1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* 23*0Sstevel@tonic-gate * Copyright 2003 Sun Microsystems, Inc. All rights reserved. 24*0Sstevel@tonic-gate * Use is subject to license terms. 25*0Sstevel@tonic-gate */ 26*0Sstevel@tonic-gate 27*0Sstevel@tonic-gate #ifndef _SYS_LOGINDMUX_IMPL_H 28*0Sstevel@tonic-gate #define _SYS_LOGINDMUX_IMPL_H 29*0Sstevel@tonic-gate 30*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 31*0Sstevel@tonic-gate 32*0Sstevel@tonic-gate #include <sys/types.h> 33*0Sstevel@tonic-gate #include <sys/stream.h> 34*0Sstevel@tonic-gate 35*0Sstevel@tonic-gate #ifdef __cplusplus 36*0Sstevel@tonic-gate extern "C" { 37*0Sstevel@tonic-gate #endif 38*0Sstevel@tonic-gate 39*0Sstevel@tonic-gate 40*0Sstevel@tonic-gate /* 41*0Sstevel@tonic-gate * This structure is shared between two logindmux peer instances and 42*0Sstevel@tonic-gate * ensures that only one of the peers will be actively processing an 43*0Sstevel@tonic-gate * I_UNLINK ioctl at any one time. 44*0Sstevel@tonic-gate */ 45*0Sstevel@tonic-gate typedef struct unlinkinfo { 46*0Sstevel@tonic-gate kmutex_t state_lock; /* serialize access to state */ 47*0Sstevel@tonic-gate int state; /* state of I_UNLINK operation */ 48*0Sstevel@tonic-gate mblk_t *prot_mp; /* carries protocol messages */ 49*0Sstevel@tonic-gate } unlinkinfo_t; 50*0Sstevel@tonic-gate 51*0Sstevel@tonic-gate /* 52*0Sstevel@tonic-gate * Logindmux state structure; one per open instance. 53*0Sstevel@tonic-gate */ 54*0Sstevel@tonic-gate struct tmx { 55*0Sstevel@tonic-gate queue_t *rdq; /* our mux upper read queue */ 56*0Sstevel@tonic-gate queue_t *muxq; /* our mux lower write queue */ 57*0Sstevel@tonic-gate queue_t *peerq; /* peer mux lower write queue */ 58*0Sstevel@tonic-gate minor_t dev0; /* our minor device number */ 59*0Sstevel@tonic-gate boolean_t isptm; /* true if ptm is downstream */ 60*0Sstevel@tonic-gate mblk_t *unlink_mp; /* mblk used in logdmux_unlink_timer */ 61*0Sstevel@tonic-gate unlinkinfo_t *unlinkinfop; /* used during I_UNLINK processing */ 62*0Sstevel@tonic-gate bufcall_id_t wbufcid; /* needed for recovery */ 63*0Sstevel@tonic-gate bufcall_id_t rbufcid; /* needed for recovery */ 64*0Sstevel@tonic-gate timeout_id_t utimoutid; /* unlink timer identifier */ 65*0Sstevel@tonic-gate timeout_id_t wtimoutid; /* needed for recovery */ 66*0Sstevel@tonic-gate timeout_id_t rtimoutid; /* needed for recovery */ 67*0Sstevel@tonic-gate }; 68*0Sstevel@tonic-gate 69*0Sstevel@tonic-gate #define LOGDMX_ID 107 /* module id number */ 70*0Sstevel@tonic-gate 71*0Sstevel@tonic-gate /* 72*0Sstevel@tonic-gate * The arguments for calls to qtimeout, in microseconds. 73*0Sstevel@tonic-gate */ 74*0Sstevel@tonic-gate #define SIMWAIT 100000 /* logdmux_timer */ 75*0Sstevel@tonic-gate #define LOGDMUX_POLL_WAIT 10 /* logdmux_unlink_timer */ 76*0Sstevel@tonic-gate 77*0Sstevel@tonic-gate /* 78*0Sstevel@tonic-gate * State of peer linkage. 79*0Sstevel@tonic-gate */ 80*0Sstevel@tonic-gate enum { 81*0Sstevel@tonic-gate LOGDMUX_LINKED = 1, /* peer instances are in linked state */ 82*0Sstevel@tonic-gate LOGDMUX_UNLINK_PENDING = 2, /* a peer is actively I_UNLINKing */ 83*0Sstevel@tonic-gate LOGDMUX_UNLINKED = 3 /* a peer has completed its I_UNLINK */ 84*0Sstevel@tonic-gate }; 85*0Sstevel@tonic-gate 86*0Sstevel@tonic-gate /* 87*0Sstevel@tonic-gate * Protocol message magic cookie. 88*0Sstevel@tonic-gate */ 89*0Sstevel@tonic-gate #define LOGDMUX_MCTL (LOGDMX_ID << 16) 90*0Sstevel@tonic-gate 91*0Sstevel@tonic-gate /* 92*0Sstevel@tonic-gate * peer to peer protocol messages. 93*0Sstevel@tonic-gate */ 94*0Sstevel@tonic-gate #define LOGDMUX_UNLINK_REQ (LOGDMUX_MCTL|1) /* peer wants to unlink */ 95*0Sstevel@tonic-gate #define LOGDMUX_UNLINK_RESP (LOGDMUX_MCTL|2) /* ok for peer to unlink */ 96*0Sstevel@tonic-gate 97*0Sstevel@tonic-gate /* 98*0Sstevel@tonic-gate * Macro to determine if an mblk is a logindmux protocol mblk. 99*0Sstevel@tonic-gate */ 100*0Sstevel@tonic-gate #define LOGDMUX_PROTO_MBLK(mp) \ 101*0Sstevel@tonic-gate ((DB_TYPE(mp) == M_CTL) && \ 102*0Sstevel@tonic-gate ((mp)->b_cont != NULL) && \ 103*0Sstevel@tonic-gate (DB_TYPE((mp)->b_cont) == M_IOCTL) && \ 104*0Sstevel@tonic-gate (((struct iocblk *)((mp)->b_cont->b_rptr))->ioc_cmd == I_UNLINK)) 105*0Sstevel@tonic-gate 106*0Sstevel@tonic-gate 107*0Sstevel@tonic-gate #ifdef __cplusplus 108*0Sstevel@tonic-gate } 109*0Sstevel@tonic-gate #endif 110*0Sstevel@tonic-gate 111*0Sstevel@tonic-gate #endif /* _SYS_LOGINDMUX_IMPL_H */ 112