mirror of https://gitee.com/openkylin/linux.git
126 lines
3.2 KiB
C
126 lines
3.2 KiB
C
/*
|
|
* Copyright (C) 2011
|
|
* Boaz Harrosh <bharrosh@panasas.com>
|
|
*
|
|
* Public Declarations of the ORE API
|
|
*
|
|
* This file is part of the ORE (Object Raid Engine) library.
|
|
*
|
|
* ORE is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as published
|
|
* by the Free Software Foundation. (GPL v2)
|
|
*
|
|
* ORE is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with the ORE; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
#ifndef __ORE_H__
|
|
#define __ORE_H__
|
|
|
|
#include <scsi/osd_initiator.h>
|
|
#include <scsi/osd_attributes.h>
|
|
#include <scsi/osd_sec.h>
|
|
#include <linux/pnfs_osd_xdr.h>
|
|
|
|
struct ore_comp {
|
|
struct osd_obj_id obj;
|
|
u8 cred[OSD_CAP_LEN];
|
|
};
|
|
|
|
struct ore_layout {
|
|
/* Our way of looking at the data_map */
|
|
unsigned stripe_unit;
|
|
unsigned mirrors_p1;
|
|
|
|
unsigned group_width;
|
|
u64 group_depth;
|
|
unsigned group_count;
|
|
};
|
|
|
|
struct ore_components {
|
|
unsigned numdevs; /* Num of devices in array */
|
|
/* If @single_comp == EC_SINGLE_COMP, @comps points to a single
|
|
* component. else there are @numdevs components
|
|
*/
|
|
enum EC_COMP_USAGE {
|
|
EC_SINGLE_COMP = 0, EC_MULTPLE_COMPS = 0xffffffff
|
|
} single_comp;
|
|
struct ore_comp *comps;
|
|
struct osd_dev **ods; /* osd_dev array */
|
|
};
|
|
|
|
struct ore_io_state;
|
|
typedef void (*ore_io_done_fn)(struct ore_io_state *ios, void *private);
|
|
|
|
struct ore_io_state {
|
|
struct kref kref;
|
|
|
|
void *private;
|
|
ore_io_done_fn done;
|
|
|
|
struct ore_layout *layout;
|
|
struct ore_components *comps;
|
|
|
|
/* Global read/write IO*/
|
|
loff_t offset;
|
|
unsigned long length;
|
|
void *kern_buff;
|
|
|
|
struct page **pages;
|
|
unsigned nr_pages;
|
|
unsigned pgbase;
|
|
unsigned pages_consumed;
|
|
|
|
/* Attributes */
|
|
unsigned in_attr_len;
|
|
struct osd_attr *in_attr;
|
|
unsigned out_attr_len;
|
|
struct osd_attr *out_attr;
|
|
|
|
bool reading;
|
|
|
|
/* Variable array of size numdevs */
|
|
unsigned numdevs;
|
|
struct ore_per_dev_state {
|
|
struct osd_request *or;
|
|
struct bio *bio;
|
|
loff_t offset;
|
|
unsigned length;
|
|
unsigned dev;
|
|
} per_dev[];
|
|
};
|
|
|
|
static inline unsigned ore_io_state_size(unsigned numdevs)
|
|
{
|
|
return sizeof(struct ore_io_state) +
|
|
sizeof(struct ore_per_dev_state) * numdevs;
|
|
}
|
|
|
|
/* ore.c */
|
|
int ore_get_rw_state(struct ore_layout *layout, struct ore_components *comps,
|
|
bool is_reading, u64 offset, u64 length,
|
|
struct ore_io_state **ios);
|
|
int ore_get_io_state(struct ore_layout *layout, struct ore_components *comps,
|
|
struct ore_io_state **ios);
|
|
void ore_put_io_state(struct ore_io_state *ios);
|
|
|
|
int ore_check_io(struct ore_io_state *ios, u64 *resid);
|
|
|
|
int ore_create(struct ore_io_state *ios);
|
|
int ore_remove(struct ore_io_state *ios);
|
|
int ore_write(struct ore_io_state *ios);
|
|
int ore_read(struct ore_io_state *ios);
|
|
int ore_truncate(struct ore_layout *layout, struct ore_components *comps,
|
|
u64 size);
|
|
|
|
int extract_attr_from_ios(struct ore_io_state *ios, struct osd_attr *attr);
|
|
|
|
extern const struct osd_attr g_attr_logical_length;
|
|
|
|
#endif
|