netconsole: use per-attribute show and store methods
Note that the old code actually used the store_attributes method to do locking, this is moved into the individual methods. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>hifive-unleashed-5.1
Christoph Hellwig
Nicholas Bellinger
parent
2eafd72939
commit
ea9ed9cff4
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@ -244,15 +244,6 @@ static void free_param_target(struct netconsole_target *nt)
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* <target>/...
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*/
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struct netconsole_target_attr {
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struct configfs_attribute attr;
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ssize_t (*show)(struct netconsole_target *nt,
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char *buf);
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ssize_t (*store)(struct netconsole_target *nt,
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const char *buf,
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size_t count);
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};
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static struct netconsole_target *to_target(struct config_item *item)
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{
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return item ?
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@ -264,58 +255,62 @@ static struct netconsole_target *to_target(struct config_item *item)
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* Attribute operations for netconsole_target.
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*/
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static ssize_t show_enabled(struct netconsole_target *nt, char *buf)
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static ssize_t enabled_show(struct config_item *item, char *buf)
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{
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return snprintf(buf, PAGE_SIZE, "%d\n", nt->enabled);
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return snprintf(buf, PAGE_SIZE, "%d\n", to_target(item)->enabled);
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}
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static ssize_t show_extended(struct netconsole_target *nt, char *buf)
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static ssize_t extended_show(struct config_item *item, char *buf)
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{
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return snprintf(buf, PAGE_SIZE, "%d\n", nt->extended);
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return snprintf(buf, PAGE_SIZE, "%d\n", to_target(item)->extended);
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}
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static ssize_t show_dev_name(struct netconsole_target *nt, char *buf)
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static ssize_t dev_name_show(struct config_item *item, char *buf)
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{
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return snprintf(buf, PAGE_SIZE, "%s\n", nt->np.dev_name);
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return snprintf(buf, PAGE_SIZE, "%s\n", to_target(item)->np.dev_name);
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}
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static ssize_t show_local_port(struct netconsole_target *nt, char *buf)
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static ssize_t local_port_show(struct config_item *item, char *buf)
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{
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return snprintf(buf, PAGE_SIZE, "%d\n", nt->np.local_port);
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return snprintf(buf, PAGE_SIZE, "%d\n", to_target(item)->np.local_port);
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}
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static ssize_t show_remote_port(struct netconsole_target *nt, char *buf)
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static ssize_t remote_port_show(struct config_item *item, char *buf)
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{
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return snprintf(buf, PAGE_SIZE, "%d\n", nt->np.remote_port);
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return snprintf(buf, PAGE_SIZE, "%d\n", to_target(item)->np.remote_port);
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}
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static ssize_t show_local_ip(struct netconsole_target *nt, char *buf)
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static ssize_t local_ip_show(struct config_item *item, char *buf)
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{
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struct netconsole_target *nt = to_target(item);
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if (nt->np.ipv6)
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return snprintf(buf, PAGE_SIZE, "%pI6c\n", &nt->np.local_ip.in6);
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else
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return snprintf(buf, PAGE_SIZE, "%pI4\n", &nt->np.local_ip);
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}
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static ssize_t show_remote_ip(struct netconsole_target *nt, char *buf)
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static ssize_t remote_ip_show(struct config_item *item, char *buf)
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{
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struct netconsole_target *nt = to_target(item);
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if (nt->np.ipv6)
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return snprintf(buf, PAGE_SIZE, "%pI6c\n", &nt->np.remote_ip.in6);
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else
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return snprintf(buf, PAGE_SIZE, "%pI4\n", &nt->np.remote_ip);
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}
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static ssize_t show_local_mac(struct netconsole_target *nt, char *buf)
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static ssize_t local_mac_show(struct config_item *item, char *buf)
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{
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struct net_device *dev = nt->np.dev;
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struct net_device *dev = to_target(item)->np.dev;
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static const u8 bcast[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
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return snprintf(buf, PAGE_SIZE, "%pM\n", dev ? dev->dev_addr : bcast);
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}
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static ssize_t show_remote_mac(struct netconsole_target *nt, char *buf)
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static ssize_t remote_mac_show(struct config_item *item, char *buf)
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{
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return snprintf(buf, PAGE_SIZE, "%pM\n", nt->np.remote_mac);
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return snprintf(buf, PAGE_SIZE, "%pM\n", to_target(item)->np.remote_mac);
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}
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/*
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@ -325,23 +320,26 @@ static ssize_t show_remote_mac(struct netconsole_target *nt, char *buf)
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* would enable him to dynamically add new netpoll targets for new
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* network interfaces as and when they come up).
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*/
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static ssize_t store_enabled(struct netconsole_target *nt,
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const char *buf,
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size_t count)
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static ssize_t enabled_store(struct config_item *item,
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const char *buf, size_t count)
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{
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struct netconsole_target *nt = to_target(item);
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unsigned long flags;
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int enabled;
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int err;
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mutex_lock(&dynamic_netconsole_mutex);
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err = kstrtoint(buf, 10, &enabled);
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if (err < 0)
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return err;
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goto out_unlock;
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err = -EINVAL;
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if (enabled < 0 || enabled > 1)
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return -EINVAL;
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goto out_unlock;
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if ((bool)enabled == nt->enabled) {
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pr_info("network logging has already %s\n",
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nt->enabled ? "started" : "stopped");
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return -EINVAL;
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goto out_unlock;
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}
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if (enabled) { /* true */
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@ -358,7 +356,7 @@ static ssize_t store_enabled(struct netconsole_target *nt,
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err = netpoll_setup(&nt->np);
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if (err)
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return err;
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goto out_unlock;
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pr_info("netconsole: network logging started\n");
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} else { /* false */
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@ -374,42 +372,56 @@ static ssize_t store_enabled(struct netconsole_target *nt,
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nt->enabled = enabled;
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mutex_unlock(&dynamic_netconsole_mutex);
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return strnlen(buf, count);
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out_unlock:
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mutex_unlock(&dynamic_netconsole_mutex);
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return err;
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}
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static ssize_t store_extended(struct netconsole_target *nt,
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const char *buf,
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size_t count)
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static ssize_t extended_store(struct config_item *item, const char *buf,
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size_t count)
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{
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struct netconsole_target *nt = to_target(item);
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int extended;
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int err;
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mutex_lock(&dynamic_netconsole_mutex);
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if (nt->enabled) {
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pr_err("target (%s) is enabled, disable to update parameters\n",
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config_item_name(&nt->item));
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return -EINVAL;
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err = -EINVAL;
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goto out_unlock;
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}
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err = kstrtoint(buf, 10, &extended);
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if (err < 0)
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return err;
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if (extended < 0 || extended > 1)
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return -EINVAL;
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goto out_unlock;
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if (extended < 0 || extended > 1) {
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err = -EINVAL;
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goto out_unlock;
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}
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nt->extended = extended;
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mutex_unlock(&dynamic_netconsole_mutex);
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return strnlen(buf, count);
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out_unlock:
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mutex_unlock(&dynamic_netconsole_mutex);
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return err;
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}
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static ssize_t store_dev_name(struct netconsole_target *nt,
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const char *buf,
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size_t count)
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static ssize_t dev_name_store(struct config_item *item, const char *buf,
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size_t count)
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{
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struct netconsole_target *nt = to_target(item);
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size_t len;
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mutex_lock(&dynamic_netconsole_mutex);
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if (nt->enabled) {
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pr_err("target (%s) is enabled, disable to update parameters\n",
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config_item_name(&nt->item));
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mutex_unlock(&dynamic_netconsole_mutex);
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return -EINVAL;
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}
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@ -420,53 +432,66 @@ static ssize_t store_dev_name(struct netconsole_target *nt,
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if (nt->np.dev_name[len - 1] == '\n')
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nt->np.dev_name[len - 1] = '\0';
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mutex_unlock(&dynamic_netconsole_mutex);
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return strnlen(buf, count);
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}
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static ssize_t store_local_port(struct netconsole_target *nt,
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const char *buf,
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size_t count)
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static ssize_t local_port_store(struct config_item *item, const char *buf,
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size_t count)
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{
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int rv;
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struct netconsole_target *nt = to_target(item);
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int rv = -EINVAL;
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mutex_lock(&dynamic_netconsole_mutex);
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if (nt->enabled) {
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pr_err("target (%s) is enabled, disable to update parameters\n",
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config_item_name(&nt->item));
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return -EINVAL;
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goto out_unlock;
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}
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rv = kstrtou16(buf, 10, &nt->np.local_port);
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if (rv < 0)
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return rv;
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goto out_unlock;
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mutex_unlock(&dynamic_netconsole_mutex);
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return strnlen(buf, count);
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out_unlock:
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mutex_unlock(&dynamic_netconsole_mutex);
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return rv;
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}
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static ssize_t store_remote_port(struct netconsole_target *nt,
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const char *buf,
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size_t count)
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static ssize_t remote_port_store(struct config_item *item,
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const char *buf, size_t count)
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{
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int rv;
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struct netconsole_target *nt = to_target(item);
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int rv = -EINVAL;
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mutex_lock(&dynamic_netconsole_mutex);
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if (nt->enabled) {
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pr_err("target (%s) is enabled, disable to update parameters\n",
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config_item_name(&nt->item));
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return -EINVAL;
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goto out_unlock;
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}
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rv = kstrtou16(buf, 10, &nt->np.remote_port);
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if (rv < 0)
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return rv;
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goto out_unlock;
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mutex_unlock(&dynamic_netconsole_mutex);
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return strnlen(buf, count);
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out_unlock:
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mutex_unlock(&dynamic_netconsole_mutex);
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return rv;
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}
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static ssize_t store_local_ip(struct netconsole_target *nt,
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const char *buf,
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size_t count)
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static ssize_t local_ip_store(struct config_item *item, const char *buf,
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size_t count)
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{
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struct netconsole_target *nt = to_target(item);
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mutex_lock(&dynamic_netconsole_mutex);
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if (nt->enabled) {
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pr_err("target (%s) is enabled, disable to update parameters\n",
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config_item_name(&nt->item));
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return -EINVAL;
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goto out_unlock;
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}
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if (strnchr(buf, count, ':')) {
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@ -474,29 +499,35 @@ static ssize_t store_local_ip(struct netconsole_target *nt,
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if (in6_pton(buf, count, nt->np.local_ip.in6.s6_addr, -1, &end) > 0) {
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if (*end && *end != '\n') {
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pr_err("invalid IPv6 address at: <%c>\n", *end);
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return -EINVAL;
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goto out_unlock;
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}
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nt->np.ipv6 = true;
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} else
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return -EINVAL;
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goto out_unlock;
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} else {
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if (!nt->np.ipv6) {
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nt->np.local_ip.ip = in_aton(buf);
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} else
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return -EINVAL;
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goto out_unlock;
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}
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mutex_unlock(&dynamic_netconsole_mutex);
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return strnlen(buf, count);
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out_unlock:
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mutex_unlock(&dynamic_netconsole_mutex);
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return -EINVAL;
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}
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static ssize_t store_remote_ip(struct netconsole_target *nt,
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const char *buf,
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size_t count)
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static ssize_t remote_ip_store(struct config_item *item, const char *buf,
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size_t count)
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{
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struct netconsole_target *nt = to_target(item);
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mutex_lock(&dynamic_netconsole_mutex);
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if (nt->enabled) {
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pr_err("target (%s) is enabled, disable to update parameters\n",
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config_item_name(&nt->item));
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return -EINVAL;
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goto out_unlock;
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}
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if (strnchr(buf, count, ':')) {
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@ -504,74 +535,71 @@ static ssize_t store_remote_ip(struct netconsole_target *nt,
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if (in6_pton(buf, count, nt->np.remote_ip.in6.s6_addr, -1, &end) > 0) {
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if (*end && *end != '\n') {
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pr_err("invalid IPv6 address at: <%c>\n", *end);
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return -EINVAL;
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goto out_unlock;
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}
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nt->np.ipv6 = true;
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} else
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return -EINVAL;
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goto out_unlock;
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} else {
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if (!nt->np.ipv6) {
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nt->np.remote_ip.ip = in_aton(buf);
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} else
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return -EINVAL;
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goto out_unlock;
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}
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mutex_unlock(&dynamic_netconsole_mutex);
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return strnlen(buf, count);
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out_unlock:
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mutex_unlock(&dynamic_netconsole_mutex);
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return -EINVAL;
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}
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static ssize_t store_remote_mac(struct netconsole_target *nt,
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const char *buf,
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size_t count)
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static ssize_t remote_mac_store(struct config_item *item, const char *buf,
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size_t count)
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{
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struct netconsole_target *nt = to_target(item);
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u8 remote_mac[ETH_ALEN];
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mutex_lock(&dynamic_netconsole_mutex);
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if (nt->enabled) {
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pr_err("target (%s) is enabled, disable to update parameters\n",
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config_item_name(&nt->item));
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return -EINVAL;
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goto out_unlock;
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}
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if (!mac_pton(buf, remote_mac))
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return -EINVAL;
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goto out_unlock;
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if (buf[3 * ETH_ALEN - 1] && buf[3 * ETH_ALEN - 1] != '\n')
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return -EINVAL;
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goto out_unlock;
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memcpy(nt->np.remote_mac, remote_mac, ETH_ALEN);
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mutex_unlock(&dynamic_netconsole_mutex);
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return strnlen(buf, count);
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out_unlock:
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mutex_unlock(&dynamic_netconsole_mutex);
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return -EINVAL;
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}
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/*
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* Attribute definitions for netconsole_target.
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*/
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#define NETCONSOLE_TARGET_ATTR_RO(_name) \
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static struct netconsole_target_attr netconsole_target_##_name = \
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__CONFIGFS_ATTR(_name, S_IRUGO, show_##_name, NULL)
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#define NETCONSOLE_TARGET_ATTR_RW(_name) \
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static struct netconsole_target_attr netconsole_target_##_name = \
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__CONFIGFS_ATTR(_name, S_IRUGO | S_IWUSR, show_##_name, store_##_name)
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NETCONSOLE_TARGET_ATTR_RW(enabled);
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NETCONSOLE_TARGET_ATTR_RW(extended);
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NETCONSOLE_TARGET_ATTR_RW(dev_name);
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NETCONSOLE_TARGET_ATTR_RW(local_port);
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NETCONSOLE_TARGET_ATTR_RW(remote_port);
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NETCONSOLE_TARGET_ATTR_RW(local_ip);
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NETCONSOLE_TARGET_ATTR_RW(remote_ip);
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NETCONSOLE_TARGET_ATTR_RO(local_mac);
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NETCONSOLE_TARGET_ATTR_RW(remote_mac);
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CONFIGFS_ATTR(, enabled);
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CONFIGFS_ATTR(, extended);
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CONFIGFS_ATTR(, dev_name);
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CONFIGFS_ATTR(, local_port);
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CONFIGFS_ATTR(, remote_port);
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CONFIGFS_ATTR(, local_ip);
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CONFIGFS_ATTR(, remote_ip);
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CONFIGFS_ATTR_RO(, local_mac);
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CONFIGFS_ATTR(, remote_mac);
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static struct configfs_attribute *netconsole_target_attrs[] = {
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&netconsole_target_enabled.attr,
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&netconsole_target_extended.attr,
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&netconsole_target_dev_name.attr,
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&netconsole_target_local_port.attr,
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&netconsole_target_remote_port.attr,
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&netconsole_target_local_ip.attr,
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&netconsole_target_remote_ip.attr,
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&netconsole_target_local_mac.attr,
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&netconsole_target_remote_mac.attr,
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&attr_enabled,
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&attr_extended,
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&attr_dev_name,
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&attr_local_port,
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&attr_remote_port,
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&attr_local_ip,
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&attr_remote_ip,
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&attr_local_mac,
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&attr_remote_mac,
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NULL,
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};
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@ -584,43 +612,8 @@ static void netconsole_target_release(struct config_item *item)
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kfree(to_target(item));
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}
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static ssize_t netconsole_target_attr_show(struct config_item *item,
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struct configfs_attribute *attr,
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char *buf)
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{
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ssize_t ret = -EINVAL;
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struct netconsole_target *nt = to_target(item);
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struct netconsole_target_attr *na =
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container_of(attr, struct netconsole_target_attr, attr);
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if (na->show)
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ret = na->show(nt, buf);
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||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static ssize_t netconsole_target_attr_store(struct config_item *item,
|
||||
struct configfs_attribute *attr,
|
||||
const char *buf,
|
||||
size_t count)
|
||||
{
|
||||
ssize_t ret = -EINVAL;
|
||||
struct netconsole_target *nt = to_target(item);
|
||||
struct netconsole_target_attr *na =
|
||||
container_of(attr, struct netconsole_target_attr, attr);
|
||||
|
||||
mutex_lock(&dynamic_netconsole_mutex);
|
||||
if (na->store)
|
||||
ret = na->store(nt, buf, count);
|
||||
mutex_unlock(&dynamic_netconsole_mutex);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static struct configfs_item_operations netconsole_target_item_ops = {
|
||||
.release = netconsole_target_release,
|
||||
.show_attribute = netconsole_target_attr_show,
|
||||
.store_attribute = netconsole_target_attr_store,
|
||||
};
|
||||
|
||||
static struct config_item_type netconsole_target_type = {
|
||||
|
|
|
|||
Loading…
Reference in New Issue