104 Commits

Author	SHA1	Message	Date
Goldwyn Rodrigues	c4ce867fda	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>	2015-02-23 07:28:42 -06:00
Goldwyn Rodrigues	edb39c9ded	Introduce md_cluster_operations to handle cluster functions ... This allows dynamic registering of cluster hooks. Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>	2015-02-23 07:28:42 -06:00
Goldwyn Rodrigues	47741b7ca7	DLM lock and unlock functions ... A dlm_lock_resource is a structure which contains all information required for locking using DLM. The init function allocates the lock and acquires the lock in NL mode. The unlock function converts the lock resource to NL mode. This is done to preserve LVB and for faster processing of locks. The lock resource is DLM unlocked only in the lockres_free function, which is the end of life of the lock resource. Signed-off-by: Lidong Zhong <lzhong@suse.com> Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>	2015-02-23 07:28:42 -06:00
Goldwyn Rodrigues	8e854e9cfd	Create a separate module for clustering support ... Tagged as EXPERIMENTAL for now. Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>	2015-02-23 07:28:42 -06:00