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("/proc/leds-usb/gpio_pin", param, 0, 0);
 103                 }
 104 #endif
 105                 if (nvram_get_int("usb_storage")) {
 106                         /* insert scsi and storage modules before usb drivers */
 107                         modprobe(SCSI_MOD);
 108 #ifdef LINUX26
 109                         modprobe(SCSI_WAIT_MOD);
 110 #endif
 111                         modprobe(SD_MOD);
 112                         modprobe(USBSTORAGE_MOD);
 113
 114                         if (nvram_get_int("usb_fs_ext3")) {
 115 #ifdef LINUX26
 116                                 modprobe("mbcache");    // used by ext2/ext3
 117 #endif
 118                                 /* insert ext3 first so that lazy mount tries ext3 before ext2 */
 119                                 modprobe("jbd");
 120                                 modprobe("ext3");
 121                                 modprobe("ext2");
 122                         }
 123
 124                         if (nvram_get_int("usb_fs_fat")) {
 125                                 modprobe("fat");
 126                                 modprobe("vfat");
 127                         }
 128
 129                         if (nvram_get_int("usb_fs_hfs")) {
 130                                 modprobe("hfs");
 131                         }
 132
 133                         if (nvram_get_int("usb_fs_hfsplus")) {
 134                                 modprobe("hfsplus");
 135                         }
 136
 137 #if defined(LINUX26) && defined(TCONFIG_USB_EXTRAS)
 138                         if (nvram_get_int("usb_mmc") == 1) {
 139                                 /* insert SD/MMC modules if present */
 140                                 modprobe("mmc_core");
 141                                 modprobe("mmc_block");
 142                                 modprobe("sdhci");
 143                         }
 144 #endif
 145                 }
 146
 147                 /* if enabled, force USB2 before USB1.1 */
 148                 if (nvram_get_int("usb_usb2") == 1) {
 149                         i = nvram_get_int("usb_irq_thresh");
 150                         if ((i < 0) || (i > 6))
 151                                 i = 0;
 152                         sprintf(param, "log2_irq_thresh=%d", i);
 153                         modprobe(USB20_MOD, param);
 154                 }
 155
 156                 if (nvram_get_int("usb_uhci") == 1) {
 157                         modprobe(USBUHCI_MOD);
 158                 }
 159
 160                 if (nvram_get_int("usb_ohci") == 1) {
 161                         modprobe(USBOHCI_MOD);
 162                 }
 163
 164                 if (nvram_get_int("usb_printer")) {
 165                         symlink("/dev/usb", "/dev/printers");
 166                         modprobe(USBPRINTER_MOD);
 167
 168                         /* start printer server only if not already running */
 169                         if (p9100d_sig(0) != 0) {
 170                                 eval("p910nd",
 171                                 nvram_get_int("usb_printer_bidirect") ? "-b" : "", //bidirectional
 172                                 "-f", "/dev/usb/lp0", // device
 173                                 "0" // listen port
 174                                 );
 175                         }
 176                 }
 177
 178 #ifdef LINUX26
 179                 if (nvram_get_int("idle_enable") == 1) {
 180                         xstart( "sd-idle" );
 181                 }
 182 #endif
 183         }
 184 }
 185
 186 void stop_usb(void)
 187 {
 188         int disabled = !nvram_get_int("usb_enable");
 189
 190         // only find and kill the printer server we started (port 0)
 191         p9100d_sig(SIGTERM);
 192         modprobe_r(USBPRINTER_MOD);
 193
 194         // only stop storage services if disabled
 195         if (disabled || !nvram_get_int("usb_storage")) {
 196                 // Unmount all partitions
 197                 remove_storage_main(0);
 198
 199                 // Stop storage services
 200                 modprobe_r("ext2");
 201                 modprobe_r("ext3");
 202                 modprobe_r("jbd");
 203 #ifdef LINUX26
 204                 modprobe_r("mbcache");
 205 #endif
 206                 modprobe_r("vfat");
 207                 modprobe_r("fat");
 208                 modprobe_r("fuse");
 209                 modprobe_r("hfs");
 210                 modprobe_r("hfsplus");
 211                 sleep(1);
 212 #ifdef TCONFIG_SAMBASRV
 213                 modprobe_r("nls_cp437");
 214                 modprobe_r("nls_cp850");
 215                 modprobe_r("nls_cp852");
 216                 modprobe_r("nls_cp866");
 217 #ifdef LINUX26
 218                 modprobe_r("nls_cp932");
 219                 modprobe_r("nls_cp936");
 220                 modprobe_r("nls_cp949");
 221                 modprobe_r("nls_cp950");
 222 #endif
 223 #endif
 224                 modprobe_r(USBSTORAGE_MOD);
 225                 modprobe_r(SD_MOD);
 226 #ifdef LINUX26
 227                 modprobe_r(SCSI_WAIT_MOD);
 228 #endif
 229                 modprobe_r(SCSI_MOD);
 230         }
 231
 232 #if defined(LINUX26) && defined(TCONFIG_USB_EXTRAS)
 233         if (disabled || !nvram_get_int("usb_storage") || nvram_get_int("usb_mmc") != 1) {
 234                 modprobe_r("sdhci");
 235                 modprobe_r("mmc_block");
 236                 modprobe_r("mmc_core");
 237         }
 238 #endif
 239
 240         if (disabled || nvram_get_int("usb_ohci") != 1) modprobe_r(USBOHCI_MOD);
 241         if (disabled || nvram_get_int("usb_uhci") != 1) modprobe_r(USBUHCI_MOD);
 242         if (disabled || nvram_get_int("usb_usb2") != 1) modprobe_r(USB20_MOD);
 243
 244 #ifdef LINUX26
 245         modprobe_r("leds-usb");
 246         modprobe_r("ledtrig-usbdev");
 247         led(LED_USB, LED_OFF);
 248 #endif
 249
 250         // only unload core modules if usb is disabled
 251         if (disabled) {
 252                 umount("/proc/bus/usb"); // unmount usb device filesystem
 253                 modprobe_r(USBOHCI_MOD);
 254                 modprobe_r(USBUHCI_MOD);
 255                 modprobe_r(USB20_MOD);
 256                 modprobe_r(USBCORE_MOD);
 257         }
 258
 259 #ifdef LINUX26
 260         if (nvram_get_int("idle_enable") == 0) {
 261                 killall("sd-idle", SIGTERM);
 262         }
 263
 264         if (nvram_match("3g_usb", "0") ) {
 265                 if (nvram_match("3g_module", "sierra") ) {
 266                         modprobe_r("sierra");
 267                         modprobe_r("usbserial");
 268                 }
 269                 if (nvram_match("3g_module", "option") ) {
 270                         modprobe_r("option");
 271                         modprobe_r("usbserial");
 272                 }
 273                 // shibby
 274                 // when modem use usbserial module and we will try remove module, module will crash
 275                 // the only solution at the moment is rebbot router
 276                 // FIX THIS
 277         }
 278 #endif
 279 }
 280
 281
 282 #define MOUNT_VAL_FAIL  0
 283 #define MOUNT_VAL_RONLY 1
 284 #define MOUNT_VAL_RW    2
 285 #define MOUNT_VAL_EXIST 3
 286
 287 int mount_r(char *mnt_dev, char *mnt_dir, char *type)
 288 {
 289         struct mntent *mnt;
 290         int ret;
 291         char options[140];
 292         char flagfn[128];
 293         int dir_made;
 294
 295         if ((mnt = findmntents(mnt_dev, 0, NULL, 0))) {
 296                 syslog(LOG_INFO, "USB partition at %s already mounted on %s",
 297                         mnt_dev, mnt->mnt_dir);
 298                 return MOUNT_VAL_EXIST;
 299         }
 300
 301         options[0] = 0;
 302
 303         if (type) {
 304                 unsigned long flags = MS_NOATIME | MS_NODEV;
 305
 306                 if (strcmp(type, "swap") == 0 || strcmp(type, "mbr") == 0) {
 307                         /* not a mountable partition */
 308                         flags = 0;
 309                 }
 310                 else if (strcmp(type, "ext2") == 0 || strcmp(type, "ext3") == 0) {
 311                         if (nvram_invmatch("usb_ext_opt", ""))
 312                                 sprintf(options, nvram_safe_get("usb_ext_opt"));
 313                 }
 314                 else if (strcmp(type, "vfat") == 0) {
 315                         if (nvram_invmatch("smbd_cset", ""))
 316                                 sprintf(options, "iocharset=%s%s",
 317                                         isdigit(nvram_get("smbd_cset")[0]) ? "cp" : "",
 318                                                 nvram_get("smbd_cset"));
 319                         if (nvram_invmatch("smbd_cpage", "")) {
 320                                 char *cp = nvram_safe_get("smbd_cpage");
 321                                 sprintf(options + strlen(options), ",codepage=%s" + (options[0] ? 0 : 1), cp);
 322                                 sprintf(flagfn, "nls_cp%s", cp);
 323
 324                                 cp = nvram_get("smbd_nlsmod");
 325                                 if ((cp) && (*cp != 0) && (strcmp(cp, flagfn) != 0))
 326                                         modprobe_r(cp);
 327
 328                                 modprobe(flagfn);
 329                                 nvram_set("smbd_nlsmod", flagfn);
 330                         }
 331                         sprintf(options + strlen(options), ",shortname=winnt" + (options[0] ? 0 : 1));
 332 #ifdef LINUX26
 333                         sprintf(options + strlen(options), ",flush" + (options[0] ? 0 : 1));
 334 #endif
 335                         if (nvram_invmatch("usb_fat_opt", ""))
 336                                 sprintf(options + strlen(options), "%s%s", options[0] ? "," : "", nvram_safe_get("usb_fat_opt"));
 337                 }
 338                 else if (strncmp(type, "ntfs", 4) == 0) {
 339                         if (nvram_invmatch("smbd_cset", ""))
 340                                 sprintf(options, "iocharset=%s%s",
 341                                         isdigit(nvram_get("smbd_cset")[0]) ? "cp" : "",
 342                                                 nvram_get("smbd_cset"));
 343                         if (nvram_invmatch("usb_ntfs_opt", ""))
 344                                 sprintf(options + strlen(options), "%s%s", options[0] ? "," : "", nvram_safe_get("usb_ntfs_opt"));
 345                 }
 346
 347                 if (flags) {
 348                         if ((dir_made = mkdir_if_none(mnt_dir))) {
 349                                 /* Create the flag file for remove the directory on dismount. */
 350                                 sprintf(flagfn, "%s/.autocreated-dir", mnt_dir);
 351                                 f_write(flagfn, NULL, 0, 0, 0);
 352                         }
 353
 354                         ret = mount(mnt_dev, mnt_dir, type, flags, options[0] ? options : "");
 355
 356                         /* try ntfs-3g in case it's installed */
 357                         if (ret != 0 && strncmp(type, "ntfs", 4) == 0) {
 358                                 sprintf(options + strlen(options), ",noatime,nodev" + (options[0] ? 0 : 1));
 359 #ifdef TCONFIG_NTFS
 360                                 if (nvram_get_int("usb_fs_ntfs"))
 361 #endif
 362                                         ret = eval("ntfs-3g", "-o", options, mnt_dev, mnt_dir);
 363                         }
 364
 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
 373                         if (ret != 0) /* give it another try - guess fs */
 374                                 ret = eval("mount", "-o", "noatime,nodev", mnt_dev, mnt_dir);
 375
 376                         if (ret == 0) {
 377                                 syslog(LOG_INFO, "USB %s%s fs at %s mounted on %s",
 378                                         type, (flags & MS_RDONLY) ? " (ro)" : "", mnt_dev, mnt_dir);
 379                                 return (flags & MS_RDONLY) ? MOUNT_VAL_RONLY : MOUNT_VAL_RW;
 380                         }
 381
 382                         if (dir_made) {
 383                                 unlink(flagfn);
 384                                 rmdir(mnt_dir);
 385                         }
 386                 }
 387         }
 388         return MOUNT_VAL_FAIL;
 389 }
 390
 391
 392 struct mntent *mount_fstab(char *dev_name, char *type, char *label, char *uuid)
 393 {
 394         struct mntent *mnt = NULL;
 395 #if 0
 396         if (eval("mount", "-a") == 0)
 397                 mnt = findmntents(dev_name, 0, NULL, 0);
 398 #else
 399         char spec[PATH_MAX+1];
 400
 401         if (label && *label) {
 402                 sprintf(spec, "LABEL=%s", label);
 403                 if (eval("mount", spec) == 0)
 404                         mnt = findmntents(dev_name, 0, NULL, 0);
 405         }
 406
 407         if (!mnt && uuid && *uuid) {
 408                 sprintf(spec, "UUID=%s", uuid);
 409                 if (eval("mount", spec) == 0)
 410                         mnt = findmntents(dev_name, 0, NULL, 0);
 411         }
 412
 413         if (!mnt) {
 414                 if (eval("mount", dev_name) == 0)
 415                         mnt = findmntents(dev_name, 0, NULL, 0);
 416         }
 417
 418         if (!mnt) {
 419                 /* Still did not find what we are looking for, try absolute path */
 420                 if (realpath(dev_name, spec)) {
 421                         if (eval("mount", spec) == 0)
 422                                 mnt = findmntents(dev_name, 0, NULL, 0);
 423                 }
 424         }
 425 #endif
 426
 427         if (mnt)
 428                 syslog(LOG_INFO, "USB %s fs at %s mounted on %s", type, dev_name, mnt->mnt_dir);
 429         return (mnt);
 430 }
 431
 432
 433 /* Check if the UFD is still connected because the links created in /dev/discs
 434  * are not removed when the UFD is  unplugged.
 435  * The file to read is: /proc/scsi/usb-storage-#/#, where # is the host no.
 436  * We are looking for "Attached: Yes".
 437  */
 438 static int usb_ufd_connected(int host_no)
 439 {
 440         char proc_file[128];
 441 #ifndef LINUX26
 442         char line[256];
 443 #endif
 444         FILE *fp;
 445
 446         sprintf(proc_file, "%s/%s-%d/%d", PROC_SCSI_ROOT, USB_STORAGE, host_no, host_no);
 447         fp = fopen(proc_file, "r");
 448
 449         if (!fp) {
 450                 /* try the way it's implemented in newer kernels: /proc/scsi/usb-storage/[host] */
 451                 sprintf(proc_file, "%s/%s/%d", PROC_SCSI_ROOT, USB_STORAGE, host_no);
 452                 fp = fopen(proc_file, "r");
 453         }
 454
 455         if (fp) {
 456 #ifdef LINUX26
 457                 fclose(fp);
 458                 return 1;
 459 #else
 460                 while (fgets(line, sizeof(line), fp) != NULL) {
 461                         if (strstr(line, "Attached: Yes")) {
 462                                 fclose(fp);
 463                                 return 1;
 464                         }
 465                 }
 466                 fclose(fp);
 467 #endif
 468         }
 469
 470         return 0;
 471 }
 472
 473
 474 #ifndef MNT_DETACH
 475 #define MNT_DETACH      0x00000002      /* from linux/fs.h - just detach from the tree */
 476 #endif
 477 int umount_mountpoint(struct mntent *mnt, uint flags);
 478 int uswap_mountpoint(struct mntent *mnt, uint flags);
 479
 480 /* Unmount this partition from all its mountpoints.  Note that it may
 481  * actually be mounted several times, either with different names or
 482  * with "-o bind" flag.
 483  * If the special flagfile is now revealed, delete it and [attempt to] delete
 484  * the directory.
 485  */
 486 int umount_partition(char *dev_name, int host_num, char *dsc_name, char *pt_name, uint flags)
 487 {
 488         sync(); /* This won't matter if the device is unplugged, though. */
 489
 490         if (flags & EFH_HUNKNOWN) {
 491                 /* EFH_HUNKNOWN flag is passed if the host was unknown.
 492                  * Only unmount disconnected drives in this case.
 493                  */
 494                 if (usb_ufd_connected(host_num))
 495                         return 0;
 496         }
 497
 498         /* Find all the active swaps that are on this device and stop them. */
 499         findmntents(dev_name, 1, uswap_mountpoint, flags);
 500
 501         /* Find all the mountpoints that are for this device and unmount them. */
 502         findmntents(dev_name, 0, umount_mountpoint, flags);
 503         return 0;
 504 }
 505
 506 int uswap_mountpoint(struct mntent *mnt, uint flags)
 507 {
 508         swapoff(mnt->mnt_fsname);
 509         return 0;
 510 }
 511
 512 int umount_mountpoint(struct mntent *mnt, uint flags)
 513 {
 514         int ret = 1, count;
 515         char flagfn[128];
 516
 517         sprintf(flagfn, "%s/.autocreated-dir", mnt->mnt_dir);
 518
 519         /* Run user pre-unmount scripts if any. It might be too late if
 520          * the drive has been disconnected, but we'll try it anyway.
 521          */
 522         if (nvram_get_int("usb_automount"))
 523                 run_nvscript("script_usbumount", mnt->mnt_dir, 3);
 524         /* Run *.autostop scripts located in the root of the partition being unmounted if any. */
 525         run_userfile(mnt->mnt_dir, ".autostop", mnt->mnt_dir, 5);
 526         run_nvscript("script_autostop", mnt->mnt_dir, 5);
 527
 528         count = 0;
 529         while ((ret = umount(mnt->mnt_dir)) && (count < 2)) {
 530                 count++;
 531                 /* If we could not unmount the drive on the 1st try,
 532                  * kill all NAS applications so they are not keeping the device busy -
 533                  * unless it's an unmount request from the Web GUI.
 534                  */
 535                 if ((count == 1) && ((flags & EFH_USER) == 0))
 536                         restart_nas_services(1, 0);
 537                 sleep(1);
 538         }
 539
 540         if (ret == 0)
 541                 syslog(LOG_INFO, "USB partition unmounted from %s", mnt->mnt_dir);
 542
 543         if (ret && ((flags & EFH_SHUTDN) != 0)) {
 544                 /* If system is stopping (not restarting), and we couldn't unmount the
 545                  * partition, try to remount it as read-only. Ignore the return code -
 546                  * we can still try to do a lazy unmount.
 547                  */
 548                 eval("mount", "-o", "remount,ro", mnt->mnt_dir);
 549         }
 550
 551         if (ret && ((flags & EFH_USER) == 0)) {
 552                 /* Make one more try to do a lazy unmount unless it's an unmount
 553                  * request from the Web GUI.
 554                  * MNT_DETACH will expose the underlying mountpoint directory to all
 555                  * except whatever has cd'ed to the mountpoint (thereby making it busy).
 556                  * So the unmount can't actually fail. It disappears from the ken of
 557                  * everyone else immediately, and from the ken of whomever is keeping it
 558                  * busy when they move away from it. And then it disappears for real.
 559                  */
 560                 ret = umount2(mnt->mnt_dir, MNT_DETACH);
 561                 syslog(LOG_INFO, "USB partition busy - will unmount ASAP from %s", mnt->mnt_dir);
 562         }
 563
 564         if (ret == 0) {
 565                 if ((unlink(flagfn) == 0)) {
 566                         // Only delete the directory if it was auto-created
 567                         rmdir(mnt->mnt_dir);
 568                 }
 569         }
 570         return (ret == 0);
 571 }
 572
 573
 574 /* Mount this partition on this disc.
 575  * If the device is already mounted on any mountpoint, don't mount it again.
 576  * If this is a swap partition, try swapon -a.
 577  * If this is a regular partition, try mount -a.
 578  *
 579  * Before we mount any partitions:
 580  *      If the type is swap and /etc/fstab exists, do "swapon -a"
 581  *      If /etc/fstab exists, try mounting using fstab.
 582  *  We delay invoking mount because mount will probe all the partitions
 583  *      to read the labels, and we don't want it to do that early on.
 584  *  We don't invoke swapon until we actually find a swap partition.
 585  *
 586  * If the mount succeeds, execute the *.autorun scripts in the top
 587  * directory of the newly mounted partition.
 588  * Returns NZ for success, 0 if we did not mount anything.
 589  */
 590 int mount_partition(char *dev_name, int host_num, char *dsc_name, char *pt_name, uint flags)
 591 {
 592         char the_label[128], mountpoint[128], uuid[40];
 593         int ret;
 594         char *type, *p;
 595         static char *swp_argv[] = { "swapon", "-a", NULL };
 596         struct mntent *mnt;
 597
 598         if ((type = find_label_or_uuid(dev_name, the_label, uuid)) == NULL)
 599                 return 0;
 600
 601         if (f_exists("/etc/fstab")) {
 602                 if (strcmp(type, "swap") == 0) {
 603                         _eval(swp_argv, NULL, 0, NULL);
 604                         return 0;
 605                 }
 606
 607                 if (mount_r(dev_name, NULL, NULL) == MOUNT_VAL_EXIST)
 608                         return 0;
 609
 610                 if ((mnt = mount_fstab(dev_name, type, the_label, uuid))) {
 611                         strcpy(mountpoint, mnt->mnt_dir);
 612                         ret = MOUNT_VAL_RW;
 613                         goto done;
 614                 }
 615         }
 616
 617         if (*the_label != 0) {
 618                 for (p = the_label; *p; p++) {
 619                         if (!isalnum(*p) && !strchr("+-&.@", *p))
 620                                 *p = '_';
 621                 }
 622                 sprintf(mountpoint, "%s/%s", MOUNT_ROOT, the_label);
 623                 if ((ret = mount_r(dev_name, mountpoint, type)))
 624                         goto done;
 625         }
 626
 627         /* Can't mount to /mnt/LABEL, so try mounting to /mnt/discDN_PN */
 628         sprintf(mountpoint, "%s/%s", MOUNT_ROOT, pt_name);
 629         ret = mount_r(dev_name, mountpoint, type);
 630 done:
 631         if (ret == MOUNT_VAL_RONLY || ret == MOUNT_VAL_RW)
 632         {
 633                 /* Run user *.autorun and post-mount scripts if any. */
 634                 run_userfile(mountpoint, ".autorun", mountpoint, 3);
 635                 if (nvram_get_int("usb_automount"))
 636                         run_nvscript("script_usbmount", mountpoint, 3);
 637         }
 638         return (ret == MOUNT_VAL_RONLY || ret == MOUNT_VAL_RW);
 639 }
 640
 641
 642 #if 0 /* LINUX26 */
 643
 644 /*
 645  * Finds SCSI Host number. Returns the host number >=0 if found, or (-1) otherwise.
 646  * The name and host number of scsi block device in kernel 2.6 (for attached devices) can be found as
 647  *      /sys($DEVPATH)/host<host_no>/target<*>/<id>/block:[sda|sdb|...]
 648  * where $DEVPATH is passed to hotplug events, and looks like
 649  *      /devices/pci0000:00/0000:00:04.1/usb1/1-1/1-1:1.2
 650  *
 651  * For printers this function finds a minor assigned to a printer
 652  *      /sys($DEVPATH)/usb:lp[0|1|2|...]
 653  */
 654 int find_dev_host(const char *devpath)
 655 {
 656         DIR *usb_devpath;
 657         struct dirent *dp;
 658         char buf[256];
 659         int host = -1;  /* Scsi Host */
 660
 661         sprintf(buf, "/sys%s", devpath);
 662         if ((usb_devpath = opendir(buf))) {
 663                 while ((dp = readdir(usb_devpath))) {
 664                         errno = 0;
 665                         if (strncmp(dp->d_name, "host", 4) == 0) {
 666                                 host = strtol(dp->d_name + 4, (char **)NULL, 10);
 667                                 if (errno)
 668                                         host = -1;
 669                                 else
 670                                         break;
 671                         }
 672                         else if (strncmp(dp->d_name, "usb:lp", 6) == 0) {
 673                                 host = strtol(dp->d_name + 6, (char **)NULL, 10);
 674                                 if (errno)
 675                                         host = -1;
 676                                 else
 677                                         break;
 678                         }
 679                         else
 680                                 continue;
 681                 }
 682                 closedir(usb_devpath);
 683         }
 684         return (host);
 685 }
 686
 687 #endif  /* LINUX26 */
 688
 689 int dir_is_mountpoint(const char *root, const char *dir)
 690 {
 691         char path[256];
 692         struct stat sb;
 693         int thisdev;
 694
 695         snprintf(path, sizeof(path), "%s%s%s", root ? : "", root ? "/" : "", dir);
 696
 697         /* Check if this is a directory */
 698         sb.st_mode = S_IFDIR;   /* failsafe */
 699         stat(path, &sb);
 700
 701         if (S_ISDIR(sb.st_mode)) {
 702
 703                 /* If this dir & its parent dir are on the same device, it is not a mountpoint */
 704                 strcat(path, "/.");
 705                 stat(path, &sb);
 706                 thisdev = sb.st_dev;
 707                 strcat(path, ".");
 708                 ++sb.st_dev;    /* failsafe */
 709                 stat(path, &sb);
 710
 711                 return (thisdev != sb.st_dev);
 712         }
 713
 714         return 0;
 715 }
 716
 717 /* Mount or unmount all partitions on this controller.
 718  * Parameter: action_add:
 719  * 0  = unmount
 720  * >0 = mount only if automount config option is enabled.
 721  * <0 = mount regardless of config option.
 722  */
 723 void hotplug_usb_storage_device(int host_no, int action_add, uint flags)
 724 {
 725         if (!nvram_get_int("usb_enable"))
 726                 return;
 727         _dprintf("%s: host %d action: %d\n", __FUNCTION__, host_no, action_add);
 728
 729         if (action_add) {
 730                 if (nvram_get_int("usb_storage") && (nvram_get_int("usb_automount") || action_add < 0)) {
 731                         /* Do not probe the device here. It's either initiated by user,
 732                          * or hotplug_usb() already did.
 733                          */
 734                         if (exec_for_host(host_no, 0x00, flags, mount_partition)) {
 735                                 restart_nas_services(0, 1); // restart all NAS applications
 736                         }
 737                 }
 738         }
 739         else {
 740                 if (nvram_get_int("usb_storage") || ((flags & EFH_USER) == 0)) {
 741                         /* When unplugged, unmount the device even if
 742                          * usb storage is disabled in the GUI.
 743                          */
 744                         exec_for_host(host_no, (flags & EFH_USER) ? 0x00 : 0x02, flags, umount_partition);
 745                         /* Restart NAS applications (they could be killed by umount_mountpoint),
 746                          * or just re-read the configuration.
 747                          */
 748                         restart_nas_services(0, 1);
 749                 }
 750         }
 751 }
 752
 753
 754 /* This gets called at reboot or upgrade.  The system is stopping. */
 755 void remove_storage_main(int shutdn)
 756 {
 757         if (shutdn)
 758                 restart_nas_services(1, 0);
 759         /* Unmount all partitions */
 760         exec_for_host(-1, 0x02, shutdn ? EFH_SHUTDN : 0, umount_partition);
 761 }
 762
 763
 764 /*******
 765  * All the complex locking & checking code was removed when the kernel USB-storage
 766  * bugs were fixed.
 767  * The crash bug was with overlapped I/O to different USB drives, not specifically
 768  * with mount processing.
 769  *
 770  * And for USB devices that are slow to come up.  The kernel now waits until the
 771  * USB drive has settled, and it correctly reads the partition table before calling
 772  * the hotplug agent.
 773  *
 774  * The kernel patch was cleaning up data structures on an unplug.  It
 775  * needs to wait until the disk is unmounted.  We have 20 seconds to do
 776  * the unmounts.
 777  *******/
 778
 779 #ifdef LINUX26
 780 static inline void usbled_proc(char *device, int add)
 781 {
 782         char *p;
 783         char param[32];
 784
 785         if (do_led(LED_USB, LED_PROBE) != 255) {
 786                 strncpy(param, device, sizeof(param));
 787                 if ((p = strchr(param, ':')) != NULL)
 788                         *p = 0;
 789
 790                 /* verify if we need to ignore this device (i.e. an internal SD/MMC slot ) */
 791                 p = nvram_safe_get("usb_noled");
 792                 if (strcmp(p, param) == 0)
 793                         return;
 794
 795                 f_write_string(add ? "/proc/leds-usb/add" : "/proc/leds-usb/remove", param, 0, 0);
 796         }
 797 }
 798 #endif
 799
 800 /* Plugging or removing usb device
 801  *
 802  * On an occurrance, multiple hotplug events may be fired off.
 803  * For example, if a hub is plugged or unplugged, an event
 804  * will be generated for everything downstream of it, plus one for
 805  * the hub itself.  These are fired off simultaneously, not serially.
 806  * This means that many many hotplug processes will be running at
 807  * the same time.
 808  *
 809  * The hotplug event generated by the kernel gives us several pieces
 810  * of information:
 811  * PRODUCT is vendorid/productid/rev#.
 812  * DEVICE is /proc/bus/usb/bus#/dev#
 813  * ACTION is add or remove
 814  * SCSI_HOST is the host (controller) number (this relies on the custom kernel patch)
 815  *
 816  * Note that when we get a hotplug add event, the USB susbsystem may
 817  * or may not have yet tried to read the partition table of the
 818  * device.  For a new controller that has never been seen before,
 819  * generally yes.  For a re-plug of a controller that has been seen
 820  * before, generally no.
 821  *
 822  * On a remove, the partition info has not yet been expunged.  The
 823  * partitions show up as /dev/discs/disc#/part#, and /proc/partitions.
 824  * It appears that doing a "stat" for a non-existant partition will
 825  * causes the kernel to re-validate the device and update the
 826  * partition table info.  However, it won't re-validate if the disc is
 827  * mounted--you'll get a "Device busy for revalidation (usage=%d)" in
 828  * syslog.
 829  *
 830  * The $INTERFACE is "class/subclass/protocol"
 831  * Some interesting classes:
 832  *      8 = mass storage
 833  *      7 = printer
 834  *      3 = HID.   3/1/2 = mouse.
 835  *      6 = still image (6/1/1 = Digital camera Camera)
 836  *      9 = Hub
 837  *      255 = scanner (255/255/255)
 838  *
 839  * Observed:
 840  *      Hub seems to have no INTERFACE (null), and TYPE of "9/0/0"
 841  *      Flash disk seems to have INTERFACE of "8/6/80", and TYPE of "0/0/0"
 842  *
 843  * When a hub is unplugged, a hotplug event is generated for it and everything
 844  * downstream from it.  You cannot depend on getting these events in any
 845  * particular order, since there will be many hotplug programs all fired off
 846  * at almost the same time.
 847  * On a remove, don't try to access the downstream devices right away, give the
 848  * kernel time to finish cleaning up all the data structures, which will be
 849  * in the process of being torn down.
 850  *
 851  * On the initial plugin, the first time the kernel usb-storage subsystem sees
 852  * the host (identified by GUID), it automatically reads the partition table.
 853  * On subsequent plugins, it does not.
 854  *
 855  * Special values for Web Administration to unmount or remount
 856  * all partitions of the host:
 857  *      INTERFACE=TOMATO/...
 858  *      ACTION=add/remove
 859  *      SCSI_HOST=<host_no>
 860  * If host_no is negative, we unmount all partions of *all* hosts.
 861  */
 862 void hotplug_usb(void)
 863 {
 864         int add;
 865         int host = -1;
 866         char *interface = getenv("INTERFACE");
 867         char *action = getenv("ACTION");
 868         char *product = getenv("PRODUCT");
 869 #ifdef LINUX26
 870         char *device = getenv("DEVICENAME");
 871         int is_block = strcmp(getenv("SUBSYSTEM") ? : "", "block") == 0;
 872 #else
 873         char *device = getenv("DEVICE");
 874 #endif
 875         char *scsi_host = getenv("SCSI_HOST");
 876
 877         _dprintf("%s hotplug INTERFACE=%s ACTION=%s PRODUCT=%s HOST=%s DEVICE=%s\n",
 878                 getenv("SUBSYSTEM") ? : "USB", interface, action, product, scsi_host, device);
 879
 880         if (!nvram_get_int("usb_enable")) return;
 881 #ifdef LINUX26
 882         if (!action || ((!interface || !product) && !is_block))
 883 #else
 884         if (!interface || !action || !product)  /* Hubs bail out here. */
 885 #endif
 886                 return;
 887
 888         if (scsi_host)
 889                 host = atoi(scsi_host);
 890
 891         if (!wait_action_idle(10)) return;
 892
 893         add = (strcmp(action, "add") == 0);
 894         if (add && (strncmp(interface ? : "", "TOMATO/", 7) != 0)) {
 895 #ifdef LINUX26
 896                 if (!is_block && device)
 897 #endif
 898                 syslog(LOG_DEBUG, "Attached USB device %s [INTERFACE=%s PRODUCT=%s]",
 899                         device, interface, product);
 900 #ifndef LINUX26
 901                 /* To allow automount to be blocked on startup.
 902                  * In kernel 2.6 we still need to serialize mount/umount calls -
 903                  * so the lock is down below in the "block" hotplug processing.
 904                  */
 905                 file_unlock(file_lock("usb"));
 906 #endif
 907         }
 908
 909         if (strncmp(interface ? : "", "TOMATO/", 7) == 0) {     /* web admin */
 910                 if (scsi_host == NULL)
 911                         host = atoi(product);   // for backward compatibility
 912                 /* If host is negative, unmount all partitions of *all* hosts.
 913                  * If host == -1, execute "soft" unmount (do not kill NAS apps, no "lazy" umount).
 914                  * If host == -2, run "hard" unmount, as if the drive is unplugged.
 915                  * This feature can be used in custom scripts as following:
 916                  *
 917                  * # INTERFACE=TOMATO/1 ACTION=remove PRODUCT=-1 SCSI_HOST=-1 hotplug usb
 918                  *
 919                  * PRODUCT is required to pass the env variables verification.
 920                  */
 921                 /* Unmount or remount all partitions of the host. */
 922                 hotplug_usb_storage_device(host < 0 ? -1 : host, add ? -1 : 0,
 923                         host == -2 ? 0 : EFH_USER);
 924         }
 925 #ifdef LINUX26
 926         else if (is_block && strcmp(getenv("MAJOR") ? : "", "8") == 0 && strcmp(getenv("PHYSDEVBUS") ? : "", "scsi") == 0) {
 927                 /* scsi partition */
 928                 char devname[64];
 929                 int lock;
 930
 931                 sprintf(devname, "/dev/%s", device);
 932                 lock = file_lock("usb");
 933                 if (add) {
 934                         if (nvram_get_int("usb_storage") && nvram_get_int("usb_automount")) {
 935                                 int minor = atoi(getenv("MINOR") ? : "0");
 936                                 if ((minor % 16) == 0 && !is_no_partition(device)) {
 937                                         /* This is a disc, and not a "no-partition" device,
 938                                          * like APPLE iPOD shuffle. We can't mount it.
 939                                          */
 940                                         return;
 941                                 }
 942                                 if (mount_partition(devname, host, NULL, device, EFH_HP_ADD)) {
 943                                         restart_nas_services(0, 1); // restart all NAS applications
 944                                 }
 945                         }
 946                 }
 947                 else {
 948                         /* When unplugged, unmount the device even if usb storage is disabled in the GUI */
 949                         umount_partition(devname, host, NULL, device, EFH_HP_REMOVE);
 950                         /* Restart NAS applications (they could be killed by umount_mountpoint),
 951                          * or just re-read the configuration.
 952                          */
 953                         restart_nas_services(0, 1);
 954                 }
 955                 file_unlock(lock);
 956         }
 957 #endif
 958         else if (strncmp(interface ? : "", "8/", 2) == 0) {     /* usb storage */
 959 #ifdef LINUX26
 960                 usbled_proc(device, add);
 961 #endif
 962                 run_nvscript("script_usbhotplug", NULL, 2);
 963 #ifndef LINUX26
 964                 hotplug_usb_storage_device(host, add, (add ? EFH_HP_ADD : EFH_HP_REMOVE) | (host < 0 ? EFH_HUNKNOWN : 0));
 965 #endif
 966         }
 967         else {  /* It's some other type of USB device, not storage. */
 968 #ifdef LINUX26
 969                 if (is_block) return;
 970 #endif
 971 #ifdef LINUX26
 972                 if (strncmp(interface ? : "", "7/", 2) == 0)    /* printer */
 973                         usbled_proc(device, add);
 974 #endif
 975                 /* Do nothing.  The user's hotplug script must do it all. */
 976                 run_nvscript("script_usbhotplug", NULL, 2);
 977         }
 978 }
 979