hw/9pfs/9p-xattr.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 QEMU_9P_XATTR_H
  15 #define QEMU_9P_XATTR_H
  16
  17 #include "qemu/xattr.h"
  18
  19 typedef struct xattr_operations
  20 {
  21     const char *name;
  22     ssize_t (*getxattr)(FsContext *ctx, const char *path,
  23                         const char *name, void *value, size_t size);
  24     ssize_t (*listxattr)(FsContext *ctx, const char *path,
  25                          char *name, void *value, size_t size);
  26     int (*setxattr)(FsContext *ctx, const char *path, const char *name,
  27                     void *value, size_t size, int flags);
  28     int (*removexattr)(FsContext *ctx,
  29                        const char *path, const char *name);
  30 } XattrOperations;
  31
  32
  33 extern XattrOperations mapped_user_xattr;
  34 extern XattrOperations passthrough_user_xattr;
  35
  36 extern XattrOperations mapped_pacl_xattr;
  37 extern XattrOperations mapped_dacl_xattr;
  38 extern XattrOperations passthrough_acl_xattr;
  39 extern XattrOperations none_acl_xattr;
  40
  41 extern XattrOperations *mapped_xattr_ops[];
  42 extern XattrOperations *passthrough_xattr_ops[];
  43 extern XattrOperations *none_xattr_ops[];
  44
  45 ssize_t v9fs_get_xattr(FsContext *ctx, const char *path, const char *name,
  46                        void *value, size_t size);
  47 ssize_t v9fs_list_xattr(FsContext *ctx, const char *path, void *value,
  48                         size_t vsize);
  49 int v9fs_set_xattr(FsContext *ctx, const char *path, const char *name,
  50                           void *value, size_t size, int flags);
  51 int v9fs_remove_xattr(FsContext *ctx, const char *path, const char *name);
  52 ssize_t pt_listxattr(FsContext *ctx, const char *path, char *name, void *value,
  53                      size_t size);
  54
  55 static inline ssize_t pt_getxattr(FsContext *ctx, const char *path,
  56                                   const char *name, void *value, size_t size)
  57 {
  58     char *buffer;
  59     ssize_t ret;
  60
  61     buffer = rpath(ctx, path);
  62     ret = lgetxattr(buffer, name, value, size);
  63     g_free(buffer);
  64     return ret;
  65 }
  66
  67 static inline int pt_setxattr(FsContext *ctx, const char *path,
  68                               const char *name, void *value,
  69                               size_t size, int flags)
  70 {
  71     char *buffer;
  72     int ret;
  73
  74     buffer = rpath(ctx, path);
  75     ret = lsetxattr(buffer, name, value, size, flags);
  76     g_free(buffer);
  77     return ret;
  78 }
  79
  80 static inline int pt_removexattr(FsContext *ctx,
  81                                  const char *path, const char *name)
  82 {
  83     char *buffer;
  84     int ret;
  85
  86     buffer = rpath(ctx, path);
  87     ret = lremovexattr(path, name);
  88     g_free(buffer);
  89     return ret;
  90 }
  91
  92 static inline ssize_t notsup_getxattr(FsContext *ctx, const char *path,
  93                                       const char *name, void *value,
  94                                       size_t size)
  95 {
  96     errno = ENOTSUP;
  97     return -1;
  98 }
  99
 100 static inline int notsup_setxattr(FsContext *ctx, const char *path,
 101                                   const char *name, void *value,
 102                                   size_t size, int flags)
 103 {
 104     errno = ENOTSUP;
 105     return -1;
 106 }
 107
 108 static inline ssize_t notsup_listxattr(FsContext *ctx, const char *path,
 109                                        char *name, void *value, size_t size)
 110 {
 111     return 0;
 112 }
 113
 114 static inline int notsup_removexattr(FsContext *ctx,
 115                                      const char *path, const char *name)
 116 {
 117     errno = ENOTSUP;
 118     return -1;
 119 }
 120
 121 #endif