/* _fat_block_release --
* This function works around the hack that hold a bdbuf and does
* not release it.
*
* PARAMETERS:
* mt_entry - mount table entry
*
* RETURNS:
* 0 on success, or -1 if error occured and errno set appropriately
*/
int
_fat_block_release(
rtems_filesystem_mount_table_entry_t *mt_entry)
{
fat_fs_info_t *fs_info = mt_entry->fs_info;
return fat_buf_release(fs_info);
}
/* fat_file_close --
* Close fat-file. If count of links to fat-file
* descriptor is greater than 1 (i.e. somebody esle holds pointer
* to this descriptor) just decrement it. Otherwise
* do the following. If this descriptor corresponded to removed fat-file
* then free clusters contained fat-file data, delete descriptor from
* "rhash" table and free memory allocated by descriptor. If descriptor
* correspondes to non-removed fat-file and 'ino' field has value from
* unique inode numbers pool then set count of links to descriptor to zero
* and leave it in hash, otherwise delete descriptor from "vhash" and free
* memory allocated by the descriptor
*
* PARAMETERS:
* mt_entry - mount table entry
* fat_fd - fat-file descriptor
*
* RETURNS:
* RC_OK, or -1 if error occured (errno set appropriately)
*/
int
fat_file_close(
rtems_filesystem_mount_table_entry_t *mt_entry,
fat_file_fd_t *fat_fd
)
{
int rc = RC_OK;
fat_fs_info_t *fs_info = mt_entry->fs_info;
uint32_t key = 0;
/*
* if links_num field of fat-file descriptor is greater than 1
* decrement the count of links and return
*/
if (fat_fd->links_num > 1)
{
fat_fd->links_num--;
return rc;
}
key = fat_construct_key(mt_entry, &fat_fd->dir_pos.sname);
if (fat_fd->flags & FAT_FILE_REMOVED)
{
rc = fat_file_truncate(mt_entry, fat_fd, 0);
if ( rc != RC_OK )
return rc;
_hash_delete(fs_info->rhash, key, fat_fd->ino, fat_fd);
if ( fat_ino_is_unique(mt_entry, fat_fd->ino) )
fat_free_unique_ino(mt_entry, fat_fd->ino);
free(fat_fd);
}
else
{
if (fat_ino_is_unique(mt_entry, fat_fd->ino))
{
fat_fd->links_num = 0;
}
else
{
_hash_delete(fs_info->vhash, key, fat_fd->ino, fat_fd);
free(fat_fd);
}
}
/*
* flush any modified "cached" buffer back to disk
*/
rc = fat_buf_release(fs_info);
return rc;
}
/* fat_shutdown_drive --
* Free all allocated resources and synchronize all necessary data
*
* PARAMETERS:
* mt_entry - mount table entry
*
* RETURNS:
* RC_OK on success, or -1 if error occured
* and errno set appropriately
*/
int
fat_shutdown_drive(rtems_filesystem_mount_table_entry_t *mt_entry)
{
int rc = RC_OK;
fat_fs_info_t *fs_info = mt_entry->fs_info;
int i = 0;
if (fs_info->vol.type & FAT_FAT32)
{
rc = fat_fat32_update_fsinfo_sector(mt_entry, fs_info->vol.free_cls,
fs_info->vol.next_cl);
if ( rc != RC_OK )
rc = -1;
}
fat_buf_release(fs_info);
if (rtems_bdbuf_syncdev(fs_info->vol.dev) != RTEMS_SUCCESSFUL)
rc = -1;
for (i = 0; i < FAT_HASH_SIZE; i++)
{
Chain_Node *node = NULL;
Chain_Control *the_chain = fs_info->vhash + i;
while ( (node = _Chain_Get(the_chain)) != NULL )
free(node);
}
for (i = 0; i < FAT_HASH_SIZE; i++)
{
Chain_Node *node = NULL;
Chain_Control *the_chain = fs_info->rhash + i;
while ( (node = _Chain_Get(the_chain)) != NULL )
free(node);
}
free(fs_info->vhash);
free(fs_info->rhash);
free(fs_info->uino);
free(fs_info->sec_buf);
rtems_disk_release(fs_info->vol.dd);
if (rc)
errno = EIO;
return rc;
}
