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22#ifndef __ORE_H__
23#define __ORE_H__
24
25#include <scsi/osd_initiator.h>
26#include <scsi/osd_attributes.h>
27#include <scsi/osd_sec.h>
28#include <linux/pnfs_osd_xdr.h>
29#include <linux/bug.h>
30
31struct ore_comp {
32 struct osd_obj_id obj;
33 u8 cred[OSD_CAP_LEN];
34};
35
36struct ore_layout {
37
38 enum pnfs_osd_raid_algorithm4
39 raid_algorithm;
40 unsigned stripe_unit;
41 unsigned mirrors_p1;
42
43 unsigned group_width;
44 unsigned parity;
45 u64 group_depth;
46 unsigned group_count;
47
48
49
50
51 unsigned long max_io_length;
52
53
54};
55
56struct ore_dev {
57 struct osd_dev *od;
58};
59
60struct ore_components {
61 unsigned first_dev;
62 unsigned numdevs;
63
64
65
66 enum EC_COMP_USAGE {
67 EC_SINGLE_COMP = 0, EC_MULTPLE_COMPS = 0xffffffff
68 } single_comp;
69 struct ore_comp *comps;
70
71
72
73
74
75
76 struct ore_dev **ods;
77};
78
79
80static inline struct osd_dev *ore_comp_dev(
81 const struct ore_components *oc, unsigned i)
82{
83 BUG_ON((i < oc->first_dev) || (oc->first_dev + oc->numdevs <= i));
84 return oc->ods[i - oc->first_dev]->od;
85}
86
87static inline void ore_comp_set_dev(
88 struct ore_components *oc, unsigned i, struct osd_dev *od)
89{
90 oc->ods[i - oc->first_dev]->od = od;
91}
92
93struct ore_striping_info {
94 u64 offset;
95 u64 obj_offset;
96 u64 length;
97 u64 first_stripe_start;
98 u64 M;
99 unsigned bytes_in_stripe;
100 unsigned dev;
101 unsigned par_dev;
102 unsigned unit_off;
103 unsigned cur_pg;
104 unsigned cur_comp;
105 unsigned maxdevUnits;
106};
107
108struct ore_io_state;
109typedef void (*ore_io_done_fn)(struct ore_io_state *ios, void *private);
110struct _ore_r4w_op {
111
112 struct page * (*get_page)(void *priv, u64 page_index, bool *uptodate);
113 void (*put_page)(void *priv, struct page *page);
114};
115
116struct ore_io_state {
117 struct kref kref;
118 struct ore_striping_info si;
119
120 void *private;
121 ore_io_done_fn done;
122
123 struct ore_layout *layout;
124 struct ore_components *oc;
125
126
127 loff_t offset;
128 unsigned long length;
129 void *kern_buff;
130
131 struct page **pages;
132 unsigned nr_pages;
133 unsigned pgbase;
134 unsigned pages_consumed;
135
136
137 unsigned in_attr_len;
138 struct osd_attr *in_attr;
139 unsigned out_attr_len;
140 struct osd_attr *out_attr;
141
142 bool reading;
143
144
145 bool extra_part_alloc;
146 struct page **parity_pages;
147 unsigned max_par_pages;
148 unsigned cur_par_page;
149 unsigned sgs_per_dev;
150 struct __stripe_pages_2d *sp2d;
151 struct ore_io_state *ios_read_4_write;
152 const struct _ore_r4w_op *r4w;
153
154
155 unsigned numdevs;
156 struct ore_per_dev_state {
157 struct osd_request *or;
158 struct bio *bio;
159 loff_t offset;
160 unsigned length;
161 unsigned last_sgs_total;
162 unsigned dev;
163 struct osd_sg_entry *sglist;
164 unsigned cur_sg;
165 } per_dev[];
166};
167
168static inline unsigned ore_io_state_size(unsigned numdevs)
169{
170 return sizeof(struct ore_io_state) +
171 sizeof(struct ore_per_dev_state) * numdevs;
172}
173
174
175int ore_verify_layout(unsigned total_comps, struct ore_layout *layout);
176void ore_calc_stripe_info(struct ore_layout *layout, u64 file_offset,
177 u64 length, struct ore_striping_info *si);
178int ore_get_rw_state(struct ore_layout *layout, struct ore_components *comps,
179 bool is_reading, u64 offset, u64 length,
180 struct ore_io_state **ios);
181int ore_get_io_state(struct ore_layout *layout, struct ore_components *comps,
182 struct ore_io_state **ios);
183void ore_put_io_state(struct ore_io_state *ios);
184
185typedef void (*ore_on_dev_error)(struct ore_io_state *ios, struct ore_dev *od,
186 unsigned dev_index, enum osd_err_priority oep,
187 u64 dev_offset, u64 dev_len);
188int ore_check_io(struct ore_io_state *ios, ore_on_dev_error rep);
189
190int ore_create(struct ore_io_state *ios);
191int ore_remove(struct ore_io_state *ios);
192int ore_write(struct ore_io_state *ios);
193int ore_read(struct ore_io_state *ios);
194int ore_truncate(struct ore_layout *layout, struct ore_components *comps,
195 u64 size);
196
197int extract_attr_from_ios(struct ore_io_state *ios, struct osd_attr *attr);
198
199extern const struct osd_attr g_attr_logical_length;
200
201#endif
202