Commit | Line | Data |
---|---|---|
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> | |
4db658ea | 12 | #include <linux/posix_acl.h> |
3e7fbe9c | 13 | #include <linux/random.h> |
355da1eb SW |
14 | |
15 | #include "super.h" | |
3d14c5d2 | 16 | #include "mds_client.h" |
99ccbd22 | 17 | #include "cache.h" |
3d14c5d2 | 18 | #include <linux/ceph/decode.h> |
355da1eb SW |
19 | |
20 | /* | |
21 | * Ceph inode operations | |
22 | * | |
23 | * Implement basic inode helpers (get, alloc) and inode ops (getattr, | |
24 | * setattr, etc.), xattr helpers, and helpers for assimilating | |
25 | * metadata returned by the MDS into our cache. | |
26 | * | |
27 | * Also define helpers for doing asynchronous writeback, invalidation, | |
28 | * and truncation for the benefit of those who can't afford to block | |
29 | * (typically because they are in the message handler path). | |
30 | */ | |
31 | ||
32 | static const struct inode_operations ceph_symlink_iops; | |
33 | ||
3c6f6b79 SW |
34 | static void ceph_invalidate_work(struct work_struct *work); |
35 | static void ceph_writeback_work(struct work_struct *work); | |
36 | static void ceph_vmtruncate_work(struct work_struct *work); | |
355da1eb SW |
37 | |
38 | /* | |
39 | * find or create an inode, given the ceph ino number | |
40 | */ | |
ad1fee96 YS |
41 | static int ceph_set_ino_cb(struct inode *inode, void *data) |
42 | { | |
43 | ceph_inode(inode)->i_vino = *(struct ceph_vino *)data; | |
44 | inode->i_ino = ceph_vino_to_ino(*(struct ceph_vino *)data); | |
45 | return 0; | |
46 | } | |
47 | ||
355da1eb SW |
48 | struct inode *ceph_get_inode(struct super_block *sb, struct ceph_vino vino) |
49 | { | |
50 | struct inode *inode; | |
51 | ino_t t = ceph_vino_to_ino(vino); | |
52 | ||
53 | inode = iget5_locked(sb, t, ceph_ino_compare, ceph_set_ino_cb, &vino); | |
54 | if (inode == NULL) | |
55 | return ERR_PTR(-ENOMEM); | |
56 | if (inode->i_state & I_NEW) { | |
57 | dout("get_inode created new inode %p %llx.%llx ino %llx\n", | |
58 | inode, ceph_vinop(inode), (u64)inode->i_ino); | |
59 | unlock_new_inode(inode); | |
60 | } | |
61 | ||
62 | dout("get_inode on %lu=%llx.%llx got %p\n", inode->i_ino, vino.ino, | |
63 | vino.snap, inode); | |
64 | return inode; | |
65 | } | |
66 | ||
67 | /* | |
68 | * get/constuct snapdir inode for a given directory | |
69 | */ | |
70 | struct inode *ceph_get_snapdir(struct inode *parent) | |
71 | { | |
72 | struct ceph_vino vino = { | |
73 | .ino = ceph_ino(parent), | |
74 | .snap = CEPH_SNAPDIR, | |
75 | }; | |
76 | struct inode *inode = ceph_get_inode(parent->i_sb, vino); | |
b377ff13 | 77 | struct ceph_inode_info *ci = ceph_inode(inode); |
355da1eb SW |
78 | |
79 | BUG_ON(!S_ISDIR(parent->i_mode)); | |
80 | if (IS_ERR(inode)) | |
7e34bc52 | 81 | return inode; |
355da1eb SW |
82 | inode->i_mode = parent->i_mode; |
83 | inode->i_uid = parent->i_uid; | |
84 | inode->i_gid = parent->i_gid; | |
85 | inode->i_op = &ceph_dir_iops; | |
86 | inode->i_fop = &ceph_dir_fops; | |
b377ff13 SW |
87 | ci->i_snap_caps = CEPH_CAP_PIN; /* so we can open */ |
88 | ci->i_rbytes = 0; | |
355da1eb SW |
89 | return inode; |
90 | } | |
91 | ||
92 | const struct inode_operations ceph_file_iops = { | |
93 | .permission = ceph_permission, | |
94 | .setattr = ceph_setattr, | |
95 | .getattr = ceph_getattr, | |
96 | .setxattr = ceph_setxattr, | |
97 | .getxattr = ceph_getxattr, | |
98 | .listxattr = ceph_listxattr, | |
99 | .removexattr = ceph_removexattr, | |
7221fe4c | 100 | .get_acl = ceph_get_acl, |
72466d0b | 101 | .set_acl = ceph_set_acl, |
355da1eb SW |
102 | }; |
103 | ||
104 | ||
105 | /* | |
106 | * We use a 'frag tree' to keep track of the MDS's directory fragments | |
107 | * for a given inode (usually there is just a single fragment). We | |
108 | * need to know when a child frag is delegated to a new MDS, or when | |
109 | * it is flagged as replicated, so we can direct our requests | |
110 | * accordingly. | |
111 | */ | |
112 | ||
113 | /* | |
114 | * find/create a frag in the tree | |
115 | */ | |
116 | static struct ceph_inode_frag *__get_or_create_frag(struct ceph_inode_info *ci, | |
117 | u32 f) | |
118 | { | |
119 | struct rb_node **p; | |
120 | struct rb_node *parent = NULL; | |
121 | struct ceph_inode_frag *frag; | |
122 | int c; | |
123 | ||
124 | p = &ci->i_fragtree.rb_node; | |
125 | while (*p) { | |
126 | parent = *p; | |
127 | frag = rb_entry(parent, struct ceph_inode_frag, node); | |
128 | c = ceph_frag_compare(f, frag->frag); | |
129 | if (c < 0) | |
130 | p = &(*p)->rb_left; | |
131 | else if (c > 0) | |
132 | p = &(*p)->rb_right; | |
133 | else | |
134 | return frag; | |
135 | } | |
136 | ||
137 | frag = kmalloc(sizeof(*frag), GFP_NOFS); | |
138 | if (!frag) { | |
139 | pr_err("__get_or_create_frag ENOMEM on %p %llx.%llx " | |
140 | "frag %x\n", &ci->vfs_inode, | |
141 | ceph_vinop(&ci->vfs_inode), f); | |
142 | return ERR_PTR(-ENOMEM); | |
143 | } | |
144 | frag->frag = f; | |
145 | frag->split_by = 0; | |
146 | frag->mds = -1; | |
147 | frag->ndist = 0; | |
148 | ||
149 | rb_link_node(&frag->node, parent, p); | |
150 | rb_insert_color(&frag->node, &ci->i_fragtree); | |
151 | ||
152 | dout("get_or_create_frag added %llx.%llx frag %x\n", | |
153 | ceph_vinop(&ci->vfs_inode), f); | |
154 | return frag; | |
155 | } | |
156 | ||
157 | /* | |
158 | * find a specific frag @f | |
159 | */ | |
160 | struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci, u32 f) | |
161 | { | |
162 | struct rb_node *n = ci->i_fragtree.rb_node; | |
163 | ||
164 | while (n) { | |
165 | struct ceph_inode_frag *frag = | |
166 | rb_entry(n, struct ceph_inode_frag, node); | |
167 | int c = ceph_frag_compare(f, frag->frag); | |
168 | if (c < 0) | |
169 | n = n->rb_left; | |
170 | else if (c > 0) | |
171 | n = n->rb_right; | |
172 | else | |
173 | return frag; | |
174 | } | |
175 | return NULL; | |
176 | } | |
177 | ||
178 | /* | |
179 | * Choose frag containing the given value @v. If @pfrag is | |
180 | * specified, copy the frag delegation info to the caller if | |
181 | * it is present. | |
182 | */ | |
3e7fbe9c YZ |
183 | static u32 __ceph_choose_frag(struct ceph_inode_info *ci, u32 v, |
184 | struct ceph_inode_frag *pfrag, int *found) | |
355da1eb SW |
185 | { |
186 | u32 t = ceph_frag_make(0, 0); | |
187 | struct ceph_inode_frag *frag; | |
188 | unsigned nway, i; | |
189 | u32 n; | |
190 | ||
191 | if (found) | |
192 | *found = 0; | |
193 | ||
355da1eb SW |
194 | while (1) { |
195 | WARN_ON(!ceph_frag_contains_value(t, v)); | |
196 | frag = __ceph_find_frag(ci, t); | |
197 | if (!frag) | |
198 | break; /* t is a leaf */ | |
199 | if (frag->split_by == 0) { | |
200 | if (pfrag) | |
201 | memcpy(pfrag, frag, sizeof(*pfrag)); | |
202 | if (found) | |
203 | *found = 1; | |
204 | break; | |
205 | } | |
206 | ||
207 | /* choose child */ | |
208 | nway = 1 << frag->split_by; | |
209 | dout("choose_frag(%x) %x splits by %d (%d ways)\n", v, t, | |
210 | frag->split_by, nway); | |
211 | for (i = 0; i < nway; i++) { | |
212 | n = ceph_frag_make_child(t, frag->split_by, i); | |
213 | if (ceph_frag_contains_value(n, v)) { | |
214 | t = n; | |
215 | break; | |
216 | } | |
217 | } | |
218 | BUG_ON(i == nway); | |
219 | } | |
220 | dout("choose_frag(%x) = %x\n", v, t); | |
221 | ||
355da1eb SW |
222 | return t; |
223 | } | |
224 | ||
3e7fbe9c YZ |
225 | u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v, |
226 | struct ceph_inode_frag *pfrag, int *found) | |
227 | { | |
228 | u32 ret; | |
229 | mutex_lock(&ci->i_fragtree_mutex); | |
230 | ret = __ceph_choose_frag(ci, v, pfrag, found); | |
231 | mutex_unlock(&ci->i_fragtree_mutex); | |
232 | return ret; | |
233 | } | |
234 | ||
355da1eb SW |
235 | /* |
236 | * Process dirfrag (delegation) info from the mds. Include leaf | |
237 | * fragment in tree ONLY if ndist > 0. Otherwise, only | |
238 | * branches/splits are included in i_fragtree) | |
239 | */ | |
240 | static int ceph_fill_dirfrag(struct inode *inode, | |
241 | struct ceph_mds_reply_dirfrag *dirinfo) | |
242 | { | |
243 | struct ceph_inode_info *ci = ceph_inode(inode); | |
244 | struct ceph_inode_frag *frag; | |
245 | u32 id = le32_to_cpu(dirinfo->frag); | |
246 | int mds = le32_to_cpu(dirinfo->auth); | |
247 | int ndist = le32_to_cpu(dirinfo->ndist); | |
248 | int i; | |
249 | int err = 0; | |
250 | ||
251 | mutex_lock(&ci->i_fragtree_mutex); | |
252 | if (ndist == 0) { | |
253 | /* no delegation info needed. */ | |
254 | frag = __ceph_find_frag(ci, id); | |
255 | if (!frag) | |
256 | goto out; | |
257 | if (frag->split_by == 0) { | |
258 | /* tree leaf, remove */ | |
259 | dout("fill_dirfrag removed %llx.%llx frag %x" | |
260 | " (no ref)\n", ceph_vinop(inode), id); | |
261 | rb_erase(&frag->node, &ci->i_fragtree); | |
262 | kfree(frag); | |
263 | } else { | |
264 | /* tree branch, keep and clear */ | |
265 | dout("fill_dirfrag cleared %llx.%llx frag %x" | |
266 | " referral\n", ceph_vinop(inode), id); | |
267 | frag->mds = -1; | |
268 | frag->ndist = 0; | |
269 | } | |
270 | goto out; | |
271 | } | |
272 | ||
273 | ||
274 | /* find/add this frag to store mds delegation info */ | |
275 | frag = __get_or_create_frag(ci, id); | |
276 | if (IS_ERR(frag)) { | |
277 | /* this is not the end of the world; we can continue | |
278 | with bad/inaccurate delegation info */ | |
279 | pr_err("fill_dirfrag ENOMEM on mds ref %llx.%llx fg %x\n", | |
280 | ceph_vinop(inode), le32_to_cpu(dirinfo->frag)); | |
281 | err = -ENOMEM; | |
282 | goto out; | |
283 | } | |
284 | ||
285 | frag->mds = mds; | |
286 | frag->ndist = min_t(u32, ndist, CEPH_MAX_DIRFRAG_REP); | |
287 | for (i = 0; i < frag->ndist; i++) | |
288 | frag->dist[i] = le32_to_cpu(dirinfo->dist[i]); | |
289 | dout("fill_dirfrag %llx.%llx frag %x ndist=%d\n", | |
290 | ceph_vinop(inode), frag->frag, frag->ndist); | |
291 | ||
292 | out: | |
293 | mutex_unlock(&ci->i_fragtree_mutex); | |
294 | return err; | |
295 | } | |
296 | ||
3e7fbe9c YZ |
297 | static int ceph_fill_fragtree(struct inode *inode, |
298 | struct ceph_frag_tree_head *fragtree, | |
299 | struct ceph_mds_reply_dirfrag *dirinfo) | |
300 | { | |
301 | struct ceph_inode_info *ci = ceph_inode(inode); | |
302 | struct ceph_inode_frag *frag; | |
303 | struct rb_node *rb_node; | |
304 | int i; | |
305 | u32 id, nsplits; | |
306 | bool update = false; | |
307 | ||
308 | mutex_lock(&ci->i_fragtree_mutex); | |
309 | nsplits = le32_to_cpu(fragtree->nsplits); | |
310 | if (nsplits) { | |
311 | i = prandom_u32() % nsplits; | |
312 | id = le32_to_cpu(fragtree->splits[i].frag); | |
313 | if (!__ceph_find_frag(ci, id)) | |
314 | update = true; | |
315 | } else if (!RB_EMPTY_ROOT(&ci->i_fragtree)) { | |
316 | rb_node = rb_first(&ci->i_fragtree); | |
317 | frag = rb_entry(rb_node, struct ceph_inode_frag, node); | |
318 | if (frag->frag != ceph_frag_make(0, 0) || rb_next(rb_node)) | |
319 | update = true; | |
320 | } | |
321 | if (!update && dirinfo) { | |
322 | id = le32_to_cpu(dirinfo->frag); | |
323 | if (id != __ceph_choose_frag(ci, id, NULL, NULL)) | |
324 | update = true; | |
325 | } | |
326 | if (!update) | |
327 | goto out_unlock; | |
328 | ||
329 | dout("fill_fragtree %llx.%llx\n", ceph_vinop(inode)); | |
330 | rb_node = rb_first(&ci->i_fragtree); | |
331 | for (i = 0; i < nsplits; i++) { | |
332 | id = le32_to_cpu(fragtree->splits[i].frag); | |
333 | frag = NULL; | |
334 | while (rb_node) { | |
335 | frag = rb_entry(rb_node, struct ceph_inode_frag, node); | |
336 | if (ceph_frag_compare(frag->frag, id) >= 0) { | |
337 | if (frag->frag != id) | |
338 | frag = NULL; | |
339 | else | |
340 | rb_node = rb_next(rb_node); | |
341 | break; | |
342 | } | |
343 | rb_node = rb_next(rb_node); | |
344 | rb_erase(&frag->node, &ci->i_fragtree); | |
345 | kfree(frag); | |
346 | frag = NULL; | |
347 | } | |
348 | if (!frag) { | |
349 | frag = __get_or_create_frag(ci, id); | |
350 | if (IS_ERR(frag)) | |
351 | continue; | |
352 | } | |
353 | frag->split_by = le32_to_cpu(fragtree->splits[i].by); | |
354 | dout(" frag %x split by %d\n", frag->frag, frag->split_by); | |
355 | } | |
356 | while (rb_node) { | |
357 | frag = rb_entry(rb_node, struct ceph_inode_frag, node); | |
358 | rb_node = rb_next(rb_node); | |
359 | rb_erase(&frag->node, &ci->i_fragtree); | |
360 | kfree(frag); | |
361 | } | |
362 | out_unlock: | |
363 | mutex_unlock(&ci->i_fragtree_mutex); | |
364 | return 0; | |
365 | } | |
355da1eb SW |
366 | |
367 | /* | |
368 | * initialize a newly allocated inode. | |
369 | */ | |
370 | struct inode *ceph_alloc_inode(struct super_block *sb) | |
371 | { | |
372 | struct ceph_inode_info *ci; | |
373 | int i; | |
374 | ||
375 | ci = kmem_cache_alloc(ceph_inode_cachep, GFP_NOFS); | |
376 | if (!ci) | |
377 | return NULL; | |
378 | ||
379 | dout("alloc_inode %p\n", &ci->vfs_inode); | |
380 | ||
be655596 SW |
381 | spin_lock_init(&ci->i_ceph_lock); |
382 | ||
355da1eb SW |
383 | ci->i_version = 0; |
384 | ci->i_time_warp_seq = 0; | |
385 | ci->i_ceph_flags = 0; | |
2f276c51 YZ |
386 | atomic_set(&ci->i_release_count, 1); |
387 | atomic_set(&ci->i_complete_count, 0); | |
355da1eb SW |
388 | ci->i_symlink = NULL; |
389 | ||
6c0f3af7 SW |
390 | memset(&ci->i_dir_layout, 0, sizeof(ci->i_dir_layout)); |
391 | ||
355da1eb SW |
392 | ci->i_fragtree = RB_ROOT; |
393 | mutex_init(&ci->i_fragtree_mutex); | |
394 | ||
395 | ci->i_xattrs.blob = NULL; | |
396 | ci->i_xattrs.prealloc_blob = NULL; | |
397 | ci->i_xattrs.dirty = false; | |
398 | ci->i_xattrs.index = RB_ROOT; | |
399 | ci->i_xattrs.count = 0; | |
400 | ci->i_xattrs.names_size = 0; | |
401 | ci->i_xattrs.vals_size = 0; | |
402 | ci->i_xattrs.version = 0; | |
403 | ci->i_xattrs.index_version = 0; | |
404 | ||
405 | ci->i_caps = RB_ROOT; | |
406 | ci->i_auth_cap = NULL; | |
407 | ci->i_dirty_caps = 0; | |
408 | ci->i_flushing_caps = 0; | |
409 | INIT_LIST_HEAD(&ci->i_dirty_item); | |
410 | INIT_LIST_HEAD(&ci->i_flushing_item); | |
411 | ci->i_cap_flush_seq = 0; | |
412 | ci->i_cap_flush_last_tid = 0; | |
413 | memset(&ci->i_cap_flush_tid, 0, sizeof(ci->i_cap_flush_tid)); | |
414 | init_waitqueue_head(&ci->i_cap_wq); | |
415 | ci->i_hold_caps_min = 0; | |
416 | ci->i_hold_caps_max = 0; | |
417 | INIT_LIST_HEAD(&ci->i_cap_delay_list); | |
355da1eb SW |
418 | INIT_LIST_HEAD(&ci->i_cap_snaps); |
419 | ci->i_head_snapc = NULL; | |
420 | ci->i_snap_caps = 0; | |
421 | ||
422 | for (i = 0; i < CEPH_FILE_MODE_NUM; i++) | |
423 | ci->i_nr_by_mode[i] = 0; | |
424 | ||
b0d7c223 | 425 | mutex_init(&ci->i_truncate_mutex); |
355da1eb SW |
426 | ci->i_truncate_seq = 0; |
427 | ci->i_truncate_size = 0; | |
428 | ci->i_truncate_pending = 0; | |
429 | ||
430 | ci->i_max_size = 0; | |
431 | ci->i_reported_size = 0; | |
432 | ci->i_wanted_max_size = 0; | |
433 | ci->i_requested_max_size = 0; | |
434 | ||
435 | ci->i_pin_ref = 0; | |
436 | ci->i_rd_ref = 0; | |
437 | ci->i_rdcache_ref = 0; | |
438 | ci->i_wr_ref = 0; | |
d3d0720d | 439 | ci->i_wb_ref = 0; |
355da1eb SW |
440 | ci->i_wrbuffer_ref = 0; |
441 | ci->i_wrbuffer_ref_head = 0; | |
442 | ci->i_shared_gen = 0; | |
443 | ci->i_rdcache_gen = 0; | |
444 | ci->i_rdcache_revoking = 0; | |
445 | ||
446 | INIT_LIST_HEAD(&ci->i_unsafe_writes); | |
447 | INIT_LIST_HEAD(&ci->i_unsafe_dirops); | |
448 | spin_lock_init(&ci->i_unsafe_lock); | |
449 | ||
450 | ci->i_snap_realm = NULL; | |
451 | INIT_LIST_HEAD(&ci->i_snap_realm_item); | |
452 | INIT_LIST_HEAD(&ci->i_snap_flush_item); | |
453 | ||
3c6f6b79 SW |
454 | INIT_WORK(&ci->i_wb_work, ceph_writeback_work); |
455 | INIT_WORK(&ci->i_pg_inv_work, ceph_invalidate_work); | |
355da1eb SW |
456 | |
457 | INIT_WORK(&ci->i_vmtruncate_work, ceph_vmtruncate_work); | |
458 | ||
99ccbd22 MT |
459 | ceph_fscache_inode_init(ci); |
460 | ||
355da1eb SW |
461 | return &ci->vfs_inode; |
462 | } | |
463 | ||
fa0d7e3d NP |
464 | static void ceph_i_callback(struct rcu_head *head) |
465 | { | |
466 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
467 | struct ceph_inode_info *ci = ceph_inode(inode); | |
468 | ||
fa0d7e3d NP |
469 | kmem_cache_free(ceph_inode_cachep, ci); |
470 | } | |
471 | ||
355da1eb SW |
472 | void ceph_destroy_inode(struct inode *inode) |
473 | { | |
474 | struct ceph_inode_info *ci = ceph_inode(inode); | |
475 | struct ceph_inode_frag *frag; | |
476 | struct rb_node *n; | |
477 | ||
478 | dout("destroy_inode %p ino %llx.%llx\n", inode, ceph_vinop(inode)); | |
479 | ||
99ccbd22 MT |
480 | ceph_fscache_unregister_inode_cookie(ci); |
481 | ||
355da1eb SW |
482 | ceph_queue_caps_release(inode); |
483 | ||
8b218b8a SW |
484 | /* |
485 | * we may still have a snap_realm reference if there are stray | |
d9df2783 | 486 | * caps in i_snap_caps. |
8b218b8a SW |
487 | */ |
488 | if (ci->i_snap_realm) { | |
489 | struct ceph_mds_client *mdsc = | |
3d14c5d2 | 490 | ceph_sb_to_client(ci->vfs_inode.i_sb)->mdsc; |
8b218b8a SW |
491 | struct ceph_snap_realm *realm = ci->i_snap_realm; |
492 | ||
493 | dout(" dropping residual ref to snap realm %p\n", realm); | |
494 | spin_lock(&realm->inodes_with_caps_lock); | |
495 | list_del_init(&ci->i_snap_realm_item); | |
496 | spin_unlock(&realm->inodes_with_caps_lock); | |
497 | ceph_put_snap_realm(mdsc, realm); | |
498 | } | |
499 | ||
355da1eb SW |
500 | kfree(ci->i_symlink); |
501 | while ((n = rb_first(&ci->i_fragtree)) != NULL) { | |
502 | frag = rb_entry(n, struct ceph_inode_frag, node); | |
503 | rb_erase(n, &ci->i_fragtree); | |
504 | kfree(frag); | |
505 | } | |
506 | ||
507 | __ceph_destroy_xattrs(ci); | |
b6c1d5b8 SW |
508 | if (ci->i_xattrs.blob) |
509 | ceph_buffer_put(ci->i_xattrs.blob); | |
510 | if (ci->i_xattrs.prealloc_blob) | |
511 | ceph_buffer_put(ci->i_xattrs.prealloc_blob); | |
355da1eb | 512 | |
fa0d7e3d | 513 | call_rcu(&inode->i_rcu, ceph_i_callback); |
355da1eb SW |
514 | } |
515 | ||
9f12bd11 YZ |
516 | int ceph_drop_inode(struct inode *inode) |
517 | { | |
518 | /* | |
519 | * Positve dentry and corresponding inode are always accompanied | |
520 | * in MDS reply. So no need to keep inode in the cache after | |
521 | * dropping all its aliases. | |
522 | */ | |
523 | return 1; | |
524 | } | |
525 | ||
355da1eb SW |
526 | /* |
527 | * Helpers to fill in size, ctime, mtime, and atime. We have to be | |
528 | * careful because either the client or MDS may have more up to date | |
529 | * info, depending on which capabilities are held, and whether | |
530 | * time_warp_seq or truncate_seq have increased. (Ordinarily, mtime | |
531 | * and size are monotonically increasing, except when utimes() or | |
532 | * truncate() increments the corresponding _seq values.) | |
533 | */ | |
534 | int ceph_fill_file_size(struct inode *inode, int issued, | |
535 | u32 truncate_seq, u64 truncate_size, u64 size) | |
536 | { | |
537 | struct ceph_inode_info *ci = ceph_inode(inode); | |
538 | int queue_trunc = 0; | |
539 | ||
540 | if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) > 0 || | |
541 | (truncate_seq == ci->i_truncate_seq && size > inode->i_size)) { | |
542 | dout("size %lld -> %llu\n", inode->i_size, size); | |
543 | inode->i_size = size; | |
544 | inode->i_blocks = (size + (1<<9) - 1) >> 9; | |
545 | ci->i_reported_size = size; | |
546 | if (truncate_seq != ci->i_truncate_seq) { | |
547 | dout("truncate_seq %u -> %u\n", | |
548 | ci->i_truncate_seq, truncate_seq); | |
549 | ci->i_truncate_seq = truncate_seq; | |
b0d7c223 YZ |
550 | |
551 | /* the MDS should have revoked these caps */ | |
552 | WARN_ON_ONCE(issued & (CEPH_CAP_FILE_EXCL | | |
553 | CEPH_CAP_FILE_RD | | |
554 | CEPH_CAP_FILE_WR | | |
555 | CEPH_CAP_FILE_LAZYIO)); | |
3d497d85 YS |
556 | /* |
557 | * If we hold relevant caps, or in the case where we're | |
558 | * not the only client referencing this file and we | |
559 | * don't hold those caps, then we need to check whether | |
560 | * the file is either opened or mmaped | |
561 | */ | |
b0d7c223 YZ |
562 | if ((issued & (CEPH_CAP_FILE_CACHE| |
563 | CEPH_CAP_FILE_BUFFER)) || | |
3d497d85 YS |
564 | mapping_mapped(inode->i_mapping) || |
565 | __ceph_caps_file_wanted(ci)) { | |
355da1eb SW |
566 | ci->i_truncate_pending++; |
567 | queue_trunc = 1; | |
568 | } | |
569 | } | |
570 | } | |
571 | if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) >= 0 && | |
572 | ci->i_truncate_size != truncate_size) { | |
573 | dout("truncate_size %lld -> %llu\n", ci->i_truncate_size, | |
574 | truncate_size); | |
575 | ci->i_truncate_size = truncate_size; | |
576 | } | |
99ccbd22 MT |
577 | |
578 | if (queue_trunc) | |
579 | ceph_fscache_invalidate(inode); | |
580 | ||
355da1eb SW |
581 | return queue_trunc; |
582 | } | |
583 | ||
584 | void ceph_fill_file_time(struct inode *inode, int issued, | |
585 | u64 time_warp_seq, struct timespec *ctime, | |
586 | struct timespec *mtime, struct timespec *atime) | |
587 | { | |
588 | struct ceph_inode_info *ci = ceph_inode(inode); | |
589 | int warn = 0; | |
590 | ||
591 | if (issued & (CEPH_CAP_FILE_EXCL| | |
592 | CEPH_CAP_FILE_WR| | |
d8672d64 SW |
593 | CEPH_CAP_FILE_BUFFER| |
594 | CEPH_CAP_AUTH_EXCL| | |
595 | CEPH_CAP_XATTR_EXCL)) { | |
355da1eb SW |
596 | if (timespec_compare(ctime, &inode->i_ctime) > 0) { |
597 | dout("ctime %ld.%09ld -> %ld.%09ld inc w/ cap\n", | |
598 | inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec, | |
599 | ctime->tv_sec, ctime->tv_nsec); | |
600 | inode->i_ctime = *ctime; | |
601 | } | |
602 | if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) > 0) { | |
603 | /* the MDS did a utimes() */ | |
604 | dout("mtime %ld.%09ld -> %ld.%09ld " | |
605 | "tw %d -> %d\n", | |
606 | inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec, | |
607 | mtime->tv_sec, mtime->tv_nsec, | |
608 | ci->i_time_warp_seq, (int)time_warp_seq); | |
609 | ||
610 | inode->i_mtime = *mtime; | |
611 | inode->i_atime = *atime; | |
612 | ci->i_time_warp_seq = time_warp_seq; | |
613 | } else if (time_warp_seq == ci->i_time_warp_seq) { | |
614 | /* nobody did utimes(); take the max */ | |
615 | if (timespec_compare(mtime, &inode->i_mtime) > 0) { | |
616 | dout("mtime %ld.%09ld -> %ld.%09ld inc\n", | |
617 | inode->i_mtime.tv_sec, | |
618 | inode->i_mtime.tv_nsec, | |
619 | mtime->tv_sec, mtime->tv_nsec); | |
620 | inode->i_mtime = *mtime; | |
621 | } | |
622 | if (timespec_compare(atime, &inode->i_atime) > 0) { | |
623 | dout("atime %ld.%09ld -> %ld.%09ld inc\n", | |
624 | inode->i_atime.tv_sec, | |
625 | inode->i_atime.tv_nsec, | |
626 | atime->tv_sec, atime->tv_nsec); | |
627 | inode->i_atime = *atime; | |
628 | } | |
629 | } else if (issued & CEPH_CAP_FILE_EXCL) { | |
630 | /* we did a utimes(); ignore mds values */ | |
631 | } else { | |
632 | warn = 1; | |
633 | } | |
634 | } else { | |
d8672d64 | 635 | /* we have no write|excl caps; whatever the MDS says is true */ |
355da1eb SW |
636 | if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) >= 0) { |
637 | inode->i_ctime = *ctime; | |
638 | inode->i_mtime = *mtime; | |
639 | inode->i_atime = *atime; | |
640 | ci->i_time_warp_seq = time_warp_seq; | |
641 | } else { | |
642 | warn = 1; | |
643 | } | |
644 | } | |
645 | if (warn) /* time_warp_seq shouldn't go backwards */ | |
646 | dout("%p mds time_warp_seq %llu < %u\n", | |
647 | inode, time_warp_seq, ci->i_time_warp_seq); | |
648 | } | |
649 | ||
650 | /* | |
651 | * Populate an inode based on info from mds. May be called on new or | |
652 | * existing inodes. | |
653 | */ | |
654 | static int fill_inode(struct inode *inode, | |
655 | struct ceph_mds_reply_info_in *iinfo, | |
656 | struct ceph_mds_reply_dirfrag *dirinfo, | |
657 | struct ceph_mds_session *session, | |
658 | unsigned long ttl_from, int cap_fmode, | |
659 | struct ceph_cap_reservation *caps_reservation) | |
660 | { | |
d9df2783 | 661 | struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc; |
355da1eb SW |
662 | struct ceph_mds_reply_inode *info = iinfo->in; |
663 | struct ceph_inode_info *ci = ceph_inode(inode); | |
f98a128a | 664 | int issued = 0, implemented, new_issued; |
355da1eb | 665 | struct timespec mtime, atime, ctime; |
355da1eb | 666 | struct ceph_buffer *xattr_blob = NULL; |
d9df2783 | 667 | struct ceph_cap *new_cap = NULL; |
355da1eb | 668 | int err = 0; |
d9df2783 | 669 | bool wake = false; |
f98a128a YZ |
670 | bool queue_trunc = false; |
671 | bool new_version = false; | |
355da1eb SW |
672 | |
673 | dout("fill_inode %p ino %llx.%llx v %llu had %llu\n", | |
674 | inode, ceph_vinop(inode), le64_to_cpu(info->version), | |
675 | ci->i_version); | |
676 | ||
d9df2783 YZ |
677 | /* prealloc new cap struct */ |
678 | if (info->cap.caps && ceph_snap(inode) == CEPH_NOSNAP) | |
679 | new_cap = ceph_get_cap(mdsc, caps_reservation); | |
680 | ||
355da1eb SW |
681 | /* |
682 | * prealloc xattr data, if it looks like we'll need it. only | |
683 | * if len > 4 (meaning there are actually xattrs; the first 4 | |
684 | * bytes are the xattr count). | |
685 | */ | |
686 | if (iinfo->xattr_len > 4) { | |
b6c1d5b8 | 687 | xattr_blob = ceph_buffer_new(iinfo->xattr_len, GFP_NOFS); |
355da1eb SW |
688 | if (!xattr_blob) |
689 | pr_err("fill_inode ENOMEM xattr blob %d bytes\n", | |
690 | iinfo->xattr_len); | |
691 | } | |
692 | ||
be655596 | 693 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
694 | |
695 | /* | |
696 | * provided version will be odd if inode value is projected, | |
8bd59e01 SW |
697 | * even if stable. skip the update if we have newer stable |
698 | * info (ours>=theirs, e.g. due to racing mds replies), unless | |
699 | * we are getting projected (unstable) info (in which case the | |
700 | * version is odd, and we want ours>theirs). | |
701 | * us them | |
702 | * 2 2 skip | |
703 | * 3 2 skip | |
704 | * 3 3 update | |
355da1eb | 705 | */ |
f98a128a YZ |
706 | if (ci->i_version == 0 || |
707 | ((info->cap.flags & CEPH_CAP_FLAG_AUTH) && | |
708 | le64_to_cpu(info->version) > (ci->i_version & ~1))) | |
709 | new_version = true; | |
710 | ||
355da1eb SW |
711 | issued = __ceph_caps_issued(ci, &implemented); |
712 | issued |= implemented | __ceph_caps_dirty(ci); | |
f98a128a | 713 | new_issued = ~issued & le32_to_cpu(info->cap.caps); |
355da1eb SW |
714 | |
715 | /* update inode */ | |
716 | ci->i_version = le64_to_cpu(info->version); | |
717 | inode->i_version++; | |
718 | inode->i_rdev = le32_to_cpu(info->rdev); | |
f98a128a | 719 | inode->i_blkbits = fls(le32_to_cpu(info->layout.fl_stripe_unit)) - 1; |
355da1eb | 720 | |
f98a128a YZ |
721 | if ((new_version || (new_issued & CEPH_CAP_AUTH_SHARED)) && |
722 | (issued & CEPH_CAP_AUTH_EXCL) == 0) { | |
355da1eb | 723 | inode->i_mode = le32_to_cpu(info->mode); |
ab871b90 EB |
724 | inode->i_uid = make_kuid(&init_user_ns, le32_to_cpu(info->uid)); |
725 | inode->i_gid = make_kgid(&init_user_ns, le32_to_cpu(info->gid)); | |
355da1eb | 726 | dout("%p mode 0%o uid.gid %d.%d\n", inode, inode->i_mode, |
bd2bae6a EB |
727 | from_kuid(&init_user_ns, inode->i_uid), |
728 | from_kgid(&init_user_ns, inode->i_gid)); | |
355da1eb SW |
729 | } |
730 | ||
f98a128a YZ |
731 | if ((new_version || (new_issued & CEPH_CAP_LINK_SHARED)) && |
732 | (issued & CEPH_CAP_LINK_EXCL) == 0) | |
bfe86848 | 733 | set_nlink(inode, le32_to_cpu(info->nlink)); |
355da1eb | 734 | |
f98a128a YZ |
735 | if (new_version || (new_issued & CEPH_CAP_ANY_RD)) { |
736 | /* be careful with mtime, atime, size */ | |
737 | ceph_decode_timespec(&atime, &info->atime); | |
738 | ceph_decode_timespec(&mtime, &info->mtime); | |
739 | ceph_decode_timespec(&ctime, &info->ctime); | |
740 | ceph_fill_file_time(inode, issued, | |
741 | le32_to_cpu(info->time_warp_seq), | |
742 | &ctime, &mtime, &atime); | |
743 | } | |
744 | ||
745 | if (new_version || | |
746 | (new_issued & (CEPH_CAP_ANY_FILE_RD | CEPH_CAP_ANY_FILE_WR))) { | |
747 | ci->i_layout = info->layout; | |
748 | queue_trunc = ceph_fill_file_size(inode, issued, | |
749 | le32_to_cpu(info->truncate_seq), | |
750 | le64_to_cpu(info->truncate_size), | |
751 | le64_to_cpu(info->size)); | |
752 | /* only update max_size on auth cap */ | |
753 | if ((info->cap.flags & CEPH_CAP_FLAG_AUTH) && | |
754 | ci->i_max_size != le64_to_cpu(info->max_size)) { | |
755 | dout("max_size %lld -> %llu\n", ci->i_max_size, | |
756 | le64_to_cpu(info->max_size)); | |
757 | ci->i_max_size = le64_to_cpu(info->max_size); | |
758 | } | |
759 | } | |
355da1eb SW |
760 | |
761 | /* xattrs */ | |
762 | /* note that if i_xattrs.len <= 4, i_xattrs.data will still be NULL. */ | |
763 | if ((issued & CEPH_CAP_XATTR_EXCL) == 0 && | |
764 | le64_to_cpu(info->xattr_version) > ci->i_xattrs.version) { | |
765 | if (ci->i_xattrs.blob) | |
766 | ceph_buffer_put(ci->i_xattrs.blob); | |
767 | ci->i_xattrs.blob = xattr_blob; | |
768 | if (xattr_blob) | |
769 | memcpy(ci->i_xattrs.blob->vec.iov_base, | |
770 | iinfo->xattr_data, iinfo->xattr_len); | |
771 | ci->i_xattrs.version = le64_to_cpu(info->xattr_version); | |
7221fe4c | 772 | ceph_forget_all_cached_acls(inode); |
a6424e48 | 773 | xattr_blob = NULL; |
355da1eb SW |
774 | } |
775 | ||
776 | inode->i_mapping->a_ops = &ceph_aops; | |
777 | inode->i_mapping->backing_dev_info = | |
640ef79d | 778 | &ceph_sb_to_client(inode->i_sb)->backing_dev_info; |
355da1eb SW |
779 | |
780 | switch (inode->i_mode & S_IFMT) { | |
781 | case S_IFIFO: | |
782 | case S_IFBLK: | |
783 | case S_IFCHR: | |
784 | case S_IFSOCK: | |
785 | init_special_inode(inode, inode->i_mode, inode->i_rdev); | |
786 | inode->i_op = &ceph_file_iops; | |
787 | break; | |
788 | case S_IFREG: | |
789 | inode->i_op = &ceph_file_iops; | |
790 | inode->i_fop = &ceph_file_fops; | |
791 | break; | |
792 | case S_IFLNK: | |
793 | inode->i_op = &ceph_symlink_iops; | |
794 | if (!ci->i_symlink) { | |
810339ec | 795 | u32 symlen = iinfo->symlink_len; |
355da1eb SW |
796 | char *sym; |
797 | ||
be655596 | 798 | spin_unlock(&ci->i_ceph_lock); |
355da1eb | 799 | |
810339ec XW |
800 | err = -EINVAL; |
801 | if (WARN_ON(symlen != inode->i_size)) | |
802 | goto out; | |
803 | ||
355da1eb | 804 | err = -ENOMEM; |
810339ec | 805 | sym = kstrndup(iinfo->symlink, symlen, GFP_NOFS); |
355da1eb SW |
806 | if (!sym) |
807 | goto out; | |
355da1eb | 808 | |
be655596 | 809 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
810 | if (!ci->i_symlink) |
811 | ci->i_symlink = sym; | |
812 | else | |
813 | kfree(sym); /* lost a race */ | |
814 | } | |
815 | break; | |
816 | case S_IFDIR: | |
817 | inode->i_op = &ceph_dir_iops; | |
818 | inode->i_fop = &ceph_dir_fops; | |
819 | ||
14303d20 SW |
820 | ci->i_dir_layout = iinfo->dir_layout; |
821 | ||
355da1eb SW |
822 | ci->i_files = le64_to_cpu(info->files); |
823 | ci->i_subdirs = le64_to_cpu(info->subdirs); | |
824 | ci->i_rbytes = le64_to_cpu(info->rbytes); | |
825 | ci->i_rfiles = le64_to_cpu(info->rfiles); | |
826 | ci->i_rsubdirs = le64_to_cpu(info->rsubdirs); | |
827 | ceph_decode_timespec(&ci->i_rctime, &info->rctime); | |
355da1eb SW |
828 | break; |
829 | default: | |
830 | pr_err("fill_inode %llx.%llx BAD mode 0%o\n", | |
831 | ceph_vinop(inode), inode->i_mode); | |
832 | } | |
833 | ||
a8673d61 YZ |
834 | /* set dir completion flag? */ |
835 | if (S_ISDIR(inode->i_mode) && | |
836 | ci->i_files == 0 && ci->i_subdirs == 0 && | |
837 | ceph_snap(inode) == CEPH_NOSNAP && | |
838 | (le32_to_cpu(info->cap.caps) & CEPH_CAP_FILE_SHARED) && | |
839 | (issued & CEPH_CAP_FILE_EXCL) == 0 && | |
2f276c51 | 840 | !__ceph_dir_is_complete(ci)) { |
a8673d61 | 841 | dout(" marking %p complete (empty)\n", inode); |
2f276c51 | 842 | __ceph_dir_set_complete(ci, atomic_read(&ci->i_release_count)); |
a8673d61 | 843 | } |
d9df2783 YZ |
844 | |
845 | /* were we issued a capability? */ | |
846 | if (info->cap.caps) { | |
847 | if (ceph_snap(inode) == CEPH_NOSNAP) { | |
848 | ceph_add_cap(inode, session, | |
849 | le64_to_cpu(info->cap.cap_id), | |
850 | cap_fmode, | |
851 | le32_to_cpu(info->cap.caps), | |
852 | le32_to_cpu(info->cap.wanted), | |
853 | le32_to_cpu(info->cap.seq), | |
854 | le32_to_cpu(info->cap.mseq), | |
855 | le64_to_cpu(info->cap.realm), | |
856 | info->cap.flags, &new_cap); | |
857 | wake = true; | |
858 | } else { | |
859 | dout(" %p got snap_caps %s\n", inode, | |
860 | ceph_cap_string(le32_to_cpu(info->cap.caps))); | |
861 | ci->i_snap_caps |= le32_to_cpu(info->cap.caps); | |
862 | if (cap_fmode >= 0) | |
863 | __ceph_get_fmode(ci, cap_fmode); | |
864 | } | |
865 | } else if (cap_fmode >= 0) { | |
866 | pr_warning("mds issued no caps on %llx.%llx\n", | |
867 | ceph_vinop(inode)); | |
868 | __ceph_get_fmode(ci, cap_fmode); | |
869 | } | |
be655596 | 870 | spin_unlock(&ci->i_ceph_lock); |
355da1eb | 871 | |
d9df2783 YZ |
872 | if (wake) |
873 | wake_up_all(&ci->i_cap_wq); | |
874 | ||
355da1eb SW |
875 | /* queue truncate if we saw i_size decrease */ |
876 | if (queue_trunc) | |
3c6f6b79 | 877 | ceph_queue_vmtruncate(inode); |
355da1eb SW |
878 | |
879 | /* populate frag tree */ | |
3e7fbe9c YZ |
880 | if (S_ISDIR(inode->i_mode)) |
881 | ceph_fill_fragtree(inode, &info->fragtree, dirinfo); | |
355da1eb | 882 | |
355da1eb SW |
883 | /* update delegation info? */ |
884 | if (dirinfo) | |
885 | ceph_fill_dirfrag(inode, dirinfo); | |
886 | ||
887 | err = 0; | |
355da1eb | 888 | out: |
d9df2783 YZ |
889 | if (new_cap) |
890 | ceph_put_cap(mdsc, new_cap); | |
b6c1d5b8 SW |
891 | if (xattr_blob) |
892 | ceph_buffer_put(xattr_blob); | |
355da1eb SW |
893 | return err; |
894 | } | |
895 | ||
896 | /* | |
897 | * caller should hold session s_mutex. | |
898 | */ | |
899 | static void update_dentry_lease(struct dentry *dentry, | |
900 | struct ceph_mds_reply_lease *lease, | |
901 | struct ceph_mds_session *session, | |
902 | unsigned long from_time) | |
903 | { | |
904 | struct ceph_dentry_info *di = ceph_dentry(dentry); | |
905 | long unsigned duration = le32_to_cpu(lease->duration_ms); | |
906 | long unsigned ttl = from_time + (duration * HZ) / 1000; | |
907 | long unsigned half_ttl = from_time + (duration * HZ / 2) / 1000; | |
908 | struct inode *dir; | |
909 | ||
910 | /* only track leases on regular dentries */ | |
911 | if (dentry->d_op != &ceph_dentry_ops) | |
912 | return; | |
913 | ||
914 | spin_lock(&dentry->d_lock); | |
2f90b852 SW |
915 | dout("update_dentry_lease %p duration %lu ms ttl %lu\n", |
916 | dentry, duration, ttl); | |
355da1eb SW |
917 | |
918 | /* make lease_rdcache_gen match directory */ | |
919 | dir = dentry->d_parent->d_inode; | |
920 | di->lease_shared_gen = ceph_inode(dir)->i_shared_gen; | |
921 | ||
2f90b852 | 922 | if (duration == 0) |
355da1eb SW |
923 | goto out_unlock; |
924 | ||
925 | if (di->lease_gen == session->s_cap_gen && | |
926 | time_before(ttl, dentry->d_time)) | |
927 | goto out_unlock; /* we already have a newer lease. */ | |
928 | ||
929 | if (di->lease_session && di->lease_session != session) | |
930 | goto out_unlock; | |
931 | ||
932 | ceph_dentry_lru_touch(dentry); | |
933 | ||
934 | if (!di->lease_session) | |
935 | di->lease_session = ceph_get_mds_session(session); | |
936 | di->lease_gen = session->s_cap_gen; | |
937 | di->lease_seq = le32_to_cpu(lease->seq); | |
938 | di->lease_renew_after = half_ttl; | |
939 | di->lease_renew_from = 0; | |
940 | dentry->d_time = ttl; | |
941 | out_unlock: | |
942 | spin_unlock(&dentry->d_lock); | |
943 | return; | |
944 | } | |
945 | ||
946 | /* | |
947 | * splice a dentry to an inode. | |
948 | * caller must hold directory i_mutex for this to be safe. | |
949 | * | |
950 | * we will only rehash the resulting dentry if @prehash is | |
951 | * true; @prehash will be set to false (for the benefit of | |
952 | * the caller) if we fail. | |
953 | */ | |
954 | static struct dentry *splice_dentry(struct dentry *dn, struct inode *in, | |
0a8a70f9 | 955 | bool *prehash) |
355da1eb SW |
956 | { |
957 | struct dentry *realdn; | |
958 | ||
1cd3935b SW |
959 | BUG_ON(dn->d_inode); |
960 | ||
355da1eb SW |
961 | /* dn must be unhashed */ |
962 | if (!d_unhashed(dn)) | |
963 | d_drop(dn); | |
964 | realdn = d_materialise_unique(dn, in); | |
965 | if (IS_ERR(realdn)) { | |
d69ed05a SW |
966 | pr_err("splice_dentry error %ld %p inode %p ino %llx.%llx\n", |
967 | PTR_ERR(realdn), dn, in, ceph_vinop(in)); | |
355da1eb SW |
968 | if (prehash) |
969 | *prehash = false; /* don't rehash on error */ | |
970 | dn = realdn; /* note realdn contains the error */ | |
971 | goto out; | |
972 | } else if (realdn) { | |
973 | dout("dn %p (%d) spliced with %p (%d) " | |
974 | "inode %p ino %llx.%llx\n", | |
84d08fa8 AV |
975 | dn, d_count(dn), |
976 | realdn, d_count(realdn), | |
355da1eb SW |
977 | realdn->d_inode, ceph_vinop(realdn->d_inode)); |
978 | dput(dn); | |
979 | dn = realdn; | |
980 | } else { | |
981 | BUG_ON(!ceph_dentry(dn)); | |
355da1eb SW |
982 | dout("dn %p attached to %p ino %llx.%llx\n", |
983 | dn, dn->d_inode, ceph_vinop(dn->d_inode)); | |
984 | } | |
985 | if ((!prehash || *prehash) && d_unhashed(dn)) | |
986 | d_rehash(dn); | |
987 | out: | |
988 | return dn; | |
989 | } | |
990 | ||
991 | /* | |
992 | * Incorporate results into the local cache. This is either just | |
993 | * one inode, or a directory, dentry, and possibly linked-to inode (e.g., | |
994 | * after a lookup). | |
995 | * | |
996 | * A reply may contain | |
997 | * a directory inode along with a dentry. | |
998 | * and/or a target inode | |
999 | * | |
1000 | * Called with snap_rwsem (read). | |
1001 | */ | |
1002 | int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req, | |
1003 | struct ceph_mds_session *session) | |
1004 | { | |
1005 | struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; | |
1006 | struct inode *in = NULL; | |
355da1eb | 1007 | struct ceph_vino vino; |
3d14c5d2 | 1008 | struct ceph_fs_client *fsc = ceph_sb_to_client(sb); |
355da1eb SW |
1009 | int err = 0; |
1010 | ||
1011 | dout("fill_trace %p is_dentry %d is_target %d\n", req, | |
1012 | rinfo->head->is_dentry, rinfo->head->is_target); | |
1013 | ||
1014 | #if 0 | |
1015 | /* | |
1016 | * Debugging hook: | |
1017 | * | |
1018 | * If we resend completed ops to a recovering mds, we get no | |
1019 | * trace. Since that is very rare, pretend this is the case | |
1020 | * to ensure the 'no trace' handlers in the callers behave. | |
1021 | * | |
1022 | * Fill in inodes unconditionally to avoid breaking cap | |
1023 | * invariants. | |
1024 | */ | |
1025 | if (rinfo->head->op & CEPH_MDS_OP_WRITE) { | |
1026 | pr_info("fill_trace faking empty trace on %lld %s\n", | |
1027 | req->r_tid, ceph_mds_op_name(rinfo->head->op)); | |
1028 | if (rinfo->head->is_dentry) { | |
1029 | rinfo->head->is_dentry = 0; | |
1030 | err = fill_inode(req->r_locked_dir, | |
1031 | &rinfo->diri, rinfo->dirfrag, | |
1032 | session, req->r_request_started, -1); | |
1033 | } | |
1034 | if (rinfo->head->is_target) { | |
1035 | rinfo->head->is_target = 0; | |
1036 | ininfo = rinfo->targeti.in; | |
1037 | vino.ino = le64_to_cpu(ininfo->ino); | |
1038 | vino.snap = le64_to_cpu(ininfo->snapid); | |
1039 | in = ceph_get_inode(sb, vino); | |
1040 | err = fill_inode(in, &rinfo->targeti, NULL, | |
1041 | session, req->r_request_started, | |
1042 | req->r_fmode); | |
1043 | iput(in); | |
1044 | } | |
1045 | } | |
1046 | #endif | |
1047 | ||
1048 | if (!rinfo->head->is_target && !rinfo->head->is_dentry) { | |
1049 | dout("fill_trace reply is empty!\n"); | |
167c9e35 SW |
1050 | if (rinfo->head->result == 0 && req->r_locked_dir) |
1051 | ceph_invalidate_dir_request(req); | |
355da1eb SW |
1052 | return 0; |
1053 | } | |
1054 | ||
1055 | if (rinfo->head->is_dentry) { | |
5b1daecd SW |
1056 | struct inode *dir = req->r_locked_dir; |
1057 | ||
6c5e50fa SW |
1058 | if (dir) { |
1059 | err = fill_inode(dir, &rinfo->diri, rinfo->dirfrag, | |
1060 | session, req->r_request_started, -1, | |
1061 | &req->r_caps_reservation); | |
1062 | if (err < 0) | |
19913b4e | 1063 | goto done; |
6c5e50fa SW |
1064 | } else { |
1065 | WARN_ON_ONCE(1); | |
1066 | } | |
19913b4e YZ |
1067 | |
1068 | if (dir && req->r_op == CEPH_MDS_OP_LOOKUPNAME) { | |
1069 | struct qstr dname; | |
1070 | struct dentry *dn, *parent; | |
1071 | ||
1072 | BUG_ON(!rinfo->head->is_target); | |
1073 | BUG_ON(req->r_dentry); | |
1074 | ||
1075 | parent = d_find_any_alias(dir); | |
1076 | BUG_ON(!parent); | |
1077 | ||
1078 | dname.name = rinfo->dname; | |
1079 | dname.len = rinfo->dname_len; | |
1080 | dname.hash = full_name_hash(dname.name, dname.len); | |
1081 | vino.ino = le64_to_cpu(rinfo->targeti.in->ino); | |
1082 | vino.snap = le64_to_cpu(rinfo->targeti.in->snapid); | |
1083 | retry_lookup: | |
1084 | dn = d_lookup(parent, &dname); | |
1085 | dout("d_lookup on parent=%p name=%.*s got %p\n", | |
1086 | parent, dname.len, dname.name, dn); | |
1087 | ||
1088 | if (!dn) { | |
1089 | dn = d_alloc(parent, &dname); | |
1090 | dout("d_alloc %p '%.*s' = %p\n", parent, | |
1091 | dname.len, dname.name, dn); | |
1092 | if (dn == NULL) { | |
1093 | dput(parent); | |
1094 | err = -ENOMEM; | |
1095 | goto done; | |
1096 | } | |
1097 | err = ceph_init_dentry(dn); | |
1098 | if (err < 0) { | |
1099 | dput(dn); | |
1100 | dput(parent); | |
1101 | goto done; | |
1102 | } | |
1103 | } else if (dn->d_inode && | |
1104 | (ceph_ino(dn->d_inode) != vino.ino || | |
1105 | ceph_snap(dn->d_inode) != vino.snap)) { | |
1106 | dout(" dn %p points to wrong inode %p\n", | |
1107 | dn, dn->d_inode); | |
1108 | d_delete(dn); | |
1109 | dput(dn); | |
1110 | goto retry_lookup; | |
1111 | } | |
1112 | ||
1113 | req->r_dentry = dn; | |
1114 | dput(parent); | |
1115 | } | |
5b1daecd SW |
1116 | } |
1117 | ||
86b58d13 YZ |
1118 | if (rinfo->head->is_target) { |
1119 | vino.ino = le64_to_cpu(rinfo->targeti.in->ino); | |
1120 | vino.snap = le64_to_cpu(rinfo->targeti.in->snapid); | |
1121 | ||
1122 | in = ceph_get_inode(sb, vino); | |
1123 | if (IS_ERR(in)) { | |
1124 | err = PTR_ERR(in); | |
1125 | goto done; | |
1126 | } | |
1127 | req->r_target_inode = in; | |
1128 | ||
1129 | err = fill_inode(in, &rinfo->targeti, NULL, | |
1130 | session, req->r_request_started, | |
48193012 | 1131 | (!req->r_aborted && rinfo->head->result == 0) ? |
86b58d13 YZ |
1132 | req->r_fmode : -1, |
1133 | &req->r_caps_reservation); | |
1134 | if (err < 0) { | |
1135 | pr_err("fill_inode badness %p %llx.%llx\n", | |
1136 | in, ceph_vinop(in)); | |
1137 | goto done; | |
1138 | } | |
1139 | } | |
1140 | ||
9358c6d4 SW |
1141 | /* |
1142 | * ignore null lease/binding on snapdir ENOENT, or else we | |
1143 | * will have trouble splicing in the virtual snapdir later | |
1144 | */ | |
1145 | if (rinfo->head->is_dentry && !req->r_aborted && | |
6c5e50fa | 1146 | req->r_locked_dir && |
9358c6d4 | 1147 | (rinfo->head->is_target || strncmp(req->r_dentry->d_name.name, |
3d14c5d2 | 1148 | fsc->mount_options->snapdir_name, |
9358c6d4 | 1149 | req->r_dentry->d_name.len))) { |
355da1eb SW |
1150 | /* |
1151 | * lookup link rename : null -> possibly existing inode | |
1152 | * mknod symlink mkdir : null -> new inode | |
1153 | * unlink : linked -> null | |
1154 | */ | |
1155 | struct inode *dir = req->r_locked_dir; | |
1156 | struct dentry *dn = req->r_dentry; | |
1157 | bool have_dir_cap, have_lease; | |
1158 | ||
1159 | BUG_ON(!dn); | |
1160 | BUG_ON(!dir); | |
1161 | BUG_ON(dn->d_parent->d_inode != dir); | |
1162 | BUG_ON(ceph_ino(dir) != | |
1163 | le64_to_cpu(rinfo->diri.in->ino)); | |
1164 | BUG_ON(ceph_snap(dir) != | |
1165 | le64_to_cpu(rinfo->diri.in->snapid)); | |
1166 | ||
355da1eb SW |
1167 | /* do we have a lease on the whole dir? */ |
1168 | have_dir_cap = | |
1169 | (le32_to_cpu(rinfo->diri.in->cap.caps) & | |
1170 | CEPH_CAP_FILE_SHARED); | |
1171 | ||
1172 | /* do we have a dn lease? */ | |
1173 | have_lease = have_dir_cap || | |
2f90b852 | 1174 | le32_to_cpu(rinfo->dlease->duration_ms); |
355da1eb SW |
1175 | if (!have_lease) |
1176 | dout("fill_trace no dentry lease or dir cap\n"); | |
1177 | ||
1178 | /* rename? */ | |
1179 | if (req->r_old_dentry && req->r_op == CEPH_MDS_OP_RENAME) { | |
0a8a70f9 YZ |
1180 | struct inode *olddir = req->r_old_dentry_dir; |
1181 | BUG_ON(!olddir); | |
1182 | ||
355da1eb SW |
1183 | dout(" src %p '%.*s' dst %p '%.*s'\n", |
1184 | req->r_old_dentry, | |
1185 | req->r_old_dentry->d_name.len, | |
1186 | req->r_old_dentry->d_name.name, | |
1187 | dn, dn->d_name.len, dn->d_name.name); | |
1188 | dout("fill_trace doing d_move %p -> %p\n", | |
1189 | req->r_old_dentry, dn); | |
c10f5e12 | 1190 | |
355da1eb SW |
1191 | d_move(req->r_old_dentry, dn); |
1192 | dout(" src %p '%.*s' dst %p '%.*s'\n", | |
1193 | req->r_old_dentry, | |
1194 | req->r_old_dentry->d_name.len, | |
1195 | req->r_old_dentry->d_name.name, | |
1196 | dn, dn->d_name.len, dn->d_name.name); | |
81a6cf2d | 1197 | |
c4a29f26 SW |
1198 | /* ensure target dentry is invalidated, despite |
1199 | rehashing bug in vfs_rename_dir */ | |
81a6cf2d SW |
1200 | ceph_invalidate_dentry_lease(dn); |
1201 | ||
0a8a70f9 YZ |
1202 | /* d_move screws up sibling dentries' offsets */ |
1203 | ceph_dir_clear_complete(dir); | |
1204 | ceph_dir_clear_complete(olddir); | |
1205 | ||
99ccbd22 | 1206 | dout("dn %p gets new offset %lld\n", req->r_old_dentry, |
1cd3935b | 1207 | ceph_dentry(req->r_old_dentry)->offset); |
81a6cf2d | 1208 | |
355da1eb | 1209 | dn = req->r_old_dentry; /* use old_dentry */ |
355da1eb SW |
1210 | } |
1211 | ||
1212 | /* null dentry? */ | |
1213 | if (!rinfo->head->is_target) { | |
1214 | dout("fill_trace null dentry\n"); | |
1215 | if (dn->d_inode) { | |
1216 | dout("d_delete %p\n", dn); | |
1217 | d_delete(dn); | |
1218 | } else { | |
1219 | dout("d_instantiate %p NULL\n", dn); | |
1220 | d_instantiate(dn, NULL); | |
1221 | if (have_lease && d_unhashed(dn)) | |
1222 | d_rehash(dn); | |
1223 | update_dentry_lease(dn, rinfo->dlease, | |
1224 | session, | |
1225 | req->r_request_started); | |
1226 | } | |
1227 | goto done; | |
1228 | } | |
1229 | ||
1230 | /* attach proper inode */ | |
86b58d13 | 1231 | if (!dn->d_inode) { |
0a8a70f9 | 1232 | ceph_dir_clear_complete(dir); |
86b58d13 | 1233 | ihold(in); |
0a8a70f9 | 1234 | dn = splice_dentry(dn, in, &have_lease); |
355da1eb SW |
1235 | if (IS_ERR(dn)) { |
1236 | err = PTR_ERR(dn); | |
1237 | goto done; | |
1238 | } | |
1239 | req->r_dentry = dn; /* may have spliced */ | |
86b58d13 | 1240 | } else if (dn->d_inode && dn->d_inode != in) { |
355da1eb | 1241 | dout(" %p links to %p %llx.%llx, not %llx.%llx\n", |
86b58d13 YZ |
1242 | dn, dn->d_inode, ceph_vinop(dn->d_inode), |
1243 | ceph_vinop(in)); | |
355da1eb | 1244 | have_lease = false; |
355da1eb SW |
1245 | } |
1246 | ||
1247 | if (have_lease) | |
1248 | update_dentry_lease(dn, rinfo->dlease, session, | |
1249 | req->r_request_started); | |
1250 | dout(" final dn %p\n", dn); | |
86b58d13 YZ |
1251 | } else if (!req->r_aborted && |
1252 | (req->r_op == CEPH_MDS_OP_LOOKUPSNAP || | |
1253 | req->r_op == CEPH_MDS_OP_MKSNAP)) { | |
355da1eb | 1254 | struct dentry *dn = req->r_dentry; |
0a8a70f9 | 1255 | struct inode *dir = req->r_locked_dir; |
355da1eb SW |
1256 | |
1257 | /* fill out a snapdir LOOKUPSNAP dentry */ | |
1258 | BUG_ON(!dn); | |
0a8a70f9 YZ |
1259 | BUG_ON(!dir); |
1260 | BUG_ON(ceph_snap(dir) != CEPH_SNAPDIR); | |
355da1eb | 1261 | dout(" linking snapped dir %p to dn %p\n", in, dn); |
0a8a70f9 | 1262 | ceph_dir_clear_complete(dir); |
86b58d13 | 1263 | ihold(in); |
0a8a70f9 | 1264 | dn = splice_dentry(dn, in, NULL); |
355da1eb SW |
1265 | if (IS_ERR(dn)) { |
1266 | err = PTR_ERR(dn); | |
1267 | goto done; | |
1268 | } | |
1269 | req->r_dentry = dn; /* may have spliced */ | |
355da1eb | 1270 | } |
355da1eb SW |
1271 | done: |
1272 | dout("fill_trace done err=%d\n", err); | |
1273 | return err; | |
1274 | } | |
1275 | ||
1276 | /* | |
1277 | * Prepopulate our cache with readdir results, leases, etc. | |
1278 | */ | |
79f9f99a SW |
1279 | static int readdir_prepopulate_inodes_only(struct ceph_mds_request *req, |
1280 | struct ceph_mds_session *session) | |
1281 | { | |
1282 | struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; | |
1283 | int i, err = 0; | |
1284 | ||
1285 | for (i = 0; i < rinfo->dir_nr; i++) { | |
1286 | struct ceph_vino vino; | |
1287 | struct inode *in; | |
1288 | int rc; | |
1289 | ||
1290 | vino.ino = le64_to_cpu(rinfo->dir_in[i].in->ino); | |
1291 | vino.snap = le64_to_cpu(rinfo->dir_in[i].in->snapid); | |
1292 | ||
1293 | in = ceph_get_inode(req->r_dentry->d_sb, vino); | |
1294 | if (IS_ERR(in)) { | |
1295 | err = PTR_ERR(in); | |
1296 | dout("new_inode badness got %d\n", err); | |
1297 | continue; | |
1298 | } | |
1299 | rc = fill_inode(in, &rinfo->dir_in[i], NULL, session, | |
1300 | req->r_request_started, -1, | |
1301 | &req->r_caps_reservation); | |
1302 | if (rc < 0) { | |
1303 | pr_err("fill_inode badness on %p got %d\n", in, rc); | |
1304 | err = rc; | |
1305 | continue; | |
1306 | } | |
1307 | } | |
1308 | ||
1309 | return err; | |
1310 | } | |
1311 | ||
355da1eb SW |
1312 | int ceph_readdir_prepopulate(struct ceph_mds_request *req, |
1313 | struct ceph_mds_session *session) | |
1314 | { | |
1315 | struct dentry *parent = req->r_dentry; | |
1316 | struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; | |
1317 | struct qstr dname; | |
1318 | struct dentry *dn; | |
1319 | struct inode *in; | |
86b58d13 | 1320 | int err = 0, ret, i; |
355da1eb SW |
1321 | struct inode *snapdir = NULL; |
1322 | struct ceph_mds_request_head *rhead = req->r_request->front.iov_base; | |
355da1eb | 1323 | struct ceph_dentry_info *di; |
81c6aea5 YZ |
1324 | u64 r_readdir_offset = req->r_readdir_offset; |
1325 | u32 frag = le32_to_cpu(rhead->args.readdir.frag); | |
1326 | ||
1327 | if (rinfo->dir_dir && | |
1328 | le32_to_cpu(rinfo->dir_dir->frag) != frag) { | |
1329 | dout("readdir_prepopulate got new frag %x -> %x\n", | |
1330 | frag, le32_to_cpu(rinfo->dir_dir->frag)); | |
1331 | frag = le32_to_cpu(rinfo->dir_dir->frag); | |
1332 | if (ceph_frag_is_leftmost(frag)) | |
1333 | r_readdir_offset = 2; | |
1334 | else | |
1335 | r_readdir_offset = 0; | |
1336 | } | |
355da1eb | 1337 | |
79f9f99a SW |
1338 | if (req->r_aborted) |
1339 | return readdir_prepopulate_inodes_only(req, session); | |
355da1eb SW |
1340 | |
1341 | if (le32_to_cpu(rinfo->head->op) == CEPH_MDS_OP_LSSNAP) { | |
1342 | snapdir = ceph_get_snapdir(parent->d_inode); | |
1343 | parent = d_find_alias(snapdir); | |
1344 | dout("readdir_prepopulate %d items under SNAPDIR dn %p\n", | |
1345 | rinfo->dir_nr, parent); | |
1346 | } else { | |
1347 | dout("readdir_prepopulate %d items under dn %p\n", | |
1348 | rinfo->dir_nr, parent); | |
1349 | if (rinfo->dir_dir) | |
1350 | ceph_fill_dirfrag(parent->d_inode, rinfo->dir_dir); | |
1351 | } | |
1352 | ||
86b58d13 | 1353 | /* FIXME: release caps/leases if error occurs */ |
355da1eb SW |
1354 | for (i = 0; i < rinfo->dir_nr; i++) { |
1355 | struct ceph_vino vino; | |
1356 | ||
1357 | dname.name = rinfo->dir_dname[i]; | |
1358 | dname.len = rinfo->dir_dname_len[i]; | |
1359 | dname.hash = full_name_hash(dname.name, dname.len); | |
1360 | ||
1361 | vino.ino = le64_to_cpu(rinfo->dir_in[i].in->ino); | |
1362 | vino.snap = le64_to_cpu(rinfo->dir_in[i].in->snapid); | |
1363 | ||
1364 | retry_lookup: | |
1365 | dn = d_lookup(parent, &dname); | |
1366 | dout("d_lookup on parent=%p name=%.*s got %p\n", | |
1367 | parent, dname.len, dname.name, dn); | |
1368 | ||
1369 | if (!dn) { | |
1370 | dn = d_alloc(parent, &dname); | |
1371 | dout("d_alloc %p '%.*s' = %p\n", parent, | |
1372 | dname.len, dname.name, dn); | |
1373 | if (dn == NULL) { | |
1374 | dout("d_alloc badness\n"); | |
1375 | err = -ENOMEM; | |
1376 | goto out; | |
1377 | } | |
86b58d13 YZ |
1378 | ret = ceph_init_dentry(dn); |
1379 | if (ret < 0) { | |
8c696737 | 1380 | dput(dn); |
86b58d13 | 1381 | err = ret; |
355da1eb | 1382 | goto out; |
8c696737 | 1383 | } |
355da1eb SW |
1384 | } else if (dn->d_inode && |
1385 | (ceph_ino(dn->d_inode) != vino.ino || | |
1386 | ceph_snap(dn->d_inode) != vino.snap)) { | |
1387 | dout(" dn %p points to wrong inode %p\n", | |
1388 | dn, dn->d_inode); | |
1389 | d_delete(dn); | |
1390 | dput(dn); | |
1391 | goto retry_lookup; | |
1392 | } else { | |
1393 | /* reorder parent's d_subdirs */ | |
2fd6b7f5 NP |
1394 | spin_lock(&parent->d_lock); |
1395 | spin_lock_nested(&dn->d_lock, DENTRY_D_LOCK_NESTED); | |
355da1eb SW |
1396 | list_move(&dn->d_u.d_child, &parent->d_subdirs); |
1397 | spin_unlock(&dn->d_lock); | |
2fd6b7f5 | 1398 | spin_unlock(&parent->d_lock); |
355da1eb SW |
1399 | } |
1400 | ||
355da1eb SW |
1401 | /* inode */ |
1402 | if (dn->d_inode) { | |
1403 | in = dn->d_inode; | |
1404 | } else { | |
1405 | in = ceph_get_inode(parent->d_sb, vino); | |
ac1f12ef | 1406 | if (IS_ERR(in)) { |
355da1eb | 1407 | dout("new_inode badness\n"); |
2744c171 | 1408 | d_drop(dn); |
355da1eb | 1409 | dput(dn); |
ac1f12ef | 1410 | err = PTR_ERR(in); |
355da1eb SW |
1411 | goto out; |
1412 | } | |
355da1eb SW |
1413 | } |
1414 | ||
1415 | if (fill_inode(in, &rinfo->dir_in[i], NULL, session, | |
1416 | req->r_request_started, -1, | |
1417 | &req->r_caps_reservation) < 0) { | |
1418 | pr_err("fill_inode badness on %p\n", in); | |
86b58d13 YZ |
1419 | if (!dn->d_inode) |
1420 | iput(in); | |
1421 | d_drop(dn); | |
d69ed05a | 1422 | goto next_item; |
355da1eb | 1423 | } |
86b58d13 YZ |
1424 | |
1425 | if (!dn->d_inode) { | |
0a8a70f9 | 1426 | dn = splice_dentry(dn, in, NULL); |
86b58d13 YZ |
1427 | if (IS_ERR(dn)) { |
1428 | err = PTR_ERR(dn); | |
1429 | dn = NULL; | |
1430 | goto next_item; | |
1431 | } | |
1432 | } | |
1433 | ||
1434 | di = dn->d_fsdata; | |
1435 | di->offset = ceph_make_fpos(frag, i + r_readdir_offset); | |
1436 | ||
1437 | update_dentry_lease(dn, rinfo->dir_dlease[i], | |
1438 | req->r_session, | |
1439 | req->r_request_started); | |
d69ed05a SW |
1440 | next_item: |
1441 | if (dn) | |
1442 | dput(dn); | |
355da1eb | 1443 | } |
86b58d13 YZ |
1444 | if (err == 0) |
1445 | req->r_did_prepopulate = true; | |
355da1eb SW |
1446 | |
1447 | out: | |
1448 | if (snapdir) { | |
1449 | iput(snapdir); | |
1450 | dput(parent); | |
1451 | } | |
1452 | dout("readdir_prepopulate done\n"); | |
1453 | return err; | |
1454 | } | |
1455 | ||
1456 | int ceph_inode_set_size(struct inode *inode, loff_t size) | |
1457 | { | |
1458 | struct ceph_inode_info *ci = ceph_inode(inode); | |
1459 | int ret = 0; | |
1460 | ||
be655596 | 1461 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
1462 | dout("set_size %p %llu -> %llu\n", inode, inode->i_size, size); |
1463 | inode->i_size = size; | |
1464 | inode->i_blocks = (size + (1 << 9) - 1) >> 9; | |
1465 | ||
1466 | /* tell the MDS if we are approaching max_size */ | |
1467 | if ((size << 1) >= ci->i_max_size && | |
1468 | (ci->i_reported_size << 1) < ci->i_max_size) | |
1469 | ret = 1; | |
1470 | ||
be655596 | 1471 | spin_unlock(&ci->i_ceph_lock); |
355da1eb SW |
1472 | return ret; |
1473 | } | |
1474 | ||
1475 | /* | |
1476 | * Write back inode data in a worker thread. (This can't be done | |
1477 | * in the message handler context.) | |
1478 | */ | |
3c6f6b79 SW |
1479 | void ceph_queue_writeback(struct inode *inode) |
1480 | { | |
15a2015f | 1481 | ihold(inode); |
3c6f6b79 SW |
1482 | if (queue_work(ceph_inode_to_client(inode)->wb_wq, |
1483 | &ceph_inode(inode)->i_wb_work)) { | |
2c27c9a5 | 1484 | dout("ceph_queue_writeback %p\n", inode); |
3c6f6b79 | 1485 | } else { |
2c27c9a5 | 1486 | dout("ceph_queue_writeback %p failed\n", inode); |
15a2015f | 1487 | iput(inode); |
3c6f6b79 SW |
1488 | } |
1489 | } | |
1490 | ||
1491 | static void ceph_writeback_work(struct work_struct *work) | |
355da1eb SW |
1492 | { |
1493 | struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info, | |
1494 | i_wb_work); | |
1495 | struct inode *inode = &ci->vfs_inode; | |
1496 | ||
1497 | dout("writeback %p\n", inode); | |
1498 | filemap_fdatawrite(&inode->i_data); | |
1499 | iput(inode); | |
1500 | } | |
1501 | ||
3c6f6b79 SW |
1502 | /* |
1503 | * queue an async invalidation | |
1504 | */ | |
1505 | void ceph_queue_invalidate(struct inode *inode) | |
1506 | { | |
15a2015f | 1507 | ihold(inode); |
3c6f6b79 SW |
1508 | if (queue_work(ceph_inode_to_client(inode)->pg_inv_wq, |
1509 | &ceph_inode(inode)->i_pg_inv_work)) { | |
1510 | dout("ceph_queue_invalidate %p\n", inode); | |
3c6f6b79 SW |
1511 | } else { |
1512 | dout("ceph_queue_invalidate %p failed\n", inode); | |
15a2015f | 1513 | iput(inode); |
3c6f6b79 SW |
1514 | } |
1515 | } | |
1516 | ||
355da1eb SW |
1517 | /* |
1518 | * Invalidate inode pages in a worker thread. (This can't be done | |
1519 | * in the message handler context.) | |
1520 | */ | |
3c6f6b79 | 1521 | static void ceph_invalidate_work(struct work_struct *work) |
355da1eb SW |
1522 | { |
1523 | struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info, | |
1524 | i_pg_inv_work); | |
1525 | struct inode *inode = &ci->vfs_inode; | |
1526 | u32 orig_gen; | |
1527 | int check = 0; | |
1528 | ||
b0d7c223 | 1529 | mutex_lock(&ci->i_truncate_mutex); |
be655596 | 1530 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
1531 | dout("invalidate_pages %p gen %d revoking %d\n", inode, |
1532 | ci->i_rdcache_gen, ci->i_rdcache_revoking); | |
cd045cb4 | 1533 | if (ci->i_rdcache_revoking != ci->i_rdcache_gen) { |
9563f88c YZ |
1534 | if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE)) |
1535 | check = 1; | |
be655596 | 1536 | spin_unlock(&ci->i_ceph_lock); |
b0d7c223 | 1537 | mutex_unlock(&ci->i_truncate_mutex); |
355da1eb SW |
1538 | goto out; |
1539 | } | |
1540 | orig_gen = ci->i_rdcache_gen; | |
be655596 | 1541 | spin_unlock(&ci->i_ceph_lock); |
355da1eb | 1542 | |
b0d7c223 | 1543 | truncate_inode_pages(inode->i_mapping, 0); |
355da1eb | 1544 | |
be655596 | 1545 | spin_lock(&ci->i_ceph_lock); |
cd045cb4 SW |
1546 | if (orig_gen == ci->i_rdcache_gen && |
1547 | orig_gen == ci->i_rdcache_revoking) { | |
355da1eb SW |
1548 | dout("invalidate_pages %p gen %d successful\n", inode, |
1549 | ci->i_rdcache_gen); | |
cd045cb4 | 1550 | ci->i_rdcache_revoking--; |
355da1eb SW |
1551 | check = 1; |
1552 | } else { | |
cd045cb4 SW |
1553 | dout("invalidate_pages %p gen %d raced, now %d revoking %d\n", |
1554 | inode, orig_gen, ci->i_rdcache_gen, | |
1555 | ci->i_rdcache_revoking); | |
9563f88c YZ |
1556 | if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE)) |
1557 | check = 1; | |
355da1eb | 1558 | } |
be655596 | 1559 | spin_unlock(&ci->i_ceph_lock); |
b0d7c223 | 1560 | mutex_unlock(&ci->i_truncate_mutex); |
9563f88c | 1561 | out: |
355da1eb SW |
1562 | if (check) |
1563 | ceph_check_caps(ci, 0, NULL); | |
355da1eb SW |
1564 | iput(inode); |
1565 | } | |
1566 | ||
1567 | ||
1568 | /* | |
3f99969f | 1569 | * called by trunc_wq; |
355da1eb SW |
1570 | * |
1571 | * We also truncate in a separate thread as well. | |
1572 | */ | |
3c6f6b79 | 1573 | static void ceph_vmtruncate_work(struct work_struct *work) |
355da1eb SW |
1574 | { |
1575 | struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info, | |
1576 | i_vmtruncate_work); | |
1577 | struct inode *inode = &ci->vfs_inode; | |
1578 | ||
1579 | dout("vmtruncate_work %p\n", inode); | |
b415bf4f | 1580 | __ceph_do_pending_vmtruncate(inode); |
355da1eb SW |
1581 | iput(inode); |
1582 | } | |
1583 | ||
3c6f6b79 SW |
1584 | /* |
1585 | * Queue an async vmtruncate. If we fail to queue work, we will handle | |
1586 | * the truncation the next time we call __ceph_do_pending_vmtruncate. | |
1587 | */ | |
1588 | void ceph_queue_vmtruncate(struct inode *inode) | |
1589 | { | |
1590 | struct ceph_inode_info *ci = ceph_inode(inode); | |
1591 | ||
15a2015f | 1592 | ihold(inode); |
99ccbd22 | 1593 | |
640ef79d | 1594 | if (queue_work(ceph_sb_to_client(inode->i_sb)->trunc_wq, |
3c6f6b79 SW |
1595 | &ci->i_vmtruncate_work)) { |
1596 | dout("ceph_queue_vmtruncate %p\n", inode); | |
3c6f6b79 SW |
1597 | } else { |
1598 | dout("ceph_queue_vmtruncate %p failed, pending=%d\n", | |
1599 | inode, ci->i_truncate_pending); | |
15a2015f | 1600 | iput(inode); |
3c6f6b79 SW |
1601 | } |
1602 | } | |
1603 | ||
355da1eb | 1604 | /* |
355da1eb SW |
1605 | * Make sure any pending truncation is applied before doing anything |
1606 | * that may depend on it. | |
1607 | */ | |
b415bf4f | 1608 | void __ceph_do_pending_vmtruncate(struct inode *inode) |
355da1eb SW |
1609 | { |
1610 | struct ceph_inode_info *ci = ceph_inode(inode); | |
1611 | u64 to; | |
a85f50b6 | 1612 | int wrbuffer_refs, finish = 0; |
355da1eb | 1613 | |
b0d7c223 | 1614 | mutex_lock(&ci->i_truncate_mutex); |
355da1eb | 1615 | retry: |
be655596 | 1616 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
1617 | if (ci->i_truncate_pending == 0) { |
1618 | dout("__do_pending_vmtruncate %p none pending\n", inode); | |
be655596 | 1619 | spin_unlock(&ci->i_ceph_lock); |
b0d7c223 | 1620 | mutex_unlock(&ci->i_truncate_mutex); |
355da1eb SW |
1621 | return; |
1622 | } | |
1623 | ||
1624 | /* | |
1625 | * make sure any dirty snapped pages are flushed before we | |
1626 | * possibly truncate them.. so write AND block! | |
1627 | */ | |
1628 | if (ci->i_wrbuffer_ref_head < ci->i_wrbuffer_ref) { | |
1629 | dout("__do_pending_vmtruncate %p flushing snaps first\n", | |
1630 | inode); | |
be655596 | 1631 | spin_unlock(&ci->i_ceph_lock); |
355da1eb SW |
1632 | filemap_write_and_wait_range(&inode->i_data, 0, |
1633 | inode->i_sb->s_maxbytes); | |
1634 | goto retry; | |
1635 | } | |
1636 | ||
b0d7c223 YZ |
1637 | /* there should be no reader or writer */ |
1638 | WARN_ON_ONCE(ci->i_rd_ref || ci->i_wr_ref); | |
1639 | ||
355da1eb SW |
1640 | to = ci->i_truncate_size; |
1641 | wrbuffer_refs = ci->i_wrbuffer_ref; | |
1642 | dout("__do_pending_vmtruncate %p (%d) to %lld\n", inode, | |
1643 | ci->i_truncate_pending, to); | |
be655596 | 1644 | spin_unlock(&ci->i_ceph_lock); |
355da1eb SW |
1645 | |
1646 | truncate_inode_pages(inode->i_mapping, to); | |
1647 | ||
be655596 | 1648 | spin_lock(&ci->i_ceph_lock); |
a85f50b6 YZ |
1649 | if (to == ci->i_truncate_size) { |
1650 | ci->i_truncate_pending = 0; | |
1651 | finish = 1; | |
1652 | } | |
be655596 | 1653 | spin_unlock(&ci->i_ceph_lock); |
a85f50b6 YZ |
1654 | if (!finish) |
1655 | goto retry; | |
355da1eb | 1656 | |
b0d7c223 YZ |
1657 | mutex_unlock(&ci->i_truncate_mutex); |
1658 | ||
355da1eb SW |
1659 | if (wrbuffer_refs == 0) |
1660 | ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL); | |
a85f50b6 YZ |
1661 | |
1662 | wake_up_all(&ci->i_cap_wq); | |
355da1eb SW |
1663 | } |
1664 | ||
355da1eb SW |
1665 | /* |
1666 | * symlinks | |
1667 | */ | |
1668 | static void *ceph_sym_follow_link(struct dentry *dentry, struct nameidata *nd) | |
1669 | { | |
1670 | struct ceph_inode_info *ci = ceph_inode(dentry->d_inode); | |
1671 | nd_set_link(nd, ci->i_symlink); | |
1672 | return NULL; | |
1673 | } | |
1674 | ||
1675 | static const struct inode_operations ceph_symlink_iops = { | |
1676 | .readlink = generic_readlink, | |
1677 | .follow_link = ceph_sym_follow_link, | |
0b932672 YZ |
1678 | .setattr = ceph_setattr, |
1679 | .getattr = ceph_getattr, | |
1680 | .setxattr = ceph_setxattr, | |
1681 | .getxattr = ceph_getxattr, | |
1682 | .listxattr = ceph_listxattr, | |
1683 | .removexattr = ceph_removexattr, | |
355da1eb SW |
1684 | }; |
1685 | ||
1686 | /* | |
1687 | * setattr | |
1688 | */ | |
1689 | int ceph_setattr(struct dentry *dentry, struct iattr *attr) | |
1690 | { | |
1691 | struct inode *inode = dentry->d_inode; | |
1692 | struct ceph_inode_info *ci = ceph_inode(inode); | |
355da1eb SW |
1693 | const unsigned int ia_valid = attr->ia_valid; |
1694 | struct ceph_mds_request *req; | |
3d14c5d2 | 1695 | struct ceph_mds_client *mdsc = ceph_sb_to_client(dentry->d_sb)->mdsc; |
355da1eb SW |
1696 | int issued; |
1697 | int release = 0, dirtied = 0; | |
1698 | int mask = 0; | |
1699 | int err = 0; | |
fca65b4a | 1700 | int inode_dirty_flags = 0; |
355da1eb SW |
1701 | |
1702 | if (ceph_snap(inode) != CEPH_NOSNAP) | |
1703 | return -EROFS; | |
1704 | ||
355da1eb SW |
1705 | err = inode_change_ok(inode, attr); |
1706 | if (err != 0) | |
1707 | return err; | |
1708 | ||
1709 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETATTR, | |
1710 | USE_AUTH_MDS); | |
1711 | if (IS_ERR(req)) | |
1712 | return PTR_ERR(req); | |
1713 | ||
be655596 | 1714 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
1715 | issued = __ceph_caps_issued(ci, NULL); |
1716 | dout("setattr %p issued %s\n", inode, ceph_cap_string(issued)); | |
1717 | ||
1718 | if (ia_valid & ATTR_UID) { | |
1719 | dout("setattr %p uid %d -> %d\n", inode, | |
bd2bae6a EB |
1720 | from_kuid(&init_user_ns, inode->i_uid), |
1721 | from_kuid(&init_user_ns, attr->ia_uid)); | |
355da1eb SW |
1722 | if (issued & CEPH_CAP_AUTH_EXCL) { |
1723 | inode->i_uid = attr->ia_uid; | |
1724 | dirtied |= CEPH_CAP_AUTH_EXCL; | |
1725 | } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || | |
ab871b90 EB |
1726 | !uid_eq(attr->ia_uid, inode->i_uid)) { |
1727 | req->r_args.setattr.uid = cpu_to_le32( | |
1728 | from_kuid(&init_user_ns, attr->ia_uid)); | |
355da1eb SW |
1729 | mask |= CEPH_SETATTR_UID; |
1730 | release |= CEPH_CAP_AUTH_SHARED; | |
1731 | } | |
1732 | } | |
1733 | if (ia_valid & ATTR_GID) { | |
1734 | dout("setattr %p gid %d -> %d\n", inode, | |
bd2bae6a EB |
1735 | from_kgid(&init_user_ns, inode->i_gid), |
1736 | from_kgid(&init_user_ns, attr->ia_gid)); | |
355da1eb SW |
1737 | if (issued & CEPH_CAP_AUTH_EXCL) { |
1738 | inode->i_gid = attr->ia_gid; | |
1739 | dirtied |= CEPH_CAP_AUTH_EXCL; | |
1740 | } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || | |
ab871b90 EB |
1741 | !gid_eq(attr->ia_gid, inode->i_gid)) { |
1742 | req->r_args.setattr.gid = cpu_to_le32( | |
1743 | from_kgid(&init_user_ns, attr->ia_gid)); | |
355da1eb SW |
1744 | mask |= CEPH_SETATTR_GID; |
1745 | release |= CEPH_CAP_AUTH_SHARED; | |
1746 | } | |
1747 | } | |
1748 | if (ia_valid & ATTR_MODE) { | |
1749 | dout("setattr %p mode 0%o -> 0%o\n", inode, inode->i_mode, | |
1750 | attr->ia_mode); | |
1751 | if (issued & CEPH_CAP_AUTH_EXCL) { | |
1752 | inode->i_mode = attr->ia_mode; | |
1753 | dirtied |= CEPH_CAP_AUTH_EXCL; | |
1754 | } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || | |
1755 | attr->ia_mode != inode->i_mode) { | |
7221fe4c | 1756 | inode->i_mode = attr->ia_mode; |
355da1eb SW |
1757 | req->r_args.setattr.mode = cpu_to_le32(attr->ia_mode); |
1758 | mask |= CEPH_SETATTR_MODE; | |
1759 | release |= CEPH_CAP_AUTH_SHARED; | |
1760 | } | |
1761 | } | |
1762 | ||
1763 | if (ia_valid & ATTR_ATIME) { | |
1764 | dout("setattr %p atime %ld.%ld -> %ld.%ld\n", inode, | |
1765 | inode->i_atime.tv_sec, inode->i_atime.tv_nsec, | |
1766 | attr->ia_atime.tv_sec, attr->ia_atime.tv_nsec); | |
1767 | if (issued & CEPH_CAP_FILE_EXCL) { | |
1768 | ci->i_time_warp_seq++; | |
1769 | inode->i_atime = attr->ia_atime; | |
1770 | dirtied |= CEPH_CAP_FILE_EXCL; | |
1771 | } else if ((issued & CEPH_CAP_FILE_WR) && | |
1772 | timespec_compare(&inode->i_atime, | |
1773 | &attr->ia_atime) < 0) { | |
1774 | inode->i_atime = attr->ia_atime; | |
1775 | dirtied |= CEPH_CAP_FILE_WR; | |
1776 | } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || | |
1777 | !timespec_equal(&inode->i_atime, &attr->ia_atime)) { | |
1778 | ceph_encode_timespec(&req->r_args.setattr.atime, | |
1779 | &attr->ia_atime); | |
1780 | mask |= CEPH_SETATTR_ATIME; | |
1781 | release |= CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_RD | | |
1782 | CEPH_CAP_FILE_WR; | |
1783 | } | |
1784 | } | |
1785 | if (ia_valid & ATTR_MTIME) { | |
1786 | dout("setattr %p mtime %ld.%ld -> %ld.%ld\n", inode, | |
1787 | inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec, | |
1788 | attr->ia_mtime.tv_sec, attr->ia_mtime.tv_nsec); | |
1789 | if (issued & CEPH_CAP_FILE_EXCL) { | |
1790 | ci->i_time_warp_seq++; | |
1791 | inode->i_mtime = attr->ia_mtime; | |
1792 | dirtied |= CEPH_CAP_FILE_EXCL; | |
1793 | } else if ((issued & CEPH_CAP_FILE_WR) && | |
1794 | timespec_compare(&inode->i_mtime, | |
1795 | &attr->ia_mtime) < 0) { | |
1796 | inode->i_mtime = attr->ia_mtime; | |
1797 | dirtied |= CEPH_CAP_FILE_WR; | |
1798 | } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || | |
1799 | !timespec_equal(&inode->i_mtime, &attr->ia_mtime)) { | |
1800 | ceph_encode_timespec(&req->r_args.setattr.mtime, | |
1801 | &attr->ia_mtime); | |
1802 | mask |= CEPH_SETATTR_MTIME; | |
1803 | release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_RD | | |
1804 | CEPH_CAP_FILE_WR; | |
1805 | } | |
1806 | } | |
1807 | if (ia_valid & ATTR_SIZE) { | |
1808 | dout("setattr %p size %lld -> %lld\n", inode, | |
1809 | inode->i_size, attr->ia_size); | |
1810 | if (attr->ia_size > inode->i_sb->s_maxbytes) { | |
1811 | err = -EINVAL; | |
1812 | goto out; | |
1813 | } | |
1814 | if ((issued & CEPH_CAP_FILE_EXCL) && | |
1815 | attr->ia_size > inode->i_size) { | |
1816 | inode->i_size = attr->ia_size; | |
355da1eb SW |
1817 | inode->i_blocks = |
1818 | (attr->ia_size + (1 << 9) - 1) >> 9; | |
1819 | inode->i_ctime = attr->ia_ctime; | |
1820 | ci->i_reported_size = attr->ia_size; | |
1821 | dirtied |= CEPH_CAP_FILE_EXCL; | |
1822 | } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || | |
1823 | attr->ia_size != inode->i_size) { | |
1824 | req->r_args.setattr.size = cpu_to_le64(attr->ia_size); | |
1825 | req->r_args.setattr.old_size = | |
1826 | cpu_to_le64(inode->i_size); | |
1827 | mask |= CEPH_SETATTR_SIZE; | |
1828 | release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_RD | | |
1829 | CEPH_CAP_FILE_WR; | |
1830 | } | |
1831 | } | |
1832 | ||
1833 | /* these do nothing */ | |
1834 | if (ia_valid & ATTR_CTIME) { | |
1835 | bool only = (ia_valid & (ATTR_SIZE|ATTR_MTIME|ATTR_ATIME| | |
1836 | ATTR_MODE|ATTR_UID|ATTR_GID)) == 0; | |
1837 | dout("setattr %p ctime %ld.%ld -> %ld.%ld (%s)\n", inode, | |
1838 | inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec, | |
1839 | attr->ia_ctime.tv_sec, attr->ia_ctime.tv_nsec, | |
1840 | only ? "ctime only" : "ignored"); | |
1841 | inode->i_ctime = attr->ia_ctime; | |
1842 | if (only) { | |
1843 | /* | |
1844 | * if kernel wants to dirty ctime but nothing else, | |
1845 | * we need to choose a cap to dirty under, or do | |
1846 | * a almost-no-op setattr | |
1847 | */ | |
1848 | if (issued & CEPH_CAP_AUTH_EXCL) | |
1849 | dirtied |= CEPH_CAP_AUTH_EXCL; | |
1850 | else if (issued & CEPH_CAP_FILE_EXCL) | |
1851 | dirtied |= CEPH_CAP_FILE_EXCL; | |
1852 | else if (issued & CEPH_CAP_XATTR_EXCL) | |
1853 | dirtied |= CEPH_CAP_XATTR_EXCL; | |
1854 | else | |
1855 | mask |= CEPH_SETATTR_CTIME; | |
1856 | } | |
1857 | } | |
1858 | if (ia_valid & ATTR_FILE) | |
1859 | dout("setattr %p ATTR_FILE ... hrm!\n", inode); | |
1860 | ||
1861 | if (dirtied) { | |
fca65b4a | 1862 | inode_dirty_flags = __ceph_mark_dirty_caps(ci, dirtied); |
355da1eb SW |
1863 | inode->i_ctime = CURRENT_TIME; |
1864 | } | |
1865 | ||
1866 | release &= issued; | |
be655596 | 1867 | spin_unlock(&ci->i_ceph_lock); |
355da1eb | 1868 | |
fca65b4a SW |
1869 | if (inode_dirty_flags) |
1870 | __mark_inode_dirty(inode, inode_dirty_flags); | |
1871 | ||
7221fe4c | 1872 | if (ia_valid & ATTR_MODE) { |
4db658ea | 1873 | err = posix_acl_chmod(inode, attr->ia_mode); |
7221fe4c GZ |
1874 | if (err) |
1875 | goto out_put; | |
1876 | } | |
1877 | ||
355da1eb | 1878 | if (mask) { |
70b666c3 SW |
1879 | req->r_inode = inode; |
1880 | ihold(inode); | |
355da1eb SW |
1881 | req->r_inode_drop = release; |
1882 | req->r_args.setattr.mask = cpu_to_le32(mask); | |
1883 | req->r_num_caps = 1; | |
752c8bdc | 1884 | err = ceph_mdsc_do_request(mdsc, NULL, req); |
355da1eb SW |
1885 | } |
1886 | dout("setattr %p result=%d (%s locally, %d remote)\n", inode, err, | |
1887 | ceph_cap_string(dirtied), mask); | |
1888 | ||
1889 | ceph_mdsc_put_request(req); | |
b0d7c223 YZ |
1890 | if (mask & CEPH_SETATTR_SIZE) |
1891 | __ceph_do_pending_vmtruncate(inode); | |
355da1eb SW |
1892 | return err; |
1893 | out: | |
be655596 | 1894 | spin_unlock(&ci->i_ceph_lock); |
7221fe4c | 1895 | out_put: |
355da1eb SW |
1896 | ceph_mdsc_put_request(req); |
1897 | return err; | |
1898 | } | |
1899 | ||
1900 | /* | |
1901 | * Verify that we have a lease on the given mask. If not, | |
1902 | * do a getattr against an mds. | |
1903 | */ | |
1904 | int ceph_do_getattr(struct inode *inode, int mask) | |
1905 | { | |
3d14c5d2 YS |
1906 | struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb); |
1907 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
355da1eb SW |
1908 | struct ceph_mds_request *req; |
1909 | int err; | |
1910 | ||
1911 | if (ceph_snap(inode) == CEPH_SNAPDIR) { | |
1912 | dout("do_getattr inode %p SNAPDIR\n", inode); | |
1913 | return 0; | |
1914 | } | |
1915 | ||
b7495fc2 | 1916 | dout("do_getattr inode %p mask %s mode 0%o\n", inode, ceph_cap_string(mask), inode->i_mode); |
355da1eb SW |
1917 | if (ceph_caps_issued_mask(ceph_inode(inode), mask, 1)) |
1918 | return 0; | |
1919 | ||
1920 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS); | |
1921 | if (IS_ERR(req)) | |
1922 | return PTR_ERR(req); | |
70b666c3 SW |
1923 | req->r_inode = inode; |
1924 | ihold(inode); | |
355da1eb SW |
1925 | req->r_num_caps = 1; |
1926 | req->r_args.getattr.mask = cpu_to_le32(mask); | |
1927 | err = ceph_mdsc_do_request(mdsc, NULL, req); | |
1928 | ceph_mdsc_put_request(req); | |
1929 | dout("do_getattr result=%d\n", err); | |
1930 | return err; | |
1931 | } | |
1932 | ||
1933 | ||
1934 | /* | |
1935 | * Check inode permissions. We verify we have a valid value for | |
1936 | * the AUTH cap, then call the generic handler. | |
1937 | */ | |
10556cb2 | 1938 | int ceph_permission(struct inode *inode, int mask) |
355da1eb | 1939 | { |
b74c79e9 NP |
1940 | int err; |
1941 | ||
10556cb2 | 1942 | if (mask & MAY_NOT_BLOCK) |
b74c79e9 NP |
1943 | return -ECHILD; |
1944 | ||
1945 | err = ceph_do_getattr(inode, CEPH_CAP_AUTH_SHARED); | |
355da1eb SW |
1946 | |
1947 | if (!err) | |
2830ba7f | 1948 | err = generic_permission(inode, mask); |
355da1eb SW |
1949 | return err; |
1950 | } | |
1951 | ||
1952 | /* | |
1953 | * Get all attributes. Hopefully somedata we'll have a statlite() | |
1954 | * and can limit the fields we require to be accurate. | |
1955 | */ | |
1956 | int ceph_getattr(struct vfsmount *mnt, struct dentry *dentry, | |
1957 | struct kstat *stat) | |
1958 | { | |
1959 | struct inode *inode = dentry->d_inode; | |
232d4b01 | 1960 | struct ceph_inode_info *ci = ceph_inode(inode); |
355da1eb SW |
1961 | int err; |
1962 | ||
1963 | err = ceph_do_getattr(inode, CEPH_STAT_CAP_INODE_ALL); | |
1964 | if (!err) { | |
1965 | generic_fillattr(inode, stat); | |
ad1fee96 | 1966 | stat->ino = ceph_translate_ino(inode->i_sb, inode->i_ino); |
355da1eb SW |
1967 | if (ceph_snap(inode) != CEPH_NOSNAP) |
1968 | stat->dev = ceph_snap(inode); | |
1969 | else | |
1970 | stat->dev = 0; | |
232d4b01 | 1971 | if (S_ISDIR(inode->i_mode)) { |
1c1266bb YS |
1972 | if (ceph_test_mount_opt(ceph_sb_to_client(inode->i_sb), |
1973 | RBYTES)) | |
1974 | stat->size = ci->i_rbytes; | |
1975 | else | |
1976 | stat->size = ci->i_files + ci->i_subdirs; | |
232d4b01 | 1977 | stat->blocks = 0; |
355da1eb | 1978 | stat->blksize = 65536; |
232d4b01 | 1979 | } |
355da1eb SW |
1980 | } |
1981 | return err; | |
1982 | } |