#define PAGE_CACHE_SECTOR_SHIFT (PAGE_CACHE_SHIFT - SECTOR_SHIFT)
#define SECTOR_SIZE (1 << SECTOR_SHIFT)
+struct pnfs_block_dev;
+
+enum pnfs_block_volume_type {
+ PNFS_BLOCK_VOLUME_SIMPLE = 0,
+ PNFS_BLOCK_VOLUME_SLICE = 1,
+ PNFS_BLOCK_VOLUME_CONCAT = 2,
+ PNFS_BLOCK_VOLUME_STRIPE = 3,
+};
+
+#define PNFS_BLOCK_MAX_UUIDS 4
+#define PNFS_BLOCK_MAX_DEVICES 64
+
+/*
+ * Random upper cap for the uuid length to avoid unbounded allocation.
+ * Not actually limited by the protocol.
+ */
+#define PNFS_BLOCK_UUID_LEN 128
+
+
+struct pnfs_block_volume {
+ enum pnfs_block_volume_type type;
+ union {
+ struct {
+ int len;
+ int nr_sigs;
+ struct {
+ u64 offset;
+ u32 sig_len;
+ u8 sig[PNFS_BLOCK_UUID_LEN];
+ } sigs[PNFS_BLOCK_MAX_UUIDS];
+ } simple;
+ struct {
+ u64 start;
+ u64 len;
+ u32 volume;
+ } slice;
+ struct {
+ u32 volumes_count;
+ u32 volumes[PNFS_BLOCK_MAX_DEVICES];
+ } concat;
+ struct {
+ u64 chunk_size;
+ u32 volumes_count;
+ u32 volumes[PNFS_BLOCK_MAX_DEVICES];
+ } stripe;
+ };
+};
+
+struct pnfs_block_dev_map {
+ sector_t start;
+ sector_t len;
+
+ sector_t disk_offset;
+ struct block_device *bdev;
+};
+
struct pnfs_block_dev {
- struct nfs4_deviceid_node d_node;
- struct block_device *d_bdev;
+ struct nfs4_deviceid_node node;
+
+ u64 start;
+ u64 len;
+
+ u32 nr_children;
+ struct pnfs_block_dev *children;
+ u64 chunk_size;
+
+ struct block_device *bdev;
+ u64 disk_offset;
+
+ bool (*map)(struct pnfs_block_dev *dev, u64 offset,
+ struct pnfs_block_dev_map *map);
};
enum exstate4 {
unsigned int be_tag;
};
+/* on the wire size of the extent */
+#define BL_EXTENT_SIZE (7 * sizeof(__be32) + NFS4_DEVICEID4_SIZE)
+
struct pnfs_block_layout {
struct pnfs_layout_hdr bl_layout;
struct rb_root bl_ext_rw;
#define BL_DEVICE_REQUEST_PROC 0x1 /* User level process succeeds */
#define BL_DEVICE_REQUEST_ERR 0x2 /* User level process fails */
-/* blocklayoutdev.c */
-ssize_t bl_pipe_downcall(struct file *, const char __user *, size_t);
-void bl_pipe_destroy_msg(struct rpc_pipe_msg *);
-int nfs4_blk_process_layoutget(struct pnfs_layout_hdr *lo,
- struct nfs4_layoutget_res *lgr, gfp_t gfp_flags);
-
+/* dev.c */
struct nfs4_deviceid_node *bl_alloc_deviceid_node(struct nfs_server *server,
struct pnfs_device *pdev, gfp_t gfp_mask);
void bl_free_deviceid_node(struct nfs4_deviceid_node *d);
-/* blocklayoutdm.c */
-void bl_dm_remove(struct net *net, dev_t dev);
-
/* extent_tree.c */
int ext_tree_insert(struct pnfs_block_layout *bl,
struct pnfs_block_extent *new);
sector_t len);
bool ext_tree_lookup(struct pnfs_block_layout *bl, sector_t isect,
struct pnfs_block_extent *ret, bool rw);
-int ext_tree_encode_commit(struct pnfs_block_layout *bl,
- struct xdr_stream *xdr);
-void ext_tree_mark_committed(struct pnfs_block_layout *bl, int status);
+int ext_tree_prepare_commit(struct nfs4_layoutcommit_args *arg);
+void ext_tree_mark_committed(struct nfs4_layoutcommit_args *arg, int status);
+
+/* rpc_pipefs.c */
+dev_t bl_resolve_deviceid(struct nfs_server *server,
+ struct pnfs_block_volume *b, gfp_t gfp_mask);
+int __init bl_init_pipefs(void);
+void __exit bl_cleanup_pipefs(void);
#endif /* FS_NFS_NFS4BLOCKLAYOUT_H */