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btrfs: Introduce fs_info to extent_io_tree

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This patch will add a new member fs_info to extent_io_tree.

This provides the basis for later trace events to distinguish the output
between different btrfs filesystems. While this increases the size of
the structure, we want to know the source of the trace events and
passing the fs_info as an argument to all contexts is not possible.

The selftests are now allowed to set it to NULL as they don't use the
tracepoints.

Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Qu Wenruo
2019-03-01 10:47:58 +08:00
committed by David Sterba
parent 3b1da515c6
commit c258d6e364
8 changed files with 20 additions and 17 deletions
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5
fs/btrfs/extent_io.c
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@@ -232,9 +232,10 @@ void __cold extent_io_exit(void)
bioset_exit(&btrfs_bioset);
}
void extent_io_tree_init(struct extent_io_tree *tree,
void *private_data)
void extent_io_tree_init(struct btrfs_fs_info *fs_info,
struct extent_io_tree *tree, void *private_data)
{
tree->fs_info = fs_info;
tree->state = RB_ROOT;
tree->ops = NULL;
tree->dirty_bytes = 0;