int
rtems_rfs_inode_delete (rtems_rfs_file_system* fs,
rtems_rfs_inode_handle* handle)
{
int rc = 0;
if (rtems_rfs_trace (RTEMS_RFS_TRACE_INODE_DELETE))
printf("rtems-rfs: inode-delete: ino:%" PRIu32 " loaded:%s\n",
rtems_rfs_inode_ino (handle),
rtems_rfs_inode_is_loaded (handle) ? "yes" : "no");
if (rtems_rfs_inode_is_loaded (handle))
{
rtems_rfs_block_map map;
/*
* Free the ino number.
*/
rc = rtems_rfs_inode_free (fs, handle->ino);
if (rc > 0)
return rc;
/*
* Free the blocks the inode may have attached.
*/
rc = rtems_rfs_block_map_open (fs, handle, &map);
if (rc == 0)
{
int rrc;
rrc = rtems_rfs_block_map_free_all (fs, &map);
rc = rtems_rfs_block_map_close (fs, &map);
if (rc > 0)
rrc = rc;
memset (handle->node, 0xff, RTEMS_RFS_INODE_SIZE);
rtems_rfs_buffer_mark_dirty (&handle->buffer);
/*
* Do the release here to avoid the ctime field being set on a
* close. Also if there loads is greater then one then other loads
* active. Forcing the loads count to 0.
*/
rc = rtems_rfs_buffer_handle_release (fs, &handle->buffer);
handle->loads = 0;
handle->node = NULL;
}
}
return rc;
}
int
rtems_rfs_file_set_size (rtems_rfs_file_handle* handle,
rtems_rfs_pos new_size)
{
rtems_rfs_block_map* map = rtems_rfs_file_map (handle);
rtems_rfs_pos size;
int rc;
if (rtems_rfs_trace (RTEMS_RFS_TRACE_FILE_IO))
printf ("rtems-rfs: file-set-size: size=%" PRIu64 "\n", new_size);
size = rtems_rfs_file_size (handle);
/*
* If the file is same size do nothing else grow or shrink it ?
*
* If the file does not change size do not update the times.
*/
if (size != new_size)
{
/*
* Short cut for the common truncate on open call.
*/
if (new_size == 0)
{
rc = rtems_rfs_block_map_free_all (rtems_rfs_file_fs (handle), map);
if (rc > 0)
return rc;
}
else
{
if (size < new_size)
{
/*
* Grow. Fill with 0's.
*/
rtems_rfs_pos count;
uint32_t length;
bool read_block;
count = new_size - size;
length = rtems_rfs_fs_block_size (rtems_rfs_file_fs (handle));
read_block = false;
while (count)
{
rtems_rfs_buffer_block block;
rtems_rfs_block_pos bpos;
uint8_t* dst;
/*
* Get the block position for the current end of the file as seen by
* the map. If not found and the EOF grow the map then fill the block
* with 0.
*/
rtems_rfs_block_size_get_bpos (rtems_rfs_block_map_size (map), &bpos);
rc = rtems_rfs_block_map_find (rtems_rfs_file_fs (handle),
map, &bpos, &block);
if (rc > 0)
{
/*
* Have we reached the EOF ?
*/
if (rc != ENXIO)
return rc;
rc = rtems_rfs_block_map_grow (rtems_rfs_file_fs (handle),
map, 1, &block);
if (rc > 0)
return rc;
}
if (count < (length - bpos.boff))
{
length = count + bpos.boff;
read_block = true;
rtems_rfs_block_map_set_size_offset (map, length);
}
else
{
rtems_rfs_block_map_set_size_offset (map, 0);
}
/*
* Only read the block if the length is not the block size.
*/
rc = rtems_rfs_buffer_handle_request (rtems_rfs_file_fs (handle),
rtems_rfs_file_buffer (handle),
block, read_block);
if (rc > 0)
return rc;
dst = rtems_rfs_buffer_data (&handle->buffer);
memset (dst + bpos.boff, 0, length - bpos.boff);
rtems_rfs_buffer_mark_dirty (rtems_rfs_file_buffer (handle));
rc = rtems_rfs_buffer_handle_release (rtems_rfs_file_fs (handle),
rtems_rfs_file_buffer (handle));
if (rc > 0)
return rc;
count -= length - bpos.boff;
}
}
else
{
/*
* Shrink
*/
rtems_rfs_block_no blocks;
uint32_t offset;
blocks =
rtems_rfs_block_map_count (map) -
(((new_size - 1) /
rtems_rfs_fs_block_size (rtems_rfs_file_fs (handle))) + 1);
offset =
new_size % rtems_rfs_fs_block_size (rtems_rfs_file_fs (handle));
if (blocks)
{
int rc;
rc = rtems_rfs_block_map_shrink (rtems_rfs_file_fs (handle),
rtems_rfs_file_map (handle),
blocks);
if (rc > 0)
return rc;
}
rtems_rfs_block_map_set_size_offset (map, offset);
if (rtems_rfs_block_pos_past_end (rtems_rfs_file_bpos (handle),
rtems_rfs_block_map_size (map)))
rtems_rfs_block_size_get_bpos (rtems_rfs_block_map_size (map),
rtems_rfs_file_bpos (handle));
}
}
handle->shared->size.count = rtems_rfs_block_map_count (map);
handle->shared->size.offset = rtems_rfs_block_map_size_offset (map);
if (rtems_rfs_file_update_mtime (handle))
handle->shared->mtime = time (NULL);
}
return 0;
}
