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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228// SPDX-License-Identifier: GPL-2.0-only/* * Error string handling * * Plan 9 uses error strings, Unix uses error numbers. These functions * try to help manage that and provide for dynamically adding error * mappings. * * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com> * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov> */
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/module.h>#include <linux/list.h>#include <linux/jhash.h>#include <linux/errno.h>#include <linux/hashtable.h>#include <net/9p/9p.h>
/** * struct errormap - map string errors from Plan 9 to Linux numeric ids * @name: string sent over 9P * @val: numeric id most closely representing @name * @namelen: length of string * @list: hash-table list for string lookup */struct errormap { char *name; int val;
int namelen; struct hlist_node list;};
#define ERRHASH_BITS 5static DEFINE_HASHTABLE(hash_errmap, ERRHASH_BITS);
/* FixMe - reduce to a reasonable size */static struct errormap errmap[] = { {"Operation not permitted", EPERM}, {"wstat prohibited", EPERM}, {"No such file or directory", ENOENT}, {"directory entry not found", ENOENT}, {"file not found", ENOENT}, {"Interrupted system call", EINTR}, {"Input/output error", EIO}, {"No such device or address", ENXIO}, {"Argument list too long", E2BIG}, {"Bad file descriptor", EBADF}, {"Resource temporarily unavailable", EAGAIN}, {"Cannot allocate memory", ENOMEM}, {"Permission denied", EACCES}, {"Bad address", EFAULT}, {"Block device required", ENOTBLK}, {"Device or resource busy", EBUSY}, {"File exists", EEXIST}, {"Invalid cross-device link", EXDEV}, {"No such device", ENODEV}, {"Not a directory", ENOTDIR}, {"Is a directory", EISDIR}, {"Invalid argument", EINVAL}, {"Too many open files in system", ENFILE}, {"Too many open files", EMFILE}, {"Text file busy", ETXTBSY}, {"File too large", EFBIG}, {"No space left on device", ENOSPC}, {"Illegal seek", ESPIPE}, {"Read-only file system", EROFS}, {"Too many links", EMLINK}, {"Broken pipe", EPIPE}, {"Numerical argument out of domain", EDOM}, {"Numerical result out of range", ERANGE}, {"Resource deadlock avoided", EDEADLK}, {"File name too long", ENAMETOOLONG}, {"No locks available", ENOLCK}, {"Function not implemented", ENOSYS}, {"Directory not empty", ENOTEMPTY}, {"Too many levels of symbolic links", ELOOP}, {"No message of desired type", ENOMSG}, {"Identifier removed", EIDRM}, {"No data available", ENODATA}, {"Machine is not on the network", ENONET}, {"Package not installed", ENOPKG}, {"Object is remote", EREMOTE}, {"Link has been severed", ENOLINK}, {"Communication error on send", ECOMM}, {"Protocol error", EPROTO}, {"Bad message", EBADMSG}, {"File descriptor in bad state", EBADFD}, {"Streams pipe error", ESTRPIPE}, {"Too many users", EUSERS}, {"Socket operation on non-socket", ENOTSOCK}, {"Message too long", EMSGSIZE}, {"Protocol not available", ENOPROTOOPT}, {"Protocol not supported", EPROTONOSUPPORT}, {"Socket type not supported", ESOCKTNOSUPPORT}, {"Operation not supported", EOPNOTSUPP}, {"Protocol family not supported", EPFNOSUPPORT}, {"Network is down", ENETDOWN}, {"Network is unreachable", ENETUNREACH}, {"Network dropped connection on reset", ENETRESET}, {"Software caused connection abort", ECONNABORTED}, {"Connection reset by peer", ECONNRESET}, {"No buffer space available", ENOBUFS}, {"Transport endpoint is already connected", EISCONN}, {"Transport endpoint is not connected", ENOTCONN}, {"Cannot send after transport endpoint shutdown", ESHUTDOWN}, {"Connection timed out", ETIMEDOUT}, {"Connection refused", ECONNREFUSED}, {"Host is down", EHOSTDOWN}, {"No route to host", EHOSTUNREACH}, {"Operation already in progress", EALREADY}, {"Operation now in progress", EINPROGRESS}, {"Is a named type file", EISNAM}, {"Remote I/O error", EREMOTEIO}, {"Disk quota exceeded", EDQUOT},/* errors from fossil, vacfs, and u9fs */ {"fid unknown or out of range", EBADF}, {"permission denied", EACCES}, {"file does not exist", ENOENT}, {"authentication failed", ECONNREFUSED}, {"bad offset in directory read", ESPIPE}, {"bad use of fid", EBADF}, {"wstat can't convert between files and directories", EPERM}, {"directory is not empty", ENOTEMPTY}, {"file exists", EEXIST}, {"file already exists", EEXIST}, {"file or directory already exists", EEXIST}, {"fid already in use", EBADF}, {"file in use", ETXTBSY}, {"i/o error", EIO}, {"file already open for I/O", ETXTBSY}, {"illegal mode", EINVAL}, {"illegal name", ENAMETOOLONG}, {"not a directory", ENOTDIR}, {"not a member of proposed group", EPERM}, {"not owner", EACCES}, {"only owner can change group in wstat", EACCES}, {"read only file system", EROFS}, {"no access to special file", EPERM}, {"i/o count too large", EIO}, {"unknown group", EINVAL}, {"unknown user", EINVAL}, {"bogus wstat buffer", EPROTO}, {"exclusive use file already open", EAGAIN}, {"corrupted directory entry", EIO}, {"corrupted file entry", EIO}, {"corrupted block label", EIO}, {"corrupted meta data", EIO}, {"illegal offset", EINVAL}, {"illegal path element", ENOENT}, {"root of file system is corrupted", EIO}, {"corrupted super block", EIO}, {"protocol botch", EPROTO}, {"file system is full", ENOSPC}, {"file is in use", EAGAIN}, {"directory entry is not allocated", ENOENT}, {"file is read only", EROFS}, {"file has been removed", EIDRM}, {"only support truncation to zero length", EPERM}, {"cannot remove root", EPERM}, {"file too big", EFBIG}, {"venti i/o error", EIO}, /* these are not errors */ {"u9fs rhostsauth: no authentication required", 0}, {"u9fs authnone: no authentication required", 0}, {NULL, -1}};
/** * p9_error_init - preload mappings into hash list * */
int p9_error_init(void){ struct errormap *c; u32 hash;
/* load initial error map into hash table */ for (c = errmap; c->name; c++) { c->namelen = strlen(c->name); hash = jhash(c->name, c->namelen, 0); INIT_HLIST_NODE(&c->list); hash_add(hash_errmap, &c->list, hash); }
return 1;}EXPORT_SYMBOL(p9_error_init);
/** * p9_errstr2errno - convert error string to error number * @errstr: error string * @len: length of error string * */
int p9_errstr2errno(char *errstr, int len){ int errno; struct errormap *c; u32 hash;
errno = 0; c = NULL; hash = jhash(errstr, len, 0); hash_for_each_possible(hash_errmap, c, list, hash) { if (c->namelen == len && !memcmp(c->name, errstr, len)) { errno = c->val; break; } }
if (errno == 0) { /* TODO: if error isn't found, add it dynamically */ errstr[len] = 0; pr_err("%s: server reported unknown error %s\n", __func__, errstr); errno = ESERVERFAULT; }
return -errno;}EXPORT_SYMBOL(p9_errstr2errno);