mdev daemon workalike, written in pure rust
mdev and mdevd are uevent managers, they listen for kernel object userspace events and react according to a set of rules that are coded in their mdev.conf format.
Any uevent manager daemon has 4 primary components:
- A netlink listener, in our case netlink-sys provides us already some level of abstraction
- Something that parses the messages encoded in the netlink packets
- A set of rules on how to react to the events, we use the same mdev.conf format
- The actual code that reacts to the events according to the rules
- It matches events with rules
- [] It executes the actual action and make sure to log the results of it
┌─────────┐ ┌───────────┐
│ Linux │ Uevent Packets │ Netlink │ UEvents
│ Kernel ├────────────────►│ Listener ├─────────────────┐
│ │ │ │ ▼
└─────────┘ └───────────┘ ┌──────────┐
│ UEvent │
│ Daemon │
┌───────────┐ ┌───────────┐ └───────┬──┘
│ mdev.conf │ mdev lines │ Rules │ ▲ │
│ ├──────────────►│ Parser ├─────────────────┘ │
│ │ │ │ Rules │
└───────────┘ └───────────┘ ▼
┌────────────┐
│ Actions │
└────────────┘