Implement 'reset rule' and 'reset rules' commands

Reset rule counters and quotas in kernel, i.e. without having to reload
them. Requires respective kernel patch to support NFT_MSG_GETRULE_RESET
message type.

Signed-off-by: Phil Sutter <phil@nwl.cc>

2 files changed, 199 insertions, 0 deletions

diff --git a/tests/shell/testcases/rule_management/0011reset_0 b/tests/shell/testcases/rule_management/0011reset_0
new file mode 100755
index 00000000..1a28b49f
--- /dev/null
+++ b/tests/shell/testcases/rule_management/0011reset_0
@@ -0,0 +1,168 @@
+#!/bin/sh
+
+set -e
+
+echo "loading ruleset"
+$NFT -f - <<EOF
+table ip t {
+	set s {
+		type ipv4_addr
+		counter
+		elements = { 1.1.1.1 counter packets 1 bytes 11 }
+	}
+	chain c {
+		counter packets 1 bytes 11 update @s { ip saddr } accept
+		counter packets 2 bytes 12 drop
+	}
+
+	chain c2 {
+		counter packets 3 bytes 13 accept
+		counter packets 4 bytes 14 drop
+	}
+}
+table inet t {
+	chain c {
+		counter packets 5 bytes 15 accept
+		counter packets 6 bytes 16 drop
+	}
+}
+table ip t2 {
+	chain c2 {
+		counter packets 7 bytes 17 accept
+		counter packets 8 bytes 18 drop
+	}
+}
+EOF
+
+echo "resetting specific rule"
+handle=$($NFT -a list chain t c | sed -n 's/.*accept # handle \([0-9]*\)$/\1/p')
+$NFT reset rule t c handle $handle
+EXPECT='table ip t {
+	set s {
+		type ipv4_addr
+		size 65535
+		flags dynamic
+		counter
+		elements = { 1.1.1.1 counter packets 1 bytes 11 }
+	}
+
+	chain c {
+		counter packets 0 bytes 0 update @s { ip saddr } accept
+		counter packets 2 bytes 12 drop
+	}
+
+	chain c2 {
+		counter packets 3 bytes 13 accept
+		counter packets 4 bytes 14 drop
+	}
+}
+table inet t {
+	chain c {
+		counter packets 5 bytes 15 accept
+		counter packets 6 bytes 16 drop
+	}
+}
+table ip t2 {
+	chain c2 {
+		counter packets 7 bytes 17 accept
+		counter packets 8 bytes 18 drop
+	}
+}'
+$DIFF -u <(echo "$EXPECT") <($NFT list ruleset)
+
+echo "resetting specific chain"
+EXPECT='table ip t {
+	set s {
+		type ipv4_addr
+		size 65535
+		flags dynamic
+		counter
+	}
+
+	chain c2 {
+		counter packets 3 bytes 13 accept
+		counter packets 4 bytes 14 drop
+	}
+}'
+$DIFF -u <(echo "$EXPECT") <($NFT reset rules chain t c2)
+
+echo "resetting specific table"
+EXPECT='table ip t {
+	set s {
+		type ipv4_addr
+		size 65535
+		flags dynamic
+		counter
+	}
+
+	chain c {
+		counter packets 0 bytes 0 update @s { ip saddr } accept
+		counter packets 2 bytes 12 drop
+	}
+
+	chain c2 {
+		counter packets 0 bytes 0 accept
+		counter packets 0 bytes 0 drop
+	}
+}'
+$DIFF -u <(echo "$EXPECT") <($NFT reset rules table t)
+
+echo "resetting specific family"
+EXPECT='table ip t {
+	set s {
+		type ipv4_addr
+		size 65535
+		flags dynamic
+		counter
+	}
+
+	chain c {
+		counter packets 0 bytes 0 update @s { ip saddr } accept
+		counter packets 0 bytes 0 drop
+	}
+
+	chain c2 {
+		counter packets 0 bytes 0 accept
+		counter packets 0 bytes 0 drop
+	}
+}
+table ip t2 {
+	chain c2 {
+		counter packets 7 bytes 17 accept
+		counter packets 8 bytes 18 drop
+	}
+}'
+$DIFF -u <(echo "$EXPECT") <($NFT reset rules ip)
+
+echo "resetting whole ruleset"
+EXPECT='table ip t {
+	set s {
+		type ipv4_addr
+		size 65535
+		flags dynamic
+		counter
+	}
+
+	chain c {
+		counter packets 0 bytes 0 update @s { ip saddr } accept
+		counter packets 0 bytes 0 drop
+	}
+
+	chain c2 {
+		counter packets 0 bytes 0 accept
+		counter packets 0 bytes 0 drop
+	}
+}
+table inet t {
+	chain c {
+		counter packets 5 bytes 15 accept
+		counter packets 6 bytes 16 drop
+	}
+}
+table ip t2 {
+	chain c2 {
+		counter packets 0 bytes 0 accept
+		counter packets 0 bytes 0 drop
+	}
+}'
+$DIFF -u <(echo "$EXPECT") <($NFT reset rules)
diff --git a/tests/shell/testcases/rule_management/dumps/0011reset_0.nft b/tests/shell/testcases/rule_management/dumps/0011reset_0.nft
new file mode 100644
index 00000000..3b4f5a11
--- /dev/null
+++ b/tests/shell/testcases/rule_management/dumps/0011reset_0.nft
@@ -0,0 +1,31 @@
+table ip t {
+	set s {
+		type ipv4_addr
+		size 65535
+		flags dynamic
+		counter
+		elements = { 1.1.1.1 counter packets 1 bytes 11 }
+	}
+
+	chain c {
+		counter packets 0 bytes 0 update @s { ip saddr } accept
+		counter packets 0 bytes 0 drop
+	}
+
+	chain c2 {
+		counter packets 0 bytes 0 accept
+		counter packets 0 bytes 0 drop
+	}
+}
+table inet t {
+	chain c {
+		counter packets 0 bytes 0 accept
+		counter packets 0 bytes 0 drop
+	}
+}
+table ip t2 {
+	chain c2 {
+		counter packets 0 bytes 0 accept
+		counter packets 0 bytes 0 drop
+	}
+}