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Implicit fields are fields that are registered with the report and reported internally by libdevmapper itself (compared to explicit fields that are registered by the layer above libdevmapper - e.g. LVM, dmsetup...). The "selected" field is the implicit field (for now the only one) that reports the result of the selection. Since the selection itself is the property of the libdevmapper, the upper layer using dm_report_init can't register this field itself and it must be done directly at libdevmapper layer. The "selected" field is internally registered as part of the "common" report type with id 0x80000000 (the last bit in uin32_t) which is then reserved (the explicit report types are then checked if they do not contain this id and if yes, we error out). This way, the "selected" field is recognized by all libdevmapper users that initialize the reporting with "dm_report_init_with_selection". If reporting is initialized with the classical "dm_report_init", there's no functional change (so the "selected" field is not defined and it's not recognized).
This tree contains the LVM2 and device-mapper tools and libraries. For more information about LVM2 read the changelog in the WHATS_NEW file. Installation instructions are in INSTALL. There is no warranty - see COPYING and COPYING.LIB. Tarballs are available from: ftp://sources.redhat.com/pub/lvm2/ The source code is stored in git: http://git.fedorahosted.org/git/lvm2.git git clone git://git.fedorahosted.org/git/lvm2.git Mailing list for general discussion related to LVM2: linux-lvm@redhat.com Subscribe from https://www.redhat.com/mailman/listinfo/linux-lvm Mailing lists for LVM2 development, patches and commits: lvm-devel@redhat.com Subscribe from https://www.redhat.com/mailman/listinfo/linux-lvm lvm2-commits@lists.fedorahosted.org (Read-only archive of commits) Subscribe from https://fedorahosted.org/mailman/listinfo/lvm2-commits Mailing list for device-mapper development, including kernel patches and multipath-tools: dm-devel@redhat.com Subscribe from https://www.redhat.com/mailman/listinfo/dm-devel The source code repository used until 7th June 2012 is accessible here: http://sources.redhat.com/cgi-bin/cvsweb.cgi/LVM2/?cvsroot=lvm2.