255 lines
6.5 KiB
C
255 lines
6.5 KiB
C
/* $NetBSD: ffs_subr.c,v 1.43 2006/11/16 01:33:53 christos Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1982, 1986, 1989, 1993
|
|
* The Regents of the University of California. 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.
|
|
* 3. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* 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.
|
|
*
|
|
* @(#)ffs_subr.c 8.5 (Berkeley) 3/21/95
|
|
*/
|
|
|
|
#if HAVE_NBTOOL_CONFIG_H
|
|
#include "nbtool_config.h"
|
|
#endif
|
|
|
|
#include <sys/cdefs.h>
|
|
__KERNEL_RCSID(0, "$NetBSD: ffs_subr.c,v 1.43 2006/11/16 01:33:53 christos Exp $");
|
|
|
|
#include <sys/param.h>
|
|
|
|
/* in ffs_tables.c */
|
|
extern const int inside[], around[];
|
|
extern const u_char * const fragtbl[];
|
|
|
|
#ifndef _KERNEL
|
|
#include <ufs/ufs/dinode.h>
|
|
#include <ufs/ffs/fs.h>
|
|
#include <ufs/ffs/ffs_extern.h>
|
|
#include <ufs/ufs/ufs_bswap.h>
|
|
void panic(const char *, ...)
|
|
__attribute__((__noreturn__,__format__(__printf__,1,2)));
|
|
|
|
#else /* _KERNEL */
|
|
#include <sys/systm.h>
|
|
#include <sys/vnode.h>
|
|
#include <sys/mount.h>
|
|
#include <sys/buf.h>
|
|
#include <sys/inttypes.h>
|
|
#include <sys/pool.h>
|
|
#include <ufs/ufs/inode.h>
|
|
#include <ufs/ufs/ufsmount.h>
|
|
#include <ufs/ufs/ufs_extern.h>
|
|
#include <ufs/ffs/fs.h>
|
|
#include <ufs/ffs/ffs_extern.h>
|
|
#include <ufs/ufs/ufs_bswap.h>
|
|
|
|
/*
|
|
* Load up the contents of an inode and copy the appropriate pieces
|
|
* to the incore copy.
|
|
*/
|
|
void
|
|
ffs_load_inode(struct buf *bp, struct inode *ip, struct fs *fs, ino_t ino)
|
|
{
|
|
struct ufs1_dinode *dp1;
|
|
struct ufs2_dinode *dp2;
|
|
|
|
if (ip->i_ump->um_fstype == UFS1) {
|
|
dp1 = (struct ufs1_dinode *)bp->b_data + ino_to_fsbo(fs, ino);
|
|
#ifdef FFS_EI
|
|
if (UFS_FSNEEDSWAP(fs))
|
|
ffs_dinode1_swap(dp1, ip->i_din.ffs1_din);
|
|
else
|
|
#endif
|
|
*ip->i_din.ffs1_din = *dp1;
|
|
|
|
ip->i_mode = ip->i_ffs1_mode;
|
|
ip->i_nlink = ip->i_ffs1_nlink;
|
|
ip->i_size = ip->i_ffs1_size;
|
|
ip->i_flags = ip->i_ffs1_flags;
|
|
ip->i_gen = ip->i_ffs1_gen;
|
|
ip->i_uid = ip->i_ffs1_uid;
|
|
ip->i_gid = ip->i_ffs1_gid;
|
|
} else {
|
|
dp2 = (struct ufs2_dinode *)bp->b_data + ino_to_fsbo(fs, ino);
|
|
#ifdef FFS_EI
|
|
if (UFS_FSNEEDSWAP(fs))
|
|
ffs_dinode2_swap(dp2, ip->i_din.ffs2_din);
|
|
else
|
|
#endif
|
|
*ip->i_din.ffs2_din = *dp2;
|
|
|
|
ip->i_mode = ip->i_ffs2_mode;
|
|
ip->i_nlink = ip->i_ffs2_nlink;
|
|
ip->i_size = ip->i_ffs2_size;
|
|
ip->i_flags = ip->i_ffs2_flags;
|
|
ip->i_gen = ip->i_ffs2_gen;
|
|
ip->i_uid = ip->i_ffs2_uid;
|
|
ip->i_gid = ip->i_ffs2_gid;
|
|
}
|
|
}
|
|
|
|
#endif /* _KERNEL */
|
|
|
|
/*
|
|
* Update the frsum fields to reflect addition or deletion
|
|
* of some frags.
|
|
*/
|
|
void
|
|
ffs_fragacct(struct fs *fs, int fragmap, int32_t fraglist[], int cnt,
|
|
int needswap)
|
|
{
|
|
int inblk;
|
|
int field, subfield;
|
|
int siz, pos;
|
|
|
|
inblk = (int)(fragtbl[fs->fs_frag][fragmap]) << 1;
|
|
fragmap <<= 1;
|
|
for (siz = 1; siz < fs->fs_frag; siz++) {
|
|
if ((inblk & (1 << (siz + (fs->fs_frag & (NBBY - 1))))) == 0)
|
|
continue;
|
|
field = around[siz];
|
|
subfield = inside[siz];
|
|
for (pos = siz; pos <= fs->fs_frag; pos++) {
|
|
if ((fragmap & field) == subfield) {
|
|
fraglist[siz] = ufs_rw32(
|
|
ufs_rw32(fraglist[siz], needswap) + cnt,
|
|
needswap);
|
|
pos += siz;
|
|
field <<= siz;
|
|
subfield <<= siz;
|
|
}
|
|
field <<= 1;
|
|
subfield <<= 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* block operations
|
|
*
|
|
* check if a block is available
|
|
* returns true if all the correponding bits in the free map are 1
|
|
* returns false if any corresponding bit in the free map is 0
|
|
*/
|
|
int
|
|
ffs_isblock(struct fs *fs, u_char *cp, int32_t h)
|
|
{
|
|
u_char mask;
|
|
|
|
switch ((int)fs->fs_fragshift) {
|
|
case 3:
|
|
return (cp[h] == 0xff);
|
|
case 2:
|
|
mask = 0x0f << ((h & 0x1) << 2);
|
|
return ((cp[h >> 1] & mask) == mask);
|
|
case 1:
|
|
mask = 0x03 << ((h & 0x3) << 1);
|
|
return ((cp[h >> 2] & mask) == mask);
|
|
case 0:
|
|
mask = 0x01 << (h & 0x7);
|
|
return ((cp[h >> 3] & mask) == mask);
|
|
default:
|
|
panic("ffs_isblock: unknown fs_fragshift %d",
|
|
(int)fs->fs_fragshift);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* check if a block is completely allocated
|
|
* returns true if all the corresponding bits in the free map are 0
|
|
* returns false if any corresponding bit in the free map is 1
|
|
*/
|
|
int
|
|
ffs_isfreeblock(struct fs *fs, u_char *cp, int32_t h)
|
|
{
|
|
|
|
switch ((int)fs->fs_fragshift) {
|
|
case 3:
|
|
return (cp[h] == 0);
|
|
case 2:
|
|
return ((cp[h >> 1] & (0x0f << ((h & 0x1) << 2))) == 0);
|
|
case 1:
|
|
return ((cp[h >> 2] & (0x03 << ((h & 0x3) << 1))) == 0);
|
|
case 0:
|
|
return ((cp[h >> 3] & (0x01 << (h & 0x7))) == 0);
|
|
default:
|
|
panic("ffs_isfreeblock: unknown fs_fragshift %d",
|
|
(int)fs->fs_fragshift);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* take a block out of the map
|
|
*/
|
|
void
|
|
ffs_clrblock(struct fs *fs, u_char *cp, int32_t h)
|
|
{
|
|
|
|
switch ((int)fs->fs_fragshift) {
|
|
case 3:
|
|
cp[h] = 0;
|
|
return;
|
|
case 2:
|
|
cp[h >> 1] &= ~(0x0f << ((h & 0x1) << 2));
|
|
return;
|
|
case 1:
|
|
cp[h >> 2] &= ~(0x03 << ((h & 0x3) << 1));
|
|
return;
|
|
case 0:
|
|
cp[h >> 3] &= ~(0x01 << (h & 0x7));
|
|
return;
|
|
default:
|
|
panic("ffs_clrblock: unknown fs_fragshift %d",
|
|
(int)fs->fs_fragshift);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* put a block into the map
|
|
*/
|
|
void
|
|
ffs_setblock(struct fs *fs, u_char *cp, int32_t h)
|
|
{
|
|
|
|
switch ((int)fs->fs_fragshift) {
|
|
case 3:
|
|
cp[h] = 0xff;
|
|
return;
|
|
case 2:
|
|
cp[h >> 1] |= (0x0f << ((h & 0x1) << 2));
|
|
return;
|
|
case 1:
|
|
cp[h >> 2] |= (0x03 << ((h & 0x3) << 1));
|
|
return;
|
|
case 0:
|
|
cp[h >> 3] |= (0x01 << (h & 0x7));
|
|
return;
|
|
default:
|
|
panic("ffs_setblock: unknown fs_fragshift %d",
|
|
(int)fs->fs_fragshift);
|
|
}
|
|
}
|