74 lines
2.2 KiB
C
74 lines
2.2 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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#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 char *erofs_xattr_prefix(unsigned int idx,
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struct dentry *dentry)
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{
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const struct xattr_handler *handler = NULL;
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static const struct xattr_handler * const 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] = &nop_posix_acl_access,
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[EROFS_XATTR_INDEX_POSIX_ACL_DEFAULT] = &nop_posix_acl_default,
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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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if (idx && idx < ARRAY_SIZE(xattr_handler_map))
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handler = xattr_handler_map[idx];
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if (!xattr_handler_can_list(handler, dentry))
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return NULL;
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return xattr_prefix(handler);
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}
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extern const struct xattr_handler * const erofs_xattr_handlers[];
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int erofs_xattr_prefixes_init(struct super_block *sb);
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void erofs_xattr_prefixes_cleanup(struct super_block *sb);
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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_xattr_prefixes_init(struct super_block *sb) { return 0; }
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static inline void erofs_xattr_prefixes_cleanup(struct super_block *sb) {}
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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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