]>
Commit | Line | Data |
---|---|---|
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> |
0d54dcb5 | 30 | #include <sys/kobj.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> |
9fe45dc1 | 35 | #include <sys/tsd.h> |
5c1967eb | 36 | #include <sys/zmod.h> |
8d0f1ee9 | 37 | #include <sys/debug.h> |
57d1b188 | 38 | #include <sys/proc.h> |
04a479f7 | 39 | #include <sys/kstat.h> |
691d2bd7 | 40 | #include <sys/utsname.h> |
d3126abe | 41 | #include <sys/file.h> |
f23e92fa | 42 | #include <linux/kmod.h> |
ae4c36ad | 43 | #include <linux/proc_compat.h> |
55abb092 | 44 | #include <spl-debug.h> |
f1b59d26 | 45 | |
b17edc10 BB |
46 | #ifdef SS_DEBUG_SUBSYS |
47 | #undef SS_DEBUG_SUBSYS | |
57d1b188 | 48 | #endif |
8d0f1ee9 | 49 | |
b17edc10 | 50 | #define SS_DEBUG_SUBSYS SS_GENERIC |
f23e92fa | 51 | |
0cbaeb11 | 52 | char spl_version[16] = "SPL v" SPL_META_VERSION; |
1a73940d | 53 | EXPORT_SYMBOL(spl_version); |
3561541c | 54 | |
0d54dcb5 | 55 | unsigned long spl_hostid = HW_INVALID_HOSTID; |
f23e92fa | 56 | EXPORT_SYMBOL(spl_hostid); |
fa6f7d8f DH |
57 | module_param(spl_hostid, ulong, 0644); |
58 | MODULE_PARM_DESC(spl_hostid, "The system hostid."); | |
8d0f1ee9 | 59 | |
99639e4a | 60 | char hw_serial[HW_HOSTID_LEN] = "<none>"; |
937879f1 | 61 | EXPORT_SYMBOL(hw_serial); |
f1b59d26 | 62 | |
ae4c36ad | 63 | proc_t p0 = { 0 }; |
f1b59d26 | 64 | EXPORT_SYMBOL(p0); |
70eadc19 | 65 | |
d1ff2312 | 66 | #ifndef HAVE_KALLSYMS_LOOKUP_NAME |
96dded38 | 67 | kallsyms_lookup_name_t spl_kallsyms_lookup_name_fn = SYMBOL_POISON; |
d1ff2312 BB |
68 | #endif |
69 | ||
77b1fe8f | 70 | int |
71 | highbit(unsigned long i) | |
72 | { | |
73 | register int h = 1; | |
b17edc10 | 74 | SENTRY; |
77b1fe8f | 75 | |
76 | if (i == 0) | |
b17edc10 | 77 | SRETURN(0); |
77b1fe8f | 78 | #if BITS_PER_LONG == 64 |
79 | if (i & 0xffffffff00000000ul) { | |
80 | h += 32; i >>= 32; | |
81 | } | |
82 | #endif | |
83 | if (i & 0xffff0000) { | |
84 | h += 16; i >>= 16; | |
85 | } | |
86 | if (i & 0xff00) { | |
87 | h += 8; i >>= 8; | |
88 | } | |
89 | if (i & 0xf0) { | |
90 | h += 4; i >>= 4; | |
91 | } | |
92 | if (i & 0xc) { | |
93 | h += 2; i >>= 2; | |
94 | } | |
95 | if (i & 0x2) { | |
96 | h += 1; | |
97 | } | |
b17edc10 | 98 | SRETURN(h); |
77b1fe8f | 99 | } |
100 | EXPORT_SYMBOL(highbit); | |
101 | ||
a4bfd8ea | 102 | #if BITS_PER_LONG == 32 |
b61a6e8b | 103 | /* |
a4bfd8ea BB |
104 | * Support 64/64 => 64 division on a 32-bit platform. While the kernel |
105 | * provides a div64_u64() function for this we do not use it because the | |
106 | * implementation is flawed. There are cases which return incorrect | |
107 | * results as late as linux-2.6.35. Until this is fixed upstream the | |
108 | * spl must provide its own implementation. | |
109 | * | |
110 | * This implementation is a slightly modified version of the algorithm | |
111 | * proposed by the book 'Hacker's Delight'. The original source can be | |
112 | * found here and is available for use without restriction. | |
113 | * | |
114 | * http://www.hackersdelight.org/HDcode/newCode/divDouble.c | |
115 | */ | |
116 | ||
117 | /* | |
118 | * Calculate number of leading of zeros for a 64-bit value. | |
119 | */ | |
120 | static int | |
121 | nlz64(uint64_t x) { | |
122 | register int n = 0; | |
123 | ||
124 | if (x == 0) | |
125 | return 64; | |
126 | ||
127 | if (x <= 0x00000000FFFFFFFFULL) {n = n + 32; x = x << 32;} | |
128 | if (x <= 0x0000FFFFFFFFFFFFULL) {n = n + 16; x = x << 16;} | |
129 | if (x <= 0x00FFFFFFFFFFFFFFULL) {n = n + 8; x = x << 8;} | |
130 | if (x <= 0x0FFFFFFFFFFFFFFFULL) {n = n + 4; x = x << 4;} | |
131 | if (x <= 0x3FFFFFFFFFFFFFFFULL) {n = n + 2; x = x << 2;} | |
132 | if (x <= 0x7FFFFFFFFFFFFFFFULL) {n = n + 1;} | |
133 | ||
134 | return n; | |
135 | } | |
136 | ||
137 | /* | |
138 | * Newer kernels have a div_u64() function but we define our own | |
139 | * to simplify portibility between kernel versions. | |
140 | */ | |
141 | static inline uint64_t | |
142 | __div_u64(uint64_t u, uint32_t v) | |
143 | { | |
144 | (void) do_div(u, v); | |
145 | return u; | |
146 | } | |
147 | ||
148 | /* | |
149 | * Implementation of 64-bit unsigned division for 32-bit machines. | |
150 | * | |
151 | * First the procedure takes care of the case in which the divisor is a | |
152 | * 32-bit quantity. There are two subcases: (1) If the left half of the | |
153 | * dividend is less than the divisor, one execution of do_div() is all that | |
154 | * is required (overflow is not possible). (2) Otherwise it does two | |
155 | * divisions, using the grade school method. | |
b61a6e8b | 156 | */ |
1b4ad25e | 157 | uint64_t |
a4bfd8ea | 158 | __udivdi3(uint64_t u, uint64_t v) |
b61a6e8b | 159 | { |
a4bfd8ea BB |
160 | uint64_t u0, u1, v1, q0, q1, k; |
161 | int n; | |
162 | ||
163 | if (v >> 32 == 0) { // If v < 2**32: | |
164 | if (u >> 32 < v) { // If u/v cannot overflow, | |
165 | return __div_u64(u, v); // just do one division. | |
166 | } else { // If u/v would overflow: | |
167 | u1 = u >> 32; // Break u into two halves. | |
168 | u0 = u & 0xFFFFFFFF; | |
169 | q1 = __div_u64(u1, v); // First quotient digit. | |
170 | k = u1 - q1 * v; // First remainder, < v. | |
171 | u0 += (k << 32); | |
172 | q0 = __div_u64(u0, v); // Seconds quotient digit. | |
173 | return (q1 << 32) + q0; | |
174 | } | |
175 | } else { // If v >= 2**32: | |
176 | n = nlz64(v); // 0 <= n <= 31. | |
177 | v1 = (v << n) >> 32; // Normalize divisor, MSB is 1. | |
178 | u1 = u >> 1; // To ensure no overflow. | |
179 | q1 = __div_u64(u1, v1); // Get quotient from | |
180 | q0 = (q1 << n) >> 31; // Undo normalization and | |
181 | // division of u by 2. | |
182 | if (q0 != 0) // Make q0 correct or | |
183 | q0 = q0 - 1; // too small by 1. | |
184 | if ((u - q0 * v) >= v) | |
185 | q0 = q0 + 1; // Now q0 is correct. | |
186 | ||
187 | return q0; | |
188 | } | |
550f1705 | 189 | } |
190 | EXPORT_SYMBOL(__udivdi3); | |
191 | ||
192 | /* | |
a4bfd8ea BB |
193 | * Implementation of 64-bit signed division for 32-bit machines. |
194 | */ | |
195 | int64_t | |
196 | __divdi3(int64_t u, int64_t v) | |
197 | { | |
198 | int64_t q, t; | |
199 | q = __udivdi3(abs64(u), abs64(v)); | |
200 | t = (u ^ v) >> 63; // If u, v have different | |
201 | return (q ^ t) - t; // signs, negate q. | |
202 | } | |
203 | EXPORT_SYMBOL(__divdi3); | |
204 | ||
205 | /* | |
206 | * Implementation of 64-bit unsigned modulo for 32-bit machines. | |
550f1705 | 207 | */ |
1b4ad25e AZ |
208 | uint64_t |
209 | __umoddi3(uint64_t dividend, uint64_t divisor) | |
550f1705 | 210 | { |
1b4ad25e | 211 | return (dividend - (divisor * __udivdi3(dividend, divisor))); |
b61a6e8b | 212 | } |
550f1705 | 213 | EXPORT_SYMBOL(__umoddi3); |
a4bfd8ea | 214 | |
96dded38 | 215 | #endif /* BITS_PER_LONG */ |
b61a6e8b | 216 | |
b871b8cd BB |
217 | /* NOTE: The strtoxx behavior is solely based on my reading of the Solaris |
218 | * ddi_strtol(9F) man page. I have not verified the behavior of these | |
219 | * functions against their Solaris counterparts. It is possible that I | |
96dded38 | 220 | * may have misinterpreted the man page or the man page is incorrect. |
b871b8cd | 221 | */ |
2ee63a54 BB |
222 | int ddi_strtoul(const char *, char **, int, unsigned long *); |
223 | int ddi_strtol(const char *, char **, int, long *); | |
224 | int ddi_strtoull(const char *, char **, int, unsigned long long *); | |
225 | int ddi_strtoll(const char *, char **, int, long long *); | |
226 | ||
227 | #define define_ddi_strtoux(type, valtype) \ | |
228 | int ddi_strtou##type(const char *str, char **endptr, \ | |
b871b8cd | 229 | int base, valtype *result) \ |
2ee63a54 | 230 | { \ |
b871b8cd BB |
231 | valtype last_value, value = 0; \ |
232 | char *ptr = (char *)str; \ | |
233 | int flag = 1, digit; \ | |
234 | \ | |
235 | if (strlen(ptr) == 0) \ | |
236 | return EINVAL; \ | |
237 | \ | |
238 | /* Auto-detect base based on prefix */ \ | |
239 | if (!base) { \ | |
240 | if (str[0] == '0') { \ | |
241 | if (tolower(str[1])=='x' && isxdigit(str[2])) { \ | |
242 | base = 16; /* hex */ \ | |
243 | ptr += 2; \ | |
244 | } else if (str[1] >= '0' && str[1] < 8) { \ | |
245 | base = 8; /* octal */ \ | |
246 | ptr += 1; \ | |
247 | } else { \ | |
248 | return EINVAL; \ | |
249 | } \ | |
250 | } else { \ | |
251 | base = 10; /* decimal */ \ | |
252 | } \ | |
253 | } \ | |
254 | \ | |
255 | while (1) { \ | |
256 | if (isdigit(*ptr)) \ | |
257 | digit = *ptr - '0'; \ | |
258 | else if (isalpha(*ptr)) \ | |
259 | digit = tolower(*ptr) - 'a' + 10; \ | |
260 | else \ | |
261 | break; \ | |
262 | \ | |
263 | if (digit >= base) \ | |
264 | break; \ | |
2ee63a54 | 265 | \ |
b871b8cd BB |
266 | last_value = value; \ |
267 | value = value * base + digit; \ | |
268 | if (last_value > value) /* Overflow */ \ | |
269 | return ERANGE; \ | |
2ee63a54 | 270 | \ |
b871b8cd BB |
271 | flag = 1; \ |
272 | ptr++; \ | |
2ee63a54 BB |
273 | } \ |
274 | \ | |
b871b8cd BB |
275 | if (flag) \ |
276 | *result = value; \ | |
277 | \ | |
278 | if (endptr) \ | |
279 | *endptr = (char *)(flag ? ptr : str); \ | |
280 | \ | |
281 | return 0; \ | |
2ee63a54 BB |
282 | } \ |
283 | ||
284 | #define define_ddi_strtox(type, valtype) \ | |
285 | int ddi_strto##type(const char *str, char **endptr, \ | |
286 | int base, valtype *result) \ | |
b871b8cd BB |
287 | { \ |
288 | int rc; \ | |
2ee63a54 BB |
289 | \ |
290 | if (*str == '-') { \ | |
b871b8cd BB |
291 | rc = ddi_strtou##type(str + 1, endptr, base, result); \ |
292 | if (!rc) { \ | |
293 | if (*endptr == str + 1) \ | |
294 | *endptr = (char *)str; \ | |
295 | else \ | |
296 | *result = -*result; \ | |
297 | } \ | |
2ee63a54 | 298 | } else { \ |
b871b8cd | 299 | rc = ddi_strtou##type(str, endptr, base, result); \ |
2ee63a54 BB |
300 | } \ |
301 | \ | |
b871b8cd BB |
302 | return rc; \ |
303 | } | |
2ee63a54 BB |
304 | |
305 | define_ddi_strtoux(l, unsigned long) | |
306 | define_ddi_strtox(l, long) | |
307 | define_ddi_strtoux(ll, unsigned long long) | |
308 | define_ddi_strtox(ll, long long) | |
309 | ||
2f5d55aa | 310 | EXPORT_SYMBOL(ddi_strtoul); |
2ee63a54 BB |
311 | EXPORT_SYMBOL(ddi_strtol); |
312 | EXPORT_SYMBOL(ddi_strtoll); | |
313 | EXPORT_SYMBOL(ddi_strtoull); | |
2f5d55aa | 314 | |
d3126abe BB |
315 | int |
316 | ddi_copyin(const void *from, void *to, size_t len, int flags) | |
317 | { | |
318 | /* Fake ioctl() issued by kernel, 'from' is a kernel address */ | |
319 | if (flags & FKIOCTL) { | |
320 | memcpy(to, from, len); | |
321 | return 0; | |
322 | } | |
323 | ||
324 | return copyin(from, to, len); | |
325 | } | |
326 | EXPORT_SYMBOL(ddi_copyin); | |
327 | ||
328 | int | |
329 | ddi_copyout(const void *from, void *to, size_t len, int flags) | |
330 | { | |
331 | /* Fake ioctl() issued by kernel, 'from' is a kernel address */ | |
332 | if (flags & FKIOCTL) { | |
333 | memcpy(to, from, len); | |
334 | return 0; | |
335 | } | |
336 | ||
337 | return copyout(from, to, len); | |
338 | } | |
339 | EXPORT_SYMBOL(ddi_copyout); | |
340 | ||
e811949a BB |
341 | #ifndef HAVE_PUT_TASK_STRUCT |
342 | /* | |
343 | * This is only a stub function which should never be used. The SPL should | |
344 | * never be putting away the last reference on a task structure so this will | |
345 | * not be called. However, we still need to define it so the module does not | |
346 | * have undefined symbol at load time. That all said if this impossible | |
55abb092 | 347 | * thing does somehow happen PANIC immediately so we know about it. |
e811949a BB |
348 | */ |
349 | void | |
350 | __put_task_struct(struct task_struct *t) | |
351 | { | |
55abb092 | 352 | PANIC("Unexpectly put last reference on task %d\n", (int)t->pid); |
e811949a BB |
353 | } |
354 | EXPORT_SYMBOL(__put_task_struct); | |
355 | #endif /* HAVE_PUT_TASK_STRUCT */ | |
356 | ||
691d2bd7 | 357 | struct new_utsname *__utsname(void) |
358 | { | |
3d061e9d | 359 | #ifdef HAVE_INIT_UTSNAME |
691d2bd7 | 360 | return init_utsname(); |
3d061e9d | 361 | #else |
362 | return &system_utsname; | |
363 | #endif | |
691d2bd7 | 364 | } |
365 | EXPORT_SYMBOL(__utsname); | |
366 | ||
0d54dcb5 DH |
367 | |
368 | /* | |
369 | * Read the unique system identifier from the /etc/hostid file. | |
370 | * | |
371 | * The behavior of /usr/bin/hostid on Linux systems with the | |
372 | * regular eglibc and coreutils is: | |
373 | * | |
374 | * 1. Generate the value if the /etc/hostid file does not exist | |
375 | * or if the /etc/hostid file is less than four bytes in size. | |
376 | * | |
377 | * 2. If the /etc/hostid file is at least 4 bytes, then return | |
378 | * the first four bytes [0..3] in native endian order. | |
379 | * | |
380 | * 3. Always ignore bytes [4..] if they exist in the file. | |
381 | * | |
382 | * Only the first four bytes are significant, even on systems that | |
383 | * have a 64-bit word size. | |
384 | * | |
385 | * See: | |
386 | * | |
387 | * eglibc: sysdeps/unix/sysv/linux/gethostid.c | |
388 | * coreutils: src/hostid.c | |
389 | * | |
390 | * Notes: | |
391 | * | |
392 | * The /etc/hostid file on Solaris is a text file that often reads: | |
393 | * | |
394 | * # DO NOT EDIT | |
395 | * "0123456789" | |
396 | * | |
397 | * Directly copying this file to Linux results in a constant | |
398 | * hostid of 4f442023 because the default comment constitutes | |
399 | * the first four bytes of the file. | |
400 | * | |
401 | */ | |
402 | ||
403 | char *spl_hostid_path = HW_HOSTID_PATH; | |
404 | module_param(spl_hostid_path, charp, 0444); | |
405 | MODULE_PARM_DESC(spl_hostid_path, "The system hostid file (/etc/hostid)"); | |
406 | ||
407 | static int | |
408 | hostid_read(void) | |
409 | { | |
410 | int result; | |
411 | uint64_t size; | |
412 | struct _buf *file; | |
413 | unsigned long hostid = 0; | |
414 | ||
415 | file = kobj_open_file(spl_hostid_path); | |
416 | ||
6b3b569d | 417 | if (file == (struct _buf *)-1) |
0d54dcb5 | 418 | return -1; |
0d54dcb5 DH |
419 | |
420 | result = kobj_get_filesize(file, &size); | |
421 | ||
422 | if (result != 0) { | |
423 | printk(KERN_WARNING | |
424 | "SPL: kobj_get_filesize returned %i on %s\n", | |
425 | result, spl_hostid_path); | |
426 | kobj_close_file(file); | |
427 | return -2; | |
428 | } | |
429 | ||
430 | if (size < sizeof(HW_HOSTID_MASK)) { | |
431 | printk(KERN_WARNING | |
432 | "SPL: Ignoring the %s file because it is %llu bytes; " | |
433 | "expecting %lu bytes instead.\n", | |
434 | spl_hostid_path, size, sizeof(HW_HOSTID_MASK)); | |
435 | kobj_close_file(file); | |
436 | return -3; | |
437 | } | |
438 | ||
439 | /* Read directly into the variable like eglibc does. */ | |
440 | /* Short reads are okay; native behavior is preserved. */ | |
441 | result = kobj_read_file(file, (char *)&hostid, sizeof(hostid), 0); | |
442 | ||
443 | if (result < 0) { | |
444 | printk(KERN_WARNING | |
445 | "SPL: kobj_read_file returned %i on %s\n", | |
446 | result, spl_hostid_path); | |
447 | kobj_close_file(file); | |
448 | return -4; | |
449 | } | |
450 | ||
451 | /* Mask down to 32 bits like coreutils does. */ | |
452 | spl_hostid = hostid & HW_HOSTID_MASK; | |
453 | kobj_close_file(file); | |
454 | return 0; | |
455 | } | |
456 | ||
fa6f7d8f DH |
457 | #define GET_HOSTID_CMD \ |
458 | "exec 0</dev/null " \ | |
459 | " 1>/proc/sys/kernel/spl/hostid " \ | |
460 | " 2>/dev/null; " \ | |
461 | "hostid" | |
462 | ||
8d0f1ee9 | 463 | static int |
0d54dcb5 | 464 | hostid_exec(void) |
8d0f1ee9 | 465 | { |
fa6f7d8f | 466 | char *argv[] = { "/bin/sh", |
f23e92fa | 467 | "-c", |
fa6f7d8f | 468 | GET_HOSTID_CMD, |
f23e92fa | 469 | NULL }; |
470 | char *envp[] = { "HOME=/", | |
471 | "TERM=linux", | |
472 | "PATH=/sbin:/usr/sbin:/bin:/usr/bin", | |
473 | NULL }; | |
96dded38 | 474 | int rc; |
8d0f1ee9 | 475 | |
57d1b188 | 476 | /* Doing address resolution in the kernel is tricky and just |
937879f1 | 477 | * not a good idea in general. So to set the proper 'hw_serial' |
57d1b188 | 478 | * use the usermodehelper support to ask '/bin/sh' to run |
479 | * '/usr/bin/hostid' and redirect the result to /proc/sys/spl/hostid | |
96dded38 | 480 | * for us to use. It's a horrific solution but it will do for now. |
57d1b188 | 481 | */ |
fa6f7d8f | 482 | rc = call_usermodehelper(argv[0], argv, envp, 1); |
96dded38 BB |
483 | if (rc) |
484 | printk("SPL: Failed user helper '%s %s %s', rc = %d\n", | |
485 | argv[0], argv[1], argv[2], rc); | |
486 | ||
487 | return rc; | |
57d1b188 | 488 | } |
8d0f1ee9 | 489 | |
99639e4a BB |
490 | uint32_t |
491 | zone_get_hostid(void *zone) | |
492 | { | |
493 | unsigned long hostid; | |
494 | ||
495 | /* Only the global zone is supported */ | |
496 | ASSERT(zone == NULL); | |
497 | ||
498 | if (ddi_strtoul(hw_serial, NULL, HW_HOSTID_LEN-1, &hostid) != 0) | |
499 | return HW_INVALID_HOSTID; | |
500 | ||
501 | return (uint32_t)hostid; | |
502 | } | |
503 | EXPORT_SYMBOL(zone_get_hostid); | |
504 | ||
96dded38 | 505 | #ifndef HAVE_KALLSYMS_LOOKUP_NAME |
d1ff2312 | 506 | /* |
ad35b6a6 DH |
507 | * The kallsyms_lookup_name() kernel function is not an exported symbol in |
508 | * Linux 2.6.19 through 2.6.32 inclusive. | |
509 | * | |
510 | * This function replaces the functionality by performing an upcall to user | |
511 | * space where /proc/kallsyms is consulted for the requested address. | |
512 | * | |
d1ff2312 | 513 | */ |
ad35b6a6 DH |
514 | |
515 | #define GET_KALLSYMS_ADDR_CMD \ | |
516 | "exec 0</dev/null " \ | |
517 | " 1>/proc/sys/kernel/spl/kallsyms_lookup_name " \ | |
518 | " 2>/dev/null; " \ | |
519 | "awk '{ if ( $3 == \"kallsyms_lookup_name\" ) { print $1 } }' " \ | |
520 | " /proc/kallsyms " | |
d1ff2312 BB |
521 | |
522 | static int | |
523 | set_kallsyms_lookup_name(void) | |
524 | { | |
ad35b6a6 | 525 | char *argv[] = { "/bin/sh", |
d1ff2312 BB |
526 | "-c", |
527 | GET_KALLSYMS_ADDR_CMD, | |
528 | NULL }; | |
529 | char *envp[] = { "HOME=/", | |
530 | "TERM=linux", | |
531 | "PATH=/sbin:/usr/sbin:/bin:/usr/bin", | |
532 | NULL }; | |
533 | int rc; | |
534 | ||
ad35b6a6 | 535 | rc = call_usermodehelper(argv[0], argv, envp, 1); |
d1ff2312 | 536 | if (rc) |
96dded38 BB |
537 | printk("SPL: Failed user helper '%s %s %s', rc = %d\n", |
538 | argv[0], argv[1], argv[2], rc); | |
d1ff2312 | 539 | |
96dded38 | 540 | return rc; |
d1ff2312 BB |
541 | } |
542 | #endif | |
543 | ||
51a727e9 BB |
544 | static int |
545 | __init spl_init(void) | |
57d1b188 | 546 | { |
547 | int rc = 0; | |
f23e92fa | 548 | |
57d1b188 | 549 | if ((rc = debug_init())) |
18c9eadf | 550 | return rc; |
f23e92fa | 551 | |
2fb9b26a | 552 | if ((rc = spl_kmem_init())) |
b17edc10 | 553 | SGOTO(out1, rc); |
8d0f1ee9 | 554 | |
9ab1ac14 | 555 | if ((rc = spl_mutex_init())) |
b17edc10 | 556 | SGOTO(out2, rc); |
9ab1ac14 | 557 | |
d28db80f | 558 | if ((rc = spl_rw_init())) |
b17edc10 | 559 | SGOTO(out3, rc); |
8d0f1ee9 | 560 | |
d28db80f | 561 | if ((rc = spl_taskq_init())) |
b17edc10 | 562 | SGOTO(out4, rc); |
af828292 | 563 | |
12ff95ff | 564 | if ((rc = spl_vn_init())) |
b17edc10 | 565 | SGOTO(out5, rc); |
04a479f7 | 566 | |
d28db80f | 567 | if ((rc = proc_init())) |
b17edc10 | 568 | SGOTO(out6, rc); |
e9cb2b4f | 569 | |
d28db80f | 570 | if ((rc = kstat_init())) |
b17edc10 | 571 | SGOTO(out7, rc); |
d28db80f | 572 | |
9fe45dc1 BB |
573 | if ((rc = tsd_init())) |
574 | SGOTO(out8, rc); | |
575 | ||
5c1967eb BB |
576 | if ((rc = zlib_init())) |
577 | SGOTO(out9, rc); | |
578 | ||
0d54dcb5 DH |
579 | /* |
580 | * Get the hostid if it was not passed as a module parameter. Try | |
581 | * reading the /etc/hostid file directly, and then fall back to calling | |
582 | * the /usr/bin/hostid utility. | |
583 | */ | |
584 | ||
585 | if (spl_hostid == HW_INVALID_HOSTID | |
586 | && (rc = hostid_read()) && (rc = hostid_exec())) | |
5c1967eb | 587 | SGOTO(out10, rc = -EADDRNOTAVAIL); |
f23e92fa | 588 | |
96dded38 | 589 | #ifndef HAVE_KALLSYMS_LOOKUP_NAME |
d1ff2312 | 590 | if ((rc = set_kallsyms_lookup_name())) |
5c1967eb | 591 | SGOTO(out10, rc = -EADDRNOTAVAIL); |
96dded38 BB |
592 | #endif /* HAVE_KALLSYMS_LOOKUP_NAME */ |
593 | ||
594 | if ((rc = spl_kmem_init_kallsyms_lookup())) | |
5c1967eb | 595 | SGOTO(out10, rc); |
d1ff2312 | 596 | |
12ff95ff BB |
597 | if ((rc = spl_vn_init_kallsyms_lookup())) |
598 | SGOTO(out10, rc); | |
599 | ||
5b8f76ea DH |
600 | printk(KERN_NOTICE "SPL: Loaded module v%s%s, using hostid 0x%08x\n", |
601 | SPL_META_VERSION, SPL_DEBUG_STR, (unsigned int) spl_hostid); | |
b17edc10 | 602 | SRETURN(rc); |
5c1967eb BB |
603 | out10: |
604 | zlib_fini(); | |
9fe45dc1 BB |
605 | out9: |
606 | tsd_fini(); | |
d28db80f | 607 | out8: |
04a479f7 | 608 | kstat_fini(); |
d28db80f | 609 | out7: |
57d1b188 | 610 | proc_fini(); |
d28db80f | 611 | out6: |
12ff95ff | 612 | spl_vn_fini(); |
d28db80f | 613 | out5: |
e9cb2b4f | 614 | spl_taskq_fini(); |
d28db80f BB |
615 | out4: |
616 | spl_rw_fini(); | |
9ab1ac14 | 617 | out3: |
618 | spl_mutex_fini(); | |
8d0f1ee9 | 619 | out2: |
2fb9b26a | 620 | spl_kmem_fini(); |
d28db80f | 621 | out1: |
57d1b188 | 622 | debug_fini(); |
8d0f1ee9 | 623 | |
81672c01 RC |
624 | printk(KERN_NOTICE "SPL: Failed to Load Solaris Porting Layer v%s%s" |
625 | ", rc = %d\n", SPL_META_VERSION, SPL_DEBUG_STR, rc); | |
18c9eadf | 626 | return rc; |
70eadc19 | 627 | } |
628 | ||
51a727e9 BB |
629 | static void |
630 | spl_fini(void) | |
70eadc19 | 631 | { |
b17edc10 | 632 | SENTRY; |
57d1b188 | 633 | |
5b8f76ea | 634 | printk(KERN_NOTICE "SPL: Unloaded module v%s%s\n", |
81672c01 | 635 | SPL_META_VERSION, SPL_DEBUG_STR); |
5c1967eb | 636 | zlib_fini(); |
9fe45dc1 | 637 | tsd_fini(); |
04a479f7 | 638 | kstat_fini(); |
57d1b188 | 639 | proc_fini(); |
12ff95ff | 640 | spl_vn_fini(); |
e9cb2b4f | 641 | spl_taskq_fini(); |
d28db80f | 642 | spl_rw_fini(); |
2fb9b26a | 643 | spl_mutex_fini(); |
644 | spl_kmem_fini(); | |
57d1b188 | 645 | debug_fini(); |
70eadc19 | 646 | } |
647 | ||
51a727e9 BB |
648 | /* Called when a dependent module is loaded */ |
649 | void | |
650 | spl_setup(void) | |
651 | { | |
82a358d9 BB |
652 | int rc; |
653 | ||
51a727e9 BB |
654 | /* |
655 | * At module load time the pwd is set to '/' on a Solaris system. | |
656 | * On a Linux system will be set to whatever directory the caller | |
657 | * was in when executing insmod/modprobe. | |
658 | */ | |
82a358d9 BB |
659 | rc = vn_set_pwd("/"); |
660 | if (rc) | |
661 | printk("SPL: Warning unable to set pwd to '/': %d\n", rc); | |
51a727e9 BB |
662 | } |
663 | EXPORT_SYMBOL(spl_setup); | |
664 | ||
665 | /* Called when a dependent module is unloaded */ | |
666 | void | |
667 | spl_cleanup(void) | |
668 | { | |
669 | } | |
670 | EXPORT_SYMBOL(spl_cleanup); | |
671 | ||
70eadc19 | 672 | module_init(spl_init); |
673 | module_exit(spl_fini); | |
674 | ||
675 | MODULE_AUTHOR("Lawrence Livermore National Labs"); | |
676 | MODULE_DESCRIPTION("Solaris Porting Layer"); | |
677 | MODULE_LICENSE("GPL"); |