malhuda/msm-4.14
1
0
Fork 0
mirror of https://github.com/rd-stuffs/msm-4.14.git synced 2025-02-20 11:45:48 +08:00
Code Issues Actions Packages Projects Releases Wiki Activity

ANDROID: sdcardfs: Don't do d_add for lower fs

Browse Source 
For file based encryption, ext4 explicitly does not
create negative dentries for encrypted files. If you
force one over it, the decrypted file will be hidden
until the cache is cleared. Instead, just fail out.

Signed-off-by: Daniel Rosenberg <drosen@google.com>
Bug: 37231161
Change-Id: Id2a9708dfa75e1c22f89915c529789caadd2ca4b
This commit is contained in:
Daniel Rosenberg 2017-04-18 22:25:15 -07:00
parent ce02550067
commit b81400914c
1 changed files with 5 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
fs/sdcardfs/lookup.c
View File

@ -368,17 +368,15 @@ put_name:
dname.len = name->len;
dname.hash = full_name_hash(lower_dir_dentry, dname.name, dname.len);
lower_dentry = d_lookup(lower_dir_dentry, &dname);
if (lower_dentry)
goto setup_lower;
lower_dentry = d_alloc(lower_dir_dentry, &dname);
if (!lower_dentry) {
err = -ENOMEM;
/* We called vfs_path_lookup earlier, and did not get a negative
* dentry then. Don't confuse the lower filesystem by forcing
* one on it now...
*/
err = -ENOENT;
goto out;
}
d_add(lower_dentry, NULL); /* instantiate and hash */
setup_lower:
lower_path.dentry = lower_dentry;
lower_path.mnt = mntget(lower_dir_mnt);
sdcardfs_set_lower_path(dentry, &lower_path);