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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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3
fs/lockd/clntlock.c
View File

@ -166,7 +166,8 @@ __be32 nlmclnt_grant(const struct sockaddr_in *addr, const struct nlm_lock *lock
*/
if (fl_blocked->fl_u.nfs_fl.owner->pid != lock->svid)
continue;
if (!nlm_cmp_addr(nlm_addr_in(block->b_host), addr))
if (!nlm_cmp_addr(nlm_addr(block->b_host),
(struct sockaddr *)addr))
continue;
if (nfs_compare_fh(NFS_FH(fl_blocked->fl_file->f_path.dentry->d_inode) ,fh) != 0)
continue;

6
fs/lockd/host.c
View File

@ -116,7 +116,7 @@ static struct nlm_host *nlm_lookup_host(int server,
*/
chain = &nlm_hosts[hash];
hlist_for_each_entry(host, pos, chain, h_hash) {
if (!nlm_cmp_addr(nlm_addr_in(host), sin))
if (!nlm_cmp_addr(nlm_addr(host), (struct sockaddr *)sin))
continue;
/* See if we have an NSM handle for this client */
@ -129,7 +129,7 @@ static struct nlm_host *nlm_lookup_host(int server,
continue;
if (host->h_server != server)
continue;
if (!nlm_cmp_addr(nlm_srcaddr_in(host), ssin))
if (!nlm_cmp_addr(nlm_srcaddr(host), (struct sockaddr *)ssin))
continue;
/* Move to head of hash chain. */
@ -551,7 +551,7 @@ __nsm_find(const struct sockaddr_in *sin,
if (strlen(pos->sm_name) != hostname_len
|| memcmp(pos->sm_name, hostname, hostname_len))
continue;
} else if (!nlm_cmp_addr(nsm_addr_in(pos), sin))
} else if (!nlm_cmp_addr(nsm_addr(pos), (struct sockaddr *)sin))
continue;
atomic_inc(&pos->sm_count);
kfree(nsm);

2
fs/lockd/svcsubs.c
View File

@ -418,7 +418,7 @@ EXPORT_SYMBOL_GPL(nlmsvc_unlock_all_by_sb);
static int
nlmsvc_match_ip(void *datap, struct nlm_host *host)
{
return nlm_cmp_addr(nlm_srcaddr_in(host), datap);
return nlm_cmp_addr(nlm_srcaddr(host), datap);
}
/**

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.