key_put

类型	参数	名称
struct key *	key

**调用者**
名称	描述
put_cred_rcu	The RCU callback to actually dispose of a set of credentials
prepare_exec_creds	Prepare credentials for current to perform an execve()* - The caller must hold ->cred_guard_mutex
copy_creds	复制信任
set_cred_user_ns
create_user_ns	Create a new user namespace, deriving the creator from the user in the* passed credentials, and replacing that user with the new root user for the* new namespace.* This is called by copy_creds(), which will finish setting the target task's* credentials.
__key_update	Attempt to update an existing key.* The key is given to us with an incremented refcount that we need to discard* if we get an error.
key_create_or_update	key_create_or_update - Update or create and instantiate a key.@keyring_ref: A pointer to the destination keyring with possession flag.@type: The type of key.*@description: The searchable description for the key.
key_free_user_ns	Clean up the bits of user_namespace that belong to us.
keyring_free_object	Free an object after stripping the keyring flag off of the pointer.
keyring_destroy
keyring_alloc	Allocate a keyring and link into the destination keyring.
keyring_restrict	keyring_restrict - Look up and apply a restriction to a keyring@keyring_ref: The keyring to be restricted@type: The key type that will provide the restriction checker.*@restriction: The restriction options to apply to the keyring
keyring_restriction_gc	Garbage collect restriction pointers from a keyring
SYSCALL_DEFINE4	Search the process keyrings and keyring trees linked from those for a* matching key. Keyrings must have appropriate Search permission to be* searched.* If a key is found, it will be attached to the destination keyring if there's
keyctl_describe_key	Return a description of a key to userspace
keyctl_read_key	Read a key's payload
keyctl_chown_key	Change the ownership of a key* The key must grant the caller Setattr permission for this to work, though* the key need not be fully instantiated yet. For the UID to be changed, or* for the GID to be changed to a group the caller is not a member of, the
keyctl_setperm_key	Change the permission mask on a key.* The key must grant the caller Setattr permission for this to work, though* the key need not be fully instantiated yet. If the caller does not have
keyctl_change_reqkey_auth	Change the request_key authorisation key on the current process.
keyctl_instantiate_key_common	Instantiate a key with the specified payload and link the key into the* destination keyring if one is given.* The caller must have the appropriate instantiation permit set for this to* work (see keyctl_assume_authority). No other permissions are required.
keyctl_reject_key	Negatively instantiate the key with the given timeout (in seconds) and error* code and link the key into the destination keyring if one is given.* The caller must have the appropriate instantiation permit set for this to
keyctl_set_timeout	Set or clear the timeout on a key.* Either the key must grant the caller Setattr permission or else the caller* must hold an instantiation authorisation token for the key.* The timeout is either 0 to clear the timeout, or a number of seconds from
keyctl_assume_authority	Assume (or clear) the authority to instantiate the specified key
keyctl_get_security	Get a key's the LSM security label.* The key must grant the caller View permission for this to work.* If there's a buffer, then up to buflen bytes of data will be placed into it.* If successful, the amount of information available will be returned,
look_up_user_keyrings	Look up the user and user session keyrings for the current process's UID,* creating them if they don't exist.
install_session_keyring_to_cred	Install the given keyring as the session keyring of the given credentials* struct, replacing the existing one if any. If the given keyring is NULL,* then install a new anonymous session keyring.*@cred can not be in use by any task yet.
search_cred_keyrings_rcu	Search the process keyrings attached to the supplied cred for the first* matching key under RCU conditions (the caller must be holding the RCU read* lock)
lookup_user_key	Look up a key ID given us by userspace with a given permissions mask to get* the key it refers to.* Flags can be passed to request that special keyrings be created if referred* to directly, to permit partially constructed keys to be found and to skip
join_session_keyring	Join the named keyring as the session keyring if possible else attempt to* create a new one of that name and join that
umh_keys_cleanup	Clean up a usermode helper with session keyring.
call_sbin_request_key	Request userspace finish the construction of a key* - execute "/sbin/request-key "
construct_key	Call out to userspace for key construction.* Program failure is ignored in favour of key status.
construct_get_dest_keyring	Get the appropriate destination keyring for the request.* The keyring selected is returned with an extra reference upon it which the* caller must release.
construct_alloc_key	Allocate a new key in under-construction state and attempt to link it in to* the requested keyring.* May return a key that's already under construction instead if there was a* race between two thread calling request_key().
construct_key_and_link	Commence key construction.
request_key_and_link	quest_key_and_link - Request a key and cache it in a keyring.@type: The type of key we want.@description: The searchable description of the key.*@domain_tag: The domain in which the key operates.
request_key_tag	quest_key_tag - Request a key and wait for construction*@type: Type of key
request_key_with_auxdata	quest_key_with_auxdata - Request a key with auxiliary data for the upcaller@type: The type of key we want.@description: The searchable description of the key.*@domain_tag: The domain in which the key operates.
free_request_key_auth
request_key_auth_new	Create an authorisation token for /sbin/request-key or whoever to gain* access to the caller's security data.
key_get_instantiation_authkey	Search the current process's keyrings for the authorisation key for* instantiation of a key.
dh_data_from_key
keyctl_pkey_params_free
request_user_key	quest_user_key - request the user key* Use a user provided key to encrypt/decrypt an encrypted-key.
encrypted_key_decrypt
encrypted_read	rypted_read - format and copy the encrypted data to userspace* The resulting datablob format is:* * On success, return to userspace the encrypted key datablob size.
asymmetric_verify
evm_init_key	Get the key from the TPM for the SHA1-HMAC
fscrypt_sb_free
add_master_key_user	Give the current user a "key" in ->mk_users. This charges the user's quota* and marks the master key as added by the current user, so that it cannot be* removed by another user with the key. Either the master key's key->sem must
remove_master_key_user	Remove the current user's "key" from ->mk_users.* The master key's key->sem must be held for write.* Returns 0 if removed, -ENOKEY if not found, or another -errno code.
add_new_master_key	Allocate a new fscrypt_master_key which contains the given secret, set it as* the payload of a new 'struct key' of type fscrypt, and link the 'struct key'* into the given keyring. Synchronized by fscrypt_add_key_mutex.
add_existing_master_key
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
put_crypt_info
fscrypt_get_encryption_info
find_and_lock_process_key	Search the current task's subscribed keyrings for a "logon" key with* description prefix:descriptor, and if found acquire a read lock on it and* return a pointer to its validated payload in *payload_ret.
fscrypt_setup_v1_file_key_via_subscribed_keyrings
fsverity_init_signature
digsig_verify	digsig_verify() - digital signature verification with public key@keyring: keyring to search key in@sig: digital signature@siglen: length of the signature@data: data@datalen: length of the data Returns 0 on success, -EINVAL otherwise
key_ref_put

函数逻辑报告