[PATCH] Btrfs-progs: receive, add debug information to write and clone commands

[fdmanana@kernel.org]

From: Filipe Manana <fdmanana@suse.com>

Currently, when operating in a more verbose mode (-vv), the receive command
does not mention any write or clone commands, unlike other commands.

This change adds debug messages for the write and clone operations, that do
not include data but only offsets and lengths, as this is actually very
useful to debug a send stream and I use it frequently.

Signed-off-by: Filipe Manana <fdmanana@suse.com>
---
 cmds-receive.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/cmds-receive.c b/cmds-receive.c
index 3888149a..5d06f286 100644
--- a/cmds-receive.c
+++ b/cmds-receive.c
@@ -704,6 +704,10 @@ static int process_write(const char *path, const void *data, u64 offset,
 	if (ret < 0)
 		goto out;
 
+	if (g_verbose >= 2)
+		fprintf(stderr, "write %s - offset=%llu length=%llu\n",
+			path, offset, len);
+
 	while (pos < len) {
 		w = pwrite(rctx->write_fd, (char*)data + pos, len - pos,
 				offset + pos);
@@ -808,6 +812,11 @@ static int process_clone(const char *path, u64 offset, u64 len,
 		goto out;
 	}
 
+	if (g_verbose >= 2)
+		fprintf(stderr,
+			"clone %s - source=%s source offset=%llu offset=%llu length=%llu\n",
+			path, clone_path, clone_offset, offset, len);
+
 	clone_args.src_fd = clone_fd;
 	clone_args.src_offset = clone_offset;
 	clone_args.src_length = len;
-- 
2.11.0