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 0A23F1FF141 for ; Mon, 30 Mar 2026 16:10:37 +0200 (CEST) Received: from firstgate.proxmox.com (localhost [127.0.0.1]) by firstgate.proxmox.com (Proxmox) with ESMTP id 4EF5D32CC4; Mon, 30 Mar 2026 16:11:03 +0200 (CEST) From: Filip Schauer To: pve-devel@lists.proxmox.com Subject: [PATCH container/manager v2 0/7] implement per-mountpoint uid/gid mapping Date: Mon, 30 Mar 2026 16:10:11 +0200 Message-ID: <20260330141021.151921-1-f.schauer@proxmox.com> X-Mailer: git-send-email 2.47.3 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Bm-Milter-Handled: 55990f41-d878-4baa-be0a-ee34c49e34d2 X-Bm-Transport-Timestamp: 1774879772748 X-SPAM-LEVEL: Spam detection results: 0 AWL -1.489 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 RCVD_IN_VALIDITY_CERTIFIED_BLOCKED 1 ADMINISTRATOR NOTICE: The query to Validity was blocked. See https://knowledge.validity.com/hc/en-us/articles/20961730681243 for more information. RCVD_IN_VALIDITY_RPBL_BLOCKED 1 ADMINISTRATOR NOTICE: The query to Validity was blocked. See https://knowledge.validity.com/hc/en-us/articles/20961730681243 for more information. RCVD_IN_VALIDITY_SAFE_BLOCKED 1 ADMINISTRATOR NOTICE: The query to Validity was blocked. See https://knowledge.validity.com/hc/en-us/articles/20961730681243 for more information. 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: XNV4CIS775DFDVZLYPFSVIPXMK5PFTNH X-Message-ID-Hash: XNV4CIS775DFDVZLYPFSVIPXMK5PFTNH 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: Add support for configuring UID/GID mappings on individual container mount points without affecting the global container mapping. A new "idmap" mount point option accepts semicolon-separated mappings: ``` idmap=type:ct:host:len;type:ct:host:len;... ``` type: can be either 'u' or 'g' ct: ID as seen inside the container host: corresponding ID on the host len: number of consecutive IDs to map Unmapped ranges inherit the container's ID mapping. Example to pass through the host UID & GID 1005: ``` mp0: /mnt/data,mp=/data,idmap=u:1005:1005:1;g:1005:1005:1 ``` To identity-map the entire range of ids, "passthrough" can be used: ``` idmap=passthrough ``` Mount point idmapping only works for unprivileged containers. Privileged containers are unaffected. Build/Bump order: * pve-container * pve-manager Changes since v1: * Include $msg in error message in sync_send/sync_recv * Switch idmap from space-separated to semicolon-separated * Improve documentation of idmap option * Add 'idmap=passthrough' * Cache user namespace file descriptors in memory at container startup to avoid overhead of re-creating duplicates pve-container: Filip Schauer (5): namespaces: relax prototype of run_in_userns namespaces: refactor run_in_userns d/control: update versioned dependency for libpve-common-perl namespaces: add helper to create user namespace from idmap implement per-mountpoint uid/gid mapping debian/control | 2 +- src/PVE/LXC.pm | 96 +++++++++++++++++++++++++++++++++++++-- src/PVE/LXC/Config.pm | 39 ++++++++++++++++ src/PVE/LXC/Namespaces.pm | 63 ++++++++++++++++++++----- src/lxc-pve-prestart-hook | 23 ++++++++++ 5 files changed, 206 insertions(+), 17 deletions(-) pve-manager: Filip Schauer (2): ui: lxc/MPEdit: remove duplicate "mp" assignment ui: lxc/MPEdit: add "idmap" option www/manager6/lxc/MPEdit.js | 213 ++++++++++++++++++++++++++++++++++++- 1 file changed, 212 insertions(+), 1 deletion(-) Summary over all repositories: 6 files changed, 418 insertions(+), 18 deletions(-) -- Generated by git-murpp 0.6.0