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kernel.h is being used as a dump for all kinds of stuff for a long time. Here is the attempt to start cleaning it up by splitting out mathematical helpers. At the same time convert users in header and lib folder to use new header. Though for time being include new header back to kernel.h to avoid twisted indirected includes for existing users. [sfr@canb.auug.org.au: fix powerpc build] Link: https://lkml.kernel.org/r/20201029150809.13059608@canb.auug.org.au Link: https://lkml.kernel.org/r/20201028173212.41768-1-andriy.shevchenko@linux.intel.com Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: "Paul E. McKenney" <paulmck@kernel.org> Cc: Trond Myklebust <trond.myklebust@hammerspace.com> Cc: Jeff Layton <jlayton@kernel.org> Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
225 lines
3.7 KiB
C
225 lines
3.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/build_bug.h>
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#include <linux/errno.h>
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#include <linux/errname.h>
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#include <linux/kernel.h>
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#include <linux/math.h>
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/*
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* Ensure these tables do not accidentally become gigantic if some
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* huge errno makes it in. On most architectures, the first table will
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* only have about 140 entries, but mips and parisc have more sparsely
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* allocated errnos (with EHWPOISON = 257 on parisc, and EDQUOT = 1133
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* on mips), so this wastes a bit of space on those - though we
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* special case the EDQUOT case.
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*/
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#define E(err) [err + BUILD_BUG_ON_ZERO(err <= 0 || err > 300)] = "-" #err
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static const char *names_0[] = {
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E(E2BIG),
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E(EACCES),
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E(EADDRINUSE),
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E(EADDRNOTAVAIL),
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E(EADV),
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E(EAFNOSUPPORT),
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E(EALREADY),
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E(EBADE),
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E(EBADF),
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E(EBADFD),
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E(EBADMSG),
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E(EBADR),
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E(EBADRQC),
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E(EBADSLT),
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E(EBFONT),
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E(EBUSY),
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#ifdef ECANCELLED
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E(ECANCELLED),
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#endif
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E(ECHILD),
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E(ECHRNG),
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E(ECOMM),
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E(ECONNABORTED),
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E(ECONNRESET),
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E(EDEADLOCK),
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E(EDESTADDRREQ),
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E(EDOM),
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E(EDOTDOT),
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#ifndef CONFIG_MIPS
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E(EDQUOT),
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#endif
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E(EEXIST),
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E(EFAULT),
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E(EFBIG),
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E(EHOSTDOWN),
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E(EHOSTUNREACH),
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E(EHWPOISON),
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E(EIDRM),
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E(EILSEQ),
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#ifdef EINIT
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E(EINIT),
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#endif
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E(EINPROGRESS),
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E(EINTR),
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E(EINVAL),
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E(EIO),
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E(EISCONN),
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E(EISDIR),
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E(EISNAM),
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E(EKEYEXPIRED),
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E(EKEYREJECTED),
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E(EKEYREVOKED),
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E(EL2HLT),
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E(EL2NSYNC),
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E(EL3HLT),
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E(EL3RST),
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E(ELIBACC),
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E(ELIBBAD),
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E(ELIBEXEC),
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E(ELIBMAX),
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E(ELIBSCN),
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E(ELNRNG),
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E(ELOOP),
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E(EMEDIUMTYPE),
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E(EMFILE),
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E(EMLINK),
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E(EMSGSIZE),
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E(EMULTIHOP),
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E(ENAMETOOLONG),
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E(ENAVAIL),
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E(ENETDOWN),
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E(ENETRESET),
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E(ENETUNREACH),
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E(ENFILE),
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E(ENOANO),
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E(ENOBUFS),
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E(ENOCSI),
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E(ENODATA),
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E(ENODEV),
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E(ENOENT),
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E(ENOEXEC),
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E(ENOKEY),
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E(ENOLCK),
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E(ENOLINK),
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E(ENOMEDIUM),
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E(ENOMEM),
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E(ENOMSG),
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E(ENONET),
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E(ENOPKG),
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E(ENOPROTOOPT),
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E(ENOSPC),
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E(ENOSR),
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E(ENOSTR),
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#ifdef ENOSYM
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E(ENOSYM),
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#endif
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E(ENOSYS),
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E(ENOTBLK),
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E(ENOTCONN),
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E(ENOTDIR),
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E(ENOTEMPTY),
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E(ENOTNAM),
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E(ENOTRECOVERABLE),
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E(ENOTSOCK),
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E(ENOTTY),
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E(ENOTUNIQ),
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E(ENXIO),
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E(EOPNOTSUPP),
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E(EOVERFLOW),
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E(EOWNERDEAD),
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E(EPERM),
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E(EPFNOSUPPORT),
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E(EPIPE),
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#ifdef EPROCLIM
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E(EPROCLIM),
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#endif
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E(EPROTO),
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E(EPROTONOSUPPORT),
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E(EPROTOTYPE),
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E(ERANGE),
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E(EREMCHG),
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#ifdef EREMDEV
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E(EREMDEV),
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#endif
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E(EREMOTE),
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E(EREMOTEIO),
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#ifdef EREMOTERELEASE
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E(EREMOTERELEASE),
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#endif
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E(ERESTART),
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E(ERFKILL),
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E(EROFS),
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#ifdef ERREMOTE
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E(ERREMOTE),
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#endif
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E(ESHUTDOWN),
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E(ESOCKTNOSUPPORT),
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E(ESPIPE),
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E(ESRCH),
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E(ESRMNT),
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E(ESTALE),
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E(ESTRPIPE),
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E(ETIME),
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E(ETIMEDOUT),
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E(ETOOMANYREFS),
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E(ETXTBSY),
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E(EUCLEAN),
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E(EUNATCH),
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E(EUSERS),
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E(EXDEV),
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E(EXFULL),
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E(ECANCELED), /* ECANCELLED */
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E(EAGAIN), /* EWOULDBLOCK */
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E(ECONNREFUSED), /* EREFUSED */
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E(EDEADLK), /* EDEADLOCK */
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};
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#undef E
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#define E(err) [err - 512 + BUILD_BUG_ON_ZERO(err < 512 || err > 550)] = "-" #err
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static const char *names_512[] = {
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E(ERESTARTSYS),
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E(ERESTARTNOINTR),
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E(ERESTARTNOHAND),
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E(ENOIOCTLCMD),
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E(ERESTART_RESTARTBLOCK),
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E(EPROBE_DEFER),
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E(EOPENSTALE),
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E(ENOPARAM),
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E(EBADHANDLE),
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E(ENOTSYNC),
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E(EBADCOOKIE),
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E(ENOTSUPP),
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E(ETOOSMALL),
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E(ESERVERFAULT),
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E(EBADTYPE),
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E(EJUKEBOX),
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E(EIOCBQUEUED),
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E(ERECALLCONFLICT),
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};
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#undef E
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static const char *__errname(unsigned err)
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{
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if (err < ARRAY_SIZE(names_0))
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return names_0[err];
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if (err >= 512 && err - 512 < ARRAY_SIZE(names_512))
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return names_512[err - 512];
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/* But why? */
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if (IS_ENABLED(CONFIG_MIPS) && err == EDQUOT) /* 1133 */
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return "-EDQUOT";
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return NULL;
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}
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/*
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* errname(EIO) -> "EIO"
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* errname(-EIO) -> "-EIO"
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*/
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const char *errname(int err)
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{
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const char *name = __errname(abs(err));
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if (!name)
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return NULL;
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return err > 0 ? name + 1 : name;
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}
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