Documentation: nfs: convert pnfs-block-server to ReST
Convert pnfs-block-server.txt to ReST and move it to admin-guide. Content remains mostly unchanged. Signed-off-by: Daniel W. S. Almeida <dwlsalmeida@gmail.com> Link: https://lore.kernel.org/r/c06903760e690c16d9df92f5e75f80381d6326d8.1578697871.git.dwlsalmeida@gmail.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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@ -10,3 +10,4 @@ NFS
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nfs-rdma
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nfsd-admin-interfaces
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nfs-idmapper
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pnfs-block-server
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@ -1,4 +1,6 @@
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===================================
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pNFS block layout server user guide
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===================================
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The Linux NFS server now supports the pNFS block layout extension. In this
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case the NFS server acts as Metadata Server (MDS) for pNFS, which in addition
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@ -22,16 +24,19 @@ If the nfsd server needs to fence a non-responding client it calls
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/sbin/nfsd-recall-failed with the first argument set to the IP address of
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the client, and the second argument set to the device node without the /dev
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prefix for the file system to be fenced. Below is an example file that shows
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how to translate the device into a serial number from SCSI EVPD 0x80:
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how to translate the device into a serial number from SCSI EVPD 0x80::
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cat > /sbin/nfsd-recall-failed << EOF
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#!/bin/sh
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cat > /sbin/nfsd-recall-failed << EOF
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CLIENT="$1"
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DEV="/dev/$2"
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EVPD=`sg_inq --page=0x80 ${DEV} | \
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grep "Unit serial number:" | \
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awk -F ': ' '{print $2}'`
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.. code-block:: sh
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echo "fencing client ${CLIENT} serial ${EVPD}" >> /var/log/pnfsd-fence.log
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EOF
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#!/bin/sh
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CLIENT="$1"
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DEV="/dev/$2"
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EVPD=`sg_inq --page=0x80 ${DEV} | \
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grep "Unit serial number:" | \
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awk -F ': ' '{print $2}'`
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echo "fencing client ${CLIENT} serial ${EVPD}" >> /var/log/pnfsd-fence.log
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EOF
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