[Verse 1] In the kernel space where hardware meets code Three driver types share the system load Character streams flow one byte at a time Block devices chunk data in organized lines Network packets dance through protocol stacks Each driver type has different tracks [Chorus] Char Block Network - remember the three C-B-N for device harmony Hierarchies climb from bus to device Driver model keeps everything nice Register probe remove and bind Device tree structure in your mind [Verse 2] Character drivers read and write in streams Keyboards and mice fulfill their dreams Sequential access through file operations Open close read write across all nations Buffer management keeps the data flowing User space applications never knowing [Chorus] Char Block Network - remember the three C-B-N for device harmony Hierarchies climb from bus to device Driver model keeps everything nice Register probe remove and bind Device tree structure in your mind [Verse 3] Block devices serve up sectors and chunks Hard drives and SSDs store data in bunks Random access through the block layer Request queues act as the middleman player Elevator algorithms sort the requests Minimizing seeks for performance tests [Bridge] Device model hierarchy starts with the bus Platform PCI USB without any fuss Drivers bind to devices through matching rules Compatible strings and ID comparison tools Probe function called when devices appear Remove function cleans when they disappear [Verse 4] Network drivers handle packets in flight Ethernet WiFi keeping connections tight Socket buffers carry frames up the stack Protocol layers add headers front and back Interrupt handling keeps the data moving Network performance always improving [Chorus] Char Block Network - remember the three C-B-N for device harmony Hierarchies climb from bus to device Driver model keeps everything nice Register probe remove and bind Device tree structure in your mind [Outro] From hardware up to application space Driver types keep everything in place Linux device model shows the way Three driver types rule the day
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