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bonding: Implement user key part of port_key in an AD system.

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The port key has three components - user-key, speed-part, and duplex-part.
The LSBit is for the duplex-part, next 5 bits are for the speed while the
remaining 10 bits are the user defined key bits. Get these 10 bits
from the user-space (through the SysFs interface) and use it to form the
admin port-key. Allowed range for the user-key is 0 - 1023 (10 bits). If
it is not provided then use zero for the user-key-bits (default).

It can set using following example code -

   # modprobe bonding mode=4
   # usr_port_key=$(( RANDOM & 0x3FF ))
   # echo $usr_port_key > /sys/class/net/bond0/bonding/ad_user_port_key
   # echo +eth1 > /sys/class/net/bond0/bonding/slaves
   ...
   # ip link set bond0 up

Signed-off-by: Mahesh Bandewar <maheshb@google.com>
Reviewed-by: Nikolay Aleksandrov <nikolay@redhat.com>
[jt: * fixed up style issues reported by checkpatch
     * fixed up context from change in ad_actor_sys_prio patch]
Signed-off-by: Jonathan Toppins <jtoppins@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Mahesh Bandewar
2015-05-09 00:01:57 -07:00
committed by David S. Miller
parent 7451495755
commit d22a5fc0c3
7 changed files with 123 additions and 7 deletions
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10
drivers/net/bonding/bond_main.c
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@@ -4141,6 +4141,7 @@ static int bond_check_params(struct bond_params *params)
const struct bond_opt_value *valptr;
int arp_all_targets_value;
u16 ad_actor_sys_prio = 0;
u16 ad_user_port_key = 0;
/* Convert string parameters. */
if (mode) {
@@ -4445,6 +4446,14 @@ static int bond_check_params(struct bond_params *params)
}
ad_actor_sys_prio = valptr->value;
valptr = bond_opt_parse(bond_opt_get(BOND_OPT_AD_USER_PORT_KEY),
&newval);
if (!valptr) {
pr_err("Error: No ad_user_port_key default value");
return -EINVAL;
}
ad_user_port_key = valptr->value;
if (lp_interval == 0) {
pr_warn("Warning: ip_interval must be between 1 and %d, so it was reset to %d\n",
INT_MAX, BOND_ALB_DEFAULT_LP_INTERVAL);
@@ -4475,6 +4484,7 @@ static int bond_check_params(struct bond_params *params)
params->tlb_dynamic_lb = 1; /* Default value */
params->ad_actor_sys_prio = ad_actor_sys_prio;
eth_zero_addr(params->ad_actor_system);
params->ad_user_port_key = ad_user_port_key;
if (packets_per_slave > 0) {
params->reciprocal_packets_per_slave =
reciprocal_value(packets_per_slave);