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| author | Trond Myklebust <trond.myklebust@hammerspace.com> | 2019-10-17 11:13:54 -0400 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@hammerspace.com> | 2019-11-03 21:28:45 -0500 |
| commit | e6237b6feb37582fbd6bd7a8336d1256a6b4b4f9 (patch) | |
| tree | e58abfc21a4940c9191f9772605d7cf9c4c991e9 /fs/lockd/host.c | |
| parent | 52f98f1a2ddd2bb561f2c7e3b19a81d816a63118 (diff) | |
| download | linux-e6237b6feb37582fbd6bd7a8336d1256a6b4b4f9.tar.bz2 | |
NFSv4.1: Don't rebind to the same source port when reconnecting to the server
NFSv2, v3 and NFSv4 servers often have duplicate replay caches that look
at the source port when deciding whether or not an RPC call is a replay
of a previous call. This requires clients to perform strange TCP gymnastics
in order to ensure that when they reconnect to the server, they bind
to the same source port.
NFSv4.1 and NFSv4.2 have sessions that provide proper replay semantics,
that do not look at the source port of the connection. This patch therefore
ensures they can ignore the rebind requirement.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Diffstat (limited to 'fs/lockd/host.c')
| -rw-r--r-- | fs/lockd/host.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/lockd/host.c b/fs/lockd/host.c index 7d46fafdbbe5..0afb6d59bad0 100644 --- a/fs/lockd/host.c +++ b/fs/lockd/host.c @@ -464,7 +464,8 @@ nlm_bind_host(struct nlm_host *host) .version = host->h_version, .authflavor = RPC_AUTH_UNIX, .flags = (RPC_CLNT_CREATE_NOPING | - RPC_CLNT_CREATE_AUTOBIND), + RPC_CLNT_CREATE_AUTOBIND | + RPC_CLNT_CREATE_REUSEPORT), .cred = host->h_cred, }; |