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| author | Keith Busch <kbusch@kernel.org> | 2020-09-24 13:53:28 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2020-10-13 15:05:05 -0600 |
| commit | 3b481d91356e5693d8358d4ef9c383bdb92c8da0 (patch) | |
| tree | afedde5da48885555103d2324c064777e024011a /Documentation/block | |
| parent | 47be77c2f80412f903134a57caea25fa3fc5f578 (diff) | |
| download | linux-3b481d91356e5693d8358d4ef9c383bdb92c8da0.tar.bz2 | |
block: add zone specific block statuses
A zoned device with limited resources to open or activate zones may
return an error when the host exceeds those limits. The same command may
be successful if retried later, but the host needs to wait for specific
zone states before it should expect a retry to succeed. Have the block
layer provide an appropriate status for these conditions so applications
can distinuguish this error for special handling.
Cc: linux-api@vger.kernel.org
Cc: Niklas Cassel <niklas.cassel@wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'Documentation/block')
| -rw-r--r-- | Documentation/block/queue-sysfs.rst | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/Documentation/block/queue-sysfs.rst b/Documentation/block/queue-sysfs.rst index f261a5c84170..2638d3446b79 100644 --- a/Documentation/block/queue-sysfs.rst +++ b/Documentation/block/queue-sysfs.rst @@ -124,6 +124,10 @@ For zoned block devices (zoned attribute indicating "host-managed" or EXPLICIT OPEN, IMPLICIT OPEN or CLOSED, is limited by this value. If this value is 0, there is no limit. +If the host attempts to exceed this limit, the driver should report this error +with BLK_STS_ZONE_ACTIVE_RESOURCE, which user space may see as the EOVERFLOW +errno. + max_open_zones (RO) ------------------- For zoned block devices (zoned attribute indicating "host-managed" or @@ -131,6 +135,10 @@ For zoned block devices (zoned attribute indicating "host-managed" or EXPLICIT OPEN or IMPLICIT OPEN, is limited by this value. If this value is 0, there is no limit. +If the host attempts to exceed this limit, the driver should report this error +with BLK_STS_ZONE_OPEN_RESOURCE, which user space may see as the ETOOMANYREFS +errno. + max_sectors_kb (RW) ------------------- This is the maximum number of kilobytes that the block layer will allow |