Commit d7ac8dca938c ("nvme: quiet user passthrough command errors")
disabled error logging for user passthrough commands. This commit
adds the ability to opt-in to passthrough admin error logging. IO
commands initiated as passthrough will always be logged.
The logging output for passthrough commands (Admin and IO) has been
changed to include CDWXX fields.
nvme0n1: Read(0x2), LBA Out of Range (sct 0x0 / sc 0x80) DNR cdw10=0x0 cdw11=0x1
cdw12=0x70000 cdw13=0x0 cdw14=0x0 cdw15=0x0
Add a helper function nvme_log_err_passthru() which allows us to log
error for passthru commands by decoding cdw10-cdw15 values of nvme
command.
Add a new sysfs attr passthru_err_log_enabled that allows user to conditionally
enable passthru command logging, by default it is disabled.
To enable passthrough admin error logging:
echo 1 > /sys/class/nvme/nvme0/passthru_err_log_enabled
To disable passthrough admin error logging:
echo 0 > /sys/class/nvme/nvme0/passthru_err_log_enabled
Signed-off-by: Alan Adamson <alan.adamson at oracle.com>
[kch] fix sevaral nits and trim down code, details in cover-letter.
Signed-off-by: Chaitanya Kulkarni <kch at nvidia.com>
---
drivers/nvme/host/core.c | 43 ++++++++++++++++++++++++++++++++++-----
drivers/nvme/host/nvme.h | 1 +
drivers/nvme/host/sysfs.c | 29 ++++++++++++++++++++++++++
3 files changed, 68 insertions(+), 5 deletions(-)
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index f3a01b79148c..1bf933c886fd 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -337,6 +337,30 @@ static void nvme_log_error(struct request *req)
nr->status & NVME_SC_DNR ? "DNR " : "");
}
+static void nvme_log_err_passthru(struct request *req)
+{
+ struct nvme_ns *ns = req->q->queuedata;
+ struct nvme_request *nr = nvme_req(req);
+
+ pr_err_ratelimited("%s: %s(0x%x), %s (sct 0x%x / sc 0x%x) %s%s"
+ "cdw10=0x%x cdw11=0x%x cdw12=0x%x cdw13=0x%x cdw14=0x%x cdw15=0x%x\n",
+ ns ? ns->disk->disk_name : dev_name(nr->ctrl->device),
+ ns ? nvme_get_opcode_str(nr->cmd->common.opcode) :
+ 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 */
+ nr->status & NVME_SC_MORE ? "MORE " : "",
+ nr->status & NVME_SC_DNR ? "DNR " : "",
+ nr->cmd->common.cdw10,
+ nr->cmd->common.cdw11,
+ nr->cmd->common.cdw12,
+ nr->cmd->common.cdw13,
+ nr->cmd->common.cdw14,
+ nr->cmd->common.cdw14);
+}
+
enum nvme_disposition {
COMPLETE,
RETRY,
@@ -381,8 +405,12 @@ static inline void nvme_end_req(struct request *req)
{
blk_status_t status = nvme_error_status(nvme_req(req)->status);
- if (unlikely(nvme_req(req)->status && !(req->rq_flags & RQF_QUIET)))
- nvme_log_error(req);
+ if (unlikely(nvme_req(req)->status && !(req->rq_flags & RQF_QUIET))) {
+ if (blk_rq_is_passthrough(req))
+ nvme_log_err_passthru(req);
+ else
+ nvme_log_error(req);
+ }
nvme_end_req_zoned(req);
nvme_trace_bio_complete(req);
if (req->cmd_flags & REQ_NVME_MPATH)
@@ -675,10 +703,15 @@ static inline void nvme_clear_nvme_request(struct request *req)
/* initialize a passthrough request */
void nvme_init_request(struct request *req, struct nvme_command *cmd)
{
+ struct nvme_request *nr = nvme_req(req);
+
if (req->q->queuedata)
req->timeout = NVME_IO_TIMEOUT;
- else /* no queuedata implies admin queue */
+ else { /* no queuedata implies admin queue */
req->timeout = NVME_ADMIN_TIMEOUT;
+ if (!nr->ctrl->passthru_err_log_enabled)
+ req->rq_flags |= RQF_QUIET;
+ }
/* passthru commands should let the driver set the SGL flags */
cmd->common.flags &= ~NVME_CMD_SGL_ALL;
@@ -687,8 +720,7 @@ void nvme_init_request(struct request *req, struct nvme_command *cmd)
if (req->mq_hctx->type == HCTX_TYPE_POLL)
req->cmd_flags |= REQ_POLLED;
nvme_clear_nvme_request(req);
- req->rq_flags |= RQF_QUIET;
- memcpy(nvme_req(req)->cmd, cmd, sizeof(*cmd));
+ memcpy(nr->cmd, cmd, sizeof(*cmd));
}
EXPORT_SYMBOL_GPL(nvme_init_request);
@@ -4415,6 +4447,7 @@ int nvme_init_ctrl(struct nvme_ctrl *ctrl, struct device *dev,
int ret;
ctrl->state = NVME_CTRL_NEW;
+ ctrl->passthru_err_log_enabled = false;
clear_bit(NVME_CTRL_FAILFAST_EXPIRED, &ctrl->flags);
spin_lock_init(&ctrl->lock);
mutex_init(&ctrl->scan_lock);
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index f35647c470af..7da6285fc30a 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -256,6 +256,7 @@ enum nvme_ctrl_flags {
struct nvme_ctrl {
bool comp_seen;
bool identified;
+ bool passthru_err_log_enabled;
enum nvme_ctrl_state state;
spinlock_t lock;
struct mutex scan_lock;
diff --git a/drivers/nvme/host/sysfs.c b/drivers/nvme/host/sysfs.c
index 212e1b05d298..fbca06a4e4ce 100644
--- a/drivers/nvme/host/sysfs.c
+++ b/drivers/nvme/host/sysfs.c
@@ -35,6 +35,34 @@ static ssize_t nvme_sysfs_rescan(struct device *dev,
}
static DEVICE_ATTR(rescan_controller, S_IWUSR, NULL, nvme_sysfs_rescan);
+static ssize_t nvme_passthru_err_log_enabled_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct nvme_ctrl *ctrl = dev_get_drvdata(dev);
+
+ return sysfs_emit(buf, ctrl->passthru_err_log_enabled ? "on" : "off");
+}
+
+static ssize_t nvme_passthru_err_log_enabled_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ struct nvme_ctrl *ctrl = dev_get_drvdata(dev);
+ int err;
+ bool passthru_err_log_enabled;
+
+ err = kstrtobool(buf, &passthru_err_log_enabled);
+ if (err)
+ return -EINVAL;
+
+ ctrl->passthru_err_log_enabled = passthru_err_log_enabled;
+
+ return count;
+}
+
+static DEVICE_ATTR(passthru_err_log_enabled, S_IRUGO | S_IWUSR,
+ nvme_passthru_err_log_enabled_show,
+ nvme_passthru_err_log_enabled_store);
+
static inline struct nvme_ns_head *dev_to_ns_head(struct device *dev)
{
struct gendisk *disk = dev_to_disk(dev);
@@ -554,6 +582,7 @@ static struct attribute *nvme_dev_attrs[] = {
&dev_attr_dhchap_secret.attr,
&dev_attr_dhchap_ctrl_secret.attr,
#endif
+ &dev_attr_passthru_err_log_enabled.attr,
NULL
};
--
2.39.3