Lines Matching +full:num +full:- +full:cs
3 Copyright (C) 2001-2008 Miklos Szeredi <miklos@szeredi.hu>
33 * Lockless access is OK, because file->private data is set in fuse_get_dev()
36 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 req->pages = pages; in fuse_request_init()
51 req->page_descs = page_descs; in fuse_request_init()
52 req->max_pages = npages; in fuse_request_init()
53 __set_bit(FR_PENDING, &req->flags); in fuse_request_init()
64 pages = req->inline_pages; in __fuse_request_alloc()
65 page_descs = req->inline_page_descs; in __fuse_request_alloc()
100 if (req->pages != req->inline_pages) { in fuse_request_free()
101 kfree(req->pages); in fuse_request_free()
102 kfree(req->page_descs); in fuse_request_free()
109 refcount_inc(&req->count); in __fuse_get_request()
115 refcount_dec(&req->count); in __fuse_put_request()
122 fc->initialized = 1; in fuse_set_initialized()
127 return !fc->initialized || (for_background && fc->blocked); in fuse_block_alloc()
133 * lockess check of fc->connected is okay, because atomic_dec_and_test() in fuse_drop_waiting()
135 * to ensure no wake-up is missed. in fuse_drop_waiting()
137 if (atomic_dec_and_test(&fc->num_waiting) && in fuse_drop_waiting()
138 !READ_ONCE(fc->connected)) { in fuse_drop_waiting()
140 wake_up_all(&fc->blocked_waitq); in fuse_drop_waiting()
149 atomic_inc(&fc->num_waiting); in __fuse_get_req()
152 err = -EINTR; in __fuse_get_req()
153 if (wait_event_killable_exclusive(fc->blocked_waitq, in __fuse_get_req()
160 err = -ENOTCONN; in __fuse_get_req()
161 if (!fc->connected) in __fuse_get_req()
164 err = -ECONNREFUSED; in __fuse_get_req()
165 if (fc->conn_error) in __fuse_get_req()
169 err = -ENOMEM; in __fuse_get_req()
172 wake_up(&fc->blocked_waitq); in __fuse_get_req()
176 req->in.h.uid = from_kuid(fc->user_ns, current_fsuid()); in __fuse_get_req()
177 req->in.h.gid = from_kgid(fc->user_ns, current_fsgid()); in __fuse_get_req()
178 req->in.h.pid = pid_nr_ns(task_pid(current), fc->pid_ns); in __fuse_get_req()
180 __set_bit(FR_WAITING, &req->flags); in __fuse_get_req()
182 __set_bit(FR_BACKGROUND, &req->flags); in __fuse_get_req()
184 if (unlikely(req->in.h.uid == ((uid_t)-1) || in __fuse_get_req()
185 req->in.h.gid == ((gid_t)-1))) { in __fuse_get_req()
187 return ERR_PTR(-EOVERFLOW); in __fuse_get_req()
210 * Return request in fuse_file->reserved_req. However that may
218 struct fuse_file *ff = file->private_data; in get_reserved_req()
221 wait_event(fc->reserved_req_waitq, ff->reserved_req); in get_reserved_req()
222 spin_lock(&fc->lock); in get_reserved_req()
223 if (ff->reserved_req) { in get_reserved_req()
224 req = ff->reserved_req; in get_reserved_req()
225 ff->reserved_req = NULL; in get_reserved_req()
226 req->stolen_file = get_file(file); in get_reserved_req()
228 spin_unlock(&fc->lock); in get_reserved_req()
235 * Put stolen request back into fuse_file->reserved_req
239 struct file *file = req->stolen_file; in put_reserved_req()
240 struct fuse_file *ff = file->private_data; in put_reserved_req()
242 spin_lock(&fc->lock); in put_reserved_req()
243 fuse_request_init(req, req->pages, req->page_descs, req->max_pages); in put_reserved_req()
244 BUG_ON(ff->reserved_req); in put_reserved_req()
245 ff->reserved_req = req; in put_reserved_req()
246 wake_up_all(&fc->reserved_req_waitq); in put_reserved_req()
247 spin_unlock(&fc->lock); in put_reserved_req()
269 atomic_inc(&fc->num_waiting); in fuse_get_req_nofail_nopages()
270 wait_event(fc->blocked_waitq, fc->initialized); in fuse_get_req_nofail_nopages()
277 req->in.h.uid = from_kuid_munged(fc->user_ns, current_fsuid()); in fuse_get_req_nofail_nopages()
278 req->in.h.gid = from_kgid_munged(fc->user_ns, current_fsgid()); in fuse_get_req_nofail_nopages()
279 req->in.h.pid = pid_nr_ns(task_pid(current), fc->pid_ns); in fuse_get_req_nofail_nopages()
281 __set_bit(FR_WAITING, &req->flags); in fuse_get_req_nofail_nopages()
282 __clear_bit(FR_BACKGROUND, &req->flags); in fuse_get_req_nofail_nopages()
288 if (refcount_dec_and_test(&req->count)) { in fuse_put_request()
289 if (test_bit(FR_BACKGROUND, &req->flags)) { in fuse_put_request()
294 spin_lock(&fc->lock); in fuse_put_request()
295 if (!fc->blocked) in fuse_put_request()
296 wake_up(&fc->blocked_waitq); in fuse_put_request()
297 spin_unlock(&fc->lock); in fuse_put_request()
300 if (test_bit(FR_WAITING, &req->flags)) { in fuse_put_request()
301 __clear_bit(FR_WAITING, &req->flags); in fuse_put_request()
305 if (req->stolen_file) in fuse_put_request()
326 return ++fiq->reqctr; in fuse_get_unique()
331 req->in.h.len = sizeof(struct fuse_in_header) + in queue_request()
332 len_args(req->in.numargs, (struct fuse_arg *) req->in.args); in queue_request()
333 list_add_tail(&req->list, &fiq->pending); in queue_request()
334 wake_up(&fiq->waitq); in queue_request()
335 kill_fasync(&fiq->fasync, SIGIO, POLL_IN); in queue_request()
341 struct fuse_iqueue *fiq = &fc->iq; in fuse_queue_forget()
343 forget->forget_one.nodeid = nodeid; in fuse_queue_forget()
344 forget->forget_one.nlookup = nlookup; in fuse_queue_forget()
346 spin_lock(&fiq->lock); in fuse_queue_forget()
347 if (fiq->connected) { in fuse_queue_forget()
348 fiq->forget_list_tail->next = forget; in fuse_queue_forget()
349 fiq->forget_list_tail = forget; in fuse_queue_forget()
350 wake_up(&fiq->waitq); in fuse_queue_forget()
351 kill_fasync(&fiq->fasync, SIGIO, POLL_IN); in fuse_queue_forget()
355 spin_unlock(&fiq->lock); in fuse_queue_forget()
360 while (fc->active_background < fc->max_background && in flush_bg_queue()
361 !list_empty(&fc->bg_queue)) { in flush_bg_queue()
363 struct fuse_iqueue *fiq = &fc->iq; in flush_bg_queue()
365 req = list_entry(fc->bg_queue.next, struct fuse_req, list); in flush_bg_queue()
366 list_del(&req->list); in flush_bg_queue()
367 fc->active_background++; in flush_bg_queue()
368 spin_lock(&fiq->lock); in flush_bg_queue()
369 req->in.h.unique = fuse_get_unique(fiq); in flush_bg_queue()
371 spin_unlock(&fiq->lock); in flush_bg_queue()
385 struct fuse_iqueue *fiq = &fc->iq; in request_end()
387 if (test_and_set_bit(FR_FINISHED, &req->flags)) in request_end()
390 spin_lock(&fiq->lock); in request_end()
391 list_del_init(&req->intr_entry); in request_end()
392 spin_unlock(&fiq->lock); in request_end()
393 WARN_ON(test_bit(FR_PENDING, &req->flags)); in request_end()
394 WARN_ON(test_bit(FR_SENT, &req->flags)); in request_end()
395 if (test_bit(FR_BACKGROUND, &req->flags)) { in request_end()
396 spin_lock(&fc->lock); in request_end()
397 clear_bit(FR_BACKGROUND, &req->flags); in request_end()
398 if (fc->num_background == fc->max_background) { in request_end()
399 fc->blocked = 0; in request_end()
400 wake_up(&fc->blocked_waitq); in request_end()
401 } else if (!fc->blocked) { in request_end()
405 * fc->blocked with waiters with the wake_up() call in request_end()
408 if (waitqueue_active(&fc->blocked_waitq)) in request_end()
409 wake_up(&fc->blocked_waitq); in request_end()
412 if (fc->num_background == fc->congestion_threshold && fc->sb) { in request_end()
413 clear_bdi_congested(fc->sb->s_bdi, BLK_RW_SYNC); in request_end()
414 clear_bdi_congested(fc->sb->s_bdi, BLK_RW_ASYNC); in request_end()
416 fc->num_background--; in request_end()
417 fc->active_background--; in request_end()
419 spin_unlock(&fc->lock); in request_end()
421 wake_up(&req->waitq); in request_end()
422 if (req->end) in request_end()
423 req->end(fc, req); in request_end()
430 spin_lock(&fiq->lock); in queue_interrupt()
431 if (test_bit(FR_FINISHED, &req->flags)) { in queue_interrupt()
432 spin_unlock(&fiq->lock); in queue_interrupt()
435 if (list_empty(&req->intr_entry)) { in queue_interrupt()
436 list_add_tail(&req->intr_entry, &fiq->interrupts); in queue_interrupt()
437 wake_up(&fiq->waitq); in queue_interrupt()
439 spin_unlock(&fiq->lock); in queue_interrupt()
440 kill_fasync(&fiq->fasync, SIGIO, POLL_IN); in queue_interrupt()
445 struct fuse_iqueue *fiq = &fc->iq; in request_wait_answer()
448 if (!fc->no_interrupt) { in request_wait_answer()
450 err = wait_event_interruptible(req->waitq, in request_wait_answer()
451 test_bit(FR_FINISHED, &req->flags)); in request_wait_answer()
455 set_bit(FR_INTERRUPTED, &req->flags); in request_wait_answer()
458 if (test_bit(FR_SENT, &req->flags)) in request_wait_answer()
462 if (!test_bit(FR_FORCE, &req->flags)) { in request_wait_answer()
464 err = wait_event_killable(req->waitq, in request_wait_answer()
465 test_bit(FR_FINISHED, &req->flags)); in request_wait_answer()
469 spin_lock(&fiq->lock); in request_wait_answer()
471 if (test_bit(FR_PENDING, &req->flags)) { in request_wait_answer()
472 list_del(&req->list); in request_wait_answer()
473 spin_unlock(&fiq->lock); in request_wait_answer()
475 req->out.h.error = -EINTR; in request_wait_answer()
478 spin_unlock(&fiq->lock); in request_wait_answer()
485 wait_event(req->waitq, test_bit(FR_FINISHED, &req->flags)); in request_wait_answer()
490 struct fuse_iqueue *fiq = &fc->iq; in __fuse_request_send()
492 BUG_ON(test_bit(FR_BACKGROUND, &req->flags)); in __fuse_request_send()
493 spin_lock(&fiq->lock); in __fuse_request_send()
494 if (!fiq->connected) { in __fuse_request_send()
495 spin_unlock(&fiq->lock); in __fuse_request_send()
496 req->out.h.error = -ENOTCONN; in __fuse_request_send()
498 req->in.h.unique = fuse_get_unique(fiq); in __fuse_request_send()
503 spin_unlock(&fiq->lock); in __fuse_request_send()
513 __set_bit(FR_ISREPLY, &req->flags); in fuse_request_send()
514 if (!test_bit(FR_WAITING, &req->flags)) { in fuse_request_send()
515 __set_bit(FR_WAITING, &req->flags); in fuse_request_send()
516 atomic_inc(&fc->num_waiting); in fuse_request_send()
524 if (fc->minor < 4 && args->in.h.opcode == FUSE_STATFS) in fuse_adjust_compat()
525 args->out.args[0].size = FUSE_COMPAT_STATFS_SIZE; in fuse_adjust_compat()
527 if (fc->minor < 9) { in fuse_adjust_compat()
528 switch (args->in.h.opcode) { in fuse_adjust_compat()
535 args->out.args[0].size = FUSE_COMPAT_ENTRY_OUT_SIZE; in fuse_adjust_compat()
539 args->out.args[0].size = FUSE_COMPAT_ATTR_OUT_SIZE; in fuse_adjust_compat()
543 if (fc->minor < 12) { in fuse_adjust_compat()
544 switch (args->in.h.opcode) { in fuse_adjust_compat()
546 args->in.args[0].size = sizeof(struct fuse_open_in); in fuse_adjust_compat()
549 args->in.args[0].size = FUSE_COMPAT_MKNOD_IN_SIZE; in fuse_adjust_compat()
564 /* Needs to be done after fuse_get_req() so that fc->minor is valid */ in fuse_simple_request()
567 req->in.h.opcode = args->in.h.opcode; in fuse_simple_request()
568 req->in.h.nodeid = args->in.h.nodeid; in fuse_simple_request()
569 req->in.numargs = args->in.numargs; in fuse_simple_request()
570 memcpy(req->in.args, args->in.args, in fuse_simple_request()
571 args->in.numargs * sizeof(struct fuse_in_arg)); in fuse_simple_request()
572 req->out.argvar = args->out.argvar; in fuse_simple_request()
573 req->out.numargs = args->out.numargs; in fuse_simple_request()
574 memcpy(req->out.args, args->out.args, in fuse_simple_request()
575 args->out.numargs * sizeof(struct fuse_arg)); in fuse_simple_request()
577 ret = req->out.h.error; in fuse_simple_request()
578 if (!ret && args->out.argvar) { in fuse_simple_request()
579 BUG_ON(args->out.numargs != 1); in fuse_simple_request()
580 ret = req->out.args[0].size; in fuse_simple_request()
588 * Called under fc->lock
590 * fc->connected must have been checked previously
595 BUG_ON(!test_bit(FR_BACKGROUND, &req->flags)); in fuse_request_send_background_locked()
596 if (!test_bit(FR_WAITING, &req->flags)) { in fuse_request_send_background_locked()
597 __set_bit(FR_WAITING, &req->flags); in fuse_request_send_background_locked()
598 atomic_inc(&fc->num_waiting); in fuse_request_send_background_locked()
600 __set_bit(FR_ISREPLY, &req->flags); in fuse_request_send_background_locked()
601 fc->num_background++; in fuse_request_send_background_locked()
602 if (fc->num_background == fc->max_background) in fuse_request_send_background_locked()
603 fc->blocked = 1; in fuse_request_send_background_locked()
604 if (fc->num_background == fc->congestion_threshold && fc->sb) { in fuse_request_send_background_locked()
605 set_bdi_congested(fc->sb->s_bdi, BLK_RW_SYNC); in fuse_request_send_background_locked()
606 set_bdi_congested(fc->sb->s_bdi, BLK_RW_ASYNC); in fuse_request_send_background_locked()
608 list_add_tail(&req->list, &fc->bg_queue); in fuse_request_send_background_locked()
614 BUG_ON(!req->end); in fuse_request_send_background()
615 spin_lock(&fc->lock); in fuse_request_send_background()
616 if (fc->connected) { in fuse_request_send_background()
618 spin_unlock(&fc->lock); in fuse_request_send_background()
620 spin_unlock(&fc->lock); in fuse_request_send_background()
621 req->out.h.error = -ENOTCONN; in fuse_request_send_background()
622 req->end(fc, req); in fuse_request_send_background()
631 int err = -ENODEV; in fuse_request_send_notify_reply()
632 struct fuse_iqueue *fiq = &fc->iq; in fuse_request_send_notify_reply()
634 __clear_bit(FR_ISREPLY, &req->flags); in fuse_request_send_notify_reply()
635 req->in.h.unique = unique; in fuse_request_send_notify_reply()
636 spin_lock(&fiq->lock); in fuse_request_send_notify_reply()
637 if (fiq->connected) { in fuse_request_send_notify_reply()
641 spin_unlock(&fiq->lock); in fuse_request_send_notify_reply()
656 req->in.h.opcode = FUSE_FORGET; in fuse_force_forget()
657 req->in.h.nodeid = nodeid; in fuse_force_forget()
658 req->in.numargs = 1; in fuse_force_forget()
659 req->in.args[0].size = sizeof(inarg); in fuse_force_forget()
660 req->in.args[0].value = &inarg; in fuse_force_forget()
661 __clear_bit(FR_ISREPLY, &req->flags); in fuse_force_forget()
669 * anything that could cause a page-fault. If the request was already
676 spin_lock(&req->waitq.lock); in lock_request()
677 if (test_bit(FR_ABORTED, &req->flags)) in lock_request()
678 err = -ENOENT; in lock_request()
680 set_bit(FR_LOCKED, &req->flags); in lock_request()
681 spin_unlock(&req->waitq.lock); in lock_request()
694 spin_lock(&req->waitq.lock); in unlock_request()
695 if (test_bit(FR_ABORTED, &req->flags)) in unlock_request()
696 err = -ENOENT; in unlock_request()
698 clear_bit(FR_LOCKED, &req->flags); in unlock_request()
699 spin_unlock(&req->waitq.lock); in unlock_request()
718 static void fuse_copy_init(struct fuse_copy_state *cs, int write, in fuse_copy_init() argument
721 memset(cs, 0, sizeof(*cs)); in fuse_copy_init()
722 cs->write = write; in fuse_copy_init()
723 cs->iter = iter; in fuse_copy_init()
727 static void fuse_copy_finish(struct fuse_copy_state *cs) in fuse_copy_finish() argument
729 if (cs->currbuf) { in fuse_copy_finish()
730 struct pipe_buffer *buf = cs->currbuf; in fuse_copy_finish()
732 if (cs->write) in fuse_copy_finish()
733 buf->len = PAGE_SIZE - cs->len; in fuse_copy_finish()
734 cs->currbuf = NULL; in fuse_copy_finish()
735 } else if (cs->pg) { in fuse_copy_finish()
736 if (cs->write) { in fuse_copy_finish()
737 flush_dcache_page(cs->pg); in fuse_copy_finish()
738 set_page_dirty_lock(cs->pg); in fuse_copy_finish()
740 put_page(cs->pg); in fuse_copy_finish()
742 cs->pg = NULL; in fuse_copy_finish()
749 static int fuse_copy_fill(struct fuse_copy_state *cs) in fuse_copy_fill() argument
754 err = unlock_request(cs->req); in fuse_copy_fill()
758 fuse_copy_finish(cs); in fuse_copy_fill()
759 if (cs->pipebufs) { in fuse_copy_fill()
760 struct pipe_buffer *buf = cs->pipebufs; in fuse_copy_fill()
762 if (!cs->write) { in fuse_copy_fill()
763 err = pipe_buf_confirm(cs->pipe, buf); in fuse_copy_fill()
767 BUG_ON(!cs->nr_segs); in fuse_copy_fill()
768 cs->currbuf = buf; in fuse_copy_fill()
769 cs->pg = buf->page; in fuse_copy_fill()
770 cs->offset = buf->offset; in fuse_copy_fill()
771 cs->len = buf->len; in fuse_copy_fill()
772 cs->pipebufs++; in fuse_copy_fill()
773 cs->nr_segs--; in fuse_copy_fill()
775 if (cs->nr_segs == cs->pipe->buffers) in fuse_copy_fill()
776 return -EIO; in fuse_copy_fill()
780 return -ENOMEM; in fuse_copy_fill()
782 buf->page = page; in fuse_copy_fill()
783 buf->offset = 0; in fuse_copy_fill()
784 buf->len = 0; in fuse_copy_fill()
786 cs->currbuf = buf; in fuse_copy_fill()
787 cs->pg = page; in fuse_copy_fill()
788 cs->offset = 0; in fuse_copy_fill()
789 cs->len = PAGE_SIZE; in fuse_copy_fill()
790 cs->pipebufs++; in fuse_copy_fill()
791 cs->nr_segs++; in fuse_copy_fill()
795 err = iov_iter_get_pages(cs->iter, &page, PAGE_SIZE, 1, &off); in fuse_copy_fill()
799 cs->len = err; in fuse_copy_fill()
800 cs->offset = off; in fuse_copy_fill()
801 cs->pg = page; in fuse_copy_fill()
802 iov_iter_advance(cs->iter, err); in fuse_copy_fill()
805 return lock_request(cs->req); in fuse_copy_fill()
809 static int fuse_copy_do(struct fuse_copy_state *cs, void **val, unsigned *size) in fuse_copy_do() argument
811 unsigned ncpy = min(*size, cs->len); in fuse_copy_do()
813 void *pgaddr = kmap_atomic(cs->pg); in fuse_copy_do()
814 void *buf = pgaddr + cs->offset; in fuse_copy_do()
816 if (cs->write) in fuse_copy_do()
824 *size -= ncpy; in fuse_copy_do()
825 cs->len -= ncpy; in fuse_copy_do()
826 cs->offset += ncpy; in fuse_copy_do()
833 page->mapping != NULL || in fuse_check_page()
834 (page->flags & PAGE_FLAGS_CHECK_AT_PREP & in fuse_check_page()
843 …=%i, mapcount=%i, mapping=%p\n", page, page->index, page->flags, page_count(page), page_mapcount(p… in fuse_check_page()
849 static int fuse_try_move_page(struct fuse_copy_state *cs, struct page **pagep) in fuse_try_move_page() argument
854 struct pipe_buffer *buf = cs->pipebufs; in fuse_try_move_page()
857 err = unlock_request(cs->req); in fuse_try_move_page()
861 fuse_copy_finish(cs); in fuse_try_move_page()
863 err = pipe_buf_confirm(cs->pipe, buf); in fuse_try_move_page()
867 BUG_ON(!cs->nr_segs); in fuse_try_move_page()
868 cs->currbuf = buf; in fuse_try_move_page()
869 cs->len = buf->len; in fuse_try_move_page()
870 cs->pipebufs++; in fuse_try_move_page()
871 cs->nr_segs--; in fuse_try_move_page()
873 if (cs->len != PAGE_SIZE) in fuse_try_move_page()
876 if (pipe_buf_steal(cs->pipe, buf) != 0) in fuse_try_move_page()
879 newpage = buf->page; in fuse_try_move_page()
910 if (!(buf->flags & PIPE_BUF_FLAG_LRU)) in fuse_try_move_page()
914 spin_lock(&cs->req->waitq.lock); in fuse_try_move_page()
915 if (test_bit(FR_ABORTED, &cs->req->flags)) in fuse_try_move_page()
916 err = -ENOENT; in fuse_try_move_page()
919 spin_unlock(&cs->req->waitq.lock); in fuse_try_move_page()
928 /* Drop ref for ap->pages[] array */ in fuse_try_move_page()
930 cs->len = 0; in fuse_try_move_page()
941 cs->pg = buf->page; in fuse_try_move_page()
942 cs->offset = buf->offset; in fuse_try_move_page()
944 err = lock_request(cs->req); in fuse_try_move_page()
951 static int fuse_ref_page(struct fuse_copy_state *cs, struct page *page, in fuse_ref_page() argument
957 if (cs->nr_segs == cs->pipe->buffers) in fuse_ref_page()
958 return -EIO; in fuse_ref_page()
961 err = unlock_request(cs->req); in fuse_ref_page()
967 fuse_copy_finish(cs); in fuse_ref_page()
969 buf = cs->pipebufs; in fuse_ref_page()
970 buf->page = page; in fuse_ref_page()
971 buf->offset = offset; in fuse_ref_page()
972 buf->len = count; in fuse_ref_page()
974 cs->pipebufs++; in fuse_ref_page()
975 cs->nr_segs++; in fuse_ref_page()
976 cs->len = 0; in fuse_ref_page()
985 static int fuse_copy_page(struct fuse_copy_state *cs, struct page **pagep, in fuse_copy_page() argument
995 if (cs->write && cs->pipebufs && page) { in fuse_copy_page()
1000 if (cs->req->in.user_pages) { in fuse_copy_page()
1001 err = fuse_copy_fill(cs); in fuse_copy_page()
1005 return fuse_ref_page(cs, page, offset, count); in fuse_copy_page()
1007 } else if (!cs->len) { in fuse_copy_page()
1008 if (cs->move_pages && page && in fuse_copy_page()
1010 err = fuse_try_move_page(cs, pagep); in fuse_copy_page()
1014 err = fuse_copy_fill(cs); in fuse_copy_page()
1022 offset += fuse_copy_do(cs, &buf, &count); in fuse_copy_page()
1025 offset += fuse_copy_do(cs, NULL, &count); in fuse_copy_page()
1027 if (page && !cs->write) in fuse_copy_page()
1033 static int fuse_copy_pages(struct fuse_copy_state *cs, unsigned nbytes, in fuse_copy_pages() argument
1037 struct fuse_req *req = cs->req; in fuse_copy_pages()
1039 for (i = 0; i < req->num_pages && (nbytes || zeroing); i++) { in fuse_copy_pages()
1041 unsigned offset = req->page_descs[i].offset; in fuse_copy_pages()
1042 unsigned count = min(nbytes, req->page_descs[i].length); in fuse_copy_pages()
1044 err = fuse_copy_page(cs, &req->pages[i], offset, count, in fuse_copy_pages()
1049 nbytes -= count; in fuse_copy_pages()
1055 static int fuse_copy_one(struct fuse_copy_state *cs, void *val, unsigned size) in fuse_copy_one() argument
1058 if (!cs->len) { in fuse_copy_one()
1059 int err = fuse_copy_fill(cs); in fuse_copy_one()
1063 fuse_copy_do(cs, &val, &size); in fuse_copy_one()
1069 static int fuse_copy_args(struct fuse_copy_state *cs, unsigned numargs, in fuse_copy_args() argument
1078 if (i == numargs - 1 && argpages) in fuse_copy_args()
1079 err = fuse_copy_pages(cs, arg->size, zeroing); in fuse_copy_args()
1081 err = fuse_copy_one(cs, arg->value, arg->size); in fuse_copy_args()
1088 return fiq->forget_list_head.next != NULL; in forget_pending()
1093 return !list_empty(&fiq->pending) || !list_empty(&fiq->interrupts) || in request_pending()
1103 * Called with fiq->lock held, releases it
1106 struct fuse_copy_state *cs, in fuse_read_interrupt() argument
1108 __releases(fiq->lock) in fuse_read_interrupt()
1115 list_del_init(&req->intr_entry); in fuse_read_interrupt()
1116 req->intr_unique = fuse_get_unique(fiq); in fuse_read_interrupt()
1121 ih.unique = req->intr_unique; in fuse_read_interrupt()
1122 arg.unique = req->in.h.unique; in fuse_read_interrupt()
1124 spin_unlock(&fiq->lock); in fuse_read_interrupt()
1126 return -EINVAL; in fuse_read_interrupt()
1128 err = fuse_copy_one(cs, &ih, sizeof(ih)); in fuse_read_interrupt()
1130 err = fuse_copy_one(cs, &arg, sizeof(arg)); in fuse_read_interrupt()
1131 fuse_copy_finish(cs); in fuse_read_interrupt()
1140 struct fuse_forget_link *head = fiq->forget_list_head.next; in dequeue_forget()
1145 newhead = &(*newhead)->next; in dequeue_forget()
1147 fiq->forget_list_head.next = *newhead; in dequeue_forget()
1149 if (fiq->forget_list_head.next == NULL) in dequeue_forget()
1150 fiq->forget_list_tail = &fiq->forget_list_head; in dequeue_forget()
1159 struct fuse_copy_state *cs, in fuse_read_single_forget() argument
1161 __releases(fiq->lock) in fuse_read_single_forget()
1166 .nlookup = forget->forget_one.nlookup, in fuse_read_single_forget()
1170 .nodeid = forget->forget_one.nodeid, in fuse_read_single_forget()
1175 spin_unlock(&fiq->lock); in fuse_read_single_forget()
1178 return -EINVAL; in fuse_read_single_forget()
1180 err = fuse_copy_one(cs, &ih, sizeof(ih)); in fuse_read_single_forget()
1182 err = fuse_copy_one(cs, &arg, sizeof(arg)); in fuse_read_single_forget()
1183 fuse_copy_finish(cs); in fuse_read_single_forget()
1192 struct fuse_copy_state *cs, size_t nbytes) in fuse_read_batch_forget() argument
1193 __releases(fiq->lock) in fuse_read_batch_forget()
1207 spin_unlock(&fiq->lock); in fuse_read_batch_forget()
1208 return -EINVAL; in fuse_read_batch_forget()
1211 max_forgets = (nbytes - ih.len) / sizeof(struct fuse_forget_one); in fuse_read_batch_forget()
1213 spin_unlock(&fiq->lock); in fuse_read_batch_forget()
1217 err = fuse_copy_one(cs, &ih, sizeof(ih)); in fuse_read_batch_forget()
1219 err = fuse_copy_one(cs, &arg, sizeof(arg)); in fuse_read_batch_forget()
1225 err = fuse_copy_one(cs, &forget->forget_one, in fuse_read_batch_forget()
1226 sizeof(forget->forget_one)); in fuse_read_batch_forget()
1228 head = forget->next; in fuse_read_batch_forget()
1232 fuse_copy_finish(cs); in fuse_read_batch_forget()
1241 struct fuse_copy_state *cs, in fuse_read_forget() argument
1243 __releases(fiq->lock) in fuse_read_forget()
1245 if (fc->minor < 16 || fiq->forget_list_head.next->next == NULL) in fuse_read_forget()
1246 return fuse_read_single_forget(fiq, cs, nbytes); in fuse_read_forget()
1248 return fuse_read_batch_forget(fiq, cs, nbytes); in fuse_read_forget()
1261 struct fuse_copy_state *cs, size_t nbytes) in fuse_dev_do_read() argument
1264 struct fuse_conn *fc = fud->fc; in fuse_dev_do_read()
1265 struct fuse_iqueue *fiq = &fc->iq; in fuse_dev_do_read()
1266 struct fuse_pqueue *fpq = &fud->pq; in fuse_dev_do_read()
1273 spin_lock(&fiq->lock); in fuse_dev_do_read()
1274 if (!fiq->connected || request_pending(fiq)) in fuse_dev_do_read()
1276 spin_unlock(&fiq->lock); in fuse_dev_do_read()
1278 if (file->f_flags & O_NONBLOCK) in fuse_dev_do_read()
1279 return -EAGAIN; in fuse_dev_do_read()
1280 err = wait_event_interruptible_exclusive(fiq->waitq, in fuse_dev_do_read()
1281 !fiq->connected || request_pending(fiq)); in fuse_dev_do_read()
1286 if (!fiq->connected) { in fuse_dev_do_read()
1287 err = (fc->aborted && fc->abort_err) ? -ECONNABORTED : -ENODEV; in fuse_dev_do_read()
1291 if (!list_empty(&fiq->interrupts)) { in fuse_dev_do_read()
1292 req = list_entry(fiq->interrupts.next, struct fuse_req, in fuse_dev_do_read()
1294 return fuse_read_interrupt(fiq, cs, nbytes, req); in fuse_dev_do_read()
1298 if (list_empty(&fiq->pending) || fiq->forget_batch-- > 0) in fuse_dev_do_read()
1299 return fuse_read_forget(fc, fiq, cs, nbytes); in fuse_dev_do_read()
1301 if (fiq->forget_batch <= -8) in fuse_dev_do_read()
1302 fiq->forget_batch = 16; in fuse_dev_do_read()
1305 req = list_entry(fiq->pending.next, struct fuse_req, list); in fuse_dev_do_read()
1306 clear_bit(FR_PENDING, &req->flags); in fuse_dev_do_read()
1307 list_del_init(&req->list); in fuse_dev_do_read()
1308 spin_unlock(&fiq->lock); in fuse_dev_do_read()
1310 in = &req->in; in fuse_dev_do_read()
1311 reqsize = in->h.len; in fuse_dev_do_read()
1315 req->out.h.error = -EIO; in fuse_dev_do_read()
1317 if (in->h.opcode == FUSE_SETXATTR) in fuse_dev_do_read()
1318 req->out.h.error = -E2BIG; in fuse_dev_do_read()
1322 spin_lock(&fpq->lock); in fuse_dev_do_read()
1323 list_add(&req->list, &fpq->io); in fuse_dev_do_read()
1324 spin_unlock(&fpq->lock); in fuse_dev_do_read()
1325 cs->req = req; in fuse_dev_do_read()
1326 err = fuse_copy_one(cs, &in->h, sizeof(in->h)); in fuse_dev_do_read()
1328 err = fuse_copy_args(cs, in->numargs, in->argpages, in fuse_dev_do_read()
1329 (struct fuse_arg *) in->args, 0); in fuse_dev_do_read()
1330 fuse_copy_finish(cs); in fuse_dev_do_read()
1331 spin_lock(&fpq->lock); in fuse_dev_do_read()
1332 clear_bit(FR_LOCKED, &req->flags); in fuse_dev_do_read()
1333 if (!fpq->connected) { in fuse_dev_do_read()
1334 err = (fc->aborted && fc->abort_err) ? -ECONNABORTED : -ENODEV; in fuse_dev_do_read()
1338 req->out.h.error = -EIO; in fuse_dev_do_read()
1341 if (!test_bit(FR_ISREPLY, &req->flags)) { in fuse_dev_do_read()
1345 list_move_tail(&req->list, &fpq->processing); in fuse_dev_do_read()
1347 set_bit(FR_SENT, &req->flags); in fuse_dev_do_read()
1348 spin_unlock(&fpq->lock); in fuse_dev_do_read()
1351 if (test_bit(FR_INTERRUPTED, &req->flags)) in fuse_dev_do_read()
1358 if (!test_bit(FR_PRIVATE, &req->flags)) in fuse_dev_do_read()
1359 list_del_init(&req->list); in fuse_dev_do_read()
1360 spin_unlock(&fpq->lock); in fuse_dev_do_read()
1365 spin_unlock(&fiq->lock); in fuse_dev_do_read()
1376 file->private_data = NULL; in fuse_dev_open()
1382 struct fuse_copy_state cs; in fuse_dev_read() local
1383 struct file *file = iocb->ki_filp; in fuse_dev_read()
1387 return -EPERM; in fuse_dev_read()
1390 return -EINVAL; in fuse_dev_read()
1392 fuse_copy_init(&cs, 1, to); in fuse_dev_read()
1394 return fuse_dev_do_read(fud, file, &cs, iov_iter_count(to)); in fuse_dev_read()
1404 struct fuse_copy_state cs; in fuse_dev_splice_read() local
1408 return -EPERM; in fuse_dev_splice_read()
1410 bufs = kvmalloc_array(pipe->buffers, sizeof(struct pipe_buffer), in fuse_dev_splice_read()
1413 return -ENOMEM; in fuse_dev_splice_read()
1415 fuse_copy_init(&cs, 1, NULL); in fuse_dev_splice_read()
1416 cs.pipebufs = bufs; in fuse_dev_splice_read()
1417 cs.pipe = pipe; in fuse_dev_splice_read()
1418 ret = fuse_dev_do_read(fud, in, &cs, len); in fuse_dev_splice_read()
1422 if (pipe->nrbufs + cs.nr_segs > pipe->buffers) { in fuse_dev_splice_read()
1423 ret = -EIO; in fuse_dev_splice_read()
1427 for (ret = total = 0; page_nr < cs.nr_segs; total += ret) { in fuse_dev_splice_read()
1429 * Need to be careful about this. Having buf->ops in module in fuse_dev_splice_read()
1441 for (; page_nr < cs.nr_segs; page_nr++) in fuse_dev_splice_read()
1449 struct fuse_copy_state *cs) in fuse_notify_poll() argument
1452 int err = -EINVAL; in fuse_notify_poll()
1457 err = fuse_copy_one(cs, &outarg, sizeof(outarg)); in fuse_notify_poll()
1461 fuse_copy_finish(cs); in fuse_notify_poll()
1465 fuse_copy_finish(cs); in fuse_notify_poll()
1470 struct fuse_copy_state *cs) in fuse_notify_inval_inode() argument
1473 int err = -EINVAL; in fuse_notify_inval_inode()
1478 err = fuse_copy_one(cs, &outarg, sizeof(outarg)); in fuse_notify_inval_inode()
1481 fuse_copy_finish(cs); in fuse_notify_inval_inode()
1483 down_read(&fc->killsb); in fuse_notify_inval_inode()
1484 err = -ENOENT; in fuse_notify_inval_inode()
1485 if (fc->sb) { in fuse_notify_inval_inode()
1486 err = fuse_reverse_inval_inode(fc->sb, outarg.ino, in fuse_notify_inval_inode()
1489 up_read(&fc->killsb); in fuse_notify_inval_inode()
1493 fuse_copy_finish(cs); in fuse_notify_inval_inode()
1498 struct fuse_copy_state *cs) in fuse_notify_inval_entry() argument
1501 int err = -ENOMEM; in fuse_notify_inval_entry()
1509 err = -EINVAL; in fuse_notify_inval_entry()
1513 err = fuse_copy_one(cs, &outarg, sizeof(outarg)); in fuse_notify_inval_entry()
1517 err = -ENAMETOOLONG; in fuse_notify_inval_entry()
1521 err = -EINVAL; in fuse_notify_inval_entry()
1527 err = fuse_copy_one(cs, buf, outarg.namelen + 1); in fuse_notify_inval_entry()
1530 fuse_copy_finish(cs); in fuse_notify_inval_entry()
1533 down_read(&fc->killsb); in fuse_notify_inval_entry()
1534 err = -ENOENT; in fuse_notify_inval_entry()
1535 if (fc->sb) in fuse_notify_inval_entry()
1536 err = fuse_reverse_inval_entry(fc->sb, outarg.parent, 0, &name); in fuse_notify_inval_entry()
1537 up_read(&fc->killsb); in fuse_notify_inval_entry()
1543 fuse_copy_finish(cs); in fuse_notify_inval_entry()
1548 struct fuse_copy_state *cs) in fuse_notify_delete() argument
1551 int err = -ENOMEM; in fuse_notify_delete()
1559 err = -EINVAL; in fuse_notify_delete()
1563 err = fuse_copy_one(cs, &outarg, sizeof(outarg)); in fuse_notify_delete()
1567 err = -ENAMETOOLONG; in fuse_notify_delete()
1571 err = -EINVAL; in fuse_notify_delete()
1577 err = fuse_copy_one(cs, buf, outarg.namelen + 1); in fuse_notify_delete()
1580 fuse_copy_finish(cs); in fuse_notify_delete()
1583 down_read(&fc->killsb); in fuse_notify_delete()
1584 err = -ENOENT; in fuse_notify_delete()
1585 if (fc->sb) in fuse_notify_delete()
1586 err = fuse_reverse_inval_entry(fc->sb, outarg.parent, in fuse_notify_delete()
1588 up_read(&fc->killsb); in fuse_notify_delete()
1594 fuse_copy_finish(cs); in fuse_notify_delete()
1599 struct fuse_copy_state *cs) in fuse_notify_store() argument
1608 unsigned int num; in fuse_notify_store() local
1612 err = -EINVAL; in fuse_notify_store()
1616 err = fuse_copy_one(cs, &outarg, sizeof(outarg)); in fuse_notify_store()
1620 err = -EINVAL; in fuse_notify_store()
1621 if (size - sizeof(outarg) != outarg.size) in fuse_notify_store()
1626 down_read(&fc->killsb); in fuse_notify_store()
1628 err = -ENOENT; in fuse_notify_store()
1629 if (!fc->sb) in fuse_notify_store()
1632 inode = ilookup5(fc->sb, nodeid, fuse_inode_eq, &nodeid); in fuse_notify_store()
1636 mapping = inode->i_mapping; in fuse_notify_store()
1646 num = outarg.size; in fuse_notify_store()
1647 while (num) { in fuse_notify_store()
1651 err = -ENOMEM; in fuse_notify_store()
1657 this_num = min_t(unsigned, num, PAGE_SIZE - offset); in fuse_notify_store()
1658 err = fuse_copy_page(cs, &page, offset, this_num, 0); in fuse_notify_store()
1668 num -= this_num; in fuse_notify_store()
1678 up_read(&fc->killsb); in fuse_notify_store()
1680 fuse_copy_finish(cs); in fuse_notify_store()
1686 release_pages(req->pages, req->num_pages); in fuse_retrieve_end()
1693 struct address_space *mapping = inode->i_mapping; in fuse_retrieve()
1697 unsigned int num; in fuse_retrieve() local
1702 offset = outarg->offset & ~PAGE_MASK; in fuse_retrieve()
1705 num = min(outarg->size, fc->max_write); in fuse_retrieve()
1706 if (outarg->offset > file_size) in fuse_retrieve()
1707 num = 0; in fuse_retrieve()
1708 else if (outarg->offset + num > file_size) in fuse_retrieve()
1709 num = file_size - outarg->offset; in fuse_retrieve()
1711 num_pages = (num + offset + PAGE_SIZE - 1) >> PAGE_SHIFT; in fuse_retrieve()
1718 req->in.h.opcode = FUSE_NOTIFY_REPLY; in fuse_retrieve()
1719 req->in.h.nodeid = outarg->nodeid; in fuse_retrieve()
1720 req->in.numargs = 2; in fuse_retrieve()
1721 req->in.argpages = 1; in fuse_retrieve()
1722 req->end = fuse_retrieve_end; in fuse_retrieve()
1724 index = outarg->offset >> PAGE_SHIFT; in fuse_retrieve()
1726 while (num && req->num_pages < num_pages) { in fuse_retrieve()
1734 this_num = min_t(unsigned, num, PAGE_SIZE - offset); in fuse_retrieve()
1735 req->pages[req->num_pages] = page; in fuse_retrieve()
1736 req->page_descs[req->num_pages].offset = offset; in fuse_retrieve()
1737 req->page_descs[req->num_pages].length = this_num; in fuse_retrieve()
1738 req->num_pages++; in fuse_retrieve()
1741 num -= this_num; in fuse_retrieve()
1745 req->misc.retrieve_in.offset = outarg->offset; in fuse_retrieve()
1746 req->misc.retrieve_in.size = total_len; in fuse_retrieve()
1747 req->in.args[0].size = sizeof(req->misc.retrieve_in); in fuse_retrieve()
1748 req->in.args[0].value = &req->misc.retrieve_in; in fuse_retrieve()
1749 req->in.args[1].size = total_len; in fuse_retrieve()
1751 err = fuse_request_send_notify_reply(fc, req, outarg->notify_unique); in fuse_retrieve()
1761 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()
1779 if (fc->sb) { in fuse_notify_retrieve()
1782 inode = ilookup5(fc->sb, nodeid, fuse_inode_eq, &nodeid); in fuse_notify_retrieve()
1788 up_read(&fc->killsb); in fuse_notify_retrieve()
1793 fuse_copy_finish(cs); in fuse_notify_retrieve()
1798 unsigned int size, struct fuse_copy_state *cs) in fuse_notify() argument
1801 cs->move_pages = 0; in fuse_notify()
1805 return fuse_notify_poll(fc, size, cs); in fuse_notify()
1808 return fuse_notify_inval_inode(fc, size, cs); in fuse_notify()
1811 return fuse_notify_inval_entry(fc, size, cs); in fuse_notify()
1814 return fuse_notify_store(fc, size, cs); in fuse_notify()
1817 return fuse_notify_retrieve(fc, size, cs); in fuse_notify()
1820 return fuse_notify_delete(fc, size, cs); in fuse_notify()
1823 fuse_copy_finish(cs); in fuse_notify()
1824 return -EINVAL; in fuse_notify()
1833 list_for_each_entry(req, &fpq->processing, list) { in request_find()
1834 if (req->in.h.unique == unique || req->intr_unique == unique) in request_find()
1840 static int copy_out_args(struct fuse_copy_state *cs, struct fuse_out *out, in copy_out_args() argument
1845 if (out->h.error) in copy_out_args()
1846 return nbytes != reqsize ? -EINVAL : 0; in copy_out_args()
1848 reqsize += len_args(out->numargs, out->args); in copy_out_args()
1850 if (reqsize < nbytes || (reqsize > nbytes && !out->argvar)) in copy_out_args()
1851 return -EINVAL; in copy_out_args()
1853 struct fuse_arg *lastarg = &out->args[out->numargs-1]; in copy_out_args()
1854 unsigned diffsize = reqsize - nbytes; in copy_out_args()
1855 if (diffsize > lastarg->size) in copy_out_args()
1856 return -EINVAL; in copy_out_args()
1857 lastarg->size -= diffsize; in copy_out_args()
1859 return fuse_copy_args(cs, out->numargs, out->argpages, out->args, in copy_out_args()
1860 out->page_zeroing); in copy_out_args()
1871 struct fuse_copy_state *cs, size_t nbytes) in fuse_dev_do_write() argument
1874 struct fuse_conn *fc = fud->fc; in fuse_dev_do_write()
1875 struct fuse_pqueue *fpq = &fud->pq; in fuse_dev_do_write()
1880 return -EINVAL; in fuse_dev_do_write()
1882 err = fuse_copy_one(cs, &oh, sizeof(oh)); in fuse_dev_do_write()
1886 err = -EINVAL; in fuse_dev_do_write()
1895 err = fuse_notify(fc, oh.error, nbytes - sizeof(oh), cs); in fuse_dev_do_write()
1899 err = -EINVAL; in fuse_dev_do_write()
1900 if (oh.error <= -1000 || oh.error > 0) in fuse_dev_do_write()
1903 spin_lock(&fpq->lock); in fuse_dev_do_write()
1904 err = -ENOENT; in fuse_dev_do_write()
1905 if (!fpq->connected) in fuse_dev_do_write()
1913 if (req->intr_unique == oh.unique) { in fuse_dev_do_write()
1915 spin_unlock(&fpq->lock); in fuse_dev_do_write()
1917 err = -EINVAL; in fuse_dev_do_write()
1923 if (oh.error == -ENOSYS) in fuse_dev_do_write()
1924 fc->no_interrupt = 1; in fuse_dev_do_write()
1925 else if (oh.error == -EAGAIN) in fuse_dev_do_write()
1926 queue_interrupt(&fc->iq, req); in fuse_dev_do_write()
1929 fuse_copy_finish(cs); in fuse_dev_do_write()
1933 clear_bit(FR_SENT, &req->flags); in fuse_dev_do_write()
1934 list_move(&req->list, &fpq->io); in fuse_dev_do_write()
1935 req->out.h = oh; in fuse_dev_do_write()
1936 set_bit(FR_LOCKED, &req->flags); in fuse_dev_do_write()
1937 spin_unlock(&fpq->lock); in fuse_dev_do_write()
1938 cs->req = req; in fuse_dev_do_write()
1939 if (!req->out.page_replace) in fuse_dev_do_write()
1940 cs->move_pages = 0; in fuse_dev_do_write()
1942 err = copy_out_args(cs, &req->out, nbytes); in fuse_dev_do_write()
1943 fuse_copy_finish(cs); in fuse_dev_do_write()
1945 spin_lock(&fpq->lock); in fuse_dev_do_write()
1946 clear_bit(FR_LOCKED, &req->flags); in fuse_dev_do_write()
1947 if (!fpq->connected) in fuse_dev_do_write()
1948 err = -ENOENT; in fuse_dev_do_write()
1950 req->out.h.error = -EIO; in fuse_dev_do_write()
1951 if (!test_bit(FR_PRIVATE, &req->flags)) in fuse_dev_do_write()
1952 list_del_init(&req->list); in fuse_dev_do_write()
1953 spin_unlock(&fpq->lock); in fuse_dev_do_write()
1960 spin_unlock(&fpq->lock); in fuse_dev_do_write()
1962 fuse_copy_finish(cs); in fuse_dev_do_write()
1968 struct fuse_copy_state cs; in fuse_dev_write() local
1969 struct fuse_dev *fud = fuse_get_dev(iocb->ki_filp); in fuse_dev_write()
1972 return -EPERM; in fuse_dev_write()
1975 return -EINVAL; in fuse_dev_write()
1977 fuse_copy_init(&cs, 0, from); in fuse_dev_write()
1979 return fuse_dev_do_write(fud, &cs, iov_iter_count(from)); in fuse_dev_write()
1989 struct fuse_copy_state cs; in fuse_dev_splice_write() local
1996 return -EPERM; in fuse_dev_splice_write()
2000 bufs = kvmalloc_array(pipe->nrbufs, sizeof(struct pipe_buffer), in fuse_dev_splice_write()
2004 return -ENOMEM; in fuse_dev_splice_write()
2009 for (idx = 0; idx < pipe->nrbufs && rem < len; idx++) in fuse_dev_splice_write()
2010 rem += pipe->bufs[(pipe->curbuf + idx) & (pipe->buffers - 1)].len; in fuse_dev_splice_write()
2012 ret = -EINVAL; in fuse_dev_splice_write()
2021 BUG_ON(nbuf >= pipe->buffers); in fuse_dev_splice_write()
2022 BUG_ON(!pipe->nrbufs); in fuse_dev_splice_write()
2023 ibuf = &pipe->bufs[pipe->curbuf]; in fuse_dev_splice_write()
2026 if (rem >= ibuf->len) { in fuse_dev_splice_write()
2028 ibuf->ops = NULL; in fuse_dev_splice_write()
2029 pipe->curbuf = (pipe->curbuf + 1) & (pipe->buffers - 1); in fuse_dev_splice_write()
2030 pipe->nrbufs--; in fuse_dev_splice_write()
2036 obuf->flags &= ~PIPE_BUF_FLAG_GIFT; in fuse_dev_splice_write()
2037 obuf->len = rem; in fuse_dev_splice_write()
2038 ibuf->offset += obuf->len; in fuse_dev_splice_write()
2039 ibuf->len -= obuf->len; in fuse_dev_splice_write()
2042 rem -= obuf->len; in fuse_dev_splice_write()
2046 fuse_copy_init(&cs, 0, NULL); in fuse_dev_splice_write()
2047 cs.pipebufs = bufs; in fuse_dev_splice_write()
2048 cs.nr_segs = nbuf; in fuse_dev_splice_write()
2049 cs.pipe = pipe; in fuse_dev_splice_write()
2052 cs.move_pages = 1; in fuse_dev_splice_write()
2054 ret = fuse_dev_do_write(fud, &cs, len); in fuse_dev_splice_write()
2075 fiq = &fud->fc->iq; in fuse_dev_poll()
2076 poll_wait(file, &fiq->waitq, wait); in fuse_dev_poll()
2078 spin_lock(&fiq->lock); in fuse_dev_poll()
2079 if (!fiq->connected) in fuse_dev_poll()
2083 spin_unlock(&fiq->lock); in fuse_dev_poll()
2091 * This function releases and reacquires fc->lock
2097 req = list_entry(head->next, struct fuse_req, list); in end_requests()
2098 req->out.h.error = -ECONNABORTED; in end_requests()
2099 clear_bit(FR_SENT, &req->flags); in end_requests()
2100 list_del_init(&req->list); in end_requests()
2109 p = rb_first(&fc->polled_files); in end_polls()
2114 wake_up_interruptible_all(&ff->poll_wait); in end_polls()
2140 struct fuse_iqueue *fiq = &fc->iq; in fuse_abort_conn()
2142 spin_lock(&fc->lock); in fuse_abort_conn()
2143 if (fc->connected) { in fuse_abort_conn()
2148 fc->connected = 0; in fuse_abort_conn()
2149 fc->blocked = 0; in fuse_abort_conn()
2150 fc->aborted = is_abort; in fuse_abort_conn()
2152 list_for_each_entry(fud, &fc->devices, entry) { in fuse_abort_conn()
2153 struct fuse_pqueue *fpq = &fud->pq; in fuse_abort_conn()
2155 spin_lock(&fpq->lock); in fuse_abort_conn()
2156 fpq->connected = 0; in fuse_abort_conn()
2157 list_for_each_entry_safe(req, next, &fpq->io, list) { in fuse_abort_conn()
2158 req->out.h.error = -ECONNABORTED; in fuse_abort_conn()
2159 spin_lock(&req->waitq.lock); in fuse_abort_conn()
2160 set_bit(FR_ABORTED, &req->flags); in fuse_abort_conn()
2161 if (!test_bit(FR_LOCKED, &req->flags)) { in fuse_abort_conn()
2162 set_bit(FR_PRIVATE, &req->flags); in fuse_abort_conn()
2164 list_move(&req->list, &to_end); in fuse_abort_conn()
2166 spin_unlock(&req->waitq.lock); in fuse_abort_conn()
2168 list_splice_tail_init(&fpq->processing, &to_end); in fuse_abort_conn()
2169 spin_unlock(&fpq->lock); in fuse_abort_conn()
2171 fc->max_background = UINT_MAX; in fuse_abort_conn()
2174 spin_lock(&fiq->lock); in fuse_abort_conn()
2175 fiq->connected = 0; in fuse_abort_conn()
2176 list_for_each_entry(req, &fiq->pending, list) in fuse_abort_conn()
2177 clear_bit(FR_PENDING, &req->flags); in fuse_abort_conn()
2178 list_splice_tail_init(&fiq->pending, &to_end); in fuse_abort_conn()
2181 wake_up_all(&fiq->waitq); in fuse_abort_conn()
2182 spin_unlock(&fiq->lock); in fuse_abort_conn()
2183 kill_fasync(&fiq->fasync, SIGIO, POLL_IN); in fuse_abort_conn()
2185 wake_up_all(&fc->blocked_waitq); in fuse_abort_conn()
2186 spin_unlock(&fc->lock); in fuse_abort_conn()
2190 spin_unlock(&fc->lock); in fuse_abort_conn()
2199 wait_event(fc->blocked_waitq, atomic_read(&fc->num_waiting) == 0); in fuse_wait_aborted()
2207 struct fuse_conn *fc = fud->fc; in fuse_dev_release()
2208 struct fuse_pqueue *fpq = &fud->pq; in fuse_dev_release()
2211 spin_lock(&fpq->lock); in fuse_dev_release()
2212 WARN_ON(!list_empty(&fpq->io)); in fuse_dev_release()
2213 list_splice_init(&fpq->processing, &to_end); in fuse_dev_release()
2214 spin_unlock(&fpq->lock); in fuse_dev_release()
2219 if (atomic_dec_and_test(&fc->dev_count)) { in fuse_dev_release()
2220 WARN_ON(fc->iq.fasync != NULL); in fuse_dev_release()
2234 return -EPERM; in fuse_dev_fasync()
2236 /* No locking - fasync_helper does its own locking */ in fuse_dev_fasync()
2237 return fasync_helper(fd, file, on, &fud->fc->iq.fasync); in fuse_dev_fasync()
2244 if (new->private_data) in fuse_device_clone()
2245 return -EINVAL; in fuse_device_clone()
2249 return -ENOMEM; in fuse_device_clone()
2251 new->private_data = fud; in fuse_device_clone()
2252 atomic_inc(&fc->dev_count); in fuse_device_clone()
2260 int err = -ENOTTY; in fuse_dev_ioctl()
2265 err = -EFAULT; in fuse_dev_ioctl()
2269 err = -EINVAL; in fuse_dev_ioctl()
2274 * Check against file->f_op because CUSE in fuse_dev_ioctl()
2277 if (old->f_op == file->f_op && in fuse_dev_ioctl()
2278 old->f_cred->user_ns == file->f_cred->user_ns) in fuse_dev_ioctl()
2283 err = fuse_device_clone(fud->fc, file); in fuse_dev_ioctl()
2317 int err = -ENOMEM; in fuse_dev_init()