1 #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
4 #include <linux/errno.h>
5 #include <linux/kernel.h>
6 #include <linux/string.h>
8 #include <linux/module.h>
9 #include <linux/proc_fs.h>
10 #include <linux/time.h>
11 #include <linux/seq_file.h>
12 #include <linux/uaccess.h>
13 #include <linux/atmmpc.h>
14 #include <linux/atm.h>
16 #include "mpoa_caches.h"
19 * mpoa_proc.c: Implementation MPOA client's proc
20 * file system statistics
24 #define dprintk(format, args...) \
25 printk(KERN_DEBUG "mpoa:%s: " format, __FILE__, ##args) /* debug */
27 #define dprintk(format, args...) \
29 printk(KERN_DEBUG "mpoa:%s: " format, __FILE__, ##args);\
34 #define ddprintk(format, args...) \
35 printk(KERN_DEBUG "mpoa:%s: " format, __FILE__, ##args) /* debug */
37 #define ddprintk(format, args...) \
39 printk(KERN_DEBUG "mpoa:%s: " format, __FILE__, ##args);\
43 #define STAT_FILE_NAME "mpc" /* Our statistic file's name */
45 extern struct mpoa_client *mpcs;
46 extern struct proc_dir_entry *atm_proc_root; /* from proc.c. */
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,
50 size_t nbytes, loff_t *ppos);
52 static int parse_qos(const char *buff);
55 * Define allowed FILE OPERATIONS
57 static const struct file_operations mpc_file_operations = {
59 .open = proc_mpc_open,
62 .write = proc_mpc_write,
63 .release = seq_release,
67 * Returns the state of an ingress cache entry as a string
69 static const char *ingress_state_string(int state)
72 case INGRESS_RESOLVING:
74 case INGRESS_RESOLVED:
78 case INGRESS_REFRESHING:
86 * Returns the state of an egress cache entry as a string
88 static const char *egress_state_string(int state)
103 * FIXME: mpcs (and per-mpc lists) have no locking whatsoever.
106 static void *mpc_start(struct seq_file *m, loff_t *pos)
109 struct mpoa_client *mpc;
112 return SEQ_START_TOKEN;
113 for (mpc = mpcs; mpc; mpc = mpc->next)
119 static void *mpc_next(struct seq_file *m, void *v, loff_t *pos)
121 struct mpoa_client *p = v;
123 return v == SEQ_START_TOKEN ? mpcs : p->next;
126 static void mpc_stop(struct seq_file *m, void *v)
131 * READING function - called when the /proc/atm/mpoa file is read from.
133 static int mpc_show(struct seq_file *m, void *v)
135 struct mpoa_client *mpc = v;
137 in_cache_entry *in_entry;
138 eg_cache_entry *eg_entry;
140 unsigned char ip_string[16];
142 if (v == SEQ_START_TOKEN) {
143 atm_mpoa_disp_qos(m);
147 seq_printf(m, "\nInterface %d:\n\n", mpc->dev_num);
148 seq_printf(m, "Ingress Entries:\nIP address State Holding time Packets fwded VPI VCI\n");
149 do_gettimeofday(&now);
151 for (in_entry = mpc->in_cache; in_entry; in_entry = in_entry->next) {
152 sprintf(ip_string, "%pI4", &in_entry->ctrl_info.in_dst_ip);
153 seq_printf(m, "%-16s%s%-14lu%-12u",
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);
159 if (in_entry->shortcut)
160 seq_printf(m, " %-3d %-3d",
161 in_entry->shortcut->vpi,
162 in_entry->shortcut->vci);
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 for (i = 0; i < ATM_ESA_LEN; i++)
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),
175 (eg_entry->ctrl_info.holding_time -
176 (now.tv_sec-eg_entry->tv.tv_sec)),
177 eg_entry->packets_rcvd);
179 /* latest IP address */
180 sprintf(ip_string, "%pI4", &eg_entry->latest_ip_addr);
181 seq_printf(m, "%-16s", ip_string);
183 if (eg_entry->shortcut)
184 seq_printf(m, " %-3d %-3d",
185 eg_entry->shortcut->vpi,
186 eg_entry->shortcut->vci);
193 static const struct seq_operations mpc_op = {
200 static int proc_mpc_open(struct inode *inode, struct file *file)
202 return seq_open(file, &mpc_op);
205 static ssize_t proc_mpc_write(struct file *file, const char __user *buff,
206 size_t nbytes, loff_t *ppos)
214 if (nbytes >= PAGE_SIZE)
215 nbytes = PAGE_SIZE-1;
217 page = (char *)__get_free_page(GFP_KERNEL);
221 for (p = page, len = 0; len < nbytes; p++, len++) {
222 if (get_user(*p, buff++)) {
223 free_page((unsigned long)page);
226 if (*p == '\0' || *p == '\n')
232 if (!parse_qos(page))
233 printk("mpoa: proc_mpc_write: could not parse '%s'\n", page);
235 free_page((unsigned long)page);
240 static int parse_qos(const char *buff)
242 /* possible lines look like this
243 * add 130.230.54.142 tx=max_pcr,max_sdu rx=max_pcr,max_sdu
246 int tx_pcr, tx_sdu, rx_pcr, rx_sdu;
250 memset(&qos, 0, sizeof(struct atm_qos));
252 if (sscanf(buff, "del %hhu.%hhu.%hhu.%hhu",
253 ip, ip+1, ip+2, ip+3) == 4) {
254 ipaddr = *(__be32 *)ip;
255 return atm_mpoa_delete_qos(atm_mpoa_search_qos(ipaddr));
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) {
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)
266 ipaddr = *(__be32 *)ip;
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;
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);
278 atm_mpoa_add_qos(ipaddr, &qos);
283 * INITIALIZATION function - called when module is initialized/loaded.
285 int mpc_proc_init(void)
287 struct proc_dir_entry *p;
289 p = proc_create(STAT_FILE_NAME, 0, atm_proc_root, &mpc_file_operations);
291 pr_err("Unable to initialize /proc/atm/%s\n", STAT_FILE_NAME);
298 * DELETING function - called when module is removed.
300 void mpc_proc_clean(void)
302 remove_proc_entry(STAT_FILE_NAME, atm_proc_root);
305 #endif /* CONFIG_PROC_FS */