Merge branch '2020-10-10-log-improvements'

- Assorted improvements to our log functionality.
This commit is contained in:
Tom Rini 2020-10-11 15:22:05 -04:00
commit 726561a941
15 changed files with 279 additions and 375 deletions

View File

@ -157,6 +157,9 @@ static bool log_passes_filters(struct log_device *ldev, struct log_rec *rec)
{
struct log_filter *filt;
if (rec->force_debug)
return true;
/* If there are no filters, filter on the default log level */
if (list_empty(&ldev->filter_head)) {
if (rec->level > gd->default_log_level)
@ -204,7 +207,8 @@ static int log_dispatch(struct log_rec *rec)
/* Emit message */
processing_msg = 1;
list_for_each_entry(ldev, &gd->log_head, sibling_node) {
if (log_passes_filters(ldev, rec))
if ((ldev->flags & LOGDF_ENABLE) &&
log_passes_filters(ldev, rec))
ldev->drv->emit(ldev, rec);
}
processing_msg = 0;
@ -219,7 +223,8 @@ int _log(enum log_category_t cat, enum log_level_t level, const char *file,
va_list args;
rec.cat = cat;
rec.level = level;
rec.level = level & LOGL_LEVEL_MASK;
rec.force_debug = level & LOGL_FORCE_DEBUG;
rec.file = file;
rec.line = line;
rec.func = func;
@ -303,6 +308,44 @@ int log_remove_filter(const char *drv_name, int filter_num)
return -ENOENT;
}
/**
* log_find_device_by_drv() - Find a device by its driver
*
* @drv: Log driver
* @return Device associated with that driver, or NULL if not found
*/
static struct log_device *log_find_device_by_drv(struct log_driver *drv)
{
struct log_device *ldev;
list_for_each_entry(ldev, &gd->log_head, sibling_node) {
if (ldev->drv == drv)
return ldev;
}
/*
* It is quite hard to pass an invalid driver since passing an unknown
* LOG_GET_DRIVER(xxx) would normally produce a compilation error. But
* it is possible to pass NULL, for example, so this
*/
return NULL;
}
int log_device_set_enable(struct log_driver *drv, bool enable)
{
struct log_device *ldev;
ldev = log_find_device_by_drv(drv);
if (!ldev)
return -ENOENT;
if (enable)
ldev->flags |= LOGDF_ENABLE;
else
ldev->flags &= ~LOGDF_ENABLE;
return 0;
}
int log_init(void)
{
struct log_driver *drv = ll_entry_start(struct log_driver, log_driver);
@ -325,6 +368,7 @@ int log_init(void)
}
INIT_LIST_HEAD(&ldev->filter_head);
ldev->drv = drv;
ldev->flags = drv->flags;
list_add_tail(&ldev->sibling_node,
(struct list_head *)&gd->log_head);
drv++;

View File

@ -44,4 +44,5 @@ static int log_console_emit(struct log_device *ldev, struct log_rec *rec)
LOG_DRIVER(console) = {
.name = "console",
.emit = log_console_emit,
.flags = LOGDF_ENABLE,
};

View File

@ -39,7 +39,9 @@ static int log_syslog_emit(struct log_device *ldev, struct log_rec *rec)
char *log_hostname;
/* Setup packet buffers */
net_init();
ret = net_init();
if (ret)
return ret;
/* Disable hardware and put it into the reset state */
eth_halt();
/* Set current device according to environment variables */

View File

@ -1,286 +0,0 @@
Logging in U-Boot
=================
Introduction
------------
U-Boot's internal operation involves many different steps and actions. From
setting up the board to displaying a start-up screen to loading an Operating
System, there are many component parts each with many actions.
Most of the time this internal detail is not useful. Displaying it on the
console would delay booting (U-Boot's primary purpose) and confuse users.
But for digging into what is happening in a particular area, or for debugging
a problem it is often useful to see what U-Boot is doing in more detail than
is visible from the basic console output.
U-Boot's logging feature aims to satisfy this goal for both users and
developers.
Logging levels
--------------
There are a number logging levels available, in increasing order of verbosity:
LOGL_EMERG - Printed before U-Boot halts
LOGL_ALERT - Indicates action must be taken immediate or U-Boot will crash
LOGL_CRIT - Indicates a critical error that will cause boot failure
LOGL_ERR - Indicates an error that may cause boot failure
LOGL_WARNING - Warning about an unexpected condition
LOGL_NOTE - Important information about progress
LOGL_INFO - Information about normal boot progress
LOGL_DEBUG - Debug information (useful for debugging a driver or subsystem)
LOGL_DEBUG_CONTENT - Debug message showing full message content
LOGL_DEBUG_IO - Debug message showing hardware I/O access
Logging category
----------------
Logging can come from a wide variety of places within U-Boot. Each log message
has a category which is intended to allow messages to be filtered according to
their source.
The following main categories are defined:
LOGC_NONE - Unknown category (e.g. a debug() statement)
UCLASS_... - Related to a particular uclass (e.g. UCLASS_USB)
LOGC_ARCH - Related to architecture-specific code
LOGC_BOARD - Related to board-specific code
LOGC_CORE - Related to core driver-model support
LOGC_DT - Related to device tree control
LOGC_EFI - Related to EFI implementation
Enabling logging
----------------
The following options are used to enable logging at compile time:
CONFIG_LOG - Enables the logging system
CONFIG_LOG_MAX_LEVEL - Max log level to build (anything higher is compiled
out)
CONFIG_LOG_CONSOLE - Enable writing log records to the console
If CONFIG_LOG is not set, then no logging will be available.
The above have SPL and TPL versions also, e.g. CONFIG_SPL_LOG_MAX_LEVEL and
CONFIG_TPL_LOG_MAX_LEVEL.
Temporary logging within a single file
--------------------------------------
Sometimes it is useful to turn on logging just in one file. You can use this:
#define LOG_DEBUG
to enable building in of all logging statements in a single file. Put it at
the top of the file, before any #includes.
To actually get U-Boot to output this you need to also set the default logging
level - e.g. set CONFIG_LOG_DEFAULT_LEVEL to 7 (LOGL_DEBUG) or more. Otherwise
debug output is suppressed and will not be generated.
Convenience functions
---------------------
A number of convenience functions are available to shorten the code needed
for logging:
log_err(_fmt...)
log_warning(_fmt...)
log_notice(_fmt...)
log_info(_fmt...)
log_debug(_fmt...)
log_content(_fmt...)
log_io(_fmt...)
With these the log level is implicit in the name. The category is set by
LOG_CATEGORY, which you can only define once per file, above all #includes:
#define LOG_CATEGORY LOGC_ALLOC
or
#define LOG_CATEGORY UCLASS_SPI
Remember that all uclasses IDs are log categories too.
Log commands
------------
The 'log' command provides access to several features:
level - access the default log level
format - access the console log format
rec - output a log record
test - run tests
Type 'help log' for details.
Using DEBUG
-----------
U-Boot has traditionally used a #define called DEBUG to enable debugging on a
file-by-file basis. The debug() macro compiles to a printf() statement if
DEBUG is enabled, and an empty statement if not.
With logging enabled, debug() statements are interpreted as logging output
with a level of LOGL_DEBUG and a category of LOGC_NONE.
The logging facilities are intended to replace DEBUG, but if DEBUG is defined
at the top of a file, then it takes precedence. This means that debug()
statements will result in output to the console and this output will not be
logged.
Logging destinations
--------------------
If logging information goes nowhere then it serves no purpose. U-Boot provides
several possible determinations for logging information, all of which can be
enabled or disabled independently:
console - goes to stdout
syslog - broadcast RFC 3164 messages to syslog servers on UDP port 514
The syslog driver sends the value of environmental variable 'log_hostname' as
HOSTNAME if available.
Log format
----------
You can control the log format using the 'log format' command. The basic
format is:
LEVEL.category,file.c:123-func() message
In the above, file.c:123 is the filename where the log record was generated and
func() is the function name. By default ('log format default') only the
function name and message are displayed on the console. You can control which
fields are present, but not the field order.
Filters
-------
Filters are attached to log drivers to control what those drivers emit. Only
records that pass through the filter make it to the driver.
Filters can be based on several criteria:
- maximum log level
- in a set of categories
- in a set of files
If no filters are attached to a driver then a default filter is used, which
limits output to records with a level less than CONFIG_LOG_MAX_LEVEL.
Logging statements
------------------
The main logging function is:
log(category, level, format_string, ...)
Also debug() and error() will generate log records - these use LOG_CATEGORY
as the category, so you should #define this right at the top of the source
file to ensure the category is correct.
You can also define CONFIG_LOG_ERROR_RETURN to enable the log_ret() macro. This
can be used whenever your function returns an error value:
return log_ret(uclass_first_device(UCLASS_MMC, &dev));
This will write a log record when an error code is detected (a value < 0). This
can make it easier to trace errors that are generated deep in the call stack.
Code size
---------
Code size impact depends largely on what is enabled. The following numbers are
generated by 'buildman -S' for snow, which is a Thumb-2 board (all units in
bytes):
This series: adds bss +20.0 data +4.0 rodata +4.0 text +44.0
CONFIG_LOG: bss -52.0 data +92.0 rodata -635.0 text +1048.0
CONFIG_LOG_MAX_LEVEL=7: bss +188.0 data +4.0 rodata +49183.0 text +98124.0
The last option turns every debug() statement into a logging call, which
bloats the code hugely. The advantage is that it is then possible to enable
all logging within U-Boot.
To Do
-----
There are lots of useful additions that could be made. None of the below is
implemented! If you do one, please add a test in test/py/tests/test_log.py
Convenience functions to support setting the category:
log_arch(level, format_string, ...) - category LOGC_ARCH
log_board(level, format_string, ...) - category LOGC_BOARD
log_core(level, format_string, ...) - category LOGC_CORE
log_dt(level, format_string, ...) - category LOGC_DT
More logging destinations:
device - goes to a device (e.g. serial)
buffer - recorded in a memory buffer
Convert debug() statements in the code to log() statements
Support making printf() emit log statements a L_INFO level
Convert error() statements in the code to log() statements
Figure out what to do with BUG(), BUG_ON() and warn_non_spl()
Figure out what to do with assert()
Add a way to browse log records
Add a way to record log records for browsing using an external tool
Add commands to add and remove filters
Add commands to add and remove log devices
Allow sharing of printf format strings in log records to reduce storage size
for large numbers of log records
Add a command-line option to sandbox to set the default logging level
Convert core driver model code to use logging
Convert uclasses to use logging with the correct category
Consider making log() calls emit an automatic newline, perhaps with a logn()
function to avoid that
Passing log records through to linux (e.g. via device tree /chosen)
Provide a command to access the number of log records generated, and the
number dropped due to them being generated before the log system was ready.
Add a printf() format string pragma so that log statements are checked properly
Enhance the log console driver to show level / category / file / line
information
Add a command to add new log records and delete existing records.
Provide additional log() functions - e.g. logc() to specify the category
--
Simon Glass <sjg@chromium.org>
15-Sep-17

View File

@ -33,6 +33,9 @@ enum log_level_t {
LOGL_COUNT,
LOGL_NONE,
LOGL_LEVEL_MASK = 0xf, /* Mask for valid log levels */
LOGL_FORCE_DEBUG = 0x10, /* Mask to force output due to LOG_DEBUG */
LOGL_FIRST = LOGL_EMERG,
LOGL_MAX = LOGL_DEBUG_IO,
};
@ -133,7 +136,7 @@ static inline int _log_nop(enum log_category_t cat, enum log_level_t level,
#if CONFIG_IS_ENABLED(LOG)
#ifdef LOG_DEBUG
#define _LOG_DEBUG 1
#define _LOG_DEBUG LOGL_FORCE_DEBUG
#else
#define _LOG_DEBUG 0
#endif
@ -141,9 +144,11 @@ static inline int _log_nop(enum log_category_t cat, enum log_level_t level,
/* Emit a log record if the level is less that the maximum */
#define log(_cat, _level, _fmt, _args...) ({ \
int _l = _level; \
if (CONFIG_IS_ENABLED(LOG) && (_l <= _LOG_MAX_LEVEL || _LOG_DEBUG)) \
_log((enum log_category_t)(_cat), _l, __FILE__, __LINE__, \
__func__, \
if (CONFIG_IS_ENABLED(LOG) && \
(_LOG_DEBUG != 0 || _l <= _LOG_MAX_LEVEL)) \
_log((enum log_category_t)(_cat), \
(enum log_level_t)(_l | _LOG_DEBUG), __FILE__, \
__LINE__, __func__, \
pr_fmt(_fmt), ##_args); \
})
#else
@ -279,8 +284,12 @@ void __assert_fail(const char *assertion, const char *file, unsigned int line,
* Memebers marked as 'allocated' are allocated (e.g. via strdup()) by the log
* system.
*
* TODO(sjg@chromium.org): Compress this struct down a bit to reduce space, e.g.
* a single u32 for cat, level, line and force_debug
*
* @cat: Category, representing a uclass or part of U-Boot
* @level: Severity level, less severe is higher
* @force_debug: Force output of debug
* @file: Name of file where the log record was generated (not allocated)
* @line: Line number where the log record was generated
* @func: Function where the log record was generated (not allocated)
@ -289,6 +298,7 @@ void __assert_fail(const char *assertion, const char *file, unsigned int line,
struct log_rec {
enum log_category_t cat;
enum log_level_t level;
bool force_debug;
const char *file;
int line;
const char *func;
@ -297,10 +307,16 @@ struct log_rec {
struct log_device;
enum log_device_flags {
LOGDF_ENABLE = BIT(0), /* Device is enabled */
};
/**
* struct log_driver - a driver which accepts and processes log records
*
* @name: Name of driver
* @emit: Method to call to emit a log record via this device
* @flags: Initial value for flags (use LOGDF_ENABLE to enable on start-up)
*/
struct log_driver {
const char *name;
@ -311,6 +327,7 @@ struct log_driver {
* for processing. The filter is checked before calling this function.
*/
int (*emit)(struct log_device *ldev, struct log_rec *rec);
unsigned short flags;
};
/**
@ -323,12 +340,14 @@ struct log_driver {
* @next_filter_num: Seqence number of next filter filter added (0=no filters
* yet). This increments with each new filter on the device, but never
* decrements
* @flags: Flags for this filter (enum log_device_flags)
* @drv: Pointer to driver for this device
* @filter_head: List of filters for this device
* @sibling_node: Next device in the list of all devices
*/
struct log_device {
int next_filter_num;
unsigned short next_filter_num;
unsigned short flags;
struct log_driver *drv;
struct list_head filter_head;
struct list_head sibling_node;
@ -369,6 +388,10 @@ struct log_filter {
#define LOG_DRIVER(_name) \
ll_entry_declare(struct log_driver, _name, log_driver)
/* Get a pointer to a given driver */
#define LOG_GET_DRIVER(__name) \
ll_entry_get(struct log_driver, __name, log_driver)
/**
* log_get_cat_name() - Get the name of a category
*
@ -446,6 +469,19 @@ int log_add_filter(const char *drv_name, enum log_category_t cat_list[],
*/
int log_remove_filter(const char *drv_name, int filter_num);
/**
* log_device_set_enable() - Enable or disable a log device
*
* Devices are referenced by their driver, so use LOG_GET_DRIVER(name) to pass
* the driver to this function. For example if the driver is declared with
* LOG_DRIVER(wibble) then pass LOG_GET_DRIVER(wibble) here.
*
* @drv: Driver of device to enable
* @enable: true to enable, false to disable
* @return 0 if OK, -ENOENT if the driver was not found
*/
int log_device_set_enable(struct log_driver *drv, bool enable);
#if CONFIG_IS_ENABLED(LOG)
/**
* log_init() - Set up the log system ready for use

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@ -593,7 +593,7 @@ extern int net_ntp_time_offset; /* offset time from UTC */
#endif
/* Initialize the network adapter */
void net_init(void);
int net_init(void);
int net_loop(enum proto_t);
/* Load failed. Start again. */

View File

@ -542,6 +542,14 @@ config HEXDUMP
help
This enables functions for printing dumps of binary data.
config SPL_HEXDUMP
bool "Enable hexdump in SPL"
depends on HEXDUMP
default y
help
This enables functions for printing dumps of binary data in
SPL.
config OF_LIBFDT
bool "Enable the FDT library"
default y if OF_CONTROL

View File

@ -75,6 +75,9 @@ struct udevice *eth_get_dev(void)
struct eth_uclass_priv *uc_priv;
uc_priv = eth_get_uclass_priv();
if (!uc_priv)
return NULL;
if (!uc_priv->current)
eth_errno = uclass_first_device(UCLASS_ETH,
&uc_priv->current);

View File

@ -338,12 +338,19 @@ void net_auto_load(void)
tftp_start(TFTPGET);
}
static void net_init_loop(void)
static int net_init_loop(void)
{
if (eth_get_dev())
memcpy(net_ethaddr, eth_get_ethaddr(), 6);
else
/*
* Not ideal, but there's no way to get the actual error, and I
* don't feel like fixing all the users of eth_get_dev to deal
* with errors.
*/
return -ENONET;
return;
return 0;
}
static void net_clear_handlers(void)
@ -358,7 +365,7 @@ static void net_cleanup_loop(void)
net_clear_handlers();
}
void net_init(void)
int net_init(void)
{
static int first_call = 1;
@ -381,7 +388,7 @@ void net_init(void)
first_call = 0;
}
net_init_loop();
return net_init_loop();
}
/**********************************************************************/

View File

@ -10,6 +10,7 @@ obj-y += test-main.o
ifdef CONFIG_SANDBOX
obj-$(CONFIG_LOG_SYSLOG) += syslog_test.o
obj-$(CONFIG_LOG_SYSLOG) += syslog_test_ndebug.o
endif
ifndef CONFIG_LOG

View File

@ -196,12 +196,18 @@ static int log_test(int testnum)
log_io("level %d\n", LOGL_DEBUG_IO);
break;
}
case 11:
log_err("default\n");
ret = log_device_set_enable(LOG_GET_DRIVER(console), false);
log_err("disabled\n");
ret = log_device_set_enable(LOG_GET_DRIVER(console), true);
log_err("enabled\n");
break;
}
return 0;
}
#ifdef CONFIG_LOG_TEST
int do_log_test(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
{
int testnum = 0;
@ -216,4 +222,3 @@ int do_log_test(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
return ret ? CMD_RET_FAILURE : 0;
}
#endif

View File

@ -18,48 +18,11 @@
#include <test/suites.h>
#include <test/ut.h>
#include <asm/eth.h>
#include <syslog_test.h>
DECLARE_GLOBAL_DATA_PTR;
#define LOGF_TEST (BIT(LOGF_FUNC) | BIT(LOGF_MSG))
/**
* struct sb_log_env - private data for sandbox ethernet driver
*
* This structure is used for the private data of the sandbox ethernet
* driver.
*
* @expected: string expected to be written by the syslog driver
* @uts: unit test state
*/
struct sb_log_env {
const char *expected;
struct unit_test_state *uts;
};
/**
* sb_log_tx_handler() - transmit callback function
*
* This callback function is invoked when a network package is sent using the
* sandbox Ethernet driver. The private data of the driver holds a sb_log_env
* structure with the unit test state and the expected UDP payload.
*
* The following checks are executed:
*
* * the Ethernet packet indicates a IP broadcast message
* * the IP header is for a local UDP broadcast message to port 514
* * the UDP payload matches the expected string
*
* After testing the pointer to the expected string is set to NULL to signal
* that the callback function has been called.
*
* @dev: sandbox ethernet device
* @packet: Ethernet packet
* @len: length of Ethernet packet
* Return: 0 = success
*/
static int sb_log_tx_handler(struct udevice *dev, void *packet,
unsigned int len)
int sb_log_tx_handler(struct udevice *dev, void *packet, unsigned int len)
{
struct eth_sandbox_priv *priv = dev_get_priv(dev);
struct sb_log_env *env = priv->priv;
@ -93,6 +56,20 @@ static int sb_log_tx_handler(struct udevice *dev, void *packet,
return 0;
}
int syslog_test_setup(struct unit_test_state *uts)
{
ut_assertok(log_device_set_enable(LOG_GET_DRIVER(syslog), true));
return 0;
}
int syslog_test_finish(struct unit_test_state *uts)
{
ut_assertok(log_device_set_enable(LOG_GET_DRIVER(syslog), false));
return 0;
}
/**
* log_test_syslog_err() - test log_err() function
*
@ -104,6 +81,7 @@ static int log_test_syslog_err(struct unit_test_state *uts)
int old_log_level = gd->default_log_level;
struct sb_log_env env;
ut_assertok(syslog_test_setup(uts));
gd->log_fmt = LOGF_TEST;
gd->default_log_level = LOGL_INFO;
env_set("ethact", "eth@10002000");
@ -119,6 +97,7 @@ static int log_test_syslog_err(struct unit_test_state *uts)
sandbox_eth_set_tx_handler(0, NULL);
gd->default_log_level = old_log_level;
gd->log_fmt = log_get_default_format();
ut_assertok(syslog_test_finish(uts));
return 0;
}
@ -135,6 +114,7 @@ static int log_test_syslog_warning(struct unit_test_state *uts)
int old_log_level = gd->default_log_level;
struct sb_log_env env;
ut_assertok(syslog_test_setup(uts));
gd->log_fmt = LOGF_TEST;
gd->default_log_level = LOGL_INFO;
env_set("ethact", "eth@10002000");
@ -151,6 +131,7 @@ static int log_test_syslog_warning(struct unit_test_state *uts)
ut_assertnull(env.expected);
gd->default_log_level = old_log_level;
gd->log_fmt = log_get_default_format();
ut_assertok(syslog_test_finish(uts));
return 0;
}
@ -167,6 +148,7 @@ static int log_test_syslog_notice(struct unit_test_state *uts)
int old_log_level = gd->default_log_level;
struct sb_log_env env;
ut_assertok(syslog_test_setup(uts));
gd->log_fmt = LOGF_TEST;
gd->default_log_level = LOGL_INFO;
env_set("ethact", "eth@10002000");
@ -183,6 +165,7 @@ static int log_test_syslog_notice(struct unit_test_state *uts)
ut_assertnull(env.expected);
gd->default_log_level = old_log_level;
gd->log_fmt = log_get_default_format();
ut_assertok(syslog_test_finish(uts));
return 0;
}
@ -199,6 +182,7 @@ static int log_test_syslog_info(struct unit_test_state *uts)
int old_log_level = gd->default_log_level;
struct sb_log_env env;
ut_assertok(syslog_test_setup(uts));
gd->log_fmt = LOGF_TEST;
gd->default_log_level = LOGL_INFO;
env_set("ethact", "eth@10002000");
@ -215,6 +199,7 @@ static int log_test_syslog_info(struct unit_test_state *uts)
ut_assertnull(env.expected);
gd->default_log_level = old_log_level;
gd->log_fmt = log_get_default_format();
ut_assertok(syslog_test_finish(uts));
return 0;
}
@ -231,6 +216,7 @@ static int log_test_syslog_debug(struct unit_test_state *uts)
int old_log_level = gd->default_log_level;
struct sb_log_env env;
ut_assertok(syslog_test_setup(uts));
gd->log_fmt = LOGF_TEST;
gd->default_log_level = LOGL_DEBUG;
env_set("ethact", "eth@10002000");
@ -247,42 +233,8 @@ static int log_test_syslog_debug(struct unit_test_state *uts)
ut_assertnull(env.expected);
gd->default_log_level = old_log_level;
gd->log_fmt = log_get_default_format();
ut_assertok(syslog_test_finish(uts));
return 0;
}
LOG_TEST(log_test_syslog_debug);
/**
* log_test_syslog_nodebug() - test logging level filter
*
* Verify that log_debug() does not lead to a log message if the logging level
* is set to LOGL_INFO.
*
* @uts: unit test state
* Return: 0 = success
*/
static int log_test_syslog_nodebug(struct unit_test_state *uts)
{
int old_log_level = gd->default_log_level;
struct sb_log_env env;
gd->log_fmt = LOGF_TEST;
gd->default_log_level = LOGL_INFO;
env_set("ethact", "eth@10002000");
env_set("log_hostname", "sandbox");
env.expected = "<7>sandbox uboot: log_test_syslog_nodebug() "
"testing log_debug\n";
env.uts = uts;
sandbox_eth_set_tx_handler(0, sb_log_tx_handler);
/* Used by ut_assert macros in the tx_handler */
sandbox_eth_set_priv(0, &env);
log_debug("testing %s\n", "log_debug");
sandbox_eth_set_tx_handler(0, NULL);
/* Check that the callback function was not called */
ut_assertnonnull(env.expected);
gd->default_log_level = old_log_level;
gd->log_fmt = log_get_default_format();
return 0;
}
LOG_TEST(log_test_syslog_nodebug);

66
test/log/syslog_test.h Normal file
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@ -0,0 +1,66 @@
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (c) 2020, Heinrich Schuchardt <xypron.glpk@gmx.de>
*
* Header file for logging tests
*/
#ifndef __SYSLOG_TEST_H
#define __SYSLOG_TEST_H
#define LOGF_TEST (BIT(LOGF_FUNC) | BIT(LOGF_MSG))
/**
* struct sb_log_env - private data for sandbox ethernet driver
*
* This structure is used for the private data of the sandbox ethernet
* driver.
*
* @expected: string expected to be written by the syslog driver
* @uts: unit test state
*/
struct sb_log_env {
const char *expected;
struct unit_test_state *uts;
};
/**
* sb_log_tx_handler() - transmit callback function
*
* This callback function is invoked when a network package is sent using the
* sandbox Ethernet driver. The private data of the driver holds a sb_log_env
* structure with the unit test state and the expected UDP payload.
*
* The following checks are executed:
*
* * the Ethernet packet indicates a IP broadcast message
* * the IP header is for a local UDP broadcast message to port 514
* * the UDP payload matches the expected string
*
* After testing the pointer to the expected string is set to NULL to signal
* that the callback function has been called.
*
* @dev: sandbox ethernet device
* @packet: Ethernet packet
* @len: length of Ethernet packet
* Return: 0 = success
*/
int sb_log_tx_handler(struct udevice *dev, void *packet, unsigned int len);
/**
* syslog_test_setup() - Enable syslog logging ready for tests
*
* @uts: Test state
* @return 0 if OK, -ENOENT if the syslog log driver is not found
*/
int syslog_test_setup(struct unit_test_state *uts);
/**
* syslog_test_finish() - Disable syslog logging after tests
*
* @uts: Test state
* @return 0 if OK, -ENOENT if the syslog log driver is not found
*/
int syslog_test_finish(struct unit_test_state *uts);
#endif

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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2020, Heinrich Schuchardt <xypron.glpk@gmx.de>
*
* Logging function tests for CONFIG_LOG_SYSLOG=y.
*
* Invoke the test with: ./u-boot -d arch/sandbox/dts/test.dtb
*/
#include <common.h>
#include <dm/device.h>
#include <hexdump.h>
#include <test/log.h>
#include <test/test.h>
#include <test/suites.h>
#include <test/ut.h>
#include <asm/eth.h>
#include <syslog_test.h>
DECLARE_GLOBAL_DATA_PTR;
/**
* log_test_syslog_nodebug() - test logging level filter
*
* Verify that log_debug() does not lead to a log message if the logging level
* is set to LOGL_INFO.
*
* @uts: unit test state
* Return: 0 = success
*/
static int log_test_syslog_nodebug(struct unit_test_state *uts)
{
int old_log_level = gd->default_log_level;
struct sb_log_env env;
ut_assertok(syslog_test_setup(uts));
gd->log_fmt = LOGF_TEST;
gd->default_log_level = LOGL_INFO;
env_set("ethact", "eth@10002000");
env_set("log_hostname", "sandbox");
env.expected = "<7>sandbox uboot: log_test_syslog_nodebug() "
"testing log_debug\n";
env.uts = uts;
sandbox_eth_set_tx_handler(0, sb_log_tx_handler);
/* Used by ut_assert macros in the tx_handler */
sandbox_eth_set_priv(0, &env);
log_debug("testing %s\n", "log_debug");
sandbox_eth_set_tx_handler(0, NULL);
/* Check that the callback function was not called */
ut_assertnonnull(env.expected);
gd->default_log_level = old_log_level;
gd->log_fmt = log_get_default_format();
ut_assertok(syslog_test_finish(uts));
return 0;
}
LOG_TEST(log_test_syslog_nodebug);

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@ -92,6 +92,13 @@ def test_log(u_boot_console):
for i in range(7):
assert 'log_test() level %d' % i == next(lines)
def test11():
"""Test use of log_device_set_enable()"""
lines = run_test(11)
assert 'log_test() default'
# disabled should not be displayed
assert 'log_test() enabled'
# TODO(sjg@chromium.org): Consider structuring this as separate tests
cons = u_boot_console
test0()
@ -105,6 +112,7 @@ def test_log(u_boot_console):
test8()
test9()
test10()
test11()
@pytest.mark.buildconfigspec('cmd_log')
def test_log_format(u_boot_console):