1 /*- 2 * Copyright (c) 1994 Christos Zoulas 3 * Copyright (c) 1995 Frank van der Linden 4 * Copyright (c) 1995 Scott Bartram 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 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 * 29 * from: svr4_util.c,v 1.5 1995/01/22 23:44:50 christos Exp 30 */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include <sys/param.h> 36 #include <sys/bus.h> 37 #include <sys/lock.h> 38 #include <sys/malloc.h> 39 #include <sys/linker_set.h> 40 #include <sys/mutex.h> 41 #include <sys/namei.h> 42 #include <sys/proc.h> 43 #include <sys/syscallsubr.h> 44 #include <sys/systm.h> 45 #include <sys/vnode.h> 46 47 #include <machine/stdarg.h> 48 49 #include <compat/linux/linux_util.h> 50 51 const char linux_emul_path[] = "/compat/linux"; 52 53 /* 54 * Search an alternate path before passing pathname arguments on 55 * to system calls. Useful for keeping a separate 'emulation tree'. 56 * 57 * If cflag is set, we check if an attempt can be made to create 58 * the named file, i.e. we check if the directory it should 59 * be in exists. 60 */ 61 int 62 linux_emul_convpath(td, path, pathseg, pbuf, cflag) 63 struct thread *td; 64 char *path; 65 enum uio_seg pathseg; 66 char **pbuf; 67 int cflag; 68 { 69 70 return (kern_alternate_path(td, linux_emul_path, path, pathseg, pbuf, 71 cflag)); 72 } 73 74 void 75 linux_msg(const struct thread *td, const char *fmt, ...) 76 { 77 va_list ap; 78 struct proc *p; 79 80 p = td->td_proc; 81 printf("linux: pid %d (%s): ", (int)p->p_pid, p->p_comm); 82 va_start(ap, fmt); 83 vprintf(fmt, ap); 84 va_end(ap); 85 printf("\n"); 86 } 87 88 MALLOC_DECLARE(M_LINUX); 89 90 struct device_element 91 { 92 TAILQ_ENTRY(device_element) list; 93 struct linux_device_handler entry; 94 }; 95 96 static TAILQ_HEAD(, device_element) devices = 97 TAILQ_HEAD_INITIALIZER(devices); 98 99 static struct linux_device_handler null_handler = 100 { "mem", "mem", "null", "null", 1, 3, 1}; 101 102 DATA_SET(linux_device_handler_set, null_handler); 103 104 char * 105 linux_driver_get_name_dev(device_t dev) 106 { 107 struct device_element *de; 108 const char *device_name = device_get_name(dev); 109 110 if (device_name == NULL) 111 return NULL; 112 TAILQ_FOREACH(de, &devices, list) { 113 if (strcmp(device_name, de->entry.bsd_driver_name) == 0) 114 return (de->entry.linux_driver_name); 115 } 116 117 return NULL; 118 } 119 120 int 121 linux_driver_get_major_minor(char *node, int *major, int *minor) 122 { 123 struct device_element *de; 124 125 if (node == NULL || major == NULL || minor == NULL) 126 return 1; 127 TAILQ_FOREACH(de, &devices, list) { 128 if (strcmp(node, de->entry.bsd_device_name) == 0) { 129 *major = de->entry.linux_major; 130 *minor = de->entry.linux_minor; 131 return 0; 132 } 133 } 134 135 return 1; 136 } 137 138 char * 139 linux_get_char_devices() 140 { 141 struct device_element *de; 142 char *temp, *string, *last; 143 char formated[256]; 144 int current_size = 0, string_size = 1024; 145 146 MALLOC(string, char *, string_size, M_LINUX, M_WAITOK); 147 string[0] = '\000'; 148 last = ""; 149 TAILQ_FOREACH(de, &devices, list) { 150 if (!de->entry.linux_char_device) 151 continue; 152 temp = string; 153 if (strcmp(last, de->entry.bsd_driver_name) != 0) { 154 last = de->entry.bsd_driver_name; 155 156 snprintf(formated, sizeof(formated), "%3d %s\n", 157 de->entry.linux_major, 158 de->entry.linux_device_name); 159 if (strlen(formated) + current_size 160 >= string_size) { 161 string_size *= 2; 162 MALLOC(string, char *, string_size, 163 M_LINUX, M_WAITOK); 164 bcopy(temp, string, current_size); 165 FREE(temp, M_LINUX); 166 } 167 strcat(string, formated); 168 current_size = strlen(string); 169 } 170 } 171 172 return string; 173 } 174 175 void 176 linux_free_get_char_devices(char *string) 177 { 178 FREE(string, M_LINUX); 179 } 180 181 static int linux_major_starting = 200; 182 183 int 184 linux_device_register_handler(struct linux_device_handler *d) 185 { 186 struct device_element *de; 187 188 if (d == NULL) 189 return (EINVAL); 190 191 MALLOC(de, struct device_element *, sizeof(*de), 192 M_LINUX, M_WAITOK); 193 if (d->linux_major < 0) { 194 d->linux_major = linux_major_starting++; 195 } 196 bcopy(d, &de->entry, sizeof(*d)); 197 198 /* Add the element to the list, sorted on span. */ 199 TAILQ_INSERT_TAIL(&devices, de, list); 200 201 return (0); 202 } 203 204 int 205 linux_device_unregister_handler(struct linux_device_handler *d) 206 { 207 struct device_element *de; 208 209 if (d == NULL) 210 return (EINVAL); 211 212 TAILQ_FOREACH(de, &devices, list) { 213 if (bcmp(d, &de->entry, sizeof(*d)) == 0) { 214 TAILQ_REMOVE(&devices, de, list); 215 FREE(de, M_LINUX); 216 return (0); 217 } 218 } 219 220 return (EINVAL); 221 } 222