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btrfs: move basic block_group definitions to their own header 

This is prep work for moving all of the block group cache code into its
own file.

Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ minor comment updates ]
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Josef Bacik 2019-06-20 15:37:44 -04:00 committed by David Sterba
parent 478b4d9f01
commit aac0023c21
21 changed files with 175 additions and 148 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

154
fs/btrfs/block-group.h Normal file
View File

@ -0,0 +1,154 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef BTRFS_BLOCK_GROUP_H
#define BTRFS_BLOCK_GROUP_H
enum btrfs_disk_cache_state {
BTRFS_DC_WRITTEN,
BTRFS_DC_ERROR,
BTRFS_DC_CLEAR,
BTRFS_DC_SETUP,
};
struct btrfs_caching_control {
struct list_head list;
struct mutex mutex;
wait_queue_head_t wait;
struct btrfs_work work;
struct btrfs_block_group_cache *block_group;
u64 progress;
refcount_t count;
};
/* Once caching_thread() finds this much free space, it will wake up waiters. */
#define CACHING_CTL_WAKE_UP SZ_2M
struct btrfs_block_group_cache {
struct btrfs_key key;
struct btrfs_block_group_item item;
struct btrfs_fs_info *fs_info;
struct inode *inode;
spinlock_t lock;
u64 pinned;
u64 reserved;
u64 delalloc_bytes;
u64 bytes_super;
u64 flags;
u64 cache_generation;
/*
* If the free space extent count exceeds this number, convert the block
* group to bitmaps.
*/
u32 bitmap_high_thresh;
/*
* If the free space extent count drops below this number, convert the
* block group back to extents.
*/
u32 bitmap_low_thresh;
/*
* It is just used for the delayed data space allocation because
* only the data space allocation and the relative metadata update
* can be done cross the transaction.
*/
struct rw_semaphore data_rwsem;
/* For raid56, this is a full stripe, without parity */
unsigned long full_stripe_len;
unsigned int ro;
unsigned int iref:1;
unsigned int has_caching_ctl:1;
unsigned int removed:1;
int disk_cache_state;
/* Cache tracking stuff */
int cached;
struct btrfs_caching_control *caching_ctl;
u64 last_byte_to_unpin;
struct btrfs_space_info *space_info;
/* Free space cache stuff */
struct btrfs_free_space_ctl *free_space_ctl;
/* Block group cache stuff */
struct rb_node cache_node;
/* For block groups in the same raid type */
struct list_head list;
/* Usage count */
atomic_t count;
/*
* List of struct btrfs_free_clusters for this block group.
* Today it will only have one thing on it, but that may change
*/
struct list_head cluster_list;
/* For delayed block group creation or deletion of empty block groups */
struct list_head bg_list;
/* For read-only block groups */
struct list_head ro_list;
atomic_t trimming;
/* For dirty block groups */
struct list_head dirty_list;
struct list_head io_list;
struct btrfs_io_ctl io_ctl;
/*
* Incremented when doing extent allocations and holding a read lock
* on the space_info's groups_sem semaphore.
* Decremented when an ordered extent that represents an IO against this
* block group's range is created (after it's added to its inode's
* root's list of ordered extents) or immediately after the allocation
* if it's a metadata extent or fallocate extent (for these cases we
* don't create ordered extents).
*/
atomic_t reservations;
/*
* Incremented while holding the spinlock *lock* by a task checking if
* it can perform a nocow write (incremented if the value for the *ro*
* field is 0). Decremented by such tasks once they create an ordered
* extent or before that if some error happens before reaching that step.
* This is to prevent races between block group relocation and nocow
* writes through direct IO.
*/
atomic_t nocow_writers;
/* Lock for free space tree operations. */
struct mutex free_space_lock;
/*
* Does the block group need to be added to the free space tree?
* Protected by free_space_lock.
*/
int needs_free_space;
/* Record locked full stripes for RAID5/6 block group */
struct btrfs_full_stripe_locks_tree full_stripe_locks_root;
};
#ifdef CONFIG_BTRFS_DEBUG
static inline int btrfs_should_fragment_free_space(
struct btrfs_block_group_cache *block_group)
{
struct btrfs_fs_info *fs_info = block_group->fs_info;
return (btrfs_test_opt(fs_info, FRAGMENT_METADATA) &&
block_group->flags & BTRFS_BLOCK_GROUP_METADATA) ||
(btrfs_test_opt(fs_info, FRAGMENT_DATA) &&
block_group->flags & BTRFS_BLOCK_GROUP_DATA);
}
#endif
#endif /* BTRFS_BLOCK_GROUP_H */

148
fs/btrfs/ctree.h
View File

@ -39,6 +39,7 @@ struct btrfs_transaction;
struct btrfs_pending_snapshot;
struct btrfs_delayed_ref_root;
struct btrfs_space_info;
struct btrfs_block_group_cache;
extern struct kmem_cache *btrfs_trans_handle_cachep;
extern struct kmem_cache *btrfs_bit_radix_cachep;
extern struct kmem_cache *btrfs_path_cachep;
@ -439,26 +440,6 @@ enum btrfs_caching_type {
BTRFS_CACHE_ERROR,
};
enum btrfs_disk_cache_state {
BTRFS_DC_WRITTEN,
BTRFS_DC_ERROR,
BTRFS_DC_CLEAR,
BTRFS_DC_SETUP,
};
struct btrfs_caching_control {
struct list_head list;
struct mutex mutex;
wait_queue_head_t wait;
struct btrfs_work work;
struct btrfs_block_group_cache *block_group;
u64 progress;
refcount_t count;
};
/* Once caching_thread() finds this much free space, it will wake up waiters. */
#define CACHING_CTL_WAKE_UP SZ_2M
struct btrfs_io_ctl {
void *cur, *orig;
struct page *page;
@ -481,120 +462,6 @@ struct btrfs_full_stripe_locks_tree {
struct mutex lock;
};
struct btrfs_block_group_cache {
struct btrfs_key key;
struct btrfs_block_group_item item;
struct btrfs_fs_info *fs_info;
struct inode *inode;
spinlock_t lock;
u64 pinned;
u64 reserved;
u64 delalloc_bytes;
u64 bytes_super;
u64 flags;
u64 cache_generation;
/*
* If the free space extent count exceeds this number, convert the block
* group to bitmaps.
*/
u32 bitmap_high_thresh;
/*
* If the free space extent count drops below this number, convert the
* block group back to extents.
*/
u32 bitmap_low_thresh;
/*
* It is just used for the delayed data space allocation because
* only the data space allocation and the relative metadata update
* can be done cross the transaction.
*/
struct rw_semaphore data_rwsem;
/* for raid56, this is a full stripe, without parity */
unsigned long full_stripe_len;
unsigned int ro;
unsigned int iref:1;
unsigned int has_caching_ctl:1;
unsigned int removed:1;
int disk_cache_state;
/* cache tracking stuff */
int cached;
struct btrfs_caching_control *caching_ctl;
u64 last_byte_to_unpin;
struct btrfs_space_info *space_info;
/* free space cache stuff */
struct btrfs_free_space_ctl *free_space_ctl;
/* block group cache stuff */
struct rb_node cache_node;
/* for block groups in the same raid type */
struct list_head list;
/* usage count */
atomic_t count;
/* List of struct btrfs_free_clusters for this block group.
* Today it will only have one thing on it, but that may change
*/
struct list_head cluster_list;
/* For delayed block group creation or deletion of empty block groups */
struct list_head bg_list;
/* For read-only block groups */
struct list_head ro_list;
atomic_t trimming;
/* For dirty block groups */
struct list_head dirty_list;
struct list_head io_list;
struct btrfs_io_ctl io_ctl;
/*
* Incremented when doing extent allocations and holding a read lock
* on the space_info's groups_sem semaphore.
* Decremented when an ordered extent that represents an IO against this
* block group's range is created (after it's added to its inode's
* root's list of ordered extents) or immediately after the allocation
* if it's a metadata extent or fallocate extent (for these cases we
* don't create ordered extents).
*/
atomic_t reservations;
/*
* Incremented while holding the spinlock *lock* by a task checking if
* it can perform a nocow write (incremented if the value for the *ro*
* field is 0). Decremented by such tasks once they create an ordered
* extent or before that if some error happens before reaching that step.
* This is to prevent races between block group relocation and nocow
* writes through direct IO.
*/
atomic_t nocow_writers;
/* Lock for free space tree operations. */
struct mutex free_space_lock;
/*
* Does the block group need to be added to the free space tree?
* Protected by free_space_lock.
*/
int needs_free_space;
/* Record locked full stripes for RAID5/6 block group */
struct btrfs_full_stripe_locks_tree full_stripe_locks_root;
};
/* delayed seq elem */
struct seq_list {
struct list_head list;
@ -1387,19 +1254,6 @@ static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info)
btrfs_clear_opt(fs_info->mount_opt, opt); \
}
#ifdef CONFIG_BTRFS_DEBUG
static inline int
btrfs_should_fragment_free_space(struct btrfs_block_group_cache *block_group)
{
struct btrfs_fs_info *fs_info = block_group->fs_info;
return (btrfs_test_opt(fs_info, FRAGMENT_METADATA) &&
block_group->flags & BTRFS_BLOCK_GROUP_METADATA) ||
(btrfs_test_opt(fs_info, FRAGMENT_DATA) &&
block_group->flags & BTRFS_BLOCK_GROUP_DATA);
}
#endif
/*
* Requests for changes that need to be done during transaction commit.
*

1
fs/btrfs/disk-io.c
View File

@ -40,6 +40,7 @@
#include "compression.h"
#include "tree-checker.h"
#include "ref-verify.h"
#include "block-group.h"
#define BTRFS_SUPER_FLAG_SUPP (BTRFS_HEADER_FLAG_WRITTEN |\
BTRFS_HEADER_FLAG_RELOC |\

1
fs/btrfs/extent-tree.c
View File

@ -32,6 +32,7 @@
#include "space-info.h"
#include "block-rsv.h"
#include "delalloc-space.h"
#include "block-group.h"
#undef SCRAMBLE_DELAYED_REFS

1
fs/btrfs/free-space-cache.c
View File

@ -20,6 +20,7 @@
#include "volumes.h"
#include "space-info.h"
#include "delalloc-space.h"
#include "block-group.h"
#define BITS_PER_BITMAP (PAGE_SIZE * 8UL)
#define MAX_CACHE_BYTES_PER_GIG SZ_32K

1
fs/btrfs/free-space-tree.c
View File

@ -10,6 +10,7 @@
#include "locking.h"
#include "free-space-tree.h"
#include "transaction.h"
#include "block-group.h"
static int __add_block_group_free_space(struct btrfs_trans_handle *trans,
struct btrfs_block_group_cache *block_group,

2
fs/btrfs/free-space-tree.h
View File

@ -6,6 +6,8 @@
#ifndef BTRFS_FREE_SPACE_TREE_H
#define BTRFS_FREE_SPACE_TREE_H
struct btrfs_caching_control;
/*
* The default size for new free space bitmap items. The last bitmap in a block
* group may be truncated, and none of the free space tree code assumes that

1
fs/btrfs/inode.c
View File

@ -47,6 +47,7 @@
#include "props.h"
#include "qgroup.h"
#include "delalloc-space.h"
#include "block-group.h"
struct btrfs_iget_args {
struct btrfs_key *location;

1
fs/btrfs/ioctl.c
View File

@ -45,6 +45,7 @@
#include "compression.h"
#include "space-info.h"
#include "delalloc-space.h"
#include "block-group.h"
#ifdef CONFIG_64BIT
/* If we have a 32-bit userspace and 64-bit kernel, then the UAPI

2
fs/btrfs/qgroup.c
View File

@ -21,7 +21,7 @@
#include "backref.h"
#include "extent_io.h"
#include "qgroup.h"
#include "block-group.h"
/* TODO XXX FIXME
* - subvol delete -> delete when ref goes to 0? delete limits also?

1
fs/btrfs/reada.c
View File

@ -14,6 +14,7 @@
#include "disk-io.h"
#include "transaction.h"
#include "dev-replace.h"
#include "block-group.h"
#undef DEBUG

1
fs/btrfs/relocation.c
View File

@ -21,6 +21,7 @@
#include "qgroup.h"
#include "print-tree.h"
#include "delalloc-space.h"
#include "block-group.h"
/*
* backref_node, mapping_node and tree_block start with this

1
fs/btrfs/scrub.c
View File

@ -18,6 +18,7 @@
#include "check-integrity.h"
#include "rcu-string.h"
#include "raid56.h"
#include "block-group.h"
/*
* This is only the first step towards a full-features scrub. It reads all

1
fs/btrfs/space-info.c
View File

@ -8,6 +8,7 @@
#include "ordered-data.h"
#include "transaction.h"
#include "math.h"
#include "block-group.h"
u64 btrfs_space_info_used(struct btrfs_space_info *s_info,
bool may_use_included)

1
fs/btrfs/super.c
View File

@ -44,6 +44,7 @@
#include "backref.h"
#include "space-info.h"
#include "tests/btrfs-tests.h"
#include "block-group.h"
#include "qgroup.h"
#define CREATE_TRACE_POINTS

1
fs/btrfs/sysfs.c
View File

@ -17,6 +17,7 @@
#include "sysfs.h"
#include "volumes.h"
#include "space-info.h"
#include "block-group.h"
static inline struct btrfs_fs_info *to_fs_info(struct kobject *kobj);
static inline struct btrfs_fs_devices *to_fs_devs(struct kobject *kobj);

1
fs/btrfs/tests/btrfs-tests.c
View File

@ -15,6 +15,7 @@
#include "../volumes.h"
#include "../disk-io.h"
#include "../qgroup.h"
#include "../block-group.h"
static struct vfsmount *test_mnt = NULL;

1
fs/btrfs/tests/free-space-tests.c
View File

@ -8,6 +8,7 @@
#include "../ctree.h"
#include "../disk-io.h"
#include "../free-space-cache.h"
#include "../block-group.h"
#define BITS_PER_BITMAP (PAGE_SIZE * 8UL)

1
fs/btrfs/tests/free-space-tree-tests.c
View File

@ -9,6 +9,7 @@
#include "../disk-io.h"
#include "../free-space-tree.h"
#include "../transaction.h"
#include "../block-group.h"
struct free_space_extent {
u64 start;

1
fs/btrfs/transaction.c
View File

@ -19,6 +19,7 @@
#include "volumes.h"
#include "dev-replace.h"
#include "qgroup.h"
#include "block-group.h"
#define BTRFS_ROOT_TRANS_TAG 0

1
fs/btrfs/volumes.c
View File

@ -29,6 +29,7 @@
#include "sysfs.h"
#include "tree-checker.h"
#include "space-info.h"
#include "block-group.h"
const struct btrfs_raid_attr btrfs_raid_array[BTRFS_NR_RAID_TYPES] = {
[BTRFS_RAID_RAID10] = {