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authorNeilBrown <neilb@suse.de>2009-12-14 12:49:56 +1100
committerNeilBrown <neilb@suse.de>2009-12-14 12:51:41 +1100
commitece5cff0da9e696c360fff592cb5f51b6419e4d6 (patch)
tree1c5cab0e89ae466be9edb476ceb91e5c898fafa6 /drivers/md/md.h
parent624ce4f5658fa3e0303c1217bba2706142fe7568 (diff)
md: Support write-intent bitmaps with externally managed metadata.
In this case, the metadata needs to not be in the same sector as the bitmap. md will not read/write any bitmap metadata. Config must be done via sysfs and when a recovery makes the array non-degraded again, writing 'true' to 'bitmap/can_clear' will allow bits in the bitmap to be cleared again. Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers/md/md.h')
-rw-r--r--drivers/md/md.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/md/md.h b/drivers/md/md.h
index fce02073f1a..d9138885b87 100644
--- a/drivers/md/md.h
+++ b/drivers/md/md.h
@@ -296,6 +296,7 @@ struct mddev_s
unsigned long chunksize;
unsigned long daemon_sleep; /* how many seconds between updates? */
unsigned long max_write_behind; /* write-behind mode */
+ int external;
} bitmap_info;
struct list_head all_mddevs;