net/atm: Convert printk to pr_<level>
[linux-3.10.git] / net / atm / mpoa_proc.c
1 #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
2
3 #ifdef CONFIG_PROC_FS
4 #include <linux/errno.h>
5 #include <linux/kernel.h>
6 #include <linux/string.h>
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>
12 #include <asm/uaccess.h>
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
20  * file system statistics
21  */
22
23 #if 1
24 #define dprintk printk   /* debug */
25 #else
26 #define dprintk(format,args...)
27 #endif
28
29 #define STAT_FILE_NAME "mpc"     /* Our statistic file's name */
30
31 extern struct mpoa_client *mpcs;
32 extern struct proc_dir_entry *atm_proc_root;  /* from proc.c. */
33
34 static int proc_mpc_open(struct inode *inode, struct file *file);
35 static ssize_t proc_mpc_write(struct file *file, const char __user *buff,
36                               size_t nbytes, loff_t *ppos);
37
38 static int parse_qos(const char *buff);
39
40 /*
41  *   Define allowed FILE OPERATIONS
42  */
43 static const struct file_operations mpc_file_operations = {
44         .owner =        THIS_MODULE,
45         .open =         proc_mpc_open,
46         .read =         seq_read,
47         .llseek =       seq_lseek,
48         .write =        proc_mpc_write,
49         .release =      seq_release,
50 };
51
52 /*
53  * Returns the state of an ingress cache entry as a string
54  */
55 static const char *ingress_state_string(int state){
56         switch(state) {
57         case INGRESS_RESOLVING:
58                 return "resolving  ";
59                 break;
60         case INGRESS_RESOLVED:
61                 return "resolved   ";
62                 break;
63         case INGRESS_INVALID:
64                 return "invalid    ";
65                 break;
66         case INGRESS_REFRESHING:
67                 return "refreshing ";
68                 break;
69         default:
70                return "";
71         }
72 }
73
74 /*
75  * Returns the state of an egress cache entry as a string
76  */
77 static const char *egress_state_string(int state){
78         switch(state) {
79         case EGRESS_RESOLVED:
80                 return "resolved   ";
81                 break;
82         case EGRESS_PURGE:
83                 return "purge      ";
84                 break;
85         case EGRESS_INVALID:
86                 return "invalid    ";
87                 break;
88         default:
89                return "";
90         }
91 }
92
93 /*
94  * FIXME: mpcs (and per-mpc lists) have no locking whatsoever.
95  */
96
97 static void *mpc_start(struct seq_file *m, loff_t *pos)
98 {
99         loff_t l = *pos;
100         struct mpoa_client *mpc;
101
102         if (!l--)
103                 return SEQ_START_TOKEN;
104         for (mpc = mpcs; mpc; mpc = mpc->next)
105                 if (!l--)
106                         return mpc;
107         return NULL;
108 }
109
110 static void *mpc_next(struct seq_file *m, void *v, loff_t *pos)
111 {
112         struct mpoa_client *p = v;
113         (*pos)++;
114         return v == SEQ_START_TOKEN ? mpcs : p->next;
115 }
116
117 static void mpc_stop(struct seq_file *m, void *v)
118 {
119 }
120
121 /*
122  * READING function - called when the /proc/atm/mpoa file is read from.
123  */
124 static int mpc_show(struct seq_file *m, void *v)
125 {
126         struct mpoa_client *mpc = v;
127         unsigned char *temp;
128         int i;
129         in_cache_entry *in_entry;
130         eg_cache_entry *eg_entry;
131         struct timeval now;
132         unsigned char ip_string[16];
133
134         if (v == SEQ_START_TOKEN) {
135                 atm_mpoa_disp_qos(m);
136                 return 0;
137         }
138
139         seq_printf(m, "\nInterface %d:\n\n", mpc->dev_num);
140         seq_printf(m, "Ingress Entries:\nIP address      State      Holding time  Packets fwded  VPI  VCI\n");
141         do_gettimeofday(&now);
142
143         for (in_entry = mpc->in_cache; in_entry; in_entry = in_entry->next) {
144                 temp = (unsigned char *)&in_entry->ctrl_info.in_dst_ip;
145                 sprintf(ip_string,"%d.%d.%d.%d", temp[0], temp[1], temp[2], temp[3]);
146                 seq_printf(m, "%-16s%s%-14lu%-12u",
147                               ip_string,
148                               ingress_state_string(in_entry->entry_state),
149                               in_entry->ctrl_info.holding_time-(now.tv_sec-in_entry->tv.tv_sec),
150                               in_entry->packets_fwded);
151                 if (in_entry->shortcut)
152                         seq_printf(m, "   %-3d  %-3d",in_entry->shortcut->vpi,in_entry->shortcut->vci);
153                 seq_printf(m, "\n");
154         }
155
156         seq_printf(m, "\n");
157         seq_printf(m, "Egress Entries:\nIngress MPC ATM addr\nCache-id        State      Holding time  Packets recvd  Latest IP addr   VPI VCI\n");
158         for (eg_entry = mpc->eg_cache; eg_entry; eg_entry = eg_entry->next) {
159                 unsigned char *p = eg_entry->ctrl_info.in_MPC_data_ATM_addr;
160                 for(i = 0; i < ATM_ESA_LEN; i++)
161                         seq_printf(m, "%02x", p[i]);
162                 seq_printf(m, "\n%-16lu%s%-14lu%-15u",
163                            (unsigned long)ntohl(eg_entry->ctrl_info.cache_id),
164                            egress_state_string(eg_entry->entry_state),
165                            (eg_entry->ctrl_info.holding_time-(now.tv_sec-eg_entry->tv.tv_sec)),
166                            eg_entry->packets_rcvd);
167
168                 /* latest IP address */
169                 temp = (unsigned char *)&eg_entry->latest_ip_addr;
170                 sprintf(ip_string, "%d.%d.%d.%d", temp[0], temp[1], temp[2], temp[3]);
171                 seq_printf(m, "%-16s", ip_string);
172
173                 if (eg_entry->shortcut)
174                         seq_printf(m, " %-3d %-3d",eg_entry->shortcut->vpi,eg_entry->shortcut->vci);
175                 seq_printf(m, "\n");
176         }
177         seq_printf(m, "\n");
178         return 0;
179 }
180
181 static const struct seq_operations mpc_op = {
182         .start =        mpc_start,
183         .next =         mpc_next,
184         .stop =         mpc_stop,
185         .show =         mpc_show
186 };
187
188 static int proc_mpc_open(struct inode *inode, struct file *file)
189 {
190         return seq_open(file, &mpc_op);
191 }
192
193 static ssize_t proc_mpc_write(struct file *file, const char __user *buff,
194                               size_t nbytes, loff_t *ppos)
195 {
196         char *page, *p;
197         unsigned len;
198
199         if (nbytes == 0)
200                 return 0;
201
202         if (nbytes >= PAGE_SIZE)
203                 nbytes = PAGE_SIZE-1;
204
205         page = (char *)__get_free_page(GFP_KERNEL);
206         if (!page)
207                 return -ENOMEM;
208
209         for (p = page, len = 0; len < nbytes; p++, len++) {
210                 if (get_user(*p, buff++)) {
211                         free_page((unsigned long)page);
212                         return -EFAULT;
213                 }
214                 if (*p == '\0' || *p == '\n')
215                         break;
216         }
217
218         *p = '\0';
219
220         if (!parse_qos(page))
221                 printk("mpoa: proc_mpc_write: could not parse '%s'\n", page);
222
223         free_page((unsigned long)page);
224
225         return len;
226 }
227
228 static int parse_qos(const char *buff)
229 {
230         /* possible lines look like this
231          * add 130.230.54.142 tx=max_pcr,max_sdu rx=max_pcr,max_sdu
232          */
233         unsigned char ip[4];
234         int tx_pcr, tx_sdu, rx_pcr, rx_sdu;
235         __be32 ipaddr;
236         struct atm_qos qos;
237
238         memset(&qos, 0, sizeof(struct atm_qos));
239
240         if (sscanf(buff, "del %hhu.%hhu.%hhu.%hhu",
241                         ip, ip+1, ip+2, ip+3) == 4) {
242                 ipaddr = *(__be32 *)ip;
243                 return atm_mpoa_delete_qos(atm_mpoa_search_qos(ipaddr));
244         }
245
246         if (sscanf(buff, "add %hhu.%hhu.%hhu.%hhu tx=%d,%d rx=tx",
247                         ip, ip+1, ip+2, ip+3, &tx_pcr, &tx_sdu) == 6) {
248                 rx_pcr = tx_pcr;
249                 rx_sdu = tx_sdu;
250         } else if (sscanf(buff, "add %hhu.%hhu.%hhu.%hhu tx=%d,%d rx=%d,%d",
251                 ip, ip+1, ip+2, ip+3, &tx_pcr, &tx_sdu, &rx_pcr, &rx_sdu) != 8)
252                 return 0;
253
254         ipaddr = *(__be32 *)ip;
255         qos.txtp.traffic_class = ATM_CBR;
256         qos.txtp.max_pcr = tx_pcr;
257         qos.txtp.max_sdu = tx_sdu;
258         qos.rxtp.traffic_class = ATM_CBR;
259         qos.rxtp.max_pcr = rx_pcr;
260         qos.rxtp.max_sdu = rx_sdu;
261         qos.aal = ATM_AAL5;
262         dprintk("mpoa: mpoa_proc.c: parse_qos(): setting qos paramameters to tx=%d,%d rx=%d,%d\n",
263                 qos.txtp.max_pcr,
264                 qos.txtp.max_sdu,
265                 qos.rxtp.max_pcr,
266                 qos.rxtp.max_sdu
267                 );
268
269         atm_mpoa_add_qos(ipaddr, &qos);
270         return 1;
271 }
272
273 /*
274  * INITIALIZATION function - called when module is initialized/loaded.
275  */
276 int mpc_proc_init(void)
277 {
278         struct proc_dir_entry *p;
279
280         p = proc_create(STAT_FILE_NAME, 0, atm_proc_root, &mpc_file_operations);
281         if (!p) {
282                 pr_err("Unable to initialize /proc/atm/%s\n", STAT_FILE_NAME);
283                 return -ENOMEM;
284         }
285         return 0;
286 }
287
288 /*
289  * DELETING function - called when module is removed.
290  */
291 void mpc_proc_clean(void)
292 {
293         remove_proc_entry(STAT_FILE_NAME,atm_proc_root);
294 }
295
296
297 #endif /* CONFIG_PROC_FS */
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