ide-proc.c

Linux Kernel 2.6.9 for OMAP1710

	down(&ide_setting_sem);
	out += sprintf(out, "name\t\t\tvalue\t\tmin\t\tmax\t\tmode\n");
	out += sprintf(out, "----\t\t\t-----\t\t---\t\t---\t\t----\n");
	while(setting) {
		mul_factor = setting->mul_factor;
		div_factor = setting->div_factor;
		out += sprintf(out, "%-24s", setting->name);
		if ((rc = ide_read_setting(drive, setting)) >= 0)
			out += sprintf(out, "%-16d", rc * mul_factor / div_factor);
		else
			out += sprintf(out, "%-16s", "write-only");
		out += sprintf(out, "%-16d%-16d", (setting->min * mul_factor + div_factor - 1) / div_factor, setting->max * mul_factor / div_factor);
		if (setting->rw & SETTING_READ)
			out += sprintf(out, "r");
		if (setting->rw & SETTING_WRITE)
			out += sprintf(out, "w");
		out += sprintf(out, "\n");
		setting = setting->next;
	}
	len = out - page;
	up(&ide_setting_sem);
	PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
}

#define MAX_LEN	30

static int proc_ide_write_settings(struct file *file, const char __user *buffer,
				   unsigned long count, void *data)
{
	ide_drive_t	*drive = (ide_drive_t *) data;
	char		name[MAX_LEN + 1];
	int		for_real = 0;
	unsigned long	n;
	ide_settings_t	*setting;
	char *buf, *s;

	if (!capable(CAP_SYS_ADMIN))
		return -EACCES;

	if (count >= PAGE_SIZE)
		return -EINVAL;

	s = buf = (char *)__get_free_page(GFP_USER);
	if (!buf)
		return -ENOMEM;

	if (copy_from_user(buf, buffer, count)) {
		free_page((unsigned long)buf);
		return -EFAULT;
	}

	buf[count] = '\0';

	/*
	 * Skip over leading whitespace
	 */
	while (count && isspace(*s)) {
		--count;
		++s;
	}
	/*
	 * Do one full pass to verify all parameters,
	 * then do another to actually write the new settings.
	 */
	do {
		char *p = s;
		n = count;
		while (n > 0) {
			unsigned val;
			char *q = p;

			while (n > 0 && *p != ':') {
				--n;
				p++;
			}
			if (*p != ':')
				goto parse_error;
			if (p - q > MAX_LEN)
				goto parse_error;
			memcpy(name, q, p - q);
			name[p - q] = 0;

			if (n > 0) {
				--n;
				p++;
			} else
				goto parse_error;

			val = simple_strtoul(p, &q, 10);
			n -= q - p;
			p = q;
			if (n > 0 && !isspace(*p))
				goto parse_error;
			while (n > 0 && isspace(*p)) {
				--n;
				++p;
			}

			down(&ide_setting_sem);
			setting = ide_find_setting_by_name(drive, name);
			if (!setting)
			{
				up(&ide_setting_sem);
				goto parse_error;
			}
			if (for_real)
				ide_write_setting(drive, setting, val * setting->div_factor / setting->mul_factor);
			up(&ide_setting_sem);
		}
	} while (!for_real++);
	free_page((unsigned long)buf);
	return count;
parse_error:
	free_page((unsigned long)buf);
	printk("proc_ide_write_settings(): parse error\n");
	return -EINVAL;
}

int proc_ide_read_capacity
	(char *page, char **start, off_t off, int count, int *eof, void *data)
{
	ide_drive_t	*drive = (ide_drive_t *) data;
	int		len;

	len = sprintf(page,"%llu\n",
		      (long long) (DRIVER(drive)->capacity(drive)));
	PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
}

int proc_ide_read_geometry
	(char *page, char **start, off_t off, int count, int *eof, void *data)
{
	ide_drive_t	*drive = (ide_drive_t *) data;
	char		*out = page;
	int		len;

	out += sprintf(out,"physical     %d/%d/%d\n",
			drive->cyl, drive->head, drive->sect);
	out += sprintf(out,"logical      %d/%d/%d\n",
			drive->bios_cyl, drive->bios_head, drive->bios_sect);

	len = out - page;
	PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
}

EXPORT_SYMBOL(proc_ide_read_geometry);

static int proc_ide_read_dmodel
	(char *page, char **start, off_t off, int count, int *eof, void *data)
{
	ide_drive_t	*drive = (ide_drive_t *) data;
	struct hd_driveid *id = drive->id;
	int		len;

	len = sprintf(page, "%.40s\n",
		(id && id->model[0]) ? (char *)id->model : "(none)");
	PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
}

static int proc_ide_read_driver
	(char *page, char **start, off_t off, int count, int *eof, void *data)
{
	ide_drive_t	*drive = (ide_drive_t *) data;
	ide_driver_t	*driver = drive->driver;
	int		len;

	len = sprintf(page, "%s version %s\n",
			driver->name, driver->version);
	PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
}

static int proc_ide_write_driver
	(struct file *file, const char __user *buffer, unsigned long count, void *data)
{
	ide_drive_t	*drive = (ide_drive_t *) data;
	char name[32];

	if (!capable(CAP_SYS_ADMIN))
		return -EACCES;
	if (count > 31)
		count = 31;
	if (copy_from_user(name, buffer, count))
		return -EFAULT;
	name[count] = '\0';
	if (ide_replace_subdriver(drive, name))
		return -EINVAL;
	return count;
}

static int proc_ide_read_media
	(char *page, char **start, off_t off, int count, int *eof, void *data)
{
	ide_drive_t	*drive = (ide_drive_t *) data;
	const char	*media;
	int		len;

	switch (drive->media) {
		case ide_disk:	media = "disk\n";
				break;
		case ide_cdrom:	media = "cdrom\n";
				break;
		case ide_tape:	media = "tape\n";
				break;
		case ide_floppy:media = "floppy\n";
				break;
		default:	media = "UNKNOWN\n";
				break;
	}
	strcpy(page,media);
	len = strlen(media);
	PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
}

static ide_proc_entry_t generic_drive_entries[] = {
	{ "driver",	S_IFREG|S_IRUGO,	proc_ide_read_driver,	proc_ide_write_driver },
	{ "identify",	S_IFREG|S_IRUSR,	proc_ide_read_identify,	NULL },
	{ "media",	S_IFREG|S_IRUGO,	proc_ide_read_media,	NULL },
	{ "model",	S_IFREG|S_IRUGO,	proc_ide_read_dmodel,	NULL },
	{ "settings",	S_IFREG|S_IRUSR|S_IWUSR,proc_ide_read_settings,	proc_ide_write_settings },
	{ NULL,	0, NULL, NULL }
};

void ide_add_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p, void *data)
{
	struct proc_dir_entry *ent;

	if (!dir || !p)
		return;
	while (p->name != NULL) {
		ent = create_proc_entry(p->name, p->mode, dir);
		if (!ent) return;
		ent->nlink = 1;
		ent->data = data;
		ent->read_proc = p->read_proc;
		ent->write_proc = p->write_proc;
		p++;
	}
}

void ide_remove_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p)
{
	if (!dir || !p)
		return;
	while (p->name != NULL) {
		remove_proc_entry(p->name, dir);
		p++;
	}
}

static void create_proc_ide_drives(ide_hwif_t *hwif)
{
	int	d;
	struct proc_dir_entry *ent;
	struct proc_dir_entry *parent = hwif->proc;
	char name[64];

	for (d = 0; d < MAX_DRIVES; d++) {
		ide_drive_t *drive = &hwif->drives[d];

		if (!drive->present)
			continue;
		if (drive->proc)
			continue;

		drive->proc = proc_mkdir(drive->name, parent);
		if (drive->proc)
			ide_add_proc_entries(drive->proc, generic_drive_entries, drive);
		sprintf(name,"ide%d/%s", (drive->name[2]-'a')/2, drive->name);
		ent = proc_symlink(drive->name, proc_ide_root, name);
		if (!ent) return;
	}
}

static void destroy_proc_ide_device(ide_hwif_t *hwif, ide_drive_t *drive)
{
	ide_driver_t *driver = drive->driver;

	if (drive->proc) {
		ide_remove_proc_entries(drive->proc, driver->proc);
		ide_remove_proc_entries(drive->proc, generic_drive_entries);
		remove_proc_entry(drive->name, proc_ide_root);
		remove_proc_entry(drive->name, hwif->proc);
		drive->proc = NULL;
	}
}

void destroy_proc_ide_drives(ide_hwif_t *hwif)
{
	int	d;

	for (d = 0; d < MAX_DRIVES; d++) {
		ide_drive_t *drive = &hwif->drives[d];
		if (drive->proc)
			destroy_proc_ide_device(hwif, drive);
	}
}

static ide_proc_entry_t hwif_entries[] = {
	{ "channel",	S_IFREG|S_IRUGO,	proc_ide_read_channel,	NULL },
	{ "config",	S_IFREG|S_IRUGO|S_IWUSR,proc_ide_read_config,	proc_ide_write_config },
	{ "mate",	S_IFREG|S_IRUGO,	proc_ide_read_mate,	NULL },
	{ "model",	S_IFREG|S_IRUGO,	proc_ide_read_imodel,	NULL },
	{ NULL,	0, NULL, NULL }
};

void create_proc_ide_interfaces(void)
{
	int	h;

	for (h = 0; h < MAX_HWIFS; h++) {
		ide_hwif_t *hwif = &ide_hwifs[h];

		if (!hwif->present)
			continue;
		if (!hwif->proc) {
			hwif->proc = proc_mkdir(hwif->name, proc_ide_root);
			if (!hwif->proc)
				return;
			ide_add_proc_entries(hwif->proc, hwif_entries, hwif);
		}
		create_proc_ide_drives(hwif);
	}
}

EXPORT_SYMBOL(create_proc_ide_interfaces);

#ifdef CONFIG_BLK_DEV_IDEPCI
void ide_pci_create_host_proc(const char *name, get_info_t *get_info)
{
	create_proc_info_entry(name, 0, proc_ide_root, get_info);
}

EXPORT_SYMBOL_GPL(ide_pci_create_host_proc);
#endif

void destroy_proc_ide_interfaces(void)
{
	int	h;

	for (h = 0; h < MAX_HWIFS; h++) {
		ide_hwif_t *hwif = &ide_hwifs[h];
		int exist = (hwif->proc != NULL);
#if 0
		if (!hwif->present)
			continue;
#endif
		if (exist) {
			destroy_proc_ide_drives(hwif);
			ide_remove_proc_entries(hwif->proc, hwif_entries);
			remove_proc_entry(hwif->name, proc_ide_root);
			hwif->proc = NULL;
		} else
			continue;
	}
}

EXPORT_SYMBOL(destroy_proc_ide_interfaces);

extern struct seq_operations ide_drivers_op;
static int ide_drivers_open(struct inode *inode, struct file *file)
{
	return seq_open(file, &ide_drivers_op);
}
static struct file_operations ide_drivers_operations = {
	.open		= ide_drivers_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= seq_release,
};

void proc_ide_create(void)
{
	struct proc_dir_entry *entry;

	if (!proc_ide_root)
		return;

	create_proc_ide_interfaces();

	entry = create_proc_entry("drivers", 0, proc_ide_root);
	if (entry)
		entry->proc_fops = &ide_drivers_operations;
}

void proc_ide_destroy(void)
{
	remove_proc_entry("ide/drivers", proc_ide_root);
	destroy_proc_ide_interfaces();
	remove_proc_entry("ide", NULL);
}