blob: 8a0c17e1c2036f03431584a1a48479cd99ecca7e [file] [log] [blame]
Greg Kroah-Hartmanb2441312017-11-01 15:07:57 +01001// SPDX-License-Identifier: GPL-2.0
Joe Perches99824462010-01-26 11:40:00 +00002#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
Linus Torvalds1da177e2005-04-16 15:20:36 -07003
4#ifdef CONFIG_PROC_FS
5#include <linux/errno.h>
6#include <linux/kernel.h>
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +09007#include <linux/string.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07008#include <linux/mm.h>
9#include <linux/module.h>
10#include <linux/proc_fs.h>
11#include <linux/time.h>
12#include <linux/seq_file.h>
Joe Perchesf1e10042010-01-26 11:40:11 +000013#include <linux/uaccess.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070014#include <linux/atmmpc.h>
15#include <linux/atm.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090016#include <linux/gfp.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070017#include "mpc.h"
18#include "mpoa_caches.h"
19
20/*
21 * mpoa_proc.c: Implementation MPOA client's proc
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +090022 * file system statistics
Linus Torvalds1da177e2005-04-16 15:20:36 -070023 */
24
25#if 1
Joe Perchesb50c2ea2010-01-26 11:40:20 +000026#define dprintk(format, args...) \
27 printk(KERN_DEBUG "mpoa:%s: " format, __FILE__, ##args) /* debug */
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#else
Joe Perchesb50c2ea2010-01-26 11:40:20 +000029#define dprintk(format, args...) \
30 do { if (0) \
31 printk(KERN_DEBUG "mpoa:%s: " format, __FILE__, ##args);\
32 } while (0)
33#endif
34
35#if 0
36#define ddprintk(format, args...) \
37 printk(KERN_DEBUG "mpoa:%s: " format, __FILE__, ##args) /* debug */
38#else
39#define ddprintk(format, args...) \
40 do { if (0) \
41 printk(KERN_DEBUG "mpoa:%s: " format, __FILE__, ##args);\
42 } while (0)
Linus Torvalds1da177e2005-04-16 15:20:36 -070043#endif
44
45#define STAT_FILE_NAME "mpc" /* Our statistic file's name */
46
47extern struct mpoa_client *mpcs;
48extern struct proc_dir_entry *atm_proc_root; /* from proc.c. */
49
50static int proc_mpc_open(struct inode *inode, struct file *file);
51static ssize_t proc_mpc_write(struct file *file, const char __user *buff,
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +090052 size_t nbytes, loff_t *ppos);
Linus Torvalds1da177e2005-04-16 15:20:36 -070053
54static int parse_qos(const char *buff);
55
56/*
57 * Define allowed FILE OPERATIONS
58 */
Arjan van de Ven9a321442007-02-12 00:55:35 -080059static const struct file_operations mpc_file_operations = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070060 .owner = THIS_MODULE,
61 .open = proc_mpc_open,
62 .read = seq_read,
63 .llseek = seq_lseek,
64 .write = proc_mpc_write,
65 .release = seq_release,
66};
67
68/*
69 * Returns the state of an ingress cache entry as a string
70 */
Joe Perchesf1e10042010-01-26 11:40:11 +000071static const char *ingress_state_string(int state)
72{
73 switch (state) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070074 case INGRESS_RESOLVING:
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +090075 return "resolving ";
Linus Torvalds1da177e2005-04-16 15:20:36 -070076 case INGRESS_RESOLVED:
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +090077 return "resolved ";
Linus Torvalds1da177e2005-04-16 15:20:36 -070078 case INGRESS_INVALID:
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +090079 return "invalid ";
Linus Torvalds1da177e2005-04-16 15:20:36 -070080 case INGRESS_REFRESHING:
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +090081 return "refreshing ";
Linus Torvalds1da177e2005-04-16 15:20:36 -070082 }
Joe Perchesf1e10042010-01-26 11:40:11 +000083
84 return "";
Linus Torvalds1da177e2005-04-16 15:20:36 -070085}
86
87/*
88 * Returns the state of an egress cache entry as a string
89 */
Joe Perchesf1e10042010-01-26 11:40:11 +000090static const char *egress_state_string(int state)
91{
92 switch (state) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070093 case EGRESS_RESOLVED:
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +090094 return "resolved ";
Linus Torvalds1da177e2005-04-16 15:20:36 -070095 case EGRESS_PURGE:
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +090096 return "purge ";
Linus Torvalds1da177e2005-04-16 15:20:36 -070097 case EGRESS_INVALID:
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +090098 return "invalid ";
Linus Torvalds1da177e2005-04-16 15:20:36 -070099 }
Joe Perchesf1e10042010-01-26 11:40:11 +0000100
101 return "";
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102}
103
104/*
105 * FIXME: mpcs (and per-mpc lists) have no locking whatsoever.
106 */
107
108static void *mpc_start(struct seq_file *m, loff_t *pos)
109{
110 loff_t l = *pos;
111 struct mpoa_client *mpc;
112
113 if (!l--)
114 return SEQ_START_TOKEN;
115 for (mpc = mpcs; mpc; mpc = mpc->next)
116 if (!l--)
117 return mpc;
118 return NULL;
119}
120
121static void *mpc_next(struct seq_file *m, void *v, loff_t *pos)
122{
123 struct mpoa_client *p = v;
124 (*pos)++;
125 return v == SEQ_START_TOKEN ? mpcs : p->next;
126}
127
128static void mpc_stop(struct seq_file *m, void *v)
129{
130}
131
132/*
133 * READING function - called when the /proc/atm/mpoa file is read from.
134 */
135static int mpc_show(struct seq_file *m, void *v)
136{
137 struct mpoa_client *mpc = v;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 int i;
139 in_cache_entry *in_entry;
140 eg_cache_entry *eg_entry;
141 struct timeval now;
142 unsigned char ip_string[16];
143
144 if (v == SEQ_START_TOKEN) {
145 atm_mpoa_disp_qos(m);
146 return 0;
147 }
148
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +0900149 seq_printf(m, "\nInterface %d:\n\n", mpc->dev_num);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150 seq_printf(m, "Ingress Entries:\nIP address State Holding time Packets fwded VPI VCI\n");
151 do_gettimeofday(&now);
152
153 for (in_entry = mpc->in_cache; in_entry; in_entry = in_entry->next) {
Joe Perchesf1e10042010-01-26 11:40:11 +0000154 sprintf(ip_string, "%pI4", &in_entry->ctrl_info.in_dst_ip);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155 seq_printf(m, "%-16s%s%-14lu%-12u",
Joe Perchesf1e10042010-01-26 11:40:11 +0000156 ip_string,
157 ingress_state_string(in_entry->entry_state),
158 in_entry->ctrl_info.holding_time -
159 (now.tv_sec-in_entry->tv.tv_sec),
160 in_entry->packets_fwded);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161 if (in_entry->shortcut)
Joe Perchesf1e10042010-01-26 11:40:11 +0000162 seq_printf(m, " %-3d %-3d",
163 in_entry->shortcut->vpi,
164 in_entry->shortcut->vci);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165 seq_printf(m, "\n");
166 }
167
168 seq_printf(m, "\n");
169 seq_printf(m, "Egress Entries:\nIngress MPC ATM addr\nCache-id State Holding time Packets recvd Latest IP addr VPI VCI\n");
170 for (eg_entry = mpc->eg_cache; eg_entry; eg_entry = eg_entry->next) {
171 unsigned char *p = eg_entry->ctrl_info.in_MPC_data_ATM_addr;
Joe Perchesf1e10042010-01-26 11:40:11 +0000172 for (i = 0; i < ATM_ESA_LEN; i++)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173 seq_printf(m, "%02x", p[i]);
174 seq_printf(m, "\n%-16lu%s%-14lu%-15u",
175 (unsigned long)ntohl(eg_entry->ctrl_info.cache_id),
176 egress_state_string(eg_entry->entry_state),
Joe Perchesf1e10042010-01-26 11:40:11 +0000177 (eg_entry->ctrl_info.holding_time -
178 (now.tv_sec-eg_entry->tv.tv_sec)),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179 eg_entry->packets_rcvd);
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +0900180
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181 /* latest IP address */
Joe Perchesf1e10042010-01-26 11:40:11 +0000182 sprintf(ip_string, "%pI4", &eg_entry->latest_ip_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183 seq_printf(m, "%-16s", ip_string);
184
185 if (eg_entry->shortcut)
Joe Perchesf1e10042010-01-26 11:40:11 +0000186 seq_printf(m, " %-3d %-3d",
187 eg_entry->shortcut->vpi,
188 eg_entry->shortcut->vci);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189 seq_printf(m, "\n");
190 }
191 seq_printf(m, "\n");
192 return 0;
193}
194
Philippe De Muyter56b3d972007-07-10 23:07:31 -0700195static const struct seq_operations mpc_op = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196 .start = mpc_start,
197 .next = mpc_next,
198 .stop = mpc_stop,
199 .show = mpc_show
200};
201
202static int proc_mpc_open(struct inode *inode, struct file *file)
203{
204 return seq_open(file, &mpc_op);
205}
206
207static ssize_t proc_mpc_write(struct file *file, const char __user *buff,
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +0900208 size_t nbytes, loff_t *ppos)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209{
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +0900210 char *page, *p;
Eric Dumazet95c96172012-04-15 05:58:06 +0000211 unsigned int len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +0900213 if (nbytes == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214 return 0;
215
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +0900216 if (nbytes >= PAGE_SIZE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217 nbytes = PAGE_SIZE-1;
218
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +0900219 page = (char *)__get_free_page(GFP_KERNEL);
220 if (!page)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221 return -ENOMEM;
222
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +0900223 for (p = page, len = 0; len < nbytes; p++, len++) {
224 if (get_user(*p, buff++)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225 free_page((unsigned long)page);
226 return -EFAULT;
227 }
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +0900228 if (*p == '\0' || *p == '\n')
229 break;
230 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +0900232 *p = '\0';
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233
234 if (!parse_qos(page))
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +0900235 printk("mpoa: proc_mpc_write: could not parse '%s'\n", page);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +0900237 free_page((unsigned long)page);
238
239 return len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240}
241
242static int parse_qos(const char *buff)
243{
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +0900244 /* possible lines look like this
245 * add 130.230.54.142 tx=max_pcr,max_sdu rx=max_pcr,max_sdu
246 */
247 unsigned char ip[4];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248 int tx_pcr, tx_sdu, rx_pcr, rx_sdu;
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +0900249 __be32 ipaddr;
250 struct atm_qos qos;
251
252 memset(&qos, 0, sizeof(struct atm_qos));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253
254 if (sscanf(buff, "del %hhu.%hhu.%hhu.%hhu",
255 ip, ip+1, ip+2, ip+3) == 4) {
Al Viro30d492d2006-11-14 21:11:29 -0800256 ipaddr = *(__be32 *)ip;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257 return atm_mpoa_delete_qos(atm_mpoa_search_qos(ipaddr));
258 }
259
260 if (sscanf(buff, "add %hhu.%hhu.%hhu.%hhu tx=%d,%d rx=tx",
261 ip, ip+1, ip+2, ip+3, &tx_pcr, &tx_sdu) == 6) {
262 rx_pcr = tx_pcr;
263 rx_sdu = tx_sdu;
264 } else if (sscanf(buff, "add %hhu.%hhu.%hhu.%hhu tx=%d,%d rx=%d,%d",
265 ip, ip+1, ip+2, ip+3, &tx_pcr, &tx_sdu, &rx_pcr, &rx_sdu) != 8)
266 return 0;
267
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +0900268 ipaddr = *(__be32 *)ip;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269 qos.txtp.traffic_class = ATM_CBR;
270 qos.txtp.max_pcr = tx_pcr;
271 qos.txtp.max_sdu = tx_sdu;
272 qos.rxtp.traffic_class = ATM_CBR;
273 qos.rxtp.max_pcr = rx_pcr;
274 qos.rxtp.max_sdu = rx_sdu;
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +0900275 qos.aal = ATM_AAL5;
Masanari Iidaf42cf8d2015-02-24 23:11:26 +0900276 dprintk("parse_qos(): setting qos parameters to tx=%d,%d rx=%d,%d\n",
Joe Perchesb50c2ea2010-01-26 11:40:20 +0000277 qos.txtp.max_pcr, qos.txtp.max_sdu,
278 qos.rxtp.max_pcr, qos.rxtp.max_sdu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279
280 atm_mpoa_add_qos(ipaddr, &qos);
281 return 1;
282}
283
284/*
285 * INITIALIZATION function - called when module is initialized/loaded.
286 */
287int mpc_proc_init(void)
288{
289 struct proc_dir_entry *p;
290
Wang Chen16e297b2008-02-28 13:55:45 -0800291 p = proc_create(STAT_FILE_NAME, 0, atm_proc_root, &mpc_file_operations);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292 if (!p) {
Joe Perches99824462010-01-26 11:40:00 +0000293 pr_err("Unable to initialize /proc/atm/%s\n", STAT_FILE_NAME);
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +0900294 return -ENOMEM;
295 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296 return 0;
297}
298
299/*
300 * DELETING function - called when module is removed.
301 */
302void mpc_proc_clean(void)
303{
Joe Perchesf1e10042010-01-26 11:40:11 +0000304 remove_proc_entry(STAT_FILE_NAME, atm_proc_root);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305}
306
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307#endif /* CONFIG_PROC_FS */
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