NFS: Do secinfo as part of lookup

[linux-flexiantxendom0-3.2.10.git] / fs / nfs / nfs4proc.c

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index ff7571f..3d92fe6 100644 (file)
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -2528,39 +2528,69 @@ static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
        return status;
 }
 
-void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr, struct nfs_fh *fh)
+static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
 {
-       memset(fh, 0, sizeof(struct nfs_fh));
-       fattr->fsid.major = 1;
        fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
-               NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_FSID | NFS_ATTR_FATTR_MOUNTPOINT;
+               NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
        fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
        fattr->nlink = 2;
 }
 
-static int nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, struct qstr *name,
-                           struct nfs_fh *fhandle, struct nfs_fattr *fattr)
+static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
+                                  struct qstr *name, struct nfs_fh *fhandle,
+                                  struct nfs_fattr *fattr)
 {
        struct nfs4_exception exception = { };
+       struct rpc_clnt *client = *clnt;
        int err;
        do {
-               int status;
-
-               status = _nfs4_proc_lookup(clnt, dir, name, fhandle, fattr);
-               switch (status) {
+               err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
+               switch (err) {
                case -NFS4ERR_BADNAME:
-                       return -ENOENT;
+                       err = -ENOENT;
+                       goto out;
                case -NFS4ERR_MOVED:
-                       return nfs4_get_referral(dir, name, fattr, fhandle);
+                       err = nfs4_get_referral(dir, name, fattr, fhandle);
+                       goto out;
                case -NFS4ERR_WRONGSEC:
-                       nfs_fixup_secinfo_attributes(fattr, fhandle);
+                       err = -EPERM;
+                       if (client != *clnt)
+                               goto out;
+
+                       client = nfs4_create_sec_client(client, dir, name);
+                       if (IS_ERR(client))
+                               return PTR_ERR(client);
+
+                       exception.retry = 1;
+                       break;
+               default:
+                       err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
                }
-               err = nfs4_handle_exception(NFS_SERVER(dir),
-                               status, &exception);
        } while (exception.retry);
+
+out:
+       if (err == 0)
+               *clnt = client;
+       else if (client != *clnt)
+               rpc_shutdown_client(client);
+
        return err;
 }
 
+static int nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, struct qstr *name,
+                           struct nfs_fh *fhandle, struct nfs_fattr *fattr)
+{
+       int status;
+       struct rpc_clnt *client = NFS_CLIENT(dir);
+
+       status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
+       if (client != NFS_CLIENT(dir)) {
+               rpc_shutdown_client(client);
+               nfs_fixup_secinfo_attributes(fattr);
+       }
+       return status;
+}
+
 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
 {
        struct nfs_server *server = NFS_SERVER(inode);
@@ -4996,8 +5026,8 @@ static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct
        return status;
 }
 
-static int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
-               struct nfs4_secinfo_flavors *flavors)
+int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
+                     struct nfs4_secinfo_flavors *flavors)
 {
        struct nfs4_exception exception = { };
        int err;