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 *dentry, const char *name,
  13                         void *buffer, size_t size)
  14 {
  15         return ext2_xattr_get(d_inode(dentry), 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 *dentry, const char *name,
  22                         const void *value, size_t size, int flags)
  23 {
  24         return ext2_xattr_set(d_inode(dentry), EXT2_XATTR_INDEX_SECURITY, name,
  25                               value, size, flags);
  26 }
  27
  28 static int ext2_initxattrs(struct inode *inode, const struct xattr *xattr_array,
  29                            void *fs_info)
  30 {
  31         const struct xattr *xattr;
  32         int err = 0;
  33
  34         for (xattr = xattr_array; xattr->name != NULL; xattr++) {
  35                 err = ext2_xattr_set(inode, EXT2_XATTR_INDEX_SECURITY,
  36                                      xattr->name, xattr->value,
  37                                      xattr->value_len, 0);
  38                 if (err < 0)
  39                         break;
  40         }
  41         return err;
  42 }
  43
  44 int
  45 ext2_init_security(struct inode *inode, struct inode *dir,
  46                    const struct qstr *qstr)
  47 {
  48         return security_inode_init_security(inode, dir, qstr,
  49                                             &ext2_initxattrs, NULL);
  50 }
  51
  52 const struct xattr_handler ext2_xattr_security_handler = {
  53         .prefix = XATTR_SECURITY_PREFIX,
  54         .get    = ext2_xattr_security_get,
  55         .set    = ext2_xattr_security_set,
  56 };