int
rtems_rfs_block_map_open (rtems_rfs_file_system* fs,
rtems_rfs_inode_handle* inode,
rtems_rfs_block_map* map)
{
int b;
int rc;
/*
* Set the count to 0 so at least find fails, then open the handle and make
* sure the inode has been loaded into memory. If we did not load the inode
* do not unload it. The caller may assume it is still loaded when we return.
*/
map->dirty = false;
map->inode = NULL;
rtems_rfs_block_set_size_zero (&map->size);
rtems_rfs_block_set_bpos_zero (&map->bpos);
rc = rtems_rfs_buffer_handle_open (fs, &map->singly_buffer);
if (rc > 0)
return rc;
rc = rtems_rfs_buffer_handle_open (fs, &map->doubly_buffer);
if (rc > 0)
return rc;
rc = rtems_rfs_inode_load (fs, inode);
if (rc > 0)
{
rtems_rfs_buffer_handle_close (fs, &map->singly_buffer);
rtems_rfs_buffer_handle_close (fs, &map->doubly_buffer);
return rc;
}
/*
* Extract the block and block count data from the inode into the targets
* byte order.
*/
map->inode = inode;
for (b = 0; b < RTEMS_RFS_INODE_BLOCKS; b++)
map->blocks[b] = rtems_rfs_inode_get_block (inode, b);
map->size.count = rtems_rfs_inode_get_block_count (inode);
map->size.offset = rtems_rfs_inode_get_block_offset (inode);
map->last_map_block = rtems_rfs_inode_get_last_map_block (inode);
map->last_data_block = rtems_rfs_inode_get_last_data_block (inode);
rc = rtems_rfs_inode_unload (fs, inode, false);
return rc;
}
int
rtems_rfs_block_map_close (rtems_rfs_file_system* fs,
rtems_rfs_block_map* map)
{
int rc = 0;
int brc;
if (map->dirty && map->inode)
{
brc = rtems_rfs_inode_load (fs, map->inode);
if (brc > 0)
rc = brc;
if (rc == 0)
{
int b;
for (b = 0; b < RTEMS_RFS_INODE_BLOCKS; b++)
rtems_rfs_inode_set_block (map->inode, b, map->blocks[b]);
rtems_rfs_inode_set_block_count (map->inode, map->size.count);
rtems_rfs_inode_set_block_offset (map->inode, map->size.offset);
rtems_rfs_inode_set_last_map_block (map->inode, map->last_map_block);
rtems_rfs_inode_set_last_data_block (map->inode, map->last_data_block);
brc = rtems_rfs_inode_unload (fs, map->inode, true);
if (brc > 0)
rc = brc;
map->dirty = false;
}
}
map->inode = NULL;
brc = rtems_rfs_buffer_handle_close (fs, &map->singly_buffer);
if ((brc > 0) && (rc == 0))
rc = brc;
brc = rtems_rfs_buffer_handle_close (fs, &map->doubly_buffer);
if ((brc > 0) && (rc == 0))
rc = brc;
return rc;
}
int
rtems_rfs_inode_open (rtems_rfs_file_system* fs,
rtems_rfs_ino ino,
rtems_rfs_inode_handle* handle,
bool load)
{
int group;
int gino;
int index;
int rc;
if (rtems_rfs_trace (RTEMS_RFS_TRACE_INODE_OPEN))
printf ("rtems-rfs: inode-open: ino: %" PRIu32 "\n", ino);
if (ino == RTEMS_RFS_EMPTY_INO)
return EINVAL;
if ((ino - RTEMS_RFS_ROOT_INO) > rtems_rfs_fs_inodes (fs))
return EINVAL;
handle->ino = ino;
handle->node = NULL;
handle->loads = 0;
gino = ino - RTEMS_RFS_ROOT_INO;
group = gino / fs->group_inodes;
gino = gino % fs->group_inodes;
index = (gino / fs->inodes_per_block) + RTEMS_RFS_GROUP_INODE_BLOCK;
handle->offset = gino % fs->inodes_per_block;
handle->block = rtems_rfs_group_block (&fs->groups[group], index);
rc = rtems_rfs_buffer_handle_open (fs, &handle->buffer);
if ((rc == 0) && load)
rc = rtems_rfs_inode_load (fs, handle);
return rc;
}
int
rtems_rfs_file_close (rtems_rfs_file_system* fs,
rtems_rfs_file_handle* handle)
{
int rrc;
int rc;
rrc = 0;
if (rtems_rfs_trace (RTEMS_RFS_TRACE_FILE_CLOSE))
printf ("rtems-rfs: file-close: entry: ino=%" PRId32 "\n",
handle->shared->inode.ino);
if (handle->shared->references > 0)
handle->shared->references--;
if (handle->shared->references == 0)
{
if (!rtems_rfs_inode_is_loaded (&handle->shared->inode))
rrc = rtems_rfs_inode_load (fs, &handle->shared->inode);
if (rrc == 0)
{
/*
* @todo This could be clever and only update if different.
*/
rtems_rfs_inode_set_atime (&handle->shared->inode,
handle->shared->atime);
rtems_rfs_inode_set_mtime (&handle->shared->inode,
handle->shared->mtime);
rtems_rfs_inode_set_ctime (&handle->shared->inode,
handle->shared->ctime);
if (!rtems_rfs_block_size_equal (&handle->shared->size,
&handle->shared->map.size))
rtems_rfs_block_map_set_size (&handle->shared->map,
&handle->shared->size);
}
rc = rtems_rfs_block_map_close (fs, &handle->shared->map);
if (rc > 0)
{
if (rtems_rfs_trace (RTEMS_RFS_TRACE_FILE_CLOSE))
printf ("rtems-rfs: file-close: map close error: ino=%" PRId32 ": %d: %s\n",
handle->shared->inode.ino, rc, strerror (rc));
if (rrc == 0)
rrc = rc;
}
rc = rtems_rfs_inode_close (fs, &handle->shared->inode);
if (rc > 0)
{
if (rtems_rfs_trace (RTEMS_RFS_TRACE_FILE_CLOSE))
printf ("rtems-rfs: file-close: inode close error: ino=%" PRId32 ": %d: %s\n",
handle->shared->inode.ino, rc, strerror (rc));
if (rrc == 0)
rrc = rc;
}
rtems_chain_extract (&handle->shared->link);
free (handle->shared);
}
rc = rtems_rfs_buffer_handle_close (fs, &handle->buffer);
if ((rrc == 0) && (rc > 0))
rrc = rc;
if (rrc > 0)
{
if (rtems_rfs_trace (RTEMS_RFS_TRACE_FILE_CLOSE))
printf ("rtems-rfs: file-close: result: %d: %s\n", rrc, strerror (rrc));
}
free (handle);
return rrc;
}
