#include <wintirpc.h>
#include <reentrant.h>
#include <sys/types.h>
#include <rpc/rpc.h>
#include <rpc/svc_dg.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "rpc_com.h"

Include dependency graph for svc_dg.c:

Classes
struct	cache_node

struct	cl_cache

Macros
#define	su_data(xprt) ((struct svc_dg_data *)(xprt->xp_p2))

#define	rpc_buffer(xprt) ((xprt)->xp_p1)

#define	MAX(a, b) (((a) > (b)) ? (a) : (b))

#define	SPARSENESS 4 /* 75% sparse */

#define	ALLOC(type, size) (type ) mem_alloc((sizeof (type) (size)))

#define	MEMZERO(addr, type, size) (void) memset((void ) (addr), 0, sizeof (type) (int) (size))

#define	FREE(addr, type, size) mem_free((addr), (sizeof (type) * (size)))

#define	CACHE_LOC(transp, xid)

Typedefs
typedef struct cache_node *	cache_ptr

Functions
static void	svc_dg_ops (SVCXPRT *)

static enum xprt_stat	svc_dg_stat (SVCXPRT *)

static bool_t	svc_dg_recv (SVCXPRT , struct rpc_msg )

static bool_t	svc_dg_reply (SVCXPRT , struct rpc_msg )

static bool_t	svc_dg_getargs (SVCXPRT , xdrproc_t, void )

static bool_t	svc_dg_freeargs (SVCXPRT , xdrproc_t, void )

static void	svc_dg_destroy (SVCXPRT *)

static bool_t	svc_dg_control (SVCXPRT , const u_int, void )

static int	cache_get (SVCXPRT , struct rpc_msg , char *, size_t )

static void	cache_set (SVCXPRT *, size_t)

int	svc_dg_enablecache (SVCXPRT *, u_int)

SVCXPRT *	svc_dg_create (int fd, u_int sendsize, u_int recvsize)

Variables
static const char	svc_dg_str [] = "svc_dg_create: %s"

static const char	svc_dg_err1 [] = "could not get transport information"

static const char	svc_dg_err2 [] = " transport does not support data transfer"

static const char	__no_mem_str [] = "out of memory"

mutex_t	dupreq_lock

static const char	cache_enable_str [] = "svc_enablecache: %s %s"

static const char	alloc_err [] = "could not allocate cache "

static const char	enable_err [] = "cache already enabled"

static const char	cache_set_str [] = "cache_set: %s"

static const char	cache_set_err1 [] = "victim not found"

static const char	cache_set_err2 [] = "victim alloc failed"

static const char	cache_set_err3 [] = "could not allocate new rpc buffer"

Macro Definition Documentation

◆ ALLOC

#define ALLOC	(	type,
		size
	)	(type ) mem_alloc((sizeof (type) (size)))

Definition at line 321 of file svc_dg.c.

◆ CACHE_LOC

#define CACHE_LOC	(	transp,
		xid
	)

Value:

(xid % (SPARSENESS * ((struct cl_cache *) \

su_data(transp)->su_cache)->uc_size))

xid

LONGLONG xid

Definition: nfs41_driver.c:106

cl_cache

Definition: svc_dg.c:357

cl_cache::uc_size

u_int uc_size

Definition: svc_dg.c:358

su_data

#define su_data(xprt)

Definition: svc_dg.c:61

SPARSENESS

#define SPARSENESS

Definition: svc_dg.c:319

Definition at line 371 of file svc_dg.c.

◆ FREE

#define FREE	(	addr,
		type,
		size
	)	mem_free((addr), (sizeof (type) * (size)))

Definition at line 327 of file svc_dg.c.

◆ MAX

#define MAX	(	a,
		b
	)	(((a) > (b)) ? (a) : (b))

Definition at line 65 of file svc_dg.c.

◆ MEMZERO

#define MEMZERO	(	addr,
		type,
		size
	)	(void) memset((void ) (addr), 0, sizeof (type) (int) (size))

Definition at line 324 of file svc_dg.c.

◆ rpc_buffer

#define rpc_buffer ( xprt ) ((xprt)->xp_p1)

Definition at line 62 of file svc_dg.c.

◆ SPARSENESS

#define SPARSENESS 4 /* 75% sparse */

Definition at line 319 of file svc_dg.c.

◆ su_data

#define su_data ( xprt ) ((struct svc_dg_data *)(xprt->xp_p2))

Definition at line 61 of file svc_dg.c.

Typedef Documentation

◆ cache_ptr

typedef struct cache_node* cache_ptr

Definition at line 333 of file svc_dg.c.

Function Documentation

◆ cache_get()

static int cache_get	(	SVCXPRT *	xprt,
		struct rpc_msg *	msg,
		char **	replyp,
		size_t *	replylenp
	)

static

Definition at line 533 of file svc_dg.c.

{
    u_int loc;
    cache_ptr ent;
    struct svc_dg_data *su = su_data(xprt);
    struct cl_cache *uc = (struct cl_cache *) su->su_cache;
#ifdef RPC_CACHE_DEBUG
    struct netconfig *nconf;
    char *uaddr;
#endif
 
    mutex_lock(&dupreq_lock);
    loc = CACHE_LOC(xprt, su->su_xid);
    for (ent = uc->uc_entries[loc]; ent != NULL; ent = ent->cache_next) {
        if (ent->cache_xid == su->su_xid &&
            ent->cache_proc == msg->rm_call.cb_proc &&
            ent->cache_vers == msg->rm_call.cb_vers &&
            ent->cache_prog == msg->rm_call.cb_prog &&
            ent->cache_addr.len == xprt->xp_rtaddr.len &&
            (memcmp(ent->cache_addr.buf, xprt->xp_rtaddr.buf,
                xprt->xp_rtaddr.len) == 0)) {
#ifdef RPC_CACHE_DEBUG
            if (nconf = getnetconfigent(xprt->xp_netid)) {
                uaddr = taddr2uaddr(nconf, &xprt->xp_rtaddr);
                freenetconfigent(nconf);
                printf(
    "cache entry found for xid=%x prog=%d vers=%d proc=%d for rmtaddr=%s\n",
                    su->su_xid, msg->rm_call.cb_prog,
                    msg->rm_call.cb_vers,
                    msg->rm_call.cb_proc, uaddr);
                free(uaddr);
            }
#endif
            *replyp = ent->cache_reply;
            *replylenp = ent->cache_replylen;
            mutex_unlock(&dupreq_lock);
            return (1);
        }
    }
    /*
     * Failed to find entry
     * Remember a few things so we can do a set later
     */
    uc->uc_proc = msg->rm_call.cb_proc;
    uc->uc_vers = msg->rm_call.cb_vers;
    uc->uc_prog = msg->rm_call.cb_prog;
    mutex_unlock(&dupreq_lock);
    return (0);
}

Referenced by svc_dg_recv().

◆ cache_set()

static void cache_set	(	SVCXPRT *	xprt,
		size_t	replylen
	)

static

Definition at line 443 of file svc_dg.c.

{
    cache_ptr victim;
    cache_ptr *vicp;
    struct svc_dg_data *su = su_data(xprt);
    struct cl_cache *uc = (struct cl_cache *) su->su_cache;
    u_int loc;
    char *newbuf;
#ifdef RPC_CACHE_DEBUG
    struct netconfig *nconf;
    char *uaddr;
#endif
 
    mutex_lock(&dupreq_lock);
    /*
     * Find space for the new entry, either by
     * reusing an old entry, or by mallocing a new one
     */
    victim = uc->uc_fifo[uc->uc_nextvictim];
    if (victim != NULL) {
        loc = CACHE_LOC(xprt, victim->cache_xid);
        for (vicp = &uc->uc_entries[loc];
            *vicp != NULL && *vicp != victim;
            vicp = &(*vicp)->cache_next)
            ;
        if (*vicp == NULL) {
            // XXX warnx(cache_set_str, cache_set_err1);
            mutex_unlock(&dupreq_lock);
            return;
        }
        *vicp = victim->cache_next; /* remove from cache */
        newbuf = victim->cache_reply;
    } else {
        victim = ALLOC(struct cache_node, 1);
        if (victim == NULL) {
            // XXX warnx(cache_set_str, cache_set_err2);
            mutex_unlock(&dupreq_lock);
            return;
        }
        newbuf = mem_alloc(su->su_iosz);
        if (newbuf == NULL) {
            // XXX warnx(cache_set_str, cache_set_err3);
            FREE(victim, struct cache_node, 1);
            mutex_unlock(&dupreq_lock);
            return;
        }
    }
 
    /*
     * Store it away
     */
#ifdef RPC_CACHE_DEBUG
    if (nconf = getnetconfigent(xprt->xp_netid)) {
        uaddr = taddr2uaddr(nconf, &xprt->xp_rtaddr);
        freenetconfigent(nconf);
        printf(
    "cache set for xid= %x prog=%d vers=%d proc=%d for rmtaddr=%s\n",
            su->su_xid, uc->uc_prog, uc->uc_vers,
            uc->uc_proc, uaddr);
        free(uaddr);
    }
#endif
    victim->cache_replylen = replylen;
    victim->cache_reply = rpc_buffer(xprt);
    rpc_buffer(xprt) = newbuf;
    xdrmem_create(&(su->su_xdrs), rpc_buffer(xprt),
            su->su_iosz, XDR_ENCODE);
    victim->cache_xid = su->su_xid;
    victim->cache_proc = uc->uc_proc;
    victim->cache_vers = uc->uc_vers;
    victim->cache_prog = uc->uc_prog;
    victim->cache_addr = xprt->xp_rtaddr;
    victim->cache_addr.buf = ALLOC(char, xprt->xp_rtaddr.len);
    (void) memcpy(victim->cache_addr.buf, xprt->xp_rtaddr.buf,
        (size_t)xprt->xp_rtaddr.len);
    loc = CACHE_LOC(xprt, victim->cache_xid);
    victim->cache_next = uc->uc_entries[loc];
    uc->uc_entries[loc] = victim;
    uc->uc_fifo[uc->uc_nextvictim++] = victim;
    uc->uc_nextvictim %= uc->uc_size;
    mutex_unlock(&dupreq_lock);
}

Referenced by svc_dg_reply().

◆ svc_dg_control()

static bool_t svc_dg_control	(	SVCXPRT *	xprt,
		const u_int	rq,
		void *	in
	)

static

Definition at line 275 of file svc_dg.c.

{
    return (FALSE);
}

Referenced by svc_dg_ops().

◆ svc_dg_create()

SVCXPRT * svc_dg_create	(	int	fd,
		u_int	sendsize,
		u_int	recvsize
	)

Definition at line 95 of file svc_dg.c.

{
    SVCXPRT *xprt;
    struct svc_dg_data *su = NULL;
    struct __rpc_sockinfo si;
    struct sockaddr_storage ss;
    socklen_t slen;
 
    if (!__rpc_fd2sockinfo(fd, &si)) {
        // XXX warnx(svc_dg_str, svc_dg_err1);
        return (NULL);
    }
    /*
     * Find the receive and the send size
     */
    sendsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)sendsize);
    recvsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)recvsize);
    if ((sendsize == 0) || (recvsize == 0)) {
        // XXX warnx(svc_dg_str, svc_dg_err2);
        return (NULL);
    }
 
    xprt = mem_alloc(sizeof (SVCXPRT));
    if (xprt == NULL)
        goto freedata;
    memset(xprt, 0, sizeof (SVCXPRT));
 
    su = mem_alloc(sizeof (*su));
    if (su == NULL)
        goto freedata;
    su->su_iosz = ((MAX(sendsize, recvsize) + 3) / 4) * 4;
    if ((rpc_buffer(xprt) = mem_alloc(su->su_iosz)) == NULL)
        goto freedata;
    xdrmem_create(&(su->su_xdrs), rpc_buffer(xprt), su->su_iosz,
        XDR_DECODE);
    su->su_cache = NULL;
    xprt->xp_fd = fd;
    xprt->xp_p2 = su;
    xprt->xp_verf.oa_base = su->su_verfbody;
    svc_dg_ops(xprt);
    xprt->xp_rtaddr.maxlen = sizeof (struct sockaddr_storage);
 
    slen = sizeof ss;
    if (getsockname(fd, (struct sockaddr *)(void *)&ss, &slen) == SOCKET_ERROR)
        goto freedata;
    __rpc_set_netbuf(&xprt->xp_ltaddr, &ss, slen);
 
    xprt_register(xprt);
    return (xprt);
freedata:
    // XXX (void) warnx(svc_dg_str, __no_mem_str);
    if (xprt) {
        if (su)
            (void) mem_free(su, sizeof (*su));
        (void) mem_free(xprt, sizeof (SVCXPRT));
    }
    return (NULL);
}

Referenced by svc_tli_create().

◆ svc_dg_destroy()

static void svc_dg_destroy ( SVCXPRT * xprt )

static

Definition at line 253 of file svc_dg.c.

{
    struct svc_dg_data *su = su_data(xprt);
 
    xprt_unregister(xprt);
    if (xprt->xp_fd != -1)
        (void)closesocket(xprt->xp_fd);
    XDR_DESTROY(&(su->su_xdrs));
    (void) mem_free(rpc_buffer(xprt), su->su_iosz);
    (void) mem_free(su, sizeof (*su));
    if (xprt->xp_rtaddr.buf)
        (void) mem_free(xprt->xp_rtaddr.buf, xprt->xp_rtaddr.maxlen);
    if (xprt->xp_ltaddr.buf)
        (void) mem_free(xprt->xp_ltaddr.buf, xprt->xp_ltaddr.maxlen);
    if (xprt->xp_tp)
        (void) free(xprt->xp_tp);
    (void) mem_free(xprt, sizeof (SVCXPRT));
}

Referenced by svc_dg_ops().

◆ svc_dg_enablecache()

int svc_dg_enablecache	(	SVCXPRT *	transp,
		u_int	size
	)

Definition at line 386 of file svc_dg.c.

{
    struct svc_dg_data *su = su_data(transp);
    struct cl_cache *uc;
 
    mutex_lock(&dupreq_lock);
    if (su->su_cache != NULL) {
        // XXX (void) warnx(cache_enable_str, enable_err, " ");
        mutex_unlock(&dupreq_lock);
        return (0);
    }
    uc = ALLOC(struct cl_cache, 1);
    if (uc == NULL) {
        // XXX warnx(cache_enable_str, alloc_err, " ");
        mutex_unlock(&dupreq_lock);
        return (0);
    }
    uc->uc_size = size;
    uc->uc_nextvictim = 0;
    uc->uc_entries = ALLOC(cache_ptr, size * SPARSENESS);
    if (uc->uc_entries == NULL) {
        // XXX warnx(cache_enable_str, alloc_err, "data");
        FREE(uc, struct cl_cache, 1);
        mutex_unlock(&dupreq_lock);
        return (0);
    }
    MEMZERO(uc->uc_entries, cache_ptr, size * SPARSENESS);
    uc->uc_fifo = ALLOC(cache_ptr, size);
    if (uc->uc_fifo == NULL) {
        // XXX warnx(cache_enable_str, alloc_err, "fifo");
        FREE(uc->uc_entries, cache_ptr, size * SPARSENESS);
        FREE(uc, struct cl_cache, 1);
        mutex_unlock(&dupreq_lock);
        return (0);
    }
    MEMZERO(uc->uc_fifo, cache_ptr, size);
    su->su_cache = (char *)(void *)uc;
    mutex_unlock(&dupreq_lock);
    return (1);
}

◆ svc_dg_freeargs()

static bool_t svc_dg_freeargs	(	SVCXPRT *	xprt,
		xdrproc_t	xdr_args,
		void *	args_ptr
	)

static

Definition at line 241 of file svc_dg.c.

{
    XDR *xdrs = &(su_data(xprt)->su_xdrs);
 
    xdrs->x_op = XDR_FREE;
    return (*xdr_args)(xdrs, args_ptr);
}

Referenced by svc_dg_ops().

◆ svc_dg_getargs()

static bool_t svc_dg_getargs	(	SVCXPRT *	xprt,
		xdrproc_t	xdr_args,
		void *	args_ptr
	)

static

Definition at line 232 of file svc_dg.c.

{
    return (*xdr_args)(&(su_data(xprt)->su_xdrs), args_ptr);
}

Referenced by svc_dg_ops().

◆ svc_dg_ops()

static void svc_dg_ops ( SVCXPRT * xprt )

static

Definition at line 284 of file svc_dg.c.

{
    static struct xp_ops ops;
    static struct xp_ops2 ops2;
    extern mutex_t ops_lock;
 
/* VARIABLES PROTECTED BY ops_lock: ops */
 
    mutex_lock(&ops_lock);
    if (ops.xp_recv == NULL) {
        ops.xp_recv = svc_dg_recv;
        ops.xp_stat = svc_dg_stat;
        ops.xp_getargs = svc_dg_getargs;
        ops.xp_reply = svc_dg_reply;
        ops.xp_freeargs = svc_dg_freeargs;
        ops.xp_destroy = svc_dg_destroy;
        ops2.xp_control = svc_dg_control;
    }
    xprt->xp_ops = &ops;
    xprt->xp_ops2 = &ops2;
    mutex_unlock(&ops_lock);
}

Referenced by svc_dg_create().

◆ svc_dg_recv()

static bool_t svc_dg_recv	(	SVCXPRT *	xprt,
		struct rpc_msg *	msg
	)

static

Definition at line 166 of file svc_dg.c.

{
    struct svc_dg_data *su = su_data(xprt);
    XDR *xdrs = &(su->su_xdrs);
    char *reply;
    struct sockaddr_storage ss;
    socklen_t alen;
    size_t replylen;
    ssize_t rlen;
 
again:
    alen = sizeof (struct sockaddr_storage);
    rlen = recvfrom(xprt->xp_fd, rpc_buffer(xprt), su->su_iosz, 0,
        (struct sockaddr *)(void *)&ss, &alen);
    if (rlen == -1 && errno == EINTR)
        goto again;
    if (rlen == -1 || (rlen < (ssize_t)(4 * sizeof (u_int32_t))))
        return (FALSE);
    __rpc_set_netbuf(&xprt->xp_rtaddr, &ss, alen);
 
    __xprt_set_raddr(xprt, &ss);
    xdrs->x_op = XDR_DECODE;
    XDR_SETPOS(xdrs, 0);
    if (! xdr_callmsg(xdrs, msg)) {
        return (FALSE);
    }
    su->su_xid = msg->rm_xid;
    if (su->su_cache != NULL) {
        if (cache_get(xprt, msg, &reply, &replylen)) {
            (void)sendto(xprt->xp_fd, reply, replylen, 0,
                (struct sockaddr *)(void *)&ss, alen);
            return (FALSE);
        }
    }
    return (TRUE);
}

Referenced by svc_dg_ops().

◆ svc_dg_reply()

static bool_t svc_dg_reply	(	SVCXPRT *	xprt,
		struct rpc_msg *	msg
	)

static

Definition at line 206 of file svc_dg.c.

{
    struct svc_dg_data *su = su_data(xprt);
    XDR *xdrs = &(su->su_xdrs);
    bool_t stat = FALSE;
    size_t slen;
 
    xdrs->x_op = XDR_ENCODE;
    XDR_SETPOS(xdrs, 0);
    msg->rm_xid = su->su_xid;
    if (xdr_replymsg(xdrs, msg)) {
        slen = XDR_GETPOS(xdrs);
        if (sendto(xprt->xp_fd, rpc_buffer(xprt), slen, 0,
            (struct sockaddr *)xprt->xp_rtaddr.buf,
            (socklen_t)xprt->xp_rtaddr.len) == (ssize_t) slen) {
            stat = TRUE;
            if (su->su_cache)
                cache_set(xprt, slen);
        }
    }
    return (stat);
}

Referenced by svc_dg_ops().

◆ svc_dg_stat()

static enum xprt_stat svc_dg_stat ( SVCXPRT * xprt )

static

Definition at line 159 of file svc_dg.c.

{
    return (XPRT_IDLE);
}

Referenced by svc_dg_ops().

Variable Documentation

◆ __no_mem_str

const char __no_mem_str[] = "out of memory"

static

Definition at line 92 of file svc_dg.c.

◆ alloc_err

const char alloc_err[] = "could not allocate cache "

static

Definition at line 382 of file svc_dg.c.

◆ cache_enable_str

const char cache_enable_str[] = "svc_enablecache: %s %s"

static

Definition at line 381 of file svc_dg.c.

◆ cache_set_err1

const char cache_set_err1[] = "victim not found"

static

Definition at line 438 of file svc_dg.c.

◆ cache_set_err2

const char cache_set_err2[] = "victim alloc failed"

static

Definition at line 439 of file svc_dg.c.

◆ cache_set_err3

const char cache_set_err3[] = "could not allocate new rpc buffer"

static

Definition at line 440 of file svc_dg.c.

◆ cache_set_str

const char cache_set_str[] = "cache_set: %s"

static

Definition at line 437 of file svc_dg.c.

◆ dupreq_lock

mutex_t dupreq_lock

extern

Definition at line 59 of file mt_misc.c.

Referenced by cache_get(), cache_set(), and svc_dg_enablecache().

◆ enable_err

const char enable_err[] = "cache already enabled"

static

Definition at line 383 of file svc_dg.c.

◆ svc_dg_err1

const char svc_dg_err1[] = "could not get transport information"

static

Definition at line 90 of file svc_dg.c.

◆ svc_dg_err2

const char svc_dg_err2[] = " transport does not support data transfer"

static

Definition at line 91 of file svc_dg.c.

◆ svc_dg_str

const char svc_dg_str[] = "svc_dg_create: %s"

static

Definition at line 89 of file svc_dg.c.

Classes

Macros

Typedefs

Functions

Variables

Macro Definition Documentation

◆ ALLOC

◆ CACHE_LOC

◆ FREE

◆ MAX

◆ MEMZERO

◆ rpc_buffer

◆ SPARSENESS

◆ su_data

Typedef Documentation

◆ cache_ptr

Function Documentation

◆ cache_get()

◆ cache_set()

◆ svc_dg_control()

◆ svc_dg_create()

◆ svc_dg_destroy()

◆ svc_dg_enablecache()

◆ svc_dg_freeargs()

◆ svc_dg_getargs()

◆ svc_dg_ops()

◆ svc_dg_recv()

◆ svc_dg_reply()

◆ svc_dg_stat()

Variable Documentation

◆ __no_mem_str

◆ alloc_err

◆ cache_enable_str

◆ cache_set_err1

◆ cache_set_err2

◆ cache_set_err3

◆ cache_set_str

◆ dupreq_lock

◆ enable_err

◆ svc_dg_err1

◆ svc_dg_err2

◆ svc_dg_str