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CONFIG_BLKDEV_UBLK_LEGACY_OPCODES: Support legacy command opcode

General informations

The Linux kernel configuration item CONFIG_BLKDEV_UBLK_LEGACY_OPCODES:

Help text

ublk driver started to take plain command encoding, which turns out one bad way. The traditional ioctl command opcode encodes more info and basically defines each code uniquely, so opcode conflict is avoided, and driver can handle wrong command easily, meantime it may help security subsystem to audit io_uring command.

Say Y if your application still uses legacy command opcode.

Say N if you don't want to support legacy command opcode. It is suggested to enable N if your application(ublk server) switches to ioctl command encoding.



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