Commit | Line | Data |
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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> | |
12 | ||
13 | #include "super.h" | |
3d14c5d2 YS |
14 | #include "mds_client.h" |
15 | #include <linux/ceph/decode.h> | |
355da1eb SW |
16 | |
17 | /* | |
18 | * Ceph inode operations | |
19 | * | |
20 | * Implement basic inode helpers (get, alloc) and inode ops (getattr, | |
21 | * setattr, etc.), xattr helpers, and helpers for assimilating | |
22 | * metadata returned by the MDS into our cache. | |
23 | * | |
24 | * Also define helpers for doing asynchronous writeback, invalidation, | |
25 | * and truncation for the benefit of those who can't afford to block | |
26 | * (typically because they are in the message handler path). | |
27 | */ | |
28 | ||
29 | static const struct inode_operations ceph_symlink_iops; | |
30 | ||
3c6f6b79 SW |
31 | static void ceph_invalidate_work(struct work_struct *work); |
32 | static void ceph_writeback_work(struct work_struct *work); | |
33 | static void ceph_vmtruncate_work(struct work_struct *work); | |
355da1eb SW |
34 | |
35 | /* | |
36 | * find or create an inode, given the ceph ino number | |
37 | */ | |
ad1fee96 YS |
38 | static int ceph_set_ino_cb(struct inode *inode, void *data) |
39 | { | |
40 | ceph_inode(inode)->i_vino = *(struct ceph_vino *)data; | |
41 | inode->i_ino = ceph_vino_to_ino(*(struct ceph_vino *)data); | |
42 | return 0; | |
43 | } | |
44 | ||
355da1eb SW |
45 | struct inode *ceph_get_inode(struct super_block *sb, struct ceph_vino vino) |
46 | { | |
47 | struct inode *inode; | |
48 | ino_t t = ceph_vino_to_ino(vino); | |
49 | ||
50 | inode = iget5_locked(sb, t, ceph_ino_compare, ceph_set_ino_cb, &vino); | |
51 | if (inode == NULL) | |
52 | return ERR_PTR(-ENOMEM); | |
53 | if (inode->i_state & I_NEW) { | |
54 | dout("get_inode created new inode %p %llx.%llx ino %llx\n", | |
55 | inode, ceph_vinop(inode), (u64)inode->i_ino); | |
56 | unlock_new_inode(inode); | |
57 | } | |
58 | ||
59 | dout("get_inode on %lu=%llx.%llx got %p\n", inode->i_ino, vino.ino, | |
60 | vino.snap, inode); | |
61 | return inode; | |
62 | } | |
63 | ||
6f60f889 YZ |
64 | struct inode *ceph_lookup_inode(struct super_block *sb, struct ceph_vino vino) |
65 | { | |
66 | struct inode *inode; | |
67 | ino_t t = ceph_vino_to_ino(vino); | |
68 | inode = ilookup5_nowait(sb, t, ceph_ino_compare, &vino); | |
69 | return inode; | |
70 | } | |
71 | ||
355da1eb SW |
72 | /* |
73 | * get/constuct snapdir inode for a given directory | |
74 | */ | |
75 | struct inode *ceph_get_snapdir(struct inode *parent) | |
76 | { | |
77 | struct ceph_vino vino = { | |
78 | .ino = ceph_ino(parent), | |
79 | .snap = CEPH_SNAPDIR, | |
80 | }; | |
81 | struct inode *inode = ceph_get_inode(parent->i_sb, vino); | |
b377ff13 | 82 | struct ceph_inode_info *ci = ceph_inode(inode); |
355da1eb SW |
83 | |
84 | BUG_ON(!S_ISDIR(parent->i_mode)); | |
85 | if (IS_ERR(inode)) | |
7e34bc52 | 86 | return inode; |
355da1eb SW |
87 | inode->i_mode = parent->i_mode; |
88 | inode->i_uid = parent->i_uid; | |
89 | inode->i_gid = parent->i_gid; | |
90 | inode->i_op = &ceph_dir_iops; | |
91 | inode->i_fop = &ceph_dir_fops; | |
b377ff13 SW |
92 | ci->i_snap_caps = CEPH_CAP_PIN; /* so we can open */ |
93 | ci->i_rbytes = 0; | |
355da1eb SW |
94 | return inode; |
95 | } | |
96 | ||
97 | const struct inode_operations ceph_file_iops = { | |
98 | .permission = ceph_permission, | |
99 | .setattr = ceph_setattr, | |
100 | .getattr = ceph_getattr, | |
101 | .setxattr = ceph_setxattr, | |
102 | .getxattr = ceph_getxattr, | |
103 | .listxattr = ceph_listxattr, | |
104 | .removexattr = ceph_removexattr, | |
105 | }; | |
106 | ||
107 | ||
108 | /* | |
109 | * We use a 'frag tree' to keep track of the MDS's directory fragments | |
110 | * for a given inode (usually there is just a single fragment). We | |
111 | * need to know when a child frag is delegated to a new MDS, or when | |
112 | * it is flagged as replicated, so we can direct our requests | |
113 | * accordingly. | |
114 | */ | |
115 | ||
116 | /* | |
117 | * find/create a frag in the tree | |
118 | */ | |
119 | static struct ceph_inode_frag *__get_or_create_frag(struct ceph_inode_info *ci, | |
120 | u32 f) | |
121 | { | |
122 | struct rb_node **p; | |
123 | struct rb_node *parent = NULL; | |
124 | struct ceph_inode_frag *frag; | |
125 | int c; | |
126 | ||
127 | p = &ci->i_fragtree.rb_node; | |
128 | while (*p) { | |
129 | parent = *p; | |
130 | frag = rb_entry(parent, struct ceph_inode_frag, node); | |
131 | c = ceph_frag_compare(f, frag->frag); | |
132 | if (c < 0) | |
133 | p = &(*p)->rb_left; | |
134 | else if (c > 0) | |
135 | p = &(*p)->rb_right; | |
136 | else | |
137 | return frag; | |
138 | } | |
139 | ||
140 | frag = kmalloc(sizeof(*frag), GFP_NOFS); | |
141 | if (!frag) { | |
142 | pr_err("__get_or_create_frag ENOMEM on %p %llx.%llx " | |
143 | "frag %x\n", &ci->vfs_inode, | |
144 | ceph_vinop(&ci->vfs_inode), f); | |
145 | return ERR_PTR(-ENOMEM); | |
146 | } | |
147 | frag->frag = f; | |
148 | frag->split_by = 0; | |
149 | frag->mds = -1; | |
150 | frag->ndist = 0; | |
151 | ||
152 | rb_link_node(&frag->node, parent, p); | |
153 | rb_insert_color(&frag->node, &ci->i_fragtree); | |
154 | ||
155 | dout("get_or_create_frag added %llx.%llx frag %x\n", | |
156 | ceph_vinop(&ci->vfs_inode), f); | |
157 | return frag; | |
158 | } | |
159 | ||
160 | /* | |
161 | * find a specific frag @f | |
162 | */ | |
163 | struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci, u32 f) | |
164 | { | |
165 | struct rb_node *n = ci->i_fragtree.rb_node; | |
166 | ||
167 | while (n) { | |
168 | struct ceph_inode_frag *frag = | |
169 | rb_entry(n, struct ceph_inode_frag, node); | |
170 | int c = ceph_frag_compare(f, frag->frag); | |
171 | if (c < 0) | |
172 | n = n->rb_left; | |
173 | else if (c > 0) | |
174 | n = n->rb_right; | |
175 | else | |
176 | return frag; | |
177 | } | |
178 | return NULL; | |
179 | } | |
180 | ||
181 | /* | |
182 | * Choose frag containing the given value @v. If @pfrag is | |
183 | * specified, copy the frag delegation info to the caller if | |
184 | * it is present. | |
185 | */ | |
186 | u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v, | |
187 | struct ceph_inode_frag *pfrag, | |
188 | int *found) | |
189 | { | |
190 | u32 t = ceph_frag_make(0, 0); | |
191 | struct ceph_inode_frag *frag; | |
192 | unsigned nway, i; | |
193 | u32 n; | |
194 | ||
195 | if (found) | |
196 | *found = 0; | |
197 | ||
198 | mutex_lock(&ci->i_fragtree_mutex); | |
199 | while (1) { | |
200 | WARN_ON(!ceph_frag_contains_value(t, v)); | |
201 | frag = __ceph_find_frag(ci, t); | |
202 | if (!frag) | |
203 | break; /* t is a leaf */ | |
204 | if (frag->split_by == 0) { | |
205 | if (pfrag) | |
206 | memcpy(pfrag, frag, sizeof(*pfrag)); | |
207 | if (found) | |
208 | *found = 1; | |
209 | break; | |
210 | } | |
211 | ||
212 | /* choose child */ | |
213 | nway = 1 << frag->split_by; | |
214 | dout("choose_frag(%x) %x splits by %d (%d ways)\n", v, t, | |
215 | frag->split_by, nway); | |
216 | for (i = 0; i < nway; i++) { | |
217 | n = ceph_frag_make_child(t, frag->split_by, i); | |
218 | if (ceph_frag_contains_value(n, v)) { | |
219 | t = n; | |
220 | break; | |
221 | } | |
222 | } | |
223 | BUG_ON(i == nway); | |
224 | } | |
225 | dout("choose_frag(%x) = %x\n", v, t); | |
226 | ||
227 | mutex_unlock(&ci->i_fragtree_mutex); | |
228 | return t; | |
229 | } | |
230 | ||
231 | /* | |
232 | * Process dirfrag (delegation) info from the mds. Include leaf | |
233 | * fragment in tree ONLY if ndist > 0. Otherwise, only | |
234 | * branches/splits are included in i_fragtree) | |
235 | */ | |
236 | static int ceph_fill_dirfrag(struct inode *inode, | |
237 | struct ceph_mds_reply_dirfrag *dirinfo) | |
238 | { | |
239 | struct ceph_inode_info *ci = ceph_inode(inode); | |
240 | struct ceph_inode_frag *frag; | |
241 | u32 id = le32_to_cpu(dirinfo->frag); | |
242 | int mds = le32_to_cpu(dirinfo->auth); | |
243 | int ndist = le32_to_cpu(dirinfo->ndist); | |
244 | int i; | |
245 | int err = 0; | |
246 | ||
247 | mutex_lock(&ci->i_fragtree_mutex); | |
248 | if (ndist == 0) { | |
249 | /* no delegation info needed. */ | |
250 | frag = __ceph_find_frag(ci, id); | |
251 | if (!frag) | |
252 | goto out; | |
253 | if (frag->split_by == 0) { | |
254 | /* tree leaf, remove */ | |
255 | dout("fill_dirfrag removed %llx.%llx frag %x" | |
256 | " (no ref)\n", ceph_vinop(inode), id); | |
257 | rb_erase(&frag->node, &ci->i_fragtree); | |
258 | kfree(frag); | |
259 | } else { | |
260 | /* tree branch, keep and clear */ | |
261 | dout("fill_dirfrag cleared %llx.%llx frag %x" | |
262 | " referral\n", ceph_vinop(inode), id); | |
263 | frag->mds = -1; | |
264 | frag->ndist = 0; | |
265 | } | |
266 | goto out; | |
267 | } | |
268 | ||
269 | ||
270 | /* find/add this frag to store mds delegation info */ | |
271 | frag = __get_or_create_frag(ci, id); | |
272 | if (IS_ERR(frag)) { | |
273 | /* this is not the end of the world; we can continue | |
274 | with bad/inaccurate delegation info */ | |
275 | pr_err("fill_dirfrag ENOMEM on mds ref %llx.%llx fg %x\n", | |
276 | ceph_vinop(inode), le32_to_cpu(dirinfo->frag)); | |
277 | err = -ENOMEM; | |
278 | goto out; | |
279 | } | |
280 | ||
281 | frag->mds = mds; | |
282 | frag->ndist = min_t(u32, ndist, CEPH_MAX_DIRFRAG_REP); | |
283 | for (i = 0; i < frag->ndist; i++) | |
284 | frag->dist[i] = le32_to_cpu(dirinfo->dist[i]); | |
285 | dout("fill_dirfrag %llx.%llx frag %x ndist=%d\n", | |
286 | ceph_vinop(inode), frag->frag, frag->ndist); | |
287 | ||
288 | out: | |
289 | mutex_unlock(&ci->i_fragtree_mutex); | |
290 | return err; | |
291 | } | |
292 | ||
293 | ||
294 | /* | |
295 | * initialize a newly allocated inode. | |
296 | */ | |
297 | struct inode *ceph_alloc_inode(struct super_block *sb) | |
298 | { | |
299 | struct ceph_inode_info *ci; | |
300 | int i; | |
301 | ||
302 | ci = kmem_cache_alloc(ceph_inode_cachep, GFP_NOFS); | |
303 | if (!ci) | |
304 | return NULL; | |
305 | ||
306 | dout("alloc_inode %p\n", &ci->vfs_inode); | |
307 | ||
be655596 SW |
308 | spin_lock_init(&ci->i_ceph_lock); |
309 | ||
355da1eb SW |
310 | ci->i_version = 0; |
311 | ci->i_time_warp_seq = 0; | |
312 | ci->i_ceph_flags = 0; | |
2f276c51 YZ |
313 | atomic_set(&ci->i_release_count, 1); |
314 | atomic_set(&ci->i_complete_count, 0); | |
355da1eb SW |
315 | ci->i_symlink = NULL; |
316 | ||
6c0f3af7 SW |
317 | memset(&ci->i_dir_layout, 0, sizeof(ci->i_dir_layout)); |
318 | ||
355da1eb SW |
319 | ci->i_fragtree = RB_ROOT; |
320 | mutex_init(&ci->i_fragtree_mutex); | |
321 | ||
322 | ci->i_xattrs.blob = NULL; | |
323 | ci->i_xattrs.prealloc_blob = NULL; | |
324 | ci->i_xattrs.dirty = false; | |
325 | ci->i_xattrs.index = RB_ROOT; | |
326 | ci->i_xattrs.count = 0; | |
327 | ci->i_xattrs.names_size = 0; | |
328 | ci->i_xattrs.vals_size = 0; | |
329 | ci->i_xattrs.version = 0; | |
330 | ci->i_xattrs.index_version = 0; | |
331 | ||
332 | ci->i_caps = RB_ROOT; | |
333 | ci->i_auth_cap = NULL; | |
334 | ci->i_dirty_caps = 0; | |
335 | ci->i_flushing_caps = 0; | |
336 | INIT_LIST_HEAD(&ci->i_dirty_item); | |
337 | INIT_LIST_HEAD(&ci->i_flushing_item); | |
338 | ci->i_cap_flush_seq = 0; | |
339 | ci->i_cap_flush_last_tid = 0; | |
340 | memset(&ci->i_cap_flush_tid, 0, sizeof(ci->i_cap_flush_tid)); | |
341 | init_waitqueue_head(&ci->i_cap_wq); | |
342 | ci->i_hold_caps_min = 0; | |
343 | ci->i_hold_caps_max = 0; | |
344 | INIT_LIST_HEAD(&ci->i_cap_delay_list); | |
345 | ci->i_cap_exporting_mds = 0; | |
346 | ci->i_cap_exporting_mseq = 0; | |
347 | ci->i_cap_exporting_issued = 0; | |
348 | INIT_LIST_HEAD(&ci->i_cap_snaps); | |
349 | ci->i_head_snapc = NULL; | |
350 | ci->i_snap_caps = 0; | |
351 | ||
352 | for (i = 0; i < CEPH_FILE_MODE_NUM; i++) | |
353 | ci->i_nr_by_mode[i] = 0; | |
354 | ||
355 | ci->i_truncate_seq = 0; | |
356 | ci->i_truncate_size = 0; | |
357 | ci->i_truncate_pending = 0; | |
358 | ||
359 | ci->i_max_size = 0; | |
360 | ci->i_reported_size = 0; | |
361 | ci->i_wanted_max_size = 0; | |
362 | ci->i_requested_max_size = 0; | |
363 | ||
364 | ci->i_pin_ref = 0; | |
365 | ci->i_rd_ref = 0; | |
366 | ci->i_rdcache_ref = 0; | |
367 | ci->i_wr_ref = 0; | |
d3d0720d | 368 | ci->i_wb_ref = 0; |
355da1eb SW |
369 | ci->i_wrbuffer_ref = 0; |
370 | ci->i_wrbuffer_ref_head = 0; | |
371 | ci->i_shared_gen = 0; | |
372 | ci->i_rdcache_gen = 0; | |
373 | ci->i_rdcache_revoking = 0; | |
374 | ||
375 | INIT_LIST_HEAD(&ci->i_unsafe_writes); | |
376 | INIT_LIST_HEAD(&ci->i_unsafe_dirops); | |
377 | spin_lock_init(&ci->i_unsafe_lock); | |
378 | ||
379 | ci->i_snap_realm = NULL; | |
380 | INIT_LIST_HEAD(&ci->i_snap_realm_item); | |
381 | INIT_LIST_HEAD(&ci->i_snap_flush_item); | |
382 | ||
3c6f6b79 SW |
383 | INIT_WORK(&ci->i_wb_work, ceph_writeback_work); |
384 | INIT_WORK(&ci->i_pg_inv_work, ceph_invalidate_work); | |
355da1eb SW |
385 | |
386 | INIT_WORK(&ci->i_vmtruncate_work, ceph_vmtruncate_work); | |
387 | ||
388 | return &ci->vfs_inode; | |
389 | } | |
390 | ||
fa0d7e3d NP |
391 | static void ceph_i_callback(struct rcu_head *head) |
392 | { | |
393 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
394 | struct ceph_inode_info *ci = ceph_inode(inode); | |
395 | ||
fa0d7e3d NP |
396 | kmem_cache_free(ceph_inode_cachep, ci); |
397 | } | |
398 | ||
355da1eb SW |
399 | void ceph_destroy_inode(struct inode *inode) |
400 | { | |
401 | struct ceph_inode_info *ci = ceph_inode(inode); | |
402 | struct ceph_inode_frag *frag; | |
403 | struct rb_node *n; | |
404 | ||
405 | dout("destroy_inode %p ino %llx.%llx\n", inode, ceph_vinop(inode)); | |
406 | ||
407 | ceph_queue_caps_release(inode); | |
408 | ||
8b218b8a SW |
409 | /* |
410 | * we may still have a snap_realm reference if there are stray | |
411 | * caps in i_cap_exporting_issued or i_snap_caps. | |
412 | */ | |
413 | if (ci->i_snap_realm) { | |
414 | struct ceph_mds_client *mdsc = | |
3d14c5d2 | 415 | ceph_sb_to_client(ci->vfs_inode.i_sb)->mdsc; |
8b218b8a SW |
416 | struct ceph_snap_realm *realm = ci->i_snap_realm; |
417 | ||
418 | dout(" dropping residual ref to snap realm %p\n", realm); | |
419 | spin_lock(&realm->inodes_with_caps_lock); | |
420 | list_del_init(&ci->i_snap_realm_item); | |
421 | spin_unlock(&realm->inodes_with_caps_lock); | |
422 | ceph_put_snap_realm(mdsc, realm); | |
423 | } | |
424 | ||
355da1eb SW |
425 | kfree(ci->i_symlink); |
426 | while ((n = rb_first(&ci->i_fragtree)) != NULL) { | |
427 | frag = rb_entry(n, struct ceph_inode_frag, node); | |
428 | rb_erase(n, &ci->i_fragtree); | |
429 | kfree(frag); | |
430 | } | |
431 | ||
432 | __ceph_destroy_xattrs(ci); | |
b6c1d5b8 SW |
433 | if (ci->i_xattrs.blob) |
434 | ceph_buffer_put(ci->i_xattrs.blob); | |
435 | if (ci->i_xattrs.prealloc_blob) | |
436 | ceph_buffer_put(ci->i_xattrs.prealloc_blob); | |
355da1eb | 437 | |
fa0d7e3d | 438 | call_rcu(&inode->i_rcu, ceph_i_callback); |
355da1eb SW |
439 | } |
440 | ||
441 | ||
442 | /* | |
443 | * Helpers to fill in size, ctime, mtime, and atime. We have to be | |
444 | * careful because either the client or MDS may have more up to date | |
445 | * info, depending on which capabilities are held, and whether | |
446 | * time_warp_seq or truncate_seq have increased. (Ordinarily, mtime | |
447 | * and size are monotonically increasing, except when utimes() or | |
448 | * truncate() increments the corresponding _seq values.) | |
449 | */ | |
450 | int ceph_fill_file_size(struct inode *inode, int issued, | |
451 | u32 truncate_seq, u64 truncate_size, u64 size) | |
452 | { | |
453 | struct ceph_inode_info *ci = ceph_inode(inode); | |
454 | int queue_trunc = 0; | |
455 | ||
456 | if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) > 0 || | |
457 | (truncate_seq == ci->i_truncate_seq && size > inode->i_size)) { | |
458 | dout("size %lld -> %llu\n", inode->i_size, size); | |
459 | inode->i_size = size; | |
460 | inode->i_blocks = (size + (1<<9) - 1) >> 9; | |
461 | ci->i_reported_size = size; | |
462 | if (truncate_seq != ci->i_truncate_seq) { | |
463 | dout("truncate_seq %u -> %u\n", | |
464 | ci->i_truncate_seq, truncate_seq); | |
465 | ci->i_truncate_seq = truncate_seq; | |
3d497d85 YS |
466 | /* |
467 | * If we hold relevant caps, or in the case where we're | |
468 | * not the only client referencing this file and we | |
469 | * don't hold those caps, then we need to check whether | |
470 | * the file is either opened or mmaped | |
471 | */ | |
472 | if ((issued & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_RD| | |
2962507c SW |
473 | CEPH_CAP_FILE_WR|CEPH_CAP_FILE_BUFFER| |
474 | CEPH_CAP_FILE_EXCL| | |
475 | CEPH_CAP_FILE_LAZYIO)) || | |
3d497d85 YS |
476 | mapping_mapped(inode->i_mapping) || |
477 | __ceph_caps_file_wanted(ci)) { | |
355da1eb SW |
478 | ci->i_truncate_pending++; |
479 | queue_trunc = 1; | |
480 | } | |
481 | } | |
482 | } | |
483 | if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) >= 0 && | |
484 | ci->i_truncate_size != truncate_size) { | |
485 | dout("truncate_size %lld -> %llu\n", ci->i_truncate_size, | |
486 | truncate_size); | |
487 | ci->i_truncate_size = truncate_size; | |
488 | } | |
489 | return queue_trunc; | |
490 | } | |
491 | ||
492 | void ceph_fill_file_time(struct inode *inode, int issued, | |
493 | u64 time_warp_seq, struct timespec *ctime, | |
494 | struct timespec *mtime, struct timespec *atime) | |
495 | { | |
496 | struct ceph_inode_info *ci = ceph_inode(inode); | |
497 | int warn = 0; | |
498 | ||
499 | if (issued & (CEPH_CAP_FILE_EXCL| | |
500 | CEPH_CAP_FILE_WR| | |
d8672d64 SW |
501 | CEPH_CAP_FILE_BUFFER| |
502 | CEPH_CAP_AUTH_EXCL| | |
503 | CEPH_CAP_XATTR_EXCL)) { | |
355da1eb SW |
504 | if (timespec_compare(ctime, &inode->i_ctime) > 0) { |
505 | dout("ctime %ld.%09ld -> %ld.%09ld inc w/ cap\n", | |
506 | inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec, | |
507 | ctime->tv_sec, ctime->tv_nsec); | |
508 | inode->i_ctime = *ctime; | |
509 | } | |
510 | if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) > 0) { | |
511 | /* the MDS did a utimes() */ | |
512 | dout("mtime %ld.%09ld -> %ld.%09ld " | |
513 | "tw %d -> %d\n", | |
514 | inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec, | |
515 | mtime->tv_sec, mtime->tv_nsec, | |
516 | ci->i_time_warp_seq, (int)time_warp_seq); | |
517 | ||
518 | inode->i_mtime = *mtime; | |
519 | inode->i_atime = *atime; | |
520 | ci->i_time_warp_seq = time_warp_seq; | |
521 | } else if (time_warp_seq == ci->i_time_warp_seq) { | |
522 | /* nobody did utimes(); take the max */ | |
523 | if (timespec_compare(mtime, &inode->i_mtime) > 0) { | |
524 | dout("mtime %ld.%09ld -> %ld.%09ld inc\n", | |
525 | inode->i_mtime.tv_sec, | |
526 | inode->i_mtime.tv_nsec, | |
527 | mtime->tv_sec, mtime->tv_nsec); | |
528 | inode->i_mtime = *mtime; | |
529 | } | |
530 | if (timespec_compare(atime, &inode->i_atime) > 0) { | |
531 | dout("atime %ld.%09ld -> %ld.%09ld inc\n", | |
532 | inode->i_atime.tv_sec, | |
533 | inode->i_atime.tv_nsec, | |
534 | atime->tv_sec, atime->tv_nsec); | |
535 | inode->i_atime = *atime; | |
536 | } | |
537 | } else if (issued & CEPH_CAP_FILE_EXCL) { | |
538 | /* we did a utimes(); ignore mds values */ | |
539 | } else { | |
540 | warn = 1; | |
541 | } | |
542 | } else { | |
d8672d64 | 543 | /* we have no write|excl caps; whatever the MDS says is true */ |
355da1eb SW |
544 | if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) >= 0) { |
545 | inode->i_ctime = *ctime; | |
546 | inode->i_mtime = *mtime; | |
547 | inode->i_atime = *atime; | |
548 | ci->i_time_warp_seq = time_warp_seq; | |
549 | } else { | |
550 | warn = 1; | |
551 | } | |
552 | } | |
553 | if (warn) /* time_warp_seq shouldn't go backwards */ | |
554 | dout("%p mds time_warp_seq %llu < %u\n", | |
555 | inode, time_warp_seq, ci->i_time_warp_seq); | |
556 | } | |
557 | ||
558 | /* | |
559 | * Populate an inode based on info from mds. May be called on new or | |
560 | * existing inodes. | |
561 | */ | |
562 | static int fill_inode(struct inode *inode, | |
563 | struct ceph_mds_reply_info_in *iinfo, | |
564 | struct ceph_mds_reply_dirfrag *dirinfo, | |
565 | struct ceph_mds_session *session, | |
566 | unsigned long ttl_from, int cap_fmode, | |
567 | struct ceph_cap_reservation *caps_reservation) | |
568 | { | |
569 | struct ceph_mds_reply_inode *info = iinfo->in; | |
570 | struct ceph_inode_info *ci = ceph_inode(inode); | |
571 | int i; | |
dfabbed6 | 572 | int issued = 0, implemented; |
355da1eb SW |
573 | struct timespec mtime, atime, ctime; |
574 | u32 nsplits; | |
575 | struct ceph_buffer *xattr_blob = NULL; | |
576 | int err = 0; | |
577 | int queue_trunc = 0; | |
578 | ||
579 | dout("fill_inode %p ino %llx.%llx v %llu had %llu\n", | |
580 | inode, ceph_vinop(inode), le64_to_cpu(info->version), | |
581 | ci->i_version); | |
582 | ||
583 | /* | |
584 | * prealloc xattr data, if it looks like we'll need it. only | |
585 | * if len > 4 (meaning there are actually xattrs; the first 4 | |
586 | * bytes are the xattr count). | |
587 | */ | |
588 | if (iinfo->xattr_len > 4) { | |
b6c1d5b8 | 589 | xattr_blob = ceph_buffer_new(iinfo->xattr_len, GFP_NOFS); |
355da1eb SW |
590 | if (!xattr_blob) |
591 | pr_err("fill_inode ENOMEM xattr blob %d bytes\n", | |
592 | iinfo->xattr_len); | |
593 | } | |
594 | ||
be655596 | 595 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
596 | |
597 | /* | |
598 | * provided version will be odd if inode value is projected, | |
8bd59e01 SW |
599 | * even if stable. skip the update if we have newer stable |
600 | * info (ours>=theirs, e.g. due to racing mds replies), unless | |
601 | * we are getting projected (unstable) info (in which case the | |
602 | * version is odd, and we want ours>theirs). | |
603 | * us them | |
604 | * 2 2 skip | |
605 | * 3 2 skip | |
606 | * 3 3 update | |
355da1eb SW |
607 | */ |
608 | if (le64_to_cpu(info->version) > 0 && | |
8bd59e01 | 609 | (ci->i_version & ~1) >= le64_to_cpu(info->version)) |
355da1eb | 610 | goto no_change; |
dfabbed6 | 611 | |
355da1eb SW |
612 | issued = __ceph_caps_issued(ci, &implemented); |
613 | issued |= implemented | __ceph_caps_dirty(ci); | |
614 | ||
615 | /* update inode */ | |
616 | ci->i_version = le64_to_cpu(info->version); | |
617 | inode->i_version++; | |
618 | inode->i_rdev = le32_to_cpu(info->rdev); | |
619 | ||
620 | if ((issued & CEPH_CAP_AUTH_EXCL) == 0) { | |
621 | inode->i_mode = le32_to_cpu(info->mode); | |
ab871b90 EB |
622 | inode->i_uid = make_kuid(&init_user_ns, le32_to_cpu(info->uid)); |
623 | inode->i_gid = make_kgid(&init_user_ns, le32_to_cpu(info->gid)); | |
355da1eb | 624 | dout("%p mode 0%o uid.gid %d.%d\n", inode, inode->i_mode, |
bd2bae6a EB |
625 | from_kuid(&init_user_ns, inode->i_uid), |
626 | from_kgid(&init_user_ns, inode->i_gid)); | |
355da1eb SW |
627 | } |
628 | ||
629 | if ((issued & CEPH_CAP_LINK_EXCL) == 0) | |
bfe86848 | 630 | set_nlink(inode, le32_to_cpu(info->nlink)); |
355da1eb SW |
631 | |
632 | /* be careful with mtime, atime, size */ | |
633 | ceph_decode_timespec(&atime, &info->atime); | |
634 | ceph_decode_timespec(&mtime, &info->mtime); | |
635 | ceph_decode_timespec(&ctime, &info->ctime); | |
636 | queue_trunc = ceph_fill_file_size(inode, issued, | |
637 | le32_to_cpu(info->truncate_seq), | |
638 | le64_to_cpu(info->truncate_size), | |
355da1eb SW |
639 | le64_to_cpu(info->size)); |
640 | ceph_fill_file_time(inode, issued, | |
641 | le32_to_cpu(info->time_warp_seq), | |
642 | &ctime, &mtime, &atime); | |
643 | ||
912a9b03 SW |
644 | /* only update max_size on auth cap */ |
645 | if ((info->cap.flags & CEPH_CAP_FLAG_AUTH) && | |
646 | ci->i_max_size != le64_to_cpu(info->max_size)) { | |
647 | dout("max_size %lld -> %llu\n", ci->i_max_size, | |
648 | le64_to_cpu(info->max_size)); | |
649 | ci->i_max_size = le64_to_cpu(info->max_size); | |
650 | } | |
651 | ||
355da1eb SW |
652 | ci->i_layout = info->layout; |
653 | inode->i_blkbits = fls(le32_to_cpu(info->layout.fl_stripe_unit)) - 1; | |
654 | ||
655 | /* xattrs */ | |
656 | /* note that if i_xattrs.len <= 4, i_xattrs.data will still be NULL. */ | |
657 | if ((issued & CEPH_CAP_XATTR_EXCL) == 0 && | |
658 | le64_to_cpu(info->xattr_version) > ci->i_xattrs.version) { | |
659 | if (ci->i_xattrs.blob) | |
660 | ceph_buffer_put(ci->i_xattrs.blob); | |
661 | ci->i_xattrs.blob = xattr_blob; | |
662 | if (xattr_blob) | |
663 | memcpy(ci->i_xattrs.blob->vec.iov_base, | |
664 | iinfo->xattr_data, iinfo->xattr_len); | |
665 | ci->i_xattrs.version = le64_to_cpu(info->xattr_version); | |
a6424e48 | 666 | xattr_blob = NULL; |
355da1eb SW |
667 | } |
668 | ||
669 | inode->i_mapping->a_ops = &ceph_aops; | |
670 | inode->i_mapping->backing_dev_info = | |
640ef79d | 671 | &ceph_sb_to_client(inode->i_sb)->backing_dev_info; |
355da1eb SW |
672 | |
673 | switch (inode->i_mode & S_IFMT) { | |
674 | case S_IFIFO: | |
675 | case S_IFBLK: | |
676 | case S_IFCHR: | |
677 | case S_IFSOCK: | |
678 | init_special_inode(inode, inode->i_mode, inode->i_rdev); | |
679 | inode->i_op = &ceph_file_iops; | |
680 | break; | |
681 | case S_IFREG: | |
682 | inode->i_op = &ceph_file_iops; | |
683 | inode->i_fop = &ceph_file_fops; | |
684 | break; | |
685 | case S_IFLNK: | |
686 | inode->i_op = &ceph_symlink_iops; | |
687 | if (!ci->i_symlink) { | |
810339ec | 688 | u32 symlen = iinfo->symlink_len; |
355da1eb SW |
689 | char *sym; |
690 | ||
be655596 | 691 | spin_unlock(&ci->i_ceph_lock); |
355da1eb | 692 | |
810339ec XW |
693 | err = -EINVAL; |
694 | if (WARN_ON(symlen != inode->i_size)) | |
695 | goto out; | |
696 | ||
355da1eb | 697 | err = -ENOMEM; |
810339ec | 698 | sym = kstrndup(iinfo->symlink, symlen, GFP_NOFS); |
355da1eb SW |
699 | if (!sym) |
700 | goto out; | |
355da1eb | 701 | |
be655596 | 702 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
703 | if (!ci->i_symlink) |
704 | ci->i_symlink = sym; | |
705 | else | |
706 | kfree(sym); /* lost a race */ | |
707 | } | |
708 | break; | |
709 | case S_IFDIR: | |
710 | inode->i_op = &ceph_dir_iops; | |
711 | inode->i_fop = &ceph_dir_fops; | |
712 | ||
14303d20 SW |
713 | ci->i_dir_layout = iinfo->dir_layout; |
714 | ||
355da1eb SW |
715 | ci->i_files = le64_to_cpu(info->files); |
716 | ci->i_subdirs = le64_to_cpu(info->subdirs); | |
717 | ci->i_rbytes = le64_to_cpu(info->rbytes); | |
718 | ci->i_rfiles = le64_to_cpu(info->rfiles); | |
719 | ci->i_rsubdirs = le64_to_cpu(info->rsubdirs); | |
720 | ceph_decode_timespec(&ci->i_rctime, &info->rctime); | |
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 | ||
a8673d61 YZ |
727 | /* set dir completion flag? */ |
728 | if (S_ISDIR(inode->i_mode) && | |
729 | ci->i_files == 0 && ci->i_subdirs == 0 && | |
730 | ceph_snap(inode) == CEPH_NOSNAP && | |
731 | (le32_to_cpu(info->cap.caps) & CEPH_CAP_FILE_SHARED) && | |
732 | (issued & CEPH_CAP_FILE_EXCL) == 0 && | |
2f276c51 | 733 | !__ceph_dir_is_complete(ci)) { |
a8673d61 | 734 | dout(" marking %p complete (empty)\n", inode); |
2f276c51 | 735 | __ceph_dir_set_complete(ci, atomic_read(&ci->i_release_count)); |
a8673d61 YZ |
736 | ci->i_max_offset = 2; |
737 | } | |
355da1eb | 738 | no_change: |
be655596 | 739 | spin_unlock(&ci->i_ceph_lock); |
355da1eb SW |
740 | |
741 | /* queue truncate if we saw i_size decrease */ | |
742 | if (queue_trunc) | |
3c6f6b79 | 743 | ceph_queue_vmtruncate(inode); |
355da1eb SW |
744 | |
745 | /* populate frag tree */ | |
746 | /* FIXME: move me up, if/when version reflects fragtree changes */ | |
747 | nsplits = le32_to_cpu(info->fragtree.nsplits); | |
748 | mutex_lock(&ci->i_fragtree_mutex); | |
749 | for (i = 0; i < nsplits; i++) { | |
750 | u32 id = le32_to_cpu(info->fragtree.splits[i].frag); | |
751 | struct ceph_inode_frag *frag = __get_or_create_frag(ci, id); | |
752 | ||
753 | if (IS_ERR(frag)) | |
754 | continue; | |
755 | frag->split_by = le32_to_cpu(info->fragtree.splits[i].by); | |
756 | dout(" frag %x split by %d\n", frag->frag, frag->split_by); | |
757 | } | |
758 | mutex_unlock(&ci->i_fragtree_mutex); | |
759 | ||
760 | /* were we issued a capability? */ | |
761 | if (info->cap.caps) { | |
762 | if (ceph_snap(inode) == CEPH_NOSNAP) { | |
763 | ceph_add_cap(inode, session, | |
764 | le64_to_cpu(info->cap.cap_id), | |
765 | cap_fmode, | |
766 | le32_to_cpu(info->cap.caps), | |
767 | le32_to_cpu(info->cap.wanted), | |
768 | le32_to_cpu(info->cap.seq), | |
769 | le32_to_cpu(info->cap.mseq), | |
770 | le64_to_cpu(info->cap.realm), | |
771 | info->cap.flags, | |
772 | caps_reservation); | |
773 | } else { | |
be655596 | 774 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
775 | dout(" %p got snap_caps %s\n", inode, |
776 | ceph_cap_string(le32_to_cpu(info->cap.caps))); | |
777 | ci->i_snap_caps |= le32_to_cpu(info->cap.caps); | |
778 | if (cap_fmode >= 0) | |
779 | __ceph_get_fmode(ci, cap_fmode); | |
be655596 | 780 | spin_unlock(&ci->i_ceph_lock); |
355da1eb | 781 | } |
04d000eb SW |
782 | } else if (cap_fmode >= 0) { |
783 | pr_warning("mds issued no caps on %llx.%llx\n", | |
784 | ceph_vinop(inode)); | |
785 | __ceph_get_fmode(ci, cap_fmode); | |
355da1eb SW |
786 | } |
787 | ||
788 | /* update delegation info? */ | |
789 | if (dirinfo) | |
790 | ceph_fill_dirfrag(inode, dirinfo); | |
791 | ||
792 | err = 0; | |
793 | ||
794 | out: | |
b6c1d5b8 SW |
795 | if (xattr_blob) |
796 | ceph_buffer_put(xattr_blob); | |
355da1eb SW |
797 | return err; |
798 | } | |
799 | ||
800 | /* | |
801 | * caller should hold session s_mutex. | |
802 | */ | |
803 | static void update_dentry_lease(struct dentry *dentry, | |
804 | struct ceph_mds_reply_lease *lease, | |
805 | struct ceph_mds_session *session, | |
806 | unsigned long from_time) | |
807 | { | |
808 | struct ceph_dentry_info *di = ceph_dentry(dentry); | |
809 | long unsigned duration = le32_to_cpu(lease->duration_ms); | |
810 | long unsigned ttl = from_time + (duration * HZ) / 1000; | |
811 | long unsigned half_ttl = from_time + (duration * HZ / 2) / 1000; | |
812 | struct inode *dir; | |
813 | ||
814 | /* only track leases on regular dentries */ | |
815 | if (dentry->d_op != &ceph_dentry_ops) | |
816 | return; | |
817 | ||
818 | spin_lock(&dentry->d_lock); | |
2f90b852 SW |
819 | dout("update_dentry_lease %p duration %lu ms ttl %lu\n", |
820 | dentry, duration, ttl); | |
355da1eb SW |
821 | |
822 | /* make lease_rdcache_gen match directory */ | |
823 | dir = dentry->d_parent->d_inode; | |
824 | di->lease_shared_gen = ceph_inode(dir)->i_shared_gen; | |
825 | ||
2f90b852 | 826 | if (duration == 0) |
355da1eb SW |
827 | goto out_unlock; |
828 | ||
829 | if (di->lease_gen == session->s_cap_gen && | |
830 | time_before(ttl, dentry->d_time)) | |
831 | goto out_unlock; /* we already have a newer lease. */ | |
832 | ||
833 | if (di->lease_session && di->lease_session != session) | |
834 | goto out_unlock; | |
835 | ||
836 | ceph_dentry_lru_touch(dentry); | |
837 | ||
838 | if (!di->lease_session) | |
839 | di->lease_session = ceph_get_mds_session(session); | |
840 | di->lease_gen = session->s_cap_gen; | |
841 | di->lease_seq = le32_to_cpu(lease->seq); | |
842 | di->lease_renew_after = half_ttl; | |
843 | di->lease_renew_from = 0; | |
844 | dentry->d_time = ttl; | |
845 | out_unlock: | |
846 | spin_unlock(&dentry->d_lock); | |
847 | return; | |
848 | } | |
849 | ||
1cd3935b SW |
850 | /* |
851 | * Set dentry's directory position based on the current dir's max, and | |
852 | * order it in d_subdirs, so that dcache_readdir behaves. | |
4f177264 SW |
853 | * |
854 | * Always called under directory's i_mutex. | |
1cd3935b SW |
855 | */ |
856 | static void ceph_set_dentry_offset(struct dentry *dn) | |
857 | { | |
858 | struct dentry *dir = dn->d_parent; | |
4f177264 | 859 | struct inode *inode = dir->d_inode; |
b8cd952b | 860 | struct ceph_inode_info *ci; |
1cd3935b SW |
861 | struct ceph_dentry_info *di; |
862 | ||
863 | BUG_ON(!inode); | |
864 | ||
b8cd952b | 865 | ci = ceph_inode(inode); |
1cd3935b SW |
866 | di = ceph_dentry(dn); |
867 | ||
be655596 | 868 | spin_lock(&ci->i_ceph_lock); |
2f276c51 | 869 | if (!__ceph_dir_is_complete(ci)) { |
be655596 | 870 | spin_unlock(&ci->i_ceph_lock); |
1cd3935b SW |
871 | return; |
872 | } | |
873 | di->offset = ceph_inode(inode)->i_max_offset++; | |
be655596 | 874 | spin_unlock(&ci->i_ceph_lock); |
1cd3935b | 875 | |
2fd6b7f5 NP |
876 | spin_lock(&dir->d_lock); |
877 | spin_lock_nested(&dn->d_lock, DENTRY_D_LOCK_NESTED); | |
13a4214c | 878 | list_move(&dn->d_u.d_child, &dir->d_subdirs); |
1cd3935b SW |
879 | dout("set_dentry_offset %p %lld (%p %p)\n", dn, di->offset, |
880 | dn->d_u.d_child.prev, dn->d_u.d_child.next); | |
881 | spin_unlock(&dn->d_lock); | |
2fd6b7f5 | 882 | spin_unlock(&dir->d_lock); |
1cd3935b SW |
883 | } |
884 | ||
355da1eb SW |
885 | /* |
886 | * splice a dentry to an inode. | |
887 | * caller must hold directory i_mutex for this to be safe. | |
888 | * | |
889 | * we will only rehash the resulting dentry if @prehash is | |
890 | * true; @prehash will be set to false (for the benefit of | |
891 | * the caller) if we fail. | |
892 | */ | |
893 | static struct dentry *splice_dentry(struct dentry *dn, struct inode *in, | |
467c5251 | 894 | bool *prehash, bool set_offset) |
355da1eb SW |
895 | { |
896 | struct dentry *realdn; | |
897 | ||
1cd3935b SW |
898 | BUG_ON(dn->d_inode); |
899 | ||
355da1eb SW |
900 | /* dn must be unhashed */ |
901 | if (!d_unhashed(dn)) | |
902 | d_drop(dn); | |
903 | realdn = d_materialise_unique(dn, in); | |
904 | if (IS_ERR(realdn)) { | |
d69ed05a SW |
905 | pr_err("splice_dentry error %ld %p inode %p ino %llx.%llx\n", |
906 | PTR_ERR(realdn), dn, in, ceph_vinop(in)); | |
355da1eb SW |
907 | if (prehash) |
908 | *prehash = false; /* don't rehash on error */ | |
909 | dn = realdn; /* note realdn contains the error */ | |
910 | goto out; | |
911 | } else if (realdn) { | |
912 | dout("dn %p (%d) spliced with %p (%d) " | |
913 | "inode %p ino %llx.%llx\n", | |
84d08fa8 AV |
914 | dn, d_count(dn), |
915 | realdn, d_count(realdn), | |
355da1eb SW |
916 | realdn->d_inode, ceph_vinop(realdn->d_inode)); |
917 | dput(dn); | |
918 | dn = realdn; | |
919 | } else { | |
920 | BUG_ON(!ceph_dentry(dn)); | |
355da1eb SW |
921 | dout("dn %p attached to %p ino %llx.%llx\n", |
922 | dn, dn->d_inode, ceph_vinop(dn->d_inode)); | |
923 | } | |
924 | if ((!prehash || *prehash) && d_unhashed(dn)) | |
925 | d_rehash(dn); | |
467c5251 SW |
926 | if (set_offset) |
927 | ceph_set_dentry_offset(dn); | |
355da1eb SW |
928 | out: |
929 | return dn; | |
930 | } | |
931 | ||
932 | /* | |
933 | * Incorporate results into the local cache. This is either just | |
934 | * one inode, or a directory, dentry, and possibly linked-to inode (e.g., | |
935 | * after a lookup). | |
936 | * | |
937 | * A reply may contain | |
938 | * a directory inode along with a dentry. | |
939 | * and/or a target inode | |
940 | * | |
941 | * Called with snap_rwsem (read). | |
942 | */ | |
943 | int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req, | |
944 | struct ceph_mds_session *session) | |
945 | { | |
946 | struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; | |
947 | struct inode *in = NULL; | |
948 | struct ceph_mds_reply_inode *ininfo; | |
949 | struct ceph_vino vino; | |
3d14c5d2 | 950 | struct ceph_fs_client *fsc = ceph_sb_to_client(sb); |
355da1eb SW |
951 | int i = 0; |
952 | int err = 0; | |
953 | ||
954 | dout("fill_trace %p is_dentry %d is_target %d\n", req, | |
955 | rinfo->head->is_dentry, rinfo->head->is_target); | |
956 | ||
957 | #if 0 | |
958 | /* | |
959 | * Debugging hook: | |
960 | * | |
961 | * If we resend completed ops to a recovering mds, we get no | |
962 | * trace. Since that is very rare, pretend this is the case | |
963 | * to ensure the 'no trace' handlers in the callers behave. | |
964 | * | |
965 | * Fill in inodes unconditionally to avoid breaking cap | |
966 | * invariants. | |
967 | */ | |
968 | if (rinfo->head->op & CEPH_MDS_OP_WRITE) { | |
969 | pr_info("fill_trace faking empty trace on %lld %s\n", | |
970 | req->r_tid, ceph_mds_op_name(rinfo->head->op)); | |
971 | if (rinfo->head->is_dentry) { | |
972 | rinfo->head->is_dentry = 0; | |
973 | err = fill_inode(req->r_locked_dir, | |
974 | &rinfo->diri, rinfo->dirfrag, | |
975 | session, req->r_request_started, -1); | |
976 | } | |
977 | if (rinfo->head->is_target) { | |
978 | rinfo->head->is_target = 0; | |
979 | ininfo = rinfo->targeti.in; | |
980 | vino.ino = le64_to_cpu(ininfo->ino); | |
981 | vino.snap = le64_to_cpu(ininfo->snapid); | |
982 | in = ceph_get_inode(sb, vino); | |
983 | err = fill_inode(in, &rinfo->targeti, NULL, | |
984 | session, req->r_request_started, | |
985 | req->r_fmode); | |
986 | iput(in); | |
987 | } | |
988 | } | |
989 | #endif | |
990 | ||
991 | if (!rinfo->head->is_target && !rinfo->head->is_dentry) { | |
992 | dout("fill_trace reply is empty!\n"); | |
167c9e35 SW |
993 | if (rinfo->head->result == 0 && req->r_locked_dir) |
994 | ceph_invalidate_dir_request(req); | |
355da1eb SW |
995 | return 0; |
996 | } | |
997 | ||
998 | if (rinfo->head->is_dentry) { | |
5b1daecd SW |
999 | struct inode *dir = req->r_locked_dir; |
1000 | ||
6c5e50fa SW |
1001 | if (dir) { |
1002 | err = fill_inode(dir, &rinfo->diri, rinfo->dirfrag, | |
1003 | session, req->r_request_started, -1, | |
1004 | &req->r_caps_reservation); | |
1005 | if (err < 0) | |
1006 | return err; | |
1007 | } else { | |
1008 | WARN_ON_ONCE(1); | |
1009 | } | |
5b1daecd SW |
1010 | } |
1011 | ||
9358c6d4 SW |
1012 | /* |
1013 | * ignore null lease/binding on snapdir ENOENT, or else we | |
1014 | * will have trouble splicing in the virtual snapdir later | |
1015 | */ | |
1016 | if (rinfo->head->is_dentry && !req->r_aborted && | |
6c5e50fa | 1017 | req->r_locked_dir && |
9358c6d4 | 1018 | (rinfo->head->is_target || strncmp(req->r_dentry->d_name.name, |
3d14c5d2 | 1019 | fsc->mount_options->snapdir_name, |
9358c6d4 | 1020 | req->r_dentry->d_name.len))) { |
355da1eb SW |
1021 | /* |
1022 | * lookup link rename : null -> possibly existing inode | |
1023 | * mknod symlink mkdir : null -> new inode | |
1024 | * unlink : linked -> null | |
1025 | */ | |
1026 | struct inode *dir = req->r_locked_dir; | |
1027 | struct dentry *dn = req->r_dentry; | |
1028 | bool have_dir_cap, have_lease; | |
1029 | ||
1030 | BUG_ON(!dn); | |
1031 | BUG_ON(!dir); | |
1032 | BUG_ON(dn->d_parent->d_inode != dir); | |
1033 | BUG_ON(ceph_ino(dir) != | |
1034 | le64_to_cpu(rinfo->diri.in->ino)); | |
1035 | BUG_ON(ceph_snap(dir) != | |
1036 | le64_to_cpu(rinfo->diri.in->snapid)); | |
1037 | ||
355da1eb SW |
1038 | /* do we have a lease on the whole dir? */ |
1039 | have_dir_cap = | |
1040 | (le32_to_cpu(rinfo->diri.in->cap.caps) & | |
1041 | CEPH_CAP_FILE_SHARED); | |
1042 | ||
1043 | /* do we have a dn lease? */ | |
1044 | have_lease = have_dir_cap || | |
2f90b852 | 1045 | le32_to_cpu(rinfo->dlease->duration_ms); |
355da1eb SW |
1046 | if (!have_lease) |
1047 | dout("fill_trace no dentry lease or dir cap\n"); | |
1048 | ||
1049 | /* rename? */ | |
1050 | if (req->r_old_dentry && req->r_op == CEPH_MDS_OP_RENAME) { | |
1051 | dout(" src %p '%.*s' dst %p '%.*s'\n", | |
1052 | req->r_old_dentry, | |
1053 | req->r_old_dentry->d_name.len, | |
1054 | req->r_old_dentry->d_name.name, | |
1055 | dn, dn->d_name.len, dn->d_name.name); | |
1056 | dout("fill_trace doing d_move %p -> %p\n", | |
1057 | req->r_old_dentry, dn); | |
c10f5e12 | 1058 | |
355da1eb SW |
1059 | d_move(req->r_old_dentry, dn); |
1060 | dout(" src %p '%.*s' dst %p '%.*s'\n", | |
1061 | req->r_old_dentry, | |
1062 | req->r_old_dentry->d_name.len, | |
1063 | req->r_old_dentry->d_name.name, | |
1064 | dn, dn->d_name.len, dn->d_name.name); | |
81a6cf2d | 1065 | |
c4a29f26 SW |
1066 | /* ensure target dentry is invalidated, despite |
1067 | rehashing bug in vfs_rename_dir */ | |
81a6cf2d SW |
1068 | ceph_invalidate_dentry_lease(dn); |
1069 | ||
09adc80c SW |
1070 | /* |
1071 | * d_move() puts the renamed dentry at the end of | |
1072 | * d_subdirs. We need to assign it an appropriate | |
2f276c51 YZ |
1073 | * directory offset so we can behave when dir is |
1074 | * complete. | |
09adc80c SW |
1075 | */ |
1076 | ceph_set_dentry_offset(req->r_old_dentry); | |
1077 | dout("dn %p gets new offset %lld\n", req->r_old_dentry, | |
1cd3935b | 1078 | ceph_dentry(req->r_old_dentry)->offset); |
81a6cf2d | 1079 | |
355da1eb SW |
1080 | dn = req->r_old_dentry; /* use old_dentry */ |
1081 | in = dn->d_inode; | |
1082 | } | |
1083 | ||
1084 | /* null dentry? */ | |
1085 | if (!rinfo->head->is_target) { | |
1086 | dout("fill_trace null dentry\n"); | |
1087 | if (dn->d_inode) { | |
1088 | dout("d_delete %p\n", dn); | |
1089 | d_delete(dn); | |
1090 | } else { | |
1091 | dout("d_instantiate %p NULL\n", dn); | |
1092 | d_instantiate(dn, NULL); | |
1093 | if (have_lease && d_unhashed(dn)) | |
1094 | d_rehash(dn); | |
1095 | update_dentry_lease(dn, rinfo->dlease, | |
1096 | session, | |
1097 | req->r_request_started); | |
1098 | } | |
1099 | goto done; | |
1100 | } | |
1101 | ||
1102 | /* attach proper inode */ | |
1103 | ininfo = rinfo->targeti.in; | |
1104 | vino.ino = le64_to_cpu(ininfo->ino); | |
1105 | vino.snap = le64_to_cpu(ininfo->snapid); | |
d8b16b3d SW |
1106 | in = dn->d_inode; |
1107 | if (!in) { | |
355da1eb SW |
1108 | in = ceph_get_inode(sb, vino); |
1109 | if (IS_ERR(in)) { | |
1110 | pr_err("fill_trace bad get_inode " | |
1111 | "%llx.%llx\n", vino.ino, vino.snap); | |
1112 | err = PTR_ERR(in); | |
2744c171 | 1113 | d_drop(dn); |
355da1eb SW |
1114 | goto done; |
1115 | } | |
467c5251 | 1116 | dn = splice_dentry(dn, in, &have_lease, true); |
355da1eb SW |
1117 | if (IS_ERR(dn)) { |
1118 | err = PTR_ERR(dn); | |
1119 | goto done; | |
1120 | } | |
1121 | req->r_dentry = dn; /* may have spliced */ | |
70b666c3 | 1122 | ihold(in); |
355da1eb SW |
1123 | } else if (ceph_ino(in) == vino.ino && |
1124 | ceph_snap(in) == vino.snap) { | |
70b666c3 | 1125 | ihold(in); |
355da1eb SW |
1126 | } else { |
1127 | dout(" %p links to %p %llx.%llx, not %llx.%llx\n", | |
1128 | dn, in, ceph_ino(in), ceph_snap(in), | |
1129 | vino.ino, vino.snap); | |
1130 | have_lease = false; | |
1131 | in = NULL; | |
1132 | } | |
1133 | ||
1134 | if (have_lease) | |
1135 | update_dentry_lease(dn, rinfo->dlease, session, | |
1136 | req->r_request_started); | |
1137 | dout(" final dn %p\n", dn); | |
1138 | i++; | |
79f9f99a SW |
1139 | } else if ((req->r_op == CEPH_MDS_OP_LOOKUPSNAP || |
1140 | req->r_op == CEPH_MDS_OP_MKSNAP) && !req->r_aborted) { | |
355da1eb SW |
1141 | struct dentry *dn = req->r_dentry; |
1142 | ||
1143 | /* fill out a snapdir LOOKUPSNAP dentry */ | |
1144 | BUG_ON(!dn); | |
1145 | BUG_ON(!req->r_locked_dir); | |
1146 | BUG_ON(ceph_snap(req->r_locked_dir) != CEPH_SNAPDIR); | |
1147 | ininfo = rinfo->targeti.in; | |
1148 | vino.ino = le64_to_cpu(ininfo->ino); | |
1149 | vino.snap = le64_to_cpu(ininfo->snapid); | |
1150 | in = ceph_get_inode(sb, vino); | |
1151 | if (IS_ERR(in)) { | |
1152 | pr_err("fill_inode get_inode badness %llx.%llx\n", | |
1153 | vino.ino, vino.snap); | |
1154 | err = PTR_ERR(in); | |
1155 | d_delete(dn); | |
1156 | goto done; | |
1157 | } | |
1158 | dout(" linking snapped dir %p to dn %p\n", in, dn); | |
467c5251 | 1159 | dn = splice_dentry(dn, in, NULL, true); |
355da1eb SW |
1160 | if (IS_ERR(dn)) { |
1161 | err = PTR_ERR(dn); | |
1162 | goto done; | |
1163 | } | |
1164 | req->r_dentry = dn; /* may have spliced */ | |
70b666c3 | 1165 | ihold(in); |
355da1eb SW |
1166 | rinfo->head->is_dentry = 1; /* fool notrace handlers */ |
1167 | } | |
1168 | ||
1169 | if (rinfo->head->is_target) { | |
1170 | vino.ino = le64_to_cpu(rinfo->targeti.in->ino); | |
1171 | vino.snap = le64_to_cpu(rinfo->targeti.in->snapid); | |
1172 | ||
1173 | if (in == NULL || ceph_ino(in) != vino.ino || | |
1174 | ceph_snap(in) != vino.snap) { | |
1175 | in = ceph_get_inode(sb, vino); | |
1176 | if (IS_ERR(in)) { | |
1177 | err = PTR_ERR(in); | |
1178 | goto done; | |
1179 | } | |
1180 | } | |
1181 | req->r_target_inode = in; | |
1182 | ||
1183 | err = fill_inode(in, | |
1184 | &rinfo->targeti, NULL, | |
1185 | session, req->r_request_started, | |
1186 | (le32_to_cpu(rinfo->head->result) == 0) ? | |
1187 | req->r_fmode : -1, | |
1188 | &req->r_caps_reservation); | |
1189 | if (err < 0) { | |
1190 | pr_err("fill_inode badness %p %llx.%llx\n", | |
1191 | in, ceph_vinop(in)); | |
1192 | goto done; | |
1193 | } | |
1194 | } | |
1195 | ||
1196 | done: | |
1197 | dout("fill_trace done err=%d\n", err); | |
1198 | return err; | |
1199 | } | |
1200 | ||
1201 | /* | |
1202 | * Prepopulate our cache with readdir results, leases, etc. | |
1203 | */ | |
79f9f99a SW |
1204 | static int readdir_prepopulate_inodes_only(struct ceph_mds_request *req, |
1205 | struct ceph_mds_session *session) | |
1206 | { | |
1207 | struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; | |
1208 | int i, err = 0; | |
1209 | ||
1210 | for (i = 0; i < rinfo->dir_nr; i++) { | |
1211 | struct ceph_vino vino; | |
1212 | struct inode *in; | |
1213 | int rc; | |
1214 | ||
1215 | vino.ino = le64_to_cpu(rinfo->dir_in[i].in->ino); | |
1216 | vino.snap = le64_to_cpu(rinfo->dir_in[i].in->snapid); | |
1217 | ||
1218 | in = ceph_get_inode(req->r_dentry->d_sb, vino); | |
1219 | if (IS_ERR(in)) { | |
1220 | err = PTR_ERR(in); | |
1221 | dout("new_inode badness got %d\n", err); | |
1222 | continue; | |
1223 | } | |
1224 | rc = fill_inode(in, &rinfo->dir_in[i], NULL, session, | |
1225 | req->r_request_started, -1, | |
1226 | &req->r_caps_reservation); | |
1227 | if (rc < 0) { | |
1228 | pr_err("fill_inode badness on %p got %d\n", in, rc); | |
1229 | err = rc; | |
1230 | continue; | |
1231 | } | |
1232 | } | |
1233 | ||
1234 | return err; | |
1235 | } | |
1236 | ||
355da1eb SW |
1237 | int ceph_readdir_prepopulate(struct ceph_mds_request *req, |
1238 | struct ceph_mds_session *session) | |
1239 | { | |
1240 | struct dentry *parent = req->r_dentry; | |
1241 | struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; | |
1242 | struct qstr dname; | |
1243 | struct dentry *dn; | |
1244 | struct inode *in; | |
1245 | int err = 0, i; | |
1246 | struct inode *snapdir = NULL; | |
1247 | struct ceph_mds_request_head *rhead = req->r_request->front.iov_base; | |
1248 | u64 frag = le32_to_cpu(rhead->args.readdir.frag); | |
1249 | struct ceph_dentry_info *di; | |
1250 | ||
79f9f99a SW |
1251 | if (req->r_aborted) |
1252 | return readdir_prepopulate_inodes_only(req, session); | |
355da1eb SW |
1253 | |
1254 | if (le32_to_cpu(rinfo->head->op) == CEPH_MDS_OP_LSSNAP) { | |
1255 | snapdir = ceph_get_snapdir(parent->d_inode); | |
1256 | parent = d_find_alias(snapdir); | |
1257 | dout("readdir_prepopulate %d items under SNAPDIR dn %p\n", | |
1258 | rinfo->dir_nr, parent); | |
1259 | } else { | |
1260 | dout("readdir_prepopulate %d items under dn %p\n", | |
1261 | rinfo->dir_nr, parent); | |
1262 | if (rinfo->dir_dir) | |
1263 | ceph_fill_dirfrag(parent->d_inode, rinfo->dir_dir); | |
1264 | } | |
1265 | ||
1266 | for (i = 0; i < rinfo->dir_nr; i++) { | |
1267 | struct ceph_vino vino; | |
1268 | ||
1269 | dname.name = rinfo->dir_dname[i]; | |
1270 | dname.len = rinfo->dir_dname_len[i]; | |
1271 | dname.hash = full_name_hash(dname.name, dname.len); | |
1272 | ||
1273 | vino.ino = le64_to_cpu(rinfo->dir_in[i].in->ino); | |
1274 | vino.snap = le64_to_cpu(rinfo->dir_in[i].in->snapid); | |
1275 | ||
1276 | retry_lookup: | |
1277 | dn = d_lookup(parent, &dname); | |
1278 | dout("d_lookup on parent=%p name=%.*s got %p\n", | |
1279 | parent, dname.len, dname.name, dn); | |
1280 | ||
1281 | if (!dn) { | |
1282 | dn = d_alloc(parent, &dname); | |
1283 | dout("d_alloc %p '%.*s' = %p\n", parent, | |
1284 | dname.len, dname.name, dn); | |
1285 | if (dn == NULL) { | |
1286 | dout("d_alloc badness\n"); | |
1287 | err = -ENOMEM; | |
1288 | goto out; | |
1289 | } | |
1290 | err = ceph_init_dentry(dn); | |
8c696737 SW |
1291 | if (err < 0) { |
1292 | dput(dn); | |
355da1eb | 1293 | goto out; |
8c696737 | 1294 | } |
355da1eb SW |
1295 | } else if (dn->d_inode && |
1296 | (ceph_ino(dn->d_inode) != vino.ino || | |
1297 | ceph_snap(dn->d_inode) != vino.snap)) { | |
1298 | dout(" dn %p points to wrong inode %p\n", | |
1299 | dn, dn->d_inode); | |
1300 | d_delete(dn); | |
1301 | dput(dn); | |
1302 | goto retry_lookup; | |
1303 | } else { | |
1304 | /* reorder parent's d_subdirs */ | |
2fd6b7f5 NP |
1305 | spin_lock(&parent->d_lock); |
1306 | spin_lock_nested(&dn->d_lock, DENTRY_D_LOCK_NESTED); | |
355da1eb SW |
1307 | list_move(&dn->d_u.d_child, &parent->d_subdirs); |
1308 | spin_unlock(&dn->d_lock); | |
2fd6b7f5 | 1309 | spin_unlock(&parent->d_lock); |
355da1eb SW |
1310 | } |
1311 | ||
1312 | di = dn->d_fsdata; | |
1313 | di->offset = ceph_make_fpos(frag, i + req->r_readdir_offset); | |
1314 | ||
1315 | /* inode */ | |
1316 | if (dn->d_inode) { | |
1317 | in = dn->d_inode; | |
1318 | } else { | |
1319 | in = ceph_get_inode(parent->d_sb, vino); | |
ac1f12ef | 1320 | if (IS_ERR(in)) { |
355da1eb | 1321 | dout("new_inode badness\n"); |
2744c171 | 1322 | d_drop(dn); |
355da1eb | 1323 | dput(dn); |
ac1f12ef | 1324 | err = PTR_ERR(in); |
355da1eb SW |
1325 | goto out; |
1326 | } | |
467c5251 | 1327 | dn = splice_dentry(dn, in, NULL, false); |
d69ed05a SW |
1328 | if (IS_ERR(dn)) |
1329 | dn = NULL; | |
355da1eb SW |
1330 | } |
1331 | ||
1332 | if (fill_inode(in, &rinfo->dir_in[i], NULL, session, | |
1333 | req->r_request_started, -1, | |
1334 | &req->r_caps_reservation) < 0) { | |
1335 | pr_err("fill_inode badness on %p\n", in); | |
d69ed05a | 1336 | goto next_item; |
355da1eb | 1337 | } |
d69ed05a SW |
1338 | if (dn) |
1339 | update_dentry_lease(dn, rinfo->dir_dlease[i], | |
1340 | req->r_session, | |
1341 | req->r_request_started); | |
1342 | next_item: | |
1343 | if (dn) | |
1344 | dput(dn); | |
355da1eb SW |
1345 | } |
1346 | req->r_did_prepopulate = true; | |
1347 | ||
1348 | out: | |
1349 | if (snapdir) { | |
1350 | iput(snapdir); | |
1351 | dput(parent); | |
1352 | } | |
1353 | dout("readdir_prepopulate done\n"); | |
1354 | return err; | |
1355 | } | |
1356 | ||
1357 | int ceph_inode_set_size(struct inode *inode, loff_t size) | |
1358 | { | |
1359 | struct ceph_inode_info *ci = ceph_inode(inode); | |
1360 | int ret = 0; | |
1361 | ||
be655596 | 1362 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
1363 | dout("set_size %p %llu -> %llu\n", inode, inode->i_size, size); |
1364 | inode->i_size = size; | |
1365 | inode->i_blocks = (size + (1 << 9) - 1) >> 9; | |
1366 | ||
1367 | /* tell the MDS if we are approaching max_size */ | |
1368 | if ((size << 1) >= ci->i_max_size && | |
1369 | (ci->i_reported_size << 1) < ci->i_max_size) | |
1370 | ret = 1; | |
1371 | ||
be655596 | 1372 | spin_unlock(&ci->i_ceph_lock); |
355da1eb SW |
1373 | return ret; |
1374 | } | |
1375 | ||
1376 | /* | |
1377 | * Write back inode data in a worker thread. (This can't be done | |
1378 | * in the message handler context.) | |
1379 | */ | |
3c6f6b79 SW |
1380 | void ceph_queue_writeback(struct inode *inode) |
1381 | { | |
15a2015f | 1382 | ihold(inode); |
3c6f6b79 SW |
1383 | if (queue_work(ceph_inode_to_client(inode)->wb_wq, |
1384 | &ceph_inode(inode)->i_wb_work)) { | |
2c27c9a5 | 1385 | dout("ceph_queue_writeback %p\n", inode); |
3c6f6b79 | 1386 | } else { |
2c27c9a5 | 1387 | dout("ceph_queue_writeback %p failed\n", inode); |
15a2015f | 1388 | iput(inode); |
3c6f6b79 SW |
1389 | } |
1390 | } | |
1391 | ||
1392 | static void ceph_writeback_work(struct work_struct *work) | |
355da1eb SW |
1393 | { |
1394 | struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info, | |
1395 | i_wb_work); | |
1396 | struct inode *inode = &ci->vfs_inode; | |
1397 | ||
1398 | dout("writeback %p\n", inode); | |
1399 | filemap_fdatawrite(&inode->i_data); | |
1400 | iput(inode); | |
1401 | } | |
1402 | ||
3c6f6b79 SW |
1403 | /* |
1404 | * queue an async invalidation | |
1405 | */ | |
1406 | void ceph_queue_invalidate(struct inode *inode) | |
1407 | { | |
15a2015f | 1408 | ihold(inode); |
3c6f6b79 SW |
1409 | if (queue_work(ceph_inode_to_client(inode)->pg_inv_wq, |
1410 | &ceph_inode(inode)->i_pg_inv_work)) { | |
1411 | dout("ceph_queue_invalidate %p\n", inode); | |
3c6f6b79 SW |
1412 | } else { |
1413 | dout("ceph_queue_invalidate %p failed\n", inode); | |
15a2015f | 1414 | iput(inode); |
3c6f6b79 SW |
1415 | } |
1416 | } | |
1417 | ||
355da1eb SW |
1418 | /* |
1419 | * Invalidate inode pages in a worker thread. (This can't be done | |
1420 | * in the message handler context.) | |
1421 | */ | |
3c6f6b79 | 1422 | static void ceph_invalidate_work(struct work_struct *work) |
355da1eb SW |
1423 | { |
1424 | struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info, | |
1425 | i_pg_inv_work); | |
1426 | struct inode *inode = &ci->vfs_inode; | |
1427 | u32 orig_gen; | |
1428 | int check = 0; | |
1429 | ||
be655596 | 1430 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
1431 | dout("invalidate_pages %p gen %d revoking %d\n", inode, |
1432 | ci->i_rdcache_gen, ci->i_rdcache_revoking); | |
cd045cb4 | 1433 | if (ci->i_rdcache_revoking != ci->i_rdcache_gen) { |
355da1eb | 1434 | /* nevermind! */ |
be655596 | 1435 | spin_unlock(&ci->i_ceph_lock); |
355da1eb SW |
1436 | goto out; |
1437 | } | |
1438 | orig_gen = ci->i_rdcache_gen; | |
be655596 | 1439 | spin_unlock(&ci->i_ceph_lock); |
355da1eb | 1440 | |
83eaea22 | 1441 | truncate_inode_pages(&inode->i_data, 0); |
355da1eb | 1442 | |
be655596 | 1443 | spin_lock(&ci->i_ceph_lock); |
cd045cb4 SW |
1444 | if (orig_gen == ci->i_rdcache_gen && |
1445 | orig_gen == ci->i_rdcache_revoking) { | |
355da1eb SW |
1446 | dout("invalidate_pages %p gen %d successful\n", inode, |
1447 | ci->i_rdcache_gen); | |
cd045cb4 | 1448 | ci->i_rdcache_revoking--; |
355da1eb SW |
1449 | check = 1; |
1450 | } else { | |
cd045cb4 SW |
1451 | dout("invalidate_pages %p gen %d raced, now %d revoking %d\n", |
1452 | inode, orig_gen, ci->i_rdcache_gen, | |
1453 | ci->i_rdcache_revoking); | |
355da1eb | 1454 | } |
be655596 | 1455 | spin_unlock(&ci->i_ceph_lock); |
355da1eb SW |
1456 | |
1457 | if (check) | |
1458 | ceph_check_caps(ci, 0, NULL); | |
1459 | out: | |
1460 | iput(inode); | |
1461 | } | |
1462 | ||
1463 | ||
1464 | /* | |
3f99969f | 1465 | * called by trunc_wq; |
355da1eb SW |
1466 | * |
1467 | * We also truncate in a separate thread as well. | |
1468 | */ | |
3c6f6b79 | 1469 | static void ceph_vmtruncate_work(struct work_struct *work) |
355da1eb SW |
1470 | { |
1471 | struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info, | |
1472 | i_vmtruncate_work); | |
1473 | struct inode *inode = &ci->vfs_inode; | |
1474 | ||
1475 | dout("vmtruncate_work %p\n", inode); | |
85ce127a YZ |
1476 | if (!mutex_trylock(&inode->i_mutex)) { |
1477 | /* | |
1478 | * the i_mutex can be hold by a writer who is waiting for | |
1479 | * caps. wake up waiters, they will do pending vmtruncate. | |
1480 | */ | |
1481 | wake_up_all(&ci->i_cap_wq); | |
1482 | mutex_lock(&inode->i_mutex); | |
1483 | } | |
b415bf4f YZ |
1484 | __ceph_do_pending_vmtruncate(inode); |
1485 | mutex_unlock(&inode->i_mutex); | |
355da1eb SW |
1486 | iput(inode); |
1487 | } | |
1488 | ||
3c6f6b79 SW |
1489 | /* |
1490 | * Queue an async vmtruncate. If we fail to queue work, we will handle | |
1491 | * the truncation the next time we call __ceph_do_pending_vmtruncate. | |
1492 | */ | |
1493 | void ceph_queue_vmtruncate(struct inode *inode) | |
1494 | { | |
1495 | struct ceph_inode_info *ci = ceph_inode(inode); | |
1496 | ||
15a2015f | 1497 | ihold(inode); |
640ef79d | 1498 | if (queue_work(ceph_sb_to_client(inode->i_sb)->trunc_wq, |
3c6f6b79 SW |
1499 | &ci->i_vmtruncate_work)) { |
1500 | dout("ceph_queue_vmtruncate %p\n", inode); | |
3c6f6b79 SW |
1501 | } else { |
1502 | dout("ceph_queue_vmtruncate %p failed, pending=%d\n", | |
1503 | inode, ci->i_truncate_pending); | |
15a2015f | 1504 | iput(inode); |
3c6f6b79 SW |
1505 | } |
1506 | } | |
1507 | ||
355da1eb | 1508 | /* |
355da1eb SW |
1509 | * Make sure any pending truncation is applied before doing anything |
1510 | * that may depend on it. | |
1511 | */ | |
b415bf4f | 1512 | void __ceph_do_pending_vmtruncate(struct inode *inode) |
355da1eb SW |
1513 | { |
1514 | struct ceph_inode_info *ci = ceph_inode(inode); | |
1515 | u64 to; | |
a85f50b6 | 1516 | int wrbuffer_refs, finish = 0; |
355da1eb SW |
1517 | |
1518 | retry: | |
be655596 | 1519 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
1520 | if (ci->i_truncate_pending == 0) { |
1521 | dout("__do_pending_vmtruncate %p none pending\n", inode); | |
be655596 | 1522 | spin_unlock(&ci->i_ceph_lock); |
355da1eb SW |
1523 | return; |
1524 | } | |
1525 | ||
1526 | /* | |
1527 | * make sure any dirty snapped pages are flushed before we | |
1528 | * possibly truncate them.. so write AND block! | |
1529 | */ | |
1530 | if (ci->i_wrbuffer_ref_head < ci->i_wrbuffer_ref) { | |
1531 | dout("__do_pending_vmtruncate %p flushing snaps first\n", | |
1532 | inode); | |
be655596 | 1533 | spin_unlock(&ci->i_ceph_lock); |
355da1eb SW |
1534 | filemap_write_and_wait_range(&inode->i_data, 0, |
1535 | inode->i_sb->s_maxbytes); | |
1536 | goto retry; | |
1537 | } | |
1538 | ||
1539 | to = ci->i_truncate_size; | |
1540 | wrbuffer_refs = ci->i_wrbuffer_ref; | |
1541 | dout("__do_pending_vmtruncate %p (%d) to %lld\n", inode, | |
1542 | ci->i_truncate_pending, to); | |
be655596 | 1543 | spin_unlock(&ci->i_ceph_lock); |
355da1eb SW |
1544 | |
1545 | truncate_inode_pages(inode->i_mapping, to); | |
1546 | ||
be655596 | 1547 | spin_lock(&ci->i_ceph_lock); |
a85f50b6 YZ |
1548 | if (to == ci->i_truncate_size) { |
1549 | ci->i_truncate_pending = 0; | |
1550 | finish = 1; | |
1551 | } | |
be655596 | 1552 | spin_unlock(&ci->i_ceph_lock); |
a85f50b6 YZ |
1553 | if (!finish) |
1554 | goto retry; | |
355da1eb SW |
1555 | |
1556 | if (wrbuffer_refs == 0) | |
1557 | ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL); | |
a85f50b6 YZ |
1558 | |
1559 | wake_up_all(&ci->i_cap_wq); | |
355da1eb SW |
1560 | } |
1561 | ||
1562 | ||
1563 | /* | |
1564 | * symlinks | |
1565 | */ | |
1566 | static void *ceph_sym_follow_link(struct dentry *dentry, struct nameidata *nd) | |
1567 | { | |
1568 | struct ceph_inode_info *ci = ceph_inode(dentry->d_inode); | |
1569 | nd_set_link(nd, ci->i_symlink); | |
1570 | return NULL; | |
1571 | } | |
1572 | ||
1573 | static const struct inode_operations ceph_symlink_iops = { | |
1574 | .readlink = generic_readlink, | |
1575 | .follow_link = ceph_sym_follow_link, | |
0b932672 YZ |
1576 | .setattr = ceph_setattr, |
1577 | .getattr = ceph_getattr, | |
1578 | .setxattr = ceph_setxattr, | |
1579 | .getxattr = ceph_getxattr, | |
1580 | .listxattr = ceph_listxattr, | |
1581 | .removexattr = ceph_removexattr, | |
355da1eb SW |
1582 | }; |
1583 | ||
1584 | /* | |
1585 | * setattr | |
1586 | */ | |
1587 | int ceph_setattr(struct dentry *dentry, struct iattr *attr) | |
1588 | { | |
1589 | struct inode *inode = dentry->d_inode; | |
1590 | struct ceph_inode_info *ci = ceph_inode(inode); | |
5f21c96d | 1591 | struct inode *parent_inode; |
355da1eb SW |
1592 | const unsigned int ia_valid = attr->ia_valid; |
1593 | struct ceph_mds_request *req; | |
3d14c5d2 | 1594 | struct ceph_mds_client *mdsc = ceph_sb_to_client(dentry->d_sb)->mdsc; |
355da1eb SW |
1595 | int issued; |
1596 | int release = 0, dirtied = 0; | |
1597 | int mask = 0; | |
1598 | int err = 0; | |
fca65b4a | 1599 | int inode_dirty_flags = 0; |
355da1eb SW |
1600 | |
1601 | if (ceph_snap(inode) != CEPH_NOSNAP) | |
1602 | return -EROFS; | |
1603 | ||
b415bf4f | 1604 | __ceph_do_pending_vmtruncate(inode); |
355da1eb SW |
1605 | |
1606 | err = inode_change_ok(inode, attr); | |
1607 | if (err != 0) | |
1608 | return err; | |
1609 | ||
1610 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETATTR, | |
1611 | USE_AUTH_MDS); | |
1612 | if (IS_ERR(req)) | |
1613 | return PTR_ERR(req); | |
1614 | ||
be655596 | 1615 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
1616 | issued = __ceph_caps_issued(ci, NULL); |
1617 | dout("setattr %p issued %s\n", inode, ceph_cap_string(issued)); | |
1618 | ||
1619 | if (ia_valid & ATTR_UID) { | |
1620 | dout("setattr %p uid %d -> %d\n", inode, | |
bd2bae6a EB |
1621 | from_kuid(&init_user_ns, inode->i_uid), |
1622 | from_kuid(&init_user_ns, attr->ia_uid)); | |
355da1eb SW |
1623 | if (issued & CEPH_CAP_AUTH_EXCL) { |
1624 | inode->i_uid = attr->ia_uid; | |
1625 | dirtied |= CEPH_CAP_AUTH_EXCL; | |
1626 | } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || | |
ab871b90 EB |
1627 | !uid_eq(attr->ia_uid, inode->i_uid)) { |
1628 | req->r_args.setattr.uid = cpu_to_le32( | |
1629 | from_kuid(&init_user_ns, attr->ia_uid)); | |
355da1eb SW |
1630 | mask |= CEPH_SETATTR_UID; |
1631 | release |= CEPH_CAP_AUTH_SHARED; | |
1632 | } | |
1633 | } | |
1634 | if (ia_valid & ATTR_GID) { | |
1635 | dout("setattr %p gid %d -> %d\n", inode, | |
bd2bae6a EB |
1636 | from_kgid(&init_user_ns, inode->i_gid), |
1637 | from_kgid(&init_user_ns, attr->ia_gid)); | |
355da1eb SW |
1638 | if (issued & CEPH_CAP_AUTH_EXCL) { |
1639 | inode->i_gid = attr->ia_gid; | |
1640 | dirtied |= CEPH_CAP_AUTH_EXCL; | |
1641 | } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || | |
ab871b90 EB |
1642 | !gid_eq(attr->ia_gid, inode->i_gid)) { |
1643 | req->r_args.setattr.gid = cpu_to_le32( | |
1644 | from_kgid(&init_user_ns, attr->ia_gid)); | |
355da1eb SW |
1645 | mask |= CEPH_SETATTR_GID; |
1646 | release |= CEPH_CAP_AUTH_SHARED; | |
1647 | } | |
1648 | } | |
1649 | if (ia_valid & ATTR_MODE) { | |
1650 | dout("setattr %p mode 0%o -> 0%o\n", inode, inode->i_mode, | |
1651 | attr->ia_mode); | |
1652 | if (issued & CEPH_CAP_AUTH_EXCL) { | |
1653 | inode->i_mode = attr->ia_mode; | |
1654 | dirtied |= CEPH_CAP_AUTH_EXCL; | |
1655 | } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || | |
1656 | attr->ia_mode != inode->i_mode) { | |
1657 | req->r_args.setattr.mode = cpu_to_le32(attr->ia_mode); | |
1658 | mask |= CEPH_SETATTR_MODE; | |
1659 | release |= CEPH_CAP_AUTH_SHARED; | |
1660 | } | |
1661 | } | |
1662 | ||
1663 | if (ia_valid & ATTR_ATIME) { | |
1664 | dout("setattr %p atime %ld.%ld -> %ld.%ld\n", inode, | |
1665 | inode->i_atime.tv_sec, inode->i_atime.tv_nsec, | |
1666 | attr->ia_atime.tv_sec, attr->ia_atime.tv_nsec); | |
1667 | if (issued & CEPH_CAP_FILE_EXCL) { | |
1668 | ci->i_time_warp_seq++; | |
1669 | inode->i_atime = attr->ia_atime; | |
1670 | dirtied |= CEPH_CAP_FILE_EXCL; | |
1671 | } else if ((issued & CEPH_CAP_FILE_WR) && | |
1672 | timespec_compare(&inode->i_atime, | |
1673 | &attr->ia_atime) < 0) { | |
1674 | inode->i_atime = attr->ia_atime; | |
1675 | dirtied |= CEPH_CAP_FILE_WR; | |
1676 | } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || | |
1677 | !timespec_equal(&inode->i_atime, &attr->ia_atime)) { | |
1678 | ceph_encode_timespec(&req->r_args.setattr.atime, | |
1679 | &attr->ia_atime); | |
1680 | mask |= CEPH_SETATTR_ATIME; | |
1681 | release |= CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_RD | | |
1682 | CEPH_CAP_FILE_WR; | |
1683 | } | |
1684 | } | |
1685 | if (ia_valid & ATTR_MTIME) { | |
1686 | dout("setattr %p mtime %ld.%ld -> %ld.%ld\n", inode, | |
1687 | inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec, | |
1688 | attr->ia_mtime.tv_sec, attr->ia_mtime.tv_nsec); | |
1689 | if (issued & CEPH_CAP_FILE_EXCL) { | |
1690 | ci->i_time_warp_seq++; | |
1691 | inode->i_mtime = attr->ia_mtime; | |
1692 | dirtied |= CEPH_CAP_FILE_EXCL; | |
1693 | } else if ((issued & CEPH_CAP_FILE_WR) && | |
1694 | timespec_compare(&inode->i_mtime, | |
1695 | &attr->ia_mtime) < 0) { | |
1696 | inode->i_mtime = attr->ia_mtime; | |
1697 | dirtied |= CEPH_CAP_FILE_WR; | |
1698 | } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || | |
1699 | !timespec_equal(&inode->i_mtime, &attr->ia_mtime)) { | |
1700 | ceph_encode_timespec(&req->r_args.setattr.mtime, | |
1701 | &attr->ia_mtime); | |
1702 | mask |= CEPH_SETATTR_MTIME; | |
1703 | release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_RD | | |
1704 | CEPH_CAP_FILE_WR; | |
1705 | } | |
1706 | } | |
1707 | if (ia_valid & ATTR_SIZE) { | |
1708 | dout("setattr %p size %lld -> %lld\n", inode, | |
1709 | inode->i_size, attr->ia_size); | |
1710 | if (attr->ia_size > inode->i_sb->s_maxbytes) { | |
1711 | err = -EINVAL; | |
1712 | goto out; | |
1713 | } | |
1714 | if ((issued & CEPH_CAP_FILE_EXCL) && | |
1715 | attr->ia_size > inode->i_size) { | |
1716 | inode->i_size = attr->ia_size; | |
355da1eb SW |
1717 | inode->i_blocks = |
1718 | (attr->ia_size + (1 << 9) - 1) >> 9; | |
1719 | inode->i_ctime = attr->ia_ctime; | |
1720 | ci->i_reported_size = attr->ia_size; | |
1721 | dirtied |= CEPH_CAP_FILE_EXCL; | |
1722 | } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || | |
1723 | attr->ia_size != inode->i_size) { | |
1724 | req->r_args.setattr.size = cpu_to_le64(attr->ia_size); | |
1725 | req->r_args.setattr.old_size = | |
1726 | cpu_to_le64(inode->i_size); | |
1727 | mask |= CEPH_SETATTR_SIZE; | |
1728 | release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_RD | | |
1729 | CEPH_CAP_FILE_WR; | |
1730 | } | |
1731 | } | |
1732 | ||
1733 | /* these do nothing */ | |
1734 | if (ia_valid & ATTR_CTIME) { | |
1735 | bool only = (ia_valid & (ATTR_SIZE|ATTR_MTIME|ATTR_ATIME| | |
1736 | ATTR_MODE|ATTR_UID|ATTR_GID)) == 0; | |
1737 | dout("setattr %p ctime %ld.%ld -> %ld.%ld (%s)\n", inode, | |
1738 | inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec, | |
1739 | attr->ia_ctime.tv_sec, attr->ia_ctime.tv_nsec, | |
1740 | only ? "ctime only" : "ignored"); | |
1741 | inode->i_ctime = attr->ia_ctime; | |
1742 | if (only) { | |
1743 | /* | |
1744 | * if kernel wants to dirty ctime but nothing else, | |
1745 | * we need to choose a cap to dirty under, or do | |
1746 | * a almost-no-op setattr | |
1747 | */ | |
1748 | if (issued & CEPH_CAP_AUTH_EXCL) | |
1749 | dirtied |= CEPH_CAP_AUTH_EXCL; | |
1750 | else if (issued & CEPH_CAP_FILE_EXCL) | |
1751 | dirtied |= CEPH_CAP_FILE_EXCL; | |
1752 | else if (issued & CEPH_CAP_XATTR_EXCL) | |
1753 | dirtied |= CEPH_CAP_XATTR_EXCL; | |
1754 | else | |
1755 | mask |= CEPH_SETATTR_CTIME; | |
1756 | } | |
1757 | } | |
1758 | if (ia_valid & ATTR_FILE) | |
1759 | dout("setattr %p ATTR_FILE ... hrm!\n", inode); | |
1760 | ||
1761 | if (dirtied) { | |
fca65b4a | 1762 | inode_dirty_flags = __ceph_mark_dirty_caps(ci, dirtied); |
355da1eb SW |
1763 | inode->i_ctime = CURRENT_TIME; |
1764 | } | |
1765 | ||
1766 | release &= issued; | |
be655596 | 1767 | spin_unlock(&ci->i_ceph_lock); |
355da1eb | 1768 | |
fca65b4a SW |
1769 | if (inode_dirty_flags) |
1770 | __mark_inode_dirty(inode, inode_dirty_flags); | |
1771 | ||
355da1eb | 1772 | if (mask) { |
70b666c3 SW |
1773 | req->r_inode = inode; |
1774 | ihold(inode); | |
355da1eb SW |
1775 | req->r_inode_drop = release; |
1776 | req->r_args.setattr.mask = cpu_to_le32(mask); | |
1777 | req->r_num_caps = 1; | |
5f21c96d | 1778 | parent_inode = ceph_get_dentry_parent_inode(dentry); |
355da1eb | 1779 | err = ceph_mdsc_do_request(mdsc, parent_inode, req); |
5f21c96d | 1780 | iput(parent_inode); |
355da1eb SW |
1781 | } |
1782 | dout("setattr %p result=%d (%s locally, %d remote)\n", inode, err, | |
1783 | ceph_cap_string(dirtied), mask); | |
1784 | ||
1785 | ceph_mdsc_put_request(req); | |
b415bf4f | 1786 | __ceph_do_pending_vmtruncate(inode); |
355da1eb SW |
1787 | return err; |
1788 | out: | |
be655596 | 1789 | spin_unlock(&ci->i_ceph_lock); |
355da1eb SW |
1790 | ceph_mdsc_put_request(req); |
1791 | return err; | |
1792 | } | |
1793 | ||
1794 | /* | |
1795 | * Verify that we have a lease on the given mask. If not, | |
1796 | * do a getattr against an mds. | |
1797 | */ | |
1798 | int ceph_do_getattr(struct inode *inode, int mask) | |
1799 | { | |
3d14c5d2 YS |
1800 | struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb); |
1801 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
355da1eb SW |
1802 | struct ceph_mds_request *req; |
1803 | int err; | |
1804 | ||
1805 | if (ceph_snap(inode) == CEPH_SNAPDIR) { | |
1806 | dout("do_getattr inode %p SNAPDIR\n", inode); | |
1807 | return 0; | |
1808 | } | |
1809 | ||
b7495fc2 | 1810 | dout("do_getattr inode %p mask %s mode 0%o\n", inode, ceph_cap_string(mask), inode->i_mode); |
355da1eb SW |
1811 | if (ceph_caps_issued_mask(ceph_inode(inode), mask, 1)) |
1812 | return 0; | |
1813 | ||
1814 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS); | |
1815 | if (IS_ERR(req)) | |
1816 | return PTR_ERR(req); | |
70b666c3 SW |
1817 | req->r_inode = inode; |
1818 | ihold(inode); | |
355da1eb SW |
1819 | req->r_num_caps = 1; |
1820 | req->r_args.getattr.mask = cpu_to_le32(mask); | |
1821 | err = ceph_mdsc_do_request(mdsc, NULL, req); | |
1822 | ceph_mdsc_put_request(req); | |
1823 | dout("do_getattr result=%d\n", err); | |
1824 | return err; | |
1825 | } | |
1826 | ||
1827 | ||
1828 | /* | |
1829 | * Check inode permissions. We verify we have a valid value for | |
1830 | * the AUTH cap, then call the generic handler. | |
1831 | */ | |
10556cb2 | 1832 | int ceph_permission(struct inode *inode, int mask) |
355da1eb | 1833 | { |
b74c79e9 NP |
1834 | int err; |
1835 | ||
10556cb2 | 1836 | if (mask & MAY_NOT_BLOCK) |
b74c79e9 NP |
1837 | return -ECHILD; |
1838 | ||
1839 | err = ceph_do_getattr(inode, CEPH_CAP_AUTH_SHARED); | |
355da1eb SW |
1840 | |
1841 | if (!err) | |
2830ba7f | 1842 | err = generic_permission(inode, mask); |
355da1eb SW |
1843 | return err; |
1844 | } | |
1845 | ||
1846 | /* | |
1847 | * Get all attributes. Hopefully somedata we'll have a statlite() | |
1848 | * and can limit the fields we require to be accurate. | |
1849 | */ | |
1850 | int ceph_getattr(struct vfsmount *mnt, struct dentry *dentry, | |
1851 | struct kstat *stat) | |
1852 | { | |
1853 | struct inode *inode = dentry->d_inode; | |
232d4b01 | 1854 | struct ceph_inode_info *ci = ceph_inode(inode); |
355da1eb SW |
1855 | int err; |
1856 | ||
1857 | err = ceph_do_getattr(inode, CEPH_STAT_CAP_INODE_ALL); | |
1858 | if (!err) { | |
1859 | generic_fillattr(inode, stat); | |
ad1fee96 | 1860 | stat->ino = ceph_translate_ino(inode->i_sb, inode->i_ino); |
355da1eb SW |
1861 | if (ceph_snap(inode) != CEPH_NOSNAP) |
1862 | stat->dev = ceph_snap(inode); | |
1863 | else | |
1864 | stat->dev = 0; | |
232d4b01 | 1865 | if (S_ISDIR(inode->i_mode)) { |
1c1266bb YS |
1866 | if (ceph_test_mount_opt(ceph_sb_to_client(inode->i_sb), |
1867 | RBYTES)) | |
1868 | stat->size = ci->i_rbytes; | |
1869 | else | |
1870 | stat->size = ci->i_files + ci->i_subdirs; | |
232d4b01 | 1871 | stat->blocks = 0; |
355da1eb | 1872 | stat->blksize = 65536; |
232d4b01 | 1873 | } |
355da1eb SW |
1874 | } |
1875 | return err; | |
1876 | } |