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bonding: add helper function bond_get_targets_ip(targets, ip) 

Add function bond_get_targets_ip(targets, ip) which searches through
targets array of ips (arp_targets) and returns the position of first
match. If ip == 0, returns the first free slot. On failure to find the
ip or free slot, return -1.

Use it to verify if the arp we've received is valid and in sysfs.

v1->v2:
Fix "[2/6] bonding: add helper function bond_get_targets_ip(targets, ip)",
per Nikolay's advice, to verify if source ip != 0.0.0.0, otherwise we might
update 'null' arp_ip_targets' last_rx. Also, address style.

Signed-off-by: Veaceslav Falico <vfalico@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Veaceslav Falico 2013-06-24 11:49:29 +02:00 committed by David S. Miller
parent 277e2a84c1
commit 87a7b84b58
3 changed files with 52 additions and 51 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
drivers/net/bonding/bond_main.c
View File

@ -2610,19 +2610,16 @@ static void bond_arp_send_all(struct bonding *bond, struct slave *slave)
static void bond_validate_arp(struct bonding *bond, struct slave *slave, __be32 sip, __be32 tip)
{
int i;
__be32 *targets = bond->params.arp_targets;
for (i = 0; (i < BOND_MAX_ARP_TARGETS) && targets[i]; i++) {
pr_debug("bva: sip %pI4 tip %pI4 t[%d] %pI4 bhti(tip) %d\n",
&sip, &tip, i, &targets[i],
bond_has_this_ip(bond, tip));
if (sip == targets[i]) {
if (bond_has_this_ip(bond, tip))
slave->last_arp_rx = jiffies;
return;
}
if (!sip || !bond_has_this_ip(bond, tip)) {
pr_debug("bva: sip %pI4 tip %pI4 not found\n", &sip, &tip);
return;
}
if (bond_get_targets_ip(bond->params.arp_targets, sip) == -1) {
pr_debug("bva: sip %pI4 not found in targets\n", &sip);
return;
}
slave->last_arp_rx = jiffies;
}
static int bond_arp_rcv(const struct sk_buff *skb, struct bonding *bond,
@ -4839,7 +4836,7 @@ static int __net_init bond_net_init(struct net *net)
bond_create_proc_dir(bn);
bond_create_sysfs(bn);
return 0;
}

64
drivers/net/bonding/bond_sysfs.c
View File

@ -591,7 +591,7 @@ static ssize_t bonding_store_arp_targets(struct device *d,
const char *buf, size_t count)
{
__be32 newtarget;
int i = 0, done = 0, ret = count;
int i = 0, ret = -EINVAL;
struct bonding *bond = to_bond(d);
__be32 *targets;
@ -602,57 +602,44 @@ static ssize_t bonding_store_arp_targets(struct device *d,
if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
pr_err("%s: invalid ARP target %pI4 specified for addition\n",
bond->dev->name, &newtarget);
ret = -EINVAL;
goto out;
}
/* look for an empty slot to put the target in, and check for dupes */
for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
if (targets[i] == newtarget) { /* duplicate */
pr_err("%s: ARP target %pI4 is already present\n",
bond->dev->name, &newtarget);
ret = -EINVAL;
goto out;
}
if (targets[i] == 0) {
pr_info("%s: adding ARP target %pI4.\n",
bond->dev->name, &newtarget);
done = 1;
targets[i] = newtarget;
}
}
if (!done) {
pr_err("%s: ARP target table is full!\n",
bond->dev->name);
ret = -EINVAL;
goto out;
}
if (bond_get_targets_ip(targets, newtarget) != -1) { /* dup */
pr_err("%s: ARP target %pI4 is already present\n",
bond->dev->name, &newtarget);
goto out;
}
i = bond_get_targets_ip(targets, 0); /* first free slot */
if (i == -1) {
pr_err("%s: ARP target table is full!\n",
bond->dev->name);
goto out;
}
pr_info("%s: adding ARP target %pI4.\n", bond->dev->name,
&newtarget);
targets[i] = newtarget;
} else if (buf[0] == '-') {
if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
pr_err("%s: invalid ARP target %pI4 specified for removal\n",
bond->dev->name, &newtarget);
ret = -EINVAL;
goto out;
}
for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
if (targets[i] == newtarget) {
int j;
pr_info("%s: removing ARP target %pI4.\n",
bond->dev->name, &newtarget);
for (j = i; (j < (BOND_MAX_ARP_TARGETS-1)) && targets[j+1]; j++)
targets[j] = targets[j+1];
targets[j] = 0;
done = 1;
}
}
if (!done) {
i = bond_get_targets_ip(targets, newtarget);
if (i == -1) {
pr_info("%s: unable to remove nonexistent ARP target %pI4.\n",
bond->dev->name, &newtarget);
ret = -EINVAL;
goto out;
}
pr_info("%s: removing ARP target %pI4.\n", bond->dev->name,
&newtarget);
for (; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
targets[i] = targets[i+1];
targets[i] = 0;
} else {
pr_err("no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
bond->dev->name);
@ -660,6 +647,7 @@ static ssize_t bonding_store_arp_targets(struct device *d,
goto out;
}
ret = count;
out:
return ret;
}

16
drivers/net/bonding/bonding.h
View File

@ -464,6 +464,22 @@ static inline struct slave *bond_slave_has_mac(struct bonding *bond,
return NULL;
}
/* Check if the ip is present in arp ip list, or first free slot if ip == 0
* Returns -1 if not found, index if found
*/
static inline int bond_get_targets_ip(__be32 *targets, __be32 ip)
{
int i;
for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
if (targets[i] == ip)
return i;
else if (targets[i] == 0)
break;
return -1;
}
/* exported from bond_main.c */
extern int bond_net_id;
extern const struct bond_parm_tbl bond_lacp_tbl[];