From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 E03E72264A7 for ; Mon, 14 Sep 2026 14:45:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789397147; cv=none; b=tJy5lCvIAq033lunfsE7JUISBf2mJMJqtjtYDOTG9yRSEsj+ntmQ1v1BcGSYIMu5Ykzn8Sj6hkn4dw1T63mmhyNDGc+EW1/p3Bd4bOBmL6/aSX5MIP0U+7rEWqO5Uy0SE1NsirIoAczzS+4hgl8C6ja2AuDa/8IOlKwuo1Csvc4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789397147; c=relaxed/simple; bh=msmjAsyx2rWATWi3E28cNVUM2JPufyMYQoAQlfmNWnM=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=mLrJMux51SotbDYg2vPtIwh0j3bNLZNUKQ/Eh8YHw8bfMQCpBma6JlASkALx4u5y81qQKVdnxwHeajCY4LG3Ub/uH4MIPtoh97ZP+bI+S7J02QQy5UP2hLu01q8Eao4GPZwacwCZdf1xxF7+dAX7oH1JURE/1PfR3mD45k6LspU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=TonRXcMG; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="TonRXcMG" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1ECA61F00898; Mon, 14 Sep 2026 14:45:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789397145; bh=iCKu2lzAHpucXpkLD3haOo99aPtSKB3U+B4h0kmNcpg=; h=From:Date:Subject:References:In-Reply-To:To:Cc; b=TonRXcMGSq8I+41L+6VRkK+WT+YN7SPPj3zjN9maz2H1y6vyldjuVa+3xCCRiv3Ht NNIYlQMQwJw64r1D5jV5MkI0XjFgr32NyYShFdSn1NnbdEYW7/ty2isaEytUBFfhiW Svxlf4sO99pADvWnzkfw63bXZO1J/YiMImImP+o0so3eG42Cv15yT7RbePZO2pkoLj YzAqBYaZEkn70/tc3y034cWfelSXEWIO06uyJQdCTty9uWDdkcREgji4yGNMuhDUFf 6cj2rQpJocMdxT1vTulVRIpcxORH8vJaHY4pLqHy0APdPCbQ2beAfVZEAVYiO4T3PK tZDACJuCckPyw== From: Chuck Lever Date: Mon, 14 Sep 2026 10:45:32 -0400 Subject: [PATCH v4 02/11] NFSD: Track transport in DRC entries Precedence: bulk X-Mailing-List: linux-nfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260914-duplicate-reply-cache-v4-2-bcf9d2628a94@kernel.org> References: <20260914-duplicate-reply-cache-v4-0-bcf9d2628a94@kernel.org> In-Reply-To: <20260914-duplicate-reply-cache-v4-0-bcf9d2628a94@kernel.org> To: Jeff Layton , NeilBrown , Olga Kornievskaia , Dai Ngo , Tom Talpey Cc: Rick Macklem , linux-nfs@vger.kernel.org, Chuck Lever X-Mailer: b4 0.16-dev-da966 X-Developer-Signature: v=1; a=openpgp-sha256; l=1277; i=cel@kernel.org; h=from:subject:message-id; bh=msmjAsyx2rWATWi3E28cNVUM2JPufyMYQoAQlfmNWnM=; b=owEBbQKS/ZANAwAKATNqszNvZn+XAcsmYgBqqAiWVuOOXe+9//U7ZRKoztFwCgII1zPNKZEeb y0v7ICXSg2JAjMEAAEKAB0WIQQosuWwEobfJDzyPv4zarMzb2Z/lwUCaqgIlgAKCRAzarMzb2Z/ l6ybEACba5UBJTGv2TePm0jy1OMiipqSryf2hZCjJ1XHSNjLoxE6O4FbdSHYFdhbUikoe4HTzsz QmzyLfW5PmPSpX2TbyOwMnYMxbLhhcr0Zwvm96DqOe3YnEl9+a+FKju0/cBq061wWobAP4adcsu 2+5l70VomaiwpD9rCjWYPef+z6eMIdGnv+5qQiGf10J+kfCPMFuGZlBTgjjLoL6JTzdrkg/4dG1 BaAmaw3HOKbDtto560T6N+Yj+Lkj1NdIRbSleN1nzX2yEH8HU7AB/qbqOZoEcSK4WPufHhJVwQc vaOhts+sQAHuXB/Edk8sfxBUiCBLgYmpGWXpsDhWsNwxF7JMbyZS8UW4BrIMs4y1gvI1hhTt5rn lGKH1Cxyobwx5idrVylchWRCtgHpjl6E0CCSkOUXCe8rjsUpq9vDAm9/f4LWL0KSJYDyOiTZ720 RmFTk0vGHZh4lp+uhnsjUAm7YLa83prcEINQ4y0L62KfB0bm8pgPJSriXuPLLnLR3Q86/ildPxi JrOs6S80nS2quhAdKU2HPvn23oSxi4wIqs8qjHlyAC+TVK5UPmPCoNMXyQAS8F0je10b8sYPvDg QU1Ya52RS546ue/pWD9nBzDk++w27oi2Fy2//Hr1RHhVQ8YSX7+LPENCum6Jmq0Q4lVuehmcw8w FZ0QEmpFsBSVleA== X-Developer-Key: i=cel@kernel.org; a=openpgp; fpr=28B2E5B01286DF243CF23EFE336AB3336F667F97 A cached reply carries no record of the transport its request arrived on. Transport-aware eviction needs that association. Record the xprt id in each entry. It fits the padding after the flag bytes, so struct nfsd_cacherep stays at 128 bytes. No behavior change. Assisted-by: LLM Signed-off-by: Chuck Lever --- fs/nfsd/cache.h | 1 + fs/nfsd/nfscache.c | 1 + 2 files changed, 2 insertions(+) diff --git a/fs/nfsd/cache.h b/fs/nfsd/cache.h index 3bc4856e34b8..90ecc270640c 100644 --- a/fs/nfsd/cache.h +++ b/fs/nfsd/cache.h @@ -37,6 +37,7 @@ struct nfsd_cacherep { unsigned char c_state, /* unused, inprog, done */ c_type, /* status, buffer */ c_secure : 1; /* req came from port < 1024 */ + u32 c_xprt; /* svc_xprt that carried req */ unsigned long c_timestamp; union { struct kvec u_vec; diff --git a/fs/nfsd/nfscache.c b/fs/nfsd/nfscache.c index 80364b91331a..b25b4f9e92f7 100644 --- a/fs/nfsd/nfscache.c +++ b/fs/nfsd/nfscache.c @@ -109,6 +109,7 @@ nfsd_cacherep_alloc(struct svc_rqst *rqstp, __wsum csum, rp->c_key.k_vers = rqstp->rq_vers; rp->c_key.k_len = rqstp->rq_arg.len; rp->c_key.k_csum = csum; + rp->c_xprt = rqstp->rq_xprt->xpt_id; } return rp; } -- 2.55.0