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Subject[PATCH] xen-blkback: enlarge the array size of blkback name
Date
The blkback name is like blkback.domid.xvd[a-z], if domid has three digits
(means larger than 100), then the backmost xvd wouldn't be fully shown.

Define a BLKBACK_NAME_LEN macro which is (TASK_COMM_LEN * 2), enlarge the
array size of blkback name, so it will be fully shown in any case.

Signed-off-by: Tao Chen <boby.chen@huawei.com>
---
drivers/block/xen-blkback/xenbus.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/block/xen-blkback/xenbus.c b/drivers/block/xen-blkback/xenbus.c
index e3afe97..0289e21 100644
--- a/drivers/block/xen-blkback/xenbus.c
+++ b/drivers/block/xen-blkback/xenbus.c
@@ -21,6 +21,9 @@
#include <xen/grant_table.h>
#include "common.h"

+/* Enlarge the array size in order to fully show blkback name. */
+#define BLKBACK_NAME_LEN (TASK_COMM_LEN * 2)
+
struct backend_info {
struct xenbus_device *dev;
struct xen_blkif *blkif;
@@ -70,7 +73,7 @@ static int blkback_name(struct xen_blkif *blkif, char *buf)
else
devname = devpath;

- snprintf(buf, TASK_COMM_LEN, "blkback.%d.%s", blkif->domid, devname);
+ snprintf(buf, BLKBACK_NAME_LEN, "blkback.%d.%s", blkif->domid, devname);
kfree(devpath);

return 0;
@@ -79,7 +82,7 @@ static int blkback_name(struct xen_blkif *blkif, char *buf)
static void xen_update_blkif_status(struct xen_blkif *blkif)
{
int err;
- char name[TASK_COMM_LEN];
+ char name[BLKBACK_NAME_LEN];

/* Not ready to connect? */
if (!blkif->irq || !blkif->vbd.bdev)
--
1.8.5


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