Lines Matching full:block
43 static void nlmsvc_release_block(struct nlm_block *block);
44 static void nlmsvc_insert_block(struct nlm_block *block, unsigned long);
45 static void nlmsvc_remove_block(struct nlm_block *block);
90 nlmsvc_insert_block_locked(struct nlm_block *block, unsigned long when) in nlmsvc_insert_block_locked() argument
95 dprintk("lockd: nlmsvc_insert_block(%p, %ld)\n", block, when); in nlmsvc_insert_block_locked()
96 if (list_empty(&block->b_list)) { in nlmsvc_insert_block_locked()
97 kref_get(&block->b_count); in nlmsvc_insert_block_locked()
99 list_del_init(&block->b_list); in nlmsvc_insert_block_locked()
116 list_add_tail(&block->b_list, pos); in nlmsvc_insert_block_locked()
117 block->b_when = when; in nlmsvc_insert_block_locked()
120 static void nlmsvc_insert_block(struct nlm_block *block, unsigned long when) in nlmsvc_insert_block() argument
123 nlmsvc_insert_block_locked(block, when); in nlmsvc_insert_block()
128 * Remove a block from the global list
131 nlmsvc_remove_block(struct nlm_block *block) in nlmsvc_remove_block() argument
133 if (!list_empty(&block->b_list)) { in nlmsvc_remove_block()
135 list_del_init(&block->b_list); in nlmsvc_remove_block()
137 nlmsvc_release_block(block); in nlmsvc_remove_block()
142 * Find a block for a given lock
147 struct nlm_block *block; in nlmsvc_lookup_block() local
154 list_for_each_entry(block, &nlm_blocked, b_list) { in nlmsvc_lookup_block()
155 fl = &block->b_call->a_args.lock.fl; in nlmsvc_lookup_block()
157 block->b_file, fl->fl_pid, in nlmsvc_lookup_block()
160 nlmdbg_cookie2a(&block->b_call->a_args.cookie)); in nlmsvc_lookup_block()
161 if (block->b_file == file && nlm_compare_locks(fl, &lock->fl)) { in nlmsvc_lookup_block()
162 kref_get(&block->b_count); in nlmsvc_lookup_block()
163 return block; in nlmsvc_lookup_block()
180 * Find a block with a given NLM cookie.
185 struct nlm_block *block; in nlmsvc_find_block() local
187 list_for_each_entry(block, &nlm_blocked, b_list) { in nlmsvc_find_block()
188 if (nlm_cookie_match(&block->b_call->a_args.cookie,cookie)) in nlmsvc_find_block()
195 dprintk("nlmsvc_find_block(%s): block=%p\n", nlmdbg_cookie2a(cookie), block); in nlmsvc_find_block()
196 kref_get(&block->b_count); in nlmsvc_find_block()
197 return block; in nlmsvc_find_block()
201 * Create a block and initialize it.
220 struct nlm_block *block; in nlmsvc_create_block() local
227 /* Allocate memory for block, and initialize arguments */ in nlmsvc_create_block()
228 block = kzalloc(sizeof(*block), GFP_KERNEL); in nlmsvc_create_block()
229 if (block == NULL) in nlmsvc_create_block()
231 kref_init(&block->b_count); in nlmsvc_create_block()
232 INIT_LIST_HEAD(&block->b_list); in nlmsvc_create_block()
233 INIT_LIST_HEAD(&block->b_flist); in nlmsvc_create_block()
243 dprintk("lockd: created block %p...\n", block); in nlmsvc_create_block()
245 /* Create and initialize the block */ in nlmsvc_create_block()
246 block->b_daemon = rqstp->rq_server; in nlmsvc_create_block()
247 block->b_host = host; in nlmsvc_create_block()
248 block->b_file = file; in nlmsvc_create_block()
252 list_add(&block->b_flist, &file->f_blocks); in nlmsvc_create_block()
255 block->b_call = call; in nlmsvc_create_block()
257 call->a_block = block; in nlmsvc_create_block()
259 return block; in nlmsvc_create_block()
262 kfree(block); in nlmsvc_create_block()
269 * Delete a block.
273 static int nlmsvc_unlink_block(struct nlm_block *block) in nlmsvc_unlink_block() argument
276 dprintk("lockd: unlinking block %p...\n", block); in nlmsvc_unlink_block()
278 /* Remove block from list */ in nlmsvc_unlink_block()
279 status = posix_unblock_lock(&block->b_call->a_args.lock.fl); in nlmsvc_unlink_block()
280 nlmsvc_remove_block(block); in nlmsvc_unlink_block()
286 struct nlm_block *block = container_of(kref, struct nlm_block, b_count); in nlmsvc_free_block() local
287 struct nlm_file *file = block->b_file; in nlmsvc_free_block()
289 dprintk("lockd: freeing block %p...\n", block); in nlmsvc_free_block()
291 /* Remove block from file's list of blocks */ in nlmsvc_free_block()
292 list_del_init(&block->b_flist); in nlmsvc_free_block()
295 nlmsvc_freegrantargs(block->b_call); in nlmsvc_free_block()
296 nlmsvc_release_call(block->b_call); in nlmsvc_free_block()
297 nlm_release_file(block->b_file); in nlmsvc_free_block()
298 kfree(block); in nlmsvc_free_block()
301 static void nlmsvc_release_block(struct nlm_block *block) in nlmsvc_release_block() argument
303 if (block != NULL) in nlmsvc_release_block()
304 kref_put_mutex(&block->b_count, nlmsvc_free_block, &block->b_file->f_mutex); in nlmsvc_release_block()
315 struct nlm_block *block, *next; in nlmsvc_traverse_blocks() local
319 list_for_each_entry_safe(block, next, &file->f_blocks, b_flist) { in nlmsvc_traverse_blocks()
320 if (!match(block->b_host, host)) in nlmsvc_traverse_blocks()
324 if (list_empty(&block->b_list)) in nlmsvc_traverse_blocks()
326 kref_get(&block->b_count); in nlmsvc_traverse_blocks()
328 nlmsvc_unlink_block(block); in nlmsvc_traverse_blocks()
329 nlmsvc_release_block(block); in nlmsvc_traverse_blocks()
373 nlmsvc_defer_lock_rqst(struct svc_rqst *rqstp, struct nlm_block *block) in nlmsvc_defer_lock_rqst() argument
377 block->b_flags |= B_QUEUED; in nlmsvc_defer_lock_rqst()
379 nlmsvc_insert_block(block, NLM_TIMEOUT); in nlmsvc_defer_lock_rqst()
381 block->b_cache_req = &rqstp->rq_chandle; in nlmsvc_defer_lock_rqst()
383 block->b_deferred_req = in nlmsvc_defer_lock_rqst()
384 rqstp->rq_chandle.defer(block->b_cache_req); in nlmsvc_defer_lock_rqst()
385 if (block->b_deferred_req != NULL) in nlmsvc_defer_lock_rqst()
388 dprintk("lockd: nlmsvc_defer_lock_rqst block %p flags %d status %d\n", in nlmsvc_defer_lock_rqst()
389 block, block->b_flags, ntohl(status)); in nlmsvc_defer_lock_rqst()
395 * Attempt to establish a lock, and if it can't be granted, block it
403 struct nlm_block *block = NULL; in nlmsvc_lock() local
417 /* Get existing block (in case client is busy-waiting) in nlmsvc_lock()
418 * or create new block in nlmsvc_lock()
420 block = nlmsvc_lookup_block(file, lock); in nlmsvc_lock()
421 if (block == NULL) { in nlmsvc_lock()
422 block = nlmsvc_create_block(rqstp, host, file, lock, cookie); in nlmsvc_lock()
424 if (block == NULL) in nlmsvc_lock()
426 lock = &block->b_call->a_args.lock; in nlmsvc_lock()
430 if (block->b_flags & B_QUEUED) { in nlmsvc_lock()
431 dprintk("lockd: nlmsvc_lock deferred block %p flags %d\n", in nlmsvc_lock()
432 block, block->b_flags); in nlmsvc_lock()
433 if (block->b_granted) { in nlmsvc_lock()
434 nlmsvc_unlink_block(block); in nlmsvc_lock()
438 if (block->b_flags & B_TIMED_OUT) { in nlmsvc_lock()
439 nlmsvc_unlink_block(block); in nlmsvc_lock()
470 * to put it back on lockd's block list in nlmsvc_lock()
481 ret = nlmsvc_defer_lock_rqst(rqstp, block); in nlmsvc_lock()
494 nlmsvc_insert_block(block, NLM_NEVER); in nlmsvc_lock()
497 nlmsvc_release_block(block); in nlmsvc_lock()
560 * afterwards. In this case the block will still be there, and hence
594 struct nlm_block *block; in nlmsvc_cancel_blocked() local
608 block = nlmsvc_lookup_block(file, lock); in nlmsvc_cancel_blocked()
610 if (block != NULL) { in nlmsvc_cancel_blocked()
611 vfs_cancel_lock(block->b_file->f_file, in nlmsvc_cancel_blocked()
612 &block->b_call->a_args.lock.fl); in nlmsvc_cancel_blocked()
613 status = nlmsvc_unlink_block(block); in nlmsvc_cancel_blocked()
614 nlmsvc_release_block(block); in nlmsvc_cancel_blocked()
624 * In all cases it will move the block to the head of nlm_blocked q where
629 nlmsvc_update_deferred_block(struct nlm_block *block, int result) in nlmsvc_update_deferred_block() argument
631 block->b_flags |= B_GOT_CALLBACK; in nlmsvc_update_deferred_block()
633 block->b_granted = 1; in nlmsvc_update_deferred_block()
635 block->b_flags |= B_TIMED_OUT; in nlmsvc_update_deferred_block()
640 struct nlm_block *block; in nlmsvc_grant_deferred() local
644 list_for_each_entry(block, &nlm_blocked, b_list) { in nlmsvc_grant_deferred()
645 if (nlm_compare_locks(&block->b_call->a_args.lock.fl, fl)) { in nlmsvc_grant_deferred()
646 dprintk("lockd: nlmsvc_notify_blocked block %p flags %d\n", in nlmsvc_grant_deferred()
647 block, block->b_flags); in nlmsvc_grant_deferred()
648 if (block->b_flags & B_QUEUED) { in nlmsvc_grant_deferred()
649 if (block->b_flags & B_TIMED_OUT) { in nlmsvc_grant_deferred()
653 nlmsvc_update_deferred_block(block, result); in nlmsvc_grant_deferred()
655 block->b_granted = 1; in nlmsvc_grant_deferred()
657 nlmsvc_insert_block_locked(block, 0); in nlmsvc_grant_deferred()
658 svc_wake_up(block->b_daemon); in nlmsvc_grant_deferred()
665 printk(KERN_WARNING "lockd: grant for unknown block\n"); in nlmsvc_grant_deferred()
674 * the block to the head of nlm_blocked where it can be picked up by lockd.
679 struct nlm_block *block; in nlmsvc_notify_blocked() local
681 dprintk("lockd: VFS unblock notification for block %p\n", fl); in nlmsvc_notify_blocked()
683 list_for_each_entry(block, &nlm_blocked, b_list) { in nlmsvc_notify_blocked()
684 if (nlm_compare_locks(&block->b_call->a_args.lock.fl, fl)) { in nlmsvc_notify_blocked()
685 nlmsvc_insert_block_locked(block, 0); in nlmsvc_notify_blocked()
687 svc_wake_up(block->b_daemon); in nlmsvc_notify_blocked()
692 printk(KERN_WARNING "lockd: notification for unknown block!\n"); in nlmsvc_notify_blocked()
730 nlmsvc_grant_blocked(struct nlm_block *block) in nlmsvc_grant_blocked() argument
732 struct nlm_file *file = block->b_file; in nlmsvc_grant_blocked()
733 struct nlm_lock *lock = &block->b_call->a_args.lock; in nlmsvc_grant_blocked()
737 dprintk("lockd: grant blocked lock %p\n", block); in nlmsvc_grant_blocked()
739 kref_get(&block->b_count); in nlmsvc_grant_blocked()
741 /* Unlink block request from list */ in nlmsvc_grant_blocked()
742 nlmsvc_unlink_block(block); in nlmsvc_grant_blocked()
747 if (block->b_granted) { in nlmsvc_grant_blocked()
748 nlm_rebind_host(block->b_host); in nlmsvc_grant_blocked()
769 nlmsvc_insert_block(block, NLM_NEVER); in nlmsvc_grant_blocked()
770 nlmsvc_release_block(block); in nlmsvc_grant_blocked()
775 nlmsvc_insert_block(block, 10 * HZ); in nlmsvc_grant_blocked()
776 nlmsvc_release_block(block); in nlmsvc_grant_blocked()
783 block->b_granted = 1; in nlmsvc_grant_blocked()
785 /* keep block on the list, but don't reattempt until the RPC in nlmsvc_grant_blocked()
788 nlmsvc_insert_block(block, NLM_NEVER); in nlmsvc_grant_blocked()
793 error = nlm_async_call(block->b_call, NLMPROC_GRANTED_MSG, in nlmsvc_grant_blocked()
798 nlmsvc_insert_block(block, 10 * HZ); in nlmsvc_grant_blocked()
812 struct nlm_block *block = call->a_block; in nlmsvc_grant_callback() local
818 /* if the block is not on a list at this point then it has in nlmsvc_grant_callback()
821 * FIXME: it's possible that the block is removed from the list in nlmsvc_grant_callback()
826 if (list_empty(&block->b_list)) in nlmsvc_grant_callback()
830 * move the block towards the head of the queue only, no harm in nlmsvc_grant_callback()
839 nlmsvc_insert_block_locked(block, timeout); in nlmsvc_grant_callback()
840 svc_wake_up(block->b_daemon); in nlmsvc_grant_callback()
862 * block.
867 struct nlm_block *block; in nlmsvc_grant_reply() local
871 if (!(block = nlmsvc_find_block(cookie))) in nlmsvc_grant_reply()
876 nlmsvc_insert_block(block, 10 * HZ); in nlmsvc_grant_reply()
880 * In both cases, the block should be removed. in nlmsvc_grant_reply()
882 nlmsvc_unlink_block(block); in nlmsvc_grant_reply()
884 nlmsvc_release_block(block); in nlmsvc_grant_reply()
887 /* Helper function to handle retry of a deferred block.
892 retry_deferred_block(struct nlm_block *block) in retry_deferred_block() argument
894 if (!(block->b_flags & B_GOT_CALLBACK)) in retry_deferred_block()
895 block->b_flags |= B_TIMED_OUT; in retry_deferred_block()
896 nlmsvc_insert_block(block, NLM_TIMEOUT); in retry_deferred_block()
897 dprintk("revisit block %p flags %d\n", block, block->b_flags); in retry_deferred_block()
898 if (block->b_deferred_req) { in retry_deferred_block()
899 block->b_deferred_req->revisit(block->b_deferred_req, 0); in retry_deferred_block()
900 block->b_deferred_req = NULL; in retry_deferred_block()
913 struct nlm_block *block; in nlmsvc_retry_blocked() local
917 block = list_entry(nlm_blocked.next, struct nlm_block, b_list); in nlmsvc_retry_blocked()
919 if (block->b_when == NLM_NEVER) in nlmsvc_retry_blocked()
921 if (time_after(block->b_when, jiffies)) { in nlmsvc_retry_blocked()
922 timeout = block->b_when - jiffies; in nlmsvc_retry_blocked()
928 block, block->b_when); in nlmsvc_retry_blocked()
929 if (block->b_flags & B_QUEUED) { in nlmsvc_retry_blocked()
930 dprintk("nlmsvc_retry_blocked delete block (%p, granted=%d, flags=%d)\n", in nlmsvc_retry_blocked()
931 block, block->b_granted, block->b_flags); in nlmsvc_retry_blocked()
932 retry_deferred_block(block); in nlmsvc_retry_blocked()
934 nlmsvc_grant_blocked(block); in nlmsvc_retry_blocked()