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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 | 12 | #define FF_FLAGS_NO_LAYOUTCOMMIT 1 |
260074cd | 13 | #define FF_FLAGS_NO_IO_THRU_MDS 2 |
c0f5f505 | 14 | |
d67ae825 TH |
15 | #include "../pnfs.h" |
16 | ||
17 | /* XXX: Let's filter out insanely large mirror count for now to avoid oom | |
18 | * due to network error etc. */ | |
19 | #define NFS4_FLEXFILE_LAYOUT_MAX_MIRROR_CNT 4096 | |
20 | ||
97ba375b PT |
21 | /* LAYOUTSTATS report interval in ms */ |
22 | #define FF_LAYOUTSTATS_REPORT_INTERVAL (60000L) | |
23 | ||
d67ae825 TH |
24 | struct nfs4_ff_ds_version { |
25 | u32 version; | |
26 | u32 minor_version; | |
27 | u32 rsize; | |
28 | u32 wsize; | |
29 | bool tightly_coupled; | |
30 | }; | |
31 | ||
32 | /* chained in global deviceid hlist */ | |
33 | struct nfs4_ff_layout_ds { | |
34 | struct nfs4_deviceid_node id_node; | |
35 | u32 ds_versions_cnt; | |
36 | struct nfs4_ff_ds_version *ds_versions; | |
37 | struct nfs4_pnfs_ds *ds; | |
38 | }; | |
39 | ||
40 | struct nfs4_ff_layout_ds_err { | |
41 | struct list_head list; /* linked in mirror error_list */ | |
42 | u64 offset; | |
43 | u64 length; | |
44 | int status; | |
45 | enum nfs_opnum4 opnum; | |
46 | nfs4_stateid stateid; | |
47 | struct nfs4_deviceid deviceid; | |
48 | }; | |
49 | ||
abcb7bfc TM |
50 | struct nfs4_ff_io_stat { |
51 | __u64 ops_requested; | |
52 | __u64 bytes_requested; | |
53 | __u64 ops_completed; | |
54 | __u64 bytes_completed; | |
55 | __u64 bytes_not_delivered; | |
56 | ktime_t total_busy_time; | |
57 | ktime_t aggregate_completion_time; | |
58 | }; | |
59 | ||
60 | struct nfs4_ff_busy_timer { | |
61 | ktime_t start_time; | |
62 | atomic_t n_ops; | |
63 | }; | |
64 | ||
65 | struct nfs4_ff_layoutstat { | |
66 | struct nfs4_ff_io_stat io_stat; | |
67 | struct nfs4_ff_busy_timer busy_timer; | |
68 | }; | |
69 | ||
d67ae825 | 70 | struct nfs4_ff_layout_mirror { |
266d12d4 TM |
71 | struct pnfs_layout_hdr *layout; |
72 | struct list_head mirrors; | |
d67ae825 TH |
73 | u32 ds_count; |
74 | u32 efficiency; | |
75 | struct nfs4_ff_layout_ds *mirror_ds; | |
76 | u32 fh_versions_cnt; | |
77 | struct nfs_fh *fh_versions; | |
78 | nfs4_stateid stateid; | |
d67ae825 TH |
79 | u32 uid; |
80 | u32 gid; | |
81 | struct rpc_cred *cred; | |
28a0d72c | 82 | atomic_t ref; |
d67ae825 | 83 | spinlock_t lock; |
abcb7bfc TM |
84 | struct nfs4_ff_layoutstat read_stat; |
85 | struct nfs4_ff_layoutstat write_stat; | |
d983803d | 86 | ktime_t start_time; |
97ba375b | 87 | ktime_t last_report_time; |
d67ae825 TH |
88 | }; |
89 | ||
90 | struct nfs4_ff_layout_segment { | |
91 | struct pnfs_layout_segment generic_hdr; | |
92 | u64 stripe_unit; | |
c0f5f505 | 93 | u32 flags; |
d67ae825 TH |
94 | u32 mirror_array_cnt; |
95 | struct nfs4_ff_layout_mirror **mirror_array; | |
96 | }; | |
97 | ||
98 | struct nfs4_flexfile_layout { | |
99 | struct pnfs_layout_hdr generic_hdr; | |
100 | struct pnfs_ds_commit_info commit_info; | |
266d12d4 | 101 | struct list_head mirrors; |
d67ae825 TH |
102 | struct list_head error_list; /* nfs4_ff_layout_ds_err */ |
103 | }; | |
104 | ||
105 | static inline struct nfs4_flexfile_layout * | |
106 | FF_LAYOUT_FROM_HDR(struct pnfs_layout_hdr *lo) | |
107 | { | |
108 | return container_of(lo, struct nfs4_flexfile_layout, generic_hdr); | |
109 | } | |
110 | ||
111 | static inline struct nfs4_ff_layout_segment * | |
112 | FF_LAYOUT_LSEG(struct pnfs_layout_segment *lseg) | |
113 | { | |
114 | return container_of(lseg, | |
115 | struct nfs4_ff_layout_segment, | |
116 | generic_hdr); | |
117 | } | |
118 | ||
119 | static inline struct nfs4_deviceid_node * | |
120 | FF_LAYOUT_DEVID_NODE(struct pnfs_layout_segment *lseg, u32 idx) | |
121 | { | |
122 | if (idx >= FF_LAYOUT_LSEG(lseg)->mirror_array_cnt || | |
123 | FF_LAYOUT_LSEG(lseg)->mirror_array[idx] == NULL || | |
124 | FF_LAYOUT_LSEG(lseg)->mirror_array[idx]->mirror_ds == NULL) | |
125 | return NULL; | |
126 | return &FF_LAYOUT_LSEG(lseg)->mirror_array[idx]->mirror_ds->id_node; | |
127 | } | |
128 | ||
129 | static inline struct nfs4_ff_layout_ds * | |
130 | FF_LAYOUT_MIRROR_DS(struct nfs4_deviceid_node *node) | |
131 | { | |
132 | return container_of(node, struct nfs4_ff_layout_ds, id_node); | |
133 | } | |
134 | ||
135 | static inline struct nfs4_ff_layout_mirror * | |
136 | FF_LAYOUT_COMP(struct pnfs_layout_segment *lseg, u32 idx) | |
137 | { | |
138 | if (idx >= FF_LAYOUT_LSEG(lseg)->mirror_array_cnt) | |
139 | return NULL; | |
140 | return FF_LAYOUT_LSEG(lseg)->mirror_array[idx]; | |
141 | } | |
142 | ||
143 | static inline u32 | |
144 | FF_LAYOUT_MIRROR_COUNT(struct pnfs_layout_segment *lseg) | |
145 | { | |
146 | return FF_LAYOUT_LSEG(lseg)->mirror_array_cnt; | |
147 | } | |
148 | ||
260074cd TM |
149 | static inline bool |
150 | ff_layout_no_fallback_to_mds(struct pnfs_layout_segment *lseg) | |
151 | { | |
152 | return FF_LAYOUT_LSEG(lseg)->flags & FF_FLAGS_NO_IO_THRU_MDS; | |
153 | } | |
154 | ||
d67ae825 TH |
155 | static inline bool |
156 | ff_layout_test_devid_unavailable(struct nfs4_deviceid_node *node) | |
157 | { | |
158 | return nfs4_test_deviceid_unavailable(node); | |
159 | } | |
160 | ||
161 | static inline int | |
162 | nfs4_ff_layout_ds_version(struct pnfs_layout_segment *lseg, u32 ds_idx) | |
163 | { | |
164 | return FF_LAYOUT_COMP(lseg, ds_idx)->mirror_ds->ds_versions[0].version; | |
165 | } | |
166 | ||
167 | struct nfs4_ff_layout_ds * | |
168 | nfs4_ff_alloc_deviceid_node(struct nfs_server *server, struct pnfs_device *pdev, | |
169 | gfp_t gfp_flags); | |
170 | void nfs4_ff_layout_put_deviceid(struct nfs4_ff_layout_ds *mirror_ds); | |
171 | void nfs4_ff_layout_free_deviceid(struct nfs4_ff_layout_ds *mirror_ds); | |
172 | int ff_layout_track_ds_error(struct nfs4_flexfile_layout *flo, | |
173 | struct nfs4_ff_layout_mirror *mirror, u64 offset, | |
174 | u64 length, int status, enum nfs_opnum4 opnum, | |
175 | gfp_t gfp_flags); | |
176 | int ff_layout_encode_ds_ioerr(struct nfs4_flexfile_layout *flo, | |
177 | struct xdr_stream *xdr, int *count, | |
178 | const struct pnfs_layout_range *range); | |
179 | struct nfs_fh * | |
180 | nfs4_ff_layout_select_ds_fh(struct pnfs_layout_segment *lseg, u32 mirror_idx); | |
181 | ||
182 | struct nfs4_pnfs_ds * | |
183 | nfs4_ff_layout_prepare_ds(struct pnfs_layout_segment *lseg, u32 ds_idx, | |
184 | bool fail_return); | |
185 | ||
186 | struct rpc_clnt * | |
187 | nfs4_ff_find_or_create_ds_client(struct pnfs_layout_segment *lseg, | |
188 | u32 ds_idx, | |
189 | struct nfs_client *ds_clp, | |
190 | struct inode *inode); | |
191 | struct rpc_cred *ff_layout_get_ds_cred(struct pnfs_layout_segment *lseg, | |
192 | u32 ds_idx, struct rpc_cred *mdscred); | |
193 | bool ff_layout_has_available_ds(struct pnfs_layout_segment *lseg); | |
194 | #endif /* FS_NFS_NFS4FLEXFILELAYOUT_H */ |