From: Daniel Tang <danielzgtg.opensource@gmail.com>
To: "André Almeida" <andrealmeid@igalia.com>,
"Gabriel Krisman Bertazi" <gabriel@krisman.be>,
"Gabriel Krisman Bertazi" <krisman@suse.de>,
"Christian Brauner" <brauner@kernel.org>,
linux-fsdevel@vger.kernel.org
Cc: Gabriel Krisman Bertazi <krisman@kernel.org>,
Alexander Viro <viro@zeniv.linux.org.uk>, Jan Kara <jack@suse.cz>,
Theodore Ts'o <tytso@mit.edu>,
Andreas Dilger <adilger.kernel@dilger.ca>,
Hugh Dickins <hughd@google.com>,
Andrew Morton <akpm@linux-foundation.org>,
Jonathan Corbet <corbet@lwn.net>,
smcv@collabora.com, kernel-dev@igalia.com,
linux-kernel@vger.kernel.org, linux-ext4@vger.kernel.org,
linux-mm@kvack.org, linux-doc@vger.kernel.org
Subject: [BUG] Is casefold unreported in /proc/mounts?
Date: Sun, 27 Sep 2026 02:02:29 -0400 [thread overview]
Message-ID: <5193732.31r3eYUQgx@daniel-desktop3> (raw)
In-Reply-To: <20241021-tonyk-tmpfs-v8-6-f443d5814194@igalia.com>
Upon successfully mounting via `sudo mount -t tmpfs -o casefold test /mnt`, I
cannot find a read-only way to determine whether this option is enabled.
`mount`, `cat /proc/mounts`, and `cat /proc/mountinfo` only display "rw",
"relatime", and "inode64", never "casefold" for both with and without
`-o casefold`. The only way on 7.0.0-34-generic to test I found is
`mkdir test ; chattr +F test ; echo $?`, but that isn't atomic. Which command
can determine, without writing anything, whether someone or some program
specified `-o casefold`? If absent, I suggest adding the missing info to
`/proc/mounts`, likely `mm/shmem.c:shmem_show_options`.
Link: https://lore.kernel.org/r/20241021-tonyk-tmpfs-v8-6-f443d5814194@igalia.com
next prev parent reply other threads:[~2026-09-27 6:02 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-10-21 16:37 [PATCH v8 0/9] tmpfs: Add case-insensitive support for tmpfs André Almeida
2024-10-21 16:37 ` [PATCH v8 1/9] libfs: Create the helper function generic_ci_validate_strict_name() André Almeida
2024-10-21 16:37 ` [PATCH v8 2/9] ext4: Use generic_ci_validate_strict_name helper André Almeida
2024-10-21 16:37 ` [PATCH v8 3/9] unicode: Export latest available UTF-8 version number André Almeida
2024-10-21 16:37 ` [PATCH v8 4/9] unicode: Recreate utf8_parse_version() André Almeida
2024-10-21 16:37 ` [PATCH v8 5/9] libfs: Export generic_ci_ dentry functions André Almeida
2024-10-21 16:37 ` [PATCH v8 6/9] tmpfs: Add casefold lookup support André Almeida
2026-09-27 6:02 ` Daniel Tang [this message]
2026-09-27 7:02 ` [BUG] Is casefold unreported in /proc/mounts? Gabriel Krisman Bertazi
2024-10-21 16:37 ` [PATCH v8 7/9] tmpfs: Add flag FS_CASEFOLD_FL support for tmpfs dirs André Almeida
2024-10-21 16:37 ` [PATCH v8 8/9] tmpfs: Expose filesystem features via sysfs André Almeida
2024-10-31 5:18 ` Nathan Chancellor
2024-10-31 17:31 ` André Almeida
2024-10-31 18:13 ` Nathan Chancellor
2024-10-31 19:11 ` André Almeida
2024-10-21 16:37 ` [PATCH v8 9/9] docs: tmpfs: Add casefold options André Almeida
2024-10-28 12:37 ` [PATCH v8 0/9] tmpfs: Add case-insensitive support for tmpfs Christian Brauner
2024-10-28 13:58 ` André Almeida
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