nfs/flexfilelayout/flexfilelayout.h

1 /* SPDX-License-Identifier: GPL-2.0 */
3  * NFSv4 flexfile layout driver data structures.
5  * Copyright (c) 2014, Primary Data, Inc. All rights reserved.
20 /* XXX: Let's filter out insanely large mirror count for now to avoid oom
45 	struct list_head		list; /* linked in mirror error_list */
146 	if (idx < fls->mirror_array_cnt)  in FF_LAYOUT_COMP()
147 		return fls->mirror_array[idx];  in FF_LAYOUT_COMP()
154 	struct nfs4_ff_layout_mirror *mirror = FF_LAYOUT_COMP(lseg, idx);  in FF_LAYOUT_DEVID_NODE()  local
156 	if (mirror != NULL) {  in FF_LAYOUT_DEVID_NODE()
157 		struct nfs4_ff_layout_ds *mirror_ds = mirror->mirror_ds;  in FF_LAYOUT_DEVID_NODE()
160 			return &mirror_ds->id_node;  in FF_LAYOUT_DEVID_NODE()
168 	return FF_LAYOUT_LSEG(lseg)->mirror_array_cnt;  in FF_LAYOUT_MIRROR_COUNT()
174 	return FF_LAYOUT_LSEG(lseg)->flags & FF_FLAGS_NO_IO_THRU_MDS;  in ff_layout_no_fallback_to_mds()
180 	return FF_LAYOUT_LSEG(lseg)->flags & FF_FLAGS_NO_READ_IO;  in ff_layout_no_read_on_rw()
184 nfs4_ff_layout_ds_version(const struct nfs4_ff_layout_mirror *mirror)  in nfs4_ff_layout_ds_version()  argument
186 	return mirror->mirror_ds->ds_versions[0].version;  in nfs4_ff_layout_ds_version()
195 			     struct nfs4_ff_layout_mirror *mirror, u64 offset,
206 nfs4_ff_layout_select_ds_fh(struct nfs4_ff_layout_mirror *mirror);
208 nfs4_ff_layout_select_ds_stateid(const struct nfs4_ff_layout_mirror *mirror,
213 			  struct nfs4_ff_layout_mirror *mirror,
217 nfs4_ff_find_or_create_ds_client(struct nfs4_ff_layout_mirror *mirror,
220 const struct cred *ff_layout_get_ds_cred(struct nfs4_ff_layout_mirror *mirror,