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