From 47040da3c7524facd542f37ffeadedac4f228601 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Sat, 7 Sep 2013 16:01:07 -0400 Subject: NFSv4: Allow security autonegotiation for submounts In cases where the parent super block was not mounted with a 'sec=' line, allow autonegotiation of security for the submounts. Signed-off-by: Trond Myklebust --- fs/nfs/nfs4client.c | 3 ++- fs/nfs/nfs4namespace.c | 21 +++++++++++++++++---- 2 files changed, 19 insertions(+), 5 deletions(-) diff --git a/fs/nfs/nfs4client.c b/fs/nfs/nfs4client.c index cc80085c4de4..a860ab566d6e 100644 --- a/fs/nfs/nfs4client.c +++ b/fs/nfs/nfs4client.c @@ -1078,7 +1078,8 @@ struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data, if (error < 0) goto error; - error = nfs4_server_common_setup(server, mntfh, false); + error = nfs4_server_common_setup(server, mntfh, + !(parent_server->flags & NFS_MOUNT_SECFLAVOUR)); if (error < 0) goto error; diff --git a/fs/nfs/nfs4namespace.c b/fs/nfs/nfs4namespace.c index cdb0b41a4810..2288cd3c9278 100644 --- a/fs/nfs/nfs4namespace.c +++ b/fs/nfs/nfs4namespace.c @@ -11,6 +11,7 @@ #include #include #include +#include #include #include #include @@ -369,21 +370,33 @@ out: struct vfsmount *nfs4_submount(struct nfs_server *server, struct dentry *dentry, struct nfs_fh *fh, struct nfs_fattr *fattr) { + rpc_authflavor_t flavor = server->client->cl_auth->au_flavor; struct dentry *parent = dget_parent(dentry); + struct inode *dir = parent->d_inode; + struct qstr *name = &dentry->d_name; struct rpc_clnt *client; struct vfsmount *mnt; /* Look it up again to get its attributes and sec flavor */ - client = nfs4_proc_lookup_mountpoint(parent->d_inode, &dentry->d_name, fh, fattr); + client = nfs4_proc_lookup_mountpoint(dir, name, fh, fattr); dput(parent); if (IS_ERR(client)) return ERR_CAST(client); - if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) + if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) { mnt = nfs_do_refmount(client, dentry); - else - mnt = nfs_do_submount(dentry, fh, fattr, client->cl_auth->au_flavor); + goto out; + } + if (client->cl_auth->au_flavor != flavor) + flavor = client->cl_auth->au_flavor; + else if (!(server->flags & NFS_MOUNT_SECFLAVOUR)) { + rpc_authflavor_t new = nfs4_negotiate_security(dir, name); + if ((int)new >= 0) + flavor = new; + } + mnt = nfs_do_submount(dentry, fh, fattr, flavor); +out: rpc_shutdown_client(client); return mnt; } -- cgit v1.2.3-58-ga151