From 64ab346a360a4b15c28fb8531918d4a01f4eabd9 Mon Sep 17 00:00:00 2001 From: Heinz Mauelshagen Date: Thu, 27 Mar 2014 15:14:10 -0400 Subject: dm cache: remove remainder of distinct discard block size Discard block size not being equal to cache block size causes data corruption by erroneously avoiding migrations in issue_copy() because the discard state is being cleared for a group of cache blocks when it should not. Completely remove all code that enabled a distinction between the cache block size and discard block size. Signed-off-by: Heinz Mauelshagen Signed-off-by: Mike Snitzer --- drivers/md/dm-cache-metadata.c | 34 +++++++++++++++++----------------- 1 file changed, 17 insertions(+), 17 deletions(-) (limited to 'drivers/md/dm-cache-metadata.c') diff --git a/drivers/md/dm-cache-metadata.c b/drivers/md/dm-cache-metadata.c index 9ef0752e8a08..cbd568a3a579 100644 --- a/drivers/md/dm-cache-metadata.c +++ b/drivers/md/dm-cache-metadata.c @@ -109,7 +109,7 @@ struct dm_cache_metadata { dm_block_t discard_root; sector_t discard_block_size; - dm_dblock_t discard_nr_blocks; + dm_oblock_t discard_nr_blocks; sector_t data_block_size; dm_cblock_t cache_blocks; @@ -302,7 +302,7 @@ static int __write_initial_superblock(struct dm_cache_metadata *cmd) disk_super->hint_root = cpu_to_le64(cmd->hint_root); disk_super->discard_root = cpu_to_le64(cmd->discard_root); disk_super->discard_block_size = cpu_to_le64(cmd->discard_block_size); - disk_super->discard_nr_blocks = cpu_to_le64(from_dblock(cmd->discard_nr_blocks)); + disk_super->discard_nr_blocks = cpu_to_le64(from_oblock(cmd->discard_nr_blocks)); disk_super->metadata_block_size = cpu_to_le32(DM_CACHE_METADATA_BLOCK_SIZE >> SECTOR_SHIFT); disk_super->data_block_size = cpu_to_le32(cmd->data_block_size); disk_super->cache_blocks = cpu_to_le32(0); @@ -496,7 +496,7 @@ static void read_superblock_fields(struct dm_cache_metadata *cmd, cmd->hint_root = le64_to_cpu(disk_super->hint_root); cmd->discard_root = le64_to_cpu(disk_super->discard_root); cmd->discard_block_size = le64_to_cpu(disk_super->discard_block_size); - cmd->discard_nr_blocks = to_dblock(le64_to_cpu(disk_super->discard_nr_blocks)); + cmd->discard_nr_blocks = to_oblock(le64_to_cpu(disk_super->discard_nr_blocks)); cmd->data_block_size = le32_to_cpu(disk_super->data_block_size); cmd->cache_blocks = to_cblock(le32_to_cpu(disk_super->cache_blocks)); strncpy(cmd->policy_name, disk_super->policy_name, sizeof(cmd->policy_name)); @@ -594,7 +594,7 @@ static int __commit_transaction(struct dm_cache_metadata *cmd, disk_super->hint_root = cpu_to_le64(cmd->hint_root); disk_super->discard_root = cpu_to_le64(cmd->discard_root); disk_super->discard_block_size = cpu_to_le64(cmd->discard_block_size); - disk_super->discard_nr_blocks = cpu_to_le64(from_dblock(cmd->discard_nr_blocks)); + disk_super->discard_nr_blocks = cpu_to_le64(from_oblock(cmd->discard_nr_blocks)); disk_super->cache_blocks = cpu_to_le32(from_cblock(cmd->cache_blocks)); strncpy(disk_super->policy_name, cmd->policy_name, sizeof(disk_super->policy_name)); disk_super->policy_version[0] = cpu_to_le32(cmd->policy_version[0]); @@ -771,15 +771,15 @@ out: int dm_cache_discard_bitset_resize(struct dm_cache_metadata *cmd, sector_t discard_block_size, - dm_dblock_t new_nr_entries) + dm_oblock_t new_nr_entries) { int r; down_write(&cmd->root_lock); r = dm_bitset_resize(&cmd->discard_info, cmd->discard_root, - from_dblock(cmd->discard_nr_blocks), - from_dblock(new_nr_entries), + from_oblock(cmd->discard_nr_blocks), + from_oblock(new_nr_entries), false, &cmd->discard_root); if (!r) { cmd->discard_block_size = discard_block_size; @@ -792,28 +792,28 @@ int dm_cache_discard_bitset_resize(struct dm_cache_metadata *cmd, return r; } -static int __set_discard(struct dm_cache_metadata *cmd, dm_dblock_t b) +static int __set_discard(struct dm_cache_metadata *cmd, dm_oblock_t b) { return dm_bitset_set_bit(&cmd->discard_info, cmd->discard_root, - from_dblock(b), &cmd->discard_root); + from_oblock(b), &cmd->discard_root); } -static int __clear_discard(struct dm_cache_metadata *cmd, dm_dblock_t b) +static int __clear_discard(struct dm_cache_metadata *cmd, dm_oblock_t b) { return dm_bitset_clear_bit(&cmd->discard_info, cmd->discard_root, - from_dblock(b), &cmd->discard_root); + from_oblock(b), &cmd->discard_root); } -static int __is_discarded(struct dm_cache_metadata *cmd, dm_dblock_t b, +static int __is_discarded(struct dm_cache_metadata *cmd, dm_oblock_t b, bool *is_discarded) { return dm_bitset_test_bit(&cmd->discard_info, cmd->discard_root, - from_dblock(b), &cmd->discard_root, + from_oblock(b), &cmd->discard_root, is_discarded); } static int __discard(struct dm_cache_metadata *cmd, - dm_dblock_t dblock, bool discard) + dm_oblock_t dblock, bool discard) { int r; @@ -826,7 +826,7 @@ static int __discard(struct dm_cache_metadata *cmd, } int dm_cache_set_discard(struct dm_cache_metadata *cmd, - dm_dblock_t dblock, bool discard) + dm_oblock_t dblock, bool discard) { int r; @@ -844,8 +844,8 @@ static int __load_discards(struct dm_cache_metadata *cmd, dm_block_t b; bool discard; - for (b = 0; b < from_dblock(cmd->discard_nr_blocks); b++) { - dm_dblock_t dblock = to_dblock(b); + for (b = 0; b < from_oblock(cmd->discard_nr_blocks); b++) { + dm_oblock_t dblock = to_oblock(b); if (cmd->clean_when_opened) { r = __is_discarded(cmd, dblock, &discard); -- cgit