]>
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 | ||
b5968725 | 33 | #include "../pnfs.h" |
16b374ca AA |
34 | |
35 | /* | |
25985edc | 36 | * Field testing shows we need to support up to 4096 stripe indices. |
16b374ca AA |
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 | ||
16b374ca | 49 | struct nfs4_file_layout_dsaddr { |
a1eaecbc | 50 | struct nfs4_deviceid_node id_node; |
16b374ca AA |
51 | u32 stripe_count; |
52 | u8 *stripe_indices; | |
53 | u32 ds_num; | |
54 | struct nfs4_pnfs_ds *ds_list[1]; | |
55 | }; | |
56 | ||
57 | struct nfs4_filelayout_segment { | |
551afbb8 AA |
58 | struct pnfs_layout_segment generic_hdr; |
59 | u32 stripe_type; | |
60 | u32 commit_through_mds; | |
61 | u32 stripe_unit; | |
62 | u32 first_stripe_index; | |
63 | u64 pattern_offset; | |
629dc870 | 64 | struct nfs4_deviceid deviceid; |
551afbb8 AA |
65 | struct nfs4_file_layout_dsaddr *dsaddr; /* Point to GETDEVINFO data */ |
66 | unsigned int num_fh; | |
67 | struct nfs_fh **fh_array; | |
16b374ca AA |
68 | }; |
69 | ||
799ba8d5 FI |
70 | struct nfs4_filelayout { |
71 | struct pnfs_layout_hdr generic_hdr; | |
ea2cf228 | 72 | struct pnfs_ds_commit_info commit_info; |
799ba8d5 FI |
73 | }; |
74 | ||
75 | static inline struct nfs4_filelayout * | |
76 | FILELAYOUT_FROM_HDR(struct pnfs_layout_hdr *lo) | |
77 | { | |
78 | return container_of(lo, struct nfs4_filelayout, generic_hdr); | |
79 | } | |
80 | ||
16b374ca AA |
81 | static inline struct nfs4_filelayout_segment * |
82 | FILELAYOUT_LSEG(struct pnfs_layout_segment *lseg) | |
83 | { | |
84 | return container_of(lseg, | |
85 | struct nfs4_filelayout_segment, | |
86 | generic_hdr); | |
87 | } | |
88 | ||
c47abcf8 AA |
89 | static inline struct nfs4_deviceid_node * |
90 | FILELAYOUT_DEVID_NODE(struct pnfs_layout_segment *lseg) | |
91 | { | |
92 | return &FILELAYOUT_LSEG(lseg)->dsaddr->id_node; | |
93 | } | |
94 | ||
554d458d AA |
95 | static inline bool |
96 | filelayout_test_devid_invalid(struct nfs4_deviceid_node *node) | |
97 | { | |
98 | return test_bit(NFS_DEVICEID_INVALID, &node->flags); | |
99 | } | |
100 | ||
1dfed273 TM |
101 | extern bool |
102 | filelayout_test_devid_unavailable(struct nfs4_deviceid_node *node); | |
041245c8 | 103 | |
cfe7f412 FI |
104 | extern struct nfs_fh * |
105 | nfs4_fl_select_ds_fh(struct pnfs_layout_segment *lseg, u32 j); | |
106 | ||
cfe7f412 FI |
107 | u32 nfs4_fl_calc_j_index(struct pnfs_layout_segment *lseg, loff_t offset); |
108 | u32 nfs4_fl_calc_ds_index(struct pnfs_layout_segment *lseg, u32 j); | |
109 | struct nfs4_pnfs_ds *nfs4_fl_prepare_ds(struct pnfs_layout_segment *lseg, | |
110 | u32 ds_idx); | |
661373b1 CH |
111 | |
112 | extern struct nfs4_file_layout_dsaddr * | |
113 | nfs4_fl_alloc_deviceid_node(struct nfs_server *server, | |
114 | struct pnfs_device *pdev, gfp_t gfp_flags); | |
ea8eecdd | 115 | extern void nfs4_fl_put_deviceid(struct nfs4_file_layout_dsaddr *dsaddr); |
1775bc34 | 116 | extern void nfs4_fl_free_deviceid(struct nfs4_file_layout_dsaddr *dsaddr); |
16b374ca AA |
117 | |
118 | #endif /* FS_NFS_NFS4FILELAYOUT_H */ |