superseded: [PATCH common/container/manager 0/8] implement per-mountpoint uid/gid mapping

[Filip Schauer <f.schauer@proxmox.com>]

Superseded by:
https://lore.proxmox.com/pve-devel/20260330141021.151921-1-f.schauer@proxmox.com/

On 23/02/2026 14:07, Filip Schauer wrote:
> 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 space-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
> ```
>
> This allows, for example, passing through a directory owned by a
> specific user on the host to a specific user inside the container,
> without changing the ownership on the host or configuring an ID mapping
> for the entire container.
>
> Build/Bump order:
> * pve-common
> * pve-container
> * pve-manager
>
> pve-common:
>
> Filip Schauer (3):
>    tools: export O_CLOEXEC constant
>    syscall: add missing mount attribute constants
>    tools: add mount_setattr syscall
>
>   src/PVE/Syscall.pm |  3 +++
>   src/PVE/Tools.pm   | 10 ++++++++++
>   2 files changed, 13 insertions(+)
>
>
> pve-container:
>
> Filip Schauer (4):
>    namespaces: relax prototype of run_in_userns
>    namespaces: refactor run_in_userns
>    namespaces: add helper to create user namespace from idmap
>    implement per-mountpoint uid/gid mapping
>
>   src/PVE/LXC.pm            | 85 ++++++++++++++++++++++++++++++++++++++-
>   src/PVE/LXC/Config.pm     |  7 ++++
>   src/PVE/LXC/Namespaces.pm | 63 ++++++++++++++++++++++++-----
>   src/lxc-pve-prestart-hook | 14 +++++++
>   4 files changed, 157 insertions(+), 12 deletions(-)
>
>
> pve-manager:
>
> Filip Schauer (1):
>    ui: lxc/MPEdit: add "idmap" option
>
>   www/manager6/lxc/MPEdit.js | 203 +++++++++++++++++++++++++++++++++++++
>   1 file changed, 203 insertions(+)
>
>
> Summary over all repositories:
>    7 files changed, 373 insertions(+), 12 deletions(-)
>