1 /* ProcFS - service.c - the service subdirectory */ 2 3 #include "inc.h" 4 5 #include <minix/rs.h> 6 #include "rs/const.h" 7 #include "rs/type.h" 8 9 enum policy { 10 POL_NONE = 0x00, /* user | endpoint */ 11 POL_RESET = 0x01, /* visible | change */ 12 POL_RESTART = 0x02, /* transparent | preserved */ 13 POL_LIVE_UPDATE = 0x04 /* transparent | preserved */ 14 }; 15 16 struct policies { 17 #define MAX_POL_FORMAT_SZ 20 18 char formatted[MAX_POL_FORMAT_SZ]; 19 enum policy supported; 20 }; 21 22 typedef struct { 23 struct rproc proc[NR_SYS_PROCS]; 24 struct rprocpub pub[NR_SYS_PROCS]; 25 } ixfer_rproc_t; 26 static ixfer_rproc_t rproc; 27 28 static struct policies policies[NR_SYS_PROCS]; 29 30 static struct inode *service_node; 31 32 /* Updates the policies state from RS. Always returns an ASCIIZ string. */ 33 static const char * 34 service_get_policies(struct policies * pol, index_t slot) 35 { 36 #if 1 /* The following should be retrieved from RS and formated instead. */ 37 int pos; 38 char *ref_label; 39 static const struct { 40 const char *label; 41 const char *policy_str; 42 } def_pol[] = { 43 /* audio */ 44 { .label = "als4000", .policy_str = "reset" }, 45 { .label = "cmi8738", .policy_str = "reset" }, 46 { .label = "cs4281", .policy_str = "reset" }, 47 { .label = "es1370", .policy_str = "reset" }, 48 { .label = "es1371", .policy_str = "reset" }, 49 { .label = "sb16", .policy_str = "reset" }, 50 { .label = "trident", .policy_str = "reset" }, 51 /* bus */ 52 { .label = "i2c", .policy_str = "restart" }, 53 { .label = "pci", .policy_str = "restart" }, 54 { .label = "ti1225", .policy_str = "restart" }, 55 /* clock */ 56 { .label = "readclock.drv", .policy_str = "restart" }, 57 /* eeprom */ 58 { .label = "cat24c256", .policy_str = "restart" }, 59 /* examples */ 60 { .label = "hello", .policy_str = "restart" }, 61 /* hid */ 62 { .label = "pckbd", .policy_str = "reset" }, 63 /* iommu */ 64 { .label = "amddev", .policy_str = "" }, 65 /* net */ 66 { .label = "3c90x", .policy_str = "reset" }, 67 { .label = "atl2", .policy_str = "reset" }, 68 { .label = "dec21140A", .policy_str = "reset" }, 69 { .label = "dp8390", .policy_str = "reset" }, 70 { .label = "dpeth", .policy_str = "reset" }, 71 { .label = "e1000", .policy_str = "reset" }, 72 { .label = "fxp", .policy_str = "reset" }, 73 { .label = "ip1000", .policy_str = "reset" }, 74 { .label = "lance", .policy_str = "reset" }, 75 { .label = "lan8710a", .policy_str = "reset" }, 76 { .label = "orinoco", .policy_str = "reset" }, 77 { .label = "rtl8139", .policy_str = "reset" }, 78 { .label = "rtl8169", .policy_str = "reset" }, 79 { .label = "uds", .policy_str = "reset" }, 80 { .label = "virtio_net", .policy_str = "reset" }, 81 { .label = "vt6105", .policy_str = "reset" }, 82 /* power */ 83 { .label = "acpi", .policy_str = "" }, 84 { .label = "tps65217", .policy_str = "" }, 85 { .label = "tps65590", .policy_str = "" }, 86 /* printer */ 87 { .label = "printer", .policy_str = "restart" }, 88 /* sensors */ 89 { .label = "bmp085", .policy_str = "" }, 90 { .label = "sht21", .policy_str = "restart" }, 91 { .label = "tsl2550", .policy_str = "restart" }, 92 /* storage */ 93 { .label = "ahci", .policy_str = "reset" }, 94 { .label = "at_wini", .policy_str = "reset" }, 95 { .label = "fbd", .policy_str = "reset" }, 96 { .label = "filter", .policy_str = "reset" }, 97 { .label = "floppy", .policy_str = "reset" }, 98 { .label = "memory", .policy_str = "restart" }, 99 { .label = "mmc", .policy_str = "reset" }, 100 { .label = "virtio_blk", .policy_str = "reset" }, 101 { .label = "vnd", .policy_str = "reset" }, 102 /* system */ 103 { .label = "gpio", .policy_str = "restart" }, 104 { .label = "log", .policy_str = "reset" }, 105 { .label = "random", .policy_str = "restart" }, 106 /* tty */ 107 { .label = "pty", .policy_str = "restart" }, 108 { .label = "tty", .policy_str = "restart" }, 109 /* usb */ 110 { .label = "usbd", .policy_str = "" }, 111 { .label = "usb_hub", .policy_str = "" }, 112 { .label = "usb_storage", .policy_str = "" }, 113 /* video */ 114 { .label = "fb", .policy_str = "" }, 115 { .label = "tda19988", .policy_str = "" }, 116 /* vmm_guest */ 117 { .label = "vbox", .policy_str = "" }, 118 /* fs */ 119 { .label = "ext2", .policy_str = "" }, 120 { .label = "hgfs", .policy_str = "" }, 121 { .label = "isofs", .policy_str = "" }, 122 { .label = "mfs", .policy_str = "restart" }, 123 { .label = "pfs", .policy_str = "restart" }, 124 { .label = "procfs", .policy_str = "restart" }, 125 { .label = "ptyfs", .policy_str = "" }, 126 { .label = "vbfs", .policy_str = "" }, 127 /* net */ 128 { .label = "lwip", .policy_str = "reset" }, 129 /* servers */ 130 { .label = "devman", .policy_str = "restart" }, 131 { .label = "ds", .policy_str = "restart" }, 132 { .label = "input", .policy_str = "reset" }, 133 { .label = "ipc", .policy_str = "restart" }, 134 { .label = "is", .policy_str = "restart" }, 135 { .label = "mib", .policy_str = "restart" }, 136 { .label = "pm", .policy_str = "restart" }, 137 { .label = "rs", .policy_str = "restart" }, 138 { .label = "sched", .policy_str = "restart" }, 139 { .label = "vfs", .policy_str = "restart" }, 140 { .label = "vm", .policy_str = "restart" }, 141 //{ .label = "", .policy_str = "" }, 142 }; 143 144 /* Find the related policy, based on the file name of the service. */ 145 ref_label = strrchr(rproc.pub[slot].proc_name, '/'); 146 if (NULL == ref_label) 147 ref_label = rproc.pub[slot].proc_name; 148 149 memset(pol[slot].formatted, 0, MAX_POL_FORMAT_SZ); 150 for(pos = 0; pos < (sizeof(def_pol) / sizeof(def_pol[0])); pos++) { 151 if (0 == strcmp(ref_label, def_pol[pos].label)) { 152 (void)strncpy(pol[slot].formatted, 153 def_pol[pos].policy_str, MAX_POL_FORMAT_SZ); 154 pol[slot].formatted[MAX_POL_FORMAT_SZ-1] = '\0'; 155 break; 156 } 157 } 158 #else 159 /* Should do something sensible, based on flags from RS/SEF. */ 160 #endif 161 162 return pol[slot].formatted; 163 } 164 165 /* Returns a ASCIIZ string encoding RS flags. */ 166 static const char * 167 service_get_flags(index_t slot) 168 { 169 static char str[10]; 170 int flags, sys_flags; 171 172 flags = rproc.proc[slot].r_flags; 173 sys_flags = rproc.pub[slot].sys_flags; 174 175 str[0] = (flags & RS_ACTIVE) ? 'A' : '-'; 176 str[1] = (flags & RS_UPDATING) ? 'U' : '-'; 177 str[2] = (flags & RS_EXITING) ? 'E' : '-'; 178 str[3] = (flags & RS_NOPINGREPLY) ? 'N' : '-'; 179 str[4] = (sys_flags & SF_USE_COPY) ? 'C' : '-'; 180 str[5] = (sys_flags & SF_USE_REPL) ? 'R' : '-'; 181 str[6] = (sys_flags & SF_NEED_COPY) ? 'c' : '-'; 182 str[7] = (sys_flags & SF_NEED_REPL) ? 'r' : '-'; 183 str[8] = (sys_flags & SF_CORE_SRV) ? 's' : '-'; 184 str[9] = '\0'; 185 186 return str; 187 } 188 189 /* 190 * Return whether a slot is in use and active. The purpose of this check is 191 * to ensure that after eliminating all slots that do not pass this check, we 192 * are left with a set of live services each with a unique label. 193 */ 194 static int 195 service_active(index_t slot) 196 { 197 198 /* 199 * Init is in RS's process tables as the representation of user 200 * processes. It is not a system service. 201 */ 202 return ((rproc.proc[slot].r_flags & (RS_IN_USE | RS_ACTIVE)) == 203 (RS_IN_USE | RS_ACTIVE) && 204 rproc.pub[slot].endpoint != INIT_PROC_NR); 205 } 206 207 /* 208 * Update the contents of the service directory, by first updating the RS 209 * tables and then updating the directory contents. 210 */ 211 static void 212 service_update(void) 213 { 214 struct inode *node; 215 struct inode_stat stat; 216 index_t slot; 217 static int warned = FALSE; 218 int r; 219 220 /* There is not much we can do if this call fails. */ 221 r = getsysinfo(RS_PROC_NR, SI_PROCALL_TAB, &rproc, sizeof(rproc)); 222 if (r != OK && !warned) { 223 printf("PROCFS: unable to obtain RS tables (%d)\n", r); 224 warned = TRUE; 225 } 226 227 /* 228 * As with PIDs, we make two passes. Delete first, then add. This 229 * prevents problems in the hypothetical case that between updates, one 230 * slot ends up with the label name of a previous, different slot. 231 */ 232 for (slot = 0; slot < NR_SYS_PROCS; slot++) { 233 if ((node = get_inode_by_index(service_node, slot)) == NULL) 234 continue; 235 236 /* 237 * If the slot is no longer in use, or the label name does not 238 * match, the node must be deleted. 239 */ 240 if (!service_active(slot) || 241 strcmp(get_inode_name(node), rproc.pub[slot].label)) 242 delete_inode(node); 243 } 244 245 memset(&stat, 0, sizeof(stat)); 246 stat.mode = REG_ALL_MODE; 247 stat.uid = SUPER_USER; 248 stat.gid = SUPER_USER; 249 250 for (slot = 0; slot < NR_SYS_PROCS; slot++) { 251 if (!service_active(slot) || 252 get_inode_by_index(service_node, slot) != NULL) 253 continue; 254 255 node = add_inode(service_node, rproc.pub[slot].label, slot, 256 &stat, (index_t)0, (cbdata_t)slot); 257 258 if (node == NULL) 259 out_of_inodes(); 260 } 261 } 262 263 /* 264 * Initialize the service directory. 265 */ 266 void 267 service_init(void) 268 { 269 struct inode *root, *node; 270 struct inode_stat stat; 271 272 root = get_root_inode(); 273 274 memset(&stat, 0, sizeof(stat)); 275 stat.mode = DIR_ALL_MODE; 276 stat.uid = SUPER_USER; 277 stat.gid = SUPER_USER; 278 279 service_node = add_inode(root, "service", NO_INDEX, &stat, 280 NR_SYS_PROCS, NULL); 281 282 if (service_node == NULL) 283 panic("unable to create service node"); 284 } 285 286 /* 287 * A lookup request is being performed. If it is in the service directory, 288 * update the tables. We do this lazily, to reduce overhead. 289 */ 290 void 291 service_lookup(struct inode * parent, clock_t now) 292 { 293 static clock_t last_update = 0; 294 295 if (parent != service_node) 296 return; 297 298 if (last_update != now) { 299 service_update(); 300 301 last_update = now; 302 } 303 } 304 305 /* 306 * A getdents request is being performed. If it is in the service directory, 307 * update the tables. 308 */ 309 void 310 service_getdents(struct inode * node) 311 { 312 313 if (node != service_node) 314 return; 315 316 service_update(); 317 } 318 319 /* 320 * A read request is being performed. If it is on a file in the service 321 * directory, process the read request. We rely on the fact that any read 322 * call will have been preceded by a lookup, so its table entry has been 323 * updated very recently. 324 */ 325 void 326 service_read(struct inode * node) 327 { 328 struct inode *parent; 329 index_t slot; 330 struct rprocpub *rpub; 331 struct rproc *rp; 332 333 if (get_parent_inode(node) != service_node) 334 return; 335 336 slot = get_inode_index(node); 337 rpub = &rproc.pub[slot]; 338 rp = &rproc.proc[slot]; 339 340 /* TODO: add a large number of other fields! */ 341 buf_printf("filename: %s\n", rpub->proc_name); 342 buf_printf("endpoint: %d\n", rpub->endpoint); 343 buf_printf("pid: %d\n", rp->r_pid); 344 buf_printf("restarts: %d\n", rp->r_restarts); 345 buf_printf("flags: %s\n", service_get_flags(slot)); 346 buf_printf("policies: %s\n", service_get_policies(policies, slot)); 347 buf_printf("ASRcount: %u\n", rp->r_asr_count); 348 } 349