1
2
3
4
5
6
7
8
9#ifndef FS_NFS_NFS4FLEXFILELAYOUT_H
10#define FS_NFS_NFS4FLEXFILELAYOUT_H
11
12#include "../pnfs.h"
13
14
15
16#define NFS4_FLEXFILE_LAYOUT_MAX_MIRROR_CNT 4096
17
18struct nfs4_ff_ds_version {
19 u32 version;
20 u32 minor_version;
21 u32 rsize;
22 u32 wsize;
23 bool tightly_coupled;
24};
25
26
27struct nfs4_ff_layout_ds {
28 struct nfs4_deviceid_node id_node;
29 u32 ds_versions_cnt;
30 struct nfs4_ff_ds_version *ds_versions;
31 struct nfs4_pnfs_ds *ds;
32};
33
34struct nfs4_ff_layout_ds_err {
35 struct list_head list;
36 u64 offset;
37 u64 length;
38 int status;
39 enum nfs_opnum4 opnum;
40 nfs4_stateid stateid;
41 struct nfs4_deviceid deviceid;
42};
43
44struct nfs4_ff_layout_mirror {
45 u32 ds_count;
46 u32 efficiency;
47 struct nfs4_ff_layout_ds *mirror_ds;
48 u32 fh_versions_cnt;
49 struct nfs_fh *fh_versions;
50 nfs4_stateid stateid;
51 struct nfs4_string user_name;
52 struct nfs4_string group_name;
53 u32 uid;
54 u32 gid;
55 struct rpc_cred *cred;
56 spinlock_t lock;
57};
58
59struct nfs4_ff_layout_segment {
60 struct pnfs_layout_segment generic_hdr;
61 u64 stripe_unit;
62 u32 mirror_array_cnt;
63 struct nfs4_ff_layout_mirror **mirror_array;
64};
65
66struct nfs4_flexfile_layout {
67 struct pnfs_layout_hdr generic_hdr;
68 struct pnfs_ds_commit_info commit_info;
69 struct list_head error_list;
70};
71
72static inline struct nfs4_flexfile_layout *
73FF_LAYOUT_FROM_HDR(struct pnfs_layout_hdr *lo)
74{
75 return container_of(lo, struct nfs4_flexfile_layout, generic_hdr);
76}
77
78static inline struct nfs4_ff_layout_segment *
79FF_LAYOUT_LSEG(struct pnfs_layout_segment *lseg)
80{
81 return container_of(lseg,
82 struct nfs4_ff_layout_segment,
83 generic_hdr);
84}
85
86static inline struct nfs4_deviceid_node *
87FF_LAYOUT_DEVID_NODE(struct pnfs_layout_segment *lseg, u32 idx)
88{
89 if (idx >= FF_LAYOUT_LSEG(lseg)->mirror_array_cnt ||
90 FF_LAYOUT_LSEG(lseg)->mirror_array[idx] == NULL ||
91 FF_LAYOUT_LSEG(lseg)->mirror_array[idx]->mirror_ds == NULL)
92 return NULL;
93 return &FF_LAYOUT_LSEG(lseg)->mirror_array[idx]->mirror_ds->id_node;
94}
95
96static inline struct nfs4_ff_layout_ds *
97FF_LAYOUT_MIRROR_DS(struct nfs4_deviceid_node *node)
98{
99 return container_of(node, struct nfs4_ff_layout_ds, id_node);
100}
101
102static inline struct nfs4_ff_layout_mirror *
103FF_LAYOUT_COMP(struct pnfs_layout_segment *lseg, u32 idx)
104{
105 if (idx >= FF_LAYOUT_LSEG(lseg)->mirror_array_cnt)
106 return NULL;
107 return FF_LAYOUT_LSEG(lseg)->mirror_array[idx];
108}
109
110static inline u32
111FF_LAYOUT_MIRROR_COUNT(struct pnfs_layout_segment *lseg)
112{
113 return FF_LAYOUT_LSEG(lseg)->mirror_array_cnt;
114}
115
116static inline bool
117ff_layout_test_devid_unavailable(struct nfs4_deviceid_node *node)
118{
119 return nfs4_test_deviceid_unavailable(node);
120}
121
122static inline int
123nfs4_ff_layout_ds_version(struct pnfs_layout_segment *lseg, u32 ds_idx)
124{
125 return FF_LAYOUT_COMP(lseg, ds_idx)->mirror_ds->ds_versions[0].version;
126}
127
128struct nfs4_ff_layout_ds *
129nfs4_ff_alloc_deviceid_node(struct nfs_server *server, struct pnfs_device *pdev,
130 gfp_t gfp_flags);
131void nfs4_ff_layout_put_deviceid(struct nfs4_ff_layout_ds *mirror_ds);
132void nfs4_ff_layout_free_deviceid(struct nfs4_ff_layout_ds *mirror_ds);
133int ff_layout_track_ds_error(struct nfs4_flexfile_layout *flo,
134 struct nfs4_ff_layout_mirror *mirror, u64 offset,
135 u64 length, int status, enum nfs_opnum4 opnum,
136 gfp_t gfp_flags);
137int ff_layout_encode_ds_ioerr(struct nfs4_flexfile_layout *flo,
138 struct xdr_stream *xdr, int *count,
139 const struct pnfs_layout_range *range);
140struct nfs_fh *
141nfs4_ff_layout_select_ds_fh(struct pnfs_layout_segment *lseg, u32 mirror_idx);
142
143struct nfs4_pnfs_ds *
144nfs4_ff_layout_prepare_ds(struct pnfs_layout_segment *lseg, u32 ds_idx,
145 bool fail_return);
146
147struct rpc_clnt *
148nfs4_ff_find_or_create_ds_client(struct pnfs_layout_segment *lseg,
149 u32 ds_idx,
150 struct nfs_client *ds_clp,
151 struct inode *inode);
152struct rpc_cred *ff_layout_get_ds_cred(struct pnfs_layout_segment *lseg,
153 u32 ds_idx, struct rpc_cred *mdscred);
154bool ff_layout_has_available_ds(struct pnfs_layout_segment *lseg);
155#endif
156
