port_impl.h revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2003 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _SYS_PORT_IMPL_H
#define _SYS_PORT_IMPL_H
#pragma ident "%Z%%M% %I% %E% SMI"
#ifdef __cplusplus
extern "C" {
#endif
/*
* Note:
* The contents of this file are private to the implementation of the
* Solaris system and event ports subsystem and are subject to change
* at any time without notice.
*/
#include <sys/poll_impl.h>
#include <sys/port.h>
#include <sys/port_kernel.h>
#include <sys/vnode.h>
/*
* port system call codes
*/
#define PORT_CREATE 0 /* create a port */
#define PORT_ASSOCIATE 1 /* register object or object list */
#define PORT_DISSOCIATE 2 /* remove object association */
#define PORT_SEND 3 /* send user-defined event to a port */
#define PORT_SENDN 4 /* send user-defined event to a list of ports */
#define PORT_GET 5 /* receive object with events */
#define PORT_GETN 6 /* receive list of objects with events */
#define PORT_ALERT 7 /* set port in alert mode */
#define PORT_DISPATCH 8 /* dispatch object with events */
#define PORT_SYS_NOPORT 0x100 /* system call without port-id */
#define PORT_SYS_NOSHARE 0x200 /* non shareable event */
#define PORT_CODE_MASK 0xff
/* port_dispatch() flags */
#define PORT_SHARE_EVENT 0x01 /* event can be shared between procs */
/* port limits */
#define PORT_MAX_LIST 8192 /* max. # of list ent. per syscall */
#ifdef _KERNEL
#define PORT_SCACHE_SIZE 16 /* start source cache size */
#define PORT_SHASH(cookie) (cookie & (PORT_SCACHE_SIZE-1))
/* portkev_flags masks */
#define PORT_CLEANUP_DONE (PORT_KEV_FREE|PORT_KEV_DONEQ)
#define PORT_KEV_CACHE (PORT_KEV_CACHED|PORT_KEV_SCACHED)
#define PORT_KEV_WIRED (PORT_KEV_PRIVATE|PORT_KEV_CACHE)
#define PORT_FREE_EVENT(pev) (((pev)->portkev_flags & PORT_KEV_CACHE) == 0)
typedef struct port_alert {
int portal_events; /* passed to alert event */
pid_t portal_pid; /* owner of the alert mode */
uintptr_t portal_object; /* passed to alert event */
void *portal_user; /* passed to alert event */
} port_alert_t;
/*
* The port_queue_t structure is responsible for the management of all
* event activities within a port.
*/
typedef struct port_queue {
kmutex_t portq_mutex;
kmutex_t portq_block_mutex;
kcondvar_t portq_closecv;
int portq_flags;
uint_t portq_nent; /* number of events in the queue */
uint_t portq_nget; /* events required for waiting thread */
uint_t portq_tnent; /* number of events in the temp queue */
int portq_thrcnt; /* # of threads waiting for events */
int portq_getn; /* # of threads retrieving events */
struct portget *portq_thread; /* queue of waiting threads */
struct port_fdcache *portq_pcp; /* fd cache */
list_t portq_list; /* port event list */
list_t portq_get_list; /* port event list for port_get(n) */
kmutex_t portq_source_mutex;
port_source_t **portq_scache;
port_alert_t portq_alert; /* alert event data */
} port_queue_t;
/* defines for portq_flags */
#define PORTQ_ALERT 0x01 /* port in alert state */
#define PORTQ_CLOSE 0x02 /* closing port */
#define PORTQ_WAIT_EVENTS 0x04 /* waiting for new events */
#define PORTQ_POLLIN 0x08 /* events available in the event queue */
#define PORTQ_POLLOUT 0x10 /* space available for new events */
#define VTOEP(v) ((struct port *)(v->v_data))
#define EPTOV(ep) ((struct vnode *)(ep)->port_vnode)
typedef struct port {
vnode_t *port_vnode;
kmutex_t port_mutex;
kcondvar_t port_cv; /* resource control */
uint_t port_flags;
pid_t port_pid;
int port_fd;
uint_t port_max_events; /* max. number of event per port */
uint_t port_max_list; /* max. number of list structs */
uint_t port_curr; /* current number of event structs */
pollhead_t port_pollhd;
timespec_t port_ctime;
uid_t port_uid;
gid_t port_gid;
port_queue_t port_queue; /* global queue */
} port_t;
/* defines for port_flags */
#define PORT_INIT 0x01 /* port initialized */
#define PORT_CLOSED 0x02 /* owner closed the port */
#define PORT_EVENTS 0x04 /* waiting for event resources */
/*
* global control structure of port framework
*/
typedef struct port_control {
kmutex_t pc_mutex;
uint_t pc_nents; /* ports currently allocated */
struct kmem_cache *pc_cache; /* port event structures */
} port_control_t;
/*
* Every thread waiting on an object will use this structure to store
* all dependencies (flags, counters, events) before it awakes with
* some events/transactions completed
*/
typedef struct portget {
int portget_state;
uint_t portget_nget; /* number of expected events */
pid_t portget_pid;
kcondvar_t portget_cv;
port_alert_t portget_alert;
struct portget *portget_next;
struct portget *portget_prev;
} portget_t;
/* defines for portget_state */
#define PORTGET_ALERT 0x01 /* wake up and return alert event */
extern port_control_t port_control;
extern uint_t port_max_list;
/*
* port_getn() needs this structure to manage inter-process event delivery.
*/
typedef struct port_gettimer {
ushort_t pgt_flags;
ushort_t pgt_loop;
int pgt_timecheck;
timespec_t pgt_rqtime;
timespec_t *pgt_rqtp;
struct timespec *pgt_timeout;
} port_gettimer_t;
/* pgt_flags */
#define PORTGET_ONE 0x01 /* return only 1 object */
#define PORTGET_WAIT_EVENTS 0x02 /* thread is waiting for new events */
/*
* portfd_t is required to synchronize the association of fds with a port
* and the per-process list of open files.
* There is a pointer to a portfd structure in uf_entry_t.
* If a fd is closed then closeandsetf() is able to detect the association of
* the fd with a port or with a list of ports. closeandsetf() will dissociate
* the fd from the port(s).
*/
typedef struct portfd {
struct polldat pfd_pd;
struct portfd *pfd_next;
struct portfd *pfd_prev;
} portfd_t;
#define PFTOD(pfd) (&(pfd)->pfd_pd)
#define PDTOF(pdp) ((struct portfd *)(pdp))
#define PORT_FD_BUCKET(pcp, fd) \
(&(pcp)->pc_hash[((fd) % (pcp)->pc_hashsize)])
/*
* port_kstat_t contains the event port kernel values which are
* exported to kstat.
* Currently only the number of active ports is exported.
*/
typedef struct port_kstat {
kstat_named_t pks_ports;
} port_kstat_t;
/* misc functions */
int port_alloc_event_block(port_t *, int, int, struct port_kevent **);
void port_push_eventq(port_queue_t *);
void port_remove_done_event(struct port_kevent *);
struct port_kevent *port_get_kevent(list_t *, struct port_kevent *);
/* PORT_SOURCE_FD cache management */
void port_pcache_remove_fd(port_fdcache_t *, portfd_t *);
void port_remove_fd_object(portfd_t *, struct port *, port_fdcache_t *);
/* file close management */
extern void addfd_port(int, portfd_t *);
extern void delfd_port(int, portfd_t *);
#endif /* _KERNEL */
#ifdef __cplusplus
}
#endif
#endif /* _SYS_PORT_IMPL_H */