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/*
FUSE: Filesystem in Userspace
Copyright (C) 2001-2007 Miklos Szeredi <miklos@szeredi.hu>
This program can be distributed under the terms of the GNU LGPLv2.
See the file COPYING.LIB
*/
#include "fuse.h"
#include "fuse_lowlevel.h"
struct fuse_chan;
struct fuse_ll;
/**
* Channel operations
*
* This is used in channel creation
*/
struct fuse_chan_ops {
/**
* Hook for receiving a raw request
*
* @param ch pointer to the channel
* @param buf the buffer to store the request in
* @param size the size of the buffer
* @return the actual size of the raw request, or -1 on error
*/
int (*receive)(struct fuse_chan **chp, char *buf, size_t size);
/**
* Hook for sending a raw reply
*
* A return value of -ENOENT means, that the request was
* interrupted, and the reply was discarded
*
* @param ch the channel
* @param iov vector of blocks
* @param count the number of blocks in vector
* @return zero on success, -errno on failure
*/
int (*send)(struct fuse_chan *ch, const struct iovec iov[],
size_t count);
/**
* Destroy the channel
*
* @param ch the channel
*/
void (*destroy)(struct fuse_chan *ch);
};
struct fuse_session {
int (*receive_buf)(struct fuse_session *se, struct fuse_buf *buf,
struct fuse_chan **chp);
void (*process_buf)(void *data, const struct fuse_buf *buf,
struct fuse_chan *ch);
void (*destroy) (void *data);
void *data;
volatile int exited;
struct fuse_chan *ch;
};
struct fuse_req {
struct fuse_ll *f;
uint64_t unique;
int ctr;
pthread_mutex_t lock;
struct fuse_ctx ctx;
struct fuse_chan *ch;
int interrupted;
unsigned int ioctl_64bit : 1;
union {
struct {
uint64_t unique;
} i;
struct {
fuse_interrupt_func_t func;
void *data;
} ni;
} u;
struct fuse_req *next;
struct fuse_req *prev;
};
struct fuse_notify_req {
uint64_t unique;
void (*reply)(struct fuse_notify_req *, fuse_req_t, fuse_ino_t,
const void *, const struct fuse_buf *);
struct fuse_notify_req *next;
struct fuse_notify_req *prev;
};
struct fuse_ll {
int debug;
int allow_root;
int atomic_o_trunc;
int no_remote_posix_lock;
int no_remote_flock;
int big_writes;
int splice_write;
int splice_move;
int splice_read;
int no_splice_write;
int no_splice_move;
int no_splice_read;
int auto_inval_data;
int no_auto_inval_data;
int no_readdirplus;
int no_readdirplus_auto;
struct fuse_lowlevel_ops op;
int got_init;
struct cuse_data *cuse_data;
void *userdata;
uid_t owner;
struct fuse_conn_info conn;
struct fuse_req list;
struct fuse_req interrupts;
pthread_mutex_t lock;
int got_destroy;
pthread_key_t pipe_key;
int broken_splice_nonblock;
uint64_t notify_ctr;
struct fuse_notify_req notify_list;
};
struct fuse_chan *fuse_kern_chan_new(int fd);
int fuse_chan_clearfd(struct fuse_chan *ch);
/**
* Create a new session
*
* @param data user data
* @return new session object, or NULL on failure
*/
struct fuse_session *fuse_session_new(void *data);
/**
* Get the user data provided to the session
*
* @param se the session
* @return the user data
*/
void *fuse_session_data(struct fuse_session *se);
/**
* Create a new channel
*
* @param op channel operations
* @param fd file descriptor of the channel
* @param bufsize the minimal receive buffer size
* @return the new channel object, or NULL on failure
*/
struct fuse_chan *fuse_chan_new(struct fuse_chan_ops *op, int fd,
size_t bufsize);
/**
* Query the session to which this channel is assigned
*
* @param ch the channel
* @return the session, or NULL if the channel is not assigned
*/
struct fuse_session *fuse_chan_session(struct fuse_chan *ch);
/**
* Send a raw reply
*
* A return value of -ENOENT means, that the request was
* interrupted, and the reply was discarded
*
* @param ch the channel
* @param iov vector of blocks
* @param count the number of blocks in vector
* @return zero on success, -errno on failure
*/
int fuse_chan_send(struct fuse_chan *ch, const struct iovec iov[],
size_t count);
/**
* Receive a raw request
*
* A return value of -ENODEV means, that the filesystem was unmounted
*
* @param ch pointer to the channel
* @param buf the buffer to store the request in
* @param size the size of the buffer
* @return the actual size of the raw request, or -errno on error
*/
int fuse_chan_recv(struct fuse_chan **ch, char *buf, size_t size);
void fuse_kern_unmount(const char *mountpoint, int fd);
int fuse_kern_mount(const char *mountpoint, struct fuse_args *args);
int fuse_send_reply_iov_nofree(fuse_req_t req, int error, struct iovec *iov,
int count);
void fuse_free_req(fuse_req_t req);
void cuse_lowlevel_init(fuse_req_t req, fuse_ino_t nodeide, const void *inarg);
int fuse_start_thread(pthread_t *thread_id, void *(*func)(void *), void *arg);
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