[Suspend2][ 23/35] [Suspend2] Filewriter storage needed.

[Nigel Cunningham <nigel@suspend2.net>]

Return the amount of space in the image header required by the filewriter.

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

 kernel/power/suspend_file.c |   20 ++++++++++++++++++++
 1 files changed, 20 insertions(+), 0 deletions(-)

diff --git a/kernel/power/suspend_file.c b/kernel/power/suspend_file.c
index a4871c7..4f9d6f5 100644
--- a/kernel/power/suspend_file.c
+++ b/kernel/power/suspend_file.c
@@ -737,3 +737,23 @@ static int filewriter_print_debug_stats(
 	return len;
 }
 
+/*
+ * Storage needed
+ *
+ * Returns amount of space in the image header required
+ * for the filewriter's data.
+ *
+ * We ensure the space is allocated, but actually save the
+ * data from write_header_init and therefore don't also define a
+ * save_config_info routine.
+ */
+static unsigned long filewriter_storage_needed(void)
+{
+	return sig_size + strlen(filewriter_target) + 1 +
+		3 * sizeof(struct extent_iterate_saved_state) +
+		sizeof(devinfo) +
+		sizeof(struct extent_chain) - 2 * sizeof(void *) +
+		(2 * sizeof(unsigned long) *
+		 (block_chain.allocs - block_chain.frees));
+}
+

--
Nigel Cunningham		nigel at suspend2 dot net
-
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