r20634: A *LOT* more work is necessary before touching notify remotely starts to make

sense. Until then, remove it from the tree to keep the diff between 3_0_24 and
3_0 small.

Volker
(This used to be commit f146a85e74c84e78a11e616a1cbeaeef4693a0e0)

1 files changed, 28 insertions, 439 deletions

diff --git a/source3/smbd/notify.c b/source3/smbd/notify.c
index 6bedb17261..4ec53567dd 100644
--- a/source3/smbd/notify.c
+++ b/source3/smbd/notify.c
@@ -22,7 +22,6 @@
 #include "includes.h"
 
 static struct cnotify_fns *cnotify;
-static struct notify_mid_map *notify_changes_by_mid;
 
 /****************************************************************************
  This is the structure to queue to implement NT change
@@ -34,76 +33,24 @@ static struct notify_mid_map *notify_changes_by_mid;
 struct change_notify {
 	struct change_notify *next, *prev;
 	files_struct *fsp;
+	connection_struct *conn;
 	uint32 flags;
-	uint32 max_param_count;
 	char request_buf[smb_size];
 	void *change_data;
 };
 
 static struct change_notify *change_notify_list;
 
-static BOOL notify_marshall_changes(unsigned num_changes,
-				    struct notify_change *changes,
-				    prs_struct *ps)
-{
-	int i;
-	UNISTR uni_name;
-
-	for (i=0; i<num_changes; i++) {
-		struct notify_change *c = &changes[i];
-		size_t namelen;
-		uint32 u32_tmp;	/* Temp arg to prs_uint32 to avoid
-				 * signed/unsigned issues */
-
-		namelen = convert_string_allocate(
-			NULL, CH_UNIX, CH_UTF16LE, c->name, strlen(c->name)+1,
-			&uni_name.buffer, True);
-		if ((namelen == -1) || (uni_name.buffer == NULL)) {
-			goto fail;
-		}
-
-		namelen -= 2;	/* Dump NULL termination */
-
-		/*
-		 * Offset to next entry, only if there is one
-		 */
-
-		u32_tmp = (i == num_changes-1) ? 0 : namelen + 12;
-		if (!prs_uint32("offset", ps, 1, &u32_tmp)) goto fail;
-
-		u32_tmp = c->action;
-		if (!prs_uint32("action", ps, 1, &u32_tmp)) goto fail;
-
-		u32_tmp = namelen;
-		if (!prs_uint32("namelen", ps, 1, &u32_tmp)) goto fail;
-
-		if (!prs_unistr("name", ps, 1, &uni_name)) goto fail;
-
-		/*
-		 * Not NULL terminated, decrease by the 2 UCS2 \0 chars
-		 */
-		prs_set_offset(ps, prs_offset(ps)-2);
-
-		SAFE_FREE(uni_name.buffer);
-	}
-
-	return True;
-
- fail:
-	SAFE_FREE(uni_name.buffer);
-	return False;
-}
-
 /****************************************************************************
  Setup the common parts of the return packet and send it.
 *****************************************************************************/
 
-void change_notify_reply_packet(const char *request_buf, NTSTATUS error_code)
+static void change_notify_reply_packet(char *inbuf, NTSTATUS error_code)
 {
 	char outbuf[smb_size+38];
 
 	memset(outbuf, '\0', sizeof(outbuf));
-	construct_reply_common(request_buf, outbuf);
+	construct_reply_common(inbuf, outbuf);
 
 	ERROR_NT(error_code);
 
@@ -118,45 +65,6 @@ void change_notify_reply_packet(const char *request_buf, NTSTATUS error_code)
 		exit_server_cleanly("change_notify_reply_packet: send_smb failed.");
 }
 
-void change_notify_reply(const char *request_buf, uint32 max_param_count,
-			 unsigned num_changes, struct notify_change *changes)
-{
-	char *outbuf = NULL;
-	prs_struct ps;
-	size_t buflen = smb_size+38+max_param_count;
-
-	if (!prs_init(&ps, 0, NULL, False)
-	    || !notify_marshall_changes(num_changes, changes, &ps)) {
-		change_notify_reply_packet(request_buf, NT_STATUS_NO_MEMORY);
-		goto done;
-	}
-
-	if (prs_offset(&ps) > max_param_count) {
-		/*
-		 * We exceed what the client is willing to accept. Send
-		 * nothing.
-		 */
-		change_notify_reply_packet(request_buf, NT_STATUS_OK);
-		goto done;
-	}
-
-	if (!(outbuf = SMB_MALLOC_ARRAY(char, buflen))) {
-		change_notify_reply_packet(request_buf, NT_STATUS_NO_MEMORY);
-		goto done;
-	}
-
-	construct_reply_common(request_buf, outbuf);
-
-	if (send_nt_replies(outbuf, buflen, NT_STATUS_OK, prs_data_p(&ps),
-			    prs_offset(&ps), NULL, 0) == -1) {
-		exit_server("change_notify_reply_packet: send_smb failed.");
-	}
-
- done:
-	SAFE_FREE(outbuf);
-	prs_mem_free(&ps);
-}
-
 /****************************************************************************
  Remove an entry from the list and free it, also closing any
  directory handle if necessary.
@@ -170,103 +78,37 @@ static void change_notify_remove(struct change_notify *cnbp)
 	SAFE_FREE(cnbp);
 }
 
-NTSTATUS change_notify_add_request(const char *inbuf, uint32 max_param_count,
-				   uint32 filter, struct files_struct *fsp)
-{
-	struct notify_change_request *request = NULL;
-	struct notify_mid_map *map = NULL;
-
-	if (!(request = SMB_MALLOC_P(struct notify_change_request))
-	    || !(map = SMB_MALLOC_P(struct notify_mid_map))) {
-		SAFE_FREE(request);
-		return NT_STATUS_NO_MEMORY;
-	}
-
-	request->mid_map = map;
-	map->req = request;
-
-	memcpy(request->request_buf, inbuf, sizeof(request->request_buf));
-	request->max_param_count = max_param_count;
-	request->filter = filter;
-	request->fsp = fsp;
-	DLIST_ADD_END(fsp->notify->requests, request,
-		      struct notify_change_request *);
-
-	map->mid = SVAL(inbuf, smb_mid);
-	DLIST_ADD(notify_changes_by_mid, map);
-
-	/* Push the MID of this packet on the signing queue. */
-	srv_defer_sign_response(SVAL(inbuf,smb_mid));
-
-	return NT_STATUS_OK;
-}
-
-static void change_notify_remove_request(struct notify_change_request *remove_req)
-{
-	files_struct *fsp;
-	struct notify_change_request *req;
-
-	/*
-	 * Paranoia checks, the fsp referenced must must have the request in
-	 * its list of pending requests
-	 */
-
-	fsp = remove_req->fsp;
-	SMB_ASSERT(fsp->notify != NULL);
-
-	for (req = fsp->notify->requests; req; req = req->next) {
-		if (req == remove_req) {
-			break;
-		}
-	}
-
-	if (req == NULL) {
-		smb_panic("notify_req not found in fsp's requests\n");
-	}
-
-	DLIST_REMOVE(fsp->notify->requests, req);
-	DLIST_REMOVE(notify_changes_by_mid, req->mid_map);
-	SAFE_FREE(req->mid_map);
-	SAFE_FREE(req);
-}
-
 /****************************************************************************
- Delete entries by mid from the change notify pending queue. Always send reply.
+ Delete entries by fnum from the change notify pending queue.
 *****************************************************************************/
 
-void remove_pending_change_notify_requests_by_mid(uint16 mid)
+void remove_pending_change_notify_requests_by_fid(files_struct *fsp, NTSTATUS status)
 {
-	struct notify_mid_map *map;
+	struct change_notify *cnbp, *next;
 
-	for (map = notify_changes_by_mid; map; map = map->next) {
-		if (map->mid == mid) {
-			break;
+	for (cnbp=change_notify_list; cnbp; cnbp=next) {
+		next=cnbp->next;
+		if (cnbp->fsp->fnum == fsp->fnum) {
+			change_notify_reply_packet(cnbp->request_buf,status);
+			change_notify_remove(cnbp);
 		}
 	}
-
-	if (map == NULL) {
-		return;
-	}
-
-	change_notify_reply_packet(map->req->request_buf, NT_STATUS_CANCELLED);
-	change_notify_remove_request(map->req);
 }
 
 /****************************************************************************
- Delete entries by fnum from the change notify pending queue.
+ Delete entries by mid from the change notify pending queue. Always send reply.
 *****************************************************************************/
 
-void remove_pending_change_notify_requests_by_fid(files_struct *fsp,
-						  NTSTATUS status)
+void remove_pending_change_notify_requests_by_mid(int mid)
 {
-	if (fsp->notify == NULL) {
-		return;
-	}
+	struct change_notify *cnbp, *next;
 
-	while (fsp->notify->requests != NULL) {
-		change_notify_reply_packet(
-			fsp->notify->requests->request_buf, status);
-		change_notify_remove_request(fsp->notify->requests);
+	for (cnbp=change_notify_list; cnbp; cnbp=next) {
+		next=cnbp->next;
+		if(SVAL(cnbp->request_buf,smb_mid) == mid) {
+			change_notify_reply_packet(cnbp->request_buf,NT_STATUS_CANCELLED);
+			change_notify_remove(cnbp);
+		}
 	}
 }
 
@@ -286,7 +128,7 @@ void remove_pending_change_notify_requests_by_filename(files_struct *fsp, NTSTAT
 		 * the filename are identical.
 		 */
 		if((cnbp->fsp->conn == fsp->conn) && strequal(cnbp->fsp->fsp_name,fsp->fsp_name)) {
-			change_notify_reply_packet(cnbp->request_buf, status);
+			change_notify_reply_packet(cnbp->request_buf,status);
 			change_notify_remove(cnbp);
 		}
 	}
@@ -329,27 +171,9 @@ BOOL process_pending_change_notify_queue(time_t t)
 
 		vuid = (lp_security() == SEC_SHARE) ? UID_FIELD_INVALID : SVAL(cnbp->request_buf,smb_uid);
 
-		if (cnbp->fsp->notify->num_changes != 0) {
-			DEBUG(10,("process_pending_change_notify_queue: %s "
-				  "has %d changes!\n", cnbp->fsp->fsp_name,
-				  cnbp->fsp->notify->num_changes));
-			change_notify_reply(cnbp->request_buf,
-					    cnbp->max_param_count,
-					    cnbp->fsp->notify->num_changes,
-					    cnbp->fsp->notify->changes);
-			change_notify_remove(cnbp);
-			continue;
-		}
-
-		if (cnotify->check_notify(cnbp->fsp->conn, vuid,
-					  cnbp->fsp->fsp_name, cnbp->flags,
-					  cnbp->change_data, t)) {
-			DEBUG(10,("process_pending_change_notify_queue: dir "
-				  "%s changed !\n", cnbp->fsp->fsp_name ));
-			change_notify_reply(cnbp->request_buf,
-					    cnbp->max_param_count,
-					    cnbp->fsp->notify->num_changes,
-					    cnbp->fsp->notify->changes);
+		if (cnotify->check_notify(cnbp->conn, vuid, cnbp->fsp->fsp_name, cnbp->flags, cnbp->change_data, t)) {
+			DEBUG(10,("process_pending_change_notify_queue: dir %s changed !\n", cnbp->fsp->fsp_name ));
+			change_notify_reply_packet(cnbp->request_buf,STATUS_NOTIFY_ENUM_DIR);
 			change_notify_remove(cnbp);
 		}
 	}
@@ -364,24 +188,22 @@ BOOL process_pending_change_notify_queue(time_t t)
  error.
 ****************************************************************************/
 
-BOOL change_notify_set(char *inbuf, files_struct *fsp, connection_struct *conn,
-		       uint32 flags, uint32 max_param_count)
+BOOL change_notify_set(char *inbuf, files_struct *fsp, connection_struct *conn, uint32 flags)
 {
 	struct change_notify *cnbp;
 
 	if((cnbp = SMB_MALLOC_P(struct change_notify)) == NULL) {
 		DEBUG(0,("change_notify_set: malloc fail !\n" ));
-		return False;
+		return -1;
 	}
 
 	ZERO_STRUCTP(cnbp);
 
 	memcpy(cnbp->request_buf, inbuf, smb_size);
 	cnbp->fsp = fsp;
+	cnbp->conn = conn;
 	cnbp->flags = flags;
-	cnbp->max_param_count = max_param_count;
-	cnbp->change_data = cnotify->register_notify(conn, fsp->fsp_name,
-						     flags);
+	cnbp->change_data = cnotify->register_notify(conn, fsp->fsp_name, flags);
 	
 	if (!cnbp->change_data) {
 		SAFE_FREE(cnbp);
@@ -405,237 +227,6 @@ int change_notify_fd(void)
 	return -1;
 }
 
-/* notify message definition
-
-Offset  Data			length.
-0	SMB_DEV_T dev		8
-8	SMB_INO_T inode		8
-16	uint32 filter           4
-20	uint32 action		4
-24..	name
-*/
-
-#define MSG_NOTIFY_MESSAGE_SIZE 25 /* Includes at least the '\0' terminator */
-
-struct notify_message {
-	SMB_DEV_T dev;
-	SMB_INO_T inode;
-	uint32 filter;
-	uint32 action;
-	char *name;
-};
-
-static DATA_BLOB notify_message_to_buf(const struct notify_message *msg)
-{
-	DATA_BLOB result;
-	size_t len;
-
-	len = strlen(msg->name);
-
-	result = data_blob(NULL, MSG_NOTIFY_MESSAGE_SIZE + len);
-	if (!result.data) {
-		return result;
-	}
-
-	SDEV_T_VAL(result.data, 0, msg->dev);
-	SINO_T_VAL(result.data, 8, msg->inode);
-	SIVAL(result.data, 16, msg->filter);
-	SIVAL(result.data, 20, msg->action);
-	memcpy(result.data+24, msg->name, len+1);
-
-	return result;
-}
-
-static BOOL buf_to_notify_message(void *buf, size_t len,
-				  struct notify_message *msg)
-{
-	if (len < MSG_NOTIFY_MESSAGE_SIZE) {
-		DEBUG(0, ("Got invalid notify message of len %d\n",
-			  (int)len));
-		return False;
-	}
-
-	msg->dev     = DEV_T_VAL(buf, 0);
-	msg->inode   = INO_T_VAL(buf, 8);
-	msg->filter  = IVAL(buf, 16);
-	msg->action  = IVAL(buf, 20);
-	msg->name    = ((char *)buf)+24;
-	return True;
-}
-
-void notify_action(connection_struct *conn, const char *parent,
-		   const char *name, uint32 filter, uint32_t action)
-{
-	struct share_mode_lock *lck;
-	SMB_STRUCT_STAT sbuf;
-	int i;
-	struct notify_message msg;
-	DATA_BLOB blob;
-
-	struct process_id *pids;
-	int num_pids;
-
-	DEBUG(10, ("notify_action: parent=%s, name=%s, action=%u\n",
-		   parent, name, (unsigned)action));
-
-	if (SMB_VFS_STAT(conn, parent, &sbuf) != 0) {
-		/*
-		 * Not 100% critical, ignore failure
-		 */
-		return;
-	}
-
-	if (!(lck = get_share_mode_lock(NULL, sbuf.st_dev, sbuf.st_ino,
-					NULL, NULL))) {
-		return;
-	}
-
-	msg.dev = sbuf.st_dev;
-	msg.inode = sbuf.st_ino;
-	msg.filter = filter;
-	msg.action = action;
-	msg.name = CONST_DISCARD(char *, name);
-
-	blob = notify_message_to_buf(&msg);
-	if (blob.data == NULL) {
-		DEBUG(0, ("notify_message_to_buf failed\n"));
-		return;
-	}
-
-	pids = NULL;
-	num_pids = 0;
-
-	become_root_uid_only();
-
-	for (i=0; i<lck->num_share_modes; i++) {
-		struct share_mode_entry *e = &lck->share_modes[i];
-		int j;
-		struct process_id *tmp;
-
-		for (j=0; j<num_pids; j++) {
-			if (procid_equal(&e->pid, &pids[j])) {
-				break;
-			}
-		}
-
-		if (j < num_pids) {
-			/*
-			 * Already sent to that process, skip it
-			 */
-			continue;
-		}
-
-		message_send_pid(lck->share_modes[i].pid, MSG_SMB_NOTIFY,
-				 blob.data, blob.length, True);
-
-		if (!(tmp = TALLOC_REALLOC_ARRAY(lck, pids, struct process_id,
-						 num_pids+1))) {
-			DEBUG(0, ("realloc failed\n"));
-			break;
-		}
-		pids = tmp;
-		pids[num_pids] = e->pid;
-		num_pids += 1;
-	}
-
-	unbecome_root_uid_only();
-
-	data_blob_free(&blob);
-	TALLOC_FREE(lck);
-}
-
-void notify_fname(connection_struct *conn, const char *path,
-		  uint32 filter, uint32 action)
-{
-	char *parent;
-	const char *name;
-
-	if (!parent_dirname_talloc(tmp_talloc_ctx(), path, &parent, &name)) {
-		return;
-	}
-
-	notify_action(conn, parent, name, filter, action);
-	TALLOC_FREE(parent);
-}
-
-static void notify_fsp(files_struct *fsp, struct notify_message *msg)
-{
-	struct notify_change *change, *changes;
-
-	if (fsp->notify == NULL) {
-		/*
-		 * Nobody is waiting, don't queue
-		 */
-		return;
-	}
-
-	if ((fsp->notify->requests != NULL)
-	    && (fsp->notify->requests->filter & msg->filter)) {
-		/*
-		 * Someone is waiting for the change, trigger the reply
-		 * immediately.
-		 *
-		 * TODO: do we have to walk the lists of requests pending?
-		 */
-
-		struct notify_change_request *req = fsp->notify->requests;
-		struct notify_change onechange;
-
-		onechange.action = msg->action;
-		onechange.name = msg->name;
-
-		change_notify_reply(req->request_buf, req->max_param_count,
-				    1, &onechange);
-		change_notify_remove_request(req);
-		return;
-	}
-
-	/*
-	 * Someone has triggered a notify previously, queue the change for
-	 * later. TODO: Limit the number of changes queued, test how filters
-	 * apply here. Do we have to store them?
-	 */
-
-	if (!(changes = TALLOC_REALLOC_ARRAY(
-		      fsp->notify, fsp->notify->changes,
-		      struct notify_change, fsp->notify->num_changes+1))) {
-		DEBUG(0, ("talloc_realloc failed\n"));
-		return;
-	}
-
-	fsp->notify->changes = changes;
-
-	change = &(fsp->notify->changes[fsp->notify->num_changes]);
-
-	if (!(change->name = talloc_strdup(changes, msg->name))) {
-		DEBUG(0, ("talloc_strdup failed\n"));
-		return;
-	}
-	change->action = msg->action;
-	fsp->notify->num_changes += 1;
-
-	return;
-}
-
-static void notify_message_callback(int msgtype, struct process_id pid,
-				    void *buf, size_t len)
-{
-	struct notify_message msg;
-	files_struct *fsp;
-
-	if (!buf_to_notify_message(buf, len, &msg)) {
-		return;
-	}
-
-	DEBUG(10, ("Received notify_message for 0x%x/%.0f: %d\n",
-		   (unsigned)msg.dev, (double)msg.inode, msg.action));
-
-	for(fsp = fsp_find_di_first(msg.dev, msg.inode); fsp;
-	    fsp = fsp_find_di_next(fsp)) {
-		notify_fsp(fsp, &msg);
-	}
-}
-
 /****************************************************************************
  Initialise the change notify subsystem.
 ****************************************************************************/
@@ -659,7 +250,5 @@ BOOL init_change_notify(void)
 		return False;
 	}
 
-	message_register(MSG_SMB_NOTIFY, notify_message_callback);
-
 	return True;
 }