From e6918187568dbd01842d8d1d2c808ce16a894239 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 21 Apr 2024 13:54:28 +0200
Subject: Adding upstream version 18.2.2.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 src/osd/Session.cc | 106 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 106 insertions(+)
 create mode 100644 src/osd/Session.cc

(limited to 'src/osd/Session.cc')

diff --git a/src/osd/Session.cc b/src/osd/Session.cc
new file mode 100644
index 000000000..454e1b857
--- /dev/null
+++ b/src/osd/Session.cc
@@ -0,0 +1,106 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "PG.h"
+#include "Session.h"
+
+#include "common/debug.h"
+
+#define dout_context cct
+#define dout_subsys ceph_subsys_osd
+
+using std::map;
+using std::set;
+
+void Session::clear_backoffs()
+{
+  map<spg_t,map<hobject_t,set<ceph::ref_t<Backoff>>>> ls;
+  {
+    std::lock_guard l(backoff_lock);
+    ls.swap(backoffs);
+    backoff_count = 0;
+  }
+  for (auto& i : ls) {
+    for (auto& p : i.second) {
+      for (auto& b : p.second) {
+	std::lock_guard l(b->lock);
+	if (b->pg) {
+	  ceph_assert(b->session == this);
+	  ceph_assert(b->is_new() || b->is_acked());
+	  b->pg->rm_backoff(b);
+	  b->pg.reset();
+	  b->session.reset();
+	} else if (b->session) {
+	  ceph_assert(b->session == this);
+	  ceph_assert(b->is_deleting());
+	  b->session.reset();
+	}
+      }
+    }
+  }
+}
+
+void Session::ack_backoff(
+  CephContext *cct,
+  spg_t pgid,
+  uint64_t id,
+  const hobject_t& begin,
+  const hobject_t& end)
+{
+  std::lock_guard l(backoff_lock);
+  auto p = backoffs.find(pgid);
+  if (p == backoffs.end()) {
+    dout(20) << __func__ << " " << pgid << " " << id << " [" << begin << ","
+	     << end << ") pg not found" << dendl;
+    return;
+  }
+  auto q = p->second.find(begin);
+  if (q == p->second.end()) {
+    dout(20) << __func__ << " " << pgid << " " << id << " [" << begin << ","
+	     << end << ") begin not found" << dendl;
+    return;
+  }
+  for (auto i = q->second.begin(); i != q->second.end(); ++i) {
+    Backoff *b = (*i).get();
+    if (b->id == id) {
+      if (b->is_new()) {
+	b->state = Backoff::STATE_ACKED;
+	dout(20) << __func__ << " now " << *b << dendl;
+      } else if (b->is_deleting()) {
+	dout(20) << __func__ << " deleting " << *b << dendl;
+	q->second.erase(i);
+	--backoff_count;
+      }
+      break;
+    }
+  }
+  if (q->second.empty()) {
+    dout(20) << __func__ << " clearing begin bin " << q->first << dendl;
+    p->second.erase(q);
+    if (p->second.empty()) {
+      dout(20) << __func__ << " clearing pg bin " << p->first << dendl;
+      backoffs.erase(p);
+    }
+  }
+  ceph_assert(!backoff_count == backoffs.empty());
+}
+
+bool Session::check_backoff(
+  CephContext *cct, spg_t pgid, const hobject_t& oid, const Message *m)
+{
+  auto b = have_backoff(pgid, oid);
+  if (b) {
+    dout(10) << __func__ << " session " << this << " has backoff " << *b
+	     << " for " << *m << dendl;
+    ceph_assert(!b->is_acked() || !g_conf()->osd_debug_crash_on_ignored_backoff);
+    return true;
+  }
+  // we may race with ms_handle_reset.  it clears session->con before removing
+  // backoffs, so if we see con is cleared here we have to abort this
+  // request.
+  if (!con) {
+    dout(10) << __func__ << " session " << this << " disconnected" << dendl;
+    return true;
+  }
+  return false;
+}
-- 
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