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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>
Yehuda Sadehc9af9fb2010-02-19 00:10:11 +000012#include <linux/pagevec.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"
16#include <linux/ceph/decode.h>
Sage Weil355da1e2009-10-06 11:31:08 -070017
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))
Julia Lawall7e34bc52010-05-22 12:01:14 +020072 return inode;
Sage Weil355da1e2009-10-06 11:31:08 -070073 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
Sage Weil6c0f3af2010-11-16 11:14:34 -0800300 memset(&ci->i_dir_layout, 0, sizeof(ci->i_dir_layout));
301
Sage Weil355da1e2009-10-06 11:31:08 -0700302 ci->i_fragtree = RB_ROOT;
303 mutex_init(&ci->i_fragtree_mutex);
304
305 ci->i_xattrs.blob = NULL;
306 ci->i_xattrs.prealloc_blob = NULL;
307 ci->i_xattrs.dirty = false;
308 ci->i_xattrs.index = RB_ROOT;
309 ci->i_xattrs.count = 0;
310 ci->i_xattrs.names_size = 0;
311 ci->i_xattrs.vals_size = 0;
312 ci->i_xattrs.version = 0;
313 ci->i_xattrs.index_version = 0;
314
315 ci->i_caps = RB_ROOT;
316 ci->i_auth_cap = NULL;
317 ci->i_dirty_caps = 0;
318 ci->i_flushing_caps = 0;
319 INIT_LIST_HEAD(&ci->i_dirty_item);
320 INIT_LIST_HEAD(&ci->i_flushing_item);
321 ci->i_cap_flush_seq = 0;
322 ci->i_cap_flush_last_tid = 0;
323 memset(&ci->i_cap_flush_tid, 0, sizeof(ci->i_cap_flush_tid));
324 init_waitqueue_head(&ci->i_cap_wq);
325 ci->i_hold_caps_min = 0;
326 ci->i_hold_caps_max = 0;
327 INIT_LIST_HEAD(&ci->i_cap_delay_list);
328 ci->i_cap_exporting_mds = 0;
329 ci->i_cap_exporting_mseq = 0;
330 ci->i_cap_exporting_issued = 0;
331 INIT_LIST_HEAD(&ci->i_cap_snaps);
332 ci->i_head_snapc = NULL;
333 ci->i_snap_caps = 0;
334
335 for (i = 0; i < CEPH_FILE_MODE_NUM; i++)
336 ci->i_nr_by_mode[i] = 0;
337
338 ci->i_truncate_seq = 0;
339 ci->i_truncate_size = 0;
340 ci->i_truncate_pending = 0;
341
342 ci->i_max_size = 0;
343 ci->i_reported_size = 0;
344 ci->i_wanted_max_size = 0;
345 ci->i_requested_max_size = 0;
346
347 ci->i_pin_ref = 0;
348 ci->i_rd_ref = 0;
349 ci->i_rdcache_ref = 0;
350 ci->i_wr_ref = 0;
351 ci->i_wrbuffer_ref = 0;
352 ci->i_wrbuffer_ref_head = 0;
353 ci->i_shared_gen = 0;
354 ci->i_rdcache_gen = 0;
355 ci->i_rdcache_revoking = 0;
356
357 INIT_LIST_HEAD(&ci->i_unsafe_writes);
358 INIT_LIST_HEAD(&ci->i_unsafe_dirops);
359 spin_lock_init(&ci->i_unsafe_lock);
360
361 ci->i_snap_realm = NULL;
362 INIT_LIST_HEAD(&ci->i_snap_realm_item);
363 INIT_LIST_HEAD(&ci->i_snap_flush_item);
364
Sage Weil3c6f6b72010-02-09 15:24:44 -0800365 INIT_WORK(&ci->i_wb_work, ceph_writeback_work);
366 INIT_WORK(&ci->i_pg_inv_work, ceph_invalidate_work);
Sage Weil355da1e2009-10-06 11:31:08 -0700367
368 INIT_WORK(&ci->i_vmtruncate_work, ceph_vmtruncate_work);
369
370 return &ci->vfs_inode;
371}
372
373void ceph_destroy_inode(struct inode *inode)
374{
375 struct ceph_inode_info *ci = ceph_inode(inode);
376 struct ceph_inode_frag *frag;
377 struct rb_node *n;
378
379 dout("destroy_inode %p ino %llx.%llx\n", inode, ceph_vinop(inode));
380
381 ceph_queue_caps_release(inode);
382
Sage Weil8b218b82010-03-09 12:59:08 -0800383 /*
384 * we may still have a snap_realm reference if there are stray
385 * caps in i_cap_exporting_issued or i_snap_caps.
386 */
387 if (ci->i_snap_realm) {
388 struct ceph_mds_client *mdsc =
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700389 ceph_sb_to_client(ci->vfs_inode.i_sb)->mdsc;
Sage Weil8b218b82010-03-09 12:59:08 -0800390 struct ceph_snap_realm *realm = ci->i_snap_realm;
391
392 dout(" dropping residual ref to snap realm %p\n", realm);
393 spin_lock(&realm->inodes_with_caps_lock);
394 list_del_init(&ci->i_snap_realm_item);
395 spin_unlock(&realm->inodes_with_caps_lock);
396 ceph_put_snap_realm(mdsc, realm);
397 }
398
Sage Weil355da1e2009-10-06 11:31:08 -0700399 kfree(ci->i_symlink);
400 while ((n = rb_first(&ci->i_fragtree)) != NULL) {
401 frag = rb_entry(n, struct ceph_inode_frag, node);
402 rb_erase(n, &ci->i_fragtree);
403 kfree(frag);
404 }
405
406 __ceph_destroy_xattrs(ci);
Sage Weilb6c1d5b2009-12-07 12:17:17 -0800407 if (ci->i_xattrs.blob)
408 ceph_buffer_put(ci->i_xattrs.blob);
409 if (ci->i_xattrs.prealloc_blob)
410 ceph_buffer_put(ci->i_xattrs.prealloc_blob);
Sage Weil355da1e2009-10-06 11:31:08 -0700411
412 kmem_cache_free(ceph_inode_cachep, ci);
413}
414
415
416/*
417 * Helpers to fill in size, ctime, mtime, and atime. We have to be
418 * careful because either the client or MDS may have more up to date
419 * info, depending on which capabilities are held, and whether
420 * time_warp_seq or truncate_seq have increased. (Ordinarily, mtime
421 * and size are monotonically increasing, except when utimes() or
422 * truncate() increments the corresponding _seq values.)
423 */
424int ceph_fill_file_size(struct inode *inode, int issued,
425 u32 truncate_seq, u64 truncate_size, u64 size)
426{
427 struct ceph_inode_info *ci = ceph_inode(inode);
428 int queue_trunc = 0;
429
430 if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) > 0 ||
431 (truncate_seq == ci->i_truncate_seq && size > inode->i_size)) {
432 dout("size %lld -> %llu\n", inode->i_size, size);
433 inode->i_size = size;
434 inode->i_blocks = (size + (1<<9) - 1) >> 9;
435 ci->i_reported_size = size;
436 if (truncate_seq != ci->i_truncate_seq) {
437 dout("truncate_seq %u -> %u\n",
438 ci->i_truncate_seq, truncate_seq);
439 ci->i_truncate_seq = truncate_seq;
Yehuda Sadeh3d497d82010-02-09 11:08:40 -0800440 /*
441 * If we hold relevant caps, or in the case where we're
442 * not the only client referencing this file and we
443 * don't hold those caps, then we need to check whether
444 * the file is either opened or mmaped
445 */
446 if ((issued & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_RD|
Sage Weil29625072010-05-27 10:40:43 -0700447 CEPH_CAP_FILE_WR|CEPH_CAP_FILE_BUFFER|
448 CEPH_CAP_FILE_EXCL|
449 CEPH_CAP_FILE_LAZYIO)) ||
Yehuda Sadeh3d497d82010-02-09 11:08:40 -0800450 mapping_mapped(inode->i_mapping) ||
451 __ceph_caps_file_wanted(ci)) {
Sage Weil355da1e2009-10-06 11:31:08 -0700452 ci->i_truncate_pending++;
453 queue_trunc = 1;
454 }
455 }
456 }
457 if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) >= 0 &&
458 ci->i_truncate_size != truncate_size) {
459 dout("truncate_size %lld -> %llu\n", ci->i_truncate_size,
460 truncate_size);
461 ci->i_truncate_size = truncate_size;
462 }
463 return queue_trunc;
464}
465
466void ceph_fill_file_time(struct inode *inode, int issued,
467 u64 time_warp_seq, struct timespec *ctime,
468 struct timespec *mtime, struct timespec *atime)
469{
470 struct ceph_inode_info *ci = ceph_inode(inode);
471 int warn = 0;
472
473 if (issued & (CEPH_CAP_FILE_EXCL|
474 CEPH_CAP_FILE_WR|
Sage Weild8672d62010-11-08 09:24:34 -0800475 CEPH_CAP_FILE_BUFFER|
476 CEPH_CAP_AUTH_EXCL|
477 CEPH_CAP_XATTR_EXCL)) {
Sage Weil355da1e2009-10-06 11:31:08 -0700478 if (timespec_compare(ctime, &inode->i_ctime) > 0) {
479 dout("ctime %ld.%09ld -> %ld.%09ld inc w/ cap\n",
480 inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec,
481 ctime->tv_sec, ctime->tv_nsec);
482 inode->i_ctime = *ctime;
483 }
484 if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) > 0) {
485 /* the MDS did a utimes() */
486 dout("mtime %ld.%09ld -> %ld.%09ld "
487 "tw %d -> %d\n",
488 inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec,
489 mtime->tv_sec, mtime->tv_nsec,
490 ci->i_time_warp_seq, (int)time_warp_seq);
491
492 inode->i_mtime = *mtime;
493 inode->i_atime = *atime;
494 ci->i_time_warp_seq = time_warp_seq;
495 } else if (time_warp_seq == ci->i_time_warp_seq) {
496 /* nobody did utimes(); take the max */
497 if (timespec_compare(mtime, &inode->i_mtime) > 0) {
498 dout("mtime %ld.%09ld -> %ld.%09ld inc\n",
499 inode->i_mtime.tv_sec,
500 inode->i_mtime.tv_nsec,
501 mtime->tv_sec, mtime->tv_nsec);
502 inode->i_mtime = *mtime;
503 }
504 if (timespec_compare(atime, &inode->i_atime) > 0) {
505 dout("atime %ld.%09ld -> %ld.%09ld inc\n",
506 inode->i_atime.tv_sec,
507 inode->i_atime.tv_nsec,
508 atime->tv_sec, atime->tv_nsec);
509 inode->i_atime = *atime;
510 }
511 } else if (issued & CEPH_CAP_FILE_EXCL) {
512 /* we did a utimes(); ignore mds values */
513 } else {
514 warn = 1;
515 }
516 } else {
Sage Weild8672d62010-11-08 09:24:34 -0800517 /* we have no write|excl caps; whatever the MDS says is true */
Sage Weil355da1e2009-10-06 11:31:08 -0700518 if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) >= 0) {
519 inode->i_ctime = *ctime;
520 inode->i_mtime = *mtime;
521 inode->i_atime = *atime;
522 ci->i_time_warp_seq = time_warp_seq;
523 } else {
524 warn = 1;
525 }
526 }
527 if (warn) /* time_warp_seq shouldn't go backwards */
528 dout("%p mds time_warp_seq %llu < %u\n",
529 inode, time_warp_seq, ci->i_time_warp_seq);
530}
531
532/*
533 * Populate an inode based on info from mds. May be called on new or
534 * existing inodes.
535 */
536static int fill_inode(struct inode *inode,
537 struct ceph_mds_reply_info_in *iinfo,
538 struct ceph_mds_reply_dirfrag *dirinfo,
539 struct ceph_mds_session *session,
540 unsigned long ttl_from, int cap_fmode,
541 struct ceph_cap_reservation *caps_reservation)
542{
543 struct ceph_mds_reply_inode *info = iinfo->in;
544 struct ceph_inode_info *ci = ceph_inode(inode);
545 int i;
546 int issued, implemented;
547 struct timespec mtime, atime, ctime;
548 u32 nsplits;
549 struct ceph_buffer *xattr_blob = NULL;
550 int err = 0;
551 int queue_trunc = 0;
552
553 dout("fill_inode %p ino %llx.%llx v %llu had %llu\n",
554 inode, ceph_vinop(inode), le64_to_cpu(info->version),
555 ci->i_version);
556
557 /*
558 * prealloc xattr data, if it looks like we'll need it. only
559 * if len > 4 (meaning there are actually xattrs; the first 4
560 * bytes are the xattr count).
561 */
562 if (iinfo->xattr_len > 4) {
Sage Weilb6c1d5b2009-12-07 12:17:17 -0800563 xattr_blob = ceph_buffer_new(iinfo->xattr_len, GFP_NOFS);
Sage Weil355da1e2009-10-06 11:31:08 -0700564 if (!xattr_blob)
565 pr_err("fill_inode ENOMEM xattr blob %d bytes\n",
566 iinfo->xattr_len);
567 }
568
569 spin_lock(&inode->i_lock);
570
571 /*
572 * provided version will be odd if inode value is projected,
Sage Weil8bd59e02010-11-08 09:23:12 -0800573 * even if stable. skip the update if we have newer stable
574 * info (ours>=theirs, e.g. due to racing mds replies), unless
575 * we are getting projected (unstable) info (in which case the
576 * version is odd, and we want ours>theirs).
577 * us them
578 * 2 2 skip
579 * 3 2 skip
580 * 3 3 update
Sage Weil355da1e2009-10-06 11:31:08 -0700581 */
582 if (le64_to_cpu(info->version) > 0 &&
Sage Weil8bd59e02010-11-08 09:23:12 -0800583 (ci->i_version & ~1) >= le64_to_cpu(info->version))
Sage Weil355da1e2009-10-06 11:31:08 -0700584 goto no_change;
585
586 issued = __ceph_caps_issued(ci, &implemented);
587 issued |= implemented | __ceph_caps_dirty(ci);
588
589 /* update inode */
590 ci->i_version = le64_to_cpu(info->version);
591 inode->i_version++;
592 inode->i_rdev = le32_to_cpu(info->rdev);
593
594 if ((issued & CEPH_CAP_AUTH_EXCL) == 0) {
595 inode->i_mode = le32_to_cpu(info->mode);
596 inode->i_uid = le32_to_cpu(info->uid);
597 inode->i_gid = le32_to_cpu(info->gid);
598 dout("%p mode 0%o uid.gid %d.%d\n", inode, inode->i_mode,
599 inode->i_uid, inode->i_gid);
600 }
601
602 if ((issued & CEPH_CAP_LINK_EXCL) == 0)
603 inode->i_nlink = le32_to_cpu(info->nlink);
604
605 /* be careful with mtime, atime, size */
606 ceph_decode_timespec(&atime, &info->atime);
607 ceph_decode_timespec(&mtime, &info->mtime);
608 ceph_decode_timespec(&ctime, &info->ctime);
609 queue_trunc = ceph_fill_file_size(inode, issued,
610 le32_to_cpu(info->truncate_seq),
611 le64_to_cpu(info->truncate_size),
Sage Weil355da1e2009-10-06 11:31:08 -0700612 le64_to_cpu(info->size));
613 ceph_fill_file_time(inode, issued,
614 le32_to_cpu(info->time_warp_seq),
615 &ctime, &mtime, &atime);
616
Sage Weil912a9b02010-11-07 09:37:25 -0800617 /* only update max_size on auth cap */
618 if ((info->cap.flags & CEPH_CAP_FLAG_AUTH) &&
619 ci->i_max_size != le64_to_cpu(info->max_size)) {
620 dout("max_size %lld -> %llu\n", ci->i_max_size,
621 le64_to_cpu(info->max_size));
622 ci->i_max_size = le64_to_cpu(info->max_size);
623 }
624
Sage Weil355da1e2009-10-06 11:31:08 -0700625 ci->i_layout = info->layout;
626 inode->i_blkbits = fls(le32_to_cpu(info->layout.fl_stripe_unit)) - 1;
627
628 /* xattrs */
629 /* note that if i_xattrs.len <= 4, i_xattrs.data will still be NULL. */
630 if ((issued & CEPH_CAP_XATTR_EXCL) == 0 &&
631 le64_to_cpu(info->xattr_version) > ci->i_xattrs.version) {
632 if (ci->i_xattrs.blob)
633 ceph_buffer_put(ci->i_xattrs.blob);
634 ci->i_xattrs.blob = xattr_blob;
635 if (xattr_blob)
636 memcpy(ci->i_xattrs.blob->vec.iov_base,
637 iinfo->xattr_data, iinfo->xattr_len);
638 ci->i_xattrs.version = le64_to_cpu(info->xattr_version);
Sage Weila6424e42010-04-29 09:28:11 -0700639 xattr_blob = NULL;
Sage Weil355da1e2009-10-06 11:31:08 -0700640 }
641
642 inode->i_mapping->a_ops = &ceph_aops;
643 inode->i_mapping->backing_dev_info =
Cheng Renquan640ef792010-03-26 17:40:33 +0800644 &ceph_sb_to_client(inode->i_sb)->backing_dev_info;
Sage Weil355da1e2009-10-06 11:31:08 -0700645
646 switch (inode->i_mode & S_IFMT) {
647 case S_IFIFO:
648 case S_IFBLK:
649 case S_IFCHR:
650 case S_IFSOCK:
651 init_special_inode(inode, inode->i_mode, inode->i_rdev);
652 inode->i_op = &ceph_file_iops;
653 break;
654 case S_IFREG:
655 inode->i_op = &ceph_file_iops;
656 inode->i_fop = &ceph_file_fops;
657 break;
658 case S_IFLNK:
659 inode->i_op = &ceph_symlink_iops;
660 if (!ci->i_symlink) {
661 int symlen = iinfo->symlink_len;
662 char *sym;
663
664 BUG_ON(symlen != inode->i_size);
665 spin_unlock(&inode->i_lock);
666
667 err = -ENOMEM;
668 sym = kmalloc(symlen+1, GFP_NOFS);
669 if (!sym)
670 goto out;
671 memcpy(sym, iinfo->symlink, symlen);
672 sym[symlen] = 0;
673
674 spin_lock(&inode->i_lock);
675 if (!ci->i_symlink)
676 ci->i_symlink = sym;
677 else
678 kfree(sym); /* lost a race */
679 }
680 break;
681 case S_IFDIR:
682 inode->i_op = &ceph_dir_iops;
683 inode->i_fop = &ceph_dir_fops;
684
685 ci->i_files = le64_to_cpu(info->files);
686 ci->i_subdirs = le64_to_cpu(info->subdirs);
687 ci->i_rbytes = le64_to_cpu(info->rbytes);
688 ci->i_rfiles = le64_to_cpu(info->rfiles);
689 ci->i_rsubdirs = le64_to_cpu(info->rsubdirs);
690 ceph_decode_timespec(&ci->i_rctime, &info->rctime);
691
692 /* set dir completion flag? */
693 if (ci->i_files == 0 && ci->i_subdirs == 0 &&
694 ceph_snap(inode) == CEPH_NOSNAP &&
Sage Weil1b7facc2010-04-16 12:58:02 -0700695 (le32_to_cpu(info->cap.caps) & CEPH_CAP_FILE_SHARED) &&
Sage Weil12451492010-08-22 21:33:32 -0700696 (issued & CEPH_CAP_FILE_EXCL) == 0 &&
Sage Weil1b7facc2010-04-16 12:58:02 -0700697 (ci->i_ceph_flags & CEPH_I_COMPLETE) == 0) {
Sage Weil355da1e2009-10-06 11:31:08 -0700698 dout(" marking %p complete (empty)\n", inode);
699 ci->i_ceph_flags |= CEPH_I_COMPLETE;
700 ci->i_max_offset = 2;
701 }
702
703 /* it may be better to set st_size in getattr instead? */
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700704 if (ceph_test_mount_opt(ceph_sb_to_client(inode->i_sb), RBYTES))
Sage Weil355da1e2009-10-06 11:31:08 -0700705 inode->i_size = ci->i_rbytes;
706 break;
707 default:
708 pr_err("fill_inode %llx.%llx BAD mode 0%o\n",
709 ceph_vinop(inode), inode->i_mode);
710 }
711
712no_change:
713 spin_unlock(&inode->i_lock);
714
715 /* queue truncate if we saw i_size decrease */
716 if (queue_trunc)
Sage Weil3c6f6b72010-02-09 15:24:44 -0800717 ceph_queue_vmtruncate(inode);
Sage Weil355da1e2009-10-06 11:31:08 -0700718
719 /* populate frag tree */
720 /* FIXME: move me up, if/when version reflects fragtree changes */
721 nsplits = le32_to_cpu(info->fragtree.nsplits);
722 mutex_lock(&ci->i_fragtree_mutex);
723 for (i = 0; i < nsplits; i++) {
724 u32 id = le32_to_cpu(info->fragtree.splits[i].frag);
725 struct ceph_inode_frag *frag = __get_or_create_frag(ci, id);
726
727 if (IS_ERR(frag))
728 continue;
729 frag->split_by = le32_to_cpu(info->fragtree.splits[i].by);
730 dout(" frag %x split by %d\n", frag->frag, frag->split_by);
731 }
732 mutex_unlock(&ci->i_fragtree_mutex);
733
734 /* were we issued a capability? */
735 if (info->cap.caps) {
736 if (ceph_snap(inode) == CEPH_NOSNAP) {
737 ceph_add_cap(inode, session,
738 le64_to_cpu(info->cap.cap_id),
739 cap_fmode,
740 le32_to_cpu(info->cap.caps),
741 le32_to_cpu(info->cap.wanted),
742 le32_to_cpu(info->cap.seq),
743 le32_to_cpu(info->cap.mseq),
744 le64_to_cpu(info->cap.realm),
745 info->cap.flags,
746 caps_reservation);
747 } else {
748 spin_lock(&inode->i_lock);
749 dout(" %p got snap_caps %s\n", inode,
750 ceph_cap_string(le32_to_cpu(info->cap.caps)));
751 ci->i_snap_caps |= le32_to_cpu(info->cap.caps);
752 if (cap_fmode >= 0)
753 __ceph_get_fmode(ci, cap_fmode);
754 spin_unlock(&inode->i_lock);
755 }
Sage Weil04d000e2010-05-07 11:26:34 -0700756 } else if (cap_fmode >= 0) {
757 pr_warning("mds issued no caps on %llx.%llx\n",
758 ceph_vinop(inode));
759 __ceph_get_fmode(ci, cap_fmode);
Sage Weil355da1e2009-10-06 11:31:08 -0700760 }
761
762 /* update delegation info? */
763 if (dirinfo)
764 ceph_fill_dirfrag(inode, dirinfo);
765
766 err = 0;
767
768out:
Sage Weilb6c1d5b2009-12-07 12:17:17 -0800769 if (xattr_blob)
770 ceph_buffer_put(xattr_blob);
Sage Weil355da1e2009-10-06 11:31:08 -0700771 return err;
772}
773
774/*
775 * caller should hold session s_mutex.
776 */
777static void update_dentry_lease(struct dentry *dentry,
778 struct ceph_mds_reply_lease *lease,
779 struct ceph_mds_session *session,
780 unsigned long from_time)
781{
782 struct ceph_dentry_info *di = ceph_dentry(dentry);
783 long unsigned duration = le32_to_cpu(lease->duration_ms);
784 long unsigned ttl = from_time + (duration * HZ) / 1000;
785 long unsigned half_ttl = from_time + (duration * HZ / 2) / 1000;
786 struct inode *dir;
787
788 /* only track leases on regular dentries */
789 if (dentry->d_op != &ceph_dentry_ops)
790 return;
791
792 spin_lock(&dentry->d_lock);
793 dout("update_dentry_lease %p mask %d duration %lu ms ttl %lu\n",
794 dentry, le16_to_cpu(lease->mask), duration, ttl);
795
796 /* make lease_rdcache_gen match directory */
797 dir = dentry->d_parent->d_inode;
798 di->lease_shared_gen = ceph_inode(dir)->i_shared_gen;
799
800 if (lease->mask == 0)
801 goto out_unlock;
802
803 if (di->lease_gen == session->s_cap_gen &&
804 time_before(ttl, dentry->d_time))
805 goto out_unlock; /* we already have a newer lease. */
806
807 if (di->lease_session && di->lease_session != session)
808 goto out_unlock;
809
810 ceph_dentry_lru_touch(dentry);
811
812 if (!di->lease_session)
813 di->lease_session = ceph_get_mds_session(session);
814 di->lease_gen = session->s_cap_gen;
815 di->lease_seq = le32_to_cpu(lease->seq);
816 di->lease_renew_after = half_ttl;
817 di->lease_renew_from = 0;
818 dentry->d_time = ttl;
819out_unlock:
820 spin_unlock(&dentry->d_lock);
821 return;
822}
823
824/*
Yehuda Sadeh4baa75e2010-01-07 15:36:32 -0800825 * Set dentry's directory position based on the current dir's max, and
826 * order it in d_subdirs, so that dcache_readdir behaves.
827 */
828static void ceph_set_dentry_offset(struct dentry *dn)
829{
830 struct dentry *dir = dn->d_parent;
831 struct inode *inode = dn->d_parent->d_inode;
832 struct ceph_dentry_info *di;
833
834 BUG_ON(!inode);
835
836 di = ceph_dentry(dn);
837
838 spin_lock(&inode->i_lock);
Sage Weile8a74982010-04-15 14:08:49 -0700839 if ((ceph_inode(inode)->i_ceph_flags & CEPH_I_COMPLETE) == 0) {
840 spin_unlock(&inode->i_lock);
841 return;
842 }
Yehuda Sadeh4baa75e2010-01-07 15:36:32 -0800843 di->offset = ceph_inode(inode)->i_max_offset++;
844 spin_unlock(&inode->i_lock);
845
846 spin_lock(&dcache_lock);
847 spin_lock(&dn->d_lock);
Henry C Chang13a42142010-06-01 11:31:08 -0700848 list_move(&dn->d_u.d_child, &dir->d_subdirs);
Yehuda Sadeh4baa75e2010-01-07 15:36:32 -0800849 dout("set_dentry_offset %p %lld (%p %p)\n", dn, di->offset,
850 dn->d_u.d_child.prev, dn->d_u.d_child.next);
851 spin_unlock(&dn->d_lock);
852 spin_unlock(&dcache_lock);
853}
854
855/*
Sage Weil1cd39352010-05-03 22:08:02 -0700856 * splice a dentry to an inode.
857 * caller must hold directory i_mutex for this to be safe.
858 *
859 * we will only rehash the resulting dentry if @prehash is
860 * true; @prehash will be set to false (for the benefit of
861 * the caller) if we fail.
862 */
863static struct dentry *splice_dentry(struct dentry *dn, struct inode *in,
Sage Weil467c5252010-09-13 11:39:20 -0700864 bool *prehash, bool set_offset)
Sage Weil1cd39352010-05-03 22:08:02 -0700865{
866 struct dentry *realdn;
867
868 BUG_ON(dn->d_inode);
869
870 /* dn must be unhashed */
871 if (!d_unhashed(dn))
872 d_drop(dn);
873 realdn = d_materialise_unique(dn, in);
874 if (IS_ERR(realdn)) {
Sage Weild69ed052010-06-21 10:38:14 -0700875 pr_err("splice_dentry error %ld %p inode %p ino %llx.%llx\n",
876 PTR_ERR(realdn), dn, in, ceph_vinop(in));
Sage Weil1cd39352010-05-03 22:08:02 -0700877 if (prehash)
878 *prehash = false; /* don't rehash on error */
879 dn = realdn; /* note realdn contains the error */
880 goto out;
881 } else if (realdn) {
882 dout("dn %p (%d) spliced with %p (%d) "
883 "inode %p ino %llx.%llx\n",
884 dn, atomic_read(&dn->d_count),
885 realdn, atomic_read(&realdn->d_count),
886 realdn->d_inode, ceph_vinop(realdn->d_inode));
887 dput(dn);
888 dn = realdn;
889 } else {
890 BUG_ON(!ceph_dentry(dn));
891 dout("dn %p attached to %p ino %llx.%llx\n",
892 dn, dn->d_inode, ceph_vinop(dn->d_inode));
893 }
894 if ((!prehash || *prehash) && d_unhashed(dn))
895 d_rehash(dn);
Sage Weil467c5252010-09-13 11:39:20 -0700896 if (set_offset)
897 ceph_set_dentry_offset(dn);
Sage Weil1cd39352010-05-03 22:08:02 -0700898out:
899 return dn;
900}
901
902/*
Sage Weil355da1e2009-10-06 11:31:08 -0700903 * Incorporate results into the local cache. This is either just
904 * one inode, or a directory, dentry, and possibly linked-to inode (e.g.,
905 * after a lookup).
906 *
907 * A reply may contain
908 * a directory inode along with a dentry.
909 * and/or a target inode
910 *
911 * Called with snap_rwsem (read).
912 */
913int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req,
914 struct ceph_mds_session *session)
915{
916 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
917 struct inode *in = NULL;
918 struct ceph_mds_reply_inode *ininfo;
919 struct ceph_vino vino;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700920 struct ceph_fs_client *fsc = ceph_sb_to_client(sb);
Sage Weil355da1e2009-10-06 11:31:08 -0700921 int i = 0;
922 int err = 0;
923
924 dout("fill_trace %p is_dentry %d is_target %d\n", req,
925 rinfo->head->is_dentry, rinfo->head->is_target);
926
927#if 0
928 /*
929 * Debugging hook:
930 *
931 * If we resend completed ops to a recovering mds, we get no
932 * trace. Since that is very rare, pretend this is the case
933 * to ensure the 'no trace' handlers in the callers behave.
934 *
935 * Fill in inodes unconditionally to avoid breaking cap
936 * invariants.
937 */
938 if (rinfo->head->op & CEPH_MDS_OP_WRITE) {
939 pr_info("fill_trace faking empty trace on %lld %s\n",
940 req->r_tid, ceph_mds_op_name(rinfo->head->op));
941 if (rinfo->head->is_dentry) {
942 rinfo->head->is_dentry = 0;
943 err = fill_inode(req->r_locked_dir,
944 &rinfo->diri, rinfo->dirfrag,
945 session, req->r_request_started, -1);
946 }
947 if (rinfo->head->is_target) {
948 rinfo->head->is_target = 0;
949 ininfo = rinfo->targeti.in;
950 vino.ino = le64_to_cpu(ininfo->ino);
951 vino.snap = le64_to_cpu(ininfo->snapid);
952 in = ceph_get_inode(sb, vino);
953 err = fill_inode(in, &rinfo->targeti, NULL,
954 session, req->r_request_started,
955 req->r_fmode);
956 iput(in);
957 }
958 }
959#endif
960
961 if (!rinfo->head->is_target && !rinfo->head->is_dentry) {
962 dout("fill_trace reply is empty!\n");
Sage Weil167c9e32010-05-14 10:02:57 -0700963 if (rinfo->head->result == 0 && req->r_locked_dir)
964 ceph_invalidate_dir_request(req);
Sage Weil355da1e2009-10-06 11:31:08 -0700965 return 0;
966 }
967
968 if (rinfo->head->is_dentry) {
Sage Weil5b1daec2010-01-25 11:33:08 -0800969 struct inode *dir = req->r_locked_dir;
970
971 err = fill_inode(dir, &rinfo->diri, rinfo->dirfrag,
972 session, req->r_request_started, -1,
973 &req->r_caps_reservation);
974 if (err < 0)
975 return err;
976 }
977
Sage Weil9358c6d2010-03-30 13:54:41 -0700978 /*
979 * ignore null lease/binding on snapdir ENOENT, or else we
980 * will have trouble splicing in the virtual snapdir later
981 */
982 if (rinfo->head->is_dentry && !req->r_aborted &&
983 (rinfo->head->is_target || strncmp(req->r_dentry->d_name.name,
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700984 fsc->mount_options->snapdir_name,
Sage Weil9358c6d2010-03-30 13:54:41 -0700985 req->r_dentry->d_name.len))) {
Sage Weil355da1e2009-10-06 11:31:08 -0700986 /*
987 * lookup link rename : null -> possibly existing inode
988 * mknod symlink mkdir : null -> new inode
989 * unlink : linked -> null
990 */
991 struct inode *dir = req->r_locked_dir;
992 struct dentry *dn = req->r_dentry;
993 bool have_dir_cap, have_lease;
994
995 BUG_ON(!dn);
996 BUG_ON(!dir);
997 BUG_ON(dn->d_parent->d_inode != dir);
998 BUG_ON(ceph_ino(dir) !=
999 le64_to_cpu(rinfo->diri.in->ino));
1000 BUG_ON(ceph_snap(dir) !=
1001 le64_to_cpu(rinfo->diri.in->snapid));
1002
Sage Weil355da1e2009-10-06 11:31:08 -07001003 /* do we have a lease on the whole dir? */
1004 have_dir_cap =
1005 (le32_to_cpu(rinfo->diri.in->cap.caps) &
1006 CEPH_CAP_FILE_SHARED);
1007
1008 /* do we have a dn lease? */
1009 have_lease = have_dir_cap ||
1010 (le16_to_cpu(rinfo->dlease->mask) &
1011 CEPH_LOCK_DN);
1012
1013 if (!have_lease)
1014 dout("fill_trace no dentry lease or dir cap\n");
1015
1016 /* rename? */
1017 if (req->r_old_dentry && req->r_op == CEPH_MDS_OP_RENAME) {
1018 dout(" src %p '%.*s' dst %p '%.*s'\n",
1019 req->r_old_dentry,
1020 req->r_old_dentry->d_name.len,
1021 req->r_old_dentry->d_name.name,
1022 dn, dn->d_name.len, dn->d_name.name);
1023 dout("fill_trace doing d_move %p -> %p\n",
1024 req->r_old_dentry, dn);
Sage Weilc10f5e12010-04-16 12:56:11 -07001025
1026 /* d_move screws up d_subdirs order */
1027 ceph_i_clear(dir, CEPH_I_COMPLETE);
1028
Sage Weil355da1e2009-10-06 11:31:08 -07001029 d_move(req->r_old_dentry, dn);
1030 dout(" src %p '%.*s' dst %p '%.*s'\n",
1031 req->r_old_dentry,
1032 req->r_old_dentry->d_name.len,
1033 req->r_old_dentry->d_name.name,
1034 dn, dn->d_name.len, dn->d_name.name);
Sage Weil81a6cf22010-05-14 09:35:38 -07001035
Sage Weilc4a29f22009-12-21 11:42:18 -08001036 /* ensure target dentry is invalidated, despite
1037 rehashing bug in vfs_rename_dir */
Sage Weil81a6cf22010-05-14 09:35:38 -07001038 ceph_invalidate_dentry_lease(dn);
1039
Sage Weil355da1e2009-10-06 11:31:08 -07001040 /* take overwritten dentry's readdir offset */
Sage Weil1cd39352010-05-03 22:08:02 -07001041 dout("dn %p gets %p offset %lld (old offset %lld)\n",
1042 req->r_old_dentry, dn, ceph_dentry(dn)->offset,
1043 ceph_dentry(req->r_old_dentry)->offset);
Sage Weil355da1e2009-10-06 11:31:08 -07001044 ceph_dentry(req->r_old_dentry)->offset =
1045 ceph_dentry(dn)->offset;
Sage Weil81a6cf22010-05-14 09:35:38 -07001046
Sage Weil355da1e2009-10-06 11:31:08 -07001047 dn = req->r_old_dentry; /* use old_dentry */
1048 in = dn->d_inode;
1049 }
1050
1051 /* null dentry? */
1052 if (!rinfo->head->is_target) {
1053 dout("fill_trace null dentry\n");
1054 if (dn->d_inode) {
1055 dout("d_delete %p\n", dn);
1056 d_delete(dn);
1057 } else {
1058 dout("d_instantiate %p NULL\n", dn);
1059 d_instantiate(dn, NULL);
1060 if (have_lease && d_unhashed(dn))
1061 d_rehash(dn);
1062 update_dentry_lease(dn, rinfo->dlease,
1063 session,
1064 req->r_request_started);
1065 }
1066 goto done;
1067 }
1068
1069 /* attach proper inode */
1070 ininfo = rinfo->targeti.in;
1071 vino.ino = le64_to_cpu(ininfo->ino);
1072 vino.snap = le64_to_cpu(ininfo->snapid);
Sage Weild8b16b32010-11-06 12:41:16 -07001073 in = dn->d_inode;
1074 if (!in) {
Sage Weil355da1e2009-10-06 11:31:08 -07001075 in = ceph_get_inode(sb, vino);
1076 if (IS_ERR(in)) {
1077 pr_err("fill_trace bad get_inode "
1078 "%llx.%llx\n", vino.ino, vino.snap);
1079 err = PTR_ERR(in);
1080 d_delete(dn);
1081 goto done;
1082 }
Sage Weil467c5252010-09-13 11:39:20 -07001083 dn = splice_dentry(dn, in, &have_lease, true);
Sage Weil355da1e2009-10-06 11:31:08 -07001084 if (IS_ERR(dn)) {
1085 err = PTR_ERR(dn);
1086 goto done;
1087 }
1088 req->r_dentry = dn; /* may have spliced */
1089 igrab(in);
1090 } else if (ceph_ino(in) == vino.ino &&
1091 ceph_snap(in) == vino.snap) {
1092 igrab(in);
1093 } else {
1094 dout(" %p links to %p %llx.%llx, not %llx.%llx\n",
1095 dn, in, ceph_ino(in), ceph_snap(in),
1096 vino.ino, vino.snap);
1097 have_lease = false;
1098 in = NULL;
1099 }
1100
1101 if (have_lease)
1102 update_dentry_lease(dn, rinfo->dlease, session,
1103 req->r_request_started);
1104 dout(" final dn %p\n", dn);
1105 i++;
1106 } else if (req->r_op == CEPH_MDS_OP_LOOKUPSNAP ||
1107 req->r_op == CEPH_MDS_OP_MKSNAP) {
1108 struct dentry *dn = req->r_dentry;
1109
1110 /* fill out a snapdir LOOKUPSNAP dentry */
1111 BUG_ON(!dn);
1112 BUG_ON(!req->r_locked_dir);
1113 BUG_ON(ceph_snap(req->r_locked_dir) != CEPH_SNAPDIR);
1114 ininfo = rinfo->targeti.in;
1115 vino.ino = le64_to_cpu(ininfo->ino);
1116 vino.snap = le64_to_cpu(ininfo->snapid);
1117 in = ceph_get_inode(sb, vino);
1118 if (IS_ERR(in)) {
1119 pr_err("fill_inode get_inode badness %llx.%llx\n",
1120 vino.ino, vino.snap);
1121 err = PTR_ERR(in);
1122 d_delete(dn);
1123 goto done;
1124 }
1125 dout(" linking snapped dir %p to dn %p\n", in, dn);
Sage Weil467c5252010-09-13 11:39:20 -07001126 dn = splice_dentry(dn, in, NULL, true);
Sage Weil355da1e2009-10-06 11:31:08 -07001127 if (IS_ERR(dn)) {
1128 err = PTR_ERR(dn);
1129 goto done;
1130 }
1131 req->r_dentry = dn; /* may have spliced */
1132 igrab(in);
1133 rinfo->head->is_dentry = 1; /* fool notrace handlers */
1134 }
1135
1136 if (rinfo->head->is_target) {
1137 vino.ino = le64_to_cpu(rinfo->targeti.in->ino);
1138 vino.snap = le64_to_cpu(rinfo->targeti.in->snapid);
1139
1140 if (in == NULL || ceph_ino(in) != vino.ino ||
1141 ceph_snap(in) != vino.snap) {
1142 in = ceph_get_inode(sb, vino);
1143 if (IS_ERR(in)) {
1144 err = PTR_ERR(in);
1145 goto done;
1146 }
1147 }
1148 req->r_target_inode = in;
1149
1150 err = fill_inode(in,
1151 &rinfo->targeti, NULL,
1152 session, req->r_request_started,
1153 (le32_to_cpu(rinfo->head->result) == 0) ?
1154 req->r_fmode : -1,
1155 &req->r_caps_reservation);
1156 if (err < 0) {
1157 pr_err("fill_inode badness %p %llx.%llx\n",
1158 in, ceph_vinop(in));
1159 goto done;
1160 }
1161 }
1162
1163done:
1164 dout("fill_trace done err=%d\n", err);
1165 return err;
1166}
1167
1168/*
1169 * Prepopulate our cache with readdir results, leases, etc.
1170 */
1171int ceph_readdir_prepopulate(struct ceph_mds_request *req,
1172 struct ceph_mds_session *session)
1173{
1174 struct dentry *parent = req->r_dentry;
1175 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
1176 struct qstr dname;
1177 struct dentry *dn;
1178 struct inode *in;
1179 int err = 0, i;
1180 struct inode *snapdir = NULL;
1181 struct ceph_mds_request_head *rhead = req->r_request->front.iov_base;
1182 u64 frag = le32_to_cpu(rhead->args.readdir.frag);
1183 struct ceph_dentry_info *di;
1184
1185 if (le32_to_cpu(rinfo->head->op) == CEPH_MDS_OP_LSSNAP) {
1186 snapdir = ceph_get_snapdir(parent->d_inode);
1187 parent = d_find_alias(snapdir);
1188 dout("readdir_prepopulate %d items under SNAPDIR dn %p\n",
1189 rinfo->dir_nr, parent);
1190 } else {
1191 dout("readdir_prepopulate %d items under dn %p\n",
1192 rinfo->dir_nr, parent);
1193 if (rinfo->dir_dir)
1194 ceph_fill_dirfrag(parent->d_inode, rinfo->dir_dir);
1195 }
1196
1197 for (i = 0; i < rinfo->dir_nr; i++) {
1198 struct ceph_vino vino;
1199
1200 dname.name = rinfo->dir_dname[i];
1201 dname.len = rinfo->dir_dname_len[i];
1202 dname.hash = full_name_hash(dname.name, dname.len);
1203
1204 vino.ino = le64_to_cpu(rinfo->dir_in[i].in->ino);
1205 vino.snap = le64_to_cpu(rinfo->dir_in[i].in->snapid);
1206
1207retry_lookup:
1208 dn = d_lookup(parent, &dname);
1209 dout("d_lookup on parent=%p name=%.*s got %p\n",
1210 parent, dname.len, dname.name, dn);
1211
1212 if (!dn) {
1213 dn = d_alloc(parent, &dname);
1214 dout("d_alloc %p '%.*s' = %p\n", parent,
1215 dname.len, dname.name, dn);
1216 if (dn == NULL) {
1217 dout("d_alloc badness\n");
1218 err = -ENOMEM;
1219 goto out;
1220 }
1221 err = ceph_init_dentry(dn);
Sage Weil8c696732010-07-22 14:11:56 -07001222 if (err < 0) {
1223 dput(dn);
Sage Weil355da1e2009-10-06 11:31:08 -07001224 goto out;
Sage Weil8c696732010-07-22 14:11:56 -07001225 }
Sage Weil355da1e2009-10-06 11:31:08 -07001226 } else if (dn->d_inode &&
1227 (ceph_ino(dn->d_inode) != vino.ino ||
1228 ceph_snap(dn->d_inode) != vino.snap)) {
1229 dout(" dn %p points to wrong inode %p\n",
1230 dn, dn->d_inode);
1231 d_delete(dn);
1232 dput(dn);
1233 goto retry_lookup;
1234 } else {
1235 /* reorder parent's d_subdirs */
1236 spin_lock(&dcache_lock);
1237 spin_lock(&dn->d_lock);
1238 list_move(&dn->d_u.d_child, &parent->d_subdirs);
1239 spin_unlock(&dn->d_lock);
1240 spin_unlock(&dcache_lock);
1241 }
1242
1243 di = dn->d_fsdata;
1244 di->offset = ceph_make_fpos(frag, i + req->r_readdir_offset);
1245
1246 /* inode */
1247 if (dn->d_inode) {
1248 in = dn->d_inode;
1249 } else {
1250 in = ceph_get_inode(parent->d_sb, vino);
Dan Carpenterac1f12e2010-08-25 09:11:35 +02001251 if (IS_ERR(in)) {
Sage Weil355da1e2009-10-06 11:31:08 -07001252 dout("new_inode badness\n");
1253 d_delete(dn);
1254 dput(dn);
Dan Carpenterac1f12e2010-08-25 09:11:35 +02001255 err = PTR_ERR(in);
Sage Weil355da1e2009-10-06 11:31:08 -07001256 goto out;
1257 }
Sage Weil467c5252010-09-13 11:39:20 -07001258 dn = splice_dentry(dn, in, NULL, false);
Sage Weild69ed052010-06-21 10:38:14 -07001259 if (IS_ERR(dn))
1260 dn = NULL;
Sage Weil355da1e2009-10-06 11:31:08 -07001261 }
1262
1263 if (fill_inode(in, &rinfo->dir_in[i], NULL, session,
1264 req->r_request_started, -1,
1265 &req->r_caps_reservation) < 0) {
1266 pr_err("fill_inode badness on %p\n", in);
Sage Weild69ed052010-06-21 10:38:14 -07001267 goto next_item;
Sage Weil355da1e2009-10-06 11:31:08 -07001268 }
Sage Weild69ed052010-06-21 10:38:14 -07001269 if (dn)
1270 update_dentry_lease(dn, rinfo->dir_dlease[i],
1271 req->r_session,
1272 req->r_request_started);
1273next_item:
1274 if (dn)
1275 dput(dn);
Sage Weil355da1e2009-10-06 11:31:08 -07001276 }
1277 req->r_did_prepopulate = true;
1278
1279out:
1280 if (snapdir) {
1281 iput(snapdir);
1282 dput(parent);
1283 }
1284 dout("readdir_prepopulate done\n");
1285 return err;
1286}
1287
1288int ceph_inode_set_size(struct inode *inode, loff_t size)
1289{
1290 struct ceph_inode_info *ci = ceph_inode(inode);
1291 int ret = 0;
1292
1293 spin_lock(&inode->i_lock);
1294 dout("set_size %p %llu -> %llu\n", inode, inode->i_size, size);
1295 inode->i_size = size;
1296 inode->i_blocks = (size + (1 << 9) - 1) >> 9;
1297
1298 /* tell the MDS if we are approaching max_size */
1299 if ((size << 1) >= ci->i_max_size &&
1300 (ci->i_reported_size << 1) < ci->i_max_size)
1301 ret = 1;
1302
1303 spin_unlock(&inode->i_lock);
1304 return ret;
1305}
1306
1307/*
1308 * Write back inode data in a worker thread. (This can't be done
1309 * in the message handler context.)
1310 */
Sage Weil3c6f6b72010-02-09 15:24:44 -08001311void ceph_queue_writeback(struct inode *inode)
1312{
1313 if (queue_work(ceph_inode_to_client(inode)->wb_wq,
1314 &ceph_inode(inode)->i_wb_work)) {
Sage Weil2c27c9a2010-02-17 15:45:51 -08001315 dout("ceph_queue_writeback %p\n", inode);
Sage Weil3c6f6b72010-02-09 15:24:44 -08001316 igrab(inode);
1317 } else {
Sage Weil2c27c9a2010-02-17 15:45:51 -08001318 dout("ceph_queue_writeback %p failed\n", inode);
Sage Weil3c6f6b72010-02-09 15:24:44 -08001319 }
1320}
1321
1322static void ceph_writeback_work(struct work_struct *work)
Sage Weil355da1e2009-10-06 11:31:08 -07001323{
1324 struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info,
1325 i_wb_work);
1326 struct inode *inode = &ci->vfs_inode;
1327
1328 dout("writeback %p\n", inode);
1329 filemap_fdatawrite(&inode->i_data);
1330 iput(inode);
1331}
1332
1333/*
Sage Weil3c6f6b72010-02-09 15:24:44 -08001334 * queue an async invalidation
1335 */
1336void ceph_queue_invalidate(struct inode *inode)
1337{
1338 if (queue_work(ceph_inode_to_client(inode)->pg_inv_wq,
1339 &ceph_inode(inode)->i_pg_inv_work)) {
1340 dout("ceph_queue_invalidate %p\n", inode);
1341 igrab(inode);
1342 } else {
1343 dout("ceph_queue_invalidate %p failed\n", inode);
1344 }
1345}
1346
1347/*
Yehuda Sadehc9af9fb2010-02-19 00:10:11 +00001348 * invalidate any pages that are not dirty or under writeback. this
1349 * includes pages that are clean and mapped.
1350 */
1351static void ceph_invalidate_nondirty_pages(struct address_space *mapping)
1352{
1353 struct pagevec pvec;
1354 pgoff_t next = 0;
1355 int i;
1356
1357 pagevec_init(&pvec, 0);
1358 while (pagevec_lookup(&pvec, mapping, next, PAGEVEC_SIZE)) {
1359 for (i = 0; i < pagevec_count(&pvec); i++) {
1360 struct page *page = pvec.pages[i];
1361 pgoff_t index;
1362 int skip_page =
1363 (PageDirty(page) || PageWriteback(page));
1364
1365 if (!skip_page)
1366 skip_page = !trylock_page(page);
1367
1368 /*
1369 * We really shouldn't be looking at the ->index of an
1370 * unlocked page. But we're not allowed to lock these
1371 * pages. So we rely upon nobody altering the ->index
1372 * of this (pinned-by-us) page.
1373 */
1374 index = page->index;
1375 if (index > next)
1376 next = index;
1377 next++;
1378
1379 if (skip_page)
1380 continue;
1381
1382 generic_error_remove_page(mapping, page);
1383 unlock_page(page);
1384 }
1385 pagevec_release(&pvec);
1386 cond_resched();
1387 }
1388}
1389
1390/*
Sage Weil355da1e2009-10-06 11:31:08 -07001391 * Invalidate inode pages in a worker thread. (This can't be done
1392 * in the message handler context.)
1393 */
Sage Weil3c6f6b72010-02-09 15:24:44 -08001394static void ceph_invalidate_work(struct work_struct *work)
Sage Weil355da1e2009-10-06 11:31:08 -07001395{
1396 struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info,
1397 i_pg_inv_work);
1398 struct inode *inode = &ci->vfs_inode;
1399 u32 orig_gen;
1400 int check = 0;
1401
1402 spin_lock(&inode->i_lock);
1403 dout("invalidate_pages %p gen %d revoking %d\n", inode,
1404 ci->i_rdcache_gen, ci->i_rdcache_revoking);
Sage Weilcd045cb2010-11-04 11:05:05 -07001405 if (ci->i_rdcache_revoking != ci->i_rdcache_gen) {
Sage Weil355da1e2009-10-06 11:31:08 -07001406 /* nevermind! */
Sage Weil355da1e2009-10-06 11:31:08 -07001407 spin_unlock(&inode->i_lock);
1408 goto out;
1409 }
1410 orig_gen = ci->i_rdcache_gen;
1411 spin_unlock(&inode->i_lock);
1412
Yehuda Sadehc9af9fb2010-02-19 00:10:11 +00001413 ceph_invalidate_nondirty_pages(inode->i_mapping);
Sage Weil355da1e2009-10-06 11:31:08 -07001414
1415 spin_lock(&inode->i_lock);
Sage Weilcd045cb2010-11-04 11:05:05 -07001416 if (orig_gen == ci->i_rdcache_gen &&
1417 orig_gen == ci->i_rdcache_revoking) {
Sage Weil355da1e2009-10-06 11:31:08 -07001418 dout("invalidate_pages %p gen %d successful\n", inode,
1419 ci->i_rdcache_gen);
Sage Weilcd045cb2010-11-04 11:05:05 -07001420 ci->i_rdcache_revoking--;
Sage Weil355da1e2009-10-06 11:31:08 -07001421 check = 1;
1422 } else {
Sage Weilcd045cb2010-11-04 11:05:05 -07001423 dout("invalidate_pages %p gen %d raced, now %d revoking %d\n",
1424 inode, orig_gen, ci->i_rdcache_gen,
1425 ci->i_rdcache_revoking);
Sage Weil355da1e2009-10-06 11:31:08 -07001426 }
1427 spin_unlock(&inode->i_lock);
1428
1429 if (check)
1430 ceph_check_caps(ci, 0, NULL);
1431out:
1432 iput(inode);
1433}
1434
1435
1436/*
1437 * called by trunc_wq; take i_mutex ourselves
1438 *
1439 * We also truncate in a separate thread as well.
1440 */
Sage Weil3c6f6b72010-02-09 15:24:44 -08001441static void ceph_vmtruncate_work(struct work_struct *work)
Sage Weil355da1e2009-10-06 11:31:08 -07001442{
1443 struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info,
1444 i_vmtruncate_work);
1445 struct inode *inode = &ci->vfs_inode;
1446
1447 dout("vmtruncate_work %p\n", inode);
1448 mutex_lock(&inode->i_mutex);
1449 __ceph_do_pending_vmtruncate(inode);
1450 mutex_unlock(&inode->i_mutex);
1451 iput(inode);
1452}
1453
1454/*
Sage Weil3c6f6b72010-02-09 15:24:44 -08001455 * Queue an async vmtruncate. If we fail to queue work, we will handle
1456 * the truncation the next time we call __ceph_do_pending_vmtruncate.
1457 */
1458void ceph_queue_vmtruncate(struct inode *inode)
1459{
1460 struct ceph_inode_info *ci = ceph_inode(inode);
1461
Cheng Renquan640ef792010-03-26 17:40:33 +08001462 if (queue_work(ceph_sb_to_client(inode->i_sb)->trunc_wq,
Sage Weil3c6f6b72010-02-09 15:24:44 -08001463 &ci->i_vmtruncate_work)) {
1464 dout("ceph_queue_vmtruncate %p\n", inode);
1465 igrab(inode);
1466 } else {
1467 dout("ceph_queue_vmtruncate %p failed, pending=%d\n",
1468 inode, ci->i_truncate_pending);
1469 }
1470}
1471
1472/*
Sage Weil355da1e2009-10-06 11:31:08 -07001473 * called with i_mutex held.
1474 *
1475 * Make sure any pending truncation is applied before doing anything
1476 * that may depend on it.
1477 */
1478void __ceph_do_pending_vmtruncate(struct inode *inode)
1479{
1480 struct ceph_inode_info *ci = ceph_inode(inode);
1481 u64 to;
1482 int wrbuffer_refs, wake = 0;
1483
1484retry:
1485 spin_lock(&inode->i_lock);
1486 if (ci->i_truncate_pending == 0) {
1487 dout("__do_pending_vmtruncate %p none pending\n", inode);
1488 spin_unlock(&inode->i_lock);
1489 return;
1490 }
1491
1492 /*
1493 * make sure any dirty snapped pages are flushed before we
1494 * possibly truncate them.. so write AND block!
1495 */
1496 if (ci->i_wrbuffer_ref_head < ci->i_wrbuffer_ref) {
1497 dout("__do_pending_vmtruncate %p flushing snaps first\n",
1498 inode);
1499 spin_unlock(&inode->i_lock);
1500 filemap_write_and_wait_range(&inode->i_data, 0,
1501 inode->i_sb->s_maxbytes);
1502 goto retry;
1503 }
1504
1505 to = ci->i_truncate_size;
1506 wrbuffer_refs = ci->i_wrbuffer_ref;
1507 dout("__do_pending_vmtruncate %p (%d) to %lld\n", inode,
1508 ci->i_truncate_pending, to);
1509 spin_unlock(&inode->i_lock);
1510
1511 truncate_inode_pages(inode->i_mapping, to);
1512
1513 spin_lock(&inode->i_lock);
1514 ci->i_truncate_pending--;
1515 if (ci->i_truncate_pending == 0)
1516 wake = 1;
1517 spin_unlock(&inode->i_lock);
1518
1519 if (wrbuffer_refs == 0)
1520 ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL);
1521 if (wake)
Yehuda Sadeh03066f22010-07-27 13:11:08 -07001522 wake_up_all(&ci->i_cap_wq);
Sage Weil355da1e2009-10-06 11:31:08 -07001523}
1524
1525
1526/*
1527 * symlinks
1528 */
1529static void *ceph_sym_follow_link(struct dentry *dentry, struct nameidata *nd)
1530{
1531 struct ceph_inode_info *ci = ceph_inode(dentry->d_inode);
1532 nd_set_link(nd, ci->i_symlink);
1533 return NULL;
1534}
1535
1536static const struct inode_operations ceph_symlink_iops = {
1537 .readlink = generic_readlink,
1538 .follow_link = ceph_sym_follow_link,
1539};
1540
1541/*
1542 * setattr
1543 */
1544int ceph_setattr(struct dentry *dentry, struct iattr *attr)
1545{
1546 struct inode *inode = dentry->d_inode;
1547 struct ceph_inode_info *ci = ceph_inode(inode);
1548 struct inode *parent_inode = dentry->d_parent->d_inode;
1549 const unsigned int ia_valid = attr->ia_valid;
1550 struct ceph_mds_request *req;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -07001551 struct ceph_mds_client *mdsc = ceph_sb_to_client(dentry->d_sb)->mdsc;
Sage Weil355da1e2009-10-06 11:31:08 -07001552 int issued;
1553 int release = 0, dirtied = 0;
1554 int mask = 0;
1555 int err = 0;
Sage Weil355da1e2009-10-06 11:31:08 -07001556
1557 if (ceph_snap(inode) != CEPH_NOSNAP)
1558 return -EROFS;
1559
1560 __ceph_do_pending_vmtruncate(inode);
1561
1562 err = inode_change_ok(inode, attr);
1563 if (err != 0)
1564 return err;
1565
1566 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETATTR,
1567 USE_AUTH_MDS);
1568 if (IS_ERR(req))
1569 return PTR_ERR(req);
1570
1571 spin_lock(&inode->i_lock);
1572 issued = __ceph_caps_issued(ci, NULL);
1573 dout("setattr %p issued %s\n", inode, ceph_cap_string(issued));
1574
1575 if (ia_valid & ATTR_UID) {
1576 dout("setattr %p uid %d -> %d\n", inode,
1577 inode->i_uid, attr->ia_uid);
1578 if (issued & CEPH_CAP_AUTH_EXCL) {
1579 inode->i_uid = attr->ia_uid;
1580 dirtied |= CEPH_CAP_AUTH_EXCL;
1581 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
1582 attr->ia_uid != inode->i_uid) {
1583 req->r_args.setattr.uid = cpu_to_le32(attr->ia_uid);
1584 mask |= CEPH_SETATTR_UID;
1585 release |= CEPH_CAP_AUTH_SHARED;
1586 }
1587 }
1588 if (ia_valid & ATTR_GID) {
1589 dout("setattr %p gid %d -> %d\n", inode,
1590 inode->i_gid, attr->ia_gid);
1591 if (issued & CEPH_CAP_AUTH_EXCL) {
1592 inode->i_gid = attr->ia_gid;
1593 dirtied |= CEPH_CAP_AUTH_EXCL;
1594 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
1595 attr->ia_gid != inode->i_gid) {
1596 req->r_args.setattr.gid = cpu_to_le32(attr->ia_gid);
1597 mask |= CEPH_SETATTR_GID;
1598 release |= CEPH_CAP_AUTH_SHARED;
1599 }
1600 }
1601 if (ia_valid & ATTR_MODE) {
1602 dout("setattr %p mode 0%o -> 0%o\n", inode, inode->i_mode,
1603 attr->ia_mode);
1604 if (issued & CEPH_CAP_AUTH_EXCL) {
1605 inode->i_mode = attr->ia_mode;
1606 dirtied |= CEPH_CAP_AUTH_EXCL;
1607 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
1608 attr->ia_mode != inode->i_mode) {
1609 req->r_args.setattr.mode = cpu_to_le32(attr->ia_mode);
1610 mask |= CEPH_SETATTR_MODE;
1611 release |= CEPH_CAP_AUTH_SHARED;
1612 }
1613 }
1614
1615 if (ia_valid & ATTR_ATIME) {
1616 dout("setattr %p atime %ld.%ld -> %ld.%ld\n", inode,
1617 inode->i_atime.tv_sec, inode->i_atime.tv_nsec,
1618 attr->ia_atime.tv_sec, attr->ia_atime.tv_nsec);
1619 if (issued & CEPH_CAP_FILE_EXCL) {
1620 ci->i_time_warp_seq++;
1621 inode->i_atime = attr->ia_atime;
1622 dirtied |= CEPH_CAP_FILE_EXCL;
1623 } else if ((issued & CEPH_CAP_FILE_WR) &&
1624 timespec_compare(&inode->i_atime,
1625 &attr->ia_atime) < 0) {
1626 inode->i_atime = attr->ia_atime;
1627 dirtied |= CEPH_CAP_FILE_WR;
1628 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
1629 !timespec_equal(&inode->i_atime, &attr->ia_atime)) {
1630 ceph_encode_timespec(&req->r_args.setattr.atime,
1631 &attr->ia_atime);
1632 mask |= CEPH_SETATTR_ATIME;
1633 release |= CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_RD |
1634 CEPH_CAP_FILE_WR;
1635 }
1636 }
1637 if (ia_valid & ATTR_MTIME) {
1638 dout("setattr %p mtime %ld.%ld -> %ld.%ld\n", inode,
1639 inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec,
1640 attr->ia_mtime.tv_sec, attr->ia_mtime.tv_nsec);
1641 if (issued & CEPH_CAP_FILE_EXCL) {
1642 ci->i_time_warp_seq++;
1643 inode->i_mtime = attr->ia_mtime;
1644 dirtied |= CEPH_CAP_FILE_EXCL;
1645 } else if ((issued & CEPH_CAP_FILE_WR) &&
1646 timespec_compare(&inode->i_mtime,
1647 &attr->ia_mtime) < 0) {
1648 inode->i_mtime = attr->ia_mtime;
1649 dirtied |= CEPH_CAP_FILE_WR;
1650 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
1651 !timespec_equal(&inode->i_mtime, &attr->ia_mtime)) {
1652 ceph_encode_timespec(&req->r_args.setattr.mtime,
1653 &attr->ia_mtime);
1654 mask |= CEPH_SETATTR_MTIME;
1655 release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_RD |
1656 CEPH_CAP_FILE_WR;
1657 }
1658 }
1659 if (ia_valid & ATTR_SIZE) {
1660 dout("setattr %p size %lld -> %lld\n", inode,
1661 inode->i_size, attr->ia_size);
1662 if (attr->ia_size > inode->i_sb->s_maxbytes) {
1663 err = -EINVAL;
1664 goto out;
1665 }
1666 if ((issued & CEPH_CAP_FILE_EXCL) &&
1667 attr->ia_size > inode->i_size) {
1668 inode->i_size = attr->ia_size;
Sage Weil355da1e2009-10-06 11:31:08 -07001669 inode->i_blocks =
1670 (attr->ia_size + (1 << 9) - 1) >> 9;
1671 inode->i_ctime = attr->ia_ctime;
1672 ci->i_reported_size = attr->ia_size;
1673 dirtied |= CEPH_CAP_FILE_EXCL;
1674 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
1675 attr->ia_size != inode->i_size) {
1676 req->r_args.setattr.size = cpu_to_le64(attr->ia_size);
1677 req->r_args.setattr.old_size =
1678 cpu_to_le64(inode->i_size);
1679 mask |= CEPH_SETATTR_SIZE;
1680 release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_RD |
1681 CEPH_CAP_FILE_WR;
1682 }
1683 }
1684
1685 /* these do nothing */
1686 if (ia_valid & ATTR_CTIME) {
1687 bool only = (ia_valid & (ATTR_SIZE|ATTR_MTIME|ATTR_ATIME|
1688 ATTR_MODE|ATTR_UID|ATTR_GID)) == 0;
1689 dout("setattr %p ctime %ld.%ld -> %ld.%ld (%s)\n", inode,
1690 inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec,
1691 attr->ia_ctime.tv_sec, attr->ia_ctime.tv_nsec,
1692 only ? "ctime only" : "ignored");
1693 inode->i_ctime = attr->ia_ctime;
1694 if (only) {
1695 /*
1696 * if kernel wants to dirty ctime but nothing else,
1697 * we need to choose a cap to dirty under, or do
1698 * a almost-no-op setattr
1699 */
1700 if (issued & CEPH_CAP_AUTH_EXCL)
1701 dirtied |= CEPH_CAP_AUTH_EXCL;
1702 else if (issued & CEPH_CAP_FILE_EXCL)
1703 dirtied |= CEPH_CAP_FILE_EXCL;
1704 else if (issued & CEPH_CAP_XATTR_EXCL)
1705 dirtied |= CEPH_CAP_XATTR_EXCL;
1706 else
1707 mask |= CEPH_SETATTR_CTIME;
1708 }
1709 }
1710 if (ia_valid & ATTR_FILE)
1711 dout("setattr %p ATTR_FILE ... hrm!\n", inode);
1712
1713 if (dirtied) {
1714 __ceph_mark_dirty_caps(ci, dirtied);
1715 inode->i_ctime = CURRENT_TIME;
1716 }
1717
1718 release &= issued;
1719 spin_unlock(&inode->i_lock);
1720
Sage Weil355da1e2009-10-06 11:31:08 -07001721 if (mask) {
1722 req->r_inode = igrab(inode);
1723 req->r_inode_drop = release;
1724 req->r_args.setattr.mask = cpu_to_le32(mask);
1725 req->r_num_caps = 1;
1726 err = ceph_mdsc_do_request(mdsc, parent_inode, req);
1727 }
1728 dout("setattr %p result=%d (%s locally, %d remote)\n", inode, err,
1729 ceph_cap_string(dirtied), mask);
1730
1731 ceph_mdsc_put_request(req);
1732 __ceph_do_pending_vmtruncate(inode);
1733 return err;
1734out:
1735 spin_unlock(&inode->i_lock);
1736 ceph_mdsc_put_request(req);
1737 return err;
1738}
1739
1740/*
1741 * Verify that we have a lease on the given mask. If not,
1742 * do a getattr against an mds.
1743 */
1744int ceph_do_getattr(struct inode *inode, int mask)
1745{
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -07001746 struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb);
1747 struct ceph_mds_client *mdsc = fsc->mdsc;
Sage Weil355da1e2009-10-06 11:31:08 -07001748 struct ceph_mds_request *req;
1749 int err;
1750
1751 if (ceph_snap(inode) == CEPH_SNAPDIR) {
1752 dout("do_getattr inode %p SNAPDIR\n", inode);
1753 return 0;
1754 }
1755
Sage Weilb7495fc2010-11-09 12:43:12 -08001756 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 -07001757 if (ceph_caps_issued_mask(ceph_inode(inode), mask, 1))
1758 return 0;
1759
1760 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS);
1761 if (IS_ERR(req))
1762 return PTR_ERR(req);
1763 req->r_inode = igrab(inode);
1764 req->r_num_caps = 1;
1765 req->r_args.getattr.mask = cpu_to_le32(mask);
1766 err = ceph_mdsc_do_request(mdsc, NULL, req);
1767 ceph_mdsc_put_request(req);
1768 dout("do_getattr result=%d\n", err);
1769 return err;
1770}
1771
1772
1773/*
1774 * Check inode permissions. We verify we have a valid value for
1775 * the AUTH cap, then call the generic handler.
1776 */
1777int ceph_permission(struct inode *inode, int mask)
1778{
1779 int err = ceph_do_getattr(inode, CEPH_CAP_AUTH_SHARED);
1780
1781 if (!err)
1782 err = generic_permission(inode, mask, NULL);
1783 return err;
1784}
1785
1786/*
1787 * Get all attributes. Hopefully somedata we'll have a statlite()
1788 * and can limit the fields we require to be accurate.
1789 */
1790int ceph_getattr(struct vfsmount *mnt, struct dentry *dentry,
1791 struct kstat *stat)
1792{
1793 struct inode *inode = dentry->d_inode;
Sage Weil232d4b02009-10-21 11:21:49 -07001794 struct ceph_inode_info *ci = ceph_inode(inode);
Sage Weil355da1e2009-10-06 11:31:08 -07001795 int err;
1796
1797 err = ceph_do_getattr(inode, CEPH_STAT_CAP_INODE_ALL);
1798 if (!err) {
1799 generic_fillattr(inode, stat);
1800 stat->ino = inode->i_ino;
1801 if (ceph_snap(inode) != CEPH_NOSNAP)
1802 stat->dev = ceph_snap(inode);
1803 else
1804 stat->dev = 0;
Sage Weil232d4b02009-10-21 11:21:49 -07001805 if (S_ISDIR(inode->i_mode)) {
1806 stat->size = ci->i_rbytes;
1807 stat->blocks = 0;
Sage Weil355da1e2009-10-06 11:31:08 -07001808 stat->blksize = 65536;
Sage Weil232d4b02009-10-21 11:21:49 -07001809 }
Sage Weil355da1e2009-10-06 11:31:08 -07001810 }
1811 return err;
1812}