From 10a0a8d4e3f6bf2d077f94344441909abe670f5a Mon Sep 17 00:00:00 2001 From: Jeremy Fitzhardinge Date: Tue, 17 Jul 2007 18:37:02 -0700 Subject: Add common orderly_poweroff() Various pieces of code around the kernel want to be able to trigger an orderly poweroff. This pulls them together into a single implementation. By default the poweroff command is /sbin/poweroff, but it can be set via sysctl: kernel/poweroff_cmd. This is split at whitespace, so it can include command-line arguments. This patch replaces four other instances of invoking either "poweroff" or "shutdown -h now": two sbus drivers, and acpi thermal management. sparc64 has its own "powerd"; still need to determine whether it should be replaced by orderly_poweroff(). Signed-off-by: Jeremy Fitzhardinge Acked-by: Len Brown Signed-off-by: Chris Wright Cc: Andrew Morton Cc: Randy Dunlap Cc: Andi Kleen Cc: Al Viro Cc: Arnd Bergmann Cc: David S. Miller --- drivers/acpi/thermal.c | 24 ++---------------------- drivers/sbus/char/bbc_envctrl.c | 5 ++--- drivers/sbus/char/envctrl.c | 7 ++----- 3 files changed, 6 insertions(+), 30 deletions(-) (limited to 'drivers') diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c index 88a6fc7fd271..58f1338981bc 100644 --- a/drivers/acpi/thermal.c +++ b/drivers/acpi/thermal.c @@ -40,6 +40,7 @@ #include #include #include +#include #include #include @@ -59,7 +60,6 @@ #define ACPI_THERMAL_NOTIFY_CRITICAL 0xF0 #define ACPI_THERMAL_NOTIFY_HOT 0xF1 #define ACPI_THERMAL_MODE_ACTIVE 0x00 -#define ACPI_THERMAL_PATH_POWEROFF "/sbin/poweroff" #define ACPI_THERMAL_MAX_ACTIVE 10 #define ACPI_THERMAL_MAX_LIMIT_STR_LEN 65 @@ -419,26 +419,6 @@ static int acpi_thermal_get_devices(struct acpi_thermal *tz) return 0; } -static int acpi_thermal_call_usermode(char *path) -{ - char *argv[2] = { NULL, NULL }; - char *envp[3] = { NULL, NULL, NULL }; - - - if (!path) - return -EINVAL; - - argv[0] = path; - - /* minimal command environment */ - envp[0] = "HOME=/"; - envp[1] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin"; - - call_usermodehelper(argv[0], argv, envp, 0); - - return 0; -} - static int acpi_thermal_critical(struct acpi_thermal *tz) { if (!tz || !tz->trips.critical.flags.valid) @@ -456,7 +436,7 @@ static int acpi_thermal_critical(struct acpi_thermal *tz) acpi_bus_generate_event(tz->device, ACPI_THERMAL_NOTIFY_CRITICAL, tz->trips.critical.flags.enabled); - acpi_thermal_call_usermode(ACPI_THERMAL_PATH_POWEROFF); + orderly_poweroff(true); return 0; } diff --git a/drivers/sbus/char/bbc_envctrl.c b/drivers/sbus/char/bbc_envctrl.c index a54e4140683a..e821a155b658 100644 --- a/drivers/sbus/char/bbc_envctrl.c +++ b/drivers/sbus/char/bbc_envctrl.c @@ -7,6 +7,7 @@ #include #include #include +#include #include #include @@ -170,8 +171,6 @@ static void get_current_temps(struct bbc_cpu_temperature *tp) static void do_envctrl_shutdown(struct bbc_cpu_temperature *tp) { static int shutting_down = 0; - static char *envp[] = { "HOME=/", "TERM=linux", "PATH=/sbin:/usr/sbin:/bin:/usr/bin", NULL }; - char *argv[] = { "/sbin/shutdown", "-h", "now", NULL }; char *type = "???"; s8 val = -1; @@ -195,7 +194,7 @@ static void do_envctrl_shutdown(struct bbc_cpu_temperature *tp) printk(KERN_CRIT "kenvctrld: Shutting down the system now.\n"); shutting_down = 1; - if (call_usermodehelper("/sbin/shutdown", argv, envp, 0) < 0) + if (orderly_poweroff(true) < 0) printk(KERN_CRIT "envctrl: shutdown execution failed\n"); } diff --git a/drivers/sbus/char/envctrl.c b/drivers/sbus/char/envctrl.c index 8328acab47fd..dadabef116b6 100644 --- a/drivers/sbus/char/envctrl.c +++ b/drivers/sbus/char/envctrl.c @@ -26,6 +26,7 @@ #include #include #include +#include #include #include @@ -966,10 +967,6 @@ static struct i2c_child_t *envctrl_get_i2c_child(unsigned char mon_type) static void envctrl_do_shutdown(void) { static int inprog = 0; - static char *envp[] = { - "HOME=/", "TERM=linux", "PATH=/sbin:/usr/sbin:/bin:/usr/bin", NULL }; - char *argv[] = { - "/sbin/shutdown", "-h", "now", NULL }; int ret; if (inprog != 0) @@ -977,7 +974,7 @@ static void envctrl_do_shutdown(void) inprog = 1; printk(KERN_CRIT "kenvctrld: WARNING: Shutting down the system now.\n"); - ret = call_usermodehelper("/sbin/shutdown", argv, envp, 0); + ret = orderly_poweroff(true); if (ret < 0) { printk(KERN_CRIT "kenvctrld: WARNING: system shutdown failed!\n"); inprog = 0; /* unlikely to succeed, but we could try again */ -- cgit v1.2.2