/*
* Process the RPC request.
*/
int
svc_process(struct svc_rqst *rqstp)
{
struct kvec *argv = &rqstp->rq_arg.head[0];
struct kvec *resv = &rqstp->rq_res.head[0];
struct svc_serv *serv = rqstp->rq_server;
u32 dir;
/*
* Setup response xdr_buf.
* Initially it has just one page
*/
rqstp->rq_next_page = &rqstp->rq_respages[1];
resv->iov_base = page_address(rqstp->rq_respages[0]);
resv->iov_len = 0;
rqstp->rq_res.pages = rqstp->rq_respages + 1;
rqstp->rq_res.len = 0;
rqstp->rq_res.page_base = 0;
rqstp->rq_res.page_len = 0;
rqstp->rq_res.buflen = PAGE_SIZE;
rqstp->rq_res.tail[0].iov_base = NULL;
rqstp->rq_res.tail[0].iov_len = 0;
dir = svc_getnl(argv);
if (dir != 0) {
/* direction != CALL */
svc_printk(rqstp, "bad direction %d, dropping request\n", dir);
serv->sv_stats->rpcbadfmt++;
goto out_drop;
}
/* Returns 1 for send, 0 for drop */
if (likely(svc_process_common(rqstp, argv, resv))) {
int ret = svc_send(rqstp);
trace_svc_process(rqstp, ret);
return ret;
}
out_drop:
trace_svc_process(rqstp, 0);
svc_drop(rqstp);
return 0;
}
/*
* Process the RPC request.
*/
int
svc_process(struct svc_serv *serv, struct svc_rqst *rqstp)
{
struct svc_program *progp;
struct svc_version *versp = NULL; /* compiler food */
struct svc_procedure *procp = NULL;
struct svc_buf * argp = &rqstp->rq_argbuf;
struct svc_buf * resp = &rqstp->rq_resbuf;
kxdrproc_t xdr;
u32 *bufp, *statp;
u32 dir, prog, vers, proc,
auth_stat, rpc_stat;
rpc_stat = rpc_success;
bufp = argp->buf;
if (argp->len < 5)
goto err_short_len;
dir = ntohl(*bufp++);
vers = ntohl(*bufp++);
/* First words of reply: */
svc_putlong(resp, xdr_one); /* REPLY */
svc_putlong(resp, xdr_zero); /* ACCEPT */
if (dir != 0) /* direction != CALL */
goto err_bad_dir;
if (vers != 2) /* RPC version number */
goto err_bad_rpc;
rqstp->rq_prog = prog = ntohl(*bufp++); /* program number */
rqstp->rq_vers = vers = ntohl(*bufp++); /* version number */
rqstp->rq_proc = proc = ntohl(*bufp++); /* procedure number */
argp->buf += 5;
argp->len -= 5;
/* Used by nfsd to only allow the NULL procedure for amd. */
if (rqstp->rq_auth && !rqstp->rq_client && proc) {
auth_stat = rpc_autherr_badcred;
goto err_bad_auth;
}
/*
* Decode auth data, and add verifier to reply buffer.
* We do this before anything else in order to get a decent
* auth verifier.
*/
svc_authenticate(rqstp, &rpc_stat, &auth_stat);
if (rpc_stat != rpc_success)
goto err_garbage;
if (auth_stat != rpc_auth_ok)
goto err_bad_auth;
progp = serv->sv_program;
if (prog != progp->pg_prog)
goto err_bad_prog;
versp = progp->pg_vers[vers];
if (!versp || vers >= progp->pg_nvers)
goto err_bad_vers;
procp = versp->vs_proc + proc;
if (proc >= versp->vs_nproc || !procp->pc_func)
goto err_bad_proc;
rqstp->rq_server = serv;
rqstp->rq_procinfo = procp;
/* Syntactic check complete */
serv->sv_stats->rpccnt++;
/* Build the reply header. */
statp = resp->buf;
svc_putlong(resp, rpc_success); /* RPC_SUCCESS */
/* Bump per-procedure stats counter */
procp->pc_count++;
/* Initialize storage for argp and resp */
memset(rqstp->rq_argp, 0, procp->pc_argsize);
memset(rqstp->rq_resp, 0, procp->pc_ressize);
/* Call the function that processes the request. */
if (!versp->vs_dispatch) {
/* Decode arguments */
xdr = procp->pc_decode;
if (xdr && !xdr(rqstp, rqstp->rq_argbuf.buf, rqstp->rq_argp))
goto err_garbage;
*statp = procp->pc_func(rqstp, rqstp->rq_argp, rqstp->rq_resp);
/* Encode reply */
if (*statp == rpc_success && (xdr = procp->pc_encode)
&& !xdr(rqstp, rqstp->rq_resbuf.buf, rqstp->rq_resp)) {
dprintk("svc: failed to encode reply\n");
/* serv->sv_stats->rpcsystemerr++; */
*statp = rpc_system_err;
}
} else {
dprintk("svc: calling dispatcher\n");
if (!versp->vs_dispatch(rqstp, statp))
goto dropit;
}
/* Check RPC status result */
if (*statp != rpc_success)
resp->len = statp + 1 - resp->base;
/* Release reply info */
if (procp->pc_release)
procp->pc_release(rqstp, NULL, rqstp->rq_resp);
if (procp->pc_encode == NULL)
goto dropit;
sendit:
return svc_send(rqstp);
dropit:
dprintk("svc: svc_process dropit\n");
svc_drop(rqstp);
return 0;
err_short_len:
#ifdef RPC_PARANOIA
printk("svc: short len %d, dropping request\n", argp->len);
#endif
goto dropit; /* drop request */
err_bad_dir:
#ifdef RPC_PARANOIA
printk("svc: bad direction %d, dropping request\n", dir);
#endif
serv->sv_stats->rpcbadfmt++;
goto dropit; /* drop request */
err_bad_rpc:
serv->sv_stats->rpcbadfmt++;
resp->buf[-1] = xdr_one; /* REJECT */
svc_putlong(resp, xdr_zero); /* RPC_MISMATCH */
svc_putlong(resp, xdr_two); /* Only RPCv2 supported */
svc_putlong(resp, xdr_two);
goto sendit;
err_bad_auth:
dprintk("svc: authentication failed (%ld)\n", ntohl(auth_stat));
serv->sv_stats->rpcbadauth++;
resp->buf[-1] = xdr_one; /* REJECT */
svc_putlong(resp, xdr_one); /* AUTH_ERROR */
svc_putlong(resp, auth_stat); /* status */
goto sendit;
err_bad_prog:
#ifdef RPC_PARANOIA
printk("svc: unknown program %d (me %d)\n", prog, progp->pg_prog);
#endif
serv->sv_stats->rpcbadfmt++;
svc_putlong(resp, rpc_prog_unavail);
goto sendit;
err_bad_vers:
#ifdef RPC_PARANOIA
printk("svc: unknown version (%d)\n", vers);
#endif
serv->sv_stats->rpcbadfmt++;
svc_putlong(resp, rpc_prog_mismatch);
svc_putlong(resp, htonl(progp->pg_lovers));
svc_putlong(resp, htonl(progp->pg_hivers));
goto sendit;
err_bad_proc:
#ifdef RPC_PARANOIA
printk("svc: unknown procedure (%d)\n", proc);
#endif
serv->sv_stats->rpcbadfmt++;
svc_putlong(resp, rpc_proc_unavail);
goto sendit;
err_garbage:
#ifdef RPC_PARANOIA
printk("svc: failed to decode args\n");
#endif
serv->sv_stats->rpcbadfmt++;
svc_putlong(resp, rpc_garbage_args);
goto sendit;
}
/*
* Process the RPC request.
*/
int
svc_process(struct svc_serv *serv, struct svc_rqst *rqstp)
{
struct svc_program *progp;
struct svc_version *versp = NULL; /* compiler food */
struct svc_procedure *procp = NULL;
struct kvec * argv = &rqstp->rq_arg.head[0];
struct kvec * resv = &rqstp->rq_res.head[0];
kxdrproc_t xdr;
u32 *statp;
u32 dir, prog, vers, proc,
auth_stat, rpc_stat;
rpc_stat = rpc_success;
if (argv->iov_len < 6*4)
goto err_short_len;
/* setup response xdr_buf.
* Initially it has just one page
*/
svc_take_page(rqstp); /* must succeed */
resv->iov_base = page_address(rqstp->rq_respages[0]);
resv->iov_len = 0;
rqstp->rq_res.pages = rqstp->rq_respages+1;
rqstp->rq_res.len = 0;
rqstp->rq_res.page_base = 0;
rqstp->rq_res.page_len = 0;
rqstp->rq_res.tail[0].iov_len = 0;
/* tcp needs a space for the record length... */
if (rqstp->rq_prot == IPPROTO_TCP)
svc_putu32(resv, 0);
rqstp->rq_xid = svc_getu32(argv);
svc_putu32(resv, rqstp->rq_xid);
dir = ntohl(svc_getu32(argv));
vers = ntohl(svc_getu32(argv));
/* First words of reply: */
svc_putu32(resv, xdr_one); /* REPLY */
if (dir != 0) /* direction != CALL */
goto err_bad_dir;
if (vers != 2) /* RPC version number */
goto err_bad_rpc;
svc_putu32(resv, xdr_zero); /* ACCEPT */
rqstp->rq_prog = prog = ntohl(svc_getu32(argv)); /* program number */
rqstp->rq_vers = vers = ntohl(svc_getu32(argv)); /* version number */
rqstp->rq_proc = proc = ntohl(svc_getu32(argv)); /* procedure number */
/*
* Decode auth data, and add verifier to reply buffer.
* We do this before anything else in order to get a decent
* auth verifier.
*/
switch (svc_authenticate(rqstp, &auth_stat)) {
case SVC_OK:
break;
case SVC_GARBAGE:
rpc_stat = rpc_garbage_args;
goto err_bad;
case SVC_SYSERR:
rpc_stat = rpc_system_err;
goto err_bad;
case SVC_DENIED:
goto err_bad_auth;
case SVC_DROP:
goto dropit;
case SVC_COMPLETE:
goto sendit;
}
progp = serv->sv_program;
if (prog != progp->pg_prog)
goto err_bad_prog;
if (vers >= progp->pg_nvers ||
!(versp = progp->pg_vers[vers]))
goto err_bad_vers;
procp = versp->vs_proc + proc;
if (proc >= versp->vs_nproc || !procp->pc_func)
goto err_bad_proc;
rqstp->rq_server = serv;
rqstp->rq_procinfo = procp;
/* Syntactic check complete */
serv->sv_stats->rpccnt++;
/* Build the reply header. */
statp = resv->iov_base +resv->iov_len;
svc_putu32(resv, rpc_success); /* RPC_SUCCESS */
/* Bump per-procedure stats counter */
procp->pc_count++;
/* Initialize storage for argp and resp */
memset(rqstp->rq_argp, 0, procp->pc_argsize);
memset(rqstp->rq_resp, 0, procp->pc_ressize);
/* un-reserve some of the out-queue now that we have a
* better idea of reply size
*/
if (procp->pc_xdrressize)
svc_reserve(rqstp, procp->pc_xdrressize<<2);
/* Call the function that processes the request. */
if (!versp->vs_dispatch) {
/* Decode arguments */
xdr = procp->pc_decode;
if (xdr && !xdr(rqstp, argv->iov_base, rqstp->rq_argp))
goto err_garbage;
*statp = procp->pc_func(rqstp, rqstp->rq_argp, rqstp->rq_resp);
/* Encode reply */
if (*statp == rpc_success && (xdr = procp->pc_encode)
&& !xdr(rqstp, resv->iov_base+resv->iov_len, rqstp->rq_resp)) {
dprintk("svc: failed to encode reply\n");
/* serv->sv_stats->rpcsystemerr++; */
*statp = rpc_system_err;
}
} else {
dprintk("svc: calling dispatcher\n");
if (!versp->vs_dispatch(rqstp, statp)) {
/* Release reply info */
if (procp->pc_release)
procp->pc_release(rqstp, NULL, rqstp->rq_resp);
goto dropit;
}
}
/* Check RPC status result */
if (*statp != rpc_success)
resv->iov_len = ((void*)statp) - resv->iov_base + 4;
/* Release reply info */
if (procp->pc_release)
procp->pc_release(rqstp, NULL, rqstp->rq_resp);
if (procp->pc_encode == NULL)
goto dropit;
sendit:
if (svc_authorise(rqstp))
goto dropit;
return svc_send(rqstp);
dropit:
svc_authorise(rqstp); /* doesn't hurt to call this twice */
dprintk("svc: svc_process dropit\n");
svc_drop(rqstp);
return 0;
err_short_len:
#ifdef RPC_PARANOIA
printk("svc: short len %Zd, dropping request\n", argv->iov_len);
#endif
goto dropit; /* drop request */
err_bad_dir:
#ifdef RPC_PARANOIA
printk("svc: bad direction %d, dropping request\n", dir);
#endif
serv->sv_stats->rpcbadfmt++;
goto dropit; /* drop request */
err_bad_rpc:
serv->sv_stats->rpcbadfmt++;
svc_putu32(resv, xdr_one); /* REJECT */
svc_putu32(resv, xdr_zero); /* RPC_MISMATCH */
svc_putu32(resv, xdr_two); /* Only RPCv2 supported */
svc_putu32(resv, xdr_two);
goto sendit;
err_bad_auth:
dprintk("svc: authentication failed (%d)\n", ntohl(auth_stat));
serv->sv_stats->rpcbadauth++;
resv->iov_len -= 4;
svc_putu32(resv, xdr_one); /* REJECT */
svc_putu32(resv, xdr_one); /* AUTH_ERROR */
svc_putu32(resv, auth_stat); /* status */
goto sendit;
err_bad_prog:
#ifdef RPC_PARANOIA
if (prog != 100227 || progp->pg_prog != 100003)
printk("svc: unknown program %d (me %d)\n", prog, progp->pg_prog);
/* else it is just a Solaris client seeing if ACLs are supported */
#endif
serv->sv_stats->rpcbadfmt++;
svc_putu32(resv, rpc_prog_unavail);
goto sendit;
err_bad_vers:
#ifdef RPC_PARANOIA
printk("svc: unknown version (%d)\n", vers);
#endif
serv->sv_stats->rpcbadfmt++;
svc_putu32(resv, rpc_prog_mismatch);
svc_putu32(resv, htonl(progp->pg_lovers));
svc_putu32(resv, htonl(progp->pg_hivers));
goto sendit;
err_bad_proc:
#ifdef RPC_PARANOIA
printk("svc: unknown procedure (%d)\n", proc);
#endif
serv->sv_stats->rpcbadfmt++;
svc_putu32(resv, rpc_proc_unavail);
goto sendit;
err_garbage:
#ifdef RPC_PARANOIA
printk("svc: failed to decode args\n");
#endif
rpc_stat = rpc_garbage_args;
err_bad:
serv->sv_stats->rpcbadfmt++;
svc_putu32(resv, rpc_stat);
goto sendit;
}