]>
Commit | Line | Data |
---|---|---|
16b374ca AA |
1 | /* |
2 | * NFSv4 file layout driver data structures. | |
3 | * | |
4 | * Copyright (c) 2002 | |
5 | * The Regents of the University of Michigan | |
6 | * All Rights Reserved | |
7 | * | |
8 | * Dean Hildebrand <dhildebz@umich.edu> | |
9 | * | |
10 | * Permission is granted to use, copy, create derivative works, and | |
11 | * redistribute this software and such derivative works for any purpose, | |
12 | * so long as the name of the University of Michigan is not used in | |
13 | * any advertising or publicity pertaining to the use or distribution | |
14 | * of this software without specific, written prior authorization. If | |
15 | * the above copyright notice or any other identification of the | |
16 | * University of Michigan is included in any copy of any portion of | |
17 | * this software, then the disclaimer below must also be included. | |
18 | * | |
19 | * This software is provided as is, without representation or warranty | |
20 | * of any kind either express or implied, including without limitation | |
21 | * the implied warranties of merchantability, fitness for a particular | |
22 | * purpose, or noninfringement. The Regents of the University of | |
23 | * Michigan shall not be liable for any damages, including special, | |
24 | * indirect, incidental, or consequential damages, with respect to any | |
25 | * claim arising out of or in connection with the use of the software, | |
26 | * even if it has been or is hereafter advised of the possibility of | |
27 | * such damages. | |
28 | */ | |
29 | ||
30 | #ifndef FS_NFS_NFS4FILELAYOUT_H | |
31 | #define FS_NFS_NFS4FILELAYOUT_H | |
32 | ||
33 | #include "pnfs.h" | |
34 | ||
35 | /* | |
36 | * Field testing shows we need to support upto 4096 stripe indices. | |
37 | * We store each index as a u8 (u32 on the wire) to keep the memory footprint | |
38 | * reasonable. This in turn means we support a maximum of 256 | |
39 | * RFC 5661 multipath_list4 structures. | |
40 | */ | |
41 | #define NFS4_PNFS_MAX_STRIPE_CNT 4096 | |
42 | #define NFS4_PNFS_MAX_MULTI_CNT 256 /* 256 fit into a u8 stripe_index */ | |
43 | ||
44 | enum stripetype4 { | |
45 | STRIPE_SPARSE = 1, | |
46 | STRIPE_DENSE = 2 | |
47 | }; | |
48 | ||
49 | /* Individual ip address */ | |
50 | struct nfs4_pnfs_ds { | |
51 | struct list_head ds_node; /* nfs4_pnfs_dev_hlist dev_dslist */ | |
52 | u32 ds_ip_addr; | |
53 | u32 ds_port; | |
54 | struct nfs_client *ds_clp; | |
55 | atomic_t ds_count; | |
56 | }; | |
57 | ||
58 | struct nfs4_file_layout_dsaddr { | |
59 | struct pnfs_deviceid_node deviceid; | |
60 | u32 stripe_count; | |
61 | u8 *stripe_indices; | |
62 | u32 ds_num; | |
63 | struct nfs4_pnfs_ds *ds_list[1]; | |
64 | }; | |
65 | ||
66 | struct nfs4_filelayout_segment { | |
67 | struct pnfs_layout_segment generic_hdr; | |
68 | u32 stripe_type; | |
69 | u32 commit_through_mds; | |
70 | u32 stripe_unit; | |
71 | u32 first_stripe_index; | |
72 | u64 pattern_offset; | |
73 | struct nfs4_file_layout_dsaddr *dsaddr; /* Point to GETDEVINFO data */ | |
74 | unsigned int num_fh; | |
75 | struct nfs_fh **fh_array; | |
76 | }; | |
77 | ||
78 | static inline struct nfs4_filelayout_segment * | |
79 | FILELAYOUT_LSEG(struct pnfs_layout_segment *lseg) | |
80 | { | |
81 | return container_of(lseg, | |
82 | struct nfs4_filelayout_segment, | |
83 | generic_hdr); | |
84 | } | |
85 | ||
86 | extern void nfs4_fl_free_deviceid_callback(struct pnfs_deviceid_node *); | |
87 | extern void print_ds(struct nfs4_pnfs_ds *ds); | |
88 | extern void print_deviceid(struct nfs4_deviceid *dev_id); | |
89 | extern struct nfs4_file_layout_dsaddr * | |
90 | nfs4_fl_find_get_deviceid(struct nfs_client *, struct nfs4_deviceid *dev_id); | |
91 | struct nfs4_file_layout_dsaddr * | |
92 | get_device_info(struct inode *inode, struct nfs4_deviceid *dev_id); | |
93 | ||
94 | #endif /* FS_NFS_NFS4FILELAYOUT_H */ |