From d965d63f6414b27c04acee860cc5357887b2e788 Mon Sep 17 00:00:00 2001
From: Karel Zak <kzak@redhat.com>
Date: Thu, 15 Oct 2009 01:22:42 +0200
Subject: [PATCH] blockdev: add topology ioctls support

new options:

   --getpbsz                      get physical block (sector) size
   --getiomin                     get minimum I/O size
   --getioopt                     get optimal I/O size
   --getalignoff                  get alignment offset
   --getmaxsect                   get max sectors per request

Signed-off-by: Karel Zak <kzak@redhat.com>
---
 disk-utils/blockdev.c | 32 +++++++++++++++++++++++++++++++-
 include/blkdev.h      |  6 ++++++
 2 files changed, 37 insertions(+), 1 deletion(-)

diff --git a/disk-utils/blockdev.c b/disk-utils/blockdev.c
index b6c6415f..b0ae37d9 100644
--- a/disk-utils/blockdev.c
+++ b/disk-utils/blockdev.c
@@ -78,7 +78,37 @@ struct bdc bdcms[] =
 		.name = "--getss",
 		.argtype = ARG_INT,
 		.argval = -1,
-		.help = N_("get sectorsize")
+		.help = N_("get logical block (sector) size")
+	},{
+		IOCTL_ENTRY(BLKPBSZGET),
+		.name = "--getpbsz",
+		.argtype = ARG_UINT,
+		.argval = -1,
+		.help = N_("get physical block (sector) size")
+	},{
+		IOCTL_ENTRY(BLKIOMIN),
+		.name = "--getiomin",
+		.argtype = ARG_UINT,
+		.argval = -1,
+		.help = N_("get minimum I/O size")
+	},{
+		IOCTL_ENTRY(BLKIOOPT),
+		.name = "--getioopt",
+		.argtype = ARG_UINT,
+		.argval = -1,
+		.help = N_("get optimal I/O size")
+	},{
+		IOCTL_ENTRY(BLKALIGNOFF),
+		.name = "--getalignoff",
+		.argtype = ARG_INT,
+		.argtype = -1,
+		.help = N_("get alignment offset")
+	},{
+		IOCTL_ENTRY(BLKSECTGET),
+		.name = "--getmaxsect",
+		.argtype = ARG_USHRT,
+		.argval = -1,
+		.help = N_("get max sectors per request")
 	},{
 		IOCTL_ENTRY(BLKBSZGET),
 		.name = "--getbsz",
diff --git a/include/blkdev.h b/include/blkdev.h
index 9d9453bc..57ef40d4 100644
--- a/include/blkdev.h
+++ b/include/blkdev.h
@@ -34,6 +34,12 @@
 #define BLKBSZSET  _IOW(0x12,113,size_t)
 #define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 *arg) */
 
+/* block device topology ioctls, introduced in 2.6.32 */
+#define BLKIOMIN   _IO(0x1,120)
+#define BLKIOOPT   _IO(0x12,121)
+#define BLKALIGNOFF _IO(0x12,122)
+#define BLKPBSZGET _IO(0x12,123)
+
 #endif /* BLKROSET */
 
 #ifndef HDIO_GETGEO
-- 
2.39.5