Modify mdu_array_info_t in md_u.h to add additional journal_disks
member which contains number of journal disks, and expose this
information via the mdadm --detail option.
This depends on a corresponding kernel patch, which modifies the
GET_ARRAY_INFO ioctl to store this information in the member.
Signed-off-by: Phillip Potter <phil@xxxxxxxxxxxxxxxx>
---
diff --git a/Detail.c b/Detail.c
index b3e857a..5ae4b89 100644
--- a/Detail.c
+++ b/Detail.c
@@ -509,6 +509,9 @@ int Detail(char *dev, struct context *c)
printf(" Failed Devices : %d\n", array.failed_disks);
printf(" Spare Devices : %d\n", array.spare_disks);
}
+ if (array.journal_disks) {
+ printf(" Journal Devices : %d\n", array.journal_disks);
+ }
printf("\n");
if (array.level == 5) {
str = map_num(r5layout, array.layout);
diff --git a/md_u.h b/md_u.h
index 2d66d52..9607725 100644
--- a/md_u.h
+++ b/md_u.h
@@ -69,6 +69,7 @@ typedef struct mdu_array_info_s {
int working_disks; /* 3 Number of working disks */
int failed_disks; /* 4 Number of failed disks */
int spare_disks; /* 5 Number of spare disks */
+ int journal_disks; /* 6 Number of journal disks for RAID-5/6 */
/*
* Personality information
