errcode_t ocfs2_block_iterate_inode(ocfs2_filesys *fs,
struct ocfs2_dinode *inode,
int flags,
int (*func)(ocfs2_filesys *fs,
uint64_t blkno,
uint64_t bcount,
uint16_t ext_flags,
void *priv_data),
void *priv_data)
{
errcode_t ret;
struct block_context ctxt;
ctxt.inode = inode;
ctxt.flags = flags;
ctxt.func = func;
ctxt.errcode = 0;
ctxt.priv_data = priv_data;
ret = ocfs2_extent_iterate_inode(fs, inode,
OCFS2_EXTENT_FLAG_DATA_ONLY,
NULL,
block_iterate_func, &ctxt);
return ret;
}
errcode_t ocfs2_extent_iterate(ocfs2_filesys *fs,
uint64_t blkno,
int flags,
char *block_buf,
int (*func)(ocfs2_filesys *fs,
struct ocfs2_extent_rec *rec,
int tree_depth,
uint32_t ccount,
uint64_t ref_blkno,
int ref_recno,
void *priv_data),
void *priv_data)
{
char *buf = NULL;
struct ocfs2_dinode *inode;
errcode_t ret;
ret = ocfs2_malloc_block(fs->fs_io, &buf);
if (ret)
return ret;
ret = ocfs2_read_inode(fs, blkno, buf);
if (ret)
goto out_buf;
inode = (struct ocfs2_dinode *)buf;
ret = ocfs2_extent_iterate_inode(fs, inode, flags, block_buf,
func, priv_data);
out_buf:
if (buf)
ocfs2_free(&buf);
return ret;
}
/*
* This function will truncate the file's cluster which exceeds
* the cluster where new_size resides in and empty all the
* bytes in the same cluster which exceeds new_size.
*/
static errcode_t ocfs2_zero_tail_and_truncate_full(ocfs2_filesys *fs,
ocfs2_cached_inode *ci,
uint64_t new_i_size,
uint32_t *new_clusters,
errcode_t (*free_clusters)(ocfs2_filesys *fs,
uint32_t len,
uint64_t start,
void *free_data),
void *free_data)
{
errcode_t ret;
uint64_t new_size_in_blocks;
struct truncate_ctxt ctxt;
new_size_in_blocks = ocfs2_blocks_in_bytes(fs, new_i_size);
ctxt.ino = ci->ci_blkno;
ctxt.new_i_clusters = ci->ci_inode->i_clusters;
ctxt.new_size_in_clusters =
ocfs2_clusters_in_blocks(fs, new_size_in_blocks);
ctxt.free_clusters = free_clusters;
ctxt.free_data = free_data;
ret = ocfs2_extent_iterate_inode(fs, ci->ci_inode,
OCFS2_EXTENT_FLAG_DEPTH_TRAVERSE,
NULL, truncate_iterate,
&ctxt);
if (ret)
goto out;
ret = ocfs2_zero_tail_for_truncate(ci, new_i_size);
if (ret)
goto out;
if (new_clusters)
*new_clusters = ctxt.new_i_clusters;
out:
return ret;
}