X-Git-Url: https://git.kernel.dk/?a=blobdiff_plain;f=drivers%2Fblock%2FKconfig;h=5b9d4aaebb81d48550db8b09cb6a2ce9fe38e6b2;hb=2d786e66c9662d84cbeab981ce3a371d2fb5a4bb;hp=f79f20430ef7a403a52d513f038316815a98b100;hpb=26a42b614eb934f400cd3d1cc0b7fa1955ae3320;p=linux-block.git

diff --git a/drivers/block/Kconfig b/drivers/block/Kconfig
index f79f20430ef7..5b9d4aaebb81 100644
--- a/drivers/block/Kconfig
+++ b/drivers/block/Kconfig
@@ -385,6 +385,23 @@ config BLK_DEV_UBLK
 	  can handle batch more effectively, but task_work_add() isn't exported
 	  for module, so ublk has to be built to kernel.
 
+config BLKDEV_UBLK_LEGACY_OPCODES
+	bool "Support legacy command opcode"
+	depends on BLK_DEV_UBLK
+	default y
+	help
+	  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.
+
 source "drivers/block/rnbd/Kconfig"
 
 endif # BLK_DEV