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From ed7875afc4ab7e8441eb70f346c774dd49ddfd9b Mon Sep 17 00:00:00 2001
From: Justin Stephenson <jstephen@redhat.com>
Date: Fri, 26 Aug 2016 17:43:25 -0400
Subject: [PATCH 50/79] MONITOR: Add disable_netlink option
Adding a new monitor boolean option to disable netlink support.
This will give users more control over sssd state changes without
having to modify systemd unit files.
Resolves:
https://fedorahosted.org/sssd/ticket/3142
Reviewed-by: Petr Cech <pcech@redhat.com>
Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>
(cherry picked from commit 081c6d8c7c8e75487d1c4e42862964be1e85b575)
---
src/confdb/confdb.h | 1 +
src/config/SSSDConfig/__init__.py.in | 1 +
src/config/SSSDConfigTest.py | 3 ++-
src/config/cfg_rules.ini | 1 +
src/config/etc/sssd.api.conf | 1 +
src/man/sssd.conf.5.xml | 18 ++++++++++++++++++
src/monitor/monitor.c | 21 ++++++++++++++++++---
7 files changed, 42 insertions(+), 4 deletions(-)
diff --git a/src/confdb/confdb.h b/src/confdb/confdb.h
index 401e5fbf7ed6bb9e8d7158dfab378c8159aa03db..2d650900170d5f2214aa56f00fc749980e53f516 100644
--- a/src/confdb/confdb.h
+++ b/src/confdb/confdb.h
@@ -73,6 +73,7 @@
#define CONFDB_MONITOR_OVERRIDE_SPACE "override_space"
#define CONFDB_MONITOR_USER_RUNAS "user"
#define CONFDB_MONITOR_CERT_VERIFICATION "certificate_verification"
+#define CONFDB_MONITOR_DISABLE_NETLINK "disable_netlink"
/* Both monitor and domains */
#define CONFDB_NAME_REGEX "re_expression"
diff --git a/src/config/SSSDConfig/__init__.py.in b/src/config/SSSDConfig/__init__.py.in
index 0191920f93ab9016508e08785c25dd043c180c0b..2027028f7b4e972c7bc0dd5156fd85157ae192f4 100644
--- a/src/config/SSSDConfig/__init__.py.in
+++ b/src/config/SSSDConfig/__init__.py.in
@@ -62,6 +62,7 @@ option_strings = {
'user' : _('The user to drop privileges to'),
'certificate_verification' : _('Tune certificate verification'),
'override_space': _('All spaces in group or user names will be replaced with this character'),
+ 'disable_netlink' : _('Tune sssd to honor or ignore netlink state changes'),
# [nss]
'enum_cache_timeout' : _('Enumeration cache timeout length (seconds)'),
diff --git a/src/config/SSSDConfigTest.py b/src/config/SSSDConfigTest.py
index 6a0fdf0ea5215103b48dc8521a43ae945342c0e2..8a64a257ab978b81ae4b26918c683b25a30fe7c1 100755
--- a/src/config/SSSDConfigTest.py
+++ b/src/config/SSSDConfigTest.py
@@ -310,7 +310,8 @@ class SSSDConfigTestSSSDService(unittest.TestCase):
'client_idle_timeout',
'description',
'certificate_verification',
- 'override_space']
+ 'override_space',
+ 'disable_netlink']
self.assertTrue(type(options) == dict,
"Options should be a dictionary")
diff --git a/src/config/cfg_rules.ini b/src/config/cfg_rules.ini
index 5e248066bd554d2a654a764f406f6b33c4d66733..93c10e2b7892027f0ee7a7af096814fb7cac333a 100644
--- a/src/config/cfg_rules.ini
+++ b/src/config/cfg_rules.ini
@@ -38,6 +38,7 @@ option = default_domain_suffix
option = certificate_verification
option = override_space
option = config_file_version
+option = disable_netlink
[rule/allowed_nss_options]
validator = ini_allowed_options
diff --git a/src/config/etc/sssd.api.conf b/src/config/etc/sssd.api.conf
index 525f939cd204f4d484caa7b490d85b0d50de00ef..9e4bf2f6e5d536099af75a82126bc577e10386b4 100644
--- a/src/config/etc/sssd.api.conf
+++ b/src/config/etc/sssd.api.conf
@@ -28,6 +28,7 @@ user = str, None, false
default_domain_suffix = str, None, false
certificate_verification = str, None, false
override_space = str, None, false
+disable_netlink = bool, None, false
[nss]
# Name service
diff --git a/src/man/sssd.conf.5.xml b/src/man/sssd.conf.5.xml
index ae291e0fc8f2f9afabcdf32f18a5ec12252bbbbf..6f231b8ab8fc078d83331bb7ef5b980528a30bd6 100644
--- a/src/man/sssd.conf.5.xml
+++ b/src/man/sssd.conf.5.xml
@@ -482,6 +482,24 @@
</para>
</listitem>
</varlistentry>
+ <varlistentry>
+ <term>disable_netlink (boolean)</term>
+ <listitem>
+ <para>
+ SSSD hooks into the netlink interface to
+ monitor changes to routes, addresses, links
+ and trigger certain actions.
+ </para>
+ <para>
+ The SSSD state changes caused by netlink
+ events may be undesirable and can be disabled
+ by setting this option to 'true'
+ </para>
+ <para>
+ Default: false (netlink changes are detected)
+ </para>
+ </listitem>
+ </varlistentry>
</variablelist>
</para>
</refsect2>
diff --git a/src/monitor/monitor.c b/src/monitor/monitor.c
index 442bdbc423aaa1224d17b9f357193ec73b045d29..84a144e56294c7af5d818b71fbe3664cd2fc1a94 100644
--- a/src/monitor/monitor.c
+++ b/src/monitor/monitor.c
@@ -2052,6 +2052,7 @@ static int monitor_process_init(struct mt_ctx *ctx,
int num_providers;
int ret;
int error;
+ bool disable_netlink;
struct sysdb_upgrade_ctx db_up_ctx;
/* Set up the environment variable for the Kerberos Replay Cache */
@@ -2172,14 +2173,28 @@ static int monitor_process_init(struct mt_ctx *ctx,
return ret;
}
- ret = setup_netlink(ctx, ctx->ev, network_status_change_cb,
- ctx, &ctx->nlctx);
+ ret = confdb_get_bool(ctx->cdb,
+ CONFDB_MONITOR_CONF_ENTRY,
+ CONFDB_MONITOR_DISABLE_NETLINK,
+ false, &disable_netlink);
+
if (ret != EOK) {
DEBUG(SSSDBG_OP_FAILURE,
- "Cannot set up listening for network notifications\n");
+ "Failed to read disable_netlink from confdb: [%d] %s\n",
+ ret, sss_strerror(ret));
return ret;
}
+ if (disable_netlink == false) {
+ ret = setup_netlink(ctx, ctx->ev, network_status_change_cb,
+ ctx, &ctx->nlctx);
+ if (ret != EOK) {
+ DEBUG(SSSDBG_OP_FAILURE,
+ "Cannot set up listening for network notifications\n");
+ return ret;
+ }
+ }
+
/* start providers */
num_providers = 0;
for (dom = ctx->domains; dom; dom = get_next_domain(dom, 0)) {
--
2.9.3
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