hw/9pfs/virtio-9p-xattr.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 _QEMU_VIRTIO_9P_XATTR_H
  14 #define _QEMU_VIRTIO_9P_XATTR_H
  15
  16 #include <attr/xattr.h>
  17
  18 typedef struct xattr_operations
  19 {
  20     const char *name;
  21     ssize_t (*getxattr)(FsContext *ctx, const char *path,
  22                         const char *name, void *value, size_t size);
  23     ssize_t (*listxattr)(FsContext *ctx, const char *path,
  24                          char *name, void *value, size_t size);
  25     int (*setxattr)(FsContext *ctx, const char *path, const char *name,
  26                     void *value, size_t size, int flags);
  27     int (*removexattr)(FsContext *ctx,
  28                        const char *path, const char *name);
  29 } XattrOperations;
  30
  31
  32 extern XattrOperations mapped_user_xattr;
  33 extern XattrOperations passthrough_user_xattr;
  34
  35 extern XattrOperations mapped_pacl_xattr;
  36 extern XattrOperations mapped_dacl_xattr;
  37 extern XattrOperations passthrough_acl_xattr;
  38 extern XattrOperations none_acl_xattr;
  39
  40 extern XattrOperations *mapped_xattr_ops[];
  41 extern XattrOperations *passthrough_xattr_ops[];
  42 extern XattrOperations *none_xattr_ops[];
  43
  44 ssize_t v9fs_get_xattr(FsContext *ctx, const char *path, const char *name,
  45                        void *value, size_t size);
  46 ssize_t v9fs_list_xattr(FsContext *ctx, const char *path, void *value,
  47                         size_t vsize);
  48 int v9fs_set_xattr(FsContext *ctx, const char *path, const char *name,
  49                           void *value, size_t size, int flags);
  50 int v9fs_remove_xattr(FsContext *ctx, const char *path, const char *name);
  51 ssize_t pt_listxattr(FsContext *ctx, const char *path, char *name, void *value,
  52                      size_t size);
  53
  54 static inline ssize_t pt_getxattr(FsContext *ctx, const char *path,
  55                                   const char *name, void *value, size_t size)
  56 {
  57     char buffer[PATH_MAX];
  58     return lgetxattr(rpath(ctx, path, buffer), name, value, size);
  59 }
  60
  61 static inline int pt_setxattr(FsContext *ctx, const char *path,
  62                               const char *name, void *value,
  63                               size_t size, int flags)
  64 {
  65     char buffer[PATH_MAX];
  66     return lsetxattr(rpath(ctx, path, buffer), name, value, size, flags);
  67 }
  68
  69 static inline int pt_removexattr(FsContext *ctx,
  70                                  const char *path, const char *name)
  71 {
  72     char buffer[PATH_MAX];
  73     return lremovexattr(rpath(ctx, path, buffer), name);
  74 }
  75
  76 static inline ssize_t notsup_getxattr(FsContext *ctx, const char *path,
  77                                       const char *name, void *value,
  78                                       size_t size)
  79 {
  80     errno = ENOTSUP;
  81     return -1;
  82 }
  83
  84 static inline int notsup_setxattr(FsContext *ctx, const char *path,
  85                                   const char *name, void *value,
  86                                   size_t size, int flags)
  87 {
  88     errno = ENOTSUP;
  89     return -1;
  90 }
  91
  92 static inline ssize_t notsup_listxattr(FsContext *ctx, const char *path,
  93                                        char *name, void *value, size_t size)
  94 {
  95     return 0;
  96 }
  97
  98 static inline int notsup_removexattr(FsContext *ctx,
  99                                      const char *path, const char *name)
 100 {
 101     errno = ENOTSUP;
 102     return -1;
 103 }
 104
 105 #endif