GCOV - Varnish Cache


/*-
 * Copyright (c) 2006 Verdens Gang AS
 * Copyright (c) 2006-2015 Varnish Software AS
 * All rights reserved.
 *
 * Author: Poul-Henning Kamp <phk@phk.freebsd.dk>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 */

#include "config.h"

#include <stdlib.h>

#include "cache_int.h"
#include "cache_filter.h"
#include "cache_objhead.h"
#include "cache_transport.h"

#include "vtim.h"
#include "storage/storage.h"

/*----------------------------------------------------------------------
 * Pull the req.body in via/into a objcore
 *
 * This can be called only once per request
 *
 */

static ssize_t
vrb_pull(struct req *req, ssize_t maxsize, objiterate_f *func, void *priv)
{
        ssize_t l, r = 0, yet;
        struct vrt_ctx ctx[1];
        struct vfp_ctx *vfc;
        uint8_t *ptr;
        enum vfp_status vfps = VFP_ERROR;
        const struct stevedore *stv;
        ssize_t req_bodybytes = 0;
        unsigned flush = OBJ_ITER_FLUSH;

        CHECK_OBJ_NOTNULL(req, REQ_MAGIC);

        CHECK_OBJ_NOTNULL(req->htc, HTTP_CONN_MAGIC);
        CHECK_OBJ_NOTNULL(req->vfc, VFP_CTX_MAGIC);
        vfc = req->vfc;

        req->body_oc = HSH_Private(req->wrk);
        AN(req->body_oc);

        if (req->storage != NULL)
                stv = req->storage;
        else
                stv = stv_transient;

        req->storage = NULL;

        if (STV_NewObject(req->wrk, req->body_oc, stv, 0) == 0) {
                req->req_body_status = BS_ERROR;
                HSH_DerefBoc(req->wrk, req->body_oc);
                AZ(HSH_DerefObjCore(req->wrk, &req->body_oc));
                (void)VFP_Error(vfc, "Object allocation failed:"
                    " Ran out of space in %s", stv->vclname);
                return (-1);
        }

        vfc->oc = req->body_oc;

        INIT_OBJ(ctx, VRT_CTX_MAGIC);
        VCL_Req2Ctx(ctx, req);

        if (req->vfp_filter_list != NULL &&
            VCL_StackVFP(vfc, req->vcl, req->vfp_filter_list)) {
                (void)VFP_Error(vfc, "req.body filters failed");
                req->req_body_status = BS_ERROR;
                HSH_DerefBoc(req->wrk, req->body_oc);
                AZ(HSH_DerefObjCore(req->wrk, &req->body_oc));
                return (-1);
        }


        if (VFP_Open(ctx, vfc) < 0) {
                req->req_body_status = BS_ERROR;
                HSH_DerefBoc(req->wrk, req->body_oc);
                AZ(HSH_DerefObjCore(req->wrk, &req->body_oc));
                return (-1);
        }

        AN(req->htc);
        yet = req->htc->content_length;
        if (yet != 0 && req->want100cont) {
                req->want100cont = 0;
                (void)req->transport->minimal_response(req, 100);
        }
        yet = vmax_t(ssize_t, yet, 0);
        do {
                AZ(vfc->failed);
                if (maxsize >= 0 && req_bodybytes > maxsize) {
                        (void)VFP_Error(vfc, "Request body too big to cache");
                        break;
                }
                /* NB: only attempt a full allocation when caching. */
                l = maxsize > 0 ? yet : 0;
                if (VFP_GetStorage(vfc, &l, &ptr) != VFP_OK)
                        break;
                AZ(vfc->failed);
                AN(ptr);
                AN(l);
                vfps = VFP_Suck(vfc, ptr, &l);
                if (l > 0 && vfps != VFP_ERROR) {
                        req_bodybytes += l;
                        if (yet >= l)
                                yet -= l;
                        else if (yet > 0)
                                yet = 0;
                        if (func != NULL) {
                                if (vfps == VFP_END)
                                        flush |= OBJ_ITER_END;
                                r = func(priv, flush, ptr, l);
                                // ending delivery early is not an error,
                                // continue sucking
                                if (r > 0)
                                        func = NULL;
                                else if (r)
                                        break;
                        } else {
                                ObjExtend(req->wrk, req->body_oc, l,
                                    vfps == VFP_END ? 1 : 0);
                        }
                }

        } while (vfps == VFP_OK);
        req->acct.req_bodybytes += VFP_Close(vfc);
        VSLb_ts_req(req, "ReqBody", VTIM_real());
        if (func != NULL || r > 0) {
                HSH_DerefBoc(req->wrk, req->body_oc);
                AZ(HSH_DerefObjCore(req->wrk, &req->body_oc));
                if (r > 0)
                        return (r);
                AN(func);
                if (vfps == VFP_END && r == 0 && (flush & OBJ_ITER_END) == 0)
                        r = func(priv, flush | OBJ_ITER_END, NULL, 0);
                if (vfps != VFP_END) {
                        req->req_body_status = BS_ERROR;
                        if (r == 0)
                                r = -1;
                }
                return (r);
        }

        AZ(ObjSetU64(req->wrk, req->body_oc, OA_LEN, req_bodybytes));
        HSH_DerefBoc(req->wrk, req->body_oc);

        if (vfps != VFP_END) {
                req->req_body_status = BS_ERROR;
                AZ(HSH_DerefObjCore(req->wrk, &req->body_oc));
                return (-1);
        }

        assert(req_bodybytes >= 0);
        if (req_bodybytes != req->htc->content_length) {
                /* We must update also the "pristine" req.* copy */
                http_Unset(req->http0, H_Content_Length);
                http_Unset(req->http0, H_Transfer_Encoding);
                http_PrintfHeader(req->http0, "Content-Length: %ju",
                    (uintmax_t)req_bodybytes);

                http_Unset(req->http, H_Content_Length);
                http_Unset(req->http, H_Transfer_Encoding);
                http_PrintfHeader(req->http, "Content-Length: %ju",
                    (uintmax_t)req_bodybytes);
        }

        req->req_body_status = BS_CACHED;
        return (req_bodybytes);
}

/*----------------------------------------------------------------------
 * Iterate over the req.body.
 *
 * This can be done exactly once if uncached, and multiple times if the
 * req.body is cached.
 *
 * return length or -1 on error
 */

ssize_t
VRB_Iterate(struct worker *wrk, struct vsl_log *vsl,
    struct req *req, objiterate_f *func, void *priv)
{
        int i;

        CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
        AN(func);

        if (req->req_body_status == BS_CACHED) {
                AN(req->body_oc);
                if (ObjIterate(wrk, req->body_oc, priv, func, 0))
                        return (-1);
                return (0);
        }
        if (req->req_body_status == BS_NONE)
                return (0);
        if (req->req_body_status == BS_TAKEN) {
                VSLb(vsl, SLT_VCL_Error,
                    "Uncached req.body can only be consumed once.");
                return (-1);
        }
        if (req->req_body_status == BS_ERROR) {
                VSLb(vsl, SLT_FetchError,
                    "Had failed reading req.body before.");
                return (-1);
        }
        Lck_Lock(&req->sp->mtx);
        if (req->req_body_status->avail > 0) {
                req->req_body_status = BS_TAKEN;
                i = 0;
        } else
                i = -1;
        Lck_Unlock(&req->sp->mtx);
        if (i) {
                VSLb(vsl, SLT_VCL_Error,
                    "Multiple attempts to access non-cached req.body");
                return (i);
        }
        return (vrb_pull(req, -1, func, priv));
}

/*----------------------------------------------------------------------
 * VRB_Ignore() is a dedicated function, because we might
 * be able to dissuade or terminate its transmission in some protocols.
 *
 * For HTTP1, we do nothing if we are going to close the connection anyway or
 * just iterate it into oblivion.
 */

static int v_matchproto_(objiterate_f)
httpq_req_body_discard(void *priv, unsigned flush, const void *ptr, ssize_t len)
{

        (void)priv;
        (void)flush;
        (void)ptr;
        (void)len;
        return (0);
}

int
VRB_Ignore(struct req *req)
{

        CHECK_OBJ_NOTNULL(req, REQ_MAGIC);

        if (req->doclose != SC_NULL)
                return (0);
        if (req->req_body_status->avail > 0)
                (void)VRB_Iterate(req->wrk, req->vsl, req,
                    httpq_req_body_discard, NULL);
        if (req->req_body_status == BS_ERROR)
                req->doclose = SC_RX_BODY;
        return (0);
}

/*----------------------------------------------------------------------
 */

void
VRB_Free(struct req *req)
{
        int r;

        CHECK_OBJ_NOTNULL(req, REQ_MAGIC);

        if (req->body_oc == NULL)
                return;

        r = HSH_DerefObjCore(req->wrk, &req->body_oc);

        // each busyobj may have gained a reference
        assert (r >= 0);
        assert ((unsigned)r <= req->restarts + 1);
}

/*----------------------------------------------------------------------
 * Cache the req.body if it is smaller than the given size
 *
 * This function must be called before any backend fetches are kicked
 * off to prevent parallelism.
 */

ssize_t
VRB_Cache(struct req *req, ssize_t maxsize)
{
        uint64_t u;

        CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
        assert (req->req_step == R_STP_RECV);
        assert(maxsize >= 0);

        /*
         * We only allow caching to happen the first time through vcl_recv{}
         * where we know we will have no competition or conflicts for the
         * updates to req.http.* etc.
         */
        if (req->restarts > 0 && req->req_body_status != BS_CACHED) {
                VSLb(req->vsl, SLT_VCL_Error,
                    "req.body must be cached before restarts");
                return (-1);
        }

        if (req->req_body_status == BS_CACHED) {
                AZ(ObjGetU64(req->wrk, req->body_oc, OA_LEN, &u));
                return (u);
        }

        if (req->req_body_status->avail <= 0)
                return (req->req_body_status->avail);

        if (req->htc->content_length > maxsize) {
                req->req_body_status = BS_ERROR;
                (void)VFP_Error(req->vfc, "Request body too big to cache");
                return (-1);
        }

        return (vrb_pull(req, maxsize, NULL, NULL));
}

		vinyl-cache/bin/vinyld/cache/cache_req_body.c
0		/*-
1		* Copyright (c) 2006 Verdens Gang AS
2		* Copyright (c) 2006-2015 Varnish Software AS
3		* All rights reserved.
4		*
5		* Author: Poul-Henning Kamp <phk@phk.freebsd.dk>
6		*
7		* SPDX-License-Identifier: BSD-2-Clause
8		*
9		* Redistribution and use in source and binary forms, with or without
10		* modification, are permitted provided that the following conditions
11		* are met:
12		* 1. Redistributions of source code must retain the above copyright
13		* notice, this list of conditions and the following disclaimer.
14		* 2. Redistributions in binary form must reproduce the above copyright
15		* notice, this list of conditions and the following disclaimer in the
16		* documentation and/or other materials provided with the distribution.
17		*
18		* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19		* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20		* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21		* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
22		* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23		* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24		* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25		* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26		* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27		* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28		* SUCH DAMAGE.
29		*
30		*/
31
32		#include "config.h"
33
34		#include <stdlib.h>
35
36		#include "cache_int.h"
37		#include "cache_filter.h"
38		#include "cache_objhead.h"
39		#include "cache_transport.h"
40
41		#include "vtim.h"
42		#include "storage/storage.h"
43
44		/*----------------------------------------------------------------------
45		* Pull the req.body in via/into a objcore
46		*
47		* This can be called only once per request
48		*
49		*/
50
51		static ssize_t
52	504	vrb_pull(struct req req, ssize_t maxsize, objiterate_f func, void *priv)
53		{
54	504	ssize_t l, r = 0, yet;
55		struct vrt_ctx ctx[1];
56		struct vfp_ctx *vfc;
57		uint8_t *ptr;
58	504	enum vfp_status vfps = VFP_ERROR;
59		const struct stevedore *stv;
60	504	ssize_t req_bodybytes = 0;
61	504	unsigned flush = OBJ_ITER_FLUSH;
62
63	504	CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
64
65	504	CHECK_OBJ_NOTNULL(req->htc, HTTP_CONN_MAGIC);
66	504	CHECK_OBJ_NOTNULL(req->vfc, VFP_CTX_MAGIC);
67	504	vfc = req->vfc;
68
69	504	req->body_oc = HSH_Private(req->wrk);
70	504	AN(req->body_oc);
71
72	504	if (req->storage != NULL)
73	24	stv = req->storage;
74		else
75	480	stv = stv_transient;
76
77	504	req->storage = NULL;
78
79	504	if (STV_NewObject(req->wrk, req->body_oc, stv, 0) == 0) {
80	8	req->req_body_status = BS_ERROR;
81	8	HSH_DerefBoc(req->wrk, req->body_oc);
82	8	AZ(HSH_DerefObjCore(req->wrk, &req->body_oc));
83	16	(void)VFP_Error(vfc, "Object allocation failed:"
84	8	" Ran out of space in %s", stv->vclname);
85	8	return (-1);
86		}
87
88	496	vfc->oc = req->body_oc;
89
90	496	INIT_OBJ(ctx, VRT_CTX_MAGIC);
91	496	VCL_Req2Ctx(ctx, req);
92
93	496	if (req->vfp_filter_list != NULL &&
94	32	VCL_StackVFP(vfc, req->vcl, req->vfp_filter_list)) {
95	0	(void)VFP_Error(vfc, "req.body filters failed");
96	0	req->req_body_status = BS_ERROR;
97	0	HSH_DerefBoc(req->wrk, req->body_oc);
98	0	AZ(HSH_DerefObjCore(req->wrk, &req->body_oc));
99	0	return (-1);
100		}
101
102
103	496	if (VFP_Open(ctx, vfc) < 0) {
104	0	req->req_body_status = BS_ERROR;
105	0	HSH_DerefBoc(req->wrk, req->body_oc);
106	0	AZ(HSH_DerefObjCore(req->wrk, &req->body_oc));
107	0	return (-1);
108		}
109
110	496	AN(req->htc);
111	496	yet = req->htc->content_length;
112	496	if (yet != 0 && req->want100cont) {
113	12	req->want100cont = 0;
114	12	(void)req->transport->minimal_response(req, 100);
115	12	}
116	496	yet = vmax_t(ssize_t, yet, 0);
117	496	do {
118	892	AZ(vfc->failed);
119	892	if (maxsize >= 0 && req_bodybytes > maxsize) {
120	4	(void)VFP_Error(vfc, "Request body too big to cache");
121	4	break;
122		}
123		/* NB: only attempt a full allocation when caching. */
124	888	l = maxsize > 0 ? yet : 0;
125	888	if (VFP_GetStorage(vfc, &l, &ptr) != VFP_OK)
126	0	break;
127	888	AZ(vfc->failed);
128	888	AN(ptr);
129	888	AN(l);
130	888	vfps = VFP_Suck(vfc, ptr, &l);
131	888	if (l > 0 && vfps != VFP_ERROR) {
132	755	req_bodybytes += l;
133	755	if (yet >= l)
134	459	yet -= l;
135	296	else if (yet > 0)
136	0	yet = 0;
137	755	if (func != NULL) {
138	512	if (vfps == VFP_END)
139	257	flush \|= OBJ_ITER_END;
140	512	r = func(priv, flush, ptr, l);
141		// ending delivery early is not an error,
142		// continue sucking
143	512	if (r > 0)
144	12	func = NULL;
145	500	else if (r)
146	0	break;
147	512	} else {
148	486	ObjExtend(req->wrk, req->body_oc, l,
149	243	vfps == VFP_END ? 1 : 0);
150		}
151	755	}
152
153	888	} while (vfps == VFP_OK);
154	496	req->acct.req_bodybytes += VFP_Close(vfc);
155	496	VSLb_ts_req(req, "ReqBody", VTIM_real());
156	496	if (func != NULL \|\| r > 0) {
157	364	HSH_DerefBoc(req->wrk, req->body_oc);
158	364	AZ(HSH_DerefObjCore(req->wrk, &req->body_oc));
159	364	if (r > 0)
160	12	return (r);
161	352	AN(func);
162	352	if (vfps == VFP_END && r == 0 && (flush & OBJ_ITER_END) == 0)
163	16	r = func(priv, flush \| OBJ_ITER_END, NULL, 0);
164	352	if (vfps != VFP_END) {
165	80	req->req_body_status = BS_ERROR;
166	80	if (r == 0)
167	80	r = -1;
168	80	}
169	352	return (r);
170		}
171
172	132	AZ(ObjSetU64(req->wrk, req->body_oc, OA_LEN, req_bodybytes));
173	132	HSH_DerefBoc(req->wrk, req->body_oc);
174
175	132	if (vfps != VFP_END) {
176	12	req->req_body_status = BS_ERROR;
177	12	AZ(HSH_DerefObjCore(req->wrk, &req->body_oc));
178	12	return (-1);
179		}
180
181	120	assert(req_bodybytes >= 0);
182	120	if (req_bodybytes != req->htc->content_length) {
183		/* We must update also the "pristine" req.* copy */
184	32	http_Unset(req->http0, H_Content_Length);
185	32	http_Unset(req->http0, H_Transfer_Encoding);
186	64	http_PrintfHeader(req->http0, "Content-Length: %ju",
187	32	(uintmax_t)req_bodybytes);
188
189	32	http_Unset(req->http, H_Content_Length);
190	32	http_Unset(req->http, H_Transfer_Encoding);
191	64	http_PrintfHeader(req->http, "Content-Length: %ju",
192	32	(uintmax_t)req_bodybytes);
193	32	}
194
195	120	req->req_body_status = BS_CACHED;
196	120	return (req_bodybytes);
197	504	}
198
199		/*----------------------------------------------------------------------
200		* Iterate over the req.body.
201		*
202		* This can be done exactly once if uncached, and multiple times if the
203		* req.body is cached.
204		*
205		* return length or -1 on error
206		*/
207
208		ssize_t
209	488	VRB_Iterate(struct worker wrk, struct vsl_log vsl,
210		struct req req, objiterate_f func, void *priv)
211		{
212		int i;
213
214	488	CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
215	488	AN(func);
216
217	488	if (req->req_body_status == BS_CACHED) {
218	124	AN(req->body_oc);
219	124	if (ObjIterate(wrk, req->body_oc, priv, func, 0))
220	0	return (-1);
221	124	return (0);
222		}
223	364	if (req->req_body_status == BS_NONE)
224	0	return (0);
225	364	if (req->req_body_status == BS_TAKEN) {
226	0	VSLb(vsl, SLT_VCL_Error,
227		"Uncached req.body can only be consumed once.");
228	0	return (-1);
229		}
230	364	if (req->req_body_status == BS_ERROR) {
231	0	VSLb(vsl, SLT_FetchError,
232		"Had failed reading req.body before.");
233	0	return (-1);
234		}
235	364	Lck_Lock(&req->sp->mtx);
236	364	if (req->req_body_status->avail > 0) {
237	364	req->req_body_status = BS_TAKEN;
238	364	i = 0;
239	364	} else
240	0	i = -1;
241	364	Lck_Unlock(&req->sp->mtx);
242	364	if (i) {
243	0	VSLb(vsl, SLT_VCL_Error,
244		"Multiple attempts to access non-cached req.body");
245	0	return (i);
246		}
247	364	return (vrb_pull(req, -1, func, priv));
248	488	}
249
250		/*----------------------------------------------------------------------
251		* VRB_Ignore() is a dedicated function, because we might
252		* be able to dissuade or terminate its transmission in some protocols.
253		*
254		* For HTTP1, we do nothing if we are going to close the connection anyway or
255		* just iterate it into oblivion.
256		*/
257
258		static int v_matchproto_(objiterate_f)
259	312	httpq_req_body_discard(void priv, unsigned flush, const void ptr, ssize_t len)
260		{
261
262	312	(void)priv;
263	312	(void)flush;
264	312	(void)ptr;
265	312	(void)len;
266	312	return (0);
267		}
268
269		int
270	15953	VRB_Ignore(struct req *req)
271		{
272
273	15953	CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
274
275	15953	if (req->doclose != SC_NULL)
276	1036	return (0);
277	14917	if (req->req_body_status->avail > 0)
278	224	(void)VRB_Iterate(req->wrk, req->vsl, req,
279		httpq_req_body_discard, NULL);
280	14917	if (req->req_body_status == BS_ERROR)
281	20	req->doclose = SC_RX_BODY;
282	14917	return (0);
283	15953	}
284
285		/*----------------------------------------------------------------------
286		*/
287
288		void
289	15457	VRB_Free(struct req *req)
290		{
291		int r;
292
293	15457	CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
294
295	15457	if (req->body_oc == NULL)
296	15337	return;
297
298	120	r = HSH_DerefObjCore(req->wrk, &req->body_oc);
299
300		// each busyobj may have gained a reference
301	120	assert (r >= 0);
302	120	assert ((unsigned)r <= req->restarts + 1);
303	15457	}
304
305		/*----------------------------------------------------------------------
306		* Cache the req.body if it is smaller than the given size
307		*
308		* This function must be called before any backend fetches are kicked
309		* off to prevent parallelism.
310		*/
311
312		ssize_t
313	168	VRB_Cache(struct req *req, ssize_t maxsize)
314		{
315		uint64_t u;
316
317	168	CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
318	168	assert (req->req_step == R_STP_RECV);
319	168	assert(maxsize >= 0);
320
321		/*
322		* We only allow caching to happen the first time through vcl_recv{}
323		* where we know we will have no competition or conflicts for the
324		* updates to req.http.* etc.
325		*/
326	168	if (req->restarts > 0 && req->req_body_status != BS_CACHED) {
327	0	VSLb(req->vsl, SLT_VCL_Error,
328		"req.body must be cached before restarts");
329	0	return (-1);
330		}
331
332	168	if (req->req_body_status == BS_CACHED) {
333	12	AZ(ObjGetU64(req->wrk, req->body_oc, OA_LEN, &u));
334	12	return (u);
335		}
336
337	156	if (req->req_body_status->avail <= 0)
338	12	return (req->req_body_status->avail);
339
340	144	if (req->htc->content_length > maxsize) {
341	4	req->req_body_status = BS_ERROR;
342	4	(void)VFP_Error(req->vfc, "Request body too big to cache");
343	4	return (-1);
344		}
345
346	140	return (vrb_pull(req, maxsize, NULL, NULL));
347	168	}