#!/bin/bash
# diag.sh - diagnostic commands run on a host via SSH wrapper.
HOST="$1"
SSH_OPTS=(-o BatchMode=yes -o ConnectTimeout=8 -o StrictHostKeyChecking=accept-new)

echo "===== 1. storage.cfg NFS stanzas (exact content) ====="
ssh "${SSH_OPTS[@]}" "root@$HOST" 'grep -A 8 "^nfs: D2" /etc/pve/storage.cfg'

echo ""
echo "===== 2. Try manual NFS mount with nconnect=4 ====="
ssh "${SSH_OPTS[@]}" "root@$HOST" 'mount -t nfs -o nconnect=4,noatime,rsize=1048576,wsize=1048576,hard,proto=tcp pfv-tsys4-nfs-stor:/mnt/tsys4/D2 /mnt/pve/D2 2>&1; echo "exit=$?"'

echo ""
echo "===== 3. Try manual NFS mount WITHOUT nconnect ====="
ssh "${SSH_OPTS[@]}" "root@$HOST" 'mount -t nfs -o noatime,rsize=1048576,wsize=1048576,hard,proto=tcp pfv-tsys4-nfs-stor:/mnt/tsys4/D2 /mnt/pve/D2 2>&1; echo "exit=$?"'

echo ""
echo "===== 4. NFS kernel version / module ====="
ssh "${SSH_OPTS[@]}" "root@$HOST" 'cat /proc/fs/nfsfs/version 2>/dev/null; echo "---"; modinfo nfs 2>/dev/null | grep -E "^(filename|version|description)" | head -5'

echo ""
echo "===== 5. mount.nfs version ====="
ssh "${SSH_OPTS[@]}" "root@$HOST" 'mount.nfs --version 2>&1; echo "---"; dpkg -l nfs-common 2>/dev/null | tail -2'

echo ""
echo "===== 6. /etc/network/interfaces bond0 stanza (exact bytes) ====="
ssh "${SSH_OPTS[@]}" "root@$HOST" 'sed -n "/^auto bond0/,/^$/p" /etc/network/interfaces | cat -A'

echo ""
echo "===== 7. Current bond0 running hash policy ====="
ssh "${SSH_OPTS[@]}" "root@$HOST" 'cat /proc/net/bonding/bond0 | head -5'

echo ""
echo "===== 8. xmit_hash_policy sysfs file ====="
ssh "${SSH_OPTS[@]}" "root@$HOST" 'cat /sys/class/net/bond0/bonding/xmit_hash_policy 2>/dev/null; echo "---"; ls /sys/class/net/bond0/bonding/ 2>/dev/null'