Merge tag 'nfs-for-4.5-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

[cascardo/linux.git] / fs / nfs / inode.c

diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 8d0eb49..c11e855 100644 (file)
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -414,9 +414,10 @@ nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr, st
                                inode->i_fop = NULL;
                                inode->i_flags |= S_AUTOMOUNT;
                        }
-               } else if (S_ISLNK(inode->i_mode))
+               } else if (S_ISLNK(inode->i_mode)) {
                        inode->i_op = &nfs_symlink_inode_operations;
-               else
+                       inode_nohighmem(inode);
+               } else
                        init_special_inode(inode, inode->i_mode, fattr->rdev);
 
                memset(&inode->i_atime, 0, sizeof(inode->i_atime));
@@ -1098,6 +1099,27 @@ static bool nfs_mapping_need_revalidate_inode(struct inode *inode)
                || NFS_STALE(inode);
 }
 
+int nfs_revalidate_mapping_rcu(struct inode *inode)
+{
+       struct nfs_inode *nfsi = NFS_I(inode);
+       unsigned long *bitlock = &nfsi->flags;
+       int ret = 0;
+
+       if (IS_SWAPFILE(inode))
+               goto out;
+       if (nfs_mapping_need_revalidate_inode(inode)) {
+               ret = -ECHILD;
+               goto out;
+       }
+       spin_lock(&inode->i_lock);
+       if (test_bit(NFS_INO_INVALIDATING, bitlock) ||
+           (nfsi->cache_validity & NFS_INO_INVALID_DATA))
+               ret = -ECHILD;
+       spin_unlock(&inode->i_lock);
+out:
+       return ret;
+}
+
 /**
  * __nfs_revalidate_mapping - Revalidate the pagecache
  * @inode - pointer to host inode