deps: moving skiplock breaks qemu-server << 4.0-109

[pve-common.git] / src / PVE / ProcFSTools.pm

diff --git a/src/PVE/ProcFSTools.pm b/src/PVE/ProcFSTools.pm
index 8bb0d729b50b8ab974cdbc5d3b2ac57d5fe24e70..05fd744367a9780fa80a719751bb897eb4296ecd 100644 (file)
--- a/src/PVE/ProcFSTools.pm
+++ b/src/PVE/ProcFSTools.pm
@@ -6,6 +6,13 @@ use POSIX;
 use Time::HiRes qw (gettimeofday);
 use IO::File;
 use PVE::Tools;
+use Cwd qw();
+
+use Socket qw(PF_INET PF_INET6 SOCK_DGRAM IPPROTO_IP);
+
+use constant IFF_UP => 1;
+use constant IFNAMSIZ => 16;
+use constant SIOCGIFFLAGS => 0x8913;
 
 my $clock_ticks = POSIX::sysconf(&POSIX::_SC_CLK_TCK);
 
@@ -284,4 +291,125 @@ sub read_proc_net_route {
     return $res;
 }
 
+sub read_proc_mounts {
+    return PVE::Tools::file_get_contents("/proc/mounts");
+}
+
+# mounts encode spaces (\040), tabs (\011), newlines (\012), backslashes (\\ or \134)
+sub decode_mount {
+    my ($str) = @_;
+    return $str =~ s/\\(?:040|01[12]|134|\\)/"\"$&\""/geer;
+}
+
+sub parse_mounts {
+    my ($mounts) = @_;
+    my $mntent = [];
+    while ($mounts =~ /^\s*([^#].*)$/gm) {
+       # lines from the file are encoded so we can just split at spaces
+       my ($what, $dir, $fstype, $opts) = split(/[ \t]/, $1, 4);
+       my ($freq, $passno) = (0, 0);
+       # in glibc's parser frequency and pass seem to be optional
+       $freq = $1 if $opts =~ s/\s+(\d+)$//;
+       $passno = $1 if $opts =~ s/\s+(\d+)$//;
+       push @$mntent, [decode_mount($what),
+                       decode_mount($dir),
+                       decode_mount($fstype),
+                       decode_mount($opts),
+                       $freq, $passno];
+    }
+    return $mntent;
+}
+
+sub parse_proc_mounts {
+    return parse_mounts(read_proc_mounts());
+}
+
+sub is_mounted {
+    my ($mountpoint) = @_;
+
+    $mountpoint = Cwd::realpath($mountpoint);
+
+    return 0 if !defined($mountpoint); # path does not exist
+
+    my $mounts = parse_proc_mounts();
+    return (grep { $_->[1] eq $mountpoint } @$mounts) ? 1 : 0;
+}
+
+sub read_proc_net_ipv6_route {
+    my $filename = "/proc/net/ipv6_route";
+
+    my $res = [];
+
+    my $fh = IO::File->new ($filename, "r");
+    return $res if !$fh;
+
+    my $read_v6addr = sub { $_[0] =~ s/....(?!$)/$&:/gr };
+
+    # ipv6_route has no header
+    while (defined(my $line = <$fh>)) {
+       my ($dest, $prefix, $nexthop, $metric, $iface) = (split(/\s+/, $line))[0,1,4,5,9];
+       push @$res, {
+           dest => &$read_v6addr($dest),
+           prefix => hex("$prefix"),
+           gateway => &$read_v6addr($nexthop),
+           metric => hex("$metric"),
+           iface => $iface
+       };
+    }
+
+    return $res;
+}
+
+sub upid_wait {
+    my ($upid, $waitfunc, $sleep_intervall) = @_;
+
+    my $task = PVE::Tools::upid_decode($upid);
+
+    $sleep_intervall = $sleep_intervall ? $sleep_intervall : 1;
+
+    my $next_time = time + $sleep_intervall;
+
+    while (check_process_running($task->{pid}, $task->{pstart})) {
+
+       if (time >= $next_time && $waitfunc && ref($waitfunc) eq 'CODE'){
+           &$waitfunc($task);
+           $next_time = time + $sleep_intervall;
+       }
+
+       CORE::sleep(1);
+    }
+}
+
+# struct ifreq { // FOR SIOCGIFFLAGS:
+#   char ifrn_name[IFNAMSIZ]
+#   short ifru_flags
+# };
+my $STRUCT_IFREQ_SIOCGIFFLAGS = 'Z' . IFNAMSIZ . 's1';
+sub get_active_network_interfaces {
+    # Use the interface name list from /proc/net/dev
+    open my $fh, '<', '/proc/net/dev'
+       or die "failed to open /proc/net/dev: $!\n";
+    # And filter by IFF_UP flag fetched via a PF_INET6 socket ioctl:
+    my $sock;
+    socket($sock, PF_INET6, SOCK_DGRAM, &IPPROTO_IP)
+    or socket($sock, PF_INET, SOCK_DGRAM, &IPPROTO_IP)
+    or return [];
+
+    my $ifaces = [];
+    while(defined(my $line = <$fh>)) {
+       next if $line !~ /^\s*([^:\s]+):/;
+       my $ifname = $1;
+       my $ifreq = pack($STRUCT_IFREQ_SIOCGIFFLAGS, $ifname, 0);
+       if (!defined(ioctl($sock, SIOCGIFFLAGS, $ifreq))) {
+           warn "failed to get interface flags for: $ifname\n";
+           next;
+       }
+       my ($name, $flags) = unpack($STRUCT_IFREQ_SIOCGIFFLAGS, $ifreq);
+       push @$ifaces, $ifname if ($flags & IFF_UP);
+    }
+    close $fh;
+    close $sock;
+    return $ifaces;
+}
+
 1;