exofs: Add offset/length to exofs_get_io_state
In future raid code we will need to know the IO offset/length
and if it's a read or write to determine some of the array
sizes we'll need.
So add a new exofs_get_rw_state() API for use when
writeing/reading. All other simple cases are left using the
old way.
The major change to this is that now we need to call
exofs_get_io_state later at inode.c::read_exec and
inode.c::write_exec when we actually know these things. So this
patch is kept separate so I can test things apart from other
changes.
Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
diff --git a/fs/exofs/ios.c b/fs/exofs/ios.c
index fbb47ba..096405e5 100644
--- a/fs/exofs/ios.c
+++ b/fs/exofs/ios.c
@@ -69,8 +69,8 @@
return ret;
}
-int exofs_get_io_state(struct exofs_layout *layout,
- struct exofs_io_state **pios)
+int exofs_get_rw_state(struct exofs_layout *layout, bool is_reading,
+ u64 offset, u64 length, struct exofs_io_state **pios)
{
struct exofs_io_state *ios;
@@ -87,10 +87,20 @@
ios->layout = layout;
ios->obj.partition = layout->s_pid;
+ ios->offset = offset;
+ ios->length = length;
+ ios->reading = is_reading;
+
*pios = ios;
return 0;
}
+int exofs_get_io_state(struct exofs_layout *layout,
+ struct exofs_io_state **ios)
+{
+ return exofs_get_rw_state(layout, true, 0, 0, ios);
+}
+
void exofs_put_io_state(struct exofs_io_state *ios)
{
if (ios) {