original_kernel/drivers/block
Damien Le Moal b164316808 null_blk: Do not allow runt zone with zone capacity smaller then zone size
A zoned device with a smaller last zone together with a zone capacity
smaller than the zone size does make any sense as that does not
correspond to any possible setup for a real device:
1) For ZNS and zoned UFS devices, all zones are always the same size.
2) For SMR HDDs, all zones always have the same capacity.
In other words, if we have a smaller last runt zone, then this zone
capacity should always be equal to the zone size.

Add a check in null_init_zoned_dev() to prevent a configuration to have
both a smaller zone size and a zone capacity smaller than the zone size.

Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Niklas Cassel <cassel@kernel.org>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20240530054035.491497-2-dlemoal@kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2024-05-30 15:03:52 -06:00
..
aoe
drbd
mtip32xx
null_blk null_blk: Do not allow runt zone with zone capacity smaller then zone size 2024-05-30 15:03:52 -06:00
rnbd
xen-blkback
zram
Kconfig
Makefile
amiflop.c
ataflop.c
brd.c
floppy.c
loop.c
n64cart.c
nbd.c
pktcdvd.c
ps3disk.c
ps3vram.c
rbd.c
rbd_types.h
sunvdc.c
swim.c
swim3.c
swim_asm.S
ublk_drv.c
virtio_blk.c
xen-blkfront.c
z2ram.c