89 lines
2.4 KiB
C
89 lines
2.4 KiB
C
/* 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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#ifdef CONFIG_EROFS_FS_SECURITY
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extern const struct xattr_handler erofs_xattr_security_handler;
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#endif
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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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