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NFSv4.1: pnfs: filelayout: add driver's LAYOUTGET and GETDEVICEINFO infrastructure

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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 <andros@netapp.com>
Signed-off-by: Dean Hildebrand <dhildebz@umich.edu>
Signed-off-by: Marc Eshel <eshel@almaden.ibm.com>
Signed-off-by: Mike Sager <sager@netapp.com>
Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
Signed-off-by: Ricardo Labiaga <ricardo.labiaga@netapp.com>
Signed-off-by: Tao Guo <guotao@nrchpc.ac.cn>
Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Andy Adamson
2010-10-20 00:18:04 -04:00
committed by Trond Myklebust
parent b1f69b754e
commit 16b374ca43
5 changed files with 747 additions and 2 deletions
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94
fs/nfs/nfs4filelayout.h Normal file
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/*
* NFSv4 file layout driver data structures.
*
* Copyright (c) 2002
* The Regents of the University of Michigan
* All Rights Reserved
*
* Dean Hildebrand <dhildebz@umich.edu>
*
* 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 */