From 16b374ca439fb406e46e071f75428f5b033056f8 Mon Sep 17 00:00:00 2001 From: Andy Adamson Date: Wed, 20 Oct 2010 00:18:04 -0400 Subject: NFSv4.1: pnfs: filelayout: add driver's LAYOUTGET and GETDEVICEINFO infrastructure Implement the driver's io_ops->alloc_lseg and free_lseg functions, which integrate into the deviceid cache and calls out to nfs4_proc_getdeviceinfo when necessary. Signed-off-by: Andy Adamson Signed-off-by: Dean Hildebrand Signed-off-by: Marc Eshel Signed-off-by: Mike Sager Signed-off-by: Oleg Drokin Signed-off-by: Ricardo Labiaga Signed-off-by: Tao Guo Signed-off-by: Boaz Harrosh Signed-off-by: Fred Isaman Signed-off-by: Trond Myklebust --- fs/nfs/nfs4filelayout.h | 94 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 94 insertions(+) create mode 100644 fs/nfs/nfs4filelayout.h (limited to 'fs/nfs/nfs4filelayout.h') diff --git a/fs/nfs/nfs4filelayout.h b/fs/nfs/nfs4filelayout.h new file mode 100644 index 000000000000..bbf60dd2ab9d --- /dev/null +++ b/fs/nfs/nfs4filelayout.h @@ -0,0 +1,94 @@ +/* + * NFSv4 file layout driver data structures. + * + * Copyright (c) 2002 + * The Regents of the University of Michigan + * All Rights Reserved + * + * Dean Hildebrand + * + * 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 or warranty + * of any kind either express or implied, including without limitation + * the implied warranties of merchantability, fitness for a particular + * purpose, or noninfringement. 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 of 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_NFS4FILELAYOUT_H +#define FS_NFS_NFS4FILELAYOUT_H + +#include "pnfs.h" + +/* + * Field testing shows we need to support upto 4096 stripe indices. + * We store each index as a u8 (u32 on the wire) to keep the memory footprint + * reasonable. This in turn means we support a maximum of 256 + * RFC 5661 multipath_list4 structures. + */ +#define NFS4_PNFS_MAX_STRIPE_CNT 4096 +#define NFS4_PNFS_MAX_MULTI_CNT 256 /* 256 fit into a u8 stripe_index */ + +enum stripetype4 { + STRIPE_SPARSE = 1, + STRIPE_DENSE = 2 +}; + +/* Individual ip address */ +struct nfs4_pnfs_ds { + struct list_head ds_node; /* nfs4_pnfs_dev_hlist dev_dslist */ + u32 ds_ip_addr; + u32 ds_port; + struct nfs_client *ds_clp; + atomic_t ds_count; +}; + +struct nfs4_file_layout_dsaddr { + struct pnfs_deviceid_node deviceid; + u32 stripe_count; + u8 *stripe_indices; + u32 ds_num; + struct nfs4_pnfs_ds *ds_list[1]; +}; + +struct nfs4_filelayout_segment { + struct pnfs_layout_segment generic_hdr; + u32 stripe_type; + u32 commit_through_mds; + u32 stripe_unit; + u32 first_stripe_index; + u64 pattern_offset; + struct nfs4_file_layout_dsaddr *dsaddr; /* Point to GETDEVINFO data */ + unsigned int num_fh; + struct nfs_fh **fh_array; +}; + +static inline struct nfs4_filelayout_segment * +FILELAYOUT_LSEG(struct pnfs_layout_segment *lseg) +{ + return container_of(lseg, + struct nfs4_filelayout_segment, + generic_hdr); +} + +extern void nfs4_fl_free_deviceid_callback(struct pnfs_deviceid_node *); +extern void print_ds(struct nfs4_pnfs_ds *ds); +extern void print_deviceid(struct nfs4_deviceid *dev_id); +extern struct nfs4_file_layout_dsaddr * +nfs4_fl_find_get_deviceid(struct nfs_client *, struct nfs4_deviceid *dev_id); +struct nfs4_file_layout_dsaddr * +get_device_info(struct inode *inode, struct nfs4_deviceid *dev_id); + +#endif /* FS_NFS_NFS4FILELAYOUT_H */ -- cgit v1.2.3-55-g7522