mdstat: discard 'dev' field, just use 'devnm'

These both have the same value, and have done since the
'devnm' concept was introduced.
So discard the pointless duplicate.

Signed-off-by: NeilBrown <neilb@suse.de>

Incremental.c

@@ -1726,7 +1726,7 @@ int IncrementalRemove(char *devname, char *id_path, int verbose)
 	mdfd = open_dev(ent->devnm);
 	if (mdfd < 0) {
 		if (verbose >= 0)
-			pr_err("Cannot open array %s!!\n", ent->dev);
+			pr_err("Cannot open array %s!!\n", ent->devnm);
 		free_mdstat(ent);
 		return 1;
 	}
@@ -1748,11 +1748,11 @@ int IncrementalRemove(char *devname, char *id_path, int verbose)
 		struct mdstat_ent *mdstat = mdstat_read(0, 0);
 		struct mdstat_ent *memb;
 		for (memb = mdstat ; memb ; memb = memb->next)
-			if (is_container_member(memb, ent->dev)) {
+			if (is_container_member(memb, ent->devnm)) {
 				int subfd = open_dev(memb->devnm);
 				if (subfd >= 0) {
 					rv |= Manage_subdevs(
-						memb->dev, subfd,
+						memb->devnm, subfd,
 						&devlist, verbose, 0,
 						NULL, 0);
 					close(subfd);
@@ -1760,7 +1760,7 @@ int IncrementalRemove(char *devname, char *id_path, int verbose)
 			}
 		free_mdstat(mdstat);
 	} else
-		rv |= Manage_subdevs(ent->dev, mdfd, &devlist,
+		rv |= Manage_subdevs(ent->devnm, mdfd, &devlist,
 				    verbose, 0, NULL, 0);
 	if (rv & 2) {
 		/* Failed due to EBUSY, try to stop the array.
@@ -1768,7 +1768,7 @@ int IncrementalRemove(char *devname, char *id_path, int verbose)
 		 */
 		int devid = devnm2devid(ent->devnm);
 		run_udisks("--unmount", map_dev(major(devid),minor(devid), 0));
-		rv = Manage_stop(ent->dev, mdfd, verbose, 1);
+		rv = Manage_stop(ent->devnm, mdfd, verbose, 1);
 		if (rv)
 			/* At least we can try to trigger a 'remove' */
 			sysfs_uevent(&mdi, "remove");
@@ -1778,7 +1778,7 @@ int IncrementalRemove(char *devname, char *id_path, int verbose)
 		}
 	} else {
 		devlist.disposition = 'r';
-		rv = Manage_subdevs(ent->dev, mdfd, &devlist,
+		rv = Manage_subdevs(ent->devnm, mdfd, &devlist,
 				    verbose, 0, NULL, 0);
 	}
 	close(mdfd);

Manage.c

@@ -316,7 +316,7 @@ int Manage_stop(char *devname, int fd, int verbose, int will_retry)
 						       devnm)) {
 				if (verbose >= 0)
 					pr_err("Cannot stop container %s: member %s still active\n",
-					       devname, m->dev);
+					       devname, m->devnm);
 				free_mdstat(mds);
 				rv = 1;
 				goto out;

config.c

@@ -167,10 +167,10 @@ struct mddev_dev *load_containers(void)
 		    !is_subarray(&ent->metadata_version[9])) {
 			d = xmalloc(sizeof(*d));
 			memset(d, 0, sizeof(*d));
-			me = map_by_devnm(&map, ent->dev);
+			me = map_by_devnm(&map, ent->devnm);
 			if (me)
 				d->devname = xstrdup(me->path);
-			else if (asprintf(&d->devname, "/dev/%s", ent->dev) < 0) {
+			else if (asprintf(&d->devname, "/dev/%s", ent->devnm) < 0) {
 				free(d);
 				continue;
 			}

mdadm.c

@@ -1675,7 +1675,7 @@ 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')
@@ -1710,7 +1710,7 @@ 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);

mdadm.h

@@ -453,7 +453,6 @@ typedef struct mapping {
 } mapping_t;
 
 struct mdstat_ent {
-	char		*dev;
 	char		devnm[32];
 	int		active;
 	char		*level;

mdstat.c

@@ -114,7 +114,6 @@ void free_mdstat(struct mdstat_ent *ms)
 {
 	while (ms) {
 		struct mdstat_ent *t;
-		free(ms->dev);
 		free(ms->level);
 		free(ms->pattern);
 		free(ms->metadata_version);
@@ -169,7 +168,7 @@ struct mdstat_ent *mdstat_read(int hold, int start)
 		strcpy(devnm, line);
 
 		ent = xmalloc(sizeof(*ent));
-		ent->dev = ent->level = ent->pattern= NULL;
+		ent->level = ent->pattern= NULL;
 		ent->next = NULL;
 		ent->percent = RESYNC_NONE;
 		ent->active = -1;
@@ -179,7 +178,6 @@ struct mdstat_ent *mdstat_read(int hold, int start)
 		ent->devcnt = 0;
 		ent->members = NULL;
 
-		ent->dev = xstrdup(line);
 		strcpy(ent->devnm, devnm);
 
 		for (w=dl_next(line); w!= line ; w=dl_next(w)) {

msg.c

@@ -395,7 +395,7 @@ int block_monitor(char *container, const int freeze)
 			sysfs_free(sra);
 			sra = sysfs_read(-1, e2->devnm, GET_VERSION);
 			if (unblock_subarray(sra, freeze))
-				pr_err("Failed to unfreeze %s\n", e2->dev);
+				pr_err("Failed to unfreeze %s\n", e2->devnm);
 		}
 
 		ping_monitor(container); /* cleared frozen */
@@ -431,7 +431,7 @@ void unblock_monitor(char *container, const int unfreeze)
 		if (sra->array.level > 0)
 			to_ping++;
 		if (unblock_subarray(sra, unfreeze))
-			pr_err("Failed to unfreeze %s\n", e->dev);
+			pr_err("Failed to unfreeze %s\n", e->devnm);
 	}
 	if (to_ping)
 		ping_monitor(container);

super-intel.c

@@ -5585,15 +5585,15 @@ active_arrays_by_format(char *name, char* hba, struct md_list **devlist,
 				for (vol = mdstat ; vol ; vol = vol->next) {
 					if ((vol->active > 0) &&
 					    vol->metadata_version &&
-					    is_container_member(vol, memb->dev)) {
+					    is_container_member(vol, memb->devnm)) {
 						found++;
 						count++;
 					}
 				}
 				if (*devlist && (found < dpa)) {
 					dv = xcalloc(1, sizeof(*dv));
-					dv->devname = xmalloc(strlen(memb->dev) + strlen("/dev/") + 1);
-					sprintf(dv->devname, "%s%s", "/dev/", memb->dev);
+					dv->devname = xmalloc(strlen(memb->devnm) + strlen("/dev/") + 1);
+					sprintf(dv->devname, "%s%s", "/dev/", memb->devnm);
 					dv->found = found;
 					dv->used = 0;
 					dv->next = *devlist;