ceph/src/spdk/dpdk/lib/librte_eal/common/eal_common_errno.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2014 Intel Corporation
   3  */
   4
   5 /* Use XSI-compliant portable version of strerror_r() */
   6 #undef _GNU_SOURCE
   7
   8 #include <stdint.h>
   9 #include <stdio.h>
  10 #include <string.h>
  11 #include <stdarg.h>
  12 #include <errno.h>
  13
  14 #include <rte_per_lcore.h>
  15 #include <rte_errno.h>
  16 #include <rte_string_fns.h>
  17
  18 RTE_DEFINE_PER_LCORE(int, _rte_errno);
  19
  20 const char *
  21 rte_strerror(int errnum)
  22 {
  23         /* BSD puts a colon in the "unknown error" messages, Linux doesn't */
  24 #ifdef RTE_EXEC_ENV_FREEBSD
  25         static const char *sep = ":";
  26 #else
  27         static const char *sep = "";
  28 #endif
  29 #define RETVAL_SZ 256
  30         static RTE_DEFINE_PER_LCORE(char[RETVAL_SZ], retval);
  31         char *ret = RTE_PER_LCORE(retval);
  32
  33         /* since some implementations of strerror_r throw an error
  34          * themselves if errnum is too big, we handle that case here */
  35         if (errnum >= RTE_MAX_ERRNO)
  36                 snprintf(ret, RETVAL_SZ, "Unknown error%s %d", sep, errnum);
  37         else
  38                 switch (errnum){
  39                 case E_RTE_SECONDARY:
  40                         return "Invalid call in secondary process";
  41                 case E_RTE_NO_CONFIG:
  42                         return "Missing rte_config structure";
  43                 default:
  44                         if (strerror_r(errnum, ret, RETVAL_SZ) != 0)
  45                                 snprintf(ret, RETVAL_SZ, "Unknown error%s %d",
  46                                                 sep, errnum);
  47                 }
  48
  49         return ret;
  50 }