ext2fs_xattr.h revision 1.2.2.2
1 1.2.2.2 pgoyette /* $NetBSD: ext2fs_xattr.h,v 1.2.2.2 2016/09/14 03:04:19 pgoyette Exp $ */ 2 1.2.2.2 pgoyette 3 1.2.2.2 pgoyette /*- 4 1.2.2.2 pgoyette * Copyright (c) 2016 The NetBSD Foundation, Inc. 5 1.2.2.2 pgoyette * All rights reserved. 6 1.2.2.2 pgoyette * 7 1.2.2.2 pgoyette * This code is derived from software contributed to The NetBSD Foundation 8 1.2.2.2 pgoyette * by Jaromir Dolecek. 9 1.2.2.2 pgoyette * 10 1.2.2.2 pgoyette * Redistribution and use in source and binary forms, with or without 11 1.2.2.2 pgoyette * modification, are permitted provided that the following conditions 12 1.2.2.2 pgoyette * are met: 13 1.2.2.2 pgoyette * 1. Redistributions of source code must retain the above copyright 14 1.2.2.2 pgoyette * notice, this list of conditions and the following disclaimer. 15 1.2.2.2 pgoyette * 2. Redistributions in binary form must reproduce the above copyright 16 1.2.2.2 pgoyette * notice, this list of conditions and the following disclaimer in the 17 1.2.2.2 pgoyette * documentation and/or other materials provided with the distribution. 18 1.2.2.2 pgoyette * 19 1.2.2.2 pgoyette * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.2.2.2 pgoyette * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.2.2.2 pgoyette * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.2.2.2 pgoyette * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.2.2.2 pgoyette * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.2.2.2 pgoyette * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.2.2.2 pgoyette * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.2.2.2 pgoyette * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.2.2.2 pgoyette * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.2.2.2 pgoyette * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.2.2.2 pgoyette * POSSIBILITY OF SUCH DAMAGE. 30 1.2.2.2 pgoyette */ 31 1.2.2.2 pgoyette 32 1.2.2.2 pgoyette #ifndef _UFS_EXT2FS_EXT2FS_XATTR_H_ 33 1.2.2.2 pgoyette #define _UFS_EXT2FS_EXT2FS_XATTR_H_ 34 1.2.2.2 pgoyette 35 1.2.2.2 pgoyette #include <sys/cdefs.h> 36 1.2.2.2 pgoyette __KERNEL_RCSID(0, "$NetBSD: ext2fs_xattr.h,v 1.2.2.2 2016/09/14 03:04:19 pgoyette Exp $"); 37 1.2.2.2 pgoyette 38 1.2.2.2 pgoyette #ifdef _KERNEL 39 1.2.2.2 pgoyette 40 1.2.2.2 pgoyette #define EXT2FS_XATTR_MAGIC 0xEA020000 41 1.2.2.2 pgoyette 42 1.2.2.2 pgoyette #define EXT2FS_XATTR_NAME_LEN_MAX 255 43 1.2.2.2 pgoyette #define EXT2FS_XATTR_REFCOUNT_MAX 1024 44 1.2.2.2 pgoyette 45 1.2.2.2 pgoyette /* 46 1.2.2.2 pgoyette * This is used as header for extended attribute block within inode 47 1.2.2.2 pgoyette */ 48 1.2.2.2 pgoyette struct ext2fs_xattr_ibody_header { 49 1.2.2.2 pgoyette uint32_t h_magic; /* Magic number - 0xEA020000 */ 50 1.2.2.2 pgoyette }; 51 1.2.2.2 pgoyette 52 1.2.2.2 pgoyette /* 53 1.2.2.2 pgoyette * This is used as header for extended attribute on separate disk block 54 1.2.2.2 pgoyette */ 55 1.2.2.2 pgoyette struct ext2fs_xattr_header { 56 1.2.2.2 pgoyette uint32_t h_magic; /* Magic number - 0xEA020000 */ 57 1.2.2.2 pgoyette uint32_t h_refcount; /* Reference count */ 58 1.2.2.2 pgoyette uint32_t h_blocks; /* Number of blocks - only 1 supported */ 59 1.2.2.2 pgoyette uint32_t h_hash; /* Hash of all attributes */ 60 1.2.2.2 pgoyette uint32_t h_checksum; /* Checksum of the extended attribute block */ 61 1.2.2.2 pgoyette uint32_t h_reserved[3]; 62 1.2.2.2 pgoyette }; 63 1.2.2.2 pgoyette 64 1.2.2.2 pgoyette /* 65 1.2.2.2 pgoyette * Extended attribute on-disk header structure 66 1.2.2.2 pgoyette */ 67 1.2.2.2 pgoyette struct ext2fs_xattr_entry { 68 1.2.2.2 pgoyette uint8_t e_name_len; /* Name length */ 69 1.2.2.2 pgoyette uint8_t e_name_index; /* Name prefix index (see below) */ 70 1.2.2.2 pgoyette uint16_t e_value_offs; /* Offset of value within block */ 71 1.2.2.2 pgoyette uint32_t e_value_block; /* Value block - not supported (always zero) */ 72 1.2.2.2 pgoyette uint32_t e_value_size; /* Length of value */ 73 1.2.2.2 pgoyette uint32_t e_hash; /* Hash (not supported) */ 74 1.2.2.2 pgoyette char e_name[0]; /* Name string (e_name_len bytes) */ 75 1.2.2.2 pgoyette }; 76 1.2.2.2 pgoyette 77 1.2.2.2 pgoyette /* 78 1.2.2.2 pgoyette * Linux kernel checks only the 0, we also check that the current entry 79 1.2.2.2 pgoyette * doesn't overflow past end. 80 1.2.2.2 pgoyette */ 81 1.2.2.2 pgoyette #define EXT2FS_XATTR_IS_LAST_ENTRY(entry, end) \ 82 1.2.2.2 pgoyette (*((uint32_t *)(entry)) == 0 || (uintptr_t)EXT2FS_XATTR_NEXT(entry) > (uintptr_t)end) 83 1.2.2.2 pgoyette 84 1.2.2.2 pgoyette /* 85 1.2.2.2 pgoyette * Each ext2fs_xattr_entry starts on next 4-byte boundary, pad if necessary. 86 1.2.2.2 pgoyette */ 87 1.2.2.2 pgoyette #define EXT2FS_XATTR_PAD 4 88 1.2.2.2 pgoyette #define EXT2FS_XATTR_ROUND (EXT2FS_XATTR_PAD - 1) 89 1.2.2.2 pgoyette #define EXT2FS_XATTR_LEN(name_len) \ 90 1.2.2.2 pgoyette (((name_len) + EXT2FS_XATTR_ROUND + \ 91 1.2.2.2 pgoyette sizeof(struct ext2fs_xattr_entry)) & ~EXT2FS_XATTR_ROUND) 92 1.2.2.2 pgoyette #define EXT2FS_XATTR_NEXT(entry) \ 93 1.2.2.2 pgoyette (struct ext2fs_xattr_entry *)(((uint8_t *)(entry)) + EXT2FS_XATTR_LEN((entry)->e_name_len)) 94 1.2.2.2 pgoyette 95 1.2.2.2 pgoyette #define EXT2FS_XATTR_IFIRST(h) (void *)&(h)[1] 96 1.2.2.2 pgoyette #define EXT2FS_XATTR_BFIRST(h) EXT2FS_XATTR_IFIRST(h) 97 1.2.2.2 pgoyette 98 1.2.2.2 pgoyette /* 99 1.2.2.2 pgoyette * Name prefixes 100 1.2.2.2 pgoyette */ 101 1.2.2.2 pgoyette #define EXT2FS_XATTR_PREFIX_NONE 0 /* no prefix */ 102 1.2.2.2 pgoyette #define EXT2FS_XATTR_PREFIX_USER 1 /* "user." */ 103 1.2.2.2 pgoyette #define EXT2FS_XATTR_PREFIX_POSIX_ACCESS 2 /* "system.posix_acl_access" */ 104 1.2.2.2 pgoyette #define EXT2FS_XATTR_PREFIX_POSIX_DEFAULT1 3 /* "system.posix_acl_default" */ 105 1.2.2.2 pgoyette #define EXT2FS_XATTR_PREFIX_TRUSTED 4 /* "trusted." */ 106 1.2.2.2 pgoyette #define EXT2FS_XATTR_PREFIX_SECURITY 6 /* "security." */ 107 1.2.2.2 pgoyette #define EXT2FS_XATTR_PREFIX_SYSTEM 7 /* "system." */ 108 1.2.2.2 pgoyette #define EXT2FS_XATTR_PREFIX_SYSTEM_RICHACL 8 /* "system.richacl" */ 109 1.2.2.2 pgoyette #define EXT2FS_XATTR_PREFIX_ENCRYPTION 9 /* "c" */ 110 1.2.2.2 pgoyette 111 1.2.2.2 pgoyette int ext2fs_getextattr(void *); 112 1.2.2.2 pgoyette int ext2fs_setextattr(void *); 113 1.2.2.2 pgoyette int ext2fs_listextattr(void *); 114 1.2.2.2 pgoyette int ext2fs_deleteextattr(void *); 115 1.2.2.2 pgoyette #endif /* _KERNEL */ 116 1.2.2.2 pgoyette 117 1.2.2.2 pgoyette #endif /* _UFS_EXT2FS_EXT2FS_XATTR_H_ */ 118
Indexes created Mon Oct 20 03:09:53 GMT 2025