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 88