From: Adam Kwolek <adam.kwolek@intel.com>
Date: Wed, 8 Jun 2011 07:11:11 +0000 (+1000)
Subject: Add reshape restart support for external metadata
X-Git-Tag: mdadm-3.2.2~54
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=ba53ea59adab4d08bb8ac1e15b39a9389ba26950;p=thirdparty%2Fmdadm.git

Add reshape restart support for external metadata

Patch introduces support for reshape process restart for external metadata
using metadata specific data handling methods.
It introduces recover_backup() function that restores array to stable state
It is equivalent to Grow_restart() functionality for native metadata.

Signed-off-by: Maciej Trela <maciej.trela@intel.com>
Signed-off-by: Adam Kwolek <adam.kwolek@intel.com>
Signed-off-by: Krzysztof Wojcik <krzysztof.wojcik@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
---

diff --git a/Assemble.c b/Assemble.c
index 250a6e0e..a426afb0 100644
--- a/Assemble.c
+++ b/Assemble.c
@@ -1190,8 +1190,11 @@ int Assemble(struct supertype *st, char *mddev,
 				fdlist[i] = -1;
 		}
 		if (!err) {
-			err = Grow_restart(st, content, fdlist, bestcnt,
-					   backup_file, verbose > 0);
+			if (st->ss->external && st->ss->recover_backup)
+				err = st->ss->recover_backup(st, content);
+			else
+				err = Grow_restart(st, content, fdlist, bestcnt,
+						   backup_file, verbose > 0);
 			if (err && invalid_backup) {
 				if (verbose > 0)
 					fprintf(stderr, Name ": continuing"
@@ -1571,8 +1574,11 @@ int assemble_container_content(struct supertype *st, int mdfd,
 				else
 					fdlist[spare++] = fd;
 			}
-			err = Grow_restart(st, content, fdlist, spare,
-					   backup_file, verbose > 0);
+			if (st->ss->external && st->ss->recover_backup)
+				err = st->ss->recover_backup(st, content);
+			else
+				err = Grow_restart(st, content, fdlist, spare,
+						   backup_file, verbose > 0);
 			while (spare > 0) {
 				spare--;
 				if (fdlist[spare] >= 0)
diff --git a/mdadm.h b/mdadm.h
index a6933521..e075dd2a 100644
--- a/mdadm.h
+++ b/mdadm.h
@@ -786,6 +786,9 @@ extern struct superswitch {
 	 */
 	const char *(*get_disk_controller_domain)(const char *path);
 
+	/* for external backup area */
+	int (*recover_backup)(struct supertype *st, struct mdinfo *info);
+
 	int swapuuid; /* true if uuid is bigending rather than hostendian */
 	int external;
 	const char *name; /* canonical metadata name */