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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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Lines of Context:
drivers/char/pcmcia/ipwireless/network.c
1
 
/*
2
 
 * IPWireless 3G PCMCIA Network Driver
3
 
 *
4
 
 * Original code
5
 
 *   by Stephen Blackheath <stephen@blacksapphire.com>,
6
 
 *      Ben Martel <benm@symmetric.co.nz>
7
 
 *
8
 
 * Copyrighted as follows:
9
 
 *   Copyright (C) 2004 by Symmetric Systems Ltd (NZ)
10
 
 *
11
 
 * Various driver changes and rewrites, port to new kernels
12
 
 *   Copyright (C) 2006-2007 Jiri Kosina
13
 
 *
14
 
 * Misc code cleanups and updates
15
 
 *   Copyright (C) 2007 David Sterba
16
 
 */
17
 
 
18
 
#include <linux/interrupt.h>
19
 
#include <linux/kernel.h>
20
 
#include <linux/mutex.h>
21
 
#include <linux/netdevice.h>
22
 
#include <linux/ppp_channel.h>
23
 
#include <linux/ppp_defs.h>
24
 
#include <linux/slab.h>
25
 
#include <linux/if_ppp.h>
26
 
#include <linux/skbuff.h>
27
 
 
28
 
#include "network.h"
29
 
#include "hardware.h"
30
 
#include "main.h"
31
 
#include "tty.h"
32
 
 
33
 
#define MAX_ASSOCIATED_TTYS 2
34
 
 
35
 
#define SC_RCV_BITS     (SC_RCV_B7_1|SC_RCV_B7_0|SC_RCV_ODDP|SC_RCV_EVNP)
36
 
 
37
 
struct ipw_network {
38
 
        /* Hardware context, used for calls to hardware layer. */
39
 
        struct ipw_hardware *hardware;
40
 
        /* Context for kernel 'generic_ppp' functionality */
41
 
        struct ppp_channel *ppp_channel;
42
 
        /* tty context connected with IPW console */
43
 
        struct ipw_tty *associated_ttys[NO_OF_IPW_CHANNELS][MAX_ASSOCIATED_TTYS];
44
 
        /* True if ppp needs waking up once we're ready to xmit */
45
 
        int ppp_blocked;
46
 
        /* Number of packets queued up in hardware module. */
47
 
        int outgoing_packets_queued;
48
 
        /* Spinlock to avoid interrupts during shutdown */
49
 
        spinlock_t lock;
50
 
        struct mutex close_lock;
51
 
 
52
 
        /* PPP ioctl data, not actually used anywere */
53
 
        unsigned int flags;
54
 
        unsigned int rbits;
55
 
        u32 xaccm[8];
56
 
        u32 raccm;
57
 
        int mru;
58
 
 
59
 
        int shutting_down;
60
 
        unsigned int ras_control_lines;
61
 
 
62
 
        struct work_struct work_go_online;
63
 
        struct work_struct work_go_offline;
64
 
};
65
 
 
66
 
static void notify_packet_sent(void *callback_data, unsigned int packet_length)
67
 
{
68
 
        struct ipw_network *network = callback_data;
69
 
        unsigned long flags;
70
 
 
71
 
        spin_lock_irqsave(&network->lock, flags);
72
 
        network->outgoing_packets_queued--;
73
 
        if (network->ppp_channel != NULL) {
74
 
                if (network->ppp_blocked) {
75
 
                        network->ppp_blocked = 0;
76
 
                        spin_unlock_irqrestore(&network->lock, flags);
77
 
                        ppp_output_wakeup(network->ppp_channel);
78
 
                        if (ipwireless_debug)
79
 
                                printk(KERN_DEBUG IPWIRELESS_PCCARD_NAME
80
 
                                       ": ppp unblocked\n");
81
 
                } else
82
 
                        spin_unlock_irqrestore(&network->lock, flags);
83
 
        } else
84
 
                spin_unlock_irqrestore(&network->lock, flags);
85
 
}
86
 
 
87
 
/*
88
 
 * Called by the ppp system when it has a packet to send to the hardware.
89
 
 */
90
 
static int ipwireless_ppp_start_xmit(struct ppp_channel *ppp_channel,
91
 
                                     struct sk_buff *skb)
92
 
{
93
 
        struct ipw_network *network = ppp_channel->private;
94
 
        unsigned long flags;
95
 
 
96
 
        spin_lock_irqsave(&network->lock, flags);
97
 
        if (network->outgoing_packets_queued < ipwireless_out_queue) {
98
 
                unsigned char *buf;
99
 
                static unsigned char header[] = {
100
 
                        PPP_ALLSTATIONS, /* 0xff */
101
 
                        PPP_UI,          /* 0x03 */
102
 
                };
103
 
                int ret;
104
 
 
105
 
                network->outgoing_packets_queued++;
106
 
                spin_unlock_irqrestore(&network->lock, flags);
107
 
 
108
 
                /*
109
 
                 * If we have the requested amount of headroom in the skb we
110
 
                 * were handed, then we can add the header efficiently.
111
 
                 */
112
 
                if (skb_headroom(skb) >= 2) {
113
 
                        memcpy(skb_push(skb, 2), header, 2);
114
 
                        ret = ipwireless_send_packet(network->hardware,
115
 
                                               IPW_CHANNEL_RAS, skb->data,
116
 
                                               skb->len,
117
 
                                               notify_packet_sent,
118
 
                                               network);
119
 
                        if (ret == -1) {
120
 
                                skb_pull(skb, 2);
121
 
                                return 0;
122
 
                        }
123
 
                } else {
124
 
                        /* Otherwise (rarely) we do it inefficiently. */
125
 
                        buf = kmalloc(skb->len + 2, GFP_ATOMIC);
126
 
                        if (!buf)
127
 
                                return 0;
128
 
                        memcpy(buf + 2, skb->data, skb->len);
129
 
                        memcpy(buf, header, 2);
130
 
                        ret = ipwireless_send_packet(network->hardware,
131
 
                                               IPW_CHANNEL_RAS, buf,
132
 
                                               skb->len + 2,
133
 
                                               notify_packet_sent,
134
 
                                               network);
135
 
                        kfree(buf);
136
 
                        if (ret == -1)
137
 
                                return 0;
138
 
                }
139
 
                kfree_skb(skb);
140
 
                return 1;
141
 
        } else {
142
 
                /*
143
 
                 * Otherwise reject the packet, and flag that the ppp system
144
 
                 * needs to be unblocked once we are ready to send.
145
 
                 */
146
 
                network->ppp_blocked = 1;
147
 
                spin_unlock_irqrestore(&network->lock, flags);
148
 
                if (ipwireless_debug)
149
 
                        printk(KERN_DEBUG IPWIRELESS_PCCARD_NAME ": ppp blocked\n");
150
 
                return 0;
151
 
        }
152
 
}
153
 
 
154
 
/* Handle an ioctl call that has come in via ppp. (copy of ppp_async_ioctl() */
155
 
static int ipwireless_ppp_ioctl(struct ppp_channel *ppp_channel,
156
 
                                unsigned int cmd, unsigned long arg)
157
 
{
158
 
        struct ipw_network *network = ppp_channel->private;
159
 
        int err, val;
160
 
        u32 accm[8];
161
 
        int __user *user_arg = (int __user *) arg;
162
 
 
163
 
        err = -EFAULT;
164
 
        switch (cmd) {
165
 
        case PPPIOCGFLAGS:
166
 
                val = network->flags | network->rbits;
167
 
                if (put_user(val, user_arg))
168
 
                        break;
169
 
                err = 0;
170
 
                break;
171
 
 
172
 
        case PPPIOCSFLAGS:
173
 
                if (get_user(val, user_arg))
174
 
                        break;
175
 
                network->flags = val & ~SC_RCV_BITS;
176
 
                network->rbits = val & SC_RCV_BITS;
177
 
                err = 0;
178
 
                break;
179
 
 
180
 
        case PPPIOCGASYNCMAP:
181
 
                if (put_user(network->xaccm[0], user_arg))
182
 
                        break;
183
 
                err = 0;
184
 
                break;
185
 
 
186
 
        case PPPIOCSASYNCMAP:
187
 
                if (get_user(network->xaccm[0], user_arg))
188
 
                        break;
189
 
                err = 0;
190
 
                break;
191
 
 
192
 
        case PPPIOCGRASYNCMAP:
193
 
                if (put_user(network->raccm, user_arg))
194
 
                        break;
195
 
                err = 0;
196
 
                break;
197
 
 
198
 
        case PPPIOCSRASYNCMAP:
199
 
                if (get_user(network->raccm, user_arg))
200
 
                        break;
201
 
                err = 0;
202
 
                break;
203
 
 
204
 
        case PPPIOCGXASYNCMAP:
205
 
                if (copy_to_user((void __user *) arg, network->xaccm,
206
 
                                        sizeof(network->xaccm)))
207
 
                        break;
208
 
                err = 0;
209
 
                break;
210
 
 
211
 
        case PPPIOCSXASYNCMAP:
212
 
                if (copy_from_user(accm, (void __user *) arg, sizeof(accm)))
213
 
                        break;
214
 
                accm[2] &= ~0x40000000U;        /* can't escape 0x5e */
215
 
                accm[3] |= 0x60000000U; /* must escape 0x7d, 0x7e */
216
 
                memcpy(network->xaccm, accm, sizeof(network->xaccm));
217
 
                err = 0;
218
 
                break;
219
 
 
220
 
        case PPPIOCGMRU:
221
 
                if (put_user(network->mru, user_arg))
222
 
                        break;
223
 
                err = 0;
224
 
                break;
225
 
 
226
 
        case PPPIOCSMRU:
227
 
                if (get_user(val, user_arg))
228
 
                        break;
229
 
                if (val < PPP_MRU)
230
 
                        val = PPP_MRU;
231
 
                network->mru = val;
232
 
                err = 0;
233
 
                break;
234
 
 
235
 
        default:
236
 
                err = -ENOTTY;
237
 
        }
238
 
 
239
 
        return err;
240
 
}
241
 
 
242
 
static const struct ppp_channel_ops ipwireless_ppp_channel_ops = {
243
 
        .start_xmit = ipwireless_ppp_start_xmit,
244
 
        .ioctl      = ipwireless_ppp_ioctl
245
 
};
246
 
 
247
 
static void do_go_online(struct work_struct *work_go_online)
248
 
{
249
 
        struct ipw_network *network =
250
 
                container_of(work_go_online, struct ipw_network,
251
 
                                work_go_online);
252
 
        unsigned long flags;
253
 
 
254
 
        spin_lock_irqsave(&network->lock, flags);
255
 
        if (!network->ppp_channel) {
256
 
                struct ppp_channel *channel;
257
 
 
258
 
                spin_unlock_irqrestore(&network->lock, flags);
259
 
                channel = kzalloc(sizeof(struct ppp_channel), GFP_KERNEL);
260
 
                if (!channel) {
261
 
                        printk(KERN_ERR IPWIRELESS_PCCARD_NAME
262
 
                                        ": unable to allocate PPP channel\n");
263
 
                        return;
264
 
                }
265
 
                channel->private = network;
266
 
                channel->mtu = 16384;   /* Wild guess */
267
 
                channel->hdrlen = 2;
268
 
                channel->ops = &ipwireless_ppp_channel_ops;
269
 
 
270
 
                network->flags = 0;
271
 
                network->rbits = 0;
272
 
                network->mru = PPP_MRU;
273
 
                memset(network->xaccm, 0, sizeof(network->xaccm));
274
 
                network->xaccm[0] = ~0U;
275
 
                network->xaccm[3] = 0x60000000U;
276
 
                network->raccm = ~0U;
277
 
                ppp_register_channel(channel);
278
 
                spin_lock_irqsave(&network->lock, flags);
279
 
                network->ppp_channel = channel;
280
 
        }
281
 
        spin_unlock_irqrestore(&network->lock, flags);
282
 
}
283
 
 
284
 
static void do_go_offline(struct work_struct *work_go_offline)
285
 
{
286
 
        struct ipw_network *network =
287
 
                container_of(work_go_offline, struct ipw_network,
288
 
                                work_go_offline);
289
 
        unsigned long flags;
290
 
 
291
 
        mutex_lock(&network->close_lock);
292
 
        spin_lock_irqsave(&network->lock, flags);
293
 
        if (network->ppp_channel != NULL) {
294
 
                struct ppp_channel *channel = network->ppp_channel;
295
 
 
296
 
                network->ppp_channel = NULL;
297
 
                spin_unlock_irqrestore(&network->lock, flags);
298
 
                mutex_unlock(&network->close_lock);
299
 
                ppp_unregister_channel(channel);
300
 
        } else {
301
 
                spin_unlock_irqrestore(&network->lock, flags);
302
 
                mutex_unlock(&network->close_lock);
303
 
        }
304
 
}
305
 
 
306
 
void ipwireless_network_notify_control_line_change(struct ipw_network *network,
307
 
                                                   unsigned int channel_idx,
308
 
                                                   unsigned int control_lines,
309
 
                                                   unsigned int changed_mask)
310
 
{
311
 
        int i;
312
 
 
313
 
        if (channel_idx == IPW_CHANNEL_RAS)
314
 
                network->ras_control_lines = control_lines;
315
 
 
316
 
        for (i = 0; i < MAX_ASSOCIATED_TTYS; i++) {
317
 
                struct ipw_tty *tty =
318
 
                        network->associated_ttys[channel_idx][i];
319
 
 
320
 
                /*
321
 
                 * If it's associated with a tty (other than the RAS channel
322
 
                 * when we're online), then send the data to that tty.  The RAS
323
 
                 * channel's data is handled above - it always goes through
324
 
                 * ppp_generic.
325
 
                 */
326
 
                if (tty)
327
 
                        ipwireless_tty_notify_control_line_change(tty,
328
 
                                                                  channel_idx,
329
 
                                                                  control_lines,
330
 
                                                                  changed_mask);
331
 
        }
332
 
}
333
 
 
334
 
/*
335
 
 * Some versions of firmware stuff packets with 0xff 0x03 (PPP: ALLSTATIONS, UI)
336
 
 * bytes, which are required on sent packet, but not always present on received
337
 
 * packets
338
 
 */
339
 
static struct sk_buff *ipw_packet_received_skb(unsigned char *data,
340
 
                                               unsigned int length)
341
 
{
342
 
        struct sk_buff *skb;
343
 
 
344
 
        if (length > 2 && data[0] == PPP_ALLSTATIONS && data[1] == PPP_UI) {
345
 
                length -= 2;
346
 
                data += 2;
347
 
        }
348
 
 
349
 
        skb = dev_alloc_skb(length + 4);
350
 
        skb_reserve(skb, 2);
351
 
        memcpy(skb_put(skb, length), data, length);
352
 
 
353
 
        return skb;
354
 
}
355
 
 
356
 
void ipwireless_network_packet_received(struct ipw_network *network,
357
 
                                        unsigned int channel_idx,
358
 
                                        unsigned char *data,
359
 
                                        unsigned int length)
360
 
{
361
 
        int i;
362
 
        unsigned long flags;
363
 
 
364
 
        for (i = 0; i < MAX_ASSOCIATED_TTYS; i++) {
365
 
                struct ipw_tty *tty = network->associated_ttys[channel_idx][i];
366
 
 
367
 
                if (!tty)
368
 
                        continue;
369
 
 
370
 
                /*
371
 
                 * If it's associated with a tty (other than the RAS channel
372
 
                 * when we're online), then send the data to that tty.  The RAS
373
 
                 * channel's data is handled above - it always goes through
374
 
                 * ppp_generic.
375
 
                 */
376
 
                if (channel_idx == IPW_CHANNEL_RAS
377
 
                                && (network->ras_control_lines &
378
 
                                        IPW_CONTROL_LINE_DCD) != 0
379
 
                                && ipwireless_tty_is_modem(tty)) {
380
 
                        /*
381
 
                         * If data came in on the RAS channel and this tty is
382
 
                         * the modem tty, and we are online, then we send it to
383
 
                         * the PPP layer.
384
 
                         */
385
 
                        mutex_lock(&network->close_lock);
386
 
                        spin_lock_irqsave(&network->lock, flags);
387
 
                        if (network->ppp_channel != NULL) {
388
 
                                struct sk_buff *skb;
389
 
 
390
 
                                spin_unlock_irqrestore(&network->lock,
391
 
                                                flags);
392
 
 
393
 
                                /* Send the data to the ppp_generic module. */
394
 
                                skb = ipw_packet_received_skb(data, length);
395
 
                                ppp_input(network->ppp_channel, skb);
396
 
                        } else
397
 
                                spin_unlock_irqrestore(&network->lock,
398
 
                                                flags);
399
 
                        mutex_unlock(&network->close_lock);
400
 
                }
401
 
                /* Otherwise we send it out the tty. */
402
 
                else
403
 
                        ipwireless_tty_received(tty, data, length);
404
 
        }
405
 
}
406
 
 
407
 
struct ipw_network *ipwireless_network_create(struct ipw_hardware *hw)
408
 
{
409
 
        struct ipw_network *network =
410
 
                kzalloc(sizeof(struct ipw_network), GFP_ATOMIC);
411
 
 
412
 
        if (!network)
413
 
                return NULL;
414
 
 
415
 
        spin_lock_init(&network->lock);
416
 
        mutex_init(&network->close_lock);
417
 
 
418
 
        network->hardware = hw;
419
 
 
420
 
        INIT_WORK(&network->work_go_online, do_go_online);
421
 
        INIT_WORK(&network->work_go_offline, do_go_offline);
422
 
 
423
 
        ipwireless_associate_network(hw, network);
424
 
 
425
 
        return network;
426
 
}
427
 
 
428
 
void ipwireless_network_free(struct ipw_network *network)
429
 
{
430
 
        network->shutting_down = 1;
431
 
 
432
 
        ipwireless_ppp_close(network);
433
 
        flush_work_sync(&network->work_go_online);
434
 
        flush_work_sync(&network->work_go_offline);
435
 
 
436
 
        ipwireless_stop_interrupts(network->hardware);
437
 
        ipwireless_associate_network(network->hardware, NULL);
438
 
 
439
 
        kfree(network);
440
 
}
441
 
 
442
 
void ipwireless_associate_network_tty(struct ipw_network *network,
443
 
                                      unsigned int channel_idx,
444
 
                                      struct ipw_tty *tty)
445
 
{
446
 
        int i;
447
 
 
448
 
        for (i = 0; i < MAX_ASSOCIATED_TTYS; i++)
449
 
                if (network->associated_ttys[channel_idx][i] == NULL) {
450
 
                        network->associated_ttys[channel_idx][i] = tty;
451
 
                        break;
452
 
                }
453
 
}
454
 
 
455
 
void ipwireless_disassociate_network_ttys(struct ipw_network *network,
456
 
                                          unsigned int channel_idx)
457
 
{
458
 
        int i;
459
 
 
460
 
        for (i = 0; i < MAX_ASSOCIATED_TTYS; i++)
461
 
                network->associated_ttys[channel_idx][i] = NULL;
462
 
}
463
 
 
464
 
void ipwireless_ppp_open(struct ipw_network *network)
465
 
{
466
 
        if (ipwireless_debug)
467
 
                printk(KERN_DEBUG IPWIRELESS_PCCARD_NAME ": online\n");
468
 
        schedule_work(&network->work_go_online);
469
 
}
470
 
 
471
 
void ipwireless_ppp_close(struct ipw_network *network)
472
 
{
473
 
        /* Disconnect from the wireless network. */
474
 
        if (ipwireless_debug)
475
 
                printk(KERN_DEBUG IPWIRELESS_PCCARD_NAME ": offline\n");
476
 
        schedule_work(&network->work_go_offline);
477
 
}
478
 
 
479
 
int ipwireless_ppp_channel_index(struct ipw_network *network)
480
 
{
481
 
        int ret = -1;
482
 
        unsigned long flags;
483
 
 
484
 
        spin_lock_irqsave(&network->lock, flags);
485
 
        if (network->ppp_channel != NULL)
486
 
                ret = ppp_channel_index(network->ppp_channel);
487
 
        spin_unlock_irqrestore(&network->lock, flags);
488
 
 
489
 
        return ret;
490
 
}
491
 
 
492
 
int ipwireless_ppp_unit_number(struct ipw_network *network)
493
 
{
494
 
        int ret = -1;
495
 
        unsigned long flags;
496
 
 
497
 
        spin_lock_irqsave(&network->lock, flags);
498
 
        if (network->ppp_channel != NULL)
499
 
                ret = ppp_unit_number(network->ppp_channel);
500
 
        spin_unlock_irqrestore(&network->lock, flags);
501
 
 
502
 
        return ret;
503
 
}
504
 
 
505
 
int ipwireless_ppp_mru(const struct ipw_network *network)
506
 
{
507
 
        return network->mru;
508
 
}