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