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vcpupin: improve vcpupin definition of virsh vcpupin

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When using vcpupin command, we have to speficy comma-separated list as cpulist,
but this is tedious in case the number of phsycal cpus is large.
This patch improves this by introducing special markup "-" and "^" which are
similar to XML schema of "cpuset" attribute.

The example:

 # virsh vcpupin Guest 0 0-15,^8

 is identical to

 # virsh vcpupin Guest 0 0,1,2,3,4,5,6,7,9,10,11,12,13,14,15

NOTE: The expression is sequentially evaluated, so "0-15,^8" is not identical
to "^8,0-15".

Signed-off-by: Taku Izumi <izumi.taku@jp.fujitsu.com>
This commit is contained in:
Taku Izumi 2011-06-10 15:38:55 +09:00 committed by Wen Congyang
parent d967a8bfa4
commit 2903534a30
2 changed files with 78 additions and 58 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

129
tools/virsh.c
View File

@ -2998,8 +2998,9 @@ cmdVcpupin(vshControl *ctl, const vshCmd *cmd)
bool ret = true;
unsigned char *cpumap;
int cpumaplen;
int i;
enum { expect_num, expect_num_or_comma } state;
int i, cpu, lastcpu, maxcpu;
bool unuse = false;
char *cur;
int config = vshCommandOptBool(cmd, "config");
int live = vshCommandOptBool(cmd, "live");
int current = vshCommandOptBool(cmd, "current");
@ -3055,66 +3056,74 @@ cmdVcpupin(vshControl *ctl, const vshCmd *cmd)
return false;
}
/* Check that the cpulist parameter is a comma-separated list of
* numbers and give an intelligent error message if not.
*/
if (cpulist[0] == '\0') {
vshError(ctl, "%s", _("cpulist: Invalid format. Empty string."));
virDomainFree (dom);
return false;
}
maxcpu = VIR_NODEINFO_MAXCPUS(nodeinfo);
cpumaplen = VIR_CPU_MAPLEN(maxcpu);
cpumap = vshCalloc(ctl, 0, cpumaplen);
state = expect_num;
for (i = 0; cpulist[i]; i++) {
switch (state) {
case expect_num:
if (!c_isdigit (cpulist[i])) {
vshError(ctl, _("cpulist: %s: Invalid format. Expecting "
"digit at position %d (near '%c')."),
cpulist, i, cpulist[i]);
virDomainFree (dom);
return false;
}
state = expect_num_or_comma;
break;
case expect_num_or_comma:
if (cpulist[i] == ',')
state = expect_num;
else if (!c_isdigit (cpulist[i])) {
vshError(ctl, _("cpulist: %s: Invalid format. Expecting "
"digit or comma at position %d (near '%c')."),
cpulist, i, cpulist[i]);
virDomainFree (dom);
return false;
}
/* Parse cpulist */
cur = cpulist;
if (*cur == 0)
goto parse_error;
while (*cur != 0) {
/* the char '^' denotes exclusive */
if (*cur == '^') {
cur++;
unuse = true;
}
}
if (state == expect_num) {
vshError(ctl, _("cpulist: %s: Invalid format. Trailing comma "
"at position %d."),
cpulist, i);
virDomainFree (dom);
return false;
}
cpumaplen = VIR_CPU_MAPLEN(VIR_NODEINFO_MAXCPUS(nodeinfo));
cpumap = vshCalloc(ctl, 1, cpumaplen);
do {
unsigned int cpu = atoi(cpulist);
if (cpu < VIR_NODEINFO_MAXCPUS(nodeinfo)) {
VIR_USE_CPU(cpumap, cpu);
} else {
/* parse physical CPU number */
if (!c_isdigit(*cur))
goto parse_error;
cpu = virParseNumber(&cur);
if (cpu < 0) {
goto parse_error;
}
if (cpu >= maxcpu) {
vshError(ctl, _("Physical CPU %d doesn't exist."), cpu);
VIR_FREE(cpumap);
virDomainFree(dom);
return false;
goto parse_error;
}
cpulist = strchr(cpulist, ',');
if (cpulist)
cpulist++;
} while (cpulist);
virSkipSpaces(&cur);
if ((*cur == ',') || (*cur == 0)) {
if (unuse) {
VIR_UNUSE_CPU(cpumap, cpu);
} else {
VIR_USE_CPU(cpumap, cpu);
}
} else if (*cur == '-') {
/* the char '-' denotes range */
if (unuse) {
goto parse_error;
}
cur++;
virSkipSpaces(&cur);
/* parse the end of range */
lastcpu = virParseNumber(&cur);
if (lastcpu < cpu) {
goto parse_error;
}
if (lastcpu >= maxcpu) {
vshError(ctl, _("Physical CPU %d doesn't exist."), maxcpu);
goto parse_error;
}
for (i = cpu; i <= lastcpu; i++) {
VIR_USE_CPU(cpumap, i);
}
virSkipSpaces(&cur);
}
if (*cur == ',') {
cur++;
virSkipSpaces(&cur);
unuse = false;
} else if (*cur == 0) {
break;
} else {
goto parse_error;
}
}
if (flags == -1) {
if (virDomainPinVcpu(dom, vcpu, cpumap, cpumaplen) != 0) {
@ -3126,9 +3135,15 @@ cmdVcpupin(vshControl *ctl, const vshCmd *cmd)
}
}
cleanup:
VIR_FREE(cpumap);
virDomainFree(dom);
return ret;
parse_error:
vshError(ctl, "%s", _("cpulist: Invalid format."));
ret = false;
goto cleanup;
}
/*

7
tools/virsh.pod
View File

@ -833,13 +833,18 @@ vCPUs, the running time, the affinity to physical processors.
I<--current>
Pin domain VCPUs to host physical CPUs. The I<vcpu> number must be provided
and I<cpulist> is a comma separated list of physical CPU numbers.
and I<cpulist> is a list of physical CPU numbers. Its syntax is a comma
separated list and a special markup using '-' and '^' (ex. '0-4', '0-3,^2') can
also be allowed. The '-' denotes the range and the '^' denotes exclusive.
If I<--live> is specified, affect a running guest.
If I<--config> is specified, affect the next boot of a persistent guest.
If I<--current> is specified, affect the current guest state.
Both I<--live> and I<--config> flags may be given, but I<--current> is exclusive.
If no flag is specified, behavior is different depending on hypervisor.
B<Note>: The expression is sequentially evaluated, so "0-15,^8" is not identical
to "^8,0-15".
=item B<vncdisplay> I<domain-id>
Output the IP address and port number for the VNC display. If the information