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716154c5 BB |
1 | /*****************************************************************************\ |
2 | * Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC. | |
3 | * Copyright (C) 2007 The Regents of the University of California. | |
4 | * Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER). | |
5 | * Written by Brian Behlendorf <behlendorf1@llnl.gov>. | |
715f6251 | 6 | * UCRL-CODE-235197 |
7 | * | |
716154c5 BB |
8 | * This file is part of the SPL, Solaris Porting Layer. |
9 | * For details, see <http://github.com/behlendorf/spl/>. | |
10 | * | |
11 | * The SPL is free software; you can redistribute it and/or modify it | |
12 | * under the terms of the GNU General Public License as published by the | |
13 | * Free Software Foundation; either version 2 of the License, or (at your | |
14 | * option) any later version. | |
715f6251 | 15 | * |
716154c5 | 16 | * The SPL is distributed in the hope that it will be useful, but WITHOUT |
715f6251 | 17 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
18 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
19 | * for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License along | |
716154c5 BB |
22 | * with the SPL. If not, see <http://www.gnu.org/licenses/>. |
23 | ***************************************************************************** | |
24 | * Solaris Porting Layer (SPL) Generic Implementation. | |
25 | \*****************************************************************************/ | |
715f6251 | 26 | |
14c5326c | 27 | #include <sys/sysmacros.h> |
99639e4a | 28 | #include <sys/systeminfo.h> |
af828292 | 29 | #include <sys/vmsystm.h> |
30 | #include <sys/vnode.h> | |
c19c06f3 | 31 | #include <sys/kmem.h> |
9ab1ac14 | 32 | #include <sys/mutex.h> |
d28db80f | 33 | #include <sys/rwlock.h> |
e9cb2b4f | 34 | #include <sys/taskq.h> |
8d0f1ee9 | 35 | #include <sys/debug.h> |
57d1b188 | 36 | #include <sys/proc.h> |
04a479f7 | 37 | #include <sys/kstat.h> |
691d2bd7 | 38 | #include <sys/utsname.h> |
d3126abe | 39 | #include <sys/file.h> |
f23e92fa | 40 | #include <linux/kmod.h> |
ae4c36ad | 41 | #include <linux/proc_compat.h> |
f1b59d26 | 42 | |
57d1b188 | 43 | #ifdef DEBUG_SUBSYSTEM |
44 | #undef DEBUG_SUBSYSTEM | |
45 | #endif | |
8d0f1ee9 | 46 | |
57d1b188 | 47 | #define DEBUG_SUBSYSTEM S_GENERIC |
f23e92fa | 48 | |
0cbaeb11 | 49 | char spl_version[16] = "SPL v" SPL_META_VERSION; |
1a73940d | 50 | EXPORT_SYMBOL(spl_version); |
3561541c | 51 | |
937879f1 | 52 | long spl_hostid = 0; |
f23e92fa | 53 | EXPORT_SYMBOL(spl_hostid); |
8d0f1ee9 | 54 | |
99639e4a | 55 | char hw_serial[HW_HOSTID_LEN] = "<none>"; |
937879f1 | 56 | EXPORT_SYMBOL(hw_serial); |
f1b59d26 | 57 | |
ae4c36ad | 58 | proc_t p0 = { 0 }; |
f1b59d26 | 59 | EXPORT_SYMBOL(p0); |
70eadc19 | 60 | |
d1ff2312 | 61 | #ifndef HAVE_KALLSYMS_LOOKUP_NAME |
96dded38 | 62 | kallsyms_lookup_name_t spl_kallsyms_lookup_name_fn = SYMBOL_POISON; |
d1ff2312 BB |
63 | #endif |
64 | ||
77b1fe8f | 65 | int |
66 | highbit(unsigned long i) | |
67 | { | |
68 | register int h = 1; | |
3d061e9d | 69 | ENTRY; |
77b1fe8f | 70 | |
71 | if (i == 0) | |
57d1b188 | 72 | RETURN(0); |
77b1fe8f | 73 | #if BITS_PER_LONG == 64 |
74 | if (i & 0xffffffff00000000ul) { | |
75 | h += 32; i >>= 32; | |
76 | } | |
77 | #endif | |
78 | if (i & 0xffff0000) { | |
79 | h += 16; i >>= 16; | |
80 | } | |
81 | if (i & 0xff00) { | |
82 | h += 8; i >>= 8; | |
83 | } | |
84 | if (i & 0xf0) { | |
85 | h += 4; i >>= 4; | |
86 | } | |
87 | if (i & 0xc) { | |
88 | h += 2; i >>= 2; | |
89 | } | |
90 | if (i & 0x2) { | |
91 | h += 1; | |
92 | } | |
57d1b188 | 93 | RETURN(h); |
77b1fe8f | 94 | } |
95 | EXPORT_SYMBOL(highbit); | |
96 | ||
b61a6e8b | 97 | /* |
550f1705 | 98 | * Implementation of 64 bit division for 32-bit machines. |
b61a6e8b | 99 | */ |
550f1705 | 100 | #if BITS_PER_LONG == 32 |
1b4ad25e AZ |
101 | uint64_t |
102 | __udivdi3(uint64_t dividend, uint64_t divisor) | |
b61a6e8b | 103 | { |
96dded38 | 104 | #if defined(HAVE_DIV64_64) /* 2.6.22 - 2.6.25 API */ |
550f1705 | 105 | return div64_64(dividend, divisor); |
96dded38 BB |
106 | #elif defined(HAVE_DIV64_U64) /* 2.6.26 - 2.6.x API */ |
107 | return div64_u64(dividend, divisor); | |
550f1705 | 108 | #else |
96dded38 | 109 | /* Implementation from 2.6.30 kernel */ |
b61a6e8b | 110 | uint32_t high, d; |
111 | ||
112 | high = divisor >> 32; | |
113 | if (high) { | |
114 | unsigned int shift = fls(high); | |
115 | ||
116 | d = divisor >> shift; | |
117 | dividend >>= shift; | |
118 | } else | |
119 | d = divisor; | |
120 | ||
db1aa222 BB |
121 | do_div(dividend, d); |
122 | ||
123 | return dividend; | |
96dded38 | 124 | #endif /* HAVE_DIV64_64, HAVE_DIV64_U64 */ |
550f1705 | 125 | } |
126 | EXPORT_SYMBOL(__udivdi3); | |
127 | ||
128 | /* | |
129 | * Implementation of 64 bit modulo for 32-bit machines. | |
130 | */ | |
1b4ad25e AZ |
131 | uint64_t |
132 | __umoddi3(uint64_t dividend, uint64_t divisor) | |
550f1705 | 133 | { |
1b4ad25e | 134 | return (dividend - (divisor * __udivdi3(dividend, divisor))); |
b61a6e8b | 135 | } |
550f1705 | 136 | EXPORT_SYMBOL(__umoddi3); |
96dded38 | 137 | #endif /* BITS_PER_LONG */ |
b61a6e8b | 138 | |
b871b8cd BB |
139 | /* NOTE: The strtoxx behavior is solely based on my reading of the Solaris |
140 | * ddi_strtol(9F) man page. I have not verified the behavior of these | |
141 | * functions against their Solaris counterparts. It is possible that I | |
96dded38 | 142 | * may have misinterpreted the man page or the man page is incorrect. |
b871b8cd | 143 | */ |
2ee63a54 BB |
144 | int ddi_strtoul(const char *, char **, int, unsigned long *); |
145 | int ddi_strtol(const char *, char **, int, long *); | |
146 | int ddi_strtoull(const char *, char **, int, unsigned long long *); | |
147 | int ddi_strtoll(const char *, char **, int, long long *); | |
148 | ||
149 | #define define_ddi_strtoux(type, valtype) \ | |
150 | int ddi_strtou##type(const char *str, char **endptr, \ | |
b871b8cd | 151 | int base, valtype *result) \ |
2ee63a54 | 152 | { \ |
b871b8cd BB |
153 | valtype last_value, value = 0; \ |
154 | char *ptr = (char *)str; \ | |
155 | int flag = 1, digit; \ | |
156 | \ | |
157 | if (strlen(ptr) == 0) \ | |
158 | return EINVAL; \ | |
159 | \ | |
160 | /* Auto-detect base based on prefix */ \ | |
161 | if (!base) { \ | |
162 | if (str[0] == '0') { \ | |
163 | if (tolower(str[1])=='x' && isxdigit(str[2])) { \ | |
164 | base = 16; /* hex */ \ | |
165 | ptr += 2; \ | |
166 | } else if (str[1] >= '0' && str[1] < 8) { \ | |
167 | base = 8; /* octal */ \ | |
168 | ptr += 1; \ | |
169 | } else { \ | |
170 | return EINVAL; \ | |
171 | } \ | |
172 | } else { \ | |
173 | base = 10; /* decimal */ \ | |
174 | } \ | |
175 | } \ | |
176 | \ | |
177 | while (1) { \ | |
178 | if (isdigit(*ptr)) \ | |
179 | digit = *ptr - '0'; \ | |
180 | else if (isalpha(*ptr)) \ | |
181 | digit = tolower(*ptr) - 'a' + 10; \ | |
182 | else \ | |
183 | break; \ | |
184 | \ | |
185 | if (digit >= base) \ | |
186 | break; \ | |
2ee63a54 | 187 | \ |
b871b8cd BB |
188 | last_value = value; \ |
189 | value = value * base + digit; \ | |
190 | if (last_value > value) /* Overflow */ \ | |
191 | return ERANGE; \ | |
2ee63a54 | 192 | \ |
b871b8cd BB |
193 | flag = 1; \ |
194 | ptr++; \ | |
2ee63a54 BB |
195 | } \ |
196 | \ | |
b871b8cd BB |
197 | if (flag) \ |
198 | *result = value; \ | |
199 | \ | |
200 | if (endptr) \ | |
201 | *endptr = (char *)(flag ? ptr : str); \ | |
202 | \ | |
203 | return 0; \ | |
2ee63a54 BB |
204 | } \ |
205 | ||
206 | #define define_ddi_strtox(type, valtype) \ | |
207 | int ddi_strto##type(const char *str, char **endptr, \ | |
208 | int base, valtype *result) \ | |
b871b8cd BB |
209 | { \ |
210 | int rc; \ | |
2ee63a54 BB |
211 | \ |
212 | if (*str == '-') { \ | |
b871b8cd BB |
213 | rc = ddi_strtou##type(str + 1, endptr, base, result); \ |
214 | if (!rc) { \ | |
215 | if (*endptr == str + 1) \ | |
216 | *endptr = (char *)str; \ | |
217 | else \ | |
218 | *result = -*result; \ | |
219 | } \ | |
2ee63a54 | 220 | } else { \ |
b871b8cd | 221 | rc = ddi_strtou##type(str, endptr, base, result); \ |
2ee63a54 BB |
222 | } \ |
223 | \ | |
b871b8cd BB |
224 | return rc; \ |
225 | } | |
2ee63a54 BB |
226 | |
227 | define_ddi_strtoux(l, unsigned long) | |
228 | define_ddi_strtox(l, long) | |
229 | define_ddi_strtoux(ll, unsigned long long) | |
230 | define_ddi_strtox(ll, long long) | |
231 | ||
2f5d55aa | 232 | EXPORT_SYMBOL(ddi_strtoul); |
2ee63a54 BB |
233 | EXPORT_SYMBOL(ddi_strtol); |
234 | EXPORT_SYMBOL(ddi_strtoll); | |
235 | EXPORT_SYMBOL(ddi_strtoull); | |
2f5d55aa | 236 | |
d3126abe BB |
237 | int |
238 | ddi_copyin(const void *from, void *to, size_t len, int flags) | |
239 | { | |
240 | /* Fake ioctl() issued by kernel, 'from' is a kernel address */ | |
241 | if (flags & FKIOCTL) { | |
242 | memcpy(to, from, len); | |
243 | return 0; | |
244 | } | |
245 | ||
246 | return copyin(from, to, len); | |
247 | } | |
248 | EXPORT_SYMBOL(ddi_copyin); | |
249 | ||
250 | int | |
251 | ddi_copyout(const void *from, void *to, size_t len, int flags) | |
252 | { | |
253 | /* Fake ioctl() issued by kernel, 'from' is a kernel address */ | |
254 | if (flags & FKIOCTL) { | |
255 | memcpy(to, from, len); | |
256 | return 0; | |
257 | } | |
258 | ||
259 | return copyout(from, to, len); | |
260 | } | |
261 | EXPORT_SYMBOL(ddi_copyout); | |
262 | ||
e811949a BB |
263 | #ifndef HAVE_PUT_TASK_STRUCT |
264 | /* | |
265 | * This is only a stub function which should never be used. The SPL should | |
266 | * never be putting away the last reference on a task structure so this will | |
267 | * not be called. However, we still need to define it so the module does not | |
268 | * have undefined symbol at load time. That all said if this impossible | |
269 | * thing does somehow happen SBUG() immediately so we know about it. | |
270 | */ | |
271 | void | |
272 | __put_task_struct(struct task_struct *t) | |
273 | { | |
274 | SBUG(); | |
275 | } | |
276 | EXPORT_SYMBOL(__put_task_struct); | |
277 | #endif /* HAVE_PUT_TASK_STRUCT */ | |
278 | ||
691d2bd7 | 279 | struct new_utsname *__utsname(void) |
280 | { | |
3d061e9d | 281 | #ifdef HAVE_INIT_UTSNAME |
691d2bd7 | 282 | return init_utsname(); |
3d061e9d | 283 | #else |
284 | return &system_utsname; | |
285 | #endif | |
691d2bd7 | 286 | } |
287 | EXPORT_SYMBOL(__utsname); | |
288 | ||
8d0f1ee9 | 289 | static int |
57d1b188 | 290 | set_hostid(void) |
8d0f1ee9 | 291 | { |
f23e92fa | 292 | char sh_path[] = "/bin/sh"; |
293 | char *argv[] = { sh_path, | |
294 | "-c", | |
57d86234 | 295 | "/usr/bin/hostid >/proc/sys/kernel/spl/hostid", |
f23e92fa | 296 | NULL }; |
297 | char *envp[] = { "HOME=/", | |
298 | "TERM=linux", | |
299 | "PATH=/sbin:/usr/sbin:/bin:/usr/bin", | |
300 | NULL }; | |
96dded38 | 301 | int rc; |
8d0f1ee9 | 302 | |
57d1b188 | 303 | /* Doing address resolution in the kernel is tricky and just |
937879f1 | 304 | * not a good idea in general. So to set the proper 'hw_serial' |
57d1b188 | 305 | * use the usermodehelper support to ask '/bin/sh' to run |
306 | * '/usr/bin/hostid' and redirect the result to /proc/sys/spl/hostid | |
96dded38 | 307 | * for us to use. It's a horrific solution but it will do for now. |
57d1b188 | 308 | */ |
96dded38 BB |
309 | rc = call_usermodehelper(sh_path, argv, envp, 1); |
310 | if (rc) | |
311 | printk("SPL: Failed user helper '%s %s %s', rc = %d\n", | |
312 | argv[0], argv[1], argv[2], rc); | |
313 | ||
314 | return rc; | |
57d1b188 | 315 | } |
8d0f1ee9 | 316 | |
99639e4a BB |
317 | uint32_t |
318 | zone_get_hostid(void *zone) | |
319 | { | |
320 | unsigned long hostid; | |
321 | ||
322 | /* Only the global zone is supported */ | |
323 | ASSERT(zone == NULL); | |
324 | ||
325 | if (ddi_strtoul(hw_serial, NULL, HW_HOSTID_LEN-1, &hostid) != 0) | |
326 | return HW_INVALID_HOSTID; | |
327 | ||
328 | return (uint32_t)hostid; | |
329 | } | |
330 | EXPORT_SYMBOL(zone_get_hostid); | |
331 | ||
96dded38 | 332 | #ifndef HAVE_KALLSYMS_LOOKUP_NAME |
d1ff2312 BB |
333 | /* |
334 | * Because kallsyms_lookup_name() is no longer exported in the | |
335 | * mainline kernel we are forced to resort to somewhat drastic | |
336 | * measures. This function replaces the functionality by performing | |
337 | * an upcall to user space where /proc/kallsyms is consulted for | |
338 | * the requested address. | |
339 | */ | |
340 | #define GET_KALLSYMS_ADDR_CMD \ | |
341 | "awk '{ if ( $3 == \"kallsyms_lookup_name\") { print $1 } }' " \ | |
342 | "/proc/kallsyms >/proc/sys/kernel/spl/kallsyms_lookup_name" | |
343 | ||
344 | static int | |
345 | set_kallsyms_lookup_name(void) | |
346 | { | |
347 | char sh_path[] = "/bin/sh"; | |
348 | char *argv[] = { sh_path, | |
349 | "-c", | |
350 | GET_KALLSYMS_ADDR_CMD, | |
351 | NULL }; | |
352 | char *envp[] = { "HOME=/", | |
353 | "TERM=linux", | |
354 | "PATH=/sbin:/usr/sbin:/bin:/usr/bin", | |
355 | NULL }; | |
356 | int rc; | |
357 | ||
358 | rc = call_usermodehelper(sh_path, argv, envp, 1); | |
359 | if (rc) | |
96dded38 BB |
360 | printk("SPL: Failed user helper '%s %s %s', rc = %d\n", |
361 | argv[0], argv[1], argv[2], rc); | |
d1ff2312 | 362 | |
96dded38 | 363 | return rc; |
d1ff2312 BB |
364 | } |
365 | #endif | |
366 | ||
51a727e9 BB |
367 | static int |
368 | __init spl_init(void) | |
57d1b188 | 369 | { |
370 | int rc = 0; | |
f23e92fa | 371 | |
57d1b188 | 372 | if ((rc = debug_init())) |
18c9eadf | 373 | return rc; |
f23e92fa | 374 | |
2fb9b26a | 375 | if ((rc = spl_kmem_init())) |
d28db80f | 376 | GOTO(out1, rc); |
8d0f1ee9 | 377 | |
9ab1ac14 | 378 | if ((rc = spl_mutex_init())) |
d28db80f | 379 | GOTO(out2, rc); |
9ab1ac14 | 380 | |
d28db80f | 381 | if ((rc = spl_rw_init())) |
9ab1ac14 | 382 | GOTO(out3, rc); |
8d0f1ee9 | 383 | |
d28db80f | 384 | if ((rc = spl_taskq_init())) |
9ab1ac14 | 385 | GOTO(out4, rc); |
af828292 | 386 | |
d28db80f | 387 | if ((rc = vn_init())) |
04a479f7 | 388 | GOTO(out5, rc); |
389 | ||
d28db80f | 390 | if ((rc = proc_init())) |
e9cb2b4f BB |
391 | GOTO(out6, rc); |
392 | ||
d28db80f BB |
393 | if ((rc = kstat_init())) |
394 | GOTO(out7, rc); | |
395 | ||
57d1b188 | 396 | if ((rc = set_hostid())) |
d28db80f | 397 | GOTO(out8, rc = -EADDRNOTAVAIL); |
f23e92fa | 398 | |
96dded38 | 399 | #ifndef HAVE_KALLSYMS_LOOKUP_NAME |
d1ff2312 | 400 | if ((rc = set_kallsyms_lookup_name())) |
d28db80f | 401 | GOTO(out8, rc = -EADDRNOTAVAIL); |
96dded38 BB |
402 | #endif /* HAVE_KALLSYMS_LOOKUP_NAME */ |
403 | ||
404 | if ((rc = spl_kmem_init_kallsyms_lookup())) | |
d28db80f | 405 | GOTO(out8, rc); |
d1ff2312 | 406 | |
0cbaeb11 | 407 | printk("SPL: Loaded Solaris Porting Layer v%s\n", SPL_META_VERSION); |
57d1b188 | 408 | RETURN(rc); |
d28db80f | 409 | out8: |
04a479f7 | 410 | kstat_fini(); |
d28db80f | 411 | out7: |
57d1b188 | 412 | proc_fini(); |
d28db80f | 413 | out6: |
57d1b188 | 414 | vn_fini(); |
d28db80f | 415 | out5: |
e9cb2b4f | 416 | spl_taskq_fini(); |
d28db80f BB |
417 | out4: |
418 | spl_rw_fini(); | |
9ab1ac14 | 419 | out3: |
420 | spl_mutex_fini(); | |
8d0f1ee9 | 421 | out2: |
2fb9b26a | 422 | spl_kmem_fini(); |
d28db80f | 423 | out1: |
57d1b188 | 424 | debug_fini(); |
8d0f1ee9 | 425 | |
57d1b188 | 426 | printk("SPL: Failed to Load Solaris Porting Layer v%s, " |
0cbaeb11 | 427 | "rc = %d\n", SPL_META_VERSION, rc); |
18c9eadf | 428 | return rc; |
70eadc19 | 429 | } |
430 | ||
51a727e9 BB |
431 | static void |
432 | spl_fini(void) | |
70eadc19 | 433 | { |
57d1b188 | 434 | ENTRY; |
435 | ||
0cbaeb11 | 436 | printk("SPL: Unloaded Solaris Porting Layer v%s\n", SPL_META_VERSION); |
04a479f7 | 437 | kstat_fini(); |
57d1b188 | 438 | proc_fini(); |
af828292 | 439 | vn_fini(); |
e9cb2b4f | 440 | spl_taskq_fini(); |
d28db80f | 441 | spl_rw_fini(); |
2fb9b26a | 442 | spl_mutex_fini(); |
443 | spl_kmem_fini(); | |
57d1b188 | 444 | debug_fini(); |
70eadc19 | 445 | } |
446 | ||
51a727e9 BB |
447 | /* Called when a dependent module is loaded */ |
448 | void | |
449 | spl_setup(void) | |
450 | { | |
82a358d9 BB |
451 | int rc; |
452 | ||
51a727e9 BB |
453 | /* |
454 | * At module load time the pwd is set to '/' on a Solaris system. | |
455 | * On a Linux system will be set to whatever directory the caller | |
456 | * was in when executing insmod/modprobe. | |
457 | */ | |
82a358d9 BB |
458 | rc = vn_set_pwd("/"); |
459 | if (rc) | |
460 | printk("SPL: Warning unable to set pwd to '/': %d\n", rc); | |
51a727e9 BB |
461 | } |
462 | EXPORT_SYMBOL(spl_setup); | |
463 | ||
464 | /* Called when a dependent module is unloaded */ | |
465 | void | |
466 | spl_cleanup(void) | |
467 | { | |
468 | } | |
469 | EXPORT_SYMBOL(spl_cleanup); | |
470 | ||
70eadc19 | 471 | module_init(spl_init); |
472 | module_exit(spl_fini); | |
473 | ||
474 | MODULE_AUTHOR("Lawrence Livermore National Labs"); | |
475 | MODULE_DESCRIPTION("Solaris Porting Layer"); | |
476 | MODULE_LICENSE("GPL"); |