git: d1a8fa2e0f41 - main - ctld: Only check physical port linking in a single configuration context

The branch main has been updated by jhb:

URL: https://cgit.FreeBSD.org/src/commit/?id=d1a8fa2e0f415f941e628f959fa0e70f23058fdb

commit d1a8fa2e0f415f941e628f959fa0e70f23058fdb
Author:     John Baldwin <jhb@FreeBSD.org>
AuthorDate: 2026-05-27 20:57:38 +0000
Commit:     John Baldwin <jhb@FreeBSD.org>
CommitDate: 2026-05-27 20:57:38 +0000

    ctld: Only check physical port linking in a single configuration context
    
    Commit 969876fcee57 moved struct pport from being per-configuration to
    being a "global" object shared across multiple configurations.  As a
    result, the check for duplicate ports actually spanned across
    configurations, such that reloading a configuration would now think
    that existing physical ports were already linked.
    
    The linking field in pport added in the C++-ification (commit
    6acc7afa34aa) faithfully replicated this bug (albeit simpler as I had
    noticed that the TAILQ links weren't used after the earlier commit).
    
    To restore the desired behavior, remove the linking field from struct
    pport entirely and use a local unordered_map in conf::add_pports which
    tracks if a given pport is claimed by more than one target.
    
    PR:             293076
    Reported by:    Ken J. Thomson <thomsonk@yandex.com>
    Fixes:          969876fcee57 ("ctld: parse config file independently of getting kernel info")
    Sponsored by:   Chelsio Communications
    Differential Revision:  https://reviews.freebsd.org/D57093
---
 usr.sbin/ctld/ctld.cc | 12 +++++++-----
 usr.sbin/ctld/ctld.hh |  4 ----
 2 files changed, 7 insertions(+), 9 deletions(-)

diff --git a/usr.sbin/ctld/ctld.cc b/usr.sbin/ctld/ctld.cc
index 8b99bde14911..834bef4ef363 100644
--- a/usr.sbin/ctld/ctld.cc
+++ b/usr.sbin/ctld/ctld.cc
@@ -1175,7 +1175,6 @@ conf::add_port(struct target *target, struct pport *pp)
 		return (false);
 	}
 
-	pp->link();
 	return (true);
 }
 
@@ -2641,6 +2640,7 @@ conf_new_from_file(const char *path, bool ucl)
 bool
 conf::add_pports(struct kports &kports)
 {
+	std::unordered_map<struct pport *, struct target *> linked_ports;
 	struct pport *pp;
 	int ret, i_pp, i_vp;
 
@@ -2654,11 +2654,13 @@ conf::add_pports(struct kports &kports)
 			 */
 			pp = kports.find_port(pport);
 			if (pp != nullptr) {
-				if (pp->linked()) {
+				const auto &pair = linked_ports.try_emplace(pp,
+				    targ);
+				if (!pair.second) {
 					log_warnx("can't link port \"%s\" to "
-					    "%s, port already linked to some "
-					    "target", pport.c_str(),
-					    targ->label());
+					    "%s, port already linked to %s",
+					    pport.c_str(), targ->label(),
+					    pair.first->second->label());
 					return (false);
 				}
 
diff --git a/usr.sbin/ctld/ctld.hh b/usr.sbin/ctld/ctld.hh
index 8d63de06dd80..3bc92449e372 100644
--- a/usr.sbin/ctld/ctld.hh
+++ b/usr.sbin/ctld/ctld.hh
@@ -567,13 +567,9 @@ struct pport {
 	const char *name() const { return pp_name.c_str(); }
 	uint32_t ctl_port() const { return pp_ctl_port; }
 
-	bool linked() const { return pp_linked; }
-	void link() { pp_linked = true; }
-
 private:
 	std::string			pp_name;
 	uint32_t			pp_ctl_port;
-	bool				pp_linked = false;
 };
 
 struct kports {