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authorDamien Le Moal <damien.lemoal@hgst.com>2016-10-18 09:40:29 +0300
committerJens Axboe <axboe@fb.com>2016-10-18 19:02:00 +0300
commit797476b88bde2a6001f9552f383f147e58c1a330 (patch)
tree607e6d6bea27aa9d9cb7bb86ce7da557ddee72e1 /block/blk-settings.c
parent14155cafeadda946376260e2ad5d39a0528a332f (diff)
downloadlinux-797476b88bde2a6001f9552f383f147e58c1a330.tar.xz
block: Add 'zoned' queue limit
Add the zoned queue limit to indicate the zoning model of a block device. Defined values are 0 (BLK_ZONED_NONE) for regular block devices, 1 (BLK_ZONED_HA) for host-aware zone block devices and 2 (BLK_ZONED_HM) for host-managed zone block devices. The standards defined drive managed model is not defined here since these block devices do not provide any command for accessing zone information. Drive managed model devices will be reported as BLK_ZONED_NONE. The helper functions blk_queue_zoned_model and bdev_zoned_model return the zoned limit and the functions blk_queue_is_zoned and bdev_is_zoned return a boolean for callers to test if a block device is zoned. The zoned attribute is also exported as a string to applications via sysfs. BLK_ZONED_NONE shows as "none", BLK_ZONED_HA as "host-aware" and BLK_ZONED_HM as "host-managed". Signed-off-by: Damien Le Moal <damien.lemoal@hgst.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Reviewed-by: Shaun Tancheff <shaun.tancheff@seagate.com> Tested-by: Shaun Tancheff <shaun.tancheff@seagate.com> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block/blk-settings.c')
-rw-r--r--block/blk-settings.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/block/blk-settings.c b/block/blk-settings.c
index f679ae122843..b1d5b7fa4d07 100644
--- a/block/blk-settings.c
+++ b/block/blk-settings.c
@@ -107,6 +107,7 @@ void blk_set_default_limits(struct queue_limits *lim)
lim->io_opt = 0;
lim->misaligned = 0;
lim->cluster = 1;
+ lim->zoned = BLK_ZONED_NONE;
}
EXPORT_SYMBOL(blk_set_default_limits);