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 | ||
64 | /* | |
65 | * get/constuct snapdir inode for a given directory | |
66 | */ | |
67 | struct inode *ceph_get_snapdir(struct inode *parent) | |
68 | { | |
69 | struct ceph_vino vino = { | |
70 | .ino = ceph_ino(parent), | |
71 | .snap = CEPH_SNAPDIR, | |
72 | }; | |
73 | struct inode *inode = ceph_get_inode(parent->i_sb, vino); | |
b377ff13 | 74 | struct ceph_inode_info *ci = ceph_inode(inode); |
355da1eb SW |
75 | |
76 | BUG_ON(!S_ISDIR(parent->i_mode)); | |
77 | if (IS_ERR(inode)) | |
7e34bc52 | 78 | return inode; |
355da1eb SW |
79 | inode->i_mode = parent->i_mode; |
80 | inode->i_uid = parent->i_uid; | |
81 | inode->i_gid = parent->i_gid; | |
82 | inode->i_op = &ceph_dir_iops; | |
83 | inode->i_fop = &ceph_dir_fops; | |
b377ff13 SW |
84 | ci->i_snap_caps = CEPH_CAP_PIN; /* so we can open */ |
85 | ci->i_rbytes = 0; | |
355da1eb SW |
86 | return inode; |
87 | } | |
88 | ||
89 | const struct inode_operations ceph_file_iops = { | |
90 | .permission = ceph_permission, | |
91 | .setattr = ceph_setattr, | |
92 | .getattr = ceph_getattr, | |
93 | .setxattr = ceph_setxattr, | |
94 | .getxattr = ceph_getxattr, | |
95 | .listxattr = ceph_listxattr, | |
96 | .removexattr = ceph_removexattr, | |
97 | }; | |
98 | ||
99 | ||
100 | /* | |
101 | * We use a 'frag tree' to keep track of the MDS's directory fragments | |
102 | * for a given inode (usually there is just a single fragment). We | |
103 | * need to know when a child frag is delegated to a new MDS, or when | |
104 | * it is flagged as replicated, so we can direct our requests | |
105 | * accordingly. | |
106 | */ | |
107 | ||
108 | /* | |
109 | * find/create a frag in the tree | |
110 | */ | |
111 | static struct ceph_inode_frag *__get_or_create_frag(struct ceph_inode_info *ci, | |
112 | u32 f) | |
113 | { | |
114 | struct rb_node **p; | |
115 | struct rb_node *parent = NULL; | |
116 | struct ceph_inode_frag *frag; | |
117 | int c; | |
118 | ||
119 | p = &ci->i_fragtree.rb_node; | |
120 | while (*p) { | |
121 | parent = *p; | |
122 | frag = rb_entry(parent, struct ceph_inode_frag, node); | |
123 | c = ceph_frag_compare(f, frag->frag); | |
124 | if (c < 0) | |
125 | p = &(*p)->rb_left; | |
126 | else if (c > 0) | |
127 | p = &(*p)->rb_right; | |
128 | else | |
129 | return frag; | |
130 | } | |
131 | ||
132 | frag = kmalloc(sizeof(*frag), GFP_NOFS); | |
133 | if (!frag) { | |
134 | pr_err("__get_or_create_frag ENOMEM on %p %llx.%llx " | |
135 | "frag %x\n", &ci->vfs_inode, | |
136 | ceph_vinop(&ci->vfs_inode), f); | |
137 | return ERR_PTR(-ENOMEM); | |
138 | } | |
139 | frag->frag = f; | |
140 | frag->split_by = 0; | |
141 | frag->mds = -1; | |
142 | frag->ndist = 0; | |
143 | ||
144 | rb_link_node(&frag->node, parent, p); | |
145 | rb_insert_color(&frag->node, &ci->i_fragtree); | |
146 | ||
147 | dout("get_or_create_frag added %llx.%llx frag %x\n", | |
148 | ceph_vinop(&ci->vfs_inode), f); | |
149 | return frag; | |
150 | } | |
151 | ||
152 | /* | |
153 | * find a specific frag @f | |
154 | */ | |
155 | struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci, u32 f) | |
156 | { | |
157 | struct rb_node *n = ci->i_fragtree.rb_node; | |
158 | ||
159 | while (n) { | |
160 | struct ceph_inode_frag *frag = | |
161 | rb_entry(n, struct ceph_inode_frag, node); | |
162 | int c = ceph_frag_compare(f, frag->frag); | |
163 | if (c < 0) | |
164 | n = n->rb_left; | |
165 | else if (c > 0) | |
166 | n = n->rb_right; | |
167 | else | |
168 | return frag; | |
169 | } | |
170 | return NULL; | |
171 | } | |
172 | ||
173 | /* | |
174 | * Choose frag containing the given value @v. If @pfrag is | |
175 | * specified, copy the frag delegation info to the caller if | |
176 | * it is present. | |
177 | */ | |
178 | u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v, | |
179 | struct ceph_inode_frag *pfrag, | |
180 | int *found) | |
181 | { | |
182 | u32 t = ceph_frag_make(0, 0); | |
183 | struct ceph_inode_frag *frag; | |
184 | unsigned nway, i; | |
185 | u32 n; | |
186 | ||
187 | if (found) | |
188 | *found = 0; | |
189 | ||
190 | mutex_lock(&ci->i_fragtree_mutex); | |
191 | while (1) { | |
192 | WARN_ON(!ceph_frag_contains_value(t, v)); | |
193 | frag = __ceph_find_frag(ci, t); | |
194 | if (!frag) | |
195 | break; /* t is a leaf */ | |
196 | if (frag->split_by == 0) { | |
197 | if (pfrag) | |
198 | memcpy(pfrag, frag, sizeof(*pfrag)); | |
199 | if (found) | |
200 | *found = 1; | |
201 | break; | |
202 | } | |
203 | ||
204 | /* choose child */ | |
205 | nway = 1 << frag->split_by; | |
206 | dout("choose_frag(%x) %x splits by %d (%d ways)\n", v, t, | |
207 | frag->split_by, nway); | |
208 | for (i = 0; i < nway; i++) { | |
209 | n = ceph_frag_make_child(t, frag->split_by, i); | |
210 | if (ceph_frag_contains_value(n, v)) { | |
211 | t = n; | |
212 | break; | |
213 | } | |
214 | } | |
215 | BUG_ON(i == nway); | |
216 | } | |
217 | dout("choose_frag(%x) = %x\n", v, t); | |
218 | ||
219 | mutex_unlock(&ci->i_fragtree_mutex); | |
220 | return t; | |
221 | } | |
222 | ||
223 | /* | |
224 | * Process dirfrag (delegation) info from the mds. Include leaf | |
225 | * fragment in tree ONLY if ndist > 0. Otherwise, only | |
226 | * branches/splits are included in i_fragtree) | |
227 | */ | |
228 | static int ceph_fill_dirfrag(struct inode *inode, | |
229 | struct ceph_mds_reply_dirfrag *dirinfo) | |
230 | { | |
231 | struct ceph_inode_info *ci = ceph_inode(inode); | |
232 | struct ceph_inode_frag *frag; | |
233 | u32 id = le32_to_cpu(dirinfo->frag); | |
234 | int mds = le32_to_cpu(dirinfo->auth); | |
235 | int ndist = le32_to_cpu(dirinfo->ndist); | |
236 | int i; | |
237 | int err = 0; | |
238 | ||
239 | mutex_lock(&ci->i_fragtree_mutex); | |
240 | if (ndist == 0) { | |
241 | /* no delegation info needed. */ | |
242 | frag = __ceph_find_frag(ci, id); | |
243 | if (!frag) | |
244 | goto out; | |
245 | if (frag->split_by == 0) { | |
246 | /* tree leaf, remove */ | |
247 | dout("fill_dirfrag removed %llx.%llx frag %x" | |
248 | " (no ref)\n", ceph_vinop(inode), id); | |
249 | rb_erase(&frag->node, &ci->i_fragtree); | |
250 | kfree(frag); | |
251 | } else { | |
252 | /* tree branch, keep and clear */ | |
253 | dout("fill_dirfrag cleared %llx.%llx frag %x" | |
254 | " referral\n", ceph_vinop(inode), id); | |
255 | frag->mds = -1; | |
256 | frag->ndist = 0; | |
257 | } | |
258 | goto out; | |
259 | } | |
260 | ||
261 | ||
262 | /* find/add this frag to store mds delegation info */ | |
263 | frag = __get_or_create_frag(ci, id); | |
264 | if (IS_ERR(frag)) { | |
265 | /* this is not the end of the world; we can continue | |
266 | with bad/inaccurate delegation info */ | |
267 | pr_err("fill_dirfrag ENOMEM on mds ref %llx.%llx fg %x\n", | |
268 | ceph_vinop(inode), le32_to_cpu(dirinfo->frag)); | |
269 | err = -ENOMEM; | |
270 | goto out; | |
271 | } | |
272 | ||
273 | frag->mds = mds; | |
274 | frag->ndist = min_t(u32, ndist, CEPH_MAX_DIRFRAG_REP); | |
275 | for (i = 0; i < frag->ndist; i++) | |
276 | frag->dist[i] = le32_to_cpu(dirinfo->dist[i]); | |
277 | dout("fill_dirfrag %llx.%llx frag %x ndist=%d\n", | |
278 | ceph_vinop(inode), frag->frag, frag->ndist); | |
279 | ||
280 | out: | |
281 | mutex_unlock(&ci->i_fragtree_mutex); | |
282 | return err; | |
283 | } | |
284 | ||
285 | ||
286 | /* | |
287 | * initialize a newly allocated inode. | |
288 | */ | |
289 | struct inode *ceph_alloc_inode(struct super_block *sb) | |
290 | { | |
291 | struct ceph_inode_info *ci; | |
292 | int i; | |
293 | ||
294 | ci = kmem_cache_alloc(ceph_inode_cachep, GFP_NOFS); | |
295 | if (!ci) | |
296 | return NULL; | |
297 | ||
298 | dout("alloc_inode %p\n", &ci->vfs_inode); | |
299 | ||
300 | ci->i_version = 0; | |
301 | ci->i_time_warp_seq = 0; | |
302 | ci->i_ceph_flags = 0; | |
303 | ci->i_release_count = 0; | |
304 | ci->i_symlink = NULL; | |
305 | ||
6c0f3af7 SW |
306 | memset(&ci->i_dir_layout, 0, sizeof(ci->i_dir_layout)); |
307 | ||
355da1eb SW |
308 | ci->i_fragtree = RB_ROOT; |
309 | mutex_init(&ci->i_fragtree_mutex); | |
310 | ||
311 | ci->i_xattrs.blob = NULL; | |
312 | ci->i_xattrs.prealloc_blob = NULL; | |
313 | ci->i_xattrs.dirty = false; | |
314 | ci->i_xattrs.index = RB_ROOT; | |
315 | ci->i_xattrs.count = 0; | |
316 | ci->i_xattrs.names_size = 0; | |
317 | ci->i_xattrs.vals_size = 0; | |
318 | ci->i_xattrs.version = 0; | |
319 | ci->i_xattrs.index_version = 0; | |
320 | ||
321 | ci->i_caps = RB_ROOT; | |
322 | ci->i_auth_cap = NULL; | |
323 | ci->i_dirty_caps = 0; | |
324 | ci->i_flushing_caps = 0; | |
325 | INIT_LIST_HEAD(&ci->i_dirty_item); | |
326 | INIT_LIST_HEAD(&ci->i_flushing_item); | |
327 | ci->i_cap_flush_seq = 0; | |
328 | ci->i_cap_flush_last_tid = 0; | |
329 | memset(&ci->i_cap_flush_tid, 0, sizeof(ci->i_cap_flush_tid)); | |
330 | init_waitqueue_head(&ci->i_cap_wq); | |
331 | ci->i_hold_caps_min = 0; | |
332 | ci->i_hold_caps_max = 0; | |
333 | INIT_LIST_HEAD(&ci->i_cap_delay_list); | |
334 | ci->i_cap_exporting_mds = 0; | |
335 | ci->i_cap_exporting_mseq = 0; | |
336 | ci->i_cap_exporting_issued = 0; | |
337 | INIT_LIST_HEAD(&ci->i_cap_snaps); | |
338 | ci->i_head_snapc = NULL; | |
339 | ci->i_snap_caps = 0; | |
340 | ||
341 | for (i = 0; i < CEPH_FILE_MODE_NUM; i++) | |
342 | ci->i_nr_by_mode[i] = 0; | |
343 | ||
344 | ci->i_truncate_seq = 0; | |
345 | ci->i_truncate_size = 0; | |
346 | ci->i_truncate_pending = 0; | |
347 | ||
348 | ci->i_max_size = 0; | |
349 | ci->i_reported_size = 0; | |
350 | ci->i_wanted_max_size = 0; | |
351 | ci->i_requested_max_size = 0; | |
352 | ||
353 | ci->i_pin_ref = 0; | |
354 | ci->i_rd_ref = 0; | |
355 | ci->i_rdcache_ref = 0; | |
356 | ci->i_wr_ref = 0; | |
d3d0720d | 357 | ci->i_wb_ref = 0; |
355da1eb SW |
358 | ci->i_wrbuffer_ref = 0; |
359 | ci->i_wrbuffer_ref_head = 0; | |
360 | ci->i_shared_gen = 0; | |
361 | ci->i_rdcache_gen = 0; | |
362 | ci->i_rdcache_revoking = 0; | |
363 | ||
364 | INIT_LIST_HEAD(&ci->i_unsafe_writes); | |
365 | INIT_LIST_HEAD(&ci->i_unsafe_dirops); | |
366 | spin_lock_init(&ci->i_unsafe_lock); | |
367 | ||
368 | ci->i_snap_realm = NULL; | |
369 | INIT_LIST_HEAD(&ci->i_snap_realm_item); | |
370 | INIT_LIST_HEAD(&ci->i_snap_flush_item); | |
371 | ||
3c6f6b79 SW |
372 | INIT_WORK(&ci->i_wb_work, ceph_writeback_work); |
373 | INIT_WORK(&ci->i_pg_inv_work, ceph_invalidate_work); | |
355da1eb SW |
374 | |
375 | INIT_WORK(&ci->i_vmtruncate_work, ceph_vmtruncate_work); | |
376 | ||
377 | return &ci->vfs_inode; | |
378 | } | |
379 | ||
fa0d7e3d NP |
380 | static void ceph_i_callback(struct rcu_head *head) |
381 | { | |
382 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
383 | struct ceph_inode_info *ci = ceph_inode(inode); | |
384 | ||
385 | INIT_LIST_HEAD(&inode->i_dentry); | |
386 | kmem_cache_free(ceph_inode_cachep, ci); | |
387 | } | |
388 | ||
355da1eb SW |
389 | void ceph_destroy_inode(struct inode *inode) |
390 | { | |
391 | struct ceph_inode_info *ci = ceph_inode(inode); | |
392 | struct ceph_inode_frag *frag; | |
393 | struct rb_node *n; | |
394 | ||
395 | dout("destroy_inode %p ino %llx.%llx\n", inode, ceph_vinop(inode)); | |
396 | ||
397 | ceph_queue_caps_release(inode); | |
398 | ||
8b218b8a SW |
399 | /* |
400 | * we may still have a snap_realm reference if there are stray | |
401 | * caps in i_cap_exporting_issued or i_snap_caps. | |
402 | */ | |
403 | if (ci->i_snap_realm) { | |
404 | struct ceph_mds_client *mdsc = | |
3d14c5d2 | 405 | ceph_sb_to_client(ci->vfs_inode.i_sb)->mdsc; |
8b218b8a SW |
406 | struct ceph_snap_realm *realm = ci->i_snap_realm; |
407 | ||
408 | dout(" dropping residual ref to snap realm %p\n", realm); | |
409 | spin_lock(&realm->inodes_with_caps_lock); | |
410 | list_del_init(&ci->i_snap_realm_item); | |
411 | spin_unlock(&realm->inodes_with_caps_lock); | |
412 | ceph_put_snap_realm(mdsc, realm); | |
413 | } | |
414 | ||
355da1eb SW |
415 | kfree(ci->i_symlink); |
416 | while ((n = rb_first(&ci->i_fragtree)) != NULL) { | |
417 | frag = rb_entry(n, struct ceph_inode_frag, node); | |
418 | rb_erase(n, &ci->i_fragtree); | |
419 | kfree(frag); | |
420 | } | |
421 | ||
422 | __ceph_destroy_xattrs(ci); | |
b6c1d5b8 SW |
423 | if (ci->i_xattrs.blob) |
424 | ceph_buffer_put(ci->i_xattrs.blob); | |
425 | if (ci->i_xattrs.prealloc_blob) | |
426 | ceph_buffer_put(ci->i_xattrs.prealloc_blob); | |
355da1eb | 427 | |
fa0d7e3d | 428 | call_rcu(&inode->i_rcu, ceph_i_callback); |
355da1eb SW |
429 | } |
430 | ||
431 | ||
432 | /* | |
433 | * Helpers to fill in size, ctime, mtime, and atime. We have to be | |
434 | * careful because either the client or MDS may have more up to date | |
435 | * info, depending on which capabilities are held, and whether | |
436 | * time_warp_seq or truncate_seq have increased. (Ordinarily, mtime | |
437 | * and size are monotonically increasing, except when utimes() or | |
438 | * truncate() increments the corresponding _seq values.) | |
439 | */ | |
440 | int ceph_fill_file_size(struct inode *inode, int issued, | |
441 | u32 truncate_seq, u64 truncate_size, u64 size) | |
442 | { | |
443 | struct ceph_inode_info *ci = ceph_inode(inode); | |
444 | int queue_trunc = 0; | |
445 | ||
446 | if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) > 0 || | |
447 | (truncate_seq == ci->i_truncate_seq && size > inode->i_size)) { | |
448 | dout("size %lld -> %llu\n", inode->i_size, size); | |
449 | inode->i_size = size; | |
450 | inode->i_blocks = (size + (1<<9) - 1) >> 9; | |
451 | ci->i_reported_size = size; | |
452 | if (truncate_seq != ci->i_truncate_seq) { | |
453 | dout("truncate_seq %u -> %u\n", | |
454 | ci->i_truncate_seq, truncate_seq); | |
455 | ci->i_truncate_seq = truncate_seq; | |
3d497d85 YS |
456 | /* |
457 | * If we hold relevant caps, or in the case where we're | |
458 | * not the only client referencing this file and we | |
459 | * don't hold those caps, then we need to check whether | |
460 | * the file is either opened or mmaped | |
461 | */ | |
462 | if ((issued & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_RD| | |
2962507c SW |
463 | CEPH_CAP_FILE_WR|CEPH_CAP_FILE_BUFFER| |
464 | CEPH_CAP_FILE_EXCL| | |
465 | CEPH_CAP_FILE_LAZYIO)) || | |
3d497d85 YS |
466 | mapping_mapped(inode->i_mapping) || |
467 | __ceph_caps_file_wanted(ci)) { | |
355da1eb SW |
468 | ci->i_truncate_pending++; |
469 | queue_trunc = 1; | |
470 | } | |
471 | } | |
472 | } | |
473 | if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) >= 0 && | |
474 | ci->i_truncate_size != truncate_size) { | |
475 | dout("truncate_size %lld -> %llu\n", ci->i_truncate_size, | |
476 | truncate_size); | |
477 | ci->i_truncate_size = truncate_size; | |
478 | } | |
479 | return queue_trunc; | |
480 | } | |
481 | ||
482 | void ceph_fill_file_time(struct inode *inode, int issued, | |
483 | u64 time_warp_seq, struct timespec *ctime, | |
484 | struct timespec *mtime, struct timespec *atime) | |
485 | { | |
486 | struct ceph_inode_info *ci = ceph_inode(inode); | |
487 | int warn = 0; | |
488 | ||
489 | if (issued & (CEPH_CAP_FILE_EXCL| | |
490 | CEPH_CAP_FILE_WR| | |
d8672d64 SW |
491 | CEPH_CAP_FILE_BUFFER| |
492 | CEPH_CAP_AUTH_EXCL| | |
493 | CEPH_CAP_XATTR_EXCL)) { | |
355da1eb SW |
494 | if (timespec_compare(ctime, &inode->i_ctime) > 0) { |
495 | dout("ctime %ld.%09ld -> %ld.%09ld inc w/ cap\n", | |
496 | inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec, | |
497 | ctime->tv_sec, ctime->tv_nsec); | |
498 | inode->i_ctime = *ctime; | |
499 | } | |
500 | if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) > 0) { | |
501 | /* the MDS did a utimes() */ | |
502 | dout("mtime %ld.%09ld -> %ld.%09ld " | |
503 | "tw %d -> %d\n", | |
504 | inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec, | |
505 | mtime->tv_sec, mtime->tv_nsec, | |
506 | ci->i_time_warp_seq, (int)time_warp_seq); | |
507 | ||
508 | inode->i_mtime = *mtime; | |
509 | inode->i_atime = *atime; | |
510 | ci->i_time_warp_seq = time_warp_seq; | |
511 | } else if (time_warp_seq == ci->i_time_warp_seq) { | |
512 | /* nobody did utimes(); take the max */ | |
513 | if (timespec_compare(mtime, &inode->i_mtime) > 0) { | |
514 | dout("mtime %ld.%09ld -> %ld.%09ld inc\n", | |
515 | inode->i_mtime.tv_sec, | |
516 | inode->i_mtime.tv_nsec, | |
517 | mtime->tv_sec, mtime->tv_nsec); | |
518 | inode->i_mtime = *mtime; | |
519 | } | |
520 | if (timespec_compare(atime, &inode->i_atime) > 0) { | |
521 | dout("atime %ld.%09ld -> %ld.%09ld inc\n", | |
522 | inode->i_atime.tv_sec, | |
523 | inode->i_atime.tv_nsec, | |
524 | atime->tv_sec, atime->tv_nsec); | |
525 | inode->i_atime = *atime; | |
526 | } | |
527 | } else if (issued & CEPH_CAP_FILE_EXCL) { | |
528 | /* we did a utimes(); ignore mds values */ | |
529 | } else { | |
530 | warn = 1; | |
531 | } | |
532 | } else { | |
d8672d64 | 533 | /* we have no write|excl caps; whatever the MDS says is true */ |
355da1eb SW |
534 | if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) >= 0) { |
535 | inode->i_ctime = *ctime; | |
536 | inode->i_mtime = *mtime; | |
537 | inode->i_atime = *atime; | |
538 | ci->i_time_warp_seq = time_warp_seq; | |
539 | } else { | |
540 | warn = 1; | |
541 | } | |
542 | } | |
543 | if (warn) /* time_warp_seq shouldn't go backwards */ | |
544 | dout("%p mds time_warp_seq %llu < %u\n", | |
545 | inode, time_warp_seq, ci->i_time_warp_seq); | |
546 | } | |
547 | ||
548 | /* | |
549 | * Populate an inode based on info from mds. May be called on new or | |
550 | * existing inodes. | |
551 | */ | |
552 | static int fill_inode(struct inode *inode, | |
553 | struct ceph_mds_reply_info_in *iinfo, | |
554 | struct ceph_mds_reply_dirfrag *dirinfo, | |
555 | struct ceph_mds_session *session, | |
556 | unsigned long ttl_from, int cap_fmode, | |
557 | struct ceph_cap_reservation *caps_reservation) | |
558 | { | |
559 | struct ceph_mds_reply_inode *info = iinfo->in; | |
560 | struct ceph_inode_info *ci = ceph_inode(inode); | |
561 | int i; | |
dfabbed6 SW |
562 | int issued = 0, implemented; |
563 | int updating_inode = 0; | |
355da1eb SW |
564 | struct timespec mtime, atime, ctime; |
565 | u32 nsplits; | |
566 | struct ceph_buffer *xattr_blob = NULL; | |
567 | int err = 0; | |
568 | int queue_trunc = 0; | |
569 | ||
570 | dout("fill_inode %p ino %llx.%llx v %llu had %llu\n", | |
571 | inode, ceph_vinop(inode), le64_to_cpu(info->version), | |
572 | ci->i_version); | |
573 | ||
574 | /* | |
575 | * prealloc xattr data, if it looks like we'll need it. only | |
576 | * if len > 4 (meaning there are actually xattrs; the first 4 | |
577 | * bytes are the xattr count). | |
578 | */ | |
579 | if (iinfo->xattr_len > 4) { | |
b6c1d5b8 | 580 | xattr_blob = ceph_buffer_new(iinfo->xattr_len, GFP_NOFS); |
355da1eb SW |
581 | if (!xattr_blob) |
582 | pr_err("fill_inode ENOMEM xattr blob %d bytes\n", | |
583 | iinfo->xattr_len); | |
584 | } | |
585 | ||
586 | spin_lock(&inode->i_lock); | |
587 | ||
588 | /* | |
589 | * provided version will be odd if inode value is projected, | |
8bd59e01 SW |
590 | * even if stable. skip the update if we have newer stable |
591 | * info (ours>=theirs, e.g. due to racing mds replies), unless | |
592 | * we are getting projected (unstable) info (in which case the | |
593 | * version is odd, and we want ours>theirs). | |
594 | * us them | |
595 | * 2 2 skip | |
596 | * 3 2 skip | |
597 | * 3 3 update | |
355da1eb SW |
598 | */ |
599 | if (le64_to_cpu(info->version) > 0 && | |
8bd59e01 | 600 | (ci->i_version & ~1) >= le64_to_cpu(info->version)) |
355da1eb | 601 | goto no_change; |
dfabbed6 SW |
602 | |
603 | updating_inode = 1; | |
355da1eb SW |
604 | issued = __ceph_caps_issued(ci, &implemented); |
605 | issued |= implemented | __ceph_caps_dirty(ci); | |
606 | ||
607 | /* update inode */ | |
608 | ci->i_version = le64_to_cpu(info->version); | |
609 | inode->i_version++; | |
610 | inode->i_rdev = le32_to_cpu(info->rdev); | |
611 | ||
612 | if ((issued & CEPH_CAP_AUTH_EXCL) == 0) { | |
613 | inode->i_mode = le32_to_cpu(info->mode); | |
614 | inode->i_uid = le32_to_cpu(info->uid); | |
615 | inode->i_gid = le32_to_cpu(info->gid); | |
616 | dout("%p mode 0%o uid.gid %d.%d\n", inode, inode->i_mode, | |
617 | inode->i_uid, inode->i_gid); | |
618 | } | |
619 | ||
620 | if ((issued & CEPH_CAP_LINK_EXCL) == 0) | |
bfe86848 | 621 | set_nlink(inode, le32_to_cpu(info->nlink)); |
355da1eb SW |
622 | |
623 | /* be careful with mtime, atime, size */ | |
624 | ceph_decode_timespec(&atime, &info->atime); | |
625 | ceph_decode_timespec(&mtime, &info->mtime); | |
626 | ceph_decode_timespec(&ctime, &info->ctime); | |
627 | queue_trunc = ceph_fill_file_size(inode, issued, | |
628 | le32_to_cpu(info->truncate_seq), | |
629 | le64_to_cpu(info->truncate_size), | |
355da1eb SW |
630 | le64_to_cpu(info->size)); |
631 | ceph_fill_file_time(inode, issued, | |
632 | le32_to_cpu(info->time_warp_seq), | |
633 | &ctime, &mtime, &atime); | |
634 | ||
912a9b03 SW |
635 | /* only update max_size on auth cap */ |
636 | if ((info->cap.flags & CEPH_CAP_FLAG_AUTH) && | |
637 | ci->i_max_size != le64_to_cpu(info->max_size)) { | |
638 | dout("max_size %lld -> %llu\n", ci->i_max_size, | |
639 | le64_to_cpu(info->max_size)); | |
640 | ci->i_max_size = le64_to_cpu(info->max_size); | |
641 | } | |
642 | ||
355da1eb SW |
643 | ci->i_layout = info->layout; |
644 | inode->i_blkbits = fls(le32_to_cpu(info->layout.fl_stripe_unit)) - 1; | |
645 | ||
646 | /* xattrs */ | |
647 | /* note that if i_xattrs.len <= 4, i_xattrs.data will still be NULL. */ | |
648 | if ((issued & CEPH_CAP_XATTR_EXCL) == 0 && | |
649 | le64_to_cpu(info->xattr_version) > ci->i_xattrs.version) { | |
650 | if (ci->i_xattrs.blob) | |
651 | ceph_buffer_put(ci->i_xattrs.blob); | |
652 | ci->i_xattrs.blob = xattr_blob; | |
653 | if (xattr_blob) | |
654 | memcpy(ci->i_xattrs.blob->vec.iov_base, | |
655 | iinfo->xattr_data, iinfo->xattr_len); | |
656 | ci->i_xattrs.version = le64_to_cpu(info->xattr_version); | |
a6424e48 | 657 | xattr_blob = NULL; |
355da1eb SW |
658 | } |
659 | ||
660 | inode->i_mapping->a_ops = &ceph_aops; | |
661 | inode->i_mapping->backing_dev_info = | |
640ef79d | 662 | &ceph_sb_to_client(inode->i_sb)->backing_dev_info; |
355da1eb SW |
663 | |
664 | switch (inode->i_mode & S_IFMT) { | |
665 | case S_IFIFO: | |
666 | case S_IFBLK: | |
667 | case S_IFCHR: | |
668 | case S_IFSOCK: | |
669 | init_special_inode(inode, inode->i_mode, inode->i_rdev); | |
670 | inode->i_op = &ceph_file_iops; | |
671 | break; | |
672 | case S_IFREG: | |
673 | inode->i_op = &ceph_file_iops; | |
674 | inode->i_fop = &ceph_file_fops; | |
675 | break; | |
676 | case S_IFLNK: | |
677 | inode->i_op = &ceph_symlink_iops; | |
678 | if (!ci->i_symlink) { | |
679 | int symlen = iinfo->symlink_len; | |
680 | char *sym; | |
681 | ||
682 | BUG_ON(symlen != inode->i_size); | |
683 | spin_unlock(&inode->i_lock); | |
684 | ||
685 | err = -ENOMEM; | |
686 | sym = kmalloc(symlen+1, GFP_NOFS); | |
687 | if (!sym) | |
688 | goto out; | |
689 | memcpy(sym, iinfo->symlink, symlen); | |
690 | sym[symlen] = 0; | |
691 | ||
692 | spin_lock(&inode->i_lock); | |
693 | if (!ci->i_symlink) | |
694 | ci->i_symlink = sym; | |
695 | else | |
696 | kfree(sym); /* lost a race */ | |
697 | } | |
698 | break; | |
699 | case S_IFDIR: | |
700 | inode->i_op = &ceph_dir_iops; | |
701 | inode->i_fop = &ceph_dir_fops; | |
702 | ||
14303d20 SW |
703 | ci->i_dir_layout = iinfo->dir_layout; |
704 | ||
355da1eb SW |
705 | ci->i_files = le64_to_cpu(info->files); |
706 | ci->i_subdirs = le64_to_cpu(info->subdirs); | |
707 | ci->i_rbytes = le64_to_cpu(info->rbytes); | |
708 | ci->i_rfiles = le64_to_cpu(info->rfiles); | |
709 | ci->i_rsubdirs = le64_to_cpu(info->rsubdirs); | |
710 | ceph_decode_timespec(&ci->i_rctime, &info->rctime); | |
355da1eb SW |
711 | break; |
712 | default: | |
713 | pr_err("fill_inode %llx.%llx BAD mode 0%o\n", | |
714 | ceph_vinop(inode), inode->i_mode); | |
715 | } | |
716 | ||
717 | no_change: | |
718 | spin_unlock(&inode->i_lock); | |
719 | ||
720 | /* queue truncate if we saw i_size decrease */ | |
721 | if (queue_trunc) | |
3c6f6b79 | 722 | ceph_queue_vmtruncate(inode); |
355da1eb SW |
723 | |
724 | /* populate frag tree */ | |
725 | /* FIXME: move me up, if/when version reflects fragtree changes */ | |
726 | nsplits = le32_to_cpu(info->fragtree.nsplits); | |
727 | mutex_lock(&ci->i_fragtree_mutex); | |
728 | for (i = 0; i < nsplits; i++) { | |
729 | u32 id = le32_to_cpu(info->fragtree.splits[i].frag); | |
730 | struct ceph_inode_frag *frag = __get_or_create_frag(ci, id); | |
731 | ||
732 | if (IS_ERR(frag)) | |
733 | continue; | |
734 | frag->split_by = le32_to_cpu(info->fragtree.splits[i].by); | |
735 | dout(" frag %x split by %d\n", frag->frag, frag->split_by); | |
736 | } | |
737 | mutex_unlock(&ci->i_fragtree_mutex); | |
738 | ||
739 | /* were we issued a capability? */ | |
740 | if (info->cap.caps) { | |
741 | if (ceph_snap(inode) == CEPH_NOSNAP) { | |
742 | ceph_add_cap(inode, session, | |
743 | le64_to_cpu(info->cap.cap_id), | |
744 | cap_fmode, | |
745 | le32_to_cpu(info->cap.caps), | |
746 | le32_to_cpu(info->cap.wanted), | |
747 | le32_to_cpu(info->cap.seq), | |
748 | le32_to_cpu(info->cap.mseq), | |
749 | le64_to_cpu(info->cap.realm), | |
750 | info->cap.flags, | |
751 | caps_reservation); | |
752 | } else { | |
753 | spin_lock(&inode->i_lock); | |
754 | dout(" %p got snap_caps %s\n", inode, | |
755 | ceph_cap_string(le32_to_cpu(info->cap.caps))); | |
756 | ci->i_snap_caps |= le32_to_cpu(info->cap.caps); | |
757 | if (cap_fmode >= 0) | |
758 | __ceph_get_fmode(ci, cap_fmode); | |
759 | spin_unlock(&inode->i_lock); | |
760 | } | |
04d000eb SW |
761 | } else if (cap_fmode >= 0) { |
762 | pr_warning("mds issued no caps on %llx.%llx\n", | |
763 | ceph_vinop(inode)); | |
764 | __ceph_get_fmode(ci, cap_fmode); | |
355da1eb SW |
765 | } |
766 | ||
dfabbed6 SW |
767 | /* set dir completion flag? */ |
768 | if (S_ISDIR(inode->i_mode) && | |
769 | updating_inode && /* didn't jump to no_change */ | |
770 | ci->i_files == 0 && ci->i_subdirs == 0 && | |
771 | ceph_snap(inode) == CEPH_NOSNAP && | |
772 | (le32_to_cpu(info->cap.caps) & CEPH_CAP_FILE_SHARED) && | |
773 | (issued & CEPH_CAP_FILE_EXCL) == 0 && | |
c6ffe100 | 774 | !ceph_dir_test_complete(inode)) { |
dfabbed6 | 775 | dout(" marking %p complete (empty)\n", inode); |
c6ffe100 | 776 | ceph_dir_set_complete(inode); |
dfabbed6 SW |
777 | ci->i_max_offset = 2; |
778 | } | |
779 | ||
355da1eb SW |
780 | /* update delegation info? */ |
781 | if (dirinfo) | |
782 | ceph_fill_dirfrag(inode, dirinfo); | |
783 | ||
784 | err = 0; | |
785 | ||
786 | out: | |
b6c1d5b8 SW |
787 | if (xattr_blob) |
788 | ceph_buffer_put(xattr_blob); | |
355da1eb SW |
789 | return err; |
790 | } | |
791 | ||
792 | /* | |
793 | * caller should hold session s_mutex. | |
794 | */ | |
795 | static void update_dentry_lease(struct dentry *dentry, | |
796 | struct ceph_mds_reply_lease *lease, | |
797 | struct ceph_mds_session *session, | |
798 | unsigned long from_time) | |
799 | { | |
800 | struct ceph_dentry_info *di = ceph_dentry(dentry); | |
801 | long unsigned duration = le32_to_cpu(lease->duration_ms); | |
802 | long unsigned ttl = from_time + (duration * HZ) / 1000; | |
803 | long unsigned half_ttl = from_time + (duration * HZ / 2) / 1000; | |
804 | struct inode *dir; | |
805 | ||
806 | /* only track leases on regular dentries */ | |
807 | if (dentry->d_op != &ceph_dentry_ops) | |
808 | return; | |
809 | ||
810 | spin_lock(&dentry->d_lock); | |
2f90b852 SW |
811 | dout("update_dentry_lease %p duration %lu ms ttl %lu\n", |
812 | dentry, duration, ttl); | |
355da1eb SW |
813 | |
814 | /* make lease_rdcache_gen match directory */ | |
815 | dir = dentry->d_parent->d_inode; | |
816 | di->lease_shared_gen = ceph_inode(dir)->i_shared_gen; | |
817 | ||
2f90b852 | 818 | if (duration == 0) |
355da1eb SW |
819 | goto out_unlock; |
820 | ||
821 | if (di->lease_gen == session->s_cap_gen && | |
822 | time_before(ttl, dentry->d_time)) | |
823 | goto out_unlock; /* we already have a newer lease. */ | |
824 | ||
825 | if (di->lease_session && di->lease_session != session) | |
826 | goto out_unlock; | |
827 | ||
828 | ceph_dentry_lru_touch(dentry); | |
829 | ||
830 | if (!di->lease_session) | |
831 | di->lease_session = ceph_get_mds_session(session); | |
832 | di->lease_gen = session->s_cap_gen; | |
833 | di->lease_seq = le32_to_cpu(lease->seq); | |
834 | di->lease_renew_after = half_ttl; | |
835 | di->lease_renew_from = 0; | |
836 | dentry->d_time = ttl; | |
837 | out_unlock: | |
838 | spin_unlock(&dentry->d_lock); | |
839 | return; | |
840 | } | |
841 | ||
1cd3935b SW |
842 | /* |
843 | * Set dentry's directory position based on the current dir's max, and | |
844 | * order it in d_subdirs, so that dcache_readdir behaves. | |
4f177264 SW |
845 | * |
846 | * Always called under directory's i_mutex. | |
1cd3935b SW |
847 | */ |
848 | static void ceph_set_dentry_offset(struct dentry *dn) | |
849 | { | |
850 | struct dentry *dir = dn->d_parent; | |
4f177264 | 851 | struct inode *inode = dir->d_inode; |
1cd3935b SW |
852 | struct ceph_dentry_info *di; |
853 | ||
854 | BUG_ON(!inode); | |
855 | ||
856 | di = ceph_dentry(dn); | |
857 | ||
858 | spin_lock(&inode->i_lock); | |
c6ffe100 | 859 | if (!ceph_dir_test_complete(inode)) { |
1cd3935b SW |
860 | spin_unlock(&inode->i_lock); |
861 | return; | |
862 | } | |
863 | di->offset = ceph_inode(inode)->i_max_offset++; | |
864 | spin_unlock(&inode->i_lock); | |
865 | ||
2fd6b7f5 NP |
866 | spin_lock(&dir->d_lock); |
867 | spin_lock_nested(&dn->d_lock, DENTRY_D_LOCK_NESTED); | |
13a4214c | 868 | list_move(&dn->d_u.d_child, &dir->d_subdirs); |
1cd3935b SW |
869 | dout("set_dentry_offset %p %lld (%p %p)\n", dn, di->offset, |
870 | dn->d_u.d_child.prev, dn->d_u.d_child.next); | |
871 | spin_unlock(&dn->d_lock); | |
2fd6b7f5 | 872 | spin_unlock(&dir->d_lock); |
1cd3935b SW |
873 | } |
874 | ||
355da1eb SW |
875 | /* |
876 | * splice a dentry to an inode. | |
877 | * caller must hold directory i_mutex for this to be safe. | |
878 | * | |
879 | * we will only rehash the resulting dentry if @prehash is | |
880 | * true; @prehash will be set to false (for the benefit of | |
881 | * the caller) if we fail. | |
882 | */ | |
883 | static struct dentry *splice_dentry(struct dentry *dn, struct inode *in, | |
467c5251 | 884 | bool *prehash, bool set_offset) |
355da1eb SW |
885 | { |
886 | struct dentry *realdn; | |
887 | ||
1cd3935b SW |
888 | BUG_ON(dn->d_inode); |
889 | ||
355da1eb SW |
890 | /* dn must be unhashed */ |
891 | if (!d_unhashed(dn)) | |
892 | d_drop(dn); | |
893 | realdn = d_materialise_unique(dn, in); | |
894 | if (IS_ERR(realdn)) { | |
d69ed05a SW |
895 | pr_err("splice_dentry error %ld %p inode %p ino %llx.%llx\n", |
896 | PTR_ERR(realdn), dn, in, ceph_vinop(in)); | |
355da1eb SW |
897 | if (prehash) |
898 | *prehash = false; /* don't rehash on error */ | |
899 | dn = realdn; /* note realdn contains the error */ | |
900 | goto out; | |
901 | } else if (realdn) { | |
902 | dout("dn %p (%d) spliced with %p (%d) " | |
903 | "inode %p ino %llx.%llx\n", | |
b7ab39f6 NP |
904 | dn, dn->d_count, |
905 | realdn, realdn->d_count, | |
355da1eb SW |
906 | realdn->d_inode, ceph_vinop(realdn->d_inode)); |
907 | dput(dn); | |
908 | dn = realdn; | |
909 | } else { | |
910 | BUG_ON(!ceph_dentry(dn)); | |
355da1eb SW |
911 | dout("dn %p attached to %p ino %llx.%llx\n", |
912 | dn, dn->d_inode, ceph_vinop(dn->d_inode)); | |
913 | } | |
914 | if ((!prehash || *prehash) && d_unhashed(dn)) | |
915 | d_rehash(dn); | |
467c5251 SW |
916 | if (set_offset) |
917 | ceph_set_dentry_offset(dn); | |
355da1eb SW |
918 | out: |
919 | return dn; | |
920 | } | |
921 | ||
922 | /* | |
923 | * Incorporate results into the local cache. This is either just | |
924 | * one inode, or a directory, dentry, and possibly linked-to inode (e.g., | |
925 | * after a lookup). | |
926 | * | |
927 | * A reply may contain | |
928 | * a directory inode along with a dentry. | |
929 | * and/or a target inode | |
930 | * | |
931 | * Called with snap_rwsem (read). | |
932 | */ | |
933 | int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req, | |
934 | struct ceph_mds_session *session) | |
935 | { | |
936 | struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; | |
937 | struct inode *in = NULL; | |
938 | struct ceph_mds_reply_inode *ininfo; | |
939 | struct ceph_vino vino; | |
3d14c5d2 | 940 | struct ceph_fs_client *fsc = ceph_sb_to_client(sb); |
355da1eb SW |
941 | int i = 0; |
942 | int err = 0; | |
943 | ||
944 | dout("fill_trace %p is_dentry %d is_target %d\n", req, | |
945 | rinfo->head->is_dentry, rinfo->head->is_target); | |
946 | ||
947 | #if 0 | |
948 | /* | |
949 | * Debugging hook: | |
950 | * | |
951 | * If we resend completed ops to a recovering mds, we get no | |
952 | * trace. Since that is very rare, pretend this is the case | |
953 | * to ensure the 'no trace' handlers in the callers behave. | |
954 | * | |
955 | * Fill in inodes unconditionally to avoid breaking cap | |
956 | * invariants. | |
957 | */ | |
958 | if (rinfo->head->op & CEPH_MDS_OP_WRITE) { | |
959 | pr_info("fill_trace faking empty trace on %lld %s\n", | |
960 | req->r_tid, ceph_mds_op_name(rinfo->head->op)); | |
961 | if (rinfo->head->is_dentry) { | |
962 | rinfo->head->is_dentry = 0; | |
963 | err = fill_inode(req->r_locked_dir, | |
964 | &rinfo->diri, rinfo->dirfrag, | |
965 | session, req->r_request_started, -1); | |
966 | } | |
967 | if (rinfo->head->is_target) { | |
968 | rinfo->head->is_target = 0; | |
969 | ininfo = rinfo->targeti.in; | |
970 | vino.ino = le64_to_cpu(ininfo->ino); | |
971 | vino.snap = le64_to_cpu(ininfo->snapid); | |
972 | in = ceph_get_inode(sb, vino); | |
973 | err = fill_inode(in, &rinfo->targeti, NULL, | |
974 | session, req->r_request_started, | |
975 | req->r_fmode); | |
976 | iput(in); | |
977 | } | |
978 | } | |
979 | #endif | |
980 | ||
981 | if (!rinfo->head->is_target && !rinfo->head->is_dentry) { | |
982 | dout("fill_trace reply is empty!\n"); | |
167c9e35 SW |
983 | if (rinfo->head->result == 0 && req->r_locked_dir) |
984 | ceph_invalidate_dir_request(req); | |
355da1eb SW |
985 | return 0; |
986 | } | |
987 | ||
988 | if (rinfo->head->is_dentry) { | |
5b1daecd SW |
989 | struct inode *dir = req->r_locked_dir; |
990 | ||
991 | err = fill_inode(dir, &rinfo->diri, rinfo->dirfrag, | |
992 | session, req->r_request_started, -1, | |
993 | &req->r_caps_reservation); | |
994 | if (err < 0) | |
995 | return err; | |
996 | } | |
997 | ||
9358c6d4 SW |
998 | /* |
999 | * ignore null lease/binding on snapdir ENOENT, or else we | |
1000 | * will have trouble splicing in the virtual snapdir later | |
1001 | */ | |
1002 | if (rinfo->head->is_dentry && !req->r_aborted && | |
1003 | (rinfo->head->is_target || strncmp(req->r_dentry->d_name.name, | |
3d14c5d2 | 1004 | fsc->mount_options->snapdir_name, |
9358c6d4 | 1005 | req->r_dentry->d_name.len))) { |
355da1eb SW |
1006 | /* |
1007 | * lookup link rename : null -> possibly existing inode | |
1008 | * mknod symlink mkdir : null -> new inode | |
1009 | * unlink : linked -> null | |
1010 | */ | |
1011 | struct inode *dir = req->r_locked_dir; | |
1012 | struct dentry *dn = req->r_dentry; | |
1013 | bool have_dir_cap, have_lease; | |
1014 | ||
1015 | BUG_ON(!dn); | |
1016 | BUG_ON(!dir); | |
1017 | BUG_ON(dn->d_parent->d_inode != dir); | |
1018 | BUG_ON(ceph_ino(dir) != | |
1019 | le64_to_cpu(rinfo->diri.in->ino)); | |
1020 | BUG_ON(ceph_snap(dir) != | |
1021 | le64_to_cpu(rinfo->diri.in->snapid)); | |
1022 | ||
355da1eb SW |
1023 | /* do we have a lease on the whole dir? */ |
1024 | have_dir_cap = | |
1025 | (le32_to_cpu(rinfo->diri.in->cap.caps) & | |
1026 | CEPH_CAP_FILE_SHARED); | |
1027 | ||
1028 | /* do we have a dn lease? */ | |
1029 | have_lease = have_dir_cap || | |
2f90b852 | 1030 | le32_to_cpu(rinfo->dlease->duration_ms); |
355da1eb SW |
1031 | if (!have_lease) |
1032 | dout("fill_trace no dentry lease or dir cap\n"); | |
1033 | ||
1034 | /* rename? */ | |
1035 | if (req->r_old_dentry && req->r_op == CEPH_MDS_OP_RENAME) { | |
1036 | dout(" src %p '%.*s' dst %p '%.*s'\n", | |
1037 | req->r_old_dentry, | |
1038 | req->r_old_dentry->d_name.len, | |
1039 | req->r_old_dentry->d_name.name, | |
1040 | dn, dn->d_name.len, dn->d_name.name); | |
1041 | dout("fill_trace doing d_move %p -> %p\n", | |
1042 | req->r_old_dentry, dn); | |
c10f5e12 | 1043 | |
355da1eb SW |
1044 | d_move(req->r_old_dentry, dn); |
1045 | dout(" src %p '%.*s' dst %p '%.*s'\n", | |
1046 | req->r_old_dentry, | |
1047 | req->r_old_dentry->d_name.len, | |
1048 | req->r_old_dentry->d_name.name, | |
1049 | dn, dn->d_name.len, dn->d_name.name); | |
81a6cf2d | 1050 | |
c4a29f26 SW |
1051 | /* ensure target dentry is invalidated, despite |
1052 | rehashing bug in vfs_rename_dir */ | |
81a6cf2d SW |
1053 | ceph_invalidate_dentry_lease(dn); |
1054 | ||
09adc80c SW |
1055 | /* |
1056 | * d_move() puts the renamed dentry at the end of | |
1057 | * d_subdirs. We need to assign it an appropriate | |
1058 | * directory offset so we can behave when holding | |
c6ffe100 | 1059 | * D_COMPLETE. |
09adc80c SW |
1060 | */ |
1061 | ceph_set_dentry_offset(req->r_old_dentry); | |
1062 | dout("dn %p gets new offset %lld\n", req->r_old_dentry, | |
1cd3935b | 1063 | ceph_dentry(req->r_old_dentry)->offset); |
81a6cf2d | 1064 | |
355da1eb SW |
1065 | dn = req->r_old_dentry; /* use old_dentry */ |
1066 | in = dn->d_inode; | |
1067 | } | |
1068 | ||
1069 | /* null dentry? */ | |
1070 | if (!rinfo->head->is_target) { | |
1071 | dout("fill_trace null dentry\n"); | |
1072 | if (dn->d_inode) { | |
1073 | dout("d_delete %p\n", dn); | |
1074 | d_delete(dn); | |
1075 | } else { | |
1076 | dout("d_instantiate %p NULL\n", dn); | |
1077 | d_instantiate(dn, NULL); | |
1078 | if (have_lease && d_unhashed(dn)) | |
1079 | d_rehash(dn); | |
1080 | update_dentry_lease(dn, rinfo->dlease, | |
1081 | session, | |
1082 | req->r_request_started); | |
1083 | } | |
1084 | goto done; | |
1085 | } | |
1086 | ||
1087 | /* attach proper inode */ | |
1088 | ininfo = rinfo->targeti.in; | |
1089 | vino.ino = le64_to_cpu(ininfo->ino); | |
1090 | vino.snap = le64_to_cpu(ininfo->snapid); | |
d8b16b3d SW |
1091 | in = dn->d_inode; |
1092 | if (!in) { | |
355da1eb SW |
1093 | in = ceph_get_inode(sb, vino); |
1094 | if (IS_ERR(in)) { | |
1095 | pr_err("fill_trace bad get_inode " | |
1096 | "%llx.%llx\n", vino.ino, vino.snap); | |
1097 | err = PTR_ERR(in); | |
1098 | d_delete(dn); | |
1099 | goto done; | |
1100 | } | |
467c5251 | 1101 | dn = splice_dentry(dn, in, &have_lease, true); |
355da1eb SW |
1102 | if (IS_ERR(dn)) { |
1103 | err = PTR_ERR(dn); | |
1104 | goto done; | |
1105 | } | |
1106 | req->r_dentry = dn; /* may have spliced */ | |
70b666c3 | 1107 | ihold(in); |
355da1eb SW |
1108 | } else if (ceph_ino(in) == vino.ino && |
1109 | ceph_snap(in) == vino.snap) { | |
70b666c3 | 1110 | ihold(in); |
355da1eb SW |
1111 | } else { |
1112 | dout(" %p links to %p %llx.%llx, not %llx.%llx\n", | |
1113 | dn, in, ceph_ino(in), ceph_snap(in), | |
1114 | vino.ino, vino.snap); | |
1115 | have_lease = false; | |
1116 | in = NULL; | |
1117 | } | |
1118 | ||
1119 | if (have_lease) | |
1120 | update_dentry_lease(dn, rinfo->dlease, session, | |
1121 | req->r_request_started); | |
1122 | dout(" final dn %p\n", dn); | |
1123 | i++; | |
1124 | } else if (req->r_op == CEPH_MDS_OP_LOOKUPSNAP || | |
1125 | req->r_op == CEPH_MDS_OP_MKSNAP) { | |
1126 | struct dentry *dn = req->r_dentry; | |
1127 | ||
1128 | /* fill out a snapdir LOOKUPSNAP dentry */ | |
1129 | BUG_ON(!dn); | |
1130 | BUG_ON(!req->r_locked_dir); | |
1131 | BUG_ON(ceph_snap(req->r_locked_dir) != CEPH_SNAPDIR); | |
1132 | ininfo = rinfo->targeti.in; | |
1133 | vino.ino = le64_to_cpu(ininfo->ino); | |
1134 | vino.snap = le64_to_cpu(ininfo->snapid); | |
1135 | in = ceph_get_inode(sb, vino); | |
1136 | if (IS_ERR(in)) { | |
1137 | pr_err("fill_inode get_inode badness %llx.%llx\n", | |
1138 | vino.ino, vino.snap); | |
1139 | err = PTR_ERR(in); | |
1140 | d_delete(dn); | |
1141 | goto done; | |
1142 | } | |
1143 | dout(" linking snapped dir %p to dn %p\n", in, dn); | |
467c5251 | 1144 | dn = splice_dentry(dn, in, NULL, true); |
355da1eb SW |
1145 | if (IS_ERR(dn)) { |
1146 | err = PTR_ERR(dn); | |
1147 | goto done; | |
1148 | } | |
1149 | req->r_dentry = dn; /* may have spliced */ | |
70b666c3 | 1150 | ihold(in); |
355da1eb SW |
1151 | rinfo->head->is_dentry = 1; /* fool notrace handlers */ |
1152 | } | |
1153 | ||
1154 | if (rinfo->head->is_target) { | |
1155 | vino.ino = le64_to_cpu(rinfo->targeti.in->ino); | |
1156 | vino.snap = le64_to_cpu(rinfo->targeti.in->snapid); | |
1157 | ||
1158 | if (in == NULL || ceph_ino(in) != vino.ino || | |
1159 | ceph_snap(in) != vino.snap) { | |
1160 | in = ceph_get_inode(sb, vino); | |
1161 | if (IS_ERR(in)) { | |
1162 | err = PTR_ERR(in); | |
1163 | goto done; | |
1164 | } | |
1165 | } | |
1166 | req->r_target_inode = in; | |
1167 | ||
1168 | err = fill_inode(in, | |
1169 | &rinfo->targeti, NULL, | |
1170 | session, req->r_request_started, | |
1171 | (le32_to_cpu(rinfo->head->result) == 0) ? | |
1172 | req->r_fmode : -1, | |
1173 | &req->r_caps_reservation); | |
1174 | if (err < 0) { | |
1175 | pr_err("fill_inode badness %p %llx.%llx\n", | |
1176 | in, ceph_vinop(in)); | |
1177 | goto done; | |
1178 | } | |
1179 | } | |
1180 | ||
1181 | done: | |
1182 | dout("fill_trace done err=%d\n", err); | |
1183 | return err; | |
1184 | } | |
1185 | ||
1186 | /* | |
1187 | * Prepopulate our cache with readdir results, leases, etc. | |
1188 | */ | |
1189 | int ceph_readdir_prepopulate(struct ceph_mds_request *req, | |
1190 | struct ceph_mds_session *session) | |
1191 | { | |
1192 | struct dentry *parent = req->r_dentry; | |
1193 | struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; | |
1194 | struct qstr dname; | |
1195 | struct dentry *dn; | |
1196 | struct inode *in; | |
1197 | int err = 0, i; | |
1198 | struct inode *snapdir = NULL; | |
1199 | struct ceph_mds_request_head *rhead = req->r_request->front.iov_base; | |
1200 | u64 frag = le32_to_cpu(rhead->args.readdir.frag); | |
1201 | struct ceph_dentry_info *di; | |
1202 | ||
1203 | if (le32_to_cpu(rinfo->head->op) == CEPH_MDS_OP_LSSNAP) { | |
1204 | snapdir = ceph_get_snapdir(parent->d_inode); | |
1205 | parent = d_find_alias(snapdir); | |
1206 | dout("readdir_prepopulate %d items under SNAPDIR dn %p\n", | |
1207 | rinfo->dir_nr, parent); | |
1208 | } else { | |
1209 | dout("readdir_prepopulate %d items under dn %p\n", | |
1210 | rinfo->dir_nr, parent); | |
1211 | if (rinfo->dir_dir) | |
1212 | ceph_fill_dirfrag(parent->d_inode, rinfo->dir_dir); | |
1213 | } | |
1214 | ||
1215 | for (i = 0; i < rinfo->dir_nr; i++) { | |
1216 | struct ceph_vino vino; | |
1217 | ||
1218 | dname.name = rinfo->dir_dname[i]; | |
1219 | dname.len = rinfo->dir_dname_len[i]; | |
1220 | dname.hash = full_name_hash(dname.name, dname.len); | |
1221 | ||
1222 | vino.ino = le64_to_cpu(rinfo->dir_in[i].in->ino); | |
1223 | vino.snap = le64_to_cpu(rinfo->dir_in[i].in->snapid); | |
1224 | ||
1225 | retry_lookup: | |
1226 | dn = d_lookup(parent, &dname); | |
1227 | dout("d_lookup on parent=%p name=%.*s got %p\n", | |
1228 | parent, dname.len, dname.name, dn); | |
1229 | ||
1230 | if (!dn) { | |
1231 | dn = d_alloc(parent, &dname); | |
1232 | dout("d_alloc %p '%.*s' = %p\n", parent, | |
1233 | dname.len, dname.name, dn); | |
1234 | if (dn == NULL) { | |
1235 | dout("d_alloc badness\n"); | |
1236 | err = -ENOMEM; | |
1237 | goto out; | |
1238 | } | |
1239 | err = ceph_init_dentry(dn); | |
8c696737 SW |
1240 | if (err < 0) { |
1241 | dput(dn); | |
355da1eb | 1242 | goto out; |
8c696737 | 1243 | } |
355da1eb SW |
1244 | } else if (dn->d_inode && |
1245 | (ceph_ino(dn->d_inode) != vino.ino || | |
1246 | ceph_snap(dn->d_inode) != vino.snap)) { | |
1247 | dout(" dn %p points to wrong inode %p\n", | |
1248 | dn, dn->d_inode); | |
1249 | d_delete(dn); | |
1250 | dput(dn); | |
1251 | goto retry_lookup; | |
1252 | } else { | |
1253 | /* reorder parent's d_subdirs */ | |
2fd6b7f5 NP |
1254 | spin_lock(&parent->d_lock); |
1255 | spin_lock_nested(&dn->d_lock, DENTRY_D_LOCK_NESTED); | |
355da1eb SW |
1256 | list_move(&dn->d_u.d_child, &parent->d_subdirs); |
1257 | spin_unlock(&dn->d_lock); | |
2fd6b7f5 | 1258 | spin_unlock(&parent->d_lock); |
355da1eb SW |
1259 | } |
1260 | ||
1261 | di = dn->d_fsdata; | |
1262 | di->offset = ceph_make_fpos(frag, i + req->r_readdir_offset); | |
1263 | ||
1264 | /* inode */ | |
1265 | if (dn->d_inode) { | |
1266 | in = dn->d_inode; | |
1267 | } else { | |
1268 | in = ceph_get_inode(parent->d_sb, vino); | |
ac1f12ef | 1269 | if (IS_ERR(in)) { |
355da1eb SW |
1270 | dout("new_inode badness\n"); |
1271 | d_delete(dn); | |
1272 | dput(dn); | |
ac1f12ef | 1273 | err = PTR_ERR(in); |
355da1eb SW |
1274 | goto out; |
1275 | } | |
467c5251 | 1276 | dn = splice_dentry(dn, in, NULL, false); |
d69ed05a SW |
1277 | if (IS_ERR(dn)) |
1278 | dn = NULL; | |
355da1eb SW |
1279 | } |
1280 | ||
1281 | if (fill_inode(in, &rinfo->dir_in[i], NULL, session, | |
1282 | req->r_request_started, -1, | |
1283 | &req->r_caps_reservation) < 0) { | |
1284 | pr_err("fill_inode badness on %p\n", in); | |
d69ed05a | 1285 | goto next_item; |
355da1eb | 1286 | } |
d69ed05a SW |
1287 | if (dn) |
1288 | update_dentry_lease(dn, rinfo->dir_dlease[i], | |
1289 | req->r_session, | |
1290 | req->r_request_started); | |
1291 | next_item: | |
1292 | if (dn) | |
1293 | dput(dn); | |
355da1eb SW |
1294 | } |
1295 | req->r_did_prepopulate = true; | |
1296 | ||
1297 | out: | |
1298 | if (snapdir) { | |
1299 | iput(snapdir); | |
1300 | dput(parent); | |
1301 | } | |
1302 | dout("readdir_prepopulate done\n"); | |
1303 | return err; | |
1304 | } | |
1305 | ||
1306 | int ceph_inode_set_size(struct inode *inode, loff_t size) | |
1307 | { | |
1308 | struct ceph_inode_info *ci = ceph_inode(inode); | |
1309 | int ret = 0; | |
1310 | ||
1311 | spin_lock(&inode->i_lock); | |
1312 | dout("set_size %p %llu -> %llu\n", inode, inode->i_size, size); | |
1313 | inode->i_size = size; | |
1314 | inode->i_blocks = (size + (1 << 9) - 1) >> 9; | |
1315 | ||
1316 | /* tell the MDS if we are approaching max_size */ | |
1317 | if ((size << 1) >= ci->i_max_size && | |
1318 | (ci->i_reported_size << 1) < ci->i_max_size) | |
1319 | ret = 1; | |
1320 | ||
1321 | spin_unlock(&inode->i_lock); | |
1322 | return ret; | |
1323 | } | |
1324 | ||
1325 | /* | |
1326 | * Write back inode data in a worker thread. (This can't be done | |
1327 | * in the message handler context.) | |
1328 | */ | |
3c6f6b79 SW |
1329 | void ceph_queue_writeback(struct inode *inode) |
1330 | { | |
15a2015f | 1331 | ihold(inode); |
3c6f6b79 SW |
1332 | if (queue_work(ceph_inode_to_client(inode)->wb_wq, |
1333 | &ceph_inode(inode)->i_wb_work)) { | |
2c27c9a5 | 1334 | dout("ceph_queue_writeback %p\n", inode); |
3c6f6b79 | 1335 | } else { |
2c27c9a5 | 1336 | dout("ceph_queue_writeback %p failed\n", inode); |
15a2015f | 1337 | iput(inode); |
3c6f6b79 SW |
1338 | } |
1339 | } | |
1340 | ||
1341 | static void ceph_writeback_work(struct work_struct *work) | |
355da1eb SW |
1342 | { |
1343 | struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info, | |
1344 | i_wb_work); | |
1345 | struct inode *inode = &ci->vfs_inode; | |
1346 | ||
1347 | dout("writeback %p\n", inode); | |
1348 | filemap_fdatawrite(&inode->i_data); | |
1349 | iput(inode); | |
1350 | } | |
1351 | ||
3c6f6b79 SW |
1352 | /* |
1353 | * queue an async invalidation | |
1354 | */ | |
1355 | void ceph_queue_invalidate(struct inode *inode) | |
1356 | { | |
15a2015f | 1357 | ihold(inode); |
3c6f6b79 SW |
1358 | if (queue_work(ceph_inode_to_client(inode)->pg_inv_wq, |
1359 | &ceph_inode(inode)->i_pg_inv_work)) { | |
1360 | dout("ceph_queue_invalidate %p\n", inode); | |
3c6f6b79 SW |
1361 | } else { |
1362 | dout("ceph_queue_invalidate %p failed\n", inode); | |
15a2015f | 1363 | iput(inode); |
3c6f6b79 SW |
1364 | } |
1365 | } | |
1366 | ||
355da1eb SW |
1367 | /* |
1368 | * Invalidate inode pages in a worker thread. (This can't be done | |
1369 | * in the message handler context.) | |
1370 | */ | |
3c6f6b79 | 1371 | static void ceph_invalidate_work(struct work_struct *work) |
355da1eb SW |
1372 | { |
1373 | struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info, | |
1374 | i_pg_inv_work); | |
1375 | struct inode *inode = &ci->vfs_inode; | |
1376 | u32 orig_gen; | |
1377 | int check = 0; | |
1378 | ||
1379 | spin_lock(&inode->i_lock); | |
1380 | dout("invalidate_pages %p gen %d revoking %d\n", inode, | |
1381 | ci->i_rdcache_gen, ci->i_rdcache_revoking); | |
cd045cb4 | 1382 | if (ci->i_rdcache_revoking != ci->i_rdcache_gen) { |
355da1eb | 1383 | /* nevermind! */ |
355da1eb SW |
1384 | spin_unlock(&inode->i_lock); |
1385 | goto out; | |
1386 | } | |
1387 | orig_gen = ci->i_rdcache_gen; | |
1388 | spin_unlock(&inode->i_lock); | |
1389 | ||
83eaea22 | 1390 | truncate_inode_pages(&inode->i_data, 0); |
355da1eb SW |
1391 | |
1392 | spin_lock(&inode->i_lock); | |
cd045cb4 SW |
1393 | if (orig_gen == ci->i_rdcache_gen && |
1394 | orig_gen == ci->i_rdcache_revoking) { | |
355da1eb SW |
1395 | dout("invalidate_pages %p gen %d successful\n", inode, |
1396 | ci->i_rdcache_gen); | |
cd045cb4 | 1397 | ci->i_rdcache_revoking--; |
355da1eb SW |
1398 | check = 1; |
1399 | } else { | |
cd045cb4 SW |
1400 | dout("invalidate_pages %p gen %d raced, now %d revoking %d\n", |
1401 | inode, orig_gen, ci->i_rdcache_gen, | |
1402 | ci->i_rdcache_revoking); | |
355da1eb SW |
1403 | } |
1404 | spin_unlock(&inode->i_lock); | |
1405 | ||
1406 | if (check) | |
1407 | ceph_check_caps(ci, 0, NULL); | |
1408 | out: | |
1409 | iput(inode); | |
1410 | } | |
1411 | ||
1412 | ||
1413 | /* | |
1414 | * called by trunc_wq; take i_mutex ourselves | |
1415 | * | |
1416 | * We also truncate in a separate thread as well. | |
1417 | */ | |
3c6f6b79 | 1418 | static void ceph_vmtruncate_work(struct work_struct *work) |
355da1eb SW |
1419 | { |
1420 | struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info, | |
1421 | i_vmtruncate_work); | |
1422 | struct inode *inode = &ci->vfs_inode; | |
1423 | ||
1424 | dout("vmtruncate_work %p\n", inode); | |
1425 | mutex_lock(&inode->i_mutex); | |
1426 | __ceph_do_pending_vmtruncate(inode); | |
1427 | mutex_unlock(&inode->i_mutex); | |
1428 | iput(inode); | |
1429 | } | |
1430 | ||
3c6f6b79 SW |
1431 | /* |
1432 | * Queue an async vmtruncate. If we fail to queue work, we will handle | |
1433 | * the truncation the next time we call __ceph_do_pending_vmtruncate. | |
1434 | */ | |
1435 | void ceph_queue_vmtruncate(struct inode *inode) | |
1436 | { | |
1437 | struct ceph_inode_info *ci = ceph_inode(inode); | |
1438 | ||
15a2015f | 1439 | ihold(inode); |
640ef79d | 1440 | if (queue_work(ceph_sb_to_client(inode->i_sb)->trunc_wq, |
3c6f6b79 SW |
1441 | &ci->i_vmtruncate_work)) { |
1442 | dout("ceph_queue_vmtruncate %p\n", inode); | |
3c6f6b79 SW |
1443 | } else { |
1444 | dout("ceph_queue_vmtruncate %p failed, pending=%d\n", | |
1445 | inode, ci->i_truncate_pending); | |
15a2015f | 1446 | iput(inode); |
3c6f6b79 SW |
1447 | } |
1448 | } | |
1449 | ||
355da1eb SW |
1450 | /* |
1451 | * called with i_mutex held. | |
1452 | * | |
1453 | * Make sure any pending truncation is applied before doing anything | |
1454 | * that may depend on it. | |
1455 | */ | |
1456 | void __ceph_do_pending_vmtruncate(struct inode *inode) | |
1457 | { | |
1458 | struct ceph_inode_info *ci = ceph_inode(inode); | |
1459 | u64 to; | |
1460 | int wrbuffer_refs, wake = 0; | |
1461 | ||
1462 | retry: | |
1463 | spin_lock(&inode->i_lock); | |
1464 | if (ci->i_truncate_pending == 0) { | |
1465 | dout("__do_pending_vmtruncate %p none pending\n", inode); | |
1466 | spin_unlock(&inode->i_lock); | |
1467 | return; | |
1468 | } | |
1469 | ||
1470 | /* | |
1471 | * make sure any dirty snapped pages are flushed before we | |
1472 | * possibly truncate them.. so write AND block! | |
1473 | */ | |
1474 | if (ci->i_wrbuffer_ref_head < ci->i_wrbuffer_ref) { | |
1475 | dout("__do_pending_vmtruncate %p flushing snaps first\n", | |
1476 | inode); | |
1477 | spin_unlock(&inode->i_lock); | |
1478 | filemap_write_and_wait_range(&inode->i_data, 0, | |
1479 | inode->i_sb->s_maxbytes); | |
1480 | goto retry; | |
1481 | } | |
1482 | ||
1483 | to = ci->i_truncate_size; | |
1484 | wrbuffer_refs = ci->i_wrbuffer_ref; | |
1485 | dout("__do_pending_vmtruncate %p (%d) to %lld\n", inode, | |
1486 | ci->i_truncate_pending, to); | |
1487 | spin_unlock(&inode->i_lock); | |
1488 | ||
1489 | truncate_inode_pages(inode->i_mapping, to); | |
1490 | ||
1491 | spin_lock(&inode->i_lock); | |
1492 | ci->i_truncate_pending--; | |
1493 | if (ci->i_truncate_pending == 0) | |
1494 | wake = 1; | |
1495 | spin_unlock(&inode->i_lock); | |
1496 | ||
1497 | if (wrbuffer_refs == 0) | |
1498 | ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL); | |
1499 | if (wake) | |
03066f23 | 1500 | wake_up_all(&ci->i_cap_wq); |
355da1eb SW |
1501 | } |
1502 | ||
1503 | ||
1504 | /* | |
1505 | * symlinks | |
1506 | */ | |
1507 | static void *ceph_sym_follow_link(struct dentry *dentry, struct nameidata *nd) | |
1508 | { | |
1509 | struct ceph_inode_info *ci = ceph_inode(dentry->d_inode); | |
1510 | nd_set_link(nd, ci->i_symlink); | |
1511 | return NULL; | |
1512 | } | |
1513 | ||
1514 | static const struct inode_operations ceph_symlink_iops = { | |
1515 | .readlink = generic_readlink, | |
1516 | .follow_link = ceph_sym_follow_link, | |
1517 | }; | |
1518 | ||
1519 | /* | |
1520 | * setattr | |
1521 | */ | |
1522 | int ceph_setattr(struct dentry *dentry, struct iattr *attr) | |
1523 | { | |
1524 | struct inode *inode = dentry->d_inode; | |
1525 | struct ceph_inode_info *ci = ceph_inode(inode); | |
5f21c96d | 1526 | struct inode *parent_inode; |
355da1eb SW |
1527 | const unsigned int ia_valid = attr->ia_valid; |
1528 | struct ceph_mds_request *req; | |
3d14c5d2 | 1529 | struct ceph_mds_client *mdsc = ceph_sb_to_client(dentry->d_sb)->mdsc; |
355da1eb SW |
1530 | int issued; |
1531 | int release = 0, dirtied = 0; | |
1532 | int mask = 0; | |
1533 | int err = 0; | |
fca65b4a | 1534 | int inode_dirty_flags = 0; |
355da1eb SW |
1535 | |
1536 | if (ceph_snap(inode) != CEPH_NOSNAP) | |
1537 | return -EROFS; | |
1538 | ||
1539 | __ceph_do_pending_vmtruncate(inode); | |
1540 | ||
1541 | err = inode_change_ok(inode, attr); | |
1542 | if (err != 0) | |
1543 | return err; | |
1544 | ||
1545 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETATTR, | |
1546 | USE_AUTH_MDS); | |
1547 | if (IS_ERR(req)) | |
1548 | return PTR_ERR(req); | |
1549 | ||
1550 | spin_lock(&inode->i_lock); | |
1551 | issued = __ceph_caps_issued(ci, NULL); | |
1552 | dout("setattr %p issued %s\n", inode, ceph_cap_string(issued)); | |
1553 | ||
1554 | if (ia_valid & ATTR_UID) { | |
1555 | dout("setattr %p uid %d -> %d\n", inode, | |
1556 | inode->i_uid, attr->ia_uid); | |
1557 | if (issued & CEPH_CAP_AUTH_EXCL) { | |
1558 | inode->i_uid = attr->ia_uid; | |
1559 | dirtied |= CEPH_CAP_AUTH_EXCL; | |
1560 | } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || | |
1561 | attr->ia_uid != inode->i_uid) { | |
1562 | req->r_args.setattr.uid = cpu_to_le32(attr->ia_uid); | |
1563 | mask |= CEPH_SETATTR_UID; | |
1564 | release |= CEPH_CAP_AUTH_SHARED; | |
1565 | } | |
1566 | } | |
1567 | if (ia_valid & ATTR_GID) { | |
1568 | dout("setattr %p gid %d -> %d\n", inode, | |
1569 | inode->i_gid, attr->ia_gid); | |
1570 | if (issued & CEPH_CAP_AUTH_EXCL) { | |
1571 | inode->i_gid = attr->ia_gid; | |
1572 | dirtied |= CEPH_CAP_AUTH_EXCL; | |
1573 | } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || | |
1574 | attr->ia_gid != inode->i_gid) { | |
1575 | req->r_args.setattr.gid = cpu_to_le32(attr->ia_gid); | |
1576 | mask |= CEPH_SETATTR_GID; | |
1577 | release |= CEPH_CAP_AUTH_SHARED; | |
1578 | } | |
1579 | } | |
1580 | if (ia_valid & ATTR_MODE) { | |
1581 | dout("setattr %p mode 0%o -> 0%o\n", inode, inode->i_mode, | |
1582 | attr->ia_mode); | |
1583 | if (issued & CEPH_CAP_AUTH_EXCL) { | |
1584 | inode->i_mode = attr->ia_mode; | |
1585 | dirtied |= CEPH_CAP_AUTH_EXCL; | |
1586 | } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || | |
1587 | attr->ia_mode != inode->i_mode) { | |
1588 | req->r_args.setattr.mode = cpu_to_le32(attr->ia_mode); | |
1589 | mask |= CEPH_SETATTR_MODE; | |
1590 | release |= CEPH_CAP_AUTH_SHARED; | |
1591 | } | |
1592 | } | |
1593 | ||
1594 | if (ia_valid & ATTR_ATIME) { | |
1595 | dout("setattr %p atime %ld.%ld -> %ld.%ld\n", inode, | |
1596 | inode->i_atime.tv_sec, inode->i_atime.tv_nsec, | |
1597 | attr->ia_atime.tv_sec, attr->ia_atime.tv_nsec); | |
1598 | if (issued & CEPH_CAP_FILE_EXCL) { | |
1599 | ci->i_time_warp_seq++; | |
1600 | inode->i_atime = attr->ia_atime; | |
1601 | dirtied |= CEPH_CAP_FILE_EXCL; | |
1602 | } else if ((issued & CEPH_CAP_FILE_WR) && | |
1603 | timespec_compare(&inode->i_atime, | |
1604 | &attr->ia_atime) < 0) { | |
1605 | inode->i_atime = attr->ia_atime; | |
1606 | dirtied |= CEPH_CAP_FILE_WR; | |
1607 | } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || | |
1608 | !timespec_equal(&inode->i_atime, &attr->ia_atime)) { | |
1609 | ceph_encode_timespec(&req->r_args.setattr.atime, | |
1610 | &attr->ia_atime); | |
1611 | mask |= CEPH_SETATTR_ATIME; | |
1612 | release |= CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_RD | | |
1613 | CEPH_CAP_FILE_WR; | |
1614 | } | |
1615 | } | |
1616 | if (ia_valid & ATTR_MTIME) { | |
1617 | dout("setattr %p mtime %ld.%ld -> %ld.%ld\n", inode, | |
1618 | inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec, | |
1619 | attr->ia_mtime.tv_sec, attr->ia_mtime.tv_nsec); | |
1620 | if (issued & CEPH_CAP_FILE_EXCL) { | |
1621 | ci->i_time_warp_seq++; | |
1622 | inode->i_mtime = attr->ia_mtime; | |
1623 | dirtied |= CEPH_CAP_FILE_EXCL; | |
1624 | } else if ((issued & CEPH_CAP_FILE_WR) && | |
1625 | timespec_compare(&inode->i_mtime, | |
1626 | &attr->ia_mtime) < 0) { | |
1627 | inode->i_mtime = attr->ia_mtime; | |
1628 | dirtied |= CEPH_CAP_FILE_WR; | |
1629 | } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || | |
1630 | !timespec_equal(&inode->i_mtime, &attr->ia_mtime)) { | |
1631 | ceph_encode_timespec(&req->r_args.setattr.mtime, | |
1632 | &attr->ia_mtime); | |
1633 | mask |= CEPH_SETATTR_MTIME; | |
1634 | release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_RD | | |
1635 | CEPH_CAP_FILE_WR; | |
1636 | } | |
1637 | } | |
1638 | if (ia_valid & ATTR_SIZE) { | |
1639 | dout("setattr %p size %lld -> %lld\n", inode, | |
1640 | inode->i_size, attr->ia_size); | |
1641 | if (attr->ia_size > inode->i_sb->s_maxbytes) { | |
1642 | err = -EINVAL; | |
1643 | goto out; | |
1644 | } | |
1645 | if ((issued & CEPH_CAP_FILE_EXCL) && | |
1646 | attr->ia_size > inode->i_size) { | |
1647 | inode->i_size = attr->ia_size; | |
355da1eb SW |
1648 | inode->i_blocks = |
1649 | (attr->ia_size + (1 << 9) - 1) >> 9; | |
1650 | inode->i_ctime = attr->ia_ctime; | |
1651 | ci->i_reported_size = attr->ia_size; | |
1652 | dirtied |= CEPH_CAP_FILE_EXCL; | |
1653 | } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || | |
1654 | attr->ia_size != inode->i_size) { | |
1655 | req->r_args.setattr.size = cpu_to_le64(attr->ia_size); | |
1656 | req->r_args.setattr.old_size = | |
1657 | cpu_to_le64(inode->i_size); | |
1658 | mask |= CEPH_SETATTR_SIZE; | |
1659 | release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_RD | | |
1660 | CEPH_CAP_FILE_WR; | |
1661 | } | |
1662 | } | |
1663 | ||
1664 | /* these do nothing */ | |
1665 | if (ia_valid & ATTR_CTIME) { | |
1666 | bool only = (ia_valid & (ATTR_SIZE|ATTR_MTIME|ATTR_ATIME| | |
1667 | ATTR_MODE|ATTR_UID|ATTR_GID)) == 0; | |
1668 | dout("setattr %p ctime %ld.%ld -> %ld.%ld (%s)\n", inode, | |
1669 | inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec, | |
1670 | attr->ia_ctime.tv_sec, attr->ia_ctime.tv_nsec, | |
1671 | only ? "ctime only" : "ignored"); | |
1672 | inode->i_ctime = attr->ia_ctime; | |
1673 | if (only) { | |
1674 | /* | |
1675 | * if kernel wants to dirty ctime but nothing else, | |
1676 | * we need to choose a cap to dirty under, or do | |
1677 | * a almost-no-op setattr | |
1678 | */ | |
1679 | if (issued & CEPH_CAP_AUTH_EXCL) | |
1680 | dirtied |= CEPH_CAP_AUTH_EXCL; | |
1681 | else if (issued & CEPH_CAP_FILE_EXCL) | |
1682 | dirtied |= CEPH_CAP_FILE_EXCL; | |
1683 | else if (issued & CEPH_CAP_XATTR_EXCL) | |
1684 | dirtied |= CEPH_CAP_XATTR_EXCL; | |
1685 | else | |
1686 | mask |= CEPH_SETATTR_CTIME; | |
1687 | } | |
1688 | } | |
1689 | if (ia_valid & ATTR_FILE) | |
1690 | dout("setattr %p ATTR_FILE ... hrm!\n", inode); | |
1691 | ||
1692 | if (dirtied) { | |
fca65b4a | 1693 | inode_dirty_flags = __ceph_mark_dirty_caps(ci, dirtied); |
355da1eb SW |
1694 | inode->i_ctime = CURRENT_TIME; |
1695 | } | |
1696 | ||
1697 | release &= issued; | |
1698 | spin_unlock(&inode->i_lock); | |
1699 | ||
fca65b4a SW |
1700 | if (inode_dirty_flags) |
1701 | __mark_inode_dirty(inode, inode_dirty_flags); | |
1702 | ||
355da1eb | 1703 | if (mask) { |
70b666c3 SW |
1704 | req->r_inode = inode; |
1705 | ihold(inode); | |
355da1eb SW |
1706 | req->r_inode_drop = release; |
1707 | req->r_args.setattr.mask = cpu_to_le32(mask); | |
1708 | req->r_num_caps = 1; | |
5f21c96d | 1709 | parent_inode = ceph_get_dentry_parent_inode(dentry); |
355da1eb | 1710 | err = ceph_mdsc_do_request(mdsc, parent_inode, req); |
5f21c96d | 1711 | iput(parent_inode); |
355da1eb SW |
1712 | } |
1713 | dout("setattr %p result=%d (%s locally, %d remote)\n", inode, err, | |
1714 | ceph_cap_string(dirtied), mask); | |
1715 | ||
1716 | ceph_mdsc_put_request(req); | |
1717 | __ceph_do_pending_vmtruncate(inode); | |
1718 | return err; | |
1719 | out: | |
1720 | spin_unlock(&inode->i_lock); | |
1721 | ceph_mdsc_put_request(req); | |
1722 | return err; | |
1723 | } | |
1724 | ||
1725 | /* | |
1726 | * Verify that we have a lease on the given mask. If not, | |
1727 | * do a getattr against an mds. | |
1728 | */ | |
1729 | int ceph_do_getattr(struct inode *inode, int mask) | |
1730 | { | |
3d14c5d2 YS |
1731 | struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb); |
1732 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
355da1eb SW |
1733 | struct ceph_mds_request *req; |
1734 | int err; | |
1735 | ||
1736 | if (ceph_snap(inode) == CEPH_SNAPDIR) { | |
1737 | dout("do_getattr inode %p SNAPDIR\n", inode); | |
1738 | return 0; | |
1739 | } | |
1740 | ||
b7495fc2 | 1741 | dout("do_getattr inode %p mask %s mode 0%o\n", inode, ceph_cap_string(mask), inode->i_mode); |
355da1eb SW |
1742 | if (ceph_caps_issued_mask(ceph_inode(inode), mask, 1)) |
1743 | return 0; | |
1744 | ||
1745 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS); | |
1746 | if (IS_ERR(req)) | |
1747 | return PTR_ERR(req); | |
70b666c3 SW |
1748 | req->r_inode = inode; |
1749 | ihold(inode); | |
355da1eb SW |
1750 | req->r_num_caps = 1; |
1751 | req->r_args.getattr.mask = cpu_to_le32(mask); | |
1752 | err = ceph_mdsc_do_request(mdsc, NULL, req); | |
1753 | ceph_mdsc_put_request(req); | |
1754 | dout("do_getattr result=%d\n", err); | |
1755 | return err; | |
1756 | } | |
1757 | ||
1758 | ||
1759 | /* | |
1760 | * Check inode permissions. We verify we have a valid value for | |
1761 | * the AUTH cap, then call the generic handler. | |
1762 | */ | |
10556cb2 | 1763 | int ceph_permission(struct inode *inode, int mask) |
355da1eb | 1764 | { |
b74c79e9 NP |
1765 | int err; |
1766 | ||
10556cb2 | 1767 | if (mask & MAY_NOT_BLOCK) |
b74c79e9 NP |
1768 | return -ECHILD; |
1769 | ||
1770 | err = ceph_do_getattr(inode, CEPH_CAP_AUTH_SHARED); | |
355da1eb SW |
1771 | |
1772 | if (!err) | |
2830ba7f | 1773 | err = generic_permission(inode, mask); |
355da1eb SW |
1774 | return err; |
1775 | } | |
1776 | ||
1777 | /* | |
1778 | * Get all attributes. Hopefully somedata we'll have a statlite() | |
1779 | * and can limit the fields we require to be accurate. | |
1780 | */ | |
1781 | int ceph_getattr(struct vfsmount *mnt, struct dentry *dentry, | |
1782 | struct kstat *stat) | |
1783 | { | |
1784 | struct inode *inode = dentry->d_inode; | |
232d4b01 | 1785 | struct ceph_inode_info *ci = ceph_inode(inode); |
355da1eb SW |
1786 | int err; |
1787 | ||
1788 | err = ceph_do_getattr(inode, CEPH_STAT_CAP_INODE_ALL); | |
1789 | if (!err) { | |
1790 | generic_fillattr(inode, stat); | |
ad1fee96 | 1791 | stat->ino = ceph_translate_ino(inode->i_sb, inode->i_ino); |
355da1eb SW |
1792 | if (ceph_snap(inode) != CEPH_NOSNAP) |
1793 | stat->dev = ceph_snap(inode); | |
1794 | else | |
1795 | stat->dev = 0; | |
232d4b01 | 1796 | if (S_ISDIR(inode->i_mode)) { |
1c1266bb YS |
1797 | if (ceph_test_mount_opt(ceph_sb_to_client(inode->i_sb), |
1798 | RBYTES)) | |
1799 | stat->size = ci->i_rbytes; | |
1800 | else | |
1801 | stat->size = ci->i_files + ci->i_subdirs; | |
232d4b01 | 1802 | stat->blocks = 0; |
355da1eb | 1803 | stat->blksize = 65536; |
232d4b01 | 1804 | } |
355da1eb SW |
1805 | } |
1806 | return err; | |
1807 | } |