LXR linux/fs/ext2/xattr

   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
  10static int
  11ext2_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
  19static int
  20ext2_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
  29static 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
  45int
  46ext2_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
  53const 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};
  58