| 1 | #!/bin/bash |
| 2 | |
| 3 | # Copied from blktests |
| 4 | get_ipv4_addr() |
| 5 | { |
| 6 | ip -4 -o addr show dev "$1" | |
| 7 | sed -n 's/.*[[:blank:]]inet[[:blank:]]*\([^[:blank:]/]*\).*/\1/p' | |
| 8 | head -1 | tr -d '\n' |
| 9 | } |
| 10 | |
| 11 | get_ipv6_addr() { |
| 12 | ipv6=$(ip -6 -o addr show dev "$1" | |
| 13 | sed -n 's/.*[[:blank:]]inet6[[:blank:]]*\([^[:blank:]/]*\).*/\1/p' | |
| 14 | head -1 | tr -d '\n') |
| 15 | |
| 16 | [ $? -eq 0 ] || return |
| 17 | |
| 18 | if [[ "$ipv6" =~ ^fe80: ]]; then |
| 19 | echo -n "[$ipv6%$1]" |
| 20 | else |
| 21 | echo -n "[$ipv6]" |
| 22 | fi |
| 23 | } |
| 24 | |
| 25 | # existing rdma interfaces |
| 26 | rdma_interfaces() |
| 27 | { |
| 28 | rdma link show | sed -nE 's/^link .* netdev ([^ ]+).*$/\1 /p' | |
| 29 | grep -Ev '^(lo|tun|tap)' |
| 30 | } |
| 31 | |
| 32 | # existing valid ipv4 interfaces |
| 33 | ipv4_interfaces() |
| 34 | { |
| 35 | ip -o addr show | awk '/inet / {print $2}' | grep -Ev '^(lo|tun|tap)' |
| 36 | } |
| 37 | |
| 38 | ipv6_interfaces() |
| 39 | { |
| 40 | ip -o addr show | awk '/inet6 / {print $2}' | grep -Ev '^(lo|tun|tap)' |
| 41 | } |
| 42 | |
| 43 | rdma_rxe_detect() |
| 44 | { |
| 45 | family=$1 |
| 46 | for r in $(rdma_interfaces) |
| 47 | do |
| 48 | "$family"_interfaces | grep -qw $r && get_"$family"_addr $r && return |
| 49 | done |
| 50 | |
| 51 | return 1 |
| 52 | } |
| 53 | |
| 54 | rdma_rxe_setup() |
| 55 | { |
| 56 | family=$1 |
| 57 | for i in $("$family"_interfaces) |
| 58 | do |
| 59 | if rdma_interfaces | grep -qw $i; then |
| 60 | echo "$family: Reuse the existing rdma/rxe ${i}_rxe" \ |
| 61 | "for $i with $(get_"$family"_addr $i)" |
| 62 | return |
| 63 | fi |
| 64 | |
| 65 | rdma link add "${i}_rxe" type rxe netdev "$i" && { |
| 66 | echo "$family: Setup new rdma/rxe ${i}_rxe" \ |
| 67 | "for $i with $(get_"$family"_addr $i)" |
| 68 | return |
| 69 | } |
| 70 | done |
| 71 | |
| 72 | echo "$family: Failed to setup any new rdma/rxe link" >&2 |
| 73 | return 1 |
| 74 | } |
| 75 | |
| 76 | rdma_rxe_clean() |
| 77 | { |
| 78 | modprobe -r rdma_rxe |
| 79 | } |
| 80 | |
| 81 | IP_FAMILY=${IP_FAMILY:-ipv4} |
| 82 | if [ "$IP_FAMILY" != "ipv6" ] && [ "$IP_FAMILY" != "ipv4" ]; then |
| 83 | echo "Unknown ip family '$IP_FAMILY', only ipv4 or ipv6 is supported." >&2 |
| 84 | exit 1 |
| 85 | fi |
| 86 | |
| 87 | operation=${1:-detect} |
| 88 | |
| 89 | command -v rdma >/dev/null || { |
| 90 | echo "Command 'rdma' is not available, please install it first." >&2 |
| 91 | exit 1 |
| 92 | } |
| 93 | |
| 94 | if [ "$operation" == "setup" ] || [ "$operation" == "clean" ]; then |
| 95 | [ "$UID" == 0 ] || { |
| 96 | echo "Root privilege is required to setup/clean a rdma/rxe link" >&2 |
| 97 | exit 1 |
| 98 | } |
| 99 | if [ "$operation" == "setup" ]; then |
| 100 | rdma_rxe_setup ipv4 |
| 101 | rdma_rxe_setup ipv6 |
| 102 | else |
| 103 | rdma_rxe_clean |
| 104 | fi |
| 105 | elif [ "$operation" == "detect" ]; then |
| 106 | rdma_rxe_detect "$IP_FAMILY" |
| 107 | else |
| 108 | echo "Usage: $0 [setup | detect | clean]" |
| 109 | fi |