summaryrefslogtreecommitdiff
path: root/fs/nfs/nfs4namespace.c
diff options
context:
space:
mode:
authorBryan Schumaker <bjschuma@netapp.com>2012-04-27 21:27:40 +0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2012-04-27 22:10:02 +0400
commit72de53ec4bca39c26709122a8f78bfefe7b6bca4 (patch)
treedac32c44281b153df7104037c1e97c11deffae69 /fs/nfs/nfs4namespace.c
parentdb0a9593d52f935c80085d8993bdcead1ad30b0c (diff)
downloadlinux-72de53ec4bca39c26709122a8f78bfefe7b6bca4.tar.xz
NFS: Do secinfo as part of lookup
Whenever lookup sees wrongsec do a secinfo and retry the lookup to find attributes of the file or directory, such as "is this a referral mountpoint?". This also allows me to remove handling -NFS4ERR_WRONSEC as part of getattr xdr decoding. Signed-off-by: Bryan Schumaker <bjschuma@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/nfs4namespace.c')
-rw-r--r--fs/nfs/nfs4namespace.c52
1 files changed, 52 insertions, 0 deletions
diff --git a/fs/nfs/nfs4namespace.c b/fs/nfs/nfs4namespace.c
index 7483a177dc97..9f8681bf90de 100644
--- a/fs/nfs/nfs4namespace.c
+++ b/fs/nfs/nfs4namespace.c
@@ -132,6 +132,58 @@ static size_t nfs_parse_server_name(char *string, size_t len,
return ret;
}
+static rpc_authflavor_t nfs4_negotiate_security(struct inode *inode, struct qstr *name)
+{
+ struct page *page;
+ struct nfs4_secinfo_flavors *flavors;
+ rpc_authflavor_t flavor;
+ int err;
+
+ page = alloc_page(GFP_KERNEL);
+ if (!page)
+ return -ENOMEM;
+ flavors = page_address(page);
+
+ err = nfs4_proc_secinfo(inode, name, flavors);
+ if (err < 0) {
+ flavor = err;
+ goto out;
+ }
+
+ flavor = nfs_find_best_sec(flavors);
+
+out:
+ put_page(page);
+ return flavor;
+}
+
+/*
+ * Please call rpc_shutdown_client() when you are done with this client.
+ */
+struct rpc_clnt *nfs4_create_sec_client(struct rpc_clnt *clnt, struct inode *inode,
+ struct qstr *name)
+{
+ struct rpc_clnt *clone;
+ struct rpc_auth *auth;
+ rpc_authflavor_t flavor;
+
+ flavor = nfs4_negotiate_security(inode, name);
+ if (flavor < 0)
+ return ERR_PTR(flavor);
+
+ clone = rpc_clone_client(clnt);
+ if (IS_ERR(clone))
+ return clone;
+
+ auth = rpcauth_create(flavor, clone);
+ if (!auth) {
+ rpc_shutdown_client(clone);
+ clone = ERR_PTR(-EIO);
+ }
+
+ return clone;
+}
+
static struct vfsmount *try_location(struct nfs_clone_mount *mountdata,
char *page, char *page2,
const struct nfs4_fs_location *location)