/* * linux/fs/nfs/blocklayout/blocklayout.h * * Module for the NFSv4.1 pNFS block layout driver. * * Copyright (c) 2006 The Regents of the University of Michigan. * All rights reserved. * * Andy Adamson <[email protected]> * Fred Isaman <[email protected]> * * permission is granted to use, copy, create derivative works and * redistribute this software and such derivative works for any purpose, * so long as the name of the university of michigan is not used in * any advertising or publicity pertaining to the use or distribution * of this software without specific, written prior authorization. if * the above copyright notice or any other identification of the * university of michigan is included in any copy of any portion of * this software, then the disclaimer below must also be included. * * this software is provided as is, without representation from the * university of michigan as to its fitness for any purpose, and without * warranty by the university of michigan of any kind, either express * or implied, including without limitation the implied warranties of * merchantability and fitness for a particular purpose. the regents * of the university of michigan shall not be liable for any damages, * including special, indirect, incidental, or consequential damages, * with respect to any claim arising out or in connection with the use * of the software, even if it has been or is hereafter advised of the * possibility of such damages. */ #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 … #define PAGE_CACHE_SECTOR_SHIFT … #define SECTOR_SIZE … struct pnfs_block_dev; #define PNFS_BLOCK_MAX_UUIDS … #define PNFS_BLOCK_MAX_DEVICES … /* * Random upper cap for the uuid length to avoid unbounded allocation. * Not actually limited by the protocol. */ #define PNFS_BLOCK_UUID_LEN … struct pnfs_block_volume { … }; struct pnfs_block_dev_map { … }; struct pnfs_block_dev { … }; /* pnfs_block_dev flag bits */ enum { … }; /* sector_t fields are all in 512-byte sectors */ struct pnfs_block_extent { … }; struct pnfs_block_layout { … }; static inline struct pnfs_block_layout * BLK_LO2EXT(struct pnfs_layout_hdr *lo) { … } static inline struct pnfs_block_layout * BLK_LSEG2EXT(struct pnfs_layout_segment *lseg) { … } struct bl_pipe_msg { … }; struct bl_msg_hdr { … }; #define BL_DEVICE_UMOUNT … #define BL_DEVICE_MOUNT … #define BL_DEVICE_REQUEST_INIT … #define BL_DEVICE_REQUEST_PROC … #define BL_DEVICE_REQUEST_ERR … /* dev.c */ bool bl_register_dev(struct pnfs_block_dev *d); 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); /* extent_tree.c */ 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); /* 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 bl_cleanup_pipefs(void); #endif /* FS_NFS_NFS4BLOCKLAYOUT_H */
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