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authorGoldwyn Rodrigues <rgoldwyn@suse.com>2014-03-29 10:20:02 -0500
committerGoldwyn Rodrigues <rgoldwyn@suse.com>2015-02-23 07:28:42 -0600
commitc4ce867fdad200dfd8aa8cbe1eabc26c14c51635 (patch)
tree529e265c90fbc91a3d4fe8a327f9d7ff9a284890 /drivers/md/md.h
parentedb39c9deda87da5aad9c090e2e8eaf8470c852c (diff)
downloadlinux-c4ce867fdad200dfd8aa8cbe1eabc26c14c51635.tar.bz2
Introduce md_cluster_info
md_cluster_info stores the cluster information in the MD device. The join() is called when mddev detects it is a clustered device. The main responsibilities are: 1. Setup a DLM lockspace 2. Setup all initial locks such as super block locks and bitmap lock (will come later) The leave() clears up the lockspace and all the locks held. Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Diffstat (limited to 'drivers/md/md.h')
-rw-r--r--drivers/md/md.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/md/md.h b/drivers/md/md.h
index 018593197c4d..80fc89976915 100644
--- a/drivers/md/md.h
+++ b/drivers/md/md.h
@@ -203,6 +203,8 @@ extern int rdev_clear_badblocks(struct md_rdev *rdev, sector_t s, int sectors,
int is_new);
extern void md_ack_all_badblocks(struct badblocks *bb);
+struct md_cluster_info;
+
struct mddev {
void *private;
struct md_personality *pers;
@@ -431,6 +433,7 @@ struct mddev {
unsigned long daemon_sleep; /* how many jiffies between updates? */
unsigned long max_write_behind; /* write-behind mode */
int external;
+ int nodes; /* Maximum number of nodes in the cluster */
} bitmap_info;
atomic_t max_corr_read_errors; /* max read retries */
@@ -449,6 +452,7 @@ struct mddev {
struct work_struct flush_work;
struct work_struct event_work; /* used by dm to report failure event */
void (*sync_super)(struct mddev *mddev, struct md_rdev *rdev);
+ struct md_cluster_info *cluster_info;
};
static inline int __must_check mddev_lock(struct mddev *mddev)
@@ -676,4 +680,8 @@ static inline void rdev_dec_pending(struct md_rdev *rdev, struct mddev *mddev)
}
extern struct md_cluster_operations *md_cluster_ops;
+static inline int mddev_is_clustered(struct mddev *mddev)
+{
+ return mddev->cluster_info && mddev->bitmap_info.nodes > 1;
+}
#endif /* _MD_MD_H */