X-Git-Url: http://git.samba.org/samba.git/?p=nivanova%2Fsamba-autobuild%2F.git;a=blobdiff_plain;f=source3%2Fsmbd%2Fnotify.c;h=a70f86df007b486f1e2e9e5fd95ef70bbab96c49;hp=3b01c2c786791885a867be33c8454996b1aa17a9;hb=d5e6a47f064a3923b1e257ab84fa7ccd7c4f89f4;hpb=90f59d441223ba9b32b0d788901c9de5cf4b3bc7

diff --git a/source3/smbd/notify.c b/source3/smbd/notify.c
index 3b01c2c7867..a70f86df007 100644
--- a/source3/smbd/notify.c
+++ b/source3/smbd/notify.c
@@ -3,10 +3,11 @@
    change notify handling
    Copyright (C) Andrew Tridgell 2000
    Copyright (C) Jeremy Allison 1994-1998
+   Copyright (C) Volker Lendecke 2007
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 2 of the License, or
+   the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
@@ -15,31 +16,29 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software
-   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
 #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
- notify. It consists of smb_size bytes stored from the
- transact command (to keep the mid, tid etc around).
- Plus the fid to examine and notify private data.
-*****************************************************************************/
-
-struct change_notify {
-	struct change_notify *next, *prev;
-	files_struct *fsp;
-	uint32 flags;
-	uint32 max_param_count;
-	char request_buf[smb_size];
-	void *change_data;
+#include "smbd/smbd.h"
+#include "smbd/globals.h"
+#include "../librpc/gen_ndr/ndr_notify.h"
+
+struct notify_change_request {
+	struct notify_change_request *prev, *next;
+	struct files_struct *fsp;	/* backpointer for cancel by mid */
+	struct smb_request *req;
+	uint32 filter;
+	uint32 max_param;
+	void (*reply_fn)(struct smb_request *req,
+			 NTSTATUS error_code,
+			 uint8_t *buf, size_t len);
+	struct notify_mid_map *mid_map;
+	void *backend_data;
 };
 
+static void notify_fsp(files_struct *fsp, uint32 action, const char *name);
+
 /*
  * For NTCancel, we need to find the notify_change_request indexed by
  * mid. Separate list here.
@@ -48,171 +47,213 @@ struct change_notify {
 struct notify_mid_map {
 	struct notify_mid_map *prev, *next;
 	struct notify_change_request *req;
-	uint16 mid;
+	uint64_t mid;
 };
 
-static struct change_notify *change_notify_list;
+static bool notify_change_record_identical(struct notify_change *c1,
+					struct notify_change *c2)
+{
+	/* Note this is deliberately case sensitive. */
+	if (c1->action == c2->action &&
+			strcmp(c1->name, c2->name) == 0) {
+		return True;
+	}
+	return False;
+}
 
-static BOOL notify_marshall_changes(unsigned num_changes,
-				    struct notify_change *changes,
-				    prs_struct *ps)
+static bool notify_marshall_changes(int num_changes,
+				uint32 max_offset,
+				struct notify_change *changes,
+				DATA_BLOB *final_blob)
 {
 	int i;
-	UNISTR uni_name;
+
+	if (num_changes == -1) {
+		return false;
+	}
 
 	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;
+		enum ndr_err_code ndr_err;
+		struct notify_change *c;
+		struct FILE_NOTIFY_INFORMATION m;
+		DATA_BLOB blob;
+
+		/* Coalesce any identical records. */
+		while (i+1 < num_changes &&
+			notify_change_record_identical(&changes[i],
+						&changes[i+1])) {
+			i++;
 		}
 
-		namelen -= 2;	/* Dump NULL termination */
+		c = &changes[i];
+
+		m.FileName1 = c->name;
+		m.FileNameLength = strlen_m(c->name)*2;
+		m.Action = c->action;
+		m.NextEntryOffset = (i == num_changes-1) ? 0 : ndr_size_FILE_NOTIFY_INFORMATION(&m, 0);
 
 		/*
 		 * 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;
+		ndr_err = ndr_push_struct_blob(&blob, talloc_tos(), &m,
+			(ndr_push_flags_fn_t)ndr_push_FILE_NOTIFY_INFORMATION);
+		if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+			return false;
+		}
 
-		u32_tmp = c->action;
-		if (!prs_uint32("action", ps, 1, &u32_tmp)) goto fail;
+		if (DEBUGLEVEL >= 10) {
+			NDR_PRINT_DEBUG(FILE_NOTIFY_INFORMATION, &m);
+		}
 
-		u32_tmp = namelen;
-		if (!prs_uint32("namelen", ps, 1, &u32_tmp)) goto fail;
+		if (!data_blob_append(talloc_tos(), final_blob,
+				      blob.data, blob.length)) {
+			data_blob_free(&blob);
+			return false;
+		}
 
-		if (!prs_unistr("name", ps, 1, &uni_name)) goto fail;
+		data_blob_free(&blob);
 
-		/*
-		 * Not NULL terminated, decrease by the 2 UCS2 \0 chars
-		 */
-		prs_set_offset(ps, prs_offset(ps)-2);
-
-		SAFE_FREE(uni_name.buffer);
+		if (final_blob->length > max_offset) {
+			/* Too much data for client. */
+			DEBUG(10, ("Client only wanted %d bytes, trying to "
+				   "marshall %d bytes\n", (int)max_offset,
+				   (int)final_blob->length));
+			return False;
+		}
 	}
 
 	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)
+void change_notify_reply(struct smb_request *req,
+			 NTSTATUS error_code,
+			 uint32_t max_param,
+			 struct notify_change_buf *notify_buf,
+			 void (*reply_fn)(struct smb_request *req,
+					  NTSTATUS error_code,
+					  uint8_t *buf, size_t len))
 {
-	char outbuf[smb_size+38];
-
-	memset(outbuf, '\0', sizeof(outbuf));
-	construct_reply_common(request_buf, outbuf);
-
-	ERROR_NT(error_code);
+	DATA_BLOB blob = data_blob_null;
 
-	/*
-	 * Seems NT needs a transact command with an error code
-	 * in it. This is a longer packet than a simple error.
-	 */
-	set_message(outbuf,18,0,False);
-
-	show_msg(outbuf);
-	if (!send_smb(smbd_server_fd(),outbuf))
-		exit_server_cleanly("change_notify_reply_packet: send_smb failed.");
-}
+	if (!NT_STATUS_IS_OK(error_code)) {
+		reply_fn(req, error_code, NULL, 0);
+		return;
+	}
 
-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 (max_param == 0 || notify_buf == NULL) {
+		reply_fn(req, NT_STATUS_OK, NULL, 0);
+		return;
 	}
 
-	if (prs_offset(&ps) > max_param_count) {
+	if (!notify_marshall_changes(notify_buf->num_changes, max_param,
+					notify_buf->changes, &blob)) {
 		/*
 		 * 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;
+		data_blob_free(&blob);
 	}
 
-	construct_reply_common(request_buf, outbuf);
+	reply_fn(req, NT_STATUS_OK, blob.data, blob.length);
 
-	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.");
-	}
+	data_blob_free(&blob);
 
- done:
-	SAFE_FREE(outbuf);
-	prs_mem_free(&ps);
+	TALLOC_FREE(notify_buf->changes);
+	notify_buf->num_changes = 0;
 }
 
-/****************************************************************************
- Remove an entry from the list and free it, also closing any
- directory handle if necessary.
-*****************************************************************************/
+static void notify_callback(void *private_data, const struct notify_event *e)
+{
+	files_struct *fsp = (files_struct *)private_data;
+	DEBUG(10, ("notify_callback called for %s\n", fsp_str_dbg(fsp)));
+	notify_fsp(fsp, e->action, e->path);
+}
 
-static void change_notify_remove(struct change_notify *cnbp)
+NTSTATUS change_notify_create(struct files_struct *fsp, uint32 filter,
+			      bool recursive)
 {
-	cnotify->remove_notify(cnbp->change_data);
-	DLIST_REMOVE(change_notify_list, cnbp);
-	ZERO_STRUCTP(cnbp);
-	SAFE_FREE(cnbp);
+	char *fullpath;
+	struct notify_entry e;
+	NTSTATUS status;
+
+	SMB_ASSERT(fsp->notify == NULL);
+
+	if (!(fsp->notify = TALLOC_ZERO_P(NULL, struct notify_change_buf))) {
+		DEBUG(0, ("talloc failed\n"));
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	/* Do notify operations on the base_name. */
+	if (asprintf(&fullpath, "%s/%s", fsp->conn->connectpath,
+		     fsp->fsp_name->base_name) == -1) {
+		DEBUG(0, ("asprintf failed\n"));
+		TALLOC_FREE(fsp->notify);
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	ZERO_STRUCT(e);
+	e.path = fullpath;
+	e.dir_fd = fsp->fh->fd;
+	e.dir_id = fsp->file_id;
+	e.filter = filter;
+	e.subdir_filter = 0;
+	if (recursive) {
+		e.subdir_filter = filter;
+	}
+
+	status = notify_add(fsp->conn->notify_ctx, &e, notify_callback, fsp);
+	SAFE_FREE(fullpath);
+
+	return status;
 }
 
-NTSTATUS change_notify_add_request(const char *inbuf, uint32 max_param_count,
-				   uint32 filter, struct files_struct *fsp)
+NTSTATUS change_notify_add_request(struct smb_request *req,
+				uint32 max_param,
+				uint32 filter, bool recursive,
+				struct files_struct *fsp,
+				void (*reply_fn)(struct smb_request *req,
+					NTSTATUS error_code,
+					uint8_t *buf, size_t len))
 {
 	struct notify_change_request *request = NULL;
 	struct notify_mid_map *map = NULL;
+	struct smbd_server_connection *sconn = req->sconn;
+
+	DEBUG(10, ("change_notify_add_request: Adding request for %s: "
+		   "max_param = %d\n", fsp_str_dbg(fsp), (int)max_param));
 
-	if (!(request = SMB_MALLOC_P(struct notify_change_request))
-	    || !(map = SMB_MALLOC_P(struct notify_mid_map))) {
-		SAFE_FREE(request);
+	if (!(request = talloc(NULL, struct notify_change_request))
+	    || !(map = talloc(request, struct notify_mid_map))) {
+		TALLOC_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->req = talloc_move(request, &req);
+	request->max_param = max_param;
 	request->filter = filter;
 	request->fsp = fsp;
+	request->reply_fn = reply_fn;
+	request->backend_data = NULL;
+
 	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));
+	map->mid = request->req->mid;
+	DLIST_ADD(sconn->smb1.notify_mid_maps, map);
 
 	return NT_STATUS_OK;
 }
 
-static void change_notify_remove_request(struct notify_change_request *remove_req)
+static void change_notify_remove_request(struct smbd_server_connection *sconn,
+					 struct notify_change_request *remove_req)
 {
 	files_struct *fsp;
 	struct notify_change_request *req;
@@ -232,24 +273,24 @@ static void change_notify_remove_request(struct notify_change_request *remove_re
 	}
 
 	if (req == NULL) {
-		smb_panic("notify_req not found in fsp's requests\n");
+		smb_panic("notify_req not found in fsp's requests");
 	}
 
 	DLIST_REMOVE(fsp->notify->requests, req);
-	DLIST_REMOVE(notify_changes_by_mid, req->mid_map);
-	SAFE_FREE(req->mid_map);
-	SAFE_FREE(req);
+	DLIST_REMOVE(sconn->smb1.notify_mid_maps, req->mid_map);
+	TALLOC_FREE(req);
 }
 
 /****************************************************************************
  Delete entries by mid from the change notify pending queue. Always send reply.
 *****************************************************************************/
 
-void remove_pending_change_notify_requests_by_mid(uint16 mid)
+void remove_pending_change_notify_requests_by_mid(
+	struct smbd_server_connection *sconn, uint64_t mid)
 {
 	struct notify_mid_map *map;
 
-	for (map = notify_changes_by_mid; map; map = map->next) {
+	for (map = sconn->smb1.notify_mid_maps; map; map = map->next) {
 		if (map->mid == mid) {
 			break;
 		}
@@ -259,319 +300,88 @@ void remove_pending_change_notify_requests_by_mid(uint16 mid)
 		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.
-*****************************************************************************/
-
-void remove_pending_change_notify_requests_by_fid(files_struct *fsp,
-						  NTSTATUS status)
-{
-	if (fsp->notify == NULL) {
-		return;
-	}
-
-	while (fsp->notify->requests != NULL) {
-		change_notify_reply_packet(
-			fsp->notify->requests->request_buf, status);
-		change_notify_remove_request(fsp->notify->requests);
-	}
+	change_notify_reply(map->req->req,
+			    NT_STATUS_CANCELLED, 0, NULL, map->req->reply_fn);
+	change_notify_remove_request(sconn, map->req);
 }
 
-/****************************************************************************
- Delete entries by filename and cnum from the change notify pending queue.
- Always send reply.
-*****************************************************************************/
-
-void remove_pending_change_notify_requests_by_filename(files_struct *fsp, NTSTATUS status)
+void smbd_notify_cancel_by_smbreq(const struct smb_request *smbreq)
 {
-	struct change_notify *cnbp, *next;
+	struct smbd_server_connection *sconn = smbreq->sconn;
+	struct notify_mid_map *map;
 
-	for (cnbp=change_notify_list; cnbp; cnbp=next) {
-		next=cnbp->next;
-		/*
-		 * We know it refers to the same directory if the connection number and
-		 * 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_remove(cnbp);
+	for (map = sconn->smb1.notify_mid_maps; map; map = map->next) {
+		if (map->req->req == smbreq) {
+			break;
 		}
 	}
-}
-
-/****************************************************************************
- Set the current change notify timeout to the lowest value across all service
- values.
-****************************************************************************/
 
-void set_change_notify_timeout(int val)
-{
-	if (val > 0) {
-		cnotify->select_time = MIN(cnotify->select_time, val);
+	if (map == NULL) {
+		return;
 	}
-}
 
-/****************************************************************************
- Longest time to sleep for before doing a change notify scan.
-****************************************************************************/
-
-int change_notify_timeout(void)
-{
-	return cnotify->select_time;
+	change_notify_reply(map->req->req,
+			    NT_STATUS_CANCELLED, 0, NULL, map->req->reply_fn);
+	change_notify_remove_request(sconn, map->req);
 }
 
 /****************************************************************************
- Process the change notify queue. Note that this is only called as root.
- Returns True if there are still outstanding change notify requests on the
- queue.
+ Delete entries by fnum from the change notify pending queue.
 *****************************************************************************/
 
-BOOL process_pending_change_notify_queue(time_t t)
-{
-	struct change_notify *cnbp, *next;
-	uint16 vuid;
-
-	for (cnbp=change_notify_list; cnbp; cnbp=next) {
-		next=cnbp->next;
-
-		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);
-			change_notify_remove(cnbp);
-		}
-	}
-
-	return (change_notify_list != NULL);
-}
-
-/****************************************************************************
- Now queue an entry on the notify change list.
- We only need to save smb_size bytes from this incoming packet
- as we will always by returning a 'read the directory yourself'
- error.
-****************************************************************************/
-
-BOOL change_notify_set(char *inbuf, files_struct *fsp, connection_struct *conn,
-		       uint32 flags, uint32 max_param_count)
-{
-	struct change_notify *cnbp;
-
-	if((cnbp = SMB_MALLOC_P(struct change_notify)) == NULL) {
-		DEBUG(0,("change_notify_set: malloc fail !\n" ));
-		return False;
-	}
-
-	ZERO_STRUCTP(cnbp);
-
-	memcpy(cnbp->request_buf, inbuf, smb_size);
-	cnbp->fsp = fsp;
-	cnbp->flags = flags;
-	cnbp->max_param_count = max_param_count;
-	cnbp->change_data = cnotify->register_notify(conn, fsp->fsp_name,
-						     flags);
-	
-	if (!cnbp->change_data) {
-		SAFE_FREE(cnbp);
-		return False;
-	}
-
-	DLIST_ADD(change_notify_list, cnbp);
-
-	/* Push the MID of this packet on the signing queue. */
-	srv_defer_sign_response(SVAL(inbuf,smb_mid));
-
-	return True;
-}
-
-int change_notify_fd(void)
-{
-	if (cnotify) {
-		return cnotify->notification_fd;
-	}
-
-	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)
+void remove_pending_change_notify_requests_by_fid(files_struct *fsp,
+						  NTSTATUS status)
 {
-	DATA_BLOB result;
-	size_t len;
-
-	len = strlen(msg->name);
-
-	result = data_blob(NULL, MSG_NOTIFY_MESSAGE_SIZE + len);
-	if (!result.data) {
-		return result;
+	if (fsp->notify == NULL) {
+		return;
 	}
 
-	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;
+	while (fsp->notify->requests != NULL) {
+		change_notify_reply(fsp->notify->requests->req,
+				    status, 0, NULL,
+				    fsp->notify->requests->reply_fn);
+		change_notify_remove_request(fsp->conn->sconn,
+					     fsp->notify->requests);
 	}
-
-	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)
+void notify_fname(connection_struct *conn, uint32 action, uint32 filter,
+		  const char *path)
 {
-	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);
+	char *fullpath;
+	char *parent;
+	const char *name;
 
-	blob = notify_message_to_buf(&msg);
-	if (blob.data == NULL) {
-		DEBUG(0, ("notify_message_to_buf failed\n"));
-		return;
+	if (path[0] == '.' && path[1] == '/') {
+		path += 2;
 	}
+	if (parent_dirname(talloc_tos(), path, &parent, &name)) {
+		struct smb_filename smb_fname_parent;
 
-	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);
+		ZERO_STRUCT(smb_fname_parent);
+		smb_fname_parent.base_name = parent;
 
-		if (!(tmp = TALLOC_REALLOC_ARRAY(lck, pids, struct process_id,
-						 num_pids+1))) {
-			DEBUG(0, ("realloc failed\n"));
-			break;
+		if (SMB_VFS_STAT(conn, &smb_fname_parent) != -1) {
+			notify_onelevel(conn->notify_ctx, action, filter,
+			    SMB_VFS_FILE_ID_CREATE(conn, &smb_fname_parent.st),
+			    name);
 		}
-		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)) {
+	fullpath = talloc_asprintf(talloc_tos(), "%s/%s", conn->connectpath,
+				   path);
+	if (fullpath == NULL) {
+		DEBUG(0, ("asprintf failed\n"));
 		return;
 	}
-
-	notify_action(conn, parent, name, filter, action);
-	TALLOC_FREE(parent);
+	notify_trigger(conn->notify_ctx, action, filter, fullpath);
+	TALLOC_FREE(fullpath);
 }
 
-static void notify_fsp(files_struct *fsp, struct notify_message *msg)
+static void notify_fsp(files_struct *fsp, uint32 action, const char *name)
 {
 	struct notify_change *change, *changes;
+	char *tmp;
 
 	if (fsp->notify == NULL) {
 		/*
@@ -580,34 +390,41 @@ static void notify_fsp(files_struct *fsp, struct notify_message *msg)
 		return;
 	}
 
-	if ((fsp->notify->requests != NULL)
-	    && (fsp->notify->requests->filter & msg->filter)) {
+	/*
+	 * Someone has triggered a notify previously, queue the change for
+	 * later.
+	 */
+
+	if ((fsp->notify->num_changes > 1000) || (name == NULL)) {
 		/*
-		 * Someone is waiting for the change, trigger the reply
-		 * immediately.
-		 *
-		 * TODO: do we have to walk the lists of requests pending?
+		 * The real number depends on the client buf, just provide a
+		 * guard against a DoS here.  If name == NULL the CN backend is
+		 * alerting us to a problem.  Possibly dropped events.  Clear
+		 * queued changes and send the catch-all response to the client
+		 * if a request is 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);
+		TALLOC_FREE(fsp->notify->changes);
+		fsp->notify->num_changes = -1;
+		if (fsp->notify->requests != NULL) {
+			change_notify_reply(fsp->notify->requests->req,
+					    NT_STATUS_OK,
+					    fsp->notify->requests->max_param,
+					    fsp->notify,
+					    fsp->notify->requests->reply_fn);
+			change_notify_remove_request(fsp->conn->sconn,
+						     fsp->notify->requests);
+		}
 		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 we've exceeded the server side queue or received a NULL name
+	 * from the underlying CN implementation, don't queue up any more
+	 * requests until we can send a catch-all response to the client */
+	if (fsp->notify->num_changes == -1) {
+		return;
+	}
 
-	if (!(changes = TALLOC_REALLOC_ARRAY(
+	if (!(changes = talloc_realloc(
 		      fsp->notify, fsp->notify->changes,
 		      struct notify_change, fsp->notify->num_changes+1))) {
 		DEBUG(0, ("talloc_realloc failed\n"));
@@ -618,59 +435,110 @@ static void notify_fsp(files_struct *fsp, struct notify_message *msg)
 
 	change = &(fsp->notify->changes[fsp->notify->num_changes]);
 
-	if (!(change->name = talloc_strdup(changes, msg->name))) {
+	if (!(tmp = talloc_strdup(changes, name))) {
 		DEBUG(0, ("talloc_strdup failed\n"));
 		return;
 	}
-	change->action = msg->action;
-	fsp->notify->num_changes += 1;
 
-	return;
-}
+	string_replace(tmp, '/', '\\');
+	change->name = tmp;	
 
-static void notify_message_callback(int msgtype, struct process_id pid,
-				    void *buf, size_t len)
-{
-	struct notify_message msg;
-	files_struct *fsp;
+	change->action = action;
+	fsp->notify->num_changes += 1;
 
-	if (!buf_to_notify_message(buf, len, &msg)) {
+	if (fsp->notify->requests == NULL) {
+		/*
+		 * Nobody is waiting, so don't send anything. The ot
+		 */
 		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);
+	if (action == NOTIFY_ACTION_OLD_NAME) {
+		/*
+		 * We have to send the two rename events in one reply. So hold
+		 * the first part back.
+		 */
+		return;
 	}
+
+	/*
+	 * Someone is waiting for the change, trigger the reply immediately.
+	 *
+	 * TODO: do we have to walk the lists of requests pending?
+	 */
+
+	change_notify_reply(fsp->notify->requests->req,
+			    NT_STATUS_OK,
+			    fsp->notify->requests->max_param,
+			    fsp->notify,
+			    fsp->notify->requests->reply_fn);
+
+	change_notify_remove_request(fsp->conn->sconn, fsp->notify->requests);
 }
 
-/****************************************************************************
- Initialise the change notify subsystem.
-****************************************************************************/
+char *notify_filter_string(TALLOC_CTX *mem_ctx, uint32 filter)
+{
+	char *result = NULL;
+
+	result = talloc_strdup(mem_ctx, "");
+
+	if (filter & FILE_NOTIFY_CHANGE_FILE_NAME)
+		result = talloc_asprintf_append(result, "FILE_NAME|");
+	if (filter & FILE_NOTIFY_CHANGE_DIR_NAME)
+		result = talloc_asprintf_append(result, "DIR_NAME|");
+	if (filter & FILE_NOTIFY_CHANGE_ATTRIBUTES)
+		result = talloc_asprintf_append(result, "ATTRIBUTES|");
+	if (filter & FILE_NOTIFY_CHANGE_SIZE)
+		result = talloc_asprintf_append(result, "SIZE|");
+	if (filter & FILE_NOTIFY_CHANGE_LAST_WRITE)
+		result = talloc_asprintf_append(result, "LAST_WRITE|");
+	if (filter & FILE_NOTIFY_CHANGE_LAST_ACCESS)
+		result = talloc_asprintf_append(result, "LAST_ACCESS|");
+	if (filter & FILE_NOTIFY_CHANGE_CREATION)
+		result = talloc_asprintf_append(result, "CREATION|");
+	if (filter & FILE_NOTIFY_CHANGE_EA)
+		result = talloc_asprintf_append(result, "EA|");
+	if (filter & FILE_NOTIFY_CHANGE_SECURITY)
+		result = talloc_asprintf_append(result, "SECURITY|");
+	if (filter & FILE_NOTIFY_CHANGE_STREAM_NAME)
+		result = talloc_asprintf_append(result, "STREAM_NAME|");
+	if (filter & FILE_NOTIFY_CHANGE_STREAM_SIZE)
+		result = talloc_asprintf_append(result, "STREAM_SIZE|");
+	if (filter & FILE_NOTIFY_CHANGE_STREAM_WRITE)
+		result = talloc_asprintf_append(result, "STREAM_WRITE|");
+
+	if (result == NULL) return NULL;
+	if (*result == '\0') return result;
+
+	result[strlen(result)-1] = '\0';
+	return result;
+}
 
-BOOL init_change_notify(void)
+struct sys_notify_context *sys_notify_context_create(connection_struct *conn,
+						     TALLOC_CTX *mem_ctx, 
+						     struct event_context *ev)
 {
-	cnotify = NULL;
-
-#if HAVE_KERNEL_CHANGE_NOTIFY
-	if (cnotify == NULL && lp_kernel_change_notify())
-		cnotify = kernel_notify_init();
-#endif
-#if HAVE_FAM_CHANGE_NOTIFY
-	if (cnotify == NULL && lp_fam_change_notify())
-		cnotify = fam_notify_init();
-#endif
-	if (!cnotify) cnotify = hash_notify_init();
-	
-	if (!cnotify) {
-		DEBUG(0,("Failed to init change notify system\n"));
-		return False;
+	struct sys_notify_context *ctx;
+
+	if (!(ctx = talloc(mem_ctx, struct sys_notify_context))) {
+		DEBUG(0, ("talloc failed\n"));
+		return NULL;
 	}
 
-	message_register(MSG_SMB_NOTIFY, notify_message_callback);
+	ctx->ev = ev;
+	ctx->conn = conn;
+	ctx->private_data = NULL;
+	return ctx;
+}
 
-	return True;
+NTSTATUS sys_notify_watch(struct sys_notify_context *ctx,
+			  struct notify_entry *e,
+			  void (*callback)(struct sys_notify_context *ctx, 
+					   void *private_data,
+					   struct notify_event *ev),
+			  void *private_data, void *handle)
+{
+	return SMB_VFS_NOTIFY_WATCH(ctx->conn, ctx, e, callback, private_data,
+				    handle);
 }
+