mdadm/0055-imsm-don-t-allow-disks-with-different-sector-size-in.patch

From f2cc4f7d829e1b849e78bdf6c38b7bd6e234c600 Mon Sep 17 00:00:00 2001
From: Alexey Obitotskiy <aleksey.obitotskiy@intel.com>
Date: Tue, 9 May 2017 12:25:45 +0200
Subject: [PATCH] imsm: don't allow disks with different sector size in one
 array
Git-commit: f2cc4f7d829e1b849e78bdf6c38b7bd6e234c600
Patch-mainline: mdadm-4.0+
References: bsc#1069165, bsc#1069167, bsc#1068030

As there is no support in IMSM for arrays including disks with different
sector sizes, don't allow to create such configuration. Also skip the
disk with unsuitable sector size when looking for spares in the same
container.

Signed-off-by: Alexey Obitotskiy <aleksey.obitotskiy@intel.com>
Signed-off-by: Tomasz Majchrzak <tomasz.majchrzak@intel.com>
Signed-off-by: Jes Sorensen <jsorensen@fb.com>
Signed-off-by: Coly Li <colyli@suse.de>

---
 super-intel.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

Index: mdadm/super-intel.c
===================================================================
--- mdadm.orig/super-intel.c
+++ mdadm/super-intel.c
@@ -5487,6 +5487,22 @@ static int init_super_imsm(struct supert
 	return 1;
 }
 
+static int drive_validate_sector_size(struct intel_super *super, struct dl *dl)
+{
+	unsigned int member_sector_size;
+
+	if (dl->fd < 0) {
+		pr_err("Invalid file descriptor for %s\n", dl->devname);
+		return 0;
+	}
+
+	if (!get_dev_sector_size(dl->fd, dl->devname, &member_sector_size))
+		return 0;
+	if (member_sector_size != super->sector_size)
+		return 0;
+	return 1;
+}
+
 #ifndef MDASSEMBLE
 static int add_to_super_imsm_volume(struct supertype *st, mdu_disk_info_t *dk,
 				     int fd, char *devname)
@@ -5527,6 +5543,11 @@ static int add_to_super_imsm_volume(stru
 		return 1;
 	}
 
+	if (!drive_validate_sector_size(super, dl)) {
+		pr_err("Combining drives of different sector size in one volume is not allowed\n");
+		return 1;
+	}
+
 	/* add a pristine spare to the metadata */
 	if (dl->index < 0) {
 		dl->index = super->anchor->num_disks;
@@ -8490,6 +8511,9 @@ static struct dl *imsm_add_spare(struct
 		if (dl->index == -1 && !activate_new)
 			continue;
 
+		if (!drive_validate_sector_size(super, dl))
+			continue;
+
 		/* Does this unused device have the requisite free space?
 		 * It needs to be able to cover all member volumes
 		 */