[PATCH 1/2] btrfs-progs: Reduce error level from error to warning for OPEN_CTREE_PARTIAL

[Qu Wenruo <wqu@suse.com>]

Even if we're using OPEN_CTREE_PARTIAL, like "rescue zero log", the
error message still looks too serious even we skipped that tree:

    bad tree block 2172747776, bytenr mismatch, want=2172747776, have=0
    Couldn't setup extent tree
    ^^^^^^^^^^^^^^^^^^^^^^^^^^

This patch will change the error message to:
- Use error() if we're not using OPEN_CTREE_PARTIAL
- Use warning() and explicitly show we're skipping that tree

So the result would be something like:

  For non-OPEN_CTREE_PARTIAL case:
    bad tree block 2172747776, bytenr mismatch, want=2172747776, have=0
    ERROR: could not setup extent tree

  For OPEN_CTREE_PARTIAL case
    bad tree block 2172747776, bytenr mismatch, want=2172747776, have=0
    WARNING: could not setup extent tree, skipping it

Signed-off-by: Qu Wenruo <wqu@suse.com>
---
 disk-io.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/disk-io.c b/disk-io.c
index 42f0026a6d2f..bdf63eee9bd9 100644
--- a/disk-io.c
+++ b/disk-io.c
@@ -886,9 +886,11 @@ static int setup_root_or_create_block(struct btrfs_fs_info *fs_info,
 
 	ret = find_and_setup_root(root, fs_info, objectid, info_root);
 	if (ret) {
-		printk("Couldn't setup %s tree\n", str);
-		if (!(flags & OPEN_CTREE_PARTIAL))
+		if (!(flags & OPEN_CTREE_PARTIAL)) {
+			error("could not setup %s tree", str);
 			return -EIO;
+		}
+		warning("could not setup %s tree, skipping it", str);
 		/*
 		 * Need a blank node here just so we don't screw up in the
 		 * million of places that assume a root has a valid ->node
-- 
2.24.0