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[PATCH] ide proc destroy error
[linux-2.6/x86.git] / drivers / ide / ide-proc.c
blob4b1e43b4118b696eec9a0d1a7609d9099110e863
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/config.h>
26 #include <linux/module.h>
27
28 #include <asm/uaccess.h>
29 #include <linux/errno.h>
30 #include <linux/sched.h>
31 #include <linux/proc_fs.h>
32 #include <linux/stat.h>
33 #include <linux/mm.h>
34 #include <linux/pci.h>
35 #include <linux/ctype.h>
36 #include <linux/hdreg.h>
37 #include <linux/ide.h>
38 #include <linux/seq_file.h>
39
40 #include <asm/io.h>
41
42 static int proc_ide_read_imodel
43 (char *page, char **start, off_t off, int count, int *eof, void *data)
44 {
45 ide_hwif_t *hwif = (ide_hwif_t *) data;
46 int len;
47 const char *name;
48
49 /*
50 * Neither ide_unknown nor ide_forced should be set at this point.
51 */
52 switch (hwif->chipset) {
53 case ide_generic: name = "generic"; break;
54 case ide_pci: name = "pci"; break;
55 case ide_cmd640: name = "cmd640"; break;
56 case ide_dtc2278: name = "dtc2278"; break;
57 case ide_ali14xx: name = "ali14xx"; break;
58 case ide_qd65xx: name = "qd65xx"; break;
59 case ide_umc8672: name = "umc8672"; break;
60 case ide_ht6560b: name = "ht6560b"; break;
61 case ide_rz1000: name = "rz1000"; break;
62 case ide_trm290: name = "trm290"; break;
63 case ide_cmd646: name = "cmd646"; break;
64 case ide_cy82c693: name = "cy82c693"; break;
65 case ide_4drives: name = "4drives"; break;
66 case ide_pmac: name = "mac-io"; 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
73 static 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
86 static 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
98 static 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
125 static 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
137 static 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
173 static 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;
261 parse_error:
262 free_page((unsigned long)buf);
263 printk("proc_ide_write_settings(): parse error\n");
264 return -EINVAL;
265 }
266
267 int 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
274 EXPORT_SYMBOL_GPL(proc_ide_read_capacity);
275
276 int 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
292 EXPORT_SYMBOL(proc_ide_read_geometry);
293
294 static 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
306 static 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 ide_driver_t *driver = drive->driver;
311 int len;
312
313 if (driver) {
314 len = sprintf(page, "%s version %s\n",
315 driver->name, driver->version);
316 } else
317 len = sprintf(page, "ide-default version 0.9.newide\n");
318 PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
319 }
320
321 static int proc_ide_write_driver
322 (struct file *file, const char __user *buffer, unsigned long count, void *data)
323 {
324 ide_drive_t *drive = (ide_drive_t *) data;
325 char name[32];
326
327 if (!capable(CAP_SYS_ADMIN))
328 return -EACCES;
329 if (count > 31)
330 count = 31;
331 if (copy_from_user(name, buffer, count))
332 return -EFAULT;
333 name[count] = '\0';
334 if (ide_replace_subdriver(drive, name))
335 return -EINVAL;
336 return count;
337 }
338
339 static int proc_ide_read_media
340 (char *page, char **start, off_t off, int count, int *eof, void *data)
341 {
342 ide_drive_t *drive = (ide_drive_t *) data;
343 const char *media;
344 int len;
345
346 switch (drive->media) {
347 case ide_disk: media = "disk\n";
348 break;
349 case ide_cdrom: media = "cdrom\n";
350 break;
351 case ide_tape: media = "tape\n";
352 break;
353 case ide_floppy:media = "floppy\n";
354 break;
355 default: media = "UNKNOWN\n";
356 break;
357 }
358 strcpy(page,media);
359 len = strlen(media);
360 PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
361 }
362
363 static ide_proc_entry_t generic_drive_entries[] = {
364 { "driver", S_IFREG|S_IRUGO, proc_ide_read_driver, proc_ide_write_driver },
365 { "identify", S_IFREG|S_IRUSR, proc_ide_read_identify, NULL },
366 { "media", S_IFREG|S_IRUGO, proc_ide_read_media, NULL },
367 { "model", S_IFREG|S_IRUGO, proc_ide_read_dmodel, NULL },
368 { "settings", S_IFREG|S_IRUSR|S_IWUSR,proc_ide_read_settings, proc_ide_write_settings },
369 { NULL, 0, NULL, NULL }
370 };
371
372 void ide_add_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p, void *data)
373 {
374 struct proc_dir_entry *ent;
375
376 if (!dir || !p)
377 return;
378 while (p->name != NULL) {
379 ent = create_proc_entry(p->name, p->mode, dir);
380 if (!ent) return;
381 ent->nlink = 1;
382 ent->data = data;
383 ent->read_proc = p->read_proc;
384 ent->write_proc = p->write_proc;
385 p++;
386 }
387 }
388
389 void ide_remove_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p)
390 {
391 if (!dir || !p)
392 return;
393 while (p->name != NULL) {
394 remove_proc_entry(p->name, dir);
395 p++;
396 }
397 }
398
399 static void create_proc_ide_drives(ide_hwif_t *hwif)
400 {
401 int d;
402 struct proc_dir_entry *ent;
403 struct proc_dir_entry *parent = hwif->proc;
404 char name[64];
405
406 for (d = 0; d < MAX_DRIVES; d++) {
407 ide_drive_t *drive = &hwif->drives[d];
408
409 if (!drive->present)
410 continue;
411 if (drive->proc)
412 continue;
413
414 drive->proc = proc_mkdir(drive->name, parent);
415 if (drive->proc)
416 ide_add_proc_entries(drive->proc, generic_drive_entries, drive);
417 sprintf(name,"ide%d/%s", (drive->name[2]-'a')/2, drive->name);
418 ent = proc_symlink(drive->name, proc_ide_root, name);
419 if (!ent) return;
420 }
421 }
422
423 static void destroy_proc_ide_device(ide_hwif_t *hwif, ide_drive_t *drive)
424 {
425 if (drive->proc) {
426 ide_remove_proc_entries(drive->proc, generic_drive_entries);
427 remove_proc_entry(drive->name, proc_ide_root);
428 remove_proc_entry(drive->name, hwif->proc);
429 drive->proc = NULL;
430 }
431 }
432
433 static void destroy_proc_ide_drives(ide_hwif_t *hwif)
434 {
435 int d;
436
437 for (d = 0; d < MAX_DRIVES; d++) {
438 ide_drive_t *drive = &hwif->drives[d];
439 if (drive->proc)
440 destroy_proc_ide_device(hwif, drive);
441 }
442 }
443
444 static ide_proc_entry_t hwif_entries[] = {
445 { "channel", S_IFREG|S_IRUGO, proc_ide_read_channel, NULL },
446 { "mate", S_IFREG|S_IRUGO, proc_ide_read_mate, NULL },
447 { "model", S_IFREG|S_IRUGO, proc_ide_read_imodel, NULL },
448 { NULL, 0, NULL, NULL }
449 };
450
451 void create_proc_ide_interfaces(void)
452 {
453 int h;
454
455 for (h = 0; h < MAX_HWIFS; h++) {
456 ide_hwif_t *hwif = &ide_hwifs[h];
457
458 if (!hwif->present)
459 continue;
460 if (!hwif->proc) {
461 hwif->proc = proc_mkdir(hwif->name, proc_ide_root);
462 if (!hwif->proc)
463 return;
464 ide_add_proc_entries(hwif->proc, hwif_entries, hwif);
465 }
466 create_proc_ide_drives(hwif);
467 }
468 }
469
470 EXPORT_SYMBOL(create_proc_ide_interfaces);
471
472 #ifdef CONFIG_BLK_DEV_IDEPCI
473 void ide_pci_create_host_proc(const char *name, get_info_t *get_info)
474 {
475 create_proc_info_entry(name, 0, proc_ide_root, get_info);
476 }
477
478 EXPORT_SYMBOL_GPL(ide_pci_create_host_proc);
479 #endif
480
481 void destroy_proc_ide_interface(ide_hwif_t *hwif)
482 {
483 if (hwif->proc) {
484 destroy_proc_ide_drives(hwif);
485 ide_remove_proc_entries(hwif->proc, hwif_entries);
486 remove_proc_entry(hwif->name, proc_ide_root);
487 hwif->proc = NULL;
488 }
489 }
490
491 extern struct seq_operations ide_drivers_op;
492 static int ide_drivers_open(struct inode *inode, struct file *file)
493 {
494 return seq_open(file, &ide_drivers_op);
495 }
496 static struct file_operations ide_drivers_operations = {
497 .open = ide_drivers_open,
498 .read = seq_read,
499 .llseek = seq_lseek,
500 .release = seq_release,
501 };
502
503 void proc_ide_create(void)
504 {
505 struct proc_dir_entry *entry;
506
507 if (!proc_ide_root)
508 return;
509
510 create_proc_ide_interfaces();
511
512 entry = create_proc_entry("drivers", 0, proc_ide_root);
513 if (entry)
514 entry->proc_fops = &ide_drivers_operations;
515 }
516
517 void proc_ide_destroy(void)
518 {
519 remove_proc_entry("drivers", proc_ide_root);
520 remove_proc_entry("ide", NULL);
521 }
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