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lxcProcReadMeminfo: Drop @new_meminfo variable

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In the lxcProcReadMeminfo() function we have @buffer variable
which is statically allocated and then @new_meminfo which is just
a pointer to the @buffer. This is needless, the @buffer can be
accessed directly.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This commit is contained in:
Michal Privoznik 2022-02-28 15:29:58 +01:00
parent 477ae0b868
commit 2de984a26e
1 changed files with 20 additions and 21 deletions
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41
src/lxc/lxc_fuse.c
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@ -152,7 +152,6 @@ lxcProcReadMeminfo(char *hostpath,
size_t n;
struct virLXCMeminfo meminfo;
g_auto(virBuffer) buffer = VIR_BUFFER_INITIALIZER;
virBuffer *new_meminfo = &buffer;
if (virLXCCgroupGetMeminfo(&meminfo) < 0) {
virErrorSetErrnoFromLastError();
@ -180,12 +179,12 @@ lxcProcReadMeminfo(char *hostpath,
if (STREQ(line, "MemTotal") &&
(virMemoryLimitIsSet(def->mem.hard_limit) ||
virDomainDefGetMemoryTotal(def))) {
virBufferAsprintf(new_meminfo, "MemTotal: %8llu kB\n",
virBufferAsprintf(&buffer, "MemTotal: %8llu kB\n",
meminfo.memtotal);
} else if (STREQ(line, "MemFree") &&
(virMemoryLimitIsSet(def->mem.hard_limit) ||
virDomainDefGetMemoryTotal(def))) {
virBufferAsprintf(new_meminfo, "MemFree: %8llu kB\n",
virBufferAsprintf(&buffer, "MemFree: %8llu kB\n",
(meminfo.memtotal - meminfo.memusage));
} else if (STREQ(line, "MemAvailable") &&
(virMemoryLimitIsSet(def->mem.hard_limit) ||
@ -193,59 +192,59 @@ lxcProcReadMeminfo(char *hostpath,
/* MemAvailable is actually MemFree + SRReclaimable +
some other bits, but MemFree is the closest approximation
we have */
virBufferAsprintf(new_meminfo, "MemAvailable: %8llu kB\n",
virBufferAsprintf(&buffer, "MemAvailable: %8llu kB\n",
(meminfo.memtotal - meminfo.memusage));
} else if (STREQ(line, "Buffers")) {
virBufferAsprintf(new_meminfo, "Buffers: %8d kB\n", 0);
virBufferAsprintf(&buffer, "Buffers: %8d kB\n", 0);
} else if (STREQ(line, "Cached")) {
virBufferAsprintf(new_meminfo, "Cached: %8llu kB\n",
virBufferAsprintf(&buffer, "Cached: %8llu kB\n",
meminfo.cached);
} else if (STREQ(line, "Active")) {
virBufferAsprintf(new_meminfo, "Active: %8llu kB\n",
virBufferAsprintf(&buffer, "Active: %8llu kB\n",
(meminfo.active_anon + meminfo.active_file));
} else if (STREQ(line, "Inactive")) {
virBufferAsprintf(new_meminfo, "Inactive: %8llu kB\n",
virBufferAsprintf(&buffer, "Inactive: %8llu kB\n",
(meminfo.inactive_anon + meminfo.inactive_file));
} else if (STREQ(line, "Active(anon)")) {
virBufferAsprintf(new_meminfo, "Active(anon): %8llu kB\n",
virBufferAsprintf(&buffer, "Active(anon): %8llu kB\n",
meminfo.active_anon);
} else if (STREQ(line, "Inactive(anon)")) {
virBufferAsprintf(new_meminfo, "Inactive(anon): %8llu kB\n",
virBufferAsprintf(&buffer, "Inactive(anon): %8llu kB\n",
meminfo.inactive_anon);
} else if (STREQ(line, "Active(file)")) {
virBufferAsprintf(new_meminfo, "Active(file): %8llu kB\n",
virBufferAsprintf(&buffer, "Active(file): %8llu kB\n",
meminfo.active_file);
} else if (STREQ(line, "Inactive(file)")) {
virBufferAsprintf(new_meminfo, "Inactive(file): %8llu kB\n",
virBufferAsprintf(&buffer, "Inactive(file): %8llu kB\n",
meminfo.inactive_file);
} else if (STREQ(line, "Unevictable")) {
virBufferAsprintf(new_meminfo, "Unevictable: %8llu kB\n",
virBufferAsprintf(&buffer, "Unevictable: %8llu kB\n",
meminfo.unevictable);
} else if (STREQ(line, "SwapTotal") &&
virMemoryLimitIsSet(def->mem.swap_hard_limit)) {
virBufferAsprintf(new_meminfo, "SwapTotal: %8llu kB\n",
virBufferAsprintf(&buffer, "SwapTotal: %8llu kB\n",
(meminfo.swaptotal - meminfo.memtotal));
} else if (STREQ(line, "SwapFree") &&
virMemoryLimitIsSet(def->mem.swap_hard_limit)) {
virBufferAsprintf(new_meminfo, "SwapFree: %8llu kB\n",
virBufferAsprintf(&buffer, "SwapFree: %8llu kB\n",
(meminfo.swaptotal - meminfo.memtotal -
meminfo.swapusage + meminfo.memusage));
} else if (STREQ(line, "Slab")) {
virBufferAsprintf(new_meminfo, "Slab: %8d kB\n", 0);
virBufferAsprintf(&buffer, "Slab: %8d kB\n", 0);
} else if (STREQ(line, "SReclaimable")) {
virBufferAsprintf(new_meminfo, "SReclaimable: %8d kB\n", 0);
virBufferAsprintf(&buffer, "SReclaimable: %8d kB\n", 0);
} else if (STREQ(line, "SUnreclaim")) {
virBufferAsprintf(new_meminfo, "SUnreclaim: %8d kB\n", 0);
virBufferAsprintf(&buffer, "SUnreclaim: %8d kB\n", 0);
} else {
*ptr = ':';
virBufferAdd(new_meminfo, line, -1);
virBufferAdd(&buffer, line, -1);
}
}
res = strlen(virBufferCurrentContent(new_meminfo));
res = strlen(virBufferCurrentContent(&buffer));
if (res > size)
res = size;
memcpy(buf, virBufferCurrentContent(new_meminfo), res);
memcpy(buf, virBufferCurrentContent(&buffer), res);
return res;
}