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The write pointer in NVMe ZNS is invalid for a zone in zone state full. The same also holds true for ZAC/ZBC. The current behavior for NVMe is to simply propagate the wp reported by the drive, even for full zones. Since the wp is invalid for a full zone, the wp reported by the drive may be any value. The way that the sd_zbc driver handles a full zone is to always report the wp as zone start + zone len, regardless of what the drive reported. null_blk also follows this convention. Do the same for NVMe, so that a BLKREPORTZONE ioctl reports the write pointer for a full zone in a consistent way, regardless of the interface of the underlying zoned block device. blkzone report before patch: start: 0x000040000, len 0x040000, cap 0x03e000, wptr 0xfffffffffffbfff8 reset:0 non-seq:0, zcond:14(fu) [type: 2(SEQ_WRITE_REQUIRED)] blkzone report after patch: start: 0x000040000, len 0x040000, cap 0x03e000, wptr 0x040000 reset:0 non-seq:0, zcond:14(fu) [type: 2(SEQ_WRITE_REQUIRED)] Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com> Reviewed-by: Keith Busch <kbusch@kernel.org> Reviewed-by: Damien Le Moal <damien.lemoal@opensource.wdc.com> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Signed-off-by: Christoph Hellwig <hch@lst.de> |
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| .. | ||
| core.c | ||
| fabrics.c | ||
| fabrics.h | ||
| fault_inject.c | ||
| fc.c | ||
| fc.h | ||
| hwmon.c | ||
| ioctl.c | ||
| Kconfig | ||
| Makefile | ||
| multipath.c | ||
| nvme.h | ||
| pci.c | ||
| rdma.c | ||
| tcp.c | ||
| trace.c | ||
| trace.h | ||
| zns.c | ||