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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/>. | |
715f6251 | 10 | * |
716154c5 BB |
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. | |
15 | * | |
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) Thread Implementation. | |
25 | \*****************************************************************************/ | |
715f6251 | 26 | |
f4b37741 | 27 | #include <sys/thread.h> |
115aed0d | 28 | #include <sys/kmem.h> |
55abb092 | 29 | #include <spl-debug.h> |
f1ca4da6 | 30 | |
b17edc10 BB |
31 | #ifdef SS_DEBUG_SUBSYS |
32 | #undef SS_DEBUG_SUBSYS | |
937879f1 | 33 | #endif |
34 | ||
b17edc10 | 35 | #define SS_DEBUG_SUBSYS SS_THREAD |
937879f1 | 36 | |
f1ca4da6 | 37 | /* |
38 | * Thread interfaces | |
39 | */ | |
40 | typedef struct thread_priv_s { | |
41 | unsigned long tp_magic; /* Magic */ | |
a97df54e | 42 | int tp_name_size; /* Name size */ |
43 | char *tp_name; /* Name (without _thread suffix) */ | |
f1ca4da6 | 44 | void (*tp_func)(void *); /* Registered function */ |
45 | void *tp_args; /* Args to be passed to function */ | |
46 | size_t tp_len; /* Len to be passed to function */ | |
47 | int tp_state; /* State to start thread at */ | |
48 | pri_t tp_pri; /* Priority to start threat at */ | |
f1ca4da6 | 49 | } thread_priv_t; |
50 | ||
f1b59d26 | 51 | static int |
f1ca4da6 | 52 | thread_generic_wrapper(void *arg) |
53 | { | |
54 | thread_priv_t *tp = (thread_priv_t *)arg; | |
55 | void (*func)(void *); | |
56 | void *args; | |
f1ca4da6 | 57 | |
937879f1 | 58 | ASSERT(tp->tp_magic == TP_MAGIC); |
f1ca4da6 | 59 | func = tp->tp_func; |
60 | args = tp->tp_args; | |
f1ca4da6 | 61 | set_current_state(tp->tp_state); |
115aed0d | 62 | set_user_nice((kthread_t *)get_current(), PRIO_TO_NICE(tp->tp_pri)); |
a97df54e | 63 | kmem_free(tp->tp_name, tp->tp_name_size); |
64 | kmem_free(tp, sizeof(thread_priv_t)); | |
f1ca4da6 | 65 | |
f1ca4da6 | 66 | if (func) |
67 | func(args); | |
68 | ||
69 | return 0; | |
70 | } | |
71 | ||
72 | void | |
73 | __thread_exit(void) | |
74 | { | |
b17edc10 BB |
75 | SENTRY; |
76 | SEXIT; | |
3d061e9d | 77 | complete_and_exit(NULL, 0); |
937879f1 | 78 | /* Unreachable */ |
f1ca4da6 | 79 | } |
f1b59d26 | 80 | EXPORT_SYMBOL(__thread_exit); |
f1ca4da6 | 81 | |
82 | /* thread_create() may block forever if it cannot create a thread or | |
83 | * allocate memory. This is preferable to returning a NULL which Solaris | |
84 | * style callers likely never check for... since it can't fail. */ | |
85 | kthread_t * | |
51f443a0 | 86 | __thread_create(caddr_t stk, size_t stksize, thread_func_t func, |
ae4c36ad | 87 | const char *name, void *args, size_t len, proc_t *pp, |
968eccd1 | 88 | int state, pri_t pri) |
f1ca4da6 | 89 | { |
115aed0d | 90 | thread_priv_t *tp; |
968eccd1 | 91 | struct task_struct *tsk; |
a97df54e | 92 | char *p; |
b17edc10 | 93 | SENTRY; |
f1ca4da6 | 94 | |
95 | /* Option pp is simply ignored */ | |
96 | /* Variable stack size unsupported */ | |
937879f1 | 97 | ASSERT(stk == NULL); |
f1ca4da6 | 98 | |
115aed0d | 99 | tp = kmem_alloc(sizeof(thread_priv_t), KM_SLEEP); |
100 | if (tp == NULL) | |
b17edc10 | 101 | SRETURN(NULL); |
f1ca4da6 | 102 | |
115aed0d | 103 | tp->tp_magic = TP_MAGIC; |
a97df54e | 104 | tp->tp_name_size = strlen(name) + 1; |
105 | ||
106 | tp->tp_name = kmem_alloc(tp->tp_name_size, KM_SLEEP); | |
107 | if (tp->tp_name == NULL) { | |
108 | kmem_free(tp, sizeof(thread_priv_t)); | |
b17edc10 | 109 | SRETURN(NULL); |
a97df54e | 110 | } |
111 | ||
112 | strncpy(tp->tp_name, name, tp->tp_name_size); | |
113 | ||
114 | /* Strip trailing "_thread" from passed name which will be the func | |
115 | * name since the exposed API has no parameter for passing a name. | |
116 | */ | |
117 | p = strstr(tp->tp_name, "_thread"); | |
118 | if (p) | |
119 | p[0] = '\0'; | |
120 | ||
115aed0d | 121 | tp->tp_func = func; |
122 | tp->tp_args = args; | |
123 | tp->tp_len = len; | |
124 | tp->tp_state = state; | |
125 | tp->tp_pri = pri; | |
f1ca4da6 | 126 | |
d0bd694c BB |
127 | tsk = kthread_create(thread_generic_wrapper, (void *)tp, |
128 | "%s", tp->tp_name); | |
968eccd1 | 129 | if (IS_ERR(tsk)) { |
b17edc10 BB |
130 | SERROR("Failed to create thread: %ld\n", PTR_ERR(tsk)); |
131 | SRETURN(NULL); | |
968eccd1 | 132 | } |
133 | ||
134 | wake_up_process(tsk); | |
b17edc10 | 135 | SRETURN((kthread_t *)tsk); |
f1ca4da6 | 136 | } |
f1b59d26 | 137 | EXPORT_SYMBOL(__thread_create); |