+ range->len = trimmed * sb->s_blocksize;
+ return ret;
+}
+
+int ocfs2_trim_fs(struct super_block *sb, struct fstrim_range *range)
+{
+ int ret;
+ struct ocfs2_super *osb = OCFS2_SB(sb);
+ struct ocfs2_trim_fs_info info, *pinfo = NULL;
+
+ ocfs2_trim_fs_lock_res_init(osb);
+
+ trace_ocfs2_trim_fs(range->start, range->len, range->minlen);
+
+ ret = ocfs2_trim_fs_lock(osb, NULL, 1);
+ if (ret < 0) {
+ if (ret != -EAGAIN) {
+ mlog_errno(ret);
+ ocfs2_trim_fs_lock_res_uninit(osb);
+ return ret;
+ }
+
+ mlog(ML_NOTICE, "Wait for trim on device (%s) to "
+ "finish, which is running from another node.\n",
+ osb->dev_str);
+ ret = ocfs2_trim_fs_lock(osb, &info, 0);
+ if (ret < 0) {
+ mlog_errno(ret);
+ ocfs2_trim_fs_lock_res_uninit(osb);
+ return ret;
+ }
+
+ if (info.tf_valid && info.tf_success &&
+ info.tf_start == range->start &&
+ info.tf_len == range->len &&
+ info.tf_minlen == range->minlen) {
+ /* Avoid sending duplicated trim to a shared device */
+ mlog(ML_NOTICE, "The same trim on device (%s) was "
+ "just done from node (%u), return.\n",
+ osb->dev_str, info.tf_nodenum);
+ range->len = info.tf_trimlen;
+ goto out;
+ }
+ }
+
+ info.tf_nodenum = osb->node_num;
+ info.tf_start = range->start;
+ info.tf_len = range->len;
+ info.tf_minlen = range->minlen;
+
+ ret = ocfs2_trim_mainbm(sb, range);
+
+ info.tf_trimlen = range->len;
+ info.tf_success = (ret < 0 ? 0 : 1);
+ pinfo = &info;
+out:
+ ocfs2_trim_fs_unlock(osb, pinfo);
+ ocfs2_trim_fs_lock_res_uninit(osb);