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,
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"
-
-/* Max size we can send to client in a notify response. */
-extern int max_send;
+#include "smbd/globals.h"
struct notify_change_request {
struct notify_change_request *prev, *next;
struct files_struct *fsp; /* backpointer for cancel by mid */
- char request_buf[smb_size];
+ struct smb_request *req;
uint32 filter;
- uint32 current_bufsize;
+ 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);
-static struct notify_mid_map *notify_changes_by_mid;
-
/*
* For NTCancel, we need to find the notify_change_request indexed by
* mid. Separate list here.
uint16 mid;
};
-static BOOL notify_marshall_changes(int num_changes,
- struct notify_change *changes,
- prs_struct *ps)
+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(int num_changes,
+ uint32 max_offset,
+ struct notify_change *changes,
+ prs_struct *ps)
{
int i;
UNISTR uni_name;
+ if (num_changes == -1) {
+ return false;
+ }
+
+ uni_name.buffer = NULL;
+
for (i=0; i<num_changes; i++) {
- struct notify_change *c = &changes[i];
+ struct notify_change *c;
size_t namelen;
+ int rem = 0;
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)) {
+ /* Coalesce any identical records. */
+ while (i+1 < num_changes &&
+ notify_change_record_identical(&changes[i],
+ &changes[i+1])) {
+ i++;
+ }
+
+ c = &changes[i];
+
+ if (!convert_string_talloc(talloc_tos(), CH_UNIX, CH_UTF16LE,
+ c->name, strlen(c->name)+1, &uni_name.buffer,
+ &namelen, True) || (uni_name.buffer == NULL)) {
goto fail;
}
*/
u32_tmp = (i == num_changes-1) ? 0 : namelen + 12;
+
+ /* Align on 4-byte boundary according to MS-CIFS 2.2.7.4.2 */
+ if ((rem = u32_tmp % 4 ) != 0)
+ u32_tmp += 4 - rem;
+
if (!prs_uint32("offset", ps, 1, &u32_tmp)) goto fail;
u32_tmp = c->action;
*/
prs_set_offset(ps, prs_offset(ps)-2);
- SAFE_FREE(uni_name.buffer);
+ if (rem != 0) {
+ if (!prs_align_custom(ps, 4)) goto fail;
+ }
+
+ TALLOC_FREE(uni_name.buffer);
+
+ if (prs_offset(ps) > max_offset) {
+ /* Too much data for client. */
+ DEBUG(10, ("Client only wanted %d bytes, trying to "
+ "marshall %d bytes\n", (int)max_offset,
+ (int)prs_offset(ps)));
+ return False;
+ }
}
return True;
fail:
- SAFE_FREE(uni_name.buffer);
+ TALLOC_FREE(uni_name.buffer);
return False;
}
Setup the common parts of the return packet and send it.
*****************************************************************************/
-static void change_notify_reply_packet(const char *request_buf,
- NTSTATUS error_code)
+void change_notify_reply(connection_struct *conn,
+ 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))
{
- const char *inbuf = request_buf;
- char outbuf[smb_size+38];
-
- memset(outbuf, '\0', sizeof(outbuf));
- construct_reply_common(request_buf, outbuf);
-
- ERROR_NT(error_code);
-
- /*
- * Seems NT needs a transact command with an error code
- * in it. This is a longer packet than a simple error.
- */
- set_message(inbuf,outbuf,18,0,False);
-
- show_msg(outbuf);
- if (!send_smb(smbd_server_fd(),outbuf))
- exit_server_cleanly("change_notify_reply_packet: send_smb "
- "failed.");
-}
-
-void change_notify_reply(const char *request_buf,
- struct notify_change_buf *notify_buf)
-{
- char *outbuf = NULL;
prs_struct ps;
- size_t buflen;
- if (notify_buf->num_changes == -1) {
- change_notify_reply_packet(request_buf, NT_STATUS_OK);
+ if (!NT_STATUS_IS_OK(error_code)) {
+ reply_fn(req, error_code, NULL, 0);
return;
}
- if (!prs_init(&ps, 0, NULL, False)
- || !notify_marshall_changes(notify_buf->num_changes,
- notify_buf->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;
}
- buflen = smb_size+38+prs_offset(&ps) + 4 /* padding */;
+ prs_init_empty(&ps, NULL, MARSHALL);
- if (buflen > max_send) {
+ if (!notify_marshall_changes(notify_buf->num_changes, max_param,
+ notify_buf->changes, &ps)) {
/*
* We exceed what the client is willing to accept. Send
* nothing.
*/
- change_notify_reply_packet(request_buf, NT_STATUS_OK);
- goto done;
+ prs_mem_free(&ps);
+ prs_init_empty(&ps, NULL, MARSHALL);
}
- 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(request_buf, outbuf, buflen, NT_STATUS_OK, prs_data_p(&ps),
- prs_offset(&ps), NULL, 0) == -1) {
- exit_server("change_notify_reply_packet: send_smb failed.");
- }
+ reply_fn(req, NT_STATUS_OK, (uint8_t *)prs_data_p(&ps), prs_offset(&ps));
- done:
- SAFE_FREE(outbuf);
prs_mem_free(&ps);
TALLOC_FREE(notify_buf->changes);
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->fsp_name));
+ DEBUG(10, ("notify_callback called for %s\n", fsp_str_dbg(fsp)));
notify_fsp(fsp, e->action, e->path);
}
NTSTATUS change_notify_create(struct files_struct *fsp, uint32 filter,
- BOOL recursive)
+ bool recursive)
{
char *fullpath;
struct notify_entry e;
return NT_STATUS_NO_MEMORY;
}
+ /* Do notify operations on the base_name. */
if (asprintf(&fullpath, "%s/%s", fsp->conn->connectpath,
- fsp->fsp_name) == -1) {
+ 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) {
return status;
}
-NTSTATUS change_notify_add_request(const char *inbuf,
- uint32 filter, BOOL recursive,
- 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 = smbd_server_conn;
- if (!(request = SMB_MALLOC_P(struct notify_change_request))
- || !(map = SMB_MALLOC_P(struct notify_mid_map))) {
- SAFE_FREE(request);
+ DEBUG(10, ("change_notify_add_request: Adding request for %s: "
+ "max_param = %d\n", fsp_str_dbg(fsp), (int)max_param));
+
+ 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->current_bufsize = 0;
+ 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;
}
{
files_struct *fsp;
struct notify_change_request *req;
+ struct smbd_server_connection *sconn = smbd_server_conn;
/*
* Paranoia checks, the fsp referenced must must have the request in
}
DLIST_REMOVE(fsp->notify->requests, req);
- DLIST_REMOVE(notify_changes_by_mid, req->mid_map);
- SAFE_FREE(req->mid_map);
- TALLOC_FREE(req->backend_data);
- SAFE_FREE(req);
+ DLIST_REMOVE(sconn->smb1.notify_mid_maps, req->mid_map);
+ TALLOC_FREE(req);
}
/****************************************************************************
void remove_pending_change_notify_requests_by_mid(uint16 mid)
{
struct notify_mid_map *map;
+ struct smbd_server_connection *sconn = smbd_server_conn;
- 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;
}
return;
}
- change_notify_reply_packet(map->req->request_buf, NT_STATUS_CANCELLED);
+ change_notify_reply(map->req->fsp->conn, map->req->req,
+ NT_STATUS_CANCELLED, 0, NULL, map->req->reply_fn);
+ change_notify_remove_request(map->req);
+}
+
+void smbd_notify_cancel_by_smbreq(struct smbd_server_connection *sconn,
+ const struct smb_request *smbreq)
+{
+ struct notify_mid_map *map;
+
+ for (map = sconn->smb1.notify_mid_maps; map; map = map->next) {
+ if (map->req->req == smbreq) {
+ break;
+ }
+ }
+
+ if (map == NULL) {
+ return;
+ }
+
+ change_notify_reply(map->req->fsp->conn, map->req->req,
+ NT_STATUS_CANCELLED, 0, NULL, map->req->reply_fn);
change_notify_remove_request(map->req);
}
}
while (fsp->notify->requests != NULL) {
- change_notify_reply_packet(
- fsp->notify->requests->request_buf, status);
+ change_notify_reply(fsp->conn, fsp->notify->requests->req,
+ status, 0, NULL,
+ fsp->notify->requests->reply_fn);
change_notify_remove_request(fsp->notify->requests);
}
}
+static void notify_parent_dir(connection_struct *conn,
+ uint32 action, uint32 filter,
+ const char *path)
+{
+ struct smb_filename smb_fname_parent;
+ char *parent;
+ const char *name;
+ char *oldwd;
+
+ if (!parent_dirname(talloc_tos(), path, &parent, &name)) {
+ DEBUG(1, ("Can't get parent dirname, giving up\n"));
+ return;
+ }
+
+ ZERO_STRUCT(smb_fname_parent);
+ smb_fname_parent.base_name = parent;
+
+ oldwd = vfs_GetWd(parent, conn);
+ if (oldwd == NULL) {
+ DEBUG(1, ("vfs_GetWd failed!\n"));
+ goto done;
+ }
+ if (vfs_ChDir(conn, conn->connectpath) == -1) {
+ DEBUG(1, ("Could not chdir to connect path!\n"));
+ goto done;
+ }
+
+ if (SMB_VFS_STAT(conn, &smb_fname_parent) == -1) {
+ goto chdir_done;
+ }
+
+ notify_onelevel(conn->notify_ctx, action, filter,
+ SMB_VFS_FILE_ID_CREATE(conn, &smb_fname_parent.st),
+ name);
+chdir_done:
+ vfs_ChDir(conn, oldwd);
+done:
+ TALLOC_FREE(parent);
+}
+
void notify_fname(connection_struct *conn, uint32 action, uint32 filter,
const char *path)
{
- char *fullpath;
+ char *fullpath = NULL;
- if (asprintf(&fullpath, "%s/%s", conn->connectpath, path) == -1) {
+ if (path[0] == '.' && path[1] == '/') {
+ path += 2;
+ }
+ notify_parent_dir(conn, action, filter, path);
+
+ fullpath = talloc_asprintf(talloc_tos(), "%s/%s", conn->connectpath,
+ path);
+ if (fullpath == NULL) {
DEBUG(0, ("asprintf failed\n"));
return;
}
-
notify_trigger(conn->notify_ctx, action, filter, fullpath);
- SAFE_FREE(fullpath);
+ TALLOC_FREE(fullpath);
}
static void notify_fsp(files_struct *fsp, uint32 action, const char *name)
if ((fsp->notify->num_changes > 1000) || (name == NULL)) {
/*
* The real number depends on the client buf, just provide a
- * guard against a DoS here.
+ * 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.
*/
TALLOC_FREE(fsp->notify->changes);
fsp->notify->num_changes = -1;
+ if (fsp->notify->requests != NULL) {
+ change_notify_reply(fsp->conn,
+ fsp->notify->requests->req,
+ NT_STATUS_OK,
+ fsp->notify->requests->max_param,
+ fsp->notify,
+ fsp->notify->requests->reply_fn);
+ change_notify_remove_request(fsp->notify->requests);
+ }
return;
}
+ /* 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;
}
* TODO: do we have to walk the lists of requests pending?
*/
- change_notify_reply(fsp->notify->requests->request_buf,
- fsp->notify);
+ change_notify_reply(fsp->conn,
+ fsp->notify->requests->req,
+ NT_STATUS_OK,
+ fsp->notify->requests->max_param,
+ fsp->notify,
+ fsp->notify->requests->reply_fn);
change_notify_remove_request(fsp->notify->requests);
}
git.samba.org / samba.git / blobdiff