Commit | Line | Data |
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d67ae825 TH |
1 | /* |
2 | * NFSv4 flexfile layout driver data structures. | |
3 | * | |
4 | * Copyright (c) 2014, Primary Data, Inc. All rights reserved. | |
5 | * | |
6 | * Tao Peng <bergwolf@primarydata.com> | |
7 | */ | |
8 | ||
9 | #ifndef FS_NFS_NFS4FLEXFILELAYOUT_H | |
10 | #define FS_NFS_NFS4FLEXFILELAYOUT_H | |
11 | ||
c0f5f505 TM |
12 | #define FF_FLAGS_NO_LAYOUTCOMMIT 1 |
13 | ||
d67ae825 TH |
14 | #include "../pnfs.h" |
15 | ||
16 | /* XXX: Let's filter out insanely large mirror count for now to avoid oom | |
17 | * due to network error etc. */ | |
18 | #define NFS4_FLEXFILE_LAYOUT_MAX_MIRROR_CNT 4096 | |
19 | ||
97ba375b PT |
20 | /* LAYOUTSTATS report interval in ms */ |
21 | #define FF_LAYOUTSTATS_REPORT_INTERVAL (60000L) | |
22 | ||
d67ae825 TH |
23 | struct nfs4_ff_ds_version { |
24 | u32 version; | |
25 | u32 minor_version; | |
26 | u32 rsize; | |
27 | u32 wsize; | |
28 | bool tightly_coupled; | |
29 | }; | |
30 | ||
31 | /* chained in global deviceid hlist */ | |
32 | struct nfs4_ff_layout_ds { | |
33 | struct nfs4_deviceid_node id_node; | |
34 | u32 ds_versions_cnt; | |
35 | struct nfs4_ff_ds_version *ds_versions; | |
36 | struct nfs4_pnfs_ds *ds; | |
37 | }; | |
38 | ||
39 | struct nfs4_ff_layout_ds_err { | |
40 | struct list_head list; /* linked in mirror error_list */ | |
41 | u64 offset; | |
42 | u64 length; | |
43 | int status; | |
44 | enum nfs_opnum4 opnum; | |
45 | nfs4_stateid stateid; | |
46 | struct nfs4_deviceid deviceid; | |
47 | }; | |
48 | ||
abcb7bfc TM |
49 | struct nfs4_ff_io_stat { |
50 | __u64 ops_requested; | |
51 | __u64 bytes_requested; | |
52 | __u64 ops_completed; | |
53 | __u64 bytes_completed; | |
54 | __u64 bytes_not_delivered; | |
55 | ktime_t total_busy_time; | |
56 | ktime_t aggregate_completion_time; | |
57 | }; | |
58 | ||
59 | struct nfs4_ff_busy_timer { | |
60 | ktime_t start_time; | |
61 | atomic_t n_ops; | |
62 | }; | |
63 | ||
64 | struct nfs4_ff_layoutstat { | |
65 | struct nfs4_ff_io_stat io_stat; | |
66 | struct nfs4_ff_busy_timer busy_timer; | |
67 | }; | |
68 | ||
d67ae825 TH |
69 | struct nfs4_ff_layout_mirror { |
70 | u32 ds_count; | |
71 | u32 efficiency; | |
72 | struct nfs4_ff_layout_ds *mirror_ds; | |
73 | u32 fh_versions_cnt; | |
74 | struct nfs_fh *fh_versions; | |
75 | nfs4_stateid stateid; | |
d67ae825 TH |
76 | u32 uid; |
77 | u32 gid; | |
78 | struct rpc_cred *cred; | |
28a0d72c | 79 | atomic_t ref; |
d67ae825 | 80 | spinlock_t lock; |
abcb7bfc TM |
81 | struct nfs4_ff_layoutstat read_stat; |
82 | struct nfs4_ff_layoutstat write_stat; | |
d983803d | 83 | ktime_t start_time; |
97ba375b | 84 | ktime_t last_report_time; |
d67ae825 TH |
85 | }; |
86 | ||
87 | struct nfs4_ff_layout_segment { | |
88 | struct pnfs_layout_segment generic_hdr; | |
89 | u64 stripe_unit; | |
c0f5f505 | 90 | u32 flags; |
d67ae825 TH |
91 | u32 mirror_array_cnt; |
92 | struct nfs4_ff_layout_mirror **mirror_array; | |
93 | }; | |
94 | ||
95 | struct nfs4_flexfile_layout { | |
96 | struct pnfs_layout_hdr generic_hdr; | |
97 | struct pnfs_ds_commit_info commit_info; | |
98 | struct list_head error_list; /* nfs4_ff_layout_ds_err */ | |
99 | }; | |
100 | ||
101 | static inline struct nfs4_flexfile_layout * | |
102 | FF_LAYOUT_FROM_HDR(struct pnfs_layout_hdr *lo) | |
103 | { | |
104 | return container_of(lo, struct nfs4_flexfile_layout, generic_hdr); | |
105 | } | |
106 | ||
107 | static inline struct nfs4_ff_layout_segment * | |
108 | FF_LAYOUT_LSEG(struct pnfs_layout_segment *lseg) | |
109 | { | |
110 | return container_of(lseg, | |
111 | struct nfs4_ff_layout_segment, | |
112 | generic_hdr); | |
113 | } | |
114 | ||
115 | static inline struct nfs4_deviceid_node * | |
116 | FF_LAYOUT_DEVID_NODE(struct pnfs_layout_segment *lseg, u32 idx) | |
117 | { | |
118 | if (idx >= FF_LAYOUT_LSEG(lseg)->mirror_array_cnt || | |
119 | FF_LAYOUT_LSEG(lseg)->mirror_array[idx] == NULL || | |
120 | FF_LAYOUT_LSEG(lseg)->mirror_array[idx]->mirror_ds == NULL) | |
121 | return NULL; | |
122 | return &FF_LAYOUT_LSEG(lseg)->mirror_array[idx]->mirror_ds->id_node; | |
123 | } | |
124 | ||
125 | static inline struct nfs4_ff_layout_ds * | |
126 | FF_LAYOUT_MIRROR_DS(struct nfs4_deviceid_node *node) | |
127 | { | |
128 | return container_of(node, struct nfs4_ff_layout_ds, id_node); | |
129 | } | |
130 | ||
131 | static inline struct nfs4_ff_layout_mirror * | |
132 | FF_LAYOUT_COMP(struct pnfs_layout_segment *lseg, u32 idx) | |
133 | { | |
134 | if (idx >= FF_LAYOUT_LSEG(lseg)->mirror_array_cnt) | |
135 | return NULL; | |
136 | return FF_LAYOUT_LSEG(lseg)->mirror_array[idx]; | |
137 | } | |
138 | ||
139 | static inline u32 | |
140 | FF_LAYOUT_MIRROR_COUNT(struct pnfs_layout_segment *lseg) | |
141 | { | |
142 | return FF_LAYOUT_LSEG(lseg)->mirror_array_cnt; | |
143 | } | |
144 | ||
145 | static inline bool | |
146 | ff_layout_test_devid_unavailable(struct nfs4_deviceid_node *node) | |
147 | { | |
148 | return nfs4_test_deviceid_unavailable(node); | |
149 | } | |
150 | ||
151 | static inline int | |
152 | nfs4_ff_layout_ds_version(struct pnfs_layout_segment *lseg, u32 ds_idx) | |
153 | { | |
154 | return FF_LAYOUT_COMP(lseg, ds_idx)->mirror_ds->ds_versions[0].version; | |
155 | } | |
156 | ||
157 | struct nfs4_ff_layout_ds * | |
158 | nfs4_ff_alloc_deviceid_node(struct nfs_server *server, struct pnfs_device *pdev, | |
159 | gfp_t gfp_flags); | |
160 | void nfs4_ff_layout_put_deviceid(struct nfs4_ff_layout_ds *mirror_ds); | |
161 | void nfs4_ff_layout_free_deviceid(struct nfs4_ff_layout_ds *mirror_ds); | |
162 | int ff_layout_track_ds_error(struct nfs4_flexfile_layout *flo, | |
163 | struct nfs4_ff_layout_mirror *mirror, u64 offset, | |
164 | u64 length, int status, enum nfs_opnum4 opnum, | |
165 | gfp_t gfp_flags); | |
166 | int ff_layout_encode_ds_ioerr(struct nfs4_flexfile_layout *flo, | |
167 | struct xdr_stream *xdr, int *count, | |
168 | const struct pnfs_layout_range *range); | |
169 | struct nfs_fh * | |
170 | nfs4_ff_layout_select_ds_fh(struct pnfs_layout_segment *lseg, u32 mirror_idx); | |
171 | ||
172 | struct nfs4_pnfs_ds * | |
173 | nfs4_ff_layout_prepare_ds(struct pnfs_layout_segment *lseg, u32 ds_idx, | |
174 | bool fail_return); | |
175 | ||
176 | struct rpc_clnt * | |
177 | nfs4_ff_find_or_create_ds_client(struct pnfs_layout_segment *lseg, | |
178 | u32 ds_idx, | |
179 | struct nfs_client *ds_clp, | |
180 | struct inode *inode); | |
181 | struct rpc_cred *ff_layout_get_ds_cred(struct pnfs_layout_segment *lseg, | |
182 | u32 ds_idx, struct rpc_cred *mdscred); | |
183 | bool ff_layout_has_available_ds(struct pnfs_layout_segment *lseg); | |
184 | #endif /* FS_NFS_NFS4FLEXFILELAYOUT_H */ |