Differential D10151 Diff 26903 head/sys/fs/ext2fs/ext2_extattr.h

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head/sys/fs/ext2fs/ext2_extattr.h

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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

				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_IHDR(inode, raw_inode) \
				((struct ext4_xattr_ibody_header *) \
				((void *)raw_inode + \
				EXT4_GOOD_OLD_INODE_SIZE + \
				EXT4_I(inode)->i_extra_isize))

				#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_NEXT(entry) \
				( (struct ext2fs_extattr_entry *)( \
				(char *)(entry) + EXT2_EXTATTR_LEN((entry)->e_name_len)) )

				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);

				#endif /* !_FS_EXT2FS_EXT2_EXTARTTR_H_ */