mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 19:29:37 +00:00
![Nikolay Borisov](/assets/img/avatar_default.png)
This commit flips the switch to start tracking/processing pinned extents on a per-transaction basis. It mostly replaces all references from btrfs_fs_info::(pinned_extents|freed_extents[]) to btrfs_transaction::pinned_extents. Two notable modifications that warrant explicit mention are changing clean_pinned_extents to get a reference to the previously running transaction. The other one is removal of call to btrfs_destroy_pinned_extent since transactions are going to be cleaned in btrfs_cleanup_one_transaction. Reviewed-by: Josef Bacik <josef@toxicpanda.com> Signed-off-by: Nikolay Borisov <nborisov@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
242 lines
7.8 KiB
C
242 lines
7.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Copyright (C) 2007 Oracle. All rights reserved.
|
|
*/
|
|
|
|
#ifndef BTRFS_TRANSACTION_H
|
|
#define BTRFS_TRANSACTION_H
|
|
|
|
#include <linux/refcount.h>
|
|
#include "btrfs_inode.h"
|
|
#include "delayed-ref.h"
|
|
#include "ctree.h"
|
|
|
|
enum btrfs_trans_state {
|
|
TRANS_STATE_RUNNING,
|
|
TRANS_STATE_COMMIT_START,
|
|
TRANS_STATE_COMMIT_DOING,
|
|
TRANS_STATE_UNBLOCKED,
|
|
TRANS_STATE_COMPLETED,
|
|
TRANS_STATE_MAX,
|
|
};
|
|
|
|
#define BTRFS_TRANS_HAVE_FREE_BGS 0
|
|
#define BTRFS_TRANS_DIRTY_BG_RUN 1
|
|
#define BTRFS_TRANS_CACHE_ENOSPC 2
|
|
|
|
struct btrfs_transaction {
|
|
u64 transid;
|
|
/*
|
|
* total external writers(USERSPACE/START/ATTACH) in this
|
|
* transaction, it must be zero before the transaction is
|
|
* being committed
|
|
*/
|
|
atomic_t num_extwriters;
|
|
/*
|
|
* total writers in this transaction, it must be zero before the
|
|
* transaction can end
|
|
*/
|
|
atomic_t num_writers;
|
|
refcount_t use_count;
|
|
|
|
unsigned long flags;
|
|
|
|
/* Be protected by fs_info->trans_lock when we want to change it. */
|
|
enum btrfs_trans_state state;
|
|
int aborted;
|
|
struct list_head list;
|
|
struct extent_io_tree dirty_pages;
|
|
time64_t start_time;
|
|
wait_queue_head_t writer_wait;
|
|
wait_queue_head_t commit_wait;
|
|
struct list_head pending_snapshots;
|
|
struct list_head dev_update_list;
|
|
struct list_head switch_commits;
|
|
struct list_head dirty_bgs;
|
|
|
|
/*
|
|
* There is no explicit lock which protects io_bgs, rather its
|
|
* consistency is implied by the fact that all the sites which modify
|
|
* it do so under some form of transaction critical section, namely:
|
|
*
|
|
* - btrfs_start_dirty_block_groups - This function can only ever be
|
|
* run by one of the transaction committers. Refer to
|
|
* BTRFS_TRANS_DIRTY_BG_RUN usage in btrfs_commit_transaction
|
|
*
|
|
* - btrfs_write_dirty_blockgroups - this is called by
|
|
* commit_cowonly_roots from transaction critical section
|
|
* (TRANS_STATE_COMMIT_DOING)
|
|
*
|
|
* - btrfs_cleanup_dirty_bgs - called on transaction abort
|
|
*/
|
|
struct list_head io_bgs;
|
|
struct list_head dropped_roots;
|
|
struct extent_io_tree pinned_extents;
|
|
|
|
/*
|
|
* we need to make sure block group deletion doesn't race with
|
|
* free space cache writeout. This mutex keeps them from stomping
|
|
* on each other
|
|
*/
|
|
struct mutex cache_write_mutex;
|
|
spinlock_t dirty_bgs_lock;
|
|
/* Protected by spin lock fs_info->unused_bgs_lock. */
|
|
struct list_head deleted_bgs;
|
|
spinlock_t dropped_roots_lock;
|
|
struct btrfs_delayed_ref_root delayed_refs;
|
|
struct btrfs_fs_info *fs_info;
|
|
};
|
|
|
|
#define __TRANS_FREEZABLE (1U << 0)
|
|
|
|
#define __TRANS_START (1U << 9)
|
|
#define __TRANS_ATTACH (1U << 10)
|
|
#define __TRANS_JOIN (1U << 11)
|
|
#define __TRANS_JOIN_NOLOCK (1U << 12)
|
|
#define __TRANS_DUMMY (1U << 13)
|
|
#define __TRANS_JOIN_NOSTART (1U << 14)
|
|
|
|
#define TRANS_START (__TRANS_START | __TRANS_FREEZABLE)
|
|
#define TRANS_ATTACH (__TRANS_ATTACH)
|
|
#define TRANS_JOIN (__TRANS_JOIN | __TRANS_FREEZABLE)
|
|
#define TRANS_JOIN_NOLOCK (__TRANS_JOIN_NOLOCK)
|
|
#define TRANS_JOIN_NOSTART (__TRANS_JOIN_NOSTART)
|
|
|
|
#define TRANS_EXTWRITERS (__TRANS_START | __TRANS_ATTACH)
|
|
|
|
#define BTRFS_SEND_TRANS_STUB ((void *)1)
|
|
|
|
struct btrfs_trans_handle {
|
|
u64 transid;
|
|
u64 bytes_reserved;
|
|
u64 chunk_bytes_reserved;
|
|
unsigned long delayed_ref_updates;
|
|
struct btrfs_transaction *transaction;
|
|
struct btrfs_block_rsv *block_rsv;
|
|
struct btrfs_block_rsv *orig_rsv;
|
|
refcount_t use_count;
|
|
unsigned int type;
|
|
/*
|
|
* Error code of transaction abort, set outside of locks and must use
|
|
* the READ_ONCE/WRITE_ONCE access
|
|
*/
|
|
short aborted;
|
|
bool adding_csums;
|
|
bool allocating_chunk;
|
|
bool can_flush_pending_bgs;
|
|
bool reloc_reserved;
|
|
bool dirty;
|
|
struct btrfs_root *root;
|
|
struct btrfs_fs_info *fs_info;
|
|
struct list_head new_bgs;
|
|
};
|
|
|
|
/*
|
|
* The abort status can be changed between calls and is not protected by locks.
|
|
* This accepts btrfs_transaction and btrfs_trans_handle as types. Once it's
|
|
* set to a non-zero value it does not change, so the macro should be in checks
|
|
* but is not necessary for further reads of the value.
|
|
*/
|
|
#define TRANS_ABORTED(trans) (unlikely(READ_ONCE((trans)->aborted)))
|
|
|
|
struct btrfs_pending_snapshot {
|
|
struct dentry *dentry;
|
|
struct inode *dir;
|
|
struct btrfs_root *root;
|
|
struct btrfs_root_item *root_item;
|
|
struct btrfs_root *snap;
|
|
struct btrfs_qgroup_inherit *inherit;
|
|
struct btrfs_path *path;
|
|
/* block reservation for the operation */
|
|
struct btrfs_block_rsv block_rsv;
|
|
/* extra metadata reservation for relocation */
|
|
int error;
|
|
bool readonly;
|
|
struct list_head list;
|
|
};
|
|
|
|
static inline void btrfs_set_inode_last_trans(struct btrfs_trans_handle *trans,
|
|
struct inode *inode)
|
|
{
|
|
spin_lock(&BTRFS_I(inode)->lock);
|
|
BTRFS_I(inode)->last_trans = trans->transaction->transid;
|
|
BTRFS_I(inode)->last_sub_trans = BTRFS_I(inode)->root->log_transid;
|
|
BTRFS_I(inode)->last_log_commit = BTRFS_I(inode)->root->last_log_commit;
|
|
spin_unlock(&BTRFS_I(inode)->lock);
|
|
}
|
|
|
|
/*
|
|
* Make qgroup codes to skip given qgroupid, means the old/new_roots for
|
|
* qgroup won't contain the qgroupid in it.
|
|
*/
|
|
static inline void btrfs_set_skip_qgroup(struct btrfs_trans_handle *trans,
|
|
u64 qgroupid)
|
|
{
|
|
struct btrfs_delayed_ref_root *delayed_refs;
|
|
|
|
delayed_refs = &trans->transaction->delayed_refs;
|
|
WARN_ON(delayed_refs->qgroup_to_skip);
|
|
delayed_refs->qgroup_to_skip = qgroupid;
|
|
}
|
|
|
|
static inline void btrfs_clear_skip_qgroup(struct btrfs_trans_handle *trans)
|
|
{
|
|
struct btrfs_delayed_ref_root *delayed_refs;
|
|
|
|
delayed_refs = &trans->transaction->delayed_refs;
|
|
WARN_ON(!delayed_refs->qgroup_to_skip);
|
|
delayed_refs->qgroup_to_skip = 0;
|
|
}
|
|
|
|
int btrfs_end_transaction(struct btrfs_trans_handle *trans);
|
|
struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root,
|
|
unsigned int num_items);
|
|
struct btrfs_trans_handle *btrfs_start_transaction_fallback_global_rsv(
|
|
struct btrfs_root *root,
|
|
unsigned int num_items,
|
|
int min_factor);
|
|
struct btrfs_trans_handle *btrfs_join_transaction(struct btrfs_root *root);
|
|
struct btrfs_trans_handle *btrfs_join_transaction_spacecache(struct btrfs_root *root);
|
|
struct btrfs_trans_handle *btrfs_join_transaction_nostart(struct btrfs_root *root);
|
|
struct btrfs_trans_handle *btrfs_attach_transaction(struct btrfs_root *root);
|
|
struct btrfs_trans_handle *btrfs_attach_transaction_barrier(
|
|
struct btrfs_root *root);
|
|
int btrfs_wait_for_commit(struct btrfs_fs_info *fs_info, u64 transid);
|
|
|
|
void btrfs_add_dead_root(struct btrfs_root *root);
|
|
int btrfs_defrag_root(struct btrfs_root *root);
|
|
int btrfs_clean_one_deleted_snapshot(struct btrfs_root *root);
|
|
int btrfs_commit_transaction(struct btrfs_trans_handle *trans);
|
|
int btrfs_commit_transaction_async(struct btrfs_trans_handle *trans,
|
|
int wait_for_unblock);
|
|
|
|
/*
|
|
* Try to commit transaction asynchronously, so this is safe to call
|
|
* even holding a spinlock.
|
|
*
|
|
* It's done by informing transaction_kthread to commit transaction without
|
|
* waiting for commit interval.
|
|
*/
|
|
static inline void btrfs_commit_transaction_locksafe(
|
|
struct btrfs_fs_info *fs_info)
|
|
{
|
|
set_bit(BTRFS_FS_NEED_ASYNC_COMMIT, &fs_info->flags);
|
|
wake_up_process(fs_info->transaction_kthread);
|
|
}
|
|
int btrfs_end_transaction_throttle(struct btrfs_trans_handle *trans);
|
|
int btrfs_should_end_transaction(struct btrfs_trans_handle *trans);
|
|
void btrfs_throttle(struct btrfs_fs_info *fs_info);
|
|
int btrfs_record_root_in_trans(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root);
|
|
int btrfs_write_marked_extents(struct btrfs_fs_info *fs_info,
|
|
struct extent_io_tree *dirty_pages, int mark);
|
|
int btrfs_wait_tree_log_extents(struct btrfs_root *root, int mark);
|
|
int btrfs_transaction_blocked(struct btrfs_fs_info *info);
|
|
int btrfs_transaction_in_commit(struct btrfs_fs_info *info);
|
|
void btrfs_put_transaction(struct btrfs_transaction *transaction);
|
|
void btrfs_apply_pending_changes(struct btrfs_fs_info *fs_info);
|
|
void btrfs_add_dropped_root(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root);
|
|
void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans);
|
|
|
|
#endif
|