| | varnish-cache/bin/varnishd/cache/cache_fetch.c |
|---|
| 0 |
|
/*- |
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* Copyright (c) 2006 Verdens Gang AS |
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* Copyright (c) 2006-2015 Varnish Software AS |
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* All rights reserved. |
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* |
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* Author: Poul-Henning Kamp <phk@phk.freebsd.dk> |
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* |
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* SPDX-License-Identifier: BSD-2-Clause |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
| 15 |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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*/ |
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|
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#include "config.h" |
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|
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#include "cache_varnishd.h" |
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#include "cache_filter.h" |
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#include "cache_objhead.h" |
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#include "storage/storage.h" |
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#include "vcl.h" |
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#include "vtim.h" |
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#include "vcc_interface.h" |
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|
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#define FETCH_STEPS \ |
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FETCH_STEP(mkbereq, MKBEREQ) \ |
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FETCH_STEP(retry, RETRY) \ |
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FETCH_STEP(startfetch, STARTFETCH) \ |
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FETCH_STEP(condfetch, CONDFETCH) \ |
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FETCH_STEP(fetch, FETCH) \ |
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FETCH_STEP(fetchbody, FETCHBODY) \ |
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FETCH_STEP(fetchend, FETCHEND) \ |
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FETCH_STEP(error, ERROR) \ |
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FETCH_STEP(fail, FAIL) \ |
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FETCH_STEP(done, DONE) |
| 52 |
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|
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typedef const struct fetch_step *vbf_state_f(struct worker *, struct busyobj *); |
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|
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struct fetch_step { |
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const char *name; |
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vbf_state_f *func; |
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24282 |
}; |
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24282 |
|
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24282 |
#define FETCH_STEP(l, U) \ |
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24282 |
static vbf_state_f vbf_stp_##l; \ |
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static const struct fetch_step F_STP_##U[1] = {{ .name = "Fetch Step " #l, .func = vbf_stp_##l, }}; |
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FETCH_STEPS |
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#undef FETCH_STEP |
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|
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static hdr_t const H_X_Varnish = HDR("X-Varnish"); |
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|
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/*-------------------------------------------------------------------- |
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* Allocate an object, with fall-back to Transient. |
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* XXX: This somewhat overlaps the stuff in stevedore.c |
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* XXX: Should this be merged over there ? |
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*/ |
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|
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static int |
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29497 |
vbf_allocobj(struct busyobj *bo, unsigned l) |
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{ |
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struct objcore *oc; |
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const struct stevedore *stv; |
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vtim_dur lifetime; |
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|
| 81 |
29497 |
CHECK_OBJ_NOTNULL(bo, BUSYOBJ_MAGIC); |
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29497 |
oc = bo->fetch_objcore; |
| 83 |
29497 |
CHECK_OBJ_NOTNULL(oc, OBJCORE_MAGIC); |
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|
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29497 |
lifetime = oc->ttl + oc->grace + oc->keep; |
| 86 |
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|
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29497 |
if (bo->uncacheable) { |
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11674 |
stv = stv_transient; |
| 89 |
11674 |
bo->wrk->stats->beresp_uncacheable++; |
| 90 |
11674 |
} |
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17823 |
else if (lifetime < cache_param->shortlived) { |
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1651 |
stv = stv_transient; |
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1651 |
bo->wrk->stats->beresp_shortlived++; |
| 94 |
1651 |
} |
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else |
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16172 |
stv = bo->storage; |
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|
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29497 |
bo->storage = NULL; |
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|
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29497 |
if (stv == NULL) |
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13 |
return (0); |
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|
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29484 |
if (STV_NewObject(bo->wrk, oc, stv, l)) |
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29393 |
return (1); |
| 105 |
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|
| 106 |
91 |
if (stv == stv_transient) |
| 107 |
52 |
return (0); |
| 108 |
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|
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/* |
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* Try to salvage the transaction by allocating a shortlived object |
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* on Transient storage. |
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*/ |
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|
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39 |
oc->ttl = vmin_t(float, oc->ttl, cache_param->shortlived); |
| 115 |
39 |
oc->grace = 0.0; |
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39 |
oc->keep = 0.0; |
| 117 |
39 |
return (STV_NewObject(bo->wrk, oc, stv_transient, l)); |
| 118 |
29497 |
} |
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|
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static void |
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26546 |
vbf_cleanup(struct busyobj *bo) |
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{ |
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struct vfp_ctx *vfc; |
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|
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26546 |
CHECK_OBJ_NOTNULL(bo, BUSYOBJ_MAGIC); |
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26546 |
vfc = bo->vfc; |
| 127 |
26546 |
CHECK_OBJ_NOTNULL(vfc, VFP_CTX_MAGIC); |
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|
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26546 |
bo->acct.beresp_bodybytes += VFP_Close(vfc); |
| 130 |
26546 |
bo->vfp_filter_list = NULL; |
| 131 |
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|
| 132 |
26546 |
if (bo->director_state != DIR_S_NULL) |
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26439 |
VDI_Finish(bo); |
| 134 |
26546 |
} |
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|
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void |
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117 |
Bereq_Rollback(VRT_CTX) |
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{ |
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struct busyobj *bo; |
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|
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117 |
CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC); |
| 142 |
117 |
bo = ctx->bo; |
| 143 |
117 |
CHECK_OBJ_NOTNULL(bo, BUSYOBJ_MAGIC); |
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|
| 145 |
117 |
if (bo->htc != NULL) { |
| 146 |
104 |
assert(bo->htc->body_status != BS_TAKEN); |
| 147 |
104 |
if (bo->htc->body_status != BS_NONE) |
| 148 |
13 |
bo->htc->doclose = SC_RESP_CLOSE; |
| 149 |
104 |
} |
| 150 |
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|
| 151 |
117 |
vbf_cleanup(bo); |
| 152 |
117 |
VCL_TaskLeave(ctx, bo->privs); |
| 153 |
117 |
VCL_TaskEnter(bo->privs); |
| 154 |
117 |
HTTP_Clone(bo->bereq, bo->bereq0); |
| 155 |
117 |
bo->vfp_filter_list = NULL; |
| 156 |
117 |
bo->err_reason = NULL; |
| 157 |
117 |
AN(bo->ws_bo); |
| 158 |
117 |
WS_Rollback(bo->ws, bo->ws_bo); |
| 159 |
117 |
} |
| 160 |
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|
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/*-------------------------------------------------------------------- |
| 162 |
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* Turn the beresp into a obj |
| 163 |
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*/ |
| 164 |
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|
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static int |
| 166 |
29493 |
vbf_beresp2obj(struct busyobj *bo) |
| 167 |
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{ |
| 168 |
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unsigned l, l2; |
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const char *b; |
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uint8_t *bp; |
| 171 |
29493 |
struct vsb *vary = NULL; |
| 172 |
29493 |
int varyl = 0; |
| 173 |
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struct objcore *oc; |
| 174 |
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|
| 175 |
29493 |
CHECK_OBJ_NOTNULL(bo, BUSYOBJ_MAGIC); |
| 176 |
29493 |
oc = bo->fetch_objcore; |
| 177 |
29493 |
CHECK_OBJ_NOTNULL(oc, OBJCORE_MAGIC); |
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|
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29493 |
l = 0; |
| 180 |
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|
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/* Create Vary instructions */ |
| 182 |
29493 |
if (!(oc->flags & OC_F_PRIVATE)) { |
| 183 |
19149 |
varyl = VRY_Create(bo, &vary); |
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19149 |
if (varyl > 0) { |
| 185 |
2795 |
AN(vary); |
| 186 |
2795 |
assert(varyl == VSB_len(vary)); |
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2795 |
l += PRNDUP((intptr_t)varyl); |
| 188 |
19149 |
} else if (varyl < 0) { |
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/* |
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* Vary parse error |
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* Complain about it, and make this a pass. |
| 192 |
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*/ |
| 193 |
65 |
VSLb(bo->vsl, SLT_Error, |
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"Illegal 'Vary' header from backend, " |
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"making this a pass."); |
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65 |
bo->uncacheable = 1; |
| 197 |
65 |
AZ(vary); |
| 198 |
65 |
} else |
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/* No vary */ |
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16289 |
AZ(vary); |
| 201 |
19149 |
} |
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|
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58986 |
l2 = http_EstimateWS(bo->beresp, |
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29493 |
bo->uncacheable ? HTTPH_A_PASS : HTTPH_A_INS); |
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29493 |
l += l2; |
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|
| 207 |
29493 |
if (bo->uncacheable) |
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11670 |
oc->flags |= OC_F_HFM; |
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|
| 210 |
29493 |
if (!vbf_allocobj(bo, l)) { |
| 211 |
78 |
if (vary != NULL) |
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0 |
VSB_destroy(&vary); |
| 213 |
78 |
AZ(vary); |
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78 |
return (VFP_Error(bo->vfc, "Could not get storage")); |
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} |
| 216 |
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|
| 217 |
29415 |
if (vary != NULL) { |
| 218 |
2795 |
AN(ObjSetAttr(bo->wrk, oc, OA_VARY, varyl, VSB_data(vary))); |
| 219 |
2795 |
VSB_destroy(&vary); |
| 220 |
2795 |
} |
| 221 |
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|
| 222 |
29415 |
AZ(ObjSetXID(bo->wrk, oc, bo->vsl->wid)); |
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|
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/* for HTTP_Encode() VSLH call */ |
| 225 |
29415 |
bo->beresp->logtag = SLT_ObjMethod; |
| 226 |
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|
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/* Filter into object */ |
| 228 |
29415 |
bp = ObjSetAttr(bo->wrk, oc, OA_HEADERS, l2, NULL); |
| 229 |
29415 |
AN(bp); |
| 230 |
58830 |
HTTP_Encode(bo->beresp, bp, l2, |
| 231 |
29415 |
bo->uncacheable ? HTTPH_A_PASS : HTTPH_A_INS); |
| 232 |
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|
| 233 |
29415 |
if (http_GetHdr(bo->beresp, H_Last_Modified, &b)) |
| 234 |
559 |
AZ(ObjSetDouble(bo->wrk, oc, OA_LASTMODIFIED, VTIM_parse(b))); |
| 235 |
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else |
| 236 |
28856 |
AZ(ObjSetDouble(bo->wrk, oc, OA_LASTMODIFIED, |
| 237 |
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floor(oc->t_origin))); |
| 238 |
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|
| 239 |
29415 |
return (0); |
| 240 |
29493 |
} |
| 241 |
|
|
| 242 |
|
/*-------------------------------------------------------------------- |
| 243 |
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* Copy req->bereq and release req if no body |
| 244 |
|
*/ |
| 245 |
|
|
| 246 |
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static const struct fetch_step * v_matchproto_(vbf_state_f) |
| 247 |
29794 |
vbf_stp_mkbereq(struct worker *wrk, struct busyobj *bo) |
| 248 |
|
{ |
| 249 |
|
const char *q; |
| 250 |
|
struct objcore *oc; |
| 251 |
|
|
| 252 |
29794 |
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC); |
| 253 |
29794 |
CHECK_OBJ_NOTNULL(bo, BUSYOBJ_MAGIC); |
| 254 |
29794 |
CHECK_OBJ_NOTNULL(bo->req, REQ_MAGIC); |
| 255 |
29794 |
oc = bo->fetch_objcore; |
| 256 |
29794 |
CHECK_OBJ_NOTNULL(oc, OBJCORE_MAGIC); |
| 257 |
|
|
| 258 |
29794 |
assert(oc->boc->state == BOS_INVALID); |
| 259 |
29794 |
AZ(bo->storage); |
| 260 |
|
|
| 261 |
29794 |
HTTP_Setup(bo->bereq0, bo->ws, bo->vsl, SLT_BereqMethod); |
| 262 |
59588 |
http_FilterReq(bo->bereq0, bo->req->http, |
| 263 |
29794 |
bo->uncacheable ? HTTPH_R_PASS : HTTPH_R_FETCH); |
| 264 |
|
|
| 265 |
29794 |
if (bo->uncacheable) |
| 266 |
10333 |
AZ(bo->stale_oc); |
| 267 |
|
else { |
| 268 |
19461 |
http_ForceField(bo->bereq0, HTTP_HDR_METHOD, "GET"); |
| 269 |
19461 |
if (cache_param->http_gzip_support) |
| 270 |
19396 |
http_ForceHeader(bo->bereq0, H_Accept_Encoding, "gzip"); |
| 271 |
|
} |
| 272 |
29794 |
http_ForceField(bo->bereq0, HTTP_HDR_PROTO, "HTTP/1.1"); |
| 273 |
|
|
| 274 |
30275 |
if (bo->stale_oc != NULL && !(bo->stale_oc->flags & OC_F_DYING) && |
| 275 |
2028 |
ObjCheckFlag(bo->wrk, bo->stale_oc, OF_IMSCAND) && |
| 276 |
533 |
(bo->stale_oc->boc != NULL || ObjGetLen(wrk, bo->stale_oc) != 0)) { |
| 277 |
507 |
AZ(bo->stale_oc->flags & (OC_F_HFM|OC_F_PRIVATE)); |
| 278 |
507 |
q = RFC2616_Strong_LM(NULL, wrk, bo->stale_oc); |
| 279 |
507 |
if (q != NULL) |
| 280 |
338 |
http_PrintfHeader(bo->bereq0, |
| 281 |
169 |
"If-Modified-Since: %s", q); |
| 282 |
507 |
q = HTTP_GetHdrPack(bo->wrk, bo->stale_oc, H_ETag); |
| 283 |
507 |
if (q != NULL) |
| 284 |
702 |
http_PrintfHeader(bo->bereq0, |
| 285 |
351 |
"If-None-Match: %s", q); |
| 286 |
507 |
} |
| 287 |
|
|
| 288 |
29794 |
http_CopyHome(bo->bereq0); |
| 289 |
29794 |
HTTP_Setup(bo->bereq, bo->ws, bo->vsl, SLT_BereqMethod); |
| 290 |
29794 |
bo->ws_bo = WS_Snapshot(bo->ws); |
| 291 |
29794 |
HTTP_Clone(bo->bereq, bo->bereq0); |
| 292 |
|
|
| 293 |
29794 |
if (bo->req->req_body_status->avail == 0) { |
| 294 |
28573 |
VBO_SetState(bo->wrk, bo, BOS_REQ_DONE); |
| 295 |
29794 |
} else if (bo->req->req_body_status == BS_CACHED) { |
| 296 |
299 |
AN(bo->req->body_oc); |
| 297 |
299 |
bo->bereq_body = bo->req->body_oc; |
| 298 |
299 |
HSH_Ref(bo->bereq_body); |
| 299 |
299 |
VBO_SetState(bo->wrk, bo, BOS_REQ_DONE); |
| 300 |
299 |
} |
| 301 |
29794 |
return (F_STP_STARTFETCH); |
| 302 |
|
} |
| 303 |
|
|
| 304 |
|
/*-------------------------------------------------------------------- |
| 305 |
|
* Start a new VSL transaction and try again |
| 306 |
|
* Prepare the busyobj and fetch processors |
| 307 |
|
*/ |
| 308 |
|
|
| 309 |
|
static const struct fetch_step * v_matchproto_(vbf_state_f) |
| 310 |
494 |
vbf_stp_retry(struct worker *wrk, struct busyobj *bo) |
| 311 |
|
{ |
| 312 |
494 |
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC); |
| 313 |
494 |
CHECK_OBJ_NOTNULL(bo, BUSYOBJ_MAGIC); |
| 314 |
|
|
| 315 |
494 |
assert(bo->fetch_objcore->boc->state <= BOS_REQ_DONE); |
| 316 |
|
|
| 317 |
494 |
if (bo->no_retry != NULL && bo->no_retry != retry_disabled) { |
| 318 |
52 |
VSLb(bo->vsl, SLT_Error, |
| 319 |
26 |
"Retry not possible, %s", bo->no_retry); |
| 320 |
26 |
return (F_STP_FAIL); |
| 321 |
|
} |
| 322 |
|
|
| 323 |
468 |
VSLb_ts_busyobj(bo, "Retry", W_TIM_real(wrk)); |
| 324 |
|
|
| 325 |
|
/* VDI_Finish (via vbf_cleanup) must have been called before */ |
| 326 |
468 |
assert(bo->director_state == DIR_S_NULL); |
| 327 |
|
|
| 328 |
|
/* reset other bo attributes - See VBO_GetBusyObj */ |
| 329 |
468 |
bo->storage = NULL; |
| 330 |
468 |
bo->do_esi = 0; |
| 331 |
468 |
bo->do_stream = 1; |
| 332 |
468 |
bo->was_304 = 0; |
| 333 |
468 |
bo->err_code = 0; |
| 334 |
468 |
bo->err_reason = NULL; |
| 335 |
468 |
bo->connect_timeout = NAN; |
| 336 |
468 |
bo->first_byte_timeout = NAN; |
| 337 |
468 |
bo->between_bytes_timeout = NAN; |
| 338 |
468 |
if (bo->htc != NULL) |
| 339 |
0 |
bo->htc->doclose = SC_NULL; |
| 340 |
|
|
| 341 |
|
// XXX: BereqEnd + BereqAcct ? |
| 342 |
468 |
VSL_ChgId(bo->vsl, "bereq", "retry", VXID_Get(wrk, VSL_BACKENDMARKER)); |
| 343 |
468 |
VSLb_ts_busyobj(bo, "Start", bo->t_prev); |
| 344 |
468 |
http_VSL_log(bo->bereq); |
| 345 |
|
|
| 346 |
468 |
return (F_STP_STARTFETCH); |
| 347 |
494 |
} |
| 348 |
|
|
| 349 |
|
/*-------------------------------------------------------------------- |
| 350 |
|
* 304 setup logic |
| 351 |
|
*/ |
| 352 |
|
|
| 353 |
|
static void |
| 354 |
403 |
vbf_304_logic(struct busyobj *bo) |
| 355 |
|
{ |
| 356 |
|
|
| 357 |
403 |
AZ(bo->stale_oc->flags & (OC_F_HFM|OC_F_PRIVATE)); |
| 358 |
403 |
if (ObjCheckFlag(bo->wrk, bo->stale_oc, OF_CHGCE)) { |
| 359 |
|
/* |
| 360 |
|
* If a VFP changed C-E in the stored |
| 361 |
|
* object, then don't overwrite C-E from |
| 362 |
|
* the IMS fetch, and we must weaken any |
| 363 |
|
* new ETag we get. |
| 364 |
|
*/ |
| 365 |
26 |
RFC2616_Weaken_Etag(bo->beresp); |
| 366 |
26 |
} |
| 367 |
403 |
http_Unset(bo->beresp, H_Content_Encoding); |
| 368 |
403 |
http_Unset(bo->beresp, H_Content_Length); |
| 369 |
403 |
HTTP_Merge(bo->wrk, bo->stale_oc, bo->beresp); |
| 370 |
403 |
} |
| 371 |
|
|
| 372 |
|
/*-------------------------------------------------------------------- |
| 373 |
|
* Setup bereq from bereq0, run vcl_backend_fetch |
| 374 |
|
*/ |
| 375 |
|
|
| 376 |
|
static const struct fetch_step * v_matchproto_(vbf_state_f) |
| 377 |
30262 |
vbf_stp_startfetch(struct worker *wrk, struct busyobj *bo) |
| 378 |
|
{ |
| 379 |
|
int i; |
| 380 |
|
const char *q; |
| 381 |
|
vtim_real now; |
| 382 |
30262 |
unsigned handling, skip_vbr = 0; |
| 383 |
|
struct objcore *oc; |
| 384 |
|
|
| 385 |
30262 |
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC); |
| 386 |
30262 |
CHECK_OBJ_NOTNULL(bo, BUSYOBJ_MAGIC); |
| 387 |
30262 |
oc = bo->fetch_objcore; |
| 388 |
30262 |
CHECK_OBJ_NOTNULL(oc, OBJCORE_MAGIC); |
| 389 |
|
|
| 390 |
|
// this complements the stale_oc handling in vbf_stp_mkbereq(): |
| 391 |
|
// Conditions might have changed since we made the bereq (retry) |
| 392 |
30262 |
if (! bo->uncacheable && bo->stale_oc != NULL && |
| 393 |
2067 |
bo->stale_oc->flags & OC_F_DYING) { |
| 394 |
26 |
http_Unset(bo->bereq, H_If_Modified_Since); |
| 395 |
26 |
http_Unset(bo->bereq, H_If_None_Match); |
| 396 |
26 |
} |
| 397 |
|
|
| 398 |
30262 |
AZ(bo->storage); |
| 399 |
30262 |
bo->storage = bo->uncacheable ? stv_transient : STV_next(); |
| 400 |
|
|
| 401 |
30262 |
if (bo->retries > 0) |
| 402 |
468 |
http_Unset(bo->bereq, H_X_Varnish); |
| 403 |
|
|
| 404 |
30262 |
http_PrintfHeader(bo->bereq, "X-Varnish: %ju", VXID(bo->vsl->wid)); |
| 405 |
|
|
| 406 |
30262 |
if (bo->bereq_body == NULL && bo->req == NULL) |
| 407 |
29042 |
http_Unset(bo->bereq, H_Content_Length); |
| 408 |
|
|
| 409 |
30262 |
VCL_backend_fetch_method(bo->vcl, wrk, NULL, bo, NULL); |
| 410 |
|
|
| 411 |
30262 |
if (wrk->vpi->handling == VCL_RET_ABANDON || |
| 412 |
30223 |
wrk->vpi->handling == VCL_RET_FAIL) |
| 413 |
90 |
return (F_STP_FAIL); |
| 414 |
|
|
| 415 |
30172 |
assert (wrk->vpi->handling == VCL_RET_FETCH || |
| 416 |
|
wrk->vpi->handling == VCL_RET_ERROR); |
| 417 |
|
|
| 418 |
30172 |
HTTP_Setup(bo->beresp, bo->ws, bo->vsl, SLT_BerespMethod); |
| 419 |
|
|
| 420 |
30172 |
assert(oc->boc->state <= BOS_REQ_DONE); |
| 421 |
|
|
| 422 |
30172 |
AZ(bo->htc); |
| 423 |
|
|
| 424 |
30172 |
VFP_Setup(bo->vfc, wrk); |
| 425 |
30172 |
bo->vfc->oc = oc; |
| 426 |
30172 |
bo->vfc->resp = bo->beresp; |
| 427 |
30172 |
bo->vfc->req = bo->bereq; |
| 428 |
|
|
| 429 |
30172 |
if (wrk->vpi->handling == VCL_RET_ERROR) |
| 430 |
130 |
return (F_STP_ERROR); |
| 431 |
|
|
| 432 |
30042 |
VSLb_ts_busyobj(bo, "Fetch", W_TIM_real(wrk)); |
| 433 |
30042 |
i = VDI_GetHdr(bo); |
| 434 |
30042 |
if (bo->htc != NULL) |
| 435 |
26530 |
CHECK_OBJ_NOTNULL(bo->htc->doclose, STREAM_CLOSE_MAGIC); |
| 436 |
|
|
| 437 |
30042 |
bo->t_resp = now = W_TIM_real(wrk); |
| 438 |
30042 |
VSLb_ts_busyobj(bo, "Beresp", now); |
| 439 |
|
|
| 440 |
30042 |
if (i) { |
| 441 |
3497 |
assert(bo->director_state == DIR_S_NULL); |
| 442 |
3497 |
return (F_STP_ERROR); |
| 443 |
|
} |
| 444 |
|
|
| 445 |
26545 |
if (bo->htc != NULL && bo->htc->body_status == BS_ERROR) { |
| 446 |
78 |
bo->htc->doclose = SC_RX_BODY; |
| 447 |
78 |
vbf_cleanup(bo); |
| 448 |
78 |
VSLb(bo->vsl, SLT_Error, "Body cannot be fetched"); |
| 449 |
78 |
assert(bo->director_state == DIR_S_NULL); |
| 450 |
78 |
return (F_STP_ERROR); |
| 451 |
|
} |
| 452 |
|
|
| 453 |
26467 |
if (!http_GetHdr(bo->beresp, H_Date, NULL)) { |
| 454 |
|
/* |
| 455 |
|
* RFC 2616 14.18 Date: The Date general-header field |
| 456 |
|
* represents the date and time at which the message was |
| 457 |
|
* originated, having the same semantics as orig-date in |
| 458 |
|
* RFC 822. ... A received message that does not have a |
| 459 |
|
* Date header field MUST be assigned one by the recipient |
| 460 |
|
* if the message will be cached by that recipient or |
| 461 |
|
* gatewayed via a protocol which requires a Date. |
| 462 |
|
* |
| 463 |
|
* If we didn't get a Date header, we assign one here. |
| 464 |
|
*/ |
| 465 |
1079 |
http_TimeHeader(bo->beresp, "Date: ", now); |
| 466 |
1079 |
} |
| 467 |
|
|
| 468 |
|
/* |
| 469 |
|
* These two headers can be spread over multiple actual headers |
| 470 |
|
* and we rely on their content outside of VCL, so collect them |
| 471 |
|
* into one line here. |
| 472 |
|
*/ |
| 473 |
26465 |
http_CollectHdr(bo->beresp, H_Cache_Control); |
| 474 |
26465 |
http_CollectHdr(bo->beresp, H_Vary); |
| 475 |
|
|
| 476 |
|
/* What does RFC2616 think about TTL ? */ |
| 477 |
52930 |
RFC2616_Ttl(bo, now, |
| 478 |
26465 |
&oc->t_origin, |
| 479 |
26465 |
&oc->ttl, |
| 480 |
26465 |
&oc->grace, |
| 481 |
26465 |
&oc->keep); |
| 482 |
|
|
| 483 |
26465 |
AZ(bo->do_esi); |
| 484 |
26465 |
AZ(bo->was_304); |
| 485 |
|
|
| 486 |
26465 |
if (http_IsStatus(bo->beresp, 304) && !bo->uncacheable) { |
| 487 |
520 |
if (bo->stale_oc == NULL){ |
| 488 |
0 |
VSLb(bo->vsl, SLT_Error, |
| 489 |
|
"304 response but not conditional fetch"); |
| 490 |
0 |
bo->htc->doclose = SC_RX_BAD; |
| 491 |
0 |
vbf_cleanup(bo); |
| 492 |
0 |
return (F_STP_ERROR); |
| 493 |
|
} |
| 494 |
520 |
bo->was_304 = 1; |
| 495 |
520 |
VCL_backend_refresh_method(bo->vcl, wrk, NULL, bo, NULL); |
| 496 |
520 |
switch (wrk->vpi->handling) { |
| 497 |
|
case VCL_RET_MERGE: |
| 498 |
403 |
vbf_304_logic(bo); |
| 499 |
403 |
break; |
| 500 |
|
case VCL_RET_BERESP: |
| 501 |
26 |
http_SetStatus(bo->beresp, 200, NULL); |
| 502 |
26 |
http_Unset(bo->beresp, H_Content_Length); |
| 503 |
26 |
http_Unset(bo->beresp, H_Content_Encoding); |
| 504 |
52 |
q = HTTP_GetHdrPack(wrk, bo->stale_oc, |
| 505 |
26 |
H_Content_Length); |
| 506 |
26 |
if (q != NULL) { |
| 507 |
26 |
http_ForceHeader(bo->beresp, |
| 508 |
13 |
H_Content_Length, q); |
| 509 |
13 |
} |
| 510 |
52 |
q = HTTP_GetHdrPack(wrk, bo->stale_oc, |
| 511 |
26 |
H_Content_Encoding); |
| 512 |
26 |
if (q != NULL) { |
| 513 |
0 |
http_ForceHeader(bo->beresp, |
| 514 |
0 |
H_Content_Encoding, q); |
| 515 |
0 |
} |
| 516 |
52 |
q = HTTP_GetHdrPack(wrk, bo->stale_oc, |
| 517 |
26 |
H_Last_Modified); |
| 518 |
26 |
if (q != NULL) { |
| 519 |
0 |
http_ForceHeader(bo->beresp, |
| 520 |
0 |
H_Last_Modified, q); |
| 521 |
0 |
} |
| 522 |
26 |
q = HTTP_GetHdrPack(wrk, bo->stale_oc, H_ETag); |
| 523 |
26 |
if (q != NULL) |
| 524 |
26 |
http_ForceHeader(bo->beresp, H_ETag, q); |
| 525 |
26 |
break; |
| 526 |
|
case VCL_RET_OBJ_STALE: |
| 527 |
26 |
if (HTTP_Decode(bo->beresp, ObjGetAttr(bo->wrk, |
| 528 |
13 |
bo->stale_oc, OA_HEADERS, NULL))) { |
| 529 |
0 |
bo->htc->doclose = SC_RX_OVERFLOW; |
| 530 |
0 |
vbf_cleanup(bo); |
| 531 |
0 |
return (F_STP_ERROR); |
| 532 |
|
} |
| 533 |
13 |
break; |
| 534 |
|
case VCL_RET_RETRY: |
| 535 |
|
case VCL_RET_ERROR: |
| 536 |
|
case VCL_RET_ABANDON: |
| 537 |
|
case VCL_RET_FAIL: |
| 538 |
78 |
skip_vbr = 1; |
| 539 |
78 |
break; |
| 540 |
|
default: |
| 541 |
0 |
WRONG("Illegal return from vcl_backend_refresh{}"); |
| 542 |
0 |
} |
| 543 |
520 |
} |
| 544 |
|
|
| 545 |
26465 |
if (bo->htc != NULL && bo->htc->doclose == SC_NULL && |
| 546 |
25268 |
http_GetHdrField(bo->bereq, H_Connection, "close", NULL)) |
| 547 |
169 |
bo->htc->doclose = SC_REQ_CLOSE; |
| 548 |
26465 |
if (!skip_vbr) |
| 549 |
26375 |
VCL_backend_response_method(bo->vcl, wrk, NULL, bo, NULL); |
| 550 |
|
|
| 551 |
26441 |
if (bo->htc != NULL && bo->htc->doclose == SC_NULL && |
| 552 |
24981 |
http_GetHdrField(bo->beresp, H_Connection, "close", NULL)) |
| 553 |
13 |
bo->htc->doclose = SC_RESP_CLOSE; |
| 554 |
|
|
| 555 |
26441 |
if (VRG_CheckBo(bo) < 0) { |
| 556 |
91 |
if (bo->director_state != DIR_S_NULL) |
| 557 |
78 |
VDI_Finish(bo); |
| 558 |
91 |
return (F_STP_ERROR); |
| 559 |
|
} |
| 560 |
|
|
| 561 |
52633 |
if (wrk->vpi->handling == VCL_RET_ABANDON || |
| 562 |
26309 |
wrk->vpi->handling == VCL_RET_FAIL || |
| 563 |
26283 |
wrk->vpi->handling == VCL_RET_ERROR) { |
| 564 |
|
/* do not count deliberately ending the backend connection as |
| 565 |
|
* fetch failure |
| 566 |
|
*/ |
| 567 |
195 |
handling = wrk->vpi->handling; |
| 568 |
195 |
if (bo->htc) |
| 569 |
195 |
bo->htc->doclose = SC_RESP_CLOSE; |
| 570 |
195 |
vbf_cleanup(bo); |
| 571 |
195 |
wrk->vpi->handling = handling; |
| 572 |
|
|
| 573 |
195 |
if (wrk->vpi->handling == VCL_RET_ERROR) |
| 574 |
130 |
return (F_STP_ERROR); |
| 575 |
|
else |
| 576 |
65 |
return (F_STP_FAIL); |
| 577 |
|
} |
| 578 |
|
|
| 579 |
26155 |
if (wrk->vpi->handling == VCL_RET_RETRY) { |
| 580 |
377 |
if (bo->htc && bo->htc->body_status != BS_NONE) |
| 581 |
91 |
bo->htc->doclose = SC_RESP_CLOSE; |
| 582 |
377 |
vbf_cleanup(bo); |
| 583 |
|
|
| 584 |
377 |
if (bo->retries++ < bo->max_retries) |
| 585 |
351 |
return (F_STP_RETRY); |
| 586 |
|
|
| 587 |
26 |
VSLb(bo->vsl, SLT_VCL_Error, |
| 588 |
|
"Too many retries, delivering 503"); |
| 589 |
26 |
assert(bo->director_state == DIR_S_NULL); |
| 590 |
26 |
return (F_STP_ERROR); |
| 591 |
|
} |
| 592 |
|
|
| 593 |
25778 |
VSLb_ts_busyobj(bo, "Process", W_TIM_real(wrk)); |
| 594 |
25778 |
assert(oc->boc->state <= BOS_REQ_DONE); |
| 595 |
25778 |
if (oc->boc->state != BOS_REQ_DONE) |
| 596 |
533 |
VBO_SetState(wrk, bo, BOS_REQ_DONE); |
| 597 |
|
|
| 598 |
25778 |
if (bo->do_esi) |
| 599 |
4030 |
bo->do_stream = 0; |
| 600 |
25778 |
if (wrk->vpi->handling == VCL_RET_PASS) { |
| 601 |
286 |
oc->flags |= OC_F_HFP; |
| 602 |
286 |
bo->uncacheable = 1; |
| 603 |
286 |
wrk->vpi->handling = VCL_RET_DELIVER; |
| 604 |
286 |
} |
| 605 |
25778 |
if (!bo->uncacheable || !bo->do_stream) |
| 606 |
17797 |
oc->boc->transit_buffer = 0; |
| 607 |
25778 |
if (bo->uncacheable) |
| 608 |
9775 |
oc->flags |= OC_F_HFM; |
| 609 |
|
|
| 610 |
25778 |
assert(wrk->vpi->handling == VCL_RET_DELIVER); |
| 611 |
|
|
| 612 |
25778 |
return (bo->was_304 ? F_STP_CONDFETCH : F_STP_FETCH); |
| 613 |
30236 |
} |
| 614 |
|
|
| 615 |
|
/*-------------------------------------------------------------------- |
| 616 |
|
*/ |
| 617 |
|
|
| 618 |
|
static const struct fetch_step * v_matchproto_(vbf_state_f) |
| 619 |
14476 |
vbf_stp_fetchbody(struct worker *wrk, struct busyobj *bo) |
| 620 |
|
{ |
| 621 |
|
ssize_t l; |
| 622 |
|
uint8_t *ptr; |
| 623 |
14476 |
enum vfp_status vfps = VFP_ERROR; |
| 624 |
|
ssize_t est; |
| 625 |
|
struct vfp_ctx *vfc; |
| 626 |
|
struct objcore *oc; |
| 627 |
|
|
| 628 |
14476 |
CHECK_OBJ_NOTNULL(bo, BUSYOBJ_MAGIC); |
| 629 |
14476 |
vfc = bo->vfc; |
| 630 |
14476 |
CHECK_OBJ_NOTNULL(vfc, VFP_CTX_MAGIC); |
| 631 |
14476 |
oc = bo->fetch_objcore; |
| 632 |
14476 |
CHECK_OBJ_NOTNULL(oc, OBJCORE_MAGIC); |
| 633 |
|
|
| 634 |
14476 |
AN(vfc->vfp_nxt); |
| 635 |
|
|
| 636 |
14476 |
est = bo->htc->content_length; |
| 637 |
14476 |
if (est < 0) |
| 638 |
1937 |
est = 0; |
| 639 |
|
|
| 640 |
14476 |
do { |
| 641 |
728081 |
if (oc->flags & OC_F_CANCEL) { |
| 642 |
|
/* |
| 643 |
|
* A pass object and delivery was terminated |
| 644 |
|
* We don't fail the fetch, in order for HitMiss |
| 645 |
|
* objects to be created. |
| 646 |
|
*/ |
| 647 |
36 |
AN(oc->flags & OC_F_HFM); |
| 648 |
36 |
VSLb(wrk->vsl, SLT_Debug, |
| 649 |
|
"Fetch: Pass delivery abandoned"); |
| 650 |
36 |
bo->htc->doclose = SC_RX_BODY; |
| 651 |
36 |
break; |
| 652 |
|
} |
| 653 |
728045 |
AZ(vfc->failed); |
| 654 |
728045 |
l = est; |
| 655 |
728045 |
assert(l >= 0); |
| 656 |
728045 |
if (VFP_GetStorage(vfc, &l, &ptr) != VFP_OK) { |
| 657 |
65 |
bo->htc->doclose = SC_RX_BODY; |
| 658 |
65 |
break; |
| 659 |
|
} |
| 660 |
|
|
| 661 |
727980 |
AZ(vfc->failed); |
| 662 |
727980 |
vfps = VFP_Suck(vfc, ptr, &l); |
| 663 |
727980 |
if (l >= 0 && vfps != VFP_ERROR) { |
| 664 |
727557 |
VFP_Extend(vfc, l, vfps); |
| 665 |
727557 |
if (est >= l) |
| 666 |
37148 |
est -= l; |
| 667 |
|
else |
| 668 |
690409 |
est = 0; |
| 669 |
727557 |
} |
| 670 |
727980 |
} while (vfps == VFP_OK); |
| 671 |
|
|
| 672 |
14468 |
if (vfc->failed) { |
| 673 |
481 |
(void)VFP_Error(vfc, "Fetch pipeline failed to process"); |
| 674 |
481 |
bo->htc->doclose = SC_RX_BODY; |
| 675 |
481 |
vbf_cleanup(bo); |
| 676 |
481 |
if (!bo->do_stream) { |
| 677 |
273 |
assert(oc->boc->state < BOS_STREAM); |
| 678 |
|
// XXX: doclose = ? |
| 679 |
273 |
return (F_STP_ERROR); |
| 680 |
|
} else { |
| 681 |
208 |
wrk->stats->fetch_failed++; |
| 682 |
208 |
return (F_STP_FAIL); |
| 683 |
|
} |
| 684 |
|
} |
| 685 |
|
|
| 686 |
13987 |
return (F_STP_FETCHEND); |
| 687 |
14468 |
} |
| 688 |
|
|
| 689 |
|
static const struct fetch_step * v_matchproto_(vbf_state_f) |
| 690 |
25347 |
vbf_stp_fetch(struct worker *wrk, struct busyobj *bo) |
| 691 |
|
{ |
| 692 |
|
struct vrt_ctx ctx[1]; |
| 693 |
|
struct objcore *oc; |
| 694 |
|
|
| 695 |
25347 |
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC); |
| 696 |
25347 |
CHECK_OBJ_NOTNULL(bo, BUSYOBJ_MAGIC); |
| 697 |
25347 |
oc = bo->fetch_objcore; |
| 698 |
25347 |
CHECK_OBJ_NOTNULL(oc, OBJCORE_MAGIC); |
| 699 |
|
|
| 700 |
25347 |
assert(wrk->vpi->handling == VCL_RET_DELIVER); |
| 701 |
|
|
| 702 |
25347 |
if (bo->htc == NULL) { |
| 703 |
26 |
(void)VFP_Error(bo->vfc, "No backend connection (rollback?)"); |
| 704 |
26 |
vbf_cleanup(bo); |
| 705 |
26 |
return (F_STP_ERROR); |
| 706 |
|
} |
| 707 |
|
|
| 708 |
|
/* No body -> done */ |
| 709 |
25321 |
if (bo->htc->body_status == BS_NONE || bo->htc->content_length == 0) { |
| 710 |
9841 |
http_Unset(bo->beresp, H_Content_Encoding); |
| 711 |
9841 |
bo->do_gzip = bo->do_gunzip = 0; |
| 712 |
9841 |
bo->do_stream = 0; |
| 713 |
9841 |
bo->vfp_filter_list = ""; |
| 714 |
25323 |
} else if (bo->vfp_filter_list == NULL) { |
| 715 |
15404 |
bo->vfp_filter_list = VBF_Get_Filter_List(bo); |
| 716 |
15404 |
} |
| 717 |
|
|
| 718 |
25323 |
if (bo->vfp_filter_list == NULL || |
| 719 |
25322 |
VCL_StackVFP(bo->vfc, bo->vcl, bo->vfp_filter_list)) { |
| 720 |
313 |
(bo)->htc->doclose = SC_OVERLOAD; |
| 721 |
313 |
vbf_cleanup(bo); |
| 722 |
313 |
return (F_STP_ERROR); |
| 723 |
|
} |
| 724 |
|
|
| 725 |
25010 |
if (oc->flags & OC_F_PRIVATE) |
| 726 |
8252 |
AN(bo->uncacheable); |
| 727 |
|
|
| 728 |
25010 |
oc->boc->fetched_so_far = 0; |
| 729 |
|
|
| 730 |
25010 |
INIT_OBJ(ctx, VRT_CTX_MAGIC); |
| 731 |
25010 |
VCL_Bo2Ctx(ctx, bo); |
| 732 |
|
|
| 733 |
25010 |
if (VFP_Open(ctx, bo->vfc)) { |
| 734 |
689 |
(void)VFP_Error(bo->vfc, "Fetch pipeline failed to open"); |
| 735 |
689 |
bo->htc->doclose = SC_RX_BODY; |
| 736 |
689 |
vbf_cleanup(bo); |
| 737 |
689 |
return (F_STP_ERROR); |
| 738 |
|
} |
| 739 |
|
|
| 740 |
24321 |
if (vbf_beresp2obj(bo)) { |
| 741 |
39 |
bo->htc->doclose = SC_RX_BODY; |
| 742 |
39 |
vbf_cleanup(bo); |
| 743 |
39 |
return (F_STP_ERROR); |
| 744 |
|
} |
| 745 |
|
|
| 746 |
|
#define OBJ_FLAG(U, l, v) \ |
| 747 |
|
if (bo->vfc->obj_flags & OF_##U) \ |
| 748 |
|
ObjSetFlag(bo->wrk, oc, OF_##U, 1); |
| 749 |
|
#include "tbl/obj_attr.h" |
| 750 |
|
|
| 751 |
24282 |
if (!(oc->flags & OC_F_HFM) && |
| 752 |
15470 |
http_IsStatus(bo->beresp, 200) && ( |
| 753 |
15222 |
RFC2616_Strong_LM(bo->beresp, NULL, NULL) != NULL || |
| 754 |
14912 |
http_GetHdr(bo->beresp, H_ETag, NULL))) |
| 755 |
779 |
ObjSetFlag(bo->wrk, oc, OF_IMSCAND, 1); |
| 756 |
|
|
| 757 |
24282 |
assert(oc->boc->refcount >= 1); |
| 758 |
|
|
| 759 |
24282 |
assert(oc->boc->state == BOS_REQ_DONE); |
| 760 |
|
|
| 761 |
24282 |
if (bo->do_stream) |
| 762 |
10812 |
VBO_SetState(wrk, bo, BOS_STREAM); |
| 763 |
|
|
| 764 |
|
VSLb(bo->vsl, SLT_Fetch_Body, "%u %s %s", |
| 765 |
|
bo->htc->body_status->nbr, bo->htc->body_status->name, |
| 766 |
|
bo->do_stream ? "stream" : "-"); |
| 767 |
|
|
| 768 |
24282 |
if (bo->htc->body_status != BS_NONE) { |
| 769 |
14467 |
assert(bo->htc->body_status != BS_ERROR); |
| 770 |
14467 |
return (F_STP_FETCHBODY); |
| 771 |
|
} |
| 772 |
9815 |
AZ(bo->vfc->failed); |
| 773 |
|
return (F_STP_FETCHEND); |
| 774 |
|
} |
| 775 |
|
|
| 776 |
|
static const struct fetch_step * v_matchproto_(vbf_state_f) |
| 777 |
24179 |
vbf_stp_fetchend(struct worker *wrk, struct busyobj *bo) |
| 778 |
|
{ |
| 779 |
|
|
| 780 |
|
struct objcore *oc; |
| 781 |
|
|
| 782 |
24179 |
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC); |
| 783 |
24179 |
CHECK_OBJ_NOTNULL(bo, BUSYOBJ_MAGIC); |
| 784 |
24179 |
oc = bo->fetch_objcore; |
| 785 |
24179 |
CHECK_OBJ_NOTNULL(oc, OBJCORE_MAGIC); |
| 786 |
|
|
| 787 |
24179 |
AZ(bo->vfc->failed); |
| 788 |
|
|
| 789 |
|
/* Recycle the backend connection before setting BOS_FINISHED to |
| 790 |
|
give predictable backend reuse behavior for varnishtest */ |
| 791 |
24179 |
vbf_cleanup(bo); |
| 792 |
|
|
| 793 |
24179 |
AZ(ObjSetU64(wrk, oc, OA_LEN, oc->boc->fetched_so_far)); |
| 794 |
|
|
| 795 |
24179 |
if (bo->do_stream) |
| 796 |
10971 |
assert(oc->boc->state == BOS_STREAM); |
| 797 |
|
else |
| 798 |
13208 |
assert(oc->boc->state == BOS_REQ_DONE); |
| 799 |
|
|
| 800 |
24179 |
VBO_SetState(wrk, bo, BOS_FINISHED); |
| 801 |
24179 |
VSLb_ts_busyobj(bo, "BerespBody", W_TIM_real(wrk)); |
| 802 |
24179 |
if (bo->stale_oc != NULL) { |
| 803 |
2054 |
VSL(SLT_ExpKill, NO_VXID, "VBF_Superseded x=%ju n=%ju", |
| 804 |
1027 |
VXID(ObjGetXID(wrk, bo->stale_oc)), |
| 805 |
1027 |
VXID(ObjGetXID(wrk, bo->fetch_objcore))); |
| 806 |
1027 |
HSH_Replace(bo->stale_oc, bo->fetch_objcore); |
| 807 |
1027 |
} |
| 808 |
24179 |
return (F_STP_DONE); |
| 809 |
|
} |
| 810 |
|
|
| 811 |
|
/*-------------------------------------------------------------------- |
| 812 |
|
*/ |
| 813 |
|
|
| 814 |
|
struct vbf_objiter_priv { |
| 815 |
|
unsigned magic; |
| 816 |
|
#define VBF_OBITER_PRIV_MAGIC 0x3c272a17 |
| 817 |
|
struct busyobj *bo; |
| 818 |
|
// not yet allocated |
| 819 |
|
ssize_t l; |
| 820 |
|
// current allocation |
| 821 |
|
uint8_t *p; |
| 822 |
|
ssize_t pl; |
| 823 |
|
}; |
| 824 |
|
|
| 825 |
|
static int v_matchproto_(objiterate_f) |
| 826 |
429 |
vbf_objiterate(void *priv, unsigned flush, const void *ptr, ssize_t len) |
| 827 |
|
{ |
| 828 |
|
struct vbf_objiter_priv *vop; |
| 829 |
|
ssize_t l; |
| 830 |
429 |
const uint8_t *ps = ptr; |
| 831 |
|
|
| 832 |
429 |
CAST_OBJ_NOTNULL(vop, priv, VBF_OBITER_PRIV_MAGIC); |
| 833 |
429 |
CHECK_OBJ_NOTNULL(vop->bo, BUSYOBJ_MAGIC); |
| 834 |
|
|
| 835 |
429 |
flush &= OBJ_ITER_END; |
| 836 |
|
|
| 837 |
845 |
while (len > 0) { |
| 838 |
429 |
if (vop->pl == 0) { |
| 839 |
416 |
vop->p = NULL; |
| 840 |
416 |
AN(vop->l); |
| 841 |
416 |
vop->pl = vop->l; |
| 842 |
832 |
if (VFP_GetStorage(vop->bo->vfc, &vop->pl, &vop->p) |
| 843 |
416 |
!= VFP_OK) |
| 844 |
13 |
return (1); |
| 845 |
403 |
if (vop->pl < vop->l) |
| 846 |
26 |
vop->l -= vop->pl; |
| 847 |
|
else |
| 848 |
377 |
vop->l = 0; |
| 849 |
403 |
} |
| 850 |
416 |
AN(vop->pl); |
| 851 |
416 |
AN(vop->p); |
| 852 |
|
|
| 853 |
416 |
l = vmin(vop->pl, len); |
| 854 |
416 |
memcpy(vop->p, ps, l); |
| 855 |
793 |
VFP_Extend(vop->bo->vfc, l, |
| 856 |
416 |
flush && l == len ? VFP_END : VFP_OK); |
| 857 |
416 |
ps += l; |
| 858 |
416 |
vop->p += l; |
| 859 |
416 |
len -= l; |
| 860 |
416 |
vop->pl -= l; |
| 861 |
|
} |
| 862 |
416 |
if (flush && vop->bo->vfc->failed == 0) |
| 863 |
377 |
AZ(vop->l); |
| 864 |
416 |
return (0); |
| 865 |
429 |
} |
| 866 |
|
|
| 867 |
|
static const struct fetch_step * v_matchproto_(vbf_state_f) |
| 868 |
429 |
vbf_stp_condfetch(struct worker *wrk, struct busyobj *bo) |
| 869 |
|
{ |
| 870 |
|
struct boc *stale_boc; |
| 871 |
|
enum boc_state_e stale_state; |
| 872 |
|
struct objcore *oc, *stale_oc; |
| 873 |
|
struct vbf_objiter_priv vop[1]; |
| 874 |
|
|
| 875 |
429 |
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC); |
| 876 |
429 |
CHECK_OBJ_NOTNULL(bo, BUSYOBJ_MAGIC); |
| 877 |
429 |
oc = bo->fetch_objcore; |
| 878 |
429 |
CHECK_OBJ_NOTNULL(oc, OBJCORE_MAGIC); |
| 879 |
429 |
stale_oc = bo->stale_oc; |
| 880 |
429 |
CHECK_OBJ_NOTNULL(stale_oc, OBJCORE_MAGIC); |
| 881 |
|
|
| 882 |
429 |
stale_boc = HSH_RefBoc(stale_oc); |
| 883 |
429 |
CHECK_OBJ_ORNULL(stale_boc, BOC_MAGIC); |
| 884 |
429 |
if (stale_boc) { |
| 885 |
|
/* Wait for the stale object to become fully fetched, so |
| 886 |
|
* that we can catch fetch errors, before we unbusy the |
| 887 |
|
* new object. This serves two purposes. First it helps |
| 888 |
|
* with request coalescing, and stops long chains of |
| 889 |
|
* IMS-updated short-TTL objects all streaming from a |
| 890 |
|
* single slow body fetch. Second it makes sure that all |
| 891 |
|
* the object attributes are complete when we copy them |
| 892 |
|
* (this would be an issue for ie OA_GZIPBITS). */ |
| 893 |
52 |
VSLb(bo->vsl, SLT_Notice, |
| 894 |
|
"vsl: Conditional fetch wait for streaming object"); |
| 895 |
|
/* XXX: We should have a VCL controlled timeout here */ |
| 896 |
52 |
stale_state = ObjWaitState(stale_oc, BOS_FINISHED); |
| 897 |
52 |
HSH_DerefBoc(bo->wrk, stale_oc); |
| 898 |
52 |
stale_boc = NULL; |
| 899 |
52 |
if (stale_state != BOS_FINISHED) { |
| 900 |
26 |
assert(stale_state == BOS_FAILED); |
| 901 |
26 |
AN(stale_oc->flags & OC_F_FAILED); |
| 902 |
26 |
} |
| 903 |
52 |
} |
| 904 |
|
|
| 905 |
429 |
AZ(stale_boc); |
| 906 |
429 |
if (stale_oc->flags & OC_F_FAILED) { |
| 907 |
26 |
(void)VFP_Error(bo->vfc, "Template object failed"); |
| 908 |
26 |
vbf_cleanup(bo); |
| 909 |
26 |
wrk->stats->fetch_failed++; |
| 910 |
26 |
return (F_STP_FAIL); |
| 911 |
|
} |
| 912 |
|
|
| 913 |
403 |
if (vbf_beresp2obj(bo)) { |
| 914 |
13 |
vbf_cleanup(bo); |
| 915 |
13 |
wrk->stats->fetch_failed++; |
| 916 |
13 |
return (F_STP_FAIL); |
| 917 |
|
} |
| 918 |
|
|
| 919 |
390 |
if (ObjHasAttr(bo->wrk, stale_oc, OA_ESIDATA)) |
| 920 |
13 |
AZ(ObjCopyAttr(bo->wrk, oc, stale_oc, OA_ESIDATA)); |
| 921 |
|
|
| 922 |
390 |
AZ(ObjCopyAttr(bo->wrk, oc, stale_oc, OA_FLAGS)); |
| 923 |
390 |
if (oc->flags & OC_F_HFM) |
| 924 |
26 |
ObjSetFlag(bo->wrk, oc, OF_IMSCAND, 0); |
| 925 |
390 |
AZ(ObjCopyAttr(bo->wrk, oc, stale_oc, OA_GZIPBITS)); |
| 926 |
|
|
| 927 |
390 |
if (bo->do_stream) |
| 928 |
377 |
VBO_SetState(wrk, bo, BOS_STREAM); |
| 929 |
|
|
| 930 |
390 |
INIT_OBJ(vop, VBF_OBITER_PRIV_MAGIC); |
| 931 |
390 |
vop->bo = bo; |
| 932 |
390 |
vop->l = ObjGetLen(bo->wrk, stale_oc); |
| 933 |
390 |
if (ObjIterate(wrk, stale_oc, vop, vbf_objiterate, 0)) |
| 934 |
13 |
(void)VFP_Error(bo->vfc, "Template object failed"); |
| 935 |
|
|
| 936 |
390 |
if (bo->vfc->failed) { |
| 937 |
13 |
vbf_cleanup(bo); |
| 938 |
13 |
wrk->stats->fetch_failed++; |
| 939 |
13 |
return (F_STP_FAIL); |
| 940 |
|
} |
| 941 |
377 |
return (F_STP_FETCHEND); |
| 942 |
429 |
} |
| 943 |
|
|
| 944 |
|
/*-------------------------------------------------------------------- |
| 945 |
|
* Create synth object |
| 946 |
|
* |
| 947 |
|
* replaces a stale object unless |
| 948 |
|
* - abandoning the bereq or |
| 949 |
|
* - leaving vcl_backend_error with return (deliver) |
| 950 |
|
* |
| 951 |
|
* We do want the stale replacement to avoid an object pileup with short ttl and |
| 952 |
|
* long grace/keep, yet there could exist cases where a cache object is |
| 953 |
|
* deliberately created to momentarily override a stale object. |
| 954 |
|
* |
| 955 |
|
* If this case exists, we should add a vcl veto (e.g. beresp.replace_stale with |
| 956 |
|
* default true) |
| 957 |
|
*/ |
| 958 |
|
|
| 959 |
|
static const struct fetch_step * v_matchproto_(vbf_state_f) |
| 960 |
5291 |
vbf_stp_error(struct worker *wrk, struct busyobj *bo) |
| 961 |
|
{ |
| 962 |
|
ssize_t l, ll, o; |
| 963 |
|
vtim_real now; |
| 964 |
|
uint8_t *ptr; |
| 965 |
|
struct vsb *synth_body; |
| 966 |
|
struct objcore *stale, *oc; |
| 967 |
|
|
| 968 |
5291 |
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC); |
| 969 |
5291 |
CHECK_OBJ_NOTNULL(bo, BUSYOBJ_MAGIC); |
| 970 |
5291 |
oc = bo->fetch_objcore; |
| 971 |
5291 |
CHECK_OBJ_NOTNULL(oc, OBJCORE_MAGIC); |
| 972 |
5291 |
CHECK_OBJ_NOTNULL(oc->boc, BOC_MAGIC); |
| 973 |
5291 |
assert(oc->boc->state < BOS_STREAM); |
| 974 |
5291 |
assert(bo->director_state == DIR_S_NULL); |
| 975 |
|
|
| 976 |
5291 |
if (wrk->vpi->handling != VCL_RET_ERROR) |
| 977 |
5031 |
wrk->stats->fetch_failed++; |
| 978 |
|
|
| 979 |
5291 |
now = W_TIM_real(wrk); |
| 980 |
5291 |
VSLb_ts_busyobj(bo, "Error", now); |
| 981 |
|
|
| 982 |
5291 |
if (oc->stobj->stevedore != NULL) { |
| 983 |
|
// replacing an already fetched object with a "synth" one |
| 984 |
273 |
assert(oc->boc->state < BOS_STREAM); |
| 985 |
273 |
oc->boc->fetched_so_far = 0; |
| 986 |
273 |
ObjFreeObj(bo->wrk, oc); |
| 987 |
273 |
} |
| 988 |
|
|
| 989 |
5291 |
if (bo->storage == NULL) |
| 990 |
312 |
bo->storage = STV_next(); |
| 991 |
|
|
| 992 |
|
// XXX: reset all beresp flags ? |
| 993 |
|
|
| 994 |
5291 |
HTTP_Setup(bo->beresp, bo->ws, bo->vsl, SLT_BerespMethod); |
| 995 |
5291 |
if (bo->err_code > 0) |
| 996 |
858 |
http_PutResponse(bo->beresp, "HTTP/1.1", bo->err_code, |
| 997 |
429 |
bo->err_reason); |
| 998 |
|
else |
| 999 |
4862 |
http_PutResponse(bo->beresp, "HTTP/1.1", 503, |
| 1000 |
|
"Backend fetch failed"); |
| 1001 |
|
|
| 1002 |
5291 |
http_TimeHeader(bo->beresp, "Date: ", now); |
| 1003 |
5291 |
http_SetHeader(bo->beresp, "Server: Varnish"); |
| 1004 |
|
|
| 1005 |
5291 |
stale = bo->stale_oc; |
| 1006 |
5291 |
oc->t_origin = now; |
| 1007 |
5291 |
oc->ttl = 0; |
| 1008 |
5291 |
oc->grace = 0; |
| 1009 |
5291 |
oc->keep = 0; |
| 1010 |
|
|
| 1011 |
5291 |
synth_body = VSB_new_auto(); |
| 1012 |
5291 |
AN(synth_body); |
| 1013 |
|
|
| 1014 |
5291 |
VCL_backend_error_method(bo->vcl, wrk, NULL, bo, synth_body); |
| 1015 |
|
|
| 1016 |
5291 |
AZ(VSB_finish(synth_body)); |
| 1017 |
|
|
| 1018 |
5291 |
if (wrk->vpi->handling == VCL_RET_ABANDON || wrk->vpi->handling == VCL_RET_FAIL) { |
| 1019 |
364 |
VSB_destroy(&synth_body); |
| 1020 |
364 |
return (F_STP_FAIL); |
| 1021 |
|
} |
| 1022 |
|
|
| 1023 |
4927 |
if (wrk->vpi->handling == VCL_RET_RETRY) { |
| 1024 |
156 |
VSB_destroy(&synth_body); |
| 1025 |
156 |
if (bo->retries++ < bo->max_retries) |
| 1026 |
143 |
return (F_STP_RETRY); |
| 1027 |
13 |
VSLb(bo->vsl, SLT_VCL_Error, "Too many retries, failing"); |
| 1028 |
13 |
return (F_STP_FAIL); |
| 1029 |
|
} |
| 1030 |
|
|
| 1031 |
4771 |
assert(wrk->vpi->handling == VCL_RET_DELIVER); |
| 1032 |
|
|
| 1033 |
4771 |
assert(bo->vfc->wrk == bo->wrk); |
| 1034 |
4771 |
assert(bo->vfc->oc == oc); |
| 1035 |
4771 |
assert(bo->vfc->resp == bo->beresp); |
| 1036 |
4771 |
assert(bo->vfc->req == bo->bereq); |
| 1037 |
|
|
| 1038 |
4771 |
if (vbf_beresp2obj(bo)) { |
| 1039 |
26 |
VSB_destroy(&synth_body); |
| 1040 |
26 |
return (F_STP_FAIL); |
| 1041 |
|
} |
| 1042 |
|
|
| 1043 |
4745 |
oc->boc->transit_buffer = 0; |
| 1044 |
|
|
| 1045 |
4745 |
ll = VSB_len(synth_body); |
| 1046 |
4745 |
o = 0; |
| 1047 |
8853 |
while (ll > 0) { |
| 1048 |
4121 |
l = ll; |
| 1049 |
4121 |
if (VFP_GetStorage(bo->vfc, &l, &ptr) != VFP_OK) { |
| 1050 |
13 |
VSB_destroy(&synth_body); |
| 1051 |
13 |
return (F_STP_FAIL); |
| 1052 |
|
} |
| 1053 |
4108 |
l = vmin(l, ll); |
| 1054 |
4108 |
memcpy(ptr, VSB_data(synth_body) + o, l); |
| 1055 |
4108 |
VFP_Extend(bo->vfc, l, l == ll ? VFP_END : VFP_OK); |
| 1056 |
4108 |
ll -= l; |
| 1057 |
4108 |
o += l; |
| 1058 |
|
} |
| 1059 |
4732 |
assert(o == VSB_len(synth_body)); |
| 1060 |
4732 |
AZ(ObjSetU64(wrk, oc, OA_LEN, o)); |
| 1061 |
4732 |
VSB_destroy(&synth_body); |
| 1062 |
4732 |
if (stale != NULL && oc->ttl > 0) |
| 1063 |
286 |
HSH_Kill(stale); |
| 1064 |
4732 |
VBO_SetState(wrk, bo, BOS_FINISHED); |
| 1065 |
4732 |
return (F_STP_DONE); |
| 1066 |
5291 |
} |
| 1067 |
|
|
| 1068 |
|
/*-------------------------------------------------------------------- |
| 1069 |
|
*/ |
| 1070 |
|
|
| 1071 |
|
static const struct fetch_step * v_matchproto_(vbf_state_f) |
| 1072 |
884 |
vbf_stp_fail(struct worker *wrk, struct busyobj *bo) |
| 1073 |
|
{ |
| 1074 |
|
struct objcore *oc; |
| 1075 |
|
|
| 1076 |
884 |
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC); |
| 1077 |
884 |
CHECK_OBJ_NOTNULL(bo, BUSYOBJ_MAGIC); |
| 1078 |
884 |
oc = bo->fetch_objcore; |
| 1079 |
884 |
CHECK_OBJ_NOTNULL(oc, OBJCORE_MAGIC); |
| 1080 |
|
|
| 1081 |
884 |
assert(oc->boc->state < BOS_FINISHED); |
| 1082 |
884 |
VBO_SetState(wrk, bo, BOS_FAILED); |
| 1083 |
884 |
HSH_Kill(oc); |
| 1084 |
884 |
return (F_STP_DONE); |
| 1085 |
|
} |
| 1086 |
|
|
| 1087 |
|
/*-------------------------------------------------------------------- |
| 1088 |
|
*/ |
| 1089 |
|
|
| 1090 |
|
static const struct fetch_step * v_matchproto_(vbf_state_f) |
| 1091 |
0 |
vbf_stp_done(struct worker *wrk, struct busyobj *bo) |
| 1092 |
|
{ |
| 1093 |
|
|
| 1094 |
0 |
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC); |
| 1095 |
0 |
CHECK_OBJ_NOTNULL(bo, BUSYOBJ_MAGIC); |
| 1096 |
0 |
WRONG("Just plain wrong"); |
| 1097 |
0 |
NEEDLESS(return (F_STP_DONE)); |
| 1098 |
|
} |
| 1099 |
|
|
| 1100 |
|
static void v_matchproto_(task_func_t) |
| 1101 |
29796 |
vbf_fetch_thread(struct worker *wrk, void *priv) |
| 1102 |
|
{ |
| 1103 |
|
struct vrt_ctx ctx[1]; |
| 1104 |
|
struct busyobj *bo; |
| 1105 |
|
struct objcore *oc; |
| 1106 |
|
const struct fetch_step *stp; |
| 1107 |
|
|
| 1108 |
29796 |
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC); |
| 1109 |
29796 |
CAST_OBJ_NOTNULL(bo, priv, BUSYOBJ_MAGIC); |
| 1110 |
29796 |
CHECK_OBJ_NOTNULL(bo->req, REQ_MAGIC); |
| 1111 |
29796 |
oc = bo->fetch_objcore; |
| 1112 |
29796 |
CHECK_OBJ_NOTNULL(oc, OBJCORE_MAGIC); |
| 1113 |
|
|
| 1114 |
29796 |
THR_SetBusyobj(bo); |
| 1115 |
29796 |
stp = F_STP_MKBEREQ; |
| 1116 |
29796 |
assert(isnan(bo->t_first)); |
| 1117 |
29796 |
assert(isnan(bo->t_prev)); |
| 1118 |
29796 |
VSLb_ts_busyobj(bo, "Start", W_TIM_real(wrk)); |
| 1119 |
|
|
| 1120 |
29796 |
bo->wrk = wrk; |
| 1121 |
29796 |
wrk->vsl = bo->vsl; |
| 1122 |
|
|
| 1123 |
|
#if 0 |
| 1124 |
|
if (bo->stale_oc != NULL) { |
| 1125 |
|
CHECK_OBJ_NOTNULL(bo->stale_oc, OBJCORE_MAGIC); |
| 1126 |
|
/* We don't want the oc/stevedore ops in fetching thread */ |
| 1127 |
|
if (!ObjCheckFlag(wrk, bo->stale_oc, OF_IMSCAND)) |
| 1128 |
|
(void)HSH_DerefObjCore(wrk, &bo->stale_oc, 0); |
| 1129 |
|
} |
| 1130 |
|
#endif |
| 1131 |
|
|
| 1132 |
29796 |
VCL_TaskEnter(bo->privs); |
| 1133 |
160925 |
while (stp != F_STP_DONE) { |
| 1134 |
131129 |
CHECK_OBJ_NOTNULL(bo, BUSYOBJ_MAGIC); |
| 1135 |
131129 |
assert(oc->boc->refcount >= 1); |
| 1136 |
131129 |
if (oc->boc->state < BOS_REQ_DONE) |
| 1137 |
31030 |
AN(bo->req); |
| 1138 |
|
else |
| 1139 |
100099 |
AZ(bo->req); |
| 1140 |
131129 |
AN(stp); |
| 1141 |
131129 |
AN(stp->name); |
| 1142 |
131129 |
AN(stp->func); |
| 1143 |
131129 |
stp = stp->func(wrk, bo); |
| 1144 |
|
} |
| 1145 |
|
|
| 1146 |
29796 |
assert(bo->director_state == DIR_S_NULL); |
| 1147 |
|
|
| 1148 |
29796 |
INIT_OBJ(ctx, VRT_CTX_MAGIC); |
| 1149 |
29796 |
VCL_Bo2Ctx(ctx, bo); |
| 1150 |
29796 |
VCL_TaskLeave(ctx, bo->privs); |
| 1151 |
29796 |
http_Teardown(bo->bereq); |
| 1152 |
29796 |
http_Teardown(bo->beresp); |
| 1153 |
|
// cannot make assumptions about the number of references here #3434 |
| 1154 |
29796 |
if (bo->bereq_body != NULL) |
| 1155 |
234 |
(void)HSH_DerefObjCore(bo->wrk, &bo->bereq_body); |
| 1156 |
|
|
| 1157 |
29796 |
if (oc->boc->state == BOS_FINISHED) { |
| 1158 |
28912 |
AZ(oc->flags & OC_F_FAILED); |
| 1159 |
57824 |
VSLb(bo->vsl, SLT_Length, "%ju", |
| 1160 |
28912 |
(uintmax_t)ObjGetLen(bo->wrk, oc)); |
| 1161 |
28912 |
} |
| 1162 |
|
// AZ(oc->boc); // XXX |
| 1163 |
|
|
| 1164 |
29796 |
if (bo->stale_oc != NULL) |
| 1165 |
2041 |
(void)HSH_DerefObjCore(wrk, &bo->stale_oc); |
| 1166 |
|
|
| 1167 |
29796 |
wrk->vsl = NULL; |
| 1168 |
29796 |
HSH_DerefBoc(wrk, oc); |
| 1169 |
29796 |
SES_Rel(bo->sp); |
| 1170 |
29796 |
VBO_ReleaseBusyObj(wrk, &bo); |
| 1171 |
29796 |
THR_SetBusyobj(NULL); |
| 1172 |
29796 |
} |
| 1173 |
|
|
| 1174 |
|
/*-------------------------------------------------------------------- |
| 1175 |
|
*/ |
| 1176 |
|
|
| 1177 |
|
void |
| 1178 |
29809 |
VBF_Fetch(struct worker *wrk, struct req *req, struct objcore *oc, |
| 1179 |
|
struct objcore *oldoc, enum vbf_fetch_mode_e mode) |
| 1180 |
|
{ |
| 1181 |
|
enum boc_state_e state; |
| 1182 |
|
struct boc *boc; |
| 1183 |
|
struct busyobj *bo; |
| 1184 |
|
enum task_prio prio; |
| 1185 |
|
const char *how; |
| 1186 |
|
|
| 1187 |
29809 |
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC); |
| 1188 |
29809 |
CHECK_OBJ_NOTNULL(req, REQ_MAGIC); |
| 1189 |
29809 |
CHECK_OBJ_NOTNULL(oc, OBJCORE_MAGIC); |
| 1190 |
29809 |
CHECK_OBJ_ORNULL(oldoc, OBJCORE_MAGIC); |
| 1191 |
|
|
| 1192 |
29809 |
bo = VBO_GetBusyObj(wrk, req); |
| 1193 |
29809 |
CHECK_OBJ_NOTNULL(bo, BUSYOBJ_MAGIC); |
| 1194 |
29809 |
AN(bo->vcl); |
| 1195 |
|
|
| 1196 |
29809 |
boc = HSH_RefBoc(oc); |
| 1197 |
29809 |
CHECK_OBJ_NOTNULL(boc, BOC_MAGIC); |
| 1198 |
29809 |
assert(boc->state < BOS_STREAM); |
| 1199 |
29809 |
boc->transit_buffer = cache_param->transit_buffer; |
| 1200 |
|
|
| 1201 |
29809 |
switch (mode) { |
| 1202 |
|
case VBF_PASS: |
| 1203 |
10335 |
prio = TASK_QUEUE_BO; |
| 1204 |
10335 |
how = "pass"; |
| 1205 |
10335 |
bo->uncacheable = 1; |
| 1206 |
10335 |
break; |
| 1207 |
|
case VBF_NORMAL: |
| 1208 |
18343 |
prio = TASK_QUEUE_BO; |
| 1209 |
18343 |
how = "fetch"; |
| 1210 |
18343 |
break; |
| 1211 |
|
case VBF_BACKGROUND: |
| 1212 |
1131 |
prio = TASK_QUEUE_BG; |
| 1213 |
1131 |
how = "bgfetch"; |
| 1214 |
1131 |
bo->is_bgfetch = 1; |
| 1215 |
1131 |
break; |
| 1216 |
|
default: |
| 1217 |
0 |
WRONG("Wrong fetch mode"); |
| 1218 |
0 |
} |
| 1219 |
|
|
| 1220 |
|
#define REQ_BEREQ_FLAG(l, r, w, d) bo->l = req->l; |
| 1221 |
|
#include "tbl/req_bereq_flags.h" |
| 1222 |
|
|
| 1223 |
|
VSLb(bo->vsl, SLT_Begin, "bereq %ju %s", VXID(req->vsl->wid), how); |
| 1224 |
|
VSLbs(bo->vsl, SLT_VCL_use, TOSTRAND(VCL_Name(bo->vcl))); |
| 1225 |
|
VSLb(req->vsl, SLT_Link, "bereq %ju %s", VXID(bo->vsl->wid), how); |
| 1226 |
|
|
| 1227 |
|
THR_SetBusyobj(bo); |
| 1228 |
|
|
| 1229 |
|
bo->sp = req->sp; |
| 1230 |
|
SES_Ref(bo->sp); |
| 1231 |
|
|
| 1232 |
|
oc->boc->vary = req->vary_b; |
| 1233 |
|
req->vary_b = NULL; |
| 1234 |
|
|
| 1235 |
|
HSH_Ref(oc); |
| 1236 |
29809 |
AZ(bo->fetch_objcore); |
| 1237 |
|
bo->fetch_objcore = oc; |
| 1238 |
|
|
| 1239 |
29809 |
AZ(bo->stale_oc); |
| 1240 |
29809 |
if (oldoc != NULL) { |
| 1241 |
2054 |
assert(oldoc->refcnt > 0); |
| 1242 |
2054 |
HSH_Ref(oldoc); |
| 1243 |
2054 |
bo->stale_oc = oldoc; |
| 1244 |
2054 |
} |
| 1245 |
|
|
| 1246 |
29809 |
AZ(bo->req); |
| 1247 |
|
bo->req = req; |
| 1248 |
|
|
| 1249 |
|
bo->fetch_task->priv = bo; |
| 1250 |
|
bo->fetch_task->func = vbf_fetch_thread; |
| 1251 |
|
|
| 1252 |
29809 |
if (Pool_Task(wrk->pool, bo->fetch_task, prio)) { |
| 1253 |
31 |
wrk->stats->bgfetch_no_thread++; |
| 1254 |
31 |
VSLb(bo->vsl, SLT_FetchError, |
| 1255 |
|
"No thread available for bgfetch"); |
| 1256 |
31 |
(void)vbf_stp_fail(req->wrk, bo); |
| 1257 |
31 |
if (bo->stale_oc != NULL) |
| 1258 |
13 |
(void)HSH_DerefObjCore(wrk, &bo->stale_oc); |
| 1259 |
31 |
HSH_DerefBoc(wrk, oc); |
| 1260 |
31 |
SES_Rel(bo->sp); |
| 1261 |
31 |
THR_SetBusyobj(NULL); |
| 1262 |
31 |
VBO_ReleaseBusyObj(wrk, &bo); |
| 1263 |
31 |
} else { |
| 1264 |
29778 |
THR_SetBusyobj(NULL); |
| 1265 |
29778 |
bo = NULL; /* ref transferred to fetch thread */ |
| 1266 |
29778 |
if (mode == VBF_BACKGROUND) { |
| 1267 |
1118 |
(void)ObjWaitState(oc, BOS_REQ_DONE); |
| 1268 |
1118 |
(void)VRB_Ignore(req); |
| 1269 |
1118 |
} else { |
| 1270 |
28660 |
state = ObjWaitState(oc, BOS_STREAM); |
| 1271 |
28660 |
AZ(oc->flags & OC_F_BUSY); |
| 1272 |
28660 |
if (state == BOS_FAILED) |
| 1273 |
351 |
AN(oc->flags & OC_F_FAILED); |
| 1274 |
|
} |
| 1275 |
|
} |
| 1276 |
29809 |
AZ(bo); |
| 1277 |
|
VSLb_ts_req(req, "Fetch", W_TIM_real(wrk)); |
| 1278 |
29809 |
assert(oc->boc == boc); |
| 1279 |
|
HSH_DerefBoc(wrk, oc); |
| 1280 |
29809 |
if (mode == VBF_BACKGROUND) |
| 1281 |
1131 |
(void)HSH_DerefObjCore(wrk, &oc); |
| 1282 |
|
} |