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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> | |
174cd4b1 | 5 | #include <linux/sched/signal.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 | ||
0e294387 | 43 | static u64 __get_oldest_flush_tid(struct ceph_mds_client *mdsc); |
7bc00fdd YZ |
44 | static void __kick_flushing_caps(struct ceph_mds_client *mdsc, |
45 | struct ceph_mds_session *session, | |
46 | struct ceph_inode_info *ci, | |
47 | u64 oldest_flush_tid); | |
a8599bd8 SW |
48 | |
49 | /* | |
50 | * Generate readable cap strings for debugging output. | |
51 | */ | |
52 | #define MAX_CAP_STR 20 | |
53 | static char cap_str[MAX_CAP_STR][40]; | |
54 | static DEFINE_SPINLOCK(cap_str_lock); | |
55 | static int last_cap_str; | |
56 | ||
57 | static char *gcap_string(char *s, int c) | |
58 | { | |
59 | if (c & CEPH_CAP_GSHARED) | |
60 | *s++ = 's'; | |
61 | if (c & CEPH_CAP_GEXCL) | |
62 | *s++ = 'x'; | |
63 | if (c & CEPH_CAP_GCACHE) | |
64 | *s++ = 'c'; | |
65 | if (c & CEPH_CAP_GRD) | |
66 | *s++ = 'r'; | |
67 | if (c & CEPH_CAP_GWR) | |
68 | *s++ = 'w'; | |
69 | if (c & CEPH_CAP_GBUFFER) | |
70 | *s++ = 'b'; | |
71 | if (c & CEPH_CAP_GLAZYIO) | |
72 | *s++ = 'l'; | |
73 | return s; | |
74 | } | |
75 | ||
76 | const char *ceph_cap_string(int caps) | |
77 | { | |
78 | int i; | |
79 | char *s; | |
80 | int c; | |
81 | ||
82 | spin_lock(&cap_str_lock); | |
83 | i = last_cap_str++; | |
84 | if (last_cap_str == MAX_CAP_STR) | |
85 | last_cap_str = 0; | |
86 | spin_unlock(&cap_str_lock); | |
87 | ||
88 | s = cap_str[i]; | |
89 | ||
90 | if (caps & CEPH_CAP_PIN) | |
91 | *s++ = 'p'; | |
92 | ||
93 | c = (caps >> CEPH_CAP_SAUTH) & 3; | |
94 | if (c) { | |
95 | *s++ = 'A'; | |
96 | s = gcap_string(s, c); | |
97 | } | |
98 | ||
99 | c = (caps >> CEPH_CAP_SLINK) & 3; | |
100 | if (c) { | |
101 | *s++ = 'L'; | |
102 | s = gcap_string(s, c); | |
103 | } | |
104 | ||
105 | c = (caps >> CEPH_CAP_SXATTR) & 3; | |
106 | if (c) { | |
107 | *s++ = 'X'; | |
108 | s = gcap_string(s, c); | |
109 | } | |
110 | ||
111 | c = caps >> CEPH_CAP_SFILE; | |
112 | if (c) { | |
113 | *s++ = 'F'; | |
114 | s = gcap_string(s, c); | |
115 | } | |
116 | ||
117 | if (s == cap_str[i]) | |
118 | *s++ = '-'; | |
119 | *s = 0; | |
120 | return cap_str[i]; | |
121 | } | |
122 | ||
37151668 | 123 | void ceph_caps_init(struct ceph_mds_client *mdsc) |
a8599bd8 | 124 | { |
37151668 YS |
125 | INIT_LIST_HEAD(&mdsc->caps_list); |
126 | spin_lock_init(&mdsc->caps_list_lock); | |
a8599bd8 SW |
127 | } |
128 | ||
37151668 | 129 | void ceph_caps_finalize(struct ceph_mds_client *mdsc) |
a8599bd8 SW |
130 | { |
131 | struct ceph_cap *cap; | |
132 | ||
37151668 YS |
133 | spin_lock(&mdsc->caps_list_lock); |
134 | while (!list_empty(&mdsc->caps_list)) { | |
135 | cap = list_first_entry(&mdsc->caps_list, | |
136 | struct ceph_cap, caps_item); | |
a8599bd8 SW |
137 | list_del(&cap->caps_item); |
138 | kmem_cache_free(ceph_cap_cachep, cap); | |
139 | } | |
37151668 YS |
140 | mdsc->caps_total_count = 0; |
141 | mdsc->caps_avail_count = 0; | |
142 | mdsc->caps_use_count = 0; | |
143 | mdsc->caps_reserve_count = 0; | |
144 | mdsc->caps_min_count = 0; | |
145 | spin_unlock(&mdsc->caps_list_lock); | |
85ccce43 SW |
146 | } |
147 | ||
37151668 | 148 | void ceph_adjust_min_caps(struct ceph_mds_client *mdsc, int delta) |
85ccce43 | 149 | { |
37151668 YS |
150 | spin_lock(&mdsc->caps_list_lock); |
151 | mdsc->caps_min_count += delta; | |
152 | BUG_ON(mdsc->caps_min_count < 0); | |
153 | spin_unlock(&mdsc->caps_list_lock); | |
a8599bd8 SW |
154 | } |
155 | ||
93faca6e | 156 | void ceph_reserve_caps(struct ceph_mds_client *mdsc, |
37151668 | 157 | struct ceph_cap_reservation *ctx, int need) |
a8599bd8 SW |
158 | { |
159 | int i; | |
160 | struct ceph_cap *cap; | |
161 | int have; | |
162 | int alloc = 0; | |
163 | LIST_HEAD(newcaps); | |
a8599bd8 SW |
164 | |
165 | dout("reserve caps ctx=%p need=%d\n", ctx, need); | |
166 | ||
167 | /* first reserve any caps that are already allocated */ | |
37151668 YS |
168 | spin_lock(&mdsc->caps_list_lock); |
169 | if (mdsc->caps_avail_count >= need) | |
a8599bd8 SW |
170 | have = need; |
171 | else | |
37151668 YS |
172 | have = mdsc->caps_avail_count; |
173 | mdsc->caps_avail_count -= have; | |
174 | mdsc->caps_reserve_count += have; | |
175 | BUG_ON(mdsc->caps_total_count != mdsc->caps_use_count + | |
176 | mdsc->caps_reserve_count + | |
177 | mdsc->caps_avail_count); | |
178 | spin_unlock(&mdsc->caps_list_lock); | |
a8599bd8 SW |
179 | |
180 | for (i = have; i < need; i++) { | |
181 | cap = kmem_cache_alloc(ceph_cap_cachep, GFP_NOFS); | |
93faca6e | 182 | if (!cap) |
183 | break; | |
a8599bd8 SW |
184 | list_add(&cap->caps_item, &newcaps); |
185 | alloc++; | |
186 | } | |
93faca6e | 187 | /* we didn't manage to reserve as much as we needed */ |
188 | if (have + alloc != need) | |
189 | pr_warn("reserve caps ctx=%p ENOMEM need=%d got=%d\n", | |
190 | ctx, need, have + alloc); | |
a8599bd8 | 191 | |
37151668 YS |
192 | spin_lock(&mdsc->caps_list_lock); |
193 | mdsc->caps_total_count += alloc; | |
194 | mdsc->caps_reserve_count += alloc; | |
195 | list_splice(&newcaps, &mdsc->caps_list); | |
a8599bd8 | 196 | |
37151668 YS |
197 | BUG_ON(mdsc->caps_total_count != mdsc->caps_use_count + |
198 | mdsc->caps_reserve_count + | |
199 | mdsc->caps_avail_count); | |
200 | spin_unlock(&mdsc->caps_list_lock); | |
a8599bd8 SW |
201 | |
202 | ctx->count = need; | |
203 | dout("reserve caps ctx=%p %d = %d used + %d resv + %d avail\n", | |
37151668 YS |
204 | ctx, mdsc->caps_total_count, mdsc->caps_use_count, |
205 | mdsc->caps_reserve_count, mdsc->caps_avail_count); | |
a8599bd8 SW |
206 | } |
207 | ||
37151668 YS |
208 | int ceph_unreserve_caps(struct ceph_mds_client *mdsc, |
209 | struct ceph_cap_reservation *ctx) | |
a8599bd8 SW |
210 | { |
211 | dout("unreserve caps ctx=%p count=%d\n", ctx, ctx->count); | |
212 | if (ctx->count) { | |
37151668 YS |
213 | spin_lock(&mdsc->caps_list_lock); |
214 | BUG_ON(mdsc->caps_reserve_count < ctx->count); | |
215 | mdsc->caps_reserve_count -= ctx->count; | |
216 | mdsc->caps_avail_count += ctx->count; | |
a8599bd8 SW |
217 | ctx->count = 0; |
218 | dout("unreserve caps %d = %d used + %d resv + %d avail\n", | |
37151668 YS |
219 | mdsc->caps_total_count, mdsc->caps_use_count, |
220 | mdsc->caps_reserve_count, mdsc->caps_avail_count); | |
221 | BUG_ON(mdsc->caps_total_count != mdsc->caps_use_count + | |
222 | mdsc->caps_reserve_count + | |
223 | mdsc->caps_avail_count); | |
224 | spin_unlock(&mdsc->caps_list_lock); | |
a8599bd8 SW |
225 | } |
226 | return 0; | |
227 | } | |
228 | ||
d9df2783 YZ |
229 | struct ceph_cap *ceph_get_cap(struct ceph_mds_client *mdsc, |
230 | struct ceph_cap_reservation *ctx) | |
a8599bd8 SW |
231 | { |
232 | struct ceph_cap *cap = NULL; | |
233 | ||
234 | /* temporary, until we do something about cap import/export */ | |
443b3760 SW |
235 | if (!ctx) { |
236 | cap = kmem_cache_alloc(ceph_cap_cachep, GFP_NOFS); | |
237 | if (cap) { | |
4d1d0534 | 238 | spin_lock(&mdsc->caps_list_lock); |
37151668 YS |
239 | mdsc->caps_use_count++; |
240 | mdsc->caps_total_count++; | |
4d1d0534 | 241 | spin_unlock(&mdsc->caps_list_lock); |
443b3760 SW |
242 | } |
243 | return cap; | |
244 | } | |
a8599bd8 | 245 | |
37151668 | 246 | spin_lock(&mdsc->caps_list_lock); |
a8599bd8 | 247 | dout("get_cap ctx=%p (%d) %d = %d used + %d resv + %d avail\n", |
37151668 YS |
248 | ctx, ctx->count, mdsc->caps_total_count, mdsc->caps_use_count, |
249 | mdsc->caps_reserve_count, mdsc->caps_avail_count); | |
a8599bd8 | 250 | BUG_ON(!ctx->count); |
37151668 YS |
251 | BUG_ON(ctx->count > mdsc->caps_reserve_count); |
252 | BUG_ON(list_empty(&mdsc->caps_list)); | |
a8599bd8 SW |
253 | |
254 | ctx->count--; | |
37151668 YS |
255 | mdsc->caps_reserve_count--; |
256 | mdsc->caps_use_count++; | |
a8599bd8 | 257 | |
37151668 | 258 | cap = list_first_entry(&mdsc->caps_list, struct ceph_cap, caps_item); |
a8599bd8 SW |
259 | list_del(&cap->caps_item); |
260 | ||
37151668 YS |
261 | BUG_ON(mdsc->caps_total_count != mdsc->caps_use_count + |
262 | mdsc->caps_reserve_count + mdsc->caps_avail_count); | |
263 | spin_unlock(&mdsc->caps_list_lock); | |
a8599bd8 SW |
264 | return cap; |
265 | } | |
266 | ||
37151668 | 267 | void ceph_put_cap(struct ceph_mds_client *mdsc, struct ceph_cap *cap) |
a8599bd8 | 268 | { |
37151668 | 269 | spin_lock(&mdsc->caps_list_lock); |
7c1332b8 | 270 | dout("put_cap %p %d = %d used + %d resv + %d avail\n", |
37151668 YS |
271 | cap, mdsc->caps_total_count, mdsc->caps_use_count, |
272 | mdsc->caps_reserve_count, mdsc->caps_avail_count); | |
273 | mdsc->caps_use_count--; | |
a8599bd8 | 274 | /* |
85ccce43 SW |
275 | * Keep some preallocated caps around (ceph_min_count), to |
276 | * avoid lots of free/alloc churn. | |
a8599bd8 | 277 | */ |
37151668 YS |
278 | if (mdsc->caps_avail_count >= mdsc->caps_reserve_count + |
279 | mdsc->caps_min_count) { | |
280 | mdsc->caps_total_count--; | |
a8599bd8 SW |
281 | kmem_cache_free(ceph_cap_cachep, cap); |
282 | } else { | |
37151668 YS |
283 | mdsc->caps_avail_count++; |
284 | list_add(&cap->caps_item, &mdsc->caps_list); | |
a8599bd8 SW |
285 | } |
286 | ||
37151668 YS |
287 | BUG_ON(mdsc->caps_total_count != mdsc->caps_use_count + |
288 | mdsc->caps_reserve_count + mdsc->caps_avail_count); | |
289 | spin_unlock(&mdsc->caps_list_lock); | |
a8599bd8 SW |
290 | } |
291 | ||
3d14c5d2 | 292 | void ceph_reservation_status(struct ceph_fs_client *fsc, |
85ccce43 SW |
293 | int *total, int *avail, int *used, int *reserved, |
294 | int *min) | |
a8599bd8 | 295 | { |
3d14c5d2 | 296 | struct ceph_mds_client *mdsc = fsc->mdsc; |
37151668 | 297 | |
a8599bd8 | 298 | if (total) |
37151668 | 299 | *total = mdsc->caps_total_count; |
a8599bd8 | 300 | if (avail) |
37151668 | 301 | *avail = mdsc->caps_avail_count; |
a8599bd8 | 302 | if (used) |
37151668 | 303 | *used = mdsc->caps_use_count; |
a8599bd8 | 304 | if (reserved) |
37151668 | 305 | *reserved = mdsc->caps_reserve_count; |
85ccce43 | 306 | if (min) |
37151668 | 307 | *min = mdsc->caps_min_count; |
a8599bd8 SW |
308 | } |
309 | ||
310 | /* | |
311 | * Find ceph_cap for given mds, if any. | |
312 | * | |
be655596 | 313 | * Called with i_ceph_lock held. |
a8599bd8 SW |
314 | */ |
315 | static struct ceph_cap *__get_cap_for_mds(struct ceph_inode_info *ci, int mds) | |
316 | { | |
317 | struct ceph_cap *cap; | |
318 | struct rb_node *n = ci->i_caps.rb_node; | |
319 | ||
320 | while (n) { | |
321 | cap = rb_entry(n, struct ceph_cap, ci_node); | |
322 | if (mds < cap->mds) | |
323 | n = n->rb_left; | |
324 | else if (mds > cap->mds) | |
325 | n = n->rb_right; | |
326 | else | |
327 | return cap; | |
328 | } | |
329 | return NULL; | |
330 | } | |
331 | ||
2bc50259 GF |
332 | struct ceph_cap *ceph_get_cap_for_mds(struct ceph_inode_info *ci, int mds) |
333 | { | |
334 | struct ceph_cap *cap; | |
335 | ||
be655596 | 336 | spin_lock(&ci->i_ceph_lock); |
2bc50259 | 337 | cap = __get_cap_for_mds(ci, mds); |
be655596 | 338 | spin_unlock(&ci->i_ceph_lock); |
2bc50259 GF |
339 | return cap; |
340 | } | |
341 | ||
a8599bd8 | 342 | /* |
33caad32 | 343 | * Return id of any MDS with a cap, preferably FILE_WR|BUFFER|EXCL, else -1. |
a8599bd8 | 344 | */ |
ca81f3f6 | 345 | static int __ceph_get_cap_mds(struct ceph_inode_info *ci) |
a8599bd8 SW |
346 | { |
347 | struct ceph_cap *cap; | |
348 | int mds = -1; | |
349 | struct rb_node *p; | |
350 | ||
33caad32 | 351 | /* prefer mds with WR|BUFFER|EXCL caps */ |
a8599bd8 SW |
352 | for (p = rb_first(&ci->i_caps); p; p = rb_next(p)) { |
353 | cap = rb_entry(p, struct ceph_cap, ci_node); | |
354 | mds = cap->mds; | |
a8599bd8 SW |
355 | if (cap->issued & (CEPH_CAP_FILE_WR | |
356 | CEPH_CAP_FILE_BUFFER | | |
357 | CEPH_CAP_FILE_EXCL)) | |
358 | break; | |
359 | } | |
360 | return mds; | |
361 | } | |
362 | ||
363 | int ceph_get_cap_mds(struct inode *inode) | |
364 | { | |
be655596 | 365 | struct ceph_inode_info *ci = ceph_inode(inode); |
a8599bd8 | 366 | int mds; |
be655596 | 367 | spin_lock(&ci->i_ceph_lock); |
ca81f3f6 | 368 | mds = __ceph_get_cap_mds(ceph_inode(inode)); |
be655596 | 369 | spin_unlock(&ci->i_ceph_lock); |
a8599bd8 SW |
370 | return mds; |
371 | } | |
372 | ||
373 | /* | |
be655596 | 374 | * Called under i_ceph_lock. |
a8599bd8 SW |
375 | */ |
376 | static void __insert_cap_node(struct ceph_inode_info *ci, | |
377 | struct ceph_cap *new) | |
378 | { | |
379 | struct rb_node **p = &ci->i_caps.rb_node; | |
380 | struct rb_node *parent = NULL; | |
381 | struct ceph_cap *cap = NULL; | |
382 | ||
383 | while (*p) { | |
384 | parent = *p; | |
385 | cap = rb_entry(parent, struct ceph_cap, ci_node); | |
386 | if (new->mds < cap->mds) | |
387 | p = &(*p)->rb_left; | |
388 | else if (new->mds > cap->mds) | |
389 | p = &(*p)->rb_right; | |
390 | else | |
391 | BUG(); | |
392 | } | |
393 | ||
394 | rb_link_node(&new->ci_node, parent, p); | |
395 | rb_insert_color(&new->ci_node, &ci->i_caps); | |
396 | } | |
397 | ||
398 | /* | |
399 | * (re)set cap hold timeouts, which control the delayed release | |
400 | * of unused caps back to the MDS. Should be called on cap use. | |
401 | */ | |
402 | static void __cap_set_timeouts(struct ceph_mds_client *mdsc, | |
403 | struct ceph_inode_info *ci) | |
404 | { | |
3d14c5d2 | 405 | struct ceph_mount_options *ma = mdsc->fsc->mount_options; |
a8599bd8 SW |
406 | |
407 | ci->i_hold_caps_min = round_jiffies(jiffies + | |
408 | ma->caps_wanted_delay_min * HZ); | |
409 | ci->i_hold_caps_max = round_jiffies(jiffies + | |
410 | ma->caps_wanted_delay_max * HZ); | |
411 | dout("__cap_set_timeouts %p min %lu max %lu\n", &ci->vfs_inode, | |
412 | ci->i_hold_caps_min - jiffies, ci->i_hold_caps_max - jiffies); | |
413 | } | |
414 | ||
415 | /* | |
416 | * (Re)queue cap at the end of the delayed cap release list. | |
417 | * | |
418 | * If I_FLUSH is set, leave the inode at the front of the list. | |
419 | * | |
be655596 | 420 | * Caller holds i_ceph_lock |
a8599bd8 SW |
421 | * -> we take mdsc->cap_delay_lock |
422 | */ | |
423 | static void __cap_delay_requeue(struct ceph_mds_client *mdsc, | |
424 | struct ceph_inode_info *ci) | |
425 | { | |
426 | __cap_set_timeouts(mdsc, ci); | |
427 | dout("__cap_delay_requeue %p flags %d at %lu\n", &ci->vfs_inode, | |
428 | ci->i_ceph_flags, ci->i_hold_caps_max); | |
429 | if (!mdsc->stopping) { | |
430 | spin_lock(&mdsc->cap_delay_lock); | |
431 | if (!list_empty(&ci->i_cap_delay_list)) { | |
432 | if (ci->i_ceph_flags & CEPH_I_FLUSH) | |
433 | goto no_change; | |
434 | list_del_init(&ci->i_cap_delay_list); | |
435 | } | |
436 | list_add_tail(&ci->i_cap_delay_list, &mdsc->cap_delay_list); | |
437 | no_change: | |
438 | spin_unlock(&mdsc->cap_delay_lock); | |
439 | } | |
440 | } | |
441 | ||
442 | /* | |
443 | * Queue an inode for immediate writeback. Mark inode with I_FLUSH, | |
444 | * indicating we should send a cap message to flush dirty metadata | |
445 | * asap, and move to the front of the delayed cap list. | |
446 | */ | |
447 | static void __cap_delay_requeue_front(struct ceph_mds_client *mdsc, | |
448 | struct ceph_inode_info *ci) | |
449 | { | |
450 | dout("__cap_delay_requeue_front %p\n", &ci->vfs_inode); | |
451 | spin_lock(&mdsc->cap_delay_lock); | |
452 | ci->i_ceph_flags |= CEPH_I_FLUSH; | |
453 | if (!list_empty(&ci->i_cap_delay_list)) | |
454 | list_del_init(&ci->i_cap_delay_list); | |
455 | list_add(&ci->i_cap_delay_list, &mdsc->cap_delay_list); | |
456 | spin_unlock(&mdsc->cap_delay_lock); | |
457 | } | |
458 | ||
459 | /* | |
460 | * Cancel delayed work on cap. | |
461 | * | |
be655596 | 462 | * Caller must hold i_ceph_lock. |
a8599bd8 SW |
463 | */ |
464 | static void __cap_delay_cancel(struct ceph_mds_client *mdsc, | |
465 | struct ceph_inode_info *ci) | |
466 | { | |
467 | dout("__cap_delay_cancel %p\n", &ci->vfs_inode); | |
468 | if (list_empty(&ci->i_cap_delay_list)) | |
469 | return; | |
470 | spin_lock(&mdsc->cap_delay_lock); | |
471 | list_del_init(&ci->i_cap_delay_list); | |
472 | spin_unlock(&mdsc->cap_delay_lock); | |
473 | } | |
474 | ||
475 | /* | |
476 | * Common issue checks for add_cap, handle_cap_grant. | |
477 | */ | |
478 | static void __check_cap_issue(struct ceph_inode_info *ci, struct ceph_cap *cap, | |
479 | unsigned issued) | |
480 | { | |
481 | unsigned had = __ceph_caps_issued(ci, NULL); | |
482 | ||
483 | /* | |
484 | * Each time we receive FILE_CACHE anew, we increment | |
485 | * i_rdcache_gen. | |
486 | */ | |
2962507c | 487 | if ((issued & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)) && |
99ccbd22 | 488 | (had & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)) == 0) { |
a8599bd8 | 489 | ci->i_rdcache_gen++; |
99ccbd22 | 490 | } |
a8599bd8 SW |
491 | |
492 | /* | |
2f276c51 | 493 | * if we are newly issued FILE_SHARED, mark dir not complete; we |
a8599bd8 SW |
494 | * don't know what happened to this directory while we didn't |
495 | * have the cap. | |
496 | */ | |
497 | if ((issued & CEPH_CAP_FILE_SHARED) && | |
498 | (had & CEPH_CAP_FILE_SHARED) == 0) { | |
499 | ci->i_shared_gen++; | |
a8673d61 YZ |
500 | if (S_ISDIR(ci->vfs_inode.i_mode)) { |
501 | dout(" marking %p NOT complete\n", &ci->vfs_inode); | |
2f276c51 | 502 | __ceph_dir_clear_complete(ci); |
a8673d61 | 503 | } |
a8599bd8 SW |
504 | } |
505 | } | |
506 | ||
507 | /* | |
508 | * Add a capability under the given MDS session. | |
509 | * | |
510 | * Caller should hold session snap_rwsem (read) and s_mutex. | |
511 | * | |
512 | * @fmode is the open file mode, if we are opening a file, otherwise | |
513 | * it is < 0. (This is so we can atomically add the cap and add an | |
514 | * open file reference to it.) | |
515 | */ | |
d9df2783 YZ |
516 | void ceph_add_cap(struct inode *inode, |
517 | struct ceph_mds_session *session, u64 cap_id, | |
518 | int fmode, unsigned issued, unsigned wanted, | |
519 | unsigned seq, unsigned mseq, u64 realmino, int flags, | |
520 | struct ceph_cap **new_cap) | |
a8599bd8 | 521 | { |
3d14c5d2 | 522 | struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc; |
a8599bd8 | 523 | struct ceph_inode_info *ci = ceph_inode(inode); |
a8599bd8 SW |
524 | struct ceph_cap *cap; |
525 | int mds = session->s_mds; | |
526 | int actual_wanted; | |
527 | ||
528 | dout("add_cap %p mds%d cap %llx %s seq %d\n", inode, | |
529 | session->s_mds, cap_id, ceph_cap_string(issued), seq); | |
530 | ||
531 | /* | |
532 | * If we are opening the file, include file mode wanted bits | |
533 | * in wanted. | |
534 | */ | |
535 | if (fmode >= 0) | |
536 | wanted |= ceph_caps_for_mode(fmode); | |
537 | ||
a8599bd8 SW |
538 | cap = __get_cap_for_mds(ci, mds); |
539 | if (!cap) { | |
d9df2783 YZ |
540 | cap = *new_cap; |
541 | *new_cap = NULL; | |
a8599bd8 SW |
542 | |
543 | cap->issued = 0; | |
544 | cap->implemented = 0; | |
545 | cap->mds = mds; | |
546 | cap->mds_wanted = 0; | |
964266cc | 547 | cap->mseq = 0; |
a8599bd8 SW |
548 | |
549 | cap->ci = ci; | |
550 | __insert_cap_node(ci, cap); | |
551 | ||
a8599bd8 SW |
552 | /* add to session cap list */ |
553 | cap->session = session; | |
554 | spin_lock(&session->s_cap_lock); | |
555 | list_add_tail(&cap->session_caps, &session->s_caps); | |
556 | session->s_nr_caps++; | |
557 | spin_unlock(&session->s_cap_lock); | |
11df2dfb | 558 | } else { |
11df2dfb YZ |
559 | /* |
560 | * auth mds of the inode changed. we received the cap export | |
561 | * message, but still haven't received the cap import message. | |
562 | * handle_cap_export() updated the new auth MDS' cap. | |
563 | * | |
564 | * "ceph_seq_cmp(seq, cap->seq) <= 0" means we are processing | |
565 | * a message that was send before the cap import message. So | |
566 | * don't remove caps. | |
567 | */ | |
568 | if (ceph_seq_cmp(seq, cap->seq) <= 0) { | |
569 | WARN_ON(cap != ci->i_auth_cap); | |
570 | WARN_ON(cap->cap_id != cap_id); | |
571 | seq = cap->seq; | |
572 | mseq = cap->mseq; | |
573 | issued |= cap->issued; | |
574 | flags |= CEPH_CAP_FLAG_AUTH; | |
575 | } | |
576 | } | |
a8599bd8 SW |
577 | |
578 | if (!ci->i_snap_realm) { | |
579 | /* | |
580 | * add this inode to the appropriate snap realm | |
581 | */ | |
582 | struct ceph_snap_realm *realm = ceph_lookup_snap_realm(mdsc, | |
583 | realmino); | |
584 | if (realm) { | |
a8599bd8 SW |
585 | spin_lock(&realm->inodes_with_caps_lock); |
586 | ci->i_snap_realm = realm; | |
587 | list_add(&ci->i_snap_realm_item, | |
588 | &realm->inodes_with_caps); | |
589 | spin_unlock(&realm->inodes_with_caps_lock); | |
590 | } else { | |
591 | pr_err("ceph_add_cap: couldn't find snap realm %llx\n", | |
592 | realmino); | |
b8cd07e7 | 593 | WARN_ON(!realm); |
a8599bd8 SW |
594 | } |
595 | } | |
596 | ||
597 | __check_cap_issue(ci, cap, issued); | |
598 | ||
599 | /* | |
600 | * If we are issued caps we don't want, or the mds' wanted | |
601 | * value appears to be off, queue a check so we'll release | |
602 | * later and/or update the mds wanted value. | |
603 | */ | |
604 | actual_wanted = __ceph_caps_wanted(ci); | |
605 | if ((wanted & ~actual_wanted) || | |
606 | (issued & ~actual_wanted & CEPH_CAP_ANY_WR)) { | |
607 | dout(" issued %s, mds wanted %s, actual %s, queueing\n", | |
608 | ceph_cap_string(issued), ceph_cap_string(wanted), | |
609 | ceph_cap_string(actual_wanted)); | |
610 | __cap_delay_requeue(mdsc, ci); | |
611 | } | |
612 | ||
b8c2f3ae YZ |
613 | if (flags & CEPH_CAP_FLAG_AUTH) { |
614 | if (ci->i_auth_cap == NULL || | |
d9ffc4f7 | 615 | ceph_seq_cmp(ci->i_auth_cap->mseq, mseq) < 0) { |
b8c2f3ae | 616 | ci->i_auth_cap = cap; |
d9ffc4f7 YZ |
617 | cap->mds_wanted = wanted; |
618 | } | |
11df2dfb YZ |
619 | } else { |
620 | WARN_ON(ci->i_auth_cap == cap); | |
8a92a119 | 621 | } |
a8599bd8 SW |
622 | |
623 | dout("add_cap inode %p (%llx.%llx) cap %p %s now %s seq %d mds%d\n", | |
624 | inode, ceph_vinop(inode), cap, ceph_cap_string(issued), | |
625 | ceph_cap_string(issued|cap->issued), seq, mds); | |
626 | cap->cap_id = cap_id; | |
627 | cap->issued = issued; | |
628 | cap->implemented |= issued; | |
d1b87809 | 629 | if (ceph_seq_cmp(mseq, cap->mseq) > 0) |
964266cc YZ |
630 | cap->mds_wanted = wanted; |
631 | else | |
632 | cap->mds_wanted |= wanted; | |
a8599bd8 SW |
633 | cap->seq = seq; |
634 | cap->issue_seq = seq; | |
635 | cap->mseq = mseq; | |
685f9a5d | 636 | cap->cap_gen = session->s_cap_gen; |
a8599bd8 SW |
637 | |
638 | if (fmode >= 0) | |
639 | __ceph_get_fmode(ci, fmode); | |
a8599bd8 SW |
640 | } |
641 | ||
642 | /* | |
643 | * Return true if cap has not timed out and belongs to the current | |
644 | * generation of the MDS session (i.e. has not gone 'stale' due to | |
645 | * us losing touch with the mds). | |
646 | */ | |
647 | static int __cap_is_valid(struct ceph_cap *cap) | |
648 | { | |
649 | unsigned long ttl; | |
cdac8303 | 650 | u32 gen; |
a8599bd8 | 651 | |
d8fb02ab | 652 | spin_lock(&cap->session->s_gen_ttl_lock); |
a8599bd8 SW |
653 | gen = cap->session->s_cap_gen; |
654 | ttl = cap->session->s_cap_ttl; | |
d8fb02ab | 655 | spin_unlock(&cap->session->s_gen_ttl_lock); |
a8599bd8 | 656 | |
685f9a5d | 657 | if (cap->cap_gen < gen || time_after_eq(jiffies, ttl)) { |
a8599bd8 SW |
658 | dout("__cap_is_valid %p cap %p issued %s " |
659 | "but STALE (gen %u vs %u)\n", &cap->ci->vfs_inode, | |
685f9a5d | 660 | cap, ceph_cap_string(cap->issued), cap->cap_gen, gen); |
a8599bd8 SW |
661 | return 0; |
662 | } | |
663 | ||
664 | return 1; | |
665 | } | |
666 | ||
667 | /* | |
668 | * Return set of valid cap bits issued to us. Note that caps time | |
669 | * out, and may be invalidated in bulk if the client session times out | |
670 | * and session->s_cap_gen is bumped. | |
671 | */ | |
672 | int __ceph_caps_issued(struct ceph_inode_info *ci, int *implemented) | |
673 | { | |
d9df2783 | 674 | int have = ci->i_snap_caps; |
a8599bd8 SW |
675 | struct ceph_cap *cap; |
676 | struct rb_node *p; | |
677 | ||
678 | if (implemented) | |
679 | *implemented = 0; | |
680 | for (p = rb_first(&ci->i_caps); p; p = rb_next(p)) { | |
681 | cap = rb_entry(p, struct ceph_cap, ci_node); | |
682 | if (!__cap_is_valid(cap)) | |
683 | continue; | |
684 | dout("__ceph_caps_issued %p cap %p issued %s\n", | |
685 | &ci->vfs_inode, cap, ceph_cap_string(cap->issued)); | |
686 | have |= cap->issued; | |
687 | if (implemented) | |
688 | *implemented |= cap->implemented; | |
689 | } | |
b1530f57 YZ |
690 | /* |
691 | * exclude caps issued by non-auth MDS, but are been revoking | |
692 | * by the auth MDS. The non-auth MDS should be revoking/exporting | |
693 | * these caps, but the message is delayed. | |
694 | */ | |
695 | if (ci->i_auth_cap) { | |
696 | cap = ci->i_auth_cap; | |
697 | have &= ~cap->implemented | cap->issued; | |
698 | } | |
a8599bd8 SW |
699 | return have; |
700 | } | |
701 | ||
702 | /* | |
703 | * Get cap bits issued by caps other than @ocap | |
704 | */ | |
705 | int __ceph_caps_issued_other(struct ceph_inode_info *ci, struct ceph_cap *ocap) | |
706 | { | |
707 | int have = ci->i_snap_caps; | |
708 | struct ceph_cap *cap; | |
709 | struct rb_node *p; | |
710 | ||
711 | for (p = rb_first(&ci->i_caps); p; p = rb_next(p)) { | |
712 | cap = rb_entry(p, struct ceph_cap, ci_node); | |
713 | if (cap == ocap) | |
714 | continue; | |
715 | if (!__cap_is_valid(cap)) | |
716 | continue; | |
717 | have |= cap->issued; | |
718 | } | |
719 | return have; | |
720 | } | |
721 | ||
722 | /* | |
723 | * Move a cap to the end of the LRU (oldest caps at list head, newest | |
724 | * at list tail). | |
725 | */ | |
726 | static void __touch_cap(struct ceph_cap *cap) | |
727 | { | |
728 | struct ceph_mds_session *s = cap->session; | |
729 | ||
a8599bd8 | 730 | spin_lock(&s->s_cap_lock); |
7c1332b8 | 731 | if (s->s_cap_iterator == NULL) { |
5dacf091 SW |
732 | dout("__touch_cap %p cap %p mds%d\n", &cap->ci->vfs_inode, cap, |
733 | s->s_mds); | |
734 | list_move_tail(&cap->session_caps, &s->s_caps); | |
735 | } else { | |
736 | dout("__touch_cap %p cap %p mds%d NOP, iterating over caps\n", | |
737 | &cap->ci->vfs_inode, cap, s->s_mds); | |
738 | } | |
a8599bd8 SW |
739 | spin_unlock(&s->s_cap_lock); |
740 | } | |
741 | ||
742 | /* | |
743 | * Check if we hold the given mask. If so, move the cap(s) to the | |
744 | * front of their respective LRUs. (This is the preferred way for | |
745 | * callers to check for caps they want.) | |
746 | */ | |
747 | int __ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask, int touch) | |
748 | { | |
749 | struct ceph_cap *cap; | |
750 | struct rb_node *p; | |
751 | int have = ci->i_snap_caps; | |
752 | ||
753 | if ((have & mask) == mask) { | |
754 | dout("__ceph_caps_issued_mask %p snap issued %s" | |
755 | " (mask %s)\n", &ci->vfs_inode, | |
756 | ceph_cap_string(have), | |
757 | ceph_cap_string(mask)); | |
758 | return 1; | |
759 | } | |
760 | ||
761 | for (p = rb_first(&ci->i_caps); p; p = rb_next(p)) { | |
762 | cap = rb_entry(p, struct ceph_cap, ci_node); | |
763 | if (!__cap_is_valid(cap)) | |
764 | continue; | |
765 | if ((cap->issued & mask) == mask) { | |
766 | dout("__ceph_caps_issued_mask %p cap %p issued %s" | |
767 | " (mask %s)\n", &ci->vfs_inode, cap, | |
768 | ceph_cap_string(cap->issued), | |
769 | ceph_cap_string(mask)); | |
770 | if (touch) | |
771 | __touch_cap(cap); | |
772 | return 1; | |
773 | } | |
774 | ||
775 | /* does a combination of caps satisfy mask? */ | |
776 | have |= cap->issued; | |
777 | if ((have & mask) == mask) { | |
778 | dout("__ceph_caps_issued_mask %p combo issued %s" | |
779 | " (mask %s)\n", &ci->vfs_inode, | |
780 | ceph_cap_string(cap->issued), | |
781 | ceph_cap_string(mask)); | |
782 | if (touch) { | |
783 | struct rb_node *q; | |
784 | ||
25985edc | 785 | /* touch this + preceding caps */ |
a8599bd8 SW |
786 | __touch_cap(cap); |
787 | for (q = rb_first(&ci->i_caps); q != p; | |
788 | q = rb_next(q)) { | |
789 | cap = rb_entry(q, struct ceph_cap, | |
790 | ci_node); | |
791 | if (!__cap_is_valid(cap)) | |
792 | continue; | |
793 | __touch_cap(cap); | |
794 | } | |
795 | } | |
796 | return 1; | |
797 | } | |
798 | } | |
799 | ||
800 | return 0; | |
801 | } | |
802 | ||
803 | /* | |
804 | * Return true if mask caps are currently being revoked by an MDS. | |
805 | */ | |
6ee6b953 YZ |
806 | int __ceph_caps_revoking_other(struct ceph_inode_info *ci, |
807 | struct ceph_cap *ocap, int mask) | |
a8599bd8 | 808 | { |
a8599bd8 SW |
809 | struct ceph_cap *cap; |
810 | struct rb_node *p; | |
a8599bd8 | 811 | |
a8599bd8 SW |
812 | for (p = rb_first(&ci->i_caps); p; p = rb_next(p)) { |
813 | cap = rb_entry(p, struct ceph_cap, ci_node); | |
9563f88c | 814 | if (cap != ocap && |
6ee6b953 YZ |
815 | (cap->implemented & ~cap->issued & mask)) |
816 | return 1; | |
a8599bd8 | 817 | } |
6ee6b953 YZ |
818 | return 0; |
819 | } | |
820 | ||
821 | int ceph_caps_revoking(struct ceph_inode_info *ci, int mask) | |
822 | { | |
823 | struct inode *inode = &ci->vfs_inode; | |
824 | int ret; | |
825 | ||
826 | spin_lock(&ci->i_ceph_lock); | |
827 | ret = __ceph_caps_revoking_other(ci, NULL, mask); | |
be655596 | 828 | spin_unlock(&ci->i_ceph_lock); |
a8599bd8 SW |
829 | dout("ceph_caps_revoking %p %s = %d\n", inode, |
830 | ceph_cap_string(mask), ret); | |
831 | return ret; | |
832 | } | |
833 | ||
834 | int __ceph_caps_used(struct ceph_inode_info *ci) | |
835 | { | |
836 | int used = 0; | |
837 | if (ci->i_pin_ref) | |
838 | used |= CEPH_CAP_PIN; | |
839 | if (ci->i_rd_ref) | |
840 | used |= CEPH_CAP_FILE_RD; | |
fdd4e158 YZ |
841 | if (ci->i_rdcache_ref || |
842 | (!S_ISDIR(ci->vfs_inode.i_mode) && /* ignore readdir cache */ | |
843 | ci->vfs_inode.i_data.nrpages)) | |
a8599bd8 SW |
844 | used |= CEPH_CAP_FILE_CACHE; |
845 | if (ci->i_wr_ref) | |
846 | used |= CEPH_CAP_FILE_WR; | |
d3d0720d | 847 | if (ci->i_wb_ref || ci->i_wrbuffer_ref) |
a8599bd8 SW |
848 | used |= CEPH_CAP_FILE_BUFFER; |
849 | return used; | |
850 | } | |
851 | ||
852 | /* | |
853 | * wanted, by virtue of open file modes | |
854 | */ | |
855 | int __ceph_caps_file_wanted(struct ceph_inode_info *ci) | |
856 | { | |
774a6a11 YZ |
857 | int i, bits = 0; |
858 | for (i = 0; i < CEPH_FILE_MODE_BITS; i++) { | |
859 | if (ci->i_nr_by_mode[i]) | |
860 | bits |= 1 << i; | |
861 | } | |
862 | if (bits == 0) | |
863 | return 0; | |
864 | return ceph_caps_for_mode(bits >> 1); | |
a8599bd8 SW |
865 | } |
866 | ||
867 | /* | |
868 | * Return caps we have registered with the MDS(s) as 'wanted'. | |
869 | */ | |
c1944fed | 870 | int __ceph_caps_mds_wanted(struct ceph_inode_info *ci, bool check) |
a8599bd8 SW |
871 | { |
872 | struct ceph_cap *cap; | |
873 | struct rb_node *p; | |
874 | int mds_wanted = 0; | |
875 | ||
876 | for (p = rb_first(&ci->i_caps); p; p = rb_next(p)) { | |
877 | cap = rb_entry(p, struct ceph_cap, ci_node); | |
c1944fed | 878 | if (check && !__cap_is_valid(cap)) |
a8599bd8 | 879 | continue; |
a2550604 YZ |
880 | if (cap == ci->i_auth_cap) |
881 | mds_wanted |= cap->mds_wanted; | |
882 | else | |
883 | mds_wanted |= (cap->mds_wanted & ~CEPH_CAP_ANY_FILE_WR); | |
a8599bd8 SW |
884 | } |
885 | return mds_wanted; | |
886 | } | |
887 | ||
888 | /* | |
be655596 | 889 | * called under i_ceph_lock |
a8599bd8 SW |
890 | */ |
891 | static int __ceph_is_any_caps(struct ceph_inode_info *ci) | |
892 | { | |
d9df2783 | 893 | return !RB_EMPTY_ROOT(&ci->i_caps); |
a8599bd8 SW |
894 | } |
895 | ||
9215aeea YZ |
896 | int ceph_is_any_caps(struct inode *inode) |
897 | { | |
898 | struct ceph_inode_info *ci = ceph_inode(inode); | |
899 | int ret; | |
900 | ||
901 | spin_lock(&ci->i_ceph_lock); | |
902 | ret = __ceph_is_any_caps(ci); | |
903 | spin_unlock(&ci->i_ceph_lock); | |
904 | ||
905 | return ret; | |
906 | } | |
907 | ||
db40cc17 YZ |
908 | static void drop_inode_snap_realm(struct ceph_inode_info *ci) |
909 | { | |
910 | struct ceph_snap_realm *realm = ci->i_snap_realm; | |
911 | spin_lock(&realm->inodes_with_caps_lock); | |
912 | list_del_init(&ci->i_snap_realm_item); | |
913 | ci->i_snap_realm_counter++; | |
914 | ci->i_snap_realm = NULL; | |
915 | spin_unlock(&realm->inodes_with_caps_lock); | |
916 | ceph_put_snap_realm(ceph_sb_to_client(ci->vfs_inode.i_sb)->mdsc, | |
917 | realm); | |
918 | } | |
919 | ||
a8599bd8 | 920 | /* |
f818a736 SW |
921 | * Remove a cap. Take steps to deal with a racing iterate_session_caps. |
922 | * | |
be655596 | 923 | * caller should hold i_ceph_lock. |
a6369741 | 924 | * caller will not hold session s_mutex if called from destroy_inode. |
a8599bd8 | 925 | */ |
a096b09a | 926 | void __ceph_remove_cap(struct ceph_cap *cap, bool queue_release) |
a8599bd8 SW |
927 | { |
928 | struct ceph_mds_session *session = cap->session; | |
929 | struct ceph_inode_info *ci = cap->ci; | |
640ef79d | 930 | struct ceph_mds_client *mdsc = |
3d14c5d2 | 931 | ceph_sb_to_client(ci->vfs_inode.i_sb)->mdsc; |
f818a736 | 932 | int removed = 0; |
a8599bd8 SW |
933 | |
934 | dout("__ceph_remove_cap %p from %p\n", cap, &ci->vfs_inode); | |
935 | ||
7c1332b8 SW |
936 | /* remove from session list */ |
937 | spin_lock(&session->s_cap_lock); | |
938 | if (session->s_cap_iterator == cap) { | |
939 | /* not yet, we are iterating over this very cap */ | |
940 | dout("__ceph_remove_cap delaying %p removal from session %p\n", | |
941 | cap, cap->session); | |
942 | } else { | |
943 | list_del_init(&cap->session_caps); | |
944 | session->s_nr_caps--; | |
945 | cap->session = NULL; | |
f818a736 | 946 | removed = 1; |
7c1332b8 | 947 | } |
f818a736 SW |
948 | /* protect backpointer with s_cap_lock: see iterate_session_caps */ |
949 | cap->ci = NULL; | |
745a8e3b YZ |
950 | |
951 | /* | |
952 | * s_cap_reconnect is protected by s_cap_lock. no one changes | |
953 | * s_cap_gen while session is in the reconnect state. | |
954 | */ | |
955 | if (queue_release && | |
956 | (!session->s_cap_reconnect || cap->cap_gen == session->s_cap_gen)) { | |
957 | cap->queue_release = 1; | |
958 | if (removed) { | |
959 | list_add_tail(&cap->session_caps, | |
960 | &session->s_cap_releases); | |
961 | session->s_num_cap_releases++; | |
962 | removed = 0; | |
963 | } | |
964 | } else { | |
965 | cap->queue_release = 0; | |
966 | } | |
967 | cap->cap_ino = ci->i_vino.ino; | |
968 | ||
7c1332b8 SW |
969 | spin_unlock(&session->s_cap_lock); |
970 | ||
f818a736 SW |
971 | /* remove from inode list */ |
972 | rb_erase(&cap->ci_node, &ci->i_caps); | |
973 | if (ci->i_auth_cap == cap) | |
974 | ci->i_auth_cap = NULL; | |
975 | ||
976 | if (removed) | |
37151668 | 977 | ceph_put_cap(mdsc, cap); |
a8599bd8 | 978 | |
db40cc17 YZ |
979 | /* when reconnect denied, we remove session caps forcibly, |
980 | * i_wr_ref can be non-zero. If there are ongoing write, | |
981 | * keep i_snap_realm. | |
982 | */ | |
983 | if (!__ceph_is_any_caps(ci) && ci->i_wr_ref == 0 && ci->i_snap_realm) | |
984 | drop_inode_snap_realm(ci); | |
985 | ||
a8599bd8 SW |
986 | if (!__ceph_is_any_real_caps(ci)) |
987 | __cap_delay_cancel(mdsc, ci); | |
988 | } | |
989 | ||
0ff8bfb3 JL |
990 | struct cap_msg_args { |
991 | struct ceph_mds_session *session; | |
992 | u64 ino, cid, follows; | |
993 | u64 flush_tid, oldest_flush_tid, size, max_size; | |
994 | u64 xattr_version; | |
995 | struct ceph_buffer *xattr_buf; | |
996 | struct timespec atime, mtime, ctime; | |
997 | int op, caps, wanted, dirty; | |
998 | u32 seq, issue_seq, mseq, time_warp_seq; | |
1e4ef0c6 | 999 | u32 flags; |
0ff8bfb3 JL |
1000 | kuid_t uid; |
1001 | kgid_t gid; | |
1002 | umode_t mode; | |
1003 | bool inline_data; | |
1004 | }; | |
1005 | ||
a8599bd8 SW |
1006 | /* |
1007 | * Build and send a cap message to the given MDS. | |
1008 | * | |
1009 | * Caller should be holding s_mutex. | |
1010 | */ | |
0ff8bfb3 | 1011 | static int send_cap_msg(struct cap_msg_args *arg) |
a8599bd8 SW |
1012 | { |
1013 | struct ceph_mds_caps *fc; | |
1014 | struct ceph_msg *msg; | |
e20d258d YZ |
1015 | void *p; |
1016 | size_t extra_len; | |
43b29673 | 1017 | struct timespec zerotime = {0}; |
a8599bd8 SW |
1018 | |
1019 | dout("send_cap_msg %s %llx %llx caps %s wanted %s dirty %s" | |
a2971c8c | 1020 | " seq %u/%u tid %llu/%llu mseq %u follows %lld size %llu/%llu" |
0ff8bfb3 JL |
1021 | " xattr_ver %llu xattr_len %d\n", ceph_cap_op_name(arg->op), |
1022 | arg->cid, arg->ino, ceph_cap_string(arg->caps), | |
1023 | ceph_cap_string(arg->wanted), ceph_cap_string(arg->dirty), | |
1024 | arg->seq, arg->issue_seq, arg->flush_tid, arg->oldest_flush_tid, | |
1025 | arg->mseq, arg->follows, arg->size, arg->max_size, | |
1026 | arg->xattr_version, | |
1027 | arg->xattr_buf ? (int)arg->xattr_buf->vec.iov_len : 0); | |
a8599bd8 | 1028 | |
a2971c8c YZ |
1029 | /* flock buffer size + inline version + inline data size + |
1030 | * osd_epoch_barrier + oldest_flush_tid */ | |
43b29673 | 1031 | extra_len = 4 + 8 + 4 + 4 + 8 + 4 + 4 + 4 + 8 + 8 + 4; |
e20d258d YZ |
1032 | msg = ceph_msg_new(CEPH_MSG_CLIENT_CAPS, sizeof(*fc) + extra_len, |
1033 | GFP_NOFS, false); | |
a79832f2 SW |
1034 | if (!msg) |
1035 | return -ENOMEM; | |
a8599bd8 | 1036 | |
43b29673 | 1037 | msg->hdr.version = cpu_to_le16(10); |
0ff8bfb3 | 1038 | msg->hdr.tid = cpu_to_le64(arg->flush_tid); |
a8599bd8 | 1039 | |
6df058c0 | 1040 | fc = msg->front.iov_base; |
a8599bd8 SW |
1041 | memset(fc, 0, sizeof(*fc)); |
1042 | ||
0ff8bfb3 JL |
1043 | fc->cap_id = cpu_to_le64(arg->cid); |
1044 | fc->op = cpu_to_le32(arg->op); | |
1045 | fc->seq = cpu_to_le32(arg->seq); | |
1046 | fc->issue_seq = cpu_to_le32(arg->issue_seq); | |
1047 | fc->migrate_seq = cpu_to_le32(arg->mseq); | |
1048 | fc->caps = cpu_to_le32(arg->caps); | |
1049 | fc->wanted = cpu_to_le32(arg->wanted); | |
1050 | fc->dirty = cpu_to_le32(arg->dirty); | |
1051 | fc->ino = cpu_to_le64(arg->ino); | |
1052 | fc->snap_follows = cpu_to_le64(arg->follows); | |
1053 | ||
1054 | fc->size = cpu_to_le64(arg->size); | |
1055 | fc->max_size = cpu_to_le64(arg->max_size); | |
1056 | ceph_encode_timespec(&fc->mtime, &arg->mtime); | |
1057 | ceph_encode_timespec(&fc->atime, &arg->atime); | |
1058 | ceph_encode_timespec(&fc->ctime, &arg->ctime); | |
1059 | fc->time_warp_seq = cpu_to_le32(arg->time_warp_seq); | |
1060 | ||
1061 | fc->uid = cpu_to_le32(from_kuid(&init_user_ns, arg->uid)); | |
1062 | fc->gid = cpu_to_le32(from_kgid(&init_user_ns, arg->gid)); | |
1063 | fc->mode = cpu_to_le32(arg->mode); | |
1064 | ||
1065 | fc->xattr_version = cpu_to_le64(arg->xattr_version); | |
1066 | if (arg->xattr_buf) { | |
1067 | msg->middle = ceph_buffer_get(arg->xattr_buf); | |
1068 | fc->xattr_len = cpu_to_le32(arg->xattr_buf->vec.iov_len); | |
1069 | msg->hdr.middle_len = cpu_to_le32(arg->xattr_buf->vec.iov_len); | |
9670079f JL |
1070 | } |
1071 | ||
e20d258d | 1072 | p = fc + 1; |
43b29673 | 1073 | /* flock buffer size (version 2) */ |
e20d258d | 1074 | ceph_encode_32(&p, 0); |
43b29673 | 1075 | /* inline version (version 4) */ |
0ff8bfb3 | 1076 | ceph_encode_64(&p, arg->inline_data ? 0 : CEPH_INLINE_NONE); |
e20d258d YZ |
1077 | /* inline data size */ |
1078 | ceph_encode_32(&p, 0); | |
43b29673 | 1079 | /* osd_epoch_barrier (version 5) */ |
a2971c8c | 1080 | ceph_encode_32(&p, 0); |
43b29673 | 1081 | /* oldest_flush_tid (version 6) */ |
0ff8bfb3 | 1082 | ceph_encode_64(&p, arg->oldest_flush_tid); |
e20d258d | 1083 | |
43b29673 JL |
1084 | /* |
1085 | * caller_uid/caller_gid (version 7) | |
1086 | * | |
1087 | * Currently, we don't properly track which caller dirtied the caps | |
1088 | * last, and force a flush of them when there is a conflict. For now, | |
1089 | * just set this to 0:0, to emulate how the MDS has worked up to now. | |
1090 | */ | |
1091 | ceph_encode_32(&p, 0); | |
1092 | ceph_encode_32(&p, 0); | |
1093 | ||
1094 | /* pool namespace (version 8) (mds always ignores this) */ | |
1095 | ceph_encode_32(&p, 0); | |
1096 | ||
1097 | /* | |
1098 | * btime and change_attr (version 9) | |
1099 | * | |
1100 | * We just zero these out for now, as the MDS ignores them unless | |
1101 | * the requisite feature flags are set (which we don't do yet). | |
1102 | */ | |
1103 | ceph_encode_timespec(p, &zerotime); | |
1104 | p += sizeof(struct ceph_timespec); | |
1105 | ceph_encode_64(&p, 0); | |
1106 | ||
1107 | /* Advisory flags (version 10) */ | |
1e4ef0c6 | 1108 | ceph_encode_32(&p, arg->flags); |
43b29673 | 1109 | |
0ff8bfb3 | 1110 | ceph_con_send(&arg->session->s_con, msg); |
a8599bd8 SW |
1111 | return 0; |
1112 | } | |
1113 | ||
1114 | /* | |
a6369741 | 1115 | * Queue cap releases when an inode is dropped from our cache. Since |
be655596 | 1116 | * inode is about to be destroyed, there is no need for i_ceph_lock. |
a8599bd8 SW |
1117 | */ |
1118 | void ceph_queue_caps_release(struct inode *inode) | |
1119 | { | |
1120 | struct ceph_inode_info *ci = ceph_inode(inode); | |
1121 | struct rb_node *p; | |
1122 | ||
a8599bd8 SW |
1123 | p = rb_first(&ci->i_caps); |
1124 | while (p) { | |
1125 | struct ceph_cap *cap = rb_entry(p, struct ceph_cap, ci_node); | |
a8599bd8 | 1126 | p = rb_next(p); |
a096b09a | 1127 | __ceph_remove_cap(cap, true); |
a8599bd8 | 1128 | } |
a8599bd8 SW |
1129 | } |
1130 | ||
1131 | /* | |
1132 | * Send a cap msg on the given inode. Update our caps state, then | |
be655596 | 1133 | * drop i_ceph_lock and send the message. |
a8599bd8 SW |
1134 | * |
1135 | * Make note of max_size reported/requested from mds, revoked caps | |
1136 | * that have now been implemented. | |
1137 | * | |
1138 | * Make half-hearted attempt ot to invalidate page cache if we are | |
1139 | * dropping RDCACHE. Note that this will leave behind locked pages | |
1140 | * that we'll then need to deal with elsewhere. | |
1141 | * | |
1142 | * Return non-zero if delayed release, or we experienced an error | |
1143 | * such that the caller should requeue + retry later. | |
1144 | * | |
be655596 | 1145 | * called with i_ceph_lock, then drops it. |
a8599bd8 SW |
1146 | * caller should hold snap_rwsem (read), s_mutex. |
1147 | */ | |
1148 | static int __send_cap(struct ceph_mds_client *mdsc, struct ceph_cap *cap, | |
1e4ef0c6 JL |
1149 | int op, bool sync, int used, int want, int retain, |
1150 | int flushing, u64 flush_tid, u64 oldest_flush_tid) | |
be655596 | 1151 | __releases(cap->ci->i_ceph_lock) |
a8599bd8 SW |
1152 | { |
1153 | struct ceph_inode_info *ci = cap->ci; | |
1154 | struct inode *inode = &ci->vfs_inode; | |
0ff8bfb3 JL |
1155 | struct cap_msg_args arg; |
1156 | int held, revoking, dropping; | |
a8599bd8 | 1157 | int wake = 0; |
a8599bd8 | 1158 | int delayed = 0; |
a8599bd8 SW |
1159 | int ret; |
1160 | ||
68c28323 SW |
1161 | held = cap->issued | cap->implemented; |
1162 | revoking = cap->implemented & ~cap->issued; | |
1163 | retain &= ~revoking; | |
1164 | dropping = cap->issued & ~retain; | |
1165 | ||
a8599bd8 SW |
1166 | dout("__send_cap %p cap %p session %p %s -> %s (revoking %s)\n", |
1167 | inode, cap, cap->session, | |
1168 | ceph_cap_string(held), ceph_cap_string(held & retain), | |
1169 | ceph_cap_string(revoking)); | |
1170 | BUG_ON((retain & CEPH_CAP_PIN) == 0); | |
1171 | ||
0ff8bfb3 | 1172 | arg.session = cap->session; |
a8599bd8 SW |
1173 | |
1174 | /* don't release wanted unless we've waited a bit. */ | |
1175 | if ((ci->i_ceph_flags & CEPH_I_NODELAY) == 0 && | |
1176 | time_before(jiffies, ci->i_hold_caps_min)) { | |
1177 | dout(" delaying issued %s -> %s, wanted %s -> %s on send\n", | |
1178 | ceph_cap_string(cap->issued), | |
1179 | ceph_cap_string(cap->issued & retain), | |
1180 | ceph_cap_string(cap->mds_wanted), | |
1181 | ceph_cap_string(want)); | |
1182 | want |= cap->mds_wanted; | |
1183 | retain |= cap->issued; | |
1184 | delayed = 1; | |
1185 | } | |
1186 | ci->i_ceph_flags &= ~(CEPH_I_NODELAY | CEPH_I_FLUSH); | |
eb65b919 YZ |
1187 | if (want & ~cap->mds_wanted) { |
1188 | /* user space may open/close single file frequently. | |
1189 | * This avoids droping mds_wanted immediately after | |
1190 | * requesting new mds_wanted. | |
1191 | */ | |
1192 | __cap_set_timeouts(mdsc, ci); | |
1193 | } | |
a8599bd8 SW |
1194 | |
1195 | cap->issued &= retain; /* drop bits we don't want */ | |
1196 | if (cap->implemented & ~cap->issued) { | |
1197 | /* | |
1198 | * Wake up any waiters on wanted -> needed transition. | |
1199 | * This is due to the weird transition from buffered | |
1200 | * to sync IO... we need to flush dirty pages _before_ | |
1201 | * allowing sync writes to avoid reordering. | |
1202 | */ | |
1203 | wake = 1; | |
1204 | } | |
1205 | cap->implemented &= cap->issued | used; | |
1206 | cap->mds_wanted = want; | |
1207 | ||
0ff8bfb3 JL |
1208 | arg.ino = ceph_vino(inode).ino; |
1209 | arg.cid = cap->cap_id; | |
1210 | arg.follows = flushing ? ci->i_head_snapc->seq : 0; | |
1211 | arg.flush_tid = flush_tid; | |
1212 | arg.oldest_flush_tid = oldest_flush_tid; | |
1213 | ||
1214 | arg.size = inode->i_size; | |
1215 | ci->i_reported_size = arg.size; | |
1216 | arg.max_size = ci->i_wanted_max_size; | |
1217 | ci->i_requested_max_size = arg.max_size; | |
a8599bd8 | 1218 | |
082afec9 | 1219 | if (flushing & CEPH_CAP_XATTR_EXCL) { |
a8599bd8 | 1220 | __ceph_build_xattrs_blob(ci); |
0ff8bfb3 JL |
1221 | arg.xattr_version = ci->i_xattrs.version; |
1222 | arg.xattr_buf = ci->i_xattrs.blob; | |
1223 | } else { | |
1224 | arg.xattr_buf = NULL; | |
a8599bd8 SW |
1225 | } |
1226 | ||
0ff8bfb3 JL |
1227 | arg.mtime = inode->i_mtime; |
1228 | arg.atime = inode->i_atime; | |
1229 | arg.ctime = inode->i_ctime; | |
1230 | ||
1231 | arg.op = op; | |
1232 | arg.caps = cap->implemented; | |
1233 | arg.wanted = want; | |
1234 | arg.dirty = flushing; | |
1235 | ||
1236 | arg.seq = cap->seq; | |
1237 | arg.issue_seq = cap->issue_seq; | |
1238 | arg.mseq = cap->mseq; | |
1239 | arg.time_warp_seq = ci->i_time_warp_seq; | |
1240 | ||
1241 | arg.uid = inode->i_uid; | |
1242 | arg.gid = inode->i_gid; | |
1243 | arg.mode = inode->i_mode; | |
1244 | ||
1245 | arg.inline_data = ci->i_inline_version != CEPH_INLINE_NONE; | |
1e4ef0c6 JL |
1246 | arg.flags = 0; |
1247 | if (sync) | |
1248 | arg.flags |= CEPH_CLIENT_CAPS_SYNC; | |
e20d258d | 1249 | |
be655596 | 1250 | spin_unlock(&ci->i_ceph_lock); |
a8599bd8 | 1251 | |
0ff8bfb3 | 1252 | ret = send_cap_msg(&arg); |
a8599bd8 SW |
1253 | if (ret < 0) { |
1254 | dout("error sending cap msg, must requeue %p\n", inode); | |
1255 | delayed = 1; | |
1256 | } | |
1257 | ||
1258 | if (wake) | |
03066f23 | 1259 | wake_up_all(&ci->i_cap_wq); |
a8599bd8 SW |
1260 | |
1261 | return delayed; | |
1262 | } | |
1263 | ||
0e294387 YZ |
1264 | static inline int __send_flush_snap(struct inode *inode, |
1265 | struct ceph_mds_session *session, | |
1266 | struct ceph_cap_snap *capsnap, | |
1267 | u32 mseq, u64 oldest_flush_tid) | |
1268 | { | |
0ff8bfb3 JL |
1269 | struct cap_msg_args arg; |
1270 | ||
1271 | arg.session = session; | |
1272 | arg.ino = ceph_vino(inode).ino; | |
1273 | arg.cid = 0; | |
1274 | arg.follows = capsnap->follows; | |
1275 | arg.flush_tid = capsnap->cap_flush.tid; | |
1276 | arg.oldest_flush_tid = oldest_flush_tid; | |
1277 | ||
1278 | arg.size = capsnap->size; | |
1279 | arg.max_size = 0; | |
1280 | arg.xattr_version = capsnap->xattr_version; | |
1281 | arg.xattr_buf = capsnap->xattr_blob; | |
1282 | ||
1283 | arg.atime = capsnap->atime; | |
1284 | arg.mtime = capsnap->mtime; | |
1285 | arg.ctime = capsnap->ctime; | |
1286 | ||
1287 | arg.op = CEPH_CAP_OP_FLUSHSNAP; | |
1288 | arg.caps = capsnap->issued; | |
1289 | arg.wanted = 0; | |
1290 | arg.dirty = capsnap->dirty; | |
1291 | ||
1292 | arg.seq = 0; | |
1293 | arg.issue_seq = 0; | |
1294 | arg.mseq = mseq; | |
1295 | arg.time_warp_seq = capsnap->time_warp_seq; | |
1296 | ||
1297 | arg.uid = capsnap->uid; | |
1298 | arg.gid = capsnap->gid; | |
1299 | arg.mode = capsnap->mode; | |
1300 | ||
1301 | arg.inline_data = capsnap->inline_data; | |
1e4ef0c6 | 1302 | arg.flags = 0; |
0ff8bfb3 JL |
1303 | |
1304 | return send_cap_msg(&arg); | |
0e294387 YZ |
1305 | } |
1306 | ||
a8599bd8 SW |
1307 | /* |
1308 | * When a snapshot is taken, clients accumulate dirty metadata on | |
1309 | * inodes with capabilities in ceph_cap_snaps to describe the file | |
1310 | * state at the time the snapshot was taken. This must be flushed | |
1311 | * asynchronously back to the MDS once sync writes complete and dirty | |
1312 | * data is written out. | |
1313 | * | |
be655596 | 1314 | * Called under i_ceph_lock. Takes s_mutex as needed. |
a8599bd8 | 1315 | */ |
ed9b430c YZ |
1316 | static void __ceph_flush_snaps(struct ceph_inode_info *ci, |
1317 | struct ceph_mds_session *session) | |
be655596 SW |
1318 | __releases(ci->i_ceph_lock) |
1319 | __acquires(ci->i_ceph_lock) | |
a8599bd8 SW |
1320 | { |
1321 | struct inode *inode = &ci->vfs_inode; | |
ed9b430c | 1322 | struct ceph_mds_client *mdsc = session->s_mdsc; |
a8599bd8 | 1323 | struct ceph_cap_snap *capsnap; |
ed9b430c YZ |
1324 | u64 oldest_flush_tid = 0; |
1325 | u64 first_tid = 1, last_tid = 0; | |
a8599bd8 | 1326 | |
ed9b430c | 1327 | dout("__flush_snaps %p session %p\n", inode, session); |
a8599bd8 | 1328 | |
a8599bd8 | 1329 | list_for_each_entry(capsnap, &ci->i_cap_snaps, ci_item) { |
a8599bd8 SW |
1330 | /* |
1331 | * we need to wait for sync writes to complete and for dirty | |
1332 | * pages to be written out. | |
1333 | */ | |
1334 | if (capsnap->dirty_pages || capsnap->writing) | |
cfc0bf66 | 1335 | break; |
a8599bd8 | 1336 | |
86056090 YZ |
1337 | /* should be removed by ceph_try_drop_cap_snap() */ |
1338 | BUG_ON(!capsnap->need_flush); | |
819ccbfa | 1339 | |
e835124c | 1340 | /* only flush each capsnap once */ |
0e294387 | 1341 | if (capsnap->cap_flush.tid > 0) { |
ed9b430c | 1342 | dout(" already flushed %p, skipping\n", capsnap); |
e835124c SW |
1343 | continue; |
1344 | } | |
1345 | ||
553adfd9 | 1346 | spin_lock(&mdsc->cap_dirty_lock); |
0e294387 YZ |
1347 | capsnap->cap_flush.tid = ++mdsc->last_cap_flush_tid; |
1348 | list_add_tail(&capsnap->cap_flush.g_list, | |
1349 | &mdsc->cap_flush_list); | |
ed9b430c YZ |
1350 | if (oldest_flush_tid == 0) |
1351 | oldest_flush_tid = __get_oldest_flush_tid(mdsc); | |
0e294387 YZ |
1352 | if (list_empty(&ci->i_flushing_item)) { |
1353 | list_add_tail(&ci->i_flushing_item, | |
1354 | &session->s_cap_flushing); | |
1355 | } | |
553adfd9 YZ |
1356 | spin_unlock(&mdsc->cap_dirty_lock); |
1357 | ||
0e294387 YZ |
1358 | list_add_tail(&capsnap->cap_flush.i_list, |
1359 | &ci->i_cap_flush_list); | |
1360 | ||
ed9b430c YZ |
1361 | if (first_tid == 1) |
1362 | first_tid = capsnap->cap_flush.tid; | |
1363 | last_tid = capsnap->cap_flush.tid; | |
1364 | } | |
1365 | ||
1366 | ci->i_ceph_flags &= ~CEPH_I_FLUSH_SNAPS; | |
1367 | ||
1368 | while (first_tid <= last_tid) { | |
1369 | struct ceph_cap *cap = ci->i_auth_cap; | |
1370 | struct ceph_cap_flush *cf; | |
1371 | int ret; | |
1372 | ||
1373 | if (!(cap && cap->session == session)) { | |
1374 | dout("__flush_snaps %p auth cap %p not mds%d, " | |
1375 | "stop\n", inode, cap, session->s_mds); | |
1376 | break; | |
1377 | } | |
1378 | ||
1379 | ret = -ENOENT; | |
1380 | list_for_each_entry(cf, &ci->i_cap_flush_list, i_list) { | |
1381 | if (cf->tid >= first_tid) { | |
1382 | ret = 0; | |
1383 | break; | |
1384 | } | |
1385 | } | |
1386 | if (ret < 0) | |
1387 | break; | |
1388 | ||
1389 | first_tid = cf->tid + 1; | |
1390 | ||
1391 | capsnap = container_of(cf, struct ceph_cap_snap, cap_flush); | |
805692d0 | 1392 | refcount_inc(&capsnap->nref); |
be655596 | 1393 | spin_unlock(&ci->i_ceph_lock); |
a8599bd8 | 1394 | |
ed9b430c YZ |
1395 | dout("__flush_snaps %p capsnap %p tid %llu %s\n", |
1396 | inode, capsnap, cf->tid, ceph_cap_string(capsnap->dirty)); | |
a8599bd8 | 1397 | |
ed9b430c YZ |
1398 | ret = __send_flush_snap(inode, session, capsnap, cap->mseq, |
1399 | oldest_flush_tid); | |
1400 | if (ret < 0) { | |
1401 | pr_err("__flush_snaps: error sending cap flushsnap, " | |
1402 | "ino (%llx.%llx) tid %llu follows %llu\n", | |
1403 | ceph_vinop(inode), cf->tid, capsnap->follows); | |
1404 | } | |
a8599bd8 | 1405 | |
ed9b430c | 1406 | ceph_put_cap_snap(capsnap); |
be655596 | 1407 | spin_lock(&ci->i_ceph_lock); |
a8599bd8 | 1408 | } |
ed9b430c | 1409 | } |
a8599bd8 | 1410 | |
ed9b430c YZ |
1411 | void ceph_flush_snaps(struct ceph_inode_info *ci, |
1412 | struct ceph_mds_session **psession) | |
1413 | { | |
1414 | struct inode *inode = &ci->vfs_inode; | |
1415 | struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc; | |
e4d2b16a | 1416 | struct ceph_mds_session *session = NULL; |
ed9b430c | 1417 | int mds; |
e4d2b16a | 1418 | |
ed9b430c | 1419 | dout("ceph_flush_snaps %p\n", inode); |
e4d2b16a YZ |
1420 | if (psession) |
1421 | session = *psession; | |
ed9b430c YZ |
1422 | retry: |
1423 | spin_lock(&ci->i_ceph_lock); | |
1424 | if (!(ci->i_ceph_flags & CEPH_I_FLUSH_SNAPS)) { | |
1425 | dout(" no capsnap needs flush, doing nothing\n"); | |
1426 | goto out; | |
1427 | } | |
1428 | if (!ci->i_auth_cap) { | |
1429 | dout(" no auth cap (migrating?), doing nothing\n"); | |
1430 | goto out; | |
1431 | } | |
a8599bd8 | 1432 | |
ed9b430c YZ |
1433 | mds = ci->i_auth_cap->session->s_mds; |
1434 | if (session && session->s_mds != mds) { | |
1435 | dout(" oops, wrong session %p mutex\n", session); | |
a8599bd8 SW |
1436 | mutex_unlock(&session->s_mutex); |
1437 | ceph_put_mds_session(session); | |
ed9b430c YZ |
1438 | session = NULL; |
1439 | } | |
1440 | if (!session) { | |
1441 | spin_unlock(&ci->i_ceph_lock); | |
1442 | mutex_lock(&mdsc->mutex); | |
1443 | session = __ceph_lookup_mds_session(mdsc, mds); | |
1444 | mutex_unlock(&mdsc->mutex); | |
1445 | if (session) { | |
1446 | dout(" inverting session/ino locks on %p\n", session); | |
1447 | mutex_lock(&session->s_mutex); | |
1448 | } | |
1449 | goto retry; | |
a8599bd8 | 1450 | } |
a8599bd8 | 1451 | |
ed9b430c YZ |
1452 | __ceph_flush_snaps(ci, session); |
1453 | out: | |
be655596 | 1454 | spin_unlock(&ci->i_ceph_lock); |
ed9b430c YZ |
1455 | |
1456 | if (psession) { | |
1457 | *psession = session; | |
1458 | } else { | |
1459 | mutex_unlock(&session->s_mutex); | |
1460 | ceph_put_mds_session(session); | |
1461 | } | |
1462 | /* we flushed them all; remove this inode from the queue */ | |
1463 | spin_lock(&mdsc->snap_flush_lock); | |
1464 | list_del_init(&ci->i_snap_flush_item); | |
1465 | spin_unlock(&mdsc->snap_flush_lock); | |
a8599bd8 SW |
1466 | } |
1467 | ||
76e3b390 | 1468 | /* |
fca65b4a SW |
1469 | * Mark caps dirty. If inode is newly dirty, return the dirty flags. |
1470 | * Caller is then responsible for calling __mark_inode_dirty with the | |
1471 | * returned flags value. | |
76e3b390 | 1472 | */ |
f66fd9f0 YZ |
1473 | int __ceph_mark_dirty_caps(struct ceph_inode_info *ci, int mask, |
1474 | struct ceph_cap_flush **pcf) | |
76e3b390 | 1475 | { |
640ef79d | 1476 | struct ceph_mds_client *mdsc = |
3d14c5d2 | 1477 | ceph_sb_to_client(ci->vfs_inode.i_sb)->mdsc; |
76e3b390 SW |
1478 | struct inode *inode = &ci->vfs_inode; |
1479 | int was = ci->i_dirty_caps; | |
1480 | int dirty = 0; | |
1481 | ||
571ade33 YZ |
1482 | if (!ci->i_auth_cap) { |
1483 | pr_warn("__mark_dirty_caps %p %llx mask %s, " | |
1484 | "but no auth cap (session was closed?)\n", | |
1485 | inode, ceph_ino(inode), ceph_cap_string(mask)); | |
1486 | return 0; | |
1487 | } | |
1488 | ||
76e3b390 SW |
1489 | dout("__mark_dirty_caps %p %s dirty %s -> %s\n", &ci->vfs_inode, |
1490 | ceph_cap_string(mask), ceph_cap_string(was), | |
1491 | ceph_cap_string(was | mask)); | |
1492 | ci->i_dirty_caps |= mask; | |
1493 | if (was == 0) { | |
f66fd9f0 YZ |
1494 | WARN_ON_ONCE(ci->i_prealloc_cap_flush); |
1495 | swap(ci->i_prealloc_cap_flush, *pcf); | |
1496 | ||
604d1b02 YZ |
1497 | if (!ci->i_head_snapc) { |
1498 | WARN_ON_ONCE(!rwsem_is_locked(&mdsc->snap_rwsem)); | |
7d8cb26d SW |
1499 | ci->i_head_snapc = ceph_get_snap_context( |
1500 | ci->i_snap_realm->cached_context); | |
604d1b02 | 1501 | } |
0685235f YZ |
1502 | dout(" inode %p now dirty snapc %p auth cap %p\n", |
1503 | &ci->vfs_inode, ci->i_head_snapc, ci->i_auth_cap); | |
76e3b390 SW |
1504 | BUG_ON(!list_empty(&ci->i_dirty_item)); |
1505 | spin_lock(&mdsc->cap_dirty_lock); | |
11df2dfb | 1506 | list_add(&ci->i_dirty_item, &mdsc->cap_dirty); |
76e3b390 SW |
1507 | spin_unlock(&mdsc->cap_dirty_lock); |
1508 | if (ci->i_flushing_caps == 0) { | |
3772d26d | 1509 | ihold(inode); |
76e3b390 SW |
1510 | dirty |= I_DIRTY_SYNC; |
1511 | } | |
f66fd9f0 YZ |
1512 | } else { |
1513 | WARN_ON_ONCE(!ci->i_prealloc_cap_flush); | |
76e3b390 SW |
1514 | } |
1515 | BUG_ON(list_empty(&ci->i_dirty_item)); | |
1516 | if (((was | ci->i_flushing_caps) & CEPH_CAP_FILE_BUFFER) && | |
1517 | (mask & CEPH_CAP_FILE_BUFFER)) | |
1518 | dirty |= I_DIRTY_DATASYNC; | |
76e3b390 | 1519 | __cap_delay_requeue(mdsc, ci); |
fca65b4a | 1520 | return dirty; |
76e3b390 SW |
1521 | } |
1522 | ||
f66fd9f0 YZ |
1523 | struct ceph_cap_flush *ceph_alloc_cap_flush(void) |
1524 | { | |
1525 | return kmem_cache_alloc(ceph_cap_flush_cachep, GFP_KERNEL); | |
1526 | } | |
1527 | ||
1528 | void ceph_free_cap_flush(struct ceph_cap_flush *cf) | |
1529 | { | |
1530 | if (cf) | |
1531 | kmem_cache_free(ceph_cap_flush_cachep, cf); | |
1532 | } | |
1533 | ||
a2971c8c YZ |
1534 | static u64 __get_oldest_flush_tid(struct ceph_mds_client *mdsc) |
1535 | { | |
e4500b5e | 1536 | if (!list_empty(&mdsc->cap_flush_list)) { |
a2971c8c | 1537 | struct ceph_cap_flush *cf = |
e4500b5e YZ |
1538 | list_first_entry(&mdsc->cap_flush_list, |
1539 | struct ceph_cap_flush, g_list); | |
a2971c8c YZ |
1540 | return cf->tid; |
1541 | } | |
1542 | return 0; | |
1543 | } | |
1544 | ||
c8799fc4 YZ |
1545 | /* |
1546 | * Remove cap_flush from the mdsc's or inode's flushing cap list. | |
1547 | * Return true if caller needs to wake up flush waiters. | |
1548 | */ | |
1549 | static bool __finish_cap_flush(struct ceph_mds_client *mdsc, | |
1550 | struct ceph_inode_info *ci, | |
1551 | struct ceph_cap_flush *cf) | |
1552 | { | |
1553 | struct ceph_cap_flush *prev; | |
1554 | bool wake = cf->wake; | |
1555 | if (mdsc) { | |
1556 | /* are there older pending cap flushes? */ | |
1557 | if (wake && cf->g_list.prev != &mdsc->cap_flush_list) { | |
1558 | prev = list_prev_entry(cf, g_list); | |
1559 | prev->wake = true; | |
1560 | wake = false; | |
1561 | } | |
1562 | list_del(&cf->g_list); | |
1563 | } else if (ci) { | |
1564 | if (wake && cf->i_list.prev != &ci->i_cap_flush_list) { | |
1565 | prev = list_prev_entry(cf, i_list); | |
1566 | prev->wake = true; | |
1567 | wake = false; | |
1568 | } | |
1569 | list_del(&cf->i_list); | |
1570 | } else { | |
1571 | BUG_ON(1); | |
1572 | } | |
1573 | return wake; | |
1574 | } | |
1575 | ||
a8599bd8 SW |
1576 | /* |
1577 | * Add dirty inode to the flushing list. Assigned a seq number so we | |
1578 | * can wait for caps to flush without starving. | |
cdc35f96 | 1579 | * |
be655596 | 1580 | * Called under i_ceph_lock. |
a8599bd8 | 1581 | */ |
cdc35f96 | 1582 | static int __mark_caps_flushing(struct inode *inode, |
c8799fc4 | 1583 | struct ceph_mds_session *session, bool wake, |
a2971c8c | 1584 | u64 *flush_tid, u64 *oldest_flush_tid) |
a8599bd8 | 1585 | { |
3d14c5d2 | 1586 | struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc; |
a8599bd8 | 1587 | struct ceph_inode_info *ci = ceph_inode(inode); |
f66fd9f0 | 1588 | struct ceph_cap_flush *cf = NULL; |
cdc35f96 | 1589 | int flushing; |
50b885b9 | 1590 | |
cdc35f96 | 1591 | BUG_ON(ci->i_dirty_caps == 0); |
a8599bd8 | 1592 | BUG_ON(list_empty(&ci->i_dirty_item)); |
f66fd9f0 | 1593 | BUG_ON(!ci->i_prealloc_cap_flush); |
cdc35f96 SW |
1594 | |
1595 | flushing = ci->i_dirty_caps; | |
1596 | dout("__mark_caps_flushing flushing %s, flushing_caps %s -> %s\n", | |
1597 | ceph_cap_string(flushing), | |
1598 | ceph_cap_string(ci->i_flushing_caps), | |
1599 | ceph_cap_string(ci->i_flushing_caps | flushing)); | |
1600 | ci->i_flushing_caps |= flushing; | |
1601 | ci->i_dirty_caps = 0; | |
afcdaea3 | 1602 | dout(" inode %p now !dirty\n", inode); |
cdc35f96 | 1603 | |
f66fd9f0 | 1604 | swap(cf, ci->i_prealloc_cap_flush); |
553adfd9 | 1605 | cf->caps = flushing; |
c8799fc4 | 1606 | cf->wake = wake; |
553adfd9 | 1607 | |
a8599bd8 | 1608 | spin_lock(&mdsc->cap_dirty_lock); |
afcdaea3 SW |
1609 | list_del_init(&ci->i_dirty_item); |
1610 | ||
553adfd9 | 1611 | cf->tid = ++mdsc->last_cap_flush_tid; |
e4500b5e | 1612 | list_add_tail(&cf->g_list, &mdsc->cap_flush_list); |
a2971c8c | 1613 | *oldest_flush_tid = __get_oldest_flush_tid(mdsc); |
553adfd9 | 1614 | |
a8599bd8 SW |
1615 | if (list_empty(&ci->i_flushing_item)) { |
1616 | list_add_tail(&ci->i_flushing_item, &session->s_cap_flushing); | |
1617 | mdsc->num_cap_flushing++; | |
a8599bd8 SW |
1618 | } |
1619 | spin_unlock(&mdsc->cap_dirty_lock); | |
cdc35f96 | 1620 | |
e4500b5e | 1621 | list_add_tail(&cf->i_list, &ci->i_cap_flush_list); |
553adfd9 YZ |
1622 | |
1623 | *flush_tid = cf->tid; | |
cdc35f96 | 1624 | return flushing; |
a8599bd8 SW |
1625 | } |
1626 | ||
5ecad6fd SW |
1627 | /* |
1628 | * try to invalidate mapping pages without blocking. | |
1629 | */ | |
5ecad6fd SW |
1630 | static int try_nonblocking_invalidate(struct inode *inode) |
1631 | { | |
1632 | struct ceph_inode_info *ci = ceph_inode(inode); | |
1633 | u32 invalidating_gen = ci->i_rdcache_gen; | |
1634 | ||
be655596 | 1635 | spin_unlock(&ci->i_ceph_lock); |
5ecad6fd | 1636 | invalidate_mapping_pages(&inode->i_data, 0, -1); |
be655596 | 1637 | spin_lock(&ci->i_ceph_lock); |
5ecad6fd | 1638 | |
18a38193 | 1639 | if (inode->i_data.nrpages == 0 && |
5ecad6fd SW |
1640 | invalidating_gen == ci->i_rdcache_gen) { |
1641 | /* success. */ | |
1642 | dout("try_nonblocking_invalidate %p success\n", inode); | |
cd045cb4 SW |
1643 | /* save any racing async invalidate some trouble */ |
1644 | ci->i_rdcache_revoking = ci->i_rdcache_gen - 1; | |
5ecad6fd SW |
1645 | return 0; |
1646 | } | |
1647 | dout("try_nonblocking_invalidate %p failed\n", inode); | |
1648 | return -1; | |
1649 | } | |
1650 | ||
a8599bd8 SW |
1651 | /* |
1652 | * Swiss army knife function to examine currently used and wanted | |
1653 | * versus held caps. Release, flush, ack revoked caps to mds as | |
1654 | * appropriate. | |
1655 | * | |
1656 | * CHECK_CAPS_NODELAY - caller is delayed work and we should not delay | |
1657 | * cap release further. | |
1658 | * CHECK_CAPS_AUTHONLY - we should only check the auth cap | |
1659 | * CHECK_CAPS_FLUSH - we should flush any dirty caps immediately, without | |
1660 | * further delay. | |
1661 | */ | |
1662 | void ceph_check_caps(struct ceph_inode_info *ci, int flags, | |
1663 | struct ceph_mds_session *session) | |
1664 | { | |
3d14c5d2 YS |
1665 | struct ceph_fs_client *fsc = ceph_inode_to_client(&ci->vfs_inode); |
1666 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
a8599bd8 SW |
1667 | struct inode *inode = &ci->vfs_inode; |
1668 | struct ceph_cap *cap; | |
a2971c8c | 1669 | u64 flush_tid, oldest_flush_tid; |
395c312b | 1670 | int file_wanted, used, cap_used; |
a8599bd8 | 1671 | int took_snap_rwsem = 0; /* true if mdsc->snap_rwsem held */ |
cbd03635 | 1672 | int issued, implemented, want, retain, revoking, flushing = 0; |
a8599bd8 SW |
1673 | int mds = -1; /* keep track of how far we've gone through i_caps list |
1674 | to avoid an infinite loop on retry */ | |
1675 | struct rb_node *p; | |
3609404f YZ |
1676 | int delayed = 0, sent = 0, num; |
1677 | bool is_delayed = flags & CHECK_CAPS_NODELAY; | |
1678 | bool queue_invalidate = false; | |
1679 | bool force_requeue = false; | |
1680 | bool tried_invalidate = false; | |
a8599bd8 SW |
1681 | |
1682 | /* if we are unmounting, flush any unused caps immediately. */ | |
1683 | if (mdsc->stopping) | |
1684 | is_delayed = 1; | |
1685 | ||
be655596 | 1686 | spin_lock(&ci->i_ceph_lock); |
a8599bd8 SW |
1687 | |
1688 | if (ci->i_ceph_flags & CEPH_I_FLUSH) | |
1689 | flags |= CHECK_CAPS_FLUSH; | |
1690 | ||
a8599bd8 SW |
1691 | goto retry_locked; |
1692 | retry: | |
be655596 | 1693 | spin_lock(&ci->i_ceph_lock); |
a8599bd8 SW |
1694 | retry_locked: |
1695 | file_wanted = __ceph_caps_file_wanted(ci); | |
1696 | used = __ceph_caps_used(ci); | |
cbd03635 SW |
1697 | issued = __ceph_caps_issued(ci, &implemented); |
1698 | revoking = implemented & ~issued; | |
a8599bd8 | 1699 | |
41445999 YZ |
1700 | want = file_wanted; |
1701 | retain = file_wanted | used | CEPH_CAP_PIN; | |
a8599bd8 | 1702 | if (!mdsc->stopping && inode->i_nlink > 0) { |
41445999 | 1703 | if (file_wanted) { |
a8599bd8 | 1704 | retain |= CEPH_CAP_ANY; /* be greedy */ |
32ec4397 YZ |
1705 | } else if (S_ISDIR(inode->i_mode) && |
1706 | (issued & CEPH_CAP_FILE_SHARED) && | |
1707 | __ceph_dir_is_complete(ci)) { | |
1708 | /* | |
1709 | * If a directory is complete, we want to keep | |
1710 | * the exclusive cap. So that MDS does not end up | |
1711 | * revoking the shared cap on every create/unlink | |
1712 | * operation. | |
1713 | */ | |
1714 | want = CEPH_CAP_ANY_SHARED | CEPH_CAP_FILE_EXCL; | |
1715 | retain |= want; | |
a8599bd8 | 1716 | } else { |
32ec4397 | 1717 | |
a8599bd8 SW |
1718 | retain |= CEPH_CAP_ANY_SHARED; |
1719 | /* | |
1720 | * keep RD only if we didn't have the file open RW, | |
1721 | * because then the mds would revoke it anyway to | |
1722 | * journal max_size=0. | |
1723 | */ | |
1724 | if (ci->i_max_size == 0) | |
1725 | retain |= CEPH_CAP_ANY_RD; | |
1726 | } | |
1727 | } | |
1728 | ||
1729 | dout("check_caps %p file_want %s used %s dirty %s flushing %s" | |
cbd03635 | 1730 | " issued %s revoking %s retain %s %s%s%s\n", inode, |
a8599bd8 SW |
1731 | ceph_cap_string(file_wanted), |
1732 | ceph_cap_string(used), ceph_cap_string(ci->i_dirty_caps), | |
1733 | ceph_cap_string(ci->i_flushing_caps), | |
cbd03635 | 1734 | ceph_cap_string(issued), ceph_cap_string(revoking), |
a8599bd8 SW |
1735 | ceph_cap_string(retain), |
1736 | (flags & CHECK_CAPS_AUTHONLY) ? " AUTHONLY" : "", | |
1737 | (flags & CHECK_CAPS_NODELAY) ? " NODELAY" : "", | |
1738 | (flags & CHECK_CAPS_FLUSH) ? " FLUSH" : ""); | |
1739 | ||
1740 | /* | |
1741 | * If we no longer need to hold onto old our caps, and we may | |
1742 | * have cached pages, but don't want them, then try to invalidate. | |
1743 | * If we fail, it's because pages are locked.... try again later. | |
1744 | */ | |
1745 | if ((!is_delayed || mdsc->stopping) && | |
fdd4e158 | 1746 | !S_ISDIR(inode->i_mode) && /* ignore readdir cache */ |
9abd4db7 | 1747 | !(ci->i_wb_ref || ci->i_wrbuffer_ref) && /* no dirty pages... */ |
fdd4e158 | 1748 | inode->i_data.nrpages && /* have cached pages */ |
5e804ac4 YZ |
1749 | (revoking & (CEPH_CAP_FILE_CACHE| |
1750 | CEPH_CAP_FILE_LAZYIO)) && /* or revoking cache */ | |
a8599bd8 | 1751 | !tried_invalidate) { |
a8599bd8 | 1752 | dout("check_caps trying to invalidate on %p\n", inode); |
5ecad6fd | 1753 | if (try_nonblocking_invalidate(inode) < 0) { |
2962507c SW |
1754 | if (revoking & (CEPH_CAP_FILE_CACHE| |
1755 | CEPH_CAP_FILE_LAZYIO)) { | |
5ecad6fd | 1756 | dout("check_caps queuing invalidate\n"); |
3609404f | 1757 | queue_invalidate = true; |
5ecad6fd SW |
1758 | ci->i_rdcache_revoking = ci->i_rdcache_gen; |
1759 | } else { | |
1760 | dout("check_caps failed to invalidate pages\n"); | |
1761 | /* we failed to invalidate pages. check these | |
1762 | caps again later. */ | |
3609404f | 1763 | force_requeue = true; |
5ecad6fd SW |
1764 | __cap_set_timeouts(mdsc, ci); |
1765 | } | |
a8599bd8 | 1766 | } |
3609404f | 1767 | tried_invalidate = true; |
a8599bd8 SW |
1768 | goto retry_locked; |
1769 | } | |
1770 | ||
1771 | num = 0; | |
1772 | for (p = rb_first(&ci->i_caps); p; p = rb_next(p)) { | |
1773 | cap = rb_entry(p, struct ceph_cap, ci_node); | |
1774 | num++; | |
1775 | ||
1776 | /* avoid looping forever */ | |
1777 | if (mds >= cap->mds || | |
1778 | ((flags & CHECK_CAPS_AUTHONLY) && cap != ci->i_auth_cap)) | |
1779 | continue; | |
1780 | ||
1781 | /* NOTE: no side-effects allowed, until we take s_mutex */ | |
1782 | ||
395c312b YZ |
1783 | cap_used = used; |
1784 | if (ci->i_auth_cap && cap != ci->i_auth_cap) | |
1785 | cap_used &= ~ci->i_auth_cap->issued; | |
1786 | ||
a8599bd8 | 1787 | revoking = cap->implemented & ~cap->issued; |
395c312b | 1788 | dout(" mds%d cap %p used %s issued %s implemented %s revoking %s\n", |
9abd4db7 YZ |
1789 | cap->mds, cap, ceph_cap_string(cap_used), |
1790 | ceph_cap_string(cap->issued), | |
088b3f5e SW |
1791 | ceph_cap_string(cap->implemented), |
1792 | ceph_cap_string(revoking)); | |
a8599bd8 SW |
1793 | |
1794 | if (cap == ci->i_auth_cap && | |
1795 | (cap->issued & CEPH_CAP_FILE_WR)) { | |
1796 | /* request larger max_size from MDS? */ | |
1797 | if (ci->i_wanted_max_size > ci->i_max_size && | |
1798 | ci->i_wanted_max_size > ci->i_requested_max_size) { | |
1799 | dout("requesting new max_size\n"); | |
1800 | goto ack; | |
1801 | } | |
1802 | ||
1803 | /* approaching file_max? */ | |
1804 | if ((inode->i_size << 1) >= ci->i_max_size && | |
1805 | (ci->i_reported_size << 1) < ci->i_max_size) { | |
1806 | dout("i_size approaching max_size\n"); | |
1807 | goto ack; | |
1808 | } | |
1809 | } | |
1810 | /* flush anything dirty? */ | |
7bc00fdd YZ |
1811 | if (cap == ci->i_auth_cap) { |
1812 | if ((flags & CHECK_CAPS_FLUSH) && ci->i_dirty_caps) { | |
1813 | dout("flushing dirty caps\n"); | |
1814 | goto ack; | |
1815 | } | |
1816 | if (ci->i_ceph_flags & CEPH_I_FLUSH_SNAPS) { | |
1817 | dout("flushing snap caps\n"); | |
1818 | goto ack; | |
1819 | } | |
a8599bd8 SW |
1820 | } |
1821 | ||
1822 | /* completed revocation? going down and there are no caps? */ | |
395c312b | 1823 | if (revoking && (revoking & cap_used) == 0) { |
a8599bd8 SW |
1824 | dout("completed revocation of %s\n", |
1825 | ceph_cap_string(cap->implemented & ~cap->issued)); | |
1826 | goto ack; | |
1827 | } | |
1828 | ||
1829 | /* want more caps from mds? */ | |
1830 | if (want & ~(cap->mds_wanted | cap->issued)) | |
1831 | goto ack; | |
1832 | ||
1833 | /* things we might delay */ | |
1834 | if ((cap->issued & ~retain) == 0 && | |
1835 | cap->mds_wanted == want) | |
1836 | continue; /* nope, all good */ | |
1837 | ||
1838 | if (is_delayed) | |
1839 | goto ack; | |
1840 | ||
1841 | /* delay? */ | |
1842 | if ((ci->i_ceph_flags & CEPH_I_NODELAY) == 0 && | |
1843 | time_before(jiffies, ci->i_hold_caps_max)) { | |
1844 | dout(" delaying issued %s -> %s, wanted %s -> %s\n", | |
1845 | ceph_cap_string(cap->issued), | |
1846 | ceph_cap_string(cap->issued & retain), | |
1847 | ceph_cap_string(cap->mds_wanted), | |
1848 | ceph_cap_string(want)); | |
1849 | delayed++; | |
1850 | continue; | |
1851 | } | |
1852 | ||
1853 | ack: | |
e9964c10 SW |
1854 | if (ci->i_ceph_flags & CEPH_I_NOFLUSH) { |
1855 | dout(" skipping %p I_NOFLUSH set\n", inode); | |
1856 | continue; | |
1857 | } | |
1858 | ||
a8599bd8 SW |
1859 | if (session && session != cap->session) { |
1860 | dout("oops, wrong session %p mutex\n", session); | |
1861 | mutex_unlock(&session->s_mutex); | |
1862 | session = NULL; | |
1863 | } | |
1864 | if (!session) { | |
1865 | session = cap->session; | |
1866 | if (mutex_trylock(&session->s_mutex) == 0) { | |
1867 | dout("inverting session/ino locks on %p\n", | |
1868 | session); | |
be655596 | 1869 | spin_unlock(&ci->i_ceph_lock); |
a8599bd8 SW |
1870 | if (took_snap_rwsem) { |
1871 | up_read(&mdsc->snap_rwsem); | |
1872 | took_snap_rwsem = 0; | |
1873 | } | |
1874 | mutex_lock(&session->s_mutex); | |
1875 | goto retry; | |
1876 | } | |
1877 | } | |
7bc00fdd YZ |
1878 | |
1879 | /* kick flushing and flush snaps before sending normal | |
1880 | * cap message */ | |
1881 | if (cap == ci->i_auth_cap && | |
1882 | (ci->i_ceph_flags & | |
1883 | (CEPH_I_KICK_FLUSH | CEPH_I_FLUSH_SNAPS))) { | |
1884 | if (ci->i_ceph_flags & CEPH_I_KICK_FLUSH) { | |
1885 | spin_lock(&mdsc->cap_dirty_lock); | |
1886 | oldest_flush_tid = __get_oldest_flush_tid(mdsc); | |
1887 | spin_unlock(&mdsc->cap_dirty_lock); | |
1888 | __kick_flushing_caps(mdsc, session, ci, | |
1889 | oldest_flush_tid); | |
1890 | ci->i_ceph_flags &= ~CEPH_I_KICK_FLUSH; | |
1891 | } | |
ed9b430c YZ |
1892 | if (ci->i_ceph_flags & CEPH_I_FLUSH_SNAPS) |
1893 | __ceph_flush_snaps(ci, session); | |
1894 | ||
7bc00fdd YZ |
1895 | goto retry_locked; |
1896 | } | |
1897 | ||
a8599bd8 SW |
1898 | /* take snap_rwsem after session mutex */ |
1899 | if (!took_snap_rwsem) { | |
1900 | if (down_read_trylock(&mdsc->snap_rwsem) == 0) { | |
1901 | dout("inverting snap/in locks on %p\n", | |
1902 | inode); | |
be655596 | 1903 | spin_unlock(&ci->i_ceph_lock); |
a8599bd8 SW |
1904 | down_read(&mdsc->snap_rwsem); |
1905 | took_snap_rwsem = 1; | |
1906 | goto retry; | |
1907 | } | |
1908 | took_snap_rwsem = 1; | |
1909 | } | |
1910 | ||
553adfd9 | 1911 | if (cap == ci->i_auth_cap && ci->i_dirty_caps) { |
c8799fc4 | 1912 | flushing = __mark_caps_flushing(inode, session, false, |
a2971c8c YZ |
1913 | &flush_tid, |
1914 | &oldest_flush_tid); | |
553adfd9 | 1915 | } else { |
24be0c48 | 1916 | flushing = 0; |
553adfd9 | 1917 | flush_tid = 0; |
a2971c8c YZ |
1918 | spin_lock(&mdsc->cap_dirty_lock); |
1919 | oldest_flush_tid = __get_oldest_flush_tid(mdsc); | |
1920 | spin_unlock(&mdsc->cap_dirty_lock); | |
553adfd9 | 1921 | } |
a8599bd8 SW |
1922 | |
1923 | mds = cap->mds; /* remember mds, so we don't repeat */ | |
1924 | sent++; | |
1925 | ||
be655596 | 1926 | /* __send_cap drops i_ceph_lock */ |
1e4ef0c6 JL |
1927 | delayed += __send_cap(mdsc, cap, CEPH_CAP_OP_UPDATE, false, |
1928 | cap_used, want, retain, flushing, | |
1929 | flush_tid, oldest_flush_tid); | |
be655596 | 1930 | goto retry; /* retake i_ceph_lock and restart our cap scan. */ |
a8599bd8 SW |
1931 | } |
1932 | ||
1933 | /* | |
1934 | * Reschedule delayed caps release if we delayed anything, | |
1935 | * otherwise cancel. | |
1936 | */ | |
1937 | if (delayed && is_delayed) | |
3609404f | 1938 | force_requeue = true; /* __send_cap delayed release; requeue */ |
a8599bd8 SW |
1939 | if (!delayed && !is_delayed) |
1940 | __cap_delay_cancel(mdsc, ci); | |
1941 | else if (!is_delayed || force_requeue) | |
1942 | __cap_delay_requeue(mdsc, ci); | |
1943 | ||
be655596 | 1944 | spin_unlock(&ci->i_ceph_lock); |
a8599bd8 | 1945 | |
cbd03635 | 1946 | if (queue_invalidate) |
3c6f6b79 | 1947 | ceph_queue_invalidate(inode); |
cbd03635 | 1948 | |
cdc2ce05 | 1949 | if (session) |
a8599bd8 SW |
1950 | mutex_unlock(&session->s_mutex); |
1951 | if (took_snap_rwsem) | |
1952 | up_read(&mdsc->snap_rwsem); | |
1953 | } | |
1954 | ||
a8599bd8 SW |
1955 | /* |
1956 | * Try to flush dirty caps back to the auth mds. | |
1957 | */ | |
553adfd9 | 1958 | static int try_flush_caps(struct inode *inode, u64 *ptid) |
a8599bd8 | 1959 | { |
3d14c5d2 | 1960 | struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc; |
a8599bd8 | 1961 | struct ceph_inode_info *ci = ceph_inode(inode); |
4fe59789 | 1962 | struct ceph_mds_session *session = NULL; |
89b52fe1 | 1963 | int flushing = 0; |
a2971c8c | 1964 | u64 flush_tid = 0, oldest_flush_tid = 0; |
a8599bd8 SW |
1965 | |
1966 | retry: | |
be655596 | 1967 | spin_lock(&ci->i_ceph_lock); |
e9964c10 SW |
1968 | if (ci->i_ceph_flags & CEPH_I_NOFLUSH) { |
1969 | dout("try_flush_caps skipping %p I_NOFLUSH set\n", inode); | |
1970 | goto out; | |
1971 | } | |
a8599bd8 SW |
1972 | if (ci->i_dirty_caps && ci->i_auth_cap) { |
1973 | struct ceph_cap *cap = ci->i_auth_cap; | |
1974 | int used = __ceph_caps_used(ci); | |
1975 | int want = __ceph_caps_wanted(ci); | |
1976 | int delayed; | |
1977 | ||
4fe59789 | 1978 | if (!session || session != cap->session) { |
be655596 | 1979 | spin_unlock(&ci->i_ceph_lock); |
4fe59789 YZ |
1980 | if (session) |
1981 | mutex_unlock(&session->s_mutex); | |
a8599bd8 SW |
1982 | session = cap->session; |
1983 | mutex_lock(&session->s_mutex); | |
1984 | goto retry; | |
1985 | } | |
a8599bd8 SW |
1986 | if (cap->session->s_state < CEPH_MDS_SESSION_OPEN) |
1987 | goto out; | |
1988 | ||
c8799fc4 YZ |
1989 | flushing = __mark_caps_flushing(inode, session, true, |
1990 | &flush_tid, &oldest_flush_tid); | |
a8599bd8 | 1991 | |
be655596 | 1992 | /* __send_cap drops i_ceph_lock */ |
1e4ef0c6 JL |
1993 | delayed = __send_cap(mdsc, cap, CEPH_CAP_OP_FLUSH, true, |
1994 | used, want, (cap->issued | cap->implemented), | |
1995 | flushing, flush_tid, oldest_flush_tid); | |
a8599bd8 | 1996 | |
553adfd9 YZ |
1997 | if (delayed) { |
1998 | spin_lock(&ci->i_ceph_lock); | |
89b52fe1 | 1999 | __cap_delay_requeue(mdsc, ci); |
553adfd9 YZ |
2000 | spin_unlock(&ci->i_ceph_lock); |
2001 | } | |
2002 | } else { | |
e4500b5e | 2003 | if (!list_empty(&ci->i_cap_flush_list)) { |
553adfd9 | 2004 | struct ceph_cap_flush *cf = |
e4500b5e | 2005 | list_last_entry(&ci->i_cap_flush_list, |
c8799fc4 YZ |
2006 | struct ceph_cap_flush, i_list); |
2007 | cf->wake = true; | |
553adfd9 YZ |
2008 | flush_tid = cf->tid; |
2009 | } | |
2010 | flushing = ci->i_flushing_caps; | |
2011 | spin_unlock(&ci->i_ceph_lock); | |
a8599bd8 SW |
2012 | } |
2013 | out: | |
4fe59789 | 2014 | if (session) |
a8599bd8 | 2015 | mutex_unlock(&session->s_mutex); |
553adfd9 YZ |
2016 | |
2017 | *ptid = flush_tid; | |
a8599bd8 SW |
2018 | return flushing; |
2019 | } | |
2020 | ||
2021 | /* | |
2022 | * Return true if we've flushed caps through the given flush_tid. | |
2023 | */ | |
553adfd9 | 2024 | static int caps_are_flushed(struct inode *inode, u64 flush_tid) |
a8599bd8 SW |
2025 | { |
2026 | struct ceph_inode_info *ci = ceph_inode(inode); | |
553adfd9 | 2027 | int ret = 1; |
a8599bd8 | 2028 | |
be655596 | 2029 | spin_lock(&ci->i_ceph_lock); |
e4500b5e YZ |
2030 | if (!list_empty(&ci->i_cap_flush_list)) { |
2031 | struct ceph_cap_flush * cf = | |
2032 | list_first_entry(&ci->i_cap_flush_list, | |
2033 | struct ceph_cap_flush, i_list); | |
553adfd9 | 2034 | if (cf->tid <= flush_tid) |
a8599bd8 | 2035 | ret = 0; |
89b52fe1 | 2036 | } |
be655596 | 2037 | spin_unlock(&ci->i_ceph_lock); |
a8599bd8 SW |
2038 | return ret; |
2039 | } | |
2040 | ||
da819c81 | 2041 | /* |
68cd5b4b | 2042 | * wait for any unsafe requests to complete. |
da819c81 | 2043 | */ |
68cd5b4b | 2044 | static int unsafe_request_wait(struct inode *inode) |
da819c81 YZ |
2045 | { |
2046 | struct ceph_inode_info *ci = ceph_inode(inode); | |
68cd5b4b YZ |
2047 | struct ceph_mds_request *req1 = NULL, *req2 = NULL; |
2048 | int ret, err = 0; | |
da819c81 YZ |
2049 | |
2050 | spin_lock(&ci->i_unsafe_lock); | |
68cd5b4b YZ |
2051 | if (S_ISDIR(inode->i_mode) && !list_empty(&ci->i_unsafe_dirops)) { |
2052 | req1 = list_last_entry(&ci->i_unsafe_dirops, | |
2053 | struct ceph_mds_request, | |
2054 | r_unsafe_dir_item); | |
2055 | ceph_mdsc_get_request(req1); | |
2056 | } | |
2057 | if (!list_empty(&ci->i_unsafe_iops)) { | |
2058 | req2 = list_last_entry(&ci->i_unsafe_iops, | |
2059 | struct ceph_mds_request, | |
2060 | r_unsafe_target_item); | |
2061 | ceph_mdsc_get_request(req2); | |
2062 | } | |
2063 | spin_unlock(&ci->i_unsafe_lock); | |
da819c81 | 2064 | |
4945a084 | 2065 | dout("unsafe_request_wait %p wait on tid %llu %llu\n", |
68cd5b4b YZ |
2066 | inode, req1 ? req1->r_tid : 0ULL, req2 ? req2->r_tid : 0ULL); |
2067 | if (req1) { | |
2068 | ret = !wait_for_completion_timeout(&req1->r_safe_completion, | |
2069 | ceph_timeout_jiffies(req1->r_timeout)); | |
da819c81 | 2070 | if (ret) |
68cd5b4b YZ |
2071 | err = -EIO; |
2072 | ceph_mdsc_put_request(req1); | |
2073 | } | |
2074 | if (req2) { | |
2075 | ret = !wait_for_completion_timeout(&req2->r_safe_completion, | |
2076 | ceph_timeout_jiffies(req2->r_timeout)); | |
2077 | if (ret) | |
2078 | err = -EIO; | |
2079 | ceph_mdsc_put_request(req2); | |
2080 | } | |
2081 | return err; | |
da819c81 YZ |
2082 | } |
2083 | ||
02c24a82 | 2084 | int ceph_fsync(struct file *file, loff_t start, loff_t end, int datasync) |
a8599bd8 | 2085 | { |
7ea80859 | 2086 | struct inode *inode = file->f_mapping->host; |
a8599bd8 | 2087 | struct ceph_inode_info *ci = ceph_inode(inode); |
553adfd9 | 2088 | u64 flush_tid; |
a8599bd8 SW |
2089 | int ret; |
2090 | int dirty; | |
2091 | ||
2092 | dout("fsync %p%s\n", inode, datasync ? " datasync" : ""); | |
9a5530c6 | 2093 | |
02c24a82 | 2094 | ret = filemap_write_and_wait_range(inode->i_mapping, start, end); |
a8599bd8 | 2095 | if (ret < 0) |
da819c81 YZ |
2096 | goto out; |
2097 | ||
2098 | if (datasync) | |
2099 | goto out; | |
2100 | ||
5955102c | 2101 | inode_lock(inode); |
a8599bd8 | 2102 | |
553adfd9 | 2103 | dirty = try_flush_caps(inode, &flush_tid); |
a8599bd8 SW |
2104 | dout("fsync dirty caps are %s\n", ceph_cap_string(dirty)); |
2105 | ||
68cd5b4b | 2106 | ret = unsafe_request_wait(inode); |
da819c81 | 2107 | |
a8599bd8 SW |
2108 | /* |
2109 | * only wait on non-file metadata writeback (the mds | |
2110 | * can recover size and mtime, so we don't need to | |
2111 | * wait for that) | |
2112 | */ | |
da819c81 | 2113 | if (!ret && (dirty & ~CEPH_CAP_ANY_FILE_WR)) { |
a8599bd8 | 2114 | ret = wait_event_interruptible(ci->i_cap_wq, |
da819c81 | 2115 | caps_are_flushed(inode, flush_tid)); |
a8599bd8 | 2116 | } |
5955102c | 2117 | inode_unlock(inode); |
da819c81 YZ |
2118 | out: |
2119 | dout("fsync %p%s result=%d\n", inode, datasync ? " datasync" : "", ret); | |
a8599bd8 SW |
2120 | return ret; |
2121 | } | |
2122 | ||
2123 | /* | |
2124 | * Flush any dirty caps back to the mds. If we aren't asked to wait, | |
2125 | * queue inode for flush but don't do so immediately, because we can | |
2126 | * get by with fewer MDS messages if we wait for data writeback to | |
2127 | * complete first. | |
2128 | */ | |
f1a3d572 | 2129 | int ceph_write_inode(struct inode *inode, struct writeback_control *wbc) |
a8599bd8 SW |
2130 | { |
2131 | struct ceph_inode_info *ci = ceph_inode(inode); | |
553adfd9 | 2132 | u64 flush_tid; |
a8599bd8 SW |
2133 | int err = 0; |
2134 | int dirty; | |
f1a3d572 | 2135 | int wait = wbc->sync_mode == WB_SYNC_ALL; |
a8599bd8 SW |
2136 | |
2137 | dout("write_inode %p wait=%d\n", inode, wait); | |
2138 | if (wait) { | |
553adfd9 | 2139 | dirty = try_flush_caps(inode, &flush_tid); |
a8599bd8 SW |
2140 | if (dirty) |
2141 | err = wait_event_interruptible(ci->i_cap_wq, | |
2142 | caps_are_flushed(inode, flush_tid)); | |
2143 | } else { | |
640ef79d | 2144 | struct ceph_mds_client *mdsc = |
3d14c5d2 | 2145 | ceph_sb_to_client(inode->i_sb)->mdsc; |
a8599bd8 | 2146 | |
be655596 | 2147 | spin_lock(&ci->i_ceph_lock); |
a8599bd8 SW |
2148 | if (__ceph_caps_dirty(ci)) |
2149 | __cap_delay_requeue_front(mdsc, ci); | |
be655596 | 2150 | spin_unlock(&ci->i_ceph_lock); |
a8599bd8 SW |
2151 | } |
2152 | return err; | |
2153 | } | |
2154 | ||
0e294387 YZ |
2155 | static void __kick_flushing_caps(struct ceph_mds_client *mdsc, |
2156 | struct ceph_mds_session *session, | |
2157 | struct ceph_inode_info *ci, | |
2158 | u64 oldest_flush_tid) | |
2159 | __releases(ci->i_ceph_lock) | |
2160 | __acquires(ci->i_ceph_lock) | |
553adfd9 YZ |
2161 | { |
2162 | struct inode *inode = &ci->vfs_inode; | |
2163 | struct ceph_cap *cap; | |
2164 | struct ceph_cap_flush *cf; | |
0e294387 | 2165 | int ret; |
553adfd9 YZ |
2166 | u64 first_tid = 0; |
2167 | ||
e4500b5e YZ |
2168 | list_for_each_entry(cf, &ci->i_cap_flush_list, i_list) { |
2169 | if (cf->tid < first_tid) | |
2170 | continue; | |
2171 | ||
553adfd9 YZ |
2172 | cap = ci->i_auth_cap; |
2173 | if (!(cap && cap->session == session)) { | |
0e294387 YZ |
2174 | pr_err("%p auth cap %p not mds%d ???\n", |
2175 | inode, cap, session->s_mds); | |
553adfd9 YZ |
2176 | break; |
2177 | } | |
2178 | ||
553adfd9 YZ |
2179 | first_tid = cf->tid + 1; |
2180 | ||
0e294387 YZ |
2181 | if (cf->caps) { |
2182 | dout("kick_flushing_caps %p cap %p tid %llu %s\n", | |
2183 | inode, cap, cf->tid, ceph_cap_string(cf->caps)); | |
2184 | ci->i_ceph_flags |= CEPH_I_NODELAY; | |
2185 | ret = __send_cap(mdsc, cap, CEPH_CAP_OP_FLUSH, | |
1e4ef0c6 | 2186 | false, __ceph_caps_used(ci), |
0e294387 YZ |
2187 | __ceph_caps_wanted(ci), |
2188 | cap->issued | cap->implemented, | |
2189 | cf->caps, cf->tid, oldest_flush_tid); | |
2190 | if (ret) { | |
2191 | pr_err("kick_flushing_caps: error sending " | |
2192 | "cap flush, ino (%llx.%llx) " | |
2193 | "tid %llu flushing %s\n", | |
2194 | ceph_vinop(inode), cf->tid, | |
2195 | ceph_cap_string(cf->caps)); | |
2196 | } | |
2197 | } else { | |
2198 | struct ceph_cap_snap *capsnap = | |
2199 | container_of(cf, struct ceph_cap_snap, | |
2200 | cap_flush); | |
2201 | dout("kick_flushing_caps %p capsnap %p tid %llu %s\n", | |
2202 | inode, capsnap, cf->tid, | |
2203 | ceph_cap_string(capsnap->dirty)); | |
2204 | ||
805692d0 | 2205 | refcount_inc(&capsnap->nref); |
0e294387 YZ |
2206 | spin_unlock(&ci->i_ceph_lock); |
2207 | ||
2208 | ret = __send_flush_snap(inode, session, capsnap, cap->mseq, | |
2209 | oldest_flush_tid); | |
2210 | if (ret < 0) { | |
2211 | pr_err("kick_flushing_caps: error sending " | |
2212 | "cap flushsnap, ino (%llx.%llx) " | |
2213 | "tid %llu follows %llu\n", | |
2214 | ceph_vinop(inode), cf->tid, | |
2215 | capsnap->follows); | |
2216 | } | |
2217 | ||
2218 | ceph_put_cap_snap(capsnap); | |
2219 | } | |
e4500b5e YZ |
2220 | |
2221 | spin_lock(&ci->i_ceph_lock); | |
553adfd9 | 2222 | } |
553adfd9 YZ |
2223 | } |
2224 | ||
e548e9b9 YZ |
2225 | void ceph_early_kick_flushing_caps(struct ceph_mds_client *mdsc, |
2226 | struct ceph_mds_session *session) | |
2227 | { | |
2228 | struct ceph_inode_info *ci; | |
2229 | struct ceph_cap *cap; | |
0e294387 | 2230 | u64 oldest_flush_tid; |
e548e9b9 YZ |
2231 | |
2232 | dout("early_kick_flushing_caps mds%d\n", session->s_mds); | |
0e294387 YZ |
2233 | |
2234 | spin_lock(&mdsc->cap_dirty_lock); | |
2235 | oldest_flush_tid = __get_oldest_flush_tid(mdsc); | |
2236 | spin_unlock(&mdsc->cap_dirty_lock); | |
2237 | ||
e548e9b9 YZ |
2238 | list_for_each_entry(ci, &session->s_cap_flushing, i_flushing_item) { |
2239 | spin_lock(&ci->i_ceph_lock); | |
2240 | cap = ci->i_auth_cap; | |
2241 | if (!(cap && cap->session == session)) { | |
2242 | pr_err("%p auth cap %p not mds%d ???\n", | |
2243 | &ci->vfs_inode, cap, session->s_mds); | |
2244 | spin_unlock(&ci->i_ceph_lock); | |
2245 | continue; | |
2246 | } | |
2247 | ||
2248 | ||
2249 | /* | |
2250 | * if flushing caps were revoked, we re-send the cap flush | |
2251 | * in client reconnect stage. This guarantees MDS * processes | |
2252 | * the cap flush message before issuing the flushing caps to | |
2253 | * other client. | |
2254 | */ | |
2255 | if ((cap->issued & ci->i_flushing_caps) != | |
2256 | ci->i_flushing_caps) { | |
13c2b57d | 2257 | ci->i_ceph_flags &= ~CEPH_I_KICK_FLUSH; |
0e294387 YZ |
2258 | __kick_flushing_caps(mdsc, session, ci, |
2259 | oldest_flush_tid); | |
13c2b57d YZ |
2260 | } else { |
2261 | ci->i_ceph_flags |= CEPH_I_KICK_FLUSH; | |
e548e9b9 YZ |
2262 | } |
2263 | ||
e548e9b9 YZ |
2264 | spin_unlock(&ci->i_ceph_lock); |
2265 | } | |
2266 | } | |
2267 | ||
a8599bd8 SW |
2268 | void ceph_kick_flushing_caps(struct ceph_mds_client *mdsc, |
2269 | struct ceph_mds_session *session) | |
2270 | { | |
2271 | struct ceph_inode_info *ci; | |
13c2b57d | 2272 | struct ceph_cap *cap; |
0e294387 | 2273 | u64 oldest_flush_tid; |
a8599bd8 SW |
2274 | |
2275 | dout("kick_flushing_caps mds%d\n", session->s_mds); | |
0e294387 YZ |
2276 | |
2277 | spin_lock(&mdsc->cap_dirty_lock); | |
2278 | oldest_flush_tid = __get_oldest_flush_tid(mdsc); | |
2279 | spin_unlock(&mdsc->cap_dirty_lock); | |
2280 | ||
a8599bd8 | 2281 | list_for_each_entry(ci, &session->s_cap_flushing, i_flushing_item) { |
0e294387 | 2282 | spin_lock(&ci->i_ceph_lock); |
13c2b57d YZ |
2283 | cap = ci->i_auth_cap; |
2284 | if (!(cap && cap->session == session)) { | |
2285 | pr_err("%p auth cap %p not mds%d ???\n", | |
2286 | &ci->vfs_inode, cap, session->s_mds); | |
2287 | spin_unlock(&ci->i_ceph_lock); | |
2288 | continue; | |
2289 | } | |
2290 | if (ci->i_ceph_flags & CEPH_I_KICK_FLUSH) { | |
2291 | ci->i_ceph_flags &= ~CEPH_I_KICK_FLUSH; | |
2292 | __kick_flushing_caps(mdsc, session, ci, | |
2293 | oldest_flush_tid); | |
2294 | } | |
0e294387 | 2295 | spin_unlock(&ci->i_ceph_lock); |
a8599bd8 SW |
2296 | } |
2297 | } | |
2298 | ||
088b3f5e SW |
2299 | static void kick_flushing_inode_caps(struct ceph_mds_client *mdsc, |
2300 | struct ceph_mds_session *session, | |
2301 | struct inode *inode) | |
0e294387 | 2302 | __releases(ci->i_ceph_lock) |
088b3f5e SW |
2303 | { |
2304 | struct ceph_inode_info *ci = ceph_inode(inode); | |
2305 | struct ceph_cap *cap; | |
088b3f5e | 2306 | |
088b3f5e | 2307 | cap = ci->i_auth_cap; |
8310b089 YZ |
2308 | dout("kick_flushing_inode_caps %p flushing %s\n", inode, |
2309 | ceph_cap_string(ci->i_flushing_caps)); | |
005c4697 | 2310 | |
0e294387 YZ |
2311 | if (!list_empty(&ci->i_cap_flush_list)) { |
2312 | u64 oldest_flush_tid; | |
005c4697 YZ |
2313 | spin_lock(&mdsc->cap_dirty_lock); |
2314 | list_move_tail(&ci->i_flushing_item, | |
2315 | &cap->session->s_cap_flushing); | |
0e294387 | 2316 | oldest_flush_tid = __get_oldest_flush_tid(mdsc); |
005c4697 YZ |
2317 | spin_unlock(&mdsc->cap_dirty_lock); |
2318 | ||
13c2b57d | 2319 | ci->i_ceph_flags &= ~CEPH_I_KICK_FLUSH; |
0e294387 | 2320 | __kick_flushing_caps(mdsc, session, ci, oldest_flush_tid); |
553adfd9 | 2321 | spin_unlock(&ci->i_ceph_lock); |
088b3f5e | 2322 | } else { |
be655596 | 2323 | spin_unlock(&ci->i_ceph_lock); |
088b3f5e SW |
2324 | } |
2325 | } | |
2326 | ||
a8599bd8 SW |
2327 | |
2328 | /* | |
2329 | * Take references to capabilities we hold, so that we don't release | |
2330 | * them to the MDS prematurely. | |
2331 | * | |
be655596 | 2332 | * Protected by i_ceph_lock. |
a8599bd8 | 2333 | */ |
5dda377c YZ |
2334 | static void __take_cap_refs(struct ceph_inode_info *ci, int got, |
2335 | bool snap_rwsem_locked) | |
a8599bd8 SW |
2336 | { |
2337 | if (got & CEPH_CAP_PIN) | |
2338 | ci->i_pin_ref++; | |
2339 | if (got & CEPH_CAP_FILE_RD) | |
2340 | ci->i_rd_ref++; | |
2341 | if (got & CEPH_CAP_FILE_CACHE) | |
2342 | ci->i_rdcache_ref++; | |
5dda377c YZ |
2343 | if (got & CEPH_CAP_FILE_WR) { |
2344 | if (ci->i_wr_ref == 0 && !ci->i_head_snapc) { | |
2345 | BUG_ON(!snap_rwsem_locked); | |
2346 | ci->i_head_snapc = ceph_get_snap_context( | |
2347 | ci->i_snap_realm->cached_context); | |
2348 | } | |
a8599bd8 | 2349 | ci->i_wr_ref++; |
5dda377c | 2350 | } |
a8599bd8 | 2351 | if (got & CEPH_CAP_FILE_BUFFER) { |
d3d0720d | 2352 | if (ci->i_wb_ref == 0) |
3772d26d | 2353 | ihold(&ci->vfs_inode); |
d3d0720d HC |
2354 | ci->i_wb_ref++; |
2355 | dout("__take_cap_refs %p wb %d -> %d (?)\n", | |
2356 | &ci->vfs_inode, ci->i_wb_ref-1, ci->i_wb_ref); | |
a8599bd8 SW |
2357 | } |
2358 | } | |
2359 | ||
2360 | /* | |
2361 | * Try to grab cap references. Specify those refs we @want, and the | |
2362 | * minimal set we @need. Also include the larger offset we are writing | |
2363 | * to (when applicable), and check against max_size here as well. | |
2364 | * Note that caller is responsible for ensuring max_size increases are | |
2365 | * requested from the MDS. | |
2366 | */ | |
2367 | static int try_get_cap_refs(struct ceph_inode_info *ci, int need, int want, | |
5dda377c | 2368 | loff_t endoff, bool nonblock, int *got, int *err) |
a8599bd8 SW |
2369 | { |
2370 | struct inode *inode = &ci->vfs_inode; | |
5dda377c | 2371 | struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc; |
a8599bd8 | 2372 | int ret = 0; |
c4d4a582 | 2373 | int have, implemented; |
195d3ce2 | 2374 | int file_wanted; |
5dda377c | 2375 | bool snap_rwsem_locked = false; |
a8599bd8 SW |
2376 | |
2377 | dout("get_cap_refs %p need %s want %s\n", inode, | |
2378 | ceph_cap_string(need), ceph_cap_string(want)); | |
c4d4a582 | 2379 | |
5dda377c | 2380 | again: |
be655596 | 2381 | spin_lock(&ci->i_ceph_lock); |
a8599bd8 | 2382 | |
195d3ce2 SW |
2383 | /* make sure file is actually open */ |
2384 | file_wanted = __ceph_caps_file_wanted(ci); | |
77310320 | 2385 | if ((file_wanted & need) != need) { |
195d3ce2 SW |
2386 | dout("try_get_cap_refs need %s file_wanted %s, EBADF\n", |
2387 | ceph_cap_string(need), ceph_cap_string(file_wanted)); | |
a8599bd8 SW |
2388 | *err = -EBADF; |
2389 | ret = 1; | |
3738daa6 | 2390 | goto out_unlock; |
a8599bd8 SW |
2391 | } |
2392 | ||
37505d57 YZ |
2393 | /* finish pending truncate */ |
2394 | while (ci->i_truncate_pending) { | |
2395 | spin_unlock(&ci->i_ceph_lock); | |
5dda377c YZ |
2396 | if (snap_rwsem_locked) { |
2397 | up_read(&mdsc->snap_rwsem); | |
2398 | snap_rwsem_locked = false; | |
2399 | } | |
b415bf4f | 2400 | __ceph_do_pending_vmtruncate(inode); |
37505d57 YZ |
2401 | spin_lock(&ci->i_ceph_lock); |
2402 | } | |
2403 | ||
3871cbb9 YZ |
2404 | have = __ceph_caps_issued(ci, &implemented); |
2405 | ||
2406 | if (have & need & CEPH_CAP_FILE_WR) { | |
a8599bd8 SW |
2407 | if (endoff >= 0 && endoff > (loff_t)ci->i_max_size) { |
2408 | dout("get_cap_refs %p endoff %llu > maxsize %llu\n", | |
2409 | inode, endoff, ci->i_max_size); | |
3871cbb9 | 2410 | if (endoff > ci->i_requested_max_size) { |
5dda377c | 2411 | *err = -EAGAIN; |
a8599bd8 SW |
2412 | ret = 1; |
2413 | } | |
3738daa6 | 2414 | goto out_unlock; |
a8599bd8 SW |
2415 | } |
2416 | /* | |
2417 | * If a sync write is in progress, we must wait, so that we | |
2418 | * can get a final snapshot value for size+mtime. | |
2419 | */ | |
2420 | if (__ceph_have_pending_cap_snap(ci)) { | |
2421 | dout("get_cap_refs %p cap_snap_pending\n", inode); | |
3738daa6 | 2422 | goto out_unlock; |
a8599bd8 SW |
2423 | } |
2424 | } | |
a8599bd8 | 2425 | |
a8599bd8 SW |
2426 | if ((have & need) == need) { |
2427 | /* | |
2428 | * Look at (implemented & ~have & not) so that we keep waiting | |
2429 | * on transition from wanted -> needed caps. This is needed | |
2430 | * for WRBUFFER|WR -> WR to avoid a new WR sync write from | |
2431 | * going before a prior buffered writeback happens. | |
2432 | */ | |
2433 | int not = want & ~(have & need); | |
2434 | int revoking = implemented & ~have; | |
2435 | dout("get_cap_refs %p have %s but not %s (revoking %s)\n", | |
2436 | inode, ceph_cap_string(have), ceph_cap_string(not), | |
2437 | ceph_cap_string(revoking)); | |
2438 | if ((revoking & not) == 0) { | |
5dda377c YZ |
2439 | if (!snap_rwsem_locked && |
2440 | !ci->i_head_snapc && | |
2441 | (need & CEPH_CAP_FILE_WR)) { | |
2442 | if (!down_read_trylock(&mdsc->snap_rwsem)) { | |
2443 | /* | |
2444 | * we can not call down_read() when | |
2445 | * task isn't in TASK_RUNNING state | |
2446 | */ | |
2447 | if (nonblock) { | |
2448 | *err = -EAGAIN; | |
2449 | ret = 1; | |
2450 | goto out_unlock; | |
2451 | } | |
2452 | ||
2453 | spin_unlock(&ci->i_ceph_lock); | |
2454 | down_read(&mdsc->snap_rwsem); | |
2455 | snap_rwsem_locked = true; | |
2456 | goto again; | |
2457 | } | |
2458 | snap_rwsem_locked = true; | |
2459 | } | |
c4d4a582 | 2460 | *got = need | (have & want); |
f7f7e7a0 YZ |
2461 | if ((need & CEPH_CAP_FILE_RD) && |
2462 | !(*got & CEPH_CAP_FILE_CACHE)) | |
2463 | ceph_disable_fscache_readpage(ci); | |
5dda377c | 2464 | __take_cap_refs(ci, *got, true); |
a8599bd8 SW |
2465 | ret = 1; |
2466 | } | |
2467 | } else { | |
03f4fcb0 YZ |
2468 | int session_readonly = false; |
2469 | if ((need & CEPH_CAP_FILE_WR) && ci->i_auth_cap) { | |
2470 | struct ceph_mds_session *s = ci->i_auth_cap->session; | |
2471 | spin_lock(&s->s_cap_lock); | |
2472 | session_readonly = s->s_readonly; | |
2473 | spin_unlock(&s->s_cap_lock); | |
2474 | } | |
2475 | if (session_readonly) { | |
2476 | dout("get_cap_refs %p needed %s but mds%d readonly\n", | |
2477 | inode, ceph_cap_string(need), ci->i_auth_cap->mds); | |
2478 | *err = -EROFS; | |
2479 | ret = 1; | |
2480 | goto out_unlock; | |
2481 | } | |
2482 | ||
77310320 YZ |
2483 | if (ci->i_ceph_flags & CEPH_I_CAP_DROPPED) { |
2484 | int mds_wanted; | |
52953d55 | 2485 | if (READ_ONCE(mdsc->fsc->mount_state) == |
77310320 YZ |
2486 | CEPH_MOUNT_SHUTDOWN) { |
2487 | dout("get_cap_refs %p forced umount\n", inode); | |
2488 | *err = -EIO; | |
2489 | ret = 1; | |
2490 | goto out_unlock; | |
2491 | } | |
c1944fed | 2492 | mds_wanted = __ceph_caps_mds_wanted(ci, false); |
eb65b919 | 2493 | if (need & ~(mds_wanted & need)) { |
77310320 YZ |
2494 | dout("get_cap_refs %p caps were dropped" |
2495 | " (session killed?)\n", inode); | |
2496 | *err = -ESTALE; | |
2497 | ret = 1; | |
2498 | goto out_unlock; | |
2499 | } | |
eb65b919 | 2500 | if (!(file_wanted & ~mds_wanted)) |
77310320 | 2501 | ci->i_ceph_flags &= ~CEPH_I_CAP_DROPPED; |
48fec5d0 YZ |
2502 | } |
2503 | ||
a8599bd8 SW |
2504 | dout("get_cap_refs %p have %s needed %s\n", inode, |
2505 | ceph_cap_string(have), ceph_cap_string(need)); | |
2506 | } | |
3738daa6 | 2507 | out_unlock: |
be655596 | 2508 | spin_unlock(&ci->i_ceph_lock); |
5dda377c YZ |
2509 | if (snap_rwsem_locked) |
2510 | up_read(&mdsc->snap_rwsem); | |
3738daa6 | 2511 | |
a8599bd8 | 2512 | dout("get_cap_refs %p ret %d got %s\n", inode, |
c4d4a582 | 2513 | ret, ceph_cap_string(*got)); |
a8599bd8 SW |
2514 | return ret; |
2515 | } | |
2516 | ||
2517 | /* | |
2518 | * Check the offset we are writing up to against our current | |
2519 | * max_size. If necessary, tell the MDS we want to write to | |
2520 | * a larger offset. | |
2521 | */ | |
2522 | static void check_max_size(struct inode *inode, loff_t endoff) | |
2523 | { | |
2524 | struct ceph_inode_info *ci = ceph_inode(inode); | |
2525 | int check = 0; | |
2526 | ||
2527 | /* do we need to explicitly request a larger max_size? */ | |
be655596 | 2528 | spin_lock(&ci->i_ceph_lock); |
3871cbb9 | 2529 | if (endoff >= ci->i_max_size && endoff > ci->i_wanted_max_size) { |
a8599bd8 SW |
2530 | dout("write %p at large endoff %llu, req max_size\n", |
2531 | inode, endoff); | |
2532 | ci->i_wanted_max_size = endoff; | |
a8599bd8 | 2533 | } |
3871cbb9 YZ |
2534 | /* duplicate ceph_check_caps()'s logic */ |
2535 | if (ci->i_auth_cap && | |
2536 | (ci->i_auth_cap->issued & CEPH_CAP_FILE_WR) && | |
2537 | ci->i_wanted_max_size > ci->i_max_size && | |
2538 | ci->i_wanted_max_size > ci->i_requested_max_size) | |
2539 | check = 1; | |
be655596 | 2540 | spin_unlock(&ci->i_ceph_lock); |
a8599bd8 SW |
2541 | if (check) |
2542 | ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL); | |
2543 | } | |
2544 | ||
2b1ac852 YZ |
2545 | int ceph_try_get_caps(struct ceph_inode_info *ci, int need, int want, int *got) |
2546 | { | |
2547 | int ret, err = 0; | |
2548 | ||
2549 | BUG_ON(need & ~CEPH_CAP_FILE_RD); | |
2550 | BUG_ON(want & ~(CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)); | |
2551 | ret = ceph_pool_perm_check(ci, need); | |
2552 | if (ret < 0) | |
2553 | return ret; | |
2554 | ||
2555 | ret = try_get_cap_refs(ci, need, want, 0, true, got, &err); | |
2556 | if (ret) { | |
2557 | if (err == -EAGAIN) { | |
2558 | ret = 0; | |
2559 | } else if (err < 0) { | |
2560 | ret = err; | |
2561 | } | |
2562 | } | |
2563 | return ret; | |
2564 | } | |
2565 | ||
a8599bd8 SW |
2566 | /* |
2567 | * Wait for caps, and take cap references. If we can't get a WR cap | |
2568 | * due to a small max_size, make sure we check_max_size (and possibly | |
2569 | * ask the mds) so we don't get hung up indefinitely. | |
2570 | */ | |
3738daa6 YZ |
2571 | int ceph_get_caps(struct ceph_inode_info *ci, int need, int want, |
2572 | loff_t endoff, int *got, struct page **pinned_page) | |
a8599bd8 | 2573 | { |
5dda377c | 2574 | int _got, ret, err = 0; |
a8599bd8 | 2575 | |
10183a69 YZ |
2576 | ret = ceph_pool_perm_check(ci, need); |
2577 | if (ret < 0) | |
2578 | return ret; | |
2579 | ||
5dda377c YZ |
2580 | while (true) { |
2581 | if (endoff > 0) | |
2582 | check_max_size(&ci->vfs_inode, endoff); | |
c4d4a582 | 2583 | |
5dda377c YZ |
2584 | err = 0; |
2585 | _got = 0; | |
2586 | ret = try_get_cap_refs(ci, need, want, endoff, | |
2587 | false, &_got, &err); | |
2588 | if (ret) { | |
2589 | if (err == -EAGAIN) | |
2590 | continue; | |
2591 | if (err < 0) | |
77310320 | 2592 | ret = err; |
5dda377c | 2593 | } else { |
5c341ee3 NB |
2594 | DEFINE_WAIT_FUNC(wait, woken_wake_function); |
2595 | add_wait_queue(&ci->i_cap_wq, &wait); | |
2596 | ||
2597 | while (!try_get_cap_refs(ci, need, want, endoff, | |
6e09d0fb YZ |
2598 | true, &_got, &err)) { |
2599 | if (signal_pending(current)) { | |
2600 | ret = -ERESTARTSYS; | |
2601 | break; | |
2602 | } | |
5c341ee3 | 2603 | wait_woken(&wait, TASK_INTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT); |
6e09d0fb | 2604 | } |
5c341ee3 NB |
2605 | |
2606 | remove_wait_queue(&ci->i_cap_wq, &wait); | |
2607 | ||
5dda377c YZ |
2608 | if (err == -EAGAIN) |
2609 | continue; | |
2610 | if (err < 0) | |
2611 | ret = err; | |
77310320 YZ |
2612 | } |
2613 | if (ret < 0) { | |
2614 | if (err == -ESTALE) { | |
2615 | /* session was killed, try renew caps */ | |
2616 | ret = ceph_renew_caps(&ci->vfs_inode); | |
2617 | if (ret == 0) | |
2618 | continue; | |
2619 | } | |
2620 | return ret; | |
5dda377c | 2621 | } |
c4d4a582 | 2622 | |
5dda377c YZ |
2623 | if (ci->i_inline_version != CEPH_INLINE_NONE && |
2624 | (_got & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)) && | |
2625 | i_size_read(&ci->vfs_inode) > 0) { | |
2626 | struct page *page = | |
2627 | find_get_page(ci->vfs_inode.i_mapping, 0); | |
2628 | if (page) { | |
2629 | if (PageUptodate(page)) { | |
2630 | *pinned_page = page; | |
2631 | break; | |
2632 | } | |
09cbfeaf | 2633 | put_page(page); |
c4d4a582 | 2634 | } |
5dda377c YZ |
2635 | /* |
2636 | * drop cap refs first because getattr while | |
2637 | * holding * caps refs can cause deadlock. | |
2638 | */ | |
2639 | ceph_put_cap_refs(ci, _got); | |
2640 | _got = 0; | |
c4d4a582 | 2641 | |
5dda377c YZ |
2642 | /* |
2643 | * getattr request will bring inline data into | |
2644 | * page cache | |
2645 | */ | |
2646 | ret = __ceph_do_getattr(&ci->vfs_inode, NULL, | |
2647 | CEPH_STAT_CAP_INLINE_DATA, | |
2648 | true); | |
2649 | if (ret < 0) | |
2650 | return ret; | |
2651 | continue; | |
2652 | } | |
2653 | break; | |
c4d4a582 | 2654 | } |
5dda377c | 2655 | |
f7f7e7a0 YZ |
2656 | if ((_got & CEPH_CAP_FILE_RD) && (_got & CEPH_CAP_FILE_CACHE)) |
2657 | ceph_fscache_revalidate_cookie(ci); | |
2658 | ||
c4d4a582 YZ |
2659 | *got = _got; |
2660 | return 0; | |
a8599bd8 SW |
2661 | } |
2662 | ||
2663 | /* | |
2664 | * Take cap refs. Caller must already know we hold at least one ref | |
2665 | * on the caps in question or we don't know this is safe. | |
2666 | */ | |
2667 | void ceph_get_cap_refs(struct ceph_inode_info *ci, int caps) | |
2668 | { | |
be655596 | 2669 | spin_lock(&ci->i_ceph_lock); |
5dda377c | 2670 | __take_cap_refs(ci, caps, false); |
be655596 | 2671 | spin_unlock(&ci->i_ceph_lock); |
a8599bd8 SW |
2672 | } |
2673 | ||
86056090 YZ |
2674 | |
2675 | /* | |
2676 | * drop cap_snap that is not associated with any snapshot. | |
2677 | * we don't need to send FLUSHSNAP message for it. | |
2678 | */ | |
70220ac8 YZ |
2679 | static int ceph_try_drop_cap_snap(struct ceph_inode_info *ci, |
2680 | struct ceph_cap_snap *capsnap) | |
86056090 YZ |
2681 | { |
2682 | if (!capsnap->need_flush && | |
2683 | !capsnap->writing && !capsnap->dirty_pages) { | |
86056090 YZ |
2684 | dout("dropping cap_snap %p follows %llu\n", |
2685 | capsnap, capsnap->follows); | |
0e294387 | 2686 | BUG_ON(capsnap->cap_flush.tid > 0); |
86056090 | 2687 | ceph_put_snap_context(capsnap->context); |
70220ac8 YZ |
2688 | if (!list_is_last(&capsnap->ci_item, &ci->i_cap_snaps)) |
2689 | ci->i_ceph_flags |= CEPH_I_FLUSH_SNAPS; | |
2690 | ||
86056090 | 2691 | list_del(&capsnap->ci_item); |
86056090 YZ |
2692 | ceph_put_cap_snap(capsnap); |
2693 | return 1; | |
2694 | } | |
2695 | return 0; | |
2696 | } | |
2697 | ||
a8599bd8 SW |
2698 | /* |
2699 | * Release cap refs. | |
2700 | * | |
2701 | * If we released the last ref on any given cap, call ceph_check_caps | |
2702 | * to release (or schedule a release). | |
2703 | * | |
2704 | * If we are releasing a WR cap (from a sync write), finalize any affected | |
2705 | * cap_snap, and wake up any waiters. | |
2706 | */ | |
2707 | void ceph_put_cap_refs(struct ceph_inode_info *ci, int had) | |
2708 | { | |
2709 | struct inode *inode = &ci->vfs_inode; | |
2710 | int last = 0, put = 0, flushsnaps = 0, wake = 0; | |
a8599bd8 | 2711 | |
be655596 | 2712 | spin_lock(&ci->i_ceph_lock); |
a8599bd8 SW |
2713 | if (had & CEPH_CAP_PIN) |
2714 | --ci->i_pin_ref; | |
2715 | if (had & CEPH_CAP_FILE_RD) | |
2716 | if (--ci->i_rd_ref == 0) | |
2717 | last++; | |
2718 | if (had & CEPH_CAP_FILE_CACHE) | |
2719 | if (--ci->i_rdcache_ref == 0) | |
2720 | last++; | |
2721 | if (had & CEPH_CAP_FILE_BUFFER) { | |
d3d0720d | 2722 | if (--ci->i_wb_ref == 0) { |
a8599bd8 SW |
2723 | last++; |
2724 | put++; | |
2725 | } | |
d3d0720d HC |
2726 | dout("put_cap_refs %p wb %d -> %d (?)\n", |
2727 | inode, ci->i_wb_ref+1, ci->i_wb_ref); | |
a8599bd8 SW |
2728 | } |
2729 | if (had & CEPH_CAP_FILE_WR) | |
2730 | if (--ci->i_wr_ref == 0) { | |
2731 | last++; | |
86056090 YZ |
2732 | if (__ceph_have_pending_cap_snap(ci)) { |
2733 | struct ceph_cap_snap *capsnap = | |
2734 | list_last_entry(&ci->i_cap_snaps, | |
2735 | struct ceph_cap_snap, | |
2736 | ci_item); | |
2737 | capsnap->writing = 0; | |
70220ac8 | 2738 | if (ceph_try_drop_cap_snap(ci, capsnap)) |
86056090 YZ |
2739 | put++; |
2740 | else if (__ceph_finish_cap_snap(ci, capsnap)) | |
2741 | flushsnaps = 1; | |
2742 | wake = 1; | |
a8599bd8 | 2743 | } |
5dda377c YZ |
2744 | if (ci->i_wrbuffer_ref_head == 0 && |
2745 | ci->i_dirty_caps == 0 && | |
2746 | ci->i_flushing_caps == 0) { | |
2747 | BUG_ON(!ci->i_head_snapc); | |
2748 | ceph_put_snap_context(ci->i_head_snapc); | |
2749 | ci->i_head_snapc = NULL; | |
2750 | } | |
db40cc17 YZ |
2751 | /* see comment in __ceph_remove_cap() */ |
2752 | if (!__ceph_is_any_caps(ci) && ci->i_snap_realm) | |
2753 | drop_inode_snap_realm(ci); | |
a8599bd8 | 2754 | } |
be655596 | 2755 | spin_unlock(&ci->i_ceph_lock); |
a8599bd8 | 2756 | |
819ccbfa SW |
2757 | dout("put_cap_refs %p had %s%s%s\n", inode, ceph_cap_string(had), |
2758 | last ? " last" : "", put ? " put" : ""); | |
a8599bd8 SW |
2759 | |
2760 | if (last && !flushsnaps) | |
2761 | ceph_check_caps(ci, 0, NULL); | |
2762 | else if (flushsnaps) | |
ed9b430c | 2763 | ceph_flush_snaps(ci, NULL); |
a8599bd8 | 2764 | if (wake) |
03066f23 | 2765 | wake_up_all(&ci->i_cap_wq); |
86056090 | 2766 | while (put-- > 0) |
a8599bd8 SW |
2767 | iput(inode); |
2768 | } | |
2769 | ||
2770 | /* | |
2771 | * Release @nr WRBUFFER refs on dirty pages for the given @snapc snap | |
2772 | * context. Adjust per-snap dirty page accounting as appropriate. | |
2773 | * Once all dirty data for a cap_snap is flushed, flush snapped file | |
2774 | * metadata back to the MDS. If we dropped the last ref, call | |
2775 | * ceph_check_caps. | |
2776 | */ | |
2777 | void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info *ci, int nr, | |
2778 | struct ceph_snap_context *snapc) | |
2779 | { | |
2780 | struct inode *inode = &ci->vfs_inode; | |
a8599bd8 | 2781 | struct ceph_cap_snap *capsnap = NULL; |
70220ac8 YZ |
2782 | int put = 0; |
2783 | bool last = false; | |
2784 | bool found = false; | |
2785 | bool flush_snaps = false; | |
2786 | bool complete_capsnap = false; | |
a8599bd8 | 2787 | |
be655596 | 2788 | spin_lock(&ci->i_ceph_lock); |
a8599bd8 | 2789 | ci->i_wrbuffer_ref -= nr; |
70220ac8 YZ |
2790 | if (ci->i_wrbuffer_ref == 0) { |
2791 | last = true; | |
2792 | put++; | |
2793 | } | |
a8599bd8 SW |
2794 | |
2795 | if (ci->i_head_snapc == snapc) { | |
2796 | ci->i_wrbuffer_ref_head -= nr; | |
7d8cb26d | 2797 | if (ci->i_wrbuffer_ref_head == 0 && |
5dda377c YZ |
2798 | ci->i_wr_ref == 0 && |
2799 | ci->i_dirty_caps == 0 && | |
2800 | ci->i_flushing_caps == 0) { | |
7d8cb26d | 2801 | BUG_ON(!ci->i_head_snapc); |
a8599bd8 SW |
2802 | ceph_put_snap_context(ci->i_head_snapc); |
2803 | ci->i_head_snapc = NULL; | |
2804 | } | |
2805 | dout("put_wrbuffer_cap_refs on %p head %d/%d -> %d/%d %s\n", | |
2806 | inode, | |
2807 | ci->i_wrbuffer_ref+nr, ci->i_wrbuffer_ref_head+nr, | |
2808 | ci->i_wrbuffer_ref, ci->i_wrbuffer_ref_head, | |
2809 | last ? " LAST" : ""); | |
2810 | } else { | |
2811 | list_for_each_entry(capsnap, &ci->i_cap_snaps, ci_item) { | |
2812 | if (capsnap->context == snapc) { | |
70220ac8 | 2813 | found = true; |
a8599bd8 SW |
2814 | break; |
2815 | } | |
2816 | } | |
2817 | BUG_ON(!found); | |
819ccbfa SW |
2818 | capsnap->dirty_pages -= nr; |
2819 | if (capsnap->dirty_pages == 0) { | |
70220ac8 YZ |
2820 | complete_capsnap = true; |
2821 | if (!capsnap->writing) { | |
2822 | if (ceph_try_drop_cap_snap(ci, capsnap)) { | |
2823 | put++; | |
2824 | } else { | |
2825 | ci->i_ceph_flags |= CEPH_I_FLUSH_SNAPS; | |
2826 | flush_snaps = true; | |
2827 | } | |
2828 | } | |
819ccbfa | 2829 | } |
a8599bd8 | 2830 | dout("put_wrbuffer_cap_refs on %p cap_snap %p " |
86056090 | 2831 | " snap %lld %d/%d -> %d/%d %s%s\n", |
a8599bd8 SW |
2832 | inode, capsnap, capsnap->context->seq, |
2833 | ci->i_wrbuffer_ref+nr, capsnap->dirty_pages + nr, | |
2834 | ci->i_wrbuffer_ref, capsnap->dirty_pages, | |
2835 | last ? " (wrbuffer last)" : "", | |
86056090 | 2836 | complete_capsnap ? " (complete capsnap)" : ""); |
a8599bd8 SW |
2837 | } |
2838 | ||
be655596 | 2839 | spin_unlock(&ci->i_ceph_lock); |
a8599bd8 SW |
2840 | |
2841 | if (last) { | |
2842 | ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL); | |
70220ac8 | 2843 | } else if (flush_snaps) { |
ed9b430c | 2844 | ceph_flush_snaps(ci, NULL); |
a8599bd8 | 2845 | } |
70220ac8 YZ |
2846 | if (complete_capsnap) |
2847 | wake_up_all(&ci->i_cap_wq); | |
2848 | while (put-- > 0) | |
819ccbfa | 2849 | iput(inode); |
a8599bd8 SW |
2850 | } |
2851 | ||
ca20c991 YZ |
2852 | /* |
2853 | * Invalidate unlinked inode's aliases, so we can drop the inode ASAP. | |
2854 | */ | |
2855 | static void invalidate_aliases(struct inode *inode) | |
2856 | { | |
2857 | struct dentry *dn, *prev = NULL; | |
2858 | ||
2859 | dout("invalidate_aliases inode %p\n", inode); | |
2860 | d_prune_aliases(inode); | |
2861 | /* | |
2862 | * For non-directory inode, d_find_alias() only returns | |
fc12c80a BF |
2863 | * hashed dentry. After calling d_invalidate(), the |
2864 | * dentry becomes unhashed. | |
ca20c991 | 2865 | * |
a8d436f0 | 2866 | * For directory inode, d_find_alias() can return |
fc12c80a | 2867 | * unhashed dentry. But directory inode should have |
ca20c991 YZ |
2868 | * one alias at most. |
2869 | */ | |
2870 | while ((dn = d_find_alias(inode))) { | |
2871 | if (dn == prev) { | |
2872 | dput(dn); | |
2873 | break; | |
2874 | } | |
a8d436f0 | 2875 | d_invalidate(dn); |
ca20c991 YZ |
2876 | if (prev) |
2877 | dput(prev); | |
2878 | prev = dn; | |
2879 | } | |
2880 | if (prev) | |
2881 | dput(prev); | |
2882 | } | |
2883 | ||
a8599bd8 SW |
2884 | /* |
2885 | * Handle a cap GRANT message from the MDS. (Note that a GRANT may | |
2886 | * actually be a revocation if it specifies a smaller cap set.) | |
2887 | * | |
be655596 | 2888 | * caller holds s_mutex and i_ceph_lock, we drop both. |
a8599bd8 | 2889 | */ |
2cd698be YZ |
2890 | static void handle_cap_grant(struct ceph_mds_client *mdsc, |
2891 | struct inode *inode, struct ceph_mds_caps *grant, | |
779fe0fb YZ |
2892 | struct ceph_string **pns, u64 inline_version, |
2893 | void *inline_data, u32 inline_len, | |
2cd698be | 2894 | struct ceph_buffer *xattr_buf, |
15637c8b | 2895 | struct ceph_mds_session *session, |
779fe0fb | 2896 | struct ceph_cap *cap, int issued) |
2cd698be | 2897 | __releases(ci->i_ceph_lock) |
982d6011 | 2898 | __releases(mdsc->snap_rwsem) |
a8599bd8 SW |
2899 | { |
2900 | struct ceph_inode_info *ci = ceph_inode(inode); | |
2901 | int mds = session->s_mds; | |
2f56f56a | 2902 | int seq = le32_to_cpu(grant->seq); |
a8599bd8 | 2903 | int newcaps = le32_to_cpu(grant->caps); |
2cd698be | 2904 | int used, wanted, dirty; |
a8599bd8 SW |
2905 | u64 size = le64_to_cpu(grant->size); |
2906 | u64 max_size = le64_to_cpu(grant->max_size); | |
2907 | struct timespec mtime, atime, ctime; | |
15637c8b | 2908 | int check_caps = 0; |
ab6c2c3e FF |
2909 | bool wake = false; |
2910 | bool writeback = false; | |
2911 | bool queue_trunc = false; | |
2912 | bool queue_invalidate = false; | |
ab6c2c3e | 2913 | bool deleted_inode = false; |
31c542a1 | 2914 | bool fill_inline = false; |
a8599bd8 | 2915 | |
2f56f56a SW |
2916 | dout("handle_cap_grant inode %p cap %p mds%d seq %d %s\n", |
2917 | inode, cap, mds, seq, ceph_cap_string(newcaps)); | |
a8599bd8 SW |
2918 | dout(" size %llu max_size %llu, i_size %llu\n", size, max_size, |
2919 | inode->i_size); | |
2920 | ||
11df2dfb YZ |
2921 | |
2922 | /* | |
2923 | * auth mds of the inode changed. we received the cap export message, | |
2924 | * but still haven't received the cap import message. handle_cap_export | |
2925 | * updated the new auth MDS' cap. | |
2926 | * | |
2927 | * "ceph_seq_cmp(seq, cap->seq) <= 0" means we are processing a message | |
2928 | * that was sent before the cap import message. So don't remove caps. | |
2929 | */ | |
2930 | if (ceph_seq_cmp(seq, cap->seq) <= 0) { | |
2931 | WARN_ON(cap != ci->i_auth_cap); | |
2932 | WARN_ON(cap->cap_id != le64_to_cpu(grant->cap_id)); | |
2933 | seq = cap->seq; | |
2934 | newcaps |= cap->issued; | |
2935 | } | |
2936 | ||
a8599bd8 SW |
2937 | /* |
2938 | * If CACHE is being revoked, and we have no dirty buffers, | |
2939 | * try to invalidate (once). (If there are dirty buffers, we | |
2940 | * will invalidate _after_ writeback.) | |
2941 | */ | |
fdd4e158 YZ |
2942 | if (!S_ISDIR(inode->i_mode) && /* don't invalidate readdir cache */ |
2943 | ((cap->issued & ~newcaps) & CEPH_CAP_FILE_CACHE) && | |
3b454c49 | 2944 | (newcaps & CEPH_CAP_FILE_LAZYIO) == 0 && |
9abd4db7 | 2945 | !(ci->i_wrbuffer_ref || ci->i_wb_ref)) { |
e9075743 | 2946 | if (try_nonblocking_invalidate(inode)) { |
a8599bd8 SW |
2947 | /* there were locked pages.. invalidate later |
2948 | in a separate thread. */ | |
2949 | if (ci->i_rdcache_revoking != ci->i_rdcache_gen) { | |
ab6c2c3e | 2950 | queue_invalidate = true; |
a8599bd8 SW |
2951 | ci->i_rdcache_revoking = ci->i_rdcache_gen; |
2952 | } | |
a8599bd8 | 2953 | } |
a8599bd8 SW |
2954 | } |
2955 | ||
2956 | /* side effects now are allowed */ | |
685f9a5d | 2957 | cap->cap_gen = session->s_cap_gen; |
11df2dfb | 2958 | cap->seq = seq; |
a8599bd8 SW |
2959 | |
2960 | __check_cap_issue(ci, cap, newcaps); | |
2961 | ||
f98a128a YZ |
2962 | if ((newcaps & CEPH_CAP_AUTH_SHARED) && |
2963 | (issued & CEPH_CAP_AUTH_EXCL) == 0) { | |
a8599bd8 | 2964 | inode->i_mode = le32_to_cpu(grant->mode); |
05cb11c1 EB |
2965 | inode->i_uid = make_kuid(&init_user_ns, le32_to_cpu(grant->uid)); |
2966 | inode->i_gid = make_kgid(&init_user_ns, le32_to_cpu(grant->gid)); | |
a8599bd8 | 2967 | dout("%p mode 0%o uid.gid %d.%d\n", inode, inode->i_mode, |
bd2bae6a EB |
2968 | from_kuid(&init_user_ns, inode->i_uid), |
2969 | from_kgid(&init_user_ns, inode->i_gid)); | |
a8599bd8 SW |
2970 | } |
2971 | ||
f98a128a YZ |
2972 | if ((newcaps & CEPH_CAP_AUTH_SHARED) && |
2973 | (issued & CEPH_CAP_LINK_EXCL) == 0) { | |
bfe86848 | 2974 | set_nlink(inode, le32_to_cpu(grant->nlink)); |
ca20c991 YZ |
2975 | if (inode->i_nlink == 0 && |
2976 | (newcaps & (CEPH_CAP_LINK_SHARED | CEPH_CAP_LINK_EXCL))) | |
ab6c2c3e | 2977 | deleted_inode = true; |
ca20c991 | 2978 | } |
a8599bd8 SW |
2979 | |
2980 | if ((issued & CEPH_CAP_XATTR_EXCL) == 0 && grant->xattr_len) { | |
2981 | int len = le32_to_cpu(grant->xattr_len); | |
2982 | u64 version = le64_to_cpu(grant->xattr_version); | |
2983 | ||
2984 | if (version > ci->i_xattrs.version) { | |
2985 | dout(" got new xattrs v%llu on %p len %d\n", | |
2986 | version, inode, len); | |
2987 | if (ci->i_xattrs.blob) | |
2988 | ceph_buffer_put(ci->i_xattrs.blob); | |
2989 | ci->i_xattrs.blob = ceph_buffer_get(xattr_buf); | |
2990 | ci->i_xattrs.version = version; | |
7221fe4c | 2991 | ceph_forget_all_cached_acls(inode); |
a8599bd8 SW |
2992 | } |
2993 | } | |
2994 | ||
f98a128a YZ |
2995 | if (newcaps & CEPH_CAP_ANY_RD) { |
2996 | /* ctime/mtime/atime? */ | |
2997 | ceph_decode_timespec(&mtime, &grant->mtime); | |
2998 | ceph_decode_timespec(&atime, &grant->atime); | |
2999 | ceph_decode_timespec(&ctime, &grant->ctime); | |
3000 | ceph_fill_file_time(inode, issued, | |
3001 | le32_to_cpu(grant->time_warp_seq), | |
3002 | &ctime, &mtime, &atime); | |
3003 | } | |
3004 | ||
3005 | if (newcaps & (CEPH_CAP_ANY_FILE_RD | CEPH_CAP_ANY_FILE_WR)) { | |
3006 | /* file layout may have changed */ | |
7627151e | 3007 | s64 old_pool = ci->i_layout.pool_id; |
779fe0fb YZ |
3008 | struct ceph_string *old_ns; |
3009 | ||
7627151e | 3010 | ceph_file_layout_from_legacy(&ci->i_layout, &grant->layout); |
779fe0fb YZ |
3011 | old_ns = rcu_dereference_protected(ci->i_layout.pool_ns, |
3012 | lockdep_is_held(&ci->i_ceph_lock)); | |
3013 | rcu_assign_pointer(ci->i_layout.pool_ns, *pns); | |
3014 | ||
3015 | if (ci->i_layout.pool_id != old_pool || *pns != old_ns) | |
7627151e | 3016 | ci->i_ceph_flags &= ~CEPH_I_POOL_PERM; |
5ea5c5e0 | 3017 | |
779fe0fb YZ |
3018 | *pns = old_ns; |
3019 | ||
f98a128a YZ |
3020 | /* size/truncate_seq? */ |
3021 | queue_trunc = ceph_fill_file_size(inode, issued, | |
3022 | le32_to_cpu(grant->truncate_seq), | |
3023 | le64_to_cpu(grant->truncate_size), | |
3024 | size); | |
3025 | /* max size increase? */ | |
3026 | if (ci->i_auth_cap == cap && max_size != ci->i_max_size) { | |
3027 | dout("max_size %lld -> %llu\n", | |
3028 | ci->i_max_size, max_size); | |
3029 | ci->i_max_size = max_size; | |
3030 | if (max_size >= ci->i_wanted_max_size) { | |
3031 | ci->i_wanted_max_size = 0; /* reset */ | |
3032 | ci->i_requested_max_size = 0; | |
3033 | } | |
ab6c2c3e | 3034 | wake = true; |
a8599bd8 | 3035 | } |
a8599bd8 SW |
3036 | } |
3037 | ||
3038 | /* check cap bits */ | |
3039 | wanted = __ceph_caps_wanted(ci); | |
3040 | used = __ceph_caps_used(ci); | |
3041 | dirty = __ceph_caps_dirty(ci); | |
3042 | dout(" my wanted = %s, used = %s, dirty %s\n", | |
3043 | ceph_cap_string(wanted), | |
3044 | ceph_cap_string(used), | |
3045 | ceph_cap_string(dirty)); | |
3046 | if (wanted != le32_to_cpu(grant->wanted)) { | |
3047 | dout("mds wanted %s -> %s\n", | |
3048 | ceph_cap_string(le32_to_cpu(grant->wanted)), | |
3049 | ceph_cap_string(wanted)); | |
390306c3 YZ |
3050 | /* imported cap may not have correct mds_wanted */ |
3051 | if (le32_to_cpu(grant->op) == CEPH_CAP_OP_IMPORT) | |
3052 | check_caps = 1; | |
a8599bd8 SW |
3053 | } |
3054 | ||
a8599bd8 SW |
3055 | /* revocation, grant, or no-op? */ |
3056 | if (cap->issued & ~newcaps) { | |
3b454c49 SW |
3057 | int revoking = cap->issued & ~newcaps; |
3058 | ||
3059 | dout("revocation: %s -> %s (revoking %s)\n", | |
3060 | ceph_cap_string(cap->issued), | |
3061 | ceph_cap_string(newcaps), | |
3062 | ceph_cap_string(revoking)); | |
0eb6cd49 | 3063 | if (revoking & used & CEPH_CAP_FILE_BUFFER) |
ab6c2c3e | 3064 | writeback = true; /* initiate writeback; will delay ack */ |
3b454c49 SW |
3065 | else if (revoking == CEPH_CAP_FILE_CACHE && |
3066 | (newcaps & CEPH_CAP_FILE_LAZYIO) == 0 && | |
3067 | queue_invalidate) | |
3068 | ; /* do nothing yet, invalidation will be queued */ | |
3069 | else if (cap == ci->i_auth_cap) | |
3070 | check_caps = 1; /* check auth cap only */ | |
3071 | else | |
3072 | check_caps = 2; /* check all caps */ | |
a8599bd8 | 3073 | cap->issued = newcaps; |
978097c9 | 3074 | cap->implemented |= newcaps; |
a8599bd8 SW |
3075 | } else if (cap->issued == newcaps) { |
3076 | dout("caps unchanged: %s -> %s\n", | |
3077 | ceph_cap_string(cap->issued), ceph_cap_string(newcaps)); | |
3078 | } else { | |
3079 | dout("grant: %s -> %s\n", ceph_cap_string(cap->issued), | |
3080 | ceph_cap_string(newcaps)); | |
6ee6b953 YZ |
3081 | /* non-auth MDS is revoking the newly grant caps ? */ |
3082 | if (cap == ci->i_auth_cap && | |
3083 | __ceph_caps_revoking_other(ci, cap, newcaps)) | |
3084 | check_caps = 2; | |
3085 | ||
a8599bd8 SW |
3086 | cap->issued = newcaps; |
3087 | cap->implemented |= newcaps; /* add bits only, to | |
3088 | * avoid stepping on a | |
3089 | * pending revocation */ | |
ab6c2c3e | 3090 | wake = true; |
a8599bd8 | 3091 | } |
978097c9 | 3092 | BUG_ON(cap->issued & ~cap->implemented); |
a8599bd8 | 3093 | |
31c542a1 YZ |
3094 | if (inline_version > 0 && inline_version >= ci->i_inline_version) { |
3095 | ci->i_inline_version = inline_version; | |
3096 | if (ci->i_inline_version != CEPH_INLINE_NONE && | |
3097 | (newcaps & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO))) | |
3098 | fill_inline = true; | |
3099 | } | |
3100 | ||
2cd698be | 3101 | if (le32_to_cpu(grant->op) == CEPH_CAP_OP_IMPORT) { |
2cd698be | 3102 | if (newcaps & ~issued) |
ab6c2c3e | 3103 | wake = true; |
0e294387 YZ |
3104 | kick_flushing_inode_caps(mdsc, session, inode); |
3105 | up_read(&mdsc->snap_rwsem); | |
3106 | } else { | |
3107 | spin_unlock(&ci->i_ceph_lock); | |
2cd698be YZ |
3108 | } |
3109 | ||
31c542a1 YZ |
3110 | if (fill_inline) |
3111 | ceph_fill_inline_data(inode, NULL, inline_data, inline_len); | |
3112 | ||
14649758 | 3113 | if (queue_trunc) |
c6bcda6f | 3114 | ceph_queue_vmtruncate(inode); |
c6bcda6f | 3115 | |
3c6f6b79 | 3116 | if (writeback) |
a8599bd8 SW |
3117 | /* |
3118 | * queue inode for writeback: we can't actually call | |
3119 | * filemap_write_and_wait, etc. from message handler | |
3120 | * context. | |
3121 | */ | |
3c6f6b79 SW |
3122 | ceph_queue_writeback(inode); |
3123 | if (queue_invalidate) | |
3124 | ceph_queue_invalidate(inode); | |
ca20c991 YZ |
3125 | if (deleted_inode) |
3126 | invalidate_aliases(inode); | |
a8599bd8 | 3127 | if (wake) |
03066f23 | 3128 | wake_up_all(&ci->i_cap_wq); |
15637c8b SW |
3129 | |
3130 | if (check_caps == 1) | |
3131 | ceph_check_caps(ci, CHECK_CAPS_NODELAY|CHECK_CAPS_AUTHONLY, | |
3132 | session); | |
3133 | else if (check_caps == 2) | |
3134 | ceph_check_caps(ci, CHECK_CAPS_NODELAY, session); | |
3135 | else | |
3136 | mutex_unlock(&session->s_mutex); | |
a8599bd8 SW |
3137 | } |
3138 | ||
3139 | /* | |
3140 | * Handle FLUSH_ACK from MDS, indicating that metadata we sent to the | |
3141 | * MDS has been safely committed. | |
3142 | */ | |
6df058c0 | 3143 | static void handle_cap_flush_ack(struct inode *inode, u64 flush_tid, |
a8599bd8 SW |
3144 | struct ceph_mds_caps *m, |
3145 | struct ceph_mds_session *session, | |
3146 | struct ceph_cap *cap) | |
be655596 | 3147 | __releases(ci->i_ceph_lock) |
a8599bd8 SW |
3148 | { |
3149 | struct ceph_inode_info *ci = ceph_inode(inode); | |
3d14c5d2 | 3150 | struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc; |
e4500b5e | 3151 | struct ceph_cap_flush *cf, *tmp_cf; |
553adfd9 | 3152 | LIST_HEAD(to_remove); |
a8599bd8 SW |
3153 | unsigned seq = le32_to_cpu(m->seq); |
3154 | int dirty = le32_to_cpu(m->dirty); | |
3155 | int cleaned = 0; | |
c8799fc4 YZ |
3156 | bool drop = false; |
3157 | bool wake_ci = 0; | |
3158 | bool wake_mdsc = 0; | |
a8599bd8 | 3159 | |
e4500b5e | 3160 | list_for_each_entry_safe(cf, tmp_cf, &ci->i_cap_flush_list, i_list) { |
553adfd9 YZ |
3161 | if (cf->tid == flush_tid) |
3162 | cleaned = cf->caps; | |
0e294387 YZ |
3163 | if (cf->caps == 0) /* capsnap */ |
3164 | continue; | |
553adfd9 | 3165 | if (cf->tid <= flush_tid) { |
c8799fc4 YZ |
3166 | if (__finish_cap_flush(NULL, ci, cf)) |
3167 | wake_ci = true; | |
e4500b5e | 3168 | list_add_tail(&cf->i_list, &to_remove); |
553adfd9 YZ |
3169 | } else { |
3170 | cleaned &= ~cf->caps; | |
3171 | if (!cleaned) | |
3172 | break; | |
3173 | } | |
3174 | } | |
a8599bd8 SW |
3175 | |
3176 | dout("handle_cap_flush_ack inode %p mds%d seq %d on %s cleaned %s," | |
3177 | " flushing %s -> %s\n", | |
3178 | inode, session->s_mds, seq, ceph_cap_string(dirty), | |
3179 | ceph_cap_string(cleaned), ceph_cap_string(ci->i_flushing_caps), | |
3180 | ceph_cap_string(ci->i_flushing_caps & ~cleaned)); | |
3181 | ||
8310b089 | 3182 | if (list_empty(&to_remove) && !cleaned) |
a8599bd8 SW |
3183 | goto out; |
3184 | ||
a8599bd8 | 3185 | ci->i_flushing_caps &= ~cleaned; |
a8599bd8 SW |
3186 | |
3187 | spin_lock(&mdsc->cap_dirty_lock); | |
8310b089 | 3188 | |
c8799fc4 YZ |
3189 | list_for_each_entry(cf, &to_remove, i_list) { |
3190 | if (__finish_cap_flush(mdsc, NULL, cf)) | |
3191 | wake_mdsc = true; | |
8310b089 YZ |
3192 | } |
3193 | ||
a8599bd8 | 3194 | if (ci->i_flushing_caps == 0) { |
0e294387 YZ |
3195 | if (list_empty(&ci->i_cap_flush_list)) { |
3196 | list_del_init(&ci->i_flushing_item); | |
3197 | if (!list_empty(&session->s_cap_flushing)) { | |
3198 | dout(" mds%d still flushing cap on %p\n", | |
3199 | session->s_mds, | |
3200 | &list_first_entry(&session->s_cap_flushing, | |
3201 | struct ceph_inode_info, | |
3202 | i_flushing_item)->vfs_inode); | |
3203 | } | |
3204 | } | |
a8599bd8 | 3205 | mdsc->num_cap_flushing--; |
a8599bd8 | 3206 | dout(" inode %p now !flushing\n", inode); |
afcdaea3 SW |
3207 | |
3208 | if (ci->i_dirty_caps == 0) { | |
3209 | dout(" inode %p now clean\n", inode); | |
3210 | BUG_ON(!list_empty(&ci->i_dirty_item)); | |
c8799fc4 | 3211 | drop = true; |
5dda377c YZ |
3212 | if (ci->i_wr_ref == 0 && |
3213 | ci->i_wrbuffer_ref_head == 0) { | |
7d8cb26d SW |
3214 | BUG_ON(!ci->i_head_snapc); |
3215 | ceph_put_snap_context(ci->i_head_snapc); | |
3216 | ci->i_head_snapc = NULL; | |
3217 | } | |
76e3b390 SW |
3218 | } else { |
3219 | BUG_ON(list_empty(&ci->i_dirty_item)); | |
afcdaea3 | 3220 | } |
a8599bd8 SW |
3221 | } |
3222 | spin_unlock(&mdsc->cap_dirty_lock); | |
a8599bd8 SW |
3223 | |
3224 | out: | |
be655596 | 3225 | spin_unlock(&ci->i_ceph_lock); |
553adfd9 YZ |
3226 | |
3227 | while (!list_empty(&to_remove)) { | |
3228 | cf = list_first_entry(&to_remove, | |
e4500b5e YZ |
3229 | struct ceph_cap_flush, i_list); |
3230 | list_del(&cf->i_list); | |
f66fd9f0 | 3231 | ceph_free_cap_flush(cf); |
553adfd9 | 3232 | } |
c8799fc4 YZ |
3233 | |
3234 | if (wake_ci) | |
3235 | wake_up_all(&ci->i_cap_wq); | |
3236 | if (wake_mdsc) | |
3237 | wake_up_all(&mdsc->cap_flushing_wq); | |
afcdaea3 | 3238 | if (drop) |
a8599bd8 SW |
3239 | iput(inode); |
3240 | } | |
3241 | ||
3242 | /* | |
3243 | * Handle FLUSHSNAP_ACK. MDS has flushed snap data to disk and we can | |
3244 | * throw away our cap_snap. | |
3245 | * | |
3246 | * Caller hold s_mutex. | |
3247 | */ | |
6df058c0 | 3248 | static void handle_cap_flushsnap_ack(struct inode *inode, u64 flush_tid, |
a8599bd8 SW |
3249 | struct ceph_mds_caps *m, |
3250 | struct ceph_mds_session *session) | |
3251 | { | |
3252 | struct ceph_inode_info *ci = ceph_inode(inode); | |
affbc19a | 3253 | struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc; |
a8599bd8 | 3254 | u64 follows = le64_to_cpu(m->snap_follows); |
a8599bd8 | 3255 | struct ceph_cap_snap *capsnap; |
c8799fc4 YZ |
3256 | bool flushed = false; |
3257 | bool wake_ci = false; | |
3258 | bool wake_mdsc = false; | |
a8599bd8 SW |
3259 | |
3260 | dout("handle_cap_flushsnap_ack inode %p ci %p mds%d follows %lld\n", | |
3261 | inode, ci, session->s_mds, follows); | |
3262 | ||
be655596 | 3263 | spin_lock(&ci->i_ceph_lock); |
a8599bd8 SW |
3264 | list_for_each_entry(capsnap, &ci->i_cap_snaps, ci_item) { |
3265 | if (capsnap->follows == follows) { | |
0e294387 | 3266 | if (capsnap->cap_flush.tid != flush_tid) { |
a8599bd8 SW |
3267 | dout(" cap_snap %p follows %lld tid %lld !=" |
3268 | " %lld\n", capsnap, follows, | |
0e294387 | 3269 | flush_tid, capsnap->cap_flush.tid); |
a8599bd8 SW |
3270 | break; |
3271 | } | |
c8799fc4 | 3272 | flushed = true; |
a8599bd8 SW |
3273 | break; |
3274 | } else { | |
3275 | dout(" skipping cap_snap %p follows %lld\n", | |
3276 | capsnap, capsnap->follows); | |
3277 | } | |
3278 | } | |
0e294387 | 3279 | if (flushed) { |
0e294387 YZ |
3280 | WARN_ON(capsnap->dirty_pages || capsnap->writing); |
3281 | dout(" removing %p cap_snap %p follows %lld\n", | |
3282 | inode, capsnap, follows); | |
3283 | list_del(&capsnap->ci_item); | |
c8799fc4 YZ |
3284 | if (__finish_cap_flush(NULL, ci, &capsnap->cap_flush)) |
3285 | wake_ci = true; | |
0e294387 YZ |
3286 | |
3287 | spin_lock(&mdsc->cap_dirty_lock); | |
3288 | ||
3289 | if (list_empty(&ci->i_cap_flush_list)) | |
3290 | list_del_init(&ci->i_flushing_item); | |
3291 | ||
c8799fc4 YZ |
3292 | if (__finish_cap_flush(mdsc, NULL, &capsnap->cap_flush)) |
3293 | wake_mdsc = true; | |
0e294387 YZ |
3294 | |
3295 | spin_unlock(&mdsc->cap_dirty_lock); | |
0e294387 | 3296 | } |
be655596 | 3297 | spin_unlock(&ci->i_ceph_lock); |
0e294387 YZ |
3298 | if (flushed) { |
3299 | ceph_put_snap_context(capsnap->context); | |
3300 | ceph_put_cap_snap(capsnap); | |
c8799fc4 YZ |
3301 | if (wake_ci) |
3302 | wake_up_all(&ci->i_cap_wq); | |
3303 | if (wake_mdsc) | |
3304 | wake_up_all(&mdsc->cap_flushing_wq); | |
a8599bd8 | 3305 | iput(inode); |
0e294387 | 3306 | } |
a8599bd8 SW |
3307 | } |
3308 | ||
3309 | /* | |
3310 | * Handle TRUNC from MDS, indicating file truncation. | |
3311 | * | |
3312 | * caller hold s_mutex. | |
3313 | */ | |
3314 | static void handle_cap_trunc(struct inode *inode, | |
3315 | struct ceph_mds_caps *trunc, | |
3316 | struct ceph_mds_session *session) | |
be655596 | 3317 | __releases(ci->i_ceph_lock) |
a8599bd8 SW |
3318 | { |
3319 | struct ceph_inode_info *ci = ceph_inode(inode); | |
3320 | int mds = session->s_mds; | |
3321 | int seq = le32_to_cpu(trunc->seq); | |
3322 | u32 truncate_seq = le32_to_cpu(trunc->truncate_seq); | |
3323 | u64 truncate_size = le64_to_cpu(trunc->truncate_size); | |
3324 | u64 size = le64_to_cpu(trunc->size); | |
3325 | int implemented = 0; | |
3326 | int dirty = __ceph_caps_dirty(ci); | |
3327 | int issued = __ceph_caps_issued(ceph_inode(inode), &implemented); | |
3328 | int queue_trunc = 0; | |
3329 | ||
3330 | issued |= implemented | dirty; | |
3331 | ||
3332 | dout("handle_cap_trunc inode %p mds%d seq %d to %lld seq %d\n", | |
3333 | inode, mds, seq, truncate_size, truncate_seq); | |
3334 | queue_trunc = ceph_fill_file_size(inode, issued, | |
3335 | truncate_seq, truncate_size, size); | |
be655596 | 3336 | spin_unlock(&ci->i_ceph_lock); |
a8599bd8 | 3337 | |
14649758 | 3338 | if (queue_trunc) |
3c6f6b79 | 3339 | ceph_queue_vmtruncate(inode); |
a8599bd8 SW |
3340 | } |
3341 | ||
3342 | /* | |
3343 | * Handle EXPORT from MDS. Cap is being migrated _from_ this mds to a | |
3344 | * different one. If we are the most recent migration we've seen (as | |
3345 | * indicated by mseq), make note of the migrating cap bits for the | |
3346 | * duration (until we see the corresponding IMPORT). | |
3347 | * | |
3348 | * caller holds s_mutex | |
3349 | */ | |
3350 | static void handle_cap_export(struct inode *inode, struct ceph_mds_caps *ex, | |
11df2dfb YZ |
3351 | struct ceph_mds_cap_peer *ph, |
3352 | struct ceph_mds_session *session) | |
a8599bd8 | 3353 | { |
db354052 | 3354 | struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc; |
11df2dfb | 3355 | struct ceph_mds_session *tsession = NULL; |
d9df2783 | 3356 | struct ceph_cap *cap, *tcap, *new_cap = NULL; |
a8599bd8 | 3357 | struct ceph_inode_info *ci = ceph_inode(inode); |
11df2dfb | 3358 | u64 t_cap_id; |
a8599bd8 | 3359 | unsigned mseq = le32_to_cpu(ex->migrate_seq); |
11df2dfb YZ |
3360 | unsigned t_seq, t_mseq; |
3361 | int target, issued; | |
3362 | int mds = session->s_mds; | |
a8599bd8 | 3363 | |
11df2dfb YZ |
3364 | if (ph) { |
3365 | t_cap_id = le64_to_cpu(ph->cap_id); | |
3366 | t_seq = le32_to_cpu(ph->seq); | |
3367 | t_mseq = le32_to_cpu(ph->mseq); | |
3368 | target = le32_to_cpu(ph->mds); | |
3369 | } else { | |
3370 | t_cap_id = t_seq = t_mseq = 0; | |
3371 | target = -1; | |
3372 | } | |
a8599bd8 | 3373 | |
11df2dfb YZ |
3374 | dout("handle_cap_export inode %p ci %p mds%d mseq %d target %d\n", |
3375 | inode, ci, mds, mseq, target); | |
3376 | retry: | |
be655596 | 3377 | spin_lock(&ci->i_ceph_lock); |
11df2dfb | 3378 | cap = __get_cap_for_mds(ci, mds); |
ca665e02 | 3379 | if (!cap || cap->cap_id != le64_to_cpu(ex->cap_id)) |
11df2dfb | 3380 | goto out_unlock; |
a8599bd8 | 3381 | |
11df2dfb YZ |
3382 | if (target < 0) { |
3383 | __ceph_remove_cap(cap, false); | |
77310320 YZ |
3384 | if (!ci->i_auth_cap) |
3385 | ci->i_ceph_flags |= CEPH_I_CAP_DROPPED; | |
11df2dfb | 3386 | goto out_unlock; |
a8599bd8 SW |
3387 | } |
3388 | ||
11df2dfb YZ |
3389 | /* |
3390 | * now we know we haven't received the cap import message yet | |
3391 | * because the exported cap still exist. | |
3392 | */ | |
db354052 | 3393 | |
11df2dfb YZ |
3394 | issued = cap->issued; |
3395 | WARN_ON(issued != cap->implemented); | |
3396 | ||
3397 | tcap = __get_cap_for_mds(ci, target); | |
3398 | if (tcap) { | |
3399 | /* already have caps from the target */ | |
3400 | if (tcap->cap_id != t_cap_id || | |
3401 | ceph_seq_cmp(tcap->seq, t_seq) < 0) { | |
3402 | dout(" updating import cap %p mds%d\n", tcap, target); | |
3403 | tcap->cap_id = t_cap_id; | |
3404 | tcap->seq = t_seq - 1; | |
3405 | tcap->issue_seq = t_seq - 1; | |
3406 | tcap->mseq = t_mseq; | |
3407 | tcap->issued |= issued; | |
3408 | tcap->implemented |= issued; | |
3409 | if (cap == ci->i_auth_cap) | |
3410 | ci->i_auth_cap = tcap; | |
00f06cba | 3411 | |
0e294387 YZ |
3412 | if (!list_empty(&ci->i_cap_flush_list) && |
3413 | ci->i_auth_cap == tcap) { | |
11df2dfb YZ |
3414 | spin_lock(&mdsc->cap_dirty_lock); |
3415 | list_move_tail(&ci->i_flushing_item, | |
3416 | &tcap->session->s_cap_flushing); | |
3417 | spin_unlock(&mdsc->cap_dirty_lock); | |
db354052 | 3418 | } |
a8599bd8 | 3419 | } |
a096b09a | 3420 | __ceph_remove_cap(cap, false); |
11df2dfb | 3421 | goto out_unlock; |
d9df2783 | 3422 | } else if (tsession) { |
11df2dfb | 3423 | /* add placeholder for the export tagert */ |
d9df2783 | 3424 | int flag = (cap == ci->i_auth_cap) ? CEPH_CAP_FLAG_AUTH : 0; |
00f06cba | 3425 | tcap = new_cap; |
11df2dfb | 3426 | ceph_add_cap(inode, tsession, t_cap_id, -1, issued, 0, |
d9df2783 YZ |
3427 | t_seq - 1, t_mseq, (u64)-1, flag, &new_cap); |
3428 | ||
00f06cba YZ |
3429 | if (!list_empty(&ci->i_cap_flush_list) && |
3430 | ci->i_auth_cap == tcap) { | |
3431 | spin_lock(&mdsc->cap_dirty_lock); | |
3432 | list_move_tail(&ci->i_flushing_item, | |
3433 | &tcap->session->s_cap_flushing); | |
3434 | spin_unlock(&mdsc->cap_dirty_lock); | |
3435 | } | |
3436 | ||
d9df2783 YZ |
3437 | __ceph_remove_cap(cap, false); |
3438 | goto out_unlock; | |
a8599bd8 SW |
3439 | } |
3440 | ||
be655596 | 3441 | spin_unlock(&ci->i_ceph_lock); |
11df2dfb YZ |
3442 | mutex_unlock(&session->s_mutex); |
3443 | ||
3444 | /* open target session */ | |
3445 | tsession = ceph_mdsc_open_export_target_session(mdsc, target); | |
3446 | if (!IS_ERR(tsession)) { | |
3447 | if (mds > target) { | |
3448 | mutex_lock(&session->s_mutex); | |
3449 | mutex_lock_nested(&tsession->s_mutex, | |
3450 | SINGLE_DEPTH_NESTING); | |
3451 | } else { | |
3452 | mutex_lock(&tsession->s_mutex); | |
3453 | mutex_lock_nested(&session->s_mutex, | |
3454 | SINGLE_DEPTH_NESTING); | |
3455 | } | |
d9df2783 | 3456 | new_cap = ceph_get_cap(mdsc, NULL); |
11df2dfb YZ |
3457 | } else { |
3458 | WARN_ON(1); | |
3459 | tsession = NULL; | |
3460 | target = -1; | |
3461 | } | |
3462 | goto retry; | |
3463 | ||
3464 | out_unlock: | |
3465 | spin_unlock(&ci->i_ceph_lock); | |
3466 | mutex_unlock(&session->s_mutex); | |
3467 | if (tsession) { | |
3468 | mutex_unlock(&tsession->s_mutex); | |
3469 | ceph_put_mds_session(tsession); | |
3470 | } | |
d9df2783 YZ |
3471 | if (new_cap) |
3472 | ceph_put_cap(mdsc, new_cap); | |
a8599bd8 SW |
3473 | } |
3474 | ||
3475 | /* | |
2cd698be | 3476 | * Handle cap IMPORT. |
a8599bd8 | 3477 | * |
2cd698be | 3478 | * caller holds s_mutex. acquires i_ceph_lock |
a8599bd8 SW |
3479 | */ |
3480 | static void handle_cap_import(struct ceph_mds_client *mdsc, | |
3481 | struct inode *inode, struct ceph_mds_caps *im, | |
4ee6a914 | 3482 | struct ceph_mds_cap_peer *ph, |
a8599bd8 | 3483 | struct ceph_mds_session *session, |
2cd698be YZ |
3484 | struct ceph_cap **target_cap, int *old_issued) |
3485 | __acquires(ci->i_ceph_lock) | |
a8599bd8 SW |
3486 | { |
3487 | struct ceph_inode_info *ci = ceph_inode(inode); | |
2cd698be | 3488 | struct ceph_cap *cap, *ocap, *new_cap = NULL; |
a8599bd8 | 3489 | int mds = session->s_mds; |
2cd698be YZ |
3490 | int issued; |
3491 | unsigned caps = le32_to_cpu(im->caps); | |
a8599bd8 SW |
3492 | unsigned wanted = le32_to_cpu(im->wanted); |
3493 | unsigned seq = le32_to_cpu(im->seq); | |
3494 | unsigned mseq = le32_to_cpu(im->migrate_seq); | |
3495 | u64 realmino = le64_to_cpu(im->realm); | |
3496 | u64 cap_id = le64_to_cpu(im->cap_id); | |
4ee6a914 YZ |
3497 | u64 p_cap_id; |
3498 | int peer; | |
a8599bd8 | 3499 | |
4ee6a914 YZ |
3500 | if (ph) { |
3501 | p_cap_id = le64_to_cpu(ph->cap_id); | |
3502 | peer = le32_to_cpu(ph->mds); | |
3503 | } else { | |
3504 | p_cap_id = 0; | |
3505 | peer = -1; | |
3506 | } | |
db354052 | 3507 | |
4ee6a914 YZ |
3508 | dout("handle_cap_import inode %p ci %p mds%d mseq %d peer %d\n", |
3509 | inode, ci, mds, mseq, peer); | |
3510 | ||
d9df2783 | 3511 | retry: |
4ee6a914 | 3512 | spin_lock(&ci->i_ceph_lock); |
d9df2783 YZ |
3513 | cap = __get_cap_for_mds(ci, mds); |
3514 | if (!cap) { | |
3515 | if (!new_cap) { | |
3516 | spin_unlock(&ci->i_ceph_lock); | |
3517 | new_cap = ceph_get_cap(mdsc, NULL); | |
3518 | goto retry; | |
3519 | } | |
2cd698be YZ |
3520 | cap = new_cap; |
3521 | } else { | |
3522 | if (new_cap) { | |
3523 | ceph_put_cap(mdsc, new_cap); | |
3524 | new_cap = NULL; | |
3525 | } | |
d9df2783 YZ |
3526 | } |
3527 | ||
2cd698be YZ |
3528 | __ceph_caps_issued(ci, &issued); |
3529 | issued |= __ceph_caps_dirty(ci); | |
3530 | ||
3531 | ceph_add_cap(inode, session, cap_id, -1, caps, wanted, seq, mseq, | |
d9df2783 YZ |
3532 | realmino, CEPH_CAP_FLAG_AUTH, &new_cap); |
3533 | ||
2cd698be YZ |
3534 | ocap = peer >= 0 ? __get_cap_for_mds(ci, peer) : NULL; |
3535 | if (ocap && ocap->cap_id == p_cap_id) { | |
4ee6a914 | 3536 | dout(" remove export cap %p mds%d flags %d\n", |
2cd698be | 3537 | ocap, peer, ph->flags); |
4ee6a914 | 3538 | if ((ph->flags & CEPH_CAP_FLAG_AUTH) && |
2cd698be YZ |
3539 | (ocap->seq != le32_to_cpu(ph->seq) || |
3540 | ocap->mseq != le32_to_cpu(ph->mseq))) { | |
4ee6a914 YZ |
3541 | pr_err("handle_cap_import: mismatched seq/mseq: " |
3542 | "ino (%llx.%llx) mds%d seq %d mseq %d " | |
3543 | "importer mds%d has peer seq %d mseq %d\n", | |
2cd698be YZ |
3544 | ceph_vinop(inode), peer, ocap->seq, |
3545 | ocap->mseq, mds, le32_to_cpu(ph->seq), | |
4ee6a914 | 3546 | le32_to_cpu(ph->mseq)); |
db354052 | 3547 | } |
2cd698be | 3548 | __ceph_remove_cap(ocap, (ph->flags & CEPH_CAP_FLAG_RELEASE)); |
a8599bd8 SW |
3549 | } |
3550 | ||
4ee6a914 YZ |
3551 | /* make sure we re-request max_size, if necessary */ |
3552 | ci->i_wanted_max_size = 0; | |
3553 | ci->i_requested_max_size = 0; | |
d9df2783 | 3554 | |
2cd698be YZ |
3555 | *old_issued = issued; |
3556 | *target_cap = cap; | |
a8599bd8 SW |
3557 | } |
3558 | ||
3559 | /* | |
3560 | * Handle a caps message from the MDS. | |
3561 | * | |
3562 | * Identify the appropriate session, inode, and call the right handler | |
3563 | * based on the cap op. | |
3564 | */ | |
3565 | void ceph_handle_caps(struct ceph_mds_session *session, | |
3566 | struct ceph_msg *msg) | |
3567 | { | |
3568 | struct ceph_mds_client *mdsc = session->s_mdsc; | |
3d14c5d2 | 3569 | struct super_block *sb = mdsc->fsc->sb; |
a8599bd8 | 3570 | struct inode *inode; |
be655596 | 3571 | struct ceph_inode_info *ci; |
a8599bd8 SW |
3572 | struct ceph_cap *cap; |
3573 | struct ceph_mds_caps *h; | |
4ee6a914 | 3574 | struct ceph_mds_cap_peer *peer = NULL; |
779fe0fb YZ |
3575 | struct ceph_snap_realm *realm = NULL; |
3576 | struct ceph_string *pool_ns = NULL; | |
2600d2dd | 3577 | int mds = session->s_mds; |
2cd698be | 3578 | int op, issued; |
3d7ded4d | 3579 | u32 seq, mseq; |
a8599bd8 | 3580 | struct ceph_vino vino; |
6df058c0 | 3581 | u64 tid; |
fb01d1f8 YZ |
3582 | u64 inline_version = 0; |
3583 | void *inline_data = NULL; | |
3584 | u32 inline_len = 0; | |
70edb55b | 3585 | void *snaptrace; |
ce1fbc8d | 3586 | size_t snaptrace_len; |
fb01d1f8 | 3587 | void *p, *end; |
a8599bd8 SW |
3588 | |
3589 | dout("handle_caps from mds%d\n", mds); | |
3590 | ||
3591 | /* decode */ | |
4ee6a914 | 3592 | end = msg->front.iov_base + msg->front.iov_len; |
6df058c0 | 3593 | tid = le64_to_cpu(msg->hdr.tid); |
a8599bd8 SW |
3594 | if (msg->front.iov_len < sizeof(*h)) |
3595 | goto bad; | |
3596 | h = msg->front.iov_base; | |
3597 | op = le32_to_cpu(h->op); | |
3598 | vino.ino = le64_to_cpu(h->ino); | |
3599 | vino.snap = CEPH_NOSNAP; | |
a8599bd8 | 3600 | seq = le32_to_cpu(h->seq); |
3d7ded4d | 3601 | mseq = le32_to_cpu(h->migrate_seq); |
a8599bd8 | 3602 | |
ce1fbc8d SW |
3603 | snaptrace = h + 1; |
3604 | snaptrace_len = le32_to_cpu(h->snap_trace_len); | |
fb01d1f8 | 3605 | p = snaptrace + snaptrace_len; |
ce1fbc8d SW |
3606 | |
3607 | if (le16_to_cpu(msg->hdr.version) >= 2) { | |
fb01d1f8 | 3608 | u32 flock_len; |
ce1fbc8d | 3609 | ceph_decode_32_safe(&p, end, flock_len, bad); |
4ee6a914 YZ |
3610 | if (p + flock_len > end) |
3611 | goto bad; | |
fb01d1f8 | 3612 | p += flock_len; |
ce1fbc8d SW |
3613 | } |
3614 | ||
4ee6a914 YZ |
3615 | if (le16_to_cpu(msg->hdr.version) >= 3) { |
3616 | if (op == CEPH_CAP_OP_IMPORT) { | |
4ee6a914 YZ |
3617 | if (p + sizeof(*peer) > end) |
3618 | goto bad; | |
3619 | peer = p; | |
fb01d1f8 | 3620 | p += sizeof(*peer); |
11df2dfb YZ |
3621 | } else if (op == CEPH_CAP_OP_EXPORT) { |
3622 | /* recorded in unused fields */ | |
3623 | peer = (void *)&h->size; | |
4ee6a914 YZ |
3624 | } |
3625 | } | |
3626 | ||
fb01d1f8 YZ |
3627 | if (le16_to_cpu(msg->hdr.version) >= 4) { |
3628 | ceph_decode_64_safe(&p, end, inline_version, bad); | |
3629 | ceph_decode_32_safe(&p, end, inline_len, bad); | |
3630 | if (p + inline_len > end) | |
3631 | goto bad; | |
3632 | inline_data = p; | |
3633 | p += inline_len; | |
3634 | } | |
3635 | ||
5ea5c5e0 YZ |
3636 | if (le16_to_cpu(msg->hdr.version) >= 8) { |
3637 | u64 flush_tid; | |
3638 | u32 caller_uid, caller_gid; | |
3639 | u32 osd_epoch_barrier; | |
779fe0fb | 3640 | u32 pool_ns_len; |
5ea5c5e0 YZ |
3641 | /* version >= 5 */ |
3642 | ceph_decode_32_safe(&p, end, osd_epoch_barrier, bad); | |
3643 | /* version >= 6 */ | |
3644 | ceph_decode_64_safe(&p, end, flush_tid, bad); | |
3645 | /* version >= 7 */ | |
3646 | ceph_decode_32_safe(&p, end, caller_uid, bad); | |
3647 | ceph_decode_32_safe(&p, end, caller_gid, bad); | |
3648 | /* version >= 8 */ | |
3649 | ceph_decode_32_safe(&p, end, pool_ns_len, bad); | |
779fe0fb YZ |
3650 | if (pool_ns_len > 0) { |
3651 | ceph_decode_need(&p, end, pool_ns_len, bad); | |
3652 | pool_ns = ceph_find_or_create_string(p, pool_ns_len); | |
3653 | p += pool_ns_len; | |
3654 | } | |
5ea5c5e0 YZ |
3655 | } |
3656 | ||
6cd3bcad YZ |
3657 | /* lookup ino */ |
3658 | inode = ceph_find_inode(sb, vino); | |
3659 | ci = ceph_inode(inode); | |
3660 | dout(" op %s ino %llx.%llx inode %p\n", ceph_cap_op_name(op), vino.ino, | |
3661 | vino.snap, inode); | |
3662 | ||
a8599bd8 SW |
3663 | mutex_lock(&session->s_mutex); |
3664 | session->s_seq++; | |
3665 | dout(" mds%d seq %lld cap seq %u\n", session->s_mds, session->s_seq, | |
3666 | (unsigned)seq); | |
3667 | ||
a8599bd8 SW |
3668 | if (!inode) { |
3669 | dout(" i don't have ino %llx\n", vino.ino); | |
3d7ded4d | 3670 | |
a096b09a | 3671 | if (op == CEPH_CAP_OP_IMPORT) { |
745a8e3b YZ |
3672 | cap = ceph_get_cap(mdsc, NULL); |
3673 | cap->cap_ino = vino.ino; | |
3674 | cap->queue_release = 1; | |
779fe0fb | 3675 | cap->cap_id = le64_to_cpu(h->cap_id); |
745a8e3b YZ |
3676 | cap->mseq = mseq; |
3677 | cap->seq = seq; | |
dc24de82 | 3678 | cap->issue_seq = seq; |
a096b09a | 3679 | spin_lock(&session->s_cap_lock); |
745a8e3b YZ |
3680 | list_add_tail(&cap->session_caps, |
3681 | &session->s_cap_releases); | |
3682 | session->s_num_cap_releases++; | |
a096b09a YZ |
3683 | spin_unlock(&session->s_cap_lock); |
3684 | } | |
21b559de | 3685 | goto flush_cap_releases; |
a8599bd8 SW |
3686 | } |
3687 | ||
3688 | /* these will work even if we don't have a cap yet */ | |
3689 | switch (op) { | |
3690 | case CEPH_CAP_OP_FLUSHSNAP_ACK: | |
6df058c0 | 3691 | handle_cap_flushsnap_ack(inode, tid, h, session); |
a8599bd8 SW |
3692 | goto done; |
3693 | ||
3694 | case CEPH_CAP_OP_EXPORT: | |
11df2dfb YZ |
3695 | handle_cap_export(inode, h, peer, session); |
3696 | goto done_unlocked; | |
a8599bd8 SW |
3697 | |
3698 | case CEPH_CAP_OP_IMPORT: | |
982d6011 YZ |
3699 | realm = NULL; |
3700 | if (snaptrace_len) { | |
3701 | down_write(&mdsc->snap_rwsem); | |
3702 | ceph_update_snap_trace(mdsc, snaptrace, | |
3703 | snaptrace + snaptrace_len, | |
3704 | false, &realm); | |
3705 | downgrade_write(&mdsc->snap_rwsem); | |
3706 | } else { | |
3707 | down_read(&mdsc->snap_rwsem); | |
3708 | } | |
4ee6a914 | 3709 | handle_cap_import(mdsc, inode, h, peer, session, |
2cd698be | 3710 | &cap, &issued); |
779fe0fb | 3711 | handle_cap_grant(mdsc, inode, h, &pool_ns, |
fb01d1f8 | 3712 | inline_version, inline_data, inline_len, |
779fe0fb | 3713 | msg->middle, session, cap, issued); |
982d6011 YZ |
3714 | if (realm) |
3715 | ceph_put_snap_realm(mdsc, realm); | |
2cd698be | 3716 | goto done_unlocked; |
a8599bd8 SW |
3717 | } |
3718 | ||
3719 | /* the rest require a cap */ | |
be655596 | 3720 | spin_lock(&ci->i_ceph_lock); |
a8599bd8 SW |
3721 | cap = __get_cap_for_mds(ceph_inode(inode), mds); |
3722 | if (!cap) { | |
9dbd412f | 3723 | dout(" no cap on %p ino %llx.%llx from mds%d\n", |
a8599bd8 | 3724 | inode, ceph_ino(inode), ceph_snap(inode), mds); |
be655596 | 3725 | spin_unlock(&ci->i_ceph_lock); |
21b559de | 3726 | goto flush_cap_releases; |
a8599bd8 SW |
3727 | } |
3728 | ||
be655596 | 3729 | /* note that each of these drops i_ceph_lock for us */ |
a8599bd8 SW |
3730 | switch (op) { |
3731 | case CEPH_CAP_OP_REVOKE: | |
3732 | case CEPH_CAP_OP_GRANT: | |
2cd698be YZ |
3733 | __ceph_caps_issued(ci, &issued); |
3734 | issued |= __ceph_caps_dirty(ci); | |
779fe0fb | 3735 | handle_cap_grant(mdsc, inode, h, &pool_ns, |
fb01d1f8 | 3736 | inline_version, inline_data, inline_len, |
779fe0fb | 3737 | msg->middle, session, cap, issued); |
15637c8b | 3738 | goto done_unlocked; |
a8599bd8 SW |
3739 | |
3740 | case CEPH_CAP_OP_FLUSH_ACK: | |
6df058c0 | 3741 | handle_cap_flush_ack(inode, tid, h, session, cap); |
a8599bd8 SW |
3742 | break; |
3743 | ||
3744 | case CEPH_CAP_OP_TRUNC: | |
3745 | handle_cap_trunc(inode, h, session); | |
3746 | break; | |
3747 | ||
3748 | default: | |
be655596 | 3749 | spin_unlock(&ci->i_ceph_lock); |
a8599bd8 SW |
3750 | pr_err("ceph_handle_caps: unknown cap op %d %s\n", op, |
3751 | ceph_cap_op_name(op)); | |
3752 | } | |
3753 | ||
21b559de GF |
3754 | goto done; |
3755 | ||
3756 | flush_cap_releases: | |
3757 | /* | |
745a8e3b | 3758 | * send any cap release message to try to move things |
21b559de GF |
3759 | * along for the mds (who clearly thinks we still have this |
3760 | * cap). | |
3761 | */ | |
21b559de GF |
3762 | ceph_send_cap_releases(mdsc, session); |
3763 | ||
a8599bd8 | 3764 | done: |
15637c8b SW |
3765 | mutex_unlock(&session->s_mutex); |
3766 | done_unlocked: | |
e96a650a | 3767 | iput(inode); |
779fe0fb | 3768 | ceph_put_string(pool_ns); |
a8599bd8 SW |
3769 | return; |
3770 | ||
3771 | bad: | |
3772 | pr_err("ceph_handle_caps: corrupt message\n"); | |
9ec7cab1 | 3773 | ceph_msg_dump(msg); |
a8599bd8 SW |
3774 | return; |
3775 | } | |
3776 | ||
3777 | /* | |
3778 | * Delayed work handler to process end of delayed cap release LRU list. | |
3779 | */ | |
afcdaea3 | 3780 | void ceph_check_delayed_caps(struct ceph_mds_client *mdsc) |
a8599bd8 SW |
3781 | { |
3782 | struct ceph_inode_info *ci; | |
3783 | int flags = CHECK_CAPS_NODELAY; | |
3784 | ||
a8599bd8 SW |
3785 | dout("check_delayed_caps\n"); |
3786 | while (1) { | |
3787 | spin_lock(&mdsc->cap_delay_lock); | |
3788 | if (list_empty(&mdsc->cap_delay_list)) | |
3789 | break; | |
3790 | ci = list_first_entry(&mdsc->cap_delay_list, | |
3791 | struct ceph_inode_info, | |
3792 | i_cap_delay_list); | |
3793 | if ((ci->i_ceph_flags & CEPH_I_FLUSH) == 0 && | |
3794 | time_before(jiffies, ci->i_hold_caps_max)) | |
3795 | break; | |
3796 | list_del_init(&ci->i_cap_delay_list); | |
3797 | spin_unlock(&mdsc->cap_delay_lock); | |
3798 | dout("check_delayed_caps on %p\n", &ci->vfs_inode); | |
3799 | ceph_check_caps(ci, flags, NULL); | |
3800 | } | |
3801 | spin_unlock(&mdsc->cap_delay_lock); | |
3802 | } | |
3803 | ||
afcdaea3 SW |
3804 | /* |
3805 | * Flush all dirty caps to the mds | |
3806 | */ | |
3807 | void ceph_flush_dirty_caps(struct ceph_mds_client *mdsc) | |
3808 | { | |
db354052 SW |
3809 | struct ceph_inode_info *ci; |
3810 | struct inode *inode; | |
afcdaea3 SW |
3811 | |
3812 | dout("flush_dirty_caps\n"); | |
3813 | spin_lock(&mdsc->cap_dirty_lock); | |
db354052 SW |
3814 | while (!list_empty(&mdsc->cap_dirty)) { |
3815 | ci = list_first_entry(&mdsc->cap_dirty, struct ceph_inode_info, | |
3816 | i_dirty_item); | |
70b666c3 SW |
3817 | inode = &ci->vfs_inode; |
3818 | ihold(inode); | |
db354052 | 3819 | dout("flush_dirty_caps %p\n", inode); |
afcdaea3 | 3820 | spin_unlock(&mdsc->cap_dirty_lock); |
70b666c3 SW |
3821 | ceph_check_caps(ci, CHECK_CAPS_NODELAY|CHECK_CAPS_FLUSH, NULL); |
3822 | iput(inode); | |
afcdaea3 SW |
3823 | spin_lock(&mdsc->cap_dirty_lock); |
3824 | } | |
3825 | spin_unlock(&mdsc->cap_dirty_lock); | |
db354052 | 3826 | dout("flush_dirty_caps done\n"); |
afcdaea3 SW |
3827 | } |
3828 | ||
774a6a11 YZ |
3829 | void __ceph_get_fmode(struct ceph_inode_info *ci, int fmode) |
3830 | { | |
3831 | int i; | |
3832 | int bits = (fmode << 1) | 1; | |
3833 | for (i = 0; i < CEPH_FILE_MODE_BITS; i++) { | |
3834 | if (bits & (1 << i)) | |
3835 | ci->i_nr_by_mode[i]++; | |
3836 | } | |
3837 | } | |
3838 | ||
a8599bd8 SW |
3839 | /* |
3840 | * Drop open file reference. If we were the last open file, | |
3841 | * we may need to release capabilities to the MDS (or schedule | |
3842 | * their delayed release). | |
3843 | */ | |
3844 | void ceph_put_fmode(struct ceph_inode_info *ci, int fmode) | |
3845 | { | |
774a6a11 YZ |
3846 | int i, last = 0; |
3847 | int bits = (fmode << 1) | 1; | |
be655596 | 3848 | spin_lock(&ci->i_ceph_lock); |
774a6a11 YZ |
3849 | for (i = 0; i < CEPH_FILE_MODE_BITS; i++) { |
3850 | if (bits & (1 << i)) { | |
3851 | BUG_ON(ci->i_nr_by_mode[i] == 0); | |
3852 | if (--ci->i_nr_by_mode[i] == 0) | |
3853 | last++; | |
3854 | } | |
3855 | } | |
3856 | dout("put_fmode %p fmode %d {%d,%d,%d,%d}\n", | |
3857 | &ci->vfs_inode, fmode, | |
3858 | ci->i_nr_by_mode[0], ci->i_nr_by_mode[1], | |
3859 | ci->i_nr_by_mode[2], ci->i_nr_by_mode[3]); | |
be655596 | 3860 | spin_unlock(&ci->i_ceph_lock); |
a8599bd8 SW |
3861 | |
3862 | if (last && ci->i_vino.snap == CEPH_NOSNAP) | |
3863 | ceph_check_caps(ci, 0, NULL); | |
3864 | } | |
3865 | ||
3866 | /* | |
3867 | * Helpers for embedding cap and dentry lease releases into mds | |
3868 | * requests. | |
3869 | * | |
3870 | * @force is used by dentry_release (below) to force inclusion of a | |
3871 | * record for the directory inode, even when there aren't any caps to | |
3872 | * drop. | |
3873 | */ | |
3874 | int ceph_encode_inode_release(void **p, struct inode *inode, | |
3875 | int mds, int drop, int unless, int force) | |
3876 | { | |
3877 | struct ceph_inode_info *ci = ceph_inode(inode); | |
3878 | struct ceph_cap *cap; | |
3879 | struct ceph_mds_request_release *rel = *p; | |
ec97f88b | 3880 | int used, dirty; |
a8599bd8 | 3881 | int ret = 0; |
a8599bd8 | 3882 | |
be655596 | 3883 | spin_lock(&ci->i_ceph_lock); |
916623da | 3884 | used = __ceph_caps_used(ci); |
ec97f88b | 3885 | dirty = __ceph_caps_dirty(ci); |
916623da | 3886 | |
ec97f88b SW |
3887 | dout("encode_inode_release %p mds%d used|dirty %s drop %s unless %s\n", |
3888 | inode, mds, ceph_cap_string(used|dirty), ceph_cap_string(drop), | |
916623da SW |
3889 | ceph_cap_string(unless)); |
3890 | ||
ec97f88b SW |
3891 | /* only drop unused, clean caps */ |
3892 | drop &= ~(used | dirty); | |
916623da | 3893 | |
a8599bd8 SW |
3894 | cap = __get_cap_for_mds(ci, mds); |
3895 | if (cap && __cap_is_valid(cap)) { | |
3896 | if (force || | |
3897 | ((cap->issued & drop) && | |
3898 | (cap->issued & unless) == 0)) { | |
3899 | if ((cap->issued & drop) && | |
3900 | (cap->issued & unless) == 0) { | |
bb137f84 YZ |
3901 | int wanted = __ceph_caps_wanted(ci); |
3902 | if ((ci->i_ceph_flags & CEPH_I_NODELAY) == 0) | |
3903 | wanted |= cap->mds_wanted; | |
3904 | dout("encode_inode_release %p cap %p " | |
3905 | "%s -> %s, wanted %s -> %s\n", inode, cap, | |
a8599bd8 | 3906 | ceph_cap_string(cap->issued), |
bb137f84 YZ |
3907 | ceph_cap_string(cap->issued & ~drop), |
3908 | ceph_cap_string(cap->mds_wanted), | |
3909 | ceph_cap_string(wanted)); | |
3910 | ||
a8599bd8 SW |
3911 | cap->issued &= ~drop; |
3912 | cap->implemented &= ~drop; | |
bb137f84 | 3913 | cap->mds_wanted = wanted; |
a8599bd8 SW |
3914 | } else { |
3915 | dout("encode_inode_release %p cap %p %s" | |
3916 | " (force)\n", inode, cap, | |
3917 | ceph_cap_string(cap->issued)); | |
3918 | } | |
3919 | ||
3920 | rel->ino = cpu_to_le64(ceph_ino(inode)); | |
3921 | rel->cap_id = cpu_to_le64(cap->cap_id); | |
3922 | rel->seq = cpu_to_le32(cap->seq); | |
08a0f24e | 3923 | rel->issue_seq = cpu_to_le32(cap->issue_seq); |
a8599bd8 | 3924 | rel->mseq = cpu_to_le32(cap->mseq); |
fd7b95cd | 3925 | rel->caps = cpu_to_le32(cap->implemented); |
a8599bd8 SW |
3926 | rel->wanted = cpu_to_le32(cap->mds_wanted); |
3927 | rel->dname_len = 0; | |
3928 | rel->dname_seq = 0; | |
3929 | *p += sizeof(*rel); | |
3930 | ret = 1; | |
3931 | } else { | |
3932 | dout("encode_inode_release %p cap %p %s\n", | |
3933 | inode, cap, ceph_cap_string(cap->issued)); | |
3934 | } | |
3935 | } | |
be655596 | 3936 | spin_unlock(&ci->i_ceph_lock); |
a8599bd8 SW |
3937 | return ret; |
3938 | } | |
3939 | ||
3940 | int ceph_encode_dentry_release(void **p, struct dentry *dentry, | |
ca6c8ae0 | 3941 | struct inode *dir, |
a8599bd8 SW |
3942 | int mds, int drop, int unless) |
3943 | { | |
ca6c8ae0 | 3944 | struct dentry *parent = NULL; |
a8599bd8 SW |
3945 | struct ceph_mds_request_release *rel = *p; |
3946 | struct ceph_dentry_info *di = ceph_dentry(dentry); | |
3947 | int force = 0; | |
3948 | int ret; | |
3949 | ||
3950 | /* | |
3951 | * force an record for the directory caps if we have a dentry lease. | |
be655596 | 3952 | * this is racy (can't take i_ceph_lock and d_lock together), but it |
a8599bd8 SW |
3953 | * doesn't have to be perfect; the mds will revoke anything we don't |
3954 | * release. | |
3955 | */ | |
3956 | spin_lock(&dentry->d_lock); | |
3957 | if (di->lease_session && di->lease_session->s_mds == mds) | |
3958 | force = 1; | |
ca6c8ae0 JL |
3959 | if (!dir) { |
3960 | parent = dget(dentry->d_parent); | |
3961 | dir = d_inode(parent); | |
3962 | } | |
a8599bd8 SW |
3963 | spin_unlock(&dentry->d_lock); |
3964 | ||
ca6c8ae0 | 3965 | ret = ceph_encode_inode_release(p, dir, mds, drop, unless, force); |
adf0d687 | 3966 | dput(parent); |
a8599bd8 SW |
3967 | |
3968 | spin_lock(&dentry->d_lock); | |
3969 | if (ret && di->lease_session && di->lease_session->s_mds == mds) { | |
3970 | dout("encode_dentry_release %p mds%d seq %d\n", | |
3971 | dentry, mds, (int)di->lease_seq); | |
3972 | rel->dname_len = cpu_to_le32(dentry->d_name.len); | |
3973 | memcpy(*p, dentry->d_name.name, dentry->d_name.len); | |
3974 | *p += dentry->d_name.len; | |
3975 | rel->dname_seq = cpu_to_le32(di->lease_seq); | |
1dadcce3 | 3976 | __ceph_mdsc_drop_dentry_lease(dentry); |
a8599bd8 SW |
3977 | } |
3978 | spin_unlock(&dentry->d_lock); | |
3979 | return ret; | |
3980 | } |