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Ceph is a distributed object, block, and file storage platform
41e16a3b40
During a test_librbd_fsx run including flatten, ImageCtx->parent was being dereferenced while null. Between the time the parent overlap is calculated and the time the guard+write completes with ENOENT and submits the copyup+write, the parent image could have changed (by resize) or been made irrelevant (by child flatten) such that the parent overlap is now incorrect. Handle "no parent" by just sending the copyup+write; the copyup part will be a no-op. Move to WRITE_FLAT state in this case because there's no more child to deal with. Handle "overlap changed" by recalculating overlap before reading parent data; if none is left, don't read, but rather just clear m_object_image_extents, in which case the copyup will again be a no-op because it will be of zero length. However we still have a parent, so stay in WRITE_COPYUP state and come back through as usual. Signed-off-by: Dan Mick <dan.mick@inktank.com> Fixes: #3524 |
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| ceph.spec.in | ||
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============================================ Ceph - a scalable distributed storage system ============================================ Please see http://ceph.com/ for current info. Contributing Code ================= Most of Ceph is licensed under the LGPL version 2.1. Some miscellaneous code is under BSD-style license or is public domain. The documentation is licensed under Creative Commons Attribution-ShareAlike (CC BY-SA). There are a handful of headers included here that are licensed under the GPL. Please see the file COPYING for a full inventory of licenses by file. Code contributions must include a valid "Signed-off-by" acknowledging the license for the modified or contributed file. Please see the file SubmittingPatches for details on what that means and on how to generate and submit patches. We do not require assignment of copyright to contribute code; code is contributed under the terms of the applicable license. Building Ceph ============= To prepare the source tree after it has been git cloned, $ git submodule update --init To build the server daemons, and FUSE client, execute the following: $ ./autogen.sh $ ./configure $ make (Note that the FUSE client will only be built if libfuse is present.) Dependencies ------------ The configure script will complain about any missing dependencies as it goes. You can also refer to debian/control or ceph.spec.in for the package build dependencies on those platforms. In many cases, dependencies can be avoided with --with-foo or --without-bar switches. For example, $ ./configure --with-nss # use libnss instead of libcrypto++ $ ./configure --without-radosgw # do not build radosgw and avoid libfcgi-dev $ ./configure --without-tcmalloc # avoid google-perftools dependency Building packages ----------------- You can build packages for Debian or Debian-derived (e.g., Ubuntu) systems with $ sudo apt-get dpkg-dev $ dpkg-checkbuilddeps # make sure we have all dependencies $ dpkg-buildpackage For RPM-based systems (Redhat, Suse, etc.), $ rpmbuild Building the Documentation ========================== Prerequisites ------------- To build the documentation, you must install the following: - python-dev - python-pip - python-virualenv - doxygen - ditaa - libxml2-dev - libxslt-dev - dot - graphviz For example: sudo apt-get install python-dev python-pip python-virualenv doxygen ditaa libxml2-dev libxslt-dev dot graphviz Building the Documentation -------------------------- To build the documentation, ensure that you are in the top-level `/ceph directory, and execute the build script. For example: $ admin/build-doc Build Prerequisites ------------------- To build the source code, you must install the following: - automake - autoconf - automake - gcc - g++ - libboost-dev - libedit-dev - libssl-dev - libtool - libfcgi - libfcgi-dev - libfuse-dev - linux-kernel-headers - libcrypto++-dev - libaio-dev - libgoogle-perftools-dev - libkeyutils-dev - uuid-dev - libatomic-ops-dev - libboost-program-options-dev - libboost-thread-dev For example: $ apt-get install automake autoconf automake gcc g++ libboost-dev libedit-dev libssl-dev libtool libfcgi libfcgi-dev libfuse-dev linux-kernel-headers libcrypto++-dev libaio-dev libgoogle-perftools-dev libkeyutils-dev uuid-dev libatomic-ops-dev libboost-program-options-dev libboost-thread-dev