backport of commit b546455 (#20868)

Co-authored-by: akshya96 <87045294+akshya96@users.noreply.github.com>

changelog/20783.txt

@@ -0,0 +1,3 @@
+```release-note:bug
+core: Fix writes to readonly storage on performance standbys when user lockout feature is enabled.
+```

vault/core.go

@@ -3529,18 +3529,19 @@ func (c *Core) runLockedUserEntryUpdatesForMountAccessor(ctx context.Context, mo
 		lockoutDurationFromConfiguration := userLockoutConfiguration.LockoutDuration
 
 		// get the entry for the locked user from userFailedLoginInfo map
-		failedLoginInfoFromMap := c.GetUserFailedLoginInfo(ctx, loginUserInfoKey)
+		failedLoginInfoFromMap := c.LocalGetUserFailedLoginInfo(ctx, loginUserInfoKey)
 
 		// check if the storage entry for locked user is stale
 		if time.Now().After(lastFailedLoginTimeFromStorageEntry.Add(lockoutDurationFromConfiguration)) {
 			// stale entry, remove from storage
+			// leaving this as it is as this happens on the active node
+			// also handles case where namespace is deleted
 			if err := c.barrier.Delete(ctx, path+alias); err != nil {
 				return 0, err
 			}
-
 			// remove entry for this user from userFailedLoginInfo map if present as the user is not locked
 			if failedLoginInfoFromMap != nil {
-				if err = c.UpdateUserFailedLoginInfo(ctx, loginUserInfoKey, nil, true); err != nil {
+				if err = updateUserFailedLoginInfo(ctx, c, loginUserInfoKey, nil, true); err != nil {
 					return 0, err
 				}
 			}
@@ -3557,7 +3558,7 @@ func (c *Core) runLockedUserEntryUpdatesForMountAccessor(ctx context.Context, mo
 
 		if failedLoginInfoFromMap != &actualFailedLoginInfo {
 			// entry is invalid, updating the entry in userFailedLoginMap with correct information
-			if err = c.UpdateUserFailedLoginInfo(ctx, loginUserInfoKey, &actualFailedLoginInfo, false); err != nil {
+			if err = updateUserFailedLoginInfo(ctx, c, loginUserInfoKey, &actualFailedLoginInfo, false); err != nil {
 				return 0, err
 			}
 		}

vault/core_test.go

@@ -479,7 +479,7 @@ func TestCore_RunLockedUserUpdatesForValidEntry(t *testing.T) {
 		mountAccessor: "mountAccessor1",
 	}
 
-	failedLoginInfoFromMap := core.GetUserFailedLoginInfo(context.Background(), loginUserInfoKey)
+	failedLoginInfoFromMap := core.LocalGetUserFailedLoginInfo(context.Background(), loginUserInfoKey)
 	if failedLoginInfoFromMap == nil {
 		t.Fatalf("err: entry must exist for locked user in userFailedLoginInfo map")
 	}