Attachment 256841 Details for Bug 379911 – dmraid libdevmapper UUID creation patch

[patch] dmraid libdevmapper UUID creation patch

dmraid-1.0.0.rc14-UUID.patch (text/plain), 1.69 KB, created by Heinz Mauelshagen on 2007-11-13 13:23:29 UTC

(hide)

Description:

Filename:

MIME Type:

Creator: Heinz Mauelshagen

Created: 2007-11-13 13:23:29 UTC

Size: 1.69 KB

patch

obsolete

>--- 1.0.0.rc14/lib/activate/devmapper.c	2006-09-15 15:52:11.000000000 +0200
>+++ current/lib/activate/devmapper.c	2007-11-13 13:51:11.000000000 +0100
>@@ -21,6 +21,8 @@
> #include "internal.h"
> #include "devmapper.h"
> 
>+#include <linux/dm-ioctl.h>
>+
> /* Make up a dm path. */
> char *mkdm_path(struct lib_context *lc, const char *name)
> {
>@@ -147,24 +149,46 @@
> 	return handle_table(lc, NULL, table, get_target_list());
> }
> 
>+/* Build a UUID for a dmraid device 
>+ * Return 1 for sucess; 0 for failure*/
>+static int dmraid_uuid(char *uuid, struct lib_context *lc,
>+		       struct raid_set *rs, uint uuid_len) {
>+	/* Clear garbage data from uuid string */
>+	memset(uuid, 0, uuid_len);
>+	
>+	/* Insert volume name into string */
>+	return !!memcpy(uuid, rs->name, strlen(rs->name));
>+}
>+
> /* Create a task, set its name and run it. */
> static int run_task(struct lib_context *lc, struct raid_set *rs,
> 		    char *table, int type)
> {
>+	/* DM_UUID_LEN is defined in dm-ioctl.h as 129 characters;
>+	 * though not all 129 must be used (md uses just 16 from 
>+	 * a quick review of md.c. 
>+	 * We will be using: (len vol grp name)*/ 
>+	char uuid[DM_UUID_LEN];
> 	int ret;
> 	struct dm_task *dmt;
> 
> 	_init_dm();
>-	ret = (dmt = dm_task_create(type)) && dm_task_set_name(dmt, rs->name);
>+	ret = (dmt = dm_task_create(type)) &&
>+	      dm_task_set_name(dmt, rs->name);
> 	if (ret && table)
> 		ret = parse_table(lc, dmt, table);
> 
>-	if (ret)
>+	if (ret) {
>+		if (DM_DEVICE_CREATE == type &&
>+		    dmraid_uuid(uuid, lc, rs, DM_UUID_LEN))
>+				dm_task_set_uuid(dmt, uuid);
> 		ret = dm_task_run(dmt);
>+	}
> 
> 	_exit_dm(dmt);
> 	return ret;
> }
>+	
> /* Create a mapped device. */
> int dm_create(struct lib_context *lc, struct raid_set *rs, char *table)
> {

Actions: View | Diff

Attachments on bug 379911: 256841 | 261031