From e50b122b832bed9f36d459f19fd73d00658f5c1e Mon Sep 17 00:00:00 2001 From: Filipe Manana Date: Wed, 26 Jul 2023 16:57:01 +0100 Subject: [PATCH] btrfs: print available space for a block group when dumping a space info When dumping a space info, we iterate over all its block groups and then print their size and the amounts of bytes used, reserved, pinned, etc. When debugging -ENOSPC problems it's also useful to know how much space is available (free), so calculate that and print it as well. Signed-off-by: Filipe Manana Signed-off-by: David Sterba --- fs/btrfs/space-info.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/fs/btrfs/space-info.c b/fs/btrfs/space-info.c index ae12a8a9cd12..54d78e839c01 100644 --- a/fs/btrfs/space-info.c +++ b/fs/btrfs/space-info.c @@ -523,13 +523,18 @@ void btrfs_dump_space_info(struct btrfs_fs_info *fs_info, down_read(&info->groups_sem); again: list_for_each_entry(cache, &info->block_groups[index], list) { + u64 avail; + spin_lock(&cache->lock); + avail = cache->length - cache->used - cache->pinned - + cache->reserved - cache->delalloc_bytes - + cache->bytes_super - cache->zone_unusable; btrfs_info(fs_info, -"block group %llu has %llu bytes, %llu used %llu pinned %llu reserved %llu delalloc %llu super %llu zone_unusable %s", +"block group %llu has %llu bytes, %llu used %llu pinned %llu reserved %llu delalloc %llu super %llu zone_unusable (%llu bytes available) %s", cache->start, cache->length, cache->used, cache->pinned, cache->reserved, cache->delalloc_bytes, cache->bytes_super, cache->zone_unusable, - cache->ro ? "[readonly]" : ""); + avail, cache->ro ? "[readonly]" : ""); spin_unlock(&cache->lock); btrfs_dump_free_space(cache, bytes); } -- 2.11.0