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- #ifndef FS_NFS_NFS4BLOCKLAYOUT_H
- #define FS_NFS_NFS4BLOCKLAYOUT_H
- #include <linux/device-mapper.h>
- #include <linux/nfs_fs.h>
- #include <linux/sunrpc/rpc_pipe_fs.h>
- #include "../nfs4_fs.h"
- #include "../pnfs.h"
- #include "../netns.h"
- #define PAGE_CACHE_SECTORS (PAGE_SIZE >> SECTOR_SHIFT)
- #define PAGE_CACHE_SECTOR_SHIFT (PAGE_SHIFT - SECTOR_SHIFT)
- #define SECTOR_SIZE (1 << SECTOR_SHIFT)
- struct pnfs_block_dev;
- #define PNFS_BLOCK_MAX_UUIDS 4
- #define PNFS_BLOCK_MAX_DEVICES 64
- #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 {
- enum scsi_code_set code_set;
- enum scsi_designator_type designator_type;
- int designator_len;
- u8 designator[256];
- u64 pr_key;
- } scsi;
- };
- };
- 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 node;
- u64 start;
- u64 len;
- u32 nr_children;
- struct pnfs_block_dev *children;
- u64 chunk_size;
- struct block_device *bdev;
- u64 disk_offset;
- u64 pr_key;
- bool pr_registered;
- bool (*map)(struct pnfs_block_dev *dev, u64 offset,
- struct pnfs_block_dev_map *map);
- };
- struct pnfs_block_extent {
- union {
- struct rb_node be_node;
- struct list_head be_list;
- };
- struct nfs4_deviceid_node *be_device;
- sector_t be_f_offset;
- sector_t be_length;
- sector_t be_v_offset;
- enum pnfs_block_extent_state be_state;
- #define EXTENT_WRITTEN 1
- #define EXTENT_COMMITTING 2
- unsigned int be_tag;
- };
- struct pnfs_block_layout {
- struct pnfs_layout_hdr bl_layout;
- struct rb_root bl_ext_rw;
- struct rb_root bl_ext_ro;
- spinlock_t bl_ext_lock;
- bool bl_scsi_layout;
- u64 bl_lwb;
- };
- static inline struct pnfs_block_layout *
- BLK_LO2EXT(struct pnfs_layout_hdr *lo)
- {
- return container_of(lo, struct pnfs_block_layout, bl_layout);
- }
- static inline struct pnfs_block_layout *
- BLK_LSEG2EXT(struct pnfs_layout_segment *lseg)
- {
- return BLK_LO2EXT(lseg->pls_layout);
- }
- struct bl_pipe_msg {
- struct rpc_pipe_msg msg;
- wait_queue_head_t *bl_wq;
- };
- struct bl_msg_hdr {
- u8 type;
- u16 totallen;
- };
- #define BL_DEVICE_UMOUNT 0x0
- #define BL_DEVICE_MOUNT 0x1
- #define BL_DEVICE_REQUEST_INIT 0x0
- #define BL_DEVICE_REQUEST_PROC 0x1
- #define BL_DEVICE_REQUEST_ERR 0x2
- 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);
- int ext_tree_insert(struct pnfs_block_layout *bl,
- struct pnfs_block_extent *new);
- int ext_tree_remove(struct pnfs_block_layout *bl, bool rw, sector_t start,
- sector_t end);
- int ext_tree_mark_written(struct pnfs_block_layout *bl, sector_t start,
- sector_t len, u64 lwb);
- bool ext_tree_lookup(struct pnfs_block_layout *bl, sector_t isect,
- struct pnfs_block_extent *ret, bool rw);
- int ext_tree_prepare_commit(struct nfs4_layoutcommit_args *arg);
- void ext_tree_mark_committed(struct nfs4_layoutcommit_args *arg, int status);
- 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 bl_cleanup_pipefs(void);
- #endif
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