147e4937aSGao Xiang /* SPDX-License-Identifier: GPL-2.0-only */ 247e4937aSGao Xiang /* 347e4937aSGao Xiang * Copyright (C) 2017-2018 HUAWEI, Inc. 4592e7cd0SAlexander A. Klimov * https://www.huawei.com/ 547e4937aSGao Xiang */ 647e4937aSGao Xiang #ifndef __EROFS_XATTR_H 747e4937aSGao Xiang #define __EROFS_XATTR_H 847e4937aSGao Xiang 947e4937aSGao Xiang #include "internal.h" 1047e4937aSGao Xiang #include <linux/posix_acl_xattr.h> 1147e4937aSGao Xiang #include <linux/xattr.h> 1247e4937aSGao Xiang 1347e4937aSGao Xiang /* Attribute not found */ 1447e4937aSGao Xiang #define ENOATTR ENODATA 1547e4937aSGao Xiang 1647e4937aSGao Xiang #ifdef CONFIG_EROFS_FS_XATTR 1747e4937aSGao Xiang extern const struct xattr_handler erofs_xattr_user_handler; 1847e4937aSGao Xiang extern const struct xattr_handler erofs_xattr_trusted_handler; 1947e4937aSGao Xiang extern const struct xattr_handler erofs_xattr_security_handler; 2047e4937aSGao Xiang 21a5488f29SChristian Brauner static inline const char *erofs_xattr_prefix(unsigned int idx, 22a5488f29SChristian Brauner struct dentry *dentry) 2347e4937aSGao Xiang { 24a5488f29SChristian Brauner const struct xattr_handler *handler = NULL; 25a5488f29SChristian Brauner 26*3591f40eSWedson Almeida Filho static const struct xattr_handler * const xattr_handler_map[] = { 2747e4937aSGao Xiang [EROFS_XATTR_INDEX_USER] = &erofs_xattr_user_handler, 2847e4937aSGao Xiang #ifdef CONFIG_EROFS_FS_POSIX_ACL 29d549b741SChristian Brauner [EROFS_XATTR_INDEX_POSIX_ACL_ACCESS] = &nop_posix_acl_access, 30d549b741SChristian Brauner [EROFS_XATTR_INDEX_POSIX_ACL_DEFAULT] = &nop_posix_acl_default, 3147e4937aSGao Xiang #endif 3247e4937aSGao Xiang [EROFS_XATTR_INDEX_TRUSTED] = &erofs_xattr_trusted_handler, 3347e4937aSGao Xiang #ifdef CONFIG_EROFS_FS_SECURITY 3447e4937aSGao Xiang [EROFS_XATTR_INDEX_SECURITY] = &erofs_xattr_security_handler, 3547e4937aSGao Xiang #endif 3647e4937aSGao Xiang }; 3747e4937aSGao Xiang 38a5488f29SChristian Brauner if (idx && idx < ARRAY_SIZE(xattr_handler_map)) 39a5488f29SChristian Brauner handler = xattr_handler_map[idx]; 40a5488f29SChristian Brauner 41a5488f29SChristian Brauner if (!xattr_handler_can_list(handler, dentry)) 42a5488f29SChristian Brauner return NULL; 43a5488f29SChristian Brauner 44a5488f29SChristian Brauner return xattr_prefix(handler); 4547e4937aSGao Xiang } 4647e4937aSGao Xiang 47*3591f40eSWedson Almeida Filho extern const struct xattr_handler * const erofs_xattr_handlers[]; 4847e4937aSGao Xiang 499e382914SJingbo Xu int erofs_xattr_prefixes_init(struct super_block *sb); 509e382914SJingbo Xu void erofs_xattr_prefixes_cleanup(struct super_block *sb); 5147e4937aSGao Xiang int erofs_getxattr(struct inode *, int, const char *, void *, size_t); 5247e4937aSGao Xiang ssize_t erofs_listxattr(struct dentry *, char *, size_t); 5347e4937aSGao Xiang #else 549e382914SJingbo Xu static inline int erofs_xattr_prefixes_init(struct super_block *sb) { return 0; } 559e382914SJingbo Xu static inline void erofs_xattr_prefixes_cleanup(struct super_block *sb) {} 5647e4937aSGao Xiang static inline int erofs_getxattr(struct inode *inode, int index, 5747e4937aSGao Xiang const char *name, void *buffer, 5847e4937aSGao Xiang size_t buffer_size) 5947e4937aSGao Xiang { 6047e4937aSGao Xiang return -EOPNOTSUPP; 6147e4937aSGao Xiang } 6247e4937aSGao Xiang 63e7cda1eeSChengguang Xu #define erofs_listxattr (NULL) 64e7cda1eeSChengguang Xu #define erofs_xattr_handlers (NULL) 6547e4937aSGao Xiang #endif /* !CONFIG_EROFS_FS_XATTR */ 6647e4937aSGao Xiang 6747e4937aSGao Xiang #ifdef CONFIG_EROFS_FS_POSIX_ACL 680cad6246SMiklos Szeredi struct posix_acl *erofs_get_acl(struct inode *inode, int type, bool rcu); 6947e4937aSGao Xiang #else 7047e4937aSGao Xiang #define erofs_get_acl (NULL) 7147e4937aSGao Xiang #endif 7247e4937aSGao Xiang 7347e4937aSGao Xiang #endif 74