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 29e7d4cb6bSTao Ma enum ocfs2_extent_tree_type { 30e7d4cb6bSTao Ma OCFS2_DINODE_EXTENT = 0, 31e7d4cb6bSTao Ma }; 32e7d4cb6bSTao Ma 33ccd979bdSMark Fasheh struct ocfs2_alloc_context; 34ccd979bdSMark Fasheh int ocfs2_insert_extent(struct ocfs2_super *osb, 351fabe148SMark Fasheh handle_t *handle, 36ccd979bdSMark Fasheh struct inode *inode, 37e7d4cb6bSTao Ma struct buffer_head *root_bh, 38dcd0538fSMark Fasheh u32 cpos, 39dcd0538fSMark Fasheh u64 start_blk, 40ccd979bdSMark Fasheh u32 new_clusters, 412ae99a60SMark Fasheh u8 flags, 42e7d4cb6bSTao Ma struct ocfs2_alloc_context *meta_ac, 43e7d4cb6bSTao Ma enum ocfs2_extent_tree_type et_type); 440eb8d47eSTao Ma enum ocfs2_alloc_restarted { 450eb8d47eSTao Ma RESTART_NONE = 0, 460eb8d47eSTao Ma RESTART_TRANS, 470eb8d47eSTao Ma RESTART_META 480eb8d47eSTao Ma }; 490eb8d47eSTao Ma int ocfs2_add_clusters_in_btree(struct ocfs2_super *osb, 500eb8d47eSTao Ma struct inode *inode, 510eb8d47eSTao Ma u32 *logical_offset, 520eb8d47eSTao Ma u32 clusters_to_add, 530eb8d47eSTao Ma int mark_unwritten, 540eb8d47eSTao Ma struct buffer_head *root_bh, 550eb8d47eSTao Ma struct ocfs2_extent_list *root_el, 560eb8d47eSTao Ma handle_t *handle, 570eb8d47eSTao Ma struct ocfs2_alloc_context *data_ac, 580eb8d47eSTao Ma struct ocfs2_alloc_context *meta_ac, 590eb8d47eSTao Ma enum ocfs2_alloc_restarted *reason_ret, 600eb8d47eSTao Ma enum ocfs2_extent_tree_type type); 61328d5752SMark Fasheh struct ocfs2_cached_dealloc_ctxt; 62e7d4cb6bSTao Ma int ocfs2_mark_extent_written(struct inode *inode, struct buffer_head *root_bh, 63328d5752SMark Fasheh handle_t *handle, u32 cpos, u32 len, u32 phys, 64328d5752SMark Fasheh struct ocfs2_alloc_context *meta_ac, 65e7d4cb6bSTao Ma struct ocfs2_cached_dealloc_ctxt *dealloc, 66e7d4cb6bSTao Ma enum ocfs2_extent_tree_type et_type); 67e7d4cb6bSTao Ma int ocfs2_remove_extent(struct inode *inode, struct buffer_head *root_bh, 68063c4561SMark Fasheh u32 cpos, u32 len, handle_t *handle, 69063c4561SMark Fasheh struct ocfs2_alloc_context *meta_ac, 70e7d4cb6bSTao Ma struct ocfs2_cached_dealloc_ctxt *dealloc, 71e7d4cb6bSTao Ma enum ocfs2_extent_tree_type et_type); 72ccd979bdSMark Fasheh int ocfs2_num_free_extents(struct ocfs2_super *osb, 73ccd979bdSMark Fasheh struct inode *inode, 74e7d4cb6bSTao Ma struct buffer_head *root_bh, 75e7d4cb6bSTao Ma enum ocfs2_extent_tree_type et_type); 76e7d4cb6bSTao Ma 77811f933dSTao Ma /* 78811f933dSTao Ma * how many new metadata chunks would an allocation need at maximum? 79811f933dSTao Ma * 80811f933dSTao Ma * Please note that the caller must make sure that root_el is the root 81811f933dSTao Ma * of extent tree. So for an inode, it should be &fe->id2.i_list. Otherwise 82811f933dSTao Ma * the result may be wrong. 83811f933dSTao Ma */ 84811f933dSTao Ma static inline int ocfs2_extend_meta_needed(struct ocfs2_extent_list *root_el) 85ccd979bdSMark Fasheh { 86ccd979bdSMark Fasheh /* 87ccd979bdSMark Fasheh * Rather than do all the work of determining how much we need 88ccd979bdSMark Fasheh * (involves a ton of reads and locks), just ask for the 89ccd979bdSMark Fasheh * maximal limit. That's a tree depth shift. So, one block for 90ccd979bdSMark Fasheh * level of the tree (current l_tree_depth), one block for the 91ccd979bdSMark Fasheh * new tree_depth==0 extent_block, and one block at the new 92ccd979bdSMark Fasheh * top-of-the tree. 93ccd979bdSMark Fasheh */ 94811f933dSTao Ma return le16_to_cpu(root_el->l_tree_depth) + 2; 95ccd979bdSMark Fasheh } 96ccd979bdSMark Fasheh 975b6a3a2bSMark Fasheh void ocfs2_dinode_new_extent_list(struct inode *inode, struct ocfs2_dinode *di); 981afc32b9SMark Fasheh void ocfs2_set_inode_data_inline(struct inode *inode, struct ocfs2_dinode *di); 991afc32b9SMark Fasheh int ocfs2_convert_inline_data_to_extents(struct inode *inode, 1001afc32b9SMark Fasheh struct buffer_head *di_bh); 1011afc32b9SMark Fasheh 102ccd979bdSMark Fasheh int ocfs2_truncate_log_init(struct ocfs2_super *osb); 103ccd979bdSMark Fasheh void ocfs2_truncate_log_shutdown(struct ocfs2_super *osb); 104ccd979bdSMark Fasheh void ocfs2_schedule_truncate_log_flush(struct ocfs2_super *osb, 105ccd979bdSMark Fasheh int cancel); 106ccd979bdSMark Fasheh int ocfs2_flush_truncate_log(struct ocfs2_super *osb); 107ccd979bdSMark Fasheh int ocfs2_begin_truncate_log_recovery(struct ocfs2_super *osb, 108ccd979bdSMark Fasheh int slot_num, 109ccd979bdSMark Fasheh struct ocfs2_dinode **tl_copy); 110ccd979bdSMark Fasheh int ocfs2_complete_truncate_log_recovery(struct ocfs2_super *osb, 111ccd979bdSMark Fasheh struct ocfs2_dinode *tl_copy); 112063c4561SMark Fasheh int ocfs2_truncate_log_needs_flush(struct ocfs2_super *osb); 113063c4561SMark Fasheh int ocfs2_truncate_log_append(struct ocfs2_super *osb, 114063c4561SMark Fasheh handle_t *handle, 115063c4561SMark Fasheh u64 start_blk, 116063c4561SMark Fasheh unsigned int num_clusters); 117063c4561SMark Fasheh int __ocfs2_flush_truncate_log(struct ocfs2_super *osb); 118ccd979bdSMark Fasheh 1192b604351SMark Fasheh /* 1202b604351SMark Fasheh * Process local structure which describes the block unlinks done 1212b604351SMark Fasheh * during an operation. This is populated via 1222b604351SMark Fasheh * ocfs2_cache_block_dealloc(). 1232b604351SMark Fasheh * 1242b604351SMark Fasheh * ocfs2_run_deallocs() should be called after the potentially 1252b604351SMark Fasheh * de-allocating routines. No journal handles should be open, and most 1262b604351SMark Fasheh * locks should have been dropped. 1272b604351SMark Fasheh */ 1282b604351SMark Fasheh struct ocfs2_cached_dealloc_ctxt { 1292b604351SMark Fasheh struct ocfs2_per_slot_free_list *c_first_suballocator; 1302b604351SMark Fasheh }; 1312b604351SMark Fasheh static inline void ocfs2_init_dealloc_ctxt(struct ocfs2_cached_dealloc_ctxt *c) 1322b604351SMark Fasheh { 1332b604351SMark Fasheh c->c_first_suballocator = NULL; 1342b604351SMark Fasheh } 1352b604351SMark Fasheh int ocfs2_run_deallocs(struct ocfs2_super *osb, 1362b604351SMark Fasheh struct ocfs2_cached_dealloc_ctxt *ctxt); 1372b604351SMark Fasheh 138ccd979bdSMark Fasheh struct ocfs2_truncate_context { 13959a5e416SMark Fasheh struct ocfs2_cached_dealloc_ctxt tc_dealloc; 140ccd979bdSMark Fasheh int tc_ext_alloc_locked; /* is it cluster locked? */ 141ccd979bdSMark Fasheh /* these get destroyed once it's passed to ocfs2_commit_truncate. */ 142ccd979bdSMark Fasheh struct buffer_head *tc_last_eb_bh; 143ccd979bdSMark Fasheh }; 144ccd979bdSMark Fasheh 14535edec1dSMark Fasheh int ocfs2_zero_range_for_truncate(struct inode *inode, handle_t *handle, 14635edec1dSMark Fasheh u64 range_start, u64 range_end); 147ccd979bdSMark Fasheh int ocfs2_prepare_truncate(struct ocfs2_super *osb, 148ccd979bdSMark Fasheh struct inode *inode, 149ccd979bdSMark Fasheh struct buffer_head *fe_bh, 150ccd979bdSMark Fasheh struct ocfs2_truncate_context **tc); 151ccd979bdSMark Fasheh int ocfs2_commit_truncate(struct ocfs2_super *osb, 152ccd979bdSMark Fasheh struct inode *inode, 153ccd979bdSMark Fasheh struct buffer_head *fe_bh, 154ccd979bdSMark Fasheh struct ocfs2_truncate_context *tc); 1551afc32b9SMark Fasheh int ocfs2_truncate_inline(struct inode *inode, struct buffer_head *di_bh, 1561afc32b9SMark Fasheh unsigned int start, unsigned int end, int trunc); 157ccd979bdSMark Fasheh 158363041a5SMark Fasheh int ocfs2_find_leaf(struct inode *inode, struct ocfs2_extent_list *root_el, 159363041a5SMark Fasheh u32 cpos, struct buffer_head **leaf_bh); 160328d5752SMark Fasheh int ocfs2_search_extent_list(struct ocfs2_extent_list *el, u32 v_cluster); 161363041a5SMark Fasheh 162e48edee2SMark Fasheh /* 163e48edee2SMark Fasheh * Helper function to look at the # of clusters in an extent record. 164e48edee2SMark Fasheh */ 165e48edee2SMark Fasheh static inline unsigned int ocfs2_rec_clusters(struct ocfs2_extent_list *el, 166e48edee2SMark Fasheh struct ocfs2_extent_rec *rec) 167e48edee2SMark Fasheh { 168e48edee2SMark Fasheh /* 169e48edee2SMark Fasheh * Cluster count in extent records is slightly different 170e48edee2SMark Fasheh * between interior nodes and leaf nodes. This is to support 171e48edee2SMark Fasheh * unwritten extents which need a flags field in leaf node 172e48edee2SMark Fasheh * records, thus shrinking the available space for a clusters 173e48edee2SMark Fasheh * field. 174e48edee2SMark Fasheh */ 175e48edee2SMark Fasheh if (el->l_tree_depth) 176e48edee2SMark Fasheh return le32_to_cpu(rec->e_int_clusters); 177e48edee2SMark Fasheh else 178e48edee2SMark Fasheh return le16_to_cpu(rec->e_leaf_clusters); 179e48edee2SMark Fasheh } 180e48edee2SMark Fasheh 18100dc417fSMark Fasheh /* 18200dc417fSMark Fasheh * This is only valid for leaf nodes, which are the only ones that can 18300dc417fSMark Fasheh * have empty extents anyway. 18400dc417fSMark Fasheh */ 18500dc417fSMark Fasheh static inline int ocfs2_is_empty_extent(struct ocfs2_extent_rec *rec) 18600dc417fSMark Fasheh { 18700dc417fSMark Fasheh return !rec->e_leaf_clusters; 18800dc417fSMark Fasheh } 18900dc417fSMark Fasheh 190ccd979bdSMark Fasheh #endif /* OCFS2_ALLOC_H */ 191