From a822017f30e0dadc60a687900c2aa4da32e09a93 Mon Sep 17 00:00:00 2001
From: Mariusz Tkaczyk <mariusz.tkaczyk@intel.com>
Date: Thu, 10 Aug 2017 11:43:48 +0200
Subject: [PATCH] Detail: correct output for active arrays

The check for inactive array is incorrect as it compares it against
active array. Introduce a new function md_is_array_active so the check
is consistent across the code.

As the output contains list of disks in the array include this
information in sysfs read.

Signed-off-by: Mariusz Tkaczyk <mariusz.tkaczyk@intel.com>
Signed-off-by: Jes Sorensen <jsorensen@fb.com>
---
 Detail.c | 15 +++++++--------
 mdadm.h  |  1 +
 util.c   | 15 +++++++++------
 3 files changed, 17 insertions(+), 14 deletions(-)

diff --git a/Detail.c b/Detail.c
index 2332b852..2c9fb240 100644
--- a/Detail.c
+++ b/Detail.c
@@ -86,7 +86,8 @@ int Detail(char *dev, struct context *c)
 			dev, strerror(errno));
 		return rv;
 	}
-	sra = sysfs_read(fd, NULL, GET_VERSION | GET_DEVS | GET_ARRAY_STATE);
+	sra = sysfs_read(fd, NULL, GET_VERSION | GET_DEVS |
+			GET_ARRAY_STATE | GET_STATE);
 	if (!sra) {
 		if (md_get_array_info(fd, &array)) {
 			pr_err("%s does not appear to be an md device\n", dev);
@@ -96,8 +97,7 @@ int Detail(char *dev, struct context *c)
 	}
 	external = (sra != NULL && sra->array.major_version == -1 &&
 		    sra->array.minor_version == -2);
-	inactive = (sra->array_state == ARRAY_ACTIVE ||
-		    sra->array_state == ARRAY_CLEAR);
+	inactive = (sra != NULL && !md_array_is_active(sra));
 	st = super_by_fd(fd, &subarray);
 	if (md_get_array_info(fd, &array)) {
 		if (errno == ENODEV) {
@@ -314,11 +314,10 @@ int Detail(char *dev, struct context *c)
 	next = array.raid_disks * 2;
 	if (inactive) {
 		struct mdinfo *mdi;
-		if (sra != NULL)
-			for (mdi = sra->devs; mdi; mdi = mdi->next) {
-				disks[next++] = mdi->disk;
-				disks[next - 1].number = -1;
-			}
+		for (mdi = sra->devs; mdi; mdi = mdi->next) {
+			disks[next++] = mdi->disk;
+			disks[next - 1].number = -1;
+		}
 	} else for (d = 0; d < max_disks; d++) {
 		mdu_disk_info_t disk;
 		disk.number = d;
diff --git a/mdadm.h b/mdadm.h
index ee9b8373..191ae8f7 100644
--- a/mdadm.h
+++ b/mdadm.h
@@ -1425,6 +1425,7 @@ extern int Restore_metadata(char *dev, char *dir, struct context *c,
 
 int md_array_valid(int fd);
 int md_array_active(int fd);
+int md_array_is_active(struct mdinfo *info);
 int md_get_array_info(int fd, struct mdu_array_info_s *array);
 int md_set_array_info(int fd, struct mdu_array_info_s *array);
 int md_get_disk_info(int fd, struct mdu_disk_info_s *disk);
diff --git a/util.c b/util.c
index 8eeb509a..c1c85095 100644
--- a/util.c
+++ b/util.c
@@ -228,15 +228,11 @@ int md_array_active(int fd)
 {
 	struct mdinfo *sra;
 	struct mdu_array_info_s array;
-	int ret;
+	int ret = 0;
 
 	sra = sysfs_read(fd, NULL, GET_ARRAY_STATE);
 	if (sra) {
-		if (sra->array_state != ARRAY_CLEAR &&
-		    sra->array_state != ARRAY_INACTIVE &&
-		    sra->array_state != ARRAY_UNKNOWN_STATE)
-			ret = 0;
-		else
+		if (!md_array_is_active(sra))
 			ret = -ENODEV;
 
 		free(sra);
@@ -251,6 +247,13 @@ int md_array_active(int fd)
 	return !ret;
 }
 
+int md_array_is_active(struct mdinfo *info)
+{
+	return (info->array_state != ARRAY_CLEAR &&
+		info->array_state != ARRAY_INACTIVE &&
+		info->array_state != ARRAY_UNKNOWN_STATE);
+}
+
 /*
  * Get array info from the kernel. Longer term we want to deprecate the
  * ioctl and get it from sysfs.
-- 
2.39.2