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iscsi: always recheck if iscsiadm binary is available

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this avoids the need for restarting all services that have pve-storage
modules loaded after the admin installed open-iscsi.

while at it make it a bit more clear that this might die by using
assert in the method name.

Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
This commit is contained in:
Thomas Lamprecht 2023-10-27 13:42:46 +02:00
parent 90c1b10cc5
commit 6f072aaaa8
1 changed files with 22 additions and 27 deletions
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49
src/PVE/Storage/ISCSIPlugin.pm
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@ -16,35 +16,30 @@ use base qw(PVE::Storage::Plugin);
# iscsi helper function
my $ISCSIADM = '/usr/bin/iscsiadm';
$ISCSIADM = undef if ! -X $ISCSIADM;
my $found_iscsi_adm_exe;
my sub assert_iscsi_support {
my ($noerr) = @_;
return $found_iscsi_adm_exe if $found_iscsi_adm_exe; # assume it won't be removed if ever found
$found_iscsi_adm_exe = -x $ISCSIADM;
if (!$found_iscsi_adm_exe) {
die "error: no iscsi support - please install open-iscsi\n" if !$noerr;
warn "warning: no iscsi support - please install open-iscsi\n";
}
return $found_iscsi_adm_exe;
}
# Example: 192.168.122.252:3260,1 iqn.2003-01.org.linux-iscsi.proxmox-nfs.x8664:sn.00567885ba8f
my $ISCSI_TARGET_RE = qr/^((?:$IPV4RE|\[$IPV6RE\]):\d+)\,\S+\s+(\S+)\s*$/;
sub check_iscsi_support {
my $noerr = shift;
if (!$ISCSIADM) {
my $msg = "no iscsi support - please install open-iscsi";
if ($noerr) {
warn "warning: $msg\n";
return 0;
}
die "error: $msg\n";
}
return 1;
}
sub iscsi_session_list {
check_iscsi_support ();
assert_iscsi_support();
my $cmd = [$ISCSIADM, '--mode', 'session'];
my $res = {};
eval {
run_command($cmd, errmsg => 'iscsi session scan failed', outfunc => sub {
my $line = shift;
@ -75,7 +70,7 @@ sub iscsi_test_portal {
sub iscsi_portals {
my ($target, $portal_in) = @_;
check_iscsi_support ();
assert_iscsi_support();
my $res = [];
my $cmd = [$ISCSIADM, '--mode', 'node'];
@ -103,7 +98,7 @@ sub iscsi_portals {
sub iscsi_discovery {
my ($portals) = @_;
check_iscsi_support ();
assert_iscsi_support();
my $res = {};
for my $portal ($portals->@*) {
@ -133,7 +128,7 @@ sub iscsi_discovery {
sub iscsi_login {
my ($target, $portals) = @_;
check_iscsi_support();
assert_iscsi_support();
eval { iscsi_discovery($portals); };
warn $@ if $@;
@ -144,7 +139,7 @@ sub iscsi_login {
sub iscsi_logout {
my ($target) = @_;
check_iscsi_support();
assert_iscsi_support();
run_command([$ISCSIADM, '--mode', 'node', '--targetname', $target, '--logout']);
}
@ -154,7 +149,7 @@ my $rescan_filename = "/var/run/pve-iscsi-rescan.lock";
sub iscsi_session_rescan {
my $session_list = shift;
check_iscsi_support();
assert_iscsi_support();
my $rstat = stat($rescan_filename);
@ -416,7 +411,7 @@ sub status {
sub activate_storage {
my ($class, $storeid, $scfg, $cache) = @_;
return if !check_iscsi_support(1);
return if !assert_iscsi_support(1);
my $sessions = iscsi_session($cache, $scfg->{target});
my $portals = iscsi_portals($scfg->{target}, $scfg->{portal});
@ -446,7 +441,7 @@ sub activate_storage {
sub deactivate_storage {
my ($class, $storeid, $scfg, $cache) = @_;
return if !check_iscsi_support(1);
return if !assert_iscsi_support(1);
if (defined(iscsi_session($cache, $scfg->{target}))) {
iscsi_logout($scfg->{target});