Lines Matching +full:num +full:- +full:cs
3 Copyright (C) 2001-2008 Miklos Szeredi <miklos@szeredi.hu>
37 * Lockless access is OK, because file->private data is set in fuse_get_dev()
40 return READ_ONCE(file->private_data); in fuse_get_dev()
45 INIT_LIST_HEAD(&req->list); in fuse_request_init()
46 INIT_LIST_HEAD(&req->intr_entry); in fuse_request_init()
47 init_waitqueue_head(&req->waitq); in fuse_request_init()
48 refcount_set(&req->count, 1); in fuse_request_init()
49 __set_bit(FR_PENDING, &req->flags); in fuse_request_init()
50 req->fm = fm; in fuse_request_init()
69 refcount_inc(&req->count); in __fuse_get_request()
75 refcount_dec(&req->count); in __fuse_put_request()
82 fc->initialized = 1; in fuse_set_initialized()
87 return !fc->initialized || (for_background && fc->blocked); in fuse_block_alloc()
93 * lockess check of fc->connected is okay, because atomic_dec_and_test() in fuse_drop_waiting()
95 * to ensure no wake-up is missed. in fuse_drop_waiting()
97 if (atomic_dec_and_test(&fc->num_waiting) && in fuse_drop_waiting()
98 !READ_ONCE(fc->connected)) { in fuse_drop_waiting()
100 wake_up_all(&fc->blocked_waitq); in fuse_drop_waiting()
108 struct fuse_conn *fc = fm->fc; in fuse_get_req()
111 atomic_inc(&fc->num_waiting); in fuse_get_req()
114 err = -EINTR; in fuse_get_req()
115 if (wait_event_killable_exclusive(fc->blocked_waitq, in fuse_get_req()
122 err = -ENOTCONN; in fuse_get_req()
123 if (!fc->connected) in fuse_get_req()
126 err = -ECONNREFUSED; in fuse_get_req()
127 if (fc->conn_error) in fuse_get_req()
131 err = -ENOMEM; in fuse_get_req()
134 wake_up(&fc->blocked_waitq); in fuse_get_req()
138 req->in.h.uid = from_kuid(fc->user_ns, current_fsuid()); in fuse_get_req()
139 req->in.h.gid = from_kgid(fc->user_ns, current_fsgid()); in fuse_get_req()
140 req->in.h.pid = pid_nr_ns(task_pid(current), fc->pid_ns); in fuse_get_req()
142 __set_bit(FR_WAITING, &req->flags); in fuse_get_req()
144 __set_bit(FR_BACKGROUND, &req->flags); in fuse_get_req()
146 if (unlikely(req->in.h.uid == ((uid_t)-1) || in fuse_get_req()
147 req->in.h.gid == ((gid_t)-1))) { in fuse_get_req()
149 return ERR_PTR(-EOVERFLOW); in fuse_get_req()
160 struct fuse_conn *fc = req->fm->fc; in fuse_put_request()
162 if (refcount_dec_and_test(&req->count)) { in fuse_put_request()
163 if (test_bit(FR_BACKGROUND, &req->flags)) { in fuse_put_request()
168 spin_lock(&fc->bg_lock); in fuse_put_request()
169 if (!fc->blocked) in fuse_put_request()
170 wake_up(&fc->blocked_waitq); in fuse_put_request()
171 spin_unlock(&fc->bg_lock); in fuse_put_request()
174 if (test_bit(FR_WAITING, &req->flags)) { in fuse_put_request()
175 __clear_bit(FR_WAITING, &req->flags); in fuse_put_request()
197 fiq->reqctr += FUSE_REQ_ID_STEP; in fuse_get_unique()
198 return fiq->reqctr; in fuse_get_unique()
208 * A new request is available, wake fiq->waitq
211 __releases(fiq->lock) in fuse_dev_wake_and_unlock()
213 wake_up(&fiq->waitq); in fuse_dev_wake_and_unlock()
214 kill_fasync(&fiq->fasync, SIGIO, POLL_IN); in fuse_dev_wake_and_unlock()
215 spin_unlock(&fiq->lock); in fuse_dev_wake_and_unlock()
227 __releases(fiq->lock) in queue_request_and_unlock()
229 req->in.h.len = sizeof(struct fuse_in_header) + in queue_request_and_unlock()
230 fuse_len_args(req->args->in_numargs, in queue_request_and_unlock()
231 (struct fuse_arg *) req->args->in_args); in queue_request_and_unlock()
232 list_add_tail(&req->list, &fiq->pending); in queue_request_and_unlock()
233 fiq->ops->wake_pending_and_unlock(fiq); in queue_request_and_unlock()
239 struct fuse_iqueue *fiq = &fc->iq; in fuse_queue_forget()
241 forget->forget_one.nodeid = nodeid; in fuse_queue_forget()
242 forget->forget_one.nlookup = nlookup; in fuse_queue_forget()
244 spin_lock(&fiq->lock); in fuse_queue_forget()
245 if (fiq->connected) { in fuse_queue_forget()
246 fiq->forget_list_tail->next = forget; in fuse_queue_forget()
247 fiq->forget_list_tail = forget; in fuse_queue_forget()
248 fiq->ops->wake_forget_and_unlock(fiq); in fuse_queue_forget()
251 spin_unlock(&fiq->lock); in fuse_queue_forget()
257 struct fuse_iqueue *fiq = &fc->iq; in flush_bg_queue()
259 while (fc->active_background < fc->max_background && in flush_bg_queue()
260 !list_empty(&fc->bg_queue)) { in flush_bg_queue()
263 req = list_first_entry(&fc->bg_queue, struct fuse_req, list); in flush_bg_queue()
264 list_del(&req->list); in flush_bg_queue()
265 fc->active_background++; in flush_bg_queue()
266 spin_lock(&fiq->lock); in flush_bg_queue()
267 req->in.h.unique = fuse_get_unique(fiq); in flush_bg_queue()
282 struct fuse_mount *fm = req->fm; in fuse_request_end()
283 struct fuse_conn *fc = fm->fc; in fuse_request_end()
284 struct fuse_iqueue *fiq = &fc->iq; in fuse_request_end()
286 if (test_and_set_bit(FR_FINISHED, &req->flags)) in fuse_request_end()
294 if (test_bit(FR_INTERRUPTED, &req->flags)) { in fuse_request_end()
295 spin_lock(&fiq->lock); in fuse_request_end()
296 list_del_init(&req->intr_entry); in fuse_request_end()
297 spin_unlock(&fiq->lock); in fuse_request_end()
299 WARN_ON(test_bit(FR_PENDING, &req->flags)); in fuse_request_end()
300 WARN_ON(test_bit(FR_SENT, &req->flags)); in fuse_request_end()
301 if (test_bit(FR_BACKGROUND, &req->flags)) { in fuse_request_end()
302 spin_lock(&fc->bg_lock); in fuse_request_end()
303 clear_bit(FR_BACKGROUND, &req->flags); in fuse_request_end()
304 if (fc->num_background == fc->max_background) { in fuse_request_end()
305 fc->blocked = 0; in fuse_request_end()
306 wake_up(&fc->blocked_waitq); in fuse_request_end()
307 } else if (!fc->blocked) { in fuse_request_end()
311 * fc->blocked with waiters with the wake_up() call in fuse_request_end()
314 if (waitqueue_active(&fc->blocked_waitq)) in fuse_request_end()
315 wake_up(&fc->blocked_waitq); in fuse_request_end()
318 if (fc->num_background == fc->congestion_threshold && fm->sb) { in fuse_request_end()
319 clear_bdi_congested(fm->sb->s_bdi, BLK_RW_SYNC); in fuse_request_end()
320 clear_bdi_congested(fm->sb->s_bdi, BLK_RW_ASYNC); in fuse_request_end()
322 fc->num_background--; in fuse_request_end()
323 fc->active_background--; in fuse_request_end()
325 spin_unlock(&fc->bg_lock); in fuse_request_end()
328 wake_up(&req->waitq); in fuse_request_end()
331 if (test_bit(FR_ASYNC, &req->flags)) in fuse_request_end()
332 req->args->end(fm, req->args, req->out.h.error); in fuse_request_end()
340 struct fuse_iqueue *fiq = &req->fm->fc->iq; in queue_interrupt()
342 spin_lock(&fiq->lock); in queue_interrupt()
344 if (unlikely(!test_bit(FR_INTERRUPTED, &req->flags))) { in queue_interrupt()
345 spin_unlock(&fiq->lock); in queue_interrupt()
346 return -EINVAL; in queue_interrupt()
349 if (list_empty(&req->intr_entry)) { in queue_interrupt()
350 list_add_tail(&req->intr_entry, &fiq->interrupts); in queue_interrupt()
356 if (test_bit(FR_FINISHED, &req->flags)) { in queue_interrupt()
357 list_del_init(&req->intr_entry); in queue_interrupt()
358 spin_unlock(&fiq->lock); in queue_interrupt()
361 fiq->ops->wake_interrupt_and_unlock(fiq); in queue_interrupt()
363 spin_unlock(&fiq->lock); in queue_interrupt()
370 struct fuse_conn *fc = req->fm->fc; in request_wait_answer()
371 struct fuse_iqueue *fiq = &fc->iq; in request_wait_answer()
374 if (!fc->no_interrupt) { in request_wait_answer()
376 err = wait_event_interruptible(req->waitq, in request_wait_answer()
377 test_bit(FR_FINISHED, &req->flags)); in request_wait_answer()
381 set_bit(FR_INTERRUPTED, &req->flags); in request_wait_answer()
384 if (test_bit(FR_SENT, &req->flags)) in request_wait_answer()
388 if (!test_bit(FR_FORCE, &req->flags)) { in request_wait_answer()
390 err = wait_event_killable(req->waitq, in request_wait_answer()
391 test_bit(FR_FINISHED, &req->flags)); in request_wait_answer()
395 spin_lock(&fiq->lock); in request_wait_answer()
397 if (test_bit(FR_PENDING, &req->flags)) { in request_wait_answer()
398 list_del(&req->list); in request_wait_answer()
399 spin_unlock(&fiq->lock); in request_wait_answer()
401 req->out.h.error = -EINTR; in request_wait_answer()
404 spin_unlock(&fiq->lock); in request_wait_answer()
411 wait_event(req->waitq, test_bit(FR_FINISHED, &req->flags)); in request_wait_answer()
416 struct fuse_iqueue *fiq = &req->fm->fc->iq; in __fuse_request_send()
418 BUG_ON(test_bit(FR_BACKGROUND, &req->flags)); in __fuse_request_send()
419 spin_lock(&fiq->lock); in __fuse_request_send()
420 if (!fiq->connected) { in __fuse_request_send()
421 spin_unlock(&fiq->lock); in __fuse_request_send()
422 req->out.h.error = -ENOTCONN; in __fuse_request_send()
424 req->in.h.unique = fuse_get_unique(fiq); in __fuse_request_send()
438 if (fc->minor < 4 && args->opcode == FUSE_STATFS) in fuse_adjust_compat()
439 args->out_args[0].size = FUSE_COMPAT_STATFS_SIZE; in fuse_adjust_compat()
441 if (fc->minor < 9) { in fuse_adjust_compat()
442 switch (args->opcode) { in fuse_adjust_compat()
449 args->out_args[0].size = FUSE_COMPAT_ENTRY_OUT_SIZE; in fuse_adjust_compat()
453 args->out_args[0].size = FUSE_COMPAT_ATTR_OUT_SIZE; in fuse_adjust_compat()
457 if (fc->minor < 12) { in fuse_adjust_compat()
458 switch (args->opcode) { in fuse_adjust_compat()
460 args->in_args[0].size = sizeof(struct fuse_open_in); in fuse_adjust_compat()
463 args->in_args[0].size = FUSE_COMPAT_MKNOD_IN_SIZE; in fuse_adjust_compat()
471 struct fuse_conn *fc = req->fm->fc; in fuse_force_creds()
473 req->in.h.uid = from_kuid_munged(fc->user_ns, current_fsuid()); in fuse_force_creds()
474 req->in.h.gid = from_kgid_munged(fc->user_ns, current_fsgid()); in fuse_force_creds()
475 req->in.h.pid = pid_nr_ns(task_pid(current), fc->pid_ns); in fuse_force_creds()
480 req->in.h.opcode = args->opcode; in fuse_args_to_req()
481 req->in.h.nodeid = args->nodeid; in fuse_args_to_req()
482 req->args = args; in fuse_args_to_req()
483 if (args->end) in fuse_args_to_req()
484 __set_bit(FR_ASYNC, &req->flags); in fuse_args_to_req()
489 struct fuse_conn *fc = fm->fc; in fuse_simple_request()
493 if (args->force) { in fuse_simple_request()
494 atomic_inc(&fc->num_waiting); in fuse_simple_request()
497 if (!args->nocreds) in fuse_simple_request()
500 __set_bit(FR_WAITING, &req->flags); in fuse_simple_request()
501 __set_bit(FR_FORCE, &req->flags); in fuse_simple_request()
503 WARN_ON(args->nocreds); in fuse_simple_request()
509 /* Needs to be done after fuse_get_req() so that fc->minor is valid */ in fuse_simple_request()
513 if (!args->noreply) in fuse_simple_request()
514 __set_bit(FR_ISREPLY, &req->flags); in fuse_simple_request()
516 ret = req->out.h.error; in fuse_simple_request()
517 if (!ret && args->out_argvar) { in fuse_simple_request()
518 BUG_ON(args->out_numargs == 0); in fuse_simple_request()
519 ret = args->out_args[args->out_numargs - 1].size; in fuse_simple_request()
528 struct fuse_mount *fm = req->fm; in fuse_request_queue_background()
529 struct fuse_conn *fc = fm->fc; in fuse_request_queue_background()
532 WARN_ON(!test_bit(FR_BACKGROUND, &req->flags)); in fuse_request_queue_background()
533 if (!test_bit(FR_WAITING, &req->flags)) { in fuse_request_queue_background()
534 __set_bit(FR_WAITING, &req->flags); in fuse_request_queue_background()
535 atomic_inc(&fc->num_waiting); in fuse_request_queue_background()
537 __set_bit(FR_ISREPLY, &req->flags); in fuse_request_queue_background()
538 spin_lock(&fc->bg_lock); in fuse_request_queue_background()
539 if (likely(fc->connected)) { in fuse_request_queue_background()
540 fc->num_background++; in fuse_request_queue_background()
541 if (fc->num_background == fc->max_background) in fuse_request_queue_background()
542 fc->blocked = 1; in fuse_request_queue_background()
543 if (fc->num_background == fc->congestion_threshold && fm->sb) { in fuse_request_queue_background()
544 set_bdi_congested(fm->sb->s_bdi, BLK_RW_SYNC); in fuse_request_queue_background()
545 set_bdi_congested(fm->sb->s_bdi, BLK_RW_ASYNC); in fuse_request_queue_background()
547 list_add_tail(&req->list, &fc->bg_queue); in fuse_request_queue_background()
551 spin_unlock(&fc->bg_lock); in fuse_request_queue_background()
561 if (args->force) { in fuse_simple_background()
562 WARN_ON(!args->nocreds); in fuse_simple_background()
565 return -ENOMEM; in fuse_simple_background()
566 __set_bit(FR_BACKGROUND, &req->flags); in fuse_simple_background()
568 WARN_ON(args->nocreds); in fuse_simple_background()
578 return -ENOTCONN; in fuse_simple_background()
589 struct fuse_iqueue *fiq = &fm->fc->iq; in fuse_simple_notify_reply()
596 __clear_bit(FR_ISREPLY, &req->flags); in fuse_simple_notify_reply()
597 req->in.h.unique = unique; in fuse_simple_notify_reply()
601 spin_lock(&fiq->lock); in fuse_simple_notify_reply()
602 if (fiq->connected) { in fuse_simple_notify_reply()
605 err = -ENODEV; in fuse_simple_notify_reply()
606 spin_unlock(&fiq->lock); in fuse_simple_notify_reply()
615 * anything that could cause a page-fault. If the request was already
622 spin_lock(&req->waitq.lock); in lock_request()
623 if (test_bit(FR_ABORTED, &req->flags)) in lock_request()
624 err = -ENOENT; in lock_request()
626 set_bit(FR_LOCKED, &req->flags); in lock_request()
627 spin_unlock(&req->waitq.lock); in lock_request()
640 spin_lock(&req->waitq.lock); in unlock_request()
641 if (test_bit(FR_ABORTED, &req->flags)) in unlock_request()
642 err = -ENOENT; in unlock_request()
644 clear_bit(FR_LOCKED, &req->flags); in unlock_request()
645 spin_unlock(&req->waitq.lock); in unlock_request()
664 static void fuse_copy_init(struct fuse_copy_state *cs, int write, in fuse_copy_init() argument
667 memset(cs, 0, sizeof(*cs)); in fuse_copy_init()
668 cs->write = write; in fuse_copy_init()
669 cs->iter = iter; in fuse_copy_init()
673 static void fuse_copy_finish(struct fuse_copy_state *cs) in fuse_copy_finish() argument
675 if (cs->currbuf) { in fuse_copy_finish()
676 struct pipe_buffer *buf = cs->currbuf; in fuse_copy_finish()
678 if (cs->write) in fuse_copy_finish()
679 buf->len = PAGE_SIZE - cs->len; in fuse_copy_finish()
680 cs->currbuf = NULL; in fuse_copy_finish()
681 } else if (cs->pg) { in fuse_copy_finish()
682 if (cs->write) { in fuse_copy_finish()
683 flush_dcache_page(cs->pg); in fuse_copy_finish()
684 set_page_dirty_lock(cs->pg); in fuse_copy_finish()
686 put_page(cs->pg); in fuse_copy_finish()
688 cs->pg = NULL; in fuse_copy_finish()
695 static int fuse_copy_fill(struct fuse_copy_state *cs) in fuse_copy_fill() argument
700 err = unlock_request(cs->req); in fuse_copy_fill()
704 fuse_copy_finish(cs); in fuse_copy_fill()
705 if (cs->pipebufs) { in fuse_copy_fill()
706 struct pipe_buffer *buf = cs->pipebufs; in fuse_copy_fill()
708 if (!cs->write) { in fuse_copy_fill()
709 err = pipe_buf_confirm(cs->pipe, buf); in fuse_copy_fill()
713 BUG_ON(!cs->nr_segs); in fuse_copy_fill()
714 cs->currbuf = buf; in fuse_copy_fill()
715 cs->pg = buf->page; in fuse_copy_fill()
716 cs->offset = buf->offset; in fuse_copy_fill()
717 cs->len = buf->len; in fuse_copy_fill()
718 cs->pipebufs++; in fuse_copy_fill()
719 cs->nr_segs--; in fuse_copy_fill()
721 if (cs->nr_segs >= cs->pipe->max_usage) in fuse_copy_fill()
722 return -EIO; in fuse_copy_fill()
726 return -ENOMEM; in fuse_copy_fill()
728 buf->page = page; in fuse_copy_fill()
729 buf->offset = 0; in fuse_copy_fill()
730 buf->len = 0; in fuse_copy_fill()
732 cs->currbuf = buf; in fuse_copy_fill()
733 cs->pg = page; in fuse_copy_fill()
734 cs->offset = 0; in fuse_copy_fill()
735 cs->len = PAGE_SIZE; in fuse_copy_fill()
736 cs->pipebufs++; in fuse_copy_fill()
737 cs->nr_segs++; in fuse_copy_fill()
741 err = iov_iter_get_pages(cs->iter, &page, PAGE_SIZE, 1, &off); in fuse_copy_fill()
745 cs->len = err; in fuse_copy_fill()
746 cs->offset = off; in fuse_copy_fill()
747 cs->pg = page; in fuse_copy_fill()
748 iov_iter_advance(cs->iter, err); in fuse_copy_fill()
751 return lock_request(cs->req); in fuse_copy_fill()
755 static int fuse_copy_do(struct fuse_copy_state *cs, void **val, unsigned *size) in fuse_copy_do() argument
757 unsigned ncpy = min(*size, cs->len); in fuse_copy_do()
759 void *pgaddr = kmap_atomic(cs->pg); in fuse_copy_do()
760 void *buf = pgaddr + cs->offset; in fuse_copy_do()
762 if (cs->write) in fuse_copy_do()
770 *size -= ncpy; in fuse_copy_do()
771 cs->len -= ncpy; in fuse_copy_do()
772 cs->offset += ncpy; in fuse_copy_do()
779 page->mapping != NULL || in fuse_check_page()
780 (page->flags & PAGE_FLAGS_CHECK_AT_PREP & in fuse_check_page()
795 static int fuse_try_move_page(struct fuse_copy_state *cs, struct page **pagep) in fuse_try_move_page() argument
800 struct pipe_buffer *buf = cs->pipebufs; in fuse_try_move_page()
803 err = unlock_request(cs->req); in fuse_try_move_page()
807 fuse_copy_finish(cs); in fuse_try_move_page()
809 err = pipe_buf_confirm(cs->pipe, buf); in fuse_try_move_page()
813 BUG_ON(!cs->nr_segs); in fuse_try_move_page()
814 cs->currbuf = buf; in fuse_try_move_page()
815 cs->len = buf->len; in fuse_try_move_page()
816 cs->pipebufs++; in fuse_try_move_page()
817 cs->nr_segs--; in fuse_try_move_page()
819 if (cs->len != PAGE_SIZE) in fuse_try_move_page()
822 if (!pipe_buf_try_steal(cs->pipe, buf)) in fuse_try_move_page()
825 newpage = buf->page; in fuse_try_move_page()
856 if (!(buf->flags & PIPE_BUF_FLAG_LRU)) in fuse_try_move_page()
860 spin_lock(&cs->req->waitq.lock); in fuse_try_move_page()
861 if (test_bit(FR_ABORTED, &cs->req->flags)) in fuse_try_move_page()
862 err = -ENOENT; in fuse_try_move_page()
865 spin_unlock(&cs->req->waitq.lock); in fuse_try_move_page()
874 /* Drop ref for ap->pages[] array */ in fuse_try_move_page()
876 cs->len = 0; in fuse_try_move_page()
887 cs->pg = buf->page; in fuse_try_move_page()
888 cs->offset = buf->offset; in fuse_try_move_page()
890 err = lock_request(cs->req); in fuse_try_move_page()
897 static int fuse_ref_page(struct fuse_copy_state *cs, struct page *page, in fuse_ref_page() argument
903 if (cs->nr_segs >= cs->pipe->max_usage) in fuse_ref_page()
904 return -EIO; in fuse_ref_page()
907 err = unlock_request(cs->req); in fuse_ref_page()
913 fuse_copy_finish(cs); in fuse_ref_page()
915 buf = cs->pipebufs; in fuse_ref_page()
916 buf->page = page; in fuse_ref_page()
917 buf->offset = offset; in fuse_ref_page()
918 buf->len = count; in fuse_ref_page()
920 cs->pipebufs++; in fuse_ref_page()
921 cs->nr_segs++; in fuse_ref_page()
922 cs->len = 0; in fuse_ref_page()
931 static int fuse_copy_page(struct fuse_copy_state *cs, struct page **pagep, in fuse_copy_page() argument
941 if (cs->write && cs->pipebufs && page) { in fuse_copy_page()
946 if (cs->req->args->user_pages) { in fuse_copy_page()
947 err = fuse_copy_fill(cs); in fuse_copy_page()
951 return fuse_ref_page(cs, page, offset, count); in fuse_copy_page()
953 } else if (!cs->len) { in fuse_copy_page()
954 if (cs->move_pages && page && in fuse_copy_page()
956 err = fuse_try_move_page(cs, pagep); in fuse_copy_page()
960 err = fuse_copy_fill(cs); in fuse_copy_page()
968 offset += fuse_copy_do(cs, &buf, &count); in fuse_copy_page()
971 offset += fuse_copy_do(cs, NULL, &count); in fuse_copy_page()
973 if (page && !cs->write) in fuse_copy_page()
979 static int fuse_copy_pages(struct fuse_copy_state *cs, unsigned nbytes, in fuse_copy_pages() argument
983 struct fuse_req *req = cs->req; in fuse_copy_pages()
984 struct fuse_args_pages *ap = container_of(req->args, typeof(*ap), args); in fuse_copy_pages()
987 for (i = 0; i < ap->num_pages && (nbytes || zeroing); i++) { in fuse_copy_pages()
989 unsigned int offset = ap->descs[i].offset; in fuse_copy_pages()
990 unsigned int count = min(nbytes, ap->descs[i].length); in fuse_copy_pages()
992 err = fuse_copy_page(cs, &ap->pages[i], offset, count, zeroing); in fuse_copy_pages()
996 nbytes -= count; in fuse_copy_pages()
1002 static int fuse_copy_one(struct fuse_copy_state *cs, void *val, unsigned size) in fuse_copy_one() argument
1005 if (!cs->len) { in fuse_copy_one()
1006 int err = fuse_copy_fill(cs); in fuse_copy_one()
1010 fuse_copy_do(cs, &val, &size); in fuse_copy_one()
1016 static int fuse_copy_args(struct fuse_copy_state *cs, unsigned numargs, in fuse_copy_args() argument
1025 if (i == numargs - 1 && argpages) in fuse_copy_args()
1026 err = fuse_copy_pages(cs, arg->size, zeroing); in fuse_copy_args()
1028 err = fuse_copy_one(cs, arg->value, arg->size); in fuse_copy_args()
1035 return fiq->forget_list_head.next != NULL; in forget_pending()
1040 return !list_empty(&fiq->pending) || !list_empty(&fiq->interrupts) || in request_pending()
1050 * Called with fiq->lock held, releases it
1053 struct fuse_copy_state *cs, in fuse_read_interrupt() argument
1055 __releases(fiq->lock) in fuse_read_interrupt()
1062 list_del_init(&req->intr_entry); in fuse_read_interrupt()
1067 ih.unique = (req->in.h.unique | FUSE_INT_REQ_BIT); in fuse_read_interrupt()
1068 arg.unique = req->in.h.unique; in fuse_read_interrupt()
1070 spin_unlock(&fiq->lock); in fuse_read_interrupt()
1072 return -EINVAL; in fuse_read_interrupt()
1074 err = fuse_copy_one(cs, &ih, sizeof(ih)); in fuse_read_interrupt()
1076 err = fuse_copy_one(cs, &arg, sizeof(arg)); in fuse_read_interrupt()
1077 fuse_copy_finish(cs); in fuse_read_interrupt()
1086 struct fuse_forget_link *head = fiq->forget_list_head.next; in fuse_dequeue_forget()
1091 newhead = &(*newhead)->next; in fuse_dequeue_forget()
1093 fiq->forget_list_head.next = *newhead; in fuse_dequeue_forget()
1095 if (fiq->forget_list_head.next == NULL) in fuse_dequeue_forget()
1096 fiq->forget_list_tail = &fiq->forget_list_head; in fuse_dequeue_forget()
1106 struct fuse_copy_state *cs, in fuse_read_single_forget() argument
1108 __releases(fiq->lock) in fuse_read_single_forget()
1113 .nlookup = forget->forget_one.nlookup, in fuse_read_single_forget()
1117 .nodeid = forget->forget_one.nodeid, in fuse_read_single_forget()
1122 spin_unlock(&fiq->lock); in fuse_read_single_forget()
1125 return -EINVAL; in fuse_read_single_forget()
1127 err = fuse_copy_one(cs, &ih, sizeof(ih)); in fuse_read_single_forget()
1129 err = fuse_copy_one(cs, &arg, sizeof(arg)); in fuse_read_single_forget()
1130 fuse_copy_finish(cs); in fuse_read_single_forget()
1139 struct fuse_copy_state *cs, size_t nbytes) in fuse_read_batch_forget() argument
1140 __releases(fiq->lock) in fuse_read_batch_forget()
1154 spin_unlock(&fiq->lock); in fuse_read_batch_forget()
1155 return -EINVAL; in fuse_read_batch_forget()
1158 max_forgets = (nbytes - ih.len) / sizeof(struct fuse_forget_one); in fuse_read_batch_forget()
1160 spin_unlock(&fiq->lock); in fuse_read_batch_forget()
1164 err = fuse_copy_one(cs, &ih, sizeof(ih)); in fuse_read_batch_forget()
1166 err = fuse_copy_one(cs, &arg, sizeof(arg)); in fuse_read_batch_forget()
1172 err = fuse_copy_one(cs, &forget->forget_one, in fuse_read_batch_forget()
1173 sizeof(forget->forget_one)); in fuse_read_batch_forget()
1175 head = forget->next; in fuse_read_batch_forget()
1179 fuse_copy_finish(cs); in fuse_read_batch_forget()
1188 struct fuse_copy_state *cs, in fuse_read_forget() argument
1190 __releases(fiq->lock) in fuse_read_forget()
1192 if (fc->minor < 16 || fiq->forget_list_head.next->next == NULL) in fuse_read_forget()
1193 return fuse_read_single_forget(fiq, cs, nbytes); in fuse_read_forget()
1195 return fuse_read_batch_forget(fiq, cs, nbytes); in fuse_read_forget()
1208 struct fuse_copy_state *cs, size_t nbytes) in fuse_dev_do_read() argument
1211 struct fuse_conn *fc = fud->fc; in fuse_dev_do_read()
1212 struct fuse_iqueue *fiq = &fc->iq; in fuse_dev_do_read()
1213 struct fuse_pqueue *fpq = &fud->pq; in fuse_dev_do_read()
1220 * Require sane minimum read buffer - that has capacity for fixed part in fuse_dev_do_read()
1234 fc->max_write)) in fuse_dev_do_read()
1235 return -EINVAL; in fuse_dev_do_read()
1239 spin_lock(&fiq->lock); in fuse_dev_do_read()
1240 if (!fiq->connected || request_pending(fiq)) in fuse_dev_do_read()
1242 spin_unlock(&fiq->lock); in fuse_dev_do_read()
1244 if (file->f_flags & O_NONBLOCK) in fuse_dev_do_read()
1245 return -EAGAIN; in fuse_dev_do_read()
1246 err = wait_event_interruptible_exclusive(fiq->waitq, in fuse_dev_do_read()
1247 !fiq->connected || request_pending(fiq)); in fuse_dev_do_read()
1252 if (!fiq->connected) { in fuse_dev_do_read()
1253 err = fc->aborted ? -ECONNABORTED : -ENODEV; in fuse_dev_do_read()
1257 if (!list_empty(&fiq->interrupts)) { in fuse_dev_do_read()
1258 req = list_entry(fiq->interrupts.next, struct fuse_req, in fuse_dev_do_read()
1260 return fuse_read_interrupt(fiq, cs, nbytes, req); in fuse_dev_do_read()
1264 if (list_empty(&fiq->pending) || fiq->forget_batch-- > 0) in fuse_dev_do_read()
1265 return fuse_read_forget(fc, fiq, cs, nbytes); in fuse_dev_do_read()
1267 if (fiq->forget_batch <= -8) in fuse_dev_do_read()
1268 fiq->forget_batch = 16; in fuse_dev_do_read()
1271 req = list_entry(fiq->pending.next, struct fuse_req, list); in fuse_dev_do_read()
1272 clear_bit(FR_PENDING, &req->flags); in fuse_dev_do_read()
1273 list_del_init(&req->list); in fuse_dev_do_read()
1274 spin_unlock(&fiq->lock); in fuse_dev_do_read()
1276 args = req->args; in fuse_dev_do_read()
1277 reqsize = req->in.h.len; in fuse_dev_do_read()
1281 req->out.h.error = -EIO; in fuse_dev_do_read()
1283 if (args->opcode == FUSE_SETXATTR) in fuse_dev_do_read()
1284 req->out.h.error = -E2BIG; in fuse_dev_do_read()
1288 spin_lock(&fpq->lock); in fuse_dev_do_read()
1290 * Must not put request on fpq->io queue after having been shut down by in fuse_dev_do_read()
1293 if (!fpq->connected) { in fuse_dev_do_read()
1294 req->out.h.error = err = -ECONNABORTED; in fuse_dev_do_read()
1298 list_add(&req->list, &fpq->io); in fuse_dev_do_read()
1299 spin_unlock(&fpq->lock); in fuse_dev_do_read()
1300 cs->req = req; in fuse_dev_do_read()
1301 err = fuse_copy_one(cs, &req->in.h, sizeof(req->in.h)); in fuse_dev_do_read()
1303 err = fuse_copy_args(cs, args->in_numargs, args->in_pages, in fuse_dev_do_read()
1304 (struct fuse_arg *) args->in_args, 0); in fuse_dev_do_read()
1305 fuse_copy_finish(cs); in fuse_dev_do_read()
1306 spin_lock(&fpq->lock); in fuse_dev_do_read()
1307 clear_bit(FR_LOCKED, &req->flags); in fuse_dev_do_read()
1308 if (!fpq->connected) { in fuse_dev_do_read()
1309 err = fc->aborted ? -ECONNABORTED : -ENODEV; in fuse_dev_do_read()
1313 req->out.h.error = -EIO; in fuse_dev_do_read()
1316 if (!test_bit(FR_ISREPLY, &req->flags)) { in fuse_dev_do_read()
1320 hash = fuse_req_hash(req->in.h.unique); in fuse_dev_do_read()
1321 list_move_tail(&req->list, &fpq->processing[hash]); in fuse_dev_do_read()
1323 set_bit(FR_SENT, &req->flags); in fuse_dev_do_read()
1324 spin_unlock(&fpq->lock); in fuse_dev_do_read()
1327 if (test_bit(FR_INTERRUPTED, &req->flags)) in fuse_dev_do_read()
1334 if (!test_bit(FR_PRIVATE, &req->flags)) in fuse_dev_do_read()
1335 list_del_init(&req->list); in fuse_dev_do_read()
1336 spin_unlock(&fpq->lock); in fuse_dev_do_read()
1341 spin_unlock(&fiq->lock); in fuse_dev_do_read()
1352 file->private_data = NULL; in fuse_dev_open()
1358 struct fuse_copy_state cs; in fuse_dev_read() local
1359 struct file *file = iocb->ki_filp; in fuse_dev_read()
1363 return -EPERM; in fuse_dev_read()
1366 return -EINVAL; in fuse_dev_read()
1368 fuse_copy_init(&cs, 1, to); in fuse_dev_read()
1370 return fuse_dev_do_read(fud, file, &cs, iov_iter_count(to)); in fuse_dev_read()
1380 struct fuse_copy_state cs; in fuse_dev_splice_read() local
1384 return -EPERM; in fuse_dev_splice_read()
1386 bufs = kvmalloc_array(pipe->max_usage, sizeof(struct pipe_buffer), in fuse_dev_splice_read()
1389 return -ENOMEM; in fuse_dev_splice_read()
1391 fuse_copy_init(&cs, 1, NULL); in fuse_dev_splice_read()
1392 cs.pipebufs = bufs; in fuse_dev_splice_read()
1393 cs.pipe = pipe; in fuse_dev_splice_read()
1394 ret = fuse_dev_do_read(fud, in, &cs, len); in fuse_dev_splice_read()
1398 if (pipe_occupancy(pipe->head, pipe->tail) + cs.nr_segs > pipe->max_usage) { in fuse_dev_splice_read()
1399 ret = -EIO; in fuse_dev_splice_read()
1403 for (ret = total = 0; page_nr < cs.nr_segs; total += ret) { in fuse_dev_splice_read()
1405 * Need to be careful about this. Having buf->ops in module in fuse_dev_splice_read()
1417 for (; page_nr < cs.nr_segs; page_nr++) in fuse_dev_splice_read()
1425 struct fuse_copy_state *cs) in fuse_notify_poll() argument
1428 int err = -EINVAL; in fuse_notify_poll()
1433 err = fuse_copy_one(cs, &outarg, sizeof(outarg)); in fuse_notify_poll()
1437 fuse_copy_finish(cs); in fuse_notify_poll()
1441 fuse_copy_finish(cs); in fuse_notify_poll()
1446 struct fuse_copy_state *cs) in fuse_notify_inval_inode() argument
1449 int err = -EINVAL; in fuse_notify_inval_inode()
1454 err = fuse_copy_one(cs, &outarg, sizeof(outarg)); in fuse_notify_inval_inode()
1457 fuse_copy_finish(cs); in fuse_notify_inval_inode()
1459 down_read(&fc->killsb); in fuse_notify_inval_inode()
1462 up_read(&fc->killsb); in fuse_notify_inval_inode()
1466 fuse_copy_finish(cs); in fuse_notify_inval_inode()
1471 struct fuse_copy_state *cs) in fuse_notify_inval_entry() argument
1474 int err = -ENOMEM; in fuse_notify_inval_entry()
1482 err = -EINVAL; in fuse_notify_inval_entry()
1486 err = fuse_copy_one(cs, &outarg, sizeof(outarg)); in fuse_notify_inval_entry()
1490 err = -ENAMETOOLONG; in fuse_notify_inval_entry()
1494 err = -EINVAL; in fuse_notify_inval_entry()
1500 err = fuse_copy_one(cs, buf, outarg.namelen + 1); in fuse_notify_inval_entry()
1503 fuse_copy_finish(cs); in fuse_notify_inval_entry()
1506 down_read(&fc->killsb); in fuse_notify_inval_entry()
1508 up_read(&fc->killsb); in fuse_notify_inval_entry()
1514 fuse_copy_finish(cs); in fuse_notify_inval_entry()
1519 struct fuse_copy_state *cs) in fuse_notify_delete() argument
1522 int err = -ENOMEM; in fuse_notify_delete()
1530 err = -EINVAL; in fuse_notify_delete()
1534 err = fuse_copy_one(cs, &outarg, sizeof(outarg)); in fuse_notify_delete()
1538 err = -ENAMETOOLONG; in fuse_notify_delete()
1542 err = -EINVAL; in fuse_notify_delete()
1548 err = fuse_copy_one(cs, buf, outarg.namelen + 1); in fuse_notify_delete()
1551 fuse_copy_finish(cs); in fuse_notify_delete()
1554 down_read(&fc->killsb); in fuse_notify_delete()
1556 up_read(&fc->killsb); in fuse_notify_delete()
1562 fuse_copy_finish(cs); in fuse_notify_delete()
1567 struct fuse_copy_state *cs) in fuse_notify_store() argument
1576 unsigned int num; in fuse_notify_store() local
1580 err = -EINVAL; in fuse_notify_store()
1584 err = fuse_copy_one(cs, &outarg, sizeof(outarg)); in fuse_notify_store()
1588 err = -EINVAL; in fuse_notify_store()
1589 if (size - sizeof(outarg) != outarg.size) in fuse_notify_store()
1594 down_read(&fc->killsb); in fuse_notify_store()
1596 err = -ENOENT; in fuse_notify_store()
1601 mapping = inode->i_mapping; in fuse_notify_store()
1611 num = outarg.size; in fuse_notify_store()
1612 while (num) { in fuse_notify_store()
1616 err = -ENOMEM; in fuse_notify_store()
1622 this_num = min_t(unsigned, num, PAGE_SIZE - offset); in fuse_notify_store()
1623 err = fuse_copy_page(cs, &page, offset, this_num, 0); in fuse_notify_store()
1633 num -= this_num; in fuse_notify_store()
1643 up_read(&fc->killsb); in fuse_notify_store()
1645 fuse_copy_finish(cs); in fuse_notify_store()
1660 release_pages(ra->ap.pages, ra->ap.num_pages); in fuse_retrieve_end()
1668 struct address_space *mapping = inode->i_mapping; in fuse_retrieve()
1671 unsigned int num; in fuse_retrieve() local
1675 struct fuse_conn *fc = fm->fc; in fuse_retrieve()
1681 offset = outarg->offset & ~PAGE_MASK; in fuse_retrieve()
1684 num = min(outarg->size, fc->max_write); in fuse_retrieve()
1685 if (outarg->offset > file_size) in fuse_retrieve()
1686 num = 0; in fuse_retrieve()
1687 else if (outarg->offset + num > file_size) in fuse_retrieve()
1688 num = file_size - outarg->offset; in fuse_retrieve()
1690 num_pages = (num + offset + PAGE_SIZE - 1) >> PAGE_SHIFT; in fuse_retrieve()
1691 num_pages = min(num_pages, fc->max_pages); in fuse_retrieve()
1693 args_size += num_pages * (sizeof(ap->pages[0]) + sizeof(ap->descs[0])); in fuse_retrieve()
1697 return -ENOMEM; in fuse_retrieve()
1699 ap = &ra->ap; in fuse_retrieve()
1700 ap->pages = (void *) (ra + 1); in fuse_retrieve()
1701 ap->descs = (void *) (ap->pages + num_pages); in fuse_retrieve()
1703 args = &ap->args; in fuse_retrieve()
1704 args->nodeid = outarg->nodeid; in fuse_retrieve()
1705 args->opcode = FUSE_NOTIFY_REPLY; in fuse_retrieve()
1706 args->in_numargs = 2; in fuse_retrieve()
1707 args->in_pages = true; in fuse_retrieve()
1708 args->end = fuse_retrieve_end; in fuse_retrieve()
1710 index = outarg->offset >> PAGE_SHIFT; in fuse_retrieve()
1712 while (num && ap->num_pages < num_pages) { in fuse_retrieve()
1720 this_num = min_t(unsigned, num, PAGE_SIZE - offset); in fuse_retrieve()
1721 ap->pages[ap->num_pages] = page; in fuse_retrieve()
1722 ap->descs[ap->num_pages].offset = offset; in fuse_retrieve()
1723 ap->descs[ap->num_pages].length = this_num; in fuse_retrieve()
1724 ap->num_pages++; in fuse_retrieve()
1727 num -= this_num; in fuse_retrieve()
1731 ra->inarg.offset = outarg->offset; in fuse_retrieve()
1732 ra->inarg.size = total_len; in fuse_retrieve()
1733 args->in_args[0].size = sizeof(ra->inarg); in fuse_retrieve()
1734 args->in_args[0].value = &ra->inarg; in fuse_retrieve()
1735 args->in_args[1].size = total_len; in fuse_retrieve()
1737 err = fuse_simple_notify_reply(fm, args, outarg->notify_unique); in fuse_retrieve()
1745 struct fuse_copy_state *cs) in fuse_notify_retrieve() argument
1753 err = -EINVAL; in fuse_notify_retrieve()
1757 err = fuse_copy_one(cs, &outarg, sizeof(outarg)); in fuse_notify_retrieve()
1761 fuse_copy_finish(cs); in fuse_notify_retrieve()
1763 down_read(&fc->killsb); in fuse_notify_retrieve()
1764 err = -ENOENT; in fuse_notify_retrieve()
1772 up_read(&fc->killsb); in fuse_notify_retrieve()
1777 fuse_copy_finish(cs); in fuse_notify_retrieve()
1782 unsigned int size, struct fuse_copy_state *cs) in fuse_notify() argument
1785 cs->move_pages = 0; in fuse_notify()
1789 return fuse_notify_poll(fc, size, cs); in fuse_notify()
1792 return fuse_notify_inval_inode(fc, size, cs); in fuse_notify()
1795 return fuse_notify_inval_entry(fc, size, cs); in fuse_notify()
1798 return fuse_notify_store(fc, size, cs); in fuse_notify()
1801 return fuse_notify_retrieve(fc, size, cs); in fuse_notify()
1804 return fuse_notify_delete(fc, size, cs); in fuse_notify()
1807 fuse_copy_finish(cs); in fuse_notify()
1808 return -EINVAL; in fuse_notify()
1818 list_for_each_entry(req, &fpq->processing[hash], list) { in request_find()
1819 if (req->in.h.unique == unique) in request_find()
1825 static int copy_out_args(struct fuse_copy_state *cs, struct fuse_args *args, in copy_out_args() argument
1830 reqsize += fuse_len_args(args->out_numargs, args->out_args); in copy_out_args()
1832 if (reqsize < nbytes || (reqsize > nbytes && !args->out_argvar)) in copy_out_args()
1833 return -EINVAL; in copy_out_args()
1835 struct fuse_arg *lastarg = &args->out_args[args->out_numargs-1]; in copy_out_args()
1836 unsigned diffsize = reqsize - nbytes; in copy_out_args()
1838 if (diffsize > lastarg->size) in copy_out_args()
1839 return -EINVAL; in copy_out_args()
1840 lastarg->size -= diffsize; in copy_out_args()
1842 return fuse_copy_args(cs, args->out_numargs, args->out_pages, in copy_out_args()
1843 args->out_args, args->page_zeroing); in copy_out_args()
1854 struct fuse_copy_state *cs, size_t nbytes) in fuse_dev_do_write() argument
1857 struct fuse_conn *fc = fud->fc; in fuse_dev_do_write()
1858 struct fuse_pqueue *fpq = &fud->pq; in fuse_dev_do_write()
1862 err = -EINVAL; in fuse_dev_do_write()
1866 err = fuse_copy_one(cs, &oh, sizeof(oh)); in fuse_dev_do_write()
1870 err = -EINVAL; in fuse_dev_do_write()
1879 err = fuse_notify(fc, oh.error, nbytes - sizeof(oh), cs); in fuse_dev_do_write()
1883 err = -EINVAL; in fuse_dev_do_write()
1884 if (oh.error <= -512 || oh.error > 0) in fuse_dev_do_write()
1887 spin_lock(&fpq->lock); in fuse_dev_do_write()
1889 if (fpq->connected) in fuse_dev_do_write()
1892 err = -ENOENT; in fuse_dev_do_write()
1894 spin_unlock(&fpq->lock); in fuse_dev_do_write()
1901 spin_unlock(&fpq->lock); in fuse_dev_do_write()
1905 err = -EINVAL; in fuse_dev_do_write()
1906 else if (oh.error == -ENOSYS) in fuse_dev_do_write()
1907 fc->no_interrupt = 1; in fuse_dev_do_write()
1908 else if (oh.error == -EAGAIN) in fuse_dev_do_write()
1916 clear_bit(FR_SENT, &req->flags); in fuse_dev_do_write()
1917 list_move(&req->list, &fpq->io); in fuse_dev_do_write()
1918 req->out.h = oh; in fuse_dev_do_write()
1919 set_bit(FR_LOCKED, &req->flags); in fuse_dev_do_write()
1920 spin_unlock(&fpq->lock); in fuse_dev_do_write()
1921 cs->req = req; in fuse_dev_do_write()
1922 if (!req->args->page_replace) in fuse_dev_do_write()
1923 cs->move_pages = 0; in fuse_dev_do_write()
1926 err = nbytes != sizeof(oh) ? -EINVAL : 0; in fuse_dev_do_write()
1928 err = copy_out_args(cs, req->args, nbytes); in fuse_dev_do_write()
1929 fuse_copy_finish(cs); in fuse_dev_do_write()
1931 spin_lock(&fpq->lock); in fuse_dev_do_write()
1932 clear_bit(FR_LOCKED, &req->flags); in fuse_dev_do_write()
1933 if (!fpq->connected) in fuse_dev_do_write()
1934 err = -ENOENT; in fuse_dev_do_write()
1936 req->out.h.error = -EIO; in fuse_dev_do_write()
1937 if (!test_bit(FR_PRIVATE, &req->flags)) in fuse_dev_do_write()
1938 list_del_init(&req->list); in fuse_dev_do_write()
1939 spin_unlock(&fpq->lock); in fuse_dev_do_write()
1946 fuse_copy_finish(cs); in fuse_dev_do_write()
1952 struct fuse_copy_state cs; in fuse_dev_write() local
1953 struct fuse_dev *fud = fuse_get_dev(iocb->ki_filp); in fuse_dev_write()
1956 return -EPERM; in fuse_dev_write()
1959 return -EINVAL; in fuse_dev_write()
1961 fuse_copy_init(&cs, 0, from); in fuse_dev_write()
1963 return fuse_dev_do_write(fud, &cs, iov_iter_count(from)); in fuse_dev_write()
1974 struct fuse_copy_state cs; in fuse_dev_splice_write() local
1981 return -EPERM; in fuse_dev_splice_write()
1985 head = pipe->head; in fuse_dev_splice_write()
1986 tail = pipe->tail; in fuse_dev_splice_write()
1987 mask = pipe->ring_size - 1; in fuse_dev_splice_write()
1988 count = head - tail; in fuse_dev_splice_write()
1993 return -ENOMEM; in fuse_dev_splice_write()
1999 rem += pipe->bufs[idx & mask].len; in fuse_dev_splice_write()
2001 ret = -EINVAL; in fuse_dev_splice_write()
2013 ibuf = &pipe->bufs[tail & mask]; in fuse_dev_splice_write()
2016 if (rem >= ibuf->len) { in fuse_dev_splice_write()
2018 ibuf->ops = NULL; in fuse_dev_splice_write()
2020 pipe->tail = tail; in fuse_dev_splice_write()
2026 obuf->flags &= ~PIPE_BUF_FLAG_GIFT; in fuse_dev_splice_write()
2027 obuf->len = rem; in fuse_dev_splice_write()
2028 ibuf->offset += obuf->len; in fuse_dev_splice_write()
2029 ibuf->len -= obuf->len; in fuse_dev_splice_write()
2032 rem -= obuf->len; in fuse_dev_splice_write()
2036 fuse_copy_init(&cs, 0, NULL); in fuse_dev_splice_write()
2037 cs.pipebufs = bufs; in fuse_dev_splice_write()
2038 cs.nr_segs = nbuf; in fuse_dev_splice_write()
2039 cs.pipe = pipe; in fuse_dev_splice_write()
2042 cs.move_pages = 1; in fuse_dev_splice_write()
2044 ret = fuse_dev_do_write(fud, &cs, len); in fuse_dev_splice_write()
2065 fiq = &fud->fc->iq; in fuse_dev_poll()
2066 poll_wait(file, &fiq->waitq, wait); in fuse_dev_poll()
2068 spin_lock(&fiq->lock); in fuse_dev_poll()
2069 if (!fiq->connected) in fuse_dev_poll()
2073 spin_unlock(&fiq->lock); in fuse_dev_poll()
2083 req = list_entry(head->next, struct fuse_req, list); in end_requests()
2084 req->out.h.error = -ECONNABORTED; in end_requests()
2085 clear_bit(FR_SENT, &req->flags); in end_requests()
2086 list_del_init(&req->list); in end_requests()
2095 p = rb_first(&fc->polled_files); in end_polls()
2100 wake_up_interruptible_all(&ff->poll_wait); in end_polls()
2126 struct fuse_iqueue *fiq = &fc->iq; in fuse_abort_conn()
2128 spin_lock(&fc->lock); in fuse_abort_conn()
2129 if (fc->connected) { in fuse_abort_conn()
2135 /* Background queuing checks fc->connected under bg_lock */ in fuse_abort_conn()
2136 spin_lock(&fc->bg_lock); in fuse_abort_conn()
2137 fc->connected = 0; in fuse_abort_conn()
2138 spin_unlock(&fc->bg_lock); in fuse_abort_conn()
2141 list_for_each_entry(fud, &fc->devices, entry) { in fuse_abort_conn()
2142 struct fuse_pqueue *fpq = &fud->pq; in fuse_abort_conn()
2144 spin_lock(&fpq->lock); in fuse_abort_conn()
2145 fpq->connected = 0; in fuse_abort_conn()
2146 list_for_each_entry_safe(req, next, &fpq->io, list) { in fuse_abort_conn()
2147 req->out.h.error = -ECONNABORTED; in fuse_abort_conn()
2148 spin_lock(&req->waitq.lock); in fuse_abort_conn()
2149 set_bit(FR_ABORTED, &req->flags); in fuse_abort_conn()
2150 if (!test_bit(FR_LOCKED, &req->flags)) { in fuse_abort_conn()
2151 set_bit(FR_PRIVATE, &req->flags); in fuse_abort_conn()
2153 list_move(&req->list, &to_end); in fuse_abort_conn()
2155 spin_unlock(&req->waitq.lock); in fuse_abort_conn()
2158 list_splice_tail_init(&fpq->processing[i], in fuse_abort_conn()
2160 spin_unlock(&fpq->lock); in fuse_abort_conn()
2162 spin_lock(&fc->bg_lock); in fuse_abort_conn()
2163 fc->blocked = 0; in fuse_abort_conn()
2164 fc->max_background = UINT_MAX; in fuse_abort_conn()
2166 spin_unlock(&fc->bg_lock); in fuse_abort_conn()
2168 spin_lock(&fiq->lock); in fuse_abort_conn()
2169 fiq->connected = 0; in fuse_abort_conn()
2170 list_for_each_entry(req, &fiq->pending, list) in fuse_abort_conn()
2171 clear_bit(FR_PENDING, &req->flags); in fuse_abort_conn()
2172 list_splice_tail_init(&fiq->pending, &to_end); in fuse_abort_conn()
2175 wake_up_all(&fiq->waitq); in fuse_abort_conn()
2176 spin_unlock(&fiq->lock); in fuse_abort_conn()
2177 kill_fasync(&fiq->fasync, SIGIO, POLL_IN); in fuse_abort_conn()
2179 wake_up_all(&fc->blocked_waitq); in fuse_abort_conn()
2180 spin_unlock(&fc->lock); in fuse_abort_conn()
2184 spin_unlock(&fc->lock); in fuse_abort_conn()
2193 wait_event(fc->blocked_waitq, atomic_read(&fc->num_waiting) == 0); in fuse_wait_aborted()
2201 struct fuse_conn *fc = fud->fc; in fuse_dev_release()
2202 struct fuse_pqueue *fpq = &fud->pq; in fuse_dev_release()
2206 spin_lock(&fpq->lock); in fuse_dev_release()
2207 WARN_ON(!list_empty(&fpq->io)); in fuse_dev_release()
2209 list_splice_init(&fpq->processing[i], &to_end); in fuse_dev_release()
2210 spin_unlock(&fpq->lock); in fuse_dev_release()
2215 if (atomic_dec_and_test(&fc->dev_count)) { in fuse_dev_release()
2216 WARN_ON(fc->iq.fasync != NULL); in fuse_dev_release()
2230 return -EPERM; in fuse_dev_fasync()
2232 /* No locking - fasync_helper does its own locking */ in fuse_dev_fasync()
2233 return fasync_helper(fd, file, on, &fud->fc->iq.fasync); in fuse_dev_fasync()
2240 if (new->private_data) in fuse_device_clone()
2241 return -EINVAL; in fuse_device_clone()
2245 return -ENOMEM; in fuse_device_clone()
2247 new->private_data = fud; in fuse_device_clone()
2248 atomic_inc(&fc->dev_count); in fuse_device_clone()
2256 int err = -ENOTTY; in fuse_dev_ioctl()
2261 err = -EFAULT; in fuse_dev_ioctl()
2265 err = -EINVAL; in fuse_dev_ioctl()
2270 * Check against file->f_op because CUSE in fuse_dev_ioctl()
2273 if (old->f_op == file->f_op && in fuse_dev_ioctl()
2274 old->f_cred->user_ns == file->f_cred->user_ns) in fuse_dev_ioctl()
2279 err = fuse_device_clone(fud->fc, file); in fuse_dev_ioctl()
2313 int err = -ENOMEM; in fuse_dev_init()