Move meminfo-writer to linux-utils repo
It is common for both dom0 and VM, and also quite linux-specific (other OSes will need other implementation). So move to linux-specific repo (not dom0-specific).
This commit is contained in:
Marek Marczykowski-Górecki
parent
994e963ab8
commit
bba989e0a6
@ -1,12 +0,0 @@
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[Unit]
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Description=Qubes memory information reporter
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After=qubes-core.service
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[Service]
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Type=simple
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ExecStart=/usr/lib/qubes/meminfo-writer 30000 100000
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StandardOutput=syslog
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RemainAfterExit=yes
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[Install]
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WantedBy=multi-user.target
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@ -1,7 +1,4 @@
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all: meminfo-writer
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meminfo-writer: meminfo-writer.o
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$(CC) -g -o meminfo-writer meminfo-writer.o -lxenstore
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all:
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clean:
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rm -f *.pyo
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@ -1,176 +0,0 @@
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#include <fcntl.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <xs.h>
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#include <syslog.h>
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#include <string.h>
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#include <signal.h>
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unsigned long prev_used_mem;
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int used_mem_change_threshold;
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int delay;
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int usr1_received;
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char *parse(char *buf)
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{
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char *ptr = buf;
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char name[256];
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static char outbuf[4096];
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int val;
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int len;
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int MemTotal = 0, MemFree = 0, Buffers = 0, Cached = 0, SwapTotal =
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0, SwapFree = 0;
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unsigned long long key;
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long used_mem, used_mem_diff;
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int nitems = 0;
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while (nitems != 6) {
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sscanf(ptr, "%s %d kB\n%n", name, &val, &len);
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key = *(unsigned long long *) ptr;
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if (key == *(unsigned long long *) "MemTotal:") {
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MemTotal = val;
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nitems++;
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} else if (key == *(unsigned long long *) "MemFree:") {
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MemFree = val;
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nitems++;
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} else if (key == *(unsigned long long *) "Buffers:") {
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Buffers = val;
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nitems++;
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} else if (key == *(unsigned long long *) "Cached: ") {
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Cached = val;
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nitems++;
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} else if (key == *(unsigned long long *) "SwapTotal:") {
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SwapTotal = val;
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nitems++;
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} else if (key == *(unsigned long long *) "SwapFree:") {
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SwapFree = val;
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nitems++;
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}
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ptr += len;
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}
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used_mem =
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MemTotal - Buffers - Cached - MemFree + SwapTotal - SwapFree;
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if (used_mem < 0)
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return NULL;
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used_mem_diff = used_mem - prev_used_mem;
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if (used_mem_diff < 0)
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used_mem_diff = -used_mem_diff;
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if (used_mem_diff > used_mem_change_threshold
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|| (used_mem > prev_used_mem && used_mem * 13 / 10 > MemTotal
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&& used_mem_diff > used_mem_change_threshold/2)) {
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prev_used_mem = used_mem;
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sprintf(outbuf,
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"MemTotal: %d kB\nMemFree: %d kB\nBuffers: %d kB\nCached: %d kB\n"
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"SwapTotal: %d kB\nSwapFree: %d kB\n", MemTotal,
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MemFree, Buffers, Cached, SwapTotal, SwapFree);
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return outbuf;
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}
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return NULL;
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}
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void usage()
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{
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fprintf(stderr,
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"usage: meminfo_writer threshold_in_kb delay_in_us [pidfile]\n");
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fprintf(stderr, " When pidfile set, meminfo-writer will:\n");
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fprintf(stderr, " - fork into background\n");
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fprintf(stderr, " - wait for SIGURS1 (in background) before starting main work\n");
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exit(1);
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}
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void send_to_qmemman(struct xs_handle *xs, char *data)
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{
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if (!xs_write(xs, XBT_NULL, "memory/meminfo", data, strlen(data))) {
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syslog(LOG_DAEMON | LOG_ERR, "error writing xenstore ?");
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exit(1);
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}
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}
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void usr1_handler(int sig) {
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usr1_received = 1;
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}
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int main(int argc, char **argv)
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{
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char buf[4096];
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int n;
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char *meminfo_data;
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int fd;
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struct xs_handle *xs;
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if (argc != 3 && argc != 4)
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usage();
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used_mem_change_threshold = atoi(argv[1]);
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delay = atoi(argv[2]);
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if (!used_mem_change_threshold || !delay)
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usage();
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if (argc == 4) {
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pid_t pid;
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sigset_t mask, oldmask;
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switch (pid = fork()) {
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case -1:
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perror("fork");
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exit(1);
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case 0:
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sigemptyset (&mask);
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sigaddset (&mask, SIGUSR1);
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/* Wait for a signal to arrive. */
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sigprocmask (SIG_BLOCK, &mask, &oldmask);
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usr1_received = 0;
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signal(SIGUSR1, usr1_handler);
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while (!usr1_received)
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sigsuspend (&oldmask);
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sigprocmask (SIG_UNBLOCK, &mask, NULL);
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break;
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default:
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fd = open(argv[3], O_CREAT | O_TRUNC | O_WRONLY, 0666);
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if (fd < 0) {
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perror("open pidfile");
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exit(1);
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}
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n = sprintf(buf, "%d\n", pid);
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if (write(fd, buf, n) != n) {
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perror("write pid");
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exit(1);
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}
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close(fd);
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exit(0);
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}
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}
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fd = open("/proc/meminfo", O_RDONLY);
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if (fd < 0) {
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perror("open meminfo");
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exit(1);
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}
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xs = xs_domain_open();
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if (!xs) {
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perror("xs_domain_open");
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exit(1);
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}
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if (argc == 3) {
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/* if not waiting for signal, fork after first info written to xenstore */
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n = pread(fd, buf, sizeof(buf), 0);
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buf[n] = 0;
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meminfo_data = parse(buf);
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if (meminfo_data)
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send_to_qmemman(xs, meminfo_data);
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if (fork() > 0)
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exit(0);
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}
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for (;;) {
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n = pread(fd, buf, sizeof(buf), 0);
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buf[n] = 0;
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meminfo_data = parse(buf);
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if (meminfo_data)
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send_to_qmemman(xs, meminfo_data);
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usleep(delay);
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}
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}
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@ -88,7 +88,6 @@ mkdir -p $RPM_BUILD_ROOT/usr/lib/systemd/system
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cp linux/systemd/qubes-block-cleaner.service $RPM_BUILD_ROOT%{_unitdir}
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cp linux/systemd/qubes-core.service $RPM_BUILD_ROOT%{_unitdir}
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cp linux/systemd/qubes-setupdvm.service $RPM_BUILD_ROOT%{_unitdir}
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cp linux/systemd/qubes-meminfo-writer.service $RPM_BUILD_ROOT%{_unitdir}
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cp linux/systemd/qubes-netvm.service $RPM_BUILD_ROOT%{_unitdir}
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cp linux/systemd/qubes-qmemman.service $RPM_BUILD_ROOT%{_unitdir}
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cp linux/systemd/qubes-vm@.service $RPM_BUILD_ROOT%{_unitdir}
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@ -132,7 +131,6 @@ cp linux/aux-tools/startup-dvm.sh $RPM_BUILD_ROOT/usr/lib/qubes
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cp linux/aux-tools/startup-misc.sh $RPM_BUILD_ROOT/usr/lib/qubes
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cp linux/aux-tools/prepare-volatile-img.sh $RPM_BUILD_ROOT/usr/lib/qubes
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cp qmemman/server.py $RPM_BUILD_ROOT/usr/lib/qubes/qmemman_daemon.py
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cp qmemman/meminfo-writer $RPM_BUILD_ROOT/usr/lib/qubes/
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cp qubes-rpc/qubes-notify-tools $RPM_BUILD_ROOT/usr/lib/qubes/
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cp qubes-rpc/qubes-notify-updates $RPM_BUILD_ROOT/usr/lib/qubes/
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cp linux/aux-tools/vusb-ctl.py $RPM_BUILD_ROOT/usr/lib/qubes/
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@ -287,7 +285,6 @@ fi
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/usr/lib/qubes/unbind-pci-device.sh
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/usr/lib/qubes/cleanup-dispvms
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/usr/lib/qubes/qmemman_daemon.py*
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/usr/lib/qubes/meminfo-writer
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/usr/lib/qubes/qfile-daemon-dvm*
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/usr/lib/qubes/qubes-notify-tools
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/usr/lib/qubes/qubes-notify-updates
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@ -302,7 +299,6 @@ fi
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%{_unitdir}/qubes-block-cleaner.service
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%{_unitdir}/qubes-core.service
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%{_unitdir}/qubes-setupdvm.service
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%{_unitdir}/qubes-meminfo-writer.service
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%{_unitdir}/qubes-netvm.service
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%{_unitdir}/qubes-qmemman.service
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%{_unitdir}/qubes-vm@.service
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