From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (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 C30AD43E092 for ; Mon, 24 Aug 2026 14:44:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787582691; cv=none; b=LnOmEygJeVDjdRjUAvNuMYZu3lGdrHQRffiSUBZLx5lNMwiv1eN+5So6byvfaq2Ly5FxE6mzDqNNVuHCLTeTi8nDYT4u+JvJHiqKxY2IHckpcmHISIUptQWpgl6uV3ZXAv9F+n0a5qJn3ob23GogLSpZb/1d/GZB9gNQkcebTqQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787582691; c=relaxed/simple; bh=wgYu6gI5V2Eao2dPlRPwB8T+Tu60WhH38AcZaIiCaoA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Qnq6CmRYP8J27l/vY+vZXCj2ju1SETt0+kNoBX067f9ia7hRU8psBVXgPYQabTGwNsB/G0n8mOr2HDwhR0wKUE5XKBOpNomPdB0XErjiwNfw1fbC7kFAU3L/7hWIFx5uIzdK0v23nN+hYcz558COKIkmUF38eiz5DuZk2UhYGR8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=Rj009vFP; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="Rj009vFP" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1787582688; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=+g0CT/3xbEYkbuzN70YZ1k411vm20BLM3/RDiJeUpoQ=; b=Rj009vFPMoTxTu+xoOKng2qlPbGEnO8dnNJ9CiNI6rPw8mBgnEW9ZX/WhdZtWnxWq3J4of EFZhu4sTp5wuRnDGtRLOYjz3bRaH2j/s1raTQNXAjq7huaO/kkOVtFCNJx00BVY9Tn93e9 lAbOraQVyg0kd0Z6NDQfd7UIs6HOsP8= Received: from mx-prod-mc-08.mail-002.prod.us-west-2.aws.redhat.com (ec2-35-165-154-97.us-west-2.compute.amazonaws.com [35.165.154.97]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-664-6DFV8RnON6uyFerSV8GGUg-1; Mon, 24 Aug 2026 10:44:43 -0400 X-MC-Unique: 6DFV8RnON6uyFerSV8GGUg-1 X-Mimecast-MFC-AGG-ID: 6DFV8RnON6uyFerSV8GGUg_1787582679 Received: from mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.4]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 3B5F41834590; Mon, 24 Aug 2026 14:44:39 +0000 (UTC) Received: from warthog.com (unknown [10.44.32.15]) by mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id B193B30002ED; Mon, 24 Aug 2026 14:44:31 +0000 (UTC) From: David Howells To: Paulo Alcantara Cc: David Howells , Christian Brauner , Matthew Wilcox , Christoph Hellwig , Jens Axboe , Leon Romanovsky , Namjae Jeon , ChenXiaoSong , Marc Dionne , Stefan Metzmacher , Eric Van Hensbergen , Dominique Martinet , Ilya Dryomov , netfs@lists.linux.dev, linux-afs@lists.infradead.org, linux-cifs@vger.kernel.org, linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org, v9fs@lists.linux.dev, linux-erofs@lists.ozlabs.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, Trond Myklebust , Anna Schumaker , Alex Markuze , Viacheslav Dubeyko Subject: [PATCH v10 21/35] netfs: Make deprecated PG_private_2 support optional Date: Mon, 24 Aug 2026 15:41:14 +0100 Message-ID: <20260824144130.759997-22-dhowells@redhat.com> In-Reply-To: <20260824144130.759997-1-dhowells@redhat.com> References: <20260824144130.759997-1-dhowells@redhat.com> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 Make the deprecated PG_private_2 support optional, requiring it to be selected by the filesystems that might want to use it. Signed-off-by: David Howells cc: Paulo Alcantara cc: Matthew Wilcox cc: Christoph Hellwig cc: Trond Myklebust cc: Anna Schumaker cc: Ilya Dryomov cc: Alex Markuze cc: Viacheslav Dubeyko cc: netfs@lists.linux.dev cc: linux-nfs@vger.kernel.org cc: ceph-devel@vger.kernel.org cc: linux-fsdevel@vger.kernel.org --- fs/ceph/Kconfig | 1 + fs/netfs/Kconfig | 3 +++ fs/netfs/Makefile | 2 +- fs/netfs/internal.h | 28 ++++++++++++++++++++++++++++ fs/netfs/read_collect.c | 2 +- fs/nfs/Kconfig | 1 + include/linux/netfs.h | 2 ++ 7 files changed, 37 insertions(+), 2 deletions(-) diff --git a/fs/ceph/Kconfig b/fs/ceph/Kconfig index 3d64a316ca31..aa6ccd7794d2 100644 --- a/fs/ceph/Kconfig +++ b/fs/ceph/Kconfig @@ -4,6 +4,7 @@ config CEPH_FS depends on INET select CEPH_LIB select NETFS_SUPPORT + select NETFS_PGPRIV2 select FS_ENCRYPTION_ALGS if FS_ENCRYPTION default n help diff --git a/fs/netfs/Kconfig b/fs/netfs/Kconfig index 7701c037c328..d0e7b0971fa3 100644 --- a/fs/netfs/Kconfig +++ b/fs/netfs/Kconfig @@ -22,6 +22,9 @@ config NETFS_STATS between CPUs. On the other hand, the stats are very useful for debugging purposes. Saying 'Y' here is recommended. +config NETFS_PGPRIV2 + bool + config NETFS_DEBUG bool "Enable dynamic debugging netfslib and FS-Cache" depends on NETFS_SUPPORT diff --git a/fs/netfs/Makefile b/fs/netfs/Makefile index e1f12ecb5abf..b1ea4439c1bb 100644 --- a/fs/netfs/Makefile +++ b/fs/netfs/Makefile @@ -12,7 +12,6 @@ netfs-y := \ misc.o \ objects.o \ read_collect.o \ - read_pgpriv2.o \ read_retry.o \ read_single.o \ rolling_buffer.o \ @@ -20,6 +19,7 @@ netfs-y := \ write_issue.o \ write_retry.o +netfs-$(CONFIG_NETFS_PGPRIV2) += read_pgpriv2.o netfs-$(CONFIG_NETFS_STATS) += stats.o netfs-$(CONFIG_FSCACHE) += \ diff --git a/fs/netfs/internal.h b/fs/netfs/internal.h index df04ee82e34b..c50750b72262 100644 --- a/fs/netfs/internal.h +++ b/fs/netfs/internal.h @@ -120,9 +120,37 @@ void netfs_cache_read_terminated(void *priv, ssize_t transferred_or_error); /* * read_pgpriv2.c */ +#ifdef CONFIG_NETFS_PGPRIV2 +int netfs_prepare_pgpriv2_write_buffer(struct netfs_io_subrequest *subreq, + unsigned int max_segs); void netfs_pgpriv2_copy_to_cache(struct netfs_io_request *rreq, struct folio *folio); void netfs_pgpriv2_end_copy_to_cache(struct netfs_io_request *rreq); bool netfs_pgpriv2_unlock_copied_folios(struct netfs_io_request *wreq); +static inline bool netfs_using_pgpriv2(const struct netfs_io_request *rreq) +{ + return test_bit(NETFS_RREQ_USE_PGPRIV2, &rreq->flags); +} +#else +static inline int netfs_prepare_pgpriv2_write_buffer(struct netfs_io_subrequest *subreq, + unsigned int max_segs) +{ + return -EIO; +} +static inline void netfs_pgpriv2_copy_to_cache(struct netfs_io_request *rreq, struct folio *folio) +{ +} +static inline void netfs_pgpriv2_end_copy_to_cache(struct netfs_io_request *rreq) +{ +} +static inline bool netfs_pgpriv2_unlock_copied_folios(struct netfs_io_request *wreq) +{ + return true; +} +static inline bool netfs_using_pgpriv2(const struct netfs_io_request *rreq) +{ + return false; +} +#endif /* * read_retry.c diff --git a/fs/netfs/read_collect.c b/fs/netfs/read_collect.c index f758ab0aaf5d..f773579692ab 100644 --- a/fs/netfs/read_collect.c +++ b/fs/netfs/read_collect.c @@ -54,7 +54,7 @@ static void netfs_unlock_read_folio(struct netfs_io_request *rreq, flush_dcache_folio(folio); folio_mark_uptodate(folio); - if (!test_bit(NETFS_RREQ_USE_PGPRIV2, &rreq->flags)) { + if (!netfs_using_pgpriv2(rreq)) { finfo = netfs_folio_info(folio); if (finfo) { trace_netfs_folio(folio, netfs_folio_trace_filled_gaps); diff --git a/fs/nfs/Kconfig b/fs/nfs/Kconfig index 6bb30543eff0..e7862f35b72c 100644 --- a/fs/nfs/Kconfig +++ b/fs/nfs/Kconfig @@ -174,6 +174,7 @@ config NFS_FSCACHE bool "Provide NFS client caching support" depends on NFS_FS select NETFS_SUPPORT + select NETFS_PGPRIV2 select FSCACHE help Say Y here if you want NFS data to be cached locally on disc through diff --git a/include/linux/netfs.h b/include/linux/netfs.h index b6e5f6dc54e2..7cdb14a130d9 100644 --- a/include/linux/netfs.h +++ b/include/linux/netfs.h @@ -279,8 +279,10 @@ struct netfs_io_request { #define NETFS_RREQ_UPLOAD_TO_SERVER 11 /* Need to write to the server */ #define NETFS_RREQ_USE_IO_ITER 12 /* Use ->io_iter rather than ->i_pages */ #define NETFS_RREQ_NEED_PUT_RA_REFS 17 /* Need to put the folio refs RA gave us */ +#ifdef CONFIG_NETFS_PGPRIV2 #define NETFS_RREQ_USE_PGPRIV2 31 /* [DEPRECATED] Use PG_private_2 to mark * write to cache on read */ +#endif const struct netfs_request_ops *netfs_ops; };