static int ocfs2_truncate_for_delete(struct ocfs2_super *osb, struct inode *inode, struct buffer_head *fe_bh) { int status = 0; struct ocfs2_dinode *fe; handle_t *handle = NULL; mlog_entry_void(); fe = (struct ocfs2_dinode *) fe_bh->b_data; /* * This check will also skip truncate of inodes with inline * data and fast symlinks. */ if (fe->i_clusters) { if (ocfs2_should_order_data(inode)) ocfs2_begin_ordered_truncate(inode, 0); handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); if (IS_ERR(handle)) { status = PTR_ERR(handle); handle = NULL; mlog_errno(status); goto out; } status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh, OCFS2_JOURNAL_ACCESS_WRITE); if (status < 0) { mlog_errno(status); goto out; } i_size_write(inode, 0); status = ocfs2_mark_inode_dirty(handle, inode, fe_bh); if (status < 0) { mlog_errno(status); goto out; } ocfs2_commit_trans(osb, handle); handle = NULL; status = ocfs2_commit_truncate(osb, inode, fe_bh); if (status < 0) { mlog_errno(status); goto out; } } out: if (handle) ocfs2_commit_trans(osb, handle); mlog_exit(status); return status; }
static int ocfs2_truncate_file(struct inode *inode, struct buffer_head *di_bh, u64 new_i_size) { int status = 0; struct ocfs2_dinode *fe = NULL; struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); struct ocfs2_truncate_context *tc = NULL; mlog_entry("(inode = %llu, new_i_size = %llu\n", (unsigned long long)OCFS2_I(inode)->ip_blkno, (unsigned long long)new_i_size); unmap_mapping_range(inode->i_mapping, new_i_size + PAGE_SIZE - 1, 0, 1); truncate_inode_pages(inode->i_mapping, new_i_size); fe = (struct ocfs2_dinode *) di_bh->b_data; if (!OCFS2_IS_VALID_DINODE(fe)) { OCFS2_RO_ON_INVALID_DINODE(inode->i_sb, fe); status = -EIO; goto bail; } mlog_bug_on_msg(le64_to_cpu(fe->i_size) != i_size_read(inode), "Inode %llu, inode i_size = %lld != di " "i_size = %llu, i_flags = 0x%x\n", (unsigned long long)OCFS2_I(inode)->ip_blkno, i_size_read(inode), (unsigned long long)le64_to_cpu(fe->i_size), le32_to_cpu(fe->i_flags)); if (new_i_size > le64_to_cpu(fe->i_size)) { mlog(0, "asked to truncate file with size (%llu) to size (%llu)!\n", (unsigned long long)le64_to_cpu(fe->i_size), (unsigned long long)new_i_size); status = -EINVAL; mlog_errno(status); goto bail; } mlog(0, "inode %llu, i_size = %llu, new_i_size = %llu\n", (unsigned long long)le64_to_cpu(fe->i_blkno), (unsigned long long)le64_to_cpu(fe->i_size), (unsigned long long)new_i_size); /* lets handle the simple truncate cases before doing any more * cluster locking. */ if (new_i_size == le64_to_cpu(fe->i_size)) goto bail; /* This forces other nodes to sync and drop their pages. Do * this even if we have a truncate without allocation change - * ocfs2 cluster sizes can be much greater than page size, so * we have to truncate them anyway. */ status = ocfs2_data_lock(inode, 1); if (status < 0) { mlog_errno(status); goto bail; } /* alright, we're going to need to do a full blown alloc size * change. Orphan the inode so that recovery can complete the * truncate if necessary. This does the task of marking * i_size. */ status = ocfs2_orphan_for_truncate(osb, inode, di_bh, new_i_size); if (status < 0) { mlog_errno(status); goto bail_unlock_data; } status = ocfs2_prepare_truncate(osb, inode, di_bh, &tc); if (status < 0) { mlog_errno(status); goto bail_unlock_data; } status = ocfs2_commit_truncate(osb, inode, di_bh, tc); if (status < 0) { mlog_errno(status); goto bail_unlock_data; } /* TODO: orphan dir cleanup here. */ bail_unlock_data: ocfs2_data_unlock(inode, 1); bail: mlog_exit(status); return status; }