| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame^] | 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 | int io_err; |
| 19 | bool log_new_dentries; |
| 20 | struct inode *inode; |
| 21 | struct list_head list; |
| 22 | }; |
| 23 | |
| 24 | static inline void btrfs_init_log_ctx(struct btrfs_log_ctx *ctx, |
| 25 | struct inode *inode) |
| 26 | { |
| 27 | ctx->log_ret = 0; |
| 28 | ctx->log_transid = 0; |
| 29 | ctx->io_err = 0; |
| 30 | ctx->log_new_dentries = false; |
| 31 | ctx->inode = inode; |
| 32 | INIT_LIST_HEAD(&ctx->list); |
| 33 | } |
| 34 | |
| 35 | static inline void btrfs_set_log_full_commit(struct btrfs_fs_info *fs_info, |
| 36 | struct btrfs_trans_handle *trans) |
| 37 | { |
| 38 | WRITE_ONCE(fs_info->last_trans_log_full_commit, trans->transid); |
| 39 | } |
| 40 | |
| 41 | static inline int btrfs_need_log_full_commit(struct btrfs_fs_info *fs_info, |
| 42 | struct btrfs_trans_handle *trans) |
| 43 | { |
| 44 | return READ_ONCE(fs_info->last_trans_log_full_commit) == |
| 45 | trans->transid; |
| 46 | } |
| 47 | |
| 48 | int btrfs_sync_log(struct btrfs_trans_handle *trans, |
| 49 | struct btrfs_root *root, struct btrfs_log_ctx *ctx); |
| 50 | int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root); |
| 51 | int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans, |
| 52 | struct btrfs_fs_info *fs_info); |
| 53 | int btrfs_recover_log_trees(struct btrfs_root *tree_root); |
| 54 | int btrfs_log_dentry_safe(struct btrfs_trans_handle *trans, |
| 55 | struct dentry *dentry, |
| 56 | const loff_t start, |
| 57 | const loff_t end, |
| 58 | struct btrfs_log_ctx *ctx); |
| 59 | int btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans, |
| 60 | struct btrfs_root *root, |
| 61 | const char *name, int name_len, |
| 62 | struct btrfs_inode *dir, u64 index); |
| 63 | int btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans, |
| 64 | struct btrfs_root *root, |
| 65 | const char *name, int name_len, |
| 66 | struct btrfs_inode *inode, u64 dirid); |
| 67 | void btrfs_end_log_trans(struct btrfs_root *root); |
| 68 | int btrfs_pin_log_trans(struct btrfs_root *root); |
| 69 | void btrfs_record_unlink_dir(struct btrfs_trans_handle *trans, |
| 70 | struct btrfs_inode *dir, struct btrfs_inode *inode, |
| 71 | int for_rename); |
| 72 | void btrfs_record_snapshot_destroy(struct btrfs_trans_handle *trans, |
| 73 | struct btrfs_inode *dir); |
| 74 | /* Return values for btrfs_log_new_name() */ |
| 75 | enum { |
| 76 | BTRFS_DONT_NEED_TRANS_COMMIT, |
| 77 | BTRFS_NEED_TRANS_COMMIT, |
| 78 | BTRFS_DONT_NEED_LOG_SYNC, |
| 79 | BTRFS_NEED_LOG_SYNC, |
| 80 | }; |
| 81 | int btrfs_log_new_name(struct btrfs_trans_handle *trans, |
| 82 | struct btrfs_inode *inode, struct btrfs_inode *old_dir, |
| 83 | struct dentry *parent, |
| 84 | bool sync_log, struct btrfs_log_ctx *ctx); |
| 85 | |
| 86 | #endif |