#include <linux/suspend.h>
#include <linux/syscalls.h>
+#include <linux/reboot.h>
#include <linux/string.h>
#include <linux/device.h>
#include <linux/miscdevice.h>
#include <linux/swapops.h>
#include <linux/pm.h>
#include <linux/fs.h>
+#include <linux/console.h>
#include <linux/cpu.h>
+#include <linux/freezer.h>
#include <asm/uaccess.h>
filp->private_data = data;
memset(&data->handle, 0, sizeof(struct snapshot_handle));
if ((filp->f_flags & O_ACCMODE) == O_RDONLY) {
- data->swap = swsusp_resume_device ? swap_type_of(swsusp_resume_device) : -1;
+ data->swap = swsusp_resume_device ?
+ swap_type_of(swsusp_resume_device, 0, NULL) : -1;
data->mode = O_RDONLY;
} else {
data->swap = -1;
free_all_swap_pages(data->swap, data->bitmap);
free_bitmap(data->bitmap);
if (data->frozen) {
- down(&pm_sem);
+ mutex_lock(&pm_mutex);
thaw_processes();
enable_nonboot_cpus();
- up(&pm_sem);
+ mutex_unlock(&pm_mutex);
}
atomic_inc(&device_available);
return 0;
{
int error = 0;
struct snapshot_data *data;
- loff_t offset, avail;
+ loff_t avail;
+ sector_t offset;
if (_IOC_TYPE(cmd) != SNAPSHOT_IOC_MAGIC)
return -ENOTTY;
case SNAPSHOT_FREEZE:
if (data->frozen)
break;
- down(&pm_sem);
+ mutex_lock(&pm_mutex);
error = disable_nonboot_cpus();
if (!error) {
error = freeze_processes();
if (error) {
thaw_processes();
+ enable_nonboot_cpus();
error = -EBUSY;
}
}
- enable_nonboot_cpus();
- up(&pm_sem);
+ mutex_unlock(&pm_mutex);
if (!error)
data->frozen = 1;
break;
case SNAPSHOT_UNFREEZE:
if (!data->frozen)
break;
- down(&pm_sem);
+ mutex_lock(&pm_mutex);
thaw_processes();
enable_nonboot_cpus();
- up(&pm_sem);
+ mutex_unlock(&pm_mutex);
data->frozen = 0;
break;
error = -EPERM;
break;
}
- down(&pm_sem);
+ mutex_lock(&pm_mutex);
/* Free memory before shutting down devices. */
error = swsusp_shrink_memory();
if (!error) {
+ suspend_console();
error = device_suspend(PMSG_FREEZE);
if (!error) {
in_suspend = 1;
error = swsusp_suspend();
device_resume();
}
+ resume_console();
}
- up(&pm_sem);
+ mutex_unlock(&pm_mutex);
if (!error)
error = put_user(in_suspend, (unsigned int __user *)arg);
if (!error)
break;
case SNAPSHOT_ATOMIC_RESTORE:
+ snapshot_write_finalize(&data->handle);
if (data->mode != O_WRONLY || !data->frozen ||
!snapshot_image_loaded(&data->handle)) {
error = -EPERM;
break;
}
- down(&pm_sem);
+ mutex_lock(&pm_mutex);
pm_prepare_console();
- error = device_suspend(PMSG_FREEZE);
+ suspend_console();
+ error = device_suspend(PMSG_PRETHAW);
if (!error) {
error = swsusp_resume();
device_resume();
}
+ resume_console();
pm_restore_console();
- up(&pm_sem);
+ mutex_unlock(&pm_mutex);
break;
case SNAPSHOT_FREE:
break;
}
}
- offset = alloc_swap_page(data->swap, data->bitmap);
+ offset = alloc_swapdev_block(data->swap, data->bitmap);
if (offset) {
offset <<= PAGE_SHIFT;
- error = put_user(offset, (loff_t __user *)arg);
+ error = put_user(offset, (sector_t __user *)arg);
} else {
error = -ENOSPC;
}
* so we need to recode them
*/
if (old_decode_dev(arg)) {
- data->swap = swap_type_of(old_decode_dev(arg));
+ data->swap = swap_type_of(old_decode_dev(arg),
+ 0, NULL);
if (data->swap < 0)
error = -ENODEV;
} else {
break;
}
- if (down_trylock(&pm_sem)) {
+ if (!mutex_trylock(&pm_mutex)) {
error = -EBUSY;
break;
}
- if (pm_ops->prepare) {
+ if (pm_ops && 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");
/* Wake up devices */
device_resume();
}
-
- if (pm_ops->finish)
+ resume_console();
+ if (pm_ops && pm_ops->finish)
pm_ops->finish(PM_SUSPEND_MEM);
-OutS3:
- up(&pm_sem);
+ OutS3:
+ mutex_unlock(&pm_mutex);
+ break;
+
+ case SNAPSHOT_PMOPS:
+ switch (arg) {
+
+ case PMOPS_PREPARE:
+ if (pm_ops && pm_ops->prepare)
+ error = pm_ops->prepare(PM_SUSPEND_DISK);
+ else
+ error = -ENOSYS;
+ break;
+
+ case PMOPS_ENTER:
+ kernel_shutdown_prepare(SYSTEM_SUSPEND_DISK);
+ if (pm_ops && pm_ops->enter)
+ error = pm_ops->enter(PM_SUSPEND_DISK);
+ else
+ error = -ENOSYS;
+ break;
+
+ case PMOPS_FINISH:
+ if (pm_ops && pm_ops->finish)
+ pm_ops->finish(PM_SUSPEND_DISK);
+ else
+ error = -ENOSYS;
+ break;
+
+ default:
+ printk(KERN_ERR "SNAPSHOT_PMOPS: invalid argument %ld\n", arg);
+ error = -EINVAL;
+
+ }
+ break;
+
+ case SNAPSHOT_SET_SWAP_AREA:
+ if (data->bitmap) {
+ error = -EPERM;
+ } else {
+ struct resume_swap_area swap_area;
+ dev_t swdev;
+
+ error = copy_from_user(&swap_area, (void __user *)arg,
+ sizeof(struct resume_swap_area));
+ if (error) {
+ error = -EFAULT;
+ break;
+ }
+
+ /*
+ * User space encodes device types as two-byte values,
+ * so we need to recode them
+ */
+ swdev = old_decode_dev(swap_area.dev);
+ if (swdev) {
+ offset = swap_area.offset;
+ data->swap = swap_type_of(swdev, offset, NULL);
+ if (data->swap < 0)
+ error = -ENODEV;
+ } else {
+ data->swap = -1;
+ error = -EINVAL;
+ }
+ }
break;
default:
return error;
}
-static struct file_operations snapshot_fops = {
+static const struct file_operations snapshot_fops = {
.open = snapshot_open,
.release = snapshot_release,
.read = snapshot_read,