From: Gao Xiang <hsiangkao@linux.alibaba.com>
To: Giuseppe Scrivano <gscrivan@redhat.com>, linux-erofs@lists.ozlabs.org
Cc: linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH v2] erofs: accept source file descriptor via fsconfig
Date: Mon, 13 Jul 2026 11:57:00 +0800 [thread overview]
Message-ID: <008358ad-beef-4086-a423-0b282746ebb2@linux.alibaba.com> (raw)
In-Reply-To: <20260711071137.4130824-1-gscrivan@redhat.com>
On 2026/7/11 15:10, Giuseppe Scrivano wrote:
> Add fsparam_fd("source") so that userspace can pass an already-opened
> file descriptor instead of a path string. When the fd is provided via
> fsconfig(FSCONFIG_SET_FD, "source", NULL, fd), it is stored directly
> in sbi->dif0.file and erofs_fc_get_tree() skips the filp_open() call.
>
> This is useful for mount namespaces where the backing file may not be
> reachable by path, and for tools that already hold an fd to the image
> (e.g. composefs reusing an erofs mount's backing file).
>
> Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
Reviewed-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Thanks,
Gao Xiang
next prev parent reply other threads:[~2026-07-13 3:57 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-11 7:10 [PATCH v2] erofs: accept source file descriptor via fsconfig Giuseppe Scrivano
2026-07-13 3:57 ` Gao Xiang [this message]
2026-07-13 4:52 ` Aleksa Sarai
2026-07-13 5:45 ` Gao Xiang
2026-07-13 8:06 ` Giuseppe Scrivano
2026-07-13 8:33 ` Aleksa Sarai
2026-07-13 10:24 ` Giuseppe Scrivano
2026-07-14 0:49 ` Aleksa Sarai
2026-07-14 1:56 ` Gao Xiang
2026-07-14 6:36 ` Giuseppe Scrivano
2026-07-14 6:45 ` Gao Xiang
2026-07-14 10:09 ` Giuseppe Scrivano
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