[libvirt PATCH v2 04/12] util: replace TPM global variables with a struct array
Daniel P. Berrangé
berrange at redhat.com
Wed Nov 24 15:44:08 UTC 2021
The virTPMEmulatorInit function defines a struct that gets filled with
pointers to global variables. It will be simpler to just use the struct
for the global variables directly.
Signed-off-by: Daniel P. Berrangé <berrange at redhat.com>
---
src/util/virtpm.c | 121 ++++++++++++++++++++++------------------------
1 file changed, 58 insertions(+), 63 deletions(-)
diff --git a/src/util/virtpm.c b/src/util/virtpm.c
index cc9173cecd..2539ea9275 100644
--- a/src/util/virtpm.c
+++ b/src/util/virtpm.c
@@ -96,29 +96,52 @@ virTPMCreateCancelPath(const char *devpath)
* capabilities bitmap
*/
static virMutex swtpm_tools_lock = VIR_MUTEX_INITIALIZER;
-static char *swtpm_path;
-static struct stat swtpm_stat;
-static virBitmap *swtpm_caps;
-
-static char *swtpm_setup_path;
-static struct stat swtpm_setup_stat;
-static virBitmap *swtpm_setup_caps;
-
-static char *swtpm_ioctl_path;
-static struct stat swtpm_ioctl_stat;
typedef int (*virTPMBinaryCapsParse)(const char *);
+typedef enum _virTPMBinary {
+ VIR_TPM_BINARY_SWTPM,
+ VIR_TPM_BINARY_SWTPM_SETUP,
+ VIR_TPM_BINARY_SWTPM_IOCTL,
+
+ VIR_TPM_BINARY_LAST
+} virTPMBinary;
+
+VIR_ENUM_DECL(virTPMBinary);
+VIR_ENUM_IMPL(virTPMBinary,
+ VIR_TPM_BINARY_LAST,
+ "swtpm", "swtpm_setup", "swtpm_ioctl");
+
+typedef struct _virTPMBinaryInfo {
+ char *path;
+ struct stat stat;
+ const char *parm;
+ virBitmap *caps;
+ virTPMBinaryCapsParse capsParse;
+} virTPMBinaryInfo;
+
+static virTPMBinaryInfo swtpmBinaries[VIR_TPM_BINARY_LAST] = {
+ [VIR_TPM_BINARY_SWTPM] = {
+ .parm = "socket",
+ .capsParse = virTPMSwtpmFeatureTypeFromString,
+ },
+ [VIR_TPM_BINARY_SWTPM_SETUP] = {
+ .capsParse = virTPMSwtpmSetupFeatureTypeFromString,
+ },
+ [VIR_TPM_BINARY_SWTPM_IOCTL] = {
+ },
+};
+
static char *
-virTPMBinaryGetPath(char **path_var)
+virTPMBinaryGetPath(virTPMBinary binary)
{
char *s;
- if (!*path_var && virTPMEmulatorInit() < 0)
+ if (!swtpmBinaries[binary].path && virTPMEmulatorInit() < 0)
return NULL;
virMutexLock(&swtpm_tools_lock);
- s = g_strdup(*path_var);
+ s = g_strdup(swtpmBinaries[binary].path);
virMutexUnlock(&swtpm_tools_lock);
return s;
@@ -127,19 +150,19 @@ virTPMBinaryGetPath(char **path_var)
char *
virTPMGetSwtpm(void)
{
- return virTPMBinaryGetPath(&swtpm_path);
+ return virTPMBinaryGetPath(VIR_TPM_BINARY_SWTPM);
}
char *
virTPMGetSwtpmSetup(void)
{
- return virTPMBinaryGetPath(&swtpm_setup_path);
+ return virTPMBinaryGetPath(VIR_TPM_BINARY_SWTPM_SETUP);
}
char *
virTPMGetSwtpmIoctl(void)
{
- return virTPMBinaryGetPath(&swtpm_ioctl_path);
+ return virTPMBinaryGetPath(VIR_TPM_BINARY_SWTPM_IOCTL);
}
/* virTPMExecGetCaps
@@ -245,62 +268,33 @@ int
virTPMEmulatorInit(void)
{
int ret = -1;
- static const struct {
- const char *name;
- char **path;
- struct stat *stat;
- const char *parm;
- virBitmap **caps;
- virTPMBinaryCapsParse capsParse;
- } prgs[] = {
- {
- .name = "swtpm",
- .path = &swtpm_path,
- .stat = &swtpm_stat,
- .parm = "socket",
- .caps = &swtpm_caps,
- .capsParse = virTPMSwtpmFeatureTypeFromString,
- },
- {
- .name = "swtpm_setup",
- .path = &swtpm_setup_path,
- .stat = &swtpm_setup_stat,
- .caps = &swtpm_setup_caps,
- .capsParse = virTPMSwtpmSetupFeatureTypeFromString,
- },
- {
- .name = "swtpm_ioctl",
- .path = &swtpm_ioctl_path,
- .stat = &swtpm_ioctl_stat,
- }
- };
size_t i;
virMutexLock(&swtpm_tools_lock);
- for (i = 0; i < G_N_ELEMENTS(prgs); i++) {
+ for (i = 0; i < VIR_TPM_BINARY_LAST; i++) {
g_autofree char *path = NULL;
- bool findit = *prgs[i].path == NULL;
+ bool findit = swtpmBinaries[i].path == NULL;
struct stat statbuf;
if (!findit) {
/* has executables changed? */
- if (stat(*prgs[i].path, &statbuf) < 0)
+ if (stat(swtpmBinaries[i].path, &statbuf) < 0)
findit = true;
if (!findit &&
- statbuf.st_mtime != prgs[i].stat->st_mtime)
+ statbuf.st_mtime != swtpmBinaries[i].stat.st_mtime)
findit = true;
}
if (findit) {
- VIR_FREE(*prgs[i].path);
+ VIR_FREE(swtpmBinaries[i].path);
- path = virFindFileInPath(prgs[i].name);
+ path = virFindFileInPath(virTPMBinaryTypeToString(i));
if (!path) {
virReportSystemError(ENOENT,
- _("Unable to find '%s' binary in $PATH"),
- prgs[i].name);
+ _("Unable to find '%s' binary in $PATH"),
+ virTPMBinaryTypeToString(i));
goto cleanup;
}
if (!virFileIsExecutable(path)) {
@@ -309,17 +303,18 @@ virTPMEmulatorInit(void)
path);
goto cleanup;
}
- if (stat(path, prgs[i].stat) < 0) {
+ if (stat(path, &swtpmBinaries[i].stat) < 0) {
virReportSystemError(errno,
_("Could not stat %s"), path);
goto cleanup;
}
- *prgs[i].path = g_steal_pointer(&path);
+ swtpmBinaries[i].path = g_steal_pointer(&path);
- if (prgs[i].caps) {
- *prgs[i].caps = virTPMGetCaps(prgs[i].capsParse,
- *prgs[i].path, prgs[i].parm);
- if (!*prgs[i].caps)
+ if (swtpmBinaries[i].capsParse) {
+ swtpmBinaries[i].caps = virTPMGetCaps(swtpmBinaries[i].capsParse,
+ swtpmBinaries[i].path,
+ swtpmBinaries[i].parm);
+ if (!swtpmBinaries[i].caps)
goto cleanup;
}
}
@@ -334,22 +329,22 @@ virTPMEmulatorInit(void)
}
static bool
-virTPMBinaryGetCaps(virBitmap **caps_var,
+virTPMBinaryGetCaps(virTPMBinary binary,
unsigned int cap)
{
if (virTPMEmulatorInit() < 0)
return false;
- return virBitmapIsBitSet(*caps_var, cap);
+ return virBitmapIsBitSet(swtpmBinaries[binary].caps, cap);
}
bool
virTPMSwtpmCapsGet(unsigned int cap)
{
- return virTPMBinaryGetCaps(&swtpm_caps, cap);
+ return virTPMBinaryGetCaps(VIR_TPM_BINARY_SWTPM, cap);
}
bool
virTPMSwtpmSetupCapsGet(unsigned int cap)
{
- return virTPMBinaryGetCaps(&swtpm_setup_caps, cap);
+ return virTPMBinaryGetCaps(VIR_TPM_BINARY_SWTPM_SETUP, cap);
}
--
2.33.1
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