linux_util.c (38f1b189cd839bd8aa122ae06cc084810ca1e395) linux_util.c (19e252baebe7a7466b33c27560420b7d95fe294d)
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

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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("$FreeBSD$");
34
35#include "opt_compat.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

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

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("$FreeBSD$");
34
35#include "opt_compat.h"
36#include "opt_kdtrace.h"
36
37#include <sys/param.h>
38#include <sys/bus.h>
39#include <sys/fcntl.h>
40#include <sys/lock.h>
41#include <sys/malloc.h>
37
38#include <sys/param.h>
39#include <sys/bus.h>
40#include <sys/fcntl.h>
41#include <sys/lock.h>
42#include <sys/malloc.h>
43#include <sys/kernel.h>
42#include <sys/linker_set.h>
43#include <sys/mutex.h>
44#include <sys/namei.h>
45#include <sys/proc.h>
44#include <sys/linker_set.h>
45#include <sys/mutex.h>
46#include <sys/namei.h>
47#include <sys/proc.h>
48#include <sys/sdt.h>
46#include <sys/syscallsubr.h>
47#include <sys/systm.h>
48#include <sys/vnode.h>
49
50#include <machine/stdarg.h>
51
52#include <compat/linux/linux_util.h>
53#ifdef COMPAT_LINUX32
54#include <machine/../linux32/linux.h>
55#else
56#include <machine/../linux/linux.h>
57#endif
58
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
62#include <compat/linux/linux_dtrace.h>
63
59const char linux_emul_path[] = "/compat/linux";
60
64const char linux_emul_path[] = "/compat/linux";
65
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
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
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
69linux_emul_convpath(td, path, pathseg, pbuf, cflag, dfd)
70 struct thread *td;
71 const char *path;
72 enum uio_seg pathseg;
73 char **pbuf;
74 int cflag;
75 int dfd;
106linux_emul_convpath(struct thread *td, const char *path, enum uio_seg pathseg,
107 char **pbuf, int cflag, int dfd)
76{
108{
109 int retval;
77
110
78 return (kern_alternate_path(td, linux_emul_path, path, pathseg, pbuf,
79 cflag, dfd));
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
117 LIN_SDT_PROBE1(util, linux_emul_convpath, return, retval);
118 return (retval);
80}
81
82void
83linux_msg(const struct thread *td, const char *fmt, ...)
84{
85 va_list ap;
86 struct proc *p;
87
119}
120
121void
122linux_msg(const struct thread *td, const char *fmt, ...)
123{
124 va_list ap;
125 struct proc *p;
126
127 LIN_SDT_PROBE1(util, linux_msg, entry, fmt);
128
88 p = td->td_proc;
89 printf("linux: pid %d (%s): ", (int)p->p_pid, p->p_comm);
90 va_start(ap, fmt);
91 vprintf(fmt, ap);
92 va_end(ap);
93 printf("\n");
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");
135
136 LIN_SDT_PROBE0(util, linux_msg, return);
94}
95
96struct device_element
97{
98 TAILQ_ENTRY(device_element) list;
99 struct linux_device_handler entry;
100};
101

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108DATA_SET(linux_device_handler_set, null_handler);
109
110char *
111linux_driver_get_name_dev(device_t dev)
112{
113 struct device_element *de;
114 const char *device_name = device_get_name(dev);
115
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
116 if (device_name == NULL)
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);
117 return NULL;
165 return NULL;
166 }
118 TAILQ_FOREACH(de, &devices, list) {
167 TAILQ_FOREACH(de, &devices, list) {
119 if (strcmp(device_name, de->entry.bsd_driver_name) == 0)
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);
120 return (de->entry.linux_driver_name);
171 return (de->entry.linux_driver_name);
172 }
121 }
122
173 }
174
175 LIN_SDT_PROBE1(util, linux_driver_get_name_dev, return, NULL);
123 return NULL;
124}
125
126int
127linux_driver_get_major_minor(const char *node, int *major, int *minor)
128{
129 struct device_element *de;
130
176 return NULL;
177}
178
179int
180linux_driver_get_major_minor(const char *node, int *major, int *minor)
181{
182 struct device_element *de;
183
131 if (node == NULL || major == NULL || minor == NULL)
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);
132 return 1;
191 return 1;
192 }
133
134 if (strlen(node) > strlen("pts/") &&
135 strncmp(node, "pts/", strlen("pts/")) == 0) {
136 unsigned long devno;
137
138 /*
139 * Linux checks major and minors of the slave device
140 * to make sure it's a pty device, so let's make him
141 * believe it is.
142 */
143 devno = strtoul(node + strlen("pts/"), NULL, 10);
144 *major = 136 + (devno / 256);
145 *minor = devno % 256;
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
207 LIN_SDT_PROBE3(util, linux_driver_get_major_minor, return, 0,
208 *major, *minor);
146 return 0;
147 }
148
149 TAILQ_FOREACH(de, &devices, list) {
150 if (strcmp(node, de->entry.bsd_device_name) == 0) {
151 *major = de->entry.linux_major;
152 *minor = de->entry.linux_minor;
209 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;
216
217 LIN_SDT_PROBE3(util, linux_driver_get_major_minor,
218 return, 0, *major, *minor);
153 return 0;
154 }
155 }
156
219 return 0;
220 }
221 }
222
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);
157 return 1;
158}
159
160char *
161linux_get_char_devices()
162{
163 struct device_element *de;
164 char *temp, *string, *last;
165 char formated[256];
166 int current_size = 0, string_size = 1024;
167
225 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
236 LIN_SDT_PROBE0(util, linux_get_char_devices, entry);
237
168 string = malloc(string_size, M_LINUX, M_WAITOK);
169 string[0] = '\000';
170 last = "";
171 TAILQ_FOREACH(de, &devices, list) {
172 if (!de->entry.linux_char_device)
173 continue;
174 temp = string;
175 if (strcmp(last, de->entry.bsd_driver_name) != 0) {

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186 bcopy(temp, string, current_size);
187 free(temp, M_LINUX);
188 }
189 strcat(string, formated);
190 current_size = strlen(string);
191 }
192 }
193
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
264 LIN_SDT_PROBE1(util, linux_get_char_devices, return, string);
194 return string;
195}
196
197void
198linux_free_get_char_devices(char *string)
199{
265 return string;
266}
267
268void
269linux_free_get_char_devices(char *string)
270{
271
272 LIN_SDT_PROBE1(util, linux_get_char_devices, entry, string);
273
200 free(string, M_LINUX);
274 free(string, M_LINUX);
275
276 LIN_SDT_PROBE0(util, linux_get_char_devices, return);
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
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
210 if (d == NULL)
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);
211 return (EINVAL);
291 return (EINVAL);
292 }
212
293
213 de = malloc(sizeof(*de),
214 M_LINUX, M_WAITOK);
294 de = malloc(sizeof(*de), M_LINUX, M_WAITOK);
215 if (d->linux_major < 0) {
216 d->linux_major = linux_major_starting++;
217 }
218 bcopy(d, &de->entry, sizeof(*d));
219
220 /* Add the element to the list, sorted on span. */
221 TAILQ_INSERT_TAIL(&devices, de, list);
222
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
303 LIN_SDT_PROBE1(util, linux_device_register_handler, return, 0);
223 return (0);
224}
225
226int
227linux_device_unregister_handler(struct linux_device_handler *d)
228{
229 struct device_element *de;
230
304 return (0);
305}
306
307int
308linux_device_unregister_handler(struct linux_device_handler *d)
309{
310 struct device_element *de;
311
231 if (d == NULL)
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);
232 return (EINVAL);
317 return (EINVAL);
318 }
233
234 TAILQ_FOREACH(de, &devices, list) {
235 if (bcmp(d, &de->entry, sizeof(*d)) == 0) {
236 TAILQ_REMOVE(&devices, de, list);
237 free(de, M_LINUX);
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
325 LIN_SDT_PROBE1(util, linux_device_unregister_handler,
326 return, 0);
238 return (0);
239 }
240 }
241
327 return (0);
328 }
329 }
330
331 LIN_SDT_PROBE1(util, linux_device_unregister_handler, return, EINVAL);
242 return (EINVAL);
243}
332 return (EINVAL);
333}