Commit | Line | Data |
---|---|---|
245ba56a KS |
1 | /* |
2 | * An implementation of key value pair (KVP) functionality for Linux. | |
3 | * | |
4 | * | |
5 | * Copyright (C) 2010, Novell, Inc. | |
6 | * Author : K. Y. Srinivasan <ksrinivasan@novell.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify it | |
9 | * under the terms of the GNU General Public License version 2 as published | |
10 | * by the Free Software Foundation. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or | |
15 | * NON INFRINGEMENT. See the GNU General Public License for more | |
16 | * details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
21 | * | |
22 | */ | |
af7a5b6e | 23 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
245ba56a KS |
24 | |
25 | #include <linux/net.h> | |
26 | #include <linux/nls.h> | |
27 | #include <linux/connector.h> | |
28 | #include <linux/workqueue.h> | |
46a97191 | 29 | #include <linux/hyperv.h> |
245ba56a | 30 | |
3647a83d | 31 | #include "hyperv_vmbus.h" |
245ba56a | 32 | |
6741335b S |
33 | /* |
34 | * Pre win8 version numbers used in ws2008 and ws 2008 r2 (win7) | |
35 | */ | |
3a491605 S |
36 | #define WS2008_SRV_MAJOR 1 |
37 | #define WS2008_SRV_MINOR 0 | |
38 | #define WS2008_SRV_VERSION (WS2008_SRV_MAJOR << 16 | WS2008_SRV_MINOR) | |
39 | ||
6741335b S |
40 | #define WIN7_SRV_MAJOR 3 |
41 | #define WIN7_SRV_MINOR 0 | |
3a491605 | 42 | #define WIN7_SRV_VERSION (WIN7_SRV_MAJOR << 16 | WIN7_SRV_MINOR) |
6741335b S |
43 | |
44 | #define WIN8_SRV_MAJOR 4 | |
45 | #define WIN8_SRV_MINOR 0 | |
3a491605 | 46 | #define WIN8_SRV_VERSION (WIN8_SRV_MAJOR << 16 | WIN8_SRV_MINOR) |
245ba56a KS |
47 | |
48 | /* | |
97bf16cd VK |
49 | * Global state maintained for transaction that is being processed. For a class |
50 | * of integration services, including the "KVP service", the specified protocol | |
51 | * is a "request/response" protocol which means that there can only be single | |
52 | * outstanding transaction from the host at any given point in time. We use | |
53 | * this to simplify memory management in this driver - we cache and process | |
54 | * only one message at a time. | |
245ba56a | 55 | * |
97bf16cd VK |
56 | * While the request/response protocol is guaranteed by the host, we further |
57 | * ensure this by serializing packet processing in this driver - we do not | |
58 | * read additional packets from the VMBUs until the current packet is fully | |
59 | * handled. | |
245ba56a KS |
60 | */ |
61 | ||
62 | static struct { | |
97bf16cd | 63 | int state; /* hvutil_device_state */ |
245ba56a | 64 | int recv_len; /* number of bytes received. */ |
fa3d5b85 | 65 | struct hv_kvp_msg *kvp_msg; /* current message */ |
245ba56a KS |
66 | struct vmbus_channel *recv_channel; /* chn we got the request */ |
67 | u64 recv_req_id; /* request ID. */ | |
fa3d5b85 | 68 | void *kvp_context; /* for the channel callback */ |
245ba56a KS |
69 | } kvp_transaction; |
70 | ||
b47a81dc S |
71 | /* |
72 | * This state maintains the version number registered by the daemon. | |
73 | */ | |
74 | static int dm_reg_value; | |
75 | ||
e2bb6537 | 76 | static void kvp_send_key(struct work_struct *dummy); |
245ba56a | 77 | |
76e5f813 | 78 | |
03db7724 | 79 | static void kvp_respond_to_host(struct hv_kvp_msg *msg, int error); |
68c8b39a | 80 | static void kvp_timeout_func(struct work_struct *dummy); |
b47a81dc | 81 | static void kvp_register(int); |
245ba56a | 82 | |
68c8b39a | 83 | static DECLARE_DELAYED_WORK(kvp_timeout_work, kvp_timeout_func); |
e2bb6537 | 84 | static DECLARE_WORK(kvp_sendkey_work, kvp_send_key); |
245ba56a KS |
85 | |
86 | static struct cb_id kvp_id = { CN_KVP_IDX, CN_KVP_VAL }; | |
87 | static const char kvp_name[] = "kvp_kernel_module"; | |
245ba56a KS |
88 | static u8 *recv_buffer; |
89 | /* | |
90 | * Register the kernel component with the user-level daemon. | |
91 | * As part of this registration, pass the LIC version number. | |
cfc25993 | 92 | * This number has no meaning, it satisfies the registration protocol. |
245ba56a | 93 | */ |
cfc25993 | 94 | #define HV_DRV_VERSION "3.1" |
245ba56a KS |
95 | |
96 | static void | |
b47a81dc | 97 | kvp_register(int reg_value) |
245ba56a KS |
98 | { |
99 | ||
100 | struct cn_msg *msg; | |
26403354 S |
101 | struct hv_kvp_msg *kvp_msg; |
102 | char *version; | |
245ba56a | 103 | |
26403354 | 104 | msg = kzalloc(sizeof(*msg) + sizeof(struct hv_kvp_msg), GFP_ATOMIC); |
245ba56a KS |
105 | |
106 | if (msg) { | |
26403354 | 107 | kvp_msg = (struct hv_kvp_msg *)msg->data; |
e485ceac | 108 | version = kvp_msg->body.kvp_register.version; |
245ba56a KS |
109 | msg->id.idx = CN_KVP_IDX; |
110 | msg->id.val = CN_KVP_VAL; | |
26403354 | 111 | |
b47a81dc | 112 | kvp_msg->kvp_hdr.operation = reg_value; |
26403354 S |
113 | strcpy(version, HV_DRV_VERSION); |
114 | msg->len = sizeof(struct hv_kvp_msg); | |
ac8f7330 | 115 | cn_netlink_send(msg, 0, 0, GFP_ATOMIC); |
245ba56a KS |
116 | kfree(msg); |
117 | } | |
118 | } | |
68c8b39a VK |
119 | |
120 | static void kvp_timeout_func(struct work_struct *dummy) | |
245ba56a KS |
121 | { |
122 | /* | |
123 | * If the timer fires, the user-mode component has not responded; | |
124 | * process the pending transaction. | |
125 | */ | |
03db7724 | 126 | kvp_respond_to_host(NULL, HV_E_FAIL); |
97bf16cd VK |
127 | |
128 | /* Transaction is finished, reset the state. */ | |
129 | if (kvp_transaction.state > HVUTIL_READY) | |
130 | kvp_transaction.state = HVUTIL_READY; | |
131 | ||
132 | hv_poll_channel(kvp_transaction.kvp_context, | |
133 | hv_kvp_onchannelcallback); | |
b47a81dc S |
134 | } |
135 | ||
136 | static int kvp_handle_handshake(struct hv_kvp_msg *msg) | |
137 | { | |
138 | int ret = 1; | |
139 | ||
140 | switch (msg->kvp_hdr.operation) { | |
141 | case KVP_OP_REGISTER: | |
142 | dm_reg_value = KVP_OP_REGISTER; | |
143 | pr_info("KVP: IP injection functionality not available\n"); | |
144 | pr_info("KVP: Upgrade the KVP daemon\n"); | |
145 | break; | |
146 | case KVP_OP_REGISTER1: | |
147 | dm_reg_value = KVP_OP_REGISTER1; | |
148 | break; | |
149 | default: | |
150 | pr_info("KVP: incompatible daemon\n"); | |
151 | pr_info("KVP: KVP version: %d, Daemon version: %d\n", | |
152 | KVP_OP_REGISTER1, msg->kvp_hdr.operation); | |
153 | ret = 0; | |
154 | } | |
155 | ||
156 | if (ret) { | |
157 | /* | |
158 | * We have a compatible daemon; complete the handshake. | |
159 | */ | |
160 | pr_info("KVP: user-mode registering done.\n"); | |
161 | kvp_register(dm_reg_value); | |
97bf16cd | 162 | kvp_transaction.state = HVUTIL_READY; |
b47a81dc S |
163 | } |
164 | return ret; | |
245ba56a KS |
165 | } |
166 | ||
b47a81dc | 167 | |
245ba56a KS |
168 | /* |
169 | * Callback when data is received from user mode. | |
170 | */ | |
171 | ||
172 | static void | |
173 | kvp_cn_callback(struct cn_msg *msg, struct netlink_skb_parms *nsp) | |
174 | { | |
26403354 S |
175 | struct hv_kvp_msg *message; |
176 | struct hv_kvp_msg_enumerate *data; | |
b47a81dc | 177 | int error = 0; |
245ba56a | 178 | |
26403354 | 179 | message = (struct hv_kvp_msg *)msg->data; |
b47a81dc S |
180 | |
181 | /* | |
182 | * If we are negotiating the version information | |
183 | * with the daemon; handle that first. | |
184 | */ | |
185 | ||
97bf16cd VK |
186 | if (kvp_transaction.state < HVUTIL_READY) { |
187 | kvp_handle_handshake(message); | |
b47a81dc S |
188 | return; |
189 | } | |
190 | ||
97bf16cd VK |
191 | /* We didn't send anything to userspace so the reply is spurious */ |
192 | if (kvp_transaction.state < HVUTIL_USERSPACE_REQ) | |
193 | return; | |
194 | kvp_transaction.state = HVUTIL_USERSPACE_RECV; | |
195 | ||
b47a81dc S |
196 | /* |
197 | * Based on the version of the daemon, we propagate errors from the | |
198 | * daemon differently. | |
199 | */ | |
200 | ||
201 | data = &message->body.kvp_enum_data; | |
202 | ||
203 | switch (dm_reg_value) { | |
fa3d5b85 | 204 | case KVP_OP_REGISTER: |
b47a81dc S |
205 | /* |
206 | * Null string is used to pass back error condition. | |
207 | */ | |
208 | if (data->data.key[0] == 0) | |
209 | error = HV_S_CONT; | |
fa3d5b85 | 210 | break; |
245ba56a | 211 | |
b47a81dc | 212 | case KVP_OP_REGISTER1: |
245ba56a | 213 | /* |
b47a81dc S |
214 | * We use the message header information from |
215 | * the user level daemon to transmit errors. | |
245ba56a | 216 | */ |
b47a81dc S |
217 | error = message->error; |
218 | break; | |
245ba56a | 219 | } |
b47a81dc S |
220 | |
221 | /* | |
222 | * Complete the transaction by forwarding the key value | |
223 | * to the host. But first, cancel the timeout. | |
224 | */ | |
97bf16cd | 225 | if (cancel_delayed_work_sync(&kvp_timeout_work)) { |
03db7724 | 226 | kvp_respond_to_host(message, error); |
97bf16cd VK |
227 | kvp_transaction.state = HVUTIL_READY; |
228 | hv_poll_channel(kvp_transaction.kvp_context, | |
229 | hv_kvp_onchannelcallback); | |
230 | } | |
245ba56a KS |
231 | } |
232 | ||
03db7724 S |
233 | |
234 | static int process_ob_ipinfo(void *in_msg, void *out_msg, int op) | |
235 | { | |
236 | struct hv_kvp_msg *in = in_msg; | |
237 | struct hv_kvp_ip_msg *out = out_msg; | |
238 | int len; | |
239 | ||
240 | switch (op) { | |
241 | case KVP_OP_GET_IP_INFO: | |
242 | /* | |
243 | * Transform all parameters into utf16 encoding. | |
244 | */ | |
245 | len = utf8s_to_utf16s((char *)in->body.kvp_ip_val.ip_addr, | |
246 | strlen((char *)in->body.kvp_ip_val.ip_addr), | |
247 | UTF16_HOST_ENDIAN, | |
248 | (wchar_t *)out->kvp_ip_val.ip_addr, | |
249 | MAX_IP_ADDR_SIZE); | |
250 | if (len < 0) | |
251 | return len; | |
252 | ||
253 | len = utf8s_to_utf16s((char *)in->body.kvp_ip_val.sub_net, | |
254 | strlen((char *)in->body.kvp_ip_val.sub_net), | |
255 | UTF16_HOST_ENDIAN, | |
256 | (wchar_t *)out->kvp_ip_val.sub_net, | |
257 | MAX_IP_ADDR_SIZE); | |
258 | if (len < 0) | |
259 | return len; | |
260 | ||
261 | len = utf8s_to_utf16s((char *)in->body.kvp_ip_val.gate_way, | |
262 | strlen((char *)in->body.kvp_ip_val.gate_way), | |
263 | UTF16_HOST_ENDIAN, | |
264 | (wchar_t *)out->kvp_ip_val.gate_way, | |
265 | MAX_GATEWAY_SIZE); | |
266 | if (len < 0) | |
267 | return len; | |
268 | ||
269 | len = utf8s_to_utf16s((char *)in->body.kvp_ip_val.dns_addr, | |
270 | strlen((char *)in->body.kvp_ip_val.dns_addr), | |
271 | UTF16_HOST_ENDIAN, | |
272 | (wchar_t *)out->kvp_ip_val.dns_addr, | |
273 | MAX_IP_ADDR_SIZE); | |
274 | if (len < 0) | |
275 | return len; | |
276 | ||
277 | len = utf8s_to_utf16s((char *)in->body.kvp_ip_val.adapter_id, | |
278 | strlen((char *)in->body.kvp_ip_val.adapter_id), | |
279 | UTF16_HOST_ENDIAN, | |
280 | (wchar_t *)out->kvp_ip_val.adapter_id, | |
281 | MAX_IP_ADDR_SIZE); | |
282 | if (len < 0) | |
283 | return len; | |
284 | ||
285 | out->kvp_ip_val.dhcp_enabled = | |
286 | in->body.kvp_ip_val.dhcp_enabled; | |
a500e0e7 S |
287 | out->kvp_ip_val.addr_family = |
288 | in->body.kvp_ip_val.addr_family; | |
03db7724 S |
289 | } |
290 | ||
291 | return 0; | |
292 | } | |
293 | ||
294 | static void process_ib_ipinfo(void *in_msg, void *out_msg, int op) | |
295 | { | |
296 | struct hv_kvp_ip_msg *in = in_msg; | |
297 | struct hv_kvp_msg *out = out_msg; | |
298 | ||
299 | switch (op) { | |
300 | case KVP_OP_SET_IP_INFO: | |
301 | /* | |
302 | * Transform all parameters into utf8 encoding. | |
303 | */ | |
304 | utf16s_to_utf8s((wchar_t *)in->kvp_ip_val.ip_addr, | |
305 | MAX_IP_ADDR_SIZE, | |
306 | UTF16_LITTLE_ENDIAN, | |
307 | (__u8 *)out->body.kvp_ip_val.ip_addr, | |
308 | MAX_IP_ADDR_SIZE); | |
309 | ||
310 | utf16s_to_utf8s((wchar_t *)in->kvp_ip_val.sub_net, | |
311 | MAX_IP_ADDR_SIZE, | |
312 | UTF16_LITTLE_ENDIAN, | |
313 | (__u8 *)out->body.kvp_ip_val.sub_net, | |
314 | MAX_IP_ADDR_SIZE); | |
315 | ||
316 | utf16s_to_utf8s((wchar_t *)in->kvp_ip_val.gate_way, | |
317 | MAX_GATEWAY_SIZE, | |
318 | UTF16_LITTLE_ENDIAN, | |
319 | (__u8 *)out->body.kvp_ip_val.gate_way, | |
320 | MAX_GATEWAY_SIZE); | |
321 | ||
322 | utf16s_to_utf8s((wchar_t *)in->kvp_ip_val.dns_addr, | |
323 | MAX_IP_ADDR_SIZE, | |
324 | UTF16_LITTLE_ENDIAN, | |
325 | (__u8 *)out->body.kvp_ip_val.dns_addr, | |
326 | MAX_IP_ADDR_SIZE); | |
327 | ||
328 | out->body.kvp_ip_val.dhcp_enabled = in->kvp_ip_val.dhcp_enabled; | |
329 | ||
330 | default: | |
331 | utf16s_to_utf8s((wchar_t *)in->kvp_ip_val.adapter_id, | |
332 | MAX_ADAPTER_ID_SIZE, | |
333 | UTF16_LITTLE_ENDIAN, | |
334 | (__u8 *)out->body.kvp_ip_val.adapter_id, | |
335 | MAX_ADAPTER_ID_SIZE); | |
336 | ||
337 | out->body.kvp_ip_val.addr_family = in->kvp_ip_val.addr_family; | |
338 | } | |
339 | } | |
340 | ||
341 | ||
342 | ||
343 | ||
e2bb6537 S |
344 | static void |
345 | kvp_send_key(struct work_struct *dummy) | |
245ba56a KS |
346 | { |
347 | struct cn_msg *msg; | |
26403354 | 348 | struct hv_kvp_msg *message; |
fa3d5b85 S |
349 | struct hv_kvp_msg *in_msg; |
350 | __u8 operation = kvp_transaction.kvp_msg->kvp_hdr.operation; | |
351 | __u8 pool = kvp_transaction.kvp_msg->kvp_hdr.pool; | |
352 | __u32 val32; | |
353 | __u64 val64; | |
8d9560eb | 354 | int rc; |
245ba56a | 355 | |
97bf16cd VK |
356 | /* The transaction state is wrong. */ |
357 | if (kvp_transaction.state != HVUTIL_HOSTMSG_RECEIVED) | |
358 | return; | |
359 | ||
245ba56a | 360 | msg = kzalloc(sizeof(*msg) + sizeof(struct hv_kvp_msg) , GFP_ATOMIC); |
fa3d5b85 S |
361 | if (!msg) |
362 | return; | |
245ba56a | 363 | |
fa3d5b85 S |
364 | msg->id.idx = CN_KVP_IDX; |
365 | msg->id.val = CN_KVP_VAL; | |
26403354 | 366 | |
fa3d5b85 S |
367 | message = (struct hv_kvp_msg *)msg->data; |
368 | message->kvp_hdr.operation = operation; | |
369 | message->kvp_hdr.pool = pool; | |
370 | in_msg = kvp_transaction.kvp_msg; | |
371 | ||
372 | /* | |
373 | * The key/value strings sent from the host are encoded in | |
374 | * in utf16; convert it to utf8 strings. | |
375 | * The host assures us that the utf16 strings will not exceed | |
376 | * the max lengths specified. We will however, reserve room | |
377 | * for the string terminating character - in the utf16s_utf8s() | |
378 | * function we limit the size of the buffer where the converted | |
379 | * string is placed to HV_KVP_EXCHANGE_MAX_*_SIZE -1 to gaurantee | |
380 | * that the strings can be properly terminated! | |
381 | */ | |
382 | ||
383 | switch (message->kvp_hdr.operation) { | |
03db7724 S |
384 | case KVP_OP_SET_IP_INFO: |
385 | process_ib_ipinfo(in_msg, message, KVP_OP_SET_IP_INFO); | |
386 | break; | |
387 | case KVP_OP_GET_IP_INFO: | |
388 | process_ib_ipinfo(in_msg, message, KVP_OP_GET_IP_INFO); | |
389 | break; | |
fa3d5b85 S |
390 | case KVP_OP_SET: |
391 | switch (in_msg->body.kvp_set.data.value_type) { | |
392 | case REG_SZ: | |
393 | /* | |
394 | * The value is a string - utf16 encoding. | |
395 | */ | |
396 | message->body.kvp_set.data.value_size = | |
397 | utf16s_to_utf8s( | |
398 | (wchar_t *)in_msg->body.kvp_set.data.value, | |
399 | in_msg->body.kvp_set.data.value_size, | |
400 | UTF16_LITTLE_ENDIAN, | |
401 | message->body.kvp_set.data.value, | |
402 | HV_KVP_EXCHANGE_MAX_VALUE_SIZE - 1) + 1; | |
403 | break; | |
404 | ||
405 | case REG_U32: | |
406 | /* | |
407 | * The value is a 32 bit scalar. | |
408 | * We save this as a utf8 string. | |
409 | */ | |
410 | val32 = in_msg->body.kvp_set.data.value_u32; | |
411 | message->body.kvp_set.data.value_size = | |
412 | sprintf(message->body.kvp_set.data.value, | |
413 | "%d", val32) + 1; | |
414 | break; | |
415 | ||
416 | case REG_U64: | |
417 | /* | |
418 | * The value is a 64 bit scalar. | |
419 | * We save this as a utf8 string. | |
420 | */ | |
421 | val64 = in_msg->body.kvp_set.data.value_u64; | |
422 | message->body.kvp_set.data.value_size = | |
423 | sprintf(message->body.kvp_set.data.value, | |
424 | "%llu", val64) + 1; | |
425 | break; | |
426 | ||
427 | } | |
428 | case KVP_OP_GET: | |
429 | message->body.kvp_set.data.key_size = | |
430 | utf16s_to_utf8s( | |
431 | (wchar_t *)in_msg->body.kvp_set.data.key, | |
432 | in_msg->body.kvp_set.data.key_size, | |
433 | UTF16_LITTLE_ENDIAN, | |
434 | message->body.kvp_set.data.key, | |
435 | HV_KVP_EXCHANGE_MAX_KEY_SIZE - 1) + 1; | |
436 | break; | |
437 | ||
438 | case KVP_OP_DELETE: | |
439 | message->body.kvp_delete.key_size = | |
440 | utf16s_to_utf8s( | |
441 | (wchar_t *)in_msg->body.kvp_delete.key, | |
442 | in_msg->body.kvp_delete.key_size, | |
443 | UTF16_LITTLE_ENDIAN, | |
444 | message->body.kvp_delete.key, | |
445 | HV_KVP_EXCHANGE_MAX_KEY_SIZE - 1) + 1; | |
446 | break; | |
447 | ||
448 | case KVP_OP_ENUMERATE: | |
449 | message->body.kvp_enum_data.index = | |
450 | in_msg->body.kvp_enum_data.index; | |
451 | break; | |
245ba56a | 452 | } |
fa3d5b85 S |
453 | |
454 | msg->len = sizeof(struct hv_kvp_msg); | |
97bf16cd | 455 | kvp_transaction.state = HVUTIL_USERSPACE_REQ; |
8d9560eb VK |
456 | rc = cn_netlink_send(msg, 0, 0, GFP_ATOMIC); |
457 | if (rc) { | |
458 | pr_debug("KVP: failed to communicate to the daemon: %d\n", rc); | |
97bf16cd | 459 | if (cancel_delayed_work_sync(&kvp_timeout_work)) { |
8d9560eb | 460 | kvp_respond_to_host(message, HV_E_FAIL); |
97bf16cd VK |
461 | kvp_transaction.state = HVUTIL_READY; |
462 | } | |
8d9560eb VK |
463 | } |
464 | ||
fa3d5b85 S |
465 | kfree(msg); |
466 | ||
e2bb6537 | 467 | return; |
245ba56a KS |
468 | } |
469 | ||
470 | /* | |
471 | * Send a response back to the host. | |
472 | */ | |
473 | ||
474 | static void | |
03db7724 | 475 | kvp_respond_to_host(struct hv_kvp_msg *msg_to_host, int error) |
245ba56a KS |
476 | { |
477 | struct hv_kvp_msg *kvp_msg; | |
fa3d5b85 | 478 | struct hv_kvp_exchg_msg_value *kvp_data; |
245ba56a | 479 | char *key_name; |
03db7724 | 480 | char *value; |
245ba56a | 481 | struct icmsg_hdr *icmsghdrp; |
fa3d5b85 S |
482 | int keylen = 0; |
483 | int valuelen = 0; | |
245ba56a KS |
484 | u32 buf_len; |
485 | struct vmbus_channel *channel; | |
486 | u64 req_id; | |
03db7724 | 487 | int ret; |
245ba56a | 488 | |
245ba56a KS |
489 | /* |
490 | * Copy the global state for completing the transaction. Note that | |
491 | * only one transaction can be active at a time. | |
492 | */ | |
493 | ||
494 | buf_len = kvp_transaction.recv_len; | |
495 | channel = kvp_transaction.recv_channel; | |
496 | req_id = kvp_transaction.recv_req_id; | |
497 | ||
fa3d5b85 S |
498 | icmsghdrp = (struct icmsg_hdr *) |
499 | &recv_buffer[sizeof(struct vmbuspipe_hdr)]; | |
500 | ||
4e65f6e8 S |
501 | if (channel->onchannel_callback == NULL) |
502 | /* | |
503 | * We have raced with util driver being unloaded; | |
504 | * silently return. | |
505 | */ | |
506 | return; | |
507 | ||
b47a81dc | 508 | icmsghdrp->status = error; |
245ba56a KS |
509 | |
510 | /* | |
adc80ae6 S |
511 | * If the error parameter is set, terminate the host's enumeration |
512 | * on this pool. | |
245ba56a KS |
513 | */ |
514 | if (error) { | |
515 | /* | |
b47a81dc S |
516 | * Something failed or we have timedout; |
517 | * terminate the current host-side iteration. | |
245ba56a | 518 | */ |
245ba56a KS |
519 | goto response_done; |
520 | } | |
521 | ||
fa3d5b85 S |
522 | kvp_msg = (struct hv_kvp_msg *) |
523 | &recv_buffer[sizeof(struct vmbuspipe_hdr) + | |
524 | sizeof(struct icmsg_hdr)]; | |
525 | ||
526 | switch (kvp_transaction.kvp_msg->kvp_hdr.operation) { | |
03db7724 S |
527 | case KVP_OP_GET_IP_INFO: |
528 | ret = process_ob_ipinfo(msg_to_host, | |
529 | (struct hv_kvp_ip_msg *)kvp_msg, | |
530 | KVP_OP_GET_IP_INFO); | |
531 | if (ret < 0) | |
532 | icmsghdrp->status = HV_E_FAIL; | |
533 | ||
534 | goto response_done; | |
535 | case KVP_OP_SET_IP_INFO: | |
536 | goto response_done; | |
fa3d5b85 S |
537 | case KVP_OP_GET: |
538 | kvp_data = &kvp_msg->body.kvp_get.data; | |
539 | goto copy_value; | |
540 | ||
541 | case KVP_OP_SET: | |
542 | case KVP_OP_DELETE: | |
543 | goto response_done; | |
544 | ||
545 | default: | |
546 | break; | |
547 | } | |
548 | ||
549 | kvp_data = &kvp_msg->body.kvp_enum_data.data; | |
03db7724 | 550 | key_name = msg_to_host->body.kvp_enum_data.data.key; |
fa3d5b85 | 551 | |
245ba56a KS |
552 | /* |
553 | * The windows host expects the key/value pair to be encoded | |
fa3d5b85 S |
554 | * in utf16. Ensure that the key/value size reported to the host |
555 | * will be less than or equal to the MAX size (including the | |
556 | * terminating character). | |
245ba56a | 557 | */ |
0720a06a | 558 | keylen = utf8s_to_utf16s(key_name, strlen(key_name), UTF16_HOST_ENDIAN, |
fa3d5b85 S |
559 | (wchar_t *) kvp_data->key, |
560 | (HV_KVP_EXCHANGE_MAX_KEY_SIZE / 2) - 2); | |
561 | kvp_data->key_size = 2*(keylen + 1); /* utf16 encoding */ | |
562 | ||
563 | copy_value: | |
03db7724 | 564 | value = msg_to_host->body.kvp_enum_data.data.value; |
0720a06a | 565 | valuelen = utf8s_to_utf16s(value, strlen(value), UTF16_HOST_ENDIAN, |
fa3d5b85 S |
566 | (wchar_t *) kvp_data->value, |
567 | (HV_KVP_EXCHANGE_MAX_VALUE_SIZE / 2) - 2); | |
568 | kvp_data->value_size = 2*(valuelen + 1); /* utf16 encoding */ | |
245ba56a | 569 | |
fa3d5b85 S |
570 | /* |
571 | * If the utf8s to utf16s conversion failed; notify host | |
572 | * of the error. | |
573 | */ | |
574 | if ((keylen < 0) || (valuelen < 0)) | |
575 | icmsghdrp->status = HV_E_FAIL; | |
576 | ||
577 | kvp_data->value_type = REG_SZ; /* all our values are strings */ | |
245ba56a KS |
578 | |
579 | response_done: | |
580 | icmsghdrp->icflags = ICMSGHDRFLAG_TRANSACTION | ICMSGHDRFLAG_RESPONSE; | |
581 | ||
582 | vmbus_sendpacket(channel, recv_buffer, buf_len, req_id, | |
415f2287 | 583 | VM_PKT_DATA_INBAND, 0); |
245ba56a KS |
584 | } |
585 | ||
586 | /* | |
587 | * This callback is invoked when we get a KVP message from the host. | |
588 | * The host ensures that only one KVP transaction can be active at a time. | |
589 | * KVP implementation in Linux needs to forward the key to a user-mde | |
590 | * component to retrive the corresponding value. Consequently, we cannot | |
591 | * respond to the host in the conext of this callback. Since the host | |
592 | * guarantees that at most only one transaction can be active at a time, | |
593 | * we stash away the transaction state in a set of global variables. | |
594 | */ | |
595 | ||
596 | void hv_kvp_onchannelcallback(void *context) | |
597 | { | |
598 | struct vmbus_channel *channel = context; | |
599 | u32 recvlen; | |
600 | u64 requestid; | |
601 | ||
602 | struct hv_kvp_msg *kvp_msg; | |
245ba56a KS |
603 | |
604 | struct icmsg_hdr *icmsghdrp; | |
605 | struct icmsg_negotiate *negop = NULL; | |
3a491605 S |
606 | int util_fw_version; |
607 | int kvp_srv_version; | |
245ba56a | 608 | |
97bf16cd | 609 | if (kvp_transaction.state > HVUTIL_READY) { |
fa3d5b85 S |
610 | /* |
611 | * We will defer processing this callback once | |
612 | * the current transaction is complete. | |
613 | */ | |
614 | kvp_transaction.kvp_context = context; | |
615 | return; | |
616 | } | |
5fa97480 | 617 | kvp_transaction.kvp_context = NULL; |
245ba56a | 618 | |
9bd2d0df | 619 | vmbus_recvpacket(channel, recv_buffer, PAGE_SIZE * 4, &recvlen, |
03db7724 | 620 | &requestid); |
245ba56a KS |
621 | |
622 | if (recvlen > 0) { | |
245ba56a KS |
623 | icmsghdrp = (struct icmsg_hdr *)&recv_buffer[ |
624 | sizeof(struct vmbuspipe_hdr)]; | |
625 | ||
626 | if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) { | |
6741335b | 627 | /* |
3a491605 S |
628 | * Based on the host, select appropriate |
629 | * framework and service versions we will | |
630 | * negotiate. | |
6741335b | 631 | */ |
3a491605 S |
632 | switch (vmbus_proto_version) { |
633 | case (VERSION_WS2008): | |
634 | util_fw_version = UTIL_WS2K8_FW_VERSION; | |
635 | kvp_srv_version = WS2008_SRV_VERSION; | |
636 | break; | |
637 | case (VERSION_WIN7): | |
638 | util_fw_version = UTIL_FW_VERSION; | |
639 | kvp_srv_version = WIN7_SRV_VERSION; | |
640 | break; | |
641 | default: | |
642 | util_fw_version = UTIL_FW_VERSION; | |
643 | kvp_srv_version = WIN8_SRV_VERSION; | |
644 | } | |
c836d0ab | 645 | vmbus_prep_negotiate_resp(icmsghdrp, negop, |
3a491605 S |
646 | recv_buffer, util_fw_version, |
647 | kvp_srv_version); | |
6741335b | 648 | |
245ba56a KS |
649 | } else { |
650 | kvp_msg = (struct hv_kvp_msg *)&recv_buffer[ | |
651 | sizeof(struct vmbuspipe_hdr) + | |
652 | sizeof(struct icmsg_hdr)]; | |
653 | ||
245ba56a KS |
654 | /* |
655 | * Stash away this global state for completing the | |
656 | * transaction; note transactions are serialized. | |
657 | */ | |
fa3d5b85 | 658 | |
245ba56a KS |
659 | kvp_transaction.recv_len = recvlen; |
660 | kvp_transaction.recv_channel = channel; | |
661 | kvp_transaction.recv_req_id = requestid; | |
fa3d5b85 | 662 | kvp_transaction.kvp_msg = kvp_msg; |
245ba56a | 663 | |
97bf16cd VK |
664 | if (kvp_transaction.state < HVUTIL_READY) { |
665 | /* Userspace is not registered yet */ | |
666 | kvp_respond_to_host(NULL, HV_E_FAIL); | |
667 | return; | |
668 | } | |
669 | kvp_transaction.state = HVUTIL_HOSTMSG_RECEIVED; | |
670 | ||
245ba56a KS |
671 | /* |
672 | * Get the information from the | |
673 | * user-mode component. | |
674 | * component. This transaction will be | |
675 | * completed when we get the value from | |
676 | * the user-mode component. | |
677 | * Set a timeout to deal with | |
678 | * user-mode not responding. | |
679 | */ | |
e2bb6537 | 680 | schedule_work(&kvp_sendkey_work); |
68c8b39a | 681 | schedule_delayed_work(&kvp_timeout_work, 5*HZ); |
245ba56a KS |
682 | |
683 | return; | |
684 | ||
685 | } | |
686 | ||
245ba56a KS |
687 | icmsghdrp->icflags = ICMSGHDRFLAG_TRANSACTION |
688 | | ICMSGHDRFLAG_RESPONSE; | |
689 | ||
690 | vmbus_sendpacket(channel, recv_buffer, | |
691 | recvlen, requestid, | |
415f2287 | 692 | VM_PKT_DATA_INBAND, 0); |
245ba56a KS |
693 | } |
694 | ||
695 | } | |
696 | ||
697 | int | |
a29b643c | 698 | hv_kvp_init(struct hv_util_service *srv) |
245ba56a KS |
699 | { |
700 | int err; | |
701 | ||
702 | err = cn_add_callback(&kvp_id, kvp_name, kvp_cn_callback); | |
703 | if (err) | |
704 | return err; | |
a29b643c | 705 | recv_buffer = srv->recv_buffer; |
245ba56a | 706 | |
fa3d5b85 S |
707 | /* |
708 | * When this driver loads, the user level daemon that | |
709 | * processes the host requests may not yet be running. | |
710 | * Defer processing channel callbacks until the daemon | |
711 | * has registered. | |
712 | */ | |
97bf16cd | 713 | kvp_transaction.state = HVUTIL_DEVICE_INIT; |
fa3d5b85 | 714 | |
245ba56a KS |
715 | return 0; |
716 | } | |
717 | ||
718 | void hv_kvp_deinit(void) | |
719 | { | |
97bf16cd | 720 | kvp_transaction.state = HVUTIL_DEVICE_DYING; |
245ba56a | 721 | cn_del_callback(&kvp_id); |
68c8b39a | 722 | cancel_delayed_work_sync(&kvp_timeout_work); |
e2bb6537 | 723 | cancel_work_sync(&kvp_sendkey_work); |
245ba56a | 724 | } |