block: add a bdev_max_zone_append_sectors helper

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@lst.de>
Acked-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Link: https://lore.kernel.org/r/20220415045258.199825-16-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/drivers/nvme/target/zns.c b/drivers/nvme/target/zns.c
index e34718b..82b61ac 100644 (file)
--- 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 3614c78..7a63807 100644 (file)
--- a/fs/zonefs/super.c
+++ b/fs/zonefs/super.c
@@ -678,13 +678,12 @@ 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 a433798..f8c50b7 100644 (file)
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1188,6 +1188,12 @@ 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;