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/*-
* 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 */
uint32_t h_reserved[4]; /* 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_ */
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