[teamd] do not process lacpdu before the port ifinfo is set (#2815)

Port libteam patch which fixes the race condition we observed during
warm reboot.

Remove early patches: 0006, 0008, 0009.

Signed-off-by: Ying Xie <ying.xie@microsoft.com>

src/libteam/0006-Fix-ifinfo_link_with_port-race-condition-with-newlink.patch

@@ -1,45 +0,0 @@
-From 9a27e9b85afbbf6235e61c2426481e49a2139219 Mon Sep 17 00:00:00 2001
-From: Shu0T1an ChenG <shuche@microsoft.com>
-Date: Tue, 15 Jan 2019 12:23:02 -0800
-Subject: [PATCH] Fix ifinfo_link_with_port race condition with newlink
-
-The race condition could happen like this:
-When an interface is enslaved into the port channel immediately after
-it is created, the order of creating the ifinfo and linking the ifinfo to
-the port is not guaranteed.
-
-The team handler will listen to both netlink message to track new links
-get created to allocate the ifinfo and add the ifinfo into its linked list,
-and the team port change message to link the new port with ifinfo found
-in its linkedin list. However, when the ifinfo is not yet created, the error
-message "Failed to link port with ifinfo" is thrown with member port failed
-to be added into the team handler's port list.
-
-This fix adds a condition to check if ifinfo_link_with_port is linking ifinfo
-to a port or to the team interface itself. If it is a port, ifinfo_find_create
-function is used to fix the race condition.
-
-Signed-off-by: Shu0T1an ChenG <shuche@microsoft.com>
----
- libteam/ifinfo.c | 5 ++++-
- 1 file changed, 4 insertions(+), 1 deletion(-)
-
-diff --git a/libteam/ifinfo.c b/libteam/ifinfo.c
-index 44de4ca..444e0cd 100644
---- a/libteam/ifinfo.c
-+++ b/libteam/ifinfo.c
-@@ -429,7 +429,10 @@ int ifinfo_link_with_port(struct team_handle *th, uint32_t ifindex,
- {
- 	struct team_ifinfo *ifinfo;
- 
--	ifinfo = ifinfo_find(th, ifindex);
-+	if (port)
-+		ifinfo = ifinfo_find_create(th, ifindex);
-+	else
-+		ifinfo = ifinfo_find(th, ifindex);
- 	if (!ifinfo)
- 		return -ENOENT;
- 	if (ifinfo->linked)
--- 
-2.1.4
-

src/libteam/0008-teamd-register-change-handler-for-TEAM_IFINFO_CHANGE.patch

@@ -1,34 +0,0 @@
-From 7dff9798c2c92eb75b0120737efb81febcdb80c1 Mon Sep 17 00:00:00 2001
-From: Ying Xie <ying.xie@microsoft.com>
-Date: Sun, 24 Mar 2019 21:49:59 +0000
-Subject: [PATCH] [teamd] register change handler for TEAM_IFINFO_CHANGE as
- well
-
-There has been a race condition in the libnal/teamd interation, causing
-TEAM_PORT_CHANGE to report a port with empty device name. Which then
-causes the teamd unable to add the lag members into the lag.
-
-Registering to the TEAM_IFINFO_CHANGE would give teamd another chance to
-add member again.
-
-Signed-off-by: Ying Xie <ying.xie@microsoft.com>
----
- teamd/teamd_per_port.c | 2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
-
-diff --git a/teamd/teamd_per_port.c b/teamd/teamd_per_port.c
-index 09d1dc7..137da57 100644
---- a/teamd/teamd_per_port.c
-+++ b/teamd/teamd_per_port.c
-@@ -274,7 +274,7 @@ static int port_priv_change_handler_func(struct team_handle *th, void *priv,
- 
- static const struct team_change_handler port_priv_change_handler = {
- 	.func = port_priv_change_handler_func,
--	.type_mask = TEAM_PORT_CHANGE,
-+	.type_mask = TEAM_PORT_CHANGE | TEAM_IFINFO_CHANGE,
- };
- 
- int teamd_per_port_init(struct teamd_context *ctx)
--- 
-2.7.4
-

src/libteam/0009-teamd-prevent-private-change-handler-reentrance.patch

@@ -1,90 +0,0 @@
-From fb00b070482dc587eec7b4e34acec094be1af00d Mon Sep 17 00:00:00 2001
-From: Ying Xie <ying.xie@microsoft.com>
-Date: Fri, 29 Mar 2019 20:54:49 +0000
-Subject: [PATCH 10/11] [teamd] prevent private change handler reentrance
-
-While handling PORT_CHANGE, teamd could casue an INTERFACE_CHANGE in the
-same context. Which will interfere with the PORT_CHANGE handling and
-causing it to fail.
-
-Lock is not needed because the re-entrance happened in the same thread
-context.
-
-This issue was noticed while dynamically adding a port into a lag.
-
-Signed-off-by: Ying Xie <ying.xie@microsoft.com>
----
- teamd/teamd.c          |  2 ++
- teamd/teamd.h          |  2 ++
- teamd/teamd_per_port.c | 13 +++++++++++--
- 3 files changed, 15 insertions(+), 2 deletions(-)
-
-diff --git a/teamd/teamd.c b/teamd/teamd.c
-index e28aa7d..140b98b 100644
---- a/teamd/teamd.c
-+++ b/teamd/teamd.c
-@@ -1255,6 +1255,8 @@ static int teamd_init(struct teamd_context *ctx)
- {
- 	int err;
- 
-+	ctx->reentrant = false;
-+
- 	ctx->th = team_alloc();
- 	if (!ctx->th) {
- 		teamd_log_err("Team alloc failed.");
-diff --git a/teamd/teamd.h b/teamd/teamd.h
-index 622c365..7cd3266 100644
---- a/teamd/teamd.h
-+++ b/teamd/teamd.h
-@@ -160,6 +160,8 @@ struct teamd_context {
- 		int			pipe_r;
- 		int			pipe_w;
- 	} workq;
-+
-+	bool reentrant;
- };
- 
- struct teamd_port {
-diff --git a/teamd/teamd_per_port.c b/teamd/teamd_per_port.c
-index 137da57..8b4a457 100644
---- a/teamd/teamd_per_port.c
-+++ b/teamd/teamd_per_port.c
-@@ -250,6 +250,10 @@ static int port_priv_change_handler_func(struct team_handle *th, void *priv,
- 	struct port_obj *port_obj;
- 	int err;
- 
-+	if (ctx->reentrant) {
-+		return 0;
-+	}
-+	ctx->reentrant = true;
- 	team_for_each_port(port, th) {
- 		uint32_t ifindex = team_get_port_ifindex(port);
- 
-@@ -258,17 +262,22 @@ static int port_priv_change_handler_func(struct team_handle *th, void *priv,
- 			if (team_is_port_removed(port))
- 				continue;
- 			err = port_obj_create(ctx, &port_obj, ifindex, port);
--			if (err)
-+			if (err) {
-+				ctx->reentrant = false;
- 				return err;
-+			}
- 		}
- 		if (team_is_port_changed(port)) {
- 			err = teamd_event_port_changed(ctx, _port(port_obj));
--			if (err)
-+			if (err) {
-+				ctx->reentrant = false;
- 				return err;
-+			}
- 		}
- 		if (team_is_port_removed(port))
- 			port_obj_remove(ctx, port_obj);
- 	}
-+	ctx->reentrant = false;
- 	return 0;
- }
- 
--- 
-2.7.4
-

src/libteam/0012-teamd-do-not-process-lacpdu-before-the-port-ifinfo-i.patch

@@ -0,0 +1,46 @@
+From 28ccb37eb388e7e3d214a9b05011f8421f0d65ac Mon Sep 17 00:00:00 2001
+From: Ying Xie <ying.xie@microsoft.com>
+Date: Fri, 26 Apr 2019 23:30:38 +0000
+Subject: [PATCH] teamd: do not process lacpdu before the port ifinfo is set
+
+Now the port ifinfo will be set in obj_input_newlink when a RTM_NEWLINK
+event is received.
+
+But when a port is being added, if a lacpdu gets received on this port
+before the RTM_NEWLINK event, lacpdu_recv will process the packet with
+incorrect port ifinfo.
+
+In Patrick's case, as ifinfo->master_ifindex was 0, it would skip this
+port in teamd_for_each_tdport, which caused lacp_port->agg_lead not to
+be updated in lacp_switch_agg_lead. Later the lacp_port actor would go
+to a unexpected state.
+
+This patch is to avoid it by checking teamd_port_present in lacpdu_recv
+so that it would not process lacpdu before the port ifinfo is set.
+
+Reported-by: Patrick Talbert <ptalbert@redhat.com>
+Tested-by: Patrick Talbert <ptalbert@redhat.com>
+Signed-off-by: Xin Long <lucien.xin@gmail.com>
+Reviewed-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
+Signed-off-by: Jiri Pirko <jiri@mellanox.com>
+---
+ teamd/teamd_runner_lacp.c | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/teamd/teamd_runner_lacp.c b/teamd/teamd_runner_lacp.c
+index 78f05dd..c8ae541 100644
+--- a/teamd/teamd_runner_lacp.c
++++ b/teamd/teamd_runner_lacp.c
+@@ -1132,6 +1132,9 @@ static int lacpdu_process(struct lacp_port *lacp_port, struct lacpdu* lacpdu)
+ {
+ 	int err;
+ 
++	if (!teamd_port_present(lacp_port->ctx, lacp_port->tdport))
++		return 0;
++
+ 	if (!lacpdu_check(lacpdu)) {
+ 		teamd_log_warn("malformed LACP PDU came.");
+ 		return 0;
+-- 
+2.7.4
+

src/libteam/series

@@ -3,9 +3,7 @@
 0003-teamd-lacp-runner-will-send-lacp-update-right-after-.patch
 0004-libteam-Add-lacp-fallback-support-for-single-member-.patch
 0005-libteam-Add-warm_reboot-mode.patch
-0006-Fix-ifinfo_link_with_port-race-condition-with-newlink.patch
 0007-Skip-setting-the-same-hwaddr-to-lag-port-to-avoid-di.patch
-0008-teamd-register-change-handler-for-TEAM_IFINFO_CHANGE.patch
-0009-teamd-prevent-private-change-handler-reentrance.patch
 0010-teamd-lacp-update-port-state-according-to-partners-sy.patch
-0011-libteam-resynchronize-ifinfo-after-lost-RTNLGRP_LINK-.patch
+0011-libteam-resynchronize-ifinfo-after-lost-RTNLGRP_LINK-.patch
+0012-teamd-do-not-process-lacpdu-before-the-port-ifinfo-i.patch