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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
*/
/*
* Copyright 2019 Joyent, Inc.
*/
#include <sys/types.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <alloca.h>
#include <stdio.h>
#include <unistd.h>
#include <dlfcn.h>
#include <thread.h>
#include <pthread.h>
#include <ctype.h>
#include <scsi/libsmp.h>
#include <scsi/libsmp_plugin.h>
#include "smp_impl.h"
__thread smp_errno_t _smp_errno;
__thread char _smp_errmsg[LIBSMP_ERRMSGLEN];
int
smp_assert(const char *expr, const char *file, int line)
{
char *msg;
size_t len;
len = snprintf(NULL, 0,
"ABORT: \"%s\", line %d: assertion failed: %s\n", file, line, expr);
msg = alloca(len + 1);
(void) snprintf(msg, len + 1,
"ABORT: \"%s\", line %d: assertion failed: %s\n", file, line, expr);
(void) write(STDERR_FILENO, msg, strlen(msg));
abort();
/*NOTREACHED*/
}
int
smp_set_errno(smp_errno_t err)
{
_smp_errno = err;
_smp_errmsg[0] = '\0';
return (-1);
}
/*
* Internal routine for setting both _smp_errno and _smp_errmsg. We save
* and restore the UNIX errno across this routing so the caller can use either
* smp_set_errno(), smp_error(), or smp_verror() without this value changing.
*/
int
smp_verror(smp_errno_t err, const char *fmt, va_list ap)
{
size_t n;
char *errmsg;
/*
* To allow the existing error message to itself be used in an error
* message, we put the new error message into a buffer on the stack,
* and then copy it into lsh_errmsg. We also need to set the errno,
* but because the call to smp_set_errno() is destructive to
* lsh_errmsg, we do this after we print into our temporary buffer
* (in case _smp_errmsg is part of the error message) and before we
* copy the temporary buffer on to _smp_errmsg (to prevent our new
* message from being nuked by the call to smp_set_errno()).
*/
errmsg = alloca(sizeof (_smp_errmsg));
(void) vsnprintf(errmsg, sizeof (_smp_errmsg), fmt, ap);
(void) smp_set_errno(err);
n = strlen(errmsg);
if (n != 0 && errmsg[n - 1] == '\n')
errmsg[n - 1] = '\0';
bcopy(errmsg, _smp_errmsg, n + 1);
return (-1);
}
int
smp_error(smp_errno_t err, const char *fmt, ...)
{
va_list ap;
if (fmt == NULL)
return (smp_set_errno(err));
va_start(ap, fmt);
err = smp_verror(err, fmt, ap);
va_end(ap);
return (err);
}
smp_errno_t
smp_errno(void)
{
return (_smp_errno);
}
const char *
smp_errmsg(void)
{
if (_smp_errmsg[0] == '\0')
(void) strlcpy(_smp_errmsg, smp_strerror(_smp_errno),
sizeof (_smp_errmsg));
return (_smp_errmsg);
}
/*ARGSUSED*/
void *
smp_alloc(size_t size)
{
void *mem;
if (size == 0) {
(void) smp_set_errno(ESMP_ZERO_LENGTH);
return (NULL);
}
if ((mem = malloc(size)) == NULL)
(void) smp_set_errno(ESMP_NOMEM);
return (mem);
}
void *
smp_zalloc(size_t size)
{
void *mem;
if ((mem = smp_alloc(size)) == NULL)
return (NULL);
bzero(mem, size);
return (mem);
}
char *
smp_strdup(const char *str)
{
size_t len = strlen(str);
char *dup = smp_alloc(len + 1);
if (dup == NULL)
return (NULL);
return (strcpy(dup, str));
}
void
smp_free(void *ptr)
{
free(ptr);
}
/*
* Trim any leading and/or trailing spaces from the fixed-length string
* argument and return a newly-allocated copy of it.
*/
char *
smp_trim_strdup(const char *str, size_t len)
{
const char *p;
char *r;
for (p = str; p - str < len && isspace(*p); p++)
;
len -= (p - str);
if (len == 0)
return (NULL);
for (str = p + len - 1; str > p && isspace(*str); str--, len--)
;
if (len == 0)
return (NULL);
r = smp_alloc(len + 1);
if (r == NULL)
return (NULL);
bcopy(p, r, len);
r[len] = '\0';
return (r);
}
int
smp_init(int version)
{
if (version != LIBSMP_VERSION)
return (smp_error(ESMP_VERSION,
"library version %d does not match requested version %d",
LIBSMP_VERSION, version));
smp_engine_init();
return (0);
}
void
smp_fini(void)
{
smp_engine_fini();
}
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