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Commit | Line | Data |
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1dc01b9f DM |
1 | package PVE::Storage::ISCSIPlugin; |
2 | ||
3 | use strict; | |
4 | use warnings; | |
5 | use File::stat; | |
6 | use IO::Dir; | |
7 | use IO::File; | |
8 | use PVE::Tools qw(run_command file_read_firstline trim dir_glob_regex dir_glob_foreach); | |
9 | use PVE::Storage::Plugin; | |
10 | use PVE::JSONSchema qw(get_standard_option); | |
11 | use Net::Ping; | |
12 | ||
13 | use base qw(PVE::Storage::Plugin); | |
14 | ||
15 | # iscsi helper function | |
16 | ||
17 | my $ISCSIADM = '/usr/bin/iscsiadm'; | |
18 | $ISCSIADM = undef if ! -X $ISCSIADM; | |
19 | ||
20 | sub check_iscsi_support { | |
21 | my $noerr = shift; | |
22 | ||
23 | if (!$ISCSIADM) { | |
24 | my $msg = "no iscsi support - please install open-iscsi"; | |
25 | if ($noerr) { | |
26 | warn "warning: $msg\n"; | |
27 | return 0; | |
28 | } | |
29 | ||
30 | die "error: $msg\n"; | |
31 | } | |
32 | ||
33 | return 1; | |
34 | } | |
35 | ||
36 | sub iscsi_session_list { | |
37 | ||
38 | check_iscsi_support (); | |
39 | ||
40 | my $cmd = [$ISCSIADM, '--mode', 'session']; | |
41 | ||
42 | my $res = {}; | |
43 | ||
7acee37a DM |
44 | eval { |
45 | run_command($cmd, errmsg => 'iscsi session scan failed', outfunc => sub { | |
46 | my $line = shift; | |
47 | ||
48 | if ($line =~ m/^tcp:\s+\[(\S+)\]\s+\S+\s+(\S+)\s*$/) { | |
49 | my ($session, $target) = ($1, $2); | |
50 | # there can be several sessions per target (multipath) | |
51 | push @{$res->{$target}}, $session; | |
52 | } | |
53 | }); | |
54 | }; | |
55 | if (my $err = $@) { | |
56 | die $err if $err !~ m/: No active sessions.$/i; | |
57 | } | |
1dc01b9f DM |
58 | |
59 | return $res; | |
60 | } | |
61 | ||
62 | sub iscsi_test_portal { | |
63 | my ($portal) = @_; | |
64 | ||
65 | my ($server, $port) = split(':', $portal); | |
66 | my $p = Net::Ping->new("tcp", 2); | |
67 | $p->port_number($port || 3260); | |
68 | return $p->ping($server); | |
69 | } | |
70 | ||
71 | sub iscsi_discovery { | |
72 | my ($portal) = @_; | |
73 | ||
74 | check_iscsi_support (); | |
75 | ||
76 | my $cmd = [$ISCSIADM, '--mode', 'discovery', '--type', 'sendtargets', | |
77 | '--portal', $portal]; | |
78 | ||
79 | my $res = {}; | |
80 | ||
81 | return $res if !iscsi_test_portal($portal); # fixme: raise exception here? | |
82 | ||
83 | run_command($cmd, outfunc => sub { | |
84 | my $line = shift; | |
85 | ||
86 | if ($line =~ m/^(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}:\d+)\,\S+\s+(\S+)\s*$/) { | |
87 | my $portal = $1; | |
88 | my $target = $2; | |
89 | # one target can have more than one portal (multipath). | |
90 | push @{$res->{$target}}, $portal; | |
91 | } | |
92 | }); | |
93 | ||
94 | return $res; | |
95 | } | |
96 | ||
97 | sub iscsi_login { | |
98 | my ($target, $portal_in) = @_; | |
99 | ||
100 | check_iscsi_support (); | |
101 | ||
102 | eval { iscsi_discovery ($portal_in); }; | |
103 | warn $@ if $@; | |
104 | ||
105 | my $cmd = [$ISCSIADM, '--mode', 'node', '--targetname', $target, '--login']; | |
106 | run_command($cmd); | |
107 | } | |
108 | ||
109 | sub iscsi_logout { | |
110 | my ($target, $portal) = @_; | |
111 | ||
112 | check_iscsi_support (); | |
113 | ||
114 | my $cmd = [$ISCSIADM, '--mode', 'node', '--targetname', $target, '--logout']; | |
115 | run_command($cmd); | |
116 | } | |
117 | ||
118 | my $rescan_filename = "/var/run/pve-iscsi-rescan.lock"; | |
119 | ||
120 | sub iscsi_session_rescan { | |
121 | my $session_list = shift; | |
122 | ||
123 | check_iscsi_support(); | |
124 | ||
125 | my $rstat = stat($rescan_filename); | |
126 | ||
127 | if (!$rstat) { | |
128 | if (my $fh = IO::File->new($rescan_filename, "a")) { | |
129 | utime undef, undef, $fh; | |
130 | close($fh); | |
131 | } | |
132 | } else { | |
133 | my $atime = $rstat->atime; | |
134 | my $tdiff = time() - $atime; | |
135 | # avoid frequent rescans | |
136 | return if !($tdiff < 0 || $tdiff > 10); | |
137 | utime undef, undef, $rescan_filename; | |
138 | } | |
139 | ||
140 | foreach my $session (@$session_list) { | |
141 | my $cmd = [$ISCSIADM, '--mode', 'session', '-r', $session, '-R']; | |
142 | eval { run_command($cmd, outfunc => sub {}); }; | |
143 | warn $@ if $@; | |
144 | } | |
145 | } | |
146 | ||
147 | sub load_stable_scsi_paths { | |
148 | ||
149 | my $stable_paths = {}; | |
150 | ||
151 | my $stabledir = "/dev/disk/by-id"; | |
152 | ||
153 | if (my $dh = IO::Dir->new($stabledir)) { | |
154 | while (defined(my $tmp = $dh->read)) { | |
155 | # exclude filenames with part in name (same disk but partitions) | |
156 | # use only filenames with scsi(with multipath i have the same device | |
157 | # with dm-uuid-mpath , dm-name and scsi in name) | |
158 | if($tmp !~ m/-part\d+$/ && $tmp =~ m/^scsi-/) { | |
159 | my $path = "$stabledir/$tmp"; | |
160 | my $bdevdest = readlink($path); | |
161 | if ($bdevdest && $bdevdest =~ m|^../../([^/]+)|) { | |
162 | $stable_paths->{$1}=$tmp; | |
163 | } | |
164 | } | |
165 | } | |
166 | $dh->close; | |
167 | } | |
168 | return $stable_paths; | |
169 | } | |
170 | ||
171 | sub iscsi_device_list { | |
172 | ||
173 | my $res = {}; | |
174 | ||
175 | my $dirname = '/sys/class/iscsi_session'; | |
176 | ||
177 | my $stable_paths = load_stable_scsi_paths(); | |
178 | ||
179 | dir_glob_foreach($dirname, 'session(\d+)', sub { | |
180 | my ($ent, $session) = @_; | |
181 | ||
182 | my $target = file_read_firstline("$dirname/$ent/targetname"); | |
183 | return if !$target; | |
184 | ||
185 | my (undef, $host) = dir_glob_regex("$dirname/$ent/device", 'target(\d+):.*'); | |
186 | return if !defined($host); | |
187 | ||
188 | dir_glob_foreach("/sys/bus/scsi/devices", "$host:" . '(\d+):(\d+):(\d+)', sub { | |
189 | my ($tmp, $channel, $id, $lun) = @_; | |
190 | ||
191 | my $type = file_read_firstline("/sys/bus/scsi/devices/$tmp/type"); | |
192 | return if !defined($type) || $type ne '0'; # list disks only | |
193 | ||
194 | my $bdev; | |
195 | if (-d "/sys/bus/scsi/devices/$tmp/block") { # newer kernels | |
196 | (undef, $bdev) = dir_glob_regex("/sys/bus/scsi/devices/$tmp/block/", '([A-Za-z]\S*)'); | |
197 | } else { | |
198 | (undef, $bdev) = dir_glob_regex("/sys/bus/scsi/devices/$tmp", 'block:(\S+)'); | |
199 | } | |
200 | return if !$bdev; | |
201 | ||
202 | #check multipath | |
203 | if (-d "/sys/block/$bdev/holders") { | |
204 | my $multipathdev = dir_glob_regex("/sys/block/$bdev/holders", '[A-Za-z]\S*'); | |
205 | $bdev = $multipathdev if $multipathdev; | |
206 | } | |
207 | ||
208 | my $blockdev = $stable_paths->{$bdev}; | |
209 | return if !$blockdev; | |
210 | ||
211 | my $size = file_read_firstline("/sys/block/$bdev/size"); | |
212 | return if !$size; | |
213 | ||
214 | my $volid = "$channel.$id.$lun.$blockdev"; | |
215 | ||
216 | $res->{$target}->{$volid} = { | |
217 | 'format' => 'raw', | |
218 | 'size' => int($size * 512), | |
219 | 'vmid' => 0, # not assigned to any vm | |
220 | 'channel' => int($channel), | |
221 | 'id' => int($id), | |
222 | 'lun' => int($lun), | |
223 | }; | |
224 | ||
225 | #print "TEST: $target $session $host,$bus,$tg,$lun $blockdev\n"; | |
226 | }); | |
227 | ||
228 | }); | |
229 | ||
230 | return $res; | |
231 | } | |
232 | ||
233 | # Configuration | |
234 | ||
235 | sub type { | |
236 | return 'iscsi'; | |
237 | } | |
238 | ||
239 | sub plugindata { | |
240 | return { | |
241 | content => [ {images => 1, none => 1}, { images => 1 }], | |
242 | }; | |
243 | } | |
244 | ||
245 | sub properties { | |
246 | return { | |
247 | target => { | |
248 | description => "iSCSI target.", | |
249 | type => 'string', | |
250 | }, | |
251 | portal => { | |
252 | description => "iSCSI portal (IP or DNS name with optional port).", | |
253 | type => 'string', format => 'pve-storage-portal-dns', | |
254 | }, | |
255 | }; | |
256 | } | |
257 | ||
258 | sub options { | |
259 | return { | |
260 | portal => { fixed => 1 }, | |
261 | target => { fixed => 1 }, | |
262 | nodes => { optional => 1}, | |
263 | disable => { optional => 1}, | |
264 | content => { optional => 1}, | |
265 | }; | |
266 | } | |
267 | ||
268 | # Storage implementation | |
269 | ||
270 | sub parse_volname { | |
271 | my ($class, $volname) = @_; | |
272 | ||
273 | if ($volname =~ m!^\d+\.\d+\.\d+\.(\S+)$!) { | |
7800e84d | 274 | return ('images', $1, undef, undef, undef, undef, 'raw'); |
1dc01b9f DM |
275 | } |
276 | ||
277 | die "unable to parse iscsi volume name '$volname'\n"; | |
278 | } | |
279 | ||
452e3ee7 | 280 | sub filesystem_path { |
1dc01b9f DM |
281 | my ($class, $scfg, $volname) = @_; |
282 | ||
283 | my ($vtype, $name, $vmid) = $class->parse_volname($volname); | |
284 | ||
285 | my $path = "/dev/disk/by-id/$name"; | |
286 | ||
5521b580 | 287 | return wantarray ? ($path, $vmid, $vtype) : $path; |
1dc01b9f DM |
288 | } |
289 | ||
5eab0272 DM |
290 | sub create_base { |
291 | my ($class, $storeid, $scfg, $volname) = @_; | |
292 | ||
293 | die "can't create base images in iscsi storage\n"; | |
294 | } | |
295 | ||
296 | sub clone_image { | |
f236eaf8 | 297 | my ($class, $scfg, $storeid, $volname, $vmid, $snap) = @_; |
5eab0272 DM |
298 | |
299 | die "can't clone images in iscsi storage\n"; | |
300 | } | |
301 | ||
1dc01b9f DM |
302 | sub alloc_image { |
303 | my ($class, $storeid, $scfg, $vmid, $fmt, $name, $size) = @_; | |
304 | ||
305 | die "can't allocate space in iscsi storage\n"; | |
306 | } | |
307 | ||
308 | sub free_image { | |
32437ed2 | 309 | my ($class, $storeid, $scfg, $volname, $isBase) = @_; |
1dc01b9f DM |
310 | |
311 | die "can't free space in iscsi storage\n"; | |
312 | } | |
313 | ||
314 | sub list_images { | |
315 | my ($class, $storeid, $scfg, $vmid, $vollist, $cache) = @_; | |
316 | ||
317 | my $res = []; | |
318 | ||
319 | $cache->{iscsi_devices} = iscsi_device_list() if !$cache->{iscsi_devices}; | |
320 | ||
321 | # we have no owner for iscsi devices | |
322 | ||
323 | my $target = $scfg->{target}; | |
324 | ||
325 | if (my $dat = $cache->{iscsi_devices}->{$target}) { | |
326 | ||
327 | foreach my $volname (keys %$dat) { | |
328 | ||
329 | my $volid = "$storeid:$volname"; | |
330 | ||
331 | if ($vollist) { | |
332 | my $found = grep { $_ eq $volid } @$vollist; | |
333 | next if !$found; | |
334 | } else { | |
335 | # we have no owner for iscsi devices | |
336 | next if defined($vmid); | |
337 | } | |
338 | ||
339 | my $info = $dat->{$volname}; | |
340 | $info->{volid} = $volid; | |
341 | ||
342 | push @$res, $info; | |
343 | } | |
344 | } | |
345 | ||
346 | return $res; | |
347 | } | |
348 | ||
349 | sub status { | |
350 | my ($class, $storeid, $scfg, $cache) = @_; | |
351 | ||
352 | $cache->{iscsi_sessions} = iscsi_session_list() if !$cache->{iscsi_sessions}; | |
353 | ||
354 | my $active = defined($cache->{iscsi_sessions}->{$scfg->{target}}); | |
355 | ||
356 | return (0, 0, 0, $active); | |
357 | } | |
358 | ||
359 | sub activate_storage { | |
360 | my ($class, $storeid, $scfg, $cache) = @_; | |
361 | ||
362 | return if !check_iscsi_support(1); | |
363 | ||
364 | $cache->{iscsi_sessions} = iscsi_session_list() if !$cache->{iscsi_sessions}; | |
365 | ||
366 | my $iscsi_sess = $cache->{iscsi_sessions}->{$scfg->{target}}; | |
367 | if (!defined ($iscsi_sess)) { | |
368 | eval { iscsi_login($scfg->{target}, $scfg->{portal}); }; | |
369 | warn $@ if $@; | |
370 | } else { | |
371 | # make sure we get all devices | |
372 | iscsi_session_rescan($iscsi_sess); | |
373 | } | |
374 | } | |
375 | ||
376 | sub deactivate_storage { | |
377 | my ($class, $storeid, $scfg, $cache) = @_; | |
378 | ||
379 | return if !check_iscsi_support(1); | |
380 | ||
381 | $cache->{iscsi_sessions} = iscsi_session_list() if !$cache->{iscsi_sessions}; | |
382 | ||
383 | my $iscsi_sess = $cache->{iscsi_sessions}->{$scfg->{target}}; | |
384 | ||
385 | if (defined ($iscsi_sess)) { | |
386 | iscsi_logout($scfg->{target}, $scfg->{portal}); | |
387 | } | |
388 | } | |
389 | ||
03b5bfdf AD |
390 | sub check_connection { |
391 | my ($class, $storeid, $scfg) = @_; | |
392 | ||
393 | my $portal = $scfg->{portal}; | |
394 | return iscsi_test_portal($portal); | |
395 | } | |
396 | ||
0244a7b9 AD |
397 | sub volume_resize { |
398 | my ($class, $scfg, $storeid, $volname, $size, $running) = @_; | |
399 | die "volume resize is not possible on iscsi device"; | |
400 | } | |
401 | ||
852a55f7 AD |
402 | sub volume_has_feature { |
403 | my ($class, $scfg, $feature, $storeid, $volname, $snapname, $running) = @_; | |
404 | ||
7e8c6888 AD |
405 | my $features = { |
406 | copy => { current => 1}, | |
407 | }; | |
408 | ||
409 | my ($vtype, $name, $vmid, $basename, $basevmid, $isBase) = | |
410 | $class->parse_volname($volname); | |
411 | ||
412 | my $key = undef; | |
413 | if($snapname){ | |
2c5a7097 | 414 | $key = 'snap'; |
7e8c6888 AD |
415 | }else{ |
416 | $key = $isBase ? 'base' : 'current'; | |
417 | } | |
418 | return 1 if $features->{$feature}->{$key}; | |
419 | ||
852a55f7 AD |
420 | return undef; |
421 | } | |
422 | ||
a548fd48 | 423 | |
1dc01b9f | 424 | 1; |