tools/virtiofsd/fuse_i.h

   1 /*
   2  * FUSE: Filesystem in Userspace
   3  * Copyright (C) 2001-2007  Miklos Szeredi <miklos@szeredi.hu>
   4  *
   5  * This program can be distributed under the terms of the GNU LGPLv2.
   6  * See the file COPYING.LIB
   7  */
   8
   9 #ifndef FUSE_I_H
  10 #define FUSE_I_H
  11
  12 #define FUSE_USE_VERSION 31
  13 #include "fuse.h"
  14 #include "fuse_lowlevel.h"
  15
  16 struct fv_VuDev;
  17 struct fv_QueueInfo;
  18
  19 struct fuse_req {
  20     struct fuse_session *se;
  21     uint64_t unique;
  22     int ctr;
  23     pthread_mutex_t lock;
  24     struct fuse_ctx ctx;
  25     struct fuse_chan *ch;
  26     int interrupted;
  27     unsigned int ioctl_64bit:1;
  28     union {
  29         struct {
  30             uint64_t unique;
  31         } i;
  32         struct {
  33             fuse_interrupt_func_t func;
  34             void *data;
  35         } ni;
  36     } u;
  37     struct fuse_req *next;
  38     struct fuse_req *prev;
  39 };
  40
  41 struct fuse_notify_req {
  42     uint64_t unique;
  43     void (*reply)(struct fuse_notify_req *, fuse_req_t, fuse_ino_t,
  44                   const void *, const struct fuse_buf *);
  45     struct fuse_notify_req *next;
  46     struct fuse_notify_req *prev;
  47 };
  48
  49 struct fuse_session {
  50     char *mountpoint;
  51     volatile int exited;
  52     int fd;
  53     int debug;
  54     int deny_others;
  55     struct fuse_lowlevel_ops op;
  56     int got_init;
  57     struct cuse_data *cuse_data;
  58     void *userdata;
  59     uid_t owner;
  60     struct fuse_conn_info conn;
  61     struct fuse_req list;
  62     struct fuse_req interrupts;
  63     pthread_mutex_t lock;
  64     int got_destroy;
  65     int broken_splice_nonblock;
  66     uint64_t notify_ctr;
  67     struct fuse_notify_req notify_list;
  68     size_t bufsize;
  69     int error;
  70     char *vu_socket_path;
  71     int   vu_listen_fd;
  72     int   vu_socketfd;
  73     struct fv_VuDev *virtio_dev;
  74 };
  75
  76 struct fuse_chan {
  77     pthread_mutex_t lock;
  78     int ctr;
  79     int fd;
  80     struct fv_QueueInfo *qi;
  81 };
  82
  83 /**
  84  * Filesystem module
  85  *
  86  * Filesystem modules are registered with the FUSE_REGISTER_MODULE()
  87  * macro.
  88  *
  89  */
  90 struct fuse_module {
  91     char *name;
  92     fuse_module_factory_t factory;
  93     struct fuse_module *next;
  94     struct fusemod_so *so;
  95     int ctr;
  96 };
  97
  98 int fuse_send_reply_iov_nofree(fuse_req_t req, int error, struct iovec *iov,
  99                                int count);
 100 void fuse_free_req(fuse_req_t req);
 101
 102 void fuse_session_process_buf_int(struct fuse_session *se,
 103                                   const struct fuse_buf *buf,
 104                                   struct fuse_chan *ch);
 105
 106
 107 #define FUSE_MAX_MAX_PAGES 256
 108 #define FUSE_DEFAULT_MAX_PAGES_PER_REQ 32
 109
 110 /* room needed in buffer to accommodate header */
 111 #define FUSE_BUFFER_HEADER_SIZE 0x1000
 112
 113 #endif