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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 | /* | |
49 | * Global state maintained for transaction that is being processed. | |
50 | * Note that only one transaction can be active at any point in time. | |
51 | * | |
52 | * This state is set when we receive a request from the host; we | |
53 | * cleanup this state when the transaction is completed - when we respond | |
54 | * to the host with the key value. | |
55 | */ | |
56 | ||
57 | static struct { | |
58 | bool active; /* transaction status - active or not */ | |
59 | int recv_len; /* number of bytes received. */ | |
fa3d5b85 | 60 | struct hv_kvp_msg *kvp_msg; /* current message */ |
245ba56a KS |
61 | struct vmbus_channel *recv_channel; /* chn we got the request */ |
62 | u64 recv_req_id; /* request ID. */ | |
fa3d5b85 | 63 | void *kvp_context; /* for the channel callback */ |
245ba56a KS |
64 | } kvp_transaction; |
65 | ||
b47a81dc S |
66 | /* |
67 | * Before we can accept KVP messages from the host, we need | |
68 | * to handshake with the user level daemon. This state tracks | |
69 | * if we are in the handshake phase. | |
70 | */ | |
71 | static bool in_hand_shake = true; | |
72 | ||
73 | /* | |
74 | * This state maintains the version number registered by the daemon. | |
75 | */ | |
76 | static int dm_reg_value; | |
77 | ||
e2bb6537 | 78 | static void kvp_send_key(struct work_struct *dummy); |
245ba56a | 79 | |
76e5f813 | 80 | |
03db7724 | 81 | static void kvp_respond_to_host(struct hv_kvp_msg *msg, int error); |
245ba56a | 82 | static void kvp_work_func(struct work_struct *dummy); |
b47a81dc | 83 | static void kvp_register(int); |
245ba56a KS |
84 | |
85 | static DECLARE_DELAYED_WORK(kvp_work, kvp_work_func); | |
e2bb6537 | 86 | static DECLARE_WORK(kvp_sendkey_work, kvp_send_key); |
245ba56a KS |
87 | |
88 | static struct cb_id kvp_id = { CN_KVP_IDX, CN_KVP_VAL }; | |
89 | static const char kvp_name[] = "kvp_kernel_module"; | |
245ba56a KS |
90 | static u8 *recv_buffer; |
91 | /* | |
92 | * Register the kernel component with the user-level daemon. | |
93 | * As part of this registration, pass the LIC version number. | |
cfc25993 | 94 | * This number has no meaning, it satisfies the registration protocol. |
245ba56a | 95 | */ |
cfc25993 | 96 | #define HV_DRV_VERSION "3.1" |
245ba56a KS |
97 | |
98 | static void | |
b47a81dc | 99 | kvp_register(int reg_value) |
245ba56a KS |
100 | { |
101 | ||
102 | struct cn_msg *msg; | |
26403354 S |
103 | struct hv_kvp_msg *kvp_msg; |
104 | char *version; | |
245ba56a | 105 | |
26403354 | 106 | msg = kzalloc(sizeof(*msg) + sizeof(struct hv_kvp_msg), GFP_ATOMIC); |
245ba56a KS |
107 | |
108 | if (msg) { | |
26403354 | 109 | kvp_msg = (struct hv_kvp_msg *)msg->data; |
e485ceac | 110 | version = kvp_msg->body.kvp_register.version; |
245ba56a KS |
111 | msg->id.idx = CN_KVP_IDX; |
112 | msg->id.val = CN_KVP_VAL; | |
26403354 | 113 | |
b47a81dc | 114 | kvp_msg->kvp_hdr.operation = reg_value; |
26403354 S |
115 | strcpy(version, HV_DRV_VERSION); |
116 | msg->len = sizeof(struct hv_kvp_msg); | |
ac8f7330 | 117 | cn_netlink_send(msg, 0, 0, GFP_ATOMIC); |
245ba56a KS |
118 | kfree(msg); |
119 | } | |
120 | } | |
121 | static void | |
122 | kvp_work_func(struct work_struct *dummy) | |
123 | { | |
124 | /* | |
125 | * If the timer fires, the user-mode component has not responded; | |
126 | * process the pending transaction. | |
127 | */ | |
03db7724 | 128 | kvp_respond_to_host(NULL, HV_E_FAIL); |
b47a81dc S |
129 | } |
130 | ||
131 | static int kvp_handle_handshake(struct hv_kvp_msg *msg) | |
132 | { | |
133 | int ret = 1; | |
134 | ||
135 | switch (msg->kvp_hdr.operation) { | |
136 | case KVP_OP_REGISTER: | |
137 | dm_reg_value = KVP_OP_REGISTER; | |
138 | pr_info("KVP: IP injection functionality not available\n"); | |
139 | pr_info("KVP: Upgrade the KVP daemon\n"); | |
140 | break; | |
141 | case KVP_OP_REGISTER1: | |
142 | dm_reg_value = KVP_OP_REGISTER1; | |
143 | break; | |
144 | default: | |
145 | pr_info("KVP: incompatible daemon\n"); | |
146 | pr_info("KVP: KVP version: %d, Daemon version: %d\n", | |
147 | KVP_OP_REGISTER1, msg->kvp_hdr.operation); | |
148 | ret = 0; | |
149 | } | |
150 | ||
151 | if (ret) { | |
152 | /* | |
153 | * We have a compatible daemon; complete the handshake. | |
154 | */ | |
155 | pr_info("KVP: user-mode registering done.\n"); | |
156 | kvp_register(dm_reg_value); | |
157 | kvp_transaction.active = false; | |
8efe78fd VK |
158 | hv_poll_channel(kvp_transaction.kvp_context, |
159 | hv_kvp_onchannelcallback); | |
b47a81dc S |
160 | } |
161 | return ret; | |
245ba56a KS |
162 | } |
163 | ||
b47a81dc | 164 | |
245ba56a KS |
165 | /* |
166 | * Callback when data is received from user mode. | |
167 | */ | |
168 | ||
169 | static void | |
170 | kvp_cn_callback(struct cn_msg *msg, struct netlink_skb_parms *nsp) | |
171 | { | |
26403354 S |
172 | struct hv_kvp_msg *message; |
173 | struct hv_kvp_msg_enumerate *data; | |
b47a81dc | 174 | int error = 0; |
245ba56a | 175 | |
26403354 | 176 | message = (struct hv_kvp_msg *)msg->data; |
b47a81dc S |
177 | |
178 | /* | |
179 | * If we are negotiating the version information | |
180 | * with the daemon; handle that first. | |
181 | */ | |
182 | ||
183 | if (in_hand_shake) { | |
184 | if (kvp_handle_handshake(message)) | |
185 | in_hand_shake = false; | |
186 | return; | |
187 | } | |
188 | ||
189 | /* | |
190 | * Based on the version of the daemon, we propagate errors from the | |
191 | * daemon differently. | |
192 | */ | |
193 | ||
194 | data = &message->body.kvp_enum_data; | |
195 | ||
196 | switch (dm_reg_value) { | |
fa3d5b85 | 197 | case KVP_OP_REGISTER: |
b47a81dc S |
198 | /* |
199 | * Null string is used to pass back error condition. | |
200 | */ | |
201 | if (data->data.key[0] == 0) | |
202 | error = HV_S_CONT; | |
fa3d5b85 | 203 | break; |
245ba56a | 204 | |
b47a81dc | 205 | case KVP_OP_REGISTER1: |
245ba56a | 206 | /* |
b47a81dc S |
207 | * We use the message header information from |
208 | * the user level daemon to transmit errors. | |
245ba56a | 209 | */ |
b47a81dc S |
210 | error = message->error; |
211 | break; | |
245ba56a | 212 | } |
b47a81dc S |
213 | |
214 | /* | |
215 | * Complete the transaction by forwarding the key value | |
216 | * to the host. But first, cancel the timeout. | |
217 | */ | |
218 | if (cancel_delayed_work_sync(&kvp_work)) | |
03db7724 | 219 | kvp_respond_to_host(message, error); |
245ba56a KS |
220 | } |
221 | ||
03db7724 S |
222 | |
223 | static int process_ob_ipinfo(void *in_msg, void *out_msg, int op) | |
224 | { | |
225 | struct hv_kvp_msg *in = in_msg; | |
226 | struct hv_kvp_ip_msg *out = out_msg; | |
227 | int len; | |
228 | ||
229 | switch (op) { | |
230 | case KVP_OP_GET_IP_INFO: | |
231 | /* | |
232 | * Transform all parameters into utf16 encoding. | |
233 | */ | |
234 | len = utf8s_to_utf16s((char *)in->body.kvp_ip_val.ip_addr, | |
235 | strlen((char *)in->body.kvp_ip_val.ip_addr), | |
236 | UTF16_HOST_ENDIAN, | |
237 | (wchar_t *)out->kvp_ip_val.ip_addr, | |
238 | MAX_IP_ADDR_SIZE); | |
239 | if (len < 0) | |
240 | return len; | |
241 | ||
242 | len = utf8s_to_utf16s((char *)in->body.kvp_ip_val.sub_net, | |
243 | strlen((char *)in->body.kvp_ip_val.sub_net), | |
244 | UTF16_HOST_ENDIAN, | |
245 | (wchar_t *)out->kvp_ip_val.sub_net, | |
246 | MAX_IP_ADDR_SIZE); | |
247 | if (len < 0) | |
248 | return len; | |
249 | ||
250 | len = utf8s_to_utf16s((char *)in->body.kvp_ip_val.gate_way, | |
251 | strlen((char *)in->body.kvp_ip_val.gate_way), | |
252 | UTF16_HOST_ENDIAN, | |
253 | (wchar_t *)out->kvp_ip_val.gate_way, | |
254 | MAX_GATEWAY_SIZE); | |
255 | if (len < 0) | |
256 | return len; | |
257 | ||
258 | len = utf8s_to_utf16s((char *)in->body.kvp_ip_val.dns_addr, | |
259 | strlen((char *)in->body.kvp_ip_val.dns_addr), | |
260 | UTF16_HOST_ENDIAN, | |
261 | (wchar_t *)out->kvp_ip_val.dns_addr, | |
262 | MAX_IP_ADDR_SIZE); | |
263 | if (len < 0) | |
264 | return len; | |
265 | ||
266 | len = utf8s_to_utf16s((char *)in->body.kvp_ip_val.adapter_id, | |
267 | strlen((char *)in->body.kvp_ip_val.adapter_id), | |
268 | UTF16_HOST_ENDIAN, | |
269 | (wchar_t *)out->kvp_ip_val.adapter_id, | |
270 | MAX_IP_ADDR_SIZE); | |
271 | if (len < 0) | |
272 | return len; | |
273 | ||
274 | out->kvp_ip_val.dhcp_enabled = | |
275 | in->body.kvp_ip_val.dhcp_enabled; | |
a500e0e7 S |
276 | out->kvp_ip_val.addr_family = |
277 | in->body.kvp_ip_val.addr_family; | |
03db7724 S |
278 | } |
279 | ||
280 | return 0; | |
281 | } | |
282 | ||
283 | static void process_ib_ipinfo(void *in_msg, void *out_msg, int op) | |
284 | { | |
285 | struct hv_kvp_ip_msg *in = in_msg; | |
286 | struct hv_kvp_msg *out = out_msg; | |
287 | ||
288 | switch (op) { | |
289 | case KVP_OP_SET_IP_INFO: | |
290 | /* | |
291 | * Transform all parameters into utf8 encoding. | |
292 | */ | |
293 | utf16s_to_utf8s((wchar_t *)in->kvp_ip_val.ip_addr, | |
294 | MAX_IP_ADDR_SIZE, | |
295 | UTF16_LITTLE_ENDIAN, | |
296 | (__u8 *)out->body.kvp_ip_val.ip_addr, | |
297 | MAX_IP_ADDR_SIZE); | |
298 | ||
299 | utf16s_to_utf8s((wchar_t *)in->kvp_ip_val.sub_net, | |
300 | MAX_IP_ADDR_SIZE, | |
301 | UTF16_LITTLE_ENDIAN, | |
302 | (__u8 *)out->body.kvp_ip_val.sub_net, | |
303 | MAX_IP_ADDR_SIZE); | |
304 | ||
305 | utf16s_to_utf8s((wchar_t *)in->kvp_ip_val.gate_way, | |
306 | MAX_GATEWAY_SIZE, | |
307 | UTF16_LITTLE_ENDIAN, | |
308 | (__u8 *)out->body.kvp_ip_val.gate_way, | |
309 | MAX_GATEWAY_SIZE); | |
310 | ||
311 | utf16s_to_utf8s((wchar_t *)in->kvp_ip_val.dns_addr, | |
312 | MAX_IP_ADDR_SIZE, | |
313 | UTF16_LITTLE_ENDIAN, | |
314 | (__u8 *)out->body.kvp_ip_val.dns_addr, | |
315 | MAX_IP_ADDR_SIZE); | |
316 | ||
317 | out->body.kvp_ip_val.dhcp_enabled = in->kvp_ip_val.dhcp_enabled; | |
318 | ||
319 | default: | |
320 | utf16s_to_utf8s((wchar_t *)in->kvp_ip_val.adapter_id, | |
321 | MAX_ADAPTER_ID_SIZE, | |
322 | UTF16_LITTLE_ENDIAN, | |
323 | (__u8 *)out->body.kvp_ip_val.adapter_id, | |
324 | MAX_ADAPTER_ID_SIZE); | |
325 | ||
326 | out->body.kvp_ip_val.addr_family = in->kvp_ip_val.addr_family; | |
327 | } | |
328 | } | |
329 | ||
330 | ||
331 | ||
332 | ||
e2bb6537 S |
333 | static void |
334 | kvp_send_key(struct work_struct *dummy) | |
245ba56a KS |
335 | { |
336 | struct cn_msg *msg; | |
26403354 | 337 | struct hv_kvp_msg *message; |
fa3d5b85 S |
338 | struct hv_kvp_msg *in_msg; |
339 | __u8 operation = kvp_transaction.kvp_msg->kvp_hdr.operation; | |
340 | __u8 pool = kvp_transaction.kvp_msg->kvp_hdr.pool; | |
341 | __u32 val32; | |
342 | __u64 val64; | |
8d9560eb | 343 | int rc; |
245ba56a KS |
344 | |
345 | msg = kzalloc(sizeof(*msg) + sizeof(struct hv_kvp_msg) , GFP_ATOMIC); | |
fa3d5b85 S |
346 | if (!msg) |
347 | return; | |
245ba56a | 348 | |
fa3d5b85 S |
349 | msg->id.idx = CN_KVP_IDX; |
350 | msg->id.val = CN_KVP_VAL; | |
26403354 | 351 | |
fa3d5b85 S |
352 | message = (struct hv_kvp_msg *)msg->data; |
353 | message->kvp_hdr.operation = operation; | |
354 | message->kvp_hdr.pool = pool; | |
355 | in_msg = kvp_transaction.kvp_msg; | |
356 | ||
357 | /* | |
358 | * The key/value strings sent from the host are encoded in | |
359 | * in utf16; convert it to utf8 strings. | |
360 | * The host assures us that the utf16 strings will not exceed | |
361 | * the max lengths specified. We will however, reserve room | |
362 | * for the string terminating character - in the utf16s_utf8s() | |
363 | * function we limit the size of the buffer where the converted | |
364 | * string is placed to HV_KVP_EXCHANGE_MAX_*_SIZE -1 to gaurantee | |
365 | * that the strings can be properly terminated! | |
366 | */ | |
367 | ||
368 | switch (message->kvp_hdr.operation) { | |
03db7724 S |
369 | case KVP_OP_SET_IP_INFO: |
370 | process_ib_ipinfo(in_msg, message, KVP_OP_SET_IP_INFO); | |
371 | break; | |
372 | case KVP_OP_GET_IP_INFO: | |
373 | process_ib_ipinfo(in_msg, message, KVP_OP_GET_IP_INFO); | |
374 | break; | |
fa3d5b85 S |
375 | case KVP_OP_SET: |
376 | switch (in_msg->body.kvp_set.data.value_type) { | |
377 | case REG_SZ: | |
378 | /* | |
379 | * The value is a string - utf16 encoding. | |
380 | */ | |
381 | message->body.kvp_set.data.value_size = | |
382 | utf16s_to_utf8s( | |
383 | (wchar_t *)in_msg->body.kvp_set.data.value, | |
384 | in_msg->body.kvp_set.data.value_size, | |
385 | UTF16_LITTLE_ENDIAN, | |
386 | message->body.kvp_set.data.value, | |
387 | HV_KVP_EXCHANGE_MAX_VALUE_SIZE - 1) + 1; | |
388 | break; | |
389 | ||
390 | case REG_U32: | |
391 | /* | |
392 | * The value is a 32 bit scalar. | |
393 | * We save this as a utf8 string. | |
394 | */ | |
395 | val32 = in_msg->body.kvp_set.data.value_u32; | |
396 | message->body.kvp_set.data.value_size = | |
397 | sprintf(message->body.kvp_set.data.value, | |
398 | "%d", val32) + 1; | |
399 | break; | |
400 | ||
401 | case REG_U64: | |
402 | /* | |
403 | * The value is a 64 bit scalar. | |
404 | * We save this as a utf8 string. | |
405 | */ | |
406 | val64 = in_msg->body.kvp_set.data.value_u64; | |
407 | message->body.kvp_set.data.value_size = | |
408 | sprintf(message->body.kvp_set.data.value, | |
409 | "%llu", val64) + 1; | |
410 | break; | |
411 | ||
412 | } | |
413 | case KVP_OP_GET: | |
414 | message->body.kvp_set.data.key_size = | |
415 | utf16s_to_utf8s( | |
416 | (wchar_t *)in_msg->body.kvp_set.data.key, | |
417 | in_msg->body.kvp_set.data.key_size, | |
418 | UTF16_LITTLE_ENDIAN, | |
419 | message->body.kvp_set.data.key, | |
420 | HV_KVP_EXCHANGE_MAX_KEY_SIZE - 1) + 1; | |
421 | break; | |
422 | ||
423 | case KVP_OP_DELETE: | |
424 | message->body.kvp_delete.key_size = | |
425 | utf16s_to_utf8s( | |
426 | (wchar_t *)in_msg->body.kvp_delete.key, | |
427 | in_msg->body.kvp_delete.key_size, | |
428 | UTF16_LITTLE_ENDIAN, | |
429 | message->body.kvp_delete.key, | |
430 | HV_KVP_EXCHANGE_MAX_KEY_SIZE - 1) + 1; | |
431 | break; | |
432 | ||
433 | case KVP_OP_ENUMERATE: | |
434 | message->body.kvp_enum_data.index = | |
435 | in_msg->body.kvp_enum_data.index; | |
436 | break; | |
245ba56a | 437 | } |
fa3d5b85 S |
438 | |
439 | msg->len = sizeof(struct hv_kvp_msg); | |
8d9560eb VK |
440 | rc = cn_netlink_send(msg, 0, 0, GFP_ATOMIC); |
441 | if (rc) { | |
442 | pr_debug("KVP: failed to communicate to the daemon: %d\n", rc); | |
443 | if (cancel_delayed_work_sync(&kvp_work)) | |
444 | kvp_respond_to_host(message, HV_E_FAIL); | |
445 | } | |
446 | ||
fa3d5b85 S |
447 | kfree(msg); |
448 | ||
e2bb6537 | 449 | return; |
245ba56a KS |
450 | } |
451 | ||
452 | /* | |
453 | * Send a response back to the host. | |
454 | */ | |
455 | ||
456 | static void | |
03db7724 | 457 | kvp_respond_to_host(struct hv_kvp_msg *msg_to_host, int error) |
245ba56a KS |
458 | { |
459 | struct hv_kvp_msg *kvp_msg; | |
fa3d5b85 | 460 | struct hv_kvp_exchg_msg_value *kvp_data; |
245ba56a | 461 | char *key_name; |
03db7724 | 462 | char *value; |
245ba56a | 463 | struct icmsg_hdr *icmsghdrp; |
fa3d5b85 S |
464 | int keylen = 0; |
465 | int valuelen = 0; | |
245ba56a KS |
466 | u32 buf_len; |
467 | struct vmbus_channel *channel; | |
468 | u64 req_id; | |
03db7724 | 469 | int ret; |
245ba56a KS |
470 | |
471 | /* | |
472 | * If a transaction is not active; log and return. | |
473 | */ | |
474 | ||
475 | if (!kvp_transaction.active) { | |
476 | /* | |
477 | * This is a spurious call! | |
478 | */ | |
af7a5b6e | 479 | pr_warn("KVP: Transaction not active\n"); |
245ba56a KS |
480 | return; |
481 | } | |
482 | /* | |
483 | * Copy the global state for completing the transaction. Note that | |
484 | * only one transaction can be active at a time. | |
485 | */ | |
486 | ||
487 | buf_len = kvp_transaction.recv_len; | |
488 | channel = kvp_transaction.recv_channel; | |
489 | req_id = kvp_transaction.recv_req_id; | |
490 | ||
76e5f813 S |
491 | kvp_transaction.active = false; |
492 | ||
fa3d5b85 S |
493 | icmsghdrp = (struct icmsg_hdr *) |
494 | &recv_buffer[sizeof(struct vmbuspipe_hdr)]; | |
495 | ||
4e65f6e8 S |
496 | if (channel->onchannel_callback == NULL) |
497 | /* | |
498 | * We have raced with util driver being unloaded; | |
499 | * silently return. | |
500 | */ | |
501 | return; | |
502 | ||
b47a81dc | 503 | icmsghdrp->status = error; |
245ba56a KS |
504 | |
505 | /* | |
adc80ae6 S |
506 | * If the error parameter is set, terminate the host's enumeration |
507 | * on this pool. | |
245ba56a KS |
508 | */ |
509 | if (error) { | |
510 | /* | |
b47a81dc S |
511 | * Something failed or we have timedout; |
512 | * terminate the current host-side iteration. | |
245ba56a | 513 | */ |
245ba56a KS |
514 | goto response_done; |
515 | } | |
516 | ||
fa3d5b85 S |
517 | kvp_msg = (struct hv_kvp_msg *) |
518 | &recv_buffer[sizeof(struct vmbuspipe_hdr) + | |
519 | sizeof(struct icmsg_hdr)]; | |
520 | ||
521 | switch (kvp_transaction.kvp_msg->kvp_hdr.operation) { | |
03db7724 S |
522 | case KVP_OP_GET_IP_INFO: |
523 | ret = process_ob_ipinfo(msg_to_host, | |
524 | (struct hv_kvp_ip_msg *)kvp_msg, | |
525 | KVP_OP_GET_IP_INFO); | |
526 | if (ret < 0) | |
527 | icmsghdrp->status = HV_E_FAIL; | |
528 | ||
529 | goto response_done; | |
530 | case KVP_OP_SET_IP_INFO: | |
531 | goto response_done; | |
fa3d5b85 S |
532 | case KVP_OP_GET: |
533 | kvp_data = &kvp_msg->body.kvp_get.data; | |
534 | goto copy_value; | |
535 | ||
536 | case KVP_OP_SET: | |
537 | case KVP_OP_DELETE: | |
538 | goto response_done; | |
539 | ||
540 | default: | |
541 | break; | |
542 | } | |
543 | ||
544 | kvp_data = &kvp_msg->body.kvp_enum_data.data; | |
03db7724 | 545 | key_name = msg_to_host->body.kvp_enum_data.data.key; |
fa3d5b85 | 546 | |
245ba56a KS |
547 | /* |
548 | * The windows host expects the key/value pair to be encoded | |
fa3d5b85 S |
549 | * in utf16. Ensure that the key/value size reported to the host |
550 | * will be less than or equal to the MAX size (including the | |
551 | * terminating character). | |
245ba56a | 552 | */ |
0720a06a | 553 | keylen = utf8s_to_utf16s(key_name, strlen(key_name), UTF16_HOST_ENDIAN, |
fa3d5b85 S |
554 | (wchar_t *) kvp_data->key, |
555 | (HV_KVP_EXCHANGE_MAX_KEY_SIZE / 2) - 2); | |
556 | kvp_data->key_size = 2*(keylen + 1); /* utf16 encoding */ | |
557 | ||
558 | copy_value: | |
03db7724 | 559 | value = msg_to_host->body.kvp_enum_data.data.value; |
0720a06a | 560 | valuelen = utf8s_to_utf16s(value, strlen(value), UTF16_HOST_ENDIAN, |
fa3d5b85 S |
561 | (wchar_t *) kvp_data->value, |
562 | (HV_KVP_EXCHANGE_MAX_VALUE_SIZE / 2) - 2); | |
563 | kvp_data->value_size = 2*(valuelen + 1); /* utf16 encoding */ | |
245ba56a | 564 | |
fa3d5b85 S |
565 | /* |
566 | * If the utf8s to utf16s conversion failed; notify host | |
567 | * of the error. | |
568 | */ | |
569 | if ((keylen < 0) || (valuelen < 0)) | |
570 | icmsghdrp->status = HV_E_FAIL; | |
571 | ||
572 | kvp_data->value_type = REG_SZ; /* all our values are strings */ | |
245ba56a KS |
573 | |
574 | response_done: | |
575 | icmsghdrp->icflags = ICMSGHDRFLAG_TRANSACTION | ICMSGHDRFLAG_RESPONSE; | |
576 | ||
577 | vmbus_sendpacket(channel, recv_buffer, buf_len, req_id, | |
415f2287 | 578 | VM_PKT_DATA_INBAND, 0); |
8efe78fd | 579 | hv_poll_channel(channel, hv_kvp_onchannelcallback); |
245ba56a KS |
580 | } |
581 | ||
582 | /* | |
583 | * This callback is invoked when we get a KVP message from the host. | |
584 | * The host ensures that only one KVP transaction can be active at a time. | |
585 | * KVP implementation in Linux needs to forward the key to a user-mde | |
586 | * component to retrive the corresponding value. Consequently, we cannot | |
587 | * respond to the host in the conext of this callback. Since the host | |
588 | * guarantees that at most only one transaction can be active at a time, | |
589 | * we stash away the transaction state in a set of global variables. | |
590 | */ | |
591 | ||
592 | void hv_kvp_onchannelcallback(void *context) | |
593 | { | |
594 | struct vmbus_channel *channel = context; | |
595 | u32 recvlen; | |
596 | u64 requestid; | |
597 | ||
598 | struct hv_kvp_msg *kvp_msg; | |
245ba56a KS |
599 | |
600 | struct icmsg_hdr *icmsghdrp; | |
601 | struct icmsg_negotiate *negop = NULL; | |
3a491605 S |
602 | int util_fw_version; |
603 | int kvp_srv_version; | |
245ba56a | 604 | |
fa3d5b85 S |
605 | if (kvp_transaction.active) { |
606 | /* | |
607 | * We will defer processing this callback once | |
608 | * the current transaction is complete. | |
609 | */ | |
610 | kvp_transaction.kvp_context = context; | |
611 | return; | |
612 | } | |
5fa97480 | 613 | kvp_transaction.kvp_context = NULL; |
245ba56a | 614 | |
9bd2d0df | 615 | vmbus_recvpacket(channel, recv_buffer, PAGE_SIZE * 4, &recvlen, |
03db7724 | 616 | &requestid); |
245ba56a KS |
617 | |
618 | if (recvlen > 0) { | |
245ba56a KS |
619 | icmsghdrp = (struct icmsg_hdr *)&recv_buffer[ |
620 | sizeof(struct vmbuspipe_hdr)]; | |
621 | ||
622 | if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) { | |
6741335b | 623 | /* |
3a491605 S |
624 | * Based on the host, select appropriate |
625 | * framework and service versions we will | |
626 | * negotiate. | |
6741335b | 627 | */ |
3a491605 S |
628 | switch (vmbus_proto_version) { |
629 | case (VERSION_WS2008): | |
630 | util_fw_version = UTIL_WS2K8_FW_VERSION; | |
631 | kvp_srv_version = WS2008_SRV_VERSION; | |
632 | break; | |
633 | case (VERSION_WIN7): | |
634 | util_fw_version = UTIL_FW_VERSION; | |
635 | kvp_srv_version = WIN7_SRV_VERSION; | |
636 | break; | |
637 | default: | |
638 | util_fw_version = UTIL_FW_VERSION; | |
639 | kvp_srv_version = WIN8_SRV_VERSION; | |
640 | } | |
c836d0ab | 641 | vmbus_prep_negotiate_resp(icmsghdrp, negop, |
3a491605 S |
642 | recv_buffer, util_fw_version, |
643 | kvp_srv_version); | |
6741335b | 644 | |
245ba56a KS |
645 | } else { |
646 | kvp_msg = (struct hv_kvp_msg *)&recv_buffer[ | |
647 | sizeof(struct vmbuspipe_hdr) + | |
648 | sizeof(struct icmsg_hdr)]; | |
649 | ||
245ba56a KS |
650 | /* |
651 | * Stash away this global state for completing the | |
652 | * transaction; note transactions are serialized. | |
653 | */ | |
fa3d5b85 | 654 | |
245ba56a KS |
655 | kvp_transaction.recv_len = recvlen; |
656 | kvp_transaction.recv_channel = channel; | |
657 | kvp_transaction.recv_req_id = requestid; | |
658 | kvp_transaction.active = true; | |
fa3d5b85 | 659 | kvp_transaction.kvp_msg = kvp_msg; |
245ba56a KS |
660 | |
661 | /* | |
662 | * Get the information from the | |
663 | * user-mode component. | |
664 | * component. This transaction will be | |
665 | * completed when we get the value from | |
666 | * the user-mode component. | |
667 | * Set a timeout to deal with | |
668 | * user-mode not responding. | |
669 | */ | |
e2bb6537 S |
670 | schedule_work(&kvp_sendkey_work); |
671 | schedule_delayed_work(&kvp_work, 5*HZ); | |
245ba56a KS |
672 | |
673 | return; | |
674 | ||
675 | } | |
676 | ||
245ba56a KS |
677 | icmsghdrp->icflags = ICMSGHDRFLAG_TRANSACTION |
678 | | ICMSGHDRFLAG_RESPONSE; | |
679 | ||
680 | vmbus_sendpacket(channel, recv_buffer, | |
681 | recvlen, requestid, | |
415f2287 | 682 | VM_PKT_DATA_INBAND, 0); |
245ba56a KS |
683 | } |
684 | ||
685 | } | |
686 | ||
687 | int | |
a29b643c | 688 | hv_kvp_init(struct hv_util_service *srv) |
245ba56a KS |
689 | { |
690 | int err; | |
691 | ||
692 | err = cn_add_callback(&kvp_id, kvp_name, kvp_cn_callback); | |
693 | if (err) | |
694 | return err; | |
a29b643c | 695 | recv_buffer = srv->recv_buffer; |
245ba56a | 696 | |
fa3d5b85 S |
697 | /* |
698 | * When this driver loads, the user level daemon that | |
699 | * processes the host requests may not yet be running. | |
700 | * Defer processing channel callbacks until the daemon | |
701 | * has registered. | |
702 | */ | |
703 | kvp_transaction.active = true; | |
704 | ||
245ba56a KS |
705 | return 0; |
706 | } | |
707 | ||
708 | void hv_kvp_deinit(void) | |
709 | { | |
710 | cn_del_callback(&kvp_id); | |
711 | cancel_delayed_work_sync(&kvp_work); | |
e2bb6537 | 712 | cancel_work_sync(&kvp_sendkey_work); |
245ba56a | 713 | } |