X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=ovsdb%2Fexecution.c;h=027e9e18bb5c5ed455381031bcbee11945332f85;hb=fd76a6f94338b668175336434b156827458b5e7d;hp=416016fd9ef3ff89758d6c87bd51653f6e54f51a;hpb=1cb29ab050c601448a89eb7311a9f07095921bbd;p=sliver-openvswitch.git

diff --git a/ovsdb/execution.c b/ovsdb/execution.c
index 416016fd9..027e9e18b 100644
--- a/ovsdb/execution.c
+++ b/ovsdb/execution.c
@@ -1,4 +1,4 @@
-/* Copyright (c) 2009, 2010, 2011 Nicira Networks
+/* Copyright (c) 2009, 2010, 2011, 2012 Nicira, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -15,7 +15,6 @@
 
 #include <config.h>
 
-#include <assert.h>
 #include <limits.h>
 
 #include "column.h"
@@ -29,12 +28,14 @@
 #include "ovsdb.h"
 #include "query.h"
 #include "row.h"
+#include "server.h"
 #include "table.h"
 #include "timeval.h"
 #include "transaction.h"
 
 struct ovsdb_execution {
     struct ovsdb *db;
+    const struct ovsdb_session *session;
     struct ovsdb_txn *txn;
     struct ovsdb_symbol_table *symtab;
     bool durable;
@@ -57,6 +58,7 @@ static ovsdb_operation_executor ovsdb_execute_wait;
 static ovsdb_operation_executor ovsdb_execute_commit;
 static ovsdb_operation_executor ovsdb_execute_abort;
 static ovsdb_operation_executor ovsdb_execute_comment;
+static ovsdb_operation_executor ovsdb_execute_assert;
 
 static ovsdb_operation_executor *
 lookup_executor(const char *name)
@@ -76,6 +78,7 @@ lookup_executor(const char *name)
         { "commit", ovsdb_execute_commit },
         { "abort", ovsdb_execute_abort },
         { "comment", ovsdb_execute_comment },
+        { "assert", ovsdb_execute_assert },
     };
 
     size_t i;
@@ -90,7 +93,8 @@ lookup_executor(const char *name)
 }
 
 struct json *
-ovsdb_execute(struct ovsdb *db, const struct json *params,
+ovsdb_execute(struct ovsdb *db, const struct ovsdb_session *session,
+              const struct json *params,
               long long int elapsed_msec, long long int *timeout_msec)
 {
     struct ovsdb_execution x;
@@ -116,6 +120,7 @@ ovsdb_execute(struct ovsdb *db, const struct json *params,
     }
 
     x.db = db;
+    x.session = session;
     x.txn = ovsdb_txn_create(db);
     x.symtab = ovsdb_symbol_table_create();
     x.durable = false;
@@ -148,7 +153,7 @@ ovsdb_execute(struct ovsdb *db, const struct json *params,
                                          op_name);
             }
         } else {
-            assert(ovsdb_parser_has_error(&parser));
+            ovs_assert(ovsdb_parser_has_error(&parser));
         }
 
         /* A parse error overrides any other error.
@@ -428,6 +433,22 @@ ovsdb_execute_update(struct ovsdb_execution *x, struct ovsdb_parser *parser,
     if (!error) {
         error = parse_row(row_json, table, x->symtab, &row, &columns);
     }
+    if (!error) {
+        size_t i;
+
+        for (i = 0; i < columns.n_columns; i++) {
+            const struct ovsdb_column *column = columns.columns[i];
+
+            if (!column->mutable) {
+                error = ovsdb_syntax_error(parser->json,
+                                           "constraint violation",
+                                           "Cannot update immutable column %s "
+                                           "in table %s.",
+                                           column->name, table->schema->name);
+                break;
+            }
+        }
+    }
     if (!error) {
         error = ovsdb_condition_from_json(table->schema, where, x->symtab,
                                           &condition);
@@ -706,3 +727,28 @@ ovsdb_execute_comment(struct ovsdb_execution *x, struct ovsdb_parser *parser,
 
     return NULL;
 }
+
+static struct ovsdb_error *
+ovsdb_execute_assert(struct ovsdb_execution *x, struct ovsdb_parser *parser,
+                     struct json *result OVS_UNUSED)
+{
+    const struct json *lock_name;
+
+    lock_name = ovsdb_parser_member(parser, "lock", OP_ID);
+    if (!lock_name) {
+        return NULL;
+    }
+
+    if (x->session) {
+        const struct ovsdb_lock_waiter *waiter;
+
+        waiter = ovsdb_session_get_lock_waiter(x->session,
+                                               json_string(lock_name));
+        if (waiter && ovsdb_lock_waiter_is_owner(waiter)) {
+            return NULL;
+        }
+    }
+
+    return ovsdb_error("not owner", "Asserted lock %s not held.",
+                       json_string(lock_name));
+}