#include <sys/param.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <vfs/ufs/dinode.h>
#include <vfs/ufs/fs.h>
#include <vfs/ufs/ufsmount.h>
#include <err.h>
#include <fcntl.h>
#include <fstab.h>
#include <paths.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#define OPTWARN "should optimize for %s with minfree %s %d%%"
union {
struct fs sb;
char pad[MAXBSIZE];
} sbun;
#define sblock sbun.sb
int fi;
long dev_bsize = 1;
void bwrite(daddr_t, const char *, int);
int bread(daddr_t, char *, int);
void getsb(struct fs *, const char *);
void putsb(struct fs *, const char *, int);
void usage(void) __dead2;
void printfs(void);
int
main(int argc, char **argv)
{
char *cp, *special;
const char *name, *action;
struct stat st;
int i;
int Aflag = 0, active = 0;
struct fstab *fs;
const char *chg[2];
char device[MAXPATHLEN];
struct ufs_args args;
struct statfs stfs;
argc--, argv++;
if (argc < 2)
usage();
special = argv[argc - 1];
fs = getfsfile(special);
if (fs) {
if (statfs(special, &stfs) == 0 &&
strcmp(special, stfs.f_mntonname) == 0) {
active = 1;
}
special = fs->fs_spec;
}
again:
if (stat(special, &st) < 0) {
if (*special != '/') {
if (*special == 'r')
special++;
snprintf(device, sizeof(device), "%s%s",
_PATH_DEV, special);
special = device;
goto again;
}
err(1, "%s", special);
}
if (fs == NULL && (st.st_mode & S_IFMT) == S_IFDIR)
errx(10, "%s: unknown file system", special);
getsb(&sblock, special);
for (; argc > 0 && argv[0][0] == '-'; argc--, argv++) {
for (cp = &argv[0][1]; *cp; cp++)
switch (*cp) {
case 'A':
Aflag++;
continue;
case 'p':
printfs();
exit(0);
case 'a':
name = "maximum contiguous block count";
if (argc < 1)
errx(10, "-a: missing %s", name);
argc--, argv++;
i = atoi(*argv);
if (i < 1)
errx(10, "%s must be >= 1 (was %s)",
name, *argv);
warnx("%s changes from %d to %d",
name, sblock.fs_maxcontig, i);
sblock.fs_maxcontig = i;
continue;
case 'd':
name =
"rotational delay between contiguous blocks";
if (argc < 1)
errx(10, "-d: missing %s", name);
argc--, argv++;
i = atoi(*argv);
warnx("%s changes from %dms to %dms",
name, sblock.fs_rotdelay, i);
sblock.fs_rotdelay = i;
continue;
case 'e':
name =
"maximum blocks per file in a cylinder group";
if (argc < 1)
errx(10, "-e: missing %s", name);
argc--, argv++;
i = atoi(*argv);
if (i < 1)
errx(10, "%s must be >= 1 (was %s)",
name, *argv);
warnx("%s changes from %d to %d",
name, sblock.fs_maxbpg, i);
sblock.fs_maxbpg = i;
continue;
case 'f':
name = "average file size";
if (argc < 1)
errx(10, "-a: missing %s", name);
argc--, argv++;
i = atoi(*argv);
if (i < 1)
errx(10, "%s must be >= 1 (was %s)", name, *argv);
if (sblock.fs_avgfilesize == i) {
warnx("%s remains unchanged as %d",
name, i);
} else {
warnx("%s changes from %d to %d",
name, sblock.fs_avgfilesize, i);
sblock.fs_avgfilesize = i;
}
break;
case 'm':
name = "minimum percentage of free space";
if (argc < 1)
errx(10, "-m: missing %s", name);
argc--, argv++;
i = atoi(*argv);
if (i < 0 || i > 99)
errx(10, "bad %s (%s)", name, *argv);
warnx("%s changes from %d%% to %d%%",
name, sblock.fs_minfree, i);
sblock.fs_minfree = i;
if (i >= MINFREE &&
sblock.fs_optim == FS_OPTSPACE)
warnx(OPTWARN, "time", ">=", MINFREE);
if (i < MINFREE &&
sblock.fs_optim == FS_OPTTIME)
warnx(OPTWARN, "space", "<", MINFREE);
continue;
case 'n':
name = "soft updates";
if (argc < 1)
errx(10, "-n: missing %s", name);
argc--, argv++;
if (strcmp(*argv, "enable") == 0) {
sblock.fs_flags |= FS_DOSOFTDEP;
action = "set";
} else if (strcmp(*argv, "disable") == 0) {
sblock.fs_flags &= ~FS_DOSOFTDEP;
action = "cleared";
} else {
errx(10, "bad %s (options are %s)",
name, "`enable' or `disable'");
}
warnx("%s %s", name, action);
continue;
case 'o':
name = "optimization preference";
if (argc < 1)
errx(10, "-o: missing %s", name);
argc--, argv++;
chg[FS_OPTSPACE] = "space";
chg[FS_OPTTIME] = "time";
if (strcmp(*argv, chg[FS_OPTSPACE]) == 0)
i = FS_OPTSPACE;
else if (strcmp(*argv, chg[FS_OPTTIME]) == 0)
i = FS_OPTTIME;
else
errx(10, "bad %s (options are `space' or `time')",
name);
if (sblock.fs_optim == i) {
warnx("%s remains unchanged as %s",
name, chg[i]);
continue;
}
warnx("%s changes from %s to %s",
name, chg[sblock.fs_optim], chg[i]);
sblock.fs_optim = i;
if (sblock.fs_minfree >= MINFREE &&
i == FS_OPTSPACE)
warnx(OPTWARN, "time", ">=", MINFREE);
if (sblock.fs_minfree < MINFREE &&
i == FS_OPTTIME)
warnx(OPTWARN, "space", "<", MINFREE);
continue;
case 's':
name = "expected number of files per directory";
if (argc < 1)
errx(10, "-a: missing %s", name);
argc--, argv++;
i = atoi(*argv);
if (i < 1)
errx(10, "%s must be >= 1 (was %s)", name, *argv);
if (sblock.fs_avgfpdir == i) {
warnx("%s remains unchanged as %d",
name, i);
} else {
warnx("%s changes from %d to %d",
name, sblock.fs_avgfpdir, i);
sblock.fs_avgfpdir = i;
}
break;
default:
usage();
}
}
if (argc != 1)
usage();
putsb(&sblock, special, Aflag);
if (active) {
bzero(&args, sizeof(args));
if (mount("ufs", fs->fs_file,
stfs.f_flags | MNT_UPDATE | MNT_RELOAD, &args) < 0)
err(9, "%s: reload", special);
warnx("file system reloaded");
}
exit(0);
}
void
usage(void)
{
fprintf(stderr, "%s\n%s\n%s\n",
"usage: tunefs [-Ap] [-a maxcontig] [-d rotdelay] [-e maxbpg] [-f avgfilesize]",
" [-m minfree] [-n enable | disable] [-o space | time]",
" [-s filesperdir] {special | filesystem}");
exit(2);
}
void
getsb(struct fs *fs, const char *file)
{
fi = open(file, O_RDONLY);
if (fi < 0)
err(3, "cannot open %s", file);
if (bread((daddr_t)SBOFF, (char *)fs, SBSIZE))
err(4, "%s: bad super block", file);
if (fs->fs_magic != FS_MAGIC)
errx(5, "%s: bad magic number", file);
dev_bsize = fs->fs_fsize / fsbtodb(fs, 1);
}
void
putsb(struct fs *fs, const char *file, int all)
{
int i;
i = fi;
fi = open(file, O_RDWR);
close(i);
if (fi < 0)
err(3, "cannot open %s", file);
bwrite((daddr_t)SBOFF / dev_bsize, (const char *)fs, SBSIZE);
if (all)
for (i = 0; i < fs->fs_ncg; i++)
bwrite(fsbtodb(fs, cgsblock(fs, i)),
(const char *)fs, SBSIZE);
close(fi);
}
void
printfs(void)
{
warnx("soft updates: (-n) %s",
(sblock.fs_flags & FS_DOSOFTDEP)? "enabled" : "disabled");
warnx("maximum contiguous block count: (-a) %d",
sblock.fs_maxcontig);
warnx("rotational delay between contiguous blocks: (-d) %d ms",
sblock.fs_rotdelay);
warnx("maximum blocks per file in a cylinder group: (-e) %d",
sblock.fs_maxbpg);
warnx("average file size: (-f) %d",
sblock.fs_avgfilesize);
warnx("average number of files in a directory: (-s) %d",
sblock.fs_avgfpdir);
warnx("minimum percentage of free space: (-m) %d%%",
sblock.fs_minfree);
warnx("optimization preference: (-o) %s",
sblock.fs_optim == FS_OPTSPACE ? "space" : "time");
if (sblock.fs_minfree >= MINFREE &&
sblock.fs_optim == FS_OPTSPACE)
warnx(OPTWARN, "time", ">=", MINFREE);
if (sblock.fs_minfree < MINFREE &&
sblock.fs_optim == FS_OPTTIME)
warnx(OPTWARN, "space", "<", MINFREE);
}
void
bwrite(daddr_t blk, const char *buf, int size)
{
if (lseek(fi, (off_t)blk * dev_bsize, SEEK_SET) < 0)
err(6, "FS SEEK");
if (write(fi, buf, size) != size)
err(7, "FS WRITE");
}
int
bread(daddr_t bno, char *buf, int cnt)
{
int i;
if (lseek(fi, (off_t)bno * dev_bsize, SEEK_SET) < 0)
return(1);
if ((i = read(fi, buf, cnt)) != cnt) {
for(i=0; i<sblock.fs_bsize; i++)
buf[i] = 0;
return (1);
}
return (0);
}
