release/src/router/rc/usb.c

   1 /*
   2
   3         USB Support
   4
   5 */
   6 #include "rc.h"
   7
   8 #include <sys/types.h>
   9 #include <unistd.h>
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12 #include <arpa/inet.h>
  13 #include <time.h>
  14 #include <sys/time.h>
  15 #include <errno.h>
  16
  17 #include <sys/mount.h>
  18 #include <mntent.h>
  19 #include <dirent.h>
  20 #include <sys/file.h>
  21 #include <sys/swap.h>
  22
  23 /* Adjust bdflush parameters.
  24  * Do this here, because Tomato doesn't have the sysctl command.
  25  * With these values, a disk block should be written to disk within 2 seconds.
  26  */
  27 #ifdef LINUX26
  28 void tune_bdflush(void)
  29 {
  30         f_write_string("/proc/sys/vm/dirty_expire_centisecs", "200", 0, 0);
  31         f_write_string("/proc/sys/vm/dirty_writeback_centisecs", "200", 0, 0);
  32 }
  33 #else
  34 #include <sys/kdaemon.h>
  35 #define SET_PARM(n) (n * 2 | 1)
  36 void tune_bdflush(void)
  37 {
  38         bdflush(SET_PARM(5), 100);
  39         bdflush(SET_PARM(6), 100);
  40         bdflush(SET_PARM(8), 0);
  41 }
  42 #endif // LINUX26
  43
  44 #define USBCORE_MOD     "usbcore"
  45 #define USB20_MOD       "ehci-hcd"
  46 #define USBSTORAGE_MOD  "usb-storage"
  47 #define SCSI_MOD        "scsi_mod"
  48 #define SD_MOD          "sd_mod"
  49 #ifdef LINUX26
  50 #define USBOHCI_MOD     "ohci-hcd"
  51 #define USBUHCI_MOD     "uhci-hcd"
  52 #define USBPRINTER_MOD  "usblp"
  53 #define SCSI_WAIT_MOD   "scsi_wait_scan"
  54 #define USBFS           "usbfs"
  55 #else
  56 #define USBOHCI_MOD     "usb-ohci"
  57 #define USBUHCI_MOD     "usb-uhci"
  58 #define USBPRINTER_MOD  "printer"
  59 #define USBFS           "usbdevfs"
  60 #endif
  61
  62 static int p9100d_sig(int sig)
  63 {
  64         const char p910pid[] = "/var/run/p9100d.pid";
  65         char s[32];
  66         int pid;
  67
  68         if (f_read_string(p910pid, s, sizeof(s)) > 0) {
  69                 if ((pid = atoi(s)) > 1) {
  70                         if (kill(pid, sig) == 0) {
  71                                 if (sig == SIGTERM) {
  72                                         sleep(1);
  73                                         unlink(p910pid);
  74                                 }
  75                                 return 0;
  76                         }
  77                 }
  78         }
  79         return -1;
  80 }
  81
  82 void start_usb(void)
  83 {
  84         char param[32];
  85         int i;
  86
  87         _dprintf("%s\n", __FUNCTION__);
  88         tune_bdflush();
  89
  90         if (nvram_get_int("usb_enable")) {
  91                 modprobe(USBCORE_MOD);
  92
  93                 /* mount usb device filesystem */
  94                 mount(USBFS, "/proc/bus/usb", USBFS, MS_MGC_VAL, NULL);
  95
  96 #ifdef LINUX26
  97                 i = do_led(LED_USB, LED_PROBE);
  98                 if (i != 255) {
  99                         modprobe("ledtrig-usbdev");
 100                         modprobe("leds-usb");
 101                         sprintf(param, "%d", i);
 102                         f_write_string("/sys/class/leds/usb-led/gpio_pin", param, 0, 0);
 103                         f_write_string("/sys/class/leds/usb-led/device_name", "1-1", 0, 0);
 104                 }
 105 #endif
 106                 if (nvram_get_int("usb_storage")) {
 107                         /* insert scsi and storage modules before usb drivers */
 108                         modprobe(SCSI_MOD);
 109 #ifdef LINUX26
 110                         modprobe(SCSI_WAIT_MOD);
 111 #endif
 112                         modprobe(SD_MOD);
 113                         modprobe(USBSTORAGE_MOD);
 114
 115                         if (nvram_get_int("usb_fs_ext3")) {
 116 #ifdef LINUX26
 117                                 modprobe("mbcache");    // used by ext2/ext3
 118 #endif
 119                                 /* insert ext3 first so that lazy mount tries ext3 before ext2 */
 120                                 modprobe("jbd");
 121                                 modprobe("ext3");
 122                                 modprobe("ext2");
 123                         }
 124
 125                         if (nvram_get_int("usb_fs_fat")) {
 126                                 modprobe("fat");
 127                                 modprobe("vfat");
 128                         }
 129 #ifdef TCONFIG_HFS
 130                         if (nvram_get_int("usb_fs_hfs")) {
 131                                 modprobe("hfs");
 132                                 modprobe("hfsplus");
 133                         }
 134 #endif
 135                 }
 136
 137                 /* if enabled, force USB2 before USB1.1 */
 138                 if (nvram_get_int("usb_usb2") == 1) {
 139                         i = nvram_get_int("usb_irq_thresh");
 140                         if ((i < 0) || (i > 6))
 141                                 i = 0;
 142                         sprintf(param, "log2_irq_thresh=%d", i);
 143                         modprobe(USB20_MOD, param);
 144                 }
 145
 146                 if (nvram_get_int("usb_uhci") == 1) {
 147                         modprobe(USBUHCI_MOD);
 148                 }
 149
 150                 if (nvram_get_int("usb_ohci") == 1) {
 151                         modprobe(USBOHCI_MOD);
 152                 }
 153
 154                 if (nvram_get_int("usb_printer")) {
 155                         symlink("/dev/usb", "/dev/printers");
 156                         modprobe(USBPRINTER_MOD);
 157
 158                         /* start printer server only if not already running */
 159                         if (p9100d_sig(0) != 0) {
 160                                 eval("p910nd",
 161                                 nvram_get_int("usb_printer_bidirect") ? "-b" : "", //bidirectional
 162                                 "-f", "/dev/usb/lp0", // device
 163                                 "0" // listen port
 164                                 );
 165                         }
 166                 }
 167 #ifdef LINUX26
 168                 if (nvram_get_int("idle_enable") == 1) {
 169                         xstart( "sd-idle" );
 170                 }
 171 #endif
 172
 173 #ifdef TCONFIG_UPS
 174                 start_ups();
 175 #endif
 176
 177         }
 178 }
 179
 180 void stop_usb(void)
 181 {
 182         int disabled = !nvram_get_int("usb_enable");
 183
 184         // only find and kill the printer server we started (port 0)
 185         p9100d_sig(SIGTERM);
 186         modprobe_r(USBPRINTER_MOD);
 187
 188         // only stop storage services if disabled
 189         if (disabled || !nvram_get_int("usb_storage")) {
 190                 // Unmount all partitions
 191                 remove_storage_main(0);
 192
 193                 // Stop storage services
 194                 modprobe_r("ext2");
 195                 modprobe_r("ext3");
 196                 modprobe_r("jbd");
 197 #ifdef LINUX26
 198                 modprobe_r("mbcache");
 199 #endif
 200                 modprobe_r("vfat");
 201                 modprobe_r("fat");
 202                 modprobe_r("fuse");
 203 #ifdef TCONFIG_SAMBASRV
 204                 modprobe_r("hfs");
 205                 modprobe_r("hfsplus");
 206 #endif
 207                 sleep(1);
 208 #ifdef TCONFIG_SAMBASRV
 209                 modprobe_r("nls_cp437");
 210                 modprobe_r("nls_cp850");
 211                 modprobe_r("nls_cp852");
 212                 modprobe_r("nls_cp866");
 213 #ifdef LINUX26
 214                 modprobe_r("nls_cp932");
 215                 modprobe_r("nls_cp936");
 216                 modprobe_r("nls_cp949");
 217                 modprobe_r("nls_cp950");
 218 #endif
 219 #endif
 220                 modprobe_r(USBSTORAGE_MOD);
 221                 modprobe_r(SD_MOD);
 222 #ifdef LINUX26
 223                 modprobe_r(SCSI_WAIT_MOD);
 224 #endif
 225                 modprobe_r(SCSI_MOD);
 226         }
 227
 228         if (disabled || nvram_get_int("usb_ohci") != 1) modprobe_r(USBOHCI_MOD);
 229         if (disabled || nvram_get_int("usb_uhci") != 1) modprobe_r(USBUHCI_MOD);
 230         if (disabled || nvram_get_int("usb_usb2") != 1) modprobe_r(USB20_MOD);
 231
 232 #ifdef LINUX26
 233         modprobe_r("leds-usb");
 234         modprobe_r("ledtrig-usbdev");
 235         led(LED_USB, LED_OFF);
 236 #endif
 237
 238         // only unload core modules if usb is disabled
 239         if (disabled) {
 240                 umount("/proc/bus/usb"); // unmount usb device filesystem
 241                 modprobe_r(USBOHCI_MOD);
 242                 modprobe_r(USBUHCI_MOD);
 243                 modprobe_r(USB20_MOD);
 244                 modprobe_r(USBCORE_MOD);
 245         }
 246
 247 #ifdef LINUX26
 248         if (nvram_get_int("idle_enable") == 0) {
 249                 killall("sd-idle", SIGTERM);
 250         }
 251
 252 #ifdef TCONFIG_UPS
 253         stop_ups();
 254 #endif
 255
 256         if (nvram_match("3g_usb", "0") ) {
 257                 if (nvram_match("3g_module", "sierra") ) {
 258                         modprobe_r("sierra");
 259                         modprobe_r("usbserial");
 260                 }
 261
 262                 if (nvram_match("3g_module", "option") ) {
 263                         modprobe_r("option");
 264                         modprobe_r("usbserial");
 265                 }
 266 /*
 267                 // shibby
 268                 // when modem use usbserial module and we will try remove module, module will crash
 269                 // the only solution at the moment is reboot router
 270                 // FIX THIS
 271                 if (nvram_match("3g_module", "usbserial") ) {
 272                         modprobe_r("usbserial");
 273                 }
 274 */
 275         }
 276 #endif
 277
 278 }
 279
 280
 281 #define MOUNT_VAL_FAIL  0
 282 #define MOUNT_VAL_RONLY 1
 283 #define MOUNT_VAL_RW    2
 284 #define MOUNT_VAL_EXIST 3
 285
 286 int mount_r(char *mnt_dev, char *mnt_dir, char *type)
 287 {
 288         struct mntent *mnt;
 289         int ret;
 290         char options[140];
 291         char flagfn[128];
 292         int dir_made;
 293
 294         if ((mnt = findmntents(mnt_dev, 0, NULL, 0))) {
 295                 syslog(LOG_INFO, "USB partition at %s already mounted on %s",
 296                         mnt_dev, mnt->mnt_dir);
 297                 return MOUNT_VAL_EXIST;
 298         }
 299
 300         options[0] = 0;
 301
 302         if (type) {
 303                 unsigned long flags = MS_NOATIME | MS_NODEV;
 304
 305                 if (strcmp(type, "swap") == 0 || strcmp(type, "mbr") == 0) {
 306                         /* not a mountable partition */
 307                         flags = 0;
 308                 }
 309                 else if (strcmp(type, "ext2") == 0 || strcmp(type, "ext3") == 0) {
 310                         if (nvram_invmatch("usb_ext_opt", ""))
 311                                 sprintf(options, nvram_safe_get("usb_ext_opt"));
 312                 }
 313                 else if (strcmp(type, "vfat") == 0) {
 314                         if (nvram_invmatch("smbd_cset", ""))
 315                                 sprintf(options, "iocharset=%s%s",
 316                                         isdigit(nvram_get("smbd_cset")[0]) ? "cp" : "",
 317                                                 nvram_get("smbd_cset"));
 318                         if (nvram_invmatch("smbd_cpage", "")) {
 319                                 char *cp = nvram_safe_get("smbd_cpage");
 320                                 sprintf(options + strlen(options), ",codepage=%s" + (options[0] ? 0 : 1), cp);
 321                                 sprintf(flagfn, "nls_cp%s", cp);
 322
 323                                 cp = nvram_get("smbd_nlsmod");
 324                                 if ((cp) && (*cp != 0) && (strcmp(cp, flagfn) != 0))
 325                                         modprobe_r(cp);
 326
 327                                 modprobe(flagfn);
 328                                 nvram_set("smbd_nlsmod", flagfn);
 329                         }
 330                         sprintf(options + strlen(options), ",shortname=winnt" + (options[0] ? 0 : 1));
 331 #ifdef LINUX26
 332                         sprintf(options + strlen(options), ",flush" + (options[0] ? 0 : 1));
 333 #endif
 334                         if (nvram_invmatch("usb_fat_opt", ""))
 335                                 sprintf(options + strlen(options), "%s%s", options[0] ? "," : "", nvram_safe_get("usb_fat_opt"));
 336                 }
 337                 else if (strncmp(type, "ntfs", 4) == 0) {
 338                         if (nvram_invmatch("smbd_cset", ""))
 339                                 sprintf(options, "iocharset=%s%s",
 340                                         isdigit(nvram_get("smbd_cset")[0]) ? "cp" : "",
 341                                                 nvram_get("smbd_cset"));
 342                         if (nvram_invmatch("usb_ntfs_opt", ""))
 343                                 sprintf(options + strlen(options), "%s%s", options[0] ? "," : "", nvram_safe_get("usb_ntfs_opt"));
 344                 }
 345
 346                 if (flags) {
 347                         if ((dir_made = mkdir_if_none(mnt_dir))) {
 348                                 /* Create the flag file for remove the directory on dismount. */
 349                                 sprintf(flagfn, "%s/.autocreated-dir", mnt_dir);
 350                                 f_write(flagfn, NULL, 0, 0, 0);
 351                         }
 352
 353                         ret = mount(mnt_dev, mnt_dir, type, flags, options[0] ? options : "");
 354
 355                         /* try ntfs-3g in case it's installed */
 356                         if (ret != 0 && strncmp(type, "ntfs", 4) == 0) {
 357                                 sprintf(options + strlen(options), ",noatime,nodev" + (options[0] ? 0 : 1));
 358 #ifdef TCONFIG_NTFS
 359                                 if (nvram_get_int("usb_fs_ntfs"))
 360 #endif
 361                                         ret = eval("ntfs-3g", "-o", options, mnt_dev, mnt_dir);
 362                         }
 363
 364 #ifdef TCONFIG_HFS
 365                         if (ret != 0 && strncmp(type, "hfs", "") == 0) {
 366                                 ret = eval("mount", "-o", "noatime,nodev", mnt_dev, mnt_dir);
 367                         }
 368
 369                         if (ret != 0 && strncmp(type, "hfsplus", "") == 0) {
 370                                 ret = eval("mount", "-o", "noatime,nodev", mnt_dev, mnt_dir);
 371                         }
 372 #endif
 373
 374                         if (ret != 0) /* give it another try - guess fs */
 375                                 ret = eval("mount", "-o", "noatime,nodev", mnt_dev, mnt_dir);
 376
 377                         if (ret == 0) {
 378                                 syslog(LOG_INFO, "USB %s%s fs at %s mounted on %s",
 379                                         type, (flags & MS_RDONLY) ? " (ro)" : "", mnt_dev, mnt_dir);
 380                                 return (flags & MS_RDONLY) ? MOUNT_VAL_RONLY : MOUNT_VAL_RW;
 381                         }
 382
 383                         if (dir_made) {
 384                                 unlink(flagfn);
 385                                 rmdir(mnt_dir);
 386                         }
 387                 }
 388         }
 389         return MOUNT_VAL_FAIL;
 390 }
 391
 392
 393 struct mntent *mount_fstab(char *dev_name, char *type, char *label, char *uuid)
 394 {
 395         struct mntent *mnt = NULL;
 396 #if 0
 397         if (eval("mount", "-a") == 0)
 398                 mnt = findmntents(dev_name, 0, NULL, 0);
 399 #else
 400         char spec[PATH_MAX+1];
 401
 402         if (label && *label) {
 403                 sprintf(spec, "LABEL=%s", label);
 404                 if (eval("mount", spec) == 0)
 405                         mnt = findmntents(dev_name, 0, NULL, 0);
 406         }
 407
 408         if (!mnt && uuid && *uuid) {
 409                 sprintf(spec, "UUID=%s", uuid);
 410                 if (eval("mount", spec) == 0)
 411                         mnt = findmntents(dev_name, 0, NULL, 0);
 412         }
 413
 414         if (!mnt) {
 415                 if (eval("mount", dev_name) == 0)
 416                         mnt = findmntents(dev_name, 0, NULL, 0);
 417         }
 418
 419         if (!mnt) {
 420                 /* Still did not find what we are looking for, try absolute path */
 421                 if (realpath(dev_name, spec)) {
 422                         if (eval("mount", spec) == 0)
 423                                 mnt = findmntents(dev_name, 0, NULL, 0);
 424                 }
 425         }
 426 #endif
 427
 428         if (mnt)
 429                 syslog(LOG_INFO, "USB %s fs at %s mounted on %s", type, dev_name, mnt->mnt_dir);
 430         return (mnt);
 431 }
 432
 433
 434 /* Check if the UFD is still connected because the links created in /dev/discs
 435  * are not removed when the UFD is  unplugged.
 436  * The file to read is: /proc/scsi/usb-storage-#/#, where # is the host no.
 437  * We are looking for "Attached: Yes".
 438  */
 439 static int usb_ufd_connected(int host_no)
 440 {
 441         char proc_file[128];
 442 #ifndef LINUX26
 443         char line[256];
 444 #endif
 445         FILE *fp;
 446
 447         sprintf(proc_file, "%s/%s-%d/%d", PROC_SCSI_ROOT, USB_STORAGE, host_no, host_no);
 448         fp = fopen(proc_file, "r");
 449
 450         if (!fp) {
 451                 /* try the way it's implemented in newer kernels: /proc/scsi/usb-storage/[host] */
 452                 sprintf(proc_file, "%s/%s/%d", PROC_SCSI_ROOT, USB_STORAGE, host_no);
 453                 fp = fopen(proc_file, "r");
 454         }
 455
 456         if (fp) {
 457 #ifdef LINUX26
 458                 fclose(fp);
 459                 return 1;
 460 #else
 461                 while (fgets(line, sizeof(line), fp) != NULL) {
 462                         if (strstr(line, "Attached: Yes")) {
 463                                 fclose(fp);
 464                                 return 1;
 465                         }
 466                 }
 467                 fclose(fp);
 468 #endif
 469         }
 470
 471         return 0;
 472 }
 473
 474
 475 #ifndef MNT_DETACH
 476 #define MNT_DETACH      0x00000002      /* from linux/fs.h - just detach from the tree */
 477 #endif
 478 int umount_mountpoint(struct mntent *mnt, uint flags);
 479 int uswap_mountpoint(struct mntent *mnt, uint flags);
 480
 481 /* Unmount this partition from all its mountpoints.  Note that it may
 482  * actually be mounted several times, either with different names or
 483  * with "-o bind" flag.
 484  * If the special flagfile is now revealed, delete it and [attempt to] delete
 485  * the directory.
 486  */
 487 int umount_partition(char *dev_name, int host_num, char *dsc_name, char *pt_name, uint flags)
 488 {
 489         sync(); /* This won't matter if the device is unplugged, though. */
 490
 491         if (flags & EFH_HUNKNOWN) {
 492                 /* EFH_HUNKNOWN flag is passed if the host was unknown.
 493                  * Only unmount disconnected drives in this case.
 494                  */
 495                 if (usb_ufd_connected(host_num))
 496                         return 0;
 497         }
 498
 499         /* Find all the active swaps that are on this device and stop them. */
 500         findmntents(dev_name, 1, uswap_mountpoint, flags);
 501
 502         /* Find all the mountpoints that are for this device and unmount them. */
 503         findmntents(dev_name, 0, umount_mountpoint, flags);
 504         return 0;
 505 }
 506
 507 int uswap_mountpoint(struct mntent *mnt, uint flags)
 508 {
 509         swapoff(mnt->mnt_fsname);
 510         return 0;
 511 }
 512
 513 int umount_mountpoint(struct mntent *mnt, uint flags)
 514 {
 515         int ret = 1, count;
 516         char flagfn[128];
 517
 518         sprintf(flagfn, "%s/.autocreated-dir", mnt->mnt_dir);
 519
 520         /* Run user pre-unmount scripts if any. It might be too late if
 521          * the drive has been disconnected, but we'll try it anyway.
 522          */
 523         if (nvram_get_int("usb_automount"))
 524                 run_nvscript("script_usbumount", mnt->mnt_dir, 3);
 525         /* Run *.autostop scripts located in the root of the partition being unmounted if any. */
 526         run_userfile(mnt->mnt_dir, ".autostop", mnt->mnt_dir, 5);
 527         run_nvscript("script_autostop", mnt->mnt_dir, 5);
 528
 529         count = 0;
 530         while ((ret = umount(mnt->mnt_dir)) && (count < 2)) {
 531                 count++;
 532                 /* If we could not unmount the drive on the 1st try,
 533                  * kill all NAS applications so they are not keeping the device busy -
 534                  * unless it's an unmount request from the Web GUI.
 535                  */
 536                 if ((count == 1) && ((flags & EFH_USER) == 0))
 537                         restart_nas_services(1, 0);
 538                 sleep(1);
 539         }
 540
 541         if (ret == 0)
 542                 syslog(LOG_INFO, "USB partition unmounted from %s", mnt->mnt_dir);
 543
 544         if (ret && ((flags & EFH_SHUTDN) != 0)) {
 545                 /* If system is stopping (not restarting), and we couldn't unmount the
 546                  * partition, try to remount it as read-only. Ignore the return code -
 547                  * we can still try to do a lazy unmount.
 548                  */
 549                 eval("mount", "-o", "remount,ro", mnt->mnt_dir);
 550         }
 551
 552         if (ret && ((flags & EFH_USER) == 0)) {
 553                 /* Make one more try to do a lazy unmount unless it's an unmount
 554                  * request from the Web GUI.
 555                  * MNT_DETACH will expose the underlying mountpoint directory to all
 556                  * except whatever has cd'ed to the mountpoint (thereby making it busy).
 557                  * So the unmount can't actually fail. It disappears from the ken of
 558                  * everyone else immediately, and from the ken of whomever is keeping it
 559                  * busy when they move away from it. And then it disappears for real.
 560                  */
 561                 ret = umount2(mnt->mnt_dir, MNT_DETACH);
 562                 syslog(LOG_INFO, "USB partition busy - will unmount ASAP from %s", mnt->mnt_dir);
 563         }
 564
 565         if (ret == 0) {
 566                 if ((unlink(flagfn) == 0)) {
 567                         // Only delete the directory if it was auto-created
 568                         rmdir(mnt->mnt_dir);
 569                 }
 570         }
 571         return (ret == 0);
 572 }
 573
 574
 575 /* Mount this partition on this disc.
 576  * If the device is already mounted on any mountpoint, don't mount it again.
 577  * If this is a swap partition, try swapon -a.
 578  * If this is a regular partition, try mount -a.
 579  *
 580  * Before we mount any partitions:
 581  *      If the type is swap and /etc/fstab exists, do "swapon -a"
 582  *      If /etc/fstab exists, try mounting using fstab.
 583  *  We delay invoking mount because mount will probe all the partitions
 584  *      to read the labels, and we don't want it to do that early on.
 585  *  We don't invoke swapon until we actually find a swap partition.
 586  *
 587  * If the mount succeeds, execute the *.autorun scripts in the top
 588  * directory of the newly mounted partition.
 589  * Returns NZ for success, 0 if we did not mount anything.
 590  */
 591 int mount_partition(char *dev_name, int host_num, char *dsc_name, char *pt_name, uint flags)
 592 {
 593         char the_label[128], mountpoint[128], uuid[40];
 594         int ret;
 595         char *type, *p;
 596         static char *swp_argv[] = { "swapon", "-a", NULL };
 597         struct mntent *mnt;
 598
 599         if ((type = find_label_or_uuid(dev_name, the_label, uuid)) == NULL)
 600                 return 0;
 601
 602         if (f_exists("/etc/fstab")) {
 603                 if (strcmp(type, "swap") == 0) {
 604                         _eval(swp_argv, NULL, 0, NULL);
 605                         return 0;
 606                 }
 607
 608                 if (mount_r(dev_name, NULL, NULL) == MOUNT_VAL_EXIST)
 609                         return 0;
 610
 611                 if ((mnt = mount_fstab(dev_name, type, the_label, uuid))) {
 612                         strcpy(mountpoint, mnt->mnt_dir);
 613                         ret = MOUNT_VAL_RW;
 614                         goto done;
 615                 }
 616         }
 617
 618         if (*the_label != 0) {
 619                 for (p = the_label; *p; p++) {
 620                         if (!isalnum(*p) && !strchr("+-&.@", *p))
 621                                 *p = '_';
 622                 }
 623                 sprintf(mountpoint, "%s/%s", MOUNT_ROOT, the_label);
 624                 if ((ret = mount_r(dev_name, mountpoint, type)))
 625                         goto done;
 626         }
 627
 628         /* Can't mount to /mnt/LABEL, so try mounting to /mnt/discDN_PN */
 629         sprintf(mountpoint, "%s/%s", MOUNT_ROOT, pt_name);
 630         ret = mount_r(dev_name, mountpoint, type);
 631 done:
 632         if (ret == MOUNT_VAL_RONLY || ret == MOUNT_VAL_RW)
 633         {
 634                 /* Run user *.autorun and post-mount scripts if any. */
 635                 run_userfile(mountpoint, ".autorun", mountpoint, 3);
 636                 if (nvram_get_int("usb_automount"))
 637                         run_nvscript("script_usbmount", mountpoint, 3);
 638         }
 639         return (ret == MOUNT_VAL_RONLY || ret == MOUNT_VAL_RW);
 640 }
 641
 642
 643 #if 0 /* LINUX26 */
 644
 645 /*
 646  * Finds SCSI Host number. Returns the host number >=0 if found, or (-1) otherwise.
 647  * The name and host number of scsi block device in kernel 2.6 (for attached devices) can be found as
 648  *      /sys($DEVPATH)/host<host_no>/target<*>/<id>/block:[sda|sdb|...]
 649  * where $DEVPATH is passed to hotplug events, and looks like
 650  *      /devices/pci0000:00/0000:00:04.1/usb1/1-1/1-1:1.2
 651  *
 652  * For printers this function finds a minor assigned to a printer
 653  *      /sys($DEVPATH)/usb:lp[0|1|2|...]
 654  */
 655 int find_dev_host(const char *devpath)
 656 {
 657         DIR *usb_devpath;
 658         struct dirent *dp;
 659         char buf[256];
 660         int host = -1;  /* Scsi Host */
 661
 662         sprintf(buf, "/sys%s", devpath);
 663         if ((usb_devpath = opendir(buf))) {
 664                 while ((dp = readdir(usb_devpath))) {
 665                         errno = 0;
 666                         if (strncmp(dp->d_name, "host", 4) == 0) {
 667                                 host = strtol(dp->d_name + 4, (char **)NULL, 10);
 668                                 if (errno)
 669                                         host = -1;
 670                                 else
 671                                         break;
 672                         }
 673                         else if (strncmp(dp->d_name, "usb:lp", 6) == 0) {
 674                                 host = strtol(dp->d_name + 6, (char **)NULL, 10);
 675                                 if (errno)
 676                                         host = -1;
 677                                 else
 678                                         break;
 679                         }
 680                         else
 681                                 continue;
 682                 }
 683                 closedir(usb_devpath);
 684         }
 685         return (host);
 686 }
 687
 688 #endif  /* LINUX26 */
 689
 690 int dir_is_mountpoint(const char *root, const char *dir)
 691 {
 692         char path[256];
 693         struct stat sb;
 694         int thisdev;
 695
 696         snprintf(path, sizeof(path), "%s%s%s", root ? : "", root ? "/" : "", dir);
 697
 698         /* Check if this is a directory */
 699         sb.st_mode = S_IFDIR;   /* failsafe */
 700         stat(path, &sb);
 701
 702         if (S_ISDIR(sb.st_mode)) {
 703
 704                 /* If this dir & its parent dir are on the same device, it is not a mountpoint */
 705                 strcat(path, "/.");
 706                 stat(path, &sb);
 707                 thisdev = sb.st_dev;
 708                 strcat(path, ".");
 709                 ++sb.st_dev;    /* failsafe */
 710                 stat(path, &sb);
 711
 712                 return (thisdev != sb.st_dev);
 713         }
 714
 715         return 0;
 716 }
 717
 718 /* Mount or unmount all partitions on this controller.
 719  * Parameter: action_add:
 720  * 0  = unmount
 721  * >0 = mount only if automount config option is enabled.
 722  * <0 = mount regardless of config option.
 723  */
 724 void hotplug_usb_storage_device(int host_no, int action_add, uint flags)
 725 {
 726         if (!nvram_get_int("usb_enable"))
 727                 return;
 728         _dprintf("%s: host %d action: %d\n", __FUNCTION__, host_no, action_add);
 729
 730         if (action_add) {
 731                 if (nvram_get_int("usb_storage") && (nvram_get_int("usb_automount") || action_add < 0)) {
 732                         /* Do not probe the device here. It's either initiated by user,
 733                          * or hotplug_usb() already did.
 734                          */
 735                         if (exec_for_host(host_no, 0x00, flags, mount_partition)) {
 736                                 restart_nas_services(0, 1); // restart all NAS applications
 737                         }
 738                 }
 739         }
 740         else {
 741                 if (nvram_get_int("usb_storage") || ((flags & EFH_USER) == 0)) {
 742                         /* When unplugged, unmount the device even if
 743                          * usb storage is disabled in the GUI.
 744                          */
 745                         exec_for_host(host_no, (flags & EFH_USER) ? 0x00 : 0x02, flags, umount_partition);
 746                         /* Restart NAS applications (they could be killed by umount_mountpoint),
 747                          * or just re-read the configuration.
 748                          */
 749                         restart_nas_services(0, 1);
 750                 }
 751         }
 752 }
 753
 754
 755 /* This gets called at reboot or upgrade.  The system is stopping. */
 756 void remove_storage_main(int shutdn)
 757 {
 758         if (shutdn)
 759                 restart_nas_services(1, 0);
 760         /* Unmount all partitions */
 761         exec_for_host(-1, 0x02, shutdn ? EFH_SHUTDN : 0, umount_partition);
 762 }
 763
 764
 765 /*******
 766  * All the complex locking & checking code was removed when the kernel USB-storage
 767  * bugs were fixed.
 768  * The crash bug was with overlapped I/O to different USB drives, not specifically
 769  * with mount processing.
 770  *
 771  * And for USB devices that are slow to come up.  The kernel now waits until the
 772  * USB drive has settled, and it correctly reads the partition table before calling
 773  * the hotplug agent.
 774  *
 775  * The kernel patch was cleaning up data structures on an unplug.  It
 776  * needs to wait until the disk is unmounted.  We have 20 seconds to do
 777  * the unmounts.
 778  *******/
 779
 780
 781 /* Plugging or removing usb device
 782  *
 783  * On an occurrance, multiple hotplug events may be fired off.
 784  * For example, if a hub is plugged or unplugged, an event
 785  * will be generated for everything downstream of it, plus one for
 786  * the hub itself.  These are fired off simultaneously, not serially.
 787  * This means that many many hotplug processes will be running at
 788  * the same time.
 789  *
 790  * The hotplug event generated by the kernel gives us several pieces
 791  * of information:
 792  * PRODUCT is vendorid/productid/rev#.
 793  * DEVICE is /proc/bus/usb/bus#/dev#
 794  * ACTION is add or remove
 795  * SCSI_HOST is the host (controller) number (this relies on the custom kernel patch)
 796  *
 797  * Note that when we get a hotplug add event, the USB susbsystem may
 798  * or may not have yet tried to read the partition table of the
 799  * device.  For a new controller that has never been seen before,
 800  * generally yes.  For a re-plug of a controller that has been seen
 801  * before, generally no.
 802  *
 803  * On a remove, the partition info has not yet been expunged.  The
 804  * partitions show up as /dev/discs/disc#/part#, and /proc/partitions.
 805  * It appears that doing a "stat" for a non-existant partition will
 806  * causes the kernel to re-validate the device and update the
 807  * partition table info.  However, it won't re-validate if the disc is
 808  * mounted--you'll get a "Device busy for revalidation (usage=%d)" in
 809  * syslog.
 810  *
 811  * The $INTERFACE is "class/subclass/protocol"
 812  * Some interesting classes:
 813  *      8 = mass storage
 814  *      7 = printer
 815  *      3 = HID.   3/1/2 = mouse.
 816  *      6 = still image (6/1/1 = Digital camera Camera)
 817  *      9 = Hub
 818  *      255 = scanner (255/255/255)
 819  *
 820  * Observed:
 821  *      Hub seems to have no INTERFACE (null), and TYPE of "9/0/0"
 822  *      Flash disk seems to have INTERFACE of "8/6/80", and TYPE of "0/0/0"
 823  *
 824  * When a hub is unplugged, a hotplug event is generated for it and everything
 825  * downstream from it.  You cannot depend on getting these events in any
 826  * particular order, since there will be many hotplug programs all fired off
 827  * at almost the same time.
 828  * On a remove, don't try to access the downstream devices right away, give the
 829  * kernel time to finish cleaning up all the data structures, which will be
 830  * in the process of being torn down.
 831  *
 832  * On the initial plugin, the first time the kernel usb-storage subsystem sees
 833  * the host (identified by GUID), it automatically reads the partition table.
 834  * On subsequent plugins, it does not.
 835  *
 836  * Special values for Web Administration to unmount or remount
 837  * all partitions of the host:
 838  *      INTERFACE=TOMATO/...
 839  *      ACTION=add/remove
 840  *      SCSI_HOST=<host_no>
 841  * If host_no is negative, we unmount all partions of *all* hosts.
 842  */
 843 void hotplug_usb(void)
 844 {
 845         int add;
 846         int host = -1;
 847         char *interface = getenv("INTERFACE");
 848         char *action = getenv("ACTION");
 849         char *product = getenv("PRODUCT");
 850 #ifdef LINUX26
 851         char *device = getenv("DEVICENAME");
 852         int is_block = strcmp(getenv("SUBSYSTEM") ? : "", "block") == 0;
 853 #else
 854         char *device = getenv("DEVICE");
 855 #endif
 856         char *scsi_host = getenv("SCSI_HOST");
 857
 858         _dprintf("%s hotplug INTERFACE=%s ACTION=%s PRODUCT=%s HOST=%s DEVICE=%s\n",
 859                 getenv("SUBSYSTEM") ? : "USB", interface, action, product, scsi_host, device);
 860
 861         if (!nvram_get_int("usb_enable")) return;
 862 #ifdef LINUX26
 863         if (!action || ((!interface || !product) && !is_block))
 864 #else
 865         if (!interface || !action || !product)  /* Hubs bail out here. */
 866 #endif
 867                 return;
 868
 869         if (scsi_host)
 870                 host = atoi(scsi_host);
 871
 872         if (!wait_action_idle(10)) return;
 873
 874         add = (strcmp(action, "add") == 0);
 875         if (add && (strncmp(interface ? : "", "TOMATO/", 7) != 0)) {
 876 #ifdef LINUX26
 877                 if (!is_block && device)
 878 #endif
 879                 syslog(LOG_DEBUG, "Attached USB device %s [INTERFACE=%s PRODUCT=%s]",
 880                         device, interface, product);
 881 #ifndef LINUX26
 882                 /* To allow automount to be blocked on startup.
 883                  * In kernel 2.6 we still need to serialize mount/umount calls -
 884                  * so the lock is down below in the "block" hotplug processing.
 885                  */
 886                 file_unlock(file_lock("usb"));
 887 #endif
 888         }
 889
 890         if (strncmp(interface ? : "", "TOMATO/", 7) == 0) {     /* web admin */
 891                 if (scsi_host == NULL)
 892                         host = atoi(product);   // for backward compatibility
 893                 /* If host is negative, unmount all partitions of *all* hosts.
 894                  * If host == -1, execute "soft" unmount (do not kill NAS apps, no "lazy" umount).
 895                  * If host == -2, run "hard" unmount, as if the drive is unplugged.
 896                  * This feature can be used in custom scripts as following:
 897                  *
 898                  * # INTERFACE=TOMATO/1 ACTION=remove PRODUCT=-1 SCSI_HOST=-1 hotplug usb
 899                  *
 900                  * PRODUCT is required to pass the env variables verification.
 901                  */
 902                 /* Unmount or remount all partitions of the host. */
 903                 hotplug_usb_storage_device(host < 0 ? -1 : host, add ? -1 : 0,
 904                         host == -2 ? 0 : EFH_USER);
 905         }
 906 #ifdef LINUX26
 907         else if (is_block && strcmp(getenv("MAJOR") ? : "", "8") == 0 && strcmp(getenv("PHYSDEVBUS") ? : "", "scsi") == 0) {
 908                 /* scsi partition */
 909                 char devname[64];
 910                 int lock;
 911
 912                 sprintf(devname, "/dev/%s", device);
 913                 lock = file_lock("usb");
 914                 if (add) {
 915                         if (nvram_get_int("usb_storage") && nvram_get_int("usb_automount")) {
 916                                 int minor = atoi(getenv("MINOR") ? : "0");
 917                                 if ((minor % 16) == 0 && !is_no_partition(device)) {
 918                                         /* This is a disc, and not a "no-partition" device,
 919                                          * like APPLE iPOD shuffle. We can't mount it.
 920                                          */
 921                                         return;
 922                                 }
 923                                 if (mount_partition(devname, host, NULL, device, EFH_HP_ADD)) {
 924                                         restart_nas_services(0, 1); // restart all NAS applications
 925                                 }
 926                         }
 927                 }
 928                 else {
 929                         /* When unplugged, unmount the device even if usb storage is disabled in the GUI */
 930                         umount_partition(devname, host, NULL, device, EFH_HP_REMOVE);
 931                         /* Restart NAS applications (they could be killed by umount_mountpoint),
 932                          * or just re-read the configuration.
 933                          */
 934                         restart_nas_services(0, 1);
 935                 }
 936                 file_unlock(lock);
 937         }
 938 #endif
 939         else if (strncmp(interface ? : "", "8/", 2) == 0) {     /* usb storage */
 940                 run_nvscript("script_usbhotplug", NULL, 2);
 941 #ifndef LINUX26
 942                 hotplug_usb_storage_device(host, add, (add ? EFH_HP_ADD : EFH_HP_REMOVE) | (host < 0 ? EFH_HUNKNOWN : 0));
 943 #endif
 944         }
 945         else {  /* It's some other type of USB device, not storage. */
 946 #ifdef LINUX26
 947                 if (is_block) return;
 948 #endif
 949                 /* Do nothing.  The user's hotplug script must do it all. */
 950                 run_nvscript("script_usbhotplug", NULL, 2);
 951         }
 952 }
 953