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_DATA(inode)); 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_DATA(inode)); 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_DATA(inode)); 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_DATA(inode)); 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/** 205 * ide_write_setting - read an IDE setting 206 * @drive: drive to read from 207 * @setting: drive setting 208 * @val: value 209 * 210 * Write a drive setting if it is possible. The caller 211 * must hold the ide_setting_mtx when making this call. 212 * 213 * BUGS: the data return and error are the same return value 214 * so an error -EINVAL and true return of the same value cannot 215 * be told apart 216 * 217 * FIXME: This should be changed to enqueue a special request 218 * to the driver to change settings, and then wait on a sema for completion. 219 * The current scheme of polling is kludgy, though safe enough. 220 */ 221 222static int ide_write_setting(ide_drive_t *drive, 223 const struct ide_proc_devset *setting, int val) 224{ 225 const struct ide_devset *ds = setting->setting; 226 227 if (!capable(CAP_SYS_ADMIN)) 228 return -EACCES; 229 if (!ds->set) 230 return -EPERM; 231 if ((ds->flags & DS_SYNC) 232 && (val < setting->min || val > setting->max)) 233 return -EINVAL; 234 return ide_devset_execute(drive, ds, val); 235} 236 237ide_devset_get(xfer_rate, current_speed); 238 239static int set_xfer_rate (ide_drive_t *drive, int arg) 240{ 241 struct ide_cmd cmd; 242 243 if (arg < XFER_PIO_0 || arg > XFER_UDMA_6) 244 return -EINVAL; 245 246 memset(&cmd, 0, sizeof(cmd)); 247 cmd.tf.command = ATA_CMD_SET_FEATURES; 248 cmd.tf.feature = SETFEATURES_XFER; 249 cmd.tf.nsect = (u8)arg; 250 cmd.valid.out.tf = IDE_VALID_FEATURE | IDE_VALID_NSECT; 251 cmd.valid.in.tf = IDE_VALID_NSECT; 252 cmd.tf_flags = IDE_TFLAG_SET_XFER; 253 254 return ide_no_data_taskfile(drive, &cmd); 255} 256 257ide_devset_rw(current_speed, xfer_rate); 258ide_devset_rw_field(init_speed, init_speed); 259ide_devset_rw_flag(nice1, IDE_DFLAG_NICE1); 260ide_devset_rw_field(number, dn); 261 262static const struct ide_proc_devset ide_generic_settings[] = { 263 IDE_PROC_DEVSET(current_speed, 0, 70), 264 IDE_PROC_DEVSET(init_speed, 0, 70), 265 IDE_PROC_DEVSET(io_32bit, 0, 1 + (SUPPORT_VLB_SYNC << 1)), 266 IDE_PROC_DEVSET(keepsettings, 0, 1), 267 IDE_PROC_DEVSET(nice1, 0, 1), 268 IDE_PROC_DEVSET(number, 0, 3), 269 IDE_PROC_DEVSET(pio_mode, 0, 255), 270 IDE_PROC_DEVSET(unmaskirq, 0, 1), 271 IDE_PROC_DEVSET(using_dma, 0, 1), 272 { NULL }, 273}; 274 275static void proc_ide_settings_warn(void) 276{ 277 printk_once(KERN_WARNING "Warning: /proc/ide/hd?/settings interface is " 278 "obsolete, and will be removed soon!\n"); 279} 280 281static int ide_settings_proc_show(struct seq_file *m, void *v) 282{ 283 const struct ide_proc_devset *setting, *g, *d; 284 const struct ide_devset *ds; 285 ide_drive_t *drive = (ide_drive_t *) m->private; 286 int rc, mul_factor, div_factor; 287 288 proc_ide_settings_warn(); 289 290 mutex_lock(&ide_setting_mtx); 291 g = ide_generic_settings; 292 d = drive->settings; 293 seq_printf(m, "name\t\t\tvalue\t\tmin\t\tmax\t\tmode\n"); 294 seq_printf(m, "----\t\t\t-----\t\t---\t\t---\t\t----\n"); 295 while (g->name || (d && d->name)) { 296 /* read settings in the alphabetical order */ 297 if (g->name && d && d->name) { 298 if (strcmp(d->name, g->name) < 0) 299 setting = d++; 300 else 301 setting = g++; 302 } else if (d && d->name) { 303 setting = d++; 304 } else 305 setting = g++; 306 mul_factor = setting->mulf ? setting->mulf(drive) : 1; 307 div_factor = setting->divf ? setting->divf(drive) : 1; 308 seq_printf(m, "%-24s", setting->name); 309 rc = ide_read_setting(drive, setting); 310 if (rc >= 0) 311 seq_printf(m, "%-16d", rc * mul_factor / div_factor); 312 else 313 seq_printf(m, "%-16s", "write-only"); 314 seq_printf(m, "%-16d%-16d", (setting->min * mul_factor + div_factor - 1) / div_factor, setting->max * mul_factor / div_factor); 315 ds = setting->setting; 316 if (ds->get) 317 seq_printf(m, "r"); 318 if (ds->set) 319 seq_printf(m, "w"); 320 seq_printf(m, "\n"); 321 } 322 mutex_unlock(&ide_setting_mtx); 323 return 0; 324} 325 326static int ide_settings_proc_open(struct inode *inode, struct file *file) 327{ 328 return single_open(file, ide_settings_proc_show, PDE_DATA(inode)); 329} 330 331#define MAX_LEN 30 332 333static ssize_t ide_settings_proc_write(struct file *file, const char __user *buffer, 334 size_t count, loff_t *pos) 335{ 336 ide_drive_t *drive = PDE_DATA(file_inode(file)); 337 char name[MAX_LEN + 1]; 338 int for_real = 0, mul_factor, div_factor; 339 unsigned long n; 340 341 const struct ide_proc_devset *setting; 342 char *buf, *s; 343 344 if (!capable(CAP_SYS_ADMIN)) 345 return -EACCES; 346 347 proc_ide_settings_warn(); 348 349 if (count >= PAGE_SIZE) 350 return -EINVAL; 351 352 s = buf = (char *)__get_free_page(GFP_USER); 353 if (!buf) 354 return -ENOMEM; 355 356 if (copy_from_user(buf, buffer, count)) { 357 free_page((unsigned long)buf); 358 return -EFAULT; 359 } 360 361 buf[count] = '\0'; 362 363 /* 364 * Skip over leading whitespace 365 */ 366 while (count && isspace(*s)) { 367 --count; 368 ++s; 369 } 370 /* 371 * Do one full pass to verify all parameters, 372 * then do another to actually write the new settings. 373 */ 374 do { 375 char *p = s; 376 n = count; 377 while (n > 0) { 378 unsigned val; 379 char *q = p; 380 381 while (n > 0 && *p != ':') { 382 --n; 383 p++; 384 } 385 if (*p != ':') 386 goto parse_error; 387 if (p - q > MAX_LEN) 388 goto parse_error; 389 memcpy(name, q, p - q); 390 name[p - q] = 0; 391 392 if (n > 0) { 393 --n; 394 p++; 395 } else 396 goto parse_error; 397 398 val = simple_strtoul(p, &q, 10); 399 n -= q - p; 400 p = q; 401 if (n > 0 && !isspace(*p)) 402 goto parse_error; 403 while (n > 0 && isspace(*p)) { 404 --n; 405 ++p; 406 } 407 408 mutex_lock(&ide_setting_mtx); 409 /* generic settings first, then driver specific ones */ 410 setting = ide_find_setting(ide_generic_settings, name); 411 if (!setting) { 412 if (drive->settings) 413 setting = ide_find_setting(drive->settings, name); 414 if (!setting) { 415 mutex_unlock(&ide_setting_mtx); 416 goto parse_error; 417 } 418 } 419 if (for_real) { 420 mul_factor = setting->mulf ? setting->mulf(drive) : 1; 421 div_factor = setting->divf ? setting->divf(drive) : 1; 422 ide_write_setting(drive, setting, val * div_factor / mul_factor); 423 } 424 mutex_unlock(&ide_setting_mtx); 425 } 426 } while (!for_real++); 427 free_page((unsigned long)buf); 428 return count; 429parse_error: 430 free_page((unsigned long)buf); 431 printk("%s(): parse error\n", __func__); 432 return -EINVAL; 433} 434 435static const struct file_operations ide_settings_proc_fops = { 436 .owner = THIS_MODULE, 437 .open = ide_settings_proc_open, 438 .read = seq_read, 439 .llseek = seq_lseek, 440 .release = single_release, 441 .write = ide_settings_proc_write, 442}; 443 444static int ide_capacity_proc_show(struct seq_file *m, void *v) 445{ 446 seq_printf(m, "%llu\n", (long long)0x7fffffff); 447 return 0; 448} 449 450static int ide_capacity_proc_open(struct inode *inode, struct file *file) 451{ 452 return single_open(file, ide_capacity_proc_show, NULL); 453} 454 455const struct file_operations ide_capacity_proc_fops = { 456 .owner = THIS_MODULE, 457 .open = ide_capacity_proc_open, 458 .read = seq_read, 459 .llseek = seq_lseek, 460 .release = single_release, 461}; 462EXPORT_SYMBOL_GPL(ide_capacity_proc_fops); 463 464static int ide_geometry_proc_show(struct seq_file *m, void *v) 465{ 466 ide_drive_t *drive = (ide_drive_t *) m->private; 467 468 seq_printf(m, "physical %d/%d/%d\n", 469 drive->cyl, drive->head, drive->sect); 470 seq_printf(m, "logical %d/%d/%d\n", 471 drive->bios_cyl, drive->bios_head, drive->bios_sect); 472 return 0; 473} 474 475static int ide_geometry_proc_open(struct inode *inode, struct file *file) 476{ 477 return single_open(file, ide_geometry_proc_show, PDE_DATA(inode)); 478} 479 480const struct file_operations ide_geometry_proc_fops = { 481 .owner = THIS_MODULE, 482 .open = ide_geometry_proc_open, 483 .read = seq_read, 484 .llseek = seq_lseek, 485 .release = single_release, 486}; 487EXPORT_SYMBOL(ide_geometry_proc_fops); 488 489static int ide_dmodel_proc_show(struct seq_file *seq, void *v) 490{ 491 ide_drive_t *drive = (ide_drive_t *) seq->private; 492 char *m = (char *)&drive->id[ATA_ID_PROD]; 493 494 seq_printf(seq, "%.40s\n", m[0] ? m : "(none)"); 495 return 0; 496} 497 498static int ide_dmodel_proc_open(struct inode *inode, struct file *file) 499{ 500 return single_open(file, ide_dmodel_proc_show, PDE_DATA(inode)); 501} 502 503static const struct file_operations ide_dmodel_proc_fops = { 504 .owner = THIS_MODULE, 505 .open = ide_dmodel_proc_open, 506 .read = seq_read, 507 .llseek = seq_lseek, 508 .release = single_release, 509}; 510 511static int ide_driver_proc_show(struct seq_file *m, void *v) 512{ 513 ide_drive_t *drive = (ide_drive_t *)m->private; 514 struct device *dev = &drive->gendev; 515 struct ide_driver *ide_drv; 516 517 if (dev->driver) { 518 ide_drv = to_ide_driver(dev->driver); 519 seq_printf(m, "%s version %s\n", 520 dev->driver->name, ide_drv->version); 521 } else 522 seq_printf(m, "ide-default version 0.9.newide\n"); 523 return 0; 524} 525 526static int ide_driver_proc_open(struct inode *inode, struct file *file) 527{ 528 return single_open(file, ide_driver_proc_show, PDE_DATA(inode)); 529} 530 531static int ide_replace_subdriver(ide_drive_t *drive, const char *driver) 532{ 533 struct device *dev = &drive->gendev; 534 int ret = 1; 535 int err; 536 537 device_release_driver(dev); 538 /* FIXME: device can still be in use by previous driver */ 539 strlcpy(drive->driver_req, driver, sizeof(drive->driver_req)); 540 err = device_attach(dev); 541 if (err < 0) 542 printk(KERN_WARNING "IDE: %s: device_attach error: %d\n", 543 __func__, err); 544 drive->driver_req[0] = 0; 545 if (dev->driver == NULL) { 546 err = device_attach(dev); 547 if (err < 0) 548 printk(KERN_WARNING 549 "IDE: %s: device_attach(2) error: %d\n", 550 __func__, err); 551 } 552 if (dev->driver && !strcmp(dev->driver->name, driver)) 553 ret = 0; 554 555 return ret; 556} 557 558static ssize_t ide_driver_proc_write(struct file *file, const char __user *buffer, 559 size_t count, loff_t *pos) 560{ 561 ide_drive_t *drive = PDE_DATA(file_inode(file)); 562 char name[32]; 563 564 if (!capable(CAP_SYS_ADMIN)) 565 return -EACCES; 566 if (count > 31) 567 count = 31; 568 if (copy_from_user(name, buffer, count)) 569 return -EFAULT; 570 name[count] = '\0'; 571 if (ide_replace_subdriver(drive, name)) 572 return -EINVAL; 573 return count; 574} 575 576static const struct file_operations ide_driver_proc_fops = { 577 .owner = THIS_MODULE, 578 .open = ide_driver_proc_open, 579 .read = seq_read, 580 .llseek = seq_lseek, 581 .release = single_release, 582 .write = ide_driver_proc_write, 583}; 584 585static int ide_media_proc_show(struct seq_file *m, void *v) 586{ 587 ide_drive_t *drive = (ide_drive_t *) m->private; 588 const char *media; 589 590 switch (drive->media) { 591 case ide_disk: media = "disk\n"; break; 592 case ide_cdrom: media = "cdrom\n"; break; 593 case ide_tape: media = "tape\n"; break; 594 case ide_floppy: media = "floppy\n"; break; 595 case ide_optical: media = "optical\n"; break; 596 default: media = "UNKNOWN\n"; break; 597 } 598 seq_puts(m, media); 599 return 0; 600} 601 602static int ide_media_proc_open(struct inode *inode, struct file *file) 603{ 604 return single_open(file, ide_media_proc_show, PDE_DATA(inode)); 605} 606 607static const struct file_operations ide_media_proc_fops = { 608 .owner = THIS_MODULE, 609 .open = ide_media_proc_open, 610 .read = seq_read, 611 .llseek = seq_lseek, 612 .release = single_release, 613}; 614 615static ide_proc_entry_t generic_drive_entries[] = { 616 { "driver", S_IFREG|S_IRUGO, &ide_driver_proc_fops }, 617 { "identify", S_IFREG|S_IRUSR, &ide_identify_proc_fops}, 618 { "media", S_IFREG|S_IRUGO, &ide_media_proc_fops }, 619 { "model", S_IFREG|S_IRUGO, &ide_dmodel_proc_fops }, 620 { "settings", S_IFREG|S_IRUSR|S_IWUSR, &ide_settings_proc_fops}, 621 {} 622}; 623 624static void ide_add_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p, void *data) 625{ 626 struct proc_dir_entry *ent; 627 628 if (!dir || !p) 629 return; 630 while (p->name != NULL) { 631 ent = proc_create_data(p->name, p->mode, dir, p->proc_fops, data); 632 if (!ent) return; 633 p++; 634 } 635} 636 637static void ide_remove_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p) 638{ 639 if (!dir || !p) 640 return; 641 while (p->name != NULL) { 642 remove_proc_entry(p->name, dir); 643 p++; 644 } 645} 646 647void ide_proc_register_driver(ide_drive_t *drive, struct ide_driver *driver) 648{ 649 mutex_lock(&ide_setting_mtx); 650 drive->settings = driver->proc_devsets(drive); 651 mutex_unlock(&ide_setting_mtx); 652 653 ide_add_proc_entries(drive->proc, driver->proc_entries(drive), drive); 654} 655 656EXPORT_SYMBOL(ide_proc_register_driver); 657 658/** 659 * ide_proc_unregister_driver - remove driver specific data 660 * @drive: drive 661 * @driver: driver 662 * 663 * Clean up the driver specific /proc files and IDE settings 664 * for a given drive. 665 * 666 * Takes ide_setting_mtx. 667 */ 668 669void ide_proc_unregister_driver(ide_drive_t *drive, struct ide_driver *driver) 670{ 671 ide_remove_proc_entries(drive->proc, driver->proc_entries(drive)); 672 673 mutex_lock(&ide_setting_mtx); 674 /* 675 * ide_setting_mtx protects both the settings list and the use 676 * of settings (we cannot take a setting out that is being used). 677 */ 678 drive->settings = NULL; 679 mutex_unlock(&ide_setting_mtx); 680} 681EXPORT_SYMBOL(ide_proc_unregister_driver); 682 683void ide_proc_port_register_devices(ide_hwif_t *hwif) 684{ 685 struct proc_dir_entry *ent; 686 struct proc_dir_entry *parent = hwif->proc; 687 ide_drive_t *drive; 688 char name[64]; 689 int i; 690 691 ide_port_for_each_dev(i, drive, hwif) { 692 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) 693 continue; 694 695 drive->proc = proc_mkdir(drive->name, parent); 696 if (drive->proc) 697 ide_add_proc_entries(drive->proc, generic_drive_entries, drive); 698 sprintf(name, "ide%d/%s", (drive->name[2]-'a')/2, drive->name); 699 ent = proc_symlink(drive->name, proc_ide_root, name); 700 if (!ent) return; 701 } 702} 703 704void ide_proc_unregister_device(ide_drive_t *drive) 705{ 706 if (drive->proc) { 707 ide_remove_proc_entries(drive->proc, generic_drive_entries); 708 remove_proc_entry(drive->name, proc_ide_root); 709 remove_proc_entry(drive->name, drive->hwif->proc); 710 drive->proc = NULL; 711 } 712} 713 714static ide_proc_entry_t hwif_entries[] = { 715 { "channel", S_IFREG|S_IRUGO, &ide_channel_proc_fops }, 716 { "mate", S_IFREG|S_IRUGO, &ide_mate_proc_fops }, 717 { "model", S_IFREG|S_IRUGO, &ide_imodel_proc_fops }, 718 {} 719}; 720 721void ide_proc_register_port(ide_hwif_t *hwif) 722{ 723 if (!hwif->proc) { 724 hwif->proc = proc_mkdir(hwif->name, proc_ide_root); 725 726 if (!hwif->proc) 727 return; 728 729 ide_add_proc_entries(hwif->proc, hwif_entries, hwif); 730 } 731} 732 733void ide_proc_unregister_port(ide_hwif_t *hwif) 734{ 735 if (hwif->proc) { 736 ide_remove_proc_entries(hwif->proc, hwif_entries); 737 remove_proc_entry(hwif->name, proc_ide_root); 738 hwif->proc = NULL; 739 } 740} 741 742static int proc_print_driver(struct device_driver *drv, void *data) 743{ 744 struct ide_driver *ide_drv = to_ide_driver(drv); 745 struct seq_file *s = data; 746 747 seq_printf(s, "%s version %s\n", drv->name, ide_drv->version); 748 749 return 0; 750} 751 752static int ide_drivers_show(struct seq_file *s, void *p) 753{ 754 int err; 755 756 err = bus_for_each_drv(&ide_bus_type, NULL, s, proc_print_driver); 757 if (err < 0) 758 printk(KERN_WARNING "IDE: %s: bus_for_each_drv error: %d\n", 759 __func__, err); 760 return 0; 761} 762 763static int ide_drivers_open(struct inode *inode, struct file *file) 764{ 765 return single_open(file, &ide_drivers_show, NULL); 766} 767 768static const struct file_operations ide_drivers_operations = { 769 .owner = THIS_MODULE, 770 .open = ide_drivers_open, 771 .read = seq_read, 772 .llseek = seq_lseek, 773 .release = single_release, 774}; 775 776void proc_ide_create(void) 777{ 778 proc_ide_root = proc_mkdir("ide", NULL); 779 780 if (!proc_ide_root) 781 return; 782 783 proc_create("drivers", 0, proc_ide_root, &ide_drivers_operations); 784} 785 786void proc_ide_destroy(void) 787{ 788 remove_proc_entry("drivers", proc_ide_root); 789 remove_proc_entry("ide", NULL); 790} 791