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lockd: Teach nlm_cmp_addr() to support AF_INET6 addresses

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Update the nlm_cmp_addr() helper to support AF_INET6 as well as AF_INET
addresses.  New version takes two "struct sockaddr *" arguments instead of
"struct sockaddr_in *" arguments.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
This commit is contained in:
Chuck Lever 2008-09-03 14:36:01 -04:00 • committed by J. Bruce Fields
parent 7e9d7746bf
commit 781b61a6f4
4 changed files with 39 additions and 10 deletions
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38
include/linux/lockd/lockd.h
View file

@ -12,6 +12,8 @@
#ifdef __KERNEL__
#include <linux/in.h>
#include <linux/in6.h>
#include <net/ipv6.h>
#include <linux/fs.h>
#include <linux/kref.h>
#include <linux/utsname.h>
@ -272,15 +274,41 @@ static inline struct inode *nlmsvc_file_inode(struct nlm_file *file)
return file->f_file->f_path.dentry->d_inode;
}
/*
* Compare two host addresses (needs modifying for ipv6)
*/
static inline int nlm_cmp_addr(const struct sockaddr_in *sin1,
const struct sockaddr_in *sin2)
static inline int __nlm_cmp_addr4(const struct sockaddr *sap1,
const struct sockaddr *sap2)
{
const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sap1;
const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sap2;
return sin1->sin_addr.s_addr == sin2->sin_addr.s_addr;
}
static inline int __nlm_cmp_addr6(const struct sockaddr *sap1,
const struct sockaddr *sap2)
{
const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sap1;
const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sap2;
return ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr);
}
/*
* Compare two host addresses
*
* Return TRUE if the addresses are the same; otherwise FALSE.
*/
static inline int nlm_cmp_addr(const struct sockaddr *sap1,
const struct sockaddr *sap2)
{
if (sap1->sa_family == sap2->sa_family) {
switch (sap1->sa_family) {
case AF_INET:
return __nlm_cmp_addr4(sap1, sap2);
case AF_INET6:
return __nlm_cmp_addr6(sap1, sap2);
}
}
return 0;
}
/*
* Compare two NLM locks.
* When the second lock is of type F_UNLCK, this acts like a wildcard.