errcode_t ocfs2_cached_inode_insert_extent(ocfs2_cached_inode *ci,
uint32_t cpos, uint64_t c_blkno,
uint32_t clusters, uint16_t flag)
{
struct ocfs2_extent_tree et;
ocfs2_init_dinode_extent_tree(&et, ci->ci_fs, (char *)ci->ci_inode,
ci->ci_inode->i_blkno);
return ocfs2_tree_insert_extent(ci->ci_fs, &et, cpos, c_blkno,
clusters, flag);
}
/*
* Mark the already-existing extent at cpos as written for len clusters.
*
* If the existing extent is larger than the request, initiate a
* split. An attempt will be made at merging with adjacent extents.
*
*/
int ocfs2_mark_extent_written(ocfs2_filesys *fs, struct ocfs2_dinode *di,
uint32_t cpos, uint32_t len,
uint64_t p_blkno)
{
struct ocfs2_extent_tree et;
if (!ocfs2_writes_unwritten_extents(OCFS2_RAW_SB(fs->fs_super)))
return OCFS2_ET_UNSUPP_FEATURE;
ocfs2_init_dinode_extent_tree(&et, fs, (char *)di, di->i_blkno);
return ocfs2_change_extent_flag(fs, &et, cpos, len, p_blkno,
0, OCFS2_EXT_UNWRITTEN);
}
static int __ocfs2_move_extents_range(struct buffer_head *di_bh,
struct ocfs2_move_extents_context *context)
{
int ret = 0, flags, do_defrag, skip = 0;
u32 cpos, phys_cpos, move_start, len_to_move, alloc_size;
u32 len_defraged = 0, defrag_thresh = 0, new_phys_cpos = 0;
struct inode *inode = context->inode;
struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
struct ocfs2_move_extents *range = context->range;
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
if ((inode->i_size == 0) || (range->me_len == 0))
return 0;
if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL)
return 0;
context->refcount_loc = le64_to_cpu(di->i_refcount_loc);
ocfs2_init_dinode_extent_tree(&context->et, INODE_CACHE(inode), di_bh);
ocfs2_init_dealloc_ctxt(&context->dealloc);
/*
* TO-DO XXX:
*
* - xattr extents.
*/
do_defrag = context->auto_defrag;
/*
* extents moving happens in unit of clusters, for the sake
* of simplicity, we may ignore two clusters where 'byte_start'
* and 'byte_start + len' were within.
*/
move_start = ocfs2_clusters_for_bytes(osb->sb, range->me_start);
len_to_move = (range->me_start + range->me_len) >>
osb->s_clustersize_bits;
if (len_to_move >= move_start)
len_to_move -= move_start;
else
len_to_move = 0;
if (do_defrag) {
defrag_thresh = range->me_threshold >> osb->s_clustersize_bits;
if (defrag_thresh <= 1)
goto done;
} else
