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