 * If we hold relevant caps, or in the case where we're
440 * not the only client referencing this file and we
441 * don't hold those caps, then we need to check whether
442 * the file is either opened or mmaped
443 */
444 if ((issued & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_RD|
Sage Weil355da1e2009-10-06 11:31:08 -0700445 CEPH_CAP_FILE_WR|CEPH_CAP_FILE_BUFFER|
Yehuda Sadeh3d497d82010-02-09 11:08:40 -0800446 CEPH_CAP_FILE_EXCL)) ||
447 mapping_mapped(inode->i_mapping) ||
448 __ceph_caps_file_wanted(ci)) {
Sage Weil355da1e2009-10-06 11:31:08 -0700449 ci->i_truncate_pending++;
450 queue_trunc = 1;
451 }
452 }
453 }
454 if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) >= 0 &&
455 ci->i_truncate_size != truncate_size) {
456 dout("truncate_size %lld -> %llu\n", ci->i_truncate_size,
457 truncate_size);
458 ci->i_truncate_size = truncate_size;
459 }
460 return queue_trunc;
461}
462
463void ceph_fill_file_time(struct inode *inode, int issued,
464 u64 time_warp_seq, struct timespec *ctime,
465 struct timespec *mtime, struct timespec *atime)
466{
467 struct ceph_inode_info *ci = ceph_inode(inode);
468 int warn = 0;
469
470 if (issued & (CEPH_CAP_FILE_EXCL|
471 CEPH_CAP_FILE_WR|
472 CEPH_CAP_FILE_BUFFER)) {
473 if (timespec_compare(ctime, &inode->i_ctime) > 0) {
474 dout("ctime %ld.%09ld -> %ld.%09ld inc w/ cap\n",
475 inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec,
476 ctime->tv_sec, ctime->tv_nsec);
477 inode->i_ctime = *ctime;
478 }
479 if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) > 0) {
480 /* the MDS did a utimes() */
481 dout("mtime %ld.%09ld -> %ld.%09ld "
482 "tw %d -> %d\n",
483 inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec,
484 mtime->tv_sec, mtime->tv_nsec,
485 ci->i_time_warp_seq, (int)time_warp_seq);
486
487 inode->i_mtime = *mtime;
488 inode->i_atime = *atime;
489 ci->i_time_warp_seq = time_warp_seq;
490 } else if (time_warp_seq == ci->i_time_warp_seq) {
491 /* nobody did utimes(); take the max */
492 if (timespec_compare(mtime, &inode->i_mtime) > 0) {
493 dout("mtime %ld.%09ld -> %ld.%09ld inc\n",
494 inode->i_mtime.tv_sec,
495 inode->i_mtime.tv_nsec,
496 mtime->tv_sec, mtime->tv_nsec);
497 inode->i_mtime = *mtime;
498 }
499 if (timespec_compare(atime, &inode->i_atime) > 0) {
500 dout("atime %ld.%09ld -> %ld.%09ld inc\n",
501 inode->i_atime.tv_sec,
502 inode->i_atime.tv_nsec,
503 atime->tv_sec, atime->tv_nsec);
504 inode->i_atime = *atime;
505 }
506 } else if (issued & CEPH_CAP_FILE_EXCL) {
507 /* we did a utimes(); ignore mds values */
508 } else {
509 warn = 1;
510 }
511 } else {
512 /* we have no write caps; whatever the MDS says is true */
513 if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) >= 0) {
514 inode->i_ctime = *ctime;
515 inode->i_mtime = *mtime;
516 inode->i_atime = *atime;
517 ci->i_time_warp_seq = time_warp_seq;
518 } else {
519 warn = 1;
520 }
521 }
522 if (warn) /* time_warp_seq shouldn't go backwards */
523 dout("%p mds time_warp_seq %llu < %u\n",
524 inode, time_warp_seq, ci->i_time_warp_seq);
525}
526
527/*
528 * Populate an inode based on info from mds. May be called on new or
529 * existing inodes.
530 */
531static int fill_inode(struct inode *inode,
532 struct ceph_mds_reply_info_in *iinfo,
533 struct ceph_mds_reply_dirfrag *dirinfo,
534 struct ceph_mds_session *session,
535 unsigned long ttl_from, int cap_fmode,
536 struct ceph_cap_reservation *caps_reservation)
537{
538 struct ceph_mds_reply_inode *info = iinfo->in;
539 struct ceph_inode_info *ci = ceph_inode(inode);
540 int i;
541 int issued, implemented;
542 struct timespec mtime, atime, ctime;
543 u32 nsplits;
544 struct ceph_buffer *xattr_blob = NULL;
545 int err = 0;
546 int queue_trunc = 0;
547
548 dout("fill_inode %p ino %llx.%llx v %llu had %llu\n",
549 inode, ceph_vinop(inode), le64_to_cpu(info->version),
550 ci->i_version);
551
552 /*
553 * prealloc xattr data, if it looks like we'll need it. only
554 * if len > 4 (meaning there are actually xattrs; the first 4
555 * bytes are the xattr count).
556 */
557 if (iinfo->xattr_len > 4) {
Sage Weilb6c1d5b2009-12-07 12:17:17 -0800558 xattr_blob = ceph_buffer_new(iinfo->xattr_len, GFP_NOFS);
Sage Weil355da1e2009-10-06 11:31:08 -0700559 if (!xattr_blob)
560 pr_err("fill_inode ENOMEM xattr blob %d bytes\n",
561 iinfo->xattr_len);
562 }
563
564 spin_lock(&inode->i_lock);
565
566 /*
567 * provided version will be odd if inode value is projected,
568 * even if stable. skip the update if we have a newer info
569 * (e.g., due to inode info racing form multiple MDSs), or if
570 * we are getting projected (unstable) inode info.
571 */
572 if (le64_to_cpu(info->version) > 0 &&
573 (ci->i_version & ~1) > le64_to_cpu(info->version))
574 goto no_change;
575
576 issued = __ceph_caps_issued(ci, &implemented);
577 issued |= implemented | __ceph_caps_dirty(ci);
578
579 /* update inode */
580 ci->i_version = le64_to_cpu(info->version);
581 inode->i_version++;
582 inode->i_rdev = le32_to_cpu(info->rdev);
583
584 if ((issued & CEPH_CAP_AUTH_EXCL) == 0) {
585 inode->i_mode = le32_to_cpu(info->mode);
586 inode->i_uid = le32_to_cpu(info->uid);
587 inode->i_gid = le32_to_cpu(info->gid);
588 dout("%p mode 0%o uid.gid %d.%d\n", inode, inode->i_mode,
589 inode->i_uid, inode->i_gid);
590 }
591
592 if ((issued & CEPH_CAP_LINK_EXCL) == 0)
593 inode->i_nlink = le32_to_cpu(info->nlink);
594
595 /* be careful with mtime, atime, size */
596 ceph_decode_timespec(&atime, &info->atime);
597 ceph_decode_timespec(&mtime, &info->mtime);
598 ceph_decode_timespec(&ctime, &info->ctime);
599 queue_trunc = ceph_fill_file_size(inode, issued,
600 le32_to_cpu(info->truncate_seq),
601 le64_to_cpu(info->truncate_size),
Sage Weil355da1e2009-10-06 11:31:08 -0700602 le64_to_cpu(info->size));
603 ceph_fill_file_time(inode, issued,
604 le32_to_cpu(info->time_warp_seq),
605 &ctime, &mtime, &atime);
606
607 ci->i_max_size = le64_to_cpu(info->max_size);
608 ci->i_layout = info->layout;
609 inode->i_blkbits = fls(le32_to_cpu(info->layout.fl_stripe_unit)) - 1;
610
611 /* xattrs */
612 /* note that if i_xattrs.len <= 4, i_xattrs.data will still be NULL. */
613 if ((issued & CEPH_CAP_XATTR_EXCL) == 0 &&
614 le64_to_cpu(info->xattr_version) > ci->i_xattrs.version) {
615 if (ci->i_xattrs.blob)
616 ceph_buffer_put(ci->i_xattrs.blob);
617 ci->i_xattrs.blob = xattr_blob;
618 if (xattr_blob)
619 memcpy(ci->i_xattrs.blob->vec.iov_base,
620 iinfo->xattr_data, iinfo->xattr_len);
621 ci->i_xattrs.version = le64_to_cpu(info->xattr_version);
622 }
623
624 inode->i_mapping->a_ops = &ceph_aops;
625 inode->i_mapping->backing_dev_info =
626 &ceph_client(inode->i_sb)->backing_dev_info;
627
628 switch (inode->i_mode & S_IFMT) {
629 case S_IFIFO:
630 case S_IFBLK:
631 case S_IFCHR:
632 case S_IFSOCK:
633 init_special_inode(inode, inode->i_mode, inode->i_rdev);
634 inode->i_op = &ceph_file_iops;
635 break;
636 case S_IFREG:
637 inode->i_op = &ceph_file_iops;
638 inode->i_fop = &ceph_file_fops;
639 break;
640 case S_IFLNK:
641 inode->i_op = &ceph_symlink_iops;
642 if (!ci->i_symlink) {
643 int symlen = iinfo->symlink_len;
644 char *sym;
645
646 BUG_ON(symlen != inode->i_size);
647 spin_unlock(&inode->i_lock);
648
649 err = -ENOMEM;
650 sym = kmalloc(symlen+1, GFP_NOFS);
651 if (!sym)
652 goto out;
653 memcpy(sym, iinfo->symlink, symlen);
654 sym[symlen] = 0;
655
656 spin_lock(&inode->i_lock);
657 if (!ci->i_symlink)
658 ci->i_symlink = sym;
659 else
660 kfree(sym); /* lost a race */
661 }
662 break;
663 case S_IFDIR:
664 inode->i_op = &ceph_dir_iops;
665 inode->i_fop = &ceph_dir_fops;
666
667 ci->i_files = le64_to_cpu(info->files);
668 ci->i_subdirs = le64_to_cpu(info->subdirs);
669 ci->i_rbytes = le64_to_cpu(info->rbytes);
670 ci->i_rfiles = le64_to_cpu(info->rfiles);
671 ci->i_rsubdirs = le64_to_cpu(info->rsubdirs);
672 ceph_decode_timespec(&ci->i_rctime, &info->rctime);
673
674 /* set dir completion flag? */
675 if (ci->i_files == 0 && ci->i_subdirs == 0 &&
676 ceph_snap(inode) == CEPH_NOSNAP &&
677 (le32_to_cpu(info->cap.caps) & CEPH_CAP_FILE_SHARED)) {
678 dout(" marking %p complete (empty)\n", inode);
679 ci->i_ceph_flags |= CEPH_I_COMPLETE;
680 ci->i_max_offset = 2;
681 }
682
683 /* it may be better to set st_size in getattr instead? */
684 if (ceph_test_opt(ceph_client(inode->i_sb), RBYTES))
685 inode->i_size = ci->i_rbytes;
686 break;
687 default:
688 pr_err("fill_inode %llx.%llx BAD mode 0%o\n",
689 ceph_vinop(inode), inode->i_mode);
690 }
691
692no_change:
693 spin_unlock(&inode->i_lock);
694
695 /* queue truncate if we saw i_size decrease */
696 if (queue_trunc)
Sage Weil3c6f6b72010-02-09 15:24:44 -0800697 ceph_queue_vmtruncate(inode);
Sage Weil355da1e2009-10-06 11:31:08 -0700698
699 /* populate frag tree */
700 /* FIXME: move me up, if/when version reflects fragtree changes */
701 nsplits = le32_to_cpu(info->fragtree.nsplits);
702 mutex_lock(&ci->i_fragtree_mutex);
703 for (i = 0; i < nsplits; i++) {
704 u32 id = le32_to_cpu(info->fragtree.splits[i].frag);
705 struct ceph_inode_frag *frag = __get_or_create_frag(ci, id);
706
707 if (IS_ERR(frag))
708 continue;
709 frag->split_by = le32_to_cpu(info->fragtree.splits[i].by);
710 dout(" frag %x split by %d\n", frag->frag, frag->split_by);
711 }
712 mutex_unlock(&ci->i_fragtree_mutex);
713
714 /* were we issued a capability? */
715 if (info->cap.caps) {
716 if (ceph_snap(inode) == CEPH_NOSNAP) {
717 ceph_add_cap(inode, session,
718 le64_to_cpu(info->cap.cap_id),
719 cap_fmode,
720 le32_to_cpu(info->cap.caps),
721 le32_to_cpu(info->cap.wanted),
722 le32_to_cpu(info->cap.seq),
723 le32_to_cpu(info->cap.mseq),
724 le64_to_cpu(info->cap.realm),
725 info->cap.flags,
726 caps_reservation);
727 } else {
728 spin_lock(&inode->i_lock);
729 dout(" %p got snap_caps %s\n", inode,
730 ceph_cap_string(le32_to_cpu(info->cap.caps)));
731 ci->i_snap_caps |= le32_to_cpu(info->cap.caps);
732 if (cap_fmode >= 0)
733 __ceph_get_fmode(ci, cap_fmode);
734 spin_unlock(&inode->i_lock);
735 }
Sage Weil04d000e2010-05-07 11:26:34 -0700736 } else if (cap_fmode >= 0) {
737 pr_warning("mds issued no caps on %llx.%llx\n",
738 ceph_vinop(inode));
739 __ceph_get_fmode(ci, cap_fmode);
Sage Weil355da1e2009-10-06 11:31:08 -0700740 }
741
742 /* update delegation info? */
743 if (dirinfo)
744 ceph_fill_dirfrag(inode, dirinfo);
745
746 err = 0;
747
748out:
Sage Weilb6c1d5b2009-12-07 12:17:17 -0800749 if (xattr_blob)
750 ceph_buffer_put(xattr_blob);
Sage Weil355da1e2009-10-06 11:31:08 -0700751 return err;
752}
753
754/*
755 * caller should hold session s_mutex.
756 */
757static void update_dentry_lease(struct dentry *dentry,
758 struct ceph_mds_reply_lease *lease,
759 struct ceph_mds_session *session,
760 unsigned long from_time)
761{
762 struct ceph_dentry_info *di = ceph_dentry(dentry);
763 long unsigned duration = le32_to_cpu(lease->duration_ms);
764 long unsigned ttl = from_time + (duration * HZ) / 1000;
765 long unsigned half_ttl = from_time + (duration * HZ / 2) / 1000;
766 struct inode *dir;
767
768 /* only track leases on regular dentries */
769 if (dentry->d_op != &ceph_dentry_ops)
770 return;
771
772 spin_lock(&dentry->d_lock);
773 dout("update_dentry_lease %p mask %d duration %lu ms ttl %lu\n",
774 dentry, le16_to_cpu(lease->mask), duration, ttl);
775
776 /* make lease_rdcache_gen match directory */
777 dir = dentry->d_parent->d_inode;
778 di->lease_shared_gen = ceph_inode(dir)->i_shared_gen;
779
780 if (lease->mask == 0)
781 goto out_unlock;
782
783 if (di->lease_gen == session->s_cap_gen &&
784 time_before(ttl, dentry->d_time))
785 goto out_unlock; /* we already have a newer lease. */
786
787 if (di->lease_session && di->lease_session != session)
788 goto out_unlock;
789
790 ceph_dentry_lru_touch(dentry);
791
792 if (!di->lease_session)
793 di->lease_session = ceph_get_mds_session(session);
794 di->lease_gen = session->s_cap_gen;
795 di->lease_seq = le32_to_cpu(lease->seq);
796 di->lease_renew_after = half_ttl;
797 di->lease_renew_from = 0;
798 dentry->d_time = ttl;
799out_unlock:
800 spin_unlock(&dentry->d_lock);
801 return;
802}
803
804/*
805 * splice a dentry to an inode.
806 * caller must hold directory i_mutex for this to be safe.
807 *
808 * we will only rehash the resulting dentry if @prehash is
809 * true; @prehash will be set to false (for the benefit of
810 * the caller) if we fail.
811 */
812static struct dentry *splice_dentry(struct dentry *dn, struct inode *in,
813 bool *prehash)
814{
815 struct dentry *realdn;
816
817 /* dn must be unhashed */
818 if (!d_unhashed(dn))
819 d_drop(dn);
820 realdn = d_materialise_unique(dn, in);
821 if (IS_ERR(realdn)) {
822 pr_err("splice_dentry error %p inode %p ino %llx.%llx\n",
823 dn, in, ceph_vinop(in));
824 if (prehash)
825 *prehash = false; /* don't rehash on error */
826 dn = realdn; /* note realdn contains the error */
827 goto out;
828 } else if (realdn) {
829 dout("dn %p (%d) spliced with %p (%d) "
830 "inode %p ino %llx.%llx\n",
831 dn, atomic_read(&dn->d_count),
832 realdn, atomic_read(&realdn->d_count),
833 realdn->d_inode, ceph_vinop(realdn->d_inode));
834 dput(dn);
835 dn = realdn;
836 } else {
837 BUG_ON(!ceph_dentry(dn));
838
839 dout("dn %p attached to %p ino %llx.%llx\n",
840 dn, dn->d_inode, ceph_vinop(dn->d_inode));
841 }
842 if ((!prehash || *prehash) && d_unhashed(dn))
843 d_rehash(dn);
844out:
845 return dn;
846}
847
848/*
Yehuda Sadeh4baa75e2010-01-07 15:36:32 -0800849 * Set dentry's directory position based on the current dir's max, and
850 * order it in d_subdirs, so that dcache_readdir behaves.
851 */
852static void ceph_set_dentry_offset(struct dentry *dn)
853{
854 struct dentry *dir = dn->d_parent;
855 struct inode *inode = dn->d_parent->d_inode;
856 struct ceph_dentry_info *di;
857
858 BUG_ON(!inode);
859
860 di = ceph_dentry(dn);
861
862 spin_lock(&inode->i_lock);
863 di->offset = ceph_inode(inode)->i_max_offset++;
864 spin_unlock(&inode->i_lock);
865
866 spin_lock(&dcache_lock);
867 spin_lock(&dn->d_lock);
868 list_move_tail(&dir->d_subdirs, &dn->d_u.d_child);
869 dout("set_dentry_offset %p %lld (%p %p)\n", dn, di->offset,
870 dn->d_u.d_child.prev, dn->d_u.d_child.next);
871 spin_unlock(&dn->d_lock);
872 spin_unlock(&dcache_lock);
873}
874
875/*
Sage Weil355da1e2009-10-06 11:31:08 -0700876 * Incorporate results into the local cache. This is either just
877 * one inode, or a directory, dentry, and possibly linked-to inode (e.g.,
878 * after a lookup).
879 *
880 * A reply may contain
881 * a directory inode along with a dentry.
882 * and/or a target inode
883 *
884 * Called with snap_rwsem (read).
885 */
886int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req,
887 struct ceph_mds_session *session)
888{
889 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
890 struct inode *in = NULL;
891 struct ceph_mds_reply_inode *ininfo;
892 struct ceph_vino vino;
Sage Weil9358c6d2010-03-30 13:54:41 -0700893 struct ceph_client *client = ceph_sb_to_client(sb);
Sage Weil355da1e2009-10-06 11:31:08 -0700894 int i = 0;
895 int err = 0;
896
897 dout("fill_trace %p is_dentry %d is_target %d\n", req,
898 rinfo->head->is_dentry, rinfo->head->is_target);
899
900#if 0
901 /*
902 * Debugging hook:
903 *
904 * If we resend completed ops to a recovering mds, we get no
905 * trace. Since that is very rare, pretend this is the case
906 * to ensure the 'no trace' handlers in the callers behave.
907 *
908 * Fill in inodes unconditionally to avoid breaking cap
909 * invariants.
910 */
911 if (rinfo->head->op & CEPH_MDS_OP_WRITE) {
912 pr_info("fill_trace faking empty trace on %lld %s\n",
913 req->r_tid, ceph_mds_op_name(rinfo->head->op));
914 if (rinfo->head->is_dentry) {
915 rinfo->head->is_dentry = 0;
916 err = fill_inode(req->r_locked_dir,
917 &rinfo->diri, rinfo->dirfrag,
918 session, req->r_request_started, -1);
919 }
920 if (rinfo->head->is_target) {
921 rinfo->head->is_target = 0;
922 ininfo = rinfo->targeti.in;
923 vino.ino = le64_to_cpu(ininfo->ino);
924 vino.snap = le64_to_cpu(ininfo->snapid);
925 in = ceph_get_inode(sb, vino);
926 err = fill_inode(in, &rinfo->targeti, NULL,
927 session, req->r_request_started,
928 req->r_fmode);
929 iput(in);
930 }
931 }
932#endif
933
934 if (!rinfo->head->is_target && !rinfo->head->is_dentry) {
935 dout("fill_trace reply is empty!\n");
936 if (rinfo->head->result == 0 && req->r_locked_dir) {
937 struct ceph_inode_info *ci =
938 ceph_inode(req->r_locked_dir);
939 dout(" clearing %p complete (empty trace)\n",
940 req->r_locked_dir);
941 ci->i_ceph_flags &= ~CEPH_I_COMPLETE;
942 ci->i_release_count++;
943 }
944 return 0;
945 }
946
947 if (rinfo->head->is_dentry) {
Sage Weil5b1daec2010-01-25 11:33:08 -0800948 struct inode *dir = req->r_locked_dir;
949
950 err = fill_inode(dir, &rinfo->diri, rinfo->dirfrag,
951 session, req->r_request_started, -1,
952 &req->r_caps_reservation);
953 if (err < 0)
954 return err;
955 }
956
Sage Weil9358c6d2010-03-30 13:54:41 -0700957 /*
958 * ignore null lease/binding on snapdir ENOENT, or else we
959 * will have trouble splicing in the virtual snapdir later
960 */
961 if (rinfo->head->is_dentry && !req->r_aborted &&
962 (rinfo->head->is_target || strncmp(req->r_dentry->d_name.name,
963 client->mount_args->snapdir_name,
964 req->r_dentry->d_name.len))) {
Sage Weil355da1e2009-10-06 11:31:08 -0700965 /*
966 * lookup link rename : null -> possibly existing inode
967 * mknod symlink mkdir : null -> new inode
968 * unlink : linked -> null
969 */
970 struct inode *dir = req->r_locked_dir;
971 struct dentry *dn = req->r_dentry;
972 bool have_dir_cap, have_lease;
973
974 BUG_ON(!dn);
975 BUG_ON(!dir);
976 BUG_ON(dn->d_parent->d_inode != dir);
977 BUG_ON(ceph_ino(dir) !=
978 le64_to_cpu(rinfo->diri.in->ino));
979 BUG_ON(ceph_snap(dir) !=
980 le64_to_cpu(rinfo->diri.in->snapid));
981
Sage Weil355da1e2009-10-06 11:31:08 -0700982 /* do we have a lease on the whole dir? */
983 have_dir_cap =
984 (le32_to_cpu(rinfo->diri.in->cap.caps) &
985 CEPH_CAP_FILE_SHARED);
986
987 /* do we have a dn lease? */
988 have_lease = have_dir_cap ||
989 (le16_to_cpu(rinfo->dlease->mask) &
990 CEPH_LOCK_DN);
991
992 if (!have_lease)
993 dout("fill_trace no dentry lease or dir cap\n");
994
995 /* rename? */
996 if (req->r_old_dentry && req->r_op == CEPH_MDS_OP_RENAME) {
997 dout(" src %p '%.*s' dst %p '%.*s'\n",
998 req->r_old_dentry,
999 req->r_old_dentry->d_name.len,
1000 req->r_old_dentry->d_name.name,
1001 dn, dn->d_name.len, dn->d_name.name);
1002 dout("fill_trace doing d_move %p -> %p\n",
1003 req->r_old_dentry, dn);
Sage Weilc10f5e12010-04-16 12:56:11 -07001004
1005 /* d_move screws up d_subdirs order */
1006 ceph_i_clear(dir, CEPH_I_COMPLETE);
1007
Sage Weil355da1e2009-10-06 11:31:08 -07001008 d_move(req->r_old_dentry, dn);
1009 dout(" src %p '%.*s' dst %p '%.*s'\n",
1010 req->r_old_dentry,
1011 req->r_old_dentry->d_name.len,
1012 req->r_old_dentry->d_name.name,
1013 dn, dn->d_name.len, dn->d_name.name);
Sage Weilc4a29f22009-12-21 11:42:18 -08001014 /* ensure target dentry is invalidated, despite
1015 rehashing bug in vfs_rename_dir */
1016 dn->d_time = jiffies;
1017 ceph_dentry(dn)->lease_shared_gen = 0;
Sage Weil355da1e2009-10-06 11:31:08 -07001018 /* take overwritten dentry's readdir offset */
1019 ceph_dentry(req->r_old_dentry)->offset =
1020 ceph_dentry(dn)->offset;
1021 dn = req->r_old_dentry; /* use old_dentry */
1022 in = dn->d_inode;
1023 }
1024
1025 /* null dentry? */
1026 if (!rinfo->head->is_target) {
1027 dout("fill_trace null dentry\n");
1028 if (dn->d_inode) {
1029 dout("d_delete %p\n", dn);
1030 d_delete(dn);
1031 } else {
1032 dout("d_instantiate %p NULL\n", dn);
1033 d_instantiate(dn, NULL);
1034 if (have_lease && d_unhashed(dn))
1035 d_rehash(dn);
1036 update_dentry_lease(dn, rinfo->dlease,
1037 session,
1038 req->r_request_started);
1039 }
1040 goto done;
1041 }
1042
1043 /* attach proper inode */
1044 ininfo = rinfo->targeti.in;
1045 vino.ino = le64_to_cpu(ininfo->ino);
1046 vino.snap = le64_to_cpu(ininfo->snapid);
1047 if (!dn->d_inode) {
1048 in = ceph_get_inode(sb, vino);
1049 if (IS_ERR(in)) {
1050 pr_err("fill_trace bad get_inode "
1051 "%llx.%llx\n", vino.ino, vino.snap);
1052 err = PTR_ERR(in);
1053 d_delete(dn);
1054 goto done;
1055 }
1056 dn = splice_dentry(dn, in, &have_lease);
1057 if (IS_ERR(dn)) {
1058 err = PTR_ERR(dn);
1059 goto done;
1060 }
1061 req->r_dentry = dn; /* may have spliced */
Yehuda Sadeh4baa75e2010-01-07 15:36:32 -08001062 ceph_set_dentry_offset(dn);
Sage Weil355da1e2009-10-06 11:31:08 -07001063 igrab(in);
1064 } else if (ceph_ino(in) == vino.ino &&
1065 ceph_snap(in) == vino.snap) {
1066 igrab(in);
1067 } else {
1068 dout(" %p links to %p %llx.%llx, not %llx.%llx\n",
1069 dn, in, ceph_ino(in), ceph_snap(in),
1070 vino.ino, vino.snap);
1071 have_lease = false;
1072 in = NULL;
1073 }
1074
1075 if (have_lease)
1076 update_dentry_lease(dn, rinfo->dlease, session,
1077 req->r_request_started);
1078 dout(" final dn %p\n", dn);
1079 i++;
1080 } else if (req->r_op == CEPH_MDS_OP_LOOKUPSNAP ||
1081 req->r_op == CEPH_MDS_OP_MKSNAP) {
1082 struct dentry *dn = req->r_dentry;
1083
1084 /* fill out a snapdir LOOKUPSNAP dentry */
1085 BUG_ON(!dn);
1086 BUG_ON(!req->r_locked_dir);
1087 BUG_ON(ceph_snap(req->r_locked_dir) != CEPH_SNAPDIR);
1088 ininfo = rinfo->targeti.in;
1089 vino.ino = le64_to_cpu(ininfo->ino);
1090 vino.snap = le64_to_cpu(ininfo->snapid);
1091 in = ceph_get_inode(sb, vino);
1092 if (IS_ERR(in)) {
1093 pr_err("fill_inode get_inode badness %llx.%llx\n",
1094 vino.ino, vino.snap);
1095 err = PTR_ERR(in);
1096 d_delete(dn);
1097 goto done;
1098 }
1099 dout(" linking snapped dir %p to dn %p\n", in, dn);
1100 dn = splice_dentry(dn, in, NULL);
1101 if (IS_ERR(dn)) {
1102 err = PTR_ERR(dn);
1103 goto done;
1104 }
Yehuda Sadeh4baa75e2010-01-07 15:36:32 -08001105 ceph_set_dentry_offset(dn);
Sage Weil355da1e2009-10-06 11:31:08 -07001106 req->r_dentry = dn; /* may have spliced */
1107 igrab(in);
1108 rinfo->head->is_dentry = 1; /* fool notrace handlers */
1109 }
1110
1111 if (rinfo->head->is_target) {
1112 vino.ino = le64_to_cpu(rinfo->targeti.in->ino);
1113 vino.snap = le64_to_cpu(rinfo->targeti.in->snapid);
1114
1115 if (in == NULL || ceph_ino(in) != vino.ino ||
1116 ceph_snap(in) != vino.snap) {
1117 in = ceph_get_inode(sb, vino);
1118 if (IS_ERR(in)) {
1119 err = PTR_ERR(in);
1120 goto done;
1121 }
1122 }
1123 req->r_target_inode = in;
1124
1125 err = fill_inode(in,
1126 &rinfo->targeti, NULL,
1127 session, req->r_request_started,
1128 (le32_to_cpu(rinfo->head->result) == 0) ?
1129 req->r_fmode : -1,
1130 &req->r_caps_reservation);
1131 if (err < 0) {
1132 pr_err("fill_inode badness %p %llx.%llx\n",
1133 in, ceph_vinop(in));
1134 goto done;
1135 }
1136 }
1137
1138done:
1139 dout("fill_trace done err=%d\n", err);
1140 return err;
1141}
1142
1143/*
1144 * Prepopulate our cache with readdir results, leases, etc.
1145 */
1146int ceph_readdir_prepopulate(struct ceph_mds_request *req,
1147 struct ceph_mds_session *session)
1148{
1149 struct dentry *parent = req->r_dentry;
1150 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
1151 struct qstr dname;
1152 struct dentry *dn;
1153 struct inode *in;
1154 int err = 0, i;
1155 struct inode *snapdir = NULL;
1156 struct ceph_mds_request_head *rhead = req->r_request->front.iov_base;
1157 u64 frag = le32_to_cpu(rhead->args.readdir.frag);
1158 struct ceph_dentry_info *di;
1159
1160 if (le32_to_cpu(rinfo->head->op) == CEPH_MDS_OP_LSSNAP) {
1161 snapdir = ceph_get_snapdir(parent->d_inode);
1162 parent = d_find_alias(snapdir);
1163 dout("readdir_prepopulate %d items under SNAPDIR dn %p\n",
1164 rinfo->dir_nr, parent);
1165 } else {
1166 dout("readdir_prepopulate %d items under dn %p\n",
1167 rinfo->dir_nr, parent);
1168 if (rinfo->dir_dir)
1169 ceph_fill_dirfrag(parent->d_inode, rinfo->dir_dir);
1170 }
1171
1172 for (i = 0; i < rinfo->dir_nr; i++) {
1173 struct ceph_vino vino;
1174
1175 dname.name = rinfo->dir_dname[i];
1176 dname.len = rinfo->dir_dname_len[i];
1177 dname.hash = full_name_hash(dname.name, dname.len);
1178
1179 vino.ino = le64_to_cpu(rinfo->dir_in[i].in->ino);
1180 vino.snap = le64_to_cpu(rinfo->dir_in[i].in->snapid);
1181
1182retry_lookup:
1183 dn = d_lookup(parent, &dname);
1184 dout("d_lookup on parent=%p name=%.*s got %p\n",
1185 parent, dname.len, dname.name, dn);
1186
1187 if (!dn) {
1188 dn = d_alloc(parent, &dname);
1189 dout("d_alloc %p '%.*s' = %p\n", parent,
1190 dname.len, dname.name, dn);
1191 if (dn == NULL) {
1192 dout("d_alloc badness\n");
1193 err = -ENOMEM;
1194 goto out;
1195 }
1196 err = ceph_init_dentry(dn);
1197 if (err < 0)
1198 goto out;
1199 } else if (dn->d_inode &&
1200 (ceph_ino(dn->d_inode) != vino.ino ||
1201 ceph_snap(dn->d_inode) != vino.snap)) {
1202 dout(" dn %p points to wrong inode %p\n",
1203 dn, dn->d_inode);
1204 d_delete(dn);
1205 dput(dn);
1206 goto retry_lookup;
1207 } else {
1208 /* reorder parent's d_subdirs */
1209 spin_lock(&dcache_lock);
1210 spin_lock(&dn->d_lock);
1211 list_move(&dn->d_u.d_child, &parent->d_subdirs);
1212 spin_unlock(&dn->d_lock);
1213 spin_unlock(&dcache_lock);
1214 }
1215
1216 di = dn->d_fsdata;
1217 di->offset = ceph_make_fpos(frag, i + req->r_readdir_offset);
1218
1219 /* inode */
1220 if (dn->d_inode) {
1221 in = dn->d_inode;
1222 } else {
1223 in = ceph_get_inode(parent->d_sb, vino);
1224 if (in == NULL) {
1225 dout("new_inode badness\n");
1226 d_delete(dn);
1227 dput(dn);
1228 err = -ENOMEM;
1229 goto out;
1230 }
1231 dn = splice_dentry(dn, in, NULL);
1232 }
1233
1234 if (fill_inode(in, &rinfo->dir_in[i], NULL, session,
1235 req->r_request_started, -1,
1236 &req->r_caps_reservation) < 0) {
1237 pr_err("fill_inode badness on %p\n", in);
1238 dput(dn);
1239 continue;
1240 }
1241 update_dentry_lease(dn, rinfo->dir_dlease[i],
1242 req->r_session, req->r_request_started);
1243 dput(dn);
1244 }
1245 req->r_did_prepopulate = true;
1246
1247out:
1248 if (snapdir) {
1249 iput(snapdir);
1250 dput(parent);
1251 }
1252 dout("readdir_prepopulate done\n");
1253 return err;
1254}
1255
1256int ceph_inode_set_size(struct inode *inode, loff_t size)
1257{
1258 struct ceph_inode_info *ci = ceph_inode(inode);
1259 int ret = 0;
1260
1261 spin_lock(&inode->i_lock);
1262 dout("set_size %p %llu -> %llu\n", inode, inode->i_size, size);
1263 inode->i_size = size;
1264 inode->i_blocks = (size + (1 << 9) - 1) >> 9;
1265
1266 /* tell the MDS if we are approaching max_size */
1267 if ((size << 1) >= ci->i_max_size &&
1268 (ci->i_reported_size << 1) < ci->i_max_size)
1269 ret = 1;
1270
1271 spin_unlock(&inode->i_lock);
1272 return ret;
1273}
1274
1275/*
1276 * Write back inode data in a worker thread. (This can't be done
1277 * in the message handler context.)
1278 */
Sage Weil3c6f6b72010-02-09 15:24:44 -08001279void ceph_queue_writeback(struct inode *inode)
1280{
1281 if (queue_work(ceph_inode_to_client(inode)->wb_wq,
1282 &ceph_inode(inode)->i_wb_work)) {
Sage Weil2c27c9a2010-02-17 15:45:51 -08001283 dout("ceph_queue_writeback %p\n", inode);
Sage Weil3c6f6b72010-02-09 15:24:44 -08001284 igrab(inode);
1285 } else {
Sage Weil2c27c9a2010-02-17 15:45:51 -08001286 dout("ceph_queue_writeback %p failed\n", inode);
Sage Weil3c6f6b72010-02-09 15:24:44 -08001287 }
1288}
1289
1290static void ceph_writeback_work(struct work_struct *work)
Sage Weil355da1e2009-10-06 11:31:08 -07001291{
1292 struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info,
1293 i_wb_work);
1294 struct inode *inode = &ci->vfs_inode;
1295
1296 dout("writeback %p\n", inode);
1297 filemap_fdatawrite(&inode->i_data);
1298 iput(inode);
1299}
1300
1301/*
Sage Weil3c6f6b72010-02-09 15:24:44 -08001302 * queue an async invalidation
1303 */
1304void ceph_queue_invalidate(struct inode *inode)
1305{
1306 if (queue_work(ceph_inode_to_client(inode)->pg_inv_wq,
1307 &ceph_inode(inode)->i_pg_inv_work)) {
1308 dout("ceph_queue_invalidate %p\n", inode);
1309 igrab(inode);
1310 } else {
1311 dout("ceph_queue_invalidate %p failed\n", inode);
1312 }
1313}
1314
1315/*
Yehuda Sadehc9af9fb2010-02-19 00:10:11 +00001316 * invalidate any pages that are not dirty or under writeback. this
1317 * includes pages that are clean and mapped.
1318 */
1319static void ceph_invalidate_nondirty_pages(struct address_space *mapping)
1320{
1321 struct pagevec pvec;
1322 pgoff_t next = 0;
1323 int i;
1324
1325 pagevec_init(&pvec, 0);
1326 while (pagevec_lookup(&pvec, mapping, next, PAGEVEC_SIZE)) {
1327 for (i = 0; i < pagevec_count(&pvec); i++) {
1328 struct page *page = pvec.pages[i];
1329 pgoff_t index;
1330 int skip_page =
1331 (PageDirty(page) || PageWriteback(page));
1332
1333 if (!skip_page)
1334 skip_page = !trylock_page(page);
1335
1336 /*
1337 * We really shouldn't be looking at the ->index of an
1338 * unlocked page. But we're not allowed to lock these
1339 * pages. So we rely upon nobody altering the ->index
1340 * of this (pinned-by-us) page.
1341 */
1342 index = page->index;
1343 if (index > next)
1344 next = index;
1345 next++;
1346
1347 if (skip_page)
1348 continue;
1349
1350 generic_error_remove_page(mapping, page);
1351 unlock_page(page);
1352 }
1353 pagevec_release(&pvec);
1354 cond_resched();
1355 }
1356}
1357
1358/*
Sage Weil355da1e2009-10-06 11:31:08 -07001359 * Invalidate inode pages in a worker thread. (This can't be done
1360 * in the message handler context.)
1361 */
Sage Weil3c6f6b72010-02-09 15:24:44 -08001362static void ceph_invalidate_work(struct work_struct *work)
Sage Weil355da1e2009-10-06 11:31:08 -07001363{
1364 struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info,
1365 i_pg_inv_work);
1366 struct inode *inode = &ci->vfs_inode;
1367 u32 orig_gen;
1368 int check = 0;
1369
1370 spin_lock(&inode->i_lock);
1371 dout("invalidate_pages %p gen %d revoking %d\n", inode,
1372 ci->i_rdcache_gen, ci->i_rdcache_revoking);
1373 if (ci->i_rdcache_gen == 0 ||
1374 ci->i_rdcache_revoking != ci->i_rdcache_gen) {
1375 BUG_ON(ci->i_rdcache_revoking > ci->i_rdcache_gen);
1376 /* nevermind! */
1377 ci->i_rdcache_revoking = 0;
1378 spin_unlock(&inode->i_lock);
1379 goto out;
1380 }
1381 orig_gen = ci->i_rdcache_gen;
1382 spin_unlock(&inode->i_lock);
1383
Yehuda Sadehc9af9fb2010-02-19 00:10:11 +00001384 ceph_invalidate_nondirty_pages(inode->i_mapping);
Sage Weil355da1e2009-10-06 11:31:08 -07001385
1386 spin_lock(&inode->i_lock);
1387 if (orig_gen == ci->i_rdcache_gen) {
1388 dout("invalidate_pages %p gen %d successful\n", inode,
1389 ci->i_rdcache_gen);
1390 ci->i_rdcache_gen = 0;
1391 ci->i_rdcache_revoking = 0;
1392 check = 1;
1393 } else {
1394 dout("invalidate_pages %p gen %d raced, gen now %d\n",
1395 inode, orig_gen, ci->i_rdcache_gen);
1396 }
1397 spin_unlock(&inode->i_lock);
1398
1399 if (check)
1400 ceph_check_caps(ci, 0, NULL);
1401out:
1402 iput(inode);
1403}
1404
1405
1406/*
1407 * called by trunc_wq; take i_mutex ourselves
1408 *
1409 * We also truncate in a separate thread as well.
1410 */
Sage Weil3c6f6b72010-02-09 15:24:44 -08001411static void ceph_vmtruncate_work(struct work_struct *work)
Sage Weil355da1e2009-10-06 11:31:08 -07001412{
1413 struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info,
1414 i_vmtruncate_work);
1415 struct inode *inode = &ci->vfs_inode;
1416
1417 dout("vmtruncate_work %p\n", inode);
1418 mutex_lock(&inode->i_mutex);
1419 __ceph_do_pending_vmtruncate(inode);
1420 mutex_unlock(&inode->i_mutex);
1421 iput(inode);
1422}
1423
1424/*
Sage Weil3c6f6b72010-02-09 15:24:44 -08001425 * Queue an async vmtruncate. If we fail to queue work, we will handle
1426 * the truncation the next time we call __ceph_do_pending_vmtruncate.
1427 */
1428void ceph_queue_vmtruncate(struct inode *inode)
1429{
1430 struct ceph_inode_info *ci = ceph_inode(inode);
1431
1432 if (queue_work(ceph_client(inode->i_sb)->trunc_wq,
1433 &ci->i_vmtruncate_work)) {
1434 dout("ceph_queue_vmtruncate %p\n", inode);
1435 igrab(inode);
1436 } else {
1437 dout("ceph_queue_vmtruncate %p failed, pending=%d\n",
1438 inode, ci->i_truncate_pending);
1439 }
1440}
1441
1442/*
Sage Weil355da1e2009-10-06 11:31:08 -07001443 * called with i_mutex held.
1444 *
1445 * Make sure any pending truncation is applied before doing anything
1446 * that may depend on it.
1447 */
1448void __ceph_do_pending_vmtruncate(struct inode *inode)
1449{
1450 struct ceph_inode_info *ci = ceph_inode(inode);
1451 u64 to;
1452 int wrbuffer_refs, wake = 0;
1453
1454retry:
1455 spin_lock(&inode->i_lock);
1456 if (ci->i_truncate_pending == 0) {
1457 dout("__do_pending_vmtruncate %p none pending\n", inode);
1458 spin_unlock(&inode->i_lock);
1459 return;
1460 }
1461
1462 /*
1463 * make sure any dirty snapped pages are flushed before we
1464 * possibly truncate them.. so write AND block!
1465 */
1466 if (ci->i_wrbuffer_ref_head < ci->i_wrbuffer_ref) {
1467 dout("__do_pending_vmtruncate %p flushing snaps first\n",
1468 inode);
1469 spin_unlock(&inode->i_lock);
1470 filemap_write_and_wait_range(&inode->i_data, 0,
1471 inode->i_sb->s_maxbytes);
1472 goto retry;
1473 }
1474
1475 to = ci->i_truncate_size;
1476 wrbuffer_refs = ci->i_wrbuffer_ref;
1477 dout("__do_pending_vmtruncate %p (%d) to %lld\n", inode,
1478 ci->i_truncate_pending, to);
1479 spin_unlock(&inode->i_lock);
1480
1481 truncate_inode_pages(inode->i_mapping, to);
1482
1483 spin_lock(&inode->i_lock);
1484 ci->i_truncate_pending--;
1485 if (ci->i_truncate_pending == 0)
1486 wake = 1;
1487 spin_unlock(&inode->i_lock);
1488
1489 if (wrbuffer_refs == 0)
1490 ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL);
1491 if (wake)
1492 wake_up(&ci->i_cap_wq);
1493}
1494
1495
1496/*
1497 * symlinks
1498 */
1499static void *ceph_sym_follow_link(struct dentry *dentry, struct nameidata *nd)
1500{
1501 struct ceph_inode_info *ci = ceph_inode(dentry->d_inode);
1502 nd_set_link(nd, ci->i_symlink);
1503 return NULL;
1504}
1505
1506static const struct inode_operations ceph_symlink_iops = {
1507 .readlink = generic_readlink,
1508 .follow_link = ceph_sym_follow_link,
1509};
1510
1511/*
1512 * setattr
1513 */
1514int ceph_setattr(struct dentry *dentry, struct iattr *attr)
1515{
1516 struct inode *inode = dentry->d_inode;
1517 struct ceph_inode_info *ci = ceph_inode(inode);
1518 struct inode *parent_inode = dentry->d_parent->d_inode;
1519 const unsigned int ia_valid = attr->ia_valid;
1520 struct ceph_mds_request *req;
1521 struct ceph_mds_client *mdsc = &ceph_client(dentry->d_sb)->mdsc;
1522 int issued;
1523 int release = 0, dirtied = 0;
1524 int mask = 0;
1525 int err = 0;
Sage Weil355da1e2009-10-06 11:31:08 -07001526
1527 if (ceph_snap(inode) != CEPH_NOSNAP)
1528 return -EROFS;
1529
1530 __ceph_do_pending_vmtruncate(inode);
1531
1532 err = inode_change_ok(inode, attr);
1533 if (err != 0)
1534 return err;
1535
1536 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETATTR,
1537 USE_AUTH_MDS);
1538 if (IS_ERR(req))
1539 return PTR_ERR(req);
1540
1541 spin_lock(&inode->i_lock);
1542 issued = __ceph_caps_issued(ci, NULL);
1543 dout("setattr %p issued %s\n", inode, ceph_cap_string(issued));
1544
1545 if (ia_valid & ATTR_UID) {
1546 dout("setattr %p uid %d -> %d\n", inode,
1547 inode->i_uid, attr->ia_uid);
1548 if (issued & CEPH_CAP_AUTH_EXCL) {
1549 inode->i_uid = attr->ia_uid;
1550 dirtied |= CEPH_CAP_AUTH_EXCL;
1551 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
1552 attr->ia_uid != inode->i_uid) {
1553 req->r_args.setattr.uid = cpu_to_le32(attr->ia_uid);
1554 mask |= CEPH_SETATTR_UID;
1555 release |= CEPH_CAP_AUTH_SHARED;
1556 }
1557 }
1558 if (ia_valid & ATTR_GID) {
1559 dout("setattr %p gid %d -> %d\n", inode,
1560 inode->i_gid, attr->ia_gid);
1561 if (issued & CEPH_CAP_AUTH_EXCL) {
1562 inode->i_gid = attr->ia_gid;
1563 dirtied |= CEPH_CAP_AUTH_EXCL;
1564 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
1565 attr->ia_gid != inode->i_gid) {
1566 req->r_args.setattr.gid = cpu_to_le32(attr->ia_gid);
1567 mask |= CEPH_SETATTR_GID;
1568 release |= CEPH_CAP_AUTH_SHARED;
1569 }
1570 }
1571 if (ia_valid & ATTR_MODE) {
1572 dout("setattr %p mode 0%o -> 0%o\n", inode, inode->i_mode,
1573 attr->ia_mode);
1574 if (issued & CEPH_CAP_AUTH_EXCL) {
1575 inode->i_mode = attr->ia_mode;
1576 dirtied |= CEPH_CAP_AUTH_EXCL;
1577 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
1578 attr->ia_mode != inode->i_mode) {
1579 req->r_args.setattr.mode = cpu_to_le32(attr->ia_mode);
1580 mask |= CEPH_SETATTR_MODE;
1581 release |= CEPH_CAP_AUTH_SHARED;
1582 }
1583 }
1584
1585 if (ia_valid & ATTR_ATIME) {
1586 dout("setattr %p atime %ld.%ld -> %ld.%ld\n", inode,
1587 inode->i_atime.tv_sec, inode->i_atime.tv_nsec,
1588 attr->ia_atime.tv_sec, attr->ia_atime.tv_nsec);
1589 if (issued & CEPH_CAP_FILE_EXCL) {
1590 ci->i_time_warp_seq++;
1591 inode->i_atime = attr->ia_atime;
1592 dirtied |= CEPH_CAP_FILE_EXCL;
1593 } else if ((issued & CEPH_CAP_FILE_WR) &&
1594 timespec_compare(&inode->i_atime,
1595 &attr->ia_atime) < 0) {
1596 inode->i_atime = attr->ia_atime;
1597 dirtied |= CEPH_CAP_FILE_WR;
1598 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
1599 !timespec_equal(&inode->i_atime, &attr->ia_atime)) {
1600 ceph_encode_timespec(&req->r_args.setattr.atime,
1601 &attr->ia_atime);
1602 mask |= CEPH_SETATTR_ATIME;
1603 release |= CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_RD |
1604 CEPH_CAP_FILE_WR;
1605 }
1606 }
1607 if (ia_valid & ATTR_MTIME) {
1608 dout("setattr %p mtime %ld.%ld -> %ld.%ld\n", inode,
1609 inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec,
1610 attr->ia_mtime.tv_sec, attr->ia_mtime.tv_nsec);
1611 if (issued & CEPH_CAP_FILE_EXCL) {
1612 ci->i_time_warp_seq++;
1613 inode->i_mtime = attr->ia_mtime;
1614 dirtied |= CEPH_CAP_FILE_EXCL;
1615 } else if ((issued & CEPH_CAP_FILE_WR) &&
1616 timespec_compare(&inode->i_mtime,
1617 &attr->ia_mtime) < 0) {
1618 inode->i_mtime = attr->ia_mtime;
1619 dirtied |= CEPH_CAP_FILE_WR;
1620 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
1621 !timespec_equal(&inode->i_mtime, &attr->ia_mtime)) {
1622 ceph_encode_timespec(&req->r_args.setattr.mtime,
1623 &attr->ia_mtime);
1624 mask |= CEPH_SETATTR_MTIME;
1625 release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_RD |
1626 CEPH_CAP_FILE_WR;
1627 }
1628 }
1629 if (ia_valid & ATTR_SIZE) {
1630 dout("setattr %p size %lld -> %lld\n", inode,
1631 inode->i_size, attr->ia_size);
1632 if (attr->ia_size > inode->i_sb->s_maxbytes) {
1633 err = -EINVAL;
1634 goto out;
1635 }
1636 if ((issued & CEPH_CAP_FILE_EXCL) &&
1637 attr->ia_size > inode->i_size) {
1638 inode->i_size = attr->ia_size;
Sage Weil355da1e2009-10-06 11:31:08 -07001639 inode->i_blocks =
1640 (attr->ia_size + (1 << 9) - 1) >> 9;
1641 inode->i_ctime = attr->ia_ctime;
1642 ci->i_reported_size = attr->ia_size;
1643 dirtied |= CEPH_CAP_FILE_EXCL;
1644 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
1645 attr->ia_size != inode->i_size) {
1646 req->r_args.setattr.size = cpu_to_le64(attr->ia_size);
1647 req->r_args.setattr.old_size =
1648 cpu_to_le64(inode->i_size);
1649 mask |= CEPH_SETATTR_SIZE;
1650 release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_RD |
1651 CEPH_CAP_FILE_WR;
1652 }
1653 }
1654
1655 /* these do nothing */
1656 if (ia_valid & ATTR_CTIME) {
1657 bool only = (ia_valid & (ATTR_SIZE|ATTR_MTIME|ATTR_ATIME|
1658 ATTR_MODE|ATTR_UID|ATTR_GID)) == 0;
1659 dout("setattr %p ctime %ld.%ld -> %ld.%ld (%s)\n", inode,
1660 inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec,
1661 attr->ia_ctime.tv_sec, attr->ia_ctime.tv_nsec,
1662 only ? "ctime only" : "ignored");
1663 inode->i_ctime = attr->ia_ctime;
1664 if (only) {
1665 /*
1666 * if kernel wants to dirty ctime but nothing else,
1667 * we need to choose a cap to dirty under, or do
1668 * a almost-no-op setattr
1669 */
1670 if (issued & CEPH_CAP_AUTH_EXCL)
1671 dirtied |= CEPH_CAP_AUTH_EXCL;
1672 else if (issued & CEPH_CAP_FILE_EXCL)
1673 dirtied |= CEPH_CAP_FILE_EXCL;
1674 else if (issued & CEPH_CAP_XATTR_EXCL)
1675 dirtied |= CEPH_CAP_XATTR_EXCL;
1676 else
1677 mask |= CEPH_SETATTR_CTIME;
1678 }
1679 }
1680 if (ia_valid & ATTR_FILE)
1681 dout("setattr %p ATTR_FILE ... hrm!\n", inode);
1682
1683 if (dirtied) {
1684 __ceph_mark_dirty_caps(ci, dirtied);
1685 inode->i_ctime = CURRENT_TIME;
1686 }
1687
1688 release &= issued;
1689 spin_unlock(&inode->i_lock);
1690
Sage Weil355da1e2009-10-06 11:31:08 -07001691 if (mask) {
1692 req->r_inode = igrab(inode);
1693 req->r_inode_drop = release;
1694 req->r_args.setattr.mask = cpu_to_le32(mask);
1695 req->r_num_caps = 1;
1696 err = ceph_mdsc_do_request(mdsc, parent_inode, req);
1697 }
1698 dout("setattr %p result=%d (%s locally, %d remote)\n", inode, err,
1699 ceph_cap_string(dirtied), mask);
1700
1701 ceph_mdsc_put_request(req);
1702 __ceph_do_pending_vmtruncate(inode);
1703 return err;
1704out:
1705 spin_unlock(&inode->i_lock);
1706 ceph_mdsc_put_request(req);
1707 return err;
1708}
1709
1710/*
1711 * Verify that we have a lease on the given mask. If not,
1712 * do a getattr against an mds.
1713 */
1714int ceph_do_getattr(struct inode *inode, int mask)
1715{
1716 struct ceph_client *client = ceph_sb_to_client(inode->i_sb);
1717 struct ceph_mds_client *mdsc = &client->mdsc;
1718 struct ceph_mds_request *req;
1719 int err;
1720
1721 if (ceph_snap(inode) == CEPH_SNAPDIR) {
1722 dout("do_getattr inode %p SNAPDIR\n", inode);
1723 return 0;
1724 }
1725
1726 dout("do_getattr inode %p mask %s\n", inode, ceph_cap_string(mask));
1727 if (ceph_caps_issued_mask(ceph_inode(inode), mask, 1))
1728 return 0;
1729
1730 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS);
1731 if (IS_ERR(req))
1732 return PTR_ERR(req);
1733 req->r_inode = igrab(inode);
1734 req->r_num_caps = 1;
1735 req->r_args.getattr.mask = cpu_to_le32(mask);
1736 err = ceph_mdsc_do_request(mdsc, NULL, req);
1737 ceph_mdsc_put_request(req);
1738 dout("do_getattr result=%d\n", err);
1739 return err;
1740}
1741
1742
1743/*
1744 * Check inode permissions. We verify we have a valid value for
1745 * the AUTH cap, then call the generic handler.
1746 */
1747int ceph_permission(struct inode *inode, int mask)
1748{
1749 int err = ceph_do_getattr(inode, CEPH_CAP_AUTH_SHARED);
1750
1751 if (!err)
1752 err = generic_permission(inode, mask, NULL);
1753 return err;
1754}
1755
1756/*
1757 * Get all attributes. Hopefully somedata we'll have a statlite()
1758 * and can limit the fields we require to be accurate.
1759 */
1760int ceph_getattr(struct vfsmount *mnt, struct dentry *dentry,
1761 struct kstat *stat)
1762{
1763 struct inode *inode = dentry->d_inode;
Sage Weil232d4b02009-10-21 11:21:49 -07001764 struct ceph_inode_info *ci = ceph_inode(inode);
Sage Weil355da1e2009-10-06 11:31:08 -07001765 int err;
1766
1767 err = ceph_do_getattr(inode, CEPH_STAT_CAP_INODE_ALL);
1768 if (!err) {
1769 generic_fillattr(inode, stat);
1770 stat->ino = inode->i_ino;
1771 if (ceph_snap(inode) != CEPH_NOSNAP)
1772 stat->dev = ceph_snap(inode);
1773 else
1774 stat->dev = 0;
Sage Weil232d4b02009-10-21 11:21:49 -07001775 if (S_ISDIR(inode->i_mode)) {
1776 stat->size = ci->i_rbytes;
1777 stat->blocks = 0;
Sage Weil355da1e2009-10-06 11:31:08 -07001778 stat->blksize = 65536;
Sage Weil232d4b02009-10-21 11:21:49 -07001779 }
Sage Weil355da1e2009-10-06 11:31:08 -07001780 }
1781 return err;
1782}