aboutsummaryrefslogtreecommitdiffstats
path: root/fs/btrfs/volumes.h
diff options
context:
space:
mode:
Diffstat (limited to 'fs/btrfs/volumes.h')
-rw-r--r--fs/btrfs/volumes.h150
1 files changed, 150 insertions, 0 deletions
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
new file mode 100644
index 000000000000..c50e50580b51
--- /dev/null
+++ b/fs/btrfs/volumes.h
@@ -0,0 +1,150 @@
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
25struct buffer_head;
26struct btrfs_device {
27 struct list_head dev_list;
28 struct list_head dev_alloc_list;
29 struct btrfs_root *dev_root;
30 struct buffer_head *pending_io;
31 struct bio *pending_bios;
32 struct bio *pending_bio_tail;
33 int running_pending;
34 u64 generation;
35
36 int barriers;
37 int in_fs_metadata;
38
39 spinlock_t io_lock;
40
41 struct block_device *bdev;
42
43 char *name;
44
45 /* the internal btrfs device id */
46 u64 devid;
47
48 /* size of the device */
49 u64 total_bytes;
50
51 /* bytes used */
52 u64 bytes_used;
53
54 /* optimal io alignment for this device */
55 u32 io_align;
56
57 /* optimal io width for this device */
58 u32 io_width;
59
60 /* minimal io size for this device */
61 u32 sector_size;
62
63 /* type and info about this device */
64 u64 type;
65
66 /* physical drive uuid (or lvm uuid) */
67 u8 uuid[BTRFS_UUID_SIZE];
68
69 struct btrfs_work work;
70};
71
72struct btrfs_fs_devices {
73 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
74
75 /* the device with this id has the most recent coyp of the super */
76 u64 latest_devid;
77 u64 latest_trans;
78 u64 num_devices;
79 u64 open_devices;
80 struct block_device *latest_bdev;
81 /* all of the devices in the FS */
82 struct list_head devices;
83
84 /* devices not currently being allocated */
85 struct list_head alloc_list;
86 struct list_head list;
87 int mounted;
88};
89
90struct btrfs_bio_stripe {
91 struct btrfs_device *dev;
92 u64 physical;
93};
94
95struct btrfs_multi_bio {
96 atomic_t stripes_pending;
97 bio_end_io_t *end_io;
98 struct bio *orig_bio;
99 void *private;
100 atomic_t error;
101 int max_errors;
102 int num_stripes;
103 struct btrfs_bio_stripe stripes[];
104};
105
106#define btrfs_multi_bio_size(n) (sizeof(struct btrfs_multi_bio) + \
107 (sizeof(struct btrfs_bio_stripe) * (n)))
108
109int btrfs_alloc_dev_extent(struct btrfs_trans_handle *trans,
110 struct btrfs_device *device,
111 u64 chunk_tree, u64 chunk_objectid,
112 u64 chunk_offset,
113 u64 num_bytes, u64 *start);
114int btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw,
115 u64 logical, u64 *length,
116 struct btrfs_multi_bio **multi_ret, int mirror_num);
117int btrfs_read_sys_array(struct btrfs_root *root);
118int btrfs_read_chunk_tree(struct btrfs_root *root);
119int btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
120 struct btrfs_root *extent_root, u64 *start,
121 u64 *num_bytes, u64 type);
122void btrfs_mapping_init(struct btrfs_mapping_tree *tree);
123void btrfs_mapping_tree_free(struct btrfs_mapping_tree *tree);
124int btrfs_map_bio(struct btrfs_root *root, int rw, struct bio *bio,
125 int mirror_num, int async_submit);
126int btrfs_read_super_device(struct btrfs_root *root, struct extent_buffer *buf);
127int btrfs_open_devices(struct btrfs_fs_devices *fs_devices,
128 int flags, void *holder);
129int btrfs_scan_one_device(const char *path, int flags, void *holder,
130 struct btrfs_fs_devices **fs_devices_ret);
131int btrfs_close_devices(struct btrfs_fs_devices *fs_devices);
132int btrfs_close_extra_devices(struct btrfs_fs_devices *fs_devices);
133int btrfs_add_device(struct btrfs_trans_handle *trans,
134 struct btrfs_root *root,
135 struct btrfs_device *device);
136int btrfs_rm_device(struct btrfs_root *root, char *device_path);
137int btrfs_cleanup_fs_uuids(void);
138int btrfs_num_copies(struct btrfs_mapping_tree *map_tree, u64 logical, u64 len);
139int btrfs_unplug_page(struct btrfs_mapping_tree *map_tree,
140 u64 logical, struct page *page);
141int btrfs_grow_device(struct btrfs_trans_handle *trans,
142 struct btrfs_device *device, u64 new_size);
143struct btrfs_device *btrfs_find_device(struct btrfs_root *root, u64 devid,
144 u8 *uuid);
145int btrfs_shrink_device(struct btrfs_device *device, u64 new_size);
146int btrfs_init_new_device(struct btrfs_root *root, char *path);
147int btrfs_balance(struct btrfs_root *dev_root);
148void btrfs_unlock_volumes(void);
149void btrfs_lock_volumes(void);
150#endif
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-01 08:24:29 -0500