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Tue, 29 Sep 2026 15:35:51 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id y8YsBdfau2rwKAAAD6G6ig (envelope-from ); Tue, 29 Sep 2026 15:35:51 +0000 From: Gabriel Krisman Bertazi To: Pali =?utf-8?Q?Roh=C3=A1r?= , Amir Goldstein Cc: linux-fsdevel@vger.kernel.org, Christian Brauner , Jan Kara , Theodore Ts'o , Hugh Dickins , Daniel Tang , linux-ext4@vger.kernel.org, Miklos Szeredi , linux-unionfs@vger.kernel.org, linux-mm@kvack.org, Chuck Lever Subject: Re: [PATCH 4/4] ovl: Expose the filesystem encoding through sysfs In-Reply-To: <20260929144043.5rg4zf7uth333qke@pali> Organization: SUSE References: <20260928213155.2612039-1-krisman@suse.de> <20260928213155.2612039-5-krisman@suse.de> <20260929144043.5rg4zf7uth333qke@pali> Date: Tue, 29 Sep 2026 11:35:49 -0400 Message-ID: <87jyo4xe7e.fsf@mailhost.krisman.be> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Rspamd-Action: no action X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 380E14000D X-Stat-Signature: rbn1bcbc7ysqosj9raxmi9emtt3ma1xb X-Rspam-User: X-HE-Tag: 1790696161-810733 X-HE-Meta: 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 4rMX3/jr igVkKcwyWqK6z0Kacp4oCUq6oEPTJzP1Ja89ubocFQuwD1gpH32tNP37swuWJ9l7AvJCI0ZhnWBRHsvsNIvYR+aNPlXdERWSJhrBje/Pc9TyU1sUbFtxyglRGo/Ho5mmqGxg7WGSPQ5kOFMxJXfcBzGOJBbk7LB7hV6pyTKuw2Qesp/96OW6SH7tBYcs8GssBiK8nSKUG7zL5NcSZDunIKcn326MrWawDWuo7Sd/vQNeObYKo1TX1Cp7b6dCMEzuCz8S7GLOH6QNAW8A0nbmFMsumVsYdFCPrkUb6/z+uh69wf6XdSjH7ItgjDPNfO60wjnnAfJlOZXNZU6Vl/W74rW+dtuXsV+YDrd3ZO8RS5Z+3sAIGvoE67C3GqVTl93BVU81A/PhjSaLcdvIbRmzhZFj936AAaNoFvPSKhzScu31731g= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Pali Roh=C3=A1r writes: > On Tuesday 29 September 2026 16:15:04 Amir Goldstein wrote: >> On Mon, Sep 28, 2026 at 11:32=E2=80=AFPM Gabriel Krisman Bertazi >> wrote: >> > >> > This patch reproduces the same interface from ext4/f2fs to have feature >> > parity, so users don't need to rely on parsing dmesg or trying +F on a >> > temporary directory just to check for support. Note there is no >> > encoding_flags file, as none are supported by ovl. >> > >>=20 >> Gabriel, >>=20 >> I am not ok with this API. >> It is wrong in several ways. >> It is not generic, we have already file_getattr() to get casefold status. >> There was a suggestion by Pali [1] to get the supported xflags - statx s= tyle, >> which can be a way to say if a fs could return FS_XFLAG_CASEFOLD. > > Yea, sorry for that. I have not finished it, I did not have time. But I > would like to address this as this is something was was asked more > times... please cc me when sending it.=20 --=20 Gabriel Krisman Bertazi