From ebe789d61c70e3c9dc31441e9d59f051b40ba30b Mon Sep 17 00:00:00 2001
From: Poul-Henning Kamp <phk@FreeBSD.org>
Date: Mon, 3 Mar 2003 13:05:00 +0000
Subject: [PATCH] Add a "-S sectorsize" option to enable Kirk to find a bug :-)

---
 sbin/mdconfig/mdconfig.8 | 3 +++
 sbin/mdconfig/mdconfig.c | 9 +++++++--
 sys/dev/md/md.c          | 8 +++++++-
 sys/sys/mdioctl.h        | 3 ++-
 4 files changed, 19 insertions(+), 4 deletions(-)

diff --git a/sbin/mdconfig/mdconfig.8 b/sbin/mdconfig/mdconfig.8
index 3b3583e986be..2ed1bdd6ad21 100644
--- a/sbin/mdconfig/mdconfig.8
+++ b/sbin/mdconfig/mdconfig.8
@@ -57,6 +57,7 @@
 .Oc
 .Op Fl s Ar size
 .Op Fl f Ar file
+.Op Fl S Ar sectorsize
 .Op Fl u Ar unit
 .Nm
 .Fl d
@@ -111,6 +112,8 @@ or
 .Cm g
 which
 denotes kilobyte, megabyte and gigabyte respectively.
+.It Fl S Ar sectorsize
+Sectorsize to use for malloc backed device.
 .It Fl o Oo Cm no Oc Ns Ar option
 Set or reset options.
 .Bl -tag -width indent
diff --git a/sbin/mdconfig/mdconfig.c b/sbin/mdconfig/mdconfig.c
index f92e6a989c16..8ead3ad61391 100644
--- a/sbin/mdconfig/mdconfig.c
+++ b/sbin/mdconfig/mdconfig.c
@@ -37,7 +37,7 @@ void
 usage()
 {
 	fprintf(stderr, "usage:\n");
-	fprintf(stderr, "\tmdconfig -a -t type [-o [no]option]... [ -f file] [-s size] [-u unit]\n");
+	fprintf(stderr, "\tmdconfig -a -t type [-o [no]option]... [ -f file] [-s size] [-S sectorsize] [-u unit]\n");
 	fprintf(stderr, "\tmdconfig -d -u unit\n");
 	fprintf(stderr, "\tmdconfig -l [-u unit]\n");
 	fprintf(stderr, "\t\ttype = {malloc, preload, vnode, swap}\n");
@@ -54,7 +54,7 @@ main(int argc, char **argv)
 	int cmdline = 0;
 
 	for (;;) {
-		ch = getopt(argc, argv, "ab:df:lo:s:t:u:");
+		ch = getopt(argc, argv, "ab:df:lo:s:S:t:u:");
 		if (ch == -1)
 			break;
 		switch (ch) {
@@ -130,6 +130,11 @@ main(int argc, char **argv)
 			else
 				errx(1, "Unknown option.");
 			break;
+		case 'S':
+			if (cmdline != 2)
+				usage();
+			mdio.md_secsize = strtoul(optarg, &p, 0);
+			break;
 		case 's':
 			if (cmdline != 2)
 				usage();
diff --git a/sys/dev/md/md.c b/sys/dev/md/md.c
index c03d10eeb6a5..7b754cba3313 100644
--- a/sys/dev/md/md.c
+++ b/sys/dev/md/md.c
@@ -746,6 +746,8 @@ mdcreate_malloc(struct md_ioctl *mdio)
 		return (EINVAL);
 	if (mdio->md_options & ~(MD_AUTOUNIT | MD_COMPRESS | MD_RESERVE))
 		return (EINVAL);
+	if (mdio->md_secsize != 0 && !powerof2(mdio->md_secsize))
+		return (EINVAL);
 	/* Compression doesn't make sense if we have reserved space */
 	if (mdio->md_options & MD_RESERVE)
 		mdio->md_options &= ~MD_COMPRESS;
@@ -760,8 +762,12 @@ mdcreate_malloc(struct md_ioctl *mdio)
 			return (EBUSY);
 	}
 	sc->type = MD_MALLOC;
-	sc->secsize = DEV_BSIZE;
+	if (mdio->md_secsize != 0)
+		sc->secsize = mdio->md_secsize;
+	else
+		sc->secsize = DEV_BSIZE;
 	sc->nsect = mdio->md_size;
+	sc->nsect /= (sc->secsize / DEV_BSIZE);
 	sc->flags = mdio->md_options & (MD_COMPRESS | MD_FORCE);
 	sc->indir = dimension(sc->nsect);
 	sc->uma = uma_zcreate(sc->name, sc->secsize,
diff --git a/sys/sys/mdioctl.h b/sys/sys/mdioctl.h
index 15a70e138def..89b95221f89c 100644
--- a/sys/sys/mdioctl.h
+++ b/sys/sys/mdioctl.h
@@ -53,7 +53,7 @@ enum md_types {MD_MALLOC, MD_PRELOAD, MD_VNODE, MD_SWAP};
  * Ioctl definitions for memory disk pseudo-device.
  */
 
-#define MDNPAD		100
+#define MDNPAD		99
 struct md_ioctl {
 	unsigned	md_version;	/* Structure layout version */
 	unsigned	md_unit;	/* unit number */
@@ -62,6 +62,7 @@ struct md_ioctl {
 	unsigned	md_size;	/* size of disk in DEV_BSIZE units */
 	unsigned	md_options;	/* options */
 	u_int64_t	md_base;	/* base address */
+	int		md_secsize;	/* sectorsize */
 	int		md_pad[MDNPAD];	/* padding for future ideas */
 };