mirror of
https://gitlab.com/libvirt/libvirt.git
synced 2024-08-27 19:11:16 +00:00
6dc1f10347
The %groups hash contains all the driver types (e.g. virHypervisorDriver or virSecretDriver). When searching for all the APIs that are implemented by a driver of that specific driver type, we keep iterating over the %groups hash on every line we look at, then matching against the driver type. This is inefficient because it prevents perl from caching the regex and it executes the regex once for every driver type, even though one regex matching excludes all the others, since all the driver types are different. Construct the regex containing all the driver types upfront to save about 6.4s (~98%) of the script execution time.
438 lines
12 KiB
Perl
Executable File
438 lines
12 KiB
Perl
Executable File
#!/usr/bin/perl
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use strict;
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use warnings;
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use File::Find;
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die "syntax: $0 SRCDIR\n" unless int(@ARGV) == 1;
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my $srcdir = shift @ARGV;
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my $symslibvirt = "$srcdir/libvirt_public.syms";
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my $symsqemu = "$srcdir/libvirt_qemu.syms";
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my $symslxc = "$srcdir/libvirt_lxc.syms";
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my @drivertable = (
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"$srcdir/driver-hypervisor.h",
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"$srcdir/driver-interface.h",
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"$srcdir/driver-network.h",
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"$srcdir/driver-nodedev.h",
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"$srcdir/driver-nwfilter.h",
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"$srcdir/driver-secret.h",
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"$srcdir/driver-state.h",
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"$srcdir/driver-storage.h",
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"$srcdir/driver-stream.h",
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);
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my %groupheaders = (
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"virHypervisorDriver" => "Hypervisor APIs",
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"virNetworkDriver" => "Virtual Network APIs",
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"virInterfaceDriver" => "Host Interface APIs",
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"virNodeDeviceDriver" => "Host Device APIs",
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"virStorageDriver" => "Storage Pool APIs",
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"virSecretDriver" => "Secret APIs",
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"virNWFilterDriver" => "Network Filter APIs",
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);
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my @srcs;
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find({
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wanted => sub {
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if (m!$srcdir/.*/\w+_(driver|common|tmpl|monitor|hal|udev)\.c$!) {
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push @srcs, $_ if $_ !~ /vbox_driver\.c/;
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}
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}, no_chdir => 1}, $srcdir);
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# Map API functions to the header and documentation files they're in
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# so that we can generate proper hyperlinks to their documentation.
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#
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# The function names are grep'd from the XML output of apibuild.py.
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sub getAPIFilenames {
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my $filename = shift;
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my %files;
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my $line;
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open FILE, "<", $filename or die "cannot read $filename: $!";
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while (defined($line = <FILE>)) {
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if ($line =~ /function name='([^']+)' file='([^']+)'/) {
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$files{$1} = $2;
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}
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}
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close FILE;
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if (keys %files == 0) {
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die "No functions found in $filename. Has the apibuild.py output changed?";
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}
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return \%files;
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}
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sub parseSymsFile {
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my $apisref = shift;
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my $prefix = shift;
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my $filename = shift;
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my $xmlfilename = shift;
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my $line;
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my $vers;
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my $prevvers;
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my $filenames = getAPIFilenames($xmlfilename);
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open FILE, "<$filename"
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or die "cannot read $filename: $!";
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while (defined($line = <FILE>)) {
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chomp $line;
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next if $line =~ /^\s*#/;
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next if $line =~ /^\s*$/;
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next if $line =~ /^\s*(global|local):/;
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if ($line =~ /^\s*${prefix}_(\d+\.\d+\.\d+)\s*{\s*$/) {
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if (defined $vers) {
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die "malformed syms file";
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}
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$vers = $1;
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} elsif ($line =~ /\s*}\s*;\s*$/) {
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if (defined $prevvers) {
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die "malformed syms file";
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}
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$prevvers = $vers;
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$vers = undef;
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} elsif ($line =~ /\s*}\s*${prefix}_(\d+\.\d+\.\d+)\s*;\s*$/) {
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if ($1 ne $prevvers) {
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die "malformed syms file $1 != $vers";
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}
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$prevvers = $vers;
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$vers = undef;
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} elsif ($line =~ /\s*(\w+)\s*;\s*$/) {
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$$apisref{$1} = {};
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$$apisref{$1}->{vers} = $vers;
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$$apisref{$1}->{file} = $$filenames{$1};
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} else {
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die "unexpected data $line\n";
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}
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}
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close FILE;
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}
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my %apis;
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# Get the list of all public APIs and their corresponding version
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parseSymsFile(\%apis, "LIBVIRT", $symslibvirt, "$srcdir/../docs/libvirt-api.xml");
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# And the same for the QEMU specific APIs
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parseSymsFile(\%apis, "LIBVIRT_QEMU", $symsqemu, "$srcdir/../docs/libvirt-qemu-api.xml");
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# And the same for the LXC specific APIs
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parseSymsFile(\%apis, "LIBVIRT_LXC", $symslxc, "$srcdir/../docs/libvirt-lxc-api.xml");
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# Some special things which aren't public APIs,
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# but we want to report
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$apis{virConnectSupportsFeature}->{vers} = "0.3.2";
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$apis{virDomainMigratePrepare}->{vers} = "0.3.2";
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$apis{virDomainMigratePerform}->{vers} = "0.3.2";
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$apis{virDomainMigrateFinish}->{vers} = "0.3.2";
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$apis{virDomainMigratePrepare2}->{vers} = "0.5.0";
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$apis{virDomainMigrateFinish2}->{vers} = "0.5.0";
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$apis{virDomainMigratePrepareTunnel}->{vers} = "0.7.2";
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$apis{virDomainMigrateBegin3}->{vers} = "0.9.2";
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$apis{virDomainMigratePrepare3}->{vers} = "0.9.2";
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$apis{virDomainMigratePrepareTunnel3}->{vers} = "0.9.2";
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$apis{virDomainMigratePerform3}->{vers} = "0.9.2";
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$apis{virDomainMigrateFinish3}->{vers} = "0.9.2";
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$apis{virDomainMigrateConfirm3}->{vers} = "0.9.2";
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$apis{virDomainMigrateBegin3Params}->{vers} = "1.1.0";
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$apis{virDomainMigratePrepare3Params}->{vers} = "1.1.0";
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$apis{virDomainMigratePrepareTunnel3Params}->{vers} = "1.1.0";
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$apis{virDomainMigratePerform3Params}->{vers} = "1.1.0";
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$apis{virDomainMigrateFinish3Params}->{vers} = "1.1.0";
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$apis{virDomainMigrateConfirm3Params}->{vers} = "1.1.0";
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# Now we want to get the mapping between public APIs
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# and driver struct fields. This lets us later match
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# update the driver impls with the public APis.
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my $line;
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# Group name -> hash of APIs { fields -> api name }
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my %groups;
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my $ingrp;
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foreach my $drivertable (@drivertable) {
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open FILE, "<$drivertable"
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or die "cannot read $drivertable: $!";
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while (defined($line = <FILE>)) {
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if ($line =~ /struct _(vir\w*Driver)/) {
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my $grp = $1;
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if ($grp ne "virStateDriver" &&
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$grp ne "virStreamDriver") {
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$ingrp = $grp;
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$groups{$ingrp} = { apis => {}, drivers => {} };
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}
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} elsif ($ingrp) {
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if ($line =~ /^\s*vir(?:Drv)(\w+)\s+(\w+);\s*$/) {
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my $field = $2;
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my $name = $1;
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my $api;
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if (exists $apis{"vir$name"}) {
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$api = "vir$name";
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} elsif ($name =~ /\w+(Open|Close)/) {
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next;
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} else {
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die "driver $name does not have a public API";
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}
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$groups{$ingrp}->{apis}->{$field} = $api;
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} elsif ($line =~ /};/) {
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$ingrp = undef;
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}
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}
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}
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close FILE;
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}
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# Finally, we read all the primary driver files and extract
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# the driver API tables from each one.
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foreach my $src (@srcs) {
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open FILE, "<$src" or
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die "cannot read $src: $!";
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my $groups_regex = join("|", keys %groups);
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$ingrp = undef;
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my $impl;
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while (defined($line = <FILE>)) {
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if (!$ingrp) {
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if ($line =~ /^\s*(?:static\s+)?($groups_regex)\s+(\w+)\s*=\s*{/ ||
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$line =~ /^\s*(?:static\s+)?($groups_regex)\s+NAME\(\w+\)\s*=\s*{/) {
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$ingrp = $1;
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$impl = $src;
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if ($impl =~ m,.*/node_device_(\w+)\.c,) {
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$impl = $1;
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} else {
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$impl =~ s,.*/(\w+?)_((\w+)_)?(\w+)\.c,$1,;
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}
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if ($groups{$ingrp}->{drivers}->{$impl}) {
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die "Group $ingrp already contains $impl";
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}
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$groups{$ingrp}->{drivers}->{$impl} = {};
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}
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} else {
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if ($line =~ m!\s*\.(\w+)\s*=\s*(\w+)\s*,?\s*(?:/\*\s*(\d+\.\d+\.\d+)\s*\*/\s*)?$!) {
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my $api = $1;
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my $meth = $2;
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my $vers = $3;
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next if $api eq "no" || $api eq "name";
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die "Method $meth in $src is missing version" unless defined $vers;
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die "Driver method for $api is NULL in $src" if $meth eq "NULL";
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if (!exists($groups{$ingrp}->{apis}->{$api})) {
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next if $api =~ /\w(Open|Close)/;
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die "Found unexpected method $api in $ingrp\n";
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}
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$groups{$ingrp}->{drivers}->{$impl}->{$api} = $vers;
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if ($api eq "domainMigratePrepare" ||
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$api eq "domainMigratePrepare2" ||
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$api eq "domainMigratePrepare3") {
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$groups{$ingrp}->{drivers}->{$impl}->{"domainMigrate"} = $vers
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unless $groups{$ingrp}->{drivers}->{$impl}->{"domainMigrate"};
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}
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} elsif ($line =~ /}/) {
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$ingrp = undef;
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}
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}
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}
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close FILE;
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}
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# The '.open' driver method is used for 3 public APIs, so we
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# have a bit of manual fixup todo with the per-driver versioning
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# and support matrix
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$groups{virHypervisorDriver}->{apis}->{"openAuth"} = "virConnectOpenAuth";
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$groups{virHypervisorDriver}->{apis}->{"openReadOnly"} = "virConnectOpenReadOnly";
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$groups{virHypervisorDriver}->{apis}->{"domainMigrate"} = "virDomainMigrate";
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my $openAuthVers = (0 * 1000 * 1000) + (4 * 1000) + 0;
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foreach my $drv (keys %{$groups{"virHypervisorDriver"}->{drivers}}) {
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my $openVersStr = $groups{"virHypervisorDriver"}->{drivers}->{$drv}->{"connectOpen"};
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my $openVers;
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if ($openVersStr =~ /(\d+)\.(\d+)\.(\d+)/) {
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$openVers = ($1 * 1000 * 1000) + ($2 * 1000) + $3;
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}
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# virConnectOpenReadOnly always matches virConnectOpen version
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$groups{"virHypervisorDriver"}->{drivers}->{$drv}->{"connectOpenReadOnly"} =
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$groups{"virHypervisorDriver"}->{drivers}->{$drv}->{"connectOpen"};
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# virConnectOpenAuth is always 0.4.0 if the driver existed
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# before this time, otherwise it matches the version of
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# the driver's virConnectOpen entry
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if ($openVersStr eq "Y" ||
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$openVers >= $openAuthVers) {
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$groups{"virHypervisorDriver"}->{drivers}->{$drv}->{"connectOpenAuth"} = $openVersStr;
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} else {
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$groups{"virHypervisorDriver"}->{drivers}->{$drv}->{"connectOpenAuth"} = "0.4.0";
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}
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}
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# Another special case for the virDomainCreateLinux which was replaced
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# with virDomainCreateXML
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$groups{virHypervisorDriver}->{apis}->{"domainCreateLinux"} = "virDomainCreateLinux";
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my $createAPIVers = (0 * 1000 * 1000) + (0 * 1000) + 3;
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foreach my $drv (keys %{$groups{"virHypervisorDriver"}->{drivers}}) {
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my $createVersStr = $groups{"virHypervisorDriver"}->{drivers}->{$drv}->{"domainCreateXML"};
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next unless defined $createVersStr;
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my $createVers;
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if ($createVersStr =~ /(\d+)\.(\d+)\.(\d+)/) {
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$createVers = ($1 * 1000 * 1000) + ($2 * 1000) + $3;
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}
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# virCreateLinux is always 0.0.3 if the driver existed
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# before this time, otherwise it matches the version of
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# the driver's virCreateXML entry
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if ($createVersStr eq "Y" ||
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$createVers >= $createAPIVers) {
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$groups{"virHypervisorDriver"}->{drivers}->{$drv}->{"domainCreateLinux"} = $createVersStr;
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} else {
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$groups{"virHypervisorDriver"}->{drivers}->{$drv}->{"domainCreateLinux"} = "0.0.3";
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}
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}
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# Finally we generate the HTML file with the tables
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print <<EOF;
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<title>libvirt API support matrix</title>
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</head>
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<body>
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<h1>libvirt API support matrix</h1>
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<ul id="toc"></ul>
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<p>
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This page documents which <a href="html/">libvirt calls</a> work on
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which libvirt drivers / hypervisors, and which version the API appeared
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in.
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</p>
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EOF
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foreach my $grp (sort { $a cmp $b } keys %groups) {
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print "<h2><a name=\"$grp\">", $groupheaders{$grp}, "</a></h2>\n";
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print <<EOF;
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<table class="top_table">
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<thead>
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<tr>
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<th>API</th>
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<th>Version</th>
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EOF
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foreach my $drv (sort { $a cmp $b } keys %{$groups{$grp}->{drivers}}) {
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print " <th>$drv</th>\n";
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}
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print <<EOF;
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</tr>
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</thead>
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<tbody>
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EOF
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my $row = 0;
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foreach my $field (sort {
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$groups{$grp}->{apis}->{$a}
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cmp
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$groups{$grp}->{apis}->{$b}
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} keys %{$groups{$grp}->{apis}}) {
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my $api = $groups{$grp}->{apis}->{$field};
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my $vers = $apis{$api}->{vers};
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my $htmlgrp = $apis{$api}->{file};
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print <<EOF;
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<tr>
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<td>
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EOF
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if (defined $htmlgrp) {
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print <<EOF;
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<a href=\"html/libvirt-$htmlgrp.html#$api\">$api</a>
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EOF
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} else {
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print $api;
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}
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print <<EOF;
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</td>
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<td>$vers</td>
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EOF
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foreach my $drv (sort {$a cmp $b } keys %{$groups{$grp}->{drivers}}) {
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if (exists $groups{$grp}->{drivers}->{$drv}->{$field}) {
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print "<td>", $groups{$grp}->{drivers}->{$drv}->{$field}, "</td>\n";
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} else {
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print "<td></td>\n";
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}
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}
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print <<EOF;
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</tr>
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EOF
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$row++;
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if (($row % 15) == 0) {
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print <<EOF;
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<tr>
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<th>API</th>
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<th>Version</th>
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EOF
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foreach my $drv (sort { $a cmp $b } keys %{$groups{$grp}->{drivers}}) {
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print " <th>$drv</th>\n";
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}
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print <<EOF;
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</tr>
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EOF
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}
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}
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print <<EOF;
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</tbody>
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</table>
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EOF
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}
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print <<EOF;
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</body>
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</html>
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EOF
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