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19#include <linux/module.h>
20#include <linux/init.h>
21#include <linux/string.h>
22#include <linux/mm.h>
23#include <linux/proc_fs.h>
24#include <linux/errno.h>
25#include <linux/blkdev.h>
26#include <linux/seq_file.h>
27#include <linux/mutex.h>
28#include <linux/gfp.h>
29#include <asm/uaccess.h>
30
31#include <scsi/scsi.h>
32#include <scsi/scsi_device.h>
33#include <scsi/scsi_host.h>
34#include <scsi/scsi_transport.h>
35
36#include "scsi_priv.h"
37#include "scsi_logging.h"
38
39
40
41#define PROC_BLOCK_SIZE (3*1024)
42
43static struct proc_dir_entry *proc_scsi;
44
45
46static DEFINE_MUTEX(global_host_template_mutex);
47
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56
57
58static int proc_scsi_read(char *buffer, char **start, off_t offset,
59 int length, int *eof, void *data)
60{
61 struct Scsi_Host *shost = data;
62 int n;
63
64 n = shost->hostt->proc_info(shost, buffer, start, offset, length, 0);
65 *eof = (n < length);
66
67 return n;
68}
69
70
71
72
73
74
75
76
77static int proc_scsi_write_proc(struct file *file, const char __user *buf,
78 unsigned long count, void *data)
79{
80 struct Scsi_Host *shost = data;
81 ssize_t ret = -ENOMEM;
82 char *page;
83 char *start;
84
85 if (count > PROC_BLOCK_SIZE)
86 return -EOVERFLOW;
87
88 page = (char *)__get_free_page(GFP_KERNEL);
89 if (page) {
90 ret = -EFAULT;
91 if (copy_from_user(page, buf, count))
92 goto out;
93 ret = shost->hostt->proc_info(shost, page, &start, 0, count, 1);
94 }
95out:
96 free_page((unsigned long)page);
97 return ret;
98}
99
100
101
102
103
104
105
106
107void scsi_proc_hostdir_add(struct scsi_host_template *sht)
108{
109 if (!sht->proc_info)
110 return;
111
112 mutex_lock(&global_host_template_mutex);
113 if (!sht->present++) {
114 sht->proc_dir = proc_mkdir(sht->proc_name, proc_scsi);
115 if (!sht->proc_dir)
116 printk(KERN_ERR "%s: proc_mkdir failed for %s\n",
117 __func__, sht->proc_name);
118 }
119 mutex_unlock(&global_host_template_mutex);
120}
121
122
123
124
125
126void scsi_proc_hostdir_rm(struct scsi_host_template *sht)
127{
128 if (!sht->proc_info)
129 return;
130
131 mutex_lock(&global_host_template_mutex);
132 if (!--sht->present && sht->proc_dir) {
133 remove_proc_entry(sht->proc_name, proc_scsi);
134 sht->proc_dir = NULL;
135 }
136 mutex_unlock(&global_host_template_mutex);
137}
138
139
140
141
142
143
144void scsi_proc_host_add(struct Scsi_Host *shost)
145{
146 struct scsi_host_template *sht = shost->hostt;
147 struct proc_dir_entry *p;
148 char name[10];
149
150 if (!sht->proc_dir)
151 return;
152
153 sprintf(name,"%d", shost->host_no);
154 p = create_proc_read_entry(name, S_IFREG | S_IRUGO | S_IWUSR,
155 sht->proc_dir, proc_scsi_read, shost);
156 if (!p) {
157 printk(KERN_ERR "%s: Failed to register host %d in"
158 "%s\n", __func__, shost->host_no,
159 sht->proc_name);
160 return;
161 }
162
163 p->write_proc = proc_scsi_write_proc;
164}
165
166
167
168
169
170void scsi_proc_host_rm(struct Scsi_Host *shost)
171{
172 char name[10];
173
174 if (!shost->hostt->proc_dir)
175 return;
176
177 sprintf(name,"%d", shost->host_no);
178 remove_proc_entry(name, shost->hostt->proc_dir);
179}
180
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183
184
185
186
187
188static int proc_print_scsidevice(struct device *dev, void *data)
189{
190 struct scsi_device *sdev;
191 struct seq_file *s = data;
192 int i;
193
194 if (!scsi_is_sdev_device(dev))
195 goto out;
196
197 sdev = to_scsi_device(dev);
198 seq_printf(s,
199 "Host: scsi%d Channel: %02d Id: %02d Lun: %02d\n Vendor: ",
200 sdev->host->host_no, sdev->channel, sdev->id, sdev->lun);
201 for (i = 0; i < 8; i++) {
202 if (sdev->vendor[i] >= 0x20)
203 seq_printf(s, "%c", sdev->vendor[i]);
204 else
205 seq_printf(s, " ");
206 }
207
208 seq_printf(s, " Model: ");
209 for (i = 0; i < 16; i++) {
210 if (sdev->model[i] >= 0x20)
211 seq_printf(s, "%c", sdev->model[i]);
212 else
213 seq_printf(s, " ");
214 }
215
216 seq_printf(s, " Rev: ");
217 for (i = 0; i < 4; i++) {
218 if (sdev->rev[i] >= 0x20)
219 seq_printf(s, "%c", sdev->rev[i]);
220 else
221 seq_printf(s, " ");
222 }
223
224 seq_printf(s, "\n");
225
226 seq_printf(s, " Type: %s ", scsi_device_type(sdev->type));
227 seq_printf(s, " ANSI SCSI revision: %02x",
228 sdev->scsi_level - (sdev->scsi_level > 1));
229 if (sdev->scsi_level == 2)
230 seq_printf(s, " CCS\n");
231 else
232 seq_printf(s, "\n");
233
234out:
235 return 0;
236}
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252
253static int scsi_add_single_device(uint host, uint channel, uint id, uint lun)
254{
255 struct Scsi_Host *shost;
256 int error = -ENXIO;
257
258 shost = scsi_host_lookup(host);
259 if (!shost)
260 return error;
261
262 if (shost->transportt->user_scan)
263 error = shost->transportt->user_scan(shost, channel, id, lun);
264 else
265 error = scsi_scan_host_selected(shost, channel, id, lun, 1);
266 scsi_host_put(shost);
267 return error;
268}
269
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278
279
280static int scsi_remove_single_device(uint host, uint channel, uint id, uint lun)
281{
282 struct scsi_device *sdev;
283 struct Scsi_Host *shost;
284 int error = -ENXIO;
285
286 shost = scsi_host_lookup(host);
287 if (!shost)
288 return error;
289 sdev = scsi_device_lookup(shost, channel, id, lun);
290 if (sdev) {
291 scsi_remove_device(sdev);
292 scsi_device_put(sdev);
293 error = 0;
294 }
295
296 scsi_host_put(shost);
297 return error;
298}
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318
319static ssize_t proc_scsi_write(struct file *file, const char __user *buf,
320 size_t length, loff_t *ppos)
321{
322 int host, channel, id, lun;
323 char *buffer, *p;
324 int err;
325
326 if (!buf || length > PAGE_SIZE)
327 return -EINVAL;
328
329 buffer = (char *)__get_free_page(GFP_KERNEL);
330 if (!buffer)
331 return -ENOMEM;
332
333 err = -EFAULT;
334 if (copy_from_user(buffer, buf, length))
335 goto out;
336
337 err = -EINVAL;
338 if (length < PAGE_SIZE)
339 buffer[length] = '\0';
340 else if (buffer[PAGE_SIZE-1])
341 goto out;
342
343
344
345
346
347 if (!strncmp("scsi add-single-device", buffer, 22)) {
348 p = buffer + 23;
349
350 host = simple_strtoul(p, &p, 0);
351 channel = simple_strtoul(p + 1, &p, 0);
352 id = simple_strtoul(p + 1, &p, 0);
353 lun = simple_strtoul(p + 1, &p, 0);
354
355 err = scsi_add_single_device(host, channel, id, lun);
356
357
358
359
360
361 } else if (!strncmp("scsi remove-single-device", buffer, 25)) {
362 p = buffer + 26;
363
364 host = simple_strtoul(p, &p, 0);
365 channel = simple_strtoul(p + 1, &p, 0);
366 id = simple_strtoul(p + 1, &p, 0);
367 lun = simple_strtoul(p + 1, &p, 0);
368
369 err = scsi_remove_single_device(host, channel, id, lun);
370 }
371
372
373
374
375
376 if (!err)
377 err = length;
378
379 out:
380 free_page((unsigned long)buffer);
381 return err;
382}
383
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386
387
388
389static int proc_scsi_show(struct seq_file *s, void *p)
390{
391 seq_printf(s, "Attached devices:\n");
392 bus_for_each_dev(&scsi_bus_type, NULL, s, proc_print_scsidevice);
393 return 0;
394}
395
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401
402
403static int proc_scsi_open(struct inode *inode, struct file *file)
404{
405
406
407
408
409 return single_open(file, proc_scsi_show, NULL);
410}
411
412static const struct file_operations proc_scsi_operations = {
413 .owner = THIS_MODULE,
414 .open = proc_scsi_open,
415 .read = seq_read,
416 .write = proc_scsi_write,
417 .llseek = seq_lseek,
418 .release = single_release,
419};
420
421
422
423
424int __init scsi_init_procfs(void)
425{
426 struct proc_dir_entry *pde;
427
428 proc_scsi = proc_mkdir("scsi", NULL);
429 if (!proc_scsi)
430 goto err1;
431
432 pde = proc_create("scsi/scsi", 0, NULL, &proc_scsi_operations);
433 if (!pde)
434 goto err2;
435
436 return 0;
437
438err2:
439 remove_proc_entry("scsi", NULL);
440err1:
441 return -ENOMEM;
442}
443
444
445
446
447void scsi_exit_procfs(void)
448{
449 remove_proc_entry("scsi/scsi", NULL);
450 remove_proc_entry("scsi", NULL);
451}
452