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bh=eUUHE0BcTCfS29wc4RdIQIT3Ig9yu6Crov8DsGjQZFU=; b=Lj+WZqawsXVhzFEh1FJ65Gw31fREezt+a/IwMIknbMWrQ1KPQoXCm4IpPZQqfMhFgiPL0y orlTaYIBaB5ENwEwcnek4rh1gO+SI0VurSvM4KahpxYtTXRxQpsdm8hIjMhAr6zfdoBO10 AQs+HbBAw2Dsu4z/Rx0l9nEepfAyo1w= From: Sven Eckelmann To: b.a.t.m.a.n@lists.open-mesh.org Cc: simonwunderlich Subject: Re: [PATCH RFC batadv v2 4/5] batman-adv: limit numbers of parallel learned BLA backbones Date: Tue, 19 May 2026 11:10:52 +0200 Message-ID: <6472795.lOV4Wx5bFT@ripper> In-Reply-To: <20260519-resource-limit-v2-4-489c3c919a54@narfation.org> References: <20260519-resource-limit-v2-0-489c3c919a54@narfation.org> <20260519-resource-limit-v2-4-489c3c919a54@narfation.org> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart5306013.31r3eYUQgx"; micalg="pgp-sha512"; protocol="application/pgp-signature" Message-ID-Hash: WH5TPDEVD4TNN7325CCFBR7UDTL5YPQE X-Message-ID-Hash: WH5TPDEVD4TNN7325CCFBR7UDTL5YPQE X-MailFrom: sven@narfation.org X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; loop; banned-address; header-match-b.a.t.m.a.n.lists.open-mesh.org-0; header-match-b.a.t.m.a.n.lists.open-mesh.org-1; header-match-b.a.t.m.a.n.lists.open-mesh.org-2; header-match-b.a.t.m.a.n.lists.open-mesh.org-3; emergency; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header X-Mailman-Version: 3.3.10 Precedence: list List-Id: The list for a Better Approach To Mobile Ad-hoc Networking Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: --nextPart5306013.31r3eYUQgx Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="utf-8"; protected-headers="v1" From: Sven Eckelmann To: b.a.t.m.a.n@lists.open-mesh.org Cc: simonwunderlich Date: Tue, 19 May 2026 11:10:52 +0200 Message-ID: <6472795.lOV4Wx5bFT@ripper> In-Reply-To: <20260519-resource-limit-v2-4-489c3c919a54@narfation.org> MIME-Version: 1.0 On Tuesday, 19 May 2026 09:02:18 CEST Sven Eckelmann wrote: > @@ -505,6 +507,11 @@ batadv_bla_get_backbone_gw(struct batadv_priv *bat_priv, const u8 *orig, > "%s(): not found (%pM, %d), creating new entry\n", __func__, > orig, batadv_print_vid(vid)); > > + bla_backbone_max_learned = READ_ONCE(bat_priv->bla_backbone_max_learned); > + bla_backbone_learned = atomic_read(&bat_priv->bla_backbone_learned); > + if (bla_backbone_max_learned && bla_backbone_learned >= bla_backbone_max_learned) > + return NULL; > + > entry = kzalloc_obj(*entry, GFP_ATOMIC); > if (!entry) > return NULL; @Simon: remark from Sashiko, should we actually exempt own_gateway? @@ -508,10 +508,12 @@ batadv_bla_get_backbone_gw(struct batadv_priv *bat_priv, const u8 *orig, "%s(): not found (%pM, %d), creating new entry\n", __func__, orig, batadv_print_vid(vid)); - bla_backbone_max_learned = READ_ONCE(bat_priv->bla_backbone_max_learned); - bla_backbone_learned = atomic_read(&bat_priv->bla_backbone_learned); - if (bla_backbone_max_learned && bla_backbone_learned >= bla_backbone_max_learned) - return NULL; + if (!own_backbone) { + bla_backbone_max_learned = READ_ONCE(bat_priv->bla_backbone_max_learned); + bla_backbone_learned = atomic_read(&bat_priv->bla_backbone_learned); + if (bla_backbone_max_learned && bla_backbone_learned >= bla_backbone_max_learned) + return NULL; + } entry = kzalloc_obj(*entry, GFP_ATOMIC); if (!entry) @@ -539,7 +541,10 @@ batadv_bla_get_backbone_gw(struct batadv_priv *bat_priv, const u8 *orig, if (unlikely(hash_added != 0)) { /* hash failed, free the structure */ kfree(entry); - atomic_dec(&bat_priv->bla_backbone_learned); + + if (!own_backbone) + atomic_dec(&bat_priv->bla_backbone_learned); + return NULL; } Regards, Sven --nextPart5306013.31r3eYUQgx Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part. 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