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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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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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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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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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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77 | IMFS_Set_handlers( &loc ); |
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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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