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Change path conflicts between log filters to be auto-corrected.

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This change makes it so when differing logging filters on the same
stream attempt to write to the same writer/path combination, the path
of the filter doing the later write will be automatically adjusted so
that it does not conflict with the other.  The path is adjusted by
appending "-N", where N is the smallest integer greater or equal to 2
required to resolve the path name conflict.

Addresses #842.
This commit is contained in:
Jon Siwek 2012-07-26 16:55:49 -05:00
parent 8633d91c40
commit 63e8bf72ed
7 changed files with 124 additions and 26 deletions
Download patch file Download diff file Expand all files Collapse all files

11
scripts/base/frameworks/logging/main.bro
View file

@ -96,6 +96,12 @@ export {
## file name. Generally, filenames are expected to given
## without any extensions; writers will add appropiate
## extensions automatically.
##
## If this path is found to conflict with another filter's
## for the same writer type, it is automatically corrected
## by appending "-N", where N is the smallest integer greater
## or equal to 2 that allows the corrected path name to not
## conflict with another filter's.
path: string &optional;
## A function returning the output path for recording entries
@ -115,7 +121,10 @@ export {
## rec: An instance of the streams's ``columns`` type with its
## fields set to the values to be logged.
##
## Returns: The path to be used for the filter.
## Returns: The path to be used for the filter, which will be subject
## to the same automatic correction rules as the *path*
## field of :bro:type:`Log::Filter` in the case of conflicts
## with other filters trying to use the same writer/path pair.
path_func: function(id: ID, path: string, rec: any): string &optional;
## Subset of column names to record. If not given, all

41
src/logging/Manager.cc
View file

@ -758,22 +758,43 @@ bool Manager::Write(EnumVal* id, RecordVal* columns)
#endif
}
Stream::WriterPathPair wpp(filter->writer->AsEnum(), path);
// See if we already have a writer for this path.
Stream::WriterMap::iterator w =
stream->writers.find(Stream::WriterPathPair(filter->writer->AsEnum(), path));
Stream::WriterMap::iterator w = stream->writers.find(wpp);
if ( w != stream->writers.end() &&
w->second->instantiating_filter != filter->name )
{
// Auto-correct path due to conflict with another filter over the
// same writer/path pair
string instantiator = w->second->instantiating_filter;
string new_path;
unsigned int i = 2;
do {
char num[32];
snprintf(num, sizeof(num), "-%u", i++);
new_path = path + num;
wpp.second = new_path;
w = stream->writers.find(wpp);
} while ( w != stream->writers.end());
Unref(filter->path_val);
filter->path_val = new StringVal(new_path.c_str());
reporter->Warning("Write using filter '%s' on path '%s' changed to"
" use new path '%s' to avoid conflict with filter '%s'",
filter->name.c_str(), path.c_str(), new_path.c_str(),
instantiator.c_str());
path = filter->path = filter->path_val->AsString()->CheckString();
}
WriterFrontend* writer = 0;
if ( w != stream->writers.end() )
{
if ( w->second->instantiating_filter != filter->name )
{
reporter->Warning("Skipping write to filter '%s' on path '%s'"
" because filter '%s' has already instantiated the same"
" writer type for that path", filter->name.c_str(),
filter->path.c_str(), w->second->instantiating_filter.c_str());
continue;
}
// We know this writer already.
writer = w->second->writer;
}

23
testing/btest/Baseline/scripts.base.frameworks.logging.writer-path-conflict/http-2-2.log Normal file
View file

@ -0,0 +1,23 @@
#separator \x09
#set_separator ,
#empty_field (empty)
#unset_field -
#path http-2-2
#start 2011-03-18-19-06-08
#fields status_code
#types count
304
304
304
304
304
304
304
304
304
304
304
304
304
304
#end 2011-03-18-19-06-13

23
testing/btest/Baseline/scripts.base.frameworks.logging.writer-path-conflict/http-2.log Normal file
View file

@ -0,0 +1,23 @@
#separator \x09
#set_separator ,
#empty_field (empty)
#unset_field -
#path http-2
#start 2011-03-18-19-06-08
#fields host
#types string
bits.wikimedia.org
upload.wikimedia.org
upload.wikimedia.org
upload.wikimedia.org
upload.wikimedia.org
upload.wikimedia.org
upload.wikimedia.org
meta.wikimedia.org
upload.wikimedia.org
upload.wikimedia.org
upload.wikimedia.org
upload.wikimedia.org
upload.wikimedia.org
upload.wikimedia.org
#end 2011-03-18-19-06-13

23
testing/btest/Baseline/scripts.base.frameworks.logging.writer-path-conflict/http-3.log Normal file
View file

@ -0,0 +1,23 @@
#separator \x09
#set_separator ,
#empty_field (empty)
#unset_field -
#path http-3
#start 2011-03-18-19-06-08
#fields uri
#types string
/skins-1.5/monobook/main.css
/wikipedia/commons/6/63/Wikipedia-logo.png
/wikipedia/commons/thumb/b/bb/Wikipedia_wordmark.svg/174px-Wikipedia_wordmark.svg.png
/wikipedia/commons/b/bd/Bookshelf-40x201_6.png
/wikipedia/commons/thumb/8/8a/Wikinews-logo.png/35px-Wikinews-logo.png
/wikipedia/commons/4/4a/Wiktionary-logo-en-35px.png
/wikipedia/commons/thumb/f/fa/Wikiquote-logo.svg/35px-Wikiquote-logo.svg.png
/images/wikimedia-button.png
/wikipedia/commons/thumb/f/fa/Wikibooks-logo.svg/35px-Wikibooks-logo.svg.png
/wikipedia/commons/thumb/d/df/Wikispecies-logo.svg/35px-Wikispecies-logo.svg.png
/wikipedia/commons/thumb/4/4c/Wikisource-logo.svg/35px-Wikisource-logo.svg.png
/wikipedia/commons/thumb/4/4a/Commons-logo.svg/35px-Commons-logo.svg.png
/wikipedia/commons/thumb/9/91/Wikiversity-logo.svg/35px-Wikiversity-logo.svg.png
/wikipedia/commons/thumb/7/75/Wikimedia_Community_Logo.svg/35px-Wikimedia_Community_Logo.svg.png
#end 2011-03-18-19-06-13

17
testing/btest/Baseline/scripts.base.frameworks.logging.writer-path-conflict/reporter.log
View file

@ -6,18 +6,7 @@
#start 2011-03-18-19-06-08
#fields ts level message location
#types time enum string string
1300475168.843894 Reporter::WARNING Skipping write to filter 'host-only' on path 'http' because filter 'default' has already instantiated the same writer type for that path (empty)
1300475168.975800 Reporter::WARNING Skipping write to filter 'host-only' on path 'http' because filter 'default' has already instantiated the same writer type for that path (empty)
1300475168.976327 Reporter::WARNING Skipping write to filter 'host-only' on path 'http' because filter 'default' has already instantiated the same writer type for that path (empty)
1300475168.979160 Reporter::WARNING Skipping write to filter 'host-only' on path 'http' because filter 'default' has already instantiated the same writer type for that path (empty)
1300475169.012666 Reporter::WARNING Skipping write to filter 'host-only' on path 'http' because filter 'default' has already instantiated the same writer type for that path (empty)
1300475169.012730 Reporter::WARNING Skipping write to filter 'host-only' on path 'http' because filter 'default' has already instantiated the same writer type for that path (empty)
1300475169.014860 Reporter::WARNING Skipping write to filter 'host-only' on path 'http' because filter 'default' has already instantiated the same writer type for that path (empty)
1300475169.022665 Reporter::WARNING Skipping write to filter 'host-only' on path 'http' because filter 'default' has already instantiated the same writer type for that path (empty)
1300475169.036294 Reporter::WARNING Skipping write to filter 'host-only' on path 'http' because filter 'default' has already instantiated the same writer type for that path (empty)
1300475169.036798 Reporter::WARNING Skipping write to filter 'host-only' on path 'http' because filter 'default' has already instantiated the same writer type for that path (empty)
1300475169.039923 Reporter::WARNING Skipping write to filter 'host-only' on path 'http' because filter 'default' has already instantiated the same writer type for that path (empty)
1300475169.074793 Reporter::WARNING Skipping write to filter 'host-only' on path 'http' because filter 'default' has already instantiated the same writer type for that path (empty)
1300475169.074938 Reporter::WARNING Skipping write to filter 'host-only' on path 'http' because filter 'default' has already instantiated the same writer type for that path (empty)
1300475169.075065 Reporter::WARNING Skipping write to filter 'host-only' on path 'http' because filter 'default' has already instantiated the same writer type for that path (empty)
1300475168.843894 Reporter::WARNING Write using filter 'host-only' on path 'http' changed to use new path 'http-2' to avoid conflict with filter 'default' (empty)
1300475168.843894 Reporter::WARNING Write using filter 'uri-only' on path 'http' changed to use new path 'http-3' to avoid conflict with filter 'default' (empty)
1300475168.843894 Reporter::WARNING Write using filter 'status-only' on path 'http-2' changed to use new path 'http-2-2' to avoid conflict with filter 'host-only' (empty)
#end 2011-03-18-19-06-13

12
testing/btest/scripts/base/frameworks/logging/writer-path-conflict.bro
View file

@ -1,6 +1,9 @@
# @TEST-EXEC: bro -C -r $TRACES/wikipedia.trace %INPUT
# @TEST-EXEC: btest-diff reporter.log
# @TEST-EXEC: btest-diff http.log
# @TEST-EXEC: btest-diff http-2.log
# @TEST-EXEC: btest-diff http-3.log
# @TEST-EXEC: btest-diff http-2-2.log
@load base/protocols/http
@ -8,7 +11,14 @@ event bro_init()
{
# Both the default filter for the http stream and this new one will
# attempt to have the same writer write to path "http", which will
# be reported as a warning and the write skipped.
# be reported as a warning and the path auto-corrected to "http-2"
local filter: Log::Filter = [$name="host-only", $include=set("host")];
# Same deal here, but should be auto-corrected to "http-3".
local filter2: Log::Filter = [$name="uri-only", $include=set("uri")];
# Conflict between auto-correct paths needs to be corrected, too, this
# time it will be "http-2-2".
local filter3: Log::Filter = [$path="http-2", $name="status-only", $include=set("status_code")];
Log::add_filter(HTTP::LOG, filter);
Log::add_filter(HTTP::LOG, filter2);
Log::add_filter(HTTP::LOG, filter3);
}