BSD 4.4 Lite sbin Sources

Note:  XNSrouted and routed NOT imported here, they shall be imported with
usr.sbin.

3 files changed, 428 insertions, 0 deletions

diff --git a/sbin/tunefs/Makefile b/sbin/tunefs/Makefile
new file mode 100644
index 0000000..92f94d7
--- /dev/null
+++ b/sbin/tunefs/Makefile
@@ -0,0 +1,6 @@
+#	@(#)Makefile	8.1 (Berkeley) 6/5/93
+
+PROG=	tunefs
+MAN8=	tunefs.0
+
+.include <bsd.prog.mk>
diff --git a/sbin/tunefs/tunefs.8 b/sbin/tunefs/tunefs.8
new file mode 100644
index 0000000..bfe4cb1
--- /dev/null
+++ b/sbin/tunefs/tunefs.8
@@ -0,0 +1,138 @@
+.\" Copyright (c) 1983, 1991, 1993
+.\"	The Regents of the University of California.  All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"     @(#)tunefs.8	8.2 (Berkeley) 12/11/93
+.\"
+.Dd December 11, 1993
+.Dt TUNEFS 8
+.Os BSD 4.2
+.Sh NAME
+.Nm tunefs
+.Nd tune up an existing file system
+.Sh SYNOPSIS
+.Nm tunefs
+.Op Fl a Ar maxcontig
+.Op Fl d Ar rotdelay
+.Op Fl e Ar maxbpg
+.Op Fl m Ar minfree
+.Bk -words
+.Op Fl o Ar optimize_preference
+.Ek
+.Op Ar special | Ar filesys
+.Sh DESCRIPTION
+.Nm Tunefs
+is designed to change the dynamic parameters of a file system
+which affect the layout policies.
+The parameters which are to be changed are indicated by the flags
+given below:
+.Bl -tag -width Ds
+.It Fl a Ar maxcontig
+This specifies the maximum number of contiguous blocks that will
+be laid out before forcing a rotational delay (see
+.Fl d
+below).
+The default value is one, since most device drivers require
+an interrupt per disk transfer.
+Device drivers that can chain several buffers together in a single
+transfer should set this to the maximum chain length.
+.It Fl d Ar rotdelay
+This specifies the expected time (in milliseconds)
+to service a transfer completion
+interrupt and initiate a new transfer on the same disk.
+It is used to decide how much rotational spacing to place between
+successive blocks in a file.
+.It Fl e Ar maxbpg
+This indicates the maximum number of blocks any single file can
+allocate out of a cylinder group before it is forced to begin
+allocating blocks from another cylinder group.
+Typically this value is set to about one quarter of the total blocks
+in a cylinder group.
+The intent is to prevent any single file from using up all the
+blocks in a single cylinder group,
+thus degrading access times for all files subsequently allocated
+in that cylinder group.
+The effect of this limit is to cause big files to do long seeks
+more frequently than if they were allowed to allocate all the blocks
+in a cylinder group before seeking elsewhere.
+For file systems with exclusively large files,
+this parameter should be set higher.
+.It Fl m Ar minfree
+This value specifies the percentage of space held back
+from normal users; the minimum free space threshold.
+The default value used is 10%.
+This value can be set to zero, however up to a factor of three
+in throughput will be lost over the performance obtained at a 10%
+threshold.
+Note that if the value is raised above the current usage level,
+users will be unable to allocate files until enough files have
+been deleted to get under the higher threshold.
+.It Fl o Ar optimize_preference
+The file system can either try to minimize the time spent
+allocating blocks, or it can attempt to minimize the space
+fragmentation on the disk.
+If the value of minfree (see above) is less than 10%,
+then the file system should optimize for space to avoid
+running out of full sized blocks.
+For values of minfree greater than or equal to 10%,
+fragmentation is unlikely to be problematical, and
+the file system can be optimized for time.
+.El
+.Sh SEE ALSO
+.Xr fs 5 ,
+.Xr dumpfs 8 ,
+.Xr newfs 8 ,
+.Xr mkfs 8
+.Rs
+.%A M. McKusick
+.%A W. Joy
+.%A S. Leffler
+.%A R. Fabry
+.%T "A Fast File System for UNIX"
+.%J "ACM Transactions on Computer Systems 2"
+.%N 3
+.%P pp 181-197
+.%D August 1984
+.%O "(reprinted in the BSD System Manager's Manual, SMM:5)"
+.Re
+.Sh BUGS
+This program should work on mounted and active file systems.
+Because the super-block is not kept in the buffer cache,
+the changes will only take effect if the program
+is run on dismounted file systems.
+To change the root file system, the system must be rebooted
+after the file system is tuned.
+.Pp
+You can tune a file system, but you can't tune a fish.
+.Sh HISTORY
+The
+.Nm
+command appeared in
+.Bx 4.2 .
diff --git a/sbin/tunefs/tunefs.c b/sbin/tunefs/tunefs.c
new file mode 100644
index 0000000..583dbff
--- /dev/null
+++ b/sbin/tunefs/tunefs.c
@@ -0,0 +1,284 @@
+/*
+ * Copyright (c) 1983, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char copyright[] =
+"@(#) Copyright (c) 1983, 1993\n\
+	The Regents of the University of California.  All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+static char sccsid[] = "@(#)tunefs.c	8.2 (Berkeley) 4/19/94";
+#endif /* not lint */
+
+/*
+ * tunefs: change layout parameters to an existing file system.
+ */
+#include <sys/param.h>
+#include <sys/stat.h>
+
+#include <ufs/ffs/fs.h>
+
+#include <errno.h>
+#include <err.h>
+#include <fcntl.h>
+#include <fstab.h>
+#include <stdio.h>
+#include <paths.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+/* the optimization warning string template */
+#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, char *, int);
+int bread(daddr_t, char *, int);
+void getsb(struct fs *, char *);
+void usage __P((void));
+
+int
+main(argc, argv)
+	int argc;
+	char *argv[];
+{
+	char *cp, *special, *name;
+	struct stat st;
+	int i;
+	int Aflag = 0;
+	struct fstab *fs;
+	char *chg[2], device[MAXPATHLEN];
+
+	argc--, argv++; 
+	if (argc < 2)
+		usage();
+	special = argv[argc - 1];
+	fs = getfsfile(special);
+	if (fs)
+		special = fs->fs_spec;
+again:
+	if (stat(special, &st) < 0) {
+		if (*special != '/') {
+			if (*special == 'r')
+				special++;
+			(void)sprintf(device, "%s/%s", _PATH_DEV, special);
+			special = device;
+			goto again;
+		}
+		err(1, "%s", special);
+	}
+	if ((st.st_mode & S_IFMT) != S_IFBLK &&
+	    (st.st_mode & S_IFMT) != S_IFCHR)
+		errx(10, "%s: not a block or character device", 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 '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 '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 '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;
+
+			default:
+				usage();
+			}
+	}
+	if (argc != 1)
+		usage();
+	bwrite((daddr_t)SBOFF / dev_bsize, (char *)&sblock, SBSIZE);
+	if (Aflag)
+		for (i = 0; i < sblock.fs_ncg; i++)
+			bwrite(fsbtodb(&sblock, cgsblock(&sblock, i)),
+			    (char *)&sblock, SBSIZE);
+	close(fi);
+	exit(0);
+}
+
+void
+usage()
+{
+
+	fprintf(stderr, "Usage: tunefs tuneup-options special-device\n");
+	fprintf(stderr, "where tuneup-options are:\n");
+	fprintf(stderr, "\t-a maximum contiguous blocks\n");
+	fprintf(stderr, "\t-d rotational delay between contiguous blocks\n");
+	fprintf(stderr, "\t-e maximum blocks per file in a cylinder group\n");
+	fprintf(stderr, "\t-m minimum percentage of free space\n");
+	fprintf(stderr, "\t-o optimization preference (`space' or `time')\n");
+	exit(2);
+}
+
+void
+getsb(fs, file)
+	register struct fs *fs;
+	char *file;
+{
+
+	fi = open(file, 2);
+	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)
+		err(5, "%s: bad magic number", file);
+	dev_bsize = fs->fs_fsize / fsbtodb(fs, 1);
+}
+
+void
+bwrite(blk, buf, size)
+	daddr_t blk;
+	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(bno, buf, cnt)
+	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);
+}