projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
| Commit | Line | Data |
|---|---|---|
| 8ff660ab BH |
1 | /* |
| 2 | * Copyright (C) 2011 | |
| 3 | * Boaz Harrosh <bharrosh@panasas.com> | |
| 4 | * | |
| 5 | * Public Declarations of the ORE API | |
| 6 | * | |
| 7 | * This file is part of the ORE (Object Raid Engine) library. | |
| 8 | * | |
| 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) | |
| 12 | * | |
| 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. | |
| 17 | * | |
| 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 | |
| 21 | */ | |
| 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 | ||
| 30 | struct ore_comp { | |
| 31 | struct osd_obj_id obj; | |
| 32 | u8 cred[OSD_CAP_LEN]; | |
| 33 | }; | |
| 34 | ||
| 35 | struct ore_layout { | |
| 36 | /* Our way of looking at the data_map */ | |
| 37 | unsigned stripe_unit; | |
| 38 | unsigned mirrors_p1; | |
| 39 | ||
| 40 | unsigned group_width; | |
| 41 | u64 group_depth; | |
| 42 | unsigned group_count; | |
| 43 | }; | |
| 44 | ||
| 45 | struct ore_components { | |
| 46 | unsigned numdevs; /* Num of devices in array */ | |
| 47 | /* If @single_comp == EC_SINGLE_COMP, @comps points to a single | |
| 48 | * component. else there are @numdevs components | |
| 49 | */ | |
| 50 | enum EC_COMP_USAGE { | |
| 51 | EC_SINGLE_COMP = 0, EC_MULTPLE_COMPS = 0xffffffff | |
| 52 | } single_comp; | |
| 53 | struct ore_comp *comps; | |
| 54 | struct osd_dev **ods; /* osd_dev array */ | |
| 55 | }; | |
| 56 | ||
| 57 | struct ore_io_state; | |
| 58 | typedef void (*ore_io_done_fn)(struct ore_io_state *ios, void *private); | |
| 59 | ||
| 60 | struct ore_io_state { | |
| 61 | struct kref kref; | |
| 62 | ||
| 63 | void *private; | |
| 64 | ore_io_done_fn done; | |
| 65 | ||
| 66 | struct ore_layout *layout; | |
| 67 | struct ore_components *comps; | |
| 68 | ||
| 69 | /* Global read/write IO*/ | |
| 70 | loff_t offset; | |
| 71 | unsigned long length; | |
| 72 | void *kern_buff; | |
| 73 | ||
| 74 | struct page **pages; | |
| 75 | unsigned nr_pages; | |
| 76 | unsigned pgbase; | |
| 77 | unsigned pages_consumed; | |
| 78 | ||
| 79 | /* Attributes */ | |
| 80 | unsigned in_attr_len; | |
| 81 | struct osd_attr *in_attr; | |
| 82 | unsigned out_attr_len; | |
| 83 | struct osd_attr *out_attr; | |
| 84 | ||
| 85 | bool reading; | |
| 86 | ||
| 87 | /* Variable array of size numdevs */ | |
| 88 | unsigned numdevs; | |
| 89 | struct ore_per_dev_state { | |
| 90 | struct osd_request *or; | |
| 91 | struct bio *bio; | |
| 92 | loff_t offset; | |
| 93 | unsigned length; | |
| 94 | unsigned dev; | |
| 95 | } per_dev[]; | |
| 96 | }; | |
| 97 | ||
| 98 | static inline unsigned ore_io_state_size(unsigned numdevs) | |
| 99 | { | |
| 100 | return sizeof(struct ore_io_state) + | |
| 101 | sizeof(struct ore_per_dev_state) * numdevs; | |
| 102 | } | |
| 103 | ||
| 104 | /* ore.c */ | |
| 105 | int ore_get_rw_state(struct ore_layout *layout, struct ore_components *comps, | |
| 106 | bool is_reading, u64 offset, u64 length, | |
| 107 | struct ore_io_state **ios); | |
| 108 | int ore_get_io_state(struct ore_layout *layout, struct ore_components *comps, | |
| 109 | struct ore_io_state **ios); | |
| 110 | void ore_put_io_state(struct ore_io_state *ios); | |
| 111 | ||
| 112 | int ore_check_io(struct ore_io_state *ios, u64 *resid); | |
| 113 | ||
| 114 | int ore_create(struct ore_io_state *ios); | |
| 115 | int ore_remove(struct ore_io_state *ios); | |
| 116 | int ore_write(struct ore_io_state *ios); | |
| 117 | int ore_read(struct ore_io_state *ios); | |
| 118 | int ore_truncate(struct ore_layout *layout, struct ore_components *comps, | |
| 119 | u64 size); | |
| 120 | ||
| 121 | int extract_attr_from_ios(struct ore_io_state *ios, struct osd_attr *attr); | |
| 122 | ||
| 123 | extern const struct osd_attr g_attr_logical_length; | |
| 124 | ||
| 125 | #endif |