Commit 3ece54e5 authored by Qu Wenruo's avatar Qu Wenruo Committed by David Sterba

btrfs: Output ENOSPC debug info in inc_block_group_ro

Since inc_block_group_ro() would return -ENOSPC, outputting debug info
for enospc_debug mount option would be helpful to debug some balance
false ENOSPC report.
Signed-off-by: default avatarQu Wenruo <wqu@suse.com>
Reviewed-by: default avatarDavid Sterba <dsterba@suse.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent c8f72b98
...@@ -9605,6 +9605,7 @@ static int inc_block_group_ro(struct btrfs_block_group_cache *cache, int force) ...@@ -9605,6 +9605,7 @@ static int inc_block_group_ro(struct btrfs_block_group_cache *cache, int force)
{ {
struct btrfs_space_info *sinfo = cache->space_info; struct btrfs_space_info *sinfo = cache->space_info;
u64 num_bytes; u64 num_bytes;
u64 sinfo_used;
u64 min_allocable_bytes; u64 min_allocable_bytes;
int ret = -ENOSPC; int ret = -ENOSPC;
...@@ -9631,9 +9632,10 @@ static int inc_block_group_ro(struct btrfs_block_group_cache *cache, int force) ...@@ -9631,9 +9632,10 @@ static int inc_block_group_ro(struct btrfs_block_group_cache *cache, int force)
num_bytes = cache->key.offset - cache->reserved - cache->pinned - num_bytes = cache->key.offset - cache->reserved - cache->pinned -
cache->bytes_super - btrfs_block_group_used(&cache->item); cache->bytes_super - btrfs_block_group_used(&cache->item);
sinfo_used = btrfs_space_info_used(sinfo, true);
if (btrfs_space_info_used(sinfo, true) + num_bytes + if (sinfo_used + num_bytes + min_allocable_bytes <=
min_allocable_bytes <= sinfo->total_bytes) { sinfo->total_bytes) {
sinfo->bytes_readonly += num_bytes; sinfo->bytes_readonly += num_bytes;
cache->ro++; cache->ro++;
list_add_tail(&cache->ro_list, &sinfo->ro_bgs); list_add_tail(&cache->ro_list, &sinfo->ro_bgs);
...@@ -9642,6 +9644,15 @@ static int inc_block_group_ro(struct btrfs_block_group_cache *cache, int force) ...@@ -9642,6 +9644,15 @@ static int inc_block_group_ro(struct btrfs_block_group_cache *cache, int force)
out: out:
spin_unlock(&cache->lock); spin_unlock(&cache->lock);
spin_unlock(&sinfo->lock); spin_unlock(&sinfo->lock);
if (ret == -ENOSPC && btrfs_test_opt(cache->fs_info, ENOSPC_DEBUG)) {
btrfs_info(cache->fs_info,
"unable to make block group %llu ro",
cache->key.objectid);
btrfs_info(cache->fs_info,
"sinfo_used=%llu bg_num_bytes=%llu min_allocable=%llu",
sinfo_used, num_bytes, min_allocable_bytes);
dump_space_info(cache->fs_info, cache->space_info, 0, 0);
}
return ret; return ret;
} }
......
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