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Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -07001#include <linux/ceph/ceph_debug.h>
Sage Weil355da1e2009-10-06 11:31:08 -07002
3#include <linux/module.h>
4#include <linux/fs.h>
Sage Weil355da1e2009-10-06 11:31:08 -07005#include <linux/slab.h>
6#include <linux/string.h>
7#include <linux/uaccess.h>
8#include <linux/kernel.h>
9#include <linux/namei.h>
10#include <linux/writeback.h>
11#include <linux/vmalloc.h>
Linus Torvalds4db658e2014-01-28 18:06:18 -080012#include <linux/posix_acl.h>
Sage Weil355da1e2009-10-06 11:31:08 -070013
14#include "super.h"
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -070015#include "mds_client.h"
Milosz Tanski99ccbd22013-08-21 17:29:54 -040016#include "cache.h"
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -070017#include <linux/ceph/decode.h>
Sage Weil355da1e2009-10-06 11:31:08 -070018
19/*
20 * Ceph inode operations
21 *
22 * Implement basic inode helpers (get, alloc) and inode ops (getattr,
23 * setattr, etc.), xattr helpers, and helpers for assimilating
24 * metadata returned by the MDS into our cache.
25 *
26 * Also define helpers for doing asynchronous writeback, invalidation,
27 * and truncation for the benefit of those who can't afford to block
28 * (typically because they are in the message handler path).
29 */
30
31static const struct inode_operations ceph_symlink_iops;
32
Sage Weil3c6f6b72010-02-09 15:24:44 -080033static void ceph_invalidate_work(struct work_struct *work);
34static void ceph_writeback_work(struct work_struct *work);
35static void ceph_vmtruncate_work(struct work_struct *work);
Sage Weil355da1e2009-10-06 11:31:08 -070036
37/*
38 * find or create an inode, given the ceph ino number
39 */
Yehuda Sadehad1fee92011-01-21 16:44:03 -080040static int ceph_set_ino_cb(struct inode *inode, void *data)
41{
42 ceph_inode(inode)->i_vino = *(struct ceph_vino *)data;
43 inode->i_ino = ceph_vino_to_ino(*(struct ceph_vino *)data);
44 return 0;
45}
46
Sage Weil355da1e2009-10-06 11:31:08 -070047struct inode *ceph_get_inode(struct super_block *sb, struct ceph_vino vino)
48{
49 struct inode *inode;
50 ino_t t = ceph_vino_to_ino(vino);
51
52 inode = iget5_locked(sb, t, ceph_ino_compare, ceph_set_ino_cb, &vino);
53 if (inode == NULL)
54 return ERR_PTR(-ENOMEM);
55 if (inode->i_state & I_NEW) {
56 dout("get_inode created new inode %p %llx.%llx ino %llx\n",
57 inode, ceph_vinop(inode), (u64)inode->i_ino);
58 unlock_new_inode(inode);
59 }
60
61 dout("get_inode on %lu=%llx.%llx got %p\n", inode->i_ino, vino.ino,
62 vino.snap, inode);
63 return inode;
64}
65
66/*
67 * get/constuct snapdir inode for a given directory
68 */
69struct inode *ceph_get_snapdir(struct inode *parent)
70{
71 struct ceph_vino vino = {
72 .ino = ceph_ino(parent),
73 .snap = CEPH_SNAPDIR,
74 };
75 struct inode *inode = ceph_get_inode(parent->i_sb, vino);
Sage Weilb377ff12009-11-11 15:22:37 -080076 struct ceph_inode_info *ci = ceph_inode(inode);
Sage Weil355da1e2009-10-06 11:31:08 -070077
78 BUG_ON(!S_ISDIR(parent->i_mode));
79 if (IS_ERR(inode))
Julia Lawall7e34bc52010-05-22 12:01:14 +020080 return inode;
Sage Weil355da1e2009-10-06 11:31:08 -070081 inode->i_mode = parent->i_mode;
82 inode->i_uid = parent->i_uid;
83 inode->i_gid = parent->i_gid;
84 inode->i_op = &ceph_dir_iops;
85 inode->i_fop = &ceph_dir_fops;
Sage Weilb377ff12009-11-11 15:22:37 -080086 ci->i_snap_caps = CEPH_CAP_PIN; /* so we can open */
87 ci->i_rbytes = 0;
Sage Weil355da1e2009-10-06 11:31:08 -070088 return inode;
89}
90
91const struct inode_operations ceph_file_iops = {
92 .permission = ceph_permission,
93 .setattr = ceph_setattr,
94 .getattr = ceph_getattr,
95 .setxattr = ceph_setxattr,
96 .getxattr = ceph_getxattr,
97 .listxattr = ceph_listxattr,
98 .removexattr = ceph_removexattr,
Guangliang Zhao7221fe42013-11-11 15:18:03 +080099 .get_acl = ceph_get_acl,
Sage Weil72466d02014-01-29 06:22:25 -0800100 .set_acl = ceph_set_acl,
Sage Weil355da1e2009-10-06 11:31:08 -0700101};
102
103
104/*
105 * We use a 'frag tree' to keep track of the MDS's directory fragments
106 * for a given inode (usually there is just a single fragment). We
107 * need to know when a child frag is delegated to a new MDS, or when
108 * it is flagged as replicated, so we can direct our requests
109 * accordingly.
110 */
111
112/*
113 * find/create a frag in the tree
114 */
115static struct ceph_inode_frag *__get_or_create_frag(struct ceph_inode_info *ci,
116 u32 f)
117{
118 struct rb_node **p;
119 struct rb_node *parent = NULL;
120 struct ceph_inode_frag *frag;
121 int c;
122
123 p = &ci->i_fragtree.rb_node;
124 while (*p) {
125 parent = *p;
126 frag = rb_entry(parent, struct ceph_inode_frag, node);
127 c = ceph_frag_compare(f, frag->frag);
128 if (c < 0)
129 p = &(*p)->rb_left;
130 else if (c > 0)
131 p = &(*p)->rb_right;
132 else
133 return frag;
134 }
135
136 frag = kmalloc(sizeof(*frag), GFP_NOFS);
137 if (!frag) {
138 pr_err("__get_or_create_frag ENOMEM on %p %llx.%llx "
139 "frag %x\n", &ci->vfs_inode,
140 ceph_vinop(&ci->vfs_inode), f);
141 return ERR_PTR(-ENOMEM);
142 }
143 frag->frag = f;
144 frag->split_by = 0;
145 frag->mds = -1;
146 frag->ndist = 0;
147
148 rb_link_node(&frag->node, parent, p);
149 rb_insert_color(&frag->node, &ci->i_fragtree);
150
151 dout("get_or_create_frag added %llx.%llx frag %x\n",
152 ceph_vinop(&ci->vfs_inode), f);
153 return frag;
154}
155
156/*
157 * find a specific frag @f
158 */
159struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci, u32 f)
160{
161 struct rb_node *n = ci->i_fragtree.rb_node;
162
163 while (n) {
164 struct ceph_inode_frag *frag =
165 rb_entry(n, struct ceph_inode_frag, node);
166 int c = ceph_frag_compare(f, frag->frag);
167 if (c < 0)
168 n = n->rb_left;
169 else if (c > 0)
170 n = n->rb_right;
171 else
172 return frag;
173 }
174 return NULL;
175}
176
177/*
178 * Choose frag containing the given value @v. If @pfrag is
179 * specified, copy the frag delegation info to the caller if
180 * it is present.
181 */
182u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v,
183 struct ceph_inode_frag *pfrag,
184 int *found)
185{
186 u32 t = ceph_frag_make(0, 0);
187 struct ceph_inode_frag *frag;
188 unsigned nway, i;
189 u32 n;
190
191 if (found)
192 *found = 0;
193
194 mutex_lock(&ci->i_fragtree_mutex);
195 while (1) {
196 WARN_ON(!ceph_frag_contains_value(t, v));
197 frag = __ceph_find_frag(ci, t);
198 if (!frag)
199 break; /* t is a leaf */
200 if (frag->split_by == 0) {
201 if (pfrag)
202 memcpy(pfrag, frag, sizeof(*pfrag));
203 if (found)
204 *found = 1;
205 break;
206 }
207
208 /* choose child */
209 nway = 1 << frag->split_by;
210 dout("choose_frag(%x) %x splits by %d (%d ways)\n", v, t,
211 frag->split_by, nway);
212 for (i = 0; i < nway; i++) {
213 n = ceph_frag_make_child(t, frag->split_by, i);
214 if (ceph_frag_contains_value(n, v)) {
215 t = n;
216 break;
217 }
218 }
219 BUG_ON(i == nway);
220 }
221 dout("choose_frag(%x) = %x\n", v, t);
222
223 mutex_unlock(&ci->i_fragtree_mutex);
224 return t;
225}
226
227/*
228 * Process dirfrag (delegation) info from the mds. Include leaf
229 * fragment in tree ONLY if ndist > 0. Otherwise, only
230 * branches/splits are included in i_fragtree)
231 */
232static int ceph_fill_dirfrag(struct inode *inode,
233 struct ceph_mds_reply_dirfrag *dirinfo)
234{
235 struct ceph_inode_info *ci = ceph_inode(inode);
236 struct ceph_inode_frag *frag;
237 u32 id = le32_to_cpu(dirinfo->frag);
238 int mds = le32_to_cpu(dirinfo->auth);
239 int ndist = le32_to_cpu(dirinfo->ndist);
240 int i;
241 int err = 0;
242
243 mutex_lock(&ci->i_fragtree_mutex);
244 if (ndist == 0) {
245 /* no delegation info needed. */
246 frag = __ceph_find_frag(ci, id);
247 if (!frag)
248 goto out;
249 if (frag->split_by == 0) {
250 /* tree leaf, remove */
251 dout("fill_dirfrag removed %llx.%llx frag %x"
252 " (no ref)\n", ceph_vinop(inode), id);
253 rb_erase(&frag->node, &ci->i_fragtree);
254 kfree(frag);
255 } else {
256 /* tree branch, keep and clear */
257 dout("fill_dirfrag cleared %llx.%llx frag %x"
258 " referral\n", ceph_vinop(inode), id);
259 frag->mds = -1;
260 frag->ndist = 0;
261 }
262 goto out;
263 }
264
265
266 /* find/add this frag to store mds delegation info */
267 frag = __get_or_create_frag(ci, id);
268 if (IS_ERR(frag)) {
269 /* this is not the end of the world; we can continue
270 with bad/inaccurate delegation info */
271 pr_err("fill_dirfrag ENOMEM on mds ref %llx.%llx fg %x\n",
272 ceph_vinop(inode), le32_to_cpu(dirinfo->frag));
273 err = -ENOMEM;
274 goto out;
275 }
276
277 frag->mds = mds;
278 frag->ndist = min_t(u32, ndist, CEPH_MAX_DIRFRAG_REP);
279 for (i = 0; i < frag->ndist; i++)
280 frag->dist[i] = le32_to_cpu(dirinfo->dist[i]);
281 dout("fill_dirfrag %llx.%llx frag %x ndist=%d\n",
282 ceph_vinop(inode), frag->frag, frag->ndist);
283
284out:
285 mutex_unlock(&ci->i_fragtree_mutex);
286 return err;
287}
288
289
290/*
291 * initialize a newly allocated inode.
292 */
293struct inode *ceph_alloc_inode(struct super_block *sb)
294{
295 struct ceph_inode_info *ci;
296 int i;
297
298 ci = kmem_cache_alloc(ceph_inode_cachep, GFP_NOFS);
299 if (!ci)
300 return NULL;
301
302 dout("alloc_inode %p\n", &ci->vfs_inode);
303
Sage Weilbe655592011-11-30 09:47:09 -0800304 spin_lock_init(&ci->i_ceph_lock);
305
Sage Weil355da1e2009-10-06 11:31:08 -0700306 ci->i_version = 0;
307 ci->i_time_warp_seq = 0;
308 ci->i_ceph_flags = 0;
Yan, Zheng2f276c52013-03-13 19:44:32 +0800309 atomic_set(&ci->i_release_count, 1);
310 atomic_set(&ci->i_complete_count, 0);
Sage Weil355da1e2009-10-06 11:31:08 -0700311 ci->i_symlink = NULL;
312
Sage Weil6c0f3af2010-11-16 11:14:34 -0800313 memset(&ci->i_dir_layout, 0, sizeof(ci->i_dir_layout));
314
Sage Weil355da1e2009-10-06 11:31:08 -0700315 ci->i_fragtree = RB_ROOT;
316 mutex_init(&ci->i_fragtree_mutex);
317
318 ci->i_xattrs.blob = NULL;
319 ci->i_xattrs.prealloc_blob = NULL;
320 ci->i_xattrs.dirty = false;
321 ci->i_xattrs.index = RB_ROOT;
322 ci->i_xattrs.count = 0;
323 ci->i_xattrs.names_size = 0;
324 ci->i_xattrs.vals_size = 0;
325 ci->i_xattrs.version = 0;
326 ci->i_xattrs.index_version = 0;
327
328 ci->i_caps = RB_ROOT;
329 ci->i_auth_cap = NULL;
330 ci->i_dirty_caps = 0;
331 ci->i_flushing_caps = 0;
332 INIT_LIST_HEAD(&ci->i_dirty_item);
333 INIT_LIST_HEAD(&ci->i_flushing_item);
334 ci->i_cap_flush_seq = 0;
335 ci->i_cap_flush_last_tid = 0;
336 memset(&ci->i_cap_flush_tid, 0, sizeof(ci->i_cap_flush_tid));
337 init_waitqueue_head(&ci->i_cap_wq);
338 ci->i_hold_caps_min = 0;
339 ci->i_hold_caps_max = 0;
340 INIT_LIST_HEAD(&ci->i_cap_delay_list);
Sage Weil355da1e2009-10-06 11:31:08 -0700341 INIT_LIST_HEAD(&ci->i_cap_snaps);
342 ci->i_head_snapc = NULL;
343 ci->i_snap_caps = 0;
Yan, Zheng11df2df2013-11-24 14:44:38 +0800344 ci->i_cap_exporting_issued = 0;
Sage Weil355da1e2009-10-06 11:31:08 -0700345
346 for (i = 0; i < CEPH_FILE_MODE_NUM; i++)
347 ci->i_nr_by_mode[i] = 0;
348
Yan, Zhengb0d7c222013-08-12 21:42:15 -0700349 mutex_init(&ci->i_truncate_mutex);
Sage Weil355da1e2009-10-06 11:31:08 -0700350 ci->i_truncate_seq = 0;
351 ci->i_truncate_size = 0;
352 ci->i_truncate_pending = 0;
353
354 ci->i_max_size = 0;
355 ci->i_reported_size = 0;
356 ci->i_wanted_max_size = 0;
357 ci->i_requested_max_size = 0;
358
359 ci->i_pin_ref = 0;
360 ci->i_rd_ref = 0;
361 ci->i_rdcache_ref = 0;
362 ci->i_wr_ref = 0;
Henry C Changd3d07202011-05-11 10:29:54 +0000363 ci->i_wb_ref = 0;
Sage Weil355da1e2009-10-06 11:31:08 -0700364 ci->i_wrbuffer_ref = 0;
365 ci->i_wrbuffer_ref_head = 0;
366 ci->i_shared_gen = 0;
367 ci->i_rdcache_gen = 0;
368 ci->i_rdcache_revoking = 0;
369
370 INIT_LIST_HEAD(&ci->i_unsafe_writes);
371 INIT_LIST_HEAD(&ci->i_unsafe_dirops);
372 spin_lock_init(&ci->i_unsafe_lock);
373
374 ci->i_snap_realm = NULL;
375 INIT_LIST_HEAD(&ci->i_snap_realm_item);
376 INIT_LIST_HEAD(&ci->i_snap_flush_item);
377
Sage Weil3c6f6b72010-02-09 15:24:44 -0800378 INIT_WORK(&ci->i_wb_work, ceph_writeback_work);
379 INIT_WORK(&ci->i_pg_inv_work, ceph_invalidate_work);
Sage Weil355da1e2009-10-06 11:31:08 -0700380
381 INIT_WORK(&ci->i_vmtruncate_work, ceph_vmtruncate_work);
382
Milosz Tanski99ccbd22013-08-21 17:29:54 -0400383 ceph_fscache_inode_init(ci);
384
Sage Weil355da1e2009-10-06 11:31:08 -0700385 return &ci->vfs_inode;
386}
387
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100388static void ceph_i_callback(struct rcu_head *head)
389{
390 struct inode *inode = container_of(head, struct inode, i_rcu);
391 struct ceph_inode_info *ci = ceph_inode(inode);
392
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100393 kmem_cache_free(ceph_inode_cachep, ci);
394}
395
Sage Weil355da1e2009-10-06 11:31:08 -0700396void ceph_destroy_inode(struct inode *inode)
397{
398 struct ceph_inode_info *ci = ceph_inode(inode);
399 struct ceph_inode_frag *frag;
400 struct rb_node *n;
401
402 dout("destroy_inode %p ino %llx.%llx\n", inode, ceph_vinop(inode));
403
Milosz Tanski99ccbd22013-08-21 17:29:54 -0400404 ceph_fscache_unregister_inode_cookie(ci);
405
Sage Weil355da1e2009-10-06 11:31:08 -0700406 ceph_queue_caps_release(inode);
407
Sage Weil8b218b82010-03-09 12:59:08 -0800408 /*
409 * we may still have a snap_realm reference if there are stray
410 * caps in i_cap_exporting_issued or i_snap_caps.
411 */
412 if (ci->i_snap_realm) {
413 struct ceph_mds_client *mdsc =
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700414 ceph_sb_to_client(ci->vfs_inode.i_sb)->mdsc;
Sage Weil8b218b82010-03-09 12:59:08 -0800415 struct ceph_snap_realm *realm = ci->i_snap_realm;
416
417 dout(" dropping residual ref to snap realm %p\n", realm);
418 spin_lock(&realm->inodes_with_caps_lock);
419 list_del_init(&ci->i_snap_realm_item);
420 spin_unlock(&realm->inodes_with_caps_lock);
421 ceph_put_snap_realm(mdsc, realm);
422 }
423
Sage Weil355da1e2009-10-06 11:31:08 -0700424 kfree(ci->i_symlink);
425 while ((n = rb_first(&ci->i_fragtree)) != NULL) {
426 frag = rb_entry(n, struct ceph_inode_frag, node);
427 rb_erase(n, &ci->i_fragtree);
428 kfree(frag);
429 }
430
431 __ceph_destroy_xattrs(ci);
Sage Weilb6c1d5b2009-12-07 12:17:17 -0800432 if (ci->i_xattrs.blob)
433 ceph_buffer_put(ci->i_xattrs.blob);
434 if (ci->i_xattrs.prealloc_blob)
435 ceph_buffer_put(ci->i_xattrs.prealloc_blob);
Sage Weil355da1e2009-10-06 11:31:08 -0700436
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100437 call_rcu(&inode->i_rcu, ceph_i_callback);
Sage Weil355da1e2009-10-06 11:31:08 -0700438}
439
Yan, Zheng9f12bd12013-09-20 19:55:31 +0800440int ceph_drop_inode(struct inode *inode)
441{
442 /*
443 * Positve dentry and corresponding inode are always accompanied
444 * in MDS reply. So no need to keep inode in the cache after
445 * dropping all its aliases.
446 */
447 return 1;
448}
449
Sage Weil355da1e2009-10-06 11:31:08 -0700450/*
451 * Helpers to fill in size, ctime, mtime, and atime. We have to be
452 * careful because either the client or MDS may have more up to date
453 * info, depending on which capabilities are held, and whether
454 * time_warp_seq or truncate_seq have increased. (Ordinarily, mtime
455 * and size are monotonically increasing, except when utimes() or
456 * truncate() increments the corresponding _seq values.)
457 */
458int ceph_fill_file_size(struct inode *inode, int issued,
459 u32 truncate_seq, u64 truncate_size, u64 size)
460{
461 struct ceph_inode_info *ci = ceph_inode(inode);
462 int queue_trunc = 0;
463
464 if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) > 0 ||
465 (truncate_seq == ci->i_truncate_seq && size > inode->i_size)) {
466 dout("size %lld -> %llu\n", inode->i_size, size);
467 inode->i_size = size;
468 inode->i_blocks = (size + (1<<9) - 1) >> 9;
469 ci->i_reported_size = size;
470 if (truncate_seq != ci->i_truncate_seq) {
471 dout("truncate_seq %u -> %u\n",
472 ci->i_truncate_seq, truncate_seq);
473 ci->i_truncate_seq = truncate_seq;
Yan, Zhengb0d7c222013-08-12 21:42:15 -0700474
475 /* the MDS should have revoked these caps */
476 WARN_ON_ONCE(issued & (CEPH_CAP_FILE_EXCL |
477 CEPH_CAP_FILE_RD |
478 CEPH_CAP_FILE_WR |
479 CEPH_CAP_FILE_LAZYIO));
Yehuda Sadeh3d497d82010-02-09 11:08:40 -0800480 /*
481 * If we hold relevant caps, or in the case where we're
482 * not the only client referencing this file and we
483 * don't hold those caps, then we need to check whether
484 * the file is either opened or mmaped
485 */
Yan, Zhengb0d7c222013-08-12 21:42:15 -0700486 if ((issued & (CEPH_CAP_FILE_CACHE|
487 CEPH_CAP_FILE_BUFFER)) ||
Yehuda Sadeh3d497d82010-02-09 11:08:40 -0800488 mapping_mapped(inode->i_mapping) ||
489 __ceph_caps_file_wanted(ci)) {
Sage Weil355da1e2009-10-06 11:31:08 -0700490 ci->i_truncate_pending++;
491 queue_trunc = 1;
492 }
493 }
494 }
495 if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) >= 0 &&
496 ci->i_truncate_size != truncate_size) {
497 dout("truncate_size %lld -> %llu\n", ci->i_truncate_size,
498 truncate_size);
499 ci->i_truncate_size = truncate_size;
500 }
Milosz Tanski99ccbd22013-08-21 17:29:54 -0400501
502 if (queue_trunc)
503 ceph_fscache_invalidate(inode);
504
Sage Weil355da1e2009-10-06 11:31:08 -0700505 return queue_trunc;
506}
507
508void ceph_fill_file_time(struct inode *inode, int issued,
509 u64 time_warp_seq, struct timespec *ctime,
510 struct timespec *mtime, struct timespec *atime)
511{
512 struct ceph_inode_info *ci = ceph_inode(inode);
513 int warn = 0;
514
515 if (issued & (CEPH_CAP_FILE_EXCL|
516 CEPH_CAP_FILE_WR|
Sage Weild8672d62010-11-08 09:24:34 -0800517 CEPH_CAP_FILE_BUFFER|
518 CEPH_CAP_AUTH_EXCL|
519 CEPH_CAP_XATTR_EXCL)) {
Sage Weil355da1e2009-10-06 11:31:08 -0700520 if (timespec_compare(ctime, &inode->i_ctime) > 0) {
521 dout("ctime %ld.%09ld -> %ld.%09ld inc w/ cap\n",
522 inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec,
523 ctime->tv_sec, ctime->tv_nsec);
524 inode->i_ctime = *ctime;
525 }
526 if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) > 0) {
527 /* the MDS did a utimes() */
528 dout("mtime %ld.%09ld -> %ld.%09ld "
529 "tw %d -> %d\n",
530 inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec,
531 mtime->tv_sec, mtime->tv_nsec,
532 ci->i_time_warp_seq, (int)time_warp_seq);
533
534 inode->i_mtime = *mtime;
535 inode->i_atime = *atime;
536 ci->i_time_warp_seq = time_warp_seq;
537 } else if (time_warp_seq == ci->i_time_warp_seq) {
538 /* nobody did utimes(); take the max */
539 if (timespec_compare(mtime, &inode->i_mtime) > 0) {
540 dout("mtime %ld.%09ld -> %ld.%09ld inc\n",
541 inode->i_mtime.tv_sec,
542 inode->i_mtime.tv_nsec,
543 mtime->tv_sec, mtime->tv_nsec);
544 inode->i_mtime = *mtime;
545 }
546 if (timespec_compare(atime, &inode->i_atime) > 0) {
547 dout("atime %ld.%09ld -> %ld.%09ld inc\n",
548 inode->i_atime.tv_sec,
549 inode->i_atime.tv_nsec,
550 atime->tv_sec, atime->tv_nsec);
551 inode->i_atime = *atime;
552 }
553 } else if (issued & CEPH_CAP_FILE_EXCL) {
554 /* we did a utimes(); ignore mds values */
555 } else {
556 warn = 1;
557 }
558 } else {
Sage Weild8672d62010-11-08 09:24:34 -0800559 /* we have no write|excl caps; whatever the MDS says is true */
Sage Weil355da1e2009-10-06 11:31:08 -0700560 if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) >= 0) {
561 inode->i_ctime = *ctime;
562 inode->i_mtime = *mtime;
563 inode->i_atime = *atime;
564 ci->i_time_warp_seq = time_warp_seq;
565 } else {
566 warn = 1;
567 }
568 }
569 if (warn) /* time_warp_seq shouldn't go backwards */
570 dout("%p mds time_warp_seq %llu < %u\n",
571 inode, time_warp_seq, ci->i_time_warp_seq);
572}
573
574/*
575 * Populate an inode based on info from mds. May be called on new or
576 * existing inodes.
577 */
578static int fill_inode(struct inode *inode,
579 struct ceph_mds_reply_info_in *iinfo,
580 struct ceph_mds_reply_dirfrag *dirinfo,
581 struct ceph_mds_session *session,
582 unsigned long ttl_from, int cap_fmode,
583 struct ceph_cap_reservation *caps_reservation)
584{
585 struct ceph_mds_reply_inode *info = iinfo->in;
586 struct ceph_inode_info *ci = ceph_inode(inode);
587 int i;
Sage Weildfabbed62011-07-26 11:30:02 -0700588 int issued = 0, implemented;
Sage Weil355da1e2009-10-06 11:31:08 -0700589 struct timespec mtime, atime, ctime;
590 u32 nsplits;
Yan, Zheng53e879a2013-09-18 09:29:07 +0800591 struct ceph_inode_frag *frag;
592 struct rb_node *rb_node;
Sage Weil355da1e2009-10-06 11:31:08 -0700593 struct ceph_buffer *xattr_blob = NULL;
594 int err = 0;
595 int queue_trunc = 0;
596
597 dout("fill_inode %p ino %llx.%llx v %llu had %llu\n",
598 inode, ceph_vinop(inode), le64_to_cpu(info->version),
599 ci->i_version);
600
601 /*
602 * prealloc xattr data, if it looks like we'll need it. only
603 * if len > 4 (meaning there are actually xattrs; the first 4
604 * bytes are the xattr count).
605 */
606 if (iinfo->xattr_len > 4) {
Sage Weilb6c1d5b2009-12-07 12:17:17 -0800607 xattr_blob = ceph_buffer_new(iinfo->xattr_len, GFP_NOFS);
Sage Weil355da1e2009-10-06 11:31:08 -0700608 if (!xattr_blob)
609 pr_err("fill_inode ENOMEM xattr blob %d bytes\n",
610 iinfo->xattr_len);
611 }
612
Sage Weilbe655592011-11-30 09:47:09 -0800613 spin_lock(&ci->i_ceph_lock);
Sage Weil355da1e2009-10-06 11:31:08 -0700614
615 /*
616 * provided version will be odd if inode value is projected,
Sage Weil8bd59e02010-11-08 09:23:12 -0800617 * even if stable. skip the update if we have newer stable
618 * info (ours>=theirs, e.g. due to racing mds replies), unless
619 * we are getting projected (unstable) info (in which case the
620 * version is odd, and we want ours>theirs).
621 * us them
622 * 2 2 skip
623 * 3 2 skip
624 * 3 3 update
Sage Weil355da1e2009-10-06 11:31:08 -0700625 */
626 if (le64_to_cpu(info->version) > 0 &&
Sage Weil8bd59e02010-11-08 09:23:12 -0800627 (ci->i_version & ~1) >= le64_to_cpu(info->version))
Sage Weil355da1e2009-10-06 11:31:08 -0700628 goto no_change;
Sage Weildfabbed62011-07-26 11:30:02 -0700629
Sage Weil355da1e2009-10-06 11:31:08 -0700630 issued = __ceph_caps_issued(ci, &implemented);
631 issued |= implemented | __ceph_caps_dirty(ci);
632
633 /* update inode */
634 ci->i_version = le64_to_cpu(info->version);
635 inode->i_version++;
636 inode->i_rdev = le32_to_cpu(info->rdev);
637
638 if ((issued & CEPH_CAP_AUTH_EXCL) == 0) {
639 inode->i_mode = le32_to_cpu(info->mode);
Eric W. Biedermanab871b92013-01-31 03:40:12 -0800640 inode->i_uid = make_kuid(&init_user_ns, le32_to_cpu(info->uid));
641 inode->i_gid = make_kgid(&init_user_ns, le32_to_cpu(info->gid));
Sage Weil355da1e2009-10-06 11:31:08 -0700642 dout("%p mode 0%o uid.gid %d.%d\n", inode, inode->i_mode,
Eric W. Biedermanbd2bae62013-01-31 04:05:39 -0800643 from_kuid(&init_user_ns, inode->i_uid),
644 from_kgid(&init_user_ns, inode->i_gid));
Sage Weil355da1e2009-10-06 11:31:08 -0700645 }
646
647 if ((issued & CEPH_CAP_LINK_EXCL) == 0)
Miklos Szeredibfe86842011-10-28 14:13:29 +0200648 set_nlink(inode, le32_to_cpu(info->nlink));
Sage Weil355da1e2009-10-06 11:31:08 -0700649
650 /* be careful with mtime, atime, size */
651 ceph_decode_timespec(&atime, &info->atime);
652 ceph_decode_timespec(&mtime, &info->mtime);
653 ceph_decode_timespec(&ctime, &info->ctime);
654 queue_trunc = ceph_fill_file_size(inode, issued,
655 le32_to_cpu(info->truncate_seq),
656 le64_to_cpu(info->truncate_size),
Sage Weil355da1e2009-10-06 11:31:08 -0700657 le64_to_cpu(info->size));
658 ceph_fill_file_time(inode, issued,
659 le32_to_cpu(info->time_warp_seq),
660 &ctime, &mtime, &atime);
661
Sage Weil355da1e2009-10-06 11:31:08 -0700662 ci->i_layout = info->layout;
663 inode->i_blkbits = fls(le32_to_cpu(info->layout.fl_stripe_unit)) - 1;
664
665 /* xattrs */
666 /* note that if i_xattrs.len <= 4, i_xattrs.data will still be NULL. */
667 if ((issued & CEPH_CAP_XATTR_EXCL) == 0 &&
668 le64_to_cpu(info->xattr_version) > ci->i_xattrs.version) {
669 if (ci->i_xattrs.blob)
670 ceph_buffer_put(ci->i_xattrs.blob);
671 ci->i_xattrs.blob = xattr_blob;
672 if (xattr_blob)
673 memcpy(ci->i_xattrs.blob->vec.iov_base,
674 iinfo->xattr_data, iinfo->xattr_len);
675 ci->i_xattrs.version = le64_to_cpu(info->xattr_version);
Guangliang Zhao7221fe42013-11-11 15:18:03 +0800676 ceph_forget_all_cached_acls(inode);
Sage Weila6424e42010-04-29 09:28:11 -0700677 xattr_blob = NULL;
Sage Weil355da1e2009-10-06 11:31:08 -0700678 }
679
680 inode->i_mapping->a_ops = &ceph_aops;
681 inode->i_mapping->backing_dev_info =
Cheng Renquan640ef792010-03-26 17:40:33 +0800682 &ceph_sb_to_client(inode->i_sb)->backing_dev_info;
Sage Weil355da1e2009-10-06 11:31:08 -0700683
684 switch (inode->i_mode & S_IFMT) {
685 case S_IFIFO:
686 case S_IFBLK:
687 case S_IFCHR:
688 case S_IFSOCK:
689 init_special_inode(inode, inode->i_mode, inode->i_rdev);
690 inode->i_op = &ceph_file_iops;
691 break;
692 case S_IFREG:
693 inode->i_op = &ceph_file_iops;
694 inode->i_fop = &ceph_file_fops;
695 break;
696 case S_IFLNK:
697 inode->i_op = &ceph_symlink_iops;
698 if (!ci->i_symlink) {
Xi Wang810339ec2012-02-03 09:55:36 -0500699 u32 symlen = iinfo->symlink_len;
Sage Weil355da1e2009-10-06 11:31:08 -0700700 char *sym;
701
Sage Weilbe655592011-11-30 09:47:09 -0800702 spin_unlock(&ci->i_ceph_lock);
Sage Weil355da1e2009-10-06 11:31:08 -0700703
Xi Wang810339ec2012-02-03 09:55:36 -0500704 err = -EINVAL;
705 if (WARN_ON(symlen != inode->i_size))
706 goto out;
707
Sage Weil355da1e2009-10-06 11:31:08 -0700708 err = -ENOMEM;
Xi Wang810339ec2012-02-03 09:55:36 -0500709 sym = kstrndup(iinfo->symlink, symlen, GFP_NOFS);
Sage Weil355da1e2009-10-06 11:31:08 -0700710 if (!sym)
711 goto out;
Sage Weil355da1e2009-10-06 11:31:08 -0700712
Sage Weilbe655592011-11-30 09:47:09 -0800713 spin_lock(&ci->i_ceph_lock);
Sage Weil355da1e2009-10-06 11:31:08 -0700714 if (!ci->i_symlink)
715 ci->i_symlink = sym;
716 else
717 kfree(sym); /* lost a race */
718 }
719 break;
720 case S_IFDIR:
721 inode->i_op = &ceph_dir_iops;
722 inode->i_fop = &ceph_dir_fops;
723
Sage Weil14303d22010-12-14 17:37:52 -0800724 ci->i_dir_layout = iinfo->dir_layout;
725
Sage Weil355da1e2009-10-06 11:31:08 -0700726 ci->i_files = le64_to_cpu(info->files);
727 ci->i_subdirs = le64_to_cpu(info->subdirs);
728 ci->i_rbytes = le64_to_cpu(info->rbytes);
729 ci->i_rfiles = le64_to_cpu(info->rfiles);
730 ci->i_rsubdirs = le64_to_cpu(info->rsubdirs);
731 ceph_decode_timespec(&ci->i_rctime, &info->rctime);
Sage Weil355da1e2009-10-06 11:31:08 -0700732 break;
733 default:
734 pr_err("fill_inode %llx.%llx BAD mode 0%o\n",
735 ceph_vinop(inode), inode->i_mode);
736 }
737
Yan, Zhenga8673d62013-02-18 16:38:14 +0800738 /* set dir completion flag? */
739 if (S_ISDIR(inode->i_mode) &&
740 ci->i_files == 0 && ci->i_subdirs == 0 &&
741 ceph_snap(inode) == CEPH_NOSNAP &&
742 (le32_to_cpu(info->cap.caps) & CEPH_CAP_FILE_SHARED) &&
743 (issued & CEPH_CAP_FILE_EXCL) == 0 &&
Yan, Zheng2f276c52013-03-13 19:44:32 +0800744 !__ceph_dir_is_complete(ci)) {
Yan, Zhenga8673d62013-02-18 16:38:14 +0800745 dout(" marking %p complete (empty)\n", inode);
Yan, Zheng2f276c52013-03-13 19:44:32 +0800746 __ceph_dir_set_complete(ci, atomic_read(&ci->i_release_count));
Yan, Zhenga8673d62013-02-18 16:38:14 +0800747 }
Sage Weil355da1e2009-10-06 11:31:08 -0700748no_change:
Yan, Zheng8c93cd62014-03-08 20:12:23 +0800749 /* only update max_size on auth cap */
750 if ((info->cap.flags & CEPH_CAP_FLAG_AUTH) &&
751 ci->i_max_size != le64_to_cpu(info->max_size)) {
752 dout("max_size %lld -> %llu\n", ci->i_max_size,
753 le64_to_cpu(info->max_size));
754 ci->i_max_size = le64_to_cpu(info->max_size);
755 }
756
Sage Weilbe655592011-11-30 09:47:09 -0800757 spin_unlock(&ci->i_ceph_lock);
Sage Weil355da1e2009-10-06 11:31:08 -0700758
759 /* queue truncate if we saw i_size decrease */
760 if (queue_trunc)
Sage Weil3c6f6b72010-02-09 15:24:44 -0800761 ceph_queue_vmtruncate(inode);
Sage Weil355da1e2009-10-06 11:31:08 -0700762
763 /* populate frag tree */
764 /* FIXME: move me up, if/when version reflects fragtree changes */
765 nsplits = le32_to_cpu(info->fragtree.nsplits);
766 mutex_lock(&ci->i_fragtree_mutex);
Yan, Zheng53e879a2013-09-18 09:29:07 +0800767 rb_node = rb_first(&ci->i_fragtree);
Sage Weil355da1e2009-10-06 11:31:08 -0700768 for (i = 0; i < nsplits; i++) {
769 u32 id = le32_to_cpu(info->fragtree.splits[i].frag);
Yan, Zheng53e879a2013-09-18 09:29:07 +0800770 frag = NULL;
771 while (rb_node) {
772 frag = rb_entry(rb_node, struct ceph_inode_frag, node);
773 if (ceph_frag_compare(frag->frag, id) >= 0) {
774 if (frag->frag != id)
775 frag = NULL;
776 else
777 rb_node = rb_next(rb_node);
778 break;
779 }
780 rb_node = rb_next(rb_node);
781 rb_erase(&frag->node, &ci->i_fragtree);
782 kfree(frag);
783 frag = NULL;
784 }
785 if (!frag) {
786 frag = __get_or_create_frag(ci, id);
787 if (IS_ERR(frag))
788 continue;
789 }
Sage Weil355da1e2009-10-06 11:31:08 -0700790 frag->split_by = le32_to_cpu(info->fragtree.splits[i].by);
791 dout(" frag %x split by %d\n", frag->frag, frag->split_by);
792 }
Yan, Zheng53e879a2013-09-18 09:29:07 +0800793 while (rb_node) {
794 frag = rb_entry(rb_node, struct ceph_inode_frag, node);
795 rb_node = rb_next(rb_node);
796 rb_erase(&frag->node, &ci->i_fragtree);
797 kfree(frag);
798 }
Sage Weil355da1e2009-10-06 11:31:08 -0700799 mutex_unlock(&ci->i_fragtree_mutex);
800
801 /* were we issued a capability? */
802 if (info->cap.caps) {
803 if (ceph_snap(inode) == CEPH_NOSNAP) {
804 ceph_add_cap(inode, session,
805 le64_to_cpu(info->cap.cap_id),
806 cap_fmode,
807 le32_to_cpu(info->cap.caps),
808 le32_to_cpu(info->cap.wanted),
809 le32_to_cpu(info->cap.seq),
810 le32_to_cpu(info->cap.mseq),
811 le64_to_cpu(info->cap.realm),
812 info->cap.flags,
813 caps_reservation);
814 } else {
Sage Weilbe655592011-11-30 09:47:09 -0800815 spin_lock(&ci->i_ceph_lock);
Sage Weil355da1e2009-10-06 11:31:08 -0700816 dout(" %p got snap_caps %s\n", inode,
817 ceph_cap_string(le32_to_cpu(info->cap.caps)));
818 ci->i_snap_caps |= le32_to_cpu(info->cap.caps);
819 if (cap_fmode >= 0)
820 __ceph_get_fmode(ci, cap_fmode);
Sage Weilbe655592011-11-30 09:47:09 -0800821 spin_unlock(&ci->i_ceph_lock);
Sage Weil355da1e2009-10-06 11:31:08 -0700822 }
Sage Weil04d000e2010-05-07 11:26:34 -0700823 } else if (cap_fmode >= 0) {
Fabian Frederickf3ae1b92014-06-06 14:35:37 -0700824 pr_warn("mds issued no caps on %llx.%llx\n",
Sage Weil04d000e2010-05-07 11:26:34 -0700825 ceph_vinop(inode));
826 __ceph_get_fmode(ci, cap_fmode);
Sage Weil355da1e2009-10-06 11:31:08 -0700827 }
828
829 /* update delegation info? */
830 if (dirinfo)
831 ceph_fill_dirfrag(inode, dirinfo);
832
833 err = 0;
834
835out:
Sage Weilb6c1d5b2009-12-07 12:17:17 -0800836 if (xattr_blob)
837 ceph_buffer_put(xattr_blob);
Sage Weil355da1e2009-10-06 11:31:08 -0700838 return err;
839}
840
841/*
842 * caller should hold session s_mutex.
843 */
844static void update_dentry_lease(struct dentry *dentry,
845 struct ceph_mds_reply_lease *lease,
846 struct ceph_mds_session *session,
847 unsigned long from_time)
848{
849 struct ceph_dentry_info *di = ceph_dentry(dentry);
850 long unsigned duration = le32_to_cpu(lease->duration_ms);
851 long unsigned ttl = from_time + (duration * HZ) / 1000;
852 long unsigned half_ttl = from_time + (duration * HZ / 2) / 1000;
853 struct inode *dir;
854
855 /* only track leases on regular dentries */
856 if (dentry->d_op != &ceph_dentry_ops)
857 return;
858
859 spin_lock(&dentry->d_lock);
Sage Weil2f90b852011-07-26 11:28:25 -0700860 dout("update_dentry_lease %p duration %lu ms ttl %lu\n",
861 dentry, duration, ttl);
Sage Weil355da1e2009-10-06 11:31:08 -0700862
863 /* make lease_rdcache_gen match directory */
864 dir = dentry->d_parent->d_inode;
865 di->lease_shared_gen = ceph_inode(dir)->i_shared_gen;
866
Sage Weil2f90b852011-07-26 11:28:25 -0700867 if (duration == 0)
Sage Weil355da1e2009-10-06 11:31:08 -0700868 goto out_unlock;
869
870 if (di->lease_gen == session->s_cap_gen &&
871 time_before(ttl, dentry->d_time))
872 goto out_unlock; /* we already have a newer lease. */
873
874 if (di->lease_session && di->lease_session != session)
875 goto out_unlock;
876
877 ceph_dentry_lru_touch(dentry);
878
879 if (!di->lease_session)
880 di->lease_session = ceph_get_mds_session(session);
881 di->lease_gen = session->s_cap_gen;
882 di->lease_seq = le32_to_cpu(lease->seq);
883 di->lease_renew_after = half_ttl;
884 di->lease_renew_from = 0;
885 dentry->d_time = ttl;
886out_unlock:
887 spin_unlock(&dentry->d_lock);
888 return;
889}
890
891/*
Sage Weil1cd39352010-05-03 22:08:02 -0700892 * splice a dentry to an inode.
893 * caller must hold directory i_mutex for this to be safe.
894 *
895 * we will only rehash the resulting dentry if @prehash is
896 * true; @prehash will be set to false (for the benefit of
897 * the caller) if we fail.
898 */
899static struct dentry *splice_dentry(struct dentry *dn, struct inode *in,
Yan, Zheng0a8a70f2014-04-14 13:13:02 +0800900 bool *prehash)
Sage Weil1cd39352010-05-03 22:08:02 -0700901{
902 struct dentry *realdn;
903
904 BUG_ON(dn->d_inode);
905
906 /* dn must be unhashed */
907 if (!d_unhashed(dn))
908 d_drop(dn);
909 realdn = d_materialise_unique(dn, in);
910 if (IS_ERR(realdn)) {
Sage Weild69ed052010-06-21 10:38:14 -0700911 pr_err("splice_dentry error %ld %p inode %p ino %llx.%llx\n",
912 PTR_ERR(realdn), dn, in, ceph_vinop(in));
Sage Weil1cd39352010-05-03 22:08:02 -0700913 if (prehash)
914 *prehash = false; /* don't rehash on error */
915 dn = realdn; /* note realdn contains the error */
916 goto out;
917 } else if (realdn) {
918 dout("dn %p (%d) spliced with %p (%d) "
919 "inode %p ino %llx.%llx\n",
Al Viro84d08fa2013-07-05 18:59:33 +0400920 dn, d_count(dn),
921 realdn, d_count(realdn),
Sage Weil1cd39352010-05-03 22:08:02 -0700922 realdn->d_inode, ceph_vinop(realdn->d_inode));
923 dput(dn);
924 dn = realdn;
925 } else {
926 BUG_ON(!ceph_dentry(dn));
927 dout("dn %p attached to %p ino %llx.%llx\n",
928 dn, dn->d_inode, ceph_vinop(dn->d_inode));
929 }
930 if ((!prehash || *prehash) && d_unhashed(dn))
931 d_rehash(dn);
Sage Weil1cd39352010-05-03 22:08:02 -0700932out:
933 return dn;
934}
935
936/*
Sage Weil355da1e2009-10-06 11:31:08 -0700937 * Incorporate results into the local cache. This is either just
938 * one inode, or a directory, dentry, and possibly linked-to inode (e.g.,
939 * after a lookup).
940 *
941 * A reply may contain
942 * a directory inode along with a dentry.
943 * and/or a target inode
944 *
945 * Called with snap_rwsem (read).
946 */
947int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req,
948 struct ceph_mds_session *session)
949{
950 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
951 struct inode *in = NULL;
Sage Weil355da1e2009-10-06 11:31:08 -0700952 struct ceph_vino vino;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700953 struct ceph_fs_client *fsc = ceph_sb_to_client(sb);
Sage Weil355da1e2009-10-06 11:31:08 -0700954 int err = 0;
955
956 dout("fill_trace %p is_dentry %d is_target %d\n", req,
957 rinfo->head->is_dentry, rinfo->head->is_target);
958
959#if 0
960 /*
961 * Debugging hook:
962 *
963 * If we resend completed ops to a recovering mds, we get no
964 * trace. Since that is very rare, pretend this is the case
965 * to ensure the 'no trace' handlers in the callers behave.
966 *
967 * Fill in inodes unconditionally to avoid breaking cap
968 * invariants.
969 */
970 if (rinfo->head->op & CEPH_MDS_OP_WRITE) {
971 pr_info("fill_trace faking empty trace on %lld %s\n",
972 req->r_tid, ceph_mds_op_name(rinfo->head->op));
973 if (rinfo->head->is_dentry) {
974 rinfo->head->is_dentry = 0;
975 err = fill_inode(req->r_locked_dir,
976 &rinfo->diri, rinfo->dirfrag,
977 session, req->r_request_started, -1);
978 }
979 if (rinfo->head->is_target) {
980 rinfo->head->is_target = 0;
981 ininfo = rinfo->targeti.in;
982 vino.ino = le64_to_cpu(ininfo->ino);
983 vino.snap = le64_to_cpu(ininfo->snapid);
984 in = ceph_get_inode(sb, vino);
985 err = fill_inode(in, &rinfo->targeti, NULL,
986 session, req->r_request_started,
987 req->r_fmode);
988 iput(in);
989 }
990 }
991#endif
992
993 if (!rinfo->head->is_target && !rinfo->head->is_dentry) {
994 dout("fill_trace reply is empty!\n");
Sage Weil167c9e32010-05-14 10:02:57 -0700995 if (rinfo->head->result == 0 && req->r_locked_dir)
996 ceph_invalidate_dir_request(req);
Sage Weil355da1e2009-10-06 11:31:08 -0700997 return 0;
998 }
999
1000 if (rinfo->head->is_dentry) {
Sage Weil5b1daec2010-01-25 11:33:08 -08001001 struct inode *dir = req->r_locked_dir;
1002
Sage Weil6c5e50f2012-08-21 15:55:25 -07001003 if (dir) {
1004 err = fill_inode(dir, &rinfo->diri, rinfo->dirfrag,
1005 session, req->r_request_started, -1,
1006 &req->r_caps_reservation);
1007 if (err < 0)
Yan, Zheng19913b42014-03-06 16:40:32 +08001008 goto done;
Sage Weil6c5e50f2012-08-21 15:55:25 -07001009 } else {
1010 WARN_ON_ONCE(1);
1011 }
Yan, Zheng19913b42014-03-06 16:40:32 +08001012
1013 if (dir && req->r_op == CEPH_MDS_OP_LOOKUPNAME) {
1014 struct qstr dname;
1015 struct dentry *dn, *parent;
1016
1017 BUG_ON(!rinfo->head->is_target);
1018 BUG_ON(req->r_dentry);
1019
1020 parent = d_find_any_alias(dir);
1021 BUG_ON(!parent);
1022
1023 dname.name = rinfo->dname;
1024 dname.len = rinfo->dname_len;
1025 dname.hash = full_name_hash(dname.name, dname.len);
1026 vino.ino = le64_to_cpu(rinfo->targeti.in->ino);
1027 vino.snap = le64_to_cpu(rinfo->targeti.in->snapid);
1028retry_lookup:
1029 dn = d_lookup(parent, &dname);
1030 dout("d_lookup on parent=%p name=%.*s got %p\n",
1031 parent, dname.len, dname.name, dn);
1032
1033 if (!dn) {
1034 dn = d_alloc(parent, &dname);
1035 dout("d_alloc %p '%.*s' = %p\n", parent,
1036 dname.len, dname.name, dn);
1037 if (dn == NULL) {
1038 dput(parent);
1039 err = -ENOMEM;
1040 goto done;
1041 }
1042 err = ceph_init_dentry(dn);
1043 if (err < 0) {
1044 dput(dn);
1045 dput(parent);
1046 goto done;
1047 }
1048 } else if (dn->d_inode &&
1049 (ceph_ino(dn->d_inode) != vino.ino ||
1050 ceph_snap(dn->d_inode) != vino.snap)) {
1051 dout(" dn %p points to wrong inode %p\n",
1052 dn, dn->d_inode);
1053 d_delete(dn);
1054 dput(dn);
1055 goto retry_lookup;
1056 }
1057
1058 req->r_dentry = dn;
1059 dput(parent);
1060 }
Sage Weil5b1daec2010-01-25 11:33:08 -08001061 }
1062
Yan, Zheng86b58d12013-12-05 12:38:59 +08001063 if (rinfo->head->is_target) {
1064 vino.ino = le64_to_cpu(rinfo->targeti.in->ino);
1065 vino.snap = le64_to_cpu(rinfo->targeti.in->snapid);
1066
1067 in = ceph_get_inode(sb, vino);
1068 if (IS_ERR(in)) {
1069 err = PTR_ERR(in);
1070 goto done;
1071 }
1072 req->r_target_inode = in;
1073
1074 err = fill_inode(in, &rinfo->targeti, NULL,
1075 session, req->r_request_started,
Yan, Zheng48193012014-04-01 20:34:18 +08001076 (!req->r_aborted && rinfo->head->result == 0) ?
Yan, Zheng86b58d12013-12-05 12:38:59 +08001077 req->r_fmode : -1,
1078 &req->r_caps_reservation);
1079 if (err < 0) {
1080 pr_err("fill_inode badness %p %llx.%llx\n",
1081 in, ceph_vinop(in));
1082 goto done;
1083 }
1084 }
1085
Sage Weil9358c6d2010-03-30 13:54:41 -07001086 /*
1087 * ignore null lease/binding on snapdir ENOENT, or else we
1088 * will have trouble splicing in the virtual snapdir later
1089 */
1090 if (rinfo->head->is_dentry && !req->r_aborted &&
Sage Weil6c5e50f2012-08-21 15:55:25 -07001091 req->r_locked_dir &&
Sage Weil9358c6d2010-03-30 13:54:41 -07001092 (rinfo->head->is_target || strncmp(req->r_dentry->d_name.name,
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -07001093 fsc->mount_options->snapdir_name,
Sage Weil9358c6d2010-03-30 13:54:41 -07001094 req->r_dentry->d_name.len))) {
Sage Weil355da1e2009-10-06 11:31:08 -07001095 /*
1096 * lookup link rename : null -> possibly existing inode
1097 * mknod symlink mkdir : null -> new inode
1098 * unlink : linked -> null
1099 */
1100 struct inode *dir = req->r_locked_dir;
1101 struct dentry *dn = req->r_dentry;
1102 bool have_dir_cap, have_lease;
1103
1104 BUG_ON(!dn);
1105 BUG_ON(!dir);
1106 BUG_ON(dn->d_parent->d_inode != dir);
1107 BUG_ON(ceph_ino(dir) !=
1108 le64_to_cpu(rinfo->diri.in->ino));
1109 BUG_ON(ceph_snap(dir) !=
1110 le64_to_cpu(rinfo->diri.in->snapid));
1111
Sage Weil355da1e2009-10-06 11:31:08 -07001112 /* do we have a lease on the whole dir? */
1113 have_dir_cap =
1114 (le32_to_cpu(rinfo->diri.in->cap.caps) &
1115 CEPH_CAP_FILE_SHARED);
1116
1117 /* do we have a dn lease? */
1118 have_lease = have_dir_cap ||
Sage Weil2f90b852011-07-26 11:28:25 -07001119 le32_to_cpu(rinfo->dlease->duration_ms);
Sage Weil355da1e2009-10-06 11:31:08 -07001120 if (!have_lease)
1121 dout("fill_trace no dentry lease or dir cap\n");
1122
1123 /* rename? */
1124 if (req->r_old_dentry && req->r_op == CEPH_MDS_OP_RENAME) {
Yan, Zheng0a8a70f2014-04-14 13:13:02 +08001125 struct inode *olddir = req->r_old_dentry_dir;
1126 BUG_ON(!olddir);
1127
Sage Weil355da1e2009-10-06 11:31:08 -07001128 dout(" src %p '%.*s' dst %p '%.*s'\n",
1129 req->r_old_dentry,
1130 req->r_old_dentry->d_name.len,
1131 req->r_old_dentry->d_name.name,
1132 dn, dn->d_name.len, dn->d_name.name);
1133 dout("fill_trace doing d_move %p -> %p\n",
1134 req->r_old_dentry, dn);
Sage Weilc10f5e12010-04-16 12:56:11 -07001135
Sage Weil355da1e2009-10-06 11:31:08 -07001136 d_move(req->r_old_dentry, dn);
1137 dout(" src %p '%.*s' dst %p '%.*s'\n",
1138 req->r_old_dentry,
1139 req->r_old_dentry->d_name.len,
1140 req->r_old_dentry->d_name.name,
1141 dn, dn->d_name.len, dn->d_name.name);
Sage Weil81a6cf22010-05-14 09:35:38 -07001142
Sage Weilc4a29f22009-12-21 11:42:18 -08001143 /* ensure target dentry is invalidated, despite
1144 rehashing bug in vfs_rename_dir */
Sage Weil81a6cf22010-05-14 09:35:38 -07001145 ceph_invalidate_dentry_lease(dn);
1146
Yan, Zheng0a8a70f2014-04-14 13:13:02 +08001147 /* d_move screws up sibling dentries' offsets */
1148 ceph_dir_clear_complete(dir);
1149 ceph_dir_clear_complete(olddir);
1150
Milosz Tanski99ccbd22013-08-21 17:29:54 -04001151 dout("dn %p gets new offset %lld\n", req->r_old_dentry,
Sage Weil1cd39352010-05-03 22:08:02 -07001152 ceph_dentry(req->r_old_dentry)->offset);
Sage Weil81a6cf22010-05-14 09:35:38 -07001153
Sage Weil355da1e2009-10-06 11:31:08 -07001154 dn = req->r_old_dentry; /* use old_dentry */
Sage Weil355da1e2009-10-06 11:31:08 -07001155 }
1156
1157 /* null dentry? */
1158 if (!rinfo->head->is_target) {
1159 dout("fill_trace null dentry\n");
1160 if (dn->d_inode) {
1161 dout("d_delete %p\n", dn);
1162 d_delete(dn);
1163 } else {
1164 dout("d_instantiate %p NULL\n", dn);
1165 d_instantiate(dn, NULL);
1166 if (have_lease && d_unhashed(dn))
1167 d_rehash(dn);
1168 update_dentry_lease(dn, rinfo->dlease,
1169 session,
1170 req->r_request_started);
1171 }
1172 goto done;
1173 }
1174
1175 /* attach proper inode */
Yan, Zheng86b58d12013-12-05 12:38:59 +08001176 if (!dn->d_inode) {
Yan, Zheng0a8a70f2014-04-14 13:13:02 +08001177 ceph_dir_clear_complete(dir);
Yan, Zheng86b58d12013-12-05 12:38:59 +08001178 ihold(in);
Yan, Zheng0a8a70f2014-04-14 13:13:02 +08001179 dn = splice_dentry(dn, in, &have_lease);
Sage Weil355da1e2009-10-06 11:31:08 -07001180 if (IS_ERR(dn)) {
1181 err = PTR_ERR(dn);
1182 goto done;
1183 }
1184 req->r_dentry = dn; /* may have spliced */
Yan, Zheng86b58d12013-12-05 12:38:59 +08001185 } else if (dn->d_inode && dn->d_inode != in) {
Sage Weil355da1e2009-10-06 11:31:08 -07001186 dout(" %p links to %p %llx.%llx, not %llx.%llx\n",
Yan, Zheng86b58d12013-12-05 12:38:59 +08001187 dn, dn->d_inode, ceph_vinop(dn->d_inode),
1188 ceph_vinop(in));
Sage Weil355da1e2009-10-06 11:31:08 -07001189 have_lease = false;
Sage Weil355da1e2009-10-06 11:31:08 -07001190 }
1191
1192 if (have_lease)
1193 update_dentry_lease(dn, rinfo->dlease, session,
1194 req->r_request_started);
1195 dout(" final dn %p\n", dn);
Yan, Zheng86b58d12013-12-05 12:38:59 +08001196 } else if (!req->r_aborted &&
1197 (req->r_op == CEPH_MDS_OP_LOOKUPSNAP ||
1198 req->r_op == CEPH_MDS_OP_MKSNAP)) {
Sage Weil355da1e2009-10-06 11:31:08 -07001199 struct dentry *dn = req->r_dentry;
Yan, Zheng0a8a70f2014-04-14 13:13:02 +08001200 struct inode *dir = req->r_locked_dir;
Sage Weil355da1e2009-10-06 11:31:08 -07001201
1202 /* fill out a snapdir LOOKUPSNAP dentry */
1203 BUG_ON(!dn);
Yan, Zheng0a8a70f2014-04-14 13:13:02 +08001204 BUG_ON(!dir);
1205 BUG_ON(ceph_snap(dir) != CEPH_SNAPDIR);
Sage Weil355da1e2009-10-06 11:31:08 -07001206 dout(" linking snapped dir %p to dn %p\n", in, dn);
Yan, Zheng0a8a70f2014-04-14 13:13:02 +08001207 ceph_dir_clear_complete(dir);
Yan, Zheng86b58d12013-12-05 12:38:59 +08001208 ihold(in);
Yan, Zheng0a8a70f2014-04-14 13:13:02 +08001209 dn = splice_dentry(dn, in, NULL);
Sage Weil355da1e2009-10-06 11:31:08 -07001210 if (IS_ERR(dn)) {
1211 err = PTR_ERR(dn);
1212 goto done;
1213 }
1214 req->r_dentry = dn; /* may have spliced */
Sage Weil355da1e2009-10-06 11:31:08 -07001215 }
Sage Weil355da1e2009-10-06 11:31:08 -07001216done:
1217 dout("fill_trace done err=%d\n", err);
1218 return err;
1219}
1220
1221/*
1222 * Prepopulate our cache with readdir results, leases, etc.
1223 */
Sage Weil79f9f992013-01-29 02:55:31 -05001224static int readdir_prepopulate_inodes_only(struct ceph_mds_request *req,
1225 struct ceph_mds_session *session)
1226{
1227 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
1228 int i, err = 0;
1229
1230 for (i = 0; i < rinfo->dir_nr; i++) {
1231 struct ceph_vino vino;
1232 struct inode *in;
1233 int rc;
1234
1235 vino.ino = le64_to_cpu(rinfo->dir_in[i].in->ino);
1236 vino.snap = le64_to_cpu(rinfo->dir_in[i].in->snapid);
1237
1238 in = ceph_get_inode(req->r_dentry->d_sb, vino);
1239 if (IS_ERR(in)) {
1240 err = PTR_ERR(in);
1241 dout("new_inode badness got %d\n", err);
1242 continue;
1243 }
1244 rc = fill_inode(in, &rinfo->dir_in[i], NULL, session,
1245 req->r_request_started, -1,
1246 &req->r_caps_reservation);
1247 if (rc < 0) {
1248 pr_err("fill_inode badness on %p got %d\n", in, rc);
1249 err = rc;
1250 continue;
1251 }
1252 }
1253
1254 return err;
1255}
1256
Sage Weil355da1e2009-10-06 11:31:08 -07001257int ceph_readdir_prepopulate(struct ceph_mds_request *req,
1258 struct ceph_mds_session *session)
1259{
1260 struct dentry *parent = req->r_dentry;
1261 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
1262 struct qstr dname;
1263 struct dentry *dn;
1264 struct inode *in;
Yan, Zheng86b58d12013-12-05 12:38:59 +08001265 int err = 0, ret, i;
Sage Weil355da1e2009-10-06 11:31:08 -07001266 struct inode *snapdir = NULL;
1267 struct ceph_mds_request_head *rhead = req->r_request->front.iov_base;
Sage Weil355da1e2009-10-06 11:31:08 -07001268 struct ceph_dentry_info *di;
Yan, Zheng81c6aea2013-09-18 09:44:13 +08001269 u64 r_readdir_offset = req->r_readdir_offset;
1270 u32 frag = le32_to_cpu(rhead->args.readdir.frag);
1271
1272 if (rinfo->dir_dir &&
1273 le32_to_cpu(rinfo->dir_dir->frag) != frag) {
1274 dout("readdir_prepopulate got new frag %x -> %x\n",
1275 frag, le32_to_cpu(rinfo->dir_dir->frag));
1276 frag = le32_to_cpu(rinfo->dir_dir->frag);
1277 if (ceph_frag_is_leftmost(frag))
1278 r_readdir_offset = 2;
1279 else
1280 r_readdir_offset = 0;
1281 }
Sage Weil355da1e2009-10-06 11:31:08 -07001282
Sage Weil79f9f992013-01-29 02:55:31 -05001283 if (req->r_aborted)
1284 return readdir_prepopulate_inodes_only(req, session);
1285
Sage Weil355da1e2009-10-06 11:31:08 -07001286 if (le32_to_cpu(rinfo->head->op) == CEPH_MDS_OP_LSSNAP) {
1287 snapdir = ceph_get_snapdir(parent->d_inode);
1288 parent = d_find_alias(snapdir);
1289 dout("readdir_prepopulate %d items under SNAPDIR dn %p\n",
1290 rinfo->dir_nr, parent);
1291 } else {
1292 dout("readdir_prepopulate %d items under dn %p\n",
1293 rinfo->dir_nr, parent);
1294 if (rinfo->dir_dir)
1295 ceph_fill_dirfrag(parent->d_inode, rinfo->dir_dir);
1296 }
1297
Yan, Zheng86b58d12013-12-05 12:38:59 +08001298 /* FIXME: release caps/leases if error occurs */
Sage Weil355da1e2009-10-06 11:31:08 -07001299 for (i = 0; i < rinfo->dir_nr; i++) {
1300 struct ceph_vino vino;
1301
1302 dname.name = rinfo->dir_dname[i];
1303 dname.len = rinfo->dir_dname_len[i];
1304 dname.hash = full_name_hash(dname.name, dname.len);
1305
1306 vino.ino = le64_to_cpu(rinfo->dir_in[i].in->ino);
1307 vino.snap = le64_to_cpu(rinfo->dir_in[i].in->snapid);
1308
1309retry_lookup:
1310 dn = d_lookup(parent, &dname);
1311 dout("d_lookup on parent=%p name=%.*s got %p\n",
1312 parent, dname.len, dname.name, dn);
1313
1314 if (!dn) {
1315 dn = d_alloc(parent, &dname);
1316 dout("d_alloc %p '%.*s' = %p\n", parent,
1317 dname.len, dname.name, dn);
1318 if (dn == NULL) {
1319 dout("d_alloc badness\n");
1320 err = -ENOMEM;
1321 goto out;
1322 }
Yan, Zheng86b58d12013-12-05 12:38:59 +08001323 ret = ceph_init_dentry(dn);
1324 if (ret < 0) {
Sage Weil8c696732010-07-22 14:11:56 -07001325 dput(dn);
Yan, Zheng86b58d12013-12-05 12:38:59 +08001326 err = ret;
Sage Weil355da1e2009-10-06 11:31:08 -07001327 goto out;
Sage Weil8c696732010-07-22 14:11:56 -07001328 }
Sage Weil355da1e2009-10-06 11:31:08 -07001329 } else if (dn->d_inode &&
1330 (ceph_ino(dn->d_inode) != vino.ino ||
1331 ceph_snap(dn->d_inode) != vino.snap)) {
1332 dout(" dn %p points to wrong inode %p\n",
1333 dn, dn->d_inode);
1334 d_delete(dn);
1335 dput(dn);
1336 goto retry_lookup;
1337 } else {
1338 /* reorder parent's d_subdirs */
Nick Piggin2fd6b7f2011-01-07 17:49:34 +11001339 spin_lock(&parent->d_lock);
1340 spin_lock_nested(&dn->d_lock, DENTRY_D_LOCK_NESTED);
Sage Weil355da1e2009-10-06 11:31:08 -07001341 list_move(&dn->d_u.d_child, &parent->d_subdirs);
1342 spin_unlock(&dn->d_lock);
Nick Piggin2fd6b7f2011-01-07 17:49:34 +11001343 spin_unlock(&parent->d_lock);
Sage Weil355da1e2009-10-06 11:31:08 -07001344 }
1345
Sage Weil355da1e2009-10-06 11:31:08 -07001346 /* inode */
1347 if (dn->d_inode) {
1348 in = dn->d_inode;
1349 } else {
1350 in = ceph_get_inode(parent->d_sb, vino);
Dan Carpenterac1f12e2010-08-25 09:11:35 +02001351 if (IS_ERR(in)) {
Sage Weil355da1e2009-10-06 11:31:08 -07001352 dout("new_inode badness\n");
Al Viro2744c172012-09-26 21:41:05 -04001353 d_drop(dn);
Sage Weil355da1e2009-10-06 11:31:08 -07001354 dput(dn);
Dan Carpenterac1f12e2010-08-25 09:11:35 +02001355 err = PTR_ERR(in);
Sage Weil355da1e2009-10-06 11:31:08 -07001356 goto out;
1357 }
Sage Weil355da1e2009-10-06 11:31:08 -07001358 }
1359
1360 if (fill_inode(in, &rinfo->dir_in[i], NULL, session,
1361 req->r_request_started, -1,
1362 &req->r_caps_reservation) < 0) {
1363 pr_err("fill_inode badness on %p\n", in);
Yan, Zheng86b58d12013-12-05 12:38:59 +08001364 if (!dn->d_inode)
1365 iput(in);
1366 d_drop(dn);
Sage Weild69ed052010-06-21 10:38:14 -07001367 goto next_item;
Sage Weil355da1e2009-10-06 11:31:08 -07001368 }
Yan, Zheng86b58d12013-12-05 12:38:59 +08001369
1370 if (!dn->d_inode) {
Yan, Zheng0a8a70f2014-04-14 13:13:02 +08001371 dn = splice_dentry(dn, in, NULL);
Yan, Zheng86b58d12013-12-05 12:38:59 +08001372 if (IS_ERR(dn)) {
1373 err = PTR_ERR(dn);
1374 dn = NULL;
1375 goto next_item;
1376 }
1377 }
1378
1379 di = dn->d_fsdata;
1380 di->offset = ceph_make_fpos(frag, i + r_readdir_offset);
1381
1382 update_dentry_lease(dn, rinfo->dir_dlease[i],
1383 req->r_session,
1384 req->r_request_started);
Sage Weild69ed052010-06-21 10:38:14 -07001385next_item:
1386 if (dn)
1387 dput(dn);
Sage Weil355da1e2009-10-06 11:31:08 -07001388 }
Yan, Zheng86b58d12013-12-05 12:38:59 +08001389 if (err == 0)
1390 req->r_did_prepopulate = true;
Sage Weil355da1e2009-10-06 11:31:08 -07001391
1392out:
1393 if (snapdir) {
1394 iput(snapdir);
1395 dput(parent);
1396 }
1397 dout("readdir_prepopulate done\n");
1398 return err;
1399}
1400
1401int ceph_inode_set_size(struct inode *inode, loff_t size)
1402{
1403 struct ceph_inode_info *ci = ceph_inode(inode);
1404 int ret = 0;
1405
Sage Weilbe655592011-11-30 09:47:09 -08001406 spin_lock(&ci->i_ceph_lock);
Sage Weil355da1e2009-10-06 11:31:08 -07001407 dout("set_size %p %llu -> %llu\n", inode, inode->i_size, size);
1408 inode->i_size = size;
1409 inode->i_blocks = (size + (1 << 9) - 1) >> 9;
1410
1411 /* tell the MDS if we are approaching max_size */
1412 if ((size << 1) >= ci->i_max_size &&
1413 (ci->i_reported_size << 1) < ci->i_max_size)
1414 ret = 1;
1415
Sage Weilbe655592011-11-30 09:47:09 -08001416 spin_unlock(&ci->i_ceph_lock);
Sage Weil355da1e2009-10-06 11:31:08 -07001417 return ret;
1418}
1419
1420/*
1421 * Write back inode data in a worker thread. (This can't be done
1422 * in the message handler context.)
1423 */
Sage Weil3c6f6b72010-02-09 15:24:44 -08001424void ceph_queue_writeback(struct inode *inode)
1425{
Sage Weil15a20152011-11-05 22:06:31 -07001426 ihold(inode);
Sage Weil3c6f6b72010-02-09 15:24:44 -08001427 if (queue_work(ceph_inode_to_client(inode)->wb_wq,
1428 &ceph_inode(inode)->i_wb_work)) {
Sage Weil2c27c9a2010-02-17 15:45:51 -08001429 dout("ceph_queue_writeback %p\n", inode);
Sage Weil3c6f6b72010-02-09 15:24:44 -08001430 } else {
Sage Weil2c27c9a2010-02-17 15:45:51 -08001431 dout("ceph_queue_writeback %p failed\n", inode);
Sage Weil15a20152011-11-05 22:06:31 -07001432 iput(inode);
Sage Weil3c6f6b72010-02-09 15:24:44 -08001433 }
1434}
1435
1436static void ceph_writeback_work(struct work_struct *work)
Sage Weil355da1e2009-10-06 11:31:08 -07001437{
1438 struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info,
1439 i_wb_work);
1440 struct inode *inode = &ci->vfs_inode;
1441
1442 dout("writeback %p\n", inode);
1443 filemap_fdatawrite(&inode->i_data);
1444 iput(inode);
1445}
1446
1447/*
Sage Weil3c6f6b72010-02-09 15:24:44 -08001448 * queue an async invalidation
1449 */
1450void ceph_queue_invalidate(struct inode *inode)
1451{
Sage Weil15a20152011-11-05 22:06:31 -07001452 ihold(inode);
Sage Weil3c6f6b72010-02-09 15:24:44 -08001453 if (queue_work(ceph_inode_to_client(inode)->pg_inv_wq,
1454 &ceph_inode(inode)->i_pg_inv_work)) {
1455 dout("ceph_queue_invalidate %p\n", inode);
Sage Weil3c6f6b72010-02-09 15:24:44 -08001456 } else {
1457 dout("ceph_queue_invalidate %p failed\n", inode);
Sage Weil15a20152011-11-05 22:06:31 -07001458 iput(inode);
Sage Weil3c6f6b72010-02-09 15:24:44 -08001459 }
1460}
1461
1462/*
Sage Weil355da1e2009-10-06 11:31:08 -07001463 * Invalidate inode pages in a worker thread. (This can't be done
1464 * in the message handler context.)
1465 */
Sage Weil3c6f6b72010-02-09 15:24:44 -08001466static void ceph_invalidate_work(struct work_struct *work)
Sage Weil355da1e2009-10-06 11:31:08 -07001467{
1468 struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info,
1469 i_pg_inv_work);
1470 struct inode *inode = &ci->vfs_inode;
1471 u32 orig_gen;
1472 int check = 0;
1473
Yan, Zhengb0d7c222013-08-12 21:42:15 -07001474 mutex_lock(&ci->i_truncate_mutex);
Sage Weilbe655592011-11-30 09:47:09 -08001475 spin_lock(&ci->i_ceph_lock);
Sage Weil355da1e2009-10-06 11:31:08 -07001476 dout("invalidate_pages %p gen %d revoking %d\n", inode,
1477 ci->i_rdcache_gen, ci->i_rdcache_revoking);
Sage Weilcd045cb2010-11-04 11:05:05 -07001478 if (ci->i_rdcache_revoking != ci->i_rdcache_gen) {
Yan, Zheng9563f882013-11-22 13:50:45 +08001479 if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE))
1480 check = 1;
Sage Weilbe655592011-11-30 09:47:09 -08001481 spin_unlock(&ci->i_ceph_lock);
Yan, Zhengb0d7c222013-08-12 21:42:15 -07001482 mutex_unlock(&ci->i_truncate_mutex);
Sage Weil355da1e2009-10-06 11:31:08 -07001483 goto out;
1484 }
1485 orig_gen = ci->i_rdcache_gen;
Sage Weilbe655592011-11-30 09:47:09 -08001486 spin_unlock(&ci->i_ceph_lock);
Sage Weil355da1e2009-10-06 11:31:08 -07001487
Yan, Zhengb0d7c222013-08-12 21:42:15 -07001488 truncate_inode_pages(inode->i_mapping, 0);
Sage Weil355da1e2009-10-06 11:31:08 -07001489
Sage Weilbe655592011-11-30 09:47:09 -08001490 spin_lock(&ci->i_ceph_lock);
Sage Weilcd045cb2010-11-04 11:05:05 -07001491 if (orig_gen == ci->i_rdcache_gen &&
1492 orig_gen == ci->i_rdcache_revoking) {
Sage Weil355da1e2009-10-06 11:31:08 -07001493 dout("invalidate_pages %p gen %d successful\n", inode,
1494 ci->i_rdcache_gen);
Sage Weilcd045cb2010-11-04 11:05:05 -07001495 ci->i_rdcache_revoking--;
Sage Weil355da1e2009-10-06 11:31:08 -07001496 check = 1;
1497 } else {
Sage Weilcd045cb2010-11-04 11:05:05 -07001498 dout("invalidate_pages %p gen %d raced, now %d revoking %d\n",
1499 inode, orig_gen, ci->i_rdcache_gen,
1500 ci->i_rdcache_revoking);
Yan, Zheng9563f882013-11-22 13:50:45 +08001501 if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE))
1502 check = 1;
Sage Weil355da1e2009-10-06 11:31:08 -07001503 }
Sage Weilbe655592011-11-30 09:47:09 -08001504 spin_unlock(&ci->i_ceph_lock);
Yan, Zhengb0d7c222013-08-12 21:42:15 -07001505 mutex_unlock(&ci->i_truncate_mutex);
Yan, Zheng9563f882013-11-22 13:50:45 +08001506out:
Sage Weil355da1e2009-10-06 11:31:08 -07001507 if (check)
1508 ceph_check_caps(ci, 0, NULL);
Sage Weil355da1e2009-10-06 11:31:08 -07001509 iput(inode);
1510}
1511
1512
1513/*
Yan, Zheng3f999692013-03-01 10:57:54 +08001514 * called by trunc_wq;
Sage Weil355da1e2009-10-06 11:31:08 -07001515 *
1516 * We also truncate in a separate thread as well.
1517 */
Sage Weil3c6f6b72010-02-09 15:24:44 -08001518static void ceph_vmtruncate_work(struct work_struct *work)
Sage Weil355da1e2009-10-06 11:31:08 -07001519{
1520 struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info,
1521 i_vmtruncate_work);
1522 struct inode *inode = &ci->vfs_inode;
1523
1524 dout("vmtruncate_work %p\n", inode);
Yan, Zhengb415bf42013-07-02 12:40:19 +08001525 __ceph_do_pending_vmtruncate(inode);
Sage Weil355da1e2009-10-06 11:31:08 -07001526 iput(inode);
1527}
1528
1529/*
Sage Weil3c6f6b72010-02-09 15:24:44 -08001530 * Queue an async vmtruncate. If we fail to queue work, we will handle
1531 * the truncation the next time we call __ceph_do_pending_vmtruncate.
1532 */
1533void ceph_queue_vmtruncate(struct inode *inode)
1534{
1535 struct ceph_inode_info *ci = ceph_inode(inode);
1536
Sage Weil15a20152011-11-05 22:06:31 -07001537 ihold(inode);
Milosz Tanski99ccbd22013-08-21 17:29:54 -04001538
Cheng Renquan640ef792010-03-26 17:40:33 +08001539 if (queue_work(ceph_sb_to_client(inode->i_sb)->trunc_wq,
Sage Weil3c6f6b72010-02-09 15:24:44 -08001540 &ci->i_vmtruncate_work)) {
1541 dout("ceph_queue_vmtruncate %p\n", inode);
Sage Weil3c6f6b72010-02-09 15:24:44 -08001542 } else {
1543 dout("ceph_queue_vmtruncate %p failed, pending=%d\n",
1544 inode, ci->i_truncate_pending);
Sage Weil15a20152011-11-05 22:06:31 -07001545 iput(inode);
Sage Weil3c6f6b72010-02-09 15:24:44 -08001546 }
1547}
1548
1549/*
Sage Weil355da1e2009-10-06 11:31:08 -07001550 * Make sure any pending truncation is applied before doing anything
1551 * that may depend on it.
1552 */
Yan, Zhengb415bf42013-07-02 12:40:19 +08001553void __ceph_do_pending_vmtruncate(struct inode *inode)
Sage Weil355da1e2009-10-06 11:31:08 -07001554{
1555 struct ceph_inode_info *ci = ceph_inode(inode);
1556 u64 to;
Yan, Zhenga85f50b2012-11-19 10:49:08 +08001557 int wrbuffer_refs, finish = 0;
Sage Weil355da1e2009-10-06 11:31:08 -07001558
Yan, Zhengb0d7c222013-08-12 21:42:15 -07001559 mutex_lock(&ci->i_truncate_mutex);
Sage Weil355da1e2009-10-06 11:31:08 -07001560retry:
Sage Weilbe655592011-11-30 09:47:09 -08001561 spin_lock(&ci->i_ceph_lock);
Sage Weil355da1e2009-10-06 11:31:08 -07001562 if (ci->i_truncate_pending == 0) {
1563 dout("__do_pending_vmtruncate %p none pending\n", inode);
Sage Weilbe655592011-11-30 09:47:09 -08001564 spin_unlock(&ci->i_ceph_lock);
Yan, Zhengb0d7c222013-08-12 21:42:15 -07001565 mutex_unlock(&ci->i_truncate_mutex);
Sage Weil355da1e2009-10-06 11:31:08 -07001566 return;
1567 }
1568
1569 /*
1570 * make sure any dirty snapped pages are flushed before we
1571 * possibly truncate them.. so write AND block!
1572 */
1573 if (ci->i_wrbuffer_ref_head < ci->i_wrbuffer_ref) {
1574 dout("__do_pending_vmtruncate %p flushing snaps first\n",
1575 inode);
Sage Weilbe655592011-11-30 09:47:09 -08001576 spin_unlock(&ci->i_ceph_lock);
Sage Weil355da1e2009-10-06 11:31:08 -07001577 filemap_write_and_wait_range(&inode->i_data, 0,
1578 inode->i_sb->s_maxbytes);
1579 goto retry;
1580 }
1581
Yan, Zhengb0d7c222013-08-12 21:42:15 -07001582 /* there should be no reader or writer */
1583 WARN_ON_ONCE(ci->i_rd_ref || ci->i_wr_ref);
1584
Sage Weil355da1e2009-10-06 11:31:08 -07001585 to = ci->i_truncate_size;
1586 wrbuffer_refs = ci->i_wrbuffer_ref;
1587 dout("__do_pending_vmtruncate %p (%d) to %lld\n", inode,
1588 ci->i_truncate_pending, to);
Sage Weilbe655592011-11-30 09:47:09 -08001589 spin_unlock(&ci->i_ceph_lock);
Sage Weil355da1e2009-10-06 11:31:08 -07001590
1591 truncate_inode_pages(inode->i_mapping, to);
1592
Sage Weilbe655592011-11-30 09:47:09 -08001593 spin_lock(&ci->i_ceph_lock);
Yan, Zhenga85f50b2012-11-19 10:49:08 +08001594 if (to == ci->i_truncate_size) {
1595 ci->i_truncate_pending = 0;
1596 finish = 1;
1597 }
Sage Weilbe655592011-11-30 09:47:09 -08001598 spin_unlock(&ci->i_ceph_lock);
Yan, Zhenga85f50b2012-11-19 10:49:08 +08001599 if (!finish)
1600 goto retry;
Sage Weil355da1e2009-10-06 11:31:08 -07001601
Yan, Zhengb0d7c222013-08-12 21:42:15 -07001602 mutex_unlock(&ci->i_truncate_mutex);
1603
Sage Weil355da1e2009-10-06 11:31:08 -07001604 if (wrbuffer_refs == 0)
1605 ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL);
Yan, Zhenga85f50b2012-11-19 10:49:08 +08001606
1607 wake_up_all(&ci->i_cap_wq);
Sage Weil355da1e2009-10-06 11:31:08 -07001608}
1609
Sage Weil355da1e2009-10-06 11:31:08 -07001610/*
1611 * symlinks
1612 */
1613static void *ceph_sym_follow_link(struct dentry *dentry, struct nameidata *nd)
1614{
1615 struct ceph_inode_info *ci = ceph_inode(dentry->d_inode);
1616 nd_set_link(nd, ci->i_symlink);
1617 return NULL;
1618}
1619
1620static const struct inode_operations ceph_symlink_iops = {
1621 .readlink = generic_readlink,
1622 .follow_link = ceph_sym_follow_link,
Yan, Zheng0b932672013-04-07 16:28:49 +08001623 .setattr = ceph_setattr,
1624 .getattr = ceph_getattr,
1625 .setxattr = ceph_setxattr,
1626 .getxattr = ceph_getxattr,
1627 .listxattr = ceph_listxattr,
1628 .removexattr = ceph_removexattr,
Sage Weil355da1e2009-10-06 11:31:08 -07001629};
1630
1631/*
1632 * setattr
1633 */
1634int ceph_setattr(struct dentry *dentry, struct iattr *attr)
1635{
1636 struct inode *inode = dentry->d_inode;
1637 struct ceph_inode_info *ci = ceph_inode(inode);
Sage Weil355da1e2009-10-06 11:31:08 -07001638 const unsigned int ia_valid = attr->ia_valid;
1639 struct ceph_mds_request *req;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -07001640 struct ceph_mds_client *mdsc = ceph_sb_to_client(dentry->d_sb)->mdsc;
Sage Weil355da1e2009-10-06 11:31:08 -07001641 int issued;
1642 int release = 0, dirtied = 0;
1643 int mask = 0;
1644 int err = 0;
Sage Weilfca65b42011-05-04 11:33:47 -07001645 int inode_dirty_flags = 0;
Sage Weil355da1e2009-10-06 11:31:08 -07001646
1647 if (ceph_snap(inode) != CEPH_NOSNAP)
1648 return -EROFS;
1649
Sage Weil355da1e2009-10-06 11:31:08 -07001650 err = inode_change_ok(inode, attr);
1651 if (err != 0)
1652 return err;
1653
1654 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETATTR,
1655 USE_AUTH_MDS);
1656 if (IS_ERR(req))
1657 return PTR_ERR(req);
1658
Sage Weilbe655592011-11-30 09:47:09 -08001659 spin_lock(&ci->i_ceph_lock);
Sage Weil355da1e2009-10-06 11:31:08 -07001660 issued = __ceph_caps_issued(ci, NULL);
1661 dout("setattr %p issued %s\n", inode, ceph_cap_string(issued));
1662
1663 if (ia_valid & ATTR_UID) {
1664 dout("setattr %p uid %d -> %d\n", inode,
Eric W. Biedermanbd2bae62013-01-31 04:05:39 -08001665 from_kuid(&init_user_ns, inode->i_uid),
1666 from_kuid(&init_user_ns, attr->ia_uid));
Sage Weil355da1e2009-10-06 11:31:08 -07001667 if (issued & CEPH_CAP_AUTH_EXCL) {
1668 inode->i_uid = attr->ia_uid;
1669 dirtied |= CEPH_CAP_AUTH_EXCL;
1670 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
Eric W. Biedermanab871b92013-01-31 03:40:12 -08001671 !uid_eq(attr->ia_uid, inode->i_uid)) {
1672 req->r_args.setattr.uid = cpu_to_le32(
1673 from_kuid(&init_user_ns, attr->ia_uid));
Sage Weil355da1e2009-10-06 11:31:08 -07001674 mask |= CEPH_SETATTR_UID;
1675 release |= CEPH_CAP_AUTH_SHARED;
1676 }
1677 }
1678 if (ia_valid & ATTR_GID) {
1679 dout("setattr %p gid %d -> %d\n", inode,
Eric W. Biedermanbd2bae62013-01-31 04:05:39 -08001680 from_kgid(&init_user_ns, inode->i_gid),
1681 from_kgid(&init_user_ns, attr->ia_gid));
Sage Weil355da1e2009-10-06 11:31:08 -07001682 if (issued & CEPH_CAP_AUTH_EXCL) {
1683 inode->i_gid = attr->ia_gid;
1684 dirtied |= CEPH_CAP_AUTH_EXCL;
1685 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
Eric W. Biedermanab871b92013-01-31 03:40:12 -08001686 !gid_eq(attr->ia_gid, inode->i_gid)) {
1687 req->r_args.setattr.gid = cpu_to_le32(
1688 from_kgid(&init_user_ns, attr->ia_gid));
Sage Weil355da1e2009-10-06 11:31:08 -07001689 mask |= CEPH_SETATTR_GID;
1690 release |= CEPH_CAP_AUTH_SHARED;
1691 }
1692 }
1693 if (ia_valid & ATTR_MODE) {
1694 dout("setattr %p mode 0%o -> 0%o\n", inode, inode->i_mode,
1695 attr->ia_mode);
1696 if (issued & CEPH_CAP_AUTH_EXCL) {
1697 inode->i_mode = attr->ia_mode;
1698 dirtied |= CEPH_CAP_AUTH_EXCL;
1699 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
1700 attr->ia_mode != inode->i_mode) {
Guangliang Zhao7221fe42013-11-11 15:18:03 +08001701 inode->i_mode = attr->ia_mode;
Sage Weil355da1e2009-10-06 11:31:08 -07001702 req->r_args.setattr.mode = cpu_to_le32(attr->ia_mode);
1703 mask |= CEPH_SETATTR_MODE;
1704 release |= CEPH_CAP_AUTH_SHARED;
1705 }
1706 }
1707
1708 if (ia_valid & ATTR_ATIME) {
1709 dout("setattr %p atime %ld.%ld -> %ld.%ld\n", inode,
1710 inode->i_atime.tv_sec, inode->i_atime.tv_nsec,
1711 attr->ia_atime.tv_sec, attr->ia_atime.tv_nsec);
1712 if (issued & CEPH_CAP_FILE_EXCL) {
1713 ci->i_time_warp_seq++;
1714 inode->i_atime = attr->ia_atime;
1715 dirtied |= CEPH_CAP_FILE_EXCL;
1716 } else if ((issued & CEPH_CAP_FILE_WR) &&
1717 timespec_compare(&inode->i_atime,
1718 &attr->ia_atime) < 0) {
1719 inode->i_atime = attr->ia_atime;
1720 dirtied |= CEPH_CAP_FILE_WR;
1721 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
1722 !timespec_equal(&inode->i_atime, &attr->ia_atime)) {
1723 ceph_encode_timespec(&req->r_args.setattr.atime,
1724 &attr->ia_atime);
1725 mask |= CEPH_SETATTR_ATIME;
1726 release |= CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_RD |
1727 CEPH_CAP_FILE_WR;
1728 }
1729 }
1730 if (ia_valid & ATTR_MTIME) {
1731 dout("setattr %p mtime %ld.%ld -> %ld.%ld\n", inode,
1732 inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec,
1733 attr->ia_mtime.tv_sec, attr->ia_mtime.tv_nsec);
1734 if (issued & CEPH_CAP_FILE_EXCL) {
1735 ci->i_time_warp_seq++;
1736 inode->i_mtime = attr->ia_mtime;
1737 dirtied |= CEPH_CAP_FILE_EXCL;
1738 } else if ((issued & CEPH_CAP_FILE_WR) &&
1739 timespec_compare(&inode->i_mtime,
1740 &attr->ia_mtime) < 0) {
1741 inode->i_mtime = attr->ia_mtime;
1742 dirtied |= CEPH_CAP_FILE_WR;
1743 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
1744 !timespec_equal(&inode->i_mtime, &attr->ia_mtime)) {
1745 ceph_encode_timespec(&req->r_args.setattr.mtime,
1746 &attr->ia_mtime);
1747 mask |= CEPH_SETATTR_MTIME;
1748 release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_RD |
1749 CEPH_CAP_FILE_WR;
1750 }
1751 }
1752 if (ia_valid & ATTR_SIZE) {
1753 dout("setattr %p size %lld -> %lld\n", inode,
1754 inode->i_size, attr->ia_size);
1755 if (attr->ia_size > inode->i_sb->s_maxbytes) {
1756 err = -EINVAL;
1757 goto out;
1758 }
1759 if ((issued & CEPH_CAP_FILE_EXCL) &&
1760 attr->ia_size > inode->i_size) {
1761 inode->i_size = attr->ia_size;
Sage Weil355da1e2009-10-06 11:31:08 -07001762 inode->i_blocks =
1763 (attr->ia_size + (1 << 9) - 1) >> 9;
1764 inode->i_ctime = attr->ia_ctime;
1765 ci->i_reported_size = attr->ia_size;
1766 dirtied |= CEPH_CAP_FILE_EXCL;
1767 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
1768 attr->ia_size != inode->i_size) {
1769 req->r_args.setattr.size = cpu_to_le64(attr->ia_size);
1770 req->r_args.setattr.old_size =
1771 cpu_to_le64(inode->i_size);
1772 mask |= CEPH_SETATTR_SIZE;
1773 release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_RD |
1774 CEPH_CAP_FILE_WR;
1775 }
1776 }
1777
1778 /* these do nothing */
1779 if (ia_valid & ATTR_CTIME) {
1780 bool only = (ia_valid & (ATTR_SIZE|ATTR_MTIME|ATTR_ATIME|
1781 ATTR_MODE|ATTR_UID|ATTR_GID)) == 0;
1782 dout("setattr %p ctime %ld.%ld -> %ld.%ld (%s)\n", inode,
1783 inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec,
1784 attr->ia_ctime.tv_sec, attr->ia_ctime.tv_nsec,
1785 only ? "ctime only" : "ignored");
1786 inode->i_ctime = attr->ia_ctime;
1787 if (only) {
1788 /*
1789 * if kernel wants to dirty ctime but nothing else,
1790 * we need to choose a cap to dirty under, or do
1791 * a almost-no-op setattr
1792 */
1793 if (issued & CEPH_CAP_AUTH_EXCL)
1794 dirtied |= CEPH_CAP_AUTH_EXCL;
1795 else if (issued & CEPH_CAP_FILE_EXCL)
1796 dirtied |= CEPH_CAP_FILE_EXCL;
1797 else if (issued & CEPH_CAP_XATTR_EXCL)
1798 dirtied |= CEPH_CAP_XATTR_EXCL;
1799 else
1800 mask |= CEPH_SETATTR_CTIME;
1801 }
1802 }
1803 if (ia_valid & ATTR_FILE)
1804 dout("setattr %p ATTR_FILE ... hrm!\n", inode);
1805
1806 if (dirtied) {
Sage Weilfca65b42011-05-04 11:33:47 -07001807 inode_dirty_flags = __ceph_mark_dirty_caps(ci, dirtied);
Sage Weil355da1e2009-10-06 11:31:08 -07001808 inode->i_ctime = CURRENT_TIME;
1809 }
1810
1811 release &= issued;
Sage Weilbe655592011-11-30 09:47:09 -08001812 spin_unlock(&ci->i_ceph_lock);
Sage Weil355da1e2009-10-06 11:31:08 -07001813
Sage Weilfca65b42011-05-04 11:33:47 -07001814 if (inode_dirty_flags)
1815 __mark_inode_dirty(inode, inode_dirty_flags);
1816
Guangliang Zhao7221fe42013-11-11 15:18:03 +08001817 if (ia_valid & ATTR_MODE) {
Linus Torvalds4db658e2014-01-28 18:06:18 -08001818 err = posix_acl_chmod(inode, attr->ia_mode);
Guangliang Zhao7221fe42013-11-11 15:18:03 +08001819 if (err)
1820 goto out_put;
1821 }
1822
Sage Weil355da1e2009-10-06 11:31:08 -07001823 if (mask) {
Sage Weil70b666c2011-05-27 09:24:26 -07001824 req->r_inode = inode;
1825 ihold(inode);
Sage Weil355da1e2009-10-06 11:31:08 -07001826 req->r_inode_drop = release;
1827 req->r_args.setattr.mask = cpu_to_le32(mask);
1828 req->r_num_caps = 1;
Sage Weil752c8bd2013-02-05 13:52:29 -08001829 err = ceph_mdsc_do_request(mdsc, NULL, req);
Sage Weil355da1e2009-10-06 11:31:08 -07001830 }
1831 dout("setattr %p result=%d (%s locally, %d remote)\n", inode, err,
1832 ceph_cap_string(dirtied), mask);
1833
1834 ceph_mdsc_put_request(req);
Yan, Zhengb0d7c222013-08-12 21:42:15 -07001835 if (mask & CEPH_SETATTR_SIZE)
1836 __ceph_do_pending_vmtruncate(inode);
Sage Weil355da1e2009-10-06 11:31:08 -07001837 return err;
1838out:
Sage Weilbe655592011-11-30 09:47:09 -08001839 spin_unlock(&ci->i_ceph_lock);
Guangliang Zhao7221fe42013-11-11 15:18:03 +08001840out_put:
Sage Weil355da1e2009-10-06 11:31:08 -07001841 ceph_mdsc_put_request(req);
1842 return err;
1843}
1844
1845/*
1846 * Verify that we have a lease on the given mask. If not,
1847 * do a getattr against an mds.
1848 */
1849int ceph_do_getattr(struct inode *inode, int mask)
1850{
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -07001851 struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb);
1852 struct ceph_mds_client *mdsc = fsc->mdsc;
Sage Weil355da1e2009-10-06 11:31:08 -07001853 struct ceph_mds_request *req;
1854 int err;
1855
1856 if (ceph_snap(inode) == CEPH_SNAPDIR) {
1857 dout("do_getattr inode %p SNAPDIR\n", inode);
1858 return 0;
1859 }
1860
Sage Weilb7495fc2010-11-09 12:43:12 -08001861 dout("do_getattr inode %p mask %s mode 0%o\n", inode, ceph_cap_string(mask), inode->i_mode);
Sage Weil355da1e2009-10-06 11:31:08 -07001862 if (ceph_caps_issued_mask(ceph_inode(inode), mask, 1))
1863 return 0;
1864
1865 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS);
1866 if (IS_ERR(req))
1867 return PTR_ERR(req);
Sage Weil70b666c2011-05-27 09:24:26 -07001868 req->r_inode = inode;
1869 ihold(inode);
Sage Weil355da1e2009-10-06 11:31:08 -07001870 req->r_num_caps = 1;
1871 req->r_args.getattr.mask = cpu_to_le32(mask);
1872 err = ceph_mdsc_do_request(mdsc, NULL, req);
1873 ceph_mdsc_put_request(req);
1874 dout("do_getattr result=%d\n", err);
1875 return err;
1876}
1877
1878
1879/*
1880 * Check inode permissions. We verify we have a valid value for
1881 * the AUTH cap, then call the generic handler.
1882 */
Al Viro10556cb2011-06-20 19:28:19 -04001883int ceph_permission(struct inode *inode, int mask)
Sage Weil355da1e2009-10-06 11:31:08 -07001884{
Nick Pigginb74c79e2011-01-07 17:49:58 +11001885 int err;
1886
Al Viro10556cb2011-06-20 19:28:19 -04001887 if (mask & MAY_NOT_BLOCK)
Nick Pigginb74c79e2011-01-07 17:49:58 +11001888 return -ECHILD;
1889
1890 err = ceph_do_getattr(inode, CEPH_CAP_AUTH_SHARED);
Sage Weil355da1e2009-10-06 11:31:08 -07001891
1892 if (!err)
Al Viro2830ba72011-06-20 19:16:29 -04001893 err = generic_permission(inode, mask);
Sage Weil355da1e2009-10-06 11:31:08 -07001894 return err;
1895}
1896
1897/*
1898 * Get all attributes. Hopefully somedata we'll have a statlite()
1899 * and can limit the fields we require to be accurate.
1900 */
1901int ceph_getattr(struct vfsmount *mnt, struct dentry *dentry,
1902 struct kstat *stat)
1903{
1904 struct inode *inode = dentry->d_inode;
Sage Weil232d4b02009-10-21 11:21:49 -07001905 struct ceph_inode_info *ci = ceph_inode(inode);
Sage Weil355da1e2009-10-06 11:31:08 -07001906 int err;
1907
1908 err = ceph_do_getattr(inode, CEPH_STAT_CAP_INODE_ALL);
1909 if (!err) {
1910 generic_fillattr(inode, stat);
Yehuda Sadehad1fee92011-01-21 16:44:03 -08001911 stat->ino = ceph_translate_ino(inode->i_sb, inode->i_ino);
Sage Weil355da1e2009-10-06 11:31:08 -07001912 if (ceph_snap(inode) != CEPH_NOSNAP)
1913 stat->dev = ceph_snap(inode);
1914 else
1915 stat->dev = 0;
Sage Weil232d4b02009-10-21 11:21:49 -07001916 if (S_ISDIR(inode->i_mode)) {
Yehuda Sadeh1c1266b2011-01-12 16:53:27 -08001917 if (ceph_test_mount_opt(ceph_sb_to_client(inode->i_sb),
1918 RBYTES))
1919 stat->size = ci->i_rbytes;
1920 else
1921 stat->size = ci->i_files + ci->i_subdirs;
Sage Weil232d4b02009-10-21 11:21:49 -07001922 stat->blocks = 0;
Sage Weil355da1e2009-10-06 11:31:08 -07001923 stat->blksize = 65536;
Sage Weil232d4b02009-10-21 11:21:49 -07001924 }
Sage Weil355da1e2009-10-06 11:31:08 -07001925 }
1926 return err;
1927}