1 /* 2 * ---------------------------------------------------------------------------- 3 * "THE BEER-WARE LICENSE" (Revision 42): 4 * <phk@FreeBSD.ORG> wrote this file. As long as you retain this notice you 5 * can do whatever you want with this stuff. If we meet some day, and you think 6 * this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp 7 * ---------------------------------------------------------------------------- 8 * 9 * $FreeBSD$ 10 * 11 */ 12 13 #include <stdio.h> 14 #include <stdlib.h> 15 #include <fcntl.h> 16 #include <unistd.h> 17 #include <string.h> 18 #include <err.h> 19 #include <sys/ioctl.h> 20 #include <sys/param.h> 21 #include <sys/module.h> 22 #include <sys/linker.h> 23 #include <sys/mdioctl.h> 24 #include <sys/sysctl.h> 25 #include <sys/queue.h> 26 27 int list(const int); 28 void mdmaybeload(void); 29 int query(const int, const int); 30 void usage(void); 31 32 struct md_ioctl mdio; 33 34 enum {UNSET, ATTACH, DETACH, LIST} action = UNSET; 35 36 int nflag; 37 38 void 39 usage() 40 { 41 fprintf(stderr, "usage:\n"); 42 fprintf(stderr, "\tmdconfig -a -t type [-n] [-o [no]option]... [ -f file] [-s size] [-S sectorsize] [-u unit]\n"); 43 fprintf(stderr, "\tmdconfig -d -u unit\n"); 44 fprintf(stderr, "\tmdconfig -l [-n] [-u unit]\n"); 45 fprintf(stderr, "\t\ttype = {malloc, preload, vnode, swap}\n"); 46 fprintf(stderr, "\t\toption = {cluster, compress, reserve}\n"); 47 fprintf(stderr, "\t\tsize = %%d (512 byte blocks), %%dk (kB), %%dm (MB) or %%dg (GB)\n"); 48 exit(1); 49 } 50 51 int 52 main(int argc, char **argv) 53 { 54 int ch, fd, i; 55 char *p; 56 int cmdline = 0; 57 58 for (;;) { 59 ch = getopt(argc, argv, "ab:df:lno:s:S:t:u:x:y:"); 60 if (ch == -1) 61 break; 62 switch (ch) { 63 case 'a': 64 if (cmdline != 0) 65 usage(); 66 action = ATTACH; 67 cmdline = 1; 68 break; 69 case 'd': 70 if (cmdline != 0) 71 usage(); 72 action = DETACH; 73 mdio.md_options = MD_AUTOUNIT; 74 cmdline = 3; 75 break; 76 case 'l': 77 if (cmdline != 0) 78 usage(); 79 action = LIST; 80 mdio.md_options = MD_AUTOUNIT; 81 cmdline = 3; 82 break; 83 case 'n': 84 nflag = 1; 85 break; 86 case 't': 87 if (cmdline != 1) 88 usage(); 89 if (!strcmp(optarg, "malloc")) { 90 mdio.md_type = MD_MALLOC; 91 mdio.md_options = MD_AUTOUNIT | MD_COMPRESS; 92 } else if (!strcmp(optarg, "preload")) { 93 mdio.md_type = MD_PRELOAD; 94 mdio.md_options = 0; 95 } else if (!strcmp(optarg, "vnode")) { 96 mdio.md_type = MD_VNODE; 97 mdio.md_options = MD_CLUSTER | MD_AUTOUNIT | MD_COMPRESS; 98 } else if (!strcmp(optarg, "swap")) { 99 mdio.md_type = MD_SWAP; 100 mdio.md_options = MD_CLUSTER | MD_AUTOUNIT | MD_COMPRESS; 101 } else { 102 usage(); 103 } 104 cmdline=2; 105 break; 106 case 'f': 107 if (cmdline != 1 && cmdline != 2) 108 usage(); 109 if (cmdline == 1) { 110 /* Imply ``-t vnode'' */ 111 mdio.md_type = MD_VNODE; 112 mdio.md_options = MD_CLUSTER | MD_AUTOUNIT | MD_COMPRESS; 113 cmdline = 2; 114 } 115 mdio.md_file = optarg; 116 break; 117 case 'o': 118 if (cmdline != 2) 119 usage(); 120 if (!strcmp(optarg, "cluster")) 121 mdio.md_options |= MD_CLUSTER; 122 else if (!strcmp(optarg, "nocluster")) 123 mdio.md_options &= ~MD_CLUSTER; 124 else if (!strcmp(optarg, "compress")) 125 mdio.md_options |= MD_COMPRESS; 126 else if (!strcmp(optarg, "nocompress")) 127 mdio.md_options &= ~MD_COMPRESS; 128 else if (!strcmp(optarg, "force")) 129 mdio.md_options |= MD_FORCE; 130 else if (!strcmp(optarg, "noforce")) 131 mdio.md_options &= ~MD_FORCE; 132 else if (!strcmp(optarg, "reserve")) 133 mdio.md_options |= MD_RESERVE; 134 else if (!strcmp(optarg, "noreserve")) 135 mdio.md_options &= ~MD_RESERVE; 136 else 137 errx(1, "Unknown option."); 138 break; 139 case 'S': 140 if (cmdline != 2) 141 usage(); 142 mdio.md_secsize = strtoul(optarg, &p, 0); 143 break; 144 case 's': 145 if (cmdline != 2) 146 usage(); 147 mdio.md_size = strtoul(optarg, &p, 0); 148 if (p == NULL || *p == '\0') 149 ; 150 else if (*p == 'k' || *p == 'K') 151 mdio.md_size *= (1024 / DEV_BSIZE); 152 else if (*p == 'm' || *p == 'M') 153 mdio.md_size *= (1024 * 1024 / DEV_BSIZE); 154 else if (*p == 'g' || *p == 'G') 155 mdio.md_size *= (1024 * 1024 * 1024 / DEV_BSIZE); 156 else 157 errx(1, "Unknown suffix on -s argument"); 158 break; 159 case 'u': 160 if (cmdline != 2 && cmdline != 3) 161 usage(); 162 if (!strncmp(optarg, "/dev/", 5)) 163 optarg += 5; 164 if (!strncmp(optarg, MD_NAME, sizeof(MD_NAME) - 1)) 165 optarg += sizeof(MD_NAME) - 1; 166 mdio.md_unit = strtoul(optarg, &p, 0); 167 if (mdio.md_unit == (unsigned)ULONG_MAX || *p != '\0') 168 errx(1, "bad unit: %s", optarg); 169 mdio.md_options &= ~MD_AUTOUNIT; 170 break; 171 case 'x': 172 if (cmdline != 2) 173 usage(); 174 mdio.md_fwsectors = strtoul(optarg, &p, 0); 175 break; 176 case 'y': 177 if (cmdline != 2) 178 usage(); 179 mdio.md_fwheads = strtoul(optarg, &p, 0); 180 break; 181 default: 182 usage(); 183 } 184 } 185 mdio.md_version = MDIOVERSION; 186 187 mdmaybeload(); 188 fd = open("/dev/" MDCTL_NAME, O_RDWR, 0); 189 if (fd < 0) 190 err(1, "open(/dev/%s)", MDCTL_NAME); 191 if (cmdline == 2 192 && (mdio.md_type == MD_MALLOC || mdio.md_type == MD_SWAP)) 193 if (mdio.md_size == 0) 194 errx(1, "must specify -s for -t malloc or -t swap"); 195 if (cmdline == 2 && mdio.md_type == MD_VNODE) 196 if (mdio.md_file == NULL) 197 errx(1, "must specify -f for -t vnode"); 198 if (action == LIST) { 199 if (mdio.md_options & MD_AUTOUNIT) 200 list(fd); 201 else 202 query(fd, mdio.md_unit); 203 } else if (action == ATTACH) { 204 if (cmdline < 2) 205 usage(); 206 i = ioctl(fd, MDIOCATTACH, &mdio); 207 if (i < 0) 208 err(1, "ioctl(/dev/%s)", MDCTL_NAME); 209 if (mdio.md_options & MD_AUTOUNIT) 210 printf("%s%d\n", nflag ? "" : MD_NAME, mdio.md_unit); 211 } else if (action == DETACH) { 212 if (mdio.md_options & MD_AUTOUNIT) 213 usage(); 214 i = ioctl(fd, MDIOCDETACH, &mdio); 215 if (i < 0) 216 err(1, "ioctl(/dev/%s)", MDCTL_NAME); 217 } else 218 usage(); 219 close (fd); 220 return (0); 221 } 222 223 struct dl { 224 int unit; 225 SLIST_ENTRY(dl) slist; 226 }; 227 228 SLIST_HEAD(, dl) dlist = SLIST_HEAD_INITIALIZER(&dlist); 229 230 int 231 list(const int fd) 232 { 233 int unit; 234 235 if (ioctl(fd, MDIOCLIST, &mdio) < 0) 236 err(1, "ioctl(/dev/%s)", MDCTL_NAME); 237 for (unit = 0; unit < mdio.md_pad[0] && unit < MDNPAD - 1; unit++) { 238 printf("%s%s%d", unit > 0 ? " " : "", 239 nflag ? "" : MD_NAME, mdio.md_pad[unit + 1]); 240 } 241 if (mdio.md_pad[0] - unit > 0) 242 printf(" ... %d more", mdio.md_pad[0] - unit); 243 printf("\n"); 244 return (0); 245 } 246 247 int 248 query(const int fd, const int unit) 249 { 250 251 mdio.md_version = MDIOVERSION; 252 mdio.md_unit = unit; 253 254 if (ioctl(fd, MDIOCQUERY, &mdio) < 0) 255 err(1, "ioctl(/dev/%s)", MDCTL_NAME); 256 257 switch (mdio.md_type) { 258 case MD_MALLOC: 259 (void)printf("%s%d\tmalloc\t%d KBytes\n", MD_NAME, 260 mdio.md_unit, mdio.md_size / 2); 261 break; 262 case MD_PRELOAD: 263 (void)printf("%s%d\tpreload\t%d KBytes\n", MD_NAME, 264 mdio.md_unit, mdio.md_size / 2); 265 break; 266 case MD_SWAP: 267 (void)printf("%s%d\tswap\t%d KBytes\n", MD_NAME, 268 mdio.md_unit, mdio.md_size / 2); 269 break; 270 case MD_VNODE: 271 (void)printf("%s%d\tvnode\t%d KBytes\n", MD_NAME, 272 mdio.md_unit, mdio.md_size / 2); 273 break; 274 } 275 276 return (0); 277 } 278 279 void 280 mdmaybeload(void) 281 { 282 struct module_stat mstat; 283 int fileid, modid; 284 const char *name; 285 char *cp; 286 287 name = MD_NAME; 288 /* scan files in kernel */ 289 mstat.version = sizeof(struct module_stat); 290 for (fileid = kldnext(0); fileid > 0; fileid = kldnext(fileid)) { 291 /* scan modules in file */ 292 for (modid = kldfirstmod(fileid); modid > 0; 293 modid = modfnext(modid)) { 294 if (modstat(modid, &mstat) < 0) 295 continue; 296 /* strip bus name if present */ 297 if ((cp = strchr(mstat.name, '/')) != NULL) { 298 cp++; 299 } else { 300 cp = mstat.name; 301 } 302 /* already loaded? */ 303 if (!strcmp(name, cp)) 304 return; 305 } 306 } 307 /* not present, we should try to load it */ 308 kldload(name); 309 } 310 311