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3d14c5d2 | 1 | #include <linux/ceph/ceph_debug.h> |
a8599bd8 SW |
2 | |
3 | #include <linux/fs.h> | |
4 | #include <linux/kernel.h> | |
5 | #include <linux/sched.h> | |
5a0e3ad6 | 6 | #include <linux/slab.h> |
a8599bd8 SW |
7 | #include <linux/vmalloc.h> |
8 | #include <linux/wait.h> | |
f1a3d572 | 9 | #include <linux/writeback.h> |
a8599bd8 SW |
10 | |
11 | #include "super.h" | |
3d14c5d2 | 12 | #include "mds_client.h" |
99ccbd22 | 13 | #include "cache.h" |
3d14c5d2 YS |
14 | #include <linux/ceph/decode.h> |
15 | #include <linux/ceph/messenger.h> | |
a8599bd8 SW |
16 | |
17 | /* | |
18 | * Capability management | |
19 | * | |
20 | * The Ceph metadata servers control client access to inode metadata | |
21 | * and file data by issuing capabilities, granting clients permission | |
22 | * to read and/or write both inode field and file data to OSDs | |
23 | * (storage nodes). Each capability consists of a set of bits | |
24 | * indicating which operations are allowed. | |
25 | * | |
26 | * If the client holds a *_SHARED cap, the client has a coherent value | |
27 | * that can be safely read from the cached inode. | |
28 | * | |
29 | * In the case of a *_EXCL (exclusive) or FILE_WR capabilities, the | |
30 | * client is allowed to change inode attributes (e.g., file size, | |
31 | * mtime), note its dirty state in the ceph_cap, and asynchronously | |
32 | * flush that metadata change to the MDS. | |
33 | * | |
34 | * In the event of a conflicting operation (perhaps by another | |
35 | * client), the MDS will revoke the conflicting client capabilities. | |
36 | * | |
37 | * In order for a client to cache an inode, it must hold a capability | |
38 | * with at least one MDS server. When inodes are released, release | |
39 | * notifications are batched and periodically sent en masse to the MDS | |
40 | * cluster to release server state. | |
41 | */ | |
42 | ||
43 | ||
44 | /* | |
45 | * Generate readable cap strings for debugging output. | |
46 | */ | |
47 | #define MAX_CAP_STR 20 | |
48 | static char cap_str[MAX_CAP_STR][40]; | |
49 | static DEFINE_SPINLOCK(cap_str_lock); | |
50 | static int last_cap_str; | |
51 | ||
52 | static char *gcap_string(char *s, int c) | |
53 | { | |
54 | if (c & CEPH_CAP_GSHARED) | |
55 | *s++ = 's'; | |
56 | if (c & CEPH_CAP_GEXCL) | |
57 | *s++ = 'x'; | |
58 | if (c & CEPH_CAP_GCACHE) | |
59 | *s++ = 'c'; | |
60 | if (c & CEPH_CAP_GRD) | |
61 | *s++ = 'r'; | |
62 | if (c & CEPH_CAP_GWR) | |
63 | *s++ = 'w'; | |
64 | if (c & CEPH_CAP_GBUFFER) | |
65 | *s++ = 'b'; | |
66 | if (c & CEPH_CAP_GLAZYIO) | |
67 | *s++ = 'l'; | |
68 | return s; | |
69 | } | |
70 | ||
71 | const char *ceph_cap_string(int caps) | |
72 | { | |
73 | int i; | |
74 | char *s; | |
75 | int c; | |
76 | ||
77 | spin_lock(&cap_str_lock); | |
78 | i = last_cap_str++; | |
79 | if (last_cap_str == MAX_CAP_STR) | |
80 | last_cap_str = 0; | |
81 | spin_unlock(&cap_str_lock); | |
82 | ||
83 | s = cap_str[i]; | |
84 | ||
85 | if (caps & CEPH_CAP_PIN) | |
86 | *s++ = 'p'; | |
87 | ||
88 | c = (caps >> CEPH_CAP_SAUTH) & 3; | |
89 | if (c) { | |
90 | *s++ = 'A'; | |
91 | s = gcap_string(s, c); | |
92 | } | |
93 | ||
94 | c = (caps >> CEPH_CAP_SLINK) & 3; | |
95 | if (c) { | |
96 | *s++ = 'L'; | |
97 | s = gcap_string(s, c); | |
98 | } | |
99 | ||
100 | c = (caps >> CEPH_CAP_SXATTR) & 3; | |
101 | if (c) { | |
102 | *s++ = 'X'; | |
103 | s = gcap_string(s, c); | |
104 | } | |
105 | ||
106 | c = caps >> CEPH_CAP_SFILE; | |
107 | if (c) { | |
108 | *s++ = 'F'; | |
109 | s = gcap_string(s, c); | |
110 | } | |
111 | ||
112 | if (s == cap_str[i]) | |
113 | *s++ = '-'; | |
114 | *s = 0; | |
115 | return cap_str[i]; | |
116 | } | |
117 | ||
37151668 | 118 | void ceph_caps_init(struct ceph_mds_client *mdsc) |
a8599bd8 | 119 | { |
37151668 YS |
120 | INIT_LIST_HEAD(&mdsc->caps_list); |
121 | spin_lock_init(&mdsc->caps_list_lock); | |
a8599bd8 SW |
122 | } |
123 | ||
37151668 | 124 | void ceph_caps_finalize(struct ceph_mds_client *mdsc) |
a8599bd8 SW |
125 | { |
126 | struct ceph_cap *cap; | |
127 | ||
37151668 YS |
128 | spin_lock(&mdsc->caps_list_lock); |
129 | while (!list_empty(&mdsc->caps_list)) { | |
130 | cap = list_first_entry(&mdsc->caps_list, | |
131 | struct ceph_cap, caps_item); | |
a8599bd8 SW |
132 | list_del(&cap->caps_item); |
133 | kmem_cache_free(ceph_cap_cachep, cap); | |
134 | } | |
37151668 YS |
135 | mdsc->caps_total_count = 0; |
136 | mdsc->caps_avail_count = 0; | |
137 | mdsc->caps_use_count = 0; | |
138 | mdsc->caps_reserve_count = 0; | |
139 | mdsc->caps_min_count = 0; | |
140 | spin_unlock(&mdsc->caps_list_lock); | |
85ccce43 SW |
141 | } |
142 | ||
37151668 | 143 | void ceph_adjust_min_caps(struct ceph_mds_client *mdsc, int delta) |
85ccce43 | 144 | { |
37151668 YS |
145 | spin_lock(&mdsc->caps_list_lock); |
146 | mdsc->caps_min_count += delta; | |
147 | BUG_ON(mdsc->caps_min_count < 0); | |
148 | spin_unlock(&mdsc->caps_list_lock); | |
a8599bd8 SW |
149 | } |
150 | ||
93faca6e | 151 | void ceph_reserve_caps(struct ceph_mds_client *mdsc, |
37151668 | 152 | struct ceph_cap_reservation *ctx, int need) |
a8599bd8 SW |
153 | { |
154 | int i; | |
155 | struct ceph_cap *cap; | |
156 | int have; | |
157 | int alloc = 0; | |
158 | LIST_HEAD(newcaps); | |
a8599bd8 SW |
159 | |
160 | dout("reserve caps ctx=%p need=%d\n", ctx, need); | |
161 | ||
162 | /* first reserve any caps that are already allocated */ | |
37151668 YS |
163 | spin_lock(&mdsc->caps_list_lock); |
164 | if (mdsc->caps_avail_count >= need) | |
a8599bd8 SW |
165 | have = need; |
166 | else | |
37151668 YS |
167 | have = mdsc->caps_avail_count; |
168 | mdsc->caps_avail_count -= have; | |
169 | mdsc->caps_reserve_count += have; | |
170 | BUG_ON(mdsc->caps_total_count != mdsc->caps_use_count + | |
171 | mdsc->caps_reserve_count + | |
172 | mdsc->caps_avail_count); | |
173 | spin_unlock(&mdsc->caps_list_lock); | |
a8599bd8 SW |
174 | |
175 | for (i = have; i < need; i++) { | |
176 | cap = kmem_cache_alloc(ceph_cap_cachep, GFP_NOFS); | |
93faca6e | 177 | if (!cap) |
178 | break; | |
a8599bd8 SW |
179 | list_add(&cap->caps_item, &newcaps); |
180 | alloc++; | |
181 | } | |
93faca6e | 182 | /* we didn't manage to reserve as much as we needed */ |
183 | if (have + alloc != need) | |
184 | pr_warn("reserve caps ctx=%p ENOMEM need=%d got=%d\n", | |
185 | ctx, need, have + alloc); | |
a8599bd8 | 186 | |
37151668 YS |
187 | spin_lock(&mdsc->caps_list_lock); |
188 | mdsc->caps_total_count += alloc; | |
189 | mdsc->caps_reserve_count += alloc; | |
190 | list_splice(&newcaps, &mdsc->caps_list); | |
a8599bd8 | 191 | |
37151668 YS |
192 | BUG_ON(mdsc->caps_total_count != mdsc->caps_use_count + |
193 | mdsc->caps_reserve_count + | |
194 | mdsc->caps_avail_count); | |
195 | spin_unlock(&mdsc->caps_list_lock); | |
a8599bd8 SW |
196 | |
197 | ctx->count = need; | |
198 | dout("reserve caps ctx=%p %d = %d used + %d resv + %d avail\n", | |
37151668 YS |
199 | ctx, mdsc->caps_total_count, mdsc->caps_use_count, |
200 | mdsc->caps_reserve_count, mdsc->caps_avail_count); | |
a8599bd8 SW |
201 | } |
202 | ||
37151668 YS |
203 | int ceph_unreserve_caps(struct ceph_mds_client *mdsc, |
204 | struct ceph_cap_reservation *ctx) | |
a8599bd8 SW |
205 | { |
206 | dout("unreserve caps ctx=%p count=%d\n", ctx, ctx->count); | |
207 | if (ctx->count) { | |
37151668 YS |
208 | spin_lock(&mdsc->caps_list_lock); |
209 | BUG_ON(mdsc->caps_reserve_count < ctx->count); | |
210 | mdsc->caps_reserve_count -= ctx->count; | |
211 | mdsc->caps_avail_count += ctx->count; | |
a8599bd8 SW |
212 | ctx->count = 0; |
213 | dout("unreserve caps %d = %d used + %d resv + %d avail\n", | |
37151668 YS |
214 | mdsc->caps_total_count, mdsc->caps_use_count, |
215 | mdsc->caps_reserve_count, mdsc->caps_avail_count); | |
216 | BUG_ON(mdsc->caps_total_count != mdsc->caps_use_count + | |
217 | mdsc->caps_reserve_count + | |
218 | mdsc->caps_avail_count); | |
219 | spin_unlock(&mdsc->caps_list_lock); | |
a8599bd8 SW |
220 | } |
221 | return 0; | |
222 | } | |
223 | ||
37151668 YS |
224 | static struct ceph_cap *get_cap(struct ceph_mds_client *mdsc, |
225 | struct ceph_cap_reservation *ctx) | |
a8599bd8 SW |
226 | { |
227 | struct ceph_cap *cap = NULL; | |
228 | ||
229 | /* temporary, until we do something about cap import/export */ | |
443b3760 SW |
230 | if (!ctx) { |
231 | cap = kmem_cache_alloc(ceph_cap_cachep, GFP_NOFS); | |
232 | if (cap) { | |
4d1d0534 | 233 | spin_lock(&mdsc->caps_list_lock); |
37151668 YS |
234 | mdsc->caps_use_count++; |
235 | mdsc->caps_total_count++; | |
4d1d0534 | 236 | spin_unlock(&mdsc->caps_list_lock); |
443b3760 SW |
237 | } |
238 | return cap; | |
239 | } | |
a8599bd8 | 240 | |
37151668 | 241 | spin_lock(&mdsc->caps_list_lock); |
a8599bd8 | 242 | dout("get_cap ctx=%p (%d) %d = %d used + %d resv + %d avail\n", |
37151668 YS |
243 | ctx, ctx->count, mdsc->caps_total_count, mdsc->caps_use_count, |
244 | mdsc->caps_reserve_count, mdsc->caps_avail_count); | |
a8599bd8 | 245 | BUG_ON(!ctx->count); |
37151668 YS |
246 | BUG_ON(ctx->count > mdsc->caps_reserve_count); |
247 | BUG_ON(list_empty(&mdsc->caps_list)); | |
a8599bd8 SW |
248 | |
249 | ctx->count--; | |
37151668 YS |
250 | mdsc->caps_reserve_count--; |
251 | mdsc->caps_use_count++; | |
a8599bd8 | 252 | |
37151668 | 253 | cap = list_first_entry(&mdsc->caps_list, struct ceph_cap, caps_item); |
a8599bd8 SW |
254 | list_del(&cap->caps_item); |
255 | ||
37151668 YS |
256 | BUG_ON(mdsc->caps_total_count != mdsc->caps_use_count + |
257 | mdsc->caps_reserve_count + mdsc->caps_avail_count); | |
258 | spin_unlock(&mdsc->caps_list_lock); | |
a8599bd8 SW |
259 | return cap; |
260 | } | |
261 | ||
37151668 | 262 | void ceph_put_cap(struct ceph_mds_client *mdsc, struct ceph_cap *cap) |
a8599bd8 | 263 | { |
37151668 | 264 | spin_lock(&mdsc->caps_list_lock); |
7c1332b8 | 265 | dout("put_cap %p %d = %d used + %d resv + %d avail\n", |
37151668 YS |
266 | cap, mdsc->caps_total_count, mdsc->caps_use_count, |
267 | mdsc->caps_reserve_count, mdsc->caps_avail_count); | |
268 | mdsc->caps_use_count--; | |
a8599bd8 | 269 | /* |
85ccce43 SW |
270 | * Keep some preallocated caps around (ceph_min_count), to |
271 | * avoid lots of free/alloc churn. | |
a8599bd8 | 272 | */ |
37151668 YS |
273 | if (mdsc->caps_avail_count >= mdsc->caps_reserve_count + |
274 | mdsc->caps_min_count) { | |
275 | mdsc->caps_total_count--; | |
a8599bd8 SW |
276 | kmem_cache_free(ceph_cap_cachep, cap); |
277 | } else { | |
37151668 YS |
278 | mdsc->caps_avail_count++; |
279 | list_add(&cap->caps_item, &mdsc->caps_list); | |
a8599bd8 SW |
280 | } |
281 | ||
37151668 YS |
282 | BUG_ON(mdsc->caps_total_count != mdsc->caps_use_count + |
283 | mdsc->caps_reserve_count + mdsc->caps_avail_count); | |
284 | spin_unlock(&mdsc->caps_list_lock); | |
a8599bd8 SW |
285 | } |
286 | ||
3d14c5d2 | 287 | void ceph_reservation_status(struct ceph_fs_client *fsc, |
85ccce43 SW |
288 | int *total, int *avail, int *used, int *reserved, |
289 | int *min) | |
a8599bd8 | 290 | { |
3d14c5d2 | 291 | struct ceph_mds_client *mdsc = fsc->mdsc; |
37151668 | 292 | |
a8599bd8 | 293 | if (total) |
37151668 | 294 | *total = mdsc->caps_total_count; |
a8599bd8 | 295 | if (avail) |
37151668 | 296 | *avail = mdsc->caps_avail_count; |
a8599bd8 | 297 | if (used) |
37151668 | 298 | *used = mdsc->caps_use_count; |
a8599bd8 | 299 | if (reserved) |
37151668 | 300 | *reserved = mdsc->caps_reserve_count; |
85ccce43 | 301 | if (min) |
37151668 | 302 | *min = mdsc->caps_min_count; |
a8599bd8 SW |
303 | } |
304 | ||
305 | /* | |
306 | * Find ceph_cap for given mds, if any. | |
307 | * | |
be655596 | 308 | * Called with i_ceph_lock held. |
a8599bd8 SW |
309 | */ |
310 | static struct ceph_cap *__get_cap_for_mds(struct ceph_inode_info *ci, int mds) | |
311 | { | |
312 | struct ceph_cap *cap; | |
313 | struct rb_node *n = ci->i_caps.rb_node; | |
314 | ||
315 | while (n) { | |
316 | cap = rb_entry(n, struct ceph_cap, ci_node); | |
317 | if (mds < cap->mds) | |
318 | n = n->rb_left; | |
319 | else if (mds > cap->mds) | |
320 | n = n->rb_right; | |
321 | else | |
322 | return cap; | |
323 | } | |
324 | return NULL; | |
325 | } | |
326 | ||
2bc50259 GF |
327 | struct ceph_cap *ceph_get_cap_for_mds(struct ceph_inode_info *ci, int mds) |
328 | { | |
329 | struct ceph_cap *cap; | |
330 | ||
be655596 | 331 | spin_lock(&ci->i_ceph_lock); |
2bc50259 | 332 | cap = __get_cap_for_mds(ci, mds); |
be655596 | 333 | spin_unlock(&ci->i_ceph_lock); |
2bc50259 GF |
334 | return cap; |
335 | } | |
336 | ||
a8599bd8 | 337 | /* |
33caad32 | 338 | * Return id of any MDS with a cap, preferably FILE_WR|BUFFER|EXCL, else -1. |
a8599bd8 | 339 | */ |
ca81f3f6 | 340 | static int __ceph_get_cap_mds(struct ceph_inode_info *ci) |
a8599bd8 SW |
341 | { |
342 | struct ceph_cap *cap; | |
343 | int mds = -1; | |
344 | struct rb_node *p; | |
345 | ||
33caad32 | 346 | /* prefer mds with WR|BUFFER|EXCL caps */ |
a8599bd8 SW |
347 | for (p = rb_first(&ci->i_caps); p; p = rb_next(p)) { |
348 | cap = rb_entry(p, struct ceph_cap, ci_node); | |
349 | mds = cap->mds; | |
a8599bd8 SW |
350 | if (cap->issued & (CEPH_CAP_FILE_WR | |
351 | CEPH_CAP_FILE_BUFFER | | |
352 | CEPH_CAP_FILE_EXCL)) | |
353 | break; | |
354 | } | |
355 | return mds; | |
356 | } | |
357 | ||
358 | int ceph_get_cap_mds(struct inode *inode) | |
359 | { | |
be655596 | 360 | struct ceph_inode_info *ci = ceph_inode(inode); |
a8599bd8 | 361 | int mds; |
be655596 | 362 | spin_lock(&ci->i_ceph_lock); |
ca81f3f6 | 363 | mds = __ceph_get_cap_mds(ceph_inode(inode)); |
be655596 | 364 | spin_unlock(&ci->i_ceph_lock); |
a8599bd8 SW |
365 | return mds; |
366 | } | |
367 | ||
368 | /* | |
be655596 | 369 | * Called under i_ceph_lock. |
a8599bd8 SW |
370 | */ |
371 | static void __insert_cap_node(struct ceph_inode_info *ci, | |
372 | struct ceph_cap *new) | |
373 | { | |
374 | struct rb_node **p = &ci->i_caps.rb_node; | |
375 | struct rb_node *parent = NULL; | |
376 | struct ceph_cap *cap = NULL; | |
377 | ||
378 | while (*p) { | |
379 | parent = *p; | |
380 | cap = rb_entry(parent, struct ceph_cap, ci_node); | |
381 | if (new->mds < cap->mds) | |
382 | p = &(*p)->rb_left; | |
383 | else if (new->mds > cap->mds) | |
384 | p = &(*p)->rb_right; | |
385 | else | |
386 | BUG(); | |
387 | } | |
388 | ||
389 | rb_link_node(&new->ci_node, parent, p); | |
390 | rb_insert_color(&new->ci_node, &ci->i_caps); | |
391 | } | |
392 | ||
393 | /* | |
394 | * (re)set cap hold timeouts, which control the delayed release | |
395 | * of unused caps back to the MDS. Should be called on cap use. | |
396 | */ | |
397 | static void __cap_set_timeouts(struct ceph_mds_client *mdsc, | |
398 | struct ceph_inode_info *ci) | |
399 | { | |
3d14c5d2 | 400 | struct ceph_mount_options *ma = mdsc->fsc->mount_options; |
a8599bd8 SW |
401 | |
402 | ci->i_hold_caps_min = round_jiffies(jiffies + | |
403 | ma->caps_wanted_delay_min * HZ); | |
404 | ci->i_hold_caps_max = round_jiffies(jiffies + | |
405 | ma->caps_wanted_delay_max * HZ); | |
406 | dout("__cap_set_timeouts %p min %lu max %lu\n", &ci->vfs_inode, | |
407 | ci->i_hold_caps_min - jiffies, ci->i_hold_caps_max - jiffies); | |
408 | } | |
409 | ||
410 | /* | |
411 | * (Re)queue cap at the end of the delayed cap release list. | |
412 | * | |
413 | * If I_FLUSH is set, leave the inode at the front of the list. | |
414 | * | |
be655596 | 415 | * Caller holds i_ceph_lock |
a8599bd8 SW |
416 | * -> we take mdsc->cap_delay_lock |
417 | */ | |
418 | static void __cap_delay_requeue(struct ceph_mds_client *mdsc, | |
419 | struct ceph_inode_info *ci) | |
420 | { | |
421 | __cap_set_timeouts(mdsc, ci); | |
422 | dout("__cap_delay_requeue %p flags %d at %lu\n", &ci->vfs_inode, | |
423 | ci->i_ceph_flags, ci->i_hold_caps_max); | |
424 | if (!mdsc->stopping) { | |
425 | spin_lock(&mdsc->cap_delay_lock); | |
426 | if (!list_empty(&ci->i_cap_delay_list)) { | |
427 | if (ci->i_ceph_flags & CEPH_I_FLUSH) | |
428 | goto no_change; | |
429 | list_del_init(&ci->i_cap_delay_list); | |
430 | } | |
431 | list_add_tail(&ci->i_cap_delay_list, &mdsc->cap_delay_list); | |
432 | no_change: | |
433 | spin_unlock(&mdsc->cap_delay_lock); | |
434 | } | |
435 | } | |
436 | ||
437 | /* | |
438 | * Queue an inode for immediate writeback. Mark inode with I_FLUSH, | |
439 | * indicating we should send a cap message to flush dirty metadata | |
440 | * asap, and move to the front of the delayed cap list. | |
441 | */ | |
442 | static void __cap_delay_requeue_front(struct ceph_mds_client *mdsc, | |
443 | struct ceph_inode_info *ci) | |
444 | { | |
445 | dout("__cap_delay_requeue_front %p\n", &ci->vfs_inode); | |
446 | spin_lock(&mdsc->cap_delay_lock); | |
447 | ci->i_ceph_flags |= CEPH_I_FLUSH; | |
448 | if (!list_empty(&ci->i_cap_delay_list)) | |
449 | list_del_init(&ci->i_cap_delay_list); | |
450 | list_add(&ci->i_cap_delay_list, &mdsc->cap_delay_list); | |
451 | spin_unlock(&mdsc->cap_delay_lock); | |
452 | } | |
453 | ||
454 | /* | |
455 | * Cancel delayed work on cap. | |
456 | * | |
be655596 | 457 | * Caller must hold i_ceph_lock. |
a8599bd8 SW |
458 | */ |
459 | static void __cap_delay_cancel(struct ceph_mds_client *mdsc, | |
460 | struct ceph_inode_info *ci) | |
461 | { | |
462 | dout("__cap_delay_cancel %p\n", &ci->vfs_inode); | |
463 | if (list_empty(&ci->i_cap_delay_list)) | |
464 | return; | |
465 | spin_lock(&mdsc->cap_delay_lock); | |
466 | list_del_init(&ci->i_cap_delay_list); | |
467 | spin_unlock(&mdsc->cap_delay_lock); | |
468 | } | |
469 | ||
470 | /* | |
471 | * Common issue checks for add_cap, handle_cap_grant. | |
472 | */ | |
473 | static void __check_cap_issue(struct ceph_inode_info *ci, struct ceph_cap *cap, | |
474 | unsigned issued) | |
475 | { | |
476 | unsigned had = __ceph_caps_issued(ci, NULL); | |
477 | ||
478 | /* | |
479 | * Each time we receive FILE_CACHE anew, we increment | |
480 | * i_rdcache_gen. | |
481 | */ | |
2962507c | 482 | if ((issued & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)) && |
99ccbd22 | 483 | (had & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)) == 0) { |
a8599bd8 | 484 | ci->i_rdcache_gen++; |
99ccbd22 | 485 | } |
a8599bd8 SW |
486 | |
487 | /* | |
2f276c51 | 488 | * if we are newly issued FILE_SHARED, mark dir not complete; we |
a8599bd8 SW |
489 | * don't know what happened to this directory while we didn't |
490 | * have the cap. | |
491 | */ | |
492 | if ((issued & CEPH_CAP_FILE_SHARED) && | |
493 | (had & CEPH_CAP_FILE_SHARED) == 0) { | |
494 | ci->i_shared_gen++; | |
a8673d61 YZ |
495 | if (S_ISDIR(ci->vfs_inode.i_mode)) { |
496 | dout(" marking %p NOT complete\n", &ci->vfs_inode); | |
2f276c51 | 497 | __ceph_dir_clear_complete(ci); |
a8673d61 | 498 | } |
a8599bd8 SW |
499 | } |
500 | } | |
501 | ||
502 | /* | |
503 | * Add a capability under the given MDS session. | |
504 | * | |
505 | * Caller should hold session snap_rwsem (read) and s_mutex. | |
506 | * | |
507 | * @fmode is the open file mode, if we are opening a file, otherwise | |
508 | * it is < 0. (This is so we can atomically add the cap and add an | |
509 | * open file reference to it.) | |
510 | */ | |
511 | int ceph_add_cap(struct inode *inode, | |
512 | struct ceph_mds_session *session, u64 cap_id, | |
513 | int fmode, unsigned issued, unsigned wanted, | |
514 | unsigned seq, unsigned mseq, u64 realmino, int flags, | |
515 | struct ceph_cap_reservation *caps_reservation) | |
516 | { | |
3d14c5d2 | 517 | struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc; |
a8599bd8 SW |
518 | struct ceph_inode_info *ci = ceph_inode(inode); |
519 | struct ceph_cap *new_cap = NULL; | |
520 | struct ceph_cap *cap; | |
521 | int mds = session->s_mds; | |
522 | int actual_wanted; | |
523 | ||
524 | dout("add_cap %p mds%d cap %llx %s seq %d\n", inode, | |
525 | session->s_mds, cap_id, ceph_cap_string(issued), seq); | |
526 | ||
527 | /* | |
528 | * If we are opening the file, include file mode wanted bits | |
529 | * in wanted. | |
530 | */ | |
531 | if (fmode >= 0) | |
532 | wanted |= ceph_caps_for_mode(fmode); | |
533 | ||
534 | retry: | |
be655596 | 535 | spin_lock(&ci->i_ceph_lock); |
a8599bd8 SW |
536 | cap = __get_cap_for_mds(ci, mds); |
537 | if (!cap) { | |
538 | if (new_cap) { | |
539 | cap = new_cap; | |
540 | new_cap = NULL; | |
541 | } else { | |
be655596 | 542 | spin_unlock(&ci->i_ceph_lock); |
37151668 | 543 | new_cap = get_cap(mdsc, caps_reservation); |
a8599bd8 SW |
544 | if (new_cap == NULL) |
545 | return -ENOMEM; | |
546 | goto retry; | |
547 | } | |
548 | ||
549 | cap->issued = 0; | |
550 | cap->implemented = 0; | |
551 | cap->mds = mds; | |
552 | cap->mds_wanted = 0; | |
964266cc | 553 | cap->mseq = 0; |
a8599bd8 SW |
554 | |
555 | cap->ci = ci; | |
556 | __insert_cap_node(ci, cap); | |
557 | ||
a8599bd8 SW |
558 | /* add to session cap list */ |
559 | cap->session = session; | |
560 | spin_lock(&session->s_cap_lock); | |
561 | list_add_tail(&cap->session_caps, &session->s_caps); | |
562 | session->s_nr_caps++; | |
563 | spin_unlock(&session->s_cap_lock); | |
11df2dfb YZ |
564 | } else { |
565 | if (new_cap) | |
566 | ceph_put_cap(mdsc, new_cap); | |
567 | ||
568 | /* | |
569 | * auth mds of the inode changed. we received the cap export | |
570 | * message, but still haven't received the cap import message. | |
571 | * handle_cap_export() updated the new auth MDS' cap. | |
572 | * | |
573 | * "ceph_seq_cmp(seq, cap->seq) <= 0" means we are processing | |
574 | * a message that was send before the cap import message. So | |
575 | * don't remove caps. | |
576 | */ | |
577 | if (ceph_seq_cmp(seq, cap->seq) <= 0) { | |
578 | WARN_ON(cap != ci->i_auth_cap); | |
579 | WARN_ON(cap->cap_id != cap_id); | |
580 | seq = cap->seq; | |
581 | mseq = cap->mseq; | |
582 | issued |= cap->issued; | |
583 | flags |= CEPH_CAP_FLAG_AUTH; | |
584 | } | |
585 | } | |
a8599bd8 SW |
586 | |
587 | if (!ci->i_snap_realm) { | |
588 | /* | |
589 | * add this inode to the appropriate snap realm | |
590 | */ | |
591 | struct ceph_snap_realm *realm = ceph_lookup_snap_realm(mdsc, | |
592 | realmino); | |
593 | if (realm) { | |
594 | ceph_get_snap_realm(mdsc, realm); | |
595 | spin_lock(&realm->inodes_with_caps_lock); | |
596 | ci->i_snap_realm = realm; | |
597 | list_add(&ci->i_snap_realm_item, | |
598 | &realm->inodes_with_caps); | |
599 | spin_unlock(&realm->inodes_with_caps_lock); | |
600 | } else { | |
601 | pr_err("ceph_add_cap: couldn't find snap realm %llx\n", | |
602 | realmino); | |
b8cd07e7 | 603 | WARN_ON(!realm); |
a8599bd8 SW |
604 | } |
605 | } | |
606 | ||
607 | __check_cap_issue(ci, cap, issued); | |
608 | ||
609 | /* | |
610 | * If we are issued caps we don't want, or the mds' wanted | |
611 | * value appears to be off, queue a check so we'll release | |
612 | * later and/or update the mds wanted value. | |
613 | */ | |
614 | actual_wanted = __ceph_caps_wanted(ci); | |
615 | if ((wanted & ~actual_wanted) || | |
616 | (issued & ~actual_wanted & CEPH_CAP_ANY_WR)) { | |
617 | dout(" issued %s, mds wanted %s, actual %s, queueing\n", | |
618 | ceph_cap_string(issued), ceph_cap_string(wanted), | |
619 | ceph_cap_string(actual_wanted)); | |
620 | __cap_delay_requeue(mdsc, ci); | |
621 | } | |
622 | ||
b8c2f3ae YZ |
623 | if (flags & CEPH_CAP_FLAG_AUTH) { |
624 | if (ci->i_auth_cap == NULL || | |
d9ffc4f7 | 625 | ceph_seq_cmp(ci->i_auth_cap->mseq, mseq) < 0) { |
b8c2f3ae | 626 | ci->i_auth_cap = cap; |
d9ffc4f7 YZ |
627 | cap->mds_wanted = wanted; |
628 | } | |
4ee6a914 | 629 | ci->i_cap_exporting_issued = 0; |
11df2dfb YZ |
630 | } else { |
631 | WARN_ON(ci->i_auth_cap == cap); | |
8a92a119 | 632 | } |
a8599bd8 SW |
633 | |
634 | dout("add_cap inode %p (%llx.%llx) cap %p %s now %s seq %d mds%d\n", | |
635 | inode, ceph_vinop(inode), cap, ceph_cap_string(issued), | |
636 | ceph_cap_string(issued|cap->issued), seq, mds); | |
637 | cap->cap_id = cap_id; | |
638 | cap->issued = issued; | |
639 | cap->implemented |= issued; | |
d1b87809 | 640 | if (ceph_seq_cmp(mseq, cap->mseq) > 0) |
964266cc YZ |
641 | cap->mds_wanted = wanted; |
642 | else | |
643 | cap->mds_wanted |= wanted; | |
a8599bd8 SW |
644 | cap->seq = seq; |
645 | cap->issue_seq = seq; | |
646 | cap->mseq = mseq; | |
685f9a5d | 647 | cap->cap_gen = session->s_cap_gen; |
a8599bd8 SW |
648 | |
649 | if (fmode >= 0) | |
650 | __ceph_get_fmode(ci, fmode); | |
be655596 | 651 | spin_unlock(&ci->i_ceph_lock); |
03066f23 | 652 | wake_up_all(&ci->i_cap_wq); |
a8599bd8 SW |
653 | return 0; |
654 | } | |
655 | ||
656 | /* | |
657 | * Return true if cap has not timed out and belongs to the current | |
658 | * generation of the MDS session (i.e. has not gone 'stale' due to | |
659 | * us losing touch with the mds). | |
660 | */ | |
661 | static int __cap_is_valid(struct ceph_cap *cap) | |
662 | { | |
663 | unsigned long ttl; | |
cdac8303 | 664 | u32 gen; |
a8599bd8 | 665 | |
d8fb02ab | 666 | spin_lock(&cap->session->s_gen_ttl_lock); |
a8599bd8 SW |
667 | gen = cap->session->s_cap_gen; |
668 | ttl = cap->session->s_cap_ttl; | |
d8fb02ab | 669 | spin_unlock(&cap->session->s_gen_ttl_lock); |
a8599bd8 | 670 | |
685f9a5d | 671 | if (cap->cap_gen < gen || time_after_eq(jiffies, ttl)) { |
a8599bd8 SW |
672 | dout("__cap_is_valid %p cap %p issued %s " |
673 | "but STALE (gen %u vs %u)\n", &cap->ci->vfs_inode, | |
685f9a5d | 674 | cap, ceph_cap_string(cap->issued), cap->cap_gen, gen); |
a8599bd8 SW |
675 | return 0; |
676 | } | |
677 | ||
678 | return 1; | |
679 | } | |
680 | ||
681 | /* | |
682 | * Return set of valid cap bits issued to us. Note that caps time | |
683 | * out, and may be invalidated in bulk if the client session times out | |
684 | * and session->s_cap_gen is bumped. | |
685 | */ | |
686 | int __ceph_caps_issued(struct ceph_inode_info *ci, int *implemented) | |
687 | { | |
7af8f1e4 | 688 | int have = ci->i_snap_caps | ci->i_cap_exporting_issued; |
a8599bd8 SW |
689 | struct ceph_cap *cap; |
690 | struct rb_node *p; | |
691 | ||
692 | if (implemented) | |
693 | *implemented = 0; | |
694 | for (p = rb_first(&ci->i_caps); p; p = rb_next(p)) { | |
695 | cap = rb_entry(p, struct ceph_cap, ci_node); | |
696 | if (!__cap_is_valid(cap)) | |
697 | continue; | |
698 | dout("__ceph_caps_issued %p cap %p issued %s\n", | |
699 | &ci->vfs_inode, cap, ceph_cap_string(cap->issued)); | |
700 | have |= cap->issued; | |
701 | if (implemented) | |
702 | *implemented |= cap->implemented; | |
703 | } | |
b1530f57 YZ |
704 | /* |
705 | * exclude caps issued by non-auth MDS, but are been revoking | |
706 | * by the auth MDS. The non-auth MDS should be revoking/exporting | |
707 | * these caps, but the message is delayed. | |
708 | */ | |
709 | if (ci->i_auth_cap) { | |
710 | cap = ci->i_auth_cap; | |
711 | have &= ~cap->implemented | cap->issued; | |
712 | } | |
a8599bd8 SW |
713 | return have; |
714 | } | |
715 | ||
716 | /* | |
717 | * Get cap bits issued by caps other than @ocap | |
718 | */ | |
719 | int __ceph_caps_issued_other(struct ceph_inode_info *ci, struct ceph_cap *ocap) | |
720 | { | |
721 | int have = ci->i_snap_caps; | |
722 | struct ceph_cap *cap; | |
723 | struct rb_node *p; | |
724 | ||
725 | for (p = rb_first(&ci->i_caps); p; p = rb_next(p)) { | |
726 | cap = rb_entry(p, struct ceph_cap, ci_node); | |
727 | if (cap == ocap) | |
728 | continue; | |
729 | if (!__cap_is_valid(cap)) | |
730 | continue; | |
731 | have |= cap->issued; | |
732 | } | |
733 | return have; | |
734 | } | |
735 | ||
736 | /* | |
737 | * Move a cap to the end of the LRU (oldest caps at list head, newest | |
738 | * at list tail). | |
739 | */ | |
740 | static void __touch_cap(struct ceph_cap *cap) | |
741 | { | |
742 | struct ceph_mds_session *s = cap->session; | |
743 | ||
a8599bd8 | 744 | spin_lock(&s->s_cap_lock); |
7c1332b8 | 745 | if (s->s_cap_iterator == NULL) { |
5dacf091 SW |
746 | dout("__touch_cap %p cap %p mds%d\n", &cap->ci->vfs_inode, cap, |
747 | s->s_mds); | |
748 | list_move_tail(&cap->session_caps, &s->s_caps); | |
749 | } else { | |
750 | dout("__touch_cap %p cap %p mds%d NOP, iterating over caps\n", | |
751 | &cap->ci->vfs_inode, cap, s->s_mds); | |
752 | } | |
a8599bd8 SW |
753 | spin_unlock(&s->s_cap_lock); |
754 | } | |
755 | ||
756 | /* | |
757 | * Check if we hold the given mask. If so, move the cap(s) to the | |
758 | * front of their respective LRUs. (This is the preferred way for | |
759 | * callers to check for caps they want.) | |
760 | */ | |
761 | int __ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask, int touch) | |
762 | { | |
763 | struct ceph_cap *cap; | |
764 | struct rb_node *p; | |
765 | int have = ci->i_snap_caps; | |
766 | ||
767 | if ((have & mask) == mask) { | |
768 | dout("__ceph_caps_issued_mask %p snap issued %s" | |
769 | " (mask %s)\n", &ci->vfs_inode, | |
770 | ceph_cap_string(have), | |
771 | ceph_cap_string(mask)); | |
772 | return 1; | |
773 | } | |
774 | ||
775 | for (p = rb_first(&ci->i_caps); p; p = rb_next(p)) { | |
776 | cap = rb_entry(p, struct ceph_cap, ci_node); | |
777 | if (!__cap_is_valid(cap)) | |
778 | continue; | |
779 | if ((cap->issued & mask) == mask) { | |
780 | dout("__ceph_caps_issued_mask %p cap %p issued %s" | |
781 | " (mask %s)\n", &ci->vfs_inode, cap, | |
782 | ceph_cap_string(cap->issued), | |
783 | ceph_cap_string(mask)); | |
784 | if (touch) | |
785 | __touch_cap(cap); | |
786 | return 1; | |
787 | } | |
788 | ||
789 | /* does a combination of caps satisfy mask? */ | |
790 | have |= cap->issued; | |
791 | if ((have & mask) == mask) { | |
792 | dout("__ceph_caps_issued_mask %p combo issued %s" | |
793 | " (mask %s)\n", &ci->vfs_inode, | |
794 | ceph_cap_string(cap->issued), | |
795 | ceph_cap_string(mask)); | |
796 | if (touch) { | |
797 | struct rb_node *q; | |
798 | ||
25985edc | 799 | /* touch this + preceding caps */ |
a8599bd8 SW |
800 | __touch_cap(cap); |
801 | for (q = rb_first(&ci->i_caps); q != p; | |
802 | q = rb_next(q)) { | |
803 | cap = rb_entry(q, struct ceph_cap, | |
804 | ci_node); | |
805 | if (!__cap_is_valid(cap)) | |
806 | continue; | |
807 | __touch_cap(cap); | |
808 | } | |
809 | } | |
810 | return 1; | |
811 | } | |
812 | } | |
813 | ||
814 | return 0; | |
815 | } | |
816 | ||
817 | /* | |
818 | * Return true if mask caps are currently being revoked by an MDS. | |
819 | */ | |
6ee6b953 YZ |
820 | int __ceph_caps_revoking_other(struct ceph_inode_info *ci, |
821 | struct ceph_cap *ocap, int mask) | |
a8599bd8 | 822 | { |
a8599bd8 SW |
823 | struct ceph_cap *cap; |
824 | struct rb_node *p; | |
a8599bd8 | 825 | |
a8599bd8 SW |
826 | for (p = rb_first(&ci->i_caps); p; p = rb_next(p)) { |
827 | cap = rb_entry(p, struct ceph_cap, ci_node); | |
9563f88c | 828 | if (cap != ocap && |
6ee6b953 YZ |
829 | (cap->implemented & ~cap->issued & mask)) |
830 | return 1; | |
a8599bd8 | 831 | } |
6ee6b953 YZ |
832 | return 0; |
833 | } | |
834 | ||
835 | int ceph_caps_revoking(struct ceph_inode_info *ci, int mask) | |
836 | { | |
837 | struct inode *inode = &ci->vfs_inode; | |
838 | int ret; | |
839 | ||
840 | spin_lock(&ci->i_ceph_lock); | |
841 | ret = __ceph_caps_revoking_other(ci, NULL, mask); | |
be655596 | 842 | spin_unlock(&ci->i_ceph_lock); |
a8599bd8 SW |
843 | dout("ceph_caps_revoking %p %s = %d\n", inode, |
844 | ceph_cap_string(mask), ret); | |
845 | return ret; | |
846 | } | |
847 | ||
848 | int __ceph_caps_used(struct ceph_inode_info *ci) | |
849 | { | |
850 | int used = 0; | |
851 | if (ci->i_pin_ref) | |
852 | used |= CEPH_CAP_PIN; | |
853 | if (ci->i_rd_ref) | |
854 | used |= CEPH_CAP_FILE_RD; | |
a43fb731 | 855 | if (ci->i_rdcache_ref || ci->vfs_inode.i_data.nrpages) |
a8599bd8 SW |
856 | used |= CEPH_CAP_FILE_CACHE; |
857 | if (ci->i_wr_ref) | |
858 | used |= CEPH_CAP_FILE_WR; | |
d3d0720d | 859 | if (ci->i_wb_ref || ci->i_wrbuffer_ref) |
a8599bd8 SW |
860 | used |= CEPH_CAP_FILE_BUFFER; |
861 | return used; | |
862 | } | |
863 | ||
864 | /* | |
865 | * wanted, by virtue of open file modes | |
866 | */ | |
867 | int __ceph_caps_file_wanted(struct ceph_inode_info *ci) | |
868 | { | |
869 | int want = 0; | |
870 | int mode; | |
33caad32 | 871 | for (mode = 0; mode < CEPH_FILE_MODE_NUM; mode++) |
a8599bd8 SW |
872 | if (ci->i_nr_by_mode[mode]) |
873 | want |= ceph_caps_for_mode(mode); | |
874 | return want; | |
875 | } | |
876 | ||
877 | /* | |
878 | * Return caps we have registered with the MDS(s) as 'wanted'. | |
879 | */ | |
880 | int __ceph_caps_mds_wanted(struct ceph_inode_info *ci) | |
881 | { | |
882 | struct ceph_cap *cap; | |
883 | struct rb_node *p; | |
884 | int mds_wanted = 0; | |
885 | ||
886 | for (p = rb_first(&ci->i_caps); p; p = rb_next(p)) { | |
887 | cap = rb_entry(p, struct ceph_cap, ci_node); | |
888 | if (!__cap_is_valid(cap)) | |
889 | continue; | |
a2550604 YZ |
890 | if (cap == ci->i_auth_cap) |
891 | mds_wanted |= cap->mds_wanted; | |
892 | else | |
893 | mds_wanted |= (cap->mds_wanted & ~CEPH_CAP_ANY_FILE_WR); | |
a8599bd8 SW |
894 | } |
895 | return mds_wanted; | |
896 | } | |
897 | ||
898 | /* | |
be655596 | 899 | * called under i_ceph_lock |
a8599bd8 SW |
900 | */ |
901 | static int __ceph_is_any_caps(struct ceph_inode_info *ci) | |
902 | { | |
11df2dfb | 903 | return !RB_EMPTY_ROOT(&ci->i_caps) || ci->i_cap_exporting_issued; |
a8599bd8 SW |
904 | } |
905 | ||
9215aeea YZ |
906 | int ceph_is_any_caps(struct inode *inode) |
907 | { | |
908 | struct ceph_inode_info *ci = ceph_inode(inode); | |
909 | int ret; | |
910 | ||
911 | spin_lock(&ci->i_ceph_lock); | |
912 | ret = __ceph_is_any_caps(ci); | |
913 | spin_unlock(&ci->i_ceph_lock); | |
914 | ||
915 | return ret; | |
916 | } | |
917 | ||
a8599bd8 | 918 | /* |
f818a736 SW |
919 | * Remove a cap. Take steps to deal with a racing iterate_session_caps. |
920 | * | |
be655596 | 921 | * caller should hold i_ceph_lock. |
a6369741 | 922 | * caller will not hold session s_mutex if called from destroy_inode. |
a8599bd8 | 923 | */ |
a096b09a | 924 | void __ceph_remove_cap(struct ceph_cap *cap, bool queue_release) |
a8599bd8 SW |
925 | { |
926 | struct ceph_mds_session *session = cap->session; | |
927 | struct ceph_inode_info *ci = cap->ci; | |
640ef79d | 928 | struct ceph_mds_client *mdsc = |
3d14c5d2 | 929 | ceph_sb_to_client(ci->vfs_inode.i_sb)->mdsc; |
f818a736 | 930 | int removed = 0; |
a8599bd8 SW |
931 | |
932 | dout("__ceph_remove_cap %p from %p\n", cap, &ci->vfs_inode); | |
933 | ||
7c1332b8 SW |
934 | /* remove from session list */ |
935 | spin_lock(&session->s_cap_lock); | |
99a9c273 YZ |
936 | /* |
937 | * s_cap_reconnect is protected by s_cap_lock. no one changes | |
938 | * s_cap_gen while session is in the reconnect state. | |
939 | */ | |
940 | if (queue_release && | |
941 | (!session->s_cap_reconnect || | |
942 | cap->cap_gen == session->s_cap_gen)) | |
a096b09a YZ |
943 | __queue_cap_release(session, ci->i_vino.ino, cap->cap_id, |
944 | cap->mseq, cap->issue_seq); | |
945 | ||
7c1332b8 SW |
946 | if (session->s_cap_iterator == cap) { |
947 | /* not yet, we are iterating over this very cap */ | |
948 | dout("__ceph_remove_cap delaying %p removal from session %p\n", | |
949 | cap, cap->session); | |
950 | } else { | |
951 | list_del_init(&cap->session_caps); | |
952 | session->s_nr_caps--; | |
953 | cap->session = NULL; | |
f818a736 | 954 | removed = 1; |
7c1332b8 | 955 | } |
f818a736 SW |
956 | /* protect backpointer with s_cap_lock: see iterate_session_caps */ |
957 | cap->ci = NULL; | |
7c1332b8 SW |
958 | spin_unlock(&session->s_cap_lock); |
959 | ||
f818a736 SW |
960 | /* remove from inode list */ |
961 | rb_erase(&cap->ci_node, &ci->i_caps); | |
962 | if (ci->i_auth_cap == cap) | |
963 | ci->i_auth_cap = NULL; | |
964 | ||
965 | if (removed) | |
37151668 | 966 | ceph_put_cap(mdsc, cap); |
a8599bd8 SW |
967 | |
968 | if (!__ceph_is_any_caps(ci) && ci->i_snap_realm) { | |
969 | struct ceph_snap_realm *realm = ci->i_snap_realm; | |
970 | spin_lock(&realm->inodes_with_caps_lock); | |
971 | list_del_init(&ci->i_snap_realm_item); | |
972 | ci->i_snap_realm_counter++; | |
973 | ci->i_snap_realm = NULL; | |
974 | spin_unlock(&realm->inodes_with_caps_lock); | |
975 | ceph_put_snap_realm(mdsc, realm); | |
976 | } | |
977 | if (!__ceph_is_any_real_caps(ci)) | |
978 | __cap_delay_cancel(mdsc, ci); | |
979 | } | |
980 | ||
981 | /* | |
982 | * Build and send a cap message to the given MDS. | |
983 | * | |
984 | * Caller should be holding s_mutex. | |
985 | */ | |
986 | static int send_cap_msg(struct ceph_mds_session *session, | |
987 | u64 ino, u64 cid, int op, | |
988 | int caps, int wanted, int dirty, | |
989 | u32 seq, u64 flush_tid, u32 issue_seq, u32 mseq, | |
990 | u64 size, u64 max_size, | |
991 | struct timespec *mtime, struct timespec *atime, | |
992 | u64 time_warp_seq, | |
05cb11c1 | 993 | kuid_t uid, kgid_t gid, umode_t mode, |
a8599bd8 SW |
994 | u64 xattr_version, |
995 | struct ceph_buffer *xattrs_buf, | |
996 | u64 follows) | |
997 | { | |
998 | struct ceph_mds_caps *fc; | |
999 | struct ceph_msg *msg; | |
1000 | ||
1001 | dout("send_cap_msg %s %llx %llx caps %s wanted %s dirty %s" | |
1002 | " seq %u/%u mseq %u follows %lld size %llu/%llu" | |
1003 | " xattr_ver %llu xattr_len %d\n", ceph_cap_op_name(op), | |
1004 | cid, ino, ceph_cap_string(caps), ceph_cap_string(wanted), | |
1005 | ceph_cap_string(dirty), | |
1006 | seq, issue_seq, mseq, follows, size, max_size, | |
1007 | xattr_version, xattrs_buf ? (int)xattrs_buf->vec.iov_len : 0); | |
1008 | ||
b61c2763 | 1009 | msg = ceph_msg_new(CEPH_MSG_CLIENT_CAPS, sizeof(*fc), GFP_NOFS, false); |
a79832f2 SW |
1010 | if (!msg) |
1011 | return -ENOMEM; | |
a8599bd8 | 1012 | |
6df058c0 | 1013 | msg->hdr.tid = cpu_to_le64(flush_tid); |
a8599bd8 | 1014 | |
6df058c0 | 1015 | fc = msg->front.iov_base; |
a8599bd8 SW |
1016 | memset(fc, 0, sizeof(*fc)); |
1017 | ||
1018 | fc->cap_id = cpu_to_le64(cid); | |
1019 | fc->op = cpu_to_le32(op); | |
1020 | fc->seq = cpu_to_le32(seq); | |
a8599bd8 SW |
1021 | fc->issue_seq = cpu_to_le32(issue_seq); |
1022 | fc->migrate_seq = cpu_to_le32(mseq); | |
1023 | fc->caps = cpu_to_le32(caps); | |
1024 | fc->wanted = cpu_to_le32(wanted); | |
1025 | fc->dirty = cpu_to_le32(dirty); | |
1026 | fc->ino = cpu_to_le64(ino); | |
1027 | fc->snap_follows = cpu_to_le64(follows); | |
1028 | ||
1029 | fc->size = cpu_to_le64(size); | |
1030 | fc->max_size = cpu_to_le64(max_size); | |
1031 | if (mtime) | |
1032 | ceph_encode_timespec(&fc->mtime, mtime); | |
1033 | if (atime) | |
1034 | ceph_encode_timespec(&fc->atime, atime); | |
1035 | fc->time_warp_seq = cpu_to_le32(time_warp_seq); | |
1036 | ||
05cb11c1 EB |
1037 | fc->uid = cpu_to_le32(from_kuid(&init_user_ns, uid)); |
1038 | fc->gid = cpu_to_le32(from_kgid(&init_user_ns, gid)); | |
a8599bd8 SW |
1039 | fc->mode = cpu_to_le32(mode); |
1040 | ||
1041 | fc->xattr_version = cpu_to_le64(xattr_version); | |
1042 | if (xattrs_buf) { | |
1043 | msg->middle = ceph_buffer_get(xattrs_buf); | |
1044 | fc->xattr_len = cpu_to_le32(xattrs_buf->vec.iov_len); | |
1045 | msg->hdr.middle_len = cpu_to_le32(xattrs_buf->vec.iov_len); | |
1046 | } | |
1047 | ||
1048 | ceph_con_send(&session->s_con, msg); | |
1049 | return 0; | |
1050 | } | |
1051 | ||
d40ee0dc YZ |
1052 | void __queue_cap_release(struct ceph_mds_session *session, |
1053 | u64 ino, u64 cap_id, u32 migrate_seq, | |
1054 | u32 issue_seq) | |
3d7ded4d SW |
1055 | { |
1056 | struct ceph_msg *msg; | |
1057 | struct ceph_mds_cap_release *head; | |
1058 | struct ceph_mds_cap_item *item; | |
1059 | ||
3d7ded4d SW |
1060 | BUG_ON(!session->s_num_cap_releases); |
1061 | msg = list_first_entry(&session->s_cap_releases, | |
1062 | struct ceph_msg, list_head); | |
1063 | ||
1064 | dout(" adding %llx release to mds%d msg %p (%d left)\n", | |
1065 | ino, session->s_mds, msg, session->s_num_cap_releases); | |
1066 | ||
1067 | BUG_ON(msg->front.iov_len + sizeof(*item) > PAGE_CACHE_SIZE); | |
1068 | head = msg->front.iov_base; | |
b905a7f8 | 1069 | le32_add_cpu(&head->num, 1); |
3d7ded4d SW |
1070 | item = msg->front.iov_base + msg->front.iov_len; |
1071 | item->ino = cpu_to_le64(ino); | |
1072 | item->cap_id = cpu_to_le64(cap_id); | |
1073 | item->migrate_seq = cpu_to_le32(migrate_seq); | |
1074 | item->seq = cpu_to_le32(issue_seq); | |
1075 | ||
1076 | session->s_num_cap_releases--; | |
1077 | ||
1078 | msg->front.iov_len += sizeof(*item); | |
1079 | if (le32_to_cpu(head->num) == CEPH_CAPS_PER_RELEASE) { | |
1080 | dout(" release msg %p full\n", msg); | |
1081 | list_move_tail(&msg->list_head, &session->s_cap_releases_done); | |
1082 | } else { | |
1083 | dout(" release msg %p at %d/%d (%d)\n", msg, | |
1084 | (int)le32_to_cpu(head->num), | |
1085 | (int)CEPH_CAPS_PER_RELEASE, | |
1086 | (int)msg->front.iov_len); | |
1087 | } | |
3d7ded4d SW |
1088 | } |
1089 | ||
a8599bd8 | 1090 | /* |
a6369741 | 1091 | * Queue cap releases when an inode is dropped from our cache. Since |
be655596 | 1092 | * inode is about to be destroyed, there is no need for i_ceph_lock. |
a8599bd8 SW |
1093 | */ |
1094 | void ceph_queue_caps_release(struct inode *inode) | |
1095 | { | |
1096 | struct ceph_inode_info *ci = ceph_inode(inode); | |
1097 | struct rb_node *p; | |
1098 | ||
a8599bd8 SW |
1099 | p = rb_first(&ci->i_caps); |
1100 | while (p) { | |
1101 | struct ceph_cap *cap = rb_entry(p, struct ceph_cap, ci_node); | |
a8599bd8 | 1102 | p = rb_next(p); |
a096b09a | 1103 | __ceph_remove_cap(cap, true); |
a8599bd8 | 1104 | } |
a8599bd8 SW |
1105 | } |
1106 | ||
1107 | /* | |
1108 | * Send a cap msg on the given inode. Update our caps state, then | |
be655596 | 1109 | * drop i_ceph_lock and send the message. |
a8599bd8 SW |
1110 | * |
1111 | * Make note of max_size reported/requested from mds, revoked caps | |
1112 | * that have now been implemented. | |
1113 | * | |
1114 | * Make half-hearted attempt ot to invalidate page cache if we are | |
1115 | * dropping RDCACHE. Note that this will leave behind locked pages | |
1116 | * that we'll then need to deal with elsewhere. | |
1117 | * | |
1118 | * Return non-zero if delayed release, or we experienced an error | |
1119 | * such that the caller should requeue + retry later. | |
1120 | * | |
be655596 | 1121 | * called with i_ceph_lock, then drops it. |
a8599bd8 SW |
1122 | * caller should hold snap_rwsem (read), s_mutex. |
1123 | */ | |
1124 | static int __send_cap(struct ceph_mds_client *mdsc, struct ceph_cap *cap, | |
1125 | int op, int used, int want, int retain, int flushing, | |
1126 | unsigned *pflush_tid) | |
be655596 | 1127 | __releases(cap->ci->i_ceph_lock) |
a8599bd8 SW |
1128 | { |
1129 | struct ceph_inode_info *ci = cap->ci; | |
1130 | struct inode *inode = &ci->vfs_inode; | |
1131 | u64 cap_id = cap->cap_id; | |
68c28323 | 1132 | int held, revoking, dropping, keep; |
a8599bd8 SW |
1133 | u64 seq, issue_seq, mseq, time_warp_seq, follows; |
1134 | u64 size, max_size; | |
1135 | struct timespec mtime, atime; | |
1136 | int wake = 0; | |
5706b27d | 1137 | umode_t mode; |
05cb11c1 EB |
1138 | kuid_t uid; |
1139 | kgid_t gid; | |
a8599bd8 SW |
1140 | struct ceph_mds_session *session; |
1141 | u64 xattr_version = 0; | |
082afec9 | 1142 | struct ceph_buffer *xattr_blob = NULL; |
a8599bd8 SW |
1143 | int delayed = 0; |
1144 | u64 flush_tid = 0; | |
1145 | int i; | |
1146 | int ret; | |
1147 | ||
68c28323 SW |
1148 | held = cap->issued | cap->implemented; |
1149 | revoking = cap->implemented & ~cap->issued; | |
1150 | retain &= ~revoking; | |
1151 | dropping = cap->issued & ~retain; | |
1152 | ||
a8599bd8 SW |
1153 | dout("__send_cap %p cap %p session %p %s -> %s (revoking %s)\n", |
1154 | inode, cap, cap->session, | |
1155 | ceph_cap_string(held), ceph_cap_string(held & retain), | |
1156 | ceph_cap_string(revoking)); | |
1157 | BUG_ON((retain & CEPH_CAP_PIN) == 0); | |
1158 | ||
1159 | session = cap->session; | |
1160 | ||
1161 | /* don't release wanted unless we've waited a bit. */ | |
1162 | if ((ci->i_ceph_flags & CEPH_I_NODELAY) == 0 && | |
1163 | time_before(jiffies, ci->i_hold_caps_min)) { | |
1164 | dout(" delaying issued %s -> %s, wanted %s -> %s on send\n", | |
1165 | ceph_cap_string(cap->issued), | |
1166 | ceph_cap_string(cap->issued & retain), | |
1167 | ceph_cap_string(cap->mds_wanted), | |
1168 | ceph_cap_string(want)); | |
1169 | want |= cap->mds_wanted; | |
1170 | retain |= cap->issued; | |
1171 | delayed = 1; | |
1172 | } | |
1173 | ci->i_ceph_flags &= ~(CEPH_I_NODELAY | CEPH_I_FLUSH); | |
1174 | ||
1175 | cap->issued &= retain; /* drop bits we don't want */ | |
1176 | if (cap->implemented & ~cap->issued) { | |
1177 | /* | |
1178 | * Wake up any waiters on wanted -> needed transition. | |
1179 | * This is due to the weird transition from buffered | |
1180 | * to sync IO... we need to flush dirty pages _before_ | |
1181 | * allowing sync writes to avoid reordering. | |
1182 | */ | |
1183 | wake = 1; | |
1184 | } | |
1185 | cap->implemented &= cap->issued | used; | |
1186 | cap->mds_wanted = want; | |
1187 | ||
1188 | if (flushing) { | |
1189 | /* | |
1190 | * assign a tid for flush operations so we can avoid | |
1191 | * flush1 -> dirty1 -> flush2 -> flushack1 -> mark | |
1192 | * clean type races. track latest tid for every bit | |
1193 | * so we can handle flush AxFw, flush Fw, and have the | |
1194 | * first ack clean Ax. | |
1195 | */ | |
1196 | flush_tid = ++ci->i_cap_flush_last_tid; | |
1197 | if (pflush_tid) | |
1198 | *pflush_tid = flush_tid; | |
1199 | dout(" cap_flush_tid %d\n", (int)flush_tid); | |
1200 | for (i = 0; i < CEPH_CAP_BITS; i++) | |
1201 | if (flushing & (1 << i)) | |
1202 | ci->i_cap_flush_tid[i] = flush_tid; | |
7d8cb26d SW |
1203 | |
1204 | follows = ci->i_head_snapc->seq; | |
1205 | } else { | |
1206 | follows = 0; | |
a8599bd8 SW |
1207 | } |
1208 | ||
1209 | keep = cap->implemented; | |
1210 | seq = cap->seq; | |
1211 | issue_seq = cap->issue_seq; | |
1212 | mseq = cap->mseq; | |
1213 | size = inode->i_size; | |
1214 | ci->i_reported_size = size; | |
1215 | max_size = ci->i_wanted_max_size; | |
1216 | ci->i_requested_max_size = max_size; | |
1217 | mtime = inode->i_mtime; | |
1218 | atime = inode->i_atime; | |
1219 | time_warp_seq = ci->i_time_warp_seq; | |
a8599bd8 SW |
1220 | uid = inode->i_uid; |
1221 | gid = inode->i_gid; | |
1222 | mode = inode->i_mode; | |
1223 | ||
082afec9 | 1224 | if (flushing & CEPH_CAP_XATTR_EXCL) { |
a8599bd8 | 1225 | __ceph_build_xattrs_blob(ci); |
082afec9 SW |
1226 | xattr_blob = ci->i_xattrs.blob; |
1227 | xattr_version = ci->i_xattrs.version; | |
a8599bd8 SW |
1228 | } |
1229 | ||
be655596 | 1230 | spin_unlock(&ci->i_ceph_lock); |
a8599bd8 | 1231 | |
a8599bd8 SW |
1232 | ret = send_cap_msg(session, ceph_vino(inode).ino, cap_id, |
1233 | op, keep, want, flushing, seq, flush_tid, issue_seq, mseq, | |
1234 | size, max_size, &mtime, &atime, time_warp_seq, | |
082afec9 | 1235 | uid, gid, mode, xattr_version, xattr_blob, |
a8599bd8 SW |
1236 | follows); |
1237 | if (ret < 0) { | |
1238 | dout("error sending cap msg, must requeue %p\n", inode); | |
1239 | delayed = 1; | |
1240 | } | |
1241 | ||
1242 | if (wake) | |
03066f23 | 1243 | wake_up_all(&ci->i_cap_wq); |
a8599bd8 SW |
1244 | |
1245 | return delayed; | |
1246 | } | |
1247 | ||
1248 | /* | |
1249 | * When a snapshot is taken, clients accumulate dirty metadata on | |
1250 | * inodes with capabilities in ceph_cap_snaps to describe the file | |
1251 | * state at the time the snapshot was taken. This must be flushed | |
1252 | * asynchronously back to the MDS once sync writes complete and dirty | |
1253 | * data is written out. | |
1254 | * | |
e835124c SW |
1255 | * Unless @again is true, skip cap_snaps that were already sent to |
1256 | * the MDS (i.e., during this session). | |
1257 | * | |
be655596 | 1258 | * Called under i_ceph_lock. Takes s_mutex as needed. |
a8599bd8 SW |
1259 | */ |
1260 | void __ceph_flush_snaps(struct ceph_inode_info *ci, | |
e835124c SW |
1261 | struct ceph_mds_session **psession, |
1262 | int again) | |
be655596 SW |
1263 | __releases(ci->i_ceph_lock) |
1264 | __acquires(ci->i_ceph_lock) | |
a8599bd8 SW |
1265 | { |
1266 | struct inode *inode = &ci->vfs_inode; | |
1267 | int mds; | |
1268 | struct ceph_cap_snap *capsnap; | |
1269 | u32 mseq; | |
3d14c5d2 | 1270 | struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc; |
a8599bd8 SW |
1271 | struct ceph_mds_session *session = NULL; /* if session != NULL, we hold |
1272 | session->s_mutex */ | |
1273 | u64 next_follows = 0; /* keep track of how far we've gotten through the | |
1274 | i_cap_snaps list, and skip these entries next time | |
1275 | around to avoid an infinite loop */ | |
1276 | ||
1277 | if (psession) | |
1278 | session = *psession; | |
1279 | ||
1280 | dout("__flush_snaps %p\n", inode); | |
1281 | retry: | |
1282 | list_for_each_entry(capsnap, &ci->i_cap_snaps, ci_item) { | |
1283 | /* avoid an infiniute loop after retry */ | |
1284 | if (capsnap->follows < next_follows) | |
1285 | continue; | |
1286 | /* | |
1287 | * we need to wait for sync writes to complete and for dirty | |
1288 | * pages to be written out. | |
1289 | */ | |
1290 | if (capsnap->dirty_pages || capsnap->writing) | |
cfc0bf66 | 1291 | break; |
a8599bd8 | 1292 | |
819ccbfa SW |
1293 | /* |
1294 | * if cap writeback already occurred, we should have dropped | |
1295 | * the capsnap in ceph_put_wrbuffer_cap_refs. | |
1296 | */ | |
1297 | BUG_ON(capsnap->dirty == 0); | |
1298 | ||
a8599bd8 | 1299 | /* pick mds, take s_mutex */ |
ca81f3f6 SW |
1300 | if (ci->i_auth_cap == NULL) { |
1301 | dout("no auth cap (migrating?), doing nothing\n"); | |
1302 | goto out; | |
1303 | } | |
e835124c SW |
1304 | |
1305 | /* only flush each capsnap once */ | |
1306 | if (!again && !list_empty(&capsnap->flushing_item)) { | |
1307 | dout("already flushed %p, skipping\n", capsnap); | |
1308 | continue; | |
1309 | } | |
1310 | ||
ca81f3f6 SW |
1311 | mds = ci->i_auth_cap->session->s_mds; |
1312 | mseq = ci->i_auth_cap->mseq; | |
1313 | ||
a8599bd8 SW |
1314 | if (session && session->s_mds != mds) { |
1315 | dout("oops, wrong session %p mutex\n", session); | |
1316 | mutex_unlock(&session->s_mutex); | |
1317 | ceph_put_mds_session(session); | |
1318 | session = NULL; | |
1319 | } | |
1320 | if (!session) { | |
be655596 | 1321 | spin_unlock(&ci->i_ceph_lock); |
a8599bd8 SW |
1322 | mutex_lock(&mdsc->mutex); |
1323 | session = __ceph_lookup_mds_session(mdsc, mds); | |
1324 | mutex_unlock(&mdsc->mutex); | |
1325 | if (session) { | |
1326 | dout("inverting session/ino locks on %p\n", | |
1327 | session); | |
1328 | mutex_lock(&session->s_mutex); | |
1329 | } | |
1330 | /* | |
1331 | * if session == NULL, we raced against a cap | |
ca81f3f6 SW |
1332 | * deletion or migration. retry, and we'll |
1333 | * get a better @mds value next time. | |
a8599bd8 | 1334 | */ |
be655596 | 1335 | spin_lock(&ci->i_ceph_lock); |
a8599bd8 SW |
1336 | goto retry; |
1337 | } | |
1338 | ||
1339 | capsnap->flush_tid = ++ci->i_cap_flush_last_tid; | |
1340 | atomic_inc(&capsnap->nref); | |
1341 | if (!list_empty(&capsnap->flushing_item)) | |
1342 | list_del_init(&capsnap->flushing_item); | |
1343 | list_add_tail(&capsnap->flushing_item, | |
1344 | &session->s_cap_snaps_flushing); | |
be655596 | 1345 | spin_unlock(&ci->i_ceph_lock); |
a8599bd8 | 1346 | |
cfc0bf66 SW |
1347 | dout("flush_snaps %p cap_snap %p follows %lld tid %llu\n", |
1348 | inode, capsnap, capsnap->follows, capsnap->flush_tid); | |
a8599bd8 SW |
1349 | send_cap_msg(session, ceph_vino(inode).ino, 0, |
1350 | CEPH_CAP_OP_FLUSHSNAP, capsnap->issued, 0, | |
1351 | capsnap->dirty, 0, capsnap->flush_tid, 0, mseq, | |
1352 | capsnap->size, 0, | |
1353 | &capsnap->mtime, &capsnap->atime, | |
1354 | capsnap->time_warp_seq, | |
1355 | capsnap->uid, capsnap->gid, capsnap->mode, | |
4a625be4 | 1356 | capsnap->xattr_version, capsnap->xattr_blob, |
a8599bd8 SW |
1357 | capsnap->follows); |
1358 | ||
1359 | next_follows = capsnap->follows + 1; | |
1360 | ceph_put_cap_snap(capsnap); | |
1361 | ||
be655596 | 1362 | spin_lock(&ci->i_ceph_lock); |
a8599bd8 SW |
1363 | goto retry; |
1364 | } | |
1365 | ||
1366 | /* we flushed them all; remove this inode from the queue */ | |
1367 | spin_lock(&mdsc->snap_flush_lock); | |
1368 | list_del_init(&ci->i_snap_flush_item); | |
1369 | spin_unlock(&mdsc->snap_flush_lock); | |
1370 | ||
ca81f3f6 | 1371 | out: |
a8599bd8 SW |
1372 | if (psession) |
1373 | *psession = session; | |
1374 | else if (session) { | |
1375 | mutex_unlock(&session->s_mutex); | |
1376 | ceph_put_mds_session(session); | |
1377 | } | |
1378 | } | |
1379 | ||
1380 | static void ceph_flush_snaps(struct ceph_inode_info *ci) | |
1381 | { | |
be655596 | 1382 | spin_lock(&ci->i_ceph_lock); |
e835124c | 1383 | __ceph_flush_snaps(ci, NULL, 0); |
be655596 | 1384 | spin_unlock(&ci->i_ceph_lock); |
a8599bd8 SW |
1385 | } |
1386 | ||
76e3b390 | 1387 | /* |
fca65b4a SW |
1388 | * Mark caps dirty. If inode is newly dirty, return the dirty flags. |
1389 | * Caller is then responsible for calling __mark_inode_dirty with the | |
1390 | * returned flags value. | |
76e3b390 | 1391 | */ |
fca65b4a | 1392 | int __ceph_mark_dirty_caps(struct ceph_inode_info *ci, int mask) |
76e3b390 | 1393 | { |
640ef79d | 1394 | struct ceph_mds_client *mdsc = |
3d14c5d2 | 1395 | ceph_sb_to_client(ci->vfs_inode.i_sb)->mdsc; |
76e3b390 SW |
1396 | struct inode *inode = &ci->vfs_inode; |
1397 | int was = ci->i_dirty_caps; | |
1398 | int dirty = 0; | |
1399 | ||
1400 | dout("__mark_dirty_caps %p %s dirty %s -> %s\n", &ci->vfs_inode, | |
1401 | ceph_cap_string(mask), ceph_cap_string(was), | |
1402 | ceph_cap_string(was | mask)); | |
1403 | ci->i_dirty_caps |= mask; | |
1404 | if (was == 0) { | |
7d8cb26d SW |
1405 | if (!ci->i_head_snapc) |
1406 | ci->i_head_snapc = ceph_get_snap_context( | |
1407 | ci->i_snap_realm->cached_context); | |
0685235f YZ |
1408 | dout(" inode %p now dirty snapc %p auth cap %p\n", |
1409 | &ci->vfs_inode, ci->i_head_snapc, ci->i_auth_cap); | |
11df2dfb | 1410 | WARN_ON(!ci->i_auth_cap); |
76e3b390 SW |
1411 | BUG_ON(!list_empty(&ci->i_dirty_item)); |
1412 | spin_lock(&mdsc->cap_dirty_lock); | |
11df2dfb | 1413 | list_add(&ci->i_dirty_item, &mdsc->cap_dirty); |
76e3b390 SW |
1414 | spin_unlock(&mdsc->cap_dirty_lock); |
1415 | if (ci->i_flushing_caps == 0) { | |
3772d26d | 1416 | ihold(inode); |
76e3b390 SW |
1417 | dirty |= I_DIRTY_SYNC; |
1418 | } | |
1419 | } | |
1420 | BUG_ON(list_empty(&ci->i_dirty_item)); | |
1421 | if (((was | ci->i_flushing_caps) & CEPH_CAP_FILE_BUFFER) && | |
1422 | (mask & CEPH_CAP_FILE_BUFFER)) | |
1423 | dirty |= I_DIRTY_DATASYNC; | |
76e3b390 | 1424 | __cap_delay_requeue(mdsc, ci); |
fca65b4a | 1425 | return dirty; |
76e3b390 SW |
1426 | } |
1427 | ||
a8599bd8 SW |
1428 | /* |
1429 | * Add dirty inode to the flushing list. Assigned a seq number so we | |
1430 | * can wait for caps to flush without starving. | |
cdc35f96 | 1431 | * |
be655596 | 1432 | * Called under i_ceph_lock. |
a8599bd8 | 1433 | */ |
cdc35f96 | 1434 | static int __mark_caps_flushing(struct inode *inode, |
a8599bd8 SW |
1435 | struct ceph_mds_session *session) |
1436 | { | |
3d14c5d2 | 1437 | struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc; |
a8599bd8 | 1438 | struct ceph_inode_info *ci = ceph_inode(inode); |
cdc35f96 | 1439 | int flushing; |
50b885b9 | 1440 | |
cdc35f96 | 1441 | BUG_ON(ci->i_dirty_caps == 0); |
a8599bd8 | 1442 | BUG_ON(list_empty(&ci->i_dirty_item)); |
cdc35f96 SW |
1443 | |
1444 | flushing = ci->i_dirty_caps; | |
1445 | dout("__mark_caps_flushing flushing %s, flushing_caps %s -> %s\n", | |
1446 | ceph_cap_string(flushing), | |
1447 | ceph_cap_string(ci->i_flushing_caps), | |
1448 | ceph_cap_string(ci->i_flushing_caps | flushing)); | |
1449 | ci->i_flushing_caps |= flushing; | |
1450 | ci->i_dirty_caps = 0; | |
afcdaea3 | 1451 | dout(" inode %p now !dirty\n", inode); |
cdc35f96 | 1452 | |
a8599bd8 | 1453 | spin_lock(&mdsc->cap_dirty_lock); |
afcdaea3 SW |
1454 | list_del_init(&ci->i_dirty_item); |
1455 | ||
1456 | ci->i_cap_flush_seq = ++mdsc->cap_flush_seq; | |
a8599bd8 SW |
1457 | if (list_empty(&ci->i_flushing_item)) { |
1458 | list_add_tail(&ci->i_flushing_item, &session->s_cap_flushing); | |
1459 | mdsc->num_cap_flushing++; | |
afcdaea3 SW |
1460 | dout(" inode %p now flushing seq %lld\n", inode, |
1461 | ci->i_cap_flush_seq); | |
1462 | } else { | |
1463 | list_move_tail(&ci->i_flushing_item, &session->s_cap_flushing); | |
1464 | dout(" inode %p now flushing (more) seq %lld\n", inode, | |
a8599bd8 SW |
1465 | ci->i_cap_flush_seq); |
1466 | } | |
1467 | spin_unlock(&mdsc->cap_dirty_lock); | |
cdc35f96 SW |
1468 | |
1469 | return flushing; | |
a8599bd8 SW |
1470 | } |
1471 | ||
5ecad6fd SW |
1472 | /* |
1473 | * try to invalidate mapping pages without blocking. | |
1474 | */ | |
5ecad6fd SW |
1475 | static int try_nonblocking_invalidate(struct inode *inode) |
1476 | { | |
1477 | struct ceph_inode_info *ci = ceph_inode(inode); | |
1478 | u32 invalidating_gen = ci->i_rdcache_gen; | |
1479 | ||
be655596 | 1480 | spin_unlock(&ci->i_ceph_lock); |
5ecad6fd | 1481 | invalidate_mapping_pages(&inode->i_data, 0, -1); |
be655596 | 1482 | spin_lock(&ci->i_ceph_lock); |
5ecad6fd | 1483 | |
18a38193 | 1484 | if (inode->i_data.nrpages == 0 && |
5ecad6fd SW |
1485 | invalidating_gen == ci->i_rdcache_gen) { |
1486 | /* success. */ | |
1487 | dout("try_nonblocking_invalidate %p success\n", inode); | |
cd045cb4 SW |
1488 | /* save any racing async invalidate some trouble */ |
1489 | ci->i_rdcache_revoking = ci->i_rdcache_gen - 1; | |
5ecad6fd SW |
1490 | return 0; |
1491 | } | |
1492 | dout("try_nonblocking_invalidate %p failed\n", inode); | |
1493 | return -1; | |
1494 | } | |
1495 | ||
a8599bd8 SW |
1496 | /* |
1497 | * Swiss army knife function to examine currently used and wanted | |
1498 | * versus held caps. Release, flush, ack revoked caps to mds as | |
1499 | * appropriate. | |
1500 | * | |
1501 | * CHECK_CAPS_NODELAY - caller is delayed work and we should not delay | |
1502 | * cap release further. | |
1503 | * CHECK_CAPS_AUTHONLY - we should only check the auth cap | |
1504 | * CHECK_CAPS_FLUSH - we should flush any dirty caps immediately, without | |
1505 | * further delay. | |
1506 | */ | |
1507 | void ceph_check_caps(struct ceph_inode_info *ci, int flags, | |
1508 | struct ceph_mds_session *session) | |
1509 | { | |
3d14c5d2 YS |
1510 | struct ceph_fs_client *fsc = ceph_inode_to_client(&ci->vfs_inode); |
1511 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
a8599bd8 SW |
1512 | struct inode *inode = &ci->vfs_inode; |
1513 | struct ceph_cap *cap; | |
395c312b | 1514 | int file_wanted, used, cap_used; |
a8599bd8 | 1515 | int took_snap_rwsem = 0; /* true if mdsc->snap_rwsem held */ |
cbd03635 | 1516 | int issued, implemented, want, retain, revoking, flushing = 0; |
a8599bd8 SW |
1517 | int mds = -1; /* keep track of how far we've gone through i_caps list |
1518 | to avoid an infinite loop on retry */ | |
1519 | struct rb_node *p; | |
1520 | int tried_invalidate = 0; | |
1521 | int delayed = 0, sent = 0, force_requeue = 0, num; | |
cbd03635 | 1522 | int queue_invalidate = 0; |
a8599bd8 SW |
1523 | int is_delayed = flags & CHECK_CAPS_NODELAY; |
1524 | ||
1525 | /* if we are unmounting, flush any unused caps immediately. */ | |
1526 | if (mdsc->stopping) | |
1527 | is_delayed = 1; | |
1528 | ||
be655596 | 1529 | spin_lock(&ci->i_ceph_lock); |
a8599bd8 SW |
1530 | |
1531 | if (ci->i_ceph_flags & CEPH_I_FLUSH) | |
1532 | flags |= CHECK_CAPS_FLUSH; | |
1533 | ||
1534 | /* flush snaps first time around only */ | |
1535 | if (!list_empty(&ci->i_cap_snaps)) | |
e835124c | 1536 | __ceph_flush_snaps(ci, &session, 0); |
a8599bd8 SW |
1537 | goto retry_locked; |
1538 | retry: | |
be655596 | 1539 | spin_lock(&ci->i_ceph_lock); |
a8599bd8 SW |
1540 | retry_locked: |
1541 | file_wanted = __ceph_caps_file_wanted(ci); | |
1542 | used = __ceph_caps_used(ci); | |
1543 | want = file_wanted | used; | |
cbd03635 SW |
1544 | issued = __ceph_caps_issued(ci, &implemented); |
1545 | revoking = implemented & ~issued; | |
a8599bd8 SW |
1546 | |
1547 | retain = want | CEPH_CAP_PIN; | |
1548 | if (!mdsc->stopping && inode->i_nlink > 0) { | |
1549 | if (want) { | |
1550 | retain |= CEPH_CAP_ANY; /* be greedy */ | |
1551 | } else { | |
1552 | retain |= CEPH_CAP_ANY_SHARED; | |
1553 | /* | |
1554 | * keep RD only if we didn't have the file open RW, | |
1555 | * because then the mds would revoke it anyway to | |
1556 | * journal max_size=0. | |
1557 | */ | |
1558 | if (ci->i_max_size == 0) | |
1559 | retain |= CEPH_CAP_ANY_RD; | |
1560 | } | |
1561 | } | |
1562 | ||
1563 | dout("check_caps %p file_want %s used %s dirty %s flushing %s" | |
cbd03635 | 1564 | " issued %s revoking %s retain %s %s%s%s\n", inode, |
a8599bd8 SW |
1565 | ceph_cap_string(file_wanted), |
1566 | ceph_cap_string(used), ceph_cap_string(ci->i_dirty_caps), | |
1567 | ceph_cap_string(ci->i_flushing_caps), | |
cbd03635 | 1568 | ceph_cap_string(issued), ceph_cap_string(revoking), |
a8599bd8 SW |
1569 | ceph_cap_string(retain), |
1570 | (flags & CHECK_CAPS_AUTHONLY) ? " AUTHONLY" : "", | |
1571 | (flags & CHECK_CAPS_NODELAY) ? " NODELAY" : "", | |
1572 | (flags & CHECK_CAPS_FLUSH) ? " FLUSH" : ""); | |
1573 | ||
1574 | /* | |
1575 | * If we no longer need to hold onto old our caps, and we may | |
1576 | * have cached pages, but don't want them, then try to invalidate. | |
1577 | * If we fail, it's because pages are locked.... try again later. | |
1578 | */ | |
1579 | if ((!is_delayed || mdsc->stopping) && | |
1580 | ci->i_wrbuffer_ref == 0 && /* no dirty pages... */ | |
93afd449 | 1581 | inode->i_data.nrpages && /* have cached pages */ |
cbd03635 | 1582 | (file_wanted == 0 || /* no open files */ |
2962507c SW |
1583 | (revoking & (CEPH_CAP_FILE_CACHE| |
1584 | CEPH_CAP_FILE_LAZYIO))) && /* or revoking cache */ | |
a8599bd8 | 1585 | !tried_invalidate) { |
a8599bd8 | 1586 | dout("check_caps trying to invalidate on %p\n", inode); |
5ecad6fd | 1587 | if (try_nonblocking_invalidate(inode) < 0) { |
2962507c SW |
1588 | if (revoking & (CEPH_CAP_FILE_CACHE| |
1589 | CEPH_CAP_FILE_LAZYIO)) { | |
5ecad6fd SW |
1590 | dout("check_caps queuing invalidate\n"); |
1591 | queue_invalidate = 1; | |
1592 | ci->i_rdcache_revoking = ci->i_rdcache_gen; | |
1593 | } else { | |
1594 | dout("check_caps failed to invalidate pages\n"); | |
1595 | /* we failed to invalidate pages. check these | |
1596 | caps again later. */ | |
1597 | force_requeue = 1; | |
1598 | __cap_set_timeouts(mdsc, ci); | |
1599 | } | |
a8599bd8 SW |
1600 | } |
1601 | tried_invalidate = 1; | |
1602 | goto retry_locked; | |
1603 | } | |
1604 | ||
1605 | num = 0; | |
1606 | for (p = rb_first(&ci->i_caps); p; p = rb_next(p)) { | |
1607 | cap = rb_entry(p, struct ceph_cap, ci_node); | |
1608 | num++; | |
1609 | ||
1610 | /* avoid looping forever */ | |
1611 | if (mds >= cap->mds || | |
1612 | ((flags & CHECK_CAPS_AUTHONLY) && cap != ci->i_auth_cap)) | |
1613 | continue; | |
1614 | ||
1615 | /* NOTE: no side-effects allowed, until we take s_mutex */ | |
1616 | ||
395c312b YZ |
1617 | cap_used = used; |
1618 | if (ci->i_auth_cap && cap != ci->i_auth_cap) | |
1619 | cap_used &= ~ci->i_auth_cap->issued; | |
1620 | ||
a8599bd8 | 1621 | revoking = cap->implemented & ~cap->issued; |
395c312b | 1622 | dout(" mds%d cap %p used %s issued %s implemented %s revoking %s\n", |
088b3f5e | 1623 | cap->mds, cap, ceph_cap_string(cap->issued), |
395c312b | 1624 | ceph_cap_string(cap_used), |
088b3f5e SW |
1625 | ceph_cap_string(cap->implemented), |
1626 | ceph_cap_string(revoking)); | |
a8599bd8 SW |
1627 | |
1628 | if (cap == ci->i_auth_cap && | |
1629 | (cap->issued & CEPH_CAP_FILE_WR)) { | |
1630 | /* request larger max_size from MDS? */ | |
1631 | if (ci->i_wanted_max_size > ci->i_max_size && | |
1632 | ci->i_wanted_max_size > ci->i_requested_max_size) { | |
1633 | dout("requesting new max_size\n"); | |
1634 | goto ack; | |
1635 | } | |
1636 | ||
1637 | /* approaching file_max? */ | |
1638 | if ((inode->i_size << 1) >= ci->i_max_size && | |
1639 | (ci->i_reported_size << 1) < ci->i_max_size) { | |
1640 | dout("i_size approaching max_size\n"); | |
1641 | goto ack; | |
1642 | } | |
1643 | } | |
1644 | /* flush anything dirty? */ | |
1645 | if (cap == ci->i_auth_cap && (flags & CHECK_CAPS_FLUSH) && | |
1646 | ci->i_dirty_caps) { | |
1647 | dout("flushing dirty caps\n"); | |
1648 | goto ack; | |
1649 | } | |
1650 | ||
1651 | /* completed revocation? going down and there are no caps? */ | |
395c312b | 1652 | if (revoking && (revoking & cap_used) == 0) { |
a8599bd8 SW |
1653 | dout("completed revocation of %s\n", |
1654 | ceph_cap_string(cap->implemented & ~cap->issued)); | |
1655 | goto ack; | |
1656 | } | |
1657 | ||
1658 | /* want more caps from mds? */ | |
1659 | if (want & ~(cap->mds_wanted | cap->issued)) | |
1660 | goto ack; | |
1661 | ||
1662 | /* things we might delay */ | |
1663 | if ((cap->issued & ~retain) == 0 && | |
1664 | cap->mds_wanted == want) | |
1665 | continue; /* nope, all good */ | |
1666 | ||
1667 | if (is_delayed) | |
1668 | goto ack; | |
1669 | ||
1670 | /* delay? */ | |
1671 | if ((ci->i_ceph_flags & CEPH_I_NODELAY) == 0 && | |
1672 | time_before(jiffies, ci->i_hold_caps_max)) { | |
1673 | dout(" delaying issued %s -> %s, wanted %s -> %s\n", | |
1674 | ceph_cap_string(cap->issued), | |
1675 | ceph_cap_string(cap->issued & retain), | |
1676 | ceph_cap_string(cap->mds_wanted), | |
1677 | ceph_cap_string(want)); | |
1678 | delayed++; | |
1679 | continue; | |
1680 | } | |
1681 | ||
1682 | ack: | |
e9964c10 SW |
1683 | if (ci->i_ceph_flags & CEPH_I_NOFLUSH) { |
1684 | dout(" skipping %p I_NOFLUSH set\n", inode); | |
1685 | continue; | |
1686 | } | |
1687 | ||
a8599bd8 SW |
1688 | if (session && session != cap->session) { |
1689 | dout("oops, wrong session %p mutex\n", session); | |
1690 | mutex_unlock(&session->s_mutex); | |
1691 | session = NULL; | |
1692 | } | |
1693 | if (!session) { | |
1694 | session = cap->session; | |
1695 | if (mutex_trylock(&session->s_mutex) == 0) { | |
1696 | dout("inverting session/ino locks on %p\n", | |
1697 | session); | |
be655596 | 1698 | spin_unlock(&ci->i_ceph_lock); |
a8599bd8 SW |
1699 | if (took_snap_rwsem) { |
1700 | up_read(&mdsc->snap_rwsem); | |
1701 | took_snap_rwsem = 0; | |
1702 | } | |
1703 | mutex_lock(&session->s_mutex); | |
1704 | goto retry; | |
1705 | } | |
1706 | } | |
1707 | /* take snap_rwsem after session mutex */ | |
1708 | if (!took_snap_rwsem) { | |
1709 | if (down_read_trylock(&mdsc->snap_rwsem) == 0) { | |
1710 | dout("inverting snap/in locks on %p\n", | |
1711 | inode); | |
be655596 | 1712 | spin_unlock(&ci->i_ceph_lock); |
a8599bd8 SW |
1713 | down_read(&mdsc->snap_rwsem); |
1714 | took_snap_rwsem = 1; | |
1715 | goto retry; | |
1716 | } | |
1717 | took_snap_rwsem = 1; | |
1718 | } | |
1719 | ||
cdc35f96 SW |
1720 | if (cap == ci->i_auth_cap && ci->i_dirty_caps) |
1721 | flushing = __mark_caps_flushing(inode, session); | |
24be0c48 SW |
1722 | else |
1723 | flushing = 0; | |
a8599bd8 SW |
1724 | |
1725 | mds = cap->mds; /* remember mds, so we don't repeat */ | |
1726 | sent++; | |
1727 | ||
be655596 | 1728 | /* __send_cap drops i_ceph_lock */ |
395c312b YZ |
1729 | delayed += __send_cap(mdsc, cap, CEPH_CAP_OP_UPDATE, cap_used, |
1730 | want, retain, flushing, NULL); | |
be655596 | 1731 | goto retry; /* retake i_ceph_lock and restart our cap scan. */ |
a8599bd8 SW |
1732 | } |
1733 | ||
1734 | /* | |
1735 | * Reschedule delayed caps release if we delayed anything, | |
1736 | * otherwise cancel. | |
1737 | */ | |
1738 | if (delayed && is_delayed) | |
1739 | force_requeue = 1; /* __send_cap delayed release; requeue */ | |
1740 | if (!delayed && !is_delayed) | |
1741 | __cap_delay_cancel(mdsc, ci); | |
1742 | else if (!is_delayed || force_requeue) | |
1743 | __cap_delay_requeue(mdsc, ci); | |
1744 | ||
be655596 | 1745 | spin_unlock(&ci->i_ceph_lock); |
a8599bd8 | 1746 | |
cbd03635 | 1747 | if (queue_invalidate) |
3c6f6b79 | 1748 | ceph_queue_invalidate(inode); |
cbd03635 | 1749 | |
cdc2ce05 | 1750 | if (session) |
a8599bd8 SW |
1751 | mutex_unlock(&session->s_mutex); |
1752 | if (took_snap_rwsem) | |
1753 | up_read(&mdsc->snap_rwsem); | |
1754 | } | |
1755 | ||
a8599bd8 SW |
1756 | /* |
1757 | * Try to flush dirty caps back to the auth mds. | |
1758 | */ | |
4fe59789 | 1759 | static int try_flush_caps(struct inode *inode, unsigned *flush_tid) |
a8599bd8 | 1760 | { |
3d14c5d2 | 1761 | struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc; |
a8599bd8 | 1762 | struct ceph_inode_info *ci = ceph_inode(inode); |
a8599bd8 | 1763 | int flushing = 0; |
4fe59789 | 1764 | struct ceph_mds_session *session = NULL; |
a8599bd8 SW |
1765 | |
1766 | retry: | |
be655596 | 1767 | spin_lock(&ci->i_ceph_lock); |
e9964c10 SW |
1768 | if (ci->i_ceph_flags & CEPH_I_NOFLUSH) { |
1769 | dout("try_flush_caps skipping %p I_NOFLUSH set\n", inode); | |
1770 | goto out; | |
1771 | } | |
a8599bd8 SW |
1772 | if (ci->i_dirty_caps && ci->i_auth_cap) { |
1773 | struct ceph_cap *cap = ci->i_auth_cap; | |
1774 | int used = __ceph_caps_used(ci); | |
1775 | int want = __ceph_caps_wanted(ci); | |
1776 | int delayed; | |
1777 | ||
4fe59789 | 1778 | if (!session || session != cap->session) { |
be655596 | 1779 | spin_unlock(&ci->i_ceph_lock); |
4fe59789 YZ |
1780 | if (session) |
1781 | mutex_unlock(&session->s_mutex); | |
a8599bd8 SW |
1782 | session = cap->session; |
1783 | mutex_lock(&session->s_mutex); | |
1784 | goto retry; | |
1785 | } | |
a8599bd8 SW |
1786 | if (cap->session->s_state < CEPH_MDS_SESSION_OPEN) |
1787 | goto out; | |
1788 | ||
cdc35f96 | 1789 | flushing = __mark_caps_flushing(inode, session); |
a8599bd8 | 1790 | |
be655596 | 1791 | /* __send_cap drops i_ceph_lock */ |
a8599bd8 SW |
1792 | delayed = __send_cap(mdsc, cap, CEPH_CAP_OP_FLUSH, used, want, |
1793 | cap->issued | cap->implemented, flushing, | |
1794 | flush_tid); | |
1795 | if (!delayed) | |
1796 | goto out_unlocked; | |
1797 | ||
be655596 | 1798 | spin_lock(&ci->i_ceph_lock); |
a8599bd8 SW |
1799 | __cap_delay_requeue(mdsc, ci); |
1800 | } | |
1801 | out: | |
be655596 | 1802 | spin_unlock(&ci->i_ceph_lock); |
a8599bd8 | 1803 | out_unlocked: |
4fe59789 | 1804 | if (session) |
a8599bd8 SW |
1805 | mutex_unlock(&session->s_mutex); |
1806 | return flushing; | |
1807 | } | |
1808 | ||
1809 | /* | |
1810 | * Return true if we've flushed caps through the given flush_tid. | |
1811 | */ | |
1812 | static int caps_are_flushed(struct inode *inode, unsigned tid) | |
1813 | { | |
1814 | struct ceph_inode_info *ci = ceph_inode(inode); | |
a5ee751c | 1815 | int i, ret = 1; |
a8599bd8 | 1816 | |
be655596 | 1817 | spin_lock(&ci->i_ceph_lock); |
a8599bd8 SW |
1818 | for (i = 0; i < CEPH_CAP_BITS; i++) |
1819 | if ((ci->i_flushing_caps & (1 << i)) && | |
1820 | ci->i_cap_flush_tid[i] <= tid) { | |
1821 | /* still flushing this bit */ | |
1822 | ret = 0; | |
1823 | break; | |
1824 | } | |
be655596 | 1825 | spin_unlock(&ci->i_ceph_lock); |
a8599bd8 SW |
1826 | return ret; |
1827 | } | |
1828 | ||
1829 | /* | |
1830 | * Wait on any unsafe replies for the given inode. First wait on the | |
1831 | * newest request, and make that the upper bound. Then, if there are | |
1832 | * more requests, keep waiting on the oldest as long as it is still older | |
1833 | * than the original request. | |
1834 | */ | |
1835 | static void sync_write_wait(struct inode *inode) | |
1836 | { | |
1837 | struct ceph_inode_info *ci = ceph_inode(inode); | |
1838 | struct list_head *head = &ci->i_unsafe_writes; | |
1839 | struct ceph_osd_request *req; | |
1840 | u64 last_tid; | |
1841 | ||
1842 | spin_lock(&ci->i_unsafe_lock); | |
1843 | if (list_empty(head)) | |
1844 | goto out; | |
1845 | ||
1846 | /* set upper bound as _last_ entry in chain */ | |
1847 | req = list_entry(head->prev, struct ceph_osd_request, | |
1848 | r_unsafe_item); | |
1849 | last_tid = req->r_tid; | |
1850 | ||
1851 | do { | |
1852 | ceph_osdc_get_request(req); | |
1853 | spin_unlock(&ci->i_unsafe_lock); | |
1854 | dout("sync_write_wait on tid %llu (until %llu)\n", | |
1855 | req->r_tid, last_tid); | |
1856 | wait_for_completion(&req->r_safe_completion); | |
1857 | spin_lock(&ci->i_unsafe_lock); | |
1858 | ceph_osdc_put_request(req); | |
1859 | ||
1860 | /* | |
1861 | * from here on look at first entry in chain, since we | |
1862 | * only want to wait for anything older than last_tid | |
1863 | */ | |
1864 | if (list_empty(head)) | |
1865 | break; | |
1866 | req = list_entry(head->next, struct ceph_osd_request, | |
1867 | r_unsafe_item); | |
1868 | } while (req->r_tid < last_tid); | |
1869 | out: | |
1870 | spin_unlock(&ci->i_unsafe_lock); | |
1871 | } | |
1872 | ||
02c24a82 | 1873 | int ceph_fsync(struct file *file, loff_t start, loff_t end, int datasync) |
a8599bd8 | 1874 | { |
7ea80859 | 1875 | struct inode *inode = file->f_mapping->host; |
a8599bd8 SW |
1876 | struct ceph_inode_info *ci = ceph_inode(inode); |
1877 | unsigned flush_tid; | |
1878 | int ret; | |
1879 | int dirty; | |
1880 | ||
1881 | dout("fsync %p%s\n", inode, datasync ? " datasync" : ""); | |
1882 | sync_write_wait(inode); | |
1883 | ||
02c24a82 | 1884 | ret = filemap_write_and_wait_range(inode->i_mapping, start, end); |
a8599bd8 SW |
1885 | if (ret < 0) |
1886 | return ret; | |
02c24a82 | 1887 | mutex_lock(&inode->i_mutex); |
a8599bd8 | 1888 | |
4fe59789 | 1889 | dirty = try_flush_caps(inode, &flush_tid); |
a8599bd8 SW |
1890 | dout("fsync dirty caps are %s\n", ceph_cap_string(dirty)); |
1891 | ||
1892 | /* | |
1893 | * only wait on non-file metadata writeback (the mds | |
1894 | * can recover size and mtime, so we don't need to | |
1895 | * wait for that) | |
1896 | */ | |
1897 | if (!datasync && (dirty & ~CEPH_CAP_ANY_FILE_WR)) { | |
1898 | dout("fsync waiting for flush_tid %u\n", flush_tid); | |
1899 | ret = wait_event_interruptible(ci->i_cap_wq, | |
1900 | caps_are_flushed(inode, flush_tid)); | |
1901 | } | |
1902 | ||
1903 | dout("fsync %p%s done\n", inode, datasync ? " datasync" : ""); | |
02c24a82 | 1904 | mutex_unlock(&inode->i_mutex); |
a8599bd8 SW |
1905 | return ret; |
1906 | } | |
1907 | ||
1908 | /* | |
1909 | * Flush any dirty caps back to the mds. If we aren't asked to wait, | |
1910 | * queue inode for flush but don't do so immediately, because we can | |
1911 | * get by with fewer MDS messages if we wait for data writeback to | |
1912 | * complete first. | |
1913 | */ | |
f1a3d572 | 1914 | int ceph_write_inode(struct inode *inode, struct writeback_control *wbc) |
a8599bd8 SW |
1915 | { |
1916 | struct ceph_inode_info *ci = ceph_inode(inode); | |
1917 | unsigned flush_tid; | |
1918 | int err = 0; | |
1919 | int dirty; | |
f1a3d572 | 1920 | int wait = wbc->sync_mode == WB_SYNC_ALL; |
a8599bd8 SW |
1921 | |
1922 | dout("write_inode %p wait=%d\n", inode, wait); | |
1923 | if (wait) { | |
4fe59789 | 1924 | dirty = try_flush_caps(inode, &flush_tid); |
a8599bd8 SW |
1925 | if (dirty) |
1926 | err = wait_event_interruptible(ci->i_cap_wq, | |
1927 | caps_are_flushed(inode, flush_tid)); | |
1928 | } else { | |
640ef79d | 1929 | struct ceph_mds_client *mdsc = |
3d14c5d2 | 1930 | ceph_sb_to_client(inode->i_sb)->mdsc; |
a8599bd8 | 1931 | |
be655596 | 1932 | spin_lock(&ci->i_ceph_lock); |
a8599bd8 SW |
1933 | if (__ceph_caps_dirty(ci)) |
1934 | __cap_delay_requeue_front(mdsc, ci); | |
be655596 | 1935 | spin_unlock(&ci->i_ceph_lock); |
a8599bd8 SW |
1936 | } |
1937 | return err; | |
1938 | } | |
1939 | ||
1940 | /* | |
1941 | * After a recovering MDS goes active, we need to resend any caps | |
1942 | * we were flushing. | |
1943 | * | |
1944 | * Caller holds session->s_mutex. | |
1945 | */ | |
1946 | static void kick_flushing_capsnaps(struct ceph_mds_client *mdsc, | |
1947 | struct ceph_mds_session *session) | |
1948 | { | |
1949 | struct ceph_cap_snap *capsnap; | |
1950 | ||
1951 | dout("kick_flushing_capsnaps mds%d\n", session->s_mds); | |
1952 | list_for_each_entry(capsnap, &session->s_cap_snaps_flushing, | |
1953 | flushing_item) { | |
1954 | struct ceph_inode_info *ci = capsnap->ci; | |
1955 | struct inode *inode = &ci->vfs_inode; | |
1956 | struct ceph_cap *cap; | |
1957 | ||
be655596 | 1958 | spin_lock(&ci->i_ceph_lock); |
a8599bd8 SW |
1959 | cap = ci->i_auth_cap; |
1960 | if (cap && cap->session == session) { | |
1961 | dout("kick_flushing_caps %p cap %p capsnap %p\n", inode, | |
1962 | cap, capsnap); | |
e835124c | 1963 | __ceph_flush_snaps(ci, &session, 1); |
a8599bd8 SW |
1964 | } else { |
1965 | pr_err("%p auth cap %p not mds%d ???\n", inode, | |
1966 | cap, session->s_mds); | |
a8599bd8 | 1967 | } |
be655596 | 1968 | spin_unlock(&ci->i_ceph_lock); |
a8599bd8 SW |
1969 | } |
1970 | } | |
1971 | ||
1972 | void ceph_kick_flushing_caps(struct ceph_mds_client *mdsc, | |
1973 | struct ceph_mds_session *session) | |
1974 | { | |
1975 | struct ceph_inode_info *ci; | |
1976 | ||
1977 | kick_flushing_capsnaps(mdsc, session); | |
1978 | ||
1979 | dout("kick_flushing_caps mds%d\n", session->s_mds); | |
1980 | list_for_each_entry(ci, &session->s_cap_flushing, i_flushing_item) { | |
1981 | struct inode *inode = &ci->vfs_inode; | |
1982 | struct ceph_cap *cap; | |
1983 | int delayed = 0; | |
1984 | ||
be655596 | 1985 | spin_lock(&ci->i_ceph_lock); |
a8599bd8 SW |
1986 | cap = ci->i_auth_cap; |
1987 | if (cap && cap->session == session) { | |
1988 | dout("kick_flushing_caps %p cap %p %s\n", inode, | |
1989 | cap, ceph_cap_string(ci->i_flushing_caps)); | |
1990 | delayed = __send_cap(mdsc, cap, CEPH_CAP_OP_FLUSH, | |
1991 | __ceph_caps_used(ci), | |
1992 | __ceph_caps_wanted(ci), | |
1993 | cap->issued | cap->implemented, | |
1994 | ci->i_flushing_caps, NULL); | |
1995 | if (delayed) { | |
be655596 | 1996 | spin_lock(&ci->i_ceph_lock); |
a8599bd8 | 1997 | __cap_delay_requeue(mdsc, ci); |
be655596 | 1998 | spin_unlock(&ci->i_ceph_lock); |
a8599bd8 SW |
1999 | } |
2000 | } else { | |
2001 | pr_err("%p auth cap %p not mds%d ???\n", inode, | |
2002 | cap, session->s_mds); | |
be655596 | 2003 | spin_unlock(&ci->i_ceph_lock); |
a8599bd8 SW |
2004 | } |
2005 | } | |
2006 | } | |
2007 | ||
088b3f5e SW |
2008 | static void kick_flushing_inode_caps(struct ceph_mds_client *mdsc, |
2009 | struct ceph_mds_session *session, | |
2010 | struct inode *inode) | |
2011 | { | |
2012 | struct ceph_inode_info *ci = ceph_inode(inode); | |
2013 | struct ceph_cap *cap; | |
2014 | int delayed = 0; | |
2015 | ||
be655596 | 2016 | spin_lock(&ci->i_ceph_lock); |
088b3f5e SW |
2017 | cap = ci->i_auth_cap; |
2018 | dout("kick_flushing_inode_caps %p flushing %s flush_seq %lld\n", inode, | |
2019 | ceph_cap_string(ci->i_flushing_caps), ci->i_cap_flush_seq); | |
005c4697 | 2020 | |
088b3f5e | 2021 | __ceph_flush_snaps(ci, &session, 1); |
005c4697 | 2022 | |
088b3f5e | 2023 | if (ci->i_flushing_caps) { |
005c4697 YZ |
2024 | spin_lock(&mdsc->cap_dirty_lock); |
2025 | list_move_tail(&ci->i_flushing_item, | |
2026 | &cap->session->s_cap_flushing); | |
2027 | spin_unlock(&mdsc->cap_dirty_lock); | |
2028 | ||
088b3f5e SW |
2029 | delayed = __send_cap(mdsc, cap, CEPH_CAP_OP_FLUSH, |
2030 | __ceph_caps_used(ci), | |
2031 | __ceph_caps_wanted(ci), | |
2032 | cap->issued | cap->implemented, | |
2033 | ci->i_flushing_caps, NULL); | |
2034 | if (delayed) { | |
be655596 | 2035 | spin_lock(&ci->i_ceph_lock); |
088b3f5e | 2036 | __cap_delay_requeue(mdsc, ci); |
be655596 | 2037 | spin_unlock(&ci->i_ceph_lock); |
088b3f5e SW |
2038 | } |
2039 | } else { | |
be655596 | 2040 | spin_unlock(&ci->i_ceph_lock); |
088b3f5e SW |
2041 | } |
2042 | } | |
2043 | ||
a8599bd8 SW |
2044 | |
2045 | /* | |
2046 | * Take references to capabilities we hold, so that we don't release | |
2047 | * them to the MDS prematurely. | |
2048 | * | |
be655596 | 2049 | * Protected by i_ceph_lock. |
a8599bd8 SW |
2050 | */ |
2051 | static void __take_cap_refs(struct ceph_inode_info *ci, int got) | |
2052 | { | |
2053 | if (got & CEPH_CAP_PIN) | |
2054 | ci->i_pin_ref++; | |
2055 | if (got & CEPH_CAP_FILE_RD) | |
2056 | ci->i_rd_ref++; | |
2057 | if (got & CEPH_CAP_FILE_CACHE) | |
2058 | ci->i_rdcache_ref++; | |
2059 | if (got & CEPH_CAP_FILE_WR) | |
2060 | ci->i_wr_ref++; | |
2061 | if (got & CEPH_CAP_FILE_BUFFER) { | |
d3d0720d | 2062 | if (ci->i_wb_ref == 0) |
3772d26d | 2063 | ihold(&ci->vfs_inode); |
d3d0720d HC |
2064 | ci->i_wb_ref++; |
2065 | dout("__take_cap_refs %p wb %d -> %d (?)\n", | |
2066 | &ci->vfs_inode, ci->i_wb_ref-1, ci->i_wb_ref); | |
a8599bd8 SW |
2067 | } |
2068 | } | |
2069 | ||
2070 | /* | |
2071 | * Try to grab cap references. Specify those refs we @want, and the | |
2072 | * minimal set we @need. Also include the larger offset we are writing | |
2073 | * to (when applicable), and check against max_size here as well. | |
2074 | * Note that caller is responsible for ensuring max_size increases are | |
2075 | * requested from the MDS. | |
2076 | */ | |
2077 | static int try_get_cap_refs(struct ceph_inode_info *ci, int need, int want, | |
2078 | int *got, loff_t endoff, int *check_max, int *err) | |
2079 | { | |
2080 | struct inode *inode = &ci->vfs_inode; | |
2081 | int ret = 0; | |
2082 | int have, implemented; | |
195d3ce2 | 2083 | int file_wanted; |
a8599bd8 SW |
2084 | |
2085 | dout("get_cap_refs %p need %s want %s\n", inode, | |
2086 | ceph_cap_string(need), ceph_cap_string(want)); | |
be655596 | 2087 | spin_lock(&ci->i_ceph_lock); |
a8599bd8 | 2088 | |
195d3ce2 SW |
2089 | /* make sure file is actually open */ |
2090 | file_wanted = __ceph_caps_file_wanted(ci); | |
2091 | if ((file_wanted & need) == 0) { | |
2092 | dout("try_get_cap_refs need %s file_wanted %s, EBADF\n", | |
2093 | ceph_cap_string(need), ceph_cap_string(file_wanted)); | |
a8599bd8 SW |
2094 | *err = -EBADF; |
2095 | ret = 1; | |
2096 | goto out; | |
2097 | } | |
2098 | ||
37505d57 YZ |
2099 | /* finish pending truncate */ |
2100 | while (ci->i_truncate_pending) { | |
2101 | spin_unlock(&ci->i_ceph_lock); | |
b415bf4f | 2102 | __ceph_do_pending_vmtruncate(inode); |
37505d57 YZ |
2103 | spin_lock(&ci->i_ceph_lock); |
2104 | } | |
2105 | ||
3871cbb9 YZ |
2106 | have = __ceph_caps_issued(ci, &implemented); |
2107 | ||
2108 | if (have & need & CEPH_CAP_FILE_WR) { | |
a8599bd8 SW |
2109 | if (endoff >= 0 && endoff > (loff_t)ci->i_max_size) { |
2110 | dout("get_cap_refs %p endoff %llu > maxsize %llu\n", | |
2111 | inode, endoff, ci->i_max_size); | |
3871cbb9 | 2112 | if (endoff > ci->i_requested_max_size) { |
a8599bd8 SW |
2113 | *check_max = 1; |
2114 | ret = 1; | |
2115 | } | |
2116 | goto out; | |
2117 | } | |
2118 | /* | |
2119 | * If a sync write is in progress, we must wait, so that we | |
2120 | * can get a final snapshot value for size+mtime. | |
2121 | */ | |
2122 | if (__ceph_have_pending_cap_snap(ci)) { | |
2123 | dout("get_cap_refs %p cap_snap_pending\n", inode); | |
2124 | goto out; | |
2125 | } | |
2126 | } | |
a8599bd8 | 2127 | |
a8599bd8 SW |
2128 | if ((have & need) == need) { |
2129 | /* | |
2130 | * Look at (implemented & ~have & not) so that we keep waiting | |
2131 | * on transition from wanted -> needed caps. This is needed | |
2132 | * for WRBUFFER|WR -> WR to avoid a new WR sync write from | |
2133 | * going before a prior buffered writeback happens. | |
2134 | */ | |
2135 | int not = want & ~(have & need); | |
2136 | int revoking = implemented & ~have; | |
2137 | dout("get_cap_refs %p have %s but not %s (revoking %s)\n", | |
2138 | inode, ceph_cap_string(have), ceph_cap_string(not), | |
2139 | ceph_cap_string(revoking)); | |
2140 | if ((revoking & not) == 0) { | |
2141 | *got = need | (have & want); | |
2142 | __take_cap_refs(ci, *got); | |
2143 | ret = 1; | |
2144 | } | |
2145 | } else { | |
2146 | dout("get_cap_refs %p have %s needed %s\n", inode, | |
2147 | ceph_cap_string(have), ceph_cap_string(need)); | |
2148 | } | |
2149 | out: | |
be655596 | 2150 | spin_unlock(&ci->i_ceph_lock); |
a8599bd8 SW |
2151 | dout("get_cap_refs %p ret %d got %s\n", inode, |
2152 | ret, ceph_cap_string(*got)); | |
2153 | return ret; | |
2154 | } | |
2155 | ||
2156 | /* | |
2157 | * Check the offset we are writing up to against our current | |
2158 | * max_size. If necessary, tell the MDS we want to write to | |
2159 | * a larger offset. | |
2160 | */ | |
2161 | static void check_max_size(struct inode *inode, loff_t endoff) | |
2162 | { | |
2163 | struct ceph_inode_info *ci = ceph_inode(inode); | |
2164 | int check = 0; | |
2165 | ||
2166 | /* do we need to explicitly request a larger max_size? */ | |
be655596 | 2167 | spin_lock(&ci->i_ceph_lock); |
3871cbb9 | 2168 | if (endoff >= ci->i_max_size && endoff > ci->i_wanted_max_size) { |
a8599bd8 SW |
2169 | dout("write %p at large endoff %llu, req max_size\n", |
2170 | inode, endoff); | |
2171 | ci->i_wanted_max_size = endoff; | |
a8599bd8 | 2172 | } |
3871cbb9 YZ |
2173 | /* duplicate ceph_check_caps()'s logic */ |
2174 | if (ci->i_auth_cap && | |
2175 | (ci->i_auth_cap->issued & CEPH_CAP_FILE_WR) && | |
2176 | ci->i_wanted_max_size > ci->i_max_size && | |
2177 | ci->i_wanted_max_size > ci->i_requested_max_size) | |
2178 | check = 1; | |
be655596 | 2179 | spin_unlock(&ci->i_ceph_lock); |
a8599bd8 SW |
2180 | if (check) |
2181 | ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL); | |
2182 | } | |
2183 | ||
2184 | /* | |
2185 | * Wait for caps, and take cap references. If we can't get a WR cap | |
2186 | * due to a small max_size, make sure we check_max_size (and possibly | |
2187 | * ask the mds) so we don't get hung up indefinitely. | |
2188 | */ | |
2189 | int ceph_get_caps(struct ceph_inode_info *ci, int need, int want, int *got, | |
2190 | loff_t endoff) | |
2191 | { | |
2192 | int check_max, ret, err; | |
2193 | ||
2194 | retry: | |
2195 | if (endoff > 0) | |
2196 | check_max_size(&ci->vfs_inode, endoff); | |
2197 | check_max = 0; | |
2198 | err = 0; | |
2199 | ret = wait_event_interruptible(ci->i_cap_wq, | |
2200 | try_get_cap_refs(ci, need, want, | |
2201 | got, endoff, | |
2202 | &check_max, &err)); | |
2203 | if (err) | |
2204 | ret = err; | |
2205 | if (check_max) | |
2206 | goto retry; | |
2207 | return ret; | |
2208 | } | |
2209 | ||
2210 | /* | |
2211 | * Take cap refs. Caller must already know we hold at least one ref | |
2212 | * on the caps in question or we don't know this is safe. | |
2213 | */ | |
2214 | void ceph_get_cap_refs(struct ceph_inode_info *ci, int caps) | |
2215 | { | |
be655596 | 2216 | spin_lock(&ci->i_ceph_lock); |
a8599bd8 | 2217 | __take_cap_refs(ci, caps); |
be655596 | 2218 | spin_unlock(&ci->i_ceph_lock); |
a8599bd8 SW |
2219 | } |
2220 | ||
2221 | /* | |
2222 | * Release cap refs. | |
2223 | * | |
2224 | * If we released the last ref on any given cap, call ceph_check_caps | |
2225 | * to release (or schedule a release). | |
2226 | * | |
2227 | * If we are releasing a WR cap (from a sync write), finalize any affected | |
2228 | * cap_snap, and wake up any waiters. | |
2229 | */ | |
2230 | void ceph_put_cap_refs(struct ceph_inode_info *ci, int had) | |
2231 | { | |
2232 | struct inode *inode = &ci->vfs_inode; | |
2233 | int last = 0, put = 0, flushsnaps = 0, wake = 0; | |
2234 | struct ceph_cap_snap *capsnap; | |
2235 | ||
be655596 | 2236 | spin_lock(&ci->i_ceph_lock); |
a8599bd8 SW |
2237 | if (had & CEPH_CAP_PIN) |
2238 | --ci->i_pin_ref; | |
2239 | if (had & CEPH_CAP_FILE_RD) | |
2240 | if (--ci->i_rd_ref == 0) | |
2241 | last++; | |
2242 | if (had & CEPH_CAP_FILE_CACHE) | |
2243 | if (--ci->i_rdcache_ref == 0) | |
2244 | last++; | |
2245 | if (had & CEPH_CAP_FILE_BUFFER) { | |
d3d0720d | 2246 | if (--ci->i_wb_ref == 0) { |
a8599bd8 SW |
2247 | last++; |
2248 | put++; | |
2249 | } | |
d3d0720d HC |
2250 | dout("put_cap_refs %p wb %d -> %d (?)\n", |
2251 | inode, ci->i_wb_ref+1, ci->i_wb_ref); | |
a8599bd8 SW |
2252 | } |
2253 | if (had & CEPH_CAP_FILE_WR) | |
2254 | if (--ci->i_wr_ref == 0) { | |
2255 | last++; | |
2256 | if (!list_empty(&ci->i_cap_snaps)) { | |
2257 | capsnap = list_first_entry(&ci->i_cap_snaps, | |
2258 | struct ceph_cap_snap, | |
2259 | ci_item); | |
2260 | if (capsnap->writing) { | |
2261 | capsnap->writing = 0; | |
2262 | flushsnaps = | |
2263 | __ceph_finish_cap_snap(ci, | |
2264 | capsnap); | |
2265 | wake = 1; | |
2266 | } | |
2267 | } | |
2268 | } | |
be655596 | 2269 | spin_unlock(&ci->i_ceph_lock); |
a8599bd8 | 2270 | |
819ccbfa SW |
2271 | dout("put_cap_refs %p had %s%s%s\n", inode, ceph_cap_string(had), |
2272 | last ? " last" : "", put ? " put" : ""); | |
a8599bd8 SW |
2273 | |
2274 | if (last && !flushsnaps) | |
2275 | ceph_check_caps(ci, 0, NULL); | |
2276 | else if (flushsnaps) | |
2277 | ceph_flush_snaps(ci); | |
2278 | if (wake) | |
03066f23 | 2279 | wake_up_all(&ci->i_cap_wq); |
a8599bd8 SW |
2280 | if (put) |
2281 | iput(inode); | |
2282 | } | |
2283 | ||
2284 | /* | |
2285 | * Release @nr WRBUFFER refs on dirty pages for the given @snapc snap | |
2286 | * context. Adjust per-snap dirty page accounting as appropriate. | |
2287 | * Once all dirty data for a cap_snap is flushed, flush snapped file | |
2288 | * metadata back to the MDS. If we dropped the last ref, call | |
2289 | * ceph_check_caps. | |
2290 | */ | |
2291 | void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info *ci, int nr, | |
2292 | struct ceph_snap_context *snapc) | |
2293 | { | |
2294 | struct inode *inode = &ci->vfs_inode; | |
2295 | int last = 0; | |
819ccbfa SW |
2296 | int complete_capsnap = 0; |
2297 | int drop_capsnap = 0; | |
a8599bd8 SW |
2298 | int found = 0; |
2299 | struct ceph_cap_snap *capsnap = NULL; | |
2300 | ||
be655596 | 2301 | spin_lock(&ci->i_ceph_lock); |
a8599bd8 SW |
2302 | ci->i_wrbuffer_ref -= nr; |
2303 | last = !ci->i_wrbuffer_ref; | |
2304 | ||
2305 | if (ci->i_head_snapc == snapc) { | |
2306 | ci->i_wrbuffer_ref_head -= nr; | |
7d8cb26d SW |
2307 | if (ci->i_wrbuffer_ref_head == 0 && |
2308 | ci->i_dirty_caps == 0 && ci->i_flushing_caps == 0) { | |
2309 | BUG_ON(!ci->i_head_snapc); | |
a8599bd8 SW |
2310 | ceph_put_snap_context(ci->i_head_snapc); |
2311 | ci->i_head_snapc = NULL; | |
2312 | } | |
2313 | dout("put_wrbuffer_cap_refs on %p head %d/%d -> %d/%d %s\n", | |
2314 | inode, | |
2315 | ci->i_wrbuffer_ref+nr, ci->i_wrbuffer_ref_head+nr, | |
2316 | ci->i_wrbuffer_ref, ci->i_wrbuffer_ref_head, | |
2317 | last ? " LAST" : ""); | |
2318 | } else { | |
2319 | list_for_each_entry(capsnap, &ci->i_cap_snaps, ci_item) { | |
2320 | if (capsnap->context == snapc) { | |
2321 | found = 1; | |
a8599bd8 SW |
2322 | break; |
2323 | } | |
2324 | } | |
2325 | BUG_ON(!found); | |
819ccbfa SW |
2326 | capsnap->dirty_pages -= nr; |
2327 | if (capsnap->dirty_pages == 0) { | |
2328 | complete_capsnap = 1; | |
2329 | if (capsnap->dirty == 0) | |
2330 | /* cap writeback completed before we created | |
2331 | * the cap_snap; no FLUSHSNAP is needed */ | |
2332 | drop_capsnap = 1; | |
2333 | } | |
a8599bd8 | 2334 | dout("put_wrbuffer_cap_refs on %p cap_snap %p " |
819ccbfa | 2335 | " snap %lld %d/%d -> %d/%d %s%s%s\n", |
a8599bd8 SW |
2336 | inode, capsnap, capsnap->context->seq, |
2337 | ci->i_wrbuffer_ref+nr, capsnap->dirty_pages + nr, | |
2338 | ci->i_wrbuffer_ref, capsnap->dirty_pages, | |
2339 | last ? " (wrbuffer last)" : "", | |
819ccbfa SW |
2340 | complete_capsnap ? " (complete capsnap)" : "", |
2341 | drop_capsnap ? " (drop capsnap)" : ""); | |
2342 | if (drop_capsnap) { | |
2343 | ceph_put_snap_context(capsnap->context); | |
2344 | list_del(&capsnap->ci_item); | |
2345 | list_del(&capsnap->flushing_item); | |
2346 | ceph_put_cap_snap(capsnap); | |
2347 | } | |
a8599bd8 SW |
2348 | } |
2349 | ||
be655596 | 2350 | spin_unlock(&ci->i_ceph_lock); |
a8599bd8 SW |
2351 | |
2352 | if (last) { | |
2353 | ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL); | |
2354 | iput(inode); | |
819ccbfa | 2355 | } else if (complete_capsnap) { |
a8599bd8 | 2356 | ceph_flush_snaps(ci); |
03066f23 | 2357 | wake_up_all(&ci->i_cap_wq); |
a8599bd8 | 2358 | } |
819ccbfa SW |
2359 | if (drop_capsnap) |
2360 | iput(inode); | |
a8599bd8 SW |
2361 | } |
2362 | ||
ca20c991 YZ |
2363 | /* |
2364 | * Invalidate unlinked inode's aliases, so we can drop the inode ASAP. | |
2365 | */ | |
2366 | static void invalidate_aliases(struct inode *inode) | |
2367 | { | |
2368 | struct dentry *dn, *prev = NULL; | |
2369 | ||
2370 | dout("invalidate_aliases inode %p\n", inode); | |
2371 | d_prune_aliases(inode); | |
2372 | /* | |
2373 | * For non-directory inode, d_find_alias() only returns | |
fc12c80a BF |
2374 | * hashed dentry. After calling d_invalidate(), the |
2375 | * dentry becomes unhashed. | |
ca20c991 | 2376 | * |
a8d436f0 | 2377 | * For directory inode, d_find_alias() can return |
fc12c80a | 2378 | * unhashed dentry. But directory inode should have |
ca20c991 YZ |
2379 | * one alias at most. |
2380 | */ | |
2381 | while ((dn = d_find_alias(inode))) { | |
2382 | if (dn == prev) { | |
2383 | dput(dn); | |
2384 | break; | |
2385 | } | |
a8d436f0 | 2386 | d_invalidate(dn); |
ca20c991 YZ |
2387 | if (prev) |
2388 | dput(prev); | |
2389 | prev = dn; | |
2390 | } | |
2391 | if (prev) | |
2392 | dput(prev); | |
2393 | } | |
2394 | ||
a8599bd8 SW |
2395 | /* |
2396 | * Handle a cap GRANT message from the MDS. (Note that a GRANT may | |
2397 | * actually be a revocation if it specifies a smaller cap set.) | |
2398 | * | |
be655596 | 2399 | * caller holds s_mutex and i_ceph_lock, we drop both. |
15637c8b | 2400 | * |
a8599bd8 SW |
2401 | * return value: |
2402 | * 0 - ok | |
2403 | * 1 - check_caps on auth cap only (writeback) | |
2404 | * 2 - check_caps (ack revoke) | |
2405 | */ | |
15637c8b SW |
2406 | static void handle_cap_grant(struct inode *inode, struct ceph_mds_caps *grant, |
2407 | struct ceph_mds_session *session, | |
2408 | struct ceph_cap *cap, | |
2409 | struct ceph_buffer *xattr_buf) | |
be655596 | 2410 | __releases(ci->i_ceph_lock) |
a8599bd8 SW |
2411 | { |
2412 | struct ceph_inode_info *ci = ceph_inode(inode); | |
2413 | int mds = session->s_mds; | |
2f56f56a | 2414 | int seq = le32_to_cpu(grant->seq); |
a8599bd8 SW |
2415 | int newcaps = le32_to_cpu(grant->caps); |
2416 | int issued, implemented, used, wanted, dirty; | |
2417 | u64 size = le64_to_cpu(grant->size); | |
2418 | u64 max_size = le64_to_cpu(grant->max_size); | |
2419 | struct timespec mtime, atime, ctime; | |
15637c8b | 2420 | int check_caps = 0; |
a8599bd8 SW |
2421 | int wake = 0; |
2422 | int writeback = 0; | |
3c6f6b79 | 2423 | int queue_invalidate = 0; |
ca20c991 | 2424 | int deleted_inode = 0; |
99ccbd22 | 2425 | int queue_revalidate = 0; |
a8599bd8 | 2426 | |
2f56f56a SW |
2427 | dout("handle_cap_grant inode %p cap %p mds%d seq %d %s\n", |
2428 | inode, cap, mds, seq, ceph_cap_string(newcaps)); | |
a8599bd8 SW |
2429 | dout(" size %llu max_size %llu, i_size %llu\n", size, max_size, |
2430 | inode->i_size); | |
2431 | ||
11df2dfb YZ |
2432 | |
2433 | /* | |
2434 | * auth mds of the inode changed. we received the cap export message, | |
2435 | * but still haven't received the cap import message. handle_cap_export | |
2436 | * updated the new auth MDS' cap. | |
2437 | * | |
2438 | * "ceph_seq_cmp(seq, cap->seq) <= 0" means we are processing a message | |
2439 | * that was sent before the cap import message. So don't remove caps. | |
2440 | */ | |
2441 | if (ceph_seq_cmp(seq, cap->seq) <= 0) { | |
2442 | WARN_ON(cap != ci->i_auth_cap); | |
2443 | WARN_ON(cap->cap_id != le64_to_cpu(grant->cap_id)); | |
2444 | seq = cap->seq; | |
2445 | newcaps |= cap->issued; | |
2446 | } | |
2447 | ||
a8599bd8 SW |
2448 | /* |
2449 | * If CACHE is being revoked, and we have no dirty buffers, | |
2450 | * try to invalidate (once). (If there are dirty buffers, we | |
2451 | * will invalidate _after_ writeback.) | |
2452 | */ | |
3b454c49 SW |
2453 | if (((cap->issued & ~newcaps) & CEPH_CAP_FILE_CACHE) && |
2454 | (newcaps & CEPH_CAP_FILE_LAZYIO) == 0 && | |
bcd2cbd1 | 2455 | !ci->i_wrbuffer_ref) { |
e9075743 | 2456 | if (try_nonblocking_invalidate(inode)) { |
a8599bd8 SW |
2457 | /* there were locked pages.. invalidate later |
2458 | in a separate thread. */ | |
2459 | if (ci->i_rdcache_revoking != ci->i_rdcache_gen) { | |
3c6f6b79 | 2460 | queue_invalidate = 1; |
a8599bd8 SW |
2461 | ci->i_rdcache_revoking = ci->i_rdcache_gen; |
2462 | } | |
a8599bd8 | 2463 | } |
99ccbd22 MT |
2464 | |
2465 | ceph_fscache_invalidate(inode); | |
a8599bd8 SW |
2466 | } |
2467 | ||
2468 | /* side effects now are allowed */ | |
2469 | ||
2470 | issued = __ceph_caps_issued(ci, &implemented); | |
2471 | issued |= implemented | __ceph_caps_dirty(ci); | |
2472 | ||
685f9a5d | 2473 | cap->cap_gen = session->s_cap_gen; |
11df2dfb | 2474 | cap->seq = seq; |
a8599bd8 SW |
2475 | |
2476 | __check_cap_issue(ci, cap, newcaps); | |
2477 | ||
2478 | if ((issued & CEPH_CAP_AUTH_EXCL) == 0) { | |
2479 | inode->i_mode = le32_to_cpu(grant->mode); | |
05cb11c1 EB |
2480 | inode->i_uid = make_kuid(&init_user_ns, le32_to_cpu(grant->uid)); |
2481 | inode->i_gid = make_kgid(&init_user_ns, le32_to_cpu(grant->gid)); | |
a8599bd8 | 2482 | dout("%p mode 0%o uid.gid %d.%d\n", inode, inode->i_mode, |
bd2bae6a EB |
2483 | from_kuid(&init_user_ns, inode->i_uid), |
2484 | from_kgid(&init_user_ns, inode->i_gid)); | |
a8599bd8 SW |
2485 | } |
2486 | ||
ca20c991 | 2487 | if ((issued & CEPH_CAP_LINK_EXCL) == 0) { |
bfe86848 | 2488 | set_nlink(inode, le32_to_cpu(grant->nlink)); |
ca20c991 YZ |
2489 | if (inode->i_nlink == 0 && |
2490 | (newcaps & (CEPH_CAP_LINK_SHARED | CEPH_CAP_LINK_EXCL))) | |
2491 | deleted_inode = 1; | |
2492 | } | |
a8599bd8 SW |
2493 | |
2494 | if ((issued & CEPH_CAP_XATTR_EXCL) == 0 && grant->xattr_len) { | |
2495 | int len = le32_to_cpu(grant->xattr_len); | |
2496 | u64 version = le64_to_cpu(grant->xattr_version); | |
2497 | ||
2498 | if (version > ci->i_xattrs.version) { | |
2499 | dout(" got new xattrs v%llu on %p len %d\n", | |
2500 | version, inode, len); | |
2501 | if (ci->i_xattrs.blob) | |
2502 | ceph_buffer_put(ci->i_xattrs.blob); | |
2503 | ci->i_xattrs.blob = ceph_buffer_get(xattr_buf); | |
2504 | ci->i_xattrs.version = version; | |
7221fe4c | 2505 | ceph_forget_all_cached_acls(inode); |
a8599bd8 SW |
2506 | } |
2507 | } | |
2508 | ||
99ccbd22 MT |
2509 | /* Do we need to revalidate our fscache cookie. Don't bother on the |
2510 | * first cache cap as we already validate at cookie creation time. */ | |
2511 | if ((issued & CEPH_CAP_FILE_CACHE) && ci->i_rdcache_gen > 1) | |
2512 | queue_revalidate = 1; | |
2513 | ||
a8599bd8 SW |
2514 | /* size/ctime/mtime/atime? */ |
2515 | ceph_fill_file_size(inode, issued, | |
2516 | le32_to_cpu(grant->truncate_seq), | |
2517 | le64_to_cpu(grant->truncate_size), size); | |
2518 | ceph_decode_timespec(&mtime, &grant->mtime); | |
2519 | ceph_decode_timespec(&atime, &grant->atime); | |
2520 | ceph_decode_timespec(&ctime, &grant->ctime); | |
2521 | ceph_fill_file_time(inode, issued, | |
2522 | le32_to_cpu(grant->time_warp_seq), &ctime, &mtime, | |
2523 | &atime); | |
2524 | ||
11df2dfb YZ |
2525 | |
2526 | /* file layout may have changed */ | |
2527 | ci->i_layout = grant->layout; | |
2528 | ||
a8599bd8 | 2529 | /* max size increase? */ |
5e62ad30 | 2530 | if (ci->i_auth_cap == cap && max_size != ci->i_max_size) { |
a8599bd8 SW |
2531 | dout("max_size %lld -> %llu\n", ci->i_max_size, max_size); |
2532 | ci->i_max_size = max_size; | |
2533 | if (max_size >= ci->i_wanted_max_size) { | |
2534 | ci->i_wanted_max_size = 0; /* reset */ | |
2535 | ci->i_requested_max_size = 0; | |
2536 | } | |
2537 | wake = 1; | |
2538 | } | |
2539 | ||
2540 | /* check cap bits */ | |
2541 | wanted = __ceph_caps_wanted(ci); | |
2542 | used = __ceph_caps_used(ci); | |
2543 | dirty = __ceph_caps_dirty(ci); | |
2544 | dout(" my wanted = %s, used = %s, dirty %s\n", | |
2545 | ceph_cap_string(wanted), | |
2546 | ceph_cap_string(used), | |
2547 | ceph_cap_string(dirty)); | |
2548 | if (wanted != le32_to_cpu(grant->wanted)) { | |
2549 | dout("mds wanted %s -> %s\n", | |
2550 | ceph_cap_string(le32_to_cpu(grant->wanted)), | |
2551 | ceph_cap_string(wanted)); | |
390306c3 YZ |
2552 | /* imported cap may not have correct mds_wanted */ |
2553 | if (le32_to_cpu(grant->op) == CEPH_CAP_OP_IMPORT) | |
2554 | check_caps = 1; | |
a8599bd8 SW |
2555 | } |
2556 | ||
a8599bd8 SW |
2557 | /* revocation, grant, or no-op? */ |
2558 | if (cap->issued & ~newcaps) { | |
3b454c49 SW |
2559 | int revoking = cap->issued & ~newcaps; |
2560 | ||
2561 | dout("revocation: %s -> %s (revoking %s)\n", | |
2562 | ceph_cap_string(cap->issued), | |
2563 | ceph_cap_string(newcaps), | |
2564 | ceph_cap_string(revoking)); | |
0eb6cd49 | 2565 | if (revoking & used & CEPH_CAP_FILE_BUFFER) |
3b454c49 SW |
2566 | writeback = 1; /* initiate writeback; will delay ack */ |
2567 | else if (revoking == CEPH_CAP_FILE_CACHE && | |
2568 | (newcaps & CEPH_CAP_FILE_LAZYIO) == 0 && | |
2569 | queue_invalidate) | |
2570 | ; /* do nothing yet, invalidation will be queued */ | |
2571 | else if (cap == ci->i_auth_cap) | |
2572 | check_caps = 1; /* check auth cap only */ | |
2573 | else | |
2574 | check_caps = 2; /* check all caps */ | |
a8599bd8 | 2575 | cap->issued = newcaps; |
978097c9 | 2576 | cap->implemented |= newcaps; |
a8599bd8 SW |
2577 | } else if (cap->issued == newcaps) { |
2578 | dout("caps unchanged: %s -> %s\n", | |
2579 | ceph_cap_string(cap->issued), ceph_cap_string(newcaps)); | |
2580 | } else { | |
2581 | dout("grant: %s -> %s\n", ceph_cap_string(cap->issued), | |
2582 | ceph_cap_string(newcaps)); | |
6ee6b953 YZ |
2583 | /* non-auth MDS is revoking the newly grant caps ? */ |
2584 | if (cap == ci->i_auth_cap && | |
2585 | __ceph_caps_revoking_other(ci, cap, newcaps)) | |
2586 | check_caps = 2; | |
2587 | ||
a8599bd8 SW |
2588 | cap->issued = newcaps; |
2589 | cap->implemented |= newcaps; /* add bits only, to | |
2590 | * avoid stepping on a | |
2591 | * pending revocation */ | |
2592 | wake = 1; | |
2593 | } | |
978097c9 | 2594 | BUG_ON(cap->issued & ~cap->implemented); |
a8599bd8 | 2595 | |
be655596 | 2596 | spin_unlock(&ci->i_ceph_lock); |
99ccbd22 | 2597 | |
3c6f6b79 | 2598 | if (writeback) |
a8599bd8 SW |
2599 | /* |
2600 | * queue inode for writeback: we can't actually call | |
2601 | * filemap_write_and_wait, etc. from message handler | |
2602 | * context. | |
2603 | */ | |
3c6f6b79 SW |
2604 | ceph_queue_writeback(inode); |
2605 | if (queue_invalidate) | |
2606 | ceph_queue_invalidate(inode); | |
ca20c991 YZ |
2607 | if (deleted_inode) |
2608 | invalidate_aliases(inode); | |
99ccbd22 MT |
2609 | if (queue_revalidate) |
2610 | ceph_queue_revalidate(inode); | |
a8599bd8 | 2611 | if (wake) |
03066f23 | 2612 | wake_up_all(&ci->i_cap_wq); |
15637c8b SW |
2613 | |
2614 | if (check_caps == 1) | |
2615 | ceph_check_caps(ci, CHECK_CAPS_NODELAY|CHECK_CAPS_AUTHONLY, | |
2616 | session); | |
2617 | else if (check_caps == 2) | |
2618 | ceph_check_caps(ci, CHECK_CAPS_NODELAY, session); | |
2619 | else | |
2620 | mutex_unlock(&session->s_mutex); | |
a8599bd8 SW |
2621 | } |
2622 | ||
2623 | /* | |
2624 | * Handle FLUSH_ACK from MDS, indicating that metadata we sent to the | |
2625 | * MDS has been safely committed. | |
2626 | */ | |
6df058c0 | 2627 | static void handle_cap_flush_ack(struct inode *inode, u64 flush_tid, |
a8599bd8 SW |
2628 | struct ceph_mds_caps *m, |
2629 | struct ceph_mds_session *session, | |
2630 | struct ceph_cap *cap) | |
be655596 | 2631 | __releases(ci->i_ceph_lock) |
a8599bd8 SW |
2632 | { |
2633 | struct ceph_inode_info *ci = ceph_inode(inode); | |
3d14c5d2 | 2634 | struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc; |
a8599bd8 SW |
2635 | unsigned seq = le32_to_cpu(m->seq); |
2636 | int dirty = le32_to_cpu(m->dirty); | |
2637 | int cleaned = 0; | |
afcdaea3 | 2638 | int drop = 0; |
a8599bd8 SW |
2639 | int i; |
2640 | ||
2641 | for (i = 0; i < CEPH_CAP_BITS; i++) | |
2642 | if ((dirty & (1 << i)) && | |
2643 | flush_tid == ci->i_cap_flush_tid[i]) | |
2644 | cleaned |= 1 << i; | |
2645 | ||
2646 | dout("handle_cap_flush_ack inode %p mds%d seq %d on %s cleaned %s," | |
2647 | " flushing %s -> %s\n", | |
2648 | inode, session->s_mds, seq, ceph_cap_string(dirty), | |
2649 | ceph_cap_string(cleaned), ceph_cap_string(ci->i_flushing_caps), | |
2650 | ceph_cap_string(ci->i_flushing_caps & ~cleaned)); | |
2651 | ||
2652 | if (ci->i_flushing_caps == (ci->i_flushing_caps & ~cleaned)) | |
2653 | goto out; | |
2654 | ||
a8599bd8 | 2655 | ci->i_flushing_caps &= ~cleaned; |
a8599bd8 SW |
2656 | |
2657 | spin_lock(&mdsc->cap_dirty_lock); | |
2658 | if (ci->i_flushing_caps == 0) { | |
2659 | list_del_init(&ci->i_flushing_item); | |
2660 | if (!list_empty(&session->s_cap_flushing)) | |
2661 | dout(" mds%d still flushing cap on %p\n", | |
2662 | session->s_mds, | |
2663 | &list_entry(session->s_cap_flushing.next, | |
2664 | struct ceph_inode_info, | |
2665 | i_flushing_item)->vfs_inode); | |
2666 | mdsc->num_cap_flushing--; | |
03066f23 | 2667 | wake_up_all(&mdsc->cap_flushing_wq); |
a8599bd8 | 2668 | dout(" inode %p now !flushing\n", inode); |
afcdaea3 SW |
2669 | |
2670 | if (ci->i_dirty_caps == 0) { | |
2671 | dout(" inode %p now clean\n", inode); | |
2672 | BUG_ON(!list_empty(&ci->i_dirty_item)); | |
2673 | drop = 1; | |
7d8cb26d SW |
2674 | if (ci->i_wrbuffer_ref_head == 0) { |
2675 | BUG_ON(!ci->i_head_snapc); | |
2676 | ceph_put_snap_context(ci->i_head_snapc); | |
2677 | ci->i_head_snapc = NULL; | |
2678 | } | |
76e3b390 SW |
2679 | } else { |
2680 | BUG_ON(list_empty(&ci->i_dirty_item)); | |
afcdaea3 | 2681 | } |
a8599bd8 SW |
2682 | } |
2683 | spin_unlock(&mdsc->cap_dirty_lock); | |
03066f23 | 2684 | wake_up_all(&ci->i_cap_wq); |
a8599bd8 SW |
2685 | |
2686 | out: | |
be655596 | 2687 | spin_unlock(&ci->i_ceph_lock); |
afcdaea3 | 2688 | if (drop) |
a8599bd8 SW |
2689 | iput(inode); |
2690 | } | |
2691 | ||
2692 | /* | |
2693 | * Handle FLUSHSNAP_ACK. MDS has flushed snap data to disk and we can | |
2694 | * throw away our cap_snap. | |
2695 | * | |
2696 | * Caller hold s_mutex. | |
2697 | */ | |
6df058c0 | 2698 | static void handle_cap_flushsnap_ack(struct inode *inode, u64 flush_tid, |
a8599bd8 SW |
2699 | struct ceph_mds_caps *m, |
2700 | struct ceph_mds_session *session) | |
2701 | { | |
2702 | struct ceph_inode_info *ci = ceph_inode(inode); | |
2703 | u64 follows = le64_to_cpu(m->snap_follows); | |
a8599bd8 SW |
2704 | struct ceph_cap_snap *capsnap; |
2705 | int drop = 0; | |
2706 | ||
2707 | dout("handle_cap_flushsnap_ack inode %p ci %p mds%d follows %lld\n", | |
2708 | inode, ci, session->s_mds, follows); | |
2709 | ||
be655596 | 2710 | spin_lock(&ci->i_ceph_lock); |
a8599bd8 SW |
2711 | list_for_each_entry(capsnap, &ci->i_cap_snaps, ci_item) { |
2712 | if (capsnap->follows == follows) { | |
2713 | if (capsnap->flush_tid != flush_tid) { | |
2714 | dout(" cap_snap %p follows %lld tid %lld !=" | |
2715 | " %lld\n", capsnap, follows, | |
2716 | flush_tid, capsnap->flush_tid); | |
2717 | break; | |
2718 | } | |
2719 | WARN_ON(capsnap->dirty_pages || capsnap->writing); | |
819ccbfa SW |
2720 | dout(" removing %p cap_snap %p follows %lld\n", |
2721 | inode, capsnap, follows); | |
a8599bd8 SW |
2722 | ceph_put_snap_context(capsnap->context); |
2723 | list_del(&capsnap->ci_item); | |
2724 | list_del(&capsnap->flushing_item); | |
2725 | ceph_put_cap_snap(capsnap); | |
2726 | drop = 1; | |
2727 | break; | |
2728 | } else { | |
2729 | dout(" skipping cap_snap %p follows %lld\n", | |
2730 | capsnap, capsnap->follows); | |
2731 | } | |
2732 | } | |
be655596 | 2733 | spin_unlock(&ci->i_ceph_lock); |
a8599bd8 SW |
2734 | if (drop) |
2735 | iput(inode); | |
2736 | } | |
2737 | ||
2738 | /* | |
2739 | * Handle TRUNC from MDS, indicating file truncation. | |
2740 | * | |
2741 | * caller hold s_mutex. | |
2742 | */ | |
2743 | static void handle_cap_trunc(struct inode *inode, | |
2744 | struct ceph_mds_caps *trunc, | |
2745 | struct ceph_mds_session *session) | |
be655596 | 2746 | __releases(ci->i_ceph_lock) |
a8599bd8 SW |
2747 | { |
2748 | struct ceph_inode_info *ci = ceph_inode(inode); | |
2749 | int mds = session->s_mds; | |
2750 | int seq = le32_to_cpu(trunc->seq); | |
2751 | u32 truncate_seq = le32_to_cpu(trunc->truncate_seq); | |
2752 | u64 truncate_size = le64_to_cpu(trunc->truncate_size); | |
2753 | u64 size = le64_to_cpu(trunc->size); | |
2754 | int implemented = 0; | |
2755 | int dirty = __ceph_caps_dirty(ci); | |
2756 | int issued = __ceph_caps_issued(ceph_inode(inode), &implemented); | |
2757 | int queue_trunc = 0; | |
2758 | ||
2759 | issued |= implemented | dirty; | |
2760 | ||
2761 | dout("handle_cap_trunc inode %p mds%d seq %d to %lld seq %d\n", | |
2762 | inode, mds, seq, truncate_size, truncate_seq); | |
2763 | queue_trunc = ceph_fill_file_size(inode, issued, | |
2764 | truncate_seq, truncate_size, size); | |
be655596 | 2765 | spin_unlock(&ci->i_ceph_lock); |
a8599bd8 | 2766 | |
99ccbd22 | 2767 | if (queue_trunc) { |
3c6f6b79 | 2768 | ceph_queue_vmtruncate(inode); |
99ccbd22 MT |
2769 | ceph_fscache_invalidate(inode); |
2770 | } | |
a8599bd8 SW |
2771 | } |
2772 | ||
2773 | /* | |
2774 | * Handle EXPORT from MDS. Cap is being migrated _from_ this mds to a | |
2775 | * different one. If we are the most recent migration we've seen (as | |
2776 | * indicated by mseq), make note of the migrating cap bits for the | |
2777 | * duration (until we see the corresponding IMPORT). | |
2778 | * | |
2779 | * caller holds s_mutex | |
2780 | */ | |
2781 | static void handle_cap_export(struct inode *inode, struct ceph_mds_caps *ex, | |
11df2dfb YZ |
2782 | struct ceph_mds_cap_peer *ph, |
2783 | struct ceph_mds_session *session) | |
a8599bd8 | 2784 | { |
db354052 | 2785 | struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc; |
11df2dfb YZ |
2786 | struct ceph_mds_session *tsession = NULL; |
2787 | struct ceph_cap *cap, *tcap; | |
a8599bd8 | 2788 | struct ceph_inode_info *ci = ceph_inode(inode); |
11df2dfb | 2789 | u64 t_cap_id; |
a8599bd8 | 2790 | unsigned mseq = le32_to_cpu(ex->migrate_seq); |
11df2dfb YZ |
2791 | unsigned t_seq, t_mseq; |
2792 | int target, issued; | |
2793 | int mds = session->s_mds; | |
a8599bd8 | 2794 | |
11df2dfb YZ |
2795 | if (ph) { |
2796 | t_cap_id = le64_to_cpu(ph->cap_id); | |
2797 | t_seq = le32_to_cpu(ph->seq); | |
2798 | t_mseq = le32_to_cpu(ph->mseq); | |
2799 | target = le32_to_cpu(ph->mds); | |
2800 | } else { | |
2801 | t_cap_id = t_seq = t_mseq = 0; | |
2802 | target = -1; | |
2803 | } | |
a8599bd8 | 2804 | |
11df2dfb YZ |
2805 | dout("handle_cap_export inode %p ci %p mds%d mseq %d target %d\n", |
2806 | inode, ci, mds, mseq, target); | |
2807 | retry: | |
be655596 | 2808 | spin_lock(&ci->i_ceph_lock); |
11df2dfb YZ |
2809 | cap = __get_cap_for_mds(ci, mds); |
2810 | if (!cap) | |
2811 | goto out_unlock; | |
a8599bd8 | 2812 | |
11df2dfb YZ |
2813 | if (target < 0) { |
2814 | __ceph_remove_cap(cap, false); | |
2815 | goto out_unlock; | |
a8599bd8 SW |
2816 | } |
2817 | ||
11df2dfb YZ |
2818 | /* |
2819 | * now we know we haven't received the cap import message yet | |
2820 | * because the exported cap still exist. | |
2821 | */ | |
db354052 | 2822 | |
11df2dfb YZ |
2823 | issued = cap->issued; |
2824 | WARN_ON(issued != cap->implemented); | |
2825 | ||
2826 | tcap = __get_cap_for_mds(ci, target); | |
2827 | if (tcap) { | |
2828 | /* already have caps from the target */ | |
2829 | if (tcap->cap_id != t_cap_id || | |
2830 | ceph_seq_cmp(tcap->seq, t_seq) < 0) { | |
2831 | dout(" updating import cap %p mds%d\n", tcap, target); | |
2832 | tcap->cap_id = t_cap_id; | |
2833 | tcap->seq = t_seq - 1; | |
2834 | tcap->issue_seq = t_seq - 1; | |
2835 | tcap->mseq = t_mseq; | |
2836 | tcap->issued |= issued; | |
2837 | tcap->implemented |= issued; | |
2838 | if (cap == ci->i_auth_cap) | |
2839 | ci->i_auth_cap = tcap; | |
2840 | if (ci->i_flushing_caps && ci->i_auth_cap == tcap) { | |
2841 | spin_lock(&mdsc->cap_dirty_lock); | |
2842 | list_move_tail(&ci->i_flushing_item, | |
2843 | &tcap->session->s_cap_flushing); | |
2844 | spin_unlock(&mdsc->cap_dirty_lock); | |
db354052 | 2845 | } |
a8599bd8 | 2846 | } |
a096b09a | 2847 | __ceph_remove_cap(cap, false); |
11df2dfb YZ |
2848 | goto out_unlock; |
2849 | } | |
2850 | ||
2851 | if (tsession) { | |
2852 | int flag = (cap == ci->i_auth_cap) ? CEPH_CAP_FLAG_AUTH : 0; | |
2853 | spin_unlock(&ci->i_ceph_lock); | |
2854 | /* add placeholder for the export tagert */ | |
2855 | ceph_add_cap(inode, tsession, t_cap_id, -1, issued, 0, | |
2856 | t_seq - 1, t_mseq, (u64)-1, flag, NULL); | |
2857 | goto retry; | |
a8599bd8 SW |
2858 | } |
2859 | ||
be655596 | 2860 | spin_unlock(&ci->i_ceph_lock); |
11df2dfb YZ |
2861 | mutex_unlock(&session->s_mutex); |
2862 | ||
2863 | /* open target session */ | |
2864 | tsession = ceph_mdsc_open_export_target_session(mdsc, target); | |
2865 | if (!IS_ERR(tsession)) { | |
2866 | if (mds > target) { | |
2867 | mutex_lock(&session->s_mutex); | |
2868 | mutex_lock_nested(&tsession->s_mutex, | |
2869 | SINGLE_DEPTH_NESTING); | |
2870 | } else { | |
2871 | mutex_lock(&tsession->s_mutex); | |
2872 | mutex_lock_nested(&session->s_mutex, | |
2873 | SINGLE_DEPTH_NESTING); | |
2874 | } | |
2875 | ceph_add_cap_releases(mdsc, tsession); | |
2876 | } else { | |
2877 | WARN_ON(1); | |
2878 | tsession = NULL; | |
2879 | target = -1; | |
2880 | } | |
2881 | goto retry; | |
2882 | ||
2883 | out_unlock: | |
2884 | spin_unlock(&ci->i_ceph_lock); | |
2885 | mutex_unlock(&session->s_mutex); | |
2886 | if (tsession) { | |
2887 | mutex_unlock(&tsession->s_mutex); | |
2888 | ceph_put_mds_session(tsession); | |
2889 | } | |
a8599bd8 SW |
2890 | } |
2891 | ||
2892 | /* | |
2893 | * Handle cap IMPORT. If there are temp bits from an older EXPORT, | |
2894 | * clean them up. | |
2895 | * | |
2896 | * caller holds s_mutex. | |
2897 | */ | |
2898 | static void handle_cap_import(struct ceph_mds_client *mdsc, | |
2899 | struct inode *inode, struct ceph_mds_caps *im, | |
4ee6a914 | 2900 | struct ceph_mds_cap_peer *ph, |
a8599bd8 SW |
2901 | struct ceph_mds_session *session, |
2902 | void *snaptrace, int snaptrace_len) | |
2903 | { | |
2904 | struct ceph_inode_info *ci = ceph_inode(inode); | |
4ee6a914 | 2905 | struct ceph_cap *cap; |
a8599bd8 SW |
2906 | int mds = session->s_mds; |
2907 | unsigned issued = le32_to_cpu(im->caps); | |
2908 | unsigned wanted = le32_to_cpu(im->wanted); | |
2909 | unsigned seq = le32_to_cpu(im->seq); | |
2910 | unsigned mseq = le32_to_cpu(im->migrate_seq); | |
2911 | u64 realmino = le64_to_cpu(im->realm); | |
2912 | u64 cap_id = le64_to_cpu(im->cap_id); | |
4ee6a914 YZ |
2913 | u64 p_cap_id; |
2914 | int peer; | |
a8599bd8 | 2915 | |
4ee6a914 YZ |
2916 | if (ph) { |
2917 | p_cap_id = le64_to_cpu(ph->cap_id); | |
2918 | peer = le32_to_cpu(ph->mds); | |
2919 | } else { | |
2920 | p_cap_id = 0; | |
2921 | peer = -1; | |
2922 | } | |
db354052 | 2923 | |
4ee6a914 YZ |
2924 | dout("handle_cap_import inode %p ci %p mds%d mseq %d peer %d\n", |
2925 | inode, ci, mds, mseq, peer); | |
2926 | ||
2927 | spin_lock(&ci->i_ceph_lock); | |
2928 | cap = peer >= 0 ? __get_cap_for_mds(ci, peer) : NULL; | |
2929 | if (cap && cap->cap_id == p_cap_id) { | |
2930 | dout(" remove export cap %p mds%d flags %d\n", | |
2931 | cap, peer, ph->flags); | |
2932 | if ((ph->flags & CEPH_CAP_FLAG_AUTH) && | |
2933 | (cap->seq != le32_to_cpu(ph->seq) || | |
2934 | cap->mseq != le32_to_cpu(ph->mseq))) { | |
2935 | pr_err("handle_cap_import: mismatched seq/mseq: " | |
2936 | "ino (%llx.%llx) mds%d seq %d mseq %d " | |
2937 | "importer mds%d has peer seq %d mseq %d\n", | |
2938 | ceph_vinop(inode), peer, cap->seq, | |
2939 | cap->mseq, mds, le32_to_cpu(ph->seq), | |
2940 | le32_to_cpu(ph->mseq)); | |
db354052 | 2941 | } |
4ee6a914 YZ |
2942 | ci->i_cap_exporting_issued = cap->issued; |
2943 | __ceph_remove_cap(cap, (ph->flags & CEPH_CAP_FLAG_RELEASE)); | |
a8599bd8 SW |
2944 | } |
2945 | ||
4ee6a914 YZ |
2946 | /* make sure we re-request max_size, if necessary */ |
2947 | ci->i_wanted_max_size = 0; | |
2948 | ci->i_requested_max_size = 0; | |
2949 | spin_unlock(&ci->i_ceph_lock); | |
2950 | ||
a8599bd8 SW |
2951 | down_write(&mdsc->snap_rwsem); |
2952 | ceph_update_snap_trace(mdsc, snaptrace, snaptrace+snaptrace_len, | |
2953 | false); | |
2954 | downgrade_write(&mdsc->snap_rwsem); | |
2955 | ceph_add_cap(inode, session, cap_id, -1, | |
2956 | issued, wanted, seq, mseq, realmino, CEPH_CAP_FLAG_AUTH, | |
2957 | NULL /* no caps context */); | |
088b3f5e | 2958 | kick_flushing_inode_caps(mdsc, session, inode); |
a8599bd8 | 2959 | up_read(&mdsc->snap_rwsem); |
feb4cc9b | 2960 | |
a8599bd8 SW |
2961 | } |
2962 | ||
2963 | /* | |
2964 | * Handle a caps message from the MDS. | |
2965 | * | |
2966 | * Identify the appropriate session, inode, and call the right handler | |
2967 | * based on the cap op. | |
2968 | */ | |
2969 | void ceph_handle_caps(struct ceph_mds_session *session, | |
2970 | struct ceph_msg *msg) | |
2971 | { | |
2972 | struct ceph_mds_client *mdsc = session->s_mdsc; | |
3d14c5d2 | 2973 | struct super_block *sb = mdsc->fsc->sb; |
a8599bd8 | 2974 | struct inode *inode; |
be655596 | 2975 | struct ceph_inode_info *ci; |
a8599bd8 SW |
2976 | struct ceph_cap *cap; |
2977 | struct ceph_mds_caps *h; | |
4ee6a914 | 2978 | struct ceph_mds_cap_peer *peer = NULL; |
2600d2dd | 2979 | int mds = session->s_mds; |
a8599bd8 | 2980 | int op; |
3d7ded4d | 2981 | u32 seq, mseq; |
a8599bd8 SW |
2982 | struct ceph_vino vino; |
2983 | u64 cap_id; | |
2984 | u64 size, max_size; | |
6df058c0 | 2985 | u64 tid; |
70edb55b | 2986 | void *snaptrace; |
ce1fbc8d SW |
2987 | size_t snaptrace_len; |
2988 | void *flock; | |
4ee6a914 | 2989 | void *end; |
ce1fbc8d | 2990 | u32 flock_len; |
a8599bd8 SW |
2991 | |
2992 | dout("handle_caps from mds%d\n", mds); | |
2993 | ||
2994 | /* decode */ | |
4ee6a914 | 2995 | end = msg->front.iov_base + msg->front.iov_len; |
6df058c0 | 2996 | tid = le64_to_cpu(msg->hdr.tid); |
a8599bd8 SW |
2997 | if (msg->front.iov_len < sizeof(*h)) |
2998 | goto bad; | |
2999 | h = msg->front.iov_base; | |
3000 | op = le32_to_cpu(h->op); | |
3001 | vino.ino = le64_to_cpu(h->ino); | |
3002 | vino.snap = CEPH_NOSNAP; | |
3003 | cap_id = le64_to_cpu(h->cap_id); | |
3004 | seq = le32_to_cpu(h->seq); | |
3d7ded4d | 3005 | mseq = le32_to_cpu(h->migrate_seq); |
a8599bd8 SW |
3006 | size = le64_to_cpu(h->size); |
3007 | max_size = le64_to_cpu(h->max_size); | |
3008 | ||
ce1fbc8d SW |
3009 | snaptrace = h + 1; |
3010 | snaptrace_len = le32_to_cpu(h->snap_trace_len); | |
3011 | ||
3012 | if (le16_to_cpu(msg->hdr.version) >= 2) { | |
4ee6a914 | 3013 | void *p = snaptrace + snaptrace_len; |
ce1fbc8d | 3014 | ceph_decode_32_safe(&p, end, flock_len, bad); |
4ee6a914 YZ |
3015 | if (p + flock_len > end) |
3016 | goto bad; | |
ce1fbc8d SW |
3017 | flock = p; |
3018 | } else { | |
3019 | flock = NULL; | |
3020 | flock_len = 0; | |
3021 | } | |
3022 | ||
4ee6a914 YZ |
3023 | if (le16_to_cpu(msg->hdr.version) >= 3) { |
3024 | if (op == CEPH_CAP_OP_IMPORT) { | |
3025 | void *p = flock + flock_len; | |
3026 | if (p + sizeof(*peer) > end) | |
3027 | goto bad; | |
3028 | peer = p; | |
11df2dfb YZ |
3029 | } else if (op == CEPH_CAP_OP_EXPORT) { |
3030 | /* recorded in unused fields */ | |
3031 | peer = (void *)&h->size; | |
4ee6a914 YZ |
3032 | } |
3033 | } | |
3034 | ||
a8599bd8 SW |
3035 | mutex_lock(&session->s_mutex); |
3036 | session->s_seq++; | |
3037 | dout(" mds%d seq %lld cap seq %u\n", session->s_mds, session->s_seq, | |
3038 | (unsigned)seq); | |
3039 | ||
66f58691 YZ |
3040 | if (op == CEPH_CAP_OP_IMPORT) |
3041 | ceph_add_cap_releases(mdsc, session); | |
3042 | ||
a8599bd8 SW |
3043 | /* lookup ino */ |
3044 | inode = ceph_find_inode(sb, vino); | |
be655596 | 3045 | ci = ceph_inode(inode); |
a8599bd8 SW |
3046 | dout(" op %s ino %llx.%llx inode %p\n", ceph_cap_op_name(op), vino.ino, |
3047 | vino.snap, inode); | |
3048 | if (!inode) { | |
3049 | dout(" i don't have ino %llx\n", vino.ino); | |
3d7ded4d | 3050 | |
a096b09a YZ |
3051 | if (op == CEPH_CAP_OP_IMPORT) { |
3052 | spin_lock(&session->s_cap_lock); | |
3d7ded4d SW |
3053 | __queue_cap_release(session, vino.ino, cap_id, |
3054 | mseq, seq); | |
a096b09a YZ |
3055 | spin_unlock(&session->s_cap_lock); |
3056 | } | |
21b559de | 3057 | goto flush_cap_releases; |
a8599bd8 SW |
3058 | } |
3059 | ||
3060 | /* these will work even if we don't have a cap yet */ | |
3061 | switch (op) { | |
3062 | case CEPH_CAP_OP_FLUSHSNAP_ACK: | |
6df058c0 | 3063 | handle_cap_flushsnap_ack(inode, tid, h, session); |
a8599bd8 SW |
3064 | goto done; |
3065 | ||
3066 | case CEPH_CAP_OP_EXPORT: | |
11df2dfb YZ |
3067 | handle_cap_export(inode, h, peer, session); |
3068 | goto done_unlocked; | |
a8599bd8 SW |
3069 | |
3070 | case CEPH_CAP_OP_IMPORT: | |
4ee6a914 | 3071 | handle_cap_import(mdsc, inode, h, peer, session, |
ce1fbc8d | 3072 | snaptrace, snaptrace_len); |
a8599bd8 SW |
3073 | } |
3074 | ||
3075 | /* the rest require a cap */ | |
be655596 | 3076 | spin_lock(&ci->i_ceph_lock); |
a8599bd8 SW |
3077 | cap = __get_cap_for_mds(ceph_inode(inode), mds); |
3078 | if (!cap) { | |
9dbd412f | 3079 | dout(" no cap on %p ino %llx.%llx from mds%d\n", |
a8599bd8 | 3080 | inode, ceph_ino(inode), ceph_snap(inode), mds); |
be655596 | 3081 | spin_unlock(&ci->i_ceph_lock); |
21b559de | 3082 | goto flush_cap_releases; |
a8599bd8 SW |
3083 | } |
3084 | ||
be655596 | 3085 | /* note that each of these drops i_ceph_lock for us */ |
a8599bd8 SW |
3086 | switch (op) { |
3087 | case CEPH_CAP_OP_REVOKE: | |
3088 | case CEPH_CAP_OP_GRANT: | |
0e5e1774 | 3089 | case CEPH_CAP_OP_IMPORT: |
15637c8b SW |
3090 | handle_cap_grant(inode, h, session, cap, msg->middle); |
3091 | goto done_unlocked; | |
a8599bd8 SW |
3092 | |
3093 | case CEPH_CAP_OP_FLUSH_ACK: | |
6df058c0 | 3094 | handle_cap_flush_ack(inode, tid, h, session, cap); |
a8599bd8 SW |
3095 | break; |
3096 | ||
3097 | case CEPH_CAP_OP_TRUNC: | |
3098 | handle_cap_trunc(inode, h, session); | |
3099 | break; | |
3100 | ||
3101 | default: | |
be655596 | 3102 | spin_unlock(&ci->i_ceph_lock); |
a8599bd8 SW |
3103 | pr_err("ceph_handle_caps: unknown cap op %d %s\n", op, |
3104 | ceph_cap_op_name(op)); | |
3105 | } | |
3106 | ||
21b559de GF |
3107 | goto done; |
3108 | ||
3109 | flush_cap_releases: | |
3110 | /* | |
3111 | * send any full release message to try to move things | |
3112 | * along for the mds (who clearly thinks we still have this | |
3113 | * cap). | |
3114 | */ | |
3115 | ceph_add_cap_releases(mdsc, session); | |
3116 | ceph_send_cap_releases(mdsc, session); | |
3117 | ||
a8599bd8 | 3118 | done: |
15637c8b SW |
3119 | mutex_unlock(&session->s_mutex); |
3120 | done_unlocked: | |
a8599bd8 SW |
3121 | if (inode) |
3122 | iput(inode); | |
3123 | return; | |
3124 | ||
3125 | bad: | |
3126 | pr_err("ceph_handle_caps: corrupt message\n"); | |
9ec7cab1 | 3127 | ceph_msg_dump(msg); |
a8599bd8 SW |
3128 | return; |
3129 | } | |
3130 | ||
3131 | /* | |
3132 | * Delayed work handler to process end of delayed cap release LRU list. | |
3133 | */ | |
afcdaea3 | 3134 | void ceph_check_delayed_caps(struct ceph_mds_client *mdsc) |
a8599bd8 SW |
3135 | { |
3136 | struct ceph_inode_info *ci; | |
3137 | int flags = CHECK_CAPS_NODELAY; | |
3138 | ||
a8599bd8 SW |
3139 | dout("check_delayed_caps\n"); |
3140 | while (1) { | |
3141 | spin_lock(&mdsc->cap_delay_lock); | |
3142 | if (list_empty(&mdsc->cap_delay_list)) | |
3143 | break; | |
3144 | ci = list_first_entry(&mdsc->cap_delay_list, | |
3145 | struct ceph_inode_info, | |
3146 | i_cap_delay_list); | |
3147 | if ((ci->i_ceph_flags & CEPH_I_FLUSH) == 0 && | |
3148 | time_before(jiffies, ci->i_hold_caps_max)) | |
3149 | break; | |
3150 | list_del_init(&ci->i_cap_delay_list); | |
3151 | spin_unlock(&mdsc->cap_delay_lock); | |
3152 | dout("check_delayed_caps on %p\n", &ci->vfs_inode); | |
3153 | ceph_check_caps(ci, flags, NULL); | |
3154 | } | |
3155 | spin_unlock(&mdsc->cap_delay_lock); | |
3156 | } | |
3157 | ||
afcdaea3 SW |
3158 | /* |
3159 | * Flush all dirty caps to the mds | |
3160 | */ | |
3161 | void ceph_flush_dirty_caps(struct ceph_mds_client *mdsc) | |
3162 | { | |
db354052 SW |
3163 | struct ceph_inode_info *ci; |
3164 | struct inode *inode; | |
afcdaea3 SW |
3165 | |
3166 | dout("flush_dirty_caps\n"); | |
3167 | spin_lock(&mdsc->cap_dirty_lock); | |
db354052 SW |
3168 | while (!list_empty(&mdsc->cap_dirty)) { |
3169 | ci = list_first_entry(&mdsc->cap_dirty, struct ceph_inode_info, | |
3170 | i_dirty_item); | |
70b666c3 SW |
3171 | inode = &ci->vfs_inode; |
3172 | ihold(inode); | |
db354052 | 3173 | dout("flush_dirty_caps %p\n", inode); |
afcdaea3 | 3174 | spin_unlock(&mdsc->cap_dirty_lock); |
70b666c3 SW |
3175 | ceph_check_caps(ci, CHECK_CAPS_NODELAY|CHECK_CAPS_FLUSH, NULL); |
3176 | iput(inode); | |
afcdaea3 SW |
3177 | spin_lock(&mdsc->cap_dirty_lock); |
3178 | } | |
3179 | spin_unlock(&mdsc->cap_dirty_lock); | |
db354052 | 3180 | dout("flush_dirty_caps done\n"); |
afcdaea3 SW |
3181 | } |
3182 | ||
a8599bd8 SW |
3183 | /* |
3184 | * Drop open file reference. If we were the last open file, | |
3185 | * we may need to release capabilities to the MDS (or schedule | |
3186 | * their delayed release). | |
3187 | */ | |
3188 | void ceph_put_fmode(struct ceph_inode_info *ci, int fmode) | |
3189 | { | |
3190 | struct inode *inode = &ci->vfs_inode; | |
3191 | int last = 0; | |
3192 | ||
be655596 | 3193 | spin_lock(&ci->i_ceph_lock); |
a8599bd8 SW |
3194 | dout("put_fmode %p fmode %d %d -> %d\n", inode, fmode, |
3195 | ci->i_nr_by_mode[fmode], ci->i_nr_by_mode[fmode]-1); | |
3196 | BUG_ON(ci->i_nr_by_mode[fmode] == 0); | |
3197 | if (--ci->i_nr_by_mode[fmode] == 0) | |
3198 | last++; | |
be655596 | 3199 | spin_unlock(&ci->i_ceph_lock); |
a8599bd8 SW |
3200 | |
3201 | if (last && ci->i_vino.snap == CEPH_NOSNAP) | |
3202 | ceph_check_caps(ci, 0, NULL); | |
3203 | } | |
3204 | ||
3205 | /* | |
3206 | * Helpers for embedding cap and dentry lease releases into mds | |
3207 | * requests. | |
3208 | * | |
3209 | * @force is used by dentry_release (below) to force inclusion of a | |
3210 | * record for the directory inode, even when there aren't any caps to | |
3211 | * drop. | |
3212 | */ | |
3213 | int ceph_encode_inode_release(void **p, struct inode *inode, | |
3214 | int mds, int drop, int unless, int force) | |
3215 | { | |
3216 | struct ceph_inode_info *ci = ceph_inode(inode); | |
3217 | struct ceph_cap *cap; | |
3218 | struct ceph_mds_request_release *rel = *p; | |
ec97f88b | 3219 | int used, dirty; |
a8599bd8 | 3220 | int ret = 0; |
a8599bd8 | 3221 | |
be655596 | 3222 | spin_lock(&ci->i_ceph_lock); |
916623da | 3223 | used = __ceph_caps_used(ci); |
ec97f88b | 3224 | dirty = __ceph_caps_dirty(ci); |
916623da | 3225 | |
ec97f88b SW |
3226 | dout("encode_inode_release %p mds%d used|dirty %s drop %s unless %s\n", |
3227 | inode, mds, ceph_cap_string(used|dirty), ceph_cap_string(drop), | |
916623da SW |
3228 | ceph_cap_string(unless)); |
3229 | ||
ec97f88b SW |
3230 | /* only drop unused, clean caps */ |
3231 | drop &= ~(used | dirty); | |
916623da | 3232 | |
a8599bd8 SW |
3233 | cap = __get_cap_for_mds(ci, mds); |
3234 | if (cap && __cap_is_valid(cap)) { | |
3235 | if (force || | |
3236 | ((cap->issued & drop) && | |
3237 | (cap->issued & unless) == 0)) { | |
3238 | if ((cap->issued & drop) && | |
3239 | (cap->issued & unless) == 0) { | |
bb137f84 YZ |
3240 | int wanted = __ceph_caps_wanted(ci); |
3241 | if ((ci->i_ceph_flags & CEPH_I_NODELAY) == 0) | |
3242 | wanted |= cap->mds_wanted; | |
3243 | dout("encode_inode_release %p cap %p " | |
3244 | "%s -> %s, wanted %s -> %s\n", inode, cap, | |
a8599bd8 | 3245 | ceph_cap_string(cap->issued), |
bb137f84 YZ |
3246 | ceph_cap_string(cap->issued & ~drop), |
3247 | ceph_cap_string(cap->mds_wanted), | |
3248 | ceph_cap_string(wanted)); | |
3249 | ||
a8599bd8 SW |
3250 | cap->issued &= ~drop; |
3251 | cap->implemented &= ~drop; | |
bb137f84 | 3252 | cap->mds_wanted = wanted; |
a8599bd8 SW |
3253 | } else { |
3254 | dout("encode_inode_release %p cap %p %s" | |
3255 | " (force)\n", inode, cap, | |
3256 | ceph_cap_string(cap->issued)); | |
3257 | } | |
3258 | ||
3259 | rel->ino = cpu_to_le64(ceph_ino(inode)); | |
3260 | rel->cap_id = cpu_to_le64(cap->cap_id); | |
3261 | rel->seq = cpu_to_le32(cap->seq); | |
3262 | rel->issue_seq = cpu_to_le32(cap->issue_seq), | |
3263 | rel->mseq = cpu_to_le32(cap->mseq); | |
fd7b95cd | 3264 | rel->caps = cpu_to_le32(cap->implemented); |
a8599bd8 SW |
3265 | rel->wanted = cpu_to_le32(cap->mds_wanted); |
3266 | rel->dname_len = 0; | |
3267 | rel->dname_seq = 0; | |
3268 | *p += sizeof(*rel); | |
3269 | ret = 1; | |
3270 | } else { | |
3271 | dout("encode_inode_release %p cap %p %s\n", | |
3272 | inode, cap, ceph_cap_string(cap->issued)); | |
3273 | } | |
3274 | } | |
be655596 | 3275 | spin_unlock(&ci->i_ceph_lock); |
a8599bd8 SW |
3276 | return ret; |
3277 | } | |
3278 | ||
3279 | int ceph_encode_dentry_release(void **p, struct dentry *dentry, | |
3280 | int mds, int drop, int unless) | |
3281 | { | |
3282 | struct inode *dir = dentry->d_parent->d_inode; | |
3283 | struct ceph_mds_request_release *rel = *p; | |
3284 | struct ceph_dentry_info *di = ceph_dentry(dentry); | |
3285 | int force = 0; | |
3286 | int ret; | |
3287 | ||
3288 | /* | |
3289 | * force an record for the directory caps if we have a dentry lease. | |
be655596 | 3290 | * this is racy (can't take i_ceph_lock and d_lock together), but it |
a8599bd8 SW |
3291 | * doesn't have to be perfect; the mds will revoke anything we don't |
3292 | * release. | |
3293 | */ | |
3294 | spin_lock(&dentry->d_lock); | |
3295 | if (di->lease_session && di->lease_session->s_mds == mds) | |
3296 | force = 1; | |
3297 | spin_unlock(&dentry->d_lock); | |
3298 | ||
3299 | ret = ceph_encode_inode_release(p, dir, mds, drop, unless, force); | |
3300 | ||
3301 | spin_lock(&dentry->d_lock); | |
3302 | if (ret && di->lease_session && di->lease_session->s_mds == mds) { | |
3303 | dout("encode_dentry_release %p mds%d seq %d\n", | |
3304 | dentry, mds, (int)di->lease_seq); | |
3305 | rel->dname_len = cpu_to_le32(dentry->d_name.len); | |
3306 | memcpy(*p, dentry->d_name.name, dentry->d_name.len); | |
3307 | *p += dentry->d_name.len; | |
3308 | rel->dname_seq = cpu_to_le32(di->lease_seq); | |
1dadcce3 | 3309 | __ceph_mdsc_drop_dentry_lease(dentry); |
a8599bd8 SW |
3310 | } |
3311 | spin_unlock(&dentry->d_lock); | |
3312 | return ret; | |
3313 | } |