fscrypt_find_master

函数名称：Find the specified master key in ->s_master_keys.* Returns ERR_PTR(-ENOKEY) if not found.

函数原型：struct key *fscrypt_find_master_key(struct super_block *sb, const struct fscrypt_key_specifier *mk_spec)

返回类型：struct key

参数：

类型	参数	名称
struct super_block *	sb
const struct fscrypt_key_specifier *	mk_spec

**调用者**
名称	描述
add_master_key
fscrypt_verify_key_added	Verify that the current user has added a master key with the given identifier* (returns -ENOKEY if not)
do_remove_key	Try to remove an fscrypt master encryption key
fscrypt_ioctl_get_key_status	Retrieve the status of an fscrypt master encryption key
setup_file_encryption_key	Find the master key, then set up the inode's actual encryption key.* If the master key is found in the filesystem-level keyring, then the* corresponding 'struct key' is returned in master_key_ret with ->mk_secret_sem read-locked

函数逻辑报告