Attachment 312441 Details for Bug 250104 – Patch 1 for blktap statistics v2

[patch] Patch 1 for blktap statistics v2

linux-2.6.18-xen-blktap-stats-13325-1-v2.patch (text/plain), 3.16 KB, created by Chris Lalancette on 2008-07-23 09:54:48 UTC

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Creator: Chris Lalancette

Created: 2008-07-23 09:54:48 UTC

Size: 3.16 KB

patch

obsolete

>diff -urp linux-2.6.18.noarch.orig/drivers/xen/blkback/xenbus.c linux-2.6.18.noarch.patch1/drivers/xen/blkback/xenbus.c
>--- linux-2.6.18.noarch.orig/drivers/xen/blkback/xenbus.c	2008-07-17 06:56:53.000000000 -0400
>+++ linux-2.6.18.noarch.patch1/drivers/xen/blkback/xenbus.c	2008-07-17 06:58:51.000000000 -0400
>@@ -43,9 +43,30 @@ static int connect_ring(struct backend_i
> static void backend_changed(struct xenbus_watch *, const char **,
> 			    unsigned int);
> 
>+static int blkback_name(blkif_t *blkif, char *buf)
>+{
>+	char *devpath, *devname;
>+	struct xenbus_device *dev = blkif->be->dev;
>+
>+	devpath = xenbus_read(XBT_NIL, dev->nodename, "dev", NULL);
>+	if (IS_ERR(devpath)) 
>+		return PTR_ERR(devpath);
>+	
>+	if ((devname = strstr(devpath, "/dev/")) != NULL)
>+		devname += strlen("/dev/");
>+	else
>+		devname  = devpath;
>+
>+	snprintf(buf, TASK_COMM_LEN, "blkback.%d.%s", blkif->domid, devname);
>+	kfree(devpath);
>+	
>+	return 0;
>+}
>+
> static void update_blkif_status(blkif_t *blkif)
> { 
> 	int err;
>+	char name[TASK_COMM_LEN];
> 
> 	/* Not ready to connect? */
> 	if (!blkif->irq || !blkif->vbd.bdev)
>@@ -60,10 +81,13 @@ static void update_blkif_status(blkif_t 
> 	if (blkif->be->dev->state != XenbusStateConnected)
> 		return;
> 
>-	blkif->xenblkd = kthread_run(blkif_schedule, blkif,
>-				     "xvd %d %02x:%02x",
>-				     blkif->domid,
>-				     blkif->be->major, blkif->be->minor);
>+	err = blkback_name(blkif, name);
>+	if (err) {
>+		xenbus_dev_error(blkif->be->dev, err, "get blkback dev name");
>+		return;
>+	}
>+
>+	blkif->xenblkd = kthread_run(blkif_schedule, blkif, name);
> 	if (IS_ERR(blkif->xenblkd)) {
> 		err = PTR_ERR(blkif->xenblkd);
> 		blkif->xenblkd = NULL;
>diff -urp linux-2.6.18.noarch.orig/drivers/xen/blktap/xenbus.c linux-2.6.18.noarch.patch1/drivers/xen/blktap/xenbus.c
>--- linux-2.6.18.noarch.orig/drivers/xen/blktap/xenbus.c	2008-07-17 06:56:53.000000000 -0400
>+++ linux-2.6.18.noarch.patch1/drivers/xen/blktap/xenbus.c	2008-07-17 06:58:51.000000000 -0400
>@@ -92,9 +92,30 @@ static long get_id(const char *str)
>         return simple_strtol(num, NULL, 10);
> }				
> 
>+static int blktap_name(blkif_t *blkif, char *buf)
>+{
>+	char *devpath, *devname;
>+	struct xenbus_device *dev = blkif->be->dev;
>+
>+	devpath = xenbus_read(XBT_NIL, dev->nodename, "dev", NULL);
>+	if (IS_ERR(devpath)) 
>+		return PTR_ERR(devpath);
>+	
>+	if ((devname = strstr(devpath, "/dev/")) != NULL)
>+		devname += strlen("/dev/");
>+	else
>+		devname  = devpath;
>+
>+	snprintf(buf, TASK_COMM_LEN, "blktap.%d.%s", blkif->domid, devname);
>+	kfree(devpath);
>+	
>+	return 0;
>+}
>+
> static void tap_update_blkif_status(blkif_t *blkif)
> { 
> 	int err;
>+	char name[TASK_COMM_LEN];
> 
> 	/* Not ready to connect? */
> 	if(!blkif->irq || !blkif->sectors) {
>@@ -110,10 +131,13 @@ static void tap_update_blkif_status(blki
> 	if (blkif->be->dev->state != XenbusStateConnected)
> 		return;
> 
>-	blkif->xenblkd = kthread_run(tap_blkif_schedule, blkif,
>-				     "xvd %d",
>-				     blkif->domid);
>+	err = blktap_name(blkif, name);
>+	if (err) {
>+		xenbus_dev_error(blkif->be->dev, err, "get blktap dev name");
>+		return;
>+	}
> 
>+	blkif->xenblkd = kthread_run(tap_blkif_schedule, blkif, name);
> 	if (IS_ERR(blkif->xenblkd)) {
> 		err = PTR_ERR(blkif->xenblkd);
> 		blkif->xenblkd = NULL;

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Attachments on bug 250104: 293926 | 293927 | 293928 | 293929 | 293930 | 293931 | 293932 | 293933 | 293934 | 312441 | 312442 | 312443 | 312444 | 312445 | 312446 | 312447