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: Daniel Rosenberg <drosen@google.com>
diff --git a/fs/sdcardfs/lookup.c b/fs/sdcardfs/lookup.c
index a01b06a..a127d05 100644
--- a/fs/sdcardfs/lookup.c
+++ b/fs/sdcardfs/lookup.c
@@ -240,6 +240,28 @@
/* 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) {