FD.io VPP  v16.09
Vector Packet Processing
error.h
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1 /*
2  * Copyright (c) 2015 Cisco and/or its affiliates.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at:
6  *
7  * http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 /*
16  Copyright (c) 2001, 2002, 2003 Eliot Dresselhaus
17 
18  Permission is hereby granted, free of charge, to any person obtaining
19  a copy of this software and associated documentation files (the
20  "Software"), to deal in the Software without restriction, including
21  without limitation the rights to use, copy, modify, merge, publish,
22  distribute, sublicense, and/or sell copies of the Software, and to
23  permit persons to whom the Software is furnished to do so, subject to
24  the following conditions:
25 
26  The above copyright notice and this permission notice shall be
27  included in all copies or substantial portions of the Software.
28 
29  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
30  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
31  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
32  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
33  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
34  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
35  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
36 */
37 
38 #ifndef included_error_h
39 #define included_error_h
40 
41 #include <vppinfra/clib.h> /* for CLIB_LINUX_KERNEL */
43 
44 #ifdef CLIB_UNIX
45 #include <errno.h>
46 #endif
47 
48 #ifdef CLIB_LINUX_KERNEL
49 #include <linux/errno.h>
50 #endif
51 
52 #include <stdarg.h>
53 #include <vppinfra/vec.h>
54 
55 /* Callback functions for error reporting. */
56 typedef void clib_error_handler_func_t (void *arg, u8 * msg, int msg_len);
58 
59 #define clib_warning(format,args...) \
60  _clib_error (CLIB_ERROR_WARNING, clib_error_function, __LINE__, format, ## args)
61 
62 #define clib_error(format,args...) \
63  _clib_error (CLIB_ERROR_FATAL, clib_error_function, __LINE__, format, ## args)
64 
65 #define clib_unix_error(format,args...) \
66  _clib_error (CLIB_ERROR_FATAL | CLIB_ERROR_ERRNO_VALID, clib_error_function, __LINE__, format, ## args)
67 
68 #define clib_unix_warning(format,args...) \
69  _clib_error (CLIB_ERROR_WARNING | CLIB_ERROR_ERRNO_VALID, clib_error_function, __LINE__, format, ## args)
70 
71 /* For programming errors and assert. */
72 #define clib_panic(format,args...) \
73  _clib_error (CLIB_ERROR_ABORT, (char *) clib_error_function, __LINE__, format, ## args)
74 
75 typedef struct
76 {
77  /* Error message. */
78  u8 *what;
79 
80  /* Where error occurred (e.g. __FUNCTION__ __LINE__) */
81  const u8 *where;
82 
84 
85  /* Error code (e.g. errno for Unix errors). */
87 } clib_error_t;
88 
89 #define clib_error_get_code(err) ((err) ? (err)->code : 0)
90 #define clib_error_set_code(err, c) \
91 do { \
92  if (err) \
93  (err)->code = (c); \
94 } while (0)
95 
96 extern void *clib_error_free_vector (clib_error_t * errors);
97 
98 #define clib_error_free(e) e = clib_error_free_vector(e)
99 
100 extern clib_error_t *_clib_error_return (clib_error_t * errors,
101  any code,
102  uword flags,
103  char *where, char *fmt, ...);
104 
105 #define clib_error_return_code(e,code,flags,args...) \
106  _clib_error_return((e),(code),(flags),(char *)clib_error_function,args)
107 
108 #define clib_error_create(args...) \
109  clib_error_return_code(0,0,0,args)
110 
111 #define clib_error_return(e,args...) \
112  clib_error_return_code(e,0,0,args)
113 
114 #define clib_error_return_unix(e,args...) \
115  clib_error_return_code(e,errno,CLIB_ERROR_ERRNO_VALID,args)
116 
117 #define clib_error_return_fatal(e,args...) \
118  clib_error_return_code(e,0,CLIB_ERROR_FATAL,args)
119 
120 #define clib_error_return_unix_fatal(e,args...) \
121  clib_error_return_code(e,errno,CLIB_ERROR_ERRNO_VALID|CLIB_ERROR_FATAL,args)
122 
123 extern clib_error_t *_clib_error_report (clib_error_t * errors);
124 
125 #define clib_error_report(e) do { (e) = _clib_error_report (e); } while (0)
126 
127 u8 *format_clib_error (u8 * s, va_list * va);
128 
131 {
132 #ifdef CLIB_UNIX
133  switch (error)
134  {
135  case EWOULDBLOCK:
136  case EINTR:
137  return 0;
138  }
139 #endif
140  return 1;
141 }
142 
143 #define IF_ERROR_IS_FATAL_RETURN_ELSE_FREE(e) \
144 do { \
145  if (e) \
146  { \
147  if (unix_error_is_fatal (clib_error_get_code (e))) \
148  return (e); \
149  else \
150  clib_error_free (e); \
151  } \
152 } while (0)
153 
154 #define ERROR_RETURN_IF(x) \
155 do { \
156  clib_error_t * _error_return_if = (x); \
157  if (_error_return_if) \
158  return clib_error_return (_error_return_if, 0); \
159 } while (0)
160 
161 #define ERROR_ASSERT(truth) \
162 ({ \
163  clib_error_t * _error_assert = 0; \
164  if (CLIB_DEBUG > 0 && ! (truth)) \
165  { \
166  _error_assert = clib_error_return_fatal \
167  (0, "%s:%d (%s) assertion `%s' fails", \
168  __FILE__, \
169  (uword) __LINE__, \
170  clib_error_function, \
171  # truth); \
172  } \
173  _error_assert; \
174 })
175 
176 /* Assert to remain even if CLIB_DEBUG is set to 0. */
177 #define CLIB_ERROR_ASSERT(truth) \
178 ({ \
179  clib_error_t * _error_assert = 0; \
180  if (! (truth)) \
181  { \
182  _error_assert = \
183  clib_error_return_fatal \
184  (0, "%s:%d (%s) assertion `%s' fails", \
185  __FILE__, \
186  (uword) __LINE__, \
187  clib_error_function, \
188  # truth); \
189  } \
190  _error_assert; \
191 })
192 
193 #endif /* included_error_h */
194 
195 /*
196  * fd.io coding-style-patch-verification: ON
197  *
198  * Local Variables:
199  * eval: (c-set-style "gnu")
200  * End:
201  */
u8 * format_clib_error(u8 *s, va_list *va)
Definition: error.c:191
u8 * what
Definition: error.h:78
uword flags
Definition: error.h:83
#define always_inline
Definition: clib.h:84
void clib_error_handler_func_t(void *arg, u8 *msg, int msg_len)
Definition: error.h:56
any code
Definition: error.h:86
void * clib_error_free_vector(clib_error_t *errors)
Definition: error.c:182
word any
Definition: types.h:139
void clib_error_register_handler(clib_error_handler_func_t func, void *arg)
Definition: error.c:75
static word unix_error_is_fatal(word error)
Definition: error.h:130
u64 uword
Definition: types.h:112
i64 word
Definition: types.h:111
unsigned char u8
Definition: types.h:56
const u8 * where
Definition: error.h:81
u32 flags
Definition: vhost-user.h:76
CLIB vectors are ubiquitous dynamically resized arrays with by user defined "headers".