smb2_change_notify.c revision a90cf9f29973990687fa61de9f1f6ea22e924e40
1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22/*
23 * Copyright (c) 2007, 2010, Oracle and/or its affiliates.
24 * Copyright 2014 Nexenta Systems, Inc.  All rights reserved.
25 */
26
27/*
28 * Dispatch function for SMB2_CHANGE_NOTIFY
29 */
30
31#include <smbsrv/smb2_kproto.h>
32
33static smb_sdrc_t smb2_change_notify_async(smb_request_t *);
34
35smb_sdrc_t
36smb2_change_notify(smb_request_t *sr)
37{
38	smb_node_t *node = NULL;
39	uint16_t StructSize;
40	uint16_t iFlags;
41	uint32_t oBufLength;
42	smb2fid_t smb2fid;
43	uint32_t CompletionFilter;
44	uint32_t reserved;
45	uint32_t status;
46	int rc = 0;
47
48	/*
49	 * SMB2 Change Notify request
50	 */
51	rc = smb_mbc_decodef(
52	    &sr->smb_data,		"wwlqqll",
53	    &StructSize,		/* w */
54	    &iFlags,			/* w */
55	    &oBufLength,		/* l */
56	    &smb2fid.persistent,	/* q */
57	    &smb2fid.temporal,		/* q */
58	    &CompletionFilter,		/* l */
59	    &reserved);			/* l */
60	if (rc || StructSize != 32)
61		return (SDRC_ERROR);
62
63	status = smb2sr_lookup_fid(sr, &smb2fid);
64	if (status)
65		goto puterror;
66
67	node = sr->fid_ofile->f_node;
68	if (node == NULL || !smb_node_is_dir(node)) {
69		status = NT_STATUS_INVALID_PARAMETER;
70		goto puterror;
71	}
72
73	/*
74	 * Let Change Notify "go async", because it
75	 * may block indefinitely.
76	 */
77	status = smb2sr_go_async(sr, smb2_change_notify_async);
78puterror:
79	ASSERT(status != 0);
80	smb2sr_put_error(sr, status);
81	return (SDRC_SUCCESS);
82}
83
84static smb_sdrc_t
85smb2_change_notify_async(smb_request_t *sr)
86{
87	uint16_t StructSize;
88	uint16_t iFlags;
89	uint32_t oBufLength;
90	smb2fid_t smb2fid;
91	uint32_t CompletionFilter;
92	uint32_t reserved;
93	uint32_t status;
94	uint16_t DataOff;
95	int rc = 0;
96
97	/*
98	 * SMB2 Change Notify request
99	 */
100	rc = smb_mbc_decodef(
101	    &sr->smb_data,		"wwlqqll",
102	    &StructSize,		/* w */
103	    &iFlags,			/* w */
104	    &oBufLength,		/* l */
105	    &smb2fid.persistent,	/* q */
106	    &smb2fid.temporal,		/* q */
107	    &CompletionFilter,		/* l */
108	    &reserved);			/* l */
109	if (rc || StructSize != 32)
110		return (SDRC_ERROR);
111
112	status = smb2sr_lookup_fid(sr, &smb2fid);
113	if (status != 0) {
114		smb2sr_put_error(sr, status);
115		return (SDRC_SUCCESS);
116	}
117
118	CompletionFilter &= FILE_NOTIFY_VALID_MASK;
119	if (iFlags & SMB2_WATCH_TREE)
120		CompletionFilter |= NODE_FLAGS_WATCH_TREE;
121
122	if (oBufLength > smb2_max_trans)
123		oBufLength = smb2_max_trans;
124	sr->raw_data.max_bytes = oBufLength;
125
126	status = smb_notify_common(sr, &sr->raw_data, CompletionFilter);
127	if (status != 0) {
128		smb2sr_put_error(sr, status);
129		return (SDRC_SUCCESS);
130	}
131
132	/*
133	 * SMB2 Change Notify reply
134	 */
135	DataOff = SMB2_HDR_SIZE + 8;
136	oBufLength = MBC_LENGTH(&sr->raw_data);
137	rc = smb_mbc_encodef(
138	    &sr->reply, "wwlC",
139	    9,	/* StructSize */	/* w */
140	    DataOff,			/* w */
141	    oBufLength,			/* l */
142	    &sr->raw_data);		/* C */
143	if (rc)
144		return (SDRC_ERROR);
145
146	return (SDRC_SUCCESS);
147}
148