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1 | /* |
2 | * dev_interface.cpp | |
3 | * | |
4 | * Home page of code is: http://smartmontools.sourceforge.net | |
5 | * | |
6 | * Copyright (C) 2008 Christian Franke <smartmontools-support@lists.sourceforge.net> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2, or (at your option) | |
11 | * any later version. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * (for example COPYING); If not, see <http://www.gnu.org/licenses/>. | |
15 | * | |
16 | */ | |
17 | ||
18 | #include "config.h" | |
19 | #include "int64.h" | |
20 | #include "atacmds.h" | |
21 | #include "scsicmds.h" | |
22 | #include "dev_interface.h" | |
23 | #include "dev_tunnelled.h" | |
24 | #include "utility.h" | |
25 | ||
26 | #include <stdexcept> | |
27 | ||
28 | const char * dev_interface_cpp_cvsid = "$Id: dev_interface.cpp,v 1.5 2009/01/30 18:34:55 chrfranke Exp $" | |
29 | DEV_INTERFACE_H_CVSID; | |
30 | ||
31 | ///////////////////////////////////////////////////////////////////////////// | |
32 | // smart_device | |
33 | ||
34 | smart_device::smart_device(smart_interface * intf, const char * dev_name, | |
35 | const char * dev_type, const char * req_type) | |
36 | : m_intf(intf), m_info(dev_name, dev_type, req_type), | |
37 | m_ata_ptr(0), m_scsi_ptr(0) | |
38 | { | |
39 | } | |
40 | ||
41 | smart_device::smart_device(do_not_use_in_implementation_classes) | |
42 | : m_intf(0), m_ata_ptr(0), m_scsi_ptr(0) | |
43 | { | |
44 | throw std::logic_error("smart_device: wrong constructor called in implementation class"); | |
45 | } | |
46 | ||
47 | smart_device::~smart_device() throw() | |
48 | { | |
49 | } | |
50 | ||
51 | bool smart_device::set_err(int no, const char * msg, ...) | |
52 | { | |
53 | if (!msg) | |
54 | return set_err(no); | |
55 | m_err.no = no; | |
56 | va_list ap; va_start(ap, msg); | |
57 | m_err.msg = vstrprintf(msg, ap); | |
58 | va_end(ap); | |
59 | return false; | |
60 | } | |
61 | ||
62 | bool smart_device::set_err(int no) | |
63 | { | |
64 | smi()->set_err_var(&m_err, no); | |
65 | return false; | |
66 | } | |
67 | ||
68 | smart_device * smart_device::autodetect_open() | |
69 | { | |
70 | open(); | |
71 | return this; | |
72 | } | |
73 | ||
74 | bool smart_device::owns(const smart_device * /*dev*/) const | |
75 | { | |
76 | return false; | |
77 | } | |
78 | ||
79 | void smart_device::release(const smart_device * /*dev*/) | |
80 | { | |
81 | } | |
82 | ||
83 | ||
84 | ///////////////////////////////////////////////////////////////////////////// | |
85 | // ata_device | |
86 | ||
87 | ata_in_regs_48bit::ata_in_regs_48bit() | |
88 | : features_16(features, prev.features), | |
89 | sector_count_16(sector_count, prev.sector_count), | |
90 | lba_low_16(lba_low, prev.lba_low), | |
91 | lba_mid_16(lba_mid, prev.lba_mid), | |
92 | lba_high_16(lba_high, prev.lba_high) | |
93 | { | |
94 | } | |
95 | ||
96 | ata_out_regs_48bit::ata_out_regs_48bit() | |
97 | : sector_count_16(sector_count, prev.sector_count), | |
98 | lba_low_16(lba_low, prev.lba_low), | |
99 | lba_mid_16(lba_mid, prev.lba_mid), | |
100 | lba_high_16(lba_high, prev.lba_high) | |
101 | { | |
102 | } | |
103 | ||
104 | ata_cmd_in::ata_cmd_in() | |
105 | : direction(no_data), | |
106 | buffer(0), | |
107 | size(0) | |
108 | { | |
109 | } | |
110 | ||
111 | ata_cmd_out::ata_cmd_out() | |
112 | { | |
113 | } | |
114 | ||
115 | bool ata_device::ata_pass_through(const ata_cmd_in & in) | |
116 | { | |
117 | ata_cmd_out dummy; | |
118 | return ata_pass_through(in, dummy); | |
119 | } | |
120 | ||
121 | bool ata_device::ata_cmd_is_ok(const ata_cmd_in & in, | |
122 | bool data_out_support /*= false*/, | |
123 | bool multi_sector_support /*= false*/, | |
124 | bool ata_48bit_support /*= false*/) | |
125 | { | |
126 | // Check DATA IN/OUT | |
127 | switch (in.direction) { | |
128 | case ata_cmd_in::no_data: break; | |
129 | case ata_cmd_in::data_in: break; | |
130 | case ata_cmd_in::data_out: break; | |
131 | default: | |
132 | return set_err(EINVAL, "Invalid data direction %d", (int)in.direction); | |
133 | } | |
134 | ||
135 | // Check buffer size | |
136 | if (in.direction == ata_cmd_in::no_data) { | |
137 | if (in.size) | |
138 | return set_err(EINVAL, "Buffer size %u > 0 for NO DATA command", in.size); | |
139 | } | |
140 | else { | |
141 | if (!in.buffer) | |
142 | return set_err(EINVAL, "Buffer not set for DATA IN/OUT command"); | |
143 | unsigned count = (in.in_regs.prev.sector_count<<16)|in.in_regs.sector_count; | |
144 | // TODO: Add check for sector count == 0 | |
145 | if (count * 512 != in.size) | |
146 | return set_err(EINVAL, "Sector count %u does not match buffer size %u", count, in.size); | |
147 | } | |
148 | ||
149 | // Check features | |
150 | if (in.direction == ata_cmd_in::data_out && !data_out_support) | |
151 | return set_err(ENOSYS, "DATA OUT ATA commands not supported"); | |
152 | if (!(in.size == 0 || in.size == 512) && !multi_sector_support) | |
153 | return set_err(ENOSYS, "Multi-sector ATA commands not supported"); | |
154 | if (in.in_regs.is_48bit_cmd() && !ata_48bit_support) | |
155 | return set_err(ENOSYS, "48-bit ATA commands not supported"); | |
156 | return true; | |
157 | } | |
158 | ||
159 | bool ata_device::ata_identify_is_cached() const | |
160 | { | |
161 | return false; | |
162 | } | |
163 | ||
164 | ||
165 | ///////////////////////////////////////////////////////////////////////////// | |
166 | // tunnelled_device_base | |
167 | ||
168 | tunnelled_device_base::tunnelled_device_base(smart_device * tunnel_dev) | |
169 | : smart_device(never_called), | |
170 | m_tunnel_base_dev(tunnel_dev) | |
171 | { | |
172 | } | |
173 | ||
174 | tunnelled_device_base::~tunnelled_device_base() throw() | |
175 | { | |
176 | delete m_tunnel_base_dev; | |
177 | } | |
178 | ||
179 | bool tunnelled_device_base::is_open() const | |
180 | { | |
181 | return (m_tunnel_base_dev && m_tunnel_base_dev->is_open()); | |
182 | } | |
183 | ||
184 | bool tunnelled_device_base::open() | |
185 | { | |
186 | if (!m_tunnel_base_dev) | |
187 | return set_err(ENOSYS); | |
188 | if (!m_tunnel_base_dev->open()) | |
189 | return set_err(m_tunnel_base_dev->get_err()); | |
190 | return true; | |
191 | } | |
192 | ||
193 | bool tunnelled_device_base::close() | |
194 | { | |
195 | if (!m_tunnel_base_dev) | |
196 | return true; | |
197 | if (!m_tunnel_base_dev->close()) | |
198 | return set_err(m_tunnel_base_dev->get_err()); | |
199 | return true; | |
200 | } | |
201 | ||
202 | bool tunnelled_device_base::owns(const smart_device * dev) const | |
203 | { | |
204 | return (m_tunnel_base_dev && (m_tunnel_base_dev == dev)); | |
205 | } | |
206 | ||
207 | void tunnelled_device_base::release(const smart_device * dev) | |
208 | { | |
209 | if (m_tunnel_base_dev == dev) | |
210 | m_tunnel_base_dev = 0; | |
211 | } | |
212 | ||
213 | ||
214 | ///////////////////////////////////////////////////////////////////////////// | |
215 | // smart_interface | |
216 | ||
217 | // Pointer to (usually singleton) interface object returned by ::smi() | |
218 | smart_interface * smart_interface::s_instance; | |
219 | ||
220 | const char * smart_interface::get_os_version_str() | |
221 | { | |
222 | return SMARTMONTOOLS_BUILD_HOST; | |
223 | } | |
224 | ||
225 | const char * smart_interface::get_valid_dev_types_str() | |
226 | { | |
227 | static std::string buf; | |
228 | if (!buf.empty()) | |
229 | return buf.c_str(); | |
230 | // default | |
231 | buf = "ata, scsi, sat[,N][+TYPE]"; | |
232 | // append custom | |
233 | const char * add = get_valid_custom_dev_types_str(); | |
234 | if (!add || !*add) | |
235 | return buf.c_str(); | |
236 | buf += ", "; buf += add; | |
237 | return buf.c_str(); | |
238 | } | |
239 | ||
240 | const char * smart_interface::get_app_examples(const char * /*appname*/) | |
241 | { | |
242 | return 0; | |
243 | } | |
244 | ||
245 | void smart_interface::set_err(int no, const char * msg, ...) | |
246 | { | |
247 | if (!msg) { | |
248 | set_err(no); return; | |
249 | } | |
250 | m_err.no = no; | |
251 | va_list ap; va_start(ap, msg); | |
252 | m_err.msg = vstrprintf(msg, ap); | |
253 | va_end(ap); | |
254 | } | |
255 | ||
256 | void smart_interface::set_err(int no) | |
257 | { | |
258 | set_err_var(&m_err, no); | |
259 | } | |
260 | ||
261 | void smart_interface::set_err_var(smart_device::error_info * err, int no) | |
262 | { | |
263 | err->no = no; | |
264 | err->msg = get_msg_for_errno(no); | |
265 | if (err->msg.empty() && no != 0) | |
266 | err->msg = strprintf("Unknown error %d", no); | |
267 | } | |
268 | ||
269 | const char * smart_interface::get_msg_for_errno(int no) | |
270 | { | |
271 | return strerror(no); | |
272 | } | |
273 | ||
274 | ||
275 | ///////////////////////////////////////////////////////////////////////////// | |
276 | // Default device factory | |
277 | ||
278 | smart_device * smart_interface::get_smart_device(const char * name, const char * type) | |
279 | { | |
280 | clear_err(); | |
281 | if (!type || !*type) { | |
282 | smart_device * dev = autodetect_smart_device(name); | |
283 | if (!dev && !get_errno()) | |
284 | set_err(EINVAL, "Unable to detect device type"); | |
285 | return dev; | |
286 | } | |
287 | ||
288 | smart_device * dev = get_custom_smart_device(name, type); | |
289 | if (dev || get_errno()) | |
290 | return dev; | |
291 | ||
292 | if (!strcmp(type, "ata")) | |
293 | dev = get_ata_device(name, type); | |
294 | else if (!strcmp(type, "scsi")) | |
295 | dev = get_scsi_device(name, type); | |
296 | ||
297 | else if ( ((!strncmp(type, "sat", 3) && (!type[3] || strchr(",+", type[3]))) | |
298 | || (!strncmp(type, "usb", 3)))) { | |
299 | // Split "sat...+base..." -> ("sat...", "base...") | |
300 | unsigned satlen = strcspn(type, "+"); | |
301 | std::string sattype(type, satlen); | |
302 | const char * basetype = (type[satlen] ? type+satlen+1 : ""); | |
303 | // Recurse to allocate base device, default is standard SCSI | |
304 | if (!*basetype) | |
305 | basetype = "scsi"; | |
306 | dev = get_smart_device(name, basetype); | |
307 | if (!dev) { | |
308 | set_err(EINVAL, "Type '%s+...': %s", sattype.c_str(), get_errmsg()); | |
309 | return 0; | |
310 | } | |
311 | // Result must be SCSI | |
312 | if (!dev->is_scsi()) { | |
313 | delete dev; | |
314 | set_err(EINVAL, "Type '%s+...': Device type '%s' is not SCSI", sattype.c_str(), basetype); | |
315 | return 0; | |
316 | } | |
317 | // Attach SAT tunnel | |
318 | try { | |
319 | ata_device * satdev = get_sat_device(sattype.c_str(), dev->to_scsi()); | |
320 | if (!satdev) { | |
321 | delete dev; | |
322 | return 0; | |
323 | } | |
324 | return satdev; | |
325 | } | |
326 | catch (...) { | |
327 | delete dev; throw; | |
328 | } | |
329 | } | |
330 | ||
331 | else { | |
332 | set_err(EINVAL, "Unknown device type '%s'", type); | |
333 | return 0; | |
334 | } | |
335 | if (!dev && !get_errno()) | |
336 | set_err(EINVAL, "Not a device of type '%s'", type); | |
337 | return dev; | |
338 | } | |
339 | ||
340 | smart_device * smart_interface::get_custom_smart_device(const char * /*name*/, const char * /*type*/) | |
341 | { | |
342 | return 0; | |
343 | } | |
344 | ||
345 | const char * smart_interface::get_valid_custom_dev_types_str() | |
346 | { | |
347 | return 0; | |
348 | } |