RE: [PATCH 2/8] cifs: make smb_send_rqst take an array of requests

[Pavel Shilovskiy <pshilov@xxxxxxxxxxxxx>]

Reviewed-by: Pavel Shilovsky <pshilov@xxxxxxxxxxxxx>

-----Original Message-----
From: linux-cifs-owner@xxxxxxxxxxxxxxx <linux-cifs-owner@xxxxxxxxxxxxxxx> On Behalf Of Ronnie Sahlberg
Sent: Tuesday, July 31, 2018 4:26 PM
To: linux-cifs <linux-cifs@xxxxxxxxxxxxxxx>
Cc: Steve French <smfrench@xxxxxxxxx>
Subject: [PATCH 2/8] cifs: make smb_send_rqst take an array of requests

Signed-off-by: Ronnie Sahlberg <lsahlber@xxxxxxxxxx>
---
 fs/cifs/transport.c | 21 +++++++++++++--------
 1 file changed, 13 insertions(+), 8 deletions(-)

diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c index a826baf68bc3..e3297cf5db42 100644
--- a/fs/cifs/transport.c
+++ b/fs/cifs/transport.c
@@ -372,10 +372,11 @@ __smb_send_rqst(struct TCP_Server_Info *server, int num_rqst,
 	return rc;
 }
 
-#define MAX_COMPOUND 2
+#define MAX_COMPOUND 5
 
 static int
-smb_send_rqst(struct TCP_Server_Info *server, struct smb_rqst *rqst, int flags)
+smb_send_rqst(struct TCP_Server_Info *server, int num_rqst,
+	      struct smb_rqst *rqst, int flags)
 {
 	struct kvec iov;
 	struct smb2_transform_hdr tr_hdr;
@@ -383,7 +384,10 @@ smb_send_rqst(struct TCP_Server_Info *server, struct smb_rqst *rqst, int flags)
 	int rc;
 
 	if (!(flags & CIFS_TRANSFORM_REQ))
-		return __smb_send_rqst(server, 1, rqst);
+		return __smb_send_rqst(server, num_rqst, rqst);
+
+	if (num_rqst > MAX_COMPOUND - 1)
+		return -ENOMEM;
 
 	memset(&cur_rqst[0], 0, sizeof(cur_rqst));
 	memset(&iov, 0, sizeof(iov));
@@ -400,12 +404,13 @@ smb_send_rqst(struct TCP_Server_Info *server, struct smb_rqst *rqst, int flags)
 		return -EIO;
 	}
 
-	rc = server->ops->init_transform_rq(server, 2, &cur_rqst[0], rqst);
+	rc = server->ops->init_transform_rq(server, num_rqst + 1,
+					    &cur_rqst[0], rqst);
 	if (rc)
 		return rc;
 
-	rc = __smb_send_rqst(server, 2, &cur_rqst[0]);
-	smb3_free_compound_rqst(1, &cur_rqst[1]);
+	rc = __smb_send_rqst(server, num_rqst + 1, &cur_rqst[0]);
+	smb3_free_compound_rqst(num_rqst, &cur_rqst[1]);
 	return rc;
 }
 
@@ -619,7 +624,7 @@ cifs_call_async(struct TCP_Server_Info *server, struct smb_rqst *rqst,
 	 */
 	cifs_save_when_sent(mid);
 	cifs_in_send_inc(server);
-	rc = smb_send_rqst(server, rqst, flags);
+	rc = smb_send_rqst(server, 1, rqst, flags);
 	cifs_in_send_dec(server);
 
 	if (rc < 0) {
@@ -809,7 +814,7 @@ cifs_send_recv(const unsigned int xid, struct cifs_ses *ses,
 
 	midQ->mid_state = MID_REQUEST_SUBMITTED;
 	cifs_in_send_inc(ses->server);
-	rc = smb_send_rqst(ses->server, rqst, flags);
+	rc = smb_send_rqst(ses->server, 1, rqst, flags);
 	cifs_in_send_dec(ses->server);
 	cifs_save_when_sent(midQ);
 
--
2.13.3

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