1 /*
2 * This file and its contents are supplied under the terms of the
3 * Common Development and Distribution License ("CDDL"), version 1.0.
4 * You may only use this file in accordance with the terms of version
5 * 1.0 of the CDDL.
6 *
7 * A full copy of the text of the CDDL should have accompanied this
8 * source. A copy of the CDDL is also available via the Internet at
9 * http://www.illumos.org/license/CDDL.
10 */
11
12 /*
13 * Copyright 2014 Nexenta Systems, Inc. All rights reserved.
14 */
15
16 /*
17 * Dispatch function for SMB2_OPLOCK_BREAK
18 */
19
20 #include <smbsrv/smb2_kproto.h>
21
22 /*
23 * SMB2 Oplock Break Acknowledgement
24 * [MS-SMB2 2.2.24]
25 */
26 smb_sdrc_t
smb2_oplock_break_ack(smb_request_t * sr)27 smb2_oplock_break_ack(smb_request_t *sr)
28 {
29 smb_node_t *node;
30 smb2fid_t smb2fid;
31 uint32_t status;
32 uint16_t StructSize;
33 uint8_t OplockLevel;
34 uint8_t brk;
35 int rc = 0;
36
37 /*
38 * Decode the SMB2 Oplock Break Ack.
39 */
40 rc = smb_mbc_decodef(
41 &sr->smb_data, "wb5.qq",
42 &StructSize, /* w */
43 &OplockLevel, /* b */
44 /* reserved 5. */
45 &smb2fid.persistent, /* q */
46 &smb2fid.temporal); /* q */
47 if (rc || StructSize != 24)
48 return (SDRC_ERROR);
49
50 status = smb2sr_lookup_fid(sr, &smb2fid);
51 if (status)
52 goto errout;
53 if ((node = sr->fid_ofile->f_node) == NULL) {
54 /* Not a regular file */
55 status = NT_STATUS_INVALID_PARAMETER;
56 goto errout;
57 }
58
59 /*
60 * Process the oplock break ack. We only expect levels
61 * at or below the hightest break levels we send, which is
62 * currently SMB2_OPLOCK_LEVEL_II.
63 */
64 switch (OplockLevel) {
65 case SMB2_OPLOCK_LEVEL_NONE: /* 0x00 */
66 brk = SMB_OPLOCK_BREAK_TO_NONE;
67 break;
68
69 case SMB2_OPLOCK_LEVEL_II: /* 0x01 */
70 brk = SMB_OPLOCK_BREAK_TO_LEVEL_II;
71 break;
72
73 /* We don't break to these levels (yet). */
74 case SMB2_OPLOCK_LEVEL_EXCLUSIVE: /* 0x08 */
75 case SMB2_OPLOCK_LEVEL_BATCH: /* 0x09 */
76 case SMB2_OPLOCK_LEVEL_LEASE: /* 0xFF */
77 default: /* gcc -Wuninitialized */
78 status = NT_STATUS_INVALID_PARAMETER;
79 goto errout;
80 }
81
82 smb_oplock_ack(node, sr->fid_ofile, brk);
83
84 /*
85 * Generate SMB2 Oplock Break response
86 * [MS-SMB2] 2.2.25
87 */
88 StructSize = 24;
89 (void) smb_mbc_encodef(
90 &sr->reply, "wb5.qq",
91 StructSize, /* w */
92 OplockLevel, /* b */
93 /* reserved 5. */
94 smb2fid.persistent, /* q */
95 smb2fid.temporal); /* q */
96 return (SDRC_SUCCESS);
97
98 errout:
99 smb2sr_put_error(sr, status);
100 return (SDRC_SUCCESS);
101 }
102
103 /*
104 * Compose an SMB2 Oplock Break Notification packet, including
105 * the SMB2 header and everything, in sr->reply.
106 * The caller will send it and free the request.
107 */
108 void
smb2_oplock_break_notification(smb_request_t * sr,uint8_t brk)109 smb2_oplock_break_notification(smb_request_t *sr, uint8_t brk)
110 {
111 smb_ofile_t *ofile = sr->fid_ofile;
112 smb2fid_t smb2fid;
113 uint16_t StructSize;
114 uint8_t OplockLevel;
115
116 switch (brk) {
117 default:
118 ASSERT(0);
119 /* FALLTHROUGH */
120 case SMB_OPLOCK_BREAK_TO_NONE:
121 OplockLevel = SMB2_OPLOCK_LEVEL_NONE;
122 break;
123 case SMB_OPLOCK_BREAK_TO_LEVEL_II:
124 OplockLevel = SMB2_OPLOCK_LEVEL_II;
125 break;
126 }
127
128 /*
129 * SMB2 Header
130 */
131 sr->smb2_cmd_code = SMB2_OPLOCK_BREAK;
132 sr->smb2_hdr_flags = SMB2_FLAGS_SERVER_TO_REDIR;
133 sr->smb_tid = ofile->f_tree->t_tid;
134 sr->smb_pid = 0;
135 sr->smb_uid = 0;
136 sr->smb2_messageid = UINT64_MAX;
137 (void) smb2_encode_header(sr, B_FALSE);
138
139 /*
140 * SMB2 Oplock Break, variable part
141 */
142 StructSize = 24;
143 smb2fid.persistent = 0;
144 smb2fid.temporal = ofile->f_fid;
145 (void) smb_mbc_encodef(
146 &sr->reply, "wb5.qq",
147 StructSize, /* w */
148 OplockLevel, /* b */
149 /* reserved 5. */
150 smb2fid.persistent, /* q */
151 smb2fid.temporal); /* q */
152 }
153