From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 48D732FBDFF for ; Wed, 19 Nov 2025 19:26:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763580408; cv=none; b=o5sREHPt9chRXYk9S8OmW40mTUlBOfk4uoo5lxDd2RZNsvkIHxgZcX2QL0bFUszl1VCvrglcUYynqiG3/zTI/eQdFA6uX5SSoWLRHOuiNYX8adgZcIe/d9sYZWDbX10MKChQgwM8nscSSuoqTq9M9AT/paRY3YYa9wPlQprb83E= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763580408; c=relaxed/simple; bh=h5pZQMtOb6x98bom8j7Ai5ndsEUoo0Jj93ME55dBf1w=; h=Message-ID:Subject:From:To:Cc:Date:In-Reply-To:References: Content-Type:MIME-Version; b=eTQfxA1Qvj7OEdlAWjXZ2GyYlA5r4onhXE7+jykNJhbwoFn3BrrD9EwIBDRrnJUzPckapcugOmQZjSZpHJI7O6N+vzfG9ZOoYFI+ab9Woyhy/OrN3SvoPD2folQfR1JD/DLjMENuHMxElGkK8VxBzNaOq0anBnbAH7BggwQplwY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=VO3dtqEV; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="VO3dtqEV" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4BD77C4CEF5; Wed, 19 Nov 2025 19:26:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1763580406; bh=h5pZQMtOb6x98bom8j7Ai5ndsEUoo0Jj93ME55dBf1w=; h=Subject:From:To:Cc:Date:In-Reply-To:References:From; b=VO3dtqEVS2RTe7vmMYYjxW2SnjauQrWWfZg6C1sU52hQHIMvRrNN5zlUBdLvprWf9 WyYG74v7KuaOfy3J/TKv0a3zUtbDZhnAAmXmYzQWhCwD5NAylrmBYsGJTE34BfB93+ mGh457eR9gkkyBRIbBELfjcXxRymFCW7xWhyMOLYj5QVFSqr+pOsaaZL3Jkczik03c A4kCtF3MO0nw/ho6UOk3kp9NbUAkQ0rMwDKS9znf6Y6/qe0ldy9yrNXBA6FhLs2SgX xnkxUKOgx65dkoB3reqkzFY67a0DPp4h8g8OxJfOtxWo3dpCgMUT+jRedEiLzlrJTO kUhiB+zSrzJKA== Message-ID: Subject: Re: [PATCH v5 04/11] nfsd: report correct error for attempt to use foreign filehandle From: Jeff Layton To: NeilBrown , Chuck Lever Cc: Olga Kornievskaia , Dai Ngo , Tom Talpey , linux-nfs@vger.kernel.org Date: Wed, 19 Nov 2025 14:26:45 -0500 In-Reply-To: <20251119033204.360415-5-neilb@ownmail.net> References: <20251119033204.360415-1-neilb@ownmail.net> <20251119033204.360415-5-neilb@ownmail.net> Autocrypt: addr=jlayton@kernel.org; prefer-encrypt=mutual; keydata=mQINBE6V0TwBEADXhJg7s8wFDwBMEvn0qyhAnzFLTOCHooMZyx7XO7dAiIhDSi7G1NPxw n8jdFUQMCR/GlpozMFlSFiZXiObE7sef9rTtM68ukUyZM4pJ9l0KjQNgDJ6Fr342Htkjxu/kFV1Wv egyjnSsFt7EGoDjdKqr1TS9syJYFjagYtvWk/UfHlW09X+jOh4vYtfX7iYSx/NfqV3W1D7EDi0PqV T2h6v8i8YqsATFPwO4nuiTmL6I40ZofxVd+9wdRI4Db8yUNA4ZSP2nqLcLtFjClYRBoJvRWvsv4lm 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COMPOUND with > PUTFH foreign filehandle > SAVFH > RESTOREFH > some-op-that-uses-current_fh > COPY >=20 > will report NFS4ERR_NOHANDLE for that 4th op as ALLOWED_WITHOUT_LOCAL_FH > is set and ->fh_dentry is NULL. However that error is not correct. > NFS4ERR_STALE or NFS4ERR_BADHANDLE would be the correct error. >=20 > This patch saves the correct error and reports it when appropriate. >=20 > It is highly unlikely that a client would ever notice this difference as > the COMPOUND that would produce it is bizarre. Maybe we don't need this > patch. >=20 > Signed-off-by: NeilBrown > --- > fs/nfsd/nfs4proc.c | 4 +++- > fs/nfsd/xdr4.h | 3 ++- > 2 files changed, 5 insertions(+), 2 deletions(-) >=20 > diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c > index e6f8b5b907a9..e61b1ee6c8d8 100644 > --- a/fs/nfsd/nfs4proc.c > +++ b/fs/nfsd/nfs4proc.c > @@ -712,6 +712,7 @@ nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_comp= ound_state *cstate, > * in the COMPOUND, and extend it to > * NFS4ERR_BADHANDLE. > */ > + cstate->saved_status =3D ret; > ret =3D 0; > } > } > @@ -2856,6 +2857,7 @@ nfsd4_proc_compound(struct svc_rqst *rqstp) > resp->tag =3D args->tag; > resp->rqstp =3D rqstp; > cstate->minorversion =3D args->minorversion; > + cstate->saved_status =3D nfserr_nofilehandle; > fh_init(current_fh, NFS4_FHSIZE); > fh_init(save_fh, NFS4_FHSIZE); > /* > @@ -2907,7 +2909,7 @@ nfsd4_proc_compound(struct svc_rqst *rqstp) > } > if (!current_fh->fh_dentry) { > if (!(op->opdesc->op_flags & ALLOWED_WITHOUT_LOCAL_FH)) { > - op->status =3D nfserr_nofilehandle; > + op->status =3D cstate->saved_status; > goto encode_op; > } > } else if (current_fh->fh_export->ex_fslocs.migrated && > diff --git a/fs/nfsd/xdr4.h b/fs/nfsd/xdr4.h > index 3de8f4e07c49..bcaf631ec12d 100644 > --- a/fs/nfsd/xdr4.h > +++ b/fs/nfsd/xdr4.h > @@ -187,10 +187,11 @@ struct nfsd4_compound_state { > struct nfsd4_session *session; > struct nfsd4_slot *slot; > int data_offset; > - bool spo_must_allowed; > + bool spo_must_allowed; > size_t iovlen; > u32 minorversion; > __be32 status; > + __be32 saved_status; > stateid_t current_stateid; > stateid_t save_stateid; > /* to indicate current and saved state id presents */ It seems like a reasonable thing to do, even if not strictly needed. nfsd does occasionally have to deal with weird compounds coming from stuff like pynfs. Hmm...maybe we need a pynfs test that crafts such a compound? Anyway, you can add this, but I'm ok with dropping it if you prefer. Reviewed-by: Jeff Layton