From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from firstgate.proxmox.com (firstgate.proxmox.com [212.224.123.68]) by lore.proxmox.com (Postfix) with ESMTPS id AE7601FF136 for ; Mon, 23 Feb 2026 14:08:26 +0100 (CET) Received: from firstgate.proxmox.com (localhost [127.0.0.1]) by firstgate.proxmox.com (Proxmox) with ESMTP id 7C535BA52; Mon, 23 Feb 2026 14:09:21 +0100 (CET) From: Filip Schauer To: pve-devel@lists.proxmox.com Subject: [PATCH common 3/8] tools: add mount_setattr syscall Date: Mon, 23 Feb 2026 14:04:49 +0100 Message-ID: <20260223130706.90972-4-f.schauer@proxmox.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260223130706.90972-1-f.schauer@proxmox.com> References: <20260223130706.90972-1-f.schauer@proxmox.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Bm-Milter-Handled: 55990f41-d878-4baa-be0a-ee34c49e34d2 X-Bm-Transport-Timestamp: 1771852112688 X-SPAM-LEVEL: Spam detection results: 0 AWL 0.002 Adjusted score from AWL reputation of From: address BAYES_00 -1.9 Bayes spam probability is 0 to 1% DMARC_MISSING 0.1 Missing DMARC policy KAM_DMARC_STATUS 0.01 Test Rule for DKIM or SPF Failure with Strict Alignment SPF_HELO_NONE 0.001 SPF: HELO does not publish an SPF Record SPF_PASS -0.001 SPF: sender matches SPF record Message-ID-Hash: VBFUA6VISGO2R5VRZSNZBNFCSLR3N7BP X-Message-ID-Hash: VBFUA6VISGO2R5VRZSNZBNFCSLR3N7BP X-MailFrom: f.schauer@proxmox.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; loop; banned-address; emergency; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header X-Mailman-Version: 3.3.10 Precedence: list List-Id: Proxmox VE development discussion List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: The mount_setattr syscall can change attributes of an existing mount. Signed-off-by: Filip Schauer --- src/PVE/Syscall.pm | 1 + src/PVE/Tools.pm | 9 +++++++++ 2 files changed, 10 insertions(+) diff --git a/src/PVE/Syscall.pm b/src/PVE/Syscall.pm index a5753d9..53e0f4b 100644 --- a/src/PVE/Syscall.pm +++ b/src/PVE/Syscall.pm @@ -27,6 +27,7 @@ BEGIN { renameat2 => &SYS_renameat2, open_tree => &SYS_open_tree, move_mount => &SYS_move_mount, + mount_setattr => &SYS_mount_setattr, fsopen => &SYS_fsopen, fsconfig => &SYS_fsconfig, fsmount => &SYS_fsmount, diff --git a/src/PVE/Tools.pm b/src/PVE/Tools.pm index d226fb6..5b15874 100644 --- a/src/PVE/Tools.pm +++ b/src/PVE/Tools.pm @@ -1682,6 +1682,15 @@ sub move_mount($$$$$) { ); } +sub mount_setattr($$$$$$$) { + my ($dirfd, $path, $flags, $attr_set, $attr_clr, $propagation, $userns_fd) = @_; + + my $attr = pack("Q4", $attr_set, $attr_clr, $propagation, $userns_fd); + return 0 == + syscall(&PVE::Syscall::mount_setattr, int($dirfd), $path, int($flags), $attr, + length($attr)); +} + sub fsopen($$) { my ($fsname, $flags) = @_; return PVE::Syscall::file_handle_result(syscall(&PVE::Syscall::fsopen, $fsname, int($flags))); -- 2.47.3