From mboxrd@z Thu Jan 1 00:00:00 1970 From: Keiichi KII Subject: [RFC][PATCH -mm 4/5] switch function of netpoll Date: Fri, 22 Dec 2006 21:15:59 +0900 Message-ID: <458BCC7F.20608@bx.jp.nec.com> References: <458BC905.7050003@bx.jp.nec.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-2022-JP Content-Transfer-Encoding: 7bit Cc: linux-kernel@vger.kernel.org, netdev@vger.kernel.org Return-path: Received: from TYO201.gate.nec.co.jp ([202.32.8.193]:43593 "EHLO tyo201.gate.nec.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1422889AbWLVMQH (ORCPT ); Fri, 22 Dec 2006 07:16:07 -0500 To: mpm@selenic.com In-Reply-To: <458BC905.7050003@bx.jp.nec.com> Sender: netdev-owner@vger.kernel.org List-Id: netdev.vger.kernel.org From: Keiichi KII This patch contains switch function of netpoll. If "enabled" attribute of certain port is '1', this port is used and the configurations of this port are uable to change. If "enabled" attribute of certain port is '0', this port isn't used and the configurations of this port are able to change. -+- /sys/class/misc/ |-+- netconsole/ |-+- port1/ | |--- id [r--r--r--] id | |--- enabled [rw-r--r--] 0: disable 1: enable, writable | ... |--- port2/ ... Signed-off-by: Keiichi KII --- [changes] 1. change active/inactive netpoll from list management to flag management. 2. change the name of switch from "enable" to "enabled". 3. return proper error value. --- linux-mm/drivers/net/netconsole.c 2006-12-22 20:54:54.495677500 +0900 +++ enhanced-netconsole/drivers/net/netconsole.c.switch 2006-12-22 16:12:54.746259250 +0900 @@ -60,6 +60,7 @@ struct netconsole_target { struct list_head list; struct kobject obj; int id; + int enabled; struct netpoll np; }; @@ -131,10 +132,19 @@ static ssize_t show_remote_mac(struct ne nt->np.remote_mac[4], nt->np.remote_mac[5]); } +static ssize_t show_enabled(struct netconsole_target *nt, char *buf) +{ + return sprintf(buf, "%d\n", nt->enabled); +} + static ssize_t store_local_port(struct netconsole_target *nt, const char *buf, size_t count) { spin_lock(&target_list_lock); + if (nt->enabled) { + spin_unlock(&target_list_lock); + return -EINVAL; + } nt->np.local_port = simple_strtol(buf, NULL, 10); spin_unlock(&target_list_lock); @@ -145,6 +155,10 @@ static ssize_t store_remote_port(struct size_t count) { spin_lock(&target_list_lock); + if (nt->enabled) { + spin_unlock(&target_list_lock); + return -EINVAL; + } nt->np.remote_port = simple_strtol(buf, NULL, 10); spin_unlock(&target_list_lock); @@ -155,6 +169,10 @@ static ssize_t store_local_ip(struct net size_t count) { spin_lock(&target_list_lock); + if (nt->enabled) { + spin_unlock(&target_list_lock); + return -EINVAL; + } nt->np.local_ip = ntohl(in_aton(buf)); spin_unlock(&target_list_lock); @@ -165,6 +183,10 @@ static ssize_t store_remote_ip(struct ne size_t count) { spin_lock(&target_list_lock); + if (nt->enabled) { + spin_unlock(&target_list_lock); + return -EINVAL; + } nt->np.remote_ip = ntohl(in_aton(buf)); spin_unlock(&target_list_lock); @@ -189,12 +211,39 @@ static ssize_t store_remote_mac(struct n cur = delim + 1; } spin_lock(&target_list_lock); + if (nt->enabled) { + spin_unlock(&target_list_lock); + return -EINVAL; + } memcpy(nt->np.remote_mac, input_mac, MAC_ADDR_DIGIT); spin_unlock(&target_list_lock); return count; } +static ssize_t store_enabled(struct netconsole_target *nt, const char *buf, + size_t count) +{ + int enabled = 0; + + if (count >= 2 && (count != 2 || buf[count - 1] != '\n')) { + printk(KERN_ERR "netconsole: invalid argument: %s\n", buf); + return -EINVAL; + } else if (strncmp(buf, "1", 1) == 0) { + enabled = 1; + } else if(strncmp(buf, "0", 1) == 0) { + enabled = 0; + } else { + printk(KERN_ERR "netconsole: invalid argument: %s\n", buf); + return -EINVAL; + } + spin_lock(&target_list_lock); + nt->enabled = enabled; + spin_unlock(&target_list_lock); + + return count; +} + static ssize_t store_remove(struct netconsole_target *nt, const char *buf, size_t count) { @@ -219,6 +268,8 @@ static NETCON_CLASS_ATTR(remote_ip, S_IR static NETCON_CLASS_ATTR(local_mac, S_IRUGO, show_local_mac, NULL); static NETCON_CLASS_ATTR(remote_mac, S_IRUGO | S_IWUSR, show_remote_mac, store_remote_mac); +static NETCON_CLASS_ATTR(enabled, S_IRUGO | S_IWUSR, + show_enabled, store_enabled); static NETCON_CLASS_ATTR(remove, S_IWUSR, NULL, store_remove); static struct attribute *target_attrs[] = { @@ -230,6 +281,7 @@ static struct attribute *target_attrs[] &target_attr_remote_ip.attr, &target_attr_local_mac.attr, &target_attr_remote_mac.attr, + &target_attr_enabled.attr, &target_attr_remove.attr, NULL }; @@ -245,7 +297,7 @@ static ssize_t show_target_attr(struct k if (na->show) return na->show(nt, buffer); else - return -EACCES; + return -EINVAL; } static ssize_t store_target_attr(struct kobject *kobj, @@ -259,7 +311,7 @@ static ssize_t store_target_attr(struct if (na->store) return na->store(nt, buffer, count); else - return -EACCES; + return -EINVAL; } static void release_target(struct kobject *kobj) @@ -325,6 +377,7 @@ static int add_target(char* target_confi atomic_inc(&target_count); new_target->id = atomic_read(&target_count); + new_target->enabled = 1; printk(KERN_INFO "netconsole: add target: " "remote ip_addr=%d.%d.%d.%d remote port=%d\n", @@ -371,7 +424,8 @@ static void write_msg(struct console *co for(left = len; left; ) { frag = min(left, MAX_PRINT_CHUNK); list_for_each_entry(target, &target_list, list) { - netpoll_send_udp(&target->np, msg, frag); + if (target->enabled) + netpoll_send_udp(&target->np, msg, frag); } msg += frag; left -= frag; -- Keiichi KII NEC Corporation OSS Promotion Center E-mail: k-keiichi@bx.jp.nec.com