fs/ext2/xattr_security.c

   1 /*
   2  * linux/fs/ext2/xattr_security.c
   3  * Handler for storing security labels as extended attributes.
   4  */
   5
   6 #include "ext2.h"
   7 #include <linux/security.h>
   8 #include "xattr.h"
   9
  10 static int
  11 ext2_xattr_security_get(const struct xattr_handler *handler,
  12                         struct dentry *unused, struct inode *inode,
  13                         const char *name, void *buffer, size_t size)
  14 {
  15         return ext2_xattr_get(inode, EXT2_XATTR_INDEX_SECURITY, name,
  16                               buffer, size);
  17 }
  18
  19 static int
  20 ext2_xattr_security_set(const struct xattr_handler *handler,
  21                         struct dentry *unused, struct inode *inode,
  22                         const char *name, const void *value,
  23                         size_t size, int flags)
  24 {
  25         return ext2_xattr_set(inode, EXT2_XATTR_INDEX_SECURITY, name,
  26                               value, size, flags);
  27 }
  28
  29 static int ext2_initxattrs(struct inode *inode, const struct xattr *xattr_array,
  30                            void *fs_info)
  31 {
  32         const struct xattr *xattr;
  33         int err = 0;
  34
  35         for (xattr = xattr_array; xattr->name != NULL; xattr++) {
  36                 err = ext2_xattr_set(inode, EXT2_XATTR_INDEX_SECURITY,
  37                                      xattr->name, xattr->value,
  38                                      xattr->value_len, 0);
  39                 if (err < 0)
  40                         break;
  41         }
  42         return err;
  43 }
  44
  45 int
  46 ext2_init_security(struct inode *inode, struct inode *dir,
  47                    const struct qstr *qstr)
  48 {
  49         return security_inode_init_security(inode, dir, qstr,
  50                                             &ext2_initxattrs, NULL);
  51 }
  52
  53 const struct xattr_handler ext2_xattr_security_handler = {
  54         .prefix = XATTR_SECURITY_PREFIX,
  55         .get    = ext2_xattr_security_get,
  56         .set    = ext2_xattr_security_set,
  57 };