git: 1b7d0c2ee947 - main - in_pcb: add in_pcbrele_rlock()

The branch main has been updated by kib:

URL: https://cgit.FreeBSD.org/src/commit/?id=1b7d0c2ee94748814a6c7943806ab8160e65a6f5

commit 1b7d0c2ee94748814a6c7943806ab8160e65a6f5
Author:     Konstantin Belousov <kib@FreeBSD.org>
AuthorDate: 2025-07-03 10:36:58 +0000
Commit:     Konstantin Belousov <kib@FreeBSD.org>
CommitDate: 2025-07-10 14:42:27 +0000

    in_pcb: add in_pcbrele_rlock()
    
    The helper that derefs and rlocks the provided inp.  Returns false if inp
    is still usable.
    
    Reviewed by:    glebius, markj
    Sponsored by:   Nvidia networking
    Differential revision:  https://reviews.freebsd.org/D51143
---
 sys/netinet/in_pcb.c | 17 +++++++++++++++++
 sys/netinet/in_pcb.h |  1 +
 2 files changed, 18 insertions(+)

diff --git a/sys/netinet/in_pcb.c b/sys/netinet/in_pcb.c
index bccd4b84561a..dbe48242381d 100644
--- a/sys/netinet/in_pcb.c
+++ b/sys/netinet/in_pcb.c
@@ -1744,6 +1744,23 @@ in_pcbrele(struct inpcb *inp, const inp_lookup_t lock)
 	    in_pcbrele_rlocked(inp) : in_pcbrele_wlocked(inp));
 }
 
+/*
+ * Dereference and rlock inp, for which the caller must own the
+ * reference.  Returns true if inp no longer usable, false otherwise.
+ */
+bool
+in_pcbrele_rlock(struct inpcb *inp)
+{
+	INP_RLOCK(inp);
+	if (in_pcbrele_rlocked(inp))
+		return (true);
+	if ((inp->inp_flags & INP_FREED) != 0) {
+		INP_RUNLOCK(inp);
+		return (true);
+	}
+	return (false);
+}
+
 /*
  * Unconditionally schedule an inpcb to be freed by decrementing its
  * reference count, which should occur only after the inpcb has been detached
diff --git a/sys/netinet/in_pcb.h b/sys/netinet/in_pcb.h
index 57cf15ca37fc..9e0618e87601 100644
--- a/sys/netinet/in_pcb.h
+++ b/sys/netinet/in_pcb.h
@@ -681,6 +681,7 @@ void	in_pcbref(struct inpcb *);
 bool	in_pcbrele(struct inpcb *, inp_lookup_t);
 bool	in_pcbrele_rlocked(struct inpcb *);
 bool	in_pcbrele_wlocked(struct inpcb *);
+bool	in_pcbrele_rlock(struct inpcb *inp);
 
 typedef bool inp_match_t(const struct inpcb *, void *);
 struct inpcb_iterator {