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nfsd: Containerise filecache laundrette

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Ensure that if the filecache laundrette gets stuck, it only affects
the knfsd instances of one container.

The notifier callbacks can be called from various contexts so avoid
using synchonous filesystem operations that might deadlock.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Trond Myklebust
2020-01-06 13:18:05 -05:00
committed by J. Bruce Fields
parent 36ebbdb96b
commit 9542e6a643
3 changed files with 207 additions and 42 deletions
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9
fs/nfsd/nfssvc.c
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@@ -400,13 +400,18 @@ static int nfsd_startup_net(int nrservs, struct net *net, const struct cred *cre
nn->lockd_up = true;
}
ret = nfs4_state_start_net(net);
ret = nfsd_file_cache_start_net(net);
if (ret)
goto out_lockd;
ret = nfs4_state_start_net(net);
if (ret)
goto out_filecache;
nn->nfsd_net_up = true;
return 0;
out_filecache:
nfsd_file_cache_shutdown_net(net);
out_lockd:
if (nn->lockd_up) {
lockd_down(net);
@@ -421,7 +426,7 @@ static void nfsd_shutdown_net(struct net *net)
{
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
nfsd_file_cache_purge(net);
nfsd_file_cache_shutdown_net(net);
nfs4_state_shutdown_net(net);
if (nn->lockd_up) {
lockd_down(net);