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authorChaitanya Kulkarni <chaitanya.kulkarni@wdc.com>2019-08-01 10:26:36 -0700
committerJens Axboe <axboe@kernel.dk>2019-08-04 21:41:29 -0600
commit6e33dbf280d60db8c1c11dbf99c0bc475946f9c8 (patch)
tree94c560cca9c4f000b07bdb21ec45b7a759778feb /block/blk-zoned.c
parente84e8f0663956f45c747df5629046794cff93893 (diff)
downloadlinux-6e33dbf280d60db8c1c11dbf99c0bc475946f9c8.tar.bz2
blk-zoned: implement REQ_OP_ZONE_RESET_ALL
This implements REQ_OP_ZONE_RESET_ALL as a special case of the block device zone reset operations where we just simply issue bio with the newly introduced req op. We issue this req op when the number of sectors is equal to the device's partition's number of sectors and device has no partitions. We also add support so that blk_op_str() can print the new reset-all zone operation. This patch also adds a generic make request check for newly introduced REQ_OP_ZONE_RESET_ALL req_opf. We simply return error when queue is zoned and reset-all flag is not set for REQ_OP_ZONE_RESET_ALL. Reviewed-by: Hannes Reinecke <hare@suse.com> Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com> Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-zoned.c')
-rw-r--r--block/blk-zoned.c39
1 files changed, 39 insertions, 0 deletions
diff --git a/block/blk-zoned.c b/block/blk-zoned.c
index 6c503824ba3f..4bc5f260248a 100644
--- a/block/blk-zoned.c
+++ b/block/blk-zoned.c
@@ -202,6 +202,42 @@ int blkdev_report_zones(struct block_device *bdev, sector_t sector,
}
EXPORT_SYMBOL_GPL(blkdev_report_zones);
+/*
+ * Special case of zone reset operation to reset all zones in one command,
+ * useful for applications like mkfs.
+ */
+static int __blkdev_reset_all_zones(struct block_device *bdev, gfp_t gfp_mask)
+{
+ struct bio *bio = bio_alloc(gfp_mask, 0);
+ int ret;
+
+ /* across the zones operations, don't need any sectors */
+ bio_set_dev(bio, bdev);
+ bio_set_op_attrs(bio, REQ_OP_ZONE_RESET_ALL, 0);
+
+ ret = submit_bio_wait(bio);
+ bio_put(bio);
+
+ return ret;
+}
+
+static inline bool blkdev_allow_reset_all_zones(struct block_device *bdev,
+ sector_t nr_sectors)
+{
+ if (!blk_queue_zone_resetall(bdev_get_queue(bdev)))
+ return false;
+
+ if (nr_sectors != part_nr_sects_read(bdev->bd_part))
+ return false;
+ /*
+ * REQ_OP_ZONE_RESET_ALL can be executed only if the block device is
+ * the entire disk, that is, if the blocks device start offset is 0 and
+ * its capacity is the same as the entire disk.
+ */
+ return get_start_sect(bdev) == 0 &&
+ part_nr_sects_read(bdev->bd_part) == get_capacity(bdev->bd_disk);
+}
+
/**
* blkdev_reset_zones - Reset zones write pointer
* @bdev: Target block device
@@ -235,6 +271,9 @@ int blkdev_reset_zones(struct block_device *bdev,
/* Out of range */
return -EINVAL;
+ if (blkdev_allow_reset_all_zones(bdev, nr_sectors))
+ return __blkdev_reset_all_zones(bdev, gfp_mask);
+
/* Check alignment (handle eventual smaller last zone) */
zone_sectors = blk_queue_zone_sectors(q);
if (sector & (zone_sectors - 1))