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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _FS_FUSE_DEV_H#define _FS_FUSE_DEV_H
#include <linux/cleanup.h>
/** Maximum number of outstanding background requests */#define FUSE_DEFAULT_MAX_BACKGROUND 12
struct fuse_conn;struct fuse_chan;struct fuse_dev;struct fuse_args;struct fuse_copy_state;struct fuse_backing_map;struct file;struct folio;enum fuse_notify_code;
struct fuse_chan_param { unsigned int minor; unsigned int max_write; unsigned int max_pages;};
struct fuse_chan *fuse_chan_new(void);struct fuse_chan *fuse_dev_chan_new(void);void fuse_chan_release(struct fuse_chan *fch);void fuse_chan_free(struct fuse_chan *fch);unsigned int fuse_chan_num_background(struct fuse_chan *fch);unsigned int fuse_chan_max_background(struct fuse_chan *fch);void fuse_chan_max_background_set(struct fuse_chan *fch, unsigned int val);unsigned int fuse_chan_num_waiting(struct fuse_chan *fch);void fuse_chan_set_fc(struct fuse_chan *fch, struct fuse_conn *fc);void fuse_chan_set_initialized(struct fuse_chan *fch, struct fuse_chan_param *param);void fuse_chan_io_uring_enable(struct fuse_chan *fch);ssize_t fuse_chan_send(struct fuse_chan *fch, struct fuse_args *args);int fuse_chan_send_bg(struct fuse_chan *fch, struct fuse_args *args, gfp_t gfp_flags);int fuse_chan_send_notify_reply(struct fuse_chan *fch, struct fuse_args *args, u64 unique);void fuse_chan_resend(struct fuse_chan *fch);
struct fuse_forget_link *fuse_alloc_forget(void);void fuse_chan_queue_forget(struct fuse_chan *fch, struct fuse_forget_link *forget, u64 nodeid, u64 nlookup);
DEFINE_FREE(fuse_chan_free, struct fuse_chan *, if (_T) fuse_chan_free(_T))
/** * Initialize the client device */int fuse_dev_init(void);
/** * Cleanup the client device */void fuse_dev_cleanup(void);
void fuse_dev_install(struct fuse_dev *fud, struct fuse_chan *fch);bool fuse_dev_verify(struct fuse_dev *fud, struct fuse_chan *fch);void fuse_dev_put(struct fuse_dev *fud);bool fuse_dev_is_installed(struct fuse_dev *fud);bool fuse_dev_is_sync_init(struct fuse_dev *fud);struct fuse_dev *fuse_dev_grab(struct file *file);
void fuse_init_server_timeout(struct fuse_chan *fch, unsigned int timeout);
/* Abort all requests */void fuse_chan_abort(struct fuse_chan *fch, bool abort_with_err);void fuse_chan_wait_aborted(struct fuse_chan *fch);
/** * Acquire reference to fuse_conn */struct fuse_conn *fuse_conn_get(struct fuse_conn *fc);
/** * Release reference to fuse_conn */void fuse_conn_put(struct fuse_conn *fc);
dev_t fuse_conn_get_id(struct fuse_conn *fc);
void fuse_end_polls(struct fuse_conn *fc);int fuse_notify(struct fuse_conn *fc, enum fuse_notify_code code, unsigned int size, struct fuse_copy_state *cs);
int fuse_backing_open(struct fuse_conn *fc, struct fuse_backing_map *map);int fuse_backing_close(struct fuse_conn *fc, int backing_id);
int fuse_copy_one(struct fuse_copy_state *cs, void *val, unsigned size);int fuse_copy_folio(struct fuse_copy_state *cs, struct folio **foliop, unsigned offset, unsigned count, int zeroing);void fuse_copy_finish(struct fuse_copy_state *cs);
#ifdef CONFIG_FUSE_IO_URINGbool fuse_uring_enabled(void);void fuse_uring_destruct(struct fuse_chan *fch);#else /* CONFIG_FUSE_IO_URING */static inline bool fuse_uring_enabled(void){ return false;}
static inline void fuse_uring_destruct(struct fuse_chan *fch){}#endif /* CONFIG_FUSE_IO_URING */
#endif /* _FS_FUSE_DEV_H */