LXR qemu/hw/file-op-9p.h

   1/*
   2 * Virtio 9p
   3 *
   4 * Copyright IBM, Corp. 2010
   5 *
   6 * Authors:
   7 *  Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
   8 *
   9 * This work is licensed under the terms of the GNU GPL, version 2.  See
  10 * the COPYING file in the top-level directory.
  11 *
  12 */
  13#ifndef _FILEOP_H
  14#define _FILEOP_H
  15#include <sys/types.h>
  16#include <dirent.h>
  17#include <sys/time.h>
  18#include <utime.h>
  19#include <sys/stat.h>
  20#include <sys/uio.h>
  21#include <sys/vfs.h>
  22#define SM_LOCAL_MODE_BITS    0600
  23#define SM_LOCAL_DIR_MODE_BITS    0700
  24
  25typedef enum
  26{
  27    SM_PASSTHROUGH = 1, /* uid/gid set on fileserver files */
  28    SM_MAPPED,  /* uid/gid part of xattr */
  29} SecModel;
  30
  31typedef struct FsCred
  32{
  33    uid_t   fc_uid;
  34    gid_t   fc_gid;
  35    mode_t  fc_mode;
  36    dev_t   fc_rdev;
  37} FsCred;
  38
  39typedef struct FsContext
  40{
  41    char *fs_root;
  42    SecModel fs_sm;
  43    uid_t uid;
  44} FsContext;
  45
  46extern void cred_init(FsCred *);
  47
  48typedef struct FileOperations
  49{
  50    int (*lstat)(FsContext *, const char *, struct stat *);
  51    ssize_t (*readlink)(FsContext *, const char *, char *, size_t);
  52    int (*chmod)(FsContext *, const char *, FsCred *);
  53    int (*chown)(FsContext *, const char *, FsCred *);
  54    int (*mknod)(FsContext *, const char *, FsCred *);
  55    int (*utime)(FsContext *, const char *, const struct utimbuf *);
  56    int (*remove)(FsContext *, const char *);
  57    int (*symlink)(FsContext *, const char *, const char *, FsCred *);
  58    int (*link)(FsContext *, const char *, const char *);
  59    int (*setuid)(FsContext *, uid_t);
  60    int (*close)(FsContext *, int);
  61    int (*closedir)(FsContext *, DIR *);
  62    DIR *(*opendir)(FsContext *, const char *);
  63    int (*open)(FsContext *, const char *, int);
  64    int (*open2)(FsContext *, const char *, int, FsCred *);
  65    void (*rewinddir)(FsContext *, DIR *);
  66    off_t (*telldir)(FsContext *, DIR *);
  67    struct dirent *(*readdir)(FsContext *, DIR *);
  68    void (*seekdir)(FsContext *, DIR *, off_t);
  69    ssize_t (*readv)(FsContext *, int, const struct iovec *, int);
  70    ssize_t (*writev)(FsContext *, int, const struct iovec *, int);
  71    off_t (*lseek)(FsContext *, int, off_t, int);
  72    int (*mkdir)(FsContext *, const char *, FsCred *);
  73    int (*fstat)(FsContext *, int, struct stat *);
  74    int (*rename)(FsContext *, const char *, const char *);
  75    int (*truncate)(FsContext *, const char *, off_t);
  76    int (*fsync)(FsContext *, int);
  77    void *opaque;
  78} FileOperations;
  79#endif
  80