mirror of
https://gitlab.com/libvirt/libvirt.git
synced 2024-12-22 13:45:38 +00:00
openvz: Remove several larger stack allocations
Replace openvz_readline with getline in several places to get rid of stack allocated buffers to hold lines. openvzReadConfigParam allocates memory for return values instead of expecting a preexisting buffer.
This commit is contained in:
Matthias Bolte
parent
76f0ae3261
commit
f044376530
@ -187,7 +187,7 @@ openvzReadNetworkConf(virDomainDefPtr def,
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int veid) {
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int ret;
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virDomainNetDefPtr net = NULL;
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char temp[4096];
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char *temp = NULL;
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char *token, *saveptr = NULL;
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/*parse routing network configuration*
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@ -195,7 +195,7 @@ openvzReadNetworkConf(virDomainDefPtr def,
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* IP_ADDRESS="1.1.1.1 1.1.1.2"
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* splited IPs by space
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*/
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ret = openvzReadVPSConfigParam(veid, "IP_ADDRESS", temp, sizeof(temp));
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ret = openvzReadVPSConfigParam(veid, "IP_ADDRESS", &temp);
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if (ret < 0) {
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openvzError(VIR_ERR_INTERNAL_ERROR,
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_("Could not read 'IP_ADDRESS' from config for container %d"),
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@ -227,7 +227,7 @@ openvzReadNetworkConf(virDomainDefPtr def,
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*NETIF="ifname=eth10,mac=00:18:51:C1:05:EE,host_ifname=veth105.10,host_mac=00:18:51:8F:D9:F3"
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*devices splited by ';'
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*/
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ret = openvzReadVPSConfigParam(veid, "NETIF", temp, sizeof(temp));
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ret = openvzReadVPSConfigParam(veid, "NETIF", &temp);
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if (ret < 0) {
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openvzError(VIR_ERR_INTERNAL_ERROR,
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_("Could not read 'NETIF' from config for container %d"),
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@ -316,10 +316,13 @@ openvzReadNetworkConf(virDomainDefPtr def,
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}
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}
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VIR_FREE(temp);
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return 0;
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no_memory:
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virReportOOMError();
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error:
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VIR_FREE(temp);
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virDomainNetDefFree(net);
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return -1;
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}
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@ -365,9 +368,9 @@ openvzReadFSConf(virDomainDefPtr def,
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int ret;
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virDomainFSDefPtr fs = NULL;
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char *veid_str = NULL;
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char temp[100];
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char *temp = NULL;
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ret = openvzReadVPSConfigParam(veid, "OSTEMPLATE", temp, sizeof(temp));
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ret = openvzReadVPSConfigParam(veid, "OSTEMPLATE", &temp);
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if (ret < 0) {
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openvzError(VIR_ERR_INTERNAL_ERROR,
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_("Could not read 'OSTEMPLATE' from config for container %d"),
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@ -381,7 +384,7 @@ openvzReadFSConf(virDomainDefPtr def,
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fs->src = strdup(temp);
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} else {
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/* OSTEMPLATE was not found, VE was booted from a private dir directly */
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ret = openvzReadVPSConfigParam(veid, "VE_PRIVATE", temp, sizeof(temp));
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ret = openvzReadVPSConfigParam(veid, "VE_PRIVATE", &temp);
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if (ret <= 0) {
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openvzError(VIR_ERR_INTERNAL_ERROR,
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_("Could not read 'VE_PRIVATE' from config for container %d"),
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@ -411,10 +414,13 @@ openvzReadFSConf(virDomainDefPtr def,
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def->fss[def->nfss++] = fs;
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fs = NULL;
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VIR_FREE(temp);
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return 0;
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no_memory:
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virReportOOMError();
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error:
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VIR_FREE(temp);
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virDomainFSDefFree(fs);
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return -1;
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}
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@ -439,7 +445,7 @@ int openvzLoadDomains(struct openvz_driver *driver) {
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char *status;
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char uuidstr[VIR_UUID_STRING_BUFLEN];
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virDomainObjPtr dom = NULL;
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char temp[50];
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char *temp = NULL;
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char *outbuf = NULL;
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char *line;
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virCommandPtr cmd = NULL;
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@ -506,7 +512,7 @@ int openvzLoadDomains(struct openvz_driver *driver) {
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if (!(dom->def->os.init = strdup("/sbin/init")))
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goto no_memory;
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ret = openvzReadVPSConfigParam(veid, "CPUS", temp, sizeof(temp));
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ret = openvzReadVPSConfigParam(veid, "CPUS", &temp);
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if (ret < 0) {
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openvzError(VIR_ERR_INTERNAL_ERROR,
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_("Could not read config for container %d"),
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@ -534,6 +540,7 @@ int openvzLoadDomains(struct openvz_driver *driver) {
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}
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virCommandFree(cmd);
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VIR_FREE(temp);
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VIR_FREE(outbuf);
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return 0;
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@ -543,6 +550,7 @@ int openvzLoadDomains(struct openvz_driver *driver) {
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cleanup:
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virCommandFree(cmd);
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VIR_FREE(temp);
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VIR_FREE(outbuf);
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/* dom hasn't been shared yet, so unref should return 0 */
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if (dom)
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@ -565,25 +573,26 @@ static int
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openvzWriteConfigParam(const char * conf_file, const char *param, const char *value)
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{
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char * temp_file = NULL;
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int fd = -1, temp_fd = -1;
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char line[PATH_MAX];
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int temp_fd = -1;
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FILE *fp;
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char *line = NULL;
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size_t line_size = 0;
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if (virAsprintf(&temp_file, "%s.tmp", conf_file)<0) {
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virReportOOMError();
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return -1;
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}
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fd = open(conf_file, O_RDONLY);
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if (fd == -1)
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fp = fopen(conf_file, "r");
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if (fp == NULL)
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goto error;
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temp_fd = open(temp_file, O_WRONLY | O_CREAT | O_TRUNC, 0644);
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if (temp_fd == -1) {
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VIR_FORCE_CLOSE(fd);
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goto error;
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}
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while (1) {
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if (openvz_readline(fd, line, sizeof(line)) <= 0)
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if (getline(&line, &line_size, fp) <= 0)
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break;
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if (!(STRPREFIX(line, param) && line[strlen(param)] == '=')) {
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@ -599,7 +608,7 @@ openvzWriteConfigParam(const char * conf_file, const char *param, const char *va
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safewrite(temp_fd, "\"\n", 2) < 0)
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goto error;
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if (VIR_CLOSE(fd) < 0)
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if (VIR_FCLOSE(fp) < 0)
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goto error;
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if (VIR_CLOSE(temp_fd) < 0)
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goto error;
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@ -607,10 +616,13 @@ openvzWriteConfigParam(const char * conf_file, const char *param, const char *va
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if (rename(temp_file, conf_file) < 0)
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goto error;
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VIR_FREE(line);
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return 0;
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error:
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VIR_FORCE_CLOSE(fd);
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VIR_FREE(line);
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VIR_FORCE_FCLOSE(fp);
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VIR_FORCE_CLOSE(temp_fd);
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if (temp_file)
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unlink(temp_file);
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@ -632,23 +644,29 @@ openvzWriteVPSConfigParam(int vpsid, const char *param, const char *value)
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return ret;
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}
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/*
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* value will be freed before a new value is assigned to it, the caller is
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* responsible for freeing it afterwards.
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*/
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static int
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openvzReadConfigParam(const char * conf_file ,const char * param, char *value, int maxlen)
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openvzReadConfigParam(const char *conf_file, const char *param, char **value)
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{
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char line[PATH_MAX];
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int ret, found = 0;
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int fd;
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char *line = NULL;
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size_t line_size = 0;
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ssize_t ret;
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FILE *fp;
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int found = 0;
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char *sf, *token;
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char *saveptr = NULL;
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value[0] = 0;
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fd = open(conf_file, O_RDONLY);
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if (fd == -1)
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fp = fopen(conf_file, "r");
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if (fp == NULL)
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return -1;
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while (1) {
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ret = openvz_readline(fd, line, sizeof(line));
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ret = getline(&line, &line_size, fp);
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if (ret <= 0)
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break;
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saveptr = NULL;
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@ -658,7 +676,9 @@ openvzReadConfigParam(const char * conf_file ,const char * param, char *value, i
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if (sf[0] == '=' && sf[1] != '\0' ) {
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sf++;
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if ((token = strtok_r(sf,"\"\t\n", &saveptr)) != NULL) {
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if (virStrcpy(value, token, maxlen) == NULL) {
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VIR_FREE(*value);
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*value = strdup(token);
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if (value == NULL) {
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ret = -1;
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break;
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}
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@ -667,7 +687,8 @@ openvzReadConfigParam(const char * conf_file ,const char * param, char *value, i
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}
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}
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}
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VIR_FORCE_CLOSE(fd);
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VIR_FREE(line);
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VIR_FORCE_FCLOSE(fp);
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if (ret == 0 && found)
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ret = 1;
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@ -677,13 +698,17 @@ openvzReadConfigParam(const char * conf_file ,const char * param, char *value, i
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/*
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* Read parameter from container config
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* sample: 133, "OSTEMPLATE", value, 1024
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*
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* value will be freed before a new value is assined to it, the caller is
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* responsible for freeing it afterwards.
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*
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* sample: 133, "OSTEMPLATE", &value
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* return: -1 - error
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* 0 - don't found
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* 1 - OK
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*/
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int
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openvzReadVPSConfigParam(int vpsid ,const char * param, char *value, int maxlen)
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openvzReadVPSConfigParam(int vpsid, const char *param, char **value)
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{
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char *conf_file;
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int ret;
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@ -691,7 +716,7 @@ openvzReadVPSConfigParam(int vpsid ,const char * param, char *value, int maxlen)
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if (openvzLocateConfFile(vpsid, &conf_file, "conf") < 0)
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return -1;
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ret = openvzReadConfigParam(conf_file, param, value, maxlen);
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ret = openvzReadConfigParam(conf_file, param, value);
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VIR_FREE(conf_file);
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return ret;
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}
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@ -699,21 +724,23 @@ openvzReadVPSConfigParam(int vpsid ,const char * param, char *value, int maxlen)
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static int
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openvz_copyfile(char* from_path, char* to_path)
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{
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char line[PATH_MAX];
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int fd, copy_fd;
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char *line = NULL;
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size_t line_size = 0;
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FILE *fp;
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int copy_fd;
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int bytes_read;
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fd = open(from_path, O_RDONLY);
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if (fd == -1)
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fp = fopen(from_path, "r");
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if (fp == NULL)
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return -1;
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copy_fd = open(to_path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
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if (copy_fd == -1) {
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VIR_FORCE_CLOSE(fd);
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VIR_FORCE_FCLOSE(fp);
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return -1;
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}
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while (1) {
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if (openvz_readline(fd, line, sizeof(line)) <= 0)
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if (getline(&line, &line_size, fp) <= 0)
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break;
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bytes_read = strlen(line);
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@ -721,15 +748,18 @@ openvz_copyfile(char* from_path, char* to_path)
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goto error;
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}
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if (VIR_CLOSE(fd) < 0)
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if (VIR_FCLOSE(fp) < 0)
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goto error;
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if (VIR_CLOSE(copy_fd) < 0)
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goto error;
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VIR_FREE(line);
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return 0;
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error:
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VIR_FORCE_CLOSE(fd);
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VIR_FREE(line);
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VIR_FORCE_FCLOSE(fp);
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VIR_FORCE_CLOSE(copy_fd);
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return -1;
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}
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@ -744,12 +774,11 @@ openvzCopyDefaultConfig(int vpsid)
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{
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char *confdir = NULL;
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char *default_conf_file = NULL;
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char configfile_value[PATH_MAX];
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char *configfile_value = NULL;
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char *conf_file = NULL;
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int ret = -1;
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if (openvzReadConfigParam(VZ_CONF_FILE, "CONFIGFILE", configfile_value,
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PATH_MAX) < 0)
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if (openvzReadConfigParam(VZ_CONF_FILE, "CONFIGFILE", &configfile_value) < 0)
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goto cleanup;
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confdir = openvzLocateConfDir();
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@ -772,6 +801,7 @@ openvzCopyDefaultConfig(int vpsid)
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cleanup:
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VIR_FREE(confdir);
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VIR_FREE(default_conf_file);
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VIR_FREE(configfile_value);
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VIR_FREE(conf_file);
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return ret;
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}
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@ -844,22 +874,24 @@ static int
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openvzGetVPSUUID(int vpsid, char *uuidstr, size_t len)
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{
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char *conf_file;
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char line[1024];
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char *line = NULL;
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size_t line_size = 0;
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ssize_t ret;
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char *saveptr = NULL;
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char *uuidbuf;
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char *iden;
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int fd, ret;
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FILE *fp;
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int retval = -1;
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if (openvzLocateConfFile(vpsid, &conf_file, "conf") < 0)
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return -1;
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fd = open(conf_file, O_RDONLY);
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if (fd == -1)
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fp = fopen(conf_file, "r");
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if (fp == NULL)
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goto cleanup;
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while (1) {
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ret = openvz_readline(fd, line, sizeof(line));
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ret = getline(&line, &line_size, fp);
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if (ret == -1)
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goto cleanup;
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@ -882,7 +914,8 @@ openvzGetVPSUUID(int vpsid, char *uuidstr, size_t len)
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}
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retval = 0;
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cleanup:
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VIR_FORCE_CLOSE(fd);
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VIR_FREE(line);
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VIR_FORCE_FCLOSE(fp);
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VIR_FREE(conf_file);
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return retval;
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@ -55,7 +55,7 @@ struct openvz_driver {
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int openvz_readline(int fd, char *ptr, int maxlen);
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int openvzExtractVersion(struct openvz_driver *driver);
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int openvzReadVPSConfigParam(int vpsid ,const char * param, char *value, int maxlen);
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int openvzReadVPSConfigParam(int vpsid, const char *param, char **value);
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int openvzWriteVPSConfigParam(int vpsid, const char *param, const char *value);
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int openvzCopyDefaultConfig(int vpsid);
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virCapsPtr openvzCapsInit(void);
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@ -631,11 +631,12 @@ openvzGenerateVethName(int veid, char *dev_name_ve)
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static char *
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openvzGenerateContainerVethName(int veid)
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{
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char temp[1024];
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char *temp = NULL;
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char *name = NULL;
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/* try to get line "^NETIF=..." from config */
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if (openvzReadVPSConfigParam(veid, "NETIF", temp, sizeof(temp)) <= 0) {
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snprintf(temp, sizeof(temp), "eth0");
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if (openvzReadVPSConfigParam(veid, "NETIF", &temp) <= 0) {
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name = strdup("eth0");
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} else {
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char *saveptr;
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char *s;
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@ -650,9 +651,16 @@ openvzGenerateContainerVethName(int veid)
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}
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/* set new name */
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snprintf(temp, sizeof(temp), "eth%d", max+1);
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virAsprintf(&name, "eth%d", max + 1);
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}
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return strdup(temp);
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VIR_FREE(temp);
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if (name == NULL) {
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virReportOOMError();
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}
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return name;
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}
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static int
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@ -1125,7 +1133,7 @@ openvzDomainGetAutostart(virDomainPtr dom, int *autostart)
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{
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struct openvz_driver *driver = dom->conn->privateData;
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virDomainObjPtr vm;
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char value[1024];
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char *value = NULL;
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int ret = -1;
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openvzDriverLock(driver);
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@ -1138,7 +1146,7 @@ openvzDomainGetAutostart(virDomainPtr dom, int *autostart)
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goto cleanup;
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}
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if (openvzReadVPSConfigParam(strtoI(vm->def->name), "ONBOOT", value, sizeof(value)) < 0) {
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if (openvzReadVPSConfigParam(strtoI(vm->def->name), "ONBOOT", &value) < 0) {
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openvzError(VIR_ERR_INTERNAL_ERROR, "%s",
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_("Could not read container config"));
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goto cleanup;
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@ -1150,6 +1158,8 @@ openvzDomainGetAutostart(virDomainPtr dom, int *autostart)
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ret = 0;
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cleanup:
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VIR_FREE(value);
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if (vm)
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virDomainObjUnlock(vm);
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return ret;
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@ -1464,12 +1474,14 @@ out:
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return -1;
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}
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static int openvzGetProcessInfo(unsigned long long *cpuTime, int vpsid) {
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int fd;
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char line[1024] ;
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static int openvzGetProcessInfo(unsigned long long *cpuTime, int vpsid)
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{
|
||||
FILE *fp;
|
||||
char *line = NULL;
|
||||
size_t line_size = 0;
|
||||
unsigned long long usertime, systime, nicetime;
|
||||
int readvps = vpsid + 1; /* ensure readvps is initially different */
|
||||
int ret;
|
||||
ssize_t ret;
|
||||
|
||||
/* read statistic from /proc/vz/vestat.
|
||||
sample:
|
||||
@ -1479,12 +1491,12 @@ Version: 2.2
|
||||
55 178 0 5340 59424597 542650441835148 other..
|
||||
*/
|
||||
|
||||
if ((fd = open("/proc/vz/vestat", O_RDONLY)) == -1)
|
||||
if ((fp = fopen("/proc/vz/vestat", "r")) == NULL)
|
||||
return -1;
|
||||
|
||||
/*search line with VEID=vpsid*/
|
||||
while (1) {
|
||||
ret = openvz_readline(fd, line, sizeof(line));
|
||||
ret = getline(&line, &line_size, fp);
|
||||
if (ret <= 0)
|
||||
break;
|
||||
|
||||
@ -1499,7 +1511,8 @@ Version: 2.2
|
||||
}
|
||||
}
|
||||
|
||||
VIR_FORCE_CLOSE(fd);
|
||||
VIR_FREE(line);
|
||||
VIR_FORCE_FCLOSE(fp);
|
||||
if (ret < 0)
|
||||
return -1;
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user