Re: [PATCH] cifs: Collapse smbd_recv_*() into smbd_recv() and just use copy_to_iter()

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David Howells <dhowells@xxxxxxxxxx> wrote:

> > And 4 is ITER_FOLIOQ.

I dumped some of the fields from the MID involved:

   CIFS: VFS: Invalid msg type 4 (mid=a4 optype=0 command=8)
   CIFS: VFS:  - rcv=cifs_readv_receive+0x0/0x270 cb=smb2_readv_callback+0x0/0x480 hand=smb3_handle_read_data+0x0/0x40

So the ITER_FOLIOQ is from netfslib.  I've attached corresponding trace log,
edited down a bit to remove some columns.  Note that the EINVAL error gets
discarded by cifs_demultiplex_thread() and replaced with EAGAIN by netfslib.

David
---
         diff-6828: netfs_rreq_ref: R=0000000c NEW         r=2
         diff-6828: netfs_read: R=0000000c READPAGE  c=00000000 ni=1d4072 s=0 l=1000 sz=400
         diff-6828: netfs_rreq_ref: R=0000000c GET SUBREQ  r=3
         diff-6828: smb3_rw_credits: R=0000000c[1] rd-submit   cred=16 chg=0 pool=1688 ifl=1
         diff-6828: netfs_sreq: R=0000000c[1] DOWN PREP  f=000 s=0 0/400 s=0 e=0
         diff-6828: smb3_rw_credits: R=0000000c[1] rd-issu-adj cred=16 chg=-15 pool=1688 ifl=1
         diff-6828: netfs_sreq: R=0000000c[1] DOWN SUBMT f=102 s=0 0/400 s=0 e=0
         diff-6828: netfs_rreq_ref: R=0000000c GET SUBREQ  r=4
         diff-6828: netfs_sreq: R=0000000c[2] ZERO SUBMT f=000 s=400 0/c00 s=0 e=0
         diff-6828: netfs_sreq: R=0000000c[2] ZERO TERM  f=102 s=400 c00/c00 s=1 e=0
         diff-6828: netfs_collect_stream: R=0000000c[0:] cto=0 frn=0
         diff-6828: netfs_rreq: R=0000000c RP WAIT-IP f=03
        cifsd-6506: netfs_sreq: R=0000000c[1] DOWN I-RTR f=102 s=0 0/400 s=0 e=0
        cifsd-6506: smb3_read_err:       R=0000000c[1] xid=200 sid=0x8 tid=0x2 fid=0xa0952 offset=0x0 len=0x400 rc=-11
        cifsd-6506: smb3_rw_credits: R=0000000c[1] rd-resp-clr cred=1 chg=0 pool=1703 ifl=1
        cifsd-6506: netfs_sreq: R=0000000c[1] DOWN I-OK  f=302 s=0 0/400 s=0 e=-11
        cifsd-6506: netfs_failure: R=0000000c[1] DOWN f=302 s=0 0/400 read e=-11
        cifsd-6506: netfs_rreq: R=0000000c RP PAUSE   f=03
        cifsd-6506: netfs_sreq: R=0000000c[1] DOWN TERM  f=702 s=0 0/400 s=0 e=-11
        cifsd-6506: netfs_rreq: R=0000000c RP WAKE-Q  f=07
        cifsd-6506: smb3_rw_credits: R=0000000c[1] rd-resp-add cred=0 chg=0 pool=1703 ifl=1
         diff-6828: netfs_collect_stream: R=0000000c[0:] cto=0 frn=0
         diff-6828: netfs_rreq: R=0000000c RP COLLECT f=07
         diff-6828: netfs_collect: R=0000000c s=0-1000
         diff-6828: netfs_collect_sreq: R=0000000c[0:01] s=0 t=0/400
         diff-6828: netfs_rreq: R=0000000c RP S-ABNDN f=07
         diff-6828: netfs_sreq: R=0000000c[1] DOWN ABNDN f=602 s=0 400/400 s=0 e=-11
         diff-6828: netfs_sreq: R=0000000c[1] DOWN FREE  f=602 s=0 400/400 s=0 e=-11
         diff-6828: netfs_rreq_ref: R=0000000c PUT SUBREQ  r=3
         diff-6828: netfs_collect_sreq: R=0000000c[0:02] s=400 t=c00/c00
         diff-6828: netfs_sreq: R=0000000c[2] ZERO ABNDN f=002 s=400 c00/c00 s=1 e=0
         diff-6828: netfs_sreq: R=0000000c[2] ZERO FREE  f=002 s=400 c00/c00 s=1 e=0
         diff-6828: netfs_rreq_ref: R=0000000c PUT SUBREQ  r=2
         diff-6828: netfs_collect_stream: R=0000000c[0:] cto=1000 frn=ffffffff
         diff-6828: netfs_collect_state: R=0000000c col=1000 cln=1000 n=8c
         diff-6828: netfs_rreq: R=0000000c RP UNPAUSE f=0b
         diff-6828: netfs_collect_stream: R=0000000c[0:] cto=1000 frn=ffffffff
         diff-6828: netfs_collect_state: R=0000000c col=1000 cln=1000 n=8
         diff-6828: netfs_rreq: R=0000000c RP COMPLET f=0b
         diff-6828: netfs_rreq: R=0000000c RP WAKE-IP f=0a
         diff-6828: netfs_rreq: R=0000000c RP DONE    f=0a
         diff-6828: netfs_rreq_ref: R=0000000c PUT WORK IP  r=1
         diff-6828: netfs_rreq: R=0000000c RP DONE-IP f=0a
         diff-6828: netfs_rreq_ref: R=0000000c PUT RETURN  r=0
kworker/u16:0-12  : netfs_rreq: R=0000000c RP FREE    f=0a






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