- information on hard disk shock protection.
dslm.c
- Simple Disk Sleep Monitor program
-freefall.c
- - (HP/DELL) laptop accelerometer program for disk protection.
laptop-mode.txt
- how to conserve battery power using laptop-mode.
sony-laptop.txt
# List of programs to build
-hostprogs-y := dslm freefall
+hostprogs-y := dslm
# Tell kbuild to always build the programs
always := $(hostprogs-y)
+++ /dev/null
-/* Disk protection for HP/DELL machines.
- *
- * Copyright 2008 Eric Piel
- * Copyright 2009 Pavel Machek <pavel@ucw.cz>
- * Copyright 2012 Sonal Santan
- * Copyright 2014 Pali Rohár <pali.rohar@gmail.com>
- *
- * GPLv2.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <string.h>
-#include <stdint.h>
-#include <errno.h>
-#include <signal.h>
-#include <sys/mman.h>
-#include <sched.h>
-#include <syslog.h>
-
-static int noled;
-static char unload_heads_path[64];
-static char device_path[32];
-static const char app_name[] = "FREE FALL";
-
-static int set_unload_heads_path(char *device)
-{
- if (strlen(device) <= 5 || strncmp(device, "/dev/", 5) != 0)
- return -EINVAL;
- strncpy(device_path, device, sizeof(device_path) - 1);
-
- snprintf(unload_heads_path, sizeof(unload_heads_path) - 1,
- "/sys/block/%s/device/unload_heads", device+5);
- return 0;
-}
-
-static int valid_disk(void)
-{
- int fd = open(unload_heads_path, O_RDONLY);
-
- if (fd < 0) {
- perror(unload_heads_path);
- return 0;
- }
-
- close(fd);
- return 1;
-}
-
-static void write_int(char *path, int i)
-{
- char buf[1024];
- int fd = open(path, O_RDWR);
-
- if (fd < 0) {
- perror("open");
- exit(1);
- }
-
- sprintf(buf, "%d", i);
-
- if (write(fd, buf, strlen(buf)) != strlen(buf)) {
- perror("write");
- exit(1);
- }
-
- close(fd);
-}
-
-static void set_led(int on)
-{
- if (noled)
- return;
- write_int("/sys/class/leds/hp::hddprotect/brightness", on);
-}
-
-static void protect(int seconds)
-{
- const char *str = (seconds == 0) ? "Unparked" : "Parked";
-
- write_int(unload_heads_path, seconds*1000);
- syslog(LOG_INFO, "%s %s disk head\n", str, device_path);
-}
-
-static int on_ac(void)
-{
- /* /sys/class/power_supply/AC0/online */
- return 1;
-}
-
-static int lid_open(void)
-{
- /* /proc/acpi/button/lid/LID/state */
- return 1;
-}
-
-static void ignore_me(int signum)
-{
- protect(0);
- set_led(0);
-}
-
-int main(int argc, char **argv)
-{
- int fd, ret;
- struct stat st;
- struct sched_param param;
-
- if (argc == 1)
- ret = set_unload_heads_path("/dev/sda");
- else if (argc == 2)
- ret = set_unload_heads_path(argv[1]);
- else
- ret = -EINVAL;
-
- if (ret || !valid_disk()) {
- fprintf(stderr, "usage: %s <device> (default: /dev/sda)\n",
- argv[0]);
- exit(1);
- }
-
- fd = open("/dev/freefall", O_RDONLY);
- if (fd < 0) {
- perror("/dev/freefall");
- return EXIT_FAILURE;
- }
-
- if (stat("/sys/class/leds/hp::hddprotect/brightness", &st))
- noled = 1;
-
- if (daemon(0, 0) != 0) {
- perror("daemon");
- return EXIT_FAILURE;
- }
-
- openlog(app_name, LOG_CONS | LOG_PID | LOG_NDELAY, LOG_LOCAL1);
-
- param.sched_priority = sched_get_priority_max(SCHED_FIFO);
- sched_setscheduler(0, SCHED_FIFO, ¶m);
- mlockall(MCL_CURRENT|MCL_FUTURE);
-
- signal(SIGALRM, ignore_me);
-
- for (;;) {
- unsigned char count;
-
- ret = read(fd, &count, sizeof(count));
- alarm(0);
- if ((ret == -1) && (errno == EINTR)) {
- /* Alarm expired, time to unpark the heads */
- continue;
- }
-
- if (ret != sizeof(count)) {
- perror("read");
- break;
- }
-
- protect(21);
- set_led(1);
- if (1 || on_ac() || lid_open())
- alarm(2);
- else
- alarm(20);
- }
-
- closelog();
- close(fd);
- return EXIT_SUCCESS;
-}
@echo ' vm - misc vm tools'
@echo ' x86_energy_perf_policy - Intel energy policy tool'
@echo ' tmon - thermal monitoring and tuning tool'
+ @echo ' freefall - laptop accelerometer program for disk protection'
@echo ''
@echo 'You can do:'
@echo ' $$ make -C tools/ <tool>_install'
tmon: FORCE
$(call descend,thermal/$@)
+freefall: FORCE
+ $(call descend,laptop/$@)
+
acpi_install:
$(call descend,power/$(@:_install=),install)
tmon_install:
$(call descend,thermal/$(@:_install=),install)
+freefall_install:
+ $(call descend,laptop/$(@:_install=),install)
+
install: acpi_install cgroup_install cpupower_install hv_install firewire_install lguest_install \
perf_install selftests_install turbostat_install usb_install \
virtio_install vm_install net_install x86_energy_perf_policy_install \
- tmon
+ tmon freefall_install
acpi_clean:
$(call descend,power/acpi,clean)
tmon_clean:
$(call descend,thermal/tmon,clean)
+freefall_clean:
+ $(call descend,laptop/freefall,clean)
+
clean: acpi_clean cgroup_clean cpupower_clean hv_clean firewire_clean lguest_clean \
perf_clean selftests_clean turbostat_clean usb_clean virtio_clean \
- vm_clean net_clean x86_energy_perf_policy_clean tmon_clean
+ vm_clean net_clean x86_energy_perf_policy_clean tmon_clean freefall_clean
.PHONY: FORCE
--- /dev/null
+PREFIX ?= /usr
+SBINDIR ?= sbin
+INSTALL ?= install
+CC = $(CROSS_COMPILE)gcc
+
+TARGET = freefall
+
+all: $(TARGET)
+
+%: %.c
+ $(CC) $(CFLAGS) $(LDFLAGS) -o $@ $<
+
+clean:
+ $(RM) $(TARGET)
+
+install: freefall
+ $(INSTALL) -D -m 755 $(TARGET) $(DESTDIR)$(PREFIX)/$(SBINDIR)/$(TARGET)
--- /dev/null
+/* Disk protection for HP/DELL machines.
+ *
+ * Copyright 2008 Eric Piel
+ * Copyright 2009 Pavel Machek <pavel@ucw.cz>
+ * Copyright 2012 Sonal Santan
+ * Copyright 2014 Pali Rohár <pali.rohar@gmail.com>
+ *
+ * GPLv2.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <string.h>
+#include <stdint.h>
+#include <errno.h>
+#include <signal.h>
+#include <sys/mman.h>
+#include <sched.h>
+#include <syslog.h>
+
+static int noled;
+static char unload_heads_path[64];
+static char device_path[32];
+static const char app_name[] = "FREE FALL";
+
+static int set_unload_heads_path(char *device)
+{
+ if (strlen(device) <= 5 || strncmp(device, "/dev/", 5) != 0)
+ return -EINVAL;
+ strncpy(device_path, device, sizeof(device_path) - 1);
+
+ snprintf(unload_heads_path, sizeof(unload_heads_path) - 1,
+ "/sys/block/%s/device/unload_heads", device+5);
+ return 0;
+}
+
+static int valid_disk(void)
+{
+ int fd = open(unload_heads_path, O_RDONLY);
+
+ if (fd < 0) {
+ perror(unload_heads_path);
+ return 0;
+ }
+
+ close(fd);
+ return 1;
+}
+
+static void write_int(char *path, int i)
+{
+ char buf[1024];
+ int fd = open(path, O_RDWR);
+
+ if (fd < 0) {
+ perror("open");
+ exit(1);
+ }
+
+ sprintf(buf, "%d", i);
+
+ if (write(fd, buf, strlen(buf)) != strlen(buf)) {
+ perror("write");
+ exit(1);
+ }
+
+ close(fd);
+}
+
+static void set_led(int on)
+{
+ if (noled)
+ return;
+ write_int("/sys/class/leds/hp::hddprotect/brightness", on);
+}
+
+static void protect(int seconds)
+{
+ const char *str = (seconds == 0) ? "Unparked" : "Parked";
+
+ write_int(unload_heads_path, seconds*1000);
+ syslog(LOG_INFO, "%s %s disk head\n", str, device_path);
+}
+
+static int on_ac(void)
+{
+ /* /sys/class/power_supply/AC0/online */
+ return 1;
+}
+
+static int lid_open(void)
+{
+ /* /proc/acpi/button/lid/LID/state */
+ return 1;
+}
+
+static void ignore_me(int signum)
+{
+ protect(0);
+ set_led(0);
+}
+
+int main(int argc, char **argv)
+{
+ int fd, ret;
+ struct stat st;
+ struct sched_param param;
+
+ if (argc == 1)
+ ret = set_unload_heads_path("/dev/sda");
+ else if (argc == 2)
+ ret = set_unload_heads_path(argv[1]);
+ else
+ ret = -EINVAL;
+
+ if (ret || !valid_disk()) {
+ fprintf(stderr, "usage: %s <device> (default: /dev/sda)\n",
+ argv[0]);
+ exit(1);
+ }
+
+ fd = open("/dev/freefall", O_RDONLY);
+ if (fd < 0) {
+ perror("/dev/freefall");
+ return EXIT_FAILURE;
+ }
+
+ if (stat("/sys/class/leds/hp::hddprotect/brightness", &st))
+ noled = 1;
+
+ if (daemon(0, 0) != 0) {
+ perror("daemon");
+ return EXIT_FAILURE;
+ }
+
+ openlog(app_name, LOG_CONS | LOG_PID | LOG_NDELAY, LOG_LOCAL1);
+
+ param.sched_priority = sched_get_priority_max(SCHED_FIFO);
+ sched_setscheduler(0, SCHED_FIFO, ¶m);
+ mlockall(MCL_CURRENT|MCL_FUTURE);
+
+ signal(SIGALRM, ignore_me);
+
+ for (;;) {
+ unsigned char count;
+
+ ret = read(fd, &count, sizeof(count));
+ alarm(0);
+ if ((ret == -1) && (errno == EINTR)) {
+ /* Alarm expired, time to unpark the heads */
+ continue;
+ }
+
+ if (ret != sizeof(count)) {
+ perror("read");
+ break;
+ }
+
+ protect(21);
+ set_led(1);
+ if (1 || on_ac() || lid_open())
+ alarm(2);
+ else
+ alarm(20);
+ }
+
+ closelog();
+ close(fd);
+ return EXIT_SUCCESS;
+}
projects / linux-2.6-block.git / commitdiff