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linux-sg2042
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ext4: don't bother checking for encryption key in ->mmap() 

Since only an open file can be mmap'ed, and we only allow open()ing an
encrypted file when its key is available, there is no need to check for
the key again before permitting each mmap().

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Eric Biggers 2017-06-23 19:41:38 -04:00 committed by Theodore Ts'o
parent 1ea1516fbb
commit 66e0aaadce
1 changed files with 0 additions and 7 deletions
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7
fs/ext4/file.c
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@ -345,13 +345,6 @@ static int ext4_file_mmap(struct file *file, struct vm_area_struct *vma)
if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb))))
return -EIO;
if (ext4_encrypted_inode(inode)) {
int err = fscrypt_get_encryption_info(inode);
if (err)
return 0;
if (!fscrypt_has_encryption_key(inode))
return -ENOKEY;
}
file_accessed(file);
if (IS_DAX(file_inode(file))) {
vma->vm_ops = &ext4_dax_vm_ops;