1f2c870e3STao Ma /* -*- mode: c; c-basic-offset: 8; -*- 2f2c870e3STao Ma * vim: noexpandtab sw=8 ts=8 sts=0: 3f2c870e3STao Ma * 4f2c870e3STao Ma * refcounttree.c 5f2c870e3STao Ma * 6f2c870e3STao Ma * Copyright (C) 2009 Oracle. All rights reserved. 7f2c870e3STao Ma * 8f2c870e3STao Ma * This program is free software; you can redistribute it and/or 9f2c870e3STao Ma * modify it under the terms of the GNU General Public 10f2c870e3STao Ma * License version 2 as published by the Free Software Foundation. 11f2c870e3STao Ma * 12f2c870e3STao Ma * This program is distributed in the hope that it will be useful, 13f2c870e3STao Ma * but WITHOUT ANY WARRANTY; without even the implied warranty of 14f2c870e3STao Ma * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15f2c870e3STao Ma * General Public License for more details. 16f2c870e3STao Ma */ 17f2c870e3STao Ma 18e73a819dSTao Ma #include <linux/sort.h> 19f2c870e3STao Ma #define MLOG_MASK_PREFIX ML_REFCOUNT 20f2c870e3STao Ma #include <cluster/masklog.h> 21f2c870e3STao Ma #include "ocfs2.h" 22f2c870e3STao Ma #include "inode.h" 23f2c870e3STao Ma #include "alloc.h" 24f2c870e3STao Ma #include "suballoc.h" 25f2c870e3STao Ma #include "journal.h" 26f2c870e3STao Ma #include "uptodate.h" 27f2c870e3STao Ma #include "super.h" 28f2c870e3STao Ma #include "buffer_head_io.h" 29f2c870e3STao Ma #include "blockcheck.h" 30c732eb16STao Ma #include "refcounttree.h" 318bf396deSTao Ma #include "sysfile.h" 32374a263eSTao Ma #include "dlmglue.h" 33e73a819dSTao Ma #include "extent_map.h" 346f70fa51STao Ma #include "aops.h" 35492a8a33STao Ma #include "xattr.h" 3609bf27a0STao Ma #include "namei.h" 376f70fa51STao Ma 386f70fa51STao Ma #include <linux/bio.h> 396f70fa51STao Ma #include <linux/blkdev.h> 406f70fa51STao Ma #include <linux/gfp.h> 416f70fa51STao Ma #include <linux/slab.h> 426f70fa51STao Ma #include <linux/writeback.h> 436f70fa51STao Ma #include <linux/pagevec.h> 446f70fa51STao Ma #include <linux/swap.h> 456f70fa51STao Ma 466f70fa51STao Ma struct ocfs2_cow_context { 476f70fa51STao Ma struct inode *inode; 486f70fa51STao Ma u32 cow_start; 496f70fa51STao Ma u32 cow_len; 50913580b4STao Ma struct ocfs2_extent_tree data_et; 51913580b4STao Ma struct ocfs2_refcount_tree *ref_tree; 526f70fa51STao Ma struct buffer_head *ref_root_bh; 536f70fa51STao Ma struct ocfs2_alloc_context *meta_ac; 546f70fa51STao Ma struct ocfs2_alloc_context *data_ac; 556f70fa51STao Ma struct ocfs2_cached_dealloc_ctxt dealloc; 56492a8a33STao Ma void *cow_object; 57492a8a33STao Ma struct ocfs2_post_refcount *post_refcount; 58492a8a33STao Ma int extra_credits; 59913580b4STao Ma int (*get_clusters)(struct ocfs2_cow_context *context, 60913580b4STao Ma u32 v_cluster, u32 *p_cluster, 61913580b4STao Ma u32 *num_clusters, 62913580b4STao Ma unsigned int *extent_flags); 63913580b4STao Ma int (*cow_duplicate_clusters)(handle_t *handle, 64913580b4STao Ma struct ocfs2_cow_context *context, 65913580b4STao Ma u32 cpos, u32 old_cluster, 66913580b4STao Ma u32 new_cluster, u32 new_len); 676f70fa51STao Ma }; 68c732eb16STao Ma 69c732eb16STao Ma static inline struct ocfs2_refcount_tree * 70c732eb16STao Ma cache_info_to_refcount(struct ocfs2_caching_info *ci) 71c732eb16STao Ma { 72c732eb16STao Ma return container_of(ci, struct ocfs2_refcount_tree, rf_ci); 73c732eb16STao Ma } 74f2c870e3STao Ma 75f2c870e3STao Ma static int ocfs2_validate_refcount_block(struct super_block *sb, 76f2c870e3STao Ma struct buffer_head *bh) 77f2c870e3STao Ma { 78f2c870e3STao Ma int rc; 79f2c870e3STao Ma struct ocfs2_refcount_block *rb = 80f2c870e3STao Ma (struct ocfs2_refcount_block *)bh->b_data; 81f2c870e3STao Ma 82f2c870e3STao Ma mlog(0, "Validating refcount block %llu\n", 83f2c870e3STao Ma (unsigned long long)bh->b_blocknr); 84f2c870e3STao Ma 85f2c870e3STao Ma BUG_ON(!buffer_uptodate(bh)); 86f2c870e3STao Ma 87f2c870e3STao Ma /* 88f2c870e3STao Ma * If the ecc fails, we return the error but otherwise 89f2c870e3STao Ma * leave the filesystem running. We know any error is 90f2c870e3STao Ma * local to this block. 91f2c870e3STao Ma */ 92f2c870e3STao Ma rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &rb->rf_check); 93f2c870e3STao Ma if (rc) { 94f2c870e3STao Ma mlog(ML_ERROR, "Checksum failed for refcount block %llu\n", 95f2c870e3STao Ma (unsigned long long)bh->b_blocknr); 96f2c870e3STao Ma return rc; 97f2c870e3STao Ma } 98f2c870e3STao Ma 99f2c870e3STao Ma 100f2c870e3STao Ma if (!OCFS2_IS_VALID_REFCOUNT_BLOCK(rb)) { 101f2c870e3STao Ma ocfs2_error(sb, 102f2c870e3STao Ma "Refcount block #%llu has bad signature %.*s", 103f2c870e3STao Ma (unsigned long long)bh->b_blocknr, 7, 104f2c870e3STao Ma rb->rf_signature); 105f2c870e3STao Ma return -EINVAL; 106f2c870e3STao Ma } 107f2c870e3STao Ma 108f2c870e3STao Ma if (le64_to_cpu(rb->rf_blkno) != bh->b_blocknr) { 109f2c870e3STao Ma ocfs2_error(sb, 110f2c870e3STao Ma "Refcount block #%llu has an invalid rf_blkno " 111f2c870e3STao Ma "of %llu", 112f2c870e3STao Ma (unsigned long long)bh->b_blocknr, 113f2c870e3STao Ma (unsigned long long)le64_to_cpu(rb->rf_blkno)); 114f2c870e3STao Ma return -EINVAL; 115f2c870e3STao Ma } 116f2c870e3STao Ma 117f2c870e3STao Ma if (le32_to_cpu(rb->rf_fs_generation) != OCFS2_SB(sb)->fs_generation) { 118f2c870e3STao Ma ocfs2_error(sb, 119f2c870e3STao Ma "Refcount block #%llu has an invalid " 120f2c870e3STao Ma "rf_fs_generation of #%u", 121f2c870e3STao Ma (unsigned long long)bh->b_blocknr, 122f2c870e3STao Ma le32_to_cpu(rb->rf_fs_generation)); 123f2c870e3STao Ma return -EINVAL; 124f2c870e3STao Ma } 125f2c870e3STao Ma 126f2c870e3STao Ma return 0; 127f2c870e3STao Ma } 128f2c870e3STao Ma 129f2c870e3STao Ma static int ocfs2_read_refcount_block(struct ocfs2_caching_info *ci, 130f2c870e3STao Ma u64 rb_blkno, 131f2c870e3STao Ma struct buffer_head **bh) 132f2c870e3STao Ma { 133f2c870e3STao Ma int rc; 134f2c870e3STao Ma struct buffer_head *tmp = *bh; 135f2c870e3STao Ma 136f2c870e3STao Ma rc = ocfs2_read_block(ci, rb_blkno, &tmp, 137f2c870e3STao Ma ocfs2_validate_refcount_block); 138f2c870e3STao Ma 139f2c870e3STao Ma /* If ocfs2_read_block() got us a new bh, pass it up. */ 140f2c870e3STao Ma if (!rc && !*bh) 141f2c870e3STao Ma *bh = tmp; 142f2c870e3STao Ma 143f2c870e3STao Ma return rc; 144f2c870e3STao Ma } 145c732eb16STao Ma 146c732eb16STao Ma static u64 ocfs2_refcount_cache_owner(struct ocfs2_caching_info *ci) 147c732eb16STao Ma { 148c732eb16STao Ma struct ocfs2_refcount_tree *rf = cache_info_to_refcount(ci); 149c732eb16STao Ma 150c732eb16STao Ma return rf->rf_blkno; 151c732eb16STao Ma } 152c732eb16STao Ma 153c732eb16STao Ma static struct super_block * 154c732eb16STao Ma ocfs2_refcount_cache_get_super(struct ocfs2_caching_info *ci) 155c732eb16STao Ma { 156c732eb16STao Ma struct ocfs2_refcount_tree *rf = cache_info_to_refcount(ci); 157c732eb16STao Ma 158c732eb16STao Ma return rf->rf_sb; 159c732eb16STao Ma } 160c732eb16STao Ma 161c732eb16STao Ma static void ocfs2_refcount_cache_lock(struct ocfs2_caching_info *ci) 162c732eb16STao Ma { 163c732eb16STao Ma struct ocfs2_refcount_tree *rf = cache_info_to_refcount(ci); 164c732eb16STao Ma 165c732eb16STao Ma spin_lock(&rf->rf_lock); 166c732eb16STao Ma } 167c732eb16STao Ma 168c732eb16STao Ma static void ocfs2_refcount_cache_unlock(struct ocfs2_caching_info *ci) 169c732eb16STao Ma { 170c732eb16STao Ma struct ocfs2_refcount_tree *rf = cache_info_to_refcount(ci); 171c732eb16STao Ma 172c732eb16STao Ma spin_unlock(&rf->rf_lock); 173c732eb16STao Ma } 174c732eb16STao Ma 175c732eb16STao Ma static void ocfs2_refcount_cache_io_lock(struct ocfs2_caching_info *ci) 176c732eb16STao Ma { 177c732eb16STao Ma struct ocfs2_refcount_tree *rf = cache_info_to_refcount(ci); 178c732eb16STao Ma 179c732eb16STao Ma mutex_lock(&rf->rf_io_mutex); 180c732eb16STao Ma } 181c732eb16STao Ma 182c732eb16STao Ma static void ocfs2_refcount_cache_io_unlock(struct ocfs2_caching_info *ci) 183c732eb16STao Ma { 184c732eb16STao Ma struct ocfs2_refcount_tree *rf = cache_info_to_refcount(ci); 185c732eb16STao Ma 186c732eb16STao Ma mutex_unlock(&rf->rf_io_mutex); 187c732eb16STao Ma } 188c732eb16STao Ma 189c732eb16STao Ma static const struct ocfs2_caching_operations ocfs2_refcount_caching_ops = { 190c732eb16STao Ma .co_owner = ocfs2_refcount_cache_owner, 191c732eb16STao Ma .co_get_super = ocfs2_refcount_cache_get_super, 192c732eb16STao Ma .co_cache_lock = ocfs2_refcount_cache_lock, 193c732eb16STao Ma .co_cache_unlock = ocfs2_refcount_cache_unlock, 194c732eb16STao Ma .co_io_lock = ocfs2_refcount_cache_io_lock, 195c732eb16STao Ma .co_io_unlock = ocfs2_refcount_cache_io_unlock, 196c732eb16STao Ma }; 197374a263eSTao Ma 198374a263eSTao Ma static struct ocfs2_refcount_tree * 199374a263eSTao Ma ocfs2_find_refcount_tree(struct ocfs2_super *osb, u64 blkno) 200374a263eSTao Ma { 201374a263eSTao Ma struct rb_node *n = osb->osb_rf_lock_tree.rb_node; 202374a263eSTao Ma struct ocfs2_refcount_tree *tree = NULL; 203374a263eSTao Ma 204374a263eSTao Ma while (n) { 205374a263eSTao Ma tree = rb_entry(n, struct ocfs2_refcount_tree, rf_node); 206374a263eSTao Ma 207374a263eSTao Ma if (blkno < tree->rf_blkno) 208374a263eSTao Ma n = n->rb_left; 209374a263eSTao Ma else if (blkno > tree->rf_blkno) 210374a263eSTao Ma n = n->rb_right; 211374a263eSTao Ma else 212374a263eSTao Ma return tree; 213374a263eSTao Ma } 214374a263eSTao Ma 215374a263eSTao Ma return NULL; 216374a263eSTao Ma } 217374a263eSTao Ma 218374a263eSTao Ma /* osb_lock is already locked. */ 219374a263eSTao Ma static void ocfs2_insert_refcount_tree(struct ocfs2_super *osb, 220374a263eSTao Ma struct ocfs2_refcount_tree *new) 221374a263eSTao Ma { 222374a263eSTao Ma u64 rf_blkno = new->rf_blkno; 223374a263eSTao Ma struct rb_node *parent = NULL; 224374a263eSTao Ma struct rb_node **p = &osb->osb_rf_lock_tree.rb_node; 225374a263eSTao Ma struct ocfs2_refcount_tree *tmp; 226374a263eSTao Ma 227374a263eSTao Ma while (*p) { 228374a263eSTao Ma parent = *p; 229374a263eSTao Ma 230374a263eSTao Ma tmp = rb_entry(parent, struct ocfs2_refcount_tree, 231374a263eSTao Ma rf_node); 232374a263eSTao Ma 233374a263eSTao Ma if (rf_blkno < tmp->rf_blkno) 234374a263eSTao Ma p = &(*p)->rb_left; 235374a263eSTao Ma else if (rf_blkno > tmp->rf_blkno) 236374a263eSTao Ma p = &(*p)->rb_right; 237374a263eSTao Ma else { 238374a263eSTao Ma /* This should never happen! */ 239374a263eSTao Ma mlog(ML_ERROR, "Duplicate refcount block %llu found!\n", 240374a263eSTao Ma (unsigned long long)rf_blkno); 241374a263eSTao Ma BUG(); 242374a263eSTao Ma } 243374a263eSTao Ma } 244374a263eSTao Ma 245374a263eSTao Ma rb_link_node(&new->rf_node, parent, p); 246374a263eSTao Ma rb_insert_color(&new->rf_node, &osb->osb_rf_lock_tree); 247374a263eSTao Ma } 248374a263eSTao Ma 249374a263eSTao Ma static void ocfs2_free_refcount_tree(struct ocfs2_refcount_tree *tree) 250374a263eSTao Ma { 251374a263eSTao Ma ocfs2_metadata_cache_exit(&tree->rf_ci); 252374a263eSTao Ma ocfs2_simple_drop_lockres(OCFS2_SB(tree->rf_sb), &tree->rf_lockres); 253374a263eSTao Ma ocfs2_lock_res_free(&tree->rf_lockres); 254374a263eSTao Ma kfree(tree); 255374a263eSTao Ma } 256374a263eSTao Ma 257374a263eSTao Ma static inline void 258374a263eSTao Ma ocfs2_erase_refcount_tree_from_list_no_lock(struct ocfs2_super *osb, 259374a263eSTao Ma struct ocfs2_refcount_tree *tree) 260374a263eSTao Ma { 261374a263eSTao Ma rb_erase(&tree->rf_node, &osb->osb_rf_lock_tree); 262374a263eSTao Ma if (osb->osb_ref_tree_lru && osb->osb_ref_tree_lru == tree) 263374a263eSTao Ma osb->osb_ref_tree_lru = NULL; 264374a263eSTao Ma } 265374a263eSTao Ma 266374a263eSTao Ma static void ocfs2_erase_refcount_tree_from_list(struct ocfs2_super *osb, 267374a263eSTao Ma struct ocfs2_refcount_tree *tree) 268374a263eSTao Ma { 269374a263eSTao Ma spin_lock(&osb->osb_lock); 270374a263eSTao Ma ocfs2_erase_refcount_tree_from_list_no_lock(osb, tree); 271374a263eSTao Ma spin_unlock(&osb->osb_lock); 272374a263eSTao Ma } 273374a263eSTao Ma 274374a263eSTao Ma void ocfs2_kref_remove_refcount_tree(struct kref *kref) 275374a263eSTao Ma { 276374a263eSTao Ma struct ocfs2_refcount_tree *tree = 277374a263eSTao Ma container_of(kref, struct ocfs2_refcount_tree, rf_getcnt); 278374a263eSTao Ma 279374a263eSTao Ma ocfs2_free_refcount_tree(tree); 280374a263eSTao Ma } 281374a263eSTao Ma 282374a263eSTao Ma static inline void 283374a263eSTao Ma ocfs2_refcount_tree_get(struct ocfs2_refcount_tree *tree) 284374a263eSTao Ma { 285374a263eSTao Ma kref_get(&tree->rf_getcnt); 286374a263eSTao Ma } 287374a263eSTao Ma 288374a263eSTao Ma static inline void 289374a263eSTao Ma ocfs2_refcount_tree_put(struct ocfs2_refcount_tree *tree) 290374a263eSTao Ma { 291374a263eSTao Ma kref_put(&tree->rf_getcnt, ocfs2_kref_remove_refcount_tree); 292374a263eSTao Ma } 293374a263eSTao Ma 294374a263eSTao Ma static inline void ocfs2_init_refcount_tree_ci(struct ocfs2_refcount_tree *new, 295374a263eSTao Ma struct super_block *sb) 296374a263eSTao Ma { 297374a263eSTao Ma ocfs2_metadata_cache_init(&new->rf_ci, &ocfs2_refcount_caching_ops); 298374a263eSTao Ma mutex_init(&new->rf_io_mutex); 299374a263eSTao Ma new->rf_sb = sb; 300374a263eSTao Ma spin_lock_init(&new->rf_lock); 301374a263eSTao Ma } 302374a263eSTao Ma 303374a263eSTao Ma static inline void ocfs2_init_refcount_tree_lock(struct ocfs2_super *osb, 304374a263eSTao Ma struct ocfs2_refcount_tree *new, 305374a263eSTao Ma u64 rf_blkno, u32 generation) 306374a263eSTao Ma { 307374a263eSTao Ma init_rwsem(&new->rf_sem); 308374a263eSTao Ma ocfs2_refcount_lock_res_init(&new->rf_lockres, osb, 309374a263eSTao Ma rf_blkno, generation); 310374a263eSTao Ma } 311374a263eSTao Ma 3128bf396deSTao Ma static struct ocfs2_refcount_tree* 3138bf396deSTao Ma ocfs2_allocate_refcount_tree(struct ocfs2_super *osb, u64 rf_blkno) 3148bf396deSTao Ma { 3158bf396deSTao Ma struct ocfs2_refcount_tree *new; 3168bf396deSTao Ma 3178bf396deSTao Ma new = kzalloc(sizeof(struct ocfs2_refcount_tree), GFP_NOFS); 3188bf396deSTao Ma if (!new) 3198bf396deSTao Ma return NULL; 3208bf396deSTao Ma 3218bf396deSTao Ma new->rf_blkno = rf_blkno; 3228bf396deSTao Ma kref_init(&new->rf_getcnt); 3238bf396deSTao Ma ocfs2_init_refcount_tree_ci(new, osb->sb); 3248bf396deSTao Ma 3258bf396deSTao Ma return new; 3268bf396deSTao Ma } 3278bf396deSTao Ma 328374a263eSTao Ma static int ocfs2_get_refcount_tree(struct ocfs2_super *osb, u64 rf_blkno, 329374a263eSTao Ma struct ocfs2_refcount_tree **ret_tree) 330374a263eSTao Ma { 331374a263eSTao Ma int ret = 0; 332374a263eSTao Ma struct ocfs2_refcount_tree *tree, *new = NULL; 333374a263eSTao Ma struct buffer_head *ref_root_bh = NULL; 334374a263eSTao Ma struct ocfs2_refcount_block *ref_rb; 335374a263eSTao Ma 336374a263eSTao Ma spin_lock(&osb->osb_lock); 337374a263eSTao Ma if (osb->osb_ref_tree_lru && 338374a263eSTao Ma osb->osb_ref_tree_lru->rf_blkno == rf_blkno) 339374a263eSTao Ma tree = osb->osb_ref_tree_lru; 340374a263eSTao Ma else 341374a263eSTao Ma tree = ocfs2_find_refcount_tree(osb, rf_blkno); 342374a263eSTao Ma if (tree) 343374a263eSTao Ma goto out; 344374a263eSTao Ma 345374a263eSTao Ma spin_unlock(&osb->osb_lock); 346374a263eSTao Ma 3478bf396deSTao Ma new = ocfs2_allocate_refcount_tree(osb, rf_blkno); 348374a263eSTao Ma if (!new) { 349374a263eSTao Ma ret = -ENOMEM; 3508bf396deSTao Ma mlog_errno(ret); 351374a263eSTao Ma return ret; 352374a263eSTao Ma } 353374a263eSTao Ma /* 354374a263eSTao Ma * We need the generation to create the refcount tree lock and since 355374a263eSTao Ma * it isn't changed during the tree modification, we are safe here to 356374a263eSTao Ma * read without protection. 357374a263eSTao Ma * We also have to purge the cache after we create the lock since the 358374a263eSTao Ma * refcount block may have the stale data. It can only be trusted when 359374a263eSTao Ma * we hold the refcount lock. 360374a263eSTao Ma */ 361374a263eSTao Ma ret = ocfs2_read_refcount_block(&new->rf_ci, rf_blkno, &ref_root_bh); 362374a263eSTao Ma if (ret) { 363374a263eSTao Ma mlog_errno(ret); 364374a263eSTao Ma ocfs2_metadata_cache_exit(&new->rf_ci); 365374a263eSTao Ma kfree(new); 366374a263eSTao Ma return ret; 367374a263eSTao Ma } 368374a263eSTao Ma 369374a263eSTao Ma ref_rb = (struct ocfs2_refcount_block *)ref_root_bh->b_data; 370374a263eSTao Ma new->rf_generation = le32_to_cpu(ref_rb->rf_generation); 371374a263eSTao Ma ocfs2_init_refcount_tree_lock(osb, new, rf_blkno, 372374a263eSTao Ma new->rf_generation); 373374a263eSTao Ma ocfs2_metadata_cache_purge(&new->rf_ci); 374374a263eSTao Ma 375374a263eSTao Ma spin_lock(&osb->osb_lock); 376374a263eSTao Ma tree = ocfs2_find_refcount_tree(osb, rf_blkno); 377374a263eSTao Ma if (tree) 378374a263eSTao Ma goto out; 379374a263eSTao Ma 380374a263eSTao Ma ocfs2_insert_refcount_tree(osb, new); 381374a263eSTao Ma 382374a263eSTao Ma tree = new; 383374a263eSTao Ma new = NULL; 384374a263eSTao Ma 385374a263eSTao Ma out: 386374a263eSTao Ma *ret_tree = tree; 387374a263eSTao Ma 388374a263eSTao Ma osb->osb_ref_tree_lru = tree; 389374a263eSTao Ma 390374a263eSTao Ma spin_unlock(&osb->osb_lock); 391374a263eSTao Ma 392374a263eSTao Ma if (new) 393374a263eSTao Ma ocfs2_free_refcount_tree(new); 394374a263eSTao Ma 395374a263eSTao Ma brelse(ref_root_bh); 396374a263eSTao Ma return ret; 397374a263eSTao Ma } 398374a263eSTao Ma 399374a263eSTao Ma static int ocfs2_get_refcount_block(struct inode *inode, u64 *ref_blkno) 400374a263eSTao Ma { 401374a263eSTao Ma int ret; 402374a263eSTao Ma struct buffer_head *di_bh = NULL; 403374a263eSTao Ma struct ocfs2_dinode *di; 404374a263eSTao Ma 405374a263eSTao Ma ret = ocfs2_read_inode_block(inode, &di_bh); 406374a263eSTao Ma if (ret) { 407374a263eSTao Ma mlog_errno(ret); 408374a263eSTao Ma goto out; 409374a263eSTao Ma } 410374a263eSTao Ma 411374a263eSTao Ma BUG_ON(!(OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL)); 412374a263eSTao Ma 413374a263eSTao Ma di = (struct ocfs2_dinode *)di_bh->b_data; 414374a263eSTao Ma *ref_blkno = le64_to_cpu(di->i_refcount_loc); 415374a263eSTao Ma brelse(di_bh); 416374a263eSTao Ma out: 417374a263eSTao Ma return ret; 418374a263eSTao Ma } 419374a263eSTao Ma 420374a263eSTao Ma static int __ocfs2_lock_refcount_tree(struct ocfs2_super *osb, 421374a263eSTao Ma struct ocfs2_refcount_tree *tree, int rw) 422374a263eSTao Ma { 423374a263eSTao Ma int ret; 424374a263eSTao Ma 425374a263eSTao Ma ret = ocfs2_refcount_lock(tree, rw); 426374a263eSTao Ma if (ret) { 427374a263eSTao Ma mlog_errno(ret); 428374a263eSTao Ma goto out; 429374a263eSTao Ma } 430374a263eSTao Ma 431374a263eSTao Ma if (rw) 432374a263eSTao Ma down_write(&tree->rf_sem); 433374a263eSTao Ma else 434374a263eSTao Ma down_read(&tree->rf_sem); 435374a263eSTao Ma 436374a263eSTao Ma out: 437374a263eSTao Ma return ret; 438374a263eSTao Ma } 439374a263eSTao Ma 440374a263eSTao Ma /* 441374a263eSTao Ma * Lock the refcount tree pointed by ref_blkno and return the tree. 442374a263eSTao Ma * In most case, we lock the tree and read the refcount block. 443374a263eSTao Ma * So read it here if the caller really needs it. 444374a263eSTao Ma * 445374a263eSTao Ma * If the tree has been re-created by other node, it will free the 446374a263eSTao Ma * old one and re-create it. 447374a263eSTao Ma */ 448374a263eSTao Ma int ocfs2_lock_refcount_tree(struct ocfs2_super *osb, 449374a263eSTao Ma u64 ref_blkno, int rw, 450374a263eSTao Ma struct ocfs2_refcount_tree **ret_tree, 451374a263eSTao Ma struct buffer_head **ref_bh) 452374a263eSTao Ma { 453374a263eSTao Ma int ret, delete_tree = 0; 454374a263eSTao Ma struct ocfs2_refcount_tree *tree = NULL; 455374a263eSTao Ma struct buffer_head *ref_root_bh = NULL; 456374a263eSTao Ma struct ocfs2_refcount_block *rb; 457374a263eSTao Ma 458374a263eSTao Ma again: 459374a263eSTao Ma ret = ocfs2_get_refcount_tree(osb, ref_blkno, &tree); 460374a263eSTao Ma if (ret) { 461374a263eSTao Ma mlog_errno(ret); 462374a263eSTao Ma return ret; 463374a263eSTao Ma } 464374a263eSTao Ma 465374a263eSTao Ma ocfs2_refcount_tree_get(tree); 466374a263eSTao Ma 467374a263eSTao Ma ret = __ocfs2_lock_refcount_tree(osb, tree, rw); 468374a263eSTao Ma if (ret) { 469374a263eSTao Ma mlog_errno(ret); 470374a263eSTao Ma ocfs2_refcount_tree_put(tree); 471374a263eSTao Ma goto out; 472374a263eSTao Ma } 473374a263eSTao Ma 474374a263eSTao Ma ret = ocfs2_read_refcount_block(&tree->rf_ci, tree->rf_blkno, 475374a263eSTao Ma &ref_root_bh); 476374a263eSTao Ma if (ret) { 477374a263eSTao Ma mlog_errno(ret); 478374a263eSTao Ma ocfs2_unlock_refcount_tree(osb, tree, rw); 479374a263eSTao Ma ocfs2_refcount_tree_put(tree); 480374a263eSTao Ma goto out; 481374a263eSTao Ma } 482374a263eSTao Ma 483374a263eSTao Ma rb = (struct ocfs2_refcount_block *)ref_root_bh->b_data; 484374a263eSTao Ma /* 485374a263eSTao Ma * If the refcount block has been freed and re-created, we may need 486374a263eSTao Ma * to recreate the refcount tree also. 487374a263eSTao Ma * 488374a263eSTao Ma * Here we just remove the tree from the rb-tree, and the last 489374a263eSTao Ma * kref holder will unlock and delete this refcount_tree. 490374a263eSTao Ma * Then we goto "again" and ocfs2_get_refcount_tree will create 491374a263eSTao Ma * the new refcount tree for us. 492374a263eSTao Ma */ 493374a263eSTao Ma if (tree->rf_generation != le32_to_cpu(rb->rf_generation)) { 494374a263eSTao Ma if (!tree->rf_removed) { 495374a263eSTao Ma ocfs2_erase_refcount_tree_from_list(osb, tree); 496374a263eSTao Ma tree->rf_removed = 1; 497374a263eSTao Ma delete_tree = 1; 498374a263eSTao Ma } 499374a263eSTao Ma 500374a263eSTao Ma ocfs2_unlock_refcount_tree(osb, tree, rw); 501374a263eSTao Ma /* 502374a263eSTao Ma * We get an extra reference when we create the refcount 503374a263eSTao Ma * tree, so another put will destroy it. 504374a263eSTao Ma */ 505374a263eSTao Ma if (delete_tree) 506374a263eSTao Ma ocfs2_refcount_tree_put(tree); 507374a263eSTao Ma brelse(ref_root_bh); 508374a263eSTao Ma ref_root_bh = NULL; 509374a263eSTao Ma goto again; 510374a263eSTao Ma } 511374a263eSTao Ma 512374a263eSTao Ma *ret_tree = tree; 513374a263eSTao Ma if (ref_bh) { 514374a263eSTao Ma *ref_bh = ref_root_bh; 515374a263eSTao Ma ref_root_bh = NULL; 516374a263eSTao Ma } 517374a263eSTao Ma out: 518374a263eSTao Ma brelse(ref_root_bh); 519374a263eSTao Ma return ret; 520374a263eSTao Ma } 521374a263eSTao Ma 522374a263eSTao Ma int ocfs2_lock_refcount_tree_by_inode(struct inode *inode, int rw, 523374a263eSTao Ma struct ocfs2_refcount_tree **ret_tree, 524374a263eSTao Ma struct buffer_head **ref_bh) 525374a263eSTao Ma { 526374a263eSTao Ma int ret; 527374a263eSTao Ma u64 ref_blkno; 528374a263eSTao Ma 529374a263eSTao Ma ret = ocfs2_get_refcount_block(inode, &ref_blkno); 530374a263eSTao Ma if (ret) { 531374a263eSTao Ma mlog_errno(ret); 532374a263eSTao Ma return ret; 533374a263eSTao Ma } 534374a263eSTao Ma 535374a263eSTao Ma return ocfs2_lock_refcount_tree(OCFS2_SB(inode->i_sb), ref_blkno, 536374a263eSTao Ma rw, ret_tree, ref_bh); 537374a263eSTao Ma } 538374a263eSTao Ma 539374a263eSTao Ma void ocfs2_unlock_refcount_tree(struct ocfs2_super *osb, 540374a263eSTao Ma struct ocfs2_refcount_tree *tree, int rw) 541374a263eSTao Ma { 542374a263eSTao Ma if (rw) 543374a263eSTao Ma up_write(&tree->rf_sem); 544374a263eSTao Ma else 545374a263eSTao Ma up_read(&tree->rf_sem); 546374a263eSTao Ma 547374a263eSTao Ma ocfs2_refcount_unlock(tree, rw); 548374a263eSTao Ma ocfs2_refcount_tree_put(tree); 549374a263eSTao Ma } 550374a263eSTao Ma 551374a263eSTao Ma void ocfs2_purge_refcount_trees(struct ocfs2_super *osb) 552374a263eSTao Ma { 553374a263eSTao Ma struct rb_node *node; 554374a263eSTao Ma struct ocfs2_refcount_tree *tree; 555374a263eSTao Ma struct rb_root *root = &osb->osb_rf_lock_tree; 556374a263eSTao Ma 557374a263eSTao Ma while ((node = rb_last(root)) != NULL) { 558374a263eSTao Ma tree = rb_entry(node, struct ocfs2_refcount_tree, rf_node); 559374a263eSTao Ma 560374a263eSTao Ma mlog(0, "Purge tree %llu\n", 561374a263eSTao Ma (unsigned long long) tree->rf_blkno); 562374a263eSTao Ma 563374a263eSTao Ma rb_erase(&tree->rf_node, root); 564374a263eSTao Ma ocfs2_free_refcount_tree(tree); 565374a263eSTao Ma } 566374a263eSTao Ma } 5678bf396deSTao Ma 5688bf396deSTao Ma /* 5698bf396deSTao Ma * Create a refcount tree for an inode. 5708bf396deSTao Ma * We take for granted that the inode is already locked. 5718bf396deSTao Ma */ 5728bf396deSTao Ma static int ocfs2_create_refcount_tree(struct inode *inode, 5738bf396deSTao Ma struct buffer_head *di_bh) 5748bf396deSTao Ma { 5758bf396deSTao Ma int ret; 5768bf396deSTao Ma handle_t *handle = NULL; 5778bf396deSTao Ma struct ocfs2_alloc_context *meta_ac = NULL; 5788bf396deSTao Ma struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; 5798bf396deSTao Ma struct ocfs2_inode_info *oi = OCFS2_I(inode); 5808bf396deSTao Ma struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); 5818bf396deSTao Ma struct buffer_head *new_bh = NULL; 5828bf396deSTao Ma struct ocfs2_refcount_block *rb; 5838bf396deSTao Ma struct ocfs2_refcount_tree *new_tree = NULL, *tree = NULL; 5848bf396deSTao Ma u16 suballoc_bit_start; 5858bf396deSTao Ma u32 num_got; 5868bf396deSTao Ma u64 first_blkno; 5878bf396deSTao Ma 5888bf396deSTao Ma BUG_ON(oi->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL); 5898bf396deSTao Ma 5908bf396deSTao Ma mlog(0, "create tree for inode %lu\n", inode->i_ino); 5918bf396deSTao Ma 5928bf396deSTao Ma ret = ocfs2_reserve_new_metadata_blocks(osb, 1, &meta_ac); 5938bf396deSTao Ma if (ret) { 5948bf396deSTao Ma mlog_errno(ret); 5958bf396deSTao Ma goto out; 5968bf396deSTao Ma } 5978bf396deSTao Ma 5988bf396deSTao Ma handle = ocfs2_start_trans(osb, OCFS2_REFCOUNT_TREE_CREATE_CREDITS); 5998bf396deSTao Ma if (IS_ERR(handle)) { 6008bf396deSTao Ma ret = PTR_ERR(handle); 6018bf396deSTao Ma mlog_errno(ret); 6028bf396deSTao Ma goto out; 6038bf396deSTao Ma } 6048bf396deSTao Ma 6058bf396deSTao Ma ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh, 6068bf396deSTao Ma OCFS2_JOURNAL_ACCESS_WRITE); 6078bf396deSTao Ma if (ret) { 6088bf396deSTao Ma mlog_errno(ret); 6098bf396deSTao Ma goto out_commit; 6108bf396deSTao Ma } 6118bf396deSTao Ma 6128bf396deSTao Ma ret = ocfs2_claim_metadata(osb, handle, meta_ac, 1, 6138bf396deSTao Ma &suballoc_bit_start, &num_got, 6148bf396deSTao Ma &first_blkno); 6158bf396deSTao Ma if (ret) { 6168bf396deSTao Ma mlog_errno(ret); 6178bf396deSTao Ma goto out_commit; 6188bf396deSTao Ma } 6198bf396deSTao Ma 6208bf396deSTao Ma new_tree = ocfs2_allocate_refcount_tree(osb, first_blkno); 6218bf396deSTao Ma if (!new_tree) { 6228bf396deSTao Ma ret = -ENOMEM; 6238bf396deSTao Ma mlog_errno(ret); 6248bf396deSTao Ma goto out_commit; 6258bf396deSTao Ma } 6268bf396deSTao Ma 6278bf396deSTao Ma new_bh = sb_getblk(inode->i_sb, first_blkno); 6288bf396deSTao Ma ocfs2_set_new_buffer_uptodate(&new_tree->rf_ci, new_bh); 6298bf396deSTao Ma 6308bf396deSTao Ma ret = ocfs2_journal_access_rb(handle, &new_tree->rf_ci, new_bh, 6318bf396deSTao Ma OCFS2_JOURNAL_ACCESS_CREATE); 6328bf396deSTao Ma if (ret) { 6338bf396deSTao Ma mlog_errno(ret); 6348bf396deSTao Ma goto out_commit; 6358bf396deSTao Ma } 6368bf396deSTao Ma 6378bf396deSTao Ma /* Initialize ocfs2_refcount_block. */ 6388bf396deSTao Ma rb = (struct ocfs2_refcount_block *)new_bh->b_data; 6398bf396deSTao Ma memset(rb, 0, inode->i_sb->s_blocksize); 6408bf396deSTao Ma strcpy((void *)rb, OCFS2_REFCOUNT_BLOCK_SIGNATURE); 6418bf396deSTao Ma rb->rf_suballoc_slot = cpu_to_le16(osb->slot_num); 6428bf396deSTao Ma rb->rf_suballoc_bit = cpu_to_le16(suballoc_bit_start); 6438bf396deSTao Ma rb->rf_fs_generation = cpu_to_le32(osb->fs_generation); 6448bf396deSTao Ma rb->rf_blkno = cpu_to_le64(first_blkno); 6458bf396deSTao Ma rb->rf_count = cpu_to_le32(1); 6468bf396deSTao Ma rb->rf_records.rl_count = 6478bf396deSTao Ma cpu_to_le16(ocfs2_refcount_recs_per_rb(osb->sb)); 6488bf396deSTao Ma spin_lock(&osb->osb_lock); 6498bf396deSTao Ma rb->rf_generation = osb->s_next_generation++; 6508bf396deSTao Ma spin_unlock(&osb->osb_lock); 6518bf396deSTao Ma 6528bf396deSTao Ma ocfs2_journal_dirty(handle, new_bh); 6538bf396deSTao Ma 6548bf396deSTao Ma spin_lock(&oi->ip_lock); 6558bf396deSTao Ma oi->ip_dyn_features |= OCFS2_HAS_REFCOUNT_FL; 6568bf396deSTao Ma di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); 6578bf396deSTao Ma di->i_refcount_loc = cpu_to_le64(first_blkno); 6588bf396deSTao Ma spin_unlock(&oi->ip_lock); 6598bf396deSTao Ma 6608bf396deSTao Ma mlog(0, "created tree for inode %lu, refblock %llu\n", 6618bf396deSTao Ma inode->i_ino, (unsigned long long)first_blkno); 6628bf396deSTao Ma 6638bf396deSTao Ma ocfs2_journal_dirty(handle, di_bh); 6648bf396deSTao Ma 6658bf396deSTao Ma /* 6668bf396deSTao Ma * We have to init the tree lock here since it will use 6678bf396deSTao Ma * the generation number to create it. 6688bf396deSTao Ma */ 6698bf396deSTao Ma new_tree->rf_generation = le32_to_cpu(rb->rf_generation); 6708bf396deSTao Ma ocfs2_init_refcount_tree_lock(osb, new_tree, first_blkno, 6718bf396deSTao Ma new_tree->rf_generation); 6728bf396deSTao Ma 6738bf396deSTao Ma spin_lock(&osb->osb_lock); 6748bf396deSTao Ma tree = ocfs2_find_refcount_tree(osb, first_blkno); 6758bf396deSTao Ma 6768bf396deSTao Ma /* 6778bf396deSTao Ma * We've just created a new refcount tree in this block. If 6788bf396deSTao Ma * we found a refcount tree on the ocfs2_super, it must be 6798bf396deSTao Ma * one we just deleted. We free the old tree before 6808bf396deSTao Ma * inserting the new tree. 6818bf396deSTao Ma */ 6828bf396deSTao Ma BUG_ON(tree && tree->rf_generation == new_tree->rf_generation); 6838bf396deSTao Ma if (tree) 6848bf396deSTao Ma ocfs2_erase_refcount_tree_from_list_no_lock(osb, tree); 6858bf396deSTao Ma ocfs2_insert_refcount_tree(osb, new_tree); 6868bf396deSTao Ma spin_unlock(&osb->osb_lock); 6878bf396deSTao Ma new_tree = NULL; 6888bf396deSTao Ma if (tree) 6898bf396deSTao Ma ocfs2_refcount_tree_put(tree); 6908bf396deSTao Ma 6918bf396deSTao Ma out_commit: 6928bf396deSTao Ma ocfs2_commit_trans(osb, handle); 6938bf396deSTao Ma 6948bf396deSTao Ma out: 6958bf396deSTao Ma if (new_tree) { 6968bf396deSTao Ma ocfs2_metadata_cache_exit(&new_tree->rf_ci); 6978bf396deSTao Ma kfree(new_tree); 6988bf396deSTao Ma } 6998bf396deSTao Ma 7008bf396deSTao Ma brelse(new_bh); 7018bf396deSTao Ma if (meta_ac) 7028bf396deSTao Ma ocfs2_free_alloc_context(meta_ac); 7038bf396deSTao Ma 7048bf396deSTao Ma return ret; 7058bf396deSTao Ma } 7068bf396deSTao Ma 7078bf396deSTao Ma static int ocfs2_set_refcount_tree(struct inode *inode, 7088bf396deSTao Ma struct buffer_head *di_bh, 7098bf396deSTao Ma u64 refcount_loc) 7108bf396deSTao Ma { 7118bf396deSTao Ma int ret; 7128bf396deSTao Ma handle_t *handle = NULL; 7138bf396deSTao Ma struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; 7148bf396deSTao Ma struct ocfs2_inode_info *oi = OCFS2_I(inode); 7158bf396deSTao Ma struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); 7168bf396deSTao Ma struct buffer_head *ref_root_bh = NULL; 7178bf396deSTao Ma struct ocfs2_refcount_block *rb; 7188bf396deSTao Ma struct ocfs2_refcount_tree *ref_tree; 7198bf396deSTao Ma 7208bf396deSTao Ma BUG_ON(oi->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL); 7218bf396deSTao Ma 7228bf396deSTao Ma ret = ocfs2_lock_refcount_tree(osb, refcount_loc, 1, 7238bf396deSTao Ma &ref_tree, &ref_root_bh); 7248bf396deSTao Ma if (ret) { 7258bf396deSTao Ma mlog_errno(ret); 7268bf396deSTao Ma return ret; 7278bf396deSTao Ma } 7288bf396deSTao Ma 7298bf396deSTao Ma handle = ocfs2_start_trans(osb, OCFS2_REFCOUNT_TREE_SET_CREDITS); 7308bf396deSTao Ma if (IS_ERR(handle)) { 7318bf396deSTao Ma ret = PTR_ERR(handle); 7328bf396deSTao Ma mlog_errno(ret); 7338bf396deSTao Ma goto out; 7348bf396deSTao Ma } 7358bf396deSTao Ma 7368bf396deSTao Ma ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh, 7378bf396deSTao Ma OCFS2_JOURNAL_ACCESS_WRITE); 7388bf396deSTao Ma if (ret) { 7398bf396deSTao Ma mlog_errno(ret); 7408bf396deSTao Ma goto out_commit; 7418bf396deSTao Ma } 7428bf396deSTao Ma 7438bf396deSTao Ma ret = ocfs2_journal_access_rb(handle, &ref_tree->rf_ci, ref_root_bh, 7448bf396deSTao Ma OCFS2_JOURNAL_ACCESS_WRITE); 7458bf396deSTao Ma if (ret) { 7468bf396deSTao Ma mlog_errno(ret); 7478bf396deSTao Ma goto out_commit; 7488bf396deSTao Ma } 7498bf396deSTao Ma 7508bf396deSTao Ma rb = (struct ocfs2_refcount_block *)ref_root_bh->b_data; 7518bf396deSTao Ma le32_add_cpu(&rb->rf_count, 1); 7528bf396deSTao Ma 7538bf396deSTao Ma ocfs2_journal_dirty(handle, ref_root_bh); 7548bf396deSTao Ma 7558bf396deSTao Ma spin_lock(&oi->ip_lock); 7568bf396deSTao Ma oi->ip_dyn_features |= OCFS2_HAS_REFCOUNT_FL; 7578bf396deSTao Ma di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); 7588bf396deSTao Ma di->i_refcount_loc = cpu_to_le64(refcount_loc); 7598bf396deSTao Ma spin_unlock(&oi->ip_lock); 7608bf396deSTao Ma ocfs2_journal_dirty(handle, di_bh); 7618bf396deSTao Ma 7628bf396deSTao Ma out_commit: 7638bf396deSTao Ma ocfs2_commit_trans(osb, handle); 7648bf396deSTao Ma out: 7658bf396deSTao Ma ocfs2_unlock_refcount_tree(osb, ref_tree, 1); 7668bf396deSTao Ma brelse(ref_root_bh); 7678bf396deSTao Ma 7688bf396deSTao Ma return ret; 7698bf396deSTao Ma } 7708bf396deSTao Ma 7718bf396deSTao Ma int ocfs2_remove_refcount_tree(struct inode *inode, struct buffer_head *di_bh) 7728bf396deSTao Ma { 7738bf396deSTao Ma int ret, delete_tree = 0; 7748bf396deSTao Ma handle_t *handle = NULL; 7758bf396deSTao Ma struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; 7768bf396deSTao Ma struct ocfs2_inode_info *oi = OCFS2_I(inode); 7778bf396deSTao Ma struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); 7788bf396deSTao Ma struct ocfs2_refcount_block *rb; 7798bf396deSTao Ma struct inode *alloc_inode = NULL; 7808bf396deSTao Ma struct buffer_head *alloc_bh = NULL; 7818bf396deSTao Ma struct buffer_head *blk_bh = NULL; 7828bf396deSTao Ma struct ocfs2_refcount_tree *ref_tree; 7838bf396deSTao Ma int credits = OCFS2_REFCOUNT_TREE_REMOVE_CREDITS; 7848bf396deSTao Ma u64 blk = 0, bg_blkno = 0, ref_blkno = le64_to_cpu(di->i_refcount_loc); 7858bf396deSTao Ma u16 bit = 0; 7868bf396deSTao Ma 7878bf396deSTao Ma if (!(oi->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL)) 7888bf396deSTao Ma return 0; 7898bf396deSTao Ma 7908bf396deSTao Ma BUG_ON(!ref_blkno); 7918bf396deSTao Ma ret = ocfs2_lock_refcount_tree(osb, ref_blkno, 1, &ref_tree, &blk_bh); 7928bf396deSTao Ma if (ret) { 7938bf396deSTao Ma mlog_errno(ret); 7948bf396deSTao Ma return ret; 7958bf396deSTao Ma } 7968bf396deSTao Ma 7978bf396deSTao Ma rb = (struct ocfs2_refcount_block *)blk_bh->b_data; 7988bf396deSTao Ma 7998bf396deSTao Ma /* 8008bf396deSTao Ma * If we are the last user, we need to free the block. 8018bf396deSTao Ma * So lock the allocator ahead. 8028bf396deSTao Ma */ 8038bf396deSTao Ma if (le32_to_cpu(rb->rf_count) == 1) { 8048bf396deSTao Ma blk = le64_to_cpu(rb->rf_blkno); 8058bf396deSTao Ma bit = le16_to_cpu(rb->rf_suballoc_bit); 8068bf396deSTao Ma bg_blkno = ocfs2_which_suballoc_group(blk, bit); 8078bf396deSTao Ma 8088bf396deSTao Ma alloc_inode = ocfs2_get_system_file_inode(osb, 8098bf396deSTao Ma EXTENT_ALLOC_SYSTEM_INODE, 8108bf396deSTao Ma le16_to_cpu(rb->rf_suballoc_slot)); 8118bf396deSTao Ma if (!alloc_inode) { 8128bf396deSTao Ma ret = -ENOMEM; 8138bf396deSTao Ma mlog_errno(ret); 8148bf396deSTao Ma goto out; 8158bf396deSTao Ma } 8168bf396deSTao Ma mutex_lock(&alloc_inode->i_mutex); 8178bf396deSTao Ma 8188bf396deSTao Ma ret = ocfs2_inode_lock(alloc_inode, &alloc_bh, 1); 8198bf396deSTao Ma if (ret) { 8208bf396deSTao Ma mlog_errno(ret); 8218bf396deSTao Ma goto out_mutex; 8228bf396deSTao Ma } 8238bf396deSTao Ma 8248bf396deSTao Ma credits += OCFS2_SUBALLOC_FREE; 8258bf396deSTao Ma } 8268bf396deSTao Ma 8278bf396deSTao Ma handle = ocfs2_start_trans(osb, credits); 8288bf396deSTao Ma if (IS_ERR(handle)) { 8298bf396deSTao Ma ret = PTR_ERR(handle); 8308bf396deSTao Ma mlog_errno(ret); 8318bf396deSTao Ma goto out_unlock; 8328bf396deSTao Ma } 8338bf396deSTao Ma 8348bf396deSTao Ma ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh, 8358bf396deSTao Ma OCFS2_JOURNAL_ACCESS_WRITE); 8368bf396deSTao Ma if (ret) { 8378bf396deSTao Ma mlog_errno(ret); 8388bf396deSTao Ma goto out_commit; 8398bf396deSTao Ma } 8408bf396deSTao Ma 8418bf396deSTao Ma ret = ocfs2_journal_access_rb(handle, &ref_tree->rf_ci, blk_bh, 8428bf396deSTao Ma OCFS2_JOURNAL_ACCESS_WRITE); 8438bf396deSTao Ma if (ret) { 8448bf396deSTao Ma mlog_errno(ret); 8458bf396deSTao Ma goto out_commit; 8468bf396deSTao Ma } 8478bf396deSTao Ma 8488bf396deSTao Ma spin_lock(&oi->ip_lock); 8498bf396deSTao Ma oi->ip_dyn_features &= ~OCFS2_HAS_REFCOUNT_FL; 8508bf396deSTao Ma di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); 8518bf396deSTao Ma di->i_refcount_loc = 0; 8528bf396deSTao Ma spin_unlock(&oi->ip_lock); 8538bf396deSTao Ma ocfs2_journal_dirty(handle, di_bh); 8548bf396deSTao Ma 8558bf396deSTao Ma le32_add_cpu(&rb->rf_count , -1); 8568bf396deSTao Ma ocfs2_journal_dirty(handle, blk_bh); 8578bf396deSTao Ma 8588bf396deSTao Ma if (!rb->rf_count) { 8598bf396deSTao Ma delete_tree = 1; 8608bf396deSTao Ma ocfs2_erase_refcount_tree_from_list(osb, ref_tree); 8618bf396deSTao Ma ret = ocfs2_free_suballoc_bits(handle, alloc_inode, 8628bf396deSTao Ma alloc_bh, bit, bg_blkno, 1); 8638bf396deSTao Ma if (ret) 8648bf396deSTao Ma mlog_errno(ret); 8658bf396deSTao Ma } 8668bf396deSTao Ma 8678bf396deSTao Ma out_commit: 8688bf396deSTao Ma ocfs2_commit_trans(osb, handle); 8698bf396deSTao Ma out_unlock: 8708bf396deSTao Ma if (alloc_inode) { 8718bf396deSTao Ma ocfs2_inode_unlock(alloc_inode, 1); 8728bf396deSTao Ma brelse(alloc_bh); 8738bf396deSTao Ma } 8748bf396deSTao Ma out_mutex: 8758bf396deSTao Ma if (alloc_inode) { 8768bf396deSTao Ma mutex_unlock(&alloc_inode->i_mutex); 8778bf396deSTao Ma iput(alloc_inode); 8788bf396deSTao Ma } 8798bf396deSTao Ma out: 8808bf396deSTao Ma ocfs2_unlock_refcount_tree(osb, ref_tree, 1); 8818bf396deSTao Ma if (delete_tree) 8828bf396deSTao Ma ocfs2_refcount_tree_put(ref_tree); 8838bf396deSTao Ma brelse(blk_bh); 8848bf396deSTao Ma 8858bf396deSTao Ma return ret; 8868bf396deSTao Ma } 887e73a819dSTao Ma 888e73a819dSTao Ma static void ocfs2_find_refcount_rec_in_rl(struct ocfs2_caching_info *ci, 889e73a819dSTao Ma struct buffer_head *ref_leaf_bh, 890e73a819dSTao Ma u64 cpos, unsigned int len, 891e73a819dSTao Ma struct ocfs2_refcount_rec *ret_rec, 892e73a819dSTao Ma int *index) 893e73a819dSTao Ma { 894e73a819dSTao Ma int i = 0; 895e73a819dSTao Ma struct ocfs2_refcount_block *rb = 896e73a819dSTao Ma (struct ocfs2_refcount_block *)ref_leaf_bh->b_data; 897e73a819dSTao Ma struct ocfs2_refcount_rec *rec = NULL; 898e73a819dSTao Ma 899e73a819dSTao Ma for (; i < le16_to_cpu(rb->rf_records.rl_used); i++) { 900e73a819dSTao Ma rec = &rb->rf_records.rl_recs[i]; 901e73a819dSTao Ma 902e73a819dSTao Ma if (le64_to_cpu(rec->r_cpos) + 903e73a819dSTao Ma le32_to_cpu(rec->r_clusters) <= cpos) 904e73a819dSTao Ma continue; 905e73a819dSTao Ma else if (le64_to_cpu(rec->r_cpos) > cpos) 906e73a819dSTao Ma break; 907e73a819dSTao Ma 908e73a819dSTao Ma /* ok, cpos fail in this rec. Just return. */ 909e73a819dSTao Ma if (ret_rec) 910e73a819dSTao Ma *ret_rec = *rec; 911e73a819dSTao Ma goto out; 912e73a819dSTao Ma } 913e73a819dSTao Ma 914e73a819dSTao Ma if (ret_rec) { 915e73a819dSTao Ma /* We meet with a hole here, so fake the rec. */ 916e73a819dSTao Ma ret_rec->r_cpos = cpu_to_le64(cpos); 917e73a819dSTao Ma ret_rec->r_refcount = 0; 918e73a819dSTao Ma if (i < le16_to_cpu(rb->rf_records.rl_used) && 919e73a819dSTao Ma le64_to_cpu(rec->r_cpos) < cpos + len) 920e73a819dSTao Ma ret_rec->r_clusters = 921e73a819dSTao Ma cpu_to_le32(le64_to_cpu(rec->r_cpos) - cpos); 922e73a819dSTao Ma else 923e73a819dSTao Ma ret_rec->r_clusters = cpu_to_le32(len); 924e73a819dSTao Ma } 925e73a819dSTao Ma 926e73a819dSTao Ma out: 927e73a819dSTao Ma *index = i; 928e73a819dSTao Ma } 929e73a819dSTao Ma 930e73a819dSTao Ma /* 9318b2c0dbaSTao Ma * Try to remove refcount tree. The mechanism is: 9328b2c0dbaSTao Ma * 1) Check whether i_clusters == 0, if no, exit. 9338b2c0dbaSTao Ma * 2) check whether we have i_xattr_loc in dinode. if yes, exit. 9348b2c0dbaSTao Ma * 3) Check whether we have inline xattr stored outside, if yes, exit. 9358b2c0dbaSTao Ma * 4) Remove the tree. 9368b2c0dbaSTao Ma */ 9378b2c0dbaSTao Ma int ocfs2_try_remove_refcount_tree(struct inode *inode, 9388b2c0dbaSTao Ma struct buffer_head *di_bh) 9398b2c0dbaSTao Ma { 9408b2c0dbaSTao Ma int ret; 9418b2c0dbaSTao Ma struct ocfs2_inode_info *oi = OCFS2_I(inode); 9428b2c0dbaSTao Ma struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; 9438b2c0dbaSTao Ma 9448b2c0dbaSTao Ma down_write(&oi->ip_xattr_sem); 9458b2c0dbaSTao Ma down_write(&oi->ip_alloc_sem); 9468b2c0dbaSTao Ma 9478b2c0dbaSTao Ma if (oi->ip_clusters) 9488b2c0dbaSTao Ma goto out; 9498b2c0dbaSTao Ma 9508b2c0dbaSTao Ma if ((oi->ip_dyn_features & OCFS2_HAS_XATTR_FL) && di->i_xattr_loc) 9518b2c0dbaSTao Ma goto out; 9528b2c0dbaSTao Ma 9538b2c0dbaSTao Ma if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL && 9548b2c0dbaSTao Ma ocfs2_has_inline_xattr_value_outside(inode, di)) 9558b2c0dbaSTao Ma goto out; 9568b2c0dbaSTao Ma 9578b2c0dbaSTao Ma ret = ocfs2_remove_refcount_tree(inode, di_bh); 9588b2c0dbaSTao Ma if (ret) 9598b2c0dbaSTao Ma mlog_errno(ret); 9608b2c0dbaSTao Ma out: 9618b2c0dbaSTao Ma up_write(&oi->ip_alloc_sem); 9628b2c0dbaSTao Ma up_write(&oi->ip_xattr_sem); 9638b2c0dbaSTao Ma return 0; 9648b2c0dbaSTao Ma } 9658b2c0dbaSTao Ma 9668b2c0dbaSTao Ma /* 967e73a819dSTao Ma * Given a cpos and len, try to find the refcount record which contains cpos. 968e73a819dSTao Ma * 1. If cpos can be found in one refcount record, return the record. 969e73a819dSTao Ma * 2. If cpos can't be found, return a fake record which start from cpos 970e73a819dSTao Ma * and end at a small value between cpos+len and start of the next record. 971e73a819dSTao Ma * This fake record has r_refcount = 0. 972e73a819dSTao Ma */ 973e73a819dSTao Ma static int ocfs2_get_refcount_rec(struct ocfs2_caching_info *ci, 974e73a819dSTao Ma struct buffer_head *ref_root_bh, 975e73a819dSTao Ma u64 cpos, unsigned int len, 976e73a819dSTao Ma struct ocfs2_refcount_rec *ret_rec, 977e73a819dSTao Ma int *index, 978e73a819dSTao Ma struct buffer_head **ret_bh) 979e73a819dSTao Ma { 980e73a819dSTao Ma int ret = 0, i, found; 981e73a819dSTao Ma u32 low_cpos; 982e73a819dSTao Ma struct ocfs2_extent_list *el; 983e73a819dSTao Ma struct ocfs2_extent_rec *tmp, *rec = NULL; 984e73a819dSTao Ma struct ocfs2_extent_block *eb; 985e73a819dSTao Ma struct buffer_head *eb_bh = NULL, *ref_leaf_bh = NULL; 986e73a819dSTao Ma struct super_block *sb = ocfs2_metadata_cache_get_super(ci); 987e73a819dSTao Ma struct ocfs2_refcount_block *rb = 988e73a819dSTao Ma (struct ocfs2_refcount_block *)ref_root_bh->b_data; 989e73a819dSTao Ma 990e73a819dSTao Ma if (!(le32_to_cpu(rb->rf_flags) & OCFS2_REFCOUNT_TREE_FL)) { 991e73a819dSTao Ma ocfs2_find_refcount_rec_in_rl(ci, ref_root_bh, cpos, len, 992e73a819dSTao Ma ret_rec, index); 993e73a819dSTao Ma *ret_bh = ref_root_bh; 994e73a819dSTao Ma get_bh(ref_root_bh); 995e73a819dSTao Ma return 0; 996e73a819dSTao Ma } 997e73a819dSTao Ma 998e73a819dSTao Ma el = &rb->rf_list; 999e73a819dSTao Ma low_cpos = cpos & OCFS2_32BIT_POS_MASK; 1000e73a819dSTao Ma 1001e73a819dSTao Ma if (el->l_tree_depth) { 1002e73a819dSTao Ma ret = ocfs2_find_leaf(ci, el, low_cpos, &eb_bh); 1003e73a819dSTao Ma if (ret) { 1004e73a819dSTao Ma mlog_errno(ret); 1005e73a819dSTao Ma goto out; 1006e73a819dSTao Ma } 1007e73a819dSTao Ma 1008e73a819dSTao Ma eb = (struct ocfs2_extent_block *) eb_bh->b_data; 1009e73a819dSTao Ma el = &eb->h_list; 1010e73a819dSTao Ma 1011e73a819dSTao Ma if (el->l_tree_depth) { 1012e73a819dSTao Ma ocfs2_error(sb, 1013e73a819dSTao Ma "refcount tree %llu has non zero tree " 1014e73a819dSTao Ma "depth in leaf btree tree block %llu\n", 1015e73a819dSTao Ma (unsigned long long)ocfs2_metadata_cache_owner(ci), 1016e73a819dSTao Ma (unsigned long long)eb_bh->b_blocknr); 1017e73a819dSTao Ma ret = -EROFS; 1018e73a819dSTao Ma goto out; 1019e73a819dSTao Ma } 1020e73a819dSTao Ma } 1021e73a819dSTao Ma 1022e73a819dSTao Ma found = 0; 1023e73a819dSTao Ma for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) { 1024e73a819dSTao Ma rec = &el->l_recs[i]; 1025e73a819dSTao Ma 1026e73a819dSTao Ma if (le32_to_cpu(rec->e_cpos) <= low_cpos) { 1027e73a819dSTao Ma found = 1; 1028e73a819dSTao Ma break; 1029e73a819dSTao Ma } 1030e73a819dSTao Ma } 1031e73a819dSTao Ma 1032e73a819dSTao Ma /* adjust len when we have ocfs2_extent_rec after it. */ 1033e73a819dSTao Ma if (found && i < le16_to_cpu(el->l_next_free_rec) - 1) { 1034e73a819dSTao Ma tmp = &el->l_recs[i+1]; 1035e73a819dSTao Ma 1036e73a819dSTao Ma if (le32_to_cpu(tmp->e_cpos) < cpos + len) 1037e73a819dSTao Ma len = le32_to_cpu(tmp->e_cpos) - cpos; 1038e73a819dSTao Ma } 1039e73a819dSTao Ma 1040e73a819dSTao Ma ret = ocfs2_read_refcount_block(ci, le64_to_cpu(rec->e_blkno), 1041e73a819dSTao Ma &ref_leaf_bh); 1042e73a819dSTao Ma if (ret) { 1043e73a819dSTao Ma mlog_errno(ret); 1044e73a819dSTao Ma goto out; 1045e73a819dSTao Ma } 1046e73a819dSTao Ma 1047e73a819dSTao Ma ocfs2_find_refcount_rec_in_rl(ci, ref_leaf_bh, cpos, len, 1048e73a819dSTao Ma ret_rec, index); 1049e73a819dSTao Ma *ret_bh = ref_leaf_bh; 1050e73a819dSTao Ma out: 1051e73a819dSTao Ma brelse(eb_bh); 1052e73a819dSTao Ma return ret; 1053e73a819dSTao Ma } 1054e73a819dSTao Ma 1055e73a819dSTao Ma enum ocfs2_ref_rec_contig { 1056e73a819dSTao Ma REF_CONTIG_NONE = 0, 1057e73a819dSTao Ma REF_CONTIG_LEFT, 1058e73a819dSTao Ma REF_CONTIG_RIGHT, 1059e73a819dSTao Ma REF_CONTIG_LEFTRIGHT, 1060e73a819dSTao Ma }; 1061e73a819dSTao Ma 1062e73a819dSTao Ma static enum ocfs2_ref_rec_contig 1063e73a819dSTao Ma ocfs2_refcount_rec_adjacent(struct ocfs2_refcount_block *rb, 1064e73a819dSTao Ma int index) 1065e73a819dSTao Ma { 1066e73a819dSTao Ma if ((rb->rf_records.rl_recs[index].r_refcount == 1067e73a819dSTao Ma rb->rf_records.rl_recs[index + 1].r_refcount) && 1068e73a819dSTao Ma (le64_to_cpu(rb->rf_records.rl_recs[index].r_cpos) + 1069e73a819dSTao Ma le32_to_cpu(rb->rf_records.rl_recs[index].r_clusters) == 1070e73a819dSTao Ma le64_to_cpu(rb->rf_records.rl_recs[index + 1].r_cpos))) 1071e73a819dSTao Ma return REF_CONTIG_RIGHT; 1072e73a819dSTao Ma 1073e73a819dSTao Ma return REF_CONTIG_NONE; 1074e73a819dSTao Ma } 1075e73a819dSTao Ma 1076e73a819dSTao Ma static enum ocfs2_ref_rec_contig 1077e73a819dSTao Ma ocfs2_refcount_rec_contig(struct ocfs2_refcount_block *rb, 1078e73a819dSTao Ma int index) 1079e73a819dSTao Ma { 1080e73a819dSTao Ma enum ocfs2_ref_rec_contig ret = REF_CONTIG_NONE; 1081e73a819dSTao Ma 1082e73a819dSTao Ma if (index < le16_to_cpu(rb->rf_records.rl_used) - 1) 1083e73a819dSTao Ma ret = ocfs2_refcount_rec_adjacent(rb, index); 1084e73a819dSTao Ma 1085e73a819dSTao Ma if (index > 0) { 1086e73a819dSTao Ma enum ocfs2_ref_rec_contig tmp; 1087e73a819dSTao Ma 1088e73a819dSTao Ma tmp = ocfs2_refcount_rec_adjacent(rb, index - 1); 1089e73a819dSTao Ma 1090e73a819dSTao Ma if (tmp == REF_CONTIG_RIGHT) { 1091e73a819dSTao Ma if (ret == REF_CONTIG_RIGHT) 1092e73a819dSTao Ma ret = REF_CONTIG_LEFTRIGHT; 1093e73a819dSTao Ma else 1094e73a819dSTao Ma ret = REF_CONTIG_LEFT; 1095e73a819dSTao Ma } 1096e73a819dSTao Ma } 1097e73a819dSTao Ma 1098e73a819dSTao Ma return ret; 1099e73a819dSTao Ma } 1100e73a819dSTao Ma 1101e73a819dSTao Ma static void ocfs2_rotate_refcount_rec_left(struct ocfs2_refcount_block *rb, 1102e73a819dSTao Ma int index) 1103e73a819dSTao Ma { 1104e73a819dSTao Ma BUG_ON(rb->rf_records.rl_recs[index].r_refcount != 1105e73a819dSTao Ma rb->rf_records.rl_recs[index+1].r_refcount); 1106e73a819dSTao Ma 1107e73a819dSTao Ma le32_add_cpu(&rb->rf_records.rl_recs[index].r_clusters, 1108e73a819dSTao Ma le32_to_cpu(rb->rf_records.rl_recs[index+1].r_clusters)); 1109e73a819dSTao Ma 1110e73a819dSTao Ma if (index < le16_to_cpu(rb->rf_records.rl_used) - 2) 1111e73a819dSTao Ma memmove(&rb->rf_records.rl_recs[index + 1], 1112e73a819dSTao Ma &rb->rf_records.rl_recs[index + 2], 1113e73a819dSTao Ma sizeof(struct ocfs2_refcount_rec) * 1114e73a819dSTao Ma (le16_to_cpu(rb->rf_records.rl_used) - index - 2)); 1115e73a819dSTao Ma 1116e73a819dSTao Ma memset(&rb->rf_records.rl_recs[le16_to_cpu(rb->rf_records.rl_used) - 1], 1117e73a819dSTao Ma 0, sizeof(struct ocfs2_refcount_rec)); 1118e73a819dSTao Ma le16_add_cpu(&rb->rf_records.rl_used, -1); 1119e73a819dSTao Ma } 1120e73a819dSTao Ma 1121e73a819dSTao Ma /* 1122e73a819dSTao Ma * Merge the refcount rec if we are contiguous with the adjacent recs. 1123e73a819dSTao Ma */ 1124e73a819dSTao Ma static void ocfs2_refcount_rec_merge(struct ocfs2_refcount_block *rb, 1125e73a819dSTao Ma int index) 1126e73a819dSTao Ma { 1127e73a819dSTao Ma enum ocfs2_ref_rec_contig contig = 1128e73a819dSTao Ma ocfs2_refcount_rec_contig(rb, index); 1129e73a819dSTao Ma 1130e73a819dSTao Ma if (contig == REF_CONTIG_NONE) 1131e73a819dSTao Ma return; 1132e73a819dSTao Ma 1133e73a819dSTao Ma if (contig == REF_CONTIG_LEFT || contig == REF_CONTIG_LEFTRIGHT) { 1134e73a819dSTao Ma BUG_ON(index == 0); 1135e73a819dSTao Ma index--; 1136e73a819dSTao Ma } 1137e73a819dSTao Ma 1138e73a819dSTao Ma ocfs2_rotate_refcount_rec_left(rb, index); 1139e73a819dSTao Ma 1140e73a819dSTao Ma if (contig == REF_CONTIG_LEFTRIGHT) 1141e73a819dSTao Ma ocfs2_rotate_refcount_rec_left(rb, index); 1142e73a819dSTao Ma } 1143e73a819dSTao Ma 11441823cb0bSTao Ma /* 11451823cb0bSTao Ma * Change the refcount indexed by "index" in ref_bh. 11461823cb0bSTao Ma * If refcount reaches 0, remove it. 11471823cb0bSTao Ma */ 1148e73a819dSTao Ma static int ocfs2_change_refcount_rec(handle_t *handle, 1149e73a819dSTao Ma struct ocfs2_caching_info *ci, 1150e73a819dSTao Ma struct buffer_head *ref_leaf_bh, 11517540c1a7STao Ma int index, int merge, int change) 1152e73a819dSTao Ma { 1153e73a819dSTao Ma int ret; 1154e73a819dSTao Ma struct ocfs2_refcount_block *rb = 1155e73a819dSTao Ma (struct ocfs2_refcount_block *)ref_leaf_bh->b_data; 11561823cb0bSTao Ma struct ocfs2_refcount_list *rl = &rb->rf_records; 11571823cb0bSTao Ma struct ocfs2_refcount_rec *rec = &rl->rl_recs[index]; 1158e73a819dSTao Ma 1159e73a819dSTao Ma ret = ocfs2_journal_access_rb(handle, ci, ref_leaf_bh, 1160e73a819dSTao Ma OCFS2_JOURNAL_ACCESS_WRITE); 1161e73a819dSTao Ma if (ret) { 1162e73a819dSTao Ma mlog_errno(ret); 1163e73a819dSTao Ma goto out; 1164e73a819dSTao Ma } 1165e73a819dSTao Ma 1166e73a819dSTao Ma mlog(0, "change index %d, old count %u, change %d\n", index, 1167e73a819dSTao Ma le32_to_cpu(rec->r_refcount), change); 1168e73a819dSTao Ma le32_add_cpu(&rec->r_refcount, change); 1169e73a819dSTao Ma 11701823cb0bSTao Ma if (!rec->r_refcount) { 11711823cb0bSTao Ma if (index != le16_to_cpu(rl->rl_used) - 1) { 11721823cb0bSTao Ma memmove(rec, rec + 1, 11731823cb0bSTao Ma (le16_to_cpu(rl->rl_used) - index - 1) * 11741823cb0bSTao Ma sizeof(struct ocfs2_refcount_rec)); 11751823cb0bSTao Ma memset(&rl->rl_recs[le16_to_cpu(rl->rl_used) - 1], 11761823cb0bSTao Ma 0, sizeof(struct ocfs2_refcount_rec)); 11771823cb0bSTao Ma } 11781823cb0bSTao Ma 11791823cb0bSTao Ma le16_add_cpu(&rl->rl_used, -1); 11807540c1a7STao Ma } else if (merge) 1181e73a819dSTao Ma ocfs2_refcount_rec_merge(rb, index); 1182e73a819dSTao Ma 1183e73a819dSTao Ma ret = ocfs2_journal_dirty(handle, ref_leaf_bh); 1184e73a819dSTao Ma if (ret) 1185e73a819dSTao Ma mlog_errno(ret); 1186e73a819dSTao Ma out: 1187e73a819dSTao Ma return ret; 1188e73a819dSTao Ma } 1189e73a819dSTao Ma 1190e73a819dSTao Ma static int ocfs2_expand_inline_ref_root(handle_t *handle, 1191e73a819dSTao Ma struct ocfs2_caching_info *ci, 1192e73a819dSTao Ma struct buffer_head *ref_root_bh, 1193e73a819dSTao Ma struct buffer_head **ref_leaf_bh, 1194e73a819dSTao Ma struct ocfs2_alloc_context *meta_ac) 1195e73a819dSTao Ma { 1196e73a819dSTao Ma int ret; 1197e73a819dSTao Ma u16 suballoc_bit_start; 1198e73a819dSTao Ma u32 num_got; 1199e73a819dSTao Ma u64 blkno; 1200e73a819dSTao Ma struct super_block *sb = ocfs2_metadata_cache_get_super(ci); 1201e73a819dSTao Ma struct buffer_head *new_bh = NULL; 1202e73a819dSTao Ma struct ocfs2_refcount_block *new_rb; 1203e73a819dSTao Ma struct ocfs2_refcount_block *root_rb = 1204e73a819dSTao Ma (struct ocfs2_refcount_block *)ref_root_bh->b_data; 1205e73a819dSTao Ma 1206e73a819dSTao Ma ret = ocfs2_journal_access_rb(handle, ci, ref_root_bh, 1207e73a819dSTao Ma OCFS2_JOURNAL_ACCESS_WRITE); 1208e73a819dSTao Ma if (ret) { 1209e73a819dSTao Ma mlog_errno(ret); 1210e73a819dSTao Ma goto out; 1211e73a819dSTao Ma } 1212e73a819dSTao Ma 1213e73a819dSTao Ma ret = ocfs2_claim_metadata(OCFS2_SB(sb), handle, meta_ac, 1, 1214e73a819dSTao Ma &suballoc_bit_start, &num_got, 1215e73a819dSTao Ma &blkno); 1216e73a819dSTao Ma if (ret) { 1217e73a819dSTao Ma mlog_errno(ret); 1218e73a819dSTao Ma goto out; 1219e73a819dSTao Ma } 1220e73a819dSTao Ma 1221e73a819dSTao Ma new_bh = sb_getblk(sb, blkno); 1222e73a819dSTao Ma if (new_bh == NULL) { 1223e73a819dSTao Ma ret = -EIO; 1224e73a819dSTao Ma mlog_errno(ret); 1225e73a819dSTao Ma goto out; 1226e73a819dSTao Ma } 1227e73a819dSTao Ma ocfs2_set_new_buffer_uptodate(ci, new_bh); 1228e73a819dSTao Ma 1229e73a819dSTao Ma ret = ocfs2_journal_access_rb(handle, ci, new_bh, 1230e73a819dSTao Ma OCFS2_JOURNAL_ACCESS_CREATE); 1231e73a819dSTao Ma if (ret) { 1232e73a819dSTao Ma mlog_errno(ret); 1233e73a819dSTao Ma goto out; 1234e73a819dSTao Ma } 1235e73a819dSTao Ma 1236e73a819dSTao Ma /* 1237e73a819dSTao Ma * Initialize ocfs2_refcount_block. 1238e73a819dSTao Ma * It should contain the same information as the old root. 1239e73a819dSTao Ma * so just memcpy it and change the corresponding field. 1240e73a819dSTao Ma */ 1241e73a819dSTao Ma memcpy(new_bh->b_data, ref_root_bh->b_data, sb->s_blocksize); 1242e73a819dSTao Ma 1243e73a819dSTao Ma new_rb = (struct ocfs2_refcount_block *)new_bh->b_data; 1244e73a819dSTao Ma new_rb->rf_suballoc_slot = cpu_to_le16(OCFS2_SB(sb)->slot_num); 1245e73a819dSTao Ma new_rb->rf_suballoc_bit = cpu_to_le16(suballoc_bit_start); 1246e73a819dSTao Ma new_rb->rf_blkno = cpu_to_le64(blkno); 1247e73a819dSTao Ma new_rb->rf_cpos = cpu_to_le32(0); 1248e73a819dSTao Ma new_rb->rf_parent = cpu_to_le64(ref_root_bh->b_blocknr); 1249e73a819dSTao Ma new_rb->rf_flags = cpu_to_le32(OCFS2_REFCOUNT_LEAF_FL); 1250e73a819dSTao Ma ocfs2_journal_dirty(handle, new_bh); 1251e73a819dSTao Ma 1252e73a819dSTao Ma /* Now change the root. */ 1253e73a819dSTao Ma memset(&root_rb->rf_list, 0, sb->s_blocksize - 1254e73a819dSTao Ma offsetof(struct ocfs2_refcount_block, rf_list)); 1255e73a819dSTao Ma root_rb->rf_list.l_count = cpu_to_le16(ocfs2_extent_recs_per_rb(sb)); 1256e73a819dSTao Ma root_rb->rf_clusters = cpu_to_le32(1); 1257e73a819dSTao Ma root_rb->rf_list.l_next_free_rec = cpu_to_le16(1); 1258e73a819dSTao Ma root_rb->rf_list.l_recs[0].e_blkno = cpu_to_le64(blkno); 1259e73a819dSTao Ma root_rb->rf_list.l_recs[0].e_leaf_clusters = cpu_to_le16(1); 1260e73a819dSTao Ma root_rb->rf_flags = cpu_to_le32(OCFS2_REFCOUNT_TREE_FL); 1261e73a819dSTao Ma 1262e73a819dSTao Ma ocfs2_journal_dirty(handle, ref_root_bh); 1263e73a819dSTao Ma 1264e73a819dSTao Ma mlog(0, "new leaf block %llu, used %u\n", (unsigned long long)blkno, 1265e73a819dSTao Ma le16_to_cpu(new_rb->rf_records.rl_used)); 1266e73a819dSTao Ma 1267e73a819dSTao Ma *ref_leaf_bh = new_bh; 1268e73a819dSTao Ma new_bh = NULL; 1269e73a819dSTao Ma out: 1270e73a819dSTao Ma brelse(new_bh); 1271e73a819dSTao Ma return ret; 1272e73a819dSTao Ma } 1273e73a819dSTao Ma 1274e73a819dSTao Ma static int ocfs2_refcount_rec_no_intersect(struct ocfs2_refcount_rec *prev, 1275e73a819dSTao Ma struct ocfs2_refcount_rec *next) 1276e73a819dSTao Ma { 1277e73a819dSTao Ma if (ocfs2_get_ref_rec_low_cpos(prev) + le32_to_cpu(prev->r_clusters) <= 1278e73a819dSTao Ma ocfs2_get_ref_rec_low_cpos(next)) 1279e73a819dSTao Ma return 1; 1280e73a819dSTao Ma 1281e73a819dSTao Ma return 0; 1282e73a819dSTao Ma } 1283e73a819dSTao Ma 1284e73a819dSTao Ma static int cmp_refcount_rec_by_low_cpos(const void *a, const void *b) 1285e73a819dSTao Ma { 1286e73a819dSTao Ma const struct ocfs2_refcount_rec *l = a, *r = b; 1287e73a819dSTao Ma u32 l_cpos = ocfs2_get_ref_rec_low_cpos(l); 1288e73a819dSTao Ma u32 r_cpos = ocfs2_get_ref_rec_low_cpos(r); 1289e73a819dSTao Ma 1290e73a819dSTao Ma if (l_cpos > r_cpos) 1291e73a819dSTao Ma return 1; 1292e73a819dSTao Ma if (l_cpos < r_cpos) 1293e73a819dSTao Ma return -1; 1294e73a819dSTao Ma return 0; 1295e73a819dSTao Ma } 1296e73a819dSTao Ma 1297e73a819dSTao Ma static int cmp_refcount_rec_by_cpos(const void *a, const void *b) 1298e73a819dSTao Ma { 1299e73a819dSTao Ma const struct ocfs2_refcount_rec *l = a, *r = b; 1300e73a819dSTao Ma u64 l_cpos = le64_to_cpu(l->r_cpos); 1301e73a819dSTao Ma u64 r_cpos = le64_to_cpu(r->r_cpos); 1302e73a819dSTao Ma 1303e73a819dSTao Ma if (l_cpos > r_cpos) 1304e73a819dSTao Ma return 1; 1305e73a819dSTao Ma if (l_cpos < r_cpos) 1306e73a819dSTao Ma return -1; 1307e73a819dSTao Ma return 0; 1308e73a819dSTao Ma } 1309e73a819dSTao Ma 1310e73a819dSTao Ma static void swap_refcount_rec(void *a, void *b, int size) 1311e73a819dSTao Ma { 1312e73a819dSTao Ma struct ocfs2_refcount_rec *l = a, *r = b, tmp; 1313e73a819dSTao Ma 1314e73a819dSTao Ma tmp = *(struct ocfs2_refcount_rec *)l; 1315e73a819dSTao Ma *(struct ocfs2_refcount_rec *)l = 1316e73a819dSTao Ma *(struct ocfs2_refcount_rec *)r; 1317e73a819dSTao Ma *(struct ocfs2_refcount_rec *)r = tmp; 1318e73a819dSTao Ma } 1319e73a819dSTao Ma 1320e73a819dSTao Ma /* 1321e73a819dSTao Ma * The refcount cpos are ordered by their 64bit cpos, 1322e73a819dSTao Ma * But we will use the low 32 bit to be the e_cpos in the b-tree. 1323e73a819dSTao Ma * So we need to make sure that this pos isn't intersected with others. 1324e73a819dSTao Ma * 1325e73a819dSTao Ma * Note: The refcount block is already sorted by their low 32 bit cpos, 1326e73a819dSTao Ma * So just try the middle pos first, and we will exit when we find 1327e73a819dSTao Ma * the good position. 1328e73a819dSTao Ma */ 1329e73a819dSTao Ma static int ocfs2_find_refcount_split_pos(struct ocfs2_refcount_list *rl, 1330e73a819dSTao Ma u32 *split_pos, int *split_index) 1331e73a819dSTao Ma { 1332e73a819dSTao Ma int num_used = le16_to_cpu(rl->rl_used); 1333e73a819dSTao Ma int delta, middle = num_used / 2; 1334e73a819dSTao Ma 1335e73a819dSTao Ma for (delta = 0; delta < middle; delta++) { 1336e73a819dSTao Ma /* Let's check delta earlier than middle */ 1337e73a819dSTao Ma if (ocfs2_refcount_rec_no_intersect( 1338e73a819dSTao Ma &rl->rl_recs[middle - delta - 1], 1339e73a819dSTao Ma &rl->rl_recs[middle - delta])) { 1340e73a819dSTao Ma *split_index = middle - delta; 1341e73a819dSTao Ma break; 1342e73a819dSTao Ma } 1343e73a819dSTao Ma 1344e73a819dSTao Ma /* For even counts, don't walk off the end */ 1345e73a819dSTao Ma if ((middle + delta + 1) == num_used) 1346e73a819dSTao Ma continue; 1347e73a819dSTao Ma 1348e73a819dSTao Ma /* Now try delta past middle */ 1349e73a819dSTao Ma if (ocfs2_refcount_rec_no_intersect( 1350e73a819dSTao Ma &rl->rl_recs[middle + delta], 1351e73a819dSTao Ma &rl->rl_recs[middle + delta + 1])) { 1352e73a819dSTao Ma *split_index = middle + delta + 1; 1353e73a819dSTao Ma break; 1354e73a819dSTao Ma } 1355e73a819dSTao Ma } 1356e73a819dSTao Ma 1357e73a819dSTao Ma if (delta >= middle) 1358e73a819dSTao Ma return -ENOSPC; 1359e73a819dSTao Ma 1360e73a819dSTao Ma *split_pos = ocfs2_get_ref_rec_low_cpos(&rl->rl_recs[*split_index]); 1361e73a819dSTao Ma return 0; 1362e73a819dSTao Ma } 1363e73a819dSTao Ma 1364e73a819dSTao Ma static int ocfs2_divide_leaf_refcount_block(struct buffer_head *ref_leaf_bh, 1365e73a819dSTao Ma struct buffer_head *new_bh, 1366e73a819dSTao Ma u32 *split_cpos) 1367e73a819dSTao Ma { 1368e73a819dSTao Ma int split_index = 0, num_moved, ret; 1369e73a819dSTao Ma u32 cpos = 0; 1370e73a819dSTao Ma struct ocfs2_refcount_block *rb = 1371e73a819dSTao Ma (struct ocfs2_refcount_block *)ref_leaf_bh->b_data; 1372e73a819dSTao Ma struct ocfs2_refcount_list *rl = &rb->rf_records; 1373e73a819dSTao Ma struct ocfs2_refcount_block *new_rb = 1374e73a819dSTao Ma (struct ocfs2_refcount_block *)new_bh->b_data; 1375e73a819dSTao Ma struct ocfs2_refcount_list *new_rl = &new_rb->rf_records; 1376e73a819dSTao Ma 1377e73a819dSTao Ma mlog(0, "split old leaf refcount block %llu, count = %u, used = %u\n", 1378e73a819dSTao Ma (unsigned long long)ref_leaf_bh->b_blocknr, 1379e73a819dSTao Ma le32_to_cpu(rl->rl_count), le32_to_cpu(rl->rl_used)); 1380e73a819dSTao Ma 1381e73a819dSTao Ma /* 1382e73a819dSTao Ma * XXX: Improvement later. 1383e73a819dSTao Ma * If we know all the high 32 bit cpos is the same, no need to sort. 1384e73a819dSTao Ma * 1385e73a819dSTao Ma * In order to make the whole process safe, we do: 1386e73a819dSTao Ma * 1. sort the entries by their low 32 bit cpos first so that we can 1387e73a819dSTao Ma * find the split cpos easily. 1388e73a819dSTao Ma * 2. call ocfs2_insert_extent to insert the new refcount block. 1389e73a819dSTao Ma * 3. move the refcount rec to the new block. 1390e73a819dSTao Ma * 4. sort the entries by their 64 bit cpos. 1391e73a819dSTao Ma * 5. dirty the new_rb and rb. 1392e73a819dSTao Ma */ 1393e73a819dSTao Ma sort(&rl->rl_recs, le16_to_cpu(rl->rl_used), 1394e73a819dSTao Ma sizeof(struct ocfs2_refcount_rec), 1395e73a819dSTao Ma cmp_refcount_rec_by_low_cpos, swap_refcount_rec); 1396e73a819dSTao Ma 1397e73a819dSTao Ma ret = ocfs2_find_refcount_split_pos(rl, &cpos, &split_index); 1398e73a819dSTao Ma if (ret) { 1399e73a819dSTao Ma mlog_errno(ret); 1400e73a819dSTao Ma return ret; 1401e73a819dSTao Ma } 1402e73a819dSTao Ma 1403e73a819dSTao Ma new_rb->rf_cpos = cpu_to_le32(cpos); 1404e73a819dSTao Ma 1405e73a819dSTao Ma /* move refcount records starting from split_index to the new block. */ 1406e73a819dSTao Ma num_moved = le16_to_cpu(rl->rl_used) - split_index; 1407e73a819dSTao Ma memcpy(new_rl->rl_recs, &rl->rl_recs[split_index], 1408e73a819dSTao Ma num_moved * sizeof(struct ocfs2_refcount_rec)); 1409e73a819dSTao Ma 1410e73a819dSTao Ma /*ok, remove the entries we just moved over to the other block. */ 1411e73a819dSTao Ma memset(&rl->rl_recs[split_index], 0, 1412e73a819dSTao Ma num_moved * sizeof(struct ocfs2_refcount_rec)); 1413e73a819dSTao Ma 1414e73a819dSTao Ma /* change old and new rl_used accordingly. */ 1415e73a819dSTao Ma le16_add_cpu(&rl->rl_used, -num_moved); 1416e73a819dSTao Ma new_rl->rl_used = cpu_to_le32(num_moved); 1417e73a819dSTao Ma 1418e73a819dSTao Ma sort(&rl->rl_recs, le16_to_cpu(rl->rl_used), 1419e73a819dSTao Ma sizeof(struct ocfs2_refcount_rec), 1420e73a819dSTao Ma cmp_refcount_rec_by_cpos, swap_refcount_rec); 1421e73a819dSTao Ma 1422e73a819dSTao Ma sort(&new_rl->rl_recs, le16_to_cpu(new_rl->rl_used), 1423e73a819dSTao Ma sizeof(struct ocfs2_refcount_rec), 1424e73a819dSTao Ma cmp_refcount_rec_by_cpos, swap_refcount_rec); 1425e73a819dSTao Ma 1426e73a819dSTao Ma *split_cpos = cpos; 1427e73a819dSTao Ma return 0; 1428e73a819dSTao Ma } 1429e73a819dSTao Ma 1430e73a819dSTao Ma static int ocfs2_new_leaf_refcount_block(handle_t *handle, 1431e73a819dSTao Ma struct ocfs2_caching_info *ci, 1432e73a819dSTao Ma struct buffer_head *ref_root_bh, 1433e73a819dSTao Ma struct buffer_head *ref_leaf_bh, 1434e73a819dSTao Ma struct ocfs2_alloc_context *meta_ac) 1435e73a819dSTao Ma { 1436e73a819dSTao Ma int ret; 1437e73a819dSTao Ma u16 suballoc_bit_start; 1438e73a819dSTao Ma u32 num_got, new_cpos; 1439e73a819dSTao Ma u64 blkno; 1440e73a819dSTao Ma struct super_block *sb = ocfs2_metadata_cache_get_super(ci); 1441e73a819dSTao Ma struct ocfs2_refcount_block *root_rb = 1442e73a819dSTao Ma (struct ocfs2_refcount_block *)ref_root_bh->b_data; 1443e73a819dSTao Ma struct buffer_head *new_bh = NULL; 1444e73a819dSTao Ma struct ocfs2_refcount_block *new_rb; 1445e73a819dSTao Ma struct ocfs2_extent_tree ref_et; 1446e73a819dSTao Ma 1447e73a819dSTao Ma BUG_ON(!(le32_to_cpu(root_rb->rf_flags) & OCFS2_REFCOUNT_TREE_FL)); 1448e73a819dSTao Ma 1449e73a819dSTao Ma ret = ocfs2_journal_access_rb(handle, ci, ref_root_bh, 1450e73a819dSTao Ma OCFS2_JOURNAL_ACCESS_WRITE); 1451e73a819dSTao Ma if (ret) { 1452e73a819dSTao Ma mlog_errno(ret); 1453e73a819dSTao Ma goto out; 1454e73a819dSTao Ma } 1455e73a819dSTao Ma 1456e73a819dSTao Ma ret = ocfs2_journal_access_rb(handle, ci, ref_leaf_bh, 1457e73a819dSTao Ma OCFS2_JOURNAL_ACCESS_WRITE); 1458e73a819dSTao Ma if (ret) { 1459e73a819dSTao Ma mlog_errno(ret); 1460e73a819dSTao Ma goto out; 1461e73a819dSTao Ma } 1462e73a819dSTao Ma 1463e73a819dSTao Ma ret = ocfs2_claim_metadata(OCFS2_SB(sb), handle, meta_ac, 1, 1464e73a819dSTao Ma &suballoc_bit_start, &num_got, 1465e73a819dSTao Ma &blkno); 1466e73a819dSTao Ma if (ret) { 1467e73a819dSTao Ma mlog_errno(ret); 1468e73a819dSTao Ma goto out; 1469e73a819dSTao Ma } 1470e73a819dSTao Ma 1471e73a819dSTao Ma new_bh = sb_getblk(sb, blkno); 1472e73a819dSTao Ma if (new_bh == NULL) { 1473e73a819dSTao Ma ret = -EIO; 1474e73a819dSTao Ma mlog_errno(ret); 1475e73a819dSTao Ma goto out; 1476e73a819dSTao Ma } 1477e73a819dSTao Ma ocfs2_set_new_buffer_uptodate(ci, new_bh); 1478e73a819dSTao Ma 1479e73a819dSTao Ma ret = ocfs2_journal_access_rb(handle, ci, new_bh, 1480e73a819dSTao Ma OCFS2_JOURNAL_ACCESS_CREATE); 1481e73a819dSTao Ma if (ret) { 1482e73a819dSTao Ma mlog_errno(ret); 1483e73a819dSTao Ma goto out; 1484e73a819dSTao Ma } 1485e73a819dSTao Ma 1486e73a819dSTao Ma /* Initialize ocfs2_refcount_block. */ 1487e73a819dSTao Ma new_rb = (struct ocfs2_refcount_block *)new_bh->b_data; 1488e73a819dSTao Ma memset(new_rb, 0, sb->s_blocksize); 1489e73a819dSTao Ma strcpy((void *)new_rb, OCFS2_REFCOUNT_BLOCK_SIGNATURE); 1490e73a819dSTao Ma new_rb->rf_suballoc_slot = cpu_to_le16(OCFS2_SB(sb)->slot_num); 1491e73a819dSTao Ma new_rb->rf_suballoc_bit = cpu_to_le16(suballoc_bit_start); 1492e73a819dSTao Ma new_rb->rf_fs_generation = cpu_to_le32(OCFS2_SB(sb)->fs_generation); 1493e73a819dSTao Ma new_rb->rf_blkno = cpu_to_le64(blkno); 1494e73a819dSTao Ma new_rb->rf_parent = cpu_to_le64(ref_root_bh->b_blocknr); 1495e73a819dSTao Ma new_rb->rf_flags = cpu_to_le32(OCFS2_REFCOUNT_LEAF_FL); 1496e73a819dSTao Ma new_rb->rf_records.rl_count = 1497e73a819dSTao Ma cpu_to_le16(ocfs2_refcount_recs_per_rb(sb)); 1498e73a819dSTao Ma new_rb->rf_generation = root_rb->rf_generation; 1499e73a819dSTao Ma 1500e73a819dSTao Ma ret = ocfs2_divide_leaf_refcount_block(ref_leaf_bh, new_bh, &new_cpos); 1501e73a819dSTao Ma if (ret) { 1502e73a819dSTao Ma mlog_errno(ret); 1503e73a819dSTao Ma goto out; 1504e73a819dSTao Ma } 1505e73a819dSTao Ma 1506e73a819dSTao Ma ocfs2_journal_dirty(handle, ref_leaf_bh); 1507e73a819dSTao Ma ocfs2_journal_dirty(handle, new_bh); 1508e73a819dSTao Ma 1509e73a819dSTao Ma ocfs2_init_refcount_extent_tree(&ref_et, ci, ref_root_bh); 1510e73a819dSTao Ma 1511e73a819dSTao Ma mlog(0, "insert new leaf block %llu at %u\n", 1512e73a819dSTao Ma (unsigned long long)new_bh->b_blocknr, new_cpos); 1513e73a819dSTao Ma 1514e73a819dSTao Ma /* Insert the new leaf block with the specific offset cpos. */ 1515e73a819dSTao Ma ret = ocfs2_insert_extent(handle, &ref_et, new_cpos, new_bh->b_blocknr, 1516e73a819dSTao Ma 1, 0, meta_ac); 1517e73a819dSTao Ma if (ret) 1518e73a819dSTao Ma mlog_errno(ret); 1519e73a819dSTao Ma 1520e73a819dSTao Ma out: 1521e73a819dSTao Ma brelse(new_bh); 1522e73a819dSTao Ma return ret; 1523e73a819dSTao Ma } 1524e73a819dSTao Ma 1525e73a819dSTao Ma static int ocfs2_expand_refcount_tree(handle_t *handle, 1526e73a819dSTao Ma struct ocfs2_caching_info *ci, 1527e73a819dSTao Ma struct buffer_head *ref_root_bh, 1528e73a819dSTao Ma struct buffer_head *ref_leaf_bh, 1529e73a819dSTao Ma struct ocfs2_alloc_context *meta_ac) 1530e73a819dSTao Ma { 1531e73a819dSTao Ma int ret; 1532e73a819dSTao Ma struct buffer_head *expand_bh = NULL; 1533e73a819dSTao Ma 1534e73a819dSTao Ma if (ref_root_bh == ref_leaf_bh) { 1535e73a819dSTao Ma /* 1536e73a819dSTao Ma * the old root bh hasn't been expanded to a b-tree, 1537e73a819dSTao Ma * so expand it first. 1538e73a819dSTao Ma */ 1539e73a819dSTao Ma ret = ocfs2_expand_inline_ref_root(handle, ci, ref_root_bh, 1540e73a819dSTao Ma &expand_bh, meta_ac); 1541e73a819dSTao Ma if (ret) { 1542e73a819dSTao Ma mlog_errno(ret); 1543e73a819dSTao Ma goto out; 1544e73a819dSTao Ma } 1545e73a819dSTao Ma } else { 1546e73a819dSTao Ma expand_bh = ref_leaf_bh; 1547e73a819dSTao Ma get_bh(expand_bh); 1548e73a819dSTao Ma } 1549e73a819dSTao Ma 1550e73a819dSTao Ma 1551e73a819dSTao Ma /* Now add a new refcount block into the tree.*/ 1552e73a819dSTao Ma ret = ocfs2_new_leaf_refcount_block(handle, ci, ref_root_bh, 1553e73a819dSTao Ma expand_bh, meta_ac); 1554e73a819dSTao Ma if (ret) 1555e73a819dSTao Ma mlog_errno(ret); 1556e73a819dSTao Ma out: 1557e73a819dSTao Ma brelse(expand_bh); 1558e73a819dSTao Ma return ret; 1559e73a819dSTao Ma } 1560e73a819dSTao Ma 1561e73a819dSTao Ma /* 1562e73a819dSTao Ma * Adjust the extent rec in b-tree representing ref_leaf_bh. 1563e73a819dSTao Ma * 1564e73a819dSTao Ma * Only called when we have inserted a new refcount rec at index 0 1565e73a819dSTao Ma * which means ocfs2_extent_rec.e_cpos may need some change. 1566e73a819dSTao Ma */ 1567e73a819dSTao Ma static int ocfs2_adjust_refcount_rec(handle_t *handle, 1568e73a819dSTao Ma struct ocfs2_caching_info *ci, 1569e73a819dSTao Ma struct buffer_head *ref_root_bh, 1570e73a819dSTao Ma struct buffer_head *ref_leaf_bh, 1571e73a819dSTao Ma struct ocfs2_refcount_rec *rec) 1572e73a819dSTao Ma { 1573e73a819dSTao Ma int ret = 0, i; 1574e73a819dSTao Ma u32 new_cpos, old_cpos; 1575e73a819dSTao Ma struct ocfs2_path *path = NULL; 1576e73a819dSTao Ma struct ocfs2_extent_tree et; 1577e73a819dSTao Ma struct ocfs2_refcount_block *rb = 1578e73a819dSTao Ma (struct ocfs2_refcount_block *)ref_root_bh->b_data; 1579e73a819dSTao Ma struct ocfs2_extent_list *el; 1580e73a819dSTao Ma 1581e73a819dSTao Ma if (!(le32_to_cpu(rb->rf_flags) & OCFS2_REFCOUNT_TREE_FL)) 1582e73a819dSTao Ma goto out; 1583e73a819dSTao Ma 1584e73a819dSTao Ma rb = (struct ocfs2_refcount_block *)ref_leaf_bh->b_data; 1585e73a819dSTao Ma old_cpos = le32_to_cpu(rb->rf_cpos); 1586e73a819dSTao Ma new_cpos = le64_to_cpu(rec->r_cpos) & OCFS2_32BIT_POS_MASK; 1587e73a819dSTao Ma if (old_cpos <= new_cpos) 1588e73a819dSTao Ma goto out; 1589e73a819dSTao Ma 1590e73a819dSTao Ma ocfs2_init_refcount_extent_tree(&et, ci, ref_root_bh); 1591e73a819dSTao Ma 1592e73a819dSTao Ma path = ocfs2_new_path_from_et(&et); 1593e73a819dSTao Ma if (!path) { 1594e73a819dSTao Ma ret = -ENOMEM; 1595e73a819dSTao Ma mlog_errno(ret); 1596e73a819dSTao Ma goto out; 1597e73a819dSTao Ma } 1598e73a819dSTao Ma 1599e73a819dSTao Ma ret = ocfs2_find_path(ci, path, old_cpos); 1600e73a819dSTao Ma if (ret) { 1601e73a819dSTao Ma mlog_errno(ret); 1602e73a819dSTao Ma goto out; 1603e73a819dSTao Ma } 1604e73a819dSTao Ma 1605e73a819dSTao Ma /* 1606e73a819dSTao Ma * 2 more credits, one for the leaf refcount block, one for 1607e73a819dSTao Ma * the extent block contains the extent rec. 1608e73a819dSTao Ma */ 1609e73a819dSTao Ma ret = ocfs2_extend_trans(handle, handle->h_buffer_credits + 2); 1610e73a819dSTao Ma if (ret < 0) { 1611e73a819dSTao Ma mlog_errno(ret); 1612e73a819dSTao Ma goto out; 1613e73a819dSTao Ma } 1614e73a819dSTao Ma 1615e73a819dSTao Ma ret = ocfs2_journal_access_rb(handle, ci, ref_leaf_bh, 1616e73a819dSTao Ma OCFS2_JOURNAL_ACCESS_WRITE); 1617e73a819dSTao Ma if (ret < 0) { 1618e73a819dSTao Ma mlog_errno(ret); 1619e73a819dSTao Ma goto out; 1620e73a819dSTao Ma } 1621e73a819dSTao Ma 1622e73a819dSTao Ma ret = ocfs2_journal_access_eb(handle, ci, path_leaf_bh(path), 1623e73a819dSTao Ma OCFS2_JOURNAL_ACCESS_WRITE); 1624e73a819dSTao Ma if (ret < 0) { 1625e73a819dSTao Ma mlog_errno(ret); 1626e73a819dSTao Ma goto out; 1627e73a819dSTao Ma } 1628e73a819dSTao Ma 1629e73a819dSTao Ma /* change the leaf extent block first. */ 1630e73a819dSTao Ma el = path_leaf_el(path); 1631e73a819dSTao Ma 1632e73a819dSTao Ma for (i = 0; i < le16_to_cpu(el->l_next_free_rec); i++) 1633e73a819dSTao Ma if (le32_to_cpu(el->l_recs[i].e_cpos) == old_cpos) 1634e73a819dSTao Ma break; 1635e73a819dSTao Ma 1636e73a819dSTao Ma BUG_ON(i == le16_to_cpu(el->l_next_free_rec)); 1637e73a819dSTao Ma 1638e73a819dSTao Ma el->l_recs[i].e_cpos = cpu_to_le32(new_cpos); 1639e73a819dSTao Ma 1640e73a819dSTao Ma /* change the r_cpos in the leaf block. */ 1641e73a819dSTao Ma rb->rf_cpos = cpu_to_le32(new_cpos); 1642e73a819dSTao Ma 1643e73a819dSTao Ma ocfs2_journal_dirty(handle, path_leaf_bh(path)); 1644e73a819dSTao Ma ocfs2_journal_dirty(handle, ref_leaf_bh); 1645e73a819dSTao Ma 1646e73a819dSTao Ma out: 1647e73a819dSTao Ma ocfs2_free_path(path); 1648e73a819dSTao Ma return ret; 1649e73a819dSTao Ma } 1650e73a819dSTao Ma 1651e73a819dSTao Ma static int ocfs2_insert_refcount_rec(handle_t *handle, 1652e73a819dSTao Ma struct ocfs2_caching_info *ci, 1653e73a819dSTao Ma struct buffer_head *ref_root_bh, 1654e73a819dSTao Ma struct buffer_head *ref_leaf_bh, 1655e73a819dSTao Ma struct ocfs2_refcount_rec *rec, 16567540c1a7STao Ma int index, int merge, 1657e73a819dSTao Ma struct ocfs2_alloc_context *meta_ac) 1658e73a819dSTao Ma { 1659e73a819dSTao Ma int ret; 1660e73a819dSTao Ma struct ocfs2_refcount_block *rb = 1661e73a819dSTao Ma (struct ocfs2_refcount_block *)ref_leaf_bh->b_data; 1662e73a819dSTao Ma struct ocfs2_refcount_list *rf_list = &rb->rf_records; 1663e73a819dSTao Ma struct buffer_head *new_bh = NULL; 1664e73a819dSTao Ma 1665e73a819dSTao Ma BUG_ON(le32_to_cpu(rb->rf_flags) & OCFS2_REFCOUNT_TREE_FL); 1666e73a819dSTao Ma 1667e73a819dSTao Ma if (rf_list->rl_used == rf_list->rl_count) { 1668e73a819dSTao Ma u64 cpos = le64_to_cpu(rec->r_cpos); 1669e73a819dSTao Ma u32 len = le32_to_cpu(rec->r_clusters); 1670e73a819dSTao Ma 1671e73a819dSTao Ma ret = ocfs2_expand_refcount_tree(handle, ci, ref_root_bh, 1672e73a819dSTao Ma ref_leaf_bh, meta_ac); 1673e73a819dSTao Ma if (ret) { 1674e73a819dSTao Ma mlog_errno(ret); 1675e73a819dSTao Ma goto out; 1676e73a819dSTao Ma } 1677e73a819dSTao Ma 1678e73a819dSTao Ma ret = ocfs2_get_refcount_rec(ci, ref_root_bh, 1679e73a819dSTao Ma cpos, len, NULL, &index, 1680e73a819dSTao Ma &new_bh); 1681e73a819dSTao Ma if (ret) { 1682e73a819dSTao Ma mlog_errno(ret); 1683e73a819dSTao Ma goto out; 1684e73a819dSTao Ma } 1685e73a819dSTao Ma 1686e73a819dSTao Ma ref_leaf_bh = new_bh; 1687e73a819dSTao Ma rb = (struct ocfs2_refcount_block *)ref_leaf_bh->b_data; 1688e73a819dSTao Ma rf_list = &rb->rf_records; 1689e73a819dSTao Ma } 1690e73a819dSTao Ma 1691e73a819dSTao Ma ret = ocfs2_journal_access_rb(handle, ci, ref_leaf_bh, 1692e73a819dSTao Ma OCFS2_JOURNAL_ACCESS_WRITE); 1693e73a819dSTao Ma if (ret) { 1694e73a819dSTao Ma mlog_errno(ret); 1695e73a819dSTao Ma goto out; 1696e73a819dSTao Ma } 1697e73a819dSTao Ma 1698e73a819dSTao Ma if (index < le16_to_cpu(rf_list->rl_used)) 1699e73a819dSTao Ma memmove(&rf_list->rl_recs[index + 1], 1700e73a819dSTao Ma &rf_list->rl_recs[index], 1701e73a819dSTao Ma (le16_to_cpu(rf_list->rl_used) - index) * 1702e73a819dSTao Ma sizeof(struct ocfs2_refcount_rec)); 1703e73a819dSTao Ma 1704e73a819dSTao Ma mlog(0, "insert refcount record start %llu, len %u, count %u " 1705e73a819dSTao Ma "to leaf block %llu at index %d\n", 1706e73a819dSTao Ma (unsigned long long)le64_to_cpu(rec->r_cpos), 1707e73a819dSTao Ma le32_to_cpu(rec->r_clusters), le32_to_cpu(rec->r_refcount), 1708e73a819dSTao Ma (unsigned long long)ref_leaf_bh->b_blocknr, index); 1709e73a819dSTao Ma 1710e73a819dSTao Ma rf_list->rl_recs[index] = *rec; 1711e73a819dSTao Ma 1712e73a819dSTao Ma le16_add_cpu(&rf_list->rl_used, 1); 1713e73a819dSTao Ma 17147540c1a7STao Ma if (merge) 1715e73a819dSTao Ma ocfs2_refcount_rec_merge(rb, index); 1716e73a819dSTao Ma 1717e73a819dSTao Ma ret = ocfs2_journal_dirty(handle, ref_leaf_bh); 1718e73a819dSTao Ma if (ret) { 1719e73a819dSTao Ma mlog_errno(ret); 1720e73a819dSTao Ma goto out; 1721e73a819dSTao Ma } 1722e73a819dSTao Ma 1723e73a819dSTao Ma if (index == 0) { 1724e73a819dSTao Ma ret = ocfs2_adjust_refcount_rec(handle, ci, 1725e73a819dSTao Ma ref_root_bh, 1726e73a819dSTao Ma ref_leaf_bh, rec); 1727e73a819dSTao Ma if (ret) 1728e73a819dSTao Ma mlog_errno(ret); 1729e73a819dSTao Ma } 1730e73a819dSTao Ma out: 1731e73a819dSTao Ma brelse(new_bh); 1732e73a819dSTao Ma return ret; 1733e73a819dSTao Ma } 1734e73a819dSTao Ma 1735e73a819dSTao Ma /* 1736e73a819dSTao Ma * Split the refcount_rec indexed by "index" in ref_leaf_bh. 1737e73a819dSTao Ma * This is much simple than our b-tree code. 1738e73a819dSTao Ma * split_rec is the new refcount rec we want to insert. 1739e73a819dSTao Ma * If split_rec->r_refcount > 0, we are changing the refcount(in case we 1740e73a819dSTao Ma * increase refcount or decrease a refcount to non-zero). 1741e73a819dSTao Ma * If split_rec->r_refcount == 0, we are punching a hole in current refcount 1742e73a819dSTao Ma * rec( in case we decrease a refcount to zero). 1743e73a819dSTao Ma */ 1744e73a819dSTao Ma static int ocfs2_split_refcount_rec(handle_t *handle, 1745e73a819dSTao Ma struct ocfs2_caching_info *ci, 1746e73a819dSTao Ma struct buffer_head *ref_root_bh, 1747e73a819dSTao Ma struct buffer_head *ref_leaf_bh, 1748e73a819dSTao Ma struct ocfs2_refcount_rec *split_rec, 17497540c1a7STao Ma int index, int merge, 1750e73a819dSTao Ma struct ocfs2_alloc_context *meta_ac, 1751e73a819dSTao Ma struct ocfs2_cached_dealloc_ctxt *dealloc) 1752e73a819dSTao Ma { 1753e73a819dSTao Ma int ret, recs_need; 1754e73a819dSTao Ma u32 len; 1755e73a819dSTao Ma struct ocfs2_refcount_block *rb = 1756e73a819dSTao Ma (struct ocfs2_refcount_block *)ref_leaf_bh->b_data; 1757e73a819dSTao Ma struct ocfs2_refcount_list *rf_list = &rb->rf_records; 1758e73a819dSTao Ma struct ocfs2_refcount_rec *orig_rec = &rf_list->rl_recs[index]; 1759e73a819dSTao Ma struct ocfs2_refcount_rec *tail_rec = NULL; 1760e73a819dSTao Ma struct buffer_head *new_bh = NULL; 1761e73a819dSTao Ma 1762e73a819dSTao Ma BUG_ON(le32_to_cpu(rb->rf_flags) & OCFS2_REFCOUNT_TREE_FL); 1763e73a819dSTao Ma 1764e73a819dSTao Ma mlog(0, "original r_pos %llu, cluster %u, split %llu, cluster %u\n", 1765e73a819dSTao Ma le64_to_cpu(orig_rec->r_cpos), le32_to_cpu(orig_rec->r_clusters), 1766e73a819dSTao Ma le64_to_cpu(split_rec->r_cpos), 1767e73a819dSTao Ma le32_to_cpu(split_rec->r_clusters)); 1768e73a819dSTao Ma 1769e73a819dSTao Ma /* 1770e73a819dSTao Ma * If we just need to split the header or tail clusters, 1771e73a819dSTao Ma * no more recs are needed, just split is OK. 1772e73a819dSTao Ma * Otherwise we at least need one new recs. 1773e73a819dSTao Ma */ 1774e73a819dSTao Ma if (!split_rec->r_refcount && 1775e73a819dSTao Ma (split_rec->r_cpos == orig_rec->r_cpos || 1776e73a819dSTao Ma le64_to_cpu(split_rec->r_cpos) + 1777e73a819dSTao Ma le32_to_cpu(split_rec->r_clusters) == 1778e73a819dSTao Ma le64_to_cpu(orig_rec->r_cpos) + le32_to_cpu(orig_rec->r_clusters))) 1779e73a819dSTao Ma recs_need = 0; 1780e73a819dSTao Ma else 1781e73a819dSTao Ma recs_need = 1; 1782e73a819dSTao Ma 1783e73a819dSTao Ma /* 1784e73a819dSTao Ma * We need one more rec if we split in the middle and the new rec have 1785e73a819dSTao Ma * some refcount in it. 1786e73a819dSTao Ma */ 1787e73a819dSTao Ma if (split_rec->r_refcount && 1788e73a819dSTao Ma (split_rec->r_cpos != orig_rec->r_cpos && 1789e73a819dSTao Ma le64_to_cpu(split_rec->r_cpos) + 1790e73a819dSTao Ma le32_to_cpu(split_rec->r_clusters) != 1791e73a819dSTao Ma le64_to_cpu(orig_rec->r_cpos) + le32_to_cpu(orig_rec->r_clusters))) 1792e73a819dSTao Ma recs_need++; 1793e73a819dSTao Ma 1794e73a819dSTao Ma /* If the leaf block don't have enough record, expand it. */ 1795e73a819dSTao Ma if (le16_to_cpu(rf_list->rl_used) + recs_need > rf_list->rl_count) { 1796e73a819dSTao Ma struct ocfs2_refcount_rec tmp_rec; 1797e73a819dSTao Ma u64 cpos = le64_to_cpu(orig_rec->r_cpos); 1798e73a819dSTao Ma len = le32_to_cpu(orig_rec->r_clusters); 1799e73a819dSTao Ma ret = ocfs2_expand_refcount_tree(handle, ci, ref_root_bh, 1800e73a819dSTao Ma ref_leaf_bh, meta_ac); 1801e73a819dSTao Ma if (ret) { 1802e73a819dSTao Ma mlog_errno(ret); 1803e73a819dSTao Ma goto out; 1804e73a819dSTao Ma } 1805e73a819dSTao Ma 1806e73a819dSTao Ma /* 1807e73a819dSTao Ma * We have to re-get it since now cpos may be moved to 1808e73a819dSTao Ma * another leaf block. 1809e73a819dSTao Ma */ 1810e73a819dSTao Ma ret = ocfs2_get_refcount_rec(ci, ref_root_bh, 1811e73a819dSTao Ma cpos, len, &tmp_rec, &index, 1812e73a819dSTao Ma &new_bh); 1813e73a819dSTao Ma if (ret) { 1814e73a819dSTao Ma mlog_errno(ret); 1815e73a819dSTao Ma goto out; 1816e73a819dSTao Ma } 1817e73a819dSTao Ma 1818e73a819dSTao Ma ref_leaf_bh = new_bh; 1819e73a819dSTao Ma rb = (struct ocfs2_refcount_block *)ref_leaf_bh->b_data; 1820e73a819dSTao Ma rf_list = &rb->rf_records; 1821e73a819dSTao Ma orig_rec = &rf_list->rl_recs[index]; 1822e73a819dSTao Ma } 1823e73a819dSTao Ma 1824e73a819dSTao Ma ret = ocfs2_journal_access_rb(handle, ci, ref_leaf_bh, 1825e73a819dSTao Ma OCFS2_JOURNAL_ACCESS_WRITE); 1826e73a819dSTao Ma if (ret) { 1827e73a819dSTao Ma mlog_errno(ret); 1828e73a819dSTao Ma goto out; 1829e73a819dSTao Ma } 1830e73a819dSTao Ma 1831e73a819dSTao Ma /* 1832e73a819dSTao Ma * We have calculated out how many new records we need and store 1833e73a819dSTao Ma * in recs_need, so spare enough space first by moving the records 1834e73a819dSTao Ma * after "index" to the end. 1835e73a819dSTao Ma */ 1836e73a819dSTao Ma if (index != le16_to_cpu(rf_list->rl_used) - 1) 1837e73a819dSTao Ma memmove(&rf_list->rl_recs[index + 1 + recs_need], 1838e73a819dSTao Ma &rf_list->rl_recs[index + 1], 1839e73a819dSTao Ma (le16_to_cpu(rf_list->rl_used) - index - 1) * 1840e73a819dSTao Ma sizeof(struct ocfs2_refcount_rec)); 1841e73a819dSTao Ma 1842e73a819dSTao Ma len = (le64_to_cpu(orig_rec->r_cpos) + 1843e73a819dSTao Ma le32_to_cpu(orig_rec->r_clusters)) - 1844e73a819dSTao Ma (le64_to_cpu(split_rec->r_cpos) + 1845e73a819dSTao Ma le32_to_cpu(split_rec->r_clusters)); 1846e73a819dSTao Ma 1847e73a819dSTao Ma /* 1848e73a819dSTao Ma * If we have "len", the we will split in the tail and move it 1849e73a819dSTao Ma * to the end of the space we have just spared. 1850e73a819dSTao Ma */ 1851e73a819dSTao Ma if (len) { 1852e73a819dSTao Ma tail_rec = &rf_list->rl_recs[index + recs_need]; 1853e73a819dSTao Ma 1854e73a819dSTao Ma memcpy(tail_rec, orig_rec, sizeof(struct ocfs2_refcount_rec)); 1855e73a819dSTao Ma le64_add_cpu(&tail_rec->r_cpos, 1856e73a819dSTao Ma le32_to_cpu(tail_rec->r_clusters) - len); 1857e73a819dSTao Ma tail_rec->r_clusters = le32_to_cpu(len); 1858e73a819dSTao Ma } 1859e73a819dSTao Ma 1860e73a819dSTao Ma /* 1861e73a819dSTao Ma * If the split pos isn't the same as the original one, we need to 1862e73a819dSTao Ma * split in the head. 1863e73a819dSTao Ma * 1864e73a819dSTao Ma * Note: We have the chance that split_rec.r_refcount = 0, 1865e73a819dSTao Ma * recs_need = 0 and len > 0, which means we just cut the head from 1866e73a819dSTao Ma * the orig_rec and in that case we have done some modification in 1867e73a819dSTao Ma * orig_rec above, so the check for r_cpos is faked. 1868e73a819dSTao Ma */ 1869e73a819dSTao Ma if (split_rec->r_cpos != orig_rec->r_cpos && tail_rec != orig_rec) { 1870e73a819dSTao Ma len = le64_to_cpu(split_rec->r_cpos) - 1871e73a819dSTao Ma le64_to_cpu(orig_rec->r_cpos); 1872e73a819dSTao Ma orig_rec->r_clusters = cpu_to_le32(len); 1873e73a819dSTao Ma index++; 1874e73a819dSTao Ma } 1875e73a819dSTao Ma 1876e73a819dSTao Ma le16_add_cpu(&rf_list->rl_used, recs_need); 1877e73a819dSTao Ma 1878e73a819dSTao Ma if (split_rec->r_refcount) { 1879e73a819dSTao Ma rf_list->rl_recs[index] = *split_rec; 1880e73a819dSTao Ma mlog(0, "insert refcount record start %llu, len %u, count %u " 1881e73a819dSTao Ma "to leaf block %llu at index %d\n", 1882e73a819dSTao Ma (unsigned long long)le64_to_cpu(split_rec->r_cpos), 1883e73a819dSTao Ma le32_to_cpu(split_rec->r_clusters), 1884e73a819dSTao Ma le32_to_cpu(split_rec->r_refcount), 1885e73a819dSTao Ma (unsigned long long)ref_leaf_bh->b_blocknr, index); 1886e73a819dSTao Ma 18877540c1a7STao Ma if (merge) 1888e73a819dSTao Ma ocfs2_refcount_rec_merge(rb, index); 1889e73a819dSTao Ma } 1890e73a819dSTao Ma 1891e73a819dSTao Ma ret = ocfs2_journal_dirty(handle, ref_leaf_bh); 1892e73a819dSTao Ma if (ret) 1893e73a819dSTao Ma mlog_errno(ret); 1894e73a819dSTao Ma 1895e73a819dSTao Ma out: 1896e73a819dSTao Ma brelse(new_bh); 1897e73a819dSTao Ma return ret; 1898e73a819dSTao Ma } 1899e73a819dSTao Ma 19007540c1a7STao Ma static int __ocfs2_increase_refcount(handle_t *handle, 1901e73a819dSTao Ma struct ocfs2_caching_info *ci, 1902e73a819dSTao Ma struct buffer_head *ref_root_bh, 19037540c1a7STao Ma u64 cpos, u32 len, int merge, 1904e73a819dSTao Ma struct ocfs2_alloc_context *meta_ac, 1905e73a819dSTao Ma struct ocfs2_cached_dealloc_ctxt *dealloc) 1906e73a819dSTao Ma { 1907e73a819dSTao Ma int ret = 0, index; 1908e73a819dSTao Ma struct buffer_head *ref_leaf_bh = NULL; 1909e73a819dSTao Ma struct ocfs2_refcount_rec rec; 1910e73a819dSTao Ma unsigned int set_len = 0; 1911e73a819dSTao Ma 1912e73a819dSTao Ma mlog(0, "Tree owner %llu, add refcount start %llu, len %u\n", 1913e73a819dSTao Ma (unsigned long long)ocfs2_metadata_cache_owner(ci), 1914e73a819dSTao Ma (unsigned long long)cpos, len); 1915e73a819dSTao Ma 1916e73a819dSTao Ma while (len) { 1917e73a819dSTao Ma ret = ocfs2_get_refcount_rec(ci, ref_root_bh, 1918e73a819dSTao Ma cpos, len, &rec, &index, 1919e73a819dSTao Ma &ref_leaf_bh); 1920e73a819dSTao Ma if (ret) { 1921e73a819dSTao Ma mlog_errno(ret); 1922e73a819dSTao Ma goto out; 1923e73a819dSTao Ma } 1924e73a819dSTao Ma 1925e73a819dSTao Ma set_len = le32_to_cpu(rec.r_clusters); 1926e73a819dSTao Ma 1927e73a819dSTao Ma /* 1928e73a819dSTao Ma * Here we may meet with 3 situations: 1929e73a819dSTao Ma * 1930e73a819dSTao Ma * 1. If we find an already existing record, and the length 1931e73a819dSTao Ma * is the same, cool, we just need to increase the r_refcount 1932e73a819dSTao Ma * and it is OK. 1933e73a819dSTao Ma * 2. If we find a hole, just insert it with r_refcount = 1. 1934e73a819dSTao Ma * 3. If we are in the middle of one extent record, split 1935e73a819dSTao Ma * it. 1936e73a819dSTao Ma */ 1937e73a819dSTao Ma if (rec.r_refcount && le64_to_cpu(rec.r_cpos) == cpos && 1938e73a819dSTao Ma set_len <= len) { 1939e73a819dSTao Ma mlog(0, "increase refcount rec, start %llu, len %u, " 1940e73a819dSTao Ma "count %u\n", (unsigned long long)cpos, set_len, 1941e73a819dSTao Ma le32_to_cpu(rec.r_refcount)); 1942e73a819dSTao Ma ret = ocfs2_change_refcount_rec(handle, ci, 19437540c1a7STao Ma ref_leaf_bh, index, 19447540c1a7STao Ma merge, 1); 1945e73a819dSTao Ma if (ret) { 1946e73a819dSTao Ma mlog_errno(ret); 1947e73a819dSTao Ma goto out; 1948e73a819dSTao Ma } 1949e73a819dSTao Ma } else if (!rec.r_refcount) { 1950e73a819dSTao Ma rec.r_refcount = cpu_to_le32(1); 1951e73a819dSTao Ma 1952e73a819dSTao Ma mlog(0, "insert refcount rec, start %llu, len %u\n", 1953e73a819dSTao Ma (unsigned long long)le64_to_cpu(rec.r_cpos), 1954e73a819dSTao Ma set_len); 1955e73a819dSTao Ma ret = ocfs2_insert_refcount_rec(handle, ci, ref_root_bh, 1956e73a819dSTao Ma ref_leaf_bh, 19577540c1a7STao Ma &rec, index, 19587540c1a7STao Ma merge, meta_ac); 1959e73a819dSTao Ma if (ret) { 1960e73a819dSTao Ma mlog_errno(ret); 1961e73a819dSTao Ma goto out; 1962e73a819dSTao Ma } 1963e73a819dSTao Ma } else { 1964e73a819dSTao Ma set_len = min((u64)(cpos + len), 1965e73a819dSTao Ma le64_to_cpu(rec.r_cpos) + set_len) - cpos; 1966e73a819dSTao Ma rec.r_cpos = cpu_to_le64(cpos); 1967e73a819dSTao Ma rec.r_clusters = cpu_to_le32(set_len); 1968e73a819dSTao Ma le32_add_cpu(&rec.r_refcount, 1); 1969e73a819dSTao Ma 1970e73a819dSTao Ma mlog(0, "split refcount rec, start %llu, " 1971e73a819dSTao Ma "len %u, count %u\n", 1972e73a819dSTao Ma (unsigned long long)le64_to_cpu(rec.r_cpos), 1973e73a819dSTao Ma set_len, le32_to_cpu(rec.r_refcount)); 1974e73a819dSTao Ma ret = ocfs2_split_refcount_rec(handle, ci, 1975e73a819dSTao Ma ref_root_bh, ref_leaf_bh, 19767540c1a7STao Ma &rec, index, merge, 1977e73a819dSTao Ma meta_ac, dealloc); 1978e73a819dSTao Ma if (ret) { 1979e73a819dSTao Ma mlog_errno(ret); 1980e73a819dSTao Ma goto out; 1981e73a819dSTao Ma } 1982e73a819dSTao Ma } 1983e73a819dSTao Ma 1984e73a819dSTao Ma cpos += set_len; 1985e73a819dSTao Ma len -= set_len; 1986e73a819dSTao Ma brelse(ref_leaf_bh); 1987e73a819dSTao Ma ref_leaf_bh = NULL; 1988e73a819dSTao Ma } 1989e73a819dSTao Ma 1990e73a819dSTao Ma out: 1991e73a819dSTao Ma brelse(ref_leaf_bh); 1992e73a819dSTao Ma return ret; 1993e73a819dSTao Ma } 19941823cb0bSTao Ma 19951823cb0bSTao Ma static int ocfs2_remove_refcount_extent(handle_t *handle, 19961823cb0bSTao Ma struct ocfs2_caching_info *ci, 19971823cb0bSTao Ma struct buffer_head *ref_root_bh, 19981823cb0bSTao Ma struct buffer_head *ref_leaf_bh, 19991823cb0bSTao Ma struct ocfs2_alloc_context *meta_ac, 20001823cb0bSTao Ma struct ocfs2_cached_dealloc_ctxt *dealloc) 20011823cb0bSTao Ma { 20021823cb0bSTao Ma int ret; 20031823cb0bSTao Ma struct super_block *sb = ocfs2_metadata_cache_get_super(ci); 20041823cb0bSTao Ma struct ocfs2_refcount_block *rb = 20051823cb0bSTao Ma (struct ocfs2_refcount_block *)ref_leaf_bh->b_data; 20061823cb0bSTao Ma struct ocfs2_extent_tree et; 20071823cb0bSTao Ma 20081823cb0bSTao Ma BUG_ON(rb->rf_records.rl_used); 20091823cb0bSTao Ma 20101823cb0bSTao Ma ocfs2_init_refcount_extent_tree(&et, ci, ref_root_bh); 20111823cb0bSTao Ma ret = ocfs2_remove_extent(handle, &et, le32_to_cpu(rb->rf_cpos), 20121823cb0bSTao Ma 1, meta_ac, dealloc); 20131823cb0bSTao Ma if (ret) { 20141823cb0bSTao Ma mlog_errno(ret); 20151823cb0bSTao Ma goto out; 20161823cb0bSTao Ma } 20171823cb0bSTao Ma 20181823cb0bSTao Ma ocfs2_remove_from_cache(ci, ref_leaf_bh); 20191823cb0bSTao Ma 20201823cb0bSTao Ma /* 20211823cb0bSTao Ma * add the freed block to the dealloc so that it will be freed 20221823cb0bSTao Ma * when we run dealloc. 20231823cb0bSTao Ma */ 20241823cb0bSTao Ma ret = ocfs2_cache_block_dealloc(dealloc, EXTENT_ALLOC_SYSTEM_INODE, 20251823cb0bSTao Ma le16_to_cpu(rb->rf_suballoc_slot), 20261823cb0bSTao Ma le64_to_cpu(rb->rf_blkno), 20271823cb0bSTao Ma le16_to_cpu(rb->rf_suballoc_bit)); 20281823cb0bSTao Ma if (ret) { 20291823cb0bSTao Ma mlog_errno(ret); 20301823cb0bSTao Ma goto out; 20311823cb0bSTao Ma } 20321823cb0bSTao Ma 20331823cb0bSTao Ma ret = ocfs2_journal_access_rb(handle, ci, ref_root_bh, 20341823cb0bSTao Ma OCFS2_JOURNAL_ACCESS_WRITE); 20351823cb0bSTao Ma if (ret) { 20361823cb0bSTao Ma mlog_errno(ret); 20371823cb0bSTao Ma goto out; 20381823cb0bSTao Ma } 20391823cb0bSTao Ma 20401823cb0bSTao Ma rb = (struct ocfs2_refcount_block *)ref_root_bh->b_data; 20411823cb0bSTao Ma 20421823cb0bSTao Ma le32_add_cpu(&rb->rf_clusters, -1); 20431823cb0bSTao Ma 20441823cb0bSTao Ma /* 20451823cb0bSTao Ma * check whether we need to restore the root refcount block if 20461823cb0bSTao Ma * there is no leaf extent block at atll. 20471823cb0bSTao Ma */ 20481823cb0bSTao Ma if (!rb->rf_list.l_next_free_rec) { 20491823cb0bSTao Ma BUG_ON(rb->rf_clusters); 20501823cb0bSTao Ma 20511823cb0bSTao Ma mlog(0, "reset refcount tree root %llu to be a record block.\n", 20521823cb0bSTao Ma (unsigned long long)ref_root_bh->b_blocknr); 20531823cb0bSTao Ma 20541823cb0bSTao Ma rb->rf_flags = 0; 20551823cb0bSTao Ma rb->rf_parent = 0; 20561823cb0bSTao Ma rb->rf_cpos = 0; 20571823cb0bSTao Ma memset(&rb->rf_records, 0, sb->s_blocksize - 20581823cb0bSTao Ma offsetof(struct ocfs2_refcount_block, rf_records)); 20591823cb0bSTao Ma rb->rf_records.rl_count = 20601823cb0bSTao Ma cpu_to_le16(ocfs2_refcount_recs_per_rb(sb)); 20611823cb0bSTao Ma } 20621823cb0bSTao Ma 20631823cb0bSTao Ma ocfs2_journal_dirty(handle, ref_root_bh); 20641823cb0bSTao Ma 20651823cb0bSTao Ma out: 20661823cb0bSTao Ma return ret; 20671823cb0bSTao Ma } 20681823cb0bSTao Ma 20697540c1a7STao Ma int ocfs2_increase_refcount(handle_t *handle, 20707540c1a7STao Ma struct ocfs2_caching_info *ci, 20717540c1a7STao Ma struct buffer_head *ref_root_bh, 20727540c1a7STao Ma u64 cpos, u32 len, 20737540c1a7STao Ma struct ocfs2_alloc_context *meta_ac, 20747540c1a7STao Ma struct ocfs2_cached_dealloc_ctxt *dealloc) 20757540c1a7STao Ma { 20767540c1a7STao Ma return __ocfs2_increase_refcount(handle, ci, ref_root_bh, 20777540c1a7STao Ma cpos, len, 1, 20787540c1a7STao Ma meta_ac, dealloc); 20797540c1a7STao Ma } 20807540c1a7STao Ma 20811823cb0bSTao Ma static int ocfs2_decrease_refcount_rec(handle_t *handle, 20821823cb0bSTao Ma struct ocfs2_caching_info *ci, 20831823cb0bSTao Ma struct buffer_head *ref_root_bh, 20841823cb0bSTao Ma struct buffer_head *ref_leaf_bh, 20851823cb0bSTao Ma int index, u64 cpos, unsigned int len, 20861823cb0bSTao Ma struct ocfs2_alloc_context *meta_ac, 20871823cb0bSTao Ma struct ocfs2_cached_dealloc_ctxt *dealloc) 20881823cb0bSTao Ma { 20891823cb0bSTao Ma int ret; 20901823cb0bSTao Ma struct ocfs2_refcount_block *rb = 20911823cb0bSTao Ma (struct ocfs2_refcount_block *)ref_leaf_bh->b_data; 20921823cb0bSTao Ma struct ocfs2_refcount_rec *rec = &rb->rf_records.rl_recs[index]; 20931823cb0bSTao Ma 20941823cb0bSTao Ma BUG_ON(cpos < le64_to_cpu(rec->r_cpos)); 20951823cb0bSTao Ma BUG_ON(cpos + len > 20961823cb0bSTao Ma le64_to_cpu(rec->r_cpos) + le32_to_cpu(rec->r_clusters)); 20971823cb0bSTao Ma 20981823cb0bSTao Ma if (cpos == le64_to_cpu(rec->r_cpos) && 20991823cb0bSTao Ma len == le32_to_cpu(rec->r_clusters)) 21001823cb0bSTao Ma ret = ocfs2_change_refcount_rec(handle, ci, 21017540c1a7STao Ma ref_leaf_bh, index, 1, -1); 21021823cb0bSTao Ma else { 21031823cb0bSTao Ma struct ocfs2_refcount_rec split = *rec; 21041823cb0bSTao Ma split.r_cpos = cpu_to_le64(cpos); 21051823cb0bSTao Ma split.r_clusters = cpu_to_le32(len); 21061823cb0bSTao Ma 21071823cb0bSTao Ma le32_add_cpu(&split.r_refcount, -1); 21081823cb0bSTao Ma 21091823cb0bSTao Ma mlog(0, "split refcount rec, start %llu, " 21101823cb0bSTao Ma "len %u, count %u, original start %llu, len %u\n", 21111823cb0bSTao Ma (unsigned long long)le64_to_cpu(split.r_cpos), 21121823cb0bSTao Ma len, le32_to_cpu(split.r_refcount), 21131823cb0bSTao Ma (unsigned long long)le64_to_cpu(rec->r_cpos), 21141823cb0bSTao Ma le32_to_cpu(rec->r_clusters)); 21151823cb0bSTao Ma ret = ocfs2_split_refcount_rec(handle, ci, 21161823cb0bSTao Ma ref_root_bh, ref_leaf_bh, 21177540c1a7STao Ma &split, index, 1, 21181823cb0bSTao Ma meta_ac, dealloc); 21191823cb0bSTao Ma } 21201823cb0bSTao Ma 21211823cb0bSTao Ma if (ret) { 21221823cb0bSTao Ma mlog_errno(ret); 21231823cb0bSTao Ma goto out; 21241823cb0bSTao Ma } 21251823cb0bSTao Ma 21261823cb0bSTao Ma /* Remove the leaf refcount block if it contains no refcount record. */ 21271823cb0bSTao Ma if (!rb->rf_records.rl_used && ref_leaf_bh != ref_root_bh) { 21281823cb0bSTao Ma ret = ocfs2_remove_refcount_extent(handle, ci, ref_root_bh, 21291823cb0bSTao Ma ref_leaf_bh, meta_ac, 21301823cb0bSTao Ma dealloc); 21311823cb0bSTao Ma if (ret) 21321823cb0bSTao Ma mlog_errno(ret); 21331823cb0bSTao Ma } 21341823cb0bSTao Ma 21351823cb0bSTao Ma out: 21361823cb0bSTao Ma return ret; 21371823cb0bSTao Ma } 21381823cb0bSTao Ma 21391823cb0bSTao Ma static int __ocfs2_decrease_refcount(handle_t *handle, 21401823cb0bSTao Ma struct ocfs2_caching_info *ci, 21411823cb0bSTao Ma struct buffer_head *ref_root_bh, 21421823cb0bSTao Ma u64 cpos, u32 len, 21431823cb0bSTao Ma struct ocfs2_alloc_context *meta_ac, 21446ae23c55STao Ma struct ocfs2_cached_dealloc_ctxt *dealloc, 21456ae23c55STao Ma int delete) 21461823cb0bSTao Ma { 21471823cb0bSTao Ma int ret = 0, index = 0; 21481823cb0bSTao Ma struct ocfs2_refcount_rec rec; 21491823cb0bSTao Ma unsigned int r_count = 0, r_len; 21501823cb0bSTao Ma struct super_block *sb = ocfs2_metadata_cache_get_super(ci); 21511823cb0bSTao Ma struct buffer_head *ref_leaf_bh = NULL; 21521823cb0bSTao Ma 21536ae23c55STao Ma mlog(0, "Tree owner %llu, decrease refcount start %llu, " 21546ae23c55STao Ma "len %u, delete %u\n", 21551823cb0bSTao Ma (unsigned long long)ocfs2_metadata_cache_owner(ci), 21566ae23c55STao Ma (unsigned long long)cpos, len, delete); 21571823cb0bSTao Ma 21581823cb0bSTao Ma while (len) { 21591823cb0bSTao Ma ret = ocfs2_get_refcount_rec(ci, ref_root_bh, 21601823cb0bSTao Ma cpos, len, &rec, &index, 21611823cb0bSTao Ma &ref_leaf_bh); 21621823cb0bSTao Ma if (ret) { 21631823cb0bSTao Ma mlog_errno(ret); 21641823cb0bSTao Ma goto out; 21651823cb0bSTao Ma } 21661823cb0bSTao Ma 21671823cb0bSTao Ma r_count = le32_to_cpu(rec.r_refcount); 21681823cb0bSTao Ma BUG_ON(r_count == 0); 21696ae23c55STao Ma if (!delete) 21706ae23c55STao Ma BUG_ON(r_count > 1); 21711823cb0bSTao Ma 21721823cb0bSTao Ma r_len = min((u64)(cpos + len), le64_to_cpu(rec.r_cpos) + 21731823cb0bSTao Ma le32_to_cpu(rec.r_clusters)) - cpos; 21741823cb0bSTao Ma 21751823cb0bSTao Ma ret = ocfs2_decrease_refcount_rec(handle, ci, ref_root_bh, 21761823cb0bSTao Ma ref_leaf_bh, index, 21771823cb0bSTao Ma cpos, r_len, 21781823cb0bSTao Ma meta_ac, dealloc); 21791823cb0bSTao Ma if (ret) { 21801823cb0bSTao Ma mlog_errno(ret); 21811823cb0bSTao Ma goto out; 21821823cb0bSTao Ma } 21831823cb0bSTao Ma 21846ae23c55STao Ma if (le32_to_cpu(rec.r_refcount) == 1 && delete) { 21851823cb0bSTao Ma ret = ocfs2_cache_cluster_dealloc(dealloc, 21861823cb0bSTao Ma ocfs2_clusters_to_blocks(sb, cpos), 21871823cb0bSTao Ma r_len); 21881823cb0bSTao Ma if (ret) { 21891823cb0bSTao Ma mlog_errno(ret); 21901823cb0bSTao Ma goto out; 21911823cb0bSTao Ma } 21921823cb0bSTao Ma } 21931823cb0bSTao Ma 21941823cb0bSTao Ma cpos += r_len; 21951823cb0bSTao Ma len -= r_len; 21961823cb0bSTao Ma brelse(ref_leaf_bh); 21971823cb0bSTao Ma ref_leaf_bh = NULL; 21981823cb0bSTao Ma } 21991823cb0bSTao Ma 22001823cb0bSTao Ma out: 22011823cb0bSTao Ma brelse(ref_leaf_bh); 22021823cb0bSTao Ma return ret; 22031823cb0bSTao Ma } 22041823cb0bSTao Ma 22051823cb0bSTao Ma /* Caller must hold refcount tree lock. */ 22061823cb0bSTao Ma int ocfs2_decrease_refcount(struct inode *inode, 22071823cb0bSTao Ma handle_t *handle, u32 cpos, u32 len, 22081823cb0bSTao Ma struct ocfs2_alloc_context *meta_ac, 22096ae23c55STao Ma struct ocfs2_cached_dealloc_ctxt *dealloc, 22106ae23c55STao Ma int delete) 22111823cb0bSTao Ma { 22121823cb0bSTao Ma int ret; 22131823cb0bSTao Ma u64 ref_blkno; 22141823cb0bSTao Ma struct ocfs2_inode_info *oi = OCFS2_I(inode); 22151823cb0bSTao Ma struct buffer_head *ref_root_bh = NULL; 22161823cb0bSTao Ma struct ocfs2_refcount_tree *tree; 22171823cb0bSTao Ma 22181823cb0bSTao Ma BUG_ON(!(oi->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL)); 22191823cb0bSTao Ma 22201823cb0bSTao Ma ret = ocfs2_get_refcount_block(inode, &ref_blkno); 22211823cb0bSTao Ma if (ret) { 22221823cb0bSTao Ma mlog_errno(ret); 22231823cb0bSTao Ma goto out; 22241823cb0bSTao Ma } 22251823cb0bSTao Ma 22261823cb0bSTao Ma ret = ocfs2_get_refcount_tree(OCFS2_SB(inode->i_sb), ref_blkno, &tree); 22271823cb0bSTao Ma if (ret) { 22281823cb0bSTao Ma mlog_errno(ret); 22291823cb0bSTao Ma goto out; 22301823cb0bSTao Ma } 22311823cb0bSTao Ma 22321823cb0bSTao Ma ret = ocfs2_read_refcount_block(&tree->rf_ci, tree->rf_blkno, 22331823cb0bSTao Ma &ref_root_bh); 22341823cb0bSTao Ma if (ret) { 22351823cb0bSTao Ma mlog_errno(ret); 22361823cb0bSTao Ma goto out; 22371823cb0bSTao Ma } 22381823cb0bSTao Ma 22391823cb0bSTao Ma ret = __ocfs2_decrease_refcount(handle, &tree->rf_ci, ref_root_bh, 22406ae23c55STao Ma cpos, len, meta_ac, dealloc, delete); 22411823cb0bSTao Ma if (ret) 22421823cb0bSTao Ma mlog_errno(ret); 22431823cb0bSTao Ma out: 22441823cb0bSTao Ma brelse(ref_root_bh); 22451823cb0bSTao Ma return ret; 22461823cb0bSTao Ma } 22471aa75feaSTao Ma 22481aa75feaSTao Ma /* 22491aa75feaSTao Ma * Mark the already-existing extent at cpos as refcounted for len clusters. 22501aa75feaSTao Ma * This adds the refcount extent flag. 22511aa75feaSTao Ma * 22521aa75feaSTao Ma * If the existing extent is larger than the request, initiate a 22531aa75feaSTao Ma * split. An attempt will be made at merging with adjacent extents. 22541aa75feaSTao Ma * 22551aa75feaSTao Ma * The caller is responsible for passing down meta_ac if we'll need it. 22561aa75feaSTao Ma */ 22571aa75feaSTao Ma static int ocfs2_mark_extent_refcounted(struct inode *inode, 22581aa75feaSTao Ma struct ocfs2_extent_tree *et, 22591aa75feaSTao Ma handle_t *handle, u32 cpos, 22601aa75feaSTao Ma u32 len, u32 phys, 22611aa75feaSTao Ma struct ocfs2_alloc_context *meta_ac, 22621aa75feaSTao Ma struct ocfs2_cached_dealloc_ctxt *dealloc) 22631aa75feaSTao Ma { 22641aa75feaSTao Ma int ret; 22651aa75feaSTao Ma 22661aa75feaSTao Ma mlog(0, "Inode %lu refcount tree cpos %u, len %u, phys cluster %u\n", 22671aa75feaSTao Ma inode->i_ino, cpos, len, phys); 22681aa75feaSTao Ma 22691aa75feaSTao Ma if (!ocfs2_refcount_tree(OCFS2_SB(inode->i_sb))) { 22701aa75feaSTao Ma ocfs2_error(inode->i_sb, "Inode %lu want to use refcount " 22711aa75feaSTao Ma "tree, but the feature bit is not set in the " 22721aa75feaSTao Ma "super block.", inode->i_ino); 22731aa75feaSTao Ma ret = -EROFS; 22741aa75feaSTao Ma goto out; 22751aa75feaSTao Ma } 22761aa75feaSTao Ma 22771aa75feaSTao Ma ret = ocfs2_change_extent_flag(handle, et, cpos, 22781aa75feaSTao Ma len, phys, meta_ac, dealloc, 22791aa75feaSTao Ma OCFS2_EXT_REFCOUNTED, 0); 22801aa75feaSTao Ma if (ret) 22811aa75feaSTao Ma mlog_errno(ret); 22821aa75feaSTao Ma 22831aa75feaSTao Ma out: 22841aa75feaSTao Ma return ret; 22851aa75feaSTao Ma } 2286bcbbb24aSTao Ma 2287bcbbb24aSTao Ma /* 2288bcbbb24aSTao Ma * Given some contiguous physical clusters, calculate what we need 2289bcbbb24aSTao Ma * for modifying their refcount. 2290bcbbb24aSTao Ma */ 2291bcbbb24aSTao Ma static int ocfs2_calc_refcount_meta_credits(struct super_block *sb, 2292bcbbb24aSTao Ma struct ocfs2_caching_info *ci, 2293bcbbb24aSTao Ma struct buffer_head *ref_root_bh, 2294bcbbb24aSTao Ma u64 start_cpos, 2295bcbbb24aSTao Ma u32 clusters, 2296bcbbb24aSTao Ma int *meta_add, 2297bcbbb24aSTao Ma int *credits) 2298bcbbb24aSTao Ma { 2299bcbbb24aSTao Ma int ret = 0, index, ref_blocks = 0, recs_add = 0; 2300bcbbb24aSTao Ma u64 cpos = start_cpos; 2301bcbbb24aSTao Ma struct ocfs2_refcount_block *rb; 2302bcbbb24aSTao Ma struct ocfs2_refcount_rec rec; 2303bcbbb24aSTao Ma struct buffer_head *ref_leaf_bh = NULL, *prev_bh = NULL; 2304bcbbb24aSTao Ma u32 len; 2305bcbbb24aSTao Ma 2306bcbbb24aSTao Ma mlog(0, "start_cpos %llu, clusters %u\n", 2307bcbbb24aSTao Ma (unsigned long long)start_cpos, clusters); 2308bcbbb24aSTao Ma while (clusters) { 2309bcbbb24aSTao Ma ret = ocfs2_get_refcount_rec(ci, ref_root_bh, 2310bcbbb24aSTao Ma cpos, clusters, &rec, 2311bcbbb24aSTao Ma &index, &ref_leaf_bh); 2312bcbbb24aSTao Ma if (ret) { 2313bcbbb24aSTao Ma mlog_errno(ret); 2314bcbbb24aSTao Ma goto out; 2315bcbbb24aSTao Ma } 2316bcbbb24aSTao Ma 2317bcbbb24aSTao Ma if (ref_leaf_bh != prev_bh) { 2318bcbbb24aSTao Ma /* 2319bcbbb24aSTao Ma * Now we encounter a new leaf block, so calculate 2320bcbbb24aSTao Ma * whether we need to extend the old leaf. 2321bcbbb24aSTao Ma */ 2322bcbbb24aSTao Ma if (prev_bh) { 2323bcbbb24aSTao Ma rb = (struct ocfs2_refcount_block *) 2324bcbbb24aSTao Ma prev_bh->b_data; 2325bcbbb24aSTao Ma 2326bcbbb24aSTao Ma if (le64_to_cpu(rb->rf_records.rl_used) + 2327bcbbb24aSTao Ma recs_add > 2328bcbbb24aSTao Ma le16_to_cpu(rb->rf_records.rl_count)) 2329bcbbb24aSTao Ma ref_blocks++; 2330bcbbb24aSTao Ma } 2331bcbbb24aSTao Ma 2332bcbbb24aSTao Ma recs_add = 0; 2333bcbbb24aSTao Ma *credits += 1; 2334bcbbb24aSTao Ma brelse(prev_bh); 2335bcbbb24aSTao Ma prev_bh = ref_leaf_bh; 2336bcbbb24aSTao Ma get_bh(prev_bh); 2337bcbbb24aSTao Ma } 2338bcbbb24aSTao Ma 2339bcbbb24aSTao Ma rb = (struct ocfs2_refcount_block *)ref_leaf_bh->b_data; 2340bcbbb24aSTao Ma 2341bcbbb24aSTao Ma mlog(0, "recs_add %d,cpos %llu, clusters %u, rec->r_cpos %llu," 2342bcbbb24aSTao Ma "rec->r_clusters %u, rec->r_refcount %u, index %d\n", 2343bcbbb24aSTao Ma recs_add, (unsigned long long)cpos, clusters, 2344bcbbb24aSTao Ma (unsigned long long)le64_to_cpu(rec.r_cpos), 2345bcbbb24aSTao Ma le32_to_cpu(rec.r_clusters), 2346bcbbb24aSTao Ma le32_to_cpu(rec.r_refcount), index); 2347bcbbb24aSTao Ma 2348bcbbb24aSTao Ma len = min((u64)cpos + clusters, le64_to_cpu(rec.r_cpos) + 2349bcbbb24aSTao Ma le32_to_cpu(rec.r_clusters)) - cpos; 2350bcbbb24aSTao Ma /* 2351bcbbb24aSTao Ma * If the refcount rec already exist, cool. We just need 2352bcbbb24aSTao Ma * to check whether there is a split. Otherwise we just need 2353bcbbb24aSTao Ma * to increase the refcount. 2354bcbbb24aSTao Ma * If we will insert one, increases recs_add. 2355bcbbb24aSTao Ma * 2356bcbbb24aSTao Ma * We record all the records which will be inserted to the 2357bcbbb24aSTao Ma * same refcount block, so that we can tell exactly whether 2358bcbbb24aSTao Ma * we need a new refcount block or not. 2359bcbbb24aSTao Ma */ 2360bcbbb24aSTao Ma if (rec.r_refcount) { 2361bcbbb24aSTao Ma /* Check whether we need a split at the beginning. */ 2362bcbbb24aSTao Ma if (cpos == start_cpos && 2363bcbbb24aSTao Ma cpos != le64_to_cpu(rec.r_cpos)) 2364bcbbb24aSTao Ma recs_add++; 2365bcbbb24aSTao Ma 2366bcbbb24aSTao Ma /* Check whether we need a split in the end. */ 2367bcbbb24aSTao Ma if (cpos + clusters < le64_to_cpu(rec.r_cpos) + 2368bcbbb24aSTao Ma le32_to_cpu(rec.r_clusters)) 2369bcbbb24aSTao Ma recs_add++; 2370bcbbb24aSTao Ma } else 2371bcbbb24aSTao Ma recs_add++; 2372bcbbb24aSTao Ma 2373bcbbb24aSTao Ma brelse(ref_leaf_bh); 2374bcbbb24aSTao Ma ref_leaf_bh = NULL; 2375bcbbb24aSTao Ma clusters -= len; 2376bcbbb24aSTao Ma cpos += len; 2377bcbbb24aSTao Ma } 2378bcbbb24aSTao Ma 2379bcbbb24aSTao Ma if (prev_bh) { 2380bcbbb24aSTao Ma rb = (struct ocfs2_refcount_block *)prev_bh->b_data; 2381bcbbb24aSTao Ma 2382bcbbb24aSTao Ma if (le64_to_cpu(rb->rf_records.rl_used) + recs_add > 2383bcbbb24aSTao Ma le16_to_cpu(rb->rf_records.rl_count)) 2384bcbbb24aSTao Ma ref_blocks++; 2385bcbbb24aSTao Ma 2386bcbbb24aSTao Ma *credits += 1; 2387bcbbb24aSTao Ma } 2388bcbbb24aSTao Ma 2389bcbbb24aSTao Ma if (!ref_blocks) 2390bcbbb24aSTao Ma goto out; 2391bcbbb24aSTao Ma 2392bcbbb24aSTao Ma mlog(0, "we need ref_blocks %d\n", ref_blocks); 2393bcbbb24aSTao Ma *meta_add += ref_blocks; 2394bcbbb24aSTao Ma *credits += ref_blocks; 2395bcbbb24aSTao Ma 2396bcbbb24aSTao Ma /* 2397bcbbb24aSTao Ma * So we may need ref_blocks to insert into the tree. 2398bcbbb24aSTao Ma * That also means we need to change the b-tree and add that number 2399bcbbb24aSTao Ma * of records since we never merge them. 2400bcbbb24aSTao Ma * We need one more block for expansion since the new created leaf 2401bcbbb24aSTao Ma * block is also full and needs split. 2402bcbbb24aSTao Ma */ 2403bcbbb24aSTao Ma rb = (struct ocfs2_refcount_block *)ref_root_bh->b_data; 2404bcbbb24aSTao Ma if (le32_to_cpu(rb->rf_flags) & OCFS2_REFCOUNT_TREE_FL) { 2405bcbbb24aSTao Ma struct ocfs2_extent_tree et; 2406bcbbb24aSTao Ma 2407bcbbb24aSTao Ma ocfs2_init_refcount_extent_tree(&et, ci, ref_root_bh); 2408bcbbb24aSTao Ma *meta_add += ocfs2_extend_meta_needed(et.et_root_el); 2409bcbbb24aSTao Ma *credits += ocfs2_calc_extend_credits(sb, 2410bcbbb24aSTao Ma et.et_root_el, 2411bcbbb24aSTao Ma ref_blocks); 2412bcbbb24aSTao Ma } else { 2413bcbbb24aSTao Ma *credits += OCFS2_EXPAND_REFCOUNT_TREE_CREDITS; 2414bcbbb24aSTao Ma *meta_add += 1; 2415bcbbb24aSTao Ma } 2416bcbbb24aSTao Ma 2417bcbbb24aSTao Ma out: 2418bcbbb24aSTao Ma brelse(ref_leaf_bh); 2419bcbbb24aSTao Ma brelse(prev_bh); 2420bcbbb24aSTao Ma return ret; 2421bcbbb24aSTao Ma } 2422bcbbb24aSTao Ma 2423bcbbb24aSTao Ma /* 2424bcbbb24aSTao Ma * For refcount tree, we will decrease some contiguous clusters 2425bcbbb24aSTao Ma * refcount count, so just go through it to see how many blocks 2426bcbbb24aSTao Ma * we gonna touch and whether we need to create new blocks. 2427bcbbb24aSTao Ma * 2428bcbbb24aSTao Ma * Normally the refcount blocks store these refcount should be 2429bcbbb24aSTao Ma * continguous also, so that we can get the number easily. 2430bcbbb24aSTao Ma * As for meta_ac, we will at most add split 2 refcount record and 2431bcbbb24aSTao Ma * 2 more refcount block, so just check it in a rough way. 2432bcbbb24aSTao Ma * 2433bcbbb24aSTao Ma * Caller must hold refcount tree lock. 2434bcbbb24aSTao Ma */ 2435bcbbb24aSTao Ma int ocfs2_prepare_refcount_change_for_del(struct inode *inode, 2436bcbbb24aSTao Ma struct buffer_head *di_bh, 2437bcbbb24aSTao Ma u64 phys_blkno, 2438bcbbb24aSTao Ma u32 clusters, 2439bcbbb24aSTao Ma int *credits, 2440bcbbb24aSTao Ma struct ocfs2_alloc_context **meta_ac) 2441bcbbb24aSTao Ma { 2442bcbbb24aSTao Ma int ret, ref_blocks = 0; 2443bcbbb24aSTao Ma struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; 2444bcbbb24aSTao Ma struct ocfs2_inode_info *oi = OCFS2_I(inode); 2445bcbbb24aSTao Ma struct buffer_head *ref_root_bh = NULL; 2446bcbbb24aSTao Ma struct ocfs2_refcount_tree *tree; 2447bcbbb24aSTao Ma u64 start_cpos = ocfs2_blocks_to_clusters(inode->i_sb, phys_blkno); 2448bcbbb24aSTao Ma 2449bcbbb24aSTao Ma if (!ocfs2_refcount_tree(OCFS2_SB(inode->i_sb))) { 2450bcbbb24aSTao Ma ocfs2_error(inode->i_sb, "Inode %lu want to use refcount " 2451bcbbb24aSTao Ma "tree, but the feature bit is not set in the " 2452bcbbb24aSTao Ma "super block.", inode->i_ino); 2453bcbbb24aSTao Ma ret = -EROFS; 2454bcbbb24aSTao Ma goto out; 2455bcbbb24aSTao Ma } 2456bcbbb24aSTao Ma 2457bcbbb24aSTao Ma BUG_ON(!(oi->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL)); 2458bcbbb24aSTao Ma 2459bcbbb24aSTao Ma ret = ocfs2_get_refcount_tree(OCFS2_SB(inode->i_sb), 2460bcbbb24aSTao Ma le64_to_cpu(di->i_refcount_loc), &tree); 2461bcbbb24aSTao Ma if (ret) { 2462bcbbb24aSTao Ma mlog_errno(ret); 2463bcbbb24aSTao Ma goto out; 2464bcbbb24aSTao Ma } 2465bcbbb24aSTao Ma 2466bcbbb24aSTao Ma ret = ocfs2_read_refcount_block(&tree->rf_ci, 2467bcbbb24aSTao Ma le64_to_cpu(di->i_refcount_loc), 2468bcbbb24aSTao Ma &ref_root_bh); 2469bcbbb24aSTao Ma if (ret) { 2470bcbbb24aSTao Ma mlog_errno(ret); 2471bcbbb24aSTao Ma goto out; 2472bcbbb24aSTao Ma } 2473bcbbb24aSTao Ma 2474bcbbb24aSTao Ma ret = ocfs2_calc_refcount_meta_credits(inode->i_sb, 2475bcbbb24aSTao Ma &tree->rf_ci, 2476bcbbb24aSTao Ma ref_root_bh, 2477bcbbb24aSTao Ma start_cpos, clusters, 2478bcbbb24aSTao Ma &ref_blocks, credits); 2479bcbbb24aSTao Ma if (ret) { 2480bcbbb24aSTao Ma mlog_errno(ret); 2481bcbbb24aSTao Ma goto out; 2482bcbbb24aSTao Ma } 2483bcbbb24aSTao Ma 2484bcbbb24aSTao Ma mlog(0, "reserve new metadata %d, credits = %d\n", 2485bcbbb24aSTao Ma ref_blocks, *credits); 2486bcbbb24aSTao Ma 2487bcbbb24aSTao Ma if (ref_blocks) { 2488bcbbb24aSTao Ma ret = ocfs2_reserve_new_metadata_blocks(OCFS2_SB(inode->i_sb), 2489bcbbb24aSTao Ma ref_blocks, meta_ac); 2490bcbbb24aSTao Ma if (ret) 2491bcbbb24aSTao Ma mlog_errno(ret); 2492bcbbb24aSTao Ma } 2493bcbbb24aSTao Ma 2494bcbbb24aSTao Ma out: 2495bcbbb24aSTao Ma brelse(ref_root_bh); 2496bcbbb24aSTao Ma return ret; 2497bcbbb24aSTao Ma } 24986f70fa51STao Ma 24996f70fa51STao Ma #define MAX_CONTIG_BYTES 1048576 25006f70fa51STao Ma 25016f70fa51STao Ma static inline unsigned int ocfs2_cow_contig_clusters(struct super_block *sb) 25026f70fa51STao Ma { 25036f70fa51STao Ma return ocfs2_clusters_for_bytes(sb, MAX_CONTIG_BYTES); 25046f70fa51STao Ma } 25056f70fa51STao Ma 25066f70fa51STao Ma static inline unsigned int ocfs2_cow_contig_mask(struct super_block *sb) 25076f70fa51STao Ma { 25086f70fa51STao Ma return ~(ocfs2_cow_contig_clusters(sb) - 1); 25096f70fa51STao Ma } 25106f70fa51STao Ma 25116f70fa51STao Ma /* 25126f70fa51STao Ma * Given an extent that starts at 'start' and an I/O that starts at 'cpos', 25136f70fa51STao Ma * find an offset (start + (n * contig_clusters)) that is closest to cpos 25146f70fa51STao Ma * while still being less than or equal to it. 25156f70fa51STao Ma * 25166f70fa51STao Ma * The goal is to break the extent at a multiple of contig_clusters. 25176f70fa51STao Ma */ 25186f70fa51STao Ma static inline unsigned int ocfs2_cow_align_start(struct super_block *sb, 25196f70fa51STao Ma unsigned int start, 25206f70fa51STao Ma unsigned int cpos) 25216f70fa51STao Ma { 25226f70fa51STao Ma BUG_ON(start > cpos); 25236f70fa51STao Ma 25246f70fa51STao Ma return start + ((cpos - start) & ocfs2_cow_contig_mask(sb)); 25256f70fa51STao Ma } 25266f70fa51STao Ma 25276f70fa51STao Ma /* 25286f70fa51STao Ma * Given a cluster count of len, pad it out so that it is a multiple 25296f70fa51STao Ma * of contig_clusters. 25306f70fa51STao Ma */ 25316f70fa51STao Ma static inline unsigned int ocfs2_cow_align_length(struct super_block *sb, 25326f70fa51STao Ma unsigned int len) 25336f70fa51STao Ma { 25346f70fa51STao Ma unsigned int padded = 25356f70fa51STao Ma (len + (ocfs2_cow_contig_clusters(sb) - 1)) & 25366f70fa51STao Ma ocfs2_cow_contig_mask(sb); 25376f70fa51STao Ma 25386f70fa51STao Ma /* Did we wrap? */ 25396f70fa51STao Ma if (padded < len) 25406f70fa51STao Ma padded = UINT_MAX; 25416f70fa51STao Ma 25426f70fa51STao Ma return padded; 25436f70fa51STao Ma } 25446f70fa51STao Ma 25456f70fa51STao Ma /* 25466f70fa51STao Ma * Calculate out the start and number of virtual clusters we need to to CoW. 25476f70fa51STao Ma * 25486f70fa51STao Ma * cpos is vitual start cluster position we want to do CoW in a 25496f70fa51STao Ma * file and write_len is the cluster length. 255037f8a2bfSTao Ma * max_cpos is the place where we want to stop CoW intentionally. 25516f70fa51STao Ma * 25526f70fa51STao Ma * Normal we will start CoW from the beginning of extent record cotaining cpos. 25536f70fa51STao Ma * We try to break up extents on boundaries of MAX_CONTIG_BYTES so that we 25546f70fa51STao Ma * get good I/O from the resulting extent tree. 25556f70fa51STao Ma */ 25566f70fa51STao Ma static int ocfs2_refcount_cal_cow_clusters(struct inode *inode, 2557913580b4STao Ma struct ocfs2_extent_list *el, 25586f70fa51STao Ma u32 cpos, 25596f70fa51STao Ma u32 write_len, 256037f8a2bfSTao Ma u32 max_cpos, 25616f70fa51STao Ma u32 *cow_start, 25626f70fa51STao Ma u32 *cow_len) 25636f70fa51STao Ma { 25646f70fa51STao Ma int ret = 0; 25656f70fa51STao Ma int tree_height = le16_to_cpu(el->l_tree_depth), i; 25666f70fa51STao Ma struct buffer_head *eb_bh = NULL; 25676f70fa51STao Ma struct ocfs2_extent_block *eb = NULL; 25686f70fa51STao Ma struct ocfs2_extent_rec *rec; 25696f70fa51STao Ma unsigned int want_clusters, rec_end = 0; 25706f70fa51STao Ma int contig_clusters = ocfs2_cow_contig_clusters(inode->i_sb); 25716f70fa51STao Ma int leaf_clusters; 25726f70fa51STao Ma 257337f8a2bfSTao Ma BUG_ON(cpos + write_len > max_cpos); 257437f8a2bfSTao Ma 25756f70fa51STao Ma if (tree_height > 0) { 25766f70fa51STao Ma ret = ocfs2_find_leaf(INODE_CACHE(inode), el, cpos, &eb_bh); 25776f70fa51STao Ma if (ret) { 25786f70fa51STao Ma mlog_errno(ret); 25796f70fa51STao Ma goto out; 25806f70fa51STao Ma } 25816f70fa51STao Ma 25826f70fa51STao Ma eb = (struct ocfs2_extent_block *) eb_bh->b_data; 25836f70fa51STao Ma el = &eb->h_list; 25846f70fa51STao Ma 25856f70fa51STao Ma if (el->l_tree_depth) { 25866f70fa51STao Ma ocfs2_error(inode->i_sb, 25876f70fa51STao Ma "Inode %lu has non zero tree depth in " 25886f70fa51STao Ma "leaf block %llu\n", inode->i_ino, 25896f70fa51STao Ma (unsigned long long)eb_bh->b_blocknr); 25906f70fa51STao Ma ret = -EROFS; 25916f70fa51STao Ma goto out; 25926f70fa51STao Ma } 25936f70fa51STao Ma } 25946f70fa51STao Ma 25956f70fa51STao Ma *cow_len = 0; 25966f70fa51STao Ma for (i = 0; i < le16_to_cpu(el->l_next_free_rec); i++) { 25976f70fa51STao Ma rec = &el->l_recs[i]; 25986f70fa51STao Ma 25996f70fa51STao Ma if (ocfs2_is_empty_extent(rec)) { 26006f70fa51STao Ma mlog_bug_on_msg(i != 0, "Inode %lu has empty record in " 26016f70fa51STao Ma "index %d\n", inode->i_ino, i); 26026f70fa51STao Ma continue; 26036f70fa51STao Ma } 26046f70fa51STao Ma 26056f70fa51STao Ma if (le32_to_cpu(rec->e_cpos) + 26066f70fa51STao Ma le16_to_cpu(rec->e_leaf_clusters) <= cpos) 26076f70fa51STao Ma continue; 26086f70fa51STao Ma 26096f70fa51STao Ma if (*cow_len == 0) { 26106f70fa51STao Ma /* 26116f70fa51STao Ma * We should find a refcounted record in the 26126f70fa51STao Ma * first pass. 26136f70fa51STao Ma */ 26146f70fa51STao Ma BUG_ON(!(rec->e_flags & OCFS2_EXT_REFCOUNTED)); 26156f70fa51STao Ma *cow_start = le32_to_cpu(rec->e_cpos); 26166f70fa51STao Ma } 26176f70fa51STao Ma 26186f70fa51STao Ma /* 261937f8a2bfSTao Ma * If we encounter a hole, a non-refcounted record or 262037f8a2bfSTao Ma * pass the max_cpos, stop the search. 26216f70fa51STao Ma */ 26226f70fa51STao Ma if ((!(rec->e_flags & OCFS2_EXT_REFCOUNTED)) || 262337f8a2bfSTao Ma (*cow_len && rec_end != le32_to_cpu(rec->e_cpos)) || 262437f8a2bfSTao Ma (max_cpos <= le32_to_cpu(rec->e_cpos))) 26256f70fa51STao Ma break; 26266f70fa51STao Ma 26276f70fa51STao Ma leaf_clusters = le16_to_cpu(rec->e_leaf_clusters); 26286f70fa51STao Ma rec_end = le32_to_cpu(rec->e_cpos) + leaf_clusters; 262937f8a2bfSTao Ma if (rec_end > max_cpos) { 263037f8a2bfSTao Ma rec_end = max_cpos; 263137f8a2bfSTao Ma leaf_clusters = rec_end - le32_to_cpu(rec->e_cpos); 263237f8a2bfSTao Ma } 26336f70fa51STao Ma 26346f70fa51STao Ma /* 26356f70fa51STao Ma * How many clusters do we actually need from 26366f70fa51STao Ma * this extent? First we see how many we actually 26376f70fa51STao Ma * need to complete the write. If that's smaller 26386f70fa51STao Ma * than contig_clusters, we try for contig_clusters. 26396f70fa51STao Ma */ 26406f70fa51STao Ma if (!*cow_len) 26416f70fa51STao Ma want_clusters = write_len; 26426f70fa51STao Ma else 26436f70fa51STao Ma want_clusters = (cpos + write_len) - 26446f70fa51STao Ma (*cow_start + *cow_len); 26456f70fa51STao Ma if (want_clusters < contig_clusters) 26466f70fa51STao Ma want_clusters = contig_clusters; 26476f70fa51STao Ma 26486f70fa51STao Ma /* 26496f70fa51STao Ma * If the write does not cover the whole extent, we 26506f70fa51STao Ma * need to calculate how we're going to split the extent. 26516f70fa51STao Ma * We try to do it on contig_clusters boundaries. 26526f70fa51STao Ma * 26536f70fa51STao Ma * Any extent smaller than contig_clusters will be 26546f70fa51STao Ma * CoWed in its entirety. 26556f70fa51STao Ma */ 26566f70fa51STao Ma if (leaf_clusters <= contig_clusters) 26576f70fa51STao Ma *cow_len += leaf_clusters; 26586f70fa51STao Ma else if (*cow_len || (*cow_start == cpos)) { 26596f70fa51STao Ma /* 26606f70fa51STao Ma * This extent needs to be CoW'd from its 26616f70fa51STao Ma * beginning, so all we have to do is compute 26626f70fa51STao Ma * how many clusters to grab. We align 26636f70fa51STao Ma * want_clusters to the edge of contig_clusters 26646f70fa51STao Ma * to get better I/O. 26656f70fa51STao Ma */ 26666f70fa51STao Ma want_clusters = ocfs2_cow_align_length(inode->i_sb, 26676f70fa51STao Ma want_clusters); 26686f70fa51STao Ma 26696f70fa51STao Ma if (leaf_clusters < want_clusters) 26706f70fa51STao Ma *cow_len += leaf_clusters; 26716f70fa51STao Ma else 26726f70fa51STao Ma *cow_len += want_clusters; 26736f70fa51STao Ma } else if ((*cow_start + contig_clusters) >= 26746f70fa51STao Ma (cpos + write_len)) { 26756f70fa51STao Ma /* 26766f70fa51STao Ma * Breaking off contig_clusters at the front 26776f70fa51STao Ma * of the extent will cover our write. That's 26786f70fa51STao Ma * easy. 26796f70fa51STao Ma */ 26806f70fa51STao Ma *cow_len = contig_clusters; 26816f70fa51STao Ma } else if ((rec_end - cpos) <= contig_clusters) { 26826f70fa51STao Ma /* 26836f70fa51STao Ma * Breaking off contig_clusters at the tail of 26846f70fa51STao Ma * this extent will cover cpos. 26856f70fa51STao Ma */ 26866f70fa51STao Ma *cow_start = rec_end - contig_clusters; 26876f70fa51STao Ma *cow_len = contig_clusters; 26886f70fa51STao Ma } else if ((rec_end - cpos) <= want_clusters) { 26896f70fa51STao Ma /* 26906f70fa51STao Ma * While we can't fit the entire write in this 26916f70fa51STao Ma * extent, we know that the write goes from cpos 26926f70fa51STao Ma * to the end of the extent. Break that off. 26936f70fa51STao Ma * We try to break it at some multiple of 26946f70fa51STao Ma * contig_clusters from the front of the extent. 26956f70fa51STao Ma * Failing that (ie, cpos is within 26966f70fa51STao Ma * contig_clusters of the front), we'll CoW the 26976f70fa51STao Ma * entire extent. 26986f70fa51STao Ma */ 26996f70fa51STao Ma *cow_start = ocfs2_cow_align_start(inode->i_sb, 27006f70fa51STao Ma *cow_start, cpos); 27016f70fa51STao Ma *cow_len = rec_end - *cow_start; 27026f70fa51STao Ma } else { 27036f70fa51STao Ma /* 27046f70fa51STao Ma * Ok, the entire write lives in the middle of 27056f70fa51STao Ma * this extent. Let's try to slice the extent up 27066f70fa51STao Ma * nicely. Optimally, our CoW region starts at 27076f70fa51STao Ma * m*contig_clusters from the beginning of the 27086f70fa51STao Ma * extent and goes for n*contig_clusters, 27096f70fa51STao Ma * covering the entire write. 27106f70fa51STao Ma */ 27116f70fa51STao Ma *cow_start = ocfs2_cow_align_start(inode->i_sb, 27126f70fa51STao Ma *cow_start, cpos); 27136f70fa51STao Ma 27146f70fa51STao Ma want_clusters = (cpos + write_len) - *cow_start; 27156f70fa51STao Ma want_clusters = ocfs2_cow_align_length(inode->i_sb, 27166f70fa51STao Ma want_clusters); 27176f70fa51STao Ma if (*cow_start + want_clusters <= rec_end) 27186f70fa51STao Ma *cow_len = want_clusters; 27196f70fa51STao Ma else 27206f70fa51STao Ma *cow_len = rec_end - *cow_start; 27216f70fa51STao Ma } 27226f70fa51STao Ma 27236f70fa51STao Ma /* Have we covered our entire write yet? */ 27246f70fa51STao Ma if ((*cow_start + *cow_len) >= (cpos + write_len)) 27256f70fa51STao Ma break; 27266f70fa51STao Ma 27276f70fa51STao Ma /* 27286f70fa51STao Ma * If we reach the end of the extent block and don't get enough 27296f70fa51STao Ma * clusters, continue with the next extent block if possible. 27306f70fa51STao Ma */ 27316f70fa51STao Ma if (i + 1 == le16_to_cpu(el->l_next_free_rec) && 27326f70fa51STao Ma eb && eb->h_next_leaf_blk) { 27336f70fa51STao Ma brelse(eb_bh); 27346f70fa51STao Ma eb_bh = NULL; 27356f70fa51STao Ma 27366f70fa51STao Ma ret = ocfs2_read_extent_block(INODE_CACHE(inode), 27376f70fa51STao Ma le64_to_cpu(eb->h_next_leaf_blk), 27386f70fa51STao Ma &eb_bh); 27396f70fa51STao Ma if (ret) { 27406f70fa51STao Ma mlog_errno(ret); 27416f70fa51STao Ma goto out; 27426f70fa51STao Ma } 27436f70fa51STao Ma 27446f70fa51STao Ma eb = (struct ocfs2_extent_block *) eb_bh->b_data; 27456f70fa51STao Ma el = &eb->h_list; 27466f70fa51STao Ma i = -1; 27476f70fa51STao Ma } 27486f70fa51STao Ma } 27496f70fa51STao Ma 27506f70fa51STao Ma out: 27516f70fa51STao Ma brelse(eb_bh); 27526f70fa51STao Ma return ret; 27536f70fa51STao Ma } 27546f70fa51STao Ma 27556f70fa51STao Ma /* 27566f70fa51STao Ma * Prepare meta_ac, data_ac and calculate credits when we want to add some 27576f70fa51STao Ma * num_clusters in data_tree "et" and change the refcount for the old 27586f70fa51STao Ma * clusters(starting form p_cluster) in the refcount tree. 27596f70fa51STao Ma * 27606f70fa51STao Ma * Note: 27616f70fa51STao Ma * 1. since we may split the old tree, so we at most will need num_clusters + 2 27626f70fa51STao Ma * more new leaf records. 27636f70fa51STao Ma * 2. In some case, we may not need to reserve new clusters(e.g, reflink), so 27646f70fa51STao Ma * just give data_ac = NULL. 27656f70fa51STao Ma */ 27666f70fa51STao Ma static int ocfs2_lock_refcount_allocators(struct super_block *sb, 27676f70fa51STao Ma u32 p_cluster, u32 num_clusters, 27686f70fa51STao Ma struct ocfs2_extent_tree *et, 27696f70fa51STao Ma struct ocfs2_caching_info *ref_ci, 27706f70fa51STao Ma struct buffer_head *ref_root_bh, 27716f70fa51STao Ma struct ocfs2_alloc_context **meta_ac, 27726f70fa51STao Ma struct ocfs2_alloc_context **data_ac, 27736f70fa51STao Ma int *credits) 27746f70fa51STao Ma { 27756f70fa51STao Ma int ret = 0, meta_add = 0; 27766f70fa51STao Ma int num_free_extents = ocfs2_num_free_extents(OCFS2_SB(sb), et); 27776f70fa51STao Ma 27786f70fa51STao Ma if (num_free_extents < 0) { 27796f70fa51STao Ma ret = num_free_extents; 27806f70fa51STao Ma mlog_errno(ret); 27816f70fa51STao Ma goto out; 27826f70fa51STao Ma } 27836f70fa51STao Ma 27846f70fa51STao Ma if (num_free_extents < num_clusters + 2) 27856f70fa51STao Ma meta_add = 27866f70fa51STao Ma ocfs2_extend_meta_needed(et->et_root_el); 27876f70fa51STao Ma 27886f70fa51STao Ma *credits += ocfs2_calc_extend_credits(sb, et->et_root_el, 27896f70fa51STao Ma num_clusters + 2); 27906f70fa51STao Ma 27916f70fa51STao Ma ret = ocfs2_calc_refcount_meta_credits(sb, ref_ci, ref_root_bh, 27926f70fa51STao Ma p_cluster, num_clusters, 27936f70fa51STao Ma &meta_add, credits); 27946f70fa51STao Ma if (ret) { 27956f70fa51STao Ma mlog_errno(ret); 27966f70fa51STao Ma goto out; 27976f70fa51STao Ma } 27986f70fa51STao Ma 27996f70fa51STao Ma mlog(0, "reserve new metadata %d, clusters %u, credits = %d\n", 28006f70fa51STao Ma meta_add, num_clusters, *credits); 28016f70fa51STao Ma ret = ocfs2_reserve_new_metadata_blocks(OCFS2_SB(sb), meta_add, 28026f70fa51STao Ma meta_ac); 28036f70fa51STao Ma if (ret) { 28046f70fa51STao Ma mlog_errno(ret); 28056f70fa51STao Ma goto out; 28066f70fa51STao Ma } 28076f70fa51STao Ma 28086f70fa51STao Ma if (data_ac) { 28096f70fa51STao Ma ret = ocfs2_reserve_clusters(OCFS2_SB(sb), num_clusters, 28106f70fa51STao Ma data_ac); 28116f70fa51STao Ma if (ret) 28126f70fa51STao Ma mlog_errno(ret); 28136f70fa51STao Ma } 28146f70fa51STao Ma 28156f70fa51STao Ma out: 28166f70fa51STao Ma if (ret) { 28176f70fa51STao Ma if (*meta_ac) { 28186f70fa51STao Ma ocfs2_free_alloc_context(*meta_ac); 28196f70fa51STao Ma *meta_ac = NULL; 28206f70fa51STao Ma } 28216f70fa51STao Ma } 28226f70fa51STao Ma 28236f70fa51STao Ma return ret; 28246f70fa51STao Ma } 28256f70fa51STao Ma 28266f70fa51STao Ma static int ocfs2_clear_cow_buffer(handle_t *handle, struct buffer_head *bh) 28276f70fa51STao Ma { 28286f70fa51STao Ma BUG_ON(buffer_dirty(bh)); 28296f70fa51STao Ma 28306f70fa51STao Ma clear_buffer_mapped(bh); 28316f70fa51STao Ma 28326f70fa51STao Ma return 0; 28336f70fa51STao Ma } 28346f70fa51STao Ma 2835913580b4STao Ma static int ocfs2_duplicate_clusters_by_page(handle_t *handle, 28366f70fa51STao Ma struct ocfs2_cow_context *context, 28376f70fa51STao Ma u32 cpos, u32 old_cluster, 28386f70fa51STao Ma u32 new_cluster, u32 new_len) 28396f70fa51STao Ma { 28406f70fa51STao Ma int ret = 0, partial; 2841913580b4STao Ma struct ocfs2_caching_info *ci = context->data_et.et_ci; 28426f70fa51STao Ma struct super_block *sb = ocfs2_metadata_cache_get_super(ci); 28436f70fa51STao Ma u64 new_block = ocfs2_clusters_to_blocks(sb, new_cluster); 28446f70fa51STao Ma struct page *page; 28456f70fa51STao Ma pgoff_t page_index; 28466f70fa51STao Ma unsigned int from, to; 28476f70fa51STao Ma loff_t offset, end, map_end; 28486f70fa51STao Ma struct address_space *mapping = context->inode->i_mapping; 28496f70fa51STao Ma 28506f70fa51STao Ma mlog(0, "old_cluster %u, new %u, len %u at offset %u\n", old_cluster, 28516f70fa51STao Ma new_cluster, new_len, cpos); 28526f70fa51STao Ma 28536f70fa51STao Ma offset = ((loff_t)cpos) << OCFS2_SB(sb)->s_clustersize_bits; 28546f70fa51STao Ma end = offset + (new_len << OCFS2_SB(sb)->s_clustersize_bits); 28556f70fa51STao Ma 28566f70fa51STao Ma while (offset < end) { 28576f70fa51STao Ma page_index = offset >> PAGE_CACHE_SHIFT; 28586f70fa51STao Ma map_end = (page_index + 1) << PAGE_CACHE_SHIFT; 28596f70fa51STao Ma if (map_end > end) 28606f70fa51STao Ma map_end = end; 28616f70fa51STao Ma 28626f70fa51STao Ma /* from, to is the offset within the page. */ 28636f70fa51STao Ma from = offset & (PAGE_CACHE_SIZE - 1); 28646f70fa51STao Ma to = PAGE_CACHE_SIZE; 28656f70fa51STao Ma if (map_end & (PAGE_CACHE_SIZE - 1)) 28666f70fa51STao Ma to = map_end & (PAGE_CACHE_SIZE - 1); 28676f70fa51STao Ma 28686f70fa51STao Ma page = grab_cache_page(mapping, page_index); 28696f70fa51STao Ma 28706f70fa51STao Ma /* This page can't be dirtied before we CoW it out. */ 28716f70fa51STao Ma BUG_ON(PageDirty(page)); 28726f70fa51STao Ma 28736f70fa51STao Ma if (!PageUptodate(page)) { 28746f70fa51STao Ma ret = block_read_full_page(page, ocfs2_get_block); 28756f70fa51STao Ma if (ret) { 28766f70fa51STao Ma mlog_errno(ret); 28776f70fa51STao Ma goto unlock; 28786f70fa51STao Ma } 28796f70fa51STao Ma lock_page(page); 28806f70fa51STao Ma } 28816f70fa51STao Ma 28826f70fa51STao Ma if (page_has_buffers(page)) { 28836f70fa51STao Ma ret = walk_page_buffers(handle, page_buffers(page), 28846f70fa51STao Ma from, to, &partial, 28856f70fa51STao Ma ocfs2_clear_cow_buffer); 28866f70fa51STao Ma if (ret) { 28876f70fa51STao Ma mlog_errno(ret); 28886f70fa51STao Ma goto unlock; 28896f70fa51STao Ma } 28906f70fa51STao Ma } 28916f70fa51STao Ma 28926f70fa51STao Ma ocfs2_map_and_dirty_page(context->inode, 28936f70fa51STao Ma handle, from, to, 28946f70fa51STao Ma page, 0, &new_block); 28956f70fa51STao Ma mark_page_accessed(page); 28966f70fa51STao Ma unlock: 28976f70fa51STao Ma unlock_page(page); 28986f70fa51STao Ma page_cache_release(page); 28996f70fa51STao Ma page = NULL; 29006f70fa51STao Ma offset = map_end; 29016f70fa51STao Ma if (ret) 29026f70fa51STao Ma break; 29036f70fa51STao Ma } 29046f70fa51STao Ma 29056f70fa51STao Ma return ret; 29066f70fa51STao Ma } 29076f70fa51STao Ma 2908492a8a33STao Ma static int ocfs2_duplicate_clusters_by_jbd(handle_t *handle, 2909492a8a33STao Ma struct ocfs2_cow_context *context, 2910492a8a33STao Ma u32 cpos, u32 old_cluster, 2911492a8a33STao Ma u32 new_cluster, u32 new_len) 2912492a8a33STao Ma { 2913492a8a33STao Ma int ret = 0; 2914492a8a33STao Ma struct super_block *sb = context->inode->i_sb; 2915492a8a33STao Ma struct ocfs2_caching_info *ci = context->data_et.et_ci; 2916492a8a33STao Ma int i, blocks = ocfs2_clusters_to_blocks(sb, new_len); 2917492a8a33STao Ma u64 old_block = ocfs2_clusters_to_blocks(sb, old_cluster); 2918492a8a33STao Ma u64 new_block = ocfs2_clusters_to_blocks(sb, new_cluster); 2919492a8a33STao Ma struct ocfs2_super *osb = OCFS2_SB(sb); 2920492a8a33STao Ma struct buffer_head *old_bh = NULL; 2921492a8a33STao Ma struct buffer_head *new_bh = NULL; 2922492a8a33STao Ma 2923492a8a33STao Ma mlog(0, "old_cluster %u, new %u, len %u\n", old_cluster, 2924492a8a33STao Ma new_cluster, new_len); 2925492a8a33STao Ma 2926492a8a33STao Ma for (i = 0; i < blocks; i++, old_block++, new_block++) { 2927492a8a33STao Ma new_bh = sb_getblk(osb->sb, new_block); 2928492a8a33STao Ma if (new_bh == NULL) { 2929492a8a33STao Ma ret = -EIO; 2930492a8a33STao Ma mlog_errno(ret); 2931492a8a33STao Ma break; 2932492a8a33STao Ma } 2933492a8a33STao Ma 2934492a8a33STao Ma ocfs2_set_new_buffer_uptodate(ci, new_bh); 2935492a8a33STao Ma 2936492a8a33STao Ma ret = ocfs2_read_block(ci, old_block, &old_bh, NULL); 2937492a8a33STao Ma if (ret) { 2938492a8a33STao Ma mlog_errno(ret); 2939492a8a33STao Ma break; 2940492a8a33STao Ma } 2941492a8a33STao Ma 2942492a8a33STao Ma ret = ocfs2_journal_access(handle, ci, new_bh, 2943492a8a33STao Ma OCFS2_JOURNAL_ACCESS_CREATE); 2944492a8a33STao Ma if (ret) { 2945492a8a33STao Ma mlog_errno(ret); 2946492a8a33STao Ma break; 2947492a8a33STao Ma } 2948492a8a33STao Ma 2949492a8a33STao Ma memcpy(new_bh->b_data, old_bh->b_data, sb->s_blocksize); 2950492a8a33STao Ma ret = ocfs2_journal_dirty(handle, new_bh); 2951492a8a33STao Ma if (ret) { 2952492a8a33STao Ma mlog_errno(ret); 2953492a8a33STao Ma break; 2954492a8a33STao Ma } 2955492a8a33STao Ma 2956492a8a33STao Ma brelse(new_bh); 2957492a8a33STao Ma brelse(old_bh); 2958492a8a33STao Ma new_bh = NULL; 2959492a8a33STao Ma old_bh = NULL; 2960492a8a33STao Ma } 2961492a8a33STao Ma 2962492a8a33STao Ma brelse(new_bh); 2963492a8a33STao Ma brelse(old_bh); 2964492a8a33STao Ma return ret; 2965492a8a33STao Ma } 2966492a8a33STao Ma 29676f70fa51STao Ma static int ocfs2_clear_ext_refcount(handle_t *handle, 29686f70fa51STao Ma struct ocfs2_extent_tree *et, 29696f70fa51STao Ma u32 cpos, u32 p_cluster, u32 len, 29706f70fa51STao Ma unsigned int ext_flags, 29716f70fa51STao Ma struct ocfs2_alloc_context *meta_ac, 29726f70fa51STao Ma struct ocfs2_cached_dealloc_ctxt *dealloc) 29736f70fa51STao Ma { 29746f70fa51STao Ma int ret, index; 29756f70fa51STao Ma struct ocfs2_extent_rec replace_rec; 29766f70fa51STao Ma struct ocfs2_path *path = NULL; 29776f70fa51STao Ma struct ocfs2_extent_list *el; 29786f70fa51STao Ma struct super_block *sb = ocfs2_metadata_cache_get_super(et->et_ci); 29796f70fa51STao Ma u64 ino = ocfs2_metadata_cache_owner(et->et_ci); 29806f70fa51STao Ma 29816f70fa51STao Ma mlog(0, "inode %llu cpos %u, len %u, p_cluster %u, ext_flags %u\n", 29826f70fa51STao Ma (unsigned long long)ino, cpos, len, p_cluster, ext_flags); 29836f70fa51STao Ma 29846f70fa51STao Ma memset(&replace_rec, 0, sizeof(replace_rec)); 29856f70fa51STao Ma replace_rec.e_cpos = cpu_to_le32(cpos); 29866f70fa51STao Ma replace_rec.e_leaf_clusters = cpu_to_le16(len); 29876f70fa51STao Ma replace_rec.e_blkno = cpu_to_le64(ocfs2_clusters_to_blocks(sb, 29886f70fa51STao Ma p_cluster)); 29896f70fa51STao Ma replace_rec.e_flags = ext_flags; 29906f70fa51STao Ma replace_rec.e_flags &= ~OCFS2_EXT_REFCOUNTED; 29916f70fa51STao Ma 29926f70fa51STao Ma path = ocfs2_new_path_from_et(et); 29936f70fa51STao Ma if (!path) { 29946f70fa51STao Ma ret = -ENOMEM; 29956f70fa51STao Ma mlog_errno(ret); 29966f70fa51STao Ma goto out; 29976f70fa51STao Ma } 29986f70fa51STao Ma 29996f70fa51STao Ma ret = ocfs2_find_path(et->et_ci, path, cpos); 30006f70fa51STao Ma if (ret) { 30016f70fa51STao Ma mlog_errno(ret); 30026f70fa51STao Ma goto out; 30036f70fa51STao Ma } 30046f70fa51STao Ma 30056f70fa51STao Ma el = path_leaf_el(path); 30066f70fa51STao Ma 30076f70fa51STao Ma index = ocfs2_search_extent_list(el, cpos); 30086f70fa51STao Ma if (index == -1 || index >= le16_to_cpu(el->l_next_free_rec)) { 30096f70fa51STao Ma ocfs2_error(sb, 30106f70fa51STao Ma "Inode %llu has an extent at cpos %u which can no " 30116f70fa51STao Ma "longer be found.\n", 30126f70fa51STao Ma (unsigned long long)ino, cpos); 30136f70fa51STao Ma ret = -EROFS; 30146f70fa51STao Ma goto out; 30156f70fa51STao Ma } 30166f70fa51STao Ma 30176f70fa51STao Ma ret = ocfs2_split_extent(handle, et, path, index, 30186f70fa51STao Ma &replace_rec, meta_ac, dealloc); 30196f70fa51STao Ma if (ret) 30206f70fa51STao Ma mlog_errno(ret); 30216f70fa51STao Ma 30226f70fa51STao Ma out: 30236f70fa51STao Ma ocfs2_free_path(path); 30246f70fa51STao Ma return ret; 30256f70fa51STao Ma } 30266f70fa51STao Ma 30276f70fa51STao Ma static int ocfs2_replace_clusters(handle_t *handle, 30286f70fa51STao Ma struct ocfs2_cow_context *context, 30296f70fa51STao Ma u32 cpos, u32 old, 30306f70fa51STao Ma u32 new, u32 len, 30316f70fa51STao Ma unsigned int ext_flags) 30326f70fa51STao Ma { 30336f70fa51STao Ma int ret; 3034913580b4STao Ma struct ocfs2_caching_info *ci = context->data_et.et_ci; 30356f70fa51STao Ma u64 ino = ocfs2_metadata_cache_owner(ci); 30366f70fa51STao Ma 30376f70fa51STao Ma mlog(0, "inode %llu, cpos %u, old %u, new %u, len %u, ext_flags %u\n", 30386f70fa51STao Ma (unsigned long long)ino, cpos, old, new, len, ext_flags); 30396f70fa51STao Ma 30406f70fa51STao Ma /*If the old clusters is unwritten, no need to duplicate. */ 30416f70fa51STao Ma if (!(ext_flags & OCFS2_EXT_UNWRITTEN)) { 3042913580b4STao Ma ret = context->cow_duplicate_clusters(handle, context, cpos, 30436f70fa51STao Ma old, new, len); 30446f70fa51STao Ma if (ret) { 30456f70fa51STao Ma mlog_errno(ret); 30466f70fa51STao Ma goto out; 30476f70fa51STao Ma } 30486f70fa51STao Ma } 30496f70fa51STao Ma 3050913580b4STao Ma ret = ocfs2_clear_ext_refcount(handle, &context->data_et, 30516f70fa51STao Ma cpos, new, len, ext_flags, 30526f70fa51STao Ma context->meta_ac, &context->dealloc); 30536f70fa51STao Ma if (ret) 30546f70fa51STao Ma mlog_errno(ret); 30556f70fa51STao Ma out: 30566f70fa51STao Ma return ret; 30576f70fa51STao Ma } 30586f70fa51STao Ma 30596f70fa51STao Ma static int ocfs2_cow_sync_writeback(struct super_block *sb, 30606f70fa51STao Ma struct ocfs2_cow_context *context, 30616f70fa51STao Ma u32 cpos, u32 num_clusters) 30626f70fa51STao Ma { 30636f70fa51STao Ma int ret = 0; 30646f70fa51STao Ma loff_t offset, end, map_end; 30656f70fa51STao Ma pgoff_t page_index; 30666f70fa51STao Ma struct page *page; 30676f70fa51STao Ma 30686f70fa51STao Ma if (ocfs2_should_order_data(context->inode)) 30696f70fa51STao Ma return 0; 30706f70fa51STao Ma 30716f70fa51STao Ma offset = ((loff_t)cpos) << OCFS2_SB(sb)->s_clustersize_bits; 30726f70fa51STao Ma end = offset + (num_clusters << OCFS2_SB(sb)->s_clustersize_bits); 30736f70fa51STao Ma 30746f70fa51STao Ma ret = filemap_fdatawrite_range(context->inode->i_mapping, 30756f70fa51STao Ma offset, end - 1); 30766f70fa51STao Ma if (ret < 0) { 30776f70fa51STao Ma mlog_errno(ret); 30786f70fa51STao Ma return ret; 30796f70fa51STao Ma } 30806f70fa51STao Ma 30816f70fa51STao Ma while (offset < end) { 30826f70fa51STao Ma page_index = offset >> PAGE_CACHE_SHIFT; 30836f70fa51STao Ma map_end = (page_index + 1) << PAGE_CACHE_SHIFT; 30846f70fa51STao Ma if (map_end > end) 30856f70fa51STao Ma map_end = end; 30866f70fa51STao Ma 30876f70fa51STao Ma page = grab_cache_page(context->inode->i_mapping, page_index); 30886f70fa51STao Ma BUG_ON(!page); 30896f70fa51STao Ma 30906f70fa51STao Ma wait_on_page_writeback(page); 30916f70fa51STao Ma if (PageError(page)) { 30926f70fa51STao Ma ret = -EIO; 30936f70fa51STao Ma mlog_errno(ret); 30946f70fa51STao Ma } else 30956f70fa51STao Ma mark_page_accessed(page); 30966f70fa51STao Ma 30976f70fa51STao Ma unlock_page(page); 30986f70fa51STao Ma page_cache_release(page); 30996f70fa51STao Ma page = NULL; 31006f70fa51STao Ma offset = map_end; 31016f70fa51STao Ma if (ret) 31026f70fa51STao Ma break; 31036f70fa51STao Ma } 31046f70fa51STao Ma 31056f70fa51STao Ma return ret; 31066f70fa51STao Ma } 31076f70fa51STao Ma 3108913580b4STao Ma static int ocfs2_di_get_clusters(struct ocfs2_cow_context *context, 3109913580b4STao Ma u32 v_cluster, u32 *p_cluster, 3110913580b4STao Ma u32 *num_clusters, 3111913580b4STao Ma unsigned int *extent_flags) 3112913580b4STao Ma { 3113913580b4STao Ma return ocfs2_get_clusters(context->inode, v_cluster, p_cluster, 3114913580b4STao Ma num_clusters, extent_flags); 3115913580b4STao Ma } 3116913580b4STao Ma 31176f70fa51STao Ma static int ocfs2_make_clusters_writable(struct super_block *sb, 31186f70fa51STao Ma struct ocfs2_cow_context *context, 31196f70fa51STao Ma u32 cpos, u32 p_cluster, 31206f70fa51STao Ma u32 num_clusters, unsigned int e_flags) 31216f70fa51STao Ma { 31226ae23c55STao Ma int ret, delete, index, credits = 0; 31236f70fa51STao Ma u32 new_bit, new_len; 31246ae23c55STao Ma unsigned int set_len; 31256f70fa51STao Ma struct ocfs2_super *osb = OCFS2_SB(sb); 31266f70fa51STao Ma handle_t *handle; 31276ae23c55STao Ma struct buffer_head *ref_leaf_bh = NULL; 3128913580b4STao Ma struct ocfs2_caching_info *ref_ci = &context->ref_tree->rf_ci; 31296ae23c55STao Ma struct ocfs2_refcount_rec rec; 31306ae23c55STao Ma 31316ae23c55STao Ma mlog(0, "cpos %u, p_cluster %u, num_clusters %u, e_flags %u\n", 31326ae23c55STao Ma cpos, p_cluster, num_clusters, e_flags); 31336f70fa51STao Ma 31346f70fa51STao Ma ret = ocfs2_lock_refcount_allocators(sb, p_cluster, num_clusters, 3135913580b4STao Ma &context->data_et, 3136913580b4STao Ma ref_ci, 31376f70fa51STao Ma context->ref_root_bh, 31386f70fa51STao Ma &context->meta_ac, 31396f70fa51STao Ma &context->data_ac, &credits); 31406f70fa51STao Ma if (ret) { 31416f70fa51STao Ma mlog_errno(ret); 31426f70fa51STao Ma return ret; 31436f70fa51STao Ma } 31446f70fa51STao Ma 3145492a8a33STao Ma if (context->post_refcount) 3146492a8a33STao Ma credits += context->post_refcount->credits; 3147492a8a33STao Ma 3148492a8a33STao Ma credits += context->extra_credits; 31496f70fa51STao Ma handle = ocfs2_start_trans(osb, credits); 31506f70fa51STao Ma if (IS_ERR(handle)) { 31516f70fa51STao Ma ret = PTR_ERR(handle); 31526f70fa51STao Ma mlog_errno(ret); 31536f70fa51STao Ma goto out; 31546f70fa51STao Ma } 31556f70fa51STao Ma 31566f70fa51STao Ma while (num_clusters) { 3157913580b4STao Ma ret = ocfs2_get_refcount_rec(ref_ci, context->ref_root_bh, 31586ae23c55STao Ma p_cluster, num_clusters, 31596ae23c55STao Ma &rec, &index, &ref_leaf_bh); 31606ae23c55STao Ma if (ret) { 31616ae23c55STao Ma mlog_errno(ret); 31626ae23c55STao Ma goto out_commit; 31636ae23c55STao Ma } 31646ae23c55STao Ma 31656ae23c55STao Ma BUG_ON(!rec.r_refcount); 31666ae23c55STao Ma set_len = min((u64)p_cluster + num_clusters, 31676ae23c55STao Ma le64_to_cpu(rec.r_cpos) + 31686ae23c55STao Ma le32_to_cpu(rec.r_clusters)) - p_cluster; 31696ae23c55STao Ma 31706ae23c55STao Ma /* 31716ae23c55STao Ma * There are many different situation here. 31726ae23c55STao Ma * 1. If refcount == 1, remove the flag and don't COW. 31736ae23c55STao Ma * 2. If refcount > 1, allocate clusters. 31746ae23c55STao Ma * Here we may not allocate r_len once at a time, so continue 31756ae23c55STao Ma * until we reach num_clusters. 31766ae23c55STao Ma */ 31776ae23c55STao Ma if (le32_to_cpu(rec.r_refcount) == 1) { 31786ae23c55STao Ma delete = 0; 3179913580b4STao Ma ret = ocfs2_clear_ext_refcount(handle, 3180913580b4STao Ma &context->data_et, 31816ae23c55STao Ma cpos, p_cluster, 31826ae23c55STao Ma set_len, e_flags, 31836ae23c55STao Ma context->meta_ac, 31846ae23c55STao Ma &context->dealloc); 31856ae23c55STao Ma if (ret) { 31866ae23c55STao Ma mlog_errno(ret); 31876ae23c55STao Ma goto out_commit; 31886ae23c55STao Ma } 31896ae23c55STao Ma } else { 31906ae23c55STao Ma delete = 1; 31916ae23c55STao Ma 31926ae23c55STao Ma ret = __ocfs2_claim_clusters(osb, handle, 31936ae23c55STao Ma context->data_ac, 31946ae23c55STao Ma 1, set_len, 31956f70fa51STao Ma &new_bit, &new_len); 31966f70fa51STao Ma if (ret) { 31976f70fa51STao Ma mlog_errno(ret); 31986f70fa51STao Ma goto out_commit; 31996f70fa51STao Ma } 32006f70fa51STao Ma 32016f70fa51STao Ma ret = ocfs2_replace_clusters(handle, context, 32026f70fa51STao Ma cpos, p_cluster, new_bit, 32036f70fa51STao Ma new_len, e_flags); 32046f70fa51STao Ma if (ret) { 32056f70fa51STao Ma mlog_errno(ret); 32066f70fa51STao Ma goto out_commit; 32076f70fa51STao Ma } 32086ae23c55STao Ma set_len = new_len; 32096f70fa51STao Ma } 32106f70fa51STao Ma 3211913580b4STao Ma ret = __ocfs2_decrease_refcount(handle, ref_ci, 32126f70fa51STao Ma context->ref_root_bh, 32136ae23c55STao Ma p_cluster, set_len, 32146f70fa51STao Ma context->meta_ac, 32156ae23c55STao Ma &context->dealloc, delete); 32166f70fa51STao Ma if (ret) { 32176f70fa51STao Ma mlog_errno(ret); 32186f70fa51STao Ma goto out_commit; 32196f70fa51STao Ma } 32206f70fa51STao Ma 32216ae23c55STao Ma cpos += set_len; 32226ae23c55STao Ma p_cluster += set_len; 32236ae23c55STao Ma num_clusters -= set_len; 32246ae23c55STao Ma brelse(ref_leaf_bh); 32256ae23c55STao Ma ref_leaf_bh = NULL; 32266ae23c55STao Ma } 32276ae23c55STao Ma 3228492a8a33STao Ma /* handle any post_cow action. */ 3229492a8a33STao Ma if (context->post_refcount && context->post_refcount->func) { 3230492a8a33STao Ma ret = context->post_refcount->func(context->inode, handle, 3231492a8a33STao Ma context->post_refcount->para); 3232492a8a33STao Ma if (ret) { 3233492a8a33STao Ma mlog_errno(ret); 3234492a8a33STao Ma goto out_commit; 3235492a8a33STao Ma } 3236492a8a33STao Ma } 3237492a8a33STao Ma 32386f70fa51STao Ma /* 32396f70fa51STao Ma * Here we should write the new page out first if we are 32406f70fa51STao Ma * in write-back mode. 32416f70fa51STao Ma */ 3242492a8a33STao Ma if (context->get_clusters == ocfs2_di_get_clusters) { 32436f70fa51STao Ma ret = ocfs2_cow_sync_writeback(sb, context, cpos, num_clusters); 32446f70fa51STao Ma if (ret) 32456f70fa51STao Ma mlog_errno(ret); 3246492a8a33STao Ma } 32476f70fa51STao Ma 32486f70fa51STao Ma out_commit: 32496f70fa51STao Ma ocfs2_commit_trans(osb, handle); 32506f70fa51STao Ma 32516f70fa51STao Ma out: 32526f70fa51STao Ma if (context->data_ac) { 32536f70fa51STao Ma ocfs2_free_alloc_context(context->data_ac); 32546f70fa51STao Ma context->data_ac = NULL; 32556f70fa51STao Ma } 32566f70fa51STao Ma if (context->meta_ac) { 32576f70fa51STao Ma ocfs2_free_alloc_context(context->meta_ac); 32586f70fa51STao Ma context->meta_ac = NULL; 32596f70fa51STao Ma } 32606ae23c55STao Ma brelse(ref_leaf_bh); 32616f70fa51STao Ma 32626f70fa51STao Ma return ret; 32636f70fa51STao Ma } 32646f70fa51STao Ma 3265913580b4STao Ma static int ocfs2_replace_cow(struct ocfs2_cow_context *context) 32666f70fa51STao Ma { 32676f70fa51STao Ma int ret = 0; 3268913580b4STao Ma struct inode *inode = context->inode; 3269913580b4STao Ma u32 cow_start = context->cow_start, cow_len = context->cow_len; 3270913580b4STao Ma u32 p_cluster, num_clusters; 32716f70fa51STao Ma unsigned int ext_flags; 32726f70fa51STao Ma struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); 32736f70fa51STao Ma 32746f70fa51STao Ma if (!ocfs2_refcount_tree(OCFS2_SB(inode->i_sb))) { 32756f70fa51STao Ma ocfs2_error(inode->i_sb, "Inode %lu want to use refcount " 32766f70fa51STao Ma "tree, but the feature bit is not set in the " 32776f70fa51STao Ma "super block.", inode->i_ino); 32786f70fa51STao Ma return -EROFS; 32796f70fa51STao Ma } 32806f70fa51STao Ma 32816f70fa51STao Ma ocfs2_init_dealloc_ctxt(&context->dealloc); 32826f70fa51STao Ma 32836f70fa51STao Ma while (cow_len) { 3284913580b4STao Ma ret = context->get_clusters(context, cow_start, &p_cluster, 32856f70fa51STao Ma &num_clusters, &ext_flags); 32866f70fa51STao Ma if (ret) { 32876f70fa51STao Ma mlog_errno(ret); 32886f70fa51STao Ma break; 32896f70fa51STao Ma } 32906f70fa51STao Ma 32916f70fa51STao Ma BUG_ON(!(ext_flags & OCFS2_EXT_REFCOUNTED)); 32926f70fa51STao Ma 32936f70fa51STao Ma if (cow_len < num_clusters) 32946f70fa51STao Ma num_clusters = cow_len; 32956f70fa51STao Ma 32966f70fa51STao Ma ret = ocfs2_make_clusters_writable(inode->i_sb, context, 32976f70fa51STao Ma cow_start, p_cluster, 32986f70fa51STao Ma num_clusters, ext_flags); 32996f70fa51STao Ma if (ret) { 33006f70fa51STao Ma mlog_errno(ret); 33016f70fa51STao Ma break; 33026f70fa51STao Ma } 33036f70fa51STao Ma 33046f70fa51STao Ma cow_len -= num_clusters; 33056f70fa51STao Ma cow_start += num_clusters; 33066f70fa51STao Ma } 33076f70fa51STao Ma 33086f70fa51STao Ma if (ocfs2_dealloc_has_cluster(&context->dealloc)) { 33096f70fa51STao Ma ocfs2_schedule_truncate_log_flush(osb, 1); 33106f70fa51STao Ma ocfs2_run_deallocs(osb, &context->dealloc); 33116f70fa51STao Ma } 33126f70fa51STao Ma 33136f70fa51STao Ma return ret; 33146f70fa51STao Ma } 33156f70fa51STao Ma 33166f70fa51STao Ma /* 331737f8a2bfSTao Ma * Starting at cpos, try to CoW write_len clusters. Don't CoW 331837f8a2bfSTao Ma * past max_cpos. This will stop when it runs into a hole or an 331937f8a2bfSTao Ma * unrefcounted extent. 33206f70fa51STao Ma */ 33216f70fa51STao Ma static int ocfs2_refcount_cow_hunk(struct inode *inode, 33226f70fa51STao Ma struct buffer_head *di_bh, 332337f8a2bfSTao Ma u32 cpos, u32 write_len, u32 max_cpos) 33246f70fa51STao Ma { 33256f70fa51STao Ma int ret; 33266f70fa51STao Ma u32 cow_start = 0, cow_len = 0; 33276f70fa51STao Ma struct ocfs2_inode_info *oi = OCFS2_I(inode); 33286f70fa51STao Ma struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); 33296f70fa51STao Ma struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; 33306f70fa51STao Ma struct buffer_head *ref_root_bh = NULL; 33316f70fa51STao Ma struct ocfs2_refcount_tree *ref_tree; 3332913580b4STao Ma struct ocfs2_cow_context *context = NULL; 33336f70fa51STao Ma 33346f70fa51STao Ma BUG_ON(!(oi->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL)); 33356f70fa51STao Ma 3336913580b4STao Ma ret = ocfs2_refcount_cal_cow_clusters(inode, &di->id2.i_list, 333737f8a2bfSTao Ma cpos, write_len, max_cpos, 33386f70fa51STao Ma &cow_start, &cow_len); 33396f70fa51STao Ma if (ret) { 33406f70fa51STao Ma mlog_errno(ret); 33416f70fa51STao Ma goto out; 33426f70fa51STao Ma } 334337f8a2bfSTao Ma 33446f70fa51STao Ma mlog(0, "CoW inode %lu, cpos %u, write_len %u, cow_start %u, " 33456f70fa51STao Ma "cow_len %u\n", inode->i_ino, 33466f70fa51STao Ma cpos, write_len, cow_start, cow_len); 33476f70fa51STao Ma 33486f70fa51STao Ma BUG_ON(cow_len == 0); 33496f70fa51STao Ma 3350913580b4STao Ma context = kzalloc(sizeof(struct ocfs2_cow_context), GFP_NOFS); 3351913580b4STao Ma if (!context) { 3352913580b4STao Ma ret = -ENOMEM; 3353913580b4STao Ma mlog_errno(ret); 3354913580b4STao Ma goto out; 3355913580b4STao Ma } 3356913580b4STao Ma 33576f70fa51STao Ma ret = ocfs2_lock_refcount_tree(osb, le64_to_cpu(di->i_refcount_loc), 33586f70fa51STao Ma 1, &ref_tree, &ref_root_bh); 33596f70fa51STao Ma if (ret) { 33606f70fa51STao Ma mlog_errno(ret); 33616f70fa51STao Ma goto out; 33626f70fa51STao Ma } 33636f70fa51STao Ma 3364913580b4STao Ma context->inode = inode; 3365913580b4STao Ma context->cow_start = cow_start; 3366913580b4STao Ma context->cow_len = cow_len; 3367913580b4STao Ma context->ref_tree = ref_tree; 3368913580b4STao Ma context->ref_root_bh = ref_root_bh; 3369913580b4STao Ma context->cow_duplicate_clusters = ocfs2_duplicate_clusters_by_page; 3370913580b4STao Ma context->get_clusters = ocfs2_di_get_clusters; 3371913580b4STao Ma 3372913580b4STao Ma ocfs2_init_dinode_extent_tree(&context->data_et, 3373913580b4STao Ma INODE_CACHE(inode), di_bh); 3374913580b4STao Ma 3375913580b4STao Ma ret = ocfs2_replace_cow(context); 33766f70fa51STao Ma if (ret) 33776f70fa51STao Ma mlog_errno(ret); 33786f70fa51STao Ma 3379913580b4STao Ma /* 3380913580b4STao Ma * truncate the extent map here since no matter whether we meet with 3381913580b4STao Ma * any error during the action, we shouldn't trust cached extent map 3382913580b4STao Ma * any more. 3383913580b4STao Ma */ 3384913580b4STao Ma ocfs2_extent_map_trunc(inode, cow_start); 3385913580b4STao Ma 33866f70fa51STao Ma ocfs2_unlock_refcount_tree(osb, ref_tree, 1); 33876f70fa51STao Ma brelse(ref_root_bh); 33886f70fa51STao Ma out: 3389913580b4STao Ma kfree(context); 33906f70fa51STao Ma return ret; 33916f70fa51STao Ma } 33926f70fa51STao Ma 33936f70fa51STao Ma /* 33946f70fa51STao Ma * CoW any and all clusters between cpos and cpos+write_len. 339537f8a2bfSTao Ma * Don't CoW past max_cpos. If this returns successfully, all 339637f8a2bfSTao Ma * clusters between cpos and cpos+write_len are safe to modify. 33976f70fa51STao Ma */ 33986f70fa51STao Ma int ocfs2_refcount_cow(struct inode *inode, 33996f70fa51STao Ma struct buffer_head *di_bh, 340037f8a2bfSTao Ma u32 cpos, u32 write_len, u32 max_cpos) 34016f70fa51STao Ma { 34026f70fa51STao Ma int ret = 0; 34036f70fa51STao Ma u32 p_cluster, num_clusters; 34046f70fa51STao Ma unsigned int ext_flags; 34056f70fa51STao Ma 34066f70fa51STao Ma while (write_len) { 34076f70fa51STao Ma ret = ocfs2_get_clusters(inode, cpos, &p_cluster, 34086f70fa51STao Ma &num_clusters, &ext_flags); 34096f70fa51STao Ma if (ret) { 34106f70fa51STao Ma mlog_errno(ret); 34116f70fa51STao Ma break; 34126f70fa51STao Ma } 34136f70fa51STao Ma 34146f70fa51STao Ma if (write_len < num_clusters) 34156f70fa51STao Ma num_clusters = write_len; 34166f70fa51STao Ma 34176f70fa51STao Ma if (ext_flags & OCFS2_EXT_REFCOUNTED) { 34186f70fa51STao Ma ret = ocfs2_refcount_cow_hunk(inode, di_bh, cpos, 341937f8a2bfSTao Ma num_clusters, max_cpos); 34206f70fa51STao Ma if (ret) { 34216f70fa51STao Ma mlog_errno(ret); 34226f70fa51STao Ma break; 34236f70fa51STao Ma } 34246f70fa51STao Ma } 34256f70fa51STao Ma 34266f70fa51STao Ma write_len -= num_clusters; 34276f70fa51STao Ma cpos += num_clusters; 34286f70fa51STao Ma } 34296f70fa51STao Ma 34306f70fa51STao Ma return ret; 34316f70fa51STao Ma } 3432110a045aSTao Ma 3433492a8a33STao Ma static int ocfs2_xattr_value_get_clusters(struct ocfs2_cow_context *context, 3434492a8a33STao Ma u32 v_cluster, u32 *p_cluster, 3435492a8a33STao Ma u32 *num_clusters, 3436492a8a33STao Ma unsigned int *extent_flags) 3437492a8a33STao Ma { 3438492a8a33STao Ma struct inode *inode = context->inode; 3439492a8a33STao Ma struct ocfs2_xattr_value_root *xv = context->cow_object; 3440492a8a33STao Ma 3441492a8a33STao Ma return ocfs2_xattr_get_clusters(inode, v_cluster, p_cluster, 3442492a8a33STao Ma num_clusters, &xv->xr_list, 3443492a8a33STao Ma extent_flags); 3444492a8a33STao Ma } 3445492a8a33STao Ma 3446492a8a33STao Ma /* 3447492a8a33STao Ma * Given a xattr value root, calculate the most meta/credits we need for 3448492a8a33STao Ma * refcount tree change if we truncate it to 0. 3449492a8a33STao Ma */ 3450492a8a33STao Ma int ocfs2_refcounted_xattr_delete_need(struct inode *inode, 3451492a8a33STao Ma struct ocfs2_caching_info *ref_ci, 3452492a8a33STao Ma struct buffer_head *ref_root_bh, 3453492a8a33STao Ma struct ocfs2_xattr_value_root *xv, 3454492a8a33STao Ma int *meta_add, int *credits) 3455492a8a33STao Ma { 3456492a8a33STao Ma int ret = 0, index, ref_blocks = 0; 3457492a8a33STao Ma u32 p_cluster, num_clusters; 3458492a8a33STao Ma u32 cpos = 0, clusters = le32_to_cpu(xv->xr_clusters); 3459492a8a33STao Ma struct ocfs2_refcount_block *rb; 3460492a8a33STao Ma struct ocfs2_refcount_rec rec; 3461492a8a33STao Ma struct buffer_head *ref_leaf_bh = NULL; 3462492a8a33STao Ma 3463492a8a33STao Ma while (cpos < clusters) { 3464492a8a33STao Ma ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, 3465492a8a33STao Ma &num_clusters, &xv->xr_list, 3466492a8a33STao Ma NULL); 3467492a8a33STao Ma if (ret) { 3468492a8a33STao Ma mlog_errno(ret); 3469492a8a33STao Ma goto out; 3470492a8a33STao Ma } 3471492a8a33STao Ma 3472492a8a33STao Ma cpos += num_clusters; 3473492a8a33STao Ma 3474492a8a33STao Ma while (num_clusters) { 3475492a8a33STao Ma ret = ocfs2_get_refcount_rec(ref_ci, ref_root_bh, 3476492a8a33STao Ma p_cluster, num_clusters, 3477492a8a33STao Ma &rec, &index, 3478492a8a33STao Ma &ref_leaf_bh); 3479492a8a33STao Ma if (ret) { 3480492a8a33STao Ma mlog_errno(ret); 3481492a8a33STao Ma goto out; 3482492a8a33STao Ma } 3483492a8a33STao Ma 3484492a8a33STao Ma BUG_ON(!rec.r_refcount); 3485492a8a33STao Ma 3486492a8a33STao Ma rb = (struct ocfs2_refcount_block *)ref_leaf_bh->b_data; 3487492a8a33STao Ma 3488492a8a33STao Ma /* 3489492a8a33STao Ma * We really don't know whether the other clusters is in 3490492a8a33STao Ma * this refcount block or not, so just take the worst 3491492a8a33STao Ma * case that all the clusters are in this block and each 3492492a8a33STao Ma * one will split a refcount rec, so totally we need 3493492a8a33STao Ma * clusters * 2 new refcount rec. 3494492a8a33STao Ma */ 3495492a8a33STao Ma if (le64_to_cpu(rb->rf_records.rl_used) + clusters * 2 > 3496492a8a33STao Ma le16_to_cpu(rb->rf_records.rl_count)) 3497492a8a33STao Ma ref_blocks++; 3498492a8a33STao Ma 3499492a8a33STao Ma *credits += 1; 3500492a8a33STao Ma brelse(ref_leaf_bh); 3501492a8a33STao Ma ref_leaf_bh = NULL; 3502492a8a33STao Ma 3503492a8a33STao Ma if (num_clusters <= le32_to_cpu(rec.r_clusters)) 3504492a8a33STao Ma break; 3505492a8a33STao Ma else 3506492a8a33STao Ma num_clusters -= le32_to_cpu(rec.r_clusters); 3507492a8a33STao Ma p_cluster += num_clusters; 3508492a8a33STao Ma } 3509492a8a33STao Ma } 3510492a8a33STao Ma 3511492a8a33STao Ma *meta_add += ref_blocks; 3512492a8a33STao Ma if (!ref_blocks) 3513492a8a33STao Ma goto out; 3514492a8a33STao Ma 3515492a8a33STao Ma rb = (struct ocfs2_refcount_block *)ref_root_bh->b_data; 3516492a8a33STao Ma if (le32_to_cpu(rb->rf_flags) & OCFS2_REFCOUNT_TREE_FL) 3517492a8a33STao Ma *credits += OCFS2_EXPAND_REFCOUNT_TREE_CREDITS; 3518492a8a33STao Ma else { 3519492a8a33STao Ma struct ocfs2_extent_tree et; 3520492a8a33STao Ma 3521492a8a33STao Ma ocfs2_init_refcount_extent_tree(&et, ref_ci, ref_root_bh); 3522492a8a33STao Ma *credits += ocfs2_calc_extend_credits(inode->i_sb, 3523492a8a33STao Ma et.et_root_el, 3524492a8a33STao Ma ref_blocks); 3525492a8a33STao Ma } 3526492a8a33STao Ma 3527492a8a33STao Ma out: 3528492a8a33STao Ma brelse(ref_leaf_bh); 3529492a8a33STao Ma return ret; 3530492a8a33STao Ma } 3531492a8a33STao Ma 3532492a8a33STao Ma /* 3533492a8a33STao Ma * Do CoW for xattr. 3534492a8a33STao Ma */ 3535492a8a33STao Ma int ocfs2_refcount_cow_xattr(struct inode *inode, 3536492a8a33STao Ma struct ocfs2_dinode *di, 3537492a8a33STao Ma struct ocfs2_xattr_value_buf *vb, 3538492a8a33STao Ma struct ocfs2_refcount_tree *ref_tree, 3539492a8a33STao Ma struct buffer_head *ref_root_bh, 3540492a8a33STao Ma u32 cpos, u32 write_len, 3541492a8a33STao Ma struct ocfs2_post_refcount *post) 3542492a8a33STao Ma { 3543492a8a33STao Ma int ret; 3544492a8a33STao Ma struct ocfs2_xattr_value_root *xv = vb->vb_xv; 3545492a8a33STao Ma struct ocfs2_inode_info *oi = OCFS2_I(inode); 3546492a8a33STao Ma struct ocfs2_cow_context *context = NULL; 3547492a8a33STao Ma u32 cow_start, cow_len; 3548492a8a33STao Ma 3549492a8a33STao Ma BUG_ON(!(oi->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL)); 3550492a8a33STao Ma 3551492a8a33STao Ma ret = ocfs2_refcount_cal_cow_clusters(inode, &xv->xr_list, 3552492a8a33STao Ma cpos, write_len, UINT_MAX, 3553492a8a33STao Ma &cow_start, &cow_len); 3554492a8a33STao Ma if (ret) { 3555492a8a33STao Ma mlog_errno(ret); 3556492a8a33STao Ma goto out; 3557492a8a33STao Ma } 3558492a8a33STao Ma 3559492a8a33STao Ma BUG_ON(cow_len == 0); 3560492a8a33STao Ma 3561492a8a33STao Ma context = kzalloc(sizeof(struct ocfs2_cow_context), GFP_NOFS); 3562492a8a33STao Ma if (!context) { 3563492a8a33STao Ma ret = -ENOMEM; 3564492a8a33STao Ma mlog_errno(ret); 3565492a8a33STao Ma goto out; 3566492a8a33STao Ma } 3567492a8a33STao Ma 3568492a8a33STao Ma context->inode = inode; 3569492a8a33STao Ma context->cow_start = cow_start; 3570492a8a33STao Ma context->cow_len = cow_len; 3571492a8a33STao Ma context->ref_tree = ref_tree; 3572492a8a33STao Ma context->ref_root_bh = ref_root_bh;; 3573492a8a33STao Ma context->cow_object = xv; 3574492a8a33STao Ma 3575492a8a33STao Ma context->cow_duplicate_clusters = ocfs2_duplicate_clusters_by_jbd; 3576492a8a33STao Ma /* We need the extra credits for duplicate_clusters by jbd. */ 3577492a8a33STao Ma context->extra_credits = 3578492a8a33STao Ma ocfs2_clusters_to_blocks(inode->i_sb, 1) * cow_len; 3579492a8a33STao Ma context->get_clusters = ocfs2_xattr_value_get_clusters; 3580492a8a33STao Ma context->post_refcount = post; 3581492a8a33STao Ma 3582492a8a33STao Ma ocfs2_init_xattr_value_extent_tree(&context->data_et, 3583492a8a33STao Ma INODE_CACHE(inode), vb); 3584492a8a33STao Ma 3585492a8a33STao Ma ret = ocfs2_replace_cow(context); 3586492a8a33STao Ma if (ret) 3587492a8a33STao Ma mlog_errno(ret); 3588492a8a33STao Ma 3589492a8a33STao Ma out: 3590492a8a33STao Ma kfree(context); 3591492a8a33STao Ma return ret; 3592492a8a33STao Ma } 3593492a8a33STao Ma 3594110a045aSTao Ma /* 3595110a045aSTao Ma * Insert a new extent into refcount tree and mark a extent rec 3596110a045aSTao Ma * as refcounted in the dinode tree. 3597110a045aSTao Ma */ 3598110a045aSTao Ma int ocfs2_add_refcount_flag(struct inode *inode, 3599110a045aSTao Ma struct ocfs2_extent_tree *data_et, 3600110a045aSTao Ma struct ocfs2_caching_info *ref_ci, 3601110a045aSTao Ma struct buffer_head *ref_root_bh, 3602110a045aSTao Ma u32 cpos, u32 p_cluster, u32 num_clusters, 36030129241eSTao Ma struct ocfs2_cached_dealloc_ctxt *dealloc, 36040129241eSTao Ma struct ocfs2_post_refcount *post) 3605110a045aSTao Ma { 3606110a045aSTao Ma int ret; 3607110a045aSTao Ma handle_t *handle; 3608110a045aSTao Ma int credits = 1, ref_blocks = 0; 3609110a045aSTao Ma struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); 3610110a045aSTao Ma struct ocfs2_alloc_context *meta_ac = NULL; 3611110a045aSTao Ma 3612110a045aSTao Ma ret = ocfs2_calc_refcount_meta_credits(inode->i_sb, 3613110a045aSTao Ma ref_ci, ref_root_bh, 3614110a045aSTao Ma p_cluster, num_clusters, 3615110a045aSTao Ma &ref_blocks, &credits); 3616110a045aSTao Ma if (ret) { 3617110a045aSTao Ma mlog_errno(ret); 3618110a045aSTao Ma goto out; 3619110a045aSTao Ma } 3620110a045aSTao Ma 3621110a045aSTao Ma mlog(0, "reserve new metadata %d, credits = %d\n", 3622110a045aSTao Ma ref_blocks, credits); 3623110a045aSTao Ma 3624110a045aSTao Ma if (ref_blocks) { 3625110a045aSTao Ma ret = ocfs2_reserve_new_metadata_blocks(OCFS2_SB(inode->i_sb), 3626110a045aSTao Ma ref_blocks, &meta_ac); 3627110a045aSTao Ma if (ret) { 3628110a045aSTao Ma mlog_errno(ret); 3629110a045aSTao Ma goto out; 3630110a045aSTao Ma } 3631110a045aSTao Ma } 3632110a045aSTao Ma 36330129241eSTao Ma if (post) 36340129241eSTao Ma credits += post->credits; 36350129241eSTao Ma 3636110a045aSTao Ma handle = ocfs2_start_trans(osb, credits); 3637110a045aSTao Ma if (IS_ERR(handle)) { 3638110a045aSTao Ma ret = PTR_ERR(handle); 3639110a045aSTao Ma mlog_errno(ret); 3640110a045aSTao Ma goto out; 3641110a045aSTao Ma } 3642110a045aSTao Ma 3643110a045aSTao Ma ret = ocfs2_mark_extent_refcounted(inode, data_et, handle, 3644110a045aSTao Ma cpos, num_clusters, p_cluster, 3645110a045aSTao Ma meta_ac, dealloc); 3646110a045aSTao Ma if (ret) { 3647110a045aSTao Ma mlog_errno(ret); 3648110a045aSTao Ma goto out_commit; 3649110a045aSTao Ma } 3650110a045aSTao Ma 36517540c1a7STao Ma ret = __ocfs2_increase_refcount(handle, ref_ci, ref_root_bh, 36527540c1a7STao Ma p_cluster, num_clusters, 0, 3653110a045aSTao Ma meta_ac, dealloc); 36540129241eSTao Ma if (ret) { 36550129241eSTao Ma mlog_errno(ret); 36560129241eSTao Ma goto out_commit; 36570129241eSTao Ma } 36580129241eSTao Ma 36590129241eSTao Ma if (post && post->func) { 36600129241eSTao Ma ret = post->func(inode, handle, post->para); 3661110a045aSTao Ma if (ret) 3662110a045aSTao Ma mlog_errno(ret); 36630129241eSTao Ma } 3664110a045aSTao Ma 3665110a045aSTao Ma out_commit: 3666110a045aSTao Ma ocfs2_commit_trans(osb, handle); 3667110a045aSTao Ma out: 3668110a045aSTao Ma if (meta_ac) 3669110a045aSTao Ma ocfs2_free_alloc_context(meta_ac); 3670110a045aSTao Ma return ret; 3671110a045aSTao Ma } 3672110a045aSTao Ma 3673a9063ab9STao Ma static int ocfs2_change_ctime(struct inode *inode, 3674110a045aSTao Ma struct buffer_head *di_bh) 3675110a045aSTao Ma { 3676110a045aSTao Ma int ret; 3677a9063ab9STao Ma handle_t *handle; 3678a9063ab9STao Ma struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; 3679a9063ab9STao Ma 3680a9063ab9STao Ma handle = ocfs2_start_trans(OCFS2_SB(inode->i_sb), 3681a9063ab9STao Ma OCFS2_INODE_UPDATE_CREDITS); 3682a9063ab9STao Ma if (IS_ERR(handle)) { 3683a9063ab9STao Ma ret = PTR_ERR(handle); 3684a9063ab9STao Ma mlog_errno(ret); 3685a9063ab9STao Ma goto out; 3686a9063ab9STao Ma } 3687a9063ab9STao Ma 3688a9063ab9STao Ma ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh, 3689a9063ab9STao Ma OCFS2_JOURNAL_ACCESS_WRITE); 3690a9063ab9STao Ma if (ret) { 3691a9063ab9STao Ma mlog_errno(ret); 3692a9063ab9STao Ma goto out_commit; 3693a9063ab9STao Ma } 3694a9063ab9STao Ma 3695a9063ab9STao Ma inode->i_ctime = CURRENT_TIME; 3696a9063ab9STao Ma di->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); 3697a9063ab9STao Ma di->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); 3698a9063ab9STao Ma 3699a9063ab9STao Ma ocfs2_journal_dirty(handle, di_bh); 3700a9063ab9STao Ma 3701a9063ab9STao Ma out_commit: 3702a9063ab9STao Ma ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); 3703a9063ab9STao Ma out: 3704a9063ab9STao Ma return ret; 3705a9063ab9STao Ma } 3706a9063ab9STao Ma 3707a9063ab9STao Ma static int ocfs2_attach_refcount_tree(struct inode *inode, 3708a9063ab9STao Ma struct buffer_head *di_bh) 3709a9063ab9STao Ma { 3710a9063ab9STao Ma int ret, data_changed = 0; 3711110a045aSTao Ma struct buffer_head *ref_root_bh = NULL; 3712110a045aSTao Ma struct ocfs2_inode_info *oi = OCFS2_I(inode); 3713110a045aSTao Ma struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; 3714110a045aSTao Ma struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); 3715110a045aSTao Ma struct ocfs2_refcount_tree *ref_tree; 3716110a045aSTao Ma unsigned int ext_flags; 3717110a045aSTao Ma loff_t size; 3718110a045aSTao Ma u32 cpos, num_clusters, clusters, p_cluster; 3719110a045aSTao Ma struct ocfs2_cached_dealloc_ctxt dealloc; 3720110a045aSTao Ma struct ocfs2_extent_tree di_et; 3721110a045aSTao Ma 3722110a045aSTao Ma ocfs2_init_dealloc_ctxt(&dealloc); 3723110a045aSTao Ma 3724110a045aSTao Ma if (!(oi->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL)) { 3725110a045aSTao Ma ret = ocfs2_create_refcount_tree(inode, di_bh); 3726110a045aSTao Ma if (ret) { 3727110a045aSTao Ma mlog_errno(ret); 3728110a045aSTao Ma goto out; 3729110a045aSTao Ma } 3730110a045aSTao Ma } 3731110a045aSTao Ma 3732110a045aSTao Ma BUG_ON(!di->i_refcount_loc); 3733110a045aSTao Ma ret = ocfs2_lock_refcount_tree(osb, 3734110a045aSTao Ma le64_to_cpu(di->i_refcount_loc), 1, 3735110a045aSTao Ma &ref_tree, &ref_root_bh); 3736110a045aSTao Ma if (ret) { 3737110a045aSTao Ma mlog_errno(ret); 3738110a045aSTao Ma goto out; 3739110a045aSTao Ma } 3740110a045aSTao Ma 3741110a045aSTao Ma ocfs2_init_dinode_extent_tree(&di_et, INODE_CACHE(inode), di_bh); 3742110a045aSTao Ma 3743110a045aSTao Ma size = i_size_read(inode); 3744110a045aSTao Ma clusters = ocfs2_clusters_for_bytes(inode->i_sb, size); 3745110a045aSTao Ma 3746110a045aSTao Ma cpos = 0; 3747110a045aSTao Ma while (cpos < clusters) { 3748110a045aSTao Ma ret = ocfs2_get_clusters(inode, cpos, &p_cluster, 3749110a045aSTao Ma &num_clusters, &ext_flags); 3750110a045aSTao Ma 3751110a045aSTao Ma if (p_cluster && !(ext_flags & OCFS2_EXT_REFCOUNTED)) { 3752110a045aSTao Ma ret = ocfs2_add_refcount_flag(inode, &di_et, 3753110a045aSTao Ma &ref_tree->rf_ci, 3754110a045aSTao Ma ref_root_bh, cpos, 3755110a045aSTao Ma p_cluster, num_clusters, 37560129241eSTao Ma &dealloc, NULL); 3757110a045aSTao Ma if (ret) { 3758110a045aSTao Ma mlog_errno(ret); 3759a9063ab9STao Ma goto unlock; 3760110a045aSTao Ma } 3761a9063ab9STao Ma 3762a9063ab9STao Ma data_changed = 1; 3763110a045aSTao Ma } 3764110a045aSTao Ma cpos += num_clusters; 3765110a045aSTao Ma } 3766110a045aSTao Ma 37670129241eSTao Ma if (oi->ip_dyn_features & OCFS2_HAS_XATTR_FL) { 37680129241eSTao Ma ret = ocfs2_xattr_attach_refcount_tree(inode, di_bh, 37690129241eSTao Ma &ref_tree->rf_ci, 37700129241eSTao Ma ref_root_bh, 37710129241eSTao Ma &dealloc); 37720129241eSTao Ma if (ret) { 37730129241eSTao Ma mlog_errno(ret); 37740129241eSTao Ma goto unlock; 37750129241eSTao Ma } 37760129241eSTao Ma } 37770129241eSTao Ma 3778a9063ab9STao Ma if (data_changed) { 3779a9063ab9STao Ma ret = ocfs2_change_ctime(inode, di_bh); 3780a9063ab9STao Ma if (ret) 3781a9063ab9STao Ma mlog_errno(ret); 3782a9063ab9STao Ma } 3783a9063ab9STao Ma 3784a9063ab9STao Ma unlock: 3785110a045aSTao Ma ocfs2_unlock_refcount_tree(osb, ref_tree, 1); 3786110a045aSTao Ma brelse(ref_root_bh); 3787110a045aSTao Ma 3788110a045aSTao Ma if (!ret && ocfs2_dealloc_has_cluster(&dealloc)) { 3789110a045aSTao Ma ocfs2_schedule_truncate_log_flush(osb, 1); 3790110a045aSTao Ma ocfs2_run_deallocs(osb, &dealloc); 3791110a045aSTao Ma } 3792110a045aSTao Ma out: 3793110a045aSTao Ma /* 3794110a045aSTao Ma * Empty the extent map so that we may get the right extent 3795110a045aSTao Ma * record from the disk. 3796110a045aSTao Ma */ 3797110a045aSTao Ma ocfs2_extent_map_trunc(inode, 0); 3798110a045aSTao Ma 3799110a045aSTao Ma return ret; 3800110a045aSTao Ma } 3801110a045aSTao Ma 3802110a045aSTao Ma static int ocfs2_add_refcounted_extent(struct inode *inode, 3803110a045aSTao Ma struct ocfs2_extent_tree *et, 3804110a045aSTao Ma struct ocfs2_caching_info *ref_ci, 3805110a045aSTao Ma struct buffer_head *ref_root_bh, 3806110a045aSTao Ma u32 cpos, u32 p_cluster, u32 num_clusters, 3807110a045aSTao Ma unsigned int ext_flags, 3808110a045aSTao Ma struct ocfs2_cached_dealloc_ctxt *dealloc) 3809110a045aSTao Ma { 3810110a045aSTao Ma int ret; 3811110a045aSTao Ma handle_t *handle; 3812110a045aSTao Ma int credits = 0; 3813110a045aSTao Ma struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); 3814110a045aSTao Ma struct ocfs2_alloc_context *meta_ac = NULL; 3815110a045aSTao Ma 3816110a045aSTao Ma ret = ocfs2_lock_refcount_allocators(inode->i_sb, 3817110a045aSTao Ma p_cluster, num_clusters, 3818110a045aSTao Ma et, ref_ci, 3819110a045aSTao Ma ref_root_bh, &meta_ac, 3820110a045aSTao Ma NULL, &credits); 3821110a045aSTao Ma if (ret) { 3822110a045aSTao Ma mlog_errno(ret); 3823110a045aSTao Ma goto out; 3824110a045aSTao Ma } 3825110a045aSTao Ma 3826110a045aSTao Ma handle = ocfs2_start_trans(osb, credits); 3827110a045aSTao Ma if (IS_ERR(handle)) { 3828110a045aSTao Ma ret = PTR_ERR(handle); 3829110a045aSTao Ma mlog_errno(ret); 3830110a045aSTao Ma goto out; 3831110a045aSTao Ma } 3832110a045aSTao Ma 3833110a045aSTao Ma ret = ocfs2_insert_extent(handle, et, cpos, 3834110a045aSTao Ma cpu_to_le64(ocfs2_clusters_to_blocks(inode->i_sb, 3835110a045aSTao Ma p_cluster)), 3836110a045aSTao Ma num_clusters, ext_flags, meta_ac); 3837110a045aSTao Ma if (ret) { 3838110a045aSTao Ma mlog_errno(ret); 3839110a045aSTao Ma goto out_commit; 3840110a045aSTao Ma } 3841110a045aSTao Ma 38422999d12fSTao Ma ret = ocfs2_increase_refcount(handle, ref_ci, ref_root_bh, 3843110a045aSTao Ma p_cluster, num_clusters, 3844110a045aSTao Ma meta_ac, dealloc); 3845110a045aSTao Ma if (ret) 3846110a045aSTao Ma mlog_errno(ret); 3847110a045aSTao Ma 3848110a045aSTao Ma out_commit: 3849110a045aSTao Ma ocfs2_commit_trans(osb, handle); 3850110a045aSTao Ma out: 3851110a045aSTao Ma if (meta_ac) 3852110a045aSTao Ma ocfs2_free_alloc_context(meta_ac); 3853110a045aSTao Ma return ret; 3854110a045aSTao Ma } 3855110a045aSTao Ma 3856110a045aSTao Ma static int ocfs2_duplicate_extent_list(struct inode *s_inode, 3857110a045aSTao Ma struct inode *t_inode, 3858110a045aSTao Ma struct buffer_head *t_bh, 3859110a045aSTao Ma struct ocfs2_caching_info *ref_ci, 3860110a045aSTao Ma struct buffer_head *ref_root_bh, 3861110a045aSTao Ma struct ocfs2_cached_dealloc_ctxt *dealloc) 3862110a045aSTao Ma { 3863110a045aSTao Ma int ret = 0; 3864110a045aSTao Ma u32 p_cluster, num_clusters, clusters, cpos; 3865110a045aSTao Ma loff_t size; 3866110a045aSTao Ma unsigned int ext_flags; 3867110a045aSTao Ma struct ocfs2_extent_tree et; 3868110a045aSTao Ma 3869110a045aSTao Ma ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(t_inode), t_bh); 3870110a045aSTao Ma 3871110a045aSTao Ma size = i_size_read(s_inode); 3872110a045aSTao Ma clusters = ocfs2_clusters_for_bytes(s_inode->i_sb, size); 3873110a045aSTao Ma 3874110a045aSTao Ma cpos = 0; 3875110a045aSTao Ma while (cpos < clusters) { 3876110a045aSTao Ma ret = ocfs2_get_clusters(s_inode, cpos, &p_cluster, 3877110a045aSTao Ma &num_clusters, &ext_flags); 3878110a045aSTao Ma 3879110a045aSTao Ma if (p_cluster) { 3880110a045aSTao Ma ret = ocfs2_add_refcounted_extent(t_inode, &et, 3881110a045aSTao Ma ref_ci, ref_root_bh, 3882110a045aSTao Ma cpos, p_cluster, 3883110a045aSTao Ma num_clusters, 3884110a045aSTao Ma ext_flags, 3885110a045aSTao Ma dealloc); 3886110a045aSTao Ma if (ret) { 3887110a045aSTao Ma mlog_errno(ret); 3888110a045aSTao Ma goto out; 3889110a045aSTao Ma } 3890110a045aSTao Ma } 3891110a045aSTao Ma 3892110a045aSTao Ma cpos += num_clusters; 3893110a045aSTao Ma } 3894110a045aSTao Ma 3895110a045aSTao Ma out: 3896110a045aSTao Ma return ret; 3897110a045aSTao Ma } 3898110a045aSTao Ma 3899a9063ab9STao Ma /* 3900a9063ab9STao Ma * change the new file's attributes to the src. 3901a9063ab9STao Ma * 3902a9063ab9STao Ma * reflink creates a snapshot of a file, that means the attributes 3903a9063ab9STao Ma * must be identical except for three exceptions - nlink, ino, and ctime. 3904a9063ab9STao Ma */ 3905a9063ab9STao Ma static int ocfs2_complete_reflink(struct inode *s_inode, 3906a9063ab9STao Ma struct buffer_head *s_bh, 3907a9063ab9STao Ma struct inode *t_inode, 39080fe9b66cSTao Ma struct buffer_head *t_bh, 39090fe9b66cSTao Ma bool preserve) 3910a9063ab9STao Ma { 3911a9063ab9STao Ma int ret; 3912a9063ab9STao Ma handle_t *handle; 3913a9063ab9STao Ma struct ocfs2_dinode *s_di = (struct ocfs2_dinode *)s_bh->b_data; 3914a9063ab9STao Ma struct ocfs2_dinode *di = (struct ocfs2_dinode *)t_bh->b_data; 3915a9063ab9STao Ma loff_t size = i_size_read(s_inode); 3916a9063ab9STao Ma 3917a9063ab9STao Ma handle = ocfs2_start_trans(OCFS2_SB(t_inode->i_sb), 3918a9063ab9STao Ma OCFS2_INODE_UPDATE_CREDITS); 3919a9063ab9STao Ma if (IS_ERR(handle)) { 3920a9063ab9STao Ma ret = PTR_ERR(handle); 3921a9063ab9STao Ma mlog_errno(ret); 3922a9063ab9STao Ma return ret; 3923a9063ab9STao Ma } 3924a9063ab9STao Ma 3925a9063ab9STao Ma ret = ocfs2_journal_access_di(handle, INODE_CACHE(t_inode), t_bh, 3926a9063ab9STao Ma OCFS2_JOURNAL_ACCESS_WRITE); 3927a9063ab9STao Ma if (ret) { 3928a9063ab9STao Ma mlog_errno(ret); 3929a9063ab9STao Ma goto out_commit; 3930a9063ab9STao Ma } 3931a9063ab9STao Ma 3932a9063ab9STao Ma spin_lock(&OCFS2_I(t_inode)->ip_lock); 3933a9063ab9STao Ma OCFS2_I(t_inode)->ip_clusters = OCFS2_I(s_inode)->ip_clusters; 3934a9063ab9STao Ma OCFS2_I(t_inode)->ip_attr = OCFS2_I(s_inode)->ip_attr; 3935a9063ab9STao Ma OCFS2_I(t_inode)->ip_dyn_features = OCFS2_I(s_inode)->ip_dyn_features; 3936a9063ab9STao Ma spin_unlock(&OCFS2_I(t_inode)->ip_lock); 3937a9063ab9STao Ma i_size_write(t_inode, size); 3938a9063ab9STao Ma 3939a9063ab9STao Ma di->i_xattr_inline_size = s_di->i_xattr_inline_size; 3940a9063ab9STao Ma di->i_clusters = s_di->i_clusters; 3941a9063ab9STao Ma di->i_size = s_di->i_size; 3942a9063ab9STao Ma di->i_dyn_features = s_di->i_dyn_features; 3943a9063ab9STao Ma di->i_attr = s_di->i_attr; 39440fe9b66cSTao Ma 39450fe9b66cSTao Ma if (preserve) { 3946a9063ab9STao Ma di->i_uid = s_di->i_uid; 3947a9063ab9STao Ma di->i_gid = s_di->i_gid; 3948a9063ab9STao Ma di->i_mode = s_di->i_mode; 3949a9063ab9STao Ma 3950a9063ab9STao Ma /* 3951a9063ab9STao Ma * update time. 39520fe9b66cSTao Ma * we want mtime to appear identical to the source and 39530fe9b66cSTao Ma * update ctime. 3954a9063ab9STao Ma */ 3955a9063ab9STao Ma t_inode->i_ctime = CURRENT_TIME; 3956a9063ab9STao Ma 3957a9063ab9STao Ma di->i_ctime = cpu_to_le64(t_inode->i_ctime.tv_sec); 3958a9063ab9STao Ma di->i_ctime_nsec = cpu_to_le32(t_inode->i_ctime.tv_nsec); 3959a9063ab9STao Ma 3960a9063ab9STao Ma t_inode->i_mtime = s_inode->i_mtime; 3961a9063ab9STao Ma di->i_mtime = s_di->i_mtime; 3962a9063ab9STao Ma di->i_mtime_nsec = s_di->i_mtime_nsec; 39630fe9b66cSTao Ma } 3964a9063ab9STao Ma 3965a9063ab9STao Ma ocfs2_journal_dirty(handle, t_bh); 3966a9063ab9STao Ma 3967a9063ab9STao Ma out_commit: 3968a9063ab9STao Ma ocfs2_commit_trans(OCFS2_SB(t_inode->i_sb), handle); 3969a9063ab9STao Ma return ret; 3970a9063ab9STao Ma } 3971a9063ab9STao Ma 3972110a045aSTao Ma static int ocfs2_create_reflink_node(struct inode *s_inode, 3973110a045aSTao Ma struct buffer_head *s_bh, 3974110a045aSTao Ma struct inode *t_inode, 39750fe9b66cSTao Ma struct buffer_head *t_bh, 39760fe9b66cSTao Ma bool preserve) 3977110a045aSTao Ma { 3978110a045aSTao Ma int ret; 3979110a045aSTao Ma struct buffer_head *ref_root_bh = NULL; 3980110a045aSTao Ma struct ocfs2_cached_dealloc_ctxt dealloc; 3981110a045aSTao Ma struct ocfs2_super *osb = OCFS2_SB(s_inode->i_sb); 3982110a045aSTao Ma struct ocfs2_refcount_block *rb; 3983110a045aSTao Ma struct ocfs2_dinode *di = (struct ocfs2_dinode *)s_bh->b_data; 3984110a045aSTao Ma struct ocfs2_refcount_tree *ref_tree; 3985110a045aSTao Ma 3986110a045aSTao Ma ocfs2_init_dealloc_ctxt(&dealloc); 3987110a045aSTao Ma 3988110a045aSTao Ma ret = ocfs2_set_refcount_tree(t_inode, t_bh, 3989110a045aSTao Ma le64_to_cpu(di->i_refcount_loc)); 3990110a045aSTao Ma if (ret) { 3991110a045aSTao Ma mlog_errno(ret); 3992110a045aSTao Ma goto out; 3993110a045aSTao Ma } 3994110a045aSTao Ma 3995110a045aSTao Ma ret = ocfs2_lock_refcount_tree(osb, le64_to_cpu(di->i_refcount_loc), 3996110a045aSTao Ma 1, &ref_tree, &ref_root_bh); 3997110a045aSTao Ma if (ret) { 3998110a045aSTao Ma mlog_errno(ret); 3999110a045aSTao Ma goto out; 4000110a045aSTao Ma } 4001110a045aSTao Ma rb = (struct ocfs2_refcount_block *)ref_root_bh->b_data; 4002110a045aSTao Ma 4003110a045aSTao Ma ret = ocfs2_duplicate_extent_list(s_inode, t_inode, t_bh, 4004110a045aSTao Ma &ref_tree->rf_ci, ref_root_bh, 4005110a045aSTao Ma &dealloc); 4006a9063ab9STao Ma if (ret) { 4007a9063ab9STao Ma mlog_errno(ret); 4008a9063ab9STao Ma goto out_unlock_refcount; 4009a9063ab9STao Ma } 4010a9063ab9STao Ma 40110fe9b66cSTao Ma ret = ocfs2_complete_reflink(s_inode, s_bh, t_inode, t_bh, preserve); 4012110a045aSTao Ma if (ret) 4013110a045aSTao Ma mlog_errno(ret); 4014110a045aSTao Ma 4015a9063ab9STao Ma out_unlock_refcount: 4016110a045aSTao Ma ocfs2_unlock_refcount_tree(osb, ref_tree, 1); 4017110a045aSTao Ma brelse(ref_root_bh); 4018110a045aSTao Ma out: 4019110a045aSTao Ma if (ocfs2_dealloc_has_cluster(&dealloc)) { 4020110a045aSTao Ma ocfs2_schedule_truncate_log_flush(osb, 1); 4021110a045aSTao Ma ocfs2_run_deallocs(osb, &dealloc); 4022110a045aSTao Ma } 4023110a045aSTao Ma 4024110a045aSTao Ma return ret; 4025110a045aSTao Ma } 402609bf27a0STao Ma 402709bf27a0STao Ma static int __ocfs2_reflink(struct dentry *old_dentry, 402809bf27a0STao Ma struct buffer_head *old_bh, 402909bf27a0STao Ma struct inode *new_inode, 403009bf27a0STao Ma bool preserve) 403109bf27a0STao Ma { 403209bf27a0STao Ma int ret; 403309bf27a0STao Ma struct inode *inode = old_dentry->d_inode; 403409bf27a0STao Ma struct buffer_head *new_bh = NULL; 403509bf27a0STao Ma 403609bf27a0STao Ma ret = filemap_fdatawrite(inode->i_mapping); 403709bf27a0STao Ma if (ret) { 403809bf27a0STao Ma mlog_errno(ret); 403909bf27a0STao Ma goto out; 404009bf27a0STao Ma } 404109bf27a0STao Ma 404209bf27a0STao Ma ret = ocfs2_attach_refcount_tree(inode, old_bh); 404309bf27a0STao Ma if (ret) { 404409bf27a0STao Ma mlog_errno(ret); 404509bf27a0STao Ma goto out; 404609bf27a0STao Ma } 404709bf27a0STao Ma 404809bf27a0STao Ma mutex_lock(&new_inode->i_mutex); 404909bf27a0STao Ma ret = ocfs2_inode_lock(new_inode, &new_bh, 1); 405009bf27a0STao Ma if (ret) { 405109bf27a0STao Ma mlog_errno(ret); 405209bf27a0STao Ma goto out_unlock; 405309bf27a0STao Ma } 405409bf27a0STao Ma 405509bf27a0STao Ma ret = ocfs2_create_reflink_node(inode, old_bh, 405609bf27a0STao Ma new_inode, new_bh, preserve); 405709bf27a0STao Ma if (ret) { 405809bf27a0STao Ma mlog_errno(ret); 405909bf27a0STao Ma goto inode_unlock; 406009bf27a0STao Ma } 406109bf27a0STao Ma 406209bf27a0STao Ma if (OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_XATTR_FL) { 406309bf27a0STao Ma ret = ocfs2_reflink_xattrs(inode, old_bh, 406409bf27a0STao Ma new_inode, new_bh, 406509bf27a0STao Ma preserve); 406609bf27a0STao Ma if (ret) 406709bf27a0STao Ma mlog_errno(ret); 406809bf27a0STao Ma } 406909bf27a0STao Ma inode_unlock: 407009bf27a0STao Ma ocfs2_inode_unlock(new_inode, 1); 407109bf27a0STao Ma brelse(new_bh); 407209bf27a0STao Ma out_unlock: 407309bf27a0STao Ma mutex_unlock(&new_inode->i_mutex); 407409bf27a0STao Ma out: 407509bf27a0STao Ma if (!ret) { 407609bf27a0STao Ma ret = filemap_fdatawait(inode->i_mapping); 407709bf27a0STao Ma if (ret) 407809bf27a0STao Ma mlog_errno(ret); 407909bf27a0STao Ma } 408009bf27a0STao Ma return ret; 408109bf27a0STao Ma } 408209bf27a0STao Ma 408309bf27a0STao Ma static int ocfs2_reflink(struct dentry *old_dentry, struct inode *dir, 408409bf27a0STao Ma struct dentry *new_dentry, bool preserve) 408509bf27a0STao Ma { 408609bf27a0STao Ma int error; 408709bf27a0STao Ma struct inode *inode = old_dentry->d_inode; 408809bf27a0STao Ma struct buffer_head *old_bh = NULL; 408909bf27a0STao Ma struct inode *new_orphan_inode = NULL; 409009bf27a0STao Ma 409109bf27a0STao Ma if (!ocfs2_refcount_tree(OCFS2_SB(inode->i_sb))) 409209bf27a0STao Ma return -EOPNOTSUPP; 409309bf27a0STao Ma 409409bf27a0STao Ma error = ocfs2_create_inode_in_orphan(dir, inode->i_mode, 409509bf27a0STao Ma &new_orphan_inode); 409609bf27a0STao Ma if (error) { 409709bf27a0STao Ma mlog_errno(error); 409809bf27a0STao Ma goto out; 409909bf27a0STao Ma } 410009bf27a0STao Ma 410109bf27a0STao Ma error = ocfs2_inode_lock(inode, &old_bh, 1); 410209bf27a0STao Ma if (error) { 410309bf27a0STao Ma mlog_errno(error); 410409bf27a0STao Ma goto out; 410509bf27a0STao Ma } 410609bf27a0STao Ma 410709bf27a0STao Ma down_write(&OCFS2_I(inode)->ip_xattr_sem); 410809bf27a0STao Ma down_write(&OCFS2_I(inode)->ip_alloc_sem); 410909bf27a0STao Ma error = __ocfs2_reflink(old_dentry, old_bh, 411009bf27a0STao Ma new_orphan_inode, preserve); 411109bf27a0STao Ma up_write(&OCFS2_I(inode)->ip_alloc_sem); 411209bf27a0STao Ma up_write(&OCFS2_I(inode)->ip_xattr_sem); 411309bf27a0STao Ma 411409bf27a0STao Ma ocfs2_inode_unlock(inode, 1); 411509bf27a0STao Ma brelse(old_bh); 411609bf27a0STao Ma 411709bf27a0STao Ma if (error) { 411809bf27a0STao Ma mlog_errno(error); 411909bf27a0STao Ma goto out; 412009bf27a0STao Ma } 412109bf27a0STao Ma 412209bf27a0STao Ma /* If the security isn't preserved, we need to re-initialize them. */ 412309bf27a0STao Ma if (!preserve) { 412409bf27a0STao Ma error = ocfs2_init_security_and_acl(dir, new_orphan_inode); 412509bf27a0STao Ma if (error) 412609bf27a0STao Ma mlog_errno(error); 412709bf27a0STao Ma } 412809bf27a0STao Ma out: 412909bf27a0STao Ma if (!error) { 413009bf27a0STao Ma error = ocfs2_mv_orphaned_inode_to_new(dir, new_orphan_inode, 413109bf27a0STao Ma new_dentry); 413209bf27a0STao Ma if (error) 413309bf27a0STao Ma mlog_errno(error); 413409bf27a0STao Ma } 413509bf27a0STao Ma 413609bf27a0STao Ma if (new_orphan_inode) { 413709bf27a0STao Ma /* 413809bf27a0STao Ma * We need to open_unlock the inode no matter whether we 413909bf27a0STao Ma * succeed or not, so that other nodes can delete it later. 414009bf27a0STao Ma */ 414109bf27a0STao Ma ocfs2_open_unlock(new_orphan_inode); 414209bf27a0STao Ma if (error) 414309bf27a0STao Ma iput(new_orphan_inode); 414409bf27a0STao Ma } 414509bf27a0STao Ma 414609bf27a0STao Ma return error; 414709bf27a0STao Ma } 4148