Re: pcap of misbehaving fallocate over cifs rdma

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Steve French <smfrench@xxxxxxxxx> wrote:

> I am puzzled ... you show the fallocate failing but why do you mention
> it sending data, sending writes

smb3_simple_fallocate_write_range() sends data.

> - when I try the fallocate you pasted above I see what is in the attached
> screenshot go over the network (no writes) - and your example looks like it
> simply doesn't send anything then resets the session at frame 93

Look at frame 92.  That's the concluding packet of the write performed by
smb3_simple_fallocate_write_range().

  74 4.568861795  192.168.6.2 -> 192.168.6.1  SMB2 250 Ioctl Request FSCTL_QUERY_ALLOCATED_RANGES File: hello
   75 4.569429926  192.168.6.1 -> 192.168.6.2  SMB2 242 Ioctl Response FSCTL_QUERY_ALLOCATED_RANGES
   77 4.680495774  192.168.6.2 -> 192.168.6.1  DDP/RDMA 1514 50018 > 5445 Send [more DDP segments]
   78 4.680496219  192.168.6.2 -> 192.168.6.1  DDP/RDMA 1514 50018 > 5445 Send [more DDP segments]
   79 4.680496364  192.168.6.2 -> 192.168.6.1  DDP/RDMA 1514 50018 > 5445 Send [more DDP segments]
   80 4.680496552  192.168.6.2 -> 192.168.6.1  DDP/RDMA 1514 50018 > 5445 Send [more DDP segments]
   81 4.680496698  192.168.6.2 -> 192.168.6.1  DDP/RDMA 1514 50018 > 5445 Send [more DDP segments]
   82 4.680496844  192.168.6.2 -> 192.168.6.1  DDP/RDMA 1514 50018 > 5445 Send [more DDP segments]
   83 4.680496989  192.168.6.2 -> 192.168.6.1  DDP/RDMA 1514 50018 > 5445 Send [more DDP segments]
   84 4.680497177  192.168.6.2 -> 192.168.6.1  DDP/RDMA 1514 50018 > 5445 Send [more DDP segments]
   88 4.680638842  192.168.6.2 -> 192.168.6.1  DDP/RDMA 1514 50018 > 5445 Send [more DDP segments]
   89 4.680639016  192.168.6.2 -> 192.168.6.1  DDP/RDMA 1514 50018 > 5445 Send [more DDP segments]
   90 4.680704523  192.168.6.1 -> 192.168.6.2  DDP/RDMA 114 5445 > 50018 Terminate [last DDP segment]
   91 4.680735089  192.168.6.2 -> 192.168.6.1  DDP/RDMA 1514 50018 > 5445 Send [more DDP segments]
   92 4.680735359  192.168.6.2 -> 192.168.6.1  SMB2 946 Write Request Len:16384 Off:204800 File: hello

David





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