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From: Olga Kornievskaia <olga.kornievskaia@gmail.com>
To: bfields@redhat.com
Cc: linux-nfs@vger.kernel.org, linux-fsdevel@vger.kernel.org
Subject: [PATCH v2 07/10] NFSD check stateids against copy stateids
Date: Fri, 30 Nov 2018 15:03:45 -0500
Message-ID: <20181130200348.59524-8-olga.kornievskaia@gmail.com> (raw)
In-Reply-To: <20181130200348.59524-1-olga.kornievskaia@gmail.com>

Incoming stateid (used by a READ) could be a saved copy stateid.
On first use make it active and check that the copy has started
within the allowable lease time.

Signed-off-by: Olga Kornievskaia <kolga@netapp.com>
---
 fs/nfsd/nfs4state.c | 45 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index eaa136f..7b3586ab 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -5203,6 +5203,49 @@ static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid)
 
 	return 0;
 }
+/*
+ * A READ from an inter server to server COPY will have a
+ * copy stateid. Return the parent nfs4_stid.
+ */
+static __be32 _find_cpntf_state(struct nfsd_net *nn, stateid_t *st,
+		     struct nfs4_cpntf_state **cps)
+{
+	struct nfs4_cpntf_state *state = NULL;
+
+	if (st->si_opaque.so_clid.cl_id != nn->s2s_cp_cl_id)
+		return nfserr_bad_stateid;
+	spin_lock(&nn->s2s_cp_lock);
+	state = idr_find(&nn->s2s_cp_stateids, st->si_opaque.so_id);
+	if (state)
+		refcount_inc(&state->cp_p_stid->sc_count);
+	spin_unlock(&nn->s2s_cp_lock);
+	if (!state)
+		return nfserr_bad_stateid;
+	*cps = state;
+	return 0;
+}
+
+static __be32 find_cpntf_state(struct nfsd_net *nn, stateid_t *st,
+			       struct nfs4_stid **stid)
+{
+	__be32 status;
+	struct nfs4_cpntf_state *cps = NULL;
+
+	status = _find_cpntf_state(nn, st, &cps);
+	if (status)
+		return status;
+
+	/* Did the inter server to server copy start in time? */
+	if (cps->cp_active == false && !time_after(cps->cp_timeout, jiffies)) {
+		nfs4_put_stid(cps->cp_p_stid);
+		return nfserr_partner_no_auth;
+	} else
+		cps->cp_active = true;
+
+	*stid = cps->cp_p_stid;
+
+	return nfs_ok;
+}
 
 /*
  * Checks for stateid operations
@@ -5235,6 +5278,8 @@ static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid)
 	status = nfsd4_lookup_stateid(cstate, stateid,
 				NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID,
 				&s, nn);
+	if (status == nfserr_bad_stateid)
+		status = find_cpntf_state(nn, stateid, &s);
 	if (status)
 		return status;
 	status = nfsd4_stid_check_stateid_generation(stateid, s,
-- 
1.8.3.1


  parent reply index

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-11-30 20:03 [PATCH v2 00/10] server-side support for "inter" SSC copy Olga Kornievskaia
2018-11-30 20:03 ` [PATCH v2 01/10] VFS generic copy_file_range() support Olga Kornievskaia
2018-12-01  8:11   ` Amir Goldstein
2018-12-01 13:23     ` Olga Kornievskaia
2018-12-01 13:44       ` Olga Kornievskaia
     [not found]         ` <CAOQ4uxgENLCDH7QwtBPxA60dKEXvLVknBMY_Lgoetq_uQ=7gwA@mail.gmail.com>
     [not found]           ` <CAN-5tyFGV=fUCbAG5mSvy=LXDpdp8VG9Sh1aGMkBHQAG1Rp1sQ@mail.gmail.com>
2018-12-01 16:59             ` Amir Goldstein
2018-12-01 22:00     ` Dave Chinner
2018-12-02  3:12       ` Olga Kornievskaia
2018-12-02 15:19         ` Olga Kornievskaia
2018-12-02 20:47         ` Dave Chinner
2018-12-01 21:18   ` Matthew Wilcox
2018-12-01 22:36     ` Dave Chinner
2018-11-30 20:03 ` [PATCH v2 02/10] NFS fallback to generic_copy_file_range Olga Kornievskaia
2018-11-30 20:03 ` [PATCH v2 03/10] NFSD fill-in netloc4 structure Olga Kornievskaia
2018-11-30 20:03 ` [PATCH v2 04/10] NFSD add ca_source_server<> to COPY Olga Kornievskaia
2019-02-19 16:17   ` bfields
2018-11-30 20:03 ` [PATCH v2 05/10] NFSD return nfs4_stid in nfs4_preprocess_stateid_op Olga Kornievskaia
2018-11-30 20:03 ` [PATCH v2 06/10] NFSD add COPY_NOTIFY operation Olga Kornievskaia
2019-02-20  1:44   ` bfields
2019-02-20  2:07   ` bfields
2019-02-20 14:04     ` J. Bruce Fields
2019-02-20  2:12   ` bfields
2019-02-20  2:35   ` bfields
2019-06-14 19:11     ` Olga Kornievskaia
2018-11-30 20:03 ` Olga Kornievskaia [this message]
2018-11-30 20:03 ` [PATCH v2 08/10] NFSD generalize nfsd4_compound_state flag names Olga Kornievskaia
2018-11-30 20:03 ` [PATCH v2 09/10] NFSD: allow inter server COPY to have a STALE source server fh Olga Kornievskaia
2018-12-05 18:05   ` Olga Kornievskaia
2019-02-19 15:53   ` bfields
2018-11-30 20:03 ` [PATCH v2 10/10] NFSD add nfs4 inter ssc to nfsd4_copy Olga Kornievskaia
2019-02-19 15:54   ` bfields
2018-12-20 18:42 ` [PATCH v2 00/10] server-side support for "inter" SSC copy Olga Kornievskaia
2018-12-21 19:08   ` J. Bruce Fields
2019-01-14 14:53     ` Olga Kornievskaia
2019-01-16 22:08       ` J. Bruce Fields
2019-01-17 17:03         ` Olga Kornievskaia
2019-02-19 16:03         ` bfields

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