1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #ifndef _SYS_PORT_KERNEL_H 28 #define _SYS_PORT_KERNEL_H 29 30 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 #include <sys/vnode.h> 33 #include <sys/list.h> 34 35 #ifdef __cplusplus 36 extern "C" { 37 #endif 38 39 /* 40 * Note: 41 * The contents of this file are private to the implementation of the 42 * Solaris system and event ports subsystem and are subject to change 43 * at any time without notice. 44 */ 45 46 #ifdef _KERNEL 47 48 /* 49 * The port_kevent_t struct represents the kernel internal port event. 50 * Every event is associated to a port (portkev_port). 51 */ 52 typedef struct port_kevent { 53 kmutex_t portkev_lock; /* used by PORT_SOURCE_FD source */ 54 int portkev_source; /* event: source */ 55 int portkev_events; /* event: data */ 56 int portkev_flags; /* internal flags */ 57 pid_t portkev_pid; /* pid of process using this struct */ 58 long portkev_object; /* event: object */ 59 void *portkev_user; /* event: user-defined value */ 60 int (*portkev_callback)(void *, int *, pid_t, int, void *); 61 void *portkev_arg; /* event source callback arg */ 62 struct port *portkev_port; /* associated port */ 63 list_node_t portkev_node; /* pointer to neighbor events */ 64 } port_kevent_t; 65 66 /* portkev_flags */ 67 #define PORT_KEV_PRIVATE 0x01 /* subsystem private, don't free */ 68 #define PORT_KEV_CACHED 0x02 /* port local cached, don't free */ 69 #define PORT_KEV_SCACHED 0x04 /* source local cached, don't free */ 70 #define PORT_KEV_VALID 0x08 /* event associated and enabled */ 71 #define PORT_KEV_DONEQ 0x10 /* event is in done queue */ 72 #define PORT_KEV_FREE 0x20 /* free event and don't copyout it */ 73 #define PORT_KEV_NOSHARE 0x40 /* non-shareable across processes */ 74 75 /* flags : port_alloc_event() */ 76 #define PORT_ALLOC_DEFAULT 0 77 #define PORT_ALLOC_PRIVATE PORT_KEV_PRIVATE 78 #define PORT_ALLOC_CACHED PORT_KEV_CACHED 79 #define PORT_ALLOC_SCACHED PORT_KEV_SCACHED 80 81 /* flags : callback function */ 82 #define PORT_CALLBACK_DEFAULT 0 /* free resources, event delivery */ 83 #define PORT_CALLBACK_CLOSE 1 /* free resources, don't copyout */ 84 #define PORT_CALLBACK_DISSOCIATE 2 /* dissociate object */ 85 86 #define PORT_DEFAULT_PORTS 0x02000 87 #define PORT_MAX_PORTS 0x10000 88 #define PORT_DEFAULT_EVENTS 0x10000 /* default # of events per port */ 89 #define PORT_MAX_EVENTS UINT_MAX/2 /* max. # of events per port */ 90 91 /* 92 * port_source_t represents a source associated with a port. 93 * The portsrc_close() function is required to notify the source when 94 * a port is closed. 95 */ 96 typedef struct port_source { 97 int portsrc_source; 98 int portsrc_cnt; /* # of associations */ 99 void (*portsrc_close)(void *, int, pid_t, int); 100 void *portsrc_closearg; /* callback arg */ 101 struct port_source *portsrc_next; 102 struct port_source *portsrc_prev; 103 } port_source_t; 104 105 106 /* 107 * One cache for each port that uses PORT_SOURCE_FD. 108 * pc_lock must be the first element of port_fdcache_t to keep it 109 * synchronized with the offset of pc_lock in pollcache_t (see pollrelock()). 110 */ 111 typedef struct port_fdcache { 112 kmutex_t pc_lock; /* lock to protect portcache */ 113 kcondvar_t pc_lclosecv; 114 struct portfd **pc_hash; /* points to a hash table of ptrs */ 115 int pc_hashsize; /* the size of current hash table */ 116 int pc_fdcount; /* track how many fd's are hashed */ 117 } port_fdcache_t; 118 119 /* 120 * Structure of port_ksource_tab[] table. 121 * The port_ksource_tab[] is required to allow kernel sources to become 122 * associated with a port at the time of port creation. This feature is 123 * required to avoid performance degradation in sub-systems, specially when 124 * they should need to check the association on every event activity. 125 */ 126 typedef struct port_ksource { 127 int pks_source; 128 void (*pks_close)(void *, int, pid_t, int); 129 void *pks_closearg; 130 void *pks_portsrc; 131 } port_ksource_t; 132 133 /* event port and source management */ 134 int port_associate_ksource(int, int, struct port_source **, 135 void (*)(void *, int, pid_t, int), void *arg, 136 int (*)(port_kevent_t *, int, int, uintptr_t, void *)); 137 int port_dissociate_ksource(int, int, struct port_source *); 138 139 /* event management */ 140 int port_alloc_event(int, int, int, port_kevent_t **); 141 int port_send_event(port_kevent_t *); 142 void port_free_event(port_kevent_t *); 143 void port_init_event(port_kevent_t *, uintptr_t, void *, 144 int (*)(void *, int *, pid_t, int, void *), void *); 145 int port_dup_event(port_kevent_t *, port_kevent_t **, int); 146 int port_associate_fd(struct port *, int, uintptr_t, int, void *); 147 int port_dissociate_fd(struct port *, uintptr_t); 148 149 /* misc functions */ 150 void port_free_event_local(port_kevent_t *, int counter); 151 int port_alloc_event_local(struct port *, int, int, port_kevent_t **); 152 void port_close_pfd(struct portfd *); 153 154 #endif /* _KERNEL */ 155 156 #ifdef __cplusplus 157 } 158 #endif 159 160 #endif /* _SYS_PORT_KERNEL_H */ 161