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
  25 typedef enum
  26 {
  27     SM_PASSTHROUGH = 1, /* uid/gid set on fileserver files */
  28     SM_MAPPED,  /* uid/gid part of xattr */
  29 } SecModel;
  30
  31 typedef 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
  39 typedef struct FsContext
  40 {
  41     char *fs_root;
  42     SecModel fs_sm;
  43     uid_t uid;
  44 } FsContext;
  45
  46 extern void cred_init(FsCred *);
  47
  48 typedef 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