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* blkmapd: dump useful device information to syslogChristoph Hellwig2014-08-131-1/+5
| | | | | | | | Dump some information about used devices to syslog so that an admin can troubleshoot failing blocklayout mounts. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Steve Dickson <steved@redhat.com>
* blkmapd: fix broken multipath handlingChristoph Hellwig2014-08-131-23/+4
| | | | | | | | | | | | | | | | | We do want to use the dm-multipath device if it exists, which the code is generally prepared for, except that this check excludes them early. In addition this will also add the passive path to the device list, which is harmless if an active one exists as that or the multipath device will be preferred, and at least allows us to work if it doesn't. Also fix up the check if an path needs to be updated to remove the silly partition check - pNFS block offset are relative to the device so partion should never match it instead of the full device. On the other hand the simplistic check easily creates false positives, e.g. dm-10 is considered a partition of dm-1. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Steve Dickson <steved@redhat.com>
* blkmapd: proper signal handlingPeng Tao2012-08-231-1/+17
| | | | | Signed-off-by: Peng Tao <tao.peng@emc.com> Signed-off-by: Steve Dickson <steved@redhat.com>
* blkmapd: allow blocklayoutdriver module to load/unloadPeng Tao2012-08-231-20/+84
| | | | | | | | User may load/unload blocklayoutdriver module dynanmically. So we handle it by watching the pipe file creation/deletion. Signed-off-by: Peng Tao <tao.peng@emc.com> Signed-off-by: Steve Dickson <steved@redhat.com>
* blkmapd: Add complex block layout discovery and mapping daemonSteve Dickson2011-09-221-0/+453
This daemon is required to handle upcalls from the kernel pnfs block layout driver. Signed-off-by: Jim Rees <rees@umich.edu> Signed-off-by: Steve Dickson <steved@redhat.com>