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| author | Weston Andros Adamson <dros@netapp.com> | 2013-09-24 21:58:02 +0400 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2013-09-30 00:03:34 +0400 |
| commit | 58a8cf1212f0f3b9afb07b73647a2bca4e5a28af (patch) | |
| tree | c90dad345ab5c10e63fff95942f03d8d4ab62276 | |
| parent | acd65e5bc1986d0089efec3fe63e52ea0c406d6d (diff) | |
| download | linux-58a8cf1212f0f3b9afb07b73647a2bca4e5a28af.tar.xz | |
NFSv4.1: try SECINFO_NO_NAME flavs until one works
Call nfs4_lookup_root_sec for each flavor returned by SECINFO_NO_NAME until
one works.
One example of a situation this fixes:
- server configured for krb5
- server principal somehow gets deleted from KDC
- server still thinking krb is good, sends krb5 as first entry in
SECINFO_NO_NAME response
- client tries krb5, but this fails without even sending an RPC because
gssd's requests to the KDC can't find the server's principal
Signed-off-by: Weston Andros Adamson <dros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| -rw-r--r-- | fs/nfs/nfs4proc.c | 30 |
1 files changed, 27 insertions, 3 deletions
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 488ef9b5c51a..f5fe16bd426c 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -7578,6 +7578,8 @@ nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, struct page *page; rpc_authflavor_t flavor; struct nfs4_secinfo_flavors *flavors; + struct nfs4_secinfo4 *secinfo; + int i; page = alloc_page(GFP_KERNEL); if (!page) { @@ -7599,9 +7601,31 @@ nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, if (err) goto out_freepage; - flavor = nfs_find_best_sec(flavors); - if (err == 0) - err = nfs4_lookup_root_sec(server, fhandle, info, flavor); + for (i = 0; i < flavors->num_flavors; i++) { + secinfo = &flavors->flavors[i]; + + switch (secinfo->flavor) { + case RPC_AUTH_NULL: + case RPC_AUTH_UNIX: + case RPC_AUTH_GSS: + flavor = rpcauth_get_pseudoflavor(secinfo->flavor, + &secinfo->flavor_info); + break; + default: + flavor = RPC_AUTH_MAXFLAVOR; + break; + } + + if (flavor != RPC_AUTH_MAXFLAVOR) { + err = nfs4_lookup_root_sec(server, fhandle, + info, flavor); + if (!err) + break; + } + } + + if (flavor == RPC_AUTH_MAXFLAVOR) + err = -EPERM; out_freepage: put_page(page); |