From cf52eff58ab9d08e3d016c4f22da8adfc295d7e0 Mon Sep 17 00:00:00 2001
From: Tomasz Majchrzak <tomasz.majchrzak@intel.com>
Date: Thu, 27 Oct 2016 11:34:16 +0200
Subject: [PATCH] Increase buffer for sysfs disk state

Bad block support has incremented sysfs disk state reported by kernel
("external_bbl") so it became longer than 20 bytes. It causes reshape to
fail as it reads truncated entry from sysfs.

Increase buffer so it can accommodate the string including all state
values currently implemented in kernel at the same time.

Signed-off-by: Tomasz Majchrzak <tomasz.majchrzak@intel.com>
Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
---
 Grow.c        | 6 ++++--
 monitor.c     | 4 ++--
 super-intel.c | 5 +++--
 3 files changed, 9 insertions(+), 6 deletions(-)

diff --git a/Grow.c b/Grow.c
index a8f62432..455c5f90 100755
--- a/Grow.c
+++ b/Grow.c
@@ -4048,8 +4048,10 @@ static int grow_backup(struct mdinfo *sra,
 			if (sd->disk.state & (1<<MD_DISK_FAULTY))
 				continue;
 			if (sd->disk.state & (1<<MD_DISK_SYNC)) {
-				char sbuf[20];
-				if (sysfs_get_str(sra, sd, "state", sbuf, 20) < 0 ||
+				char sbuf[100];
+
+				if (sysfs_get_str(sra, sd, "state",
+						  sbuf, sizeof(sbuf)) < 0 ||
 				    strstr(sbuf, "faulty") ||
 				    strstr(sbuf, "in_sync") == NULL) {
 					/* this device is dead */
diff --git a/monitor.c b/monitor.c
index 4c79ce23..3c554aba 100644
--- a/monitor.c
+++ b/monitor.c
@@ -131,8 +131,8 @@ static enum sync_action read_action( int fd)
 
 int read_dev_state(int fd)
 {
-	char buf[60];
-	int n = read_attr(buf, 60, fd);
+	char buf[100];
+	int n = read_attr(buf, sizeof(buf), fd);
 	char *cp;
 	int rv = 0;
 
diff --git a/super-intel.c b/super-intel.c
index 1f79eab8..57400880 100644
--- a/super-intel.c
+++ b/super-intel.c
@@ -10708,9 +10708,10 @@ int check_degradation_change(struct mdinfo *info,
 			if (sd->disk.state & (1<<MD_DISK_FAULTY))
 				continue;
 			if (sd->disk.state & (1<<MD_DISK_SYNC)) {
-				char sbuf[20];
+				char sbuf[100];
+
 				if (sysfs_get_str(info,
-					sd, "state", sbuf, 20) < 0 ||
+					sd, "state", sbuf, sizeof(sbuf)) < 0 ||
 					strstr(sbuf, "faulty") ||
 					strstr(sbuf, "in_sync") == NULL) {
 					/* this device is dead */
-- 
2.39.2