1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (C) 2018 Universita` di Pisa 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD$ 30 */ 31 32 #include <sys/types.h> 33 #include <sys/stat.h> 34 #include <sys/ioctl.h> 35 #include <sys/mman.h> 36 #include <fcntl.h> 37 #include <stdlib.h> 38 #include <stdio.h> 39 #include <stdarg.h> 40 #include <string.h> 41 #include <unistd.h> 42 #include <errno.h> 43 #include <net/netmap_user.h> 44 #define LIBNETMAP_NOTHREADSAFE 45 #include "libnetmap.h" 46 47 static void 48 nmctx_default_error(struct nmctx *ctx, const char *errmsg) 49 { 50 (void)ctx; 51 fprintf(stderr, "%s\n", errmsg); 52 } 53 54 static void * 55 nmctx_default_malloc(struct nmctx *ctx, size_t sz) 56 { 57 (void)ctx; 58 return malloc(sz); 59 } 60 61 static void 62 nmctx_default_free(struct nmctx *ctx, void *p) 63 { 64 (void)ctx; 65 free(p); 66 } 67 68 static struct nmctx nmctx_global = { 69 .verbose = 1, 70 .error = nmctx_default_error, 71 .malloc = nmctx_default_malloc, 72 .free = nmctx_default_free, 73 .lock = NULL, 74 }; 75 76 static struct nmctx *nmctx_default = &nmctx_global; 77 78 struct nmctx * 79 nmctx_get(void) 80 { 81 return nmctx_default; 82 } 83 84 struct nmctx * 85 nmctx_set_default(struct nmctx *ctx) 86 { 87 struct nmctx *old = nmctx_default; 88 nmctx_default = ctx; 89 return old; 90 } 91 92 #define MAXERRMSG 1000 93 void 94 nmctx_ferror(struct nmctx *ctx, const char *fmt, ...) 95 { 96 char errmsg[MAXERRMSG]; 97 va_list ap; 98 int rv; 99 100 if (!ctx->verbose) 101 return; 102 103 va_start(ap, fmt); 104 rv = vsnprintf(errmsg, MAXERRMSG, fmt, ap); 105 va_end(ap); 106 107 if (rv > 0) { 108 if (rv < MAXERRMSG) { 109 ctx->error(ctx, errmsg); 110 } else { 111 ctx->error(ctx, "error message too long"); 112 } 113 } else { 114 ctx->error(ctx, "internal error"); 115 } 116 } 117 118 void * 119 nmctx_malloc(struct nmctx *ctx, size_t sz) 120 { 121 return ctx->malloc(ctx, sz); 122 } 123 124 void 125 nmctx_free(struct nmctx *ctx, void *p) 126 { 127 ctx->free(ctx, p); 128 } 129 130 void 131 nmctx_lock(struct nmctx *ctx) 132 { 133 if (ctx->lock != NULL) 134 ctx->lock(ctx, 1); 135 } 136 137 void 138 nmctx_unlock(struct nmctx *ctx) 139 { 140 if (ctx->lock != NULL) 141 ctx->lock(ctx, 0); 142 } 143