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_lowlevel.h"
  14
  15 struct fv_VuDev;
  16 struct fv_QueueInfo;
  17
  18 struct fuse_req {
  19     struct fuse_session *se;
  20     uint64_t unique;
  21     int ctr;
  22     pthread_mutex_t lock;
  23     struct fuse_ctx ctx;
  24     struct fuse_chan *ch;
  25     int interrupted;
  26     unsigned int ioctl_64bit:1;
  27     union {
  28         struct {
  29             uint64_t unique;
  30         } i;
  31         struct {
  32             fuse_interrupt_func_t func;
  33             void *data;
  34         } ni;
  35     } u;
  36     struct fuse_req *next;
  37     struct fuse_req *prev;
  38 };
  39
  40 struct fuse_notify_req {
  41     uint64_t unique;
  42     void (*reply)(struct fuse_notify_req *, fuse_req_t, fuse_ino_t,
  43                   const void *, const struct fuse_buf *);
  44     struct fuse_notify_req *next;
  45     struct fuse_notify_req *prev;
  46 };
  47
  48 struct fuse_session {
  49     char *mountpoint;
  50     volatile int exited;
  51     int fd;
  52     int debug;
  53     int deny_others;
  54     struct fuse_lowlevel_ops op;
  55     int got_init;
  56     struct cuse_data *cuse_data;
  57     void *userdata;
  58     uid_t owner;
  59     struct fuse_conn_info conn;
  60     struct fuse_req list;
  61     struct fuse_req interrupts;
  62     pthread_mutex_t lock;
  63     pthread_rwlock_t init_rwlock;
  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     int thread_pool_size;
  75 };
  76
  77 struct fuse_chan {
  78     pthread_mutex_t lock;
  79     int ctr;
  80     int fd;
  81     struct fv_QueueInfo *qi;
  82 };
  83
  84 int fuse_send_reply_iov_nofree(fuse_req_t req, int error, struct iovec *iov,
  85                                int count);
  86 void fuse_free_req(fuse_req_t req);
  87
  88 void fuse_session_process_buf_int(struct fuse_session *se,
  89                                   struct fuse_bufvec *bufv,
  90                                   struct fuse_chan *ch);
  91
  92
  93 #define FUSE_MAX_MAX_PAGES 256
  94 #define FUSE_DEFAULT_MAX_PAGES_PER_REQ 32
  95
  96 /* room needed in buffer to accommodate header */
  97 #define FUSE_BUFFER_HEADER_SIZE 0x1000
  98
  99 #endif