From e27d562bcc3936d8988a46943881e2641d3d9036 Mon Sep 17 00:00:00 2001
From: Neil Brown <neilb@suse.de>
Date: Tue, 28 Mar 2006 23:02:45 +0000
Subject: [PATCH] Reduce dependance on MD_SB_DISKS

--monitor should now work with arrays larger than 28 devices.

Signed-off-by: Neil Brown <neilb@suse.de>
---
 Detail.c  |  2 +-
 Monitor.c | 24 +++++++++++++++++-------
 mdadm.c   |  2 +-
 3 files changed, 19 insertions(+), 9 deletions(-)

diff --git a/Detail.c b/Detail.c
index 25b31c48..8fa044a5 100644
--- a/Detail.c
+++ b/Detail.c
@@ -53,7 +53,7 @@ int Detail(char *dev, int brief, int test)
 	int is_rebuilding = 0;
 	int failed = 0;
 	struct supertype *st = NULL;
-	int max_disks = MD_SB_DISKS;
+	int max_disks = MD_SB_DISKS; /* just a default */
 	struct mdinfo info;
 
 	void *super = NULL;
diff --git a/Monitor.c b/Monitor.c
index 0ab5e0ce..55f5c967 100644
--- a/Monitor.c
+++ b/Monitor.c
@@ -46,6 +46,11 @@ static char *percentalerts[] = {
 	"Rebuild80",
 };
 
+/* The largest number of disks current arrays can manage is 384
+ * This really should be dynamically, but that will have to wait
+ * At least it isn't MD_SB_DISKS.
+ */
+#define MaxDisks 384
 int Monitor(mddev_dev_t devlist,
 	    char *mailaddr, char *alert_cmd,
 	    int period, int daemonise, int scan, int oneshot,
@@ -101,8 +106,8 @@ int Monitor(mddev_dev_t devlist,
 		char *spare_group;
 		int active, working, failed, spare, raid;
 		int expected_spares;
-		int devstate[MD_SB_DISKS];
-		int devid[MD_SB_DISKS];
+		int devstate[MaxDisks];
+		int devid[MaxDisks];
 		int percent;
 		struct state *next;
 	} *statelist = NULL;
@@ -300,21 +305,26 @@ int Monitor(mddev_dev_t devlist,
 
 			if (mse)
 				st->percent = mse->percent;
-					
-			for (i=0; i<MD_SB_DISKS; i++) {
+
+			for (i=0; i<MaxDisks; i++) {
 				mdu_disk_info_t disc;
 				int newstate=0;
 				int change;
 				char *dv = NULL;
 				disc.number = i;
-				if (ioctl(fd, GET_DISK_INFO, &disc)>= 0) {
+				if (i > array.raid_disks + array.nr_disks) {
+					newstate = 0;
+					disc.major = disc.minor = 0;
+				} else if (ioctl(fd, GET_DISK_INFO, &disc)>= 0) {
 					newstate = disc.state;
 					dv = map_dev(disc.major, disc.minor, 1);
-				} else if (mse &&  mse->pattern && i < strlen(mse->pattern))
+				} else if (mse &&  mse->pattern && i < strlen(mse->pattern)) {
 					switch(mse->pattern[i]) {
 					case 'U': newstate = 6 /* ACTIVE/SYNC */; break;
 					case '_': newstate = 0; break;
 					}
+					disc.major = disc.minor = 0;
+				}
 				if (dv == NULL && st->devid[i])
 					dv = map_dev(major(st->devid[i]),
 						     minor(st->devid[i]), 1);
@@ -412,7 +422,7 @@ int Monitor(mddev_dev_t devlist,
 							if (fd2>=0) close(fd2);
 							continue;
 						}
-						for (d=st2->raid; d<MD_SB_DISKS; d++) {
+						for (d=st2->raid; d < MaxDisks; d++) {
 							if (st2->devid[d] > 0 &&
 							    st2->devstate[d] == 0) {
 								dev = st2->devid[d];
diff --git a/mdadm.c b/mdadm.c
index 6e57c5bc..b32158ed 100644
--- a/mdadm.c
+++ b/mdadm.c
@@ -49,7 +49,7 @@ int main(int argc, char *argv[])
 	int level = UnSet;
 	int layout = UnSet;
 	int raiddisks = 0;
-	int max_disks = MD_SB_DISKS;
+	int max_disks = MD_SB_DISKS; /* just a default */
 	int sparedisks = 0;
 	struct mddev_ident_s ident;
 	char *configfile = NULL;
-- 
2.39.2