From 8d78697293fced61b49d5a2fab8cfbc7642caa1f Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Thu, 2 Nov 2017 21:29:49 +0300 Subject: [PATCH] block: add REQ_DRV bit Set aside a bit in the request/bio flags for driver use. Signed-off-by: Christoph Hellwig Reviewed-by: Sagi Grimberg Reviewed-by: Hannes Reinecke Reviewed-by: Johannes Thumshirn Signed-off-by: Jens Axboe (cherry picked from commit 96222bcc732d0504363dc772637c50e53b4bd41e) --- include/linux/blk_types.h | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h index e157c8aef40d..86173bafcd39 100644 --- a/include/linux/blk_types.h +++ b/include/linux/blk_types.h @@ -234,6 +234,9 @@ enum req_flag_bits { /* command specific flags for REQ_OP_WRITE_ZEROES: */ __REQ_NOUNMAP, /* do not free blocks when zeroing */ + /* for driver use */ + __REQ_DRV, + __REQ_NR_BITS, /* stops here */ }; @@ -254,6 +257,8 @@ enum req_flag_bits { #define REQ_NOUNMAP (1ULL << __REQ_NOUNMAP) +#define REQ_DRV (1ULL << __REQ_DRV) + #define REQ_FAILFAST_MASK \ (REQ_FAILFAST_DEV | REQ_FAILFAST_TRANSPORT | REQ_FAILFAST_DRIVER)