1/* SPDX-License-Identifier: GPL-2.0-only */ 2/* 3 * Copyright (C) 2017-2018 HUAWEI, Inc. 4 * https://www.huawei.com/ 5 * Created by Gao Xiang <gaoxiang25@huawei.com> 6 */ 7#ifndef __EROFS_XATTR_H 8#define __EROFS_XATTR_H 9 10#include "internal.h" 11#include <linux/posix_acl_xattr.h> 12#include <linux/xattr.h> 13 14/* Attribute not found */ 15#define ENOATTR ENODATA 16 17static inline unsigned int inlinexattr_header_size(struct inode *inode) 18{ 19 return sizeof(struct erofs_xattr_ibody_header) + 20 sizeof(u32) * EROFS_I(inode)->xattr_shared_count; 21} 22 23static inline erofs_blk_t xattrblock_addr(struct erofs_sb_info *sbi, 24 unsigned int xattr_id) 25{ 26#ifdef CONFIG_EROFS_FS_XATTR 27 return sbi->xattr_blkaddr + 28 xattr_id * sizeof(__u32) / EROFS_BLKSIZ; 29#else 30 return 0; 31#endif 32} 33 34static inline unsigned int xattrblock_offset(struct erofs_sb_info *sbi, 35 unsigned int xattr_id) 36{ 37 return (xattr_id * sizeof(__u32)) % EROFS_BLKSIZ; 38} 39 40#ifdef CONFIG_EROFS_FS_XATTR 41extern const struct xattr_handler erofs_xattr_user_handler; 42extern const struct xattr_handler erofs_xattr_trusted_handler; 43#ifdef CONFIG_EROFS_FS_SECURITY 44extern const struct xattr_handler erofs_xattr_security_handler; 45#endif 46 47static inline const struct xattr_handler *erofs_xattr_handler(unsigned int idx) 48{ 49 static const struct xattr_handler *xattr_handler_map[] = { 50 [EROFS_XATTR_INDEX_USER] = &erofs_xattr_user_handler, 51#ifdef CONFIG_EROFS_FS_POSIX_ACL 52 [EROFS_XATTR_INDEX_POSIX_ACL_ACCESS] = 53 &posix_acl_access_xattr_handler, 54 [EROFS_XATTR_INDEX_POSIX_ACL_DEFAULT] = 55 &posix_acl_default_xattr_handler, 56#endif 57 [EROFS_XATTR_INDEX_TRUSTED] = &erofs_xattr_trusted_handler, 58#ifdef CONFIG_EROFS_FS_SECURITY 59 [EROFS_XATTR_INDEX_SECURITY] = &erofs_xattr_security_handler, 60#endif 61 }; 62 63 return idx && idx < ARRAY_SIZE(xattr_handler_map) ? 64 xattr_handler_map[idx] : NULL; 65} 66 67extern const struct xattr_handler *erofs_xattr_handlers[]; 68 69int erofs_getxattr(struct inode *, int, const char *, void *, size_t); 70ssize_t erofs_listxattr(struct dentry *, char *, size_t); 71#else 72static inline int erofs_getxattr(struct inode *inode, int index, 73 const char *name, void *buffer, 74 size_t buffer_size) 75{ 76 return -EOPNOTSUPP; 77} 78 79#define erofs_listxattr (NULL) 80#define erofs_xattr_handlers (NULL) 81#endif /* !CONFIG_EROFS_FS_XATTR */ 82 83#ifdef CONFIG_EROFS_FS_POSIX_ACL 84struct posix_acl *erofs_get_acl(struct inode *inode, int type); 85#else 86#define erofs_get_acl (NULL) 87#endif 88 89#endif 90 91