When testing under libguestfs, btrfs-convert will never succeed to fix
chunk map, and always fails.

But in that case, it's already a mountable btrfs.
So better to info user with different error message for that case.

The root cause of it is still under investigation.

Signed-off-by: Qu Wenruo <[email protected]>
---
 btrfs-convert.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/btrfs-convert.c b/btrfs-convert.c
index 9a9d619..5606156 100644
--- a/btrfs-convert.c
+++ b/btrfs-convert.c
@@ -2286,6 +2286,7 @@ static int do_convert(const char *devname, int datacsum, 
int packing, int noxatt
 {
        int i, ret, blocks_per_node;
        int fd = -1;
+       int is_btrfs = 0;
        u32 blocksize;
        u64 blocks[7];
        u64 total_bytes;
@@ -2435,6 +2436,7 @@ static int do_convert(const char *devname, int datacsum, 
int packing, int noxatt
                fprintf(stderr, "unable to migrate super block\n");
                goto fail;
        }
+       is_btrfs = 1;
 
        root = open_ctree_fd(fd, devname, 0, OPEN_CTREE_WRITES);
        if (!root) {
@@ -2455,7 +2457,11 @@ static int do_convert(const char *devname, int datacsum, 
int packing, int noxatt
 fail:
        if (fd != -1)
                close(fd);
-       fprintf(stderr, "conversion aborted.\n");
+       if (is_btrfs)
+               fprintf(stderr,
+                       "some error happened, but still converted to btrfs\n");
+       else
+               fprintf(stderr, "conversion aborted\n");
        return -1;
 }
 
-- 
2.4.2

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