Re: [Samba] cifs and Netapp DFS-shares problems
On Fri, Dec 10, 2010 at 5:34 AM, Jeff Layton jlay...@samba.org wrote: On Fri, 10 Dec 2010 11:25:46 +0100 Marcus li...@localguru.de wrote: Any ideas? Seems to be an error of the NetApp Fileserver acting not RFC conform. Is this the right list to discuss or should I post on linux-cifs-client list? (cc'ing linux-cifs mailing list) Probably because the ls is hung and is holding references to the mount... I've successfully tested against netapp's CIFS implementation in the past, but there are significant bugs in it. The errors you're seeing look like an alignment problem of some sort -- i.e. the server is sending packets that have incorrect length fields in them. This isn't the first such problem I've seen with OnTap. You're welcome to open a bug at bugzilla.samba.org, cc me, and I'll take a look when I have time. Gathering wire captures during one of these events and attaching them to the bug would help to track down the problem. It's likely to be Netapp's bug however... We have worked around a few similar sounding server bugs in the past, but have to be careful that we don't introduce potential buffer overruns or security problems (the Linux cifs client parses frames more carefully than some other clients to reduce the chance of going beyond the end of frames). -- Thanks, Steve -- To unsubscribe from this list go to the following URL and read the instructions: https://lists.samba.org/mailman/options/samba
Re: [Samba] cifs and Netapp DFS-shares problems
Hi, Am Donnerstag, den 09.12.2010, 01:37 +0100 schrieb Marcus: are there any known issues with cifs and DFS-shares on Netapp file servers? We have a Netapp file sever with DFS on the user's home shares. The home shares can successfully mounted with mount -t cifs //sever/home/username /mnt/ -o user=username,domain=AD but the connection hangs in the moment a directory listing is started. The strange thing is that only shares with activated DFS show this problem. I'm not maintaining the Netapp file server therefore a can't post more information about that system. On client side I'm using Ubuntu LTS 10.04.1. This error only comes up, if DFS is activated on a share on the NetApp Server. Here is a kernel log: Dec 10 11:10:37 lebowski kernel: [ 3586.471662] Bad SMB: : dump of 48 bytes of data at 0xe44e5c00 Dec 10 11:10:37 lebowski kernel: [ 3586.471675] 009a 424d53ff 0032 80018800 . . . . ÿ S M B 2 . . . . . . . Dec 10 11:10:37 lebowski kernel: [ 3586.471688] 26420040 . . . . . . . . . . . . @ . B Dec 10 11:10:37 lebowski kernel: [ 3586.471701] 001a0800 720a 0200 3800 . . . . . . . p . . . . . 8 . . Dec 10 11:11:03 lebowski kernel: [ 3612.832108] CIFS VFS: server not responding Dec 10 11:11:03 lebowski kernel: [ 3612.832125] CIFS VFS: No response for cmd 50 mid 26 Dec 10 11:11:05 lebowski kernel: [ 3614.656937] CIFS VFS: RFC1001 size 154 bigger than SMB for Mid=30 Dec 10 11:11:05 lebowski kernel: [ 3614.656953] Bad SMB: : dump of 48 bytes of data at 0xe44e5c00 Dec 10 11:11:05 lebowski kernel: [ 3614.656967] 009a 424d53ff 0032 80018800 . . . . ÿ S M B 2 . . . . . . . Dec 10 11:11:05 lebowski kernel: [ 3614.656979] 26420040 . . . . . . . . . . . . @ . B Dec 10 11:11:05 lebowski kernel: [ 3614.656994] 001e0800 720a 0200 3800 . . . . . . . p . . . . . 8 . . Dec 10 11:11:33 lebowski kernel: [ 3642.832284] CIFS VFS: server not responding Dec 10 11:11:33 lebowski kernel: [ 3642.832299] CIFS VFS: No response for cmd 50 mid 30 Dec 10 11:11:40 lebowski kernel: [ 3649.895000] CIFS VFS: RFC1001 size 154 bigger than SMB for Mid=34 Dec 10 11:11:40 lebowski kernel: [ 3649.895017] Bad SMB: : dump of 48 bytes of data at 0xe44e5c00 Dec 10 11:11:40 lebowski kernel: [ 3649.895030] 009a 424d53ff 0032 80018800 . . . . ÿ S M B 2 . . . . . . . Dec 10 11:11:40 lebowski kernel: [ 3649.895043] 26420040 . . . . . . . . . . . . @ . B Dec 10 11:11:40 lebowski kernel: [ 3649.895056] 00220800 720a 0200 3800 . . . . . . p . . . . . 8 . . -- umounting is impossible and gives the following error: -- unmount error 16 = Device or resource busy Refer to the umount.cifs(8) manual page (man 8 umount.cifs) unmount error 16 = Device or resource busy Refer to the umount.cifs(8) manual page (man 8 umount.cifs) -- Any ideas? Seems to be an error of the NetApp Fileserver acting not RFC conform. Is this the right list to discuss or should I post on linux-cifs-client list? Ciao, Marcus -- To unsubscribe from this list go to the following URL and read the instructions: https://lists.samba.org/mailman/options/samba
Re: [Samba] cifs and Netapp DFS-shares problems
On Fri, Dec 10, 2010 at 11:25:46AM +0100, Marcus wrote: Am Donnerstag, den 09.12.2010, 01:37 +0100 schrieb Marcus: are there any known issues with cifs and DFS-shares on Netapp file servers? We have a Netapp file sever with DFS on the user's home shares. The home shares can successfully mounted with mount -t cifs //sever/home/username /mnt/ -o user=username,domain=AD but the connection hangs in the moment a directory listing is started. The strange thing is that only shares with activated DFS show this problem. I'm not maintaining the Netapp file server therefore a can't post more information about that system. On client side I'm using Ubuntu LTS 10.04.1. This error only comes up, if DFS is activated on a share on the NetApp Server. Here is a kernel log: cifsfs is not in NetApps supported client matrix. I have had numerous customer issues regarding that combination. The worst one was data corruption of Thunderbird mailboxes stored on NetApp using cifsfs. Don't ever use cifsfs to access data on a NetApp box. This just does not work. Volker -- To unsubscribe from this list go to the following URL and read the instructions: https://lists.samba.org/mailman/options/samba
Re: [Samba] cifs and Netapp DFS-shares problems
On Fri, 10 Dec 2010 11:25:46 +0100 Marcus li...@localguru.de wrote: Hi, Am Donnerstag, den 09.12.2010, 01:37 +0100 schrieb Marcus: are there any known issues with cifs and DFS-shares on Netapp file servers? We have a Netapp file sever with DFS on the user's home shares. The home shares can successfully mounted with mount -t cifs //sever/home/username /mnt/ -o user=username,domain=AD but the connection hangs in the moment a directory listing is started. The strange thing is that only shares with activated DFS show this problem. I'm not maintaining the Netapp file server therefore a can't post more information about that system. On client side I'm using Ubuntu LTS 10.04.1. This error only comes up, if DFS is activated on a share on the NetApp Server. Here is a kernel log: Dec 10 11:10:37 lebowski kernel: [ 3586.471662] Bad SMB: : dump of 48 bytes of data at 0xe44e5c00 Dec 10 11:10:37 lebowski kernel: [ 3586.471675] 009a 424d53ff 0032 80018800 . . . . ÿ S M B 2 . . . . . . . Dec 10 11:10:37 lebowski kernel: [ 3586.471688] 26420040 . . . . . . . . . . . . @ . B Dec 10 11:10:37 lebowski kernel: [ 3586.471701] 001a0800 720a 0200 3800 . . . . . . . p . . . . . 8 . . Dec 10 11:11:03 lebowski kernel: [ 3612.832108] CIFS VFS: server not responding Dec 10 11:11:03 lebowski kernel: [ 3612.832125] CIFS VFS: No response for cmd 50 mid 26 Dec 10 11:11:05 lebowski kernel: [ 3614.656937] CIFS VFS: RFC1001 size 154 bigger than SMB for Mid=30 Dec 10 11:11:05 lebowski kernel: [ 3614.656953] Bad SMB: : dump of 48 bytes of data at 0xe44e5c00 Dec 10 11:11:05 lebowski kernel: [ 3614.656967] 009a 424d53ff 0032 80018800 . . . . ÿ S M B 2 . . . . . . . Dec 10 11:11:05 lebowski kernel: [ 3614.656979] 26420040 . . . . . . . . . . . . @ . B Dec 10 11:11:05 lebowski kernel: [ 3614.656994] 001e0800 720a 0200 3800 . . . . . . . p . . . . . 8 . . Dec 10 11:11:33 lebowski kernel: [ 3642.832284] CIFS VFS: server not responding Dec 10 11:11:33 lebowski kernel: [ 3642.832299] CIFS VFS: No response for cmd 50 mid 30 Dec 10 11:11:40 lebowski kernel: [ 3649.895000] CIFS VFS: RFC1001 size 154 bigger than SMB for Mid=34 Dec 10 11:11:40 lebowski kernel: [ 3649.895017] Bad SMB: : dump of 48 bytes of data at 0xe44e5c00 Dec 10 11:11:40 lebowski kernel: [ 3649.895030] 009a 424d53ff 0032 80018800 . . . . ÿ S M B 2 . . . . . . . Dec 10 11:11:40 lebowski kernel: [ 3649.895043] 26420040 . . . . . . . . . . . . @ . B Dec 10 11:11:40 lebowski kernel: [ 3649.895056] 00220800 720a 0200 3800 . . . . . . p . . . . . 8 . . -- umounting is impossible and gives the following error: -- unmount error 16 = Device or resource busy Refer to the umount.cifs(8) manual page (man 8 umount.cifs) unmount error 16 = Device or resource busy Refer to the umount.cifs(8) manual page (man 8 umount.cifs) -- Any ideas? Seems to be an error of the NetApp Fileserver acting not RFC conform. Is this the right list to discuss or should I post on linux-cifs-client list? (cc'ing linux-cifs mailing list) Probably because the ls is hung and is holding references to the mount... I've successfully tested against netapp's CIFS implementation in the past, but there are significant bugs in it. The errors you're seeing look like an alignment problem of some sort -- i.e. the server is sending packets that have incorrect length fields in them. This isn't the first such problem I've seen with OnTap. You're welcome to open a bug at bugzilla.samba.org, cc me, and I'll take a look when I have time. Gathering wire captures during one of these events and attaching them to the bug would help to track down the problem. It's likely to be Netapp's bug however... -- Jeff Layton jlay...@samba.org -- To unsubscribe from this list go to the following URL and read the instructions: https://lists.samba.org/mailman/options/samba
Re: [Samba] cifs and Netapp DFS-shares problems
On Fri, Dec 10, 2010 at 06:34:49AM -0500, Jeff Layton wrote: You're welcome to open a bug at bugzilla.samba.org, cc me, and I'll take a look when I have time. Gathering wire captures during one of these events and attaching them to the bug would help to track down the problem. It's likely to be Netapp's bug however... NetApp explicitly refuses to fix anything that is outside their supported client matrix. I've heard that from NetApp reps responsible for my customers. cifsfs is outside that matrix. NetApp's fix is to tell people to use NFS when coming from Linux. Volker -- To unsubscribe from this list go to the following URL and read the instructions: https://lists.samba.org/mailman/options/samba
Re: [Samba] cifs and Netapp DFS-shares problems
Hi Jeff, Am Freitag, den 10.12.2010, 06:34 -0500 schrieb Jeff Layton: On Fri, 10 Dec 2010 11:25:46 +0100 Marcus li...@localguru.de wrote: Hi, Am Donnerstag, den 09.12.2010, 01:37 +0100 schrieb Marcus: are there any known issues with cifs and DFS-shares on Netapp file servers? We have a Netapp file sever with DFS on the user's home shares. The home shares can successfully mounted with mount -t cifs //sever/home/username /mnt/ -o user=username,domain=AD but the connection hangs in the moment a directory listing is started. The strange thing is that only shares with activated DFS show this problem. I'm not maintaining the Netapp file server therefore a can't post more information about that system. On client side I'm using Ubuntu LTS 10.04.1. This error only comes up, if DFS is activated on a share on the NetApp Server. Here is a kernel log: Dec 10 11:10:37 lebowski kernel: [ 3586.471662] Bad SMB: : dump of 48 bytes of data at 0xe44e5c00 Dec 10 11:10:37 lebowski kernel: [ 3586.471675] 009a 424d53ff 0032 80018800 . . . . ÿ S M B 2 . . . . . . . Dec 10 11:10:37 lebowski kernel: [ 3586.471688] 26420040 . . . . . . . . . . . . @ . B Dec 10 11:10:37 lebowski kernel: [ 3586.471701] 001a0800 720a 0200 3800 . . . . . . . p . . . . . 8 . . Dec 10 11:11:03 lebowski kernel: [ 3612.832108] CIFS VFS: server not responding Dec 10 11:11:03 lebowski kernel: [ 3612.832125] CIFS VFS: No response for cmd 50 mid 26 Dec 10 11:11:05 lebowski kernel: [ 3614.656937] CIFS VFS: RFC1001 size 154 bigger than SMB for Mid=30 Dec 10 11:11:05 lebowski kernel: [ 3614.656953] Bad SMB: : dump of 48 bytes of data at 0xe44e5c00 Dec 10 11:11:05 lebowski kernel: [ 3614.656967] 009a 424d53ff 0032 80018800 . . . . ÿ S M B 2 . . . . . . . Dec 10 11:11:05 lebowski kernel: [ 3614.656979] 26420040 . . . . . . . . . . . . @ . B Dec 10 11:11:05 lebowski kernel: [ 3614.656994] 001e0800 720a 0200 3800 . . . . . . . p . . . . . 8 . . Dec 10 11:11:33 lebowski kernel: [ 3642.832284] CIFS VFS: server not responding Dec 10 11:11:33 lebowski kernel: [ 3642.832299] CIFS VFS: No response for cmd 50 mid 30 Dec 10 11:11:40 lebowski kernel: [ 3649.895000] CIFS VFS: RFC1001 size 154 bigger than SMB for Mid=34 Dec 10 11:11:40 lebowski kernel: [ 3649.895017] Bad SMB: : dump of 48 bytes of data at 0xe44e5c00 Dec 10 11:11:40 lebowski kernel: [ 3649.895030] 009a 424d53ff 0032 80018800 . . . . ÿ S M B 2 . . . . . . . Dec 10 11:11:40 lebowski kernel: [ 3649.895043] 26420040 . . . . . . . . . . . . @ . B Dec 10 11:11:40 lebowski kernel: [ 3649.895056] 00220800 720a 0200 3800 . . . . . . p . . . . . 8 . . -- umounting is impossible and gives the following error: -- unmount error 16 = Device or resource busy Refer to the umount.cifs(8) manual page (man 8 umount.cifs) unmount error 16 = Device or resource busy Refer to the umount.cifs(8) manual page (man 8 umount.cifs) -- Any ideas? Seems to be an error of the NetApp Fileserver acting not RFC conform. Is this the right list to discuss or should I post on linux-cifs-client list? (cc'ing linux-cifs mailing list) Probably because the ls is hung and is holding references to the mount... I've successfully tested against netapp's CIFS implementation in the past, but there are significant bugs in it. The errors you're seeing look like an alignment problem of some sort -- i.e. the server is sending packets that have incorrect length fields in them. This isn't the first such problem I've seen with OnTap. You're welcome to open a bug at bugzilla.samba.org, cc me, and I'll take a look when I have time. Gathering wire captures during one of these events and attaching them to the bug would help to track down the problem. It's likely to be Netapp's bug however... Thanks for helping. I've posted a bug [1] with a tcpdump. Have a nice weekend, Marcus [1] https://bugzilla.samba.org/show_bug.cgi?id=7860 -- To unsubscribe from this list go to the following URL and read the instructions: https://lists.samba.org/mailman/options/samba
[Samba] cifs and Netapp DFS-shares problems
Hi, are there any known issues with cifs and DFS-shares on Netapp file servers? We have a Netapp file sever with DFS on the user's home shares. The home shares can successfully mounted with mount -t cifs //sever/home/username /mnt/ -o user=username,domain=AD but the connection hangs in the moment a directory listing is started. The strange thing is that only shares with activated DFS show this problem. I'm not maintaining the Netapp file server therefore a can't post more information about that system. On client side I'm using Ubuntu LTS 10.04.1. Ciao, Marcus -- To unsubscribe from this list go to the following URL and read the instructions: https://lists.samba.org/mailman/options/samba
