Commit | Line | Data |
---|---|---|
3e7ee490 | 1 | /* |
3e7ee490 HJ |
2 | * Copyright (c) 2009, Microsoft Corporation. |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms and conditions of the GNU General Public License, | |
6 | * version 2, as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., 59 Temple | |
15 | * Place - Suite 330, Boston, MA 02111-1307 USA. | |
16 | * | |
17 | * Authors: | |
18 | * Haiyang Zhang <haiyangz@microsoft.com> | |
19 | * Hank Janssen <hjanssen@microsoft.com> | |
3e7ee490 | 20 | */ |
0a46618d HJ |
21 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
22 | ||
a0086dc5 | 23 | #include <linux/kernel.h> |
0c3b7b2f S |
24 | #include <linux/sched.h> |
25 | #include <linux/wait.h> | |
a0086dc5 | 26 | #include <linux/mm.h> |
5a0e3ad6 | 27 | #include <linux/slab.h> |
53af545b | 28 | #include <linux/list.h> |
c88c4e4c | 29 | #include <linux/module.h> |
8b5d6d3b | 30 | #include <linux/completion.h> |
e3fe0bb6 | 31 | #include "hv_api.h" |
645954c5 | 32 | #include "logging.h" |
72daf320 | 33 | #include "vmbus_private.h" |
c88c4e4c | 34 | #include "utils.h" |
3e7ee490 | 35 | |
1d7e907f | 36 | struct vmbus_channel_message_table_entry { |
cf9dcba7 | 37 | enum vmbus_channel_message_type message_type; |
fa90f1de | 38 | void (*message_handler)(struct vmbus_channel_message_header *msg); |
1d7e907f | 39 | }; |
3e7ee490 | 40 | |
245ba56a KS |
41 | #define MAX_MSG_TYPES 4 |
42 | #define MAX_NUM_DEVICE_CLASSES_SUPPORTED 8 | |
c88c4e4c | 43 | |
bd60c33e | 44 | static const struct hv_guid |
50b03266 | 45 | supported_device_classes[MAX_NUM_DEVICE_CLASSES_SUPPORTED] = { |
454f18a9 | 46 | /* {ba6163d9-04a1-4d29-b605-72e2ffb1dc7f} */ |
caf26a31 GKH |
47 | /* Storage - SCSI */ |
48 | { | |
49 | .data = { | |
50 | 0xd9, 0x63, 0x61, 0xba, 0xa1, 0x04, 0x29, 0x4d, | |
51 | 0xb6, 0x05, 0x72, 0xe2, 0xff, 0xb1, 0xdc, 0x7f | |
52 | } | |
53 | }, | |
54 | ||
454f18a9 | 55 | /* {F8615163-DF3E-46c5-913F-F2D2F965ED0E} */ |
caf26a31 GKH |
56 | /* Network */ |
57 | { | |
58 | .data = { | |
59 | 0x63, 0x51, 0x61, 0xF8, 0x3E, 0xDF, 0xc5, 0x46, | |
60 | 0x91, 0x3F, 0xF2, 0xD2, 0xF9, 0x65, 0xED, 0x0E | |
61 | } | |
62 | }, | |
63 | ||
454f18a9 | 64 | /* {CFA8B69E-5B4A-4cc0-B98B-8BA1A1F3F95A} */ |
caf26a31 GKH |
65 | /* Input */ |
66 | { | |
67 | .data = { | |
68 | 0x9E, 0xB6, 0xA8, 0xCF, 0x4A, 0x5B, 0xc0, 0x4c, | |
69 | 0xB9, 0x8B, 0x8B, 0xA1, 0xA1, 0xF3, 0xF9, 0x5A | |
70 | } | |
71 | }, | |
3e7ee490 | 72 | |
caf26a31 GKH |
73 | /* {32412632-86cb-44a2-9b5c-50d1417354f5} */ |
74 | /* IDE */ | |
75 | { | |
76 | .data = { | |
77 | 0x32, 0x26, 0x41, 0x32, 0xcb, 0x86, 0xa2, 0x44, | |
78 | 0x9b, 0x5c, 0x50, 0xd1, 0x41, 0x73, 0x54, 0xf5 | |
79 | } | |
80 | }, | |
c88c4e4c HJ |
81 | /* 0E0B6031-5213-4934-818B-38D90CED39DB */ |
82 | /* Shutdown */ | |
83 | { | |
84 | .data = { | |
85 | 0x31, 0x60, 0x0B, 0X0E, 0x13, 0x52, 0x34, 0x49, | |
86 | 0x81, 0x8B, 0x38, 0XD9, 0x0C, 0xED, 0x39, 0xDB | |
87 | } | |
88 | }, | |
39c4e9c3 HZ |
89 | /* {9527E630-D0AE-497b-ADCE-E80AB0175CAF} */ |
90 | /* TimeSync */ | |
91 | { | |
92 | .data = { | |
93 | 0x30, 0xe6, 0x27, 0x95, 0xae, 0xd0, 0x7b, 0x49, | |
94 | 0xad, 0xce, 0xe8, 0x0a, 0xb0, 0x17, 0x5c, 0xaf | |
95 | } | |
96 | }, | |
9153f7b9 HJ |
97 | /* {57164f39-9115-4e78-ab55-382f3bd5422d} */ |
98 | /* Heartbeat */ | |
99 | { | |
100 | .data = { | |
101 | 0x39, 0x4f, 0x16, 0x57, 0x15, 0x91, 0x78, 0x4e, | |
102 | 0xab, 0x55, 0x38, 0x2f, 0x3b, 0xd5, 0x42, 0x2d | |
103 | } | |
104 | }, | |
245ba56a KS |
105 | /* {A9A0F4E7-5A45-4d96-B827-8A841E8C03E6} */ |
106 | /* KVP */ | |
107 | { | |
108 | .data = { | |
109 | 0xe7, 0xf4, 0xa0, 0xa9, 0x45, 0x5a, 0x96, 0x4d, | |
110 | 0xb8, 0x27, 0x8a, 0x84, 0x1e, 0x8c, 0x3, 0xe6 | |
111 | } | |
112 | }, | |
113 | ||
3e7ee490 HJ |
114 | }; |
115 | ||
c88c4e4c HJ |
116 | |
117 | /** | |
118 | * prep_negotiate_resp() - Create default response for Hyper-V Negotiate message | |
119 | * @icmsghdrp: Pointer to msg header structure | |
120 | * @icmsg_negotiate: Pointer to negotiate message structure | |
121 | * @buf: Raw buffer channel data | |
122 | * | |
123 | * @icmsghdrp is of type &struct icmsg_hdr. | |
124 | * @negop is of type &struct icmsg_negotiate. | |
125 | * Set up and fill in default negotiate response message. This response can | |
126 | * come from both the vmbus driver and the hv_utils driver. The current api | |
127 | * will respond properly to both Windows 2008 and Windows 2008-R2 operating | |
128 | * systems. | |
129 | * | |
130 | * Mainly used by Hyper-V drivers. | |
131 | */ | |
132 | void prep_negotiate_resp(struct icmsg_hdr *icmsghdrp, | |
133 | struct icmsg_negotiate *negop, | |
134 | u8 *buf) | |
135 | { | |
136 | if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) { | |
137 | icmsghdrp->icmsgsize = 0x10; | |
138 | ||
139 | negop = (struct icmsg_negotiate *)&buf[ | |
140 | sizeof(struct vmbuspipe_hdr) + | |
141 | sizeof(struct icmsg_hdr)]; | |
142 | ||
143 | if (negop->icframe_vercnt == 2 && | |
144 | negop->icversion_data[1].major == 3) { | |
145 | negop->icversion_data[0].major = 3; | |
146 | negop->icversion_data[0].minor = 0; | |
147 | negop->icversion_data[1].major = 3; | |
148 | negop->icversion_data[1].minor = 0; | |
149 | } else { | |
150 | negop->icversion_data[0].major = 1; | |
151 | negop->icversion_data[0].minor = 0; | |
152 | negop->icversion_data[1].major = 1; | |
153 | negop->icversion_data[1].minor = 0; | |
154 | } | |
155 | ||
156 | negop->icframe_vercnt = 1; | |
157 | negop->icmsg_vercnt = 1; | |
158 | } | |
159 | } | |
160 | EXPORT_SYMBOL(prep_negotiate_resp); | |
161 | ||
162 | /** | |
163 | * chn_cb_negotiate() - Default handler for non IDE/SCSI/NETWORK | |
164 | * Hyper-V requests | |
165 | * @context: Pointer to argument structure. | |
166 | * | |
167 | * Set up the default handler for non device driver specific requests | |
168 | * from Hyper-V. This stub responds to the default negotiate messages | |
169 | * that come in for every non IDE/SCSI/Network request. | |
170 | * This behavior is normally overwritten in the hv_utils driver. That | |
25985edc | 171 | * driver handles requests like graceful shutdown, heartbeats etc. |
c88c4e4c HJ |
172 | * |
173 | * Mainly used by Hyper-V drivers. | |
174 | */ | |
175 | void chn_cb_negotiate(void *context) | |
176 | { | |
177 | struct vmbus_channel *channel = context; | |
178 | u8 *buf; | |
179 | u32 buflen, recvlen; | |
180 | u64 requestid; | |
181 | ||
182 | struct icmsg_hdr *icmsghdrp; | |
183 | struct icmsg_negotiate *negop = NULL; | |
184 | ||
185 | buflen = PAGE_SIZE; | |
186 | buf = kmalloc(buflen, GFP_ATOMIC); | |
187 | ||
fff41b2e | 188 | vmbus_recvpacket(channel, buf, buflen, &recvlen, &requestid); |
c88c4e4c HJ |
189 | |
190 | if (recvlen > 0) { | |
191 | icmsghdrp = (struct icmsg_hdr *)&buf[ | |
192 | sizeof(struct vmbuspipe_hdr)]; | |
193 | ||
194 | prep_negotiate_resp(icmsghdrp, negop, buf); | |
195 | ||
196 | icmsghdrp->icflags = ICMSGHDRFLAG_TRANSACTION | |
197 | | ICMSGHDRFLAG_RESPONSE; | |
198 | ||
fff41b2e | 199 | vmbus_sendpacket(channel, buf, |
c88c4e4c | 200 | recvlen, requestid, |
415f2287 | 201 | VM_PKT_DATA_INBAND, 0); |
c88c4e4c HJ |
202 | } |
203 | ||
204 | kfree(buf); | |
205 | } | |
206 | EXPORT_SYMBOL(chn_cb_negotiate); | |
207 | ||
208 | /* | |
209 | * Function table used for message responses for non IDE/SCSI/Network type | |
210 | * messages. (Such as KVP/Shutdown etc) | |
211 | */ | |
212 | struct hyperv_service_callback hv_cb_utils[MAX_MSG_TYPES] = { | |
213 | /* 0E0B6031-5213-4934-818B-38D90CED39DB */ | |
214 | /* Shutdown */ | |
215 | { | |
216 | .msg_type = HV_SHUTDOWN_MSG, | |
217 | .data = { | |
218 | 0x31, 0x60, 0x0B, 0X0E, 0x13, 0x52, 0x34, 0x49, | |
219 | 0x81, 0x8B, 0x38, 0XD9, 0x0C, 0xED, 0x39, 0xDB | |
220 | }, | |
221 | .callback = chn_cb_negotiate, | |
222 | .log_msg = "Shutdown channel functionality initialized" | |
223 | }, | |
39c4e9c3 HZ |
224 | |
225 | /* {9527E630-D0AE-497b-ADCE-E80AB0175CAF} */ | |
226 | /* TimeSync */ | |
227 | { | |
228 | .msg_type = HV_TIMESYNC_MSG, | |
229 | .data = { | |
230 | 0x30, 0xe6, 0x27, 0x95, 0xae, 0xd0, 0x7b, 0x49, | |
231 | 0xad, 0xce, 0xe8, 0x0a, 0xb0, 0x17, 0x5c, 0xaf | |
232 | }, | |
233 | .callback = chn_cb_negotiate, | |
234 | .log_msg = "Timesync channel functionality initialized" | |
235 | }, | |
9153f7b9 HJ |
236 | /* {57164f39-9115-4e78-ab55-382f3bd5422d} */ |
237 | /* Heartbeat */ | |
238 | { | |
239 | .msg_type = HV_HEARTBEAT_MSG, | |
240 | .data = { | |
241 | 0x39, 0x4f, 0x16, 0x57, 0x15, 0x91, 0x78, 0x4e, | |
242 | 0xab, 0x55, 0x38, 0x2f, 0x3b, 0xd5, 0x42, 0x2d | |
243 | }, | |
244 | .callback = chn_cb_negotiate, | |
245 | .log_msg = "Heartbeat channel functionality initialized" | |
246 | }, | |
245ba56a KS |
247 | /* {A9A0F4E7-5A45-4d96-B827-8A841E8C03E6} */ |
248 | /* KVP */ | |
249 | { | |
250 | .data = { | |
251 | 0xe7, 0xf4, 0xa0, 0xa9, 0x45, 0x5a, 0x96, 0x4d, | |
252 | 0xb8, 0x27, 0x8a, 0x84, 0x1e, 0x8c, 0x3, 0xe6 | |
253 | }, | |
254 | .callback = chn_cb_negotiate, | |
255 | .log_msg = "KVP channel functionality initialized" | |
256 | }, | |
c88c4e4c HJ |
257 | }; |
258 | EXPORT_SYMBOL(hv_cb_utils); | |
259 | ||
3e189519 | 260 | /* |
e98cb276 | 261 | * alloc_channel - Allocate and initialize a vmbus channel object |
bd60c33e | 262 | */ |
50fe56d2 | 263 | static struct vmbus_channel *alloc_channel(void) |
3e7ee490 | 264 | { |
aded7165 | 265 | struct vmbus_channel *channel; |
3e7ee490 | 266 | |
aded7165 | 267 | channel = kzalloc(sizeof(*channel), GFP_ATOMIC); |
3e7ee490 | 268 | if (!channel) |
3e7ee490 | 269 | return NULL; |
3e7ee490 | 270 | |
54411c42 | 271 | spin_lock_init(&channel->inbound_lock); |
3e7ee490 | 272 | |
c8a429a4 GKH |
273 | init_timer(&channel->poll_timer); |
274 | channel->poll_timer.data = (unsigned long)channel; | |
fff41b2e | 275 | channel->poll_timer.function = vmbus_ontimer; |
3e7ee490 | 276 | |
c50f7fb2 HZ |
277 | channel->controlwq = create_workqueue("hv_vmbus_ctl"); |
278 | if (!channel->controlwq) { | |
8c69f52a | 279 | kfree(channel); |
3e7ee490 HJ |
280 | return NULL; |
281 | } | |
282 | ||
283 | return channel; | |
284 | } | |
285 | ||
3e189519 | 286 | /* |
e98cb276 | 287 | * release_hannel - Release the vmbus channel object itself |
bd60c33e | 288 | */ |
4b2f9abe | 289 | static void release_channel(struct work_struct *work) |
3e7ee490 | 290 | { |
4b2f9abe TT |
291 | struct vmbus_channel *channel = container_of(work, |
292 | struct vmbus_channel, | |
293 | work); | |
3e7ee490 | 294 | |
c50f7fb2 | 295 | destroy_workqueue(channel->controlwq); |
3e7ee490 | 296 | |
8c69f52a | 297 | kfree(channel); |
3e7ee490 HJ |
298 | } |
299 | ||
3e189519 | 300 | /* |
e98cb276 | 301 | * free_channel - Release the resources used by the vmbus channel object |
bd60c33e | 302 | */ |
e98cb276 | 303 | void free_channel(struct vmbus_channel *channel) |
3e7ee490 | 304 | { |
188963ec | 305 | del_timer_sync(&channel->poll_timer); |
3e7ee490 | 306 | |
bd60c33e GKH |
307 | /* |
308 | * We have to release the channel's workqueue/thread in the vmbus's | |
309 | * workqueue/thread context | |
310 | * ie we can't destroy ourselves. | |
311 | */ | |
4b2f9abe | 312 | INIT_WORK(&channel->work, release_channel); |
da9fcb72 | 313 | queue_work(vmbus_connection.work_queue, &channel->work); |
3e7ee490 HJ |
314 | } |
315 | ||
8b5d6d3b HZ |
316 | |
317 | DECLARE_COMPLETION(hv_channel_ready); | |
318 | ||
319 | /* | |
320 | * Count initialized channels, and ensure all channels are ready when hv_vmbus | |
321 | * module loading completes. | |
322 | */ | |
323 | static void count_hv_channel(void) | |
324 | { | |
325 | static int counter; | |
326 | unsigned long flags; | |
327 | ||
15b2f647 | 328 | spin_lock_irqsave(&vmbus_connection.channel_lock, flags); |
8b5d6d3b HZ |
329 | if (++counter == MAX_MSG_TYPES) |
330 | complete(&hv_channel_ready); | |
15b2f647 | 331 | spin_unlock_irqrestore(&vmbus_connection.channel_lock, flags); |
8b5d6d3b HZ |
332 | } |
333 | ||
4b2f9abe TT |
334 | /* |
335 | * vmbus_process_rescind_offer - | |
336 | * Rescind the offer by initiating a device removal | |
337 | */ | |
338 | static void vmbus_process_rescind_offer(struct work_struct *work) | |
339 | { | |
340 | struct vmbus_channel *channel = container_of(work, | |
341 | struct vmbus_channel, | |
342 | work); | |
343 | ||
344 | vmbus_child_device_unregister(channel->device_obj); | |
345 | } | |
8b5d6d3b | 346 | |
3e189519 | 347 | /* |
e98cb276 | 348 | * vmbus_process_offer - Process the offer by creating a channel/device |
c88c4e4c | 349 | * associated with this offer |
bd60c33e | 350 | */ |
4b2f9abe | 351 | static void vmbus_process_offer(struct work_struct *work) |
3e7ee490 | 352 | { |
4b2f9abe TT |
353 | struct vmbus_channel *newchannel = container_of(work, |
354 | struct vmbus_channel, | |
355 | work); | |
aded7165 | 356 | struct vmbus_channel *channel; |
188963ec | 357 | bool fnew = true; |
bd60c33e | 358 | int ret; |
c88c4e4c | 359 | int cnt; |
0f5e44ca | 360 | unsigned long flags; |
3e7ee490 | 361 | |
4b2f9abe TT |
362 | /* The next possible work is rescind handling */ |
363 | INIT_WORK(&newchannel->work, vmbus_process_rescind_offer); | |
364 | ||
454f18a9 | 365 | /* Make sure this is a new offer */ |
15b2f647 | 366 | spin_lock_irqsave(&vmbus_connection.channel_lock, flags); |
3e7ee490 | 367 | |
da9fcb72 | 368 | list_for_each_entry(channel, &vmbus_connection.chn_list, listentry) { |
767dff68 HZ |
369 | if (!memcmp(&channel->offermsg.offer.if_type, |
370 | &newchannel->offermsg.offer.if_type, | |
bd60c33e | 371 | sizeof(struct hv_guid)) && |
767dff68 HZ |
372 | !memcmp(&channel->offermsg.offer.if_instance, |
373 | &newchannel->offermsg.offer.if_instance, | |
bd60c33e | 374 | sizeof(struct hv_guid))) { |
188963ec | 375 | fnew = false; |
3e7ee490 HJ |
376 | break; |
377 | } | |
378 | } | |
379 | ||
188963ec | 380 | if (fnew) |
c50f7fb2 | 381 | list_add_tail(&newchannel->listentry, |
da9fcb72 | 382 | &vmbus_connection.chn_list); |
bd60c33e | 383 | |
15b2f647 | 384 | spin_unlock_irqrestore(&vmbus_connection.channel_lock, flags); |
3e7ee490 | 385 | |
188963ec | 386 | if (!fnew) { |
e98cb276 | 387 | free_channel(newchannel); |
3e7ee490 HJ |
388 | return; |
389 | } | |
390 | ||
bd60c33e GKH |
391 | /* |
392 | * Start the process of binding this offer to the driver | |
393 | * We need to set the DeviceObject field before calling | |
646f1ea3 | 394 | * vmbus_child_dev_add() |
bd60c33e | 395 | */ |
89733aa9 | 396 | newchannel->device_obj = vmbus_child_device_create( |
767dff68 HZ |
397 | &newchannel->offermsg.offer.if_type, |
398 | &newchannel->offermsg.offer.if_instance, | |
188963ec | 399 | newchannel); |
3e7ee490 | 400 | |
454f18a9 BP |
401 | /* |
402 | * Add the new device to the bus. This will kick off device-driver | |
403 | * binding which eventually invokes the device driver's AddDevice() | |
404 | * method. | |
405 | */ | |
e13a0b5a | 406 | ret = vmbus_child_device_register(newchannel->device_obj); |
bd60c33e | 407 | if (ret != 0) { |
0a46618d | 408 | pr_err("unable to add child device object (relid %d)\n", |
c50f7fb2 | 409 | newchannel->offermsg.child_relid); |
3e7ee490 | 410 | |
15b2f647 | 411 | spin_lock_irqsave(&vmbus_connection.channel_lock, flags); |
c50f7fb2 | 412 | list_del(&newchannel->listentry); |
15b2f647 | 413 | spin_unlock_irqrestore(&vmbus_connection.channel_lock, flags); |
3e7ee490 | 414 | |
e98cb276 | 415 | free_channel(newchannel); |
bd60c33e | 416 | } else { |
454f18a9 BP |
417 | /* |
418 | * This state is used to indicate a successful open | |
419 | * so that when we do close the channel normally, we | |
420 | * can cleanup properly | |
421 | */ | |
c50f7fb2 | 422 | newchannel->state = CHANNEL_OPEN_STATE; |
c88c4e4c | 423 | |
8b5d6d3b HZ |
424 | /* Open IC channels */ |
425 | for (cnt = 0; cnt < MAX_MSG_TYPES; cnt++) { | |
767dff68 | 426 | if (memcmp(&newchannel->offermsg.offer.if_type, |
c88c4e4c | 427 | &hv_cb_utils[cnt].data, |
8b5d6d3b | 428 | sizeof(struct hv_guid)) == 0 && |
188963ec | 429 | vmbus_open(newchannel, 2 * PAGE_SIZE, |
8b5d6d3b HZ |
430 | 2 * PAGE_SIZE, NULL, 0, |
431 | hv_cb_utils[cnt].callback, | |
188963ec HZ |
432 | newchannel) == 0) { |
433 | hv_cb_utils[cnt].channel = newchannel; | |
0a46618d HJ |
434 | |
435 | pr_info("%s\n", hv_cb_utils[cnt].log_msg); | |
436 | ||
8b5d6d3b | 437 | count_hv_channel(); |
c88c4e4c | 438 | } |
c88c4e4c | 439 | } |
3e7ee490 | 440 | } |
3e7ee490 HJ |
441 | } |
442 | ||
3e189519 | 443 | /* |
e98cb276 | 444 | * vmbus_onoffer - Handler for channel offers from vmbus in parent partition. |
bd60c33e GKH |
445 | * |
446 | * We ignore all offers except network and storage offers. For each network and | |
447 | * storage offers, we create a channel object and queue a work item to the | |
448 | * channel object to process the offer synchronously | |
449 | */ | |
e98cb276 | 450 | static void vmbus_onoffer(struct vmbus_channel_message_header *hdr) |
3e7ee490 | 451 | { |
bd60c33e | 452 | struct vmbus_channel_offer_channel *offer; |
188963ec HZ |
453 | struct vmbus_channel *newchannel; |
454 | struct hv_guid *guidtype; | |
455 | struct hv_guid *guidinstance; | |
3e7ee490 | 456 | int i; |
188963ec | 457 | int fsupported = 0; |
3e7ee490 | 458 | |
bd60c33e GKH |
459 | offer = (struct vmbus_channel_offer_channel *)hdr; |
460 | for (i = 0; i < MAX_NUM_DEVICE_CLASSES_SUPPORTED; i++) { | |
767dff68 | 461 | if (memcmp(&offer->offer.if_type, |
50b03266 S |
462 | &supported_device_classes[i], |
463 | sizeof(struct hv_guid)) == 0) { | |
188963ec | 464 | fsupported = 1; |
3e7ee490 HJ |
465 | break; |
466 | } | |
467 | } | |
468 | ||
98e08702 | 469 | if (!fsupported) |
3e7ee490 | 470 | return; |
3e7ee490 | 471 | |
767dff68 HZ |
472 | guidtype = &offer->offer.if_type; |
473 | guidinstance = &offer->offer.if_instance; | |
3e7ee490 | 474 | |
454f18a9 | 475 | /* Allocate the channel object and save this offer. */ |
e98cb276 | 476 | newchannel = alloc_channel(); |
188963ec | 477 | if (!newchannel) { |
0a46618d | 478 | pr_err("Unable to allocate channel object\n"); |
3e7ee490 HJ |
479 | return; |
480 | } | |
481 | ||
c50f7fb2 | 482 | memcpy(&newchannel->offermsg, offer, |
bd60c33e | 483 | sizeof(struct vmbus_channel_offer_channel)); |
c50f7fb2 HZ |
484 | newchannel->monitor_grp = (u8)offer->monitorid / 32; |
485 | newchannel->monitor_bit = (u8)offer->monitorid % 32; | |
3e7ee490 | 486 | |
454f18a9 | 487 | /* TODO: Make sure the offer comes from our parent partition */ |
4b2f9abe TT |
488 | INIT_WORK(&newchannel->work, vmbus_process_offer); |
489 | queue_work(newchannel->controlwq, &newchannel->work); | |
3e7ee490 HJ |
490 | } |
491 | ||
3e189519 | 492 | /* |
e98cb276 | 493 | * vmbus_onoffer_rescind - Rescind offer handler. |
bd60c33e GKH |
494 | * |
495 | * We queue a work item to process this offer synchronously | |
496 | */ | |
e98cb276 | 497 | static void vmbus_onoffer_rescind(struct vmbus_channel_message_header *hdr) |
3e7ee490 | 498 | { |
bd60c33e | 499 | struct vmbus_channel_rescind_offer *rescind; |
aded7165 | 500 | struct vmbus_channel *channel; |
3e7ee490 | 501 | |
bd60c33e | 502 | rescind = (struct vmbus_channel_rescind_offer *)hdr; |
c6977677 | 503 | channel = relid2channel(rescind->child_relid); |
98e08702 HJ |
504 | |
505 | if (channel == NULL) | |
506 | /* Just return here, no channel found */ | |
3e7ee490 | 507 | return; |
3e7ee490 | 508 | |
4b2f9abe TT |
509 | /* work is initialized for vmbus_process_rescind_offer() from |
510 | * vmbus_process_offer() where the channel got created */ | |
511 | queue_work(channel->controlwq, &channel->work); | |
3e7ee490 HJ |
512 | } |
513 | ||
3e189519 | 514 | /* |
e98cb276 HZ |
515 | * vmbus_onoffers_delivered - |
516 | * This is invoked when all offers have been delivered. | |
bd60c33e GKH |
517 | * |
518 | * Nothing to do here. | |
519 | */ | |
e98cb276 | 520 | static void vmbus_onoffers_delivered( |
bd60c33e | 521 | struct vmbus_channel_message_header *hdr) |
3e7ee490 | 522 | { |
3e7ee490 HJ |
523 | } |
524 | ||
3e189519 | 525 | /* |
e98cb276 | 526 | * vmbus_onopen_result - Open result handler. |
bd60c33e GKH |
527 | * |
528 | * This is invoked when we received a response to our channel open request. | |
529 | * Find the matching request, copy the response and signal the requesting | |
530 | * thread. | |
531 | */ | |
e98cb276 | 532 | static void vmbus_onopen_result(struct vmbus_channel_message_header *hdr) |
3e7ee490 | 533 | { |
bd60c33e | 534 | struct vmbus_channel_open_result *result; |
188963ec HZ |
535 | struct vmbus_channel_msginfo *msginfo; |
536 | struct vmbus_channel_message_header *requestheader; | |
537 | struct vmbus_channel_open_channel *openmsg; | |
dd0813b6 | 538 | unsigned long flags; |
3e7ee490 | 539 | |
bd60c33e | 540 | result = (struct vmbus_channel_open_result *)hdr; |
3e7ee490 | 541 | |
bd60c33e GKH |
542 | /* |
543 | * Find the open msg, copy the result and signal/unblock the wait event | |
544 | */ | |
15b2f647 | 545 | spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags); |
3e7ee490 | 546 | |
ebb61e5f HJ |
547 | list_for_each_entry(msginfo, &vmbus_connection.chn_msg_list, |
548 | msglistentry) { | |
188963ec | 549 | requestheader = |
c50f7fb2 | 550 | (struct vmbus_channel_message_header *)msginfo->msg; |
188963ec | 551 | |
c50f7fb2 | 552 | if (requestheader->msgtype == CHANNELMSG_OPENCHANNEL) { |
188963ec | 553 | openmsg = |
c50f7fb2 HZ |
554 | (struct vmbus_channel_open_channel *)msginfo->msg; |
555 | if (openmsg->child_relid == result->child_relid && | |
556 | openmsg->openid == result->openid) { | |
557 | memcpy(&msginfo->response.open_result, | |
bd60c33e GKH |
558 | result, |
559 | sizeof(struct vmbus_channel_open_result)); | |
0c3b7b2f S |
560 | msginfo->wait_condition = 1; |
561 | wake_up(&msginfo->waitevent); | |
3e7ee490 HJ |
562 | break; |
563 | } | |
564 | } | |
565 | } | |
15b2f647 | 566 | spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags); |
3e7ee490 HJ |
567 | } |
568 | ||
3e189519 | 569 | /* |
e98cb276 | 570 | * vmbus_ongpadl_created - GPADL created handler. |
bd60c33e GKH |
571 | * |
572 | * This is invoked when we received a response to our gpadl create request. | |
573 | * Find the matching request, copy the response and signal the requesting | |
574 | * thread. | |
575 | */ | |
e98cb276 | 576 | static void vmbus_ongpadl_created(struct vmbus_channel_message_header *hdr) |
3e7ee490 | 577 | { |
188963ec | 578 | struct vmbus_channel_gpadl_created *gpadlcreated; |
188963ec HZ |
579 | struct vmbus_channel_msginfo *msginfo; |
580 | struct vmbus_channel_message_header *requestheader; | |
581 | struct vmbus_channel_gpadl_header *gpadlheader; | |
dd0813b6 | 582 | unsigned long flags; |
3e7ee490 | 583 | |
188963ec | 584 | gpadlcreated = (struct vmbus_channel_gpadl_created *)hdr; |
3e7ee490 | 585 | |
bd60c33e GKH |
586 | /* |
587 | * Find the establish msg, copy the result and signal/unblock the wait | |
588 | * event | |
589 | */ | |
15b2f647 | 590 | spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags); |
3e7ee490 | 591 | |
ebb61e5f HJ |
592 | list_for_each_entry(msginfo, &vmbus_connection.chn_msg_list, |
593 | msglistentry) { | |
188963ec | 594 | requestheader = |
c50f7fb2 | 595 | (struct vmbus_channel_message_header *)msginfo->msg; |
188963ec | 596 | |
c50f7fb2 | 597 | if (requestheader->msgtype == CHANNELMSG_GPADL_HEADER) { |
188963ec HZ |
598 | gpadlheader = |
599 | (struct vmbus_channel_gpadl_header *)requestheader; | |
600 | ||
c50f7fb2 HZ |
601 | if ((gpadlcreated->child_relid == |
602 | gpadlheader->child_relid) && | |
603 | (gpadlcreated->gpadl == gpadlheader->gpadl)) { | |
604 | memcpy(&msginfo->response.gpadl_created, | |
188963ec | 605 | gpadlcreated, |
bd60c33e | 606 | sizeof(struct vmbus_channel_gpadl_created)); |
0c3b7b2f S |
607 | msginfo->wait_condition = 1; |
608 | wake_up(&msginfo->waitevent); | |
3e7ee490 HJ |
609 | break; |
610 | } | |
611 | } | |
612 | } | |
15b2f647 | 613 | spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags); |
3e7ee490 HJ |
614 | } |
615 | ||
3e189519 | 616 | /* |
e98cb276 | 617 | * vmbus_ongpadl_torndown - GPADL torndown handler. |
bd60c33e GKH |
618 | * |
619 | * This is invoked when we received a response to our gpadl teardown request. | |
620 | * Find the matching request, copy the response and signal the requesting | |
621 | * thread. | |
622 | */ | |
e98cb276 | 623 | static void vmbus_ongpadl_torndown( |
bd60c33e | 624 | struct vmbus_channel_message_header *hdr) |
3e7ee490 | 625 | { |
188963ec | 626 | struct vmbus_channel_gpadl_torndown *gpadl_torndown; |
188963ec HZ |
627 | struct vmbus_channel_msginfo *msginfo; |
628 | struct vmbus_channel_message_header *requestheader; | |
629 | struct vmbus_channel_gpadl_teardown *gpadl_teardown; | |
dd0813b6 | 630 | unsigned long flags; |
3e7ee490 | 631 | |
188963ec | 632 | gpadl_torndown = (struct vmbus_channel_gpadl_torndown *)hdr; |
bd60c33e GKH |
633 | |
634 | /* | |
635 | * Find the open msg, copy the result and signal/unblock the wait event | |
636 | */ | |
15b2f647 | 637 | spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags); |
3e7ee490 | 638 | |
ebb61e5f HJ |
639 | list_for_each_entry(msginfo, &vmbus_connection.chn_msg_list, |
640 | msglistentry) { | |
188963ec | 641 | requestheader = |
c50f7fb2 | 642 | (struct vmbus_channel_message_header *)msginfo->msg; |
3e7ee490 | 643 | |
c50f7fb2 | 644 | if (requestheader->msgtype == CHANNELMSG_GPADL_TEARDOWN) { |
188963ec HZ |
645 | gpadl_teardown = |
646 | (struct vmbus_channel_gpadl_teardown *)requestheader; | |
3e7ee490 | 647 | |
c50f7fb2 HZ |
648 | if (gpadl_torndown->gpadl == gpadl_teardown->gpadl) { |
649 | memcpy(&msginfo->response.gpadl_torndown, | |
188963ec | 650 | gpadl_torndown, |
bd60c33e | 651 | sizeof(struct vmbus_channel_gpadl_torndown)); |
0c3b7b2f S |
652 | msginfo->wait_condition = 1; |
653 | wake_up(&msginfo->waitevent); | |
3e7ee490 HJ |
654 | break; |
655 | } | |
656 | } | |
657 | } | |
15b2f647 | 658 | spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags); |
3e7ee490 HJ |
659 | } |
660 | ||
3e189519 | 661 | /* |
e98cb276 | 662 | * vmbus_onversion_response - Version response handler |
bd60c33e GKH |
663 | * |
664 | * This is invoked when we received a response to our initiate contact request. | |
665 | * Find the matching request, copy the response and signal the requesting | |
666 | * thread. | |
667 | */ | |
e98cb276 | 668 | static void vmbus_onversion_response( |
bd60c33e | 669 | struct vmbus_channel_message_header *hdr) |
3e7ee490 | 670 | { |
188963ec HZ |
671 | struct vmbus_channel_msginfo *msginfo; |
672 | struct vmbus_channel_message_header *requestheader; | |
82250213 | 673 | struct vmbus_channel_initiate_contact *initiate; |
188963ec | 674 | struct vmbus_channel_version_response *version_response; |
dd0813b6 | 675 | unsigned long flags; |
3e7ee490 | 676 | |
188963ec | 677 | version_response = (struct vmbus_channel_version_response *)hdr; |
15b2f647 | 678 | spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags); |
3e7ee490 | 679 | |
ebb61e5f HJ |
680 | list_for_each_entry(msginfo, &vmbus_connection.chn_msg_list, |
681 | msglistentry) { | |
188963ec | 682 | requestheader = |
c50f7fb2 | 683 | (struct vmbus_channel_message_header *)msginfo->msg; |
3e7ee490 | 684 | |
c50f7fb2 HZ |
685 | if (requestheader->msgtype == |
686 | CHANNELMSG_INITIATE_CONTACT) { | |
188963ec HZ |
687 | initiate = |
688 | (struct vmbus_channel_initiate_contact *)requestheader; | |
c50f7fb2 | 689 | memcpy(&msginfo->response.version_response, |
188963ec | 690 | version_response, |
bd60c33e | 691 | sizeof(struct vmbus_channel_version_response)); |
0c3b7b2f S |
692 | msginfo->wait_condition = 1; |
693 | wake_up(&msginfo->waitevent); | |
3e7ee490 HJ |
694 | } |
695 | } | |
15b2f647 | 696 | spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags); |
3e7ee490 HJ |
697 | } |
698 | ||
c8212f04 GKH |
699 | /* Channel message dispatch table */ |
700 | static struct vmbus_channel_message_table_entry | |
c50f7fb2 HZ |
701 | gChannelMessageTable[CHANNELMSG_COUNT] = { |
702 | {CHANNELMSG_INVALID, NULL}, | |
703 | {CHANNELMSG_OFFERCHANNEL, vmbus_onoffer}, | |
704 | {CHANNELMSG_RESCIND_CHANNELOFFER, vmbus_onoffer_rescind}, | |
705 | {CHANNELMSG_REQUESTOFFERS, NULL}, | |
706 | {CHANNELMSG_ALLOFFERS_DELIVERED, vmbus_onoffers_delivered}, | |
707 | {CHANNELMSG_OPENCHANNEL, NULL}, | |
708 | {CHANNELMSG_OPENCHANNEL_RESULT, vmbus_onopen_result}, | |
709 | {CHANNELMSG_CLOSECHANNEL, NULL}, | |
710 | {CHANNELMSG_GPADL_HEADER, NULL}, | |
711 | {CHANNELMSG_GPADL_BODY, NULL}, | |
712 | {CHANNELMSG_GPADL_CREATED, vmbus_ongpadl_created}, | |
713 | {CHANNELMSG_GPADL_TEARDOWN, NULL}, | |
714 | {CHANNELMSG_GPADL_TORNDOWN, vmbus_ongpadl_torndown}, | |
715 | {CHANNELMSG_RELID_RELEASED, NULL}, | |
716 | {CHANNELMSG_INITIATE_CONTACT, NULL}, | |
717 | {CHANNELMSG_VERSION_RESPONSE, vmbus_onversion_response}, | |
718 | {CHANNELMSG_UNLOAD, NULL}, | |
c8212f04 GKH |
719 | }; |
720 | ||
3e189519 | 721 | /* |
e98cb276 | 722 | * vmbus_onmessage - Handler for channel protocol messages. |
bd60c33e GKH |
723 | * |
724 | * This is invoked in the vmbus worker thread context. | |
725 | */ | |
e98cb276 | 726 | void vmbus_onmessage(void *context) |
3e7ee490 | 727 | { |
188963ec | 728 | struct hv_message *msg = context; |
82250213 | 729 | struct vmbus_channel_message_header *hdr; |
3e7ee490 HJ |
730 | int size; |
731 | ||
f6feebe0 HZ |
732 | hdr = (struct vmbus_channel_message_header *)msg->u.payload; |
733 | size = msg->header.payload_size; | |
3e7ee490 | 734 | |
c50f7fb2 | 735 | if (hdr->msgtype >= CHANNELMSG_COUNT) { |
0a46618d | 736 | pr_err("Received invalid channel message type %d size %d\n", |
c50f7fb2 | 737 | hdr->msgtype, size); |
04f50c4d | 738 | print_hex_dump_bytes("", DUMP_PREFIX_NONE, |
f6feebe0 | 739 | (unsigned char *)msg->u.payload, size); |
3e7ee490 HJ |
740 | return; |
741 | } | |
742 | ||
fa90f1de S |
743 | if (gChannelMessageTable[hdr->msgtype].message_handler) |
744 | gChannelMessageTable[hdr->msgtype].message_handler(hdr); | |
3e7ee490 | 745 | else |
0a46618d | 746 | pr_err("Unhandled channel message type %d\n", hdr->msgtype); |
3e7ee490 HJ |
747 | } |
748 | ||
3e189519 | 749 | /* |
e98cb276 | 750 | * vmbus_request_offers - Send a request to get all our pending offers. |
bd60c33e | 751 | */ |
e98cb276 | 752 | int vmbus_request_offers(void) |
3e7ee490 | 753 | { |
82250213 | 754 | struct vmbus_channel_message_header *msg; |
188963ec | 755 | struct vmbus_channel_msginfo *msginfo; |
bd60c33e | 756 | int ret; |
3e7ee490 | 757 | |
188963ec | 758 | msginfo = kmalloc(sizeof(*msginfo) + |
bd60c33e GKH |
759 | sizeof(struct vmbus_channel_message_header), |
760 | GFP_KERNEL); | |
188963ec | 761 | if (!msginfo) |
75910f23 | 762 | return -ENOMEM; |
3e7ee490 | 763 | |
0c3b7b2f | 764 | init_waitqueue_head(&msginfo->waitevent); |
75910f23 | 765 | |
c50f7fb2 | 766 | msg = (struct vmbus_channel_message_header *)msginfo->msg; |
3e7ee490 | 767 | |
c50f7fb2 | 768 | msg->msgtype = CHANNELMSG_REQUESTOFFERS; |
3e7ee490 | 769 | |
3e7ee490 | 770 | |
c6977677 | 771 | ret = vmbus_post_msg(msg, |
bd60c33e GKH |
772 | sizeof(struct vmbus_channel_message_header)); |
773 | if (ret != 0) { | |
0a46618d | 774 | pr_err("Unable to request offers - %d\n", ret); |
3e7ee490 | 775 | |
0c3b7b2f S |
776 | goto cleanup; |
777 | } | |
3e7ee490 | 778 | |
0c3b7b2f S |
779 | msginfo->wait_condition = 0; |
780 | wait_event_timeout(msginfo->waitevent, msginfo->wait_condition, | |
781 | msecs_to_jiffies(1000)); | |
782 | if (msginfo->wait_condition == 0) { | |
783 | ret = -ETIMEDOUT; | |
784 | goto cleanup; | |
3e7ee490 | 785 | } |
3e7ee490 | 786 | |
3e7ee490 HJ |
787 | |
788 | ||
0c3b7b2f | 789 | cleanup: |
dd9b15dc | 790 | kfree(msginfo); |
3e7ee490 | 791 | |
3e7ee490 HJ |
792 | return ret; |
793 | } | |
794 | ||
454f18a9 | 795 | /* eof */ |