1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
|
From f3d652840f8dd959395065a1cf67ca40b04ec69b Mon Sep 17 00:00:00 2001
From: Joan Bruguera <joanbrugueram@gmail.com>
Date: Tue, 13 Oct 2020 19:35:55 +0200
Subject: [PATCH] Get rid of get_fs/set_fs calls in Broadcom WL driver.
Tentative patch for broadcom-wl 6.30.223.271 driver for Linux 5.10 (tested -rc1 up to 5.10.1)
Applies on top of all the patches applied to broadcom-wl-dkms 6.30.223.271-23 on Arch Linux.
NB: Some checks in wlc_ioctl_internal are likely superfluous,
but I'm not familiar enough with the driver to remove them with confidence.
See also: https://lwn.net/Articles/722267/
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=47058bb54b57962b3958a936ddbc59355e4c5504
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5e6e9852d6f76e01b2e6803c74258afa5b432bc5
Signed-off-by: Joan Bruguera <joanbrugueram@gmail.com>
---
src/wl/sys/wl_cfg80211_hybrid.c | 25 ++-------------------
src/wl/sys/wl_iw.c | 25 ++-------------------
src/wl/sys/wl_linux.c | 40 ++++++++++++++++++++++++++++-----
src/wl/sys/wl_linux.h | 2 ++
src/wl/sys/wlc_pub.h | 1 +
5 files changed, 42 insertions(+), 51 deletions(-)
diff --git a/src/wl/sys/wl_cfg80211_hybrid.c b/src/wl/sys/wl_cfg80211_hybrid.c
index 7b606e0..1e0adb7 100644
--- a/src/wl/sys/wl_cfg80211_hybrid.c
+++ b/src/wl/sys/wl_cfg80211_hybrid.c
@@ -38,6 +38,7 @@
#include <wlioctl.h>
#include <proto/802.11.h>
#include <wl_cfg80211_hybrid.h>
+#include <wl_linux.h>
#define EVENT_TYPE(e) dtoh32((e)->event_type)
#define EVENT_FLAGS(e) dtoh16((e)->flags)
@@ -435,30 +436,7 @@ static void key_endian_to_host(struct wl_wsec_key *key)
static s32
wl_dev_ioctl(struct net_device *dev, u32 cmd, void *arg, u32 len)
{
- struct ifreq ifr;
- struct wl_ioctl ioc;
- mm_segment_t fs;
- s32 err = 0;
-
- BUG_ON(len < sizeof(int));
-
- memset(&ioc, 0, sizeof(ioc));
- ioc.cmd = cmd;
- ioc.buf = arg;
- ioc.len = len;
- strcpy(ifr.ifr_name, dev->name);
- ifr.ifr_data = (caddr_t)&ioc;
-
- fs = get_fs();
- set_fs(get_ds());
-#if defined(WL_USE_NETDEV_OPS)
- err = dev->netdev_ops->ndo_do_ioctl(dev, &ifr, SIOCDEVPRIVATE);
-#else
- err = dev->do_ioctl(dev, &ifr, SIOCDEVPRIVATE);
-#endif
- set_fs(fs);
-
- return err;
+ return wlc_ioctl_internal(dev, cmd, arg, len);
}
static s32
diff --git a/src/wl/sys/wl_iw.c b/src/wl/sys/wl_iw.c
index c4c610b..e346b15 100644
--- a/src/wl/sys/wl_iw.c
+++ b/src/wl/sys/wl_iw.c
@@ -37,6 +37,7 @@ typedef const struct si_pub si_t;
#include <wl_dbg.h>
#include <wl_iw.h>
+#include <wl_linux.h>
extern bool wl_iw_conn_status_str(uint32 event_type, uint32 status,
uint32 reason, char* stringBuf, uint buflen);
@@ -103,29 +104,7 @@ dev_wlc_ioctl(
int len
)
{
- struct ifreq ifr;
- wl_ioctl_t ioc;
- mm_segment_t fs;
- int ret;
-
- memset(&ioc, 0, sizeof(ioc));
- ioc.cmd = cmd;
- ioc.buf = arg;
- ioc.len = len;
-
- strcpy(ifr.ifr_name, dev->name);
- ifr.ifr_data = (caddr_t) &ioc;
-
- fs = get_fs();
- set_fs(get_ds());
-#if defined(WL_USE_NETDEV_OPS)
- ret = dev->netdev_ops->ndo_do_ioctl(dev, &ifr, SIOCDEVPRIVATE);
-#else
- ret = dev->do_ioctl(dev, &ifr, SIOCDEVPRIVATE);
-#endif
- set_fs(fs);
-
- return ret;
+ return wlc_ioctl_internal(dev, cmd, arg, len);
}
static int
diff --git a/src/wl/sys/wl_linux.c b/src/wl/sys/wl_linux.c
index 947cef3..f04c148 100644
--- a/src/wl/sys/wl_linux.c
+++ b/src/wl/sys/wl_linux.c
@@ -1643,10 +1643,7 @@ wl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
goto done2;
}
- if (segment_eq(get_fs(), KERNEL_DS))
- buf = ioc.buf;
-
- else if (ioc.buf) {
+ if (ioc.buf) {
if (!(buf = (void *) MALLOC(wl->osh, MAX(ioc.len, WLC_IOCTL_MAXLEN)))) {
bcmerror = BCME_NORESOURCE;
goto done2;
@@ -1667,7 +1664,7 @@ wl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
WL_UNLOCK(wl);
done1:
- if (ioc.buf && (ioc.buf != buf)) {
+ if (ioc.buf) {
if (copy_to_user(ioc.buf, buf, ioc.len))
bcmerror = BCME_BADADDR;
MFREE(wl->osh, buf, MAX(ioc.len, WLC_IOCTL_MAXLEN));
@@ -1680,6 +1677,39 @@ done2:
return (OSL_ERROR(bcmerror));
}
+int
+wlc_ioctl_internal(struct net_device *dev, int cmd, void *buf, int len)
+{
+ wl_info_t *wl;
+ wl_if_t *wlif;
+ int bcmerror;
+
+ if (!dev)
+ return -ENETDOWN;
+
+ wl = WL_INFO(dev);
+ wlif = WL_DEV_IF(dev);
+ if (wlif == NULL || wl == NULL || wl->dev == NULL)
+ return -ENETDOWN;
+
+ bcmerror = 0;
+
+ WL_TRACE(("wl%d: wlc_ioctl_internal: cmd 0x%x\n", wl->pub->unit, cmd));
+
+ WL_LOCK(wl);
+ if (!capable(CAP_NET_ADMIN)) {
+ bcmerror = BCME_EPERM;
+ } else {
+ bcmerror = wlc_ioctl(wl->wlc, cmd, buf, len, wlif->wlcif);
+ }
+ WL_UNLOCK(wl);
+
+ ASSERT(VALID_BCMERROR(bcmerror));
+ if (bcmerror != 0)
+ wl->pub->bcmerror = bcmerror;
+ return (OSL_ERROR(bcmerror));
+}
+
static struct net_device_stats*
wl_get_stats(struct net_device *dev)
{
diff --git a/src/wl/sys/wl_linux.h b/src/wl/sys/wl_linux.h
index 5b1048e..c8c1f41 100644
--- a/src/wl/sys/wl_linux.h
+++ b/src/wl/sys/wl_linux.h
@@ -22,6 +22,7 @@
#define _wl_linux_h_
#include <wlc_types.h>
+#include <wlc_pub.h>
typedef struct wl_timer {
struct timer_list timer;
@@ -187,6 +188,7 @@ extern irqreturn_t wl_isr(int irq, void *dev_id, struct pt_regs *ptregs);
extern int __devinit wl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
extern void wl_free(wl_info_t *wl);
extern int wl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
+extern int wlc_ioctl_internal(struct net_device *dev, int cmd, void *buf, int len);
extern struct net_device * wl_netdev_get(wl_info_t *wl);
#endif
diff --git a/src/wl/sys/wlc_pub.h b/src/wl/sys/wlc_pub.h
index 53a98b8..2b5a029 100644
--- a/src/wl/sys/wlc_pub.h
+++ b/src/wl/sys/wlc_pub.h
@@ -24,6 +24,7 @@
#include <wlc_types.h>
#include <wlc_utils.h>
+#include <siutils.h>
#include "proto/802.11.h"
#include "proto/bcmevent.h"
--
2.28.0
|
