d30b88a6cc
As reported by @tianon on GH #3168, running haproxy on 32bits i386 platform would trigger the following BUG_ON() statement: FATAL: bug condition "sizeof(struct shm_stats_file_object) != 544" matched at src/stats-file.c:825 shm_stats_file_object struct size changed, is is part of the exported API: ensure all precautions were taken (ie: shm_stats_file version change) before adjusting this In fact, some efforts were already taken to ensure shm_stats_file_object struct size remains consistent on 64 vs 32 bits platforms, since shm_stats_file_object is part of the public API and directly exposed in the stats file. However, some parts were overlooked: some structs that are embedded in shm_stats_file_object struct itself weren't using fixed-width integers, and would sometime be unaligned. The result of this is that it was up to the compiler (platform-dependent) to choose how to deal with such ambiguities, which could cause the struct mapping/size to be inconsistent from one platform to another. Hopefully this was caught by the BUG_ON() statement and with the precious help of @tianon To fix this, we now use fixed-width integers everywhere for members (and submembers) of shm_stats_file_object struct, and we use explicit padding where missing to avoid automatic padding when we don't expect one. As for the previous commit, we leverage FIXED_SIZE() and FIXED_SIZE_ARRAY() macro to set the expected width for each integer without causing build issues on platform that don't support larger integers. No backport needed, this feature was introduced during 3.3-dev. |
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HAProxy
HAProxy is a free, very fast and reliable reverse-proxy offering high availability, load balancing, and proxying for TCP and HTTP-based applications.
Installation
The INSTALL file describes how to build HAProxy. A list of packages is also available on the wiki.
Getting help
The discourse and the mailing-list are available for questions or configuration assistance. You can also use the slack or IRC channel. Please don't use the issue tracker for these.
The issue tracker is only for bug reports or feature requests.
Documentation
The HAProxy documentation has been split into a number of different files for ease of use. It is available in text format as well as HTML. The wiki is also meant to replace the old architecture guide.
Please refer to the following files depending on what you're looking for:
- INSTALL for instructions on how to build and install HAProxy
- BRANCHES to understand the project's life cycle and what version to use
- LICENSE for the project's license
- CONTRIBUTING for the process to follow to submit contributions
The more detailed documentation is located into the doc/ directory:
- doc/intro.txt for a quick introduction on HAProxy
- doc/configuration.txt for the configuration's reference manual
- doc/lua.txt for the Lua's reference manual
- doc/SPOE.txt for how to use the SPOE engine
- doc/network-namespaces.txt for how to use network namespaces under Linux
- doc/management.txt for the management guide
- doc/regression-testing.txt for how to use the regression testing suite
- doc/peers.txt for the peers protocol reference
- doc/coding-style.txt for how to adopt HAProxy's coding style
- doc/internals for developer-specific documentation (not all up to date)
License
HAProxy is licensed under GPL 2 or any later version, the headers under LGPL 2.1. See the LICENSE file for a more detailed explanation.