File diags-diag_nvme-call_home-command-fails-on-nvmf-driv.patch of Package ppc64-diag.32143

From db0c6d7974d7f8909878384d77ec02457759d6df Mon Sep 17 00:00:00 2001
From: Nilay Shroff <nilay@linux.ibm.com>
Date: Tue, 16 Jan 2024 13:55:03 +0530
Subject: [PATCH] diags/diag_nvme: call_home command fails on nvmf drive

The diag_nvme command needs to retrieve the VPD log page from NVMe for
filling in the product data while generating the call-home event.
However, call-home feature is supported for directly attached NVMe
module. In the current diag_nvme implementation, if user doesn't
provide NVMe device name for diagnostics then it(diag_nvme)  loops
through each NVMe moudle (directly connected to the system/LPAR as
well as discovered over fabrics) and attempt retrieving the SMART log
page as well as VPD page.  Unfortunately, diag_nvme fails to retrieve
the VPD page for NVMe connected over fabrics and that causes the
diag_nvme to print "not-so-nice" failure messages on console.

Henec fixed the diag_nvme code so that for call-home event reporting,
it skips the NVMe which is connected over fabrics and prints a
"nice-message" informing the user that it's skipping diagnosting for
NVMe module connected over fabrics.  In a nutshell, with this fix now
diag_nvme would only diagnose the NVMe module which is directtly
attached (over PCIe) to the system.

Signed-off-by: Nilay Shroff <nilay@linux.ibm.com>
---
 diags/diag_nvme.c | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/diags/diag_nvme.c b/diags/diag_nvme.c
index c1c0a20ddf14..e86786ccdccd 100644
--- a/diags/diag_nvme.c
+++ b/diags/diag_nvme.c
@@ -375,9 +375,40 @@ static int diagnose_nvme(char *device_name, struct notify *notify, char *file_pa
 	char endurance_s[sizeof(vpd.endurance) + 1], capacity_s[sizeof(vpd.capacity)+1];
         uint64_t event_id;
 	uint8_t severity;
+	FILE *fp;
+	char tr_file_path[PATH_MAX];
 	uint32_t raw_data_len = 0;
 	unsigned char *raw_data = NULL;
 
+	/*
+	 * Skip diag test if NVMe is connected over fabric
+	 */
+	snprintf(tr_file_path, sizeof(tr_file_path),
+			NVME_SYS_PATH"/%s/%s", device_name, "transport");
+	fp = fopen(tr_file_path, "r");
+	if (fp) {
+		char buf[12];
+		int n = fread(buf, 1, sizeof(buf), fp);
+
+		if (n) {
+			/*
+			 * If NVMe transport is anything but pcie then skip the diag test
+			 */
+			if (strncmp(buf, "pcie", 4) != 0) {
+				fprintf(stdout, "Skipping diagnostics for nvmf : %s\n",
+						device_name);
+				fclose(fp);
+				return 0;
+			}
+		}
+		fclose(fp);
+	} else {
+		fprintf(stderr, "Skipping diagnostics for %s:\n"
+				"Unable to find the nvme transport type\n",
+				device_name);
+		return -1;
+	}
+
 	tmp_rc = regex_controller(controller_name, device_name);
 	if (tmp_rc != 0)
 		return -1;
-- 
2.43.2