diff --git a/block/blk-zoned.c b/block/blk-zoned.c index ee9c67121c6c..781caca0381e 100644 --- a/block/blk-zoned.c +++ b/block/blk-zoned.c @@ -115,6 +115,30 @@ const char *blk_zone_cond_str(enum blk_zone_cond zone_cond) } EXPORT_SYMBOL_GPL(blk_zone_cond_str); +struct disk_report_zones_cb_args { + struct gendisk *disk; + report_zones_cb user_cb; + void *user_data; +}; + +static void disk_zone_wplug_sync_wp_offset(struct gendisk *disk, + struct blk_zone *zone); + +static int disk_report_zones_cb(struct blk_zone *zone, unsigned int idx, + void *data) +{ + struct disk_report_zones_cb_args *args = data; + struct gendisk *disk = args->disk; + + if (disk->zone_wplugs_hash) + disk_zone_wplug_sync_wp_offset(disk, zone); + + if (!args->user_cb) + return 0; + + return args->user_cb(zone, idx, args->user_data); +} + /** * blkdev_report_zones - Get zones information * @bdev: Target block device @@ -694,6 +718,58 @@ static void disk_zone_wplug_set_wp_offset(struct gendisk *disk, spin_unlock_irqrestore(&zwplug->lock, flags); } +static unsigned int blk_zone_wp_offset(struct blk_zone *zone) +{ + switch (zone->cond) { + case BLK_ZONE_COND_IMP_OPEN: + case BLK_ZONE_COND_EXP_OPEN: + case BLK_ZONE_COND_CLOSED: + return zone->wp - zone->start; + case BLK_ZONE_COND_FULL: + return zone->len; + case BLK_ZONE_COND_EMPTY: + return 0; + case BLK_ZONE_COND_NOT_WP: + case BLK_ZONE_COND_OFFLINE: + case BLK_ZONE_COND_READONLY: + default: + /* + * Conventional, offline and read-only zones do not have a valid + * write pointer. + */ + return UINT_MAX; + } +} + +static void disk_zone_wplug_sync_wp_offset(struct gendisk *disk, + struct blk_zone *zone) +{ + struct blk_zone_wplug *zwplug; + unsigned long flags; + + zwplug = disk_get_zone_wplug(disk, zone->start); + if (!zwplug) + return; + + spin_lock_irqsave(&zwplug->lock, flags); + if (zwplug->flags & BLK_ZONE_WPLUG_ERROR) + disk_zone_wplug_set_wp_offset(disk, zwplug, + blk_zone_wp_offset(zone)); + spin_unlock_irqrestore(&zwplug->lock, flags); + + disk_put_zone_wplug(zwplug); +} + +static int disk_zone_sync_wp_offset(struct gendisk *disk, sector_t sector) +{ + struct disk_report_zones_cb_args args = { + .disk = disk, + }; + + return disk->fops->report_zones(disk, sector, 1, + disk_report_zones_cb, &args); +} + static bool blk_zone_wplug_handle_reset_or_finish(struct bio *bio, unsigned int wp_offset) { @@ -1280,29 +1356,6 @@ static void blk_zone_wplug_bio_work(struct work_struct *work) disk_put_zone_wplug(zwplug); } -static unsigned int blk_zone_wp_offset(struct blk_zone *zone) -{ - switch (zone->cond) { - case BLK_ZONE_COND_IMP_OPEN: - case BLK_ZONE_COND_EXP_OPEN: - case BLK_ZONE_COND_CLOSED: - return zone->wp - zone->start; - case BLK_ZONE_COND_FULL: - return zone->len; - case BLK_ZONE_COND_EMPTY: - return 0; - case BLK_ZONE_COND_NOT_WP: - case BLK_ZONE_COND_OFFLINE: - case BLK_ZONE_COND_READONLY: - default: - /* - * Conventional, offline and read-only zones do not have a valid - * write pointer. - */ - return UINT_MAX; - } -} - static int blk_zone_wplug_report_zone_cb(struct blk_zone *zone, unsigned int idx, void *data) { @@ -1866,6 +1919,48 @@ int blk_revalidate_disk_zones(struct gendisk *disk) } EXPORT_SYMBOL_GPL(blk_revalidate_disk_zones); +/** + * blk_zone_issue_zeroout - zero-fill a block range in a zone + * @bdev: blockdev to write + * @sector: start sector + * @nr_sects: number of sectors to write + * @gfp_mask: memory allocation flags (for bio_alloc) + * + * Description: + * Zero-fill a block range in a zone (@sector must be equal to the zone write + * pointer), handling potential errors due to the (initially unknown) lack of + * hardware offload (See blkdev_issue_zeroout()). + */ +int blk_zone_issue_zeroout(struct block_device *bdev, sector_t sector, + sector_t nr_sects, gfp_t gfp_mask) +{ + int ret; + + if (WARN_ON_ONCE(!bdev_is_zoned(bdev))) + return -EIO; + + ret = blkdev_issue_zeroout(bdev, sector, nr_sects, gfp_mask, + BLKDEV_ZERO_NOFALLBACK); + if (ret != -EOPNOTSUPP) + return ret; + + /* + * The failed call to blkdev_issue_zeroout() advanced the zone write + * pointer. Undo this using a report zone to update the zone write + * pointer to the correct current value. + */ + ret = disk_zone_sync_wp_offset(bdev->bd_disk, sector); + if (ret != 1) + return ret < 0 ? ret : -EIO; + + /* + * Retry without BLKDEV_ZERO_NOFALLBACK to force the fallback to a + * regular write with zero-pages. + */ + return blkdev_issue_zeroout(bdev, sector, nr_sects, gfp_mask, 0); +} +EXPORT_SYMBOL_GPL(blk_zone_issue_zeroout); + #ifdef CONFIG_BLK_DEBUG_FS int queue_zone_wplugs_show(void *data, struct seq_file *m) diff --git a/drivers/md/dm-zoned-reclaim.c b/drivers/md/dm-zoned-reclaim.c index d58db9a27e6c..76e2c6868548 100644 --- a/drivers/md/dm-zoned-reclaim.c +++ b/drivers/md/dm-zoned-reclaim.c @@ -76,9 +76,9 @@ static int dmz_reclaim_align_wp(struct dmz_reclaim *zrc, struct dm_zone *zone, * pointer and the requested position. */ nr_blocks = block - wp_block; - ret = blkdev_issue_zeroout(dev->bdev, - dmz_start_sect(zmd, zone) + dmz_blk2sect(wp_block), - dmz_blk2sect(nr_blocks), GFP_NOIO, 0); + ret = blk_zone_issue_zeroout(dev->bdev, + dmz_start_sect(zmd, zone) + dmz_blk2sect(wp_block), + dmz_blk2sect(nr_blocks), GFP_NOIO); if (ret) { dmz_dev_err(dev, "Align zone %u wp %llu to %llu (wp+%u) blocks failed %d", diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 08a727b40816..4dd698dad2d6 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -1421,6 +1421,9 @@ static inline bool bdev_zone_is_seq(struct block_device *bdev, sector_t sector) return is_seq; } +int blk_zone_issue_zeroout(struct block_device *bdev, sector_t sector, + sector_t nr_sects, gfp_t gfp_mask); + static inline unsigned int queue_dma_alignment(const struct request_queue *q) { return q->limits.dma_alignment;