[PATCH 5.18 1017/1095] block: add a bdev_max_zone_append_sectors helper

From: Greg Kroah-Hartman
Date: Mon Aug 15 2022 - 19:25:07 EST


From: Christoph Hellwig <hch@xxxxxx>

[ Upstream commit 2aba0d19f4d8c8929b4b3b94a9cfde2aa20e6ee2 ]

Add a helper to check the max supported sectors for zone append based on
the block_device instead of having to poke into the block layer internal
request_queue.

Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Acked-by: Damien Le Moal <damien.lemoal@xxxxxxxxxxxxxxxxxx>
Reviewed-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@xxxxxxx>
Reviewed-by: Chaitanya Kulkarni <kch@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20220415045258.199825-16-hch@xxxxxx
Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/nvme/target/zns.c | 3 +--
fs/zonefs/super.c | 3 +--
include/linux/blkdev.h | 6 ++++++
3 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/nvme/target/zns.c b/drivers/nvme/target/zns.c
index e34718b09550..82b61acf7a72 100644
--- a/drivers/nvme/target/zns.c
+++ b/drivers/nvme/target/zns.c
@@ -34,8 +34,7 @@ static int validate_conv_zones_cb(struct blk_zone *z,

bool nvmet_bdev_zns_enable(struct nvmet_ns *ns)
{
- struct request_queue *q = ns->bdev->bd_disk->queue;
- u8 zasl = nvmet_zasl(queue_max_zone_append_sectors(q));
+ u8 zasl = nvmet_zasl(bdev_max_zone_append_sectors(ns->bdev));
struct gendisk *bd_disk = ns->bdev->bd_disk;
int ret;

diff --git a/fs/zonefs/super.c b/fs/zonefs/super.c
index 15a4c7c07a3b..b68798a572fc 100644
--- a/fs/zonefs/super.c
+++ b/fs/zonefs/super.c
@@ -723,13 +723,12 @@ static ssize_t zonefs_file_dio_append(struct kiocb *iocb, struct iov_iter *from)
struct inode *inode = file_inode(iocb->ki_filp);
struct zonefs_inode_info *zi = ZONEFS_I(inode);
struct block_device *bdev = inode->i_sb->s_bdev;
- unsigned int max;
+ unsigned int max = bdev_max_zone_append_sectors(bdev);
struct bio *bio;
ssize_t size;
int nr_pages;
ssize_t ret;

- max = queue_max_zone_append_sectors(bdev_get_queue(bdev));
max = ALIGN_DOWN(max << SECTOR_SHIFT, inode->i_sb->s_blocksize);
iov_iter_truncate(from, max);

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index cc6b24a5098f..34f2b88dfd6e 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1190,6 +1190,12 @@ static inline unsigned int queue_max_zone_append_sectors(const struct request_qu
return min(l->max_zone_append_sectors, l->max_sectors);
}

+static inline unsigned int
+bdev_max_zone_append_sectors(struct block_device *bdev)
+{
+ return queue_max_zone_append_sectors(bdev_get_queue(bdev));
+}
+
static inline unsigned queue_logical_block_size(const struct request_queue *q)
{
int retval = 512;
--
2.35.1