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| author | J. Bruce Fields <bfields@citi.umich.edu> | 2010-05-14 17:57:35 -0400 |
|---|---|---|
| committer | J. Bruce Fields <bfields@citi.umich.edu> | 2010-05-18 11:51:38 -0400 |
| commit | b7299f44394336f51b526247a870d47d28f4f97c (patch) | |
| tree | bb8e365349e9e048f0f927843acca26ddd6a8e2b | |
| parent | 15ddb4aec54422ead137b03ea4e9b3f5db3f7cc2 (diff) | |
| download | linux-b7299f44394336f51b526247a870d47d28f4f97c.tar.gz linux-b7299f44394336f51b526247a870d47d28f4f97c.tar.bz2 linux-b7299f44394336f51b526247a870d47d28f4f97c.zip | |
nfs4: minor callback code simplification, comment
Note the position in the version array doesn't have to match the actual
rpc version number--to me it seems clearer to maintain the distinction.
Also document choice of rpc callback version number, as discussed in
e.g. http://www.ietf.org/mail-archive/web/nfsv4/current/msg07985.html
and followups.
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
| -rw-r--r-- | fs/nfsd/nfs4callback.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c index 77bc9d3c80fd..eb78e7e22077 100644 --- a/fs/nfsd/nfs4callback.c +++ b/fs/nfsd/nfs4callback.c @@ -424,13 +424,19 @@ static struct rpc_procinfo nfs4_cb_procedures[] = { }; static struct rpc_version nfs_cb_version4 = { +/* + * Note on the callback rpc program version number: despite language in rfc + * 5661 section 18.36.3 requiring servers to use 4 in this field, the + * official xdr descriptions for both 4.0 and 4.1 specify version 1, and + * in practice that appears to be what implementations use. The section + * 18.36.3 language is expected to be fixed in an erratum. + */ .number = 1, .nrprocs = ARRAY_SIZE(nfs4_cb_procedures), .procs = nfs4_cb_procedures }; static struct rpc_version * nfs_cb_version[] = { - NULL, &nfs_cb_version4, }; @@ -471,7 +477,7 @@ int setup_callback_client(struct nfs4_client *clp, struct nfs4_cb_conn *cb) .timeout = &timeparms, .program = &cb_program, .prognumber = cb->cb_prog, - .version = nfs_cb_version[1]->number, + .version = 0, .authflavor = clp->cl_flavor, .flags = (RPC_CLNT_CREATE_NOPING | RPC_CLNT_CREATE_QUIET), .client_name = clp->cl_principal, |