security.h

umon bootloader source code, support mips cpu.

 *	Return 0 if permission is granted.
 * @task_setnice:
 *	Check permission before setting the nice value of @p to @nice.
 *	@p contains the task_struct of process.
 *	@nice contains the new nice value.
 *	Return 0 if permission is granted.
 * @task_setrlimit:
 *	Check permission before setting the resource limits of the current
 *	process for @resource to @new_rlim.  The old resource limit values can
 *	be examined by dereferencing (current->signal->rlim + resource).
 *	@resource contains the resource whose limit is being set.
 *	@new_rlim contains the new limits for @resource.
 *	Return 0 if permission is granted.
 * @task_setscheduler:
 *	Check permission before setting scheduling policy and/or parameters of
 *	process @p based on @policy and @lp.
 *	@p contains the task_struct for process.
 *	@policy contains the scheduling policy.
 *	@lp contains the scheduling parameters.
 *	Return 0 if permission is granted.
 * @task_getscheduler:
 *	Check permission before obtaining scheduling information for process
 *	@p.
 *	@p contains the task_struct for process.
 *	Return 0 if permission is granted.
 * @task_kill:
 *	Check permission before sending signal @sig to @p.  @info can be NULL,
 *	the constant 1, or a pointer to a siginfo structure.  If @info is 1 or
 *	SI_FROMKERNEL(info) is true, then the signal should be viewed as coming
 *	from the kernel and should typically be permitted.
 *	SIGIO signals are handled separately by the send_sigiotask hook in
 *	file_security_ops.
 *	@p contains the task_struct for process.
 *	@info contains the signal information.
 *	@sig contains the signal value.
 *	Return 0 if permission is granted.
 * @task_wait:
 *	Check permission before allowing a process to reap a child process @p
 *	and collect its status information.
 *	@p contains the task_struct for process.
 *	Return 0 if permission is granted.
 * @task_prctl:
 *	Check permission before performing a process control operation on the
 *	current process.
 *	@option contains the operation.
 *	@arg2 contains a argument.
 *	@arg3 contains a argument.
 *	@arg4 contains a argument.
 *	@arg5 contains a argument.
 *	Return 0 if permission is granted.
 * @task_reparent_to_init:
 * 	Set the security attributes in @p->security for a kernel thread that
 * 	is being reparented to the init task.
 *	@p contains the task_struct for the kernel thread.
 * @task_to_inode:
 * 	Set the security attributes for an inode based on an associated task's
 * 	security attributes, e.g. for /proc/pid inodes.
 *	@p contains the task_struct for the task.
 *	@inode contains the inode structure for the inode.
 *
 * Security hooks for Netlink messaging.
 *
 * @netlink_send:
 *	Save security information for a netlink message so that permission
 *	checking can be performed when the message is processed.  The security
 *	information can be saved using the eff_cap field of the
 *      netlink_skb_parms structure.  Also may be used to provide fine
 *	grained control over message transmission.
 *	@sk associated sock of task sending the message.,
 *	@skb contains the sk_buff structure for the netlink message.
 *	Return 0 if the information was successfully saved and message
 *	is allowed to be transmitted.
 * @netlink_recv:
 *	Check permission before processing the received netlink message in
 *	@skb.
 *	@skb contains the sk_buff structure for the netlink message.
 *	Return 0 if permission is granted.
 *
 * Security hooks for Unix domain networking.
 *
 * @unix_stream_connect:
 *	Check permissions before establishing a Unix domain stream connection
 *	between @sock and @other.
 *	@sock contains the socket structure.
 *	@other contains the peer socket structure.
 *	Return 0 if permission is granted.
 * @unix_may_send:
 *	Check permissions before connecting or sending datagrams from @sock to
 *	@other.
 *	@sock contains the socket structure.
 *	@sock contains the peer socket structure.
 *	Return 0 if permission is granted.
 *
 * The @unix_stream_connect and @unix_may_send hooks were necessary because
 * Linux provides an alternative to the conventional file name space for Unix
 * domain sockets.  Whereas binding and connecting to sockets in the file name
 * space is mediated by the typical file permissions (and caught by the mknod
 * and permission hooks in inode_security_ops), binding and connecting to
 * sockets in the abstract name space is completely unmediated.  Sufficient
 * control of Unix domain sockets in the abstract name space isn't possible
 * using only the socket layer hooks, since we need to know the actual target
 * socket, which is not looked up until we are inside the af_unix code.
 *
 * Security hooks for socket operations.
 *
 * @socket_create:
 *	Check permissions prior to creating a new socket.
 *	@family contains the requested protocol family.
 *	@type contains the requested communications type.
 *	@protocol contains the requested protocol.
 *	@kern set to 1 if a kernel socket.
 *	Return 0 if permission is granted.
 * @socket_post_create:
 *	This hook allows a module to update or allocate a per-socket security
 *	structure. Note that the security field was not added directly to the
 *	socket structure, but rather, the socket security information is stored
 *	in the associated inode.  Typically, the inode alloc_security hook will
 *	allocate and and attach security information to
 *	sock->inode->i_security.  This hook may be used to update the
 *	sock->inode->i_security field with additional information that wasn't
 *	available when the inode was allocated.
 *	@sock contains the newly created socket structure.
 *	@family contains the requested protocol family.
 *	@type contains the requested communications type.
 *	@protocol contains the requested protocol.
 *	@kern set to 1 if a kernel socket.
 * @socket_bind:
 *	Check permission before socket protocol layer bind operation is
 *	performed and the socket @sock is bound to the address specified in the
 *	@address parameter.
 *	@sock contains the socket structure.
 *	@address contains the address to bind to.
 *	@addrlen contains the length of address.
 *	Return 0 if permission is granted.  
 * @socket_connect:
 *	Check permission before socket protocol layer connect operation
 *	attempts to connect socket @sock to a remote address, @address.
 *	@sock contains the socket structure.
 *	@address contains the address of remote endpoint.
 *	@addrlen contains the length of address.
 *	Return 0 if permission is granted.  
 * @socket_listen:
 *	Check permission before socket protocol layer listen operation.
 *	@sock contains the socket structure.
 *	@backlog contains the maximum length for the pending connection queue.
 *	Return 0 if permission is granted.
 * @socket_accept:
 *	Check permission before accepting a new connection.  Note that the new
 *	socket, @newsock, has been created and some information copied to it,
 *	but the accept operation has not actually been performed.
 *	@sock contains the listening socket structure.
 *	@newsock contains the newly created server socket for connection.
 *	Return 0 if permission is granted.
 * @socket_post_accept:
 *	This hook allows a security module to copy security
 *	information into the newly created socket's inode.
 *	@sock contains the listening socket structure.
 *	@newsock contains the newly created server socket for connection.
 * @socket_sendmsg:
 *	Check permission before transmitting a message to another socket.
 *	@sock contains the socket structure.
 *	@msg contains the message to be transmitted.
 *	@size contains the size of message.
 *	Return 0 if permission is granted.
 * @socket_recvmsg:
 *	Check permission before receiving a message from a socket.
 *	@sock contains the socket structure.
 *	@msg contains the message structure.
 *	@size contains the size of message structure.
 *	@flags contains the operational flags.
 *	Return 0 if permission is granted.  
 * @socket_getsockname:
 *	Check permission before the local address (name) of the socket object
 *	@sock is retrieved.
 *	@sock contains the socket structure.
 *	Return 0 if permission is granted.
 * @socket_getpeername:
 *	Check permission before the remote address (name) of a socket object
 *	@sock is retrieved.
 *	@sock contains the socket structure.
 *	Return 0 if permission is granted.
 * @socket_getsockopt:
 *	Check permissions before retrieving the options associated with socket
 *	@sock.
 *	@sock contains the socket structure.
 *	@level contains the protocol level to retrieve option from.
 *	@optname contains the name of option to retrieve.
 *	Return 0 if permission is granted.
 * @socket_setsockopt:
 *	Check permissions before setting the options associated with socket
 *	@sock.
 *	@sock contains the socket structure.
 *	@level contains the protocol level to set options for.
 *	@optname contains the name of the option to set.
 *	Return 0 if permission is granted.  
 * @socket_shutdown:
 *	Checks permission before all or part of a connection on the socket
 *	@sock is shut down.
 *	@sock contains the socket structure.
 *	@how contains the flag indicating how future sends and receives are handled.
 *	Return 0 if permission is granted.
 * @socket_sock_rcv_skb:
 *	Check permissions on incoming network packets.  This hook is distinct
 *	from Netfilter's IP input hooks since it is the first time that the
 *	incoming sk_buff @skb has been associated with a particular socket, @sk.
 *	@sk contains the sock (not socket) associated with the incoming sk_buff.
 *	@skb contains the incoming network data.
 * @socket_getpeersec:
 *	This hook allows the security module to provide peer socket security
 *	state to userspace via getsockopt SO_GETPEERSEC.
 *	@sock is the local socket.
 *	@optval userspace memory where the security state is to be copied.
 *	@optlen userspace int where the module should copy the actual length
 *	of the security state.
 *	@len as input is the maximum length to copy to userspace provided
 *	by the caller.
 *	Return 0 if all is well, otherwise, typical getsockopt return
 *	values.
 * @sk_alloc_security:
 *      Allocate and attach a security structure to the sk->sk_security field,
 *      which is used to copy security attributes between local stream sockets.
 * @sk_free_security:
 *	Deallocate security structure.
 *
 * Security hooks affecting all System V IPC operations.
 *
 * @ipc_permission:
 *	Check permissions for access to IPC
 *	@ipcp contains the kernel IPC permission structure
 *	@flag contains the desired (requested) permission set
 *	Return 0 if permission is granted.
 *
 * Security hooks for individual messages held in System V IPC message queues
 * @msg_msg_alloc_security:
 *	Allocate and attach a security structure to the msg->security field.
 *	The security field is initialized to NULL when the structure is first
 *	created.
 *	@msg contains the message structure to be modified.
 *	Return 0 if operation was successful and permission is granted.
 * @msg_msg_free_security:
 *	Deallocate the security structure for this message.
 *	@msg contains the message structure to be modified.
 *
 * Security hooks for System V IPC Message Queues
 *
 * @msg_queue_alloc_security:
 *	Allocate and attach a security structure to the
 *	msq->q_perm.security field. The security field is initialized to
 *	NULL when the structure is first created.
 *	@msq contains the message queue structure to be modified.
 *	Return 0 if operation was successful and permission is granted.
 * @msg_queue_free_security:
 *	Deallocate security structure for this message queue.
 *	@msq contains the message queue structure to be modified.
 * @msg_queue_associate:
 *	Check permission when a message queue is requested through the
 *	msgget system call.  This hook is only called when returning the
 *	message queue identifier for an existing message queue, not when a
 *	new message queue is created.
 *	@msq contains the message queue to act upon.
 *	@msqflg contains the operation control flags.
 *	Return 0 if permission is granted.
 * @msg_queue_msgctl:
 *	Check permission when a message control operation specified by @cmd
 *	is to be performed on the message queue @msq.
 *	The @msq may be NULL, e.g. for IPC_INFO or MSG_INFO.
 *	@msq contains the message queue to act upon.  May be NULL.
 *	@cmd contains the operation to be performed.
 *	Return 0 if permission is granted.  
 * @msg_queue_msgsnd:
 *	Check permission before a message, @msg, is enqueued on the message
 *	queue, @msq.
 *	@msq contains the message queue to send message to.
 *	@msg contains the message to be enqueued.
 *	@msqflg contains operational flags.
 *	Return 0 if permission is granted.
 * @msg_queue_msgrcv:
 *	Check permission before a message, @msg, is removed from the message
 *	queue, @msq.  The @target task structure contains a pointer to the 
 *	process that will be receiving the message (not equal to the current 
 *	process when inline receives are being performed).
 *	@msq contains the message queue to retrieve message from.
 *	@msg contains the message destination.
 *	@target contains the task structure for recipient process.
 *	@type contains the type of message requested.
 *	@mode contains the operational flags.
 *	Return 0 if permission is granted.
 *
 * Security hooks for System V Shared Memory Segments
 *