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iscsi_ibft: Add prefix-len attr and display netmask

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The iBFT table only specifies a prefix length, not a netmask.
And the netmask is pretty much pointless for IPv6.
So introduce a new attribute 'prefix-len'.

Some older user-space code might rely on the netmask attribute
being present, so we should always display it.

Changes from v1:
 - Combined two patches into one

Changes from v2:
 - Cleaned up/corrected wording for patch description

Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Lee Duncan <lduncan@suse.com>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: Konrad Rzeszutek Wilk <konrad@kernel.org>
This commit is contained in:
Hannes Reinecke
2016-02-25 09:56:04 -08:00
committed by Konrad Rzeszutek Wilk
parent 18558cae02
commit 9a99425f07
3 changed files with 10 additions and 0 deletions
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4
drivers/firmware/iscsi_ibft.c
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@@ -319,6 +319,9 @@ static ssize_t ibft_attr_show_nic(void *data, int type, char *buf)
val = cpu_to_be32(~((1 << (32-nic->subnet_mask_prefix))-1));
str += sprintf(str, "%pI4", &val);
break;
case ISCSI_BOOT_ETH_PREFIX_LEN:
str += sprintf(str, "%d\n", nic->subnet_mask_prefix);
break;
case ISCSI_BOOT_ETH_ORIGIN:
str += sprintf(str, "%d\n", nic->origin);
break;
@@ -460,6 +463,7 @@ static umode_t ibft_check_nic_for(void *data, int type)
if (address_not_null(nic->ip_addr))
rc = S_IRUGO;
break;
case ISCSI_BOOT_ETH_PREFIX_LEN:
case ISCSI_BOOT_ETH_SUBNET_MASK:
if (nic->subnet_mask_prefix)
rc = S_IRUGO;