diff options
Diffstat (limited to 'cpukit/libfs/src/imfs/imfs_unmount.c')
-rw-r--r-- | cpukit/libfs/src/imfs/imfs_unmount.c | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/cpukit/libfs/src/imfs/imfs_unmount.c b/cpukit/libfs/src/imfs/imfs_unmount.c new file mode 100644 index 0000000000..ee1482bfa5 --- /dev/null +++ b/cpukit/libfs/src/imfs/imfs_unmount.c @@ -0,0 +1,62 @@ +/* + * IMFS_unmount + * + * This routine will look at a mount table entry that we are going to + * add to the mount table. If the mount point + * rtems_filesystem_location_info_t struct refers to a node that is a + * directory that has a file system mounted on it, the node will be + * marked as a mount point by * setting its directory.mt_fs pointer + * to NULL. This indicates that a directory is no longer mounted on + * this node. + * + * COPYRIGHT (c) 1989-1999. + * On-Line Applications Research Corporation (OAR). + * + * The license and distribution terms for this file may be + * found in the file LICENSE in this distribution or at + * http://www.rtems.com/license/LICENSE. + * + * $Id$ + */ + +#if HAVE_CONFIG_H +#include "config.h" +#endif + +#include <errno.h> + +#include "imfs.h" +#include <rtems/libio_.h> +#include <rtems/seterr.h> + +int IMFS_unmount( + rtems_filesystem_mount_table_entry_t *mt_entry +) +{ + IMFS_jnode_t *node; + + node = mt_entry->mt_point_node.node_access; + + /* + * Is the node that we are mounting onto a directory node ? + */ + + if ( node->type != IMFS_DIRECTORY ) + rtems_set_errno_and_return_minus_one( ENOTDIR ); + + /* + * Did the node indicate that there was a directory mounted here? + */ + + if ( node->info.directory.mt_fs == NULL ) + rtems_set_errno_and_return_minus_one( EINVAL ); /* XXX */ + + /* + * Set the mt_fs pointer to indicate that there is no longer + * a file system mounted to this point. + */ + + node->info.directory.mt_fs = NULL; + + return 0; +} |