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libdm: log: remove log_print_bypass_report calls and register new print_log_libdm for libdm during lvm initialization instead

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This fixes commit f50d4011cd which
introduced a problem when using older lvm2 code with newer libdm.
In this case, the old LVM didn't recognize new _LOG_BYPASS_REPORT flag
that libdm-report code used. This ended up with no output at all
from libdm where log_print_bypass_report was called because the
_LOG_BYPASS_REPORT was not masked properly in lvm2's print_log fn
which was called as callback function for logging.

With this patch, the lvm2 registers separate print_log_libdm logging
function for libdm instead. The print_log_libdm is exactly the same
as print_log (used throughout lvm2 code) but it checks whether we're
printing common line on output where "common" means not going to stderr,
not a warning and not an error and if we are, it adds the
_LOG_BYPASS_REPORT flag so the log_print goes directly to output, not
to any log report.

So this achieves the same goal as in f50d4011cd,
just doing it in a way that newer libdm is still compatible with older
lvm2 code (libdm-report is the only code using log_print).

Looking at the opposite mixture - older libdm with newer lvm2 code,
that won't be compilable because the new log report functionality
that is in lvm2 also requires new dm_report_group_* libdm functions
so we don't need to care here.
This commit is contained in:
Peter Rajnoha 2016-06-23 13:55:39 +02:00
parent 6eeb66e51d
commit 751163a743
5 changed files with 40 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
lib/commands/toolcontext.c
View File

@ -365,7 +365,7 @@ static void _init_logging(struct cmd_context *cmd)
/* Tell device-mapper about our logging */
#ifdef DEVMAPPER_SUPPORT
if (!dm_log_is_non_default())
dm_log_with_errno_init(print_log);
dm_log_with_errno_init(print_log_libdm);
#endif
reset_log_duplicated();
reset_lvm_errno(1);

19
lib/log/log.c
View File

@ -540,6 +540,25 @@ void print_log(int level, const char *file, int line, int dm_errno_or_class,
va_end(ap);
}
void print_log_libdm(int level, const char *file, int line, int dm_errno_or_class,
const char *format, ...)
{
va_list ap;
/*
* Bypass report if printing output from libdm and if we have
* LOG_WARN level and it's not going to stderr (so we're
* printing common message that is not an error/warning).
*/
if (!(level & _LOG_STDERR) &&
((level & ~(_LOG_STDERR|_LOG_ONCE|_LOG_BYPASS_REPORT)) == _LOG_WARN))
level |= _LOG_BYPASS_REPORT;
va_start(ap, format);
_vprint_log(level, file, line, dm_errno_or_class, format, ap);
va_end(ap);
}
log_report_t log_get_report_state(void)
{
return _log_report;

1
lib/log/log.h
View File

@ -94,7 +94,6 @@
#define log_very_verbose(args...) log_info(args)
#define log_verbose(args...) log_notice(args)
#define log_print(args...) LOG_LINE(_LOG_WARN, args)
#define log_print_bypass_report(args...) LOG_LINE(_LOG_WARN | _LOG_BYPASS_REPORT, args)
#define log_print_unless_silent(args...) LOG_LINE(silent_mode() ? _LOG_NOTICE : _LOG_WARN, args)
#define log_error(args...) log_err(args)
#define log_error_suppress(s, args...) log_err_suppress(s, args)

4
lib/log/lvm-logging.h
View File

@ -20,6 +20,10 @@ __attribute__ ((format(printf, 5, 6)))
void print_log(int level, const char *file, int line, int dm_errno_or_class,
const char *format, ...);
__attribute__ ((format(printf, 5, 6)))
void print_log_libdm(int level, const char *file, int line, int dm_errno_or_class,
const char *format, ...);
#define LOG_LINE(l, x...) \
print_log(l, __FILE__, __LINE__ , 0, ## x)

32
libdm/libdm-report.c
View File

@ -4175,7 +4175,7 @@ static int _report_headings(struct dm_report *rh)
/* print all headings */
heading = (char *) dm_pool_end_object(rh->mem);
log_print_bypass_report("%s", heading);
log_print("%s", heading);
dm_pool_free(rh->mem, (void *)heading);
dm_free(buf);
@ -4490,7 +4490,7 @@ static int _output_as_rows(struct dm_report *rh)
log_error("dm_report: Failed to terminate row");
goto bad;
}
log_print_bypass_report("%s", (char *) dm_pool_end_object(rh->mem));
log_print("%s", (char *) dm_pool_end_object(rh->mem));
}
_destroy_rows(rh);
@ -4583,7 +4583,7 @@ static int _output_as_columns(struct dm_report *rh)
}
line = (char *) dm_pool_end_object(rh->mem);
log_print_bypass_report("%*s", rh->group_item ? rh->group_item->group->indent + (int) strlen(line) : 0, line);
log_print("%*s", rh->group_item ? rh->group_item->group->indent + (int) strlen(line) : 0, line);
if (!(rh->flags & DM_REPORT_OUTPUT_MULTIPLE_TIMES))
dm_list_del(&row->list);
}
@ -4635,14 +4635,14 @@ static int _json_output_array_start(struct dm_pool *mem, struct report_group_ite
}
if (item->parent->store.finished_count > 0)
log_print_bypass_report("%*s", item->group->indent + (int) sizeof(JSON_SEPARATOR) - 1, JSON_SEPARATOR);
log_print("%*s", item->group->indent + (int) sizeof(JSON_SEPARATOR) - 1, JSON_SEPARATOR);
if (item->parent->parent && item->parent->data) {
log_print_bypass_report("%*s", item->group->indent + (int) sizeof(JSON_OBJECT_START) - 1, JSON_OBJECT_START);
log_print("%*s", item->group->indent + (int) sizeof(JSON_OBJECT_START) - 1, JSON_OBJECT_START);
item->group->indent += JSON_INDENT_UNIT;
}
log_print_bypass_report("%*s", item->group->indent + (int) strlen(output), output);
log_print("%*s", item->group->indent + (int) strlen(output), output);
item->group->indent += JSON_INDENT_UNIT;
dm_pool_free(mem, output);
@ -4691,9 +4691,9 @@ static int _print_basic_report_header(struct dm_report *rh)
memset(underline, '=', len);
if (rh->group_item->parent->store.finished_count > 0)
log_print_bypass_report("%s", "");
log_print_bypass_report("%s", report_name);
log_print_bypass_report("%s", underline);
log_print("%s", "");
log_print("%s", report_name);
log_print("%s", underline);
dm_pool_free(rh->mem, underline);
return 1;
@ -4759,7 +4759,7 @@ static int _report_group_create_basic(struct dm_report_group *group)
static int _report_group_create_json(struct dm_report_group *group)
{
log_print_bypass_report(JSON_OBJECT_START);
log_print(JSON_OBJECT_START);
group->indent += JSON_INDENT_UNIT;
return 1;
}
@ -4840,7 +4840,7 @@ static int _report_group_push_basic(struct report_group_item *item, const char *
item->report->flags &= ~(DM_REPORT_OUTPUT_MULTIPLE_TIMES);
} else {
if (!name && item->parent->store.finished_count > 0)
log_print_bypass_report("%s", "");
log_print("%s", "");
}
return 1;
@ -4868,8 +4868,8 @@ static int _report_group_push_json(struct report_group_item *item, const char *n
return 0;
}
if (item->parent->store.finished_count > 0)
log_print_bypass_report("%*s", item->group->indent + (int) sizeof(JSON_SEPARATOR) - 1, JSON_SEPARATOR);
log_print_bypass_report("%*s", item->group->indent + (int) sizeof(JSON_OBJECT_START) - 1, JSON_OBJECT_START);
log_print("%*s", item->group->indent + (int) sizeof(JSON_SEPARATOR) - 1, JSON_SEPARATOR);
log_print("%*s", item->group->indent + (int) sizeof(JSON_OBJECT_START) - 1, JSON_OBJECT_START);
item->group->indent += JSON_INDENT_UNIT;
}
@ -4948,11 +4948,11 @@ static int _report_group_pop_json(struct report_group_item *item)
if (item->output_done && item->needs_closing) {
if (item->data) {
item->group->indent -= JSON_INDENT_UNIT;
log_print_bypass_report("%*s", item->group->indent + (int) sizeof(JSON_ARRAY_END) - 1, JSON_ARRAY_END);
log_print("%*s", item->group->indent + (int) sizeof(JSON_ARRAY_END) - 1, JSON_ARRAY_END);
}
if (item->parent->data && item->parent->parent) {
item->group->indent -= JSON_INDENT_UNIT;
log_print_bypass_report("%*s", item->group->indent + (int) sizeof(JSON_OBJECT_END) - 1, JSON_OBJECT_END);
log_print("%*s", item->group->indent + (int) sizeof(JSON_OBJECT_END) - 1, JSON_OBJECT_END);
}
item->needs_closing = 0;
}
@ -5015,7 +5015,7 @@ static int _report_group_destroy_basic(void)
static int _report_group_destroy_json(void)
{
log_print_bypass_report(JSON_OBJECT_END);
log_print(JSON_OBJECT_END);
return 1;
}