+int filter_write_extents(struct obd_export *exp, struct obd_ioobj *obj,
+ int niocount, struct niobuf_local *local,
+ int rc)
+{
+ struct lvfs_run_ctxt saved;
+ struct dentry *dentry;
+ struct niobuf_local *lnb;
+ __u64 offset = 0;
+ __u32 len = 0;
+ int i;
+
+ ENTRY;
+
+ push_ctxt(&saved, &exp->exp_obd->obd_lvfs_ctxt, NULL);
+
+ dentry = filter_fid2dentry(exp->exp_obd, NULL, obj->ioo_gr,
+ obj->ioo_id);
+ if (IS_ERR(dentry)) {
+ pop_ctxt(&saved, &exp->exp_obd->obd_lvfs_ctxt, NULL);
+ RETURN (PTR_ERR(dentry));
+ }
+
+ if (dentry->d_inode == NULL) {
+ CERROR("trying to write extents to non-existent file "LPU64"\n",
+ obj->ioo_id);
+ GOTO(cleanup, rc = -ENOENT);
+ }
+
+ for (i = 0, lnb = local; i < obj->ioo_bufcnt; i++, lnb++) {
+ if (len == 0) {
+ offset = lnb->offset;
+ len = lnb->len;
+ } else if (lnb->offset == (offset + len)) {
+ len += lnb->len;
+ } else {
+ rc = fsfilt_write_extents(exp->exp_obd, dentry,
+ offset, len);
+ if (rc) {
+ CERROR("write exts off "LPU64" num %u rc:%d\n",
+ offset, len, rc);
+ GOTO(cleanup, rc);
+ }
+ offset = lnb->offset;
+ len = lnb->len;
+ }
+ }
+ if (len > 0) {
+ rc = fsfilt_write_extents(exp->exp_obd, dentry,
+ offset, len);
+ if (rc) {
+ CERROR("write exts off "LPU64" num %u rc:%d\n",
+ offset, len, rc);
+ GOTO(cleanup, rc);
+ }
+ }
+cleanup:
+ f_dput(dentry);
+ pop_ctxt(&saved, &exp->exp_obd->obd_lvfs_ctxt, NULL);
+ return rc;
+}
+