Commit Graph

9 Commits

Author SHA1 Message Date
Patrick Delaunay
b44c751efe doc: log: correct option name CONFIG_LOG_MAX_LEVEL
Replace CONFIG_(SPL_)MAX_LOG_LEVEL by the correct name as defined in
common/Kconfig:
line 668:config LOG_MAX_LEVEL
line 688:config SPL_LOG_MAX_LEVEL
line 708:config TPL_LOG_MAX_LEVEL

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2020-06-11 20:52:11 -06:00
Heinrich Schuchardt
befadde0a2 log: syslog driver
Provide a log driver that broadcasts RFC 3164 messages to syslog servers.
rsyslog is one implementation of such a server.

The messages are sent to the local broadcast address 255.255.255.255 on
port 514.

The environment variable log_hostname can be used to provide the HOSTNAME
field for the messages. The optional TIMESTAMP field of RFC 3164 is not
provided.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
2020-04-16 08:07:58 -06:00
Simon Glass
f9811e8575 log: Allow #define LOG_DEBUG to enable logging in a file
At present it is possible to '#define DEBUG' at the top of a file which
causes all debug() statements in that file to become active. There is
currently no equivalent with logging, but this is a useful function.

Add a LOG_DEBUG define along with documentation.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2019-02-20 15:21:44 +08:00
Simon Glass
8dee7b96fd log: Add documentation for convenience functions
The log_debug(), etc. function are documented only in the header file at
present. Add a section to README.log also.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2019-02-20 15:21:44 +08:00
Simon Glass
b71ac16063 log: Add units to code-size stats in README.log
Without the units these numbers are confusing. Add a comment about the
unit being 'bytes' and mention 'buildman' as the source.

Suggested-by: Lukasz Majewski <lukma@denx.de>
Signed-off-by: Simon Glass <sjg@chromium.org>
2018-04-10 11:52:16 -04:00
Heinrich Schuchardt
1973b381a1 log: add category LOGC_EFI
The EFI implementation does not fit into any of the existing categories.

Provide LOGC_EFI so that EFI related message can be filtered.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
2018-02-03 10:09:28 -07:00
Simon Glass
3707c6ee0d log: Add a way to log error-return values
When functions return an error it propagates up the stack to the point
where it is reported. Often the error code provides enough information
about the root cause of the error that this is obvious what went wrong.

However in some cases the error may be hard to trace. For example if a
driver uses several devices to perform an operation, it may not be
obvious which one failed.

Add a log_ret() macro to help with this. This can be used to wrap any
error-return value. The logging system will then output a log record when
the original error is generated, making it easy to trace the call stack
of the error.

This macro can significantly impact code size, so its use is controlled
by a Kconfig option, which is enabled for sandbox.

Signed-off-by: Simon Glass <sjg@chromium.org>
2018-02-03 10:09:27 -07:00
Simon Glass
8cb7c04248 log: Add documentation for commands and formatting
Add some notes about recent new features.

Signed-off-by: Simon Glass <sjg@chromium.org>
2018-02-03 10:09:27 -07:00
Simon Glass
1d0f30a8e0 log: Add documentation
Add documentation for the log system.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2017-12-07 15:17:00 -05:00