diff options
| -rw-r--r-- | Documentation/power/userland-swsusp.txt | 10 | ||||
| -rw-r--r-- | include/linux/Kbuild | 1 | ||||
| -rw-r--r-- | include/linux/suspend_ioctls.h | 32 | ||||
| -rw-r--r-- | kernel/power/power.h | 29 |
4 files changed, 39 insertions, 33 deletions
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; |
