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_security_context {
  19        const char *name;
  20        uint32_t ctxlen;
  21        const void *ctx;
  22};
  23
  24struct fuse_req {
  25    struct fuse_session *se;
  26    uint64_t unique;
  27    int ctr;
  28    pthread_mutex_t lock;
  29    struct fuse_ctx ctx;
  30    struct fuse_chan *ch;
  31    int interrupted;
  32    unsigned int ioctl_64bit:1;
  33    union {
  34        struct {
  35            uint64_t unique;
  36        } i;
  37        struct {
  38            fuse_interrupt_func_t func;
  39            void *data;
  40        } ni;
  41    } u;
  42    struct fuse_req *next;
  43    struct fuse_req *prev;
  44    struct fuse_security_context secctx;
  45};
  46
  47struct fuse_notify_req {
  48    uint64_t unique;
  49    void (*reply)(struct fuse_notify_req *, fuse_req_t, fuse_ino_t,
  50                  const void *, const struct fuse_buf *);
  51    struct fuse_notify_req *next;
  52    struct fuse_notify_req *prev;
  53};
  54
  55struct fuse_session {
  56    char *mountpoint;
  57    volatile int exited;
  58    int fd;
  59    int debug;
  60    int deny_others;
  61    struct fuse_lowlevel_ops op;
  62    int got_init;
  63    struct cuse_data *cuse_data;
  64    void *userdata;
  65    uid_t owner;
  66    struct fuse_conn_info conn;
  67    struct fuse_req list;
  68    struct fuse_req interrupts;
  69    pthread_mutex_t lock;
  70    pthread_rwlock_t init_rwlock;
  71    int got_destroy;
  72    int broken_splice_nonblock;
  73    uint64_t notify_ctr;
  74    struct fuse_notify_req notify_list;
  75    size_t bufsize;
  76    int error;
  77    char *vu_socket_path;
  78    char *vu_socket_group;
  79    int   vu_listen_fd;
  80    int   vu_socketfd;
  81    struct fv_VuDev *virtio_dev;
  82    int thread_pool_size;
  83};
  84
  85struct fuse_chan {
  86    pthread_mutex_t lock;
  87    int ctr;
  88    int fd;
  89    struct fv_QueueInfo *qi;
  90};
  91
  92int fuse_send_reply_iov_nofree(fuse_req_t req, int error, struct iovec *iov,
  93                               int count);
  94void fuse_free_req(fuse_req_t req);
  95
  96void fuse_session_process_buf_int(struct fuse_session *se,
  97                                  struct fuse_bufvec *bufv,
  98                                  struct fuse_chan *ch);
  99
 100
 101#define FUSE_MAX_MAX_PAGES 256
 102#define FUSE_DEFAULT_MAX_PAGES_PER_REQ 32
 103
 104/* room needed in buffer to accommodate header */
 105#define FUSE_BUFFER_HEADER_SIZE 0x1000
 106
 107#endif
 108