Date: Thu, 19 Oct 2023 19:36:49 GMT From: Rick Macklem <rmacklem@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: f300335d9aeb - main - nfsd: Fix NFSv4.1/4.2 Claim_Deleg_Cur_FH Message-ID: <202310191936.39JJaniG094346@gitrepo.freebsd.org>
next in thread | raw e-mail | index | archive | help
The branch main has been updated by rmacklem: URL: https://cgit.FreeBSD.org/src/commit/?id=f300335d9aebf2e99862bf783978bd44ede23550 commit f300335d9aebf2e99862bf783978bd44ede23550 Author: Rick Macklem <rmacklem@FreeBSD.org> AuthorDate: 2023-10-19 19:35:35 +0000 Commit: Rick Macklem <rmacklem@FreeBSD.org> CommitDate: 2023-10-19 19:35:35 +0000 nfsd: Fix NFSv4.1/4.2 Claim_Deleg_Cur_FH When I implemented a test patch using Open Claim_Deleg_Cur_FH I discovered that the NFSv4.1/4.2 server was broken for this Open option. Fortunately it is never used by the FreeBSD client and never used by other clients unless delegations are enabled. (The FreeBSD NFSv4 server does not have delegations enabled by default.) Claim_Deleg_Cur_FH was broken because the code mistakenly assumed a stateID argument, which is not the case. This patch fixes the bug by changing the XDR parser to not expect a stateID and to fill most of the stateID in from the clientID. The clientID is the first two elements of the "other" array for the stateID and is sufficient to identify which client the delegation is issued to. Since there is only one delegation issued to a client per file, this is sufficient to locate the correct delegation. If you are running non-FreeBSD NFSv4.1/4.2 mounts against the FreeBSD server, you need this patch if you have delegations enabled. PR: 274574 MFC after: 2 weeks --- sys/fs/nfsserver/nfs_nfsdserv.c | 10 ++++++++-- sys/fs/nfsserver/nfs_nfsdstate.c | 16 ++++++++++++---- 2 files changed, 20 insertions(+), 6 deletions(-) diff --git a/sys/fs/nfsserver/nfs_nfsdserv.c b/sys/fs/nfsserver/nfs_nfsdserv.c index 7d3ebc683d16..3daee65ab83a 100644 --- a/sys/fs/nfsserver/nfs_nfsdserv.c +++ b/sys/fs/nfsserver/nfs_nfsdserv.c @@ -3000,12 +3000,18 @@ nfsrvd_open(struct nfsrv_descript *nd, __unused int isdgram, */ NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); claim = fxdr_unsigned(int, *tl); - if (claim == NFSV4OPEN_CLAIMDELEGATECUR || claim == - NFSV4OPEN_CLAIMDELEGATECURFH) { + if (claim == NFSV4OPEN_CLAIMDELEGATECUR) { NFSM_DISSECT(tl, u_int32_t *, NFSX_STATEID); stateid.seqid = fxdr_unsigned(u_int32_t, *tl++); NFSBCOPY((caddr_t)tl,(caddr_t)stateid.other,NFSX_STATEIDOTHER); stp->ls_flags |= NFSLCK_DELEGCUR; + } else if (claim == NFSV4OPEN_CLAIMDELEGATECURFH) { + /* Fill in most of the stateid from the clientid. */ + stateid.seqid = 0; + stateid.other[0] = clientid.lval[0]; + stateid.other[1] = clientid.lval[1]; + stateid.other[2] = 0; + stp->ls_flags |= NFSLCK_DELEGCUR; } else if (claim == NFSV4OPEN_CLAIMDELEGATEPREV || claim == NFSV4OPEN_CLAIMDELEGATEPREVFH) { stp->ls_flags |= NFSLCK_DELEGPREV; diff --git a/sys/fs/nfsserver/nfs_nfsdstate.c b/sys/fs/nfsserver/nfs_nfsdstate.c index c73840277022..da57ebde7a52 100644 --- a/sys/fs/nfsserver/nfs_nfsdstate.c +++ b/sys/fs/nfsserver/nfs_nfsdstate.c @@ -2568,6 +2568,10 @@ tryagain: /* * For Delegate_Cur, search for the matching Delegation, * which indicates no conflict. + * For NFSv4.1/4.2 Claim_Deleg_Cur_FH only provides + * the clientid, which is the first two "other" elements + * for the stateid. This should be sufficient, since there + * is only one delegation per client and file. * An old delegation should have been recovered by the * client doing a Claim_DELEGATE_Prev, so I won't let * it match and return NFSERR_EXPIRED. Should I let it @@ -2578,8 +2582,8 @@ tryagain: (((nd->nd_flag & ND_NFSV41) != 0 && stateidp->seqid == 0) || stateidp->seqid == stp->ls_stateid.seqid) && - !NFSBCMP(stateidp->other, stp->ls_stateid.other, - NFSX_STATEIDOTHER)) + stateidp->other[0] == stp->ls_stateid.other[0] && + stateidp->other[1] == stp->ls_stateid.other[1]) break; } if (stp == LIST_END(&lfp->lf_deleg) || @@ -2830,6 +2834,10 @@ tryagain: /* * For Delegate_Cur, search for the matching Delegation, * which indicates no conflict. + * For NFSv4.1/4.2 Claim_Deleg_Cur_FH only provides + * the clientid, which is the first two "other" elements + * for the stateid. This should be sufficient, since there + * is only one delegation per client and file. * An old delegation should have been recovered by the * client doing a Claim_DELEGATE_Prev, so I won't let * it match and return NFSERR_EXPIRED. Should I let it @@ -2840,8 +2848,8 @@ tryagain: (((nd->nd_flag & ND_NFSV41) != 0 && stateidp->seqid == 0) || stateidp->seqid == stp->ls_stateid.seqid) && - !NFSBCMP(stateidp->other, stp->ls_stateid.other, - NFSX_STATEIDOTHER)) + stateidp->other[0] == stp->ls_stateid.other[0] && + stateidp->other[1] == stp->ls_stateid.other[1]) break; } if (stp == LIST_END(&lfp->lf_deleg) ||
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?202310191936.39JJaniG094346>