Lines Matching refs:lo
57 static void pnfs_layoutreturn_before_put_layout_hdr(struct pnfs_layout_hdr *lo);
58 static void pnfs_free_returned_lsegs(struct pnfs_layout_hdr *lo,
264 pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo)
266 refcount_inc(&lo->plh_refcount);
277 pnfs_free_layout_hdr(struct pnfs_layout_hdr *lo)
279 struct nfs_server *server = NFS_SERVER(lo->plh_inode);
282 if (test_and_clear_bit(NFS_LAYOUT_HASHED, &lo->plh_flags)) {
286 list_del_rcu(&lo->plh_layouts);
289 put_cred(lo->plh_lc_cred);
290 return ld->free_layout_hdr(lo);
294 pnfs_detach_layout_hdr(struct pnfs_layout_hdr *lo)
296 struct nfs_inode *nfsi = NFS_I(lo->plh_inode);
297 dprintk("%s: freeing layout cache %p\n", __func__, lo);
305 pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo)
310 if (!lo)
312 inode = lo->plh_inode;
313 pnfs_layoutreturn_before_put_layout_hdr(lo);
315 if (refcount_dec_and_lock(&lo->plh_refcount, &inode->i_lock)) {
316 if (!list_empty(&lo->plh_segs))
318 pnfs_detach_layout_hdr(lo);
321 pnfs_free_layout_hdr(lo);
324 wake_up_var(lo);
329 pnfs_grab_inode_layout_hdr(struct pnfs_layout_hdr *lo)
331 struct inode *inode = igrab(lo->plh_inode);
334 set_bit(NFS_LAYOUT_INODE_FREEING, &lo->plh_flags);
347 static void pnfs_barrier_update(struct pnfs_layout_hdr *lo, u32 newseq)
349 if (pnfs_seqid_is_newer(newseq, lo->plh_barrier) || !lo->plh_barrier)
350 lo->plh_barrier = newseq;
354 pnfs_set_plh_return_info(struct pnfs_layout_hdr *lo, enum pnfs_iomode iomode,
357 if (lo->plh_return_iomode != 0 && lo->plh_return_iomode != iomode)
359 lo->plh_return_iomode = iomode;
360 set_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags);
362 * We must set lo->plh_return_seq to avoid livelocks with
366 seq = be32_to_cpu(lo->plh_stateid.seqid);
367 if (!lo->plh_return_seq || pnfs_seqid_is_newer(seq, lo->plh_return_seq))
368 lo->plh_return_seq = seq;
369 pnfs_barrier_update(lo, seq);
373 pnfs_clear_layoutreturn_info(struct pnfs_layout_hdr *lo)
376 lo->plh_return_iomode = 0;
377 lo->plh_return_seq = 0;
378 clear_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags);
379 list_for_each_entry(lseg, &lo->plh_segs, pls_list) {
382 pnfs_set_plh_return_info(lo, lseg->pls_range.iomode, 0);
386 static void pnfs_clear_layoutreturn_waitbit(struct pnfs_layout_hdr *lo)
388 clear_bit_unlock(NFS_LAYOUT_RETURN, &lo->plh_flags);
389 clear_bit(NFS_LAYOUT_RETURN_LOCK, &lo->plh_flags);
391 wake_up_bit(&lo->plh_flags, NFS_LAYOUT_RETURN);
392 rpc_wake_up(&NFS_SERVER(lo->plh_inode)->roc_rpcwaitq);
415 struct pnfs_layout_hdr *lo;
426 lo = NFS_I(inode)->layout;
427 if (lo && pnfs_layout_is_valid(lo) &&
428 nfs4_stateid_match_other(dst, &lo->plh_stateid)) {
430 if (!nfs4_stateid_is_newer(&lo->plh_stateid, dst)) {
436 err = pnfs_mark_matching_lsegs_return(lo, &head, &range, 0);
438 dst->seqid = lo->plh_stateid.seqid;
457 pnfs_mark_layout_stateid_invalid(struct pnfs_layout_hdr *lo,
467 set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags);
468 list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list)
470 pnfs_clear_layoutreturn_info(lo);
471 pnfs_free_returned_lsegs(lo, lseg_list, &range, 0);
472 set_bit(NFS_LAYOUT_DRAIN, &lo->plh_flags);
473 if (test_bit(NFS_LAYOUT_RETURN, &lo->plh_flags) &&
474 !test_and_set_bit(NFS_LAYOUT_RETURN_LOCK, &lo->plh_flags))
475 pnfs_clear_layoutreturn_waitbit(lo);
476 return !list_empty(&lo->plh_segs);
487 pnfs_layout_set_fail_bit(struct pnfs_layout_hdr *lo, int fail_bit)
489 lo->plh_retry_timestamp = jiffies;
490 if (!test_and_set_bit(fail_bit, &lo->plh_flags))
491 refcount_inc(&lo->plh_refcount);
495 pnfs_layout_clear_fail_bit(struct pnfs_layout_hdr *lo, int fail_bit)
497 if (test_and_clear_bit(fail_bit, &lo->plh_flags))
498 refcount_dec(&lo->plh_refcount);
502 pnfs_layout_io_set_failed(struct pnfs_layout_hdr *lo, u32 iomode)
504 struct inode *inode = lo->plh_inode;
513 pnfs_layout_set_fail_bit(lo, pnfs_iomode_to_fail_bit(iomode));
514 pnfs_mark_matching_lsegs_invalid(lo, &head, &range, 0);
522 pnfs_layout_io_test_failed(struct pnfs_layout_hdr *lo, u32 iomode)
527 if (test_bit(fail_bit, &lo->plh_flags) == 0)
531 if (!time_in_range(lo->plh_retry_timestamp, start, end)) {
533 pnfs_layout_clear_fail_bit(lo, fail_bit);
540 pnfs_init_lseg(struct pnfs_layout_hdr *lo, struct pnfs_layout_segment *lseg,
549 lseg->pls_layout = lo;
563 pnfs_layout_remove_lseg(struct pnfs_layout_hdr *lo,
569 refcount_dec(&lo->plh_refcount);
572 if (list_empty(&lo->plh_segs) &&
573 !test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags) &&
574 !test_bit(NFS_LAYOUT_RETURN, &lo->plh_flags)) {
575 if (atomic_read(&lo->plh_outstanding) == 0)
576 set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags);
577 clear_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags);
582 pnfs_cache_lseg_for_layoutreturn(struct pnfs_layout_hdr *lo,
586 pnfs_layout_is_valid(lo)) {
587 pnfs_set_plh_return_info(lo, lseg->pls_range.iomode, 0);
588 list_move_tail(&lseg->pls_list, &lo->plh_return_segs);
597 struct pnfs_layout_hdr *lo;
607 lo = lseg->pls_layout;
608 inode = lo->plh_inode;
615 pnfs_get_layout_hdr(lo);
616 pnfs_layout_remove_lseg(lo, lseg);
617 if (pnfs_cache_lseg_for_layoutreturn(lo, lseg))
621 pnfs_put_layout_hdr(lo);
697 * @lo: layout header containing the lsegs
711 pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo,
719 dprintk("%s:Begin lo %p\n", __func__, lo);
721 if (list_empty(&lo->plh_segs))
723 list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list)
737 pnfs_free_returned_lsegs(struct pnfs_layout_hdr *lo,
744 list_for_each_entry_safe(lseg, next, &lo->plh_return_segs, pls_list) {
767 struct pnfs_layout_hdr *lo;
771 lo = nfsi->layout;
772 if (lo) {
773 pnfs_get_layout_hdr(lo);
774 pnfs_mark_layout_stateid_invalid(lo, &tmp_list);
775 pnfs_layout_clear_fail_bit(lo, NFS_LAYOUT_RO_FAILED);
776 pnfs_layout_clear_fail_bit(lo, NFS_LAYOUT_RW_FAILED);
780 pnfs_put_layout_hdr(lo);
783 return lo;
793 struct pnfs_layout_hdr *lo)
798 ret = nfsi->layout != lo;
805 struct pnfs_layout_hdr *lo = __pnfs_destroy_layout(nfsi);
807 if (lo)
808 wait_var_event(lo, pnfs_layout_removed(nfsi, lo));
815 struct pnfs_layout_hdr *lo;
819 lo = NFS_I(inode)->layout;
820 if (lo != NULL && list_empty(&lo->plh_bulk_destroy)) {
821 pnfs_get_layout_hdr(lo);
822 list_add(&lo->plh_bulk_destroy, layout_list);
837 struct pnfs_layout_hdr *lo, *next;
840 list_for_each_entry_safe(lo, next, &server->layouts, plh_layouts) {
841 if (test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) ||
842 test_bit(NFS_LAYOUT_INODE_FREEING, &lo->plh_flags) ||
843 !list_empty(&lo->plh_bulk_destroy))
848 inode = pnfs_grab_inode_layout_hdr(lo);
850 if (test_and_clear_bit(NFS_LAYOUT_HASHED, &lo->plh_flags))
851 list_del_rcu(&lo->plh_layouts);
874 struct pnfs_layout_hdr *lo;
880 lo = list_entry(layout_list->next, struct pnfs_layout_hdr,
883 lo->plh_inode->i_ino);
884 inode = lo->plh_inode;
889 list_del_init(&lo->plh_bulk_destroy);
890 if (pnfs_mark_layout_stateid_invalid(lo, &lseg_list)) {
892 set_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags);
899 pnfs_put_layout_hdr(lo);
970 pnfs_set_layout_cred(struct pnfs_layout_hdr *lo, const struct cred *cred)
974 if (cred && cred_fscmp(lo->plh_lc_cred, cred) != 0) {
975 old = xchg(&lo->plh_lc_cred, get_cred(cred));
980 /* update lo->plh_stateid with new if is more recent */
982 pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, const nfs4_stateid *new,
985 u32 oldseq = be32_to_cpu(lo->plh_stateid.seqid);
988 if (!pnfs_layout_is_valid(lo)) {
989 pnfs_set_layout_cred(lo, cred);
990 nfs4_stateid_copy(&lo->plh_stateid, new);
991 lo->plh_barrier = newseq;
992 pnfs_clear_layoutreturn_info(lo);
993 clear_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags);
998 nfs4_stateid_copy(&lo->plh_stateid, new);
1001 pnfs_barrier_update(lo, newseq);
1009 if (atomic_read(&lo->plh_outstanding) == 1)
1010 pnfs_barrier_update(lo, be32_to_cpu(lo->plh_stateid.seqid));
1014 pnfs_layout_stateid_blocked(const struct pnfs_layout_hdr *lo,
1019 return lo->plh_barrier && pnfs_seqid_is_newer(lo->plh_barrier, seqid);
1024 pnfs_layoutgets_blocked(const struct pnfs_layout_hdr *lo)
1026 return lo->plh_block_lgets ||
1027 test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags);
1168 void pnfs_layoutreturn_free_lsegs(struct pnfs_layout_hdr *lo,
1173 struct inode *inode = lo->plh_inode;
1177 if (!pnfs_layout_is_valid(lo) || !arg_stateid ||
1178 !nfs4_stateid_match_other(&lo->plh_stateid, arg_stateid))
1183 pnfs_mark_matching_lsegs_invalid(lo, &freeme, range, seq);
1184 pnfs_free_returned_lsegs(lo, &freeme, range, seq);
1185 pnfs_set_layout_stateid(lo, stateid, NULL, true);
1187 pnfs_mark_layout_stateid_invalid(lo, &freeme);
1189 pnfs_clear_layoutreturn_waitbit(lo);
1196 pnfs_prepare_layoutreturn(struct pnfs_layout_hdr *lo,
1202 if (atomic_read(&lo->plh_outstanding) != 0)
1204 if (test_and_set_bit(NFS_LAYOUT_RETURN_LOCK, &lo->plh_flags))
1206 set_bit(NFS_LAYOUT_RETURN, &lo->plh_flags);
1207 pnfs_get_layout_hdr(lo);
1208 nfs4_stateid_copy(stateid, &lo->plh_stateid);
1209 *cred = get_cred(lo->plh_lc_cred);
1210 if (test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags)) {
1211 if (lo->plh_return_seq != 0)
1212 stateid->seqid = cpu_to_be32(lo->plh_return_seq);
1214 *iomode = lo->plh_return_iomode;
1215 pnfs_clear_layoutreturn_info(lo);
1218 pnfs_barrier_update(lo, be32_to_cpu(stateid->seqid));
1224 struct pnfs_layout_hdr *lo,
1228 struct inode *inode = lo->plh_inode;
1235 args->layout = lo;
1240 pnfs_send_layoutreturn(struct pnfs_layout_hdr *lo,
1246 struct inode *ino = lo->plh_inode;
1257 pnfs_clear_layoutreturn_waitbit(lo);
1260 pnfs_put_layout_hdr(lo);
1264 pnfs_init_layoutreturn_args(&lrp->args, lo, stateid, iomode);
1278 pnfs_layout_segments_returnable(struct pnfs_layout_hdr *lo,
1286 return pnfs_mark_matching_lsegs_return(lo, &lo->plh_return_segs,
1292 pnfs_layout_need_return(struct pnfs_layout_hdr *lo)
1294 if (!test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags))
1296 return pnfs_layout_segments_returnable(lo, lo->plh_return_iomode,
1297 lo->plh_return_seq);
1300 static void pnfs_layoutreturn_before_put_layout_hdr(struct pnfs_layout_hdr *lo)
1302 struct inode *inode= lo->plh_inode;
1304 if (!test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags))
1307 if (pnfs_layout_need_return(lo)) {
1313 send = pnfs_prepare_layoutreturn(lo, &stateid, &cred, &iomode);
1317 pnfs_send_layoutreturn(lo, &stateid, &cred, iomode, false);
1334 struct pnfs_layout_hdr *lo = NULL;
1350 lo = nfsi->layout;
1351 if (!lo) {
1357 pnfs_get_layout_hdr(lo);
1359 if (test_bit(NFS_LAYOUT_RETURN_LOCK, &lo->plh_flags)) {
1361 if (wait_on_bit(&lo->plh_flags, NFS_LAYOUT_RETURN,
1366 valid_layout = pnfs_layout_is_valid(lo);
1368 pnfs_mark_matching_lsegs_return(lo, &tmp_list, &range, 0);
1371 NFS_SERVER(ino)->pnfs_curr_ld->return_range(lo, &range);
1374 if (!test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags) ||
1381 send = pnfs_prepare_layoutreturn(lo, &stateid, &cred, NULL);
1384 status = pnfs_send_layoutreturn(lo, &stateid, &cred, IOMODE_ANY, true);
1386 wait_on_bit(&lo->plh_flags, NFS_LAYOUT_RETURN, TASK_UNINTERRUPTIBLE);
1389 pnfs_put_layout_hdr(lo);
1398 struct pnfs_layout_hdr *lo;
1402 lo = NFS_I(inode)->layout;
1403 if (lo == NULL) {
1407 pnfs_get_layout_hdr(lo);
1409 lo->plh_block_lgets++;
1416 lo->plh_block_lgets--;
1418 pnfs_put_layout_hdr(lo);
1430 struct pnfs_layout_hdr *lo;
1443 lo = nfsi->layout;
1444 if (!lo || !pnfs_layout_is_valid(lo) ||
1445 test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) {
1446 lo = NULL;
1449 pnfs_get_layout_hdr(lo);
1450 if (test_bit(NFS_LAYOUT_RETURN_LOCK, &lo->plh_flags)) {
1453 wait_on_bit(&lo->plh_flags, NFS_LAYOUT_RETURN,
1455 pnfs_put_layout_hdr(lo);
1478 list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list) {
1489 if (!mark_lseg_invalid(lseg, &lo->plh_return_segs))
1491 pnfs_set_plh_return_info(lo, lseg->pls_range.iomode, 0);
1494 if (!test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags))
1501 /* lo ref dropped in pnfs_roc_release() */
1502 layoutreturn = pnfs_prepare_layoutreturn(lo, &stateid, &lc_cred, &iomode);
1508 pnfs_init_layoutreturn_args(args, lo, &stateid, iomode);
1521 pnfs_put_layout_hdr(lo);
1525 pnfs_send_layoutreturn(lo, &stateid, &lc_cred, iomode, true);
1526 pnfs_put_layout_hdr(lo);
1578 struct pnfs_layout_hdr *lo = args->layout;
1587 if (pnfs_layout_is_valid(lo) &&
1588 nfs4_stateid_match_other(&args->stateid, &lo->plh_stateid))
1589 pnfs_set_plh_return_info(lo, args->range.iomode, 0);
1600 pnfs_layoutreturn_free_lsegs(lo, arg_stateid, &args->range,
1604 pnfs_put_layout_hdr(lo);
1610 struct pnfs_layout_hdr *lo;
1613 /* we might not have grabbed lo reference. so need to check under
1616 lo = nfsi->layout;
1617 if (lo && test_bit(NFS_LAYOUT_RETURN, &lo->plh_flags)) {
1665 pnfs_generic_layout_insert_lseg(struct pnfs_layout_hdr *lo,
1677 list_for_each_entry_safe(lp, tmp, &lo->plh_segs, pls_list) {
1696 list_add_tail(&lseg->pls_list, &lo->plh_segs);
1702 pnfs_get_layout_hdr(lo);
1709 pnfs_layout_insert_lseg(struct pnfs_layout_hdr *lo,
1713 struct inode *inode = lo->plh_inode;
1717 ld->add_lseg(lo, lseg, free_me);
1719 pnfs_generic_layout_insert_lseg(lo, lseg,
1730 struct pnfs_layout_hdr *lo;
1732 lo = pnfs_alloc_layout_hdr(ino, gfp_flags);
1733 if (!lo)
1735 refcount_set(&lo->plh_refcount, 1);
1736 INIT_LIST_HEAD(&lo->plh_layouts);
1737 INIT_LIST_HEAD(&lo->plh_segs);
1738 INIT_LIST_HEAD(&lo->plh_return_segs);
1739 INIT_LIST_HEAD(&lo->plh_bulk_destroy);
1740 lo->plh_inode = ino;
1741 lo->plh_lc_cred = get_cred(ctx->cred);
1742 lo->plh_flags |= 1 << NFS_LAYOUT_INVALID_STID;
1743 return lo;
1811 pnfs_find_lseg(struct pnfs_layout_hdr *lo,
1819 list_for_each_entry(lseg, &lo->plh_segs, pls_list) {
1908 static int pnfs_prepare_to_retry_layoutget(struct pnfs_layout_hdr *lo)
1914 pnfs_layoutcommit_inode(lo->plh_inode, false);
1915 return wait_on_bit_action(&lo->plh_flags, NFS_LAYOUT_RETURN,
1920 static void nfs_layoutget_begin(struct pnfs_layout_hdr *lo)
1922 atomic_inc(&lo->plh_outstanding);
1925 static void nfs_layoutget_end(struct pnfs_layout_hdr *lo)
1927 if (atomic_dec_and_test(&lo->plh_outstanding) &&
1928 test_and_clear_bit(NFS_LAYOUT_DRAIN, &lo->plh_flags))
1929 wake_up_bit(&lo->plh_flags, NFS_LAYOUT_DRAIN);
1932 static bool pnfs_is_first_layoutget(struct pnfs_layout_hdr *lo)
1934 return test_bit(NFS_LAYOUT_FIRST_LAYOUTGET, &lo->plh_flags);
1937 static void pnfs_clear_first_layoutget(struct pnfs_layout_hdr *lo)
1939 unsigned long *bitlock = &lo->plh_flags;
1946 static void _add_to_server_list(struct pnfs_layout_hdr *lo,
1949 if (!test_and_set_bit(NFS_LAYOUT_HASHED, &lo->plh_flags)) {
1952 /* The lo must be on the clp list if there is any
1956 list_add_tail_rcu(&lo->plh_layouts, &server->layouts);
1982 struct pnfs_layout_hdr *lo = NULL;
1991 trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg,
1997 trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg,
2008 lo = pnfs_find_alloc_layout(ino, ctx, gfp_flags);
2009 if (lo == NULL) {
2012 trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg,
2018 if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) {
2019 trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg,
2026 if (pnfs_layout_io_test_failed(lo, iomode)) {
2027 trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg,
2036 if (test_bit(NFS_LAYOUT_DRAIN, &lo->plh_flags) &&
2037 atomic_read(&lo->plh_outstanding) != 0) {
2039 lseg = ERR_PTR(wait_on_bit(&lo->plh_flags, NFS_LAYOUT_DRAIN,
2043 pnfs_put_layout_hdr(lo);
2051 if (test_bit(NFS_LAYOUT_RETURN, &lo->plh_flags)) {
2054 lseg = ERR_PTR(pnfs_prepare_to_retry_layoutget(lo));
2056 pnfs_put_layout_hdr(lo);
2058 trace_pnfs_update_layout(ino, pos, count, iomode, lo,
2063 trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg,
2068 lseg = pnfs_find_lseg(lo, &arg, strict_iomode);
2070 trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg,
2080 if (test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags)) {
2088 &lo->plh_flags)) {
2090 lseg = ERR_PTR(wait_on_bit(&lo->plh_flags,
2095 pnfs_put_layout_hdr(lo);
2108 iomode, lo, lseg,
2111 pnfs_clear_first_layoutget(lo);
2112 pnfs_put_layout_hdr(lo);
2117 nfs4_stateid_copy(&stateid, &lo->plh_stateid);
2120 if (pnfs_layoutgets_blocked(lo)) {
2121 trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg,
2125 nfs_layoutget_begin(lo);
2128 _add_to_server_list(lo, server);
2141 trace_pnfs_update_layout(ino, pos, count, iomode, lo, NULL,
2143 nfs_layoutget_end(lo);
2148 trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg,
2150 nfs_layoutget_end(lo);
2163 lo, pnfs_iomode_to_fail_bit(iomode));
2168 pnfs_layout_clear_fail_bit(lo, pnfs_iomode_to_fail_bit(iomode));
2175 pnfs_clear_first_layoutget(lo);
2177 iomode, lo, lseg, PNFS_UPDATE_LAYOUT_RETRY);
2178 pnfs_put_layout_hdr(lo);
2182 pnfs_layout_clear_fail_bit(lo, pnfs_iomode_to_fail_bit(iomode));
2187 pnfs_clear_first_layoutget(lo);
2188 trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg,
2190 pnfs_put_layout_hdr(lo);
2230 struct pnfs_layout_hdr *lo;
2233 lo = pnfs_find_alloc_layout(ino, ctx, GFP_KERNEL);
2234 if (!lo)
2236 if (!test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags))
2238 if (test_bit(NFS_LAYOUT_RETURN, &lo->plh_flags))
2240 if (pnfs_layoutgets_blocked(lo))
2242 if (test_and_set_bit(NFS_LAYOUT_FIRST_LAYOUTGET, &lo->plh_flags))
2244 nfs_layoutget_begin(lo);
2246 _add_to_server_list(lo, NFS_SERVER(ino));
2247 return lo;
2251 pnfs_put_layout_hdr(lo);
2266 struct pnfs_layout_hdr *lo;
2273 lo = _pnfs_grab_empty_layout(ino, ctx);
2274 if (!lo)
2279 pnfs_clear_first_layoutget(lo);
2280 nfs_layoutget_end(lo);
2281 pnfs_put_layout_hdr(lo);
2329 struct pnfs_layout_hdr *lo;
2360 lo = _pnfs_grab_empty_layout(ino, ctx);
2361 if (!lo)
2365 lo = NFS_I(lgp->args.inode)->layout;
2370 pnfs_layout_clear_fail_bit(lo, pnfs_iomode_to_fail_bit(iomode));
2380 struct pnfs_layout_hdr *lo = NFS_I(inode)->layout;
2381 pnfs_clear_first_layoutget(lo);
2382 nfs_layoutget_end(lo);
2391 struct pnfs_layout_hdr *lo = NFS_I(lgp->args.inode)->layout;
2394 struct inode *ino = lo->plh_inode;
2401 lseg = NFS_SERVER(ino)->pnfs_curr_ld->alloc_lseg(lo, res, lgp->gfp_flags);
2411 pnfs_init_lseg(lo, lseg, &res->range, &res->stateid);
2414 if (pnfs_layoutgets_blocked(lo)) {
2419 if (test_bit(NFS_LAYOUT_DRAIN, &lo->plh_flags) &&
2420 !pnfs_is_first_layoutget(lo))
2423 if (nfs4_stateid_match_other(&lo->plh_stateid, &res->stateid)) {
2425 if (pnfs_layout_stateid_blocked(lo, &res->stateid)) {
2426 if (!pnfs_layout_is_valid(lo))
2427 lo->plh_barrier = 0;
2431 pnfs_set_layout_stateid(lo, &res->stateid, lgp->cred, false);
2432 } else if (pnfs_layout_is_valid(lo)) {
2441 pnfs_set_plh_return_info(lo, IOMODE_ANY, 0);
2442 pnfs_mark_matching_lsegs_return(lo, &lo->plh_return_segs,
2447 pnfs_set_layout_stateid(lo, &res->stateid, lgp->cred, true);
2451 pnfs_layout_insert_lseg(lo, lseg, &free_me);
2463 lseg->pls_layout = lo;
2471 * @lo: pointer to layout header
2486 pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo,
2494 dprintk("%s:Begin lo %p\n", __func__, lo);
2496 assert_spin_locked(&lo->plh_inode->i_lock);
2498 if (test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags))
2499 tmp_list = &lo->plh_return_segs;
2501 list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list)
2509 tmp_list = &lo->plh_return_segs;
2517 pnfs_set_plh_return_info(lo, return_range->iomode, seq);
2521 if (!list_empty(&lo->plh_return_segs)) {
2522 pnfs_set_plh_return_info(lo, return_range->iomode, seq);
2533 struct pnfs_layout_hdr *lo;
2537 lo = NFS_I(inode)->layout;
2538 if (!pnfs_layout_is_valid(lo)) {
2542 pnfs_set_plh_return_info(lo, range->iomode, 0);
2548 if (pnfs_mark_matching_lsegs_return(lo, &lo->plh_return_segs, range, 0) != -EBUSY) {
2553 return_now = pnfs_prepare_layoutreturn(lo, &stateid, &cred, &iomode);
2556 pnfs_send_layoutreturn(lo, &stateid, &cred, iomode, false);
2577 pnfs_layout_can_be_returned(struct pnfs_layout_hdr *lo)
2579 return pnfs_layout_is_valid(lo) &&
2580 !test_bit(NFS_LAYOUT_INODE_FREEING, &lo->plh_flags) &&
2581 !test_bit(NFS_LAYOUT_RETURN, &lo->plh_flags);
2585 pnfs_find_first_lseg(struct pnfs_layout_hdr *lo,
2591 list_for_each_entry(lseg, &lo->plh_segs, pls_list) {
2606 pnfs_should_return_unused_layout(struct pnfs_layout_hdr *lo,
2613 if (!pnfs_layout_can_be_returned(lo) ||
2614 !pnfs_find_first_lseg(lo, range, range->iomode))
2617 head = &NFS_I(lo->plh_inode)->open_files;
2630 if (pnfs_find_first_lseg(lo, range, IOMODE_READ))
2641 struct pnfs_layout_hdr *lo;
2648 list_for_each_entry_rcu(lo, &server->layouts, plh_layouts) {
2649 inode = lo->plh_inode;
2650 if (!inode || !pnfs_layout_can_be_returned(lo) ||
2651 test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags))
2654 if (!lo->plh_inode ||
2655 !pnfs_should_return_unused_layout(lo, range)) {
2659 pnfs_get_layout_hdr(lo);
2660 pnfs_set_plh_return_info(lo, range->iomode, 0);
2661 if (pnfs_mark_matching_lsegs_return(lo, &lo->plh_return_segs,
2663 !pnfs_prepare_layoutreturn(lo, &stateid, &cred, &iomode)) {
2666 pnfs_put_layout_hdr(lo);
2672 pnfs_send_layoutreturn(lo, &stateid, &cred, iomode, false);
2673 pnfs_put_layout_hdr(lo);