52 static bool is_hole(struct pnfs_block_extent *be)  in is_hole()  argument
54 	switch (be->be_state) {  in is_hole()
58 		return be->be_tag ? false : true;  in is_hole()
148 		struct pnfs_block_extent *be, bio_end_io_t end_io,  in do_add_page_to_bio()  argument
152 		container_of(be->be_device, struct pnfs_block_dev, node);  in do_add_page_to_bio()
159 	isect += be->be_v_offset;  in do_add_page_to_bio()
160 	isect -= be->be_f_offset;  in do_add_page_to_bio()
197 	struct pnfs_block_extent be;  in bl_mark_devices_unavailable()  local
203 		if (!ext_tree_lookup(bl, isect, &be, rw))  in bl_mark_devices_unavailable()
205 		extent_length = be.be_length - (isect - be.be_f_offset);  in bl_mark_devices_unavailable()
206 		nfs4_mark_deviceid_unavailable(be.be_device);  in bl_mark_devices_unavailable()
258 	struct pnfs_block_extent be;  in bl_read_pagelist()  local
289 			if (!ext_tree_lookup(bl, isect, &be, false)) {  in bl_read_pagelist()
293 			extent_length = be.be_length - (isect - be.be_f_offset);  in bl_read_pagelist()
306 		if (is_hole(&be)) {  in bl_read_pagelist()
318 						 isect, pages[i], &map, &be,  in bl_read_pagelist()
403 	struct pnfs_block_extent be;  in bl_write_pagelist()  local
436 			if (!ext_tree_lookup(bl, isect, &be, true)) {  in bl_write_pagelist()
441 			extent_length = be.be_length - (isect - be.be_f_offset);  in bl_write_pagelist()
446 					 WRITE, isect, pages[i], &map, &be,  in bl_write_pagelist()
529 static int verify_extent(struct pnfs_block_extent *be,  in verify_extent()  argument
533 		if (be->be_state == PNFS_BLOCK_READWRITE_DATA ||  in verify_extent()
534 		    be->be_state == PNFS_BLOCK_INVALID_DATA)  in verify_extent()
536 		if (be->be_f_offset != lv->start)  in verify_extent()
538 		lv->start += be->be_length;  in verify_extent()
542 	if (be->be_state == PNFS_BLOCK_READWRITE_DATA) {  in verify_extent()
543 		if (be->be_f_offset != lv->start)  in verify_extent()
547 		lv->start += be->be_length;  in verify_extent()
550 	} else if (be->be_state == PNFS_BLOCK_INVALID_DATA) {  in verify_extent()
551 		if (be->be_f_offset != lv->start)  in verify_extent()
553 		lv->start += be->be_length;  in verify_extent()
555 	} else if (be->be_state == PNFS_BLOCK_READ_DATA) {  in verify_extent()
556 		if (be->be_f_offset > lv->start)  in verify_extent()
558 		if (be->be_f_offset < lv->inval)  in verify_extent()
560 		if (be->be_f_offset < lv->cowread)  in verify_extent()
565 		lv->inval = lv->inval + be->be_length;  in verify_extent()
566 		lv->cowread = be->be_f_offset + be->be_length;  in verify_extent()
615 	struct pnfs_block_extent *be;  in bl_alloc_extent()  local
624 	be = kzalloc(sizeof(*be), GFP_NOFS);  in bl_alloc_extent()
625 	if (!be)  in bl_alloc_extent()
631 	be->be_device = bl_find_get_deviceid(NFS_SERVER(lo->plh_inode), &id,  in bl_alloc_extent()
633 	if (IS_ERR(be->be_device)) {  in bl_alloc_extent()
634 		error = PTR_ERR(be->be_device);  in bl_alloc_extent()
643 	if (decode_sector_number(&p, &be->be_f_offset) < 0)  in bl_alloc_extent()
645 	if (decode_sector_number(&p, &be->be_length) < 0)  in bl_alloc_extent()
647 	if (decode_sector_number(&p, &be->be_v_offset) < 0)  in bl_alloc_extent()
649 	be->be_state = be32_to_cpup(p++);  in bl_alloc_extent()
651 	error = verify_extent(be, lv);  in bl_alloc_extent()
657 	list_add_tail(&be->be_list, extents);  in bl_alloc_extent()
661 	nfs4_put_deviceid_node(be->be_device);  in bl_alloc_extent()
663 	kfree(be);  in bl_alloc_extent()
734 		struct pnfs_block_extent *be =  in bl_alloc_lseg()  local
737 		list_del(&be->be_list);  in bl_alloc_lseg()
740 			status = ext_tree_insert(bl, be);  in bl_alloc_lseg()
743 			nfs4_put_deviceid_node(be->be_device);  in bl_alloc_lseg()
744 			kfree(be);  in bl_alloc_lseg()