3 * Boaz Harrosh <bharrosh@panasas.com>
5 * Public Declarations of the ORE API
7 * This file is part of the ORE (Object Raid Engine) library.
9 * ORE is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as published
11 * by the Free Software Foundation. (GPL v2)
13 * ORE is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with the ORE; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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>
31 struct osd_obj_id obj;
36 /* Our way of looking at the data_map */
37 enum pnfs_osd_raid_algorithm4
47 struct ore_components {
48 unsigned numdevs; /* Num of devices in array */
49 /* If @single_comp == EC_SINGLE_COMP, @comps points to a single
50 * component. else there are @numdevs components
53 EC_SINGLE_COMP = 0, EC_MULTPLE_COMPS = 0xffffffff
55 struct ore_comp *comps;
56 struct osd_dev **ods; /* osd_dev array */
59 struct ore_striping_info {
62 u64 M; /* for truncate */
68 typedef void (*ore_io_done_fn)(struct ore_io_state *ios, void *private);
76 struct ore_layout *layout;
77 struct ore_components *oc;
79 /* Global read/write IO*/
87 unsigned pages_consumed;
91 struct osd_attr *in_attr;
92 unsigned out_attr_len;
93 struct osd_attr *out_attr;
97 /* Variable array of size numdevs */
99 struct ore_per_dev_state {
100 struct osd_request *or;
108 static inline unsigned ore_io_state_size(unsigned numdevs)
110 return sizeof(struct ore_io_state) +
111 sizeof(struct ore_per_dev_state) * numdevs;
115 int ore_get_rw_state(struct ore_layout *layout, struct ore_components *comps,
116 bool is_reading, u64 offset, u64 length,
117 struct ore_io_state **ios);
118 int ore_get_io_state(struct ore_layout *layout, struct ore_components *comps,
119 struct ore_io_state **ios);
120 void ore_put_io_state(struct ore_io_state *ios);
122 int ore_check_io(struct ore_io_state *ios, u64 *resid);
124 int ore_create(struct ore_io_state *ios);
125 int ore_remove(struct ore_io_state *ios);
126 int ore_write(struct ore_io_state *ios);
127 int ore_read(struct ore_io_state *ios);
128 int ore_truncate(struct ore_layout *layout, struct ore_components *comps,
131 int extract_attr_from_ios(struct ore_io_state *ios, struct osd_attr *attr);
133 extern const struct osd_attr g_attr_logical_length;