Commit 0e0f3d9a authored by Kozlowski Mateusz's avatar Kozlowski Mateusz Committed by Jim Harris
Browse files

FTL: Shared memory recovery 



Adds valid map and L2P restroration for shared memory (crash) recovery.

Signed-off-by: default avatarKozlowski Mateusz <mateusz.kozlowski@intel.com>
Signed-off-by: default avatarArtur Paszkiewicz <artur.paszkiewicz@intel.com>
Change-Id: Ia4e0cc6cd552ea61dca8985a26aa55c84a1233db
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/13369


Tested-by: default avatarSPDK CI Jenkins <sys_sgci@intel.com>
Community-CI: Mellanox Build Bot
Reviewed-by: default avatarJim Harris <james.r.harris@intel.com>
Reviewed-by: default avatarBen Walker <benjamin.walker@intel.com>
parent 764a3675

lib/ftl/mngt/ftl_mngt_recovery.c

+42 −0
Original line number Diff line number Diff line
@@ -37,6 +37,7 @@ struct ftl_mngt_recovery_ctx { 
};



static const struct ftl_mngt_process_desc g_desc_recovery;

static const struct ftl_mngt_process_desc g_desc_recovery_shm;



static void

recovery_iter_advance(struct spdk_ftl_dev *dev, struct ftl_mngt_recovery_ctx *ctx)
@@ -215,6 +216,23 @@ ftl_mngt_recover_seq_id(struct spdk_ftl_dev *dev, struct ftl_mngt_process *mngt) 
	ftl_mngt_next_step(mngt);

}



static void

ftl_mngt_restore_valid_counters(struct spdk_ftl_dev *dev, struct ftl_mngt_process *mngt)

{

	ftl_valid_map_load_state(dev);

	ftl_mngt_next_step(mngt);

}



static void

ftl_mngt_recovery_shm_l2p(struct spdk_ftl_dev *dev, struct ftl_mngt_process *mngt)

{

	if (ftl_fast_recovery(dev)) {

		ftl_mngt_call_process(mngt, &g_desc_recovery_shm);

	} else {

		ftl_mngt_skip_step(mngt);

	}

}



/*

 * Loading of FTL after dirty shutdown. Recovers metadata, L2P, decides on amount of recovery

 * iterations to be executed (dependent on ratio of L2P cache size and total L2P size)
@@ -245,6 +263,10 @@ static const struct ftl_mngt_process_desc g_desc_recovery = { 
			.action = ftl_mngt_init_l2p,

			.cleanup = ftl_mngt_deinit_l2p

		},

		{

			.name = "Recover L2P from shared memory",

			.action = ftl_mngt_recovery_shm_l2p,

		},

		{

			.name = "Finalize band initialization",

			.action = ftl_mngt_finalize_init_bands,
@@ -266,6 +288,26 @@ static const struct ftl_mngt_process_desc g_desc_recovery = { 
	}

};



/*

 * Shared memory specific steps for dirty shutdown recovery - main task is rebuilding the state of

 * L2P cache (paged in/out status, dirtiness etc. of individual pages).

 */

static const struct ftl_mngt_process_desc g_desc_recovery_shm = {

	.name = "FTL recovery from SHM",

	.ctx_size = sizeof(struct ftl_mngt_recovery_ctx),

	.steps = {

		{

			.name = "Restore L2P from SHM",

			.action = ftl_mngt_restore_l2p,

		},

		{

			.name = "Restore valid maps counters",

			.action = ftl_mngt_restore_valid_counters,

		},

		{}

	}

};



void

ftl_mngt_recover(struct spdk_ftl_dev *dev, struct ftl_mngt_process *mngt)

{