LXR linux/fs/ext2/xattr

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * linux/fs/ext2/xattr_security.c
   4 * Handler for storing security labels as extended attributes.
   5 */
   6
   7#include "ext2.h"
   8#include <linux/security.h>
   9#include "xattr.h"
  10
  11static int
  12ext2_xattr_security_get(const struct xattr_handler *handler,
  13                        struct dentry *unused, struct inode *inode,
  14                        const char *name, void *buffer, size_t size)
  15{
  16        return ext2_xattr_get(inode, EXT2_XATTR_INDEX_SECURITY, name,
  17                              buffer, size);
  18}
  19
  20static int
  21ext2_xattr_security_set(const struct xattr_handler *handler,
  22                        struct dentry *unused, struct inode *inode,
  23                        const char *name, const void *value,
  24                        size_t size, int flags)
  25{
  26        return ext2_xattr_set(inode, EXT2_XATTR_INDEX_SECURITY, name,
  27                              value, size, flags);
  28}
  29
  30static int ext2_initxattrs(struct inode *inode, const struct xattr *xattr_array,
  31                           void *fs_info)
  32{
  33        const struct xattr *xattr;
  34        int err = 0;
  35
  36        for (xattr = xattr_array; xattr->name != NULL; xattr++) {
  37                err = ext2_xattr_set(inode, EXT2_XATTR_INDEX_SECURITY,
  38                                     xattr->name, xattr->value,
  39                                     xattr->value_len, 0);
  40                if (err < 0)
  41                        break;
  42        }
  43        return err;
  44}
  45
  46int
  47ext2_init_security(struct inode *inode, struct inode *dir,
  48                   const struct qstr *qstr)
  49{
  50        return security_inode_init_security(inode, dir, qstr,
  51                                            &ext2_initxattrs, NULL);
  52}
  53
  54const struct xattr_handler ext2_xattr_security_handler = {
  55        .prefix = XATTR_SECURITY_PREFIX,
  56        .get    = ext2_xattr_security_get,
  57        .set    = ext2_xattr_security_set,
  58};
  59