[libvirt] [PATCH v3 06/10] qemu_driver: use VIR_AUTOFREE() with strings 1/3
Daniel Henrique Barboza
danielhb413 at gmail.com
Tue Oct 15 20:08:48 UTC 2019
Using VIR_AUTOFREE() in all strings of qemu_driver.c make the code
a bit tidier and smaller, sparing VIR_FREE() calls and sometimes a
whole 'cleanup' label.
This is a huge change due to the amount of char * declared in
this file, thus let's split it in 3. This is the first part.
Signed-off-by: Daniel Henrique Barboza <danielhb413 at gmail.com>
---
src/qemu/qemu_driver.c | 103 +++++++++++++----------------------------
1 file changed, 33 insertions(+), 70 deletions(-)
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index d95c5c5b81..f887a79ecd 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -381,11 +381,9 @@ qemuDomainSnapshotLoad(virDomainObjPtr vm,
void *data)
{
char *baseDir = (char *)data;
- char *snapDir = NULL;
+ VIR_AUTOFREE(char *) snapDir = NULL;
DIR *dir = NULL;
struct dirent *entry;
- char *xmlStr;
- char *fullpath;
virDomainSnapshotDefPtr def = NULL;
virDomainMomentObjPtr snap = NULL;
virDomainMomentObjPtr current = NULL;
@@ -420,6 +418,9 @@ qemuDomainSnapshotLoad(virDomainObjPtr vm,
goto cleanup;
while ((direrr = virDirRead(dir, &entry, NULL)) > 0) {
+ VIR_AUTOFREE(char *) xmlStr = NULL;
+ VIR_AUTOFREE(char *) fullpath = NULL;
+
/* NB: ignoring errors, so one malformed config doesn't
kill the whole process */
VIR_INFO("Loading snapshot file '%s'", entry->d_name);
@@ -435,7 +436,6 @@ qemuDomainSnapshotLoad(virDomainObjPtr vm,
virReportSystemError(errno,
_("Failed to read snapshot file %s"),
fullpath);
- VIR_FREE(fullpath);
continue;
}
@@ -448,8 +448,6 @@ qemuDomainSnapshotLoad(virDomainObjPtr vm,
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Failed to parse snapshot XML from file '%s'"),
fullpath);
- VIR_FREE(fullpath);
- VIR_FREE(xmlStr);
continue;
}
@@ -463,9 +461,6 @@ qemuDomainSnapshotLoad(virDomainObjPtr vm,
vm->def->name);
current = snap;
}
-
- VIR_FREE(fullpath);
- VIR_FREE(xmlStr);
}
if (direrr < 0)
virReportError(VIR_ERR_INTERNAL_ERROR,
@@ -492,7 +487,6 @@ qemuDomainSnapshotLoad(virDomainObjPtr vm,
ret = 0;
cleanup:
VIR_DIR_CLOSE(dir);
- VIR_FREE(snapDir);
virObjectUnlock(vm);
return ret;
}
@@ -503,11 +497,9 @@ qemuDomainCheckpointLoad(virDomainObjPtr vm,
void *data)
{
char *baseDir = (char *)data;
- char *chkDir = NULL;
+ VIR_AUTOFREE(char *) chkDir = NULL;
DIR *dir = NULL;
struct dirent *entry;
- char *xmlStr;
- char *fullpath;
virDomainCheckpointDefPtr def = NULL;
virDomainMomentObjPtr chk = NULL;
virDomainMomentObjPtr current = NULL;
@@ -538,6 +530,9 @@ qemuDomainCheckpointLoad(virDomainObjPtr vm,
goto cleanup;
while ((direrr = virDirRead(dir, &entry, NULL)) > 0) {
+ VIR_AUTOFREE(char *) xmlStr = NULL;
+ VIR_AUTOFREE(char *) fullpath = NULL;
+
/* NB: ignoring errors, so one malformed config doesn't
kill the whole process */
VIR_INFO("Loading checkpoint file '%s'", entry->d_name);
@@ -553,7 +548,6 @@ qemuDomainCheckpointLoad(virDomainObjPtr vm,
virReportSystemError(errno,
_("Failed to read checkpoint file %s"),
fullpath);
- VIR_FREE(fullpath);
continue;
}
@@ -566,8 +560,6 @@ qemuDomainCheckpointLoad(virDomainObjPtr vm,
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Failed to parse checkpoint XML from file '%s'"),
fullpath);
- VIR_FREE(fullpath);
- VIR_FREE(xmlStr);
virObjectUnref(def);
continue;
}
@@ -575,9 +567,6 @@ qemuDomainCheckpointLoad(virDomainObjPtr vm,
chk = virDomainCheckpointAssignDef(vm->checkpoints, def);
if (chk == NULL)
virObjectUnref(def);
-
- VIR_FREE(fullpath);
- VIR_FREE(xmlStr);
}
if (direrr < 0)
virReportError(VIR_ERR_INTERNAL_ERROR,
@@ -602,7 +591,6 @@ qemuDomainCheckpointLoad(virDomainObjPtr vm,
ret = 0;
cleanup:
VIR_DIR_CLOSE(dir);
- VIR_FREE(chkDir);
virObjectUnlock(vm);
return ret;
}
@@ -660,12 +648,11 @@ qemuStateInitialize(bool privileged,
virStateInhibitCallback callback,
void *opaque)
{
- char *driverConf = NULL;
+ VIR_AUTOFREE(char *) driverConf = NULL;
virQEMUDriverConfigPtr cfg;
uid_t run_uid = -1;
gid_t run_gid = -1;
- char *hugepagePath = NULL;
- char *memoryBackingPath = NULL;
+ VIR_AUTOFREE(char *) memoryBackingPath = NULL;
bool autostart = true;
size_t i;
@@ -706,7 +693,6 @@ qemuStateInitialize(bool privileged,
if (virQEMUDriverConfigLoadFile(cfg, driverConf, privileged) < 0)
goto error;
- VIR_FREE(driverConf);
if (virQEMUDriverConfigValidate(cfg) < 0)
goto error;
@@ -830,7 +816,7 @@ qemuStateInitialize(bool privileged,
goto error;
if (privileged) {
- char *channeldir;
+ VIR_AUTOFREE(char *) channeldir = NULL;
if (chown(cfg->libDir, cfg->user, cfg->group) < 0) {
virReportSystemError(errno,
@@ -883,10 +869,8 @@ qemuStateInitialize(bool privileged,
_("unable to set ownership of '%s' to %d:%d"),
channeldir, (int)cfg->user,
(int)cfg->group);
- VIR_FREE(channeldir);
goto error;
}
- VIR_FREE(channeldir);
if (chown(cfg->channelTargetDir, cfg->user, cfg->group) < 0) {
virReportSystemError(errno,
_("unable to set ownership of '%s' to %d:%d"),
@@ -937,6 +921,8 @@ qemuStateInitialize(bool privileged,
* it, since we can't assume the root mount point has permissions that
* will let our spawned QEMU instances use it. */
for (i = 0; i < cfg->nhugetlbfs; i++) {
+ VIR_AUTOFREE(char *) hugepagePath = NULL;
+
hugepagePath = qemuGetBaseHugepagePath(&cfg->hugetlbfs[i]);
if (!hugepagePath)
@@ -952,7 +938,6 @@ qemuStateInitialize(bool privileged,
virFileUpdatePerm(cfg->hugetlbfs[i].mnt_dir,
0, S_IXGRP | S_IXOTH) < 0)
goto error;
- VIR_FREE(hugepagePath);
}
if (qemuGetMemoryBackingBasePath(cfg, &memoryBackingPath) < 0)
@@ -969,7 +954,6 @@ qemuStateInitialize(bool privileged,
virFileUpdatePerm(memoryBackingPath,
0, S_IXGRP | S_IXOTH) < 0)
goto error;
- VIR_FREE(memoryBackingPath);
if (!(qemu_driver->closeCallbacks = virCloseCallbacksNew()))
goto error;
@@ -1038,9 +1022,6 @@ qemuStateInitialize(bool privileged,
return VIR_DRV_STATE_INIT_COMPLETE;
error:
- VIR_FREE(driverConf);
- VIR_FREE(hugepagePath);
- VIR_FREE(memoryBackingPath);
qemuStateCleanup();
return VIR_DRV_STATE_INIT_ERROR;
}
@@ -1365,8 +1346,8 @@ static int
qemuGetSchedInfo(unsigned long long *cpuWait,
pid_t pid, pid_t tid)
{
- char *proc = NULL;
- char *data = NULL;
+ VIR_AUTOFREE(char *) proc = NULL;
+ VIR_AUTOFREE(char *) data = NULL;
char **lines = NULL;
size_t i;
int ret = -1;
@@ -1430,8 +1411,6 @@ qemuGetSchedInfo(unsigned long long *cpuWait,
ret = 0;
cleanup:
- VIR_FREE(data);
- VIR_FREE(proc);
virStringListFree(lines);
return ret;
}
@@ -1441,7 +1420,7 @@ static int
qemuGetProcessInfo(unsigned long long *cpuTime, int *lastCpu, long *vm_rss,
pid_t pid, int tid)
{
- char *proc;
+ VIR_AUTOFREE(char *) proc = NULL;
FILE *pidinfo;
unsigned long long usertime = 0, systime = 0;
long rss = 0;
@@ -1458,7 +1437,6 @@ qemuGetProcessInfo(unsigned long long *cpuTime, int *lastCpu, long *vm_rss,
return -1;
pidinfo = fopen(proc, "r");
- VIR_FREE(proc);
/* See 'man proc' for information about what all these fields are. We're
* only interested in a very few of them */
@@ -2910,9 +2888,8 @@ virQEMUSaveDataWrite(virQEMUSaveDataPtr data,
size_t len;
size_t xml_len;
size_t cookie_len = 0;
- int ret = -1;
size_t zerosLen = 0;
- char *zeros = NULL;
+ VIR_AUTOFREE(char *) zeros = NULL;
xml_len = strlen(data->xml) + 1;
if (data->cookie)
@@ -2924,12 +2901,12 @@ virQEMUSaveDataWrite(virQEMUSaveDataPtr data,
if (len > header->data_len) {
virReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("new xml too large to fit in file"));
- goto cleanup;
+ return -1;
}
zerosLen = header->data_len - len;
if (VIR_ALLOC_N(zeros, zerosLen) < 0)
- goto cleanup;
+ return -1;
} else {
header->data_len = len;
}
@@ -2941,14 +2918,14 @@ virQEMUSaveDataWrite(virQEMUSaveDataPtr data,
virReportSystemError(errno,
_("failed to write header to domain save file '%s'"),
path);
- goto cleanup;
+ return -1;
}
if (safewrite(fd, data->xml, xml_len) != xml_len) {
virReportSystemError(errno,
_("failed to write domain xml to '%s'"),
path);
- goto cleanup;
+ return -1;
}
if (data->cookie &&
@@ -2956,21 +2933,17 @@ virQEMUSaveDataWrite(virQEMUSaveDataPtr data,
virReportSystemError(errno,
_("failed to write cookie to '%s'"),
path);
- goto cleanup;
+ return -1;
}
if (safewrite(fd, zeros, zerosLen) != zerosLen) {
virReportSystemError(errno,
_("failed to write padding to '%s'"),
path);
- goto cleanup;
+ return -1;
}
- ret = 0;
-
- cleanup:
- VIR_FREE(zeros);
- return ret;
+ return 0;
}
@@ -3300,7 +3273,7 @@ qemuDomainSaveInternal(virQEMUDriverPtr driver,
int compressed, const char *compressedpath,
const char *xmlin, unsigned int flags)
{
- char *xml = NULL;
+ VIR_AUTOFREE(char *) xml = NULL;
bool was_running = false;
int ret = -1;
virObjectEventPtr event = NULL;
@@ -3381,7 +3354,6 @@ qemuDomainSaveInternal(virQEMUDriverPtr driver,
if (!(data = virQEMUSaveDataNew(xml, cookie, was_running, compressed,
driver->xmlopt)))
goto endjob;
- xml = NULL;
ret = qemuDomainSaveMemory(driver, vm, path, data, compressedpath,
flags, QEMU_ASYNC_JOB_SAVE);
@@ -3416,7 +3388,6 @@ qemuDomainSaveInternal(virQEMUDriverPtr driver,
qemuDomainRemoveInactiveJob(driver, vm);
cleanup:
- VIR_FREE(xml);
virQEMUSaveDataFree(data);
virObjectEventStateQueue(driver->domainEventState, event);
return ret;
@@ -3504,7 +3475,7 @@ qemuDomainSaveFlags(virDomainPtr dom, const char *path, const char *dxml,
{
virQEMUDriverPtr driver = dom->conn->privateData;
int compressed;
- char *compressedpath = NULL;
+ VIR_AUTOFREE(char *) compressedpath = NULL;
int ret = -1;
virDomainObjPtr vm = NULL;
VIR_AUTOUNREF(virQEMUDriverConfigPtr) cfg = NULL;
@@ -3533,7 +3504,6 @@ qemuDomainSaveFlags(virDomainPtr dom, const char *path, const char *dxml,
cleanup:
virDomainObjEndAPI(&vm);
- VIR_FREE(compressedpath);
return ret;
}
@@ -3561,9 +3531,9 @@ qemuDomainManagedSave(virDomainPtr dom, unsigned int flags)
virQEMUDriverPtr driver = dom->conn->privateData;
VIR_AUTOUNREF(virQEMUDriverConfigPtr) cfg = NULL;
int compressed;
- char *compressedpath = NULL;
+ VIR_AUTOFREE(char *) compressedpath = NULL;
virDomainObjPtr vm;
- char *name = NULL;
+ VIR_AUTOFREE(char *) name = NULL;
int ret = -1;
virCheckFlags(VIR_DOMAIN_SAVE_BYPASS_CACHE |
@@ -3603,8 +3573,6 @@ qemuDomainManagedSave(virDomainPtr dom, unsigned int flags)
cleanup:
virDomainObjEndAPI(&vm);
- VIR_FREE(name);
- VIR_FREE(compressedpath);
return ret;
}
@@ -3614,7 +3582,7 @@ qemuDomainManagedSaveLoad(virDomainObjPtr vm,
void *opaque)
{
virQEMUDriverPtr driver = opaque;
- char *name;
+ VIR_AUTOFREE(char *) name = NULL;
int ret = -1;
virObjectLock(vm);
@@ -3627,7 +3595,6 @@ qemuDomainManagedSaveLoad(virDomainObjPtr vm,
ret = 0;
cleanup:
virObjectUnlock(vm);
- VIR_FREE(name);
return ret;
}
@@ -3659,7 +3626,7 @@ qemuDomainManagedSaveRemove(virDomainPtr dom, unsigned int flags)
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
- char *name = NULL;
+ VIR_AUTOFREE(char *) name = NULL;
virCheckFlags(0, -1);
@@ -3683,7 +3650,6 @@ qemuDomainManagedSaveRemove(virDomainPtr dom, unsigned int flags)
ret = 0;
cleanup:
- VIR_FREE(name);
virDomainObjEndAPI(&vm);
return ret;
}
@@ -3803,7 +3769,7 @@ doCoreDump(virQEMUDriverPtr driver,
unsigned int flags = VIR_FILE_WRAPPER_NON_BLOCKING;
const char *memory_dump_format = NULL;
VIR_AUTOUNREF(virQEMUDriverConfigPtr) cfg = virQEMUDriverGetConfig(driver);
- char *compressedpath = NULL;
+ VIR_AUTOFREE(char *) compressedpath = NULL;
/* We reuse "save" flag for "dump" here. Then, we can support the same
* format in "save" and "dump". This path doesn't need the compression
@@ -3883,7 +3849,6 @@ doCoreDump(virQEMUDriverPtr driver,
virFileWrapperFdFree(wrapperFd);
if (ret != 0)
unlink(path);
- VIR_FREE(compressedpath);
return ret;
}
@@ -4009,7 +3974,7 @@ qemuDomainScreenshot(virDomainPtr dom,
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
qemuDomainObjPrivatePtr priv;
- char *tmp = NULL;
+ VIR_AUTOFREE(char *) tmp = NULL;
int tmp_fd = -1;
size_t i;
const char *videoAlias = NULL;
@@ -4101,7 +4066,6 @@ qemuDomainScreenshot(virDomainPtr dom,
VIR_FORCE_CLOSE(tmp_fd);
if (unlink_tmp)
unlink(tmp);
- VIR_FREE(tmp);
qemuDomainObjEndJob(driver, vm);
@@ -4115,7 +4079,7 @@ getAutoDumpPath(virQEMUDriverPtr driver,
virDomainObjPtr vm)
{
char *dumpfile = NULL;
- char *domname = virDomainDefGetShortName(vm->def);
+ VIR_AUTOFREE(char *domname) = virDomainDefGetShortName(vm->def);
char timestr[100];
struct tm time_info;
time_t curtime = time(NULL);
@@ -4134,7 +4098,6 @@ getAutoDumpPath(virQEMUDriverPtr driver,
domname,
timestr));
- VIR_FREE(domname);
return dumpfile;
}
--
2.21.0
More information about the libvir-list
mailing list