NFSv4: Ensure that we track the NFSv4 lock state in read/write requests.

This patch fixes bugzilla entry 14501:
  https://bugzilla.kernel.org/show_bug.cgi?id=14501

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 11 insertions, 2 deletions

diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index 77c2ae53431c..a9d802615082 100644
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -72,13 +72,20 @@ struct nfs_access_entry {
         int                     mask;
 };
 
+struct nfs_lock_context {
+        atomic_t count;
+        struct list_head list;
+        struct nfs_open_context *open_context;
+        fl_owner_t lockowner;
+        pid_t pid;
+};
+
 struct nfs4_state;
 struct nfs_open_context {
-        atomic_t count;
+        struct nfs_lock_context lock_context;
         struct path path;
         struct rpc_cred *cred;
         struct nfs4_state *state;
-        fl_owner_t lockowner;
         fmode_t mode;
 
         unsigned long flags;
@@ -353,6 +360,8 @@ extern void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr);
 extern struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx);
 extern void put_nfs_open_context(struct nfs_open_context *ctx);
 extern struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode);
+extern struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx);
+extern void nfs_put_lock_context(struct nfs_lock_context *l_ctx);
 extern u64 nfs_compat_user_ino64(u64 fileid);
 extern void nfs_fattr_init(struct nfs_fattr *fattr);