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_WRITE
18 */
19
20 #include <smbsrv/smb2_kproto.h>
21 #include <smbsrv/smb_fsops.h>
22
23 smb_sdrc_t
24 smb2_write(smb_request_t *sr)
25 {
26 smb_ofile_t *of = NULL;
27 smb_vdb_t *vdb = NULL;
28 uint16_t StructSize;
29 uint16_t DataOff;
30 uint32_t Length;
31 uint64_t Offset;
32 smb2fid_t smb2fid;
33 uint32_t Channel;
34 uint32_t Remaining;
35 uint16_t ChanInfoOffset;
36 uint16_t ChanInfoLength;
37 uint32_t Flags;
38 uint32_t XferCount;
39 uint32_t status;
40 int data_chain_off, skip;
41 int stability = 0;
42 int rc = 0;
43
44 /*
45 * SMB2 Write request
46 */
47 rc = smb_mbc_decodef(
48 &sr->smb_data,
49 "wwlqqqllwwl",
50 &StructSize, /* w */
51 &DataOff, /* w */
52 &Length, /* l */
53 &Offset, /* q */
54 &smb2fid.persistent, /* q */
55 &smb2fid.temporal, /* q */
56 &Channel, /* l */
57 &Remaining, /* l */
58 &ChanInfoOffset, /* w */
59 &ChanInfoLength, /* w */
60 &Flags); /* l */
61 if (rc)
62 return (SDRC_ERROR);
63 if (StructSize != 49)
64 return (SDRC_ERROR);
65
66 status = smb2sr_lookup_fid(sr, &smb2fid);
67 if (status) {
68 smb2sr_put_error(sr, status);
69 return (SDRC_SUCCESS);
70 }
71 of = sr->fid_ofile;
72
73 if (Length > smb2_max_rwsize) {
74 smb2sr_put_error(sr, NT_STATUS_INVALID_PARAMETER);
75 return (SDRC_SUCCESS);
76 }
77
78 /*
79 * Skip any padding before the write data.
80 */
81 data_chain_off = sr->smb2_cmd_hdr + DataOff;
82 skip = data_chain_off - sr->smb_data.chain_offset;
83 if (skip < 0) {
84 smb2sr_put_error(sr, NT_STATUS_INVALID_PARAMETER);
85 return (SDRC_SUCCESS);
86 }
87 if (skip > 0) {
88 (void) smb_mbc_decodef(&sr->smb_data, "#.", skip);
89 }
90
91 /* This is automatically free'd. */
92 vdb = smb_srm_zalloc(sr, sizeof (*vdb));
93 rc = smb_mbc_decodef(&sr->smb_data, "#B", Length, vdb);
94 if (rc != 0 || vdb->vdb_len != Length) {
95 smb2sr_put_error(sr, NT_STATUS_INVALID_PARAMETER);
96 return (SDRC_SUCCESS);
97 }
98 vdb->vdb_uio.uio_loffset = (offset_t)Offset;
99
100 XferCount = 0;
101 if (Length == 0)
102 goto doreply;
103
104 switch (of->f_tree->t_res_type & STYPE_MASK) {
105 case STYPE_DISKTREE:
106 case STYPE_PRINTQ:
107 if (!smb_node_is_dir(of->f_node)) {
108 /* Check for conflicting locks. */
109 rc = smb_lock_range_access(sr, of->f_node,
110 Offset, Length, B_TRUE);
111 if (rc) {
112 rc = ERANGE;
113 break;
114 }
115 }
116 if ((Flags & SMB2_WRITEFLAG_WRITE_THROUGH) ||
117 (of->f_node->flags & NODE_FLAGS_WRITE_THROUGH)) {
118 stability = FSYNC;
119 }
120 rc = smb_fsop_write(sr, of->f_cr, of->f_node,
121 &vdb->vdb_uio, &XferCount, stability);
122 if (rc)
123 break;
124 of->f_written = B_TRUE;
125 if (!smb_node_is_dir(of->f_node))
126 smb_oplock_break_levelII(of->f_node);
127 break;
128
129 case STYPE_IPC:
130 rc = smb_opipe_write(sr, &vdb->vdb_uio);
131 if (rc == 0)
132 XferCount = Length;
133 break;
134
135 default:
136 rc = EACCES;
137 break;
138 }
139
140 if (rc) {
141 smb2sr_put_errno(sr, rc);
142 return (SDRC_SUCCESS);
143 }
144
145 /*
146 * SMB2 Write reply
147 */
148 doreply:
149 DataOff = SMB2_HDR_SIZE + 16;
150 rc = smb_mbc_encodef(
151 &sr->reply, "wwlll",
152 17, /* StructSize */ /* w */
153 0, /* reserved */ /* w */
154 XferCount, /* l */
155 0, /* DataRemaining */ /* l */
156 0); /* Channel Info */ /* l */
157 if (rc)
158 return (SDRC_ERROR);
159
160 mutex_enter(&of->f_mutex);
161 of->f_seek_pos = Offset + XferCount;
162 mutex_exit(&of->f_mutex);
163
164 return (SDRC_SUCCESS);
165 }