Lines Matching full:delegation
3 * linux/fs/nfs/delegation.c
7 * NFS file delegation management
24 #include "delegation.h"
33 static void __nfs_free_delegation(struct nfs_delegation *delegation) in __nfs_free_delegation() argument
35 put_cred(delegation->cred); in __nfs_free_delegation()
36 delegation->cred = NULL; in __nfs_free_delegation()
37 kfree_rcu(delegation, rcu); in __nfs_free_delegation()
40 static void nfs_mark_delegation_revoked(struct nfs_delegation *delegation) in nfs_mark_delegation_revoked() argument
42 if (!test_and_set_bit(NFS_DELEGATION_REVOKED, &delegation->flags)) { in nfs_mark_delegation_revoked()
43 delegation->stateid.type = NFS4_INVALID_STATEID_TYPE; in nfs_mark_delegation_revoked()
45 if (!test_bit(NFS_DELEGATION_RETURNING, &delegation->flags)) in nfs_mark_delegation_revoked()
46 nfs_clear_verifier_delegated(delegation->inode); in nfs_mark_delegation_revoked()
50 static struct nfs_delegation *nfs_get_delegation(struct nfs_delegation *delegation) in nfs_get_delegation() argument
52 refcount_inc(&delegation->refcount); in nfs_get_delegation()
53 return delegation; in nfs_get_delegation()
56 static void nfs_put_delegation(struct nfs_delegation *delegation) in nfs_put_delegation() argument
58 if (refcount_dec_and_test(&delegation->refcount)) in nfs_put_delegation()
59 __nfs_free_delegation(delegation); in nfs_put_delegation()
62 static void nfs_free_delegation(struct nfs_delegation *delegation) in nfs_free_delegation() argument
64 nfs_mark_delegation_revoked(delegation); in nfs_free_delegation()
65 nfs_put_delegation(delegation); in nfs_free_delegation()
69 * nfs_mark_delegation_referenced - set delegation's REFERENCED flag
70 * @delegation: delegation to process
73 void nfs_mark_delegation_referenced(struct nfs_delegation *delegation) in nfs_mark_delegation_referenced() argument
75 set_bit(NFS_DELEGATION_REFERENCED, &delegation->flags); in nfs_mark_delegation_referenced()
79 struct nfs_delegation *delegation) in nfs_mark_return_delegation() argument
81 set_bit(NFS_DELEGATION_RETURN, &delegation->flags); in nfs_mark_return_delegation()
86 static bool nfs4_is_valid_delegation(const struct nfs_delegation *delegation, in nfs4_is_valid_delegation() argument
89 if (delegation != NULL && (delegation->type & type) == type && in nfs4_is_valid_delegation()
90 !test_bit(NFS_DELEGATION_REVOKED, &delegation->flags) && in nfs4_is_valid_delegation()
91 !test_bit(NFS_DELEGATION_RETURNING, &delegation->flags)) in nfs4_is_valid_delegation()
98 struct nfs_delegation *delegation; in nfs4_get_valid_delegation() local
100 delegation = rcu_dereference(NFS_I(inode)->delegation); in nfs4_get_valid_delegation()
101 if (nfs4_is_valid_delegation(delegation, 0)) in nfs4_get_valid_delegation()
102 return delegation; in nfs4_get_valid_delegation()
109 struct nfs_delegation *delegation; in nfs4_do_check_delegation() local
114 delegation = rcu_dereference(NFS_I(inode)->delegation); in nfs4_do_check_delegation()
115 if (nfs4_is_valid_delegation(delegation, type)) { in nfs4_do_check_delegation()
117 nfs_mark_delegation_referenced(delegation); in nfs4_do_check_delegation()
120 !test_bit(NFS_DELEGATION_DELEGTIME, &delegation->flags)) in nfs4_do_check_delegation()
127 * nfs4_have_delegation - check if inode has a delegation, mark it
130 * @type: delegation types to check for
133 * Returns one if inode has the indicated delegation, otherwise zero.
141 * nfs4_check_delegation - check if inode has a delegation, do not mark
222 * nfs_inode_reclaim_delegation - process a delegation reclaim request
225 * @type: delegation type
226 * @stateid: delegation stateid
227 * @pagemod_limit: write delegation "space_limit"
228 * @deleg_type: raw delegation type
235 struct nfs_delegation *delegation; in nfs_inode_reclaim_delegation() local
239 delegation = rcu_dereference(NFS_I(inode)->delegation); in nfs_inode_reclaim_delegation()
240 if (delegation != NULL) { in nfs_inode_reclaim_delegation()
241 spin_lock(&delegation->lock); in nfs_inode_reclaim_delegation()
242 nfs4_stateid_copy(&delegation->stateid, stateid); in nfs_inode_reclaim_delegation()
243 delegation->type = type; in nfs_inode_reclaim_delegation()
244 delegation->pagemod_limit = pagemod_limit; in nfs_inode_reclaim_delegation()
245 oldcred = delegation->cred; in nfs_inode_reclaim_delegation()
246 delegation->cred = get_cred(cred); in nfs_inode_reclaim_delegation()
250 set_bit(NFS_DELEGATION_DELEGTIME, &delegation->flags); in nfs_inode_reclaim_delegation()
253 clear_bit(NFS_DELEGATION_DELEGTIME, &delegation->flags); in nfs_inode_reclaim_delegation()
255 clear_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags); in nfs_inode_reclaim_delegation()
257 &delegation->flags)) in nfs_inode_reclaim_delegation()
259 spin_unlock(&delegation->lock); in nfs_inode_reclaim_delegation()
271 struct nfs_delegation *delegation, in nfs_do_return_delegation() argument
277 if (!test_bit(NFS_DELEGATION_REVOKED, &delegation->flags)) { in nfs_do_return_delegation()
278 spin_lock(&delegation->lock); in nfs_do_return_delegation()
279 cred = get_cred(delegation->cred); in nfs_do_return_delegation()
280 spin_unlock(&delegation->lock); in nfs_do_return_delegation()
281 res = nfs4_proc_delegreturn(inode, cred, &delegation->stateid, in nfs_do_return_delegation()
282 delegation, issync); in nfs_do_return_delegation()
288 static struct inode *nfs_delegation_grab_inode(struct nfs_delegation *delegation) in nfs_delegation_grab_inode() argument
292 spin_lock(&delegation->lock); in nfs_delegation_grab_inode()
293 if (delegation->inode != NULL) in nfs_delegation_grab_inode()
294 inode = igrab(delegation->inode); in nfs_delegation_grab_inode()
296 set_bit(NFS_DELEGATION_INODE_FREEING, &delegation->flags); in nfs_delegation_grab_inode()
297 spin_unlock(&delegation->lock); in nfs_delegation_grab_inode()
305 struct nfs_delegation *delegation = rcu_dereference(nfsi->delegation); in nfs_start_delegation_return_locked() local
307 if (delegation == NULL) in nfs_start_delegation_return_locked()
309 spin_lock(&delegation->lock); in nfs_start_delegation_return_locked()
310 if (!test_and_set_bit(NFS_DELEGATION_RETURNING, &delegation->flags)) { in nfs_start_delegation_return_locked()
311 clear_bit(NFS_DELEGATION_RETURN_DELAYED, &delegation->flags); in nfs_start_delegation_return_locked()
313 ret = nfs_get_delegation(delegation); in nfs_start_delegation_return_locked()
315 spin_unlock(&delegation->lock); in nfs_start_delegation_return_locked()
325 struct nfs_delegation *delegation; in nfs_start_delegation_return() local
328 delegation = nfs_start_delegation_return_locked(nfsi); in nfs_start_delegation_return()
330 return delegation; in nfs_start_delegation_return()
333 static void nfs_abort_delegation_return(struct nfs_delegation *delegation, in nfs_abort_delegation_return() argument
336 spin_lock(&delegation->lock); in nfs_abort_delegation_return()
337 clear_bit(NFS_DELEGATION_RETURNING, &delegation->flags); in nfs_abort_delegation_return()
339 set_bit(NFS_DELEGATION_RETURN_DELAYED, &delegation->flags); in nfs_abort_delegation_return()
345 spin_unlock(&delegation->lock); in nfs_abort_delegation_return()
350 struct nfs_delegation *delegation, in nfs_detach_delegation_locked() argument
354 rcu_dereference_protected(nfsi->delegation, in nfs_detach_delegation_locked()
357 if (deleg_cur == NULL || delegation != deleg_cur) in nfs_detach_delegation_locked()
360 spin_lock(&delegation->lock); in nfs_detach_delegation_locked()
361 if (!delegation->inode) { in nfs_detach_delegation_locked()
362 spin_unlock(&delegation->lock); in nfs_detach_delegation_locked()
365 list_del_rcu(&delegation->super_list); in nfs_detach_delegation_locked()
366 delegation->inode = NULL; in nfs_detach_delegation_locked()
367 rcu_assign_pointer(nfsi->delegation, NULL); in nfs_detach_delegation_locked()
368 spin_unlock(&delegation->lock); in nfs_detach_delegation_locked()
369 return delegation; in nfs_detach_delegation_locked()
373 struct nfs_delegation *delegation, in nfs_detach_delegation() argument
379 delegation = nfs_detach_delegation_locked(nfsi, delegation, clp); in nfs_detach_delegation()
381 return delegation; in nfs_detach_delegation()
389 struct nfs_delegation *delegation; in nfs_inode_detach_delegation() local
392 delegation = rcu_dereference(nfsi->delegation); in nfs_inode_detach_delegation()
393 if (delegation != NULL) in nfs_inode_detach_delegation()
394 delegation = nfs_detach_delegation(nfsi, delegation, server); in nfs_inode_detach_delegation()
396 return delegation; in nfs_inode_detach_delegation()
400 nfs_update_delegation_cred(struct nfs_delegation *delegation, in nfs_update_delegation_cred() argument
405 if (cred_fscmp(delegation->cred, cred) != 0) { in nfs_update_delegation_cred()
406 old = xchg(&delegation->cred, get_cred(cred)); in nfs_update_delegation_cred()
412 nfs_update_inplace_delegation(struct nfs_delegation *delegation, in nfs_update_inplace_delegation() argument
415 if (nfs4_stateid_is_newer(&update->stateid, &delegation->stateid)) { in nfs_update_inplace_delegation()
416 delegation->stateid.seqid = update->stateid.seqid; in nfs_update_inplace_delegation()
418 delegation->type = update->type; in nfs_update_inplace_delegation()
419 delegation->pagemod_limit = update->pagemod_limit; in nfs_update_inplace_delegation()
420 if (test_bit(NFS_DELEGATION_REVOKED, &delegation->flags)) { in nfs_update_inplace_delegation()
421 delegation->change_attr = update->change_attr; in nfs_update_inplace_delegation()
422 nfs_update_delegation_cred(delegation, update->cred); in nfs_update_inplace_delegation()
424 clear_bit(NFS_DELEGATION_REVOKED, &delegation->flags); in nfs_update_inplace_delegation()
431 * nfs_inode_set_delegation - set up a delegation on an inode
432 * @inode: inode to which delegation applies
433 * @cred: cred to use for subsequent delegation processing
434 * @type: delegation type
435 * @stateid: delegation stateid
436 * @pagemod_limit: write delegation "space_limit"
437 * @deleg_type: raw delegation type
448 struct nfs_delegation *delegation, *old_delegation; in nfs_inode_set_delegation() local
452 delegation = kmalloc(sizeof(*delegation), GFP_KERNEL_ACCOUNT); in nfs_inode_set_delegation()
453 if (delegation == NULL) in nfs_inode_set_delegation()
455 nfs4_stateid_copy(&delegation->stateid, stateid); in nfs_inode_set_delegation()
456 refcount_set(&delegation->refcount, 1); in nfs_inode_set_delegation()
457 delegation->type = type; in nfs_inode_set_delegation()
458 delegation->pagemod_limit = pagemod_limit; in nfs_inode_set_delegation()
459 delegation->change_attr = inode_peek_iversion_raw(inode); in nfs_inode_set_delegation()
460 delegation->cred = get_cred(cred); in nfs_inode_set_delegation()
461 delegation->inode = inode; in nfs_inode_set_delegation()
462 delegation->flags = 1<<NFS_DELEGATION_REFERENCED; in nfs_inode_set_delegation()
466 delegation->flags |= BIT(NFS_DELEGATION_DELEGTIME); in nfs_inode_set_delegation()
468 delegation->test_gen = 0; in nfs_inode_set_delegation()
469 spin_lock_init(&delegation->lock); in nfs_inode_set_delegation()
472 old_delegation = rcu_dereference_protected(nfsi->delegation, in nfs_inode_set_delegation()
476 /* Is this an update of the existing delegation? */ in nfs_inode_set_delegation()
478 &delegation->stateid)) { in nfs_inode_set_delegation()
481 delegation); in nfs_inode_set_delegation()
489 * Allow for upgrades to a WRITE delegation, but in nfs_inode_set_delegation()
493 "a duplicate delegation!\n", in nfs_inode_set_delegation()
495 if (delegation->type == old_delegation->type || in nfs_inode_set_delegation()
496 !(delegation->type & FMODE_WRITE)) { in nfs_inode_set_delegation()
497 freeme = delegation; in nfs_inode_set_delegation()
498 delegation = NULL; in nfs_inode_set_delegation()
511 * the delegation, then pre-emptively ask for a full attribute in nfs_inode_set_delegation()
525 list_add_tail_rcu(&delegation->super_list, &server->delegations); in nfs_inode_set_delegation()
526 rcu_assign_pointer(nfsi->delegation, delegation); in nfs_inode_set_delegation()
527 delegation = NULL; in nfs_inode_set_delegation()
539 if (delegation != NULL) in nfs_inode_set_delegation()
540 __nfs_free_delegation(delegation); in nfs_inode_set_delegation()
549 * Basic procedure for returning a delegation to the server
551 static int nfs_end_delegation_return(struct inode *inode, struct nfs_delegation *delegation, int is… in nfs_end_delegation_return() argument
557 if (delegation == NULL) in nfs_end_delegation_return()
566 if (test_bit(NFS_DELEGATION_REVOKED, &delegation->flags)) in nfs_end_delegation_return()
568 err = nfs_delegation_claim_opens(inode, &delegation->stateid, in nfs_end_delegation_return()
569 delegation->type); in nfs_end_delegation_return()
579 nfs_abort_delegation_return(delegation, server, err); in nfs_end_delegation_return()
583 err = nfs_do_return_delegation(inode, delegation, issync); in nfs_end_delegation_return()
586 nfs_put_delegation(delegation); in nfs_end_delegation_return()
590 static bool nfs_delegation_need_return(struct nfs_delegation *delegation) in nfs_delegation_need_return() argument
594 if (test_and_clear_bit(NFS_DELEGATION_RETURN, &delegation->flags)) in nfs_delegation_need_return()
596 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags) || in nfs_delegation_need_return()
597 test_bit(NFS_DELEGATION_RETURN_DELAYED, &delegation->flags) || in nfs_delegation_need_return()
598 test_bit(NFS_DELEGATION_REVOKED, &delegation->flags)) in nfs_delegation_need_return()
607 struct nfs_delegation *delegation; in nfs_server_return_marked_delegations() local
621 * list delegation in the server from the delegations in nfs_server_return_marked_delegations()
623 * prev is an RCU-protected pointer to a delegation which in nfs_server_return_marked_delegations()
628 delegation = NULL; in nfs_server_return_marked_delegations()
631 delegation = rcu_dereference(NFS_I(place_holder)->delegation); in nfs_server_return_marked_delegations()
632 if (!delegation || delegation != place_holder_deleg) in nfs_server_return_marked_delegations()
633 delegation = list_entry_rcu(server->delegations.next, in nfs_server_return_marked_delegations()
635 list_for_each_entry_from_rcu(delegation, &server->delegations, super_list) { in nfs_server_return_marked_delegations()
638 if (test_bit(NFS_DELEGATION_INODE_FREEING, &delegation->flags)) in nfs_server_return_marked_delegations()
640 if (!nfs_delegation_need_return(delegation)) { in nfs_server_return_marked_delegations()
641 if (nfs4_is_valid_delegation(delegation, 0)) in nfs_server_return_marked_delegations()
642 prev = delegation; in nfs_server_return_marked_delegations()
645 inode = nfs_delegation_grab_inode(delegation); in nfs_server_return_marked_delegations()
658 delegation = nfs_start_delegation_return_locked(NFS_I(inode)); in nfs_server_return_marked_delegations()
663 err = nfs_end_delegation_return(inode, delegation, 0); in nfs_server_return_marked_delegations()
737 * nfs_inode_evict_delegation - return delegation, don't reclaim opens
740 * Does not protect against delegation reclaims, therefore really only safe
742 * the delegation structure.
746 struct nfs_delegation *delegation; in nfs_inode_evict_delegation() local
748 delegation = nfs_inode_detach_delegation(inode); in nfs_inode_evict_delegation()
749 if (delegation != NULL) { in nfs_inode_evict_delegation()
750 set_bit(NFS_DELEGATION_RETURNING, &delegation->flags); in nfs_inode_evict_delegation()
751 set_bit(NFS_DELEGATION_INODE_FREEING, &delegation->flags); in nfs_inode_evict_delegation()
752 nfs_do_return_delegation(inode, delegation, 1); in nfs_inode_evict_delegation()
753 nfs_free_delegation(delegation); in nfs_inode_evict_delegation()
758 * nfs4_inode_return_delegation - synchronously return a delegation
762 * assumption that if we need to return the delegation, then
770 struct nfs_delegation *delegation; in nfs4_inode_return_delegation() local
772 delegation = nfs_start_delegation_return(nfsi); in nfs4_inode_return_delegation()
773 if (delegation != NULL) { in nfs4_inode_return_delegation()
778 return nfs_end_delegation_return(inode, delegation, 1); in nfs4_inode_return_delegation()
784 * nfs4_inode_set_return_delegation_on_close - asynchronously return a delegation
787 * This routine is called to request that the delegation be returned as soon
788 * as the file is closed. If the file is already closed, the delegation is
793 struct nfs_delegation *delegation; in nfs4_inode_set_return_delegation_on_close() local
799 delegation = nfs4_get_valid_delegation(inode); in nfs4_inode_set_return_delegation_on_close()
800 if (!delegation) in nfs4_inode_set_return_delegation_on_close()
802 spin_lock(&delegation->lock); in nfs4_inode_set_return_delegation_on_close()
803 if (!delegation->inode) in nfs4_inode_set_return_delegation_on_close()
806 !test_and_set_bit(NFS_DELEGATION_RETURNING, &delegation->flags)) { in nfs4_inode_set_return_delegation_on_close()
808 ret = nfs_get_delegation(delegation); in nfs4_inode_set_return_delegation_on_close()
810 set_bit(NFS_DELEGATION_RETURN_IF_CLOSED, &delegation->flags); in nfs4_inode_set_return_delegation_on_close()
812 spin_unlock(&delegation->lock); in nfs4_inode_set_return_delegation_on_close()
821 * nfs4_inode_return_delegation_on_close - asynchronously return a delegation
825 * inode delegation needs to be returned immediately.
829 struct nfs_delegation *delegation; in nfs4_inode_return_delegation_on_close() local
835 delegation = nfs4_get_valid_delegation(inode); in nfs4_inode_return_delegation_on_close()
836 if (!delegation) in nfs4_inode_return_delegation_on_close()
838 if (test_bit(NFS_DELEGATION_RETURN_IF_CLOSED, &delegation->flags) || in nfs4_inode_return_delegation_on_close()
840 spin_lock(&delegation->lock); in nfs4_inode_return_delegation_on_close()
841 if (delegation->inode && in nfs4_inode_return_delegation_on_close()
843 !test_and_set_bit(NFS_DELEGATION_RETURNING, &delegation->flags)) { in nfs4_inode_return_delegation_on_close()
844 clear_bit(NFS_DELEGATION_RETURN_IF_CLOSED, &delegation->flags); in nfs4_inode_return_delegation_on_close()
846 ret = nfs_get_delegation(delegation); in nfs4_inode_return_delegation_on_close()
848 spin_unlock(&delegation->lock); in nfs4_inode_return_delegation_on_close()
861 * Make the inode writeable by returning the delegation if necessary
867 struct nfs_delegation *delegation; in nfs4_inode_make_writeable() local
870 delegation = nfs4_get_valid_delegation(inode); in nfs4_inode_make_writeable()
871 if (delegation == NULL || in nfs4_inode_make_writeable()
873 (delegation->type & FMODE_WRITE))) { in nfs4_inode_make_writeable()
883 struct nfs_delegation *delegation) in nfs_mark_return_if_closed_delegation() argument
887 if (test_bit(NFS_DELEGATION_RETURN, &delegation->flags) || in nfs_mark_return_if_closed_delegation()
888 test_bit(NFS_DELEGATION_RETURN_IF_CLOSED, &delegation->flags)) in nfs_mark_return_if_closed_delegation()
890 spin_lock(&delegation->lock); in nfs_mark_return_if_closed_delegation()
891 inode = delegation->inode; in nfs_mark_return_if_closed_delegation()
895 nfs_mark_return_delegation(server, delegation); in nfs_mark_return_if_closed_delegation()
897 set_bit(NFS_DELEGATION_RETURN_IF_CLOSED, &delegation->flags); in nfs_mark_return_if_closed_delegation()
899 spin_unlock(&delegation->lock); in nfs_mark_return_if_closed_delegation()
904 struct nfs_delegation *delegation; in nfs_server_mark_return_all_delegations() local
907 list_for_each_entry_rcu(delegation, &server->delegations, super_list) { in nfs_server_mark_return_all_delegations()
908 nfs_mark_return_delegation(server, delegation); in nfs_server_mark_return_all_delegations()
967 struct nfs_delegation *delegation; in nfs_mark_return_unused_delegation_types() local
969 list_for_each_entry_rcu(delegation, &server->delegations, super_list) { in nfs_mark_return_unused_delegation_types()
970 if ((delegation->type == (FMODE_READ|FMODE_WRITE)) && !(flags & FMODE_WRITE)) in nfs_mark_return_unused_delegation_types()
972 if (delegation->type & flags) in nfs_mark_return_unused_delegation_types()
973 nfs_mark_return_if_closed_delegation(server, delegation); in nfs_mark_return_unused_delegation_types()
991 struct nfs_delegation *delegation; in nfs_revoke_delegation() local
996 delegation = rcu_dereference(NFS_I(inode)->delegation); in nfs_revoke_delegation()
997 if (delegation == NULL) in nfs_revoke_delegation()
1000 nfs4_stateid_copy(&tmp, &delegation->stateid); in nfs_revoke_delegation()
1003 if (!nfs4_stateid_match_other(stateid, &delegation->stateid)) in nfs_revoke_delegation()
1005 spin_lock(&delegation->lock); in nfs_revoke_delegation()
1007 if (nfs4_stateid_is_newer(&delegation->stateid, stateid)) { in nfs_revoke_delegation()
1008 spin_unlock(&delegation->lock); in nfs_revoke_delegation()
1011 delegation->stateid.seqid = stateid->seqid; in nfs_revoke_delegation()
1013 spin_unlock(&delegation->lock); in nfs_revoke_delegation()
1015 nfs_mark_delegation_revoked(delegation); in nfs_revoke_delegation()
1033 struct nfs_delegation *delegation; in nfs_delegation_mark_returned() local
1039 delegation = rcu_dereference(NFS_I(inode)->delegation); in nfs_delegation_mark_returned()
1040 if (!delegation) in nfs_delegation_mark_returned()
1043 spin_lock(&delegation->lock); in nfs_delegation_mark_returned()
1044 if (!nfs4_stateid_match_other(stateid, &delegation->stateid)) in nfs_delegation_mark_returned()
1047 /* If delegation->stateid is newer, dont mark as returned */ in nfs_delegation_mark_returned()
1048 if (nfs4_stateid_is_newer(&delegation->stateid, stateid)) in nfs_delegation_mark_returned()
1050 if (delegation->stateid.seqid != stateid->seqid) in nfs_delegation_mark_returned()
1051 delegation->stateid.seqid = stateid->seqid; in nfs_delegation_mark_returned()
1054 nfs_mark_delegation_revoked(delegation); in nfs_delegation_mark_returned()
1055 clear_bit(NFS_DELEGATION_RETURNING, &delegation->flags); in nfs_delegation_mark_returned()
1056 spin_unlock(&delegation->lock); in nfs_delegation_mark_returned()
1057 if (nfs_detach_delegation(NFS_I(inode), delegation, NFS_SERVER(inode))) in nfs_delegation_mark_returned()
1058 nfs_put_delegation(delegation); in nfs_delegation_mark_returned()
1062 clear_bit(NFS_DELEGATION_RETURNING, &delegation->flags); in nfs_delegation_mark_returned()
1064 spin_unlock(&delegation->lock); in nfs_delegation_mark_returned()
1074 * @flags: delegation types to expire
1085 struct nfs_delegation *delegation; in nfs_mark_return_unreferenced_delegations() local
1087 list_for_each_entry_rcu(delegation, &server->delegations, super_list) { in nfs_mark_return_unreferenced_delegations()
1088 if (test_and_clear_bit(NFS_DELEGATION_REFERENCED, &delegation->flags)) in nfs_mark_return_unreferenced_delegations()
1090 nfs_mark_return_if_closed_delegation(server, delegation); in nfs_mark_return_unreferenced_delegations()
1112 * nfs_async_inode_return_delegation - asynchronously return a delegation
1123 struct nfs_delegation *delegation; in nfs_async_inode_return_delegation() local
1126 delegation = nfs4_get_valid_delegation(inode); in nfs_async_inode_return_delegation()
1127 if (delegation == NULL) in nfs_async_inode_return_delegation()
1130 !clp->cl_mvops->match_stateid(&delegation->stateid, stateid)) in nfs_async_inode_return_delegation()
1132 nfs_mark_return_delegation(server, delegation); in nfs_async_inode_return_delegation()
1149 struct nfs_delegation *delegation; in nfs_delegation_find_inode_server() local
1153 list_for_each_entry_rcu(delegation, &server->delegations, super_list) { in nfs_delegation_find_inode_server()
1154 spin_lock(&delegation->lock); in nfs_delegation_find_inode_server()
1155 if (delegation->inode != NULL && in nfs_delegation_find_inode_server()
1156 !test_bit(NFS_DELEGATION_REVOKED, &delegation->flags) && in nfs_delegation_find_inode_server()
1157 nfs_compare_fh(fhandle, &NFS_I(delegation->inode)->fh) == 0) { in nfs_delegation_find_inode_server()
1160 res = igrab(delegation->inode); in nfs_delegation_find_inode_server()
1162 spin_unlock(&delegation->lock); in nfs_delegation_find_inode_server()
1172 spin_unlock(&delegation->lock); in nfs_delegation_find_inode_server()
1178 * nfs_delegation_find_inode - retrieve the inode associated with a delegation
1180 * @fhandle: filehandle from a delegation recall
1205 struct nfs_delegation *delegation; in nfs_delegation_mark_reclaim_server() local
1207 list_for_each_entry_rcu(delegation, &server->delegations, super_list) { in nfs_delegation_mark_reclaim_server()
1209 * If the delegation may have been admin revoked, then we in nfs_delegation_mark_reclaim_server()
1212 if (test_bit(NFS_DELEGATION_TEST_EXPIRED, &delegation->flags)) in nfs_delegation_mark_reclaim_server()
1214 set_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags); in nfs_delegation_mark_reclaim_server()
1236 struct nfs_delegation *delegation; in nfs_server_reap_unclaimed_delegations() local
1240 list_for_each_entry_rcu(delegation, &server->delegations, super_list) { in nfs_server_reap_unclaimed_delegations()
1242 &delegation->flags) || in nfs_server_reap_unclaimed_delegations()
1244 &delegation->flags) || in nfs_server_reap_unclaimed_delegations()
1246 &delegation->flags) == 0) in nfs_server_reap_unclaimed_delegations()
1248 inode = nfs_delegation_grab_inode(delegation); in nfs_server_reap_unclaimed_delegations()
1251 delegation = nfs_start_delegation_return_locked(NFS_I(inode)); in nfs_server_reap_unclaimed_delegations()
1253 if (delegation != NULL) { in nfs_server_reap_unclaimed_delegations()
1254 if (nfs_detach_delegation(NFS_I(inode), delegation, in nfs_server_reap_unclaimed_delegations()
1256 nfs_free_delegation(delegation); in nfs_server_reap_unclaimed_delegations()
1258 nfs_put_delegation(delegation); in nfs_server_reap_unclaimed_delegations()
1287 struct nfs_delegation *delegation) in nfs_mark_test_expired_delegation() argument
1289 if (delegation->stateid.type == NFS4_INVALID_STATEID_TYPE) in nfs_mark_test_expired_delegation()
1291 clear_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags); in nfs_mark_test_expired_delegation()
1292 set_bit(NFS_DELEGATION_TEST_EXPIRED, &delegation->flags); in nfs_mark_test_expired_delegation()
1300 struct nfs_delegation *delegation; in nfs_inode_mark_test_expired_delegation() local
1303 delegation = rcu_dereference(NFS_I(inode)->delegation); in nfs_inode_mark_test_expired_delegation()
1304 if (delegation) in nfs_inode_mark_test_expired_delegation()
1305 nfs_mark_test_expired_delegation(server, delegation); in nfs_inode_mark_test_expired_delegation()
1312 struct nfs_delegation *delegation; in nfs_delegation_mark_test_expired_server() local
1314 list_for_each_entry_rcu(delegation, &server->delegations, super_list) in nfs_delegation_mark_test_expired_server()
1315 nfs_mark_test_expired_delegation(server, delegation); in nfs_delegation_mark_test_expired_server()
1366 struct nfs_delegation *delegation; in nfs_server_reap_expired_delegations() local
1377 list_for_each_entry_rcu(delegation, &server->delegations, super_list) { in nfs_server_reap_expired_delegations()
1379 &delegation->flags) || in nfs_server_reap_expired_delegations()
1381 &delegation->flags) || in nfs_server_reap_expired_delegations()
1383 &delegation->flags) == 0 || in nfs_server_reap_expired_delegations()
1384 delegation->test_gen == gen) in nfs_server_reap_expired_delegations()
1386 inode = nfs_delegation_grab_inode(delegation); in nfs_server_reap_expired_delegations()
1389 spin_lock(&delegation->lock); in nfs_server_reap_expired_delegations()
1390 cred = get_cred_rcu(delegation->cred); in nfs_server_reap_expired_delegations()
1391 nfs4_stateid_copy(&stateid, &delegation->stateid); in nfs_server_reap_expired_delegations()
1392 spin_unlock(&delegation->lock); in nfs_server_reap_expired_delegations()
1393 delegation->test_gen = gen; in nfs_server_reap_expired_delegations()
1394 clear_bit(NFS_DELEGATION_TEST_EXPIRED, &delegation->flags); in nfs_server_reap_expired_delegations()
1433 struct nfs_delegation *delegation; in nfs_inode_find_delegation_state_and_recover() local
1437 delegation = rcu_dereference(NFS_I(inode)->delegation); in nfs_inode_find_delegation_state_and_recover()
1438 if (delegation && in nfs_inode_find_delegation_state_and_recover()
1439 nfs4_stateid_match_or_older(&delegation->stateid, stateid) && in nfs_inode_find_delegation_state_and_recover()
1440 !test_bit(NFS_DELEGATION_REVOKED, &delegation->flags)) { in nfs_inode_find_delegation_state_and_recover()
1441 nfs_mark_test_expired_delegation(NFS_SERVER(inode), delegation); in nfs_inode_find_delegation_state_and_recover()
1472 * nfs4_refresh_delegation_stateid - Update delegation stateid seqid
1476 * Returns "true" and updates "dst->seqid" * if inode had a delegation
1477 * that matches our delegation stateid. Otherwise "false" is returned.
1481 struct nfs_delegation *delegation; in nfs4_refresh_delegation_stateid() local
1487 delegation = rcu_dereference(NFS_I(inode)->delegation); in nfs4_refresh_delegation_stateid()
1488 if (delegation != NULL && in nfs4_refresh_delegation_stateid()
1489 nfs4_stateid_match_other(dst, &delegation->stateid) && in nfs4_refresh_delegation_stateid()
1490 nfs4_stateid_is_newer(&delegation->stateid, dst) && in nfs4_refresh_delegation_stateid()
1491 !test_bit(NFS_DELEGATION_REVOKED, &delegation->flags)) { in nfs4_refresh_delegation_stateid()
1492 dst->seqid = delegation->stateid.seqid; in nfs4_refresh_delegation_stateid()
1503 * @flags: delegation type requirement
1507 * Returns "true" and fills in "dst->data" * if inode had a delegation,
1514 struct nfs_delegation *delegation; in nfs4_copy_delegation_stateid() local
1519 delegation = rcu_dereference(nfsi->delegation); in nfs4_copy_delegation_stateid()
1520 if (!delegation) in nfs4_copy_delegation_stateid()
1522 spin_lock(&delegation->lock); in nfs4_copy_delegation_stateid()
1523 ret = nfs4_is_valid_delegation(delegation, flags); in nfs4_copy_delegation_stateid()
1525 nfs4_stateid_copy(dst, &delegation->stateid); in nfs4_copy_delegation_stateid()
1526 nfs_mark_delegation_referenced(delegation); in nfs4_copy_delegation_stateid()
1528 *cred = get_cred(delegation->cred); in nfs4_copy_delegation_stateid()
1530 spin_unlock(&delegation->lock); in nfs4_copy_delegation_stateid()
1541 * against the delegation 'space_limit' field to see if
1547 struct nfs_delegation *delegation; in nfs4_delegation_flush_on_close() local
1551 delegation = rcu_dereference(nfsi->delegation); in nfs4_delegation_flush_on_close()
1552 if (delegation == NULL || !(delegation->type & FMODE_WRITE)) in nfs4_delegation_flush_on_close()
1554 if (atomic_long_read(&nfsi->nrequests) < delegation->pagemod_limit) in nfs4_delegation_flush_on_close()