[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / scsi / scsi_proc.c

/*
 * linux/drivers/scsi/scsi_proc.c
 *
 * The functions in this file provide an interface between
 * the PROC file system and the SCSI device drivers
 * It is mainly used for debugging, statistics and to pass 
 * information directly to the lowlevel driver.
 *
 * (c) 1995 Michael Neuffer neuffer@goofy.zdv.uni-mainz.de 
 * Version: 0.99.8   last change: 95/09/13
 * 
 * generic command parser provided by: 
 * Andreas Heilwagen <crashcar@informatik.uni-koblenz.de>
 *
 * generic_proc_info() support of xxxx_info() by:
 * Michael A. Griffith <grif@acm.org>
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/proc_fs.h>
#include <linux/errno.h>
#include <linux/blkdev.h>
#include <linux/seq_file.h>
#include <linux/mutex.h>
#include <asm/uaccess.h>

#include <scsi/scsi.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>

#include "scsi_priv.h"
#include "scsi_logging.h"


/* 4K page size, but our output routines, use some slack for overruns */
#define PROC_BLOCK_SIZE (3*1024)

static struct proc_dir_entry *proc_scsi;

/* Protect sht->present and sht->proc_dir */
static DEFINE_MUTEX(global_host_template_mutex);

static int proc_scsi_read(char *buffer, char **start, off_t offset,
			  int length, int *eof, void *data)
{
	struct Scsi_Host *shost = data;
	int n;

	n = shost->hostt->proc_info(shost, buffer, start, offset, length, 0);
	*eof = (n < length);

	return n;
}

static int proc_scsi_write_proc(struct file *file, const char __user *buf,
                           unsigned long count, void *data)
{
	struct Scsi_Host *shost = data;
	ssize_t ret = -ENOMEM;
	char *page;
	char *start;
    
	if (count > PROC_BLOCK_SIZE)
		return -EOVERFLOW;

	page = (char *)__get_free_page(GFP_KERNEL);
	if (page) {
		ret = -EFAULT;
		if (copy_from_user(page, buf, count))
			goto out;
		ret = shost->hostt->proc_info(shost, page, &start, 0, count, 1);
	}
out:
	free_page((unsigned long)page);
	return ret;
}

void scsi_proc_hostdir_add(struct scsi_host_template *sht)
{
	if (!sht->proc_info)
		return;

	mutex_lock(&global_host_template_mutex);
	if (!sht->present++) {
		sht->proc_dir = proc_mkdir(sht->proc_name, proc_scsi);
        	if (!sht->proc_dir)
			printk(KERN_ERR "%s: proc_mkdir failed for %s\n",
			       __FUNCTION__, sht->proc_name);
		else
			sht->proc_dir->owner = sht->module;
	}
	mutex_unlock(&global_host_template_mutex);
}

void scsi_proc_hostdir_rm(struct scsi_host_template *sht)
{
	if (!sht->proc_info)
		return;

	mutex_lock(&global_host_template_mutex);
	if (!--sht->present && sht->proc_dir) {
		remove_proc_entry(sht->proc_name, proc_scsi);
		sht->proc_dir = NULL;
	}
	mutex_unlock(&global_host_template_mutex);
}

void scsi_proc_host_add(struct Scsi_Host *shost)
{
	struct scsi_host_template *sht = shost->hostt;
	struct proc_dir_entry *p;
	char name[10];

	if (!sht->proc_dir)
		return;

	sprintf(name,"%d", shost->host_no);
	p = create_proc_read_entry(name, S_IFREG | S_IRUGO | S_IWUSR,
			sht->proc_dir, proc_scsi_read, shost);
	if (!p) {
		printk(KERN_ERR "%s: Failed to register host %d in"
		       "%s\n", __FUNCTION__, shost->host_no,
		       sht->proc_name);
		return;
	} 

	p->write_proc = proc_scsi_write_proc;
	p->owner = sht->module;
}

void scsi_proc_host_rm(struct Scsi_Host *shost)
{
	char name[10];

	if (!shost->hostt->proc_dir)
		return;

	sprintf(name,"%d", shost->host_no);
	remove_proc_entry(name, shost->hostt->proc_dir);
}

static int proc_print_scsidevice(struct device *dev, void *data)
{
	struct scsi_device *sdev = to_scsi_device(dev);
	struct seq_file *s = data;
	int i;

	seq_printf(s,
		"Host: scsi%d Channel: %02d Id: %02d Lun: %02d\n  Vendor: ",
		sdev->host->host_no, sdev->channel, sdev->id, sdev->lun);
	for (i = 0; i < 8; i++) {
		if (sdev->vendor[i] >= 0x20)
			seq_printf(s, "%c", sdev->vendor[i]);
		else
			seq_printf(s, " ");
	}

	seq_printf(s, " Model: ");
	for (i = 0; i < 16; i++) {
		if (sdev->model[i] >= 0x20)
			seq_printf(s, "%c", sdev->model[i]);
		else
			seq_printf(s, " ");
	}

	seq_printf(s, " Rev: ");
	for (i = 0; i < 4; i++) {
		if (sdev->rev[i] >= 0x20)
			seq_printf(s, "%c", sdev->rev[i]);
		else
			seq_printf(s, " ");
	}

	seq_printf(s, "\n");

	seq_printf(s, "  Type:   %s ",
		     sdev->type < MAX_SCSI_DEVICE_CODE ?
	       scsi_device_types[(int) sdev->type] : "Unknown          ");
	seq_printf(s, "               ANSI"
		     " SCSI revision: %02x", (sdev->scsi_level - 1) ?
		     sdev->scsi_level - 1 : 1);
	if (sdev->scsi_level == 2)
		seq_printf(s, " CCS\n");
	else
		seq_printf(s, "\n");

	return 0;
}

static int scsi_add_single_device(uint host, uint channel, uint id, uint lun)
{
	struct Scsi_Host *shost;
	int error = -ENXIO;

	shost = scsi_host_lookup(host);
	if (IS_ERR(shost))
		return PTR_ERR(shost);

	error = scsi_scan_host_selected(shost, channel, id, lun, 1);
	scsi_host_put(shost);
	return error;
}

static int scsi_remove_single_device(uint host, uint channel, uint id, uint lun)
{
	struct scsi_device *sdev;
	struct Scsi_Host *shost;
	int error = -ENXIO;

	shost = scsi_host_lookup(host);
	if (IS_ERR(shost))
		return PTR_ERR(shost);
	sdev = scsi_device_lookup(shost, channel, id, lun);
	if (sdev) {
		scsi_remove_device(sdev);
		scsi_device_put(sdev);
		error = 0;
	}

	scsi_host_put(shost);
	return error;
}

static ssize_t proc_scsi_write(struct file *file, const char __user *buf,
			       size_t length, loff_t *ppos)
{
	int host, channel, id, lun;
	char *buffer, *p;
	int err;

	if (!buf || length > PAGE_SIZE)
		return -EINVAL;

	buffer = (char *)__get_free_page(GFP_KERNEL);
	if (!buffer)
		return -ENOMEM;

	err = -EFAULT;
	if (copy_from_user(buffer, buf, length))
		goto out;

	err = -EINVAL;
	if (length < PAGE_SIZE)
		buffer[length] = '\0';
	else if (buffer[PAGE_SIZE-1])
		goto out;

	/*
	 * Usage: echo "scsi add-single-device 0 1 2 3" >/proc/scsi/scsi
	 * with  "0 1 2 3" replaced by your "Host Channel Id Lun".
	 */
	if (!strncmp("scsi add-single-device", buffer, 22)) {
		p = buffer + 23;

		host = simple_strtoul(p, &p, 0);
		channel = simple_strtoul(p + 1, &p, 0);
		id = simple_strtoul(p + 1, &p, 0);
		lun = simple_strtoul(p + 1, &p, 0);

		err = scsi_add_single_device(host, channel, id, lun);
		if (err >= 0)
			err = length;

	/*
	 * Usage: echo "scsi remove-single-device 0 1 2 3" >/proc/scsi/scsi
	 * with  "0 1 2 3" replaced by your "Host Channel Id Lun".
	 */
	} else if (!strncmp("scsi remove-single-device", buffer, 25)) {
		p = buffer + 26;

		host = simple_strtoul(p, &p, 0);
		channel = simple_strtoul(p + 1, &p, 0);
		id = simple_strtoul(p + 1, &p, 0);
		lun = simple_strtoul(p + 1, &p, 0);

		err = scsi_remove_single_device(host, channel, id, lun);
	}

 out:
	free_page((unsigned long)buffer);
	return err;
}

static int proc_scsi_show(struct seq_file *s, void *p)
{
	seq_printf(s, "Attached devices:\n");
	bus_for_each_dev(&scsi_bus_type, NULL, s, proc_print_scsidevice);
	return 0;
}

static int proc_scsi_open(struct inode *inode, struct file *file)
{
	/*
	 * We don't really needs this for the write case but it doesn't
	 * harm either.
	 */
	return single_open(file, proc_scsi_show, NULL);
}

static struct file_operations proc_scsi_operations = {
	.open		= proc_scsi_open,
	.read		= seq_read,
	.write		= proc_scsi_write,
	.llseek		= seq_lseek,
	.release	= single_release,
};

int __init scsi_init_procfs(void)
{
	struct proc_dir_entry *pde;

	proc_scsi = proc_mkdir("scsi", NULL);
	if (!proc_scsi)
		goto err1;

	pde = create_proc_entry("scsi/scsi", 0, NULL);
	if (!pde)
		goto err2;
	pde->proc_fops = &proc_scsi_operations;

	return 0;

err2:
	remove_proc_entry("scsi", NULL);
err1:
	return -ENOMEM;
}

void scsi_exit_procfs(void)
{
	remove_proc_entry("scsi/scsi", NULL);
	remove_proc_entry("scsi", NULL);
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/drivers/scsi/scsi_proc.c
	3	*
	4	* The functions in this file provide an interface between
	5	* the PROC file system and the SCSI device drivers
	6	* It is mainly used for debugging, statistics and to pass
	7	* information directly to the lowlevel driver.
	8	*
	9	* (c) 1995 Michael Neuffer neuffer@goofy.zdv.uni-mainz.de
	10	* Version: 0.99.8 last change: 95/09/13
	11	*
	12	* generic command parser provided by:
	13	* Andreas Heilwagen <crashcar@informatik.uni-koblenz.de>
	14	*
	15	* generic_proc_info() support of xxxx_info() by:
	16	* Michael A. Griffith <grif@acm.org>
	17	*/
	18
	19	#include <linux/module.h>
	20	#include <linux/init.h>
	21	#include <linux/string.h>
	22	#include <linux/mm.h>
	23	#include <linux/slab.h>
	24	#include <linux/proc_fs.h>
	25	#include <linux/errno.h>
	26	#include <linux/blkdev.h>
	27	#include <linux/seq_file.h>
0b950672	28	#include <linux/mutex.h>
1da177e4 LT	29	#include <asm/uaccess.h>
	30
	31	#include <scsi/scsi.h>
	32	#include <scsi/scsi_device.h>
	33	#include <scsi/scsi_host.h>
	34
	35	#include "scsi_priv.h"
	36	#include "scsi_logging.h"
	37
	38
	39	/* 4K page size, but our output routines, use some slack for overruns */
	40	#define PROC_BLOCK_SIZE (3*1024)
	41
	42	static struct proc_dir_entry *proc_scsi;
	43
	44	/* Protect sht->present and sht->proc_dir */
0b950672	45	static DEFINE_MUTEX(global_host_template_mutex);
1da177e4 LT	46
	47	static int proc_scsi_read(char buffer, char *start, off_t offset,
	48	int length, int eof, void data)
	49	{
	50	struct Scsi_Host *shost = data;
	51	int n;
	52
	53	n = shost->hostt->proc_info(shost, buffer, start, offset, length, 0);
	54	*eof = (n < length);
	55
	56	return n;
	57	}
	58
	59	static int proc_scsi_write_proc(struct file file, const char __user buf,
	60	unsigned long count, void *data)
	61	{
	62	struct Scsi_Host *shost = data;
	63	ssize_t ret = -ENOMEM;
	64	char *page;
	65	char *start;
	66
	67	if (count > PROC_BLOCK_SIZE)
	68	return -EOVERFLOW;
	69
	70	page = (char *)__get_free_page(GFP_KERNEL);
	71	if (page) {
	72	ret = -EFAULT;
	73	if (copy_from_user(page, buf, count))
	74	goto out;
	75	ret = shost->hostt->proc_info(shost, page, &start, 0, count, 1);
	76	}
	77	out:
	78	free_page((unsigned long)page);
	79	return ret;
	80	}
	81
	82	void scsi_proc_hostdir_add(struct scsi_host_template *sht)
	83	{
	84	if (!sht->proc_info)
	85	return;
	86
0b950672	87	mutex_lock(&global_host_template_mutex);
1da177e4 LT	88	if (!sht->present++) {
	89	sht->proc_dir = proc_mkdir(sht->proc_name, proc_scsi);
	90	if (!sht->proc_dir)
	91	printk(KERN_ERR "%s: proc_mkdir failed for %s\n",
	92	__FUNCTION__, sht->proc_name);
	93	else
	94	sht->proc_dir->owner = sht->module;
	95	}
0b950672	96	mutex_unlock(&global_host_template_mutex);
1da177e4 LT	97	}
	98
	99	void scsi_proc_hostdir_rm(struct scsi_host_template *sht)
	100	{
	101	if (!sht->proc_info)
	102	return;
	103
0b950672	104	mutex_lock(&global_host_template_mutex);
1da177e4 LT	105	if (!--sht->present && sht->proc_dir) {
	106	remove_proc_entry(sht->proc_name, proc_scsi);
	107	sht->proc_dir = NULL;
	108	}
0b950672	109	mutex_unlock(&global_host_template_mutex);
1da177e4 LT	110	}
	111
	112	void scsi_proc_host_add(struct Scsi_Host *shost)
	113	{
	114	struct scsi_host_template *sht = shost->hostt;
	115	struct proc_dir_entry *p;
	116	char name[10];
	117
	118	if (!sht->proc_dir)
	119	return;
	120
	121	sprintf(name,"%d", shost->host_no);
	122	p = create_proc_read_entry(name, S_IFREG \| S_IRUGO \| S_IWUSR,
	123	sht->proc_dir, proc_scsi_read, shost);
	124	if (!p) {
	125	printk(KERN_ERR "%s: Failed to register host %d in"
	126	"%s\n", __FUNCTION__, shost->host_no,
	127	sht->proc_name);
	128	return;
	129	}
	130
	131	p->write_proc = proc_scsi_write_proc;
	132	p->owner = sht->module;
	133	}
	134
	135	void scsi_proc_host_rm(struct Scsi_Host *shost)
	136	{
	137	char name[10];
	138
	139	if (!shost->hostt->proc_dir)
	140	return;
	141
	142	sprintf(name,"%d", shost->host_no);
	143	remove_proc_entry(name, shost->hostt->proc_dir);
	144	}
	145
	146	static int proc_print_scsidevice(struct device dev, void data)
	147	{
	148	struct scsi_device *sdev = to_scsi_device(dev);
	149	struct seq_file *s = data;
	150	int i;
	151
	152	seq_printf(s,
	153	"Host: scsi%d Channel: %02d Id: %02d Lun: %02d\n Vendor: ",
	154	sdev->host->host_no, sdev->channel, sdev->id, sdev->lun);
	155	for (i = 0; i < 8; i++) {
	156	if (sdev->vendor[i] >= 0x20)
	157	seq_printf(s, "%c", sdev->vendor[i]);
	158	else
	159	seq_printf(s, " ");
	160	}
	161
	162	seq_printf(s, " Model: ");
	163	for (i = 0; i < 16; i++) {
	164	if (sdev->model[i] >= 0x20)
	165	seq_printf(s, "%c", sdev->model[i]);
	166	else
	167	seq_printf(s, " ");
	168	}
	169
	170	seq_printf(s, " Rev: ");
	171	for (i = 0; i < 4; i++) {
	172	if (sdev->rev[i] >= 0x20)
	173	seq_printf(s, "%c", sdev->rev[i]);
174	else
175	seq_printf(s, " ");
176	}
177
178	seq_printf(s, "\n");
179
180	seq_printf(s, " Type: %s ",
181	sdev->type < MAX_SCSI_DEVICE_CODE ?
182	scsi_device_types[(int) sdev->type] : "Unknown ");
183	seq_printf(s, " ANSI"
184	" SCSI revision: %02x", (sdev->scsi_level - 1) ?
185	sdev->scsi_level - 1 : 1);
186	if (sdev->scsi_level == 2)
187	seq_printf(s, " CCS\n");
188	else
189	seq_printf(s, "\n");
190
191	return 0;
192	}
193
194	static int scsi_add_single_device(uint host, uint channel, uint id, uint lun)
195	{
196	struct Scsi_Host *shost;
197	int error = -ENXIO;
198
199	shost = scsi_host_lookup(host);
200	if (IS_ERR(shost))
201	return PTR_ERR(shost);
202
203	error = scsi_scan_host_selected(shost, channel, id, lun, 1);
204	scsi_host_put(shost);
205	return error;
206	}
207
208	static int scsi_remove_single_device(uint host, uint channel, uint id, uint lun)
209	{
210	struct scsi_device *sdev;
211	struct Scsi_Host *shost;
212	int error = -ENXIO;
213
214	shost = scsi_host_lookup(host);
215	if (IS_ERR(shost))
216	return PTR_ERR(shost);
217	sdev = scsi_device_lookup(shost, channel, id, lun);
218	if (sdev) {
219	scsi_remove_device(sdev);
220	scsi_device_put(sdev);
221	error = 0;
222	}
223
224	scsi_host_put(shost);
225	return error;
226	}
227
228	static ssize_t proc_scsi_write(struct file file, const char __user buf,
229	size_t length, loff_t *ppos)
230	{
231	int host, channel, id, lun;
232	char buffer, p;
233	int err;
234
235	if (!buf \|\| length > PAGE_SIZE)
236	return -EINVAL;
237
238	buffer = (char *)__get_free_page(GFP_KERNEL);
239	if (!buffer)
240	return -ENOMEM;
241
242	err = -EFAULT;
243	if (copy_from_user(buffer, buf, length))
244	goto out;
245
246	err = -EINVAL;
247	if (length < PAGE_SIZE)
248	buffer[length] = '\0';
249	else if (buffer[PAGE_SIZE-1])
250	goto out;
251
252	/*
253	* Usage: echo "scsi add-single-device 0 1 2 3" >/proc/scsi/scsi
254	* with "0 1 2 3" replaced by your "Host Channel Id Lun".
255	*/
256	if (!strncmp("scsi add-single-device", buffer, 22)) {
257	p = buffer + 23;
258
259	host = simple_strtoul(p, &p, 0);
260	channel = simple_strtoul(p + 1, &p, 0);
261	id = simple_strtoul(p + 1, &p, 0);
262	lun = simple_strtoul(p + 1, &p, 0);
263
264	err = scsi_add_single_device(host, channel, id, lun);
265	if (err >= 0)
266	err = length;
267
268	/*
269	* Usage: echo "scsi remove-single-device 0 1 2 3" >/proc/scsi/scsi
270	* with "0 1 2 3" replaced by your "Host Channel Id Lun".
271	*/
272	} else if (!strncmp("scsi remove-single-device", buffer, 25)) {
273	p = buffer + 26;
274
275	host = simple_strtoul(p, &p, 0);
276	channel = simple_strtoul(p + 1, &p, 0);
277	id = simple_strtoul(p + 1, &p, 0);
278	lun = simple_strtoul(p + 1, &p, 0);
279
280	err = scsi_remove_single_device(host, channel, id, lun);
281	}
282
283	out:
284	free_page((unsigned long)buffer);
285	return err;
286	}
287
288	static int proc_scsi_show(struct seq_file s, void p)
289	{
290	seq_printf(s, "Attached devices:\n");
291	bus_for_each_dev(&scsi_bus_type, NULL, s, proc_print_scsidevice);
292	return 0;
293	}
294
295	static int proc_scsi_open(struct inode inode, struct file file)
296	{
297	/*
298	* We don't really needs this for the write case but it doesn't
299	* harm either.
300	*/
301	return single_open(file, proc_scsi_show, NULL);
302	}
303
304	static struct file_operations proc_scsi_operations = {
305	.open = proc_scsi_open,
306	.read = seq_read,
307	.write = proc_scsi_write,
308	.llseek = seq_lseek,
309	.release = single_release,
310	};
311
312	int __init scsi_init_procfs(void)
313	{
314	struct proc_dir_entry *pde;
315
316	proc_scsi = proc_mkdir("scsi", NULL);
317	if (!proc_scsi)
318	goto err1;
319
320	pde = create_proc_entry("scsi/scsi", 0, NULL);
321	if (!pde)
322	goto err2;
323	pde->proc_fops = &proc_scsi_operations;
324
325	return 0;
326
327	err2:
328	remove_proc_entry("scsi", NULL);
329	err1:
330	return -ENOMEM;
331	}
332
333	void scsi_exit_procfs(void)
334	{
335	remove_proc_entry("scsi/scsi", NULL);
336	remove_proc_entry("scsi", NULL);
337	}