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vircgroup: Extract mount options matching into function

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Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
This commit is contained in:
Pavel Hrdina 2018-06-13 18:12:18 +02:00
parent 0490a74aa1
commit 6d5b91f0f5
1 changed files with 49 additions and 35 deletions
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84
src/util/vircgroup.c
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@ -399,6 +399,33 @@ virCgroupResolveMountLink(char *mntDir,
}
static bool
virCgroupMountOptsMatchController(const char *mntOpts,
const char *typeStr)
{
const char *tmp = mntOpts;
int typeLen = strlen(typeStr);
while (tmp) {
const char *next = strchr(tmp, ',');
int len;
if (next) {
len = next - tmp;
next++;
} else {
len = strlen(tmp);
}
if (typeLen == len && STREQLEN(typeStr, tmp, len))
return true;
tmp = next;
}
return false;
}
/*
* Process /proc/mounts figuring out what controllers are
* mounted and where
@ -426,42 +453,29 @@ virCgroupDetectMountsFromFile(virCgroupPtr group,
for (i = 0; i < VIR_CGROUP_CONTROLLER_LAST; i++) {
const char *typestr = virCgroupControllerTypeToString(i);
int typelen = strlen(typestr);
char *tmp = entry.mnt_opts;
virCgroupControllerPtr controller = &group->controllers[i];
while (tmp) {
char *next = strchr(tmp, ',');
int len;
if (next) {
len = next-tmp;
next++;
} else {
len = strlen(tmp);
if (virCgroupMountOptsMatchController(entry.mnt_opts, typestr)) {
/* Note that the lines in /proc/mounts have the same
* order than the mount operations, and that there may
* be duplicates due to bind mounts. This means
* that the same mount point may be processed more than
* once. We need to save the results of the last one,
* and we need to be careful to release the memory used
* by previous processing. */
virCgroupControllerPtr controller = &group->controllers[i];
VIR_FREE(controller->mountPoint);
VIR_FREE(controller->linkPoint);
if (VIR_STRDUP(controller->mountPoint, entry.mnt_dir) < 0)
goto cleanup;
/* If it is a co-mount it has a filename like "cpu,cpuacct"
* and we must identify the symlink path */
if (checkLinks &&
virCgroupResolveMountLink(entry.mnt_dir, typestr,
controller) < 0) {
goto cleanup;
}
if (typelen == len && STREQLEN(typestr, tmp, len)) {
/* Note that the lines in /proc/mounts have the same
* order than the mount operations, and that there may
* be duplicates due to bind mounts. This means
* that the same mount point may be processed more than
* once. We need to save the results of the last one,
* and we need to be careful to release the memory used
* by previous processing. */
VIR_FREE(controller->mountPoint);
VIR_FREE(controller->linkPoint);
if (VIR_STRDUP(controller->mountPoint, entry.mnt_dir) < 0)
goto cleanup;
/* If it is a co-mount it has a filename like "cpu,cpuacct"
* and we must identify the symlink path */
if (checkLinks &&
virCgroupResolveMountLink(entry.mnt_dir, typestr,
controller) < 0) {
goto cleanup;
}
}
tmp = next;
}
}
}