Messages in this thread | | | Date | Sat, 31 Dec 2011 14:49:39 +0200 | From | Konstantinos Skarlatos <> | Subject | Re: cifs: ls of mount point gives input/output error (probably related to CIFS: getdents() broken for large dirs) |
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On Σάββατο, 31 Δεκέμβριος 2011 1:59:22 μμ, Jeff Layton wrote: > On Fri, 30 Dec 2011 20:00:46 +0200 > Konstantinos Skarlatos<k.skarlatos@gmail.com> wrote: > >> On 30/12/2011 3:11 μμ, Jeff Layton wrote: >>> On Fri, 30 Dec 2011 11:04:59 +0200 >>> Konstantinos Skarlatos<k.skarlatos@gmail.com> wrote: >>> >>>> On 29/12/2011 3:54 μμ, Konstantinos Skarlatos wrote: >>>>> On Πέμπτη, 29 Δεκέμβριος 2011 3:39:30 μμ, Jeff Layton wrote: >>>>>> On Thu, 29 Dec 2011 12:30:18 +0200 >>>>>> Konstantinos Skarlatos<k.skarlatos@gmail.com> wrote: >>>>>> >>>>>>> On 29/12/2011 4:04 πμ, Jeff Layton wrote: >>>>>>>> On Thu, 29 Dec 2011 02:08:57 +0200 >>>>>>>> Konstantinos Skarlatos<k.skarlatos@gmail.com> wrote: >>>>>>>> >>>>>>>>> I mount via cifs a windows XP share, df gives me correct sizes, >>>>>>>>> but when >>>>>>>>> I ls the mount point i get input/output error. >>>>>>>>> strace: http://pastebin.com/WXf8M1nu >>>>>>>>> >>>>>>>>> mount --verbose -t cifs -o username=administrator,password=blahblah >>>>>>>>> //192.168.0.11/jobs /mnt/backups/montaz/jobs >>>>>>>>> mount.cifs kernel mount options: >>>>>>>>> ip=192.168.0.11,unc=\\192.168.0.11\jobs,,ver=1,user=administrator,pass=******** >>>>>>>>> >>>>>>>>> >>>>>>>>> df >>>>>>>>> //192.168.0.11/jobs 114464 >>>>>>>>> 105196 9268 92% /mnt/backups/montaz/jobs >>>>>>>>> >>>>>>>>> ls /mnt/backups/montaz/jobs/ >>>>>>>>> ls: reading directory /mnt/backups/montaz/jobs/: Input/output error >>>>>>>>> total 0 >>>>>>>>> >>>>>>>>> the fun thing is that i can cd to a lower level directory, and ls >>>>>>>>> works >>>>>>>>> fine there! only the mount point has the problem >>>>>>>>> >>>>>>>>> ls /mnt/backups/montaz/jobs/test >>>>>>>>> total 44K >>>>>>>>> drwxr-xr-x 1 root root 0 Apr 30 2010 blah blah/ >>>>>>>>> ...... >>>>>>>>> >>>>>>>>> kernel version 3.2rc7 >>>>>>>>> >>>>>>>>> this seems to be related to : >>>>>>>>> https://lkml.org/lkml/2011/8/1/427 >>>>>>>>> Re: [3.0.0+][Regression][Bisected] CIFS: getdents() broken for >>>>>>>>> large dirs >>>>>>>>> >>>>>>>> Hmmm, maybe. What makes you think that it's related? What sort of >>>>>>>> server are you seeing this against? >>>>>>> Windows XP service pack 2 (greek) >>>>>> >>>>>> How many files are in the directory? >>>>>> >>>>> 140 folders and 20 files >>>>> >>>> Attached is a tcp dump of my session. >>> I tried reproducing this here, but wasn't able to. Testing against my >>> xp box worked fine. >>> >>> Most likely, the FIND_FILE responses are falling afoul of the code in >>> coalesce_t2 or check2ndT2. Unfortunately that code is pretty >>> complicated and I'm not certain what the problem actually is... >>> >>> One thing that's interesting is that the total data being sent in the >>> request is rather large (16336 bytes). I think that's legit, but maybe >>> it's exceeding the end of the buffer once we try to coalesce it. >>> >>> Would it be possible to get the cFYI output from this test? >> I did not get a cFYI output from that test, but i redid a >> mount-ls-umount and am attaching the tcpdump >> Also here http://pastebin.com/J20uC6kU you can find the cifsFYI and the >> contents of /proc/fs/cifs/DebugData form the same test >>> >>> Is this a regression? Did it work with earlier kernels and only >>> recently start failing? >>> >> I do not know, and i am a bit afraid to downgrade this machine below 3.0 >> due to some changes arch linux has introduced recently. I can always set >> up a few virtual machines though, and i can even request permission from >> my company to give you shell access if you like. Which kernel versions >> would you like me to test? > > > Ok, that tells us a little: > > -------------------[snip]--------------------- > [96268.787078] fs/cifs/cifssmb.c: In FindFirst for > [96268.787083] fs/cifs/transport.c: For smb_command 50 > [96268.787086] fs/cifs/transport.c: Sending smb: total_len 88 > > ...FIND_FIRST command is sent > > [96268.787690] fs/cifs/connect.c: RFC1002 header 0x1104 > [96268.787697] fs/cifs/connect.c: missing 12048 bytes from transact2, check next response > [96268.787865] fs/cifs/connect.c: RFC1002 header 0x1104 > [96268.787870] fs/cifs/connect.c: missing 12036 bytes from transact2, check next response > [96268.788037] fs/cifs/connect.c: RFC1002 header 0x1104 > [96268.788042] fs/cifs/connect.c: missing 12036 bytes from transact2, check next response > [96268.788371] fs/cifs/connect.c: RFC1002 header 0xdb0 > [96268.788375] fs/cifs/connect.c: missing 12888 bytes from transact2, check next response > > ...all four parts of the response are collected here > > [96268.788391] fs/cifs/transport.c: cifs_sync_mid_result: cmd=50 mid=12 state=16 > > ...but the state at this point is MID_RESPONSE_MALFORMED > > [96268.788395] fs/cifs/cifssmb.c: Error in FindFirst = -5 > [96268.788397] fs/cifs/readdir.c: initiate cifs search rc -5 > [96268.788398] fs/cifs/readdir.c: CIFS VFS: leaving cifs_readdir (xid = 737644) rc = -5 > > ...which makes readdir return -EIO > > -------------------[snip]--------------------- > > Based on that, it looks like something in one of these frames caused > coalesce_t2() to return an error. I don't see the problem right offhand > in the capture, but T2 response handling is pretty complex so it can be > hard to see. > > Would it be possible for you to rebuild your kernel (or just cifs.ko) > with this patch? Once you do that, rerun the test with cFYI turned up, > and it should help point out what the problem is. > > Thanks,
Ok i am now rebuilding the kernel and will report when i have results. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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