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, 372ae99a60SMark Fasheh u8 flags, 38ccd979bdSMark Fasheh struct ocfs2_alloc_context *meta_ac); 39328d5752SMark Fasheh struct ocfs2_cached_dealloc_ctxt; 40328d5752SMark Fasheh int ocfs2_mark_extent_written(struct inode *inode, struct buffer_head *di_bh, 41328d5752SMark Fasheh handle_t *handle, u32 cpos, u32 len, u32 phys, 42328d5752SMark Fasheh struct ocfs2_alloc_context *meta_ac, 43328d5752SMark Fasheh struct ocfs2_cached_dealloc_ctxt *dealloc); 44063c4561SMark Fasheh int ocfs2_remove_extent(struct inode *inode, struct buffer_head *di_bh, 45063c4561SMark Fasheh u32 cpos, u32 len, handle_t *handle, 46063c4561SMark Fasheh struct ocfs2_alloc_context *meta_ac, 47063c4561SMark Fasheh struct ocfs2_cached_dealloc_ctxt *dealloc); 48ccd979bdSMark Fasheh int ocfs2_num_free_extents(struct ocfs2_super *osb, 49ccd979bdSMark Fasheh struct inode *inode, 50231b87d1STao Ma struct buffer_head *bh); 51811f933dSTao Ma /* 52811f933dSTao Ma * how many new metadata chunks would an allocation need at maximum? 53811f933dSTao Ma * 54811f933dSTao Ma * Please note that the caller must make sure that root_el is the root 55811f933dSTao Ma * of extent tree. So for an inode, it should be &fe->id2.i_list. Otherwise 56811f933dSTao Ma * the result may be wrong. 57811f933dSTao Ma */ 58811f933dSTao Ma static inline int ocfs2_extend_meta_needed(struct ocfs2_extent_list *root_el) 59ccd979bdSMark Fasheh { 60ccd979bdSMark Fasheh /* 61ccd979bdSMark Fasheh * Rather than do all the work of determining how much we need 62ccd979bdSMark Fasheh * (involves a ton of reads and locks), just ask for the 63ccd979bdSMark Fasheh * maximal limit. That's a tree depth shift. So, one block for 64ccd979bdSMark Fasheh * level of the tree (current l_tree_depth), one block for the 65ccd979bdSMark Fasheh * new tree_depth==0 extent_block, and one block at the new 66ccd979bdSMark Fasheh * top-of-the tree. 67ccd979bdSMark Fasheh */ 68811f933dSTao Ma return le16_to_cpu(root_el->l_tree_depth) + 2; 69ccd979bdSMark Fasheh } 70ccd979bdSMark Fasheh 715b6a3a2bSMark Fasheh void ocfs2_dinode_new_extent_list(struct inode *inode, struct ocfs2_dinode *di); 721afc32b9SMark Fasheh void ocfs2_set_inode_data_inline(struct inode *inode, struct ocfs2_dinode *di); 731afc32b9SMark Fasheh int ocfs2_convert_inline_data_to_extents(struct inode *inode, 741afc32b9SMark Fasheh struct buffer_head *di_bh); 751afc32b9SMark Fasheh 76ccd979bdSMark Fasheh int ocfs2_truncate_log_init(struct ocfs2_super *osb); 77ccd979bdSMark Fasheh void ocfs2_truncate_log_shutdown(struct ocfs2_super *osb); 78ccd979bdSMark Fasheh void ocfs2_schedule_truncate_log_flush(struct ocfs2_super *osb, 79ccd979bdSMark Fasheh int cancel); 80ccd979bdSMark Fasheh int ocfs2_flush_truncate_log(struct ocfs2_super *osb); 81ccd979bdSMark Fasheh int ocfs2_begin_truncate_log_recovery(struct ocfs2_super *osb, 82ccd979bdSMark Fasheh int slot_num, 83ccd979bdSMark Fasheh struct ocfs2_dinode **tl_copy); 84ccd979bdSMark Fasheh int ocfs2_complete_truncate_log_recovery(struct ocfs2_super *osb, 85ccd979bdSMark Fasheh struct ocfs2_dinode *tl_copy); 86063c4561SMark Fasheh int ocfs2_truncate_log_needs_flush(struct ocfs2_super *osb); 87063c4561SMark Fasheh int ocfs2_truncate_log_append(struct ocfs2_super *osb, 88063c4561SMark Fasheh handle_t *handle, 89063c4561SMark Fasheh u64 start_blk, 90063c4561SMark Fasheh unsigned int num_clusters); 91063c4561SMark Fasheh int __ocfs2_flush_truncate_log(struct ocfs2_super *osb); 92ccd979bdSMark Fasheh 932b604351SMark Fasheh /* 942b604351SMark Fasheh * Process local structure which describes the block unlinks done 952b604351SMark Fasheh * during an operation. This is populated via 962b604351SMark Fasheh * ocfs2_cache_block_dealloc(). 972b604351SMark Fasheh * 982b604351SMark Fasheh * ocfs2_run_deallocs() should be called after the potentially 992b604351SMark Fasheh * de-allocating routines. No journal handles should be open, and most 1002b604351SMark Fasheh * locks should have been dropped. 1012b604351SMark Fasheh */ 1022b604351SMark Fasheh struct ocfs2_cached_dealloc_ctxt { 1032b604351SMark Fasheh struct ocfs2_per_slot_free_list *c_first_suballocator; 1042b604351SMark Fasheh }; 1052b604351SMark Fasheh static inline void ocfs2_init_dealloc_ctxt(struct ocfs2_cached_dealloc_ctxt *c) 1062b604351SMark Fasheh { 1072b604351SMark Fasheh c->c_first_suballocator = NULL; 1082b604351SMark Fasheh } 1092b604351SMark Fasheh int ocfs2_run_deallocs(struct ocfs2_super *osb, 1102b604351SMark Fasheh struct ocfs2_cached_dealloc_ctxt *ctxt); 1112b604351SMark Fasheh 112ccd979bdSMark Fasheh struct ocfs2_truncate_context { 11359a5e416SMark Fasheh struct ocfs2_cached_dealloc_ctxt tc_dealloc; 114ccd979bdSMark Fasheh int tc_ext_alloc_locked; /* is it cluster locked? */ 115ccd979bdSMark Fasheh /* these get destroyed once it's passed to ocfs2_commit_truncate. */ 116ccd979bdSMark Fasheh struct buffer_head *tc_last_eb_bh; 117ccd979bdSMark Fasheh }; 118ccd979bdSMark Fasheh 11935edec1dSMark Fasheh int ocfs2_zero_range_for_truncate(struct inode *inode, handle_t *handle, 12035edec1dSMark Fasheh u64 range_start, u64 range_end); 121ccd979bdSMark Fasheh int ocfs2_prepare_truncate(struct ocfs2_super *osb, 122ccd979bdSMark Fasheh struct inode *inode, 123ccd979bdSMark Fasheh struct buffer_head *fe_bh, 124ccd979bdSMark Fasheh struct ocfs2_truncate_context **tc); 125ccd979bdSMark Fasheh int ocfs2_commit_truncate(struct ocfs2_super *osb, 126ccd979bdSMark Fasheh struct inode *inode, 127ccd979bdSMark Fasheh struct buffer_head *fe_bh, 128ccd979bdSMark Fasheh struct ocfs2_truncate_context *tc); 1291afc32b9SMark Fasheh int ocfs2_truncate_inline(struct inode *inode, struct buffer_head *di_bh, 1301afc32b9SMark Fasheh unsigned int start, unsigned int end, int trunc); 131ccd979bdSMark Fasheh 132363041a5SMark Fasheh int ocfs2_find_leaf(struct inode *inode, struct ocfs2_extent_list *root_el, 133363041a5SMark Fasheh u32 cpos, struct buffer_head **leaf_bh); 134328d5752SMark Fasheh int ocfs2_search_extent_list(struct ocfs2_extent_list *el, u32 v_cluster); 135363041a5SMark Fasheh 136e48edee2SMark Fasheh /* 137e48edee2SMark Fasheh * Helper function to look at the # of clusters in an extent record. 138e48edee2SMark Fasheh */ 139e48edee2SMark Fasheh static inline unsigned int ocfs2_rec_clusters(struct ocfs2_extent_list *el, 140e48edee2SMark Fasheh struct ocfs2_extent_rec *rec) 141e48edee2SMark Fasheh { 142e48edee2SMark Fasheh /* 143e48edee2SMark Fasheh * Cluster count in extent records is slightly different 144e48edee2SMark Fasheh * between interior nodes and leaf nodes. This is to support 145e48edee2SMark Fasheh * unwritten extents which need a flags field in leaf node 146e48edee2SMark Fasheh * records, thus shrinking the available space for a clusters 147e48edee2SMark Fasheh * field. 148e48edee2SMark Fasheh */ 149e48edee2SMark Fasheh if (el->l_tree_depth) 150e48edee2SMark Fasheh return le32_to_cpu(rec->e_int_clusters); 151e48edee2SMark Fasheh else 152e48edee2SMark Fasheh return le16_to_cpu(rec->e_leaf_clusters); 153e48edee2SMark Fasheh } 154e48edee2SMark Fasheh 15500dc417fSMark Fasheh /* 15600dc417fSMark Fasheh * This is only valid for leaf nodes, which are the only ones that can 15700dc417fSMark Fasheh * have empty extents anyway. 15800dc417fSMark Fasheh */ 15900dc417fSMark Fasheh static inline int ocfs2_is_empty_extent(struct ocfs2_extent_rec *rec) 16000dc417fSMark Fasheh { 16100dc417fSMark Fasheh return !rec->e_leaf_clusters; 16200dc417fSMark Fasheh } 16300dc417fSMark Fasheh 164ccd979bdSMark Fasheh #endif /* OCFS2_ALLOC_H */ 165