Lines Matching +full:cs +full:- +full:0
3 Copyright (C) 2001-2008 Miklos Szeredi <miklos@szeredi.hu>
29 #define FUSE_INT_REQ_BIT (1ULL << 0)
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()
185 unsigned nbytes = 0; in fuse_len_args()
188 for (i = 0; i < numargs; i++) in fuse_len_args()
197 fiq->reqctr += FUSE_REQ_ID_STEP; in fuse_get_unique()
198 return fiq->reqctr; in fuse_get_unique()
208 * A new request is available, wake fiq->waitq
211 __releases(fiq->lock) in fuse_dev_wake_and_unlock()
213 wake_up(&fiq->waitq); in fuse_dev_wake_and_unlock()
214 kill_fasync(&fiq->fasync, SIGIO, POLL_IN); in fuse_dev_wake_and_unlock()
215 spin_unlock(&fiq->lock); in fuse_dev_wake_and_unlock()
227 __releases(fiq->lock) in queue_request_and_unlock()
229 req->in.h.len = sizeof(struct fuse_in_header) + in queue_request_and_unlock()
230 fuse_len_args(req->args->in_numargs, in queue_request_and_unlock()
231 (struct fuse_arg *) req->args->in_args); in queue_request_and_unlock()
232 list_add_tail(&req->list, &fiq->pending); in queue_request_and_unlock()
233 fiq->ops->wake_pending_and_unlock(fiq); in queue_request_and_unlock()
239 struct fuse_iqueue *fiq = &fc->iq; in fuse_queue_forget()
241 forget->forget_one.nodeid = nodeid; in fuse_queue_forget()
242 forget->forget_one.nlookup = nlookup; in fuse_queue_forget()
244 spin_lock(&fiq->lock); in fuse_queue_forget()
245 if (fiq->connected) { in fuse_queue_forget()
246 fiq->forget_list_tail->next = forget; in fuse_queue_forget()
247 fiq->forget_list_tail = forget; in fuse_queue_forget()
248 fiq->ops->wake_forget_and_unlock(fiq); in fuse_queue_forget()
251 spin_unlock(&fiq->lock); in fuse_queue_forget()
257 struct fuse_iqueue *fiq = &fc->iq; in flush_bg_queue()
259 while (fc->active_background < fc->max_background && in flush_bg_queue()
260 !list_empty(&fc->bg_queue)) { in flush_bg_queue()
263 req = list_first_entry(&fc->bg_queue, struct fuse_req, list); in flush_bg_queue()
264 list_del(&req->list); in flush_bg_queue()
265 fc->active_background++; in flush_bg_queue()
266 spin_lock(&fiq->lock); in flush_bg_queue()
267 req->in.h.unique = fuse_get_unique(fiq); in flush_bg_queue()
282 struct fuse_mount *fm = req->fm; in fuse_request_end()
283 struct fuse_conn *fc = fm->fc; in fuse_request_end()
284 struct fuse_iqueue *fiq = &fc->iq; in fuse_request_end()
286 if (test_and_set_bit(FR_FINISHED, &req->flags)) in fuse_request_end()
294 if (test_bit(FR_INTERRUPTED, &req->flags)) { in fuse_request_end()
295 spin_lock(&fiq->lock); in fuse_request_end()
296 list_del_init(&req->intr_entry); in fuse_request_end()
297 spin_unlock(&fiq->lock); in fuse_request_end()
299 WARN_ON(test_bit(FR_PENDING, &req->flags)); in fuse_request_end()
300 WARN_ON(test_bit(FR_SENT, &req->flags)); in fuse_request_end()
301 if (test_bit(FR_BACKGROUND, &req->flags)) { in fuse_request_end()
302 spin_lock(&fc->bg_lock); in fuse_request_end()
303 clear_bit(FR_BACKGROUND, &req->flags); in fuse_request_end()
304 if (fc->num_background == fc->max_background) { in fuse_request_end()
305 fc->blocked = 0; in fuse_request_end()
306 wake_up(&fc->blocked_waitq); in fuse_request_end()
307 } else if (!fc->blocked) { in fuse_request_end()
311 * fc->blocked with waiters with the wake_up() call in fuse_request_end()
314 if (waitqueue_active(&fc->blocked_waitq)) in fuse_request_end()
315 wake_up(&fc->blocked_waitq); in fuse_request_end()
318 if (fc->num_background == fc->congestion_threshold && fm->sb) { in fuse_request_end()
319 clear_bdi_congested(fm->sb->s_bdi, BLK_RW_SYNC); in fuse_request_end()
320 clear_bdi_congested(fm->sb->s_bdi, BLK_RW_ASYNC); in fuse_request_end()
322 fc->num_background--; in fuse_request_end()
323 fc->active_background--; in fuse_request_end()
325 spin_unlock(&fc->bg_lock); in fuse_request_end()
328 wake_up(&req->waitq); in fuse_request_end()
331 if (test_bit(FR_ASYNC, &req->flags)) in fuse_request_end()
332 req->args->end(fm, req->args, req->out.h.error); in fuse_request_end()
340 struct fuse_iqueue *fiq = &req->fm->fc->iq; in queue_interrupt()
342 spin_lock(&fiq->lock); in queue_interrupt()
344 if (unlikely(!test_bit(FR_INTERRUPTED, &req->flags))) { in queue_interrupt()
345 spin_unlock(&fiq->lock); in queue_interrupt()
346 return -EINVAL; in queue_interrupt()
349 if (list_empty(&req->intr_entry)) { in queue_interrupt()
350 list_add_tail(&req->intr_entry, &fiq->interrupts); in queue_interrupt()
356 if (test_bit(FR_FINISHED, &req->flags)) { in queue_interrupt()
357 list_del_init(&req->intr_entry); in queue_interrupt()
358 spin_unlock(&fiq->lock); in queue_interrupt()
359 return 0; in queue_interrupt()
361 fiq->ops->wake_interrupt_and_unlock(fiq); in queue_interrupt()
363 spin_unlock(&fiq->lock); in queue_interrupt()
365 return 0; in queue_interrupt()
370 struct fuse_conn *fc = req->fm->fc; in request_wait_answer()
371 struct fuse_iqueue *fiq = &fc->iq; in request_wait_answer()
374 if (!fc->no_interrupt) { in request_wait_answer()
376 err = wait_event_interruptible(req->waitq, in request_wait_answer()
377 test_bit(FR_FINISHED, &req->flags)); in request_wait_answer()
381 set_bit(FR_INTERRUPTED, &req->flags); in request_wait_answer()
384 if (test_bit(FR_SENT, &req->flags)) in request_wait_answer()
388 if (!test_bit(FR_FORCE, &req->flags)) { in request_wait_answer()
390 err = wait_event_killable(req->waitq, in request_wait_answer()
391 test_bit(FR_FINISHED, &req->flags)); in request_wait_answer()
395 spin_lock(&fiq->lock); in request_wait_answer()
397 if (test_bit(FR_PENDING, &req->flags)) { in request_wait_answer()
398 list_del(&req->list); in request_wait_answer()
399 spin_unlock(&fiq->lock); in request_wait_answer()
401 req->out.h.error = -EINTR; in request_wait_answer()
404 spin_unlock(&fiq->lock); in request_wait_answer()
411 wait_event(req->waitq, test_bit(FR_FINISHED, &req->flags)); in request_wait_answer()
416 struct fuse_iqueue *fiq = &req->fm->fc->iq; in __fuse_request_send()
418 BUG_ON(test_bit(FR_BACKGROUND, &req->flags)); in __fuse_request_send()
419 spin_lock(&fiq->lock); in __fuse_request_send()
420 if (!fiq->connected) { in __fuse_request_send()
421 spin_unlock(&fiq->lock); in __fuse_request_send()
422 req->out.h.error = -ENOTCONN; in __fuse_request_send()
424 req->in.h.unique = fuse_get_unique(fiq); in __fuse_request_send()
438 if (fc->minor < 4 && args->opcode == FUSE_STATFS) in fuse_adjust_compat()
439 args->out_args[0].size = FUSE_COMPAT_STATFS_SIZE; in fuse_adjust_compat()
441 if (fc->minor < 9) { in fuse_adjust_compat()
442 switch (args->opcode) { in fuse_adjust_compat()
449 args->out_args[0].size = FUSE_COMPAT_ENTRY_OUT_SIZE; in fuse_adjust_compat()
453 args->out_args[0].size = FUSE_COMPAT_ATTR_OUT_SIZE; in fuse_adjust_compat()
457 if (fc->minor < 12) { in fuse_adjust_compat()
458 switch (args->opcode) { in fuse_adjust_compat()
460 args->in_args[0].size = sizeof(struct fuse_open_in); in fuse_adjust_compat()
463 args->in_args[0].size = FUSE_COMPAT_MKNOD_IN_SIZE; in fuse_adjust_compat()
471 struct fuse_conn *fc = req->fm->fc; in fuse_force_creds()
473 req->in.h.uid = from_kuid_munged(fc->user_ns, current_fsuid()); in fuse_force_creds()
474 req->in.h.gid = from_kgid_munged(fc->user_ns, current_fsgid()); in fuse_force_creds()
475 req->in.h.pid = pid_nr_ns(task_pid(current), fc->pid_ns); in fuse_force_creds()
480 req->in.h.opcode = args->opcode; in fuse_args_to_req()
481 req->in.h.nodeid = args->nodeid; in fuse_args_to_req()
482 req->args = args; in fuse_args_to_req()
483 if (args->end) in fuse_args_to_req()
484 __set_bit(FR_ASYNC, &req->flags); in fuse_args_to_req()
489 struct fuse_conn *fc = fm->fc; in fuse_simple_request()
493 if (args->force) { in fuse_simple_request()
494 atomic_inc(&fc->num_waiting); in fuse_simple_request()
497 if (!args->nocreds) in fuse_simple_request()
500 __set_bit(FR_WAITING, &req->flags); in fuse_simple_request()
501 __set_bit(FR_FORCE, &req->flags); in fuse_simple_request()
503 WARN_ON(args->nocreds); in fuse_simple_request()
509 /* Needs to be done after fuse_get_req() so that fc->minor is valid */ in fuse_simple_request()
513 if (!args->noreply) in fuse_simple_request()
514 __set_bit(FR_ISREPLY, &req->flags); in fuse_simple_request()
516 ret = req->out.h.error; in fuse_simple_request()
517 if (!ret && args->out_argvar) { in fuse_simple_request()
518 BUG_ON(args->out_numargs == 0); in fuse_simple_request()
519 ret = args->out_args[args->out_numargs - 1].size; in fuse_simple_request()
528 struct fuse_mount *fm = req->fm; in fuse_request_queue_background()
529 struct fuse_conn *fc = fm->fc; in fuse_request_queue_background()
532 WARN_ON(!test_bit(FR_BACKGROUND, &req->flags)); in fuse_request_queue_background()
533 if (!test_bit(FR_WAITING, &req->flags)) { in fuse_request_queue_background()
534 __set_bit(FR_WAITING, &req->flags); in fuse_request_queue_background()
535 atomic_inc(&fc->num_waiting); in fuse_request_queue_background()
537 __set_bit(FR_ISREPLY, &req->flags); in fuse_request_queue_background()
538 spin_lock(&fc->bg_lock); in fuse_request_queue_background()
539 if (likely(fc->connected)) { in fuse_request_queue_background()
540 fc->num_background++; in fuse_request_queue_background()
541 if (fc->num_background == fc->max_background) in fuse_request_queue_background()
542 fc->blocked = 1; in fuse_request_queue_background()
543 if (fc->num_background == fc->congestion_threshold && fm->sb) { in fuse_request_queue_background()
544 set_bdi_congested(fm->sb->s_bdi, BLK_RW_SYNC); in fuse_request_queue_background()
545 set_bdi_congested(fm->sb->s_bdi, BLK_RW_ASYNC); in fuse_request_queue_background()
547 list_add_tail(&req->list, &fc->bg_queue); in fuse_request_queue_background()
551 spin_unlock(&fc->bg_lock); in fuse_request_queue_background()
561 if (args->force) { in fuse_simple_background()
562 WARN_ON(!args->nocreds); in fuse_simple_background()
565 return -ENOMEM; in fuse_simple_background()
566 __set_bit(FR_BACKGROUND, &req->flags); in fuse_simple_background()
568 WARN_ON(args->nocreds); in fuse_simple_background()
578 return -ENOTCONN; in fuse_simple_background()
581 return 0; in fuse_simple_background()
589 struct fuse_iqueue *fiq = &fm->fc->iq; in fuse_simple_notify_reply()
590 int err = 0; in fuse_simple_notify_reply()
596 __clear_bit(FR_ISREPLY, &req->flags); in fuse_simple_notify_reply()
597 req->in.h.unique = unique; in fuse_simple_notify_reply()
601 spin_lock(&fiq->lock); in fuse_simple_notify_reply()
602 if (fiq->connected) { in fuse_simple_notify_reply()
605 err = -ENODEV; in fuse_simple_notify_reply()
606 spin_unlock(&fiq->lock); in fuse_simple_notify_reply()
615 * anything that could cause a page-fault. If the request was already
620 int err = 0; in lock_request()
622 spin_lock(&req->waitq.lock); in lock_request()
623 if (test_bit(FR_ABORTED, &req->flags)) in lock_request()
624 err = -ENOENT; in lock_request()
626 set_bit(FR_LOCKED, &req->flags); in lock_request()
627 spin_unlock(&req->waitq.lock); in lock_request()
638 int err = 0; in unlock_request()
640 spin_lock(&req->waitq.lock); in unlock_request()
641 if (test_bit(FR_ABORTED, &req->flags)) in unlock_request()
642 err = -ENOENT; in unlock_request()
644 clear_bit(FR_LOCKED, &req->flags); in unlock_request()
645 spin_unlock(&req->waitq.lock); in unlock_request()
664 static void fuse_copy_init(struct fuse_copy_state *cs, int write, in fuse_copy_init() argument
667 memset(cs, 0, sizeof(*cs)); in fuse_copy_init()
668 cs->write = write; in fuse_copy_init()
669 cs->iter = iter; in fuse_copy_init()
673 static void fuse_copy_finish(struct fuse_copy_state *cs) in fuse_copy_finish() argument
675 if (cs->currbuf) { in fuse_copy_finish()
676 struct pipe_buffer *buf = cs->currbuf; in fuse_copy_finish()
678 if (cs->write) in fuse_copy_finish()
679 buf->len = PAGE_SIZE - cs->len; in fuse_copy_finish()
680 cs->currbuf = NULL; in fuse_copy_finish()
681 } else if (cs->pg) { in fuse_copy_finish()
682 if (cs->write) { in fuse_copy_finish()
683 flush_dcache_page(cs->pg); in fuse_copy_finish()
684 set_page_dirty_lock(cs->pg); in fuse_copy_finish()
686 put_page(cs->pg); in fuse_copy_finish()
688 cs->pg = NULL; in fuse_copy_finish()
695 static int fuse_copy_fill(struct fuse_copy_state *cs) in fuse_copy_fill() argument
700 err = unlock_request(cs->req); in fuse_copy_fill()
704 fuse_copy_finish(cs); in fuse_copy_fill()
705 if (cs->pipebufs) { in fuse_copy_fill()
706 struct pipe_buffer *buf = cs->pipebufs; in fuse_copy_fill()
708 if (!cs->write) { in fuse_copy_fill()
709 err = pipe_buf_confirm(cs->pipe, buf); in fuse_copy_fill()
713 BUG_ON(!cs->nr_segs); in fuse_copy_fill()
714 cs->currbuf = buf; in fuse_copy_fill()
715 cs->pg = buf->page; in fuse_copy_fill()
716 cs->offset = buf->offset; in fuse_copy_fill()
717 cs->len = buf->len; in fuse_copy_fill()
718 cs->pipebufs++; in fuse_copy_fill()
719 cs->nr_segs--; in fuse_copy_fill()
721 if (cs->nr_segs >= cs->pipe->max_usage) in fuse_copy_fill()
722 return -EIO; in fuse_copy_fill()
726 return -ENOMEM; in fuse_copy_fill()
728 buf->page = page; in fuse_copy_fill()
729 buf->offset = 0; in fuse_copy_fill()
730 buf->len = 0; in fuse_copy_fill()
732 cs->currbuf = buf; in fuse_copy_fill()
733 cs->pg = page; in fuse_copy_fill()
734 cs->offset = 0; in fuse_copy_fill()
735 cs->len = PAGE_SIZE; in fuse_copy_fill()
736 cs->pipebufs++; in fuse_copy_fill()
737 cs->nr_segs++; in fuse_copy_fill()
741 err = iov_iter_get_pages(cs->iter, &page, PAGE_SIZE, 1, &off); in fuse_copy_fill()
742 if (err < 0) in fuse_copy_fill()
745 cs->len = err; in fuse_copy_fill()
746 cs->offset = off; in fuse_copy_fill()
747 cs->pg = page; in fuse_copy_fill()
748 iov_iter_advance(cs->iter, err); in fuse_copy_fill()
751 return lock_request(cs->req); in fuse_copy_fill()
755 static int fuse_copy_do(struct fuse_copy_state *cs, void **val, unsigned *size) in fuse_copy_do() argument
757 unsigned ncpy = min(*size, cs->len); in fuse_copy_do()
759 void *pgaddr = kmap_atomic(cs->pg); in fuse_copy_do()
760 void *buf = pgaddr + cs->offset; in fuse_copy_do()
762 if (cs->write) in fuse_copy_do()
770 *size -= ncpy; in fuse_copy_do()
771 cs->len -= ncpy; in fuse_copy_do()
772 cs->offset += ncpy; in fuse_copy_do()
779 page->mapping != NULL || in fuse_check_page()
780 (page->flags & PAGE_FLAGS_CHECK_AT_PREP & in fuse_check_page()
792 return 0; in fuse_check_page()
795 static int fuse_try_move_page(struct fuse_copy_state *cs, struct page **pagep) in fuse_try_move_page() argument
800 struct pipe_buffer *buf = cs->pipebufs; in fuse_try_move_page()
803 err = unlock_request(cs->req); in fuse_try_move_page()
807 fuse_copy_finish(cs); in fuse_try_move_page()
809 err = pipe_buf_confirm(cs->pipe, buf); in fuse_try_move_page()
813 BUG_ON(!cs->nr_segs); in fuse_try_move_page()
814 cs->currbuf = buf; in fuse_try_move_page()
815 cs->len = buf->len; in fuse_try_move_page()
816 cs->pipebufs++; in fuse_try_move_page()
817 cs->nr_segs--; in fuse_try_move_page()
819 if (cs->len != PAGE_SIZE) in fuse_try_move_page()
822 if (!pipe_buf_try_steal(cs->pipe, buf)) in fuse_try_move_page()
825 newpage = buf->page; in fuse_try_move_page()
832 if (fuse_check_page(newpage) != 0) in fuse_try_move_page()
852 if (!(buf->flags & PIPE_BUF_FLAG_LRU)) in fuse_try_move_page()
855 err = 0; in fuse_try_move_page()
856 spin_lock(&cs->req->waitq.lock); in fuse_try_move_page()
857 if (test_bit(FR_ABORTED, &cs->req->flags)) in fuse_try_move_page()
858 err = -ENOENT; in fuse_try_move_page()
861 spin_unlock(&cs->req->waitq.lock); in fuse_try_move_page()
870 /* Drop ref for ap->pages[] array */ in fuse_try_move_page()
872 cs->len = 0; in fuse_try_move_page()
874 err = 0; in fuse_try_move_page()
883 cs->pg = buf->page; in fuse_try_move_page()
884 cs->offset = buf->offset; in fuse_try_move_page()
886 err = lock_request(cs->req); in fuse_try_move_page()
893 static int fuse_ref_page(struct fuse_copy_state *cs, struct page *page, in fuse_ref_page() argument
899 if (cs->nr_segs >= cs->pipe->max_usage) in fuse_ref_page()
900 return -EIO; in fuse_ref_page()
903 err = unlock_request(cs->req); in fuse_ref_page()
909 fuse_copy_finish(cs); in fuse_ref_page()
911 buf = cs->pipebufs; in fuse_ref_page()
912 buf->page = page; in fuse_ref_page()
913 buf->offset = offset; in fuse_ref_page()
914 buf->len = count; in fuse_ref_page()
916 cs->pipebufs++; in fuse_ref_page()
917 cs->nr_segs++; in fuse_ref_page()
918 cs->len = 0; in fuse_ref_page()
920 return 0; in fuse_ref_page()
927 static int fuse_copy_page(struct fuse_copy_state *cs, struct page **pagep, in fuse_copy_page() argument
937 if (cs->write && cs->pipebufs && page) { in fuse_copy_page()
938 return fuse_ref_page(cs, page, offset, count); in fuse_copy_page()
939 } else if (!cs->len) { in fuse_copy_page()
940 if (cs->move_pages && page && in fuse_copy_page()
941 offset == 0 && count == PAGE_SIZE) { in fuse_copy_page()
942 err = fuse_try_move_page(cs, pagep); in fuse_copy_page()
943 if (err <= 0) in fuse_copy_page()
946 err = fuse_copy_fill(cs); in fuse_copy_page()
954 offset += fuse_copy_do(cs, &buf, &count); in fuse_copy_page()
957 offset += fuse_copy_do(cs, NULL, &count); in fuse_copy_page()
959 if (page && !cs->write) in fuse_copy_page()
961 return 0; in fuse_copy_page()
965 static int fuse_copy_pages(struct fuse_copy_state *cs, unsigned nbytes, in fuse_copy_pages() argument
969 struct fuse_req *req = cs->req; in fuse_copy_pages()
970 struct fuse_args_pages *ap = container_of(req->args, typeof(*ap), args); in fuse_copy_pages()
973 for (i = 0; i < ap->num_pages && (nbytes || zeroing); i++) { in fuse_copy_pages()
975 unsigned int offset = ap->descs[i].offset; in fuse_copy_pages()
976 unsigned int count = min(nbytes, ap->descs[i].length); in fuse_copy_pages()
978 err = fuse_copy_page(cs, &ap->pages[i], offset, count, zeroing); in fuse_copy_pages()
982 nbytes -= count; in fuse_copy_pages()
984 return 0; in fuse_copy_pages()
988 static int fuse_copy_one(struct fuse_copy_state *cs, void *val, unsigned size) in fuse_copy_one() argument
991 if (!cs->len) { in fuse_copy_one()
992 int err = fuse_copy_fill(cs); in fuse_copy_one()
996 fuse_copy_do(cs, &val, &size); in fuse_copy_one()
998 return 0; in fuse_copy_one()
1002 static int fuse_copy_args(struct fuse_copy_state *cs, unsigned numargs, in fuse_copy_args() argument
1006 int err = 0; in fuse_copy_args()
1009 for (i = 0; !err && i < numargs; i++) { in fuse_copy_args()
1011 if (i == numargs - 1 && argpages) in fuse_copy_args()
1012 err = fuse_copy_pages(cs, arg->size, zeroing); in fuse_copy_args()
1014 err = fuse_copy_one(cs, arg->value, arg->size); in fuse_copy_args()
1021 return fiq->forget_list_head.next != NULL; in forget_pending()
1026 return !list_empty(&fiq->pending) || !list_empty(&fiq->interrupts) || in request_pending()
1036 * Called with fiq->lock held, releases it
1039 struct fuse_copy_state *cs, in fuse_read_interrupt() argument
1041 __releases(fiq->lock) in fuse_read_interrupt()
1048 list_del_init(&req->intr_entry); in fuse_read_interrupt()
1049 memset(&ih, 0, sizeof(ih)); in fuse_read_interrupt()
1050 memset(&arg, 0, sizeof(arg)); in fuse_read_interrupt()
1053 ih.unique = (req->in.h.unique | FUSE_INT_REQ_BIT); in fuse_read_interrupt()
1054 arg.unique = req->in.h.unique; in fuse_read_interrupt()
1056 spin_unlock(&fiq->lock); in fuse_read_interrupt()
1058 return -EINVAL; in fuse_read_interrupt()
1060 err = fuse_copy_one(cs, &ih, sizeof(ih)); in fuse_read_interrupt()
1062 err = fuse_copy_one(cs, &arg, sizeof(arg)); in fuse_read_interrupt()
1063 fuse_copy_finish(cs); in fuse_read_interrupt()
1072 struct fuse_forget_link *head = fiq->forget_list_head.next; in fuse_dequeue_forget()
1076 for (count = 0; *newhead != NULL && count < max; count++) in fuse_dequeue_forget()
1077 newhead = &(*newhead)->next; in fuse_dequeue_forget()
1079 fiq->forget_list_head.next = *newhead; in fuse_dequeue_forget()
1081 if (fiq->forget_list_head.next == NULL) in fuse_dequeue_forget()
1082 fiq->forget_list_tail = &fiq->forget_list_head; in fuse_dequeue_forget()
1092 struct fuse_copy_state *cs, in fuse_read_single_forget() argument
1094 __releases(fiq->lock) in fuse_read_single_forget()
1099 .nlookup = forget->forget_one.nlookup, in fuse_read_single_forget()
1103 .nodeid = forget->forget_one.nodeid, in fuse_read_single_forget()
1108 spin_unlock(&fiq->lock); in fuse_read_single_forget()
1111 return -EINVAL; in fuse_read_single_forget()
1113 err = fuse_copy_one(cs, &ih, sizeof(ih)); in fuse_read_single_forget()
1115 err = fuse_copy_one(cs, &arg, sizeof(arg)); in fuse_read_single_forget()
1116 fuse_copy_finish(cs); in fuse_read_single_forget()
1125 struct fuse_copy_state *cs, size_t nbytes) in fuse_read_batch_forget() argument
1126 __releases(fiq->lock) in fuse_read_batch_forget()
1132 struct fuse_batch_forget_in arg = { .count = 0 }; in fuse_read_batch_forget()
1140 spin_unlock(&fiq->lock); in fuse_read_batch_forget()
1141 return -EINVAL; in fuse_read_batch_forget()
1144 max_forgets = (nbytes - ih.len) / sizeof(struct fuse_forget_one); in fuse_read_batch_forget()
1146 spin_unlock(&fiq->lock); in fuse_read_batch_forget()
1150 err = fuse_copy_one(cs, &ih, sizeof(ih)); in fuse_read_batch_forget()
1152 err = fuse_copy_one(cs, &arg, sizeof(arg)); in fuse_read_batch_forget()
1158 err = fuse_copy_one(cs, &forget->forget_one, in fuse_read_batch_forget()
1159 sizeof(forget->forget_one)); in fuse_read_batch_forget()
1161 head = forget->next; in fuse_read_batch_forget()
1165 fuse_copy_finish(cs); in fuse_read_batch_forget()
1174 struct fuse_copy_state *cs, in fuse_read_forget() argument
1176 __releases(fiq->lock) in fuse_read_forget()
1178 if (fc->minor < 16 || fiq->forget_list_head.next->next == NULL) in fuse_read_forget()
1179 return fuse_read_single_forget(fiq, cs, nbytes); in fuse_read_forget()
1181 return fuse_read_batch_forget(fiq, cs, nbytes); in fuse_read_forget()
1194 struct fuse_copy_state *cs, size_t nbytes) in fuse_dev_do_read() argument
1197 struct fuse_conn *fc = fud->fc; in fuse_dev_do_read()
1198 struct fuse_iqueue *fiq = &fc->iq; in fuse_dev_do_read()
1199 struct fuse_pqueue *fpq = &fud->pq; in fuse_dev_do_read()
1206 * Require sane minimum read buffer - that has capacity for fixed part in fuse_dev_do_read()
1220 fc->max_write)) in fuse_dev_do_read()
1221 return -EINVAL; in fuse_dev_do_read()
1225 spin_lock(&fiq->lock); in fuse_dev_do_read()
1226 if (!fiq->connected || request_pending(fiq)) in fuse_dev_do_read()
1228 spin_unlock(&fiq->lock); in fuse_dev_do_read()
1230 if (file->f_flags & O_NONBLOCK) in fuse_dev_do_read()
1231 return -EAGAIN; in fuse_dev_do_read()
1232 err = wait_event_interruptible_exclusive(fiq->waitq, in fuse_dev_do_read()
1233 !fiq->connected || request_pending(fiq)); in fuse_dev_do_read()
1238 if (!fiq->connected) { in fuse_dev_do_read()
1239 err = fc->aborted ? -ECONNABORTED : -ENODEV; in fuse_dev_do_read()
1243 if (!list_empty(&fiq->interrupts)) { in fuse_dev_do_read()
1244 req = list_entry(fiq->interrupts.next, struct fuse_req, in fuse_dev_do_read()
1246 return fuse_read_interrupt(fiq, cs, nbytes, req); in fuse_dev_do_read()
1250 if (list_empty(&fiq->pending) || fiq->forget_batch-- > 0) in fuse_dev_do_read()
1251 return fuse_read_forget(fc, fiq, cs, nbytes); in fuse_dev_do_read()
1253 if (fiq->forget_batch <= -8) in fuse_dev_do_read()
1254 fiq->forget_batch = 16; in fuse_dev_do_read()
1257 req = list_entry(fiq->pending.next, struct fuse_req, list); in fuse_dev_do_read()
1258 clear_bit(FR_PENDING, &req->flags); in fuse_dev_do_read()
1259 list_del_init(&req->list); in fuse_dev_do_read()
1260 spin_unlock(&fiq->lock); in fuse_dev_do_read()
1262 args = req->args; in fuse_dev_do_read()
1263 reqsize = req->in.h.len; in fuse_dev_do_read()
1267 req->out.h.error = -EIO; in fuse_dev_do_read()
1269 if (args->opcode == FUSE_SETXATTR) in fuse_dev_do_read()
1270 req->out.h.error = -E2BIG; in fuse_dev_do_read()
1274 spin_lock(&fpq->lock); in fuse_dev_do_read()
1276 * Must not put request on fpq->io queue after having been shut down by in fuse_dev_do_read()
1279 if (!fpq->connected) { in fuse_dev_do_read()
1280 req->out.h.error = err = -ECONNABORTED; in fuse_dev_do_read()
1284 list_add(&req->list, &fpq->io); in fuse_dev_do_read()
1285 spin_unlock(&fpq->lock); in fuse_dev_do_read()
1286 cs->req = req; in fuse_dev_do_read()
1287 err = fuse_copy_one(cs, &req->in.h, sizeof(req->in.h)); in fuse_dev_do_read()
1289 err = fuse_copy_args(cs, args->in_numargs, args->in_pages, in fuse_dev_do_read()
1290 (struct fuse_arg *) args->in_args, 0); in fuse_dev_do_read()
1291 fuse_copy_finish(cs); in fuse_dev_do_read()
1292 spin_lock(&fpq->lock); in fuse_dev_do_read()
1293 clear_bit(FR_LOCKED, &req->flags); in fuse_dev_do_read()
1294 if (!fpq->connected) { in fuse_dev_do_read()
1295 err = fc->aborted ? -ECONNABORTED : -ENODEV; in fuse_dev_do_read()
1299 req->out.h.error = -EIO; in fuse_dev_do_read()
1302 if (!test_bit(FR_ISREPLY, &req->flags)) { in fuse_dev_do_read()
1306 hash = fuse_req_hash(req->in.h.unique); in fuse_dev_do_read()
1307 list_move_tail(&req->list, &fpq->processing[hash]); in fuse_dev_do_read()
1309 set_bit(FR_SENT, &req->flags); in fuse_dev_do_read()
1310 spin_unlock(&fpq->lock); in fuse_dev_do_read()
1313 if (test_bit(FR_INTERRUPTED, &req->flags)) in fuse_dev_do_read()
1320 if (!test_bit(FR_PRIVATE, &req->flags)) in fuse_dev_do_read()
1321 list_del_init(&req->list); in fuse_dev_do_read()
1322 spin_unlock(&fpq->lock); in fuse_dev_do_read()
1327 spin_unlock(&fiq->lock); in fuse_dev_do_read()
1338 file->private_data = NULL; in fuse_dev_open()
1339 return 0; in fuse_dev_open()
1344 struct fuse_copy_state cs; in fuse_dev_read() local
1345 struct file *file = iocb->ki_filp; in fuse_dev_read()
1349 return -EPERM; in fuse_dev_read()
1352 return -EINVAL; in fuse_dev_read()
1354 fuse_copy_init(&cs, 1, to); in fuse_dev_read()
1356 return fuse_dev_do_read(fud, file, &cs, iov_iter_count(to)); in fuse_dev_read()
1364 int page_nr = 0; in fuse_dev_splice_read()
1366 struct fuse_copy_state cs; in fuse_dev_splice_read() local
1370 return -EPERM; in fuse_dev_splice_read()
1372 bufs = kvmalloc_array(pipe->max_usage, sizeof(struct pipe_buffer), in fuse_dev_splice_read()
1375 return -ENOMEM; in fuse_dev_splice_read()
1377 fuse_copy_init(&cs, 1, NULL); in fuse_dev_splice_read()
1378 cs.pipebufs = bufs; in fuse_dev_splice_read()
1379 cs.pipe = pipe; in fuse_dev_splice_read()
1380 ret = fuse_dev_do_read(fud, in, &cs, len); in fuse_dev_splice_read()
1381 if (ret < 0) in fuse_dev_splice_read()
1384 if (pipe_occupancy(pipe->head, pipe->tail) + cs.nr_segs > pipe->max_usage) { in fuse_dev_splice_read()
1385 ret = -EIO; in fuse_dev_splice_read()
1389 for (ret = total = 0; page_nr < cs.nr_segs; total += ret) { in fuse_dev_splice_read()
1391 * Need to be careful about this. Having buf->ops in module in fuse_dev_splice_read()
1395 bufs[page_nr].flags = 0; in fuse_dev_splice_read()
1397 if (unlikely(ret < 0)) in fuse_dev_splice_read()
1403 for (; page_nr < cs.nr_segs; page_nr++) in fuse_dev_splice_read()
1411 struct fuse_copy_state *cs) in fuse_notify_poll() argument
1414 int err = -EINVAL; in fuse_notify_poll()
1419 err = fuse_copy_one(cs, &outarg, sizeof(outarg)); in fuse_notify_poll()
1423 fuse_copy_finish(cs); in fuse_notify_poll()
1427 fuse_copy_finish(cs); in fuse_notify_poll()
1432 struct fuse_copy_state *cs) in fuse_notify_inval_inode() argument
1435 int err = -EINVAL; in fuse_notify_inval_inode()
1440 err = fuse_copy_one(cs, &outarg, sizeof(outarg)); in fuse_notify_inval_inode()
1443 fuse_copy_finish(cs); in fuse_notify_inval_inode()
1445 down_read(&fc->killsb); in fuse_notify_inval_inode()
1448 up_read(&fc->killsb); in fuse_notify_inval_inode()
1452 fuse_copy_finish(cs); in fuse_notify_inval_inode()
1457 struct fuse_copy_state *cs) in fuse_notify_inval_entry() argument
1460 int err = -ENOMEM; in fuse_notify_inval_entry()
1468 err = -EINVAL; in fuse_notify_inval_entry()
1472 err = fuse_copy_one(cs, &outarg, sizeof(outarg)); in fuse_notify_inval_entry()
1476 err = -ENAMETOOLONG; in fuse_notify_inval_entry()
1480 err = -EINVAL; in fuse_notify_inval_entry()
1486 err = fuse_copy_one(cs, buf, outarg.namelen + 1); in fuse_notify_inval_entry()
1489 fuse_copy_finish(cs); in fuse_notify_inval_entry()
1490 buf[outarg.namelen] = 0; in fuse_notify_inval_entry()
1492 down_read(&fc->killsb); in fuse_notify_inval_entry()
1493 err = fuse_reverse_inval_entry(fc, outarg.parent, 0, &name); in fuse_notify_inval_entry()
1494 up_read(&fc->killsb); in fuse_notify_inval_entry()
1500 fuse_copy_finish(cs); in fuse_notify_inval_entry()
1505 struct fuse_copy_state *cs) in fuse_notify_delete() argument
1508 int err = -ENOMEM; in fuse_notify_delete()
1516 err = -EINVAL; in fuse_notify_delete()
1520 err = fuse_copy_one(cs, &outarg, sizeof(outarg)); in fuse_notify_delete()
1524 err = -ENAMETOOLONG; in fuse_notify_delete()
1528 err = -EINVAL; in fuse_notify_delete()
1534 err = fuse_copy_one(cs, buf, outarg.namelen + 1); in fuse_notify_delete()
1537 fuse_copy_finish(cs); in fuse_notify_delete()
1538 buf[outarg.namelen] = 0; in fuse_notify_delete()
1540 down_read(&fc->killsb); in fuse_notify_delete()
1542 up_read(&fc->killsb); in fuse_notify_delete()
1548 fuse_copy_finish(cs); in fuse_notify_delete()
1553 struct fuse_copy_state *cs) in fuse_notify_store() argument
1566 err = -EINVAL; in fuse_notify_store()
1570 err = fuse_copy_one(cs, &outarg, sizeof(outarg)); in fuse_notify_store()
1574 err = -EINVAL; in fuse_notify_store()
1575 if (size - sizeof(outarg) != outarg.size) in fuse_notify_store()
1580 down_read(&fc->killsb); in fuse_notify_store()
1582 err = -ENOENT; in fuse_notify_store()
1587 mapping = inode->i_mapping; in fuse_notify_store()
1602 err = -ENOMEM; in fuse_notify_store()
1608 this_num = min_t(unsigned, num, PAGE_SIZE - offset); in fuse_notify_store()
1609 err = fuse_copy_page(cs, &page, offset, this_num, 0); in fuse_notify_store()
1610 if (!err && offset == 0 && in fuse_notify_store()
1619 num -= this_num; in fuse_notify_store()
1620 offset = 0; in fuse_notify_store()
1624 err = 0; in fuse_notify_store()
1629 up_read(&fc->killsb); in fuse_notify_store()
1631 fuse_copy_finish(cs); in fuse_notify_store()
1646 release_pages(ra->ap.pages, ra->ap.num_pages); in fuse_retrieve_end()
1654 struct address_space *mapping = inode->i_mapping; in fuse_retrieve()
1659 size_t total_len = 0; in fuse_retrieve()
1661 struct fuse_conn *fc = fm->fc; in fuse_retrieve()
1667 offset = outarg->offset & ~PAGE_MASK; in fuse_retrieve()
1670 num = min(outarg->size, fc->max_write); in fuse_retrieve()
1671 if (outarg->offset > file_size) in fuse_retrieve()
1672 num = 0; in fuse_retrieve()
1673 else if (outarg->offset + num > file_size) in fuse_retrieve()
1674 num = file_size - outarg->offset; in fuse_retrieve()
1676 num_pages = (num + offset + PAGE_SIZE - 1) >> PAGE_SHIFT; in fuse_retrieve()
1677 num_pages = min(num_pages, fc->max_pages); in fuse_retrieve()
1679 args_size += num_pages * (sizeof(ap->pages[0]) + sizeof(ap->descs[0])); in fuse_retrieve()
1683 return -ENOMEM; in fuse_retrieve()
1685 ap = &ra->ap; in fuse_retrieve()
1686 ap->pages = (void *) (ra + 1); in fuse_retrieve()
1687 ap->descs = (void *) (ap->pages + num_pages); in fuse_retrieve()
1689 args = &ap->args; in fuse_retrieve()
1690 args->nodeid = outarg->nodeid; in fuse_retrieve()
1691 args->opcode = FUSE_NOTIFY_REPLY; in fuse_retrieve()
1692 args->in_numargs = 2; in fuse_retrieve()
1693 args->in_pages = true; in fuse_retrieve()
1694 args->end = fuse_retrieve_end; in fuse_retrieve()
1696 index = outarg->offset >> PAGE_SHIFT; in fuse_retrieve()
1698 while (num && ap->num_pages < num_pages) { in fuse_retrieve()
1706 this_num = min_t(unsigned, num, PAGE_SIZE - offset); in fuse_retrieve()
1707 ap->pages[ap->num_pages] = page; in fuse_retrieve()
1708 ap->descs[ap->num_pages].offset = offset; in fuse_retrieve()
1709 ap->descs[ap->num_pages].length = this_num; in fuse_retrieve()
1710 ap->num_pages++; in fuse_retrieve()
1712 offset = 0; in fuse_retrieve()
1713 num -= this_num; in fuse_retrieve()
1717 ra->inarg.offset = outarg->offset; in fuse_retrieve()
1718 ra->inarg.size = total_len; in fuse_retrieve()
1719 args->in_args[0].size = sizeof(ra->inarg); in fuse_retrieve()
1720 args->in_args[0].value = &ra->inarg; in fuse_retrieve()
1721 args->in_args[1].size = total_len; in fuse_retrieve()
1723 err = fuse_simple_notify_reply(fm, args, outarg->notify_unique); in fuse_retrieve()
1731 struct fuse_copy_state *cs) in fuse_notify_retrieve() argument
1739 err = -EINVAL; in fuse_notify_retrieve()
1743 err = fuse_copy_one(cs, &outarg, sizeof(outarg)); in fuse_notify_retrieve()
1747 fuse_copy_finish(cs); in fuse_notify_retrieve()
1749 down_read(&fc->killsb); in fuse_notify_retrieve()
1750 err = -ENOENT; in fuse_notify_retrieve()
1758 up_read(&fc->killsb); in fuse_notify_retrieve()
1763 fuse_copy_finish(cs); in fuse_notify_retrieve()
1768 unsigned int size, struct fuse_copy_state *cs) in fuse_notify() argument
1771 cs->move_pages = 0; in fuse_notify()
1775 return fuse_notify_poll(fc, size, cs); in fuse_notify()
1778 return fuse_notify_inval_inode(fc, size, cs); in fuse_notify()
1781 return fuse_notify_inval_entry(fc, size, cs); in fuse_notify()
1784 return fuse_notify_store(fc, size, cs); in fuse_notify()
1787 return fuse_notify_retrieve(fc, size, cs); in fuse_notify()
1790 return fuse_notify_delete(fc, size, cs); in fuse_notify()
1793 fuse_copy_finish(cs); in fuse_notify()
1794 return -EINVAL; in fuse_notify()
1804 list_for_each_entry(req, &fpq->processing[hash], list) { in request_find()
1805 if (req->in.h.unique == unique) in request_find()
1811 static int copy_out_args(struct fuse_copy_state *cs, struct fuse_args *args, in copy_out_args() argument
1816 reqsize += fuse_len_args(args->out_numargs, args->out_args); in copy_out_args()
1818 if (reqsize < nbytes || (reqsize > nbytes && !args->out_argvar)) in copy_out_args()
1819 return -EINVAL; in copy_out_args()
1821 struct fuse_arg *lastarg = &args->out_args[args->out_numargs-1]; in copy_out_args()
1822 unsigned diffsize = reqsize - nbytes; in copy_out_args()
1824 if (diffsize > lastarg->size) in copy_out_args()
1825 return -EINVAL; in copy_out_args()
1826 lastarg->size -= diffsize; in copy_out_args()
1828 return fuse_copy_args(cs, args->out_numargs, args->out_pages, in copy_out_args()
1829 args->out_args, args->page_zeroing); in copy_out_args()
1840 struct fuse_copy_state *cs, size_t nbytes) in fuse_dev_do_write() argument
1843 struct fuse_conn *fc = fud->fc; in fuse_dev_do_write()
1844 struct fuse_pqueue *fpq = &fud->pq; in fuse_dev_do_write()
1848 err = -EINVAL; in fuse_dev_do_write()
1852 err = fuse_copy_one(cs, &oh, sizeof(oh)); in fuse_dev_do_write()
1856 err = -EINVAL; in fuse_dev_do_write()
1865 err = fuse_notify(fc, oh.error, nbytes - sizeof(oh), cs); in fuse_dev_do_write()
1869 err = -EINVAL; in fuse_dev_do_write()
1870 if (oh.error <= -512 || oh.error > 0) in fuse_dev_do_write()
1873 spin_lock(&fpq->lock); in fuse_dev_do_write()
1875 if (fpq->connected) in fuse_dev_do_write()
1878 err = -ENOENT; in fuse_dev_do_write()
1880 spin_unlock(&fpq->lock); in fuse_dev_do_write()
1887 spin_unlock(&fpq->lock); in fuse_dev_do_write()
1889 err = 0; in fuse_dev_do_write()
1891 err = -EINVAL; in fuse_dev_do_write()
1892 else if (oh.error == -ENOSYS) in fuse_dev_do_write()
1893 fc->no_interrupt = 1; in fuse_dev_do_write()
1894 else if (oh.error == -EAGAIN) in fuse_dev_do_write()
1902 clear_bit(FR_SENT, &req->flags); in fuse_dev_do_write()
1903 list_move(&req->list, &fpq->io); in fuse_dev_do_write()
1904 req->out.h = oh; in fuse_dev_do_write()
1905 set_bit(FR_LOCKED, &req->flags); in fuse_dev_do_write()
1906 spin_unlock(&fpq->lock); in fuse_dev_do_write()
1907 cs->req = req; in fuse_dev_do_write()
1908 if (!req->args->page_replace) in fuse_dev_do_write()
1909 cs->move_pages = 0; in fuse_dev_do_write()
1912 err = nbytes != sizeof(oh) ? -EINVAL : 0; in fuse_dev_do_write()
1914 err = copy_out_args(cs, req->args, nbytes); in fuse_dev_do_write()
1915 fuse_copy_finish(cs); in fuse_dev_do_write()
1917 spin_lock(&fpq->lock); in fuse_dev_do_write()
1918 clear_bit(FR_LOCKED, &req->flags); in fuse_dev_do_write()
1919 if (!fpq->connected) in fuse_dev_do_write()
1920 err = -ENOENT; in fuse_dev_do_write()
1922 req->out.h.error = -EIO; in fuse_dev_do_write()
1923 if (!test_bit(FR_PRIVATE, &req->flags)) in fuse_dev_do_write()
1924 list_del_init(&req->list); in fuse_dev_do_write()
1925 spin_unlock(&fpq->lock); in fuse_dev_do_write()
1932 fuse_copy_finish(cs); in fuse_dev_do_write()
1938 struct fuse_copy_state cs; in fuse_dev_write() local
1939 struct fuse_dev *fud = fuse_get_dev(iocb->ki_filp); in fuse_dev_write()
1942 return -EPERM; in fuse_dev_write()
1945 return -EINVAL; in fuse_dev_write()
1947 fuse_copy_init(&cs, 0, from); in fuse_dev_write()
1949 return fuse_dev_do_write(fud, &cs, iov_iter_count(from)); in fuse_dev_write()
1960 struct fuse_copy_state cs; in fuse_dev_splice_write() local
1967 return -EPERM; in fuse_dev_splice_write()
1971 head = pipe->head; in fuse_dev_splice_write()
1972 tail = pipe->tail; in fuse_dev_splice_write()
1973 mask = pipe->ring_size - 1; in fuse_dev_splice_write()
1974 count = head - tail; in fuse_dev_splice_write()
1979 return -ENOMEM; in fuse_dev_splice_write()
1982 nbuf = 0; in fuse_dev_splice_write()
1983 rem = 0; in fuse_dev_splice_write()
1985 rem += pipe->bufs[idx & mask].len; in fuse_dev_splice_write()
1987 ret = -EINVAL; in fuse_dev_splice_write()
1999 ibuf = &pipe->bufs[tail & mask]; in fuse_dev_splice_write()
2002 if (rem >= ibuf->len) { in fuse_dev_splice_write()
2004 ibuf->ops = NULL; in fuse_dev_splice_write()
2006 pipe->tail = tail; in fuse_dev_splice_write()
2012 obuf->flags &= ~PIPE_BUF_FLAG_GIFT; in fuse_dev_splice_write()
2013 obuf->len = rem; in fuse_dev_splice_write()
2014 ibuf->offset += obuf->len; in fuse_dev_splice_write()
2015 ibuf->len -= obuf->len; in fuse_dev_splice_write()
2018 rem -= obuf->len; in fuse_dev_splice_write()
2022 fuse_copy_init(&cs, 0, NULL); in fuse_dev_splice_write()
2023 cs.pipebufs = bufs; in fuse_dev_splice_write()
2024 cs.nr_segs = nbuf; in fuse_dev_splice_write()
2025 cs.pipe = pipe; in fuse_dev_splice_write()
2028 cs.move_pages = 1; in fuse_dev_splice_write()
2030 ret = fuse_dev_do_write(fud, &cs, len); in fuse_dev_splice_write()
2034 for (idx = 0; idx < nbuf; idx++) in fuse_dev_splice_write()
2051 fiq = &fud->fc->iq; in fuse_dev_poll()
2052 poll_wait(file, &fiq->waitq, wait); in fuse_dev_poll()
2054 spin_lock(&fiq->lock); in fuse_dev_poll()
2055 if (!fiq->connected) in fuse_dev_poll()
2059 spin_unlock(&fiq->lock); in fuse_dev_poll()
2069 req = list_entry(head->next, struct fuse_req, list); in end_requests()
2070 req->out.h.error = -ECONNABORTED; in end_requests()
2071 clear_bit(FR_SENT, &req->flags); in end_requests()
2072 list_del_init(&req->list); in end_requests()
2081 p = rb_first(&fc->polled_files); in end_polls()
2086 wake_up_interruptible_all(&ff->poll_wait); in end_polls()
2112 struct fuse_iqueue *fiq = &fc->iq; in fuse_abort_conn()
2114 spin_lock(&fc->lock); in fuse_abort_conn()
2115 if (fc->connected) { in fuse_abort_conn()
2121 /* Background queuing checks fc->connected under bg_lock */ in fuse_abort_conn()
2122 spin_lock(&fc->bg_lock); in fuse_abort_conn()
2123 fc->connected = 0; in fuse_abort_conn()
2124 spin_unlock(&fc->bg_lock); in fuse_abort_conn()
2127 list_for_each_entry(fud, &fc->devices, entry) { in fuse_abort_conn()
2128 struct fuse_pqueue *fpq = &fud->pq; in fuse_abort_conn()
2130 spin_lock(&fpq->lock); in fuse_abort_conn()
2131 fpq->connected = 0; in fuse_abort_conn()
2132 list_for_each_entry_safe(req, next, &fpq->io, list) { in fuse_abort_conn()
2133 req->out.h.error = -ECONNABORTED; in fuse_abort_conn()
2134 spin_lock(&req->waitq.lock); in fuse_abort_conn()
2135 set_bit(FR_ABORTED, &req->flags); in fuse_abort_conn()
2136 if (!test_bit(FR_LOCKED, &req->flags)) { in fuse_abort_conn()
2137 set_bit(FR_PRIVATE, &req->flags); in fuse_abort_conn()
2139 list_move(&req->list, &to_end); in fuse_abort_conn()
2141 spin_unlock(&req->waitq.lock); in fuse_abort_conn()
2143 for (i = 0; i < FUSE_PQ_HASH_SIZE; i++) in fuse_abort_conn()
2144 list_splice_tail_init(&fpq->processing[i], in fuse_abort_conn()
2146 spin_unlock(&fpq->lock); in fuse_abort_conn()
2148 spin_lock(&fc->bg_lock); in fuse_abort_conn()
2149 fc->blocked = 0; in fuse_abort_conn()
2150 fc->max_background = UINT_MAX; in fuse_abort_conn()
2152 spin_unlock(&fc->bg_lock); in fuse_abort_conn()
2154 spin_lock(&fiq->lock); in fuse_abort_conn()
2155 fiq->connected = 0; in fuse_abort_conn()
2156 list_for_each_entry(req, &fiq->pending, list) in fuse_abort_conn()
2157 clear_bit(FR_PENDING, &req->flags); in fuse_abort_conn()
2158 list_splice_tail_init(&fiq->pending, &to_end); in fuse_abort_conn()
2161 wake_up_all(&fiq->waitq); in fuse_abort_conn()
2162 spin_unlock(&fiq->lock); in fuse_abort_conn()
2163 kill_fasync(&fiq->fasync, SIGIO, POLL_IN); in fuse_abort_conn()
2165 wake_up_all(&fc->blocked_waitq); in fuse_abort_conn()
2166 spin_unlock(&fc->lock); in fuse_abort_conn()
2170 spin_unlock(&fc->lock); in fuse_abort_conn()
2179 wait_event(fc->blocked_waitq, atomic_read(&fc->num_waiting) == 0); in fuse_wait_aborted()
2187 struct fuse_conn *fc = fud->fc; in fuse_dev_release()
2188 struct fuse_pqueue *fpq = &fud->pq; in fuse_dev_release()
2192 spin_lock(&fpq->lock); in fuse_dev_release()
2193 WARN_ON(!list_empty(&fpq->io)); in fuse_dev_release()
2194 for (i = 0; i < FUSE_PQ_HASH_SIZE; i++) in fuse_dev_release()
2195 list_splice_init(&fpq->processing[i], &to_end); in fuse_dev_release()
2196 spin_unlock(&fpq->lock); in fuse_dev_release()
2201 if (atomic_dec_and_test(&fc->dev_count)) { in fuse_dev_release()
2202 WARN_ON(fc->iq.fasync != NULL); in fuse_dev_release()
2207 return 0; in fuse_dev_release()
2216 return -EPERM; in fuse_dev_fasync()
2218 /* No locking - fasync_helper does its own locking */ in fuse_dev_fasync()
2219 return fasync_helper(fd, file, on, &fud->fc->iq.fasync); in fuse_dev_fasync()
2226 if (new->private_data) in fuse_device_clone()
2227 return -EINVAL; in fuse_device_clone()
2231 return -ENOMEM; in fuse_device_clone()
2233 new->private_data = fud; in fuse_device_clone()
2234 atomic_inc(&fc->dev_count); in fuse_device_clone()
2236 return 0; in fuse_device_clone()
2248 res = -EFAULT; in fuse_dev_ioctl()
2252 res = -EINVAL; in fuse_dev_ioctl()
2255 * Check against file->f_op because CUSE in fuse_dev_ioctl()
2258 if (old->f_op == file->f_op && in fuse_dev_ioctl()
2259 old->f_cred->user_ns == file->f_cred->user_ns) in fuse_dev_ioctl()
2264 res = fuse_device_clone(fud->fc, file); in fuse_dev_ioctl()
2272 res = -ENOTTY; in fuse_dev_ioctl()
2302 int err = -ENOMEM; in fuse_dev_init()
2305 0, 0, NULL); in fuse_dev_init()
2313 return 0; in fuse_dev_init()