Date: Mon, 4 Jun 2018 20:40:22 +0000 (UTC) From: Rick Macklem <rmacklem@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r334633 - stable/10/sys/fs/nfsserver Message-ID: <201806042040.w54KeMtt051961@repo.freebsd.org>
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Author: rmacklem Date: Mon Jun 4 20:40:22 2018 New Revision: 334633 URL: https://svnweb.freebsd.org/changeset/base/334633 Log: MFC: r333592 Fix the eir_server_scope reply argument for NFSv4.1 ExchangeID. In the reply to an ExchangeID operation, the NFSv4.1 server returns a "scope" value (eir_server_scope). If this value is the same, it indicates that two servers share state, which is never the case for FreeBSD servers. As such, the value needs to be unique and it was without this patch. However, I just found out that it is not supposed to change when the server reboots and without this patch, it did change. This patch fixes eir_server_scope so that it does not change when the server is rebooted. The only affect not having this patch has is that Linux clients don't reclaim opens and locks after a server reboot, which meant they lost any byte range locks held before the server rebooted. It only affects NFSv4.1 mounts and the FreeBSD NFSv4.1 client was not affected by this bug. Modified: stable/10/sys/fs/nfsserver/nfs_nfsdserv.c Directory Properties: stable/10/ (props changed) Modified: stable/10/sys/fs/nfsserver/nfs_nfsdserv.c ============================================================================== --- stable/10/sys/fs/nfsserver/nfs_nfsdserv.c Mon Jun 4 20:39:58 2018 (r334632) +++ stable/10/sys/fs/nfsserver/nfs_nfsdserv.c Mon Jun 4 20:40:22 2018 (r334633) @@ -3800,9 +3800,9 @@ nfsrvd_exchangeid(struct nfsrv_descript *nd, __unused txdr_hyper(owner_minor, tl); /* Minor */ (void)nfsm_strtom(nd, nd->nd_cred->cr_prison->pr_hostuuid, strlen(nd->nd_cred->cr_prison->pr_hostuuid)); /* Major */ - NFSM_BUILD(tl, uint32_t *, 3 * NFSX_UNSIGNED); - *tl++ = txdr_unsigned(NFSX_UNSIGNED); - *tl++ = time_uptime; /* Make scope a unique value. */ + (void)nfsm_strtom(nd, nd->nd_cred->cr_prison->pr_hostuuid, + strlen(nd->nd_cred->cr_prison->pr_hostuuid)); /* Scope */ + NFSM_BUILD(tl, uint32_t *, NFSX_UNSIGNED); *tl = txdr_unsigned(1); (void)nfsm_strtom(nd, "freebsd.org", strlen("freebsd.org")); (void)nfsm_strtom(nd, version, strlen(version));
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