11802d0beSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 2*fa60ce2cSMasahiro Yamada /* 3f2c870e3STao Ma * refcounttree.c 4f2c870e3STao Ma * 5f2c870e3STao Ma * Copyright (C) 2009 Oracle. All rights reserved. 6f2c870e3STao Ma */ 7f2c870e3STao Ma 8e73a819dSTao Ma #include <linux/sort.h> 9f2c870e3STao Ma #include <cluster/masklog.h> 10f2c870e3STao Ma #include "ocfs2.h" 11f2c870e3STao Ma #include "inode.h" 12f2c870e3STao Ma #include "alloc.h" 13f2c870e3STao Ma #include "suballoc.h" 14f2c870e3STao Ma #include "journal.h" 15f2c870e3STao Ma #include "uptodate.h" 16f2c870e3STao Ma #include "super.h" 17f2c870e3STao Ma #include "buffer_head_io.h" 18f2c870e3STao Ma #include "blockcheck.h" 19c732eb16STao Ma #include "refcounttree.h" 208bf396deSTao Ma #include "sysfile.h" 21374a263eSTao Ma #include "dlmglue.h" 22e73a819dSTao Ma #include "extent_map.h" 236f70fa51STao Ma #include "aops.h" 24492a8a33STao Ma #include "xattr.h" 2509bf27a0STao Ma #include "namei.h" 26198aac28STao Ma #include "ocfs2_trace.h" 2729ac8e85SDarrick J. Wong #include "file.h" 286f70fa51STao Ma 296f70fa51STao Ma #include <linux/bio.h> 306f70fa51STao Ma #include <linux/blkdev.h> 316f70fa51STao Ma #include <linux/slab.h> 326f70fa51STao Ma #include <linux/writeback.h> 336f70fa51STao Ma #include <linux/pagevec.h> 346f70fa51STao Ma #include <linux/swap.h> 35bd50873dSTao Ma #include <linux/security.h> 36bd50873dSTao Ma #include <linux/fsnotify.h> 37bd50873dSTao Ma #include <linux/quotaops.h> 38bd50873dSTao Ma #include <linux/namei.h> 39bd50873dSTao Ma #include <linux/mount.h> 40702e5bc6SChristoph Hellwig #include <linux/posix_acl.h> 416f70fa51STao Ma 426f70fa51STao Ma struct ocfs2_cow_context { 436f70fa51STao Ma struct inode *inode; 446f70fa51STao Ma u32 cow_start; 456f70fa51STao Ma u32 cow_len; 46913580b4STao Ma struct ocfs2_extent_tree data_et; 47913580b4STao Ma struct ocfs2_refcount_tree *ref_tree; 486f70fa51STao Ma struct buffer_head *ref_root_bh; 496f70fa51STao Ma struct ocfs2_alloc_context *meta_ac; 506f70fa51STao Ma struct ocfs2_alloc_context *data_ac; 516f70fa51STao Ma struct ocfs2_cached_dealloc_ctxt dealloc; 52492a8a33STao Ma void *cow_object; 53492a8a33STao Ma struct ocfs2_post_refcount *post_refcount; 54492a8a33STao Ma int extra_credits; 55913580b4STao Ma int (*get_clusters)(struct ocfs2_cow_context *context, 56913580b4STao Ma u32 v_cluster, u32 *p_cluster, 57913580b4STao Ma u32 *num_clusters, 58913580b4STao Ma unsigned int *extent_flags); 59913580b4STao Ma int (*cow_duplicate_clusters)(handle_t *handle, 60c7dd3392STiger Yang struct inode *inode, 61913580b4STao Ma u32 cpos, u32 old_cluster, 62913580b4STao Ma u32 new_cluster, u32 new_len); 636f70fa51STao Ma }; 64c732eb16STao Ma 65c732eb16STao Ma static inline struct ocfs2_refcount_tree * 66c732eb16STao Ma cache_info_to_refcount(struct ocfs2_caching_info *ci) 67c732eb16STao Ma { 68c732eb16STao Ma return container_of(ci, struct ocfs2_refcount_tree, rf_ci); 69c732eb16STao Ma } 70f2c870e3STao Ma 71f2c870e3STao Ma static int ocfs2_validate_refcount_block(struct super_block *sb, 72f2c870e3STao Ma struct buffer_head *bh) 73f2c870e3STao Ma { 74f2c870e3STao Ma int rc; 75f2c870e3STao Ma struct ocfs2_refcount_block *rb = 76f2c870e3STao Ma (struct ocfs2_refcount_block *)bh->b_data; 77f2c870e3STao Ma 78198aac28STao Ma trace_ocfs2_validate_refcount_block((unsigned long long)bh->b_blocknr); 79f2c870e3STao Ma 80f2c870e3STao Ma BUG_ON(!buffer_uptodate(bh)); 81f2c870e3STao Ma 82f2c870e3STao Ma /* 83f2c870e3STao Ma * If the ecc fails, we return the error but otherwise 84f2c870e3STao Ma * leave the filesystem running. We know any error is 85f2c870e3STao Ma * local to this block. 86f2c870e3STao Ma */ 87f2c870e3STao Ma rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &rb->rf_check); 88f2c870e3STao Ma if (rc) { 89f2c870e3STao Ma mlog(ML_ERROR, "Checksum failed for refcount block %llu\n", 90f2c870e3STao Ma (unsigned long long)bh->b_blocknr); 91f2c870e3STao Ma return rc; 92f2c870e3STao Ma } 93f2c870e3STao Ma 94f2c870e3STao Ma 95f2c870e3STao Ma if (!OCFS2_IS_VALID_REFCOUNT_BLOCK(rb)) { 9617a5b9abSGoldwyn Rodrigues rc = ocfs2_error(sb, 977ecef14aSJoe Perches "Refcount block #%llu has bad signature %.*s\n", 98f2c870e3STao Ma (unsigned long long)bh->b_blocknr, 7, 99f2c870e3STao Ma rb->rf_signature); 10017a5b9abSGoldwyn Rodrigues goto out; 101f2c870e3STao Ma } 102f2c870e3STao Ma 103f2c870e3STao Ma if (le64_to_cpu(rb->rf_blkno) != bh->b_blocknr) { 10417a5b9abSGoldwyn Rodrigues rc = ocfs2_error(sb, 1057ecef14aSJoe Perches "Refcount block #%llu has an invalid rf_blkno of %llu\n", 106f2c870e3STao Ma (unsigned long long)bh->b_blocknr, 107f2c870e3STao Ma (unsigned long long)le64_to_cpu(rb->rf_blkno)); 10817a5b9abSGoldwyn Rodrigues goto out; 109f2c870e3STao Ma } 110f2c870e3STao Ma 111f2c870e3STao Ma if (le32_to_cpu(rb->rf_fs_generation) != OCFS2_SB(sb)->fs_generation) { 11217a5b9abSGoldwyn Rodrigues rc = ocfs2_error(sb, 1137ecef14aSJoe Perches "Refcount block #%llu has an invalid rf_fs_generation of #%u\n", 114f2c870e3STao Ma (unsigned long long)bh->b_blocknr, 115f2c870e3STao Ma le32_to_cpu(rb->rf_fs_generation)); 11617a5b9abSGoldwyn Rodrigues goto out; 117f2c870e3STao Ma } 11817a5b9abSGoldwyn Rodrigues out: 11917a5b9abSGoldwyn Rodrigues return rc; 120f2c870e3STao Ma } 121f2c870e3STao Ma 122f2c870e3STao Ma static int ocfs2_read_refcount_block(struct ocfs2_caching_info *ci, 123f2c870e3STao Ma u64 rb_blkno, 124f2c870e3STao Ma struct buffer_head **bh) 125f2c870e3STao Ma { 126f2c870e3STao Ma int rc; 127f2c870e3STao Ma struct buffer_head *tmp = *bh; 128f2c870e3STao Ma 129f2c870e3STao Ma rc = ocfs2_read_block(ci, rb_blkno, &tmp, 130f2c870e3STao Ma ocfs2_validate_refcount_block); 131f2c870e3STao Ma 132f2c870e3STao Ma /* If ocfs2_read_block() got us a new bh, pass it up. */ 133f2c870e3STao Ma if (!rc && !*bh) 134f2c870e3STao Ma *bh = tmp; 135f2c870e3STao Ma 136f2c870e3STao Ma return rc; 137f2c870e3STao Ma } 138c732eb16STao Ma 139c732eb16STao Ma static u64 ocfs2_refcount_cache_owner(struct ocfs2_caching_info *ci) 140c732eb16STao Ma { 141c732eb16STao Ma struct ocfs2_refcount_tree *rf = cache_info_to_refcount(ci); 142c732eb16STao Ma 143c732eb16STao Ma return rf->rf_blkno; 144c732eb16STao Ma } 145c732eb16STao Ma 146c732eb16STao Ma static struct super_block * 147c732eb16STao Ma ocfs2_refcount_cache_get_super(struct ocfs2_caching_info *ci) 148c732eb16STao Ma { 149c732eb16STao Ma struct ocfs2_refcount_tree *rf = cache_info_to_refcount(ci); 150c732eb16STao Ma 151c732eb16STao Ma return rf->rf_sb; 152c732eb16STao Ma } 153c732eb16STao Ma 154c732eb16STao Ma static void ocfs2_refcount_cache_lock(struct ocfs2_caching_info *ci) 155185a7321SJules Irenge __acquires(&rf->rf_lock) 156c732eb16STao Ma { 157c732eb16STao Ma struct ocfs2_refcount_tree *rf = cache_info_to_refcount(ci); 158c732eb16STao Ma 159c732eb16STao Ma spin_lock(&rf->rf_lock); 160c732eb16STao Ma } 161c732eb16STao Ma 162c732eb16STao Ma static void ocfs2_refcount_cache_unlock(struct ocfs2_caching_info *ci) 163185a7321SJules Irenge __releases(&rf->rf_lock) 164c732eb16STao Ma { 165c732eb16STao Ma struct ocfs2_refcount_tree *rf = cache_info_to_refcount(ci); 166c732eb16STao Ma 167c732eb16STao Ma spin_unlock(&rf->rf_lock); 168c732eb16STao Ma } 169c732eb16STao Ma 170c732eb16STao Ma static void ocfs2_refcount_cache_io_lock(struct ocfs2_caching_info *ci) 171c732eb16STao Ma { 172c732eb16STao Ma struct ocfs2_refcount_tree *rf = cache_info_to_refcount(ci); 173c732eb16STao Ma 174c732eb16STao Ma mutex_lock(&rf->rf_io_mutex); 175c732eb16STao Ma } 176c732eb16STao Ma 177c732eb16STao Ma static void ocfs2_refcount_cache_io_unlock(struct ocfs2_caching_info *ci) 178c732eb16STao Ma { 179c732eb16STao Ma struct ocfs2_refcount_tree *rf = cache_info_to_refcount(ci); 180c732eb16STao Ma 181c732eb16STao Ma mutex_unlock(&rf->rf_io_mutex); 182c732eb16STao Ma } 183c732eb16STao Ma 184c732eb16STao Ma static const struct ocfs2_caching_operations ocfs2_refcount_caching_ops = { 185c732eb16STao Ma .co_owner = ocfs2_refcount_cache_owner, 186c732eb16STao Ma .co_get_super = ocfs2_refcount_cache_get_super, 187c732eb16STao Ma .co_cache_lock = ocfs2_refcount_cache_lock, 188c732eb16STao Ma .co_cache_unlock = ocfs2_refcount_cache_unlock, 189c732eb16STao Ma .co_io_lock = ocfs2_refcount_cache_io_lock, 190c732eb16STao Ma .co_io_unlock = ocfs2_refcount_cache_io_unlock, 191c732eb16STao Ma }; 192374a263eSTao Ma 193374a263eSTao Ma static struct ocfs2_refcount_tree * 194374a263eSTao Ma ocfs2_find_refcount_tree(struct ocfs2_super *osb, u64 blkno) 195374a263eSTao Ma { 196374a263eSTao Ma struct rb_node *n = osb->osb_rf_lock_tree.rb_node; 197374a263eSTao Ma struct ocfs2_refcount_tree *tree = NULL; 198374a263eSTao Ma 199374a263eSTao Ma while (n) { 200374a263eSTao Ma tree = rb_entry(n, struct ocfs2_refcount_tree, rf_node); 201374a263eSTao Ma 202374a263eSTao Ma if (blkno < tree->rf_blkno) 203374a263eSTao Ma n = n->rb_left; 204374a263eSTao Ma else if (blkno > tree->rf_blkno) 205374a263eSTao Ma n = n->rb_right; 206374a263eSTao Ma else 207374a263eSTao Ma return tree; 208374a263eSTao Ma } 209374a263eSTao Ma 210374a263eSTao Ma return NULL; 211374a263eSTao Ma } 212374a263eSTao Ma 213374a263eSTao Ma /* osb_lock is already locked. */ 214374a263eSTao Ma static void ocfs2_insert_refcount_tree(struct ocfs2_super *osb, 215374a263eSTao Ma struct ocfs2_refcount_tree *new) 216374a263eSTao Ma { 217374a263eSTao Ma u64 rf_blkno = new->rf_blkno; 218374a263eSTao Ma struct rb_node *parent = NULL; 219374a263eSTao Ma struct rb_node **p = &osb->osb_rf_lock_tree.rb_node; 220374a263eSTao Ma struct ocfs2_refcount_tree *tmp; 221374a263eSTao Ma 222374a263eSTao Ma while (*p) { 223374a263eSTao Ma parent = *p; 224374a263eSTao Ma 225374a263eSTao Ma tmp = rb_entry(parent, struct ocfs2_refcount_tree, 226374a263eSTao Ma rf_node); 227374a263eSTao Ma 228374a263eSTao Ma if (rf_blkno < tmp->rf_blkno) 229374a263eSTao Ma p = &(*p)->rb_left; 230374a263eSTao Ma else if (rf_blkno > tmp->rf_blkno) 231374a263eSTao Ma p = &(*p)->rb_right; 232374a263eSTao Ma else { 233374a263eSTao Ma /* This should never happen! */ 234374a263eSTao Ma mlog(ML_ERROR, "Duplicate refcount block %llu found!\n", 235374a263eSTao Ma (unsigned long long)rf_blkno); 236374a263eSTao Ma BUG(); 237374a263eSTao Ma } 238374a263eSTao Ma } 239374a263eSTao Ma 240374a263eSTao Ma rb_link_node(&new->rf_node, parent, p); 241374a263eSTao Ma rb_insert_color(&new->rf_node, &osb->osb_rf_lock_tree); 242374a263eSTao Ma } 243374a263eSTao Ma 244374a263eSTao Ma static void ocfs2_free_refcount_tree(struct ocfs2_refcount_tree *tree) 245374a263eSTao Ma { 246374a263eSTao Ma ocfs2_metadata_cache_exit(&tree->rf_ci); 247374a263eSTao Ma ocfs2_simple_drop_lockres(OCFS2_SB(tree->rf_sb), &tree->rf_lockres); 248374a263eSTao Ma ocfs2_lock_res_free(&tree->rf_lockres); 249374a263eSTao Ma kfree(tree); 250374a263eSTao Ma } 251374a263eSTao Ma 252374a263eSTao Ma static inline void 253374a263eSTao Ma ocfs2_erase_refcount_tree_from_list_no_lock(struct ocfs2_super *osb, 254374a263eSTao Ma struct ocfs2_refcount_tree *tree) 255374a263eSTao Ma { 256374a263eSTao Ma rb_erase(&tree->rf_node, &osb->osb_rf_lock_tree); 257374a263eSTao Ma if (osb->osb_ref_tree_lru && osb->osb_ref_tree_lru == tree) 258374a263eSTao Ma osb->osb_ref_tree_lru = NULL; 259374a263eSTao Ma } 260374a263eSTao Ma 261374a263eSTao Ma static void ocfs2_erase_refcount_tree_from_list(struct ocfs2_super *osb, 262374a263eSTao Ma struct ocfs2_refcount_tree *tree) 263374a263eSTao Ma { 264374a263eSTao Ma spin_lock(&osb->osb_lock); 265374a263eSTao Ma ocfs2_erase_refcount_tree_from_list_no_lock(osb, tree); 266374a263eSTao Ma spin_unlock(&osb->osb_lock); 267374a263eSTao Ma } 268374a263eSTao Ma 26912d4cec9STao Ma static void ocfs2_kref_remove_refcount_tree(struct kref *kref) 270374a263eSTao Ma { 271374a263eSTao Ma struct ocfs2_refcount_tree *tree = 272374a263eSTao Ma container_of(kref, struct ocfs2_refcount_tree, rf_getcnt); 273374a263eSTao Ma 274374a263eSTao Ma ocfs2_free_refcount_tree(tree); 275374a263eSTao Ma } 276374a263eSTao Ma 277374a263eSTao Ma static inline void 278374a263eSTao Ma ocfs2_refcount_tree_get(struct ocfs2_refcount_tree *tree) 279374a263eSTao Ma { 280374a263eSTao Ma kref_get(&tree->rf_getcnt); 281374a263eSTao Ma } 282374a263eSTao Ma 283374a263eSTao Ma static inline void 284374a263eSTao Ma ocfs2_refcount_tree_put(struct ocfs2_refcount_tree *tree) 285374a263eSTao Ma { 286374a263eSTao Ma kref_put(&tree->rf_getcnt, ocfs2_kref_remove_refcount_tree); 287374a263eSTao Ma } 288374a263eSTao Ma 289374a263eSTao Ma static inline void ocfs2_init_refcount_tree_ci(struct ocfs2_refcount_tree *new, 290374a263eSTao Ma struct super_block *sb) 291374a263eSTao Ma { 292374a263eSTao Ma ocfs2_metadata_cache_init(&new->rf_ci, &ocfs2_refcount_caching_ops); 293374a263eSTao Ma mutex_init(&new->rf_io_mutex); 294374a263eSTao Ma new->rf_sb = sb; 295374a263eSTao Ma spin_lock_init(&new->rf_lock); 296374a263eSTao Ma } 297374a263eSTao Ma 298374a263eSTao Ma static inline void ocfs2_init_refcount_tree_lock(struct ocfs2_super *osb, 299374a263eSTao Ma struct ocfs2_refcount_tree *new, 300374a263eSTao Ma u64 rf_blkno, u32 generation) 301374a263eSTao Ma { 302374a263eSTao Ma init_rwsem(&new->rf_sem); 303374a263eSTao Ma ocfs2_refcount_lock_res_init(&new->rf_lockres, osb, 304374a263eSTao Ma rf_blkno, generation); 305374a263eSTao Ma } 306374a263eSTao Ma 3078bf396deSTao Ma static struct ocfs2_refcount_tree* 3088bf396deSTao Ma ocfs2_allocate_refcount_tree(struct ocfs2_super *osb, u64 rf_blkno) 3098bf396deSTao Ma { 3108bf396deSTao Ma struct ocfs2_refcount_tree *new; 3118bf396deSTao Ma 3128bf396deSTao Ma new = kzalloc(sizeof(struct ocfs2_refcount_tree), GFP_NOFS); 3138bf396deSTao Ma if (!new) 3148bf396deSTao Ma return NULL; 3158bf396deSTao Ma 3168bf396deSTao Ma new->rf_blkno = rf_blkno; 3178bf396deSTao Ma kref_init(&new->rf_getcnt); 3188bf396deSTao Ma ocfs2_init_refcount_tree_ci(new, osb->sb); 3198bf396deSTao Ma 3208bf396deSTao Ma return new; 3218bf396deSTao Ma } 3228bf396deSTao Ma 323374a263eSTao Ma static int ocfs2_get_refcount_tree(struct ocfs2_super *osb, u64 rf_blkno, 324374a263eSTao Ma struct ocfs2_refcount_tree **ret_tree) 325374a263eSTao Ma { 326374a263eSTao Ma int ret = 0; 327374a263eSTao Ma struct ocfs2_refcount_tree *tree, *new = NULL; 328374a263eSTao Ma struct buffer_head *ref_root_bh = NULL; 329374a263eSTao Ma struct ocfs2_refcount_block *ref_rb; 330374a263eSTao Ma 331374a263eSTao Ma spin_lock(&osb->osb_lock); 332374a263eSTao Ma if (osb->osb_ref_tree_lru && 333374a263eSTao Ma osb->osb_ref_tree_lru->rf_blkno == rf_blkno) 334374a263eSTao Ma tree = osb->osb_ref_tree_lru; 335374a263eSTao Ma else 336374a263eSTao Ma tree = ocfs2_find_refcount_tree(osb, rf_blkno); 337374a263eSTao Ma if (tree) 338374a263eSTao Ma goto out; 339374a263eSTao Ma 340374a263eSTao Ma spin_unlock(&osb->osb_lock); 341374a263eSTao Ma 3428bf396deSTao Ma new = ocfs2_allocate_refcount_tree(osb, rf_blkno); 343374a263eSTao Ma if (!new) { 344374a263eSTao Ma ret = -ENOMEM; 3458bf396deSTao Ma mlog_errno(ret); 346374a263eSTao Ma return ret; 347374a263eSTao Ma } 348374a263eSTao Ma /* 349374a263eSTao Ma * We need the generation to create the refcount tree lock and since 350374a263eSTao Ma * it isn't changed during the tree modification, we are safe here to 351374a263eSTao Ma * read without protection. 352374a263eSTao Ma * We also have to purge the cache after we create the lock since the 353374a263eSTao Ma * refcount block may have the stale data. It can only be trusted when 354374a263eSTao Ma * we hold the refcount lock. 355374a263eSTao Ma */ 356374a263eSTao Ma ret = ocfs2_read_refcount_block(&new->rf_ci, rf_blkno, &ref_root_bh); 357374a263eSTao Ma if (ret) { 358374a263eSTao Ma mlog_errno(ret); 359374a263eSTao Ma ocfs2_metadata_cache_exit(&new->rf_ci); 360374a263eSTao Ma kfree(new); 361374a263eSTao Ma return ret; 362374a263eSTao Ma } 363374a263eSTao Ma 364374a263eSTao Ma ref_rb = (struct ocfs2_refcount_block *)ref_root_bh->b_data; 365374a263eSTao Ma new->rf_generation = le32_to_cpu(ref_rb->rf_generation); 366374a263eSTao Ma ocfs2_init_refcount_tree_lock(osb, new, rf_blkno, 367374a263eSTao Ma new->rf_generation); 368374a263eSTao Ma ocfs2_metadata_cache_purge(&new->rf_ci); 369374a263eSTao Ma 370374a263eSTao Ma spin_lock(&osb->osb_lock); 371374a263eSTao Ma tree = ocfs2_find_refcount_tree(osb, rf_blkno); 372374a263eSTao Ma if (tree) 373374a263eSTao Ma goto out; 374374a263eSTao Ma 375374a263eSTao Ma ocfs2_insert_refcount_tree(osb, new); 376374a263eSTao Ma 377374a263eSTao Ma tree = new; 378374a263eSTao Ma new = NULL; 379374a263eSTao Ma 380374a263eSTao Ma out: 381374a263eSTao Ma *ret_tree = tree; 382374a263eSTao Ma 383374a263eSTao Ma osb->osb_ref_tree_lru = tree; 384374a263eSTao Ma 385374a263eSTao Ma spin_unlock(&osb->osb_lock); 386374a263eSTao Ma 387374a263eSTao Ma if (new) 388374a263eSTao Ma ocfs2_free_refcount_tree(new); 389374a263eSTao Ma 390374a263eSTao Ma brelse(ref_root_bh); 391374a263eSTao Ma return ret; 392374a263eSTao Ma } 393374a263eSTao Ma 394374a263eSTao Ma static int ocfs2_get_refcount_block(struct inode *inode, u64 *ref_blkno) 395374a263eSTao Ma { 396374a263eSTao Ma int ret; 397374a263eSTao Ma struct buffer_head *di_bh = NULL; 398374a263eSTao Ma struct ocfs2_dinode *di; 399374a263eSTao Ma 400374a263eSTao Ma ret = ocfs2_read_inode_block(inode, &di_bh); 401374a263eSTao Ma if (ret) { 402374a263eSTao Ma mlog_errno(ret); 403374a263eSTao Ma goto out; 404374a263eSTao Ma } 405374a263eSTao Ma 40684e40080SDarrick J. Wong BUG_ON(!ocfs2_is_refcount_inode(inode)); 407374a263eSTao Ma 408374a263eSTao Ma di = (struct ocfs2_dinode *)di_bh->b_data; 409374a263eSTao Ma *ref_blkno = le64_to_cpu(di->i_refcount_loc); 410374a263eSTao Ma brelse(di_bh); 411374a263eSTao Ma out: 412374a263eSTao Ma return ret; 413374a263eSTao Ma } 414374a263eSTao Ma 415374a263eSTao Ma static int __ocfs2_lock_refcount_tree(struct ocfs2_super *osb, 416374a263eSTao Ma struct ocfs2_refcount_tree *tree, int rw) 417374a263eSTao Ma { 418374a263eSTao Ma int ret; 419374a263eSTao Ma 420374a263eSTao Ma ret = ocfs2_refcount_lock(tree, rw); 421374a263eSTao Ma if (ret) { 422374a263eSTao Ma mlog_errno(ret); 423374a263eSTao Ma goto out; 424374a263eSTao Ma } 425374a263eSTao Ma 426374a263eSTao Ma if (rw) 427374a263eSTao Ma down_write(&tree->rf_sem); 428374a263eSTao Ma else 429374a263eSTao Ma down_read(&tree->rf_sem); 430374a263eSTao Ma 431374a263eSTao Ma out: 432374a263eSTao Ma return ret; 433374a263eSTao Ma } 434374a263eSTao Ma 435374a263eSTao Ma /* 436374a263eSTao Ma * Lock the refcount tree pointed by ref_blkno and return the tree. 437374a263eSTao Ma * In most case, we lock the tree and read the refcount block. 438374a263eSTao Ma * So read it here if the caller really needs it. 439374a263eSTao Ma * 440374a263eSTao Ma * If the tree has been re-created by other node, it will free the 441374a263eSTao Ma * old one and re-create it. 442374a263eSTao Ma */ 443374a263eSTao Ma int ocfs2_lock_refcount_tree(struct ocfs2_super *osb, 444374a263eSTao Ma u64 ref_blkno, int rw, 445374a263eSTao Ma struct ocfs2_refcount_tree **ret_tree, 446374a263eSTao Ma struct buffer_head **ref_bh) 447374a263eSTao Ma { 448374a263eSTao Ma int ret, delete_tree = 0; 449374a263eSTao Ma struct ocfs2_refcount_tree *tree = NULL; 450374a263eSTao Ma struct buffer_head *ref_root_bh = NULL; 451374a263eSTao Ma struct ocfs2_refcount_block *rb; 452374a263eSTao Ma 453374a263eSTao Ma again: 454374a263eSTao Ma ret = ocfs2_get_refcount_tree(osb, ref_blkno, &tree); 455374a263eSTao Ma if (ret) { 456374a263eSTao Ma mlog_errno(ret); 457374a263eSTao Ma return ret; 458374a263eSTao Ma } 459374a263eSTao Ma 460374a263eSTao Ma ocfs2_refcount_tree_get(tree); 461374a263eSTao Ma 462374a263eSTao Ma ret = __ocfs2_lock_refcount_tree(osb, tree, rw); 463374a263eSTao Ma if (ret) { 464374a263eSTao Ma mlog_errno(ret); 465374a263eSTao Ma ocfs2_refcount_tree_put(tree); 466374a263eSTao Ma goto out; 467374a263eSTao Ma } 468374a263eSTao Ma 469374a263eSTao Ma ret = ocfs2_read_refcount_block(&tree->rf_ci, tree->rf_blkno, 470374a263eSTao Ma &ref_root_bh); 471374a263eSTao Ma if (ret) { 472374a263eSTao Ma mlog_errno(ret); 473374a263eSTao Ma ocfs2_unlock_refcount_tree(osb, tree, rw); 474374a263eSTao Ma goto out; 475374a263eSTao Ma } 476374a263eSTao Ma 477374a263eSTao Ma rb = (struct ocfs2_refcount_block *)ref_root_bh->b_data; 478374a263eSTao Ma /* 479374a263eSTao Ma * If the refcount block has been freed and re-created, we may need 480374a263eSTao Ma * to recreate the refcount tree also. 481374a263eSTao Ma * 482374a263eSTao Ma * Here we just remove the tree from the rb-tree, and the last 483374a263eSTao Ma * kref holder will unlock and delete this refcount_tree. 484374a263eSTao Ma * Then we goto "again" and ocfs2_get_refcount_tree will create 485374a263eSTao Ma * the new refcount tree for us. 486374a263eSTao Ma */ 487374a263eSTao Ma if (tree->rf_generation != le32_to_cpu(rb->rf_generation)) { 488374a263eSTao Ma if (!tree->rf_removed) { 489374a263eSTao Ma ocfs2_erase_refcount_tree_from_list(osb, tree); 490374a263eSTao Ma tree->rf_removed = 1; 491374a263eSTao Ma delete_tree = 1; 492374a263eSTao Ma } 493374a263eSTao Ma 494374a263eSTao Ma ocfs2_unlock_refcount_tree(osb, tree, rw); 495374a263eSTao Ma /* 496374a263eSTao Ma * We get an extra reference when we create the refcount 497374a263eSTao Ma * tree, so another put will destroy it. 498374a263eSTao Ma */ 499374a263eSTao Ma if (delete_tree) 500374a263eSTao Ma ocfs2_refcount_tree_put(tree); 501374a263eSTao Ma brelse(ref_root_bh); 502374a263eSTao Ma ref_root_bh = NULL; 503374a263eSTao Ma goto again; 504374a263eSTao Ma } 505374a263eSTao Ma 506374a263eSTao Ma *ret_tree = tree; 507374a263eSTao Ma if (ref_bh) { 508374a263eSTao Ma *ref_bh = ref_root_bh; 509374a263eSTao Ma ref_root_bh = NULL; 510374a263eSTao Ma } 511374a263eSTao Ma out: 512374a263eSTao Ma brelse(ref_root_bh); 513374a263eSTao Ma return ret; 514374a263eSTao Ma } 515374a263eSTao Ma 516374a263eSTao Ma void ocfs2_unlock_refcount_tree(struct ocfs2_super *osb, 517374a263eSTao Ma struct ocfs2_refcount_tree *tree, int rw) 518374a263eSTao Ma { 519374a263eSTao Ma if (rw) 520374a263eSTao Ma up_write(&tree->rf_sem); 521374a263eSTao Ma else 522374a263eSTao Ma up_read(&tree->rf_sem); 523374a263eSTao Ma 524374a263eSTao Ma ocfs2_refcount_unlock(tree, rw); 525374a263eSTao Ma ocfs2_refcount_tree_put(tree); 526374a263eSTao Ma } 527374a263eSTao Ma 528374a263eSTao Ma void ocfs2_purge_refcount_trees(struct ocfs2_super *osb) 529374a263eSTao Ma { 530374a263eSTao Ma struct rb_node *node; 531374a263eSTao Ma struct ocfs2_refcount_tree *tree; 532374a263eSTao Ma struct rb_root *root = &osb->osb_rf_lock_tree; 533374a263eSTao Ma 534374a263eSTao Ma while ((node = rb_last(root)) != NULL) { 535374a263eSTao Ma tree = rb_entry(node, struct ocfs2_refcount_tree, rf_node); 536374a263eSTao Ma 537198aac28STao Ma trace_ocfs2_purge_refcount_trees( 538374a263eSTao Ma (unsigned long long) tree->rf_blkno); 539374a263eSTao Ma 540374a263eSTao Ma rb_erase(&tree->rf_node, root); 541374a263eSTao Ma ocfs2_free_refcount_tree(tree); 542374a263eSTao Ma } 543374a263eSTao Ma } 5448bf396deSTao Ma 5458bf396deSTao Ma /* 5468bf396deSTao Ma * Create a refcount tree for an inode. 5478bf396deSTao Ma * We take for granted that the inode is already locked. 5488bf396deSTao Ma */ 5498bf396deSTao Ma static int ocfs2_create_refcount_tree(struct inode *inode, 5508bf396deSTao Ma struct buffer_head *di_bh) 5518bf396deSTao Ma { 5528bf396deSTao Ma int ret; 5538bf396deSTao Ma handle_t *handle = NULL; 5548bf396deSTao Ma struct ocfs2_alloc_context *meta_ac = NULL; 5558bf396deSTao Ma struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; 5568bf396deSTao Ma struct ocfs2_inode_info *oi = OCFS2_I(inode); 5578bf396deSTao Ma struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); 5588bf396deSTao Ma struct buffer_head *new_bh = NULL; 5598bf396deSTao Ma struct ocfs2_refcount_block *rb; 5608bf396deSTao Ma struct ocfs2_refcount_tree *new_tree = NULL, *tree = NULL; 5618bf396deSTao Ma u16 suballoc_bit_start; 5628bf396deSTao Ma u32 num_got; 5632b6cb576SJoel Becker u64 suballoc_loc, first_blkno; 5648bf396deSTao Ma 56584e40080SDarrick J. Wong BUG_ON(ocfs2_is_refcount_inode(inode)); 5668bf396deSTao Ma 567198aac28STao Ma trace_ocfs2_create_refcount_tree( 568d324cd4cSpiaojun (unsigned long long)oi->ip_blkno); 5698bf396deSTao Ma 5708bf396deSTao Ma ret = ocfs2_reserve_new_metadata_blocks(osb, 1, &meta_ac); 5718bf396deSTao Ma if (ret) { 5728bf396deSTao Ma mlog_errno(ret); 5738bf396deSTao Ma goto out; 5748bf396deSTao Ma } 5758bf396deSTao Ma 5768bf396deSTao Ma handle = ocfs2_start_trans(osb, OCFS2_REFCOUNT_TREE_CREATE_CREDITS); 5778bf396deSTao Ma if (IS_ERR(handle)) { 5788bf396deSTao Ma ret = PTR_ERR(handle); 5798bf396deSTao Ma mlog_errno(ret); 5808bf396deSTao Ma goto out; 5818bf396deSTao Ma } 5828bf396deSTao Ma 5838bf396deSTao Ma ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh, 5848bf396deSTao Ma OCFS2_JOURNAL_ACCESS_WRITE); 5858bf396deSTao Ma if (ret) { 5868bf396deSTao Ma mlog_errno(ret); 5878bf396deSTao Ma goto out_commit; 5888bf396deSTao Ma } 5898bf396deSTao Ma 5902b6cb576SJoel Becker ret = ocfs2_claim_metadata(handle, meta_ac, 1, &suballoc_loc, 5918bf396deSTao Ma &suballoc_bit_start, &num_got, 5928bf396deSTao Ma &first_blkno); 5938bf396deSTao Ma if (ret) { 5948bf396deSTao Ma mlog_errno(ret); 5958bf396deSTao Ma goto out_commit; 5968bf396deSTao Ma } 5978bf396deSTao Ma 5988bf396deSTao Ma new_tree = ocfs2_allocate_refcount_tree(osb, first_blkno); 5998bf396deSTao Ma if (!new_tree) { 6008bf396deSTao Ma ret = -ENOMEM; 6018bf396deSTao Ma mlog_errno(ret); 6028bf396deSTao Ma goto out_commit; 6038bf396deSTao Ma } 6048bf396deSTao Ma 6058bf396deSTao Ma new_bh = sb_getblk(inode->i_sb, first_blkno); 60658796207SRui Xiang if (!new_bh) { 60758796207SRui Xiang ret = -ENOMEM; 60858796207SRui Xiang mlog_errno(ret); 60958796207SRui Xiang goto out_commit; 61058796207SRui Xiang } 6118bf396deSTao Ma ocfs2_set_new_buffer_uptodate(&new_tree->rf_ci, new_bh); 6128bf396deSTao Ma 6138bf396deSTao Ma ret = ocfs2_journal_access_rb(handle, &new_tree->rf_ci, new_bh, 6148bf396deSTao Ma OCFS2_JOURNAL_ACCESS_CREATE); 6158bf396deSTao Ma if (ret) { 6168bf396deSTao Ma mlog_errno(ret); 6178bf396deSTao Ma goto out_commit; 6188bf396deSTao Ma } 6198bf396deSTao Ma 6208bf396deSTao Ma /* Initialize ocfs2_refcount_block. */ 6218bf396deSTao Ma rb = (struct ocfs2_refcount_block *)new_bh->b_data; 6228bf396deSTao Ma memset(rb, 0, inode->i_sb->s_blocksize); 6238bf396deSTao Ma strcpy((void *)rb, OCFS2_REFCOUNT_BLOCK_SIGNATURE); 624b89c5428STiger Yang rb->rf_suballoc_slot = cpu_to_le16(meta_ac->ac_alloc_slot); 6252b6cb576SJoel Becker rb->rf_suballoc_loc = cpu_to_le64(suballoc_loc); 6268bf396deSTao Ma rb->rf_suballoc_bit = cpu_to_le16(suballoc_bit_start); 6278bf396deSTao Ma rb->rf_fs_generation = cpu_to_le32(osb->fs_generation); 6288bf396deSTao Ma rb->rf_blkno = cpu_to_le64(first_blkno); 6298bf396deSTao Ma rb->rf_count = cpu_to_le32(1); 6308bf396deSTao Ma rb->rf_records.rl_count = 6318bf396deSTao Ma cpu_to_le16(ocfs2_refcount_recs_per_rb(osb->sb)); 6328bf396deSTao Ma spin_lock(&osb->osb_lock); 6338bf396deSTao Ma rb->rf_generation = osb->s_next_generation++; 6348bf396deSTao Ma spin_unlock(&osb->osb_lock); 6358bf396deSTao Ma 6368bf396deSTao Ma ocfs2_journal_dirty(handle, new_bh); 6378bf396deSTao Ma 6388bf396deSTao Ma spin_lock(&oi->ip_lock); 6398bf396deSTao Ma oi->ip_dyn_features |= OCFS2_HAS_REFCOUNT_FL; 6408bf396deSTao Ma di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); 6418bf396deSTao Ma di->i_refcount_loc = cpu_to_le64(first_blkno); 6428bf396deSTao Ma spin_unlock(&oi->ip_lock); 6438bf396deSTao Ma 644198aac28STao Ma trace_ocfs2_create_refcount_tree_blkno((unsigned long long)first_blkno); 6458bf396deSTao Ma 6468bf396deSTao Ma ocfs2_journal_dirty(handle, di_bh); 6478bf396deSTao Ma 6488bf396deSTao Ma /* 6498bf396deSTao Ma * We have to init the tree lock here since it will use 6508bf396deSTao Ma * the generation number to create it. 6518bf396deSTao Ma */ 6528bf396deSTao Ma new_tree->rf_generation = le32_to_cpu(rb->rf_generation); 6538bf396deSTao Ma ocfs2_init_refcount_tree_lock(osb, new_tree, first_blkno, 6548bf396deSTao Ma new_tree->rf_generation); 6558bf396deSTao Ma 6568bf396deSTao Ma spin_lock(&osb->osb_lock); 6578bf396deSTao Ma tree = ocfs2_find_refcount_tree(osb, first_blkno); 6588bf396deSTao Ma 6598bf396deSTao Ma /* 6608bf396deSTao Ma * We've just created a new refcount tree in this block. If 6618bf396deSTao Ma * we found a refcount tree on the ocfs2_super, it must be 6628bf396deSTao Ma * one we just deleted. We free the old tree before 6638bf396deSTao Ma * inserting the new tree. 6648bf396deSTao Ma */ 6658bf396deSTao Ma BUG_ON(tree && tree->rf_generation == new_tree->rf_generation); 6668bf396deSTao Ma if (tree) 6678bf396deSTao Ma ocfs2_erase_refcount_tree_from_list_no_lock(osb, tree); 6688bf396deSTao Ma ocfs2_insert_refcount_tree(osb, new_tree); 6698bf396deSTao Ma spin_unlock(&osb->osb_lock); 6708bf396deSTao Ma new_tree = NULL; 6718bf396deSTao Ma if (tree) 6728bf396deSTao Ma ocfs2_refcount_tree_put(tree); 6738bf396deSTao Ma 6748bf396deSTao Ma out_commit: 6758bf396deSTao Ma ocfs2_commit_trans(osb, handle); 6768bf396deSTao Ma 6778bf396deSTao Ma out: 6788bf396deSTao Ma if (new_tree) { 6798bf396deSTao Ma ocfs2_metadata_cache_exit(&new_tree->rf_ci); 6808bf396deSTao Ma kfree(new_tree); 6818bf396deSTao Ma } 6828bf396deSTao Ma 6838bf396deSTao Ma brelse(new_bh); 6848bf396deSTao Ma if (meta_ac) 6858bf396deSTao Ma ocfs2_free_alloc_context(meta_ac); 6868bf396deSTao Ma 6878bf396deSTao Ma return ret; 6888bf396deSTao Ma } 6898bf396deSTao Ma 6908bf396deSTao Ma static int ocfs2_set_refcount_tree(struct inode *inode, 6918bf396deSTao Ma struct buffer_head *di_bh, 6928bf396deSTao Ma u64 refcount_loc) 6938bf396deSTao Ma { 6948bf396deSTao Ma int ret; 6958bf396deSTao Ma handle_t *handle = NULL; 6968bf396deSTao Ma struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; 6978bf396deSTao Ma struct ocfs2_inode_info *oi = OCFS2_I(inode); 6988bf396deSTao Ma struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); 6998bf396deSTao Ma struct buffer_head *ref_root_bh = NULL; 7008bf396deSTao Ma struct ocfs2_refcount_block *rb; 7018bf396deSTao Ma struct ocfs2_refcount_tree *ref_tree; 7028bf396deSTao Ma 70384e40080SDarrick J. Wong BUG_ON(ocfs2_is_refcount_inode(inode)); 7048bf396deSTao Ma 7058bf396deSTao Ma ret = ocfs2_lock_refcount_tree(osb, refcount_loc, 1, 7068bf396deSTao Ma &ref_tree, &ref_root_bh); 7078bf396deSTao Ma if (ret) { 7088bf396deSTao Ma mlog_errno(ret); 7098bf396deSTao Ma return ret; 7108bf396deSTao Ma } 7118bf396deSTao Ma 7128bf396deSTao Ma handle = ocfs2_start_trans(osb, OCFS2_REFCOUNT_TREE_SET_CREDITS); 7138bf396deSTao Ma if (IS_ERR(handle)) { 7148bf396deSTao Ma ret = PTR_ERR(handle); 7158bf396deSTao Ma mlog_errno(ret); 7168bf396deSTao Ma goto out; 7178bf396deSTao Ma } 7188bf396deSTao Ma 7198bf396deSTao Ma ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh, 7208bf396deSTao Ma OCFS2_JOURNAL_ACCESS_WRITE); 7218bf396deSTao Ma if (ret) { 7228bf396deSTao Ma mlog_errno(ret); 7238bf396deSTao Ma goto out_commit; 7248bf396deSTao Ma } 7258bf396deSTao Ma 7268bf396deSTao Ma ret = ocfs2_journal_access_rb(handle, &ref_tree->rf_ci, ref_root_bh, 7278bf396deSTao Ma OCFS2_JOURNAL_ACCESS_WRITE); 7288bf396deSTao Ma if (ret) { 7298bf396deSTao Ma mlog_errno(ret); 7308bf396deSTao Ma goto out_commit; 7318bf396deSTao Ma } 7328bf396deSTao Ma 7338bf396deSTao Ma rb = (struct ocfs2_refcount_block *)ref_root_bh->b_data; 7348bf396deSTao Ma le32_add_cpu(&rb->rf_count, 1); 7358bf396deSTao Ma 7368bf396deSTao Ma ocfs2_journal_dirty(handle, ref_root_bh); 7378bf396deSTao Ma 7388bf396deSTao Ma spin_lock(&oi->ip_lock); 7398bf396deSTao Ma oi->ip_dyn_features |= OCFS2_HAS_REFCOUNT_FL; 7408bf396deSTao Ma di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); 7418bf396deSTao Ma di->i_refcount_loc = cpu_to_le64(refcount_loc); 7428bf396deSTao Ma spin_unlock(&oi->ip_lock); 7438bf396deSTao Ma ocfs2_journal_dirty(handle, di_bh); 7448bf396deSTao Ma 7458bf396deSTao Ma out_commit: 7468bf396deSTao Ma ocfs2_commit_trans(osb, handle); 7478bf396deSTao Ma out: 7488bf396deSTao Ma ocfs2_unlock_refcount_tree(osb, ref_tree, 1); 7498bf396deSTao Ma brelse(ref_root_bh); 7508bf396deSTao Ma 7518bf396deSTao Ma return ret; 7528bf396deSTao Ma } 7538bf396deSTao Ma 7548bf396deSTao Ma int ocfs2_remove_refcount_tree(struct inode *inode, struct buffer_head *di_bh) 7558bf396deSTao Ma { 7568bf396deSTao Ma int ret, delete_tree = 0; 7578bf396deSTao Ma handle_t *handle = NULL; 7588bf396deSTao Ma struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; 7598bf396deSTao Ma struct ocfs2_inode_info *oi = OCFS2_I(inode); 7608bf396deSTao Ma struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); 7618bf396deSTao Ma struct ocfs2_refcount_block *rb; 7628bf396deSTao Ma struct inode *alloc_inode = NULL; 7638bf396deSTao Ma struct buffer_head *alloc_bh = NULL; 7648bf396deSTao Ma struct buffer_head *blk_bh = NULL; 7658bf396deSTao Ma struct ocfs2_refcount_tree *ref_tree; 7668bf396deSTao Ma int credits = OCFS2_REFCOUNT_TREE_REMOVE_CREDITS; 7678bf396deSTao Ma u64 blk = 0, bg_blkno = 0, ref_blkno = le64_to_cpu(di->i_refcount_loc); 7688bf396deSTao Ma u16 bit = 0; 7698bf396deSTao Ma 77084e40080SDarrick J. Wong if (!ocfs2_is_refcount_inode(inode)) 7718bf396deSTao Ma return 0; 7728bf396deSTao Ma 7738bf396deSTao Ma BUG_ON(!ref_blkno); 7748bf396deSTao Ma ret = ocfs2_lock_refcount_tree(osb, ref_blkno, 1, &ref_tree, &blk_bh); 7758bf396deSTao Ma if (ret) { 7768bf396deSTao Ma mlog_errno(ret); 7778bf396deSTao Ma return ret; 7788bf396deSTao Ma } 7798bf396deSTao Ma 7808bf396deSTao Ma rb = (struct ocfs2_refcount_block *)blk_bh->b_data; 7818bf396deSTao Ma 7828bf396deSTao Ma /* 7838bf396deSTao Ma * If we are the last user, we need to free the block. 7848bf396deSTao Ma * So lock the allocator ahead. 7858bf396deSTao Ma */ 7868bf396deSTao Ma if (le32_to_cpu(rb->rf_count) == 1) { 7878bf396deSTao Ma blk = le64_to_cpu(rb->rf_blkno); 7888bf396deSTao Ma bit = le16_to_cpu(rb->rf_suballoc_bit); 78974380c47STao Ma if (rb->rf_suballoc_loc) 79074380c47STao Ma bg_blkno = le64_to_cpu(rb->rf_suballoc_loc); 79174380c47STao Ma else 7928bf396deSTao Ma bg_blkno = ocfs2_which_suballoc_group(blk, bit); 7938bf396deSTao Ma 7948bf396deSTao Ma alloc_inode = ocfs2_get_system_file_inode(osb, 7958bf396deSTao Ma EXTENT_ALLOC_SYSTEM_INODE, 7968bf396deSTao Ma le16_to_cpu(rb->rf_suballoc_slot)); 7978bf396deSTao Ma if (!alloc_inode) { 7988bf396deSTao Ma ret = -ENOMEM; 7998bf396deSTao Ma mlog_errno(ret); 8008bf396deSTao Ma goto out; 8018bf396deSTao Ma } 8025955102cSAl Viro inode_lock(alloc_inode); 8038bf396deSTao Ma 8048bf396deSTao Ma ret = ocfs2_inode_lock(alloc_inode, &alloc_bh, 1); 8058bf396deSTao Ma if (ret) { 8068bf396deSTao Ma mlog_errno(ret); 8078bf396deSTao Ma goto out_mutex; 8088bf396deSTao Ma } 8098bf396deSTao Ma 8108bf396deSTao Ma credits += OCFS2_SUBALLOC_FREE; 8118bf396deSTao Ma } 8128bf396deSTao Ma 8138bf396deSTao Ma handle = ocfs2_start_trans(osb, credits); 8148bf396deSTao Ma if (IS_ERR(handle)) { 8158bf396deSTao Ma ret = PTR_ERR(handle); 8168bf396deSTao Ma mlog_errno(ret); 8178bf396deSTao Ma goto out_unlock; 8188bf396deSTao Ma } 8198bf396deSTao Ma 8208bf396deSTao Ma ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh, 8218bf396deSTao Ma OCFS2_JOURNAL_ACCESS_WRITE); 8228bf396deSTao Ma if (ret) { 8238bf396deSTao Ma mlog_errno(ret); 8248bf396deSTao Ma goto out_commit; 8258bf396deSTao Ma } 8268bf396deSTao Ma 8278bf396deSTao Ma ret = ocfs2_journal_access_rb(handle, &ref_tree->rf_ci, blk_bh, 8288bf396deSTao Ma OCFS2_JOURNAL_ACCESS_WRITE); 8298bf396deSTao Ma if (ret) { 8308bf396deSTao Ma mlog_errno(ret); 8318bf396deSTao Ma goto out_commit; 8328bf396deSTao Ma } 8338bf396deSTao Ma 8348bf396deSTao Ma spin_lock(&oi->ip_lock); 8358bf396deSTao Ma oi->ip_dyn_features &= ~OCFS2_HAS_REFCOUNT_FL; 8368bf396deSTao Ma di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); 8378bf396deSTao Ma di->i_refcount_loc = 0; 8388bf396deSTao Ma spin_unlock(&oi->ip_lock); 8398bf396deSTao Ma ocfs2_journal_dirty(handle, di_bh); 8408bf396deSTao Ma 8418bf396deSTao Ma le32_add_cpu(&rb->rf_count , -1); 8428bf396deSTao Ma ocfs2_journal_dirty(handle, blk_bh); 8438bf396deSTao Ma 8448bf396deSTao Ma if (!rb->rf_count) { 8458bf396deSTao Ma delete_tree = 1; 8468bf396deSTao Ma ocfs2_erase_refcount_tree_from_list(osb, ref_tree); 8478bf396deSTao Ma ret = ocfs2_free_suballoc_bits(handle, alloc_inode, 8488bf396deSTao Ma alloc_bh, bit, bg_blkno, 1); 8498bf396deSTao Ma if (ret) 8508bf396deSTao Ma mlog_errno(ret); 8518bf396deSTao Ma } 8528bf396deSTao Ma 8538bf396deSTao Ma out_commit: 8548bf396deSTao Ma ocfs2_commit_trans(osb, handle); 8558bf396deSTao Ma out_unlock: 8568bf396deSTao Ma if (alloc_inode) { 8578bf396deSTao Ma ocfs2_inode_unlock(alloc_inode, 1); 8588bf396deSTao Ma brelse(alloc_bh); 8598bf396deSTao Ma } 8608bf396deSTao Ma out_mutex: 8618bf396deSTao Ma if (alloc_inode) { 8625955102cSAl Viro inode_unlock(alloc_inode); 8638bf396deSTao Ma iput(alloc_inode); 8648bf396deSTao Ma } 8658bf396deSTao Ma out: 8668bf396deSTao Ma ocfs2_unlock_refcount_tree(osb, ref_tree, 1); 8678bf396deSTao Ma if (delete_tree) 8688bf396deSTao Ma ocfs2_refcount_tree_put(ref_tree); 8698bf396deSTao Ma brelse(blk_bh); 8708bf396deSTao Ma 8718bf396deSTao Ma return ret; 8728bf396deSTao Ma } 873e73a819dSTao Ma 874e73a819dSTao Ma static void ocfs2_find_refcount_rec_in_rl(struct ocfs2_caching_info *ci, 875e73a819dSTao Ma struct buffer_head *ref_leaf_bh, 876e73a819dSTao Ma u64 cpos, unsigned int len, 877e73a819dSTao Ma struct ocfs2_refcount_rec *ret_rec, 878e73a819dSTao Ma int *index) 879e73a819dSTao Ma { 880e73a819dSTao Ma int i = 0; 881e73a819dSTao Ma struct ocfs2_refcount_block *rb = 882e73a819dSTao Ma (struct ocfs2_refcount_block *)ref_leaf_bh->b_data; 883e73a819dSTao Ma struct ocfs2_refcount_rec *rec = NULL; 884e73a819dSTao Ma 885e73a819dSTao Ma for (; i < le16_to_cpu(rb->rf_records.rl_used); i++) { 886e73a819dSTao Ma rec = &rb->rf_records.rl_recs[i]; 887e73a819dSTao Ma 888e73a819dSTao Ma if (le64_to_cpu(rec->r_cpos) + 889e73a819dSTao Ma le32_to_cpu(rec->r_clusters) <= cpos) 890e73a819dSTao Ma continue; 891e73a819dSTao Ma else if (le64_to_cpu(rec->r_cpos) > cpos) 892e73a819dSTao Ma break; 893e73a819dSTao Ma 894e73a819dSTao Ma /* ok, cpos fail in this rec. Just return. */ 895e73a819dSTao Ma if (ret_rec) 896e73a819dSTao Ma *ret_rec = *rec; 897e73a819dSTao Ma goto out; 898e73a819dSTao Ma } 899e73a819dSTao Ma 900e73a819dSTao Ma if (ret_rec) { 901e73a819dSTao Ma /* We meet with a hole here, so fake the rec. */ 902e73a819dSTao Ma ret_rec->r_cpos = cpu_to_le64(cpos); 903e73a819dSTao Ma ret_rec->r_refcount = 0; 904e73a819dSTao Ma if (i < le16_to_cpu(rb->rf_records.rl_used) && 905e73a819dSTao Ma le64_to_cpu(rec->r_cpos) < cpos + len) 906e73a819dSTao Ma ret_rec->r_clusters = 907e73a819dSTao Ma cpu_to_le32(le64_to_cpu(rec->r_cpos) - cpos); 908e73a819dSTao Ma else 909e73a819dSTao Ma ret_rec->r_clusters = cpu_to_le32(len); 910e73a819dSTao Ma } 911e73a819dSTao Ma 912e73a819dSTao Ma out: 913e73a819dSTao Ma *index = i; 914e73a819dSTao Ma } 915e73a819dSTao Ma 916e73a819dSTao Ma /* 9178b2c0dbaSTao Ma * Try to remove refcount tree. The mechanism is: 9188b2c0dbaSTao Ma * 1) Check whether i_clusters == 0, if no, exit. 9198b2c0dbaSTao Ma * 2) check whether we have i_xattr_loc in dinode. if yes, exit. 9208b2c0dbaSTao Ma * 3) Check whether we have inline xattr stored outside, if yes, exit. 9218b2c0dbaSTao Ma * 4) Remove the tree. 9228b2c0dbaSTao Ma */ 9238b2c0dbaSTao Ma int ocfs2_try_remove_refcount_tree(struct inode *inode, 9248b2c0dbaSTao Ma struct buffer_head *di_bh) 9258b2c0dbaSTao Ma { 9268b2c0dbaSTao Ma int ret; 9278b2c0dbaSTao Ma struct ocfs2_inode_info *oi = OCFS2_I(inode); 9288b2c0dbaSTao Ma struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; 9298b2c0dbaSTao Ma 9308b2c0dbaSTao Ma down_write(&oi->ip_xattr_sem); 9318b2c0dbaSTao Ma down_write(&oi->ip_alloc_sem); 9328b2c0dbaSTao Ma 9338b2c0dbaSTao Ma if (oi->ip_clusters) 9348b2c0dbaSTao Ma goto out; 9358b2c0dbaSTao Ma 9368b2c0dbaSTao Ma if ((oi->ip_dyn_features & OCFS2_HAS_XATTR_FL) && di->i_xattr_loc) 9378b2c0dbaSTao Ma goto out; 9388b2c0dbaSTao Ma 9398b2c0dbaSTao Ma if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL && 9408b2c0dbaSTao Ma ocfs2_has_inline_xattr_value_outside(inode, di)) 9418b2c0dbaSTao Ma goto out; 9428b2c0dbaSTao Ma 9438b2c0dbaSTao Ma ret = ocfs2_remove_refcount_tree(inode, di_bh); 9448b2c0dbaSTao Ma if (ret) 9458b2c0dbaSTao Ma mlog_errno(ret); 9468b2c0dbaSTao Ma out: 9478b2c0dbaSTao Ma up_write(&oi->ip_alloc_sem); 9488b2c0dbaSTao Ma up_write(&oi->ip_xattr_sem); 9498b2c0dbaSTao Ma return 0; 9508b2c0dbaSTao Ma } 9518b2c0dbaSTao Ma 9528b2c0dbaSTao Ma /* 95338a04e43STao Ma * Find the end range for a leaf refcount block indicated by 95438a04e43STao Ma * el->l_recs[index].e_blkno. 95538a04e43STao Ma */ 95638a04e43STao Ma static int ocfs2_get_refcount_cpos_end(struct ocfs2_caching_info *ci, 95738a04e43STao Ma struct buffer_head *ref_root_bh, 95838a04e43STao Ma struct ocfs2_extent_block *eb, 95938a04e43STao Ma struct ocfs2_extent_list *el, 96038a04e43STao Ma int index, u32 *cpos_end) 96138a04e43STao Ma { 96238a04e43STao Ma int ret, i, subtree_root; 96338a04e43STao Ma u32 cpos; 96438a04e43STao Ma u64 blkno; 96538a04e43STao Ma struct super_block *sb = ocfs2_metadata_cache_get_super(ci); 96638a04e43STao Ma struct ocfs2_path *left_path = NULL, *right_path = NULL; 96738a04e43STao Ma struct ocfs2_extent_tree et; 96838a04e43STao Ma struct ocfs2_extent_list *tmp_el; 96938a04e43STao Ma 97038a04e43STao Ma if (index < le16_to_cpu(el->l_next_free_rec) - 1) { 97138a04e43STao Ma /* 97238a04e43STao Ma * We have a extent rec after index, so just use the e_cpos 97338a04e43STao Ma * of the next extent rec. 97438a04e43STao Ma */ 97538a04e43STao Ma *cpos_end = le32_to_cpu(el->l_recs[index+1].e_cpos); 97638a04e43STao Ma return 0; 97738a04e43STao Ma } 97838a04e43STao Ma 9797c908aecSJiapeng Chong if (!eb || !eb->h_next_leaf_blk) { 98038a04e43STao Ma /* 98138a04e43STao Ma * We are the last extent rec, so any high cpos should 98238a04e43STao Ma * be stored in this leaf refcount block. 98338a04e43STao Ma */ 98438a04e43STao Ma *cpos_end = UINT_MAX; 98538a04e43STao Ma return 0; 98638a04e43STao Ma } 98738a04e43STao Ma 98838a04e43STao Ma /* 98938a04e43STao Ma * If the extent block isn't the last one, we have to find 99038a04e43STao Ma * the subtree root between this extent block and the next 99138a04e43STao Ma * leaf extent block and get the corresponding e_cpos from 99238a04e43STao Ma * the subroot. Otherwise we may corrupt the b-tree. 99338a04e43STao Ma */ 99438a04e43STao Ma ocfs2_init_refcount_extent_tree(&et, ci, ref_root_bh); 99538a04e43STao Ma 99638a04e43STao Ma left_path = ocfs2_new_path_from_et(&et); 99738a04e43STao Ma if (!left_path) { 99838a04e43STao Ma ret = -ENOMEM; 99938a04e43STao Ma mlog_errno(ret); 100038a04e43STao Ma goto out; 100138a04e43STao Ma } 100238a04e43STao Ma 100338a04e43STao Ma cpos = le32_to_cpu(eb->h_list.l_recs[index].e_cpos); 100438a04e43STao Ma ret = ocfs2_find_path(ci, left_path, cpos); 100538a04e43STao Ma if (ret) { 100638a04e43STao Ma mlog_errno(ret); 100738a04e43STao Ma goto out; 100838a04e43STao Ma } 100938a04e43STao Ma 101038a04e43STao Ma right_path = ocfs2_new_path_from_path(left_path); 101138a04e43STao Ma if (!right_path) { 101238a04e43STao Ma ret = -ENOMEM; 101338a04e43STao Ma mlog_errno(ret); 101438a04e43STao Ma goto out; 101538a04e43STao Ma } 101638a04e43STao Ma 101738a04e43STao Ma ret = ocfs2_find_cpos_for_right_leaf(sb, left_path, &cpos); 101838a04e43STao Ma if (ret) { 101938a04e43STao Ma mlog_errno(ret); 102038a04e43STao Ma goto out; 102138a04e43STao Ma } 102238a04e43STao Ma 102338a04e43STao Ma ret = ocfs2_find_path(ci, right_path, cpos); 102438a04e43STao Ma if (ret) { 102538a04e43STao Ma mlog_errno(ret); 102638a04e43STao Ma goto out; 102738a04e43STao Ma } 102838a04e43STao Ma 102938a04e43STao Ma subtree_root = ocfs2_find_subtree_root(&et, left_path, 103038a04e43STao Ma right_path); 103138a04e43STao Ma 103238a04e43STao Ma tmp_el = left_path->p_node[subtree_root].el; 103338a04e43STao Ma blkno = left_path->p_node[subtree_root+1].bh->b_blocknr; 10343a251f04SAl Viro for (i = 0; i < le16_to_cpu(tmp_el->l_next_free_rec); i++) { 103538a04e43STao Ma if (le64_to_cpu(tmp_el->l_recs[i].e_blkno) == blkno) { 103638a04e43STao Ma *cpos_end = le32_to_cpu(tmp_el->l_recs[i+1].e_cpos); 103738a04e43STao Ma break; 103838a04e43STao Ma } 103938a04e43STao Ma } 104038a04e43STao Ma 10413a251f04SAl Viro BUG_ON(i == le16_to_cpu(tmp_el->l_next_free_rec)); 104238a04e43STao Ma 104338a04e43STao Ma out: 104438a04e43STao Ma ocfs2_free_path(left_path); 104538a04e43STao Ma ocfs2_free_path(right_path); 104638a04e43STao Ma return ret; 104738a04e43STao Ma } 104838a04e43STao Ma 104938a04e43STao Ma /* 1050e73a819dSTao Ma * Given a cpos and len, try to find the refcount record which contains cpos. 1051e73a819dSTao Ma * 1. If cpos can be found in one refcount record, return the record. 1052e73a819dSTao Ma * 2. If cpos can't be found, return a fake record which start from cpos 1053e73a819dSTao Ma * and end at a small value between cpos+len and start of the next record. 1054e73a819dSTao Ma * This fake record has r_refcount = 0. 1055e73a819dSTao Ma */ 1056e73a819dSTao Ma static int ocfs2_get_refcount_rec(struct ocfs2_caching_info *ci, 1057e73a819dSTao Ma struct buffer_head *ref_root_bh, 1058e73a819dSTao Ma u64 cpos, unsigned int len, 1059e73a819dSTao Ma struct ocfs2_refcount_rec *ret_rec, 1060e73a819dSTao Ma int *index, 1061e73a819dSTao Ma struct buffer_head **ret_bh) 1062e73a819dSTao Ma { 1063e73a819dSTao Ma int ret = 0, i, found; 10643f649ab7SKees Cook u32 low_cpos, cpos_end; 1065e73a819dSTao Ma struct ocfs2_extent_list *el; 106638a04e43STao Ma struct ocfs2_extent_rec *rec = NULL; 106738a04e43STao Ma struct ocfs2_extent_block *eb = NULL; 1068e73a819dSTao Ma struct buffer_head *eb_bh = NULL, *ref_leaf_bh = NULL; 1069e73a819dSTao Ma struct super_block *sb = ocfs2_metadata_cache_get_super(ci); 1070e73a819dSTao Ma struct ocfs2_refcount_block *rb = 1071e73a819dSTao Ma (struct ocfs2_refcount_block *)ref_root_bh->b_data; 1072e73a819dSTao Ma 1073e73a819dSTao Ma if (!(le32_to_cpu(rb->rf_flags) & OCFS2_REFCOUNT_TREE_FL)) { 1074e73a819dSTao Ma ocfs2_find_refcount_rec_in_rl(ci, ref_root_bh, cpos, len, 1075e73a819dSTao Ma ret_rec, index); 1076e73a819dSTao Ma *ret_bh = ref_root_bh; 1077e73a819dSTao Ma get_bh(ref_root_bh); 1078e73a819dSTao Ma return 0; 1079e73a819dSTao Ma } 1080e73a819dSTao Ma 1081e73a819dSTao Ma el = &rb->rf_list; 1082e73a819dSTao Ma low_cpos = cpos & OCFS2_32BIT_POS_MASK; 1083e73a819dSTao Ma 1084e73a819dSTao Ma if (el->l_tree_depth) { 1085e73a819dSTao Ma ret = ocfs2_find_leaf(ci, el, low_cpos, &eb_bh); 1086e73a819dSTao Ma if (ret) { 1087e73a819dSTao Ma mlog_errno(ret); 1088e73a819dSTao Ma goto out; 1089e73a819dSTao Ma } 1090e73a819dSTao Ma 1091e73a819dSTao Ma eb = (struct ocfs2_extent_block *) eb_bh->b_data; 1092e73a819dSTao Ma el = &eb->h_list; 1093e73a819dSTao Ma 1094e73a819dSTao Ma if (el->l_tree_depth) { 109517a5b9abSGoldwyn Rodrigues ret = ocfs2_error(sb, 10967ecef14aSJoe Perches "refcount tree %llu has non zero tree depth in leaf btree tree block %llu\n", 1097e73a819dSTao Ma (unsigned long long)ocfs2_metadata_cache_owner(ci), 1098e73a819dSTao Ma (unsigned long long)eb_bh->b_blocknr); 1099e73a819dSTao Ma goto out; 1100e73a819dSTao Ma } 1101e73a819dSTao Ma } 1102e73a819dSTao Ma 1103e73a819dSTao Ma found = 0; 1104e73a819dSTao Ma for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) { 1105e73a819dSTao Ma rec = &el->l_recs[i]; 1106e73a819dSTao Ma 1107e73a819dSTao Ma if (le32_to_cpu(rec->e_cpos) <= low_cpos) { 1108e73a819dSTao Ma found = 1; 1109e73a819dSTao Ma break; 1110e73a819dSTao Ma } 1111e73a819dSTao Ma } 1112e73a819dSTao Ma 111338a04e43STao Ma if (found) { 111438a04e43STao Ma ret = ocfs2_get_refcount_cpos_end(ci, ref_root_bh, 111538a04e43STao Ma eb, el, i, &cpos_end); 111638a04e43STao Ma if (ret) { 111738a04e43STao Ma mlog_errno(ret); 111838a04e43STao Ma goto out; 111938a04e43STao Ma } 1120e73a819dSTao Ma 112138a04e43STao Ma if (cpos_end < low_cpos + len) 112238a04e43STao Ma len = cpos_end - low_cpos; 1123e73a819dSTao Ma } 1124e73a819dSTao Ma 1125e73a819dSTao Ma ret = ocfs2_read_refcount_block(ci, le64_to_cpu(rec->e_blkno), 1126e73a819dSTao Ma &ref_leaf_bh); 1127e73a819dSTao Ma if (ret) { 1128e73a819dSTao Ma mlog_errno(ret); 1129e73a819dSTao Ma goto out; 1130e73a819dSTao Ma } 1131e73a819dSTao Ma 1132e73a819dSTao Ma ocfs2_find_refcount_rec_in_rl(ci, ref_leaf_bh, cpos, len, 1133e73a819dSTao Ma ret_rec, index); 1134e73a819dSTao Ma *ret_bh = ref_leaf_bh; 1135e73a819dSTao Ma out: 1136e73a819dSTao Ma brelse(eb_bh); 1137e73a819dSTao Ma return ret; 1138e73a819dSTao Ma } 1139e73a819dSTao Ma 1140e73a819dSTao Ma enum ocfs2_ref_rec_contig { 1141e73a819dSTao Ma REF_CONTIG_NONE = 0, 1142e73a819dSTao Ma REF_CONTIG_LEFT, 1143e73a819dSTao Ma REF_CONTIG_RIGHT, 1144e73a819dSTao Ma REF_CONTIG_LEFTRIGHT, 1145e73a819dSTao Ma }; 1146e73a819dSTao Ma 1147e73a819dSTao Ma static enum ocfs2_ref_rec_contig 1148e73a819dSTao Ma ocfs2_refcount_rec_adjacent(struct ocfs2_refcount_block *rb, 1149e73a819dSTao Ma int index) 1150e73a819dSTao Ma { 1151e73a819dSTao Ma if ((rb->rf_records.rl_recs[index].r_refcount == 1152e73a819dSTao Ma rb->rf_records.rl_recs[index + 1].r_refcount) && 1153e73a819dSTao Ma (le64_to_cpu(rb->rf_records.rl_recs[index].r_cpos) + 1154e73a819dSTao Ma le32_to_cpu(rb->rf_records.rl_recs[index].r_clusters) == 1155e73a819dSTao Ma le64_to_cpu(rb->rf_records.rl_recs[index + 1].r_cpos))) 1156e73a819dSTao Ma return REF_CONTIG_RIGHT; 1157e73a819dSTao Ma 1158e73a819dSTao Ma return REF_CONTIG_NONE; 1159e73a819dSTao Ma } 1160e73a819dSTao Ma 1161e73a819dSTao Ma static enum ocfs2_ref_rec_contig 1162e73a819dSTao Ma ocfs2_refcount_rec_contig(struct ocfs2_refcount_block *rb, 1163e73a819dSTao Ma int index) 1164e73a819dSTao Ma { 1165e73a819dSTao Ma enum ocfs2_ref_rec_contig ret = REF_CONTIG_NONE; 1166e73a819dSTao Ma 1167e73a819dSTao Ma if (index < le16_to_cpu(rb->rf_records.rl_used) - 1) 1168e73a819dSTao Ma ret = ocfs2_refcount_rec_adjacent(rb, index); 1169e73a819dSTao Ma 1170e73a819dSTao Ma if (index > 0) { 1171e73a819dSTao Ma enum ocfs2_ref_rec_contig tmp; 1172e73a819dSTao Ma 1173e73a819dSTao Ma tmp = ocfs2_refcount_rec_adjacent(rb, index - 1); 1174e73a819dSTao Ma 1175e73a819dSTao Ma if (tmp == REF_CONTIG_RIGHT) { 1176e73a819dSTao Ma if (ret == REF_CONTIG_RIGHT) 1177e73a819dSTao Ma ret = REF_CONTIG_LEFTRIGHT; 1178e73a819dSTao Ma else 1179e73a819dSTao Ma ret = REF_CONTIG_LEFT; 1180e73a819dSTao Ma } 1181e73a819dSTao Ma } 1182e73a819dSTao Ma 1183e73a819dSTao Ma return ret; 1184e73a819dSTao Ma } 1185e73a819dSTao Ma 1186e73a819dSTao Ma static void ocfs2_rotate_refcount_rec_left(struct ocfs2_refcount_block *rb, 1187e73a819dSTao Ma int index) 1188e73a819dSTao Ma { 1189e73a819dSTao Ma BUG_ON(rb->rf_records.rl_recs[index].r_refcount != 1190e73a819dSTao Ma rb->rf_records.rl_recs[index+1].r_refcount); 1191e73a819dSTao Ma 1192e73a819dSTao Ma le32_add_cpu(&rb->rf_records.rl_recs[index].r_clusters, 1193e73a819dSTao Ma le32_to_cpu(rb->rf_records.rl_recs[index+1].r_clusters)); 1194e73a819dSTao Ma 1195e73a819dSTao Ma if (index < le16_to_cpu(rb->rf_records.rl_used) - 2) 1196e73a819dSTao Ma memmove(&rb->rf_records.rl_recs[index + 1], 1197e73a819dSTao Ma &rb->rf_records.rl_recs[index + 2], 1198e73a819dSTao Ma sizeof(struct ocfs2_refcount_rec) * 1199e73a819dSTao Ma (le16_to_cpu(rb->rf_records.rl_used) - index - 2)); 1200e73a819dSTao Ma 1201e73a819dSTao Ma memset(&rb->rf_records.rl_recs[le16_to_cpu(rb->rf_records.rl_used) - 1], 1202e73a819dSTao Ma 0, sizeof(struct ocfs2_refcount_rec)); 1203e73a819dSTao Ma le16_add_cpu(&rb->rf_records.rl_used, -1); 1204e73a819dSTao Ma } 1205e73a819dSTao Ma 1206e73a819dSTao Ma /* 1207e73a819dSTao Ma * Merge the refcount rec if we are contiguous with the adjacent recs. 1208e73a819dSTao Ma */ 1209e73a819dSTao Ma static void ocfs2_refcount_rec_merge(struct ocfs2_refcount_block *rb, 1210e73a819dSTao Ma int index) 1211e73a819dSTao Ma { 1212e73a819dSTao Ma enum ocfs2_ref_rec_contig contig = 1213e73a819dSTao Ma ocfs2_refcount_rec_contig(rb, index); 1214e73a819dSTao Ma 1215e73a819dSTao Ma if (contig == REF_CONTIG_NONE) 1216e73a819dSTao Ma return; 1217e73a819dSTao Ma 1218e73a819dSTao Ma if (contig == REF_CONTIG_LEFT || contig == REF_CONTIG_LEFTRIGHT) { 1219e73a819dSTao Ma BUG_ON(index == 0); 1220e73a819dSTao Ma index--; 1221e73a819dSTao Ma } 1222e73a819dSTao Ma 1223e73a819dSTao Ma ocfs2_rotate_refcount_rec_left(rb, index); 1224e73a819dSTao Ma 1225e73a819dSTao Ma if (contig == REF_CONTIG_LEFTRIGHT) 1226e73a819dSTao Ma ocfs2_rotate_refcount_rec_left(rb, index); 1227e73a819dSTao Ma } 1228e73a819dSTao Ma 12291823cb0bSTao Ma /* 12301823cb0bSTao Ma * Change the refcount indexed by "index" in ref_bh. 12311823cb0bSTao Ma * If refcount reaches 0, remove it. 12321823cb0bSTao Ma */ 1233e73a819dSTao Ma static int ocfs2_change_refcount_rec(handle_t *handle, 1234e73a819dSTao Ma struct ocfs2_caching_info *ci, 1235e73a819dSTao Ma struct buffer_head *ref_leaf_bh, 12367540c1a7STao Ma int index, int merge, int change) 1237e73a819dSTao Ma { 1238e73a819dSTao Ma int ret; 1239e73a819dSTao Ma struct ocfs2_refcount_block *rb = 1240e73a819dSTao Ma (struct ocfs2_refcount_block *)ref_leaf_bh->b_data; 12411823cb0bSTao Ma struct ocfs2_refcount_list *rl = &rb->rf_records; 12421823cb0bSTao Ma struct ocfs2_refcount_rec *rec = &rl->rl_recs[index]; 1243e73a819dSTao Ma 1244e73a819dSTao Ma ret = ocfs2_journal_access_rb(handle, ci, ref_leaf_bh, 1245e73a819dSTao Ma OCFS2_JOURNAL_ACCESS_WRITE); 1246e73a819dSTao Ma if (ret) { 1247e73a819dSTao Ma mlog_errno(ret); 1248e73a819dSTao Ma goto out; 1249e73a819dSTao Ma } 1250e73a819dSTao Ma 1251198aac28STao Ma trace_ocfs2_change_refcount_rec( 1252198aac28STao Ma (unsigned long long)ocfs2_metadata_cache_owner(ci), 1253198aac28STao Ma index, le32_to_cpu(rec->r_refcount), change); 1254e73a819dSTao Ma le32_add_cpu(&rec->r_refcount, change); 1255e73a819dSTao Ma 12561823cb0bSTao Ma if (!rec->r_refcount) { 12571823cb0bSTao Ma if (index != le16_to_cpu(rl->rl_used) - 1) { 12581823cb0bSTao Ma memmove(rec, rec + 1, 12591823cb0bSTao Ma (le16_to_cpu(rl->rl_used) - index - 1) * 12601823cb0bSTao Ma sizeof(struct ocfs2_refcount_rec)); 12611823cb0bSTao Ma memset(&rl->rl_recs[le16_to_cpu(rl->rl_used) - 1], 12621823cb0bSTao Ma 0, sizeof(struct ocfs2_refcount_rec)); 12631823cb0bSTao Ma } 12641823cb0bSTao Ma 12651823cb0bSTao Ma le16_add_cpu(&rl->rl_used, -1); 12667540c1a7STao Ma } else if (merge) 1267e73a819dSTao Ma ocfs2_refcount_rec_merge(rb, index); 1268e73a819dSTao Ma 1269ec20cec7SJoel Becker ocfs2_journal_dirty(handle, ref_leaf_bh); 1270e73a819dSTao Ma out: 1271e73a819dSTao Ma return ret; 1272e73a819dSTao Ma } 1273e73a819dSTao Ma 1274e73a819dSTao Ma static int ocfs2_expand_inline_ref_root(handle_t *handle, 1275e73a819dSTao Ma struct ocfs2_caching_info *ci, 1276e73a819dSTao Ma struct buffer_head *ref_root_bh, 1277e73a819dSTao Ma struct buffer_head **ref_leaf_bh, 1278e73a819dSTao Ma struct ocfs2_alloc_context *meta_ac) 1279e73a819dSTao Ma { 1280e73a819dSTao Ma int ret; 1281e73a819dSTao Ma u16 suballoc_bit_start; 1282e73a819dSTao Ma u32 num_got; 12832b6cb576SJoel Becker u64 suballoc_loc, blkno; 1284e73a819dSTao Ma struct super_block *sb = ocfs2_metadata_cache_get_super(ci); 1285e73a819dSTao Ma struct buffer_head *new_bh = NULL; 1286e73a819dSTao Ma struct ocfs2_refcount_block *new_rb; 1287e73a819dSTao Ma struct ocfs2_refcount_block *root_rb = 1288e73a819dSTao Ma (struct ocfs2_refcount_block *)ref_root_bh->b_data; 1289e73a819dSTao Ma 1290e73a819dSTao Ma ret = ocfs2_journal_access_rb(handle, ci, ref_root_bh, 1291e73a819dSTao Ma OCFS2_JOURNAL_ACCESS_WRITE); 1292e73a819dSTao Ma if (ret) { 1293e73a819dSTao Ma mlog_errno(ret); 1294e73a819dSTao Ma goto out; 1295e73a819dSTao Ma } 1296e73a819dSTao Ma 12972b6cb576SJoel Becker ret = ocfs2_claim_metadata(handle, meta_ac, 1, &suballoc_loc, 1298e73a819dSTao Ma &suballoc_bit_start, &num_got, 1299e73a819dSTao Ma &blkno); 1300e73a819dSTao Ma if (ret) { 1301e73a819dSTao Ma mlog_errno(ret); 1302e73a819dSTao Ma goto out; 1303e73a819dSTao Ma } 1304e73a819dSTao Ma 1305e73a819dSTao Ma new_bh = sb_getblk(sb, blkno); 1306e73a819dSTao Ma if (new_bh == NULL) { 13077391a294SRui Xiang ret = -ENOMEM; 1308e73a819dSTao Ma mlog_errno(ret); 1309e73a819dSTao Ma goto out; 1310e73a819dSTao Ma } 1311e73a819dSTao Ma ocfs2_set_new_buffer_uptodate(ci, new_bh); 1312e73a819dSTao Ma 1313e73a819dSTao Ma ret = ocfs2_journal_access_rb(handle, ci, new_bh, 1314e73a819dSTao Ma OCFS2_JOURNAL_ACCESS_CREATE); 1315e73a819dSTao Ma if (ret) { 1316e73a819dSTao Ma mlog_errno(ret); 1317e73a819dSTao Ma goto out; 1318e73a819dSTao Ma } 1319e73a819dSTao Ma 1320e73a819dSTao Ma /* 1321e73a819dSTao Ma * Initialize ocfs2_refcount_block. 1322e73a819dSTao Ma * It should contain the same information as the old root. 1323e73a819dSTao Ma * so just memcpy it and change the corresponding field. 1324e73a819dSTao Ma */ 1325e73a819dSTao Ma memcpy(new_bh->b_data, ref_root_bh->b_data, sb->s_blocksize); 1326e73a819dSTao Ma 1327e73a819dSTao Ma new_rb = (struct ocfs2_refcount_block *)new_bh->b_data; 1328b89c5428STiger Yang new_rb->rf_suballoc_slot = cpu_to_le16(meta_ac->ac_alloc_slot); 13292b6cb576SJoel Becker new_rb->rf_suballoc_loc = cpu_to_le64(suballoc_loc); 1330e73a819dSTao Ma new_rb->rf_suballoc_bit = cpu_to_le16(suballoc_bit_start); 1331e73a819dSTao Ma new_rb->rf_blkno = cpu_to_le64(blkno); 1332e73a819dSTao Ma new_rb->rf_cpos = cpu_to_le32(0); 1333e73a819dSTao Ma new_rb->rf_parent = cpu_to_le64(ref_root_bh->b_blocknr); 1334e73a819dSTao Ma new_rb->rf_flags = cpu_to_le32(OCFS2_REFCOUNT_LEAF_FL); 1335e73a819dSTao Ma ocfs2_journal_dirty(handle, new_bh); 1336e73a819dSTao Ma 1337e73a819dSTao Ma /* Now change the root. */ 1338e73a819dSTao Ma memset(&root_rb->rf_list, 0, sb->s_blocksize - 1339e73a819dSTao Ma offsetof(struct ocfs2_refcount_block, rf_list)); 1340e73a819dSTao Ma root_rb->rf_list.l_count = cpu_to_le16(ocfs2_extent_recs_per_rb(sb)); 1341e73a819dSTao Ma root_rb->rf_clusters = cpu_to_le32(1); 1342e73a819dSTao Ma root_rb->rf_list.l_next_free_rec = cpu_to_le16(1); 1343e73a819dSTao Ma root_rb->rf_list.l_recs[0].e_blkno = cpu_to_le64(blkno); 1344e73a819dSTao Ma root_rb->rf_list.l_recs[0].e_leaf_clusters = cpu_to_le16(1); 1345e73a819dSTao Ma root_rb->rf_flags = cpu_to_le32(OCFS2_REFCOUNT_TREE_FL); 1346e73a819dSTao Ma 1347e73a819dSTao Ma ocfs2_journal_dirty(handle, ref_root_bh); 1348e73a819dSTao Ma 1349198aac28STao Ma trace_ocfs2_expand_inline_ref_root((unsigned long long)blkno, 1350e73a819dSTao Ma le16_to_cpu(new_rb->rf_records.rl_used)); 1351e73a819dSTao Ma 1352e73a819dSTao Ma *ref_leaf_bh = new_bh; 1353e73a819dSTao Ma new_bh = NULL; 1354e73a819dSTao Ma out: 1355e73a819dSTao Ma brelse(new_bh); 1356e73a819dSTao Ma return ret; 1357e73a819dSTao Ma } 1358e73a819dSTao Ma 1359e73a819dSTao Ma static int ocfs2_refcount_rec_no_intersect(struct ocfs2_refcount_rec *prev, 1360e73a819dSTao Ma struct ocfs2_refcount_rec *next) 1361e73a819dSTao Ma { 1362e73a819dSTao Ma if (ocfs2_get_ref_rec_low_cpos(prev) + le32_to_cpu(prev->r_clusters) <= 1363e73a819dSTao Ma ocfs2_get_ref_rec_low_cpos(next)) 1364e73a819dSTao Ma return 1; 1365e73a819dSTao Ma 1366e73a819dSTao Ma return 0; 1367e73a819dSTao Ma } 1368e73a819dSTao Ma 1369e73a819dSTao Ma static int cmp_refcount_rec_by_low_cpos(const void *a, const void *b) 1370e73a819dSTao Ma { 1371e73a819dSTao Ma const struct ocfs2_refcount_rec *l = a, *r = b; 1372e73a819dSTao Ma u32 l_cpos = ocfs2_get_ref_rec_low_cpos(l); 1373e73a819dSTao Ma u32 r_cpos = ocfs2_get_ref_rec_low_cpos(r); 1374e73a819dSTao Ma 1375e73a819dSTao Ma if (l_cpos > r_cpos) 1376e73a819dSTao Ma return 1; 1377e73a819dSTao Ma if (l_cpos < r_cpos) 1378e73a819dSTao Ma return -1; 1379e73a819dSTao Ma return 0; 1380e73a819dSTao Ma } 1381e73a819dSTao Ma 1382e73a819dSTao Ma static int cmp_refcount_rec_by_cpos(const void *a, const void *b) 1383e73a819dSTao Ma { 1384e73a819dSTao Ma const struct ocfs2_refcount_rec *l = a, *r = b; 1385e73a819dSTao Ma u64 l_cpos = le64_to_cpu(l->r_cpos); 1386e73a819dSTao Ma u64 r_cpos = le64_to_cpu(r->r_cpos); 1387e73a819dSTao Ma 1388e73a819dSTao Ma if (l_cpos > r_cpos) 1389e73a819dSTao Ma return 1; 1390e73a819dSTao Ma if (l_cpos < r_cpos) 1391e73a819dSTao Ma return -1; 1392e73a819dSTao Ma return 0; 1393e73a819dSTao Ma } 1394e73a819dSTao Ma 1395e73a819dSTao Ma static void swap_refcount_rec(void *a, void *b, int size) 1396e73a819dSTao Ma { 1397a612543fSFabian Frederick struct ocfs2_refcount_rec *l = a, *r = b; 1398e73a819dSTao Ma 1399a612543fSFabian Frederick swap(*l, *r); 1400e73a819dSTao Ma } 1401e73a819dSTao Ma 1402e73a819dSTao Ma /* 1403e73a819dSTao Ma * The refcount cpos are ordered by their 64bit cpos, 1404e73a819dSTao Ma * But we will use the low 32 bit to be the e_cpos in the b-tree. 1405e73a819dSTao Ma * So we need to make sure that this pos isn't intersected with others. 1406e73a819dSTao Ma * 1407e73a819dSTao Ma * Note: The refcount block is already sorted by their low 32 bit cpos, 1408e73a819dSTao Ma * So just try the middle pos first, and we will exit when we find 1409e73a819dSTao Ma * the good position. 1410e73a819dSTao Ma */ 1411e73a819dSTao Ma static int ocfs2_find_refcount_split_pos(struct ocfs2_refcount_list *rl, 1412e73a819dSTao Ma u32 *split_pos, int *split_index) 1413e73a819dSTao Ma { 1414e73a819dSTao Ma int num_used = le16_to_cpu(rl->rl_used); 1415e73a819dSTao Ma int delta, middle = num_used / 2; 1416e73a819dSTao Ma 1417e73a819dSTao Ma for (delta = 0; delta < middle; delta++) { 1418e73a819dSTao Ma /* Let's check delta earlier than middle */ 1419e73a819dSTao Ma if (ocfs2_refcount_rec_no_intersect( 1420e73a819dSTao Ma &rl->rl_recs[middle - delta - 1], 1421e73a819dSTao Ma &rl->rl_recs[middle - delta])) { 1422e73a819dSTao Ma *split_index = middle - delta; 1423e73a819dSTao Ma break; 1424e73a819dSTao Ma } 1425e73a819dSTao Ma 1426e73a819dSTao Ma /* For even counts, don't walk off the end */ 1427e73a819dSTao Ma if ((middle + delta + 1) == num_used) 1428e73a819dSTao Ma continue; 1429e73a819dSTao Ma 1430e73a819dSTao Ma /* Now try delta past middle */ 1431e73a819dSTao Ma if (ocfs2_refcount_rec_no_intersect( 1432e73a819dSTao Ma &rl->rl_recs[middle + delta], 1433e73a819dSTao Ma &rl->rl_recs[middle + delta + 1])) { 1434e73a819dSTao Ma *split_index = middle + delta + 1; 1435e73a819dSTao Ma break; 1436e73a819dSTao Ma } 1437e73a819dSTao Ma } 1438e73a819dSTao Ma 1439e73a819dSTao Ma if (delta >= middle) 1440e73a819dSTao Ma return -ENOSPC; 1441e73a819dSTao Ma 1442e73a819dSTao Ma *split_pos = ocfs2_get_ref_rec_low_cpos(&rl->rl_recs[*split_index]); 1443e73a819dSTao Ma return 0; 1444e73a819dSTao Ma } 1445e73a819dSTao Ma 1446e73a819dSTao Ma static int ocfs2_divide_leaf_refcount_block(struct buffer_head *ref_leaf_bh, 1447e73a819dSTao Ma struct buffer_head *new_bh, 1448e73a819dSTao Ma u32 *split_cpos) 1449e73a819dSTao Ma { 1450e73a819dSTao Ma int split_index = 0, num_moved, ret; 1451e73a819dSTao Ma u32 cpos = 0; 1452e73a819dSTao Ma struct ocfs2_refcount_block *rb = 1453e73a819dSTao Ma (struct ocfs2_refcount_block *)ref_leaf_bh->b_data; 1454e73a819dSTao Ma struct ocfs2_refcount_list *rl = &rb->rf_records; 1455e73a819dSTao Ma struct ocfs2_refcount_block *new_rb = 1456e73a819dSTao Ma (struct ocfs2_refcount_block *)new_bh->b_data; 1457e73a819dSTao Ma struct ocfs2_refcount_list *new_rl = &new_rb->rf_records; 1458e73a819dSTao Ma 1459198aac28STao Ma trace_ocfs2_divide_leaf_refcount_block( 1460e73a819dSTao Ma (unsigned long long)ref_leaf_bh->b_blocknr, 146128748b32SAl Viro le16_to_cpu(rl->rl_count), le16_to_cpu(rl->rl_used)); 1462e73a819dSTao Ma 1463e73a819dSTao Ma /* 1464e73a819dSTao Ma * XXX: Improvement later. 1465e73a819dSTao Ma * If we know all the high 32 bit cpos is the same, no need to sort. 1466e73a819dSTao Ma * 1467e73a819dSTao Ma * In order to make the whole process safe, we do: 1468e73a819dSTao Ma * 1. sort the entries by their low 32 bit cpos first so that we can 1469e73a819dSTao Ma * find the split cpos easily. 1470e73a819dSTao Ma * 2. call ocfs2_insert_extent to insert the new refcount block. 1471e73a819dSTao Ma * 3. move the refcount rec to the new block. 1472e73a819dSTao Ma * 4. sort the entries by their 64 bit cpos. 1473e73a819dSTao Ma * 5. dirty the new_rb and rb. 1474e73a819dSTao Ma */ 1475e73a819dSTao Ma sort(&rl->rl_recs, le16_to_cpu(rl->rl_used), 1476e73a819dSTao Ma sizeof(struct ocfs2_refcount_rec), 1477e73a819dSTao Ma cmp_refcount_rec_by_low_cpos, swap_refcount_rec); 1478e73a819dSTao Ma 1479e73a819dSTao Ma ret = ocfs2_find_refcount_split_pos(rl, &cpos, &split_index); 1480e73a819dSTao Ma if (ret) { 1481e73a819dSTao Ma mlog_errno(ret); 1482e73a819dSTao Ma return ret; 1483e73a819dSTao Ma } 1484e73a819dSTao Ma 1485e73a819dSTao Ma new_rb->rf_cpos = cpu_to_le32(cpos); 1486e73a819dSTao Ma 1487e73a819dSTao Ma /* move refcount records starting from split_index to the new block. */ 1488e73a819dSTao Ma num_moved = le16_to_cpu(rl->rl_used) - split_index; 1489e73a819dSTao Ma memcpy(new_rl->rl_recs, &rl->rl_recs[split_index], 1490e73a819dSTao Ma num_moved * sizeof(struct ocfs2_refcount_rec)); 1491e73a819dSTao Ma 1492e73a819dSTao Ma /*ok, remove the entries we just moved over to the other block. */ 1493e73a819dSTao Ma memset(&rl->rl_recs[split_index], 0, 1494e73a819dSTao Ma num_moved * sizeof(struct ocfs2_refcount_rec)); 1495e73a819dSTao Ma 1496e73a819dSTao Ma /* change old and new rl_used accordingly. */ 1497e73a819dSTao Ma le16_add_cpu(&rl->rl_used, -num_moved); 149812d4cec9STao Ma new_rl->rl_used = cpu_to_le16(num_moved); 1499e73a819dSTao Ma 1500e73a819dSTao Ma sort(&rl->rl_recs, le16_to_cpu(rl->rl_used), 1501e73a819dSTao Ma sizeof(struct ocfs2_refcount_rec), 1502e73a819dSTao Ma cmp_refcount_rec_by_cpos, swap_refcount_rec); 1503e73a819dSTao Ma 1504e73a819dSTao Ma sort(&new_rl->rl_recs, le16_to_cpu(new_rl->rl_used), 1505e73a819dSTao Ma sizeof(struct ocfs2_refcount_rec), 1506e73a819dSTao Ma cmp_refcount_rec_by_cpos, swap_refcount_rec); 1507e73a819dSTao Ma 1508e73a819dSTao Ma *split_cpos = cpos; 1509e73a819dSTao Ma return 0; 1510e73a819dSTao Ma } 1511e73a819dSTao Ma 1512e73a819dSTao Ma static int ocfs2_new_leaf_refcount_block(handle_t *handle, 1513e73a819dSTao Ma struct ocfs2_caching_info *ci, 1514e73a819dSTao Ma struct buffer_head *ref_root_bh, 1515e73a819dSTao Ma struct buffer_head *ref_leaf_bh, 1516e73a819dSTao Ma struct ocfs2_alloc_context *meta_ac) 1517e73a819dSTao Ma { 1518e73a819dSTao Ma int ret; 1519e73a819dSTao Ma u16 suballoc_bit_start; 1520e73a819dSTao Ma u32 num_got, new_cpos; 15212b6cb576SJoel Becker u64 suballoc_loc, blkno; 1522e73a819dSTao Ma struct super_block *sb = ocfs2_metadata_cache_get_super(ci); 1523e73a819dSTao Ma struct ocfs2_refcount_block *root_rb = 1524e73a819dSTao Ma (struct ocfs2_refcount_block *)ref_root_bh->b_data; 1525e73a819dSTao Ma struct buffer_head *new_bh = NULL; 1526e73a819dSTao Ma struct ocfs2_refcount_block *new_rb; 1527e73a819dSTao Ma struct ocfs2_extent_tree ref_et; 1528e73a819dSTao Ma 1529e73a819dSTao Ma BUG_ON(!(le32_to_cpu(root_rb->rf_flags) & OCFS2_REFCOUNT_TREE_FL)); 1530e73a819dSTao Ma 1531e73a819dSTao Ma ret = ocfs2_journal_access_rb(handle, ci, ref_root_bh, 1532e73a819dSTao Ma OCFS2_JOURNAL_ACCESS_WRITE); 1533e73a819dSTao Ma if (ret) { 1534e73a819dSTao Ma mlog_errno(ret); 1535e73a819dSTao Ma goto out; 1536e73a819dSTao Ma } 1537e73a819dSTao Ma 1538e73a819dSTao Ma ret = ocfs2_journal_access_rb(handle, ci, ref_leaf_bh, 1539e73a819dSTao Ma OCFS2_JOURNAL_ACCESS_WRITE); 1540e73a819dSTao Ma if (ret) { 1541e73a819dSTao Ma mlog_errno(ret); 1542e73a819dSTao Ma goto out; 1543e73a819dSTao Ma } 1544e73a819dSTao Ma 15452b6cb576SJoel Becker ret = ocfs2_claim_metadata(handle, meta_ac, 1, &suballoc_loc, 1546e73a819dSTao Ma &suballoc_bit_start, &num_got, 1547e73a819dSTao Ma &blkno); 1548e73a819dSTao Ma if (ret) { 1549e73a819dSTao Ma mlog_errno(ret); 1550e73a819dSTao Ma goto out; 1551e73a819dSTao Ma } 1552e73a819dSTao Ma 1553e73a819dSTao Ma new_bh = sb_getblk(sb, blkno); 1554e73a819dSTao Ma if (new_bh == NULL) { 15557391a294SRui Xiang ret = -ENOMEM; 1556e73a819dSTao Ma mlog_errno(ret); 1557e73a819dSTao Ma goto out; 1558e73a819dSTao Ma } 1559e73a819dSTao Ma ocfs2_set_new_buffer_uptodate(ci, new_bh); 1560e73a819dSTao Ma 1561e73a819dSTao Ma ret = ocfs2_journal_access_rb(handle, ci, new_bh, 1562e73a819dSTao Ma OCFS2_JOURNAL_ACCESS_CREATE); 1563e73a819dSTao Ma if (ret) { 1564e73a819dSTao Ma mlog_errno(ret); 1565e73a819dSTao Ma goto out; 1566e73a819dSTao Ma } 1567e73a819dSTao Ma 1568e73a819dSTao Ma /* Initialize ocfs2_refcount_block. */ 1569e73a819dSTao Ma new_rb = (struct ocfs2_refcount_block *)new_bh->b_data; 1570e73a819dSTao Ma memset(new_rb, 0, sb->s_blocksize); 1571e73a819dSTao Ma strcpy((void *)new_rb, OCFS2_REFCOUNT_BLOCK_SIGNATURE); 1572b89c5428STiger Yang new_rb->rf_suballoc_slot = cpu_to_le16(meta_ac->ac_alloc_slot); 15732b6cb576SJoel Becker new_rb->rf_suballoc_loc = cpu_to_le64(suballoc_loc); 1574e73a819dSTao Ma new_rb->rf_suballoc_bit = cpu_to_le16(suballoc_bit_start); 1575e73a819dSTao Ma new_rb->rf_fs_generation = cpu_to_le32(OCFS2_SB(sb)->fs_generation); 1576e73a819dSTao Ma new_rb->rf_blkno = cpu_to_le64(blkno); 1577e73a819dSTao Ma new_rb->rf_parent = cpu_to_le64(ref_root_bh->b_blocknr); 1578e73a819dSTao Ma new_rb->rf_flags = cpu_to_le32(OCFS2_REFCOUNT_LEAF_FL); 1579e73a819dSTao Ma new_rb->rf_records.rl_count = 1580e73a819dSTao Ma cpu_to_le16(ocfs2_refcount_recs_per_rb(sb)); 1581e73a819dSTao Ma new_rb->rf_generation = root_rb->rf_generation; 1582e73a819dSTao Ma 1583e73a819dSTao Ma ret = ocfs2_divide_leaf_refcount_block(ref_leaf_bh, new_bh, &new_cpos); 1584e73a819dSTao Ma if (ret) { 1585e73a819dSTao Ma mlog_errno(ret); 1586e73a819dSTao Ma goto out; 1587e73a819dSTao Ma } 1588e73a819dSTao Ma 1589e73a819dSTao Ma ocfs2_journal_dirty(handle, ref_leaf_bh); 1590e73a819dSTao Ma ocfs2_journal_dirty(handle, new_bh); 1591e73a819dSTao Ma 1592e73a819dSTao Ma ocfs2_init_refcount_extent_tree(&ref_et, ci, ref_root_bh); 1593e73a819dSTao Ma 1594198aac28STao Ma trace_ocfs2_new_leaf_refcount_block( 1595e73a819dSTao Ma (unsigned long long)new_bh->b_blocknr, new_cpos); 1596e73a819dSTao Ma 1597e73a819dSTao Ma /* Insert the new leaf block with the specific offset cpos. */ 1598e73a819dSTao Ma ret = ocfs2_insert_extent(handle, &ref_et, new_cpos, new_bh->b_blocknr, 1599e73a819dSTao Ma 1, 0, meta_ac); 1600e73a819dSTao Ma if (ret) 1601e73a819dSTao Ma mlog_errno(ret); 1602e73a819dSTao Ma 1603e73a819dSTao Ma out: 1604e73a819dSTao Ma brelse(new_bh); 1605e73a819dSTao Ma return ret; 1606e73a819dSTao Ma } 1607e73a819dSTao Ma 1608e73a819dSTao Ma static int ocfs2_expand_refcount_tree(handle_t *handle, 1609e73a819dSTao Ma struct ocfs2_caching_info *ci, 1610e73a819dSTao Ma struct buffer_head *ref_root_bh, 1611e73a819dSTao Ma struct buffer_head *ref_leaf_bh, 1612e73a819dSTao Ma struct ocfs2_alloc_context *meta_ac) 1613e73a819dSTao Ma { 1614e73a819dSTao Ma int ret; 1615e73a819dSTao Ma struct buffer_head *expand_bh = NULL; 1616e73a819dSTao Ma 1617e73a819dSTao Ma if (ref_root_bh == ref_leaf_bh) { 1618e73a819dSTao Ma /* 1619e73a819dSTao Ma * the old root bh hasn't been expanded to a b-tree, 1620e73a819dSTao Ma * so expand it first. 1621e73a819dSTao Ma */ 1622e73a819dSTao Ma ret = ocfs2_expand_inline_ref_root(handle, ci, ref_root_bh, 1623e73a819dSTao Ma &expand_bh, meta_ac); 1624e73a819dSTao Ma if (ret) { 1625e73a819dSTao Ma mlog_errno(ret); 1626e73a819dSTao Ma goto out; 1627e73a819dSTao Ma } 1628e73a819dSTao Ma } else { 1629e73a819dSTao Ma expand_bh = ref_leaf_bh; 1630e73a819dSTao Ma get_bh(expand_bh); 1631e73a819dSTao Ma } 1632e73a819dSTao Ma 1633e73a819dSTao Ma 1634e73a819dSTao Ma /* Now add a new refcount block into the tree.*/ 1635e73a819dSTao Ma ret = ocfs2_new_leaf_refcount_block(handle, ci, ref_root_bh, 1636e73a819dSTao Ma expand_bh, meta_ac); 1637e73a819dSTao Ma if (ret) 1638e73a819dSTao Ma mlog_errno(ret); 1639e73a819dSTao Ma out: 1640e73a819dSTao Ma brelse(expand_bh); 1641e73a819dSTao Ma return ret; 1642e73a819dSTao Ma } 1643e73a819dSTao Ma 1644e73a819dSTao Ma /* 1645e73a819dSTao Ma * Adjust the extent rec in b-tree representing ref_leaf_bh. 1646e73a819dSTao Ma * 1647e73a819dSTao Ma * Only called when we have inserted a new refcount rec at index 0 1648e73a819dSTao Ma * which means ocfs2_extent_rec.e_cpos may need some change. 1649e73a819dSTao Ma */ 1650e73a819dSTao Ma static int ocfs2_adjust_refcount_rec(handle_t *handle, 1651e73a819dSTao Ma struct ocfs2_caching_info *ci, 1652e73a819dSTao Ma struct buffer_head *ref_root_bh, 1653e73a819dSTao Ma struct buffer_head *ref_leaf_bh, 1654e73a819dSTao Ma struct ocfs2_refcount_rec *rec) 1655e73a819dSTao Ma { 1656e73a819dSTao Ma int ret = 0, i; 1657e73a819dSTao Ma u32 new_cpos, old_cpos; 1658e73a819dSTao Ma struct ocfs2_path *path = NULL; 1659e73a819dSTao Ma struct ocfs2_extent_tree et; 1660e73a819dSTao Ma struct ocfs2_refcount_block *rb = 1661e73a819dSTao Ma (struct ocfs2_refcount_block *)ref_root_bh->b_data; 1662e73a819dSTao Ma struct ocfs2_extent_list *el; 1663e73a819dSTao Ma 1664e73a819dSTao Ma if (!(le32_to_cpu(rb->rf_flags) & OCFS2_REFCOUNT_TREE_FL)) 1665e73a819dSTao Ma goto out; 1666e73a819dSTao Ma 1667e73a819dSTao Ma rb = (struct ocfs2_refcount_block *)ref_leaf_bh->b_data; 1668e73a819dSTao Ma old_cpos = le32_to_cpu(rb->rf_cpos); 1669e73a819dSTao Ma new_cpos = le64_to_cpu(rec->r_cpos) & OCFS2_32BIT_POS_MASK; 1670e73a819dSTao Ma if (old_cpos <= new_cpos) 1671e73a819dSTao Ma goto out; 1672e73a819dSTao Ma 1673e73a819dSTao Ma ocfs2_init_refcount_extent_tree(&et, ci, ref_root_bh); 1674e73a819dSTao Ma 1675e73a819dSTao Ma path = ocfs2_new_path_from_et(&et); 1676e73a819dSTao Ma if (!path) { 1677e73a819dSTao Ma ret = -ENOMEM; 1678e73a819dSTao Ma mlog_errno(ret); 1679e73a819dSTao Ma goto out; 1680e73a819dSTao Ma } 1681e73a819dSTao Ma 1682e73a819dSTao Ma ret = ocfs2_find_path(ci, path, old_cpos); 1683e73a819dSTao Ma if (ret) { 1684e73a819dSTao Ma mlog_errno(ret); 1685e73a819dSTao Ma goto out; 1686e73a819dSTao Ma } 1687e73a819dSTao Ma 1688e73a819dSTao Ma /* 1689e73a819dSTao Ma * 2 more credits, one for the leaf refcount block, one for 1690e73a819dSTao Ma * the extent block contains the extent rec. 1691e73a819dSTao Ma */ 1692c901fb00STao Ma ret = ocfs2_extend_trans(handle, 2); 1693e73a819dSTao Ma if (ret < 0) { 1694e73a819dSTao Ma mlog_errno(ret); 1695e73a819dSTao Ma goto out; 1696e73a819dSTao Ma } 1697e73a819dSTao Ma 1698e73a819dSTao Ma ret = ocfs2_journal_access_rb(handle, ci, ref_leaf_bh, 1699e73a819dSTao Ma OCFS2_JOURNAL_ACCESS_WRITE); 1700e73a819dSTao Ma if (ret < 0) { 1701e73a819dSTao Ma mlog_errno(ret); 1702e73a819dSTao Ma goto out; 1703e73a819dSTao Ma } 1704e73a819dSTao Ma 1705e73a819dSTao Ma ret = ocfs2_journal_access_eb(handle, ci, path_leaf_bh(path), 1706e73a819dSTao Ma OCFS2_JOURNAL_ACCESS_WRITE); 1707e73a819dSTao Ma if (ret < 0) { 1708e73a819dSTao Ma mlog_errno(ret); 1709e73a819dSTao Ma goto out; 1710e73a819dSTao Ma } 1711e73a819dSTao Ma 1712e73a819dSTao Ma /* change the leaf extent block first. */ 1713e73a819dSTao Ma el = path_leaf_el(path); 1714e73a819dSTao Ma 1715e73a819dSTao Ma for (i = 0; i < le16_to_cpu(el->l_next_free_rec); i++) 1716e73a819dSTao Ma if (le32_to_cpu(el->l_recs[i].e_cpos) == old_cpos) 1717e73a819dSTao Ma break; 1718e73a819dSTao Ma 1719e73a819dSTao Ma BUG_ON(i == le16_to_cpu(el->l_next_free_rec)); 1720e73a819dSTao Ma 1721e73a819dSTao Ma el->l_recs[i].e_cpos = cpu_to_le32(new_cpos); 1722e73a819dSTao Ma 1723e73a819dSTao Ma /* change the r_cpos in the leaf block. */ 1724e73a819dSTao Ma rb->rf_cpos = cpu_to_le32(new_cpos); 1725e73a819dSTao Ma 1726e73a819dSTao Ma ocfs2_journal_dirty(handle, path_leaf_bh(path)); 1727e73a819dSTao Ma ocfs2_journal_dirty(handle, ref_leaf_bh); 1728e73a819dSTao Ma 1729e73a819dSTao Ma out: 1730e73a819dSTao Ma ocfs2_free_path(path); 1731e73a819dSTao Ma return ret; 1732e73a819dSTao Ma } 1733e73a819dSTao Ma 1734e73a819dSTao Ma static int ocfs2_insert_refcount_rec(handle_t *handle, 1735e73a819dSTao Ma struct ocfs2_caching_info *ci, 1736e73a819dSTao Ma struct buffer_head *ref_root_bh, 1737e73a819dSTao Ma struct buffer_head *ref_leaf_bh, 1738e73a819dSTao Ma struct ocfs2_refcount_rec *rec, 17397540c1a7STao Ma int index, int merge, 1740e73a819dSTao Ma struct ocfs2_alloc_context *meta_ac) 1741e73a819dSTao Ma { 1742e73a819dSTao Ma int ret; 1743e73a819dSTao Ma struct ocfs2_refcount_block *rb = 1744e73a819dSTao Ma (struct ocfs2_refcount_block *)ref_leaf_bh->b_data; 1745e73a819dSTao Ma struct ocfs2_refcount_list *rf_list = &rb->rf_records; 1746e73a819dSTao Ma struct buffer_head *new_bh = NULL; 1747e73a819dSTao Ma 1748e73a819dSTao Ma BUG_ON(le32_to_cpu(rb->rf_flags) & OCFS2_REFCOUNT_TREE_FL); 1749e73a819dSTao Ma 1750e73a819dSTao Ma if (rf_list->rl_used == rf_list->rl_count) { 1751e73a819dSTao Ma u64 cpos = le64_to_cpu(rec->r_cpos); 1752e73a819dSTao Ma u32 len = le32_to_cpu(rec->r_clusters); 1753e73a819dSTao Ma 1754e73a819dSTao Ma ret = ocfs2_expand_refcount_tree(handle, ci, ref_root_bh, 1755e73a819dSTao Ma ref_leaf_bh, meta_ac); 1756e73a819dSTao Ma if (ret) { 1757e73a819dSTao Ma mlog_errno(ret); 1758e73a819dSTao Ma goto out; 1759e73a819dSTao Ma } 1760e73a819dSTao Ma 1761e73a819dSTao Ma ret = ocfs2_get_refcount_rec(ci, ref_root_bh, 1762e73a819dSTao Ma cpos, len, NULL, &index, 1763e73a819dSTao Ma &new_bh); 1764e73a819dSTao Ma if (ret) { 1765e73a819dSTao Ma mlog_errno(ret); 1766e73a819dSTao Ma goto out; 1767e73a819dSTao Ma } 1768e73a819dSTao Ma 1769e73a819dSTao Ma ref_leaf_bh = new_bh; 1770e73a819dSTao Ma rb = (struct ocfs2_refcount_block *)ref_leaf_bh->b_data; 1771e73a819dSTao Ma rf_list = &rb->rf_records; 1772e73a819dSTao Ma } 1773e73a819dSTao Ma 1774e73a819dSTao Ma ret = ocfs2_journal_access_rb(handle, ci, ref_leaf_bh, 1775e73a819dSTao Ma OCFS2_JOURNAL_ACCESS_WRITE); 1776e73a819dSTao Ma if (ret) { 1777e73a819dSTao Ma mlog_errno(ret); 1778e73a819dSTao Ma goto out; 1779e73a819dSTao Ma } 1780e73a819dSTao Ma 1781e73a819dSTao Ma if (index < le16_to_cpu(rf_list->rl_used)) 1782e73a819dSTao Ma memmove(&rf_list->rl_recs[index + 1], 1783e73a819dSTao Ma &rf_list->rl_recs[index], 1784e73a819dSTao Ma (le16_to_cpu(rf_list->rl_used) - index) * 1785e73a819dSTao Ma sizeof(struct ocfs2_refcount_rec)); 1786e73a819dSTao Ma 1787198aac28STao Ma trace_ocfs2_insert_refcount_rec( 1788198aac28STao Ma (unsigned long long)ref_leaf_bh->b_blocknr, index, 1789e73a819dSTao Ma (unsigned long long)le64_to_cpu(rec->r_cpos), 1790198aac28STao Ma le32_to_cpu(rec->r_clusters), le32_to_cpu(rec->r_refcount)); 1791e73a819dSTao Ma 1792e73a819dSTao Ma rf_list->rl_recs[index] = *rec; 1793e73a819dSTao Ma 1794e73a819dSTao Ma le16_add_cpu(&rf_list->rl_used, 1); 1795e73a819dSTao Ma 17967540c1a7STao Ma if (merge) 1797e73a819dSTao Ma ocfs2_refcount_rec_merge(rb, index); 1798e73a819dSTao Ma 1799ec20cec7SJoel Becker ocfs2_journal_dirty(handle, ref_leaf_bh); 1800e73a819dSTao Ma 1801e73a819dSTao Ma if (index == 0) { 1802e73a819dSTao Ma ret = ocfs2_adjust_refcount_rec(handle, ci, 1803e73a819dSTao Ma ref_root_bh, 1804e73a819dSTao Ma ref_leaf_bh, rec); 1805e73a819dSTao Ma if (ret) 1806e73a819dSTao Ma mlog_errno(ret); 1807e73a819dSTao Ma } 1808e73a819dSTao Ma out: 1809e73a819dSTao Ma brelse(new_bh); 1810e73a819dSTao Ma return ret; 1811e73a819dSTao Ma } 1812e73a819dSTao Ma 1813e73a819dSTao Ma /* 1814e73a819dSTao Ma * Split the refcount_rec indexed by "index" in ref_leaf_bh. 1815e73a819dSTao Ma * This is much simple than our b-tree code. 1816e73a819dSTao Ma * split_rec is the new refcount rec we want to insert. 1817e73a819dSTao Ma * If split_rec->r_refcount > 0, we are changing the refcount(in case we 1818e73a819dSTao Ma * increase refcount or decrease a refcount to non-zero). 1819e73a819dSTao Ma * If split_rec->r_refcount == 0, we are punching a hole in current refcount 1820e73a819dSTao Ma * rec( in case we decrease a refcount to zero). 1821e73a819dSTao Ma */ 1822e73a819dSTao Ma static int ocfs2_split_refcount_rec(handle_t *handle, 1823e73a819dSTao Ma struct ocfs2_caching_info *ci, 1824e73a819dSTao Ma struct buffer_head *ref_root_bh, 1825e73a819dSTao Ma struct buffer_head *ref_leaf_bh, 1826e73a819dSTao Ma struct ocfs2_refcount_rec *split_rec, 18277540c1a7STao Ma int index, int merge, 1828e73a819dSTao Ma struct ocfs2_alloc_context *meta_ac, 1829e73a819dSTao Ma struct ocfs2_cached_dealloc_ctxt *dealloc) 1830e73a819dSTao Ma { 1831e73a819dSTao Ma int ret, recs_need; 1832e73a819dSTao Ma u32 len; 1833e73a819dSTao Ma struct ocfs2_refcount_block *rb = 1834e73a819dSTao Ma (struct ocfs2_refcount_block *)ref_leaf_bh->b_data; 1835e73a819dSTao Ma struct ocfs2_refcount_list *rf_list = &rb->rf_records; 1836e73a819dSTao Ma struct ocfs2_refcount_rec *orig_rec = &rf_list->rl_recs[index]; 1837e73a819dSTao Ma struct ocfs2_refcount_rec *tail_rec = NULL; 1838e73a819dSTao Ma struct buffer_head *new_bh = NULL; 1839e73a819dSTao Ma 1840e73a819dSTao Ma BUG_ON(le32_to_cpu(rb->rf_flags) & OCFS2_REFCOUNT_TREE_FL); 1841e73a819dSTao Ma 1842198aac28STao Ma trace_ocfs2_split_refcount_rec(le64_to_cpu(orig_rec->r_cpos), 1843198aac28STao Ma le32_to_cpu(orig_rec->r_clusters), 1844198aac28STao Ma le32_to_cpu(orig_rec->r_refcount), 1845e73a819dSTao Ma le64_to_cpu(split_rec->r_cpos), 1846198aac28STao Ma le32_to_cpu(split_rec->r_clusters), 1847198aac28STao Ma le32_to_cpu(split_rec->r_refcount)); 1848e73a819dSTao Ma 1849e73a819dSTao Ma /* 1850e73a819dSTao Ma * If we just need to split the header or tail clusters, 1851e73a819dSTao Ma * no more recs are needed, just split is OK. 1852e73a819dSTao Ma * Otherwise we at least need one new recs. 1853e73a819dSTao Ma */ 1854e73a819dSTao Ma if (!split_rec->r_refcount && 1855e73a819dSTao Ma (split_rec->r_cpos == orig_rec->r_cpos || 1856e73a819dSTao Ma le64_to_cpu(split_rec->r_cpos) + 1857e73a819dSTao Ma le32_to_cpu(split_rec->r_clusters) == 1858e73a819dSTao Ma le64_to_cpu(orig_rec->r_cpos) + le32_to_cpu(orig_rec->r_clusters))) 1859e73a819dSTao Ma recs_need = 0; 1860e73a819dSTao Ma else 1861e73a819dSTao Ma recs_need = 1; 1862e73a819dSTao Ma 1863e73a819dSTao Ma /* 1864e73a819dSTao Ma * We need one more rec if we split in the middle and the new rec have 1865e73a819dSTao Ma * some refcount in it. 1866e73a819dSTao Ma */ 1867e73a819dSTao Ma if (split_rec->r_refcount && 1868e73a819dSTao Ma (split_rec->r_cpos != orig_rec->r_cpos && 1869e73a819dSTao Ma le64_to_cpu(split_rec->r_cpos) + 1870e73a819dSTao Ma le32_to_cpu(split_rec->r_clusters) != 1871e73a819dSTao Ma le64_to_cpu(orig_rec->r_cpos) + le32_to_cpu(orig_rec->r_clusters))) 1872e73a819dSTao Ma recs_need++; 1873e73a819dSTao Ma 1874e73a819dSTao Ma /* If the leaf block don't have enough record, expand it. */ 187512d4cec9STao Ma if (le16_to_cpu(rf_list->rl_used) + recs_need > 187612d4cec9STao Ma le16_to_cpu(rf_list->rl_count)) { 1877e73a819dSTao Ma struct ocfs2_refcount_rec tmp_rec; 1878e73a819dSTao Ma u64 cpos = le64_to_cpu(orig_rec->r_cpos); 1879e73a819dSTao Ma len = le32_to_cpu(orig_rec->r_clusters); 1880e73a819dSTao Ma ret = ocfs2_expand_refcount_tree(handle, ci, ref_root_bh, 1881e73a819dSTao Ma ref_leaf_bh, meta_ac); 1882e73a819dSTao Ma if (ret) { 1883e73a819dSTao Ma mlog_errno(ret); 1884e73a819dSTao Ma goto out; 1885e73a819dSTao Ma } 1886e73a819dSTao Ma 1887e73a819dSTao Ma /* 1888e73a819dSTao Ma * We have to re-get it since now cpos may be moved to 1889e73a819dSTao Ma * another leaf block. 1890e73a819dSTao Ma */ 1891e73a819dSTao Ma ret = ocfs2_get_refcount_rec(ci, ref_root_bh, 1892e73a819dSTao Ma cpos, len, &tmp_rec, &index, 1893e73a819dSTao Ma &new_bh); 1894e73a819dSTao Ma if (ret) { 1895e73a819dSTao Ma mlog_errno(ret); 1896e73a819dSTao Ma goto out; 1897e73a819dSTao Ma } 1898e73a819dSTao Ma 1899e73a819dSTao Ma ref_leaf_bh = new_bh; 1900e73a819dSTao Ma rb = (struct ocfs2_refcount_block *)ref_leaf_bh->b_data; 1901e73a819dSTao Ma rf_list = &rb->rf_records; 1902e73a819dSTao Ma orig_rec = &rf_list->rl_recs[index]; 1903e73a819dSTao Ma } 1904e73a819dSTao Ma 1905e73a819dSTao Ma ret = ocfs2_journal_access_rb(handle, ci, ref_leaf_bh, 1906e73a819dSTao Ma OCFS2_JOURNAL_ACCESS_WRITE); 1907e73a819dSTao Ma if (ret) { 1908e73a819dSTao Ma mlog_errno(ret); 1909e73a819dSTao Ma goto out; 1910e73a819dSTao Ma } 1911e73a819dSTao Ma 1912e73a819dSTao Ma /* 1913e73a819dSTao Ma * We have calculated out how many new records we need and store 1914e73a819dSTao Ma * in recs_need, so spare enough space first by moving the records 1915e73a819dSTao Ma * after "index" to the end. 1916e73a819dSTao Ma */ 1917e73a819dSTao Ma if (index != le16_to_cpu(rf_list->rl_used) - 1) 1918e73a819dSTao Ma memmove(&rf_list->rl_recs[index + 1 + recs_need], 1919e73a819dSTao Ma &rf_list->rl_recs[index + 1], 1920e73a819dSTao Ma (le16_to_cpu(rf_list->rl_used) - index - 1) * 1921e73a819dSTao Ma sizeof(struct ocfs2_refcount_rec)); 1922e73a819dSTao Ma 1923e73a819dSTao Ma len = (le64_to_cpu(orig_rec->r_cpos) + 1924e73a819dSTao Ma le32_to_cpu(orig_rec->r_clusters)) - 1925e73a819dSTao Ma (le64_to_cpu(split_rec->r_cpos) + 1926e73a819dSTao Ma le32_to_cpu(split_rec->r_clusters)); 1927e73a819dSTao Ma 1928e73a819dSTao Ma /* 1929e73a819dSTao Ma * If we have "len", the we will split in the tail and move it 1930e73a819dSTao Ma * to the end of the space we have just spared. 1931e73a819dSTao Ma */ 1932e73a819dSTao Ma if (len) { 1933e73a819dSTao Ma tail_rec = &rf_list->rl_recs[index + recs_need]; 1934e73a819dSTao Ma 1935e73a819dSTao Ma memcpy(tail_rec, orig_rec, sizeof(struct ocfs2_refcount_rec)); 1936e73a819dSTao Ma le64_add_cpu(&tail_rec->r_cpos, 1937e73a819dSTao Ma le32_to_cpu(tail_rec->r_clusters) - len); 193812d4cec9STao Ma tail_rec->r_clusters = cpu_to_le32(len); 1939e73a819dSTao Ma } 1940e73a819dSTao Ma 1941e73a819dSTao Ma /* 1942e73a819dSTao Ma * If the split pos isn't the same as the original one, we need to 1943e73a819dSTao Ma * split in the head. 1944e73a819dSTao Ma * 1945e73a819dSTao Ma * Note: We have the chance that split_rec.r_refcount = 0, 1946e73a819dSTao Ma * recs_need = 0 and len > 0, which means we just cut the head from 1947e73a819dSTao Ma * the orig_rec and in that case we have done some modification in 1948e73a819dSTao Ma * orig_rec above, so the check for r_cpos is faked. 1949e73a819dSTao Ma */ 1950e73a819dSTao Ma if (split_rec->r_cpos != orig_rec->r_cpos && tail_rec != orig_rec) { 1951e73a819dSTao Ma len = le64_to_cpu(split_rec->r_cpos) - 1952e73a819dSTao Ma le64_to_cpu(orig_rec->r_cpos); 1953e73a819dSTao Ma orig_rec->r_clusters = cpu_to_le32(len); 1954e73a819dSTao Ma index++; 1955e73a819dSTao Ma } 1956e73a819dSTao Ma 1957e73a819dSTao Ma le16_add_cpu(&rf_list->rl_used, recs_need); 1958e73a819dSTao Ma 1959e73a819dSTao Ma if (split_rec->r_refcount) { 1960e73a819dSTao Ma rf_list->rl_recs[index] = *split_rec; 1961198aac28STao Ma trace_ocfs2_split_refcount_rec_insert( 1962198aac28STao Ma (unsigned long long)ref_leaf_bh->b_blocknr, index, 1963e73a819dSTao Ma (unsigned long long)le64_to_cpu(split_rec->r_cpos), 1964e73a819dSTao Ma le32_to_cpu(split_rec->r_clusters), 1965198aac28STao Ma le32_to_cpu(split_rec->r_refcount)); 1966e73a819dSTao Ma 19677540c1a7STao Ma if (merge) 1968e73a819dSTao Ma ocfs2_refcount_rec_merge(rb, index); 1969e73a819dSTao Ma } 1970e73a819dSTao Ma 1971ec20cec7SJoel Becker ocfs2_journal_dirty(handle, ref_leaf_bh); 1972e73a819dSTao Ma 1973e73a819dSTao Ma out: 1974e73a819dSTao Ma brelse(new_bh); 1975e73a819dSTao Ma return ret; 1976e73a819dSTao Ma } 1977e73a819dSTao Ma 19787540c1a7STao Ma static int __ocfs2_increase_refcount(handle_t *handle, 1979e73a819dSTao Ma struct ocfs2_caching_info *ci, 1980e73a819dSTao Ma struct buffer_head *ref_root_bh, 19817540c1a7STao Ma u64 cpos, u32 len, int merge, 1982e73a819dSTao Ma struct ocfs2_alloc_context *meta_ac, 1983e73a819dSTao Ma struct ocfs2_cached_dealloc_ctxt *dealloc) 1984e73a819dSTao Ma { 1985e73a819dSTao Ma int ret = 0, index; 1986e73a819dSTao Ma struct buffer_head *ref_leaf_bh = NULL; 1987e73a819dSTao Ma struct ocfs2_refcount_rec rec; 1988e73a819dSTao Ma unsigned int set_len = 0; 1989e73a819dSTao Ma 1990198aac28STao Ma trace_ocfs2_increase_refcount_begin( 1991e73a819dSTao Ma (unsigned long long)ocfs2_metadata_cache_owner(ci), 1992e73a819dSTao Ma (unsigned long long)cpos, len); 1993e73a819dSTao Ma 1994e73a819dSTao Ma while (len) { 1995e73a819dSTao Ma ret = ocfs2_get_refcount_rec(ci, ref_root_bh, 1996e73a819dSTao Ma cpos, len, &rec, &index, 1997e73a819dSTao Ma &ref_leaf_bh); 1998e73a819dSTao Ma if (ret) { 1999e73a819dSTao Ma mlog_errno(ret); 2000e73a819dSTao Ma goto out; 2001e73a819dSTao Ma } 2002e73a819dSTao Ma 2003e73a819dSTao Ma set_len = le32_to_cpu(rec.r_clusters); 2004e73a819dSTao Ma 2005e73a819dSTao Ma /* 2006e73a819dSTao Ma * Here we may meet with 3 situations: 2007e73a819dSTao Ma * 2008e73a819dSTao Ma * 1. If we find an already existing record, and the length 2009e73a819dSTao Ma * is the same, cool, we just need to increase the r_refcount 2010e73a819dSTao Ma * and it is OK. 2011e73a819dSTao Ma * 2. If we find a hole, just insert it with r_refcount = 1. 2012e73a819dSTao Ma * 3. If we are in the middle of one extent record, split 2013e73a819dSTao Ma * it. 2014e73a819dSTao Ma */ 2015e73a819dSTao Ma if (rec.r_refcount && le64_to_cpu(rec.r_cpos) == cpos && 2016e73a819dSTao Ma set_len <= len) { 2017198aac28STao Ma trace_ocfs2_increase_refcount_change( 2018198aac28STao Ma (unsigned long long)cpos, set_len, 2019e73a819dSTao Ma le32_to_cpu(rec.r_refcount)); 2020e73a819dSTao Ma ret = ocfs2_change_refcount_rec(handle, ci, 20217540c1a7STao Ma ref_leaf_bh, index, 20227540c1a7STao Ma merge, 1); 2023e73a819dSTao Ma if (ret) { 2024e73a819dSTao Ma mlog_errno(ret); 2025e73a819dSTao Ma goto out; 2026e73a819dSTao Ma } 2027e73a819dSTao Ma } else if (!rec.r_refcount) { 2028e73a819dSTao Ma rec.r_refcount = cpu_to_le32(1); 2029e73a819dSTao Ma 2030198aac28STao Ma trace_ocfs2_increase_refcount_insert( 2031e73a819dSTao Ma (unsigned long long)le64_to_cpu(rec.r_cpos), 2032e73a819dSTao Ma set_len); 2033e73a819dSTao Ma ret = ocfs2_insert_refcount_rec(handle, ci, ref_root_bh, 2034e73a819dSTao Ma ref_leaf_bh, 20357540c1a7STao Ma &rec, index, 20367540c1a7STao Ma merge, meta_ac); 2037e73a819dSTao Ma if (ret) { 2038e73a819dSTao Ma mlog_errno(ret); 2039e73a819dSTao Ma goto out; 2040e73a819dSTao Ma } 2041e73a819dSTao Ma } else { 2042e73a819dSTao Ma set_len = min((u64)(cpos + len), 2043e73a819dSTao Ma le64_to_cpu(rec.r_cpos) + set_len) - cpos; 2044e73a819dSTao Ma rec.r_cpos = cpu_to_le64(cpos); 2045e73a819dSTao Ma rec.r_clusters = cpu_to_le32(set_len); 2046e73a819dSTao Ma le32_add_cpu(&rec.r_refcount, 1); 2047e73a819dSTao Ma 2048198aac28STao Ma trace_ocfs2_increase_refcount_split( 2049e73a819dSTao Ma (unsigned long long)le64_to_cpu(rec.r_cpos), 2050e73a819dSTao Ma set_len, le32_to_cpu(rec.r_refcount)); 2051e73a819dSTao Ma ret = ocfs2_split_refcount_rec(handle, ci, 2052e73a819dSTao Ma ref_root_bh, ref_leaf_bh, 20537540c1a7STao Ma &rec, index, merge, 2054e73a819dSTao Ma meta_ac, dealloc); 2055e73a819dSTao Ma if (ret) { 2056e73a819dSTao Ma mlog_errno(ret); 2057e73a819dSTao Ma goto out; 2058e73a819dSTao Ma } 2059e73a819dSTao Ma } 2060e73a819dSTao Ma 2061e73a819dSTao Ma cpos += set_len; 2062e73a819dSTao Ma len -= set_len; 2063e73a819dSTao Ma brelse(ref_leaf_bh); 2064e73a819dSTao Ma ref_leaf_bh = NULL; 2065e73a819dSTao Ma } 2066e73a819dSTao Ma 2067e73a819dSTao Ma out: 2068e73a819dSTao Ma brelse(ref_leaf_bh); 2069e73a819dSTao Ma return ret; 2070e73a819dSTao Ma } 20711823cb0bSTao Ma 20721823cb0bSTao Ma static int ocfs2_remove_refcount_extent(handle_t *handle, 20731823cb0bSTao Ma struct ocfs2_caching_info *ci, 20741823cb0bSTao Ma struct buffer_head *ref_root_bh, 20751823cb0bSTao Ma struct buffer_head *ref_leaf_bh, 20761823cb0bSTao Ma struct ocfs2_alloc_context *meta_ac, 20771823cb0bSTao Ma struct ocfs2_cached_dealloc_ctxt *dealloc) 20781823cb0bSTao Ma { 20791823cb0bSTao Ma int ret; 20801823cb0bSTao Ma struct super_block *sb = ocfs2_metadata_cache_get_super(ci); 20811823cb0bSTao Ma struct ocfs2_refcount_block *rb = 20821823cb0bSTao Ma (struct ocfs2_refcount_block *)ref_leaf_bh->b_data; 20831823cb0bSTao Ma struct ocfs2_extent_tree et; 20841823cb0bSTao Ma 20851823cb0bSTao Ma BUG_ON(rb->rf_records.rl_used); 20861823cb0bSTao Ma 2087198aac28STao Ma trace_ocfs2_remove_refcount_extent( 2088198aac28STao Ma (unsigned long long)ocfs2_metadata_cache_owner(ci), 2089198aac28STao Ma (unsigned long long)ref_leaf_bh->b_blocknr, 2090198aac28STao Ma le32_to_cpu(rb->rf_cpos)); 2091198aac28STao Ma 20921823cb0bSTao Ma ocfs2_init_refcount_extent_tree(&et, ci, ref_root_bh); 20931823cb0bSTao Ma ret = ocfs2_remove_extent(handle, &et, le32_to_cpu(rb->rf_cpos), 20941823cb0bSTao Ma 1, meta_ac, dealloc); 20951823cb0bSTao Ma if (ret) { 20961823cb0bSTao Ma mlog_errno(ret); 20971823cb0bSTao Ma goto out; 20981823cb0bSTao Ma } 20991823cb0bSTao Ma 21001823cb0bSTao Ma ocfs2_remove_from_cache(ci, ref_leaf_bh); 21011823cb0bSTao Ma 21021823cb0bSTao Ma /* 21031823cb0bSTao Ma * add the freed block to the dealloc so that it will be freed 21041823cb0bSTao Ma * when we run dealloc. 21051823cb0bSTao Ma */ 21061823cb0bSTao Ma ret = ocfs2_cache_block_dealloc(dealloc, EXTENT_ALLOC_SYSTEM_INODE, 21071823cb0bSTao Ma le16_to_cpu(rb->rf_suballoc_slot), 210874380c47STao Ma le64_to_cpu(rb->rf_suballoc_loc), 21091823cb0bSTao Ma le64_to_cpu(rb->rf_blkno), 21101823cb0bSTao Ma le16_to_cpu(rb->rf_suballoc_bit)); 21111823cb0bSTao Ma if (ret) { 21121823cb0bSTao Ma mlog_errno(ret); 21131823cb0bSTao Ma goto out; 21141823cb0bSTao Ma } 21151823cb0bSTao Ma 21161823cb0bSTao Ma ret = ocfs2_journal_access_rb(handle, ci, ref_root_bh, 21171823cb0bSTao Ma OCFS2_JOURNAL_ACCESS_WRITE); 21181823cb0bSTao Ma if (ret) { 21191823cb0bSTao Ma mlog_errno(ret); 21201823cb0bSTao Ma goto out; 21211823cb0bSTao Ma } 21221823cb0bSTao Ma 21231823cb0bSTao Ma rb = (struct ocfs2_refcount_block *)ref_root_bh->b_data; 21241823cb0bSTao Ma 21251823cb0bSTao Ma le32_add_cpu(&rb->rf_clusters, -1); 21261823cb0bSTao Ma 21271823cb0bSTao Ma /* 21281823cb0bSTao Ma * check whether we need to restore the root refcount block if 21291823cb0bSTao Ma * there is no leaf extent block at atll. 21301823cb0bSTao Ma */ 21311823cb0bSTao Ma if (!rb->rf_list.l_next_free_rec) { 21321823cb0bSTao Ma BUG_ON(rb->rf_clusters); 21331823cb0bSTao Ma 2134198aac28STao Ma trace_ocfs2_restore_refcount_block( 21351823cb0bSTao Ma (unsigned long long)ref_root_bh->b_blocknr); 21361823cb0bSTao Ma 21371823cb0bSTao Ma rb->rf_flags = 0; 21381823cb0bSTao Ma rb->rf_parent = 0; 21391823cb0bSTao Ma rb->rf_cpos = 0; 21401823cb0bSTao Ma memset(&rb->rf_records, 0, sb->s_blocksize - 21411823cb0bSTao Ma offsetof(struct ocfs2_refcount_block, rf_records)); 21421823cb0bSTao Ma rb->rf_records.rl_count = 21431823cb0bSTao Ma cpu_to_le16(ocfs2_refcount_recs_per_rb(sb)); 21441823cb0bSTao Ma } 21451823cb0bSTao Ma 21461823cb0bSTao Ma ocfs2_journal_dirty(handle, ref_root_bh); 21471823cb0bSTao Ma 21481823cb0bSTao Ma out: 21491823cb0bSTao Ma return ret; 21501823cb0bSTao Ma } 21511823cb0bSTao Ma 21527540c1a7STao Ma int ocfs2_increase_refcount(handle_t *handle, 21537540c1a7STao Ma struct ocfs2_caching_info *ci, 21547540c1a7STao Ma struct buffer_head *ref_root_bh, 21557540c1a7STao Ma u64 cpos, u32 len, 21567540c1a7STao Ma struct ocfs2_alloc_context *meta_ac, 21577540c1a7STao Ma struct ocfs2_cached_dealloc_ctxt *dealloc) 21587540c1a7STao Ma { 21597540c1a7STao Ma return __ocfs2_increase_refcount(handle, ci, ref_root_bh, 21607540c1a7STao Ma cpos, len, 1, 21617540c1a7STao Ma meta_ac, dealloc); 21627540c1a7STao Ma } 21637540c1a7STao Ma 21641823cb0bSTao Ma static int ocfs2_decrease_refcount_rec(handle_t *handle, 21651823cb0bSTao Ma struct ocfs2_caching_info *ci, 21661823cb0bSTao Ma struct buffer_head *ref_root_bh, 21671823cb0bSTao Ma struct buffer_head *ref_leaf_bh, 21681823cb0bSTao Ma int index, u64 cpos, unsigned int len, 21691823cb0bSTao Ma struct ocfs2_alloc_context *meta_ac, 21701823cb0bSTao Ma struct ocfs2_cached_dealloc_ctxt *dealloc) 21711823cb0bSTao Ma { 21721823cb0bSTao Ma int ret; 21731823cb0bSTao Ma struct ocfs2_refcount_block *rb = 21741823cb0bSTao Ma (struct ocfs2_refcount_block *)ref_leaf_bh->b_data; 21751823cb0bSTao Ma struct ocfs2_refcount_rec *rec = &rb->rf_records.rl_recs[index]; 21761823cb0bSTao Ma 21771823cb0bSTao Ma BUG_ON(cpos < le64_to_cpu(rec->r_cpos)); 21781823cb0bSTao Ma BUG_ON(cpos + len > 21791823cb0bSTao Ma le64_to_cpu(rec->r_cpos) + le32_to_cpu(rec->r_clusters)); 21801823cb0bSTao Ma 2181198aac28STao Ma trace_ocfs2_decrease_refcount_rec( 2182198aac28STao Ma (unsigned long long)ocfs2_metadata_cache_owner(ci), 2183198aac28STao Ma (unsigned long long)cpos, len); 2184198aac28STao Ma 21851823cb0bSTao Ma if (cpos == le64_to_cpu(rec->r_cpos) && 21861823cb0bSTao Ma len == le32_to_cpu(rec->r_clusters)) 21871823cb0bSTao Ma ret = ocfs2_change_refcount_rec(handle, ci, 21887540c1a7STao Ma ref_leaf_bh, index, 1, -1); 21891823cb0bSTao Ma else { 21901823cb0bSTao Ma struct ocfs2_refcount_rec split = *rec; 21911823cb0bSTao Ma split.r_cpos = cpu_to_le64(cpos); 21921823cb0bSTao Ma split.r_clusters = cpu_to_le32(len); 21931823cb0bSTao Ma 21941823cb0bSTao Ma le32_add_cpu(&split.r_refcount, -1); 21951823cb0bSTao Ma 21961823cb0bSTao Ma ret = ocfs2_split_refcount_rec(handle, ci, 21971823cb0bSTao Ma ref_root_bh, ref_leaf_bh, 21987540c1a7STao Ma &split, index, 1, 21991823cb0bSTao Ma meta_ac, dealloc); 22001823cb0bSTao Ma } 22011823cb0bSTao Ma 22021823cb0bSTao Ma if (ret) { 22031823cb0bSTao Ma mlog_errno(ret); 22041823cb0bSTao Ma goto out; 22051823cb0bSTao Ma } 22061823cb0bSTao Ma 22071823cb0bSTao Ma /* Remove the leaf refcount block if it contains no refcount record. */ 22081823cb0bSTao Ma if (!rb->rf_records.rl_used && ref_leaf_bh != ref_root_bh) { 22091823cb0bSTao Ma ret = ocfs2_remove_refcount_extent(handle, ci, ref_root_bh, 22101823cb0bSTao Ma ref_leaf_bh, meta_ac, 22111823cb0bSTao Ma dealloc); 22121823cb0bSTao Ma if (ret) 22131823cb0bSTao Ma mlog_errno(ret); 22141823cb0bSTao Ma } 22151823cb0bSTao Ma 22161823cb0bSTao Ma out: 22171823cb0bSTao Ma return ret; 22181823cb0bSTao Ma } 22191823cb0bSTao Ma 22201823cb0bSTao Ma static int __ocfs2_decrease_refcount(handle_t *handle, 22211823cb0bSTao Ma struct ocfs2_caching_info *ci, 22221823cb0bSTao Ma struct buffer_head *ref_root_bh, 22231823cb0bSTao Ma u64 cpos, u32 len, 22241823cb0bSTao Ma struct ocfs2_alloc_context *meta_ac, 22256ae23c55STao Ma struct ocfs2_cached_dealloc_ctxt *dealloc, 22266ae23c55STao Ma int delete) 22271823cb0bSTao Ma { 22281823cb0bSTao Ma int ret = 0, index = 0; 22291823cb0bSTao Ma struct ocfs2_refcount_rec rec; 22301823cb0bSTao Ma unsigned int r_count = 0, r_len; 22311823cb0bSTao Ma struct super_block *sb = ocfs2_metadata_cache_get_super(ci); 22321823cb0bSTao Ma struct buffer_head *ref_leaf_bh = NULL; 22331823cb0bSTao Ma 2234198aac28STao Ma trace_ocfs2_decrease_refcount( 22351823cb0bSTao Ma (unsigned long long)ocfs2_metadata_cache_owner(ci), 22366ae23c55STao Ma (unsigned long long)cpos, len, delete); 22371823cb0bSTao Ma 22381823cb0bSTao Ma while (len) { 22391823cb0bSTao Ma ret = ocfs2_get_refcount_rec(ci, ref_root_bh, 22401823cb0bSTao Ma cpos, len, &rec, &index, 22411823cb0bSTao Ma &ref_leaf_bh); 22421823cb0bSTao Ma if (ret) { 22431823cb0bSTao Ma mlog_errno(ret); 22441823cb0bSTao Ma goto out; 22451823cb0bSTao Ma } 22461823cb0bSTao Ma 22471823cb0bSTao Ma r_count = le32_to_cpu(rec.r_refcount); 22481823cb0bSTao Ma BUG_ON(r_count == 0); 22496ae23c55STao Ma if (!delete) 22506ae23c55STao Ma BUG_ON(r_count > 1); 22511823cb0bSTao Ma 22521823cb0bSTao Ma r_len = min((u64)(cpos + len), le64_to_cpu(rec.r_cpos) + 22531823cb0bSTao Ma le32_to_cpu(rec.r_clusters)) - cpos; 22541823cb0bSTao Ma 22551823cb0bSTao Ma ret = ocfs2_decrease_refcount_rec(handle, ci, ref_root_bh, 22561823cb0bSTao Ma ref_leaf_bh, index, 22571823cb0bSTao Ma cpos, r_len, 22581823cb0bSTao Ma meta_ac, dealloc); 22591823cb0bSTao Ma if (ret) { 22601823cb0bSTao Ma mlog_errno(ret); 22611823cb0bSTao Ma goto out; 22621823cb0bSTao Ma } 22631823cb0bSTao Ma 22646ae23c55STao Ma if (le32_to_cpu(rec.r_refcount) == 1 && delete) { 22651823cb0bSTao Ma ret = ocfs2_cache_cluster_dealloc(dealloc, 22661823cb0bSTao Ma ocfs2_clusters_to_blocks(sb, cpos), 22671823cb0bSTao Ma r_len); 22681823cb0bSTao Ma if (ret) { 22691823cb0bSTao Ma mlog_errno(ret); 22701823cb0bSTao Ma goto out; 22711823cb0bSTao Ma } 22721823cb0bSTao Ma } 22731823cb0bSTao Ma 22741823cb0bSTao Ma cpos += r_len; 22751823cb0bSTao Ma len -= r_len; 22761823cb0bSTao Ma brelse(ref_leaf_bh); 22771823cb0bSTao Ma ref_leaf_bh = NULL; 22781823cb0bSTao Ma } 22791823cb0bSTao Ma 22801823cb0bSTao Ma out: 22811823cb0bSTao Ma brelse(ref_leaf_bh); 22821823cb0bSTao Ma return ret; 22831823cb0bSTao Ma } 22841823cb0bSTao Ma 22851823cb0bSTao Ma /* Caller must hold refcount tree lock. */ 22861823cb0bSTao Ma int ocfs2_decrease_refcount(struct inode *inode, 22871823cb0bSTao Ma handle_t *handle, u32 cpos, u32 len, 22881823cb0bSTao Ma struct ocfs2_alloc_context *meta_ac, 22896ae23c55STao Ma struct ocfs2_cached_dealloc_ctxt *dealloc, 22906ae23c55STao Ma int delete) 22911823cb0bSTao Ma { 22921823cb0bSTao Ma int ret; 22931823cb0bSTao Ma u64 ref_blkno; 22941823cb0bSTao Ma struct buffer_head *ref_root_bh = NULL; 22951823cb0bSTao Ma struct ocfs2_refcount_tree *tree; 22961823cb0bSTao Ma 229784e40080SDarrick J. Wong BUG_ON(!ocfs2_is_refcount_inode(inode)); 22981823cb0bSTao Ma 22991823cb0bSTao Ma ret = ocfs2_get_refcount_block(inode, &ref_blkno); 23001823cb0bSTao Ma if (ret) { 23011823cb0bSTao Ma mlog_errno(ret); 23021823cb0bSTao Ma goto out; 23031823cb0bSTao Ma } 23041823cb0bSTao Ma 23051823cb0bSTao Ma ret = ocfs2_get_refcount_tree(OCFS2_SB(inode->i_sb), ref_blkno, &tree); 23061823cb0bSTao Ma if (ret) { 23071823cb0bSTao Ma mlog_errno(ret); 23081823cb0bSTao Ma goto out; 23091823cb0bSTao Ma } 23101823cb0bSTao Ma 23111823cb0bSTao Ma ret = ocfs2_read_refcount_block(&tree->rf_ci, tree->rf_blkno, 23121823cb0bSTao Ma &ref_root_bh); 23131823cb0bSTao Ma if (ret) { 23141823cb0bSTao Ma mlog_errno(ret); 23151823cb0bSTao Ma goto out; 23161823cb0bSTao Ma } 23171823cb0bSTao Ma 23181823cb0bSTao Ma ret = __ocfs2_decrease_refcount(handle, &tree->rf_ci, ref_root_bh, 23196ae23c55STao Ma cpos, len, meta_ac, dealloc, delete); 23201823cb0bSTao Ma if (ret) 23211823cb0bSTao Ma mlog_errno(ret); 23221823cb0bSTao Ma out: 23231823cb0bSTao Ma brelse(ref_root_bh); 23241823cb0bSTao Ma return ret; 23251823cb0bSTao Ma } 23261aa75feaSTao Ma 23271aa75feaSTao Ma /* 23281aa75feaSTao Ma * Mark the already-existing extent at cpos as refcounted for len clusters. 23291aa75feaSTao Ma * This adds the refcount extent flag. 23301aa75feaSTao Ma * 23311aa75feaSTao Ma * If the existing extent is larger than the request, initiate a 23321aa75feaSTao Ma * split. An attempt will be made at merging with adjacent extents. 23331aa75feaSTao Ma * 23341aa75feaSTao Ma * The caller is responsible for passing down meta_ac if we'll need it. 23351aa75feaSTao Ma */ 23361aa75feaSTao Ma static int ocfs2_mark_extent_refcounted(struct inode *inode, 23371aa75feaSTao Ma struct ocfs2_extent_tree *et, 23381aa75feaSTao Ma handle_t *handle, u32 cpos, 23391aa75feaSTao Ma u32 len, u32 phys, 23401aa75feaSTao Ma struct ocfs2_alloc_context *meta_ac, 23411aa75feaSTao Ma struct ocfs2_cached_dealloc_ctxt *dealloc) 23421aa75feaSTao Ma { 23431aa75feaSTao Ma int ret; 23441aa75feaSTao Ma 2345198aac28STao Ma trace_ocfs2_mark_extent_refcounted(OCFS2_I(inode)->ip_blkno, 2346198aac28STao Ma cpos, len, phys); 23471aa75feaSTao Ma 23481aa75feaSTao Ma if (!ocfs2_refcount_tree(OCFS2_SB(inode->i_sb))) { 23497ecef14aSJoe Perches ret = ocfs2_error(inode->i_sb, "Inode %lu want to use refcount tree, but the feature bit is not set in the super block\n", 23507ecef14aSJoe Perches inode->i_ino); 23511aa75feaSTao Ma goto out; 23521aa75feaSTao Ma } 23531aa75feaSTao Ma 23541aa75feaSTao Ma ret = ocfs2_change_extent_flag(handle, et, cpos, 23551aa75feaSTao Ma len, phys, meta_ac, dealloc, 23561aa75feaSTao Ma OCFS2_EXT_REFCOUNTED, 0); 23571aa75feaSTao Ma if (ret) 23581aa75feaSTao Ma mlog_errno(ret); 23591aa75feaSTao Ma 23601aa75feaSTao Ma out: 23611aa75feaSTao Ma return ret; 23621aa75feaSTao Ma } 2363bcbbb24aSTao Ma 2364bcbbb24aSTao Ma /* 2365bcbbb24aSTao Ma * Given some contiguous physical clusters, calculate what we need 2366bcbbb24aSTao Ma * for modifying their refcount. 2367bcbbb24aSTao Ma */ 2368bcbbb24aSTao Ma static int ocfs2_calc_refcount_meta_credits(struct super_block *sb, 2369bcbbb24aSTao Ma struct ocfs2_caching_info *ci, 2370bcbbb24aSTao Ma struct buffer_head *ref_root_bh, 2371bcbbb24aSTao Ma u64 start_cpos, 2372bcbbb24aSTao Ma u32 clusters, 2373bcbbb24aSTao Ma int *meta_add, 2374bcbbb24aSTao Ma int *credits) 2375bcbbb24aSTao Ma { 2376bcbbb24aSTao Ma int ret = 0, index, ref_blocks = 0, recs_add = 0; 2377bcbbb24aSTao Ma u64 cpos = start_cpos; 2378bcbbb24aSTao Ma struct ocfs2_refcount_block *rb; 2379bcbbb24aSTao Ma struct ocfs2_refcount_rec rec; 2380bcbbb24aSTao Ma struct buffer_head *ref_leaf_bh = NULL, *prev_bh = NULL; 2381bcbbb24aSTao Ma u32 len; 2382bcbbb24aSTao Ma 2383bcbbb24aSTao Ma while (clusters) { 2384bcbbb24aSTao Ma ret = ocfs2_get_refcount_rec(ci, ref_root_bh, 2385bcbbb24aSTao Ma cpos, clusters, &rec, 2386bcbbb24aSTao Ma &index, &ref_leaf_bh); 2387bcbbb24aSTao Ma if (ret) { 2388bcbbb24aSTao Ma mlog_errno(ret); 2389bcbbb24aSTao Ma goto out; 2390bcbbb24aSTao Ma } 2391bcbbb24aSTao Ma 2392bcbbb24aSTao Ma if (ref_leaf_bh != prev_bh) { 2393bcbbb24aSTao Ma /* 2394bcbbb24aSTao Ma * Now we encounter a new leaf block, so calculate 2395bcbbb24aSTao Ma * whether we need to extend the old leaf. 2396bcbbb24aSTao Ma */ 2397bcbbb24aSTao Ma if (prev_bh) { 2398bcbbb24aSTao Ma rb = (struct ocfs2_refcount_block *) 2399bcbbb24aSTao Ma prev_bh->b_data; 2400bcbbb24aSTao Ma 2401e1bf4cc6SAl Viro if (le16_to_cpu(rb->rf_records.rl_used) + 2402bcbbb24aSTao Ma recs_add > 2403bcbbb24aSTao Ma le16_to_cpu(rb->rf_records.rl_count)) 2404bcbbb24aSTao Ma ref_blocks++; 2405bcbbb24aSTao Ma } 2406bcbbb24aSTao Ma 2407bcbbb24aSTao Ma recs_add = 0; 2408bcbbb24aSTao Ma *credits += 1; 2409bcbbb24aSTao Ma brelse(prev_bh); 2410bcbbb24aSTao Ma prev_bh = ref_leaf_bh; 2411bcbbb24aSTao Ma get_bh(prev_bh); 2412bcbbb24aSTao Ma } 2413bcbbb24aSTao Ma 2414198aac28STao Ma trace_ocfs2_calc_refcount_meta_credits_iterate( 2415bcbbb24aSTao Ma recs_add, (unsigned long long)cpos, clusters, 2416bcbbb24aSTao Ma (unsigned long long)le64_to_cpu(rec.r_cpos), 2417bcbbb24aSTao Ma le32_to_cpu(rec.r_clusters), 2418bcbbb24aSTao Ma le32_to_cpu(rec.r_refcount), index); 2419bcbbb24aSTao Ma 2420bcbbb24aSTao Ma len = min((u64)cpos + clusters, le64_to_cpu(rec.r_cpos) + 2421bcbbb24aSTao Ma le32_to_cpu(rec.r_clusters)) - cpos; 2422bcbbb24aSTao Ma /* 2423bcbbb24aSTao Ma * We record all the records which will be inserted to the 2424bcbbb24aSTao Ma * same refcount block, so that we can tell exactly whether 2425bcbbb24aSTao Ma * we need a new refcount block or not. 24268a2e70c4STao Ma * 24278a2e70c4STao Ma * If we will insert a new one, this is easy and only happens 24288a2e70c4STao Ma * during adding refcounted flag to the extent, so we don't 24298a2e70c4STao Ma * have a chance of spliting. We just need one record. 24308a2e70c4STao Ma * 24318a2e70c4STao Ma * If the refcount rec already exists, that would be a little 24328a2e70c4STao Ma * complicated. we may have to: 24338a2e70c4STao Ma * 1) split at the beginning if the start pos isn't aligned. 24348a2e70c4STao Ma * we need 1 more record in this case. 24358a2e70c4STao Ma * 2) split int the end if the end pos isn't aligned. 24368a2e70c4STao Ma * we need 1 more record in this case. 24378a2e70c4STao Ma * 3) split in the middle because of file system fragmentation. 24388a2e70c4STao Ma * we need 2 more records in this case(we can't detect this 24398a2e70c4STao Ma * beforehand, so always think of the worst case). 2440bcbbb24aSTao Ma */ 2441bcbbb24aSTao Ma if (rec.r_refcount) { 24428a2e70c4STao Ma recs_add += 2; 2443bcbbb24aSTao Ma /* Check whether we need a split at the beginning. */ 2444bcbbb24aSTao Ma if (cpos == start_cpos && 2445bcbbb24aSTao Ma cpos != le64_to_cpu(rec.r_cpos)) 2446bcbbb24aSTao Ma recs_add++; 2447bcbbb24aSTao Ma 2448bcbbb24aSTao Ma /* Check whether we need a split in the end. */ 2449bcbbb24aSTao Ma if (cpos + clusters < le64_to_cpu(rec.r_cpos) + 2450bcbbb24aSTao Ma le32_to_cpu(rec.r_clusters)) 2451bcbbb24aSTao Ma recs_add++; 2452bcbbb24aSTao Ma } else 2453bcbbb24aSTao Ma recs_add++; 2454bcbbb24aSTao Ma 2455bcbbb24aSTao Ma brelse(ref_leaf_bh); 2456bcbbb24aSTao Ma ref_leaf_bh = NULL; 2457bcbbb24aSTao Ma clusters -= len; 2458bcbbb24aSTao Ma cpos += len; 2459bcbbb24aSTao Ma } 2460bcbbb24aSTao Ma 2461bcbbb24aSTao Ma if (prev_bh) { 2462bcbbb24aSTao Ma rb = (struct ocfs2_refcount_block *)prev_bh->b_data; 2463bcbbb24aSTao Ma 2464e1bf4cc6SAl Viro if (le16_to_cpu(rb->rf_records.rl_used) + recs_add > 2465bcbbb24aSTao Ma le16_to_cpu(rb->rf_records.rl_count)) 2466bcbbb24aSTao Ma ref_blocks++; 2467bcbbb24aSTao Ma 2468bcbbb24aSTao Ma *credits += 1; 2469bcbbb24aSTao Ma } 2470bcbbb24aSTao Ma 2471bcbbb24aSTao Ma if (!ref_blocks) 2472bcbbb24aSTao Ma goto out; 2473bcbbb24aSTao Ma 2474bcbbb24aSTao Ma *meta_add += ref_blocks; 2475bcbbb24aSTao Ma *credits += ref_blocks; 2476bcbbb24aSTao Ma 2477bcbbb24aSTao Ma /* 2478bcbbb24aSTao Ma * So we may need ref_blocks to insert into the tree. 2479bcbbb24aSTao Ma * That also means we need to change the b-tree and add that number 2480bcbbb24aSTao Ma * of records since we never merge them. 2481bcbbb24aSTao Ma * We need one more block for expansion since the new created leaf 2482bcbbb24aSTao Ma * block is also full and needs split. 2483bcbbb24aSTao Ma */ 2484bcbbb24aSTao Ma rb = (struct ocfs2_refcount_block *)ref_root_bh->b_data; 2485bcbbb24aSTao Ma if (le32_to_cpu(rb->rf_flags) & OCFS2_REFCOUNT_TREE_FL) { 2486bcbbb24aSTao Ma struct ocfs2_extent_tree et; 2487bcbbb24aSTao Ma 2488bcbbb24aSTao Ma ocfs2_init_refcount_extent_tree(&et, ci, ref_root_bh); 2489bcbbb24aSTao Ma *meta_add += ocfs2_extend_meta_needed(et.et_root_el); 2490bcbbb24aSTao Ma *credits += ocfs2_calc_extend_credits(sb, 249106f9da6eSGoldwyn Rodrigues et.et_root_el); 2492bcbbb24aSTao Ma } else { 2493bcbbb24aSTao Ma *credits += OCFS2_EXPAND_REFCOUNT_TREE_CREDITS; 2494bcbbb24aSTao Ma *meta_add += 1; 2495bcbbb24aSTao Ma } 2496bcbbb24aSTao Ma 2497bcbbb24aSTao Ma out: 2498198aac28STao Ma 2499198aac28STao Ma trace_ocfs2_calc_refcount_meta_credits( 2500198aac28STao Ma (unsigned long long)start_cpos, clusters, 2501198aac28STao Ma *meta_add, *credits); 2502bcbbb24aSTao Ma brelse(ref_leaf_bh); 2503bcbbb24aSTao Ma brelse(prev_bh); 2504bcbbb24aSTao Ma return ret; 2505bcbbb24aSTao Ma } 2506bcbbb24aSTao Ma 2507bcbbb24aSTao Ma /* 2508bcbbb24aSTao Ma * For refcount tree, we will decrease some contiguous clusters 2509bcbbb24aSTao Ma * refcount count, so just go through it to see how many blocks 2510bcbbb24aSTao Ma * we gonna touch and whether we need to create new blocks. 2511bcbbb24aSTao Ma * 2512bcbbb24aSTao Ma * Normally the refcount blocks store these refcount should be 2513af901ca1SAndré Goddard Rosa * contiguous also, so that we can get the number easily. 251478f94673STristan Ye * We will at most add split 2 refcount records and 2 more 251578f94673STristan Ye * refcount blocks, so just check it in a rough way. 2516bcbbb24aSTao Ma * 2517bcbbb24aSTao Ma * Caller must hold refcount tree lock. 2518bcbbb24aSTao Ma */ 2519bcbbb24aSTao Ma int ocfs2_prepare_refcount_change_for_del(struct inode *inode, 252078f94673STristan Ye u64 refcount_loc, 2521bcbbb24aSTao Ma u64 phys_blkno, 2522bcbbb24aSTao Ma u32 clusters, 2523bcbbb24aSTao Ma int *credits, 252478f94673STristan Ye int *ref_blocks) 2525bcbbb24aSTao Ma { 252678f94673STristan Ye int ret; 2527bcbbb24aSTao Ma struct buffer_head *ref_root_bh = NULL; 2528bcbbb24aSTao Ma struct ocfs2_refcount_tree *tree; 2529bcbbb24aSTao Ma u64 start_cpos = ocfs2_blocks_to_clusters(inode->i_sb, phys_blkno); 2530bcbbb24aSTao Ma 2531bcbbb24aSTao Ma if (!ocfs2_refcount_tree(OCFS2_SB(inode->i_sb))) { 25327ecef14aSJoe Perches ret = ocfs2_error(inode->i_sb, "Inode %lu want to use refcount tree, but the feature bit is not set in the super block\n", 25337ecef14aSJoe Perches inode->i_ino); 2534bcbbb24aSTao Ma goto out; 2535bcbbb24aSTao Ma } 2536bcbbb24aSTao Ma 253784e40080SDarrick J. Wong BUG_ON(!ocfs2_is_refcount_inode(inode)); 2538bcbbb24aSTao Ma 2539bcbbb24aSTao Ma ret = ocfs2_get_refcount_tree(OCFS2_SB(inode->i_sb), 254078f94673STristan Ye refcount_loc, &tree); 2541bcbbb24aSTao Ma if (ret) { 2542bcbbb24aSTao Ma mlog_errno(ret); 2543bcbbb24aSTao Ma goto out; 2544bcbbb24aSTao Ma } 2545bcbbb24aSTao Ma 254678f94673STristan Ye ret = ocfs2_read_refcount_block(&tree->rf_ci, refcount_loc, 2547bcbbb24aSTao Ma &ref_root_bh); 2548bcbbb24aSTao Ma if (ret) { 2549bcbbb24aSTao Ma mlog_errno(ret); 2550bcbbb24aSTao Ma goto out; 2551bcbbb24aSTao Ma } 2552bcbbb24aSTao Ma 2553bcbbb24aSTao Ma ret = ocfs2_calc_refcount_meta_credits(inode->i_sb, 2554bcbbb24aSTao Ma &tree->rf_ci, 2555bcbbb24aSTao Ma ref_root_bh, 2556bcbbb24aSTao Ma start_cpos, clusters, 255778f94673STristan Ye ref_blocks, credits); 2558bcbbb24aSTao Ma if (ret) { 2559bcbbb24aSTao Ma mlog_errno(ret); 2560bcbbb24aSTao Ma goto out; 2561bcbbb24aSTao Ma } 2562bcbbb24aSTao Ma 2563198aac28STao Ma trace_ocfs2_prepare_refcount_change_for_del(*ref_blocks, *credits); 2564bcbbb24aSTao Ma 2565bcbbb24aSTao Ma out: 2566bcbbb24aSTao Ma brelse(ref_root_bh); 2567bcbbb24aSTao Ma return ret; 2568bcbbb24aSTao Ma } 25696f70fa51STao Ma 25706f70fa51STao Ma #define MAX_CONTIG_BYTES 1048576 25716f70fa51STao Ma 25726f70fa51STao Ma static inline unsigned int ocfs2_cow_contig_clusters(struct super_block *sb) 25736f70fa51STao Ma { 25746f70fa51STao Ma return ocfs2_clusters_for_bytes(sb, MAX_CONTIG_BYTES); 25756f70fa51STao Ma } 25766f70fa51STao Ma 25776f70fa51STao Ma static inline unsigned int ocfs2_cow_contig_mask(struct super_block *sb) 25786f70fa51STao Ma { 25796f70fa51STao Ma return ~(ocfs2_cow_contig_clusters(sb) - 1); 25806f70fa51STao Ma } 25816f70fa51STao Ma 25826f70fa51STao Ma /* 25836f70fa51STao Ma * Given an extent that starts at 'start' and an I/O that starts at 'cpos', 25846f70fa51STao Ma * find an offset (start + (n * contig_clusters)) that is closest to cpos 25856f70fa51STao Ma * while still being less than or equal to it. 25866f70fa51STao Ma * 25876f70fa51STao Ma * The goal is to break the extent at a multiple of contig_clusters. 25886f70fa51STao Ma */ 25896f70fa51STao Ma static inline unsigned int ocfs2_cow_align_start(struct super_block *sb, 25906f70fa51STao Ma unsigned int start, 25916f70fa51STao Ma unsigned int cpos) 25926f70fa51STao Ma { 25936f70fa51STao Ma BUG_ON(start > cpos); 25946f70fa51STao Ma 25956f70fa51STao Ma return start + ((cpos - start) & ocfs2_cow_contig_mask(sb)); 25966f70fa51STao Ma } 25976f70fa51STao Ma 25986f70fa51STao Ma /* 25996f70fa51STao Ma * Given a cluster count of len, pad it out so that it is a multiple 26006f70fa51STao Ma * of contig_clusters. 26016f70fa51STao Ma */ 26026f70fa51STao Ma static inline unsigned int ocfs2_cow_align_length(struct super_block *sb, 26036f70fa51STao Ma unsigned int len) 26046f70fa51STao Ma { 26056f70fa51STao Ma unsigned int padded = 26066f70fa51STao Ma (len + (ocfs2_cow_contig_clusters(sb) - 1)) & 26076f70fa51STao Ma ocfs2_cow_contig_mask(sb); 26086f70fa51STao Ma 26096f70fa51STao Ma /* Did we wrap? */ 26106f70fa51STao Ma if (padded < len) 26116f70fa51STao Ma padded = UINT_MAX; 26126f70fa51STao Ma 26136f70fa51STao Ma return padded; 26146f70fa51STao Ma } 26156f70fa51STao Ma 26166f70fa51STao Ma /* 26176f70fa51STao Ma * Calculate out the start and number of virtual clusters we need to to CoW. 26186f70fa51STao Ma * 26196f70fa51STao Ma * cpos is vitual start cluster position we want to do CoW in a 26206f70fa51STao Ma * file and write_len is the cluster length. 262137f8a2bfSTao Ma * max_cpos is the place where we want to stop CoW intentionally. 26226f70fa51STao Ma * 26236f70fa51STao Ma * Normal we will start CoW from the beginning of extent record cotaining cpos. 26246f70fa51STao Ma * We try to break up extents on boundaries of MAX_CONTIG_BYTES so that we 26256f70fa51STao Ma * get good I/O from the resulting extent tree. 26266f70fa51STao Ma */ 26276f70fa51STao Ma static int ocfs2_refcount_cal_cow_clusters(struct inode *inode, 2628913580b4STao Ma struct ocfs2_extent_list *el, 26296f70fa51STao Ma u32 cpos, 26306f70fa51STao Ma u32 write_len, 263137f8a2bfSTao Ma u32 max_cpos, 26326f70fa51STao Ma u32 *cow_start, 26336f70fa51STao Ma u32 *cow_len) 26346f70fa51STao Ma { 26356f70fa51STao Ma int ret = 0; 26366f70fa51STao Ma int tree_height = le16_to_cpu(el->l_tree_depth), i; 26376f70fa51STao Ma struct buffer_head *eb_bh = NULL; 26386f70fa51STao Ma struct ocfs2_extent_block *eb = NULL; 26396f70fa51STao Ma struct ocfs2_extent_rec *rec; 26406f70fa51STao Ma unsigned int want_clusters, rec_end = 0; 26416f70fa51STao Ma int contig_clusters = ocfs2_cow_contig_clusters(inode->i_sb); 26426f70fa51STao Ma int leaf_clusters; 26436f70fa51STao Ma 264437f8a2bfSTao Ma BUG_ON(cpos + write_len > max_cpos); 264537f8a2bfSTao Ma 26466f70fa51STao Ma if (tree_height > 0) { 26476f70fa51STao Ma ret = ocfs2_find_leaf(INODE_CACHE(inode), el, cpos, &eb_bh); 26486f70fa51STao Ma if (ret) { 26496f70fa51STao Ma mlog_errno(ret); 26506f70fa51STao Ma goto out; 26516f70fa51STao Ma } 26526f70fa51STao Ma 26536f70fa51STao Ma eb = (struct ocfs2_extent_block *) eb_bh->b_data; 26546f70fa51STao Ma el = &eb->h_list; 26556f70fa51STao Ma 26566f70fa51STao Ma if (el->l_tree_depth) { 265717a5b9abSGoldwyn Rodrigues ret = ocfs2_error(inode->i_sb, 26587ecef14aSJoe Perches "Inode %lu has non zero tree depth in leaf block %llu\n", 26597ecef14aSJoe Perches inode->i_ino, 26606f70fa51STao Ma (unsigned long long)eb_bh->b_blocknr); 26616f70fa51STao Ma goto out; 26626f70fa51STao Ma } 26636f70fa51STao Ma } 26646f70fa51STao Ma 26656f70fa51STao Ma *cow_len = 0; 26666f70fa51STao Ma for (i = 0; i < le16_to_cpu(el->l_next_free_rec); i++) { 26676f70fa51STao Ma rec = &el->l_recs[i]; 26686f70fa51STao Ma 26696f70fa51STao Ma if (ocfs2_is_empty_extent(rec)) { 26706f70fa51STao Ma mlog_bug_on_msg(i != 0, "Inode %lu has empty record in " 26716f70fa51STao Ma "index %d\n", inode->i_ino, i); 26726f70fa51STao Ma continue; 26736f70fa51STao Ma } 26746f70fa51STao Ma 26756f70fa51STao Ma if (le32_to_cpu(rec->e_cpos) + 26766f70fa51STao Ma le16_to_cpu(rec->e_leaf_clusters) <= cpos) 26776f70fa51STao Ma continue; 26786f70fa51STao Ma 26796f70fa51STao Ma if (*cow_len == 0) { 26806f70fa51STao Ma /* 26816f70fa51STao Ma * We should find a refcounted record in the 26826f70fa51STao Ma * first pass. 26836f70fa51STao Ma */ 26846f70fa51STao Ma BUG_ON(!(rec->e_flags & OCFS2_EXT_REFCOUNTED)); 26856f70fa51STao Ma *cow_start = le32_to_cpu(rec->e_cpos); 26866f70fa51STao Ma } 26876f70fa51STao Ma 26886f70fa51STao Ma /* 268937f8a2bfSTao Ma * If we encounter a hole, a non-refcounted record or 269037f8a2bfSTao Ma * pass the max_cpos, stop the search. 26916f70fa51STao Ma */ 26926f70fa51STao Ma if ((!(rec->e_flags & OCFS2_EXT_REFCOUNTED)) || 269337f8a2bfSTao Ma (*cow_len && rec_end != le32_to_cpu(rec->e_cpos)) || 269437f8a2bfSTao Ma (max_cpos <= le32_to_cpu(rec->e_cpos))) 26956f70fa51STao Ma break; 26966f70fa51STao Ma 26976f70fa51STao Ma leaf_clusters = le16_to_cpu(rec->e_leaf_clusters); 26986f70fa51STao Ma rec_end = le32_to_cpu(rec->e_cpos) + leaf_clusters; 269937f8a2bfSTao Ma if (rec_end > max_cpos) { 270037f8a2bfSTao Ma rec_end = max_cpos; 270137f8a2bfSTao Ma leaf_clusters = rec_end - le32_to_cpu(rec->e_cpos); 270237f8a2bfSTao Ma } 27036f70fa51STao Ma 27046f70fa51STao Ma /* 27056f70fa51STao Ma * How many clusters do we actually need from 27066f70fa51STao Ma * this extent? First we see how many we actually 27076f70fa51STao Ma * need to complete the write. If that's smaller 27086f70fa51STao Ma * than contig_clusters, we try for contig_clusters. 27096f70fa51STao Ma */ 27106f70fa51STao Ma if (!*cow_len) 27116f70fa51STao Ma want_clusters = write_len; 27126f70fa51STao Ma else 27136f70fa51STao Ma want_clusters = (cpos + write_len) - 27146f70fa51STao Ma (*cow_start + *cow_len); 27156f70fa51STao Ma if (want_clusters < contig_clusters) 27166f70fa51STao Ma want_clusters = contig_clusters; 27176f70fa51STao Ma 27186f70fa51STao Ma /* 27196f70fa51STao Ma * If the write does not cover the whole extent, we 27206f70fa51STao Ma * need to calculate how we're going to split the extent. 27216f70fa51STao Ma * We try to do it on contig_clusters boundaries. 27226f70fa51STao Ma * 27236f70fa51STao Ma * Any extent smaller than contig_clusters will be 27246f70fa51STao Ma * CoWed in its entirety. 27256f70fa51STao Ma */ 27266f70fa51STao Ma if (leaf_clusters <= contig_clusters) 27276f70fa51STao Ma *cow_len += leaf_clusters; 27286f70fa51STao Ma else if (*cow_len || (*cow_start == cpos)) { 27296f70fa51STao Ma /* 27306f70fa51STao Ma * This extent needs to be CoW'd from its 27316f70fa51STao Ma * beginning, so all we have to do is compute 27326f70fa51STao Ma * how many clusters to grab. We align 27336f70fa51STao Ma * want_clusters to the edge of contig_clusters 27346f70fa51STao Ma * to get better I/O. 27356f70fa51STao Ma */ 27366f70fa51STao Ma want_clusters = ocfs2_cow_align_length(inode->i_sb, 27376f70fa51STao Ma want_clusters); 27386f70fa51STao Ma 27396f70fa51STao Ma if (leaf_clusters < want_clusters) 27406f70fa51STao Ma *cow_len += leaf_clusters; 27416f70fa51STao Ma else 27426f70fa51STao Ma *cow_len += want_clusters; 27436f70fa51STao Ma } else if ((*cow_start + contig_clusters) >= 27446f70fa51STao Ma (cpos + write_len)) { 27456f70fa51STao Ma /* 27466f70fa51STao Ma * Breaking off contig_clusters at the front 27476f70fa51STao Ma * of the extent will cover our write. That's 27486f70fa51STao Ma * easy. 27496f70fa51STao Ma */ 27506f70fa51STao Ma *cow_len = contig_clusters; 27516f70fa51STao Ma } else if ((rec_end - cpos) <= contig_clusters) { 27526f70fa51STao Ma /* 27536f70fa51STao Ma * Breaking off contig_clusters at the tail of 27546f70fa51STao Ma * this extent will cover cpos. 27556f70fa51STao Ma */ 27566f70fa51STao Ma *cow_start = rec_end - contig_clusters; 27576f70fa51STao Ma *cow_len = contig_clusters; 27586f70fa51STao Ma } else if ((rec_end - cpos) <= want_clusters) { 27596f70fa51STao Ma /* 27606f70fa51STao Ma * While we can't fit the entire write in this 27616f70fa51STao Ma * extent, we know that the write goes from cpos 27626f70fa51STao Ma * to the end of the extent. Break that off. 27636f70fa51STao Ma * We try to break it at some multiple of 27646f70fa51STao Ma * contig_clusters from the front of the extent. 27656f70fa51STao Ma * Failing that (ie, cpos is within 27666f70fa51STao Ma * contig_clusters of the front), we'll CoW the 27676f70fa51STao Ma * entire extent. 27686f70fa51STao Ma */ 27696f70fa51STao Ma *cow_start = ocfs2_cow_align_start(inode->i_sb, 27706f70fa51STao Ma *cow_start, cpos); 27716f70fa51STao Ma *cow_len = rec_end - *cow_start; 27726f70fa51STao Ma } else { 27736f70fa51STao Ma /* 27746f70fa51STao Ma * Ok, the entire write lives in the middle of 27756f70fa51STao Ma * this extent. Let's try to slice the extent up 27766f70fa51STao Ma * nicely. Optimally, our CoW region starts at 27776f70fa51STao Ma * m*contig_clusters from the beginning of the 27786f70fa51STao Ma * extent and goes for n*contig_clusters, 27796f70fa51STao Ma * covering the entire write. 27806f70fa51STao Ma */ 27816f70fa51STao Ma *cow_start = ocfs2_cow_align_start(inode->i_sb, 27826f70fa51STao Ma *cow_start, cpos); 27836f70fa51STao Ma 27846f70fa51STao Ma want_clusters = (cpos + write_len) - *cow_start; 27856f70fa51STao Ma want_clusters = ocfs2_cow_align_length(inode->i_sb, 27866f70fa51STao Ma want_clusters); 27876f70fa51STao Ma if (*cow_start + want_clusters <= rec_end) 27886f70fa51STao Ma *cow_len = want_clusters; 27896f70fa51STao Ma else 27906f70fa51STao Ma *cow_len = rec_end - *cow_start; 27916f70fa51STao Ma } 27926f70fa51STao Ma 27936f70fa51STao Ma /* Have we covered our entire write yet? */ 27946f70fa51STao Ma if ((*cow_start + *cow_len) >= (cpos + write_len)) 27956f70fa51STao Ma break; 27966f70fa51STao Ma 27976f70fa51STao Ma /* 27986f70fa51STao Ma * If we reach the end of the extent block and don't get enough 27996f70fa51STao Ma * clusters, continue with the next extent block if possible. 28006f70fa51STao Ma */ 28016f70fa51STao Ma if (i + 1 == le16_to_cpu(el->l_next_free_rec) && 28026f70fa51STao Ma eb && eb->h_next_leaf_blk) { 28036f70fa51STao Ma brelse(eb_bh); 28046f70fa51STao Ma eb_bh = NULL; 28056f70fa51STao Ma 28066f70fa51STao Ma ret = ocfs2_read_extent_block(INODE_CACHE(inode), 28076f70fa51STao Ma le64_to_cpu(eb->h_next_leaf_blk), 28086f70fa51STao Ma &eb_bh); 28096f70fa51STao Ma if (ret) { 28106f70fa51STao Ma mlog_errno(ret); 28116f70fa51STao Ma goto out; 28126f70fa51STao Ma } 28136f70fa51STao Ma 28146f70fa51STao Ma eb = (struct ocfs2_extent_block *) eb_bh->b_data; 28156f70fa51STao Ma el = &eb->h_list; 28166f70fa51STao Ma i = -1; 28176f70fa51STao Ma } 28186f70fa51STao Ma } 28196f70fa51STao Ma 28206f70fa51STao Ma out: 28216f70fa51STao Ma brelse(eb_bh); 28226f70fa51STao Ma return ret; 28236f70fa51STao Ma } 28246f70fa51STao Ma 28256f70fa51STao Ma /* 28266f70fa51STao Ma * Prepare meta_ac, data_ac and calculate credits when we want to add some 28276f70fa51STao Ma * num_clusters in data_tree "et" and change the refcount for the old 28286f70fa51STao Ma * clusters(starting form p_cluster) in the refcount tree. 28296f70fa51STao Ma * 28306f70fa51STao Ma * Note: 28316f70fa51STao Ma * 1. since we may split the old tree, so we at most will need num_clusters + 2 28326f70fa51STao Ma * more new leaf records. 28336f70fa51STao Ma * 2. In some case, we may not need to reserve new clusters(e.g, reflink), so 28346f70fa51STao Ma * just give data_ac = NULL. 28356f70fa51STao Ma */ 28366f70fa51STao Ma static int ocfs2_lock_refcount_allocators(struct super_block *sb, 28376f70fa51STao Ma u32 p_cluster, u32 num_clusters, 28386f70fa51STao Ma struct ocfs2_extent_tree *et, 28396f70fa51STao Ma struct ocfs2_caching_info *ref_ci, 28406f70fa51STao Ma struct buffer_head *ref_root_bh, 28416f70fa51STao Ma struct ocfs2_alloc_context **meta_ac, 28426f70fa51STao Ma struct ocfs2_alloc_context **data_ac, 28436f70fa51STao Ma int *credits) 28446f70fa51STao Ma { 28456f70fa51STao Ma int ret = 0, meta_add = 0; 2846964f14a0SJun Piao int num_free_extents = ocfs2_num_free_extents(et); 28476f70fa51STao Ma 28486f70fa51STao Ma if (num_free_extents < 0) { 28496f70fa51STao Ma ret = num_free_extents; 28506f70fa51STao Ma mlog_errno(ret); 28516f70fa51STao Ma goto out; 28526f70fa51STao Ma } 28536f70fa51STao Ma 28546f70fa51STao Ma if (num_free_extents < num_clusters + 2) 28556f70fa51STao Ma meta_add = 28566f70fa51STao Ma ocfs2_extend_meta_needed(et->et_root_el); 28576f70fa51STao Ma 285806f9da6eSGoldwyn Rodrigues *credits += ocfs2_calc_extend_credits(sb, et->et_root_el); 28596f70fa51STao Ma 28606f70fa51STao Ma ret = ocfs2_calc_refcount_meta_credits(sb, ref_ci, ref_root_bh, 28616f70fa51STao Ma p_cluster, num_clusters, 28626f70fa51STao Ma &meta_add, credits); 28636f70fa51STao Ma if (ret) { 28646f70fa51STao Ma mlog_errno(ret); 28656f70fa51STao Ma goto out; 28666f70fa51STao Ma } 28676f70fa51STao Ma 2868198aac28STao Ma trace_ocfs2_lock_refcount_allocators(meta_add, *credits); 28696f70fa51STao Ma ret = ocfs2_reserve_new_metadata_blocks(OCFS2_SB(sb), meta_add, 28706f70fa51STao Ma meta_ac); 28716f70fa51STao Ma if (ret) { 28726f70fa51STao Ma mlog_errno(ret); 28736f70fa51STao Ma goto out; 28746f70fa51STao Ma } 28756f70fa51STao Ma 28766f70fa51STao Ma if (data_ac) { 28776f70fa51STao Ma ret = ocfs2_reserve_clusters(OCFS2_SB(sb), num_clusters, 28786f70fa51STao Ma data_ac); 28796f70fa51STao Ma if (ret) 28806f70fa51STao Ma mlog_errno(ret); 28816f70fa51STao Ma } 28826f70fa51STao Ma 28836f70fa51STao Ma out: 28846f70fa51STao Ma if (ret) { 28856f70fa51STao Ma if (*meta_ac) { 28866f70fa51STao Ma ocfs2_free_alloc_context(*meta_ac); 28876f70fa51STao Ma *meta_ac = NULL; 28886f70fa51STao Ma } 28896f70fa51STao Ma } 28906f70fa51STao Ma 28916f70fa51STao Ma return ret; 28926f70fa51STao Ma } 28936f70fa51STao Ma 28946f70fa51STao Ma static int ocfs2_clear_cow_buffer(handle_t *handle, struct buffer_head *bh) 28956f70fa51STao Ma { 28966f70fa51STao Ma BUG_ON(buffer_dirty(bh)); 28976f70fa51STao Ma 28986f70fa51STao Ma clear_buffer_mapped(bh); 28996f70fa51STao Ma 29006f70fa51STao Ma return 0; 29016f70fa51STao Ma } 29026f70fa51STao Ma 29033e19a25eSTristan Ye int ocfs2_duplicate_clusters_by_page(handle_t *handle, 2904c7dd3392STiger Yang struct inode *inode, 29056f70fa51STao Ma u32 cpos, u32 old_cluster, 29066f70fa51STao Ma u32 new_cluster, u32 new_len) 29076f70fa51STao Ma { 29086f70fa51STao Ma int ret = 0, partial; 2909c7dd3392STiger Yang struct super_block *sb = inode->i_sb; 29106f70fa51STao Ma u64 new_block = ocfs2_clusters_to_blocks(sb, new_cluster); 29116f70fa51STao Ma struct page *page; 29126f70fa51STao Ma pgoff_t page_index; 2913262d8a87SJoseph Qi unsigned int from, to; 29146f70fa51STao Ma loff_t offset, end, map_end; 29153e19a25eSTristan Ye struct address_space *mapping = inode->i_mapping; 29166f70fa51STao Ma 2917198aac28STao Ma trace_ocfs2_duplicate_clusters_by_page(cpos, old_cluster, 2918198aac28STao Ma new_cluster, new_len); 29196f70fa51STao Ma 29206f70fa51STao Ma offset = ((loff_t)cpos) << OCFS2_SB(sb)->s_clustersize_bits; 29216f70fa51STao Ma end = offset + (new_len << OCFS2_SB(sb)->s_clustersize_bits); 2922f5e27b6dSTao Ma /* 2923f5e27b6dSTao Ma * We only duplicate pages until we reach the page contains i_size - 1. 2924f5e27b6dSTao Ma * So trim 'end' to i_size. 2925f5e27b6dSTao Ma */ 29263e19a25eSTristan Ye if (end > i_size_read(inode)) 29273e19a25eSTristan Ye end = i_size_read(inode); 29286f70fa51STao Ma 29296f70fa51STao Ma while (offset < end) { 293009cbfeafSKirill A. Shutemov page_index = offset >> PAGE_SHIFT; 293109cbfeafSKirill A. Shutemov map_end = ((loff_t)page_index + 1) << PAGE_SHIFT; 29326f70fa51STao Ma if (map_end > end) 29336f70fa51STao Ma map_end = end; 29346f70fa51STao Ma 29356f70fa51STao Ma /* from, to is the offset within the page. */ 293609cbfeafSKirill A. Shutemov from = offset & (PAGE_SIZE - 1); 293709cbfeafSKirill A. Shutemov to = PAGE_SIZE; 293809cbfeafSKirill A. Shutemov if (map_end & (PAGE_SIZE - 1)) 293909cbfeafSKirill A. Shutemov to = map_end & (PAGE_SIZE - 1); 29406f70fa51STao Ma 294169eb7765SLarry Chen retry: 29429b4c0ff3SJan Kara page = find_or_create_page(mapping, page_index, GFP_NOFS); 294362c61046SGu Zheng if (!page) { 294462c61046SGu Zheng ret = -ENOMEM; 294562c61046SGu Zheng mlog_errno(ret); 294662c61046SGu Zheng break; 294762c61046SGu Zheng } 29486f70fa51STao Ma 29490a1ea437STao Ma /* 295069eb7765SLarry Chen * In case PAGE_SIZE <= CLUSTER_SIZE, we do not expect a dirty 295169eb7765SLarry Chen * page, so write it back. 29520a1ea437STao Ma */ 295369eb7765SLarry Chen if (PAGE_SIZE <= OCFS2_SB(sb)->s_clustersize) { 295469eb7765SLarry Chen if (PageDirty(page)) { 295569eb7765SLarry Chen /* 295669eb7765SLarry Chen * write_on_page will unlock the page on return 295769eb7765SLarry Chen */ 295869eb7765SLarry Chen ret = write_one_page(page); 295969eb7765SLarry Chen goto retry; 296069eb7765SLarry Chen } 296169eb7765SLarry Chen } 29626f70fa51STao Ma 29636f70fa51STao Ma if (!PageUptodate(page)) { 29646f70fa51STao Ma ret = block_read_full_page(page, ocfs2_get_block); 29656f70fa51STao Ma if (ret) { 29666f70fa51STao Ma mlog_errno(ret); 29676f70fa51STao Ma goto unlock; 29686f70fa51STao Ma } 29696f70fa51STao Ma lock_page(page); 29706f70fa51STao Ma } 29716f70fa51STao Ma 29726f70fa51STao Ma if (page_has_buffers(page)) { 29736f70fa51STao Ma ret = walk_page_buffers(handle, page_buffers(page), 29746f70fa51STao Ma from, to, &partial, 29756f70fa51STao Ma ocfs2_clear_cow_buffer); 29766f70fa51STao Ma if (ret) { 29776f70fa51STao Ma mlog_errno(ret); 29786f70fa51STao Ma goto unlock; 29796f70fa51STao Ma } 29806f70fa51STao Ma } 29816f70fa51STao Ma 2982c7dd3392STiger Yang ocfs2_map_and_dirty_page(inode, 2983c7dd3392STiger Yang handle, from, to, 29846f70fa51STao Ma page, 0, &new_block); 29856f70fa51STao Ma mark_page_accessed(page); 29866f70fa51STao Ma unlock: 29876f70fa51STao Ma unlock_page(page); 298809cbfeafSKirill A. Shutemov put_page(page); 29896f70fa51STao Ma page = NULL; 29906f70fa51STao Ma offset = map_end; 29916f70fa51STao Ma if (ret) 29926f70fa51STao Ma break; 29936f70fa51STao Ma } 29946f70fa51STao Ma 29956f70fa51STao Ma return ret; 29966f70fa51STao Ma } 29976f70fa51STao Ma 29983e19a25eSTristan Ye int ocfs2_duplicate_clusters_by_jbd(handle_t *handle, 2999c7dd3392STiger Yang struct inode *inode, 3000492a8a33STao Ma u32 cpos, u32 old_cluster, 3001492a8a33STao Ma u32 new_cluster, u32 new_len) 3002492a8a33STao Ma { 3003492a8a33STao Ma int ret = 0; 30043e19a25eSTristan Ye struct super_block *sb = inode->i_sb; 30053e19a25eSTristan Ye struct ocfs2_caching_info *ci = INODE_CACHE(inode); 3006492a8a33STao Ma int i, blocks = ocfs2_clusters_to_blocks(sb, new_len); 3007492a8a33STao Ma u64 old_block = ocfs2_clusters_to_blocks(sb, old_cluster); 3008492a8a33STao Ma u64 new_block = ocfs2_clusters_to_blocks(sb, new_cluster); 3009492a8a33STao Ma struct ocfs2_super *osb = OCFS2_SB(sb); 3010492a8a33STao Ma struct buffer_head *old_bh = NULL; 3011492a8a33STao Ma struct buffer_head *new_bh = NULL; 3012492a8a33STao Ma 3013198aac28STao Ma trace_ocfs2_duplicate_clusters_by_page(cpos, old_cluster, 3014492a8a33STao Ma new_cluster, new_len); 3015492a8a33STao Ma 3016492a8a33STao Ma for (i = 0; i < blocks; i++, old_block++, new_block++) { 3017492a8a33STao Ma new_bh = sb_getblk(osb->sb, new_block); 3018492a8a33STao Ma if (new_bh == NULL) { 30197391a294SRui Xiang ret = -ENOMEM; 3020492a8a33STao Ma mlog_errno(ret); 3021492a8a33STao Ma break; 3022492a8a33STao Ma } 3023492a8a33STao Ma 3024492a8a33STao Ma ocfs2_set_new_buffer_uptodate(ci, new_bh); 3025492a8a33STao Ma 3026492a8a33STao Ma ret = ocfs2_read_block(ci, old_block, &old_bh, NULL); 3027492a8a33STao Ma if (ret) { 3028492a8a33STao Ma mlog_errno(ret); 3029492a8a33STao Ma break; 3030492a8a33STao Ma } 3031492a8a33STao Ma 3032492a8a33STao Ma ret = ocfs2_journal_access(handle, ci, new_bh, 3033492a8a33STao Ma OCFS2_JOURNAL_ACCESS_CREATE); 3034492a8a33STao Ma if (ret) { 3035492a8a33STao Ma mlog_errno(ret); 3036492a8a33STao Ma break; 3037492a8a33STao Ma } 3038492a8a33STao Ma 3039492a8a33STao Ma memcpy(new_bh->b_data, old_bh->b_data, sb->s_blocksize); 3040ec20cec7SJoel Becker ocfs2_journal_dirty(handle, new_bh); 3041492a8a33STao Ma 3042492a8a33STao Ma brelse(new_bh); 3043492a8a33STao Ma brelse(old_bh); 3044492a8a33STao Ma new_bh = NULL; 3045492a8a33STao Ma old_bh = NULL; 3046492a8a33STao Ma } 3047492a8a33STao Ma 3048492a8a33STao Ma brelse(new_bh); 3049492a8a33STao Ma brelse(old_bh); 3050492a8a33STao Ma return ret; 3051492a8a33STao Ma } 3052492a8a33STao Ma 30536f70fa51STao Ma static int ocfs2_clear_ext_refcount(handle_t *handle, 30546f70fa51STao Ma struct ocfs2_extent_tree *et, 30556f70fa51STao Ma u32 cpos, u32 p_cluster, u32 len, 30566f70fa51STao Ma unsigned int ext_flags, 30576f70fa51STao Ma struct ocfs2_alloc_context *meta_ac, 30586f70fa51STao Ma struct ocfs2_cached_dealloc_ctxt *dealloc) 30596f70fa51STao Ma { 30606f70fa51STao Ma int ret, index; 30616f70fa51STao Ma struct ocfs2_extent_rec replace_rec; 30626f70fa51STao Ma struct ocfs2_path *path = NULL; 30636f70fa51STao Ma struct ocfs2_extent_list *el; 30646f70fa51STao Ma struct super_block *sb = ocfs2_metadata_cache_get_super(et->et_ci); 30656f70fa51STao Ma u64 ino = ocfs2_metadata_cache_owner(et->et_ci); 30666f70fa51STao Ma 3067198aac28STao Ma trace_ocfs2_clear_ext_refcount((unsigned long long)ino, 3068198aac28STao Ma cpos, len, p_cluster, ext_flags); 30696f70fa51STao Ma 30706f70fa51STao Ma memset(&replace_rec, 0, sizeof(replace_rec)); 30716f70fa51STao Ma replace_rec.e_cpos = cpu_to_le32(cpos); 30726f70fa51STao Ma replace_rec.e_leaf_clusters = cpu_to_le16(len); 30736f70fa51STao Ma replace_rec.e_blkno = cpu_to_le64(ocfs2_clusters_to_blocks(sb, 30746f70fa51STao Ma p_cluster)); 30756f70fa51STao Ma replace_rec.e_flags = ext_flags; 30766f70fa51STao Ma replace_rec.e_flags &= ~OCFS2_EXT_REFCOUNTED; 30776f70fa51STao Ma 30786f70fa51STao Ma path = ocfs2_new_path_from_et(et); 30796f70fa51STao Ma if (!path) { 30806f70fa51STao Ma ret = -ENOMEM; 30816f70fa51STao Ma mlog_errno(ret); 30826f70fa51STao Ma goto out; 30836f70fa51STao Ma } 30846f70fa51STao Ma 30856f70fa51STao Ma ret = ocfs2_find_path(et->et_ci, path, cpos); 30866f70fa51STao Ma if (ret) { 30876f70fa51STao Ma mlog_errno(ret); 30886f70fa51STao Ma goto out; 30896f70fa51STao Ma } 30906f70fa51STao Ma 30916f70fa51STao Ma el = path_leaf_el(path); 30926f70fa51STao Ma 30936f70fa51STao Ma index = ocfs2_search_extent_list(el, cpos); 3094981035b4SYingtai Xie if (index == -1) { 309517a5b9abSGoldwyn Rodrigues ret = ocfs2_error(sb, 30967ecef14aSJoe Perches "Inode %llu has an extent at cpos %u which can no longer be found\n", 30976f70fa51STao Ma (unsigned long long)ino, cpos); 30986f70fa51STao Ma goto out; 30996f70fa51STao Ma } 31006f70fa51STao Ma 31016f70fa51STao Ma ret = ocfs2_split_extent(handle, et, path, index, 31026f70fa51STao Ma &replace_rec, meta_ac, dealloc); 31036f70fa51STao Ma if (ret) 31046f70fa51STao Ma mlog_errno(ret); 31056f70fa51STao Ma 31066f70fa51STao Ma out: 31076f70fa51STao Ma ocfs2_free_path(path); 31086f70fa51STao Ma return ret; 31096f70fa51STao Ma } 31106f70fa51STao Ma 31116f70fa51STao Ma static int ocfs2_replace_clusters(handle_t *handle, 31126f70fa51STao Ma struct ocfs2_cow_context *context, 31136f70fa51STao Ma u32 cpos, u32 old, 31146f70fa51STao Ma u32 new, u32 len, 31156f70fa51STao Ma unsigned int ext_flags) 31166f70fa51STao Ma { 31176f70fa51STao Ma int ret; 3118913580b4STao Ma struct ocfs2_caching_info *ci = context->data_et.et_ci; 31196f70fa51STao Ma u64 ino = ocfs2_metadata_cache_owner(ci); 31206f70fa51STao Ma 3121198aac28STao Ma trace_ocfs2_replace_clusters((unsigned long long)ino, 3122198aac28STao Ma cpos, old, new, len, ext_flags); 31236f70fa51STao Ma 31246f70fa51STao Ma /*If the old clusters is unwritten, no need to duplicate. */ 31256f70fa51STao Ma if (!(ext_flags & OCFS2_EXT_UNWRITTEN)) { 3126c7dd3392STiger Yang ret = context->cow_duplicate_clusters(handle, context->inode, 31273e19a25eSTristan Ye cpos, old, new, len); 31286f70fa51STao Ma if (ret) { 31296f70fa51STao Ma mlog_errno(ret); 31306f70fa51STao Ma goto out; 31316f70fa51STao Ma } 31326f70fa51STao Ma } 31336f70fa51STao Ma 3134913580b4STao Ma ret = ocfs2_clear_ext_refcount(handle, &context->data_et, 31356f70fa51STao Ma cpos, new, len, ext_flags, 31366f70fa51STao Ma context->meta_ac, &context->dealloc); 31376f70fa51STao Ma if (ret) 31386f70fa51STao Ma mlog_errno(ret); 31396f70fa51STao Ma out: 31406f70fa51STao Ma return ret; 31416f70fa51STao Ma } 31426f70fa51STao Ma 31433e19a25eSTristan Ye int ocfs2_cow_sync_writeback(struct super_block *sb, 31443e19a25eSTristan Ye struct inode *inode, 31456f70fa51STao Ma u32 cpos, u32 num_clusters) 31466f70fa51STao Ma { 31476f70fa51STao Ma int ret = 0; 31486f70fa51STao Ma loff_t offset, end, map_end; 31496f70fa51STao Ma pgoff_t page_index; 31506f70fa51STao Ma struct page *page; 31516f70fa51STao Ma 31523e19a25eSTristan Ye if (ocfs2_should_order_data(inode)) 31536f70fa51STao Ma return 0; 31546f70fa51STao Ma 31556f70fa51STao Ma offset = ((loff_t)cpos) << OCFS2_SB(sb)->s_clustersize_bits; 31566f70fa51STao Ma end = offset + (num_clusters << OCFS2_SB(sb)->s_clustersize_bits); 31576f70fa51STao Ma 31583e19a25eSTristan Ye ret = filemap_fdatawrite_range(inode->i_mapping, 31596f70fa51STao Ma offset, end - 1); 31606f70fa51STao Ma if (ret < 0) { 31616f70fa51STao Ma mlog_errno(ret); 31626f70fa51STao Ma return ret; 31636f70fa51STao Ma } 31646f70fa51STao Ma 31656f70fa51STao Ma while (offset < end) { 316609cbfeafSKirill A. Shutemov page_index = offset >> PAGE_SHIFT; 316709cbfeafSKirill A. Shutemov map_end = ((loff_t)page_index + 1) << PAGE_SHIFT; 31686f70fa51STao Ma if (map_end > end) 31696f70fa51STao Ma map_end = end; 31706f70fa51STao Ma 31713e19a25eSTristan Ye page = find_or_create_page(inode->i_mapping, 31729b4c0ff3SJan Kara page_index, GFP_NOFS); 31736f70fa51STao Ma BUG_ON(!page); 31746f70fa51STao Ma 31756f70fa51STao Ma wait_on_page_writeback(page); 31766f70fa51STao Ma if (PageError(page)) { 31776f70fa51STao Ma ret = -EIO; 31786f70fa51STao Ma mlog_errno(ret); 31796f70fa51STao Ma } else 31806f70fa51STao Ma mark_page_accessed(page); 31816f70fa51STao Ma 31826f70fa51STao Ma unlock_page(page); 318309cbfeafSKirill A. Shutemov put_page(page); 31846f70fa51STao Ma page = NULL; 31856f70fa51STao Ma offset = map_end; 31866f70fa51STao Ma if (ret) 31876f70fa51STao Ma break; 31886f70fa51STao Ma } 31896f70fa51STao Ma 31906f70fa51STao Ma return ret; 31916f70fa51STao Ma } 31926f70fa51STao Ma 3193913580b4STao Ma static int ocfs2_di_get_clusters(struct ocfs2_cow_context *context, 3194913580b4STao Ma u32 v_cluster, u32 *p_cluster, 3195913580b4STao Ma u32 *num_clusters, 3196913580b4STao Ma unsigned int *extent_flags) 3197913580b4STao Ma { 3198913580b4STao Ma return ocfs2_get_clusters(context->inode, v_cluster, p_cluster, 3199913580b4STao Ma num_clusters, extent_flags); 3200913580b4STao Ma } 3201913580b4STao Ma 32026f70fa51STao Ma static int ocfs2_make_clusters_writable(struct super_block *sb, 32036f70fa51STao Ma struct ocfs2_cow_context *context, 32046f70fa51STao Ma u32 cpos, u32 p_cluster, 32056f70fa51STao Ma u32 num_clusters, unsigned int e_flags) 32066f70fa51STao Ma { 32076ae23c55STao Ma int ret, delete, index, credits = 0; 3208acf3bb00STristan Ye u32 new_bit, new_len, orig_num_clusters; 32096ae23c55STao Ma unsigned int set_len; 32106f70fa51STao Ma struct ocfs2_super *osb = OCFS2_SB(sb); 32116f70fa51STao Ma handle_t *handle; 32126ae23c55STao Ma struct buffer_head *ref_leaf_bh = NULL; 3213913580b4STao Ma struct ocfs2_caching_info *ref_ci = &context->ref_tree->rf_ci; 32146ae23c55STao Ma struct ocfs2_refcount_rec rec; 32156ae23c55STao Ma 3216198aac28STao Ma trace_ocfs2_make_clusters_writable(cpos, p_cluster, 3217198aac28STao Ma num_clusters, e_flags); 32186f70fa51STao Ma 32196f70fa51STao Ma ret = ocfs2_lock_refcount_allocators(sb, p_cluster, num_clusters, 3220913580b4STao Ma &context->data_et, 3221913580b4STao Ma ref_ci, 32226f70fa51STao Ma context->ref_root_bh, 32236f70fa51STao Ma &context->meta_ac, 32246f70fa51STao Ma &context->data_ac, &credits); 32256f70fa51STao Ma if (ret) { 32266f70fa51STao Ma mlog_errno(ret); 32276f70fa51STao Ma return ret; 32286f70fa51STao Ma } 32296f70fa51STao Ma 3230492a8a33STao Ma if (context->post_refcount) 3231492a8a33STao Ma credits += context->post_refcount->credits; 3232492a8a33STao Ma 3233492a8a33STao Ma credits += context->extra_credits; 32346f70fa51STao Ma handle = ocfs2_start_trans(osb, credits); 32356f70fa51STao Ma if (IS_ERR(handle)) { 32366f70fa51STao Ma ret = PTR_ERR(handle); 32376f70fa51STao Ma mlog_errno(ret); 32386f70fa51STao Ma goto out; 32396f70fa51STao Ma } 32406f70fa51STao Ma 3241acf3bb00STristan Ye orig_num_clusters = num_clusters; 3242acf3bb00STristan Ye 32436f70fa51STao Ma while (num_clusters) { 3244913580b4STao Ma ret = ocfs2_get_refcount_rec(ref_ci, context->ref_root_bh, 32456ae23c55STao Ma p_cluster, num_clusters, 32466ae23c55STao Ma &rec, &index, &ref_leaf_bh); 32476ae23c55STao Ma if (ret) { 32486ae23c55STao Ma mlog_errno(ret); 32496ae23c55STao Ma goto out_commit; 32506ae23c55STao Ma } 32516ae23c55STao Ma 32526ae23c55STao Ma BUG_ON(!rec.r_refcount); 32536ae23c55STao Ma set_len = min((u64)p_cluster + num_clusters, 32546ae23c55STao Ma le64_to_cpu(rec.r_cpos) + 32556ae23c55STao Ma le32_to_cpu(rec.r_clusters)) - p_cluster; 32566ae23c55STao Ma 32576ae23c55STao Ma /* 32586ae23c55STao Ma * There are many different situation here. 32596ae23c55STao Ma * 1. If refcount == 1, remove the flag and don't COW. 32606ae23c55STao Ma * 2. If refcount > 1, allocate clusters. 32616ae23c55STao Ma * Here we may not allocate r_len once at a time, so continue 32626ae23c55STao Ma * until we reach num_clusters. 32636ae23c55STao Ma */ 32646ae23c55STao Ma if (le32_to_cpu(rec.r_refcount) == 1) { 32656ae23c55STao Ma delete = 0; 3266913580b4STao Ma ret = ocfs2_clear_ext_refcount(handle, 3267913580b4STao Ma &context->data_et, 32686ae23c55STao Ma cpos, p_cluster, 32696ae23c55STao Ma set_len, e_flags, 32706ae23c55STao Ma context->meta_ac, 32716ae23c55STao Ma &context->dealloc); 32726ae23c55STao Ma if (ret) { 32736ae23c55STao Ma mlog_errno(ret); 32746ae23c55STao Ma goto out_commit; 32756ae23c55STao Ma } 32766ae23c55STao Ma } else { 32776ae23c55STao Ma delete = 1; 32786ae23c55STao Ma 32791ed9b777SJoel Becker ret = __ocfs2_claim_clusters(handle, 32806ae23c55STao Ma context->data_ac, 32816ae23c55STao Ma 1, set_len, 32826f70fa51STao Ma &new_bit, &new_len); 32836f70fa51STao Ma if (ret) { 32846f70fa51STao Ma mlog_errno(ret); 32856f70fa51STao Ma goto out_commit; 32866f70fa51STao Ma } 32876f70fa51STao Ma 32886f70fa51STao Ma ret = ocfs2_replace_clusters(handle, context, 32896f70fa51STao Ma cpos, p_cluster, new_bit, 32906f70fa51STao Ma new_len, e_flags); 32916f70fa51STao Ma if (ret) { 32926f70fa51STao Ma mlog_errno(ret); 32936f70fa51STao Ma goto out_commit; 32946f70fa51STao Ma } 32956ae23c55STao Ma set_len = new_len; 32966f70fa51STao Ma } 32976f70fa51STao Ma 3298913580b4STao Ma ret = __ocfs2_decrease_refcount(handle, ref_ci, 32996f70fa51STao Ma context->ref_root_bh, 33006ae23c55STao Ma p_cluster, set_len, 33016f70fa51STao Ma context->meta_ac, 33026ae23c55STao Ma &context->dealloc, delete); 33036f70fa51STao Ma if (ret) { 33046f70fa51STao Ma mlog_errno(ret); 33056f70fa51STao Ma goto out_commit; 33066f70fa51STao Ma } 33076f70fa51STao Ma 33086ae23c55STao Ma cpos += set_len; 33096ae23c55STao Ma p_cluster += set_len; 33106ae23c55STao Ma num_clusters -= set_len; 33116ae23c55STao Ma brelse(ref_leaf_bh); 33126ae23c55STao Ma ref_leaf_bh = NULL; 33136ae23c55STao Ma } 33146ae23c55STao Ma 3315492a8a33STao Ma /* handle any post_cow action. */ 3316492a8a33STao Ma if (context->post_refcount && context->post_refcount->func) { 3317492a8a33STao Ma ret = context->post_refcount->func(context->inode, handle, 3318492a8a33STao Ma context->post_refcount->para); 3319492a8a33STao Ma if (ret) { 3320492a8a33STao Ma mlog_errno(ret); 3321492a8a33STao Ma goto out_commit; 3322492a8a33STao Ma } 3323492a8a33STao Ma } 3324492a8a33STao Ma 33256f70fa51STao Ma /* 33266f70fa51STao Ma * Here we should write the new page out first if we are 33276f70fa51STao Ma * in write-back mode. 33286f70fa51STao Ma */ 3329492a8a33STao Ma if (context->get_clusters == ocfs2_di_get_clusters) { 33303e19a25eSTristan Ye ret = ocfs2_cow_sync_writeback(sb, context->inode, cpos, 3331acf3bb00STristan Ye orig_num_clusters); 33326f70fa51STao Ma if (ret) 33336f70fa51STao Ma mlog_errno(ret); 3334492a8a33STao Ma } 33356f70fa51STao Ma 33366f70fa51STao Ma out_commit: 33376f70fa51STao Ma ocfs2_commit_trans(osb, handle); 33386f70fa51STao Ma 33396f70fa51STao Ma out: 33406f70fa51STao Ma if (context->data_ac) { 33416f70fa51STao Ma ocfs2_free_alloc_context(context->data_ac); 33426f70fa51STao Ma context->data_ac = NULL; 33436f70fa51STao Ma } 33446f70fa51STao Ma if (context->meta_ac) { 33456f70fa51STao Ma ocfs2_free_alloc_context(context->meta_ac); 33466f70fa51STao Ma context->meta_ac = NULL; 33476f70fa51STao Ma } 33486ae23c55STao Ma brelse(ref_leaf_bh); 33496f70fa51STao Ma 33506f70fa51STao Ma return ret; 33516f70fa51STao Ma } 33526f70fa51STao Ma 3353913580b4STao Ma static int ocfs2_replace_cow(struct ocfs2_cow_context *context) 33546f70fa51STao Ma { 33556f70fa51STao Ma int ret = 0; 3356913580b4STao Ma struct inode *inode = context->inode; 3357913580b4STao Ma u32 cow_start = context->cow_start, cow_len = context->cow_len; 3358913580b4STao Ma u32 p_cluster, num_clusters; 33596f70fa51STao Ma unsigned int ext_flags; 33606f70fa51STao Ma struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); 33616f70fa51STao Ma 33621119d3c0Spiaojun if (!ocfs2_refcount_tree(osb)) { 33637ecef14aSJoe Perches return ocfs2_error(inode->i_sb, "Inode %lu want to use refcount tree, but the feature bit is not set in the super block\n", 33647ecef14aSJoe Perches inode->i_ino); 33656f70fa51STao Ma } 33666f70fa51STao Ma 33676f70fa51STao Ma ocfs2_init_dealloc_ctxt(&context->dealloc); 33686f70fa51STao Ma 33696f70fa51STao Ma while (cow_len) { 3370913580b4STao Ma ret = context->get_clusters(context, cow_start, &p_cluster, 33716f70fa51STao Ma &num_clusters, &ext_flags); 33726f70fa51STao Ma if (ret) { 33736f70fa51STao Ma mlog_errno(ret); 33746f70fa51STao Ma break; 33756f70fa51STao Ma } 33766f70fa51STao Ma 33776f70fa51STao Ma BUG_ON(!(ext_flags & OCFS2_EXT_REFCOUNTED)); 33786f70fa51STao Ma 33796f70fa51STao Ma if (cow_len < num_clusters) 33806f70fa51STao Ma num_clusters = cow_len; 33816f70fa51STao Ma 33826f70fa51STao Ma ret = ocfs2_make_clusters_writable(inode->i_sb, context, 33836f70fa51STao Ma cow_start, p_cluster, 33846f70fa51STao Ma num_clusters, ext_flags); 33856f70fa51STao Ma if (ret) { 33866f70fa51STao Ma mlog_errno(ret); 33876f70fa51STao Ma break; 33886f70fa51STao Ma } 33896f70fa51STao Ma 33906f70fa51STao Ma cow_len -= num_clusters; 33916f70fa51STao Ma cow_start += num_clusters; 33926f70fa51STao Ma } 33936f70fa51STao Ma 33946f70fa51STao Ma if (ocfs2_dealloc_has_cluster(&context->dealloc)) { 33956f70fa51STao Ma ocfs2_schedule_truncate_log_flush(osb, 1); 33966f70fa51STao Ma ocfs2_run_deallocs(osb, &context->dealloc); 33976f70fa51STao Ma } 33986f70fa51STao Ma 33996f70fa51STao Ma return ret; 34006f70fa51STao Ma } 34016f70fa51STao Ma 34026f70fa51STao Ma /* 340337f8a2bfSTao Ma * Starting at cpos, try to CoW write_len clusters. Don't CoW 340437f8a2bfSTao Ma * past max_cpos. This will stop when it runs into a hole or an 340537f8a2bfSTao Ma * unrefcounted extent. 34066f70fa51STao Ma */ 34076f70fa51STao Ma static int ocfs2_refcount_cow_hunk(struct inode *inode, 34086f70fa51STao Ma struct buffer_head *di_bh, 340937f8a2bfSTao Ma u32 cpos, u32 write_len, u32 max_cpos) 34106f70fa51STao Ma { 34116f70fa51STao Ma int ret; 34126f70fa51STao Ma u32 cow_start = 0, cow_len = 0; 34136f70fa51STao Ma struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); 34146f70fa51STao Ma struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; 34156f70fa51STao Ma struct buffer_head *ref_root_bh = NULL; 34166f70fa51STao Ma struct ocfs2_refcount_tree *ref_tree; 3417913580b4STao Ma struct ocfs2_cow_context *context = NULL; 34186f70fa51STao Ma 341984e40080SDarrick J. Wong BUG_ON(!ocfs2_is_refcount_inode(inode)); 34206f70fa51STao Ma 3421913580b4STao Ma ret = ocfs2_refcount_cal_cow_clusters(inode, &di->id2.i_list, 342237f8a2bfSTao Ma cpos, write_len, max_cpos, 34236f70fa51STao Ma &cow_start, &cow_len); 34246f70fa51STao Ma if (ret) { 34256f70fa51STao Ma mlog_errno(ret); 34266f70fa51STao Ma goto out; 34276f70fa51STao Ma } 342837f8a2bfSTao Ma 3429198aac28STao Ma trace_ocfs2_refcount_cow_hunk(OCFS2_I(inode)->ip_blkno, 3430198aac28STao Ma cpos, write_len, max_cpos, 3431198aac28STao Ma cow_start, cow_len); 34326f70fa51STao Ma 34336f70fa51STao Ma BUG_ON(cow_len == 0); 34346f70fa51STao Ma 3435913580b4STao Ma context = kzalloc(sizeof(struct ocfs2_cow_context), GFP_NOFS); 3436913580b4STao Ma if (!context) { 3437913580b4STao Ma ret = -ENOMEM; 3438913580b4STao Ma mlog_errno(ret); 3439913580b4STao Ma goto out; 3440913580b4STao Ma } 3441913580b4STao Ma 34426f70fa51STao Ma ret = ocfs2_lock_refcount_tree(osb, le64_to_cpu(di->i_refcount_loc), 34436f70fa51STao Ma 1, &ref_tree, &ref_root_bh); 34446f70fa51STao Ma if (ret) { 34456f70fa51STao Ma mlog_errno(ret); 34466f70fa51STao Ma goto out; 34476f70fa51STao Ma } 34486f70fa51STao Ma 3449913580b4STao Ma context->inode = inode; 3450913580b4STao Ma context->cow_start = cow_start; 3451913580b4STao Ma context->cow_len = cow_len; 3452913580b4STao Ma context->ref_tree = ref_tree; 3453913580b4STao Ma context->ref_root_bh = ref_root_bh; 3454913580b4STao Ma context->cow_duplicate_clusters = ocfs2_duplicate_clusters_by_page; 3455913580b4STao Ma context->get_clusters = ocfs2_di_get_clusters; 3456913580b4STao Ma 3457913580b4STao Ma ocfs2_init_dinode_extent_tree(&context->data_et, 3458913580b4STao Ma INODE_CACHE(inode), di_bh); 3459913580b4STao Ma 3460913580b4STao Ma ret = ocfs2_replace_cow(context); 34616f70fa51STao Ma if (ret) 34626f70fa51STao Ma mlog_errno(ret); 34636f70fa51STao Ma 3464913580b4STao Ma /* 3465913580b4STao Ma * truncate the extent map here since no matter whether we meet with 3466913580b4STao Ma * any error during the action, we shouldn't trust cached extent map 3467913580b4STao Ma * any more. 3468913580b4STao Ma */ 3469913580b4STao Ma ocfs2_extent_map_trunc(inode, cow_start); 3470913580b4STao Ma 34716f70fa51STao Ma ocfs2_unlock_refcount_tree(osb, ref_tree, 1); 34726f70fa51STao Ma brelse(ref_root_bh); 34736f70fa51STao Ma out: 3474913580b4STao Ma kfree(context); 34756f70fa51STao Ma return ret; 34766f70fa51STao Ma } 34776f70fa51STao Ma 34786f70fa51STao Ma /* 34796f70fa51STao Ma * CoW any and all clusters between cpos and cpos+write_len. 348037f8a2bfSTao Ma * Don't CoW past max_cpos. If this returns successfully, all 348137f8a2bfSTao Ma * clusters between cpos and cpos+write_len are safe to modify. 34826f70fa51STao Ma */ 34836f70fa51STao Ma int ocfs2_refcount_cow(struct inode *inode, 34846f70fa51STao Ma struct buffer_head *di_bh, 348537f8a2bfSTao Ma u32 cpos, u32 write_len, u32 max_cpos) 34866f70fa51STao Ma { 34876f70fa51STao Ma int ret = 0; 34886f70fa51STao Ma u32 p_cluster, num_clusters; 34896f70fa51STao Ma unsigned int ext_flags; 34906f70fa51STao Ma 34916f70fa51STao Ma while (write_len) { 34926f70fa51STao Ma ret = ocfs2_get_clusters(inode, cpos, &p_cluster, 34936f70fa51STao Ma &num_clusters, &ext_flags); 34946f70fa51STao Ma if (ret) { 34956f70fa51STao Ma mlog_errno(ret); 34966f70fa51STao Ma break; 34976f70fa51STao Ma } 34986f70fa51STao Ma 34996f70fa51STao Ma if (write_len < num_clusters) 35006f70fa51STao Ma num_clusters = write_len; 35016f70fa51STao Ma 35026f70fa51STao Ma if (ext_flags & OCFS2_EXT_REFCOUNTED) { 3503c7dd3392STiger Yang ret = ocfs2_refcount_cow_hunk(inode, di_bh, cpos, 350437f8a2bfSTao Ma num_clusters, max_cpos); 35056f70fa51STao Ma if (ret) { 35066f70fa51STao Ma mlog_errno(ret); 35076f70fa51STao Ma break; 35086f70fa51STao Ma } 35096f70fa51STao Ma } 35106f70fa51STao Ma 35116f70fa51STao Ma write_len -= num_clusters; 35126f70fa51STao Ma cpos += num_clusters; 35136f70fa51STao Ma } 35146f70fa51STao Ma 35156f70fa51STao Ma return ret; 35166f70fa51STao Ma } 3517110a045aSTao Ma 3518492a8a33STao Ma static int ocfs2_xattr_value_get_clusters(struct ocfs2_cow_context *context, 3519492a8a33STao Ma u32 v_cluster, u32 *p_cluster, 3520492a8a33STao Ma u32 *num_clusters, 3521492a8a33STao Ma unsigned int *extent_flags) 3522492a8a33STao Ma { 3523492a8a33STao Ma struct inode *inode = context->inode; 3524492a8a33STao Ma struct ocfs2_xattr_value_root *xv = context->cow_object; 3525492a8a33STao Ma 3526492a8a33STao Ma return ocfs2_xattr_get_clusters(inode, v_cluster, p_cluster, 3527492a8a33STao Ma num_clusters, &xv->xr_list, 3528492a8a33STao Ma extent_flags); 3529492a8a33STao Ma } 3530492a8a33STao Ma 3531492a8a33STao Ma /* 3532492a8a33STao Ma * Given a xattr value root, calculate the most meta/credits we need for 3533492a8a33STao Ma * refcount tree change if we truncate it to 0. 3534492a8a33STao Ma */ 3535492a8a33STao Ma int ocfs2_refcounted_xattr_delete_need(struct inode *inode, 3536492a8a33STao Ma struct ocfs2_caching_info *ref_ci, 3537492a8a33STao Ma struct buffer_head *ref_root_bh, 3538492a8a33STao Ma struct ocfs2_xattr_value_root *xv, 3539492a8a33STao Ma int *meta_add, int *credits) 3540492a8a33STao Ma { 3541492a8a33STao Ma int ret = 0, index, ref_blocks = 0; 3542492a8a33STao Ma u32 p_cluster, num_clusters; 3543492a8a33STao Ma u32 cpos = 0, clusters = le32_to_cpu(xv->xr_clusters); 3544492a8a33STao Ma struct ocfs2_refcount_block *rb; 3545492a8a33STao Ma struct ocfs2_refcount_rec rec; 3546492a8a33STao Ma struct buffer_head *ref_leaf_bh = NULL; 3547492a8a33STao Ma 3548492a8a33STao Ma while (cpos < clusters) { 3549492a8a33STao Ma ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, 3550492a8a33STao Ma &num_clusters, &xv->xr_list, 3551492a8a33STao Ma NULL); 3552492a8a33STao Ma if (ret) { 3553492a8a33STao Ma mlog_errno(ret); 3554492a8a33STao Ma goto out; 3555492a8a33STao Ma } 3556492a8a33STao Ma 3557492a8a33STao Ma cpos += num_clusters; 3558492a8a33STao Ma 3559492a8a33STao Ma while (num_clusters) { 3560492a8a33STao Ma ret = ocfs2_get_refcount_rec(ref_ci, ref_root_bh, 3561492a8a33STao Ma p_cluster, num_clusters, 3562492a8a33STao Ma &rec, &index, 3563492a8a33STao Ma &ref_leaf_bh); 3564492a8a33STao Ma if (ret) { 3565492a8a33STao Ma mlog_errno(ret); 3566492a8a33STao Ma goto out; 3567492a8a33STao Ma } 3568492a8a33STao Ma 3569492a8a33STao Ma BUG_ON(!rec.r_refcount); 3570492a8a33STao Ma 3571492a8a33STao Ma rb = (struct ocfs2_refcount_block *)ref_leaf_bh->b_data; 3572492a8a33STao Ma 3573492a8a33STao Ma /* 3574492a8a33STao Ma * We really don't know whether the other clusters is in 3575492a8a33STao Ma * this refcount block or not, so just take the worst 3576492a8a33STao Ma * case that all the clusters are in this block and each 3577492a8a33STao Ma * one will split a refcount rec, so totally we need 3578492a8a33STao Ma * clusters * 2 new refcount rec. 3579492a8a33STao Ma */ 3580e1bf4cc6SAl Viro if (le16_to_cpu(rb->rf_records.rl_used) + clusters * 2 > 3581492a8a33STao Ma le16_to_cpu(rb->rf_records.rl_count)) 3582492a8a33STao Ma ref_blocks++; 3583492a8a33STao Ma 3584492a8a33STao Ma *credits += 1; 3585492a8a33STao Ma brelse(ref_leaf_bh); 3586492a8a33STao Ma ref_leaf_bh = NULL; 3587492a8a33STao Ma 3588492a8a33STao Ma if (num_clusters <= le32_to_cpu(rec.r_clusters)) 3589492a8a33STao Ma break; 3590492a8a33STao Ma else 3591492a8a33STao Ma num_clusters -= le32_to_cpu(rec.r_clusters); 3592492a8a33STao Ma p_cluster += num_clusters; 3593492a8a33STao Ma } 3594492a8a33STao Ma } 3595492a8a33STao Ma 3596492a8a33STao Ma *meta_add += ref_blocks; 3597492a8a33STao Ma if (!ref_blocks) 3598492a8a33STao Ma goto out; 3599492a8a33STao Ma 3600492a8a33STao Ma rb = (struct ocfs2_refcount_block *)ref_root_bh->b_data; 3601492a8a33STao Ma if (le32_to_cpu(rb->rf_flags) & OCFS2_REFCOUNT_TREE_FL) 3602492a8a33STao Ma *credits += OCFS2_EXPAND_REFCOUNT_TREE_CREDITS; 3603492a8a33STao Ma else { 3604492a8a33STao Ma struct ocfs2_extent_tree et; 3605492a8a33STao Ma 3606492a8a33STao Ma ocfs2_init_refcount_extent_tree(&et, ref_ci, ref_root_bh); 3607492a8a33STao Ma *credits += ocfs2_calc_extend_credits(inode->i_sb, 360806f9da6eSGoldwyn Rodrigues et.et_root_el); 3609492a8a33STao Ma } 3610492a8a33STao Ma 3611492a8a33STao Ma out: 3612492a8a33STao Ma brelse(ref_leaf_bh); 3613492a8a33STao Ma return ret; 3614492a8a33STao Ma } 3615492a8a33STao Ma 3616492a8a33STao Ma /* 3617492a8a33STao Ma * Do CoW for xattr. 3618492a8a33STao Ma */ 3619492a8a33STao Ma int ocfs2_refcount_cow_xattr(struct inode *inode, 3620492a8a33STao Ma struct ocfs2_dinode *di, 3621492a8a33STao Ma struct ocfs2_xattr_value_buf *vb, 3622492a8a33STao Ma struct ocfs2_refcount_tree *ref_tree, 3623492a8a33STao Ma struct buffer_head *ref_root_bh, 3624492a8a33STao Ma u32 cpos, u32 write_len, 3625492a8a33STao Ma struct ocfs2_post_refcount *post) 3626492a8a33STao Ma { 3627492a8a33STao Ma int ret; 3628492a8a33STao Ma struct ocfs2_xattr_value_root *xv = vb->vb_xv; 3629492a8a33STao Ma struct ocfs2_cow_context *context = NULL; 3630492a8a33STao Ma u32 cow_start, cow_len; 3631492a8a33STao Ma 363284e40080SDarrick J. Wong BUG_ON(!ocfs2_is_refcount_inode(inode)); 3633492a8a33STao Ma 3634492a8a33STao Ma ret = ocfs2_refcount_cal_cow_clusters(inode, &xv->xr_list, 3635492a8a33STao Ma cpos, write_len, UINT_MAX, 3636492a8a33STao Ma &cow_start, &cow_len); 3637492a8a33STao Ma if (ret) { 3638492a8a33STao Ma mlog_errno(ret); 3639492a8a33STao Ma goto out; 3640492a8a33STao Ma } 3641492a8a33STao Ma 3642492a8a33STao Ma BUG_ON(cow_len == 0); 3643492a8a33STao Ma 3644492a8a33STao Ma context = kzalloc(sizeof(struct ocfs2_cow_context), GFP_NOFS); 3645492a8a33STao Ma if (!context) { 3646492a8a33STao Ma ret = -ENOMEM; 3647492a8a33STao Ma mlog_errno(ret); 3648492a8a33STao Ma goto out; 3649492a8a33STao Ma } 3650492a8a33STao Ma 3651492a8a33STao Ma context->inode = inode; 3652492a8a33STao Ma context->cow_start = cow_start; 3653492a8a33STao Ma context->cow_len = cow_len; 3654492a8a33STao Ma context->ref_tree = ref_tree; 36556eab04a8SJustin P. Mattock context->ref_root_bh = ref_root_bh; 3656492a8a33STao Ma context->cow_object = xv; 3657492a8a33STao Ma 3658492a8a33STao Ma context->cow_duplicate_clusters = ocfs2_duplicate_clusters_by_jbd; 3659492a8a33STao Ma /* We need the extra credits for duplicate_clusters by jbd. */ 3660492a8a33STao Ma context->extra_credits = 3661492a8a33STao Ma ocfs2_clusters_to_blocks(inode->i_sb, 1) * cow_len; 3662492a8a33STao Ma context->get_clusters = ocfs2_xattr_value_get_clusters; 3663492a8a33STao Ma context->post_refcount = post; 3664492a8a33STao Ma 3665492a8a33STao Ma ocfs2_init_xattr_value_extent_tree(&context->data_et, 3666492a8a33STao Ma INODE_CACHE(inode), vb); 3667492a8a33STao Ma 3668492a8a33STao Ma ret = ocfs2_replace_cow(context); 3669492a8a33STao Ma if (ret) 3670492a8a33STao Ma mlog_errno(ret); 3671492a8a33STao Ma 3672492a8a33STao Ma out: 3673492a8a33STao Ma kfree(context); 3674492a8a33STao Ma return ret; 3675492a8a33STao Ma } 3676492a8a33STao Ma 3677110a045aSTao Ma /* 3678110a045aSTao Ma * Insert a new extent into refcount tree and mark a extent rec 3679110a045aSTao Ma * as refcounted in the dinode tree. 3680110a045aSTao Ma */ 3681110a045aSTao Ma int ocfs2_add_refcount_flag(struct inode *inode, 3682110a045aSTao Ma struct ocfs2_extent_tree *data_et, 3683110a045aSTao Ma struct ocfs2_caching_info *ref_ci, 3684110a045aSTao Ma struct buffer_head *ref_root_bh, 3685110a045aSTao Ma u32 cpos, u32 p_cluster, u32 num_clusters, 36860129241eSTao Ma struct ocfs2_cached_dealloc_ctxt *dealloc, 36870129241eSTao Ma struct ocfs2_post_refcount *post) 3688110a045aSTao Ma { 3689110a045aSTao Ma int ret; 3690110a045aSTao Ma handle_t *handle; 3691110a045aSTao Ma int credits = 1, ref_blocks = 0; 3692110a045aSTao Ma struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); 3693110a045aSTao Ma struct ocfs2_alloc_context *meta_ac = NULL; 3694110a045aSTao Ma 36953e10b793SDarrick J. Wong /* We need to be able to handle at least an extent tree split. */ 36963e10b793SDarrick J. Wong ref_blocks = ocfs2_extend_meta_needed(data_et->et_root_el); 36973e10b793SDarrick J. Wong 3698110a045aSTao Ma ret = ocfs2_calc_refcount_meta_credits(inode->i_sb, 3699110a045aSTao Ma ref_ci, ref_root_bh, 3700110a045aSTao Ma p_cluster, num_clusters, 3701110a045aSTao Ma &ref_blocks, &credits); 3702110a045aSTao Ma if (ret) { 3703110a045aSTao Ma mlog_errno(ret); 3704110a045aSTao Ma goto out; 3705110a045aSTao Ma } 3706110a045aSTao Ma 3707198aac28STao Ma trace_ocfs2_add_refcount_flag(ref_blocks, credits); 3708110a045aSTao Ma 3709110a045aSTao Ma if (ref_blocks) { 37101119d3c0Spiaojun ret = ocfs2_reserve_new_metadata_blocks(osb, 3711110a045aSTao Ma ref_blocks, &meta_ac); 3712110a045aSTao Ma if (ret) { 3713110a045aSTao Ma mlog_errno(ret); 3714110a045aSTao Ma goto out; 3715110a045aSTao Ma } 3716110a045aSTao Ma } 3717110a045aSTao Ma 37180129241eSTao Ma if (post) 37190129241eSTao Ma credits += post->credits; 37200129241eSTao Ma 3721110a045aSTao Ma handle = ocfs2_start_trans(osb, credits); 3722110a045aSTao Ma if (IS_ERR(handle)) { 3723110a045aSTao Ma ret = PTR_ERR(handle); 3724110a045aSTao Ma mlog_errno(ret); 3725110a045aSTao Ma goto out; 3726110a045aSTao Ma } 3727110a045aSTao Ma 3728110a045aSTao Ma ret = ocfs2_mark_extent_refcounted(inode, data_et, handle, 3729110a045aSTao Ma cpos, num_clusters, p_cluster, 3730110a045aSTao Ma meta_ac, dealloc); 3731110a045aSTao Ma if (ret) { 3732110a045aSTao Ma mlog_errno(ret); 3733110a045aSTao Ma goto out_commit; 3734110a045aSTao Ma } 3735110a045aSTao Ma 37367540c1a7STao Ma ret = __ocfs2_increase_refcount(handle, ref_ci, ref_root_bh, 37377540c1a7STao Ma p_cluster, num_clusters, 0, 3738110a045aSTao Ma meta_ac, dealloc); 37390129241eSTao Ma if (ret) { 37400129241eSTao Ma mlog_errno(ret); 37410129241eSTao Ma goto out_commit; 37420129241eSTao Ma } 37430129241eSTao Ma 37440129241eSTao Ma if (post && post->func) { 37450129241eSTao Ma ret = post->func(inode, handle, post->para); 3746110a045aSTao Ma if (ret) 3747110a045aSTao Ma mlog_errno(ret); 37480129241eSTao Ma } 3749110a045aSTao Ma 3750110a045aSTao Ma out_commit: 3751110a045aSTao Ma ocfs2_commit_trans(osb, handle); 3752110a045aSTao Ma out: 3753110a045aSTao Ma if (meta_ac) 3754110a045aSTao Ma ocfs2_free_alloc_context(meta_ac); 3755110a045aSTao Ma return ret; 3756110a045aSTao Ma } 3757110a045aSTao Ma 3758a9063ab9STao Ma static int ocfs2_change_ctime(struct inode *inode, 3759110a045aSTao Ma struct buffer_head *di_bh) 3760110a045aSTao Ma { 3761110a045aSTao Ma int ret; 3762a9063ab9STao Ma handle_t *handle; 3763a9063ab9STao Ma struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; 3764a9063ab9STao Ma 3765a9063ab9STao Ma handle = ocfs2_start_trans(OCFS2_SB(inode->i_sb), 3766a9063ab9STao Ma OCFS2_INODE_UPDATE_CREDITS); 3767a9063ab9STao Ma if (IS_ERR(handle)) { 3768a9063ab9STao Ma ret = PTR_ERR(handle); 3769a9063ab9STao Ma mlog_errno(ret); 3770a9063ab9STao Ma goto out; 3771a9063ab9STao Ma } 3772a9063ab9STao Ma 3773a9063ab9STao Ma ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh, 3774a9063ab9STao Ma OCFS2_JOURNAL_ACCESS_WRITE); 3775a9063ab9STao Ma if (ret) { 3776a9063ab9STao Ma mlog_errno(ret); 3777a9063ab9STao Ma goto out_commit; 3778a9063ab9STao Ma } 3779a9063ab9STao Ma 3780078cd827SDeepa Dinamani inode->i_ctime = current_time(inode); 3781a9063ab9STao Ma di->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); 3782a9063ab9STao Ma di->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); 3783a9063ab9STao Ma 3784a9063ab9STao Ma ocfs2_journal_dirty(handle, di_bh); 3785a9063ab9STao Ma 3786a9063ab9STao Ma out_commit: 3787a9063ab9STao Ma ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); 3788a9063ab9STao Ma out: 3789a9063ab9STao Ma return ret; 3790a9063ab9STao Ma } 3791a9063ab9STao Ma 3792a9063ab9STao Ma static int ocfs2_attach_refcount_tree(struct inode *inode, 3793a9063ab9STao Ma struct buffer_head *di_bh) 3794a9063ab9STao Ma { 3795a9063ab9STao Ma int ret, data_changed = 0; 3796110a045aSTao Ma struct buffer_head *ref_root_bh = NULL; 3797110a045aSTao Ma struct ocfs2_inode_info *oi = OCFS2_I(inode); 3798110a045aSTao Ma struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; 3799110a045aSTao Ma struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); 3800110a045aSTao Ma struct ocfs2_refcount_tree *ref_tree; 3801110a045aSTao Ma unsigned int ext_flags; 3802110a045aSTao Ma loff_t size; 3803110a045aSTao Ma u32 cpos, num_clusters, clusters, p_cluster; 3804110a045aSTao Ma struct ocfs2_cached_dealloc_ctxt dealloc; 3805110a045aSTao Ma struct ocfs2_extent_tree di_et; 3806110a045aSTao Ma 3807110a045aSTao Ma ocfs2_init_dealloc_ctxt(&dealloc); 3808110a045aSTao Ma 380984e40080SDarrick J. Wong if (!ocfs2_is_refcount_inode(inode)) { 3810110a045aSTao Ma ret = ocfs2_create_refcount_tree(inode, di_bh); 3811110a045aSTao Ma if (ret) { 3812110a045aSTao Ma mlog_errno(ret); 3813110a045aSTao Ma goto out; 3814110a045aSTao Ma } 3815110a045aSTao Ma } 3816110a045aSTao Ma 3817110a045aSTao Ma BUG_ON(!di->i_refcount_loc); 3818110a045aSTao Ma ret = ocfs2_lock_refcount_tree(osb, 3819110a045aSTao Ma le64_to_cpu(di->i_refcount_loc), 1, 3820110a045aSTao Ma &ref_tree, &ref_root_bh); 3821110a045aSTao Ma if (ret) { 3822110a045aSTao Ma mlog_errno(ret); 3823110a045aSTao Ma goto out; 3824110a045aSTao Ma } 3825110a045aSTao Ma 38262f48d593STao Ma if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) 38272f48d593STao Ma goto attach_xattr; 38282f48d593STao Ma 3829110a045aSTao Ma ocfs2_init_dinode_extent_tree(&di_et, INODE_CACHE(inode), di_bh); 3830110a045aSTao Ma 3831110a045aSTao Ma size = i_size_read(inode); 3832110a045aSTao Ma clusters = ocfs2_clusters_for_bytes(inode->i_sb, size); 3833110a045aSTao Ma 3834110a045aSTao Ma cpos = 0; 3835110a045aSTao Ma while (cpos < clusters) { 3836110a045aSTao Ma ret = ocfs2_get_clusters(inode, cpos, &p_cluster, 3837110a045aSTao Ma &num_clusters, &ext_flags); 38382b0f6eaeSJoseph Qi if (ret) { 38392b0f6eaeSJoseph Qi mlog_errno(ret); 38402b0f6eaeSJoseph Qi goto unlock; 38412b0f6eaeSJoseph Qi } 3842110a045aSTao Ma if (p_cluster && !(ext_flags & OCFS2_EXT_REFCOUNTED)) { 3843110a045aSTao Ma ret = ocfs2_add_refcount_flag(inode, &di_et, 3844110a045aSTao Ma &ref_tree->rf_ci, 3845110a045aSTao Ma ref_root_bh, cpos, 3846110a045aSTao Ma p_cluster, num_clusters, 38470129241eSTao Ma &dealloc, NULL); 3848110a045aSTao Ma if (ret) { 3849110a045aSTao Ma mlog_errno(ret); 3850a9063ab9STao Ma goto unlock; 3851110a045aSTao Ma } 3852a9063ab9STao Ma 3853a9063ab9STao Ma data_changed = 1; 3854110a045aSTao Ma } 3855110a045aSTao Ma cpos += num_clusters; 3856110a045aSTao Ma } 3857110a045aSTao Ma 38582f48d593STao Ma attach_xattr: 38590129241eSTao Ma if (oi->ip_dyn_features & OCFS2_HAS_XATTR_FL) { 38600129241eSTao Ma ret = ocfs2_xattr_attach_refcount_tree(inode, di_bh, 38610129241eSTao Ma &ref_tree->rf_ci, 38620129241eSTao Ma ref_root_bh, 38630129241eSTao Ma &dealloc); 38640129241eSTao Ma if (ret) { 38650129241eSTao Ma mlog_errno(ret); 38660129241eSTao Ma goto unlock; 38670129241eSTao Ma } 38680129241eSTao Ma } 38690129241eSTao Ma 3870a9063ab9STao Ma if (data_changed) { 3871a9063ab9STao Ma ret = ocfs2_change_ctime(inode, di_bh); 3872a9063ab9STao Ma if (ret) 3873a9063ab9STao Ma mlog_errno(ret); 3874a9063ab9STao Ma } 3875a9063ab9STao Ma 3876a9063ab9STao Ma unlock: 3877110a045aSTao Ma ocfs2_unlock_refcount_tree(osb, ref_tree, 1); 3878110a045aSTao Ma brelse(ref_root_bh); 3879110a045aSTao Ma 3880110a045aSTao Ma if (!ret && ocfs2_dealloc_has_cluster(&dealloc)) { 3881110a045aSTao Ma ocfs2_schedule_truncate_log_flush(osb, 1); 3882110a045aSTao Ma ocfs2_run_deallocs(osb, &dealloc); 3883110a045aSTao Ma } 3884110a045aSTao Ma out: 3885110a045aSTao Ma /* 3886110a045aSTao Ma * Empty the extent map so that we may get the right extent 3887110a045aSTao Ma * record from the disk. 3888110a045aSTao Ma */ 3889110a045aSTao Ma ocfs2_extent_map_trunc(inode, 0); 3890110a045aSTao Ma 3891110a045aSTao Ma return ret; 3892110a045aSTao Ma } 3893110a045aSTao Ma 3894110a045aSTao Ma static int ocfs2_add_refcounted_extent(struct inode *inode, 3895110a045aSTao Ma struct ocfs2_extent_tree *et, 3896110a045aSTao Ma struct ocfs2_caching_info *ref_ci, 3897110a045aSTao Ma struct buffer_head *ref_root_bh, 3898110a045aSTao Ma u32 cpos, u32 p_cluster, u32 num_clusters, 3899110a045aSTao Ma unsigned int ext_flags, 3900110a045aSTao Ma struct ocfs2_cached_dealloc_ctxt *dealloc) 3901110a045aSTao Ma { 3902110a045aSTao Ma int ret; 3903110a045aSTao Ma handle_t *handle; 3904110a045aSTao Ma int credits = 0; 3905110a045aSTao Ma struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); 3906110a045aSTao Ma struct ocfs2_alloc_context *meta_ac = NULL; 3907110a045aSTao Ma 3908110a045aSTao Ma ret = ocfs2_lock_refcount_allocators(inode->i_sb, 3909110a045aSTao Ma p_cluster, num_clusters, 3910110a045aSTao Ma et, ref_ci, 3911110a045aSTao Ma ref_root_bh, &meta_ac, 3912110a045aSTao Ma NULL, &credits); 3913110a045aSTao Ma if (ret) { 3914110a045aSTao Ma mlog_errno(ret); 3915110a045aSTao Ma goto out; 3916110a045aSTao Ma } 3917110a045aSTao Ma 3918110a045aSTao Ma handle = ocfs2_start_trans(osb, credits); 3919110a045aSTao Ma if (IS_ERR(handle)) { 3920110a045aSTao Ma ret = PTR_ERR(handle); 3921110a045aSTao Ma mlog_errno(ret); 3922110a045aSTao Ma goto out; 3923110a045aSTao Ma } 3924110a045aSTao Ma 3925110a045aSTao Ma ret = ocfs2_insert_extent(handle, et, cpos, 392612d4cec9STao Ma ocfs2_clusters_to_blocks(inode->i_sb, p_cluster), 3927110a045aSTao Ma num_clusters, ext_flags, meta_ac); 3928110a045aSTao Ma if (ret) { 3929110a045aSTao Ma mlog_errno(ret); 3930110a045aSTao Ma goto out_commit; 3931110a045aSTao Ma } 3932110a045aSTao Ma 39332999d12fSTao Ma ret = ocfs2_increase_refcount(handle, ref_ci, ref_root_bh, 3934110a045aSTao Ma p_cluster, num_clusters, 3935110a045aSTao Ma meta_ac, dealloc); 393686e59436SDarrick J. Wong if (ret) { 393786e59436SDarrick J. Wong mlog_errno(ret); 393886e59436SDarrick J. Wong goto out_commit; 393986e59436SDarrick J. Wong } 394086e59436SDarrick J. Wong 394186e59436SDarrick J. Wong ret = dquot_alloc_space_nodirty(inode, 394286e59436SDarrick J. Wong ocfs2_clusters_to_bytes(osb->sb, num_clusters)); 3943110a045aSTao Ma if (ret) 3944110a045aSTao Ma mlog_errno(ret); 3945110a045aSTao Ma 3946110a045aSTao Ma out_commit: 3947110a045aSTao Ma ocfs2_commit_trans(osb, handle); 3948110a045aSTao Ma out: 3949110a045aSTao Ma if (meta_ac) 3950110a045aSTao Ma ocfs2_free_alloc_context(meta_ac); 3951110a045aSTao Ma return ret; 3952110a045aSTao Ma } 3953110a045aSTao Ma 39542f48d593STao Ma static int ocfs2_duplicate_inline_data(struct inode *s_inode, 39552f48d593STao Ma struct buffer_head *s_bh, 39562f48d593STao Ma struct inode *t_inode, 39572f48d593STao Ma struct buffer_head *t_bh) 39582f48d593STao Ma { 39592f48d593STao Ma int ret; 39602f48d593STao Ma handle_t *handle; 39612f48d593STao Ma struct ocfs2_super *osb = OCFS2_SB(s_inode->i_sb); 39622f48d593STao Ma struct ocfs2_dinode *s_di = (struct ocfs2_dinode *)s_bh->b_data; 39632f48d593STao Ma struct ocfs2_dinode *t_di = (struct ocfs2_dinode *)t_bh->b_data; 39642f48d593STao Ma 39652f48d593STao Ma BUG_ON(!(OCFS2_I(s_inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL)); 39662f48d593STao Ma 39672f48d593STao Ma handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); 39682f48d593STao Ma if (IS_ERR(handle)) { 39692f48d593STao Ma ret = PTR_ERR(handle); 39702f48d593STao Ma mlog_errno(ret); 39712f48d593STao Ma goto out; 39722f48d593STao Ma } 39732f48d593STao Ma 39742f48d593STao Ma ret = ocfs2_journal_access_di(handle, INODE_CACHE(t_inode), t_bh, 39752f48d593STao Ma OCFS2_JOURNAL_ACCESS_WRITE); 39762f48d593STao Ma if (ret) { 39772f48d593STao Ma mlog_errno(ret); 39782f48d593STao Ma goto out_commit; 39792f48d593STao Ma } 39802f48d593STao Ma 39812f48d593STao Ma t_di->id2.i_data.id_count = s_di->id2.i_data.id_count; 39822f48d593STao Ma memcpy(t_di->id2.i_data.id_data, s_di->id2.i_data.id_data, 39832f48d593STao Ma le16_to_cpu(s_di->id2.i_data.id_count)); 39842f48d593STao Ma spin_lock(&OCFS2_I(t_inode)->ip_lock); 39852f48d593STao Ma OCFS2_I(t_inode)->ip_dyn_features |= OCFS2_INLINE_DATA_FL; 39862f48d593STao Ma t_di->i_dyn_features = cpu_to_le16(OCFS2_I(t_inode)->ip_dyn_features); 39872f48d593STao Ma spin_unlock(&OCFS2_I(t_inode)->ip_lock); 39882f48d593STao Ma 39892f48d593STao Ma ocfs2_journal_dirty(handle, t_bh); 39902f48d593STao Ma 39912f48d593STao Ma out_commit: 39922f48d593STao Ma ocfs2_commit_trans(osb, handle); 39932f48d593STao Ma out: 39942f48d593STao Ma return ret; 39952f48d593STao Ma } 39962f48d593STao Ma 3997110a045aSTao Ma static int ocfs2_duplicate_extent_list(struct inode *s_inode, 3998110a045aSTao Ma struct inode *t_inode, 3999110a045aSTao Ma struct buffer_head *t_bh, 4000110a045aSTao Ma struct ocfs2_caching_info *ref_ci, 4001110a045aSTao Ma struct buffer_head *ref_root_bh, 4002110a045aSTao Ma struct ocfs2_cached_dealloc_ctxt *dealloc) 4003110a045aSTao Ma { 4004110a045aSTao Ma int ret = 0; 4005110a045aSTao Ma u32 p_cluster, num_clusters, clusters, cpos; 4006110a045aSTao Ma loff_t size; 4007110a045aSTao Ma unsigned int ext_flags; 4008110a045aSTao Ma struct ocfs2_extent_tree et; 4009110a045aSTao Ma 4010110a045aSTao Ma ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(t_inode), t_bh); 4011110a045aSTao Ma 4012110a045aSTao Ma size = i_size_read(s_inode); 4013110a045aSTao Ma clusters = ocfs2_clusters_for_bytes(s_inode->i_sb, size); 4014110a045aSTao Ma 4015110a045aSTao Ma cpos = 0; 4016110a045aSTao Ma while (cpos < clusters) { 4017110a045aSTao Ma ret = ocfs2_get_clusters(s_inode, cpos, &p_cluster, 4018110a045aSTao Ma &num_clusters, &ext_flags); 40192b0f6eaeSJoseph Qi if (ret) { 40202b0f6eaeSJoseph Qi mlog_errno(ret); 40212b0f6eaeSJoseph Qi goto out; 40222b0f6eaeSJoseph Qi } 4023110a045aSTao Ma if (p_cluster) { 4024110a045aSTao Ma ret = ocfs2_add_refcounted_extent(t_inode, &et, 4025110a045aSTao Ma ref_ci, ref_root_bh, 4026110a045aSTao Ma cpos, p_cluster, 4027110a045aSTao Ma num_clusters, 4028110a045aSTao Ma ext_flags, 4029110a045aSTao Ma dealloc); 4030110a045aSTao Ma if (ret) { 4031110a045aSTao Ma mlog_errno(ret); 4032110a045aSTao Ma goto out; 4033110a045aSTao Ma } 4034110a045aSTao Ma } 4035110a045aSTao Ma 4036110a045aSTao Ma cpos += num_clusters; 4037110a045aSTao Ma } 4038110a045aSTao Ma 4039110a045aSTao Ma out: 4040110a045aSTao Ma return ret; 4041110a045aSTao Ma } 4042110a045aSTao Ma 4043a9063ab9STao Ma /* 4044a9063ab9STao Ma * change the new file's attributes to the src. 4045a9063ab9STao Ma * 4046a9063ab9STao Ma * reflink creates a snapshot of a file, that means the attributes 4047a9063ab9STao Ma * must be identical except for three exceptions - nlink, ino, and ctime. 4048a9063ab9STao Ma */ 4049a9063ab9STao Ma static int ocfs2_complete_reflink(struct inode *s_inode, 4050a9063ab9STao Ma struct buffer_head *s_bh, 4051a9063ab9STao Ma struct inode *t_inode, 40520fe9b66cSTao Ma struct buffer_head *t_bh, 40530fe9b66cSTao Ma bool preserve) 4054a9063ab9STao Ma { 4055a9063ab9STao Ma int ret; 4056a9063ab9STao Ma handle_t *handle; 4057a9063ab9STao Ma struct ocfs2_dinode *s_di = (struct ocfs2_dinode *)s_bh->b_data; 4058a9063ab9STao Ma struct ocfs2_dinode *di = (struct ocfs2_dinode *)t_bh->b_data; 4059a9063ab9STao Ma loff_t size = i_size_read(s_inode); 4060a9063ab9STao Ma 4061a9063ab9STao Ma handle = ocfs2_start_trans(OCFS2_SB(t_inode->i_sb), 4062a9063ab9STao Ma OCFS2_INODE_UPDATE_CREDITS); 4063a9063ab9STao Ma if (IS_ERR(handle)) { 4064a9063ab9STao Ma ret = PTR_ERR(handle); 4065a9063ab9STao Ma mlog_errno(ret); 4066a9063ab9STao Ma return ret; 4067a9063ab9STao Ma } 4068a9063ab9STao Ma 4069a9063ab9STao Ma ret = ocfs2_journal_access_di(handle, INODE_CACHE(t_inode), t_bh, 4070a9063ab9STao Ma OCFS2_JOURNAL_ACCESS_WRITE); 4071a9063ab9STao Ma if (ret) { 4072a9063ab9STao Ma mlog_errno(ret); 4073a9063ab9STao Ma goto out_commit; 4074a9063ab9STao Ma } 4075a9063ab9STao Ma 4076a9063ab9STao Ma spin_lock(&OCFS2_I(t_inode)->ip_lock); 4077a9063ab9STao Ma OCFS2_I(t_inode)->ip_clusters = OCFS2_I(s_inode)->ip_clusters; 4078a9063ab9STao Ma OCFS2_I(t_inode)->ip_attr = OCFS2_I(s_inode)->ip_attr; 4079a9063ab9STao Ma OCFS2_I(t_inode)->ip_dyn_features = OCFS2_I(s_inode)->ip_dyn_features; 4080a9063ab9STao Ma spin_unlock(&OCFS2_I(t_inode)->ip_lock); 4081a9063ab9STao Ma i_size_write(t_inode, size); 40826527f8f8STao Ma t_inode->i_blocks = s_inode->i_blocks; 4083a9063ab9STao Ma 4084a9063ab9STao Ma di->i_xattr_inline_size = s_di->i_xattr_inline_size; 4085a9063ab9STao Ma di->i_clusters = s_di->i_clusters; 4086a9063ab9STao Ma di->i_size = s_di->i_size; 4087a9063ab9STao Ma di->i_dyn_features = s_di->i_dyn_features; 4088a9063ab9STao Ma di->i_attr = s_di->i_attr; 40890fe9b66cSTao Ma 40900fe9b66cSTao Ma if (preserve) { 4091c21a534eSTao Ma t_inode->i_uid = s_inode->i_uid; 4092c21a534eSTao Ma t_inode->i_gid = s_inode->i_gid; 4093c21a534eSTao Ma t_inode->i_mode = s_inode->i_mode; 4094a9063ab9STao Ma di->i_uid = s_di->i_uid; 4095a9063ab9STao Ma di->i_gid = s_di->i_gid; 4096a9063ab9STao Ma di->i_mode = s_di->i_mode; 4097a9063ab9STao Ma 4098a9063ab9STao Ma /* 4099a9063ab9STao Ma * update time. 41000fe9b66cSTao Ma * we want mtime to appear identical to the source and 41010fe9b66cSTao Ma * update ctime. 4102a9063ab9STao Ma */ 4103078cd827SDeepa Dinamani t_inode->i_ctime = current_time(t_inode); 4104a9063ab9STao Ma 4105a9063ab9STao Ma di->i_ctime = cpu_to_le64(t_inode->i_ctime.tv_sec); 4106a9063ab9STao Ma di->i_ctime_nsec = cpu_to_le32(t_inode->i_ctime.tv_nsec); 4107a9063ab9STao Ma 4108a9063ab9STao Ma t_inode->i_mtime = s_inode->i_mtime; 4109a9063ab9STao Ma di->i_mtime = s_di->i_mtime; 4110a9063ab9STao Ma di->i_mtime_nsec = s_di->i_mtime_nsec; 41110fe9b66cSTao Ma } 4112a9063ab9STao Ma 4113a9063ab9STao Ma ocfs2_journal_dirty(handle, t_bh); 4114a9063ab9STao Ma 4115a9063ab9STao Ma out_commit: 4116a9063ab9STao Ma ocfs2_commit_trans(OCFS2_SB(t_inode->i_sb), handle); 4117a9063ab9STao Ma return ret; 4118a9063ab9STao Ma } 4119a9063ab9STao Ma 4120110a045aSTao Ma static int ocfs2_create_reflink_node(struct inode *s_inode, 4121110a045aSTao Ma struct buffer_head *s_bh, 4122110a045aSTao Ma struct inode *t_inode, 41230fe9b66cSTao Ma struct buffer_head *t_bh, 41240fe9b66cSTao Ma bool preserve) 4125110a045aSTao Ma { 4126110a045aSTao Ma int ret; 4127110a045aSTao Ma struct buffer_head *ref_root_bh = NULL; 4128110a045aSTao Ma struct ocfs2_cached_dealloc_ctxt dealloc; 4129110a045aSTao Ma struct ocfs2_super *osb = OCFS2_SB(s_inode->i_sb); 4130110a045aSTao Ma struct ocfs2_dinode *di = (struct ocfs2_dinode *)s_bh->b_data; 4131110a045aSTao Ma struct ocfs2_refcount_tree *ref_tree; 4132110a045aSTao Ma 4133110a045aSTao Ma ocfs2_init_dealloc_ctxt(&dealloc); 4134110a045aSTao Ma 4135110a045aSTao Ma ret = ocfs2_set_refcount_tree(t_inode, t_bh, 4136110a045aSTao Ma le64_to_cpu(di->i_refcount_loc)); 4137110a045aSTao Ma if (ret) { 4138110a045aSTao Ma mlog_errno(ret); 4139110a045aSTao Ma goto out; 4140110a045aSTao Ma } 4141110a045aSTao Ma 41422f48d593STao Ma if (OCFS2_I(s_inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { 41432f48d593STao Ma ret = ocfs2_duplicate_inline_data(s_inode, s_bh, 41442f48d593STao Ma t_inode, t_bh); 41452f48d593STao Ma if (ret) 41462f48d593STao Ma mlog_errno(ret); 41472f48d593STao Ma goto out; 41482f48d593STao Ma } 41492f48d593STao Ma 4150110a045aSTao Ma ret = ocfs2_lock_refcount_tree(osb, le64_to_cpu(di->i_refcount_loc), 4151110a045aSTao Ma 1, &ref_tree, &ref_root_bh); 4152110a045aSTao Ma if (ret) { 4153110a045aSTao Ma mlog_errno(ret); 4154110a045aSTao Ma goto out; 4155110a045aSTao Ma } 4156110a045aSTao Ma 4157110a045aSTao Ma ret = ocfs2_duplicate_extent_list(s_inode, t_inode, t_bh, 4158110a045aSTao Ma &ref_tree->rf_ci, ref_root_bh, 4159110a045aSTao Ma &dealloc); 4160a9063ab9STao Ma if (ret) { 4161a9063ab9STao Ma mlog_errno(ret); 4162a9063ab9STao Ma goto out_unlock_refcount; 4163a9063ab9STao Ma } 4164a9063ab9STao Ma 4165a9063ab9STao Ma out_unlock_refcount: 4166110a045aSTao Ma ocfs2_unlock_refcount_tree(osb, ref_tree, 1); 4167110a045aSTao Ma brelse(ref_root_bh); 4168110a045aSTao Ma out: 4169110a045aSTao Ma if (ocfs2_dealloc_has_cluster(&dealloc)) { 4170110a045aSTao Ma ocfs2_schedule_truncate_log_flush(osb, 1); 4171110a045aSTao Ma ocfs2_run_deallocs(osb, &dealloc); 4172110a045aSTao Ma } 4173110a045aSTao Ma 4174110a045aSTao Ma return ret; 4175110a045aSTao Ma } 417609bf27a0STao Ma 417709bf27a0STao Ma static int __ocfs2_reflink(struct dentry *old_dentry, 417809bf27a0STao Ma struct buffer_head *old_bh, 417909bf27a0STao Ma struct inode *new_inode, 418009bf27a0STao Ma bool preserve) 418109bf27a0STao Ma { 418209bf27a0STao Ma int ret; 41832b0143b5SDavid Howells struct inode *inode = d_inode(old_dentry); 418409bf27a0STao Ma struct buffer_head *new_bh = NULL; 418509bf27a0STao Ma 41865693486bSJoel Becker if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_SYSTEM_FILE) { 41875693486bSJoel Becker ret = -EINVAL; 41885693486bSJoel Becker mlog_errno(ret); 41895693486bSJoel Becker goto out; 41905693486bSJoel Becker } 41915693486bSJoel Becker 419209bf27a0STao Ma ret = filemap_fdatawrite(inode->i_mapping); 419309bf27a0STao Ma if (ret) { 419409bf27a0STao Ma mlog_errno(ret); 419509bf27a0STao Ma goto out; 419609bf27a0STao Ma } 419709bf27a0STao Ma 419809bf27a0STao Ma ret = ocfs2_attach_refcount_tree(inode, old_bh); 419909bf27a0STao Ma if (ret) { 420009bf27a0STao Ma mlog_errno(ret); 420109bf27a0STao Ma goto out; 420209bf27a0STao Ma } 420309bf27a0STao Ma 42045955102cSAl Viro inode_lock_nested(new_inode, I_MUTEX_CHILD); 420507eaac94STao Ma ret = ocfs2_inode_lock_nested(new_inode, &new_bh, 1, 420607eaac94STao Ma OI_LS_REFLINK_TARGET); 420709bf27a0STao Ma if (ret) { 420809bf27a0STao Ma mlog_errno(ret); 420909bf27a0STao Ma goto out_unlock; 421009bf27a0STao Ma } 421109bf27a0STao Ma 421209bf27a0STao Ma ret = ocfs2_create_reflink_node(inode, old_bh, 421309bf27a0STao Ma new_inode, new_bh, preserve); 421409bf27a0STao Ma if (ret) { 421509bf27a0STao Ma mlog_errno(ret); 421609bf27a0STao Ma goto inode_unlock; 421709bf27a0STao Ma } 421809bf27a0STao Ma 421909bf27a0STao Ma if (OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_XATTR_FL) { 422009bf27a0STao Ma ret = ocfs2_reflink_xattrs(inode, old_bh, 422109bf27a0STao Ma new_inode, new_bh, 422209bf27a0STao Ma preserve); 422387f4b1bbSTao Ma if (ret) { 422487f4b1bbSTao Ma mlog_errno(ret); 422587f4b1bbSTao Ma goto inode_unlock; 422687f4b1bbSTao Ma } 422787f4b1bbSTao Ma } 422887f4b1bbSTao Ma 422987f4b1bbSTao Ma ret = ocfs2_complete_reflink(inode, old_bh, 423087f4b1bbSTao Ma new_inode, new_bh, preserve); 423109bf27a0STao Ma if (ret) 423209bf27a0STao Ma mlog_errno(ret); 423387f4b1bbSTao Ma 423409bf27a0STao Ma inode_unlock: 423509bf27a0STao Ma ocfs2_inode_unlock(new_inode, 1); 423609bf27a0STao Ma brelse(new_bh); 423709bf27a0STao Ma out_unlock: 42385955102cSAl Viro inode_unlock(new_inode); 423909bf27a0STao Ma out: 424009bf27a0STao Ma if (!ret) { 424109bf27a0STao Ma ret = filemap_fdatawait(inode->i_mapping); 424209bf27a0STao Ma if (ret) 424309bf27a0STao Ma mlog_errno(ret); 424409bf27a0STao Ma } 424509bf27a0STao Ma return ret; 424609bf27a0STao Ma } 424709bf27a0STao Ma 424809bf27a0STao Ma static int ocfs2_reflink(struct dentry *old_dentry, struct inode *dir, 424909bf27a0STao Ma struct dentry *new_dentry, bool preserve) 425009bf27a0STao Ma { 4251e4383029SAshish Samant int error, had_lock; 42522b0143b5SDavid Howells struct inode *inode = d_inode(old_dentry); 425309bf27a0STao Ma struct buffer_head *old_bh = NULL; 425409bf27a0STao Ma struct inode *new_orphan_inode = NULL; 4255e4383029SAshish Samant struct ocfs2_lock_holder oh; 425609bf27a0STao Ma 425709bf27a0STao Ma if (!ocfs2_refcount_tree(OCFS2_SB(inode->i_sb))) 425809bf27a0STao Ma return -EOPNOTSUPP; 425909bf27a0STao Ma 4260702e5bc6SChristoph Hellwig 4261c25a1e06SJunxiao Bi error = ocfs2_create_inode_in_orphan(dir, inode->i_mode, 426209bf27a0STao Ma &new_orphan_inode); 426309bf27a0STao Ma if (error) { 426409bf27a0STao Ma mlog_errno(error); 426509bf27a0STao Ma goto out; 426609bf27a0STao Ma } 426709bf27a0STao Ma 42688a8ad1c2SWengang Wang error = ocfs2_rw_lock(inode, 1); 42698a8ad1c2SWengang Wang if (error) { 42708a8ad1c2SWengang Wang mlog_errno(error); 42718a8ad1c2SWengang Wang goto out; 42728a8ad1c2SWengang Wang } 42738a8ad1c2SWengang Wang 427409bf27a0STao Ma error = ocfs2_inode_lock(inode, &old_bh, 1); 427509bf27a0STao Ma if (error) { 427609bf27a0STao Ma mlog_errno(error); 42778a8ad1c2SWengang Wang ocfs2_rw_unlock(inode, 1); 427809bf27a0STao Ma goto out; 427909bf27a0STao Ma } 428009bf27a0STao Ma 428109bf27a0STao Ma down_write(&OCFS2_I(inode)->ip_xattr_sem); 428209bf27a0STao Ma down_write(&OCFS2_I(inode)->ip_alloc_sem); 428309bf27a0STao Ma error = __ocfs2_reflink(old_dentry, old_bh, 428409bf27a0STao Ma new_orphan_inode, preserve); 428509bf27a0STao Ma up_write(&OCFS2_I(inode)->ip_alloc_sem); 428609bf27a0STao Ma up_write(&OCFS2_I(inode)->ip_xattr_sem); 428709bf27a0STao Ma 428809bf27a0STao Ma ocfs2_inode_unlock(inode, 1); 42898a8ad1c2SWengang Wang ocfs2_rw_unlock(inode, 1); 429009bf27a0STao Ma brelse(old_bh); 429109bf27a0STao Ma 429209bf27a0STao Ma if (error) { 429309bf27a0STao Ma mlog_errno(error); 429409bf27a0STao Ma goto out; 429509bf27a0STao Ma } 429609bf27a0STao Ma 4297e4383029SAshish Samant had_lock = ocfs2_inode_lock_tracker(new_orphan_inode, NULL, 1, 4298e4383029SAshish Samant &oh); 4299e4383029SAshish Samant if (had_lock < 0) { 4300e4383029SAshish Samant error = had_lock; 4301e4383029SAshish Samant mlog_errno(error); 4302e4383029SAshish Samant goto out; 4303e4383029SAshish Samant } 4304e4383029SAshish Samant 430509bf27a0STao Ma /* If the security isn't preserved, we need to re-initialize them. */ 430609bf27a0STao Ma if (!preserve) { 43072a7dba39SEric Paris error = ocfs2_init_security_and_acl(dir, new_orphan_inode, 4308c25a1e06SJunxiao Bi &new_dentry->d_name); 430909bf27a0STao Ma if (error) 431009bf27a0STao Ma mlog_errno(error); 431109bf27a0STao Ma } 431209bf27a0STao Ma if (!error) { 431309bf27a0STao Ma error = ocfs2_mv_orphaned_inode_to_new(dir, new_orphan_inode, 431409bf27a0STao Ma new_dentry); 431509bf27a0STao Ma if (error) 431609bf27a0STao Ma mlog_errno(error); 431709bf27a0STao Ma } 4318e4383029SAshish Samant ocfs2_inode_unlock_tracker(new_orphan_inode, 1, &oh, had_lock); 431909bf27a0STao Ma 4320e4383029SAshish Samant out: 432109bf27a0STao Ma if (new_orphan_inode) { 432209bf27a0STao Ma /* 432309bf27a0STao Ma * We need to open_unlock the inode no matter whether we 432409bf27a0STao Ma * succeed or not, so that other nodes can delete it later. 432509bf27a0STao Ma */ 432609bf27a0STao Ma ocfs2_open_unlock(new_orphan_inode); 432709bf27a0STao Ma if (error) 432809bf27a0STao Ma iput(new_orphan_inode); 432909bf27a0STao Ma } 433009bf27a0STao Ma 433109bf27a0STao Ma return error; 433209bf27a0STao Ma } 4333bd50873dSTao Ma 4334bd50873dSTao Ma /* 4335bd50873dSTao Ma * Below here are the bits used by OCFS2_IOC_REFLINK() to fake 4336bd50873dSTao Ma * sys_reflink(). This will go away when vfs_reflink() exists in 4337bd50873dSTao Ma * fs/namei.c. 4338bd50873dSTao Ma */ 4339bd50873dSTao Ma 4340bd50873dSTao Ma /* copied from may_create in VFS. */ 4341bd50873dSTao Ma static inline int ocfs2_may_create(struct inode *dir, struct dentry *child) 4342bd50873dSTao Ma { 43432b0143b5SDavid Howells if (d_really_is_positive(child)) 4344bd50873dSTao Ma return -EEXIST; 4345bd50873dSTao Ma if (IS_DEADDIR(dir)) 4346bd50873dSTao Ma return -ENOENT; 434747291baaSChristian Brauner return inode_permission(&init_user_ns, dir, MAY_WRITE | MAY_EXEC); 4348bd50873dSTao Ma } 4349bd50873dSTao Ma 4350bd50873dSTao Ma /** 4351bd50873dSTao Ma * ocfs2_vfs_reflink - Create a reference-counted link 4352bd50873dSTao Ma * 4353bd50873dSTao Ma * @old_dentry: source dentry + inode 4354bd50873dSTao Ma * @dir: directory to create the target 4355bd50873dSTao Ma * @new_dentry: target dentry 4356bd50873dSTao Ma * @preserve: if true, preserve all file attributes 4357bd50873dSTao Ma */ 435812d4cec9STao Ma static int ocfs2_vfs_reflink(struct dentry *old_dentry, struct inode *dir, 4359bd50873dSTao Ma struct dentry *new_dentry, bool preserve) 4360bd50873dSTao Ma { 43612b0143b5SDavid Howells struct inode *inode = d_inode(old_dentry); 4362bd50873dSTao Ma int error; 4363bd50873dSTao Ma 4364bd50873dSTao Ma if (!inode) 4365bd50873dSTao Ma return -ENOENT; 4366bd50873dSTao Ma 4367bd50873dSTao Ma error = ocfs2_may_create(dir, new_dentry); 4368bd50873dSTao Ma if (error) 4369bd50873dSTao Ma return error; 4370bd50873dSTao Ma 4371bd50873dSTao Ma if (dir->i_sb != inode->i_sb) 4372bd50873dSTao Ma return -EXDEV; 4373bd50873dSTao Ma 4374bd50873dSTao Ma /* 4375bd50873dSTao Ma * A reflink to an append-only or immutable file cannot be created. 4376bd50873dSTao Ma */ 4377bd50873dSTao Ma if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) 4378bd50873dSTao Ma return -EPERM; 4379bd50873dSTao Ma 4380bd50873dSTao Ma /* Only regular files can be reflinked. */ 4381bd50873dSTao Ma if (!S_ISREG(inode->i_mode)) 4382bd50873dSTao Ma return -EPERM; 4383bd50873dSTao Ma 4384bd50873dSTao Ma /* 4385bd50873dSTao Ma * If the caller wants to preserve ownership, they require the 4386bd50873dSTao Ma * rights to do so. 4387bd50873dSTao Ma */ 4388bd50873dSTao Ma if (preserve) { 4389488c8ef0SEric W. Biederman if (!uid_eq(current_fsuid(), inode->i_uid) && !capable(CAP_CHOWN)) 4390bd50873dSTao Ma return -EPERM; 4391bd50873dSTao Ma if (!in_group_p(inode->i_gid) && !capable(CAP_CHOWN)) 4392bd50873dSTao Ma return -EPERM; 4393bd50873dSTao Ma } 4394bd50873dSTao Ma 4395bd50873dSTao Ma /* 4396bd50873dSTao Ma * If the caller is modifying any aspect of the attributes, they 4397bd50873dSTao Ma * are not creating a snapshot. They need read permission on the 4398bd50873dSTao Ma * file. 4399bd50873dSTao Ma */ 4400bd50873dSTao Ma if (!preserve) { 440147291baaSChristian Brauner error = inode_permission(&init_user_ns, inode, MAY_READ); 4402bd50873dSTao Ma if (error) 4403bd50873dSTao Ma return error; 4404bd50873dSTao Ma } 4405bd50873dSTao Ma 44065955102cSAl Viro inode_lock(inode); 44079c89fe0aSJan Kara error = dquot_initialize(dir); 44089c89fe0aSJan Kara if (!error) 4409bd50873dSTao Ma error = ocfs2_reflink(old_dentry, dir, new_dentry, preserve); 44105955102cSAl Viro inode_unlock(inode); 4411bd50873dSTao Ma if (!error) 4412bd50873dSTao Ma fsnotify_create(dir, new_dentry); 4413bd50873dSTao Ma return error; 4414bd50873dSTao Ma } 4415bd50873dSTao Ma /* 4416bd50873dSTao Ma * Most codes are copied from sys_linkat. 4417bd50873dSTao Ma */ 4418bd50873dSTao Ma int ocfs2_reflink_ioctl(struct inode *inode, 4419bd50873dSTao Ma const char __user *oldname, 4420bd50873dSTao Ma const char __user *newname, 4421bd50873dSTao Ma bool preserve) 4422bd50873dSTao Ma { 4423bd50873dSTao Ma struct dentry *new_dentry; 4424dae6ad8fSAl Viro struct path old_path, new_path; 4425bd50873dSTao Ma int error; 4426bd50873dSTao Ma 4427bd50873dSTao Ma if (!ocfs2_refcount_tree(OCFS2_SB(inode->i_sb))) 4428bd50873dSTao Ma return -EOPNOTSUPP; 4429bd50873dSTao Ma 4430bd50873dSTao Ma error = user_path_at(AT_FDCWD, oldname, 0, &old_path); 4431bd50873dSTao Ma if (error) { 4432bd50873dSTao Ma mlog_errno(error); 4433bd50873dSTao Ma return error; 4434bd50873dSTao Ma } 4435bd50873dSTao Ma 4436dae6ad8fSAl Viro new_dentry = user_path_create(AT_FDCWD, newname, &new_path, 0); 4437dae6ad8fSAl Viro error = PTR_ERR(new_dentry); 4438dae6ad8fSAl Viro if (IS_ERR(new_dentry)) { 4439bd50873dSTao Ma mlog_errno(error); 4440bd50873dSTao Ma goto out; 4441bd50873dSTao Ma } 4442bd50873dSTao Ma 4443bd50873dSTao Ma error = -EXDEV; 4444dae6ad8fSAl Viro if (old_path.mnt != new_path.mnt) { 4445bd50873dSTao Ma mlog_errno(error); 4446dae6ad8fSAl Viro goto out_dput; 4447bd50873dSTao Ma } 4448bd50873dSTao Ma 4449bd50873dSTao Ma error = ocfs2_vfs_reflink(old_path.dentry, 44502b0143b5SDavid Howells d_inode(new_path.dentry), 4451bd50873dSTao Ma new_dentry, preserve); 4452bd50873dSTao Ma out_dput: 4453921a1650SAl Viro done_path_create(&new_path, new_dentry); 4454bd50873dSTao Ma out: 4455bd50873dSTao Ma path_put(&old_path); 4456bd50873dSTao Ma 4457bd50873dSTao Ma return error; 4458bd50873dSTao Ma } 445929ac8e85SDarrick J. Wong 446029ac8e85SDarrick J. Wong /* Update destination inode size, if necessary. */ 446165f098e9SDarrick J. Wong int ocfs2_reflink_update_dest(struct inode *dest, 446229ac8e85SDarrick J. Wong struct buffer_head *d_bh, 446329ac8e85SDarrick J. Wong loff_t newlen) 446429ac8e85SDarrick J. Wong { 446529ac8e85SDarrick J. Wong handle_t *handle; 446629ac8e85SDarrick J. Wong int ret; 446729ac8e85SDarrick J. Wong 446829ac8e85SDarrick J. Wong dest->i_blocks = ocfs2_inode_sector_count(dest); 446929ac8e85SDarrick J. Wong 447029ac8e85SDarrick J. Wong if (newlen <= i_size_read(dest)) 447129ac8e85SDarrick J. Wong return 0; 447229ac8e85SDarrick J. Wong 447329ac8e85SDarrick J. Wong handle = ocfs2_start_trans(OCFS2_SB(dest->i_sb), 447429ac8e85SDarrick J. Wong OCFS2_INODE_UPDATE_CREDITS); 447529ac8e85SDarrick J. Wong if (IS_ERR(handle)) { 447629ac8e85SDarrick J. Wong ret = PTR_ERR(handle); 447729ac8e85SDarrick J. Wong mlog_errno(ret); 447829ac8e85SDarrick J. Wong return ret; 447929ac8e85SDarrick J. Wong } 448029ac8e85SDarrick J. Wong 448129ac8e85SDarrick J. Wong /* Extend i_size if needed. */ 448229ac8e85SDarrick J. Wong spin_lock(&OCFS2_I(dest)->ip_lock); 448329ac8e85SDarrick J. Wong if (newlen > i_size_read(dest)) 448429ac8e85SDarrick J. Wong i_size_write(dest, newlen); 448529ac8e85SDarrick J. Wong spin_unlock(&OCFS2_I(dest)->ip_lock); 448629ac8e85SDarrick J. Wong dest->i_ctime = dest->i_mtime = current_time(dest); 448729ac8e85SDarrick J. Wong 448829ac8e85SDarrick J. Wong ret = ocfs2_mark_inode_dirty(handle, dest, d_bh); 448929ac8e85SDarrick J. Wong if (ret) { 449029ac8e85SDarrick J. Wong mlog_errno(ret); 449129ac8e85SDarrick J. Wong goto out_commit; 449229ac8e85SDarrick J. Wong } 449329ac8e85SDarrick J. Wong 449429ac8e85SDarrick J. Wong out_commit: 449529ac8e85SDarrick J. Wong ocfs2_commit_trans(OCFS2_SB(dest->i_sb), handle); 449629ac8e85SDarrick J. Wong return ret; 449729ac8e85SDarrick J. Wong } 449829ac8e85SDarrick J. Wong 449929ac8e85SDarrick J. Wong /* Remap the range pos_in:len in s_inode to pos_out:len in t_inode. */ 4500900611a1SDarrick J. Wong static loff_t ocfs2_reflink_remap_extent(struct inode *s_inode, 450129ac8e85SDarrick J. Wong struct buffer_head *s_bh, 450229ac8e85SDarrick J. Wong loff_t pos_in, 450329ac8e85SDarrick J. Wong struct inode *t_inode, 450429ac8e85SDarrick J. Wong struct buffer_head *t_bh, 450529ac8e85SDarrick J. Wong loff_t pos_out, 450629ac8e85SDarrick J. Wong loff_t len, 450729ac8e85SDarrick J. Wong struct ocfs2_cached_dealloc_ctxt *dealloc) 450829ac8e85SDarrick J. Wong { 450929ac8e85SDarrick J. Wong struct ocfs2_extent_tree s_et; 451029ac8e85SDarrick J. Wong struct ocfs2_extent_tree t_et; 451129ac8e85SDarrick J. Wong struct ocfs2_dinode *dis; 451229ac8e85SDarrick J. Wong struct buffer_head *ref_root_bh = NULL; 451329ac8e85SDarrick J. Wong struct ocfs2_refcount_tree *ref_tree; 451429ac8e85SDarrick J. Wong struct ocfs2_super *osb; 4515900611a1SDarrick J. Wong loff_t remapped_bytes = 0; 451629ac8e85SDarrick J. Wong loff_t pstart, plen; 4517900611a1SDarrick J. Wong u32 p_cluster, num_clusters, slast, spos, tpos, remapped_clus = 0; 451829ac8e85SDarrick J. Wong unsigned int ext_flags; 451929ac8e85SDarrick J. Wong int ret = 0; 452029ac8e85SDarrick J. Wong 452129ac8e85SDarrick J. Wong osb = OCFS2_SB(s_inode->i_sb); 452229ac8e85SDarrick J. Wong dis = (struct ocfs2_dinode *)s_bh->b_data; 452329ac8e85SDarrick J. Wong ocfs2_init_dinode_extent_tree(&s_et, INODE_CACHE(s_inode), s_bh); 452429ac8e85SDarrick J. Wong ocfs2_init_dinode_extent_tree(&t_et, INODE_CACHE(t_inode), t_bh); 452529ac8e85SDarrick J. Wong 452629ac8e85SDarrick J. Wong spos = ocfs2_bytes_to_clusters(s_inode->i_sb, pos_in); 452729ac8e85SDarrick J. Wong tpos = ocfs2_bytes_to_clusters(t_inode->i_sb, pos_out); 452829ac8e85SDarrick J. Wong slast = ocfs2_clusters_for_bytes(s_inode->i_sb, pos_in + len); 452929ac8e85SDarrick J. Wong 453029ac8e85SDarrick J. Wong while (spos < slast) { 453129ac8e85SDarrick J. Wong if (fatal_signal_pending(current)) { 453229ac8e85SDarrick J. Wong ret = -EINTR; 453329ac8e85SDarrick J. Wong goto out; 453429ac8e85SDarrick J. Wong } 453529ac8e85SDarrick J. Wong 453629ac8e85SDarrick J. Wong /* Look up the extent. */ 453729ac8e85SDarrick J. Wong ret = ocfs2_get_clusters(s_inode, spos, &p_cluster, 453829ac8e85SDarrick J. Wong &num_clusters, &ext_flags); 453929ac8e85SDarrick J. Wong if (ret) { 454029ac8e85SDarrick J. Wong mlog_errno(ret); 454129ac8e85SDarrick J. Wong goto out; 454229ac8e85SDarrick J. Wong } 454329ac8e85SDarrick J. Wong 454429ac8e85SDarrick J. Wong num_clusters = min_t(u32, num_clusters, slast - spos); 454529ac8e85SDarrick J. Wong 454629ac8e85SDarrick J. Wong /* Punch out the dest range. */ 454729ac8e85SDarrick J. Wong pstart = ocfs2_clusters_to_bytes(t_inode->i_sb, tpos); 454829ac8e85SDarrick J. Wong plen = ocfs2_clusters_to_bytes(t_inode->i_sb, num_clusters); 454929ac8e85SDarrick J. Wong ret = ocfs2_remove_inode_range(t_inode, t_bh, pstart, plen); 455029ac8e85SDarrick J. Wong if (ret) { 455129ac8e85SDarrick J. Wong mlog_errno(ret); 455229ac8e85SDarrick J. Wong goto out; 455329ac8e85SDarrick J. Wong } 455429ac8e85SDarrick J. Wong 455529ac8e85SDarrick J. Wong if (p_cluster == 0) 455629ac8e85SDarrick J. Wong goto next_loop; 455729ac8e85SDarrick J. Wong 455829ac8e85SDarrick J. Wong /* Lock the refcount btree... */ 455929ac8e85SDarrick J. Wong ret = ocfs2_lock_refcount_tree(osb, 456029ac8e85SDarrick J. Wong le64_to_cpu(dis->i_refcount_loc), 456129ac8e85SDarrick J. Wong 1, &ref_tree, &ref_root_bh); 456229ac8e85SDarrick J. Wong if (ret) { 456329ac8e85SDarrick J. Wong mlog_errno(ret); 456429ac8e85SDarrick J. Wong goto out; 456529ac8e85SDarrick J. Wong } 456629ac8e85SDarrick J. Wong 456729ac8e85SDarrick J. Wong /* Mark s_inode's extent as refcounted. */ 456829ac8e85SDarrick J. Wong if (!(ext_flags & OCFS2_EXT_REFCOUNTED)) { 456929ac8e85SDarrick J. Wong ret = ocfs2_add_refcount_flag(s_inode, &s_et, 457029ac8e85SDarrick J. Wong &ref_tree->rf_ci, 457129ac8e85SDarrick J. Wong ref_root_bh, spos, 457229ac8e85SDarrick J. Wong p_cluster, num_clusters, 457329ac8e85SDarrick J. Wong dealloc, NULL); 457429ac8e85SDarrick J. Wong if (ret) { 457529ac8e85SDarrick J. Wong mlog_errno(ret); 457629ac8e85SDarrick J. Wong goto out_unlock_refcount; 457729ac8e85SDarrick J. Wong } 457829ac8e85SDarrick J. Wong } 457929ac8e85SDarrick J. Wong 458029ac8e85SDarrick J. Wong /* Map in the new extent. */ 458129ac8e85SDarrick J. Wong ext_flags |= OCFS2_EXT_REFCOUNTED; 458229ac8e85SDarrick J. Wong ret = ocfs2_add_refcounted_extent(t_inode, &t_et, 458329ac8e85SDarrick J. Wong &ref_tree->rf_ci, 458429ac8e85SDarrick J. Wong ref_root_bh, 458529ac8e85SDarrick J. Wong tpos, p_cluster, 458629ac8e85SDarrick J. Wong num_clusters, 458729ac8e85SDarrick J. Wong ext_flags, 458829ac8e85SDarrick J. Wong dealloc); 458929ac8e85SDarrick J. Wong if (ret) { 459029ac8e85SDarrick J. Wong mlog_errno(ret); 459129ac8e85SDarrick J. Wong goto out_unlock_refcount; 459229ac8e85SDarrick J. Wong } 459329ac8e85SDarrick J. Wong 459429ac8e85SDarrick J. Wong ocfs2_unlock_refcount_tree(osb, ref_tree, 1); 459529ac8e85SDarrick J. Wong brelse(ref_root_bh); 459629ac8e85SDarrick J. Wong next_loop: 459729ac8e85SDarrick J. Wong spos += num_clusters; 459829ac8e85SDarrick J. Wong tpos += num_clusters; 4599900611a1SDarrick J. Wong remapped_clus += num_clusters; 460029ac8e85SDarrick J. Wong } 460129ac8e85SDarrick J. Wong 4602900611a1SDarrick J. Wong goto out; 460329ac8e85SDarrick J. Wong out_unlock_refcount: 460429ac8e85SDarrick J. Wong ocfs2_unlock_refcount_tree(osb, ref_tree, 1); 460529ac8e85SDarrick J. Wong brelse(ref_root_bh); 4606900611a1SDarrick J. Wong out: 4607900611a1SDarrick J. Wong remapped_bytes = ocfs2_clusters_to_bytes(t_inode->i_sb, remapped_clus); 4608900611a1SDarrick J. Wong remapped_bytes = min_t(loff_t, len, remapped_bytes); 4609900611a1SDarrick J. Wong 4610900611a1SDarrick J. Wong return remapped_bytes > 0 ? remapped_bytes : ret; 461129ac8e85SDarrick J. Wong } 461229ac8e85SDarrick J. Wong 461329ac8e85SDarrick J. Wong /* Set up refcount tree and remap s_inode to t_inode. */ 461465f098e9SDarrick J. Wong loff_t ocfs2_reflink_remap_blocks(struct inode *s_inode, 461529ac8e85SDarrick J. Wong struct buffer_head *s_bh, 461629ac8e85SDarrick J. Wong loff_t pos_in, 461729ac8e85SDarrick J. Wong struct inode *t_inode, 461829ac8e85SDarrick J. Wong struct buffer_head *t_bh, 461929ac8e85SDarrick J. Wong loff_t pos_out, 462029ac8e85SDarrick J. Wong loff_t len) 462129ac8e85SDarrick J. Wong { 462229ac8e85SDarrick J. Wong struct ocfs2_cached_dealloc_ctxt dealloc; 462329ac8e85SDarrick J. Wong struct ocfs2_super *osb; 462429ac8e85SDarrick J. Wong struct ocfs2_dinode *dis; 462529ac8e85SDarrick J. Wong struct ocfs2_dinode *dit; 4626900611a1SDarrick J. Wong loff_t ret; 462729ac8e85SDarrick J. Wong 462829ac8e85SDarrick J. Wong osb = OCFS2_SB(s_inode->i_sb); 462929ac8e85SDarrick J. Wong dis = (struct ocfs2_dinode *)s_bh->b_data; 463029ac8e85SDarrick J. Wong dit = (struct ocfs2_dinode *)t_bh->b_data; 463129ac8e85SDarrick J. Wong ocfs2_init_dealloc_ctxt(&dealloc); 463229ac8e85SDarrick J. Wong 463329ac8e85SDarrick J. Wong /* 463429ac8e85SDarrick J. Wong * If we're reflinking the entire file and the source is inline 463529ac8e85SDarrick J. Wong * data, just copy the contents. 463629ac8e85SDarrick J. Wong */ 463729ac8e85SDarrick J. Wong if (pos_in == pos_out && pos_in == 0 && len == i_size_read(s_inode) && 463829ac8e85SDarrick J. Wong i_size_read(t_inode) <= len && 463929ac8e85SDarrick J. Wong (OCFS2_I(s_inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL)) { 464029ac8e85SDarrick J. Wong ret = ocfs2_duplicate_inline_data(s_inode, s_bh, t_inode, t_bh); 464129ac8e85SDarrick J. Wong if (ret) 464229ac8e85SDarrick J. Wong mlog_errno(ret); 464329ac8e85SDarrick J. Wong goto out; 464429ac8e85SDarrick J. Wong } 464529ac8e85SDarrick J. Wong 464629ac8e85SDarrick J. Wong /* 464729ac8e85SDarrick J. Wong * If both inodes belong to two different refcount groups then 464829ac8e85SDarrick J. Wong * forget it because we don't know how (or want) to go merging 464929ac8e85SDarrick J. Wong * refcount trees. 465029ac8e85SDarrick J. Wong */ 465129ac8e85SDarrick J. Wong ret = -EOPNOTSUPP; 465229ac8e85SDarrick J. Wong if (ocfs2_is_refcount_inode(s_inode) && 465329ac8e85SDarrick J. Wong ocfs2_is_refcount_inode(t_inode) && 465429ac8e85SDarrick J. Wong le64_to_cpu(dis->i_refcount_loc) != 465529ac8e85SDarrick J. Wong le64_to_cpu(dit->i_refcount_loc)) 465629ac8e85SDarrick J. Wong goto out; 465729ac8e85SDarrick J. Wong 465829ac8e85SDarrick J. Wong /* Neither inode has a refcount tree. Add one to s_inode. */ 465929ac8e85SDarrick J. Wong if (!ocfs2_is_refcount_inode(s_inode) && 466029ac8e85SDarrick J. Wong !ocfs2_is_refcount_inode(t_inode)) { 466129ac8e85SDarrick J. Wong ret = ocfs2_create_refcount_tree(s_inode, s_bh); 466229ac8e85SDarrick J. Wong if (ret) { 466329ac8e85SDarrick J. Wong mlog_errno(ret); 466429ac8e85SDarrick J. Wong goto out; 466529ac8e85SDarrick J. Wong } 466629ac8e85SDarrick J. Wong } 466729ac8e85SDarrick J. Wong 466829ac8e85SDarrick J. Wong /* Ensure that both inodes end up with the same refcount tree. */ 466929ac8e85SDarrick J. Wong if (!ocfs2_is_refcount_inode(s_inode)) { 467029ac8e85SDarrick J. Wong ret = ocfs2_set_refcount_tree(s_inode, s_bh, 467129ac8e85SDarrick J. Wong le64_to_cpu(dit->i_refcount_loc)); 467229ac8e85SDarrick J. Wong if (ret) { 467329ac8e85SDarrick J. Wong mlog_errno(ret); 467429ac8e85SDarrick J. Wong goto out; 467529ac8e85SDarrick J. Wong } 467629ac8e85SDarrick J. Wong } 467729ac8e85SDarrick J. Wong if (!ocfs2_is_refcount_inode(t_inode)) { 467829ac8e85SDarrick J. Wong ret = ocfs2_set_refcount_tree(t_inode, t_bh, 467929ac8e85SDarrick J. Wong le64_to_cpu(dis->i_refcount_loc)); 468029ac8e85SDarrick J. Wong if (ret) { 468129ac8e85SDarrick J. Wong mlog_errno(ret); 468229ac8e85SDarrick J. Wong goto out; 468329ac8e85SDarrick J. Wong } 468429ac8e85SDarrick J. Wong } 468529ac8e85SDarrick J. Wong 468629ac8e85SDarrick J. Wong /* Turn off inline data in the dest file. */ 468729ac8e85SDarrick J. Wong if (OCFS2_I(t_inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { 468829ac8e85SDarrick J. Wong ret = ocfs2_convert_inline_data_to_extents(t_inode, t_bh); 468929ac8e85SDarrick J. Wong if (ret) { 469029ac8e85SDarrick J. Wong mlog_errno(ret); 469129ac8e85SDarrick J. Wong goto out; 469229ac8e85SDarrick J. Wong } 469329ac8e85SDarrick J. Wong } 469429ac8e85SDarrick J. Wong 469529ac8e85SDarrick J. Wong /* Actually remap extents now. */ 469629ac8e85SDarrick J. Wong ret = ocfs2_reflink_remap_extent(s_inode, s_bh, pos_in, t_inode, t_bh, 469729ac8e85SDarrick J. Wong pos_out, len, &dealloc); 4698900611a1SDarrick J. Wong if (ret < 0) { 469929ac8e85SDarrick J. Wong mlog_errno(ret); 470029ac8e85SDarrick J. Wong goto out; 470129ac8e85SDarrick J. Wong } 470229ac8e85SDarrick J. Wong 470329ac8e85SDarrick J. Wong out: 470429ac8e85SDarrick J. Wong if (ocfs2_dealloc_has_cluster(&dealloc)) { 470529ac8e85SDarrick J. Wong ocfs2_schedule_truncate_log_flush(osb, 1); 470629ac8e85SDarrick J. Wong ocfs2_run_deallocs(osb, &dealloc); 470729ac8e85SDarrick J. Wong } 470829ac8e85SDarrick J. Wong 470929ac8e85SDarrick J. Wong return ret; 471029ac8e85SDarrick J. Wong } 471129ac8e85SDarrick J. Wong 471229ac8e85SDarrick J. Wong /* Lock an inode and grab a bh pointing to the inode. */ 471365f098e9SDarrick J. Wong int ocfs2_reflink_inodes_lock(struct inode *s_inode, 4714e6a9467eSDarrick J. Wong struct buffer_head **bh_s, 471529ac8e85SDarrick J. Wong struct inode *t_inode, 4716e6a9467eSDarrick J. Wong struct buffer_head **bh_t) 471729ac8e85SDarrick J. Wong { 4718e6a9467eSDarrick J. Wong struct inode *inode1 = s_inode; 4719e6a9467eSDarrick J. Wong struct inode *inode2 = t_inode; 472029ac8e85SDarrick J. Wong struct ocfs2_inode_info *oi1; 472129ac8e85SDarrick J. Wong struct ocfs2_inode_info *oi2; 4722e6a9467eSDarrick J. Wong struct buffer_head *bh1 = NULL; 4723e6a9467eSDarrick J. Wong struct buffer_head *bh2 = NULL; 472429ac8e85SDarrick J. Wong bool same_inode = (s_inode == t_inode); 4725e6a9467eSDarrick J. Wong bool need_swap = (inode1->i_ino > inode2->i_ino); 472629ac8e85SDarrick J. Wong int status; 472729ac8e85SDarrick J. Wong 472829ac8e85SDarrick J. Wong /* First grab the VFS and rw locks. */ 472929ac8e85SDarrick J. Wong lock_two_nondirectories(s_inode, t_inode); 4730e6a9467eSDarrick J. Wong if (need_swap) 473129ac8e85SDarrick J. Wong swap(inode1, inode2); 473229ac8e85SDarrick J. Wong 473329ac8e85SDarrick J. Wong status = ocfs2_rw_lock(inode1, 1); 473429ac8e85SDarrick J. Wong if (status) { 473529ac8e85SDarrick J. Wong mlog_errno(status); 473629ac8e85SDarrick J. Wong goto out_i1; 473729ac8e85SDarrick J. Wong } 473829ac8e85SDarrick J. Wong if (!same_inode) { 473929ac8e85SDarrick J. Wong status = ocfs2_rw_lock(inode2, 1); 474029ac8e85SDarrick J. Wong if (status) { 474129ac8e85SDarrick J. Wong mlog_errno(status); 474229ac8e85SDarrick J. Wong goto out_i2; 474329ac8e85SDarrick J. Wong } 474429ac8e85SDarrick J. Wong } 474529ac8e85SDarrick J. Wong 474629ac8e85SDarrick J. Wong /* Now go for the cluster locks */ 474729ac8e85SDarrick J. Wong oi1 = OCFS2_I(inode1); 474829ac8e85SDarrick J. Wong oi2 = OCFS2_I(inode2); 474929ac8e85SDarrick J. Wong 475029ac8e85SDarrick J. Wong trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno, 475129ac8e85SDarrick J. Wong (unsigned long long)oi2->ip_blkno); 475229ac8e85SDarrick J. Wong 475329ac8e85SDarrick J. Wong /* We always want to lock the one with the lower lockid first. */ 475429ac8e85SDarrick J. Wong if (oi1->ip_blkno > oi2->ip_blkno) 475529ac8e85SDarrick J. Wong mlog_errno(-ENOLCK); 475629ac8e85SDarrick J. Wong 475729ac8e85SDarrick J. Wong /* lock id1 */ 4758e6a9467eSDarrick J. Wong status = ocfs2_inode_lock_nested(inode1, &bh1, 1, 4759e6a9467eSDarrick J. Wong OI_LS_REFLINK_TARGET); 476029ac8e85SDarrick J. Wong if (status < 0) { 476129ac8e85SDarrick J. Wong if (status != -ENOENT) 476229ac8e85SDarrick J. Wong mlog_errno(status); 476329ac8e85SDarrick J. Wong goto out_rw2; 476429ac8e85SDarrick J. Wong } 476529ac8e85SDarrick J. Wong 476629ac8e85SDarrick J. Wong /* lock id2 */ 476729ac8e85SDarrick J. Wong if (!same_inode) { 4768e6a9467eSDarrick J. Wong status = ocfs2_inode_lock_nested(inode2, &bh2, 1, 476929ac8e85SDarrick J. Wong OI_LS_REFLINK_TARGET); 477029ac8e85SDarrick J. Wong if (status < 0) { 477129ac8e85SDarrick J. Wong if (status != -ENOENT) 477229ac8e85SDarrick J. Wong mlog_errno(status); 477329ac8e85SDarrick J. Wong goto out_cl1; 477429ac8e85SDarrick J. Wong } 4775e6a9467eSDarrick J. Wong } else { 4776e6a9467eSDarrick J. Wong bh2 = bh1; 4777e6a9467eSDarrick J. Wong } 4778e6a9467eSDarrick J. Wong 4779e6a9467eSDarrick J. Wong /* 4780e6a9467eSDarrick J. Wong * If we swapped inode order above, we have to swap the buffer heads 4781e6a9467eSDarrick J. Wong * before passing them back to the caller. 4782e6a9467eSDarrick J. Wong */ 4783e6a9467eSDarrick J. Wong if (need_swap) 4784e6a9467eSDarrick J. Wong swap(bh1, bh2); 4785e6a9467eSDarrick J. Wong *bh_s = bh1; 4786e6a9467eSDarrick J. Wong *bh_t = bh2; 478729ac8e85SDarrick J. Wong 478829ac8e85SDarrick J. Wong trace_ocfs2_double_lock_end( 4789d324cd4cSpiaojun (unsigned long long)oi1->ip_blkno, 4790d324cd4cSpiaojun (unsigned long long)oi2->ip_blkno); 479129ac8e85SDarrick J. Wong 479229ac8e85SDarrick J. Wong return 0; 479329ac8e85SDarrick J. Wong 479429ac8e85SDarrick J. Wong out_cl1: 479529ac8e85SDarrick J. Wong ocfs2_inode_unlock(inode1, 1); 4796e6a9467eSDarrick J. Wong brelse(bh1); 479729ac8e85SDarrick J. Wong out_rw2: 479829ac8e85SDarrick J. Wong ocfs2_rw_unlock(inode2, 1); 479929ac8e85SDarrick J. Wong out_i2: 480029ac8e85SDarrick J. Wong ocfs2_rw_unlock(inode1, 1); 480129ac8e85SDarrick J. Wong out_i1: 480229ac8e85SDarrick J. Wong unlock_two_nondirectories(s_inode, t_inode); 480329ac8e85SDarrick J. Wong return status; 480429ac8e85SDarrick J. Wong } 480529ac8e85SDarrick J. Wong 480629ac8e85SDarrick J. Wong /* Unlock both inodes and release buffers. */ 480765f098e9SDarrick J. Wong void ocfs2_reflink_inodes_unlock(struct inode *s_inode, 480829ac8e85SDarrick J. Wong struct buffer_head *s_bh, 480929ac8e85SDarrick J. Wong struct inode *t_inode, 481029ac8e85SDarrick J. Wong struct buffer_head *t_bh) 481129ac8e85SDarrick J. Wong { 481229ac8e85SDarrick J. Wong ocfs2_inode_unlock(s_inode, 1); 481329ac8e85SDarrick J. Wong ocfs2_rw_unlock(s_inode, 1); 481429ac8e85SDarrick J. Wong brelse(s_bh); 481529ac8e85SDarrick J. Wong if (s_inode != t_inode) { 481629ac8e85SDarrick J. Wong ocfs2_inode_unlock(t_inode, 1); 481729ac8e85SDarrick J. Wong ocfs2_rw_unlock(t_inode, 1); 481829ac8e85SDarrick J. Wong brelse(t_bh); 481929ac8e85SDarrick J. Wong } 482029ac8e85SDarrick J. Wong unlock_two_nondirectories(s_inode, t_inode); 482129ac8e85SDarrick J. Wong } 4822