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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (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 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* Multithreaded STREAMS Local Transport Provider.
*
* OVERVIEW
* ========
*
* This driver provides TLI as well as socket semantics. It provides
* connectionless, connection oriented, and connection oriented with orderly
* release transports for TLI and sockets. Each transport type has separate name
* spaces (i.e. it is not possible to connect from a socket to a TLI endpoint) -
* this removes any name space conflicts when binding to socket style transport
* addresses.
*
* NOTE: There is one exception: Socket ticots and ticotsord transports share
* the same namespace. In fact, sockets always use ticotsord type transport.
*
* The driver mode is specified during open() by the minor number used for
* open.
*
* The sockets in addition have the following semantic differences:
* No support for passing up credentials (TL_SET[U]CRED).
*
* Options are passed through transparently on T_CONN_REQ to T_CONN_IND,
* from T_UNITDATA_REQ to T_UNIDATA_IND, and from T_OPTDATA_REQ to
* T_OPTDATA_IND.
*
* The T_CONN_CON is generated when processing the T_CONN_REQ i.e. before
* a T_CONN_RES is received from the acceptor. This means that a socket
* connect will complete before the peer has called accept.
*
*
* MULTITHREADING
* ==============
*
* The driver does not use STREAMS protection mechanisms. Instead it uses a
* generic "serializer" abstraction. Most of the operations are executed behind
* the serializer and are, essentially single-threaded. All functions executed
* behind the same serializer are strictly serialized. So if one thread calls
* serializer_enter(serializer, foo, mp1, arg1); and another thread calls
* serializer_enter(serializer, bar, mp2, arg1); then (depending on which one
* was called) the actual sequence will be foo(mp1, arg1); bar(mp1, arg2) or
* bar(mp1, arg2); foo(mp1, arg1); But foo() and bar() will never run at the
* same time.
*
* Connectionless transport use a single serializer per transport type (one for
* TLI and one for sockets. Connection-oriented transports use finer-grained
* serializers.
*
* All COTS-type endpoints start their life with private serializers. During
* connection request processing the endpoint serializer is switched to the
* listener's serializer and the rest of T_CONN_REQ processing is done on the
* listener serializer. During T_CONN_RES processing the eager serializer is
* switched from listener to acceptor serializer and after that point all
* processing for eager and acceptor happens on this serializer. To avoid races
* with endpoint closes while its serializer may be changing closes are blocked
* while serializers are manipulated.
*
* References accounting
* ---------------------
*
* Endpoints are reference counted and freed when the last reference is
* dropped. Functions within the serializer may access an endpoint state even
* after an endpoint closed. The te_closing being set on the endpoint indicates
* that the endpoint entered its close routine.
*
* One reference is held for each opened endpoint instance. The reference
* counter is incremented when the endpoint is linked to another endpoint and
* decremented when the link disappears. It is also incremented when the
* endpoint is found by the hash table lookup. This increment is atomic with the
* lookup itself and happens while the hash table read lock is held.
*
* Close synchronization
* ---------------------
*
* During close the endpoint as marked as closing using te_closing flag. It is
* usually enough to check for te_closing flag since all other state changes
* happen after this flag is set and the close entered serializer. Immediately
* after setting te_closing flag tl_close() enters serializer and waits until
* the callback finishes. This allows all functions called within serializer to
* simply check te_closing without any locks.
*
* Serializer management.
* ---------------------
*
* For COTS transports serializers are created when the endpoint is constructed
* and destroyed when the endpoint is destructed. CLTS transports use global
* serializers - one for sockets and one for TLI.
*
* COTS serializers have separate reference counts to deal with several
* endpoints sharing the same serializer. There is a subtle problem related to
* the serializer destruction. The serializer should never be destroyed by any
* function executed inside serializer. This means that close has to wait till
* all serializer activity for this endpoint is finished before it can drop the
* last reference on the endpoint (which may as well free the serializer). This
* is only relevant for COTS transports which manage serializers
* dynamically. For CLTS transports close may complete without waiting for all
* serializer activity to finish since serializer is only destroyed at driver
* detach time.
*
* COTS endpoints keep track of the number of outstanding requests on the
* serializer for the endpoint. The code handling accept() avoids changing
* client serializer if it has any pending messages on the serializer and
* instead moves acceptor to listener's serializer.
*
*
* Use of hash tables
* ------------------
*
* The driver uses modhash hash table implementation. Each transport uses two
* hash tables - one for finding endpoints by acceptor ID and another one for
* finding endpoints by address. For sockets TICOTS and TICOTSORD share the same
* pair of hash tables since sockets only use TICOTSORD.
*
* All hash tables lookups increment a reference count for returned endpoints,
* so we may safely check the endpoint state even when the endpoint is removed
* from the hash by another thread immediately after it is found.
*
*
* CLOSE processing
* ================
*
* The driver enters serializer twice on close(). The close sequence is the
* following:
*
* 1) Wait until closing is safe (te_closewait becomes zero)
* This step is needed to prevent close during serializer switches. In most
* cases (close happening after connection establishment) te_closewait is
* zero.
* 1) Set te_closing.
* 2) Call tl_close_ser() within serializer and wait for it to complete.
*
* te_close_ser simply marks endpoint and wakes up waiting tl_close().
* It also needs to clear write-side q_next pointers - this should be done
* before qprocsoff().
*
* This synchronous serializer entry during close is needed to ensure that
* the queue is valid everywhere inside the serializer.
*
* Note that in many cases close will execute tl_close_ser() synchronously,
* so it will not wait at all.
*
* 3) Calls qprocsoff().
* 4) Calls tl_close_finish_ser() within the serializer and waits for it to
* complete (for COTS transports). For CLTS transport there is no wait.
*
* tl_close_finish_ser() Finishes the close process and wakes up waiting
* close if there is any.
*
* Note that in most cases close will enter te_close_ser_finish()
* synchronously and will not wait at all.
*
*
* Flow Control
* ============
*
* The driver implements both read and write side service routines. No one calls
* putq() on the read queue. The read side service routine tl_rsrv() is called
* when the read side stream is back-enabled. It enters serializer synchronously
* (waits till serializer processing is complete). Within serializer it
* back-enables all endpoints blocked by the queue for connection-less
* transports and enables write side service processing for the peer for
* connection-oriented transports.
*
* Read and write side service routines use special mblk_sized space in the
* endpoint structure to enter perimeter.
*
* Write-side flow control
* -----------------------
*
* Write side flow control is a bit tricky. The driver needs to deal with two
* message queues - the explicit STREAMS message queue maintained by
* putq()/getq()/putbq() and the implicit queue within the serializer. These two
* queues should be synchronized to preserve message ordering and should
* maintain a single order determined by the order in which messages enter
* tl_wput(). In order to maintain the ordering between these two queues the
* STREAMS queue is only manipulated within the serializer, so the ordering is
* provided by the serializer.
*
* Functions called from the tl_wsrv() sometimes may call putbq(). To
* immediately stop any further processing of the STREAMS message queues the
* code calling putbq() also sets the te_nowsrv flag in the endpoint. The write
* side service processing stops when the flag is set.
*
* The tl_wsrv() function enters serializer synchronously and waits for it to
* complete. The serializer call-back tl_wsrv_ser() either drains all messages
* on the STREAMS queue or terminates when it notices the te_nowsrv flag
* set. Note that the maximum amount of messages processed by tl_wput_ser() is
* always bounded by the amount of messages on the STREAMS queue at the time
* tl_wsrv_ser() is entered. Any new messages may only appear on the STREAMS
* queue from another serialized entry which can't happen in parallel. This
* guarantees that tl_wput_ser() is complete in bounded time (there is no risk
* of it draining forever while writer places new messages on the STREAMS
* queue).
*
* Note that a closing endpoint never sets te_nowsrv and never calls putbq().
*
*
* Unix Domain Sockets
* ===================
*
* The driver knows the structure of Unix Domain sockets addresses and treats
* them differently from generic TLI addresses. For sockets implicit binds are
* requested by setting SOU_MAGIC_IMPLICIT in the soua_magic part of the address
* instead of using address length of zero. Explicit binds specify
* SOU_MAGIC_EXPLICIT as magic.
*
* For implicit binds we always use minor number as soua_vp part of the address
* and avoid any hash table lookups. This saves two hash tables lookups per
* anonymous bind.
*
* For explicit address we hash the vnode pointer instead of hashing the
* full-scale address+zone+length. Hashing by pointer is more efficient then
* hashing by the full address.
*
* For unix domain sockets the te_ap is always pointing to te_uxaddr part of the
* tep structure, so it should be never freed.
*
* Also for sockets the driver always uses minor number as acceptor id.
*
* TPI VIOLATIONS
* --------------
*
* This driver violates TPI in several respects for Unix Domain Sockets:
*
* 1) It treats O_T_BIND_REQ as T_BIND_REQ and refuses bind if an explicit bind
* is requested and the endpoint is already in use. There is no point in
* generating an unused address since this address will be rejected by
* sockfs anyway. For implicit binds it always generates a new address
* (sets soua_vp to its minor number).
*
* 2) It always uses minor number as acceptor ID and never uses queue
* pointer. It is ok since sockets get acceptor ID from T_CAPABILITY_REQ
* message and they do not use the queue pointer.
*
* 3) For Listener sockets the usual sequence is to issue bind() zero backlog
* followed by listen(). The listen() should be issued with non-zero
* backlog, so sotpi_listen() issues unbind request followed by bind
* request to the same address but with a non-zero qlen value. Both
* tl_bind() and tl_unbind() require write lock on the hash table to
* insert/remove the address. The driver does not remove the address from
* the hash for endpoints that are bound to the explicit address and have
* backlog of zero. During T_BIND_REQ processing if the address requested
* is equal to the address the endpoint already has it updates the backlog
* without reinserting the address in the hash table. This optimization
* avoids two hash table updates for each listener created. It always
* avoids the problem of a "stolen" address when another listener may use
* the same address between the unbind and bind and suddenly listen() fails
* because address is in use even though the bind() succeeded.
*
*
* CONNECTIONLESS TRANSPORTS
* =========================
*
* Connectionless transports all share the same serializer (one for TLI and one
* for Sockets). Functions executing behind serializer can check or modify state
* of any endpoint.
*
* When endpoint X talks to another endpoint Y it caches the pointer to Y in the
* te_lastep field. The next time X talks to some address A it checks whether A
* is the same as Y's address and if it is there is no need to lookup Y. If the
* address is different or the state of Y is not appropriate (e.g. closed or not
* idle) X does a lookup using tl_find_peer() and caches the new address.
* NOTE: tl_find_peer() never returns closing endpoint and it places a refhold
* on the endpoint found.
*
* During close of endpoint Y it doesn't try to remove itself from other
* endpoints caches. They will detect that Y is gone and will search the peer
* endpoint again.
*
* Flow Control Handling.
* ----------------------
*
* Each connectionless endpoint keeps a list of endpoints which are
* flow-controlled by its queue. It also keeps a pointer to the queue which
* flow-controls itself. Whenever flow control releases for endpoint X it
* enables all queues from the list. During close it also back-enables everyone
* in the list. If X is flow-controlled when it is closing it removes it from
* the peers list.
*
* DATA STRUCTURES
* ===============
*
* Each endpoint is represented by the tl_endpt_t structure which keeps all the
* endpoint state. For connection-oriented transports it has a keeps a list
* of pending connections (tl_icon_t). For connectionless transports it keeps a
* list of endpoints flow controlled by this one.
*
* Each transport type is represented by a per-transport data structure
* tl_transport_state_t. It contains a pointer to an acceptor ID hash and the
* endpoint address hash tables for each transport. It also contains pointer to
* transport serializer for connectionless transports.
*
* Each endpoint keeps a link to its transport structure, so the code can find
* all per-transport information quickly.
*/
#include <sys/types.h>
#include <sys/inttypes.h>
#include <sys/stream.h>
#include <sys/stropts.h>
#define _SUN_TPI_VERSION 2
#include <sys/tihdr.h>
#include <sys/strlog.h>
#include <sys/debug.h>
#include <sys/cred.h>
#include <sys/errno.h>
#include <sys/kmem.h>
#include <sys/id_space.h>
#include <sys/modhash.h>
#include <sys/mkdev.h>
#include <sys/tl.h>
#include <sys/stat.h>
#include <sys/conf.h>
#include <sys/modctl.h>
#include <sys/strsun.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/sysmacros.h>
#include <sys/xti_xtiopt.h>
#include <sys/ddi.h>
#include <sys/sunddi.h>
#include <sys/zone.h>
#include <inet/common.h> /* typedef int (*pfi_t)() for inet/optcom.h */
#include <inet/optcom.h>
#include <sys/strsubr.h>
#include <sys/ucred.h>
#include <sys/suntpi.h>
#include <sys/list.h>
#include <sys/serializer.h>
/*
* TBD List
* 14 Eliminate state changes through table
* 16. AF_UNIX socket options
* 17. connect() for ticlts
* 18. support for "netstat" to show AF_UNIX plus TLI local
* transport connections
* 21. sanity check to flushing on sending M_ERROR
*/
/*
* CONSTANT DECLARATIONS
* --------------------
*/
/*
* Local declarations
*/
#define NEXTSTATE(EV, ST) ti_statetbl[EV][ST]
#define BADSEQNUM (-1) /* initial seq number used by T_DISCON_IND */
#define TL_BUFWAIT (10000) /* usecs to wait for allocb buffer timeout */
#define TL_TIDUSZ (64*1024) /* tidu size when "strmsgz" is unlimited (0) */
/*
* Hash tables size.
*/
#define TL_HASH_SIZE 311
/*
* Definitions for module_info
*/
#define TL_ID (104) /* module ID number */
#define TL_NAME "tl" /* module name */
#define TL_MINPSZ (0) /* min packet size */
#define TL_MAXPSZ INFPSZ /* max packet size ZZZ */
#define TL_HIWAT (16*1024) /* hi water mark */
#define TL_LOWAT (256) /* lo water mark */
/*
* Definition of minor numbers/modes for new transport provider modes.
* We view the socket use as a separate mode to get a separate name space.
*/
#define TL_TICOTS 0 /* connection oriented transport */
#define TL_TICOTSORD 1 /* COTS w/ orderly release */
#define TL_TICLTS 2 /* connectionless transport */
#define TL_UNUSED 3
#define TL_SOCKET 4 /* Socket */
#define TL_SOCK_COTS (TL_SOCKET|TL_TICOTS)
#define TL_SOCK_COTSORD (TL_SOCKET|TL_TICOTSORD)
#define TL_SOCK_CLTS (TL_SOCKET|TL_TICLTS)
#define TL_MINOR_MASK 0x7
#define TL_MINOR_START (TL_TICLTS + 1)
/*
* LOCAL MACROS
*/
#define T_ALIGN(p) P2ROUNDUP((p), sizeof (t_scalar_t))
/*
* EXTERNAL VARIABLE DECLARATIONS
* -----------------------------
*/
/*
* state table defined in the OS space.c
*/
extern char ti_statetbl[TE_NOEVENTS][TS_NOSTATES];
/*
* STREAMS DRIVER ENTRY POINTS PROTOTYPES
*/
static int tl_open(queue_t *, dev_t *, int, int, cred_t *);
static int tl_close(queue_t *, int, cred_t *);
static void tl_wput(queue_t *, mblk_t *);
static void tl_wsrv(queue_t *);
static void tl_rsrv(queue_t *);
static int tl_attach(dev_info_t *, ddi_attach_cmd_t);
static int tl_detach(dev_info_t *, ddi_detach_cmd_t);
static int tl_info(dev_info_t *, ddi_info_cmd_t, void *, void **);
/*
* GLOBAL DATA STRUCTURES AND VARIABLES
* -----------------------------------
*/
/*
* Table representing database of all options managed by T_SVR4_OPTMGMT_REQ
* For now, we only manage the SO_RECVUCRED option but we also have
* harmless dummy options to make things work with some common code we access.
*/
opdes_t tl_opt_arr[] = {
/* The SO_TYPE is needed for the hack below */
{
SO_TYPE,
SOL_SOCKET,
OA_R,
OA_R,
OP_NP,
0,
sizeof (t_scalar_t),
0
},
{
SO_RECVUCRED,
SOL_SOCKET,
OA_RW,
OA_RW,
OP_NP,
0,
sizeof (int),
0
}
};
/*
* Table of all supported levels
* Note: Some levels (e.g. XTI_GENERIC) may be valid but may not have
* any supported options so we need this info separately.
*
* This is needed only for topmost tpi providers.
*/
optlevel_t tl_valid_levels_arr[] = {
XTI_GENERIC,
SOL_SOCKET,
TL_PROT_LEVEL
};
#define TL_VALID_LEVELS_CNT A_CNT(tl_valid_levels_arr)
/*
* Current upper bound on the amount of space needed to return all options.
* Additional options with data size of sizeof(long) are handled automatically.
* Others need hand job.
*/
#define TL_MAX_OPT_BUF_LEN \
((A_CNT(tl_opt_arr) << 2) + \
(A_CNT(tl_opt_arr) * sizeof (struct opthdr)) + \
+ 64 + sizeof (struct T_optmgmt_ack))
#define TL_OPT_ARR_CNT A_CNT(tl_opt_arr)
/*
* transport addr structure
*/
typedef struct tl_addr {
zoneid_t ta_zoneid; /* Zone scope of address */
t_scalar_t ta_alen; /* length of abuf */
void *ta_abuf; /* the addr itself */
} tl_addr_t;
/*
* Refcounted version of serializer.
*/
typedef struct tl_serializer {
uint_t ts_refcnt;
serializer_t *ts_serializer;
} tl_serializer_t;
/*
* Each transport type has a separate state.
* Per-transport state.
*/
typedef struct tl_transport_state {
char *tr_name;
minor_t tr_minor;
uint32_t tr_defaddr;
mod_hash_t *tr_ai_hash;
mod_hash_t *tr_addr_hash;
tl_serializer_t *tr_serializer;
} tl_transport_state_t;
#define TL_DFADDR 0x1000
static tl_transport_state_t tl_transports[] = {
{ "ticots", TL_TICOTS, TL_DFADDR, NULL, NULL, NULL },
{ "ticotsord", TL_TICOTSORD, TL_DFADDR, NULL, NULL, NULL },
{ "ticlts", TL_TICLTS, TL_DFADDR, NULL, NULL, NULL },
{ "undefined", TL_UNUSED, TL_DFADDR, NULL, NULL, NULL },
{ "sticots", TL_SOCK_COTS, TL_DFADDR, NULL, NULL, NULL },
{ "sticotsord", TL_SOCK_COTSORD, TL_DFADDR, NULL, NULL },
{ "sticlts", TL_SOCK_CLTS, TL_DFADDR, NULL, NULL, NULL }
};
#define TL_MAXTRANSPORT A_CNT(tl_transports)
struct tl_endpt;
typedef struct tl_endpt tl_endpt_t;
typedef void (tlproc_t)(mblk_t *, tl_endpt_t *);
/*
* Data structure used to represent pending connects.
* Records enough information so that the connecting peer can close
* before the connection gets accepted.
*/
typedef struct tl_icon {
list_node_t ti_node;
struct tl_endpt *ti_tep; /* NULL if peer has already closed */
mblk_t *ti_mp; /* b_next list of data + ordrel_ind */
t_scalar_t ti_seqno; /* Sequence number */
} tl_icon_t;
typedef struct so_ux_addr soux_addr_t;
#define TL_SOUX_ADDRLEN sizeof (soux_addr_t)
/*
* Maximum number of unaccepted connection indications allowed per listener.
*/
#define TL_MAXQLEN 4096
int tl_maxqlen = TL_MAXQLEN;
/*
* transport endpoint structure
*/
struct tl_endpt {
queue_t *te_rq; /* stream read queue */
queue_t *te_wq; /* stream write queue */
uint32_t te_refcnt;
int32_t te_state; /* TPI state of endpoint */
minor_t te_minor; /* minor number */
#define te_seqno te_minor
uint_t te_flag; /* flag field */
boolean_t te_nowsrv;
tl_serializer_t *te_ser; /* Serializer to use */
#define te_serializer te_ser->ts_serializer
soux_addr_t te_uxaddr; /* Socket address */
#define te_magic te_uxaddr.soua_magic
#define te_vp te_uxaddr.soua_vp
tl_addr_t te_ap; /* addr bound to this endpt */
#define te_zoneid te_ap.ta_zoneid
#define te_alen te_ap.ta_alen
#define te_abuf te_ap.ta_abuf
tl_transport_state_t *te_transport;
#define te_addrhash te_transport->tr_addr_hash
#define te_aihash te_transport->tr_ai_hash
#define te_defaddr te_transport->tr_defaddr
cred_t *te_credp; /* endpoint user credentials */
mod_hash_hndl_t te_hash_hndl; /* Handle for address hash */
/*
* State specific for connection-oriented and connectionless transports.
*/
union {
/* Connection-oriented state. */
struct {
t_uscalar_t _te_nicon; /* count of conn requests */
t_uscalar_t _te_qlen; /* max conn requests */
tl_endpt_t *_te_oconp; /* conn request pending */
tl_endpt_t *_te_conp; /* connected endpt */
#ifndef _ILP32
void *_te_pad;
#endif
list_t _te_iconp; /* list of conn ind. pending */
} _te_cots_state;
/* Connection-less state. */
struct {
tl_endpt_t *_te_lastep; /* last dest. endpoint */
tl_endpt_t *_te_flowq; /* flow controlled on whom */
list_node_t _te_flows; /* lists of connections */
list_t _te_flowlist; /* Who flowcontrols on me */
} _te_clts_state;
} _te_transport_state;
#define te_nicon _te_transport_state._te_cots_state._te_nicon
#define te_qlen _te_transport_state._te_cots_state._te_qlen
#define te_oconp _te_transport_state._te_cots_state._te_oconp
#define te_conp _te_transport_state._te_cots_state._te_conp
#define te_iconp _te_transport_state._te_cots_state._te_iconp
#define te_lastep _te_transport_state._te_clts_state._te_lastep
#define te_flowq _te_transport_state._te_clts_state._te_flowq
#define te_flowlist _te_transport_state._te_clts_state._te_flowlist
#define te_flows _te_transport_state._te_clts_state._te_flows
bufcall_id_t te_bufcid; /* outstanding bufcall id */
timeout_id_t te_timoutid; /* outstanding timeout id */
pid_t te_cpid; /* cached pid of endpoint */
t_uscalar_t te_acceptor_id; /* acceptor id for T_CONN_RES */
/*
* Pieces of the endpoint state needed for closing.
*/
kmutex_t te_closelock;
kcondvar_t te_closecv;
uint8_t te_closing; /* The endpoint started closing */
uint8_t te_closewait; /* Wait in close until zero */
mblk_t te_closemp; /* for entering serializer on close */
mblk_t te_rsrvmp; /* for entering serializer on rsrv */
mblk_t te_wsrvmp; /* for entering serializer on wsrv */
kmutex_t te_srv_lock;
kcondvar_t te_srv_cv;
uint8_t te_rsrv_active; /* Running in tl_rsrv() */
uint8_t te_wsrv_active; /* Running in tl_wsrv() */
/*
* Pieces of the endpoint state needed for serializer transitions.
*/
kmutex_t te_ser_lock; /* Protects the count below */
uint_t te_ser_count; /* Number of messages on serializer */
};
/*
* Flag values. Lower 4 bits specify that transport used.
* TL_LISTENER, TL_ACCEPTOR, TL_ACCEPTED and TL_EAGER are for debugging only,
* they allow to identify the endpoint more easily.
*/
#define TL_LISTENER 0x00010 /* the listener endpoint */
#define TL_ACCEPTOR 0x00020 /* the accepting endpoint */
#define TL_EAGER 0x00040 /* connecting endpoint */
#define TL_ACCEPTED 0x00080 /* accepted connection */
#define TL_SETCRED 0x00100 /* flag to indicate sending of credentials */
#define TL_SETUCRED 0x00200 /* flag to indicate sending of ucred */
#define TL_SOCKUCRED 0x00400 /* flag to indicate sending of SCM_UCRED */
#define TL_ADDRHASHED 0x01000 /* Endpoint address is stored in te_addrhash */
#define TL_CLOSE_SER 0x10000 /* Endpoint close has entered the serializer */
/*
* Boolean checks for the endpoint type.
*/
#define IS_CLTS(x) (((x)->te_flag & TL_TICLTS) != 0)
#define IS_COTS(x) (((x)->te_flag & TL_TICLTS) == 0)
#define IS_COTSORD(x) (((x)->te_flag & TL_TICOTSORD) != 0)
#define IS_SOCKET(x) (((x)->te_flag & TL_SOCKET) != 0)
/*
* Certain operations are always used together. These macros reduce the chance
* of missing a part of a combination.
*/
#define TL_UNCONNECT(x) { tl_refrele(x); x = NULL; }
#define TL_REMOVE_PEER(x) { if ((x) != NULL) TL_UNCONNECT(x) }
#define TL_PUTBQ(x, mp) { \
ASSERT(!((x)->te_flag & TL_CLOSE_SER)); \
(x)->te_nowsrv = B_TRUE; \
(void) putbq((x)->te_wq, mp); \
}
#define TL_QENABLE(x) { (x)->te_nowsrv = B_FALSE; qenable((x)->te_wq); }
#define TL_PUTQ(x, mp) { (x)->te_nowsrv = B_FALSE; (void)putq((x)->te_wq, mp); }
/*
* STREAMS driver glue data structures.
*/
static struct module_info tl_minfo = {
TL_ID, /* mi_idnum */
TL_NAME, /* mi_idname */
TL_MINPSZ, /* mi_minpsz */
TL_MAXPSZ, /* mi_maxpsz */
TL_HIWAT, /* mi_hiwat */
TL_LOWAT /* mi_lowat */
};
static struct qinit tl_rinit = {
NULL, /* qi_putp */
(int (*)())tl_rsrv, /* qi_srvp */
tl_open, /* qi_qopen */
tl_close, /* qi_qclose */
NULL, /* qi_qadmin */
&tl_minfo, /* qi_minfo */
NULL /* qi_mstat */
};
static struct qinit tl_winit = {
(int (*)())tl_wput, /* qi_putp */
(int (*)())tl_wsrv, /* qi_srvp */
NULL, /* qi_qopen */
NULL, /* qi_qclose */
NULL, /* qi_qadmin */
&tl_minfo, /* qi_minfo */
NULL /* qi_mstat */
};
static struct streamtab tlinfo = {
&tl_rinit, /* st_rdinit */
&tl_winit, /* st_wrinit */
NULL, /* st_muxrinit */
NULL /* st_muxwrinit */
};
DDI_DEFINE_STREAM_OPS(tl_devops, nulldev, nulldev, tl_attach, tl_detach,
nulldev, tl_info, D_MP, &tlinfo, ddi_quiesce_not_supported);
static struct modldrv modldrv = {
&mod_driverops, /* Type of module -- pseudo driver here */
"TPI Local Transport (tl)",
&tl_devops, /* driver ops */
};
/*
* Module linkage information for the kernel.
*/
static struct modlinkage modlinkage = {
MODREV_1,
&modldrv,
NULL
};
/*
* Templates for response to info request
* Check sanity of unlimited connect data etc.
*/
#define TL_CLTS_PROVIDER_FLAG (XPG4_1|SENDZERO)
#define TL_COTS_PROVIDER_FLAG (XPG4_1|SENDZERO)
static struct T_info_ack tl_cots_info_ack =
{
T_INFO_ACK, /* PRIM_type -always T_INFO_ACK */
T_INFINITE, /* TSDU size */
T_INFINITE, /* ETSDU size */
T_INFINITE, /* CDATA_size */
T_INFINITE, /* DDATA_size */
T_INFINITE, /* ADDR_size */
T_INFINITE, /* OPT_size */
0, /* TIDU_size - fill at run time */
T_COTS, /* SERV_type */
-1, /* CURRENT_state */
TL_COTS_PROVIDER_FLAG /* PROVIDER_flag */
};
static struct T_info_ack tl_clts_info_ack =
{
T_INFO_ACK, /* PRIM_type - always T_INFO_ACK */
0, /* TSDU_size - fill at run time */
-2, /* ETSDU_size -2 => not supported */
-2, /* CDATA_size -2 => not supported */
-2, /* DDATA_size -2 => not supported */
-1, /* ADDR_size -1 => unlimited */
-1, /* OPT_size */
0, /* TIDU_size - fill at run time */
T_CLTS, /* SERV_type */
-1, /* CURRENT_state */
TL_CLTS_PROVIDER_FLAG /* PROVIDER_flag */
};
/*
* private copy of devinfo pointer used in tl_info
*/
static dev_info_t *tl_dip;
/*
* Endpoints cache.
*/
static kmem_cache_t *tl_cache;
/*
* Minor number space.
*/
static id_space_t *tl_minors;
/*
* Default Data Unit size.
*/
static t_scalar_t tl_tidusz;
/*
* Size of hash tables.
*/
static size_t tl_hash_size = TL_HASH_SIZE;
/*
* Debug and test variable ONLY. Turn off T_CONN_IND queueing
* for sockets.
*/
static int tl_disable_early_connect = 0;
static int tl_client_closing_when_accepting;
static int tl_serializer_noswitch;
/*
* LOCAL FUNCTION PROTOTYPES
* -------------------------
*/
static boolean_t tl_eqaddr(tl_addr_t *, tl_addr_t *);
static void tl_do_proto(mblk_t *, tl_endpt_t *);
static void tl_do_ioctl(mblk_t *, tl_endpt_t *);
static void tl_do_ioctl_ser(mblk_t *, tl_endpt_t *);
static void tl_error_ack(queue_t *, mblk_t *, t_scalar_t, t_scalar_t,
t_scalar_t);
static void tl_bind(mblk_t *, tl_endpt_t *);
static void tl_bind_ser(mblk_t *, tl_endpt_t *);
static void tl_ok_ack(queue_t *, mblk_t *mp, t_scalar_t);
static void tl_unbind(mblk_t *, tl_endpt_t *);
static void tl_optmgmt(queue_t *, mblk_t *);
static void tl_conn_req(queue_t *, mblk_t *);
static void tl_conn_req_ser(mblk_t *, tl_endpt_t *);
static void tl_conn_res(mblk_t *, tl_endpt_t *);
static void tl_discon_req(mblk_t *, tl_endpt_t *);
static void tl_capability_req(mblk_t *, tl_endpt_t *);
static void tl_info_req_ser(mblk_t *, tl_endpt_t *);
static void tl_info_req(mblk_t *, tl_endpt_t *);
static void tl_addr_req(mblk_t *, tl_endpt_t *);
static void tl_connected_cots_addr_req(mblk_t *, tl_endpt_t *);
static void tl_data(mblk_t *, tl_endpt_t *);
static void tl_exdata(mblk_t *, tl_endpt_t *);
static void tl_ordrel(mblk_t *, tl_endpt_t *);
static void tl_unitdata(mblk_t *, tl_endpt_t *);
static void tl_unitdata_ser(mblk_t *, tl_endpt_t *);
static void tl_uderr(queue_t *, mblk_t *, t_scalar_t);
static tl_endpt_t *tl_find_peer(tl_endpt_t *, tl_addr_t *);
static tl_endpt_t *tl_sock_find_peer(tl_endpt_t *, struct so_ux_addr *);
static boolean_t tl_get_any_addr(tl_endpt_t *, tl_addr_t *);
static void tl_cl_backenable(tl_endpt_t *);
static void tl_co_unconnect(tl_endpt_t *);
static mblk_t *tl_resizemp(mblk_t *, ssize_t);
static void tl_discon_ind(tl_endpt_t *, uint32_t);
static mblk_t *tl_discon_ind_alloc(uint32_t, t_scalar_t);
static mblk_t *tl_ordrel_ind_alloc(void);
static tl_icon_t *tl_icon_find(tl_endpt_t *, t_scalar_t);
static void tl_icon_queuemsg(tl_endpt_t *, t_scalar_t, mblk_t *);
static boolean_t tl_icon_hasprim(tl_endpt_t *, t_scalar_t, t_scalar_t);
static void tl_icon_sendmsgs(tl_endpt_t *, mblk_t **);
static void tl_icon_freemsgs(mblk_t **);
static void tl_merror(queue_t *, mblk_t *, int);
static void tl_fill_option(uchar_t *, cred_t *, pid_t, int, cred_t *);
static int tl_default_opt(queue_t *, int, int, uchar_t *);
static int tl_get_opt(queue_t *, int, int, uchar_t *);
static int tl_set_opt(queue_t *, uint_t, int, int, uint_t, uchar_t *, uint_t *,
uchar_t *, void *, cred_t *);
static void tl_memrecover(queue_t *, mblk_t *, size_t);
static void tl_freetip(tl_endpt_t *, tl_icon_t *);
static void tl_free(tl_endpt_t *);
static int tl_constructor(void *, void *, int);
static void tl_destructor(void *, void *);
static void tl_find_callback(mod_hash_key_t, mod_hash_val_t);
static tl_serializer_t *tl_serializer_alloc(int);
static void tl_serializer_refhold(tl_serializer_t *);
static void tl_serializer_refrele(tl_serializer_t *);
static void tl_serializer_enter(tl_endpt_t *, tlproc_t, mblk_t *);
static void tl_serializer_exit(tl_endpt_t *);
static boolean_t tl_noclose(tl_endpt_t *);
static void tl_closeok(tl_endpt_t *);
static void tl_refhold(tl_endpt_t *);
static void tl_refrele(tl_endpt_t *);
static int tl_hash_cmp_addr(mod_hash_key_t, mod_hash_key_t);
static uint_t tl_hash_by_addr(void *, mod_hash_key_t);
static void tl_close_ser(mblk_t *, tl_endpt_t *);
static void tl_close_finish_ser(mblk_t *, tl_endpt_t *);
static void tl_wput_data_ser(mblk_t *, tl_endpt_t *);
static void tl_proto_ser(mblk_t *, tl_endpt_t *);
static void tl_putq_ser(mblk_t *, tl_endpt_t *);
static void tl_wput_common_ser(mblk_t *, tl_endpt_t *);
static void tl_wput_ser(mblk_t *, tl_endpt_t *);
static void tl_wsrv_ser(mblk_t *, tl_endpt_t *);
static void tl_rsrv_ser(mblk_t *, tl_endpt_t *);
static void tl_addr_unbind(tl_endpt_t *);
/*
* Intialize option database object for TL
*/
optdb_obj_t tl_opt_obj = {
tl_default_opt, /* TL default value function pointer */
tl_get_opt, /* TL get function pointer */
tl_set_opt, /* TL set function pointer */
TL_OPT_ARR_CNT, /* TL option database count of entries */
tl_opt_arr, /* TL option database */
TL_VALID_LEVELS_CNT, /* TL valid level count of entries */
tl_valid_levels_arr /* TL valid level array */
};
/*
* Logical operations.
*
* IMPLY(X, Y) means that X implies Y i.e. when X is true, Y
* should also be true.
*
* EQUIV(X, Y) is logical equivalence. Both X and Y should be true or false at
* the same time.
*/
#define IMPLY(X, Y) (!(X) || (Y))
#define EQUIV(X, Y) (IMPLY(X, Y) && IMPLY(Y, X))
/*
* LOCAL FUNCTIONS AND DRIVER ENTRY POINTS
* ---------------------------------------
*/
/*
* Loadable module routines
*/
int
_init(void)
{
return (mod_install(&modlinkage));
}
int
_fini(void)
{
return (mod_remove(&modlinkage));
}
int
_info(struct modinfo *modinfop)
{
return (mod_info(&modlinkage, modinfop));
}
/*
* Driver Entry Points and Other routines
*/
static int
tl_attach(dev_info_t *devi, ddi_attach_cmd_t cmd)
{
int i;
char name[32];
/*
* Resume from a checkpoint state.
*/
if (cmd == DDI_RESUME)
return (DDI_SUCCESS);
if (cmd != DDI_ATTACH)
return (DDI_FAILURE);
/*
* Deduce TIDU size to use. Note: "strmsgsz" being 0 has semantics that
* streams message sizes can be unlimited. We use a defined constant
* instead.
*/
tl_tidusz = strmsgsz != 0 ? (t_scalar_t)strmsgsz : TL_TIDUSZ;
/*
* Create subdevices for each transport.
*/
for (i = 0; i < TL_UNUSED; i++) {
if (ddi_create_minor_node(devi,
tl_transports[i].tr_name,
S_IFCHR, tl_transports[i].tr_minor,
DDI_PSEUDO, NULL) == DDI_FAILURE) {
ddi_remove_minor_node(devi, NULL);
return (DDI_FAILURE);
}
}
tl_cache = kmem_cache_create("tl_cache", sizeof (tl_endpt_t),
0, tl_constructor, tl_destructor, NULL, NULL, NULL, 0);
if (tl_cache == NULL) {
ddi_remove_minor_node(devi, NULL);
return (DDI_FAILURE);
}
tl_minors = id_space_create("tl_minor_space",
TL_MINOR_START, MAXMIN32 - TL_MINOR_START + 1);
/*
* Create ID space for minor numbers
*/
for (i = 0; i < TL_MAXTRANSPORT; i++) {
tl_transport_state_t *t = &tl_transports[i];
if (i == TL_UNUSED)
continue;
/* Socket COTSORD shares namespace with COTS */
if (i == TL_SOCK_COTSORD) {
t->tr_ai_hash =
tl_transports[TL_SOCK_COTS].tr_ai_hash;
ASSERT(t->tr_ai_hash != NULL);
t->tr_addr_hash =
tl_transports[TL_SOCK_COTS].tr_addr_hash;
ASSERT(t->tr_addr_hash != NULL);
continue;
}
/*
* Create hash tables.
*/
(void) snprintf(name, sizeof (name), "%s_ai_hash",
t->tr_name);
#ifdef _ILP32
if (i & TL_SOCKET)
t->tr_ai_hash =
mod_hash_create_idhash(name, tl_hash_size - 1,
mod_hash_null_valdtor);
else
t->tr_ai_hash =
mod_hash_create_ptrhash(name, tl_hash_size,
mod_hash_null_valdtor, sizeof (queue_t));
#else
t->tr_ai_hash =
mod_hash_create_idhash(name, tl_hash_size - 1,
mod_hash_null_valdtor);
#endif /* _ILP32 */
if (i & TL_SOCKET) {
(void) snprintf(name, sizeof (name), "%s_sockaddr_hash",
t->tr_name);
t->tr_addr_hash = mod_hash_create_ptrhash(name,
tl_hash_size, mod_hash_null_valdtor,
sizeof (uintptr_t));
} else {
(void) snprintf(name, sizeof (name), "%s_addr_hash",
t->tr_name);
t->tr_addr_hash = mod_hash_create_extended(name,
tl_hash_size, mod_hash_null_keydtor,
mod_hash_null_valdtor,
tl_hash_by_addr, NULL, tl_hash_cmp_addr, KM_SLEEP);
}
/* Create serializer for connectionless transports. */
if (i & TL_TICLTS)
t->tr_serializer = tl_serializer_alloc(KM_SLEEP);
}
tl_dip = devi;
return (DDI_SUCCESS);
}
static int
tl_detach(dev_info_t *devi, ddi_detach_cmd_t cmd)
{
int i;
if (cmd == DDI_SUSPEND)
return (DDI_SUCCESS);
if (cmd != DDI_DETACH)
return (DDI_FAILURE);
/*
* Destroy arenas and hash tables.
*/
for (i = 0; i < TL_MAXTRANSPORT; i++) {
tl_transport_state_t *t = &tl_transports[i];
if ((i == TL_UNUSED) || (i == TL_SOCK_COTSORD))
continue;
ASSERT(EQUIV(i & TL_TICLTS, t->tr_serializer != NULL));
if (t->tr_serializer != NULL) {
tl_serializer_refrele(t->tr_serializer);
t->tr_serializer = NULL;
}
#ifdef _ILP32
if (i & TL_SOCKET)
mod_hash_destroy_idhash(t->tr_ai_hash);
else
mod_hash_destroy_ptrhash(t->tr_ai_hash);
#else
mod_hash_destroy_idhash(t->tr_ai_hash);
#endif /* _ILP32 */
t->tr_ai_hash = NULL;
if (i & TL_SOCKET)
mod_hash_destroy_ptrhash(t->tr_addr_hash);
else
mod_hash_destroy_hash(t->tr_addr_hash);
t->tr_addr_hash = NULL;
}
kmem_cache_destroy(tl_cache);
tl_cache = NULL;
id_space_destroy(tl_minors);
tl_minors = NULL;
ddi_remove_minor_node(devi, NULL);
return (DDI_SUCCESS);
}
/* ARGSUSED */
static int
tl_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result)
{
int retcode = DDI_FAILURE;
switch (infocmd) {
case DDI_INFO_DEVT2DEVINFO:
if (tl_dip != NULL) {
*result = (void *)tl_dip;
retcode = DDI_SUCCESS;
}
break;
case DDI_INFO_DEVT2INSTANCE:
*result = (void *)0;
retcode = DDI_SUCCESS;
break;
default:
break;
}
return (retcode);
}
/*
* Endpoint reference management.
*/
static void
tl_refhold(tl_endpt_t *tep)
{
atomic_add_32(&tep->te_refcnt, 1);
}
static void
tl_refrele(tl_endpt_t *tep)
{
ASSERT(tep->te_refcnt != 0);
if (atomic_add_32_nv(&tep->te_refcnt, -1) == 0)
tl_free(tep);
}
/*ARGSUSED*/
static int
tl_constructor(void *buf, void *cdrarg, int kmflags)
{
tl_endpt_t *tep = buf;
bzero(tep, sizeof (tl_endpt_t));
mutex_init(&tep->te_closelock, NULL, MUTEX_DEFAULT, NULL);
cv_init(&tep->te_closecv, NULL, CV_DEFAULT, NULL);
mutex_init(&tep->te_srv_lock, NULL, MUTEX_DEFAULT, NULL);
cv_init(&tep->te_srv_cv, NULL, CV_DEFAULT, NULL);
mutex_init(&tep->te_ser_lock, NULL, MUTEX_DEFAULT, NULL);
return (0);
}
/*ARGSUSED*/
static void
tl_destructor(void *buf, void *cdrarg)
{
tl_endpt_t *tep = buf;
mutex_destroy(&tep->te_closelock);
cv_destroy(&tep->te_closecv);
mutex_destroy(&tep->te_srv_lock);
cv_destroy(&tep->te_srv_cv);
mutex_destroy(&tep->te_ser_lock);
}
static void
tl_free(tl_endpt_t *tep)
{
ASSERT(tep->te_refcnt == 0);
ASSERT(tep->te_transport != NULL);
ASSERT(tep->te_rq == NULL);
ASSERT(tep->te_wq == NULL);
ASSERT(tep->te_ser != NULL);
ASSERT(tep->te_ser_count == 0);
ASSERT(! (tep->te_flag & TL_ADDRHASHED));
if (IS_SOCKET(tep)) {
ASSERT(tep->te_alen == TL_SOUX_ADDRLEN);
ASSERT(tep->te_abuf == &tep->te_uxaddr);
ASSERT(tep->te_vp == (void *)(uintptr_t)tep->te_minor);
ASSERT(tep->te_magic == SOU_MAGIC_IMPLICIT);
} else if (tep->te_abuf != NULL) {
kmem_free(tep->te_abuf, tep->te_alen);
tep->te_alen = -1; /* uninitialized */
tep->te_abuf = NULL;
} else {
ASSERT(tep->te_alen == -1);
}
id_free(tl_minors, tep->te_minor);
ASSERT(tep->te_credp == NULL);
if (tep->te_hash_hndl != NULL)
mod_hash_cancel(tep->te_addrhash, &tep->te_hash_hndl);
if (IS_COTS(tep)) {
TL_REMOVE_PEER(tep->te_conp);
TL_REMOVE_PEER(tep->te_oconp);
tl_serializer_refrele(tep->te_ser);
tep->te_ser = NULL;
ASSERT(tep->te_nicon == 0);
ASSERT(list_head(&tep->te_iconp) == NULL);
} else {
ASSERT(tep->te_lastep == NULL);
ASSERT(list_head(&tep->te_flowlist) == NULL);
ASSERT(tep->te_flowq == NULL);
}
ASSERT(tep->te_bufcid == 0);
ASSERT(tep->te_timoutid == 0);
bzero(&tep->te_ap, sizeof (tep->te_ap));
tep->te_acceptor_id = 0;
ASSERT(tep->te_closewait == 0);
ASSERT(!tep->te_rsrv_active);
ASSERT(!tep->te_wsrv_active);
tep->te_closing = 0;
tep->te_nowsrv = B_FALSE;
tep->te_flag = 0;
kmem_cache_free(tl_cache, tep);
}
/*
* Allocate/free reference-counted wrappers for serializers.
*/
static tl_serializer_t *
tl_serializer_alloc(int flags)
{
tl_serializer_t *s = kmem_alloc(sizeof (tl_serializer_t), flags);
serializer_t *ser;
if (s == NULL)
return (NULL);
ser = serializer_create(flags);
if (ser == NULL) {
kmem_free(s, sizeof (tl_serializer_t));
return (NULL);
}
s->ts_refcnt = 1;
s->ts_serializer = ser;
return (s);
}
static void
tl_serializer_refhold(tl_serializer_t *s)
{
atomic_add_32(&s->ts_refcnt, 1);
}
static void
tl_serializer_refrele(tl_serializer_t *s)
{
if (atomic_add_32_nv(&s->ts_refcnt, -1) == 0) {
serializer_destroy(s->ts_serializer);
kmem_free(s, sizeof (tl_serializer_t));
}
}
/*
* Post a request on the endpoint serializer. For COTS transports keep track of
* the number of pending requests.
*/
static void
tl_serializer_enter(tl_endpt_t *tep, tlproc_t tlproc, mblk_t *mp)
{
if (IS_COTS(tep)) {
mutex_enter(&tep->te_ser_lock);
tep->te_ser_count++;
mutex_exit(&tep->te_ser_lock);
}
serializer_enter(tep->te_serializer, (srproc_t *)tlproc, mp, tep);
}
/*
* Complete processing the request on the serializer. Decrement the counter for
* pending requests for COTS transports.
*/
static void
tl_serializer_exit(tl_endpt_t *tep)
{
if (IS_COTS(tep)) {
mutex_enter(&tep->te_ser_lock);
ASSERT(tep->te_ser_count != 0);
tep->te_ser_count--;
mutex_exit(&tep->te_ser_lock);
}
}
/*
* Hash management functions.
*/
/*
* Return TRUE if two addresses are equal, false otherwise.
*/
static boolean_t
tl_eqaddr(tl_addr_t *ap1, tl_addr_t *ap2)
{
return ((ap1->ta_alen > 0) &&
(ap1->ta_alen == ap2->ta_alen) &&
(ap1->ta_zoneid == ap2->ta_zoneid) &&
(bcmp(ap1->ta_abuf, ap2->ta_abuf, ap1->ta_alen) == 0));
}
/*
* This function is called whenever an endpoint is found in the hash table.
*/
/* ARGSUSED0 */
static void
tl_find_callback(mod_hash_key_t key, mod_hash_val_t val)
{
tl_refhold((tl_endpt_t *)val);
}
/*
* Address hash function.
*/
/* ARGSUSED */
static uint_t
tl_hash_by_addr(void *hash_data, mod_hash_key_t key)
{
tl_addr_t *ap = (tl_addr_t *)key;
size_t len = ap->ta_alen;
uchar_t *p = ap->ta_abuf;
uint_t i, g;
ASSERT((len > 0) && (p != NULL));
for (i = ap->ta_zoneid; len -- != 0; p++) {
i = (i << 4) + (*p);
if ((g = (i & 0xf0000000U)) != 0) {
i ^= (g >> 24);
i ^= g;
}
}
return (i);
}
/*
* This function is used by hash lookups. It compares two generic addresses.
*/
static int
tl_hash_cmp_addr(mod_hash_key_t key1, mod_hash_key_t key2)
{
#ifdef DEBUG
tl_addr_t *ap1 = (tl_addr_t *)key1;
tl_addr_t *ap2 = (tl_addr_t *)key2;
ASSERT(key1 != NULL);
ASSERT(key2 != NULL);
ASSERT(ap1->ta_abuf != NULL);
ASSERT(ap2->ta_abuf != NULL);
ASSERT(ap1->ta_alen > 0);
ASSERT(ap2->ta_alen > 0);
#endif
return (! tl_eqaddr((tl_addr_t *)key1, (tl_addr_t *)key2));
}
/*
* Prevent endpoint from closing if possible.
* Return B_TRUE on success, B_FALSE on failure.
*/
static boolean_t
tl_noclose(tl_endpt_t *tep)
{
boolean_t rc = B_FALSE;
mutex_enter(&tep->te_closelock);
if (! tep->te_closing) {
ASSERT(tep->te_closewait == 0);
tep->te_closewait++;
rc = B_TRUE;
}
mutex_exit(&tep->te_closelock);
return (rc);
}
/*
* Allow endpoint to close if needed.
*/
static void
tl_closeok(tl_endpt_t *tep)
{
ASSERT(tep->te_closewait > 0);
mutex_enter(&tep->te_closelock);
ASSERT(tep->te_closewait == 1);
tep->te_closewait--;
cv_signal(&tep->te_closecv);
mutex_exit(&tep->te_closelock);
}
/*
* STREAMS open entry point.
*/
/* ARGSUSED */
static int
tl_open(queue_t *rq, dev_t *devp, int oflag, int sflag, cred_t *credp)
{
tl_endpt_t *tep;
minor_t minor = getminor(*devp);
/*
* Driver is called directly. Both CLONEOPEN and MODOPEN
* are illegal
*/
if ((sflag == CLONEOPEN) || (sflag == MODOPEN))
return (ENXIO);
if (rq->q_ptr != NULL)
return (0);
/* Minor number should specify the mode used for the driver. */
if ((minor >= TL_UNUSED))
return (ENXIO);
if (oflag & SO_SOCKSTR) {
minor |= TL_SOCKET;
}
tep = kmem_cache_alloc(tl_cache, KM_SLEEP);
tep->te_refcnt = 1;
tep->te_cpid = curproc->p_pid;
rq->q_ptr = WR(rq)->q_ptr = tep;
tep->te_state = TS_UNBND;
tep->te_credp = credp;
crhold(credp);
tep->te_zoneid = getzoneid();
tep->te_flag = minor & TL_MINOR_MASK;
tep->te_transport = &tl_transports[minor];
/* Allocate a unique minor number for this instance. */
tep->te_minor = (minor_t)id_alloc(tl_minors);
/* Reserve hash handle for bind(). */
(void) mod_hash_reserve(tep->te_addrhash, &tep->te_hash_hndl);
/* Transport-specific initialization */
if (IS_COTS(tep)) {
/* Use private serializer */
tep->te_ser = tl_serializer_alloc(KM_SLEEP);
/* Create list for pending connections */
list_create(&tep->te_iconp, sizeof (tl_icon_t),
offsetof(tl_icon_t, ti_node));
tep->te_qlen = 0;
tep->te_nicon = 0;
tep->te_oconp = NULL;
tep->te_conp = NULL;
} else {
/* Use shared serializer */
tep->te_ser = tep->te_transport->tr_serializer;
bzero(&tep->te_flows, sizeof (list_node_t));
/* Create list for flow control */
list_create(&tep->te_flowlist, sizeof (tl_endpt_t),
offsetof(tl_endpt_t, te_flows));
tep->te_flowq = NULL;
tep->te_lastep = NULL;
}
/* Initialize endpoint address */
if (IS_SOCKET(tep)) {
/* Socket-specific address handling. */
tep->te_alen = TL_SOUX_ADDRLEN;
tep->te_abuf = &tep->te_uxaddr;
tep->te_vp = (void *)(uintptr_t)tep->te_minor;
tep->te_magic = SOU_MAGIC_IMPLICIT;
} else {
tep->te_alen = -1;
tep->te_abuf = NULL;
}
/* clone the driver */
*devp = makedevice(getmajor(*devp), tep->te_minor);
tep->te_rq = rq;
tep->te_wq = WR(rq);
#ifdef _ILP32
if (IS_SOCKET(tep))
tep->te_acceptor_id = tep->te_minor;
else
tep->te_acceptor_id = (t_uscalar_t)rq;
#else
tep->te_acceptor_id = tep->te_minor;
#endif /* _ILP32 */
qprocson(rq);
/*
* Insert acceptor ID in the hash. The AI hash always sleeps on
* insertion so insertion can't fail.
*/
(void) mod_hash_insert(tep->te_transport->tr_ai_hash,
(mod_hash_key_t)(uintptr_t)tep->te_acceptor_id,
(mod_hash_val_t)tep);
return (0);
}
/* ARGSUSED1 */
static int
tl_close(queue_t *rq, int flag, cred_t *credp)
{
tl_endpt_t *tep = (tl_endpt_t *)rq->q_ptr;
tl_endpt_t *elp = NULL;
queue_t *wq = tep->te_wq;
int rc;
ASSERT(wq == WR(rq));
/*
* Remove the endpoint from acceptor hash.
*/
rc = mod_hash_remove(tep->te_transport->tr_ai_hash,
(mod_hash_key_t)(uintptr_t)tep->te_acceptor_id,
(mod_hash_val_t *)&elp);
ASSERT(rc == 0 && tep == elp);
if ((rc != 0) || (tep != elp)) {
(void) (STRLOG(TL_ID, tep->te_minor, 1,
SL_TRACE|SL_ERROR,
"tl_close:inconsistency in AI hash"));
}
/*
* Wait till close is safe, then mark endpoint as closing.
*/
mutex_enter(&tep->te_closelock);
while (tep->te_closewait)
cv_wait(&tep->te_closecv, &tep->te_closelock);
tep->te_closing = B_TRUE;
/*
* Will wait for the serializer part of the close to finish, so set
* te_closewait now.
*/
tep->te_closewait = 1;
tep->te_nowsrv = B_FALSE;
mutex_exit(&tep->te_closelock);
/*
* tl_close_ser doesn't drop reference, so no need to tl_refhold.
* It is safe because close will wait for tl_close_ser to finish.
*/
tl_serializer_enter(tep, tl_close_ser, &tep->te_closemp);
/*
* Wait for the first phase of close to complete before qprocsoff().
*/
mutex_enter(&tep->te_closelock);
while (tep->te_closewait)
cv_wait(&tep->te_closecv, &tep->te_closelock);
mutex_exit(&tep->te_closelock);
qprocsoff(rq);
if (tep->te_bufcid) {
qunbufcall(rq, tep->te_bufcid);
tep->te_bufcid = 0;
}
if (tep->te_timoutid) {
(void) quntimeout(rq, tep->te_timoutid);
tep->te_timoutid = 0;
}
/*
* Finish close behind serializer.
*
* For a CLTS endpoint increase a refcount and continue close processing
* with serializer protection. This processing may happen asynchronously
* with the completion of tl_close().
*
* Fot a COTS endpoint wait before destroying tep since the serializer
* may go away together with tep and we need to destroy serializer
* outside of serializer context.
*/
ASSERT(tep->te_closewait == 0);
if (IS_COTS(tep))
tep->te_closewait = 1;
else
tl_refhold(tep);
tl_serializer_enter(tep, tl_close_finish_ser, &tep->te_closemp);
/*
* For connection-oriented transports wait for all serializer activity
* to settle down.
*/
if (IS_COTS(tep)) {
mutex_enter(&tep->te_closelock);
while (tep->te_closewait)
cv_wait(&tep->te_closecv, &tep->te_closelock);
mutex_exit(&tep->te_closelock);
}
crfree(tep->te_credp);
tep->te_credp = NULL;
tep->te_wq = NULL;
tl_refrele(tep);
/*
* tep is likely to be destroyed now, so can't reference it any more.
*/
rq->q_ptr = wq->q_ptr = NULL;
return (0);
}
/*
* First phase of close processing done behind the serializer.
*
* Do not drop the reference in the end - tl_close() wants this reference to
* stay.
*/
/* ARGSUSED0 */
static void
tl_close_ser(mblk_t *mp, tl_endpt_t *tep)
{
ASSERT(tep->te_closing);
ASSERT(tep->te_closewait == 1);
ASSERT(!(tep->te_flag & TL_CLOSE_SER));
tep->te_flag |= TL_CLOSE_SER;
/*
* Drain out all messages on queue except for TL_TICOTS where the
* abortive release semantics permit discarding of data on close
*/
if (tep->te_wq->q_first && (IS_CLTS(tep) || IS_COTSORD(tep))) {
tl_wsrv_ser(NULL, tep);
}
/* Remove address from hash table. */
tl_addr_unbind(tep);
/*
* qprocsoff() gets confused when q->q_next is not NULL on the write
* queue of the driver, so clear these before qprocsoff() is called.
* Also clear q_next for the peer since this queue is going away.
*/
if (IS_COTS(tep) && !IS_SOCKET(tep)) {
tl_endpt_t *peer_tep = tep->te_conp;
tep->te_wq->q_next = NULL;
if ((peer_tep != NULL) && !peer_tep->te_closing)
peer_tep->te_wq->q_next = NULL;
}
tep->te_rq = NULL;
/* wake up tl_close() */
tl_closeok(tep);
tl_serializer_exit(tep);
}
/*
* Second phase of tl_close(). Should wakeup tl_close() for COTS mode and drop
* the reference for CLTS.
*
* Called from serializer. Should drop reference count for CLTS only.
*/
/* ARGSUSED0 */
static void
tl_close_finish_ser(mblk_t *mp, tl_endpt_t *tep)
{
ASSERT(tep->te_closing);
ASSERT(IMPLY(IS_CLTS(tep), tep->te_closewait == 0));
ASSERT(IMPLY(IS_COTS(tep), tep->te_closewait == 1));
tep->te_state = -1; /* Uninitialized */
if (IS_COTS(tep)) {
tl_co_unconnect(tep);
} else {
/* Connectionless specific cleanup */
TL_REMOVE_PEER(tep->te_lastep);
/*
* Backenable anybody that is flow controlled waiting for
* this endpoint.
*/
tl_cl_backenable(tep);
if (tep->te_flowq != NULL) {
list_remove(&(tep->te_flowq->te_flowlist), tep);
tep->te_flowq = NULL;
}
}
tl_serializer_exit(tep);
if (IS_COTS(tep))
tl_closeok(tep);
else
tl_refrele(tep);
}
/*
* STREAMS write-side put procedure.
* Enter serializer for most of the processing.
*
* The T_CONN_REQ is processed outside of serializer.
*/
static void
tl_wput(queue_t *wq, mblk_t *mp)
{
tl_endpt_t *tep = (tl_endpt_t *)wq->q_ptr;
ssize_t msz = MBLKL(mp);
union T_primitives *prim = (union T_primitives *)mp->b_rptr;
tlproc_t *tl_proc = NULL;
switch (DB_TYPE(mp)) {
case M_DATA:
/* Only valid for connection-oriented transports */
if (IS_CLTS(tep)) {
(void) (STRLOG(TL_ID, tep->te_minor, 1,
SL_TRACE|SL_ERROR,
"tl_wput:M_DATA invalid for ticlts driver"));
tl_merror(wq, mp, EPROTO);
return;
}
tl_proc = tl_wput_data_ser;
break;
case M_IOCTL:
switch (((struct iocblk *)mp->b_rptr)->ioc_cmd) {
case TL_IOC_CREDOPT:
/* FALLTHROUGH */
case TL_IOC_UCREDOPT:
/*
* Serialize endpoint state change.
*/
tl_proc = tl_do_ioctl_ser;
break;
default:
miocnak(wq, mp, 0, EINVAL);
return;
}
break;
case M_FLUSH:
/*
* do canonical M_FLUSH processing
*/
if (*mp->b_rptr & FLUSHW) {
flushq(wq, FLUSHALL);
*mp->b_rptr &= ~FLUSHW;
}
if (*mp->b_rptr & FLUSHR) {
flushq(RD(wq), FLUSHALL);
qreply(wq, mp);
} else {
freemsg(mp);
}
return;
case M_PROTO:
if (msz < sizeof (prim->type)) {
(void) (STRLOG(TL_ID, tep->te_minor, 1,
SL_TRACE|SL_ERROR,
"tl_wput:M_PROTO data too short"));
tl_merror(wq, mp, EPROTO);
return;
}
switch (prim->type) {
case T_OPTMGMT_REQ:
case T_SVR4_OPTMGMT_REQ:
/*
* Process TPI option management requests immediately
* in put procedure regardless of in-order processing
* of already queued messages.
* (Note: This driver supports AF_UNIX socket
* implementation. Unless we implement this processing,
* setsockopt() on socket endpoint will block on flow
* controlled endpoints which it should not. That is
* required for successful execution of VSU socket tests
* and is consistent with BSD socket behavior).
*/
tl_optmgmt(wq, mp);
return;
case O_T_BIND_REQ:
case T_BIND_REQ:
tl_proc = tl_bind_ser;
break;
case T_CONN_REQ:
if (IS_CLTS(tep)) {
tl_merror(wq, mp, EPROTO);
return;
}
tl_conn_req(wq, mp);
return;
case T_DATA_REQ:
case T_OPTDATA_REQ:
case T_EXDATA_REQ:
case T_ORDREL_REQ:
tl_proc = tl_putq_ser;
break;
case T_UNITDATA_REQ:
if (IS_COTS(tep) ||
(msz < sizeof (struct T_unitdata_req))) {
tl_merror(wq, mp, EPROTO);
return;
}
if ((tep->te_state == TS_IDLE) && !wq->q_first) {
tl_proc = tl_unitdata_ser;
} else {
tl_proc = tl_putq_ser;
}
break;
default:
/*
* process in service procedure if message already
* queued (maintain in-order processing)
*/
if (wq->q_first != NULL) {
tl_proc = tl_putq_ser;
} else {
tl_proc = tl_wput_ser;
}
break;
}
break;
case M_PCPROTO:
/*
* Check that the message has enough data to figure out TPI
* primitive.
*/
if (msz < sizeof (prim->type)) {
(void) (STRLOG(TL_ID, tep->te_minor, 1,
SL_TRACE|SL_ERROR,
"tl_wput:M_PCROTO data too short"));
tl_merror(wq, mp, EPROTO);
return;
}
switch (prim->type) {
case T_CAPABILITY_REQ:
tl_capability_req(mp, tep);
return;
case T_INFO_REQ:
tl_proc = tl_info_req_ser;
break;
default:
(void) (STRLOG(TL_ID, tep->te_minor, 1,
SL_TRACE|SL_ERROR,
"tl_wput:unknown TPI msg primitive"));
tl_merror(wq, mp, EPROTO);
return;
}
break;
default:
(void) (STRLOG(TL_ID, tep->te_minor, 1, SL_TRACE|SL_ERROR,
"tl_wput:default:unexpected Streams message"));
freemsg(mp);
return;
}
/*
* Continue processing via serializer.
*/
ASSERT(tl_proc != NULL);
tl_refhold(tep);
tl_serializer_enter(tep, tl_proc, mp);
}
/*
* Place message on the queue while preserving order.
*/
static void
tl_putq_ser(mblk_t *mp, tl_endpt_t *tep)
{
if (tep->te_closing) {
tl_wput_ser(mp, tep);
} else {
TL_PUTQ(tep, mp);
tl_serializer_exit(tep);
tl_refrele(tep);
}
}
static void
tl_wput_common_ser(mblk_t *mp, tl_endpt_t *tep)
{
ASSERT((DB_TYPE(mp) == M_DATA) || (DB_TYPE(mp) == M_PROTO));
switch (DB_TYPE(mp)) {
case M_DATA:
tl_data(mp, tep);
break;
case M_PROTO:
tl_do_proto(mp, tep);
break;
default:
freemsg(mp);
break;
}
}
/*
* Write side put procedure called from serializer.
*/
static void
tl_wput_ser(mblk_t *mp, tl_endpt_t *tep)
{
tl_wput_common_ser(mp, tep);
tl_serializer_exit(tep);
tl_refrele(tep);
}
/*
* M_DATA processing. Called from serializer.
*/
static void
tl_wput_data_ser(mblk_t *mp, tl_endpt_t *tep)
{
tl_endpt_t *peer_tep = tep->te_conp;
queue_t *peer_rq;
ASSERT(DB_TYPE(mp) == M_DATA);
ASSERT(IS_COTS(tep));
ASSERT(IMPLY(peer_tep, tep->te_serializer == peer_tep->te_serializer));
/*
* fastpath for data. Ignore flow control if tep is closing.
*/
if ((peer_tep != NULL) &&
!peer_tep->te_closing &&
((tep->te_state == TS_DATA_XFER) ||
(tep->te_state == TS_WREQ_ORDREL)) &&
(tep->te_wq != NULL) &&
(tep->te_wq->q_first == NULL) &&
((peer_tep->te_state == TS_DATA_XFER) ||
(peer_tep->te_state == TS_WREQ_ORDREL)) &&
((peer_rq = peer_tep->te_rq) != NULL) &&
(canputnext(peer_rq) || tep->te_closing)) {
putnext(peer_rq, mp);
} else if (tep->te_closing) {
/*
* It is possible that by the time we got here tep started to
* close. If the write queue is not empty, and the state is
* TS_DATA_XFER the data should be delivered in order, so we
* call putq() instead of freeing the data.
*/
if ((tep->te_wq != NULL) &&
((tep->te_state == TS_DATA_XFER) ||
(tep->te_state == TS_WREQ_ORDREL))) {
TL_PUTQ(tep, mp);
} else {
freemsg(mp);
}
} else {
TL_PUTQ(tep, mp);
}
tl_serializer_exit(tep);
tl_refrele(tep);
}
/*
* Write side service routine.
*
* All actual processing happens within serializer which is entered
* synchronously. It is possible that by the time tl_wsrv() wakes up, some new
* messages that need processing may have arrived, so tl_wsrv repeats until
* queue is empty or te_nowsrv is set.
*/
static void
tl_wsrv(queue_t *wq)
{
tl_endpt_t *tep = (tl_endpt_t *)wq->q_ptr;
while ((wq->q_first != NULL) && !tep->te_nowsrv) {
mutex_enter(&tep->te_srv_lock);
ASSERT(tep->te_wsrv_active == B_FALSE);
tep->te_wsrv_active = B_TRUE;
mutex_exit(&tep->te_srv_lock);
tl_serializer_enter(tep, tl_wsrv_ser, &tep->te_wsrvmp);
/*
* Wait for serializer job to complete.
*/
mutex_enter(&tep->te_srv_lock);
while (tep->te_wsrv_active) {
cv_wait(&tep->te_srv_cv, &tep->te_srv_lock);
}
cv_signal(&tep->te_srv_cv);
mutex_exit(&tep->te_srv_lock);
}
}
/*
* Serialized write side processing of the STREAMS queue.
* May be called either from tl_wsrv() or from tl_close() in which case ser_mp
* is NULL.
*/
static void
tl_wsrv_ser(mblk_t *ser_mp, tl_endpt_t *tep)
{
mblk_t *mp;
queue_t *wq = tep->te_wq;
ASSERT(wq != NULL);
while (!tep->te_nowsrv && (mp = getq(wq)) != NULL) {
tl_wput_common_ser(mp, tep);
}
/*
* Wakeup service routine unless called from close.
* If ser_mp is specified, the caller is tl_wsrv().
* Otherwise, the caller is tl_close_ser(). Since tl_close_ser() doesn't
* call tl_serializer_enter() before calling tl_wsrv_ser(), there should
* be no matching tl_serializer_exit() in this case.
* Also, there is no need to wakeup anyone since tl_close_ser() is not
* waiting on te_srv_cv.
*/
if (ser_mp != NULL) {
/*
* We are called from tl_wsrv.
*/
mutex_enter(&tep->te_srv_lock);
ASSERT(tep->te_wsrv_active);
tep->te_wsrv_active = B_FALSE;
cv_signal(&tep->te_srv_cv);
mutex_exit(&tep->te_srv_lock);
tl_serializer_exit(tep);
}
}
/*
* Called when the stream is backenabled. Enter serializer and qenable everyone
* flow controlled by tep.
*
* NOTE: The service routine should enter serializer synchronously. Otherwise it
* is possible that two instances of tl_rsrv will be running reusing the same
* rsrv mblk.
*/
static void
tl_rsrv(queue_t *rq)
{
tl_endpt_t *tep = (tl_endpt_t *)rq->q_ptr;
ASSERT(rq->q_first == NULL);
ASSERT(tep->te_rsrv_active == 0);
tep->te_rsrv_active = B_TRUE;
tl_serializer_enter(tep, tl_rsrv_ser, &tep->te_rsrvmp);
/*
* Wait for serializer job to complete.
*/
mutex_enter(&tep->te_srv_lock);
while (tep->te_rsrv_active) {
cv_wait(&tep->te_srv_cv, &tep->te_srv_lock);
}
cv_signal(&tep->te_srv_cv);
mutex_exit(&tep->te_srv_lock);
}
/* ARGSUSED */
static void
tl_rsrv_ser(mblk_t *mp, tl_endpt_t *tep)
{
tl_endpt_t *peer_tep;
if (IS_CLTS(tep) && tep->te_state == TS_IDLE) {
tl_cl_backenable(tep);
} else if (
IS_COTS(tep) &&
((peer_tep = tep->te_conp) != NULL) &&
!peer_tep->te_closing &&
((tep->te_state == TS_DATA_XFER) ||
(tep->te_state == TS_WIND_ORDREL)||
(tep->te_state == TS_WREQ_ORDREL))) {
TL_QENABLE(peer_tep);
}
/*
* Wakeup read side service routine.
*/
mutex_enter(&tep->te_srv_lock);
ASSERT(tep->te_rsrv_active);
tep->te_rsrv_active = B_FALSE;
cv_signal(&tep->te_srv_cv);
mutex_exit(&tep->te_srv_lock);
tl_serializer_exit(tep);
}
/*
* process M_PROTO messages. Always called from serializer.
*/
static void
tl_do_proto(mblk_t *mp, tl_endpt_t *tep)
{
ssize_t msz = MBLKL(mp);
union T_primitives *prim = (union T_primitives *)mp->b_rptr;
/* Message size was validated by tl_wput(). */
ASSERT(msz >= sizeof (prim->type));
switch (prim->type) {
case T_UNBIND_REQ:
tl_unbind(mp, tep);
break;
case T_ADDR_REQ:
tl_addr_req(mp, tep);
break;
case O_T_CONN_RES:
case T_CONN_RES:
if (IS_CLTS(tep)) {
tl_merror(tep->te_wq, mp, EPROTO);
break;
}
tl_conn_res(mp, tep);
break;
case T_DISCON_REQ:
if (IS_CLTS(tep)) {
tl_merror(tep->te_wq, mp, EPROTO);
break;
}
tl_discon_req(mp, tep);
break;
case T_DATA_REQ:
if (IS_CLTS(tep)) {
tl_merror(tep->te_wq, mp, EPROTO);
break;
}
tl_data(mp, tep);
break;
case T_OPTDATA_REQ:
if (IS_CLTS(tep)) {
tl_merror(tep->te_wq, mp, EPROTO);
break;
}
tl_data(mp, tep);
break;
case T_EXDATA_REQ:
if (IS_CLTS(tep)) {
tl_merror(tep->te_wq, mp, EPROTO);
break;
}
tl_exdata(mp, tep);
break;
case T_ORDREL_REQ:
if (! IS_COTSORD(tep)) {
tl_merror(tep->te_wq, mp, EPROTO);
break;
}
tl_ordrel(mp, tep);
break;
case T_UNITDATA_REQ:
if (IS_COTS(tep)) {
tl_merror(tep->te_wq, mp, EPROTO);
break;
}
tl_unitdata(mp, tep);
break;
default:
tl_merror(tep->te_wq, mp, EPROTO);
break;
}
}
/*
* Process ioctl from serializer.
* This is a wrapper around tl_do_ioctl().
*/
static void
tl_do_ioctl_ser(mblk_t *mp, tl_endpt_t *tep)
{
if (! tep->te_closing)
tl_do_ioctl(mp, tep);
else
freemsg(mp);
tl_serializer_exit(tep);
tl_refrele(tep);
}
static void
tl_do_ioctl(mblk_t *mp, tl_endpt_t *tep)
{
struct iocblk *iocbp = (struct iocblk *)mp->b_rptr;
int cmd = iocbp->ioc_cmd;
queue_t *wq = tep->te_wq;
int error;
int thisopt, otheropt;
ASSERT((cmd == TL_IOC_CREDOPT) || (cmd == TL_IOC_UCREDOPT));
switch (cmd) {
case TL_IOC_CREDOPT:
if (cmd == TL_IOC_CREDOPT) {
thisopt = TL_SETCRED;
otheropt = TL_SETUCRED;
} else {
/* FALLTHROUGH */
case TL_IOC_UCREDOPT:
thisopt = TL_SETUCRED;
otheropt = TL_SETCRED;
}
/*
* The credentials passing does not apply to sockets.
* Only one of the cred options can be set at a given time.
*/
if (IS_SOCKET(tep) || (tep->te_flag & otheropt)) {
miocnak(wq, mp, 0, EINVAL);
return;
}
/*
* Turn on generation of credential options for
* T_conn_req, T_conn_con, T_unidata_ind.
*/
error = miocpullup(mp, sizeof (uint32_t));
if (error != 0) {
miocnak(wq, mp, 0, error);
return;
}
if (!IS_P2ALIGNED(mp->b_cont->b_rptr, sizeof (uint32_t))) {
miocnak(wq, mp, 0, EINVAL);
return;
}
if (*(uint32_t *)mp->b_cont->b_rptr)
tep->te_flag |= thisopt;
else
tep->te_flag &= ~thisopt;
miocack(wq, mp, 0, 0);
break;
default:
/* Should not be here */
miocnak(wq, mp, 0, EINVAL);
break;
}
}
/*
* send T_ERROR_ACK
* Note: assumes enough memory or caller passed big enough mp
* - no recovery from allocb failures
*/
static void
tl_error_ack(queue_t *wq, mblk_t *mp, t_scalar_t tli_err,
t_scalar_t unix_err, t_scalar_t type)
{
struct T_error_ack *err_ack;
mblk_t *ackmp = tpi_ack_alloc(mp, sizeof (struct T_error_ack),
M_PCPROTO, T_ERROR_ACK);
if (ackmp == NULL) {
(void) (STRLOG(TL_ID, 0, 1, SL_TRACE|SL_ERROR,
"tl_error_ack:out of mblk memory"));
tl_merror(wq, NULL, ENOSR);
return;
}
err_ack = (struct T_error_ack *)ackmp->b_rptr;
err_ack->ERROR_prim = type;
err_ack->TLI_error = tli_err;
err_ack->UNIX_error = unix_err;
/*
* send error ack message
*/
qreply(wq, ackmp);
}
/*
* send T_OK_ACK
* Note: assumes enough memory or caller passed big enough mp
* - no recovery from allocb failures
*/
static void
tl_ok_ack(queue_t *wq, mblk_t *mp, t_scalar_t type)
{
struct T_ok_ack *ok_ack;
mblk_t *ackmp = tpi_ack_alloc(mp, sizeof (struct T_ok_ack),
M_PCPROTO, T_OK_ACK);
if (ackmp == NULL) {
tl_merror(wq, NULL, ENOMEM);
return;
}
ok_ack = (struct T_ok_ack *)ackmp->b_rptr;
ok_ack->CORRECT_prim = type;
(void) qreply(wq, ackmp);
}
/*
* Process T_BIND_REQ and O_T_BIND_REQ from serializer.
* This is a wrapper around tl_bind().
*/
static void
tl_bind_ser(mblk_t *mp, tl_endpt_t *tep)
{
if (! tep->te_closing)
tl_bind(mp, tep);
else
freemsg(mp);
tl_serializer_exit(tep);
tl_refrele(tep);
}
/*
* Process T_BIND_REQ and O_T_BIND_REQ TPI requests.
* Assumes that the endpoint is in the unbound.
*/
static void
tl_bind(mblk_t *mp, tl_endpt_t *tep)
{
queue_t *wq = tep->te_wq;
struct T_bind_ack *b_ack;
struct T_bind_req *bind = (struct T_bind_req *)mp->b_rptr;
mblk_t *ackmp, *bamp;
soux_addr_t ux_addr;
t_uscalar_t qlen = 0;
t_scalar_t alen, aoff;
tl_addr_t addr_req;
void *addr_startp;
ssize_t msz = MBLKL(mp), basize;
t_scalar_t tli_err = 0, unix_err = 0;
t_scalar_t save_prim_type = bind->PRIM_type;
t_scalar_t save_state = tep->te_state;
if (tep->te_state != TS_UNBND) {
(void) (STRLOG(TL_ID, tep->te_minor, 1,
SL_TRACE|SL_ERROR,
"tl_wput:bind_request:out of state, state=%d",
tep->te_state));
tli_err = TOUTSTATE;
goto error;
}
if (msz < sizeof (struct T_bind_req)) {
tli_err = TSYSERR; unix_err = EINVAL;
goto error;
}
tep->te_state = NEXTSTATE(TE_BIND_REQ, tep->te_state);
ASSERT((bind->PRIM_type == O_T_BIND_REQ) ||
(bind->PRIM_type == T_BIND_REQ));
alen = bind->ADDR_length;
aoff = bind->ADDR_offset;
/* negotiate max conn req pending */
if (IS_COTS(tep)) {
qlen = bind->CONIND_number;
if (qlen > tl_maxqlen)
qlen = tl_maxqlen;
}
/*
* Reserve hash handle. It can only be NULL if the endpoint is unbound
* and bound again.
*/
if ((tep->te_hash_hndl == NULL) &&
((tep->te_flag & TL_ADDRHASHED) == 0) &&
mod_hash_reserve_nosleep(tep->te_addrhash,
&tep->te_hash_hndl) != 0) {
tli_err = TSYSERR; unix_err = ENOSR;
goto error;
}
/*
* Verify address correctness.
*/
if (IS_SOCKET(tep)) {
ASSERT(bind->PRIM_type == O_T_BIND_REQ);
if ((alen != TL_SOUX_ADDRLEN) ||
(aoff < 0) ||
(aoff + alen > msz)) {
(void) (STRLOG(TL_ID, tep->te_minor,
1, SL_TRACE|SL_ERROR,
"tl_bind: invalid socket addr"));
tep->te_state = NEXTSTATE(TE_ERROR_ACK, tep->te_state);
tli_err = TSYSERR; unix_err = EINVAL;
goto error;
}
/* Copy address from message to local buffer. */
bcopy(mp->b_rptr + aoff, &ux_addr, sizeof (ux_addr));
/*
* Check that we got correct address from sockets
*/
if ((ux_addr.soua_magic != SOU_MAGIC_EXPLICIT) &&
(ux_addr.soua_magic != SOU_MAGIC_IMPLICIT)) {
(void) (STRLOG(TL_ID, tep->te_minor,
1, SL_TRACE|SL_ERROR,
"tl_bind: invalid socket magic"));
tep->te_state = NEXTSTATE(TE_ERROR_ACK, tep->te_state);
tli_err = TSYSERR; unix_err = EINVAL;
goto error;
}
if ((ux_addr.soua_magic == SOU_MAGIC_IMPLICIT) &&
(ux_addr.soua_vp != NULL)) {
(void) (STRLOG(TL_ID, tep->te_minor,
1, SL_TRACE|SL_ERROR,
"tl_bind: implicit addr non-empty"));
tep->te_state = NEXTSTATE(TE_ERROR_ACK, tep->te_state);
tli_err = TSYSERR; unix_err = EINVAL;
goto error;
}
if ((ux_addr.soua_magic == SOU_MAGIC_EXPLICIT) &&
(ux_addr.soua_vp == NULL)) {
(void) (STRLOG(TL_ID, tep->te_minor,
1, SL_TRACE|SL_ERROR,
"tl_bind: explicit addr empty"));
tep->te_state = NEXTSTATE(TE_ERROR_ACK, tep->te_state);
tli_err = TSYSERR; unix_err = EINVAL;
goto error;
}
} else {
if ((alen > 0) && ((aoff < 0) ||
((ssize_t)(aoff + alen) > msz) ||
((aoff + alen) < 0))) {
(void) (STRLOG(TL_ID, tep->te_minor,
1, SL_TRACE|SL_ERROR,
"tl_bind: invalid message"));
tep->te_state = NEXTSTATE(TE_ERROR_ACK, tep->te_state);
tli_err = TSYSERR; unix_err = EINVAL;
goto error;
}
if ((alen < 0) || (alen > (msz - sizeof (struct T_bind_req)))) {
(void) (STRLOG(TL_ID, tep->te_minor,
1, SL_TRACE|SL_ERROR,
"tl_bind: bad addr in message"));
tep->te_state = NEXTSTATE(TE_ERROR_ACK, tep->te_state);
tli_err = TBADADDR;
goto error;
}
#ifdef DEBUG
/*
* Mild form of ASSERT()ion to detect broken TPI apps.
* if (! assertion)
* log warning;
*/
if (! ((alen == 0 && aoff == 0) ||
(aoff >= (t_scalar_t)(sizeof (struct T_bind_req))))) {
(void) (STRLOG(TL_ID, tep->te_minor,
3, SL_TRACE|SL_ERROR,
"tl_bind: addr overlaps TPI message"));
}
#endif
}
/*
* Bind the address provided or allocate one if requested.
* Allow rebinds with a new qlen value.
*/
if (IS_SOCKET(tep)) {
/*
* For anonymous requests the te_ap is already set up properly
* so use minor number as an address.
* For explicit requests need to check whether the address is
* already in use.
*/
if (ux_addr.soua_magic == SOU_MAGIC_EXPLICIT) {
int rc;
if (tep->te_flag & TL_ADDRHASHED) {
ASSERT(IS_COTS(tep) && tep->te_qlen == 0);
if (tep->te_vp == ux_addr.soua_vp)
goto skip_addr_bind;
else /* Rebind to a new address. */
tl_addr_unbind(tep);
}
/*
* Insert address in the hash if it is not already
* there. Since we use preallocated handle, the insert
* can fail only if the key is already present.
*/
rc = mod_hash_insert_reserve(tep->te_addrhash,
(mod_hash_key_t)ux_addr.soua_vp,
(mod_hash_val_t)tep, tep->te_hash_hndl);
if (rc != 0) {
ASSERT(rc == MH_ERR_DUPLICATE);
/*
* Violate O_T_BIND_REQ semantics and fail with
* TADDRBUSY - sockets will not use any address
* other than supplied one for explicit binds.
*/
(void) (STRLOG(TL_ID, tep->te_minor, 1,
SL_TRACE|SL_ERROR,
"tl_bind:requested addr %p is busy",
ux_addr.soua_vp));
tli_err = TADDRBUSY; unix_err = 0;
goto error;
}
tep->te_uxaddr = ux_addr;
tep->te_flag |= TL_ADDRHASHED;
tep->te_hash_hndl = NULL;
}
} else if (alen == 0) {
/*
* assign any free address
*/
if (! tl_get_any_addr(tep, NULL)) {
(void) (STRLOG(TL_ID, tep->te_minor,
1, SL_TRACE|SL_ERROR,
"tl_bind:failed to get buffer for any "
"address"));
tli_err = TSYSERR; unix_err = ENOSR;
goto error;
}
} else {
addr_req.ta_alen = alen;
addr_req.ta_abuf = (mp->b_rptr + aoff);
addr_req.ta_zoneid = tep->te_zoneid;
tep->te_abuf = kmem_zalloc((size_t)alen, KM_NOSLEEP);
if (tep->te_abuf == NULL) {
tli_err = TSYSERR; unix_err = ENOSR;
goto error;
}
bcopy(addr_req.ta_abuf, tep->te_abuf, addr_req.ta_alen);
tep->te_alen = alen;
if (mod_hash_insert_reserve(tep->te_addrhash,
(mod_hash_key_t)&tep->te_ap, (mod_hash_val_t)tep,
tep->te_hash_hndl) != 0) {
if (save_prim_type == T_BIND_REQ) {
/*
* The bind semantics for this primitive
* require a failure if the exact address
* requested is busy
*/
(void) (STRLOG(TL_ID, tep->te_minor, 1,
SL_TRACE|SL_ERROR,
"tl_bind:requested addr is busy"));
tli_err = TADDRBUSY; unix_err = 0;
goto error;
}
/*
* O_T_BIND_REQ semantics say if address if requested
* address is busy, bind to any available free address
*/
if (! tl_get_any_addr(tep, &addr_req)) {
(void) (STRLOG(TL_ID, tep->te_minor, 1,
SL_TRACE|SL_ERROR,
"tl_bind:unable to get any addr buf"));
tli_err = TSYSERR; unix_err = ENOMEM;
goto error;
}
} else {
tep->te_flag |= TL_ADDRHASHED;
tep->te_hash_hndl = NULL;
}
}
ASSERT(tep->te_alen >= 0);
skip_addr_bind:
/*
* prepare T_BIND_ACK TPI message
*/
basize = sizeof (struct T_bind_ack) + tep->te_alen;
bamp = reallocb(mp, basize, 0);
if (bamp == NULL) {
(void) (STRLOG(TL_ID, tep->te_minor, 1, SL_TRACE|SL_ERROR,
"tl_wput:tl_bind: allocb failed"));
/*
* roll back state changes
*/
tl_addr_unbind(tep);
tep->te_state = TS_UNBND;
tl_memrecover(wq, mp, basize);
return;
}
DB_TYPE(bamp) = M_PCPROTO;
bamp->b_wptr = bamp->b_rptr + basize;
b_ack = (struct T_bind_ack *)bamp->b_rptr;
b_ack->PRIM_type = T_BIND_ACK;
b_ack->CONIND_number = qlen;
b_ack->ADDR_length = tep->te_alen;
b_ack->ADDR_offset = (t_scalar_t)sizeof (struct T_bind_ack);
addr_startp = bamp->b_rptr + b_ack->ADDR_offset;
bcopy(tep->te_abuf, addr_startp, tep->te_alen);
if (IS_COTS(tep)) {
tep->te_qlen = qlen;
if (qlen > 0)
tep->te_flag |= TL_LISTENER;
}
tep->te_state = NEXTSTATE(TE_BIND_ACK, tep->te_state);
/*
* send T_BIND_ACK message
*/
(void) qreply(wq, bamp);
return;
error:
ackmp = reallocb(mp, sizeof (struct T_error_ack), 0);
if (ackmp == NULL) {
/*
* roll back state changes
*/
tep->te_state = save_state;
tl_memrecover(wq, mp, sizeof (struct T_error_ack));
return;
}
tep->te_state = NEXTSTATE(TE_ERROR_ACK, tep->te_state);
tl_error_ack(wq, ackmp, tli_err, unix_err, save_prim_type);
}
/*
* Process T_UNBIND_REQ.
* Called from serializer.
*/
static void
tl_unbind(mblk_t *mp, tl_endpt_t *tep)
{
queue_t *wq;
mblk_t *ackmp;
if (tep->te_closing) {
freemsg(mp);
return;
}
wq = tep->te_wq;
/*
* preallocate memory for max of T_OK_ACK and T_ERROR_ACK
* ==> allocate for T_ERROR_ACK (known max)
*/
if ((ackmp = reallocb(mp, sizeof (struct T_error_ack), 0)) == NULL) {
tl_memrecover(wq, mp, sizeof (struct T_error_ack));
return;
}
/*
* memory resources committed
* Note: no message validation. T_UNBIND_REQ message is
* same size as PRIM_type field so already verified earlier.
*/
/*
* validate state
*/
if (tep->te_state != TS_IDLE) {
(void) (STRLOG(TL_ID, tep->te_minor, 1,
SL_TRACE|SL_ERROR,
"tl_wput:T_UNBIND_REQ:out of state, state=%d",
tep->te_state));
tl_error_ack(wq, ackmp, TOUTSTATE, 0, T_UNBIND_REQ);
return;
}
tep->te_state = NEXTSTATE(TE_UNBIND_REQ, tep->te_state);
/*
* TPI says on T_UNBIND_REQ:
* send up a M_FLUSH to flush both
* read and write queues
*/
(void) putnextctl1(RD(wq), M_FLUSH, FLUSHRW);
if (! IS_SOCKET(tep) || !IS_CLTS(tep) || tep->te_qlen != 0 ||
tep->te_magic != SOU_MAGIC_EXPLICIT) {
/*
* Sockets use bind with qlen==0 followed by bind() to
* the same address with qlen > 0 for listeners.
* We allow rebind with a new qlen value.
*/
tl_addr_unbind(tep);
}
tep->te_state = NEXTSTATE(TE_OK_ACK1, tep->te_state);
/*
* send T_OK_ACK
*/
tl_ok_ack(wq, ackmp, T_UNBIND_REQ);
}
/*
* Option management code from drv/ip is used here
* Note: TL_PROT_LEVEL/TL_IOC_CREDOPT option is not part of tl_opt_arr
* database of options. So optcom_req() will fail T_SVR4_OPTMGMT_REQ.
* However, that is what we want as that option is 'unorthodox'
* and only valid in T_CONN_IND, T_CONN_CON and T_UNITDATA_IND
* and not in T_SVR4_OPTMGMT_REQ/ACK
* Note2: use of optcom_req means this routine is an exception to
* recovery from allocb() failures.
*/
static void
tl_optmgmt(queue_t *wq, mblk_t *mp)
{
tl_endpt_t *tep;
mblk_t *ackmp;
union T_primitives *prim;
cred_t *cr;
tep = (tl_endpt_t *)wq->q_ptr;
prim = (union T_primitives *)mp->b_rptr;
/*
* All Solaris components should pass a db_credp
* for this TPI message, hence we ASSERT.
* But in case there is some other M_PROTO that looks
* like a TPI message sent by some other kernel
* component, we check and return an error.
*/
cr = msg_getcred(mp, NULL);
ASSERT(cr != NULL);
if (cr == NULL) {
tl_error_ack(wq, mp, TSYSERR, EINVAL, prim->type);
return;
}
/* all states OK for AF_UNIX options ? */
if (!IS_SOCKET(tep) && tep->te_state != TS_IDLE &&
prim->type == T_SVR4_OPTMGMT_REQ) {
/*
* Broken TLI semantics that options can only be managed
* in TS_IDLE state. Needed for Sparc ABI test suite that
* tests this TLI (mis)feature using this device driver.
*/
(void) (STRLOG(TL_ID, tep->te_minor, 1,
SL_TRACE|SL_ERROR,
"tl_wput:T_SVR4_OPTMGMT_REQ:out of state, state=%d",
tep->te_state));
/*
* preallocate memory for T_ERROR_ACK
*/
ackmp = allocb(sizeof (struct T_error_ack), BPRI_MED);
if (! ackmp) {
tl_memrecover(wq, mp, sizeof (struct T_error_ack));
return;
}
tl_error_ack(wq, ackmp, TOUTSTATE, 0, T_SVR4_OPTMGMT_REQ);
freemsg(mp);
return;
}
/*
* call common option management routine from drv/ip
*/
if (prim->type == T_SVR4_OPTMGMT_REQ) {
svr4_optcom_req(wq, mp, cr, &tl_opt_obj);
} else {
ASSERT(prim->type == T_OPTMGMT_REQ);
tpi_optcom_req(wq, mp, cr, &tl_opt_obj);
}
}
/*
* Handle T_conn_req - the driver part of accept().
* If TL_SET[U]CRED generate the credentials options.
* If this is a socket pass through options unmodified.
* For sockets generate the T_CONN_CON here instead of
* waiting for the T_CONN_RES.
*/
static void
tl_conn_req(queue_t *wq, mblk_t *mp)
{
tl_endpt_t *tep = (tl_endpt_t *)wq->q_ptr;
struct T_conn_req *creq = (struct T_conn_req *)mp->b_rptr;
ssize_t msz = MBLKL(mp);
t_scalar_t alen, aoff, olen, ooff, err = 0;
tl_endpt_t *peer_tep = NULL;
mblk_t *ackmp;
mblk_t *dimp;
struct T_discon_ind *di;
soux_addr_t ux_addr;
tl_addr_t dst;
ASSERT(IS_COTS(tep));
if (tep->te_closing) {
freemsg(mp);
return;
}
/*
* preallocate memory for:
* 1. max of T_ERROR_ACK and T_OK_ACK
* ==> known max T_ERROR_ACK
* 2. max of T_DISCON_IND and T_CONN_IND
*/
ackmp = allocb(sizeof (struct T_error_ack), BPRI_MED);
if (! ackmp) {
tl_memrecover(wq, mp, sizeof (struct T_error_ack));
return;
}
/*
* memory committed for T_OK_ACK/T_ERROR_ACK now
* will be committed for T_DISCON_IND/T_CONN_IND later
*/
if (tep->te_state != TS_IDLE) {
(void) (STRLOG(TL_ID, tep->te_minor, 1,
SL_TRACE|SL_ERROR,
"tl_wput:T_CONN_REQ:out of state, state=%d",
tep->te_state));
tl_error_ack(wq, ackmp, TOUTSTATE, 0, T_CONN_REQ);
freemsg(mp);
return;
}
/*
* validate the message
* Note: dereference fields in struct inside message only
* after validating the message length.
*/
if (msz < sizeof (struct T_conn_req)) {
(void) (STRLOG(TL_ID, tep->te_minor, 1, SL_TRACE|SL_ERROR,
"tl_conn_req:invalid message length"));
tl_error_ack(wq, ackmp, TSYSERR, EINVAL, T_CONN_REQ);
freemsg(mp);
return;
}
alen = creq->DEST_length;
aoff = creq->DEST_offset;
olen = creq->OPT_length;
ooff = creq->OPT_offset;
if (olen == 0)
ooff = 0;
if (IS_SOCKET(tep)) {
if ((alen != TL_SOUX_ADDRLEN) ||
(aoff < 0) ||
(aoff + alen > msz) ||
(alen > msz - sizeof (struct T_conn_req))) {