debugfs.c

linux内核源码

#include <linux/module.h>
#include <linux/dcache.h>
#include <linux/debugfs.h>
#include <linux/delay.h>
#include <linux/mm.h>
#include <linux/string.h>
#include <net/iw_handler.h>

#include "dev.h"
#include "decl.h"
#include "host.h"
#include "debugfs.h"

static struct dentry *libertas_dir = NULL;
static char *szStates[] = {
	"Connected",
	"Disconnected"
};

#ifdef PROC_DEBUG
static void libertas_debug_init(wlan_private * priv, struct net_device *dev);
#endif

static int open_file_generic(struct inode *inode, struct file *file)
{
	file->private_data = inode->i_private;
	return 0;
}

static ssize_t write_file_dummy(struct file *file, const char __user *buf,
                                size_t count, loff_t *ppos)
{
        return -EINVAL;
}

static const size_t len = PAGE_SIZE;

static ssize_t libertas_dev_info(struct file *file, char __user *userbuf,
				  size_t count, loff_t *ppos)
{
	wlan_private *priv = file->private_data;
	size_t pos = 0;
	unsigned long addr = get_zeroed_page(GFP_KERNEL);
	char *buf = (char *)addr;
	ssize_t res;

	pos += snprintf(buf+pos, len-pos, "state = %s\n",
				szStates[priv->adapter->connect_status]);
	pos += snprintf(buf+pos, len-pos, "region_code = %02x\n",
				(u32) priv->adapter->regioncode);

	res = simple_read_from_buffer(userbuf, count, ppos, buf, pos);

	free_page(addr);
	return res;
}


static ssize_t libertas_getscantable(struct file *file, char __user *userbuf,
				  size_t count, loff_t *ppos)
{
	wlan_private *priv = file->private_data;
	size_t pos = 0;
	int numscansdone = 0, res;
	unsigned long addr = get_zeroed_page(GFP_KERNEL);
	char *buf = (char *)addr;
	DECLARE_MAC_BUF(mac);
	struct bss_descriptor * iter_bss;

	pos += snprintf(buf+pos, len-pos,
		"# | ch  | rssi |       bssid       |   cap    | Qual | SSID \n");

	mutex_lock(&priv->adapter->lock);
	list_for_each_entry (iter_bss, &priv->adapter->network_list, list) {
		u16 ibss = (iter_bss->capability & WLAN_CAPABILITY_IBSS);
		u16 privacy = (iter_bss->capability & WLAN_CAPABILITY_PRIVACY);
		u16 spectrum_mgmt = (iter_bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT);

		pos += snprintf(buf+pos, len-pos,
			"%02u| %03d | %04ld | %s |",
			numscansdone, iter_bss->channel, iter_bss->rssi,
			print_mac(mac, iter_bss->bssid));
		pos += snprintf(buf+pos, len-pos, " %04x-", iter_bss->capability);
		pos += snprintf(buf+pos, len-pos, "%c%c%c |",
				ibss ? 'A' : 'I', privacy ? 'P' : ' ',
				spectrum_mgmt ? 'S' : ' ');
		pos += snprintf(buf+pos, len-pos, " %04d |", SCAN_RSSI(iter_bss->rssi));
		pos += snprintf(buf+pos, len-pos, " %s\n",
		                escape_essid(iter_bss->ssid, iter_bss->ssid_len));

		numscansdone++;
	}
	mutex_unlock(&priv->adapter->lock);

	res = simple_read_from_buffer(userbuf, count, ppos, buf, pos);

	free_page(addr);
	return res;
}

static ssize_t libertas_sleepparams_write(struct file *file,
				const char __user *user_buf, size_t count,
				loff_t *ppos)
{
	wlan_private *priv = file->private_data;
	ssize_t buf_size, res;
	int p1, p2, p3, p4, p5, p6;
	unsigned long addr = get_zeroed_page(GFP_KERNEL);
	char *buf = (char *)addr;

	buf_size = min(count, len - 1);
	if (copy_from_user(buf, user_buf, buf_size)) {
		res = -EFAULT;
		goto out_unlock;
	}
	res = sscanf(buf, "%d %d %d %d %d %d", &p1, &p2, &p3, &p4, &p5, &p6);
	if (res != 6) {
		res = -EFAULT;
		goto out_unlock;
	}
	priv->adapter->sp.sp_error = p1;
	priv->adapter->sp.sp_offset = p2;
	priv->adapter->sp.sp_stabletime = p3;
	priv->adapter->sp.sp_calcontrol = p4;
	priv->adapter->sp.sp_extsleepclk = p5;
	priv->adapter->sp.sp_reserved = p6;

        res = libertas_prepare_and_send_command(priv,
				CMD_802_11_SLEEP_PARAMS,
				CMD_ACT_SET,
				CMD_OPTION_WAITFORRSP, 0, NULL);

	if (!res)
		res = count;
	else
		res = -EINVAL;

out_unlock:
	free_page(addr);
	return res;
}

static ssize_t libertas_sleepparams_read(struct file *file, char __user *userbuf,
				  size_t count, loff_t *ppos)
{
	wlan_private *priv = file->private_data;
	wlan_adapter *adapter = priv->adapter;
	ssize_t res;
	size_t pos = 0;
	unsigned long addr = get_zeroed_page(GFP_KERNEL);
	char *buf = (char *)addr;

        res = libertas_prepare_and_send_command(priv,
				CMD_802_11_SLEEP_PARAMS,
				CMD_ACT_GET,
				CMD_OPTION_WAITFORRSP, 0, NULL);
	if (res) {
		res = -EFAULT;
		goto out_unlock;
	}

	pos += snprintf(buf, len, "%d %d %d %d %d %d\n", adapter->sp.sp_error,
			adapter->sp.sp_offset, adapter->sp.sp_stabletime,
			adapter->sp.sp_calcontrol, adapter->sp.sp_extsleepclk,
			adapter->sp.sp_reserved);

	res = simple_read_from_buffer(userbuf, count, ppos, buf, pos);

out_unlock:
	free_page(addr);
	return res;
}

static ssize_t libertas_extscan(struct file *file, const char __user *userbuf,
				  size_t count, loff_t *ppos)
{
	wlan_private *priv = file->private_data;
	ssize_t res, buf_size;
	union iwreq_data wrqu;
	unsigned long addr = get_zeroed_page(GFP_KERNEL);
	char *buf = (char *)addr;

	buf_size = min(count, len - 1);
	if (copy_from_user(buf, userbuf, buf_size)) {
		res = -EFAULT;
		goto out_unlock;
	}

	libertas_send_specific_ssid_scan(priv, buf, strlen(buf)-1, 0);

	memset(&wrqu, 0, sizeof(union iwreq_data));
	wireless_send_event(priv->dev, SIOCGIWSCAN, &wrqu, NULL);

out_unlock:
	free_page(addr);
	return count;
}

static int libertas_parse_chan(char *buf, size_t count,
			struct wlan_ioctl_user_scan_cfg *scan_cfg, int dur)
{
	char *start, *end, *hold, *str;
	int i = 0;

	start = strstr(buf, "chan=");
	if (!start)
		return -EINVAL;
	start += 5;
	end = strchr(start, ' ');
	if (!end)
		end = buf + count;
	hold = kzalloc((end - start)+1, GFP_KERNEL);
	if (!hold)
		return -ENOMEM;
	strncpy(hold, start, end - start);
	hold[(end-start)+1] = '\0';
	while(hold && (str = strsep(&hold, ","))) {
		int chan;
		char band, passive = 0;
		sscanf(str, "%d%c%c", &chan, &band, &passive);
		scan_cfg->chanlist[i].channumber = chan;
		scan_cfg->chanlist[i].scantype = passive ? 1 : 0;
		if (band == 'b' || band == 'g')
			scan_cfg->chanlist[i].radiotype = 0;
		else if (band == 'a')
			scan_cfg->chanlist[i].radiotype = 1;

		scan_cfg->chanlist[i].scantime = dur;
		i++;
	}

	kfree(hold);
	return i;
}

static void libertas_parse_bssid(char *buf, size_t count,
                        struct wlan_ioctl_user_scan_cfg *scan_cfg)
{
	char *hold;
	unsigned int mac[ETH_ALEN];

	hold = strstr(buf, "bssid=");
	if (!hold)
		return;
	hold += 6;
	sscanf(hold, MAC_FMT, mac, mac+1, mac+2, mac+3, mac+4, mac+5);
	memcpy(scan_cfg->bssid, mac, ETH_ALEN);
}

static void libertas_parse_ssid(char *buf, size_t count,
                        struct wlan_ioctl_user_scan_cfg *scan_cfg)
{
	char *hold, *end;
	ssize_t size;

	hold = strstr(buf, "ssid=");
	if (!hold)
		return;
	hold += 5;
	end = strchr(hold, ' ');
	if (!end)
		end = buf + count - 1;

	size = min((size_t)IW_ESSID_MAX_SIZE, (size_t) (end - hold));
	strncpy(scan_cfg->ssid, hold, size);

	return;
}

static int libertas_parse_clear(char *buf, size_t count, const char *tag)
{
	char *hold;
	int val;

	hold = strstr(buf, tag);
	if (!hold)
		return 0;
	hold += strlen(tag);
	sscanf(hold, "%d", &val);

	if (val != 0)
		val = 1;

	return val;
}

static int libertas_parse_dur(char *buf, size_t count,
                        struct wlan_ioctl_user_scan_cfg *scan_cfg)
{
	char *hold;
	int val;

	hold = strstr(buf, "dur=");
	if (!hold)
		return 0;
	hold += 4;
	sscanf(hold, "%d", &val);

	return val;
}

static void libertas_parse_probes(char *buf, size_t count,
                        struct wlan_ioctl_user_scan_cfg *scan_cfg)
{
	char *hold;
	int val;

	hold = strstr(buf, "probes=");
	if (!hold)
		return;
	hold += 7;
	sscanf(hold, "%d", &val);

	scan_cfg->numprobes = val;

	return;
}

static void libertas_parse_type(char *buf, size_t count,
                        struct wlan_ioctl_user_scan_cfg *scan_cfg)
{
	char *hold;
	int val;

	hold = strstr(buf, "type=");
	if (!hold)
		return;
	hold += 5;
	sscanf(hold, "%d", &val);

	/* type=1,2 or 3 */
	if (val < 1 || val > 3)
		return;

	scan_cfg->bsstype = val;

	return;
}

static ssize_t libertas_setuserscan(struct file *file,
				    const char __user *userbuf,
				    size_t count, loff_t *ppos)
{
	wlan_private *priv = file->private_data;
	ssize_t res, buf_size;
	struct wlan_ioctl_user_scan_cfg *scan_cfg;
	union iwreq_data wrqu;
	int dur;
	unsigned long addr = get_zeroed_page(GFP_KERNEL);
	char *buf = (char *)addr;

	scan_cfg = kzalloc(sizeof(struct wlan_ioctl_user_scan_cfg), GFP_KERNEL);
	if (!scan_cfg)
		return -ENOMEM;

	buf_size = min(count, len - 1);
	if (copy_from_user(buf, userbuf, buf_size)) {
		res = -EFAULT;
		goto out_unlock;
	}

	scan_cfg->bsstype = WLAN_SCAN_BSS_TYPE_ANY;

	dur = libertas_parse_dur(buf, count, scan_cfg);
	libertas_parse_chan(buf, count, scan_cfg, dur);
	libertas_parse_bssid(buf, count, scan_cfg);
	scan_cfg->clear_bssid = libertas_parse_clear(buf, count, "clear_bssid=");
	libertas_parse_ssid(buf, count, scan_cfg);
	scan_cfg->clear_ssid = libertas_parse_clear(buf, count, "clear_ssid=");
	libertas_parse_probes(buf, count, scan_cfg);
	libertas_parse_type(buf, count, scan_cfg);

	wlan_scan_networks(priv, scan_cfg, 1);
	wait_event_interruptible(priv->adapter->cmd_pending,
				 !priv->adapter->nr_cmd_pending);

	memset(&wrqu, 0x00, sizeof(union iwreq_data));
	wireless_send_event(priv->dev, SIOCGIWSCAN, &wrqu, NULL);

out_unlock:
	free_page(addr);
	kfree(scan_cfg);
	return count;
}

static int libertas_event_initcmd(wlan_private *priv, void **response_buf,
			struct cmd_ctrl_node **cmdnode,
			struct cmd_ds_command **cmd)
{
	u16 wait_option = CMD_OPTION_WAITFORRSP;

	if (!(*cmdnode = libertas_get_free_cmd_ctrl_node(priv))) {
		lbs_deb_debugfs("failed libertas_get_free_cmd_ctrl_node\n");
		return -ENOMEM;
	}
	if (!(*response_buf = kmalloc(3000, GFP_KERNEL))) {
		lbs_deb_debugfs("failed to allocate response buffer!\n");
		return -ENOMEM;
	}
	libertas_set_cmd_ctrl_node(priv, *cmdnode, 0, wait_option, NULL);
	init_waitqueue_head(&(*cmdnode)->cmdwait_q);
	(*cmdnode)->pdata_buf = *response_buf;
	(*cmdnode)->cmdflags |= CMD_F_HOSTCMD;
	(*cmdnode)->cmdwaitqwoken = 0;
	*cmd = (struct cmd_ds_command *)(*cmdnode)->bufvirtualaddr;
	(*cmd)->command = cpu_to_le16(CMD_802_11_SUBSCRIBE_EVENT);
	(*cmd)->seqnum = cpu_to_le16(++priv->adapter->seqnum);
	(*cmd)->result = 0;
	return 0;
}

static ssize_t libertas_lowrssi_read(struct file *file, char __user *userbuf,
				  size_t count, loff_t *ppos)
{
	wlan_private *priv = file->private_data;
	wlan_adapter *adapter = priv->adapter;
	struct cmd_ctrl_node *pcmdnode;
	struct cmd_ds_command *pcmdptr;
	struct cmd_ds_802_11_subscribe_event *event;
	void *response_buf;
	int res, cmd_len;
	ssize_t pos = 0;
	unsigned long addr = get_zeroed_page(GFP_KERNEL);
	char *buf = (char *)addr;

	res = libertas_event_initcmd(priv, &response_buf, &pcmdnode, &pcmdptr);
	if (res < 0) {
		free_page(addr);
		return res;
	}

	event = &pcmdptr->params.subscribe_event;
	event->action = cpu_to_le16(CMD_ACT_GET);
	pcmdptr->size = cpu_to_le16(sizeof(*event) + S_DS_GEN);
	libertas_queue_cmd(adapter, pcmdnode, 1);
	wake_up_interruptible(&priv->waitq);

	/* Sleep until response is generated by FW */
	wait_event_interruptible(pcmdnode->cmdwait_q,
				 pcmdnode->cmdwaitqwoken);

	pcmdptr = response_buf;
	if (pcmdptr->result) {
		lbs_pr_err("%s: fail, result=%d\n", __func__,
			   le16_to_cpu(pcmdptr->result));
		kfree(response_buf);
		free_page(addr);
		return 0;
	}

	if (pcmdptr->command != cpu_to_le16(CMD_RET(CMD_802_11_SUBSCRIBE_EVENT))) {
		lbs_pr_err("command response incorrect!\n");
		kfree(response_buf);
		free_page(addr);
		return 0;
	}

	cmd_len = S_DS_GEN + sizeof(struct cmd_ds_802_11_subscribe_event);
	event = (void *)(response_buf + S_DS_GEN);
	while (cmd_len < le16_to_cpu(pcmdptr->size)) {
		struct mrvlietypesheader *header = (void *)(response_buf + cmd_len);
		switch (header->type) {
		struct mrvlietypes_rssithreshold  *Lowrssi;
		case __constant_cpu_to_le16(TLV_TYPE_RSSI_LOW):
			Lowrssi = (void *)(response_buf + cmd_len);
			pos += snprintf(buf+pos, len-pos, "%d %d %d\n",
					Lowrssi->rssivalue,
					Lowrssi->rssifreq,
					(event->events & cpu_to_le16(0x0001))?1:0);
		default:
			cmd_len += sizeof(struct mrvlietypes_snrthreshold);
			break;
		}
	}

	kfree(response_buf);
	res = simple_read_from_buffer(userbuf, count, ppos, buf, pos);
	free_page(addr);
	return res;