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 5FBE91D7E54 for ; Wed, 26 Mar 2025 11:18:46 +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=1742987927; cv=none; b=mKcMRj1JcwV1o6ob3dCrIjYdd3ULy5vngWOkGIx9gggZvHOlIRaUV+yJZFUH1/ao8wfrNdFcjkNFNweLGAA+uZygS2Sv/7Z7kUZYOt8U3vS4PYRQKtDo1MN/L985UrRb/kIycfhA2WJQsz3Dl6bjnBDFTMM0KCygEaELDB31sSc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742987927; c=relaxed/simple; bh=wKgCvx89+J3qorNNGcKA6Cyhh1542Qp5jvsr0StXYC8=; h=Message-ID:Subject:From:To:Cc:Date:In-Reply-To:References: Content-Type:MIME-Version; b=lCc2n0lleblmz0tGWQUn1cauAZSYVpkKGhwljHzKgZraIdRGTqUVRgubFxGX8reb+n4Gz9RJiGR/HxuzPrLeT9/+aQEwQDrMJjjic7s8E4nrYz3hBiTmJeeVmqTAfWG92FjC9F6InugVQ+k0D6et6FMlRQDvUMzUobFKx8GWfos= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=hrGPJ5oy; 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="hrGPJ5oy" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5F122C4CEE2; Wed, 26 Mar 2025 11:18:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1742987926; bh=wKgCvx89+J3qorNNGcKA6Cyhh1542Qp5jvsr0StXYC8=; h=Subject:From:To:Cc:Date:In-Reply-To:References:From; b=hrGPJ5oyxPwa95MlOWehR6Rw1JQSrg+k20eBvbknFyTZpRouJGN9hPrQIpaJnKdYv NItIVhf8sowVuMbsQrB8QwrSeX+1V0DQ6A1fu8YkKxEeAvfdnNBXODXZ+QZIQyBegg qQaQ9mOHVCo7rGncLlFEAHRP98YvIGl/XDJirKJ1OI55a/lW3y2INOA0SNLz2G8jDY wSV05Svd0yVaUhuzmTryieJ7gJybrBFG/q/5IRqZh/RL7Fsu4bDSGNSLYjeeuKYn81 Na6cdEPKr+AP7h+4ToJiQBImxE+6mZ7Z1y8UJvAexjle1BarZqvmwKdHnj04OFngQB 9SterTq5UpWKA== Message-ID: <578359da41b13a0ca35879e61e8769b95546e480.camel@kernel.org> Subject: Re: [PATCH v3 6/6] NFSv4: Treat ENETUNREACH errors as fatal for state recovery From: Jeff Layton To: Benjamin Coddington , trondmy@kernel.org Cc: linux-nfs@vger.kernel.org, Josef Bacik Date: Wed, 26 Mar 2025 07:18:45 -0400 In-Reply-To: <4E6693BA-38E4-4BC6-94E0-50E38446BE93@redhat.com> References: <4E6693BA-38E4-4BC6-94E0-50E38446BE93@redhat.com> Autocrypt: addr=jlayton@kernel.org; prefer-encrypt=mutual; keydata=mQINBE6V0TwBEADXhJg7s8wFDwBMEvn0qyhAnzFLTOCHooMZyx7XO7dAiIhDSi7G1NPxw n8jdFUQMCR/GlpozMFlSFiZXiObE7sef9rTtM68ukUyZM4pJ9l0KjQNgDJ6Fr342Htkjxu/kFV1Wv egyjnSsFt7EGoDjdKqr1TS9syJYFjagYtvWk/UfHlW09X+jOh4vYtfX7iYSx/NfqV3W1D7EDi0PqV T2h6v8i8YqsATFPwO4nuiTmL6I40ZofxVd+9wdRI4Db8yUNA4ZSP2nqLcLtFjClYRBoJvRWvsv4lm 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18:35, trondmy@kernel.org wrote: >=20 > > From: Trond Myklebust > >=20 > > If a containerised process is killed and causes an ENETUNREACH or > > ENETDOWN error to be propagated to the state manager, then mark the > > nfs_client as being dead so that we don't loop in functions that are > > expecting recovery to succeed. > >=20 > > Reviewed-by: Jeff Layton > > Signed-off-by: Trond Myklebust > > --- > > fs/nfs/nfs4state.c | 10 +++++++++- > > 1 file changed, 9 insertions(+), 1 deletion(-) > >=20 > > diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c > > index 272d2ebdae0f..7612e977e80b 100644 > > --- a/fs/nfs/nfs4state.c > > +++ b/fs/nfs/nfs4state.c > > @@ -2739,7 +2739,15 @@ static void nfs4_state_manager(struct nfs_client= *clp) > > pr_warn_ratelimited("NFS: state manager%s%s failed on NFSv4 server %s= " > > " with error %d\n", section_sep, section, > > clp->cl_hostname, -status); > > - ssleep(1); > > + switch (status) { > > + case -ENETDOWN: > > + case -ENETUNREACH: > > + nfs_mark_client_ready(clp, -EIO); > > + break; > > + default: > > + ssleep(1); > > + break; > > + } > > out_drain: > > memalloc_nofs_restore(memflags); > > nfs4_end_drain_session(clp); > > --=20 > > 2.49.0 >=20 > Doesn't this have the same bug as the sysfs shutdown - in that a mount wi= th > fatal_neterrors=3DENETDOWN:ENETUNREACH can take down the state manager fo= r a > mount without it? I think the same consideration applies as shutdown so > far: in practical use, you're not going to care. >=20 True. In principle we probably ought to avoid sharing superblocks between mounts with different fatal_errors=3D options. In practice, I agree that no one will care since this means that the server is borked. > Another thought - its pretty subtle that the only way those errors > might/should reach us here is if that mount option is in play. >=20 > Reviewed-by: Benjamin Coddington >=20 > Ben >=20 --=20 Jeff Layton