Messages in this thread Patch in this message | | | From | Nigel Cunningham <> | Subject | [Suspend2][ 01/28] [Suspend2] Swapwriter.c header. | Date | Tue, 27 Jun 2006 08:41:09 +1000 |
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Header for kernel/power/suspend_swap.c.
Signed-off-by: Nigel Cunningham <nigel@suspend2.net>
kernel/power/suspend_swap.c | 89 +++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 89 insertions(+), 0 deletions(-)
diff --git a/kernel/power/suspend_swap.c b/kernel/power/suspend_swap.c new file mode 100644 index 0000000..7732a75 --- /dev/null +++ b/kernel/power/suspend_swap.c @@ -0,0 +1,89 @@ +/* + * Swapwriter.c + * + * Copyright 2004-2006 Nigel Cunningham <nigel@suspend2.net> + * + * Distributed under GPLv2. + * + * This file encapsulates functions for usage of swap space as a + * backing store. + */ + +#include <linux/suspend.h> +#include <linux/module.h> +#include <linux/blkdev.h> +#include <linux/swapops.h> +#include <linux/swap.h> + +#include "suspend2.h" +#include "suspend2_common.h" +#include "version.h" +#include "proc.h" +#include "modules.h" +#include "io.h" +#include "ui.h" +#include "extent.h" +#include "block_io.h" + +static struct suspend_module_ops swapwriterops; + +#define SIGNATURE_VER 6 + +/* --- Struct of pages stored on disk */ + +union diskpage { + union swap_header swh; /* swh.magic is the only member used */ +}; + +union p_diskpage { + union diskpage *pointer; + char *ptr; + unsigned long address; +}; + +/* Devices used for swap */ +static struct suspend_bdev_info devinfo[MAX_SWAPFILES]; + +/* Extent chains for swap & blocks */ +struct extent_chain swapextents; +struct extent_chain block_chain[MAX_SWAPFILES]; + +static dev_t header_dev_t; +static struct block_device *header_block_device; +static unsigned long headerblock; + +/* For swapfile automatically swapon/off'd. */ +static char swapfilename[SWAP_FILENAME_MAXLENGTH] = ""; +extern asmlinkage long sys_swapon(const char *specialfile, int swap_flags); +extern asmlinkage long sys_swapoff(const char *specialfile); +static int suspend_swapon_status; + +/* Header Page Information */ +static int header_pages_allocated; + +/* User Specified Parameters. */ + +static unsigned long resume_firstblock; +static int resume_blocksize; +static dev_t resume_dev_t; +static struct block_device *resume_block_device; + +struct sysinfo swapinfo; +static int swapwriter_invalidate_image(void); + +/* Block devices open. */ +struct bdev_opened +{ + dev_t device; + struct block_device *bdev; + int claimed; +}; + +/* + * Entry MAX_SWAPFILES is the resume block device, which may + * not be a swap device enabled when we suspend. + * Entry MAX_SWAPFILES + 1 is the header block device, which + * is needed before we find out which slot it occupies. + */ +static struct bdev_opened *bdev_info_list[MAX_SWAPFILES + 2]; + -- Nigel Cunningham nigel at suspend2 dot net - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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