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