linux/fs/erofs/xattr.h
Gao Xiang 53a7f9961c erofs: clean up unnecessary code and comments
Some conditional macros and comments are useless.

Link: https://lore.kernel.org/r/20220927063607.54832-1-hsiangkao@linux.alibaba.com
Reviewed-by: Yue Hu <huyue2@coolpad.com>
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
2022-09-27 17:27:25 +08:00

87 lines
2.3 KiB
C

/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (C) 2017-2018 HUAWEI, Inc.
* https://www.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;
extern const struct xattr_handler erofs_xattr_security_handler;
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;
}
#define erofs_listxattr (NULL)
#define erofs_xattr_handlers (NULL)
#endif /* !CONFIG_EROFS_FS_XATTR */
#ifdef CONFIG_EROFS_FS_POSIX_ACL
struct posix_acl *erofs_get_acl(struct inode *inode, int type, bool rcu);
#else
#define erofs_get_acl (NULL)
#endif
#endif