[PATCH 1/4] block: add req op to reset all zones and flag

[Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>]

This patch introduces a new request operation REQ_OP_ZONE_RESET_ALL.
This is useful for the applications like mkfs where it needs to reset
all the zones present on the underlying block device. As part for this
patch we also introduce new QUEUE_FLAG_ZONE_RESETALL which indicates the
queue zone reset all capability and corresponding helper macro.

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
---
 include/linux/blk_types.h | 2 ++
 include/linux/blkdev.h    | 3 +++
 2 files changed, 5 insertions(+)

diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
index feff3fe4467e..3991b580d6bd 100644
--- a/include/linux/blk_types.h
+++ b/include/linux/blk_types.h
@@ -282,6 +282,8 @@ enum req_opf {
 	REQ_OP_ZONE_RESET	= 6,
 	/* write the same sector many times */
 	REQ_OP_WRITE_SAME	= 7,
+	/* reset all the zone present on the device */
+	REQ_OP_ZONE_RESET_ALL	= 8,
 	/* write the zero filled sector many times */
 	REQ_OP_WRITE_ZEROES	= 9,
 
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 1ef375dafb1c..474008bffee2 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -611,6 +611,7 @@ struct request_queue {
 #define QUEUE_FLAG_SCSI_PASSTHROUGH 23	/* queue supports SCSI commands */
 #define QUEUE_FLAG_QUIESCED	24	/* queue has been quiesced */
 #define QUEUE_FLAG_PCI_P2PDMA	25	/* device supports PCI p2p requests */
+#define QUEUE_FLAG_ZONE_RESETALL 26	/* supports Zone Reset All */
 
 #define QUEUE_FLAG_MQ_DEFAULT	((1 << QUEUE_FLAG_IO_STAT) |		\
 				 (1 << QUEUE_FLAG_SAME_COMP))
@@ -630,6 +631,8 @@ bool blk_queue_flag_test_and_set(unsigned int flag, struct request_queue *q);
 #define blk_queue_io_stat(q)	test_bit(QUEUE_FLAG_IO_STAT, &(q)->queue_flags)
 #define blk_queue_add_random(q)	test_bit(QUEUE_FLAG_ADD_RANDOM, &(q)->queue_flags)
 #define blk_queue_discard(q)	test_bit(QUEUE_FLAG_DISCARD, &(q)->queue_flags)
+#define blk_queue_zone_resetall(q)	\
+	test_bit(QUEUE_FLAG_ZONE_RESETALL, &(q)->queue_flags)
 #define blk_queue_secure_erase(q) \
 	(test_bit(QUEUE_FLAG_SECERASE, &(q)->queue_flags))
 #define blk_queue_dax(q)	test_bit(QUEUE_FLAG_DAX, &(q)->queue_flags)
-- 
2.17.0