Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753599AbeAAOgO (ORCPT + 1 other); Mon, 1 Jan 2018 09:36:14 -0500 Received: from mail.linuxfoundation.org ([140.211.169.12]:43760 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752947AbeAAOgK (ORCPT ); Mon, 1 Jan 2018 09:36:10 -0500 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Julian Wiedmann , "David S. Miller" Subject: [PATCH 4.9 56/75] s390/qeth: update takeover IPs after configuration change Date: Mon, 1 Jan 2018 15:32:33 +0100 Message-Id: <20180101140105.992118325@linuxfoundation.org> X-Mailer: git-send-email 2.15.1 In-Reply-To: <20180101140056.475827799@linuxfoundation.org> References: <20180101140056.475827799@linuxfoundation.org> User-Agent: quilt/0.65 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Return-Path: 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Julian Wiedmann [ Upstream commit 02f510f326501470348a5df341e8232c3497bbbb ] Any modification to the takeover IP-ranges requires that we re-evaluate which IP addresses are takeover-eligible. Otherwise we might do takeover for some addresses when we no longer should, or vice-versa. Signed-off-by: Julian Wiedmann Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- drivers/s390/net/qeth_core.h | 4 +- drivers/s390/net/qeth_core_main.c | 4 +- drivers/s390/net/qeth_l3.h | 2 - drivers/s390/net/qeth_l3_main.c | 31 ++++++++++++++++-- drivers/s390/net/qeth_l3_sys.c | 63 ++++++++++++++++++++------------------ 5 files changed, 67 insertions(+), 37 deletions(-) --- a/drivers/s390/net/qeth_core.h +++ b/drivers/s390/net/qeth_core.h @@ -577,8 +577,8 @@ enum qeth_cq { struct qeth_ipato { bool enabled; - int invert4; - int invert6; + bool invert4; + bool invert6; struct list_head entries; }; --- a/drivers/s390/net/qeth_core_main.c +++ b/drivers/s390/net/qeth_core_main.c @@ -1476,8 +1476,8 @@ static int qeth_setup_card(struct qeth_c /* IP address takeover */ INIT_LIST_HEAD(&card->ipato.entries); card->ipato.enabled = false; - card->ipato.invert4 = 0; - card->ipato.invert6 = 0; + card->ipato.invert4 = false; + card->ipato.invert6 = false; /* init QDIO stuff */ qeth_init_qdio_info(card); INIT_DELAYED_WORK(&card->buffer_reclaim_work, qeth_buffer_reclaim_work); --- a/drivers/s390/net/qeth_l3.h +++ b/drivers/s390/net/qeth_l3.h @@ -80,7 +80,7 @@ void qeth_l3_del_vipa(struct qeth_card * int qeth_l3_add_rxip(struct qeth_card *, enum qeth_prot_versions, const u8 *); void qeth_l3_del_rxip(struct qeth_card *card, enum qeth_prot_versions, const u8 *); -int qeth_l3_is_addr_covered_by_ipato(struct qeth_card *, struct qeth_ipaddr *); +void qeth_l3_update_ipato(struct qeth_card *card); struct qeth_ipaddr *qeth_l3_get_addr_buffer(enum qeth_prot_versions); int qeth_l3_add_ip(struct qeth_card *, struct qeth_ipaddr *); int qeth_l3_delete_ip(struct qeth_card *, struct qeth_ipaddr *); --- a/drivers/s390/net/qeth_l3_main.c +++ b/drivers/s390/net/qeth_l3_main.c @@ -168,8 +168,8 @@ static void qeth_l3_convert_addr_to_bits } } -int qeth_l3_is_addr_covered_by_ipato(struct qeth_card *card, - struct qeth_ipaddr *addr) +static bool qeth_l3_is_addr_covered_by_ipato(struct qeth_card *card, + struct qeth_ipaddr *addr) { struct qeth_ipato_entry *ipatoe; u8 addr_bits[128] = {0, }; @@ -608,6 +608,27 @@ int qeth_l3_setrouting_v6(struct qeth_ca /* * IP address takeover related functions */ + +/** + * qeth_l3_update_ipato() - Update 'takeover' property, for all NORMAL IPs. + * + * Caller must hold ip_lock. + */ +void qeth_l3_update_ipato(struct qeth_card *card) +{ + struct qeth_ipaddr *addr; + unsigned int i; + + hash_for_each(card->ip_htable, i, addr, hnode) { + if (addr->type != QETH_IP_TYPE_NORMAL) + continue; + if (qeth_l3_is_addr_covered_by_ipato(card, addr)) + addr->set_flags |= QETH_IPA_SETIP_TAKEOVER_FLAG; + else + addr->set_flags &= ~QETH_IPA_SETIP_TAKEOVER_FLAG; + } +} + static void qeth_l3_clear_ipato_list(struct qeth_card *card) { struct qeth_ipato_entry *ipatoe, *tmp; @@ -619,6 +640,7 @@ static void qeth_l3_clear_ipato_list(str kfree(ipatoe); } + qeth_l3_update_ipato(card); spin_unlock_bh(&card->ip_lock); } @@ -643,8 +665,10 @@ int qeth_l3_add_ipato_entry(struct qeth_ } } - if (!rc) + if (!rc) { list_add_tail(&new->entry, &card->ipato.entries); + qeth_l3_update_ipato(card); + } spin_unlock_bh(&card->ip_lock); @@ -667,6 +691,7 @@ void qeth_l3_del_ipato_entry(struct qeth (proto == QETH_PROT_IPV4)? 4:16) && (ipatoe->mask_bits == mask_bits)) { list_del(&ipatoe->entry); + qeth_l3_update_ipato(card); kfree(ipatoe); } } --- a/drivers/s390/net/qeth_l3_sys.c +++ b/drivers/s390/net/qeth_l3_sys.c @@ -372,9 +372,8 @@ static ssize_t qeth_l3_dev_ipato_enable_ struct device_attribute *attr, const char *buf, size_t count) { struct qeth_card *card = dev_get_drvdata(dev); - struct qeth_ipaddr *addr; - int i, rc = 0; bool enable; + int rc = 0; if (!card) return -EINVAL; @@ -393,20 +392,12 @@ static ssize_t qeth_l3_dev_ipato_enable_ goto out; } - if (card->ipato.enabled == enable) - goto out; - card->ipato.enabled = enable; - - spin_lock_bh(&card->ip_lock); - hash_for_each(card->ip_htable, i, addr, hnode) { - if (addr->type != QETH_IP_TYPE_NORMAL) - continue; - if (!enable) - addr->set_flags &= ~QETH_IPA_SETIP_TAKEOVER_FLAG; - else if (qeth_l3_is_addr_covered_by_ipato(card, addr)) - addr->set_flags |= QETH_IPA_SETIP_TAKEOVER_FLAG; + if (card->ipato.enabled != enable) { + card->ipato.enabled = enable; + spin_lock_bh(&card->ip_lock); + qeth_l3_update_ipato(card); + spin_unlock_bh(&card->ip_lock); } - spin_unlock_bh(&card->ip_lock); out: mutex_unlock(&card->conf_mutex); return rc ? rc : count; @@ -432,20 +423,27 @@ static ssize_t qeth_l3_dev_ipato_invert4 const char *buf, size_t count) { struct qeth_card *card = dev_get_drvdata(dev); + bool invert; int rc = 0; if (!card) return -EINVAL; mutex_lock(&card->conf_mutex); - if (sysfs_streq(buf, "toggle")) - card->ipato.invert4 = (card->ipato.invert4)? 0 : 1; - else if (sysfs_streq(buf, "1")) - card->ipato.invert4 = 1; - else if (sysfs_streq(buf, "0")) - card->ipato.invert4 = 0; - else + if (sysfs_streq(buf, "toggle")) { + invert = !card->ipato.invert4; + } else if (kstrtobool(buf, &invert)) { rc = -EINVAL; + goto out; + } + + if (card->ipato.invert4 != invert) { + card->ipato.invert4 = invert; + spin_lock_bh(&card->ip_lock); + qeth_l3_update_ipato(card); + spin_unlock_bh(&card->ip_lock); + } +out: mutex_unlock(&card->conf_mutex); return rc ? rc : count; } @@ -611,20 +609,27 @@ static ssize_t qeth_l3_dev_ipato_invert6 struct device_attribute *attr, const char *buf, size_t count) { struct qeth_card *card = dev_get_drvdata(dev); + bool invert; int rc = 0; if (!card) return -EINVAL; mutex_lock(&card->conf_mutex); - if (sysfs_streq(buf, "toggle")) - card->ipato.invert6 = (card->ipato.invert6)? 0 : 1; - else if (sysfs_streq(buf, "1")) - card->ipato.invert6 = 1; - else if (sysfs_streq(buf, "0")) - card->ipato.invert6 = 0; - else + if (sysfs_streq(buf, "toggle")) { + invert = !card->ipato.invert6; + } else if (kstrtobool(buf, &invert)) { rc = -EINVAL; + goto out; + } + + if (card->ipato.invert6 != invert) { + card->ipato.invert6 = invert; + spin_lock_bh(&card->ip_lock); + qeth_l3_update_ipato(card); + spin_unlock_bh(&card->ip_lock); + } +out: mutex_unlock(&card->conf_mutex); return rc ? rc : count; }