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linux_util.c (256281) linux_util.c (293527)
1/*-
2 * Copyright (c) 1994 Christos Zoulas
3 * Copyright (c) 1995 Frank van der Linden
4 * Copyright (c) 1995 Scott Bartram
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions

--- 16 unchanged lines hidden (view full) ---

25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 * from: svr4_util.c,v 1.5 1995/01/22 23:44:50 christos Exp
30 */
31
32#include <sys/cdefs.h>
1/*-
2 * Copyright (c) 1994 Christos Zoulas
3 * Copyright (c) 1995 Frank van der Linden
4 * Copyright (c) 1995 Scott Bartram
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions

--- 16 unchanged lines hidden (view full) ---

25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 * from: svr4_util.c,v 1.5 1995/01/22 23:44:50 christos Exp
30 */
31
32#include <sys/cdefs.h>
33__FBSDID("$FreeBSD: stable/10/sys/compat/linux/linux_util.c 235063 2012-05-05 19:42:38Z netchild $");
33__FBSDID("$FreeBSD: stable/10/sys/compat/linux/linux_util.c 293527 2016-01-09 16:08:22Z dchagin $");
34
35#include "opt_compat.h"
36#include "opt_kdtrace.h"
37
38#include <sys/param.h>
39#include <sys/bus.h>
40#include <sys/fcntl.h>
41#include <sys/lock.h>

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48#include <sys/sdt.h>
49#include <sys/syscallsubr.h>
50#include <sys/systm.h>
51#include <sys/vnode.h>
52
53#include <machine/stdarg.h>
54
55#include <compat/linux/linux_util.h>
34
35#include "opt_compat.h"
36#include "opt_kdtrace.h"
37
38#include <sys/param.h>
39#include <sys/bus.h>
40#include <sys/fcntl.h>
41#include <sys/lock.h>

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48#include <sys/sdt.h>
49#include <sys/syscallsubr.h>
50#include <sys/systm.h>
51#include <sys/vnode.h>
52
53#include <machine/stdarg.h>
54
55#include <compat/linux/linux_util.h>
56#ifdef COMPAT_LINUX32
57#include <machine/../linux32/linux.h>
58#else
59#include <machine/../linux/linux.h>
60#endif
61
56
62#include <compat/linux/linux_dtrace.h>
57MALLOC_DEFINE(M_LINUX, "linux", "Linux mode structures");
63
64const char linux_emul_path[] = "/compat/linux";
65
58
59const char linux_emul_path[] = "/compat/linux";
60
66/* DTrace init */
67LIN_SDT_PROVIDER_DECLARE(LINUX_DTRACE);
68
69/**
70 * DTrace probes in this module.
71 */
72LIN_SDT_PROBE_DEFINE5(util, linux_emul_convpath, entry, "const char *",
73 "enum uio_seg", "char **", "int", "int");
74LIN_SDT_PROBE_DEFINE1(util, linux_emul_convpath, return, "int");
75LIN_SDT_PROBE_DEFINE1(util, linux_msg, entry, "const char *");
76LIN_SDT_PROBE_DEFINE0(util, linux_msg, return);
77LIN_SDT_PROBE_DEFINE2(util, linux_driver_get_name_dev, entry, "device_t",
78 "const char *");
79LIN_SDT_PROBE_DEFINE0(util, linux_driver_get_name_dev, nullcall);
80LIN_SDT_PROBE_DEFINE1(util, linux_driver_get_name_dev, return, "char *");
81LIN_SDT_PROBE_DEFINE3(util, linux_driver_get_major_minor, entry, "char *",
82 "int *", "int *");
83LIN_SDT_PROBE_DEFINE0(util, linux_driver_get_major_minor, nullcall);
84LIN_SDT_PROBE_DEFINE1(util, linux_driver_get_major_minor, notfound, "char *");
85LIN_SDT_PROBE_DEFINE3(util, linux_driver_get_major_minor, return, "int",
86 "int", "int");
87LIN_SDT_PROBE_DEFINE0(util, linux_get_char_devices, entry);
88LIN_SDT_PROBE_DEFINE1(util, linux_get_char_devices, return, "char *");
89LIN_SDT_PROBE_DEFINE1(util, linux_free_get_char_devices, entry, "char *");
90LIN_SDT_PROBE_DEFINE0(util, linux_free_get_char_devices, return);
91LIN_SDT_PROBE_DEFINE1(util, linux_device_register_handler, entry,
92 "struct linux_device_handler *");
93LIN_SDT_PROBE_DEFINE1(util, linux_device_register_handler, return, "int");
94LIN_SDT_PROBE_DEFINE1(util, linux_device_unregister_handler, entry,
95 "struct linux_device_handler *");
96LIN_SDT_PROBE_DEFINE1(util, linux_device_unregister_handler, return, "int");
97
98/*
99 * Search an alternate path before passing pathname arguments on to
100 * system calls. Useful for keeping a separate 'emulation tree'.
101 *
102 * If cflag is set, we check if an attempt can be made to create the
103 * named file, i.e. we check if the directory it should be in exists.
104 */
105int
106linux_emul_convpath(struct thread *td, const char *path, enum uio_seg pathseg,
107 char **pbuf, int cflag, int dfd)
108{
109 int retval;
110
61/*
62 * Search an alternate path before passing pathname arguments on to
63 * system calls. Useful for keeping a separate 'emulation tree'.
64 *
65 * If cflag is set, we check if an attempt can be made to create the
66 * named file, i.e. we check if the directory it should be in exists.
67 */
68int
69linux_emul_convpath(struct thread *td, const char *path, enum uio_seg pathseg,
70 char **pbuf, int cflag, int dfd)
71{
72 int retval;
73
111 LIN_SDT_PROBE5(util, linux_emul_convpath, entry, path, pathseg, pbuf,
112 cflag, dfd);
113
114 retval = kern_alternate_path(td, linux_emul_path, path, pathseg, pbuf,
115 cflag, dfd);
116
74 retval = kern_alternate_path(td, linux_emul_path, path, pathseg, pbuf,
75 cflag, dfd);
76
117 LIN_SDT_PROBE1(util, linux_emul_convpath, return, retval);
118 return (retval);
119}
120
121void
122linux_msg(const struct thread *td, const char *fmt, ...)
123{
124 va_list ap;
125 struct proc *p;
126
77 return (retval);
78}
79
80void
81linux_msg(const struct thread *td, const char *fmt, ...)
82{
83 va_list ap;
84 struct proc *p;
85
127 LIN_SDT_PROBE1(util, linux_msg, entry, fmt);
128
129 p = td->td_proc;
130 printf("linux: pid %d (%s): ", (int)p->p_pid, p->p_comm);
131 va_start(ap, fmt);
132 vprintf(fmt, ap);
133 va_end(ap);
134 printf("\n");
86 p = td->td_proc;
87 printf("linux: pid %d (%s): ", (int)p->p_pid, p->p_comm);
88 va_start(ap, fmt);
89 vprintf(fmt, ap);
90 va_end(ap);
91 printf("\n");
135
136 LIN_SDT_PROBE0(util, linux_msg, return);
137}
138
139struct device_element
140{
141 TAILQ_ENTRY(device_element) list;
142 struct linux_device_handler entry;
143};
144

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151DATA_SET(linux_device_handler_set, null_handler);
152
153char *
154linux_driver_get_name_dev(device_t dev)
155{
156 struct device_element *de;
157 const char *device_name = device_get_name(dev);
158
92}
93
94struct device_element
95{
96 TAILQ_ENTRY(device_element) list;
97 struct linux_device_handler entry;
98};
99

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106DATA_SET(linux_device_handler_set, null_handler);
107
108char *
109linux_driver_get_name_dev(device_t dev)
110{
111 struct device_element *de;
112 const char *device_name = device_get_name(dev);
113
159 LIN_SDT_PROBE2(util, linux_driver_get_name_dev, entry, dev,
160 device_name);
161
162 if (device_name == NULL) {
163 LIN_SDT_PROBE0(util, linux_driver_get_name_dev, nullcall);
164 LIN_SDT_PROBE1(util, linux_driver_get_name_dev, return, NULL);
114 if (device_name == NULL)
165 return NULL;
115 return NULL;
166 }
167 TAILQ_FOREACH(de, &devices, list) {
116 TAILQ_FOREACH(de, &devices, list) {
168 if (strcmp(device_name, de->entry.bsd_driver_name) == 0) {
169 LIN_SDT_PROBE1(util, linux_driver_get_name_dev, return,
170 de->entry.linux_driver_name);
117 if (strcmp(device_name, de->entry.bsd_driver_name) == 0)
171 return (de->entry.linux_driver_name);
118 return (de->entry.linux_driver_name);
172 }
173 }
174
119 }
120
175 LIN_SDT_PROBE1(util, linux_driver_get_name_dev, return, NULL);
176 return NULL;
121 return (NULL);
177}
178
179int
180linux_driver_get_major_minor(const char *node, int *major, int *minor)
181{
182 struct device_element *de;
183
122}
123
124int
125linux_driver_get_major_minor(const char *node, int *major, int *minor)
126{
127 struct device_element *de;
128
184 LIN_SDT_PROBE3(util, linux_driver_get_major_minor, entry, node, major,
185 minor);
186
187 if (node == NULL || major == NULL || minor == NULL) {
188 LIN_SDT_PROBE0(util, linux_driver_get_major_minor, nullcall);
189 LIN_SDT_PROBE3(util, linux_driver_get_major_minor, return, 1,
190 0, 0);
129 if (node == NULL || major == NULL || minor == NULL)
191 return 1;
130 return 1;
192 }
193
194 if (strlen(node) > strlen("pts/") &&
195 strncmp(node, "pts/", strlen("pts/")) == 0) {
196 unsigned long devno;
197
198 /*
199 * Linux checks major and minors of the slave device
200 * to make sure it's a pty device, so let's make him
201 * believe it is.
202 */
203 devno = strtoul(node + strlen("pts/"), NULL, 10);
204 *major = 136 + (devno / 256);
205 *minor = devno % 256;
206
131
132 if (strlen(node) > strlen("pts/") &&
133 strncmp(node, "pts/", strlen("pts/")) == 0) {
134 unsigned long devno;
135
136 /*
137 * Linux checks major and minors of the slave device
138 * to make sure it's a pty device, so let's make him
139 * believe it is.
140 */
141 devno = strtoul(node + strlen("pts/"), NULL, 10);
142 *major = 136 + (devno / 256);
143 *minor = devno % 256;
144
207 LIN_SDT_PROBE3(util, linux_driver_get_major_minor, return, 0,
208 *major, *minor);
209 return 0;
145 return (0);
210 }
211
212 TAILQ_FOREACH(de, &devices, list) {
213 if (strcmp(node, de->entry.bsd_device_name) == 0) {
214 *major = de->entry.linux_major;
215 *minor = de->entry.linux_minor;
146 }
147
148 TAILQ_FOREACH(de, &devices, list) {
149 if (strcmp(node, de->entry.bsd_device_name) == 0) {
150 *major = de->entry.linux_major;
151 *minor = de->entry.linux_minor;
216
217 LIN_SDT_PROBE3(util, linux_driver_get_major_minor,
218 return, 0, *major, *minor);
219 return 0;
152 return (0);
220 }
221 }
222
153 }
154 }
155
223 LIN_SDT_PROBE1(util, linux_driver_get_major_minor, notfound, node);
224 LIN_SDT_PROBE3(util, linux_driver_get_major_minor, return, 1, 0, 0);
225 return 1;
156 return (1);
226}
227
228char *
229linux_get_char_devices()
230{
231 struct device_element *de;
232 char *temp, *string, *last;
233 char formated[256];
234 int current_size = 0, string_size = 1024;
235
157}
158
159char *
160linux_get_char_devices()
161{
162 struct device_element *de;
163 char *temp, *string, *last;
164 char formated[256];
165 int current_size = 0, string_size = 1024;
166
236 LIN_SDT_PROBE0(util, linux_get_char_devices, entry);
237
238 string = malloc(string_size, M_LINUX, M_WAITOK);
239 string[0] = '\000';
240 last = "";
241 TAILQ_FOREACH(de, &devices, list) {
242 if (!de->entry.linux_char_device)
243 continue;
244 temp = string;
245 if (strcmp(last, de->entry.bsd_driver_name) != 0) {

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256 bcopy(temp, string, current_size);
257 free(temp, M_LINUX);
258 }
259 strcat(string, formated);
260 current_size = strlen(string);
261 }
262 }
263
167 string = malloc(string_size, M_LINUX, M_WAITOK);
168 string[0] = '\000';
169 last = "";
170 TAILQ_FOREACH(de, &devices, list) {
171 if (!de->entry.linux_char_device)
172 continue;
173 temp = string;
174 if (strcmp(last, de->entry.bsd_driver_name) != 0) {

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185 bcopy(temp, string, current_size);
186 free(temp, M_LINUX);
187 }
188 strcat(string, formated);
189 current_size = strlen(string);
190 }
191 }
192
264 LIN_SDT_PROBE1(util, linux_get_char_devices, return, string);
265 return string;
193 return (string);
266}
267
268void
269linux_free_get_char_devices(char *string)
270{
271
194}
195
196void
197linux_free_get_char_devices(char *string)
198{
199
272 LIN_SDT_PROBE1(util, linux_get_char_devices, entry, string);
273
274 free(string, M_LINUX);
200 free(string, M_LINUX);
275
276 LIN_SDT_PROBE0(util, linux_get_char_devices, return);
277}
278
279static int linux_major_starting = 200;
280
281int
282linux_device_register_handler(struct linux_device_handler *d)
283{
284 struct device_element *de;
285
201}
202
203static int linux_major_starting = 200;
204
205int
206linux_device_register_handler(struct linux_device_handler *d)
207{
208 struct device_element *de;
209
286 LIN_SDT_PROBE1(util, linux_device_register_handler, entry, d);
287
288 if (d == NULL) {
289 LIN_SDT_PROBE1(util, linux_device_register_handler, return,
290 EINVAL);
210 if (d == NULL)
291 return (EINVAL);
211 return (EINVAL);
292 }
293
294 de = malloc(sizeof(*de), M_LINUX, M_WAITOK);
295 if (d->linux_major < 0) {
296 d->linux_major = linux_major_starting++;
297 }
298 bcopy(d, &de->entry, sizeof(*d));
299
300 /* Add the element to the list, sorted on span. */
301 TAILQ_INSERT_TAIL(&devices, de, list);
302
212
213 de = malloc(sizeof(*de), M_LINUX, M_WAITOK);
214 if (d->linux_major < 0) {
215 d->linux_major = linux_major_starting++;
216 }
217 bcopy(d, &de->entry, sizeof(*d));
218
219 /* Add the element to the list, sorted on span. */
220 TAILQ_INSERT_TAIL(&devices, de, list);
221
303 LIN_SDT_PROBE1(util, linux_device_register_handler, return, 0);
304 return (0);
305}
306
307int
308linux_device_unregister_handler(struct linux_device_handler *d)
309{
310 struct device_element *de;
311
222 return (0);
223}
224
225int
226linux_device_unregister_handler(struct linux_device_handler *d)
227{
228 struct device_element *de;
229
312 LIN_SDT_PROBE1(util, linux_device_unregister_handler, entry, d);
313
314 if (d == NULL) {
315 LIN_SDT_PROBE1(util, linux_device_unregister_handler, return,
316 EINVAL);
230 if (d == NULL)
317 return (EINVAL);
231 return (EINVAL);
318 }
319
320 TAILQ_FOREACH(de, &devices, list) {
321 if (bcmp(d, &de->entry, sizeof(*d)) == 0) {
322 TAILQ_REMOVE(&devices, de, list);
323 free(de, M_LINUX);
324
232
233 TAILQ_FOREACH(de, &devices, list) {
234 if (bcmp(d, &de->entry, sizeof(*d)) == 0) {
235 TAILQ_REMOVE(&devices, de, list);
236 free(de, M_LINUX);
237
325 LIN_SDT_PROBE1(util, linux_device_unregister_handler,
326 return, 0);
327 return (0);
328 }
329 }
330
238 return (0);
239 }
240 }
241
331 LIN_SDT_PROBE1(util, linux_device_unregister_handler, return, EINVAL);
332 return (EINVAL);
333}
242 return (EINVAL);
243}