From: sfeldma@cumulusnetworks.com Date: Mon, 16 Dec 2013 00:41:51 +0000 (-0800) Subject: bonding: add primary attribute netlink support X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=0a98a0d12c40f9354b942325045cae123d594341;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git bonding: add primary attribute netlink support Add IFLA_BOND_PRIMARY to allow get/set of bonding parameter primary via netlink. Signed-off-by: Scott Feldman Signed-off-by: David S. Miller --- diff --git a/drivers/net/bonding/bond_netlink.c b/drivers/net/bonding/bond_netlink.c index 990793dcccde..9445243593fc 100644 --- a/drivers/net/bonding/bond_netlink.c +++ b/drivers/net/bonding/bond_netlink.c @@ -32,6 +32,7 @@ static const struct nla_policy bond_policy[IFLA_BOND_MAX + 1] = { [IFLA_BOND_ARP_IP_TARGET] = { .type = NLA_NESTED }, [IFLA_BOND_ARP_VALIDATE] = { .type = NLA_U32 }, [IFLA_BOND_ARP_ALL_TARGETS] = { .type = NLA_U32 }, + [IFLA_BOND_PRIMARY] = { .type = NLA_U32 }, }; static int bond_validate(struct nlattr *tb[], struct nlattr *data[]) @@ -154,6 +155,19 @@ static int bond_changelink(struct net_device *bond_dev, if (err) return err; } + if (data[IFLA_BOND_PRIMARY]) { + int ifindex = nla_get_u32(data[IFLA_BOND_PRIMARY]); + struct net_device *dev; + char *primary = ""; + + dev = __dev_get_by_index(dev_net(bond_dev), ifindex); + if (dev) + primary = dev->name; + + err = bond_option_primary_set(bond, primary); + if (err) + return err; + } return 0; } @@ -182,6 +196,7 @@ static size_t bond_get_size(const struct net_device *bond_dev) nla_total_size(sizeof(u32)) * BOND_MAX_ARP_TARGETS + nla_total_size(sizeof(u32)) + /* IFLA_BOND_ARP_VALIDATE */ nla_total_size(sizeof(u32)) + /* IFLA_BOND_ARP_ALL_TARGETS */ + nla_total_size(sizeof(u32)) + /* IFLA_BOND_PRIMARY */ 0; } @@ -241,6 +256,11 @@ static int bond_fill_info(struct sk_buff *skb, bond->params.arp_all_targets)) goto nla_put_failure; + if (bond->primary_slave && + nla_put_u32(skb, IFLA_BOND_PRIMARY, + bond->primary_slave->dev->ifindex)) + goto nla_put_failure; + return 0; nla_put_failure: diff --git a/drivers/net/bonding/bond_options.c b/drivers/net/bonding/bond_options.c index 600779e5904f..c410d2d0dc33 100644 --- a/drivers/net/bonding/bond_options.c +++ b/drivers/net/bonding/bond_options.c @@ -467,3 +467,55 @@ int bond_option_arp_all_targets_set(struct bonding *bond, int arp_all_targets) return 0; } + +int bond_option_primary_set(struct bonding *bond, const char *primary) +{ + struct list_head *iter; + struct slave *slave; + int err = 0; + + block_netpoll_tx(); + read_lock(&bond->lock); + write_lock_bh(&bond->curr_slave_lock); + + if (!USES_PRIMARY(bond->params.mode)) { + pr_err("%s: Unable to set primary slave; %s is in mode %d\n", + bond->dev->name, bond->dev->name, bond->params.mode); + err = -EINVAL; + goto out; + } + + /* check to see if we are clearing primary */ + if (!strlen(primary)) { + pr_info("%s: Setting primary slave to None.\n", + bond->dev->name); + bond->primary_slave = NULL; + memset(bond->params.primary, 0, sizeof(bond->params.primary)); + bond_select_active_slave(bond); + goto out; + } + + bond_for_each_slave(bond, slave, iter) { + if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) { + pr_info("%s: Setting %s as primary slave.\n", + bond->dev->name, slave->dev->name); + bond->primary_slave = slave; + strcpy(bond->params.primary, slave->dev->name); + bond_select_active_slave(bond); + goto out; + } + } + + strncpy(bond->params.primary, primary, IFNAMSIZ); + bond->params.primary[IFNAMSIZ - 1] = 0; + + pr_info("%s: Recording %s as primary, but it has not been enslaved to %s yet.\n", + bond->dev->name, primary, bond->dev->name); + +out: + write_unlock_bh(&bond->curr_slave_lock); + read_unlock(&bond->lock); + unblock_netpoll_tx(); + + return err; +} diff --git a/drivers/net/bonding/bond_sysfs.c b/drivers/net/bonding/bond_sysfs.c index 6368d299d5a6..7304c2bd2285 100644 --- a/drivers/net/bonding/bond_sysfs.c +++ b/drivers/net/bonding/bond_sysfs.c @@ -871,56 +871,22 @@ static ssize_t bonding_store_primary(struct device *d, const char *buf, size_t count) { struct bonding *bond = to_bond(d); - struct list_head *iter; char ifname[IFNAMSIZ]; - struct slave *slave; - - if (!rtnl_trylock()) - return restart_syscall(); - block_netpoll_tx(); - write_lock_bh(&bond->curr_slave_lock); - - if (!USES_PRIMARY(bond->params.mode)) { - pr_info("%s: Unable to set primary slave; %s is in mode %d\n", - bond->dev->name, bond->dev->name, bond->params.mode); - goto out; - } + int ret; sscanf(buf, "%15s", ifname); /* IFNAMSIZ */ + if (ifname[0] == '\n') + ifname[0] = '\0'; - /* check to see if we are clearing primary */ - if (!strlen(ifname) || buf[0] == '\n') { - pr_info("%s: Setting primary slave to None.\n", - bond->dev->name); - bond->primary_slave = NULL; - memset(bond->params.primary, 0, sizeof(bond->params.primary)); - bond_select_active_slave(bond); - goto out; - } - - bond_for_each_slave(bond, slave, iter) { - if (strncmp(slave->dev->name, ifname, IFNAMSIZ) == 0) { - pr_info("%s: Setting %s as primary slave.\n", - bond->dev->name, slave->dev->name); - bond->primary_slave = slave; - strcpy(bond->params.primary, slave->dev->name); - bond_select_active_slave(bond); - goto out; - } - } + if (!rtnl_trylock()) + return restart_syscall(); - strncpy(bond->params.primary, ifname, IFNAMSIZ); - bond->params.primary[IFNAMSIZ - 1] = 0; + ret = bond_option_primary_set(bond, ifname); + if (!ret) + ret = count; - pr_info("%s: Recording %s as primary, " - "but it has not been enslaved to %s yet.\n", - bond->dev->name, ifname, bond->dev->name); -out: - write_unlock_bh(&bond->curr_slave_lock); - unblock_netpoll_tx(); rtnl_unlock(); - - return count; + return ret; } static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR, bonding_show_primary, bonding_store_primary); diff --git a/drivers/net/bonding/bonding.h b/drivers/net/bonding/bonding.h index 8f0d6d0c383b..ec35802cd265 100644 --- a/drivers/net/bonding/bonding.h +++ b/drivers/net/bonding/bonding.h @@ -454,6 +454,7 @@ int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target); int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target); int bond_option_arp_validate_set(struct bonding *bond, int arp_validate); int bond_option_arp_all_targets_set(struct bonding *bond, int arp_all_targets); +int bond_option_primary_set(struct bonding *bond, const char *primary); struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond); struct net_device *bond_option_active_slave_get(struct bonding *bond); diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h index a897b7e22541..fb3cfe2b176a 100644 --- a/include/uapi/linux/if_link.h +++ b/include/uapi/linux/if_link.h @@ -339,6 +339,7 @@ enum { IFLA_BOND_ARP_IP_TARGET, IFLA_BOND_ARP_VALIDATE, IFLA_BOND_ARP_ALL_TARGETS, + IFLA_BOND_PRIMARY, __IFLA_BOND_MAX, };