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hw/block/nvme: refactor the logic for zone write checks 

Refactor the zone write check logic such that the most "meaningful"
error is returned first. That is, first, if the zone is not writable,
return an appropriate status code for that. Then, make sure we are
actually writing at the write pointer and finally check that we do not
cross the zone write boundary. This aligns with the "priority" of status
codes for zone read checks.

Also add a couple of additional descriptive trace events and remove an
always true assert.

Cc: Dmitry Fomichev <dmitry.fomichev@wdc.com>
Tested-by: Niklas Cassel <niklas.cassel@wdc.com>
Tested-by: Dmitry Fomichev <dmitry.fomichev@wdc.com>
Reviewed-by: Dmitry Fomichev <dmitry.fomichev@wdc.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
This commit is contained in:
Klaus Jensen 2021-01-19 14:21:50 +01:00
parent a679dc3efd
commit 3e22762edc
2 changed files with 28 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

49
hw/block/nvme.c
View File

@ -1161,56 +1161,53 @@ static inline NvmeZone *nvme_get_zone_by_slba(NvmeNamespace *ns, uint64_t slba)
static uint16_t nvme_check_zone_state_for_write(NvmeZone *zone)
{
uint16_t status;
uint64_t zslba = zone->d.zslba;
switch (nvme_get_zone_state(zone)) {
case NVME_ZONE_STATE_EMPTY:
case NVME_ZONE_STATE_IMPLICITLY_OPEN:
case NVME_ZONE_STATE_EXPLICITLY_OPEN:
case NVME_ZONE_STATE_CLOSED:
status = NVME_SUCCESS;
break;
return NVME_SUCCESS;
case NVME_ZONE_STATE_FULL:
status = NVME_ZONE_FULL;
break;
trace_pci_nvme_err_zone_is_full(zslba);
return NVME_ZONE_FULL;
case NVME_ZONE_STATE_OFFLINE:
status = NVME_ZONE_OFFLINE;
break;
trace_pci_nvme_err_zone_is_offline(zslba);
return NVME_ZONE_OFFLINE;
case NVME_ZONE_STATE_READ_ONLY:
status = NVME_ZONE_READ_ONLY;
break;
trace_pci_nvme_err_zone_is_read_only(zslba);
return NVME_ZONE_READ_ONLY;
default:
assert(false);
}
return status;
return NVME_INTERNAL_DEV_ERROR;
}
static uint16_t nvme_check_zone_write(NvmeCtrl *n, NvmeNamespace *ns,
NvmeZone *zone, uint64_t slba,
uint32_t nlb)
{
uint64_t zcap = nvme_zone_wr_boundary(zone);
uint16_t status;
if (unlikely((slba + nlb) > nvme_zone_wr_boundary(zone))) {
status = NVME_ZONE_BOUNDARY_ERROR;
} else {
status = nvme_check_zone_state_for_write(zone);
}
status = nvme_check_zone_state_for_write(zone);
if (status) {
trace_pci_nvme_err_zone_write_not_ok(slba, nlb, status);
} else {
assert(nvme_wp_is_valid(zone));
if (unlikely(slba != zone->w_ptr)) {
trace_pci_nvme_err_write_not_at_wp(slba, zone->d.zslba,
zone->w_ptr);
status = NVME_ZONE_INVALID_WRITE;
}
return status;
}
return status;
if (unlikely(slba != zone->w_ptr)) {
trace_pci_nvme_err_write_not_at_wp(slba, zone->d.zslba, zone->w_ptr);
return NVME_ZONE_INVALID_WRITE;
}
if (unlikely((slba + nlb) > zcap)) {
trace_pci_nvme_err_zone_boundary(slba, nlb, zcap);
return NVME_ZONE_BOUNDARY_ERROR;
}
return NVME_SUCCESS;
}
static uint16_t nvme_check_zone_state_for_read(NvmeZone *zone)

5
hw/block/trace-events
View File

@ -129,6 +129,11 @@ pci_nvme_err_unaligned_zone_cmd(uint8_t action, uint64_t slba, uint64_t zslba) "
pci_nvme_err_invalid_zone_state_transition(uint8_t action, uint64_t slba, uint8_t attrs) "action=0x%"PRIx8", slba=%"PRIu64", attrs=0x%"PRIx32""
pci_nvme_err_write_not_at_wp(uint64_t slba, uint64_t zone, uint64_t wp) "writing at slba=%"PRIu64", zone=%"PRIu64", but wp=%"PRIu64""
pci_nvme_err_append_not_at_start(uint64_t slba, uint64_t zone) "appending at slba=%"PRIu64", but zone=%"PRIu64""
pci_nvme_err_zone_is_full(uint64_t zslba) "zslba 0x%"PRIx64""
pci_nvme_err_zone_is_read_only(uint64_t zslba) "zslba 0x%"PRIx64""
pci_nvme_err_zone_is_offline(uint64_t zslba) "zslba 0x%"PRIx64""
pci_nvme_err_zone_boundary(uint64_t slba, uint32_t nlb, uint64_t zcap) "lba 0x%"PRIx64" nlb %"PRIu32" zcap 0x%"PRIx64""
pci_nvme_err_zone_invalid_write(uint64_t slba, uint64_t wp) "lba 0x%"PRIx64" wp 0x%"PRIx64""
pci_nvme_err_zone_write_not_ok(uint64_t slba, uint32_t nlb, uint16_t status) "slba=%"PRIu64", nlb=%"PRIu32", status=0x%"PRIx16""
pci_nvme_err_zone_read_not_ok(uint64_t slba, uint32_t nlb, uint16_t status) "slba=%"PRIu64", nlb=%"PRIu32", status=0x%"PRIx16""
pci_nvme_err_append_too_large(uint64_t slba, uint32_t nlb, uint8_t zasl) "slba=%"PRIu64", nlb=%"PRIu32", zasl=%"PRIu8""