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Wed, 20 May 2026 10:39:36 -0400 (EDT) X-Mailer: MessagingEngine.com Webmail Interface Precedence: bulk X-Mailing-List: linux-ext4@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ThreadId: AuvJ25pICu_N Date: Wed, 20 May 2026 10:39:16 -0400 From: "Chuck Lever" To: "Mark Brown" Cc: "Alexander Viro" , "Christian Brauner" , "Jan Kara" , linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-cifs@vger.kernel.org, linux-nfs@vger.kernel.org, linux-api@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, "OGAWA Hirofumi" , "Namjae Jeon" , "Sungjong Seo" , "Yuezhang Mo" , almaz.alexandrovich@paragon-software.com, "Viacheslav Dubeyko" , "John Paul Adrian Glaubitz" , frank.li@vivo.com, "Theodore Tso" , adilger.kernel@dilger.ca, "Carlos Maiolino" , "Steve French" , "Paulo Alcantara" , "Ronnie Sahlberg" , "Shyam Prasad N" , "Trond Myklebust" , "Anna Schumaker" , "Jaegeuk Kim" , "Chao Yu" , "Hans de Goede" , senozhatsky@chromium.org, "Chuck Lever" , "Roland Mainz" Message-Id: <04302551-3628-4036-9a3f-596cb782f5b7@app.fastmail.com> In-Reply-To: References: <20260507-case-sensitivity-v14-0-e62cc8200435@oracle.com> <20260507-case-sensitivity-v14-3-e62cc8200435@oracle.com> Subject: Re: [PATCH v14 03/15] fat: Implement fileattr_get for case sensitivity Content-Type: text/plain Content-Transfer-Encoding: 7bit On Wed, May 20, 2026, at 10:31 AM, Mark Brown wrote: > On Thu, May 07, 2026 at 04:52:56AM -0400, Chuck Lever wrote: >> From: Chuck Lever >> >> Report FAT's case sensitivity behavior via the FS_XFLAG_CASEFOLD >> and FS_XFLAG_CASENONPRESERVING flags. FAT filesystems are >> case-insensitive by default. >> >> MSDOS supports a 'nocase' mount option that enables case-sensitive >> behavior; check this option when reporting case sensitivity. >> >> VFAT long filename entries preserve case; without VFAT, only >> uppercased 8.3 short names are stored. MSDOS with 'nocase' also >> preserves case since the name-formatting code skips upcasing when >> 'nocase' is set. Check both options when reporting case preservation. > > I'm seeing a regression in -next with the LTP statx04 test which bisects > to this commit: > > tst_tmpdir.c:316: TINFO: Using /tmp/LTP_sta8hUyB4 as tmpdir (tmpfs > filesystem) > tst_device.c:98: TINFO: Found free device 0 '/dev/loop0' > tst_test.c:2047: TINFO: LTP version: 20260130 > tst_test.c:2050: TINFO: Tested kernel: 7.1.0-rc4-next-20260520 #1 SMP > PREEMPT @1779279361 aarch64 > > ... > > tst_test.c:1985: TINFO: === Testing on vfat === > tst_test.c:1290: TINFO: Formatting /dev/loop0 with vfat opts='' extra > opts='' > tst_test.c:1302: TINFO: Mounting /dev/loop0 to > /tmp/LTP_sta8hUyB4/mntpoint fstyp=vfat flags=0 > statx04.c:121: TFAIL: STATX_ATTR_COMPRESSED not supported > statx04.c:121: TFAIL: STATX_ATTR_APPEND not supported > statx04.c:121: TFAIL: STATX_ATTR_IMMUTABLE not supported > statx04.c:121: TFAIL: STATX_ATTR_NODUMP not supported At first blush, that does not seem like a plausible bisect result. This commit shouldn't affect the behavior of tmpfs in any way. -- Chuck Lever