nfs/filelayout/filelayout.c

74 filelayout_get_dserver_offset(struct pnfs_layout_segment *lseg, loff_t offset)
76 	struct nfs4_filelayout_segment *flseg = FILELAYOUT_LSEG(lseg);
126 					 struct pnfs_layout_segment *lseg)
128 	struct pnfs_layout_hdr *lo = lseg->pls_layout;
130 	struct nfs4_deviceid_node *devid = FILELAYOUT_DEVID_NODE(lseg);
168 		 * Layout will not be destroyed until all current lseg
189 		pnfs_error_mark_layout_for_return(inode, lseg);
190 		pnfs_set_lo_fail(lseg);
212 					    hdr->ds_clp, hdr->lseg);
236 	if (FILELAYOUT_LSEG(hdr->lseg)->commit_through_mds ||
243 	pnfs_set_layoutcommit(hdr->inode, hdr->lseg, end_offs);
256 filelayout_reset_to_mds(struct pnfs_layout_segment *lseg)
258 	struct nfs4_deviceid_node *node = FILELAYOUT_DEVID_NODE(lseg);
276 	if (filelayout_reset_to_mds(hdr->lseg)) {
322 					    hdr->ds_clp, hdr->lseg);
350 					    data->lseg);
361 	pnfs_set_layoutcommit(data->inode, data->lseg, data->lwb);
374 	if (filelayout_reset_to_mds(hdr->lseg)) {
452 	struct pnfs_layout_segment *lseg = hdr->lseg;
464 	j = nfs4_fl_calc_j_index(lseg, offset);
465 	idx = nfs4_fl_calc_ds_index(lseg, j);
466 	ds = nfs4_fl_prepare_ds(lseg, idx);
481 	fh = nfs4_fl_select_ds_fh(lseg, j);
485 	hdr->args.offset = filelayout_get_dserver_offset(lseg, offset);
499 	struct pnfs_layout_segment *lseg = hdr->lseg;
507 	j = nfs4_fl_calc_j_index(lseg, offset);
508 	idx = nfs4_fl_calc_ds_index(lseg, j);
509 	ds = nfs4_fl_prepare_ds(lseg, idx);
525 	fh = nfs4_fl_select_ds_fh(lseg, j);
528 	hdr->args.offset = filelayout_get_dserver_offset(lseg, offset);
594  * At this point no generic layer initialization of the lseg has occurred,
744 filelayout_free_lseg(struct pnfs_layout_segment *lseg)
746 	struct nfs4_filelayout_segment *fl = FILELAYOUT_LSEG(lseg);
751 	/* This assumes a single RW lseg */
752 	if (lseg->pls_range.iomode == IOMODE_RW) {
756 		flo = FILELAYOUT_FROM_HDR(lseg->pls_layout);
759 		pnfs_generic_ds_cinfo_release_lseg(&flo->commit_info, lseg);
845 	struct pnfs_layout_segment *lseg = NULL;
850 	lseg = pnfs_update_layout(ino, ctx, pos, count, iomode, strict_iomode,
852 	if (IS_ERR(lseg)) {
854 		if (!nfs_error_is_fatal_on_server(PTR_ERR(lseg)))
855 			lseg = NULL;
857 	} else if (!lseg)
861 	fl = FILELAYOUT_LSEG(lseg);
865 		pnfs_error_mark_layout_for_return(ino, lseg);
866 		pnfs_set_lo_fail(lseg);
867 		pnfs_put_lseg(lseg);
868 		lseg = NULL;
871 	return lseg;
893 	/* If no lseg, fall back to read through mds */
918 	/* If no lseg, fall back to write through mds */
947 			       struct pnfs_layout_segment *lseg,
952 	struct nfs4_filelayout_segment *fl = FILELAYOUT_LSEG(lseg);
964 		j = nfs4_fl_calc_j_index(lseg, req_offset(req));
966 		pnfs_layout_mark_request_commit(req, lseg, cinfo, i);
970 static u32 calc_ds_index_from_commit(struct pnfs_layout_segment *lseg, u32 i)
972 	struct nfs4_filelayout_segment *flseg = FILELAYOUT_LSEG(lseg);
977 		return nfs4_fl_calc_ds_index(lseg, i);
981 select_ds_fh_from_commit(struct pnfs_layout_segment *lseg, u32 i)
983 	struct nfs4_filelayout_segment *flseg = FILELAYOUT_LSEG(lseg);
997 	struct pnfs_layout_segment *lseg = data->lseg;
1003 	idx = calc_ds_index_from_commit(lseg, data->ds_commit_index);
1004 	ds = nfs4_fl_prepare_ds(lseg, idx);
1017 	fh = select_ds_fh_from_commit(lseg, data->ds_commit_index);
1087 		struct pnfs_layout_segment *lseg)
1089 	struct nfs4_filelayout_segment *fl = FILELAYOUT_LSEG(lseg);
1090 	struct inode *inode = lseg->pls_layout->plh_inode;
1098 		array = pnfs_add_commit_array(fl_cinfo, new, lseg);