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 <linux/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(format, args...) \ 25 printk(KERN_DEBUG "mpoa:%s: " format, __FILE__, ##args) /* debug */ 26 #else 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) 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, 50 size_t nbytes, loff_t *ppos); 51 52 static int parse_qos(const char *buff); 53 54 /* 55 * Define allowed FILE OPERATIONS 56 */ 57 static const struct file_operations mpc_file_operations = { 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 */ 69 static const char *ingress_state_string(int state) 70 { 71 switch (state) { 72 case INGRESS_RESOLVING: 73 return "resolving "; 74 case INGRESS_RESOLVED: 75 return "resolved "; 76 case INGRESS_INVALID: 77 return "invalid "; 78 case INGRESS_REFRESHING: 79 return "refreshing "; 80 } 81 82 return ""; 83 } 84 85 /* 86 * Returns the state of an egress cache entry as a string 87 */ 88 static const char *egress_state_string(int state) 89 { 90 switch (state) { 91 case EGRESS_RESOLVED: 92 return "resolved "; 93 case EGRESS_PURGE: 94 return "purge "; 95 case EGRESS_INVALID: 96 return "invalid "; 97 } 98 99 return ""; 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; 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 } 146 147 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); 150 151 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", 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); 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 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); 178 179 /* latest IP address */ 180 sprintf(ip_string, "%pI4", &eg_entry->latest_ip_addr); 181 seq_printf(m, "%-16s", ip_string); 182 183 if (eg_entry->shortcut) 184 seq_printf(m, " %-3d %-3d", 185 eg_entry->shortcut->vpi, 186 eg_entry->shortcut->vci); 187 seq_printf(m, "\n"); 188 } 189 seq_printf(m, "\n"); 190 return 0; 191 } 192 193 static const struct seq_operations mpc_op = { 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, 206 size_t nbytes, loff_t *ppos) 207 { 208 char *page, *p; 209 unsigned len; 210 211 if (nbytes == 0) 212 return 0; 213 214 if (nbytes >= PAGE_SIZE) 215 nbytes = PAGE_SIZE-1; 216 217 page = (char *)__get_free_page(GFP_KERNEL); 218 if (!page) 219 return -ENOMEM; 220 221 for (p = page, len = 0; len < nbytes; p++, len++) { 222 if (get_user(*p, buff++)) { 223 free_page((unsigned long)page); 224 return -EFAULT; 225 } 226 if (*p == '\0' || *p == '\n') 227 break; 228 } 229 230 *p = '\0'; 231 232 if (!parse_qos(page)) 233 printk("mpoa: proc_mpc_write: could not parse '%s'\n", page); 234 235 free_page((unsigned long)page); 236 237 return len; 238 } 239 240 static int parse_qos(const char *buff) 241 { 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]; 246 int tx_pcr, tx_sdu, rx_pcr, rx_sdu; 247 __be32 ipaddr; 248 struct atm_qos qos; 249 250 memset(&qos, 0, sizeof(struct atm_qos)); 251 252 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)); 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; 265 266 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; 273 qos.aal = ATM_AAL5; 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); 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; 288 289 p = proc_create(STAT_FILE_NAME, 0, atm_proc_root, &mpc_file_operations); 290 if (!p) { 291 pr_err("Unable to initialize /proc/atm/%s\n", STAT_FILE_NAME); 292 return -ENOMEM; 293 } 294 return 0; 295 } 296 297 /* 298 * DELETING function - called when module is removed. 299 */ 300 void mpc_proc_clean(void) 301 { 302 remove_proc_entry(STAT_FILE_NAME, atm_proc_root); 303 } 304 305 #endif /* CONFIG_PROC_FS */ 306 307 308 309 310 311 312