X-Git-Url: http://git.ipfire.org/?a=blobdiff_plain;ds=sidebyside;f=mdadm.c;h=51e16f3fccb223f1c64370a5c6190404e29fb4ff;hb=942e1cdb4a6a5be02672bc686169c679e775c2be;hp=d3cf0fad87bf94f1910854e397c47bcfba0799ae;hpb=9eaf410feda4ad112d3cee0c0b5b4edf05fc63bf;p=thirdparty%2Fmdadm.git

diff --git a/mdadm.c b/mdadm.c
index d3cf0fad..51e16f3f 100644
--- a/mdadm.c
+++ b/mdadm.c
@@ -38,6 +38,7 @@ static int misc_list(struct mddev_dev *devlist,
 		     struct mddev_ident *ident,
 		     char *dump_directory,
 		     struct supertype *ss, struct context *c);
+const char Name[] = "mdadm";
 
 int main(int argc, char *argv[])
 {
@@ -73,6 +74,7 @@ int main(int argc, char *argv[])
 		.require_homehost = 1,
 	};
 	struct shape s = {
+		.journaldisks	= 0,
 		.level		= UnSet,
 		.layout		= UnSet,
 		.bitmap_chunk	= UnSet,
@@ -187,6 +189,8 @@ int main(int argc, char *argv[])
 			break;
 		case 'a':
 		case Add:
+		case AddSpare:
+		case AddJournal:
 		case 'r':
 		case Remove:
 		case Replace:
@@ -194,6 +198,7 @@ int main(int argc, char *argv[])
 		case 'f':
 		case Fail:
 		case ReAdd: /* re-add */
+		case ClusterConfirm:
 			if (!mode) {
 				newmode = MANAGE;
 				shortopt = short_bitmap_options;
@@ -229,6 +234,7 @@ int main(int argc, char *argv[])
 		case ExamineBB:
 		case Dump:
 		case Restore:
+		case Action:
 			newmode = MISC;
 			break;
 
@@ -334,13 +340,11 @@ int main(int argc, char *argv[])
 			}
 
 			if (devs_found > 0 && mode == MANAGE && !devmode) {
-				pr_err("Must give one of -a/-r/-f"
-					" for subsequent devices at %s\n", optarg);
+				pr_err("Must give one of -a/-r/-f for subsequent devices at %s\n", optarg);
 				exit(2);
 			}
 			if (devs_found > 0 && mode == GROW && !devmode) {
-				pr_err("Must give -a/--add for"
-				       " devices to add: %s\n", optarg);
+				pr_err("Must give -a/--add for devices to add: %s\n", optarg);
 				exit(2);
 			}
 			dv = xmalloc(sizeof(*dv));
@@ -367,8 +371,7 @@ int main(int argc, char *argv[])
 		case O(BUILD,'c'): /* chunk or rounding */
 		case O(BUILD,ChunkSize): /* chunk or rounding */
 			if (s.chunk) {
-				pr_err("chunk/rounding may only be specified once. "
-					"Second value is %s.\n", optarg);
+				pr_err("chunk/rounding may only be specified once. Second value is %s.\n", optarg);
 				exit(2);
 			}
 			s.chunk = parse_size(optarg);
@@ -418,8 +421,7 @@ int main(int argc, char *argv[])
 		case O(CREATE,'z'):
 		case O(BUILD,'z'): /* size */
 			if (s.size > 0) {
-				pr_err("size may only be specified once. "
-					"Second value is %s.\n", optarg);
+				pr_err("size may only be specified once. Second value is %s.\n", optarg);
 				exit(2);
 			}
 			if (strcmp(optarg, "max")==0)
@@ -439,8 +441,7 @@ int main(int argc, char *argv[])
 
 		case O(GROW,'Z'): /* array size */
 			if (array_size > 0) {
-				pr_err("array-size may only be specified once. "
-					"Second value is %s.\n", optarg);
+				pr_err("array-size may only be specified once. Second value is %s.\n", optarg);
 				exit(2);
 			}
 			if (strcmp(optarg, "max") == 0)
@@ -459,8 +460,7 @@ int main(int argc, char *argv[])
 		case O(CREATE,DataOffset):
 		case O(GROW,DataOffset):
 			if (data_offset != INVALID_SECTORS) {
-				pr_err("data-offset may only be specified one. "
-					"Second value is %s.\n", optarg);
+				pr_err("data-offset may only be specified one. Second value is %s.\n", optarg);
 				exit(2);
 			}
 			if (mode == CREATE &&
@@ -479,8 +479,7 @@ int main(int argc, char *argv[])
 		case O(CREATE,'l'):
 		case O(BUILD,'l'): /* set raid level*/
 			if (s.level != UnSet) {
-				pr_err("raid level may only be set once.  "
-					"Second value is %s.\n", optarg);
+				pr_err("raid level may only be set once.  Second value is %s.\n", optarg);
 				exit(2);
 			}
 			s.level = map_name(pers, optarg);
@@ -508,8 +507,7 @@ int main(int argc, char *argv[])
 		case O(GROW, 'p'): /* new layout */
 		case O(GROW, Layout):
 			if (s.layout_str) {
-				pr_err("layout may only be sent once.  "
-				       "Second value was %s\n", optarg);
+				pr_err("layout may only be sent once.  Second value was %s\n", optarg);
 				exit(2);
 			}
 			s.layout_str = optarg;
@@ -521,8 +519,7 @@ int main(int argc, char *argv[])
 		case O(BUILD,'p'): /* faulty layout */
 		case O(BUILD,Layout):
 			if (s.layout != UnSet) {
-				pr_err("layout may only be sent once.  "
-				       "Second value was %s\n", optarg);
+				pr_err("layout may only be sent once.  Second value was %s\n", optarg);
 				exit(2);
 			}
 			switch(s.level) {
@@ -594,7 +591,23 @@ int main(int argc, char *argv[])
 			}
 			ident.raid_disks = s.raiddisks;
 			continue;
-
+		case O(ASSEMBLE, Nodes):
+		case O(CREATE, Nodes):
+			c.nodes = parse_num(optarg);
+			if (c.nodes <= 0) {
+				pr_err("invalid number for the number of cluster nodes: %s\n",
+					optarg);
+				exit(2);
+			}
+			continue;
+		case O(CREATE, ClusterName):
+		case O(ASSEMBLE, ClusterName):
+			c.homecluster = optarg;
+			if (strlen(c.homecluster) > 64) {
+				pr_err("Cluster name too big.\n");
+				exit(ERANGE);
+			}
+			continue;
 		case O(CREATE,'x'): /* number of spare (eXtra) disks */
 			if (s.sparedisks) {
 				pr_err("spare-devices set twice: %d and %s\n",
@@ -653,8 +666,7 @@ int main(int argc, char *argv[])
 		case O(CREATE,'u'): /* uuid of array */
 		case O(ASSEMBLE,'u'): /* uuid of array */
 			if (ident.uuid_set) {
-				pr_err("uuid cannot be set twice.  "
-					"Second value %s.\n", optarg);
+				pr_err("uuid cannot be set twice.  Second value %s.\n", optarg);
 				exit(2);
 			}
 			if (parse_uuid(optarg, ident.uuid))
@@ -669,8 +681,7 @@ int main(int argc, char *argv[])
 		case O(ASSEMBLE,'N'):
 		case O(MISC,'N'):
 			if (ident.name[0]) {
-				pr_err("name cannot be set twice.   "
-					"Second value %s.\n", optarg);
+				pr_err("name cannot be set twice.   Second value %s.\n", optarg);
 				exit(2);
 			}
 			if (mode == MISC && !c.subarray) {
@@ -688,8 +699,7 @@ int main(int argc, char *argv[])
 		case O(ASSEMBLE,'m'): /* super-minor for array */
 		case O(ASSEMBLE,SuperMinor):
 			if (ident.super_minor != UnSet) {
-				pr_err("super-minor cannot be set twice.  "
-					"Second value: %s.\n", optarg);
+				pr_err("super-minor cannot be set twice.  Second value: %s.\n", optarg);
 				exit(2);
 			}
 			if (strcmp(optarg, "dev")==0)
@@ -712,14 +722,12 @@ int main(int argc, char *argv[])
 		case O(ASSEMBLE,'U'): /* update the superblock */
 		case O(MISC,'U'):
 			if (c.update) {
-				pr_err("Can only update one aspect"
-					" of superblock, both %s and %s given.\n",
+				pr_err("Can only update one aspect of superblock, both %s and %s given.\n",
 					c.update, optarg);
 				exit(2);
 			}
 			if (mode == MISC && !c.subarray) {
-				pr_err("Only subarrays can be"
-					" updated in misc mode\n");
+				pr_err("Only subarrays can be updated in misc mode\n");
 				exit(2);
 			}
 			c.update = optarg;
@@ -737,6 +745,10 @@ int main(int argc, char *argv[])
 				continue;
 			if (strcmp(c.update, "homehost")==0)
 				continue;
+			if (strcmp(c.update, "home-cluster")==0)
+				continue;
+			if (strcmp(c.update, "nodes")==0)
+				continue;
 			if (strcmp(c.update, "devicesize")==0)
 				continue;
 			if (strcmp(c.update, "no-bitmap")==0)
@@ -745,22 +757,22 @@ int main(int argc, char *argv[])
 				continue;
 			if (strcmp(c.update, "no-bbl") == 0)
 				continue;
+			if (strcmp(c.update, "force-no-bbl") == 0)
+				continue;
 			if (strcmp(c.update, "metadata") == 0)
 				continue;
 			if (strcmp(c.update, "revert-reshape") == 0)
 				continue;
 			if (strcmp(c.update, "byteorder")==0) {
 				if (ss) {
-					pr_err("must not set metadata"
-					       " type with --update=byteorder.\n");
+					pr_err("must not set metadata type with --update=byteorder.\n");
 					exit(2);
 				}
 				for(i=0; !ss && superlist[i]; i++)
 					ss = superlist[i]->match_metadata_desc(
 						"0.swap");
 				if (!ss) {
-					pr_err("INTERNAL ERROR"
-						" cannot find 0.swap\n");
+					pr_err("INTERNAL ERROR cannot find 0.swap\n");
 					exit(2);
 				}
 
@@ -769,38 +781,38 @@ int main(int argc, char *argv[])
 			if (strcmp(c.update,"?") == 0 ||
 			    strcmp(c.update, "help") == 0) {
 				outf = stdout;
-				fprintf(outf, Name ": ");
+				fprintf(outf, "%s: ", Name);
 			} else {
 				outf = stderr;
 				fprintf(outf,
-					Name ": '--update=%s' is invalid.  ",
-					c.update);
+					"%s: '--update=%s' is invalid.  ",
+					Name, c.update);
 			}
 			fprintf(outf, "Valid --update options are:\n"
-		"     'sparc2.2', 'super-minor', 'uuid', 'name', 'resync',\n"
-		"     'summaries', 'homehost', 'byteorder', 'devicesize',\n"
-		"     'no-bitmap', 'metadata', 'revert-reshape'\n");
+		"     'sparc2.2', 'super-minor', 'uuid', 'name', 'nodes', 'resync',\n"
+		"     'summaries', 'homehost', 'home-cluster', 'byteorder', 'devicesize',\n"
+		"     'no-bitmap', 'metadata', 'revert-reshape'\n"
+		"     'bbl', 'no-bbl', 'force-no-bbl'\n"
+				);
 			exit(outf == stdout ? 0 : 2);
 
 		case O(MANAGE,'U'):
 			/* update=devicesize is allowed with --re-add */
 			if (devmode != 'A') {
-				pr_err("--update in Manage mode only"
-					" allowed with --re-add.\n");
+				pr_err("--update in Manage mode only allowed with --re-add.\n");
 				exit(1);
 			}
 			if (c.update) {
-				pr_err("Can only update one aspect"
-					" of superblock, both %s and %s given.\n",
+				pr_err("Can only update one aspect of superblock, both %s and %s given.\n",
 					c.update, optarg);
 				exit(2);
 			}
 			c.update = optarg;
 			if (strcmp(c.update, "devicesize") != 0 &&
 			    strcmp(c.update, "bbl") != 0 &&
+			    strcmp(c.update, "force-no-bbl") != 0 &&
 			    strcmp(c.update, "no-bbl") != 0) {
-				pr_err("only 'devicesize', 'bbl' and 'no-bbl' can be"
-					" updated with --re-add\n");
+				pr_err("only 'devicesize', 'bbl', 'no-bbl', and 'force-no-bbl' can be updated with --re-add\n");
 				exit(2);
 			}
 			continue;
@@ -822,8 +834,7 @@ int main(int argc, char *argv[])
 		case O(MONITOR,ConfigFile):
 		case O(CREATE,ConfigFile):
 			if (configfile) {
-				pr_err("configfile cannot be set twice.  "
-					"Second value is %s.\n", optarg);
+				pr_err("configfile cannot be set twice.  Second value is %s.\n", optarg);
 				exit(2);
 			}
 			configfile = optarg;
@@ -915,6 +926,16 @@ int main(int argc, char *argv[])
 		case O(MANAGE,Add): /* add a drive */
 			devmode = 'a';
 			continue;
+		case O(MANAGE,AddSpare): /* add drive - never re-add */
+			devmode = 'S';
+			continue;
+		case O(MANAGE,AddJournal): /* add journal */
+			if (s.journaldisks && (s.level < 4 || s.level > 6)) {
+				pr_err("--add-journal is only supported for RAID level 4/5/6.\n");
+				exit(2);
+			}
+			devmode = 'j';
+			continue;
 		case O(MANAGE,ReAdd):
 			devmode = 'A';
 			continue;
@@ -931,6 +952,9 @@ int main(int argc, char *argv[])
 					   * remove the device */
 			devmode = 'f';
 			continue;
+		case O(MANAGE, ClusterConfirm):
+			devmode = 'c';
+			continue;
 		case O(MANAGE,Replace):
 			/* Mark these devices for replacement */
 			devmode = 'R';
@@ -983,14 +1007,29 @@ int main(int argc, char *argv[])
 		case O(MISC, UpdateSubarray):
 		case O(MISC, Dump):
 		case O(MISC, Restore):
+		case O(MISC ,Action):
 			if (opt == KillSubarray || opt == UpdateSubarray) {
 				if (c.subarray) {
-					pr_err("subarray can only"
-						" be specified once\n");
+					pr_err("subarray can only be specified once\n");
 					exit(2);
 				}
 				c.subarray = optarg;
 			}
+			if (opt == Action) {
+				if (c.action) {
+					pr_err("Only one --action can be specified\n");
+					exit(2);
+				}
+				if (strcmp(optarg, "idle") == 0 ||
+				    strcmp(optarg, "frozen") == 0 ||
+				    strcmp(optarg, "check") == 0 ||
+				    strcmp(optarg, "repair") == 0)
+					c.action = optarg;
+				else {
+					pr_err("action must be one of idle, frozen, check, repair\n");
+					exit(2);
+				}
+			}
 			if (devmode && devmode != opt &&
 			    (devmode == 'E' || (opt == 'E' && devmode != 'Q'))) {
 				pr_err("--examine/-E cannot be given with ");
@@ -1018,12 +1057,10 @@ int main(int argc, char *argv[])
 			continue;
 		case O(MISC, UdevRules):
 			if (devmode && devmode != opt) {
-				pr_err("--udev-rules must"
-				       " be the only option.\n");
+				pr_err("--udev-rules must be the only option.\n");
 			} else {
 				if (udev_filename)
-					pr_err("only specify one udev "
-						"rule filename. %s ignored.\n",
+					pr_err("only specify one udev rule filename. %s ignored.\n",
 						optarg);
 				else
 					udev_filename = optarg;
@@ -1096,6 +1133,15 @@ int main(int argc, char *argv[])
 				s.bitmap_file = optarg;
 				continue;
 			}
+			if (strcmp(optarg, "clustered")== 0) {
+				s.bitmap_file = optarg;
+				/* Set the default number of cluster nodes
+				 * to 4 if not already set by user
+				 */
+				if (c.nodes < 1)
+					c.nodes = 4;
+				continue;
+			}
 			/* probable typo */
 			pr_err("bitmap file must contain a '/', or be 'internal', or 'none'\n"
 				"       not '%s'\n", optarg);
@@ -1136,6 +1182,23 @@ int main(int argc, char *argv[])
 		case O(INCREMENTAL, IncrementalPath):
 			remove_path = optarg;
 			continue;
+		case O(CREATE, WriteJournal):
+			if (s.journaldisks) {
+				pr_err("Please specify only one journal device for the array.\n");
+				pr_err("Ignoring --write-journal %s...\n", optarg);
+				continue;
+			}
+			dv = xmalloc(sizeof(*dv));
+			dv->devname = optarg;
+			dv->disposition = 'j';  /* WriteJournal */
+			dv->used = 0;
+			dv->next = NULL;
+			*devlistend = dv;
+			devlistend = &dv->next;
+			devs_found++;
+
+			s.journaldisks = 1;
+			continue;
 		}
 		/* We have now processed all the valid options. Anything else is
 		 * an error
@@ -1163,6 +1226,11 @@ int main(int argc, char *argv[])
 		exit(0);
 	}
 
+	if (s.journaldisks && (s.level < 4 || s.level > 6)) {
+		pr_err("--write-journal is only supported for RAID level 4/5/6.\n");
+		exit(2);
+	}
+
 	if (!mode && devs_found) {
 		mode = MISC;
 		devmode = 'Q';
@@ -1215,15 +1283,13 @@ int main(int argc, char *argv[])
 			/* non-existent device is OK */
 			mdfd = open_mddev(devlist->devname, 0);
 		if (mdfd == -2) {
-			pr_err("device %s exists but is not an "
-				"md array.\n", devlist->devname);
+			pr_err("device %s exists but is not an md array.\n", devlist->devname);
 			exit(1);
 		}
 		if ((int)ident.super_minor == -2) {
 			struct stat stb;
 			if (mdfd < 0) {
-				pr_err("--super-minor=dev given, and "
-					"listed device %s doesn't exist.\n",
+				pr_err("--super-minor=dev given, and listed device %s doesn't exist.\n",
 					devlist->devname);
 				exit(1);
 			}
@@ -1248,7 +1314,7 @@ int main(int argc, char *argv[])
 		}
 	}
 
-	if (c.homehost == NULL)
+	if (c.homehost == NULL && c.require_homehost)
 		c.homehost = conf_get_homehost(&c.require_homehost);
 	if (c.homehost == NULL || strcasecmp(c.homehost, "<system>")==0) {
 		if (gethostname(sys_hostname, sizeof(sys_hostname)) == 0) {
@@ -1261,6 +1327,20 @@ int main(int argc, char *argv[])
 		c.require_homehost = 0;
 	}
 
+	rv = 0;
+
+	set_hooks(); /* set hooks from libs */
+
+	if (c.homecluster == NULL && (c.nodes > 0)) {
+		c.homecluster = conf_get_homecluster();
+		if (c.homecluster == NULL)
+			rv = get_cluster_name(&c.homecluster);
+		if (rv) {
+			pr_err("The md can't get cluster name\n");
+			exit(1);
+		}
+	}
+
 	if (c.backup_file && data_offset != INVALID_SECTORS) {
 		pr_err("--backup-file and --data-offset are incompatible\n");
 		exit(2);
@@ -1280,7 +1360,6 @@ int main(int argc, char *argv[])
 		/* --scan implied --brief unless -vv */
 		c.brief = 1;
 
-	rv = 0;
 	switch(mode) {
 	case MANAGE:
 		/* readonly, add/remove, readwrite, runstop */
@@ -1367,8 +1446,9 @@ int main(int argc, char *argv[])
 		}
 
 		if (s.bitmap_file) {
-			if (strcmp(s.bitmap_file, "internal")==0) {
-				pr_err("'internal' bitmaps not supported with --build\n");
+			if (strcmp(s.bitmap_file, "internal")==0 ||
+			    strcmp(s.bitmap_file, "clustered") == 0) {
+				pr_err("'internal' and 'clustered' bitmaps not supported with --build\n");
 				rv |= 1;
 				break;
 			}
@@ -1378,6 +1458,21 @@ int main(int argc, char *argv[])
 	case CREATE:
 		if (c.delay == 0)
 			c.delay = DEFAULT_BITMAP_DELAY;
+
+		if (c.nodes) {
+			if (!s.bitmap_file || strcmp(s.bitmap_file, "clustered") != 0) {
+				pr_err("--nodes argument only compatible with --bitmap=clustered\n");
+				rv = 1;
+				break;
+			}
+
+			if (s.level != 1) {
+				pr_err("--bitmap=clustered is currently supported with RAID mirror only\n");
+				rv = 1;
+				break;
+			}
+		}
+
 		if (s.write_behind && !s.bitmap_file) {
 			pr_err("write-behind mode requires a bitmap.\n");
 			rv = 1;
@@ -1443,8 +1538,6 @@ int main(int argc, char *argv[])
 			else
 				c.delay = 60;
 		}
-		if (c.delay == 0)
-			c.delay = 60;
 		rv= Monitor(devlist, mailaddr, program,
 			    &c, daemonise, oneshot,
 			    dosyslog, pidfile, increments,
@@ -1461,8 +1554,7 @@ int main(int argc, char *argv[])
 			struct mdinfo sra;
 			int err;
 			if (s.raiddisks || s.level != UnSet) {
-				pr_err("cannot change array size in same operation "
-					"as changing raiddisks or level.\n"
+				pr_err("cannot change array size in same operation as changing raiddisks or level.\n"
 					"    Change size first, then check that data is still intact.\n");
 				rv = 1;
 				break;
@@ -1474,11 +1566,9 @@ int main(int argc, char *argv[])
 				err = sysfs_set_num(&sra, NULL, "array_size", array_size / 2);
 			if (err < 0) {
 				if (errno == E2BIG)
-					pr_err("--array-size setting"
-						" is too large.\n");
+					pr_err("--array-size setting is too large.\n");
 				else
-					pr_err("current kernel does"
-						" not support setting --array-size\n");
+					pr_err("current kernel does not support setting --array-size\n");
 				rv = 1;
 				break;
 			}
@@ -1486,8 +1576,7 @@ int main(int argc, char *argv[])
 		if (devs_found > 1 && s.raiddisks == 0 && s.level == UnSet) {
 			/* must be '-a'. */
 			if (s.size > 0 || s.chunk || s.layout_str != NULL || s.bitmap_file) {
-				pr_err("--add cannot be used with "
-					"other geometry changes in --grow mode\n");
+				pr_err("--add cannot be used with other geometry changes in --grow mode\n");
 				rv = 1;
 				break;
 			}
@@ -1500,9 +1589,7 @@ int main(int argc, char *argv[])
 		} else if (s.bitmap_file) {
 			if (s.size > 0 || s.raiddisks || s.chunk ||
 			    s.layout_str != NULL || devs_found > 1) {
-				pr_err("--bitmap changes cannot be "
-					"used with other geometry changes "
-					"in --grow mode\n");
+				pr_err("--bitmap changes cannot be used with other geometry changes in --grow mode\n");
 				rv = 1;
 				break;
 			}
@@ -1549,16 +1636,16 @@ int main(int argc, char *argv[])
 			}
 			break;
 		}
-		if (devlist->next) {
-			pr_err("--incremental can only handle one device.\n");
-			rv = 1;
-			break;
-		}
-		if (devmode == 'f')
+		if (devmode == 'f') {
+			if (devlist->next) {
+				pr_err("'--incremental --fail' can only handle one device.\n");
+				rv = 1;
+				break;
+			}
 			rv = IncrementalRemove(devlist->devname, remove_path,
 					       c.verbose);
-		else
-			rv = Incremental(devlist->devname, &c, ss);
+		} else
+			rv = Incremental(devlist, &c, ss);
 		break;
 	case AUTODETECT:
 		autodetect();
@@ -1579,8 +1666,7 @@ static int scan_assemble(struct supertype *ss,
 	int failures, successes;
 
 	if (conf_verify_devnames(array_list)) {
-		pr_err("Duplicate MD device names in "
-		       "conf file were found.\n");
+		pr_err("Duplicate MD device names in conf file were found.\n");
 		return 1;
 	}
 	if (devlist == NULL) {
@@ -1593,9 +1679,7 @@ static int scan_assemble(struct supertype *ss,
 			a->autof = c->autof;
 	}
 	if (map_lock(&map))
-		pr_err("%s: failed to get "
-		       "exclusive lock on mapfile\n",
-		       __func__);
+		pr_err("failed to get exclusive lock on mapfile\n");
 	do {
 		failures = 0;
 		successes = 0;
@@ -1685,7 +1769,7 @@ static int misc_scan(char devmode, struct context *c)
 
 			if (!name) {
 				pr_err("cannot find device file for %s\n",
-					e->dev);
+					e->devnm);
 				continue;
 			}
 			if (devmode == 'D')
@@ -1720,7 +1804,7 @@ static int stop_scan(int verbose)
 
 			if (!name) {
 				pr_err("cannot find device file for %s\n",
-					e->dev);
+					e->devnm);
 				continue;
 			}
 			mdfd = open_mddev(name, 1);
@@ -1798,6 +1882,9 @@ static int misc_list(struct mddev_dev *devlist,
 			rv |= Restore_metadata(dv->devname, dump_directory, c, ss,
 					       (dv == devlist && dv->next == NULL));
 			continue;
+		case Action:
+			rv |= SetAction(dv->devname, c->action);
+			continue;
 		}
 		if (dv->devname[0] == '/')
 			mdfd = open_mddev(dv->devname, 1);
@@ -1824,3 +1911,26 @@ static int misc_list(struct mddev_dev *devlist,
 	}
 	return rv;
 }
+
+int SetAction(char *dev, char *action)
+{
+	int fd = open(dev, O_RDONLY);
+	struct mdinfo mdi;
+	if (fd < 0) {
+		pr_err("Couldn't open %s: %s\n", dev, strerror(errno));
+		return 1;
+	}
+	sysfs_init(&mdi, fd, NULL);
+	close(fd);
+	if (!mdi.sys_name[0]) {
+		pr_err("%s is no an md array\n", dev);
+		return 1;
+	}
+
+	if (sysfs_set_str(&mdi, NULL, "sync_action", action) < 0) {
+		pr_err("Count not set action for %s to %s: %s\n",
+		       dev, action, strerror(errno));
+		return 1;
+	}
+	return 0;
+}