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Device Instances, Properties, and Configuration Files (cont)
Device Special Files:
- Driver specifies file system node names using ddi_create_minor_node(9F)
- Actual device special files are stored under /devices
- The /devices file system tree represents the internal
dev info tree
- Bus nexus nodes are represented by directories under /devices
- Leaf nodes are represented by special files in those directories
- Entries in traditional /dev directory are symbolic
links into /devices
- Current Implementation:
- /devices is part of the root file system
- During a "reconfiguration reboot"
- Utility programs read the internal dev info tree and create corresponding device nodes in /devices
- Utility programs create symbolic links in /dev
- Entries in /dev and /devices persist across a reboot
- See Also: drvconfig(1M), add_drv(1M), disks(1M), tapes(1M),
devlinks(1M)
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