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kvm tools: Improve 'kvm balloon' parameters

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kvm balloon now uses the git option parser to parse parameters.

Added option to balloon instance by PID.

Improved usage message.

Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
This commit is contained in:
Sasha Levin
2011-08-12 18:21:00 +03:00
committed by Will Deacon
parent f3efa5929e
commit 790142ec29
1 changed files with 46 additions and 15 deletions
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builtin-balloon.c
+46 -15
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@@ -8,13 +8,29 @@
#include <kvm/parse-options.h>
#include <kvm/kvm.h>
static u64 instance_pid;
static const char *instance_name;
static u64 inflate;
static u64 deflate;
static const char * const balloon_usage[] = {
"kvm balloon {inflate|deflate} <size in MiB> <instance name>",
NULL
};
static const char * const debug_usage[] = {
"kvm balloon [-n name] [-p pid] [-i amount] [-d amount]",
NULL
};
static const struct option balloon_options[] = {
OPT_END()
OPT_GROUP("Instance options:"),
OPT_STRING('n', "name", &instance_name, "name", "Instance name"),
OPT_U64('p', "pid", &instance_pid, "Instance pid"),
OPT_GROUP("Balloon options:"),
OPT_U64('i', "inflate", &inflate, "Amount to inflate"),
OPT_U64('d', "deflate", &deflate, "Amount to deflate"),
OPT_END(),
};
void kvm_balloon_help(void)
@@ -22,28 +38,43 @@ void kvm_balloon_help(void)
usage_with_options(balloon_usage, balloon_options);
}
static void parse_balloon_options(int argc, const char **argv)
{
while (argc != 0) {
argc = parse_options(argc, argv, balloon_options, balloon_usage,
PARSE_OPT_STOP_AT_NON_OPTION);
if (argc != 0)
kvm_balloon_help();
}
}
int kvm_cmd_balloon(int argc, const char **argv, const char *prefix)
{
int pid;
int amount, i;
int inflate = 0;
u64 i;
if (argc != 3)
parse_balloon_options(argc, argv);
if (inflate == 0 && deflate == 0)
kvm_balloon_help();
pid = kvm__get_pid_by_instance(argv[2]);
if (pid < 0)
die("Failed locating instance name");
if (instance_name == NULL &&
instance_pid == 0)
kvm_balloon_help();
if (strcmp(argv[0], "inflate") == 0)
inflate = 1;
else if (strcmp(argv[0], "deflate"))
die("command can be either 'inflate' or 'deflate'");
if (instance_name)
instance_pid = kvm__get_pid_by_instance(argv[0]);
amount = atoi(argv[1]);
if (instance_pid <= 0)
die("Failed locating instance");
for (i = 0; i < amount; i++)
kill(pid, inflate ? SIGKVMADDMEM : SIGKVMDELMEM);
if (inflate)
for (i = 0; i < inflate; i++)
kill(instance_pid, SIGKVMADDMEM);
else if (deflate)
for (i = 0; i < deflate; i++)
kill(instance_pid, SIGKVMDELMEM);
else
kvm_balloon_help();
return 0;
}