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Commit 5d61f892 authored by Daniel Rosenberg's avatar Daniel Rosenberg
Browse files

ANDROID: sdcardfs: Check for other cases on path lookup 



This fixes a bug where the first lookup of a
file or folder created under a different view
would not be case insensitive. It will now
search through for a case insensitive match
if the initial lookup fails.

Bug:28024488
Change-Id: I4ff9ce297b9f2f9864b47540e740fd491c545229
Signed-off-by: default avatarDaniel Rosenberg <drosen@google.com>
parent e520ac67

fs/sdcardfs/lookup.c

+22 −0
Original line number Diff line number Diff line
@@ -240,6 +240,28 @@ static struct dentry *__sdcardfs_lookup(struct dentry *dentry, 
	/* Use vfs_path_lookup to check if the dentry exists or not */

	err = vfs_path_lookup(lower_dir_dentry, lower_dir_mnt, name, 0,

				&lower_path);

	/* check for other cases */

	if (err == -ENOENT) {

		struct dentry *child;

		struct dentry *match = NULL;

		spin_lock(&lower_dir_dentry->d_lock);

		list_for_each_entry(child, &lower_dir_dentry->d_subdirs, d_child) {

			if (child && d_inode(child)) {

				if (strcasecmp(child->d_name.name, name)==0) {

					match = dget(child);

					break;

				}

			}

		}

		spin_unlock(&lower_dir_dentry->d_lock);

		if (match) {

			err = vfs_path_lookup(lower_dir_dentry,

						lower_dir_mnt,

						match->d_name.name, 0,

						&lower_path);

			dput(match);

		}

	}



	/* no error: handle positive dentries */

	if (!err) {