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  • Committer: Bazaar Package Importer
  • Author(s): Ben Hutchings, Ben Hutchings, Aurelien Jarno
  • Date: 2011-06-07 12:14:05 UTC
  • mfrom: (43.1.9 sid)
  • Revision ID: james.westby@ubuntu.com-20110607121405-i3h1rd7nrnd2b73h
Tags: 2.6.39-2
http://bugs.debian.org/627492
http://bugs.debian.org/596626
http://bugs.debian.org/628932
http://bugs.debian.org/628191
http://bugs.debian.org/627837
http://bugs.debian.org/622997
http://bugs.debian.org/622745
http://bugs.debian.org/619827
http://bugs.debian.org/629401
[ Ben Hutchings ]
* [x86] Enable BACKLIGHT_APPLE, replacing BACKLIGHT_MBP_NVIDIA
  (Closes: #627492)
* cgroups: Disable memory resource controller by default. Allow it
  to be enabled using kernel parameter 'cgroup_enable=memory'.
* rt2800usb: Enable support for more USB devices including
  Linksys WUSB600N (Closes: #596626) (this change was accidentally
  omitted from 2.6.39-1)
* [x86] Remove Celeron from list of processors supporting PAE. Most
  'Celeron M' models do not.
* Update debconf template translations:
  - Swedish (Martin Bagge) (Closes: #628932)
  - French (David Prévot) (Closes: #628191)
* aufs: Update for 2.6.39 (Closes: #627837)
* Add stable 2.6.39.1, including:
  - ext4: dont set PageUptodate in ext4_end_bio()
  - pata_cmd64x: fix boot crash on parisc (Closes: #622997, #622745)
  - ext3: Fix fs corruption when make_indexed_dir() fails
  - netfilter: nf_ct_sip: validate Content-Length in TCP SIP messages
  - sctp: fix race between sctp_bind_addr_free() and
    sctp_bind_addr_conflict()
  - sctp: fix memory leak of the ASCONF queue when free asoc
  - md/bitmap: fix saving of events_cleared and other state
  - cdc_acm: Fix oops when Droids MuIn LCD is connected
  - cx88: Fix conversion from BKL to fine-grained locks (Closes: #619827)
  - keys: Set cred->user_ns in key_replace_session_keyring (CVE-2011-2184)
  - tmpfs: fix race between truncate and writepage
  - nfs41: Correct offset for LAYOUTCOMMIT
  - xen/mmu: fix a race window causing leave_mm BUG()
  - ext4: fix possible use-after-free in ext4_remove_li_request()
  For the complete list of changes, see:
   http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39.1
* Bump ABI to 2
* netfilter: Enable IP_SET, IP_SET_BITMAP_IP, IP_SET_BITMAP_IPMAC,
  IP_SET_BITMAP_PORT, IP_SET_HASH_IP, IP_SET_HASH_IPPORT,
  IP_SET_HASH_IPPORTIP, IP_SET_HASH_IPPORTNET, IP_SET_HASH_NET,
  IP_SET_HASH_NETPORT, IP_SET_LIST_SET, NETFILTER_XT_SET as modules
  (Closes: #629401)

[ Aurelien Jarno ]
* [mipsel/loongson-2f] Disable_SCSI_LPFC to workaround GCC ICE.

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drivers/staging/hv/hv_util.c
 
1
/*
 
2
 * Copyright (c) 2010, 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>
 
20
 */
 
21
#include <linux/kernel.h>
 
22
#include <linux/init.h>
 
23
#include <linux/module.h>
 
24
#include <linux/slab.h>
 
25
#include <linux/sysctl.h>
 
26
#include <linux/reboot.h>
 
27
#include <linux/dmi.h>
 
28
#include <linux/pci.h>
 
29
 
 
30
#include "logging.h"
 
31
#include "hv_api.h"
 
32
#include "vmbus.h"
 
33
#include "vmbus_packet_format.h"
 
34
#include "vmbus_channel_interface.h"
 
35
#include "version_info.h"
 
36
#include "channel.h"
 
37
#include "vmbus_private.h"
 
38
#include "vmbus_api.h"
 
39
#include "utils.h"
 
40
#include "hv_kvp.h"
 
41
 
 
42
static u8 *shut_txf_buf;
 
43
static u8 *time_txf_buf;
 
44
static u8 *hbeat_txf_buf;
 
45
 
 
46
static void shutdown_onchannelcallback(void *context)
 
47
{
 
48
        struct vmbus_channel *channel = context;
 
49
        u32 recvlen;
 
50
        u64 requestid;
 
51
        u8  execute_shutdown = false;
 
52
 
 
53
        struct shutdown_msg_data *shutdown_msg;
 
54
 
 
55
        struct icmsg_hdr *icmsghdrp;
 
56
        struct icmsg_negotiate *negop = NULL;
 
57
 
 
58
        vmbus_recvpacket(channel, shut_txf_buf,
 
59
                         PAGE_SIZE, &recvlen, &requestid);
 
60
 
 
61
        if (recvlen > 0) {
 
62
                DPRINT_DBG(VMBUS, "shutdown packet: len=%d, requestid=%lld",
 
63
                           recvlen, requestid);
 
64
 
 
65
                icmsghdrp = (struct icmsg_hdr *)&shut_txf_buf[
 
66
                        sizeof(struct vmbuspipe_hdr)];
 
67
 
 
68
                if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) {
 
69
                        prep_negotiate_resp(icmsghdrp, negop, shut_txf_buf);
 
70
                } else {
 
71
                        shutdown_msg =
 
72
                                (struct shutdown_msg_data *)&shut_txf_buf[
 
73
                                        sizeof(struct vmbuspipe_hdr) +
 
74
                                        sizeof(struct icmsg_hdr)];
 
75
 
 
76
                        switch (shutdown_msg->flags) {
 
77
                        case 0:
 
78
                        case 1:
 
79
                                icmsghdrp->status = HV_S_OK;
 
80
                                execute_shutdown = true;
 
81
 
 
82
                                DPRINT_INFO(VMBUS, "Shutdown request received -"
 
83
                                            " graceful shutdown initiated");
 
84
                                break;
 
85
                        default:
 
86
                                icmsghdrp->status = HV_E_FAIL;
 
87
                                execute_shutdown = false;
 
88
 
 
89
                                DPRINT_INFO(VMBUS, "Shutdown request received -"
 
90
                                            " Invalid request");
 
91
                                break;
 
92
                        };
 
93
                }
 
94
 
 
95
                icmsghdrp->icflags = ICMSGHDRFLAG_TRANSACTION
 
96
                        | ICMSGHDRFLAG_RESPONSE;
 
97
 
 
98
                vmbus_sendpacket(channel, shut_txf_buf,
 
99
                                       recvlen, requestid,
 
100
                                       VM_PKT_DATA_INBAND, 0);
 
101
        }
 
102
 
 
103
        if (execute_shutdown == true)
 
104
                orderly_poweroff(false);
 
105
}
 
106
 
 
107
/*
 
108
 * Set guest time to host UTC time.
 
109
 */
 
110
static inline void do_adj_guesttime(u64 hosttime)
 
111
{
 
112
        s64 host_tns;
 
113
        struct timespec host_ts;
 
114
 
 
115
        host_tns = (hosttime - WLTIMEDELTA) * 100;
 
116
        host_ts = ns_to_timespec(host_tns);
 
117
 
 
118
        do_settimeofday(&host_ts);
 
119
}
 
120
 
 
121
/*
 
122
 * Synchronize time with host after reboot, restore, etc.
 
123
 *
 
124
 * ICTIMESYNCFLAG_SYNC flag bit indicates reboot, restore events of the VM.
 
125
 * After reboot the flag ICTIMESYNCFLAG_SYNC is included in the first time
 
126
 * message after the timesync channel is opened. Since the hv_utils module is
 
127
 * loaded after hv_vmbus, the first message is usually missed. The other
 
128
 * thing is, systime is automatically set to emulated hardware clock which may
 
129
 * not be UTC time or in the same time zone. So, to override these effects, we
 
130
 * use the first 50 time samples for initial system time setting.
 
131
 */
 
132
static inline void adj_guesttime(u64 hosttime, u8 flags)
 
133
{
 
134
        static s32 scnt = 50;
 
135
 
 
136
        if ((flags & ICTIMESYNCFLAG_SYNC) != 0) {
 
137
                do_adj_guesttime(hosttime);
 
138
                return;
 
139
        }
 
140
 
 
141
        if ((flags & ICTIMESYNCFLAG_SAMPLE) != 0 && scnt > 0) {
 
142
                scnt--;
 
143
                do_adj_guesttime(hosttime);
 
144
        }
 
145
}
 
146
 
 
147
/*
 
148
 * Time Sync Channel message handler.
 
149
 */
 
150
static void timesync_onchannelcallback(void *context)
 
151
{
 
152
        struct vmbus_channel *channel = context;
 
153
        u32 recvlen;
 
154
        u64 requestid;
 
155
        struct icmsg_hdr *icmsghdrp;
 
156
        struct ictimesync_data *timedatap;
 
157
 
 
158
        vmbus_recvpacket(channel, time_txf_buf,
 
159
                         PAGE_SIZE, &recvlen, &requestid);
 
160
 
 
161
        if (recvlen > 0) {
 
162
                DPRINT_DBG(VMBUS, "timesync packet: recvlen=%d, requestid=%lld",
 
163
                        recvlen, requestid);
 
164
 
 
165
                icmsghdrp = (struct icmsg_hdr *)&time_txf_buf[
 
166
                                sizeof(struct vmbuspipe_hdr)];
 
167
 
 
168
                if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) {
 
169
                        prep_negotiate_resp(icmsghdrp, NULL, time_txf_buf);
 
170
                } else {
 
171
                        timedatap = (struct ictimesync_data *)&time_txf_buf[
 
172
                                sizeof(struct vmbuspipe_hdr) +
 
173
                                sizeof(struct icmsg_hdr)];
 
174
                        adj_guesttime(timedatap->parenttime, timedatap->flags);
 
175
                }
 
176
 
 
177
                icmsghdrp->icflags = ICMSGHDRFLAG_TRANSACTION
 
178
                        | ICMSGHDRFLAG_RESPONSE;
 
179
 
 
180
                vmbus_sendpacket(channel, time_txf_buf,
 
181
                                recvlen, requestid,
 
182
                                VM_PKT_DATA_INBAND, 0);
 
183
        }
 
184
}
 
185
 
 
186
/*
 
187
 * Heartbeat functionality.
 
188
 * Every two seconds, Hyper-V send us a heartbeat request message.
 
189
 * we respond to this message, and Hyper-V knows we are alive.
 
190
 */
 
191
static void heartbeat_onchannelcallback(void *context)
 
192
{
 
193
        struct vmbus_channel *channel = context;
 
194
        u32 recvlen;
 
195
        u64 requestid;
 
196
        struct icmsg_hdr *icmsghdrp;
 
197
        struct heartbeat_msg_data *heartbeat_msg;
 
198
 
 
199
        vmbus_recvpacket(channel, hbeat_txf_buf,
 
200
                         PAGE_SIZE, &recvlen, &requestid);
 
201
 
 
202
        if (recvlen > 0) {
 
203
                DPRINT_DBG(VMBUS, "heartbeat packet: len=%d, requestid=%lld",
 
204
                           recvlen, requestid);
 
205
 
 
206
                icmsghdrp = (struct icmsg_hdr *)&hbeat_txf_buf[
 
207
                                sizeof(struct vmbuspipe_hdr)];
 
208
 
 
209
                if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) {
 
210
                        prep_negotiate_resp(icmsghdrp, NULL, hbeat_txf_buf);
 
211
                } else {
 
212
                        heartbeat_msg =
 
213
                                (struct heartbeat_msg_data *)&hbeat_txf_buf[
 
214
                                        sizeof(struct vmbuspipe_hdr) +
 
215
                                        sizeof(struct icmsg_hdr)];
 
216
 
 
217
                        DPRINT_DBG(VMBUS, "heartbeat seq = %lld",
 
218
                                   heartbeat_msg->seq_num);
 
219
 
 
220
                        heartbeat_msg->seq_num += 1;
 
221
                }
 
222
 
 
223
                icmsghdrp->icflags = ICMSGHDRFLAG_TRANSACTION
 
224
                        | ICMSGHDRFLAG_RESPONSE;
 
225
 
 
226
                vmbus_sendpacket(channel, hbeat_txf_buf,
 
227
                                       recvlen, requestid,
 
228
                                       VM_PKT_DATA_INBAND, 0);
 
229
        }
 
230
}
 
231
 
 
232
static const struct pci_device_id __initconst
 
233
hv_utils_pci_table[] __maybe_unused = {
 
234
        { PCI_DEVICE(0x1414, 0x5353) }, /* Hyper-V emulated VGA controller */
 
235
        { 0 }
 
236
};
 
237
MODULE_DEVICE_TABLE(pci, hv_utils_pci_table);
 
238
 
 
239
 
 
240
static const struct dmi_system_id __initconst
 
241
hv_utils_dmi_table[] __maybe_unused  = {
 
242
        {
 
243
                .ident = "Hyper-V",
 
244
                .matches = {
 
245
                        DMI_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
 
246
                        DMI_MATCH(DMI_PRODUCT_NAME, "Virtual Machine"),
 
247
                        DMI_MATCH(DMI_BOARD_NAME, "Virtual Machine"),
 
248
                },
 
249
        },
 
250
        { },
 
251
};
 
252
MODULE_DEVICE_TABLE(dmi, hv_utils_dmi_table);
 
253
 
 
254
 
 
255
static int __init init_hyperv_utils(void)
 
256
{
 
257
        printk(KERN_INFO "Registering HyperV Utility Driver\n");
 
258
 
 
259
        if (hv_kvp_init())
 
260
                return -ENODEV;
 
261
 
 
262
 
 
263
        if (!dmi_check_system(hv_utils_dmi_table))
 
264
                return -ENODEV;
 
265
 
 
266
        shut_txf_buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
 
267
        time_txf_buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
 
268
        hbeat_txf_buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
 
269
 
 
270
        if (!shut_txf_buf || !time_txf_buf || !hbeat_txf_buf) {
 
271
                printk(KERN_INFO
 
272
                       "Unable to allocate memory for receive buffer\n");
 
273
                kfree(shut_txf_buf);
 
274
                kfree(time_txf_buf);
 
275
                kfree(hbeat_txf_buf);
 
276
                return -ENOMEM;
 
277
        }
 
278
 
 
279
        hv_cb_utils[HV_SHUTDOWN_MSG].channel->onchannel_callback =
 
280
                &shutdown_onchannelcallback;
 
281
        hv_cb_utils[HV_SHUTDOWN_MSG].callback = &shutdown_onchannelcallback;
 
282
 
 
283
        hv_cb_utils[HV_TIMESYNC_MSG].channel->onchannel_callback =
 
284
                &timesync_onchannelcallback;
 
285
        hv_cb_utils[HV_TIMESYNC_MSG].callback = &timesync_onchannelcallback;
 
286
 
 
287
        hv_cb_utils[HV_HEARTBEAT_MSG].channel->onchannel_callback =
 
288
                &heartbeat_onchannelcallback;
 
289
        hv_cb_utils[HV_HEARTBEAT_MSG].callback = &heartbeat_onchannelcallback;
 
290
 
 
291
        hv_cb_utils[HV_KVP_MSG].channel->onchannel_callback =
 
292
                &hv_kvp_onchannelcallback;
 
293
 
 
294
 
 
295
 
 
296
        return 0;
 
297
}
 
298
 
 
299
static void exit_hyperv_utils(void)
 
300
{
 
301
        printk(KERN_INFO "De-Registered HyperV Utility Driver\n");
 
302
 
 
303
        hv_cb_utils[HV_SHUTDOWN_MSG].channel->onchannel_callback =
 
304
                &chn_cb_negotiate;
 
305
        hv_cb_utils[HV_SHUTDOWN_MSG].callback = &chn_cb_negotiate;
 
306
 
 
307
        hv_cb_utils[HV_TIMESYNC_MSG].channel->onchannel_callback =
 
308
                &chn_cb_negotiate;
 
309
        hv_cb_utils[HV_TIMESYNC_MSG].callback = &chn_cb_negotiate;
 
310
 
 
311
        hv_cb_utils[HV_HEARTBEAT_MSG].channel->onchannel_callback =
 
312
                &chn_cb_negotiate;
 
313
        hv_cb_utils[HV_HEARTBEAT_MSG].callback = &chn_cb_negotiate;
 
314
 
 
315
        hv_cb_utils[HV_KVP_MSG].channel->onchannel_callback =
 
316
                &chn_cb_negotiate;
 
317
        hv_kvp_deinit();
 
318
 
 
319
        kfree(shut_txf_buf);
 
320
        kfree(time_txf_buf);
 
321
        kfree(hbeat_txf_buf);
 
322
}
 
323
 
 
324
module_init(init_hyperv_utils);
 
325
module_exit(exit_hyperv_utils);
 
326
 
 
327
MODULE_DESCRIPTION("Hyper-V Utilities");
 
328
MODULE_VERSION(HV_DRV_VERSION);
 
329
MODULE_LICENSE("GPL");