Changeset fc2e71e in mainline for uspace/srv/fs/tmpfs/tmpfs_ops.c

Timestamp:

2010-01-31T20:53:42Z (15 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

c16013b

Parents:

1735f3e

Message:

Forbid mounting the same TMPFS instance multiple times.

File:

• uspace/srv/fs/tmpfs/tmpfs_ops.c (modified) (3 diffs)

uspace/srv/fs/tmpfs/tmpfs_ops.c

@@ -439 +439 @@
 {
         dev_handle_t dev_handle = (dev_handle_t) IPC_GET_ARG1(*request);
+        fs_node_t *rootfn;
         int rc;
 
@@ -463 +464 @@
         opts[size] = '\0';
 
+        /*
+         * Check if this device is not already mounted.
+         */
+        rc = tmpfs_root_get(&rootfn, dev_handle);
+        if ((rc == EOK) && (rootfn)) {
+                (void) tmpfs_node_put(&rootfn);
+                free(opts);
+                ipc_answer_0(rid, EEXIST);
+                return;
+        }
+
         /* Initialize TMPFS instance. */
         if (!tmpfs_instance_init(dev_handle)) {
@@ -470 +482 @@
         }
 
-        fs_node_t *rootfn;
         rc = tmpfs_root_get(&rootfn, dev_handle);
         assert(rc == EOK);