passthrough_ll.c

Go to the documentation of this file.

/*
  FUSE: Filesystem in Userspace
  Copyright (C) 2001-2007  Miklos Szeredi <miklos@szeredi.hu>

  This program can be distributed under the terms of the GNU GPL.
  See the file COPYING.
*/

#define _GNU_SOURCE
#define FUSE_USE_VERSION 31

#include "config.h"

#include <fuse_lowlevel.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <stddef.h>
#include <stdbool.h>
#include <string.h>
#include <limits.h>
#include <dirent.h>
#include <assert.h>
#include <errno.h>
#include <err.h>
#include <inttypes.h>
#include <pthread.h>
#include <sys/file.h>
#include <sys/xattr.h>

/* We are re-using pointers to our `struct lo_inode` and `struct
   lo_dirp` elements as inodes. This means that we must be able to
   store uintptr_t values in a fuse_ino_t variable. The following
   incantation checks this condition at compile time. */
#if defined(__GNUC__) && (__GNUC__ > 4 || __GNUC__ == 4 && __GNUC_MINOR__ >= 6) && !defined __cplusplus
_Static_assert(sizeof(fuse_ino_t) >= sizeof(uintptr_t),
               "fuse_ino_t too small to hold uintptr_t values!");
#else
struct _uintptr_to_must_hold_fuse_ino_t_dummy_struct \
        { unsigned _uintptr_to_must_hold_fuse_ino_t:
                        ((sizeof(fuse_ino_t) >= sizeof(uintptr_t)) ? 1 : -1); };
#endif

struct lo_inode {
        struct lo_inode *next; /* protected by lo->mutex */
        struct lo_inode *prev; /* protected by lo->mutex */
        int fd;
        bool is_symlink;
        ino_t ino;
        dev_t dev;
        uint64_t refcount; /* protected by lo->mutex */
};

enum {
        CACHE_NEVER,
an class="keyword">struct html#ad119a72f00b4cd2e4a500fd3364ae1e2">fuse_ino_t parent, fuse_ino452">                 lass="lineyword">struct fuse_cmdline_opts opts;
fuse_ino452">                 
 1.8.1                                    int fd;
        bool is_symlink;< class="lineno">   76         bool         
 1.8.1                                    int fd;
8a name="l00076">attr_timeout = lo->timeout;
        e->fuse_ino_t ino, struct struct fuse_lowlevel_ops lo_oper = {
        .