Manage: freeze recovery while adding multiple devices.

If the kernel supports it, freeze recovery over multiple adds,
so that they can all be added to the array at the same time and
be recovered in parallel.

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

1 files changed, 13 insertions, 0 deletions

diff --git a/Manage.c b/Manage.c
index f53fe27..7deba3a 100644
--- a/Manage.c
+++ b/Manage.c
@@ -416,12 +416,15 @@ int Manage_subdevs(char *devname, int fd,
 	int lfd = -1;
 	int sysfd = -1;
 	int count = 0; /* number of actions taken */
+	struct mdinfo info;
+	int frozen = 0;
 
 	if (ioctl(fd, GET_ARRAY_INFO, &array)) {
 		fprintf(stderr, Name ": cannot get array info for %s\n",
 			devname);
 		goto abort;
 	}
+	sysfs_init(&info, fd, 0);
 
 	/* array.size is only 32 bit and may be truncated.
 	 * So read from sysfs if possible, and record number of sectors
@@ -629,6 +632,12 @@ int Manage_subdevs(char *devname, int fd,
 					dv->devname, strerror(errno));
 				goto abort;
 			}
+			if (!frozen) {
+				if (sysfs_freeze_array(&info) == 1)
+					frozen = 1;
+				else
+					frozen = -1;
+			}
 
 			st = dup_super(tst);
 
@@ -1166,11 +1175,15 @@ int Manage_subdevs(char *devname, int fd,
 			break;
 		}
 	}
+	if (frozen > 0)
+		sysfs_set_str(&info, NULL, "sync_action","idle");
 	if (test && count == 0)
 		return 2;
 	return 0;
 
 abort:
+	if (frozen > 0)
+		sysfs_set_str(&info, NULL, "sync_action","idle");
 	return 1;
 }