#include <linux/swapops.h>
#include <linux/pm.h>
#include <linux/fs.h>
+#include <linux/compat.h>
#include <linux/console.h>
#include <linux/cpu.h>
#include <linux/freezer.h>
#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
struct snapshot_data *data;
int error;
- mutex_lock(&pm_mutex);
+ lock_system_sleep();
if (!atomic_add_unless(&snapshot_device_available, -1, 0)) {
error = -EBUSY;
data->platform_support = 0;
Unlock:
- mutex_unlock(&pm_mutex);
+ unlock_system_sleep();
return error;
}
{
struct snapshot_data *data;
- mutex_lock(&pm_mutex);
+ lock_system_sleep();
swsusp_free();
free_basic_memory_bitmaps();
PM_POST_HIBERNATION : PM_POST_RESTORE);
atomic_inc(&snapshot_device_available);
- mutex_unlock(&pm_mutex);
+ unlock_system_sleep();
return 0;
}
ssize_t res;
loff_t pg_offp = *offp & ~PAGE_MASK;
- mutex_lock(&pm_mutex);
+ lock_system_sleep();
data = filp->private_data;
if (!data->ready) {
*offp += res;
Unlock:
- mutex_unlock(&pm_mutex);
+ unlock_system_sleep();
return res;
}
ssize_t res;
loff_t pg_offp = *offp & ~PAGE_MASK;
- mutex_lock(&pm_mutex);
+ lock_system_sleep();
data = filp->private_data;
if (res > 0)
*offp += res;
unlock:
- mutex_unlock(&pm_mutex);
+ unlock_system_sleep();
return res;
}
-static void snapshot_deprecated_ioctl(unsigned int cmd)
-{
- if (printk_ratelimit())
- printk(KERN_NOTICE "%pf: ioctl '%.8x' is deprecated and will "
- "be removed soon, update your suspend-to-disk "
- "utilities\n",
- __builtin_return_address(0), cmd);
-}
-
static long snapshot_ioctl(struct file *filp, unsigned int cmd,
unsigned long arg)
{
break;
error = freeze_processes();
- if (error) {
- thaw_processes();
+ if (error)
usermodehelper_enable();
- }
- if (!error)
+ else
data->frozen = 1;
break;
data->frozen = 0;
break;
- case SNAPSHOT_ATOMIC_SNAPSHOT:
- snapshot_deprecated_ioctl(cmd);
case SNAPSHOT_CREATE_IMAGE:
if (data->mode != O_RDONLY || !data->frozen || data->ready) {
error = -EPERM;
}
pm_restore_gfp_mask();
error = hibernation_snapshot(data->platform_support);
- if (!error)
+ if (!error) {
error = put_user(in_suspend, (int __user *)arg);
- if (!error)
- data->ready = 1;
+ if (!error && !freezer_test_done)
+ data->ready = 1;
+ if (freezer_test_done) {
+ freezer_test_done = false;
+ thaw_processes();
+ }
+ }
break;
case SNAPSHOT_ATOMIC_RESTORE:
swsusp_free();
memset(&data->handle, 0, sizeof(struct snapshot_handle));
data->ready = 0;
+ /*
+ * It is necessary to thaw kernel threads here, because
+ * SNAPSHOT_CREATE_IMAGE may be invoked directly after
+ * SNAPSHOT_FREE. In that case, if kernel threads were not
+ * thawed, the preallocation of memory carried out by
+ * hibernation_snapshot() might run into problems (i.e. it
+ * might fail or even deadlock).
+ */
+ thaw_kernel_threads();
break;
- case SNAPSHOT_SET_IMAGE_SIZE:
- snapshot_deprecated_ioctl(cmd);
case SNAPSHOT_PREF_IMAGE_SIZE:
image_size = arg;
break;
error = put_user(size, (loff_t __user *)arg);
break;
- case SNAPSHOT_AVAIL_SWAP:
- snapshot_deprecated_ioctl(cmd);
case SNAPSHOT_AVAIL_SWAP_SIZE:
size = count_swap_pages(data->swap, 1);
size <<= PAGE_SHIFT;
error = put_user(size, (loff_t __user *)arg);
break;
- case SNAPSHOT_GET_SWAP_PAGE:
- snapshot_deprecated_ioctl(cmd);
case SNAPSHOT_ALLOC_SWAP_PAGE:
if (data->swap < 0 || data->swap >= MAX_SWAPFILES) {
error = -ENODEV;
free_all_swap_pages(data->swap);
break;
- case SNAPSHOT_SET_SWAP_FILE: /* This ioctl is deprecated */
- snapshot_deprecated_ioctl(cmd);
- if (!swsusp_swap_in_use()) {
- /*
- * User space encodes device types as two-byte values,
- * so we need to recode them
- */
- if (old_decode_dev(arg)) {
- data->swap = swap_type_of(old_decode_dev(arg),
- 0, NULL);
- if (data->swap < 0)
- error = -ENODEV;
- } else {
- data->swap = -1;
- error = -EINVAL;
- }
- } else {
- error = -EPERM;
- }
- break;
-
case SNAPSHOT_S2RAM:
if (!data->frozen) {
error = -EPERM;
error = hibernation_platform_enter();
break;
- case SNAPSHOT_PMOPS: /* This ioctl is deprecated */
- snapshot_deprecated_ioctl(cmd);
- error = -EINVAL;
-
- switch (arg) {
-
- case PMOPS_PREPARE:
- data->platform_support = 1;
- error = 0;
- break;
-
- case PMOPS_ENTER:
- if (data->platform_support)
- error = hibernation_platform_enter();
- break;
-
- case PMOPS_FINISH:
- if (data->platform_support)
- error = 0;
- break;
-
- default:
- printk(KERN_ERR "SNAPSHOT_PMOPS: invalid argument %ld\n", arg);
-
- }
- break;
-
case SNAPSHOT_SET_SWAP_AREA:
if (swsusp_swap_in_use()) {
error = -EPERM;
return error;
}
+#ifdef CONFIG_COMPAT
+
+struct compat_resume_swap_area {
+ compat_loff_t offset;
+ u32 dev;
+} __packed;
+
+static long
+snapshot_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+ BUILD_BUG_ON(sizeof(loff_t) != sizeof(compat_loff_t));
+
+ switch (cmd) {
+ case SNAPSHOT_GET_IMAGE_SIZE:
+ case SNAPSHOT_AVAIL_SWAP_SIZE:
+ case SNAPSHOT_ALLOC_SWAP_PAGE: {
+ compat_loff_t __user *uoffset = compat_ptr(arg);
+ loff_t offset;
+ mm_segment_t old_fs;
+ int err;
+
+ old_fs = get_fs();
+ set_fs(KERNEL_DS);
+ err = snapshot_ioctl(file, cmd, (unsigned long) &offset);
+ set_fs(old_fs);
+ if (!err && put_user(offset, uoffset))
+ err = -EFAULT;
+ return err;
+ }
+
+ case SNAPSHOT_CREATE_IMAGE:
+ return snapshot_ioctl(file, cmd,
+ (unsigned long) compat_ptr(arg));
+
+ case SNAPSHOT_SET_SWAP_AREA: {
+ struct compat_resume_swap_area __user *u_swap_area =
+ compat_ptr(arg);
+ struct resume_swap_area swap_area;
+ mm_segment_t old_fs;
+ int err;
+
+ err = get_user(swap_area.offset, &u_swap_area->offset);
+ err |= get_user(swap_area.dev, &u_swap_area->dev);
+ if (err)
+ return -EFAULT;
+ old_fs = get_fs();
+ set_fs(KERNEL_DS);
+ err = snapshot_ioctl(file, SNAPSHOT_SET_SWAP_AREA,
+ (unsigned long) &swap_area);
+ set_fs(old_fs);
+ return err;
+ }
+
+ default:
+ return snapshot_ioctl(file, cmd, arg);
+ }
+}
+
+#endif /* CONFIG_COMPAT */
+
static const struct file_operations snapshot_fops = {
.open = snapshot_open,
.release = snapshot_release,
.write = snapshot_write,
.llseek = no_llseek,
.unlocked_ioctl = snapshot_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = snapshot_compat_ioctl,
+#endif
};
static struct miscdevice snapshot_device = {
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