From: Damien Le Moal damien.lemoal@opensource.wdc.com
[ Upstream commit 566d3c57eb526f32951af15866086e236ce1fc8a ]
When a write command to a sequential write required or sequential write preferred zone result in the zone write pointer reaching the end of the zone, the zone condition must be set to full AND the number of implicitly or explicitly open zones updated to have a correct accounting for zone resources. However, the function zbc_inc_wp() only sets the zone condition to full without updating the open zone counters, resulting in a zone state machine breakage.
Introduce the helper function zbc_set_zone_full() and use it in zbc_inc_wp() to correctly transition zones to the full condition.
Link: https://lore.kernel.org/r/20220608011302.92061-1-damien.lemoal@opensource.wd... Fixes: f0d1cf9378bd ("scsi: scsi_debug: Add ZBC zone commands") Reviewed-by: Niklas Cassel niklas.cassel@wdc.com Acked-by: Douglas Gilbert dgilbert@interlog.com Signed-off-by: Damien Le Moal damien.lemoal@opensource.wdc.com Signed-off-by: Martin K. Petersen martin.petersen@oracle.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/scsi/scsi_debug.c | 22 ++++++++++++++++++++-- 1 file changed, 20 insertions(+), 2 deletions(-)
diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c index cfeadd5f61f1..747e1cbb7ec9 100644 --- a/drivers/scsi/scsi_debug.c +++ b/drivers/scsi/scsi_debug.c @@ -2747,6 +2747,24 @@ static void zbc_open_zone(struct sdebug_dev_info *devip, } }
+static inline void zbc_set_zone_full(struct sdebug_dev_info *devip, + struct sdeb_zone_state *zsp) +{ + switch (zsp->z_cond) { + case ZC2_IMPLICIT_OPEN: + devip->nr_imp_open--; + break; + case ZC3_EXPLICIT_OPEN: + devip->nr_exp_open--; + break; + default: + WARN_ONCE(true, "Invalid zone %llu condition %x\n", + zsp->z_start, zsp->z_cond); + break; + } + zsp->z_cond = ZC5_FULL; +} + static void zbc_inc_wp(struct sdebug_dev_info *devip, unsigned long long lba, unsigned int num) { @@ -2759,7 +2777,7 @@ static void zbc_inc_wp(struct sdebug_dev_info *devip, if (zsp->z_type == ZBC_ZONE_TYPE_SWR) { zsp->z_wp += num; if (zsp->z_wp >= zend) - zsp->z_cond = ZC5_FULL; + zbc_set_zone_full(devip, zsp); return; }
@@ -2778,7 +2796,7 @@ static void zbc_inc_wp(struct sdebug_dev_info *devip, n = num; } if (zsp->z_wp >= zend) - zsp->z_cond = ZC5_FULL; + zbc_set_zone_full(devip, zsp);
num -= n; lba += n;