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add comments and tweak code a little for readability. 

(no behaviour changes)
This commit is contained in:
yamt 2003-10-17 14:20:12 +00:00
parent a747a8f16d
commit 818ef92da6
1 changed files with 22 additions and 16 deletions
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38
sys/ufs/lfs/lfs_segment.c
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@ -1,4 +1,4 @@
/* $NetBSD: lfs_segment.c,v 1.138 2003/10/14 12:51:31 yamt Exp $ */
/* $NetBSD: lfs_segment.c,v 1.139 2003/10/17 14:20:12 yamt Exp $ */
/*-
* Copyright (c) 1999, 2000, 2001, 2002, 2003 The NetBSD Foundation, Inc.
@ -67,7 +67,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: lfs_segment.c,v 1.138 2003/10/14 12:51:31 yamt Exp $");
__KERNEL_RCSID(0, "$NetBSD: lfs_segment.c,v 1.139 2003/10/17 14:20:12 yamt Exp $");
#define ivndebug(vp,str) printf("ino %d: %s\n",VTOI(vp)->i_number,(str))
@ -1417,23 +1417,24 @@ lfs_updatemeta(struct segment *sp)
}
/*
* Start a new segment.
* Start a new partial segment.
*
* Return 1 when we entered to a new segment.
* Otherwise, return 0.
*/
int
lfs_initseg(struct lfs *fs)
{
struct segment *sp;
SEGUSE *sup;
struct segment *sp = fs->lfs_sp;
SEGSUM *ssp;
struct buf *bp, *sbp;
int repeat;
sp = fs->lfs_sp;
repeat = 0;
struct buf *sbp; /* buffer for SEGSUM */
int repeat = 0; /* return value */
/* Advance to the next segment. */
if (!LFS_PARTIAL_FITS(fs)) {
SEGUSE *sup;
struct buf *bp;
/* lfs_avail eats the remaining space */
fs->lfs_avail -= fs->lfs_fsbpseg - (fs->lfs_offset -
fs->lfs_curseg);
@ -1491,17 +1492,22 @@ lfs_initseg(struct lfs *fs)
sp->ninodes = 0;
sp->ndupino = 0;
/* Get a new buffer for SEGSUM and enter it into the buffer list. */
sp->cbpp = sp->bpp;
/* Get a new buffer for SEGSUM */
sbp = *sp->cbpp = lfs_newbuf(fs, VTOI(fs->lfs_ivnode)->i_devvp,
fsbtodb(fs, fs->lfs_offset), fs->lfs_sumsize, LFS_NB_SUMMARY);
sp->segsum = (*sp->cbpp)->b_data;
memset(sp->segsum, 0, fs->lfs_sumsize);
sp->start_bpp = ++sp->cbpp;
/* ... and enter it into the buffer list. */
*sp->cbpp = sbp;
sp->cbpp++;
fs->lfs_offset += btofsb(fs, fs->lfs_sumsize);
sp->start_bpp = sp->cbpp;
/* Set point to SEGSUM, initialize it. */
ssp = sp->segsum;
ssp = sp->segsum = sbp->b_data;
memset(ssp, 0, fs->lfs_sumsize);
ssp->ss_next = fs->lfs_nextseg;
ssp->ss_nfinfo = ssp->ss_ninos = 0;
ssp->ss_magic = SS_MAGIC;