From 61fdb4acc8411bf50589bc67431ad12e21e7678a Mon Sep 17 00:00:00 2001 From: Nicholas Bellinger Date: Sat, 14 Feb 2015 02:29:50 +0000 Subject: target: Fail UNMAP when emulate_tpu=0 This patch adds a check within sbc_parse_cdb() to fail a UNMAP op, if the backend device has emulate_tpu disabled. Cc: Martin Petersen Cc: Christoph Hellwig Signed-off-by: Nicholas Bellinger --- drivers/target/target_core_sbc.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'drivers/target') diff --git a/drivers/target/target_core_sbc.c b/drivers/target/target_core_sbc.c index 0d307c34f08e..9661a6626b2d 100644 --- a/drivers/target/target_core_sbc.c +++ b/drivers/target/target_core_sbc.c @@ -962,6 +962,11 @@ sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops) if (!ops->execute_unmap) return TCM_UNSUPPORTED_SCSI_OPCODE; + if (!dev->dev_attrib.emulate_tpu) { + pr_err("Got UNMAP, but backend device has" + " emulate_tpu disabled\n"); + return TCM_UNSUPPORTED_SCSI_OPCODE; + } size = get_unaligned_be16(&cdb[7]); cmd->execute_cmd = ops->execute_unmap; break; -- cgit v1.2.3-59-g8ed1b