cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

xattr.h (2408B)

      1/* SPDX-License-Identifier: GPL-2.0-only */
      2/*
      3 * Copyright (C) 2017-2018 HUAWEI, Inc.
      4 *             https://www.huawei.com/
      5 */
      6#ifndef __EROFS_XATTR_H
      7#define __EROFS_XATTR_H
      8
      9#include "internal.h"
     10#include <linux/posix_acl_xattr.h>
     11#include <linux/xattr.h>
     12
     13/* Attribute not found */
     14#define ENOATTR         ENODATA
     15
     16static inline unsigned int inlinexattr_header_size(struct inode *inode)
     17{
     18	return sizeof(struct erofs_xattr_ibody_header) +
     19		sizeof(u32) * EROFS_I(inode)->xattr_shared_count;
     20}
     21
     22static inline erofs_blk_t xattrblock_addr(struct erofs_sb_info *sbi,
     23					  unsigned int xattr_id)
     24{
     25#ifdef CONFIG_EROFS_FS_XATTR
     26	return sbi->xattr_blkaddr +
     27		xattr_id * sizeof(__u32) / EROFS_BLKSIZ;
     28#else
     29	return 0;
     30#endif
     31}
     32
     33static inline unsigned int xattrblock_offset(struct erofs_sb_info *sbi,
     34					     unsigned int xattr_id)
     35{
     36	return (xattr_id * sizeof(__u32)) % EROFS_BLKSIZ;
     37}
     38
     39#ifdef CONFIG_EROFS_FS_XATTR
     40extern const struct xattr_handler erofs_xattr_user_handler;
     41extern const struct xattr_handler erofs_xattr_trusted_handler;
     42#ifdef CONFIG_EROFS_FS_SECURITY
     43extern const struct xattr_handler erofs_xattr_security_handler;
     44#endif
     45
     46static inline const struct xattr_handler *erofs_xattr_handler(unsigned int idx)
     47{
     48	static const struct xattr_handler *xattr_handler_map[] = {
     49		[EROFS_XATTR_INDEX_USER] = &erofs_xattr_user_handler,
     50#ifdef CONFIG_EROFS_FS_POSIX_ACL
     51		[EROFS_XATTR_INDEX_POSIX_ACL_ACCESS] =
     52			&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
     66extern const struct xattr_handler *erofs_xattr_handlers[];
     67
     68int erofs_getxattr(struct inode *, int, const char *, void *, size_t);
     69ssize_t erofs_listxattr(struct dentry *, char *, size_t);
     70#else
     71static 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#define erofs_listxattr (NULL)
     79#define erofs_xattr_handlers (NULL)
     80#endif	/* !CONFIG_EROFS_FS_XATTR */
     81
     82#ifdef CONFIG_EROFS_FS_POSIX_ACL
     83struct posix_acl *erofs_get_acl(struct inode *inode, int type, bool rcu);
     84#else
     85#define erofs_get_acl	(NULL)
     86#endif
     87
     88#endif