pnfsblock: merge extents
Replace a stub, so that extents underlying the layouts are properly
added, merged, or ignored as necessary.
Signed-off-by: Fred Isaman <iisaman@citi.umich.edu>
[pnfsblock: delete the new node before put it]
Signed-off-by: Mingyang Guo <guomingyang@nrchpc.ac.cn>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Peng Tao <peng_tao@emc.com>
Signed-off-by: Benny Halevy <bhalevy@tonian.com>
Signed-off-by: Jim Rees <rees@umich.edu>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/blocklayout/blocklayout.h b/fs/nfs/blocklayout/blocklayout.h
index 3e05b08..581d8f4 100644
--- a/fs/nfs/blocklayout/blocklayout.h
+++ b/fs/nfs/blocklayout/blocklayout.h
@@ -80,6 +80,14 @@
EXTENT_LISTS = 2,
};
+static inline int bl_choose_list(enum exstate4 state)
+{
+ if (state == PNFS_BLOCK_READ_DATA || state == PNFS_BLOCK_NONE_DATA)
+ return RO_EXTENT;
+ else
+ return RW_EXTENT;
+}
+
struct pnfs_block_layout {
struct pnfs_layout_hdr bl_layout;
struct pnfs_inval_markings bl_inval; /* tracks INVAL->RW transition */
@@ -137,5 +145,10 @@
/* blocklayoutdm.c */
void bl_free_block_dev(struct pnfs_block_dev *bdev);
+/* extents.c */
void bl_put_extent(struct pnfs_block_extent *be);
+struct pnfs_block_extent *bl_alloc_extent(void);
+int bl_add_merge_extent(struct pnfs_block_layout *bl,
+ struct pnfs_block_extent *new);
+
#endif /* FS_NFS_NFS4BLOCKLAYOUT_H */