[657e1bf6] | 1 | /* |
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| 2 | * IMFS Initialization |
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| 3 | * |
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| 4 | * COPYRIGHT (c) 1989-1998. |
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| 5 | * On-Line Applications Research Corporation (OAR). |
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| 6 | * Copyright assigned to U.S. Government, 1994. |
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| 7 | * |
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| 8 | * The license and distribution terms for this file may be |
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| 9 | * found in the file LICENSE in this distribution or at |
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| 10 | * http://www.OARcorp.com/rtems/license.html. |
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| 11 | * |
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| 12 | * $Id$ |
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| 13 | */ |
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| 14 | |
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| 15 | #include <sys/types.h> /* for mkdir */ |
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| 16 | #include <fcntl.h> |
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| 17 | #include <unistd.h> |
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| 18 | #include <stdlib.h> |
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| 19 | |
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| 20 | #include <assert.h> |
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| 21 | |
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| 22 | #include "imfs.h" |
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| 23 | #include "libio_.h" |
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| 24 | |
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| 25 | #if defined(IMFS_DEBUG) |
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| 26 | #include <stdio.h> |
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| 27 | #endif |
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| 28 | |
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| 29 | /* |
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| 30 | * IMFS_fsunmount |
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| 31 | */ |
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| 32 | |
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| 33 | #define jnode_get_control( jnode ) \ |
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| 34 | (&jnode->info.directory.Entries) |
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| 35 | |
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| 36 | #define jnode_has_no_children( jnode ) \ |
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| 37 | Chain_Is_empty( jnode_get_control( jnode ) ) |
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| 38 | |
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| 39 | #define jnode_has_children( jnode ) \ |
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| 40 | ( ! jnode_has_no_children( jnode ) ) |
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| 41 | |
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| 42 | #define jnode_get_first_child( jnode ) \ |
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| 43 | ((IMFS_jnode_t *)( Chain_Head( jnode_get_control( jnode ) )->next)) |
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| 44 | |
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[94b357c2] | 45 | /* XXX should be in a more public place */ |
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| 46 | |
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| 47 | extern int IMFS_Set_handlers( |
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| 48 | rtems_filesystem_location_info_t *loc |
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| 49 | ); |
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[657e1bf6] | 50 | |
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| 51 | int IMFS_fsunmount( |
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| 52 | rtems_filesystem_mount_table_entry_t *temp_mt_entry |
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| 53 | ) |
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| 54 | { |
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| 55 | IMFS_jnode_t *jnode; |
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| 56 | IMFS_jnode_t *next; |
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| 57 | rtems_filesystem_location_info_t loc; |
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| 58 | int result = 0; |
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| 59 | |
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| 60 | /* |
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| 61 | * Traverse tree that starts at the mt_fs_root and deallocate memory |
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| 62 | * associated memory space |
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| 63 | */ |
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| 64 | |
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| 65 | jnode = (IMFS_jnode_t *)temp_mt_entry->mt_fs_root.node_access; |
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[ac8adcf] | 66 | loc = temp_mt_entry->mt_fs_root; |
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| 67 | |
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| 68 | /* |
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| 69 | * Set this to null to indicate that it is being unmounted. |
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| 70 | */ |
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| 71 | |
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| 72 | temp_mt_entry->mt_fs_root.node_access = NULL; |
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[657e1bf6] | 73 | |
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| 74 | do { |
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| 75 | next = jnode->Parent; |
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| 76 | loc.node_access = (void *)jnode; |
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[94b357c2] | 77 | IMFS_Set_handlers( &loc ); |
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[657e1bf6] | 78 | |
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| 79 | if ( jnode->type != IMFS_DIRECTORY ) { |
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| 80 | result = IMFS_unlink( &loc ); |
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| 81 | if (result != 0) |
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| 82 | return -1; |
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| 83 | jnode = next; |
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| 84 | } else if ( jnode_has_no_children( jnode ) ) { |
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| 85 | result = IMFS_unlink( &loc ); |
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| 86 | if (result != 0) |
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| 87 | return -1; |
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| 88 | jnode = next; |
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| 89 | } |
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| 90 | if ( jnode != NULL ) { |
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| 91 | if ( jnode->type == IMFS_DIRECTORY ) { |
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| 92 | if ( jnode_has_children( jnode ) ) |
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| 93 | jnode = jnode_get_first_child( jnode ); |
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| 94 | } |
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| 95 | } |
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| 96 | } while (jnode != NULL); |
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| 97 | |
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| 98 | return 0; |
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| 99 | } |
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| 100 | |
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| 101 | |
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| 102 | |
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| 103 | |
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