1 /* $NetBSD: ulfs_extattr.h,v 1.3 2016/06/20 01:56:21 dholland Exp $ */ 2 /* from NetBSD: extattr.h,v 1.11 2014/12/19 10:59:21 manu Exp */ 3 4 /*- 5 * Copyright (c) 1999-2001 Robert N. M. Watson 6 * All rights reserved. 7 * 8 * This software was developed by Robert Watson for the TrustedBSD Project. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * $FreeBSD: src/sys/ufs/ufs/extattr.h,v 1.20 2005/01/31 08:16:45 imp Exp $ 32 */ 33 34 /* 35 * Support for file system extended attributes on the ULFS1 file system. 36 * Developed by the TrustedBSD Project. 37 */ 38 39 #ifndef _UFS_LFS_ULFS_EXTATTR_H_ 40 #define _UFS_LFS_ULFS_EXTATTR_H_ 41 42 #define ULFS_EXTATTR_MAGIC 0x00b5d5ec 43 #define ULFS_EXTATTR_VERSION 0x00000003 44 #define ULFS_EXTATTR_FSROOTSUBDIR ".attribute" 45 #define ULFS_EXTATTR_SUBDIR_SYSTEM "system" 46 #define ULFS_EXTATTR_SUBDIR_USER "user" 47 #define ULFS_EXTATTR_MAXEXTATTRNAME 256 /* including null */ 48 49 #define ULFS_EXTATTR_ATTR_FLAG_INUSE 0x00000001 /* attr has been set */ 50 #define ULFS_EXTATTR_PERM_KERNEL 0x00000000 51 #define ULFS_EXTATTR_PERM_ROOT 0x00000001 52 #define ULFS_EXTATTR_PERM_OWNER 0x00000002 53 #define ULFS_EXTATTR_PERM_ANYONE 0x00000003 54 55 #define ULFS_EXTATTR_UEPM_INITIALIZED 0x00000001 56 #define ULFS_EXTATTR_UEPM_STARTED 0x00000002 57 58 #define ULFS_EXTATTR_CMD_START EXTATTR_CMD_START 59 #define ULFS_EXTATTR_CMD_STOP EXTATTR_CMD_STOP 60 #define ULFS_EXTATTR_CMD_ENABLE 0x00000003 61 #define ULFS_EXTATTR_CMD_DISABLE 0x00000004 62 63 struct ulfs_extattr_fileheader { 64 uint32_t uef_magic; /* magic number for sanity checking */ 65 uint32_t uef_version; /* version of attribute file */ 66 uint32_t uef_size; /* size of attributes, w/o header */ 67 }; 68 69 struct ulfs_extattr_header { 70 uint32_t ueh_flags; /* flags for attribute */ 71 uint32_t ueh_len; /* local defined length; <= uef_size */ 72 uint32_t ueh_i_gen; /* generation number for sanity */ 73 /* data follows the header */ 74 }; 75 76 #ifdef _KERNEL 77 78 #ifdef MALLOC_DECLARE 79 MALLOC_DECLARE(M_EXTATTR); 80 #endif 81 82 struct vnode; 83 LIST_HEAD(ulfs_extattr_list_head, ulfs_extattr_list_entry); 84 struct ulfs_extattr_list_entry { 85 LIST_ENTRY(ulfs_extattr_list_entry) uele_entries; 86 struct ulfs_extattr_fileheader uele_fileheader; 87 int uele_attrnamespace; 88 char uele_attrname[ULFS_EXTATTR_MAXEXTATTRNAME]; 89 struct vnode *uele_backing_vnode; 90 int uele_flags; 91 }; 92 93 /* uele_flags */ 94 #define UELE_F_NEEDSWAP 0x01 /* needs byte swap */ 95 96 #define UELE_NEEDSWAP(uele) ((uele)->uele_flags & UELE_F_NEEDSWAP) 97 98 struct lock; 99 struct ulfs_extattr_per_mount { 100 kmutex_t uepm_lock; 101 struct ulfs_extattr_list_head uepm_list; 102 kauth_cred_t uepm_ucred; 103 int uepm_lockcnt; 104 int uepm_flags; 105 }; 106 107 void ulfs_extattr_uepm_init(struct ulfs_extattr_per_mount *uepm); 108 void ulfs_extattr_uepm_destroy(struct ulfs_extattr_per_mount *uepm); 109 int ulfs_extattr_start(struct mount *mp, struct lwp *l); 110 int ulfs_extattr_autostart(struct mount *mp, struct lwp *l); 111 void ulfs_extattr_stop(struct mount *mp, struct lwp *l); 112 int ulfs_extattrctl(struct mount *mp, int cmd, struct vnode *filename, 113 int attrnamespace, const char *attrname); 114 struct vop_getextattr_args; 115 int ulfs_getextattr(struct vop_getextattr_args *ap); 116 struct vop_deleteextattr_args; 117 int ulfs_deleteextattr(struct vop_deleteextattr_args *ap); 118 struct vop_setextattr_args; 119 int ulfs_setextattr(struct vop_setextattr_args *ap); 120 struct vop_listextattr_args; 121 int ulfs_listextattr(struct vop_listextattr_args *ap); 122 void ulfs_extattr_vnode_inactive(struct vnode *vp, struct lwp *l); 123 124 void ulfs_extattr_init(void); 125 void ulfs_extattr_done(void); 126 127 #endif /* !_KERNEL */ 128 129 #endif /* !_UFS_LFS_ULFS_EXTATTR_H_ */ 130