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Member "fuse-3.2.3/include/cuse_lowlevel.h" (11 May 2018, 2573 Bytes) of package /linux/misc/fuse-3.2.3.tar.xz:


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    1 /*
    2   CUSE: Character device in Userspace
    3   Copyright (C) 2008-2009  SUSE Linux Products GmbH
    4   Copyright (C) 2008-2009  Tejun Heo <tj@kernel.org>
    5 
    6   This program can be distributed under the terms of the GNU LGPLv2.
    7   See the file COPYING.LIB.
    8 
    9   Read example/cusexmp.c for usages.
   10 */
   11 
   12 #ifndef CUSE_LOWLEVEL_H_
   13 #define CUSE_LOWLEVEL_H_
   14 
   15 #ifndef FUSE_USE_VERSION
   16 #define FUSE_USE_VERSION 29
   17 #endif
   18 
   19 #include "fuse_lowlevel.h"
   20 
   21 #include <fcntl.h>
   22 #include <sys/types.h>
   23 #include <sys/uio.h>
   24 
   25 #ifdef __cplusplus
   26 extern "C" {
   27 #endif
   28 
   29 #define CUSE_UNRESTRICTED_IOCTL     (1 << 0) /* use unrestricted ioctl */
   30 
   31 struct fuse_session;
   32 
   33 struct cuse_info {
   34     unsigned    dev_major;
   35     unsigned    dev_minor;
   36     unsigned    dev_info_argc;
   37     const char  **dev_info_argv;
   38     unsigned    flags;
   39 };
   40 
   41 /*
   42  * Most ops behave almost identically to the matching fuse_lowlevel
   43  * ops except that they don't take @ino.
   44  *
   45  * init_done    : called after initialization is complete
   46  * read/write   : always direct IO, simultaneous operations allowed
   47  * ioctl    : might be in unrestricted mode depending on ci->flags
   48  */
   49 struct cuse_lowlevel_ops {
   50     void (*init) (void *userdata, struct fuse_conn_info *conn);
   51     void (*init_done) (void *userdata);
   52     void (*destroy) (void *userdata);
   53     void (*open) (fuse_req_t req, struct fuse_file_info *fi);
   54     void (*read) (fuse_req_t req, size_t size, off_t off,
   55               struct fuse_file_info *fi);
   56     void (*write) (fuse_req_t req, const char *buf, size_t size, off_t off,
   57                struct fuse_file_info *fi);
   58     void (*flush) (fuse_req_t req, struct fuse_file_info *fi);
   59     void (*release) (fuse_req_t req, struct fuse_file_info *fi);
   60     void (*fsync) (fuse_req_t req, int datasync, struct fuse_file_info *fi);
   61     void (*ioctl) (fuse_req_t req, int cmd, void *arg,
   62                struct fuse_file_info *fi, unsigned int flags,
   63                const void *in_buf, size_t in_bufsz, size_t out_bufsz);
   64     void (*poll) (fuse_req_t req, struct fuse_file_info *fi,
   65               struct fuse_pollhandle *ph);
   66 };
   67 
   68 struct fuse_session *cuse_lowlevel_new(struct fuse_args *args,
   69                        const struct cuse_info *ci,
   70                        const struct cuse_lowlevel_ops *clop,
   71                        void *userdata);
   72 
   73 struct fuse_session *cuse_lowlevel_setup(int argc, char *argv[],
   74                      const struct cuse_info *ci,
   75                      const struct cuse_lowlevel_ops *clop,
   76                      int *multithreaded, void *userdata);
   77 
   78 void cuse_lowlevel_teardown(struct fuse_session *se);
   79 
   80 int cuse_lowlevel_main(int argc, char *argv[], const struct cuse_info *ci,
   81                const struct cuse_lowlevel_ops *clop, void *userdata);
   82 
   83 #ifdef __cplusplus
   84 }
   85 #endif
   86 
   87 #endif /* CUSE_LOWLEVEL_H_ */