[PATCH 2/3] nvme: fix status magic numbers
Weiwen Hu
huweiwen at linux.alibaba.com
Wed May 29 05:22:59 PDT 2024
Replaced some magic numbers about SC and SCT with enum and macro.
Signed-off-by: Weiwen Hu <huweiwen at linux.alibaba.com>
---
drivers/nvme/host/constants.c | 2 +-
drivers/nvme/host/core.c | 18 +++++++++---------
drivers/nvme/host/multipath.c | 2 +-
drivers/nvme/host/nvme.h | 4 ++--
drivers/nvme/host/pr.c | 2 +-
include/linux/nvme.h | 14 ++++++++++++--
6 files changed, 26 insertions(+), 16 deletions(-)
diff --git a/drivers/nvme/host/constants.c b/drivers/nvme/host/constants.c
index 6f2ebb5fcdb0..2b9e6cfaf2a8 100644
--- a/drivers/nvme/host/constants.c
+++ b/drivers/nvme/host/constants.c
@@ -173,7 +173,7 @@ static const char * const nvme_statuses[] = {
const char *nvme_get_error_status_str(u16 status)
{
- status &= 0x7ff;
+ status &= NVME_SCT_SC_MASK;
if (status < ARRAY_SIZE(nvme_statuses) && nvme_statuses[status])
return nvme_statuses[status];
return "Unknown";
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 954f850f113a..7e74c57f1acd 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -261,7 +261,7 @@ void nvme_delete_ctrl_sync(struct nvme_ctrl *ctrl)
static blk_status_t nvme_error_status(u16 status)
{
- switch (status & 0x7ff) {
+ switch (status & NVME_SCT_SC_MASK) {
case NVME_SC_SUCCESS:
return BLK_STS_OK;
case NVME_SC_CAP_EXCEEDED:
@@ -329,8 +329,8 @@ static void nvme_log_error(struct request *req)
nvme_sect_to_lba(ns->head, blk_rq_pos(req)),
blk_rq_bytes(req) >> ns->head->lba_shift,
nvme_get_error_status_str(nr->status),
- nr->status >> 8 & 7, /* Status Code Type */
- nr->status & 0xff, /* Status Code */
+ NVME_SCT(nr->status), /* Status Code Type */
+ nr->status & NVME_SC_MASK, /* Status Code */
nr->status & NVME_SC_MORE ? "MORE " : "",
nr->status & NVME_SC_DNR ? "DNR " : "");
return;
@@ -341,8 +341,8 @@ static void nvme_log_error(struct request *req)
nvme_get_admin_opcode_str(nr->cmd->common.opcode),
nr->cmd->common.opcode,
nvme_get_error_status_str(nr->status),
- nr->status >> 8 & 7, /* Status Code Type */
- nr->status & 0xff, /* Status Code */
+ NVME_SCT(nr->status), /* Status Code Type */
+ nr->status & NVME_SC_MASK, /* Status Code */
nr->status & NVME_SC_MORE ? "MORE " : "",
nr->status & NVME_SC_DNR ? "DNR " : "");
}
@@ -359,8 +359,8 @@ static void nvme_log_err_passthru(struct request *req)
nvme_get_admin_opcode_str(nr->cmd->common.opcode),
nr->cmd->common.opcode,
nvme_get_error_status_str(nr->status),
- nr->status >> 8 & 7, /* Status Code Type */
- nr->status & 0xff, /* Status Code */
+ NVME_SCT(nr->status), /* Status Code Type */
+ nr->status & NVME_SC_MASK, /* Status Code */
nr->status & NVME_SC_MORE ? "MORE " : "",
nr->status & NVME_SC_DNR ? "DNR " : "",
nr->cmd->common.cdw10,
@@ -388,7 +388,7 @@ static inline enum nvme_disposition nvme_decide_disposition(struct request *req)
nvme_req(req)->retries >= nvme_max_retries)
return COMPLETE;
- if ((nvme_req(req)->status & 0x7ff) == NVME_SC_AUTH_REQUIRED)
+ if ((nvme_req(req)->status & NVME_SCT_SC_MASK) == NVME_SC_AUTH_REQUIRED)
return AUTHENTICATE;
if (req->cmd_flags & REQ_NVME_MPATH) {
@@ -1218,7 +1218,7 @@ EXPORT_SYMBOL_NS_GPL(nvme_passthru_end, NVME_TARGET_PASSTHRU);
/*
* Recommended frequency for KATO commands per NVMe 1.4 section 7.12.1:
- *
+ *
* The host should send Keep Alive commands at half of the Keep Alive Timeout
* accounting for transport roundtrip times [..].
*/
diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c
index d16e976ae1a4..b4b12756ac85 100644
--- a/drivers/nvme/host/multipath.c
+++ b/drivers/nvme/host/multipath.c
@@ -83,7 +83,7 @@ void nvme_mpath_start_freeze(struct nvme_subsystem *subsys)
void nvme_failover_req(struct request *req)
{
struct nvme_ns *ns = req->q->queuedata;
- u16 status = nvme_req(req)->status & 0x7ff;
+ u16 status = nvme_req(req)->status & NVME_SCT_SC_MASK;
unsigned long flags;
struct bio *bio;
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index cacc56f4bbf4..36c5caf8c512 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -690,7 +690,7 @@ static inline u32 nvme_bytes_to_numd(size_t len)
static inline bool nvme_is_ana_error(u16 status)
{
- switch (status & 0x7ff) {
+ switch (status & NVME_SCT_SC_MASK) {
case NVME_SC_ANA_TRANSITION:
case NVME_SC_ANA_INACCESSIBLE:
case NVME_SC_ANA_PERSISTENT_LOSS:
@@ -703,7 +703,7 @@ static inline bool nvme_is_ana_error(u16 status)
static inline bool nvme_is_path_error(u16 status)
{
/* check for a status code type of 'path related status' */
- return (status & 0x700) == 0x300;
+ return (status & NVME_SCT_MASK) == NVME_SCT_PATH;
}
/*
diff --git a/drivers/nvme/host/pr.c b/drivers/nvme/host/pr.c
index 25e23cdba151..ef4b254b0ec4 100644
--- a/drivers/nvme/host/pr.c
+++ b/drivers/nvme/host/pr.c
@@ -77,7 +77,7 @@ static int nvme_status_to_pr_err(int nvme_status)
if (nvme_is_path_error(nvme_status))
return PR_STS_PATH_FAILED;
- switch (nvme_status & 0x7ff) {
+ switch (nvme_status & NVME_SCT_SC_MASK) {
case NVME_SC_SUCCESS:
return PR_STS_SUCCESS;
case NVME_SC_RESERVATION_CONFLICT:
diff --git a/include/linux/nvme.h b/include/linux/nvme.h
index 425573202295..c8d7fdd095a1 100644
--- a/include/linux/nvme.h
+++ b/include/linux/nvme.h
@@ -1846,6 +1846,7 @@ enum {
/*
* Generic Command Status:
*/
+ NVME_SCT_GENERIC = 0x0,
NVME_SC_SUCCESS = 0x0,
NVME_SC_INVALID_OPCODE = 0x1,
NVME_SC_INVALID_FIELD = 0x2,
@@ -1893,6 +1894,7 @@ enum {
/*
* Command Specific Status:
*/
+ NVME_SCT_COMMAND_SPECIFIC = 0x100,
NVME_SC_CQ_INVALID = 0x100,
NVME_SC_QID_INVALID = 0x101,
NVME_SC_QUEUE_SIZE = 0x102,
@@ -1966,6 +1968,7 @@ enum {
/*
* Media and Data Integrity Errors:
*/
+ NVME_SCT_MEDIA_ERROR = 0x200,
NVME_SC_WRITE_FAULT = 0x280,
NVME_SC_READ_ERROR = 0x281,
NVME_SC_GUARD_CHECK = 0x282,
@@ -1978,6 +1981,7 @@ enum {
/*
* Path-related Errors:
*/
+ NVME_SCT_PATH = 0x300,
NVME_SC_INTERNAL_PATH_ERROR = 0x300,
NVME_SC_ANA_PERSISTENT_LOSS = 0x301,
NVME_SC_ANA_INACCESSIBLE = 0x302,
@@ -1986,11 +1990,17 @@ enum {
NVME_SC_HOST_PATH_ERROR = 0x370,
NVME_SC_HOST_ABORTED_CMD = 0x371,
- NVME_SC_CRD = 0x1800,
+ NVME_SC_MASK = 0x00ff, /* Status Code */
+ NVME_SCT_MASK = 0x0700, /* Status Code Type */
+ NVME_SCT_SC_MASK = NVME_SCT_MASK | NVME_SC_MASK,
+
+ NVME_SC_CRD = 0x1800, /* Command Retry Delayed */
NVME_SC_MORE = 0x2000,
- NVME_SC_DNR = 0x4000,
+ NVME_SC_DNR = 0x4000, /* Do Not Retry */
};
+#define NVME_SCT(status) ((status) >> 8 & 7)
+
struct nvme_completion {
/*
* Used by Admin and Fabrics commands to return data:
--
2.45.1
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