The branch main has been updated by kib:
URL:
https://cgit.FreeBSD.org/src/commit/?id=1b7d0c2ee94748814a6c7943806ab8160e65a6f5
commit 1b7d0c2ee94748814a6c7943806ab8160e65a6f5
Author: Konstantin Belousov <k...@freebsd.org>
AuthorDate: 2025-07-03 10:36:58 +0000
Commit: Konstantin Belousov <k...@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 {
