1 /* 2 * linux/fs/9p/error.c 3 * 4 * Error string handling 5 * 6 * Plan 9 uses error strings, Unix uses error numbers. These functions 7 * try to help manage that and provide for dynamically adding error 8 * mappings. 9 * 10 * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com> 11 * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov> 12 * 13 * This program is free software; you can redistribute it and/or modify 14 * it under the terms of the GNU General Public License version 2 15 * as published by the Free Software Foundation. 16 * 17 * This program is distributed in the hope that it will be useful, 18 * but WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 * GNU General Public License for more details. 21 * 22 * You should have received a copy of the GNU General Public License 23 * along with this program; if not, write to: 24 * Free Software Foundation 25 * 51 Franklin Street, Fifth Floor 26 * Boston, MA 02111-1301 USA 27 * 28 */ 29 30 #include <linux/module.h> 31 #include <linux/list.h> 32 #include <linux/jhash.h> 33 #include <linux/errno.h> 34 #include <net/9p/9p.h> 35 36 struct errormap { 37 char *name; 38 int val; 39 40 int namelen; 41 struct hlist_node list; 42 }; 43 44 #define ERRHASHSZ 32 45 static struct hlist_head hash_errmap[ERRHASHSZ]; 46 47 /* FixMe - reduce to a reasonable size */ 48 static struct errormap errmap[] = { 49 {"Operation not permitted", EPERM}, 50 {"wstat prohibited", EPERM}, 51 {"No such file or directory", ENOENT}, 52 {"directory entry not found", ENOENT}, 53 {"file not found", ENOENT}, 54 {"Interrupted system call", EINTR}, 55 {"Input/output error", EIO}, 56 {"No such device or address", ENXIO}, 57 {"Argument list too long", E2BIG}, 58 {"Bad file descriptor", EBADF}, 59 {"Resource temporarily unavailable", EAGAIN}, 60 {"Cannot allocate memory", ENOMEM}, 61 {"Permission denied", EACCES}, 62 {"Bad address", EFAULT}, 63 {"Block device required", ENOTBLK}, 64 {"Device or resource busy", EBUSY}, 65 {"File exists", EEXIST}, 66 {"Invalid cross-device link", EXDEV}, 67 {"No such device", ENODEV}, 68 {"Not a directory", ENOTDIR}, 69 {"Is a directory", EISDIR}, 70 {"Invalid argument", EINVAL}, 71 {"Too many open files in system", ENFILE}, 72 {"Too many open files", EMFILE}, 73 {"Text file busy", ETXTBSY}, 74 {"File too large", EFBIG}, 75 {"No space left on device", ENOSPC}, 76 {"Illegal seek", ESPIPE}, 77 {"Read-only file system", EROFS}, 78 {"Too many links", EMLINK}, 79 {"Broken pipe", EPIPE}, 80 {"Numerical argument out of domain", EDOM}, 81 {"Numerical result out of range", ERANGE}, 82 {"Resource deadlock avoided", EDEADLK}, 83 {"File name too long", ENAMETOOLONG}, 84 {"No locks available", ENOLCK}, 85 {"Function not implemented", ENOSYS}, 86 {"Directory not empty", ENOTEMPTY}, 87 {"Too many levels of symbolic links", ELOOP}, 88 {"No message of desired type", ENOMSG}, 89 {"Identifier removed", EIDRM}, 90 {"No data available", ENODATA}, 91 {"Machine is not on the network", ENONET}, 92 {"Package not installed", ENOPKG}, 93 {"Object is remote", EREMOTE}, 94 {"Link has been severed", ENOLINK}, 95 {"Communication error on send", ECOMM}, 96 {"Protocol error", EPROTO}, 97 {"Bad message", EBADMSG}, 98 {"File descriptor in bad state", EBADFD}, 99 {"Streams pipe error", ESTRPIPE}, 100 {"Too many users", EUSERS}, 101 {"Socket operation on non-socket", ENOTSOCK}, 102 {"Message too long", EMSGSIZE}, 103 {"Protocol not available", ENOPROTOOPT}, 104 {"Protocol not supported", EPROTONOSUPPORT}, 105 {"Socket type not supported", ESOCKTNOSUPPORT}, 106 {"Operation not supported", EOPNOTSUPP}, 107 {"Protocol family not supported", EPFNOSUPPORT}, 108 {"Network is down", ENETDOWN}, 109 {"Network is unreachable", ENETUNREACH}, 110 {"Network dropped connection on reset", ENETRESET}, 111 {"Software caused connection abort", ECONNABORTED}, 112 {"Connection reset by peer", ECONNRESET}, 113 {"No buffer space available", ENOBUFS}, 114 {"Transport endpoint is already connected", EISCONN}, 115 {"Transport endpoint is not connected", ENOTCONN}, 116 {"Cannot send after transport endpoint shutdown", ESHUTDOWN}, 117 {"Connection timed out", ETIMEDOUT}, 118 {"Connection refused", ECONNREFUSED}, 119 {"Host is down", EHOSTDOWN}, 120 {"No route to host", EHOSTUNREACH}, 121 {"Operation already in progress", EALREADY}, 122 {"Operation now in progress", EINPROGRESS}, 123 {"Is a named type file", EISNAM}, 124 {"Remote I/O error", EREMOTEIO}, 125 {"Disk quota exceeded", EDQUOT}, 126 /* errors from fossil, vacfs, and u9fs */ 127 {"fid unknown or out of range", EBADF}, 128 {"permission denied", EACCES}, 129 {"file does not exist", ENOENT}, 130 {"authentication failed", ECONNREFUSED}, 131 {"bad offset in directory read", ESPIPE}, 132 {"bad use of fid", EBADF}, 133 {"wstat can't convert between files and directories", EPERM}, 134 {"directory is not empty", ENOTEMPTY}, 135 {"file exists", EEXIST}, 136 {"file already exists", EEXIST}, 137 {"file or directory already exists", EEXIST}, 138 {"fid already in use", EBADF}, 139 {"file in use", ETXTBSY}, 140 {"i/o error", EIO}, 141 {"file already open for I/O", ETXTBSY}, 142 {"illegal mode", EINVAL}, 143 {"illegal name", ENAMETOOLONG}, 144 {"not a directory", ENOTDIR}, 145 {"not a member of proposed group", EPERM}, 146 {"not owner", EACCES}, 147 {"only owner can change group in wstat", EACCES}, 148 {"read only file system", EROFS}, 149 {"no access to special file", EPERM}, 150 {"i/o count too large", EIO}, 151 {"unknown group", EINVAL}, 152 {"unknown user", EINVAL}, 153 {"bogus wstat buffer", EPROTO}, 154 {"exclusive use file already open", EAGAIN}, 155 {"corrupted directory entry", EIO}, 156 {"corrupted file entry", EIO}, 157 {"corrupted block label", EIO}, 158 {"corrupted meta data", EIO}, 159 {"illegal offset", EINVAL}, 160 {"illegal path element", ENOENT}, 161 {"root of file system is corrupted", EIO}, 162 {"corrupted super block", EIO}, 163 {"protocol botch", EPROTO}, 164 {"file system is full", ENOSPC}, 165 {"file is in use", EAGAIN}, 166 {"directory entry is not allocated", ENOENT}, 167 {"file is read only", EROFS}, 168 {"file has been removed", EIDRM}, 169 {"only support truncation to zero length", EPERM}, 170 {"cannot remove root", EPERM}, 171 {"file too big", EFBIG}, 172 {"venti i/o error", EIO}, 173 /* these are not errors */ 174 {"u9fs rhostsauth: no authentication required", 0}, 175 {"u9fs authnone: no authentication required", 0}, 176 {NULL, -1} 177 }; 178 179 /** 180 * p9_error_init - preload 181 * @errstr: error string 182 * 183 */ 184 185 int p9_error_init(void) 186 { 187 struct errormap *c; 188 int bucket; 189 190 /* initialize hash table */ 191 for (bucket = 0; bucket < ERRHASHSZ; bucket++) 192 INIT_HLIST_HEAD(&hash_errmap[bucket]); 193 194 /* load initial error map into hash table */ 195 for (c = errmap; c->name != NULL; c++) { 196 c->namelen = strlen(c->name); 197 bucket = jhash(c->name, c->namelen, 0) % ERRHASHSZ; 198 INIT_HLIST_NODE(&c->list); 199 hlist_add_head(&c->list, &hash_errmap[bucket]); 200 } 201 202 return 1; 203 } 204 EXPORT_SYMBOL(p9_error_init); 205 206 /** 207 * errstr2errno - convert error string to error number 208 * @errstr: error string 209 * 210 */ 211 212 int p9_errstr2errno(char *errstr, int len) 213 { 214 int errno; 215 struct hlist_node *p; 216 struct errormap *c; 217 int bucket; 218 219 errno = 0; 220 p = NULL; 221 c = NULL; 222 bucket = jhash(errstr, len, 0) % ERRHASHSZ; 223 hlist_for_each_entry(c, p, &hash_errmap[bucket], list) { 224 if (c->namelen == len && !memcmp(c->name, errstr, len)) { 225 errno = c->val; 226 break; 227 } 228 } 229 230 if (errno == 0) { 231 /* TODO: if error isn't found, add it dynamically */ 232 errstr[len] = 0; 233 printk(KERN_ERR "%s: errstr :%s: not found\n", __FUNCTION__, 234 errstr); 235 errno = 1; 236 } 237 238 return -errno; 239 } 240 EXPORT_SYMBOL(p9_errstr2errno); 241