mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-05 18:14:07 +08:00
5cce1780dc
Currently we use the value 1 for BTRFS_LOG_FORCE_COMMIT, but that value has a few inconveniences: 1) If it's ever used by btrfs_log_inode(), or any function down the call chain, we have to remember to btrfs_set_log_full_commit(), which is repetitive and has a chance to be forgotten in future use cases. btrfs_log_inode_parent() only calls btrfs_set_log_full_commit() when it gets a negative value from btrfs_log_inode(); 2) Down the call chain of btrfs_log_inode(), we may have functions that need to force a log commit, but can return either an error (negative value), false (0) or true (1). So they are forced to return some random negative to force a log commit - using BTRFS_LOG_FORCE_COMMIT would make the intention more clear. Currently the only example is flush_dir_items_batch(). So turn BTRFS_LOG_FORCE_COMMIT into a negative value. The chosen value is -(MAX_ERRNO + 1), so that it does not overlap any errno value and makes it easier to debug. Reviewed-by: Josef Bacik <josef@toxicpanda.com> Signed-off-by: Filipe Manana <fdmanana@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
111 lines
3.6 KiB
C
111 lines
3.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Copyright (C) 2008 Oracle. All rights reserved.
|
|
*/
|
|
|
|
#ifndef BTRFS_TREE_LOG_H
|
|
#define BTRFS_TREE_LOG_H
|
|
|
|
#include "messages.h"
|
|
#include "ctree.h"
|
|
#include "transaction.h"
|
|
|
|
/* return value for btrfs_log_dentry_safe that means we don't need to log it at all */
|
|
#define BTRFS_NO_LOG_SYNC 256
|
|
|
|
/*
|
|
* We can't use the tree log for whatever reason, force a transaction commit.
|
|
* We use a negative value because there are functions through the logging code
|
|
* that need to return an error (< 0 value), false (0) or true (1). Any negative
|
|
* value will do, as it will cause the log to be marked for a full sync.
|
|
*/
|
|
#define BTRFS_LOG_FORCE_COMMIT (-(MAX_ERRNO + 1))
|
|
|
|
struct btrfs_log_ctx {
|
|
int log_ret;
|
|
int log_transid;
|
|
bool log_new_dentries;
|
|
bool logging_new_name;
|
|
bool logging_new_delayed_dentries;
|
|
/* Indicate if the inode being logged was logged before. */
|
|
bool logged_before;
|
|
struct inode *inode;
|
|
struct list_head list;
|
|
/* Only used for fast fsyncs. */
|
|
struct list_head ordered_extents;
|
|
struct list_head conflict_inodes;
|
|
int num_conflict_inodes;
|
|
bool logging_conflict_inodes;
|
|
};
|
|
|
|
static inline void btrfs_init_log_ctx(struct btrfs_log_ctx *ctx,
|
|
struct inode *inode)
|
|
{
|
|
ctx->log_ret = 0;
|
|
ctx->log_transid = 0;
|
|
ctx->log_new_dentries = false;
|
|
ctx->logging_new_name = false;
|
|
ctx->logging_new_delayed_dentries = false;
|
|
ctx->logged_before = false;
|
|
ctx->inode = inode;
|
|
INIT_LIST_HEAD(&ctx->list);
|
|
INIT_LIST_HEAD(&ctx->ordered_extents);
|
|
INIT_LIST_HEAD(&ctx->conflict_inodes);
|
|
ctx->num_conflict_inodes = 0;
|
|
ctx->logging_conflict_inodes = false;
|
|
}
|
|
|
|
static inline void btrfs_release_log_ctx_extents(struct btrfs_log_ctx *ctx)
|
|
{
|
|
struct btrfs_ordered_extent *ordered;
|
|
struct btrfs_ordered_extent *tmp;
|
|
|
|
ASSERT(inode_is_locked(ctx->inode));
|
|
|
|
list_for_each_entry_safe(ordered, tmp, &ctx->ordered_extents, log_list) {
|
|
list_del_init(&ordered->log_list);
|
|
btrfs_put_ordered_extent(ordered);
|
|
}
|
|
}
|
|
|
|
static inline void btrfs_set_log_full_commit(struct btrfs_trans_handle *trans)
|
|
{
|
|
WRITE_ONCE(trans->fs_info->last_trans_log_full_commit, trans->transid);
|
|
}
|
|
|
|
static inline int btrfs_need_log_full_commit(struct btrfs_trans_handle *trans)
|
|
{
|
|
return READ_ONCE(trans->fs_info->last_trans_log_full_commit) ==
|
|
trans->transid;
|
|
}
|
|
|
|
int btrfs_sync_log(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root, struct btrfs_log_ctx *ctx);
|
|
int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root);
|
|
int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans,
|
|
struct btrfs_fs_info *fs_info);
|
|
int btrfs_recover_log_trees(struct btrfs_root *tree_root);
|
|
int btrfs_log_dentry_safe(struct btrfs_trans_handle *trans,
|
|
struct dentry *dentry,
|
|
struct btrfs_log_ctx *ctx);
|
|
void btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
const struct fscrypt_str *name,
|
|
struct btrfs_inode *dir, u64 index);
|
|
void btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
const struct fscrypt_str *name,
|
|
struct btrfs_inode *inode, u64 dirid);
|
|
void btrfs_end_log_trans(struct btrfs_root *root);
|
|
void btrfs_pin_log_trans(struct btrfs_root *root);
|
|
void btrfs_record_unlink_dir(struct btrfs_trans_handle *trans,
|
|
struct btrfs_inode *dir, struct btrfs_inode *inode,
|
|
int for_rename);
|
|
void btrfs_record_snapshot_destroy(struct btrfs_trans_handle *trans,
|
|
struct btrfs_inode *dir);
|
|
void btrfs_log_new_name(struct btrfs_trans_handle *trans,
|
|
struct dentry *old_dentry, struct btrfs_inode *old_dir,
|
|
u64 old_dir_index, struct dentry *parent);
|
|
|
|
#endif
|