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1#
2# Common functions used by pktgen scripts
3# - Depending on bash 3 (or higher) syntax
4#
5# Author: Jesper Dangaaard Brouer
6# License: GPL
7
8## -- General shell logging cmds --
9function err() {
10 local exitcode=$1
11 shift
12 echo "ERROR: $@" >&2
13 exit $exitcode
14}
15
16function warn() {
17 echo "WARN : $@" >&2
18}
19
20function info() {
21 if [[ -n "$VERBOSE" ]]; then
22 echo "INFO : $@" >&2
23 fi
24}
25
26## -- Pktgen proc config commands -- ##
27export PROC_DIR=/proc/net/pktgen
28#
29# Three different shell functions for configuring the different
30# components of pktgen:
31# pg_ctrl(), pg_thread() and pg_set().
32#
33# These functions correspond to pktgens different components.
34# * pg_ctrl() control "pgctrl" (/proc/net/pktgen/pgctrl)
35# * pg_thread() control the kernel threads and binding to devices
36# * pg_set() control setup of individual devices
37function pg_ctrl() {
38 local proc_file="pgctrl"
39 proc_cmd ${proc_file} "$@"
40}
41
42function pg_thread() {
43 local thread=$1
44 local proc_file="kpktgend_${thread}"
45 shift
46 proc_cmd ${proc_file} "$@"
47}
48
49function pg_set() {
50 local dev=$1
51 local proc_file="$dev"
52 shift
53 proc_cmd ${proc_file} "$@"
54}
55
56# More generic replacement for pgset(), that does not depend on global
57# variable for proc file.
58function proc_cmd() {
59 local result
60 local proc_file=$1
61 # after shift, the remaining args are contained in $@
62 shift
63 local proc_ctrl=${PROC_DIR}/$proc_file
64 if [[ ! -e "$proc_ctrl" ]]; then
65 err 3 "proc file:$proc_ctrl does not exists (dev added to thread?)"
66 else
67 if [[ ! -w "$proc_ctrl" ]]; then
68 err 4 "proc file:$proc_ctrl not writable, not root?!"
69 fi
70 fi
71
72 if [[ "$DEBUG" == "yes" ]]; then
73 echo "cmd: $@ > $proc_ctrl"
74 fi
75 # Quoting of "$@" is important for space expansion
76 echo "$@" > "$proc_ctrl"
77 local status=$?
78
79 result=$(grep "Result: OK:" $proc_ctrl)
80 # Due to pgctrl, cannot use exit code $? from grep
81 if [[ "$result" == "" ]]; then
82 grep "Result:" $proc_ctrl >&2
83 fi
84 if (( $status != 0 )); then
85 err 5 "Write error($status) occurred cmd: \"$@ > $proc_ctrl\""
86 fi
87}
88
89# Old obsolete "pgset" function, with slightly improved err handling
90function pgset() {
91 local result
92
93 if [[ "$DEBUG" == "yes" ]]; then
94 echo "cmd: $1 > $PGDEV"
95 fi
96 echo $1 > $PGDEV
97 local status=$?
98
99 result=`cat $PGDEV | fgrep "Result: OK:"`
100 if [[ "$result" == "" ]]; then
101 cat $PGDEV | fgrep Result:
102 fi
103 if (( $status != 0 )); then
104 err 5 "Write error($status) occurred cmd: \"$1 > $PGDEV\""
105 fi
106}
107
108## -- General shell tricks --
109
110function root_check_run_with_sudo() {
111 # Trick so, program can be run as normal user, will just use "sudo"
112 # call as root_check_run_as_sudo "$@"
113 if [ "$EUID" -ne 0 ]; then
114 if [ -x $0 ]; then # Directly executable use sudo
115 info "Not root, running with sudo"
116 sudo "$0" "$@"
117 exit $?
118 fi
119 err 4 "cannot perform sudo run of $0"
120 fi
121}
1#
2# Common functions used by pktgen scripts
3# - Depending on bash 3 (or higher) syntax
4#
5# Author: Jesper Dangaaard Brouer
6# License: GPL
7
8## -- General shell logging cmds --
9function err() {
10 local exitcode=$1
11 shift
12 echo "ERROR: $@" >&2
13 exit $exitcode
14}
15
16function warn() {
17 echo "WARN : $@" >&2
18}
19
20function info() {
21 if [[ -n "$VERBOSE" ]]; then
22 echo "INFO : $@" >&2
23 fi
24}
25
26## -- Pktgen proc config commands -- ##
27export PROC_DIR=/proc/net/pktgen
28#
29# Three different shell functions for configuring the different
30# components of pktgen:
31# pg_ctrl(), pg_thread() and pg_set().
32#
33# These functions correspond to pktgens different components.
34# * pg_ctrl() control "pgctrl" (/proc/net/pktgen/pgctrl)
35# * pg_thread() control the kernel threads and binding to devices
36# * pg_set() control setup of individual devices
37function pg_ctrl() {
38 local proc_file="pgctrl"
39 proc_cmd ${proc_file} "$@"
40}
41
42function pg_thread() {
43 local thread=$1
44 local proc_file="kpktgend_${thread}"
45 shift
46 proc_cmd ${proc_file} "$@"
47}
48
49function pg_set() {
50 local dev=$1
51 local proc_file="$dev"
52 shift
53 proc_cmd ${proc_file} "$@"
54}
55
56# More generic replacement for pgset(), that does not depend on global
57# variable for proc file.
58function proc_cmd() {
59 local result
60 local proc_file=$1
61 # after shift, the remaining args are contained in $@
62 shift
63 local proc_ctrl=${PROC_DIR}/$proc_file
64 if [[ ! -e "$proc_ctrl" ]]; then
65 err 3 "proc file:$proc_ctrl does not exists (dev added to thread?)"
66 else
67 if [[ ! -w "$proc_ctrl" ]]; then
68 err 4 "proc file:$proc_ctrl not writable, not root?!"
69 fi
70 fi
71
72 if [[ "$DEBUG" == "yes" ]]; then
73 echo "cmd: $@ > $proc_ctrl"
74 fi
75 # Quoting of "$@" is important for space expansion
76 echo "$@" > "$proc_ctrl"
77 local status=$?
78
79 result=$(grep "Result: OK:" $proc_ctrl)
80 # Due to pgctrl, cannot use exit code $? from grep
81 if [[ "$result" == "" ]]; then
82 grep "Result:" $proc_ctrl >&2
83 fi
84 if (( $status != 0 )); then
85 err 5 "Write error($status) occurred cmd: \"$@ > $proc_ctrl\""
86 fi
87}
88
89# Old obsolete "pgset" function, with slightly improved err handling
90function pgset() {
91 local result
92
93 if [[ "$DEBUG" == "yes" ]]; then
94 echo "cmd: $1 > $PGDEV"
95 fi
96 echo $1 > $PGDEV
97 local status=$?
98
99 result=`cat $PGDEV | fgrep "Result: OK:"`
100 if [[ "$result" == "" ]]; then
101 cat $PGDEV | fgrep Result:
102 fi
103 if (( $status != 0 )); then
104 err 5 "Write error($status) occurred cmd: \"$1 > $PGDEV\""
105 fi
106}
107
108## -- General shell tricks --
109
110function root_check_run_with_sudo() {
111 # Trick so, program can be run as normal user, will just use "sudo"
112 # call as root_check_run_as_sudo "$@"
113 if [ "$EUID" -ne 0 ]; then
114 if [ -x $0 ]; then # Directly executable use sudo
115 info "Not root, running with sudo"
116 sudo "$0" "$@"
117 exit $?
118 fi
119 err 4 "cannot perform sudo run of $0"
120 fi
121}