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[2001:1c00:570d:ee00:496b:7a85:725c:34fb]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b76f5162c5csm420931366b.6.2025.11.28.02.18.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 28 Nov 2025 02:18:18 -0800 (PST) Date: Fri, 28 Nov 2025 11:18:17 +0100 From: Amir Goldstein To: Namjae Jeon Cc: viro@zeniv.linux.org.uk, brauner@kernel.org, hch@infradead.org, hch@lst.de, tytso@mit.edu, willy@infradead.org, jack@suse.cz, djwong@kernel.org, josef@toxicpanda.com, sandeen@sandeen.net, rgoldwyn@suse.com, xiang@kernel.org, dsterba@suse.com, pali@kernel.org, ebiggers@kernel.org, neil@brown.name, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, iamjoonsoo.kim@lge.com, cheol.lee@lge.com, jay.sim@lge.com, gunho.lee@lge.com Subject: Re: [PATCH v2 11/11] ntfsplus: add Kconfig and Makefile Message-ID: References: <20251127045944.26009-1-linkinjeon@kernel.org> <20251127045944.26009-12-linkinjeon@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: On Fri, Nov 28, 2025 at 12:02:25PM +0900, Namjae Jeon wrote: > On Thu, Nov 27, 2025 at 10:12 PM Amir Goldstein wrote: > > > > On Thu, Nov 27, 2025 at 1:40 PM Namjae Jeon wrote: > > > > > > On Thu, Nov 27, 2025 at 8:22 PM Amir Goldstein wrote: > > > > > > > > On Thu, Nov 27, 2025 at 6:01 AM Namjae Jeon wrote: > > > > > > > > > > This adds the Kconfig and Makefile for ntfsplus. > > > > > > > > > > Signed-off-by: Namjae Jeon > > > > > --- > > > > > fs/Kconfig | 1 + > > > > > fs/Makefile | 1 + > > > > > fs/ntfsplus/Kconfig | 45 ++++++++++++++++++++++++++++++++++++++++++++ > > > > > fs/ntfsplus/Makefile | 18 ++++++++++++++++++ > > > > > 4 files changed, 65 insertions(+) > > > > > create mode 100644 fs/ntfsplus/Kconfig > > > > > create mode 100644 fs/ntfsplus/Makefile > > > > > > > > > > diff --git a/fs/Kconfig b/fs/Kconfig > > > > > index 0bfdaecaa877..70d596b99c8b 100644 > > > > > --- a/fs/Kconfig > > > > > +++ b/fs/Kconfig > > > > > @@ -153,6 +153,7 @@ menu "DOS/FAT/EXFAT/NT Filesystems" > > > > > source "fs/fat/Kconfig" > > > > > source "fs/exfat/Kconfig" > > > > > source "fs/ntfs3/Kconfig" > > > > > +source "fs/ntfsplus/Kconfig" > > > > > > > > > > endmenu > > > > > endif # BLOCK > > > > > diff --git a/fs/Makefile b/fs/Makefile > > > > > index e3523ab2e587..2e2473451508 100644 > > > > > --- a/fs/Makefile > > > > > +++ b/fs/Makefile > > > > > @@ -91,6 +91,7 @@ obj-y += unicode/ > > > > > obj-$(CONFIG_SMBFS) += smb/ > > > > > obj-$(CONFIG_HPFS_FS) += hpfs/ > > > > > obj-$(CONFIG_NTFS3_FS) += ntfs3/ > > > > > +obj-$(CONFIG_NTFSPLUS_FS) += ntfsplus/ > > > > > > > > I suggested in another reply to keep the original ntfs name > > > > > > > > More important is to keep your driver linked before the unmaintained > > > > ntfs3, so that it hopefully gets picked up before ntfs3 for auto mount type > > > > if both drivers are built-in. > > > Okay, I will check it:) > > > > > > > > I am not sure if keeping the order here would guarantee the link/registration > > > > order. If not, it may make sense to mutually exclude them as built-in drivers. > > > Okay, I am leaning towards the latter. > > > > Well it's not this OR that. > > please add you driver as the original was before ntfs3 > > > > obj-$(CONFIG_NTFS_FS) += ntfs/ > > obj-$(CONFIG_NTFS3_FS) += ntfs3/ > Okay. > > > > > If you have no objection, I will add the patch to mutually exclude the two ntfs implementation. > > > > You should definitely allow them both if at least one is built as a module > > I think it would be valuable for testing. > > > > Just that > > CONFIG_NTFS_FS=y > > CONFIG_NTFS3_FS=y > > > > I don't see the usefulness in allowing that. > > (other people may disagree) > > > > I think that the way to implement it is using an auxiliary choice config var > > in fs/Kconfig (i.e. CONFIG_DEFAULT_NTFS) and select/depends statements > > to only allow the default ntfs driver to be configured as 'y', > > but couldn't find a good example to point you at. > Okay. Could you please check whether the attached patch matches what > you described ? It's what I meant, but now I think it could be simpler... > > Thanks! > > > > Thanks, > > Amir. > From 11154917ff53d6cf218ac58e6776e603246587b6 Mon Sep 17 00:00:00 2001 > From: Namjae Jeon > Date: Fri, 28 Nov 2025 11:44:45 +0900 > Subject: [PATCH] ntfs: restrict built-in NTFS seclection to one driver, allow > both as modules > > Signed-off-by: Namjae Jeon > --- > fs/Kconfig | 11 +++++++++++ > fs/ntfs3/Kconfig | 2 ++ > fs/ntfsplus/Kconfig | 1 + > 3 files changed, 14 insertions(+) > > diff --git a/fs/Kconfig b/fs/Kconfig > index 70d596b99c8b..c379383cb4ff 100644 > --- a/fs/Kconfig > +++ b/fs/Kconfig > @@ -155,6 +155,17 @@ source "fs/exfat/Kconfig" > source "fs/ntfs3/Kconfig" > source "fs/ntfsplus/Kconfig" > > +choice > + prompt "Select built-in NTFS filesystem (only one can be built-in)" Usually for choice vars there should be a default and usually there should be a DEFAULT_NTFS_NONE > + help > + Only one NTFS can be built into the kernel(y). > + Both can still be built as modules(m). > + > + config DEFAULT_NTFSPLUS > + bool "NTFS+" Usually, this would also 'select NTFS_FS' > + config DEFAULT_NTFS3 > + bool "NTFS3" > +endchoice > endmenu > endif # BLOCK > > diff --git a/fs/ntfs3/Kconfig b/fs/ntfs3/Kconfig > index 7bc31d69f680..18bd6c98c6eb 100644 > --- a/fs/ntfs3/Kconfig > +++ b/fs/ntfs3/Kconfig > @@ -1,6 +1,7 @@ > # SPDX-License-Identifier: GPL-2.0-only > config NTFS3_FS > tristate "NTFS Read-Write file system support" > + depends on !DEFAULT_NTFSPLUS || m So seeing how this condition looks, instead of aux var, it could be directly depends on NTFS_FS != y || m > select BUFFER_HEAD > select NLS > select LEGACY_DIRECT_IO > @@ -49,6 +50,7 @@ config NTFS3_FS_POSIX_ACL > > config NTFS_FS This alias should definitely go a way when you add back the original NTFS_FS. Preferably revert the commit that added the alias at the start of your series. > tristate "NTFS file system support" > + depends on !DEFAULT_NTFSPLUS || m > select NTFS3_FS > select BUFFER_HEAD > select NLS > diff --git a/fs/ntfsplus/Kconfig b/fs/ntfsplus/Kconfig > index 78bc34840463..c8d1ab99113c 100644 > --- a/fs/ntfsplus/Kconfig > +++ b/fs/ntfsplus/Kconfig > @@ -1,6 +1,7 @@ > # SPDX-License-Identifier: GPL-2.0-only > config NTFSPLUS_FS > tristate "NTFS+ file system support (EXPERIMENTAL)" > + depends on !DEFAULT_NTFS3 || m Likewise: depends on NTFS3_FS != y || m Obviously, not tested. If this works, I don't think there is a need for the choice variable As long as you keep the order in fs/Kconfig correct (ntfs before ntfs3) I assume that an oldconfig with both set to y NTFS_FS will win? Please verify that. Thanks, Amir.