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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2007, 2010, Oracle and/or its affiliates.
* Copyright 2018 Nexenta Systems, Inc. All rights reserved.
*/
/*
* Dispatch function for SMB2_CHANGE_NOTIFY
*/
#include <smbsrv/smb2_kproto.h>
/* For the output DataOffset fields in here. */
#define DATA_OFF (SMB2_HDR_SIZE + 8)
smb_sdrc_t
smb2_change_notify(smb_request_t *sr)
{
uint16_t StructSize;
uint16_t iFlags;
uint32_t oBufLength;
smb2fid_t smb2fid;
uint32_t CompletionFilter;
uint32_t reserved;
uint32_t status;
int rc = 0;
/*
* SMB2 Change Notify request
*/
rc = smb_mbc_decodef(
&sr->smb_data, "wwlqqll",
&StructSize, /* w */
&iFlags, /* w */
&oBufLength, /* l */
&smb2fid.persistent, /* q */
&smb2fid.temporal, /* q */
&CompletionFilter, /* l */
&reserved); /* l */
if (rc || StructSize != 32)
return (SDRC_ERROR);
status = smb2sr_lookup_fid(sr, &smb2fid);
DTRACE_SMB2_START(op__ChangeNotify, smb_request_t *, sr);
if (status != 0)
goto errout; /* Bad FID */
/*
* Only deal with change notify last in a compound,
* because it blocks indefinitely. This status gets
* "sticky" handling in smb2sr_work().
*/
if (sr->smb2_next_command != 0) {
status = NT_STATUS_INSUFFICIENT_RESOURCES;
goto errout;
}
CompletionFilter &= FILE_NOTIFY_VALID_MASK;
if (iFlags & SMB2_WATCH_TREE)
CompletionFilter |= FILE_NOTIFY_CHANGE_EV_SUBDIR;
if (oBufLength > smb2_max_trans)
oBufLength = smb2_max_trans;
/*
* Check for events and consume, non-blocking.
* Special return STATUS_PENDING means:
* No events; caller must call "act2" next.
* SMB2 does that in "async mode".
*/
status = smb_notify_act1(sr, oBufLength, CompletionFilter);
if (status == NT_STATUS_PENDING) {
status = smb2sr_go_async(sr);
if (status != 0)
goto errout;
status = smb_notify_act2(sr);
if (status == NT_STATUS_PENDING) {
/* See next: smb2_change_notify_finish */
return (SDRC_SR_KEPT);
}
}
errout:
sr->smb2_status = status;
DTRACE_SMB2_DONE(op__ChangeNotify, smb_request_t *, sr);
if (NT_SC_SEVERITY(status) == NT_STATUS_SEVERITY_SUCCESS) {
oBufLength = sr->raw_data.chain_offset;
(void) smb_mbc_encodef(
&sr->reply, "wwlC",
9, /* StructSize */ /* w */
DATA_OFF, /* w */
oBufLength, /* l */
&sr->raw_data); /* C */
} else {
smb2sr_put_error(sr, status);
}
return (SDRC_SUCCESS);
}
/*
* This is called via taskq_dispatch in smb_notify.c
* to finish up an NT transact notify change request.
* Build an SMB2 Change Notify reply and send it.
*/
void
smb2_change_notify_finish(void *arg)
{
smb_request_t *sr = arg;
smb_disp_stats_t *sds;
uint32_t status;
uint32_t oBufLength;
SMB_REQ_VALID(sr);
/*
* Common part of notify, puts data in sr->raw_data
*/
status = smb_notify_act3(sr);
/*
* The prior thread returned SDRC_SR_KEPT and skiped
* the dtrace DONE probe, so fire that here.
*/
sr->smb2_status = status;
DTRACE_SMB2_DONE(op__ChangeNotify, smb_request_t *, sr);
if (NT_SC_SEVERITY(status) == NT_STATUS_SEVERITY_SUCCESS) {
oBufLength = sr->raw_data.chain_offset;
(void) smb_mbc_encodef(
&sr->reply, "wwlC",
9, /* StructSize */ /* w */
DATA_OFF, /* w */
oBufLength, /* l */
&sr->raw_data); /* C */
} else {
smb2sr_put_error(sr, status);
}
/*
* Record some statistics: (just tx bytes here)
*/
sds = &sr->session->s_server->sv_disp_stats2[SMB2_CHANGE_NOTIFY];
atomic_add_64(&sds->sdt_txb, (int64_t)(sr->reply.chain_offset));
/*
* Put (overwrite) the final SMB2 header,
* sign, send.
*/
(void) smb2_encode_header(sr, B_TRUE);
if (sr->smb2_hdr_flags & SMB2_FLAGS_SIGNED)
smb2_sign_reply(sr);
smb2_send_reply(sr);
mutex_enter(&sr->sr_mutex);
sr->sr_state = SMB_REQ_STATE_COMPLETED;
mutex_exit(&sr->sr_mutex);
smb_request_free(sr);
}
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