ide-proc.c revision 2b8693c0617e972fc0b2fd1ebf8de97e15b656c3
1/* 2 * linux/drivers/ide/ide-proc.c Version 1.05 Mar 05, 2003 3 * 4 * Copyright (C) 1997-1998 Mark Lord 5 * Copyright (C) 2003 Red Hat <alan@redhat.com> 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 * Also useful, "cat /proc/ide0/hda/[identify, smart_values, 17 * smart_thresholds, capabilities]" will issue an IDENTIFY / 18 * PACKET_IDENTIFY / SMART_READ_VALUES / SMART_READ_THRESHOLDS / 19 * SENSE CAPABILITIES command to /dev/hda, and then dump out the 20 * returned data as 256 16-bit words. The "hdparm" utility will 21 * be updated someday soon to use this mechanism. 22 * 23 */ 24 25#include <linux/module.h> 26 27#include <asm/uaccess.h> 28#include <linux/errno.h> 29#include <linux/sched.h> 30#include <linux/proc_fs.h> 31#include <linux/stat.h> 32#include <linux/mm.h> 33#include <linux/pci.h> 34#include <linux/ctype.h> 35#include <linux/hdreg.h> 36#include <linux/ide.h> 37#include <linux/seq_file.h> 38 39#include <asm/io.h> 40 41static int proc_ide_read_imodel 42 (char *page, char **start, off_t off, int count, int *eof, void *data) 43{ 44 ide_hwif_t *hwif = (ide_hwif_t *) data; 45 int len; 46 const char *name; 47 48 /* 49 * Neither ide_unknown nor ide_forced should be set at this point. 50 */ 51 switch (hwif->chipset) { 52 case ide_generic: name = "generic"; break; 53 case ide_pci: name = "pci"; break; 54 case ide_cmd640: name = "cmd640"; break; 55 case ide_dtc2278: name = "dtc2278"; break; 56 case ide_ali14xx: name = "ali14xx"; break; 57 case ide_qd65xx: name = "qd65xx"; break; 58 case ide_umc8672: name = "umc8672"; break; 59 case ide_ht6560b: name = "ht6560b"; break; 60 case ide_rz1000: name = "rz1000"; break; 61 case ide_trm290: name = "trm290"; break; 62 case ide_cmd646: name = "cmd646"; break; 63 case ide_cy82c693: name = "cy82c693"; break; 64 case ide_4drives: name = "4drives"; break; 65 case ide_pmac: name = "mac-io"; break; 66 case ide_au1xxx: name = "au1xxx"; break; 67 default: name = "(unknown)"; break; 68 } 69 len = sprintf(page, "%s\n", name); 70 PROC_IDE_READ_RETURN(page,start,off,count,eof,len); 71} 72 73static int proc_ide_read_mate 74 (char *page, char **start, off_t off, int count, int *eof, void *data) 75{ 76 ide_hwif_t *hwif = (ide_hwif_t *) data; 77 int len; 78 79 if (hwif && hwif->mate && hwif->mate->present) 80 len = sprintf(page, "%s\n", hwif->mate->name); 81 else 82 len = sprintf(page, "(none)\n"); 83 PROC_IDE_READ_RETURN(page,start,off,count,eof,len); 84} 85 86static int proc_ide_read_channel 87 (char *page, char **start, off_t off, int count, int *eof, void *data) 88{ 89 ide_hwif_t *hwif = (ide_hwif_t *) data; 90 int len; 91 92 page[0] = hwif->channel ? '1' : '0'; 93 page[1] = '\n'; 94 len = 2; 95 PROC_IDE_READ_RETURN(page,start,off,count,eof,len); 96} 97 98static int proc_ide_read_identify 99 (char *page, char **start, off_t off, int count, int *eof, void *data) 100{ 101 ide_drive_t *drive = (ide_drive_t *)data; 102 int len = 0, i = 0; 103 int err = 0; 104 105 len = sprintf(page, "\n"); 106 107 if (drive) { 108 unsigned short *val = (unsigned short *) page; 109 110 err = taskfile_lib_get_identify(drive, page); 111 if (!err) { 112 char *out = ((char *)page) + (SECTOR_WORDS * 4); 113 page = out; 114 do { 115 out += sprintf(out, "%04x%c", 116 le16_to_cpu(*val), (++i & 7) ? ' ' : '\n'); 117 val += 1; 118 } while (i < (SECTOR_WORDS * 2)); 119 len = out - page; 120 } 121 } 122 PROC_IDE_READ_RETURN(page,start,off,count,eof,len); 123} 124 125static void proc_ide_settings_warn(void) 126{ 127 static int warned = 0; 128 129 if (warned) 130 return; 131 132 printk(KERN_WARNING "Warning: /proc/ide/hd?/settings interface is " 133 "obsolete, and will be removed soon!\n"); 134 warned = 1; 135} 136 137static int proc_ide_read_settings 138 (char *page, char **start, off_t off, int count, int *eof, void *data) 139{ 140 ide_drive_t *drive = (ide_drive_t *) data; 141 ide_settings_t *setting = (ide_settings_t *) drive->settings; 142 char *out = page; 143 int len, rc, mul_factor, div_factor; 144 145 proc_ide_settings_warn(); 146 147 down(&ide_setting_sem); 148 out += sprintf(out, "name\t\t\tvalue\t\tmin\t\tmax\t\tmode\n"); 149 out += sprintf(out, "----\t\t\t-----\t\t---\t\t---\t\t----\n"); 150 while(setting) { 151 mul_factor = setting->mul_factor; 152 div_factor = setting->div_factor; 153 out += sprintf(out, "%-24s", setting->name); 154 if ((rc = ide_read_setting(drive, setting)) >= 0) 155 out += sprintf(out, "%-16d", rc * mul_factor / div_factor); 156 else 157 out += sprintf(out, "%-16s", "write-only"); 158 out += sprintf(out, "%-16d%-16d", (setting->min * mul_factor + div_factor - 1) / div_factor, setting->max * mul_factor / div_factor); 159 if (setting->rw & SETTING_READ) 160 out += sprintf(out, "r"); 161 if (setting->rw & SETTING_WRITE) 162 out += sprintf(out, "w"); 163 out += sprintf(out, "\n"); 164 setting = setting->next; 165 } 166 len = out - page; 167 up(&ide_setting_sem); 168 PROC_IDE_READ_RETURN(page,start,off,count,eof,len); 169} 170 171#define MAX_LEN 30 172 173static int proc_ide_write_settings(struct file *file, const char __user *buffer, 174 unsigned long count, void *data) 175{ 176 ide_drive_t *drive = (ide_drive_t *) data; 177 char name[MAX_LEN + 1]; 178 int for_real = 0; 179 unsigned long n; 180 ide_settings_t *setting; 181 char *buf, *s; 182 183 if (!capable(CAP_SYS_ADMIN)) 184 return -EACCES; 185 186 proc_ide_settings_warn(); 187 188 if (count >= PAGE_SIZE) 189 return -EINVAL; 190 191 s = buf = (char *)__get_free_page(GFP_USER); 192 if (!buf) 193 return -ENOMEM; 194 195 if (copy_from_user(buf, buffer, count)) { 196 free_page((unsigned long)buf); 197 return -EFAULT; 198 } 199 200 buf[count] = '\0'; 201 202 /* 203 * Skip over leading whitespace 204 */ 205 while (count && isspace(*s)) { 206 --count; 207 ++s; 208 } 209 /* 210 * Do one full pass to verify all parameters, 211 * then do another to actually write the new settings. 212 */ 213 do { 214 char *p = s; 215 n = count; 216 while (n > 0) { 217 unsigned val; 218 char *q = p; 219 220 while (n > 0 && *p != ':') { 221 --n; 222 p++; 223 } 224 if (*p != ':') 225 goto parse_error; 226 if (p - q > MAX_LEN) 227 goto parse_error; 228 memcpy(name, q, p - q); 229 name[p - q] = 0; 230 231 if (n > 0) { 232 --n; 233 p++; 234 } else 235 goto parse_error; 236 237 val = simple_strtoul(p, &q, 10); 238 n -= q - p; 239 p = q; 240 if (n > 0 && !isspace(*p)) 241 goto parse_error; 242 while (n > 0 && isspace(*p)) { 243 --n; 244 ++p; 245 } 246 247 down(&ide_setting_sem); 248 setting = ide_find_setting_by_name(drive, name); 249 if (!setting) 250 { 251 up(&ide_setting_sem); 252 goto parse_error; 253 } 254 if (for_real) 255 ide_write_setting(drive, setting, val * setting->div_factor / setting->mul_factor); 256 up(&ide_setting_sem); 257 } 258 } while (!for_real++); 259 free_page((unsigned long)buf); 260 return count; 261parse_error: 262 free_page((unsigned long)buf); 263 printk("proc_ide_write_settings(): parse error\n"); 264 return -EINVAL; 265} 266 267int proc_ide_read_capacity 268 (char *page, char **start, off_t off, int count, int *eof, void *data) 269{ 270 int len = sprintf(page,"%llu\n", (long long)0x7fffffff); 271 PROC_IDE_READ_RETURN(page,start,off,count,eof,len); 272} 273 274EXPORT_SYMBOL_GPL(proc_ide_read_capacity); 275 276int proc_ide_read_geometry 277 (char *page, char **start, off_t off, int count, int *eof, void *data) 278{ 279 ide_drive_t *drive = (ide_drive_t *) data; 280 char *out = page; 281 int len; 282 283 out += sprintf(out,"physical %d/%d/%d\n", 284 drive->cyl, drive->head, drive->sect); 285 out += sprintf(out,"logical %d/%d/%d\n", 286 drive->bios_cyl, drive->bios_head, drive->bios_sect); 287 288 len = out - page; 289 PROC_IDE_READ_RETURN(page,start,off,count,eof,len); 290} 291 292EXPORT_SYMBOL(proc_ide_read_geometry); 293 294static int proc_ide_read_dmodel 295 (char *page, char **start, off_t off, int count, int *eof, void *data) 296{ 297 ide_drive_t *drive = (ide_drive_t *) data; 298 struct hd_driveid *id = drive->id; 299 int len; 300 301 len = sprintf(page, "%.40s\n", 302 (id && id->model[0]) ? (char *)id->model : "(none)"); 303 PROC_IDE_READ_RETURN(page,start,off,count,eof,len); 304} 305 306static int proc_ide_read_driver 307 (char *page, char **start, off_t off, int count, int *eof, void *data) 308{ 309 ide_drive_t *drive = (ide_drive_t *) data; 310 struct device *dev = &drive->gendev; 311 ide_driver_t *ide_drv; 312 int len; 313 314 down_read(&dev->bus->subsys.rwsem); 315 if (dev->driver) { 316 ide_drv = container_of(dev->driver, ide_driver_t, gen_driver); 317 len = sprintf(page, "%s version %s\n", 318 dev->driver->name, ide_drv->version); 319 } else 320 len = sprintf(page, "ide-default version 0.9.newide\n"); 321 up_read(&dev->bus->subsys.rwsem); 322 PROC_IDE_READ_RETURN(page,start,off,count,eof,len); 323} 324 325static int ide_replace_subdriver(ide_drive_t *drive, const char *driver) 326{ 327 struct device *dev = &drive->gendev; 328 int ret = 1; 329 int err; 330 331 down_write(&dev->bus->subsys.rwsem); 332 device_release_driver(dev); 333 /* FIXME: device can still be in use by previous driver */ 334 strlcpy(drive->driver_req, driver, sizeof(drive->driver_req)); 335 err = device_attach(dev); 336 if (err < 0) 337 printk(KERN_WARNING "IDE: %s: device_attach error: %d\n", 338 __FUNCTION__, err); 339 drive->driver_req[0] = 0; 340 if (dev->driver == NULL) { 341 err = device_attach(dev); 342 if (err < 0) 343 printk(KERN_WARNING 344 "IDE: %s: device_attach(2) error: %d\n", 345 __FUNCTION__, err); 346 } 347 if (dev->driver && !strcmp(dev->driver->name, driver)) 348 ret = 0; 349 up_write(&dev->bus->subsys.rwsem); 350 351 return ret; 352} 353 354static int proc_ide_write_driver 355 (struct file *file, const char __user *buffer, unsigned long count, void *data) 356{ 357 ide_drive_t *drive = (ide_drive_t *) data; 358 char name[32]; 359 360 if (!capable(CAP_SYS_ADMIN)) 361 return -EACCES; 362 if (count > 31) 363 count = 31; 364 if (copy_from_user(name, buffer, count)) 365 return -EFAULT; 366 name[count] = '\0'; 367 if (ide_replace_subdriver(drive, name)) 368 return -EINVAL; 369 return count; 370} 371 372static int proc_ide_read_media 373 (char *page, char **start, off_t off, int count, int *eof, void *data) 374{ 375 ide_drive_t *drive = (ide_drive_t *) data; 376 const char *media; 377 int len; 378 379 switch (drive->media) { 380 case ide_disk: media = "disk\n"; 381 break; 382 case ide_cdrom: media = "cdrom\n"; 383 break; 384 case ide_tape: media = "tape\n"; 385 break; 386 case ide_floppy:media = "floppy\n"; 387 break; 388 case ide_optical:media = "optical\n"; 389 break; 390 default: media = "UNKNOWN\n"; 391 break; 392 } 393 strcpy(page,media); 394 len = strlen(media); 395 PROC_IDE_READ_RETURN(page,start,off,count,eof,len); 396} 397 398static ide_proc_entry_t generic_drive_entries[] = { 399 { "driver", S_IFREG|S_IRUGO, proc_ide_read_driver, proc_ide_write_driver }, 400 { "identify", S_IFREG|S_IRUSR, proc_ide_read_identify, NULL }, 401 { "media", S_IFREG|S_IRUGO, proc_ide_read_media, NULL }, 402 { "model", S_IFREG|S_IRUGO, proc_ide_read_dmodel, NULL }, 403 { "settings", S_IFREG|S_IRUSR|S_IWUSR,proc_ide_read_settings, proc_ide_write_settings }, 404 { NULL, 0, NULL, NULL } 405}; 406 407void ide_add_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p, void *data) 408{ 409 struct proc_dir_entry *ent; 410 411 if (!dir || !p) 412 return; 413 while (p->name != NULL) { 414 ent = create_proc_entry(p->name, p->mode, dir); 415 if (!ent) return; 416 ent->data = data; 417 ent->read_proc = p->read_proc; 418 ent->write_proc = p->write_proc; 419 p++; 420 } 421} 422 423void ide_remove_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p) 424{ 425 if (!dir || !p) 426 return; 427 while (p->name != NULL) { 428 remove_proc_entry(p->name, dir); 429 p++; 430 } 431} 432 433static void create_proc_ide_drives(ide_hwif_t *hwif) 434{ 435 int d; 436 struct proc_dir_entry *ent; 437 struct proc_dir_entry *parent = hwif->proc; 438 char name[64]; 439 440 for (d = 0; d < MAX_DRIVES; d++) { 441 ide_drive_t *drive = &hwif->drives[d]; 442 443 if (!drive->present) 444 continue; 445 if (drive->proc) 446 continue; 447 448 drive->proc = proc_mkdir(drive->name, parent); 449 if (drive->proc) 450 ide_add_proc_entries(drive->proc, generic_drive_entries, drive); 451 sprintf(name,"ide%d/%s", (drive->name[2]-'a')/2, drive->name); 452 ent = proc_symlink(drive->name, proc_ide_root, name); 453 if (!ent) return; 454 } 455} 456 457static void destroy_proc_ide_device(ide_hwif_t *hwif, ide_drive_t *drive) 458{ 459 if (drive->proc) { 460 ide_remove_proc_entries(drive->proc, generic_drive_entries); 461 remove_proc_entry(drive->name, proc_ide_root); 462 remove_proc_entry(drive->name, hwif->proc); 463 drive->proc = NULL; 464 } 465} 466 467static void destroy_proc_ide_drives(ide_hwif_t *hwif) 468{ 469 int d; 470 471 for (d = 0; d < MAX_DRIVES; d++) { 472 ide_drive_t *drive = &hwif->drives[d]; 473 if (drive->proc) 474 destroy_proc_ide_device(hwif, drive); 475 } 476} 477 478static ide_proc_entry_t hwif_entries[] = { 479 { "channel", S_IFREG|S_IRUGO, proc_ide_read_channel, NULL }, 480 { "mate", S_IFREG|S_IRUGO, proc_ide_read_mate, NULL }, 481 { "model", S_IFREG|S_IRUGO, proc_ide_read_imodel, NULL }, 482 { NULL, 0, NULL, NULL } 483}; 484 485void create_proc_ide_interfaces(void) 486{ 487 int h; 488 489 for (h = 0; h < MAX_HWIFS; h++) { 490 ide_hwif_t *hwif = &ide_hwifs[h]; 491 492 if (!hwif->present) 493 continue; 494 if (!hwif->proc) { 495 hwif->proc = proc_mkdir(hwif->name, proc_ide_root); 496 if (!hwif->proc) 497 return; 498 ide_add_proc_entries(hwif->proc, hwif_entries, hwif); 499 } 500 create_proc_ide_drives(hwif); 501 } 502} 503 504EXPORT_SYMBOL(create_proc_ide_interfaces); 505 506#ifdef CONFIG_BLK_DEV_IDEPCI 507void ide_pci_create_host_proc(const char *name, get_info_t *get_info) 508{ 509 create_proc_info_entry(name, 0, proc_ide_root, get_info); 510} 511 512EXPORT_SYMBOL_GPL(ide_pci_create_host_proc); 513#endif 514 515void destroy_proc_ide_interface(ide_hwif_t *hwif) 516{ 517 if (hwif->proc) { 518 destroy_proc_ide_drives(hwif); 519 ide_remove_proc_entries(hwif->proc, hwif_entries); 520 remove_proc_entry(hwif->name, proc_ide_root); 521 hwif->proc = NULL; 522 } 523} 524 525static int proc_print_driver(struct device_driver *drv, void *data) 526{ 527 ide_driver_t *ide_drv = container_of(drv, ide_driver_t, gen_driver); 528 struct seq_file *s = data; 529 530 seq_printf(s, "%s version %s\n", drv->name, ide_drv->version); 531 532 return 0; 533} 534 535static int ide_drivers_show(struct seq_file *s, void *p) 536{ 537 int err; 538 539 err = bus_for_each_drv(&ide_bus_type, NULL, s, proc_print_driver); 540 if (err < 0) 541 printk(KERN_WARNING "IDE: %s: bus_for_each_drv error: %d\n", 542 __FUNCTION__, err); 543 return 0; 544} 545 546static int ide_drivers_open(struct inode *inode, struct file *file) 547{ 548 return single_open(file, &ide_drivers_show, NULL); 549} 550 551static const struct file_operations ide_drivers_operations = { 552 .open = ide_drivers_open, 553 .read = seq_read, 554 .llseek = seq_lseek, 555 .release = single_release, 556}; 557 558void proc_ide_create(void) 559{ 560 struct proc_dir_entry *entry; 561 562 if (!proc_ide_root) 563 return; 564 565 create_proc_ide_interfaces(); 566 567 entry = create_proc_entry("drivers", 0, proc_ide_root); 568 if (entry) 569 entry->proc_fops = &ide_drivers_operations; 570} 571 572void proc_ide_destroy(void) 573{ 574 remove_proc_entry("drivers", proc_ide_root); 575 remove_proc_entry("ide", NULL); 576} 577