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> | |
355da1eb SW |
9 | #include <linux/writeback.h> |
10 | #include <linux/vmalloc.h> | |
2cdeb1e4 | 11 | #include <linux/xattr.h> |
4db658ea | 12 | #include <linux/posix_acl.h> |
3e7fbe9c | 13 | #include <linux/random.h> |
a407846e | 14 | #include <linux/sort.h> |
355da1eb SW |
15 | |
16 | #include "super.h" | |
3d14c5d2 | 17 | #include "mds_client.h" |
99ccbd22 | 18 | #include "cache.h" |
3d14c5d2 | 19 | #include <linux/ceph/decode.h> |
355da1eb SW |
20 | |
21 | /* | |
22 | * Ceph inode operations | |
23 | * | |
24 | * Implement basic inode helpers (get, alloc) and inode ops (getattr, | |
25 | * setattr, etc.), xattr helpers, and helpers for assimilating | |
26 | * metadata returned by the MDS into our cache. | |
27 | * | |
28 | * Also define helpers for doing asynchronous writeback, invalidation, | |
29 | * and truncation for the benefit of those who can't afford to block | |
30 | * (typically because they are in the message handler path). | |
31 | */ | |
32 | ||
33 | static const struct inode_operations ceph_symlink_iops; | |
34 | ||
3c6f6b79 SW |
35 | static void ceph_invalidate_work(struct work_struct *work); |
36 | static void ceph_writeback_work(struct work_struct *work); | |
37 | static void ceph_vmtruncate_work(struct work_struct *work); | |
355da1eb SW |
38 | |
39 | /* | |
40 | * find or create an inode, given the ceph ino number | |
41 | */ | |
ad1fee96 YS |
42 | static int ceph_set_ino_cb(struct inode *inode, void *data) |
43 | { | |
44 | ceph_inode(inode)->i_vino = *(struct ceph_vino *)data; | |
45 | inode->i_ino = ceph_vino_to_ino(*(struct ceph_vino *)data); | |
46 | return 0; | |
47 | } | |
48 | ||
355da1eb SW |
49 | struct inode *ceph_get_inode(struct super_block *sb, struct ceph_vino vino) |
50 | { | |
51 | struct inode *inode; | |
52 | ino_t t = ceph_vino_to_ino(vino); | |
53 | ||
54 | inode = iget5_locked(sb, t, ceph_ino_compare, ceph_set_ino_cb, &vino); | |
55 | if (inode == NULL) | |
56 | return ERR_PTR(-ENOMEM); | |
57 | if (inode->i_state & I_NEW) { | |
58 | dout("get_inode created new inode %p %llx.%llx ino %llx\n", | |
59 | inode, ceph_vinop(inode), (u64)inode->i_ino); | |
60 | unlock_new_inode(inode); | |
61 | } | |
62 | ||
63 | dout("get_inode on %lu=%llx.%llx got %p\n", inode->i_ino, vino.ino, | |
64 | vino.snap, inode); | |
65 | return inode; | |
66 | } | |
67 | ||
68 | /* | |
69 | * get/constuct snapdir inode for a given directory | |
70 | */ | |
71 | struct inode *ceph_get_snapdir(struct inode *parent) | |
72 | { | |
73 | struct ceph_vino vino = { | |
74 | .ino = ceph_ino(parent), | |
75 | .snap = CEPH_SNAPDIR, | |
76 | }; | |
77 | struct inode *inode = ceph_get_inode(parent->i_sb, vino); | |
b377ff13 | 78 | struct ceph_inode_info *ci = ceph_inode(inode); |
355da1eb SW |
79 | |
80 | BUG_ON(!S_ISDIR(parent->i_mode)); | |
81 | if (IS_ERR(inode)) | |
7e34bc52 | 82 | return inode; |
355da1eb SW |
83 | inode->i_mode = parent->i_mode; |
84 | inode->i_uid = parent->i_uid; | |
85 | inode->i_gid = parent->i_gid; | |
38c48b5f YZ |
86 | inode->i_op = &ceph_snapdir_iops; |
87 | inode->i_fop = &ceph_snapdir_fops; | |
b377ff13 SW |
88 | ci->i_snap_caps = CEPH_CAP_PIN; /* so we can open */ |
89 | ci->i_rbytes = 0; | |
355da1eb SW |
90 | return inode; |
91 | } | |
92 | ||
93 | const struct inode_operations ceph_file_iops = { | |
94 | .permission = ceph_permission, | |
95 | .setattr = ceph_setattr, | |
96 | .getattr = ceph_getattr, | |
2cdeb1e4 AG |
97 | .setxattr = generic_setxattr, |
98 | .getxattr = generic_getxattr, | |
355da1eb | 99 | .listxattr = ceph_listxattr, |
2cdeb1e4 | 100 | .removexattr = generic_removexattr, |
7221fe4c | 101 | .get_acl = ceph_get_acl, |
72466d0b | 102 | .set_acl = ceph_set_acl, |
355da1eb SW |
103 | }; |
104 | ||
105 | ||
106 | /* | |
107 | * We use a 'frag tree' to keep track of the MDS's directory fragments | |
108 | * for a given inode (usually there is just a single fragment). We | |
109 | * need to know when a child frag is delegated to a new MDS, or when | |
110 | * it is flagged as replicated, so we can direct our requests | |
111 | * accordingly. | |
112 | */ | |
113 | ||
114 | /* | |
115 | * find/create a frag in the tree | |
116 | */ | |
117 | static struct ceph_inode_frag *__get_or_create_frag(struct ceph_inode_info *ci, | |
118 | u32 f) | |
119 | { | |
120 | struct rb_node **p; | |
121 | struct rb_node *parent = NULL; | |
122 | struct ceph_inode_frag *frag; | |
123 | int c; | |
124 | ||
125 | p = &ci->i_fragtree.rb_node; | |
126 | while (*p) { | |
127 | parent = *p; | |
128 | frag = rb_entry(parent, struct ceph_inode_frag, node); | |
129 | c = ceph_frag_compare(f, frag->frag); | |
130 | if (c < 0) | |
131 | p = &(*p)->rb_left; | |
132 | else if (c > 0) | |
133 | p = &(*p)->rb_right; | |
134 | else | |
135 | return frag; | |
136 | } | |
137 | ||
138 | frag = kmalloc(sizeof(*frag), GFP_NOFS); | |
139 | if (!frag) { | |
140 | pr_err("__get_or_create_frag ENOMEM on %p %llx.%llx " | |
141 | "frag %x\n", &ci->vfs_inode, | |
142 | ceph_vinop(&ci->vfs_inode), f); | |
143 | return ERR_PTR(-ENOMEM); | |
144 | } | |
145 | frag->frag = f; | |
146 | frag->split_by = 0; | |
147 | frag->mds = -1; | |
148 | frag->ndist = 0; | |
149 | ||
150 | rb_link_node(&frag->node, parent, p); | |
151 | rb_insert_color(&frag->node, &ci->i_fragtree); | |
152 | ||
153 | dout("get_or_create_frag added %llx.%llx frag %x\n", | |
154 | ceph_vinop(&ci->vfs_inode), f); | |
155 | return frag; | |
156 | } | |
157 | ||
158 | /* | |
159 | * find a specific frag @f | |
160 | */ | |
161 | struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci, u32 f) | |
162 | { | |
163 | struct rb_node *n = ci->i_fragtree.rb_node; | |
164 | ||
165 | while (n) { | |
166 | struct ceph_inode_frag *frag = | |
167 | rb_entry(n, struct ceph_inode_frag, node); | |
168 | int c = ceph_frag_compare(f, frag->frag); | |
169 | if (c < 0) | |
170 | n = n->rb_left; | |
171 | else if (c > 0) | |
172 | n = n->rb_right; | |
173 | else | |
174 | return frag; | |
175 | } | |
176 | return NULL; | |
177 | } | |
178 | ||
179 | /* | |
180 | * Choose frag containing the given value @v. If @pfrag is | |
181 | * specified, copy the frag delegation info to the caller if | |
182 | * it is present. | |
183 | */ | |
3e7fbe9c YZ |
184 | static u32 __ceph_choose_frag(struct ceph_inode_info *ci, u32 v, |
185 | struct ceph_inode_frag *pfrag, int *found) | |
355da1eb SW |
186 | { |
187 | u32 t = ceph_frag_make(0, 0); | |
188 | struct ceph_inode_frag *frag; | |
189 | unsigned nway, i; | |
190 | u32 n; | |
191 | ||
192 | if (found) | |
193 | *found = 0; | |
194 | ||
355da1eb SW |
195 | while (1) { |
196 | WARN_ON(!ceph_frag_contains_value(t, v)); | |
197 | frag = __ceph_find_frag(ci, t); | |
198 | if (!frag) | |
199 | break; /* t is a leaf */ | |
200 | if (frag->split_by == 0) { | |
201 | if (pfrag) | |
202 | memcpy(pfrag, frag, sizeof(*pfrag)); | |
203 | if (found) | |
204 | *found = 1; | |
205 | break; | |
206 | } | |
207 | ||
208 | /* choose child */ | |
209 | nway = 1 << frag->split_by; | |
210 | dout("choose_frag(%x) %x splits by %d (%d ways)\n", v, t, | |
211 | frag->split_by, nway); | |
212 | for (i = 0; i < nway; i++) { | |
213 | n = ceph_frag_make_child(t, frag->split_by, i); | |
214 | if (ceph_frag_contains_value(n, v)) { | |
215 | t = n; | |
216 | break; | |
217 | } | |
218 | } | |
219 | BUG_ON(i == nway); | |
220 | } | |
221 | dout("choose_frag(%x) = %x\n", v, t); | |
222 | ||
355da1eb SW |
223 | return t; |
224 | } | |
225 | ||
3e7fbe9c YZ |
226 | u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v, |
227 | struct ceph_inode_frag *pfrag, int *found) | |
228 | { | |
229 | u32 ret; | |
230 | mutex_lock(&ci->i_fragtree_mutex); | |
231 | ret = __ceph_choose_frag(ci, v, pfrag, found); | |
232 | mutex_unlock(&ci->i_fragtree_mutex); | |
233 | return ret; | |
234 | } | |
235 | ||
355da1eb SW |
236 | /* |
237 | * Process dirfrag (delegation) info from the mds. Include leaf | |
238 | * fragment in tree ONLY if ndist > 0. Otherwise, only | |
239 | * branches/splits are included in i_fragtree) | |
240 | */ | |
241 | static int ceph_fill_dirfrag(struct inode *inode, | |
242 | struct ceph_mds_reply_dirfrag *dirinfo) | |
243 | { | |
244 | struct ceph_inode_info *ci = ceph_inode(inode); | |
245 | struct ceph_inode_frag *frag; | |
246 | u32 id = le32_to_cpu(dirinfo->frag); | |
247 | int mds = le32_to_cpu(dirinfo->auth); | |
248 | int ndist = le32_to_cpu(dirinfo->ndist); | |
8d08503c | 249 | int diri_auth = -1; |
355da1eb SW |
250 | int i; |
251 | int err = 0; | |
252 | ||
8d08503c YZ |
253 | spin_lock(&ci->i_ceph_lock); |
254 | if (ci->i_auth_cap) | |
255 | diri_auth = ci->i_auth_cap->mds; | |
256 | spin_unlock(&ci->i_ceph_lock); | |
257 | ||
42172119 YZ |
258 | if (mds == -1) /* CDIR_AUTH_PARENT */ |
259 | mds = diri_auth; | |
260 | ||
355da1eb | 261 | mutex_lock(&ci->i_fragtree_mutex); |
8d08503c | 262 | if (ndist == 0 && mds == diri_auth) { |
355da1eb SW |
263 | /* no delegation info needed. */ |
264 | frag = __ceph_find_frag(ci, id); | |
265 | if (!frag) | |
266 | goto out; | |
267 | if (frag->split_by == 0) { | |
268 | /* tree leaf, remove */ | |
269 | dout("fill_dirfrag removed %llx.%llx frag %x" | |
270 | " (no ref)\n", ceph_vinop(inode), id); | |
271 | rb_erase(&frag->node, &ci->i_fragtree); | |
272 | kfree(frag); | |
273 | } else { | |
274 | /* tree branch, keep and clear */ | |
275 | dout("fill_dirfrag cleared %llx.%llx frag %x" | |
276 | " referral\n", ceph_vinop(inode), id); | |
277 | frag->mds = -1; | |
278 | frag->ndist = 0; | |
279 | } | |
280 | goto out; | |
281 | } | |
282 | ||
283 | ||
284 | /* find/add this frag to store mds delegation info */ | |
285 | frag = __get_or_create_frag(ci, id); | |
286 | if (IS_ERR(frag)) { | |
287 | /* this is not the end of the world; we can continue | |
288 | with bad/inaccurate delegation info */ | |
289 | pr_err("fill_dirfrag ENOMEM on mds ref %llx.%llx fg %x\n", | |
290 | ceph_vinop(inode), le32_to_cpu(dirinfo->frag)); | |
291 | err = -ENOMEM; | |
292 | goto out; | |
293 | } | |
294 | ||
295 | frag->mds = mds; | |
296 | frag->ndist = min_t(u32, ndist, CEPH_MAX_DIRFRAG_REP); | |
297 | for (i = 0; i < frag->ndist; i++) | |
298 | frag->dist[i] = le32_to_cpu(dirinfo->dist[i]); | |
299 | dout("fill_dirfrag %llx.%llx frag %x ndist=%d\n", | |
300 | ceph_vinop(inode), frag->frag, frag->ndist); | |
301 | ||
302 | out: | |
303 | mutex_unlock(&ci->i_fragtree_mutex); | |
304 | return err; | |
305 | } | |
306 | ||
a407846e YZ |
307 | static int frag_tree_split_cmp(const void *l, const void *r) |
308 | { | |
309 | struct ceph_frag_tree_split *ls = (struct ceph_frag_tree_split*)l; | |
310 | struct ceph_frag_tree_split *rs = (struct ceph_frag_tree_split*)r; | |
311 | return ceph_frag_compare(ls->frag, rs->frag); | |
312 | } | |
313 | ||
a4b7431f YZ |
314 | static bool is_frag_child(u32 f, struct ceph_inode_frag *frag) |
315 | { | |
316 | if (!frag) | |
317 | return f == ceph_frag_make(0, 0); | |
318 | if (ceph_frag_bits(f) != ceph_frag_bits(frag->frag) + frag->split_by) | |
319 | return false; | |
320 | return ceph_frag_contains_value(frag->frag, ceph_frag_value(f)); | |
321 | } | |
322 | ||
3e7fbe9c YZ |
323 | static int ceph_fill_fragtree(struct inode *inode, |
324 | struct ceph_frag_tree_head *fragtree, | |
325 | struct ceph_mds_reply_dirfrag *dirinfo) | |
326 | { | |
327 | struct ceph_inode_info *ci = ceph_inode(inode); | |
a4b7431f | 328 | struct ceph_inode_frag *frag, *prev_frag = NULL; |
3e7fbe9c | 329 | struct rb_node *rb_node; |
1b1bc16d YZ |
330 | unsigned i, split_by, nsplits; |
331 | u32 id; | |
3e7fbe9c YZ |
332 | bool update = false; |
333 | ||
334 | mutex_lock(&ci->i_fragtree_mutex); | |
335 | nsplits = le32_to_cpu(fragtree->nsplits); | |
1b1bc16d YZ |
336 | if (nsplits != ci->i_fragtree_nsplits) { |
337 | update = true; | |
338 | } else if (nsplits) { | |
3e7fbe9c YZ |
339 | i = prandom_u32() % nsplits; |
340 | id = le32_to_cpu(fragtree->splits[i].frag); | |
341 | if (!__ceph_find_frag(ci, id)) | |
342 | update = true; | |
343 | } else if (!RB_EMPTY_ROOT(&ci->i_fragtree)) { | |
344 | rb_node = rb_first(&ci->i_fragtree); | |
345 | frag = rb_entry(rb_node, struct ceph_inode_frag, node); | |
346 | if (frag->frag != ceph_frag_make(0, 0) || rb_next(rb_node)) | |
347 | update = true; | |
348 | } | |
349 | if (!update && dirinfo) { | |
350 | id = le32_to_cpu(dirinfo->frag); | |
351 | if (id != __ceph_choose_frag(ci, id, NULL, NULL)) | |
352 | update = true; | |
353 | } | |
354 | if (!update) | |
355 | goto out_unlock; | |
356 | ||
a407846e YZ |
357 | if (nsplits > 1) { |
358 | sort(fragtree->splits, nsplits, sizeof(fragtree->splits[0]), | |
359 | frag_tree_split_cmp, NULL); | |
360 | } | |
361 | ||
3e7fbe9c YZ |
362 | dout("fill_fragtree %llx.%llx\n", ceph_vinop(inode)); |
363 | rb_node = rb_first(&ci->i_fragtree); | |
364 | for (i = 0; i < nsplits; i++) { | |
365 | id = le32_to_cpu(fragtree->splits[i].frag); | |
1b1bc16d YZ |
366 | split_by = le32_to_cpu(fragtree->splits[i].by); |
367 | if (split_by == 0 || ceph_frag_bits(id) + split_by > 24) { | |
368 | pr_err("fill_fragtree %llx.%llx invalid split %d/%u, " | |
369 | "frag %x split by %d\n", ceph_vinop(inode), | |
370 | i, nsplits, id, split_by); | |
371 | continue; | |
372 | } | |
3e7fbe9c YZ |
373 | frag = NULL; |
374 | while (rb_node) { | |
375 | frag = rb_entry(rb_node, struct ceph_inode_frag, node); | |
376 | if (ceph_frag_compare(frag->frag, id) >= 0) { | |
377 | if (frag->frag != id) | |
378 | frag = NULL; | |
379 | else | |
380 | rb_node = rb_next(rb_node); | |
381 | break; | |
382 | } | |
383 | rb_node = rb_next(rb_node); | |
a4b7431f YZ |
384 | /* delete stale split/leaf node */ |
385 | if (frag->split_by > 0 || | |
386 | !is_frag_child(frag->frag, prev_frag)) { | |
387 | rb_erase(&frag->node, &ci->i_fragtree); | |
1b1bc16d YZ |
388 | if (frag->split_by > 0) |
389 | ci->i_fragtree_nsplits--; | |
a4b7431f YZ |
390 | kfree(frag); |
391 | } | |
3e7fbe9c YZ |
392 | frag = NULL; |
393 | } | |
394 | if (!frag) { | |
395 | frag = __get_or_create_frag(ci, id); | |
396 | if (IS_ERR(frag)) | |
397 | continue; | |
398 | } | |
1b1bc16d YZ |
399 | if (frag->split_by == 0) |
400 | ci->i_fragtree_nsplits++; | |
401 | frag->split_by = split_by; | |
3e7fbe9c | 402 | dout(" frag %x split by %d\n", frag->frag, frag->split_by); |
a4b7431f | 403 | prev_frag = frag; |
3e7fbe9c YZ |
404 | } |
405 | while (rb_node) { | |
406 | frag = rb_entry(rb_node, struct ceph_inode_frag, node); | |
407 | rb_node = rb_next(rb_node); | |
a4b7431f YZ |
408 | /* delete stale split/leaf node */ |
409 | if (frag->split_by > 0 || | |
410 | !is_frag_child(frag->frag, prev_frag)) { | |
411 | rb_erase(&frag->node, &ci->i_fragtree); | |
1b1bc16d YZ |
412 | if (frag->split_by > 0) |
413 | ci->i_fragtree_nsplits--; | |
a4b7431f YZ |
414 | kfree(frag); |
415 | } | |
3e7fbe9c YZ |
416 | } |
417 | out_unlock: | |
418 | mutex_unlock(&ci->i_fragtree_mutex); | |
419 | return 0; | |
420 | } | |
355da1eb SW |
421 | |
422 | /* | |
423 | * initialize a newly allocated inode. | |
424 | */ | |
425 | struct inode *ceph_alloc_inode(struct super_block *sb) | |
426 | { | |
427 | struct ceph_inode_info *ci; | |
428 | int i; | |
429 | ||
430 | ci = kmem_cache_alloc(ceph_inode_cachep, GFP_NOFS); | |
431 | if (!ci) | |
432 | return NULL; | |
433 | ||
434 | dout("alloc_inode %p\n", &ci->vfs_inode); | |
435 | ||
be655596 SW |
436 | spin_lock_init(&ci->i_ceph_lock); |
437 | ||
355da1eb | 438 | ci->i_version = 0; |
31c542a1 | 439 | ci->i_inline_version = 0; |
355da1eb SW |
440 | ci->i_time_warp_seq = 0; |
441 | ci->i_ceph_flags = 0; | |
fdd4e158 YZ |
442 | atomic64_set(&ci->i_ordered_count, 1); |
443 | atomic64_set(&ci->i_release_count, 1); | |
444 | atomic64_set(&ci->i_complete_seq[0], 0); | |
445 | atomic64_set(&ci->i_complete_seq[1], 0); | |
355da1eb SW |
446 | ci->i_symlink = NULL; |
447 | ||
6c0f3af7 | 448 | memset(&ci->i_dir_layout, 0, sizeof(ci->i_dir_layout)); |
30c156d9 | 449 | RCU_INIT_POINTER(ci->i_layout.pool_ns, NULL); |
6c0f3af7 | 450 | |
355da1eb SW |
451 | ci->i_fragtree = RB_ROOT; |
452 | mutex_init(&ci->i_fragtree_mutex); | |
453 | ||
454 | ci->i_xattrs.blob = NULL; | |
455 | ci->i_xattrs.prealloc_blob = NULL; | |
456 | ci->i_xattrs.dirty = false; | |
457 | ci->i_xattrs.index = RB_ROOT; | |
458 | ci->i_xattrs.count = 0; | |
459 | ci->i_xattrs.names_size = 0; | |
460 | ci->i_xattrs.vals_size = 0; | |
461 | ci->i_xattrs.version = 0; | |
462 | ci->i_xattrs.index_version = 0; | |
463 | ||
464 | ci->i_caps = RB_ROOT; | |
465 | ci->i_auth_cap = NULL; | |
466 | ci->i_dirty_caps = 0; | |
467 | ci->i_flushing_caps = 0; | |
468 | INIT_LIST_HEAD(&ci->i_dirty_item); | |
469 | INIT_LIST_HEAD(&ci->i_flushing_item); | |
f66fd9f0 | 470 | ci->i_prealloc_cap_flush = NULL; |
553adfd9 | 471 | ci->i_cap_flush_tree = RB_ROOT; |
355da1eb SW |
472 | init_waitqueue_head(&ci->i_cap_wq); |
473 | ci->i_hold_caps_min = 0; | |
474 | ci->i_hold_caps_max = 0; | |
475 | INIT_LIST_HEAD(&ci->i_cap_delay_list); | |
355da1eb SW |
476 | INIT_LIST_HEAD(&ci->i_cap_snaps); |
477 | ci->i_head_snapc = NULL; | |
478 | ci->i_snap_caps = 0; | |
479 | ||
480 | for (i = 0; i < CEPH_FILE_MODE_NUM; i++) | |
481 | ci->i_nr_by_mode[i] = 0; | |
482 | ||
b0d7c223 | 483 | mutex_init(&ci->i_truncate_mutex); |
355da1eb SW |
484 | ci->i_truncate_seq = 0; |
485 | ci->i_truncate_size = 0; | |
486 | ci->i_truncate_pending = 0; | |
487 | ||
488 | ci->i_max_size = 0; | |
489 | ci->i_reported_size = 0; | |
490 | ci->i_wanted_max_size = 0; | |
491 | ci->i_requested_max_size = 0; | |
492 | ||
493 | ci->i_pin_ref = 0; | |
494 | ci->i_rd_ref = 0; | |
495 | ci->i_rdcache_ref = 0; | |
496 | ci->i_wr_ref = 0; | |
d3d0720d | 497 | ci->i_wb_ref = 0; |
355da1eb SW |
498 | ci->i_wrbuffer_ref = 0; |
499 | ci->i_wrbuffer_ref_head = 0; | |
500 | ci->i_shared_gen = 0; | |
501 | ci->i_rdcache_gen = 0; | |
502 | ci->i_rdcache_revoking = 0; | |
503 | ||
504 | INIT_LIST_HEAD(&ci->i_unsafe_writes); | |
505 | INIT_LIST_HEAD(&ci->i_unsafe_dirops); | |
68cd5b4b | 506 | INIT_LIST_HEAD(&ci->i_unsafe_iops); |
355da1eb SW |
507 | spin_lock_init(&ci->i_unsafe_lock); |
508 | ||
509 | ci->i_snap_realm = NULL; | |
510 | INIT_LIST_HEAD(&ci->i_snap_realm_item); | |
511 | INIT_LIST_HEAD(&ci->i_snap_flush_item); | |
512 | ||
3c6f6b79 SW |
513 | INIT_WORK(&ci->i_wb_work, ceph_writeback_work); |
514 | INIT_WORK(&ci->i_pg_inv_work, ceph_invalidate_work); | |
355da1eb SW |
515 | |
516 | INIT_WORK(&ci->i_vmtruncate_work, ceph_vmtruncate_work); | |
517 | ||
99ccbd22 MT |
518 | ceph_fscache_inode_init(ci); |
519 | ||
355da1eb SW |
520 | return &ci->vfs_inode; |
521 | } | |
522 | ||
fa0d7e3d NP |
523 | static void ceph_i_callback(struct rcu_head *head) |
524 | { | |
525 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
526 | struct ceph_inode_info *ci = ceph_inode(inode); | |
527 | ||
fa0d7e3d NP |
528 | kmem_cache_free(ceph_inode_cachep, ci); |
529 | } | |
530 | ||
355da1eb SW |
531 | void ceph_destroy_inode(struct inode *inode) |
532 | { | |
533 | struct ceph_inode_info *ci = ceph_inode(inode); | |
534 | struct ceph_inode_frag *frag; | |
535 | struct rb_node *n; | |
536 | ||
537 | dout("destroy_inode %p ino %llx.%llx\n", inode, ceph_vinop(inode)); | |
538 | ||
99ccbd22 MT |
539 | ceph_fscache_unregister_inode_cookie(ci); |
540 | ||
355da1eb SW |
541 | ceph_queue_caps_release(inode); |
542 | ||
8b218b8a SW |
543 | /* |
544 | * we may still have a snap_realm reference if there are stray | |
d9df2783 | 545 | * caps in i_snap_caps. |
8b218b8a SW |
546 | */ |
547 | if (ci->i_snap_realm) { | |
548 | struct ceph_mds_client *mdsc = | |
3d14c5d2 | 549 | ceph_sb_to_client(ci->vfs_inode.i_sb)->mdsc; |
8b218b8a SW |
550 | struct ceph_snap_realm *realm = ci->i_snap_realm; |
551 | ||
552 | dout(" dropping residual ref to snap realm %p\n", realm); | |
553 | spin_lock(&realm->inodes_with_caps_lock); | |
554 | list_del_init(&ci->i_snap_realm_item); | |
555 | spin_unlock(&realm->inodes_with_caps_lock); | |
556 | ceph_put_snap_realm(mdsc, realm); | |
557 | } | |
558 | ||
355da1eb SW |
559 | kfree(ci->i_symlink); |
560 | while ((n = rb_first(&ci->i_fragtree)) != NULL) { | |
561 | frag = rb_entry(n, struct ceph_inode_frag, node); | |
562 | rb_erase(n, &ci->i_fragtree); | |
563 | kfree(frag); | |
564 | } | |
1b1bc16d | 565 | ci->i_fragtree_nsplits = 0; |
355da1eb SW |
566 | |
567 | __ceph_destroy_xattrs(ci); | |
b6c1d5b8 SW |
568 | if (ci->i_xattrs.blob) |
569 | ceph_buffer_put(ci->i_xattrs.blob); | |
570 | if (ci->i_xattrs.prealloc_blob) | |
571 | ceph_buffer_put(ci->i_xattrs.prealloc_blob); | |
355da1eb | 572 | |
779fe0fb | 573 | ceph_put_string(rcu_dereference_raw(ci->i_layout.pool_ns)); |
30c156d9 | 574 | |
fa0d7e3d | 575 | call_rcu(&inode->i_rcu, ceph_i_callback); |
355da1eb SW |
576 | } |
577 | ||
9f12bd11 YZ |
578 | int ceph_drop_inode(struct inode *inode) |
579 | { | |
580 | /* | |
581 | * Positve dentry and corresponding inode are always accompanied | |
582 | * in MDS reply. So no need to keep inode in the cache after | |
583 | * dropping all its aliases. | |
584 | */ | |
585 | return 1; | |
586 | } | |
587 | ||
224a7542 YZ |
588 | static inline blkcnt_t calc_inode_blocks(u64 size) |
589 | { | |
590 | return (size + (1<<9) - 1) >> 9; | |
591 | } | |
592 | ||
355da1eb SW |
593 | /* |
594 | * Helpers to fill in size, ctime, mtime, and atime. We have to be | |
595 | * careful because either the client or MDS may have more up to date | |
596 | * info, depending on which capabilities are held, and whether | |
597 | * time_warp_seq or truncate_seq have increased. (Ordinarily, mtime | |
598 | * and size are monotonically increasing, except when utimes() or | |
599 | * truncate() increments the corresponding _seq values.) | |
600 | */ | |
601 | int ceph_fill_file_size(struct inode *inode, int issued, | |
602 | u32 truncate_seq, u64 truncate_size, u64 size) | |
603 | { | |
604 | struct ceph_inode_info *ci = ceph_inode(inode); | |
605 | int queue_trunc = 0; | |
606 | ||
607 | if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) > 0 || | |
608 | (truncate_seq == ci->i_truncate_seq && size > inode->i_size)) { | |
609 | dout("size %lld -> %llu\n", inode->i_size, size); | |
a3d714c3 YZ |
610 | if (size > 0 && S_ISDIR(inode->i_mode)) { |
611 | pr_err("fill_file_size non-zero size for directory\n"); | |
612 | size = 0; | |
613 | } | |
99c88e69 | 614 | i_size_write(inode, size); |
224a7542 | 615 | inode->i_blocks = calc_inode_blocks(size); |
355da1eb SW |
616 | ci->i_reported_size = size; |
617 | if (truncate_seq != ci->i_truncate_seq) { | |
618 | dout("truncate_seq %u -> %u\n", | |
619 | ci->i_truncate_seq, truncate_seq); | |
620 | ci->i_truncate_seq = truncate_seq; | |
b0d7c223 YZ |
621 | |
622 | /* the MDS should have revoked these caps */ | |
623 | WARN_ON_ONCE(issued & (CEPH_CAP_FILE_EXCL | | |
624 | CEPH_CAP_FILE_RD | | |
625 | CEPH_CAP_FILE_WR | | |
626 | CEPH_CAP_FILE_LAZYIO)); | |
3d497d85 YS |
627 | /* |
628 | * If we hold relevant caps, or in the case where we're | |
629 | * not the only client referencing this file and we | |
630 | * don't hold those caps, then we need to check whether | |
631 | * the file is either opened or mmaped | |
632 | */ | |
b0d7c223 YZ |
633 | if ((issued & (CEPH_CAP_FILE_CACHE| |
634 | CEPH_CAP_FILE_BUFFER)) || | |
3d497d85 YS |
635 | mapping_mapped(inode->i_mapping) || |
636 | __ceph_caps_file_wanted(ci)) { | |
355da1eb SW |
637 | ci->i_truncate_pending++; |
638 | queue_trunc = 1; | |
639 | } | |
640 | } | |
641 | } | |
642 | if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) >= 0 && | |
643 | ci->i_truncate_size != truncate_size) { | |
644 | dout("truncate_size %lld -> %llu\n", ci->i_truncate_size, | |
645 | truncate_size); | |
646 | ci->i_truncate_size = truncate_size; | |
647 | } | |
99ccbd22 MT |
648 | |
649 | if (queue_trunc) | |
650 | ceph_fscache_invalidate(inode); | |
651 | ||
355da1eb SW |
652 | return queue_trunc; |
653 | } | |
654 | ||
655 | void ceph_fill_file_time(struct inode *inode, int issued, | |
656 | u64 time_warp_seq, struct timespec *ctime, | |
657 | struct timespec *mtime, struct timespec *atime) | |
658 | { | |
659 | struct ceph_inode_info *ci = ceph_inode(inode); | |
660 | int warn = 0; | |
661 | ||
662 | if (issued & (CEPH_CAP_FILE_EXCL| | |
663 | CEPH_CAP_FILE_WR| | |
d8672d64 SW |
664 | CEPH_CAP_FILE_BUFFER| |
665 | CEPH_CAP_AUTH_EXCL| | |
666 | CEPH_CAP_XATTR_EXCL)) { | |
355da1eb SW |
667 | if (timespec_compare(ctime, &inode->i_ctime) > 0) { |
668 | dout("ctime %ld.%09ld -> %ld.%09ld inc w/ cap\n", | |
669 | inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec, | |
670 | ctime->tv_sec, ctime->tv_nsec); | |
671 | inode->i_ctime = *ctime; | |
672 | } | |
673 | if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) > 0) { | |
674 | /* the MDS did a utimes() */ | |
675 | dout("mtime %ld.%09ld -> %ld.%09ld " | |
676 | "tw %d -> %d\n", | |
677 | inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec, | |
678 | mtime->tv_sec, mtime->tv_nsec, | |
679 | ci->i_time_warp_seq, (int)time_warp_seq); | |
680 | ||
681 | inode->i_mtime = *mtime; | |
682 | inode->i_atime = *atime; | |
683 | ci->i_time_warp_seq = time_warp_seq; | |
684 | } else if (time_warp_seq == ci->i_time_warp_seq) { | |
685 | /* nobody did utimes(); take the max */ | |
686 | if (timespec_compare(mtime, &inode->i_mtime) > 0) { | |
687 | dout("mtime %ld.%09ld -> %ld.%09ld inc\n", | |
688 | inode->i_mtime.tv_sec, | |
689 | inode->i_mtime.tv_nsec, | |
690 | mtime->tv_sec, mtime->tv_nsec); | |
691 | inode->i_mtime = *mtime; | |
692 | } | |
693 | if (timespec_compare(atime, &inode->i_atime) > 0) { | |
694 | dout("atime %ld.%09ld -> %ld.%09ld inc\n", | |
695 | inode->i_atime.tv_sec, | |
696 | inode->i_atime.tv_nsec, | |
697 | atime->tv_sec, atime->tv_nsec); | |
698 | inode->i_atime = *atime; | |
699 | } | |
700 | } else if (issued & CEPH_CAP_FILE_EXCL) { | |
701 | /* we did a utimes(); ignore mds values */ | |
702 | } else { | |
703 | warn = 1; | |
704 | } | |
705 | } else { | |
d8672d64 | 706 | /* we have no write|excl caps; whatever the MDS says is true */ |
355da1eb SW |
707 | if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) >= 0) { |
708 | inode->i_ctime = *ctime; | |
709 | inode->i_mtime = *mtime; | |
710 | inode->i_atime = *atime; | |
711 | ci->i_time_warp_seq = time_warp_seq; | |
712 | } else { | |
713 | warn = 1; | |
714 | } | |
715 | } | |
716 | if (warn) /* time_warp_seq shouldn't go backwards */ | |
717 | dout("%p mds time_warp_seq %llu < %u\n", | |
718 | inode, time_warp_seq, ci->i_time_warp_seq); | |
719 | } | |
720 | ||
721 | /* | |
722 | * Populate an inode based on info from mds. May be called on new or | |
723 | * existing inodes. | |
724 | */ | |
01deead0 | 725 | static int fill_inode(struct inode *inode, struct page *locked_page, |
355da1eb SW |
726 | struct ceph_mds_reply_info_in *iinfo, |
727 | struct ceph_mds_reply_dirfrag *dirinfo, | |
728 | struct ceph_mds_session *session, | |
729 | unsigned long ttl_from, int cap_fmode, | |
730 | struct ceph_cap_reservation *caps_reservation) | |
731 | { | |
d9df2783 | 732 | struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc; |
355da1eb SW |
733 | struct ceph_mds_reply_inode *info = iinfo->in; |
734 | struct ceph_inode_info *ci = ceph_inode(inode); | |
f98a128a | 735 | int issued = 0, implemented, new_issued; |
355da1eb | 736 | struct timespec mtime, atime, ctime; |
355da1eb | 737 | struct ceph_buffer *xattr_blob = NULL; |
779fe0fb | 738 | struct ceph_string *pool_ns = NULL; |
d9df2783 | 739 | struct ceph_cap *new_cap = NULL; |
355da1eb | 740 | int err = 0; |
d9df2783 | 741 | bool wake = false; |
f98a128a YZ |
742 | bool queue_trunc = false; |
743 | bool new_version = false; | |
31c542a1 | 744 | bool fill_inline = false; |
355da1eb SW |
745 | |
746 | dout("fill_inode %p ino %llx.%llx v %llu had %llu\n", | |
747 | inode, ceph_vinop(inode), le64_to_cpu(info->version), | |
748 | ci->i_version); | |
749 | ||
d9df2783 YZ |
750 | /* prealloc new cap struct */ |
751 | if (info->cap.caps && ceph_snap(inode) == CEPH_NOSNAP) | |
752 | new_cap = ceph_get_cap(mdsc, caps_reservation); | |
753 | ||
355da1eb SW |
754 | /* |
755 | * prealloc xattr data, if it looks like we'll need it. only | |
756 | * if len > 4 (meaning there are actually xattrs; the first 4 | |
757 | * bytes are the xattr count). | |
758 | */ | |
759 | if (iinfo->xattr_len > 4) { | |
b6c1d5b8 | 760 | xattr_blob = ceph_buffer_new(iinfo->xattr_len, GFP_NOFS); |
355da1eb SW |
761 | if (!xattr_blob) |
762 | pr_err("fill_inode ENOMEM xattr blob %d bytes\n", | |
763 | iinfo->xattr_len); | |
764 | } | |
765 | ||
779fe0fb YZ |
766 | if (iinfo->pool_ns_len > 0) |
767 | pool_ns = ceph_find_or_create_string(iinfo->pool_ns_data, | |
768 | iinfo->pool_ns_len); | |
769 | ||
be655596 | 770 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
771 | |
772 | /* | |
773 | * provided version will be odd if inode value is projected, | |
8bd59e01 SW |
774 | * even if stable. skip the update if we have newer stable |
775 | * info (ours>=theirs, e.g. due to racing mds replies), unless | |
776 | * we are getting projected (unstable) info (in which case the | |
777 | * version is odd, and we want ours>theirs). | |
778 | * us them | |
779 | * 2 2 skip | |
780 | * 3 2 skip | |
781 | * 3 3 update | |
355da1eb | 782 | */ |
f98a128a YZ |
783 | if (ci->i_version == 0 || |
784 | ((info->cap.flags & CEPH_CAP_FLAG_AUTH) && | |
785 | le64_to_cpu(info->version) > (ci->i_version & ~1))) | |
786 | new_version = true; | |
787 | ||
355da1eb SW |
788 | issued = __ceph_caps_issued(ci, &implemented); |
789 | issued |= implemented | __ceph_caps_dirty(ci); | |
f98a128a | 790 | new_issued = ~issued & le32_to_cpu(info->cap.caps); |
355da1eb SW |
791 | |
792 | /* update inode */ | |
793 | ci->i_version = le64_to_cpu(info->version); | |
794 | inode->i_version++; | |
795 | inode->i_rdev = le32_to_cpu(info->rdev); | |
f98a128a | 796 | inode->i_blkbits = fls(le32_to_cpu(info->layout.fl_stripe_unit)) - 1; |
355da1eb | 797 | |
f98a128a YZ |
798 | if ((new_version || (new_issued & CEPH_CAP_AUTH_SHARED)) && |
799 | (issued & CEPH_CAP_AUTH_EXCL) == 0) { | |
355da1eb | 800 | inode->i_mode = le32_to_cpu(info->mode); |
ab871b90 EB |
801 | inode->i_uid = make_kuid(&init_user_ns, le32_to_cpu(info->uid)); |
802 | inode->i_gid = make_kgid(&init_user_ns, le32_to_cpu(info->gid)); | |
355da1eb | 803 | dout("%p mode 0%o uid.gid %d.%d\n", inode, inode->i_mode, |
bd2bae6a EB |
804 | from_kuid(&init_user_ns, inode->i_uid), |
805 | from_kgid(&init_user_ns, inode->i_gid)); | |
355da1eb SW |
806 | } |
807 | ||
f98a128a YZ |
808 | if ((new_version || (new_issued & CEPH_CAP_LINK_SHARED)) && |
809 | (issued & CEPH_CAP_LINK_EXCL) == 0) | |
bfe86848 | 810 | set_nlink(inode, le32_to_cpu(info->nlink)); |
355da1eb | 811 | |
f98a128a YZ |
812 | if (new_version || (new_issued & CEPH_CAP_ANY_RD)) { |
813 | /* be careful with mtime, atime, size */ | |
814 | ceph_decode_timespec(&atime, &info->atime); | |
815 | ceph_decode_timespec(&mtime, &info->mtime); | |
816 | ceph_decode_timespec(&ctime, &info->ctime); | |
817 | ceph_fill_file_time(inode, issued, | |
818 | le32_to_cpu(info->time_warp_seq), | |
819 | &ctime, &mtime, &atime); | |
820 | } | |
821 | ||
822 | if (new_version || | |
823 | (new_issued & (CEPH_CAP_ANY_FILE_RD | CEPH_CAP_ANY_FILE_WR))) { | |
7627151e | 824 | s64 old_pool = ci->i_layout.pool_id; |
779fe0fb YZ |
825 | struct ceph_string *old_ns; |
826 | ||
7627151e | 827 | ceph_file_layout_from_legacy(&ci->i_layout, &info->layout); |
779fe0fb YZ |
828 | old_ns = rcu_dereference_protected(ci->i_layout.pool_ns, |
829 | lockdep_is_held(&ci->i_ceph_lock)); | |
830 | rcu_assign_pointer(ci->i_layout.pool_ns, pool_ns); | |
831 | ||
832 | if (ci->i_layout.pool_id != old_pool || pool_ns != old_ns) | |
7627151e | 833 | ci->i_ceph_flags &= ~CEPH_I_POOL_PERM; |
10183a69 | 834 | |
779fe0fb YZ |
835 | pool_ns = old_ns; |
836 | ||
f98a128a YZ |
837 | queue_trunc = ceph_fill_file_size(inode, issued, |
838 | le32_to_cpu(info->truncate_seq), | |
839 | le64_to_cpu(info->truncate_size), | |
840 | le64_to_cpu(info->size)); | |
841 | /* only update max_size on auth cap */ | |
842 | if ((info->cap.flags & CEPH_CAP_FLAG_AUTH) && | |
843 | ci->i_max_size != le64_to_cpu(info->max_size)) { | |
844 | dout("max_size %lld -> %llu\n", ci->i_max_size, | |
845 | le64_to_cpu(info->max_size)); | |
846 | ci->i_max_size = le64_to_cpu(info->max_size); | |
847 | } | |
848 | } | |
355da1eb SW |
849 | |
850 | /* xattrs */ | |
851 | /* note that if i_xattrs.len <= 4, i_xattrs.data will still be NULL. */ | |
508b32d8 | 852 | if ((ci->i_xattrs.version == 0 || !(issued & CEPH_CAP_XATTR_EXCL)) && |
355da1eb SW |
853 | le64_to_cpu(info->xattr_version) > ci->i_xattrs.version) { |
854 | if (ci->i_xattrs.blob) | |
855 | ceph_buffer_put(ci->i_xattrs.blob); | |
856 | ci->i_xattrs.blob = xattr_blob; | |
857 | if (xattr_blob) | |
858 | memcpy(ci->i_xattrs.blob->vec.iov_base, | |
859 | iinfo->xattr_data, iinfo->xattr_len); | |
860 | ci->i_xattrs.version = le64_to_cpu(info->xattr_version); | |
7221fe4c | 861 | ceph_forget_all_cached_acls(inode); |
a6424e48 | 862 | xattr_blob = NULL; |
355da1eb SW |
863 | } |
864 | ||
865 | inode->i_mapping->a_ops = &ceph_aops; | |
355da1eb SW |
866 | |
867 | switch (inode->i_mode & S_IFMT) { | |
868 | case S_IFIFO: | |
869 | case S_IFBLK: | |
870 | case S_IFCHR: | |
871 | case S_IFSOCK: | |
872 | init_special_inode(inode, inode->i_mode, inode->i_rdev); | |
873 | inode->i_op = &ceph_file_iops; | |
874 | break; | |
875 | case S_IFREG: | |
876 | inode->i_op = &ceph_file_iops; | |
877 | inode->i_fop = &ceph_file_fops; | |
878 | break; | |
879 | case S_IFLNK: | |
880 | inode->i_op = &ceph_symlink_iops; | |
881 | if (!ci->i_symlink) { | |
810339ec | 882 | u32 symlen = iinfo->symlink_len; |
355da1eb SW |
883 | char *sym; |
884 | ||
be655596 | 885 | spin_unlock(&ci->i_ceph_lock); |
355da1eb | 886 | |
224a7542 YZ |
887 | if (symlen != i_size_read(inode)) { |
888 | pr_err("fill_inode %llx.%llx BAD symlink " | |
889 | "size %lld\n", ceph_vinop(inode), | |
890 | i_size_read(inode)); | |
891 | i_size_write(inode, symlen); | |
892 | inode->i_blocks = calc_inode_blocks(symlen); | |
893 | } | |
810339ec | 894 | |
355da1eb | 895 | err = -ENOMEM; |
810339ec | 896 | sym = kstrndup(iinfo->symlink, symlen, GFP_NOFS); |
355da1eb SW |
897 | if (!sym) |
898 | goto out; | |
355da1eb | 899 | |
be655596 | 900 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
901 | if (!ci->i_symlink) |
902 | ci->i_symlink = sym; | |
903 | else | |
904 | kfree(sym); /* lost a race */ | |
905 | } | |
ac194dcc | 906 | inode->i_link = ci->i_symlink; |
355da1eb SW |
907 | break; |
908 | case S_IFDIR: | |
909 | inode->i_op = &ceph_dir_iops; | |
910 | inode->i_fop = &ceph_dir_fops; | |
911 | ||
14303d20 SW |
912 | ci->i_dir_layout = iinfo->dir_layout; |
913 | ||
355da1eb SW |
914 | ci->i_files = le64_to_cpu(info->files); |
915 | ci->i_subdirs = le64_to_cpu(info->subdirs); | |
916 | ci->i_rbytes = le64_to_cpu(info->rbytes); | |
917 | ci->i_rfiles = le64_to_cpu(info->rfiles); | |
918 | ci->i_rsubdirs = le64_to_cpu(info->rsubdirs); | |
919 | ceph_decode_timespec(&ci->i_rctime, &info->rctime); | |
355da1eb SW |
920 | break; |
921 | default: | |
922 | pr_err("fill_inode %llx.%llx BAD mode 0%o\n", | |
923 | ceph_vinop(inode), inode->i_mode); | |
924 | } | |
925 | ||
355da1eb SW |
926 | /* were we issued a capability? */ |
927 | if (info->cap.caps) { | |
928 | if (ceph_snap(inode) == CEPH_NOSNAP) { | |
2f92b3d0 | 929 | unsigned caps = le32_to_cpu(info->cap.caps); |
355da1eb SW |
930 | ceph_add_cap(inode, session, |
931 | le64_to_cpu(info->cap.cap_id), | |
2f92b3d0 | 932 | cap_fmode, caps, |
355da1eb SW |
933 | le32_to_cpu(info->cap.wanted), |
934 | le32_to_cpu(info->cap.seq), | |
935 | le32_to_cpu(info->cap.mseq), | |
936 | le64_to_cpu(info->cap.realm), | |
d9df2783 | 937 | info->cap.flags, &new_cap); |
2f92b3d0 YZ |
938 | |
939 | /* set dir completion flag? */ | |
940 | if (S_ISDIR(inode->i_mode) && | |
941 | ci->i_files == 0 && ci->i_subdirs == 0 && | |
942 | (caps & CEPH_CAP_FILE_SHARED) && | |
943 | (issued & CEPH_CAP_FILE_EXCL) == 0 && | |
944 | !__ceph_dir_is_complete(ci)) { | |
945 | dout(" marking %p complete (empty)\n", inode); | |
fdd4e158 | 946 | i_size_write(inode, 0); |
2f92b3d0 | 947 | __ceph_dir_set_complete(ci, |
fdd4e158 YZ |
948 | atomic64_read(&ci->i_release_count), |
949 | atomic64_read(&ci->i_ordered_count)); | |
2f92b3d0 YZ |
950 | } |
951 | ||
d9df2783 | 952 | wake = true; |
355da1eb | 953 | } else { |
355da1eb SW |
954 | dout(" %p got snap_caps %s\n", inode, |
955 | ceph_cap_string(le32_to_cpu(info->cap.caps))); | |
956 | ci->i_snap_caps |= le32_to_cpu(info->cap.caps); | |
957 | if (cap_fmode >= 0) | |
958 | __ceph_get_fmode(ci, cap_fmode); | |
355da1eb | 959 | } |
04d000eb | 960 | } else if (cap_fmode >= 0) { |
f3ae1b97 | 961 | pr_warn("mds issued no caps on %llx.%llx\n", |
04d000eb SW |
962 | ceph_vinop(inode)); |
963 | __ceph_get_fmode(ci, cap_fmode); | |
355da1eb | 964 | } |
31c542a1 YZ |
965 | |
966 | if (iinfo->inline_version > 0 && | |
967 | iinfo->inline_version >= ci->i_inline_version) { | |
968 | int cache_caps = CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO; | |
969 | ci->i_inline_version = iinfo->inline_version; | |
970 | if (ci->i_inline_version != CEPH_INLINE_NONE && | |
01deead0 YZ |
971 | (locked_page || |
972 | (le32_to_cpu(info->cap.caps) & cache_caps))) | |
31c542a1 YZ |
973 | fill_inline = true; |
974 | } | |
975 | ||
be655596 | 976 | spin_unlock(&ci->i_ceph_lock); |
355da1eb | 977 | |
31c542a1 | 978 | if (fill_inline) |
01deead0 | 979 | ceph_fill_inline_data(inode, locked_page, |
31c542a1 YZ |
980 | iinfo->inline_data, iinfo->inline_len); |
981 | ||
d9df2783 YZ |
982 | if (wake) |
983 | wake_up_all(&ci->i_cap_wq); | |
984 | ||
355da1eb SW |
985 | /* queue truncate if we saw i_size decrease */ |
986 | if (queue_trunc) | |
3c6f6b79 | 987 | ceph_queue_vmtruncate(inode); |
355da1eb SW |
988 | |
989 | /* populate frag tree */ | |
3e7fbe9c YZ |
990 | if (S_ISDIR(inode->i_mode)) |
991 | ceph_fill_fragtree(inode, &info->fragtree, dirinfo); | |
355da1eb SW |
992 | |
993 | /* update delegation info? */ | |
994 | if (dirinfo) | |
995 | ceph_fill_dirfrag(inode, dirinfo); | |
996 | ||
997 | err = 0; | |
355da1eb | 998 | out: |
d9df2783 YZ |
999 | if (new_cap) |
1000 | ceph_put_cap(mdsc, new_cap); | |
b6c1d5b8 SW |
1001 | if (xattr_blob) |
1002 | ceph_buffer_put(xattr_blob); | |
779fe0fb | 1003 | ceph_put_string(pool_ns); |
355da1eb SW |
1004 | return err; |
1005 | } | |
1006 | ||
1007 | /* | |
1008 | * caller should hold session s_mutex. | |
1009 | */ | |
1010 | static void update_dentry_lease(struct dentry *dentry, | |
1011 | struct ceph_mds_reply_lease *lease, | |
1012 | struct ceph_mds_session *session, | |
1013 | unsigned long from_time) | |
1014 | { | |
1015 | struct ceph_dentry_info *di = ceph_dentry(dentry); | |
1016 | long unsigned duration = le32_to_cpu(lease->duration_ms); | |
1017 | long unsigned ttl = from_time + (duration * HZ) / 1000; | |
1018 | long unsigned half_ttl = from_time + (duration * HZ / 2) / 1000; | |
1019 | struct inode *dir; | |
1020 | ||
1021 | /* only track leases on regular dentries */ | |
1022 | if (dentry->d_op != &ceph_dentry_ops) | |
1023 | return; | |
1024 | ||
1025 | spin_lock(&dentry->d_lock); | |
2f90b852 SW |
1026 | dout("update_dentry_lease %p duration %lu ms ttl %lu\n", |
1027 | dentry, duration, ttl); | |
355da1eb SW |
1028 | |
1029 | /* make lease_rdcache_gen match directory */ | |
2b0143b5 | 1030 | dir = d_inode(dentry->d_parent); |
355da1eb SW |
1031 | di->lease_shared_gen = ceph_inode(dir)->i_shared_gen; |
1032 | ||
2f90b852 | 1033 | if (duration == 0) |
355da1eb SW |
1034 | goto out_unlock; |
1035 | ||
1036 | if (di->lease_gen == session->s_cap_gen && | |
1037 | time_before(ttl, dentry->d_time)) | |
1038 | goto out_unlock; /* we already have a newer lease. */ | |
1039 | ||
1040 | if (di->lease_session && di->lease_session != session) | |
1041 | goto out_unlock; | |
1042 | ||
1043 | ceph_dentry_lru_touch(dentry); | |
1044 | ||
1045 | if (!di->lease_session) | |
1046 | di->lease_session = ceph_get_mds_session(session); | |
1047 | di->lease_gen = session->s_cap_gen; | |
1048 | di->lease_seq = le32_to_cpu(lease->seq); | |
1049 | di->lease_renew_after = half_ttl; | |
1050 | di->lease_renew_from = 0; | |
1051 | dentry->d_time = ttl; | |
1052 | out_unlock: | |
1053 | spin_unlock(&dentry->d_lock); | |
1054 | return; | |
1055 | } | |
1056 | ||
1057 | /* | |
1058 | * splice a dentry to an inode. | |
1059 | * caller must hold directory i_mutex for this to be safe. | |
355da1eb | 1060 | */ |
f7380af0 | 1061 | static struct dentry *splice_dentry(struct dentry *dn, struct inode *in) |
355da1eb SW |
1062 | { |
1063 | struct dentry *realdn; | |
1064 | ||
2b0143b5 | 1065 | BUG_ON(d_inode(dn)); |
1cd3935b | 1066 | |
355da1eb SW |
1067 | /* dn must be unhashed */ |
1068 | if (!d_unhashed(dn)) | |
1069 | d_drop(dn); | |
41d28bca | 1070 | realdn = d_splice_alias(in, dn); |
355da1eb | 1071 | if (IS_ERR(realdn)) { |
d69ed05a SW |
1072 | pr_err("splice_dentry error %ld %p inode %p ino %llx.%llx\n", |
1073 | PTR_ERR(realdn), dn, in, ceph_vinop(in)); | |
355da1eb SW |
1074 | dn = realdn; /* note realdn contains the error */ |
1075 | goto out; | |
1076 | } else if (realdn) { | |
1077 | dout("dn %p (%d) spliced with %p (%d) " | |
1078 | "inode %p ino %llx.%llx\n", | |
84d08fa8 AV |
1079 | dn, d_count(dn), |
1080 | realdn, d_count(realdn), | |
2b0143b5 | 1081 | d_inode(realdn), ceph_vinop(d_inode(realdn))); |
355da1eb SW |
1082 | dput(dn); |
1083 | dn = realdn; | |
1084 | } else { | |
1085 | BUG_ON(!ceph_dentry(dn)); | |
355da1eb | 1086 | dout("dn %p attached to %p ino %llx.%llx\n", |
2b0143b5 | 1087 | dn, d_inode(dn), ceph_vinop(d_inode(dn))); |
355da1eb | 1088 | } |
355da1eb SW |
1089 | out: |
1090 | return dn; | |
1091 | } | |
1092 | ||
1093 | /* | |
1094 | * Incorporate results into the local cache. This is either just | |
1095 | * one inode, or a directory, dentry, and possibly linked-to inode (e.g., | |
1096 | * after a lookup). | |
1097 | * | |
1098 | * A reply may contain | |
1099 | * a directory inode along with a dentry. | |
1100 | * and/or a target inode | |
1101 | * | |
1102 | * Called with snap_rwsem (read). | |
1103 | */ | |
1104 | int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req, | |
1105 | struct ceph_mds_session *session) | |
1106 | { | |
1107 | struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; | |
1108 | struct inode *in = NULL; | |
355da1eb | 1109 | struct ceph_vino vino; |
3d14c5d2 | 1110 | struct ceph_fs_client *fsc = ceph_sb_to_client(sb); |
355da1eb SW |
1111 | int err = 0; |
1112 | ||
1113 | dout("fill_trace %p is_dentry %d is_target %d\n", req, | |
1114 | rinfo->head->is_dentry, rinfo->head->is_target); | |
1115 | ||
1116 | #if 0 | |
1117 | /* | |
1118 | * Debugging hook: | |
1119 | * | |
1120 | * If we resend completed ops to a recovering mds, we get no | |
1121 | * trace. Since that is very rare, pretend this is the case | |
1122 | * to ensure the 'no trace' handlers in the callers behave. | |
1123 | * | |
1124 | * Fill in inodes unconditionally to avoid breaking cap | |
1125 | * invariants. | |
1126 | */ | |
1127 | if (rinfo->head->op & CEPH_MDS_OP_WRITE) { | |
1128 | pr_info("fill_trace faking empty trace on %lld %s\n", | |
1129 | req->r_tid, ceph_mds_op_name(rinfo->head->op)); | |
1130 | if (rinfo->head->is_dentry) { | |
1131 | rinfo->head->is_dentry = 0; | |
1132 | err = fill_inode(req->r_locked_dir, | |
1133 | &rinfo->diri, rinfo->dirfrag, | |
1134 | session, req->r_request_started, -1); | |
1135 | } | |
1136 | if (rinfo->head->is_target) { | |
1137 | rinfo->head->is_target = 0; | |
1138 | ininfo = rinfo->targeti.in; | |
1139 | vino.ino = le64_to_cpu(ininfo->ino); | |
1140 | vino.snap = le64_to_cpu(ininfo->snapid); | |
1141 | in = ceph_get_inode(sb, vino); | |
1142 | err = fill_inode(in, &rinfo->targeti, NULL, | |
1143 | session, req->r_request_started, | |
1144 | req->r_fmode); | |
1145 | iput(in); | |
1146 | } | |
1147 | } | |
1148 | #endif | |
1149 | ||
1150 | if (!rinfo->head->is_target && !rinfo->head->is_dentry) { | |
1151 | dout("fill_trace reply is empty!\n"); | |
167c9e35 SW |
1152 | if (rinfo->head->result == 0 && req->r_locked_dir) |
1153 | ceph_invalidate_dir_request(req); | |
355da1eb SW |
1154 | return 0; |
1155 | } | |
1156 | ||
1157 | if (rinfo->head->is_dentry) { | |
5b1daecd SW |
1158 | struct inode *dir = req->r_locked_dir; |
1159 | ||
6c5e50fa | 1160 | if (dir) { |
01deead0 YZ |
1161 | err = fill_inode(dir, NULL, |
1162 | &rinfo->diri, rinfo->dirfrag, | |
6c5e50fa SW |
1163 | session, req->r_request_started, -1, |
1164 | &req->r_caps_reservation); | |
1165 | if (err < 0) | |
19913b4e | 1166 | goto done; |
6c5e50fa SW |
1167 | } else { |
1168 | WARN_ON_ONCE(1); | |
1169 | } | |
19913b4e YZ |
1170 | |
1171 | if (dir && req->r_op == CEPH_MDS_OP_LOOKUPNAME) { | |
1172 | struct qstr dname; | |
1173 | struct dentry *dn, *parent; | |
1174 | ||
1175 | BUG_ON(!rinfo->head->is_target); | |
1176 | BUG_ON(req->r_dentry); | |
1177 | ||
1178 | parent = d_find_any_alias(dir); | |
1179 | BUG_ON(!parent); | |
1180 | ||
1181 | dname.name = rinfo->dname; | |
1182 | dname.len = rinfo->dname_len; | |
1183 | dname.hash = full_name_hash(dname.name, dname.len); | |
1184 | vino.ino = le64_to_cpu(rinfo->targeti.in->ino); | |
1185 | vino.snap = le64_to_cpu(rinfo->targeti.in->snapid); | |
1186 | retry_lookup: | |
1187 | dn = d_lookup(parent, &dname); | |
1188 | dout("d_lookup on parent=%p name=%.*s got %p\n", | |
1189 | parent, dname.len, dname.name, dn); | |
1190 | ||
1191 | if (!dn) { | |
1192 | dn = d_alloc(parent, &dname); | |
1193 | dout("d_alloc %p '%.*s' = %p\n", parent, | |
1194 | dname.len, dname.name, dn); | |
1195 | if (dn == NULL) { | |
1196 | dput(parent); | |
1197 | err = -ENOMEM; | |
1198 | goto done; | |
1199 | } | |
1200 | err = ceph_init_dentry(dn); | |
1201 | if (err < 0) { | |
1202 | dput(dn); | |
1203 | dput(parent); | |
1204 | goto done; | |
1205 | } | |
2b0143b5 DH |
1206 | } else if (d_really_is_positive(dn) && |
1207 | (ceph_ino(d_inode(dn)) != vino.ino || | |
1208 | ceph_snap(d_inode(dn)) != vino.snap)) { | |
19913b4e | 1209 | dout(" dn %p points to wrong inode %p\n", |
2b0143b5 | 1210 | dn, d_inode(dn)); |
19913b4e YZ |
1211 | d_delete(dn); |
1212 | dput(dn); | |
1213 | goto retry_lookup; | |
1214 | } | |
1215 | ||
1216 | req->r_dentry = dn; | |
1217 | dput(parent); | |
1218 | } | |
5b1daecd SW |
1219 | } |
1220 | ||
86b58d13 YZ |
1221 | if (rinfo->head->is_target) { |
1222 | vino.ino = le64_to_cpu(rinfo->targeti.in->ino); | |
1223 | vino.snap = le64_to_cpu(rinfo->targeti.in->snapid); | |
1224 | ||
1225 | in = ceph_get_inode(sb, vino); | |
1226 | if (IS_ERR(in)) { | |
1227 | err = PTR_ERR(in); | |
1228 | goto done; | |
1229 | } | |
1230 | req->r_target_inode = in; | |
1231 | ||
01deead0 | 1232 | err = fill_inode(in, req->r_locked_page, &rinfo->targeti, NULL, |
86b58d13 | 1233 | session, req->r_request_started, |
48193012 | 1234 | (!req->r_aborted && rinfo->head->result == 0) ? |
86b58d13 YZ |
1235 | req->r_fmode : -1, |
1236 | &req->r_caps_reservation); | |
1237 | if (err < 0) { | |
1238 | pr_err("fill_inode badness %p %llx.%llx\n", | |
1239 | in, ceph_vinop(in)); | |
1240 | goto done; | |
1241 | } | |
1242 | } | |
1243 | ||
9358c6d4 SW |
1244 | /* |
1245 | * ignore null lease/binding on snapdir ENOENT, or else we | |
1246 | * will have trouble splicing in the virtual snapdir later | |
1247 | */ | |
1248 | if (rinfo->head->is_dentry && !req->r_aborted && | |
6c5e50fa | 1249 | req->r_locked_dir && |
9358c6d4 | 1250 | (rinfo->head->is_target || strncmp(req->r_dentry->d_name.name, |
3d14c5d2 | 1251 | fsc->mount_options->snapdir_name, |
9358c6d4 | 1252 | req->r_dentry->d_name.len))) { |
355da1eb SW |
1253 | /* |
1254 | * lookup link rename : null -> possibly existing inode | |
1255 | * mknod symlink mkdir : null -> new inode | |
1256 | * unlink : linked -> null | |
1257 | */ | |
1258 | struct inode *dir = req->r_locked_dir; | |
1259 | struct dentry *dn = req->r_dentry; | |
1260 | bool have_dir_cap, have_lease; | |
1261 | ||
1262 | BUG_ON(!dn); | |
1263 | BUG_ON(!dir); | |
2b0143b5 | 1264 | BUG_ON(d_inode(dn->d_parent) != dir); |
355da1eb SW |
1265 | BUG_ON(ceph_ino(dir) != |
1266 | le64_to_cpu(rinfo->diri.in->ino)); | |
1267 | BUG_ON(ceph_snap(dir) != | |
1268 | le64_to_cpu(rinfo->diri.in->snapid)); | |
1269 | ||
355da1eb SW |
1270 | /* do we have a lease on the whole dir? */ |
1271 | have_dir_cap = | |
1272 | (le32_to_cpu(rinfo->diri.in->cap.caps) & | |
1273 | CEPH_CAP_FILE_SHARED); | |
1274 | ||
1275 | /* do we have a dn lease? */ | |
1276 | have_lease = have_dir_cap || | |
2f90b852 | 1277 | le32_to_cpu(rinfo->dlease->duration_ms); |
355da1eb SW |
1278 | if (!have_lease) |
1279 | dout("fill_trace no dentry lease or dir cap\n"); | |
1280 | ||
1281 | /* rename? */ | |
1282 | if (req->r_old_dentry && req->r_op == CEPH_MDS_OP_RENAME) { | |
0a8a70f9 YZ |
1283 | struct inode *olddir = req->r_old_dentry_dir; |
1284 | BUG_ON(!olddir); | |
1285 | ||
a455589f | 1286 | dout(" src %p '%pd' dst %p '%pd'\n", |
355da1eb | 1287 | req->r_old_dentry, |
a455589f AV |
1288 | req->r_old_dentry, |
1289 | dn, dn); | |
355da1eb SW |
1290 | dout("fill_trace doing d_move %p -> %p\n", |
1291 | req->r_old_dentry, dn); | |
c10f5e12 | 1292 | |
fdd4e158 YZ |
1293 | /* d_move screws up sibling dentries' offsets */ |
1294 | ceph_dir_clear_ordered(dir); | |
1295 | ceph_dir_clear_ordered(olddir); | |
1296 | ||
355da1eb | 1297 | d_move(req->r_old_dentry, dn); |
a455589f AV |
1298 | dout(" src %p '%pd' dst %p '%pd'\n", |
1299 | req->r_old_dentry, | |
355da1eb | 1300 | req->r_old_dentry, |
a455589f | 1301 | dn, dn); |
81a6cf2d | 1302 | |
c4a29f26 SW |
1303 | /* ensure target dentry is invalidated, despite |
1304 | rehashing bug in vfs_rename_dir */ | |
81a6cf2d SW |
1305 | ceph_invalidate_dentry_lease(dn); |
1306 | ||
99ccbd22 | 1307 | dout("dn %p gets new offset %lld\n", req->r_old_dentry, |
1cd3935b | 1308 | ceph_dentry(req->r_old_dentry)->offset); |
81a6cf2d | 1309 | |
355da1eb | 1310 | dn = req->r_old_dentry; /* use old_dentry */ |
355da1eb SW |
1311 | } |
1312 | ||
1313 | /* null dentry? */ | |
1314 | if (!rinfo->head->is_target) { | |
1315 | dout("fill_trace null dentry\n"); | |
2b0143b5 | 1316 | if (d_really_is_positive(dn)) { |
70db4f36 | 1317 | ceph_dir_clear_ordered(dir); |
355da1eb SW |
1318 | dout("d_delete %p\n", dn); |
1319 | d_delete(dn); | |
1320 | } else { | |
355da1eb | 1321 | if (have_lease && d_unhashed(dn)) |
f8b31710 | 1322 | d_add(dn, NULL); |
355da1eb SW |
1323 | update_dentry_lease(dn, rinfo->dlease, |
1324 | session, | |
1325 | req->r_request_started); | |
1326 | } | |
1327 | goto done; | |
1328 | } | |
1329 | ||
1330 | /* attach proper inode */ | |
2b0143b5 | 1331 | if (d_really_is_negative(dn)) { |
70db4f36 | 1332 | ceph_dir_clear_ordered(dir); |
86b58d13 | 1333 | ihold(in); |
f7380af0 | 1334 | dn = splice_dentry(dn, in); |
355da1eb SW |
1335 | if (IS_ERR(dn)) { |
1336 | err = PTR_ERR(dn); | |
1337 | goto done; | |
1338 | } | |
1339 | req->r_dentry = dn; /* may have spliced */ | |
2b0143b5 | 1340 | } else if (d_really_is_positive(dn) && d_inode(dn) != in) { |
355da1eb | 1341 | dout(" %p links to %p %llx.%llx, not %llx.%llx\n", |
2b0143b5 | 1342 | dn, d_inode(dn), ceph_vinop(d_inode(dn)), |
86b58d13 | 1343 | ceph_vinop(in)); |
200fd27c | 1344 | d_invalidate(dn); |
355da1eb | 1345 | have_lease = false; |
355da1eb SW |
1346 | } |
1347 | ||
1348 | if (have_lease) | |
1349 | update_dentry_lease(dn, rinfo->dlease, session, | |
1350 | req->r_request_started); | |
1351 | dout(" final dn %p\n", dn); | |
86b58d13 YZ |
1352 | } else if (!req->r_aborted && |
1353 | (req->r_op == CEPH_MDS_OP_LOOKUPSNAP || | |
1354 | req->r_op == CEPH_MDS_OP_MKSNAP)) { | |
355da1eb | 1355 | struct dentry *dn = req->r_dentry; |
0a8a70f9 | 1356 | struct inode *dir = req->r_locked_dir; |
355da1eb SW |
1357 | |
1358 | /* fill out a snapdir LOOKUPSNAP dentry */ | |
1359 | BUG_ON(!dn); | |
0a8a70f9 YZ |
1360 | BUG_ON(!dir); |
1361 | BUG_ON(ceph_snap(dir) != CEPH_SNAPDIR); | |
355da1eb | 1362 | dout(" linking snapped dir %p to dn %p\n", in, dn); |
70db4f36 | 1363 | ceph_dir_clear_ordered(dir); |
86b58d13 | 1364 | ihold(in); |
f7380af0 | 1365 | dn = splice_dentry(dn, in); |
355da1eb SW |
1366 | if (IS_ERR(dn)) { |
1367 | err = PTR_ERR(dn); | |
1368 | goto done; | |
1369 | } | |
1370 | req->r_dentry = dn; /* may have spliced */ | |
355da1eb | 1371 | } |
355da1eb SW |
1372 | done: |
1373 | dout("fill_trace done err=%d\n", err); | |
1374 | return err; | |
1375 | } | |
1376 | ||
1377 | /* | |
1378 | * Prepopulate our cache with readdir results, leases, etc. | |
1379 | */ | |
79f9f99a SW |
1380 | static int readdir_prepopulate_inodes_only(struct ceph_mds_request *req, |
1381 | struct ceph_mds_session *session) | |
1382 | { | |
1383 | struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; | |
1384 | int i, err = 0; | |
1385 | ||
1386 | for (i = 0; i < rinfo->dir_nr; i++) { | |
2a5beea3 | 1387 | struct ceph_mds_reply_dir_entry *rde = rinfo->dir_entries + i; |
79f9f99a SW |
1388 | struct ceph_vino vino; |
1389 | struct inode *in; | |
1390 | int rc; | |
1391 | ||
2a5beea3 YZ |
1392 | vino.ino = le64_to_cpu(rde->inode.in->ino); |
1393 | vino.snap = le64_to_cpu(rde->inode.in->snapid); | |
79f9f99a SW |
1394 | |
1395 | in = ceph_get_inode(req->r_dentry->d_sb, vino); | |
1396 | if (IS_ERR(in)) { | |
1397 | err = PTR_ERR(in); | |
1398 | dout("new_inode badness got %d\n", err); | |
1399 | continue; | |
1400 | } | |
2a5beea3 | 1401 | rc = fill_inode(in, NULL, &rde->inode, NULL, session, |
79f9f99a SW |
1402 | req->r_request_started, -1, |
1403 | &req->r_caps_reservation); | |
1404 | if (rc < 0) { | |
1405 | pr_err("fill_inode badness on %p got %d\n", in, rc); | |
1406 | err = rc; | |
79f9f99a | 1407 | } |
209ae762 | 1408 | iput(in); |
79f9f99a SW |
1409 | } |
1410 | ||
1411 | return err; | |
1412 | } | |
1413 | ||
fdd4e158 YZ |
1414 | void ceph_readdir_cache_release(struct ceph_readdir_cache_control *ctl) |
1415 | { | |
1416 | if (ctl->page) { | |
1417 | kunmap(ctl->page); | |
09cbfeaf | 1418 | put_page(ctl->page); |
fdd4e158 YZ |
1419 | ctl->page = NULL; |
1420 | } | |
1421 | } | |
1422 | ||
1423 | static int fill_readdir_cache(struct inode *dir, struct dentry *dn, | |
1424 | struct ceph_readdir_cache_control *ctl, | |
1425 | struct ceph_mds_request *req) | |
1426 | { | |
1427 | struct ceph_inode_info *ci = ceph_inode(dir); | |
09cbfeaf | 1428 | unsigned nsize = PAGE_SIZE / sizeof(struct dentry*); |
fdd4e158 YZ |
1429 | unsigned idx = ctl->index % nsize; |
1430 | pgoff_t pgoff = ctl->index / nsize; | |
1431 | ||
1432 | if (!ctl->page || pgoff != page_index(ctl->page)) { | |
1433 | ceph_readdir_cache_release(ctl); | |
af5e5eb5 YZ |
1434 | if (idx == 0) |
1435 | ctl->page = grab_cache_page(&dir->i_data, pgoff); | |
1436 | else | |
1437 | ctl->page = find_lock_page(&dir->i_data, pgoff); | |
fdd4e158 YZ |
1438 | if (!ctl->page) { |
1439 | ctl->index = -1; | |
af5e5eb5 | 1440 | return idx == 0 ? -ENOMEM : 0; |
fdd4e158 YZ |
1441 | } |
1442 | /* reading/filling the cache are serialized by | |
1443 | * i_mutex, no need to use page lock */ | |
1444 | unlock_page(ctl->page); | |
1445 | ctl->dentries = kmap(ctl->page); | |
af5e5eb5 | 1446 | if (idx == 0) |
09cbfeaf | 1447 | memset(ctl->dentries, 0, PAGE_SIZE); |
fdd4e158 YZ |
1448 | } |
1449 | ||
1450 | if (req->r_dir_release_cnt == atomic64_read(&ci->i_release_count) && | |
1451 | req->r_dir_ordered_cnt == atomic64_read(&ci->i_ordered_count)) { | |
1452 | dout("readdir cache dn %p idx %d\n", dn, ctl->index); | |
1453 | ctl->dentries[idx] = dn; | |
1454 | ctl->index++; | |
1455 | } else { | |
1456 | dout("disable readdir cache\n"); | |
1457 | ctl->index = -1; | |
1458 | } | |
1459 | return 0; | |
1460 | } | |
1461 | ||
355da1eb SW |
1462 | int ceph_readdir_prepopulate(struct ceph_mds_request *req, |
1463 | struct ceph_mds_session *session) | |
1464 | { | |
1465 | struct dentry *parent = req->r_dentry; | |
f3c4ebe6 | 1466 | struct ceph_inode_info *ci = ceph_inode(d_inode(parent)); |
355da1eb SW |
1467 | struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; |
1468 | struct qstr dname; | |
1469 | struct dentry *dn; | |
1470 | struct inode *in; | |
315f2408 | 1471 | int err = 0, skipped = 0, ret, i; |
355da1eb SW |
1472 | struct inode *snapdir = NULL; |
1473 | struct ceph_mds_request_head *rhead = req->r_request->front.iov_base; | |
81c6aea5 | 1474 | u32 frag = le32_to_cpu(rhead->args.readdir.frag); |
f3c4ebe6 YZ |
1475 | u32 last_hash = 0; |
1476 | u32 fpos_offset; | |
fdd4e158 YZ |
1477 | struct ceph_readdir_cache_control cache_ctl = {}; |
1478 | ||
1479 | if (req->r_aborted) | |
1480 | return readdir_prepopulate_inodes_only(req, session); | |
81c6aea5 | 1481 | |
f3c4ebe6 YZ |
1482 | if (rinfo->hash_order && req->r_path2) { |
1483 | last_hash = ceph_str_hash(ci->i_dir_layout.dl_dir_hash, | |
1484 | req->r_path2, strlen(req->r_path2)); | |
1485 | last_hash = ceph_frag_value(last_hash); | |
1486 | } | |
1487 | ||
81c6aea5 YZ |
1488 | if (rinfo->dir_dir && |
1489 | le32_to_cpu(rinfo->dir_dir->frag) != frag) { | |
1490 | dout("readdir_prepopulate got new frag %x -> %x\n", | |
1491 | frag, le32_to_cpu(rinfo->dir_dir->frag)); | |
1492 | frag = le32_to_cpu(rinfo->dir_dir->frag); | |
f3c4ebe6 | 1493 | if (!rinfo->hash_order) |
fdd4e158 | 1494 | req->r_readdir_offset = 2; |
81c6aea5 | 1495 | } |
355da1eb SW |
1496 | |
1497 | if (le32_to_cpu(rinfo->head->op) == CEPH_MDS_OP_LSSNAP) { | |
2b0143b5 | 1498 | snapdir = ceph_get_snapdir(d_inode(parent)); |
355da1eb SW |
1499 | parent = d_find_alias(snapdir); |
1500 | dout("readdir_prepopulate %d items under SNAPDIR dn %p\n", | |
1501 | rinfo->dir_nr, parent); | |
1502 | } else { | |
1503 | dout("readdir_prepopulate %d items under dn %p\n", | |
1504 | rinfo->dir_nr, parent); | |
1505 | if (rinfo->dir_dir) | |
2b0143b5 | 1506 | ceph_fill_dirfrag(d_inode(parent), rinfo->dir_dir); |
355da1eb SW |
1507 | } |
1508 | ||
fdd4e158 YZ |
1509 | if (ceph_frag_is_leftmost(frag) && req->r_readdir_offset == 2) { |
1510 | /* note dir version at start of readdir so we can tell | |
1511 | * if any dentries get dropped */ | |
fdd4e158 YZ |
1512 | req->r_dir_release_cnt = atomic64_read(&ci->i_release_count); |
1513 | req->r_dir_ordered_cnt = atomic64_read(&ci->i_ordered_count); | |
1514 | req->r_readdir_cache_idx = 0; | |
1515 | } | |
1516 | ||
1517 | cache_ctl.index = req->r_readdir_cache_idx; | |
f3c4ebe6 | 1518 | fpos_offset = req->r_readdir_offset; |
fdd4e158 | 1519 | |
86b58d13 | 1520 | /* FIXME: release caps/leases if error occurs */ |
355da1eb | 1521 | for (i = 0; i < rinfo->dir_nr; i++) { |
2a5beea3 | 1522 | struct ceph_mds_reply_dir_entry *rde = rinfo->dir_entries + i; |
355da1eb SW |
1523 | struct ceph_vino vino; |
1524 | ||
2a5beea3 YZ |
1525 | dname.name = rde->name; |
1526 | dname.len = rde->name_len; | |
355da1eb SW |
1527 | dname.hash = full_name_hash(dname.name, dname.len); |
1528 | ||
2a5beea3 YZ |
1529 | vino.ino = le64_to_cpu(rde->inode.in->ino); |
1530 | vino.snap = le64_to_cpu(rde->inode.in->snapid); | |
355da1eb | 1531 | |
f3c4ebe6 YZ |
1532 | if (rinfo->hash_order) { |
1533 | u32 hash = ceph_str_hash(ci->i_dir_layout.dl_dir_hash, | |
1534 | rde->name, rde->name_len); | |
1535 | hash = ceph_frag_value(hash); | |
1536 | if (hash != last_hash) | |
1537 | fpos_offset = 2; | |
1538 | last_hash = hash; | |
1539 | rde->offset = ceph_make_fpos(hash, fpos_offset++, true); | |
1540 | } else { | |
1541 | rde->offset = ceph_make_fpos(frag, fpos_offset++, false); | |
1542 | } | |
355da1eb SW |
1543 | |
1544 | retry_lookup: | |
1545 | dn = d_lookup(parent, &dname); | |
1546 | dout("d_lookup on parent=%p name=%.*s got %p\n", | |
1547 | parent, dname.len, dname.name, dn); | |
1548 | ||
1549 | if (!dn) { | |
1550 | dn = d_alloc(parent, &dname); | |
1551 | dout("d_alloc %p '%.*s' = %p\n", parent, | |
1552 | dname.len, dname.name, dn); | |
1553 | if (dn == NULL) { | |
1554 | dout("d_alloc badness\n"); | |
1555 | err = -ENOMEM; | |
1556 | goto out; | |
1557 | } | |
86b58d13 YZ |
1558 | ret = ceph_init_dentry(dn); |
1559 | if (ret < 0) { | |
8c696737 | 1560 | dput(dn); |
86b58d13 | 1561 | err = ret; |
355da1eb | 1562 | goto out; |
8c696737 | 1563 | } |
2b0143b5 DH |
1564 | } else if (d_really_is_positive(dn) && |
1565 | (ceph_ino(d_inode(dn)) != vino.ino || | |
1566 | ceph_snap(d_inode(dn)) != vino.snap)) { | |
355da1eb | 1567 | dout(" dn %p points to wrong inode %p\n", |
2b0143b5 | 1568 | dn, d_inode(dn)); |
355da1eb SW |
1569 | d_delete(dn); |
1570 | dput(dn); | |
1571 | goto retry_lookup; | |
355da1eb SW |
1572 | } |
1573 | ||
355da1eb | 1574 | /* inode */ |
2b0143b5 DH |
1575 | if (d_really_is_positive(dn)) { |
1576 | in = d_inode(dn); | |
355da1eb SW |
1577 | } else { |
1578 | in = ceph_get_inode(parent->d_sb, vino); | |
ac1f12ef | 1579 | if (IS_ERR(in)) { |
355da1eb | 1580 | dout("new_inode badness\n"); |
2744c171 | 1581 | d_drop(dn); |
355da1eb | 1582 | dput(dn); |
ac1f12ef | 1583 | err = PTR_ERR(in); |
355da1eb SW |
1584 | goto out; |
1585 | } | |
355da1eb SW |
1586 | } |
1587 | ||
2a5beea3 | 1588 | ret = fill_inode(in, NULL, &rde->inode, NULL, session, |
fdd4e158 YZ |
1589 | req->r_request_started, -1, |
1590 | &req->r_caps_reservation); | |
1591 | if (ret < 0) { | |
355da1eb | 1592 | pr_err("fill_inode badness on %p\n", in); |
2b0143b5 | 1593 | if (d_really_is_negative(dn)) |
86b58d13 YZ |
1594 | iput(in); |
1595 | d_drop(dn); | |
fdd4e158 | 1596 | err = ret; |
d69ed05a | 1597 | goto next_item; |
355da1eb | 1598 | } |
86b58d13 | 1599 | |
2b0143b5 | 1600 | if (d_really_is_negative(dn)) { |
315f2408 YZ |
1601 | struct dentry *realdn; |
1602 | ||
1603 | if (ceph_security_xattr_deadlock(in)) { | |
1604 | dout(" skip splicing dn %p to inode %p" | |
1605 | " (security xattr deadlock)\n", dn, in); | |
1606 | iput(in); | |
1607 | skipped++; | |
1608 | goto next_item; | |
1609 | } | |
1610 | ||
1611 | realdn = splice_dentry(dn, in); | |
5cba372c YZ |
1612 | if (IS_ERR(realdn)) { |
1613 | err = PTR_ERR(realdn); | |
1614 | d_drop(dn); | |
86b58d13 YZ |
1615 | dn = NULL; |
1616 | goto next_item; | |
1617 | } | |
5cba372c | 1618 | dn = realdn; |
86b58d13 YZ |
1619 | } |
1620 | ||
f3c4ebe6 | 1621 | ceph_dentry(dn)->offset = rde->offset; |
86b58d13 | 1622 | |
2a5beea3 | 1623 | update_dentry_lease(dn, rde->lease, req->r_session, |
86b58d13 | 1624 | req->r_request_started); |
fdd4e158 | 1625 | |
315f2408 | 1626 | if (err == 0 && skipped == 0 && cache_ctl.index >= 0) { |
fdd4e158 YZ |
1627 | ret = fill_readdir_cache(d_inode(parent), dn, |
1628 | &cache_ctl, req); | |
1629 | if (ret < 0) | |
1630 | err = ret; | |
1631 | } | |
d69ed05a SW |
1632 | next_item: |
1633 | if (dn) | |
1634 | dput(dn); | |
355da1eb | 1635 | } |
355da1eb | 1636 | out: |
315f2408 | 1637 | if (err == 0 && skipped == 0) { |
fdd4e158 YZ |
1638 | req->r_did_prepopulate = true; |
1639 | req->r_readdir_cache_idx = cache_ctl.index; | |
1640 | } | |
1641 | ceph_readdir_cache_release(&cache_ctl); | |
355da1eb SW |
1642 | if (snapdir) { |
1643 | iput(snapdir); | |
1644 | dput(parent); | |
1645 | } | |
1646 | dout("readdir_prepopulate done\n"); | |
1647 | return err; | |
1648 | } | |
1649 | ||
1650 | int ceph_inode_set_size(struct inode *inode, loff_t size) | |
1651 | { | |
1652 | struct ceph_inode_info *ci = ceph_inode(inode); | |
1653 | int ret = 0; | |
1654 | ||
be655596 | 1655 | spin_lock(&ci->i_ceph_lock); |
355da1eb | 1656 | dout("set_size %p %llu -> %llu\n", inode, inode->i_size, size); |
99c88e69 | 1657 | i_size_write(inode, size); |
224a7542 | 1658 | inode->i_blocks = calc_inode_blocks(size); |
355da1eb SW |
1659 | |
1660 | /* tell the MDS if we are approaching max_size */ | |
1661 | if ((size << 1) >= ci->i_max_size && | |
1662 | (ci->i_reported_size << 1) < ci->i_max_size) | |
1663 | ret = 1; | |
1664 | ||
be655596 | 1665 | spin_unlock(&ci->i_ceph_lock); |
355da1eb SW |
1666 | return ret; |
1667 | } | |
1668 | ||
1669 | /* | |
1670 | * Write back inode data in a worker thread. (This can't be done | |
1671 | * in the message handler context.) | |
1672 | */ | |
3c6f6b79 SW |
1673 | void ceph_queue_writeback(struct inode *inode) |
1674 | { | |
15a2015f | 1675 | ihold(inode); |
3c6f6b79 SW |
1676 | if (queue_work(ceph_inode_to_client(inode)->wb_wq, |
1677 | &ceph_inode(inode)->i_wb_work)) { | |
2c27c9a5 | 1678 | dout("ceph_queue_writeback %p\n", inode); |
3c6f6b79 | 1679 | } else { |
2c27c9a5 | 1680 | dout("ceph_queue_writeback %p failed\n", inode); |
15a2015f | 1681 | iput(inode); |
3c6f6b79 SW |
1682 | } |
1683 | } | |
1684 | ||
1685 | static void ceph_writeback_work(struct work_struct *work) | |
355da1eb SW |
1686 | { |
1687 | struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info, | |
1688 | i_wb_work); | |
1689 | struct inode *inode = &ci->vfs_inode; | |
1690 | ||
1691 | dout("writeback %p\n", inode); | |
1692 | filemap_fdatawrite(&inode->i_data); | |
1693 | iput(inode); | |
1694 | } | |
1695 | ||
3c6f6b79 SW |
1696 | /* |
1697 | * queue an async invalidation | |
1698 | */ | |
1699 | void ceph_queue_invalidate(struct inode *inode) | |
1700 | { | |
15a2015f | 1701 | ihold(inode); |
3c6f6b79 SW |
1702 | if (queue_work(ceph_inode_to_client(inode)->pg_inv_wq, |
1703 | &ceph_inode(inode)->i_pg_inv_work)) { | |
1704 | dout("ceph_queue_invalidate %p\n", inode); | |
3c6f6b79 SW |
1705 | } else { |
1706 | dout("ceph_queue_invalidate %p failed\n", inode); | |
15a2015f | 1707 | iput(inode); |
3c6f6b79 SW |
1708 | } |
1709 | } | |
1710 | ||
355da1eb SW |
1711 | /* |
1712 | * Invalidate inode pages in a worker thread. (This can't be done | |
1713 | * in the message handler context.) | |
1714 | */ | |
3c6f6b79 | 1715 | static void ceph_invalidate_work(struct work_struct *work) |
355da1eb SW |
1716 | { |
1717 | struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info, | |
1718 | i_pg_inv_work); | |
1719 | struct inode *inode = &ci->vfs_inode; | |
6c93df5d | 1720 | struct ceph_fs_client *fsc = ceph_inode_to_client(inode); |
355da1eb SW |
1721 | u32 orig_gen; |
1722 | int check = 0; | |
1723 | ||
b0d7c223 | 1724 | mutex_lock(&ci->i_truncate_mutex); |
6c93df5d YZ |
1725 | |
1726 | if (ACCESS_ONCE(fsc->mount_state) == CEPH_MOUNT_SHUTDOWN) { | |
1727 | pr_warn_ratelimited("invalidate_pages %p %lld forced umount\n", | |
1728 | inode, ceph_ino(inode)); | |
1729 | mapping_set_error(inode->i_mapping, -EIO); | |
1730 | truncate_pagecache(inode, 0); | |
1731 | mutex_unlock(&ci->i_truncate_mutex); | |
1732 | goto out; | |
1733 | } | |
1734 | ||
be655596 | 1735 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
1736 | dout("invalidate_pages %p gen %d revoking %d\n", inode, |
1737 | ci->i_rdcache_gen, ci->i_rdcache_revoking); | |
cd045cb4 | 1738 | if (ci->i_rdcache_revoking != ci->i_rdcache_gen) { |
9563f88c YZ |
1739 | if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE)) |
1740 | check = 1; | |
be655596 | 1741 | spin_unlock(&ci->i_ceph_lock); |
b0d7c223 | 1742 | mutex_unlock(&ci->i_truncate_mutex); |
355da1eb SW |
1743 | goto out; |
1744 | } | |
1745 | orig_gen = ci->i_rdcache_gen; | |
be655596 | 1746 | spin_unlock(&ci->i_ceph_lock); |
355da1eb | 1747 | |
9abd4db7 YZ |
1748 | if (invalidate_inode_pages2(inode->i_mapping) < 0) { |
1749 | pr_err("invalidate_pages %p fails\n", inode); | |
1750 | } | |
355da1eb | 1751 | |
be655596 | 1752 | spin_lock(&ci->i_ceph_lock); |
cd045cb4 SW |
1753 | if (orig_gen == ci->i_rdcache_gen && |
1754 | orig_gen == ci->i_rdcache_revoking) { | |
355da1eb SW |
1755 | dout("invalidate_pages %p gen %d successful\n", inode, |
1756 | ci->i_rdcache_gen); | |
cd045cb4 | 1757 | ci->i_rdcache_revoking--; |
355da1eb SW |
1758 | check = 1; |
1759 | } else { | |
cd045cb4 SW |
1760 | dout("invalidate_pages %p gen %d raced, now %d revoking %d\n", |
1761 | inode, orig_gen, ci->i_rdcache_gen, | |
1762 | ci->i_rdcache_revoking); | |
9563f88c YZ |
1763 | if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE)) |
1764 | check = 1; | |
355da1eb | 1765 | } |
be655596 | 1766 | spin_unlock(&ci->i_ceph_lock); |
b0d7c223 | 1767 | mutex_unlock(&ci->i_truncate_mutex); |
9563f88c | 1768 | out: |
355da1eb SW |
1769 | if (check) |
1770 | ceph_check_caps(ci, 0, NULL); | |
355da1eb SW |
1771 | iput(inode); |
1772 | } | |
1773 | ||
1774 | ||
1775 | /* | |
3f99969f | 1776 | * called by trunc_wq; |
355da1eb SW |
1777 | * |
1778 | * We also truncate in a separate thread as well. | |
1779 | */ | |
3c6f6b79 | 1780 | static void ceph_vmtruncate_work(struct work_struct *work) |
355da1eb SW |
1781 | { |
1782 | struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info, | |
1783 | i_vmtruncate_work); | |
1784 | struct inode *inode = &ci->vfs_inode; | |
1785 | ||
1786 | dout("vmtruncate_work %p\n", inode); | |
b415bf4f | 1787 | __ceph_do_pending_vmtruncate(inode); |
355da1eb SW |
1788 | iput(inode); |
1789 | } | |
1790 | ||
3c6f6b79 SW |
1791 | /* |
1792 | * Queue an async vmtruncate. If we fail to queue work, we will handle | |
1793 | * the truncation the next time we call __ceph_do_pending_vmtruncate. | |
1794 | */ | |
1795 | void ceph_queue_vmtruncate(struct inode *inode) | |
1796 | { | |
1797 | struct ceph_inode_info *ci = ceph_inode(inode); | |
1798 | ||
15a2015f | 1799 | ihold(inode); |
99ccbd22 | 1800 | |
640ef79d | 1801 | if (queue_work(ceph_sb_to_client(inode->i_sb)->trunc_wq, |
3c6f6b79 SW |
1802 | &ci->i_vmtruncate_work)) { |
1803 | dout("ceph_queue_vmtruncate %p\n", inode); | |
3c6f6b79 SW |
1804 | } else { |
1805 | dout("ceph_queue_vmtruncate %p failed, pending=%d\n", | |
1806 | inode, ci->i_truncate_pending); | |
15a2015f | 1807 | iput(inode); |
3c6f6b79 SW |
1808 | } |
1809 | } | |
1810 | ||
355da1eb | 1811 | /* |
355da1eb SW |
1812 | * Make sure any pending truncation is applied before doing anything |
1813 | * that may depend on it. | |
1814 | */ | |
b415bf4f | 1815 | void __ceph_do_pending_vmtruncate(struct inode *inode) |
355da1eb SW |
1816 | { |
1817 | struct ceph_inode_info *ci = ceph_inode(inode); | |
1818 | u64 to; | |
a85f50b6 | 1819 | int wrbuffer_refs, finish = 0; |
355da1eb | 1820 | |
b0d7c223 | 1821 | mutex_lock(&ci->i_truncate_mutex); |
355da1eb | 1822 | retry: |
be655596 | 1823 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
1824 | if (ci->i_truncate_pending == 0) { |
1825 | dout("__do_pending_vmtruncate %p none pending\n", inode); | |
be655596 | 1826 | spin_unlock(&ci->i_ceph_lock); |
b0d7c223 | 1827 | mutex_unlock(&ci->i_truncate_mutex); |
355da1eb SW |
1828 | return; |
1829 | } | |
1830 | ||
1831 | /* | |
1832 | * make sure any dirty snapped pages are flushed before we | |
1833 | * possibly truncate them.. so write AND block! | |
1834 | */ | |
1835 | if (ci->i_wrbuffer_ref_head < ci->i_wrbuffer_ref) { | |
1836 | dout("__do_pending_vmtruncate %p flushing snaps first\n", | |
1837 | inode); | |
be655596 | 1838 | spin_unlock(&ci->i_ceph_lock); |
355da1eb SW |
1839 | filemap_write_and_wait_range(&inode->i_data, 0, |
1840 | inode->i_sb->s_maxbytes); | |
1841 | goto retry; | |
1842 | } | |
1843 | ||
b0d7c223 YZ |
1844 | /* there should be no reader or writer */ |
1845 | WARN_ON_ONCE(ci->i_rd_ref || ci->i_wr_ref); | |
1846 | ||
355da1eb SW |
1847 | to = ci->i_truncate_size; |
1848 | wrbuffer_refs = ci->i_wrbuffer_ref; | |
1849 | dout("__do_pending_vmtruncate %p (%d) to %lld\n", inode, | |
1850 | ci->i_truncate_pending, to); | |
be655596 | 1851 | spin_unlock(&ci->i_ceph_lock); |
355da1eb | 1852 | |
4e217b5d | 1853 | truncate_pagecache(inode, to); |
355da1eb | 1854 | |
be655596 | 1855 | spin_lock(&ci->i_ceph_lock); |
a85f50b6 YZ |
1856 | if (to == ci->i_truncate_size) { |
1857 | ci->i_truncate_pending = 0; | |
1858 | finish = 1; | |
1859 | } | |
be655596 | 1860 | spin_unlock(&ci->i_ceph_lock); |
a85f50b6 YZ |
1861 | if (!finish) |
1862 | goto retry; | |
355da1eb | 1863 | |
b0d7c223 YZ |
1864 | mutex_unlock(&ci->i_truncate_mutex); |
1865 | ||
355da1eb SW |
1866 | if (wrbuffer_refs == 0) |
1867 | ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL); | |
a85f50b6 YZ |
1868 | |
1869 | wake_up_all(&ci->i_cap_wq); | |
355da1eb SW |
1870 | } |
1871 | ||
355da1eb SW |
1872 | /* |
1873 | * symlinks | |
1874 | */ | |
355da1eb SW |
1875 | static const struct inode_operations ceph_symlink_iops = { |
1876 | .readlink = generic_readlink, | |
6b255391 | 1877 | .get_link = simple_get_link, |
0b932672 YZ |
1878 | .setattr = ceph_setattr, |
1879 | .getattr = ceph_getattr, | |
2cdeb1e4 AG |
1880 | .setxattr = generic_setxattr, |
1881 | .getxattr = generic_getxattr, | |
0b932672 | 1882 | .listxattr = ceph_listxattr, |
2cdeb1e4 | 1883 | .removexattr = generic_removexattr, |
355da1eb SW |
1884 | }; |
1885 | ||
a26fecca | 1886 | int __ceph_setattr(struct inode *inode, struct iattr *attr) |
355da1eb | 1887 | { |
355da1eb | 1888 | struct ceph_inode_info *ci = ceph_inode(inode); |
355da1eb SW |
1889 | const unsigned int ia_valid = attr->ia_valid; |
1890 | struct ceph_mds_request *req; | |
a26fecca | 1891 | struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc; |
f66fd9f0 | 1892 | struct ceph_cap_flush *prealloc_cf; |
355da1eb SW |
1893 | int issued; |
1894 | int release = 0, dirtied = 0; | |
1895 | int mask = 0; | |
1896 | int err = 0; | |
fca65b4a | 1897 | int inode_dirty_flags = 0; |
604d1b02 | 1898 | bool lock_snap_rwsem = false; |
355da1eb SW |
1899 | |
1900 | if (ceph_snap(inode) != CEPH_NOSNAP) | |
1901 | return -EROFS; | |
1902 | ||
355da1eb SW |
1903 | err = inode_change_ok(inode, attr); |
1904 | if (err != 0) | |
1905 | return err; | |
1906 | ||
f66fd9f0 YZ |
1907 | prealloc_cf = ceph_alloc_cap_flush(); |
1908 | if (!prealloc_cf) | |
1909 | return -ENOMEM; | |
1910 | ||
355da1eb SW |
1911 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETATTR, |
1912 | USE_AUTH_MDS); | |
f66fd9f0 YZ |
1913 | if (IS_ERR(req)) { |
1914 | ceph_free_cap_flush(prealloc_cf); | |
355da1eb | 1915 | return PTR_ERR(req); |
f66fd9f0 | 1916 | } |
355da1eb | 1917 | |
be655596 | 1918 | spin_lock(&ci->i_ceph_lock); |
355da1eb | 1919 | issued = __ceph_caps_issued(ci, NULL); |
604d1b02 YZ |
1920 | |
1921 | if (!ci->i_head_snapc && | |
1922 | (issued & (CEPH_CAP_ANY_EXCL | CEPH_CAP_FILE_WR))) { | |
1923 | lock_snap_rwsem = true; | |
1924 | if (!down_read_trylock(&mdsc->snap_rwsem)) { | |
1925 | spin_unlock(&ci->i_ceph_lock); | |
1926 | down_read(&mdsc->snap_rwsem); | |
1927 | spin_lock(&ci->i_ceph_lock); | |
1928 | issued = __ceph_caps_issued(ci, NULL); | |
1929 | } | |
1930 | } | |
1931 | ||
355da1eb SW |
1932 | dout("setattr %p issued %s\n", inode, ceph_cap_string(issued)); |
1933 | ||
1934 | if (ia_valid & ATTR_UID) { | |
1935 | dout("setattr %p uid %d -> %d\n", inode, | |
bd2bae6a EB |
1936 | from_kuid(&init_user_ns, inode->i_uid), |
1937 | from_kuid(&init_user_ns, attr->ia_uid)); | |
355da1eb SW |
1938 | if (issued & CEPH_CAP_AUTH_EXCL) { |
1939 | inode->i_uid = attr->ia_uid; | |
1940 | dirtied |= CEPH_CAP_AUTH_EXCL; | |
1941 | } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || | |
ab871b90 EB |
1942 | !uid_eq(attr->ia_uid, inode->i_uid)) { |
1943 | req->r_args.setattr.uid = cpu_to_le32( | |
1944 | from_kuid(&init_user_ns, attr->ia_uid)); | |
355da1eb SW |
1945 | mask |= CEPH_SETATTR_UID; |
1946 | release |= CEPH_CAP_AUTH_SHARED; | |
1947 | } | |
1948 | } | |
1949 | if (ia_valid & ATTR_GID) { | |
1950 | dout("setattr %p gid %d -> %d\n", inode, | |
bd2bae6a EB |
1951 | from_kgid(&init_user_ns, inode->i_gid), |
1952 | from_kgid(&init_user_ns, attr->ia_gid)); | |
355da1eb SW |
1953 | if (issued & CEPH_CAP_AUTH_EXCL) { |
1954 | inode->i_gid = attr->ia_gid; | |
1955 | dirtied |= CEPH_CAP_AUTH_EXCL; | |
1956 | } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || | |
ab871b90 EB |
1957 | !gid_eq(attr->ia_gid, inode->i_gid)) { |
1958 | req->r_args.setattr.gid = cpu_to_le32( | |
1959 | from_kgid(&init_user_ns, attr->ia_gid)); | |
355da1eb SW |
1960 | mask |= CEPH_SETATTR_GID; |
1961 | release |= CEPH_CAP_AUTH_SHARED; | |
1962 | } | |
1963 | } | |
1964 | if (ia_valid & ATTR_MODE) { | |
1965 | dout("setattr %p mode 0%o -> 0%o\n", inode, inode->i_mode, | |
1966 | attr->ia_mode); | |
1967 | if (issued & CEPH_CAP_AUTH_EXCL) { | |
1968 | inode->i_mode = attr->ia_mode; | |
1969 | dirtied |= CEPH_CAP_AUTH_EXCL; | |
1970 | } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || | |
1971 | attr->ia_mode != inode->i_mode) { | |
7221fe4c | 1972 | inode->i_mode = attr->ia_mode; |
355da1eb SW |
1973 | req->r_args.setattr.mode = cpu_to_le32(attr->ia_mode); |
1974 | mask |= CEPH_SETATTR_MODE; | |
1975 | release |= CEPH_CAP_AUTH_SHARED; | |
1976 | } | |
1977 | } | |
1978 | ||
1979 | if (ia_valid & ATTR_ATIME) { | |
1980 | dout("setattr %p atime %ld.%ld -> %ld.%ld\n", inode, | |
1981 | inode->i_atime.tv_sec, inode->i_atime.tv_nsec, | |
1982 | attr->ia_atime.tv_sec, attr->ia_atime.tv_nsec); | |
1983 | if (issued & CEPH_CAP_FILE_EXCL) { | |
1984 | ci->i_time_warp_seq++; | |
1985 | inode->i_atime = attr->ia_atime; | |
1986 | dirtied |= CEPH_CAP_FILE_EXCL; | |
1987 | } else if ((issued & CEPH_CAP_FILE_WR) && | |
1988 | timespec_compare(&inode->i_atime, | |
1989 | &attr->ia_atime) < 0) { | |
1990 | inode->i_atime = attr->ia_atime; | |
1991 | dirtied |= CEPH_CAP_FILE_WR; | |
1992 | } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || | |
1993 | !timespec_equal(&inode->i_atime, &attr->ia_atime)) { | |
1994 | ceph_encode_timespec(&req->r_args.setattr.atime, | |
1995 | &attr->ia_atime); | |
1996 | mask |= CEPH_SETATTR_ATIME; | |
1997 | release |= CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_RD | | |
1998 | CEPH_CAP_FILE_WR; | |
1999 | } | |
2000 | } | |
2001 | if (ia_valid & ATTR_MTIME) { | |
2002 | dout("setattr %p mtime %ld.%ld -> %ld.%ld\n", inode, | |
2003 | inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec, | |
2004 | attr->ia_mtime.tv_sec, attr->ia_mtime.tv_nsec); | |
2005 | if (issued & CEPH_CAP_FILE_EXCL) { | |
2006 | ci->i_time_warp_seq++; | |
2007 | inode->i_mtime = attr->ia_mtime; | |
2008 | dirtied |= CEPH_CAP_FILE_EXCL; | |
2009 | } else if ((issued & CEPH_CAP_FILE_WR) && | |
2010 | timespec_compare(&inode->i_mtime, | |
2011 | &attr->ia_mtime) < 0) { | |
2012 | inode->i_mtime = attr->ia_mtime; | |
2013 | dirtied |= CEPH_CAP_FILE_WR; | |
2014 | } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || | |
2015 | !timespec_equal(&inode->i_mtime, &attr->ia_mtime)) { | |
2016 | ceph_encode_timespec(&req->r_args.setattr.mtime, | |
2017 | &attr->ia_mtime); | |
2018 | mask |= CEPH_SETATTR_MTIME; | |
2019 | release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_RD | | |
2020 | CEPH_CAP_FILE_WR; | |
2021 | } | |
2022 | } | |
2023 | if (ia_valid & ATTR_SIZE) { | |
2024 | dout("setattr %p size %lld -> %lld\n", inode, | |
2025 | inode->i_size, attr->ia_size); | |
355da1eb SW |
2026 | if ((issued & CEPH_CAP_FILE_EXCL) && |
2027 | attr->ia_size > inode->i_size) { | |
99c88e69 | 2028 | i_size_write(inode, attr->ia_size); |
224a7542 | 2029 | inode->i_blocks = calc_inode_blocks(attr->ia_size); |
355da1eb SW |
2030 | inode->i_ctime = attr->ia_ctime; |
2031 | ci->i_reported_size = attr->ia_size; | |
2032 | dirtied |= CEPH_CAP_FILE_EXCL; | |
2033 | } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || | |
2034 | attr->ia_size != inode->i_size) { | |
2035 | req->r_args.setattr.size = cpu_to_le64(attr->ia_size); | |
2036 | req->r_args.setattr.old_size = | |
2037 | cpu_to_le64(inode->i_size); | |
2038 | mask |= CEPH_SETATTR_SIZE; | |
2039 | release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_RD | | |
2040 | CEPH_CAP_FILE_WR; | |
2041 | } | |
2042 | } | |
2043 | ||
2044 | /* these do nothing */ | |
2045 | if (ia_valid & ATTR_CTIME) { | |
2046 | bool only = (ia_valid & (ATTR_SIZE|ATTR_MTIME|ATTR_ATIME| | |
2047 | ATTR_MODE|ATTR_UID|ATTR_GID)) == 0; | |
2048 | dout("setattr %p ctime %ld.%ld -> %ld.%ld (%s)\n", inode, | |
2049 | inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec, | |
2050 | attr->ia_ctime.tv_sec, attr->ia_ctime.tv_nsec, | |
2051 | only ? "ctime only" : "ignored"); | |
2052 | inode->i_ctime = attr->ia_ctime; | |
2053 | if (only) { | |
2054 | /* | |
2055 | * if kernel wants to dirty ctime but nothing else, | |
2056 | * we need to choose a cap to dirty under, or do | |
2057 | * a almost-no-op setattr | |
2058 | */ | |
2059 | if (issued & CEPH_CAP_AUTH_EXCL) | |
2060 | dirtied |= CEPH_CAP_AUTH_EXCL; | |
2061 | else if (issued & CEPH_CAP_FILE_EXCL) | |
2062 | dirtied |= CEPH_CAP_FILE_EXCL; | |
2063 | else if (issued & CEPH_CAP_XATTR_EXCL) | |
2064 | dirtied |= CEPH_CAP_XATTR_EXCL; | |
2065 | else | |
2066 | mask |= CEPH_SETATTR_CTIME; | |
2067 | } | |
2068 | } | |
2069 | if (ia_valid & ATTR_FILE) | |
2070 | dout("setattr %p ATTR_FILE ... hrm!\n", inode); | |
2071 | ||
2072 | if (dirtied) { | |
f66fd9f0 YZ |
2073 | inode_dirty_flags = __ceph_mark_dirty_caps(ci, dirtied, |
2074 | &prealloc_cf); | |
8bbd4714 | 2075 | inode->i_ctime = current_fs_time(inode->i_sb); |
355da1eb SW |
2076 | } |
2077 | ||
2078 | release &= issued; | |
be655596 | 2079 | spin_unlock(&ci->i_ceph_lock); |
604d1b02 YZ |
2080 | if (lock_snap_rwsem) |
2081 | up_read(&mdsc->snap_rwsem); | |
355da1eb | 2082 | |
fca65b4a SW |
2083 | if (inode_dirty_flags) |
2084 | __mark_inode_dirty(inode, inode_dirty_flags); | |
2085 | ||
7221fe4c | 2086 | if (ia_valid & ATTR_MODE) { |
4db658ea | 2087 | err = posix_acl_chmod(inode, attr->ia_mode); |
7221fe4c GZ |
2088 | if (err) |
2089 | goto out_put; | |
2090 | } | |
2091 | ||
355da1eb | 2092 | if (mask) { |
70b666c3 SW |
2093 | req->r_inode = inode; |
2094 | ihold(inode); | |
355da1eb SW |
2095 | req->r_inode_drop = release; |
2096 | req->r_args.setattr.mask = cpu_to_le32(mask); | |
2097 | req->r_num_caps = 1; | |
752c8bdc | 2098 | err = ceph_mdsc_do_request(mdsc, NULL, req); |
355da1eb SW |
2099 | } |
2100 | dout("setattr %p result=%d (%s locally, %d remote)\n", inode, err, | |
2101 | ceph_cap_string(dirtied), mask); | |
2102 | ||
2103 | ceph_mdsc_put_request(req); | |
b0d7c223 YZ |
2104 | if (mask & CEPH_SETATTR_SIZE) |
2105 | __ceph_do_pending_vmtruncate(inode); | |
f66fd9f0 | 2106 | ceph_free_cap_flush(prealloc_cf); |
355da1eb | 2107 | return err; |
7221fe4c | 2108 | out_put: |
355da1eb | 2109 | ceph_mdsc_put_request(req); |
f66fd9f0 | 2110 | ceph_free_cap_flush(prealloc_cf); |
355da1eb SW |
2111 | return err; |
2112 | } | |
2113 | ||
a26fecca AG |
2114 | /* |
2115 | * setattr | |
2116 | */ | |
2117 | int ceph_setattr(struct dentry *dentry, struct iattr *attr) | |
2118 | { | |
2119 | return __ceph_setattr(d_inode(dentry), attr); | |
2120 | } | |
2121 | ||
355da1eb SW |
2122 | /* |
2123 | * Verify that we have a lease on the given mask. If not, | |
2124 | * do a getattr against an mds. | |
2125 | */ | |
01deead0 YZ |
2126 | int __ceph_do_getattr(struct inode *inode, struct page *locked_page, |
2127 | int mask, bool force) | |
355da1eb | 2128 | { |
3d14c5d2 YS |
2129 | struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb); |
2130 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
355da1eb SW |
2131 | struct ceph_mds_request *req; |
2132 | int err; | |
2133 | ||
2134 | if (ceph_snap(inode) == CEPH_SNAPDIR) { | |
2135 | dout("do_getattr inode %p SNAPDIR\n", inode); | |
2136 | return 0; | |
2137 | } | |
2138 | ||
01deead0 YZ |
2139 | dout("do_getattr inode %p mask %s mode 0%o\n", |
2140 | inode, ceph_cap_string(mask), inode->i_mode); | |
508b32d8 | 2141 | if (!force && ceph_caps_issued_mask(ceph_inode(inode), mask, 1)) |
355da1eb SW |
2142 | return 0; |
2143 | ||
2144 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS); | |
2145 | if (IS_ERR(req)) | |
2146 | return PTR_ERR(req); | |
70b666c3 SW |
2147 | req->r_inode = inode; |
2148 | ihold(inode); | |
355da1eb SW |
2149 | req->r_num_caps = 1; |
2150 | req->r_args.getattr.mask = cpu_to_le32(mask); | |
01deead0 | 2151 | req->r_locked_page = locked_page; |
355da1eb | 2152 | err = ceph_mdsc_do_request(mdsc, NULL, req); |
01deead0 YZ |
2153 | if (locked_page && err == 0) { |
2154 | u64 inline_version = req->r_reply_info.targeti.inline_version; | |
2155 | if (inline_version == 0) { | |
2156 | /* the reply is supposed to contain inline data */ | |
2157 | err = -EINVAL; | |
2158 | } else if (inline_version == CEPH_INLINE_NONE) { | |
2159 | err = -ENODATA; | |
2160 | } else { | |
2161 | err = req->r_reply_info.targeti.inline_len; | |
2162 | } | |
2163 | } | |
355da1eb SW |
2164 | ceph_mdsc_put_request(req); |
2165 | dout("do_getattr result=%d\n", err); | |
2166 | return err; | |
2167 | } | |
2168 | ||
2169 | ||
2170 | /* | |
2171 | * Check inode permissions. We verify we have a valid value for | |
2172 | * the AUTH cap, then call the generic handler. | |
2173 | */ | |
10556cb2 | 2174 | int ceph_permission(struct inode *inode, int mask) |
355da1eb | 2175 | { |
b74c79e9 NP |
2176 | int err; |
2177 | ||
10556cb2 | 2178 | if (mask & MAY_NOT_BLOCK) |
b74c79e9 NP |
2179 | return -ECHILD; |
2180 | ||
508b32d8 | 2181 | err = ceph_do_getattr(inode, CEPH_CAP_AUTH_SHARED, false); |
355da1eb SW |
2182 | |
2183 | if (!err) | |
2830ba7f | 2184 | err = generic_permission(inode, mask); |
355da1eb SW |
2185 | return err; |
2186 | } | |
2187 | ||
2188 | /* | |
2189 | * Get all attributes. Hopefully somedata we'll have a statlite() | |
2190 | * and can limit the fields we require to be accurate. | |
2191 | */ | |
2192 | int ceph_getattr(struct vfsmount *mnt, struct dentry *dentry, | |
2193 | struct kstat *stat) | |
2194 | { | |
2b0143b5 | 2195 | struct inode *inode = d_inode(dentry); |
232d4b01 | 2196 | struct ceph_inode_info *ci = ceph_inode(inode); |
355da1eb SW |
2197 | int err; |
2198 | ||
508b32d8 | 2199 | err = ceph_do_getattr(inode, CEPH_STAT_CAP_INODE_ALL, false); |
355da1eb SW |
2200 | if (!err) { |
2201 | generic_fillattr(inode, stat); | |
ad1fee96 | 2202 | stat->ino = ceph_translate_ino(inode->i_sb, inode->i_ino); |
355da1eb SW |
2203 | if (ceph_snap(inode) != CEPH_NOSNAP) |
2204 | stat->dev = ceph_snap(inode); | |
2205 | else | |
2206 | stat->dev = 0; | |
232d4b01 | 2207 | if (S_ISDIR(inode->i_mode)) { |
1c1266bb YS |
2208 | if (ceph_test_mount_opt(ceph_sb_to_client(inode->i_sb), |
2209 | RBYTES)) | |
2210 | stat->size = ci->i_rbytes; | |
2211 | else | |
2212 | stat->size = ci->i_files + ci->i_subdirs; | |
232d4b01 | 2213 | stat->blocks = 0; |
355da1eb | 2214 | stat->blksize = 65536; |
232d4b01 | 2215 | } |
355da1eb SW |
2216 | } |
2217 | return err; | |
2218 | } |