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authorWeston Andros Adamson <dros@netapp.com>2013-09-24 21:58:02 +0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2013-09-30 00:03:34 +0400
commit58a8cf1212f0f3b9afb07b73647a2bca4e5a28af (patch)
treec90dad345ab5c10e63fff95942f03d8d4ab62276
parentacd65e5bc1986d0089efec3fe63e52ea0c406d6d (diff)
downloadlinux-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.c30
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);