knfsd: exportfs: untangle ISDIR logic in find_exported_dentry

Rework some logic in find_exported_dentry so that we only have a single
S_ISDIR check and logic that makes clear to the reader what we're really doing
here.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/fs/exportfs/expfs.c b/fs/exportfs/expfs.c
index 1e6f556..abf0a31 100644 (file)
--- a/fs/exportfs/expfs.c
+++ b/fs/exportfs/expfs.c
@@ -116,30 +116,23 @@ find_exported_dentry(struct super_block *sb, void *obj, void *parent,
        if (IS_ERR(result))
                return result;
 
-       if (S_ISDIR(result->d_inode->i_mode) &&
-           (result->d_flags & DCACHE_DISCONNECTED)) {
-               /* it is an unconnected directory, we must connect it */
-               ;
-       } else {
-               if (acceptable(context, result))
-                       return result;
-               if (S_ISDIR(result->d_inode->i_mode)) {
+       if (S_ISDIR(result->d_inode->i_mode)) {
+               if (!(result->d_flags & DCACHE_DISCONNECTED)) {
+                       if (acceptable(context, result))
+                               return result;
                        err = -EACCES;
                        goto err_result;
                }
 
+               target_dir = dget(result);
+       } else {
+               if (acceptable(context, result))
+                       return result;
+
                alias = find_acceptable_alias(result, acceptable, context);
                if (alias)
                        return alias;
-       }                       
 
-       /* It's a directory, or we are required to confirm the file's
-        * location in the tree based on the parent information
-        */
-       dprintk("find_exported_dentry: need to look harder for %s/%d\n",sb->s_id,*(int*)obj);
-       if (S_ISDIR(result->d_inode->i_mode))
-               target_dir = dget(result);
-       else {
                if (parent == NULL)
                        goto err_result;
 
@@ -149,6 +142,7 @@ find_exported_dentry(struct super_block *sb, void *obj, void *parent,
                        goto err_result;
                }
        }
+
        /*
         * Now we need to make sure that target_dir is properly connected.
         * It may already be, as the flag isn't always updated when connection