Changeset ae78b53 in mainline for uspace/srv/vfs/vfs_ops.c

Timestamp:

2008-01-19T13:40:38Z (16 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

4bb31f7

Parents:

5973fd0

Message:

Introduce the notion of lflag (i.e. lookup flags) to support the ability to
limit the scope of VFS node types that can be opened by open() and opendir(). In
the future, lflag will also specify actions for VFS_LOOKUP handlers that will be
carried out in situations such as the VFS node is not found (e.g. implementation
of mkdir() and open() with O_CREAT in oflag).

File:

• uspace/srv/vfs/vfs_ops.c (modified) (4 diffs)

uspace/srv/vfs/vfs_ops.c

@@ -72 +72 @@
         };
 
-        return vfs_lookup_internal("/", strlen("/"), result, &altroot);
+        return vfs_lookup_internal("/", strlen("/"), L_DIRECTORY, result,
+            &altroot);
 }
 
@@ -196 +197 @@
                  */
                 rwlock_write_lock(&namespace_rwlock);
-                rc = vfs_lookup_internal(buf, size, &mp_res, NULL);
+                rc = vfs_lookup_internal(buf, size, L_DIRECTORY, &mp_res,
+                    NULL);
                 if (rc != EOK) {
                         /*
@@ -298 +300 @@
 
         /*
-         * The POSIX interface is open(path, flags, mode).
-         * We can receive flags and mode along with the VFS_OPEN call; the path
+         * The POSIX interface is open(path, oflag, mode).
+         * We can receive oflags and mode along with the VFS_OPEN call; the path
          * will need to arrive in another call.
-         */
-        int flags = IPC_GET_ARG1(*request);
-        int mode = IPC_GET_ARG2(*request);
+         *
+         * We also receive one private, non-POSIX set of flags called lflag
+         * used to pass information to vfs_lookup_internal().
+         */
+        int lflag = IPC_GET_ARG1(*request);
+        int oflag = IPC_GET_ARG2(*request);
+        int mode = IPC_GET_ARG3(*request);
         size_t len;
 
@@ -346 +352 @@
          */
         vfs_lookup_res_t lr;
-        rc = vfs_lookup_internal(path, len, &lr, NULL);
+        rc = vfs_lookup_internal(path, len, lflag, &lr, NULL);
         if (rc) {
                 rwlock_read_unlock(&namespace_rwlock);