From: Nathan Rutman <nathan.rutman@oracle.com>
Date: Thu, 17 Jun 2010 18:47:58 +0000 (-0700)
Subject: b=22656 Prevent failover nids from registering with MGS first.
X-Git-Tag: v1_8_3_54~2
X-Git-Url: https://git.whamcloud.com/?a=commitdiff_plain;h=229f8367ec4335a81143d2c14fd856a41dbfb652;p=fs%2Flustre-release.git

b=22656 Prevent failover nids from registering with MGS first.

Make the check in mgs_handle_target_reg()

o=Joseph Herring
i=nathan.rutman
i=andreas.dilger
---

diff --git a/lustre/mgs/mgs_handler.c b/lustre/mgs/mgs_handler.c
index 369d447..9d6392b 100644
--- a/lustre/mgs/mgs_handler.c
+++ b/lustre/mgs/mgs_handler.c
@@ -59,7 +59,7 @@
 #include <lustre_fsfilt.h>
 #include <lustre_disk.h>
 #include "mgs_internal.h"
-
+#include <lustre_param.h>
 
 /* Establish a connection to the MGS.*/
 static int mgs_connect(struct lustre_handle *conn, struct obd_device *obd,
@@ -367,6 +367,30 @@ static int mgs_check_target(struct obd_device *obd, struct mgs_target_info *mti)
         RETURN(rc);
 }
 
+/* Ensure this is not a failover node that is connecting first*/
+static int mgs_check_failover_reg(struct mgs_target_info *mti)
+{
+        lnet_nid_t nid;
+        char *ptr;
+        int i;
+
+        ptr = mti->mti_params;
+        while (class_find_param(ptr, PARAM_FAILNODE, &ptr) == 0) {
+                while (class_parse_nid(ptr, &nid, &ptr) == 0) {
+                        for (i = 0; i < mti->mti_nid_count; i++) {
+                                if (nid == mti->mti_nids[i]) {
+                                        LCONSOLE_WARN("Denying initial registra"
+                                                      "tion attempt from nid %s"
+                                                      ", specified as failover"
+                                                      "\n",libcfs_nid2str(nid));
+                                        return -EADDRNOTAVAIL;
+                                }
+                        }
+                }
+        }
+        return 0;
+}
+
 /* Called whenever a target starts up.  Flags indicate first connect, etc. */
 static int mgs_handle_target_reg(struct ptlrpc_request *req)
 {
@@ -393,6 +417,9 @@ static int mgs_handle_target_reg(struct ptlrpc_request *req)
                 if (rc <= 0)
                         /* Nothing wrong, or fatal error */
                         GOTO(out_nolock, rc);
+        } else {
+                if ((rc = mgs_check_failover_reg(mti)))
+                        GOTO(out_nolock, rc);
         }
 
         /* Revoke the config lock to make sure nobody is reading. */
diff --git a/lustre/tests/conf-sanity.sh b/lustre/tests/conf-sanity.sh
index cded53f..ef2ba73 100644
--- a/lustre/tests/conf-sanity.sh
+++ b/lustre/tests/conf-sanity.sh
@@ -2247,6 +2247,20 @@ test_56() {
 }
 run_test 56 "check big indexes"
 
+test_57() { # bug 22656
+	local NID=$($LCTL list_nids | head -1)
+	writeconf
+	do_facet ost1 "$TUNEFS --failnode=$NID `ostdevname 1`" || error "tunefs failed"
+	if ! combined_mgs_mds ; then
+		start_mgs
+	fi
+	start_mds
+	stop_mds
+	start_ost && error "OST registration from failnode should fail"
+	reformat
+}
+run_test 57 "initial registration from failnode should fail (should return errs)"
+
 if ! combined_mgs_mds ; then
 	stop mgs
 fi