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Subject[Suspend2][ 25/32] [Suspend2] Do io on a page in the image proper.
Date
Advance one page and perform the requested i/o.

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

kernel/power/suspend_block_io.c | 35 +++++++++++++++++++++++++++++++++++
1 files changed, 35 insertions(+), 0 deletions(-)
diff --git a/kernel/power/suspend_block_io.c b/kernel/power/suspend_block_io.c
index ffc2e16..c746f9f 100644
--- a/kernel/power/suspend_block_io.c
+++ b/kernel/power/suspend_block_io.c
@@ -821,3 +821,38 @@ static void set_extra_page_forward(void)
extra_page_forward = 1;
}

+static int suspend_rw_page(int rw, struct page *page,
+ int readahead_index, int sync, int debug)
+{
+ int i, current_chain;
+ struct submit_params submit_params;
+
+ if (test_action_state(SUSPEND_TEST_FILTER_SPEED))
+ return 0;
+
+ submit_params.readahead_index = readahead_index;
+ submit_params.page = page;
+
+ if (forward_one_page()) {
+ printk("Failed to advance a page in the extent data.\n");
+ return -ENODATA;
+ }
+
+ current_chain = suspend_writer_posn.current_chain;
+ submit_params.dev = suspend_devinfo[current_chain].bdev;
+ submit_params.block[0] = suspend_writer_posn.current_offset <<
+ suspend_devinfo[current_chain].bmap_shift;
+
+ if (debug)
+ printk("%s: %lx:%lx.\n", rw ? "Write" : "Read",
+ (long) submit_params.dev->bd_dev,
+ (long) submit_params.block[0]);
+
+ i = suspend_do_io(rw, &submit_params, sync);
+
+ if (i)
+ return -EIO;
+
+ return 0;
+}
+
--
Nigel Cunningham nigel at suspend2 dot net
-
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