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afs: Sort address lists so that they are in logical ascending order

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Sort address lists so that they are in logical ascending order rather than
being partially in ascending order of the BE representations of those
values.

Signed-off-by: David Howells <dhowells@redhat.com>
This commit is contained in:
David Howells 2018-10-04 09:32:28 +01:00
parent 4c19bbdc7f
commit 66be646bd9
1 changed files with 24 additions and 27 deletions
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51
fs/afs/addr_list.c
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@ -232,22 +232,23 @@ struct afs_addr_list *afs_dns_query(struct afs_cell *cell, time64_t *_expiry)
*/
void afs_merge_fs_addr4(struct afs_addr_list *alist, __be32 xdr, u16 port)
{
struct sockaddr_in6 *a;
__be16 xport = htons(port);
struct sockaddr_in6 *p;
u32 addr = ntohl(xdr);
int i;
if (alist->nr_addrs >= alist->max_addrs)
return;
for (i = 0; i < alist->nr_ipv4; i++) {
a = &alist->addrs[i].transport.sin6;
if (xdr == a->sin6_addr.s6_addr32[3] &&
xport == a->sin6_port)
struct sockaddr_in6 *a = &alist->addrs[i].transport.sin6;
u32 a_addr = ntohl(a->sin6_addr.s6_addr32[3]);
u16 a_port = ntohs(a->sin6_port);
if (addr == a_addr && port == a_port)
return;
if (xdr == a->sin6_addr.s6_addr32[3] &&
(u16 __force)xport < (u16 __force)a->sin6_port)
if (addr == a_addr && port < a_port)
break;
if ((u32 __force)xdr < (u32 __force)a->sin6_addr.s6_addr32[3])
if (addr < a_addr)
break;
}
@ -256,12 +257,12 @@ void afs_merge_fs_addr4(struct afs_addr_list *alist, __be32 xdr, u16 port)
alist->addrs + i,
sizeof(alist->addrs[0]) * (alist->nr_addrs - i));
a = &alist->addrs[i].transport.sin6;
a->sin6_port = xport;
a->sin6_addr.s6_addr32[0] = 0;
a->sin6_addr.s6_addr32[1] = 0;
a->sin6_addr.s6_addr32[2] = htonl(0xffff);
a->sin6_addr.s6_addr32[3] = xdr;
p = &alist->addrs[i].transport.sin6;
p->sin6_port = htons(port);
p->sin6_addr.s6_addr32[0] = 0;
p->sin6_addr.s6_addr32[1] = 0;
p->sin6_addr.s6_addr32[2] = htonl(0xffff);
p->sin6_addr.s6_addr32[3] = xdr;
alist->nr_ipv4++;
alist->nr_addrs++;
}
@ -271,21 +272,20 @@ void afs_merge_fs_addr4(struct afs_addr_list *alist, __be32 xdr, u16 port)
*/
void afs_merge_fs_addr6(struct afs_addr_list *alist, __be32 *xdr, u16 port)
{
struct sockaddr_in6 *a;
__be16 xport = htons(port);
struct sockaddr_in6 *p;
int i, diff;
if (alist->nr_addrs >= alist->max_addrs)
return;
for (i = alist->nr_ipv4; i < alist->nr_addrs; i++) {
a = &alist->addrs[i].transport.sin6;
struct sockaddr_in6 *a = &alist->addrs[i].transport.sin6;
u16 a_port = ntohs(a->sin6_port);
diff = memcmp(xdr, &a->sin6_addr, 16);
if (diff == 0 &&
xport == a->sin6_port)
if (diff == 0 && port == a_port)
return;
if (diff == 0 &&
(u16 __force)xport < (u16 __force)a->sin6_port)
if (diff == 0 && port < a_port)
break;
if (diff < 0)
break;
@ -296,12 +296,9 @@ void afs_merge_fs_addr6(struct afs_addr_list *alist, __be32 *xdr, u16 port)
alist->addrs + i,
sizeof(alist->addrs[0]) * (alist->nr_addrs - i));
a = &alist->addrs[i].transport.sin6;
a->sin6_port = xport;
a->sin6_addr.s6_addr32[0] = xdr[0];
a->sin6_addr.s6_addr32[1] = xdr[1];
a->sin6_addr.s6_addr32[2] = xdr[2];
a->sin6_addr.s6_addr32[3] = xdr[3];
p = &alist->addrs[i].transport.sin6;
p->sin6_port = htons(port);
memcpy(&p->sin6_addr, xdr, 16);
alist->nr_addrs++;
}