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staging: lustre: handle lnet_check_routes() errors

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After adding a route, lnet_check_routes() is called to ensure that
the route added doesn't invalidate the routing configuration.  If
lnet_check_routes() fails then the route just added, which caused the
current configuration to be invalidated is deleted, and an error
is returned to the user.

Signed-off-by: Amir Shehata <amir.shehata@intel.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-6218
Reviewed-on: http://review.whamcloud.com/13445
Reviewed-by: Liang Zhen <liang.zhen@intel.com>
Reviewed-by: Doug Oucharek <doug.s.oucharek@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Amir Shehata 2016-02-22 17:29:15 -05:00 committed by Greg Kroah-Hartman
parent 5af8a05e8f
commit 1ccde72626
1 changed files with 7 additions and 1 deletions
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8
drivers/staging/lustre/lnet/lnet/api-ni.c
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@ -1907,8 +1907,14 @@ LNetCtl(unsigned int cmd, void *arg)
config->cfg_config_u.cfg_route.rtr_hop,
config->cfg_nid,
config->cfg_config_u.cfg_route.rtr_priority);
if (!rc) {
rc = lnet_check_routes();
if (rc)
lnet_del_route(config->cfg_net,
config->cfg_nid);
}
mutex_unlock(&the_lnet.ln_api_mutex);
return rc ? rc : lnet_check_routes();
return rc;
case IOC_LIBCFS_DEL_ROUTE:
config = arg;