LXR qemu/tools/virtiofsd/fuse

   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
  15struct fv_VuDev;
  16struct fv_QueueInfo;
  17
  18struct 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
  40struct 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
  48struct 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    char *vu_socket_group;
  72    int   vu_listen_fd;
  73    int   vu_socketfd;
  74    struct fv_VuDev *virtio_dev;
  75    int thread_pool_size;
  76};
  77
  78struct fuse_chan {
  79    pthread_mutex_t lock;
  80    int ctr;
  81    int fd;
  82    struct fv_QueueInfo *qi;
  83};
  84
  85int fuse_send_reply_iov_nofree(fuse_req_t req, int error, struct iovec *iov,
  86                               int count);
  87void fuse_free_req(fuse_req_t req);
  88
  89void fuse_session_process_buf_int(struct fuse_session *se,
  90                                  struct fuse_bufvec *bufv,
  91                                  struct fuse_chan *ch);
  92
  93
  94#define FUSE_MAX_MAX_PAGES 256
  95#define FUSE_DEFAULT_MAX_PAGES_PER_REQ 32
  96
  97/* room needed in buffer to accommodate header */
  98#define FUSE_BUFFER_HEADER_SIZE 0x1000
  99
 100#endif
 101