From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B181D258ED8; Wed, 29 Oct 2025 00:53:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761699229; cv=none; b=fJVTpKzG9L5R8MDxsz3k1oVAyiZy27eozduIwmUNXDYsWHVVVveDqjJxJ18rt0G4Wxf5Cm0WbTP4fUw1IePjG3yFoO+Xt3t1CcQ/CVeIbLqxnQ21CsBLdWNvwYmgTjMbDiNuGLOvXbnnJnI+cF+ai0bNgKFRl2vuDDuMwUiEFSk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761699229; c=relaxed/simple; bh=7UyKwmQWCYOx4e5AlpdWMfU2fJHRvGky24j+s8UyFBQ=; h=Date:Subject:From:To:Cc:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=H2jLZ032F85bXoYhh+JUCylyXX8dJfKZGLvs/hLSFephRoptIGMb3atdZHRb0ki1FzgkxQdwjiA6sxlAzasdI05KTRRBeD0/HHfYeDlHHB5sRaggxWALraVgGOOJKyj30zLBJf4r8Xz98PpBNhT+hQ5CtKO25r1A48C2yp9L7OI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=PkGfBqVq; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="PkGfBqVq" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8082DC4CEE7; Wed, 29 Oct 2025 00:53:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1761699229; bh=7UyKwmQWCYOx4e5AlpdWMfU2fJHRvGky24j+s8UyFBQ=; h=Date:Subject:From:To:Cc:In-Reply-To:References:From; b=PkGfBqVq+7EGXPbbaGIwY3bNmUuAjcTBHhRIWdwsTlqaviKCDmrZQoUYnb66bfHCf IRLKaDfCA0GxknyFGafDhPjWShQapGytRLAW4faqW8zlk+4MLLaPSvffQAcZ0bYNN6 8fcvnN2QvYN4AvVr8qNVksCS6qc5YuUQnWOCGRuKQgf9ze9ZQeZmN9WL1+dQkVzhoT qM+Rl8GX6Do+wI92XokVwiJPHR+ESi7c3ycd4+sxPP29rgkJZsA7hAAlvn9kunBs1U fG+YK2l4bw4NNaRWBFGnpwrLF19ZPg+Ole5y44F0gAoNS3h2tu8E31pazykyoeDaAh +zVeZWbY70UiA== Date: Tue, 28 Oct 2025 17:53:49 -0700 Subject: [PATCH 3/3] fuse: allow setting of root nodeid From: "Darrick J. Wong" To: djwong@kernel.org, miklos@szeredi.hu Cc: joannelkoong@gmail.com, bernd@bsbernd.com, neal@gompa.dev, linux-ext4@vger.kernel.org, linux-fsdevel@vger.kernel.org Message-ID: <176169811312.1426070.16457653864288378906.stgit@frogsfrogsfrogs> In-Reply-To: <176169811231.1426070.12996939158894110793.stgit@frogsfrogsfrogs> References: <176169811231.1426070.12996939158894110793.stgit@frogsfrogsfrogs> Precedence: bulk X-Mailing-List: linux-ext4@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit From: Darrick J. Wong Provide a new mount option so that fuse servers can actually set the root nodeid. Signed-off-by: "Darrick J. Wong" --- fs/fuse/fuse_i.h | 2 ++ fs/fuse/inode.c | 11 +++++++++++ 2 files changed, 13 insertions(+) diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h index 4157dba6cba27c..b599e467146d33 100644 --- a/fs/fuse/fuse_i.h +++ b/fs/fuse/fuse_i.h @@ -626,6 +626,7 @@ struct fuse_fs_context { int fd; struct file *file; unsigned int rootmode; + u64 root_nodeid; kuid_t user_id; kgid_t group_id; bool is_bdev:1; @@ -639,6 +640,7 @@ struct fuse_fs_context { bool no_control:1; bool no_force_umount:1; bool legacy_opts_show:1; + bool root_nodeid_present:1; enum fuse_dax_mode dax_mode; unsigned int max_read; unsigned int blksize; diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c index 5f0c7032e691a6..955c1b23b1f9cb 100644 --- a/fs/fuse/inode.c +++ b/fs/fuse/inode.c @@ -802,6 +802,7 @@ enum { OPT_ALLOW_OTHER, OPT_MAX_READ, OPT_BLKSIZE, + OPT_ROOT_NODEID, OPT_ERR }; @@ -816,6 +817,7 @@ static const struct fs_parameter_spec fuse_fs_parameters[] = { fsparam_u32 ("max_read", OPT_MAX_READ), fsparam_u32 ("blksize", OPT_BLKSIZE), fsparam_string ("subtype", OPT_SUBTYPE), + fsparam_u64 ("root_nodeid", OPT_ROOT_NODEID), {} }; @@ -911,6 +913,11 @@ static int fuse_parse_param(struct fs_context *fsc, struct fs_parameter *param) ctx->blksize = result.uint_32; break; + case OPT_ROOT_NODEID: + ctx->root_nodeid = result.uint_64; + ctx->root_nodeid_present = true; + break; + default: return -EINVAL; } @@ -946,6 +953,8 @@ static int fuse_show_options(struct seq_file *m, struct dentry *root) seq_printf(m, ",max_read=%u", fc->max_read); if (sb->s_bdev && sb->s_blocksize != FUSE_DEFAULT_BLKSIZE) seq_printf(m, ",blksize=%lu", sb->s_blocksize); + if (fc->root_nodeid && fc->root_nodeid != FUSE_ROOT_ID) + seq_printf(m, ",root_nodeid=%llu", fc->root_nodeid); } #ifdef CONFIG_FUSE_DAX if (fc->dax_mode == FUSE_DAX_ALWAYS) @@ -2002,6 +2011,8 @@ int fuse_fill_super_common(struct super_block *sb, struct fuse_fs_context *ctx) sb->s_flags |= SB_POSIXACL; fc->default_permissions = ctx->default_permissions; + if (ctx->root_nodeid_present) + fc->root_nodeid = ctx->root_nodeid; fc->allow_other = ctx->allow_other; fc->user_id = ctx->user_id; fc->group_id = ctx->group_id;