20 #include "recovery.h"
345  * dlm/gfs2 recovery coordination using dlm_recover callbacks
351  *  4. dlm_controld starts and finishes its own user level recovery
352  *  5. dlm_controld starts dlm-kernel dlm_recoverd to do kernel recovery
354  *  7. dlm_recoverd does its own lock recovery
360  * 13. gfs2_recover provides recovery results to gfs2_control (recovery_result)
364  * - failures during recovery
391  * - parallel recovery steps across all nodes
406  *   and missing a journal recovery?
417  * require recovery, because the mount in step 4 could not have
421  * and returning.  The mount in step 4 waits until the recovery in
427  * and recover any that need recovery before other nodes are allowed
437  * The mounted_lock is demoted to PR when first recovery is done, so
441  * mounter is doing first mount recovery of all journals.
444  * the first mount recovery, blocking mounts from other nodes, then demotes
452  * do first mounter recovery
464  * - mount during recovery
466  * If a node mounts while others are doing recovery (not first mounter),
482  * that jid N needs recovery.
641 	 * FIRST_MOUNT means this node is doing first mounter recovery,  in gfs2_control_func()
642 	 * for which recovery control is handled by  in gfs2_control_func()
657 	 * dlm recovery is in progress and dlm locking is blocked.  in gfs2_control_func()
666 	 * dlm_recoverd adds to recover_submit[] jids needing recovery  in gfs2_control_func()
667 	 * gfs2_recover adds to recover_result[] journal recovery results  in gfs2_control_func()
673 	 * the journal recovery is SUCCESS  in gfs2_control_func()
701 		 * in succession.  Only the first will really do recovery,  in gfs2_control_func()
703 		 * recovery.  So, another node may have already recovered  in gfs2_control_func()
767 	 * and clear a jid bit in the lvb if the recovery is a success.  in gfs2_control_func()
784 	 * No more jid bits set in lvb, all recovery is done, unblock locks  in gfs2_control_func()
852 	 * Other nodes need to do some work in dlm recovery and gfs2_control  in control_mount()
875 	 * we cannot do the first-mount responsibility it implies: recovery.  in control_mount()
921 		/* first mounter, keep both EX while doing first recovery */  in control_mount()
942 		/* journals need recovery, wait until all are clear */  in control_mount()
943 		fs_info(sdp, "control_mount wait for journal recovery\n");  in control_mount()
954 		   generation, which might include new recovery bits set */  in control_mount()
956 			fs_info(sdp, "Recovery is required. Waiting for a "  in control_mount()
971 		   latest recovery generation */  in control_mount()
980 		/* dlm recovery in progress, wait for it to finish */  in control_mount()
1025 		 * Wait for the end of a dlm recovery cycle to switch from  in control_first_done()
1026 		 * first mounter recovery.  We can ignore any recover_slot  in control_first_done()
1029 		 * have not fully mounted, so they don't need recovery.  in control_first_done()
1126 /* dlm calls before it does lock recovery */
1180 /* dlm calls after recover_slot and after it completes lock recovery */
1212 /* gfs2_recover thread has a journal recovery result */
1227 	/* don't care about the recovery of own journal during mount */  in gdlm_recovery_result()
1388 	/* mounted_lock and control_lock will be purged in dlm recovery */  in gdlm_unmount()