From 5a735f26b0c6617b2851a7399c8ad118e89deba8 Mon Sep 17 00:00:00 2001 From: Phil Sutter Date: Mon, 12 Jul 2021 16:34:38 +0200 Subject: [PATCH] doc: nft.8: Extend monitor description by trace Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1820365 Upstream Status: nftables commit 2acf8b2caea19 commit 2acf8b2caea19d8abd46d475a908f8d6afb33aa0 Author: Phil Sutter Date: Wed May 19 13:12:48 2021 +0200 doc: nft.8: Extend monitor description by trace Briefly describe 'nft monitor trace' command functionality. Signed-off-by: Phil Sutter --- doc/nft.txt | 25 ++++++++++++++++++++++--- 1 file changed, 22 insertions(+), 3 deletions(-) diff --git a/doc/nft.txt b/doc/nft.txt index abb9260..9cc35ee 100644 --- a/doc/nft.txt +++ b/doc/nft.txt @@ -734,13 +734,26 @@ These are some additional commands included in nft. MONITOR ~~~~~~~~ The monitor command allows you to listen to Netlink events produced by the -nf_tables subsystem, related to creation and deletion of objects. When they +nf_tables subsystem. These are either related to creation and deletion of +objects or to packets for which *meta nftrace* was enabled. When they occur, nft will print to stdout the monitored events in either JSON or native nft format. + -To filter events related to a concrete object, use one of the keywords 'tables', 'chains', 'sets', 'rules', 'elements', 'ruleset'. + +[verse] +____ +*monitor* [*new* | *destroy*] 'MONITOR_OBJECT' +*monitor* *trace* + +'MONITOR_OBJECT' := *tables* | *chains* | *sets* | *rules* | *elements* | *ruleset* +____ + +To filter events related to a concrete object, use one of the keywords in +'MONITOR_OBJECT'. -To filter events related to a concrete action, use keyword 'new' or 'destroy'. +To filter events related to a concrete action, use keyword *new* or *destroy*. + +The second form of invocation takes no further options and exclusively prints +events generated for packets with *nftrace* enabled. Hit ^C to finish the monitor operation. @@ -764,6 +777,12 @@ Hit ^C to finish the monitor operation. % nft monitor ruleset --------------------- +.Trace incoming packets from host 10.0.0.1 +------------------------------------------ +% nft add rule filter input ip saddr 10.0.0.1 meta nftrace set 1 +% nft monitor trace +------------------------------------------ + ERROR REPORTING --------------- When an error is detected, nft shows the line(s) containing the error, the -- 2.31.1