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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 | /* * linux/fs/proc/net.c * * Copyright (C) 1991, 1992 Linus Torvalds * * gjh 3/'93 heim@peanuts.informatik.uni-tuebingen.de (Gerald J. Heim) * most of this file is stolen from base.c * it works, but you shouldn't use it as a guideline * for new proc-fs entries. once i'll make it better. * fvk 3/'93 waltje@uwalt.nl.mugnet.org (Fred N. van Kempen) * cleaned up the whole thing, moved "net" specific code to * the NET kernel layer (where it belonged in the first place). * Michael K. Johnson (johnsonm@stolaf.edu) 3/93 * Added support from my previous inet.c. Cleaned things up * quite a bit, modularized the code. * fvk 4/'93 waltje@uwalt.nl.mugnet.org (Fred N. van Kempen) * Renamed "route_get_info()" to "rt_get_info()" for consistency. * Alan Cox (gw4pts@gw4pts.ampr.org) 4/94 * Dusted off the code and added IPX. Fixed the 4K limit. * Erik Schoenfelder (schoenfr@ibr.cs.tu-bs.de) * /proc/net/snmp. * * proc net directory handling functions */ #include <linux/autoconf.h> #include <asm/segment.h> #include <linux/errno.h> #include <linux/sched.h> #include <linux/proc_fs.h> #include <linux/stat.h> /* forward references */ static int proc_readnet(struct inode * inode, struct file * file, char * buf, int count); static int proc_readnetdir(struct inode *, struct file *, struct dirent *, int); static int proc_lookupnet(struct inode *,const char *,int,struct inode **); /* the get_*_info() functions are in the net code, and are configured in via the standard mechanism... */ extern int unix_get_info(char *, char **, off_t, int); #ifdef CONFIG_INET extern int tcp_get_info(char *, char **, off_t, int); extern int udp_get_info(char *, char **, off_t, int); extern int raw_get_info(char *, char **, off_t, int); extern int arp_get_info(char *, char **, off_t, int); extern int rarp_get_info(char *, char **, off_t, int); extern int dev_get_info(char *, char **, off_t, int); extern int rt_get_info(char *, char **, off_t, int); extern int snmp_get_info(char *, char **, off_t, int); #endif /* CONFIG_INET */ #ifdef CONFIG_IPX extern int ipx_get_info(char *, char **, off_t, int); extern int ipx_rt_get_info(char *, char **, off_t, int); #endif /* CONFIG_IPX */ #ifdef CONFIG_AX25 extern int ax25_get_info(char *, char **, off_t, int); extern int ax25_rt_get_info(char *, char **, off_t, int); #ifdef CONFIG_NETROM extern int nr_get_info(char *, char **, off_t, int); extern int nr_nodes_get_info(char *, char **, off_t, int); extern int nr_neigh_get_info(char *, char **, off_t, int); #endif /* CONFIG_NETROM */ #endif /* CONFIG_AX25 */ static struct file_operations proc_net_operations = { NULL, /* lseek - default */ proc_readnet, /* read - bad */ NULL, /* write - bad */ proc_readnetdir, /* readdir */ NULL, /* select - default */ NULL, /* ioctl - default */ NULL, /* mmap */ NULL, /* no special open code */ NULL, /* no special release code */ NULL /* can't fsync */ }; /* * proc directories can do almost nothing.. */ struct inode_operations proc_net_inode_operations = { &proc_net_operations, /* default net directory file-ops */ NULL, /* create */ proc_lookupnet, /* lookup */ NULL, /* link */ NULL, /* unlink */ NULL, /* symlink */ NULL, /* mkdir */ NULL, /* rmdir */ NULL, /* mknod */ NULL, /* rename */ NULL, /* readlink */ NULL, /* follow_link */ NULL, /* bmap */ NULL, /* truncate */ NULL /* permission */ }; static struct proc_dir_entry net_dir[] = { { PROC_NET, 1, "." }, { PROC_ROOT_INO, 2, ".." }, { PROC_NET_UNIX, 4, "unix" }, #ifdef CONFIG_INET { PROC_NET_ARP, 3, "arp" }, { PROC_NET_ROUTE, 5, "route" }, { PROC_NET_DEV, 3, "dev" }, { PROC_NET_RAW, 3, "raw" }, { PROC_NET_TCP, 3, "tcp" }, { PROC_NET_UDP, 3, "udp" }, { PROC_NET_SNMP, 4, "snmp" }, #ifdef CONFIG_INET_RARP { PROC_NET_RARP, 4, "rarp"}, #endif #endif /* CONFIG_INET */ #ifdef CONFIG_IPX { PROC_NET_IPX_ROUTE, 9, "ipx_route" }, { PROC_NET_IPX, 3, "ipx" }, #endif /* CONFIG_IPX */ #ifdef CONFIG_AX25 { PROC_NET_AX25_ROUTE, 10, "ax25_route" }, { PROC_NET_AX25, 4, "ax25" }, #ifdef CONFIG_NETROM { PROC_NET_NR_NODES, 8, "nr_nodes" }, { PROC_NET_NR_NEIGH, 8, "nr_neigh" }, { PROC_NET_NR, 2, "nr" }, #endif /* CONFIG_NETROM */ #endif /* CONFIG_AX25 */ { 0, 0, NULL } }; #define NR_NET_DIRENTRY ((sizeof (net_dir))/(sizeof (net_dir[0])) - 1) static int proc_lookupnet(struct inode * dir,const char * name, int len, struct inode ** result) { struct proc_dir_entry *de; *result = NULL; if (!dir) return -ENOENT; if (!S_ISDIR(dir->i_mode)) { iput(dir); return -ENOENT; } for (de = net_dir ; de->name ; de++) { if (!proc_match(len, name, de)) continue; *result = iget(dir->i_sb, de->low_ino); iput(dir); if (!*result) return -ENOENT; return 0; } return -ENOENT; } static int proc_readnetdir(struct inode * inode, struct file * filp, struct dirent * dirent, int count) { struct proc_dir_entry * de; unsigned int ino; int i,j; if (!inode || !S_ISDIR(inode->i_mode)) return -EBADF; ino = inode->i_ino; if (((unsigned) filp->f_pos) < NR_NET_DIRENTRY) { de = net_dir + filp->f_pos; filp->f_pos++; i = de->namelen; ino = de->low_ino; put_fs_long(ino, &dirent->d_ino); put_fs_word(i,&dirent->d_reclen); put_fs_byte(0,i+dirent->d_name); j = i; while (i--) put_fs_byte(de->name[i], i+dirent->d_name); return j; } return 0; } #define PROC_BLOCK_SIZE (3*1024) /* 4K page size but our output routines use some slack for overruns */ static int proc_readnet(struct inode * inode, struct file * file, char * buf, int count) { char * page; int length; unsigned int ino; int bytes=count; int thistime; int copied=0; char *start; if (count < 0) return -EINVAL; if (!(page = (char*) __get_free_page(GFP_KERNEL))) return -ENOMEM; ino = inode->i_ino; while(bytes>0) { thistime=bytes; if(bytes>PROC_BLOCK_SIZE) thistime=PROC_BLOCK_SIZE; switch (ino) { case PROC_NET_UNIX: length = unix_get_info(page,&start,file->f_pos,thistime); break; #ifdef CONFIG_INET case PROC_NET_ARP: length = arp_get_info(page,&start,file->f_pos,thistime); break; case PROC_NET_ROUTE: length = rt_get_info(page,&start,file->f_pos,thistime); break; case PROC_NET_DEV: length = dev_get_info(page,&start,file->f_pos,thistime); break; case PROC_NET_RAW: length = raw_get_info(page,&start,file->f_pos,thistime); break; case PROC_NET_TCP: length = tcp_get_info(page,&start,file->f_pos,thistime); break; case PROC_NET_UDP: length = udp_get_info(page,&start,file->f_pos,thistime); break; case PROC_NET_SNMP: length = snmp_get_info(page, &start, file->f_pos,thistime); break; #ifdef CONFIG_INET_RARP case PROC_NET_RARP: length = rarp_get_info(page,&start,file->f_pos,thistime); break; #endif /* CONFIG_INET_RARP */ #endif /* CONFIG_INET */ #ifdef CONFIG_IPX case PROC_NET_IPX_ROUTE: length = ipx_rt_get_info(page,&start,file->f_pos,thistime); break; case PROC_NET_IPX: length = ipx_get_info(page,&start,file->f_pos,thistime); break; #endif /* CONFIG_IPX */ #ifdef CONFIG_AX25 case PROC_NET_AX25_ROUTE: length = ax25_rt_get_info(page,&start,file->f_pos,thistime); break; case PROC_NET_AX25: length = ax25_get_info(page,&start,file->f_pos,thistime); break; #ifdef CONFIG_NETROM case PROC_NET_NR_NODES: length = nr_nodes_get_info(page,&start,file->f_pos,thistime); break; case PROC_NET_NR_NEIGH: length = nr_neigh_get_info(page,&start,file->f_pos,thistime); break; case PROC_NET_NR: length = nr_get_info(page,&start,file->f_pos,thistime); break; #endif /* CONFIG_NETROM */ #endif /* CONFIG_AX25 */ default: free_page((unsigned long) page); return -EBADF; } /* * We have been given a non page aligned block of * the data we asked for + a bit. We have been given * the start pointer and we know the length.. */ if (length <= 0) break; /* * Copy the bytes */ memcpy_tofs(buf+copied, start, length); file->f_pos+=length; /* Move down the file */ bytes-=length; copied+=length; if(length<thistime) break; /* End of file */ } free_page((unsigned long) page); return copied; } |