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| author | Scott Mayhew <smayhew@redhat.com> | 2020-02-19 15:52:15 -0500 |
|---|---|---|
| committer | Chuck Lever <chuck.lever@oracle.com> | 2020-03-16 12:04:30 -0400 |
| commit | 7627d7dc79a8edd4b8f946a66002ea4205203112 (patch) | |
| tree | ada1890d3a593920ca589e8f5c5fd6836a66fc60 /fs/nfsd | |
| parent | fb33c6510d5595144d585aa194d377cf74d31911 (diff) | |
| download | linux-7627d7dc79a8edd4b8f946a66002ea4205203112.tar.gz | |
nfsd: set the server_scope during service startup
Currently, nfsd4_encode_exchange_id() encodes the utsname nodename string in the server_scope field. In a multi-host container environemnt, if an nfsd container is restarted on a different host than it was originally running on, clients will see a server_scope mismatch and will not attempt to reclaim opens. Instead, set the server_scope while we're in a process context during service startup, so we get the utsname nodename of the current process and store that in nfsd_net. Signed-off-by: Scott Mayhew <smayhew@redhat.com> [bfields: fix up major_id too] Signed-off-by: J. Bruce Fields <bfields@redhat.com> Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Diffstat (limited to 'fs/nfsd')
| -rw-r--r-- | fs/nfsd/netns.h | 2 | ||||
| -rw-r--r-- | fs/nfsd/nfs4xdr.c | 9 | ||||
| -rw-r--r-- | fs/nfsd/nfssvc.c | 3 |
3 files changed, 10 insertions, 4 deletions
diff --git a/fs/nfsd/netns.h b/fs/nfsd/netns.h index 2baf32311e00..09aa545825bd 100644 --- a/fs/nfsd/netns.h +++ b/fs/nfsd/netns.h @@ -172,6 +172,8 @@ struct nfsd_net { unsigned int longest_chain_cachesize; struct shrinker nfsd_reply_cache_shrinker; + /* utsname taken from the the process that starts the server */ + char nfsd_name[UNX_MAXNODENAME+1]; }; /* Simple check to find out if a given net was properly initialized */ diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c index 9761512674a0..ad38aed6f5c2 100644 --- a/fs/nfsd/nfs4xdr.c +++ b/fs/nfsd/nfs4xdr.c @@ -4005,11 +4005,12 @@ nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr, int major_id_sz; int server_scope_sz; uint64_t minor_id = 0; + struct nfsd_net *nn = net_generic(SVC_NET(resp->rqstp), nfsd_net_id); - major_id = utsname()->nodename; - major_id_sz = strlen(major_id); - server_scope = utsname()->nodename; - server_scope_sz = strlen(server_scope); + major_id = nn->nfsd_name; + major_id_sz = strlen(nn->nfsd_name); + server_scope = nn->nfsd_name; + server_scope_sz = strlen(nn->nfsd_name); p = xdr_reserve_space(xdr, 8 /* eir_clientid */ + diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c index 3b77b904212d..ca9fd348548b 100644 --- a/fs/nfsd/nfssvc.c +++ b/fs/nfsd/nfssvc.c @@ -749,6 +749,9 @@ nfsd_svc(int nrservs, struct net *net, const struct cred *cred) if (nrservs == 0 && nn->nfsd_serv == NULL) goto out; + strlcpy(nn->nfsd_name, utsname()->nodename, + sizeof(nn->nfsd_name)); + error = nfsd_create_serv(net); if (error) goto out; |