pnfs-obj: objlayout_encode_layoutcommit implementation
* Define API for io-engines to report delta_space_used in IOs
* Encode the osd-layout specific information of the layoutcommit
XDR buffer.
Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
diff --git a/fs/nfs/objlayout/objlayout.h b/fs/nfs/objlayout/objlayout.h
index b0bb975..a8244c8 100644
--- a/fs/nfs/objlayout/objlayout.h
+++ b/fs/nfs/objlayout/objlayout.h
@@ -51,6 +51,14 @@
struct objlayout {
struct pnfs_layout_hdr pnfs_layout;
+ /* for layout_commit */
+ enum osd_delta_space_valid_enum {
+ OBJ_DSU_INIT = 0,
+ OBJ_DSU_VALID,
+ OBJ_DSU_INVALID,
+ } delta_space_valid;
+ s64 delta_space_used; /* consumed by write ops */
+
/* for layout_return */
spinlock_t lock;
struct list_head err_list;
@@ -119,6 +127,23 @@
unsigned index, struct pnfs_osd_objid *pooid,
int osd_error, u64 offset, u64 length, bool is_write);
+static inline void
+objlayout_add_delta_space_used(struct objlayout_io_state *state, s64 space_used)
+{
+ struct objlayout *objlay = OBJLAYOUT(state->lseg->pls_layout);
+
+ /* If one of the I/Os errored out and the delta_space_used was
+ * invalid we render the complete report as invalid. Protocol mandate
+ * the DSU be accurate or not reported.
+ */
+ spin_lock(&objlay->lock);
+ if (objlay->delta_space_valid != OBJ_DSU_INVALID) {
+ objlay->delta_space_valid = OBJ_DSU_VALID;
+ objlay->delta_space_used += space_used;
+ }
+ spin_unlock(&objlay->lock);
+}
+
extern void objlayout_read_done(struct objlayout_io_state *state,
ssize_t status, bool sync);
extern void objlayout_write_done(struct objlayout_io_state *state,
@@ -149,6 +174,11 @@
struct nfs_write_data *,
int how);
+extern void objlayout_encode_layoutcommit(
+ struct pnfs_layout_hdr *,
+ struct xdr_stream *,
+ const struct nfs4_layoutcommit_args *);
+
extern void objlayout_encode_layoutreturn(
struct pnfs_layout_hdr *,
struct xdr_stream *,