freebsd-dev/sys/ufs/ffs/ffs_subr.c
Kirk McKusick 1c85e6a35d This commit adds basic support for the UFS2 filesystem. The UFS2
filesystem expands the inode to 256 bytes to make space for 64-bit
block pointers. It also adds a file-creation time field, an ability
to use jumbo blocks per inode to allow extent like pointer density,
and space for extended attributes (up to twice the filesystem block
size worth of attributes, e.g., on a 16K filesystem, there is space
for 32K of attributes). UFS2 fully supports and runs existing UFS1
filesystems. New filesystems built using newfs can be built in either
UFS1 or UFS2 format using the -O option. In this commit UFS1 is
the default format, so if you want to build UFS2 format filesystems,
you must specify -O 2. This default will be changed to UFS2 when
UFS2 proves itself to be stable. In this commit the boot code for
reading UFS2 filesystems is not compiled (see /sys/boot/common/ufsread.c)
as there is insufficient space in the boot block. Once the size of the
boot block is increased, this code can be defined.

Things to note: the definition of SBSIZE has changed to SBLOCKSIZE.
The header file <ufs/ufs/dinode.h> must be included before
<ufs/ffs/fs.h> so as to get the definitions of ufs2_daddr_t and
ufs_lbn_t.

Still TODO:
Verify that the first level bootstraps work for all the architectures.
Convert the utility ffsinfo to understand UFS2 and test growfs.
Add support for the extended attribute storage. Update soft updates
to ensure integrity of extended attribute storage. Switch the
current extended attribute interfaces to use the extended attribute
storage. Add the extent like functionality (framework is there,
but is currently never used).

Sponsored by: DARPA & NAI Labs.
Reviewed by:	Poul-Henning Kamp <phk@freebsd.org>
2002-06-21 06:18:05 +00:00

323 lines
7.5 KiB
C

/*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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
* $FreeBSD$
*/
#include <sys/param.h>
#ifndef _KERNEL
#include <ufs/ufs/dinode.h>
#include <ufs/ffs/fs.h>
#else
#include "opt_ddb.h"
#include <sys/systm.h>
#include <sys/stdint.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mount.h>
#include <sys/vnode.h>
#include <sys/bio.h>
#include <sys/buf.h>
#include <sys/ucred.h>
#include <ufs/ufs/quota.h>
#include <ufs/ufs/inode.h>
#include <ufs/ufs/extattr.h>
#include <ufs/ufs/ufsmount.h>
#include <ufs/ufs/ufs_extern.h>
#include <ufs/ffs/ffs_extern.h>
#include <ufs/ffs/fs.h>
#ifdef DDB
void ffs_checkoverlap(struct buf *, struct inode *);
#endif
/*
* Return buffer with the contents of block "offset" from the beginning of
* directory "ip". If "res" is non-zero, fill it in with a pointer to the
* remaining space in the directory.
*/
int
ffs_blkatoff(vp, offset, res, bpp)
struct vnode *vp;
off_t offset;
char **res;
struct buf **bpp;
{
struct inode *ip;
struct fs *fs;
struct buf *bp;
ufs_lbn_t lbn;
int bsize, error;
ip = VTOI(vp);
fs = ip->i_fs;
lbn = lblkno(fs, offset);
bsize = blksize(fs, ip, lbn);
*bpp = NULL;
error = bread(vp, lbn, bsize, NOCRED, &bp);
if (error) {
brelse(bp);
return (error);
}
if (res)
*res = (char *)bp->b_data + blkoff(fs, offset);
*bpp = bp;
return (0);
}
/*
* Load up the contents of an inode and copy the appropriate pieces
* to the incore copy.
*/
void
ffs_load_inode(bp, ip, mtype, fs, ino)
struct buf *bp;
struct inode *ip;
struct malloc_type *mtype;
struct fs *fs;
ino_t ino;
{
if (ip->i_ump->um_fstype == UFS1) {
if (mtype != NULL)
MALLOC(ip->i_din1, struct ufs1_dinode *,
sizeof(struct ufs1_dinode), mtype, M_WAITOK);
*ip->i_din1 =
*((struct ufs1_dinode *)bp->b_data + ino_to_fsbo(fs, ino));
ip->i_mode = ip->i_din1->di_mode;
ip->i_nlink = ip->i_din1->di_nlink;
ip->i_size = ip->i_din1->di_size;
ip->i_flags = ip->i_din1->di_flags;
ip->i_gen = ip->i_din1->di_gen;
ip->i_uid = ip->i_din1->di_uid;
ip->i_gid = ip->i_din1->di_gid;
} else {
if (mtype != NULL)
MALLOC(ip->i_din2, struct ufs2_dinode *,
sizeof(struct ufs2_dinode), mtype, M_WAITOK);
*ip->i_din2 =
*((struct ufs2_dinode *)bp->b_data + ino_to_fsbo(fs, ino));
ip->i_mode = ip->i_din2->di_mode;
ip->i_nlink = ip->i_din2->di_nlink;
ip->i_size = ip->i_din2->di_size;
ip->i_flags = ip->i_din2->di_flags;
ip->i_gen = ip->i_din2->di_gen;
ip->i_uid = ip->i_din2->di_uid;
ip->i_gid = ip->i_din2->di_gid;
}
}
#endif /* KERNEL */
/*
* Update the frsum fields to reflect addition or deletion
* of some frags.
*/
void
ffs_fragacct(fs, fragmap, fraglist, cnt)
struct fs *fs;
int fragmap;
int32_t fraglist[];
int cnt;
{
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)))) == 0)
continue;
field = around[siz];
subfield = inside[siz];
for (pos = siz; pos <= fs->fs_frag; pos++) {
if ((fragmap & field) == subfield) {
fraglist[siz] += cnt;
pos += siz;
field <<= siz;
subfield <<= siz;
}
field <<= 1;
subfield <<= 1;
}
}
}
#ifdef DDB
void
ffs_checkoverlap(bp, ip)
struct buf *bp;
struct inode *ip;
{
struct buf *ebp, *ep;
ufs2_daddr_t start, last;
struct vnode *vp;
ebp = &buf[nbuf];
start = bp->b_blkno;
last = start + btodb(bp->b_bcount) - 1;
for (ep = buf; ep < ebp; ep++) {
if (ep == bp || (ep->b_flags & B_INVAL) ||
ep->b_vp == NULLVP)
continue;
vp = ip->i_devvp;
/* look for overlap */
if (ep->b_bcount == 0 || ep->b_blkno > last ||
ep->b_blkno + btodb(ep->b_bcount) <= start)
continue;
vprint("Disk overlap", vp);
printf("\tstart %llu, end %llu overlap start %llu, end %llu\n",
(intmax_t)start, (intmax_t)last, (intmax_t)ep->b_blkno,
(intmax_t)(ep->b_blkno + btodb(ep->b_bcount) - 1));
panic("ffs_checkoverlap: Disk buffer overlap");
}
}
#endif /* DDB */
/*
* block operations
*
* check if a block is available
*/
int
ffs_isblock(fs, cp, h)
struct fs *fs;
unsigned char *cp;
ufs1_daddr_t h;
{
unsigned char mask;
switch ((int)fs->fs_frag) {
case 8:
return (cp[h] == 0xff);
case 4:
mask = 0x0f << ((h & 0x1) << 2);
return ((cp[h >> 1] & mask) == mask);
case 2:
mask = 0x03 << ((h & 0x3) << 1);
return ((cp[h >> 2] & mask) == mask);
case 1:
mask = 0x01 << (h & 0x7);
return ((cp[h >> 3] & mask) == mask);
default:
panic("ffs_isblock");
}
return (0);
}
/*
* check if a block is free
*/
int
ffs_isfreeblock(fs, cp, h)
struct fs *fs;
unsigned char *cp;
ufs1_daddr_t h;
{
switch ((int)fs->fs_frag) {
case 8:
return (cp[h] == 0);
case 4:
return ((cp[h >> 1] & (0x0f << ((h & 0x1) << 2))) == 0);
case 2:
return ((cp[h >> 2] & (0x03 << ((h & 0x3) << 1))) == 0);
case 1:
return ((cp[h >> 3] & (0x01 << (h & 0x7))) == 0);
default:
panic("ffs_isfreeblock");
}
return (0);
}
/*
* take a block out of the map
*/
void
ffs_clrblock(fs, cp, h)
struct fs *fs;
u_char *cp;
ufs1_daddr_t h;
{
switch ((int)fs->fs_frag) {
case 8:
cp[h] = 0;
return;
case 4:
cp[h >> 1] &= ~(0x0f << ((h & 0x1) << 2));
return;
case 2:
cp[h >> 2] &= ~(0x03 << ((h & 0x3) << 1));
return;
case 1:
cp[h >> 3] &= ~(0x01 << (h & 0x7));
return;
default:
panic("ffs_clrblock");
}
}
/*
* put a block into the map
*/
void
ffs_setblock(fs, cp, h)
struct fs *fs;
unsigned char *cp;
ufs1_daddr_t h;
{
switch ((int)fs->fs_frag) {
case 8:
cp[h] = 0xff;
return;
case 4:
cp[h >> 1] |= (0x0f << ((h & 0x1) << 2));
return;
case 2:
cp[h >> 2] |= (0x03 << ((h & 0x3) << 1));
return;
case 1:
cp[h >> 3] |= (0x01 << (h & 0x7));
return;
default:
panic("ffs_setblock");
}
}