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