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

   1/*
   2 * 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
  14#ifndef FILE_OP_9P_H
  15#define FILE_OP_9P_H
  16
  17#include <dirent.h>
  18#include <utime.h>
  19#include <sys/vfs.h>
  20#include "qemu-fsdev-throttle.h"
  21
  22#define SM_LOCAL_MODE_BITS    0600
  23#define SM_LOCAL_DIR_MODE_BITS    0700
  24
  25typedef struct FsCred
  26{
  27    uid_t   fc_uid;
  28    gid_t   fc_gid;
  29    mode_t  fc_mode;
  30    dev_t   fc_rdev;
  31} FsCred;
  32
  33struct xattr_operations;
  34struct FsContext;
  35struct V9fsPath;
  36
  37typedef struct extended_ops {
  38    int (*get_st_gen)(struct FsContext *, struct V9fsPath *,
  39                      mode_t, uint64_t *);
  40} extended_ops;
  41
  42/* export flags */
  43#define V9FS_IMMEDIATE_WRITEOUT     0x00000001
  44#define V9FS_PATHNAME_FSCONTEXT     0x00000002
  45/*
  46 * uid/gid set on fileserver files
  47 */
  48#define V9FS_SM_PASSTHROUGH         0x00000004
  49/*
  50 * uid/gid part of xattr
  51 */
  52#define V9FS_SM_MAPPED              0x00000008
  53/*
  54 * Server will try to set uid/gid.
  55 * On failure ignore the error.
  56 */
  57#define V9FS_SM_NONE                0x00000010
  58/*
  59 * uid/gid part of .virtfs_meatadata namespace
  60 */
  61#define V9FS_SM_MAPPED_FILE         0x00000020
  62#define V9FS_RDONLY                 0x00000040
  63#define V9FS_PROXY_SOCK_FD          0x00000080
  64#define V9FS_PROXY_SOCK_NAME        0x00000100
  65
  66#define V9FS_SEC_MASK               0x0000003C
  67
  68
  69typedef struct FileOperations FileOperations;
  70/*
  71 * Structure to store the various fsdev's passed through command line.
  72 */
  73typedef struct FsDriverEntry {
  74    char *fsdev_id;
  75    char *path;
  76    int export_flags;
  77    FileOperations *ops;
  78    FsThrottle fst;
  79    mode_t fmode;
  80    mode_t dmode;
  81} FsDriverEntry;
  82
  83typedef struct FsContext
  84{
  85    uid_t uid;
  86    char *fs_root;
  87    int export_flags;
  88    struct xattr_operations **xops;
  89    struct extended_ops exops;
  90    FsThrottle *fst;
  91    /* fs driver specific data */
  92    void *private;
  93    mode_t fmode;
  94    mode_t dmode;
  95} FsContext;
  96
  97typedef struct V9fsPath {
  98    uint16_t size;
  99    char *data;
 100} V9fsPath;
 101
 102typedef union V9fsFidOpenState V9fsFidOpenState;
 103
 104void cred_init(FsCred *);
 105
 106struct FileOperations
 107{
 108    int (*parse_opts)(QemuOpts *, struct FsDriverEntry *);
 109    int (*init)(struct FsContext *);
 110    void (*cleanup)(struct FsContext *);
 111    int (*lstat)(FsContext *, V9fsPath *, struct stat *);
 112    ssize_t (*readlink)(FsContext *, V9fsPath *, char *, size_t);
 113    int (*chmod)(FsContext *, V9fsPath *, FsCred *);
 114    int (*chown)(FsContext *, V9fsPath *, FsCred *);
 115    int (*mknod)(FsContext *, V9fsPath *, const char *, FsCred *);
 116    int (*utimensat)(FsContext *, V9fsPath *, const struct timespec *);
 117    int (*remove)(FsContext *, const char *);
 118    int (*symlink)(FsContext *, const char *, V9fsPath *,
 119                   const char *, FsCred *);
 120    int (*link)(FsContext *, V9fsPath *, V9fsPath *, const char *);
 121    int (*setuid)(FsContext *, uid_t);
 122    int (*close)(FsContext *, V9fsFidOpenState *);
 123    int (*closedir)(FsContext *, V9fsFidOpenState *);
 124    int (*opendir)(FsContext *, V9fsPath *, V9fsFidOpenState *);
 125    int (*open)(FsContext *, V9fsPath *, int, V9fsFidOpenState *);
 126    int (*open2)(FsContext *, V9fsPath *, const char *,
 127                 int, FsCred *, V9fsFidOpenState *);
 128    void (*rewinddir)(FsContext *, V9fsFidOpenState *);
 129    off_t (*telldir)(FsContext *, V9fsFidOpenState *);
 130    struct dirent * (*readdir)(FsContext *, V9fsFidOpenState *);
 131    void (*seekdir)(FsContext *, V9fsFidOpenState *, off_t);
 132    ssize_t (*preadv)(FsContext *, V9fsFidOpenState *,
 133                      const struct iovec *, int, off_t);
 134    ssize_t (*pwritev)(FsContext *, V9fsFidOpenState *,
 135                       const struct iovec *, int, off_t);
 136    int (*mkdir)(FsContext *, V9fsPath *, const char *, FsCred *);
 137    int (*fstat)(FsContext *, int, V9fsFidOpenState *, struct stat *);
 138    int (*rename)(FsContext *, const char *, const char *);
 139    int (*truncate)(FsContext *, V9fsPath *, off_t);
 140    int (*fsync)(FsContext *, int, V9fsFidOpenState *, int);
 141    int (*statfs)(FsContext *s, V9fsPath *path, struct statfs *stbuf);
 142    ssize_t (*lgetxattr)(FsContext *, V9fsPath *,
 143                         const char *, void *, size_t);
 144    ssize_t (*llistxattr)(FsContext *, V9fsPath *, void *, size_t);
 145    int (*lsetxattr)(FsContext *, V9fsPath *,
 146                     const char *, void *, size_t, int);
 147    int (*lremovexattr)(FsContext *, V9fsPath *, const char *);
 148    int (*name_to_path)(FsContext *, V9fsPath *, const char *, V9fsPath *);
 149    int (*renameat)(FsContext *ctx, V9fsPath *olddir, const char *old_name,
 150                    V9fsPath *newdir, const char *new_name);
 151    int (*unlinkat)(FsContext *ctx, V9fsPath *dir, const char *name, int flags);
 152    void *opaque;
 153};
 154
 155#endif
 156