+++ /dev/null
-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
- * Copyright (C) 2004 Cluster File Systems, Inc.
- * Author: Nikita Danilov <nikita@clusterfs.com>
- *
- * This file is part of Lustre, http://www.lustre.org.
- *
- * Lustre is free software; you can redistribute it and/or modify it under the
- * terms of version 2 of the GNU General Public License as published by the
- * Free Software Foundation.
- *
- * Lustre is distributed in the hope that it will be useful, but WITHOUT ANY
- * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
- * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
- * details.
- *
- * You should have received a copy of the GNU General Public License along
- * with Lustre; if not, write to the Free Software Foundation, Inc., 675 Mass
- * Ave, Cambridge, MA 02139, USA.
- *
- * Implementation of portable APIs for user-level.
- *
- */
-
-/* Implementations of portable APIs for liblustre */
-
-/*
- * liblustre is single-threaded, so most "synchronization" APIs are trivial.
- */
-
-#ifndef __KERNEL__
-
-#include <libcfs/libcfs.h>
-#include <libcfs/kp30.h>
-
-#include <sys/mman.h>
-#ifndef __CYGWIN__
-#include <stdint.h>
-#ifdef HAVE_ASM_PAGE_H
-#include <asm/page.h>
-#endif
-#ifdef HAVE_SYS_USER_H
-#include <sys/user.h>
-#endif
-#else
-#include <sys/types.h>
-#endif
-#include <stdlib.h>
-#include <string.h>
-#include <signal.h>
-#include <errno.h>
-#include <sys/stat.h>
-#ifdef HAVE_SYS_VFS_H
-#include <sys/vfs.h>
-#endif
-
-/*
- * Sleep channel. No-op implementation.
- */
-
-void cfs_waitq_init(struct cfs_waitq *waitq)
-{
- LASSERT(waitq != NULL);
- (void)waitq;
-}
-
-void cfs_waitlink_init(struct cfs_waitlink *link)
-{
- LASSERT(link != NULL);
- (void)link;
-}
-
-void cfs_waitq_add(struct cfs_waitq *waitq, struct cfs_waitlink *link)
-{
- LASSERT(waitq != NULL);
- LASSERT(link != NULL);
- (void)waitq;
- (void)link;
-}
-
-void cfs_waitq_add_exclusive(struct cfs_waitq *waitq, struct cfs_waitlink *link)
-{
- LASSERT(waitq != NULL);
- LASSERT(link != NULL);
- (void)waitq;
- (void)link;
-}
-
-void cfs_waitq_forward(struct cfs_waitlink *link, struct cfs_waitq *waitq)
-{
- LASSERT(waitq != NULL);
- LASSERT(link != NULL);
- (void)waitq;
- (void)link;
-}
-
-void cfs_waitq_del(struct cfs_waitq *waitq, struct cfs_waitlink *link)
-{
- LASSERT(waitq != NULL);
- LASSERT(link != NULL);
- (void)waitq;
- (void)link;
-}
-
-int cfs_waitq_active(struct cfs_waitq *waitq)
-{
- LASSERT(waitq != NULL);
- (void)waitq;
- return 0;
-}
-
-void cfs_waitq_signal(struct cfs_waitq *waitq)
-{
- LASSERT(waitq != NULL);
- (void)waitq;
-}
-
-void cfs_waitq_signal_nr(struct cfs_waitq *waitq, int nr)
-{
- LASSERT(waitq != NULL);
- (void)waitq;
-}
-
-void cfs_waitq_broadcast(struct cfs_waitq *waitq)
-{
- LASSERT(waitq != NULL);
- (void)waitq;
-}
-
-void cfs_waitq_wait(struct cfs_waitlink *link, int state)
-{
- LASSERT(link != NULL);
- (void)link;
-}
-
-int64_t cfs_waitq_timedwait(struct cfs_waitlink *link, int state, int64_t timeout)
-{
- LASSERT(link != NULL);
- (void)link;
- return 0;
-}
-
-#ifdef HAVE_LIBPTHREAD
-
-/*
- * Threads
- */
-
-struct lustre_thread_arg {
- cfs_thread_t f;
- void *arg;
-};
-static void *cfs_thread_helper(void *data)
-{
- struct lustre_thread_arg *targ = data;
- cfs_thread_t f = targ->f;
- void *arg = targ->arg;
-
- free(targ);
-
- (void)f(arg);
- return NULL;
-}
-int cfs_create_thread(cfs_thread_t func, void *arg)
-{
- pthread_t tid;
- pthread_attr_t tattr;
- int rc;
- struct lustre_thread_arg *targ_p = malloc(sizeof(struct lustre_thread_arg));
-
- if ( targ_p == NULL )
- return -ENOMEM;
-
- targ_p->f = func;
- targ_p->arg = arg;
-
- pthread_attr_init(&tattr);
- pthread_attr_setdetachstate(&tattr, PTHREAD_CREATE_DETACHED);
- rc = pthread_create(&tid, &tattr, cfs_thread_helper, targ_p);
- pthread_attr_destroy(&tattr);
- return -rc;
-}
-#endif
-
-uid_t cfs_curproc_uid(void)
-{
- return getuid();
-}
-
-int cfs_parse_int_tunable(int *value, char *name)
-{
- char *env = getenv(name);
- char *end;
-
- if (env == NULL)
- return 0;
-
- *value = strtoull(env, &end, 0);
- if (*end == 0)
- return 0;
-
- CERROR("Can't parse tunable %s=%s\n", name, env);
- return -EINVAL;
-}
-
-/*
- * Allocator
- */
-
-cfs_page_t *cfs_alloc_page(unsigned int flags)
-{
- cfs_page_t *pg = malloc(sizeof(*pg));
-
- if (!pg)
- return NULL;
- pg->addr = malloc(CFS_PAGE_SIZE);
-
- if (!pg->addr) {
- free(pg);
- return NULL;
- }
- return pg;
-}
-
-void cfs_free_page(cfs_page_t *pg)
-{
- free(pg->addr);
- free(pg);
-}
-
-void *cfs_page_address(cfs_page_t *pg)
-{
- return pg->addr;
-}
-
-void *cfs_kmap(cfs_page_t *pg)
-{
- return pg->addr;
-}
-
-void cfs_kunmap(cfs_page_t *pg)
-{
-}
-
-/*
- * SLAB allocator
- */
-
-cfs_mem_cache_t *
-cfs_mem_cache_create(const char *name, size_t objsize, size_t off, unsigned long flags)
-{
- cfs_mem_cache_t *c;
-
- c = malloc(sizeof(*c));
- if (!c)
- return NULL;
- c->size = objsize;
- CDEBUG(D_MALLOC, "alloc slab cache %s at %p, objsize %d\n",
- name, c, (int)objsize);
- return c;
-}
-
-int cfs_mem_cache_destroy(cfs_mem_cache_t *c)
-{
- CDEBUG(D_MALLOC, "destroy slab cache %p, objsize %u\n", c, c->size);
- free(c);
- return 0;
-}
-
-void *cfs_mem_cache_alloc(cfs_mem_cache_t *c, int gfp)
-{
- return cfs_alloc(c->size, gfp);
-}
-
-void cfs_mem_cache_free(cfs_mem_cache_t *c, void *addr)
-{
- cfs_free(addr);
-}
-
-void cfs_enter_debugger(void)
-{
- /*
- * nothing for now.
- */
-}
-
-void cfs_daemonize(char *str)
-{
- return;
-}
-
-int cfs_daemonize_ctxt(char *str)
-{
- return 0;
-}
-
-cfs_sigset_t cfs_block_allsigs(void)
-{
- cfs_sigset_t all;
- cfs_sigset_t old;
- int rc;
-
- sigfillset(&all);
- rc = sigprocmask(SIG_SETMASK, &all, &old);
- LASSERT(rc == 0);
-
- return old;
-}
-
-cfs_sigset_t cfs_block_sigs(cfs_sigset_t blocks)
-{
- cfs_sigset_t old;
- int rc;
-
- rc = sigprocmask(SIG_SETMASK, &blocks, &old);
- LASSERT (rc == 0);
-
- return old;
-}
-
-void cfs_restore_sigs(cfs_sigset_t old)
-{
- int rc = sigprocmask(SIG_SETMASK, &old, NULL);
-
- LASSERT (rc == 0);
-}
-
-int cfs_signal_pending(void)
-{
- cfs_sigset_t empty;
- cfs_sigset_t set;
- int rc;
-
- rc = sigpending(&set);
- LASSERT (rc == 0);
-
- sigemptyset(&empty);
-
- return !memcmp(&empty, &set, sizeof(set));
-}
-
-void cfs_clear_sigpending(void)
-{
- return;
-}
-
-#ifdef __linux__
-
-/*
- * In glibc (NOT in Linux, so check above is not right), implement
- * stack-back-tracing through backtrace() function.
- */
-#include <execinfo.h>
-
-void cfs_stack_trace_fill(struct cfs_stack_trace *trace)
-{
- backtrace(trace->frame, sizeof_array(trace->frame));
-}
-
-void *cfs_stack_trace_frame(struct cfs_stack_trace *trace, int frame_no)
-{
- if (0 <= frame_no && frame_no < sizeof_array(trace->frame))
- return trace->frame[frame_no];
- else
- return NULL;
-}
-
-#else
-
-void cfs_stack_trace_fill(struct cfs_stack_trace *trace)
-{}
-void *cfs_stack_trace_frame(struct cfs_stack_trace *trace, int frame_no)
-{
- return NULL;
-}
-
-/* __linux__ */
-#endif
-
-void lbug_with_loc(char *file, const char *func, const int line)
-{
- /* No libcfs_catastrophe in userspace! */
- libcfs_debug_msg(NULL, 0, D_EMERG, file, func, line, "LBUG\n");
- abort();
-}
-
-/* !__KERNEL__ */
-#endif
-
-/*
- * Local variables:
- * c-indentation-style: "K&R"
- * c-basic-offset: 8
- * tab-width: 8
- * fill-column: 80
- * scroll-step: 1
- * End:
- */
git://git.whamcloud.com / fs / lustre-release.git / blobdiff