[PATCH 08/11] cifs: change cifs_call_async to use smb_rqst structs

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For now, none of the callers populate rq_pages. That will be done for
writes in a later patch.

Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxx>
---
 fs/cifs/cifsproto.h |    8 ++++----
 fs/cifs/cifssmb.c   |   20 +++++++++++++-------
 fs/cifs/transport.c |   18 +++++++++---------
 3 files changed, 26 insertions(+), 20 deletions(-)

diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h
index b2daad4..dbb9c61 100644
--- a/fs/cifs/cifsproto.h
+++ b/fs/cifs/cifsproto.h
@@ -71,10 +71,10 @@ extern char *cifs_compose_mount_options(const char *sb_mountdata,
 extern struct mid_q_entry *AllocMidQEntry(const struct smb_hdr *smb_buffer,
 					struct TCP_Server_Info *server);
 extern void DeleteMidQEntry(struct mid_q_entry *midEntry);
-extern int cifs_call_async(struct TCP_Server_Info *server, struct kvec *iov,
-			   unsigned int nvec, mid_receive_t *receive,
-			   mid_callback_t *callback, void *cbdata,
-			   bool ignore_pend);
+extern int cifs_call_async(struct TCP_Server_Info *server,
+			struct smb_rqst *rqst, mid_receive_t *receive,
+			mid_callback_t *callback, void *cbdata,
+			bool ignore_pend);
 extern int SendReceive(const unsigned int /* xid */ , struct cifs_ses *,
 			struct smb_hdr * /* input */ ,
 			struct smb_hdr * /* out */ ,
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index c010c279..727f35e 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -753,6 +753,8 @@ CIFSSMBEcho(struct TCP_Server_Info *server)
 	ECHO_REQ *smb;
 	int rc = 0;
 	struct kvec iov;
+	struct smb_rqst rqst = { .rq_iov = &iov,
+				 .rq_nvec = 1 };
 
 	cFYI(1, "In echo request");
 
@@ -770,7 +772,7 @@ CIFSSMBEcho(struct TCP_Server_Info *server)
 	iov.iov_base = smb;
 	iov.iov_len = be32_to_cpu(smb->hdr.smb_buf_length) + 4;
 
-	rc = cifs_call_async(server, &iov, 1, NULL, cifs_echo_callback,
+	rc = cifs_call_async(server, &rqst, NULL, cifs_echo_callback,
 			     server, true);
 	if (rc)
 		cFYI(1, "Echo request failed: %d", rc);
@@ -1602,6 +1604,8 @@ cifs_async_readv(struct cifs_readdata *rdata)
 	READ_REQ *smb = NULL;
 	int wct;
 	struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
+	struct smb_rqst rqst = { .rq_iov = rdata->iov,
+				 .rq_nvec = 1 };
 
 	cFYI(1, "%s: offset=%llu bytes=%u", __func__,
 		rdata->offset, rdata->bytes);
@@ -1645,9 +1649,8 @@ cifs_async_readv(struct cifs_readdata *rdata)
 	rdata->iov[0].iov_len = be32_to_cpu(smb->hdr.smb_buf_length) + 4;
 
 	kref_get(&rdata->refcount);
-	rc = cifs_call_async(tcon->ses->server, rdata->iov, 1,
-			     cifs_readv_receive, cifs_readv_callback,
-			     rdata, false);
+	rc = cifs_call_async(tcon->ses->server, &rqst, cifs_readv_receive,
+			     cifs_readv_callback, rdata, false);
 
 	if (rc == 0)
 		cifs_stats_inc(&tcon->num_reads);
@@ -2050,6 +2053,7 @@ cifs_async_writev(struct cifs_writedata *wdata)
 	int wct;
 	struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
 	struct kvec *iov = NULL;
+	struct smb_rqst rqst = { };
 
 	if (tcon->ses->capabilities & CAP_LARGE_FILES) {
 		wct = 14;
@@ -2066,11 +2070,13 @@ cifs_async_writev(struct cifs_writedata *wdata)
 		goto async_writev_out;
 
 	/* 1 iov per page + 1 for header */
-	iov = kzalloc((wdata->nr_pages + 1) * sizeof(*iov), GFP_NOFS);
+	rqst.rq_nvec = wdata->nr_pages + 1;
+	iov = kzalloc((rqst.rq_nvec) * sizeof(*iov), GFP_NOFS);
 	if (iov == NULL) {
 		rc = -ENOMEM;
 		goto async_writev_out;
 	}
+	rqst.rq_iov = iov;
 
 	smb->hdr.Pid = cpu_to_le16((__u16)wdata->pid);
 	smb->hdr.PidHigh = cpu_to_le16((__u16)(wdata->pid >> 16));
@@ -2119,8 +2125,8 @@ cifs_async_writev(struct cifs_writedata *wdata)
 	}
 
 	kref_get(&wdata->refcount);
-	rc = cifs_call_async(tcon->ses->server, iov, wdata->nr_pages + 1,
-			     NULL, cifs_writev_callback, wdata, false);
+	rc = cifs_call_async(tcon->ses->server, &rqst, NULL,
+				cifs_writev_callback, wdata, false);
 
 	if (rc == 0)
 		cifs_stats_inc(&tcon->num_writes);
diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c
index 8e689d1..83a1489 100644
--- a/fs/cifs/transport.c
+++ b/fs/cifs/transport.c
@@ -455,11 +455,11 @@ wait_for_response(struct TCP_Server_Info *server, struct mid_q_entry *midQ)
 }
 
 static int
-cifs_setup_async_request(struct TCP_Server_Info *server, struct kvec *iov,
-			 unsigned int nvec, struct mid_q_entry **ret_mid)
+cifs_setup_async_request(struct TCP_Server_Info *server, struct smb_rqst *rqst,
+			 struct mid_q_entry **ret_mid)
 {
 	int rc;
-	struct smb_hdr *hdr = (struct smb_hdr *)iov[0].iov_base;
+	struct smb_hdr *hdr = (struct smb_hdr *)rqst->rq_iov[0].iov_base;
 	struct mid_q_entry *mid;
 
 	/* enable signing if server requires it */
@@ -475,7 +475,7 @@ cifs_setup_async_request(struct TCP_Server_Info *server, struct kvec *iov,
 	list_add_tail(&mid->qhead, &server->pending_mid_q);
 	spin_unlock(&GlobalMid_Lock);
 
-	rc = cifs_sign_smbv(iov, nvec, server, &mid->sequence_number);
+	rc = cifs_sign_rqst(rqst, server, &mid->sequence_number);
 	if (rc)
 		delete_mid(mid);
 	*ret_mid = mid;
@@ -487,9 +487,9 @@ cifs_setup_async_request(struct TCP_Server_Info *server, struct kvec *iov,
  * the result. Caller is responsible for dealing with timeouts.
  */
 int
-cifs_call_async(struct TCP_Server_Info *server, struct kvec *iov,
-		unsigned int nvec, mid_receive_t *receive,
-		mid_callback_t *callback, void *cbdata, bool ignore_pend)
+cifs_call_async(struct TCP_Server_Info *server, struct smb_rqst *rqst,
+		mid_receive_t *receive, mid_callback_t *callback,
+		void *cbdata, bool ignore_pend)
 {
 	int rc;
 	struct mid_q_entry *mid;
@@ -499,7 +499,7 @@ cifs_call_async(struct TCP_Server_Info *server, struct kvec *iov,
 		return rc;
 
 	mutex_lock(&server->srv_mutex);
-	rc = cifs_setup_async_request(server, iov, nvec, &mid);
+	rc = cifs_setup_async_request(server, rqst, &mid);
 	if (rc) {
 		mutex_unlock(&server->srv_mutex);
 		add_credits(server, 1);
@@ -513,7 +513,7 @@ cifs_call_async(struct TCP_Server_Info *server, struct kvec *iov,
 	mid->mid_state = MID_REQUEST_SUBMITTED;
 
 	cifs_in_send_inc(server);
-	rc = smb_sendv(server, iov, nvec);
+	rc = smb_send_rqst(server, rqst);
 	cifs_in_send_dec(server);
 	cifs_save_when_sent(mid);
 	mutex_unlock(&server->srv_mutex);
-- 
1.7.10.4

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