]>
Commit | Line | Data |
---|---|---|
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; | |
1689e627 | 8 | use PVE::Tools qw(run_command file_read_firstline trim dir_glob_regex dir_glob_foreach $IPV4RE $IPV6RE); |
1dc01b9f DM |
9 | use PVE::Storage::Plugin; |
10 | use PVE::JSONSchema qw(get_standard_option); | |
1dc01b9f DM |
11 | |
12 | use base qw(PVE::Storage::Plugin); | |
13 | ||
14 | # iscsi helper function | |
15 | ||
16 | my $ISCSIADM = '/usr/bin/iscsiadm'; | |
17 | $ISCSIADM = undef if ! -X $ISCSIADM; | |
18 | ||
19 | sub check_iscsi_support { | |
20 | my $noerr = shift; | |
21 | ||
22 | if (!$ISCSIADM) { | |
23 | my $msg = "no iscsi support - please install open-iscsi"; | |
24 | if ($noerr) { | |
25 | warn "warning: $msg\n"; | |
26 | return 0; | |
27 | } | |
28 | ||
29 | die "error: $msg\n"; | |
30 | } | |
31 | ||
32 | return 1; | |
33 | } | |
34 | ||
35 | sub iscsi_session_list { | |
36 | ||
37 | check_iscsi_support (); | |
38 | ||
39 | my $cmd = [$ISCSIADM, '--mode', 'session']; | |
40 | ||
41 | my $res = {}; | |
42 | ||
7acee37a DM |
43 | eval { |
44 | run_command($cmd, errmsg => 'iscsi session scan failed', outfunc => sub { | |
45 | my $line = shift; | |
46 | ||
bb3fc38b | 47 | if ($line =~ m/^tcp:\s+\[(\S+)\]\s+\S+\s+(\S+)(\s+\S+)?\s*$/) { |
7acee37a DM |
48 | my ($session, $target) = ($1, $2); |
49 | # there can be several sessions per target (multipath) | |
50 | push @{$res->{$target}}, $session; | |
51 | } | |
52 | }); | |
53 | }; | |
54 | if (my $err = $@) { | |
55 | die $err if $err !~ m/: No active sessions.$/i; | |
56 | } | |
1dc01b9f DM |
57 | |
58 | return $res; | |
59 | } | |
60 | ||
61 | sub iscsi_test_portal { | |
62 | my ($portal) = @_; | |
63 | ||
1689e627 WB |
64 | my ($server, $port) = PVE::Tools::parse_host_and_port($portal); |
65 | return 0 if !$server; | |
66 | return PVE::Network::tcp_ping($server, $port || 3260, 2); | |
1dc01b9f DM |
67 | } |
68 | ||
69 | sub iscsi_discovery { | |
70 | my ($portal) = @_; | |
71 | ||
72 | check_iscsi_support (); | |
73 | ||
74 | my $cmd = [$ISCSIADM, '--mode', 'discovery', '--type', 'sendtargets', | |
75 | '--portal', $portal]; | |
76 | ||
77 | my $res = {}; | |
78 | ||
79 | return $res if !iscsi_test_portal($portal); # fixme: raise exception here? | |
80 | ||
81 | run_command($cmd, outfunc => sub { | |
82 | my $line = shift; | |
83 | ||
1689e627 | 84 | if ($line =~ m/^((?:$IPV4RE|\[$IPV6RE\]):\d+)\,\S+\s+(\S+)\s*$/) { |
1dc01b9f DM |
85 | my $portal = $1; |
86 | my $target = $2; | |
87 | # one target can have more than one portal (multipath). | |
88 | push @{$res->{$target}}, $portal; | |
89 | } | |
90 | }); | |
91 | ||
92 | return $res; | |
93 | } | |
94 | ||
95 | sub iscsi_login { | |
96 | my ($target, $portal_in) = @_; | |
97 | ||
98 | check_iscsi_support (); | |
99 | ||
100 | eval { iscsi_discovery ($portal_in); }; | |
101 | warn $@ if $@; | |
102 | ||
103 | my $cmd = [$ISCSIADM, '--mode', 'node', '--targetname', $target, '--login']; | |
104 | run_command($cmd); | |
105 | } | |
106 | ||
107 | sub iscsi_logout { | |
108 | my ($target, $portal) = @_; | |
109 | ||
110 | check_iscsi_support (); | |
111 | ||
112 | my $cmd = [$ISCSIADM, '--mode', 'node', '--targetname', $target, '--logout']; | |
113 | run_command($cmd); | |
114 | } | |
115 | ||
116 | my $rescan_filename = "/var/run/pve-iscsi-rescan.lock"; | |
117 | ||
118 | sub iscsi_session_rescan { | |
119 | my $session_list = shift; | |
120 | ||
121 | check_iscsi_support(); | |
122 | ||
123 | my $rstat = stat($rescan_filename); | |
124 | ||
125 | if (!$rstat) { | |
126 | if (my $fh = IO::File->new($rescan_filename, "a")) { | |
127 | utime undef, undef, $fh; | |
128 | close($fh); | |
129 | } | |
130 | } else { | |
131 | my $atime = $rstat->atime; | |
132 | my $tdiff = time() - $atime; | |
133 | # avoid frequent rescans | |
134 | return if !($tdiff < 0 || $tdiff > 10); | |
135 | utime undef, undef, $rescan_filename; | |
136 | } | |
137 | ||
138 | foreach my $session (@$session_list) { | |
6b4acdb4 | 139 | my $cmd = [$ISCSIADM, '--mode', 'session', '--sid', $session, '--rescan']; |
1dc01b9f DM |
140 | eval { run_command($cmd, outfunc => sub {}); }; |
141 | warn $@ if $@; | |
142 | } | |
143 | } | |
144 | ||
145 | sub load_stable_scsi_paths { | |
146 | ||
147 | my $stable_paths = {}; | |
148 | ||
149 | my $stabledir = "/dev/disk/by-id"; | |
150 | ||
151 | if (my $dh = IO::Dir->new($stabledir)) { | |
152 | while (defined(my $tmp = $dh->read)) { | |
153 | # exclude filenames with part in name (same disk but partitions) | |
154 | # use only filenames with scsi(with multipath i have the same device | |
155 | # with dm-uuid-mpath , dm-name and scsi in name) | |
156 | if($tmp !~ m/-part\d+$/ && $tmp =~ m/^scsi-/) { | |
157 | my $path = "$stabledir/$tmp"; | |
158 | my $bdevdest = readlink($path); | |
159 | if ($bdevdest && $bdevdest =~ m|^../../([^/]+)|) { | |
160 | $stable_paths->{$1}=$tmp; | |
161 | } | |
162 | } | |
163 | } | |
164 | $dh->close; | |
165 | } | |
166 | return $stable_paths; | |
167 | } | |
168 | ||
169 | sub iscsi_device_list { | |
170 | ||
171 | my $res = {}; | |
172 | ||
173 | my $dirname = '/sys/class/iscsi_session'; | |
174 | ||
175 | my $stable_paths = load_stable_scsi_paths(); | |
176 | ||
177 | dir_glob_foreach($dirname, 'session(\d+)', sub { | |
178 | my ($ent, $session) = @_; | |
179 | ||
180 | my $target = file_read_firstline("$dirname/$ent/targetname"); | |
181 | return if !$target; | |
182 | ||
183 | my (undef, $host) = dir_glob_regex("$dirname/$ent/device", 'target(\d+):.*'); | |
184 | return if !defined($host); | |
185 | ||
186 | dir_glob_foreach("/sys/bus/scsi/devices", "$host:" . '(\d+):(\d+):(\d+)', sub { | |
187 | my ($tmp, $channel, $id, $lun) = @_; | |
188 | ||
189 | my $type = file_read_firstline("/sys/bus/scsi/devices/$tmp/type"); | |
190 | return if !defined($type) || $type ne '0'; # list disks only | |
191 | ||
192 | my $bdev; | |
193 | if (-d "/sys/bus/scsi/devices/$tmp/block") { # newer kernels | |
194 | (undef, $bdev) = dir_glob_regex("/sys/bus/scsi/devices/$tmp/block/", '([A-Za-z]\S*)'); | |
195 | } else { | |
196 | (undef, $bdev) = dir_glob_regex("/sys/bus/scsi/devices/$tmp", 'block:(\S+)'); | |
197 | } | |
198 | return if !$bdev; | |
199 | ||
200 | #check multipath | |
201 | if (-d "/sys/block/$bdev/holders") { | |
202 | my $multipathdev = dir_glob_regex("/sys/block/$bdev/holders", '[A-Za-z]\S*'); | |
203 | $bdev = $multipathdev if $multipathdev; | |
204 | } | |
205 | ||
206 | my $blockdev = $stable_paths->{$bdev}; | |
207 | return if !$blockdev; | |
208 | ||
209 | my $size = file_read_firstline("/sys/block/$bdev/size"); | |
210 | return if !$size; | |
211 | ||
212 | my $volid = "$channel.$id.$lun.$blockdev"; | |
213 | ||
214 | $res->{$target}->{$volid} = { | |
215 | 'format' => 'raw', | |
216 | 'size' => int($size * 512), | |
217 | 'vmid' => 0, # not assigned to any vm | |
218 | 'channel' => int($channel), | |
219 | 'id' => int($id), | |
220 | 'lun' => int($lun), | |
221 | }; | |
222 | ||
223 | #print "TEST: $target $session $host,$bus,$tg,$lun $blockdev\n"; | |
224 | }); | |
225 | ||
226 | }); | |
227 | ||
228 | return $res; | |
229 | } | |
230 | ||
231 | # Configuration | |
232 | ||
233 | sub type { | |
234 | return 'iscsi'; | |
235 | } | |
236 | ||
237 | sub plugindata { | |
238 | return { | |
239 | content => [ {images => 1, none => 1}, { images => 1 }], | |
5da48ca6 | 240 | select_existing => 1, |
1dc01b9f DM |
241 | }; |
242 | } | |
243 | ||
244 | sub properties { | |
245 | return { | |
246 | target => { | |
247 | description => "iSCSI target.", | |
248 | type => 'string', | |
249 | }, | |
250 | portal => { | |
251 | description => "iSCSI portal (IP or DNS name with optional port).", | |
252 | type => 'string', format => 'pve-storage-portal-dns', | |
253 | }, | |
254 | }; | |
255 | } | |
256 | ||
257 | sub options { | |
258 | return { | |
259 | portal => { fixed => 1 }, | |
260 | target => { fixed => 1 }, | |
261 | nodes => { optional => 1}, | |
262 | disable => { optional => 1}, | |
263 | content => { optional => 1}, | |
264 | }; | |
265 | } | |
266 | ||
267 | # Storage implementation | |
268 | ||
269 | sub parse_volname { | |
270 | my ($class, $volname) = @_; | |
271 | ||
272 | if ($volname =~ m!^\d+\.\d+\.\d+\.(\S+)$!) { | |
7800e84d | 273 | return ('images', $1, undef, undef, undef, undef, 'raw'); |
1dc01b9f DM |
274 | } |
275 | ||
276 | die "unable to parse iscsi volume name '$volname'\n"; | |
277 | } | |
278 | ||
452e3ee7 | 279 | sub filesystem_path { |
e67069eb DM |
280 | my ($class, $scfg, $volname, $snapname) = @_; |
281 | ||
282 | die "snapshot is not possible on iscsi storage\n" if defined($snapname); | |
1dc01b9f DM |
283 | |
284 | my ($vtype, $name, $vmid) = $class->parse_volname($volname); | |
285 | ||
286 | my $path = "/dev/disk/by-id/$name"; | |
287 | ||
5521b580 | 288 | return wantarray ? ($path, $vmid, $vtype) : $path; |
1dc01b9f DM |
289 | } |
290 | ||
5eab0272 DM |
291 | sub create_base { |
292 | my ($class, $storeid, $scfg, $volname) = @_; | |
293 | ||
294 | die "can't create base images in iscsi storage\n"; | |
295 | } | |
296 | ||
297 | sub clone_image { | |
f236eaf8 | 298 | my ($class, $scfg, $storeid, $volname, $vmid, $snap) = @_; |
5eab0272 DM |
299 | |
300 | die "can't clone images in iscsi storage\n"; | |
301 | } | |
302 | ||
1dc01b9f DM |
303 | sub alloc_image { |
304 | my ($class, $storeid, $scfg, $vmid, $fmt, $name, $size) = @_; | |
305 | ||
306 | die "can't allocate space in iscsi storage\n"; | |
307 | } | |
308 | ||
309 | sub free_image { | |
32437ed2 | 310 | my ($class, $storeid, $scfg, $volname, $isBase) = @_; |
1dc01b9f DM |
311 | |
312 | die "can't free space in iscsi storage\n"; | |
313 | } | |
314 | ||
315 | sub list_images { | |
316 | my ($class, $storeid, $scfg, $vmid, $vollist, $cache) = @_; | |
317 | ||
318 | my $res = []; | |
319 | ||
320 | $cache->{iscsi_devices} = iscsi_device_list() if !$cache->{iscsi_devices}; | |
321 | ||
322 | # we have no owner for iscsi devices | |
323 | ||
324 | my $target = $scfg->{target}; | |
325 | ||
326 | if (my $dat = $cache->{iscsi_devices}->{$target}) { | |
327 | ||
328 | foreach my $volname (keys %$dat) { | |
329 | ||
330 | my $volid = "$storeid:$volname"; | |
331 | ||
332 | if ($vollist) { | |
333 | my $found = grep { $_ eq $volid } @$vollist; | |
334 | next if !$found; | |
335 | } else { | |
336 | # we have no owner for iscsi devices | |
337 | next if defined($vmid); | |
338 | } | |
339 | ||
340 | my $info = $dat->{$volname}; | |
341 | $info->{volid} = $volid; | |
342 | ||
343 | push @$res, $info; | |
344 | } | |
345 | } | |
346 | ||
347 | return $res; | |
348 | } | |
349 | ||
350 | sub status { | |
351 | my ($class, $storeid, $scfg, $cache) = @_; | |
352 | ||
353 | $cache->{iscsi_sessions} = iscsi_session_list() if !$cache->{iscsi_sessions}; | |
354 | ||
355 | my $active = defined($cache->{iscsi_sessions}->{$scfg->{target}}); | |
356 | ||
357 | return (0, 0, 0, $active); | |
358 | } | |
359 | ||
360 | sub activate_storage { | |
361 | my ($class, $storeid, $scfg, $cache) = @_; | |
362 | ||
363 | return if !check_iscsi_support(1); | |
364 | ||
365 | $cache->{iscsi_sessions} = iscsi_session_list() if !$cache->{iscsi_sessions}; | |
366 | ||
367 | my $iscsi_sess = $cache->{iscsi_sessions}->{$scfg->{target}}; | |
368 | if (!defined ($iscsi_sess)) { | |
369 | eval { iscsi_login($scfg->{target}, $scfg->{portal}); }; | |
370 | warn $@ if $@; | |
371 | } else { | |
372 | # make sure we get all devices | |
373 | iscsi_session_rescan($iscsi_sess); | |
374 | } | |
375 | } | |
376 | ||
377 | sub deactivate_storage { | |
378 | my ($class, $storeid, $scfg, $cache) = @_; | |
379 | ||
380 | return if !check_iscsi_support(1); | |
381 | ||
382 | $cache->{iscsi_sessions} = iscsi_session_list() if !$cache->{iscsi_sessions}; | |
383 | ||
384 | my $iscsi_sess = $cache->{iscsi_sessions}->{$scfg->{target}}; | |
385 | ||
386 | if (defined ($iscsi_sess)) { | |
387 | iscsi_logout($scfg->{target}, $scfg->{portal}); | |
388 | } | |
389 | } | |
390 | ||
03b5bfdf AD |
391 | sub check_connection { |
392 | my ($class, $storeid, $scfg) = @_; | |
393 | ||
394 | my $portal = $scfg->{portal}; | |
395 | return iscsi_test_portal($portal); | |
396 | } | |
397 | ||
0244a7b9 AD |
398 | sub volume_resize { |
399 | my ($class, $scfg, $storeid, $volname, $size, $running) = @_; | |
400 | die "volume resize is not possible on iscsi device"; | |
401 | } | |
402 | ||
852a55f7 AD |
403 | sub volume_has_feature { |
404 | my ($class, $scfg, $feature, $storeid, $volname, $snapname, $running) = @_; | |
405 | ||
7e8c6888 AD |
406 | my $features = { |
407 | copy => { current => 1}, | |
408 | }; | |
409 | ||
410 | my ($vtype, $name, $vmid, $basename, $basevmid, $isBase) = | |
411 | $class->parse_volname($volname); | |
412 | ||
413 | my $key = undef; | |
414 | if($snapname){ | |
2c5a7097 | 415 | $key = 'snap'; |
7e8c6888 AD |
416 | }else{ |
417 | $key = $isBase ? 'base' : 'current'; | |
418 | } | |
419 | return 1 if $features->{$feature}->{$key}; | |
420 | ||
852a55f7 AD |
421 | return undef; |
422 | } | |
423 | ||
a548fd48 | 424 | |
1dc01b9f | 425 | 1; |