| | 1 | /* |
| | 2 | * Copyright (C) 2008 Oracle. All rights reserved. |
| | 3 | * |
| | 4 | * This program is free software; you can redistribute it and/or |
| | 5 | * modify it under the terms of the GNU General Public |
| | 6 | * License v2 as published by the Free Software Foundation. |
| | 7 | * |
| | 8 | * This program is distributed in the hope that it will be useful, |
| | 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| | 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| | 11 | * General Public License for more details. |
| | 12 | * |
| | 13 | * You should have received a copy of the GNU General Public |
| | 14 | * License along with this program; if not, write to the |
| | 15 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| | 16 | * Boston, MA 021110-1307, USA. |
| | 17 | */ |
| | 18 | |
| | 19 | #ifndef __TREE_LOG_ |
| | 20 | #define __TREE_LOG_ |
| | 21 | |
| | 22 | #include "ctree.h" |
| | 23 | #include "transaction.h" |
| | 24 | |
| | 25 | /* return value for btrfs_log_dentry_safe that means we don't need to log it at all */ |
| | 26 | #define BTRFS_NO_LOG_SYNC 256 |
| | 27 | |
| | 28 | struct btrfs_log_ctx { |
| | 29 | int log_ret; |
| | 30 | int log_transid; |
| | 31 | int io_err; |
| | 32 | bool log_new_dentries; |
| | 33 | struct list_head list; |
| | 34 | }; |
| | 35 | |
| | 36 | static inline void btrfs_init_log_ctx(struct btrfs_log_ctx *ctx) |
| | 37 | { |
| | 38 | ctx->log_ret = 0; |
| | 39 | ctx->log_transid = 0; |
| | 40 | ctx->io_err = 0; |
| | 41 | ctx->log_new_dentries = false; |
| | 42 | INIT_LIST_HEAD(&ctx->list); |
| | 43 | } |
| | 44 | |
| | 45 | static inline void btrfs_set_log_full_commit(struct btrfs_fs_info *fs_info, |
| | 46 | struct btrfs_trans_handle *trans) |
| | 47 | { |
| | 48 | ACCESS_ONCE(fs_info->last_trans_log_full_commit) = trans->transid; |
| | 49 | } |
| | 50 | |
| | 51 | static inline int btrfs_need_log_full_commit(struct btrfs_fs_info *fs_info, |
| | 52 | struct btrfs_trans_handle *trans) |
| | 53 | { |
| | 54 | return ACCESS_ONCE(fs_info->last_trans_log_full_commit) == |
| | 55 | trans->transid; |
| | 56 | } |
| | 57 | |
| | 58 | int btrfs_sync_log(struct btrfs_trans_handle *trans, |
| | 59 | struct btrfs_root *root, struct btrfs_log_ctx *ctx); |
| | 60 | int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root); |
| | 61 | int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans, |
| | 62 | struct btrfs_fs_info *fs_info); |
| | 63 | int btrfs_recover_log_trees(struct btrfs_root *tree_root); |
| | 64 | int btrfs_log_dentry_safe(struct btrfs_trans_handle *trans, |
| | 65 | struct btrfs_root *root, struct dentry *dentry, |
| | 66 | const loff_t start, |
| | 67 | const loff_t end, |
| | 68 | struct btrfs_log_ctx *ctx); |
| | 69 | int btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans, |
| | 70 | struct btrfs_root *root, |
| | 71 | const char *name, int name_len, |
| | 72 | struct inode *dir, u64 index); |
| | 73 | int btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans, |
| | 74 | struct btrfs_root *root, |
| | 75 | const char *name, int name_len, |
| | 76 | struct inode *inode, u64 dirid); |
| | 77 | void btrfs_end_log_trans(struct btrfs_root *root); |
| | 78 | int btrfs_pin_log_trans(struct btrfs_root *root); |
| | 79 | void btrfs_record_unlink_dir(struct btrfs_trans_handle *trans, |
| | 80 | struct inode *dir, struct inode *inode, |
| | 81 | int for_rename); |
| | 82 | void btrfs_record_snapshot_destroy(struct btrfs_trans_handle *trans, |
| | 83 | struct inode *dir); |
| | 84 | int btrfs_log_new_name(struct btrfs_trans_handle *trans, |
| | 85 | struct inode *inode, struct inode *old_dir, |
| | 86 | struct dentry *parent); |
| | 87 | #endif |
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