Lines Matching +full:cs +full:- +full:out
3 Copyright (C) 2001-2008 Miklos Szeredi <miklos@szeredi.hu>
38 * Lockless access is OK, because file->private data is set in fuse_get_dev()
41 return READ_ONCE(file->private_data); in fuse_get_dev()
46 INIT_LIST_HEAD(&req->list); in fuse_request_init()
47 INIT_LIST_HEAD(&req->intr_entry); in fuse_request_init()
48 init_waitqueue_head(&req->waitq); in fuse_request_init()
49 refcount_set(&req->count, 1); in fuse_request_init()
50 __set_bit(FR_PENDING, &req->flags); in fuse_request_init()
51 req->fm = fm; in fuse_request_init()
70 refcount_inc(&req->count); in __fuse_get_request()
76 refcount_dec(&req->count); in __fuse_put_request()
83 fc->initialized = 1; in fuse_set_initialized()
88 return !fc->initialized || (for_background && fc->blocked); in fuse_block_alloc()
94 * lockess check of fc->connected is okay, because atomic_dec_and_test() in fuse_drop_waiting()
96 * to ensure no wake-up is missed. in fuse_drop_waiting()
98 if (atomic_dec_and_test(&fc->num_waiting) && in fuse_drop_waiting()
99 !READ_ONCE(fc->connected)) { in fuse_drop_waiting()
101 wake_up_all(&fc->blocked_waitq); in fuse_drop_waiting()
109 struct fuse_conn *fc = fm->fc; in fuse_get_req()
112 atomic_inc(&fc->num_waiting); in fuse_get_req()
115 err = -EINTR; in fuse_get_req()
116 if (wait_event_killable_exclusive(fc->blocked_waitq, in fuse_get_req()
118 goto out; in fuse_get_req()
123 err = -ENOTCONN; in fuse_get_req()
124 if (!fc->connected) in fuse_get_req()
125 goto out; in fuse_get_req()
127 err = -ECONNREFUSED; in fuse_get_req()
128 if (fc->conn_error) in fuse_get_req()
129 goto out; in fuse_get_req()
132 err = -ENOMEM; in fuse_get_req()
135 wake_up(&fc->blocked_waitq); in fuse_get_req()
136 goto out; in fuse_get_req()
139 req->in.h.uid = from_kuid(fc->user_ns, current_fsuid()); in fuse_get_req()
140 req->in.h.gid = from_kgid(fc->user_ns, current_fsgid()); in fuse_get_req()
141 req->in.h.pid = pid_nr_ns(task_pid(current), fc->pid_ns); in fuse_get_req()
143 __set_bit(FR_WAITING, &req->flags); in fuse_get_req()
145 __set_bit(FR_BACKGROUND, &req->flags); in fuse_get_req()
147 if (unlikely(req->in.h.uid == ((uid_t)-1) || in fuse_get_req()
148 req->in.h.gid == ((gid_t)-1))) { in fuse_get_req()
150 return ERR_PTR(-EOVERFLOW); in fuse_get_req()
154 out: in fuse_get_req()
161 struct fuse_conn *fc = req->fm->fc; in fuse_put_request()
163 if (refcount_dec_and_test(&req->count)) { in fuse_put_request()
164 if (test_bit(FR_BACKGROUND, &req->flags)) { in fuse_put_request()
169 spin_lock(&fc->bg_lock); in fuse_put_request()
170 if (!fc->blocked) in fuse_put_request()
171 wake_up(&fc->blocked_waitq); in fuse_put_request()
172 spin_unlock(&fc->bg_lock); in fuse_put_request()
175 if (test_bit(FR_WAITING, &req->flags)) { in fuse_put_request()
176 __clear_bit(FR_WAITING, &req->flags); in fuse_put_request()
198 fiq->reqctr += FUSE_REQ_ID_STEP; in fuse_get_unique()
199 return fiq->reqctr; in fuse_get_unique()
209 * A new request is available, wake fiq->waitq
212 __releases(fiq->lock) in fuse_dev_wake_and_unlock()
215 wake_up_sync(&fiq->waitq); in fuse_dev_wake_and_unlock()
217 wake_up(&fiq->waitq); in fuse_dev_wake_and_unlock()
218 kill_fasync(&fiq->fasync, SIGIO, POLL_IN); in fuse_dev_wake_and_unlock()
219 spin_unlock(&fiq->lock); in fuse_dev_wake_and_unlock()
231 __releases(fiq->lock) in queue_request_and_unlock()
233 req->in.h.len = sizeof(struct fuse_in_header) + in queue_request_and_unlock()
234 fuse_len_args(req->args->in_numargs, in queue_request_and_unlock()
235 (struct fuse_arg *) req->args->in_args); in queue_request_and_unlock()
236 list_add_tail(&req->list, &fiq->pending); in queue_request_and_unlock()
237 fiq->ops->wake_pending_and_unlock(fiq, sync); in queue_request_and_unlock()
243 struct fuse_iqueue *fiq = &fc->iq; in fuse_queue_forget()
245 forget->forget_one.nodeid = nodeid; in fuse_queue_forget()
246 forget->forget_one.nlookup = nlookup; in fuse_queue_forget()
248 spin_lock(&fiq->lock); in fuse_queue_forget()
249 if (fiq->connected) { in fuse_queue_forget()
250 fiq->forget_list_tail->next = forget; in fuse_queue_forget()
251 fiq->forget_list_tail = forget; in fuse_queue_forget()
252 fiq->ops->wake_forget_and_unlock(fiq, false); in fuse_queue_forget()
255 spin_unlock(&fiq->lock); in fuse_queue_forget()
261 struct fuse_iqueue *fiq = &fc->iq; in flush_bg_queue()
263 while (fc->active_background < fc->max_background && in flush_bg_queue()
264 !list_empty(&fc->bg_queue)) { in flush_bg_queue()
267 req = list_first_entry(&fc->bg_queue, struct fuse_req, list); in flush_bg_queue()
268 list_del(&req->list); in flush_bg_queue()
269 fc->active_background++; in flush_bg_queue()
270 spin_lock(&fiq->lock); in flush_bg_queue()
271 req->in.h.unique = fuse_get_unique(fiq); in flush_bg_queue()
286 struct fuse_mount *fm = req->fm; in fuse_request_end()
287 struct fuse_conn *fc = fm->fc; in fuse_request_end()
288 struct fuse_iqueue *fiq = &fc->iq; in fuse_request_end()
290 if (test_and_set_bit(FR_FINISHED, &req->flags)) in fuse_request_end()
298 if (test_bit(FR_INTERRUPTED, &req->flags)) { in fuse_request_end()
299 spin_lock(&fiq->lock); in fuse_request_end()
300 list_del_init(&req->intr_entry); in fuse_request_end()
301 spin_unlock(&fiq->lock); in fuse_request_end()
303 WARN_ON(test_bit(FR_PENDING, &req->flags)); in fuse_request_end()
304 WARN_ON(test_bit(FR_SENT, &req->flags)); in fuse_request_end()
305 if (test_bit(FR_BACKGROUND, &req->flags)) { in fuse_request_end()
306 spin_lock(&fc->bg_lock); in fuse_request_end()
307 clear_bit(FR_BACKGROUND, &req->flags); in fuse_request_end()
308 if (fc->num_background == fc->max_background) { in fuse_request_end()
309 fc->blocked = 0; in fuse_request_end()
310 wake_up(&fc->blocked_waitq); in fuse_request_end()
311 } else if (!fc->blocked) { in fuse_request_end()
315 * fc->blocked with waiters with the wake_up() call in fuse_request_end()
318 if (waitqueue_active(&fc->blocked_waitq)) in fuse_request_end()
319 wake_up(&fc->blocked_waitq); in fuse_request_end()
322 if (fc->num_background == fc->congestion_threshold && fm->sb) { in fuse_request_end()
323 clear_bdi_congested(fm->sb->s_bdi, BLK_RW_SYNC); in fuse_request_end()
324 clear_bdi_congested(fm->sb->s_bdi, BLK_RW_ASYNC); in fuse_request_end()
326 fc->num_background--; in fuse_request_end()
327 fc->active_background--; in fuse_request_end()
329 spin_unlock(&fc->bg_lock); in fuse_request_end()
332 wake_up(&req->waitq); in fuse_request_end()
335 if (test_bit(FR_ASYNC, &req->flags)) in fuse_request_end()
336 req->args->end(fm, req->args, req->out.h.error); in fuse_request_end()
344 struct fuse_iqueue *fiq = &req->fm->fc->iq; in queue_interrupt()
346 spin_lock(&fiq->lock); in queue_interrupt()
348 if (unlikely(!test_bit(FR_INTERRUPTED, &req->flags))) { in queue_interrupt()
349 spin_unlock(&fiq->lock); in queue_interrupt()
350 return -EINVAL; in queue_interrupt()
353 if (list_empty(&req->intr_entry)) { in queue_interrupt()
354 list_add_tail(&req->intr_entry, &fiq->interrupts); in queue_interrupt()
360 if (test_bit(FR_FINISHED, &req->flags)) { in queue_interrupt()
361 list_del_init(&req->intr_entry); in queue_interrupt()
362 spin_unlock(&fiq->lock); in queue_interrupt()
365 fiq->ops->wake_interrupt_and_unlock(fiq, false); in queue_interrupt()
367 spin_unlock(&fiq->lock); in queue_interrupt()
374 struct fuse_conn *fc = req->fm->fc; in request_wait_answer()
375 struct fuse_iqueue *fiq = &fc->iq; in request_wait_answer()
378 if (!fc->no_interrupt) { in request_wait_answer()
380 err = wait_event_interruptible(req->waitq, in request_wait_answer()
381 test_bit(FR_FINISHED, &req->flags)); in request_wait_answer()
385 set_bit(FR_INTERRUPTED, &req->flags); in request_wait_answer()
388 if (test_bit(FR_SENT, &req->flags)) in request_wait_answer()
392 if (!test_bit(FR_FORCE, &req->flags)) { in request_wait_answer()
394 err = wait_event_killable(req->waitq, in request_wait_answer()
395 test_bit(FR_FINISHED, &req->flags)); in request_wait_answer()
399 spin_lock(&fiq->lock); in request_wait_answer()
400 /* Request is not yet in userspace, bail out */ in request_wait_answer()
401 if (test_bit(FR_PENDING, &req->flags)) { in request_wait_answer()
402 list_del(&req->list); in request_wait_answer()
403 spin_unlock(&fiq->lock); in request_wait_answer()
405 req->out.h.error = -EINTR; in request_wait_answer()
408 spin_unlock(&fiq->lock); in request_wait_answer()
413 * Wait it out. in request_wait_answer()
415 wait_event(req->waitq, test_bit(FR_FINISHED, &req->flags)); in request_wait_answer()
420 struct fuse_iqueue *fiq = &req->fm->fc->iq; in __fuse_request_send()
422 BUG_ON(test_bit(FR_BACKGROUND, &req->flags)); in __fuse_request_send()
423 spin_lock(&fiq->lock); in __fuse_request_send()
424 if (!fiq->connected) { in __fuse_request_send()
425 spin_unlock(&fiq->lock); in __fuse_request_send()
426 req->out.h.error = -ENOTCONN; in __fuse_request_send()
428 req->in.h.unique = fuse_get_unique(fiq); in __fuse_request_send()
442 if (fc->minor < 4 && args->opcode == FUSE_STATFS) in fuse_adjust_compat()
443 args->out_args[0].size = FUSE_COMPAT_STATFS_SIZE; in fuse_adjust_compat()
445 if (fc->minor < 9) { in fuse_adjust_compat()
446 switch (args->opcode) { in fuse_adjust_compat()
453 args->out_args[0].size = FUSE_COMPAT_ENTRY_OUT_SIZE; in fuse_adjust_compat()
457 args->out_args[0].size = FUSE_COMPAT_ATTR_OUT_SIZE; in fuse_adjust_compat()
461 if (fc->minor < 12) { in fuse_adjust_compat()
462 switch (args->opcode) { in fuse_adjust_compat()
464 args->in_args[0].size = sizeof(struct fuse_open_in); in fuse_adjust_compat()
467 args->in_args[0].size = FUSE_COMPAT_MKNOD_IN_SIZE; in fuse_adjust_compat()
475 struct fuse_conn *fc = req->fm->fc; in fuse_force_creds()
477 req->in.h.uid = from_kuid_munged(fc->user_ns, current_fsuid()); in fuse_force_creds()
478 req->in.h.gid = from_kgid_munged(fc->user_ns, current_fsgid()); in fuse_force_creds()
479 req->in.h.pid = pid_nr_ns(task_pid(current), fc->pid_ns); in fuse_force_creds()
484 req->in.h.opcode = args->opcode; in fuse_args_to_req()
485 req->in.h.nodeid = args->nodeid; in fuse_args_to_req()
486 req->args = args; in fuse_args_to_req()
487 if (args->end) in fuse_args_to_req()
488 __set_bit(FR_ASYNC, &req->flags); in fuse_args_to_req()
493 struct fuse_conn *fc = fm->fc; in fuse_simple_request()
497 if (args->force) { in fuse_simple_request()
498 atomic_inc(&fc->num_waiting); in fuse_simple_request()
501 if (!args->nocreds) in fuse_simple_request()
504 __set_bit(FR_WAITING, &req->flags); in fuse_simple_request()
505 __set_bit(FR_FORCE, &req->flags); in fuse_simple_request()
507 WARN_ON(args->nocreds); in fuse_simple_request()
513 /* Needs to be done after fuse_get_req() so that fc->minor is valid */ in fuse_simple_request()
517 if (!args->noreply) in fuse_simple_request()
518 __set_bit(FR_ISREPLY, &req->flags); in fuse_simple_request()
520 ret = req->out.h.error; in fuse_simple_request()
521 if (!ret && args->out_argvar) { in fuse_simple_request()
522 BUG_ON(args->out_numargs == 0); in fuse_simple_request()
523 ret = args->out_args[args->out_numargs - 1].size; in fuse_simple_request()
532 struct fuse_mount *fm = req->fm; in fuse_request_queue_background()
533 struct fuse_conn *fc = fm->fc; in fuse_request_queue_background()
536 WARN_ON(!test_bit(FR_BACKGROUND, &req->flags)); in fuse_request_queue_background()
537 if (!test_bit(FR_WAITING, &req->flags)) { in fuse_request_queue_background()
538 __set_bit(FR_WAITING, &req->flags); in fuse_request_queue_background()
539 atomic_inc(&fc->num_waiting); in fuse_request_queue_background()
541 __set_bit(FR_ISREPLY, &req->flags); in fuse_request_queue_background()
542 spin_lock(&fc->bg_lock); in fuse_request_queue_background()
543 if (likely(fc->connected)) { in fuse_request_queue_background()
544 fc->num_background++; in fuse_request_queue_background()
545 if (fc->num_background == fc->max_background) in fuse_request_queue_background()
546 fc->blocked = 1; in fuse_request_queue_background()
547 if (fc->num_background == fc->congestion_threshold && fm->sb) { in fuse_request_queue_background()
548 set_bdi_congested(fm->sb->s_bdi, BLK_RW_SYNC); in fuse_request_queue_background()
549 set_bdi_congested(fm->sb->s_bdi, BLK_RW_ASYNC); in fuse_request_queue_background()
551 list_add_tail(&req->list, &fc->bg_queue); in fuse_request_queue_background()
555 spin_unlock(&fc->bg_lock); in fuse_request_queue_background()
565 if (args->force) { in fuse_simple_background()
566 WARN_ON(!args->nocreds); in fuse_simple_background()
569 return -ENOMEM; in fuse_simple_background()
570 __set_bit(FR_BACKGROUND, &req->flags); in fuse_simple_background()
572 WARN_ON(args->nocreds); in fuse_simple_background()
582 return -ENOTCONN; in fuse_simple_background()
593 struct fuse_iqueue *fiq = &fm->fc->iq; in fuse_simple_notify_reply()
600 __clear_bit(FR_ISREPLY, &req->flags); in fuse_simple_notify_reply()
601 req->in.h.unique = unique; in fuse_simple_notify_reply()
605 spin_lock(&fiq->lock); in fuse_simple_notify_reply()
606 if (fiq->connected) { in fuse_simple_notify_reply()
609 err = -ENODEV; in fuse_simple_notify_reply()
610 spin_unlock(&fiq->lock); in fuse_simple_notify_reply()
619 * anything that could cause a page-fault. If the request was already
620 * aborted bail out.
626 spin_lock(&req->waitq.lock); in lock_request()
627 if (test_bit(FR_ABORTED, &req->flags)) in lock_request()
628 err = -ENOENT; in lock_request()
630 set_bit(FR_LOCKED, &req->flags); in lock_request()
631 spin_unlock(&req->waitq.lock); in lock_request()
644 spin_lock(&req->waitq.lock); in unlock_request()
645 if (test_bit(FR_ABORTED, &req->flags)) in unlock_request()
646 err = -ENOENT; in unlock_request()
648 clear_bit(FR_LOCKED, &req->flags); in unlock_request()
649 spin_unlock(&req->waitq.lock); in unlock_request()
668 static void fuse_copy_init(struct fuse_copy_state *cs, int write, in fuse_copy_init() argument
671 memset(cs, 0, sizeof(*cs)); in fuse_copy_init()
672 cs->write = write; in fuse_copy_init()
673 cs->iter = iter; in fuse_copy_init()
677 static void fuse_copy_finish(struct fuse_copy_state *cs) in fuse_copy_finish() argument
679 if (cs->currbuf) { in fuse_copy_finish()
680 struct pipe_buffer *buf = cs->currbuf; in fuse_copy_finish()
682 if (cs->write) in fuse_copy_finish()
683 buf->len = PAGE_SIZE - cs->len; in fuse_copy_finish()
684 cs->currbuf = NULL; in fuse_copy_finish()
685 } else if (cs->pg) { in fuse_copy_finish()
686 if (cs->write) { in fuse_copy_finish()
687 flush_dcache_page(cs->pg); in fuse_copy_finish()
688 set_page_dirty_lock(cs->pg); in fuse_copy_finish()
694 put_user_page(cs->pg); in fuse_copy_finish()
696 cs->pg = NULL; in fuse_copy_finish()
703 static int fuse_copy_fill(struct fuse_copy_state *cs) in fuse_copy_fill() argument
708 err = unlock_request(cs->req); in fuse_copy_fill()
712 fuse_copy_finish(cs); in fuse_copy_fill()
713 if (cs->pipebufs) { in fuse_copy_fill()
714 struct pipe_buffer *buf = cs->pipebufs; in fuse_copy_fill()
716 if (!cs->write) { in fuse_copy_fill()
717 err = pipe_buf_confirm(cs->pipe, buf); in fuse_copy_fill()
721 BUG_ON(!cs->nr_segs); in fuse_copy_fill()
722 cs->currbuf = buf; in fuse_copy_fill()
723 cs->pg = buf->page; in fuse_copy_fill()
724 cs->offset = buf->offset; in fuse_copy_fill()
725 cs->len = buf->len; in fuse_copy_fill()
726 cs->pipebufs++; in fuse_copy_fill()
727 cs->nr_segs--; in fuse_copy_fill()
729 if (cs->nr_segs >= cs->pipe->max_usage) in fuse_copy_fill()
730 return -EIO; in fuse_copy_fill()
734 return -ENOMEM; in fuse_copy_fill()
736 buf->page = page; in fuse_copy_fill()
737 buf->offset = 0; in fuse_copy_fill()
738 buf->len = 0; in fuse_copy_fill()
740 cs->currbuf = buf; in fuse_copy_fill()
741 cs->pg = page; in fuse_copy_fill()
742 cs->offset = 0; in fuse_copy_fill()
743 cs->len = PAGE_SIZE; in fuse_copy_fill()
744 cs->pipebufs++; in fuse_copy_fill()
745 cs->nr_segs++; in fuse_copy_fill()
749 err = iov_iter_get_pages(cs->iter, &page, PAGE_SIZE, 1, &off); in fuse_copy_fill()
753 cs->len = err; in fuse_copy_fill()
754 cs->offset = off; in fuse_copy_fill()
755 cs->pg = page; in fuse_copy_fill()
756 iov_iter_advance(cs->iter, err); in fuse_copy_fill()
759 return lock_request(cs->req); in fuse_copy_fill()
763 static int fuse_copy_do(struct fuse_copy_state *cs, void **val, unsigned *size) in fuse_copy_do() argument
765 unsigned ncpy = min(*size, cs->len); in fuse_copy_do()
767 void *pgaddr = kmap_atomic(cs->pg); in fuse_copy_do()
768 void *buf = pgaddr + cs->offset; in fuse_copy_do()
770 if (cs->write) in fuse_copy_do()
778 *size -= ncpy; in fuse_copy_do()
779 cs->len -= ncpy; in fuse_copy_do()
780 cs->offset += ncpy; in fuse_copy_do()
787 page->mapping != NULL || in fuse_check_page()
788 (page->flags & PAGE_FLAGS_CHECK_AT_PREP & in fuse_check_page()
803 static int fuse_try_move_page(struct fuse_copy_state *cs, struct page **pagep) in fuse_try_move_page() argument
808 struct pipe_buffer *buf = cs->pipebufs; in fuse_try_move_page()
811 err = unlock_request(cs->req); in fuse_try_move_page()
815 fuse_copy_finish(cs); in fuse_try_move_page()
817 err = pipe_buf_confirm(cs->pipe, buf); in fuse_try_move_page()
821 BUG_ON(!cs->nr_segs); in fuse_try_move_page()
822 cs->currbuf = buf; in fuse_try_move_page()
823 cs->len = buf->len; in fuse_try_move_page()
824 cs->pipebufs++; in fuse_try_move_page()
825 cs->nr_segs--; in fuse_try_move_page()
827 if (cs->len != PAGE_SIZE) in fuse_try_move_page()
830 if (!pipe_buf_try_steal(cs->pipe, buf)) in fuse_try_move_page()
833 newpage = buf->page; in fuse_try_move_page()
864 if (!(buf->flags & PIPE_BUF_FLAG_LRU)) in fuse_try_move_page()
871 pipe_buf_release(cs->pipe, buf); in fuse_try_move_page()
874 spin_lock(&cs->req->waitq.lock); in fuse_try_move_page()
875 if (test_bit(FR_ABORTED, &cs->req->flags)) in fuse_try_move_page()
876 err = -ENOENT; in fuse_try_move_page()
879 spin_unlock(&cs->req->waitq.lock); in fuse_try_move_page()
888 /* Drop ref for ap->pages[] array */ in fuse_try_move_page()
890 cs->len = 0; in fuse_try_move_page()
901 cs->pg = buf->page; in fuse_try_move_page()
902 cs->offset = buf->offset; in fuse_try_move_page()
904 err = lock_request(cs->req); in fuse_try_move_page()
911 static int fuse_ref_page(struct fuse_copy_state *cs, struct page *page, in fuse_ref_page() argument
917 if (cs->nr_segs >= cs->pipe->max_usage) in fuse_ref_page()
918 return -EIO; in fuse_ref_page()
921 err = unlock_request(cs->req); in fuse_ref_page()
927 fuse_copy_finish(cs); in fuse_ref_page()
929 buf = cs->pipebufs; in fuse_ref_page()
930 buf->page = page; in fuse_ref_page()
931 buf->offset = offset; in fuse_ref_page()
932 buf->len = count; in fuse_ref_page()
934 cs->pipebufs++; in fuse_ref_page()
935 cs->nr_segs++; in fuse_ref_page()
936 cs->len = 0; in fuse_ref_page()
945 static int fuse_copy_page(struct fuse_copy_state *cs, struct page **pagep, in fuse_copy_page() argument
955 if (cs->write && cs->pipebufs && page) { in fuse_copy_page()
960 if (cs->req->args->user_pages) { in fuse_copy_page()
961 err = fuse_copy_fill(cs); in fuse_copy_page()
965 return fuse_ref_page(cs, page, offset, count); in fuse_copy_page()
967 } else if (!cs->len) { in fuse_copy_page()
968 if (cs->move_pages && page && in fuse_copy_page()
970 err = fuse_try_move_page(cs, pagep); in fuse_copy_page()
974 err = fuse_copy_fill(cs); in fuse_copy_page()
982 offset += fuse_copy_do(cs, &buf, &count); in fuse_copy_page()
985 offset += fuse_copy_do(cs, NULL, &count); in fuse_copy_page()
987 if (page && !cs->write) in fuse_copy_page()
993 static int fuse_copy_pages(struct fuse_copy_state *cs, unsigned nbytes, in fuse_copy_pages() argument
997 struct fuse_req *req = cs->req; in fuse_copy_pages()
998 struct fuse_args_pages *ap = container_of(req->args, typeof(*ap), args); in fuse_copy_pages()
1001 for (i = 0; i < ap->num_pages && (nbytes || zeroing); i++) { in fuse_copy_pages()
1003 unsigned int offset = ap->descs[i].offset; in fuse_copy_pages()
1004 unsigned int count = min(nbytes, ap->descs[i].length); in fuse_copy_pages()
1006 err = fuse_copy_page(cs, &ap->pages[i], offset, count, zeroing); in fuse_copy_pages()
1010 nbytes -= count; in fuse_copy_pages()
1016 static int fuse_copy_one(struct fuse_copy_state *cs, void *val, unsigned size) in fuse_copy_one() argument
1019 if (!cs->len) { in fuse_copy_one()
1020 int err = fuse_copy_fill(cs); in fuse_copy_one()
1024 fuse_copy_do(cs, &val, &size); in fuse_copy_one()
1030 static int fuse_copy_args(struct fuse_copy_state *cs, unsigned numargs, in fuse_copy_args() argument
1039 if (i == numargs - 1 && argpages) in fuse_copy_args()
1040 err = fuse_copy_pages(cs, arg->size, zeroing); in fuse_copy_args()
1042 err = fuse_copy_one(cs, arg->value, arg->size); in fuse_copy_args()
1049 return fiq->forget_list_head.next != NULL; in forget_pending()
1054 return !list_empty(&fiq->pending) || !list_empty(&fiq->interrupts) || in request_pending()
1064 * Called with fiq->lock held, releases it
1067 struct fuse_copy_state *cs, in fuse_read_interrupt() argument
1069 __releases(fiq->lock) in fuse_read_interrupt()
1076 list_del_init(&req->intr_entry); in fuse_read_interrupt()
1081 ih.unique = (req->in.h.unique | FUSE_INT_REQ_BIT); in fuse_read_interrupt()
1082 arg.unique = req->in.h.unique; in fuse_read_interrupt()
1084 spin_unlock(&fiq->lock); in fuse_read_interrupt()
1086 return -EINVAL; in fuse_read_interrupt()
1088 err = fuse_copy_one(cs, &ih, sizeof(ih)); in fuse_read_interrupt()
1090 err = fuse_copy_one(cs, &arg, sizeof(arg)); in fuse_read_interrupt()
1091 fuse_copy_finish(cs); in fuse_read_interrupt()
1100 struct fuse_forget_link *head = fiq->forget_list_head.next; in fuse_dequeue_forget()
1105 newhead = &(*newhead)->next; in fuse_dequeue_forget()
1107 fiq->forget_list_head.next = *newhead; in fuse_dequeue_forget()
1109 if (fiq->forget_list_head.next == NULL) in fuse_dequeue_forget()
1110 fiq->forget_list_tail = &fiq->forget_list_head; in fuse_dequeue_forget()
1120 struct fuse_copy_state *cs, in fuse_read_single_forget() argument
1122 __releases(fiq->lock) in fuse_read_single_forget()
1127 .nlookup = forget->forget_one.nlookup, in fuse_read_single_forget()
1131 .nodeid = forget->forget_one.nodeid, in fuse_read_single_forget()
1136 spin_unlock(&fiq->lock); in fuse_read_single_forget()
1139 return -EINVAL; in fuse_read_single_forget()
1141 err = fuse_copy_one(cs, &ih, sizeof(ih)); in fuse_read_single_forget()
1143 err = fuse_copy_one(cs, &arg, sizeof(arg)); in fuse_read_single_forget()
1144 fuse_copy_finish(cs); in fuse_read_single_forget()
1153 struct fuse_copy_state *cs, size_t nbytes) in fuse_read_batch_forget() argument
1154 __releases(fiq->lock) in fuse_read_batch_forget()
1168 spin_unlock(&fiq->lock); in fuse_read_batch_forget()
1169 return -EINVAL; in fuse_read_batch_forget()
1172 max_forgets = (nbytes - ih.len) / sizeof(struct fuse_forget_one); in fuse_read_batch_forget()
1174 spin_unlock(&fiq->lock); in fuse_read_batch_forget()
1178 err = fuse_copy_one(cs, &ih, sizeof(ih)); in fuse_read_batch_forget()
1180 err = fuse_copy_one(cs, &arg, sizeof(arg)); in fuse_read_batch_forget()
1186 err = fuse_copy_one(cs, &forget->forget_one, in fuse_read_batch_forget()
1187 sizeof(forget->forget_one)); in fuse_read_batch_forget()
1189 head = forget->next; in fuse_read_batch_forget()
1193 fuse_copy_finish(cs); in fuse_read_batch_forget()
1202 struct fuse_copy_state *cs, in fuse_read_forget() argument
1204 __releases(fiq->lock) in fuse_read_forget()
1206 if (fc->minor < 16 || fiq->forget_list_head.next->next == NULL) in fuse_read_forget()
1207 return fuse_read_single_forget(fiq, cs, nbytes); in fuse_read_forget()
1209 return fuse_read_batch_forget(fiq, cs, nbytes); in fuse_read_forget()
1222 struct fuse_copy_state *cs, size_t nbytes) in fuse_dev_do_read() argument
1225 struct fuse_conn *fc = fud->fc; in fuse_dev_do_read()
1226 struct fuse_iqueue *fiq = &fc->iq; in fuse_dev_do_read()
1227 struct fuse_pqueue *fpq = &fud->pq; in fuse_dev_do_read()
1234 * Require sane minimum read buffer - that has capacity for fixed part in fuse_dev_do_read()
1248 fc->max_write)) in fuse_dev_do_read()
1249 return -EINVAL; in fuse_dev_do_read()
1253 spin_lock(&fiq->lock); in fuse_dev_do_read()
1254 if (!fiq->connected || request_pending(fiq)) in fuse_dev_do_read()
1256 spin_unlock(&fiq->lock); in fuse_dev_do_read()
1258 if (file->f_flags & O_NONBLOCK) in fuse_dev_do_read()
1259 return -EAGAIN; in fuse_dev_do_read()
1260 err = wait_event_interruptible_exclusive(fiq->waitq, in fuse_dev_do_read()
1261 !fiq->connected || request_pending(fiq)); in fuse_dev_do_read()
1266 if (!fiq->connected) { in fuse_dev_do_read()
1267 err = fc->aborted ? -ECONNABORTED : -ENODEV; in fuse_dev_do_read()
1271 if (!list_empty(&fiq->interrupts)) { in fuse_dev_do_read()
1272 req = list_entry(fiq->interrupts.next, struct fuse_req, in fuse_dev_do_read()
1274 return fuse_read_interrupt(fiq, cs, nbytes, req); in fuse_dev_do_read()
1278 if (list_empty(&fiq->pending) || fiq->forget_batch-- > 0) in fuse_dev_do_read()
1279 return fuse_read_forget(fc, fiq, cs, nbytes); in fuse_dev_do_read()
1281 if (fiq->forget_batch <= -8) in fuse_dev_do_read()
1282 fiq->forget_batch = 16; in fuse_dev_do_read()
1285 req = list_entry(fiq->pending.next, struct fuse_req, list); in fuse_dev_do_read()
1286 clear_bit(FR_PENDING, &req->flags); in fuse_dev_do_read()
1287 list_del_init(&req->list); in fuse_dev_do_read()
1288 spin_unlock(&fiq->lock); in fuse_dev_do_read()
1290 args = req->args; in fuse_dev_do_read()
1291 reqsize = req->in.h.len; in fuse_dev_do_read()
1295 req->out.h.error = -EIO; in fuse_dev_do_read()
1297 if (args->opcode == FUSE_SETXATTR) in fuse_dev_do_read()
1298 req->out.h.error = -E2BIG; in fuse_dev_do_read()
1302 spin_lock(&fpq->lock); in fuse_dev_do_read()
1304 * Must not put request on fpq->io queue after having been shut down by in fuse_dev_do_read()
1307 if (!fpq->connected) { in fuse_dev_do_read()
1308 req->out.h.error = err = -ECONNABORTED; in fuse_dev_do_read()
1312 list_add(&req->list, &fpq->io); in fuse_dev_do_read()
1313 spin_unlock(&fpq->lock); in fuse_dev_do_read()
1314 cs->req = req; in fuse_dev_do_read()
1315 err = fuse_copy_one(cs, &req->in.h, sizeof(req->in.h)); in fuse_dev_do_read()
1317 err = fuse_copy_args(cs, args->in_numargs, args->in_pages, in fuse_dev_do_read()
1318 (struct fuse_arg *) args->in_args, 0); in fuse_dev_do_read()
1319 fuse_copy_finish(cs); in fuse_dev_do_read()
1320 spin_lock(&fpq->lock); in fuse_dev_do_read()
1321 clear_bit(FR_LOCKED, &req->flags); in fuse_dev_do_read()
1322 if (!fpq->connected) { in fuse_dev_do_read()
1323 err = fc->aborted ? -ECONNABORTED : -ENODEV; in fuse_dev_do_read()
1327 req->out.h.error = -EIO; in fuse_dev_do_read()
1330 if (!test_bit(FR_ISREPLY, &req->flags)) { in fuse_dev_do_read()
1334 hash = fuse_req_hash(req->in.h.unique); in fuse_dev_do_read()
1335 list_move_tail(&req->list, &fpq->processing[hash]); in fuse_dev_do_read()
1337 set_bit(FR_SENT, &req->flags); in fuse_dev_do_read()
1338 spin_unlock(&fpq->lock); in fuse_dev_do_read()
1341 if (test_bit(FR_INTERRUPTED, &req->flags)) in fuse_dev_do_read()
1348 if (!test_bit(FR_PRIVATE, &req->flags)) in fuse_dev_do_read()
1349 list_del_init(&req->list); in fuse_dev_do_read()
1350 spin_unlock(&fpq->lock); in fuse_dev_do_read()
1355 spin_unlock(&fiq->lock); in fuse_dev_do_read()
1366 file->private_data = NULL; in fuse_dev_open()
1372 struct fuse_copy_state cs; in fuse_dev_read() local
1373 struct file *file = iocb->ki_filp; in fuse_dev_read()
1377 return -EPERM; in fuse_dev_read()
1380 return -EINVAL; in fuse_dev_read()
1382 fuse_copy_init(&cs, 1, to); in fuse_dev_read()
1384 return fuse_dev_do_read(fud, file, &cs, iov_iter_count(to)); in fuse_dev_read()
1394 struct fuse_copy_state cs; in fuse_dev_splice_read() local
1398 return -EPERM; in fuse_dev_splice_read()
1400 bufs = kvmalloc_array(pipe->max_usage, sizeof(struct pipe_buffer), in fuse_dev_splice_read()
1403 return -ENOMEM; in fuse_dev_splice_read()
1405 fuse_copy_init(&cs, 1, NULL); in fuse_dev_splice_read()
1406 cs.pipebufs = bufs; in fuse_dev_splice_read()
1407 cs.pipe = pipe; in fuse_dev_splice_read()
1408 ret = fuse_dev_do_read(fud, in, &cs, len); in fuse_dev_splice_read()
1410 goto out; in fuse_dev_splice_read()
1412 if (pipe_occupancy(pipe->head, pipe->tail) + cs.nr_segs > pipe->max_usage) { in fuse_dev_splice_read()
1413 ret = -EIO; in fuse_dev_splice_read()
1414 goto out; in fuse_dev_splice_read()
1417 for (ret = total = 0; page_nr < cs.nr_segs; total += ret) { in fuse_dev_splice_read()
1419 * Need to be careful about this. Having buf->ops in module in fuse_dev_splice_read()
1430 out: in fuse_dev_splice_read()
1431 for (; page_nr < cs.nr_segs; page_nr++) in fuse_dev_splice_read()
1439 struct fuse_copy_state *cs) in fuse_notify_poll() argument
1442 int err = -EINVAL; in fuse_notify_poll()
1447 err = fuse_copy_one(cs, &outarg, sizeof(outarg)); in fuse_notify_poll()
1451 fuse_copy_finish(cs); in fuse_notify_poll()
1455 fuse_copy_finish(cs); in fuse_notify_poll()
1460 struct fuse_copy_state *cs) in fuse_notify_inval_inode() argument
1463 int err = -EINVAL; in fuse_notify_inval_inode()
1468 err = fuse_copy_one(cs, &outarg, sizeof(outarg)); in fuse_notify_inval_inode()
1471 fuse_copy_finish(cs); in fuse_notify_inval_inode()
1473 down_read(&fc->killsb); in fuse_notify_inval_inode()
1476 up_read(&fc->killsb); in fuse_notify_inval_inode()
1480 fuse_copy_finish(cs); in fuse_notify_inval_inode()
1485 struct fuse_copy_state *cs) in fuse_notify_inval_entry() argument
1488 int err = -ENOMEM; in fuse_notify_inval_entry()
1496 err = -EINVAL; in fuse_notify_inval_entry()
1500 err = fuse_copy_one(cs, &outarg, sizeof(outarg)); in fuse_notify_inval_entry()
1504 err = -ENAMETOOLONG; in fuse_notify_inval_entry()
1508 err = -EINVAL; in fuse_notify_inval_entry()
1514 err = fuse_copy_one(cs, buf, outarg.namelen + 1); in fuse_notify_inval_entry()
1517 fuse_copy_finish(cs); in fuse_notify_inval_entry()
1520 down_read(&fc->killsb); in fuse_notify_inval_entry()
1522 up_read(&fc->killsb); in fuse_notify_inval_entry()
1528 fuse_copy_finish(cs); in fuse_notify_inval_entry()
1533 struct fuse_copy_state *cs) in fuse_notify_delete() argument
1536 int err = -ENOMEM; in fuse_notify_delete()
1544 err = -EINVAL; in fuse_notify_delete()
1548 err = fuse_copy_one(cs, &outarg, sizeof(outarg)); in fuse_notify_delete()
1552 err = -ENAMETOOLONG; in fuse_notify_delete()
1556 err = -EINVAL; in fuse_notify_delete()
1562 err = fuse_copy_one(cs, buf, outarg.namelen + 1); in fuse_notify_delete()
1565 fuse_copy_finish(cs); in fuse_notify_delete()
1568 down_read(&fc->killsb); in fuse_notify_delete()
1570 up_read(&fc->killsb); in fuse_notify_delete()
1576 fuse_copy_finish(cs); in fuse_notify_delete()
1581 struct fuse_copy_state *cs) in fuse_notify_store() argument
1594 err = -EINVAL; in fuse_notify_store()
1598 err = fuse_copy_one(cs, &outarg, sizeof(outarg)); in fuse_notify_store()
1602 err = -EINVAL; in fuse_notify_store()
1603 if (size - sizeof(outarg) != outarg.size) in fuse_notify_store()
1608 down_read(&fc->killsb); in fuse_notify_store()
1610 err = -ENOENT; in fuse_notify_store()
1615 mapping = inode->i_mapping; in fuse_notify_store()
1630 err = -ENOMEM; in fuse_notify_store()
1636 this_num = min_t(unsigned, num, PAGE_SIZE - offset); in fuse_notify_store()
1637 err = fuse_copy_page(cs, &page, offset, this_num, 0); in fuse_notify_store()
1647 num -= this_num; in fuse_notify_store()
1657 up_read(&fc->killsb); in fuse_notify_store()
1659 fuse_copy_finish(cs); in fuse_notify_store()
1674 release_pages(ra->ap.pages, ra->ap.num_pages); in fuse_retrieve_end()
1682 struct address_space *mapping = inode->i_mapping; in fuse_retrieve()
1689 struct fuse_conn *fc = fm->fc; in fuse_retrieve()
1695 offset = outarg->offset & ~PAGE_MASK; in fuse_retrieve()
1698 num = min(outarg->size, fc->max_write); in fuse_retrieve()
1699 if (outarg->offset > file_size) in fuse_retrieve()
1701 else if (outarg->offset + num > file_size) in fuse_retrieve()
1702 num = file_size - outarg->offset; in fuse_retrieve()
1704 num_pages = (num + offset + PAGE_SIZE - 1) >> PAGE_SHIFT; in fuse_retrieve()
1705 num_pages = min(num_pages, fc->max_pages); in fuse_retrieve()
1707 args_size += num_pages * (sizeof(ap->pages[0]) + sizeof(ap->descs[0])); in fuse_retrieve()
1711 return -ENOMEM; in fuse_retrieve()
1713 ap = &ra->ap; in fuse_retrieve()
1714 ap->pages = (void *) (ra + 1); in fuse_retrieve()
1715 ap->descs = (void *) (ap->pages + num_pages); in fuse_retrieve()
1717 args = &ap->args; in fuse_retrieve()
1718 args->nodeid = outarg->nodeid; in fuse_retrieve()
1719 args->opcode = FUSE_NOTIFY_REPLY; in fuse_retrieve()
1720 args->in_numargs = 2; in fuse_retrieve()
1721 args->in_pages = true; in fuse_retrieve()
1722 args->end = fuse_retrieve_end; in fuse_retrieve()
1724 index = outarg->offset >> PAGE_SHIFT; in fuse_retrieve()
1726 while (num && ap->num_pages < num_pages) { in fuse_retrieve()
1734 this_num = min_t(unsigned, num, PAGE_SIZE - offset); in fuse_retrieve()
1735 ap->pages[ap->num_pages] = page; in fuse_retrieve()
1736 ap->descs[ap->num_pages].offset = offset; in fuse_retrieve()
1737 ap->descs[ap->num_pages].length = this_num; in fuse_retrieve()
1738 ap->num_pages++; in fuse_retrieve()
1741 num -= this_num; in fuse_retrieve()
1745 ra->inarg.offset = outarg->offset; in fuse_retrieve()
1746 ra->inarg.size = total_len; in fuse_retrieve()
1747 args->in_args[0].size = sizeof(ra->inarg); in fuse_retrieve()
1748 args->in_args[0].value = &ra->inarg; in fuse_retrieve()
1749 args->in_args[1].size = total_len; in fuse_retrieve()
1751 err = fuse_simple_notify_reply(fm, args, outarg->notify_unique); in fuse_retrieve()
1759 struct fuse_copy_state *cs) in fuse_notify_retrieve() argument
1767 err = -EINVAL; in fuse_notify_retrieve()
1771 err = fuse_copy_one(cs, &outarg, sizeof(outarg)); in fuse_notify_retrieve()
1775 fuse_copy_finish(cs); in fuse_notify_retrieve()
1777 down_read(&fc->killsb); in fuse_notify_retrieve()
1778 err = -ENOENT; in fuse_notify_retrieve()
1786 up_read(&fc->killsb); in fuse_notify_retrieve()
1791 fuse_copy_finish(cs); in fuse_notify_retrieve()
1796 unsigned int size, struct fuse_copy_state *cs) in fuse_notify() argument
1799 cs->move_pages = 0; in fuse_notify()
1803 return fuse_notify_poll(fc, size, cs); in fuse_notify()
1806 return fuse_notify_inval_inode(fc, size, cs); in fuse_notify()
1809 return fuse_notify_inval_entry(fc, size, cs); in fuse_notify()
1812 return fuse_notify_store(fc, size, cs); in fuse_notify()
1815 return fuse_notify_retrieve(fc, size, cs); in fuse_notify()
1818 return fuse_notify_delete(fc, size, cs); in fuse_notify()
1821 fuse_copy_finish(cs); in fuse_notify()
1822 return -EINVAL; in fuse_notify()
1832 list_for_each_entry(req, &fpq->processing[hash], list) { in request_find()
1833 if (req->in.h.unique == unique) in request_find()
1839 static int copy_out_args(struct fuse_copy_state *cs, struct fuse_args *args, in copy_out_args() argument
1844 reqsize += fuse_len_args(args->out_numargs, args->out_args); in copy_out_args()
1846 if (reqsize < nbytes || (reqsize > nbytes && !args->out_argvar)) in copy_out_args()
1847 return -EINVAL; in copy_out_args()
1849 struct fuse_arg *lastarg = &args->out_args[args->out_numargs-1]; in copy_out_args()
1850 unsigned diffsize = reqsize - nbytes; in copy_out_args()
1852 if (diffsize > lastarg->size) in copy_out_args()
1853 return -EINVAL; in copy_out_args()
1854 lastarg->size -= diffsize; in copy_out_args()
1856 return fuse_copy_args(cs, args->out_numargs, args->out_pages, in copy_out_args()
1857 args->out_args, args->page_zeroing); in copy_out_args()
1868 struct fuse_copy_state *cs, size_t nbytes) in fuse_dev_do_write() argument
1871 struct fuse_conn *fc = fud->fc; in fuse_dev_do_write()
1872 struct fuse_pqueue *fpq = &fud->pq; in fuse_dev_do_write()
1876 err = -EINVAL; in fuse_dev_do_write()
1878 goto out; in fuse_dev_do_write()
1880 err = fuse_copy_one(cs, &oh, sizeof(oh)); in fuse_dev_do_write()
1884 err = -EINVAL; in fuse_dev_do_write()
1893 err = fuse_notify(fc, oh.error, nbytes - sizeof(oh), cs); in fuse_dev_do_write()
1894 goto out; in fuse_dev_do_write()
1897 err = -EINVAL; in fuse_dev_do_write()
1898 if (oh.error <= -512 || oh.error > 0) in fuse_dev_do_write()
1901 spin_lock(&fpq->lock); in fuse_dev_do_write()
1903 if (fpq->connected) in fuse_dev_do_write()
1906 err = -ENOENT; in fuse_dev_do_write()
1908 spin_unlock(&fpq->lock); in fuse_dev_do_write()
1915 spin_unlock(&fpq->lock); in fuse_dev_do_write()
1919 err = -EINVAL; in fuse_dev_do_write()
1920 else if (oh.error == -ENOSYS) in fuse_dev_do_write()
1921 fc->no_interrupt = 1; in fuse_dev_do_write()
1922 else if (oh.error == -EAGAIN) in fuse_dev_do_write()
1930 clear_bit(FR_SENT, &req->flags); in fuse_dev_do_write()
1931 list_move(&req->list, &fpq->io); in fuse_dev_do_write()
1932 req->out.h = oh; in fuse_dev_do_write()
1933 set_bit(FR_LOCKED, &req->flags); in fuse_dev_do_write()
1934 spin_unlock(&fpq->lock); in fuse_dev_do_write()
1935 cs->req = req; in fuse_dev_do_write()
1936 if (!req->args->page_replace) in fuse_dev_do_write()
1937 cs->move_pages = 0; in fuse_dev_do_write()
1940 err = nbytes != sizeof(oh) ? -EINVAL : 0; in fuse_dev_do_write()
1942 err = copy_out_args(cs, req->args, nbytes); in fuse_dev_do_write()
1943 fuse_copy_finish(cs); in fuse_dev_do_write()
1945 if (!err && req->in.h.opcode == FUSE_CANONICAL_PATH) { in fuse_dev_do_write()
1946 char *path = (char *)req->args->out_args[0].value; in fuse_dev_do_write()
1948 path[req->args->out_args[0].size - 1] = 0; in fuse_dev_do_write()
1949 if (req->out.h.error != -ENOSYS) in fuse_dev_do_write()
1950 req->out.h.error = kern_path(path, 0, req->args->canonical_path); in fuse_dev_do_write()
1953 spin_lock(&fpq->lock); in fuse_dev_do_write()
1954 clear_bit(FR_LOCKED, &req->flags); in fuse_dev_do_write()
1955 if (!fpq->connected) in fuse_dev_do_write()
1956 err = -ENOENT; in fuse_dev_do_write()
1958 req->out.h.error = -EIO; in fuse_dev_do_write()
1959 if (!test_bit(FR_PRIVATE, &req->flags)) in fuse_dev_do_write()
1960 list_del_init(&req->list); in fuse_dev_do_write()
1961 spin_unlock(&fpq->lock); in fuse_dev_do_write()
1964 out: in fuse_dev_do_write()
1968 fuse_copy_finish(cs); in fuse_dev_do_write()
1969 goto out; in fuse_dev_do_write()
1974 struct fuse_copy_state cs; in fuse_dev_write() local
1975 struct fuse_dev *fud = fuse_get_dev(iocb->ki_filp); in fuse_dev_write()
1978 return -EPERM; in fuse_dev_write()
1981 return -EINVAL; in fuse_dev_write()
1983 fuse_copy_init(&cs, 0, from); in fuse_dev_write()
1985 return fuse_dev_do_write(fud, &cs, iov_iter_count(from)); in fuse_dev_write()
1989 struct file *out, loff_t *ppos, in fuse_dev_splice_write() argument
1996 struct fuse_copy_state cs; in fuse_dev_splice_write() local
2001 fud = fuse_get_dev(out); in fuse_dev_splice_write()
2003 return -EPERM; in fuse_dev_splice_write()
2007 head = pipe->head; in fuse_dev_splice_write()
2008 tail = pipe->tail; in fuse_dev_splice_write()
2009 mask = pipe->ring_size - 1; in fuse_dev_splice_write()
2010 count = head - tail; in fuse_dev_splice_write()
2015 return -ENOMEM; in fuse_dev_splice_write()
2021 rem += pipe->bufs[idx & mask].len; in fuse_dev_splice_write()
2023 ret = -EINVAL; in fuse_dev_splice_write()
2035 ibuf = &pipe->bufs[tail & mask]; in fuse_dev_splice_write()
2038 if (rem >= ibuf->len) { in fuse_dev_splice_write()
2040 ibuf->ops = NULL; in fuse_dev_splice_write()
2042 pipe->tail = tail; in fuse_dev_splice_write()
2048 obuf->flags &= ~PIPE_BUF_FLAG_GIFT; in fuse_dev_splice_write()
2049 obuf->len = rem; in fuse_dev_splice_write()
2050 ibuf->offset += obuf->len; in fuse_dev_splice_write()
2051 ibuf->len -= obuf->len; in fuse_dev_splice_write()
2054 rem -= obuf->len; in fuse_dev_splice_write()
2058 fuse_copy_init(&cs, 0, NULL); in fuse_dev_splice_write()
2059 cs.pipebufs = bufs; in fuse_dev_splice_write()
2060 cs.nr_segs = nbuf; in fuse_dev_splice_write()
2061 cs.pipe = pipe; in fuse_dev_splice_write()
2064 cs.move_pages = 1; in fuse_dev_splice_write()
2066 ret = fuse_dev_do_write(fud, &cs, len); in fuse_dev_splice_write()
2073 if (buf->ops) in fuse_dev_splice_write()
2091 fiq = &fud->fc->iq; in fuse_dev_poll()
2092 poll_wait(file, &fiq->waitq, wait); in fuse_dev_poll()
2094 spin_lock(&fiq->lock); in fuse_dev_poll()
2095 if (!fiq->connected) in fuse_dev_poll()
2099 spin_unlock(&fiq->lock); in fuse_dev_poll()
2109 req = list_entry(head->next, struct fuse_req, list); in end_requests()
2110 req->out.h.error = -ECONNABORTED; in end_requests()
2111 clear_bit(FR_SENT, &req->flags); in end_requests()
2112 list_del_init(&req->list); in end_requests()
2121 p = rb_first(&fc->polled_files); in end_polls()
2126 wake_up_interruptible_all(&ff->poll_wait); in end_polls()
2143 * Aborting requests under I/O goes as follows: 1: Separate out unlocked
2152 struct fuse_iqueue *fiq = &fc->iq; in fuse_abort_conn()
2154 spin_lock(&fc->lock); in fuse_abort_conn()
2155 if (fc->connected) { in fuse_abort_conn()
2161 /* Background queuing checks fc->connected under bg_lock */ in fuse_abort_conn()
2162 spin_lock(&fc->bg_lock); in fuse_abort_conn()
2163 fc->connected = 0; in fuse_abort_conn()
2164 spin_unlock(&fc->bg_lock); in fuse_abort_conn()
2167 list_for_each_entry(fud, &fc->devices, entry) { in fuse_abort_conn()
2168 struct fuse_pqueue *fpq = &fud->pq; in fuse_abort_conn()
2170 spin_lock(&fpq->lock); in fuse_abort_conn()
2171 fpq->connected = 0; in fuse_abort_conn()
2172 list_for_each_entry_safe(req, next, &fpq->io, list) { in fuse_abort_conn()
2173 req->out.h.error = -ECONNABORTED; in fuse_abort_conn()
2174 spin_lock(&req->waitq.lock); in fuse_abort_conn()
2175 set_bit(FR_ABORTED, &req->flags); in fuse_abort_conn()
2176 if (!test_bit(FR_LOCKED, &req->flags)) { in fuse_abort_conn()
2177 set_bit(FR_PRIVATE, &req->flags); in fuse_abort_conn()
2179 list_move(&req->list, &to_end); in fuse_abort_conn()
2181 spin_unlock(&req->waitq.lock); in fuse_abort_conn()
2184 list_splice_tail_init(&fpq->processing[i], in fuse_abort_conn()
2186 spin_unlock(&fpq->lock); in fuse_abort_conn()
2188 spin_lock(&fc->bg_lock); in fuse_abort_conn()
2189 fc->blocked = 0; in fuse_abort_conn()
2190 fc->max_background = UINT_MAX; in fuse_abort_conn()
2192 spin_unlock(&fc->bg_lock); in fuse_abort_conn()
2194 spin_lock(&fiq->lock); in fuse_abort_conn()
2195 fiq->connected = 0; in fuse_abort_conn()
2196 list_for_each_entry(req, &fiq->pending, list) in fuse_abort_conn()
2197 clear_bit(FR_PENDING, &req->flags); in fuse_abort_conn()
2198 list_splice_tail_init(&fiq->pending, &to_end); in fuse_abort_conn()
2201 wake_up_all(&fiq->waitq); in fuse_abort_conn()
2202 spin_unlock(&fiq->lock); in fuse_abort_conn()
2203 kill_fasync(&fiq->fasync, SIGIO, POLL_IN); in fuse_abort_conn()
2205 wake_up_all(&fc->blocked_waitq); in fuse_abort_conn()
2206 spin_unlock(&fc->lock); in fuse_abort_conn()
2210 spin_unlock(&fc->lock); in fuse_abort_conn()
2219 wait_event(fc->blocked_waitq, atomic_read(&fc->num_waiting) == 0); in fuse_wait_aborted()
2227 struct fuse_conn *fc = fud->fc; in fuse_dev_release()
2228 struct fuse_pqueue *fpq = &fud->pq; in fuse_dev_release()
2232 spin_lock(&fpq->lock); in fuse_dev_release()
2233 WARN_ON(!list_empty(&fpq->io)); in fuse_dev_release()
2235 list_splice_init(&fpq->processing[i], &to_end); in fuse_dev_release()
2236 spin_unlock(&fpq->lock); in fuse_dev_release()
2241 if (atomic_dec_and_test(&fc->dev_count)) { in fuse_dev_release()
2242 WARN_ON(fc->iq.fasync != NULL); in fuse_dev_release()
2256 return -EPERM; in fuse_dev_fasync()
2258 /* No locking - fasync_helper does its own locking */ in fuse_dev_fasync()
2259 return fasync_helper(fd, file, on, &fud->fc->iq.fasync); in fuse_dev_fasync()
2266 if (new->private_data) in fuse_device_clone()
2267 return -EINVAL; in fuse_device_clone()
2271 return -ENOMEM; in fuse_device_clone()
2273 new->private_data = fud; in fuse_device_clone()
2274 atomic_inc(&fc->dev_count); in fuse_device_clone()
2288 res = -EFAULT; in fuse_dev_ioctl()
2292 res = -EINVAL; in fuse_dev_ioctl()
2295 * Check against file->f_op because CUSE in fuse_dev_ioctl()
2298 if (old->f_op == file->f_op && in fuse_dev_ioctl()
2299 old->f_cred->user_ns == in fuse_dev_ioctl()
2300 file->f_cred->user_ns) in fuse_dev_ioctl()
2305 res = fuse_device_clone(fud->fc, file); in fuse_dev_ioctl()
2313 res = -EFAULT; in fuse_dev_ioctl()
2315 res = -EINVAL; in fuse_dev_ioctl()
2322 res = -ENOTTY; in fuse_dev_ioctl()
2352 int err = -ENOMEM; in fuse_dev_init()
2357 goto out; in fuse_dev_init()
2367 out: in fuse_dev_init()