From 2d921c321ca670201abe9eff5e53585c39e68f5e Mon Sep 17 00:00:00 2001 From: Ursula Braun Date: Tue, 1 Apr 2008 10:26:53 +0200 Subject: [PATCH] qeth: improve ip_list administration after deregister failures 1. ip_list handling after deregister failure of multicast address: If error code "MC Address not found" is returned do not re-add multicast address to ip_list. For other error codes readd multicast address at the end of function qeth_delete_all_mc. 2. ip_list handling after deregister failure or normal ip address: If error code "IP Address not found" is returned do not re-add multicast address to ip list. This is especially important in IP address takeover scenarios, to enable re-takeover of a taken over IP address. Signed-off-by: Ursula Braun Signed-off-by: Frank Blaschka Signed-off-by: Jeff Garzik --- drivers/s390/net/qeth_core_mpc.c | 2 +- drivers/s390/net/qeth_core_mpc.h | 2 +- drivers/s390/net/qeth_l3_main.c | 14 +++++++++----- 3 files changed, 11 insertions(+), 7 deletions(-) diff --git a/drivers/s390/net/qeth_core_mpc.c b/drivers/s390/net/qeth_core_mpc.c index 8653b73e5dcf..441533f2062e 100644 --- a/drivers/s390/net/qeth_core_mpc.c +++ b/drivers/s390/net/qeth_core_mpc.c @@ -195,7 +195,7 @@ static struct ipa_rc_msg qeth_ipa_rc_msg[] = { {IPA_RC_SETIP_NO_STARTLAN, "Setip no startlan received"}, {IPA_RC_SETIP_ALREADY_RECEIVED, "Setip already received"}, {IPA_RC_IP_ADDR_ALREADY_USED, "IP address already in use on LAN"}, - {IPA_RC_MULTICAST_FULL, "No task available, multicast full"}, + {IPA_RC_MC_ADDR_NOT_FOUND, "Multicast address not found"}, {IPA_RC_SETIP_INVALID_VERSION, "SETIP invalid IP version"}, {IPA_RC_UNSUPPORTED_SUBCMD, "Unsupported assist subcommand"}, {IPA_RC_ARP_ASSIST_NO_ENABLE, "Only partial success, no enable"}, diff --git a/drivers/s390/net/qeth_core_mpc.h b/drivers/s390/net/qeth_core_mpc.h index de221932f30f..18548822e37c 100644 --- a/drivers/s390/net/qeth_core_mpc.h +++ b/drivers/s390/net/qeth_core_mpc.h @@ -182,7 +182,7 @@ enum qeth_ipa_return_codes { IPA_RC_SETIP_NO_STARTLAN = 0xe008, IPA_RC_SETIP_ALREADY_RECEIVED = 0xe009, IPA_RC_IP_ADDR_ALREADY_USED = 0xe00a, - IPA_RC_MULTICAST_FULL = 0xe00b, + IPA_RC_MC_ADDR_NOT_FOUND = 0xe00b, IPA_RC_SETIP_INVALID_VERSION = 0xe00d, IPA_RC_UNSUPPORTED_SUBCMD = 0xe00e, IPA_RC_ARP_ASSIST_NO_ENABLE = 0xe00f, diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c index 21c439046b3c..1013a2a8ec00 100644 --- a/drivers/s390/net/qeth_l3_main.c +++ b/drivers/s390/net/qeth_l3_main.c @@ -401,8 +401,11 @@ static int __qeth_l3_ref_ip_on_card(struct qeth_card *card, static void __qeth_l3_delete_all_mc(struct qeth_card *card, unsigned long *flags) { + struct list_head fail_list; struct qeth_ipaddr *addr, *tmp; int rc; + + INIT_LIST_HEAD(&fail_list); again: list_for_each_entry_safe(addr, tmp, &card->ip_list, entry) { if (addr->is_multicast) { @@ -410,13 +413,14 @@ again: spin_unlock_irqrestore(&card->ip_lock, *flags); rc = qeth_l3_deregister_addr_entry(card, addr); spin_lock_irqsave(&card->ip_lock, *flags); - if (!rc) { + if (!rc || (rc == IPA_RC_MC_ADDR_NOT_FOUND)) kfree(addr); - goto again; - } else - list_add(&addr->entry, &card->ip_list); + else + list_add_tail(&addr->entry, &fail_list); + goto again; } } + list_splice(&fail_list, &card->ip_list); } static void qeth_l3_set_ip_addr_list(struct qeth_card *card) @@ -467,7 +471,7 @@ static void qeth_l3_set_ip_addr_list(struct qeth_card *card) spin_unlock_irqrestore(&card->ip_lock, flags); rc = qeth_l3_deregister_addr_entry(card, addr); spin_lock_irqsave(&card->ip_lock, flags); - if (!rc) + if (!rc || (rc == IPA_RC_PRIMARY_ALREADY_DEFINED)) kfree(addr); else list_add_tail(&addr->entry, &card->ip_list); -- 2.30.2