From 3b36a857980b1f9fa5a6be0253e85c975f35c13f Mon Sep 17 00:00:00 2001
From: Stefan Metzmacher <metze@samba.org>
Date: Tue, 11 Jul 2006 18:15:42 +0000
Subject: r16950: remove the smb mid from the ntvfs layer and keep a list of
 pending requests on the smbsrv_connection, to be able to match then on
 ntcancel

metze
(This used to be commit 04f0d3d03179b6060fd013b867d13caa92ec6460)
---
 source4/smb_server/smb/reply.c        | 23 ++++++++++++++++++-----
 source4/smb_server/smb/request.c      |  8 ++++++++
 source4/smb_server/smb/service.c      |  1 -
 source4/smb_server/smb2/smb2_server.h |  1 -
 source4/smb_server/smb2/tcon.c        |  1 -
 source4/smb_server/smb_server.h       | 29 ++++++++++++++++++-----------
 6 files changed, 44 insertions(+), 19 deletions(-)

(limited to 'source4/smb_server')

diff --git a/source4/smb_server/smb/reply.c b/source4/smb_server/smb/reply.c
index 75830ae73a..c79ad15ea8 100644
--- a/source4/smb_server/smb/reply.c
+++ b/source4/smb_server/smb/reply.c
@@ -633,7 +633,6 @@ void smbsrv_reply_readbraw(struct smbsrv_request *req)
 	req->ntvfs = ntvfs_request_create(req->tcon->ntvfs, req,
 					  req->session->session_info,
 					  SVAL(req->in.hdr,HDR_PID),
-					  SVAL(req->in.hdr,HDR_MID),
 					  req->request_time,
 					  req, NULL, 0);
 	if (!req->ntvfs) {
@@ -2197,10 +2196,24 @@ void smbsrv_reply_ntcreate_and_X(struct smbsrv_request *req)
 ****************************************************************************/
 void smbsrv_reply_ntcancel(struct smbsrv_request *req)
 {
-	/* NOTE: this request does not generate a reply */
-	SMBSRV_SETUP_NTVFS_REQUEST(NULL,0);
-	ntvfs_cancel(req->ntvfs);
-	talloc_free(req);
+	struct smbsrv_request *r;
+	uint16_t mid = SVAL(req->in.hdr,HDR_MID);
+	uint16_t pid = SVAL(req->in.hdr,HDR_PID);
+
+	for (r = req->smb_conn->requests; r; r = r->next) {
+		if (mid != SVAL(r->in.hdr,HDR_MID)) continue;
+		/* do we really need to check the PID? */
+		if (pid != SVAL(r->in.hdr,HDR_PID)) continue;
+
+		SMBSRV_CHECK(ntvfs_cancel(r->ntvfs));
+
+		/* NOTE: this request does not generate a reply */
+		talloc_free(req);
+		return;
+	}
+
+	/* TODO: workout the correct error code */
+	smbsrv_send_error(req, NT_STATUS_FOOBAR);
 }
 
 /*
diff --git a/source4/smb_server/smb/request.c b/source4/smb_server/smb/request.c
index a08ae46852..fc7d060ea8 100644
--- a/source4/smb_server/smb/request.c
+++ b/source4/smb_server/smb/request.c
@@ -33,6 +33,12 @@
 /* we over allocate the data buffer to prevent too many realloc calls */
 #define REQ_OVER_ALLOCATION 0
 
+static int smbsrv_request_destructor(struct smbsrv_request *req)
+{
+	DLIST_REMOVE(req->smb_conn->requests, req);
+	return 0;
+}
+
 /****************************************************************************
 construct a basic request packet, mostly used to construct async packets
 such as change notify and oplock break requests
@@ -49,6 +55,8 @@ struct smbsrv_request *smbsrv_init_request(struct smbsrv_connection *smb_conn)
 	/* setup the request context */
 	req->smb_conn = smb_conn;
 
+	talloc_set_destructor(req, smbsrv_request_destructor);
+
 	return req;
 }
 
diff --git a/source4/smb_server/smb/service.c b/source4/smb_server/smb/service.c
index 676f417619..92967d858c 100644
--- a/source4/smb_server/smb/service.c
+++ b/source4/smb_server/smb/service.c
@@ -89,7 +89,6 @@ static NTSTATUS make_connection_snum(struct smbsrv_request *req,
 	req->ntvfs = ntvfs_request_create(req->tcon->ntvfs, req,
 					  req->session->session_info,
 					  SVAL(req->in.hdr,HDR_PID),
-					  SVAL(req->in.hdr,HDR_MID),
 					  req->request_time,
 					  req, NULL, 0);
 	if (!req->ntvfs) {
diff --git a/source4/smb_server/smb2/smb2_server.h b/source4/smb_server/smb2/smb2_server.h
index ce13756836..838abdf4d6 100644
--- a/source4/smb_server/smb2/smb2_server.h
+++ b/source4/smb_server/smb2/smb2_server.h
@@ -103,7 +103,6 @@ struct smbsrv_request;
 	req->ntvfs = ntvfs_request_create(req->tcon->ntvfs, req, \
 					  req->session->session_info,\
 					  0, \
-					  0, \
 					  req->request_time, \
 					  req, send_fn, state); \
 	if (!req->ntvfs) { \
diff --git a/source4/smb_server/smb2/tcon.c b/source4/smb_server/smb2/tcon.c
index cc0a911224..338fb5ed22 100644
--- a/source4/smb_server/smb2/tcon.c
+++ b/source4/smb_server/smb2/tcon.c
@@ -242,7 +242,6 @@ static NTSTATUS smb2srv_tcon_backend(struct smb2srv_request *req, union smb_tcon
 	req->ntvfs = ntvfs_request_create(req->tcon->ntvfs, req,
 					  req->session->session_info,
 					  0, /* TODO: fill in PID */
-					  0, /* TODO: fill in MID */
 					  req->request_time,
 					  req, NULL, 0);
 	if (!req->ntvfs) {
diff --git a/source4/smb_server/smb_server.h b/source4/smb_server/smb_server.h
index 7ad1af2d27..c546de7e1c 100644
--- a/source4/smb_server/smb_server.h
+++ b/source4/smb_server/smb_server.h
@@ -24,6 +24,7 @@
 #include "libcli/raw/interfaces.h"
 #include "lib/events/events.h"
 #include "lib/socket/socket.h"
+#include "dlinklist.h"
 
 /*
   this header declares the core context structures associated with smb
@@ -320,15 +321,11 @@ struct smbsrv_connection {
 	/* context associated with currently valid session setups */
 	struct smbsrv_sessions_context sessions;
 
-	/* the server_context holds a linked list of pending requests,
-	 * this is used for blocking locks and requests blocked due to oplock
-	 * break requests */
-	struct _smbsrv_pending_request {
-		struct _smbsrv_pending_request *next, *prev;
-	
-		/* the request itself - needs to be freed */
-		struct smbsrv_request *request;
-	} *requests;
+	/*
+	 * the server_context holds a linked list of pending requests,
+	 * this is used for finding the request structures on ntcancel requests
+	 */
+	struct smbsrv_request *requests;
 
 	struct smb_signing_context signing;
 
@@ -387,7 +384,6 @@ struct smbsrv_connection {
 	req->ntvfs = ntvfs_request_create(req->tcon->ntvfs, req, \
 					  req->session->session_info,\
 					  SVAL(req->in.hdr,HDR_PID), \
-					  SVAL(req->in.hdr,HDR_MID), \
 					  req->request_time, \
 					  req, send_fn, state); \
 	if (!req->ntvfs) { \
@@ -418,6 +414,15 @@ struct smbsrv_connection {
 	} \
 } while (0)
 
+#define SMBSRV_CHECK(cmd) do {\
+	NTSTATUS _status; \
+	_status = cmd; \
+	if (!NT_STATUS_IS_OK(_status)) { \
+		smbsrv_send_error(req,  _status); \
+		return; \
+	} \
+} while (0)
+
 /* 
    check if the backend wants to handle the request asynchronously.
    if it wants it handled synchronously then call the send function
@@ -425,7 +430,9 @@ struct smbsrv_connection {
 */
 #define SMBSRV_CALL_NTVFS_BACKEND(cmd) do { \
 	req->ntvfs->async_states->status = cmd; \
-	if (!(req->ntvfs->async_states->state & NTVFS_ASYNC_STATE_ASYNC)) { \
+	if (req->ntvfs->async_states->state & NTVFS_ASYNC_STATE_ASYNC) { \
+		DLIST_ADD_END(req->smb_conn->requests, req, struct smbsrv_request *); \
+	} else { \
 		req->ntvfs->async_states->send_fn(req->ntvfs); \
 	} \
 } while (0)
-- 
cgit