linux/fs/squashfs/xattr.h
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   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2/*
   3 * Squashfs - a compressed read only filesystem for Linux
   4 *
   5 * Copyright (c) 2010
   6 * Phillip Lougher <phillip@squashfs.org.uk>
   7 *
   8 * xattr.h
   9 */
  10
  11#ifdef CONFIG_SQUASHFS_XATTR
  12extern __le64 *squashfs_read_xattr_id_table(struct super_block *, u64,
  13                u64 *, int *);
  14extern int squashfs_xattr_lookup(struct super_block *, unsigned int, int *,
  15                unsigned int *, unsigned long long *);
  16#else
  17static inline __le64 *squashfs_read_xattr_id_table(struct super_block *sb,
  18                u64 start, u64 *xattr_table_start, int *xattr_ids)
  19{
  20        struct squashfs_xattr_id_table *id_table;
  21
  22        id_table = squashfs_read_table(sb, start, sizeof(*id_table));
  23        if (IS_ERR(id_table))
  24                return (__le64 *) id_table;
  25
  26        *xattr_table_start = le64_to_cpu(id_table->xattr_table_start);
  27        kfree(id_table);
  28
  29        ERROR("Xattrs in filesystem, these will be ignored\n");
  30        return ERR_PTR(-ENOTSUPP);
  31}
  32
  33static inline int squashfs_xattr_lookup(struct super_block *sb,
  34                unsigned int index, int *count, unsigned int *size,
  35                unsigned long long *xattr)
  36{
  37        return 0;
  38}
  39#define squashfs_listxattr NULL
  40#define squashfs_xattr_handlers NULL
  41#endif
  42