1
2#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
3
4#ifdef CONFIG_PROC_FS
5#include <linux/errno.h>
6#include <linux/kernel.h>
7#include <linux/string.h>
8#include <linux/mm.h>
9#include <linux/module.h>
10#include <linux/proc_fs.h>
11#include <linux/ktime.h>
12#include <linux/seq_file.h>
13#include <linux/uaccess.h>
14#include <linux/atmmpc.h>
15#include <linux/atm.h>
16#include <linux/gfp.h>
17#include "mpc.h"
18#include "mpoa_caches.h"
19
20
21
22
23
24
25#if 1
26#define dprintk(format, args...) \
27 printk(KERN_DEBUG "mpoa:%s: " format, __FILE__, ##args)
28#else
29#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)
38#else
39#define ddprintk(format, args...) \
40 do { if (0) \
41 printk(KERN_DEBUG "mpoa:%s: " format, __FILE__, ##args);\
42 } while (0)
43#endif
44
45#define STAT_FILE_NAME "mpc"
46
47extern struct mpoa_client *mpcs;
48extern struct proc_dir_entry *atm_proc_root;
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,
52 size_t nbytes, loff_t *ppos);
53
54static int parse_qos(const char *buff);
55
56static const struct proc_ops mpc_proc_ops = {
57 .proc_open = proc_mpc_open,
58 .proc_read = seq_read,
59 .proc_lseek = seq_lseek,
60 .proc_write = proc_mpc_write,
61 .proc_release = seq_release,
62};
63
64
65
66
67static const char *ingress_state_string(int state)
68{
69 switch (state) {
70 case INGRESS_RESOLVING:
71 return "resolving ";
72 case INGRESS_RESOLVED:
73 return "resolved ";
74 case INGRESS_INVALID:
75 return "invalid ";
76 case INGRESS_REFRESHING:
77 return "refreshing ";
78 }
79
80 return "";
81}
82
83
84
85
86static const char *egress_state_string(int state)
87{
88 switch (state) {
89 case EGRESS_RESOLVED:
90 return "resolved ";
91 case EGRESS_PURGE:
92 return "purge ";
93 case EGRESS_INVALID:
94 return "invalid ";
95 }
96
97 return "";
98}
99
100
101
102
103
104static void *mpc_start(struct seq_file *m, loff_t *pos)
105{
106 loff_t l = *pos;
107 struct mpoa_client *mpc;
108
109 if (!l--)
110 return SEQ_START_TOKEN;
111 for (mpc = mpcs; mpc; mpc = mpc->next)
112 if (!l--)
113 return mpc;
114 return NULL;
115}
116
117static void *mpc_next(struct seq_file *m, void *v, loff_t *pos)
118{
119 struct mpoa_client *p = v;
120 (*pos)++;
121 return v == SEQ_START_TOKEN ? mpcs : p->next;
122}
123
124static void mpc_stop(struct seq_file *m, void *v)
125{
126}
127
128
129
130
131static int mpc_show(struct seq_file *m, void *v)
132{
133 struct mpoa_client *mpc = v;
134 int i;
135 in_cache_entry *in_entry;
136 eg_cache_entry *eg_entry;
137 time64_t now;
138 unsigned char ip_string[16];
139
140 if (v == SEQ_START_TOKEN) {
141 atm_mpoa_disp_qos(m);
142 return 0;
143 }
144
145 seq_printf(m, "\nInterface %d:\n\n", mpc->dev_num);
146 seq_printf(m, "Ingress Entries:\nIP address State Holding time Packets fwded VPI VCI\n");
147 now = ktime_get_seconds();
148
149 for (in_entry = mpc->in_cache; in_entry; in_entry = in_entry->next) {
150 unsigned long seconds_delta = now - in_entry->time;
151
152 sprintf(ip_string, "%pI4", &in_entry->ctrl_info.in_dst_ip);
153 seq_printf(m, "%-16s%s%-14lu%-12u",
154 ip_string,
155 ingress_state_string(in_entry->entry_state),
156 in_entry->ctrl_info.holding_time -
157 seconds_delta,
158 in_entry->packets_fwded);
159 if (in_entry->shortcut)
160 seq_printf(m, " %-3d %-3d",
161 in_entry->shortcut->vpi,
162 in_entry->shortcut->vci);
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;
170 unsigned long seconds_delta = now - eg_entry->time;
171
172 for (i = 0; i < ATM_ESA_LEN; i++)
173 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),
177 (eg_entry->ctrl_info.holding_time - seconds_delta),
178 eg_entry->packets_rcvd);
179
180
181 sprintf(ip_string, "%pI4", &eg_entry->latest_ip_addr);
182 seq_printf(m, "%-16s", ip_string);
183
184 if (eg_entry->shortcut)
185 seq_printf(m, " %-3d %-3d",
186 eg_entry->shortcut->vpi,
187 eg_entry->shortcut->vci);
188 seq_printf(m, "\n");
189 }
190 seq_printf(m, "\n");
191 return 0;
192}
193
194static const struct seq_operations mpc_op = {
195 .start = mpc_start,
196 .next = mpc_next,
197 .stop = mpc_stop,
198 .show = mpc_show
199};
200
201static int proc_mpc_open(struct inode *inode, struct file *file)
202{
203 return seq_open(file, &mpc_op);
204}
205
206static ssize_t proc_mpc_write(struct file *file, const char __user *buff,
207 size_t nbytes, loff_t *ppos)
208{
209 char *page, *p;
210 unsigned int len;
211
212 if (nbytes == 0)
213 return 0;
214
215 if (nbytes >= PAGE_SIZE)
216 nbytes = PAGE_SIZE-1;
217
218 page = (char *)__get_free_page(GFP_KERNEL);
219 if (!page)
220 return -ENOMEM;
221
222 for (p = page, len = 0; len < nbytes; p++, len++) {
223 if (get_user(*p, buff++)) {
224 free_page((unsigned long)page);
225 return -EFAULT;
226 }
227 if (*p == '\0' || *p == '\n')
228 break;
229 }
230
231 *p = '\0';
232
233 if (!parse_qos(page))
234 printk("mpoa: proc_mpc_write: could not parse '%s'\n", page);
235
236 free_page((unsigned long)page);
237
238 return len;
239}
240
241static int parse_qos(const char *buff)
242{
243
244
245
246 unsigned char ip[4];
247 int tx_pcr, tx_sdu, rx_pcr, rx_sdu;
248 __be32 ipaddr;
249 struct atm_qos qos;
250
251 memset(&qos, 0, sizeof(struct atm_qos));
252
253 if (sscanf(buff, "del %hhu.%hhu.%hhu.%hhu",
254 ip, ip+1, ip+2, ip+3) == 4) {
255 ipaddr = *(__be32 *)ip;
256 return atm_mpoa_delete_qos(atm_mpoa_search_qos(ipaddr));
257 }
258
259 if (sscanf(buff, "add %hhu.%hhu.%hhu.%hhu tx=%d,%d rx=tx",
260 ip, ip+1, ip+2, ip+3, &tx_pcr, &tx_sdu) == 6) {
261 rx_pcr = tx_pcr;
262 rx_sdu = tx_sdu;
263 } else if (sscanf(buff, "add %hhu.%hhu.%hhu.%hhu tx=%d,%d rx=%d,%d",
264 ip, ip+1, ip+2, ip+3, &tx_pcr, &tx_sdu, &rx_pcr, &rx_sdu) != 8)
265 return 0;
266
267 ipaddr = *(__be32 *)ip;
268 qos.txtp.traffic_class = ATM_CBR;
269 qos.txtp.max_pcr = tx_pcr;
270 qos.txtp.max_sdu = tx_sdu;
271 qos.rxtp.traffic_class = ATM_CBR;
272 qos.rxtp.max_pcr = rx_pcr;
273 qos.rxtp.max_sdu = rx_sdu;
274 qos.aal = ATM_AAL5;
275 dprintk("parse_qos(): setting qos parameters to tx=%d,%d rx=%d,%d\n",
276 qos.txtp.max_pcr, qos.txtp.max_sdu,
277 qos.rxtp.max_pcr, qos.rxtp.max_sdu);
278
279 atm_mpoa_add_qos(ipaddr, &qos);
280 return 1;
281}
282
283
284
285
286int mpc_proc_init(void)
287{
288 struct proc_dir_entry *p;
289
290 p = proc_create(STAT_FILE_NAME, 0, atm_proc_root, &mpc_proc_ops);
291 if (!p) {
292 pr_err("Unable to initialize /proc/atm/%s\n", STAT_FILE_NAME);
293 return -ENOMEM;
294 }
295 return 0;
296}
297
298
299
300
301void mpc_proc_clean(void)
302{
303 remove_proc_entry(STAT_FILE_NAME, atm_proc_root);
304}
305
306#endif
307
