fs/squashfs/xattr.h

0001 /* SPDX-License-Identifier: GPL-2.0-or-later */
0002 /*
0003  * Squashfs - a compressed read only filesystem for Linux
0004  *
0005  * Copyright (c) 2010
0006  * Phillip Lougher <phillip@squashfs.org.uk>
0007  *
0008  * xattr.h
0009  */
0010
0011 #ifdef CONFIG_SQUASHFS_XATTR
0012 extern __le64 *squashfs_read_xattr_id_table(struct super_block *, u64,
0013         u64 *, int *);
0014 extern int squashfs_xattr_lookup(struct super_block *, unsigned int, int *,
0015         unsigned int *, unsigned long long *);
0016 #else
0017 static inline __le64 *squashfs_read_xattr_id_table(struct super_block *sb,
0018         u64 start, u64 *xattr_table_start, int *xattr_ids)
0019 {
0020     struct squashfs_xattr_id_table *id_table;
0021
0022     id_table = squashfs_read_table(sb, start, sizeof(*id_table));
0023     if (IS_ERR(id_table))
0024         return (__le64 *) id_table;
0025
0026     *xattr_table_start = le64_to_cpu(id_table->xattr_table_start);
0027     kfree(id_table);
0028
0029     ERROR("Xattrs in filesystem, these will be ignored\n");
0030     return ERR_PTR(-ENOTSUPP);
0031 }
0032
0033 static inline int squashfs_xattr_lookup(struct super_block *sb,
0034         unsigned int index, int *count, unsigned int *size,
0035         unsigned long long *xattr)
0036 {
0037     return 0;
0038 }
0039 #define squashfs_listxattr NULL
0040 #define squashfs_xattr_handlers NULL
0041 #endif