-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
+/*
+ * GPL HEADER START
*
- * Copyright (C) 2004 Cluster File Systems, Inc.
- * Author: Nikita Danilov <nikita@clusterfs.com>
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
- * This file is part of Lustre, http://www.lustre.org.
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
*
- * 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.
+ * This program 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 version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
*
- * 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
+ * version 2 along with this program; If not, see
+ * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
*
- * 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.
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
*
- * Implementation of portable APIs for user-level.
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
*
+ * Copyright (c) 2011, Whamcloud, Inc.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ *
+ * libcfs/libcfs/user-prim.c
+ *
+ * Implementations of portable APIs for liblustre
+ *
+ * Author: Nikita Danilov <nikita@clusterfs.com>
*/
-
-/* Implementations of portable APIs for liblustre */
/*
* liblustre is single-threaded, so most "synchronization" APIs are trivial.
#ifndef __KERNEL__
-#include <libcfs/libcfs.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
+#include <libcfs/libcfs.h>
/*
- * Sleep channel. No-op implementation.
+ * Wait queue. No-op implementation.
*/
void cfs_waitq_init(struct cfs_waitq *waitq)
(void)link;
}
-void cfs_waitq_forward(struct cfs_waitlink *link, struct cfs_waitq *waitq)
+void cfs_waitq_add_exclusive_head(struct cfs_waitq *waitq, struct cfs_waitlink *link)
{
- LASSERT(waitq != NULL);
- LASSERT(link != NULL);
- (void)waitq;
- (void)link;
+ cfs_waitq_add_exclusive(waitq, link);
}
void cfs_waitq_del(struct cfs_waitq *waitq, struct cfs_waitlink *link)
(void)waitq;
}
-void cfs_waitq_wait(struct cfs_waitlink *link, int state)
+void cfs_waitq_wait(struct cfs_waitlink *link, cfs_task_state_t state)
{
LASSERT(link != NULL);
(void)link;
+
+ /* well, wait for something to happen */
+ cfs_call_wait_handler(0);
}
-int64_t cfs_waitq_timedwait(struct cfs_waitlink *link, int state, int64_t timeout)
+int64_t cfs_waitq_timedwait(struct cfs_waitlink *link, cfs_task_state_t state,
+ int64_t timeout)
{
LASSERT(link != NULL);
(void)link;
+ cfs_call_wait_handler(timeout);
return 0;
}
+void cfs_schedule_timeout_and_set_state(cfs_task_state_t state, int64_t timeout)
+{
+ cfs_waitlink_t l;
+ /* sleep(timeout) here instead? */
+ cfs_waitq_timedwait(&l, state, timeout);
+}
+
+void
+cfs_pause(cfs_duration_t d)
+{
+ struct timespec s;
+
+ cfs_duration_nsec(d, &s);
+ nanosleep(&s, NULL);
+}
+
+int cfs_need_resched(void)
+{
+ return 0;
+}
+
+void cfs_cond_resched(void)
+{
+}
+
+/*
+ * Timer
+ */
+
+void cfs_init_timer(cfs_timer_t *t)
+{
+ CFS_INIT_LIST_HEAD(&t->tl_list);
+}
+
+void cfs_timer_init(cfs_timer_t *l, cfs_timer_func_t *func, void *arg)
+{
+ CFS_INIT_LIST_HEAD(&l->tl_list);
+ l->function = func;
+ l->data = (ulong_ptr_t)arg;
+ return;
+}
+
+int cfs_timer_is_armed(cfs_timer_t *l)
+{
+ if (cfs_time_before(cfs_time_current(), l->expires))
+ return 1;
+ else
+ return 0;
+}
+
+void cfs_timer_arm(cfs_timer_t *l, cfs_time_t deadline)
+{
+ l->expires = deadline;
+}
+
+void cfs_timer_disarm(cfs_timer_t *l)
+{
+}
+cfs_time_t cfs_timer_deadline(cfs_timer_t *l)
+{
+ return l->expires;
+}
+
+
#ifdef HAVE_LIBPTHREAD
/*
*/
struct lustre_thread_arg {
- cfs_thread_t f;
+ cfs_thread_t f;
void *arg;
};
static void *cfs_thread_helper(void *data)
void *arg = targ->arg;
free(targ);
-
+
(void)f(arg);
return NULL;
}
-int cfs_create_thread(cfs_thread_t func, void *arg)
+
+int cfs_create_thread(cfs_thread_t func, void *arg, unsigned long flags)
{
pthread_t tid;
pthread_attr_t tattr;
if ( targ_p == NULL )
return -ENOMEM;
-
+
targ_p->f = func;
targ_p->arg = arg;
- pthread_attr_init(&tattr);
+ 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 getuid();
}
-int cfs_parse_int_tunable(int *value, char *name)
+gid_t cfs_curproc_gid(void)
{
- 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;
+ return getgid();
}
-/*
- * Allocator
- */
-
-cfs_page_t *cfs_alloc_page(unsigned int flags)
+uid_t cfs_curproc_fsuid(void)
{
- 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;
+ return getuid();
}
-void cfs_free_page(cfs_page_t *pg)
+gid_t cfs_curproc_fsgid(void)
{
- free(pg->addr);
- free(pg);
+ return getgid();
}
-void *cfs_page_address(cfs_page_t *pg)
+#ifndef HAVE_STRLCPY /* not in glibc for RHEL 5.x, remove when obsolete */
+size_t strlcpy(char *tgt, const char *src, size_t tgt_len)
{
- return pg->addr;
-}
+ int src_len = strlen(src);
-void *cfs_kmap(cfs_page_t *pg)
-{
- return pg->addr;
-}
+ strncpy(tgt, src, tgt_len - 1);
+ tgt[tgt_len - 1] = '\0';
-void cfs_kunmap(cfs_page_t *pg)
-{
+ return src_len + 1;
}
+#endif
-/*
- * SLAB allocator
- */
-
-cfs_mem_cache_t *
-cfs_mem_cache_create(const char *name, size_t objsize, size_t off, unsigned long flags)
+#ifndef HAVE_STRLCAT /* not in glibc for RHEL 5.x, remove when obsolete */
+size_t strlcat(char *tgt, const char *src, size_t size)
{
- cfs_mem_cache_t *c;
+ size_t tgt_len = strlen(tgt);
- 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;
-}
+ if (size > tgt_len) {
+ strncat(tgt, src, size - tgt_len - 1);
+ tgt[size - 1] = '\0';
+ }
-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;
+ return tgt_len + strlen(src);
}
+#endif
-void *cfs_mem_cache_alloc(cfs_mem_cache_t *c, int gfp)
+/* Read the environment variable of current process specified by @key. */
+int cfs_get_environ(const char *key, char *value, int *val_len)
{
- return cfs_alloc(c->size, gfp);
-}
+ char *entry;
+ int len;
-void cfs_mem_cache_free(cfs_mem_cache_t *c, void *addr)
-{
- cfs_free(addr);
+ entry = getenv(key);
+ if (entry == NULL)
+ return -ENOENT;
+
+ len = strlcpy(value, entry, *val_len);
+ if (len >= *val_len)
+ return -EOVERFLOW;
+
+ return 0;
}
void cfs_enter_debugger(void)
cfs_sigset_t cfs_block_allsigs(void)
{
- cfs_sigset_t all;
- cfs_sigset_t old;
- int rc;
+ cfs_sigset_t all;
+ cfs_sigset_t old;
+ int rc;
- sigfillset(&all);
- rc = sigprocmask(SIG_SETMASK, &all, &old);
- LASSERT(rc == 0);
+ sigfillset(&all);
+ rc = sigprocmask(SIG_BLOCK, &all, &old);
+ LASSERT(rc == 0);
- return old;
+ return old;
}
-cfs_sigset_t cfs_block_sigs(cfs_sigset_t blocks)
+cfs_sigset_t cfs_block_sigs(unsigned long sigs)
{
- cfs_sigset_t old;
- int rc;
-
- rc = sigprocmask(SIG_SETMASK, &blocks, &old);
- LASSERT (rc == 0);
+ cfs_sigset_t old;
+ cfs_sigset_t blocks = { { sigs } }; /* kludge */
+ int rc;
+
+ rc = sigprocmask(SIG_BLOCK, &blocks, &old);
+ LASSERT (rc == 0);
+
+ return old;
+}
+
+/* Block all signals except for the @sigs. It's only used in
+ * Linux kernel, just a dummy here. */
+cfs_sigset_t cfs_block_sigsinv(unsigned long sigs)
+{
+ cfs_sigset_t old;
+ int rc;
+
+ /* Return old blocked sigs */
+ rc = sigprocmask(SIG_SETMASK, NULL, &old);
+ LASSERT(rc == 0);
return old;
}
void cfs_stack_trace_fill(struct cfs_stack_trace *trace)
{
- backtrace(trace->frame, sizeof_array(trace->frame));
+ backtrace(trace->frame, ARRAY_SIZE(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))
+ if (0 <= frame_no && frame_no < ARRAY_SIZE(trace->frame))
return trace->frame[frame_no];
else
return NULL;
/* __linux__ */
#endif
-void lbug_with_loc(char *file, const char *func, const int line)
+void lbug_with_loc(struct libcfs_debug_msg_data *msgdata)
{
/* No libcfs_catastrophe in userspace! */
- libcfs_debug_msg(NULL, 0, D_EMERG, file, func, line, "LBUG\n");
+ libcfs_debug_msg(msgdata, "LBUG\n");
abort();
}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff