nfsd4: match close replays on stateid, not open owner id
Keep around an unhashed copy of the final stateid after the last close using an openowner, and when identifying a replay, match against that stateid instead of just against the open owner id. Free it the next time the seqid is bumped or the stateowner is destroyed. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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dad1c067eb
Коммит
38c387b52d
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@ -438,7 +438,6 @@ static void close_generic_stateid(struct nfs4_ol_stateid *stp)
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static void free_generic_stateid(struct nfs4_ol_stateid *stp)
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{
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close_generic_stateid(stp);
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kmem_cache_free(stateid_slab, stp);
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}
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@ -450,6 +449,7 @@ static void release_lock_stateid(struct nfs4_ol_stateid *stp)
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file = find_any_file(stp->st_file);
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if (file)
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locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner));
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close_generic_stateid(stp);
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free_generic_stateid(stp);
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}
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@ -485,10 +485,16 @@ release_stateid_lockowners(struct nfs4_ol_stateid *open_stp)
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}
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}
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static void release_open_stateid(struct nfs4_ol_stateid *stp)
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static void unhash_open_stateid(struct nfs4_ol_stateid *stp)
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{
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unhash_generic_stateid(stp);
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release_stateid_lockowners(stp);
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close_generic_stateid(stp);
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}
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static void release_open_stateid(struct nfs4_ol_stateid *stp)
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{
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unhash_open_stateid(stp);
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free_generic_stateid(stp);
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}
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@ -510,6 +516,8 @@ static void release_openowner(struct nfs4_openowner *oo)
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{
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unhash_openowner(oo);
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list_del(&oo->oo_close_lru);
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if (oo->oo_last_closed_stid)
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free_generic_stateid(oo->oo_last_closed_stid);
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nfs4_free_openowner(oo);
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}
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@ -2324,6 +2332,7 @@ alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, str
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oo->oo_owner.so_seqid = open->op_seqid;
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oo->oo_flags = 0;
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oo->oo_time = 0;
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oo->oo_last_closed_stid = NULL;
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INIT_LIST_HEAD(&oo->oo_close_lru);
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hash_openowner(oo, clp, strhashval);
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return oo;
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@ -3120,12 +3129,14 @@ laundromat_main(struct work_struct *not_used)
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queue_delayed_work(laundry_wq, &laundromat_work, t*HZ);
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}
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static struct nfs4_openowner * search_close_lru(u32 st_id)
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static struct nfs4_openowner * search_close_lru(stateid_t *s)
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{
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struct nfs4_openowner *local;
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struct nfs4_ol_stateid *os;
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list_for_each_entry(local, &close_lru, oo_close_lru) {
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if (local->oo_owner.so_id == st_id)
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os = local->oo_last_closed_stid;
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if (same_stateid(&os->st_stid.sc_stateid, s))
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return local;
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}
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return NULL;
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@ -3589,6 +3600,27 @@ out:
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return status;
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}
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void nfsd4_purge_closed_stateid(struct nfs4_stateowner *so)
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{
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struct nfs4_openowner *oo;
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struct nfs4_ol_stateid *s;
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if (!so->so_is_open_owner)
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return;
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oo = openowner(so);
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s = oo->oo_last_closed_stid;
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if (!s)
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return;
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if (!(oo->oo_flags & NFS4_OO_PURGE_CLOSE)) {
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/* Release the last_closed_stid on the next seqid bump: */
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oo->oo_flags |= NFS4_OO_PURGE_CLOSE;
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return;
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}
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oo->oo_flags &= ~NFS4_OO_PURGE_CLOSE;
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free_generic_stateid(oo->oo_last_closed_stid);
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oo->oo_last_closed_stid = NULL;
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}
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/*
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* nfs4_unlock_state() called after encode
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*/
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@ -3613,7 +3645,7 @@ nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
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* Also, we should make sure this isn't just the result of
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* a replayed close:
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*/
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oo = search_close_lru(close->cl_stateid.si_stateownerid);
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oo = search_close_lru(&close->cl_stateid);
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/* It's not stale; let's assume it's expired: */
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if (oo == NULL)
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goto out;
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@ -3630,8 +3662,9 @@ nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
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update_stateid(&stp->st_stid.sc_stateid);
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memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t));
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/* release_stateid() calls nfsd_close() if needed */
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release_open_stateid(stp);
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/* unhash_open_stateid() calls nfsd_close() if needed */
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oo->oo_last_closed_stid = stp;
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unhash_open_stateid(stp);
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/* place unused nfs4_stateowners on so_close_lru list to be
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* released by the laundromat service after the lease period
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@ -1636,6 +1636,7 @@ static void encode_seqid_op_tail(struct nfsd4_compoundres *resp, __be32 *save, _
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(char *)resp->p - (char *)save;
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memcpy(stateowner->so_replay.rp_buf, save,
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stateowner->so_replay.rp_buflen);
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nfsd4_purge_closed_stateid(stateowner);
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}
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}
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@ -370,8 +370,10 @@ struct nfs4_openowner {
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struct nfs4_stateowner oo_owner; /* must be first field */
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struct list_head oo_perclient;
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struct list_head oo_close_lru; /* tail queue */
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struct nfs4_ol_stateid *oo_last_closed_stid;
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time_t oo_time; /* time of placement on so_close_lru */
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#define NFS4_OO_CONFIRMED 1
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#define NFS4_OO_PURGE_CLOSE 2
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unsigned char oo_flags;
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};
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@ -514,5 +516,6 @@ extern int nfsd4_create_clid_dir(struct nfs4_client *clp);
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extern void nfsd4_remove_clid_dir(struct nfs4_client *clp);
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extern void release_session_client(struct nfsd4_session *);
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extern __be32 nfs4_validate_stateid(stateid_t *, bool);
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extern void nfsd4_purge_closed_stateid(struct nfs4_stateowner *);
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#endif /* NFSD4_STATE_H */
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