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3d14c5d2 | 1 | #include <linux/ceph/ceph_debug.h> |
355da1eb SW |
2 | |
3 | #include <linux/module.h> | |
4 | #include <linux/fs.h> | |
355da1eb SW |
5 | #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> | |
c9af9fb6 | 12 | #include <linux/pagevec.h> |
355da1eb SW |
13 | |
14 | #include "super.h" | |
3d14c5d2 YS |
15 | #include "mds_client.h" |
16 | #include <linux/ceph/decode.h> | |
355da1eb SW |
17 | |
18 | /* | |
19 | * Ceph inode operations | |
20 | * | |
21 | * Implement basic inode helpers (get, alloc) and inode ops (getattr, | |
22 | * setattr, etc.), xattr helpers, and helpers for assimilating | |
23 | * metadata returned by the MDS into our cache. | |
24 | * | |
25 | * Also define helpers for doing asynchronous writeback, invalidation, | |
26 | * and truncation for the benefit of those who can't afford to block | |
27 | * (typically because they are in the message handler path). | |
28 | */ | |
29 | ||
30 | static const struct inode_operations ceph_symlink_iops; | |
31 | ||
3c6f6b79 SW |
32 | static void ceph_invalidate_work(struct work_struct *work); |
33 | static void ceph_writeback_work(struct work_struct *work); | |
34 | static void ceph_vmtruncate_work(struct work_struct *work); | |
355da1eb SW |
35 | |
36 | /* | |
37 | * find or create an inode, given the ceph ino number | |
38 | */ | |
ad1fee96 YS |
39 | static int ceph_set_ino_cb(struct inode *inode, void *data) |
40 | { | |
41 | ceph_inode(inode)->i_vino = *(struct ceph_vino *)data; | |
42 | inode->i_ino = ceph_vino_to_ino(*(struct ceph_vino *)data); | |
43 | return 0; | |
44 | } | |
45 | ||
355da1eb SW |
46 | struct inode *ceph_get_inode(struct super_block *sb, struct ceph_vino vino) |
47 | { | |
48 | struct inode *inode; | |
49 | ino_t t = ceph_vino_to_ino(vino); | |
50 | ||
51 | inode = iget5_locked(sb, t, ceph_ino_compare, ceph_set_ino_cb, &vino); | |
52 | if (inode == NULL) | |
53 | return ERR_PTR(-ENOMEM); | |
54 | if (inode->i_state & I_NEW) { | |
55 | dout("get_inode created new inode %p %llx.%llx ino %llx\n", | |
56 | inode, ceph_vinop(inode), (u64)inode->i_ino); | |
57 | unlock_new_inode(inode); | |
58 | } | |
59 | ||
60 | dout("get_inode on %lu=%llx.%llx got %p\n", inode->i_ino, vino.ino, | |
61 | vino.snap, inode); | |
62 | return inode; | |
63 | } | |
64 | ||
65 | /* | |
66 | * get/constuct snapdir inode for a given directory | |
67 | */ | |
68 | struct inode *ceph_get_snapdir(struct inode *parent) | |
69 | { | |
70 | struct ceph_vino vino = { | |
71 | .ino = ceph_ino(parent), | |
72 | .snap = CEPH_SNAPDIR, | |
73 | }; | |
74 | struct inode *inode = ceph_get_inode(parent->i_sb, vino); | |
b377ff13 | 75 | struct ceph_inode_info *ci = ceph_inode(inode); |
355da1eb SW |
76 | |
77 | BUG_ON(!S_ISDIR(parent->i_mode)); | |
78 | if (IS_ERR(inode)) | |
7e34bc52 | 79 | return inode; |
355da1eb SW |
80 | inode->i_mode = parent->i_mode; |
81 | inode->i_uid = parent->i_uid; | |
82 | inode->i_gid = parent->i_gid; | |
83 | inode->i_op = &ceph_dir_iops; | |
84 | inode->i_fop = &ceph_dir_fops; | |
b377ff13 SW |
85 | ci->i_snap_caps = CEPH_CAP_PIN; /* so we can open */ |
86 | ci->i_rbytes = 0; | |
355da1eb SW |
87 | return inode; |
88 | } | |
89 | ||
90 | const struct inode_operations ceph_file_iops = { | |
91 | .permission = ceph_permission, | |
92 | .setattr = ceph_setattr, | |
93 | .getattr = ceph_getattr, | |
94 | .setxattr = ceph_setxattr, | |
95 | .getxattr = ceph_getxattr, | |
96 | .listxattr = ceph_listxattr, | |
97 | .removexattr = ceph_removexattr, | |
98 | }; | |
99 | ||
100 | ||
101 | /* | |
102 | * We use a 'frag tree' to keep track of the MDS's directory fragments | |
103 | * for a given inode (usually there is just a single fragment). We | |
104 | * need to know when a child frag is delegated to a new MDS, or when | |
105 | * it is flagged as replicated, so we can direct our requests | |
106 | * accordingly. | |
107 | */ | |
108 | ||
109 | /* | |
110 | * find/create a frag in the tree | |
111 | */ | |
112 | static struct ceph_inode_frag *__get_or_create_frag(struct ceph_inode_info *ci, | |
113 | u32 f) | |
114 | { | |
115 | struct rb_node **p; | |
116 | struct rb_node *parent = NULL; | |
117 | struct ceph_inode_frag *frag; | |
118 | int c; | |
119 | ||
120 | p = &ci->i_fragtree.rb_node; | |
121 | while (*p) { | |
122 | parent = *p; | |
123 | frag = rb_entry(parent, struct ceph_inode_frag, node); | |
124 | c = ceph_frag_compare(f, frag->frag); | |
125 | if (c < 0) | |
126 | p = &(*p)->rb_left; | |
127 | else if (c > 0) | |
128 | p = &(*p)->rb_right; | |
129 | else | |
130 | return frag; | |
131 | } | |
132 | ||
133 | frag = kmalloc(sizeof(*frag), GFP_NOFS); | |
134 | if (!frag) { | |
135 | pr_err("__get_or_create_frag ENOMEM on %p %llx.%llx " | |
136 | "frag %x\n", &ci->vfs_inode, | |
137 | ceph_vinop(&ci->vfs_inode), f); | |
138 | return ERR_PTR(-ENOMEM); | |
139 | } | |
140 | frag->frag = f; | |
141 | frag->split_by = 0; | |
142 | frag->mds = -1; | |
143 | frag->ndist = 0; | |
144 | ||
145 | rb_link_node(&frag->node, parent, p); | |
146 | rb_insert_color(&frag->node, &ci->i_fragtree); | |
147 | ||
148 | dout("get_or_create_frag added %llx.%llx frag %x\n", | |
149 | ceph_vinop(&ci->vfs_inode), f); | |
150 | return frag; | |
151 | } | |
152 | ||
153 | /* | |
154 | * find a specific frag @f | |
155 | */ | |
156 | struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci, u32 f) | |
157 | { | |
158 | struct rb_node *n = ci->i_fragtree.rb_node; | |
159 | ||
160 | while (n) { | |
161 | struct ceph_inode_frag *frag = | |
162 | rb_entry(n, struct ceph_inode_frag, node); | |
163 | int c = ceph_frag_compare(f, frag->frag); | |
164 | if (c < 0) | |
165 | n = n->rb_left; | |
166 | else if (c > 0) | |
167 | n = n->rb_right; | |
168 | else | |
169 | return frag; | |
170 | } | |
171 | return NULL; | |
172 | } | |
173 | ||
174 | /* | |
175 | * Choose frag containing the given value @v. If @pfrag is | |
176 | * specified, copy the frag delegation info to the caller if | |
177 | * it is present. | |
178 | */ | |
179 | u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v, | |
180 | struct ceph_inode_frag *pfrag, | |
181 | int *found) | |
182 | { | |
183 | u32 t = ceph_frag_make(0, 0); | |
184 | struct ceph_inode_frag *frag; | |
185 | unsigned nway, i; | |
186 | u32 n; | |
187 | ||
188 | if (found) | |
189 | *found = 0; | |
190 | ||
191 | mutex_lock(&ci->i_fragtree_mutex); | |
192 | while (1) { | |
193 | WARN_ON(!ceph_frag_contains_value(t, v)); | |
194 | frag = __ceph_find_frag(ci, t); | |
195 | if (!frag) | |
196 | break; /* t is a leaf */ | |
197 | if (frag->split_by == 0) { | |
198 | if (pfrag) | |
199 | memcpy(pfrag, frag, sizeof(*pfrag)); | |
200 | if (found) | |
201 | *found = 1; | |
202 | break; | |
203 | } | |
204 | ||
205 | /* choose child */ | |
206 | nway = 1 << frag->split_by; | |
207 | dout("choose_frag(%x) %x splits by %d (%d ways)\n", v, t, | |
208 | frag->split_by, nway); | |
209 | for (i = 0; i < nway; i++) { | |
210 | n = ceph_frag_make_child(t, frag->split_by, i); | |
211 | if (ceph_frag_contains_value(n, v)) { | |
212 | t = n; | |
213 | break; | |
214 | } | |
215 | } | |
216 | BUG_ON(i == nway); | |
217 | } | |
218 | dout("choose_frag(%x) = %x\n", v, t); | |
219 | ||
220 | mutex_unlock(&ci->i_fragtree_mutex); | |
221 | return t; | |
222 | } | |
223 | ||
224 | /* | |
225 | * Process dirfrag (delegation) info from the mds. Include leaf | |
226 | * fragment in tree ONLY if ndist > 0. Otherwise, only | |
227 | * branches/splits are included in i_fragtree) | |
228 | */ | |
229 | static int ceph_fill_dirfrag(struct inode *inode, | |
230 | struct ceph_mds_reply_dirfrag *dirinfo) | |
231 | { | |
232 | struct ceph_inode_info *ci = ceph_inode(inode); | |
233 | struct ceph_inode_frag *frag; | |
234 | u32 id = le32_to_cpu(dirinfo->frag); | |
235 | int mds = le32_to_cpu(dirinfo->auth); | |
236 | int ndist = le32_to_cpu(dirinfo->ndist); | |
237 | int i; | |
238 | int err = 0; | |
239 | ||
240 | mutex_lock(&ci->i_fragtree_mutex); | |
241 | if (ndist == 0) { | |
242 | /* no delegation info needed. */ | |
243 | frag = __ceph_find_frag(ci, id); | |
244 | if (!frag) | |
245 | goto out; | |
246 | if (frag->split_by == 0) { | |
247 | /* tree leaf, remove */ | |
248 | dout("fill_dirfrag removed %llx.%llx frag %x" | |
249 | " (no ref)\n", ceph_vinop(inode), id); | |
250 | rb_erase(&frag->node, &ci->i_fragtree); | |
251 | kfree(frag); | |
252 | } else { | |
253 | /* tree branch, keep and clear */ | |
254 | dout("fill_dirfrag cleared %llx.%llx frag %x" | |
255 | " referral\n", ceph_vinop(inode), id); | |
256 | frag->mds = -1; | |
257 | frag->ndist = 0; | |
258 | } | |
259 | goto out; | |
260 | } | |
261 | ||
262 | ||
263 | /* find/add this frag to store mds delegation info */ | |
264 | frag = __get_or_create_frag(ci, id); | |
265 | if (IS_ERR(frag)) { | |
266 | /* this is not the end of the world; we can continue | |
267 | with bad/inaccurate delegation info */ | |
268 | pr_err("fill_dirfrag ENOMEM on mds ref %llx.%llx fg %x\n", | |
269 | ceph_vinop(inode), le32_to_cpu(dirinfo->frag)); | |
270 | err = -ENOMEM; | |
271 | goto out; | |
272 | } | |
273 | ||
274 | frag->mds = mds; | |
275 | frag->ndist = min_t(u32, ndist, CEPH_MAX_DIRFRAG_REP); | |
276 | for (i = 0; i < frag->ndist; i++) | |
277 | frag->dist[i] = le32_to_cpu(dirinfo->dist[i]); | |
278 | dout("fill_dirfrag %llx.%llx frag %x ndist=%d\n", | |
279 | ceph_vinop(inode), frag->frag, frag->ndist); | |
280 | ||
281 | out: | |
282 | mutex_unlock(&ci->i_fragtree_mutex); | |
283 | return err; | |
284 | } | |
285 | ||
286 | ||
287 | /* | |
288 | * initialize a newly allocated inode. | |
289 | */ | |
290 | struct inode *ceph_alloc_inode(struct super_block *sb) | |
291 | { | |
292 | struct ceph_inode_info *ci; | |
293 | int i; | |
294 | ||
295 | ci = kmem_cache_alloc(ceph_inode_cachep, GFP_NOFS); | |
296 | if (!ci) | |
297 | return NULL; | |
298 | ||
299 | dout("alloc_inode %p\n", &ci->vfs_inode); | |
300 | ||
301 | ci->i_version = 0; | |
302 | ci->i_time_warp_seq = 0; | |
303 | ci->i_ceph_flags = 0; | |
304 | ci->i_release_count = 0; | |
305 | ci->i_symlink = NULL; | |
306 | ||
6c0f3af7 SW |
307 | memset(&ci->i_dir_layout, 0, sizeof(ci->i_dir_layout)); |
308 | ||
355da1eb SW |
309 | ci->i_fragtree = RB_ROOT; |
310 | mutex_init(&ci->i_fragtree_mutex); | |
311 | ||
312 | ci->i_xattrs.blob = NULL; | |
313 | ci->i_xattrs.prealloc_blob = NULL; | |
314 | ci->i_xattrs.dirty = false; | |
315 | ci->i_xattrs.index = RB_ROOT; | |
316 | ci->i_xattrs.count = 0; | |
317 | ci->i_xattrs.names_size = 0; | |
318 | ci->i_xattrs.vals_size = 0; | |
319 | ci->i_xattrs.version = 0; | |
320 | ci->i_xattrs.index_version = 0; | |
321 | ||
322 | ci->i_caps = RB_ROOT; | |
323 | ci->i_auth_cap = NULL; | |
324 | ci->i_dirty_caps = 0; | |
325 | ci->i_flushing_caps = 0; | |
326 | INIT_LIST_HEAD(&ci->i_dirty_item); | |
327 | INIT_LIST_HEAD(&ci->i_flushing_item); | |
328 | ci->i_cap_flush_seq = 0; | |
329 | ci->i_cap_flush_last_tid = 0; | |
330 | memset(&ci->i_cap_flush_tid, 0, sizeof(ci->i_cap_flush_tid)); | |
331 | init_waitqueue_head(&ci->i_cap_wq); | |
332 | ci->i_hold_caps_min = 0; | |
333 | ci->i_hold_caps_max = 0; | |
334 | INIT_LIST_HEAD(&ci->i_cap_delay_list); | |
335 | ci->i_cap_exporting_mds = 0; | |
336 | ci->i_cap_exporting_mseq = 0; | |
337 | ci->i_cap_exporting_issued = 0; | |
338 | INIT_LIST_HEAD(&ci->i_cap_snaps); | |
339 | ci->i_head_snapc = NULL; | |
340 | ci->i_snap_caps = 0; | |
341 | ||
342 | for (i = 0; i < CEPH_FILE_MODE_NUM; i++) | |
343 | ci->i_nr_by_mode[i] = 0; | |
344 | ||
345 | ci->i_truncate_seq = 0; | |
346 | ci->i_truncate_size = 0; | |
347 | ci->i_truncate_pending = 0; | |
348 | ||
349 | ci->i_max_size = 0; | |
350 | ci->i_reported_size = 0; | |
351 | ci->i_wanted_max_size = 0; | |
352 | ci->i_requested_max_size = 0; | |
353 | ||
354 | ci->i_pin_ref = 0; | |
355 | ci->i_rd_ref = 0; | |
356 | ci->i_rdcache_ref = 0; | |
357 | ci->i_wr_ref = 0; | |
d3d0720d | 358 | ci->i_wb_ref = 0; |
355da1eb SW |
359 | ci->i_wrbuffer_ref = 0; |
360 | ci->i_wrbuffer_ref_head = 0; | |
361 | ci->i_shared_gen = 0; | |
362 | ci->i_rdcache_gen = 0; | |
363 | ci->i_rdcache_revoking = 0; | |
364 | ||
365 | INIT_LIST_HEAD(&ci->i_unsafe_writes); | |
366 | INIT_LIST_HEAD(&ci->i_unsafe_dirops); | |
367 | spin_lock_init(&ci->i_unsafe_lock); | |
368 | ||
369 | ci->i_snap_realm = NULL; | |
370 | INIT_LIST_HEAD(&ci->i_snap_realm_item); | |
371 | INIT_LIST_HEAD(&ci->i_snap_flush_item); | |
372 | ||
3c6f6b79 SW |
373 | INIT_WORK(&ci->i_wb_work, ceph_writeback_work); |
374 | INIT_WORK(&ci->i_pg_inv_work, ceph_invalidate_work); | |
355da1eb SW |
375 | |
376 | INIT_WORK(&ci->i_vmtruncate_work, ceph_vmtruncate_work); | |
377 | ||
378 | return &ci->vfs_inode; | |
379 | } | |
380 | ||
fa0d7e3d NP |
381 | static void ceph_i_callback(struct rcu_head *head) |
382 | { | |
383 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
384 | struct ceph_inode_info *ci = ceph_inode(inode); | |
385 | ||
386 | INIT_LIST_HEAD(&inode->i_dentry); | |
387 | kmem_cache_free(ceph_inode_cachep, ci); | |
388 | } | |
389 | ||
355da1eb SW |
390 | void ceph_destroy_inode(struct inode *inode) |
391 | { | |
392 | struct ceph_inode_info *ci = ceph_inode(inode); | |
393 | struct ceph_inode_frag *frag; | |
394 | struct rb_node *n; | |
395 | ||
396 | dout("destroy_inode %p ino %llx.%llx\n", inode, ceph_vinop(inode)); | |
397 | ||
398 | ceph_queue_caps_release(inode); | |
399 | ||
8b218b8a SW |
400 | /* |
401 | * we may still have a snap_realm reference if there are stray | |
402 | * caps in i_cap_exporting_issued or i_snap_caps. | |
403 | */ | |
404 | if (ci->i_snap_realm) { | |
405 | struct ceph_mds_client *mdsc = | |
3d14c5d2 | 406 | ceph_sb_to_client(ci->vfs_inode.i_sb)->mdsc; |
8b218b8a SW |
407 | struct ceph_snap_realm *realm = ci->i_snap_realm; |
408 | ||
409 | dout(" dropping residual ref to snap realm %p\n", realm); | |
410 | spin_lock(&realm->inodes_with_caps_lock); | |
411 | list_del_init(&ci->i_snap_realm_item); | |
412 | spin_unlock(&realm->inodes_with_caps_lock); | |
413 | ceph_put_snap_realm(mdsc, realm); | |
414 | } | |
415 | ||
355da1eb SW |
416 | kfree(ci->i_symlink); |
417 | while ((n = rb_first(&ci->i_fragtree)) != NULL) { | |
418 | frag = rb_entry(n, struct ceph_inode_frag, node); | |
419 | rb_erase(n, &ci->i_fragtree); | |
420 | kfree(frag); | |
421 | } | |
422 | ||
423 | __ceph_destroy_xattrs(ci); | |
b6c1d5b8 SW |
424 | if (ci->i_xattrs.blob) |
425 | ceph_buffer_put(ci->i_xattrs.blob); | |
426 | if (ci->i_xattrs.prealloc_blob) | |
427 | ceph_buffer_put(ci->i_xattrs.prealloc_blob); | |
355da1eb | 428 | |
fa0d7e3d | 429 | call_rcu(&inode->i_rcu, ceph_i_callback); |
355da1eb SW |
430 | } |
431 | ||
432 | ||
433 | /* | |
434 | * Helpers to fill in size, ctime, mtime, and atime. We have to be | |
435 | * careful because either the client or MDS may have more up to date | |
436 | * info, depending on which capabilities are held, and whether | |
437 | * time_warp_seq or truncate_seq have increased. (Ordinarily, mtime | |
438 | * and size are monotonically increasing, except when utimes() or | |
439 | * truncate() increments the corresponding _seq values.) | |
440 | */ | |
441 | int ceph_fill_file_size(struct inode *inode, int issued, | |
442 | u32 truncate_seq, u64 truncate_size, u64 size) | |
443 | { | |
444 | struct ceph_inode_info *ci = ceph_inode(inode); | |
445 | int queue_trunc = 0; | |
446 | ||
447 | if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) > 0 || | |
448 | (truncate_seq == ci->i_truncate_seq && size > inode->i_size)) { | |
449 | dout("size %lld -> %llu\n", inode->i_size, size); | |
450 | inode->i_size = size; | |
451 | inode->i_blocks = (size + (1<<9) - 1) >> 9; | |
452 | ci->i_reported_size = size; | |
453 | if (truncate_seq != ci->i_truncate_seq) { | |
454 | dout("truncate_seq %u -> %u\n", | |
455 | ci->i_truncate_seq, truncate_seq); | |
456 | ci->i_truncate_seq = truncate_seq; | |
3d497d85 YS |
457 | /* |
458 | * If we hold relevant caps, or in the case where we're | |
459 | * not the only client referencing this file and we | |
460 | * don't hold those caps, then we need to check whether | |
461 | * the file is either opened or mmaped | |
462 | */ | |
463 | if ((issued & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_RD| | |
2962507c SW |
464 | CEPH_CAP_FILE_WR|CEPH_CAP_FILE_BUFFER| |
465 | CEPH_CAP_FILE_EXCL| | |
466 | CEPH_CAP_FILE_LAZYIO)) || | |
3d497d85 YS |
467 | mapping_mapped(inode->i_mapping) || |
468 | __ceph_caps_file_wanted(ci)) { | |
355da1eb SW |
469 | ci->i_truncate_pending++; |
470 | queue_trunc = 1; | |
471 | } | |
472 | } | |
473 | } | |
474 | if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) >= 0 && | |
475 | ci->i_truncate_size != truncate_size) { | |
476 | dout("truncate_size %lld -> %llu\n", ci->i_truncate_size, | |
477 | truncate_size); | |
478 | ci->i_truncate_size = truncate_size; | |
479 | } | |
480 | return queue_trunc; | |
481 | } | |
482 | ||
483 | void ceph_fill_file_time(struct inode *inode, int issued, | |
484 | u64 time_warp_seq, struct timespec *ctime, | |
485 | struct timespec *mtime, struct timespec *atime) | |
486 | { | |
487 | struct ceph_inode_info *ci = ceph_inode(inode); | |
488 | int warn = 0; | |
489 | ||
490 | if (issued & (CEPH_CAP_FILE_EXCL| | |
491 | CEPH_CAP_FILE_WR| | |
d8672d64 SW |
492 | CEPH_CAP_FILE_BUFFER| |
493 | CEPH_CAP_AUTH_EXCL| | |
494 | CEPH_CAP_XATTR_EXCL)) { | |
355da1eb SW |
495 | if (timespec_compare(ctime, &inode->i_ctime) > 0) { |
496 | dout("ctime %ld.%09ld -> %ld.%09ld inc w/ cap\n", | |
497 | inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec, | |
498 | ctime->tv_sec, ctime->tv_nsec); | |
499 | inode->i_ctime = *ctime; | |
500 | } | |
501 | if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) > 0) { | |
502 | /* the MDS did a utimes() */ | |
503 | dout("mtime %ld.%09ld -> %ld.%09ld " | |
504 | "tw %d -> %d\n", | |
505 | inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec, | |
506 | mtime->tv_sec, mtime->tv_nsec, | |
507 | ci->i_time_warp_seq, (int)time_warp_seq); | |
508 | ||
509 | inode->i_mtime = *mtime; | |
510 | inode->i_atime = *atime; | |
511 | ci->i_time_warp_seq = time_warp_seq; | |
512 | } else if (time_warp_seq == ci->i_time_warp_seq) { | |
513 | /* nobody did utimes(); take the max */ | |
514 | if (timespec_compare(mtime, &inode->i_mtime) > 0) { | |
515 | dout("mtime %ld.%09ld -> %ld.%09ld inc\n", | |
516 | inode->i_mtime.tv_sec, | |
517 | inode->i_mtime.tv_nsec, | |
518 | mtime->tv_sec, mtime->tv_nsec); | |
519 | inode->i_mtime = *mtime; | |
520 | } | |
521 | if (timespec_compare(atime, &inode->i_atime) > 0) { | |
522 | dout("atime %ld.%09ld -> %ld.%09ld inc\n", | |
523 | inode->i_atime.tv_sec, | |
524 | inode->i_atime.tv_nsec, | |
525 | atime->tv_sec, atime->tv_nsec); | |
526 | inode->i_atime = *atime; | |
527 | } | |
528 | } else if (issued & CEPH_CAP_FILE_EXCL) { | |
529 | /* we did a utimes(); ignore mds values */ | |
530 | } else { | |
531 | warn = 1; | |
532 | } | |
533 | } else { | |
d8672d64 | 534 | /* we have no write|excl caps; whatever the MDS says is true */ |
355da1eb SW |
535 | if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) >= 0) { |
536 | inode->i_ctime = *ctime; | |
537 | inode->i_mtime = *mtime; | |
538 | inode->i_atime = *atime; | |
539 | ci->i_time_warp_seq = time_warp_seq; | |
540 | } else { | |
541 | warn = 1; | |
542 | } | |
543 | } | |
544 | if (warn) /* time_warp_seq shouldn't go backwards */ | |
545 | dout("%p mds time_warp_seq %llu < %u\n", | |
546 | inode, time_warp_seq, ci->i_time_warp_seq); | |
547 | } | |
548 | ||
549 | /* | |
550 | * Populate an inode based on info from mds. May be called on new or | |
551 | * existing inodes. | |
552 | */ | |
553 | static int fill_inode(struct inode *inode, | |
554 | struct ceph_mds_reply_info_in *iinfo, | |
555 | struct ceph_mds_reply_dirfrag *dirinfo, | |
556 | struct ceph_mds_session *session, | |
557 | unsigned long ttl_from, int cap_fmode, | |
558 | struct ceph_cap_reservation *caps_reservation) | |
559 | { | |
560 | struct ceph_mds_reply_inode *info = iinfo->in; | |
561 | struct ceph_inode_info *ci = ceph_inode(inode); | |
562 | int i; | |
563 | int issued, implemented; | |
564 | struct timespec mtime, atime, ctime; | |
565 | u32 nsplits; | |
566 | struct ceph_buffer *xattr_blob = NULL; | |
567 | int err = 0; | |
568 | int queue_trunc = 0; | |
569 | ||
570 | dout("fill_inode %p ino %llx.%llx v %llu had %llu\n", | |
571 | inode, ceph_vinop(inode), le64_to_cpu(info->version), | |
572 | ci->i_version); | |
573 | ||
574 | /* | |
575 | * prealloc xattr data, if it looks like we'll need it. only | |
576 | * if len > 4 (meaning there are actually xattrs; the first 4 | |
577 | * bytes are the xattr count). | |
578 | */ | |
579 | if (iinfo->xattr_len > 4) { | |
b6c1d5b8 | 580 | xattr_blob = ceph_buffer_new(iinfo->xattr_len, GFP_NOFS); |
355da1eb SW |
581 | if (!xattr_blob) |
582 | pr_err("fill_inode ENOMEM xattr blob %d bytes\n", | |
583 | iinfo->xattr_len); | |
584 | } | |
585 | ||
586 | spin_lock(&inode->i_lock); | |
587 | ||
588 | /* | |
589 | * provided version will be odd if inode value is projected, | |
8bd59e01 SW |
590 | * even if stable. skip the update if we have newer stable |
591 | * info (ours>=theirs, e.g. due to racing mds replies), unless | |
592 | * we are getting projected (unstable) info (in which case the | |
593 | * version is odd, and we want ours>theirs). | |
594 | * us them | |
595 | * 2 2 skip | |
596 | * 3 2 skip | |
597 | * 3 3 update | |
355da1eb SW |
598 | */ |
599 | if (le64_to_cpu(info->version) > 0 && | |
8bd59e01 | 600 | (ci->i_version & ~1) >= le64_to_cpu(info->version)) |
355da1eb SW |
601 | goto no_change; |
602 | ||
603 | issued = __ceph_caps_issued(ci, &implemented); | |
604 | issued |= implemented | __ceph_caps_dirty(ci); | |
605 | ||
606 | /* update inode */ | |
607 | ci->i_version = le64_to_cpu(info->version); | |
608 | inode->i_version++; | |
609 | inode->i_rdev = le32_to_cpu(info->rdev); | |
610 | ||
611 | if ((issued & CEPH_CAP_AUTH_EXCL) == 0) { | |
612 | inode->i_mode = le32_to_cpu(info->mode); | |
613 | inode->i_uid = le32_to_cpu(info->uid); | |
614 | inode->i_gid = le32_to_cpu(info->gid); | |
615 | dout("%p mode 0%o uid.gid %d.%d\n", inode, inode->i_mode, | |
616 | inode->i_uid, inode->i_gid); | |
617 | } | |
618 | ||
619 | if ((issued & CEPH_CAP_LINK_EXCL) == 0) | |
620 | inode->i_nlink = le32_to_cpu(info->nlink); | |
621 | ||
622 | /* be careful with mtime, atime, size */ | |
623 | ceph_decode_timespec(&atime, &info->atime); | |
624 | ceph_decode_timespec(&mtime, &info->mtime); | |
625 | ceph_decode_timespec(&ctime, &info->ctime); | |
626 | queue_trunc = ceph_fill_file_size(inode, issued, | |
627 | le32_to_cpu(info->truncate_seq), | |
628 | le64_to_cpu(info->truncate_size), | |
355da1eb SW |
629 | le64_to_cpu(info->size)); |
630 | ceph_fill_file_time(inode, issued, | |
631 | le32_to_cpu(info->time_warp_seq), | |
632 | &ctime, &mtime, &atime); | |
633 | ||
912a9b03 SW |
634 | /* only update max_size on auth cap */ |
635 | if ((info->cap.flags & CEPH_CAP_FLAG_AUTH) && | |
636 | ci->i_max_size != le64_to_cpu(info->max_size)) { | |
637 | dout("max_size %lld -> %llu\n", ci->i_max_size, | |
638 | le64_to_cpu(info->max_size)); | |
639 | ci->i_max_size = le64_to_cpu(info->max_size); | |
640 | } | |
641 | ||
355da1eb SW |
642 | ci->i_layout = info->layout; |
643 | inode->i_blkbits = fls(le32_to_cpu(info->layout.fl_stripe_unit)) - 1; | |
644 | ||
645 | /* xattrs */ | |
646 | /* note that if i_xattrs.len <= 4, i_xattrs.data will still be NULL. */ | |
647 | if ((issued & CEPH_CAP_XATTR_EXCL) == 0 && | |
648 | le64_to_cpu(info->xattr_version) > ci->i_xattrs.version) { | |
649 | if (ci->i_xattrs.blob) | |
650 | ceph_buffer_put(ci->i_xattrs.blob); | |
651 | ci->i_xattrs.blob = xattr_blob; | |
652 | if (xattr_blob) | |
653 | memcpy(ci->i_xattrs.blob->vec.iov_base, | |
654 | iinfo->xattr_data, iinfo->xattr_len); | |
655 | ci->i_xattrs.version = le64_to_cpu(info->xattr_version); | |
a6424e48 | 656 | xattr_blob = NULL; |
355da1eb SW |
657 | } |
658 | ||
659 | inode->i_mapping->a_ops = &ceph_aops; | |
660 | inode->i_mapping->backing_dev_info = | |
640ef79d | 661 | &ceph_sb_to_client(inode->i_sb)->backing_dev_info; |
355da1eb SW |
662 | |
663 | switch (inode->i_mode & S_IFMT) { | |
664 | case S_IFIFO: | |
665 | case S_IFBLK: | |
666 | case S_IFCHR: | |
667 | case S_IFSOCK: | |
668 | init_special_inode(inode, inode->i_mode, inode->i_rdev); | |
669 | inode->i_op = &ceph_file_iops; | |
670 | break; | |
671 | case S_IFREG: | |
672 | inode->i_op = &ceph_file_iops; | |
673 | inode->i_fop = &ceph_file_fops; | |
674 | break; | |
675 | case S_IFLNK: | |
676 | inode->i_op = &ceph_symlink_iops; | |
677 | if (!ci->i_symlink) { | |
678 | int symlen = iinfo->symlink_len; | |
679 | char *sym; | |
680 | ||
681 | BUG_ON(symlen != inode->i_size); | |
682 | spin_unlock(&inode->i_lock); | |
683 | ||
684 | err = -ENOMEM; | |
685 | sym = kmalloc(symlen+1, GFP_NOFS); | |
686 | if (!sym) | |
687 | goto out; | |
688 | memcpy(sym, iinfo->symlink, symlen); | |
689 | sym[symlen] = 0; | |
690 | ||
691 | spin_lock(&inode->i_lock); | |
692 | if (!ci->i_symlink) | |
693 | ci->i_symlink = sym; | |
694 | else | |
695 | kfree(sym); /* lost a race */ | |
696 | } | |
697 | break; | |
698 | case S_IFDIR: | |
699 | inode->i_op = &ceph_dir_iops; | |
700 | inode->i_fop = &ceph_dir_fops; | |
701 | ||
14303d20 SW |
702 | ci->i_dir_layout = iinfo->dir_layout; |
703 | ||
355da1eb SW |
704 | ci->i_files = le64_to_cpu(info->files); |
705 | ci->i_subdirs = le64_to_cpu(info->subdirs); | |
706 | ci->i_rbytes = le64_to_cpu(info->rbytes); | |
707 | ci->i_rfiles = le64_to_cpu(info->rfiles); | |
708 | ci->i_rsubdirs = le64_to_cpu(info->rsubdirs); | |
709 | ceph_decode_timespec(&ci->i_rctime, &info->rctime); | |
710 | ||
711 | /* set dir completion flag? */ | |
712 | if (ci->i_files == 0 && ci->i_subdirs == 0 && | |
713 | ceph_snap(inode) == CEPH_NOSNAP && | |
1b7facc4 | 714 | (le32_to_cpu(info->cap.caps) & CEPH_CAP_FILE_SHARED) && |
12451491 | 715 | (issued & CEPH_CAP_FILE_EXCL) == 0 && |
1b7facc4 | 716 | (ci->i_ceph_flags & CEPH_I_COMPLETE) == 0) { |
355da1eb | 717 | dout(" marking %p complete (empty)\n", inode); |
b545cc15 | 718 | /* ci->i_ceph_flags |= CEPH_I_COMPLETE; */ |
355da1eb SW |
719 | ci->i_max_offset = 2; |
720 | } | |
355da1eb SW |
721 | break; |
722 | default: | |
723 | pr_err("fill_inode %llx.%llx BAD mode 0%o\n", | |
724 | ceph_vinop(inode), inode->i_mode); | |
725 | } | |
726 | ||
727 | no_change: | |
728 | spin_unlock(&inode->i_lock); | |
729 | ||
730 | /* queue truncate if we saw i_size decrease */ | |
731 | if (queue_trunc) | |
3c6f6b79 | 732 | ceph_queue_vmtruncate(inode); |
355da1eb SW |
733 | |
734 | /* populate frag tree */ | |
735 | /* FIXME: move me up, if/when version reflects fragtree changes */ | |
736 | nsplits = le32_to_cpu(info->fragtree.nsplits); | |
737 | mutex_lock(&ci->i_fragtree_mutex); | |
738 | for (i = 0; i < nsplits; i++) { | |
739 | u32 id = le32_to_cpu(info->fragtree.splits[i].frag); | |
740 | struct ceph_inode_frag *frag = __get_or_create_frag(ci, id); | |
741 | ||
742 | if (IS_ERR(frag)) | |
743 | continue; | |
744 | frag->split_by = le32_to_cpu(info->fragtree.splits[i].by); | |
745 | dout(" frag %x split by %d\n", frag->frag, frag->split_by); | |
746 | } | |
747 | mutex_unlock(&ci->i_fragtree_mutex); | |
748 | ||
749 | /* were we issued a capability? */ | |
750 | if (info->cap.caps) { | |
751 | if (ceph_snap(inode) == CEPH_NOSNAP) { | |
752 | ceph_add_cap(inode, session, | |
753 | le64_to_cpu(info->cap.cap_id), | |
754 | cap_fmode, | |
755 | le32_to_cpu(info->cap.caps), | |
756 | le32_to_cpu(info->cap.wanted), | |
757 | le32_to_cpu(info->cap.seq), | |
758 | le32_to_cpu(info->cap.mseq), | |
759 | le64_to_cpu(info->cap.realm), | |
760 | info->cap.flags, | |
761 | caps_reservation); | |
762 | } else { | |
763 | spin_lock(&inode->i_lock); | |
764 | dout(" %p got snap_caps %s\n", inode, | |
765 | ceph_cap_string(le32_to_cpu(info->cap.caps))); | |
766 | ci->i_snap_caps |= le32_to_cpu(info->cap.caps); | |
767 | if (cap_fmode >= 0) | |
768 | __ceph_get_fmode(ci, cap_fmode); | |
769 | spin_unlock(&inode->i_lock); | |
770 | } | |
04d000eb SW |
771 | } else if (cap_fmode >= 0) { |
772 | pr_warning("mds issued no caps on %llx.%llx\n", | |
773 | ceph_vinop(inode)); | |
774 | __ceph_get_fmode(ci, cap_fmode); | |
355da1eb SW |
775 | } |
776 | ||
777 | /* update delegation info? */ | |
778 | if (dirinfo) | |
779 | ceph_fill_dirfrag(inode, dirinfo); | |
780 | ||
781 | err = 0; | |
782 | ||
783 | out: | |
b6c1d5b8 SW |
784 | if (xattr_blob) |
785 | ceph_buffer_put(xattr_blob); | |
355da1eb SW |
786 | return err; |
787 | } | |
788 | ||
789 | /* | |
790 | * caller should hold session s_mutex. | |
791 | */ | |
792 | static void update_dentry_lease(struct dentry *dentry, | |
793 | struct ceph_mds_reply_lease *lease, | |
794 | struct ceph_mds_session *session, | |
795 | unsigned long from_time) | |
796 | { | |
797 | struct ceph_dentry_info *di = ceph_dentry(dentry); | |
798 | long unsigned duration = le32_to_cpu(lease->duration_ms); | |
799 | long unsigned ttl = from_time + (duration * HZ) / 1000; | |
800 | long unsigned half_ttl = from_time + (duration * HZ / 2) / 1000; | |
801 | struct inode *dir; | |
802 | ||
803 | /* only track leases on regular dentries */ | |
804 | if (dentry->d_op != &ceph_dentry_ops) | |
805 | return; | |
806 | ||
807 | spin_lock(&dentry->d_lock); | |
808 | dout("update_dentry_lease %p mask %d duration %lu ms ttl %lu\n", | |
809 | dentry, le16_to_cpu(lease->mask), duration, ttl); | |
810 | ||
811 | /* make lease_rdcache_gen match directory */ | |
812 | dir = dentry->d_parent->d_inode; | |
813 | di->lease_shared_gen = ceph_inode(dir)->i_shared_gen; | |
814 | ||
815 | if (lease->mask == 0) | |
816 | goto out_unlock; | |
817 | ||
818 | if (di->lease_gen == session->s_cap_gen && | |
819 | time_before(ttl, dentry->d_time)) | |
820 | goto out_unlock; /* we already have a newer lease. */ | |
821 | ||
822 | if (di->lease_session && di->lease_session != session) | |
823 | goto out_unlock; | |
824 | ||
825 | ceph_dentry_lru_touch(dentry); | |
826 | ||
827 | if (!di->lease_session) | |
828 | di->lease_session = ceph_get_mds_session(session); | |
829 | di->lease_gen = session->s_cap_gen; | |
830 | di->lease_seq = le32_to_cpu(lease->seq); | |
831 | di->lease_renew_after = half_ttl; | |
832 | di->lease_renew_from = 0; | |
833 | dentry->d_time = ttl; | |
834 | out_unlock: | |
835 | spin_unlock(&dentry->d_lock); | |
836 | return; | |
837 | } | |
838 | ||
1cd3935b SW |
839 | /* |
840 | * Set dentry's directory position based on the current dir's max, and | |
841 | * order it in d_subdirs, so that dcache_readdir behaves. | |
842 | */ | |
843 | static void ceph_set_dentry_offset(struct dentry *dn) | |
844 | { | |
845 | struct dentry *dir = dn->d_parent; | |
846 | struct inode *inode = dn->d_parent->d_inode; | |
847 | struct ceph_dentry_info *di; | |
848 | ||
849 | BUG_ON(!inode); | |
850 | ||
851 | di = ceph_dentry(dn); | |
852 | ||
853 | spin_lock(&inode->i_lock); | |
854 | if ((ceph_inode(inode)->i_ceph_flags & CEPH_I_COMPLETE) == 0) { | |
855 | spin_unlock(&inode->i_lock); | |
856 | return; | |
857 | } | |
858 | di->offset = ceph_inode(inode)->i_max_offset++; | |
859 | spin_unlock(&inode->i_lock); | |
860 | ||
2fd6b7f5 NP |
861 | spin_lock(&dir->d_lock); |
862 | spin_lock_nested(&dn->d_lock, DENTRY_D_LOCK_NESTED); | |
13a4214c | 863 | list_move(&dn->d_u.d_child, &dir->d_subdirs); |
1cd3935b SW |
864 | dout("set_dentry_offset %p %lld (%p %p)\n", dn, di->offset, |
865 | dn->d_u.d_child.prev, dn->d_u.d_child.next); | |
866 | spin_unlock(&dn->d_lock); | |
2fd6b7f5 | 867 | spin_unlock(&dir->d_lock); |
1cd3935b SW |
868 | } |
869 | ||
355da1eb SW |
870 | /* |
871 | * splice a dentry to an inode. | |
872 | * caller must hold directory i_mutex for this to be safe. | |
873 | * | |
874 | * we will only rehash the resulting dentry if @prehash is | |
875 | * true; @prehash will be set to false (for the benefit of | |
876 | * the caller) if we fail. | |
877 | */ | |
878 | static struct dentry *splice_dentry(struct dentry *dn, struct inode *in, | |
467c5251 | 879 | bool *prehash, bool set_offset) |
355da1eb SW |
880 | { |
881 | struct dentry *realdn; | |
882 | ||
1cd3935b SW |
883 | BUG_ON(dn->d_inode); |
884 | ||
355da1eb SW |
885 | /* dn must be unhashed */ |
886 | if (!d_unhashed(dn)) | |
887 | d_drop(dn); | |
888 | realdn = d_materialise_unique(dn, in); | |
889 | if (IS_ERR(realdn)) { | |
d69ed05a SW |
890 | pr_err("splice_dentry error %ld %p inode %p ino %llx.%llx\n", |
891 | PTR_ERR(realdn), dn, in, ceph_vinop(in)); | |
355da1eb SW |
892 | if (prehash) |
893 | *prehash = false; /* don't rehash on error */ | |
894 | dn = realdn; /* note realdn contains the error */ | |
895 | goto out; | |
896 | } else if (realdn) { | |
897 | dout("dn %p (%d) spliced with %p (%d) " | |
898 | "inode %p ino %llx.%llx\n", | |
b7ab39f6 NP |
899 | dn, dn->d_count, |
900 | realdn, realdn->d_count, | |
355da1eb SW |
901 | realdn->d_inode, ceph_vinop(realdn->d_inode)); |
902 | dput(dn); | |
903 | dn = realdn; | |
904 | } else { | |
905 | BUG_ON(!ceph_dentry(dn)); | |
355da1eb SW |
906 | dout("dn %p attached to %p ino %llx.%llx\n", |
907 | dn, dn->d_inode, ceph_vinop(dn->d_inode)); | |
908 | } | |
909 | if ((!prehash || *prehash) && d_unhashed(dn)) | |
910 | d_rehash(dn); | |
467c5251 SW |
911 | if (set_offset) |
912 | ceph_set_dentry_offset(dn); | |
355da1eb SW |
913 | out: |
914 | return dn; | |
915 | } | |
916 | ||
917 | /* | |
918 | * Incorporate results into the local cache. This is either just | |
919 | * one inode, or a directory, dentry, and possibly linked-to inode (e.g., | |
920 | * after a lookup). | |
921 | * | |
922 | * A reply may contain | |
923 | * a directory inode along with a dentry. | |
924 | * and/or a target inode | |
925 | * | |
926 | * Called with snap_rwsem (read). | |
927 | */ | |
928 | int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req, | |
929 | struct ceph_mds_session *session) | |
930 | { | |
931 | struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; | |
932 | struct inode *in = NULL; | |
933 | struct ceph_mds_reply_inode *ininfo; | |
934 | struct ceph_vino vino; | |
3d14c5d2 | 935 | struct ceph_fs_client *fsc = ceph_sb_to_client(sb); |
355da1eb SW |
936 | int i = 0; |
937 | int err = 0; | |
938 | ||
939 | dout("fill_trace %p is_dentry %d is_target %d\n", req, | |
940 | rinfo->head->is_dentry, rinfo->head->is_target); | |
941 | ||
942 | #if 0 | |
943 | /* | |
944 | * Debugging hook: | |
945 | * | |
946 | * If we resend completed ops to a recovering mds, we get no | |
947 | * trace. Since that is very rare, pretend this is the case | |
948 | * to ensure the 'no trace' handlers in the callers behave. | |
949 | * | |
950 | * Fill in inodes unconditionally to avoid breaking cap | |
951 | * invariants. | |
952 | */ | |
953 | if (rinfo->head->op & CEPH_MDS_OP_WRITE) { | |
954 | pr_info("fill_trace faking empty trace on %lld %s\n", | |
955 | req->r_tid, ceph_mds_op_name(rinfo->head->op)); | |
956 | if (rinfo->head->is_dentry) { | |
957 | rinfo->head->is_dentry = 0; | |
958 | err = fill_inode(req->r_locked_dir, | |
959 | &rinfo->diri, rinfo->dirfrag, | |
960 | session, req->r_request_started, -1); | |
961 | } | |
962 | if (rinfo->head->is_target) { | |
963 | rinfo->head->is_target = 0; | |
964 | ininfo = rinfo->targeti.in; | |
965 | vino.ino = le64_to_cpu(ininfo->ino); | |
966 | vino.snap = le64_to_cpu(ininfo->snapid); | |
967 | in = ceph_get_inode(sb, vino); | |
968 | err = fill_inode(in, &rinfo->targeti, NULL, | |
969 | session, req->r_request_started, | |
970 | req->r_fmode); | |
971 | iput(in); | |
972 | } | |
973 | } | |
974 | #endif | |
975 | ||
976 | if (!rinfo->head->is_target && !rinfo->head->is_dentry) { | |
977 | dout("fill_trace reply is empty!\n"); | |
167c9e35 SW |
978 | if (rinfo->head->result == 0 && req->r_locked_dir) |
979 | ceph_invalidate_dir_request(req); | |
355da1eb SW |
980 | return 0; |
981 | } | |
982 | ||
983 | if (rinfo->head->is_dentry) { | |
5b1daecd SW |
984 | struct inode *dir = req->r_locked_dir; |
985 | ||
986 | err = fill_inode(dir, &rinfo->diri, rinfo->dirfrag, | |
987 | session, req->r_request_started, -1, | |
988 | &req->r_caps_reservation); | |
989 | if (err < 0) | |
990 | return err; | |
991 | } | |
992 | ||
9358c6d4 SW |
993 | /* |
994 | * ignore null lease/binding on snapdir ENOENT, or else we | |
995 | * will have trouble splicing in the virtual snapdir later | |
996 | */ | |
997 | if (rinfo->head->is_dentry && !req->r_aborted && | |
998 | (rinfo->head->is_target || strncmp(req->r_dentry->d_name.name, | |
3d14c5d2 | 999 | fsc->mount_options->snapdir_name, |
9358c6d4 | 1000 | req->r_dentry->d_name.len))) { |
355da1eb SW |
1001 | /* |
1002 | * lookup link rename : null -> possibly existing inode | |
1003 | * mknod symlink mkdir : null -> new inode | |
1004 | * unlink : linked -> null | |
1005 | */ | |
1006 | struct inode *dir = req->r_locked_dir; | |
1007 | struct dentry *dn = req->r_dentry; | |
1008 | bool have_dir_cap, have_lease; | |
1009 | ||
1010 | BUG_ON(!dn); | |
1011 | BUG_ON(!dir); | |
1012 | BUG_ON(dn->d_parent->d_inode != dir); | |
1013 | BUG_ON(ceph_ino(dir) != | |
1014 | le64_to_cpu(rinfo->diri.in->ino)); | |
1015 | BUG_ON(ceph_snap(dir) != | |
1016 | le64_to_cpu(rinfo->diri.in->snapid)); | |
1017 | ||
355da1eb SW |
1018 | /* do we have a lease on the whole dir? */ |
1019 | have_dir_cap = | |
1020 | (le32_to_cpu(rinfo->diri.in->cap.caps) & | |
1021 | CEPH_CAP_FILE_SHARED); | |
1022 | ||
1023 | /* do we have a dn lease? */ | |
1024 | have_lease = have_dir_cap || | |
1025 | (le16_to_cpu(rinfo->dlease->mask) & | |
1026 | CEPH_LOCK_DN); | |
1027 | ||
1028 | if (!have_lease) | |
1029 | dout("fill_trace no dentry lease or dir cap\n"); | |
1030 | ||
1031 | /* rename? */ | |
1032 | if (req->r_old_dentry && req->r_op == CEPH_MDS_OP_RENAME) { | |
1033 | dout(" src %p '%.*s' dst %p '%.*s'\n", | |
1034 | req->r_old_dentry, | |
1035 | req->r_old_dentry->d_name.len, | |
1036 | req->r_old_dentry->d_name.name, | |
1037 | dn, dn->d_name.len, dn->d_name.name); | |
1038 | dout("fill_trace doing d_move %p -> %p\n", | |
1039 | req->r_old_dentry, dn); | |
c10f5e12 | 1040 | |
355da1eb SW |
1041 | d_move(req->r_old_dentry, dn); |
1042 | dout(" src %p '%.*s' dst %p '%.*s'\n", | |
1043 | req->r_old_dentry, | |
1044 | req->r_old_dentry->d_name.len, | |
1045 | req->r_old_dentry->d_name.name, | |
1046 | dn, dn->d_name.len, dn->d_name.name); | |
81a6cf2d | 1047 | |
c4a29f26 SW |
1048 | /* ensure target dentry is invalidated, despite |
1049 | rehashing bug in vfs_rename_dir */ | |
81a6cf2d SW |
1050 | ceph_invalidate_dentry_lease(dn); |
1051 | ||
09adc80c SW |
1052 | /* |
1053 | * d_move() puts the renamed dentry at the end of | |
1054 | * d_subdirs. We need to assign it an appropriate | |
1055 | * directory offset so we can behave when holding | |
1056 | * I_COMPLETE. | |
1057 | */ | |
1058 | ceph_set_dentry_offset(req->r_old_dentry); | |
1059 | dout("dn %p gets new offset %lld\n", req->r_old_dentry, | |
1cd3935b | 1060 | ceph_dentry(req->r_old_dentry)->offset); |
81a6cf2d | 1061 | |
355da1eb SW |
1062 | dn = req->r_old_dentry; /* use old_dentry */ |
1063 | in = dn->d_inode; | |
1064 | } | |
1065 | ||
1066 | /* null dentry? */ | |
1067 | if (!rinfo->head->is_target) { | |
1068 | dout("fill_trace null dentry\n"); | |
1069 | if (dn->d_inode) { | |
1070 | dout("d_delete %p\n", dn); | |
1071 | d_delete(dn); | |
1072 | } else { | |
1073 | dout("d_instantiate %p NULL\n", dn); | |
1074 | d_instantiate(dn, NULL); | |
1075 | if (have_lease && d_unhashed(dn)) | |
1076 | d_rehash(dn); | |
1077 | update_dentry_lease(dn, rinfo->dlease, | |
1078 | session, | |
1079 | req->r_request_started); | |
1080 | } | |
1081 | goto done; | |
1082 | } | |
1083 | ||
1084 | /* attach proper inode */ | |
1085 | ininfo = rinfo->targeti.in; | |
1086 | vino.ino = le64_to_cpu(ininfo->ino); | |
1087 | vino.snap = le64_to_cpu(ininfo->snapid); | |
d8b16b3d SW |
1088 | in = dn->d_inode; |
1089 | if (!in) { | |
355da1eb SW |
1090 | in = ceph_get_inode(sb, vino); |
1091 | if (IS_ERR(in)) { | |
1092 | pr_err("fill_trace bad get_inode " | |
1093 | "%llx.%llx\n", vino.ino, vino.snap); | |
1094 | err = PTR_ERR(in); | |
1095 | d_delete(dn); | |
1096 | goto done; | |
1097 | } | |
467c5251 | 1098 | dn = splice_dentry(dn, in, &have_lease, true); |
355da1eb SW |
1099 | if (IS_ERR(dn)) { |
1100 | err = PTR_ERR(dn); | |
1101 | goto done; | |
1102 | } | |
1103 | req->r_dentry = dn; /* may have spliced */ | |
70b666c3 | 1104 | ihold(in); |
355da1eb SW |
1105 | } else if (ceph_ino(in) == vino.ino && |
1106 | ceph_snap(in) == vino.snap) { | |
70b666c3 | 1107 | ihold(in); |
355da1eb SW |
1108 | } else { |
1109 | dout(" %p links to %p %llx.%llx, not %llx.%llx\n", | |
1110 | dn, in, ceph_ino(in), ceph_snap(in), | |
1111 | vino.ino, vino.snap); | |
1112 | have_lease = false; | |
1113 | in = NULL; | |
1114 | } | |
1115 | ||
1116 | if (have_lease) | |
1117 | update_dentry_lease(dn, rinfo->dlease, session, | |
1118 | req->r_request_started); | |
1119 | dout(" final dn %p\n", dn); | |
1120 | i++; | |
1121 | } else if (req->r_op == CEPH_MDS_OP_LOOKUPSNAP || | |
1122 | req->r_op == CEPH_MDS_OP_MKSNAP) { | |
1123 | struct dentry *dn = req->r_dentry; | |
1124 | ||
1125 | /* fill out a snapdir LOOKUPSNAP dentry */ | |
1126 | BUG_ON(!dn); | |
1127 | BUG_ON(!req->r_locked_dir); | |
1128 | BUG_ON(ceph_snap(req->r_locked_dir) != CEPH_SNAPDIR); | |
1129 | ininfo = rinfo->targeti.in; | |
1130 | vino.ino = le64_to_cpu(ininfo->ino); | |
1131 | vino.snap = le64_to_cpu(ininfo->snapid); | |
1132 | in = ceph_get_inode(sb, vino); | |
1133 | if (IS_ERR(in)) { | |
1134 | pr_err("fill_inode get_inode badness %llx.%llx\n", | |
1135 | vino.ino, vino.snap); | |
1136 | err = PTR_ERR(in); | |
1137 | d_delete(dn); | |
1138 | goto done; | |
1139 | } | |
1140 | dout(" linking snapped dir %p to dn %p\n", in, dn); | |
467c5251 | 1141 | dn = splice_dentry(dn, in, NULL, true); |
355da1eb SW |
1142 | if (IS_ERR(dn)) { |
1143 | err = PTR_ERR(dn); | |
1144 | goto done; | |
1145 | } | |
1146 | req->r_dentry = dn; /* may have spliced */ | |
70b666c3 | 1147 | ihold(in); |
355da1eb SW |
1148 | rinfo->head->is_dentry = 1; /* fool notrace handlers */ |
1149 | } | |
1150 | ||
1151 | if (rinfo->head->is_target) { | |
1152 | vino.ino = le64_to_cpu(rinfo->targeti.in->ino); | |
1153 | vino.snap = le64_to_cpu(rinfo->targeti.in->snapid); | |
1154 | ||
1155 | if (in == NULL || ceph_ino(in) != vino.ino || | |
1156 | ceph_snap(in) != vino.snap) { | |
1157 | in = ceph_get_inode(sb, vino); | |
1158 | if (IS_ERR(in)) { | |
1159 | err = PTR_ERR(in); | |
1160 | goto done; | |
1161 | } | |
1162 | } | |
1163 | req->r_target_inode = in; | |
1164 | ||
1165 | err = fill_inode(in, | |
1166 | &rinfo->targeti, NULL, | |
1167 | session, req->r_request_started, | |
1168 | (le32_to_cpu(rinfo->head->result) == 0) ? | |
1169 | req->r_fmode : -1, | |
1170 | &req->r_caps_reservation); | |
1171 | if (err < 0) { | |
1172 | pr_err("fill_inode badness %p %llx.%llx\n", | |
1173 | in, ceph_vinop(in)); | |
1174 | goto done; | |
1175 | } | |
1176 | } | |
1177 | ||
1178 | done: | |
1179 | dout("fill_trace done err=%d\n", err); | |
1180 | return err; | |
1181 | } | |
1182 | ||
1183 | /* | |
1184 | * Prepopulate our cache with readdir results, leases, etc. | |
1185 | */ | |
1186 | int ceph_readdir_prepopulate(struct ceph_mds_request *req, | |
1187 | struct ceph_mds_session *session) | |
1188 | { | |
1189 | struct dentry *parent = req->r_dentry; | |
1190 | struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; | |
1191 | struct qstr dname; | |
1192 | struct dentry *dn; | |
1193 | struct inode *in; | |
1194 | int err = 0, i; | |
1195 | struct inode *snapdir = NULL; | |
1196 | struct ceph_mds_request_head *rhead = req->r_request->front.iov_base; | |
1197 | u64 frag = le32_to_cpu(rhead->args.readdir.frag); | |
1198 | struct ceph_dentry_info *di; | |
1199 | ||
1200 | if (le32_to_cpu(rinfo->head->op) == CEPH_MDS_OP_LSSNAP) { | |
1201 | snapdir = ceph_get_snapdir(parent->d_inode); | |
1202 | parent = d_find_alias(snapdir); | |
1203 | dout("readdir_prepopulate %d items under SNAPDIR dn %p\n", | |
1204 | rinfo->dir_nr, parent); | |
1205 | } else { | |
1206 | dout("readdir_prepopulate %d items under dn %p\n", | |
1207 | rinfo->dir_nr, parent); | |
1208 | if (rinfo->dir_dir) | |
1209 | ceph_fill_dirfrag(parent->d_inode, rinfo->dir_dir); | |
1210 | } | |
1211 | ||
1212 | for (i = 0; i < rinfo->dir_nr; i++) { | |
1213 | struct ceph_vino vino; | |
1214 | ||
1215 | dname.name = rinfo->dir_dname[i]; | |
1216 | dname.len = rinfo->dir_dname_len[i]; | |
1217 | dname.hash = full_name_hash(dname.name, dname.len); | |
1218 | ||
1219 | vino.ino = le64_to_cpu(rinfo->dir_in[i].in->ino); | |
1220 | vino.snap = le64_to_cpu(rinfo->dir_in[i].in->snapid); | |
1221 | ||
1222 | retry_lookup: | |
1223 | dn = d_lookup(parent, &dname); | |
1224 | dout("d_lookup on parent=%p name=%.*s got %p\n", | |
1225 | parent, dname.len, dname.name, dn); | |
1226 | ||
1227 | if (!dn) { | |
1228 | dn = d_alloc(parent, &dname); | |
1229 | dout("d_alloc %p '%.*s' = %p\n", parent, | |
1230 | dname.len, dname.name, dn); | |
1231 | if (dn == NULL) { | |
1232 | dout("d_alloc badness\n"); | |
1233 | err = -ENOMEM; | |
1234 | goto out; | |
1235 | } | |
1236 | err = ceph_init_dentry(dn); | |
8c696737 SW |
1237 | if (err < 0) { |
1238 | dput(dn); | |
355da1eb | 1239 | goto out; |
8c696737 | 1240 | } |
355da1eb SW |
1241 | } else if (dn->d_inode && |
1242 | (ceph_ino(dn->d_inode) != vino.ino || | |
1243 | ceph_snap(dn->d_inode) != vino.snap)) { | |
1244 | dout(" dn %p points to wrong inode %p\n", | |
1245 | dn, dn->d_inode); | |
1246 | d_delete(dn); | |
1247 | dput(dn); | |
1248 | goto retry_lookup; | |
1249 | } else { | |
1250 | /* reorder parent's d_subdirs */ | |
2fd6b7f5 NP |
1251 | spin_lock(&parent->d_lock); |
1252 | spin_lock_nested(&dn->d_lock, DENTRY_D_LOCK_NESTED); | |
355da1eb SW |
1253 | list_move(&dn->d_u.d_child, &parent->d_subdirs); |
1254 | spin_unlock(&dn->d_lock); | |
2fd6b7f5 | 1255 | spin_unlock(&parent->d_lock); |
355da1eb SW |
1256 | } |
1257 | ||
1258 | di = dn->d_fsdata; | |
1259 | di->offset = ceph_make_fpos(frag, i + req->r_readdir_offset); | |
1260 | ||
1261 | /* inode */ | |
1262 | if (dn->d_inode) { | |
1263 | in = dn->d_inode; | |
1264 | } else { | |
1265 | in = ceph_get_inode(parent->d_sb, vino); | |
ac1f12ef | 1266 | if (IS_ERR(in)) { |
355da1eb SW |
1267 | dout("new_inode badness\n"); |
1268 | d_delete(dn); | |
1269 | dput(dn); | |
ac1f12ef | 1270 | err = PTR_ERR(in); |
355da1eb SW |
1271 | goto out; |
1272 | } | |
467c5251 | 1273 | dn = splice_dentry(dn, in, NULL, false); |
d69ed05a SW |
1274 | if (IS_ERR(dn)) |
1275 | dn = NULL; | |
355da1eb SW |
1276 | } |
1277 | ||
1278 | if (fill_inode(in, &rinfo->dir_in[i], NULL, session, | |
1279 | req->r_request_started, -1, | |
1280 | &req->r_caps_reservation) < 0) { | |
1281 | pr_err("fill_inode badness on %p\n", in); | |
d69ed05a | 1282 | goto next_item; |
355da1eb | 1283 | } |
d69ed05a SW |
1284 | if (dn) |
1285 | update_dentry_lease(dn, rinfo->dir_dlease[i], | |
1286 | req->r_session, | |
1287 | req->r_request_started); | |
1288 | next_item: | |
1289 | if (dn) | |
1290 | dput(dn); | |
355da1eb SW |
1291 | } |
1292 | req->r_did_prepopulate = true; | |
1293 | ||
1294 | out: | |
1295 | if (snapdir) { | |
1296 | iput(snapdir); | |
1297 | dput(parent); | |
1298 | } | |
1299 | dout("readdir_prepopulate done\n"); | |
1300 | return err; | |
1301 | } | |
1302 | ||
1303 | int ceph_inode_set_size(struct inode *inode, loff_t size) | |
1304 | { | |
1305 | struct ceph_inode_info *ci = ceph_inode(inode); | |
1306 | int ret = 0; | |
1307 | ||
1308 | spin_lock(&inode->i_lock); | |
1309 | dout("set_size %p %llu -> %llu\n", inode, inode->i_size, size); | |
1310 | inode->i_size = size; | |
1311 | inode->i_blocks = (size + (1 << 9) - 1) >> 9; | |
1312 | ||
1313 | /* tell the MDS if we are approaching max_size */ | |
1314 | if ((size << 1) >= ci->i_max_size && | |
1315 | (ci->i_reported_size << 1) < ci->i_max_size) | |
1316 | ret = 1; | |
1317 | ||
1318 | spin_unlock(&inode->i_lock); | |
1319 | return ret; | |
1320 | } | |
1321 | ||
1322 | /* | |
1323 | * Write back inode data in a worker thread. (This can't be done | |
1324 | * in the message handler context.) | |
1325 | */ | |
3c6f6b79 SW |
1326 | void ceph_queue_writeback(struct inode *inode) |
1327 | { | |
1328 | if (queue_work(ceph_inode_to_client(inode)->wb_wq, | |
1329 | &ceph_inode(inode)->i_wb_work)) { | |
2c27c9a5 | 1330 | dout("ceph_queue_writeback %p\n", inode); |
70b666c3 | 1331 | ihold(inode); |
3c6f6b79 | 1332 | } else { |
2c27c9a5 | 1333 | dout("ceph_queue_writeback %p failed\n", inode); |
3c6f6b79 SW |
1334 | } |
1335 | } | |
1336 | ||
1337 | static void ceph_writeback_work(struct work_struct *work) | |
355da1eb SW |
1338 | { |
1339 | struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info, | |
1340 | i_wb_work); | |
1341 | struct inode *inode = &ci->vfs_inode; | |
1342 | ||
1343 | dout("writeback %p\n", inode); | |
1344 | filemap_fdatawrite(&inode->i_data); | |
1345 | iput(inode); | |
1346 | } | |
1347 | ||
3c6f6b79 SW |
1348 | /* |
1349 | * queue an async invalidation | |
1350 | */ | |
1351 | void ceph_queue_invalidate(struct inode *inode) | |
1352 | { | |
1353 | if (queue_work(ceph_inode_to_client(inode)->pg_inv_wq, | |
1354 | &ceph_inode(inode)->i_pg_inv_work)) { | |
1355 | dout("ceph_queue_invalidate %p\n", inode); | |
70b666c3 | 1356 | ihold(inode); |
3c6f6b79 SW |
1357 | } else { |
1358 | dout("ceph_queue_invalidate %p failed\n", inode); | |
1359 | } | |
1360 | } | |
1361 | ||
c9af9fb6 YS |
1362 | /* |
1363 | * invalidate any pages that are not dirty or under writeback. this | |
1364 | * includes pages that are clean and mapped. | |
1365 | */ | |
1366 | static void ceph_invalidate_nondirty_pages(struct address_space *mapping) | |
1367 | { | |
1368 | struct pagevec pvec; | |
1369 | pgoff_t next = 0; | |
1370 | int i; | |
1371 | ||
1372 | pagevec_init(&pvec, 0); | |
1373 | while (pagevec_lookup(&pvec, mapping, next, PAGEVEC_SIZE)) { | |
1374 | for (i = 0; i < pagevec_count(&pvec); i++) { | |
1375 | struct page *page = pvec.pages[i]; | |
1376 | pgoff_t index; | |
1377 | int skip_page = | |
1378 | (PageDirty(page) || PageWriteback(page)); | |
1379 | ||
1380 | if (!skip_page) | |
1381 | skip_page = !trylock_page(page); | |
1382 | ||
1383 | /* | |
1384 | * We really shouldn't be looking at the ->index of an | |
1385 | * unlocked page. But we're not allowed to lock these | |
1386 | * pages. So we rely upon nobody altering the ->index | |
1387 | * of this (pinned-by-us) page. | |
1388 | */ | |
1389 | index = page->index; | |
1390 | if (index > next) | |
1391 | next = index; | |
1392 | next++; | |
1393 | ||
1394 | if (skip_page) | |
1395 | continue; | |
1396 | ||
1397 | generic_error_remove_page(mapping, page); | |
1398 | unlock_page(page); | |
1399 | } | |
1400 | pagevec_release(&pvec); | |
1401 | cond_resched(); | |
1402 | } | |
1403 | } | |
1404 | ||
355da1eb SW |
1405 | /* |
1406 | * Invalidate inode pages in a worker thread. (This can't be done | |
1407 | * in the message handler context.) | |
1408 | */ | |
3c6f6b79 | 1409 | static void ceph_invalidate_work(struct work_struct *work) |
355da1eb SW |
1410 | { |
1411 | struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info, | |
1412 | i_pg_inv_work); | |
1413 | struct inode *inode = &ci->vfs_inode; | |
1414 | u32 orig_gen; | |
1415 | int check = 0; | |
1416 | ||
1417 | spin_lock(&inode->i_lock); | |
1418 | dout("invalidate_pages %p gen %d revoking %d\n", inode, | |
1419 | ci->i_rdcache_gen, ci->i_rdcache_revoking); | |
cd045cb4 | 1420 | if (ci->i_rdcache_revoking != ci->i_rdcache_gen) { |
355da1eb | 1421 | /* nevermind! */ |
355da1eb SW |
1422 | spin_unlock(&inode->i_lock); |
1423 | goto out; | |
1424 | } | |
1425 | orig_gen = ci->i_rdcache_gen; | |
1426 | spin_unlock(&inode->i_lock); | |
1427 | ||
c9af9fb6 | 1428 | ceph_invalidate_nondirty_pages(inode->i_mapping); |
355da1eb SW |
1429 | |
1430 | spin_lock(&inode->i_lock); | |
cd045cb4 SW |
1431 | if (orig_gen == ci->i_rdcache_gen && |
1432 | orig_gen == ci->i_rdcache_revoking) { | |
355da1eb SW |
1433 | dout("invalidate_pages %p gen %d successful\n", inode, |
1434 | ci->i_rdcache_gen); | |
cd045cb4 | 1435 | ci->i_rdcache_revoking--; |
355da1eb SW |
1436 | check = 1; |
1437 | } else { | |
cd045cb4 SW |
1438 | dout("invalidate_pages %p gen %d raced, now %d revoking %d\n", |
1439 | inode, orig_gen, ci->i_rdcache_gen, | |
1440 | ci->i_rdcache_revoking); | |
355da1eb SW |
1441 | } |
1442 | spin_unlock(&inode->i_lock); | |
1443 | ||
1444 | if (check) | |
1445 | ceph_check_caps(ci, 0, NULL); | |
1446 | out: | |
1447 | iput(inode); | |
1448 | } | |
1449 | ||
1450 | ||
1451 | /* | |
1452 | * called by trunc_wq; take i_mutex ourselves | |
1453 | * | |
1454 | * We also truncate in a separate thread as well. | |
1455 | */ | |
3c6f6b79 | 1456 | static void ceph_vmtruncate_work(struct work_struct *work) |
355da1eb SW |
1457 | { |
1458 | struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info, | |
1459 | i_vmtruncate_work); | |
1460 | struct inode *inode = &ci->vfs_inode; | |
1461 | ||
1462 | dout("vmtruncate_work %p\n", inode); | |
1463 | mutex_lock(&inode->i_mutex); | |
1464 | __ceph_do_pending_vmtruncate(inode); | |
1465 | mutex_unlock(&inode->i_mutex); | |
1466 | iput(inode); | |
1467 | } | |
1468 | ||
3c6f6b79 SW |
1469 | /* |
1470 | * Queue an async vmtruncate. If we fail to queue work, we will handle | |
1471 | * the truncation the next time we call __ceph_do_pending_vmtruncate. | |
1472 | */ | |
1473 | void ceph_queue_vmtruncate(struct inode *inode) | |
1474 | { | |
1475 | struct ceph_inode_info *ci = ceph_inode(inode); | |
1476 | ||
640ef79d | 1477 | if (queue_work(ceph_sb_to_client(inode->i_sb)->trunc_wq, |
3c6f6b79 SW |
1478 | &ci->i_vmtruncate_work)) { |
1479 | dout("ceph_queue_vmtruncate %p\n", inode); | |
70b666c3 | 1480 | ihold(inode); |
3c6f6b79 SW |
1481 | } else { |
1482 | dout("ceph_queue_vmtruncate %p failed, pending=%d\n", | |
1483 | inode, ci->i_truncate_pending); | |
1484 | } | |
1485 | } | |
1486 | ||
355da1eb SW |
1487 | /* |
1488 | * called with i_mutex held. | |
1489 | * | |
1490 | * Make sure any pending truncation is applied before doing anything | |
1491 | * that may depend on it. | |
1492 | */ | |
1493 | void __ceph_do_pending_vmtruncate(struct inode *inode) | |
1494 | { | |
1495 | struct ceph_inode_info *ci = ceph_inode(inode); | |
1496 | u64 to; | |
1497 | int wrbuffer_refs, wake = 0; | |
1498 | ||
1499 | retry: | |
1500 | spin_lock(&inode->i_lock); | |
1501 | if (ci->i_truncate_pending == 0) { | |
1502 | dout("__do_pending_vmtruncate %p none pending\n", inode); | |
1503 | spin_unlock(&inode->i_lock); | |
1504 | return; | |
1505 | } | |
1506 | ||
1507 | /* | |
1508 | * make sure any dirty snapped pages are flushed before we | |
1509 | * possibly truncate them.. so write AND block! | |
1510 | */ | |
1511 | if (ci->i_wrbuffer_ref_head < ci->i_wrbuffer_ref) { | |
1512 | dout("__do_pending_vmtruncate %p flushing snaps first\n", | |
1513 | inode); | |
1514 | spin_unlock(&inode->i_lock); | |
1515 | filemap_write_and_wait_range(&inode->i_data, 0, | |
1516 | inode->i_sb->s_maxbytes); | |
1517 | goto retry; | |
1518 | } | |
1519 | ||
1520 | to = ci->i_truncate_size; | |
1521 | wrbuffer_refs = ci->i_wrbuffer_ref; | |
1522 | dout("__do_pending_vmtruncate %p (%d) to %lld\n", inode, | |
1523 | ci->i_truncate_pending, to); | |
1524 | spin_unlock(&inode->i_lock); | |
1525 | ||
1526 | truncate_inode_pages(inode->i_mapping, to); | |
1527 | ||
1528 | spin_lock(&inode->i_lock); | |
1529 | ci->i_truncate_pending--; | |
1530 | if (ci->i_truncate_pending == 0) | |
1531 | wake = 1; | |
1532 | spin_unlock(&inode->i_lock); | |
1533 | ||
1534 | if (wrbuffer_refs == 0) | |
1535 | ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL); | |
1536 | if (wake) | |
03066f23 | 1537 | wake_up_all(&ci->i_cap_wq); |
355da1eb SW |
1538 | } |
1539 | ||
1540 | ||
1541 | /* | |
1542 | * symlinks | |
1543 | */ | |
1544 | static void *ceph_sym_follow_link(struct dentry *dentry, struct nameidata *nd) | |
1545 | { | |
1546 | struct ceph_inode_info *ci = ceph_inode(dentry->d_inode); | |
1547 | nd_set_link(nd, ci->i_symlink); | |
1548 | return NULL; | |
1549 | } | |
1550 | ||
1551 | static const struct inode_operations ceph_symlink_iops = { | |
1552 | .readlink = generic_readlink, | |
1553 | .follow_link = ceph_sym_follow_link, | |
1554 | }; | |
1555 | ||
1556 | /* | |
1557 | * setattr | |
1558 | */ | |
1559 | int ceph_setattr(struct dentry *dentry, struct iattr *attr) | |
1560 | { | |
1561 | struct inode *inode = dentry->d_inode; | |
1562 | struct ceph_inode_info *ci = ceph_inode(inode); | |
1563 | struct inode *parent_inode = dentry->d_parent->d_inode; | |
1564 | const unsigned int ia_valid = attr->ia_valid; | |
1565 | struct ceph_mds_request *req; | |
3d14c5d2 | 1566 | struct ceph_mds_client *mdsc = ceph_sb_to_client(dentry->d_sb)->mdsc; |
355da1eb SW |
1567 | int issued; |
1568 | int release = 0, dirtied = 0; | |
1569 | int mask = 0; | |
1570 | int err = 0; | |
fca65b4a | 1571 | int inode_dirty_flags = 0; |
355da1eb SW |
1572 | |
1573 | if (ceph_snap(inode) != CEPH_NOSNAP) | |
1574 | return -EROFS; | |
1575 | ||
1576 | __ceph_do_pending_vmtruncate(inode); | |
1577 | ||
1578 | err = inode_change_ok(inode, attr); | |
1579 | if (err != 0) | |
1580 | return err; | |
1581 | ||
1582 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETATTR, | |
1583 | USE_AUTH_MDS); | |
1584 | if (IS_ERR(req)) | |
1585 | return PTR_ERR(req); | |
1586 | ||
1587 | spin_lock(&inode->i_lock); | |
1588 | issued = __ceph_caps_issued(ci, NULL); | |
1589 | dout("setattr %p issued %s\n", inode, ceph_cap_string(issued)); | |
1590 | ||
1591 | if (ia_valid & ATTR_UID) { | |
1592 | dout("setattr %p uid %d -> %d\n", inode, | |
1593 | inode->i_uid, attr->ia_uid); | |
1594 | if (issued & CEPH_CAP_AUTH_EXCL) { | |
1595 | inode->i_uid = attr->ia_uid; | |
1596 | dirtied |= CEPH_CAP_AUTH_EXCL; | |
1597 | } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || | |
1598 | attr->ia_uid != inode->i_uid) { | |
1599 | req->r_args.setattr.uid = cpu_to_le32(attr->ia_uid); | |
1600 | mask |= CEPH_SETATTR_UID; | |
1601 | release |= CEPH_CAP_AUTH_SHARED; | |
1602 | } | |
1603 | } | |
1604 | if (ia_valid & ATTR_GID) { | |
1605 | dout("setattr %p gid %d -> %d\n", inode, | |
1606 | inode->i_gid, attr->ia_gid); | |
1607 | if (issued & CEPH_CAP_AUTH_EXCL) { | |
1608 | inode->i_gid = attr->ia_gid; | |
1609 | dirtied |= CEPH_CAP_AUTH_EXCL; | |
1610 | } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || | |
1611 | attr->ia_gid != inode->i_gid) { | |
1612 | req->r_args.setattr.gid = cpu_to_le32(attr->ia_gid); | |
1613 | mask |= CEPH_SETATTR_GID; | |
1614 | release |= CEPH_CAP_AUTH_SHARED; | |
1615 | } | |
1616 | } | |
1617 | if (ia_valid & ATTR_MODE) { | |
1618 | dout("setattr %p mode 0%o -> 0%o\n", inode, inode->i_mode, | |
1619 | attr->ia_mode); | |
1620 | if (issued & CEPH_CAP_AUTH_EXCL) { | |
1621 | inode->i_mode = attr->ia_mode; | |
1622 | dirtied |= CEPH_CAP_AUTH_EXCL; | |
1623 | } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || | |
1624 | attr->ia_mode != inode->i_mode) { | |
1625 | req->r_args.setattr.mode = cpu_to_le32(attr->ia_mode); | |
1626 | mask |= CEPH_SETATTR_MODE; | |
1627 | release |= CEPH_CAP_AUTH_SHARED; | |
1628 | } | |
1629 | } | |
1630 | ||
1631 | if (ia_valid & ATTR_ATIME) { | |
1632 | dout("setattr %p atime %ld.%ld -> %ld.%ld\n", inode, | |
1633 | inode->i_atime.tv_sec, inode->i_atime.tv_nsec, | |
1634 | attr->ia_atime.tv_sec, attr->ia_atime.tv_nsec); | |
1635 | if (issued & CEPH_CAP_FILE_EXCL) { | |
1636 | ci->i_time_warp_seq++; | |
1637 | inode->i_atime = attr->ia_atime; | |
1638 | dirtied |= CEPH_CAP_FILE_EXCL; | |
1639 | } else if ((issued & CEPH_CAP_FILE_WR) && | |
1640 | timespec_compare(&inode->i_atime, | |
1641 | &attr->ia_atime) < 0) { | |
1642 | inode->i_atime = attr->ia_atime; | |
1643 | dirtied |= CEPH_CAP_FILE_WR; | |
1644 | } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || | |
1645 | !timespec_equal(&inode->i_atime, &attr->ia_atime)) { | |
1646 | ceph_encode_timespec(&req->r_args.setattr.atime, | |
1647 | &attr->ia_atime); | |
1648 | mask |= CEPH_SETATTR_ATIME; | |
1649 | release |= CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_RD | | |
1650 | CEPH_CAP_FILE_WR; | |
1651 | } | |
1652 | } | |
1653 | if (ia_valid & ATTR_MTIME) { | |
1654 | dout("setattr %p mtime %ld.%ld -> %ld.%ld\n", inode, | |
1655 | inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec, | |
1656 | attr->ia_mtime.tv_sec, attr->ia_mtime.tv_nsec); | |
1657 | if (issued & CEPH_CAP_FILE_EXCL) { | |
1658 | ci->i_time_warp_seq++; | |
1659 | inode->i_mtime = attr->ia_mtime; | |
1660 | dirtied |= CEPH_CAP_FILE_EXCL; | |
1661 | } else if ((issued & CEPH_CAP_FILE_WR) && | |
1662 | timespec_compare(&inode->i_mtime, | |
1663 | &attr->ia_mtime) < 0) { | |
1664 | inode->i_mtime = attr->ia_mtime; | |
1665 | dirtied |= CEPH_CAP_FILE_WR; | |
1666 | } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || | |
1667 | !timespec_equal(&inode->i_mtime, &attr->ia_mtime)) { | |
1668 | ceph_encode_timespec(&req->r_args.setattr.mtime, | |
1669 | &attr->ia_mtime); | |
1670 | mask |= CEPH_SETATTR_MTIME; | |
1671 | release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_RD | | |
1672 | CEPH_CAP_FILE_WR; | |
1673 | } | |
1674 | } | |
1675 | if (ia_valid & ATTR_SIZE) { | |
1676 | dout("setattr %p size %lld -> %lld\n", inode, | |
1677 | inode->i_size, attr->ia_size); | |
1678 | if (attr->ia_size > inode->i_sb->s_maxbytes) { | |
1679 | err = -EINVAL; | |
1680 | goto out; | |
1681 | } | |
1682 | if ((issued & CEPH_CAP_FILE_EXCL) && | |
1683 | attr->ia_size > inode->i_size) { | |
1684 | inode->i_size = attr->ia_size; | |
355da1eb SW |
1685 | inode->i_blocks = |
1686 | (attr->ia_size + (1 << 9) - 1) >> 9; | |
1687 | inode->i_ctime = attr->ia_ctime; | |
1688 | ci->i_reported_size = attr->ia_size; | |
1689 | dirtied |= CEPH_CAP_FILE_EXCL; | |
1690 | } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || | |
1691 | attr->ia_size != inode->i_size) { | |
1692 | req->r_args.setattr.size = cpu_to_le64(attr->ia_size); | |
1693 | req->r_args.setattr.old_size = | |
1694 | cpu_to_le64(inode->i_size); | |
1695 | mask |= CEPH_SETATTR_SIZE; | |
1696 | release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_RD | | |
1697 | CEPH_CAP_FILE_WR; | |
1698 | } | |
1699 | } | |
1700 | ||
1701 | /* these do nothing */ | |
1702 | if (ia_valid & ATTR_CTIME) { | |
1703 | bool only = (ia_valid & (ATTR_SIZE|ATTR_MTIME|ATTR_ATIME| | |
1704 | ATTR_MODE|ATTR_UID|ATTR_GID)) == 0; | |
1705 | dout("setattr %p ctime %ld.%ld -> %ld.%ld (%s)\n", inode, | |
1706 | inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec, | |
1707 | attr->ia_ctime.tv_sec, attr->ia_ctime.tv_nsec, | |
1708 | only ? "ctime only" : "ignored"); | |
1709 | inode->i_ctime = attr->ia_ctime; | |
1710 | if (only) { | |
1711 | /* | |
1712 | * if kernel wants to dirty ctime but nothing else, | |
1713 | * we need to choose a cap to dirty under, or do | |
1714 | * a almost-no-op setattr | |
1715 | */ | |
1716 | if (issued & CEPH_CAP_AUTH_EXCL) | |
1717 | dirtied |= CEPH_CAP_AUTH_EXCL; | |
1718 | else if (issued & CEPH_CAP_FILE_EXCL) | |
1719 | dirtied |= CEPH_CAP_FILE_EXCL; | |
1720 | else if (issued & CEPH_CAP_XATTR_EXCL) | |
1721 | dirtied |= CEPH_CAP_XATTR_EXCL; | |
1722 | else | |
1723 | mask |= CEPH_SETATTR_CTIME; | |
1724 | } | |
1725 | } | |
1726 | if (ia_valid & ATTR_FILE) | |
1727 | dout("setattr %p ATTR_FILE ... hrm!\n", inode); | |
1728 | ||
1729 | if (dirtied) { | |
fca65b4a | 1730 | inode_dirty_flags = __ceph_mark_dirty_caps(ci, dirtied); |
355da1eb SW |
1731 | inode->i_ctime = CURRENT_TIME; |
1732 | } | |
1733 | ||
1734 | release &= issued; | |
1735 | spin_unlock(&inode->i_lock); | |
1736 | ||
fca65b4a SW |
1737 | if (inode_dirty_flags) |
1738 | __mark_inode_dirty(inode, inode_dirty_flags); | |
1739 | ||
355da1eb | 1740 | if (mask) { |
70b666c3 SW |
1741 | req->r_inode = inode; |
1742 | ihold(inode); | |
355da1eb SW |
1743 | req->r_inode_drop = release; |
1744 | req->r_args.setattr.mask = cpu_to_le32(mask); | |
1745 | req->r_num_caps = 1; | |
1746 | err = ceph_mdsc_do_request(mdsc, parent_inode, req); | |
1747 | } | |
1748 | dout("setattr %p result=%d (%s locally, %d remote)\n", inode, err, | |
1749 | ceph_cap_string(dirtied), mask); | |
1750 | ||
1751 | ceph_mdsc_put_request(req); | |
1752 | __ceph_do_pending_vmtruncate(inode); | |
1753 | return err; | |
1754 | out: | |
1755 | spin_unlock(&inode->i_lock); | |
1756 | ceph_mdsc_put_request(req); | |
1757 | return err; | |
1758 | } | |
1759 | ||
1760 | /* | |
1761 | * Verify that we have a lease on the given mask. If not, | |
1762 | * do a getattr against an mds. | |
1763 | */ | |
1764 | int ceph_do_getattr(struct inode *inode, int mask) | |
1765 | { | |
3d14c5d2 YS |
1766 | struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb); |
1767 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
355da1eb SW |
1768 | struct ceph_mds_request *req; |
1769 | int err; | |
1770 | ||
1771 | if (ceph_snap(inode) == CEPH_SNAPDIR) { | |
1772 | dout("do_getattr inode %p SNAPDIR\n", inode); | |
1773 | return 0; | |
1774 | } | |
1775 | ||
b7495fc2 | 1776 | dout("do_getattr inode %p mask %s mode 0%o\n", inode, ceph_cap_string(mask), inode->i_mode); |
355da1eb SW |
1777 | if (ceph_caps_issued_mask(ceph_inode(inode), mask, 1)) |
1778 | return 0; | |
1779 | ||
1780 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS); | |
1781 | if (IS_ERR(req)) | |
1782 | return PTR_ERR(req); | |
70b666c3 SW |
1783 | req->r_inode = inode; |
1784 | ihold(inode); | |
355da1eb SW |
1785 | req->r_num_caps = 1; |
1786 | req->r_args.getattr.mask = cpu_to_le32(mask); | |
1787 | err = ceph_mdsc_do_request(mdsc, NULL, req); | |
1788 | ceph_mdsc_put_request(req); | |
1789 | dout("do_getattr result=%d\n", err); | |
1790 | return err; | |
1791 | } | |
1792 | ||
1793 | ||
1794 | /* | |
1795 | * Check inode permissions. We verify we have a valid value for | |
1796 | * the AUTH cap, then call the generic handler. | |
1797 | */ | |
10556cb2 | 1798 | int ceph_permission(struct inode *inode, int mask) |
355da1eb | 1799 | { |
b74c79e9 NP |
1800 | int err; |
1801 | ||
10556cb2 | 1802 | if (mask & MAY_NOT_BLOCK) |
b74c79e9 NP |
1803 | return -ECHILD; |
1804 | ||
1805 | err = ceph_do_getattr(inode, CEPH_CAP_AUTH_SHARED); | |
355da1eb SW |
1806 | |
1807 | if (!err) | |
2830ba7f | 1808 | err = generic_permission(inode, mask); |
355da1eb SW |
1809 | return err; |
1810 | } | |
1811 | ||
1812 | /* | |
1813 | * Get all attributes. Hopefully somedata we'll have a statlite() | |
1814 | * and can limit the fields we require to be accurate. | |
1815 | */ | |
1816 | int ceph_getattr(struct vfsmount *mnt, struct dentry *dentry, | |
1817 | struct kstat *stat) | |
1818 | { | |
1819 | struct inode *inode = dentry->d_inode; | |
232d4b01 | 1820 | struct ceph_inode_info *ci = ceph_inode(inode); |
355da1eb SW |
1821 | int err; |
1822 | ||
1823 | err = ceph_do_getattr(inode, CEPH_STAT_CAP_INODE_ALL); | |
1824 | if (!err) { | |
1825 | generic_fillattr(inode, stat); | |
ad1fee96 | 1826 | stat->ino = ceph_translate_ino(inode->i_sb, inode->i_ino); |
355da1eb SW |
1827 | if (ceph_snap(inode) != CEPH_NOSNAP) |
1828 | stat->dev = ceph_snap(inode); | |
1829 | else | |
1830 | stat->dev = 0; | |
232d4b01 | 1831 | if (S_ISDIR(inode->i_mode)) { |
1c1266bb YS |
1832 | if (ceph_test_mount_opt(ceph_sb_to_client(inode->i_sb), |
1833 | RBYTES)) | |
1834 | stat->size = ci->i_rbytes; | |
1835 | else | |
1836 | stat->size = ci->i_files + ci->i_subdirs; | |
232d4b01 | 1837 | stat->blocks = 0; |
355da1eb | 1838 | stat->blksize = 65536; |
232d4b01 | 1839 | } |
355da1eb SW |
1840 | } |
1841 | return err; | |
1842 | } |