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nfsd: make NFSv4 recovery client tracking options per net

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Pointer to client tracking operations - client_tracking_ops - have to be
containerized, because different environment can support different trackers
(for example, legacy tracker currently is not suported in container).

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Stanislav Kinsbursky 2012-12-04 14:29:27 +03:00 committed by J. Bruce Fields
parent 9b2ef62b15
commit 9a9c6478a8
2 changed files with 30 additions and 20 deletions
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2
fs/nfsd/netns.h
View file

@ -35,6 +35,7 @@
#define SESSION_HASH_SIZE 512
struct cld_net;
struct nfsd4_client_tracking_ops;
struct nfsd_net {
struct cld_net *cld_net;
@ -87,6 +88,7 @@ struct nfsd_net {
struct file *rec_file;
bool in_grace;
struct nfsd4_client_tracking_ops *client_tracking_ops;
time_t nfsd4_lease;
time_t nfsd4_grace;

48
fs/nfsd/nfs4recover.c
View file

@ -63,7 +63,6 @@ struct nfsd4_client_tracking_ops {
/* Globals */
static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery";
static struct nfsd4_client_tracking_ops *client_tracking_ops;
static int
nfs4_save_creds(const struct cred **original_creds)
@ -1262,17 +1261,18 @@ nfsd4_client_tracking_init(struct net *net)
{
int status;
struct path path;
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
/* just run the init if it the method is already decided */
if (client_tracking_ops)
if (nn->client_tracking_ops)
goto do_init;
/*
* First, try a UMH upcall. It should succeed or fail quickly, so
* there's little harm in trying that first.
*/
client_tracking_ops = &nfsd4_umh_tracking_ops;
status = client_tracking_ops->init(net);
nn->client_tracking_ops = &nfsd4_umh_tracking_ops;
status = nn->client_tracking_ops->init(net);
if (!status)
return status;
@ -1280,7 +1280,7 @@ nfsd4_client_tracking_init(struct net *net)
* See if the recoverydir exists and is a directory. If it is,
* then use the legacy ops.
*/
client_tracking_ops = &nfsd4_legacy_tracking_ops;
nn->client_tracking_ops = &nfsd4_legacy_tracking_ops;
status = kern_path(nfs4_recoverydir(), LOOKUP_FOLLOW, &path);
if (!status) {
status = S_ISDIR(path.dentry->d_inode->i_mode);
@ -1290,16 +1290,16 @@ nfsd4_client_tracking_init(struct net *net)
}
/* Finally, try to use nfsdcld */
client_tracking_ops = &nfsd4_cld_tracking_ops;
nn->client_tracking_ops = &nfsd4_cld_tracking_ops;
printk(KERN_WARNING "NFSD: the nfsdcld client tracking upcall will be "
"removed in 3.10. Please transition to using "
"nfsdcltrack.\n");
do_init:
status = client_tracking_ops->init(net);
status = nn->client_tracking_ops->init(net);
if (status) {
printk(KERN_WARNING "NFSD: Unable to initialize client "
"recovery tracking! (%d)\n", status);
client_tracking_ops = NULL;
nn->client_tracking_ops = NULL;
}
return status;
}
@ -1307,32 +1307,40 @@ do_init:
void
nfsd4_client_tracking_exit(struct net *net)
{
if (client_tracking_ops) {
if (client_tracking_ops->exit)
client_tracking_ops->exit(net);
client_tracking_ops = NULL;
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
if (nn->client_tracking_ops) {
if (nn->client_tracking_ops->exit)
nn->client_tracking_ops->exit(net);
nn->client_tracking_ops = NULL;
}
}
void
nfsd4_client_record_create(struct nfs4_client *clp)
{
if (client_tracking_ops)
client_tracking_ops->create(clp);
struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
if (nn->client_tracking_ops)
nn->client_tracking_ops->create(clp);
}
void
nfsd4_client_record_remove(struct nfs4_client *clp)
{
if (client_tracking_ops)
client_tracking_ops->remove(clp);
struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
if (nn->client_tracking_ops)
nn->client_tracking_ops->remove(clp);
}
int
nfsd4_client_record_check(struct nfs4_client *clp)
{
if (client_tracking_ops)
return client_tracking_ops->check(clp);
struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
if (nn->client_tracking_ops)
return nn->client_tracking_ops->check(clp);
return -EOPNOTSUPP;
}
@ -1340,8 +1348,8 @@ nfsd4_client_record_check(struct nfs4_client *clp)
void
nfsd4_record_grace_done(struct nfsd_net *nn, time_t boot_time)
{
if (client_tracking_ops)
client_tracking_ops->grace_done(nn, boot_time);
if (nn->client_tracking_ops)
nn->client_tracking_ops->grace_done(nn, boot_time);
}
static int