[sheepdog] [PATCH v8 06/10] sheep: add traverse_btree() to list and check vdi

[MORITA Kazutaka]

At Wed, 20 Nov 2013 14:04:43 +0800,
Robin Dong wrote:
> 
> +
> +/* dump the information of B-tree */
> +static void dump_btree(read_node_fn reader, struct sd_inode *inode)
> +{
> +#ifdef DEBUG
> +	sd_info("btree> BEGIN");
> +	traverse_btree(reader, inode, dump_cb, NULL);
> +	sd_info("btree> END");
>  #endif
>  }

Seems that this function causes a segfault with our functional tests.
Do you have any ideas why this happens?

==
$ sudo ./check 16
PLATFORM      -- Linux/x86_64 hanna 3.10.11

016 Last Used:21s.  Test vdi clone functionality - output mismatch (see 016.out.bad)
--- 016.out     2014-01-20 11:54:55.000000000 +0900
+++ 016.out.bad 2014-01-20 12:06:51.000000000 +0900
@@ -1,12 +1,27 @@
 QA output created by 016
 using backend plain store
+btree> BEGIN
+btree> HEAD: magic 49784 entries 0 depth 84
+PANIC: This B-tree not support depth 84
+dog exits unexpectedly (Aborted).
+dog.c:351: crash_handler
+/lib/x86_64-linux-gnu/libpthread.so.0(+0xf02f) [0x7f33aa85902f]
+/lib/x86_64-linux-gnu/libc.so.6(gsignal+0x34) [0x7f33aa2e8474]
+/lib/x86_64-linux-gnu/libc.so.6(abort+0x17f) [0x7f33aa2eb6ef]
+sd_inode.c:180: traverse_btree
+sd_inode.c:213: dump_btree
+sd_inode.c:617: sd_inode_set_vid
+vdi.c:639: vdi_create
+dog.c:519: main
+/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xfc) [0x7f33aa2d4eac]
+../../dog/dog() [0x403708]
 there should be no vdi
   Name        Id    Size    Used  Shared    Creation time   VDI id  Copies  Tag
 there should be no object
 STORE  DATA    VDI     VMSTATE ATTR    STALE
-0      0       3       0       0       0
-1      0       3       0       0       0
-2      0       3       0       0       0
-3      0       3       0       0       0
-4      0       3       0       0       0
-5      0       3       0       0       0
+0      1       3       0       0       0
+1      1       3       0       0       0
+2      1       3       0       0       0
+3      1       3       0       0       0
+4      1       3       0       0       0
+5      1       3       0       0       0
Failures: 016
Failed 1 of 1 tests