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authorChristoph Hellwig <hch@lst.de>2020-05-28 07:12:33 +0200
committerDavid S. Miller <davem@davemloft.net>2020-05-28 11:11:46 -0700
commit18d5ad62327576cbb1e5b9938a59d63ac0c15832 (patch)
treebbe7e26b179b2198e8dcce03c59554851e180b87 /net/ipv6
parentfce934949c0f0003c1777fbf8c0706ba82a8cf7e (diff)
downloadlinux-18d5ad62327576cbb1e5b9938a59d63ac0c15832.tar.bz2
ipv6: add ip6_sock_set_addr_preferences
Add a helper to directly set the IPV6_ADD_PREFERENCES sockopt from kernel space without going through a fake uaccess. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6')
-rw-r--r--net/ipv6/ipv6_sockglue.c59
1 files changed, 1 insertions, 58 deletions
diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index e10258c2210e..adbfed6adf11 100644
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -845,67 +845,10 @@ done:
break;
case IPV6_ADDR_PREFERENCES:
- {
- unsigned int pref = 0;
- unsigned int prefmask = ~0;
-
if (optlen < sizeof(int))
goto e_inval;
-
- retv = -EINVAL;
-
- /* check PUBLIC/TMP/PUBTMP_DEFAULT conflicts */
- switch (val & (IPV6_PREFER_SRC_PUBLIC|
- IPV6_PREFER_SRC_TMP|
- IPV6_PREFER_SRC_PUBTMP_DEFAULT)) {
- case IPV6_PREFER_SRC_PUBLIC:
- pref |= IPV6_PREFER_SRC_PUBLIC;
- break;
- case IPV6_PREFER_SRC_TMP:
- pref |= IPV6_PREFER_SRC_TMP;
- break;
- case IPV6_PREFER_SRC_PUBTMP_DEFAULT:
- break;
- case 0:
- goto pref_skip_pubtmp;
- default:
- goto e_inval;
- }
-
- prefmask &= ~(IPV6_PREFER_SRC_PUBLIC|
- IPV6_PREFER_SRC_TMP);
-pref_skip_pubtmp:
-
- /* check HOME/COA conflicts */
- switch (val & (IPV6_PREFER_SRC_HOME|IPV6_PREFER_SRC_COA)) {
- case IPV6_PREFER_SRC_HOME:
- break;
- case IPV6_PREFER_SRC_COA:
- pref |= IPV6_PREFER_SRC_COA;
- case 0:
- goto pref_skip_coa;
- default:
- goto e_inval;
- }
-
- prefmask &= ~IPV6_PREFER_SRC_COA;
-pref_skip_coa:
-
- /* check CGA/NONCGA conflicts */
- switch (val & (IPV6_PREFER_SRC_CGA|IPV6_PREFER_SRC_NONCGA)) {
- case IPV6_PREFER_SRC_CGA:
- case IPV6_PREFER_SRC_NONCGA:
- case 0:
- break;
- default:
- goto e_inval;
- }
-
- np->srcprefs = (np->srcprefs & prefmask) | pref;
- retv = 0;
-
+ retv = __ip6_sock_set_addr_preferences(sk, val);
break;
- }
case IPV6_MINHOPCOUNT:
if (optlen < sizeof(int))
goto e_inval;