| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * Copyright (C) 2017-2018 HUAWEI, Inc. |
| * http://www.huawei.com/ |
| * Created by Gao Xiang <gaoxiang25@huawei.com> |
| */ |
| #ifndef __EROFS_XATTR_H |
| #define __EROFS_XATTR_H |
| |
| #include "internal.h" |
| #include <linux/posix_acl_xattr.h> |
| #include <linux/xattr.h> |
| |
| /* Attribute not found */ |
| #define ENOATTR ENODATA |
| |
| static inline unsigned int inlinexattr_header_size(struct inode *inode) |
| { |
| return sizeof(struct erofs_xattr_ibody_header) + |
| sizeof(u32) * EROFS_I(inode)->xattr_shared_count; |
| } |
| |
| static inline erofs_blk_t xattrblock_addr(struct erofs_sb_info *sbi, |
| unsigned int xattr_id) |
| { |
| #ifdef CONFIG_EROFS_FS_XATTR |
| return sbi->xattr_blkaddr + |
| xattr_id * sizeof(__u32) / EROFS_BLKSIZ; |
| #else |
| return 0; |
| #endif |
| } |
| |
| static inline unsigned int xattrblock_offset(struct erofs_sb_info *sbi, |
| unsigned int xattr_id) |
| { |
| return (xattr_id * sizeof(__u32)) % EROFS_BLKSIZ; |
| } |
| |
| #ifdef CONFIG_EROFS_FS_XATTR |
| extern const struct xattr_handler erofs_xattr_user_handler; |
| extern const struct xattr_handler erofs_xattr_trusted_handler; |
| #ifdef CONFIG_EROFS_FS_SECURITY |
| extern const struct xattr_handler erofs_xattr_security_handler; |
| #endif |
| |
| static inline const struct xattr_handler *erofs_xattr_handler(unsigned int idx) |
| { |
| static const struct xattr_handler *xattr_handler_map[] = { |
| [EROFS_XATTR_INDEX_USER] = &erofs_xattr_user_handler, |
| #ifdef CONFIG_EROFS_FS_POSIX_ACL |
| [EROFS_XATTR_INDEX_POSIX_ACL_ACCESS] = |
| &posix_acl_access_xattr_handler, |
| [EROFS_XATTR_INDEX_POSIX_ACL_DEFAULT] = |
| &posix_acl_default_xattr_handler, |
| #endif |
| [EROFS_XATTR_INDEX_TRUSTED] = &erofs_xattr_trusted_handler, |
| #ifdef CONFIG_EROFS_FS_SECURITY |
| [EROFS_XATTR_INDEX_SECURITY] = &erofs_xattr_security_handler, |
| #endif |
| }; |
| |
| return idx && idx < ARRAY_SIZE(xattr_handler_map) ? |
| xattr_handler_map[idx] : NULL; |
| } |
| |
| extern const struct xattr_handler *erofs_xattr_handlers[]; |
| |
| int erofs_getxattr(struct inode *, int, const char *, void *, size_t); |
| ssize_t erofs_listxattr(struct dentry *, char *, size_t); |
| #else |
| static inline int erofs_getxattr(struct inode *inode, int index, |
| const char *name, void *buffer, |
| size_t buffer_size) |
| { |
| return -EOPNOTSUPP; |
| } |
| |
| static inline ssize_t erofs_listxattr(struct dentry *dentry, |
| char *buffer, size_t buffer_size) |
| { |
| return -EOPNOTSUPP; |
| } |
| #endif /* !CONFIG_EROFS_FS_XATTR */ |
| |
| #ifdef CONFIG_EROFS_FS_POSIX_ACL |
| struct posix_acl *erofs_get_acl(struct inode *inode, int type); |
| #else |
| #define erofs_get_acl (NULL) |
| #endif |
| |
| #endif |
| |