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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 | ||
98fc685a AA |
35 | /* |
36 | * Default data server connection timeout and retrans vaules. | |
37 | * Set by module paramters dataserver_timeo and dataserver_retrans. | |
38 | */ | |
eb97cbb4 | 39 | #define NFS4_DEF_DS_TIMEO 600 /* in tenths of a second */ |
98fc685a AA |
40 | #define NFS4_DEF_DS_RETRANS 5 |
41 | ||
16b374ca | 42 | /* |
25985edc | 43 | * Field testing shows we need to support up to 4096 stripe indices. |
16b374ca AA |
44 | * We store each index as a u8 (u32 on the wire) to keep the memory footprint |
45 | * reasonable. This in turn means we support a maximum of 256 | |
46 | * RFC 5661 multipath_list4 structures. | |
47 | */ | |
48 | #define NFS4_PNFS_MAX_STRIPE_CNT 4096 | |
49 | #define NFS4_PNFS_MAX_MULTI_CNT 256 /* 256 fit into a u8 stripe_index */ | |
50 | ||
e7dd79af AA |
51 | /* error codes for internal use */ |
52 | #define NFS4ERR_RESET_TO_MDS 12001 | |
53 | ||
16b374ca AA |
54 | enum stripetype4 { |
55 | STRIPE_SPARSE = 1, | |
56 | STRIPE_DENSE = 2 | |
57 | }; | |
58 | ||
59 | /* Individual ip address */ | |
14f9a607 WAA |
60 | struct nfs4_pnfs_ds_addr { |
61 | struct sockaddr_storage da_addr; | |
62 | size_t da_addrlen; | |
63 | struct list_head da_node; /* nfs4_pnfs_dev_hlist dev_dslist */ | |
64 | char *da_remotestr; /* human readable addr+port */ | |
65 | }; | |
66 | ||
16b374ca AA |
67 | struct nfs4_pnfs_ds { |
68 | struct list_head ds_node; /* nfs4_pnfs_dev_hlist dev_dslist */ | |
14f9a607 WAA |
69 | char *ds_remotestr; /* comma sep list of addrs */ |
70 | struct list_head ds_addrs; | |
16b374ca AA |
71 | struct nfs_client *ds_clp; |
72 | atomic_t ds_count; | |
c23266d5 AA |
73 | unsigned long ds_state; |
74 | #define NFS4DS_CONNECTING 0 /* ds is establishing connection */ | |
16b374ca AA |
75 | }; |
76 | ||
77 | struct nfs4_file_layout_dsaddr { | |
a1eaecbc | 78 | struct nfs4_deviceid_node id_node; |
16b374ca AA |
79 | u32 stripe_count; |
80 | u8 *stripe_indices; | |
81 | u32 ds_num; | |
82 | struct nfs4_pnfs_ds *ds_list[1]; | |
83 | }; | |
84 | ||
85 | struct nfs4_filelayout_segment { | |
86 | struct pnfs_layout_segment generic_hdr; | |
87 | u32 stripe_type; | |
88 | u32 commit_through_mds; | |
89 | u32 stripe_unit; | |
90 | u32 first_stripe_index; | |
91 | u64 pattern_offset; | |
92 | struct nfs4_file_layout_dsaddr *dsaddr; /* Point to GETDEVINFO data */ | |
93 | unsigned int num_fh; | |
94 | struct nfs_fh **fh_array; | |
95 | }; | |
96 | ||
799ba8d5 FI |
97 | struct nfs4_filelayout { |
98 | struct pnfs_layout_hdr generic_hdr; | |
ea2cf228 | 99 | struct pnfs_ds_commit_info commit_info; |
799ba8d5 FI |
100 | }; |
101 | ||
102 | static inline struct nfs4_filelayout * | |
103 | FILELAYOUT_FROM_HDR(struct pnfs_layout_hdr *lo) | |
104 | { | |
105 | return container_of(lo, struct nfs4_filelayout, generic_hdr); | |
106 | } | |
107 | ||
16b374ca AA |
108 | static inline struct nfs4_filelayout_segment * |
109 | FILELAYOUT_LSEG(struct pnfs_layout_segment *lseg) | |
110 | { | |
111 | return container_of(lseg, | |
112 | struct nfs4_filelayout_segment, | |
113 | generic_hdr); | |
114 | } | |
115 | ||
c47abcf8 AA |
116 | static inline struct nfs4_deviceid_node * |
117 | FILELAYOUT_DEVID_NODE(struct pnfs_layout_segment *lseg) | |
118 | { | |
119 | return &FILELAYOUT_LSEG(lseg)->dsaddr->id_node; | |
120 | } | |
121 | ||
554d458d AA |
122 | static inline void |
123 | filelayout_mark_devid_invalid(struct nfs4_deviceid_node *node) | |
124 | { | |
125 | u32 *p = (u32 *)&node->deviceid; | |
126 | ||
127 | printk(KERN_WARNING "NFS: Deviceid [%x%x%x%x] marked out of use.\n", | |
128 | p[0], p[1], p[2], p[3]); | |
129 | ||
130 | set_bit(NFS_DEVICEID_INVALID, &node->flags); | |
131 | } | |
132 | ||
133 | static inline bool | |
134 | filelayout_test_devid_invalid(struct nfs4_deviceid_node *node) | |
135 | { | |
136 | return test_bit(NFS_DEVICEID_INVALID, &node->flags); | |
137 | } | |
138 | ||
1dfed273 TM |
139 | extern bool |
140 | filelayout_test_devid_unavailable(struct nfs4_deviceid_node *node); | |
041245c8 | 141 | |
cfe7f412 FI |
142 | extern struct nfs_fh * |
143 | nfs4_fl_select_ds_fh(struct pnfs_layout_segment *lseg, u32 j); | |
144 | ||
16b374ca | 145 | extern void print_ds(struct nfs4_pnfs_ds *ds); |
cfe7f412 FI |
146 | u32 nfs4_fl_calc_j_index(struct pnfs_layout_segment *lseg, loff_t offset); |
147 | u32 nfs4_fl_calc_ds_index(struct pnfs_layout_segment *lseg, u32 j); | |
148 | struct nfs4_pnfs_ds *nfs4_fl_prepare_ds(struct pnfs_layout_segment *lseg, | |
149 | u32 ds_idx); | |
ea8eecdd | 150 | extern void nfs4_fl_put_deviceid(struct nfs4_file_layout_dsaddr *dsaddr); |
1775bc34 | 151 | extern void nfs4_fl_free_deviceid(struct nfs4_file_layout_dsaddr *dsaddr); |
16b374ca | 152 | struct nfs4_file_layout_dsaddr * |
78e4e05c | 153 | filelayout_get_device_info(struct inode *inode, struct nfs4_deviceid *dev_id, gfp_t gfp_flags); |
16b374ca AA |
154 | |
155 | #endif /* FS_NFS_NFS4FILELAYOUT_H */ |