Lines Matching +full:cs +full:- +full:out
3 Copyright (C) 2001-2008 Miklos Szeredi <miklos@szeredi.hu>
45 return time_is_before_jiffies(req->create_time + fc->timeout.req_timeout); in fuse_request_expired()
62 * - check the fiq pending list
63 * - check the bg queue
64 * - check the fpq io and processing lists
69 * between lists, re-sent requests at the head of the pending list having a
78 struct fuse_iqueue *fiq = &fc->iq; in fuse_check_timeout()
83 if (!atomic_read(&fc->num_waiting)) in fuse_check_timeout()
84 goto out; in fuse_check_timeout()
86 spin_lock(&fiq->lock); in fuse_check_timeout()
87 expired = fuse_request_expired(fc, &fiq->pending); in fuse_check_timeout()
88 spin_unlock(&fiq->lock); in fuse_check_timeout()
92 spin_lock(&fc->bg_lock); in fuse_check_timeout()
93 expired = fuse_request_expired(fc, &fc->bg_queue); in fuse_check_timeout()
94 spin_unlock(&fc->bg_lock); in fuse_check_timeout()
98 spin_lock(&fc->lock); in fuse_check_timeout()
99 if (!fc->connected) { in fuse_check_timeout()
100 spin_unlock(&fc->lock); in fuse_check_timeout()
103 list_for_each_entry(fud, &fc->devices, entry) { in fuse_check_timeout()
104 fpq = &fud->pq; in fuse_check_timeout()
105 spin_lock(&fpq->lock); in fuse_check_timeout()
106 if (fuse_request_expired(fc, &fpq->io) || in fuse_check_timeout()
107 fuse_fpq_processing_expired(fc, fpq->processing)) { in fuse_check_timeout()
108 spin_unlock(&fpq->lock); in fuse_check_timeout()
109 spin_unlock(&fc->lock); in fuse_check_timeout()
113 spin_unlock(&fpq->lock); in fuse_check_timeout()
115 spin_unlock(&fc->lock); in fuse_check_timeout()
120 out: in fuse_check_timeout()
121 queue_delayed_work(system_wq, &fc->timeout.work, in fuse_check_timeout()
131 INIT_LIST_HEAD(&req->list); in fuse_request_init()
132 INIT_LIST_HEAD(&req->intr_entry); in fuse_request_init()
133 init_waitqueue_head(&req->waitq); in fuse_request_init()
134 refcount_set(&req->count, 1); in fuse_request_init()
135 __set_bit(FR_PENDING, &req->flags); in fuse_request_init()
136 req->fm = fm; in fuse_request_init()
137 req->create_time = jiffies; in fuse_request_init()
156 refcount_inc(&req->count); in __fuse_get_request()
162 refcount_dec(&req->count); in __fuse_put_request()
169 fc->initialized = 1; in fuse_set_initialized()
174 return !fc->initialized || (for_background && fc->blocked) || in fuse_block_alloc()
175 (fc->io_uring && fc->connected && !fuse_uring_ready(fc)); in fuse_block_alloc()
181 * lockess check of fc->connected is okay, because atomic_dec_and_test() in fuse_drop_waiting()
183 * to ensure no wake-up is missed. in fuse_drop_waiting()
185 if (atomic_dec_and_test(&fc->num_waiting) && in fuse_drop_waiting()
186 !READ_ONCE(fc->connected)) { in fuse_drop_waiting()
188 wake_up_all(&fc->blocked_waitq); in fuse_drop_waiting()
198 struct fuse_conn *fc = fm->fc; in fuse_get_req()
200 bool no_idmap = !fm->sb || (fm->sb->s_iflags & SB_I_NOIDMAP); in fuse_get_req()
205 atomic_inc(&fc->num_waiting); in fuse_get_req()
208 err = -EINTR; in fuse_get_req()
209 if (wait_event_killable_exclusive(fc->blocked_waitq, in fuse_get_req()
211 goto out; in fuse_get_req()
216 err = -ENOTCONN; in fuse_get_req()
217 if (!fc->connected) in fuse_get_req()
218 goto out; in fuse_get_req()
220 err = -ECONNREFUSED; in fuse_get_req()
221 if (fc->conn_error) in fuse_get_req()
222 goto out; in fuse_get_req()
225 err = -ENOMEM; in fuse_get_req()
228 wake_up(&fc->blocked_waitq); in fuse_get_req()
229 goto out; in fuse_get_req()
232 req->in.h.pid = pid_nr_ns(task_pid(current), fc->pid_ns); in fuse_get_req()
234 __set_bit(FR_WAITING, &req->flags); in fuse_get_req()
236 __set_bit(FR_BACKGROUND, &req->flags); in fuse_get_req()
245 * req->in.h.{u,g}id will be equal to FUSE_INVALID_UIDGID. in fuse_get_req()
247 fsuid = no_idmap ? current_fsuid() : mapped_fsuid(idmap, fc->user_ns); in fuse_get_req()
248 fsgid = no_idmap ? current_fsgid() : mapped_fsgid(idmap, fc->user_ns); in fuse_get_req()
249 req->in.h.uid = from_kuid(fc->user_ns, fsuid); in fuse_get_req()
250 req->in.h.gid = from_kgid(fc->user_ns, fsgid); in fuse_get_req()
252 if (no_idmap && unlikely(req->in.h.uid == ((uid_t)-1) || in fuse_get_req()
253 req->in.h.gid == ((gid_t)-1))) { in fuse_get_req()
255 return ERR_PTR(-EOVERFLOW); in fuse_get_req()
260 out: in fuse_get_req()
267 struct fuse_conn *fc = req->fm->fc; in fuse_put_request()
269 if (refcount_dec_and_test(&req->count)) { in fuse_put_request()
270 if (test_bit(FR_BACKGROUND, &req->flags)) { in fuse_put_request()
275 spin_lock(&fc->bg_lock); in fuse_put_request()
276 if (!fc->blocked) in fuse_put_request()
277 wake_up(&fc->blocked_waitq); in fuse_put_request()
278 spin_unlock(&fc->bg_lock); in fuse_put_request()
281 if (test_bit(FR_WAITING, &req->flags)) { in fuse_put_request()
282 __clear_bit(FR_WAITING, &req->flags); in fuse_put_request()
304 fiq->reqctr += FUSE_REQ_ID_STEP; in fuse_get_unique_locked()
305 return fiq->reqctr; in fuse_get_unique_locked()
312 spin_lock(&fiq->lock); in fuse_get_unique()
314 spin_unlock(&fiq->lock); in fuse_get_unique()
326 * A new request is available, wake fiq->waitq
329 __releases(fiq->lock) in fuse_dev_wake_and_unlock()
331 wake_up(&fiq->waitq); in fuse_dev_wake_and_unlock()
332 kill_fasync(&fiq->fasync, SIGIO, POLL_IN); in fuse_dev_wake_and_unlock()
333 spin_unlock(&fiq->lock); in fuse_dev_wake_and_unlock()
339 spin_lock(&fiq->lock); in fuse_dev_queue_forget()
340 if (fiq->connected) { in fuse_dev_queue_forget()
341 fiq->forget_list_tail->next = forget; in fuse_dev_queue_forget()
342 fiq->forget_list_tail = forget; in fuse_dev_queue_forget()
346 spin_unlock(&fiq->lock); in fuse_dev_queue_forget()
352 spin_lock(&fiq->lock); in fuse_dev_queue_interrupt()
353 if (list_empty(&req->intr_entry)) { in fuse_dev_queue_interrupt()
354 list_add_tail(&req->intr_entry, &fiq->interrupts); in fuse_dev_queue_interrupt()
360 if (test_bit(FR_FINISHED, &req->flags)) { in fuse_dev_queue_interrupt()
361 list_del_init(&req->intr_entry); in fuse_dev_queue_interrupt()
362 spin_unlock(&fiq->lock); in fuse_dev_queue_interrupt()
367 spin_unlock(&fiq->lock); in fuse_dev_queue_interrupt()
373 spin_lock(&fiq->lock); in fuse_dev_queue_req()
374 if (fiq->connected) { in fuse_dev_queue_req()
375 if (req->in.h.opcode != FUSE_NOTIFY_REPLY) in fuse_dev_queue_req()
376 req->in.h.unique = fuse_get_unique_locked(fiq); in fuse_dev_queue_req()
377 list_add_tail(&req->list, &fiq->pending); in fuse_dev_queue_req()
380 spin_unlock(&fiq->lock); in fuse_dev_queue_req()
381 req->out.h.error = -ENOTCONN; in fuse_dev_queue_req()
382 clear_bit(FR_PENDING, &req->flags); in fuse_dev_queue_req()
396 req->in.h.len = sizeof(struct fuse_in_header) + in fuse_send_one()
397 fuse_len_args(req->args->in_numargs, in fuse_send_one()
398 (struct fuse_arg *) req->args->in_args); in fuse_send_one()
400 fiq->ops->send_req(fiq, req); in fuse_send_one()
406 struct fuse_iqueue *fiq = &fc->iq; in fuse_queue_forget()
408 forget->forget_one.nodeid = nodeid; in fuse_queue_forget()
409 forget->forget_one.nlookup = nlookup; in fuse_queue_forget()
411 fiq->ops->send_forget(fiq, forget); in fuse_queue_forget()
416 struct fuse_iqueue *fiq = &fc->iq; in flush_bg_queue()
418 while (fc->active_background < fc->max_background && in flush_bg_queue()
419 !list_empty(&fc->bg_queue)) { in flush_bg_queue()
422 req = list_first_entry(&fc->bg_queue, struct fuse_req, list); in flush_bg_queue()
423 list_del(&req->list); in flush_bg_queue()
424 fc->active_background++; in flush_bg_queue()
439 struct fuse_mount *fm = req->fm; in fuse_request_end()
440 struct fuse_conn *fc = fm->fc; in fuse_request_end()
441 struct fuse_iqueue *fiq = &fc->iq; in fuse_request_end()
443 if (test_and_set_bit(FR_FINISHED, &req->flags)) in fuse_request_end()
452 if (test_bit(FR_INTERRUPTED, &req->flags)) { in fuse_request_end()
453 spin_lock(&fiq->lock); in fuse_request_end()
454 list_del_init(&req->intr_entry); in fuse_request_end()
455 spin_unlock(&fiq->lock); in fuse_request_end()
457 WARN_ON(test_bit(FR_PENDING, &req->flags)); in fuse_request_end()
458 WARN_ON(test_bit(FR_SENT, &req->flags)); in fuse_request_end()
459 if (test_bit(FR_BACKGROUND, &req->flags)) { in fuse_request_end()
460 spin_lock(&fc->bg_lock); in fuse_request_end()
461 clear_bit(FR_BACKGROUND, &req->flags); in fuse_request_end()
462 if (fc->num_background == fc->max_background) { in fuse_request_end()
463 fc->blocked = 0; in fuse_request_end()
464 wake_up(&fc->blocked_waitq); in fuse_request_end()
465 } else if (!fc->blocked) { in fuse_request_end()
469 * fc->blocked with waiters with the wake_up() call in fuse_request_end()
472 if (waitqueue_active(&fc->blocked_waitq)) in fuse_request_end()
473 wake_up(&fc->blocked_waitq); in fuse_request_end()
476 fc->num_background--; in fuse_request_end()
477 fc->active_background--; in fuse_request_end()
479 spin_unlock(&fc->bg_lock); in fuse_request_end()
482 wake_up(&req->waitq); in fuse_request_end()
485 if (test_bit(FR_ASYNC, &req->flags)) in fuse_request_end()
486 req->args->end(fm, req->args, req->out.h.error); in fuse_request_end()
494 struct fuse_iqueue *fiq = &req->fm->fc->iq; in queue_interrupt()
497 if (unlikely(!test_bit(FR_INTERRUPTED, &req->flags))) in queue_interrupt()
498 return -EINVAL; in queue_interrupt()
500 fiq->ops->send_interrupt(fiq, req); in queue_interrupt()
508 if (test_bit(FR_PENDING, &req->flags)) { in fuse_remove_pending_req()
513 list_del(&req->list); in fuse_remove_pending_req()
516 req->out.h.error = -EINTR; in fuse_remove_pending_req()
525 struct fuse_conn *fc = req->fm->fc; in request_wait_answer()
526 struct fuse_iqueue *fiq = &fc->iq; in request_wait_answer()
529 if (!fc->no_interrupt) { in request_wait_answer()
531 err = wait_event_interruptible(req->waitq, in request_wait_answer()
532 test_bit(FR_FINISHED, &req->flags)); in request_wait_answer()
536 set_bit(FR_INTERRUPTED, &req->flags); in request_wait_answer()
539 if (test_bit(FR_SENT, &req->flags)) in request_wait_answer()
543 if (!test_bit(FR_FORCE, &req->flags)) { in request_wait_answer()
547 err = wait_event_killable(req->waitq, in request_wait_answer()
548 test_bit(FR_FINISHED, &req->flags)); in request_wait_answer()
552 if (test_bit(FR_URING, &req->flags)) in request_wait_answer()
555 removed = fuse_remove_pending_req(req, &fiq->lock); in request_wait_answer()
562 * Wait it out. in request_wait_answer()
564 wait_event(req->waitq, test_bit(FR_FINISHED, &req->flags)); in request_wait_answer()
569 struct fuse_iqueue *fiq = &req->fm->fc->iq; in __fuse_request_send()
571 BUG_ON(test_bit(FR_BACKGROUND, &req->flags)); in __fuse_request_send()
585 if (fc->minor < 4 && args->opcode == FUSE_STATFS) in fuse_adjust_compat()
586 args->out_args[0].size = FUSE_COMPAT_STATFS_SIZE; in fuse_adjust_compat()
588 if (fc->minor < 9) { in fuse_adjust_compat()
589 switch (args->opcode) { in fuse_adjust_compat()
596 args->out_args[0].size = FUSE_COMPAT_ENTRY_OUT_SIZE; in fuse_adjust_compat()
600 args->out_args[0].size = FUSE_COMPAT_ATTR_OUT_SIZE; in fuse_adjust_compat()
604 if (fc->minor < 12) { in fuse_adjust_compat()
605 switch (args->opcode) { in fuse_adjust_compat()
607 args->in_args[0].size = sizeof(struct fuse_open_in); in fuse_adjust_compat()
610 args->in_args[0].size = FUSE_COMPAT_MKNOD_IN_SIZE; in fuse_adjust_compat()
618 struct fuse_conn *fc = req->fm->fc; in fuse_force_creds()
620 if (!req->fm->sb || req->fm->sb->s_iflags & SB_I_NOIDMAP) { in fuse_force_creds()
621 req->in.h.uid = from_kuid_munged(fc->user_ns, current_fsuid()); in fuse_force_creds()
622 req->in.h.gid = from_kgid_munged(fc->user_ns, current_fsgid()); in fuse_force_creds()
624 req->in.h.uid = FUSE_INVALID_UIDGID; in fuse_force_creds()
625 req->in.h.gid = FUSE_INVALID_UIDGID; in fuse_force_creds()
628 req->in.h.pid = pid_nr_ns(task_pid(current), fc->pid_ns); in fuse_force_creds()
633 req->in.h.opcode = args->opcode; in fuse_args_to_req()
634 req->in.h.nodeid = args->nodeid; in fuse_args_to_req()
635 req->args = args; in fuse_args_to_req()
636 if (args->is_ext) in fuse_args_to_req()
637 req->in.h.total_extlen = args->in_args[args->ext_idx].size / 8; in fuse_args_to_req()
638 if (args->end) in fuse_args_to_req()
639 __set_bit(FR_ASYNC, &req->flags); in fuse_args_to_req()
646 struct fuse_conn *fc = fm->fc; in __fuse_simple_request()
650 if (args->force) { in __fuse_simple_request()
651 atomic_inc(&fc->num_waiting); in __fuse_simple_request()
654 if (!args->nocreds) in __fuse_simple_request()
657 __set_bit(FR_WAITING, &req->flags); in __fuse_simple_request()
658 __set_bit(FR_FORCE, &req->flags); in __fuse_simple_request()
660 WARN_ON(args->nocreds); in __fuse_simple_request()
666 /* Needs to be done after fuse_get_req() so that fc->minor is valid */ in __fuse_simple_request()
670 if (!args->noreply) in __fuse_simple_request()
671 __set_bit(FR_ISREPLY, &req->flags); in __fuse_simple_request()
673 ret = req->out.h.error; in __fuse_simple_request()
674 if (!ret && args->out_argvar) { in __fuse_simple_request()
675 BUG_ON(args->out_numargs == 0); in __fuse_simple_request()
676 ret = args->out_args[args->out_numargs - 1].size; in __fuse_simple_request()
687 struct fuse_iqueue *fiq = &fc->iq; in fuse_request_queue_background_uring()
689 req->in.h.unique = fuse_get_unique(fiq); in fuse_request_queue_background_uring()
690 req->in.h.len = sizeof(struct fuse_in_header) + in fuse_request_queue_background_uring()
691 fuse_len_args(req->args->in_numargs, in fuse_request_queue_background_uring()
692 (struct fuse_arg *) req->args->in_args); in fuse_request_queue_background_uring()
703 struct fuse_mount *fm = req->fm; in fuse_request_queue_background()
704 struct fuse_conn *fc = fm->fc; in fuse_request_queue_background()
707 WARN_ON(!test_bit(FR_BACKGROUND, &req->flags)); in fuse_request_queue_background()
708 if (!test_bit(FR_WAITING, &req->flags)) { in fuse_request_queue_background()
709 __set_bit(FR_WAITING, &req->flags); in fuse_request_queue_background()
710 atomic_inc(&fc->num_waiting); in fuse_request_queue_background()
712 __set_bit(FR_ISREPLY, &req->flags); in fuse_request_queue_background()
719 spin_lock(&fc->bg_lock); in fuse_request_queue_background()
720 if (likely(fc->connected)) { in fuse_request_queue_background()
721 fc->num_background++; in fuse_request_queue_background()
722 if (fc->num_background == fc->max_background) in fuse_request_queue_background()
723 fc->blocked = 1; in fuse_request_queue_background()
724 list_add_tail(&req->list, &fc->bg_queue); in fuse_request_queue_background()
728 spin_unlock(&fc->bg_lock); in fuse_request_queue_background()
738 if (args->force) { in fuse_simple_background()
739 WARN_ON(!args->nocreds); in fuse_simple_background()
742 return -ENOMEM; in fuse_simple_background()
743 __set_bit(FR_BACKGROUND, &req->flags); in fuse_simple_background()
745 WARN_ON(args->nocreds); in fuse_simple_background()
755 return -ENOTCONN; in fuse_simple_background()
766 struct fuse_iqueue *fiq = &fm->fc->iq; in fuse_simple_notify_reply()
772 __clear_bit(FR_ISREPLY, &req->flags); in fuse_simple_notify_reply()
773 req->in.h.unique = unique; in fuse_simple_notify_reply()
784 * anything that could cause a page-fault. If the request was already
785 * aborted bail out.
791 spin_lock(&req->waitq.lock); in lock_request()
792 if (test_bit(FR_ABORTED, &req->flags)) in lock_request()
793 err = -ENOENT; in lock_request()
795 set_bit(FR_LOCKED, &req->flags); in lock_request()
796 spin_unlock(&req->waitq.lock); in lock_request()
809 spin_lock(&req->waitq.lock); in unlock_request()
810 if (test_bit(FR_ABORTED, &req->flags)) in unlock_request()
811 err = -ENOENT; in unlock_request()
813 clear_bit(FR_LOCKED, &req->flags); in unlock_request()
814 spin_unlock(&req->waitq.lock); in unlock_request()
819 void fuse_copy_init(struct fuse_copy_state *cs, int write, in fuse_copy_init() argument
822 memset(cs, 0, sizeof(*cs)); in fuse_copy_init()
823 cs->write = write; in fuse_copy_init()
824 cs->iter = iter; in fuse_copy_init()
828 static void fuse_copy_finish(struct fuse_copy_state *cs) in fuse_copy_finish() argument
830 if (cs->currbuf) { in fuse_copy_finish()
831 struct pipe_buffer *buf = cs->currbuf; in fuse_copy_finish()
833 if (cs->write) in fuse_copy_finish()
834 buf->len = PAGE_SIZE - cs->len; in fuse_copy_finish()
835 cs->currbuf = NULL; in fuse_copy_finish()
836 } else if (cs->pg) { in fuse_copy_finish()
837 if (cs->write) { in fuse_copy_finish()
838 flush_dcache_page(cs->pg); in fuse_copy_finish()
839 set_page_dirty_lock(cs->pg); in fuse_copy_finish()
841 put_page(cs->pg); in fuse_copy_finish()
843 cs->pg = NULL; in fuse_copy_finish()
850 static int fuse_copy_fill(struct fuse_copy_state *cs) in fuse_copy_fill() argument
855 err = unlock_request(cs->req); in fuse_copy_fill()
859 fuse_copy_finish(cs); in fuse_copy_fill()
860 if (cs->pipebufs) { in fuse_copy_fill()
861 struct pipe_buffer *buf = cs->pipebufs; in fuse_copy_fill()
863 if (!cs->write) { in fuse_copy_fill()
864 err = pipe_buf_confirm(cs->pipe, buf); in fuse_copy_fill()
868 BUG_ON(!cs->nr_segs); in fuse_copy_fill()
869 cs->currbuf = buf; in fuse_copy_fill()
870 cs->pg = buf->page; in fuse_copy_fill()
871 cs->offset = buf->offset; in fuse_copy_fill()
872 cs->len = buf->len; in fuse_copy_fill()
873 cs->pipebufs++; in fuse_copy_fill()
874 cs->nr_segs--; in fuse_copy_fill()
876 if (cs->nr_segs >= cs->pipe->max_usage) in fuse_copy_fill()
877 return -EIO; in fuse_copy_fill()
881 return -ENOMEM; in fuse_copy_fill()
883 buf->page = page; in fuse_copy_fill()
884 buf->offset = 0; in fuse_copy_fill()
885 buf->len = 0; in fuse_copy_fill()
887 cs->currbuf = buf; in fuse_copy_fill()
888 cs->pg = page; in fuse_copy_fill()
889 cs->offset = 0; in fuse_copy_fill()
890 cs->len = PAGE_SIZE; in fuse_copy_fill()
891 cs->pipebufs++; in fuse_copy_fill()
892 cs->nr_segs++; in fuse_copy_fill()
896 err = iov_iter_get_pages2(cs->iter, &page, PAGE_SIZE, 1, &off); in fuse_copy_fill()
900 cs->len = err; in fuse_copy_fill()
901 cs->offset = off; in fuse_copy_fill()
902 cs->pg = page; in fuse_copy_fill()
905 return lock_request(cs->req); in fuse_copy_fill()
909 static int fuse_copy_do(struct fuse_copy_state *cs, void **val, unsigned *size) in fuse_copy_do() argument
911 unsigned ncpy = min(*size, cs->len); in fuse_copy_do()
913 void *pgaddr = kmap_local_page(cs->pg); in fuse_copy_do()
914 void *buf = pgaddr + cs->offset; in fuse_copy_do()
916 if (cs->write) in fuse_copy_do()
924 *size -= ncpy; in fuse_copy_do()
925 cs->len -= ncpy; in fuse_copy_do()
926 cs->offset += ncpy; in fuse_copy_do()
927 if (cs->is_uring) in fuse_copy_do()
928 cs->ring.copied_sz += ncpy; in fuse_copy_do()
936 folio->mapping != NULL || in fuse_check_folio()
937 (folio->flags & PAGE_FLAGS_CHECK_AT_PREP & in fuse_check_folio()
946 dump_page(&folio->page, "fuse: trying to steal weird page"); in fuse_check_folio()
958 static int fuse_try_move_page(struct fuse_copy_state *cs, struct page **pagep) in fuse_try_move_page() argument
963 struct pipe_buffer *buf = cs->pipebufs; in fuse_try_move_page()
966 err = unlock_request(cs->req); in fuse_try_move_page()
970 fuse_copy_finish(cs); in fuse_try_move_page()
972 err = pipe_buf_confirm(cs->pipe, buf); in fuse_try_move_page()
976 BUG_ON(!cs->nr_segs); in fuse_try_move_page()
977 cs->currbuf = buf; in fuse_try_move_page()
978 cs->len = buf->len; in fuse_try_move_page()
979 cs->pipebufs++; in fuse_try_move_page()
980 cs->nr_segs--; in fuse_try_move_page()
982 if (cs->len != PAGE_SIZE) in fuse_try_move_page()
985 if (!pipe_buf_try_steal(cs->pipe, buf)) in fuse_try_move_page()
988 newfolio = page_folio(buf->page); in fuse_try_move_page()
1014 if (!(buf->flags & PIPE_BUF_FLAG_LRU)) in fuse_try_move_page()
1021 pipe_buf_release(cs->pipe, buf); in fuse_try_move_page()
1024 spin_lock(&cs->req->waitq.lock); in fuse_try_move_page()
1025 if (test_bit(FR_ABORTED, &cs->req->flags)) in fuse_try_move_page()
1026 err = -ENOENT; in fuse_try_move_page()
1028 *pagep = &newfolio->page; in fuse_try_move_page()
1029 spin_unlock(&cs->req->waitq.lock); in fuse_try_move_page()
1038 /* Drop ref for ap->pages[] array */ in fuse_try_move_page()
1040 cs->len = 0; in fuse_try_move_page()
1051 cs->pg = buf->page; in fuse_try_move_page()
1052 cs->offset = buf->offset; in fuse_try_move_page()
1054 err = lock_request(cs->req); in fuse_try_move_page()
1061 static int fuse_ref_page(struct fuse_copy_state *cs, struct page *page, in fuse_ref_page() argument
1067 if (cs->nr_segs >= cs->pipe->max_usage) in fuse_ref_page()
1068 return -EIO; in fuse_ref_page()
1071 err = unlock_request(cs->req); in fuse_ref_page()
1077 fuse_copy_finish(cs); in fuse_ref_page()
1079 buf = cs->pipebufs; in fuse_ref_page()
1080 buf->page = page; in fuse_ref_page()
1081 buf->offset = offset; in fuse_ref_page()
1082 buf->len = count; in fuse_ref_page()
1084 cs->pipebufs++; in fuse_ref_page()
1085 cs->nr_segs++; in fuse_ref_page()
1086 cs->len = 0; in fuse_ref_page()
1095 static int fuse_copy_page(struct fuse_copy_state *cs, struct page **pagep, in fuse_copy_page() argument
1105 if (cs->write && cs->pipebufs && page) { in fuse_copy_page()
1110 if (cs->req->args->user_pages) { in fuse_copy_page()
1111 err = fuse_copy_fill(cs); in fuse_copy_page()
1115 return fuse_ref_page(cs, page, offset, count); in fuse_copy_page()
1117 } else if (!cs->len) { in fuse_copy_page()
1118 if (cs->move_pages && page && in fuse_copy_page()
1120 err = fuse_try_move_page(cs, pagep); in fuse_copy_page()
1124 err = fuse_copy_fill(cs); in fuse_copy_page()
1132 offset += fuse_copy_do(cs, &buf, &count); in fuse_copy_page()
1135 offset += fuse_copy_do(cs, NULL, &count); in fuse_copy_page()
1137 if (page && !cs->write) in fuse_copy_page()
1143 static int fuse_copy_pages(struct fuse_copy_state *cs, unsigned nbytes, in fuse_copy_pages() argument
1147 struct fuse_req *req = cs->req; in fuse_copy_pages()
1148 struct fuse_args_pages *ap = container_of(req->args, typeof(*ap), args); in fuse_copy_pages()
1150 for (i = 0; i < ap->num_folios && (nbytes || zeroing); i++) { in fuse_copy_pages()
1152 unsigned int offset = ap->descs[i].offset; in fuse_copy_pages()
1153 unsigned int count = min(nbytes, ap->descs[i].length); in fuse_copy_pages()
1156 orig = pagep = &ap->folios[i]->page; in fuse_copy_pages()
1158 err = fuse_copy_page(cs, &pagep, offset, count, zeroing); in fuse_copy_pages()
1162 nbytes -= count; in fuse_copy_pages()
1170 ap->folios[i] = page_folio(pagep); in fuse_copy_pages()
1176 static int fuse_copy_one(struct fuse_copy_state *cs, void *val, unsigned size) in fuse_copy_one() argument
1179 if (!cs->len) { in fuse_copy_one()
1180 int err = fuse_copy_fill(cs); in fuse_copy_one()
1184 fuse_copy_do(cs, &val, &size); in fuse_copy_one()
1190 int fuse_copy_args(struct fuse_copy_state *cs, unsigned numargs, in fuse_copy_args() argument
1199 if (i == numargs - 1 && argpages) in fuse_copy_args()
1200 err = fuse_copy_pages(cs, arg->size, zeroing); in fuse_copy_args()
1202 err = fuse_copy_one(cs, arg->value, arg->size); in fuse_copy_args()
1209 return fiq->forget_list_head.next != NULL; in forget_pending()
1214 return !list_empty(&fiq->pending) || !list_empty(&fiq->interrupts) || in request_pending()
1224 * Called with fiq->lock held, releases it
1227 struct fuse_copy_state *cs, in fuse_read_interrupt() argument
1229 __releases(fiq->lock) in fuse_read_interrupt()
1236 list_del_init(&req->intr_entry); in fuse_read_interrupt()
1241 ih.unique = (req->in.h.unique | FUSE_INT_REQ_BIT); in fuse_read_interrupt()
1242 arg.unique = req->in.h.unique; in fuse_read_interrupt()
1244 spin_unlock(&fiq->lock); in fuse_read_interrupt()
1246 return -EINVAL; in fuse_read_interrupt()
1248 err = fuse_copy_one(cs, &ih, sizeof(ih)); in fuse_read_interrupt()
1250 err = fuse_copy_one(cs, &arg, sizeof(arg)); in fuse_read_interrupt()
1251 fuse_copy_finish(cs); in fuse_read_interrupt()
1260 struct fuse_forget_link *head = fiq->forget_list_head.next; in fuse_dequeue_forget()
1265 newhead = &(*newhead)->next; in fuse_dequeue_forget()
1267 fiq->forget_list_head.next = *newhead; in fuse_dequeue_forget()
1269 if (fiq->forget_list_head.next == NULL) in fuse_dequeue_forget()
1270 fiq->forget_list_tail = &fiq->forget_list_head; in fuse_dequeue_forget()
1279 struct fuse_copy_state *cs, in fuse_read_single_forget() argument
1281 __releases(fiq->lock) in fuse_read_single_forget()
1286 .nlookup = forget->forget_one.nlookup, in fuse_read_single_forget()
1290 .nodeid = forget->forget_one.nodeid, in fuse_read_single_forget()
1295 spin_unlock(&fiq->lock); in fuse_read_single_forget()
1298 return -EINVAL; in fuse_read_single_forget()
1300 err = fuse_copy_one(cs, &ih, sizeof(ih)); in fuse_read_single_forget()
1302 err = fuse_copy_one(cs, &arg, sizeof(arg)); in fuse_read_single_forget()
1303 fuse_copy_finish(cs); in fuse_read_single_forget()
1312 struct fuse_copy_state *cs, size_t nbytes) in fuse_read_batch_forget() argument
1313 __releases(fiq->lock) in fuse_read_batch_forget()
1327 spin_unlock(&fiq->lock); in fuse_read_batch_forget()
1328 return -EINVAL; in fuse_read_batch_forget()
1331 max_forgets = (nbytes - ih.len) / sizeof(struct fuse_forget_one); in fuse_read_batch_forget()
1333 spin_unlock(&fiq->lock); in fuse_read_batch_forget()
1337 err = fuse_copy_one(cs, &ih, sizeof(ih)); in fuse_read_batch_forget()
1339 err = fuse_copy_one(cs, &arg, sizeof(arg)); in fuse_read_batch_forget()
1345 err = fuse_copy_one(cs, &forget->forget_one, in fuse_read_batch_forget()
1346 sizeof(forget->forget_one)); in fuse_read_batch_forget()
1348 head = forget->next; in fuse_read_batch_forget()
1352 fuse_copy_finish(cs); in fuse_read_batch_forget()
1361 struct fuse_copy_state *cs, in fuse_read_forget() argument
1363 __releases(fiq->lock) in fuse_read_forget()
1365 if (fc->minor < 16 || fiq->forget_list_head.next->next == NULL) in fuse_read_forget()
1366 return fuse_read_single_forget(fiq, cs, nbytes); in fuse_read_forget()
1368 return fuse_read_batch_forget(fiq, cs, nbytes); in fuse_read_forget()
1381 struct fuse_copy_state *cs, size_t nbytes) in fuse_dev_do_read() argument
1384 struct fuse_conn *fc = fud->fc; in fuse_dev_do_read()
1385 struct fuse_iqueue *fiq = &fc->iq; in fuse_dev_do_read()
1386 struct fuse_pqueue *fpq = &fud->pq; in fuse_dev_do_read()
1393 * Require sane minimum read buffer - that has capacity for fixed part in fuse_dev_do_read()
1407 fc->max_write)) in fuse_dev_do_read()
1408 return -EINVAL; in fuse_dev_do_read()
1412 spin_lock(&fiq->lock); in fuse_dev_do_read()
1413 if (!fiq->connected || request_pending(fiq)) in fuse_dev_do_read()
1415 spin_unlock(&fiq->lock); in fuse_dev_do_read()
1417 if (file->f_flags & O_NONBLOCK) in fuse_dev_do_read()
1418 return -EAGAIN; in fuse_dev_do_read()
1419 err = wait_event_interruptible_exclusive(fiq->waitq, in fuse_dev_do_read()
1420 !fiq->connected || request_pending(fiq)); in fuse_dev_do_read()
1425 if (!fiq->connected) { in fuse_dev_do_read()
1426 err = fc->aborted ? -ECONNABORTED : -ENODEV; in fuse_dev_do_read()
1430 if (!list_empty(&fiq->interrupts)) { in fuse_dev_do_read()
1431 req = list_entry(fiq->interrupts.next, struct fuse_req, in fuse_dev_do_read()
1433 return fuse_read_interrupt(fiq, cs, nbytes, req); in fuse_dev_do_read()
1437 if (list_empty(&fiq->pending) || fiq->forget_batch-- > 0) in fuse_dev_do_read()
1438 return fuse_read_forget(fc, fiq, cs, nbytes); in fuse_dev_do_read()
1440 if (fiq->forget_batch <= -8) in fuse_dev_do_read()
1441 fiq->forget_batch = 16; in fuse_dev_do_read()
1444 req = list_entry(fiq->pending.next, struct fuse_req, list); in fuse_dev_do_read()
1445 clear_bit(FR_PENDING, &req->flags); in fuse_dev_do_read()
1446 list_del_init(&req->list); in fuse_dev_do_read()
1447 spin_unlock(&fiq->lock); in fuse_dev_do_read()
1449 args = req->args; in fuse_dev_do_read()
1450 reqsize = req->in.h.len; in fuse_dev_do_read()
1454 req->out.h.error = -EIO; in fuse_dev_do_read()
1456 if (args->opcode == FUSE_SETXATTR) in fuse_dev_do_read()
1457 req->out.h.error = -E2BIG; in fuse_dev_do_read()
1461 spin_lock(&fpq->lock); in fuse_dev_do_read()
1463 * Must not put request on fpq->io queue after having been shut down by in fuse_dev_do_read()
1466 if (!fpq->connected) { in fuse_dev_do_read()
1467 req->out.h.error = err = -ECONNABORTED; in fuse_dev_do_read()
1471 list_add(&req->list, &fpq->io); in fuse_dev_do_read()
1472 spin_unlock(&fpq->lock); in fuse_dev_do_read()
1473 cs->req = req; in fuse_dev_do_read()
1474 err = fuse_copy_one(cs, &req->in.h, sizeof(req->in.h)); in fuse_dev_do_read()
1476 err = fuse_copy_args(cs, args->in_numargs, args->in_pages, in fuse_dev_do_read()
1477 (struct fuse_arg *) args->in_args, 0); in fuse_dev_do_read()
1478 fuse_copy_finish(cs); in fuse_dev_do_read()
1479 spin_lock(&fpq->lock); in fuse_dev_do_read()
1480 clear_bit(FR_LOCKED, &req->flags); in fuse_dev_do_read()
1481 if (!fpq->connected) { in fuse_dev_do_read()
1482 err = fc->aborted ? -ECONNABORTED : -ENODEV; in fuse_dev_do_read()
1486 req->out.h.error = -EIO; in fuse_dev_do_read()
1489 if (!test_bit(FR_ISREPLY, &req->flags)) { in fuse_dev_do_read()
1493 hash = fuse_req_hash(req->in.h.unique); in fuse_dev_do_read()
1494 list_move_tail(&req->list, &fpq->processing[hash]); in fuse_dev_do_read()
1496 set_bit(FR_SENT, &req->flags); in fuse_dev_do_read()
1497 spin_unlock(&fpq->lock); in fuse_dev_do_read()
1500 if (test_bit(FR_INTERRUPTED, &req->flags)) in fuse_dev_do_read()
1507 if (!test_bit(FR_PRIVATE, &req->flags)) in fuse_dev_do_read()
1508 list_del_init(&req->list); in fuse_dev_do_read()
1509 spin_unlock(&fpq->lock); in fuse_dev_do_read()
1514 spin_unlock(&fiq->lock); in fuse_dev_do_read()
1525 file->private_data = NULL; in fuse_dev_open()
1531 struct fuse_copy_state cs; in fuse_dev_read() local
1532 struct file *file = iocb->ki_filp; in fuse_dev_read()
1536 return -EPERM; in fuse_dev_read()
1539 return -EINVAL; in fuse_dev_read()
1541 fuse_copy_init(&cs, 1, to); in fuse_dev_read()
1543 return fuse_dev_do_read(fud, file, &cs, iov_iter_count(to)); in fuse_dev_read()
1553 struct fuse_copy_state cs; in fuse_dev_splice_read() local
1557 return -EPERM; in fuse_dev_splice_read()
1559 bufs = kvmalloc_array(pipe->max_usage, sizeof(struct pipe_buffer), in fuse_dev_splice_read()
1562 return -ENOMEM; in fuse_dev_splice_read()
1564 fuse_copy_init(&cs, 1, NULL); in fuse_dev_splice_read()
1565 cs.pipebufs = bufs; in fuse_dev_splice_read()
1566 cs.pipe = pipe; in fuse_dev_splice_read()
1567 ret = fuse_dev_do_read(fud, in, &cs, len); in fuse_dev_splice_read()
1569 goto out; in fuse_dev_splice_read()
1571 if (pipe_buf_usage(pipe) + cs.nr_segs > pipe->max_usage) { in fuse_dev_splice_read()
1572 ret = -EIO; in fuse_dev_splice_read()
1573 goto out; in fuse_dev_splice_read()
1576 for (ret = total = 0; page_nr < cs.nr_segs; total += ret) { in fuse_dev_splice_read()
1578 * Need to be careful about this. Having buf->ops in module in fuse_dev_splice_read()
1589 out: in fuse_dev_splice_read()
1590 for (; page_nr < cs.nr_segs; page_nr++) in fuse_dev_splice_read()
1598 struct fuse_copy_state *cs) in fuse_notify_poll() argument
1601 int err = -EINVAL; in fuse_notify_poll()
1606 err = fuse_copy_one(cs, &outarg, sizeof(outarg)); in fuse_notify_poll()
1610 fuse_copy_finish(cs); in fuse_notify_poll()
1614 fuse_copy_finish(cs); in fuse_notify_poll()
1619 struct fuse_copy_state *cs) in fuse_notify_inval_inode() argument
1622 int err = -EINVAL; in fuse_notify_inval_inode()
1627 err = fuse_copy_one(cs, &outarg, sizeof(outarg)); in fuse_notify_inval_inode()
1630 fuse_copy_finish(cs); in fuse_notify_inval_inode()
1632 down_read(&fc->killsb); in fuse_notify_inval_inode()
1635 up_read(&fc->killsb); in fuse_notify_inval_inode()
1639 fuse_copy_finish(cs); in fuse_notify_inval_inode()
1644 struct fuse_copy_state *cs) in fuse_notify_inval_entry() argument
1651 err = -EINVAL; in fuse_notify_inval_entry()
1655 err = fuse_copy_one(cs, &outarg, sizeof(outarg)); in fuse_notify_inval_entry()
1659 err = -ENAMETOOLONG; in fuse_notify_inval_entry()
1660 if (outarg.namelen > fc->name_max) in fuse_notify_inval_entry()
1663 err = -EINVAL; in fuse_notify_inval_entry()
1667 err = -ENOMEM; in fuse_notify_inval_entry()
1674 err = fuse_copy_one(cs, buf, outarg.namelen + 1); in fuse_notify_inval_entry()
1677 fuse_copy_finish(cs); in fuse_notify_inval_entry()
1680 down_read(&fc->killsb); in fuse_notify_inval_entry()
1682 up_read(&fc->killsb); in fuse_notify_inval_entry()
1688 fuse_copy_finish(cs); in fuse_notify_inval_entry()
1693 struct fuse_copy_state *cs) in fuse_notify_delete() argument
1700 err = -EINVAL; in fuse_notify_delete()
1704 err = fuse_copy_one(cs, &outarg, sizeof(outarg)); in fuse_notify_delete()
1708 err = -ENAMETOOLONG; in fuse_notify_delete()
1709 if (outarg.namelen > fc->name_max) in fuse_notify_delete()
1712 err = -EINVAL; in fuse_notify_delete()
1716 err = -ENOMEM; in fuse_notify_delete()
1723 err = fuse_copy_one(cs, buf, outarg.namelen + 1); in fuse_notify_delete()
1726 fuse_copy_finish(cs); in fuse_notify_delete()
1729 down_read(&fc->killsb); in fuse_notify_delete()
1731 up_read(&fc->killsb); in fuse_notify_delete()
1737 fuse_copy_finish(cs); in fuse_notify_delete()
1742 struct fuse_copy_state *cs) in fuse_notify_store() argument
1755 err = -EINVAL; in fuse_notify_store()
1759 err = fuse_copy_one(cs, &outarg, sizeof(outarg)); in fuse_notify_store()
1763 err = -EINVAL; in fuse_notify_store()
1764 if (size - sizeof(outarg) != outarg.size) in fuse_notify_store()
1769 down_read(&fc->killsb); in fuse_notify_store()
1771 err = -ENOENT; in fuse_notify_store()
1776 mapping = inode->i_mapping; in fuse_notify_store()
1797 page = &folio->page; in fuse_notify_store()
1798 this_num = min_t(unsigned, num, folio_size(folio) - offset); in fuse_notify_store()
1799 err = fuse_copy_page(cs, &page, offset, this_num, 0); in fuse_notify_store()
1811 num -= this_num; in fuse_notify_store()
1821 up_read(&fc->killsb); in fuse_notify_store()
1823 fuse_copy_finish(cs); in fuse_notify_store()
1838 release_pages(ra->ap.folios, ra->ap.num_folios); in fuse_retrieve_end()
1846 struct address_space *mapping = inode->i_mapping; in fuse_retrieve()
1853 struct fuse_conn *fc = fm->fc; in fuse_retrieve()
1859 offset = outarg->offset & ~PAGE_MASK; in fuse_retrieve()
1862 num = min(outarg->size, fc->max_write); in fuse_retrieve()
1863 if (outarg->offset > file_size) in fuse_retrieve()
1865 else if (outarg->offset + num > file_size) in fuse_retrieve()
1866 num = file_size - outarg->offset; in fuse_retrieve()
1868 num_pages = (num + offset + PAGE_SIZE - 1) >> PAGE_SHIFT; in fuse_retrieve()
1869 num_pages = min(num_pages, fc->max_pages); in fuse_retrieve()
1871 args_size += num_pages * (sizeof(ap->folios[0]) + sizeof(ap->descs[0])); in fuse_retrieve()
1875 return -ENOMEM; in fuse_retrieve()
1877 ap = &ra->ap; in fuse_retrieve()
1878 ap->folios = (void *) (ra + 1); in fuse_retrieve()
1879 ap->descs = (void *) (ap->folios + num_pages); in fuse_retrieve()
1881 args = &ap->args; in fuse_retrieve()
1882 args->nodeid = outarg->nodeid; in fuse_retrieve()
1883 args->opcode = FUSE_NOTIFY_REPLY; in fuse_retrieve()
1884 args->in_numargs = 3; in fuse_retrieve()
1885 args->in_pages = true; in fuse_retrieve()
1886 args->end = fuse_retrieve_end; in fuse_retrieve()
1888 index = outarg->offset >> PAGE_SHIFT; in fuse_retrieve()
1898 this_num = min_t(unsigned, num, PAGE_SIZE - offset); in fuse_retrieve()
1899 ap->folios[ap->num_folios] = folio; in fuse_retrieve()
1900 ap->descs[ap->num_folios].offset = offset; in fuse_retrieve()
1901 ap->descs[ap->num_folios].length = this_num; in fuse_retrieve()
1902 ap->num_folios++; in fuse_retrieve()
1906 num -= this_num; in fuse_retrieve()
1910 ra->inarg.offset = outarg->offset; in fuse_retrieve()
1911 ra->inarg.size = total_len; in fuse_retrieve()
1913 args->in_args[1].size = sizeof(ra->inarg); in fuse_retrieve()
1914 args->in_args[1].value = &ra->inarg; in fuse_retrieve()
1915 args->in_args[2].size = total_len; in fuse_retrieve()
1917 err = fuse_simple_notify_reply(fm, args, outarg->notify_unique); in fuse_retrieve()
1925 struct fuse_copy_state *cs) in fuse_notify_retrieve() argument
1933 err = -EINVAL; in fuse_notify_retrieve()
1937 err = fuse_copy_one(cs, &outarg, sizeof(outarg)); in fuse_notify_retrieve()
1941 fuse_copy_finish(cs); in fuse_notify_retrieve()
1943 down_read(&fc->killsb); in fuse_notify_retrieve()
1944 err = -ENOENT; in fuse_notify_retrieve()
1952 up_read(&fc->killsb); in fuse_notify_retrieve()
1957 fuse_copy_finish(cs); in fuse_notify_retrieve()
1972 * non-idempotent requests.
1978 struct fuse_iqueue *fiq = &fc->iq; in fuse_resend()
1982 spin_lock(&fc->lock); in fuse_resend()
1983 if (!fc->connected) { in fuse_resend()
1984 spin_unlock(&fc->lock); in fuse_resend()
1988 list_for_each_entry(fud, &fc->devices, entry) { in fuse_resend()
1989 struct fuse_pqueue *fpq = &fud->pq; in fuse_resend()
1991 spin_lock(&fpq->lock); in fuse_resend()
1993 list_splice_tail_init(&fpq->processing[i], &to_queue); in fuse_resend()
1994 spin_unlock(&fpq->lock); in fuse_resend()
1996 spin_unlock(&fc->lock); in fuse_resend()
1999 set_bit(FR_PENDING, &req->flags); in fuse_resend()
2000 clear_bit(FR_SENT, &req->flags); in fuse_resend()
2002 req->in.h.unique |= FUSE_UNIQUE_RESEND; in fuse_resend()
2005 spin_lock(&fiq->lock); in fuse_resend()
2006 if (!fiq->connected) { in fuse_resend()
2007 spin_unlock(&fiq->lock); in fuse_resend()
2009 clear_bit(FR_PENDING, &req->flags); in fuse_resend()
2014 list_splice(&to_queue, &fiq->pending); in fuse_resend()
2025 unsigned int size, struct fuse_copy_state *cs) in fuse_notify() argument
2028 cs->move_pages = 0; in fuse_notify()
2032 return fuse_notify_poll(fc, size, cs); in fuse_notify()
2035 return fuse_notify_inval_inode(fc, size, cs); in fuse_notify()
2038 return fuse_notify_inval_entry(fc, size, cs); in fuse_notify()
2041 return fuse_notify_store(fc, size, cs); in fuse_notify()
2044 return fuse_notify_retrieve(fc, size, cs); in fuse_notify()
2047 return fuse_notify_delete(fc, size, cs); in fuse_notify()
2053 fuse_copy_finish(cs); in fuse_notify()
2054 return -EINVAL; in fuse_notify()
2064 list_for_each_entry(req, &fpq->processing[hash], list) { in fuse_request_find()
2065 if (req->in.h.unique == unique) in fuse_request_find()
2071 int fuse_copy_out_args(struct fuse_copy_state *cs, struct fuse_args *args, in fuse_copy_out_args() argument
2078 * Uring has all headers separated from args - args is payload only in fuse_copy_out_args()
2080 if (!cs->is_uring) in fuse_copy_out_args()
2083 reqsize += fuse_len_args(args->out_numargs, args->out_args); in fuse_copy_out_args()
2085 if (reqsize < nbytes || (reqsize > nbytes && !args->out_argvar)) in fuse_copy_out_args()
2086 return -EINVAL; in fuse_copy_out_args()
2088 struct fuse_arg *lastarg = &args->out_args[args->out_numargs-1]; in fuse_copy_out_args()
2089 unsigned diffsize = reqsize - nbytes; in fuse_copy_out_args()
2091 if (diffsize > lastarg->size) in fuse_copy_out_args()
2092 return -EINVAL; in fuse_copy_out_args()
2093 lastarg->size -= diffsize; in fuse_copy_out_args()
2095 return fuse_copy_args(cs, args->out_numargs, args->out_pages, in fuse_copy_out_args()
2096 args->out_args, args->page_zeroing); in fuse_copy_out_args()
2107 struct fuse_copy_state *cs, size_t nbytes) in fuse_dev_do_write() argument
2110 struct fuse_conn *fc = fud->fc; in fuse_dev_do_write()
2111 struct fuse_pqueue *fpq = &fud->pq; in fuse_dev_do_write()
2115 err = -EINVAL; in fuse_dev_do_write()
2117 goto out; in fuse_dev_do_write()
2119 err = fuse_copy_one(cs, &oh, sizeof(oh)); in fuse_dev_do_write()
2123 err = -EINVAL; in fuse_dev_do_write()
2132 err = fuse_notify(fc, oh.error, nbytes - sizeof(oh), cs); in fuse_dev_do_write()
2133 goto out; in fuse_dev_do_write()
2136 err = -EINVAL; in fuse_dev_do_write()
2137 if (oh.error <= -512 || oh.error > 0) in fuse_dev_do_write()
2140 spin_lock(&fpq->lock); in fuse_dev_do_write()
2142 if (fpq->connected) in fuse_dev_do_write()
2145 err = -ENOENT; in fuse_dev_do_write()
2147 spin_unlock(&fpq->lock); in fuse_dev_do_write()
2154 spin_unlock(&fpq->lock); in fuse_dev_do_write()
2158 err = -EINVAL; in fuse_dev_do_write()
2159 else if (oh.error == -ENOSYS) in fuse_dev_do_write()
2160 fc->no_interrupt = 1; in fuse_dev_do_write()
2161 else if (oh.error == -EAGAIN) in fuse_dev_do_write()
2169 clear_bit(FR_SENT, &req->flags); in fuse_dev_do_write()
2170 list_move(&req->list, &fpq->io); in fuse_dev_do_write()
2171 req->out.h = oh; in fuse_dev_do_write()
2172 set_bit(FR_LOCKED, &req->flags); in fuse_dev_do_write()
2173 spin_unlock(&fpq->lock); in fuse_dev_do_write()
2174 cs->req = req; in fuse_dev_do_write()
2175 if (!req->args->page_replace) in fuse_dev_do_write()
2176 cs->move_pages = 0; in fuse_dev_do_write()
2179 err = nbytes != sizeof(oh) ? -EINVAL : 0; in fuse_dev_do_write()
2181 err = fuse_copy_out_args(cs, req->args, nbytes); in fuse_dev_do_write()
2182 fuse_copy_finish(cs); in fuse_dev_do_write()
2184 spin_lock(&fpq->lock); in fuse_dev_do_write()
2185 clear_bit(FR_LOCKED, &req->flags); in fuse_dev_do_write()
2186 if (!fpq->connected) in fuse_dev_do_write()
2187 err = -ENOENT; in fuse_dev_do_write()
2189 req->out.h.error = -EIO; in fuse_dev_do_write()
2190 if (!test_bit(FR_PRIVATE, &req->flags)) in fuse_dev_do_write()
2191 list_del_init(&req->list); in fuse_dev_do_write()
2192 spin_unlock(&fpq->lock); in fuse_dev_do_write()
2195 out: in fuse_dev_do_write()
2199 fuse_copy_finish(cs); in fuse_dev_do_write()
2200 goto out; in fuse_dev_do_write()
2205 struct fuse_copy_state cs; in fuse_dev_write() local
2206 struct fuse_dev *fud = fuse_get_dev(iocb->ki_filp); in fuse_dev_write()
2209 return -EPERM; in fuse_dev_write()
2212 return -EINVAL; in fuse_dev_write()
2214 fuse_copy_init(&cs, 0, from); in fuse_dev_write()
2216 return fuse_dev_do_write(fud, &cs, iov_iter_count(from)); in fuse_dev_write()
2220 struct file *out, loff_t *ppos, in fuse_dev_splice_write() argument
2227 struct fuse_copy_state cs; in fuse_dev_splice_write() local
2232 fud = fuse_get_dev(out); in fuse_dev_splice_write()
2234 return -EPERM; in fuse_dev_splice_write()
2238 head = pipe->head; in fuse_dev_splice_write()
2239 tail = pipe->tail; in fuse_dev_splice_write()
2245 return -ENOMEM; in fuse_dev_splice_write()
2251 rem += pipe_buf(pipe, idx)->len; in fuse_dev_splice_write()
2253 ret = -EINVAL; in fuse_dev_splice_write()
2268 if (rem >= ibuf->len) { in fuse_dev_splice_write()
2270 ibuf->ops = NULL; in fuse_dev_splice_write()
2272 pipe->tail = tail; in fuse_dev_splice_write()
2278 obuf->flags &= ~PIPE_BUF_FLAG_GIFT; in fuse_dev_splice_write()
2279 obuf->len = rem; in fuse_dev_splice_write()
2280 ibuf->offset += obuf->len; in fuse_dev_splice_write()
2281 ibuf->len -= obuf->len; in fuse_dev_splice_write()
2284 rem -= obuf->len; in fuse_dev_splice_write()
2288 fuse_copy_init(&cs, 0, NULL); in fuse_dev_splice_write()
2289 cs.pipebufs = bufs; in fuse_dev_splice_write()
2290 cs.nr_segs = nbuf; in fuse_dev_splice_write()
2291 cs.pipe = pipe; in fuse_dev_splice_write()
2294 cs.move_pages = 1; in fuse_dev_splice_write()
2296 ret = fuse_dev_do_write(fud, &cs, len); in fuse_dev_splice_write()
2303 if (buf->ops) in fuse_dev_splice_write()
2321 fiq = &fud->fc->iq; in fuse_dev_poll()
2322 poll_wait(file, &fiq->waitq, wait); in fuse_dev_poll()
2324 spin_lock(&fiq->lock); in fuse_dev_poll()
2325 if (!fiq->connected) in fuse_dev_poll()
2329 spin_unlock(&fiq->lock); in fuse_dev_poll()
2339 req = list_entry(head->next, struct fuse_req, list); in fuse_dev_end_requests()
2340 req->out.h.error = -ECONNABORTED; in fuse_dev_end_requests()
2341 clear_bit(FR_SENT, &req->flags); in fuse_dev_end_requests()
2342 list_del_init(&req->list); in fuse_dev_end_requests()
2351 p = rb_first(&fc->polled_files); in end_polls()
2356 wake_up_interruptible_all(&ff->poll_wait); in end_polls()
2373 * Aborting requests under I/O goes as follows: 1: Separate out unlocked
2382 struct fuse_iqueue *fiq = &fc->iq; in fuse_abort_conn()
2384 spin_lock(&fc->lock); in fuse_abort_conn()
2385 if (fc->connected) { in fuse_abort_conn()
2391 if (fc->timeout.req_timeout) in fuse_abort_conn()
2392 cancel_delayed_work(&fc->timeout.work); in fuse_abort_conn()
2394 /* Background queuing checks fc->connected under bg_lock */ in fuse_abort_conn()
2395 spin_lock(&fc->bg_lock); in fuse_abort_conn()
2396 fc->connected = 0; in fuse_abort_conn()
2397 spin_unlock(&fc->bg_lock); in fuse_abort_conn()
2400 list_for_each_entry(fud, &fc->devices, entry) { in fuse_abort_conn()
2401 struct fuse_pqueue *fpq = &fud->pq; in fuse_abort_conn()
2403 spin_lock(&fpq->lock); in fuse_abort_conn()
2404 fpq->connected = 0; in fuse_abort_conn()
2405 list_for_each_entry_safe(req, next, &fpq->io, list) { in fuse_abort_conn()
2406 req->out.h.error = -ECONNABORTED; in fuse_abort_conn()
2407 spin_lock(&req->waitq.lock); in fuse_abort_conn()
2408 set_bit(FR_ABORTED, &req->flags); in fuse_abort_conn()
2409 if (!test_bit(FR_LOCKED, &req->flags)) { in fuse_abort_conn()
2410 set_bit(FR_PRIVATE, &req->flags); in fuse_abort_conn()
2412 list_move(&req->list, &to_end); in fuse_abort_conn()
2414 spin_unlock(&req->waitq.lock); in fuse_abort_conn()
2417 list_splice_tail_init(&fpq->processing[i], in fuse_abort_conn()
2419 spin_unlock(&fpq->lock); in fuse_abort_conn()
2421 spin_lock(&fc->bg_lock); in fuse_abort_conn()
2422 fc->blocked = 0; in fuse_abort_conn()
2423 fc->max_background = UINT_MAX; in fuse_abort_conn()
2425 spin_unlock(&fc->bg_lock); in fuse_abort_conn()
2427 spin_lock(&fiq->lock); in fuse_abort_conn()
2428 fiq->connected = 0; in fuse_abort_conn()
2429 list_for_each_entry(req, &fiq->pending, list) in fuse_abort_conn()
2430 clear_bit(FR_PENDING, &req->flags); in fuse_abort_conn()
2431 list_splice_tail_init(&fiq->pending, &to_end); in fuse_abort_conn()
2434 wake_up_all(&fiq->waitq); in fuse_abort_conn()
2435 spin_unlock(&fiq->lock); in fuse_abort_conn()
2436 kill_fasync(&fiq->fasync, SIGIO, POLL_IN); in fuse_abort_conn()
2438 wake_up_all(&fc->blocked_waitq); in fuse_abort_conn()
2439 spin_unlock(&fc->lock); in fuse_abort_conn()
2444 * fc->lock must not be taken to avoid conflicts with io-uring in fuse_abort_conn()
2449 spin_unlock(&fc->lock); in fuse_abort_conn()
2458 wait_event(fc->blocked_waitq, atomic_read(&fc->num_waiting) == 0); in fuse_wait_aborted()
2468 struct fuse_conn *fc = fud->fc; in fuse_dev_release()
2469 struct fuse_pqueue *fpq = &fud->pq; in fuse_dev_release()
2473 spin_lock(&fpq->lock); in fuse_dev_release()
2474 WARN_ON(!list_empty(&fpq->io)); in fuse_dev_release()
2476 list_splice_init(&fpq->processing[i], &to_end); in fuse_dev_release()
2477 spin_unlock(&fpq->lock); in fuse_dev_release()
2482 if (atomic_dec_and_test(&fc->dev_count)) { in fuse_dev_release()
2483 WARN_ON(fc->iq.fasync != NULL); in fuse_dev_release()
2497 return -EPERM; in fuse_dev_fasync()
2499 /* No locking - fasync_helper does its own locking */ in fuse_dev_fasync()
2500 return fasync_helper(fd, file, on, &fud->fc->iq.fasync); in fuse_dev_fasync()
2507 if (new->private_data) in fuse_device_clone()
2508 return -EINVAL; in fuse_device_clone()
2512 return -ENOMEM; in fuse_device_clone()
2514 new->private_data = fud; in fuse_device_clone()
2515 atomic_inc(&fc->dev_count); in fuse_device_clone()
2527 return -EFAULT; in fuse_dev_ioctl_clone()
2531 return -EINVAL; in fuse_dev_ioctl_clone()
2534 * Check against file->f_op because CUSE in fuse_dev_ioctl_clone()
2537 if (fd_file(f)->f_op == file->f_op) in fuse_dev_ioctl_clone()
2540 res = -EINVAL; in fuse_dev_ioctl_clone()
2543 res = fuse_device_clone(fud->fc, file); in fuse_dev_ioctl_clone()
2557 return -EPERM; in fuse_dev_ioctl_backing_open()
2560 return -EOPNOTSUPP; in fuse_dev_ioctl_backing_open()
2563 return -EFAULT; in fuse_dev_ioctl_backing_open()
2565 return fuse_backing_open(fud->fc, &map); in fuse_dev_ioctl_backing_open()
2574 return -EPERM; in fuse_dev_ioctl_backing_close()
2577 return -EOPNOTSUPP; in fuse_dev_ioctl_backing_close()
2580 return -EFAULT; in fuse_dev_ioctl_backing_close()
2582 return fuse_backing_close(fud->fc, backing_id); in fuse_dev_ioctl_backing_close()
2601 return -ENOTTY; in fuse_dev_ioctl()
2631 int err = -ENOMEM; in fuse_dev_init()
2636 goto out; in fuse_dev_init()
2646 out: in fuse_dev_init()