path: root/include
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authorNeilBrown <neilb@suse.de>2008-07-21 17:05:25 +1000
committerNeilBrown <neilb@suse.de>2008-07-21 17:05:25 +1000
commitf2ea68cf42aafdd93393b6b8b20fc3c2b5f4390c (patch)
tree00b025b91898ff32dba742b5075dd290fec4dc91 /include
parentmd: linear: Make array_size sector-based and rename it to array_sectors. (diff)
md: only count actual openers as access which prevent a 'stop'
Open isn't the only thing that increments ->active. e.g. reading /proc/mdstat will increment it briefly. So to avoid false positives in testing for concurrent access, introduce a new counter that counts just the number of times the md device it open. Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'include')
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/raid/md_k.h b/include/linux/raid/md_k.h
index 6f72b47ae41c..4bef4791d80d 100644
--- a/include/linux/raid/md_k.h
+++ b/include/linux/raid/md_k.h
@@ -215,7 +215,8 @@ struct mddev_s
int in_sync; /* know to not need resync */
struct mutex reconfig_mutex;
- atomic_t active;
+ atomic_t active; /* general refcount */
+ atomic_t openers; /* number of active opens */
int changed; /* true if we might need to reread partition info */
int degraded; /* whether md should consider