[OE-core] [V2 PATCH] dhcp: fix shutdown not work by SIGTERM while bind9 enable threads
Hongxu Jia
hongxu.jia at windriver.com
Wed Jul 12 07:27:48 UTC 2017
In https://source.isc.org/git/bind9.git, since the following
commit applied:
...
commit b99bfa184bc9375421b5df915eea7dfac6a68a99
Author: Evan Hunt <each at isc.org>
Date: Wed Apr 10 13:49:57 2013 -0700
[master] unify internal and export libraries
3550. [func] Unified the internal and export versions of the
BIND libraries, allowing external clients to use
the same libraries as BIND. [RT #33131]
...
(git show b99bfa184bc9375421b5df915eea7dfac6a68a99 -- ./lib/isc/unix/app.c)
In this commit, if bind9 enable threads(ISC_PLATFORM_USETHREADS),
it blocks signal SIGHUP, SIGINT and SIGTERM in isc__app_ctxstart.
Which caused dhclient/dhcpd could not be stopped by SIGTERM.
It caused systemd's reboot hung which send SIGTERM by default.
Signed-off-by: Hongxu Jia <hongxu.jia at windriver.com>
---
...all-to-isc_app_ctxstart-to-not-get-signal.patch | 81 ++++++++++++++++++++++
meta/recipes-connectivity/dhcp/dhcp_4.3.5.bb | 1 +
2 files changed, 82 insertions(+)
create mode 100644 meta/recipes-connectivity/dhcp/dhcp/Moved-the-call-to-isc_app_ctxstart-to-not-get-signal.patch
diff --git a/meta/recipes-connectivity/dhcp/dhcp/Moved-the-call-to-isc_app_ctxstart-to-not-get-signal.patch b/meta/recipes-connectivity/dhcp/dhcp/Moved-the-call-to-isc_app_ctxstart-to-not-get-signal.patch
new file mode 100644
index 0000000..9b43f96
--- /dev/null
+++ b/meta/recipes-connectivity/dhcp/dhcp/Moved-the-call-to-isc_app_ctxstart-to-not-get-signal.patch
@@ -0,0 +1,81 @@
+From e8c30bac53f8baeb80f87b445f42259cc8984fb5 Mon Sep 17 00:00:00 2001
+From: Hongxu Jia <hongxu.jia at windriver.com>
+Date: Wed, 12 Jul 2017 03:05:13 -0400
+Subject: [PATCH] Moved the call to isc_app_ctxstart() to not get signal block
+ by all threads
+
+Signed-off-by: Francis Dupont <fdupont at isc.org>
+
+In https://source.isc.org/git/bind9.git, since the following
+commit applied:
+...
+commit b99bfa184bc9375421b5df915eea7dfac6a68a99
+Author: Evan Hunt <each at isc.org>
+Date: Wed Apr 10 13:49:57 2013 -0700
+
+ [master] unify internal and export libraries
+
+ 3550. [func] Unified the internal and export versions of the
+ BIND libraries, allowing external clients to use
+ the same libraries as BIND. [RT #33131]
+...
+(git show b99bfa184bc9375421b5df915eea7dfac6a68a99 -- ./lib/isc/unix/app.c)
+
+In this commit, if bind9 enable threads(ISC_PLATFORM_USETHREADS),
+it blocks signal SIGHUP, SIGINT and SIGTERM in isc__app_ctxstart.
+Which caused dhclient/dhcpd could not be stopped by SIGTERM.
+
+It caused systemd's reboot hung which send SIGTERM by default.
+
+Upstream-Status: Backport [https://source.isc.org/git/dhcp.git]
+Signed-off-by: Hongxu Jia <hongxu.jia at windriver.com>
+---
+ omapip/isclib.c | 25 +++++++++++++++----------
+ 1 file changed, 15 insertions(+), 10 deletions(-)
+
+diff --git a/omapip/isclib.c b/omapip/isclib.c
+index 13f0d3e..4af04b6 100644
+--- a/omapip/isclib.c
++++ b/omapip/isclib.c
+@@ -185,16 +185,6 @@ dhcp_context_create(int flags,
+ if (result != ISC_R_SUCCESS)
+ goto cleanup;
+
+- result = isc_app_ctxstart(dhcp_gbl_ctx.actx);
+- if (result != ISC_R_SUCCESS)
+- return (result);
+- dhcp_gbl_ctx.actx_started = ISC_TRUE;
+-
+- /* Not all OSs support suppressing SIGPIPE through socket
+- * options, so set the sigal action to be ignore. This allows
+- * broken connections to fail gracefully with EPIPE on writes */
+- handle_signal(SIGPIPE, SIG_IGN);
+-
+ result = isc_taskmgr_createinctx(dhcp_gbl_ctx.mctx,
+ dhcp_gbl_ctx.actx,
+ 1, 0,
+@@ -217,6 +207,21 @@ dhcp_context_create(int flags,
+ result = isc_task_create(dhcp_gbl_ctx.taskmgr, 0, &dhcp_gbl_ctx.task);
+ if (result != ISC_R_SUCCESS)
+ goto cleanup;
++
++ result = isc_app_ctxstart(dhcp_gbl_ctx.actx);
++ if (result != ISC_R_SUCCESS)
++ return (result);
++ dhcp_gbl_ctx.actx_started = ISC_TRUE;
++
++ /* Not all OSs support suppressing SIGPIPE through socket
++ * options, so set the sigal action to be ignore. This allows
++ * broken connections to fail gracefully with EPIPE on writes */
++ handle_signal(SIGPIPE, SIG_IGN);
++
++ /* Reset handlers installed by isc_app_ctxstart()
++ * to default for control-c and kill */
++ handle_signal(SIGINT, SIG_DFL);
++ handle_signal(SIGTERM, SIG_DFL);
+ }
+
+ #if defined (NSUPDATE)
+--
+2.8.1
+
diff --git a/meta/recipes-connectivity/dhcp/dhcp_4.3.5.bb b/meta/recipes-connectivity/dhcp/dhcp_4.3.5.bb
index 0a73ecc..964d05dd 100644
--- a/meta/recipes-connectivity/dhcp/dhcp_4.3.5.bb
+++ b/meta/recipes-connectivity/dhcp/dhcp_4.3.5.bb
@@ -10,6 +10,7 @@ SRC_URI += "file://dhcp-3.0.3-dhclient-dbus.patch;striplevel=0 \
file://tweak-to-support-external-bind.patch \
file://remove-dhclient-script-bash-dependency.patch \
file://build-shared-libs.patch \
+ file://Moved-the-call-to-isc_app_ctxstart-to-not-get-signal.patch \
"
SRC_URI[md5sum] = "2b5e5b2fa31c2e27e487039d86f83d3f"
--
2.8.1
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