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 <linux/gfp.h> 16 #include "mpc.h" 17 #include "mpoa_caches.h" 18 19 /* 20 * mpoa_proc.c: Implementation MPOA client's proc 21 * file system statistics 22 */ 23 24 #if 1 25 #define dprintk(format, args...) \ 26 printk(KERN_DEBUG "mpoa:%s: " format, __FILE__, ##args) /* debug */ 27 #else 28 #define dprintk(format, args...) \ 29 do { if (0) \ 30 printk(KERN_DEBUG "mpoa:%s: " format, __FILE__, ##args);\ 31 } while (0) 32 #endif 33 34 #if 0 35 #define ddprintk(format, args...) \ 36 printk(KERN_DEBUG "mpoa:%s: " format, __FILE__, ##args) /* debug */ 37 #else 38 #define ddprintk(format, args...) \ 39 do { if (0) \ 40 printk(KERN_DEBUG "mpoa:%s: " format, __FILE__, ##args);\ 41 } while (0) 42 #endif 43 44 #define STAT_FILE_NAME "mpc" /* Our statistic file's name */ 45 46 extern struct mpoa_client *mpcs; 47 extern struct proc_dir_entry *atm_proc_root; /* from proc.c. */ 48 49 static int proc_mpc_open(struct inode *inode, struct file *file); 50 static ssize_t proc_mpc_write(struct file *file, const char __user *buff, 51 size_t nbytes, loff_t *ppos); 52 53 static int parse_qos(const char *buff); 54 55 /* 56 * Define allowed FILE OPERATIONS 57 */ 58 static const struct file_operations mpc_file_operations = { 59 .owner = THIS_MODULE, 60 .open = proc_mpc_open, 61 .read = seq_read, 62 .llseek = seq_lseek, 63 .write = proc_mpc_write, 64 .release = seq_release, 65 }; 66 67 /* 68 * Returns the state of an ingress cache entry as a string 69 */ 70 static const char *ingress_state_string(int state) 71 { 72 switch (state) { 73 case INGRESS_RESOLVING: 74 return "resolving "; 75 case INGRESS_RESOLVED: 76 return "resolved "; 77 case INGRESS_INVALID: 78 return "invalid "; 79 case INGRESS_REFRESHING: 80 return "refreshing "; 81 } 82 83 return ""; 84 } 85 86 /* 87 * Returns the state of an egress cache entry as a string 88 */ 89 static const char *egress_state_string(int state) 90 { 91 switch (state) { 92 case EGRESS_RESOLVED: 93 return "resolved "; 94 case EGRESS_PURGE: 95 return "purge "; 96 case EGRESS_INVALID: 97 return "invalid "; 98 } 99 100 return ""; 101 } 102 103 /* 104 * FIXME: mpcs (and per-mpc lists) have no locking whatsoever. 105 */ 106 107 static void *mpc_start(struct seq_file *m, loff_t *pos) 108 { 109 loff_t l = *pos; 110 struct mpoa_client *mpc; 111 112 if (!l--) 113 return SEQ_START_TOKEN; 114 for (mpc = mpcs; mpc; mpc = mpc->next) 115 if (!l--) 116 return mpc; 117 return NULL; 118 } 119 120 static void *mpc_next(struct seq_file *m, void *v, loff_t *pos) 121 { 122 struct mpoa_client *p = v; 123 (*pos)++; 124 return v == SEQ_START_TOKEN ? mpcs : p->next; 125 } 126 127 static void mpc_stop(struct seq_file *m, void *v) 128 { 129 } 130 131 /* 132 * READING function - called when the /proc/atm/mpoa file is read from. 133 */ 134 static int mpc_show(struct seq_file *m, void *v) 135 { 136 struct mpoa_client *mpc = v; 137 int i; 138 in_cache_entry *in_entry; 139 eg_cache_entry *eg_entry; 140 struct timeval now; 141 unsigned char ip_string[16]; 142 143 if (v == SEQ_START_TOKEN) { 144 atm_mpoa_disp_qos(m); 145 return 0; 146 } 147 148 seq_printf(m, "\nInterface %d:\n\n", mpc->dev_num); 149 seq_printf(m, "Ingress Entries:\nIP address State Holding time Packets fwded VPI VCI\n"); 150 do_gettimeofday(&now); 151 152 for (in_entry = mpc->in_cache; in_entry; in_entry = in_entry->next) { 153 sprintf(ip_string, "%pI4", &in_entry->ctrl_info.in_dst_ip); 154 seq_printf(m, "%-16s%s%-14lu%-12u", 155 ip_string, 156 ingress_state_string(in_entry->entry_state), 157 in_entry->ctrl_info.holding_time - 158 (now.tv_sec-in_entry->tv.tv_sec), 159 in_entry->packets_fwded); 160 if (in_entry->shortcut) 161 seq_printf(m, " %-3d %-3d", 162 in_entry->shortcut->vpi, 163 in_entry->shortcut->vci); 164 seq_printf(m, "\n"); 165 } 166 167 seq_printf(m, "\n"); 168 seq_printf(m, "Egress Entries:\nIngress MPC ATM addr\nCache-id State Holding time Packets recvd Latest IP addr VPI VCI\n"); 169 for (eg_entry = mpc->eg_cache; eg_entry; eg_entry = eg_entry->next) { 170 unsigned char *p = eg_entry->ctrl_info.in_MPC_data_ATM_addr; 171 for (i = 0; i < ATM_ESA_LEN; i++) 172 seq_printf(m, "%02x", p[i]); 173 seq_printf(m, "\n%-16lu%s%-14lu%-15u", 174 (unsigned long)ntohl(eg_entry->ctrl_info.cache_id), 175 egress_state_string(eg_entry->entry_state), 176 (eg_entry->ctrl_info.holding_time - 177 (now.tv_sec-eg_entry->tv.tv_sec)), 178 eg_entry->packets_rcvd); 179 180 /* latest IP address */ 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 } 193 194 static const struct seq_operations mpc_op = { 195 .start = mpc_start, 196 .next = mpc_next, 197 .stop = mpc_stop, 198 .show = mpc_show 199 }; 200 201 static int proc_mpc_open(struct inode *inode, struct file *file) 202 { 203 return seq_open(file, &mpc_op); 204 } 205 206 static 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 } 240 241 static int parse_qos(const char *buff) 242 { 243 /* possible lines look like this 244 * add 130.230.54.142 tx=max_pcr,max_sdu rx=max_pcr,max_sdu 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 * INITIALIZATION function - called when module is initialized/loaded. 285 */ 286 int mpc_proc_init(void) 287 { 288 struct proc_dir_entry *p; 289 290 p = proc_create(STAT_FILE_NAME, 0, atm_proc_root, &mpc_file_operations); 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 * DELETING function - called when module is removed. 300 */ 301 void mpc_proc_clean(void) 302 { 303 remove_proc_entry(STAT_FILE_NAME, atm_proc_root); 304 } 305 306 #endif /* CONFIG_PROC_FS */ 307 308 309 310 311 312 313