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Linux/fs/btrfs/tree-log.h

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  1 /* SPDX-License-Identifier: GPL-2.0 */
  2 /*
  3  * Copyright (C) 2008 Oracle.  All rights reserved.
  4  */
  5 
  6 #ifndef BTRFS_TREE_LOG_H
  7 #define BTRFS_TREE_LOG_H
  8 
  9 #include "ctree.h"
 10 #include "transaction.h"
 11 
 12 /* return value for btrfs_log_dentry_safe that means we don't need to log it at all */
 13 #define BTRFS_NO_LOG_SYNC 256
 14 
 15 struct btrfs_log_ctx {
 16         int log_ret;
 17         int log_transid;
 18         bool log_new_dentries;
 19         struct inode *inode;
 20         struct list_head list;
 21 };
 22 
 23 static inline void btrfs_init_log_ctx(struct btrfs_log_ctx *ctx,
 24                                       struct inode *inode)
 25 {
 26         ctx->log_ret = 0;
 27         ctx->log_transid = 0;
 28         ctx->log_new_dentries = false;
 29         ctx->inode = inode;
 30         INIT_LIST_HEAD(&ctx->list);
 31 }
 32 
 33 static inline void btrfs_set_log_full_commit(struct btrfs_fs_info *fs_info,
 34                                              struct btrfs_trans_handle *trans)
 35 {
 36         WRITE_ONCE(fs_info->last_trans_log_full_commit, trans->transid);
 37 }
 38 
 39 static inline int btrfs_need_log_full_commit(struct btrfs_fs_info *fs_info,
 40                                              struct btrfs_trans_handle *trans)
 41 {
 42         return READ_ONCE(fs_info->last_trans_log_full_commit) ==
 43                 trans->transid;
 44 }
 45 
 46 int btrfs_sync_log(struct btrfs_trans_handle *trans,
 47                    struct btrfs_root *root, struct btrfs_log_ctx *ctx);
 48 int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root);
 49 int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans,
 50                              struct btrfs_fs_info *fs_info);
 51 int btrfs_recover_log_trees(struct btrfs_root *tree_root);
 52 int btrfs_log_dentry_safe(struct btrfs_trans_handle *trans,
 53                           struct dentry *dentry,
 54                           const loff_t start,
 55                           const loff_t end,
 56                           struct btrfs_log_ctx *ctx);
 57 int btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans,
 58                                  struct btrfs_root *root,
 59                                  const char *name, int name_len,
 60                                  struct btrfs_inode *dir, u64 index);
 61 int btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans,
 62                                struct btrfs_root *root,
 63                                const char *name, int name_len,
 64                                struct btrfs_inode *inode, u64 dirid);
 65 void btrfs_end_log_trans(struct btrfs_root *root);
 66 void btrfs_pin_log_trans(struct btrfs_root *root);
 67 void btrfs_record_unlink_dir(struct btrfs_trans_handle *trans,
 68                              struct btrfs_inode *dir, struct btrfs_inode *inode,
 69                              int for_rename);
 70 void btrfs_record_snapshot_destroy(struct btrfs_trans_handle *trans,
 71                                    struct btrfs_inode *dir);
 72 /* Return values for btrfs_log_new_name() */
 73 enum {
 74         BTRFS_DONT_NEED_TRANS_COMMIT,
 75         BTRFS_NEED_TRANS_COMMIT,
 76         BTRFS_DONT_NEED_LOG_SYNC,
 77         BTRFS_NEED_LOG_SYNC,
 78 };
 79 int btrfs_log_new_name(struct btrfs_trans_handle *trans,
 80                         struct btrfs_inode *inode, struct btrfs_inode *old_dir,
 81                         struct dentry *parent,
 82                         bool sync_log, struct btrfs_log_ctx *ctx);
 83 
 84 #endif
 85 

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