Aren/NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Randomise di_igen for the first 2 blocks of inodes for non-UFS2 filesystems.

Browse Source 
Randomise di_igen for "/" (and lost+found) for UFS2 filesystems.
Ensure nothing from the lost+found inode leaks into the / inode.
This commit is contained in:
dsl 2003-09-03 17:08:58 +00:00
parent 4b3391a2a6
commit 36aa427d2c
1 changed files with 22 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

46
sbin/newfs/mkfs.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: mkfs.c,v 1.74 2003/08/21 14:55:03 dsl Exp $ */
/* $NetBSD: mkfs.c,v 1.75 2003/09/03 17:08:58 dsl Exp $ */
/*
* Copyright (c) 1980, 1989, 1993
@ -73,7 +73,7 @@
#if 0
static char sccsid[] = "@(#)mkfs.c 8.11 (Berkeley) 5/3/95";
#else
__RCSID("$NetBSD: mkfs.c,v 1.74 2003/08/21 14:55:03 dsl Exp $");
__RCSID("$NetBSD: mkfs.c,v 1.75 2003/09/03 17:08:58 dsl Exp $");
#endif
#endif /* not lint */
@ -660,25 +660,22 @@ initcg(int cylno, const struct timeval *tv)
}
}
memset(&acg, 0, sblock.fs_cgsize);
acg.cg_time = tv->tv_sec;
acg.cg_magic = CG_MAGIC;
acg.cg_cgx = cylno;
acg.cg_niblk = sblock.fs_ipg;
acg.cg_initediblk = sblock.fs_ipg < 2 * INOPB(&sblock) ?
sblock.fs_ipg : 2 * INOPB(&sblock);
acg.cg_ndblk = dmax - cbase;
if (sblock.fs_contigsumsize > 0)
acg.cg_nclusterblks = acg.cg_ndblk >> sblock.fs_fragshift;
start = &acg.cg_space[0] - (u_char *)(&acg.cg_firstfield);
if (Oflag == 2) {
acg.cg_time = tv->tv_sec;
acg.cg_niblk = sblock.fs_ipg;
acg.cg_initediblk = sblock.fs_ipg < 2 * INOPB(&sblock) ?
sblock.fs_ipg : 2 * INOPB(&sblock);
acg.cg_iusedoff = start;
} else {
acg.cg_old_ncyl = sblock.fs_old_cpg;
acg.cg_old_time = acg.cg_time;
acg.cg_time = 0;
acg.cg_old_niblk = acg.cg_niblk;
acg.cg_niblk = 0;
acg.cg_initediblk = 0;
acg.cg_old_time = tv->tv_sec;
acg.cg_old_niblk = sblock.fs_ipg;
acg.cg_old_btotoff = start;
acg.cg_old_boff = acg.cg_old_btotoff +
sblock.fs_old_cpg * sizeof(int32_t);
@ -802,7 +799,7 @@ initcg(int cylno, const struct timeval *tv)
start += sblock.fs_bsize;
dp1 = (struct ufs1_dinode *)(&iobuf[start]);
dp2 = (struct ufs2_dinode *)(&iobuf[start]);
for (i = 0; i < acg.cg_initediblk; i++) {
for (i = MIN(sblock.fs_ipg, 2) * INOPB(&sblock); i != 0; i--) {
if (sblock.fs_magic == FS_UFS1_MAGIC) {
/* No need to swap, it'll stay random */
dp1->di_gen = random();
@ -834,7 +831,6 @@ initcg(int cylno, const struct timeval *tv)
/*
* initialize the file system
*/
union dinode node;
#ifdef LOSTDIR
#define PREDEFDIR 3
@ -879,6 +875,7 @@ static void copy_dir(struct direct *, struct direct *);
int
fsinit(const struct timeval *tv, mode_t mfsmode, uid_t mfsuid, gid_t mfsgid)
{
union dinode node;
#ifdef LOSTDIR
int i;
int dirblksiz = DIRBLKSIZ;
@ -889,12 +886,12 @@ fsinit(const struct timeval *tv, mode_t mfsmode, uid_t mfsuid, gid_t mfsgid)
/*
* initialize the node
*/
memset(&node, 0, sizeof(node));
#ifdef LOSTDIR
/*
* create the lost+found directory
*/
memset(&node, 0, sizeof(node));
if (Oflag == 0) {
(void)makedir((struct direct *)olost_found_dir, 2);
for (i = dirblksiz; i < sblock.fs_bsize; i += dirblksiz)
@ -951,6 +948,7 @@ fsinit(const struct timeval *tv, mode_t mfsmode, uid_t mfsuid, gid_t mfsgid)
/*
* create the root directory
*/
memset(&node, 0, sizeof(node));
if (Oflag <= 1) {
if (mfs) {
node.dp1.di_mode = IFDIR | mfsmode;
@ -1122,25 +1120,25 @@ iput(union dinode *ip, ino_t ino)
rdfs(d, sblock.fs_bsize, (char *)iobuf);
if (sblock.fs_magic == FS_UFS1_MAGIC) {
dp1 = (struct ufs1_dinode *)iobuf;
dp1 += ino_to_fsbo(&sblock, ino);
if (needswap) {
ffs_dinode1_swap(&ip->dp1,
&dp1[ino_to_fsbo(&sblock, ino)]);
ffs_dinode1_swap(&ip->dp1, dp1);
/* ffs_dinode1_swap() doesn't swap blocks addrs */
for (i=0; i<NDADDR + NIADDR; i++)
(&dp1[ino_to_fsbo(&sblock, ino)])->di_db[i] =
bswap32(ip->dp1.di_db[i]);
dp1->di_db[i] = bswap32(ip->dp1.di_db[i]);
} else
dp1[ino_to_fsbo(&sblock, ino)] = ip->dp1;
*dp1 = ip->dp1;
dp1->di_gen = random();
} else {
dp2 = (struct ufs2_dinode *)iobuf;
dp2 += ino_to_fsbo(&sblock, ino);
if (needswap) {
ffs_dinode2_swap(&ip->dp2,
&dp2[ino_to_fsbo(&sblock, ino)]);
ffs_dinode2_swap(&ip->dp2, dp2);
for (i=0; i<NDADDR + NIADDR; i++)
(&dp2[ino_to_fsbo(&sblock, ino)])->di_db[i] =
bswap32(ip->dp2.di_db[i]);
dp2->di_db[i] = bswap32(ip->dp2.di_db[i]);
} else
dp2[ino_to_fsbo(&sblock, ino)] = ip->dp2;
*dp2 = ip->dp2;
dp2->di_gen = random();
}
wtfs(d, sblock.fs_bsize, iobuf);
}