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1 | package PVE::Storage::ISCSIPlugin; | |
2 | ||
3 | use strict; | |
4 | use warnings; | |
5 | ||
6 | use File::stat; | |
7 | use IO::Dir; | |
8 | use IO::File; | |
9 | ||
10 | use PVE::JSONSchema qw(get_standard_option); | |
11 | use PVE::Storage::Plugin; | |
12 | use PVE::Tools qw(run_command file_read_firstline trim dir_glob_regex dir_glob_foreach $IPV4RE $IPV6RE); | |
13 | ||
14 | use base qw(PVE::Storage::Plugin); | |
15 | ||
16 | # iscsi helper function | |
17 | ||
18 | my $ISCSIADM = '/usr/bin/iscsiadm'; | |
19 | $ISCSIADM = undef if ! -X $ISCSIADM; | |
20 | ||
21 | sub check_iscsi_support { | |
22 | my $noerr = shift; | |
23 | ||
24 | if (!$ISCSIADM) { | |
25 | my $msg = "no iscsi support - please install open-iscsi"; | |
26 | if ($noerr) { | |
27 | warn "warning: $msg\n"; | |
28 | return 0; | |
29 | } | |
30 | ||
31 | die "error: $msg\n"; | |
32 | } | |
33 | ||
34 | return 1; | |
35 | } | |
36 | ||
37 | sub iscsi_session_list { | |
38 | ||
39 | check_iscsi_support (); | |
40 | ||
41 | my $cmd = [$ISCSIADM, '--mode', 'session']; | |
42 | ||
43 | my $res = {}; | |
44 | ||
45 | eval { | |
46 | run_command($cmd, errmsg => 'iscsi session scan failed', outfunc => sub { | |
47 | my $line = shift; | |
48 | ||
49 | if ($line =~ m/^tcp:\s+\[(\S+)\]\s+\S+\s+(\S+)(\s+\S+)?\s*$/) { | |
50 | my ($session, $target) = ($1, $2); | |
51 | # there can be several sessions per target (multipath) | |
52 | push @{$res->{$target}}, $session; | |
53 | } | |
54 | }); | |
55 | }; | |
56 | if (my $err = $@) { | |
57 | die $err if $err !~ m/: No active sessions.$/i; | |
58 | } | |
59 | ||
60 | return $res; | |
61 | } | |
62 | ||
63 | sub iscsi_test_portal { | |
64 | my ($portal) = @_; | |
65 | ||
66 | my ($server, $port) = PVE::Tools::parse_host_and_port($portal); | |
67 | return 0 if !$server; | |
68 | return PVE::Network::tcp_ping($server, $port || 3260, 2); | |
69 | } | |
70 | ||
71 | sub iscsi_discovery { | |
72 | my ($portal) = @_; | |
73 | ||
74 | check_iscsi_support (); | |
75 | ||
76 | my $res = {}; | |
77 | return $res if !iscsi_test_portal($portal); # fixme: raise exception here? | |
78 | ||
79 | my $cmd = [$ISCSIADM, '--mode', 'discovery', '--type', 'sendtargets', '--portal', $portal]; | |
80 | run_command($cmd, outfunc => sub { | |
81 | my $line = shift; | |
82 | ||
83 | if ($line =~ m/^((?:$IPV4RE|\[$IPV6RE\]):\d+)\,\S+\s+(\S+)\s*$/) { | |
84 | my $portal = $1; | |
85 | my $target = $2; | |
86 | # one target can have more than one portal (multipath). | |
87 | push @{$res->{$target}}, $portal; | |
88 | } | |
89 | }); | |
90 | ||
91 | return $res; | |
92 | } | |
93 | ||
94 | sub iscsi_login { | |
95 | my ($target, $portal_in) = @_; | |
96 | ||
97 | check_iscsi_support(); | |
98 | ||
99 | eval { iscsi_discovery($portal_in); }; | |
100 | warn $@ if $@; | |
101 | ||
102 | run_command([$ISCSIADM, '--mode', 'node', '--targetname', $target, '--login']); | |
103 | } | |
104 | ||
105 | sub iscsi_logout { | |
106 | my ($target, $portal) = @_; | |
107 | ||
108 | check_iscsi_support(); | |
109 | ||
110 | run_command([$ISCSIADM, '--mode', 'node', '--targetname', $target, '--logout']); | |
111 | } | |
112 | ||
113 | my $rescan_filename = "/var/run/pve-iscsi-rescan.lock"; | |
114 | ||
115 | sub iscsi_session_rescan { | |
116 | my $session_list = shift; | |
117 | ||
118 | check_iscsi_support(); | |
119 | ||
120 | my $rstat = stat($rescan_filename); | |
121 | ||
122 | if (!$rstat) { | |
123 | if (my $fh = IO::File->new($rescan_filename, "a")) { | |
124 | utime undef, undef, $fh; | |
125 | close($fh); | |
126 | } | |
127 | } else { | |
128 | my $atime = $rstat->atime; | |
129 | my $tdiff = time() - $atime; | |
130 | # avoid frequent rescans | |
131 | return if !($tdiff < 0 || $tdiff > 10); | |
132 | utime undef, undef, $rescan_filename; | |
133 | } | |
134 | ||
135 | foreach my $session (@$session_list) { | |
136 | my $cmd = [$ISCSIADM, '--mode', 'session', '--sid', $session, '--rescan']; | |
137 | eval { run_command($cmd, outfunc => sub {}); }; | |
138 | warn $@ if $@; | |
139 | } | |
140 | } | |
141 | ||
142 | sub load_stable_scsi_paths { | |
143 | ||
144 | my $stable_paths = {}; | |
145 | ||
146 | my $stabledir = "/dev/disk/by-id"; | |
147 | ||
148 | if (my $dh = IO::Dir->new($stabledir)) { | |
149 | foreach my $tmp (sort $dh->read) { | |
150 | # exclude filenames with part in name (same disk but partitions) | |
151 | # use only filenames with scsi(with multipath i have the same device | |
152 | # with dm-uuid-mpath , dm-name and scsi in name) | |
153 | if($tmp !~ m/-part\d+$/ && ($tmp =~ m/^scsi-/ || $tmp =~ m/^dm-uuid-mpath-/)) { | |
154 | my $path = "$stabledir/$tmp"; | |
155 | my $bdevdest = readlink($path); | |
156 | if ($bdevdest && $bdevdest =~ m|^../../([^/]+)|) { | |
157 | $stable_paths->{$1}=$tmp; | |
158 | } | |
159 | } | |
160 | } | |
161 | $dh->close; | |
162 | } | |
163 | return $stable_paths; | |
164 | } | |
165 | ||
166 | sub iscsi_device_list { | |
167 | ||
168 | my $res = {}; | |
169 | ||
170 | my $dirname = '/sys/class/iscsi_session'; | |
171 | ||
172 | my $stable_paths = load_stable_scsi_paths(); | |
173 | ||
174 | dir_glob_foreach($dirname, 'session(\d+)', sub { | |
175 | my ($ent, $session) = @_; | |
176 | ||
177 | my $target = file_read_firstline("$dirname/$ent/targetname"); | |
178 | return if !$target; | |
179 | ||
180 | my (undef, $host) = dir_glob_regex("$dirname/$ent/device", 'target(\d+):.*'); | |
181 | return if !defined($host); | |
182 | ||
183 | dir_glob_foreach("/sys/bus/scsi/devices", "$host:" . '(\d+):(\d+):(\d+)', sub { | |
184 | my ($tmp, $channel, $id, $lun) = @_; | |
185 | ||
186 | my $type = file_read_firstline("/sys/bus/scsi/devices/$tmp/type"); | |
187 | return if !defined($type) || $type ne '0'; # list disks only | |
188 | ||
189 | my $bdev; | |
190 | if (-d "/sys/bus/scsi/devices/$tmp/block") { # newer kernels | |
191 | (undef, $bdev) = dir_glob_regex("/sys/bus/scsi/devices/$tmp/block/", '([A-Za-z]\S*)'); | |
192 | } else { | |
193 | (undef, $bdev) = dir_glob_regex("/sys/bus/scsi/devices/$tmp", 'block:(\S+)'); | |
194 | } | |
195 | return if !$bdev; | |
196 | ||
197 | #check multipath | |
198 | if (-d "/sys/block/$bdev/holders") { | |
199 | my $multipathdev = dir_glob_regex("/sys/block/$bdev/holders", '[A-Za-z]\S*'); | |
200 | $bdev = $multipathdev if $multipathdev; | |
201 | } | |
202 | ||
203 | my $blockdev = $stable_paths->{$bdev}; | |
204 | return if !$blockdev; | |
205 | ||
206 | my $size = file_read_firstline("/sys/block/$bdev/size"); | |
207 | return if !$size; | |
208 | ||
209 | my $volid = "$channel.$id.$lun.$blockdev"; | |
210 | ||
211 | $res->{$target}->{$volid} = { | |
212 | 'format' => 'raw', | |
213 | 'size' => int($size * 512), | |
214 | 'vmid' => 0, # not assigned to any vm | |
215 | 'channel' => int($channel), | |
216 | 'id' => int($id), | |
217 | 'lun' => int($lun), | |
218 | }; | |
219 | ||
220 | #print "TEST: $target $session $host,$bus,$tg,$lun $blockdev\n"; | |
221 | }); | |
222 | ||
223 | }); | |
224 | ||
225 | return $res; | |
226 | } | |
227 | ||
228 | # Configuration | |
229 | ||
230 | sub type { | |
231 | return 'iscsi'; | |
232 | } | |
233 | ||
234 | sub plugindata { | |
235 | return { | |
236 | content => [ {images => 1, none => 1}, { images => 1 }], | |
237 | select_existing => 1, | |
238 | }; | |
239 | } | |
240 | ||
241 | sub properties { | |
242 | return { | |
243 | target => { | |
244 | description => "iSCSI target.", | |
245 | type => 'string', | |
246 | }, | |
247 | portal => { | |
248 | description => "iSCSI portal (IP or DNS name with optional port).", | |
249 | type => 'string', format => 'pve-storage-portal-dns', | |
250 | }, | |
251 | }; | |
252 | } | |
253 | ||
254 | sub options { | |
255 | return { | |
256 | portal => { fixed => 1 }, | |
257 | target => { fixed => 1 }, | |
258 | nodes => { optional => 1}, | |
259 | disable => { optional => 1}, | |
260 | content => { optional => 1}, | |
261 | bwlimit => { optional => 1 }, | |
262 | }; | |
263 | } | |
264 | ||
265 | # Storage implementation | |
266 | ||
267 | sub parse_volname { | |
268 | my ($class, $volname) = @_; | |
269 | ||
270 | if ($volname =~ m!^\d+\.\d+\.\d+\.(\S+)$!) { | |
271 | return ('images', $1, undef, undef, undef, undef, 'raw'); | |
272 | } | |
273 | ||
274 | die "unable to parse iscsi volume name '$volname'\n"; | |
275 | } | |
276 | ||
277 | sub filesystem_path { | |
278 | my ($class, $scfg, $volname, $snapname) = @_; | |
279 | ||
280 | die "snapshot is not possible on iscsi storage\n" if defined($snapname); | |
281 | ||
282 | my ($vtype, $name, $vmid) = $class->parse_volname($volname); | |
283 | ||
284 | my $path = "/dev/disk/by-id/$name"; | |
285 | ||
286 | return wantarray ? ($path, $vmid, $vtype) : $path; | |
287 | } | |
288 | ||
289 | sub create_base { | |
290 | my ($class, $storeid, $scfg, $volname) = @_; | |
291 | ||
292 | die "can't create base images in iscsi storage\n"; | |
293 | } | |
294 | ||
295 | sub clone_image { | |
296 | my ($class, $scfg, $storeid, $volname, $vmid, $snap) = @_; | |
297 | ||
298 | die "can't clone images in iscsi storage\n"; | |
299 | } | |
300 | ||
301 | sub alloc_image { | |
302 | my ($class, $storeid, $scfg, $vmid, $fmt, $name, $size) = @_; | |
303 | ||
304 | die "can't allocate space in iscsi storage\n"; | |
305 | } | |
306 | ||
307 | sub free_image { | |
308 | my ($class, $storeid, $scfg, $volname, $isBase) = @_; | |
309 | ||
310 | die "can't free space in iscsi storage\n"; | |
311 | } | |
312 | ||
313 | # list all luns regardless of set content_types, since we need it for | |
314 | # listing in the gui and we can only have images anyway | |
315 | sub list_volumes { | |
316 | my ($class, $storeid, $scfg, $vmid, $content_types) = @_; | |
317 | ||
318 | my $res = $class->list_images($storeid, $scfg, $vmid); | |
319 | ||
320 | for my $item (@$res) { | |
321 | $item->{content} = 'images'; # we only have images | |
322 | } | |
323 | ||
324 | return $res; | |
325 | } | |
326 | ||
327 | sub list_images { | |
328 | my ($class, $storeid, $scfg, $vmid, $vollist, $cache) = @_; | |
329 | ||
330 | my $res = []; | |
331 | ||
332 | $cache->{iscsi_devices} = iscsi_device_list() if !$cache->{iscsi_devices}; | |
333 | ||
334 | # we have no owner for iscsi devices | |
335 | ||
336 | my $target = $scfg->{target}; | |
337 | ||
338 | if (my $dat = $cache->{iscsi_devices}->{$target}) { | |
339 | ||
340 | foreach my $volname (keys %$dat) { | |
341 | ||
342 | my $volid = "$storeid:$volname"; | |
343 | ||
344 | if ($vollist) { | |
345 | my $found = grep { $_ eq $volid } @$vollist; | |
346 | next if !$found; | |
347 | } else { | |
348 | # we have no owner for iscsi devices | |
349 | next if defined($vmid); | |
350 | } | |
351 | ||
352 | my $info = $dat->{$volname}; | |
353 | $info->{volid} = $volid; | |
354 | ||
355 | push @$res, $info; | |
356 | } | |
357 | } | |
358 | ||
359 | return $res; | |
360 | } | |
361 | ||
362 | sub iscsi_session { | |
363 | my ($cache, $target) = @_; | |
364 | $cache->{iscsi_sessions} = iscsi_session_list() if !$cache->{iscsi_sessions}; | |
365 | return $cache->{iscsi_sessions}->{$target}; | |
366 | } | |
367 | ||
368 | sub status { | |
369 | my ($class, $storeid, $scfg, $cache) = @_; | |
370 | ||
371 | my $session = iscsi_session($cache, $scfg->{target}); | |
372 | my $active = defined($session) ? 1 : 0; | |
373 | ||
374 | return (0, 0, 0, $active); | |
375 | } | |
376 | ||
377 | sub activate_storage { | |
378 | my ($class, $storeid, $scfg, $cache) = @_; | |
379 | ||
380 | return if !check_iscsi_support(1); | |
381 | ||
382 | my $session = iscsi_session($cache, $scfg->{target}); | |
383 | ||
384 | if (!defined ($session)) { | |
385 | eval { iscsi_login($scfg->{target}, $scfg->{portal}); }; | |
386 | warn $@ if $@; | |
387 | } else { | |
388 | # make sure we get all devices | |
389 | iscsi_session_rescan($session); | |
390 | } | |
391 | } | |
392 | ||
393 | sub deactivate_storage { | |
394 | my ($class, $storeid, $scfg, $cache) = @_; | |
395 | ||
396 | return if !check_iscsi_support(1); | |
397 | ||
398 | if (defined(iscsi_session($cache, $scfg->{target}))) { | |
399 | iscsi_logout($scfg->{target}, $scfg->{portal}); | |
400 | } | |
401 | } | |
402 | ||
403 | sub check_connection { | |
404 | my ($class, $storeid, $scfg) = @_; | |
405 | ||
406 | my $portal = $scfg->{portal}; | |
407 | return iscsi_test_portal($portal); | |
408 | } | |
409 | ||
410 | sub volume_resize { | |
411 | my ($class, $scfg, $storeid, $volname, $size, $running) = @_; | |
412 | die "volume resize is not possible on iscsi device"; | |
413 | } | |
414 | ||
415 | sub volume_has_feature { | |
416 | my ($class, $scfg, $feature, $storeid, $volname, $snapname, $running) = @_; | |
417 | ||
418 | my $features = { | |
419 | copy => { current => 1}, | |
420 | }; | |
421 | ||
422 | my ($vtype, $name, $vmid, $basename, $basevmid, $isBase) = | |
423 | $class->parse_volname($volname); | |
424 | ||
425 | my $key = undef; | |
426 | if($snapname){ | |
427 | $key = 'snap'; | |
428 | }else{ | |
429 | $key = $isBase ? 'base' : 'current'; | |
430 | } | |
431 | return 1 if $features->{$feature}->{$key}; | |
432 | ||
433 | return undef; | |
434 | } | |
435 | ||
436 | ||
437 | 1; |