avoid Exporter warning
[pve-common.git] / src / PVE / ProcFSTools.pm
1 package PVE::ProcFSTools;
2
3 use strict;
4 use warnings;
5 use POSIX;
6 use Time::HiRes qw (gettimeofday);
7 use IO::File;
8 use PVE::Tools;
9 use Cwd qw();
10
11 my $clock_ticks = POSIX::sysconf(&POSIX::_SC_CLK_TCK);
12
13 my $cpuinfo;
14
15 sub read_cpuinfo {
16 my $fn = '/proc/cpuinfo';
17
18 return $cpuinfo if $cpuinfo;
19
20 my $res = {
21 user_hz => $clock_ticks,
22 model => 'unknown',
23 mhz => 0,
24 cpus => 1,
25 sockets => 1,
26 };
27
28 my $fh = IO::File->new ($fn, "r");
29 return $res if !$fh;
30
31 my $idhash = {};
32 my $count = 0;
33 while (defined(my $line = <$fh>)) {
34 if ($line =~ m/^processor\s*:\s*\d+\s*$/i) {
35 $count++;
36 } elsif ($line =~ m/^model\s+name\s*:\s*(.*)\s*$/i) {
37 $res->{model} = $1 if $res->{model} eq 'unknown';
38 } elsif ($line =~ m/^cpu\s+MHz\s*:\s*(\d+\.\d+)\s*$/i) {
39 $res->{mhz} = $1 if !$res->{mhz};
40 } elsif ($line =~ m/^flags\s*:.*(vmx|svm)/) {
41 $res->{hvm} = 1; # Hardware Virtual Machine (Intel VT / AMD-V)
42 } elsif ($line =~ m/^physical id\s*:\s*(\d+)\s*$/i) {
43 $idhash->{$1} = 1;
44 }
45 }
46
47 $res->{sockets} = scalar(keys %$idhash) || 1;
48
49 $res->{cpus} = $count;
50
51 $fh->close;
52
53 $cpuinfo = $res;
54
55 return $res;
56 }
57
58 sub read_proc_uptime {
59 my $ticks = shift;
60
61 my $line = PVE::Tools::file_read_firstline("/proc/uptime");
62 if ($line && $line =~ m|^(\d+\.\d+)\s+(\d+\.\d+)\s*$|) {
63 if ($ticks) {
64 return (int($1*$clock_ticks), int($2*$clock_ticks));
65 } else {
66 return (int($1), int($2));
67 }
68 }
69
70 return (0, 0);
71 }
72
73 sub read_loadavg {
74
75 my $line = PVE::Tools::file_read_firstline('/proc/loadavg');
76
77 if ($line =~ m|^(\d+\.\d+)\s+(\d+\.\d+)\s+(\d+\.\d+)\s+\d+/\d+\s+\d+\s*$|) {
78 return wantarray ? ($1, $2, $3) : $1;
79 }
80
81 return wantarray ? (0, 0, 0) : 0;
82 }
83
84 my $last_proc_stat;
85
86 sub read_proc_stat {
87 my $res = { user => 0, nice => 0, system => 0, idle => 0 , sum => 0};
88
89 my $cpucount = 0;
90
91 if (my $fh = IO::File->new ("/proc/stat", "r")) {
92 while (defined (my $line = <$fh>)) {
93 if ($line =~ m|^cpu\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s|) {
94 $res->{user} = $1;
95 $res->{nice} = $2;
96 $res->{system} = $3;
97 $res->{idle} = $4;
98 $res->{used} = $1+$2+$3;
99 $res->{iowait} = $5;
100 } elsif ($line =~ m|^cpu\d+\s|) {
101 $cpucount++;
102 }
103 }
104 $fh->close;
105 }
106
107 $cpucount = 1 if !$cpucount;
108
109 my $ctime = gettimeofday; # floating point time in seconds
110
111 $res->{ctime} = $ctime;
112 $res->{cpu} = 0;
113 $res->{wait} = 0;
114
115 $last_proc_stat = $res if !$last_proc_stat;
116
117 my $diff = ($ctime - $last_proc_stat->{ctime}) * $clock_ticks * $cpucount;
118
119 if ($diff > 1000) { # don't update too often
120 my $useddiff = $res->{used} - $last_proc_stat->{used};
121 $useddiff = $diff if $useddiff > $diff;
122 $res->{cpu} = $useddiff/$diff;
123 my $waitdiff = $res->{iowait} - $last_proc_stat->{iowait};
124 $waitdiff = $diff if $waitdiff > $diff;
125 $res->{wait} = $waitdiff/$diff;
126 $last_proc_stat = $res;
127 } else {
128 $res->{cpu} = $last_proc_stat->{cpu};
129 $res->{wait} = $last_proc_stat->{wait};
130 }
131
132 return $res;
133 }
134
135 sub read_proc_pid_stat {
136 my $pid = shift;
137
138 my $statstr = PVE::Tools::file_read_firstline("/proc/$pid/stat");
139
140 if ($statstr && $statstr =~ m/^$pid \(.*\) (\S) (-?\d+) -?\d+ -?\d+ -?\d+ -?\d+ \d+ \d+ \d+ \d+ \d+ (\d+) (\d+) (-?\d+) (-?\d+) -?\d+ -?\d+ -?\d+ 0 (\d+) (\d+) (-?\d+) \d+ \d+ \d+ \d+ \d+ \d+ \d+ \d+ \d+ \d+ \d+ \d+ \d+ -?\d+ -?\d+ \d+ \d+ \d+/) {
141 return {
142 status => $1,
143 utime => $3,
144 stime => $4,
145 starttime => $7,
146 vsize => $8,
147 rss => $9 * 4096,
148 };
149 }
150
151 return undef;
152 }
153
154 sub check_process_running {
155 my ($pid, $pstart) = @_;
156
157 # note: waitpid only work for child processes, but not
158 # for processes spanned by other processes.
159 # kill(0, pid) return succes for zombies.
160 # So we read the status form /proc/$pid/stat instead
161
162 my $info = read_proc_pid_stat($pid);
163
164 return $info && (!$pstart || ($info->{starttime} eq $pstart)) && ($info->{status} ne 'Z') ? $info : undef;
165 }
166
167 sub read_proc_starttime {
168 my $pid = shift;
169
170 my $info = read_proc_pid_stat($pid);
171 return $info ? $info->{starttime} : 0;
172 }
173
174 sub read_meminfo {
175
176 my $res = {
177 memtotal => 0,
178 memfree => 0,
179 memused => 0,
180 memshared => 0,
181 swaptotal => 0,
182 swapfree => 0,
183 swapused => 0,
184 };
185
186 my $fh = IO::File->new ("/proc/meminfo", "r");
187 return $res if !$fh;
188
189 my $d = {};
190 while (my $line = <$fh>) {
191 if ($line =~ m/^(\S+):\s+(\d+)\s*kB/i) {
192 $d->{lc ($1)} = $2 * 1024;
193 }
194 }
195 close($fh);
196
197 $res->{memtotal} = $d->{memtotal};
198 $res->{memfree} = $d->{memfree} + $d->{buffers} + $d->{cached};
199 $res->{memused} = $res->{memtotal} - $res->{memfree};
200
201 $res->{swaptotal} = $d->{swaptotal};
202 $res->{swapfree} = $d->{swapfree};
203 $res->{swapused} = $res->{swaptotal} - $res->{swapfree};
204
205 my $spages = PVE::Tools::file_read_firstline("/sys/kernel/mm/ksm/pages_sharing");
206 $res->{memshared} = int($spages) * 4096;
207
208 return $res;
209 }
210
211 # memory usage of current process
212 sub read_memory_usage {
213
214 my $res = { size => 0, resident => 0, shared => 0 };
215
216 my $ps = 4096;
217
218 my $line = PVE::Tools::file_read_firstline("/proc/$$/statm");
219
220 if ($line =~ m/^(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s*/) {
221 $res->{size} = $1*$ps;
222 $res->{resident} = $2*$ps;
223 $res->{shared} = $3*$ps;
224 }
225
226 return $res;
227 }
228
229 sub read_proc_net_dev {
230
231 my $res = {};
232
233 my $fh = IO::File->new ("/proc/net/dev", "r");
234 return $res if !$fh;
235
236 while (defined (my $line = <$fh>)) {
237 if ($line =~ m/^\s*(.*):\s*(\d+)\s+\d+\s+\d+\s+\d+\s+\d+\s+\d+\s+\d+\s+\d+\s+(\d+)\s+/) {
238 $res->{$1} = {
239 receive => $2,
240 transmit => $3,
241 };
242 }
243 }
244
245 close($fh);
246
247 return $res;
248 }
249
250 sub write_proc_entry {
251 my ($filename, $data) = @_;#
252
253 my $fh = IO::File->new($filename, O_WRONLY);
254 die "unable to open file '$filename' - $!\n" if !$fh;
255 die "unable to write '$filename' - $!\n" unless print $fh $data;
256 die "closing file '$filename' failed - $!\n" unless close $fh;
257 $fh->close();
258 }
259
260 sub read_proc_net_route {
261 my $filename = "/proc/net/route";
262
263 my $res = [];
264
265 my $fh = IO::File->new ($filename, "r");
266 return $res if !$fh;
267
268 my $int_to_quad = sub {
269 return join '.' => map { ($_[0] >> 8*(3-$_)) % 256 } (3, 2, 1, 0);
270 };
271
272 while (defined(my $line = <$fh>)) {
273 next if $line =~/^Iface\s+Destination/; # skip head
274 my ($iface, $dest, $gateway, $metric, $mask, $mtu) = (split(/\s+/, $line))[0,1,2,6,7,8];
275 push @$res, {
276 dest => &$int_to_quad(hex($dest)),
277 gateway => &$int_to_quad(hex($gateway)),
278 mask => &$int_to_quad(hex($mask)),
279 metric => $metric,
280 mtu => $mtu,
281 iface => $iface,
282 };
283 }
284
285 return $res;
286 }
287
288 sub read_proc_mounts {
289 return PVE::Tools::file_get_contents("/proc/mounts");
290 }
291
292 sub is_mounted {
293 my ($mountpoint) = @_;
294
295 $mountpoint = Cwd::realpath($mountpoint);
296
297 my $mountdata = read_proc_mounts();
298
299 if ($mountdata =~ m/\s$mountpoint\s/) {
300 return 1;
301 } else {
302 return 0;
303 }
304 }
305
306 sub read_proc_net_ipv6_route {
307 my $filename = "/proc/net/ipv6_route";
308
309 my $res = [];
310
311 my $fh = IO::File->new ($filename, "r");
312 return $res if !$fh;
313
314 my $read_v6addr = sub { s/....(?!$)/$&:/g };
315
316 # ipv6_route has no header
317 while (defined(my $line = <$fh>)) {
318 my ($dest, $prefix, $nexthop, $metric, $iface) = (split(/\s+/, $line))[0,1,4,5,9];
319 push @$res, {
320 dest => &$read_v6addr($dest),
321 prefix => $prefix,
322 gateway => &$read_v6addr($nexthop),
323 metric => $metric,
324 iface => $iface
325 };
326 }
327
328 return $res;
329 }
330
331 1;