1/* 2 * Copyright (C) 1997-1998 Mark Lord 3 * Copyright (C) 2003 Red Hat 4 * 5 * Some code was moved here from ide.c, see it for original copyrights. 6 */ 7 8/* 9 * This is the /proc/ide/ filesystem implementation. 10 * 11 * Drive/Driver settings can be retrieved by reading the drive's 12 * "settings" files. e.g. "cat /proc/ide0/hda/settings" 13 * To write a new value "val" into a specific setting "name", use: 14 * echo "name:val" >/proc/ide/ide0/hda/settings 15 */ 16 17#include <linux/module.h> 18 19#include <asm/uaccess.h> 20#include <linux/errno.h> 21#include <linux/proc_fs.h> 22#include <linux/stat.h> 23#include <linux/mm.h> 24#include <linux/pci.h> 25#include <linux/ctype.h> 26#include <linux/ide.h> 27#include <linux/seq_file.h> 28#include <linux/slab.h> 29 30#include <asm/io.h> 31 32static struct proc_dir_entry *proc_ide_root; 33 34static int ide_imodel_proc_show(struct seq_file *m, void *v) 35{ 36 ide_hwif_t *hwif = (ide_hwif_t *) m->private; 37 const char *name; 38 39 switch (hwif->chipset) { 40 case ide_generic: name = "generic"; break; 41 case ide_pci: name = "pci"; break; 42 case ide_cmd640: name = "cmd640"; break; 43 case ide_dtc2278: name = "dtc2278"; break; 44 case ide_ali14xx: name = "ali14xx"; break; 45 case ide_qd65xx: name = "qd65xx"; break; 46 case ide_umc8672: name = "umc8672"; break; 47 case ide_ht6560b: name = "ht6560b"; break; 48 case ide_4drives: name = "4drives"; break; 49 case ide_pmac: name = "mac-io"; break; 50 case ide_au1xxx: name = "au1xxx"; break; 51 case ide_palm3710: name = "palm3710"; break; 52 case ide_acorn: name = "acorn"; break; 53 default: name = "(unknown)"; break; 54 } 55 seq_printf(m, "%s\n", name); 56 return 0; 57} 58 59static int ide_imodel_proc_open(struct inode *inode, struct file *file) 60{ 61 return single_open(file, ide_imodel_proc_show, PDE(inode)->data); 62} 63 64static const struct file_operations ide_imodel_proc_fops = { 65 .owner = THIS_MODULE, 66 .open = ide_imodel_proc_open, 67 .read = seq_read, 68 .llseek = seq_lseek, 69 .release = single_release, 70}; 71 72static int ide_mate_proc_show(struct seq_file *m, void *v) 73{ 74 ide_hwif_t *hwif = (ide_hwif_t *) m->private; 75 76 if (hwif && hwif->mate) 77 seq_printf(m, "%s\n", hwif->mate->name); 78 else 79 seq_printf(m, "(none)\n"); 80 return 0; 81} 82 83static int ide_mate_proc_open(struct inode *inode, struct file *file) 84{ 85 return single_open(file, ide_mate_proc_show, PDE(inode)->data); 86} 87 88static const struct file_operations ide_mate_proc_fops = { 89 .owner = THIS_MODULE, 90 .open = ide_mate_proc_open, 91 .read = seq_read, 92 .llseek = seq_lseek, 93 .release = single_release, 94}; 95 96static int ide_channel_proc_show(struct seq_file *m, void *v) 97{ 98 ide_hwif_t *hwif = (ide_hwif_t *) m->private; 99 100 seq_printf(m, "%c\n", hwif->channel ? '1' : '0'); 101 return 0; 102} 103 104static int ide_channel_proc_open(struct inode *inode, struct file *file) 105{ 106 return single_open(file, ide_channel_proc_show, PDE(inode)->data); 107} 108 109static const struct file_operations ide_channel_proc_fops = { 110 .owner = THIS_MODULE, 111 .open = ide_channel_proc_open, 112 .read = seq_read, 113 .llseek = seq_lseek, 114 .release = single_release, 115}; 116 117static int ide_identify_proc_show(struct seq_file *m, void *v) 118{ 119 ide_drive_t *drive = (ide_drive_t *)m->private; 120 u8 *buf; 121 122 if (!drive) { 123 seq_putc(m, '\n'); 124 return 0; 125 } 126 127 buf = kmalloc(SECTOR_SIZE, GFP_KERNEL); 128 if (!buf) 129 return -ENOMEM; 130 if (taskfile_lib_get_identify(drive, buf) == 0) { 131 __le16 *val = (__le16 *)buf; 132 int i; 133 134 for (i = 0; i < SECTOR_SIZE / 2; i++) { 135 seq_printf(m, "%04x%c", le16_to_cpu(val[i]), 136 (i % 8) == 7 ? '\n' : ' '); 137 } 138 } else 139 seq_putc(m, buf[0]); 140 kfree(buf); 141 return 0; 142} 143 144static int ide_identify_proc_open(struct inode *inode, struct file *file) 145{ 146 return single_open(file, ide_identify_proc_show, PDE(inode)->data); 147} 148 149static const struct file_operations ide_identify_proc_fops = { 150 .owner = THIS_MODULE, 151 .open = ide_identify_proc_open, 152 .read = seq_read, 153 .llseek = seq_lseek, 154 .release = single_release, 155}; 156 157/** 158 * ide_find_setting - find a specific setting 159 * @st: setting table pointer 160 * @name: setting name 161 * 162 * Scan's the setting table for a matching entry and returns 163 * this or NULL if no entry is found. The caller must hold the 164 * setting semaphore 165 */ 166 167static 168const struct ide_proc_devset *ide_find_setting(const struct ide_proc_devset *st, 169 char *name) 170{ 171 while (st->name) { 172 if (strcmp(st->name, name) == 0) 173 break; 174 st++; 175 } 176 return st->name ? st : NULL; 177} 178 179/** 180 * ide_read_setting - read an IDE setting 181 * @drive: drive to read from 182 * @setting: drive setting 183 * 184 * Read a drive setting and return the value. The caller 185 * must hold the ide_setting_mtx when making this call. 186 * 187 * BUGS: the data return and error are the same return value 188 * so an error -EINVAL and true return of the same value cannot 189 * be told apart 190 */ 191 192static int ide_read_setting(ide_drive_t *drive, 193 const struct ide_proc_devset *setting) 194{ 195 const struct ide_devset *ds = setting->setting; 196 int val = -EINVAL; 197 198 if (ds->get) 199 val = ds->get(drive); 200 201 return val; 202} 203 204 205static int ide_write_setting(ide_drive_t *drive, 206 const struct ide_proc_devset *setting, int val) 207{ 208 const struct ide_devset *ds = setting->setting; 209 210 if (!capable(CAP_SYS_ADMIN)) 211 return -EACCES; 212 if (!ds->set) 213 return -EPERM; 214 if ((ds->flags & DS_SYNC) 215 && (val < setting->min || val > setting->max)) 216 return -EINVAL; 217 return ide_devset_execute(drive, ds, val); 218} 219 220ide_devset_get(xfer_rate, current_speed); 221 222static int set_xfer_rate (ide_drive_t *drive, int arg) 223{ 224 struct ide_cmd cmd; 225 226 if (arg < XFER_PIO_0 || arg > XFER_UDMA_6) 227 return -EINVAL; 228 229 memset(&cmd, 0, sizeof(cmd)); 230 cmd.tf.command = ATA_CMD_SET_FEATURES; 231 cmd.tf.feature = SETFEATURES_XFER; 232 cmd.tf.nsect = (u8)arg; 233 cmd.valid.out.tf = IDE_VALID_FEATURE | IDE_VALID_NSECT; 234 cmd.valid.in.tf = IDE_VALID_NSECT; 235 cmd.tf_flags = IDE_TFLAG_SET_XFER; 236 237 return ide_no_data_taskfile(drive, &cmd); 238} 239 240ide_devset_rw(current_speed, xfer_rate); 241ide_devset_rw_field(init_speed, init_speed); 242ide_devset_rw_flag(nice1, IDE_DFLAG_NICE1); 243ide_devset_rw_field(number, dn); 244 245static const struct ide_proc_devset ide_generic_settings[] = { 246 IDE_PROC_DEVSET(current_speed, 0, 70), 247 IDE_PROC_DEVSET(init_speed, 0, 70), 248 IDE_PROC_DEVSET(io_32bit, 0, 1 + (SUPPORT_VLB_SYNC << 1)), 249 IDE_PROC_DEVSET(keepsettings, 0, 1), 250 IDE_PROC_DEVSET(nice1, 0, 1), 251 IDE_PROC_DEVSET(number, 0, 3), 252 IDE_PROC_DEVSET(pio_mode, 0, 255), 253 IDE_PROC_DEVSET(unmaskirq, 0, 1), 254 IDE_PROC_DEVSET(using_dma, 0, 1), 255 { NULL }, 256}; 257 258static void proc_ide_settings_warn(void) 259{ 260 printk_once(KERN_WARNING "Warning: /proc/ide/hd?/settings interface is " 261 "obsolete, and will be removed soon!\n"); 262} 263 264static int ide_settings_proc_show(struct seq_file *m, void *v) 265{ 266 const struct ide_proc_devset *setting, *g, *d; 267 const struct ide_devset *ds; 268 ide_drive_t *drive = (ide_drive_t *) m->private; 269 int rc, mul_factor, div_factor; 270 271 proc_ide_settings_warn(); 272 273 mutex_lock(&ide_setting_mtx); 274 g = ide_generic_settings; 275 d = drive->settings; 276 seq_printf(m, "name\t\t\tvalue\t\tmin\t\tmax\t\tmode\n"); 277 seq_printf(m, "----\t\t\t-----\t\t---\t\t---\t\t----\n"); 278 while (g->name || (d && d->name)) { 279 /* read settings in the alphabetical order */ 280 if (g->name && d && d->name) { 281 if (strcmp(d->name, g->name) < 0) 282 setting = d++; 283 else 284 setting = g++; 285 } else if (d && d->name) { 286 setting = d++; 287 } else 288 setting = g++; 289 mul_factor = setting->mulf ? setting->mulf(drive) : 1; 290 div_factor = setting->divf ? setting->divf(drive) : 1; 291 seq_printf(m, "%-24s", setting->name); 292 rc = ide_read_setting(drive, setting); 293 if (rc >= 0) 294 seq_printf(m, "%-16d", rc * mul_factor / div_factor); 295 else 296 seq_printf(m, "%-16s", "write-only"); 297 seq_printf(m, "%-16d%-16d", (setting->min * mul_factor + div_factor - 1) / div_factor, setting->max * mul_factor / div_factor); 298 ds = setting->setting; 299 if (ds->get) 300 seq_printf(m, "r"); 301 if (ds->set) 302 seq_printf(m, "w"); 303 seq_printf(m, "\n"); 304 } 305 mutex_unlock(&ide_setting_mtx); 306 return 0; 307} 308 309static int ide_settings_proc_open(struct inode *inode, struct file *file) 310{ 311 return single_open(file, ide_settings_proc_show, PDE(inode)->data); 312} 313 314#define MAX_LEN 30 315 316static ssize_t ide_settings_proc_write(struct file *file, const char __user *buffer, 317 size_t count, loff_t *pos) 318{ 319 ide_drive_t *drive = (ide_drive_t *) PDE(file->f_path.dentry->d_inode)->data; 320 char name[MAX_LEN + 1]; 321 int for_real = 0, mul_factor, div_factor; 322 unsigned long n; 323 324 const struct ide_proc_devset *setting; 325 char *buf, *s; 326 327 if (!capable(CAP_SYS_ADMIN)) 328 return -EACCES; 329 330 proc_ide_settings_warn(); 331 332 if (count >= PAGE_SIZE) 333 return -EINVAL; 334 335 s = buf = (char *)__get_free_page(GFP_USER); 336 if (!buf) 337 return -ENOMEM; 338 339 if (copy_from_user(buf, buffer, count)) { 340 free_page((unsigned long)buf); 341 return -EFAULT; 342 } 343 344 buf[count] = '\0'; 345 346 /* 347 * Skip over leading whitespace 348 */ 349 while (count && isspace(*s)) { 350 --count; 351 ++s; 352 } 353 /* 354 * Do one full pass to verify all parameters, 355 * then do another to actually write the new settings. 356 */ 357 do { 358 char *p = s; 359 n = count; 360 while (n > 0) { 361 unsigned val; 362 char *q = p; 363 364 while (n > 0 && *p != ':') { 365 --n; 366 p++; 367 } 368 if (*p != ':') 369 goto parse_error; 370 if (p - q > MAX_LEN) 371 goto parse_error; 372 memcpy(name, q, p - q); 373 name[p - q] = 0; 374 375 if (n > 0) { 376 --n; 377 p++; 378 } else 379 goto parse_error; 380 381 val = simple_strtoul(p, &q, 10); 382 n -= q - p; 383 p = q; 384 if (n > 0 && !isspace(*p)) 385 goto parse_error; 386 while (n > 0 && isspace(*p)) { 387 --n; 388 ++p; 389 } 390 391 mutex_lock(&ide_setting_mtx); 392 /* generic settings first, then driver specific ones */ 393 setting = ide_find_setting(ide_generic_settings, name); 394 if (!setting) { 395 if (drive->settings) 396 setting = ide_find_setting(drive->settings, name); 397 if (!setting) { 398 mutex_unlock(&ide_setting_mtx); 399 goto parse_error; 400 } 401 } 402 if (for_real) { 403 mul_factor = setting->mulf ? setting->mulf(drive) : 1; 404 div_factor = setting->divf ? setting->divf(drive) : 1; 405 ide_write_setting(drive, setting, val * div_factor / mul_factor); 406 } 407 mutex_unlock(&ide_setting_mtx); 408 } 409 } while (!for_real++); 410 free_page((unsigned long)buf); 411 return count; 412parse_error: 413 free_page((unsigned long)buf); 414 printk("%s(): parse error\n", __func__); 415 return -EINVAL; 416} 417 418static const struct file_operations ide_settings_proc_fops = { 419 .owner = THIS_MODULE, 420 .open = ide_settings_proc_open, 421 .read = seq_read, 422 .llseek = seq_lseek, 423 .release = single_release, 424 .write = ide_settings_proc_write, 425}; 426 427static int ide_capacity_proc_show(struct seq_file *m, void *v) 428{ 429 seq_printf(m, "%llu\n", (long long)0x7fffffff); 430 return 0; 431} 432 433static int ide_capacity_proc_open(struct inode *inode, struct file *file) 434{ 435 return single_open(file, ide_capacity_proc_show, NULL); 436} 437 438const struct file_operations ide_capacity_proc_fops = { 439 .owner = THIS_MODULE, 440 .open = ide_capacity_proc_open, 441 .read = seq_read, 442 .llseek = seq_lseek, 443 .release = single_release, 444}; 445EXPORT_SYMBOL_GPL(ide_capacity_proc_fops); 446 447static int ide_geometry_proc_show(struct seq_file *m, void *v) 448{ 449 ide_drive_t *drive = (ide_drive_t *) m->private; 450 451 seq_printf(m, "physical %d/%d/%d\n", 452 drive->cyl, drive->head, drive->sect); 453 seq_printf(m, "logical %d/%d/%d\n", 454 drive->bios_cyl, drive->bios_head, drive->bios_sect); 455 return 0; 456} 457 458static int ide_geometry_proc_open(struct inode *inode, struct file *file) 459{ 460 return single_open(file, ide_geometry_proc_show, PDE(inode)->data); 461} 462 463const struct file_operations ide_geometry_proc_fops = { 464 .owner = THIS_MODULE, 465 .open = ide_geometry_proc_open, 466 .read = seq_read, 467 .llseek = seq_lseek, 468 .release = single_release, 469}; 470EXPORT_SYMBOL(ide_geometry_proc_fops); 471 472static int ide_dmodel_proc_show(struct seq_file *seq, void *v) 473{ 474 ide_drive_t *drive = (ide_drive_t *) seq->private; 475 char *m = (char *)&drive->id[ATA_ID_PROD]; 476 477 seq_printf(seq, "%.40s\n", m[0] ? m : "(none)"); 478 return 0; 479} 480 481static int ide_dmodel_proc_open(struct inode *inode, struct file *file) 482{ 483 return single_open(file, ide_dmodel_proc_show, PDE(inode)->data); 484} 485 486static const struct file_operations ide_dmodel_proc_fops = { 487 .owner = THIS_MODULE, 488 .open = ide_dmodel_proc_open, 489 .read = seq_read, 490 .llseek = seq_lseek, 491 .release = single_release, 492}; 493 494static int ide_driver_proc_show(struct seq_file *m, void *v) 495{ 496 ide_drive_t *drive = (ide_drive_t *)m->private; 497 struct device *dev = &drive->gendev; 498 struct ide_driver *ide_drv; 499 500 if (dev->driver) { 501 ide_drv = to_ide_driver(dev->driver); 502 seq_printf(m, "%s version %s\n", 503 dev->driver->name, ide_drv->version); 504 } else 505 seq_printf(m, "ide-default version 0.9.newide\n"); 506 return 0; 507} 508 509static int ide_driver_proc_open(struct inode *inode, struct file *file) 510{ 511 return single_open(file, ide_driver_proc_show, PDE(inode)->data); 512} 513 514static int ide_replace_subdriver(ide_drive_t *drive, const char *driver) 515{ 516 struct device *dev = &drive->gendev; 517 int ret = 1; 518 int err; 519 520 device_release_driver(dev); 521 strlcpy(drive->driver_req, driver, sizeof(drive->driver_req)); 522 err = device_attach(dev); 523 if (err < 0) 524 printk(KERN_WARNING "IDE: %s: device_attach error: %d\n", 525 __func__, err); 526 drive->driver_req[0] = 0; 527 if (dev->driver == NULL) { 528 err = device_attach(dev); 529 if (err < 0) 530 printk(KERN_WARNING 531 "IDE: %s: device_attach(2) error: %d\n", 532 __func__, err); 533 } 534 if (dev->driver && !strcmp(dev->driver->name, driver)) 535 ret = 0; 536 537 return ret; 538} 539 540static ssize_t ide_driver_proc_write(struct file *file, const char __user *buffer, 541 size_t count, loff_t *pos) 542{ 543 ide_drive_t *drive = (ide_drive_t *) PDE(file->f_path.dentry->d_inode)->data; 544 char name[32]; 545 546 if (!capable(CAP_SYS_ADMIN)) 547 return -EACCES; 548 if (count > 31) 549 count = 31; 550 if (copy_from_user(name, buffer, count)) 551 return -EFAULT; 552 name[count] = '\0'; 553 if (ide_replace_subdriver(drive, name)) 554 return -EINVAL; 555 return count; 556} 557 558static const struct file_operations ide_driver_proc_fops = { 559 .owner = THIS_MODULE, 560 .open = ide_driver_proc_open, 561 .read = seq_read, 562 .llseek = seq_lseek, 563 .release = single_release, 564 .write = ide_driver_proc_write, 565}; 566 567static int ide_media_proc_show(struct seq_file *m, void *v) 568{ 569 ide_drive_t *drive = (ide_drive_t *) m->private; 570 const char *media; 571 572 switch (drive->media) { 573 case ide_disk: media = "disk\n"; break; 574 case ide_cdrom: media = "cdrom\n"; break; 575 case ide_tape: media = "tape\n"; break; 576 case ide_floppy: media = "floppy\n"; break; 577 case ide_optical: media = "optical\n"; break; 578 default: media = "UNKNOWN\n"; break; 579 } 580 seq_puts(m, media); 581 return 0; 582} 583 584static int ide_media_proc_open(struct inode *inode, struct file *file) 585{ 586 return single_open(file, ide_media_proc_show, PDE(inode)->data); 587} 588 589static const struct file_operations ide_media_proc_fops = { 590 .owner = THIS_MODULE, 591 .open = ide_media_proc_open, 592 .read = seq_read, 593 .llseek = seq_lseek, 594 .release = single_release, 595}; 596 597static ide_proc_entry_t generic_drive_entries[] = { 598 { "driver", S_IFREG|S_IRUGO, &ide_driver_proc_fops }, 599 { "identify", S_IFREG|S_IRUSR, &ide_identify_proc_fops}, 600 { "media", S_IFREG|S_IRUGO, &ide_media_proc_fops }, 601 { "model", S_IFREG|S_IRUGO, &ide_dmodel_proc_fops }, 602 { "settings", S_IFREG|S_IRUSR|S_IWUSR, &ide_settings_proc_fops}, 603 {} 604}; 605 606static void ide_add_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p, void *data) 607{ 608 struct proc_dir_entry *ent; 609 610 if (!dir || !p) 611 return; 612 while (p->name != NULL) { 613 ent = proc_create_data(p->name, p->mode, dir, p->proc_fops, data); 614 if (!ent) return; 615 p++; 616 } 617} 618 619static void ide_remove_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p) 620{ 621 if (!dir || !p) 622 return; 623 while (p->name != NULL) { 624 remove_proc_entry(p->name, dir); 625 p++; 626 } 627} 628 629void ide_proc_register_driver(ide_drive_t *drive, struct ide_driver *driver) 630{ 631 mutex_lock(&ide_setting_mtx); 632 drive->settings = driver->proc_devsets(drive); 633 mutex_unlock(&ide_setting_mtx); 634 635 ide_add_proc_entries(drive->proc, driver->proc_entries(drive), drive); 636} 637 638EXPORT_SYMBOL(ide_proc_register_driver); 639 640/** 641 * ide_proc_unregister_driver - remove driver specific data 642 * @drive: drive 643 * @driver: driver 644 * 645 * Clean up the driver specific /proc files and IDE settings 646 * for a given drive. 647 * 648 * Takes ide_setting_mtx. 649 */ 650 651void ide_proc_unregister_driver(ide_drive_t *drive, struct ide_driver *driver) 652{ 653 ide_remove_proc_entries(drive->proc, driver->proc_entries(drive)); 654 655 mutex_lock(&ide_setting_mtx); 656 /* 657 * ide_setting_mtx protects both the settings list and the use 658 * of settings (we cannot take a setting out that is being used). 659 */ 660 drive->settings = NULL; 661 mutex_unlock(&ide_setting_mtx); 662} 663EXPORT_SYMBOL(ide_proc_unregister_driver); 664 665void ide_proc_port_register_devices(ide_hwif_t *hwif) 666{ 667 struct proc_dir_entry *ent; 668 struct proc_dir_entry *parent = hwif->proc; 669 ide_drive_t *drive; 670 char name[64]; 671 int i; 672 673 ide_port_for_each_dev(i, drive, hwif) { 674 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) 675 continue; 676 677 drive->proc = proc_mkdir(drive->name, parent); 678 if (drive->proc) 679 ide_add_proc_entries(drive->proc, generic_drive_entries, drive); 680 sprintf(name, "ide%d/%s", (drive->name[2]-'a')/2, drive->name); 681 ent = proc_symlink(drive->name, proc_ide_root, name); 682 if (!ent) return; 683 } 684} 685 686void ide_proc_unregister_device(ide_drive_t *drive) 687{ 688 if (drive->proc) { 689 ide_remove_proc_entries(drive->proc, generic_drive_entries); 690 remove_proc_entry(drive->name, proc_ide_root); 691 remove_proc_entry(drive->name, drive->hwif->proc); 692 drive->proc = NULL; 693 } 694} 695 696static ide_proc_entry_t hwif_entries[] = { 697 { "channel", S_IFREG|S_IRUGO, &ide_channel_proc_fops }, 698 { "mate", S_IFREG|S_IRUGO, &ide_mate_proc_fops }, 699 { "model", S_IFREG|S_IRUGO, &ide_imodel_proc_fops }, 700 {} 701}; 702 703void ide_proc_register_port(ide_hwif_t *hwif) 704{ 705 if (!hwif->proc) { 706 hwif->proc = proc_mkdir(hwif->name, proc_ide_root); 707 708 if (!hwif->proc) 709 return; 710 711 ide_add_proc_entries(hwif->proc, hwif_entries, hwif); 712 } 713} 714 715void ide_proc_unregister_port(ide_hwif_t *hwif) 716{ 717 if (hwif->proc) { 718 ide_remove_proc_entries(hwif->proc, hwif_entries); 719 remove_proc_entry(hwif->name, proc_ide_root); 720 hwif->proc = NULL; 721 } 722} 723 724static int proc_print_driver(struct device_driver *drv, void *data) 725{ 726 struct ide_driver *ide_drv = to_ide_driver(drv); 727 struct seq_file *s = data; 728 729 seq_printf(s, "%s version %s\n", drv->name, ide_drv->version); 730 731 return 0; 732} 733 734static int ide_drivers_show(struct seq_file *s, void *p) 735{ 736 int err; 737 738 err = bus_for_each_drv(&ide_bus_type, NULL, s, proc_print_driver); 739 if (err < 0) 740 printk(KERN_WARNING "IDE: %s: bus_for_each_drv error: %d\n", 741 __func__, err); 742 return 0; 743} 744 745static int ide_drivers_open(struct inode *inode, struct file *file) 746{ 747 return single_open(file, &ide_drivers_show, NULL); 748} 749 750static const struct file_operations ide_drivers_operations = { 751 .owner = THIS_MODULE, 752 .open = ide_drivers_open, 753 .read = seq_read, 754 .llseek = seq_lseek, 755 .release = single_release, 756}; 757 758void proc_ide_create(void) 759{ 760 proc_ide_root = proc_mkdir("ide", NULL); 761 762 if (!proc_ide_root) 763 return; 764 765 proc_create("drivers", 0, proc_ide_root, &ide_drivers_operations); 766} 767 768void proc_ide_destroy(void) 769{ 770 remove_proc_entry("drivers", proc_ide_root); 771 remove_proc_entry("ide", NULL); 772} 773