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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 | /* * 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. * * 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 *); #ifdef CONFIG_INET extern int tcp_get_info(char *); extern int udp_get_info(char *); extern int raw_get_info(char *); extern int arp_get_info(char *); extern int dev_get_info(char *); extern int rt_get_info(char *); #endif /* CONFIG_INET */ 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[] = { { 1,2,".." }, { 8,1,"." }, { 128,4,"unix" } #ifdef CONFIG_INET ,{ 129,3,"arp" }, { 130,5,"route" }, { 131,3,"dev" }, { 132,3,"raw" }, { 133,3,"tcp" }, { 134,3,"udp" } #endif /* CONFIG_INET */ }; #define NR_NET_DIRENTRY ((sizeof (net_dir))/(sizeof (net_dir[0]))) static int proc_lookupnet(struct inode * dir,const char * name, int len, struct inode ** result) { unsigned int ino; int i; *result = NULL; if (!dir) return -ENOENT; if (!S_ISDIR(dir->i_mode)) { iput(dir); return -ENOENT; } i = NR_NET_DIRENTRY; while (i-- > 0 && !proc_match(len,name,net_dir+i)) /* nothing */; if (i < 0) { iput(dir); return -ENOENT; } ino = net_dir[i].low_ino; if (!(*result = iget(dir->i_sb,ino))) { iput(dir); return -ENOENT; } iput(dir); return 0; } 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; } static int proc_readnet(struct inode * inode, struct file * file, char * buf, int count) { char * page; int length; int end; unsigned int ino; if (count < 0) return -EINVAL; if (!(page = (char*) __get_free_page(GFP_KERNEL))) return -ENOMEM; ino = inode->i_ino; switch (ino) { #ifdef CONFIG_INET case 128: length = unix_get_info(page); break; case 129: length = arp_get_info(page); break; case 130: length = rt_get_info(page); break; case 131: length = dev_get_info(page); break; case 132: length = raw_get_info(page); break; case 133: length = tcp_get_info(page); break; case 134: length = udp_get_info(page); break; #endif /* CONFIG_INET */ default: free_page((unsigned long) page); return -EBADF; } if (file->f_pos >= length) { free_page((unsigned long) page); return 0; } if (count + file->f_pos > length) count = length - file->f_pos; end = count + file->f_pos; memcpy_tofs(buf, page + file->f_pos, count); free_page((unsigned long) page); file->f_pos = end; return count; } |