blob: 1ae71ee075f9e53cabd6bb4c4ee5d05a740892d4 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
|
/*
* IMFS Initialization
*
* 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.OARcorp.com/rtems/license.html.
*
* $Id$
*/
#include <sys/types.h> /* for mkdir */
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <assert.h>
#include "imfs.h"
#include "libio_.h"
#if defined(IMFS_DEBUG)
#include <stdio.h>
#endif
/*
* IMFS_fsunmount
*/
#define jnode_get_control( jnode ) \
(&jnode->info.directory.Entries)
#define jnode_has_no_children( jnode ) \
Chain_Is_empty( jnode_get_control( jnode ) )
#define jnode_has_children( jnode ) \
( ! jnode_has_no_children( jnode ) )
#define jnode_get_first_child( jnode ) \
((IMFS_jnode_t *)( Chain_Head( jnode_get_control( jnode ) )->next))
int IMFS_fsunmount(
rtems_filesystem_mount_table_entry_t *temp_mt_entry
)
{
IMFS_jnode_t *jnode;
IMFS_jnode_t *next;
rtems_filesystem_location_info_t loc;
int result = 0;
/*
* Traverse tree that starts at the mt_fs_root and deallocate memory
* associated memory space
*/
jnode = (IMFS_jnode_t *)temp_mt_entry->mt_fs_root.node_access;
loc = temp_mt_entry->mt_fs_root;
/*
* Set this to null to indicate that it is being unmounted.
*/
temp_mt_entry->mt_fs_root.node_access = NULL;
do {
next = jnode->Parent;
loc.node_access = (void *)jnode;
IMFS_Set_handlers( &loc );
if ( jnode->type != IMFS_DIRECTORY ) {
result = IMFS_unlink( &loc );
if (result != 0)
return -1;
jnode = next;
} else if ( jnode_has_no_children( jnode ) ) {
result = IMFS_unlink( &loc );
if (result != 0)
return -1;
jnode = next;
}
if ( jnode != NULL ) {
if ( jnode->type == IMFS_DIRECTORY ) {
if ( jnode_has_children( jnode ) )
jnode = jnode_get_first_child( jnode );
}
}
} while (jnode != NULL);
return 0;
}
|