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diff --git a/docs/kernel/filesystem/device_inode.rst b/docs/kernel/filesystem/device_inode.rst new file mode 100644 index 00000000..cf5e72fa --- /dev/null +++ b/docs/kernel/filesystem/device_inode.rst @@ -0,0 +1,19 @@ +Device Inodes +============= + +Device inodes are filesystem inodes that represent a device in the system. +They may be created from either a device, or by reconstituting a persistent device inode from a filesystem. + +An example for device inodes created to directly represent devices are the entries in the devfs (/dev) filesystem. +Entries in this filesystem are generally created and removed based on devices appearing in and being removed from the system. + +An example for device inodes reconstituted from persisted inodes can be found in the inodes supported by the ext2 filesystem. +In that filesystem, an inode may represent a device, using a device identification number. +When accessing such an inode, a device inode needs to be reconstituted from the persisted device inode in order to resolve which device, if any, it refers to. +However, any file operations (e.g. `stat`) need to be forwarded to the persisted inode. + +API Reference +------------- + +.. doxygenstruct:: kernel::filesystem::device_inode + :members:
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