diff options
Diffstat (limited to 'include/scsi/osd_ore.h')
| -rw-r--r-- | include/scsi/osd_ore.h | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/include/scsi/osd_ore.h b/include/scsi/osd_ore.h new file mode 100644 index 00000000000..c5c5e008e6d --- /dev/null +++ b/include/scsi/osd_ore.h @@ -0,0 +1,125 @@ +/* + * 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 |