[CIFS] Add writepages support to shrink memory usage on writes,

eliminate the double copy, and improve cifs write performance and
help the server by upping the typical write size from 4K to 16K
(or even larger if wsize set explicitly)  for servers which support this.
Part 1 of 2

Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>
Signed-off-by: Steve French  <sfrench@us.ibm.com>

1 files changed, 2 insertions, 3 deletions

diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h
index dc5a6a6ff2f9..fb3e76043c50 100644
--- a/fs/cifs/cifsproto.h
+++ b/fs/cifs/cifsproto.h
@@ -48,8 +48,7 @@ extern int SendReceive(const unsigned int /* xid */ , struct cifsSesInfo *,
                         struct smb_hdr * /* out */ ,
                         int * /* bytes returned */ , const int long_op);
 extern int SendReceive2(const unsigned int /* xid */ , struct cifsSesInfo *,
-                        struct smb_hdr * /* input */ , int hdr_len,
-                        const char * /* SMB data to send */ , int data_len,
+                        struct kvec *, int /* nvec */,
                         int * /* bytes returned */ , const int long_op);
 extern int checkSMBhdr(struct smb_hdr *smb, __u16 mid);
 extern int checkSMB(struct smb_hdr *smb, __u16 mid, int length);
@@ -241,7 +240,7 @@ extern int CIFSSMBWrite(const int xid, struct cifsTconInfo *tcon,
 extern int CIFSSMBWrite2(const int xid, struct cifsTconInfo *tcon,
                         const int netfid, const unsigned int count,
                         const __u64 offset, unsigned int *nbytes, 
-                        const char *buf,const int long_op);
+                        struct kvec *iov, const int nvec, const int long_op);
 extern int CIFSGetSrvInodeNumber(const int xid, struct cifsTconInfo *tcon,
                         const unsigned char *searchName, __u64 * inode_number,
                         const struct nls_table *nls_codepage,