diff options
Diffstat (limited to 'sbin/newfs/mkfs.c')
| -rw-r--r-- | sbin/newfs/mkfs.c | 43 |
1 files changed, 38 insertions, 5 deletions
diff --git a/sbin/newfs/mkfs.c b/sbin/newfs/mkfs.c index ab4713d..63ad1bf 100644 --- a/sbin/newfs/mkfs.c +++ b/sbin/newfs/mkfs.c @@ -86,8 +86,6 @@ extern int realsectorsize; /* bytes/sector in hardware*/ extern int rpm; /* revolutions/minute of drive */ extern int interleave; /* hardware sector interleave */ extern int trackskew; /* sector 0 skew, per track */ -extern int headswitch; /* head switch time, usec */ -extern int trackseek; /* track-to-track seek, usec */ extern int fsize; /* fragment size */ extern int bsize; /* block size */ extern int cpg; /* cylinders/cylinder group */ @@ -121,6 +119,10 @@ union { struct dinode zino[MAXBSIZE / sizeof(struct dinode)]; +#ifdef FSIRAND +long fsi_random __P((void)); +#endif + int fsi, fso; daddr_t alloc(); static int charsperline(); @@ -591,8 +593,6 @@ next: sblock.fs_rotdelay = rotdelay; sblock.fs_minfree = minfree; sblock.fs_maxcontig = maxcontig; - sblock.fs_headswitch = headswitch; - sblock.fs_trkseek = trackseek; sblock.fs_maxbpg = maxbpg; sblock.fs_rps = rpm / 60; sblock.fs_optim = opt; @@ -604,6 +604,11 @@ next: sblock.fs_fmod = 0; sblock.fs_ronly = 0; sblock.fs_clean = 1; +#ifdef FSIRAND + sblock.fs_id[0] = (long)utime; + sblock.fs_id[1] = fsi_random(); +#endif + /* * Dump out summary information about file system. */ @@ -751,9 +756,14 @@ initcg(cylno, utime) setbit(cg_inosused(&acg), i); acg.cg_cs.cs_nifree--; } - for (i = 0; i < sblock.fs_ipg / INOPF(&sblock); i += sblock.fs_frag) + for (i = 0; i < sblock.fs_ipg / INOPF(&sblock); i += sblock.fs_frag) { +#ifdef FSIRAND + for (j = 0; j < sblock.fs_bsize / sizeof(struct dinode); j++) + zino[j].di_gen = fsi_random(); +#endif wtfs(fsbtodb(&sblock, cgimin(&sblock, cylno) + i), sblock.fs_bsize, (char *)zino); + } if (cylno > 0) { /* * In cylno 0, beginning space is reserved @@ -1057,6 +1067,9 @@ iput(ip, ino) daddr_t d; int c; +#ifdef FSIRAND + ip->di_gen = fsi_random(); +#endif c = ino_to_cg(&sblock, ino); rdfs(fsbtodb(&sblock, cgtod(&sblock, 0)), sblock.fs_cgsize, (char *)&acg); @@ -1336,3 +1349,23 @@ charsperline() columns = 80; /* last resort */ return columns; } + +#ifdef FSIRAND +long +fsi_random(void) { + static int fd = -1; + long ret; + + if (fd == -1) { + if ((fd = open("/dev/urandom", O_RDONLY)) == -1) { + perror("open /dev/urandom"); + exit(1); + } + } + if (read(fd, &ret, sizeof(ret)) != sizeof(ret)) { + perror("read /dev/urandom"); + exit(1); + } + return(ret); +} +#endif |
