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// Copyright 2023 syzkaller project authors. All rights reserved.
// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
package linux
import (
"fmt"
"regexp"
"strings"
"github.com/google/syzkaller/pkg/subsystem"
)
// setSubsystemNames assigns unique names to the presented subsystems.
// If it failed to assign a name to a subsystem, the Name field remains empty.
func setSubsystemNames(list []*subsystem.Subsystem) error {
dups := map[string]string{}
for _, item := range list {
if item.Name == "" {
continue
}
if dups[item.Name] != "" {
return fmt.Errorf("duplicate name: %q", item.Name)
}
dups[item.Name] = item.Name
}
for _, item := range list {
if item.Name != "" {
continue
}
// For now, we can only infer name from the list email.
if len(item.Lists) == 0 {
return fmt.Errorf("no lists for %#v", item)
}
email := item.Lists[0]
name := emailToName(email)
if !validateName(name) {
return fmt.Errorf("failed to extract a name from %s", email)
}
if dups[name] != "" {
return fmt.Errorf("duplicate subsystem name: %q and %q", dups[name], email)
}
item.Name = name
dups[name] = email
}
return nil
}
func validateName(name string) bool {
const (
minLen = 2
maxLen = 16 // otherwise the email subject can get too big
)
return len(name) >= minLen && len(name) <= maxLen
}
func emailToName(email string) string {
if name := emailExceptions[email]; name != "" {
return name
}
ret := emailStripRe.FindStringSubmatch(email)
if ret == nil {
return ""
}
return strings.ReplaceAll(ret[1], ".", "")
}
func buildEmailStripRe() *regexp.Regexp {
raw := `^(?:`
for i := 0; i < len(stripPrefixes); i++ {
if i > 0 {
raw += "|"
}
raw += regexp.QuoteMeta(stripPrefixes[i])
}
raw += ")*(.*?)(?:"
for i := 0; i < len(stripSuffixes); i++ {
if i > 0 {
raw += "|"
}
raw += regexp.QuoteMeta(stripSuffixes[i])
}
raw += ")*@.*$"
return regexp.MustCompile(raw)
}
var (
emailExceptions = map[string]string{
"patches@opensource.cirrus.com": "cirrus",
"virtualization@lists.linux-foundation.org": "virt", // the name is too long
"dev@openvswitch.org": "openvswitch",
"devel@acpica.org": "acpica",
"kernel@dh-electronics.com": "dh-electr",
"devel@lists.orangefs.org": "orangefs",
"linux-arm-kernel@axis.com": "axis",
"Dell.Client.Kernel@dell.com": "dell",
"sound-open-firmware@alsa-project.org": "sof",
"platform-driver-x86@vger.kernel.org": "x86-drivers",
"linux-trace-devel@vger.kernel.org": "rt-tools",
"aws-nitro-enclaves-devel@amazon.com": "nitro",
"brcm80211-dev-list.pdl@broadcom.com": "brcm80211",
"osmocom-net-gprs@lists.osmocom.org": "osmocom",
"netdev@vger.kernel.org": "net",
"megaraidlinux.pdl@broadcom.com": "megaraid",
"mpi3mr-linuxdrv.pdl@broadcom.com": "mpi3",
"MPT-FusionLinux.pdl@broadcom.com": "mpt-fusion",
"linux-security-module@vger.kernel.org": "lsm", // the original name is too long
"linux-unionfs@vger.kernel.org": "overlayfs", // the name has changed
"rust-for-linux@vger.kernel.org": "rust",
"industrypack-devel@lists.sourceforge.net": "ipack",
"v9fs-developer@lists.sourceforge.net": "9p",
"kernel-tls-handshake@lists.linux.dev": "tls",
"bcm-kernel-feedback-list@broadcom.com": "broadcom",
"linux@ew.tq-group.com": "tq-systems",
"linux-imx@nxp.com": "nxp",
}
stripPrefixes = []string{"linux-"}
stripSuffixes = []string{
"-devel", "-dev", "-devs", "-developer", "devel",
"-user", "-users",
"-discussion", "-discuss", "-list", "-en", "-bugreport", "list",
"-kernel", "-linux", "-general", "-platform",
}
emailStripRe = buildEmailStripRe()
)
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