Mercurial > hg > nginx
view auto/lib/libatomic/conf @ 4895:508e61393b6c
Event pipe: fixed handling of buf_to_file data.
Input filter might free a buffer if there is no data in it, and in case
of first buffer (used for cache header and request header, aka p->buf_to_file)
this resulted in cache corruption. Buffer memory was reused to read upstream
response before headers were written to disk.
Fix is to avoid moving pointers in ngx_event_pipe_add_free_buf() to a buffer
start if we were asked to free a buffer used by p->buf_to_file.
This fixes occasional cache file corruption, usually resulted
in "cache file ... has md5 collision" alerts.
Reported by Anatoli Marinov.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Tue, 30 Oct 2012 11:14:24 +0000 |
parents | d620f497c50f |
children |
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# Copyright (C) Igor Sysoev # Copyright (C) Nginx, Inc. if [ $NGX_LIBATOMIC != YES ]; then have=NGX_HAVE_LIBATOMIC . auto/have CORE_INCS="$CORE_INCS $NGX_LIBATOMIC/src" LINK_DEPS="$LINK_DEPS $NGX_LIBATOMIC/src/libatomic_ops.a" CORE_LIBS="$CORE_LIBS $NGX_LIBATOMIC/src/libatomic_ops.a" else ngx_feature="atomic_ops library" ngx_feature_name=NGX_HAVE_LIBATOMIC ngx_feature_run=yes ngx_feature_incs="#define AO_REQUIRE_CAS #include <atomic_ops.h>" ngx_feature_path= ngx_feature_libs="-latomic_ops" ngx_feature_test="long n = 0; if (!AO_compare_and_swap(&n, 0, 1)) return 1; if (AO_fetch_and_add(&n, 1) != 1) return 1; if (n != 2) return 1; AO_nop();" . auto/feature if [ $ngx_found = yes ]; then CORE_LIBS="$CORE_LIBS $ngx_feature_libs" else cat << END $0: error: libatomic_ops library was not found. END exit 1 fi fi