Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
Documenation/laptops: rename and update hpfall.c
Dell kernel driver dell-smo8800 provides same freefall interface as hp_accel so
program hpfall.c works also on Dell laptops. So rename it to freefall.c.
Dell driver does not provide hp::hddprotect led so make sure that freefall.c
works also if hp::hddprotect does not exist in sysfs.
Additionally write info to syslog.
Signed-off-by: Pali Rohár <pali.rohar@gmail.com>
Cc: Sonal Santan <sonal.santan@gmail.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
authored by
Pali Rohár
and committed by
Linus Torvalds
3a57cc5f
0ba4f6e4
+47
-16
+2
-2
Documentation/laptops/00-INDEX
+2
-2
Documentation/laptops/00-INDEX
···
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- information on hard disk shock protection.
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dslm.c
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- Simple Disk Sleep Monitor program
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hpfall.c
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- (HP) laptop accelerometer program for disk protection.
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freefall.c
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- (HP/DELL) laptop accelerometer program for disk protection.
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laptop-mode.txt
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- how to conserve battery power using laptop-mode.
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sony-laptop.txt
+45
-14
Documentation/laptops/hpfall.c
Documentation/laptops/freefall.c
+45
-14
Documentation/laptops/hpfall.c
Documentation/laptops/freefall.c
···
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-
/* Disk protection for HP machines.
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/* Disk protection for HP/DELL machines.
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*
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* Copyright 2008 Eric Piel
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* Copyright 2009 Pavel Machek <pavel@ucw.cz>
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* Copyright 2012 Sonal Santan
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* Copyright 2014 Pali Rohár <pali.rohar@gmail.com>
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*
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* GPLv2.
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*/
···
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#include <signal.h>
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#include <sys/mman.h>
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#include <sched.h>
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#include <syslog.h>
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char unload_heads_path[64];
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static int noled;
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static char unload_heads_path[64];
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static char device_path[32];
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static const char app_name[] = "FREE FALL";
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int set_unload_heads_path(char *device)
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static int set_unload_heads_path(char *device)
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{
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char devname[64];
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if (strlen(device) <= 5 || strncmp(device, "/dev/", 5) != 0)
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return -EINVAL;
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strncpy(devname, device + 5, sizeof(devname));
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strncpy(devname, device + 5, sizeof(devname) - 1);
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strncpy(device_path, device, sizeof(device_path) - 1);
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snprintf(unload_heads_path, sizeof(unload_heads_path) - 1,
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"/sys/block/%s/device/unload_heads", devname);
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return 0;
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}
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int valid_disk(void)
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static int valid_disk(void)
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{
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int fd = open(unload_heads_path, O_RDONLY);
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if (fd < 0) {
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perror(unload_heads_path);
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return 0;
···
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return 1;
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}
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void write_int(char *path, int i)
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static void write_int(char *path, int i)
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{
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char buf[1024];
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int fd = open(path, O_RDWR);
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if (fd < 0) {
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perror("open");
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exit(1);
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}
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sprintf(buf, "%d", i);
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if (write(fd, buf, strlen(buf)) != strlen(buf)) {
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perror("write");
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exit(1);
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}
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close(fd);
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}
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-
void set_led(int on)
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static void set_led(int on)
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{
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if (noled)
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return;
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write_int("/sys/class/leds/hp::hddprotect/brightness", on);
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}
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-
void protect(int seconds)
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static void protect(int seconds)
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{
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const char *str = (seconds == 0) ? "Unparked" : "Parked";
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write_int(unload_heads_path, seconds*1000);
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syslog(LOG_INFO, "%s %s disk head\n", str, device_path);
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}
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int on_ac(void)
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static int on_ac(void)
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{
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// /sys/class/power_supply/AC0/online
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/* /sys/class/power_supply/AC0/online */
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return 1;
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}
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int lid_open(void)
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static int lid_open(void)
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{
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// /proc/acpi/button/lid/LID/state
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/* /proc/acpi/button/lid/LID/state */
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return 1;
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}
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void ignore_me(void)
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static void ignore_me(int signum)
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{
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protect(0);
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set_led(0);
···
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int main(int argc, char **argv)
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{
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int fd, ret;
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struct stat st;
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struct sched_param param;
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if (argc == 1)
···
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return EXIT_FAILURE;
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}
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-
daemon(0, 0);
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if (stat("/sys/class/leds/hp::hddprotect/brightness", &st))
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noled = 1;
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if (daemon(0, 0) != 0) {
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perror("daemon");
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return EXIT_FAILURE;
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}
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openlog(app_name, LOG_CONS | LOG_PID | LOG_NDELAY, LOG_LOCAL1);
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param.sched_priority = sched_get_priority_max(SCHED_FIFO);
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sched_setscheduler(0, SCHED_FIFO, ¶m);
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mlockall(MCL_CURRENT|MCL_FUTURE);
···
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alarm(20);
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}
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+
closelog();
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close(fd);
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return EXIT_SUCCESS;
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}