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Daniel Carosone wrote:
> In all this time, fsck says the filesystem is clean (even after
> -f). But there are a different set of files giving this error.
> 
> It looks like the problem is in the kernel reading the fs, more
> likely than in fsck, to me.

I encountered this problem today for one file, and did some digging.

This EBADF appears to be coming from vn_stat(), where file's vnode
v_type appears to not be one of 'valid' types. Both stat(2)
and fstat(2) consistently return EBADF and this is the only
place where I can see EBADF could end up returned.

According to directory contents, 'my' file used inode #196.  The
directory entry was apparently correct, including correct file type
(DT_REG).  I'm attaching the directory dump (cat /) to this mail,
it's file /.profile.

It was possible to open the file for reading. Attempt to read file
contents froze the machine (was in X, had to use power switch).

After reboot, there was a situation where fsck found an
UNALLOCATED inodes and dropped to singleuser, but  apparently
singleuser shell read /.profile, and hit the 'ffs_read: type 0' DIAGNOSTIC
check in ufs_readwrite.c. Very likely, this DIAGNOSTIC check
was the cause of the previous 'freeze' too.
After booting from rescue floppy (thanks Luke!), bunch of
inodes in range ~ #192-#250 ended up unallocated, otherwise
no problem. This was very likely caused by the hard reboot.

So, at this moment it appears that _some_ vnodes for _some_
files on FFS may end up with zero v_type. How this could happen,
I have no idea. I tried to create bunch of files in root to check
if inode #196 was somehow magic, but there was no problem
altogether with the newly created file with ino#196.

Weird.

Jaromir
-- 
Jaromir Dolecek <jdolecek@NetBSD.org>            http://www.NetBSD.org/
-=- We should be mindful of the potential goal, but as the tantric    -=-
-=- Buddhist masters say, ``You may notice during meditation that you -=-
-=- sometimes levitate or glow.   Do not let this distract you.''     -=-

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