Re: mount & fsck of nilfs partition fail.

[Ryusuke Konishi <konishi.ryusuke-Zyj7fXuS5i5L9jVzuh4AOg@public.gmane.org>]

On Fri, 17 Jun 2011 14:55:04 -0700, Zahid Chowdhury wrote:
> Hello Ryusuke,
>  I have attached the output below (let me know if you need anything further - thanks for your help):
> [Thread debugging using libthread_db enabled]
> 0x0090a402 in __kernel_vsyscall ()
> #0  0x0090a402 in __kernel_vsyscall ()
> No symbol table info available.
> #1  0x00267713 in __waitpid_nocancel () from /lib/libc.so.6
> No symbol table info available.
> #2  0x0020c07b in do_system () from /lib/libc.so.6
> No symbol table info available.
> #3  0x08049154 in nilfs_backtrace () at fsck0.nilfs2.c:176
>         cmd = "backtrace 10688 > /var/log/bt_fsck0.nilfs2.10688.out 2>&1\000\000\000\243\213)\000\032\200*\000\024\215#\000\002", '\000' <repeats 12 times>"\360, l\222\002\000\000\000\364\257\062\000\000\000\000"
>         progname = "/sbin\000fsck0.nilfs2", '\000' <repeats 18 times>, "`\000\000\000p\301\062\000\004\000\000\000\346\356#\000\000\000\000\000\230\301\062\000p\000\000\000\377\017\000\000@\000\000\000\300\277\337\bp\301\062\0
> 00\000 \004\000\032\200*\000\000\020\002\000\001\000\000\000\000\000\000"
>         n = <value optimized out>
> #4  0x08049251 in read_block (fd=3, blocknr=2696911, buf=0x8ddb8b0, size=4096)
>     at fsck0.nilfs2.c:204
> No locals.
> #5  0x080492d9 in next_ss_entry (fd=3, blocknrp=0xbfc458b8,
>     offsetp=0xbfc458c4, entry_size=8) at fsck0.nilfs2.c:570
>         p = <value optimized out>
> #6  0x0804994c in get_latest_cno (fd=3, seginfo=0x8dfd8f8, start=0x8dfe410)
>     at fsck0.nilfs2.c:636
> No locals.
> #7  find_latest_cno_in_logical_segment (fd=3, seginfo=0x8dfd8f8,
>     start=0x8dfe410) at fsck0.nilfs2.c:660
>         loginfo = 0x8dfe410
>         cno = 3249616
>         latest_cno = 0
>         seq = <value optimized out>
>         i = 0
> #8  0x0804aafc in nilfs_fsck (argc=2146089, argv=0xbfc4579c)
>     at fsck0.nilfs2.c:1058
> No locals.
> #9  main (argc=2146089, argv=0xbfc4579c) at fsck0.nilfs2.c:1183
> No locals.

Ok, get_latest_cno function seems to have something wrong.

Could you please get some debug information with the following patch ?


Ryusuke Konishi
---
From: Ryusuke Konishi <konishi.ryusuke-Zyj7fXuS5i5L9jVzuh4AOg@public.gmane.org>

fsck0.nilfs2: insert debug messages in get_latest_cno function

---
 sbin/fsck/fsck0.nilfs2.c |   13 +++++++++++++
 1 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/sbin/fsck/fsck0.nilfs2.c b/sbin/fsck/fsck0.nilfs2.c
index 6a41766..7b70911 100644
--- a/sbin/fsck/fsck0.nilfs2.c
+++ b/sbin/fsck/fsck0.nilfs2.c
@@ -592,6 +592,11 @@ static __u64 get_latest_cno(int fd, __u64 log_start)
 	offset = le16_to_cpu(ss->ss_bytes);
 	fblocknr = blocknr + DIV_ROUND_UP(le32_to_cpu(ss->ss_sumbytes),
 					  blocksize);
+	fprintf(stderr, "%s: log_start=%llu (segnum=%lu): nfinfo=%lu, "
+		"fblocknr=%llu\n", __func__,
+		(unsigned long long)log_start,
+		(unsigned long)log_start / blocks_per_segment,
+		(unsigned long)nfinfo, (unsigned long long)fblocknr);
 
 	for (i = 0; i < nfinfo; i++) {
 		finfo = next_ss_entry(fd, &blocknr, &offset, sizeof(*finfo));
@@ -601,6 +606,14 @@ static __u64 get_latest_cno(int fd, __u64 log_start)
 		nnodeblk = nblocks - ndatablk;
 		ino = le64_to_cpu(finfo->fi_ino);
 
+		fprintf(stderr, "%s: finfo: ino=%llu, sum-blocknr=%llu, "
+			"offset=%u, nblocks=%lu, ndatablk=%lu, "
+			"fblocknr=%llu\n", __func__,
+			(unsigned long long)ino,
+			(unsigned long long)blocknr, offset,
+			(unsigned long)nblocks, (unsigned long)ndatablk,
+			(unsigned long long)fblocknr);
+
 		if (ino == NILFS_DAT_INO) {
 			__le64 *blkoff;
 			struct nilfs_binfo_dat *binfo_dat;
-- 
1.7.3.5

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