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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
35/*
36 * Default data server connection timeout and retrans vaules.
37 * Set by module paramters dataserver_timeo and dataserver_retrans.
38 */
39#define NFS4_DEF_DS_TIMEO 600 /* in tenths of a second */
40#define NFS4_DEF_DS_RETRANS 5
41
42/*
43 * Field testing shows we need to support up to 4096 stripe indices.
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
51/* error codes for internal use */
52#define NFS4ERR_RESET_TO_MDS 12001
53
54enum stripetype4 {
55 STRIPE_SPARSE = 1,
56 STRIPE_DENSE = 2
57};
58
59/* Individual ip address */
60struct 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
67struct nfs4_pnfs_ds {
68 struct list_head ds_node; /* nfs4_pnfs_dev_hlist dev_dslist */
69 char *ds_remotestr; /* comma sep list of addrs */
70 struct list_head ds_addrs;
71 struct nfs_client *ds_clp;
72 atomic_t ds_count;
73 unsigned long ds_state;
74#define NFS4DS_CONNECTING 0 /* ds is establishing connection */
75};
76
77struct nfs4_file_layout_dsaddr {
78 struct nfs4_deviceid_node id_node;
79 u32 stripe_count;
80 u8 *stripe_indices;
81 u32 ds_num;
82 struct nfs4_pnfs_ds *ds_list[1];
83};
84
85struct 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
97struct nfs4_filelayout {
98 struct pnfs_layout_hdr generic_hdr;
99 struct pnfs_ds_commit_info commit_info;
100};
101
102static inline struct nfs4_filelayout *
103FILELAYOUT_FROM_HDR(struct pnfs_layout_hdr *lo)
104{
105 return container_of(lo, struct nfs4_filelayout, generic_hdr);
106}
107
108static inline struct nfs4_filelayout_segment *
109FILELAYOUT_LSEG(struct pnfs_layout_segment *lseg)
110{
111 return container_of(lseg,
112 struct nfs4_filelayout_segment,
113 generic_hdr);
114}
115
116static inline struct nfs4_deviceid_node *
117FILELAYOUT_DEVID_NODE(struct pnfs_layout_segment *lseg)
118{
119 return &FILELAYOUT_LSEG(lseg)->dsaddr->id_node;
120}
121
122static inline void
123filelayout_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
133static inline bool
134filelayout_test_devid_invalid(struct nfs4_deviceid_node *node)
135{
136 return test_bit(NFS_DEVICEID_INVALID, &node->flags);
137}
138
139extern bool
140filelayout_test_devid_unavailable(struct nfs4_deviceid_node *node);
141
142extern struct nfs_fh *
143nfs4_fl_select_ds_fh(struct pnfs_layout_segment *lseg, u32 j);
144
145extern void print_ds(struct nfs4_pnfs_ds *ds);
146u32 nfs4_fl_calc_j_index(struct pnfs_layout_segment *lseg, loff_t offset);
147u32 nfs4_fl_calc_ds_index(struct pnfs_layout_segment *lseg, u32 j);
148struct nfs4_pnfs_ds *nfs4_fl_prepare_ds(struct pnfs_layout_segment *lseg,
149 u32 ds_idx);
150extern void nfs4_fl_put_deviceid(struct nfs4_file_layout_dsaddr *dsaddr);
151extern void nfs4_fl_free_deviceid(struct nfs4_file_layout_dsaddr *dsaddr);
152struct nfs4_file_layout_dsaddr *
153filelayout_get_device_info(struct inode *inode, struct nfs4_deviceid *dev_id,
154 struct rpc_cred *cred, gfp_t gfp_flags);
155
156#endif /* FS_NFS_NFS4FILELAYOUT_H */
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
35/*
36 * Field testing shows we need to support up to 4096 stripe indices.
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
44enum stripetype4 {
45 STRIPE_SPARSE = 1,
46 STRIPE_DENSE = 2
47};
48
49/* Individual ip address */
50struct nfs4_pnfs_ds_addr {
51 struct sockaddr_storage da_addr;
52 size_t da_addrlen;
53 struct list_head da_node; /* nfs4_pnfs_dev_hlist dev_dslist */
54 char *da_remotestr; /* human readable addr+port */
55};
56
57struct nfs4_pnfs_ds {
58 struct list_head ds_node; /* nfs4_pnfs_dev_hlist dev_dslist */
59 char *ds_remotestr; /* comma sep list of addrs */
60 struct list_head ds_addrs;
61 struct nfs_client *ds_clp;
62 atomic_t ds_count;
63};
64
65/* nfs4_file_layout_dsaddr flags */
66#define NFS4_DEVICE_ID_NEG_ENTRY 0x00000001
67
68struct nfs4_file_layout_dsaddr {
69 struct nfs4_deviceid_node id_node;
70 unsigned long flags;
71 u32 stripe_count;
72 u8 *stripe_indices;
73 u32 ds_num;
74 struct nfs4_pnfs_ds *ds_list[1];
75};
76
77struct nfs4_filelayout_segment {
78 struct pnfs_layout_segment generic_hdr;
79 u32 stripe_type;
80 u32 commit_through_mds;
81 u32 stripe_unit;
82 u32 first_stripe_index;
83 u64 pattern_offset;
84 struct nfs4_file_layout_dsaddr *dsaddr; /* Point to GETDEVINFO data */
85 unsigned int num_fh;
86 struct nfs_fh **fh_array;
87 struct list_head *commit_buckets; /* Sort commits to ds */
88 int number_of_buckets;
89};
90
91static inline struct nfs4_filelayout_segment *
92FILELAYOUT_LSEG(struct pnfs_layout_segment *lseg)
93{
94 return container_of(lseg,
95 struct nfs4_filelayout_segment,
96 generic_hdr);
97}
98
99static inline struct nfs4_deviceid_node *
100FILELAYOUT_DEVID_NODE(struct pnfs_layout_segment *lseg)
101{
102 return &FILELAYOUT_LSEG(lseg)->dsaddr->id_node;
103}
104
105extern struct nfs_fh *
106nfs4_fl_select_ds_fh(struct pnfs_layout_segment *lseg, u32 j);
107
108extern void print_ds(struct nfs4_pnfs_ds *ds);
109u32 nfs4_fl_calc_j_index(struct pnfs_layout_segment *lseg, loff_t offset);
110u32 nfs4_fl_calc_ds_index(struct pnfs_layout_segment *lseg, u32 j);
111struct nfs4_pnfs_ds *nfs4_fl_prepare_ds(struct pnfs_layout_segment *lseg,
112 u32 ds_idx);
113extern void nfs4_fl_put_deviceid(struct nfs4_file_layout_dsaddr *dsaddr);
114extern void nfs4_fl_free_deviceid(struct nfs4_file_layout_dsaddr *dsaddr);
115struct nfs4_file_layout_dsaddr *
116get_device_info(struct inode *inode, struct nfs4_deviceid *dev_id, gfp_t gfp_flags);
117
118#endif /* FS_NFS_NFS4FILELAYOUT_H */