1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (C) 2004 Cluster File Systems, Inc.
5 * Author: Nikita Danilov <nikita@clusterfs.com>
7 * This file is part of Lustre, http://www.lustre.org.
9 * Lustre is free software; you can redistribute it and/or modify it under the
10 * terms of version 2 of the GNU General Public License as published by the
11 * Free Software Foundation.
13 * Lustre is distributed in the hope that it will be useful, but WITHOUT ANY
14 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
15 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
18 * You should have received a copy of the GNU General Public License along
19 * with Lustre; if not, write to the Free Software Foundation, Inc., 675 Mass
20 * Ave, Cambridge, MA 02139, USA.
22 * Implementation of portable APIs for user-level.
26 /* Implementations of portable APIs for liblustre */
29 * liblustre is single-threaded, so most "synchronization" APIs are trivial.
34 #include <libcfs/libcfs.h>
35 #include <libcfs/kp30.h>
40 #ifdef HAVE_ASM_PAGE_H
43 #ifdef HAVE_SYS_USER_H
47 #include <sys/types.h>
59 * Sleep channel. No-op implementation.
62 void cfs_waitq_init(struct cfs_waitq *waitq)
64 LASSERT(waitq != NULL);
68 void cfs_waitlink_init(struct cfs_waitlink *link)
70 LASSERT(link != NULL);
74 void cfs_waitq_add(struct cfs_waitq *waitq, struct cfs_waitlink *link)
76 LASSERT(waitq != NULL);
77 LASSERT(link != NULL);
82 void cfs_waitq_add_exclusive(struct cfs_waitq *waitq, struct cfs_waitlink *link)
84 LASSERT(waitq != NULL);
85 LASSERT(link != NULL);
90 void cfs_waitq_forward(struct cfs_waitlink *link, struct cfs_waitq *waitq)
92 LASSERT(waitq != NULL);
93 LASSERT(link != NULL);
98 void cfs_waitq_del(struct cfs_waitq *waitq, struct cfs_waitlink *link)
100 LASSERT(waitq != NULL);
101 LASSERT(link != NULL);
106 int cfs_waitq_active(struct cfs_waitq *waitq)
108 LASSERT(waitq != NULL);
113 void cfs_waitq_signal(struct cfs_waitq *waitq)
115 LASSERT(waitq != NULL);
119 void cfs_waitq_signal_nr(struct cfs_waitq *waitq, int nr)
121 LASSERT(waitq != NULL);
125 void cfs_waitq_broadcast(struct cfs_waitq *waitq)
127 LASSERT(waitq != NULL);
131 void cfs_waitq_wait(struct cfs_waitlink *link, int state)
133 LASSERT(link != NULL);
137 int64_t cfs_waitq_timedwait(struct cfs_waitlink *link, int state, int64_t timeout)
139 LASSERT(link != NULL);
144 #ifdef HAVE_LIBPTHREAD
150 struct lustre_thread_arg {
154 static void *cfs_thread_helper(void *data)
156 struct lustre_thread_arg *targ = data;
157 cfs_thread_t f = targ->f;
158 void *arg = targ->arg;
165 int cfs_create_thread(cfs_thread_t func, void *arg)
168 pthread_attr_t tattr;
170 struct lustre_thread_arg *targ_p = malloc(sizeof(struct lustre_thread_arg));
172 if ( targ_p == NULL )
178 pthread_attr_init(&tattr);
179 pthread_attr_setdetachstate(&tattr, PTHREAD_CREATE_DETACHED);
180 rc = pthread_create(&tid, &tattr, cfs_thread_helper, targ_p);
181 pthread_attr_destroy(&tattr);
186 uid_t cfs_curproc_uid(void)
191 int cfs_parse_int_tunable(int *value, char *name)
193 char *env = getenv(name);
199 *value = strtoull(env, &end, 0);
203 CERROR("Can't parse tunable %s=%s\n", name, env);
211 cfs_page_t *cfs_alloc_page(unsigned int flags)
213 cfs_page_t *pg = malloc(sizeof(*pg));
217 pg->addr = malloc(CFS_PAGE_SIZE);
226 void cfs_free_page(cfs_page_t *pg)
232 void *cfs_page_address(cfs_page_t *pg)
237 void *cfs_kmap(cfs_page_t *pg)
242 void cfs_kunmap(cfs_page_t *pg)
251 cfs_mem_cache_create(const char *name, size_t objsize, size_t off, unsigned long flags)
255 c = malloc(sizeof(*c));
259 CDEBUG(D_MALLOC, "alloc slab cache %s at %p, objsize %d\n",
260 name, c, (int)objsize);
264 int cfs_mem_cache_destroy(cfs_mem_cache_t *c)
266 CDEBUG(D_MALLOC, "destroy slab cache %p, objsize %u\n", c, c->size);
271 void *cfs_mem_cache_alloc(cfs_mem_cache_t *c, int gfp)
273 return cfs_alloc(c->size, gfp);
276 void cfs_mem_cache_free(cfs_mem_cache_t *c, void *addr)
281 void cfs_enter_debugger(void)
288 void cfs_daemonize(char *str)
293 cfs_sigset_t cfs_block_allsigs(void)
300 rc = sigprocmask(SIG_SETMASK, &all, &old);
306 cfs_sigset_t cfs_block_sigs(cfs_sigset_t blocks)
311 rc = sigprocmask(SIG_SETMASK, &blocks, &old);
317 void cfs_restore_sigs(cfs_sigset_t old)
319 int rc = sigprocmask(SIG_SETMASK, &old, NULL);
324 int cfs_signal_pending(void)
330 rc = sigpending(&set);
335 return !memcmp(&empty, &set, sizeof(set));
338 void cfs_clear_sigpending(void)
346 * In glibc (NOT in Linux, so check above is not right), implement
347 * stack-back-tracing through backtrace() function.
349 #include <execinfo.h>
351 void cfs_stack_trace_fill(struct cfs_stack_trace *trace)
353 backtrace(trace->frame, sizeof_array(trace->frame));
356 void *cfs_stack_trace_frame(struct cfs_stack_trace *trace, int frame_no)
358 if (0 <= frame_no && frame_no < sizeof_array(trace->frame))
359 return trace->frame[frame_no];
366 void cfs_stack_trace_fill(struct cfs_stack_trace *trace)
368 void *cfs_stack_trace_frame(struct cfs_stack_trace *trace, int frame_no)
376 void lbug_with_loc(char *file, const char *func, const int line)
378 /* No libcfs_catastrophe in userspace! */
379 libcfs_debug_msg(NULL, 0, D_EMERG, file, func, line, "LBUG\n");
388 * c-indentation-style: "K&R"