CIFS mount is offline every x minutes/seconds

[Jean-Louis Dupond]

Binary package hint: samba

Situation:

Mounting a LOCAL Win XP PC share with:
mount //LOCAL-NETWORK-PC/DATA /mnt/DATA

Then we start playing music from /mnt/DATA, everything runs fine, only every x minutes/seconds it seems to give a skip.

Pulseaudio tells me:
D: protocol-native.c: Underrun on 'Music File', 0 bytes in queue.
D: protocol-native.c: Requesting rewind due to end of underrun.

Lets enable CIFS debugging:
echo 3 > /proc/fs/cifs/cifsFYI

Then at every underrun it gives:
[48601.045432] /build/buildd/linux-2.6.31/fs/cifs/file.c: CIFS VFS: in cifs_read as Xid: 722374 with uid: 1000
[48601.045434] /build/buildd/linux-2.6.31/fs/cifs/cifssmb.c: Reading 2048 bytes on fid 49163
[48601.045437] /build/buildd/linux-2.6.31/fs/cifs/transport.c: For smb_command 46
[48601.045439] /build/buildd/linux-2.6.31/fs/cifs/transport.c: Sending smb: total_len 63
[48601.045902] /build/buildd/linux-2.6.31/fs/cifs/connect.c: rfc1002 length 0x840
[48601.045971] /build/buildd/linux-2.6.31/fs/cifs/cifssmb.c: Reading 2048 bytes on fid 49163
[48601.045983] /build/buildd/linux-2.6.31/fs/cifs/transport.c: For smb_command 46
[48601.045985] /build/buildd/linux-2.6.31/fs/cifs/transport.c: Sending smb: total_len 63
[48601.046598] /build/buildd/linux-2.6.31/fs/cifs/connect.c: rfc1002 length 0x840
[48601.046670] /build/buildd/linux-2.6.31/fs/cifs/file.c: CIFS VFS: leaving cifs_read (xid = 722374) rc = 0
[48601.046681] /build/buildd/linux-2.6.31/fs/cifs/file.c: Bytes read 4096
[48601.046684] /build/buildd/linux-2.6.31/fs/cifs/file.c: CIFS VFS: leaving cifs_readpage (xid = 722373) rc = 0
[48601.046718] /build/buildd/linux-2.6.31/fs/cifs/file.c: CIFS VFS: in cifs_readpages as Xid: 722375 with uid: 1000
[48601.046721] /build/buildd/linux-2.6.31/fs/cifs/cifssmb.c: Reading 0 bytes on fid 49163
[48601.046724] /build/buildd/linux-2.6.31/fs/cifs/transport.c: For smb_command 46
[48601.046726] /build/buildd/linux-2.6.31/fs/cifs/transport.c: Sending smb: total_len 63
[48601.047140] /build/buildd/linux-2.6.31/fs/cifs/connect.c: rfc1002 length 0x3f
[48601.047148] /build/buildd/linux-2.6.31/fs/cifs/misc.c: Null buffer passed to cifs_small_buf_release
[48601.047151] /build/buildd/linux-2.6.31/fs/cifs/file.c: No bytes read (0) at offset 65519616 . Cleaning remaining pages from readahead list
[48601.047154] /build/buildd/linux-2.6.31/fs/cifs/file.c: CIFS VFS: leaving cifs_readpages (xid = 722375) rc = 0
[48601.047166] /build/buildd/linux-2.6.31/fs/cifs/file.c: CIFS VFS: in cifs_readpage as Xid: 722376 with uid: 1000
[48601.047169] /build/buildd/linux-2.6.31/fs/cifs/file.c: readpage ffffea000029f8c8 at offset 65519616 0x3e7c000

Full output in attachment

[Jean-Louis Dupond (dupondje)]

dmesg output

[Jean-Louis Dupond (dupondje)]

wireshark dump of the same hickup as the previous dmesg output.

As I can see it looks like its receiving 0byte packages from the samba server (Windows XP PC).

[Jean-Louis Dupond (dupondje)]

Using Ubuntu Karmic with proposed updates.

So kernel -18

[Jean-Louis Dupond (dupondje)]

This seems to be more a bug in the cifs implementation on Windows then a bug in CIFS kernel module.

If I have a cifs/samba share on Linux mounted on my computer, I don't have those skips.
It only skips when I have a Windows share mounted.

[Jean-Louis Dupond (dupondje)]

Somehow its working without problems now :) Bug can be closed