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CIFS: SMBD: Add parameter rdata to smb2_new_read_req

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This patch is for preparing upper layer for doing SMB read via RDMA write.

When we assemble the SMB read packet header, we need to know the I/O layout
if this request is to use a RDMA write. rdata has all the information we need
for memory registration. Add rdata to smb2_new_read_req.

Signed-off-by: Long Li <longli@microsoft.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Signed-off-by: Steve French <smfrench@gmail.com>
Acked-by: Ronnie Sahlberg <lsahlber.redhat.com>
This commit is contained in:
Long Li 2017-11-07 01:54:53 -07:00 committed by Steve French
parent 3cecf4865c
commit 2dabfd5bab
1 changed files with 9 additions and 5 deletions
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14
fs/cifs/smb2pdu.c
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@ -2429,18 +2429,21 @@ SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
*/
static int
smb2_new_read_req(void **buf, unsigned int *total_len,
struct cifs_io_parms *io_parms, unsigned int remaining_bytes,
int request_type)
struct cifs_io_parms *io_parms, struct cifs_readdata *rdata,
unsigned int remaining_bytes, int request_type)
{
int rc = -EACCES;
struct smb2_read_plain_req *req = NULL;
struct smb2_sync_hdr *shdr;
struct TCP_Server_Info *server;
rc = smb2_plain_req_init(SMB2_READ, io_parms->tcon, (void **) &req,
total_len);
if (rc)
return rc;
if (io_parms->tcon->ses->server == NULL)
server = io_parms->tcon->ses->server;
if (server == NULL)
return -ECONNABORTED;
shdr = &req->sync_hdr;
@ -2568,7 +2571,8 @@ smb2_async_readv(struct cifs_readdata *rdata)
server = io_parms.tcon->ses->server;
rc = smb2_new_read_req((void **) &buf, &total_len, &io_parms, 0, 0);
rc = smb2_new_read_req(
(void **) &buf, &total_len, &io_parms, rdata, 0, 0);
if (rc) {
if (rc == -EAGAIN && rdata->credits) {
/* credits was reset by reconnect */
@ -2633,7 +2637,7 @@ SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
struct cifs_ses *ses = io_parms->tcon->ses;
*nbytes = 0;
rc = smb2_new_read_req((void **)&req, &total_len, io_parms, 0, 0);
rc = smb2_new_read_req((void **)&req, &total_len, io_parms, NULL, 0, 0);
if (rc)
return rc;