[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / atm / mpoa_proc.c

#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__

#ifdef CONFIG_PROC_FS
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/proc_fs.h>
#include <linux/time.h>
#include <linux/seq_file.h>
#include <linux/uaccess.h>
#include <linux/atmmpc.h>
#include <linux/atm.h>
#include "mpc.h"
#include "mpoa_caches.h"

/*
 * mpoa_proc.c: Implementation MPOA client's proc
 * file system statistics
 */

#if 1
#define dprintk(format, args...)					\
	printk(KERN_DEBUG "mpoa:%s: " format, __FILE__, ##args)  /* debug */
#else
#define dprintk(format, args...)					\
	do { if (0)							\
		printk(KERN_DEBUG "mpoa:%s: " format, __FILE__, ##args);\
	} while (0)
#endif

#if 0
#define ddprintk(format, args...)					\
	printk(KERN_DEBUG "mpoa:%s: " format, __FILE__, ##args)  /* debug */
#else
#define ddprintk(format, args...)					\
	do { if (0)							\
		printk(KERN_DEBUG "mpoa:%s: " format, __FILE__, ##args);\
	} while (0)
#endif

#define STAT_FILE_NAME "mpc"     /* Our statistic file's name */

extern struct mpoa_client *mpcs;
extern struct proc_dir_entry *atm_proc_root;  /* from proc.c. */

static int proc_mpc_open(struct inode *inode, struct file *file);
static ssize_t proc_mpc_write(struct file *file, const char __user *buff,
			      size_t nbytes, loff_t *ppos);

static int parse_qos(const char *buff);

/*
 *   Define allowed FILE OPERATIONS
 */
static const struct file_operations mpc_file_operations = {
	.owner =	THIS_MODULE,
	.open =		proc_mpc_open,
	.read =		seq_read,
	.llseek =	seq_lseek,
	.write =	proc_mpc_write,
	.release =	seq_release,
};

/*
 * Returns the state of an ingress cache entry as a string
 */
static const char *ingress_state_string(int state)
{
	switch (state) {
	case INGRESS_RESOLVING:
		return "resolving  ";
	case INGRESS_RESOLVED:
		return "resolved   ";
	case INGRESS_INVALID:
		return "invalid    ";
	case INGRESS_REFRESHING:
		return "refreshing ";
	}

	return "";
}

/*
 * Returns the state of an egress cache entry as a string
 */
static const char *egress_state_string(int state)
{
	switch (state) {
	case EGRESS_RESOLVED:
		return "resolved   ";
	case EGRESS_PURGE:
		return "purge      ";
	case EGRESS_INVALID:
		return "invalid    ";
	}

	return "";
}

/*
 * FIXME: mpcs (and per-mpc lists) have no locking whatsoever.
 */

static void *mpc_start(struct seq_file *m, loff_t *pos)
{
	loff_t l = *pos;
	struct mpoa_client *mpc;

	if (!l--)
		return SEQ_START_TOKEN;
	for (mpc = mpcs; mpc; mpc = mpc->next)
		if (!l--)
			return mpc;
	return NULL;
}

static void *mpc_next(struct seq_file *m, void *v, loff_t *pos)
{
	struct mpoa_client *p = v;
	(*pos)++;
	return v == SEQ_START_TOKEN ? mpcs : p->next;
}

static void mpc_stop(struct seq_file *m, void *v)
{
}

/*
 * READING function - called when the /proc/atm/mpoa file is read from.
 */
static int mpc_show(struct seq_file *m, void *v)
{
	struct mpoa_client *mpc = v;
	int i;
	in_cache_entry *in_entry;
	eg_cache_entry *eg_entry;
	struct timeval now;
	unsigned char ip_string[16];

	if (v == SEQ_START_TOKEN) {
		atm_mpoa_disp_qos(m);
		return 0;
	}

	seq_printf(m, "\nInterface %d:\n\n", mpc->dev_num);
	seq_printf(m, "Ingress Entries:\nIP address      State      Holding time  Packets fwded  VPI  VCI\n");
	do_gettimeofday(&now);

	for (in_entry = mpc->in_cache; in_entry; in_entry = in_entry->next) {
		sprintf(ip_string, "%pI4", &in_entry->ctrl_info.in_dst_ip);
		seq_printf(m, "%-16s%s%-14lu%-12u",
			   ip_string,
			   ingress_state_string(in_entry->entry_state),
			   in_entry->ctrl_info.holding_time -
			   (now.tv_sec-in_entry->tv.tv_sec),
			   in_entry->packets_fwded);
		if (in_entry->shortcut)
			seq_printf(m, "   %-3d  %-3d",
				   in_entry->shortcut->vpi,
				   in_entry->shortcut->vci);
		seq_printf(m, "\n");
	}

	seq_printf(m, "\n");
	seq_printf(m, "Egress Entries:\nIngress MPC ATM addr\nCache-id        State      Holding time  Packets recvd  Latest IP addr   VPI VCI\n");
	for (eg_entry = mpc->eg_cache; eg_entry; eg_entry = eg_entry->next) {
		unsigned char *p = eg_entry->ctrl_info.in_MPC_data_ATM_addr;
		for (i = 0; i < ATM_ESA_LEN; i++)
			seq_printf(m, "%02x", p[i]);
		seq_printf(m, "\n%-16lu%s%-14lu%-15u",
			   (unsigned long)ntohl(eg_entry->ctrl_info.cache_id),
			   egress_state_string(eg_entry->entry_state),
			   (eg_entry->ctrl_info.holding_time -
			    (now.tv_sec-eg_entry->tv.tv_sec)),
			   eg_entry->packets_rcvd);

		/* latest IP address */
		sprintf(ip_string, "%pI4", &eg_entry->latest_ip_addr);
		seq_printf(m, "%-16s", ip_string);

		if (eg_entry->shortcut)
			seq_printf(m, " %-3d %-3d",
				   eg_entry->shortcut->vpi,
				   eg_entry->shortcut->vci);
		seq_printf(m, "\n");
	}
	seq_printf(m, "\n");
	return 0;
}

static const struct seq_operations mpc_op = {
	.start =	mpc_start,
	.next =		mpc_next,
	.stop =		mpc_stop,
	.show =		mpc_show
};

static int proc_mpc_open(struct inode *inode, struct file *file)
{
	return seq_open(file, &mpc_op);
}

static ssize_t proc_mpc_write(struct file *file, const char __user *buff,
			      size_t nbytes, loff_t *ppos)
{
	char *page, *p;
	unsigned len;

	if (nbytes == 0)
		return 0;

	if (nbytes >= PAGE_SIZE)
		nbytes = PAGE_SIZE-1;

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

	for (p = page, len = 0; len < nbytes; p++, len++) {
		if (get_user(*p, buff++)) {
			free_page((unsigned long)page);
			return -EFAULT;
		}
		if (*p == '\0' || *p == '\n')
			break;
	}

	*p = '\0';

	if (!parse_qos(page))
		printk("mpoa: proc_mpc_write: could not parse '%s'\n", page);

	free_page((unsigned long)page);

	return len;
}

static int parse_qos(const char *buff)
{
	/* possible lines look like this
	 * add 130.230.54.142 tx=max_pcr,max_sdu rx=max_pcr,max_sdu
	 */
	unsigned char ip[4];
	int tx_pcr, tx_sdu, rx_pcr, rx_sdu;
	__be32 ipaddr;
	struct atm_qos qos;

	memset(&qos, 0, sizeof(struct atm_qos));

	if (sscanf(buff, "del %hhu.%hhu.%hhu.%hhu",
			ip, ip+1, ip+2, ip+3) == 4) {
		ipaddr = *(__be32 *)ip;
		return atm_mpoa_delete_qos(atm_mpoa_search_qos(ipaddr));
	}

	if (sscanf(buff, "add %hhu.%hhu.%hhu.%hhu tx=%d,%d rx=tx",
			ip, ip+1, ip+2, ip+3, &tx_pcr, &tx_sdu) == 6) {
		rx_pcr = tx_pcr;
		rx_sdu = tx_sdu;
	} else if (sscanf(buff, "add %hhu.%hhu.%hhu.%hhu tx=%d,%d rx=%d,%d",
		ip, ip+1, ip+2, ip+3, &tx_pcr, &tx_sdu, &rx_pcr, &rx_sdu) != 8)
		return 0;

	ipaddr = *(__be32 *)ip;
	qos.txtp.traffic_class = ATM_CBR;
	qos.txtp.max_pcr = tx_pcr;
	qos.txtp.max_sdu = tx_sdu;
	qos.rxtp.traffic_class = ATM_CBR;
	qos.rxtp.max_pcr = rx_pcr;
	qos.rxtp.max_sdu = rx_sdu;
	qos.aal = ATM_AAL5;
	dprintk("parse_qos(): setting qos paramameters to tx=%d,%d rx=%d,%d\n",
		qos.txtp.max_pcr, qos.txtp.max_sdu,
		qos.rxtp.max_pcr, qos.rxtp.max_sdu);

	atm_mpoa_add_qos(ipaddr, &qos);
	return 1;
}

/*
 * INITIALIZATION function - called when module is initialized/loaded.
 */
int mpc_proc_init(void)
{
	struct proc_dir_entry *p;

	p = proc_create(STAT_FILE_NAME, 0, atm_proc_root, &mpc_file_operations);
	if (!p) {
		pr_err("Unable to initialize /proc/atm/%s\n", STAT_FILE_NAME);
		return -ENOMEM;
	}
	return 0;
}

/*
 * DELETING function - called when module is removed.
 */
void mpc_proc_clean(void)
{
	remove_proc_entry(STAT_FILE_NAME, atm_proc_root);
}

#endif /* CONFIG_PROC_FS */
Commit	Line	Data
99824461	1	#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
1da177e4 LT	2
	3	#ifdef CONFIG_PROC_FS
	4	#include <linux/errno.h>
	5	#include <linux/kernel.h>
f7d57453	6	#include <linux/string.h>
1da177e4 LT	7	#include <linux/mm.h>
	8	#include <linux/module.h>
	9	#include <linux/proc_fs.h>
	10	#include <linux/time.h>
	11	#include <linux/seq_file.h>
f1e10049	12	#include <linux/uaccess.h>
1da177e4 LT	13	#include <linux/atmmpc.h>
	14	#include <linux/atm.h>
	15	#include "mpc.h"
	16	#include "mpoa_caches.h"
	17
	18	/*
	19	* mpoa_proc.c: Implementation MPOA client's proc
f7d57453	20	* file system statistics
1da177e4 LT	21	*/
	22
	23	#if 1
b50c2ea7 JP	24	#define dprintk(format, args...) \
b50c2ea7 JP	25	printk(KERN_DEBUG "mpoa:%s: " format, __FILE__, ##args) /* debug */
1da177e4	26	#else
b50c2ea7 JP	27	#define dprintk(format, args...) \
	28	do { if (0) \
	29	printk(KERN_DEBUG "mpoa:%s: " format, __FILE__, ##args);\
	30	} while (0)
	31	#endif
	32
	33	#if 0
	34	#define ddprintk(format, args...) \
	35	printk(KERN_DEBUG "mpoa:%s: " format, __FILE__, ##args) /* debug */
	36	#else
	37	#define ddprintk(format, args...) \
	38	do { if (0) \
	39	printk(KERN_DEBUG "mpoa:%s: " format, __FILE__, ##args);\
	40	} while (0)
1da177e4 LT	41	#endif
	42
	43	#define STAT_FILE_NAME "mpc" /* Our statistic file's name */
	44
	45	extern struct mpoa_client *mpcs;
	46	extern struct proc_dir_entry atm_proc_root; / from proc.c. */
	47
	48	static int proc_mpc_open(struct inode inode, struct file file);
	49	static ssize_t proc_mpc_write(struct file file, const char __user buff,
f7d57453	50	size_t nbytes, loff_t *ppos);
1da177e4 LT	51
	52	static int parse_qos(const char *buff);
	53
	54	/*
	55	* Define allowed FILE OPERATIONS
	56	*/
9a32144e	57	static const struct file_operations mpc_file_operations = {
1da177e4 LT	58	.owner = THIS_MODULE,
	59	.open = proc_mpc_open,
	60	.read = seq_read,
	61	.llseek = seq_lseek,
	62	.write = proc_mpc_write,
	63	.release = seq_release,
	64	};
	65
	66	/*
	67	* Returns the state of an ingress cache entry as a string
	68	*/
f1e10049 JP	69	static const char *ingress_state_string(int state)
	70	{
	71	switch (state) {
1da177e4	72	case INGRESS_RESOLVING:
f7d57453	73	return "resolving ";
1da177e4	74	case INGRESS_RESOLVED:
f7d57453	75	return "resolved ";
1da177e4	76	case INGRESS_INVALID:
f7d57453	77	return "invalid ";
1da177e4	78	case INGRESS_REFRESHING:
f7d57453	79	return "refreshing ";
1da177e4	80	}
f1e10049 JP	81
f1e10049 JP	82	return "";
1da177e4 LT	83	}
	84
	85	/*
	86	* Returns the state of an egress cache entry as a string
	87	*/
f1e10049 JP	88	static const char *egress_state_string(int state)
	89	{
	90	switch (state) {
1da177e4	91	case EGRESS_RESOLVED:
f7d57453	92	return "resolved ";
1da177e4	93	case EGRESS_PURGE:
f7d57453	94	return "purge ";
1da177e4	95	case EGRESS_INVALID:
f7d57453	96	return "invalid ";
1da177e4	97	}
f1e10049 JP	98
f1e10049 JP	99	return "";
1da177e4 LT	100	}
	101
	102	/*
	103	* FIXME: mpcs (and per-mpc lists) have no locking whatsoever.
	104	*/
	105
	106	static void mpc_start(struct seq_file m, loff_t *pos)
	107	{
	108	loff_t l = *pos;
	109	struct mpoa_client *mpc;
	110
	111	if (!l--)
	112	return SEQ_START_TOKEN;
	113	for (mpc = mpcs; mpc; mpc = mpc->next)
	114	if (!l--)
	115	return mpc;
	116	return NULL;
	117	}
	118
	119	static void mpc_next(struct seq_file m, void v, loff_t pos)
	120	{
	121	struct mpoa_client *p = v;
	122	(*pos)++;
	123	return v == SEQ_START_TOKEN ? mpcs : p->next;
	124	}
	125
	126	static void mpc_stop(struct seq_file m, void v)
	127	{
	128	}
	129
	130	/*
	131	* READING function - called when the /proc/atm/mpoa file is read from.
	132	*/
	133	static int mpc_show(struct seq_file m, void v)
	134	{
	135	struct mpoa_client *mpc = v;
1da177e4 LT	136	int i;
	137	in_cache_entry *in_entry;
	138	eg_cache_entry *eg_entry;
	139	struct timeval now;
	140	unsigned char ip_string[16];
	141
	142	if (v == SEQ_START_TOKEN) {
	143	atm_mpoa_disp_qos(m);
	144	return 0;
	145	}
	146
f7d57453	147	seq_printf(m, "\nInterface %d:\n\n", mpc->dev_num);
1da177e4 LT	148	seq_printf(m, "Ingress Entries:\nIP address State Holding time Packets fwded VPI VCI\n");
	149	do_gettimeofday(&now);
	150
	151	for (in_entry = mpc->in_cache; in_entry; in_entry = in_entry->next) {
f1e10049	152	sprintf(ip_string, "%pI4", &in_entry->ctrl_info.in_dst_ip);
1da177e4	153	seq_printf(m, "%-16s%s%-14lu%-12u",
f1e10049 JP	154	ip_string,
	155	ingress_state_string(in_entry->entry_state),
	156	in_entry->ctrl_info.holding_time -
	157	(now.tv_sec-in_entry->tv.tv_sec),
	158	in_entry->packets_fwded);
1da177e4	159	if (in_entry->shortcut)
f1e10049 JP	160	seq_printf(m, " %-3d %-3d",
	161	in_entry->shortcut->vpi,
	162	in_entry->shortcut->vci);
1da177e4 LT	163	seq_printf(m, "\n");
	164	}
	165
	166	seq_printf(m, "\n");
	167	seq_printf(m, "Egress Entries:\nIngress MPC ATM addr\nCache-id State Holding time Packets recvd Latest IP addr VPI VCI\n");
	168	for (eg_entry = mpc->eg_cache; eg_entry; eg_entry = eg_entry->next) {
	169	unsigned char *p = eg_entry->ctrl_info.in_MPC_data_ATM_addr;
f1e10049	170	for (i = 0; i < ATM_ESA_LEN; i++)
1da177e4 LT	171	seq_printf(m, "%02x", p[i]);
	172	seq_printf(m, "\n%-16lu%s%-14lu%-15u",
	173	(unsigned long)ntohl(eg_entry->ctrl_info.cache_id),
	174	egress_state_string(eg_entry->entry_state),
f1e10049 JP	175	(eg_entry->ctrl_info.holding_time -
f1e10049 JP	176	(now.tv_sec-eg_entry->tv.tv_sec)),
1da177e4	177	eg_entry->packets_rcvd);
f7d57453	178
1da177e4	179	/* latest IP address */
f1e10049	180	sprintf(ip_string, "%pI4", &eg_entry->latest_ip_addr);
1da177e4 LT	181	seq_printf(m, "%-16s", ip_string);
	182
	183	if (eg_entry->shortcut)
f1e10049 JP	184	seq_printf(m, " %-3d %-3d",
	185	eg_entry->shortcut->vpi,
	186	eg_entry->shortcut->vci);
1da177e4 LT	187	seq_printf(m, "\n");
	188	}
	189	seq_printf(m, "\n");
	190	return 0;
	191	}
	192
56b3d975	193	static const struct seq_operations mpc_op = {
1da177e4 LT	194	.start = mpc_start,
	195	.next = mpc_next,
	196	.stop = mpc_stop,
	197	.show = mpc_show
	198	};
	199
	200	static int proc_mpc_open(struct inode inode, struct file file)
	201	{
	202	return seq_open(file, &mpc_op);
	203	}
	204
	205	static ssize_t proc_mpc_write(struct file file, const char __user buff,
f7d57453	206	size_t nbytes, loff_t *ppos)
1da177e4	207	{
f7d57453	208	char page, p;
1da177e4 LT	209	unsigned len;
1da177e4 LT	210
f7d57453	211	if (nbytes == 0)
1da177e4 LT	212	return 0;
1da177e4 LT	213
f7d57453	214	if (nbytes >= PAGE_SIZE)
1da177e4 LT	215	nbytes = PAGE_SIZE-1;
1da177e4 LT	216
f7d57453 YH	217	page = (char *)__get_free_page(GFP_KERNEL);
f7d57453 YH	218	if (!page)
1da177e4 LT	219	return -ENOMEM;
1da177e4 LT	220
f7d57453 YH	221	for (p = page, len = 0; len < nbytes; p++, len++) {
f7d57453 YH	222	if (get_user(*p, buff++)) {
1da177e4 LT	223	free_page((unsigned long)page);
	224	return -EFAULT;
	225	}
f7d57453 YH	226	if (p == '\0' \|\| p == '\n')
	227	break;
	228	}
1da177e4	229
f7d57453	230	*p = '\0';
1da177e4 LT	231
1da177e4 LT	232	if (!parse_qos(page))
f7d57453 YH	233	printk("mpoa: proc_mpc_write: could not parse '%s'\n", page);
	234
	235	free_page((unsigned long)page);
1da177e4	236
f7d57453	237	return len;
1da177e4 LT	238	}
	239
	240	static int parse_qos(const char *buff)
	241	{
f7d57453 YH	242	/* possible lines look like this
	243	* add 130.230.54.142 tx=max_pcr,max_sdu rx=max_pcr,max_sdu
	244	*/
	245	unsigned char ip[4];
1da177e4	246	int tx_pcr, tx_sdu, rx_pcr, rx_sdu;
f7d57453 YH	247	__be32 ipaddr;
	248	struct atm_qos qos;
	249
	250	memset(&qos, 0, sizeof(struct atm_qos));
1da177e4 LT	251
	252	if (sscanf(buff, "del %hhu.%hhu.%hhu.%hhu",
	253	ip, ip+1, ip+2, ip+3) == 4) {
30d492da	254	ipaddr = (__be32 )ip;
1da177e4 LT	255	return atm_mpoa_delete_qos(atm_mpoa_search_qos(ipaddr));
	256	}
	257
	258	if (sscanf(buff, "add %hhu.%hhu.%hhu.%hhu tx=%d,%d rx=tx",
	259	ip, ip+1, ip+2, ip+3, &tx_pcr, &tx_sdu) == 6) {
	260	rx_pcr = tx_pcr;
	261	rx_sdu = tx_sdu;
	262	} else if (sscanf(buff, "add %hhu.%hhu.%hhu.%hhu tx=%d,%d rx=%d,%d",
	263	ip, ip+1, ip+2, ip+3, &tx_pcr, &tx_sdu, &rx_pcr, &rx_sdu) != 8)
	264	return 0;
	265
f7d57453	266	ipaddr = (__be32 )ip;
1da177e4 LT	267	qos.txtp.traffic_class = ATM_CBR;
	268	qos.txtp.max_pcr = tx_pcr;
	269	qos.txtp.max_sdu = tx_sdu;
	270	qos.rxtp.traffic_class = ATM_CBR;
	271	qos.rxtp.max_pcr = rx_pcr;
	272	qos.rxtp.max_sdu = rx_sdu;
f7d57453	273	qos.aal = ATM_AAL5;
b50c2ea7 JP	274	dprintk("parse_qos(): setting qos paramameters to tx=%d,%d rx=%d,%d\n",
	275	qos.txtp.max_pcr, qos.txtp.max_sdu,
	276	qos.rxtp.max_pcr, qos.rxtp.max_sdu);
1da177e4 LT	277
	278	atm_mpoa_add_qos(ipaddr, &qos);
	279	return 1;
	280	}
	281
	282	/*
	283	* INITIALIZATION function - called when module is initialized/loaded.
	284	*/
	285	int mpc_proc_init(void)
	286	{
	287	struct proc_dir_entry *p;
	288
16e297b3	289	p = proc_create(STAT_FILE_NAME, 0, atm_proc_root, &mpc_file_operations);
1da177e4	290	if (!p) {
99824461	291	pr_err("Unable to initialize /proc/atm/%s\n", STAT_FILE_NAME);
f7d57453 YH	292	return -ENOMEM;
f7d57453 YH	293	}
1da177e4 LT	294	return 0;
	295	}
	296
	297	/*
	298	* DELETING function - called when module is removed.
	299	*/
	300	void mpc_proc_clean(void)
	301	{
f1e10049	302	remove_proc_entry(STAT_FILE_NAME, atm_proc_root);
1da177e4 LT	303	}
1da177e4 LT	304
1da177e4 LT	305	#endif /* CONFIG_PROC_FS */
	306
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