I was running this while the fs was mounted, which is probably not what
was expected, but here''s a crash report anyway. :)
Simon-
[/usr/src/btrfs-tools/btrfs-tools-0.19+20100601]# gdb --args ./btrfs-debug-tree
/dev/etherd/e14.0
GNU gdb 6.8-debian
Copyright (C) 2008 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later
<http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show
copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu"...
(gdb) r
Starting program:
/usr/src/btrfs-tools/btrfs-tools-0.19+20100601/btrfs-debug-tree
/dev/etherd/e14.0
failed to read /dev/sr0
parent transid verify failed on 20992000 wanted 2666 found 2562
parent transid verify failed on 20992000 wanted 2666 found 2562
parent transid verify failed on 20992000 wanted 2666 found 2562
Program received signal SIGSEGV, Segmentation fault.
0x000000000041d92e in btrfs_header_nritems (eb=0x0) at ctree.h:1416
1416 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems,
32);
(gdb) bt
#0 0x000000000041d92e in btrfs_header_nritems (eb=0x0) at ctree.h:1416
#1 0x0000000000420eb8 in btrfs_read_chunk_tree (root=0x13e5350) at
volumes.c:1408
#2 0x000000000040a65f in open_ctree_fd (fp=3, path=0x7fff769b8795
"/dev/etherd/e14.0", sb_bytenr=65536, writes=0) at disk-io.c:730
#3 0x000000000040a094 in open_ctree (filename=0x7fff769b8795
"/dev/etherd/e14.0", sb_bytenr=0, writes=0) at disk-io.c:587
#4 0x000000000042597d in main (ac=1, av=0x7fff769b7f58) at debug-tree.c:144
(gdb) list
1411 /* struct btrfs_header */
1412 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr,
64);
1413 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1414 generation, 64);
1415 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1416 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems,
32);
1417 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1418 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1419
1420 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
(gdb) up
#1 0x0000000000420eb8 in btrfs_read_chunk_tree (root=0x13e5350) at
volumes.c:1408
1408 if (slot >= btrfs_header_nritems(leaf)) {
(gdb) list
1403 again:
1404 ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
1405 while(1) {
1406 leaf = path->nodes[0];
1407 slot = path->slots[0];
1408 if (slot >= btrfs_header_nritems(leaf)) {
1409 ret = btrfs_next_leaf(root, path);
1410 if (ret == 0)
1411 continue;
1412 if (ret < 0)
(gdb) print slot
$1 = 0
(gdb) print leaf
$2 = (struct extent_buffer *) 0x0
(gdb) print btrfs_header_nritems
$3 = {u32 (struct extent_buffer *)} 0x41d916 <btrfs_header_nritems>
(gdb) set print pretty
(gdb) print *path
$5 = {
nodes = {0x0, 0x13f0040, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0},
slots = {0, 11, 0, 0, 0, 0, 0, 0},
locks = {0, 0, 0, 0, 0, 0, 0, 0},
reada = 0,
lowest_level = 0,
search_for_split = 0,
keep_locks = 0,
skip_locking = 0,
leave_spinning = 0
}
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