Release 4.11 fs/nfs/filelayout/filelayout.h
/*
* 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 up to 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
};
struct nfs4_file_layout_dsaddr {
struct nfs4_deviceid_node id_node;
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_deviceid deviceid;
struct nfs4_file_layout_dsaddr *dsaddr; /* Point to GETDEVINFO data */
unsigned int num_fh;
struct nfs_fh **fh_array;
};
struct nfs4_filelayout {
struct pnfs_layout_hdr generic_hdr;
struct pnfs_ds_commit_info commit_info;
};
static inline struct nfs4_filelayout *
FILELAYOUT_FROM_HDR(struct pnfs_layout_hdr *lo)
{
return container_of(lo, struct nfs4_filelayout, generic_hdr);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Fred Isaman | 22 | 88.00% | 1 | 50.00% |
| Andy Adamson | 3 | 12.00% | 1 | 50.00% |
| Total | 25 | 100.00% | 2 | 100.00% |
static inline struct nfs4_filelayout_segment *
FILELAYOUT_LSEG(struct pnfs_layout_segment *lseg)
{
return container_of(lseg,
struct nfs4_filelayout_segment,
generic_hdr);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Andy Adamson | 22 | 88.00% | 1 | 50.00% |
| Fred Isaman | 3 | 12.00% | 1 | 50.00% |
| Total | 25 | 100.00% | 2 | 100.00% |
static inline struct nfs4_deviceid_node *
FILELAYOUT_DEVID_NODE(struct pnfs_layout_segment *lseg)
{
return &FILELAYOUT_LSEG(lseg)->dsaddr->id_node;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Andy Adamson | 25 | 100.00% | 1 | 100.00% |
| Total | 25 | 100.00% | 1 | 100.00% |
static inline bool
filelayout_test_devid_invalid(struct nfs4_deviceid_node *node)
{
return test_bit(NFS_DEVICEID_INVALID, &node->flags);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Andy Adamson | 23 | 100.00% | 1 | 100.00% |
| Total | 23 | 100.00% | 1 | 100.00% |
extern bool
filelayout_test_devid_unavailable(struct nfs4_deviceid_node *node);
extern struct nfs_fh *
nfs4_fl_select_ds_fh(struct pnfs_layout_segment *lseg, u32 j);
u32 nfs4_fl_calc_j_index(struct pnfs_layout_segment *lseg, loff_t offset);
u32 nfs4_fl_calc_ds_index(struct pnfs_layout_segment *lseg, u32 j);
struct nfs4_pnfs_ds *nfs4_fl_prepare_ds(struct pnfs_layout_segment *lseg,
u32 ds_idx);
extern struct nfs4_file_layout_dsaddr *
nfs4_fl_alloc_deviceid_node(struct nfs_server *server,
struct pnfs_device *pdev, gfp_t gfp_flags);
extern void nfs4_fl_put_deviceid(struct nfs4_file_layout_dsaddr *dsaddr);
extern void nfs4_fl_free_deviceid(struct nfs4_file_layout_dsaddr *dsaddr);
#endif /* FS_NFS_NFS4FILELAYOUT_H */
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Andy Adamson | 184 | 57.50% | 5 | 29.41% |
| Fred Isaman | 90 | 28.12% | 4 | 23.53% |
| Christoph Hellwig | 27 | 8.44% | 2 | 11.76% |
| Benny Halevy | 11 | 3.44% | 2 | 11.76% |
| Trond Myklebust | 6 | 1.88% | 2 | 11.76% |
| Lucas De Marchi | 1 | 0.31% | 1 | 5.88% |
| Tom Haynes | 1 | 0.31% | 1 | 5.88% |
| Total | 320 | 100.00% | 17 | 100.00% |
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.