xref: /illumos-gate/usr/src/cmd/fm/fmd/common/fmd_xprt.h (revision cbf75e67)
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 (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 
22 /*
23  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 #ifndef	_FMD_XPRT_H
28 #define	_FMD_XPRT_H
29 
30 
31 #include <pthread.h>
32 #include <libnvpair.h>
33 
34 #ifdef	__cplusplus
35 extern "C" {
36 #endif
37 
38 #include <fmd_module.h>
39 #include <fmd_list.h>
40 
41 struct fmd_eventq;			/* see <fmd_eventq.h> */
42 struct fmd_thread;			/* see <fmd_thread.h> */
43 struct fmd_idspace;			/* see <fmd_idspace.h> */
44 struct fmd_log;				/* see <fmd_log.h> */
45 
46 struct fmd_xprt_impl;			/* see below */
47 
48 typedef void fmd_xprt_rule_f(struct fmd_xprt_impl *, nvlist_t *);
49 
50 extern fmd_xprt_rule_f fmd_xprt_event_syn;
51 extern fmd_xprt_rule_f fmd_xprt_event_ack;
52 extern fmd_xprt_rule_f fmd_xprt_event_run;
53 extern fmd_xprt_rule_f fmd_xprt_event_sub;
54 extern fmd_xprt_rule_f fmd_xprt_event_unsub;
55 extern fmd_xprt_rule_f fmd_xprt_event_unsuback;
56 extern fmd_xprt_rule_f fmd_xprt_event_uuclose;
57 extern fmd_xprt_rule_f fmd_xprt_event_error;
58 extern fmd_xprt_rule_f fmd_xprt_event_drop;
59 extern fmd_xprt_rule_f fmd_xprt_event_uuresolved;
60 extern fmd_xprt_rule_f fmd_xprt_event_updated;
61 
62 typedef struct fmd_xprt_rule {
63 	const char *xr_class;		/* pattern to match */
64 	fmd_xprt_rule_f *xr_func;	/* action to invoke */
65 } fmd_xprt_rule_t;
66 
67 extern const fmd_xprt_rule_t _fmd_xprt_state_syn[];
68 extern const fmd_xprt_rule_t _fmd_xprt_state_ack[];
69 extern const fmd_xprt_rule_t _fmd_xprt_state_err[];
70 extern const fmd_xprt_rule_t _fmd_xprt_state_sub[];
71 extern const fmd_xprt_rule_t _fmd_xprt_state_run[];
72 
73 typedef struct fmd_xprt_stat {
74 	fmd_eventqstat_t xs_evqstat;	/* statistics for xprt event queue */
75 	fmd_stat_t xs_module;		/* module name associated with xprt */
76 	fmd_stat_t xs_authority;	/* authority associated with xprt */
77 	fmd_stat_t xs_state;		/* state name associated with xprt */
78 	fmd_stat_t xs_received;		/* number of events received by xprt */
79 	fmd_stat_t xs_discarded;	/* number of events discarded by xprt */
80 	fmd_stat_t xs_retried;		/* number of events retried by xprt */
81 	fmd_stat_t xs_replayed;		/* number of events replayed by xprt */
82 	fmd_stat_t xs_lost;		/* number of events lost by xprt */
83 	fmd_stat_t xs_timeouts;		/* number of events recv'd with ttl=0 */
84 	fmd_stat_t xs_subscriptions;	/* number of active subscriptions */
85 } fmd_xprt_stat_t;
86 
87 typedef struct fmd_xprt_class {
88 	char *xc_class;			/* class string for subscription */
89 	uint_t xc_refs;			/* reference count for subscription */
90 	struct fmd_xprt_class *xc_next;	/* next class on xi_subhash chain */
91 } fmd_xprt_class_t;
92 
93 typedef struct fmd_xprt_class_hash {
94 	fmd_eventq_t *xch_queue;	/* associated event queue (or NULL) */
95 	fmd_xprt_class_t **xch_hash;	/* subscription hash bucket array */
96 	uint_t xch_hashlen;		/* size of xch_hash bucket array */
97 } fmd_xprt_class_hash_t;
98 
99 typedef struct fmd_xprt_impl {
100 	fmd_list_t xi_list;		/* linked list next/prev pointers */
101 	uint_t xi_version;		/* transport protocol version */
102 	uint_t xi_id;			/* transport identifier */
103 	struct fmd_eventq *xi_queue;	/* event queue for outbound events */
104 	struct fmd_thread *xi_thread;	/* thread associated with transport */
105 	const fmd_xprt_rule_t *xi_state; /* rules for the current state */
106 	nvlist_t *xi_auth;		/* authority for peer endpoint */
107 	void *xi_data;			/* data for xprt_get/setspecific */
108 	struct fmd_log *xi_log;		/* log for received events (optional) */
109 	pthread_mutex_t xi_stats_lock;	/* lock protecting xi_stats data */
110 	fmd_xprt_stat_t *xi_stats;	/* built-in per-transport statistics */
111 	pthread_mutex_t xi_lock;	/* lock for modifying members below */
112 	pthread_cond_t xi_cv;		/* condition variable for xi_flags */
113 	uint_t xi_flags;		/* flags (see below) */
114 	uint_t xi_busy;			/* active threads in xprt_recv() */
115 	fmd_xprt_class_hash_t xi_lsub;	/* subscriptions in local dispq */
116 	fmd_xprt_class_hash_t xi_rsub;	/* subscriptions in remote peer */
117 	fmd_xprt_class_hash_t xi_usub;	/* pending remote unsubscriptions */
118 } fmd_xprt_impl_t;
119 
120 /*
121  * Flags for fmd_xprt_create() and xi_flags.  NOTE: Any public API flags must
122  * exactly match the corresponding definitions in <fmd_api.h>.
123  */
124 #define	FMD_XPRT_RDONLY		0x1	/* xprt is read-only */
125 #define	FMD_XPRT_RDWR		0x3	/* xprt is read-write */
126 #define	FMD_XPRT_ACCEPT		0x4	/* xprt is accepting connection */
127 #define	FMD_XPRT_SUSPENDED	0x8	/* xprt is suspended by user */
128 #define	FMD_XPRT_SUBSCRIBER	0x10	/* xprt is actively subscribing */
129 #define	FMD_XPRT_ISUSPENDED	0x20	/* xprt is waiting for _fmd_init */
130 #define	FMD_XPRT_DSUSPENDED	0x40	/* xprt is suspended by fmd mechanism */
131 #define	FMD_XPRT_EXTERNAL	0x80	/* xprt is external to a chassis */
132 #define	FMD_XPRT_NO_REMOTE_REPAIR 0x100	/* xprt allows remote repair */
133 #define	FMD_XPRT_CACHE_AS_LOCAL 0x200	/* xprt caches fault as if local */
134 #define	FMD_XPRT_HCONLY		0x400	/* xprt only proxies hc-scheme faults */
135 #define	FMD_XPRT_HC_PRESENT_ONLY 0x800	/* only locally present hc faults */
136 
137 #define	FMD_XPRT_CMASK /* xprt create flag mask */ \
138 	(FMD_XPRT_RDWR | FMD_XPRT_ACCEPT | FMD_XPRT_SUSPENDED | \
139 	FMD_XPRT_EXTERNAL | FMD_XPRT_NO_REMOTE_REPAIR | \
140 	FMD_XPRT_CACHE_AS_LOCAL | FMD_XPRT_HCONLY | FMD_XPRT_HC_PRESENT_ONLY)
141 #define	FMD_XPRT_SMASK	\
142 	(FMD_XPRT_SUSPENDED | FMD_XPRT_ISUSPENDED | FMD_XPRT_DSUSPENDED)
143 
144 extern fmd_xprt_t *fmd_xprt_create(fmd_module_t *, uint_t, nvlist_t *, void *);
145 extern void fmd_xprt_destroy(fmd_xprt_t *);
146 extern void fmd_xprt_xsuspend(fmd_xprt_t *, uint_t);
147 extern void fmd_xprt_xresume(fmd_xprt_t *, uint_t);
148 extern void fmd_xprt_send(fmd_xprt_t *);
149 extern void fmd_xprt_recv(fmd_xprt_t *, nvlist_t *, hrtime_t, boolean_t);
150 extern void fmd_xprt_uuclose(fmd_xprt_t *, const char *);
151 extern void fmd_xprt_uuresolved(fmd_xprt_t *, const char *);
152 extern void fmd_xprt_updated(fmd_xprt_t *, const char *, uint8_t *, uint8_t *,
153     uint_t);
154 
155 extern void fmd_xprt_subscribe(fmd_xprt_t *, const char *);
156 extern void fmd_xprt_unsubscribe(fmd_xprt_t *, const char *);
157 extern void fmd_xprt_subscribe_all(const char *);
158 extern void fmd_xprt_unsubscribe_all(const char *);
159 extern void fmd_xprt_suspend_all(void);
160 extern void fmd_xprt_resume_all(void);
161 
162 #ifdef	__cplusplus
163 }
164 #endif
165 
166 #endif	/* _FMD_XPRT_H */
167