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Use helpers for parsing of cgroup labels

This commit is contained in:
Benny Baumann 2021-11-21 19:57:44 +01:00 committed by BenBE
parent 915b558bbe
commit 55e073a455
1 changed files with 21 additions and 9 deletions
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30
linux/CGroupUtils.c
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@ -48,6 +48,18 @@ static bool StrBuf_putsz(StrBuf_state* p, StrBuf_putc_t w, const char* s) {
return true;
}
static bool Label_checkEqual(const char* labelStart, size_t labelLen, const char* expected) {
return labelLen == strlen(expected) && String_startsWith(labelStart, expected);
}
static bool Label_checkPrefix(const char* labelStart, size_t labelLen, const char* expected) {
return labelLen > strlen(expected) && String_startsWith(labelStart, expected);
}
static bool Label_checkSuffix(const char* labelStart, size_t labelLen, const char* expected) {
return labelLen > strlen(expected) && String_startsWith(labelStart + labelLen - strlen(expected), expected);
}
static bool CGroup_filterName_internal(const char *cgroup, StrBuf_state* s, StrBuf_putc_t w) {
const char* str_slice_suffix = ".slice";
const char* str_system_slice = "system.slice";
@ -80,7 +92,7 @@ static bool CGroup_filterName_internal(const char *cgroup, StrBuf_state* s, StrB
const char* nextSlash = strchrnul(labelStart, '/');
const size_t labelLen = nextSlash - labelStart;
if (labelLen == strlen(str_system_slice) && String_startsWith(cgroup, str_system_slice)) {
if (Label_checkEqual(labelStart, labelLen, str_system_slice)) {
cgroup = nextSlash;
if (!StrBuf_putsz(s, w, "[S]"))
@ -89,7 +101,7 @@ static bool CGroup_filterName_internal(const char *cgroup, StrBuf_state* s, StrB
continue;
}
if (labelLen == strlen(str_machine_slice) && String_startsWith(cgroup, str_machine_slice)) {
if (Label_checkEqual(labelStart, labelLen, str_machine_slice)) {
cgroup = nextSlash;
if (!StrBuf_putsz(s, w, "[M]"))
@ -98,7 +110,7 @@ static bool CGroup_filterName_internal(const char *cgroup, StrBuf_state* s, StrB
continue;
}
if (labelLen == strlen(str_user_slice) && String_startsWith(cgroup, str_user_slice)) {
if (Label_checkEqual(labelStart, labelLen, str_user_slice)) {
cgroup = nextSlash;
if (!StrBuf_putsz(s, w, "[U]"))
@ -130,7 +142,7 @@ static bool CGroup_filterName_internal(const char *cgroup, StrBuf_state* s, StrB
continue;
}
if (labelLen > strlen(str_slice_suffix) && String_startsWith(nextSlash - strlen(str_slice_suffix), str_slice_suffix)) {
if (Label_checkSuffix(labelStart, labelLen, str_slice_suffix)) {
const size_t sliceNameLen = labelLen - strlen(str_slice_suffix);
if (!w(s, '['))
@ -147,7 +159,7 @@ static bool CGroup_filterName_internal(const char *cgroup, StrBuf_state* s, StrB
continue;
}
if (String_startsWith(cgroup, str_lxc_payload_prefix)) {
if (Label_checkPrefix(labelStart, labelLen, str_lxc_payload_prefix)) {
const size_t cgroupNameLen = labelLen - strlen(str_lxc_payload_prefix);
if (!StrBuf_putsz(s, w, "[lxc:"))
@ -164,7 +176,7 @@ static bool CGroup_filterName_internal(const char *cgroup, StrBuf_state* s, StrB
continue;
}
if (String_startsWith(cgroup, str_lxc_monitor_prefix)) {
if (Label_checkPrefix(labelStart, labelLen, str_lxc_monitor_prefix)) {
const size_t cgroupNameLen = labelLen - strlen(str_lxc_monitor_prefix);
if (!StrBuf_putsz(s, w, "[LXC:"))
@ -181,7 +193,7 @@ static bool CGroup_filterName_internal(const char *cgroup, StrBuf_state* s, StrB
continue;
}
if (labelLen > strlen(str_service_suffix) && String_startsWith(nextSlash - strlen(str_service_suffix), str_service_suffix)) {
if (Label_checkSuffix(labelStart, labelLen, str_service_suffix)) {
const size_t serviceNameLen = labelLen - strlen(str_service_suffix);
if (String_startsWith(cgroup, "user@")) {
@ -201,10 +213,10 @@ static bool CGroup_filterName_internal(const char *cgroup, StrBuf_state* s, StrB
continue;
}
if (labelLen > strlen(str_scope_suffix) && String_startsWith(nextSlash - strlen(str_scope_suffix), str_scope_suffix)) {
if (Label_checkSuffix(labelStart, labelLen, str_scope_suffix)) {
const size_t scopeNameLen = labelLen - strlen(str_scope_suffix);
if (String_startsWith(cgroup, str_nspawn_scope_prefix)) {
if (Label_checkPrefix(labelStart, scopeNameLen, str_nspawn_scope_prefix)) {
const size_t machineScopeNameLen = scopeNameLen - strlen(str_nspawn_scope_prefix);
const bool is_monitor = String_startsWith(nextSlash, str_nspawn_monitor_label);