| vfs_mount.c (4370) | vfs_mount.c (10358) |
|---|---|
| 1/* 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. | 1/* 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. |
| 4 * Copyright (c) 1995 Artisoft, Inc. All Rights Reserved. |
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| 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the --- 14 unchanged lines hidden (view full) --- 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)vfs_conf.c 8.8 (Berkeley) 3/31/94 | 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the --- 14 unchanged lines hidden (view full) --- 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)vfs_conf.c 8.8 (Berkeley) 3/31/94 |
| 34 * $Id: vfs_conf.c,v 1.5 1994/09/21 03:46:47 wollman Exp $ | 35 * $Id: vfs_conf.c,v 1.6 1994/11/12 01:47:43 phk Exp $ |
| 35 */ 36 | 36 */ 37 |
| 37#include <sys/param.h> 38#include <sys/mount.h> 39#include <sys/vnode.h> | 38/* 39 * PURPOSE: This file abstracts the root mounting interface from 40 * the per file system semantics for handling mounts, 41 * the overall intent of which is to move the BSD 42 * internals dependence out of the FS code, both to 43 * make the FS code more portable and to free up some 44 * of the BSD internals so that they may more easily 45 * be changed. 46 * 47 * NOTE1: Code is single entry/single exit to aid debugging 48 * and conversion for kernel multithreading. 49 * 50 * NOTE2: Code notes lock state in headers on entry and exit 51 * as an aid to conversion for kernel multithreading 52 * on SMP reentrancy 53 */ 54#include <sys/param.h> /* dev_t (types.h)*/ 55#include <sys/systm.h> /* rootvp*/ 56#include <sys/proc.h> /* curproc*/ 57#include <sys/vnode.h> /* NULLVP*/ 58#include <sys/mount.h> /* struct mount*/ 59#include <sys/malloc.h> /* M_MOUNT*/ |
| 40 | 60 |
| 41int (*mountroot) __P((void)); | 61/* 62 * GLOBALS 63 */ 64int (*mountroot) __P((caddr_t)); |
| 42struct vnode *rootvnode; | 65struct vnode *rootvnode; |
| 66struct vfsops *mountrootvfsops; |
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| 43 | 67 |
| 68 69/* 70 * Common root mount code shared by all filesystems 71 */ 72#define ROOTDIR "/" 73#define ROOTNAME "root_device" 74 75 76 77/* 78 * vfs_mountroot 79 * 80 * Common entry point for root mounts 81 * 82 * PARAMETERS: 83 * data pointer to the vfs_ops for the FS type mounting 84 * 85 * RETURNS: 0 Success 86 * !0 error number (errno.h) 87 * 88 * LOCK STATE: 89 * ENTRY 90 * <no locks held> 91 * EXIT 92 * <no locks held> 93 * 94 * NOTES: 95 * This code is currently supported only for use for 96 * the FFS file system type. This is a matter of 97 * fixing the other file systems, not this code! 98 */ 99int 100vfs_mountroot( data) 101caddr_t *data; /* file system function table*/ 102{ 103 struct mount *mp; 104 u_int size; 105 int err = 0; 106 struct proc *p = curproc; /* XXX */ 107 register struct fs *fs; 108 struct vfsops *mnt_op = (struct vfsops *)data; 109 110 /* 111 * New root mount structure 112 */ 113 mp = malloc((u_long)sizeof(struct mount), M_MOUNT, M_WAITOK); 114 bzero((char *)mp, (u_long)sizeof(struct mount)); 115 mp->mnt_op = mnt_op; 116 mp->mnt_flag = MNT_ROOTFS; 117 mp->mnt_vnodecovered = NULLVP; 118 119 /* 120 * Lock mount point 121 */ 122 if( ( err = vfs_lock(mp)) != 0) 123 goto error_1; 124 125 /* Save "last mounted on" info for mount point (NULL pad)*/ 126 copystr( ROOTDIR, /* mount point*/ 127 mp->mnt_stat.f_mntonname, /* save area*/ 128 MNAMELEN - 1, /* max size*/ 129 &size); /* real size*/ 130 bzero( mp->mnt_stat.f_mntonname + size, MNAMELEN - size); 131 132 /* Save "mounted from" info for mount point (NULL pad)*/ 133 copystr( ROOTNAME, /* device name*/ 134 mp->mnt_stat.f_mntfromname, /* save area*/ 135 MNAMELEN - 1, /* max size*/ 136 &size); /* real size*/ 137 bzero( mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 138 139 /* 140 * Attempt the mount 141 */ 142 err = VFS_MOUNT( mp, NULL, NULL, NULL, p); 143 if( err) 144 goto error_2; 145 146 /* Add fs to list of mounted file systems*/ 147 CIRCLEQ_INSERT_TAIL( &mountlist, mp, mnt_list); 148 149 /* Unlock mount point*/ 150 vfs_unlock(mp); 151 152 /* root mount, update system time from FS specific data*/ 153 inittodr( mp->mnt_time); 154 155 goto success; 156 157 158error_2: /* mount error*/ 159 160 /* unlock before failing*/ 161 vfs_unlock( mp); 162 163error_1: /* lock error*/ 164 165 /* free mount struct before failing*/ 166 free( mp, M_MOUNT); 167 168success: 169 return( err); 170} 171 172 173/* 174 * EOF -- This file has not been truncated. 175 */ |
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