> From: Steve French <smfrench@xxxxxxxxx> > Sent: Saturday, September 15, 2018 2:28 AM > To: Long Li <longli@xxxxxxxxxxxxx> > Cc: Steve French <sfrench@xxxxxxxxx>; CIFS <linux-cifs@xxxxxxxxxxxxxxx>; > samba-technical <samba-technical@xxxxxxxxxxxxxxx>; LKML <linux- > kernel@xxxxxxxxxxxxxxx>; linux-rdma@xxxxxxxxxxxxxxx > Subject: Re: [Patch v3 00/16] CIFS: add support for direct I/O > > could you rebase these, patch 1 was merged quite a while ago, and patch 2 > etc. doesn't apply cleanly Sorry, I will rebase and resend. On Fri, Sep 7, 2018 at 9:18 PM Long Li > <longli@xxxxxxxxxxxxxxxxx> wrote: > > > > From: Long Li <longli@xxxxxxxxxxxxx> > > > > This patch set implements direct I/O. > > > > In normal code path (even with cache=none), CIFS copies I/O data from > > user-space to kernel-space for security reasons of possible protocol > > required signing and encryption on user data. > > > > With this patch set, CIFS passes the I/O data directly from user-space > > buffer to the transport layer, when file system is mounted with > > "cache-none". > > > > Patch v2 addressed comments from Christoph Hellwig <hch@xxxxxx> and > > Tom Talpey <ttalpey@xxxxxxxxxxxxx> to implement direct I/O for both > > socket and RDMA. > > > > Patch v3 added support for kernel AIO. > > > > > > Long Li (16): > > CIFS: Add support for direct pages in rdata > > CIFS: Use offset when reading pages > > CIFS: Add support for direct pages in wdata > > CIFS: pass page offset when issuing SMB write > > CIFS: Calculate the correct request length based on page offset and > > tail size > > CIFS: Introduce helper function to get page offset and length in > > smb_rqst > > CIFS: When sending data on socket, pass the correct page offset > > CIFS: SMBD: Support page offset in RDMA send > > CIFS: SMBD: Support page offset in RDMA recv > > CIFS: SMBD: Do not call ib_dereg_mr on invalidated memory registration > > CIFS: SMBD: Support page offset in memory registration > > CIFS: Pass page offset for calculating signature > > CIFS: Pass page offset for encrypting > > CIFS: Add support for direct I/O read > > CIFS: Add support for direct I/O write > > CIFS: Add direct I/O functions to file_operations > > > > fs/cifs/cifsencrypt.c | 9 +- > > fs/cifs/cifsfs.c | 10 +- > > fs/cifs/cifsfs.h | 2 + > > fs/cifs/cifsglob.h | 11 +- > > fs/cifs/cifsproto.h | 9 +- > > fs/cifs/cifssmb.c | 19 +- > > fs/cifs/connect.c | 5 +- > > fs/cifs/file.c | 477 > ++++++++++++++++++++++++++++++++++++++++++-------- > > fs/cifs/misc.c | 17 ++ > > fs/cifs/smb2ops.c | 22 ++- > > fs/cifs/smb2pdu.c | 20 ++- > > fs/cifs/smbdirect.c | 156 ++++++++++------- > > fs/cifs/smbdirect.h | 2 +- > > fs/cifs/transport.c | 34 ++-- > > 14 files changed, 606 insertions(+), 187 deletions(-) > > > > -- > > 2.7.4 > > > > > -- > Thanks, > > Steve
