From 2f61830ae33e2944ad66bb8bb40916f534b2e494 Mon Sep 17 00:00:00 2001 From: Theodore Ts'o Date: Sun, 12 Apr 2015 00:56:26 -0400 Subject: ext4 crypto: teach ext4_htree_store_dirent() to store decrypted filenames For encrypted directories, we need to pass in a separate parameter for the decrypted filename, since the directory entry contains the encrypted filename. Signed-off-by: Theodore Ts'o --- fs/ext4/dir.c | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) (limited to 'fs/ext4/dir.c') diff --git a/fs/ext4/dir.c b/fs/ext4/dir.c index 9e1e9e7869cb..315f13ad382e 100644 --- a/fs/ext4/dir.c +++ b/fs/ext4/dir.c @@ -382,10 +382,15 @@ void ext4_htree_free_dir_info(struct dir_private_info *p) /* * Given a directory entry, enter it into the fname rb tree. + * + * When filename encryption is enabled, the dirent will hold the + * encrypted filename, while the htree will hold decrypted filename. + * The decrypted filename is passed in via ent_name. parameter. */ int ext4_htree_store_dirent(struct file *dir_file, __u32 hash, __u32 minor_hash, - struct ext4_dir_entry_2 *dirent) + struct ext4_dir_entry_2 *dirent, + struct ext4_str *ent_name) { struct rb_node **p, *parent = NULL; struct fname *fname, *new_fn; @@ -396,17 +401,17 @@ int ext4_htree_store_dirent(struct file *dir_file, __u32 hash, p = &info->root.rb_node; /* Create and allocate the fname structure */ - len = sizeof(struct fname) + dirent->name_len + 1; + len = sizeof(struct fname) + ent_name->len + 1; new_fn = kzalloc(len, GFP_KERNEL); if (!new_fn) return -ENOMEM; new_fn->hash = hash; new_fn->minor_hash = minor_hash; new_fn->inode = le32_to_cpu(dirent->inode); - new_fn->name_len = dirent->name_len; + new_fn->name_len = ent_name->len; new_fn->file_type = dirent->file_type; - memcpy(new_fn->name, dirent->name, dirent->name_len); - new_fn->name[dirent->name_len] = 0; + memcpy(new_fn->name, ent_name->name, ent_name->len); + new_fn->name[ent_name->len] = 0; while (*p) { parent = *p; -- cgit v1.2.3