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, 31f56654c4STao Ma OCFS2_XATTR_VALUE_EXTENT, 32ba492615STao Ma OCFS2_XATTR_TREE_EXTENT, 33e7d4cb6bSTao Ma }; 34e7d4cb6bSTao Ma 35ca12b7c4STao Ma /* 36ca12b7c4STao Ma * For xattr tree leaf, we limit the leaf byte size to be 64K. 37ca12b7c4STao Ma */ 38ca12b7c4STao Ma #define OCFS2_MAX_XATTR_TREE_LEAF_SIZE 65536 39ca12b7c4STao Ma 40ccd979bdSMark Fasheh struct ocfs2_alloc_context; 41f56654c4STao Ma int ocfs2_dinode_insert_extent(struct ocfs2_super *osb, 42f56654c4STao Ma handle_t *handle, 43f56654c4STao Ma struct inode *inode, 44f56654c4STao Ma struct buffer_head *root_bh, 45f56654c4STao Ma u32 cpos, 46f56654c4STao Ma u64 start_blk, 47f56654c4STao Ma u32 new_clusters, 48f56654c4STao Ma u8 flags, 49f56654c4STao Ma struct ocfs2_alloc_context *meta_ac); 50f56654c4STao Ma int ocfs2_xattr_value_insert_extent(struct ocfs2_super *osb, 511fabe148SMark Fasheh handle_t *handle, 52ccd979bdSMark Fasheh struct inode *inode, 53e7d4cb6bSTao Ma struct buffer_head *root_bh, 54dcd0538fSMark Fasheh u32 cpos, 55dcd0538fSMark Fasheh u64 start_blk, 56ccd979bdSMark Fasheh u32 new_clusters, 572ae99a60SMark Fasheh u8 flags, 58e7d4cb6bSTao Ma struct ocfs2_alloc_context *meta_ac, 591a09f556SJoel Becker struct ocfs2_xattr_value_root *xv); 60ba492615STao Ma int ocfs2_xattr_tree_insert_extent(struct ocfs2_super *osb, 61ba492615STao Ma handle_t *handle, 62ba492615STao Ma struct inode *inode, 63ba492615STao Ma struct buffer_head *root_bh, 64ba492615STao Ma u32 cpos, 65ba492615STao Ma u64 start_blk, 66ba492615STao Ma u32 new_clusters, 67ba492615STao Ma u8 flags, 68ba492615STao Ma struct ocfs2_alloc_context *meta_ac); 690eb8d47eSTao Ma enum ocfs2_alloc_restarted { 700eb8d47eSTao Ma RESTART_NONE = 0, 710eb8d47eSTao Ma RESTART_TRANS, 720eb8d47eSTao Ma RESTART_META 730eb8d47eSTao Ma }; 740eb8d47eSTao Ma int ocfs2_add_clusters_in_btree(struct ocfs2_super *osb, 750eb8d47eSTao Ma struct inode *inode, 760eb8d47eSTao Ma u32 *logical_offset, 770eb8d47eSTao Ma u32 clusters_to_add, 780eb8d47eSTao Ma int mark_unwritten, 790eb8d47eSTao Ma struct buffer_head *root_bh, 800eb8d47eSTao Ma struct ocfs2_extent_list *root_el, 810eb8d47eSTao Ma handle_t *handle, 820eb8d47eSTao Ma struct ocfs2_alloc_context *data_ac, 830eb8d47eSTao Ma struct ocfs2_alloc_context *meta_ac, 840eb8d47eSTao Ma enum ocfs2_alloc_restarted *reason_ret, 85f56654c4STao Ma enum ocfs2_extent_tree_type type, 86f56654c4STao Ma void *private); 87328d5752SMark Fasheh struct ocfs2_cached_dealloc_ctxt; 88e7d4cb6bSTao Ma int ocfs2_mark_extent_written(struct inode *inode, struct buffer_head *root_bh, 89328d5752SMark Fasheh handle_t *handle, u32 cpos, u32 len, u32 phys, 90328d5752SMark Fasheh struct ocfs2_alloc_context *meta_ac, 91e7d4cb6bSTao Ma struct ocfs2_cached_dealloc_ctxt *dealloc, 92f56654c4STao Ma enum ocfs2_extent_tree_type et_type, 93f56654c4STao Ma void *private); 94e7d4cb6bSTao Ma int ocfs2_remove_extent(struct inode *inode, struct buffer_head *root_bh, 95063c4561SMark Fasheh u32 cpos, u32 len, handle_t *handle, 96063c4561SMark Fasheh struct ocfs2_alloc_context *meta_ac, 97e7d4cb6bSTao Ma struct ocfs2_cached_dealloc_ctxt *dealloc, 98f56654c4STao Ma enum ocfs2_extent_tree_type et_type, 99f56654c4STao Ma void *private); 100ccd979bdSMark Fasheh int ocfs2_num_free_extents(struct ocfs2_super *osb, 101ccd979bdSMark Fasheh struct inode *inode, 102e7d4cb6bSTao Ma struct buffer_head *root_bh, 103f56654c4STao Ma enum ocfs2_extent_tree_type et_type, 104f56654c4STao Ma void *private); 105e7d4cb6bSTao Ma 106811f933dSTao Ma /* 107811f933dSTao Ma * how many new metadata chunks would an allocation need at maximum? 108811f933dSTao Ma * 109811f933dSTao Ma * Please note that the caller must make sure that root_el is the root 110811f933dSTao Ma * of extent tree. So for an inode, it should be &fe->id2.i_list. Otherwise 111811f933dSTao Ma * the result may be wrong. 112811f933dSTao Ma */ 113811f933dSTao Ma static inline int ocfs2_extend_meta_needed(struct ocfs2_extent_list *root_el) 114ccd979bdSMark Fasheh { 115ccd979bdSMark Fasheh /* 116ccd979bdSMark Fasheh * Rather than do all the work of determining how much we need 117ccd979bdSMark Fasheh * (involves a ton of reads and locks), just ask for the 118ccd979bdSMark Fasheh * maximal limit. That's a tree depth shift. So, one block for 119ccd979bdSMark Fasheh * level of the tree (current l_tree_depth), one block for the 120ccd979bdSMark Fasheh * new tree_depth==0 extent_block, and one block at the new 121ccd979bdSMark Fasheh * top-of-the tree. 122ccd979bdSMark Fasheh */ 123811f933dSTao Ma return le16_to_cpu(root_el->l_tree_depth) + 2; 124ccd979bdSMark Fasheh } 125ccd979bdSMark Fasheh 1265b6a3a2bSMark Fasheh void ocfs2_dinode_new_extent_list(struct inode *inode, struct ocfs2_dinode *di); 1271afc32b9SMark Fasheh void ocfs2_set_inode_data_inline(struct inode *inode, struct ocfs2_dinode *di); 1281afc32b9SMark Fasheh int ocfs2_convert_inline_data_to_extents(struct inode *inode, 1291afc32b9SMark Fasheh struct buffer_head *di_bh); 1301afc32b9SMark Fasheh 131ccd979bdSMark Fasheh int ocfs2_truncate_log_init(struct ocfs2_super *osb); 132ccd979bdSMark Fasheh void ocfs2_truncate_log_shutdown(struct ocfs2_super *osb); 133ccd979bdSMark Fasheh void ocfs2_schedule_truncate_log_flush(struct ocfs2_super *osb, 134ccd979bdSMark Fasheh int cancel); 135ccd979bdSMark Fasheh int ocfs2_flush_truncate_log(struct ocfs2_super *osb); 136ccd979bdSMark Fasheh int ocfs2_begin_truncate_log_recovery(struct ocfs2_super *osb, 137ccd979bdSMark Fasheh int slot_num, 138ccd979bdSMark Fasheh struct ocfs2_dinode **tl_copy); 139ccd979bdSMark Fasheh int ocfs2_complete_truncate_log_recovery(struct ocfs2_super *osb, 140ccd979bdSMark Fasheh struct ocfs2_dinode *tl_copy); 141063c4561SMark Fasheh int ocfs2_truncate_log_needs_flush(struct ocfs2_super *osb); 142063c4561SMark Fasheh int ocfs2_truncate_log_append(struct ocfs2_super *osb, 143063c4561SMark Fasheh handle_t *handle, 144063c4561SMark Fasheh u64 start_blk, 145063c4561SMark Fasheh unsigned int num_clusters); 146063c4561SMark Fasheh int __ocfs2_flush_truncate_log(struct ocfs2_super *osb); 147ccd979bdSMark Fasheh 1482b604351SMark Fasheh /* 1492b604351SMark Fasheh * Process local structure which describes the block unlinks done 1502b604351SMark Fasheh * during an operation. This is populated via 1512b604351SMark Fasheh * ocfs2_cache_block_dealloc(). 1522b604351SMark Fasheh * 1532b604351SMark Fasheh * ocfs2_run_deallocs() should be called after the potentially 1542b604351SMark Fasheh * de-allocating routines. No journal handles should be open, and most 1552b604351SMark Fasheh * locks should have been dropped. 1562b604351SMark Fasheh */ 1572b604351SMark Fasheh struct ocfs2_cached_dealloc_ctxt { 1582b604351SMark Fasheh struct ocfs2_per_slot_free_list *c_first_suballocator; 1592b604351SMark Fasheh }; 1602b604351SMark Fasheh static inline void ocfs2_init_dealloc_ctxt(struct ocfs2_cached_dealloc_ctxt *c) 1612b604351SMark Fasheh { 1622b604351SMark Fasheh c->c_first_suballocator = NULL; 1632b604351SMark Fasheh } 1642b604351SMark Fasheh int ocfs2_run_deallocs(struct ocfs2_super *osb, 1652b604351SMark Fasheh struct ocfs2_cached_dealloc_ctxt *ctxt); 1662b604351SMark Fasheh 167ccd979bdSMark Fasheh struct ocfs2_truncate_context { 16859a5e416SMark Fasheh struct ocfs2_cached_dealloc_ctxt tc_dealloc; 169ccd979bdSMark Fasheh int tc_ext_alloc_locked; /* is it cluster locked? */ 170ccd979bdSMark Fasheh /* these get destroyed once it's passed to ocfs2_commit_truncate. */ 171ccd979bdSMark Fasheh struct buffer_head *tc_last_eb_bh; 172ccd979bdSMark Fasheh }; 173ccd979bdSMark Fasheh 17435edec1dSMark Fasheh int ocfs2_zero_range_for_truncate(struct inode *inode, handle_t *handle, 17535edec1dSMark Fasheh u64 range_start, u64 range_end); 176ccd979bdSMark Fasheh int ocfs2_prepare_truncate(struct ocfs2_super *osb, 177ccd979bdSMark Fasheh struct inode *inode, 178ccd979bdSMark Fasheh struct buffer_head *fe_bh, 179ccd979bdSMark Fasheh struct ocfs2_truncate_context **tc); 180ccd979bdSMark Fasheh int ocfs2_commit_truncate(struct ocfs2_super *osb, 181ccd979bdSMark Fasheh struct inode *inode, 182ccd979bdSMark Fasheh struct buffer_head *fe_bh, 183ccd979bdSMark Fasheh struct ocfs2_truncate_context *tc); 1841afc32b9SMark Fasheh int ocfs2_truncate_inline(struct inode *inode, struct buffer_head *di_bh, 1851afc32b9SMark Fasheh unsigned int start, unsigned int end, int trunc); 186ccd979bdSMark Fasheh 187363041a5SMark Fasheh int ocfs2_find_leaf(struct inode *inode, struct ocfs2_extent_list *root_el, 188363041a5SMark Fasheh u32 cpos, struct buffer_head **leaf_bh); 189328d5752SMark Fasheh int ocfs2_search_extent_list(struct ocfs2_extent_list *el, u32 v_cluster); 190363041a5SMark Fasheh 191e48edee2SMark Fasheh /* 192e48edee2SMark Fasheh * Helper function to look at the # of clusters in an extent record. 193e48edee2SMark Fasheh */ 194e48edee2SMark Fasheh static inline unsigned int ocfs2_rec_clusters(struct ocfs2_extent_list *el, 195e48edee2SMark Fasheh struct ocfs2_extent_rec *rec) 196e48edee2SMark Fasheh { 197e48edee2SMark Fasheh /* 198e48edee2SMark Fasheh * Cluster count in extent records is slightly different 199e48edee2SMark Fasheh * between interior nodes and leaf nodes. This is to support 200e48edee2SMark Fasheh * unwritten extents which need a flags field in leaf node 201e48edee2SMark Fasheh * records, thus shrinking the available space for a clusters 202e48edee2SMark Fasheh * field. 203e48edee2SMark Fasheh */ 204e48edee2SMark Fasheh if (el->l_tree_depth) 205e48edee2SMark Fasheh return le32_to_cpu(rec->e_int_clusters); 206e48edee2SMark Fasheh else 207e48edee2SMark Fasheh return le16_to_cpu(rec->e_leaf_clusters); 208e48edee2SMark Fasheh } 209e48edee2SMark Fasheh 21000dc417fSMark Fasheh /* 21100dc417fSMark Fasheh * This is only valid for leaf nodes, which are the only ones that can 21200dc417fSMark Fasheh * have empty extents anyway. 21300dc417fSMark Fasheh */ 21400dc417fSMark Fasheh static inline int ocfs2_is_empty_extent(struct ocfs2_extent_rec *rec) 21500dc417fSMark Fasheh { 21600dc417fSMark Fasheh return !rec->e_leaf_clusters; 21700dc417fSMark Fasheh } 21800dc417fSMark Fasheh 219ccd979bdSMark Fasheh #endif /* OCFS2_ALLOC_H */ 220