[PATCH v11 08/12] landlock: Add network rules and TCP hooks support

[Mickaël Salaün]

On 27/06/2023 18:14, Mickaël Salaün wrote:
> 
> On 15/05/2023 18:13, Konstantin Meskhidze wrote:
>> This commit adds network rules support in the ruleset management
>> helpers and the landlock_create_ruleset syscall.
>> Refactor user space API to support network actions. Add new network
>> access flags, network rule and network attributes. Increment Landlock
>> ABI version. Expand access_masks_t to u32 to be sure network access
>> rights can be stored. Implement socket_bind() and socket_connect()
>> LSM hooks, which enables to restrict TCP socket binding and connection
>> to specific ports.

It is important to explain the decision rationales. Please explain new 
types, something like this:

The new landlock_net_port_attr structure has two fields. The 
allowed_access field contains the LANDLOCK_ACCESS_NET_* rights. The port 
field contains the port value according to the the allowed protocol. 
This field can take up to a 64-bit value [1] but the maximum value 
depends on the related protocol (e.g. 16-bit for TCP).

[1] 
https://lore.kernel.org/r/278ab07f-7583-a4e0-3d37-1bacd091531d@digikod.net