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- /* Copyright (C) 2014 Stony Brook University
- This file is part of Graphene Library OS.
- Graphene Library OS is free software: you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public License
- as published by the Free Software Foundation, either version 3 of the
- License, or (at your option) any later version.
- Graphene Library OS is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU Lesser General Public License for more details.
- You should have received a copy of the GNU Lesser General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>. */
- /*
- * pal_host.h
- *
- * This file contains definition of PAL host ABI.
- */
- #ifndef PAL_HOST_H
- #define PAL_HOST_H
- #ifndef IN_PAL
- # error "cannot be included outside PAL"
- #endif
- #include <atomic.h>
- #include <spinlock.h>
- typedef spinlock_t PAL_LOCK;
- #define LOCK_INIT INIT_SPINLOCK_UNLOCKED
- #define _DkInternalLock spinlock_lock
- #define _DkInternalUnlock spinlock_unlock
- #define _DkInternalIsLocked spinlock_is_locked
- void * malloc_untrusted (int size);
- void free_untrusted (void * mem);
- #include <list.h>
- /* Simpler mutex design: a single variable that tracks whether the mutex
- * is locked (just waste a 64 bit word for now). State is 1 (locked) or
- * 0 (unlocked).
- *
- * Keep a count of how many threads are waiting on the mutex.
- *
- * If DEBUG_MUTEX is defined, mutex_handle will record the owner of
- * mutex locking. */
- struct mutex_handle {
- volatile int64_t * locked;
- struct atomic_int nwaiters;
- #ifdef DEBUG_MUTEX
- int owner;
- #endif
- };
- /* Initializer of Mutexes */
- #define MUTEX_HANDLE_INIT { .u = 0 }
- #define INIT_MUTEX_HANDLE(m) do { (m)->u = 0; } while (0)
- DEFINE_LIST(pal_handle_thread);
- struct pal_handle_thread {
- PAL_HDR reserved;
- PAL_IDX tid;
- PAL_PTR tcs;
- LIST_TYPE(pal_handle_thread) list;
- void * param;
- };
- /* RPC streams are encrypted with 256-bit AES keys */
- typedef uint8_t PAL_SESSION_KEY[32];
- typedef struct pal_handle
- {
- /*
- * Here we define the internal structure of PAL_HANDLE.
- * user has no access to the content inside these handles.
- */
- PAL_HDR hdr;
- union {
- struct {
- PAL_IDX fds[MAX_FDS];
- } generic;
- struct {
- PAL_IDX fd;
- PAL_STR realpath;
- PAL_NUM total;
- /* below fields are used only for trusted files */
- PAL_PTR stubs; /* contains hashes of file chunks */
- PAL_PTR umem; /* valid only when stubs != NULL */
- } file;
- struct {
- PAL_IDX fd;
- PAL_NUM pipeid;
- PAL_BOL nonblocking;
- } pipe;
- struct {
- PAL_IDX fds[MAX_FDS];
- PAL_BOL nonblocking;
- } pipeprv;
- struct {
- PAL_IDX fd;
- /* TODO: add other flags in future, if needed (e.g., semaphore) */
- PAL_BOL nonblocking;
- } eventfd;
- struct {
- PAL_IDX fd_in, fd_out;
- PAL_IDX dev_type;
- PAL_BOL destroy;
- PAL_STR realpath;
- } dev;
- struct {
- PAL_IDX fd;
- PAL_STR realpath;
- PAL_PTR buf;
- PAL_PTR ptr;
- PAL_PTR end;
- PAL_BOL endofstream;
- } dir;
- struct {
- PAL_IDX fd;
- PAL_PTR bind;
- PAL_PTR conn;
- PAL_BOL nonblocking;
- PAL_NUM linger;
- PAL_NUM receivebuf;
- PAL_NUM sendbuf;
- PAL_NUM receivetimeout;
- PAL_NUM sendtimeout;
- PAL_BOL tcp_cork;
- PAL_BOL tcp_keepalive;
- PAL_BOL tcp_nodelay;
- } sock;
- struct {
- PAL_IDX stream;
- PAL_IDX cargo;
- PAL_IDX pid;
- PAL_BOL nonblocking;
- PAL_SESSION_KEY session_key;
- void* ssl_ctx;
- } process;
- struct pal_handle_thread thread;
- struct {
- struct atomic_int nwaiters;
- PAL_NUM max_value;
- union {
- struct mutex_handle mut;
- } mutex;
- struct {
- struct atomic_int * signaled;
- struct atomic_int nwaiters;
- PAL_BOL isnotification;
- } event;
- };
- };
- } * PAL_HANDLE;
- #define RFD(n) (1 << (MAX_FDS*0 + (n)))
- #define WFD(n) (1 << (MAX_FDS*1 + (n)))
- #define ERROR(n) (1 << (MAX_FDS*2 + (n)))
- #define HANDLE_TYPE(handle) ((handle)->hdr.type)
- #endif /* PAL_HOST_H */
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