#include "power.h"
+/*
+ * NOTE: The SNAPSHOT_SET_SWAP_FILE and SNAPSHOT_PMOPS ioctls are obsolete and
+ * will be removed in the future. They are only preserved here for
+ * compatibility with existing userland utilities.
+ */
+#define SNAPSHOT_SET_SWAP_FILE _IOW(SNAPSHOT_IOC_MAGIC, 10, unsigned int)
+#define SNAPSHOT_PMOPS _IOW(SNAPSHOT_IOC_MAGIC, 12, unsigned int)
+
+#define PMOPS_PREPARE 1
+#define PMOPS_ENTER 2
+#define PMOPS_FINISH 3
+
+/*
+ * NOTE: The following ioctl definitions are wrong and have been replaced with
+ * correct ones. They are only preserved here for compatibility with existing
+ * userland utilities and will be removed in the future.
+ */
+#define SNAPSHOT_ATOMIC_SNAPSHOT _IOW(SNAPSHOT_IOC_MAGIC, 3, void *)
+#define SNAPSHOT_SET_IMAGE_SIZE _IOW(SNAPSHOT_IOC_MAGIC, 6, unsigned long)
+#define SNAPSHOT_AVAIL_SWAP _IOR(SNAPSHOT_IOC_MAGIC, 7, void *)
+#define SNAPSHOT_GET_SWAP_PAGE _IOR(SNAPSHOT_IOC_MAGIC, 8, void *)
+
+
#define SNAPSHOT_MINOR 231
static struct snapshot_data {
int mode;
char frozen;
char ready;
- char platform_suspend;
+ char platform_support;
} snapshot_state;
atomic_t snapshot_device_available = ATOMIC_INIT(1);
static int snapshot_open(struct inode *inode, struct file *filp)
{
struct snapshot_data *data;
+ int error;
if (!atomic_add_unless(&snapshot_device_available, -1, 0))
return -EBUSY;
data->swap = swsusp_resume_device ?
swap_type_of(swsusp_resume_device, 0, NULL) : -1;
data->mode = O_RDONLY;
+ error = pm_notifier_call_chain(PM_RESTORE_PREPARE);
+ if (error)
+ pm_notifier_call_chain(PM_POST_RESTORE);
} else {
data->swap = -1;
data->mode = O_WRONLY;
+ error = pm_notifier_call_chain(PM_HIBERNATION_PREPARE);
+ if (error)
+ pm_notifier_call_chain(PM_POST_HIBERNATION);
+ }
+ if (error) {
+ atomic_inc(&snapshot_device_available);
+ return error;
}
data->frozen = 0;
data->ready = 0;
- data->platform_suspend = 0;
+ data->platform_support = 0;
return 0;
}
thaw_processes();
mutex_unlock(&pm_mutex);
}
+ pm_notifier_call_chain(data->mode == O_WRONLY ?
+ PM_POST_HIBERNATION : PM_POST_RESTORE);
atomic_inc(&snapshot_device_available);
return 0;
}
return res;
}
-static inline int platform_prepare(void)
-{
- int error = 0;
-
- if (hibernation_ops)
- error = hibernation_ops->prepare();
-
- return error;
-}
-
-static inline void platform_finish(void)
-{
- if (hibernation_ops)
- hibernation_ops->finish();
-}
-
-static inline int snapshot_suspend(int platform_suspend)
-{
- int error;
-
- mutex_lock(&pm_mutex);
- /* Free memory before shutting down devices. */
- error = swsusp_shrink_memory();
- if (error)
- goto Finish;
-
- if (platform_suspend) {
- error = platform_prepare();
- if (error)
- goto Finish;
- }
- suspend_console();
- error = device_suspend(PMSG_FREEZE);
- if (error)
- goto Resume_devices;
-
- error = disable_nonboot_cpus();
- if (!error) {
- in_suspend = 1;
- error = swsusp_suspend();
- }
- enable_nonboot_cpus();
- Resume_devices:
- if (platform_suspend)
- platform_finish();
-
- device_resume();
- resume_console();
- Finish:
- mutex_unlock(&pm_mutex);
- return error;
-}
-
-static inline int snapshot_restore(int platform_suspend)
-{
- int error;
-
- mutex_lock(&pm_mutex);
- pm_prepare_console();
- if (platform_suspend) {
- error = platform_prepare();
- if (error)
- goto Finish;
- }
- suspend_console();
- error = device_suspend(PMSG_PRETHAW);
- if (error)
- goto Resume_devices;
-
- error = disable_nonboot_cpus();
- if (!error)
- error = swsusp_resume();
-
- enable_nonboot_cpus();
- Resume_devices:
- if (platform_suspend)
- platform_finish();
-
- device_resume();
- resume_console();
- Finish:
- pm_restore_console();
- mutex_unlock(&pm_mutex);
- return error;
-}
-
static int snapshot_ioctl(struct inode *inode, struct file *filp,
unsigned int cmd, unsigned long arg)
{
int error = 0;
struct snapshot_data *data;
- loff_t avail;
+ loff_t size;
sector_t offset;
if (_IOC_TYPE(cmd) != SNAPSHOT_IOC_MAGIC)
if (data->frozen)
break;
mutex_lock(&pm_mutex);
- if (freeze_processes()) {
+ printk("Syncing filesystems ... ");
+ sys_sync();
+ printk("done.\n");
+
+ error = freeze_processes();
+ if (error)
thaw_processes();
- error = -EBUSY;
- }
mutex_unlock(&pm_mutex);
if (!error)
data->frozen = 1;
data->frozen = 0;
break;
+ case SNAPSHOT_CREATE_IMAGE:
case SNAPSHOT_ATOMIC_SNAPSHOT:
if (data->mode != O_RDONLY || !data->frozen || data->ready) {
error = -EPERM;
break;
}
- error = snapshot_suspend(data->platform_suspend);
+ error = hibernation_snapshot(data->platform_support);
if (!error)
- error = put_user(in_suspend, (unsigned int __user *)arg);
+ error = put_user(in_suspend, (int __user *)arg);
if (!error)
data->ready = 1;
break;
error = -EPERM;
break;
}
- error = snapshot_restore(data->platform_suspend);
+ error = hibernation_restore(data->platform_support);
break;
case SNAPSHOT_FREE:
data->ready = 0;
break;
+ case SNAPSHOT_PREF_IMAGE_SIZE:
case SNAPSHOT_SET_IMAGE_SIZE:
image_size = arg;
break;
+ case SNAPSHOT_GET_IMAGE_SIZE:
+ if (!data->ready) {
+ error = -ENODATA;
+ break;
+ }
+ size = snapshot_get_image_size();
+ size <<= PAGE_SHIFT;
+ error = put_user(size, (loff_t __user *)arg);
+ break;
+
+ case SNAPSHOT_AVAIL_SWAP_SIZE:
case SNAPSHOT_AVAIL_SWAP:
- avail = count_swap_pages(data->swap, 1);
- avail <<= PAGE_SHIFT;
- error = put_user(avail, (loff_t __user *)arg);
+ size = count_swap_pages(data->swap, 1);
+ size <<= PAGE_SHIFT;
+ error = put_user(size, (loff_t __user *)arg);
break;
+ case SNAPSHOT_ALLOC_SWAP_PAGE:
case SNAPSHOT_GET_SWAP_PAGE:
if (data->swap < 0 || data->swap >= MAX_SWAPFILES) {
error = -ENODEV;
offset = alloc_swapdev_block(data->swap);
if (offset) {
offset <<= PAGE_SHIFT;
- error = put_user(offset, (sector_t __user *)arg);
+ error = put_user(offset, (loff_t __user *)arg);
} else {
error = -ENOSPC;
}
free_all_swap_pages(data->swap);
break;
- case SNAPSHOT_SET_SWAP_FILE:
+ case SNAPSHOT_SET_SWAP_FILE: /* This ioctl is deprecated */
if (!swsusp_swap_in_use()) {
/*
* User space encodes device types as two-byte values,
break;
case SNAPSHOT_S2RAM:
- if (!pm_ops) {
- error = -ENOSYS;
- break;
- }
-
if (!data->frozen) {
error = -EPERM;
break;
}
-
if (!mutex_trylock(&pm_mutex)) {
error = -EBUSY;
break;
}
+ /*
+ * Tasks are frozen and the notifiers have been called with
+ * PM_HIBERNATION_PREPARE
+ */
+ error = suspend_devices_and_enter(PM_SUSPEND_MEM);
+ mutex_unlock(&pm_mutex);
+ break;
- if (pm_ops->prepare) {
- error = pm_ops->prepare(PM_SUSPEND_MEM);
- if (error)
- goto OutS3;
- }
-
- /* Put devices to sleep */
- suspend_console();
- error = device_suspend(PMSG_SUSPEND);
- if (error) {
- printk(KERN_ERR "Failed to suspend some devices.\n");
- } else {
- error = disable_nonboot_cpus();
- if (!error) {
- /* Enter S3, system is already frozen */
- suspend_enter(PM_SUSPEND_MEM);
- enable_nonboot_cpus();
- }
- /* Wake up devices */
- device_resume();
- }
- resume_console();
- if (pm_ops->finish)
- pm_ops->finish(PM_SUSPEND_MEM);
+ case SNAPSHOT_PLATFORM_SUPPORT:
+ data->platform_support = !!arg;
+ break;
- OutS3:
- mutex_unlock(&pm_mutex);
+ case SNAPSHOT_POWER_OFF:
+ if (data->platform_support)
+ error = hibernation_platform_enter();
break;
- case SNAPSHOT_PMOPS:
+ case SNAPSHOT_PMOPS: /* This ioctl is deprecated */
error = -EINVAL;
switch (arg) {
case PMOPS_PREPARE:
- if (hibernation_ops) {
- data->platform_suspend = 1;
- error = 0;
- } else {
- error = -ENOSYS;
- }
+ data->platform_support = 1;
+ error = 0;
break;
case PMOPS_ENTER:
- if (data->platform_suspend) {
- kernel_shutdown_prepare(SYSTEM_SUSPEND_DISK);
- error = hibernation_ops->enter();
- }
+ if (data->platform_support)
+ error = hibernation_platform_enter();
break;
case PMOPS_FINISH:
- if (data->platform_suspend)
+ if (data->platform_support)
error = 0;
-
break;
default:
git.samba.org / sfrench / cifs-2.6.git / blobdiff