nfs/flexfilelayout/flexfilelayoutdev.c

253 			     struct nfs4_ff_layout_mirror *mirror, u64 offset,
262 	if (IS_ERR_OR_NULL(mirror->mirror_ds))
274 	nfs4_stateid_copy(&dserr->stateid, &mirror->stateid);
275 	memcpy(&dserr->deviceid, &mirror->mirror_ds->id_node.deviceid,
285 ff_layout_get_mirror_cred(struct nfs4_ff_layout_mirror *mirror, u32 iomode)
290 		pcred = &mirror->ro_cred;
292 		pcred = &mirror->rw_cred;
307 nfs4_ff_layout_select_ds_fh(struct nfs4_ff_layout_mirror *mirror)
310 	return &mirror->fh_versions[0];
314 nfs4_ff_layout_select_ds_stateid(const struct nfs4_ff_layout_mirror *mirror,
317 	if (nfs4_ff_layout_ds_version(mirror) == 4)
318 		nfs4_stateid_copy(stateid, &mirror->stateid);
323 			 struct nfs4_ff_layout_mirror *mirror)
325 	if (mirror == NULL)
327 	if (mirror->mirror_ds == NULL) {
332 				&mirror->devid, lo->plh_lc_cred,
338 		if (cmpxchg(&mirror->mirror_ds, NULL, mirror_ds) &&
343 	if (IS_ERR(mirror->mirror_ds))
354  * @mirror: layout mirror describing the DS to use
358  * selecting a mirror to use and connecting the client to it if it's not
361  * Since we only need a single functioning mirror to satisfy a read, we don't
363  * mirror should result in a LAYOUTRETURN. @fail_return is how we distinguish
370 			  struct nfs4_ff_layout_mirror *mirror,
379 	if (!ff_layout_init_mirror_ds(lseg->pls_layout, mirror))
382 	ds = mirror->mirror_ds->ds;
391 	status = nfs4_pnfs_ds_connect(s, ds, &mirror->mirror_ds->id_node,
393 			     mirror->mirror_ds->ds_versions[0].version,
394 			     mirror->mirror_ds->ds_versions[0].minor_version);
401 		if (mirror->mirror_ds->ds_versions[0].rsize > max_payload)
402 			mirror->mirror_ds->ds_versions[0].rsize = max_payload;
403 		if (mirror->mirror_ds->ds_versions[0].wsize > max_payload)
404 			mirror->mirror_ds->ds_versions[0].wsize = max_payload;
409 				 mirror, lseg->pls_range.offset,
421 ff_layout_get_ds_cred(struct nfs4_ff_layout_mirror *mirror,
427 	if (mirror && !mirror->mirror_ds->ds_versions[0].tightly_coupled) {
428 		cred = ff_layout_get_mirror_cred(mirror, range->iomode);
439  * @mirror: pointer to the mirror
447 nfs4_ff_find_or_create_ds_client(struct nfs4_ff_layout_mirror *mirror,
450 	switch (mirror->mirror_ds->ds_versions[0].version) {
554 	struct nfs4_ff_layout_mirror *mirror;
559 		mirror = FF_LAYOUT_COMP(lseg, idx);
560 		if (mirror) {
561 			if (!mirror->mirror_ds)
563 			if (IS_ERR(mirror->mirror_ds))
565 			devid = &mirror->mirror_ds->id_node;
576 	struct nfs4_ff_layout_mirror *mirror;
581 		mirror = FF_LAYOUT_COMP(lseg, idx);
582 		if (!mirror || IS_ERR(mirror->mirror_ds))
584 		if (!mirror->mirror_ds)
586 		devid = &mirror->mirror_ds->id_node;