LCOV - code coverage report
Current view: top level - lkbce/fs/ext2 - xattr_trusted.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 17 17 100.0 %
Date: 2017-01-25 Functions: 3 3 100.0 %

          Line data    Source code
       1             : /*
       2             :  * linux/fs/ext2/xattr_trusted.c
       3             :  * Handler for trusted extended attributes.
       4             :  *
       5             :  * Copyright (C) 2003 by Andreas Gruenbacher, <a.gruenbacher@computer.org>
       6             :  */
       7             : 
       8             : #include <linux/module.h>
       9             : #include <linux/string.h>
      10             : #include <linux/capability.h>
      11             : #include <linux/fs.h>
      12             : #include <linux/ext2_fs.h>
      13             : #include "xattr.h"
      14             : 
      15             : static size_t
      16             : ext2_xattr_trusted_list(struct dentry *dentry, char *list, size_t list_size,
      17             :                 const char *name, size_t name_len, int type)
      18             : {
      19           2 :         const int prefix_len = XATTR_TRUSTED_PREFIX_LEN;
      20           2 :         const size_t total_len = prefix_len + name_len + 1;
      21           1 : 
      22           3 :         if (!capable(CAP_SYS_ADMIN))
      23           1 :                 return 0;
      24             : 
      25           4 :         if (list && total_len <= list_size) {
      26           1 :                 memcpy(list, XATTR_TRUSTED_PREFIX, prefix_len);
      27           1 :                 memcpy(list+prefix_len, name, name_len);
      28           1 :                 list[prefix_len + name_len] = '\0';
      29             :         }
      30           1 :         return total_len;
      31             : }
      32             : 
      33             : static int
      34             : ext2_xattr_trusted_get(struct dentry *dentry, const char *name,
      35             :                 void *buffer, size_t size, int type)
      36             : {
      37           4 :         if (strcmp(name, "") == 0)
      38           2 :                 return -EINVAL;
      39           4 :         return ext2_xattr_get(dentry->d_inode, EXT2_XATTR_INDEX_TRUSTED, name,
      40             :                               buffer, size);
      41             : }
      42             : 
      43             : static int
      44             : ext2_xattr_trusted_set(struct dentry *dentry, const char *name,
      45             :                 const void *value, size_t size, int flags, int type)
      46             : {
      47           4 :         if (strcmp(name, "") == 0)
      48           2 :                 return -EINVAL;
      49           4 :         return ext2_xattr_set(dentry->d_inode, EXT2_XATTR_INDEX_TRUSTED, name,
      50             :                               value, size, flags);
      51             : }
      52             : 
      53           1 : struct xattr_handler ext2_xattr_trusted_handler = {
      54             :         .prefix = XATTR_TRUSTED_PREFIX,
      55             :         .list   = ext2_xattr_trusted_list,
      56             :         .get    = ext2_xattr_trusted_get,
      57             :         .set    = ext2_xattr_trusted_set,
      58             : };

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