From be32eb0557f3d797c0ad073e18df633c73a10755 Mon Sep 17 00:00:00 2001 From: Nikolay Borisov Date: Mon, 1 Oct 2018 17:46:19 +0300 Subject: btrfs-progs: check: Add support for freespace tree fixing Now that all the prerequisite code for proper support of free space tree repair is in, it's time to wire it in. This is achieved by first hooking the freespace tree to the __free_extent/alloc_reserved_tree_block functions. And then introducing a wrapper function to contains the existing check_space_cache and the newly introduced repair code. Finally, it's important to note that FST repair code first clears the existing FST in case of any problem found and rebuilds it from scratch. Signed-off-by: Nikolay Borisov Signed-off-by: David Sterba --- check/main.c | 46 +++++++++++++++++++++++++++++----------------- 1 file changed, 29 insertions(+), 17 deletions(-) diff --git a/check/main.c b/check/main.c index f44d5456..79d222d5 100644 --- a/check/main.c +++ b/check/main.c @@ -5400,14 +5400,6 @@ static int check_space_cache(struct btrfs_root *root) int ret; int error = 0; - if (btrfs_super_cache_generation(root->fs_info->super_copy) != -1ULL && - btrfs_super_generation(root->fs_info->super_copy) != - btrfs_super_cache_generation(root->fs_info->super_copy)) { - printf("cache and super generation don't match, space cache " - "will be invalidated\n"); - return 0; - } - while (1) { ctx.item_count++; cache = btrfs_lookup_first_block_group(root->fs_info, start); @@ -9425,7 +9417,6 @@ static int do_clear_free_space_cache(struct btrfs_fs_info *fs_info, ret = 1; goto close_out; } - printf("Clearing free space cache\n"); ret = clear_free_space_cache(fs_info); if (ret) { error("failed to clear free space cache"); @@ -9452,6 +9443,34 @@ close_out: return ret; } +static int validate_free_space_cache(struct btrfs_root *root) +{ + int ret; + + if (btrfs_super_cache_generation(root->fs_info->super_copy) != -1ULL && + btrfs_super_generation(root->fs_info->super_copy) != + btrfs_super_cache_generation(root->fs_info->super_copy)) { + printf( +"cache and super generation don't match, space cache will be invalidated\n"); + return 0; + } + + ret = check_space_cache(root); + if (ret && btrfs_fs_compat_ro(global_info, FREE_SPACE_TREE) && + repair) { + ret = do_clear_free_space_cache(global_info, 2); + if (ret) + goto out; + + ret = btrfs_create_free_space_tree(global_info); + if (ret) + error("couldn't repair freespace tree"); + } + +out: + return ret ? -EINVAL : 0; +} + const char * const cmd_check_usage[] = { "btrfs check [options] ", "Check structural integrity of a filesystem (unmounted).", @@ -9885,16 +9904,9 @@ int cmd_check(int argc, char **argv) task_start(ctx.info, &ctx.start_time, &ctx.item_count); } - ret = check_space_cache(root); + ret = validate_free_space_cache(root); task_stop(ctx.info); err |= !!ret; - if (ret) { - if (is_free_space_tree) - error("errors found in free space tree"); - else - error("errors found in free space cache"); - goto out; - } /* * We used to have to have these hole extents in between our real -- cgit v1.2.3