Root/
1 | /* |
2 | * Copyright (C) 2007 Oracle. All rights reserved. |
3 | * |
4 | * This program is free software; you can redistribute it and/or |
5 | * modify it under the terms of the GNU General Public |
6 | * License v2 as published by the Free Software Foundation. |
7 | * |
8 | * This program is distributed in the hope that it will be useful, |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
11 | * General Public License for more details. |
12 | * |
13 | * You should have received a copy of the GNU General Public |
14 | * License along with this program; if not, write to the |
15 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
16 | * Boston, MA 021110-1307, USA. |
17 | */ |
18 | |
19 | #ifndef __BTRFS_VOLUMES_ |
20 | #define __BTRFS_VOLUMES_ |
21 | |
22 | #include <linux/bio.h> |
23 | #include "async-thread.h" |
24 | |
25 | struct buffer_head; |
26 | struct btrfs_pending_bios { |
27 | struct bio *head; |
28 | struct bio *tail; |
29 | }; |
30 | |
31 | struct btrfs_device { |
32 | struct list_head dev_list; |
33 | struct list_head dev_alloc_list; |
34 | struct btrfs_fs_devices *fs_devices; |
35 | struct btrfs_root *dev_root; |
36 | |
37 | /* regular prio bios */ |
38 | struct btrfs_pending_bios pending_bios; |
39 | /* WRITE_SYNC bios */ |
40 | struct btrfs_pending_bios pending_sync_bios; |
41 | |
42 | int running_pending; |
43 | u64 generation; |
44 | |
45 | int barriers; |
46 | int writeable; |
47 | int in_fs_metadata; |
48 | |
49 | spinlock_t io_lock; |
50 | |
51 | struct block_device *bdev; |
52 | |
53 | /* the mode sent to open_bdev_exclusive */ |
54 | fmode_t mode; |
55 | |
56 | char *name; |
57 | |
58 | /* the internal btrfs device id */ |
59 | u64 devid; |
60 | |
61 | /* size of the device */ |
62 | u64 total_bytes; |
63 | |
64 | /* size of the disk */ |
65 | u64 disk_total_bytes; |
66 | |
67 | /* bytes used */ |
68 | u64 bytes_used; |
69 | |
70 | /* optimal io alignment for this device */ |
71 | u32 io_align; |
72 | |
73 | /* optimal io width for this device */ |
74 | u32 io_width; |
75 | |
76 | /* minimal io size for this device */ |
77 | u32 sector_size; |
78 | |
79 | /* type and info about this device */ |
80 | u64 type; |
81 | |
82 | /* physical drive uuid (or lvm uuid) */ |
83 | u8 uuid[BTRFS_UUID_SIZE]; |
84 | |
85 | struct btrfs_work work; |
86 | }; |
87 | |
88 | struct btrfs_fs_devices { |
89 | u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ |
90 | |
91 | /* the device with this id has the most recent copy of the super */ |
92 | u64 latest_devid; |
93 | u64 latest_trans; |
94 | u64 num_devices; |
95 | u64 open_devices; |
96 | u64 rw_devices; |
97 | u64 total_rw_bytes; |
98 | struct block_device *latest_bdev; |
99 | |
100 | /* all of the devices in the FS, protected by a mutex |
101 | * so we can safely walk it to write out the supers without |
102 | * worrying about add/remove by the multi-device code |
103 | */ |
104 | struct mutex device_list_mutex; |
105 | struct list_head devices; |
106 | |
107 | /* devices not currently being allocated */ |
108 | struct list_head alloc_list; |
109 | struct list_head list; |
110 | |
111 | struct btrfs_fs_devices *seed; |
112 | int seeding; |
113 | |
114 | int opened; |
115 | |
116 | /* set when we find or add a device that doesn't have the |
117 | * nonrot flag set |
118 | */ |
119 | int rotating; |
120 | }; |
121 | |
122 | struct btrfs_bio_stripe { |
123 | struct btrfs_device *dev; |
124 | u64 physical; |
125 | }; |
126 | |
127 | struct btrfs_multi_bio { |
128 | atomic_t stripes_pending; |
129 | bio_end_io_t *end_io; |
130 | struct bio *orig_bio; |
131 | void *private; |
132 | atomic_t error; |
133 | int max_errors; |
134 | int num_stripes; |
135 | struct btrfs_bio_stripe stripes[]; |
136 | }; |
137 | |
138 | #define btrfs_multi_bio_size(n) (sizeof(struct btrfs_multi_bio) + \ |
139 | (sizeof(struct btrfs_bio_stripe) * (n))) |
140 | |
141 | int btrfs_alloc_dev_extent(struct btrfs_trans_handle *trans, |
142 | struct btrfs_device *device, |
143 | u64 chunk_tree, u64 chunk_objectid, |
144 | u64 chunk_offset, u64 start, u64 num_bytes); |
145 | int btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw, |
146 | u64 logical, u64 *length, |
147 | struct btrfs_multi_bio **multi_ret, int mirror_num); |
148 | int btrfs_rmap_block(struct btrfs_mapping_tree *map_tree, |
149 | u64 chunk_start, u64 physical, u64 devid, |
150 | u64 **logical, int *naddrs, int *stripe_len); |
151 | int btrfs_read_sys_array(struct btrfs_root *root); |
152 | int btrfs_read_chunk_tree(struct btrfs_root *root); |
153 | int btrfs_alloc_chunk(struct btrfs_trans_handle *trans, |
154 | struct btrfs_root *extent_root, u64 type); |
155 | void btrfs_mapping_init(struct btrfs_mapping_tree *tree); |
156 | void btrfs_mapping_tree_free(struct btrfs_mapping_tree *tree); |
157 | int btrfs_map_bio(struct btrfs_root *root, int rw, struct bio *bio, |
158 | int mirror_num, int async_submit); |
159 | int btrfs_read_super_device(struct btrfs_root *root, struct extent_buffer *buf); |
160 | int btrfs_open_devices(struct btrfs_fs_devices *fs_devices, |
161 | fmode_t flags, void *holder); |
162 | int btrfs_scan_one_device(const char *path, fmode_t flags, void *holder, |
163 | struct btrfs_fs_devices **fs_devices_ret); |
164 | int btrfs_close_devices(struct btrfs_fs_devices *fs_devices); |
165 | int btrfs_close_extra_devices(struct btrfs_fs_devices *fs_devices); |
166 | int btrfs_add_device(struct btrfs_trans_handle *trans, |
167 | struct btrfs_root *root, |
168 | struct btrfs_device *device); |
169 | int btrfs_rm_device(struct btrfs_root *root, char *device_path); |
170 | int btrfs_cleanup_fs_uuids(void); |
171 | int btrfs_num_copies(struct btrfs_mapping_tree *map_tree, u64 logical, u64 len); |
172 | int btrfs_unplug_page(struct btrfs_mapping_tree *map_tree, |
173 | u64 logical, struct page *page); |
174 | int btrfs_grow_device(struct btrfs_trans_handle *trans, |
175 | struct btrfs_device *device, u64 new_size); |
176 | struct btrfs_device *btrfs_find_device(struct btrfs_root *root, u64 devid, |
177 | u8 *uuid, u8 *fsid); |
178 | int btrfs_shrink_device(struct btrfs_device *device, u64 new_size); |
179 | int btrfs_init_new_device(struct btrfs_root *root, char *path); |
180 | int btrfs_balance(struct btrfs_root *dev_root); |
181 | void btrfs_unlock_volumes(void); |
182 | void btrfs_lock_volumes(void); |
183 | int btrfs_chunk_readonly(struct btrfs_root *root, u64 chunk_offset); |
184 | int find_free_dev_extent(struct btrfs_trans_handle *trans, |
185 | struct btrfs_device *device, u64 num_bytes, |
186 | u64 *start, u64 *max_avail); |
187 | #endif |
188 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9