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| author | Goldwyn Rodrigues <rgoldwyn@suse.com> | 2014-03-29 10:20:02 -0500 |
|---|---|---|
| committer | Goldwyn Rodrigues <rgoldwyn@suse.com> | 2015-02-23 07:28:42 -0600 |
| commit | c4ce867fdad200dfd8aa8cbe1eabc26c14c51635 (patch) | |
| tree | 529e265c90fbc91a3d4fe8a327f9d7ff9a284890 /drivers/md/md.h | |
| parent | edb39c9deda87da5aad9c090e2e8eaf8470c852c (diff) | |
| download | linux-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.h | 8 |
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 */ |