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nfsd: make expkey cache allocated per network namespace context 

This patch also changes svcauth_unix_purge() function: added network namespace
as a parameter and thus loop over all networks was replaced by only one call
for ip map cache purge.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Stanislav Kinsbursky 2012-04-11 15:13:28 +04:00 committed by J. Bruce Fields
parent b3853e0ea1
commit e5f06f720e
6 changed files with 25 additions and 24 deletions
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28
fs/nfsd/export.c
View File

@ -40,7 +40,6 @@ typedef struct svc_export svc_export;
#define EXPKEY_HASHBITS 8
#define EXPKEY_HASHMAX (1 << EXPKEY_HASHBITS)
#define EXPKEY_HASHMASK (EXPKEY_HASHMAX -1)
static struct cache_head *expkey_table[EXPKEY_HASHMAX];
static void expkey_put(struct kref *ref)
{
@ -241,10 +240,9 @@ static struct cache_head *expkey_alloc(void)
return NULL;
}
static struct cache_detail svc_expkey_cache = {
static struct cache_detail svc_expkey_cache_template = {
.owner = THIS_MODULE,
.hash_size = EXPKEY_HASHMAX,
.hash_table = expkey_table,
.name = "nfsd.fh",
.cache_put = expkey_put,
.cache_upcall = expkey_upcall,
@ -883,12 +881,13 @@ static struct svc_export *exp_find(struct cache_detail *cd,
u32 *fsidv, struct cache_req *reqp)
{
struct svc_export *exp;
struct svc_expkey *ek = exp_find_key(&svc_expkey_cache, clp, fsid_type, fsidv, reqp);
struct nfsd_net *nn = net_generic(cd->net, nfsd_net_id);
struct svc_expkey *ek = exp_find_key(nn->svc_expkey_cache, clp, fsid_type, fsidv, reqp);
if (IS_ERR(ek))
return ERR_CAST(ek);
exp = exp_get_by_name(cd, clp, &ek->ek_path, reqp);
cache_put(&ek->h, &svc_expkey_cache);
cache_put(&ek->h, nn->svc_expkey_cache);
if (IS_ERR(exp))
return ERR_CAST(exp);
@ -1232,7 +1231,6 @@ const struct seq_operations nfs_exports_op = {
.show = e_show,
};
/*
* Initialize the exports module.
*/
@ -1251,11 +1249,18 @@ nfsd_export_init(struct net *net)
if (rv)
goto destroy_export_cache;
rv = cache_register_net(&svc_expkey_cache, net);
if (rv)
nn->svc_expkey_cache = cache_create_net(&svc_expkey_cache_template, net);
if (IS_ERR(nn->svc_expkey_cache)) {
rv = PTR_ERR(nn->svc_expkey_cache);
goto unregister_export_cache;
}
rv = cache_register_net(nn->svc_expkey_cache, net);
if (rv)
goto destroy_expkey_cache;
return 0;
destroy_expkey_cache:
cache_destroy_net(nn->svc_expkey_cache, net);
unregister_export_cache:
cache_unregister_net(nn->svc_export_cache, net);
destroy_export_cache:
@ -1271,7 +1276,7 @@ nfsd_export_flush(struct net *net)
{
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
cache_purge(&svc_expkey_cache);
cache_purge(nn->svc_expkey_cache);
cache_purge(nn->svc_export_cache);
}
@ -1285,10 +1290,11 @@ nfsd_export_shutdown(struct net *net)
dprintk("nfsd: shutting down export module (net: %p).\n", net);
cache_unregister_net(&svc_expkey_cache, net);
cache_unregister_net(nn->svc_expkey_cache, net);
cache_unregister_net(nn->svc_export_cache, net);
cache_destroy_net(nn->svc_expkey_cache, net);
cache_destroy_net(nn->svc_export_cache, net);
svcauth_unix_purge();
svcauth_unix_purge(net);
dprintk("nfsd: export shutdown complete (net: %p).\n", net);
}

1
fs/nfsd/netns.h
View File

@ -29,6 +29,7 @@ struct cld_net;
struct nfsd_net {
struct cld_net *cld_net;
struct cache_detail *svc_expkey_cache;
struct cache_detail *svc_export_cache;
};

3
fs/nfsd/nfsctl.c
View File

@ -129,13 +129,14 @@ static int exports_open(struct inode *inode, struct file *file)
{
int err;
struct seq_file *seq;
struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id);
err = seq_open(file, &nfs_exports_op);
if (err)
return err;
seq = file->private_data;
seq->private = &svc_export_cache;
seq->private = nn->svc_export_cache;
return 0;
}

2
include/linux/nfsd/export.h
View File

@ -143,8 +143,6 @@ int exp_rootfh(struct net *, struct auth_domain *,
__be32 exp_pseudoroot(struct svc_rqst *, struct svc_fh *);
__be32 nfserrno(int errno);
extern struct cache_detail svc_export_cache;
static inline void exp_put(struct svc_export *exp)
{
cache_put(&exp->h, exp->cd);

2
include/linux/sunrpc/svcauth.h
View File

@ -130,7 +130,7 @@ extern struct auth_domain *auth_domain_lookup(char *name, struct auth_domain *ne
extern struct auth_domain *auth_domain_find(char *name);
extern struct auth_domain *auth_unix_lookup(struct net *net, struct in6_addr *addr);
extern int auth_unix_forget_old(struct auth_domain *dom);
extern void svcauth_unix_purge(void);
extern void svcauth_unix_purge(struct net *net);
extern void svcauth_unix_info_release(struct svc_xprt *xpt);
extern int svcauth_unix_set_client(struct svc_rqst *rqstp);

13
net/sunrpc/svcauth_unix.c
View File

@ -346,17 +346,12 @@ static inline int ip_map_update(struct net *net, struct ip_map *ipm,
return __ip_map_update(sn->ip_map_cache, ipm, udom, expiry);
}
void svcauth_unix_purge(void)
void svcauth_unix_purge(struct net *net)
{
struct net *net;
struct sunrpc_net *sn;
for_each_net(net) {
struct sunrpc_net *sn;
sn = net_generic(net, sunrpc_net_id);
cache_purge(sn->ip_map_cache);
}
sn = net_generic(net, sunrpc_net_id);
cache_purge(sn->ip_map_cache);
}
EXPORT_SYMBOL_GPL(svcauth_unix_purge);