static int ocfs2_orphan_for_truncate(struct ocfs2_super *osb,
struct inode *inode,
struct buffer_head *fe_bh,
u64 new_i_size)
{
int status;
handle_t *handle;
struct ocfs2_dinode *di;
mlog_entry_void();
/* TODO: This needs to actually orphan the inode in this
* transaction. */
handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
if (IS_ERR(handle)) {
status = PTR_ERR(handle);
mlog_errno(status);
goto out;
}
status = ocfs2_journal_access(handle, inode, fe_bh,
OCFS2_JOURNAL_ACCESS_WRITE);
if (status < 0) {
mlog_errno(status);
goto out_commit;
}
/*
* Do this before setting i_size.
*/
status = ocfs2_zero_tail_for_truncate(inode, handle, new_i_size);
if (status) {
mlog_errno(status);
goto out_commit;
}
i_size_write(inode, new_i_size);
inode->i_blocks = ocfs2_align_bytes_to_sectors(new_i_size);
inode->i_ctime = inode->i_mtime = CURRENT_TIME;
di = (struct ocfs2_dinode *) fe_bh->b_data;
di->i_size = cpu_to_le64(new_i_size);
di->i_ctime = di->i_mtime = cpu_to_le64(inode->i_ctime.tv_sec);
di->i_ctime_nsec = di->i_mtime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
status = ocfs2_journal_dirty(handle, fe_bh);
if (status < 0)
mlog_errno(status);
out_commit:
ocfs2_commit_trans(osb, handle);
out:
mlog_exit(status);
return status;
}
/*
* 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;
}
