1ccd979bdSMark Fasheh /* -*- mode: c; c-basic-offset: 8; -*- 2ccd979bdSMark Fasheh * vim: noexpandtab sw=8 ts=8 sts=0: 3ccd979bdSMark Fasheh * 4ccd979bdSMark Fasheh * alloc.h 5ccd979bdSMark Fasheh * 6ccd979bdSMark Fasheh * Function prototypes 7ccd979bdSMark Fasheh * 8ccd979bdSMark Fasheh * Copyright (C) 2002, 2004 Oracle. All rights reserved. 9ccd979bdSMark Fasheh * 10ccd979bdSMark Fasheh * This program is free software; you can redistribute it and/or 11ccd979bdSMark Fasheh * modify it under the terms of the GNU General Public 12ccd979bdSMark Fasheh * License as published by the Free Software Foundation; either 13ccd979bdSMark Fasheh * version 2 of the License, or (at your option) any later version. 14ccd979bdSMark Fasheh * 15ccd979bdSMark Fasheh * This program is distributed in the hope that it will be useful, 16ccd979bdSMark Fasheh * but WITHOUT ANY WARRANTY; without even the implied warranty of 17ccd979bdSMark Fasheh * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18ccd979bdSMark Fasheh * General Public License for more details. 19ccd979bdSMark Fasheh * 20ccd979bdSMark Fasheh * You should have received a copy of the GNU General Public 21ccd979bdSMark Fasheh * License along with this program; if not, write to the 22ccd979bdSMark Fasheh * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 23ccd979bdSMark Fasheh * Boston, MA 021110-1307, USA. 24ccd979bdSMark Fasheh */ 25ccd979bdSMark Fasheh 26ccd979bdSMark Fasheh #ifndef OCFS2_ALLOC_H 27ccd979bdSMark Fasheh #define OCFS2_ALLOC_H 28ccd979bdSMark Fasheh 29ccd979bdSMark Fasheh struct ocfs2_alloc_context; 30ccd979bdSMark Fasheh int ocfs2_insert_extent(struct ocfs2_super *osb, 311fabe148SMark Fasheh handle_t *handle, 32ccd979bdSMark Fasheh struct inode *inode, 33ccd979bdSMark Fasheh struct buffer_head *fe_bh, 34dcd0538fSMark Fasheh u32 cpos, 35dcd0538fSMark Fasheh u64 start_blk, 36ccd979bdSMark Fasheh u32 new_clusters, 37ccd979bdSMark Fasheh struct ocfs2_alloc_context *meta_ac); 38ccd979bdSMark Fasheh int ocfs2_num_free_extents(struct ocfs2_super *osb, 39ccd979bdSMark Fasheh struct inode *inode, 40ccd979bdSMark Fasheh struct ocfs2_dinode *fe); 41ccd979bdSMark Fasheh /* how many new metadata chunks would an allocation need at maximum? */ 42ccd979bdSMark Fasheh static inline int ocfs2_extend_meta_needed(struct ocfs2_dinode *fe) 43ccd979bdSMark Fasheh { 44ccd979bdSMark Fasheh /* 45ccd979bdSMark Fasheh * Rather than do all the work of determining how much we need 46ccd979bdSMark Fasheh * (involves a ton of reads and locks), just ask for the 47ccd979bdSMark Fasheh * maximal limit. That's a tree depth shift. So, one block for 48ccd979bdSMark Fasheh * level of the tree (current l_tree_depth), one block for the 49ccd979bdSMark Fasheh * new tree_depth==0 extent_block, and one block at the new 50ccd979bdSMark Fasheh * top-of-the tree. 51ccd979bdSMark Fasheh */ 52ccd979bdSMark Fasheh return le16_to_cpu(fe->id2.i_list.l_tree_depth) + 2; 53ccd979bdSMark Fasheh } 54ccd979bdSMark Fasheh 55ccd979bdSMark Fasheh int ocfs2_truncate_log_init(struct ocfs2_super *osb); 56ccd979bdSMark Fasheh void ocfs2_truncate_log_shutdown(struct ocfs2_super *osb); 57ccd979bdSMark Fasheh void ocfs2_schedule_truncate_log_flush(struct ocfs2_super *osb, 58ccd979bdSMark Fasheh int cancel); 59ccd979bdSMark Fasheh int ocfs2_flush_truncate_log(struct ocfs2_super *osb); 60ccd979bdSMark Fasheh int ocfs2_begin_truncate_log_recovery(struct ocfs2_super *osb, 61ccd979bdSMark Fasheh int slot_num, 62ccd979bdSMark Fasheh struct ocfs2_dinode **tl_copy); 63ccd979bdSMark Fasheh int ocfs2_complete_truncate_log_recovery(struct ocfs2_super *osb, 64ccd979bdSMark Fasheh struct ocfs2_dinode *tl_copy); 65ccd979bdSMark Fasheh 66ccd979bdSMark Fasheh struct ocfs2_truncate_context { 67ccd979bdSMark Fasheh struct inode *tc_ext_alloc_inode; 68ccd979bdSMark Fasheh struct buffer_head *tc_ext_alloc_bh; 69ccd979bdSMark Fasheh int tc_ext_alloc_locked; /* is it cluster locked? */ 70ccd979bdSMark Fasheh /* these get destroyed once it's passed to ocfs2_commit_truncate. */ 71ccd979bdSMark Fasheh struct buffer_head *tc_last_eb_bh; 72ccd979bdSMark Fasheh }; 73ccd979bdSMark Fasheh 74ccd979bdSMark Fasheh int ocfs2_prepare_truncate(struct ocfs2_super *osb, 75ccd979bdSMark Fasheh struct inode *inode, 76ccd979bdSMark Fasheh struct buffer_head *fe_bh, 77ccd979bdSMark Fasheh struct ocfs2_truncate_context **tc); 78ccd979bdSMark Fasheh int ocfs2_commit_truncate(struct ocfs2_super *osb, 79ccd979bdSMark Fasheh struct inode *inode, 80ccd979bdSMark Fasheh struct buffer_head *fe_bh, 81ccd979bdSMark Fasheh struct ocfs2_truncate_context *tc); 82ccd979bdSMark Fasheh 83363041a5SMark Fasheh int ocfs2_find_leaf(struct inode *inode, struct ocfs2_extent_list *root_el, 84363041a5SMark Fasheh u32 cpos, struct buffer_head **leaf_bh); 85363041a5SMark Fasheh 86ccd979bdSMark Fasheh #endif /* OCFS2_ALLOC_H */ 87