1c4853adf6
Reviewed by: pfg (mentor) Approved by: pfg (mentor) MFC after: 6 months Differential Revision: https://reviews.freebsd.org/D13810
130 lines
4.8 KiB
C
130 lines
4.8 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
|
|
*
|
|
* Copyright (c) 2017, Fedor Uporov
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _FS_EXT2FS_EXT2_EXTARTTR_H_
|
|
#define _FS_EXT2FS_EXT2_EXTARTTR_H_
|
|
|
|
/* Linux xattr name indexes */
|
|
#define EXT4_XATTR_INDEX_USER 1
|
|
#define EXT4_XATTR_INDEX_POSIX_ACL_ACCESS 2
|
|
#define EXT4_XATTR_INDEX_POSIX_ACL_DEFAULT 3
|
|
#define EXT4_XATTR_INDEX_TRUSTED 4
|
|
#define EXT4_XATTR_INDEX_LUSTRE 5
|
|
#define EXT4_XATTR_INDEX_SECURITY 6
|
|
#define EXT4_XATTR_INDEX_SYSTEM 7
|
|
#define EXT4_XATTR_INDEX_RICHACL 8
|
|
#define EXT4_XATTR_INDEX_ENCRYPTION 9
|
|
|
|
/* Magic value in attribute blocks */
|
|
#define EXTATTR_MAGIC 0xEA020000
|
|
|
|
/* Max EA name length */
|
|
#define EXT2_EXTATTR_NAMELEN_MAX 255
|
|
|
|
/* EA hash constants */
|
|
#define EXT2_EXTATTR_NAME_HASH_SHIFT 5
|
|
#define EXT2_EXTATTR_VALUE_HASH_SHIFT 16
|
|
#define EXT2_EXTATTR_BLOCK_HASH_SHIFT 16
|
|
|
|
|
|
struct ext2fs_extattr_header {
|
|
int32_t h_magic; /* magic number for identification */
|
|
int32_t h_refcount; /* reference count */
|
|
int32_t h_blocks; /* number of disk blocks used */
|
|
int32_t h_hash; /* hash value of all attributes */
|
|
int32_t h_checksum; /* crc32c(uuid+id+xattrblock) */
|
|
/* id = inum if refcount=1, blknum otherwise */
|
|
uint32_t h_reserved[3]; /* zero right now */
|
|
};
|
|
|
|
struct ext2fs_extattr_dinode_header {
|
|
int32_t h_magic; /* magic number for identification */
|
|
};
|
|
|
|
struct ext2fs_extattr_entry {
|
|
uint8_t e_name_len; /* length of name */
|
|
uint8_t e_name_index; /* attribute name index */
|
|
uint16_t e_value_offs; /* offset in disk block of value */
|
|
uint32_t e_value_block; /* disk block attribute is stored on (n/i) */
|
|
uint32_t e_value_size; /* size of attribute value */
|
|
uint32_t e_hash; /* hash value of name and value */
|
|
char e_name[0]; /* attribute name */
|
|
};
|
|
|
|
#define EXT2_IFIRST(hdr) ((struct ext2fs_extattr_entry *)((hdr)+1))
|
|
|
|
#define EXT2_HDR(bh) ((struct ext2fs_extattr_header *)((bh)->b_data))
|
|
#define EXT2_ENTRY(ptr) ((struct ext2fs_extattr_entry *)(ptr))
|
|
#define EXT2_FIRST_ENTRY(bh) EXT2_ENTRY(EXT2_HDR(bh)+1)
|
|
#define EXT2_IS_LAST_ENTRY(entry) (*(uint32_t *)(entry) == 0)
|
|
|
|
#define EXT2_EXTATTR_PAD_BITS 2
|
|
#define EXT2_EXTATTR_PAD (1<<EXT2_EXTATTR_PAD_BITS)
|
|
#define EXT2_EXTATTR_ROUND (EXT2_EXTATTR_PAD-1)
|
|
#define EXT2_EXTATTR_LEN(name_len) \
|
|
(((name_len) + EXT2_EXTATTR_ROUND + \
|
|
sizeof(struct ext2fs_extattr_entry)) & ~EXT2_EXTATTR_ROUND)
|
|
|
|
#define EXT2_EXTATTR_SIZE(size) \
|
|
(((size) + EXT2_EXTATTR_ROUND) & ~EXT2_EXTATTR_ROUND)
|
|
|
|
#define EXT2_EXTATTR_NEXT(entry) \
|
|
( (struct ext2fs_extattr_entry *)( \
|
|
(char *)(entry) + EXT2_EXTATTR_LEN((entry)->e_name_len)) )
|
|
|
|
int ext2_extattr_inode_delete(struct inode *ip, int attrnamespace,
|
|
const char *name);
|
|
|
|
int ext2_extattr_block_delete(struct inode *ip, int attrnamespace,
|
|
const char *name);
|
|
|
|
int ext2_extattr_free(struct inode *ip);
|
|
int ext2_extattr_inode_list(struct inode *ip, int attrnamespace,
|
|
struct uio *uio, size_t *size);
|
|
|
|
int ext2_extattr_block_list(struct inode *ip, int attrnamespace,
|
|
struct uio *uio, size_t *size);
|
|
|
|
int ext2_extattr_inode_get(struct inode *ip, int attrnamespace,
|
|
const char *name, struct uio *uio, size_t *size);
|
|
|
|
int ext2_extattr_block_get(struct inode *ip, int attrnamespace,
|
|
const char *name, struct uio *uio, size_t *size);
|
|
|
|
int ext2_extattr_inode_set(struct inode *ip, int attrnamespace,
|
|
const char *name, struct uio *uio);
|
|
|
|
int ext2_extattr_block_set(struct inode *ip, int attrnamespace,
|
|
const char *name, struct uio *uio);
|
|
|
|
int ext2_extattr_valid_attrname(int attrnamespace, const char *attrname);
|
|
|
|
#endif /* !_FS_EXT2FS_EXT2_EXTARTTR_H_ */
|