On 4/26/22 12:12, Nitesh Shetty wrote:
Add device limits as sysfs entries,
- copy_offload (RW)
- copy_max_bytes (RW)
- copy_max_hw_bytes (RO)
- copy_max_range_bytes (RW)
- copy_max_range_hw_bytes (RO)
- copy_max_nr_ranges (RW)
- copy_max_nr_ranges_hw (RO)
Above limits help to split the copy payload in block layer.
copy_offload, used for setting copy offload(1) or emulation(0).
copy_max_bytes: maximum total length of copy in single payload.
copy_max_range_bytes: maximum length in a single entry.
copy_max_nr_ranges: maximum number of entries in a payload.
copy_max_*_hw_*: Reflects the device supported maximum limits.
Signed-off-by: Nitesh Shetty <nj.shetty@xxxxxxxxxxx>
Signed-off-by: Kanchan Joshi <joshi.k@xxxxxxxxxxx>
Signed-off-by: Arnav Dawn <arnav.dawn@xxxxxxxxxxx>
---
Documentation/ABI/stable/sysfs-block | 83 ++++++++++++++++
block/blk-settings.c | 59 ++++++++++++
block/blk-sysfs.c | 138 +++++++++++++++++++++++++++
include/linux/blkdev.h | 13 +++
4 files changed, 293 insertions(+)
Reviewed-by: Hannes Reinecke <hare@xxxxxxx>
Cheers,
Hannes
--
Dr. Hannes Reinecke Kernel Storage Architect
hare@xxxxxxx +49 911 74053 688
SUSE Software Solutions Germany GmbH, Maxfeldstr. 5, 90409 Nürnberg
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