ceph/src/spdk/dpdk/lib/librte_eal/common/include/rte_log.h

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2017 Intel Corporation
   3  */
   4
   5 #ifndef _RTE_LOG_H_
   6 #define _RTE_LOG_H_
   7
   8 /**
   9  * @file
  10  *
  11  * RTE Logs API
  12  *
  13  * This file provides a log API to RTE applications.
  14  */
  15
  16 #ifdef __cplusplus
  17 extern "C" {
  18 #endif
  19
  20 #include <stdint.h>
  21 #include <stdio.h>
  22 #include <stdarg.h>
  23 #include <sys/queue.h>
  24
  25 #include <rte_common.h>
  26 #include <rte_config.h>
  27
  28 struct rte_log_dynamic_type;
  29
  30 /** The rte_log structure. */
  31 struct rte_logs {
  32         uint32_t type;  /**< Bitfield with enabled logs. */
  33         uint32_t level; /**< Log level. */
  34         FILE *file;     /**< Output file set by rte_openlog_stream, or NULL. */
  35         size_t dynamic_types_len;
  36         struct rte_log_dynamic_type *dynamic_types;
  37 };
  38
  39 /** Global log informations */
  40 extern struct rte_logs rte_logs;
  41
  42 /* SDK log type */
  43 #define RTE_LOGTYPE_EAL        0 /**< Log related to eal. */
  44 #define RTE_LOGTYPE_MALLOC     1 /**< Log related to malloc. */
  45 #define RTE_LOGTYPE_RING       2 /**< Log related to ring. */
  46 #define RTE_LOGTYPE_MEMPOOL    3 /**< Log related to mempool. */
  47 #define RTE_LOGTYPE_TIMER      4 /**< Log related to timers. */
  48 #define RTE_LOGTYPE_PMD        5 /**< Log related to poll mode driver. */
  49 #define RTE_LOGTYPE_HASH       6 /**< Log related to hash table. */
  50 #define RTE_LOGTYPE_LPM        7 /**< Log related to LPM. */
  51 #define RTE_LOGTYPE_KNI        8 /**< Log related to KNI. */
  52 #define RTE_LOGTYPE_ACL        9 /**< Log related to ACL. */
  53 #define RTE_LOGTYPE_POWER     10 /**< Log related to power. */
  54 #define RTE_LOGTYPE_METER     11 /**< Log related to QoS meter. */
  55 #define RTE_LOGTYPE_SCHED     12 /**< Log related to QoS port scheduler. */
  56 #define RTE_LOGTYPE_PORT      13 /**< Log related to port. */
  57 #define RTE_LOGTYPE_TABLE     14 /**< Log related to table. */
  58 #define RTE_LOGTYPE_PIPELINE  15 /**< Log related to pipeline. */
  59 #define RTE_LOGTYPE_MBUF      16 /**< Log related to mbuf. */
  60 #define RTE_LOGTYPE_CRYPTODEV 17 /**< Log related to cryptodev. */
  61 #define RTE_LOGTYPE_EFD       18 /**< Log related to EFD. */
  62 #define RTE_LOGTYPE_EVENTDEV  19 /**< Log related to eventdev. */
  63 #define RTE_LOGTYPE_GSO       20 /**< Log related to GSO. */
  64
  65 /* these log types can be used in an application */
  66 #define RTE_LOGTYPE_USER1     24 /**< User-defined log type 1. */
  67 #define RTE_LOGTYPE_USER2     25 /**< User-defined log type 2. */
  68 #define RTE_LOGTYPE_USER3     26 /**< User-defined log type 3. */
  69 #define RTE_LOGTYPE_USER4     27 /**< User-defined log type 4. */
  70 #define RTE_LOGTYPE_USER5     28 /**< User-defined log type 5. */
  71 #define RTE_LOGTYPE_USER6     29 /**< User-defined log type 6. */
  72 #define RTE_LOGTYPE_USER7     30 /**< User-defined log type 7. */
  73 #define RTE_LOGTYPE_USER8     31 /**< User-defined log type 8. */
  74
  75 /** First identifier for extended logs */
  76 #define RTE_LOGTYPE_FIRST_EXT_ID 32
  77
  78 /* Can't use 0, as it gives compiler warnings */
  79 #define RTE_LOG_EMERG    1U  /**< System is unusable.               */
  80 #define RTE_LOG_ALERT    2U  /**< Action must be taken immediately. */
  81 #define RTE_LOG_CRIT     3U  /**< Critical conditions.              */
  82 #define RTE_LOG_ERR      4U  /**< Error conditions.                 */
  83 #define RTE_LOG_WARNING  5U  /**< Warning conditions.               */
  84 #define RTE_LOG_NOTICE   6U  /**< Normal but significant condition. */
  85 #define RTE_LOG_INFO     7U  /**< Informational.                    */
  86 #define RTE_LOG_DEBUG    8U  /**< Debug-level messages.             */
  87
  88 /**
  89  * Change the stream that will be used by the logging system.
  90  *
  91  * This can be done at any time. The f argument represents the stream
  92  * to be used to send the logs. If f is NULL, the default output is
  93  * used (stderr).
  94  *
  95  * @param f
  96  *   Pointer to the stream.
  97  * @return
  98  *   - 0 on success.
  99  *   - Negative on error.
 100  */
 101 int rte_openlog_stream(FILE *f);
 102
 103 /**
 104  * Set the global log level.
 105  *
 106  * After this call, logs with a level lower or equal than the level
 107  * passed as argument will be displayed.
 108  *
 109  * @param level
 110  *   Log level. A value between RTE_LOG_EMERG (1) and RTE_LOG_DEBUG (8).
 111  */
 112 void rte_log_set_global_level(uint32_t level);
 113
 114 /**
 115  * Get the global log level.
 116  *
 117  * @return
 118  *   The current global log level.
 119  */
 120 uint32_t rte_log_get_global_level(void);
 121
 122 /**
 123  * Get the log level for a given type.
 124  *
 125  * @param logtype
 126  *   The log type identifier.
 127  * @return
 128  *   0 on success, a negative value if logtype is invalid.
 129  */
 130 int rte_log_get_level(uint32_t logtype);
 131
 132 /**
 133  * Set the log level for a given type based on shell pattern.
 134  *
 135  * @param pattern
 136  *   The match pattern identifying the log type.
 137  * @param level
 138  *   The level to be set.
 139  * @return
 140  *   0 on success, a negative value if level is invalid.
 141  */
 142 int rte_log_set_level_pattern(const char *pattern, uint32_t level);
 143
 144 /**
 145  * Set the log level for a given type based on regular expression.
 146  *
 147  * @param regex
 148  *   The regular expression identifying the log type.
 149  * @param level
 150  *   The level to be set.
 151  * @return
 152  *   0 on success, a negative value if level is invalid.
 153  */
 154 int rte_log_set_level_regexp(const char *regex, uint32_t level);
 155
 156 /**
 157  * Set the log level for a given type.
 158  *
 159  * @param logtype
 160  *   The log type identifier.
 161  * @param level
 162  *   The level to be set.
 163  * @return
 164  *   0 on success, a negative value if logtype or level is invalid.
 165  */
 166 int rte_log_set_level(uint32_t logtype, uint32_t level);
 167
 168 /**
 169  * Get the current loglevel for the message being processed.
 170  *
 171  * Before calling the user-defined stream for logging, the log
 172  * subsystem sets a per-lcore variable containing the loglevel and the
 173  * logtype of the message being processed. This information can be
 174  * accessed by the user-defined log output function through this
 175  * function.
 176  *
 177  * @return
 178  *   The loglevel of the message being processed.
 179  */
 180 int rte_log_cur_msg_loglevel(void);
 181
 182 /**
 183  * Get the current logtype for the message being processed.
 184  *
 185  * Before calling the user-defined stream for logging, the log
 186  * subsystem sets a per-lcore variable containing the loglevel and the
 187  * logtype of the message being processed. This information can be
 188  * accessed by the user-defined log output function through this
 189  * function.
 190  *
 191  * @return
 192  *   The logtype of the message being processed.
 193  */
 194 int rte_log_cur_msg_logtype(void);
 195
 196 /**
 197  * Register a dynamic log type
 198  *
 199  * If a log is already registered with the same type, the returned value
 200  * is the same than the previous one.
 201  *
 202  * @param name
 203  *   The string identifying the log type.
 204  * @return
 205  *   - >0: success, the returned value is the log type identifier.
 206  *   - (-ENOMEM): cannot allocate memory.
 207  */
 208 int rte_log_register(const char *name);
 209
 210 /**
 211  * @warning
 212  * @b EXPERIMENTAL: this API may change without prior notice
 213  *
 214  * Register a dynamic log type and try to pick its level from EAL options
 215  *
 216  * rte_log_register() is called inside. If successful, the function tries
 217  * to search for matching regexp in the list of EAL log level options and
 218  * pick the level from the last matching entry. If nothing can be applied
 219  * from the list, the level will be set to the user-defined default value.
 220  *
 221  * @param name
 222  *    Name for the log type to be registered
 223  * @param level_def
 224  *    Fallback level to be set if the global list has no matching options
 225  * @return
 226  *    - >=0: the newly registered log type
 227  *    - <0: rte_log_register() error value
 228  */
 229 int rte_log_register_type_and_pick_level(const char *name, uint32_t level_def);
 230
 231 /**
 232  * Dump log information.
 233  *
 234  * Dump the global level and the registered log types.
 235  *
 236  * @param f
 237  *   The output stream where the dump should be sent.
 238  */
 239 void rte_log_dump(FILE *f);
 240
 241 /**
 242  * Generates a log message.
 243  *
 244  * The message will be sent in the stream defined by the previous call
 245  * to rte_openlog_stream().
 246  *
 247  * The level argument determines if the log should be displayed or
 248  * not, depending on the global rte_logs variable.
 249  *
 250  * The preferred alternative is the RTE_LOG() because it adds the
 251  * level and type in the logged string.
 252  *
 253  * @param level
 254  *   Log level. A value between RTE_LOG_EMERG (1) and RTE_LOG_DEBUG (8).
 255  * @param logtype
 256  *   The log type, for example, RTE_LOGTYPE_EAL.
 257  * @param format
 258  *   The format string, as in printf(3), followed by the variable arguments
 259  *   required by the format.
 260  * @return
 261  *   - 0: Success.
 262  *   - Negative on error.
 263  */
 264 int rte_log(uint32_t level, uint32_t logtype, const char *format, ...)
 265 #ifdef __GNUC__
 266 #if (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ > 2))
 267         __attribute__((cold))
 268 #endif
 269 #endif
 270         __attribute__((format(printf, 3, 4)));
 271
 272 /**
 273  * Generates a log message.
 274  *
 275  * The message will be sent in the stream defined by the previous call
 276  * to rte_openlog_stream().
 277  *
 278  * The level argument determines if the log should be displayed or
 279  * not, depending on the global rte_logs variable. A trailing
 280  * newline may be added if needed.
 281  *
 282  * The preferred alternative is the RTE_LOG() because it adds the
 283  * level and type in the logged string.
 284  *
 285  * @param level
 286  *   Log level. A value between RTE_LOG_EMERG (1) and RTE_LOG_DEBUG (8).
 287  * @param logtype
 288  *   The log type, for example, RTE_LOGTYPE_EAL.
 289  * @param format
 290  *   The format string, as in printf(3), followed by the variable arguments
 291  *   required by the format.
 292  * @param ap
 293  *   The va_list of the variable arguments required by the format.
 294  * @return
 295  *   - 0: Success.
 296  *   - Negative on error.
 297  */
 298 int rte_vlog(uint32_t level, uint32_t logtype, const char *format, va_list ap)
 299         __attribute__((format(printf,3,0)));
 300
 301 /**
 302  * Generates a log message.
 303  *
 304  * The RTE_LOG() is a helper that prefixes the string with the log level
 305  * and type, and call rte_log().
 306  *
 307  * @param l
 308  *   Log level. A value between EMERG (1) and DEBUG (8). The short name is
 309  *   expanded by the macro, so it cannot be an integer value.
 310  * @param t
 311  *   The log type, for example, EAL. The short name is expanded by the
 312  *   macro, so it cannot be an integer value.
 313  * @param ...
 314  *   The fmt string, as in printf(3), followed by the variable arguments
 315  *   required by the format.
 316  * @return
 317  *   - 0: Success.
 318  *   - Negative on error.
 319  */
 320 #define RTE_LOG(l, t, ...)                                      \
 321          rte_log(RTE_LOG_ ## l,                                 \
 322                  RTE_LOGTYPE_ ## t, # t ": " __VA_ARGS__)
 323
 324 /**
 325  * Generates a log message for data path.
 326  *
 327  * Similar to RTE_LOG(), except that it is removed at compilation time
 328  * if the RTE_LOG_DP_LEVEL configuration option is lower than the log
 329  * level argument.
 330  *
 331  * @param l
 332  *   Log level. A value between EMERG (1) and DEBUG (8). The short name is
 333  *   expanded by the macro, so it cannot be an integer value.
 334  * @param t
 335  *   The log type, for example, EAL. The short name is expanded by the
 336  *   macro, so it cannot be an integer value.
 337  * @param ...
 338  *   The fmt string, as in printf(3), followed by the variable arguments
 339  *   required by the format.
 340  * @return
 341  *   - 0: Success.
 342  *   - Negative on error.
 343  */
 344 #define RTE_LOG_DP(l, t, ...)                                   \
 345         (void)((RTE_LOG_ ## l <= RTE_LOG_DP_LEVEL) ?            \
 346          rte_log(RTE_LOG_ ## l,                                 \
 347                  RTE_LOGTYPE_ ## t, # t ": " __VA_ARGS__) :     \
 348          0)
 349
 350 #ifdef __cplusplus
 351 }
 352 #endif
 353
 354 #endif /* _RTE_LOG_H_ */