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1 | /* -*- mode: c; c-basic-offset: 8; -*- |
2 | * vim: noexpandtab sw=8 ts=8 sts=0: | |
3 | * | |
4 | * vote.c | |
5 | * | |
6 | * description here | |
7 | * | |
8 | * Copyright (C) 2003, 2004 Oracle. All rights reserved. | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or | |
11 | * modify it under the terms of the GNU General Public | |
12 | * License as published by the Free Software Foundation; either | |
13 | * version 2 of the License, or (at your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | * General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public | |
21 | * License along with this program; if not, write to the | |
22 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
23 | * Boston, MA 021110-1307, USA. | |
24 | */ | |
25 | ||
26 | #include <linux/types.h> | |
27 | #include <linux/slab.h> | |
28 | #include <linux/highmem.h> | |
29 | #include <linux/smp_lock.h> | |
30 | #include <linux/kthread.h> | |
31 | ||
32 | #include <cluster/heartbeat.h> | |
33 | #include <cluster/nodemanager.h> | |
34 | #include <cluster/tcp.h> | |
35 | ||
36 | #include <dlm/dlmapi.h> | |
37 | ||
38 | #define MLOG_MASK_PREFIX ML_VOTE | |
39 | #include <cluster/masklog.h> | |
40 | ||
41 | #include "ocfs2.h" | |
42 | ||
43 | #include "alloc.h" | |
44 | #include "dlmglue.h" | |
45 | #include "extent_map.h" | |
46 | #include "heartbeat.h" | |
47 | #include "inode.h" | |
48 | #include "journal.h" | |
49 | #include "slot_map.h" | |
50 | #include "vote.h" | |
51 | ||
52 | #include "buffer_head_io.h" | |
53 | ||
54 | #define OCFS2_MESSAGE_TYPE_VOTE (0x1) | |
55 | #define OCFS2_MESSAGE_TYPE_RESPONSE (0x2) | |
56 | struct ocfs2_msg_hdr | |
57 | { | |
58 | __be32 h_response_id; /* used to lookup message handle on sending | |
59 | * node. */ | |
60 | __be32 h_request; | |
61 | __be64 h_blkno; | |
62 | __be32 h_generation; | |
63 | __be32 h_node_num; /* node sending this particular message. */ | |
64 | }; | |
65 | ||
66 | /* OCFS2_MAX_FILENAME_LEN is 255 characters, but we want to align this | |
67 | * for the network. */ | |
68 | #define OCFS2_VOTE_FILENAME_LEN 256 | |
69 | struct ocfs2_vote_msg | |
70 | { | |
71 | struct ocfs2_msg_hdr v_hdr; | |
72 | union { | |
73 | __be32 v_generic1; | |
74 | __be32 v_orphaned_slot; /* Used during delete votes */ | |
75 | __be32 v_nlink; /* Used during unlink votes */ | |
76 | } md1; /* Message type dependant 1 */ | |
77 | __be32 v_unlink_namelen; | |
78 | __be64 v_unlink_parent; | |
79 | u8 v_unlink_dirent[OCFS2_VOTE_FILENAME_LEN]; | |
80 | }; | |
81 | ||
82 | /* Responses are given these values to maintain backwards | |
83 | * compatibility with older ocfs2 versions */ | |
84 | #define OCFS2_RESPONSE_OK (0) | |
85 | #define OCFS2_RESPONSE_BUSY (-16) | |
86 | #define OCFS2_RESPONSE_BAD_MSG (-22) | |
87 | ||
88 | struct ocfs2_response_msg | |
89 | { | |
90 | struct ocfs2_msg_hdr r_hdr; | |
91 | __be32 r_response; | |
92 | __be32 r_orphaned_slot; | |
93 | }; | |
94 | ||
95 | struct ocfs2_vote_work { | |
96 | struct list_head w_list; | |
97 | struct ocfs2_vote_msg w_msg; | |
98 | }; | |
99 | ||
100 | enum ocfs2_vote_request { | |
101 | OCFS2_VOTE_REQ_INVALID = 0, | |
102 | OCFS2_VOTE_REQ_DELETE, | |
103 | OCFS2_VOTE_REQ_UNLINK, | |
104 | OCFS2_VOTE_REQ_RENAME, | |
105 | OCFS2_VOTE_REQ_MOUNT, | |
106 | OCFS2_VOTE_REQ_UMOUNT, | |
107 | OCFS2_VOTE_REQ_LAST | |
108 | }; | |
109 | ||
110 | static inline int ocfs2_is_valid_vote_request(int request) | |
111 | { | |
112 | return OCFS2_VOTE_REQ_INVALID < request && | |
113 | request < OCFS2_VOTE_REQ_LAST; | |
114 | } | |
115 | ||
116 | typedef void (*ocfs2_net_response_callback)(void *priv, | |
117 | struct ocfs2_response_msg *resp); | |
118 | struct ocfs2_net_response_cb { | |
119 | ocfs2_net_response_callback rc_cb; | |
120 | void *rc_priv; | |
121 | }; | |
122 | ||
123 | struct ocfs2_net_wait_ctxt { | |
124 | struct list_head n_list; | |
125 | u32 n_response_id; | |
126 | wait_queue_head_t n_event; | |
127 | struct ocfs2_node_map n_node_map; | |
128 | int n_response; /* an agreggate response. 0 if | |
129 | * all nodes are go, < 0 on any | |
130 | * negative response from any | |
131 | * node or network error. */ | |
132 | struct ocfs2_net_response_cb *n_callback; | |
133 | }; | |
134 | ||
135 | static void ocfs2_process_mount_request(struct ocfs2_super *osb, | |
136 | unsigned int node_num) | |
137 | { | |
138 | mlog(0, "MOUNT vote from node %u\n", node_num); | |
139 | /* The other node only sends us this message when he has an EX | |
140 | * on the superblock, so our recovery threads (if having been | |
141 | * launched) are waiting on it.*/ | |
142 | ocfs2_recovery_map_clear(osb, node_num); | |
143 | ocfs2_node_map_set_bit(osb, &osb->mounted_map, node_num); | |
144 | ||
145 | /* We clear the umount map here because a node may have been | |
146 | * previously mounted, safely unmounted but never stopped | |
147 | * heartbeating - in which case we'd have a stale entry. */ | |
148 | ocfs2_node_map_clear_bit(osb, &osb->umount_map, node_num); | |
149 | } | |
150 | ||
151 | static void ocfs2_process_umount_request(struct ocfs2_super *osb, | |
152 | unsigned int node_num) | |
153 | { | |
154 | mlog(0, "UMOUNT vote from node %u\n", node_num); | |
155 | ocfs2_node_map_clear_bit(osb, &osb->mounted_map, node_num); | |
156 | ocfs2_node_map_set_bit(osb, &osb->umount_map, node_num); | |
157 | } | |
158 | ||
159 | void ocfs2_mark_inode_remotely_deleted(struct inode *inode) | |
160 | { | |
161 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
162 | ||
163 | assert_spin_locked(&oi->ip_lock); | |
164 | /* We set the SKIP_DELETE flag on the inode so we don't try to | |
165 | * delete it in delete_inode ourselves, thus avoiding | |
166 | * unecessary lock pinging. If the other node failed to wipe | |
167 | * the inode as a result of a crash, then recovery will pick | |
168 | * up the slack. */ | |
169 | oi->ip_flags |= OCFS2_INODE_DELETED|OCFS2_INODE_SKIP_DELETE; | |
170 | } | |
171 | ||
172 | static int ocfs2_process_delete_request(struct inode *inode, | |
173 | int *orphaned_slot) | |
174 | { | |
175 | int response = OCFS2_RESPONSE_BUSY; | |
176 | ||
177 | mlog(0, "DELETE vote on inode %lu, read lnk_cnt = %u, slot = %d\n", | |
178 | inode->i_ino, inode->i_nlink, *orphaned_slot); | |
179 | ||
180 | spin_lock(&OCFS2_I(inode)->ip_lock); | |
181 | ||
182 | /* Whatever our vote response is, we want to make sure that | |
183 | * the orphaned slot is recorded properly on this node *and* | |
184 | * on the requesting node. Technically, if the requesting node | |
185 | * did not know which slot the inode is orphaned in but we | |
186 | * respond with BUSY he doesn't actually need the orphaned | |
187 | * slot, but it doesn't hurt to do it here anyway. */ | |
188 | if ((*orphaned_slot) != OCFS2_INVALID_SLOT) { | |
189 | mlog_bug_on_msg(OCFS2_I(inode)->ip_orphaned_slot != | |
190 | OCFS2_INVALID_SLOT && | |
191 | OCFS2_I(inode)->ip_orphaned_slot != | |
192 | (*orphaned_slot), | |
193 | "Inode %"MLFu64": This node thinks it's " | |
194 | "orphaned in slot %d, messaged it's in %d\n", | |
195 | OCFS2_I(inode)->ip_blkno, | |
196 | OCFS2_I(inode)->ip_orphaned_slot, | |
197 | *orphaned_slot); | |
198 | ||
199 | mlog(0, "Setting orphaned slot for inode %"MLFu64" to %d\n", | |
200 | OCFS2_I(inode)->ip_blkno, *orphaned_slot); | |
201 | ||
202 | OCFS2_I(inode)->ip_orphaned_slot = *orphaned_slot; | |
203 | } else { | |
204 | mlog(0, "Sending back orphaned slot %d for inode %"MLFu64"\n", | |
205 | OCFS2_I(inode)->ip_orphaned_slot, | |
206 | OCFS2_I(inode)->ip_blkno); | |
207 | ||
208 | *orphaned_slot = OCFS2_I(inode)->ip_orphaned_slot; | |
209 | } | |
210 | ||
211 | /* vote no if the file is still open. */ | |
212 | if (OCFS2_I(inode)->ip_open_count) { | |
213 | mlog(0, "open count = %u\n", | |
214 | OCFS2_I(inode)->ip_open_count); | |
215 | spin_unlock(&OCFS2_I(inode)->ip_lock); | |
216 | goto done; | |
217 | } | |
218 | spin_unlock(&OCFS2_I(inode)->ip_lock); | |
219 | ||
220 | /* directories are a bit ugly... What if someone is sitting in | |
221 | * it? We want to make sure the inode is removed completely as | |
222 | * a result of the iput in process_vote. */ | |
223 | if (S_ISDIR(inode->i_mode) && (atomic_read(&inode->i_count) != 1)) { | |
224 | mlog(0, "i_count = %u\n", atomic_read(&inode->i_count)); | |
225 | goto done; | |
226 | } | |
227 | ||
228 | if (filemap_fdatawrite(inode->i_mapping)) { | |
229 | mlog(ML_ERROR, "Could not sync inode %"MLFu64" for delete!\n", | |
230 | OCFS2_I(inode)->ip_blkno); | |
231 | goto done; | |
232 | } | |
233 | sync_mapping_buffers(inode->i_mapping); | |
234 | truncate_inode_pages(inode->i_mapping, 0); | |
235 | ocfs2_extent_map_trunc(inode, 0); | |
236 | ||
237 | spin_lock(&OCFS2_I(inode)->ip_lock); | |
238 | /* double check open count - someone might have raced this | |
239 | * thread into ocfs2_file_open while we were writing out | |
240 | * data. If we're to allow a wipe of this inode now, we *must* | |
241 | * hold the spinlock until we've marked it. */ | |
242 | if (OCFS2_I(inode)->ip_open_count) { | |
243 | mlog(0, "Raced to wipe! open count = %u\n", | |
244 | OCFS2_I(inode)->ip_open_count); | |
245 | spin_unlock(&OCFS2_I(inode)->ip_lock); | |
246 | goto done; | |
247 | } | |
248 | ||
249 | /* Mark the inode as being wiped from disk. */ | |
250 | ocfs2_mark_inode_remotely_deleted(inode); | |
251 | spin_unlock(&OCFS2_I(inode)->ip_lock); | |
252 | ||
253 | /* Not sure this is necessary anymore. */ | |
254 | d_prune_aliases(inode); | |
255 | ||
256 | /* If we get here, then we're voting 'yes', so commit the | |
257 | * delete on our side. */ | |
258 | response = OCFS2_RESPONSE_OK; | |
259 | done: | |
260 | return response; | |
261 | } | |
262 | ||
263 | static int ocfs2_match_dentry(struct dentry *dentry, | |
264 | u64 parent_blkno, | |
265 | unsigned int namelen, | |
266 | const char *name) | |
267 | { | |
268 | struct inode *parent; | |
269 | ||
270 | if (!dentry->d_parent) { | |
271 | mlog(0, "Detached from parent.\n"); | |
272 | return 0; | |
273 | } | |
274 | ||
275 | parent = dentry->d_parent->d_inode; | |
276 | /* Negative parent dentry? */ | |
277 | if (!parent) | |
278 | return 0; | |
279 | ||
280 | /* Name is in a different directory. */ | |
281 | if (OCFS2_I(parent)->ip_blkno != parent_blkno) | |
282 | return 0; | |
283 | ||
284 | if (dentry->d_name.len != namelen) | |
285 | return 0; | |
286 | ||
287 | /* comparison above guarantees this is safe. */ | |
288 | if (memcmp(dentry->d_name.name, name, namelen)) | |
289 | return 0; | |
290 | ||
291 | return 1; | |
292 | } | |
293 | ||
294 | static void ocfs2_process_dentry_request(struct inode *inode, | |
295 | int rename, | |
296 | unsigned int new_nlink, | |
297 | u64 parent_blkno, | |
298 | unsigned int namelen, | |
299 | const char *name) | |
300 | { | |
301 | struct dentry *dentry = NULL; | |
302 | struct list_head *p; | |
303 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
304 | ||
305 | mlog(0, "parent %"MLFu64", namelen = %u, name = %.*s\n", parent_blkno, | |
306 | namelen, namelen, name); | |
307 | ||
308 | spin_lock(&dcache_lock); | |
309 | ||
310 | /* Another node is removing this name from the system. It is | |
311 | * up to us to find the corresponding dentry and if it exists, | |
312 | * unhash it from the dcache. */ | |
313 | list_for_each(p, &inode->i_dentry) { | |
314 | dentry = list_entry(p, struct dentry, d_alias); | |
315 | ||
316 | if (ocfs2_match_dentry(dentry, parent_blkno, namelen, name)) { | |
317 | mlog(0, "dentry found: %.*s\n", | |
318 | dentry->d_name.len, dentry->d_name.name); | |
319 | ||
320 | dget_locked(dentry); | |
321 | break; | |
322 | } | |
323 | ||
324 | dentry = NULL; | |
325 | } | |
326 | ||
327 | spin_unlock(&dcache_lock); | |
328 | ||
329 | if (dentry) { | |
330 | d_delete(dentry); | |
331 | dput(dentry); | |
332 | } | |
333 | ||
334 | /* rename votes don't send link counts */ | |
335 | if (!rename) { | |
336 | mlog(0, "new_nlink = %u\n", new_nlink); | |
337 | ||
338 | /* We don't have the proper locks here to directly | |
339 | * change i_nlink and besides, the vote is sent | |
340 | * *before* the operation so it may have failed on the | |
341 | * other node. This passes a hint to ocfs2_drop_inode | |
342 | * to force ocfs2_delete_inode, who will take the | |
343 | * proper cluster locks to sort things out. */ | |
344 | if (new_nlink == 0) { | |
345 | spin_lock(&oi->ip_lock); | |
346 | oi->ip_flags |= OCFS2_INODE_MAYBE_ORPHANED; | |
347 | spin_unlock(&OCFS2_I(inode)->ip_lock); | |
348 | } | |
349 | } | |
350 | } | |
351 | ||
352 | static void ocfs2_process_vote(struct ocfs2_super *osb, | |
353 | struct ocfs2_vote_msg *msg) | |
354 | { | |
355 | int net_status, vote_response; | |
356 | int orphaned_slot = 0; | |
357 | int rename = 0; | |
358 | unsigned int node_num, generation, new_nlink, namelen; | |
359 | u64 blkno, parent_blkno; | |
360 | enum ocfs2_vote_request request; | |
361 | struct inode *inode = NULL; | |
362 | struct ocfs2_msg_hdr *hdr = &msg->v_hdr; | |
363 | struct ocfs2_response_msg response; | |
364 | ||
365 | /* decode the network mumbo jumbo into local variables. */ | |
366 | request = be32_to_cpu(hdr->h_request); | |
367 | blkno = be64_to_cpu(hdr->h_blkno); | |
368 | generation = be32_to_cpu(hdr->h_generation); | |
369 | node_num = be32_to_cpu(hdr->h_node_num); | |
370 | if (request == OCFS2_VOTE_REQ_DELETE) | |
371 | orphaned_slot = be32_to_cpu(msg->md1.v_orphaned_slot); | |
372 | ||
373 | mlog(0, "processing vote: request = %u, blkno = %"MLFu64", " | |
374 | "generation = %u, node_num = %u, priv1 = %u\n", request, | |
375 | blkno, generation, node_num, be32_to_cpu(msg->md1.v_generic1)); | |
376 | ||
377 | if (!ocfs2_is_valid_vote_request(request)) { | |
378 | mlog(ML_ERROR, "Invalid vote request %d from node %u\n", | |
379 | request, node_num); | |
380 | vote_response = OCFS2_RESPONSE_BAD_MSG; | |
381 | goto respond; | |
382 | } | |
383 | ||
384 | vote_response = OCFS2_RESPONSE_OK; | |
385 | ||
386 | switch (request) { | |
387 | case OCFS2_VOTE_REQ_UMOUNT: | |
388 | ocfs2_process_umount_request(osb, node_num); | |
389 | goto respond; | |
390 | case OCFS2_VOTE_REQ_MOUNT: | |
391 | ocfs2_process_mount_request(osb, node_num); | |
392 | goto respond; | |
393 | default: | |
394 | /* avoids a gcc warning */ | |
395 | break; | |
396 | } | |
397 | ||
398 | /* We cannot process the remaining message types before we're | |
399 | * fully mounted. It's perfectly safe however to send a 'yes' | |
400 | * response as we can't possibly have any of the state they're | |
401 | * asking us to modify yet. */ | |
402 | if (atomic_read(&osb->vol_state) == VOLUME_INIT) | |
403 | goto respond; | |
404 | ||
405 | /* If we get here, then the request is against an inode. */ | |
406 | inode = ocfs2_ilookup_for_vote(osb, blkno, | |
407 | request == OCFS2_VOTE_REQ_DELETE); | |
408 | ||
409 | /* Not finding the inode is perfectly valid - it means we're | |
410 | * not interested in what the other node is about to do to it | |
411 | * so in those cases we automatically respond with an | |
412 | * affirmative. Cluster locking ensures that we won't race | |
413 | * interest in the inode with this vote request. */ | |
414 | if (!inode) | |
415 | goto respond; | |
416 | ||
417 | /* Check generation values. It's possible for us to get a | |
418 | * request against a stale inode. If so then we proceed as if | |
419 | * we had not found an inode in the first place. */ | |
420 | if (inode->i_generation != generation) { | |
421 | mlog(0, "generation passed %u != inode generation = %u, " | |
422 | "ip_flags = %x, ip_blkno = %"MLFu64", msg %"MLFu64", " | |
423 | "i_count = %u, message type = %u\n", | |
424 | generation, inode->i_generation, OCFS2_I(inode)->ip_flags, | |
425 | OCFS2_I(inode)->ip_blkno, blkno, | |
426 | atomic_read(&inode->i_count), request); | |
427 | iput(inode); | |
428 | inode = NULL; | |
429 | goto respond; | |
430 | } | |
431 | ||
432 | switch (request) { | |
433 | case OCFS2_VOTE_REQ_DELETE: | |
434 | vote_response = ocfs2_process_delete_request(inode, | |
435 | &orphaned_slot); | |
436 | break; | |
437 | case OCFS2_VOTE_REQ_RENAME: | |
438 | rename = 1; | |
439 | /* fall through */ | |
440 | case OCFS2_VOTE_REQ_UNLINK: | |
441 | parent_blkno = be64_to_cpu(msg->v_unlink_parent); | |
442 | namelen = be32_to_cpu(msg->v_unlink_namelen); | |
443 | /* new_nlink will be ignored in case of a rename vote */ | |
444 | new_nlink = be32_to_cpu(msg->md1.v_nlink); | |
445 | ocfs2_process_dentry_request(inode, rename, new_nlink, | |
446 | parent_blkno, namelen, | |
447 | msg->v_unlink_dirent); | |
448 | break; | |
449 | default: | |
450 | mlog(ML_ERROR, "node %u, invalid request: %u\n", | |
451 | node_num, request); | |
452 | vote_response = OCFS2_RESPONSE_BAD_MSG; | |
453 | } | |
454 | ||
455 | respond: | |
456 | /* Response struture is small so we just put it on the stack | |
457 | * and stuff it inline. */ | |
458 | memset(&response, 0, sizeof(struct ocfs2_response_msg)); | |
459 | response.r_hdr.h_response_id = hdr->h_response_id; | |
460 | response.r_hdr.h_blkno = hdr->h_blkno; | |
461 | response.r_hdr.h_generation = hdr->h_generation; | |
462 | response.r_hdr.h_node_num = cpu_to_be32(osb->node_num); | |
463 | response.r_response = cpu_to_be32(vote_response); | |
464 | response.r_orphaned_slot = cpu_to_be32(orphaned_slot); | |
465 | ||
466 | net_status = o2net_send_message(OCFS2_MESSAGE_TYPE_RESPONSE, | |
467 | osb->net_key, | |
468 | &response, | |
469 | sizeof(struct ocfs2_response_msg), | |
470 | node_num, | |
471 | NULL); | |
472 | /* We still want to error print for ENOPROTOOPT here. The | |
473 | * sending node shouldn't have unregistered his net handler | |
474 | * without sending an unmount vote 1st */ | |
475 | if (net_status < 0 | |
476 | && net_status != -ETIMEDOUT | |
477 | && net_status != -ENOTCONN) | |
478 | mlog(ML_ERROR, "message to node %u fails with error %d!\n", | |
479 | node_num, net_status); | |
480 | ||
481 | if (inode) | |
482 | iput(inode); | |
483 | } | |
484 | ||
485 | static void ocfs2_vote_thread_do_work(struct ocfs2_super *osb) | |
486 | { | |
487 | unsigned long processed; | |
488 | struct ocfs2_lock_res *lockres; | |
489 | struct ocfs2_vote_work *work; | |
490 | ||
491 | mlog_entry_void(); | |
492 | ||
493 | spin_lock(&osb->vote_task_lock); | |
494 | /* grab this early so we know to try again if a state change and | |
495 | * wake happens part-way through our work */ | |
496 | osb->vote_work_sequence = osb->vote_wake_sequence; | |
497 | ||
498 | processed = osb->blocked_lock_count; | |
499 | while (processed) { | |
500 | BUG_ON(list_empty(&osb->blocked_lock_list)); | |
501 | ||
502 | lockres = list_entry(osb->blocked_lock_list.next, | |
503 | struct ocfs2_lock_res, l_blocked_list); | |
504 | list_del_init(&lockres->l_blocked_list); | |
505 | osb->blocked_lock_count--; | |
506 | spin_unlock(&osb->vote_task_lock); | |
507 | ||
508 | BUG_ON(!processed); | |
509 | processed--; | |
510 | ||
511 | ocfs2_process_blocked_lock(osb, lockres); | |
512 | ||
513 | spin_lock(&osb->vote_task_lock); | |
514 | } | |
515 | ||
516 | while (osb->vote_count) { | |
517 | BUG_ON(list_empty(&osb->vote_list)); | |
518 | work = list_entry(osb->vote_list.next, | |
519 | struct ocfs2_vote_work, w_list); | |
520 | list_del(&work->w_list); | |
521 | osb->vote_count--; | |
522 | spin_unlock(&osb->vote_task_lock); | |
523 | ||
524 | ocfs2_process_vote(osb, &work->w_msg); | |
525 | kfree(work); | |
526 | ||
527 | spin_lock(&osb->vote_task_lock); | |
528 | } | |
529 | spin_unlock(&osb->vote_task_lock); | |
530 | ||
531 | mlog_exit_void(); | |
532 | } | |
533 | ||
534 | static int ocfs2_vote_thread_lists_empty(struct ocfs2_super *osb) | |
535 | { | |
536 | int empty = 0; | |
537 | ||
538 | spin_lock(&osb->vote_task_lock); | |
539 | if (list_empty(&osb->blocked_lock_list) && | |
540 | list_empty(&osb->vote_list)) | |
541 | empty = 1; | |
542 | ||
543 | spin_unlock(&osb->vote_task_lock); | |
544 | return empty; | |
545 | } | |
546 | ||
547 | static int ocfs2_vote_thread_should_wake(struct ocfs2_super *osb) | |
548 | { | |
549 | int should_wake = 0; | |
550 | ||
551 | spin_lock(&osb->vote_task_lock); | |
552 | if (osb->vote_work_sequence != osb->vote_wake_sequence) | |
553 | should_wake = 1; | |
554 | spin_unlock(&osb->vote_task_lock); | |
555 | ||
556 | return should_wake; | |
557 | } | |
558 | ||
559 | int ocfs2_vote_thread(void *arg) | |
560 | { | |
561 | int status = 0; | |
562 | struct ocfs2_super *osb = arg; | |
563 | ||
564 | /* only quit once we've been asked to stop and there is no more | |
565 | * work available */ | |
566 | while (!(kthread_should_stop() && | |
567 | ocfs2_vote_thread_lists_empty(osb))) { | |
568 | ||
569 | wait_event_interruptible(osb->vote_event, | |
570 | ocfs2_vote_thread_should_wake(osb) || | |
571 | kthread_should_stop()); | |
572 | ||
573 | mlog(0, "vote_thread: awoken\n"); | |
574 | ||
575 | ocfs2_vote_thread_do_work(osb); | |
576 | } | |
577 | ||
578 | osb->vote_task = NULL; | |
579 | return status; | |
580 | } | |
581 | ||
582 | static struct ocfs2_net_wait_ctxt *ocfs2_new_net_wait_ctxt(unsigned int response_id) | |
583 | { | |
584 | struct ocfs2_net_wait_ctxt *w; | |
585 | ||
586 | w = kcalloc(1, sizeof(*w), GFP_KERNEL); | |
587 | if (!w) { | |
588 | mlog_errno(-ENOMEM); | |
589 | goto bail; | |
590 | } | |
591 | ||
592 | INIT_LIST_HEAD(&w->n_list); | |
593 | init_waitqueue_head(&w->n_event); | |
594 | ocfs2_node_map_init(&w->n_node_map); | |
595 | w->n_response_id = response_id; | |
596 | w->n_callback = NULL; | |
597 | bail: | |
598 | return w; | |
599 | } | |
600 | ||
601 | static unsigned int ocfs2_new_response_id(struct ocfs2_super *osb) | |
602 | { | |
603 | unsigned int ret; | |
604 | ||
605 | spin_lock(&osb->net_response_lock); | |
606 | ret = ++osb->net_response_ids; | |
607 | spin_unlock(&osb->net_response_lock); | |
608 | ||
609 | return ret; | |
610 | } | |
611 | ||
612 | static void ocfs2_dequeue_net_wait_ctxt(struct ocfs2_super *osb, | |
613 | struct ocfs2_net_wait_ctxt *w) | |
614 | { | |
615 | spin_lock(&osb->net_response_lock); | |
616 | list_del(&w->n_list); | |
617 | spin_unlock(&osb->net_response_lock); | |
618 | } | |
619 | ||
620 | static void ocfs2_queue_net_wait_ctxt(struct ocfs2_super *osb, | |
621 | struct ocfs2_net_wait_ctxt *w) | |
622 | { | |
623 | spin_lock(&osb->net_response_lock); | |
624 | list_add_tail(&w->n_list, | |
625 | &osb->net_response_list); | |
626 | spin_unlock(&osb->net_response_lock); | |
627 | } | |
628 | ||
629 | static void __ocfs2_mark_node_responded(struct ocfs2_super *osb, | |
630 | struct ocfs2_net_wait_ctxt *w, | |
631 | int node_num) | |
632 | { | |
633 | assert_spin_locked(&osb->net_response_lock); | |
634 | ||
635 | ocfs2_node_map_clear_bit(osb, &w->n_node_map, node_num); | |
636 | if (ocfs2_node_map_is_empty(osb, &w->n_node_map)) | |
637 | wake_up(&w->n_event); | |
638 | } | |
639 | ||
640 | /* Intended to be called from the node down callback, we fake remove | |
641 | * the node from all our response contexts */ | |
642 | void ocfs2_remove_node_from_vote_queues(struct ocfs2_super *osb, | |
643 | int node_num) | |
644 | { | |
645 | struct list_head *p; | |
646 | struct ocfs2_net_wait_ctxt *w = NULL; | |
647 | ||
648 | spin_lock(&osb->net_response_lock); | |
649 | ||
650 | list_for_each(p, &osb->net_response_list) { | |
651 | w = list_entry(p, struct ocfs2_net_wait_ctxt, n_list); | |
652 | ||
653 | __ocfs2_mark_node_responded(osb, w, node_num); | |
654 | } | |
655 | ||
656 | spin_unlock(&osb->net_response_lock); | |
657 | } | |
658 | ||
659 | static int ocfs2_broadcast_vote(struct ocfs2_super *osb, | |
660 | struct ocfs2_vote_msg *request, | |
661 | unsigned int response_id, | |
662 | int *response, | |
663 | struct ocfs2_net_response_cb *callback) | |
664 | { | |
665 | int status, i, remote_err; | |
666 | struct ocfs2_net_wait_ctxt *w = NULL; | |
667 | int dequeued = 0; | |
668 | ||
669 | mlog_entry_void(); | |
670 | ||
671 | w = ocfs2_new_net_wait_ctxt(response_id); | |
672 | if (!w) { | |
673 | status = -ENOMEM; | |
674 | mlog_errno(status); | |
675 | goto bail; | |
676 | } | |
677 | w->n_callback = callback; | |
678 | ||
679 | /* we're pretty much ready to go at this point, and this fills | |
680 | * in n_response which we need anyway... */ | |
681 | ocfs2_queue_net_wait_ctxt(osb, w); | |
682 | ||
683 | i = ocfs2_node_map_iterate(osb, &osb->mounted_map, 0); | |
684 | ||
685 | while (i != O2NM_INVALID_NODE_NUM) { | |
686 | if (i != osb->node_num) { | |
687 | mlog(0, "trying to send request to node %i\n", i); | |
688 | ocfs2_node_map_set_bit(osb, &w->n_node_map, i); | |
689 | ||
690 | remote_err = 0; | |
691 | status = o2net_send_message(OCFS2_MESSAGE_TYPE_VOTE, | |
692 | osb->net_key, | |
693 | request, | |
694 | sizeof(*request), | |
695 | i, | |
696 | &remote_err); | |
697 | if (status == -ETIMEDOUT) { | |
698 | mlog(0, "remote node %d timed out!\n", i); | |
699 | status = -EAGAIN; | |
700 | goto bail; | |
701 | } | |
702 | if (remote_err < 0) { | |
703 | status = remote_err; | |
704 | mlog(0, "remote error %d on node %d!\n", | |
705 | remote_err, i); | |
706 | mlog_errno(status); | |
707 | goto bail; | |
708 | } | |
709 | if (status < 0) { | |
710 | mlog_errno(status); | |
711 | goto bail; | |
712 | } | |
713 | } | |
714 | i++; | |
715 | i = ocfs2_node_map_iterate(osb, &osb->mounted_map, i); | |
716 | mlog(0, "next is %d, i am %d\n", i, osb->node_num); | |
717 | } | |
718 | mlog(0, "done sending, now waiting on responses...\n"); | |
719 | ||
720 | wait_event(w->n_event, ocfs2_node_map_is_empty(osb, &w->n_node_map)); | |
721 | ||
722 | ocfs2_dequeue_net_wait_ctxt(osb, w); | |
723 | dequeued = 1; | |
724 | ||
725 | *response = w->n_response; | |
726 | status = 0; | |
727 | bail: | |
728 | if (w) { | |
729 | if (!dequeued) | |
730 | ocfs2_dequeue_net_wait_ctxt(osb, w); | |
731 | kfree(w); | |
732 | } | |
733 | ||
734 | mlog_exit(status); | |
735 | return status; | |
736 | } | |
737 | ||
738 | static struct ocfs2_vote_msg * ocfs2_new_vote_request(struct ocfs2_super *osb, | |
739 | u64 blkno, | |
740 | unsigned int generation, | |
741 | enum ocfs2_vote_request type, | |
742 | u32 priv) | |
743 | { | |
744 | struct ocfs2_vote_msg *request; | |
745 | struct ocfs2_msg_hdr *hdr; | |
746 | ||
747 | BUG_ON(!ocfs2_is_valid_vote_request(type)); | |
748 | ||
749 | request = kcalloc(1, sizeof(*request), GFP_KERNEL); | |
750 | if (!request) { | |
751 | mlog_errno(-ENOMEM); | |
752 | } else { | |
753 | hdr = &request->v_hdr; | |
754 | hdr->h_node_num = cpu_to_be32(osb->node_num); | |
755 | hdr->h_request = cpu_to_be32(type); | |
756 | hdr->h_blkno = cpu_to_be64(blkno); | |
757 | hdr->h_generation = cpu_to_be32(generation); | |
758 | ||
759 | request->md1.v_generic1 = cpu_to_be32(priv); | |
760 | } | |
761 | ||
762 | return request; | |
763 | } | |
764 | ||
765 | /* Complete the buildup of a new vote request and process the | |
766 | * broadcast return value. */ | |
767 | static int ocfs2_do_request_vote(struct ocfs2_super *osb, | |
768 | struct ocfs2_vote_msg *request, | |
769 | struct ocfs2_net_response_cb *callback) | |
770 | { | |
771 | int status, response; | |
772 | unsigned int response_id; | |
773 | struct ocfs2_msg_hdr *hdr; | |
774 | ||
775 | response_id = ocfs2_new_response_id(osb); | |
776 | ||
777 | hdr = &request->v_hdr; | |
778 | hdr->h_response_id = cpu_to_be32(response_id); | |
779 | ||
780 | status = ocfs2_broadcast_vote(osb, request, response_id, &response, | |
781 | callback); | |
782 | if (status < 0) { | |
783 | mlog_errno(status); | |
784 | goto bail; | |
785 | } | |
786 | ||
787 | status = response; | |
788 | bail: | |
789 | ||
790 | return status; | |
791 | } | |
792 | ||
793 | static int ocfs2_request_vote(struct inode *inode, | |
794 | struct ocfs2_vote_msg *request, | |
795 | struct ocfs2_net_response_cb *callback) | |
796 | { | |
797 | int status; | |
798 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
799 | ||
800 | if (ocfs2_inode_is_new(inode)) | |
801 | return 0; | |
802 | ||
803 | status = -EAGAIN; | |
804 | while (status == -EAGAIN) { | |
805 | if (!(osb->s_mount_opt & OCFS2_MOUNT_NOINTR) && | |
806 | signal_pending(current)) | |
807 | return -ERESTARTSYS; | |
808 | ||
809 | status = ocfs2_super_lock(osb, 0); | |
810 | if (status < 0) { | |
811 | mlog_errno(status); | |
812 | break; | |
813 | } | |
814 | ||
815 | status = 0; | |
816 | if (!ocfs2_node_map_is_only(osb, &osb->mounted_map, | |
817 | osb->node_num)) | |
818 | status = ocfs2_do_request_vote(osb, request, callback); | |
819 | ||
820 | ocfs2_super_unlock(osb, 0); | |
821 | } | |
822 | return status; | |
823 | } | |
824 | ||
825 | static void ocfs2_delete_response_cb(void *priv, | |
826 | struct ocfs2_response_msg *resp) | |
827 | { | |
828 | int orphaned_slot, node; | |
829 | struct inode *inode = priv; | |
830 | ||
831 | orphaned_slot = be32_to_cpu(resp->r_orphaned_slot); | |
832 | node = be32_to_cpu(resp->r_hdr.h_node_num); | |
833 | mlog(0, "node %d tells us that inode %"MLFu64" is orphaned in slot " | |
834 | "%d\n", node, OCFS2_I(inode)->ip_blkno, orphaned_slot); | |
835 | ||
836 | /* The other node may not actually know which slot the inode | |
837 | * is orphaned in. */ | |
838 | if (orphaned_slot == OCFS2_INVALID_SLOT) | |
839 | return; | |
840 | ||
841 | /* Ok, the responding node knows which slot this inode is | |
842 | * orphaned in. We verify that the information is correct and | |
843 | * then record this in the inode. ocfs2_delete_inode will use | |
844 | * this information to determine which lock to take. */ | |
845 | spin_lock(&OCFS2_I(inode)->ip_lock); | |
846 | mlog_bug_on_msg(OCFS2_I(inode)->ip_orphaned_slot != orphaned_slot && | |
847 | OCFS2_I(inode)->ip_orphaned_slot | |
848 | != OCFS2_INVALID_SLOT, "Inode %"MLFu64": Node %d " | |
849 | "says it's orphaned in slot %d, we think it's in %d\n", | |
850 | OCFS2_I(inode)->ip_blkno, | |
851 | be32_to_cpu(resp->r_hdr.h_node_num), | |
852 | orphaned_slot, OCFS2_I(inode)->ip_orphaned_slot); | |
853 | ||
854 | OCFS2_I(inode)->ip_orphaned_slot = orphaned_slot; | |
855 | spin_unlock(&OCFS2_I(inode)->ip_lock); | |
856 | } | |
857 | ||
858 | int ocfs2_request_delete_vote(struct inode *inode) | |
859 | { | |
860 | int orphaned_slot, status; | |
861 | struct ocfs2_net_response_cb delete_cb; | |
862 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
863 | struct ocfs2_vote_msg *request; | |
864 | ||
865 | spin_lock(&OCFS2_I(inode)->ip_lock); | |
866 | orphaned_slot = OCFS2_I(inode)->ip_orphaned_slot; | |
867 | spin_unlock(&OCFS2_I(inode)->ip_lock); | |
868 | ||
869 | delete_cb.rc_cb = ocfs2_delete_response_cb; | |
870 | delete_cb.rc_priv = inode; | |
871 | ||
872 | mlog(0, "Inode %"MLFu64", we start thinking orphaned slot is %d\n", | |
873 | OCFS2_I(inode)->ip_blkno, orphaned_slot); | |
874 | ||
875 | status = -ENOMEM; | |
876 | request = ocfs2_new_vote_request(osb, OCFS2_I(inode)->ip_blkno, | |
877 | inode->i_generation, | |
878 | OCFS2_VOTE_REQ_DELETE, orphaned_slot); | |
879 | if (request) { | |
880 | status = ocfs2_request_vote(inode, request, &delete_cb); | |
881 | ||
882 | kfree(request); | |
883 | } | |
884 | ||
885 | return status; | |
886 | } | |
887 | ||
888 | static void ocfs2_setup_unlink_vote(struct ocfs2_vote_msg *request, | |
889 | struct dentry *dentry) | |
890 | { | |
891 | struct inode *parent = dentry->d_parent->d_inode; | |
892 | ||
893 | /* We need some values which will uniquely identify a dentry | |
894 | * on the other nodes so that they can find it and run | |
895 | * d_delete against it. Parent directory block and full name | |
896 | * should suffice. */ | |
897 | ||
898 | mlog(0, "unlink/rename request: parent: %"MLFu64" name: %.*s\n", | |
899 | OCFS2_I(parent)->ip_blkno, dentry->d_name.len, | |
900 | dentry->d_name.name); | |
901 | ||
902 | request->v_unlink_parent = cpu_to_be64(OCFS2_I(parent)->ip_blkno); | |
903 | request->v_unlink_namelen = cpu_to_be32(dentry->d_name.len); | |
904 | memcpy(request->v_unlink_dirent, dentry->d_name.name, | |
905 | dentry->d_name.len); | |
906 | } | |
907 | ||
908 | int ocfs2_request_unlink_vote(struct inode *inode, | |
909 | struct dentry *dentry, | |
910 | unsigned int nlink) | |
911 | { | |
912 | int status; | |
913 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
914 | struct ocfs2_vote_msg *request; | |
915 | ||
916 | if (dentry->d_name.len > OCFS2_VOTE_FILENAME_LEN) | |
917 | return -ENAMETOOLONG; | |
918 | ||
919 | status = -ENOMEM; | |
920 | request = ocfs2_new_vote_request(osb, OCFS2_I(inode)->ip_blkno, | |
921 | inode->i_generation, | |
922 | OCFS2_VOTE_REQ_UNLINK, nlink); | |
923 | if (request) { | |
924 | ocfs2_setup_unlink_vote(request, dentry); | |
925 | ||
926 | status = ocfs2_request_vote(inode, request, NULL); | |
927 | ||
928 | kfree(request); | |
929 | } | |
930 | return status; | |
931 | } | |
932 | ||
933 | int ocfs2_request_rename_vote(struct inode *inode, | |
934 | struct dentry *dentry) | |
935 | { | |
936 | int status; | |
937 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
938 | struct ocfs2_vote_msg *request; | |
939 | ||
940 | if (dentry->d_name.len > OCFS2_VOTE_FILENAME_LEN) | |
941 | return -ENAMETOOLONG; | |
942 | ||
943 | status = -ENOMEM; | |
944 | request = ocfs2_new_vote_request(osb, OCFS2_I(inode)->ip_blkno, | |
945 | inode->i_generation, | |
946 | OCFS2_VOTE_REQ_RENAME, 0); | |
947 | if (request) { | |
948 | ocfs2_setup_unlink_vote(request, dentry); | |
949 | ||
950 | status = ocfs2_request_vote(inode, request, NULL); | |
951 | ||
952 | kfree(request); | |
953 | } | |
954 | return status; | |
955 | } | |
956 | ||
957 | int ocfs2_request_mount_vote(struct ocfs2_super *osb) | |
958 | { | |
959 | int status; | |
960 | struct ocfs2_vote_msg *request = NULL; | |
961 | ||
962 | request = ocfs2_new_vote_request(osb, 0ULL, 0, | |
963 | OCFS2_VOTE_REQ_MOUNT, 0); | |
964 | if (!request) { | |
965 | status = -ENOMEM; | |
966 | goto bail; | |
967 | } | |
968 | ||
969 | status = -EAGAIN; | |
970 | while (status == -EAGAIN) { | |
971 | if (!(osb->s_mount_opt & OCFS2_MOUNT_NOINTR) && | |
972 | signal_pending(current)) { | |
973 | status = -ERESTARTSYS; | |
974 | goto bail; | |
975 | } | |
976 | ||
977 | if (ocfs2_node_map_is_only(osb, &osb->mounted_map, | |
978 | osb->node_num)) { | |
979 | status = 0; | |
980 | goto bail; | |
981 | } | |
982 | ||
983 | status = ocfs2_do_request_vote(osb, request, NULL); | |
984 | } | |
985 | ||
986 | bail: | |
987 | if (request) | |
988 | kfree(request); | |
989 | ||
990 | return status; | |
991 | } | |
992 | ||
993 | int ocfs2_request_umount_vote(struct ocfs2_super *osb) | |
994 | { | |
995 | int status; | |
996 | struct ocfs2_vote_msg *request = NULL; | |
997 | ||
998 | request = ocfs2_new_vote_request(osb, 0ULL, 0, | |
999 | OCFS2_VOTE_REQ_UMOUNT, 0); | |
1000 | if (!request) { | |
1001 | status = -ENOMEM; | |
1002 | goto bail; | |
1003 | } | |
1004 | ||
1005 | status = -EAGAIN; | |
1006 | while (status == -EAGAIN) { | |
1007 | /* Do not check signals on this vote... We really want | |
1008 | * this one to go all the way through. */ | |
1009 | ||
1010 | if (ocfs2_node_map_is_only(osb, &osb->mounted_map, | |
1011 | osb->node_num)) { | |
1012 | status = 0; | |
1013 | goto bail; | |
1014 | } | |
1015 | ||
1016 | status = ocfs2_do_request_vote(osb, request, NULL); | |
1017 | } | |
1018 | ||
1019 | bail: | |
1020 | if (request) | |
1021 | kfree(request); | |
1022 | ||
1023 | return status; | |
1024 | } | |
1025 | ||
1026 | /* TODO: This should eventually be a hash table! */ | |
1027 | static struct ocfs2_net_wait_ctxt * __ocfs2_find_net_wait_ctxt(struct ocfs2_super *osb, | |
1028 | u32 response_id) | |
1029 | { | |
1030 | struct list_head *p; | |
1031 | struct ocfs2_net_wait_ctxt *w = NULL; | |
1032 | ||
1033 | list_for_each(p, &osb->net_response_list) { | |
1034 | w = list_entry(p, struct ocfs2_net_wait_ctxt, n_list); | |
1035 | if (response_id == w->n_response_id) | |
1036 | break; | |
1037 | w = NULL; | |
1038 | } | |
1039 | ||
1040 | return w; | |
1041 | } | |
1042 | ||
1043 | /* Translate response codes into local node errno values */ | |
1044 | static inline int ocfs2_translate_response(int response) | |
1045 | { | |
1046 | int ret; | |
1047 | ||
1048 | switch (response) { | |
1049 | case OCFS2_RESPONSE_OK: | |
1050 | ret = 0; | |
1051 | break; | |
1052 | ||
1053 | case OCFS2_RESPONSE_BUSY: | |
1054 | ret = -EBUSY; | |
1055 | break; | |
1056 | ||
1057 | default: | |
1058 | ret = -EINVAL; | |
1059 | } | |
1060 | ||
1061 | return ret; | |
1062 | } | |
1063 | ||
1064 | static int ocfs2_handle_response_message(struct o2net_msg *msg, | |
1065 | u32 len, | |
1066 | void *data) | |
1067 | { | |
1068 | unsigned int response_id, node_num; | |
1069 | int response_status; | |
1070 | struct ocfs2_super *osb = data; | |
1071 | struct ocfs2_response_msg *resp; | |
1072 | struct ocfs2_net_wait_ctxt * w; | |
1073 | struct ocfs2_net_response_cb *resp_cb; | |
1074 | ||
1075 | resp = (struct ocfs2_response_msg *) msg->buf; | |
1076 | ||
1077 | response_id = be32_to_cpu(resp->r_hdr.h_response_id); | |
1078 | node_num = be32_to_cpu(resp->r_hdr.h_node_num); | |
1079 | response_status = | |
1080 | ocfs2_translate_response(be32_to_cpu(resp->r_response)); | |
1081 | ||
1082 | mlog(0, "received response message:\n"); | |
1083 | mlog(0, "h_response_id = %u\n", response_id); | |
1084 | mlog(0, "h_request = %u\n", be32_to_cpu(resp->r_hdr.h_request)); | |
1085 | mlog(0, "h_blkno = %"MLFu64"\n", be64_to_cpu(resp->r_hdr.h_blkno)); | |
1086 | mlog(0, "h_generation = %u\n", be32_to_cpu(resp->r_hdr.h_generation)); | |
1087 | mlog(0, "h_node_num = %u\n", node_num); | |
1088 | mlog(0, "r_response = %d\n", response_status); | |
1089 | ||
1090 | spin_lock(&osb->net_response_lock); | |
1091 | w = __ocfs2_find_net_wait_ctxt(osb, response_id); | |
1092 | if (!w) { | |
1093 | mlog(0, "request not found!\n"); | |
1094 | goto bail; | |
1095 | } | |
1096 | resp_cb = w->n_callback; | |
1097 | ||
1098 | if (response_status && (!w->n_response)) { | |
1099 | /* we only really need one negative response so don't | |
1100 | * set it twice. */ | |
1101 | w->n_response = response_status; | |
1102 | } | |
1103 | ||
1104 | if (resp_cb) { | |
1105 | spin_unlock(&osb->net_response_lock); | |
1106 | ||
1107 | resp_cb->rc_cb(resp_cb->rc_priv, resp); | |
1108 | ||
1109 | spin_lock(&osb->net_response_lock); | |
1110 | } | |
1111 | ||
1112 | __ocfs2_mark_node_responded(osb, w, node_num); | |
1113 | bail: | |
1114 | spin_unlock(&osb->net_response_lock); | |
1115 | ||
1116 | return 0; | |
1117 | } | |
1118 | ||
1119 | static int ocfs2_handle_vote_message(struct o2net_msg *msg, | |
1120 | u32 len, | |
1121 | void *data) | |
1122 | { | |
1123 | int status; | |
1124 | struct ocfs2_super *osb = data; | |
1125 | struct ocfs2_vote_work *work; | |
1126 | ||
1127 | work = kmalloc(sizeof(struct ocfs2_vote_work), GFP_KERNEL); | |
1128 | if (!work) { | |
1129 | status = -ENOMEM; | |
1130 | mlog_errno(status); | |
1131 | goto bail; | |
1132 | } | |
1133 | ||
1134 | INIT_LIST_HEAD(&work->w_list); | |
1135 | memcpy(&work->w_msg, msg->buf, sizeof(struct ocfs2_vote_msg)); | |
1136 | ||
1137 | mlog(0, "scheduling vote request:\n"); | |
1138 | mlog(0, "h_response_id = %u\n", | |
1139 | be32_to_cpu(work->w_msg.v_hdr.h_response_id)); | |
1140 | mlog(0, "h_request = %u\n", be32_to_cpu(work->w_msg.v_hdr.h_request)); | |
1141 | mlog(0, "h_blkno = %"MLFu64"\n", | |
1142 | be64_to_cpu(work->w_msg.v_hdr.h_blkno)); | |
1143 | mlog(0, "h_generation = %u\n", | |
1144 | be32_to_cpu(work->w_msg.v_hdr.h_generation)); | |
1145 | mlog(0, "h_node_num = %u\n", | |
1146 | be32_to_cpu(work->w_msg.v_hdr.h_node_num)); | |
1147 | mlog(0, "v_generic1 = %u\n", be32_to_cpu(work->w_msg.md1.v_generic1)); | |
1148 | ||
1149 | spin_lock(&osb->vote_task_lock); | |
1150 | list_add_tail(&work->w_list, &osb->vote_list); | |
1151 | osb->vote_count++; | |
1152 | spin_unlock(&osb->vote_task_lock); | |
1153 | ||
1154 | ocfs2_kick_vote_thread(osb); | |
1155 | ||
1156 | status = 0; | |
1157 | bail: | |
1158 | return status; | |
1159 | } | |
1160 | ||
1161 | void ocfs2_unregister_net_handlers(struct ocfs2_super *osb) | |
1162 | { | |
1163 | if (!osb->net_key) | |
1164 | return; | |
1165 | ||
1166 | o2net_unregister_handler_list(&osb->osb_net_handlers); | |
1167 | ||
1168 | if (!list_empty(&osb->net_response_list)) | |
1169 | mlog(ML_ERROR, "net response list not empty!\n"); | |
1170 | ||
1171 | osb->net_key = 0; | |
1172 | } | |
1173 | ||
1174 | int ocfs2_register_net_handlers(struct ocfs2_super *osb) | |
1175 | { | |
1176 | int status = 0; | |
1177 | ||
1178 | status = o2net_register_handler(OCFS2_MESSAGE_TYPE_RESPONSE, | |
1179 | osb->net_key, | |
1180 | sizeof(struct ocfs2_response_msg), | |
1181 | ocfs2_handle_response_message, | |
1182 | osb, &osb->osb_net_handlers); | |
1183 | if (status) { | |
1184 | mlog_errno(status); | |
1185 | goto bail; | |
1186 | } | |
1187 | ||
1188 | status = o2net_register_handler(OCFS2_MESSAGE_TYPE_VOTE, | |
1189 | osb->net_key, | |
1190 | sizeof(struct ocfs2_vote_msg), | |
1191 | ocfs2_handle_vote_message, | |
1192 | osb, &osb->osb_net_handlers); | |
1193 | if (status) { | |
1194 | mlog_errno(status); | |
1195 | goto bail; | |
1196 | } | |
1197 | bail: | |
1198 | if (status < 0) | |
1199 | ocfs2_unregister_net_handlers(osb); | |
1200 | ||
1201 | return status; | |
1202 | } |