Lines Matching +full:fiq +full:- +full:device
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()
195 u64 fuse_get_unique(struct fuse_iqueue *fiq) in fuse_get_unique() argument
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
210 static void fuse_dev_wake_and_unlock(struct fuse_iqueue *fiq) in fuse_dev_wake_and_unlock() argument
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()
225 static void queue_request_and_unlock(struct fuse_iqueue *fiq, in queue_request_and_unlock() argument
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() local
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() local
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()
268 queue_request_and_unlock(fiq, req); in flush_bg_queue()
275 * occurred during communication with userspace, or the device file
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() local
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 fc->num_background--; in fuse_request_end()
319 fc->active_background--; in fuse_request_end()
321 spin_unlock(&fc->bg_lock); in fuse_request_end()
324 wake_up(&req->waitq); in fuse_request_end()
327 if (test_bit(FR_ASYNC, &req->flags)) in fuse_request_end()
328 req->args->end(fm, req->args, req->out.h.error); in fuse_request_end()
336 struct fuse_iqueue *fiq = &req->fm->fc->iq; in queue_interrupt() local
338 spin_lock(&fiq->lock); in queue_interrupt()
340 if (unlikely(!test_bit(FR_INTERRUPTED, &req->flags))) { in queue_interrupt()
341 spin_unlock(&fiq->lock); in queue_interrupt()
342 return -EINVAL; in queue_interrupt()
345 if (list_empty(&req->intr_entry)) { in queue_interrupt()
346 list_add_tail(&req->intr_entry, &fiq->interrupts); in queue_interrupt()
352 if (test_bit(FR_FINISHED, &req->flags)) { in queue_interrupt()
353 list_del_init(&req->intr_entry); in queue_interrupt()
354 spin_unlock(&fiq->lock); in queue_interrupt()
357 fiq->ops->wake_interrupt_and_unlock(fiq); in queue_interrupt()
359 spin_unlock(&fiq->lock); in queue_interrupt()
366 struct fuse_conn *fc = req->fm->fc; in request_wait_answer()
367 struct fuse_iqueue *fiq = &fc->iq; in request_wait_answer() local
370 if (!fc->no_interrupt) { in request_wait_answer()
372 err = wait_event_interruptible(req->waitq, in request_wait_answer()
373 test_bit(FR_FINISHED, &req->flags)); in request_wait_answer()
377 set_bit(FR_INTERRUPTED, &req->flags); in request_wait_answer()
380 if (test_bit(FR_SENT, &req->flags)) in request_wait_answer()
384 if (!test_bit(FR_FORCE, &req->flags)) { in request_wait_answer()
386 err = wait_event_killable(req->waitq, in request_wait_answer()
387 test_bit(FR_FINISHED, &req->flags)); in request_wait_answer()
391 spin_lock(&fiq->lock); in request_wait_answer()
393 if (test_bit(FR_PENDING, &req->flags)) { in request_wait_answer()
394 list_del(&req->list); in request_wait_answer()
395 spin_unlock(&fiq->lock); in request_wait_answer()
397 req->out.h.error = -EINTR; in request_wait_answer()
400 spin_unlock(&fiq->lock); in request_wait_answer()
407 wait_event(req->waitq, test_bit(FR_FINISHED, &req->flags)); in request_wait_answer()
412 struct fuse_iqueue *fiq = &req->fm->fc->iq; in __fuse_request_send() local
414 BUG_ON(test_bit(FR_BACKGROUND, &req->flags)); in __fuse_request_send()
415 spin_lock(&fiq->lock); in __fuse_request_send()
416 if (!fiq->connected) { in __fuse_request_send()
417 spin_unlock(&fiq->lock); in __fuse_request_send()
418 req->out.h.error = -ENOTCONN; in __fuse_request_send()
420 req->in.h.unique = fuse_get_unique(fiq); in __fuse_request_send()
424 queue_request_and_unlock(fiq, req); in __fuse_request_send()
434 if (fc->minor < 4 && args->opcode == FUSE_STATFS) in fuse_adjust_compat()
435 args->out_args[0].size = FUSE_COMPAT_STATFS_SIZE; in fuse_adjust_compat()
437 if (fc->minor < 9) { in fuse_adjust_compat()
438 switch (args->opcode) { in fuse_adjust_compat()
445 args->out_args[0].size = FUSE_COMPAT_ENTRY_OUT_SIZE; in fuse_adjust_compat()
449 args->out_args[0].size = FUSE_COMPAT_ATTR_OUT_SIZE; in fuse_adjust_compat()
453 if (fc->minor < 12) { in fuse_adjust_compat()
454 switch (args->opcode) { in fuse_adjust_compat()
456 args->in_args[0].size = sizeof(struct fuse_open_in); in fuse_adjust_compat()
459 args->in_args[0].size = FUSE_COMPAT_MKNOD_IN_SIZE; in fuse_adjust_compat()
467 struct fuse_conn *fc = req->fm->fc; in fuse_force_creds()
469 req->in.h.uid = from_kuid_munged(fc->user_ns, current_fsuid()); in fuse_force_creds()
470 req->in.h.gid = from_kgid_munged(fc->user_ns, current_fsgid()); in fuse_force_creds()
471 req->in.h.pid = pid_nr_ns(task_pid(current), fc->pid_ns); in fuse_force_creds()
476 req->in.h.opcode = args->opcode; in fuse_args_to_req()
477 req->in.h.nodeid = args->nodeid; in fuse_args_to_req()
478 req->args = args; in fuse_args_to_req()
479 if (args->is_ext) in fuse_args_to_req()
480 req->in.h.total_extlen = args->in_args[args->ext_idx].size / 8; in fuse_args_to_req()
481 if (args->end) in fuse_args_to_req()
482 __set_bit(FR_ASYNC, &req->flags); in fuse_args_to_req()
487 struct fuse_conn *fc = fm->fc; in fuse_simple_request()
491 if (args->force) { in fuse_simple_request()
492 atomic_inc(&fc->num_waiting); in fuse_simple_request()
495 if (!args->nocreds) in fuse_simple_request()
498 __set_bit(FR_WAITING, &req->flags); in fuse_simple_request()
499 __set_bit(FR_FORCE, &req->flags); in fuse_simple_request()
501 WARN_ON(args->nocreds); in fuse_simple_request()
507 /* Needs to be done after fuse_get_req() so that fc->minor is valid */ in fuse_simple_request()
511 if (!args->noreply) in fuse_simple_request()
512 __set_bit(FR_ISREPLY, &req->flags); in fuse_simple_request()
514 ret = req->out.h.error; in fuse_simple_request()
515 if (!ret && args->out_argvar) { in fuse_simple_request()
516 BUG_ON(args->out_numargs == 0); in fuse_simple_request()
517 ret = args->out_args[args->out_numargs - 1].size; in fuse_simple_request()
526 struct fuse_mount *fm = req->fm; in fuse_request_queue_background()
527 struct fuse_conn *fc = fm->fc; in fuse_request_queue_background()
530 WARN_ON(!test_bit(FR_BACKGROUND, &req->flags)); in fuse_request_queue_background()
531 if (!test_bit(FR_WAITING, &req->flags)) { in fuse_request_queue_background()
532 __set_bit(FR_WAITING, &req->flags); in fuse_request_queue_background()
533 atomic_inc(&fc->num_waiting); in fuse_request_queue_background()
535 __set_bit(FR_ISREPLY, &req->flags); in fuse_request_queue_background()
536 spin_lock(&fc->bg_lock); in fuse_request_queue_background()
537 if (likely(fc->connected)) { in fuse_request_queue_background()
538 fc->num_background++; in fuse_request_queue_background()
539 if (fc->num_background == fc->max_background) in fuse_request_queue_background()
540 fc->blocked = 1; in fuse_request_queue_background()
541 list_add_tail(&req->list, &fc->bg_queue); in fuse_request_queue_background()
545 spin_unlock(&fc->bg_lock); in fuse_request_queue_background()
555 if (args->force) { in fuse_simple_background()
556 WARN_ON(!args->nocreds); in fuse_simple_background()
559 return -ENOMEM; in fuse_simple_background()
560 __set_bit(FR_BACKGROUND, &req->flags); in fuse_simple_background()
562 WARN_ON(args->nocreds); in fuse_simple_background()
572 return -ENOTCONN; in fuse_simple_background()
583 struct fuse_iqueue *fiq = &fm->fc->iq; in fuse_simple_notify_reply() local
590 __clear_bit(FR_ISREPLY, &req->flags); in fuse_simple_notify_reply()
591 req->in.h.unique = unique; in fuse_simple_notify_reply()
595 spin_lock(&fiq->lock); in fuse_simple_notify_reply()
596 if (fiq->connected) { in fuse_simple_notify_reply()
597 queue_request_and_unlock(fiq, req); in fuse_simple_notify_reply()
599 err = -ENODEV; in fuse_simple_notify_reply()
600 spin_unlock(&fiq->lock); in fuse_simple_notify_reply()
609 * anything that could cause a page-fault. If the request was already
616 spin_lock(&req->waitq.lock); in lock_request()
617 if (test_bit(FR_ABORTED, &req->flags)) in lock_request()
618 err = -ENOENT; in lock_request()
620 set_bit(FR_LOCKED, &req->flags); in lock_request()
621 spin_unlock(&req->waitq.lock); in lock_request()
634 spin_lock(&req->waitq.lock); in unlock_request()
635 if (test_bit(FR_ABORTED, &req->flags)) in unlock_request()
636 err = -ENOENT; in unlock_request()
638 clear_bit(FR_LOCKED, &req->flags); in unlock_request()
639 spin_unlock(&req->waitq.lock); in unlock_request()
662 cs->write = write; in fuse_copy_init()
663 cs->iter = iter; in fuse_copy_init()
669 if (cs->currbuf) { in fuse_copy_finish()
670 struct pipe_buffer *buf = cs->currbuf; in fuse_copy_finish()
672 if (cs->write) in fuse_copy_finish()
673 buf->len = PAGE_SIZE - cs->len; in fuse_copy_finish()
674 cs->currbuf = NULL; in fuse_copy_finish()
675 } else if (cs->pg) { in fuse_copy_finish()
676 if (cs->write) { in fuse_copy_finish()
677 flush_dcache_page(cs->pg); in fuse_copy_finish()
678 set_page_dirty_lock(cs->pg); in fuse_copy_finish()
680 put_page(cs->pg); in fuse_copy_finish()
682 cs->pg = NULL; in fuse_copy_finish()
694 err = unlock_request(cs->req); in fuse_copy_fill()
699 if (cs->pipebufs) { in fuse_copy_fill()
700 struct pipe_buffer *buf = cs->pipebufs; in fuse_copy_fill()
702 if (!cs->write) { in fuse_copy_fill()
703 err = pipe_buf_confirm(cs->pipe, buf); in fuse_copy_fill()
707 BUG_ON(!cs->nr_segs); in fuse_copy_fill()
708 cs->currbuf = buf; in fuse_copy_fill()
709 cs->pg = buf->page; in fuse_copy_fill()
710 cs->offset = buf->offset; in fuse_copy_fill()
711 cs->len = buf->len; in fuse_copy_fill()
712 cs->pipebufs++; in fuse_copy_fill()
713 cs->nr_segs--; in fuse_copy_fill()
715 if (cs->nr_segs >= cs->pipe->max_usage) in fuse_copy_fill()
716 return -EIO; in fuse_copy_fill()
720 return -ENOMEM; in fuse_copy_fill()
722 buf->page = page; in fuse_copy_fill()
723 buf->offset = 0; in fuse_copy_fill()
724 buf->len = 0; in fuse_copy_fill()
726 cs->currbuf = buf; in fuse_copy_fill()
727 cs->pg = page; in fuse_copy_fill()
728 cs->offset = 0; in fuse_copy_fill()
729 cs->len = PAGE_SIZE; in fuse_copy_fill()
730 cs->pipebufs++; in fuse_copy_fill()
731 cs->nr_segs++; in fuse_copy_fill()
735 err = iov_iter_get_pages2(cs->iter, &page, PAGE_SIZE, 1, &off); in fuse_copy_fill()
739 cs->len = err; in fuse_copy_fill()
740 cs->offset = off; in fuse_copy_fill()
741 cs->pg = page; in fuse_copy_fill()
744 return lock_request(cs->req); in fuse_copy_fill()
750 unsigned ncpy = min(*size, cs->len); in fuse_copy_do()
752 void *pgaddr = kmap_local_page(cs->pg); in fuse_copy_do()
753 void *buf = pgaddr + cs->offset; in fuse_copy_do()
755 if (cs->write) in fuse_copy_do()
763 *size -= ncpy; in fuse_copy_do()
764 cs->len -= ncpy; in fuse_copy_do()
765 cs->offset += ncpy; in fuse_copy_do()
772 folio->mapping != NULL || in fuse_check_folio()
773 (folio->flags & PAGE_FLAGS_CHECK_AT_PREP & in fuse_check_folio()
783 dump_page(&folio->page, "fuse: trying to steal weird page"); in fuse_check_folio()
794 struct pipe_buffer *buf = cs->pipebufs; in fuse_try_move_page()
797 err = unlock_request(cs->req); in fuse_try_move_page()
803 err = pipe_buf_confirm(cs->pipe, buf); in fuse_try_move_page()
807 BUG_ON(!cs->nr_segs); in fuse_try_move_page()
808 cs->currbuf = buf; in fuse_try_move_page()
809 cs->len = buf->len; in fuse_try_move_page()
810 cs->pipebufs++; in fuse_try_move_page()
811 cs->nr_segs--; in fuse_try_move_page()
813 if (cs->len != PAGE_SIZE) in fuse_try_move_page()
816 if (!pipe_buf_try_steal(cs->pipe, buf)) in fuse_try_move_page()
819 newfolio = page_folio(buf->page); in fuse_try_move_page()
847 if (!(buf->flags & PIPE_BUF_FLAG_LRU)) in fuse_try_move_page()
854 pipe_buf_release(cs->pipe, buf); in fuse_try_move_page()
857 spin_lock(&cs->req->waitq.lock); in fuse_try_move_page()
858 if (test_bit(FR_ABORTED, &cs->req->flags)) in fuse_try_move_page()
859 err = -ENOENT; in fuse_try_move_page()
861 *pagep = &newfolio->page; in fuse_try_move_page()
862 spin_unlock(&cs->req->waitq.lock); in fuse_try_move_page()
871 /* Drop ref for ap->pages[] array */ in fuse_try_move_page()
873 cs->len = 0; in fuse_try_move_page()
884 cs->pg = buf->page; in fuse_try_move_page()
885 cs->offset = buf->offset; in fuse_try_move_page()
887 err = lock_request(cs->req); in fuse_try_move_page()
900 if (cs->nr_segs >= cs->pipe->max_usage) in fuse_ref_page()
901 return -EIO; in fuse_ref_page()
904 err = unlock_request(cs->req); in fuse_ref_page()
912 buf = cs->pipebufs; in fuse_ref_page()
913 buf->page = page; in fuse_ref_page()
914 buf->offset = offset; in fuse_ref_page()
915 buf->len = count; in fuse_ref_page()
917 cs->pipebufs++; in fuse_ref_page()
918 cs->nr_segs++; in fuse_ref_page()
919 cs->len = 0; in fuse_ref_page()
938 if (cs->write && cs->pipebufs && page) { in fuse_copy_page()
943 if (cs->req->args->user_pages) { in fuse_copy_page()
950 } else if (!cs->len) { in fuse_copy_page()
951 if (cs->move_pages && page && in fuse_copy_page()
970 if (page && !cs->write) in fuse_copy_page()
980 struct fuse_req *req = cs->req; in fuse_copy_pages()
981 struct fuse_args_pages *ap = container_of(req->args, typeof(*ap), args); in fuse_copy_pages()
984 for (i = 0; i < ap->num_pages && (nbytes || zeroing); i++) { in fuse_copy_pages()
986 unsigned int offset = ap->descs[i].offset; in fuse_copy_pages()
987 unsigned int count = min(nbytes, ap->descs[i].length); in fuse_copy_pages()
989 err = fuse_copy_page(cs, &ap->pages[i], offset, count, zeroing); in fuse_copy_pages()
993 nbytes -= count; in fuse_copy_pages()
1002 if (!cs->len) { in fuse_copy_one()
1022 if (i == numargs - 1 && argpages) in fuse_copy_args()
1023 err = fuse_copy_pages(cs, arg->size, zeroing); in fuse_copy_args()
1025 err = fuse_copy_one(cs, arg->value, arg->size); in fuse_copy_args()
1030 static int forget_pending(struct fuse_iqueue *fiq) in forget_pending() argument
1032 return fiq->forget_list_head.next != NULL; in forget_pending()
1035 static int request_pending(struct fuse_iqueue *fiq) in request_pending() argument
1037 return !list_empty(&fiq->pending) || !list_empty(&fiq->interrupts) || in request_pending()
1038 forget_pending(fiq); in request_pending()
1047 * Called with fiq->lock held, releases it
1049 static int fuse_read_interrupt(struct fuse_iqueue *fiq, in fuse_read_interrupt() argument
1052 __releases(fiq->lock) in fuse_read_interrupt()
1059 list_del_init(&req->intr_entry); in fuse_read_interrupt()
1064 ih.unique = (req->in.h.unique | FUSE_INT_REQ_BIT); in fuse_read_interrupt()
1065 arg.unique = req->in.h.unique; in fuse_read_interrupt()
1067 spin_unlock(&fiq->lock); in fuse_read_interrupt()
1069 return -EINVAL; in fuse_read_interrupt()
1079 struct fuse_forget_link *fuse_dequeue_forget(struct fuse_iqueue *fiq, in fuse_dequeue_forget() argument
1083 struct fuse_forget_link *head = fiq->forget_list_head.next; in fuse_dequeue_forget()
1088 newhead = &(*newhead)->next; in fuse_dequeue_forget()
1090 fiq->forget_list_head.next = *newhead; in fuse_dequeue_forget()
1092 if (fiq->forget_list_head.next == NULL) in fuse_dequeue_forget()
1093 fiq->forget_list_tail = &fiq->forget_list_head; in fuse_dequeue_forget()
1102 static int fuse_read_single_forget(struct fuse_iqueue *fiq, in fuse_read_single_forget() argument
1105 __releases(fiq->lock) in fuse_read_single_forget()
1108 struct fuse_forget_link *forget = fuse_dequeue_forget(fiq, 1, NULL); in fuse_read_single_forget()
1110 .nlookup = forget->forget_one.nlookup, in fuse_read_single_forget()
1114 .nodeid = forget->forget_one.nodeid, in fuse_read_single_forget()
1115 .unique = fuse_get_unique(fiq), in fuse_read_single_forget()
1119 spin_unlock(&fiq->lock); in fuse_read_single_forget()
1122 return -EINVAL; in fuse_read_single_forget()
1135 static int fuse_read_batch_forget(struct fuse_iqueue *fiq, in fuse_read_batch_forget() argument
1137 __releases(fiq->lock) in fuse_read_batch_forget()
1146 .unique = fuse_get_unique(fiq), in fuse_read_batch_forget()
1151 spin_unlock(&fiq->lock); in fuse_read_batch_forget()
1152 return -EINVAL; in fuse_read_batch_forget()
1155 max_forgets = (nbytes - ih.len) / sizeof(struct fuse_forget_one); in fuse_read_batch_forget()
1156 head = fuse_dequeue_forget(fiq, max_forgets, &count); in fuse_read_batch_forget()
1157 spin_unlock(&fiq->lock); in fuse_read_batch_forget()
1169 err = fuse_copy_one(cs, &forget->forget_one, in fuse_read_batch_forget()
1170 sizeof(forget->forget_one)); in fuse_read_batch_forget()
1172 head = forget->next; in fuse_read_batch_forget()
1184 static int fuse_read_forget(struct fuse_conn *fc, struct fuse_iqueue *fiq, in fuse_read_forget() argument
1187 __releases(fiq->lock) in fuse_read_forget()
1189 if (fc->minor < 16 || fiq->forget_list_head.next->next == NULL) in fuse_read_forget()
1190 return fuse_read_single_forget(fiq, cs, nbytes); in fuse_read_forget()
1192 return fuse_read_batch_forget(fiq, cs, nbytes); in fuse_read_forget()
1208 struct fuse_conn *fc = fud->fc; in fuse_dev_do_read()
1209 struct fuse_iqueue *fiq = &fc->iq; in fuse_dev_do_read() local
1210 struct fuse_pqueue *fpq = &fud->pq; in fuse_dev_do_read()
1217 * Require sane minimum read buffer - that has capacity for fixed part in fuse_dev_do_read()
1231 fc->max_write)) in fuse_dev_do_read()
1232 return -EINVAL; in fuse_dev_do_read()
1236 spin_lock(&fiq->lock); in fuse_dev_do_read()
1237 if (!fiq->connected || request_pending(fiq)) in fuse_dev_do_read()
1239 spin_unlock(&fiq->lock); in fuse_dev_do_read()
1241 if (file->f_flags & O_NONBLOCK) in fuse_dev_do_read()
1242 return -EAGAIN; in fuse_dev_do_read()
1243 err = wait_event_interruptible_exclusive(fiq->waitq, in fuse_dev_do_read()
1244 !fiq->connected || request_pending(fiq)); in fuse_dev_do_read()
1249 if (!fiq->connected) { in fuse_dev_do_read()
1250 err = fc->aborted ? -ECONNABORTED : -ENODEV; in fuse_dev_do_read()
1254 if (!list_empty(&fiq->interrupts)) { in fuse_dev_do_read()
1255 req = list_entry(fiq->interrupts.next, struct fuse_req, in fuse_dev_do_read()
1257 return fuse_read_interrupt(fiq, cs, nbytes, req); in fuse_dev_do_read()
1260 if (forget_pending(fiq)) { in fuse_dev_do_read()
1261 if (list_empty(&fiq->pending) || fiq->forget_batch-- > 0) in fuse_dev_do_read()
1262 return fuse_read_forget(fc, fiq, cs, nbytes); in fuse_dev_do_read()
1264 if (fiq->forget_batch <= -8) in fuse_dev_do_read()
1265 fiq->forget_batch = 16; in fuse_dev_do_read()
1268 req = list_entry(fiq->pending.next, struct fuse_req, list); in fuse_dev_do_read()
1269 clear_bit(FR_PENDING, &req->flags); in fuse_dev_do_read()
1270 list_del_init(&req->list); in fuse_dev_do_read()
1271 spin_unlock(&fiq->lock); in fuse_dev_do_read()
1273 args = req->args; in fuse_dev_do_read()
1274 reqsize = req->in.h.len; in fuse_dev_do_read()
1278 req->out.h.error = -EIO; in fuse_dev_do_read()
1280 if (args->opcode == FUSE_SETXATTR) in fuse_dev_do_read()
1281 req->out.h.error = -E2BIG; in fuse_dev_do_read()
1285 spin_lock(&fpq->lock); in fuse_dev_do_read()
1287 * Must not put request on fpq->io queue after having been shut down by in fuse_dev_do_read()
1290 if (!fpq->connected) { in fuse_dev_do_read()
1291 req->out.h.error = err = -ECONNABORTED; in fuse_dev_do_read()
1295 list_add(&req->list, &fpq->io); in fuse_dev_do_read()
1296 spin_unlock(&fpq->lock); in fuse_dev_do_read()
1297 cs->req = req; in fuse_dev_do_read()
1298 err = fuse_copy_one(cs, &req->in.h, sizeof(req->in.h)); in fuse_dev_do_read()
1300 err = fuse_copy_args(cs, args->in_numargs, args->in_pages, in fuse_dev_do_read()
1301 (struct fuse_arg *) args->in_args, 0); in fuse_dev_do_read()
1303 spin_lock(&fpq->lock); in fuse_dev_do_read()
1304 clear_bit(FR_LOCKED, &req->flags); in fuse_dev_do_read()
1305 if (!fpq->connected) { in fuse_dev_do_read()
1306 err = fc->aborted ? -ECONNABORTED : -ENODEV; in fuse_dev_do_read()
1310 req->out.h.error = -EIO; in fuse_dev_do_read()
1313 if (!test_bit(FR_ISREPLY, &req->flags)) { in fuse_dev_do_read()
1317 hash = fuse_req_hash(req->in.h.unique); in fuse_dev_do_read()
1318 list_move_tail(&req->list, &fpq->processing[hash]); in fuse_dev_do_read()
1320 set_bit(FR_SENT, &req->flags); in fuse_dev_do_read()
1321 spin_unlock(&fpq->lock); in fuse_dev_do_read()
1324 if (test_bit(FR_INTERRUPTED, &req->flags)) in fuse_dev_do_read()
1331 if (!test_bit(FR_PRIVATE, &req->flags)) in fuse_dev_do_read()
1332 list_del_init(&req->list); in fuse_dev_do_read()
1333 spin_unlock(&fpq->lock); in fuse_dev_do_read()
1338 spin_unlock(&fiq->lock); in fuse_dev_do_read()
1345 * The fuse device's file's private_data is used to hold in fuse_dev_open()
1349 file->private_data = NULL; in fuse_dev_open()
1356 struct file *file = iocb->ki_filp; in fuse_dev_read()
1360 return -EPERM; in fuse_dev_read()
1363 return -EINVAL; in fuse_dev_read()
1381 return -EPERM; in fuse_dev_splice_read()
1383 bufs = kvmalloc_array(pipe->max_usage, sizeof(struct pipe_buffer), in fuse_dev_splice_read()
1386 return -ENOMEM; in fuse_dev_splice_read()
1395 if (pipe_occupancy(pipe->head, pipe->tail) + cs.nr_segs > pipe->max_usage) { in fuse_dev_splice_read()
1396 ret = -EIO; in fuse_dev_splice_read()
1402 * Need to be careful about this. Having buf->ops in module in fuse_dev_splice_read()
1425 int err = -EINVAL; in fuse_notify_poll()
1446 int err = -EINVAL; in fuse_notify_inval_inode()
1456 down_read(&fc->killsb); in fuse_notify_inval_inode()
1459 up_read(&fc->killsb); in fuse_notify_inval_inode()
1471 int err = -ENOMEM; in fuse_notify_inval_entry()
1479 err = -EINVAL; in fuse_notify_inval_entry()
1487 err = -ENAMETOOLONG; in fuse_notify_inval_entry()
1491 err = -EINVAL; in fuse_notify_inval_entry()
1503 down_read(&fc->killsb); in fuse_notify_inval_entry()
1505 up_read(&fc->killsb); in fuse_notify_inval_entry()
1519 int err = -ENOMEM; in fuse_notify_delete()
1527 err = -EINVAL; in fuse_notify_delete()
1535 err = -ENAMETOOLONG; in fuse_notify_delete()
1539 err = -EINVAL; in fuse_notify_delete()
1551 down_read(&fc->killsb); in fuse_notify_delete()
1553 up_read(&fc->killsb); in fuse_notify_delete()
1577 err = -EINVAL; in fuse_notify_store()
1585 err = -EINVAL; in fuse_notify_store()
1586 if (size - sizeof(outarg) != outarg.size) in fuse_notify_store()
1591 down_read(&fc->killsb); in fuse_notify_store()
1593 err = -ENOENT; in fuse_notify_store()
1598 mapping = inode->i_mapping; in fuse_notify_store()
1613 err = -ENOMEM; in fuse_notify_store()
1619 this_num = min_t(unsigned, num, PAGE_SIZE - offset); in fuse_notify_store()
1630 num -= this_num; in fuse_notify_store()
1640 up_read(&fc->killsb); in fuse_notify_store()
1657 release_pages(ra->ap.pages, ra->ap.num_pages); in fuse_retrieve_end()
1665 struct address_space *mapping = inode->i_mapping; in fuse_retrieve()
1672 struct fuse_conn *fc = fm->fc; in fuse_retrieve()
1678 offset = outarg->offset & ~PAGE_MASK; in fuse_retrieve()
1681 num = min(outarg->size, fc->max_write); in fuse_retrieve()
1682 if (outarg->offset > file_size) in fuse_retrieve()
1684 else if (outarg->offset + num > file_size) in fuse_retrieve()
1685 num = file_size - outarg->offset; in fuse_retrieve()
1687 num_pages = (num + offset + PAGE_SIZE - 1) >> PAGE_SHIFT; in fuse_retrieve()
1688 num_pages = min(num_pages, fc->max_pages); in fuse_retrieve()
1690 args_size += num_pages * (sizeof(ap->pages[0]) + sizeof(ap->descs[0])); in fuse_retrieve()
1694 return -ENOMEM; in fuse_retrieve()
1696 ap = &ra->ap; in fuse_retrieve()
1697 ap->pages = (void *) (ra + 1); in fuse_retrieve()
1698 ap->descs = (void *) (ap->pages + num_pages); in fuse_retrieve()
1700 args = &ap->args; in fuse_retrieve()
1701 args->nodeid = outarg->nodeid; in fuse_retrieve()
1702 args->opcode = FUSE_NOTIFY_REPLY; in fuse_retrieve()
1703 args->in_numargs = 2; in fuse_retrieve()
1704 args->in_pages = true; in fuse_retrieve()
1705 args->end = fuse_retrieve_end; in fuse_retrieve()
1707 index = outarg->offset >> PAGE_SHIFT; in fuse_retrieve()
1709 while (num && ap->num_pages < num_pages) { in fuse_retrieve()
1717 this_num = min_t(unsigned, num, PAGE_SIZE - offset); in fuse_retrieve()
1718 ap->pages[ap->num_pages] = page; in fuse_retrieve()
1719 ap->descs[ap->num_pages].offset = offset; in fuse_retrieve()
1720 ap->descs[ap->num_pages].length = this_num; in fuse_retrieve()
1721 ap->num_pages++; in fuse_retrieve()
1724 num -= this_num; in fuse_retrieve()
1728 ra->inarg.offset = outarg->offset; in fuse_retrieve()
1729 ra->inarg.size = total_len; in fuse_retrieve()
1730 args->in_args[0].size = sizeof(ra->inarg); in fuse_retrieve()
1731 args->in_args[0].value = &ra->inarg; in fuse_retrieve()
1732 args->in_args[1].size = total_len; in fuse_retrieve()
1734 err = fuse_simple_notify_reply(fm, args, outarg->notify_unique); in fuse_retrieve()
1750 err = -EINVAL; in fuse_notify_retrieve()
1760 down_read(&fc->killsb); in fuse_notify_retrieve()
1761 err = -ENOENT; in fuse_notify_retrieve()
1769 up_read(&fc->killsb); in fuse_notify_retrieve()
1782 cs->move_pages = 0; in fuse_notify()
1805 return -EINVAL; in fuse_notify()
1815 list_for_each_entry(req, &fpq->processing[hash], list) { in request_find()
1816 if (req->in.h.unique == unique) in request_find()
1827 reqsize += fuse_len_args(args->out_numargs, args->out_args); in copy_out_args()
1829 if (reqsize < nbytes || (reqsize > nbytes && !args->out_argvar)) in copy_out_args()
1830 return -EINVAL; in copy_out_args()
1832 struct fuse_arg *lastarg = &args->out_args[args->out_numargs-1]; in copy_out_args()
1833 unsigned diffsize = reqsize - nbytes; in copy_out_args()
1835 if (diffsize > lastarg->size) in copy_out_args()
1836 return -EINVAL; in copy_out_args()
1837 lastarg->size -= diffsize; in copy_out_args()
1839 return fuse_copy_args(cs, args->out_numargs, args->out_pages, in copy_out_args()
1840 args->out_args, args->page_zeroing); in copy_out_args()
1854 struct fuse_conn *fc = fud->fc; in fuse_dev_do_write()
1855 struct fuse_pqueue *fpq = &fud->pq; in fuse_dev_do_write()
1859 err = -EINVAL; in fuse_dev_do_write()
1867 err = -EINVAL; in fuse_dev_do_write()
1876 err = fuse_notify(fc, oh.error, nbytes - sizeof(oh), cs); in fuse_dev_do_write()
1880 err = -EINVAL; in fuse_dev_do_write()
1881 if (oh.error <= -512 || oh.error > 0) in fuse_dev_do_write()
1884 spin_lock(&fpq->lock); in fuse_dev_do_write()
1886 if (fpq->connected) in fuse_dev_do_write()
1889 err = -ENOENT; in fuse_dev_do_write()
1891 spin_unlock(&fpq->lock); in fuse_dev_do_write()
1898 spin_unlock(&fpq->lock); in fuse_dev_do_write()
1902 err = -EINVAL; in fuse_dev_do_write()
1903 else if (oh.error == -ENOSYS) in fuse_dev_do_write()
1904 fc->no_interrupt = 1; in fuse_dev_do_write()
1905 else if (oh.error == -EAGAIN) in fuse_dev_do_write()
1913 clear_bit(FR_SENT, &req->flags); in fuse_dev_do_write()
1914 list_move(&req->list, &fpq->io); in fuse_dev_do_write()
1915 req->out.h = oh; in fuse_dev_do_write()
1916 set_bit(FR_LOCKED, &req->flags); in fuse_dev_do_write()
1917 spin_unlock(&fpq->lock); in fuse_dev_do_write()
1918 cs->req = req; in fuse_dev_do_write()
1919 if (!req->args->page_replace) in fuse_dev_do_write()
1920 cs->move_pages = 0; in fuse_dev_do_write()
1923 err = nbytes != sizeof(oh) ? -EINVAL : 0; in fuse_dev_do_write()
1925 err = copy_out_args(cs, req->args, nbytes); in fuse_dev_do_write()
1928 spin_lock(&fpq->lock); in fuse_dev_do_write()
1929 clear_bit(FR_LOCKED, &req->flags); in fuse_dev_do_write()
1930 if (!fpq->connected) in fuse_dev_do_write()
1931 err = -ENOENT; in fuse_dev_do_write()
1933 req->out.h.error = -EIO; in fuse_dev_do_write()
1934 if (!test_bit(FR_PRIVATE, &req->flags)) in fuse_dev_do_write()
1935 list_del_init(&req->list); in fuse_dev_do_write()
1936 spin_unlock(&fpq->lock); in fuse_dev_do_write()
1950 struct fuse_dev *fud = fuse_get_dev(iocb->ki_filp); in fuse_dev_write()
1953 return -EPERM; in fuse_dev_write()
1956 return -EINVAL; in fuse_dev_write()
1978 return -EPERM; in fuse_dev_splice_write()
1982 head = pipe->head; in fuse_dev_splice_write()
1983 tail = pipe->tail; in fuse_dev_splice_write()
1984 mask = pipe->ring_size - 1; in fuse_dev_splice_write()
1985 count = head - tail; in fuse_dev_splice_write()
1990 return -ENOMEM; in fuse_dev_splice_write()
1996 rem += pipe->bufs[idx & mask].len; in fuse_dev_splice_write()
1998 ret = -EINVAL; in fuse_dev_splice_write()
2010 ibuf = &pipe->bufs[tail & mask]; in fuse_dev_splice_write()
2013 if (rem >= ibuf->len) { in fuse_dev_splice_write()
2015 ibuf->ops = NULL; in fuse_dev_splice_write()
2017 pipe->tail = tail; in fuse_dev_splice_write()
2023 obuf->flags &= ~PIPE_BUF_FLAG_GIFT; in fuse_dev_splice_write()
2024 obuf->len = rem; in fuse_dev_splice_write()
2025 ibuf->offset += obuf->len; in fuse_dev_splice_write()
2026 ibuf->len -= obuf->len; in fuse_dev_splice_write()
2029 rem -= obuf->len; in fuse_dev_splice_write()
2048 if (buf->ops) in fuse_dev_splice_write()
2060 struct fuse_iqueue *fiq; in fuse_dev_poll() local
2066 fiq = &fud->fc->iq; in fuse_dev_poll()
2067 poll_wait(file, &fiq->waitq, wait); in fuse_dev_poll()
2069 spin_lock(&fiq->lock); in fuse_dev_poll()
2070 if (!fiq->connected) in fuse_dev_poll()
2072 else if (request_pending(fiq)) in fuse_dev_poll()
2074 spin_unlock(&fiq->lock); in fuse_dev_poll()
2084 req = list_entry(head->next, struct fuse_req, list); in end_requests()
2085 req->out.h.error = -ECONNABORTED; in end_requests()
2086 clear_bit(FR_SENT, &req->flags); in end_requests()
2087 list_del_init(&req->list); in end_requests()
2096 p = rb_first(&fc->polled_files); in end_polls()
2101 wake_up_interruptible_all(&ff->poll_wait); in end_polls()
2127 struct fuse_iqueue *fiq = &fc->iq; in fuse_abort_conn() local
2129 spin_lock(&fc->lock); in fuse_abort_conn()
2130 if (fc->connected) { in fuse_abort_conn()
2136 /* Background queuing checks fc->connected under bg_lock */ in fuse_abort_conn()
2137 spin_lock(&fc->bg_lock); in fuse_abort_conn()
2138 fc->connected = 0; in fuse_abort_conn()
2139 spin_unlock(&fc->bg_lock); in fuse_abort_conn()
2142 list_for_each_entry(fud, &fc->devices, entry) { in fuse_abort_conn()
2143 struct fuse_pqueue *fpq = &fud->pq; in fuse_abort_conn()
2145 spin_lock(&fpq->lock); in fuse_abort_conn()
2146 fpq->connected = 0; in fuse_abort_conn()
2147 list_for_each_entry_safe(req, next, &fpq->io, list) { in fuse_abort_conn()
2148 req->out.h.error = -ECONNABORTED; in fuse_abort_conn()
2149 spin_lock(&req->waitq.lock); in fuse_abort_conn()
2150 set_bit(FR_ABORTED, &req->flags); in fuse_abort_conn()
2151 if (!test_bit(FR_LOCKED, &req->flags)) { in fuse_abort_conn()
2152 set_bit(FR_PRIVATE, &req->flags); in fuse_abort_conn()
2154 list_move(&req->list, &to_end); in fuse_abort_conn()
2156 spin_unlock(&req->waitq.lock); in fuse_abort_conn()
2159 list_splice_tail_init(&fpq->processing[i], in fuse_abort_conn()
2161 spin_unlock(&fpq->lock); in fuse_abort_conn()
2163 spin_lock(&fc->bg_lock); in fuse_abort_conn()
2164 fc->blocked = 0; in fuse_abort_conn()
2165 fc->max_background = UINT_MAX; in fuse_abort_conn()
2167 spin_unlock(&fc->bg_lock); in fuse_abort_conn()
2169 spin_lock(&fiq->lock); in fuse_abort_conn()
2170 fiq->connected = 0; in fuse_abort_conn()
2171 list_for_each_entry(req, &fiq->pending, list) in fuse_abort_conn()
2172 clear_bit(FR_PENDING, &req->flags); in fuse_abort_conn()
2173 list_splice_tail_init(&fiq->pending, &to_end); in fuse_abort_conn()
2174 while (forget_pending(fiq)) in fuse_abort_conn()
2175 kfree(fuse_dequeue_forget(fiq, 1, NULL)); in fuse_abort_conn()
2176 wake_up_all(&fiq->waitq); in fuse_abort_conn()
2177 spin_unlock(&fiq->lock); in fuse_abort_conn()
2178 kill_fasync(&fiq->fasync, SIGIO, POLL_IN); in fuse_abort_conn()
2180 wake_up_all(&fc->blocked_waitq); in fuse_abort_conn()
2181 spin_unlock(&fc->lock); in fuse_abort_conn()
2185 spin_unlock(&fc->lock); in fuse_abort_conn()
2194 wait_event(fc->blocked_waitq, atomic_read(&fc->num_waiting) == 0); in fuse_wait_aborted()
2202 struct fuse_conn *fc = fud->fc; in fuse_dev_release()
2203 struct fuse_pqueue *fpq = &fud->pq; in fuse_dev_release()
2207 spin_lock(&fpq->lock); in fuse_dev_release()
2208 WARN_ON(!list_empty(&fpq->io)); in fuse_dev_release()
2210 list_splice_init(&fpq->processing[i], &to_end); in fuse_dev_release()
2211 spin_unlock(&fpq->lock); in fuse_dev_release()
2215 /* Are we the last open device? */ in fuse_dev_release()
2216 if (atomic_dec_and_test(&fc->dev_count)) { in fuse_dev_release()
2217 WARN_ON(fc->iq.fasync != NULL); in fuse_dev_release()
2231 return -EPERM; in fuse_dev_fasync()
2233 /* No locking - fasync_helper does its own locking */ in fuse_dev_fasync()
2234 return fasync_helper(fd, file, on, &fud->fc->iq.fasync); in fuse_dev_fasync()
2241 if (new->private_data) in fuse_device_clone()
2242 return -EINVAL; in fuse_device_clone()
2246 return -ENOMEM; in fuse_device_clone()
2248 new->private_data = fud; in fuse_device_clone()
2249 atomic_inc(&fc->dev_count); in fuse_device_clone()
2265 return -EFAULT; in fuse_dev_ioctl()
2269 return -EINVAL; in fuse_dev_ioctl()
2272 * Check against file->f_op because CUSE in fuse_dev_ioctl()
2275 if (f.file->f_op == file->f_op) in fuse_dev_ioctl()
2278 res = -EINVAL; in fuse_dev_ioctl()
2281 res = fuse_device_clone(fud->fc, file); in fuse_dev_ioctl()
2287 res = -ENOTTY; in fuse_dev_ioctl()
2317 int err = -ENOMEM; in fuse_dev_init()