#include <sys/param.h>
#ifndef KERNEL
#include <ufs/ufs/dinode.h>
#include <ufs/ffs/fs.h>
#else
#include <sys/systm.h>
#include <sys/vnode.h>
#include <sys/buf.h>
#include <ufs/ufs/quota.h>
#include <ufs/ufs/inode.h>
#include <ufs/ffs/fs.h>
#include <ufs/ffs/ffs_extern.h>
int
ffs_blkatoff(ap)
struct vop_blkatoff_args *ap;
{
struct inode *ip;
register struct fs *fs;
struct buf *bp;
ufs_daddr_t lbn;
int bsize, error;
ip = VTOI(ap->a_vp);
fs = ip->i_fs;
lbn = lblkno(fs, ap->a_offset);
bsize = blksize(fs, ip, lbn);
*ap->a_bpp = NULL;
if (error = bread(ap->a_vp, lbn, bsize, NOCRED, &bp)) {
brelse(bp);
return (error);
}
if (ap->a_res)
*ap->a_res = (char *)bp->b_data + blkoff(fs, ap->a_offset);
*ap->a_bpp = bp;
return (0);
}
#endif
extern int around[];
extern int inside[];
extern u_char *fragtbl[];
void
ffs_fragacct(fs, fragmap, fraglist, cnt)
struct fs *fs;
int fragmap;
int32_t fraglist[];
int cnt;
{
int inblk;
register int field, subfield;
register 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;
}
}
}
#if defined(KERNEL) && DIAGNOSTIC
void
ffs_checkoverlap(bp, ip)
struct buf *bp;
struct inode *ip;
{
register struct buf *ebp, *ep;
register ufs_daddr_t start, last;
struct vnode *vp;
ebp = &buf[nbuf];
start = bp->b_blkno;
#ifdef __APPLE__
last = start + btodb(bp->b_bcount, dev_bsize) - 1;
#else
last = start + btodb(bp->b_bcount) - 1;
#endif
for (ep = buf; ep < ebp; ep++) {
if (ep == bp || (ep->b_flags & B_INVAL) ||
ep->b_vp == NULLVP)
continue;
if (VOP_BMAP(ep->b_vp, (ufs_daddr_t)0, &vp, (ufs_daddr_t)0,
NULL))
continue;
if (vp != ip->i_devvp)
continue;
#ifdef __APPLE__
if (ep->b_bcount == 0 || ep->b_blkno > last ||
ep->b_blkno + btodb(ep->b_bcount, dev_bsize) <= start)
#else
if (ep->b_bcount == 0 || ep->b_blkno > last ||
ep->b_blkno + btodb(ep->b_bcount) <= start)
#endif
continue;
vprint("Disk overlap", vp);
(void)printf("\tstart %d, end %d overlap start %d, end %d\n",
start, last, ep->b_blkno,
#ifdef __APPLE__
ep->b_blkno + btodb(ep->b_bcount, dev_bsize) - 1);
#else
ep->b_blkno + btodb(ep->b_bcount) - 1);
#endif
panic("Disk buffer overlap");
}
}
#endif
#ifdef NOT_USED
int
ffs_isblock(fs, cp, h)
struct fs *fs;
unsigned char *cp;
ufs_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");
}
}
void
ffs_clrblock(fs, cp, h)
struct fs *fs;
u_char *cp;
ufs_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");
}
}
void
ffs_setblock(fs, cp, h)
struct fs *fs;
unsigned char *cp;
ufs_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");
}
}
#endif NOT_USED