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Upstream zone: store peers->name and its data in shared memory.

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The shared objects should generally be allocated from shared memory.
While peers->name and the data it points to allocated from cf->pool
happened to work on UNIX, it broke on Windows.  On UNIX this worked
only because the shared memory zone for upstreams is re-created for
every new configuration.

But on Windows, a worker process does not inherit the address space
of the master process, so the peers->name pointed to data allocated
from cf->pool by the master process, and was invalid.
This commit is contained in:
Ruslan Ermilov 2017-08-01 19:12:10 +03:00
parent b992f7259b
commit d846f27638
2 changed files with 36 additions and 0 deletions
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18
src/http/modules/ngx_http_upstream_zone_module.c
View File

@ -185,6 +185,7 @@ static ngx_http_upstream_rr_peers_t *
ngx_http_upstream_zone_copy_peers(ngx_slab_pool_t *shpool,
ngx_http_upstream_srv_conf_t *uscf)
{
ngx_str_t *name;
ngx_http_upstream_rr_peer_t *peer, **peerp;
ngx_http_upstream_rr_peers_t *peers, *backup;
@ -195,6 +196,21 @@ ngx_http_upstream_zone_copy_peers(ngx_slab_pool_t *shpool,
ngx_memcpy(peers, uscf->peer.data, sizeof(ngx_http_upstream_rr_peers_t));
name = ngx_slab_alloc(shpool, sizeof(ngx_str_t));
if (name == NULL) {
return NULL;
}
name->data = ngx_slab_alloc(shpool, peers->name->len);
if (name->data == NULL) {
return NULL;
}
ngx_memcpy(name->data, peers->name->data, peers->name->len);
name->len = peers->name->len;
peers->name = name;
peers->shpool = shpool;
for (peerp = &peers->peer; *peerp; peerp = &peer->next) {
@ -221,6 +237,8 @@ ngx_http_upstream_zone_copy_peers(ngx_slab_pool_t *shpool,
ngx_memcpy(backup, peers->next, sizeof(ngx_http_upstream_rr_peers_t));
backup->name = name;
backup->shpool = shpool;
for (peerp = &backup->peer; *peerp; peerp = &peer->next) {

18
src/stream/ngx_stream_upstream_zone_module.c
View File

@ -182,6 +182,7 @@ static ngx_stream_upstream_rr_peers_t *
ngx_stream_upstream_zone_copy_peers(ngx_slab_pool_t *shpool,
ngx_stream_upstream_srv_conf_t *uscf)
{
ngx_str_t *name;
ngx_stream_upstream_rr_peer_t *peer, **peerp;
ngx_stream_upstream_rr_peers_t *peers, *backup;
@ -192,6 +193,21 @@ ngx_stream_upstream_zone_copy_peers(ngx_slab_pool_t *shpool,
ngx_memcpy(peers, uscf->peer.data, sizeof(ngx_stream_upstream_rr_peers_t));
name = ngx_slab_alloc(shpool, sizeof(ngx_str_t));
if (name == NULL) {
return NULL;
}
name->data = ngx_slab_alloc(shpool, peers->name->len);
if (name->data == NULL) {
return NULL;
}
ngx_memcpy(name->data, peers->name->data, peers->name->len);
name->len = peers->name->len;
peers->name = name;
peers->shpool = shpool;
for (peerp = &peers->peer; *peerp; peerp = &peer->next) {
@ -218,6 +234,8 @@ ngx_stream_upstream_zone_copy_peers(ngx_slab_pool_t *shpool,
ngx_memcpy(backup, peers->next, sizeof(ngx_stream_upstream_rr_peers_t));
backup->name = name;
backup->shpool = shpool;
for (peerp = &backup->peer; *peerp; peerp = &peer->next) {