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samba-mirror/source3/smbd/smb2_notify.c
Volker Lendecke a8cb1b1004 smbd: Avoid calling notify_filter_string for low debuglevels
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>

Autobuild-User(master): Andreas Schneider <asn@cryptomilk.org>
Autobuild-Date(master): Wed Dec  4 20:09:39 CET 2013 on sn-devel-104
2013-12-04 20:09:39 +01:00

335 lines
9.0 KiB
C

/*
Unix SMB/CIFS implementation.
Core SMB2 server
Copyright (C) Stefan Metzmacher 2009
Copyright (C) Jeremy Allison 2010
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 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "smbd/smbd.h"
#include "smbd/globals.h"
#include "../libcli/smb/smb_common.h"
#include "../lib/util/tevent_ntstatus.h"
struct smbd_smb2_notify_state {
struct smbd_smb2_request *smb2req;
struct smb_request *smbreq;
NTSTATUS status;
DATA_BLOB out_output_buffer;
};
static struct tevent_req *smbd_smb2_notify_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct smbd_smb2_request *smb2req,
struct files_struct *in_fsp,
uint16_t in_flags,
uint32_t in_output_buffer_length,
uint64_t in_completion_filter);
static NTSTATUS smbd_smb2_notify_recv(struct tevent_req *req,
TALLOC_CTX *mem_ctx,
DATA_BLOB *out_output_buffer);
static void smbd_smb2_request_notify_done(struct tevent_req *subreq);
NTSTATUS smbd_smb2_request_process_notify(struct smbd_smb2_request *req)
{
NTSTATUS status;
const uint8_t *inbody;
uint16_t in_flags;
uint32_t in_output_buffer_length;
uint64_t in_file_id_persistent;
uint64_t in_file_id_volatile;
struct files_struct *in_fsp;
uint64_t in_completion_filter;
struct tevent_req *subreq;
status = smbd_smb2_request_verify_sizes(req, 0x20);
if (!NT_STATUS_IS_OK(status)) {
return smbd_smb2_request_error(req, status);
}
inbody = SMBD_SMB2_IN_BODY_PTR(req);
in_flags = SVAL(inbody, 0x02);
in_output_buffer_length = IVAL(inbody, 0x04);
in_file_id_persistent = BVAL(inbody, 0x08);
in_file_id_volatile = BVAL(inbody, 0x10);
in_completion_filter = IVAL(inbody, 0x18);
/*
* 0x00010000 is what Windows 7 uses,
* Windows 2008 uses 0x00080000
*/
if (in_output_buffer_length > req->sconn->smb2.max_trans) {
return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
}
status = smbd_smb2_request_verify_creditcharge(req,
in_output_buffer_length);
if (!NT_STATUS_IS_OK(status)) {
return smbd_smb2_request_error(req, status);
}
in_fsp = file_fsp_smb2(req, in_file_id_persistent, in_file_id_volatile);
if (in_fsp == NULL) {
return smbd_smb2_request_error(req, NT_STATUS_FILE_CLOSED);
}
subreq = smbd_smb2_notify_send(req, req->sconn->ev_ctx,
req, in_fsp,
in_flags,
in_output_buffer_length,
in_completion_filter);
if (subreq == NULL) {
return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
}
tevent_req_set_callback(subreq, smbd_smb2_request_notify_done, req);
return smbd_smb2_request_pending_queue(req, subreq, 500);
}
static void smbd_smb2_request_notify_done(struct tevent_req *subreq)
{
struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
struct smbd_smb2_request);
DATA_BLOB outbody;
DATA_BLOB outdyn;
uint16_t out_output_buffer_offset;
DATA_BLOB out_output_buffer = data_blob_null;
NTSTATUS status;
NTSTATUS error; /* transport error */
status = smbd_smb2_notify_recv(subreq,
req,
&out_output_buffer);
TALLOC_FREE(subreq);
if (!NT_STATUS_IS_OK(status)) {
error = smbd_smb2_request_error(req, status);
if (!NT_STATUS_IS_OK(error)) {
smbd_server_connection_terminate(req->sconn,
nt_errstr(error));
return;
}
return;
}
out_output_buffer_offset = SMB2_HDR_BODY + 0x08;
outbody = data_blob_talloc(req->out.vector, NULL, 0x08);
if (outbody.data == NULL) {
error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
if (!NT_STATUS_IS_OK(error)) {
smbd_server_connection_terminate(req->sconn,
nt_errstr(error));
return;
}
return;
}
SSVAL(outbody.data, 0x00, 0x08 + 1); /* struct size */
SSVAL(outbody.data, 0x02,
out_output_buffer_offset); /* output buffer offset */
SIVAL(outbody.data, 0x04,
out_output_buffer.length); /* output buffer length */
outdyn = out_output_buffer;
error = smbd_smb2_request_done(req, outbody, &outdyn);
if (!NT_STATUS_IS_OK(error)) {
smbd_server_connection_terminate(req->sconn,
nt_errstr(error));
return;
}
}
static void smbd_smb2_notify_reply(struct smb_request *smbreq,
NTSTATUS error_code,
uint8_t *buf, size_t len);
static bool smbd_smb2_notify_cancel(struct tevent_req *req);
static struct tevent_req *smbd_smb2_notify_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct smbd_smb2_request *smb2req,
struct files_struct *fsp,
uint16_t in_flags,
uint32_t in_output_buffer_length,
uint64_t in_completion_filter)
{
struct tevent_req *req;
struct smbd_smb2_notify_state *state;
struct smb_request *smbreq;
connection_struct *conn = smb2req->tcon->compat;
bool recursive = (in_flags & SMB2_WATCH_TREE) ? true : false;
NTSTATUS status;
req = tevent_req_create(mem_ctx, &state,
struct smbd_smb2_notify_state);
if (req == NULL) {
return NULL;
}
state->smb2req = smb2req;
state->status = NT_STATUS_INTERNAL_ERROR;
state->out_output_buffer = data_blob_null;
DEBUG(10,("smbd_smb2_notify_send: %s - %s\n",
fsp_str_dbg(fsp), fsp_fnum_dbg(fsp)));
smbreq = smbd_smb2_fake_smb_request(smb2req);
if (tevent_req_nomem(smbreq, req)) {
return tevent_req_post(req, ev);
}
state->smbreq = smbreq;
smbreq->async_priv = (void *)req;
if (DEBUGLEVEL >= 3) {
char *filter_string;
filter_string = notify_filter_string(NULL, in_completion_filter);
if (tevent_req_nomem(filter_string, req)) {
return tevent_req_post(req, ev);
}
DEBUG(3,("smbd_smb2_notify_send: notify change "
"called on %s, filter = %s, recursive = %d\n",
fsp_str_dbg(fsp), filter_string, recursive));
TALLOC_FREE(filter_string);
}
if ((!fsp->is_directory) || (conn != fsp->conn)) {
tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
return tevent_req_post(req, ev);
}
if (fsp->notify == NULL) {
status = change_notify_create(fsp,
in_completion_filter,
recursive);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(10, ("change_notify_create returned %s\n",
nt_errstr(status)));
tevent_req_nterror(req, status);
return tevent_req_post(req, ev);
}
}
if (change_notify_fsp_has_changes(fsp)) {
/*
* We've got changes pending, respond immediately
*/
/*
* TODO: write a torture test to check the filtering behaviour
* here.
*/
change_notify_reply(smbreq,
NT_STATUS_OK,
in_output_buffer_length,
fsp->notify,
smbd_smb2_notify_reply);
/*
* change_notify_reply() above has independently
* called tevent_req_done().
*/
return tevent_req_post(req, ev);
}
/*
* No changes pending, queue the request
*/
status = change_notify_add_request(smbreq,
in_output_buffer_length,
in_completion_filter,
recursive, fsp,
smbd_smb2_notify_reply);
if (!NT_STATUS_IS_OK(status)) {
tevent_req_nterror(req, status);
return tevent_req_post(req, ev);
}
/* allow this request to be canceled */
tevent_req_set_cancel_fn(req, smbd_smb2_notify_cancel);
return req;
}
static void smbd_smb2_notify_reply(struct smb_request *smbreq,
NTSTATUS error_code,
uint8_t *buf, size_t len)
{
struct tevent_req *req = talloc_get_type_abort(smbreq->async_priv,
struct tevent_req);
struct smbd_smb2_notify_state *state = tevent_req_data(req,
struct smbd_smb2_notify_state);
state->status = error_code;
if (!NT_STATUS_IS_OK(error_code)) {
/* nothing */
} else if (len == 0) {
state->status = STATUS_NOTIFY_ENUM_DIR;
} else {
state->out_output_buffer = data_blob_talloc(state, buf, len);
if (state->out_output_buffer.data == NULL) {
state->status = NT_STATUS_NO_MEMORY;
}
}
tevent_req_defer_callback(req, state->smb2req->sconn->ev_ctx);
if (!NT_STATUS_IS_OK(state->status)) {
tevent_req_nterror(req, state->status);
return;
}
tevent_req_done(req);
}
static bool smbd_smb2_notify_cancel(struct tevent_req *req)
{
struct smbd_smb2_notify_state *state = tevent_req_data(req,
struct smbd_smb2_notify_state);
smbd_notify_cancel_by_smbreq(state->smbreq);
return true;
}
static NTSTATUS smbd_smb2_notify_recv(struct tevent_req *req,
TALLOC_CTX *mem_ctx,
DATA_BLOB *out_output_buffer)
{
NTSTATUS status;
struct smbd_smb2_notify_state *state = tevent_req_data(req,
struct smbd_smb2_notify_state);
if (tevent_req_is_nterror(req, &status)) {
tevent_req_received(req);
return status;
}
*out_output_buffer = state->out_output_buffer;
talloc_steal(mem_ctx, out_output_buffer->data);
tevent_req_received(req);
return NT_STATUS_OK;
}