device-mapper-multipath/0057-multipathd-wrap-setting-and-unsetting-prflag.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Benjamin Marzinski <bmarzins@redhat.com>
Date: Fri, 25 Jul 2025 23:58:46 -0400
Subject: [PATCH] multipathd: wrap setting and unsetting prflag

When prflag is unset, prhold and sa_flags should also be unset. A future
patch will add another variable to be set when prflag is set. Wrap all
these actions in set_pr() and unset_pr().

Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
Reviewed-by: Martin Wilck <mwilck@suse.com>
---
 multipathd/cli_handlers.c | 10 ++++------
 multipathd/main.c         | 34 ++++++++++++++++++++--------------
 multipathd/main.h         |  2 ++
 3 files changed, 26 insertions(+), 20 deletions(-)

diff --git a/multipathd/cli_handlers.c b/multipathd/cli_handlers.c
index 94d0b63f..ee2764b9 100644
--- a/multipathd/cli_handlers.c
+++ b/multipathd/cli_handlers.c
@@ -1280,7 +1280,7 @@ cli_setprstatus(void * v, struct strbuf *reply, void * data)
 		return -ENODEV;
 
 	if (mpp->prflag != PR_SET) {
-		mpp->prflag = PR_SET;
+		set_pr(mpp);
 		condlog(2, "%s: prflag set", param);
 	}
 
@@ -1301,12 +1301,10 @@ cli_unsetprstatus(void * v, struct strbuf *reply, void * data)
 		return -ENODEV;
 
 	if (mpp->prflag != PR_UNSET) {
-		mpp->prflag = PR_UNSET;
 		condlog(2, "%s: prflag unset", param);
-	}
-	if (mpp->prhold != PR_UNSET) {
-		mpp->prhold = PR_UNSET;
-		condlog(2, "%s: prhold unset (by clearing prflag)", param);
+		if (mpp->prhold != PR_UNSET)
+			condlog(2, "%s: prhold unset (by clearing prflag)", param);
+		unset_pr(mpp);
 	}
 
 	return 0;
diff --git a/multipathd/main.c b/multipathd/main.c
index bc42f2fa..e29ab2b8 100644
--- a/multipathd/main.c
+++ b/multipathd/main.c
@@ -3944,10 +3944,6 @@ static void check_prhold(struct multipath *mpp, struct path *pp)
 	struct prin_resp resp = {{{.prgeneration = 0}}};
 	int status;
 
-	if (mpp->prflag == PR_UNSET) {
-		mpp->prhold = PR_UNSET;
-		return;
-	}
 	if (mpp->prflag != PR_SET || mpp->prhold != PR_UNKNOWN)
 		return;
 
@@ -3966,6 +3962,18 @@ static void check_prhold(struct multipath *mpp, struct path *pp)
 		mpp->prhold = PR_SET;
 }
 
+void set_pr(struct multipath *mpp)
+{
+	mpp->prflag = PR_SET;
+}
+
+void unset_pr(struct multipath *mpp)
+{
+	mpp->prflag = PR_UNSET;
+	mpp->prhold = PR_UNSET;
+	mpp->sa_flags = 0;
+}
+
 static int update_map_pr(struct multipath *mpp, struct path *pp)
 {
 	struct prin_resp resp;
@@ -3979,7 +3987,7 @@ static int update_map_pr(struct multipath *mpp, struct path *pp)
 
 	if (!get_be64(mpp->reservation_key)) {
 		/* Nothing to do. Assuming pr mgmt feature is disabled*/
-		mpp->prflag = PR_UNSET;
+		unset_pr(mpp);
 		condlog(was_set ? 2 : 4,
 			"%s: reservation_key not set in multipath.conf",
 			mpp->alias);
@@ -3991,12 +3999,11 @@ static int update_map_pr(struct multipath *mpp, struct path *pp)
 	ret = prin_do_scsi_ioctl(pp->dev, MPATH_PRIN_RKEY_SA, &resp, 0);
 	if (ret != MPATH_PR_SUCCESS) {
 		if (ret == MPATH_PR_ILLEGAL_REQ)
-			mpp->prflag = PR_UNSET;
+			unset_pr(mpp);
 		condlog(0, "%s : pr in read keys service action failed Error=%d",
 			mpp->alias, ret);
 		return ret;
 	}
-	mpp->prflag = PR_UNSET;
 
 	condlog(4, "%s: Multipath reservation_key: 0x%" PRIx64 " ", mpp->alias,
 		get_be64(mpp->reservation_key));
@@ -4017,11 +4024,13 @@ static int update_map_pr(struct multipath *mpp, struct path *pp)
 	}
 
 	if (isFound) {
-		mpp->prflag = PR_SET;
+		set_pr(mpp);
 		condlog(was_set ? 3 : 2, "%s: key found. prflag set.", mpp->alias);
-	} else
+	} else {
+		unset_pr(mpp);
 		condlog(was_set ? 1 : 3, "%s: key not found. prflag unset.",
 			mpp->alias);
+	}
 
 	return MPATH_PR_SUCCESS;
 }
@@ -4033,15 +4042,12 @@ static void mpath_pr_event_handle(struct path *pp)
 	struct prout_param_descriptor param;
 
 	if (pp->bus != SYSFS_BUS_SCSI) {
-		mpp->prflag = PR_UNSET;
+		unset_pr(mpp);
 		return;
 	}
 
-	if (update_map_pr(mpp, pp) != MPATH_PR_SUCCESS) {
-		if (mpp->prflag == PR_UNSET)
-			mpp->prhold = PR_UNSET;
+	if (update_map_pr(mpp, pp) != MPATH_PR_SUCCESS)
 		return;
-	}
 
 	check_prhold(mpp, pp);
 
diff --git a/multipathd/main.h b/multipathd/main.h
index 4fcd6402..c9b3e0fd 100644
--- a/multipathd/main.h
+++ b/multipathd/main.h
@@ -52,4 +52,6 @@ bool check_path_wwid_change(struct path *pp);
 int finish_path_init(struct path *pp, struct vectors * vecs);
 int resize_map(struct multipath *mpp, unsigned long long size,
 	       struct vectors *vecs);
+void set_pr(struct multipath *mpp);
+void unset_pr(struct multipath *mpp);
 #endif /* MAIN_H */