| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| 2 | /* |
| 3 | * Copyright (C) 2017-2018 HUAWEI, Inc. |
| 4 | * http://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 | |
| 17 | static 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 | |
| 23 | static 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 | |
| 34 | static 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 |
| 41 | extern const struct xattr_handler erofs_xattr_user_handler; |
| 42 | extern const struct xattr_handler erofs_xattr_trusted_handler; |
| 43 | #ifdef CONFIG_EROFS_FS_SECURITY |
| 44 | extern const struct xattr_handler erofs_xattr_security_handler; |
| 45 | #endif |
| 46 | |
| 47 | static 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] = &posix_acl_access_xattr_handler, |
| 53 | [EROFS_XATTR_INDEX_POSIX_ACL_DEFAULT] = |
| 54 | &posix_acl_default_xattr_handler, |
| 55 | #endif |
| 56 | [EROFS_XATTR_INDEX_TRUSTED] = &erofs_xattr_trusted_handler, |
| 57 | #ifdef CONFIG_EROFS_FS_SECURITY |
| 58 | [EROFS_XATTR_INDEX_SECURITY] = &erofs_xattr_security_handler, |
| 59 | #endif |
| 60 | }; |
| 61 | |
| 62 | return idx && idx < ARRAY_SIZE(xattr_handler_map) ? |
| 63 | xattr_handler_map[idx] : NULL; |
| 64 | } |
| 65 | |
| 66 | extern const struct xattr_handler *erofs_xattr_handlers[]; |
| 67 | |
| 68 | int erofs_getxattr(struct inode *, int, const char *, void *, size_t); |
| 69 | ssize_t erofs_listxattr(struct dentry *, char *, size_t); |
| 70 | #else |
| 71 | static inline int erofs_getxattr(struct inode *inode, int index, |
| 72 | const char *name, void *buffer, |
| 73 | size_t buffer_size) |
| 74 | { |
| 75 | return -EOPNOTSUPP; |
| 76 | } |
| 77 | |
| 78 | static inline ssize_t erofs_listxattr(struct dentry *dentry, |
| 79 | char *buffer, size_t buffer_size) |
| 80 | { |
| 81 | return -EOPNOTSUPP; |
| 82 | } |
| 83 | #endif /* !CONFIG_EROFS_FS_XATTR */ |
| 84 | |
| 85 | #ifdef CONFIG_EROFS_FS_POSIX_ACL |
| 86 | struct posix_acl *erofs_get_acl(struct inode *inode, int type); |
| 87 | #else |
| 88 | #define erofs_get_acl (NULL) |
| 89 | #endif |
| 90 | |
| 91 | #endif |
| 92 | |