4 * Implements an architecture independant Capability Service API
6 * $DragonFly: src/sys/sys/caps.h,v 1.6 2004/03/14 11:04:12 hmp Exp $
13 #include <sys/types.h>
15 #ifndef _SYS_MSGPORT_H_
16 #include <sys/msgport.h>
19 typedef enum caps_msg_state {
21 CAPMS_REQUEST_RETRY, /* internal / FUTURE */
23 CAPMS_REPLY_RETRY, /* internal / FUTURE */
27 typedef struct caps_msgid {
29 caps_msg_state_t c_state;
33 typedef enum caps_type {
34 CAPT_UNKNOWN, CAPT_CLIENT, CAPT_SERVICE, CAPT_REMOTE, CAPT_FORKED
37 typedef int64_t caps_gen_t;
40 * Note: upper 16 bits reserved for kernel use
42 #define CAPF_UFLAGS 0xFFFF
43 #define CAPF_USER 0x0001
44 #define CAPF_GROUP 0x0002
45 #define CAPF_WORLD 0x0004
46 #define CAPF_EXCL 0x0008
47 #define CAPF_ANYCLIENT (CAPF_USER|CAPF_GROUP|CAPF_WORLD)
48 #define CAPF_WCRED 0x0010 /* waiting for cred */
49 #define CAPF_NOFORK 0x0020 /* do not create a dummy entry on fork */
50 #define CAPF_WAITSVC 0x0040 /* block if service not available */
51 /* FUTURE: CAPF_ASYNC - support async services */
52 /* FUTURE: CAPF_NOGROUPS - don't bother filling in the groups[] array */
53 /* FUTURE: CAPF_TERM - send termination request to existing service */
54 /* FUTURE: CAPF_TAKE - take over existing service's connections */
55 /* FUTURE: CAPF_DISPOSE_IMM - need immediate dispose wakeups */
60 #define CAPS_ABORT_NOTIMPL 0 /* abort not implemented, no action */
61 #define CAPS_ABORT_RETURNED 1 /* already returned, no action */
62 #define CAPS_ABORT_BEFORESERVER 2 /* caught before the server got it */
63 #define CAPS_ABORT_ATSERVER 3 /* server had retrieved message */
65 #define CAPF_ABORT_HARD 0x0001 /* rip out from under server (3) */
67 #define CAPS_MAXGROUPS 16
68 #define CAPS_MAXNAMELEN 64
69 #define CAPS_MAXINPROG 128
73 typedef struct caps_port {
74 struct lwkt_port cp_lport;
75 int cp_portid; /* caps port id */
76 int cp_upcallid; /* upcall id */
79 typedef struct caps_cred {
86 gid_t groups[CAPS_MAXGROUPS];
89 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
93 TAILQ_HEAD(caps_kmsg_queue, caps_kmsg);
96 * caps_kinfo - Holds a client or service registration
98 * ci_msgpendq: holds the kernel copy of the message after it has been
99 * sent to the local port. The message is matched up against
100 * replies and automatically replied if the owner closes its
103 typedef struct caps_kinfo {
104 struct lwkt_port ci_lport; /* embedded local port */
105 struct caps_kinfo *ci_tdnext; /* per-process list */
106 struct caps_kinfo *ci_hnext; /* registration hash table */
107 struct thread *ci_td; /* owner */
108 struct caps_kmsg_queue ci_msgpendq; /* pending reply (just rcvd) */
109 struct caps_kmsg_queue ci_msguserq; /* pending reply (user holds) */
110 struct caps_kinfo *ci_rcaps; /* connected to remote */
111 int ci_cmsgcount; /* client in-progress msgs */
115 int ci_mrefs; /* message (vmspace) refs */
121 char ci_name[4]; /* variable length */
122 /* ci_name must be last element */
125 /* note: user flags are held in the low 16 bits */
126 #define CAPKF_TDLIST 0x00010000
127 #define CAPKF_HLIST 0x00020000
128 #define CAPKF_FLUSH 0x00040000
129 #define CAPKF_RCAPS 0x00080000
130 #define CAPKF_CLOSED 0x00100000
131 #define CAPKF_MWAIT 0x00200000
134 * Kernel caps message. The kernel keepps track of messagse received,
135 * undergoing processing by the service, and returned. User-supplied data
136 * is copied on reception rather then transmission.
138 typedef struct caps_kmsg {
139 TAILQ_ENTRY(caps_kmsg) km_node;
140 caps_kinfo_t km_mcaps; /* message sender */
141 void *km_umsg; /* mcaps vmspace */
142 int km_umsg_size; /* mcaps vmspace */
143 struct caps_cred km_ccr; /* caps cred for msg */
144 struct caps_msgid km_msgid;
148 #define km_state km_msgid.c_state
150 #define CAPKMF_ONUSERQ 0x0001
151 #define CAPKMF_ONPENDQ 0x0002
152 #define CAPKMF_REPLY 0x0004
153 #define CAPKMF_CDONE 0x0008
154 #define CAPKMF_PEEKED 0x0010
155 #define CAPKMF_ABORTED 0x0020
164 void caps_exit(struct thread *td);
165 void caps_fork(struct proc *p1, struct proc *p2, int flags);
170 * Userland API (libcaps)
172 caps_port_t caps_service(const char *, uid_t, gid_t, mode_t, int);
173 caps_port_t caps_client(const char *, uid_t, gid_t, int);
178 int caps_sys_service(const char *, uid_t, gid_t, int, int);
179 int caps_sys_client(const char *, uid_t, gid_t, int, int);
180 off_t caps_sys_put(int, void *, int);
181 int caps_sys_reply(int, void *, int, off_t);
182 int caps_sys_get(int, void *, int, caps_msgid_t, caps_cred_t);
183 int caps_sys_wait(int, void *, int, caps_msgid_t, caps_cred_t);
184 int caps_sys_abort(int, off_t, int);
185 int caps_sys_setgen(int, caps_gen_t);
186 caps_gen_t caps_sys_getgen(int);