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    Subject[Suspend2][ 03/35] [Suspend2] Get filewriter storage available.
    Date
    Return the amount of storage available to the filewriter, in pages.

    Signed-off-by: Nigel Cunningham <nigel@suspend2.net>

    kernel/power/suspend_file.c | 31 +++++++++++++++++++++++++++++++
    1 files changed, 31 insertions(+), 0 deletions(-)

    diff --git a/kernel/power/suspend_file.c b/kernel/power/suspend_file.c
    index 36db6b8..caa86bc 100644
    --- a/kernel/power/suspend_file.c
    +++ b/kernel/power/suspend_file.c
    @@ -105,3 +105,34 @@ static void set_devinfo(struct block_dev
    }
    }

    +static int filewriter_storage_available(void)
    +{
    + int result = 0;
    + struct block_device *bdev=filewriter_target_bdev;
    +
    + if (!target_inode)
    + return 0;
    +
    + switch (target_inode->i_mode & S_IFMT) {
    + case S_IFSOCK:
    + case S_IFCHR:
    + case S_IFIFO: /* Socket, Char, Fifo */
    + return -1;
    + case S_IFREG: /* Regular file: current size - holes + free
    + space on part */
    + result = target_storage_available;
    + break;
    + case S_IFBLK: /* Block device */
    + if (!bdev->bd_disk) {
    + printk("bdev->bd_disk null.\n");
    + return 0;
    + }
    +
    + result = (bdev->bd_part ?
    + bdev->bd_part->nr_sects :
    + bdev->bd_disk->capacity) >> (PAGE_SHIFT - 9);
    + }
    +
    + return result;
    +}
    +
    --
    Nigel Cunningham nigel at suspend2 dot net
    -
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