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Message-Id: <f07d2c9078e140323301a72140c6caeb372448dc.1201840183.git.len.brown@intel.com>
Date: Thu, 31 Jan 2008 23:36:36 -0500
From: Len Brown <lenb@...nel.org>
To: linux-pm@...ts.linux-foundation.org
Cc: linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
"Rafael J. Wysocki" <rjw@...k.pl>, Len Brown <len.brown@...el.com>
Subject: [PATCH 05/37] Hibernation: Introduce exportable suspend ioctls header (rev. 2)
From: Rafael J. Wysocki <rjw@...k.pl>
Move the definitions of hibernation ioctls to a separate header file in
include/linux, which can be exported to the user space.
Signed-off-by: Rafael J. Wysocki <rjw@...k.pl>
Acked-by: Pavel Machek <pavel@....cz>
Signed-off-by: Len Brown <len.brown@...el.com>
---
Documentation/power/userland-swsusp.txt | 10 ++++----
include/linux/Kbuild | 1 +
include/linux/suspend_ioctls.h | 32 +++++++++++++++++++++++++++++++
kernel/power/power.h | 29 +---------------------------
4 files changed, 39 insertions(+), 33 deletions(-)
create mode 100644 include/linux/suspend_ioctls.h
diff --git a/Documentation/power/userland-swsusp.txt b/Documentation/power/userland-swsusp.txt
index af52d53..7b99636 100644
--- a/Documentation/power/userland-swsusp.txt
+++ b/Documentation/power/userland-swsusp.txt
@@ -14,7 +14,7 @@ are going to develop your own suspend/resume utilities.
The interface consists of a character device providing the open(),
release(), read(), and write() operations as well as several ioctl()
-commands defined in kernel/power/power.h. The major and minor
+commands defined in include/linux/suspend_ioctls.h . The major and minor
numbers of the device are, respectively, 10 and 231, and they can
be read from /sys/class/misc/snapshot/dev.
@@ -70,10 +70,10 @@ SNAPSHOT_FREE_SWAP_PAGES - free all swap pages allocated by
SNAPSHOT_SET_SWAP_AREA - set the resume partition and the offset (in <PAGE_SIZE>
units) from the beginning of the partition at which the swap header is
located (the last ioctl() argument should point to a struct
- resume_swap_area, as defined in kernel/power/power.h, containing the
- resume device specification and the offset); for swap partitions the
- offset is always 0, but it is different from zero for swap files (see
- Documentation/swsusp-and-swap-files.txt for details).
+ resume_swap_area, as defined in kernel/power/suspend_ioctls.h,
+ containing the resume device specification and the offset); for swap
+ partitions the offset is always 0, but it is different from zero for
+ swap files (see Documentation/swsusp-and-swap-files.txt for details).
SNAPSHOT_PLATFORM_SUPPORT - enable/disable the hibernation platform support,
depending on the argument value (enable, if the argument is nonzero)
diff --git a/include/linux/Kbuild b/include/linux/Kbuild
index 85b2482..c0f9bb7 100644
--- a/include/linux/Kbuild
+++ b/include/linux/Kbuild
@@ -143,6 +143,7 @@ header-y += snmp.h
header-y += sockios.h
header-y += som.h
header-y += sound.h
+header-y += suspend_ioctls.h
header-y += taskstats.h
header-y += telephony.h
header-y += termios.h
diff --git a/include/linux/suspend_ioctls.h b/include/linux/suspend_ioctls.h
new file mode 100644
index 0000000..2c6faec
--- /dev/null
+++ b/include/linux/suspend_ioctls.h
@@ -0,0 +1,32 @@
+#ifndef _LINUX_SUSPEND_IOCTLS_H
+#define _LINUX_SUSPEND_IOCTLS_H
+
+/*
+ * This structure is used to pass the values needed for the identification
+ * of the resume swap area from a user space to the kernel via the
+ * SNAPSHOT_SET_SWAP_AREA ioctl
+ */
+struct resume_swap_area {
+ loff_t offset;
+ u_int32_t dev;
+} __attribute__((packed));
+
+#define SNAPSHOT_IOC_MAGIC '3'
+#define SNAPSHOT_FREEZE _IO(SNAPSHOT_IOC_MAGIC, 1)
+#define SNAPSHOT_UNFREEZE _IO(SNAPSHOT_IOC_MAGIC, 2)
+#define SNAPSHOT_ATOMIC_RESTORE _IO(SNAPSHOT_IOC_MAGIC, 4)
+#define SNAPSHOT_FREE _IO(SNAPSHOT_IOC_MAGIC, 5)
+#define SNAPSHOT_FREE_SWAP_PAGES _IO(SNAPSHOT_IOC_MAGIC, 9)
+#define SNAPSHOT_S2RAM _IO(SNAPSHOT_IOC_MAGIC, 11)
+#define SNAPSHOT_SET_SWAP_AREA _IOW(SNAPSHOT_IOC_MAGIC, 13, \
+ struct resume_swap_area)
+#define SNAPSHOT_GET_IMAGE_SIZE _IOR(SNAPSHOT_IOC_MAGIC, 14, loff_t)
+#define SNAPSHOT_PLATFORM_SUPPORT _IO(SNAPSHOT_IOC_MAGIC, 15)
+#define SNAPSHOT_POWER_OFF _IO(SNAPSHOT_IOC_MAGIC, 16)
+#define SNAPSHOT_CREATE_IMAGE _IOW(SNAPSHOT_IOC_MAGIC, 17, int)
+#define SNAPSHOT_PREF_IMAGE_SIZE _IO(SNAPSHOT_IOC_MAGIC, 18)
+#define SNAPSHOT_AVAIL_SWAP_SIZE _IOR(SNAPSHOT_IOC_MAGIC, 19, loff_t)
+#define SNAPSHOT_ALLOC_SWAP_PAGE _IOR(SNAPSHOT_IOC_MAGIC, 20, loff_t)
+#define SNAPSHOT_IOC_MAXNR 20
+
+#endif /* _LINUX_SUSPEND_IOCTLS_H */
diff --git a/kernel/power/power.h b/kernel/power/power.h
index 0dd66fa..ef90605 100644
--- a/kernel/power/power.h
+++ b/kernel/power/power.h
@@ -1,4 +1,5 @@
#include <linux/suspend.h>
+#include <linux/suspend_ioctls.h>
#include <linux/utsname.h>
struct swsusp_info {
@@ -134,34 +135,6 @@ extern int snapshot_write_next(struct snapshot_handle *handle, size_t count);
extern void snapshot_write_finalize(struct snapshot_handle *handle);
extern int snapshot_image_loaded(struct snapshot_handle *handle);
-/*
- * This structure is used to pass the values needed for the identification
- * of the resume swap area from a user space to the kernel via the
- * SNAPSHOT_SET_SWAP_AREA ioctl
- */
-struct resume_swap_area {
- loff_t offset;
- u_int32_t dev;
-} __attribute__((packed));
-
-#define SNAPSHOT_IOC_MAGIC '3'
-#define SNAPSHOT_FREEZE _IO(SNAPSHOT_IOC_MAGIC, 1)
-#define SNAPSHOT_UNFREEZE _IO(SNAPSHOT_IOC_MAGIC, 2)
-#define SNAPSHOT_ATOMIC_RESTORE _IO(SNAPSHOT_IOC_MAGIC, 4)
-#define SNAPSHOT_FREE _IO(SNAPSHOT_IOC_MAGIC, 5)
-#define SNAPSHOT_FREE_SWAP_PAGES _IO(SNAPSHOT_IOC_MAGIC, 9)
-#define SNAPSHOT_S2RAM _IO(SNAPSHOT_IOC_MAGIC, 11)
-#define SNAPSHOT_SET_SWAP_AREA _IOW(SNAPSHOT_IOC_MAGIC, 13, \
- struct resume_swap_area)
-#define SNAPSHOT_GET_IMAGE_SIZE _IOR(SNAPSHOT_IOC_MAGIC, 14, loff_t)
-#define SNAPSHOT_PLATFORM_SUPPORT _IO(SNAPSHOT_IOC_MAGIC, 15)
-#define SNAPSHOT_POWER_OFF _IO(SNAPSHOT_IOC_MAGIC, 16)
-#define SNAPSHOT_CREATE_IMAGE _IOW(SNAPSHOT_IOC_MAGIC, 17, int)
-#define SNAPSHOT_PREF_IMAGE_SIZE _IO(SNAPSHOT_IOC_MAGIC, 18)
-#define SNAPSHOT_AVAIL_SWAP_SIZE _IOR(SNAPSHOT_IOC_MAGIC, 19, loff_t)
-#define SNAPSHOT_ALLOC_SWAP_PAGE _IOR(SNAPSHOT_IOC_MAGIC, 20, loff_t)
-#define SNAPSHOT_IOC_MAXNR 20
-
/* If unset, the snapshot device cannot be open. */
extern atomic_t snapshot_device_available;
--
1.5.4.rc5.16.gc0279
--
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