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NFS: DNS resolver cache per network namespace context introduced

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This patch implements DNS resolver cache creation and registration for each
alive network namespace context.
This was done by registering NFS per-net operations, responsible for DNS cache
allocation/register and unregister/destructioning instead of initialization and
destruction of static "nfs_dns_resolve" cache detail (this one was removed).
Pointer to network dns resolver cache is stored in new per-net "nfs_net"
structure.
This patch also changes nfs_dns_resolve_name() function prototype (and it's
calls) by adding network pointer parameter, which is used to get proper DNS
resolver cache pointer for do_cache_lookup_wait() call.

Note: empty nfs_dns_resolver_init() and nfs_dns_resolver_destroy() functions
will be used in next patch in the series.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Stanislav Kinsbursky 2011-11-25 17:13:04 +03:00 • committed by Trond Myklebust
parent 5c1cacb175
commit 1b340d0118
5 changed files with 123 additions and 41 deletions
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14
fs/nfs/dns_resolve.h
View file

@ -15,12 +15,22 @@ static inline int nfs_dns_resolver_init(void)
static inline void nfs_dns_resolver_destroy(void)
{}
static inline int nfs_dns_resolver_cache_init(struct net *net)
{
return 0;
}
static inline void nfs_dns_resolver_cache_destroy(struct net *net)
{}
#else
extern int nfs_dns_resolver_init(void);
extern void nfs_dns_resolver_destroy(void);
extern int nfs_dns_resolver_cache_init(struct net *net);
extern void nfs_dns_resolver_cache_destroy(struct net *net);
#endif
extern ssize_t nfs_dns_resolve_name(char *name, size_t namelen,
struct sockaddr *sa, size_t salen);
extern ssize_t nfs_dns_resolve_name(struct net *net, char *name,
size_t namelen, struct sockaddr *sa, size_t salen);
#endif