From: Jeff Layton <jlayton@xxxxxxxxxx>
For SMB2, this should be a no-op. Obviously if we wanted to do something
for the SMB2 case, we could also define an operation here for it.
Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxx>
Signed-off-by: Pavel Shilovsky <piastry@xxxxxxxxxxx>
---
fs/cifs/cifsglob.h | 6 +++++-
fs/cifs/smb1ops.c | 41 +++++++++++++++++++++++++++++++++++++++++
fs/cifs/transport.c | 46 ++++++++--------------------------------------
3 files changed, 54 insertions(+), 39 deletions(-)
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index 812e22a..c41bf6d 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -154,7 +154,12 @@ enum smb_version {
Smb_1 = 1,
};
+struct mid_q_entry;
+struct TCP_Server_Info;
+
struct smb_version_operations {
+ int (*send_cancel)(struct TCP_Server_Info *, void *,
+ struct mid_q_entry *);
};
struct smb_version_values {
@@ -718,7 +723,6 @@ static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
#endif
-struct mid_q_entry;
/*
* This is the prototype for the mid receive function. This function is for
diff --git a/fs/cifs/smb1ops.c b/fs/cifs/smb1ops.c
index d2850d1..fa486f0 100644
--- a/fs/cifs/smb1ops.c
+++ b/fs/cifs/smb1ops.c
@@ -18,8 +18,49 @@
*/
#include "cifsglob.h"
+#include "cifsproto.h"
+#include "cifs_debug.h"
+
+/*
+ * An NT cancel request header looks just like the original request except:
+ *
+ * The Command is SMB_COM_NT_CANCEL
+ * The WordCount is zeroed out
+ * The ByteCount is zeroed out
+ *
+ * This function mangles an existing request buffer into a
+ * SMB_COM_NT_CANCEL request and then sends it.
+ */
+static int
+send_nt_cancel(struct TCP_Server_Info *server, void *buf,
+ struct mid_q_entry *mid)
+{
+ int rc = 0;
+ struct smb_hdr *in_buf = (struct smb_hdr *)buf;
+
+ /* -4 for RFC1001 length and +2 for BCC field */
+ in_buf->smb_buf_length = cpu_to_be32(sizeof(struct smb_hdr) - 4 + 2);
+ in_buf->Command = SMB_COM_NT_CANCEL;
+ in_buf->WordCount = 0;
+ put_bcc(0, in_buf);
+
+ mutex_lock(&server->srv_mutex);
+ rc = cifs_sign_smb(in_buf, server, &mid->sequence_number);
+ if (rc) {
+ mutex_unlock(&server->srv_mutex);
+ return rc;
+ }
+ rc = smb_send(server, in_buf, be32_to_cpu(in_buf->smb_buf_length));
+ mutex_unlock(&server->srv_mutex);
+
+ cFYI(1, "issued NT_CANCEL for mid %u, rc = %d",
+ in_buf->Mid, rc);
+
+ return rc;
+}
struct smb_version_operations smb1_operations = {
+ .send_cancel = send_nt_cancel,
};
struct smb_version_values smb1_values = {
diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c
index 0961336..269a5a7 100644
--- a/fs/cifs/transport.c
+++ b/fs/cifs/transport.c
@@ -483,41 +483,11 @@ cifs_sync_mid_result(struct mid_q_entry *mid, struct TCP_Server_Info *server)
return rc;
}
-/*
- * An NT cancel request header looks just like the original request except:
- *
- * The Command is SMB_COM_NT_CANCEL
- * The WordCount is zeroed out
- * The ByteCount is zeroed out
- *
- * This function mangles an existing request buffer into a
- * SMB_COM_NT_CANCEL request and then sends it.
- */
-static int
-send_nt_cancel(struct TCP_Server_Info *server, struct smb_hdr *in_buf,
- struct mid_q_entry *mid)
+static inline int
+send_cancel(struct TCP_Server_Info *server, void *buf, struct mid_q_entry *mid)
{
- int rc = 0;
-
- /* -4 for RFC1001 length and +2 for BCC field */
- in_buf->smb_buf_length = cpu_to_be32(sizeof(struct smb_hdr) - 4 + 2);
- in_buf->Command = SMB_COM_NT_CANCEL;
- in_buf->WordCount = 0;
- put_bcc(0, in_buf);
-
- mutex_lock(&server->srv_mutex);
- rc = cifs_sign_smb(in_buf, server, &mid->sequence_number);
- if (rc) {
- mutex_unlock(&server->srv_mutex);
- return rc;
- }
- rc = smb_send(server, in_buf, be32_to_cpu(in_buf->smb_buf_length));
- mutex_unlock(&server->srv_mutex);
-
- cFYI(1, "issued NT_CANCEL for mid %u, rc = %d",
- in_buf->Mid, rc);
-
- return rc;
+ return server->ops->send_cancel ?
+ server->ops->send_cancel(server, buf, mid) : 0;
}
int
@@ -636,7 +606,7 @@ SendReceive2(const unsigned int xid, struct cifs_ses *ses,
rc = wait_for_response(ses->server, midQ);
if (rc != 0) {
- send_nt_cancel(ses->server, (struct smb_hdr *)buf, midQ);
+ send_cancel(ses->server, buf, midQ);
spin_lock(&GlobalMid_Lock);
if (midQ->mid_state == MID_REQUEST_SUBMITTED) {
midQ->callback = DeleteMidQEntry;
@@ -753,7 +723,7 @@ SendReceive(const unsigned int xid, struct cifs_ses *ses,
rc = wait_for_response(ses->server, midQ);
if (rc != 0) {
- send_nt_cancel(ses->server, in_buf, midQ);
+ send_cancel(ses->server, in_buf, midQ);
spin_lock(&GlobalMid_Lock);
if (midQ->mid_state == MID_REQUEST_SUBMITTED) {
/* no longer considered to be "in-flight" */
@@ -898,7 +868,7 @@ SendReceiveBlockingLock(const unsigned int xid, struct cifs_tcon *tcon,
if (in_buf->Command == SMB_COM_TRANSACTION2) {
/* POSIX lock. We send a NT_CANCEL SMB to cause the
blocking lock to return. */
- rc = send_nt_cancel(ses->server, in_buf, midQ);
+ rc = send_cancel(ses->server, in_buf, midQ);
if (rc) {
delete_mid(midQ);
return rc;
@@ -919,7 +889,7 @@ SendReceiveBlockingLock(const unsigned int xid, struct cifs_tcon *tcon,
rc = wait_for_response(ses->server, midQ);
if (rc) {
- send_nt_cancel(ses->server, in_buf, midQ);
+ send_cancel(ses->server, in_buf, midQ);
spin_lock(&GlobalMid_Lock);
if (midQ->mid_state == MID_REQUEST_SUBMITTED) {
/* no longer considered to be "in-flight" */
--
1.7.1
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