10a8165d7SJaegeuk Kim /* 2e05df3b1SJaegeuk Kim * fs/f2fs/node.c 3e05df3b1SJaegeuk Kim * 4e05df3b1SJaegeuk Kim * Copyright (c) 2012 Samsung Electronics Co., Ltd. 5e05df3b1SJaegeuk Kim * http://www.samsung.com/ 6e05df3b1SJaegeuk Kim * 7e05df3b1SJaegeuk Kim * This program is free software; you can redistribute it and/or modify 8e05df3b1SJaegeuk Kim * it under the terms of the GNU General Public License version 2 as 9e05df3b1SJaegeuk Kim * published by the Free Software Foundation. 10e05df3b1SJaegeuk Kim */ 11e05df3b1SJaegeuk Kim #include <linux/fs.h> 12e05df3b1SJaegeuk Kim #include <linux/f2fs_fs.h> 13e05df3b1SJaegeuk Kim #include <linux/mpage.h> 14e05df3b1SJaegeuk Kim #include <linux/backing-dev.h> 15e05df3b1SJaegeuk Kim #include <linux/blkdev.h> 16e05df3b1SJaegeuk Kim #include <linux/pagevec.h> 17e05df3b1SJaegeuk Kim #include <linux/swap.h> 18e05df3b1SJaegeuk Kim 19e05df3b1SJaegeuk Kim #include "f2fs.h" 20e05df3b1SJaegeuk Kim #include "node.h" 21e05df3b1SJaegeuk Kim #include "segment.h" 2251dd6249SNamjae Jeon #include <trace/events/f2fs.h> 23e05df3b1SJaegeuk Kim 24f978f5a0SGu Zheng #define on_build_free_nids(nmi) mutex_is_locked(&nm_i->build_lock) 25f978f5a0SGu Zheng 26e05df3b1SJaegeuk Kim static struct kmem_cache *nat_entry_slab; 27e05df3b1SJaegeuk Kim static struct kmem_cache *free_nid_slab; 28aec71382SChao Yu static struct kmem_cache *nat_entry_set_slab; 29e05df3b1SJaegeuk Kim 306fb03f3aSJaegeuk Kim bool available_free_memory(struct f2fs_sb_info *sbi, int type) 31cdfc41c1SJaegeuk Kim { 326fb03f3aSJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 33cdfc41c1SJaegeuk Kim struct sysinfo val; 34e5e7ea3cSJaegeuk Kim unsigned long avail_ram; 35cdfc41c1SJaegeuk Kim unsigned long mem_size = 0; 366fb03f3aSJaegeuk Kim bool res = false; 37cdfc41c1SJaegeuk Kim 38cdfc41c1SJaegeuk Kim si_meminfo(&val); 39e5e7ea3cSJaegeuk Kim 40e5e7ea3cSJaegeuk Kim /* only uses low memory */ 41e5e7ea3cSJaegeuk Kim avail_ram = val.totalram - val.totalhigh; 42e5e7ea3cSJaegeuk Kim 43e5e7ea3cSJaegeuk Kim /* give 25%, 25%, 50%, 50% memory for each components respectively */ 446fb03f3aSJaegeuk Kim if (type == FREE_NIDS) { 45e5e7ea3cSJaegeuk Kim mem_size = (nm_i->fcnt * sizeof(struct free_nid)) >> 46e5e7ea3cSJaegeuk Kim PAGE_CACHE_SHIFT; 47e5e7ea3cSJaegeuk Kim res = mem_size < ((avail_ram * nm_i->ram_thresh / 100) >> 2); 486fb03f3aSJaegeuk Kim } else if (type == NAT_ENTRIES) { 49e5e7ea3cSJaegeuk Kim mem_size = (nm_i->nat_cnt * sizeof(struct nat_entry)) >> 50e5e7ea3cSJaegeuk Kim PAGE_CACHE_SHIFT; 51e5e7ea3cSJaegeuk Kim res = mem_size < ((avail_ram * nm_i->ram_thresh / 100) >> 2); 526fb03f3aSJaegeuk Kim } else if (type == DIRTY_DENTS) { 532743f865SJaegeuk Kim if (sbi->sb->s_bdi->dirty_exceeded) 542743f865SJaegeuk Kim return false; 556fb03f3aSJaegeuk Kim mem_size = get_pages(sbi, F2FS_DIRTY_DENTS); 56e5e7ea3cSJaegeuk Kim res = mem_size < ((avail_ram * nm_i->ram_thresh / 100) >> 1); 57e5e7ea3cSJaegeuk Kim } else if (type == INO_ENTRIES) { 58e5e7ea3cSJaegeuk Kim int i; 59e5e7ea3cSJaegeuk Kim 60e5e7ea3cSJaegeuk Kim for (i = 0; i <= UPDATE_INO; i++) 6167298804SChao Yu mem_size += (sbi->im[i].ino_num * 6267298804SChao Yu sizeof(struct ino_entry)) >> PAGE_CACHE_SHIFT; 63e5e7ea3cSJaegeuk Kim res = mem_size < ((avail_ram * nm_i->ram_thresh / 100) >> 1); 641e84371fSJaegeuk Kim } else { 651e84371fSJaegeuk Kim if (sbi->sb->s_bdi->dirty_exceeded) 661e84371fSJaegeuk Kim return false; 676fb03f3aSJaegeuk Kim } 686fb03f3aSJaegeuk Kim return res; 69cdfc41c1SJaegeuk Kim } 70cdfc41c1SJaegeuk Kim 71e05df3b1SJaegeuk Kim static void clear_node_page_dirty(struct page *page) 72e05df3b1SJaegeuk Kim { 73e05df3b1SJaegeuk Kim struct address_space *mapping = page->mapping; 74e05df3b1SJaegeuk Kim unsigned int long flags; 75e05df3b1SJaegeuk Kim 76e05df3b1SJaegeuk Kim if (PageDirty(page)) { 77e05df3b1SJaegeuk Kim spin_lock_irqsave(&mapping->tree_lock, flags); 78e05df3b1SJaegeuk Kim radix_tree_tag_clear(&mapping->page_tree, 79e05df3b1SJaegeuk Kim page_index(page), 80e05df3b1SJaegeuk Kim PAGECACHE_TAG_DIRTY); 81e05df3b1SJaegeuk Kim spin_unlock_irqrestore(&mapping->tree_lock, flags); 82e05df3b1SJaegeuk Kim 83e05df3b1SJaegeuk Kim clear_page_dirty_for_io(page); 844081363fSJaegeuk Kim dec_page_count(F2FS_M_SB(mapping), F2FS_DIRTY_NODES); 85e05df3b1SJaegeuk Kim } 86e05df3b1SJaegeuk Kim ClearPageUptodate(page); 87e05df3b1SJaegeuk Kim } 88e05df3b1SJaegeuk Kim 89e05df3b1SJaegeuk Kim static struct page *get_current_nat_page(struct f2fs_sb_info *sbi, nid_t nid) 90e05df3b1SJaegeuk Kim { 91e05df3b1SJaegeuk Kim pgoff_t index = current_nat_addr(sbi, nid); 92e05df3b1SJaegeuk Kim return get_meta_page(sbi, index); 93e05df3b1SJaegeuk Kim } 94e05df3b1SJaegeuk Kim 95e05df3b1SJaegeuk Kim static struct page *get_next_nat_page(struct f2fs_sb_info *sbi, nid_t nid) 96e05df3b1SJaegeuk Kim { 97e05df3b1SJaegeuk Kim struct page *src_page; 98e05df3b1SJaegeuk Kim struct page *dst_page; 99e05df3b1SJaegeuk Kim pgoff_t src_off; 100e05df3b1SJaegeuk Kim pgoff_t dst_off; 101e05df3b1SJaegeuk Kim void *src_addr; 102e05df3b1SJaegeuk Kim void *dst_addr; 103e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 104e05df3b1SJaegeuk Kim 105e05df3b1SJaegeuk Kim src_off = current_nat_addr(sbi, nid); 106e05df3b1SJaegeuk Kim dst_off = next_nat_addr(sbi, src_off); 107e05df3b1SJaegeuk Kim 108e05df3b1SJaegeuk Kim /* get current nat block page with lock */ 109e05df3b1SJaegeuk Kim src_page = get_meta_page(sbi, src_off); 110e05df3b1SJaegeuk Kim dst_page = grab_meta_page(sbi, dst_off); 1119850cf4aSJaegeuk Kim f2fs_bug_on(sbi, PageDirty(src_page)); 112e05df3b1SJaegeuk Kim 113e05df3b1SJaegeuk Kim src_addr = page_address(src_page); 114e05df3b1SJaegeuk Kim dst_addr = page_address(dst_page); 115e05df3b1SJaegeuk Kim memcpy(dst_addr, src_addr, PAGE_CACHE_SIZE); 116e05df3b1SJaegeuk Kim set_page_dirty(dst_page); 117e05df3b1SJaegeuk Kim f2fs_put_page(src_page, 1); 118e05df3b1SJaegeuk Kim 119e05df3b1SJaegeuk Kim set_to_next_nat(nm_i, nid); 120e05df3b1SJaegeuk Kim 121e05df3b1SJaegeuk Kim return dst_page; 122e05df3b1SJaegeuk Kim } 123e05df3b1SJaegeuk Kim 124e05df3b1SJaegeuk Kim static struct nat_entry *__lookup_nat_cache(struct f2fs_nm_info *nm_i, nid_t n) 125e05df3b1SJaegeuk Kim { 126e05df3b1SJaegeuk Kim return radix_tree_lookup(&nm_i->nat_root, n); 127e05df3b1SJaegeuk Kim } 128e05df3b1SJaegeuk Kim 129e05df3b1SJaegeuk Kim static unsigned int __gang_lookup_nat_cache(struct f2fs_nm_info *nm_i, 130e05df3b1SJaegeuk Kim nid_t start, unsigned int nr, struct nat_entry **ep) 131e05df3b1SJaegeuk Kim { 132e05df3b1SJaegeuk Kim return radix_tree_gang_lookup(&nm_i->nat_root, (void **)ep, start, nr); 133e05df3b1SJaegeuk Kim } 134e05df3b1SJaegeuk Kim 135e05df3b1SJaegeuk Kim static void __del_from_nat_cache(struct f2fs_nm_info *nm_i, struct nat_entry *e) 136e05df3b1SJaegeuk Kim { 137e05df3b1SJaegeuk Kim list_del(&e->list); 138e05df3b1SJaegeuk Kim radix_tree_delete(&nm_i->nat_root, nat_get_nid(e)); 139e05df3b1SJaegeuk Kim nm_i->nat_cnt--; 140e05df3b1SJaegeuk Kim kmem_cache_free(nat_entry_slab, e); 141e05df3b1SJaegeuk Kim } 142e05df3b1SJaegeuk Kim 143309cc2b6SJaegeuk Kim static void __set_nat_cache_dirty(struct f2fs_nm_info *nm_i, 144309cc2b6SJaegeuk Kim struct nat_entry *ne) 145309cc2b6SJaegeuk Kim { 146309cc2b6SJaegeuk Kim nid_t set = NAT_BLOCK_OFFSET(ne->ni.nid); 147309cc2b6SJaegeuk Kim struct nat_entry_set *head; 148309cc2b6SJaegeuk Kim 149309cc2b6SJaegeuk Kim if (get_nat_flag(ne, IS_DIRTY)) 150309cc2b6SJaegeuk Kim return; 1519be32d72SJaegeuk Kim 152309cc2b6SJaegeuk Kim head = radix_tree_lookup(&nm_i->nat_set_root, set); 153309cc2b6SJaegeuk Kim if (!head) { 154309cc2b6SJaegeuk Kim head = f2fs_kmem_cache_alloc(nat_entry_set_slab, GFP_ATOMIC); 155309cc2b6SJaegeuk Kim 156309cc2b6SJaegeuk Kim INIT_LIST_HEAD(&head->entry_list); 157309cc2b6SJaegeuk Kim INIT_LIST_HEAD(&head->set_list); 158309cc2b6SJaegeuk Kim head->set = set; 159309cc2b6SJaegeuk Kim head->entry_cnt = 0; 1609be32d72SJaegeuk Kim f2fs_radix_tree_insert(&nm_i->nat_set_root, set, head); 161309cc2b6SJaegeuk Kim } 162309cc2b6SJaegeuk Kim list_move_tail(&ne->list, &head->entry_list); 163309cc2b6SJaegeuk Kim nm_i->dirty_nat_cnt++; 164309cc2b6SJaegeuk Kim head->entry_cnt++; 165309cc2b6SJaegeuk Kim set_nat_flag(ne, IS_DIRTY, true); 166309cc2b6SJaegeuk Kim } 167309cc2b6SJaegeuk Kim 168309cc2b6SJaegeuk Kim static void __clear_nat_cache_dirty(struct f2fs_nm_info *nm_i, 169309cc2b6SJaegeuk Kim struct nat_entry *ne) 170309cc2b6SJaegeuk Kim { 17120d047c8SChangman Lee nid_t set = NAT_BLOCK_OFFSET(ne->ni.nid); 172309cc2b6SJaegeuk Kim struct nat_entry_set *head; 173309cc2b6SJaegeuk Kim 174309cc2b6SJaegeuk Kim head = radix_tree_lookup(&nm_i->nat_set_root, set); 175309cc2b6SJaegeuk Kim if (head) { 176309cc2b6SJaegeuk Kim list_move_tail(&ne->list, &nm_i->nat_entries); 177309cc2b6SJaegeuk Kim set_nat_flag(ne, IS_DIRTY, false); 178309cc2b6SJaegeuk Kim head->entry_cnt--; 179309cc2b6SJaegeuk Kim nm_i->dirty_nat_cnt--; 180309cc2b6SJaegeuk Kim } 181309cc2b6SJaegeuk Kim } 182309cc2b6SJaegeuk Kim 183309cc2b6SJaegeuk Kim static unsigned int __gang_lookup_nat_set(struct f2fs_nm_info *nm_i, 184309cc2b6SJaegeuk Kim nid_t start, unsigned int nr, struct nat_entry_set **ep) 185309cc2b6SJaegeuk Kim { 186309cc2b6SJaegeuk Kim return radix_tree_gang_lookup(&nm_i->nat_set_root, (void **)ep, 187309cc2b6SJaegeuk Kim start, nr); 188309cc2b6SJaegeuk Kim } 189309cc2b6SJaegeuk Kim 19088bd02c9SJaegeuk Kim bool is_checkpointed_node(struct f2fs_sb_info *sbi, nid_t nid) 191e05df3b1SJaegeuk Kim { 192e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 193e05df3b1SJaegeuk Kim struct nat_entry *e; 19488bd02c9SJaegeuk Kim bool is_cp = true; 195e05df3b1SJaegeuk Kim 1968b26ef98SJaegeuk Kim down_read(&nm_i->nat_tree_lock); 197e05df3b1SJaegeuk Kim e = __lookup_nat_cache(nm_i, nid); 1987ef35e3bSJaegeuk Kim if (e && !get_nat_flag(e, IS_CHECKPOINTED)) 19988bd02c9SJaegeuk Kim is_cp = false; 2008b26ef98SJaegeuk Kim up_read(&nm_i->nat_tree_lock); 201e05df3b1SJaegeuk Kim return is_cp; 202e05df3b1SJaegeuk Kim } 203e05df3b1SJaegeuk Kim 20488bd02c9SJaegeuk Kim bool has_fsynced_inode(struct f2fs_sb_info *sbi, nid_t ino) 205479f40c4SJaegeuk Kim { 206479f40c4SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 207479f40c4SJaegeuk Kim struct nat_entry *e; 20888bd02c9SJaegeuk Kim bool fsynced = false; 209479f40c4SJaegeuk Kim 2108b26ef98SJaegeuk Kim down_read(&nm_i->nat_tree_lock); 21188bd02c9SJaegeuk Kim e = __lookup_nat_cache(nm_i, ino); 21288bd02c9SJaegeuk Kim if (e && get_nat_flag(e, HAS_FSYNCED_INODE)) 21388bd02c9SJaegeuk Kim fsynced = true; 2148b26ef98SJaegeuk Kim up_read(&nm_i->nat_tree_lock); 21588bd02c9SJaegeuk Kim return fsynced; 216479f40c4SJaegeuk Kim } 217479f40c4SJaegeuk Kim 21888bd02c9SJaegeuk Kim bool need_inode_block_update(struct f2fs_sb_info *sbi, nid_t ino) 219b6fe5873SJaegeuk Kim { 220b6fe5873SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 221b6fe5873SJaegeuk Kim struct nat_entry *e; 22288bd02c9SJaegeuk Kim bool need_update = true; 223b6fe5873SJaegeuk Kim 2248b26ef98SJaegeuk Kim down_read(&nm_i->nat_tree_lock); 22588bd02c9SJaegeuk Kim e = __lookup_nat_cache(nm_i, ino); 22688bd02c9SJaegeuk Kim if (e && get_nat_flag(e, HAS_LAST_FSYNC) && 22788bd02c9SJaegeuk Kim (get_nat_flag(e, IS_CHECKPOINTED) || 22888bd02c9SJaegeuk Kim get_nat_flag(e, HAS_FSYNCED_INODE))) 22988bd02c9SJaegeuk Kim need_update = false; 2308b26ef98SJaegeuk Kim up_read(&nm_i->nat_tree_lock); 23188bd02c9SJaegeuk Kim return need_update; 232b6fe5873SJaegeuk Kim } 233b6fe5873SJaegeuk Kim 234e05df3b1SJaegeuk Kim static struct nat_entry *grab_nat_entry(struct f2fs_nm_info *nm_i, nid_t nid) 235e05df3b1SJaegeuk Kim { 236e05df3b1SJaegeuk Kim struct nat_entry *new; 237e05df3b1SJaegeuk Kim 2389be32d72SJaegeuk Kim new = f2fs_kmem_cache_alloc(nat_entry_slab, GFP_ATOMIC); 2399be32d72SJaegeuk Kim f2fs_radix_tree_insert(&nm_i->nat_root, nid, new); 240e05df3b1SJaegeuk Kim memset(new, 0, sizeof(struct nat_entry)); 241e05df3b1SJaegeuk Kim nat_set_nid(new, nid); 24288bd02c9SJaegeuk Kim nat_reset_flag(new); 243e05df3b1SJaegeuk Kim list_add_tail(&new->list, &nm_i->nat_entries); 244e05df3b1SJaegeuk Kim nm_i->nat_cnt++; 245e05df3b1SJaegeuk Kim return new; 246e05df3b1SJaegeuk Kim } 247e05df3b1SJaegeuk Kim 248e05df3b1SJaegeuk Kim static void cache_nat_entry(struct f2fs_nm_info *nm_i, nid_t nid, 249e05df3b1SJaegeuk Kim struct f2fs_nat_entry *ne) 250e05df3b1SJaegeuk Kim { 251e05df3b1SJaegeuk Kim struct nat_entry *e; 2529be32d72SJaegeuk Kim 2538b26ef98SJaegeuk Kim down_write(&nm_i->nat_tree_lock); 254e05df3b1SJaegeuk Kim e = __lookup_nat_cache(nm_i, nid); 255e05df3b1SJaegeuk Kim if (!e) { 256e05df3b1SJaegeuk Kim e = grab_nat_entry(nm_i, nid); 25794dac22eSChao Yu node_info_from_raw_nat(&e->ni, ne); 258e05df3b1SJaegeuk Kim } 2598b26ef98SJaegeuk Kim up_write(&nm_i->nat_tree_lock); 260e05df3b1SJaegeuk Kim } 261e05df3b1SJaegeuk Kim 262e05df3b1SJaegeuk Kim static void set_node_addr(struct f2fs_sb_info *sbi, struct node_info *ni, 263479f40c4SJaegeuk Kim block_t new_blkaddr, bool fsync_done) 264e05df3b1SJaegeuk Kim { 265e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 266e05df3b1SJaegeuk Kim struct nat_entry *e; 2679be32d72SJaegeuk Kim 2688b26ef98SJaegeuk Kim down_write(&nm_i->nat_tree_lock); 269e05df3b1SJaegeuk Kim e = __lookup_nat_cache(nm_i, ni->nid); 270e05df3b1SJaegeuk Kim if (!e) { 271e05df3b1SJaegeuk Kim e = grab_nat_entry(nm_i, ni->nid); 2725c27f4eeSChao Yu copy_node_info(&e->ni, ni); 2739850cf4aSJaegeuk Kim f2fs_bug_on(sbi, ni->blk_addr == NEW_ADDR); 274e05df3b1SJaegeuk Kim } else if (new_blkaddr == NEW_ADDR) { 275e05df3b1SJaegeuk Kim /* 276e05df3b1SJaegeuk Kim * when nid is reallocated, 277e05df3b1SJaegeuk Kim * previous nat entry can be remained in nat cache. 278e05df3b1SJaegeuk Kim * So, reinitialize it with new information. 279e05df3b1SJaegeuk Kim */ 2805c27f4eeSChao Yu copy_node_info(&e->ni, ni); 2819850cf4aSJaegeuk Kim f2fs_bug_on(sbi, ni->blk_addr != NULL_ADDR); 282e05df3b1SJaegeuk Kim } 283e05df3b1SJaegeuk Kim 284e05df3b1SJaegeuk Kim /* sanity check */ 2859850cf4aSJaegeuk Kim f2fs_bug_on(sbi, nat_get_blkaddr(e) != ni->blk_addr); 2869850cf4aSJaegeuk Kim f2fs_bug_on(sbi, nat_get_blkaddr(e) == NULL_ADDR && 287e05df3b1SJaegeuk Kim new_blkaddr == NULL_ADDR); 2889850cf4aSJaegeuk Kim f2fs_bug_on(sbi, nat_get_blkaddr(e) == NEW_ADDR && 289e05df3b1SJaegeuk Kim new_blkaddr == NEW_ADDR); 2909850cf4aSJaegeuk Kim f2fs_bug_on(sbi, nat_get_blkaddr(e) != NEW_ADDR && 291e05df3b1SJaegeuk Kim nat_get_blkaddr(e) != NULL_ADDR && 292e05df3b1SJaegeuk Kim new_blkaddr == NEW_ADDR); 293e05df3b1SJaegeuk Kim 294e1c42045Sarter97 /* increment version no as node is removed */ 295e05df3b1SJaegeuk Kim if (nat_get_blkaddr(e) != NEW_ADDR && new_blkaddr == NULL_ADDR) { 296e05df3b1SJaegeuk Kim unsigned char version = nat_get_version(e); 297e05df3b1SJaegeuk Kim nat_set_version(e, inc_node_version(version)); 298e05df3b1SJaegeuk Kim } 299e05df3b1SJaegeuk Kim 300e05df3b1SJaegeuk Kim /* change address */ 301e05df3b1SJaegeuk Kim nat_set_blkaddr(e, new_blkaddr); 30288bd02c9SJaegeuk Kim if (new_blkaddr == NEW_ADDR || new_blkaddr == NULL_ADDR) 30388bd02c9SJaegeuk Kim set_nat_flag(e, IS_CHECKPOINTED, false); 304e05df3b1SJaegeuk Kim __set_nat_cache_dirty(nm_i, e); 305479f40c4SJaegeuk Kim 306479f40c4SJaegeuk Kim /* update fsync_mark if its inode nat entry is still alive */ 307479f40c4SJaegeuk Kim e = __lookup_nat_cache(nm_i, ni->ino); 30888bd02c9SJaegeuk Kim if (e) { 30988bd02c9SJaegeuk Kim if (fsync_done && ni->nid == ni->ino) 31088bd02c9SJaegeuk Kim set_nat_flag(e, HAS_FSYNCED_INODE, true); 31188bd02c9SJaegeuk Kim set_nat_flag(e, HAS_LAST_FSYNC, fsync_done); 31288bd02c9SJaegeuk Kim } 3138b26ef98SJaegeuk Kim up_write(&nm_i->nat_tree_lock); 314e05df3b1SJaegeuk Kim } 315e05df3b1SJaegeuk Kim 3164660f9c0SJaegeuk Kim int try_to_free_nats(struct f2fs_sb_info *sbi, int nr_shrink) 317e05df3b1SJaegeuk Kim { 318e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 319e05df3b1SJaegeuk Kim 3206fb03f3aSJaegeuk Kim if (available_free_memory(sbi, NAT_ENTRIES)) 321e05df3b1SJaegeuk Kim return 0; 322e05df3b1SJaegeuk Kim 3238b26ef98SJaegeuk Kim down_write(&nm_i->nat_tree_lock); 324e05df3b1SJaegeuk Kim while (nr_shrink && !list_empty(&nm_i->nat_entries)) { 325e05df3b1SJaegeuk Kim struct nat_entry *ne; 326e05df3b1SJaegeuk Kim ne = list_first_entry(&nm_i->nat_entries, 327e05df3b1SJaegeuk Kim struct nat_entry, list); 328e05df3b1SJaegeuk Kim __del_from_nat_cache(nm_i, ne); 329e05df3b1SJaegeuk Kim nr_shrink--; 330e05df3b1SJaegeuk Kim } 3318b26ef98SJaegeuk Kim up_write(&nm_i->nat_tree_lock); 332e05df3b1SJaegeuk Kim return nr_shrink; 333e05df3b1SJaegeuk Kim } 334e05df3b1SJaegeuk Kim 3350a8165d7SJaegeuk Kim /* 336e1c42045Sarter97 * This function always returns success 337e05df3b1SJaegeuk Kim */ 338e05df3b1SJaegeuk Kim void get_node_info(struct f2fs_sb_info *sbi, nid_t nid, struct node_info *ni) 339e05df3b1SJaegeuk Kim { 340e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 341e05df3b1SJaegeuk Kim struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); 342e05df3b1SJaegeuk Kim struct f2fs_summary_block *sum = curseg->sum_blk; 343e05df3b1SJaegeuk Kim nid_t start_nid = START_NID(nid); 344e05df3b1SJaegeuk Kim struct f2fs_nat_block *nat_blk; 345e05df3b1SJaegeuk Kim struct page *page = NULL; 346e05df3b1SJaegeuk Kim struct f2fs_nat_entry ne; 347e05df3b1SJaegeuk Kim struct nat_entry *e; 348e05df3b1SJaegeuk Kim int i; 349e05df3b1SJaegeuk Kim 350be4124f8SNamjae Jeon memset(&ne, 0, sizeof(struct f2fs_nat_entry)); 351e05df3b1SJaegeuk Kim ni->nid = nid; 352e05df3b1SJaegeuk Kim 353e05df3b1SJaegeuk Kim /* Check nat cache */ 3548b26ef98SJaegeuk Kim down_read(&nm_i->nat_tree_lock); 355e05df3b1SJaegeuk Kim e = __lookup_nat_cache(nm_i, nid); 356e05df3b1SJaegeuk Kim if (e) { 357e05df3b1SJaegeuk Kim ni->ino = nat_get_ino(e); 358e05df3b1SJaegeuk Kim ni->blk_addr = nat_get_blkaddr(e); 359e05df3b1SJaegeuk Kim ni->version = nat_get_version(e); 360e05df3b1SJaegeuk Kim } 3618b26ef98SJaegeuk Kim up_read(&nm_i->nat_tree_lock); 362e05df3b1SJaegeuk Kim if (e) 363e05df3b1SJaegeuk Kim return; 364e05df3b1SJaegeuk Kim 365e05df3b1SJaegeuk Kim /* Check current segment summary */ 366e05df3b1SJaegeuk Kim mutex_lock(&curseg->curseg_mutex); 367e05df3b1SJaegeuk Kim i = lookup_journal_in_cursum(sum, NAT_JOURNAL, nid, 0); 368e05df3b1SJaegeuk Kim if (i >= 0) { 369e05df3b1SJaegeuk Kim ne = nat_in_journal(sum, i); 370e05df3b1SJaegeuk Kim node_info_from_raw_nat(ni, &ne); 371e05df3b1SJaegeuk Kim } 372e05df3b1SJaegeuk Kim mutex_unlock(&curseg->curseg_mutex); 373e05df3b1SJaegeuk Kim if (i >= 0) 374e05df3b1SJaegeuk Kim goto cache; 375e05df3b1SJaegeuk Kim 376e05df3b1SJaegeuk Kim /* Fill node_info from nat page */ 377e05df3b1SJaegeuk Kim page = get_current_nat_page(sbi, start_nid); 378e05df3b1SJaegeuk Kim nat_blk = (struct f2fs_nat_block *)page_address(page); 379e05df3b1SJaegeuk Kim ne = nat_blk->entries[nid - start_nid]; 380e05df3b1SJaegeuk Kim node_info_from_raw_nat(ni, &ne); 381e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 382e05df3b1SJaegeuk Kim cache: 383e05df3b1SJaegeuk Kim /* cache nat entry */ 384e05df3b1SJaegeuk Kim cache_nat_entry(NM_I(sbi), nid, &ne); 385e05df3b1SJaegeuk Kim } 386e05df3b1SJaegeuk Kim 3870a8165d7SJaegeuk Kim /* 388e05df3b1SJaegeuk Kim * The maximum depth is four. 389e05df3b1SJaegeuk Kim * Offset[0] will have raw inode offset. 390e05df3b1SJaegeuk Kim */ 391de93653fSJaegeuk Kim static int get_node_path(struct f2fs_inode_info *fi, long block, 392de93653fSJaegeuk Kim int offset[4], unsigned int noffset[4]) 393e05df3b1SJaegeuk Kim { 394de93653fSJaegeuk Kim const long direct_index = ADDRS_PER_INODE(fi); 395e05df3b1SJaegeuk Kim const long direct_blks = ADDRS_PER_BLOCK; 396e05df3b1SJaegeuk Kim const long dptrs_per_blk = NIDS_PER_BLOCK; 397e05df3b1SJaegeuk Kim const long indirect_blks = ADDRS_PER_BLOCK * NIDS_PER_BLOCK; 398e05df3b1SJaegeuk Kim const long dindirect_blks = indirect_blks * NIDS_PER_BLOCK; 399e05df3b1SJaegeuk Kim int n = 0; 400e05df3b1SJaegeuk Kim int level = 0; 401e05df3b1SJaegeuk Kim 402e05df3b1SJaegeuk Kim noffset[0] = 0; 403e05df3b1SJaegeuk Kim 404e05df3b1SJaegeuk Kim if (block < direct_index) { 40525c0a6e5SNamjae Jeon offset[n] = block; 406e05df3b1SJaegeuk Kim goto got; 407e05df3b1SJaegeuk Kim } 408e05df3b1SJaegeuk Kim block -= direct_index; 409e05df3b1SJaegeuk Kim if (block < direct_blks) { 410e05df3b1SJaegeuk Kim offset[n++] = NODE_DIR1_BLOCK; 411e05df3b1SJaegeuk Kim noffset[n] = 1; 41225c0a6e5SNamjae Jeon offset[n] = block; 413e05df3b1SJaegeuk Kim level = 1; 414e05df3b1SJaegeuk Kim goto got; 415e05df3b1SJaegeuk Kim } 416e05df3b1SJaegeuk Kim block -= direct_blks; 417e05df3b1SJaegeuk Kim if (block < direct_blks) { 418e05df3b1SJaegeuk Kim offset[n++] = NODE_DIR2_BLOCK; 419e05df3b1SJaegeuk Kim noffset[n] = 2; 42025c0a6e5SNamjae Jeon offset[n] = block; 421e05df3b1SJaegeuk Kim level = 1; 422e05df3b1SJaegeuk Kim goto got; 423e05df3b1SJaegeuk Kim } 424e05df3b1SJaegeuk Kim block -= direct_blks; 425e05df3b1SJaegeuk Kim if (block < indirect_blks) { 426e05df3b1SJaegeuk Kim offset[n++] = NODE_IND1_BLOCK; 427e05df3b1SJaegeuk Kim noffset[n] = 3; 428e05df3b1SJaegeuk Kim offset[n++] = block / direct_blks; 429e05df3b1SJaegeuk Kim noffset[n] = 4 + offset[n - 1]; 43025c0a6e5SNamjae Jeon offset[n] = block % direct_blks; 431e05df3b1SJaegeuk Kim level = 2; 432e05df3b1SJaegeuk Kim goto got; 433e05df3b1SJaegeuk Kim } 434e05df3b1SJaegeuk Kim block -= indirect_blks; 435e05df3b1SJaegeuk Kim if (block < indirect_blks) { 436e05df3b1SJaegeuk Kim offset[n++] = NODE_IND2_BLOCK; 437e05df3b1SJaegeuk Kim noffset[n] = 4 + dptrs_per_blk; 438e05df3b1SJaegeuk Kim offset[n++] = block / direct_blks; 439e05df3b1SJaegeuk Kim noffset[n] = 5 + dptrs_per_blk + offset[n - 1]; 44025c0a6e5SNamjae Jeon offset[n] = block % direct_blks; 441e05df3b1SJaegeuk Kim level = 2; 442e05df3b1SJaegeuk Kim goto got; 443e05df3b1SJaegeuk Kim } 444e05df3b1SJaegeuk Kim block -= indirect_blks; 445e05df3b1SJaegeuk Kim if (block < dindirect_blks) { 446e05df3b1SJaegeuk Kim offset[n++] = NODE_DIND_BLOCK; 447e05df3b1SJaegeuk Kim noffset[n] = 5 + (dptrs_per_blk * 2); 448e05df3b1SJaegeuk Kim offset[n++] = block / indirect_blks; 449e05df3b1SJaegeuk Kim noffset[n] = 6 + (dptrs_per_blk * 2) + 450e05df3b1SJaegeuk Kim offset[n - 1] * (dptrs_per_blk + 1); 451e05df3b1SJaegeuk Kim offset[n++] = (block / direct_blks) % dptrs_per_blk; 452e05df3b1SJaegeuk Kim noffset[n] = 7 + (dptrs_per_blk * 2) + 453e05df3b1SJaegeuk Kim offset[n - 2] * (dptrs_per_blk + 1) + 454e05df3b1SJaegeuk Kim offset[n - 1]; 45525c0a6e5SNamjae Jeon offset[n] = block % direct_blks; 456e05df3b1SJaegeuk Kim level = 3; 457e05df3b1SJaegeuk Kim goto got; 458e05df3b1SJaegeuk Kim } else { 459e05df3b1SJaegeuk Kim BUG(); 460e05df3b1SJaegeuk Kim } 461e05df3b1SJaegeuk Kim got: 462e05df3b1SJaegeuk Kim return level; 463e05df3b1SJaegeuk Kim } 464e05df3b1SJaegeuk Kim 465e05df3b1SJaegeuk Kim /* 466e05df3b1SJaegeuk Kim * Caller should call f2fs_put_dnode(dn). 4674f4124d0SChao Yu * Also, it should grab and release a rwsem by calling f2fs_lock_op() and 4684f4124d0SChao Yu * f2fs_unlock_op() only if ro is not set RDONLY_NODE. 46939936837SJaegeuk Kim * In the case of RDONLY_NODE, we don't need to care about mutex. 470e05df3b1SJaegeuk Kim */ 471266e97a8SJaegeuk Kim int get_dnode_of_data(struct dnode_of_data *dn, pgoff_t index, int mode) 472e05df3b1SJaegeuk Kim { 4734081363fSJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); 474e05df3b1SJaegeuk Kim struct page *npage[4]; 475e05df3b1SJaegeuk Kim struct page *parent; 476e05df3b1SJaegeuk Kim int offset[4]; 477e05df3b1SJaegeuk Kim unsigned int noffset[4]; 478e05df3b1SJaegeuk Kim nid_t nids[4]; 479e05df3b1SJaegeuk Kim int level, i; 480e05df3b1SJaegeuk Kim int err = 0; 481e05df3b1SJaegeuk Kim 482de93653fSJaegeuk Kim level = get_node_path(F2FS_I(dn->inode), index, offset, noffset); 483e05df3b1SJaegeuk Kim 484e05df3b1SJaegeuk Kim nids[0] = dn->inode->i_ino; 4851646cfacSJaegeuk Kim npage[0] = dn->inode_page; 4861646cfacSJaegeuk Kim 4871646cfacSJaegeuk Kim if (!npage[0]) { 488e05df3b1SJaegeuk Kim npage[0] = get_node_page(sbi, nids[0]); 489e05df3b1SJaegeuk Kim if (IS_ERR(npage[0])) 490e05df3b1SJaegeuk Kim return PTR_ERR(npage[0]); 4911646cfacSJaegeuk Kim } 492e05df3b1SJaegeuk Kim parent = npage[0]; 49352c2db3fSChangman Lee if (level != 0) 494e05df3b1SJaegeuk Kim nids[1] = get_nid(parent, offset[0], true); 495e05df3b1SJaegeuk Kim dn->inode_page = npage[0]; 496e05df3b1SJaegeuk Kim dn->inode_page_locked = true; 497e05df3b1SJaegeuk Kim 498e05df3b1SJaegeuk Kim /* get indirect or direct nodes */ 499e05df3b1SJaegeuk Kim for (i = 1; i <= level; i++) { 500e05df3b1SJaegeuk Kim bool done = false; 501e05df3b1SJaegeuk Kim 502266e97a8SJaegeuk Kim if (!nids[i] && mode == ALLOC_NODE) { 503e05df3b1SJaegeuk Kim /* alloc new node */ 504e05df3b1SJaegeuk Kim if (!alloc_nid(sbi, &(nids[i]))) { 505e05df3b1SJaegeuk Kim err = -ENOSPC; 506e05df3b1SJaegeuk Kim goto release_pages; 507e05df3b1SJaegeuk Kim } 508e05df3b1SJaegeuk Kim 509e05df3b1SJaegeuk Kim dn->nid = nids[i]; 5108ae8f162SJaegeuk Kim npage[i] = new_node_page(dn, noffset[i], NULL); 511e05df3b1SJaegeuk Kim if (IS_ERR(npage[i])) { 512e05df3b1SJaegeuk Kim alloc_nid_failed(sbi, nids[i]); 513e05df3b1SJaegeuk Kim err = PTR_ERR(npage[i]); 514e05df3b1SJaegeuk Kim goto release_pages; 515e05df3b1SJaegeuk Kim } 516e05df3b1SJaegeuk Kim 517e05df3b1SJaegeuk Kim set_nid(parent, offset[i - 1], nids[i], i == 1); 518e05df3b1SJaegeuk Kim alloc_nid_done(sbi, nids[i]); 519e05df3b1SJaegeuk Kim done = true; 520266e97a8SJaegeuk Kim } else if (mode == LOOKUP_NODE_RA && i == level && level > 1) { 521e05df3b1SJaegeuk Kim npage[i] = get_node_page_ra(parent, offset[i - 1]); 522e05df3b1SJaegeuk Kim if (IS_ERR(npage[i])) { 523e05df3b1SJaegeuk Kim err = PTR_ERR(npage[i]); 524e05df3b1SJaegeuk Kim goto release_pages; 525e05df3b1SJaegeuk Kim } 526e05df3b1SJaegeuk Kim done = true; 527e05df3b1SJaegeuk Kim } 528e05df3b1SJaegeuk Kim if (i == 1) { 529e05df3b1SJaegeuk Kim dn->inode_page_locked = false; 530e05df3b1SJaegeuk Kim unlock_page(parent); 531e05df3b1SJaegeuk Kim } else { 532e05df3b1SJaegeuk Kim f2fs_put_page(parent, 1); 533e05df3b1SJaegeuk Kim } 534e05df3b1SJaegeuk Kim 535e05df3b1SJaegeuk Kim if (!done) { 536e05df3b1SJaegeuk Kim npage[i] = get_node_page(sbi, nids[i]); 537e05df3b1SJaegeuk Kim if (IS_ERR(npage[i])) { 538e05df3b1SJaegeuk Kim err = PTR_ERR(npage[i]); 539e05df3b1SJaegeuk Kim f2fs_put_page(npage[0], 0); 540e05df3b1SJaegeuk Kim goto release_out; 541e05df3b1SJaegeuk Kim } 542e05df3b1SJaegeuk Kim } 543e05df3b1SJaegeuk Kim if (i < level) { 544e05df3b1SJaegeuk Kim parent = npage[i]; 545e05df3b1SJaegeuk Kim nids[i + 1] = get_nid(parent, offset[i], false); 546e05df3b1SJaegeuk Kim } 547e05df3b1SJaegeuk Kim } 548e05df3b1SJaegeuk Kim dn->nid = nids[level]; 549e05df3b1SJaegeuk Kim dn->ofs_in_node = offset[level]; 550e05df3b1SJaegeuk Kim dn->node_page = npage[level]; 551e05df3b1SJaegeuk Kim dn->data_blkaddr = datablock_addr(dn->node_page, dn->ofs_in_node); 552e05df3b1SJaegeuk Kim return 0; 553e05df3b1SJaegeuk Kim 554e05df3b1SJaegeuk Kim release_pages: 555e05df3b1SJaegeuk Kim f2fs_put_page(parent, 1); 556e05df3b1SJaegeuk Kim if (i > 1) 557e05df3b1SJaegeuk Kim f2fs_put_page(npage[0], 0); 558e05df3b1SJaegeuk Kim release_out: 559e05df3b1SJaegeuk Kim dn->inode_page = NULL; 560e05df3b1SJaegeuk Kim dn->node_page = NULL; 561e05df3b1SJaegeuk Kim return err; 562e05df3b1SJaegeuk Kim } 563e05df3b1SJaegeuk Kim 564e05df3b1SJaegeuk Kim static void truncate_node(struct dnode_of_data *dn) 565e05df3b1SJaegeuk Kim { 5664081363fSJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); 567e05df3b1SJaegeuk Kim struct node_info ni; 568e05df3b1SJaegeuk Kim 569e05df3b1SJaegeuk Kim get_node_info(sbi, dn->nid, &ni); 57071e9fec5SJaegeuk Kim if (dn->inode->i_blocks == 0) { 5719850cf4aSJaegeuk Kim f2fs_bug_on(sbi, ni.blk_addr != NULL_ADDR); 57271e9fec5SJaegeuk Kim goto invalidate; 57371e9fec5SJaegeuk Kim } 5749850cf4aSJaegeuk Kim f2fs_bug_on(sbi, ni.blk_addr == NULL_ADDR); 575e05df3b1SJaegeuk Kim 576e05df3b1SJaegeuk Kim /* Deallocate node address */ 57771e9fec5SJaegeuk Kim invalidate_blocks(sbi, ni.blk_addr); 578ef86d709SGu Zheng dec_valid_node_count(sbi, dn->inode); 579479f40c4SJaegeuk Kim set_node_addr(sbi, &ni, NULL_ADDR, false); 580e05df3b1SJaegeuk Kim 581e05df3b1SJaegeuk Kim if (dn->nid == dn->inode->i_ino) { 582e05df3b1SJaegeuk Kim remove_orphan_inode(sbi, dn->nid); 583e05df3b1SJaegeuk Kim dec_valid_inode_count(sbi); 584e05df3b1SJaegeuk Kim } else { 585e05df3b1SJaegeuk Kim sync_inode_page(dn); 586e05df3b1SJaegeuk Kim } 58771e9fec5SJaegeuk Kim invalidate: 588e05df3b1SJaegeuk Kim clear_node_page_dirty(dn->node_page); 589e05df3b1SJaegeuk Kim F2FS_SET_SB_DIRT(sbi); 590e05df3b1SJaegeuk Kim 591e05df3b1SJaegeuk Kim f2fs_put_page(dn->node_page, 1); 592bf39c00aSJaegeuk Kim 593bf39c00aSJaegeuk Kim invalidate_mapping_pages(NODE_MAPPING(sbi), 594bf39c00aSJaegeuk Kim dn->node_page->index, dn->node_page->index); 595bf39c00aSJaegeuk Kim 596e05df3b1SJaegeuk Kim dn->node_page = NULL; 59751dd6249SNamjae Jeon trace_f2fs_truncate_node(dn->inode, dn->nid, ni.blk_addr); 598e05df3b1SJaegeuk Kim } 599e05df3b1SJaegeuk Kim 600e05df3b1SJaegeuk Kim static int truncate_dnode(struct dnode_of_data *dn) 601e05df3b1SJaegeuk Kim { 602e05df3b1SJaegeuk Kim struct page *page; 603e05df3b1SJaegeuk Kim 604e05df3b1SJaegeuk Kim if (dn->nid == 0) 605e05df3b1SJaegeuk Kim return 1; 606e05df3b1SJaegeuk Kim 607e05df3b1SJaegeuk Kim /* get direct node */ 6084081363fSJaegeuk Kim page = get_node_page(F2FS_I_SB(dn->inode), dn->nid); 609e05df3b1SJaegeuk Kim if (IS_ERR(page) && PTR_ERR(page) == -ENOENT) 610e05df3b1SJaegeuk Kim return 1; 611e05df3b1SJaegeuk Kim else if (IS_ERR(page)) 612e05df3b1SJaegeuk Kim return PTR_ERR(page); 613e05df3b1SJaegeuk Kim 614e05df3b1SJaegeuk Kim /* Make dnode_of_data for parameter */ 615e05df3b1SJaegeuk Kim dn->node_page = page; 616e05df3b1SJaegeuk Kim dn->ofs_in_node = 0; 617e05df3b1SJaegeuk Kim truncate_data_blocks(dn); 618e05df3b1SJaegeuk Kim truncate_node(dn); 619e05df3b1SJaegeuk Kim return 1; 620e05df3b1SJaegeuk Kim } 621e05df3b1SJaegeuk Kim 622e05df3b1SJaegeuk Kim static int truncate_nodes(struct dnode_of_data *dn, unsigned int nofs, 623e05df3b1SJaegeuk Kim int ofs, int depth) 624e05df3b1SJaegeuk Kim { 625e05df3b1SJaegeuk Kim struct dnode_of_data rdn = *dn; 626e05df3b1SJaegeuk Kim struct page *page; 627e05df3b1SJaegeuk Kim struct f2fs_node *rn; 628e05df3b1SJaegeuk Kim nid_t child_nid; 629e05df3b1SJaegeuk Kim unsigned int child_nofs; 630e05df3b1SJaegeuk Kim int freed = 0; 631e05df3b1SJaegeuk Kim int i, ret; 632e05df3b1SJaegeuk Kim 633e05df3b1SJaegeuk Kim if (dn->nid == 0) 634e05df3b1SJaegeuk Kim return NIDS_PER_BLOCK + 1; 635e05df3b1SJaegeuk Kim 63651dd6249SNamjae Jeon trace_f2fs_truncate_nodes_enter(dn->inode, dn->nid, dn->data_blkaddr); 63751dd6249SNamjae Jeon 6384081363fSJaegeuk Kim page = get_node_page(F2FS_I_SB(dn->inode), dn->nid); 63951dd6249SNamjae Jeon if (IS_ERR(page)) { 64051dd6249SNamjae Jeon trace_f2fs_truncate_nodes_exit(dn->inode, PTR_ERR(page)); 641e05df3b1SJaegeuk Kim return PTR_ERR(page); 64251dd6249SNamjae Jeon } 643e05df3b1SJaegeuk Kim 64445590710SGu Zheng rn = F2FS_NODE(page); 645e05df3b1SJaegeuk Kim if (depth < 3) { 646e05df3b1SJaegeuk Kim for (i = ofs; i < NIDS_PER_BLOCK; i++, freed++) { 647e05df3b1SJaegeuk Kim child_nid = le32_to_cpu(rn->in.nid[i]); 648e05df3b1SJaegeuk Kim if (child_nid == 0) 649e05df3b1SJaegeuk Kim continue; 650e05df3b1SJaegeuk Kim rdn.nid = child_nid; 651e05df3b1SJaegeuk Kim ret = truncate_dnode(&rdn); 652e05df3b1SJaegeuk Kim if (ret < 0) 653e05df3b1SJaegeuk Kim goto out_err; 654e05df3b1SJaegeuk Kim set_nid(page, i, 0, false); 655e05df3b1SJaegeuk Kim } 656e05df3b1SJaegeuk Kim } else { 657e05df3b1SJaegeuk Kim child_nofs = nofs + ofs * (NIDS_PER_BLOCK + 1) + 1; 658e05df3b1SJaegeuk Kim for (i = ofs; i < NIDS_PER_BLOCK; i++) { 659e05df3b1SJaegeuk Kim child_nid = le32_to_cpu(rn->in.nid[i]); 660e05df3b1SJaegeuk Kim if (child_nid == 0) { 661e05df3b1SJaegeuk Kim child_nofs += NIDS_PER_BLOCK + 1; 662e05df3b1SJaegeuk Kim continue; 663e05df3b1SJaegeuk Kim } 664e05df3b1SJaegeuk Kim rdn.nid = child_nid; 665e05df3b1SJaegeuk Kim ret = truncate_nodes(&rdn, child_nofs, 0, depth - 1); 666e05df3b1SJaegeuk Kim if (ret == (NIDS_PER_BLOCK + 1)) { 667e05df3b1SJaegeuk Kim set_nid(page, i, 0, false); 668e05df3b1SJaegeuk Kim child_nofs += ret; 669e05df3b1SJaegeuk Kim } else if (ret < 0 && ret != -ENOENT) { 670e05df3b1SJaegeuk Kim goto out_err; 671e05df3b1SJaegeuk Kim } 672e05df3b1SJaegeuk Kim } 673e05df3b1SJaegeuk Kim freed = child_nofs; 674e05df3b1SJaegeuk Kim } 675e05df3b1SJaegeuk Kim 676e05df3b1SJaegeuk Kim if (!ofs) { 677e05df3b1SJaegeuk Kim /* remove current indirect node */ 678e05df3b1SJaegeuk Kim dn->node_page = page; 679e05df3b1SJaegeuk Kim truncate_node(dn); 680e05df3b1SJaegeuk Kim freed++; 681e05df3b1SJaegeuk Kim } else { 682e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 683e05df3b1SJaegeuk Kim } 68451dd6249SNamjae Jeon trace_f2fs_truncate_nodes_exit(dn->inode, freed); 685e05df3b1SJaegeuk Kim return freed; 686e05df3b1SJaegeuk Kim 687e05df3b1SJaegeuk Kim out_err: 688e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 68951dd6249SNamjae Jeon trace_f2fs_truncate_nodes_exit(dn->inode, ret); 690e05df3b1SJaegeuk Kim return ret; 691e05df3b1SJaegeuk Kim } 692e05df3b1SJaegeuk Kim 693e05df3b1SJaegeuk Kim static int truncate_partial_nodes(struct dnode_of_data *dn, 694e05df3b1SJaegeuk Kim struct f2fs_inode *ri, int *offset, int depth) 695e05df3b1SJaegeuk Kim { 696e05df3b1SJaegeuk Kim struct page *pages[2]; 697e05df3b1SJaegeuk Kim nid_t nid[3]; 698e05df3b1SJaegeuk Kim nid_t child_nid; 699e05df3b1SJaegeuk Kim int err = 0; 700e05df3b1SJaegeuk Kim int i; 701e05df3b1SJaegeuk Kim int idx = depth - 2; 702e05df3b1SJaegeuk Kim 703e05df3b1SJaegeuk Kim nid[0] = le32_to_cpu(ri->i_nid[offset[0] - NODE_DIR1_BLOCK]); 704e05df3b1SJaegeuk Kim if (!nid[0]) 705e05df3b1SJaegeuk Kim return 0; 706e05df3b1SJaegeuk Kim 707e05df3b1SJaegeuk Kim /* get indirect nodes in the path */ 708a225dca3Sshifei10.ge for (i = 0; i < idx + 1; i++) { 709e1c42045Sarter97 /* reference count'll be increased */ 7104081363fSJaegeuk Kim pages[i] = get_node_page(F2FS_I_SB(dn->inode), nid[i]); 711e05df3b1SJaegeuk Kim if (IS_ERR(pages[i])) { 712e05df3b1SJaegeuk Kim err = PTR_ERR(pages[i]); 713a225dca3Sshifei10.ge idx = i - 1; 714e05df3b1SJaegeuk Kim goto fail; 715e05df3b1SJaegeuk Kim } 716e05df3b1SJaegeuk Kim nid[i + 1] = get_nid(pages[i], offset[i + 1], false); 717e05df3b1SJaegeuk Kim } 718e05df3b1SJaegeuk Kim 719e05df3b1SJaegeuk Kim /* free direct nodes linked to a partial indirect node */ 720a225dca3Sshifei10.ge for (i = offset[idx + 1]; i < NIDS_PER_BLOCK; i++) { 721e05df3b1SJaegeuk Kim child_nid = get_nid(pages[idx], i, false); 722e05df3b1SJaegeuk Kim if (!child_nid) 723e05df3b1SJaegeuk Kim continue; 724e05df3b1SJaegeuk Kim dn->nid = child_nid; 725e05df3b1SJaegeuk Kim err = truncate_dnode(dn); 726e05df3b1SJaegeuk Kim if (err < 0) 727e05df3b1SJaegeuk Kim goto fail; 728e05df3b1SJaegeuk Kim set_nid(pages[idx], i, 0, false); 729e05df3b1SJaegeuk Kim } 730e05df3b1SJaegeuk Kim 731a225dca3Sshifei10.ge if (offset[idx + 1] == 0) { 732e05df3b1SJaegeuk Kim dn->node_page = pages[idx]; 733e05df3b1SJaegeuk Kim dn->nid = nid[idx]; 734e05df3b1SJaegeuk Kim truncate_node(dn); 735e05df3b1SJaegeuk Kim } else { 736e05df3b1SJaegeuk Kim f2fs_put_page(pages[idx], 1); 737e05df3b1SJaegeuk Kim } 738e05df3b1SJaegeuk Kim offset[idx]++; 739a225dca3Sshifei10.ge offset[idx + 1] = 0; 740a225dca3Sshifei10.ge idx--; 741e05df3b1SJaegeuk Kim fail: 742a225dca3Sshifei10.ge for (i = idx; i >= 0; i--) 743e05df3b1SJaegeuk Kim f2fs_put_page(pages[i], 1); 74451dd6249SNamjae Jeon 74551dd6249SNamjae Jeon trace_f2fs_truncate_partial_nodes(dn->inode, nid, depth, err); 74651dd6249SNamjae Jeon 747e05df3b1SJaegeuk Kim return err; 748e05df3b1SJaegeuk Kim } 749e05df3b1SJaegeuk Kim 7500a8165d7SJaegeuk Kim /* 751e05df3b1SJaegeuk Kim * All the block addresses of data and nodes should be nullified. 752e05df3b1SJaegeuk Kim */ 753e05df3b1SJaegeuk Kim int truncate_inode_blocks(struct inode *inode, pgoff_t from) 754e05df3b1SJaegeuk Kim { 7554081363fSJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 756e05df3b1SJaegeuk Kim int err = 0, cont = 1; 757e05df3b1SJaegeuk Kim int level, offset[4], noffset[4]; 7587dd690c8SJaegeuk Kim unsigned int nofs = 0; 75958bfaf44SJaegeuk Kim struct f2fs_inode *ri; 760e05df3b1SJaegeuk Kim struct dnode_of_data dn; 761e05df3b1SJaegeuk Kim struct page *page; 762e05df3b1SJaegeuk Kim 76351dd6249SNamjae Jeon trace_f2fs_truncate_inode_blocks_enter(inode, from); 76451dd6249SNamjae Jeon 765de93653fSJaegeuk Kim level = get_node_path(F2FS_I(inode), from, offset, noffset); 766afcb7ca0SJaegeuk Kim restart: 767e05df3b1SJaegeuk Kim page = get_node_page(sbi, inode->i_ino); 76851dd6249SNamjae Jeon if (IS_ERR(page)) { 76951dd6249SNamjae Jeon trace_f2fs_truncate_inode_blocks_exit(inode, PTR_ERR(page)); 770e05df3b1SJaegeuk Kim return PTR_ERR(page); 77151dd6249SNamjae Jeon } 772e05df3b1SJaegeuk Kim 773e05df3b1SJaegeuk Kim set_new_dnode(&dn, inode, page, NULL, 0); 774e05df3b1SJaegeuk Kim unlock_page(page); 775e05df3b1SJaegeuk Kim 77658bfaf44SJaegeuk Kim ri = F2FS_INODE(page); 777e05df3b1SJaegeuk Kim switch (level) { 778e05df3b1SJaegeuk Kim case 0: 779e05df3b1SJaegeuk Kim case 1: 780e05df3b1SJaegeuk Kim nofs = noffset[1]; 781e05df3b1SJaegeuk Kim break; 782e05df3b1SJaegeuk Kim case 2: 783e05df3b1SJaegeuk Kim nofs = noffset[1]; 784e05df3b1SJaegeuk Kim if (!offset[level - 1]) 785e05df3b1SJaegeuk Kim goto skip_partial; 78658bfaf44SJaegeuk Kim err = truncate_partial_nodes(&dn, ri, offset, level); 787e05df3b1SJaegeuk Kim if (err < 0 && err != -ENOENT) 788e05df3b1SJaegeuk Kim goto fail; 789e05df3b1SJaegeuk Kim nofs += 1 + NIDS_PER_BLOCK; 790e05df3b1SJaegeuk Kim break; 791e05df3b1SJaegeuk Kim case 3: 792e05df3b1SJaegeuk Kim nofs = 5 + 2 * NIDS_PER_BLOCK; 793e05df3b1SJaegeuk Kim if (!offset[level - 1]) 794e05df3b1SJaegeuk Kim goto skip_partial; 79558bfaf44SJaegeuk Kim err = truncate_partial_nodes(&dn, ri, offset, level); 796e05df3b1SJaegeuk Kim if (err < 0 && err != -ENOENT) 797e05df3b1SJaegeuk Kim goto fail; 798e05df3b1SJaegeuk Kim break; 799e05df3b1SJaegeuk Kim default: 800e05df3b1SJaegeuk Kim BUG(); 801e05df3b1SJaegeuk Kim } 802e05df3b1SJaegeuk Kim 803e05df3b1SJaegeuk Kim skip_partial: 804e05df3b1SJaegeuk Kim while (cont) { 80558bfaf44SJaegeuk Kim dn.nid = le32_to_cpu(ri->i_nid[offset[0] - NODE_DIR1_BLOCK]); 806e05df3b1SJaegeuk Kim switch (offset[0]) { 807e05df3b1SJaegeuk Kim case NODE_DIR1_BLOCK: 808e05df3b1SJaegeuk Kim case NODE_DIR2_BLOCK: 809e05df3b1SJaegeuk Kim err = truncate_dnode(&dn); 810e05df3b1SJaegeuk Kim break; 811e05df3b1SJaegeuk Kim 812e05df3b1SJaegeuk Kim case NODE_IND1_BLOCK: 813e05df3b1SJaegeuk Kim case NODE_IND2_BLOCK: 814e05df3b1SJaegeuk Kim err = truncate_nodes(&dn, nofs, offset[1], 2); 815e05df3b1SJaegeuk Kim break; 816e05df3b1SJaegeuk Kim 817e05df3b1SJaegeuk Kim case NODE_DIND_BLOCK: 818e05df3b1SJaegeuk Kim err = truncate_nodes(&dn, nofs, offset[1], 3); 819e05df3b1SJaegeuk Kim cont = 0; 820e05df3b1SJaegeuk Kim break; 821e05df3b1SJaegeuk Kim 822e05df3b1SJaegeuk Kim default: 823e05df3b1SJaegeuk Kim BUG(); 824e05df3b1SJaegeuk Kim } 825e05df3b1SJaegeuk Kim if (err < 0 && err != -ENOENT) 826e05df3b1SJaegeuk Kim goto fail; 827e05df3b1SJaegeuk Kim if (offset[1] == 0 && 82858bfaf44SJaegeuk Kim ri->i_nid[offset[0] - NODE_DIR1_BLOCK]) { 829e05df3b1SJaegeuk Kim lock_page(page); 8304ef51a8fSJaegeuk Kim if (unlikely(page->mapping != NODE_MAPPING(sbi))) { 831afcb7ca0SJaegeuk Kim f2fs_put_page(page, 1); 832afcb7ca0SJaegeuk Kim goto restart; 833afcb7ca0SJaegeuk Kim } 8343cb5ad15SJaegeuk Kim f2fs_wait_on_page_writeback(page, NODE); 83558bfaf44SJaegeuk Kim ri->i_nid[offset[0] - NODE_DIR1_BLOCK] = 0; 836e05df3b1SJaegeuk Kim set_page_dirty(page); 837e05df3b1SJaegeuk Kim unlock_page(page); 838e05df3b1SJaegeuk Kim } 839e05df3b1SJaegeuk Kim offset[1] = 0; 840e05df3b1SJaegeuk Kim offset[0]++; 841e05df3b1SJaegeuk Kim nofs += err; 842e05df3b1SJaegeuk Kim } 843e05df3b1SJaegeuk Kim fail: 844e05df3b1SJaegeuk Kim f2fs_put_page(page, 0); 84551dd6249SNamjae Jeon trace_f2fs_truncate_inode_blocks_exit(inode, err); 846e05df3b1SJaegeuk Kim return err > 0 ? 0 : err; 847e05df3b1SJaegeuk Kim } 848e05df3b1SJaegeuk Kim 8494f16fb0fSJaegeuk Kim int truncate_xattr_node(struct inode *inode, struct page *page) 8504f16fb0fSJaegeuk Kim { 8514081363fSJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 8524f16fb0fSJaegeuk Kim nid_t nid = F2FS_I(inode)->i_xattr_nid; 8534f16fb0fSJaegeuk Kim struct dnode_of_data dn; 8544f16fb0fSJaegeuk Kim struct page *npage; 8554f16fb0fSJaegeuk Kim 8564f16fb0fSJaegeuk Kim if (!nid) 8574f16fb0fSJaegeuk Kim return 0; 8584f16fb0fSJaegeuk Kim 8594f16fb0fSJaegeuk Kim npage = get_node_page(sbi, nid); 8604f16fb0fSJaegeuk Kim if (IS_ERR(npage)) 8614f16fb0fSJaegeuk Kim return PTR_ERR(npage); 8624f16fb0fSJaegeuk Kim 8634f16fb0fSJaegeuk Kim F2FS_I(inode)->i_xattr_nid = 0; 86465985d93SJaegeuk Kim 86565985d93SJaegeuk Kim /* need to do checkpoint during fsync */ 86665985d93SJaegeuk Kim F2FS_I(inode)->xattr_ver = cur_cp_version(F2FS_CKPT(sbi)); 86765985d93SJaegeuk Kim 8684f16fb0fSJaegeuk Kim set_new_dnode(&dn, inode, page, npage, nid); 8694f16fb0fSJaegeuk Kim 8704f16fb0fSJaegeuk Kim if (page) 87101d2d1aaSChao Yu dn.inode_page_locked = true; 8724f16fb0fSJaegeuk Kim truncate_node(&dn); 8734f16fb0fSJaegeuk Kim return 0; 8744f16fb0fSJaegeuk Kim } 8754f16fb0fSJaegeuk Kim 87639936837SJaegeuk Kim /* 8774f4124d0SChao Yu * Caller should grab and release a rwsem by calling f2fs_lock_op() and 8784f4124d0SChao Yu * f2fs_unlock_op(). 87939936837SJaegeuk Kim */ 88058e674d6SGu Zheng void remove_inode_page(struct inode *inode) 881e05df3b1SJaegeuk Kim { 882e05df3b1SJaegeuk Kim struct dnode_of_data dn; 883e05df3b1SJaegeuk Kim 884c2e69583SJaegeuk Kim set_new_dnode(&dn, inode, NULL, NULL, inode->i_ino); 885c2e69583SJaegeuk Kim if (get_dnode_of_data(&dn, 0, LOOKUP_NODE)) 88658e674d6SGu Zheng return; 887e05df3b1SJaegeuk Kim 888c2e69583SJaegeuk Kim if (truncate_xattr_node(inode, dn.inode_page)) { 889c2e69583SJaegeuk Kim f2fs_put_dnode(&dn); 89058e674d6SGu Zheng return; 891e05df3b1SJaegeuk Kim } 892c2e69583SJaegeuk Kim 893c2e69583SJaegeuk Kim /* remove potential inline_data blocks */ 894c2e69583SJaegeuk Kim if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || 895c2e69583SJaegeuk Kim S_ISLNK(inode->i_mode)) 896c2e69583SJaegeuk Kim truncate_data_blocks_range(&dn, 1); 897c2e69583SJaegeuk Kim 898e1c42045Sarter97 /* 0 is possible, after f2fs_new_inode() has failed */ 8999850cf4aSJaegeuk Kim f2fs_bug_on(F2FS_I_SB(inode), 9009850cf4aSJaegeuk Kim inode->i_blocks != 0 && inode->i_blocks != 1); 901c2e69583SJaegeuk Kim 902c2e69583SJaegeuk Kim /* will put inode & node pages */ 903e05df3b1SJaegeuk Kim truncate_node(&dn); 904e05df3b1SJaegeuk Kim } 905e05df3b1SJaegeuk Kim 906a014e037SJaegeuk Kim struct page *new_inode_page(struct inode *inode) 907e05df3b1SJaegeuk Kim { 908e05df3b1SJaegeuk Kim struct dnode_of_data dn; 909e05df3b1SJaegeuk Kim 910e05df3b1SJaegeuk Kim /* allocate inode page for new inode */ 911e05df3b1SJaegeuk Kim set_new_dnode(&dn, inode, NULL, NULL, inode->i_ino); 91244a83ff6SJaegeuk Kim 91344a83ff6SJaegeuk Kim /* caller should f2fs_put_page(page, 1); */ 9148ae8f162SJaegeuk Kim return new_node_page(&dn, 0, NULL); 915e05df3b1SJaegeuk Kim } 916e05df3b1SJaegeuk Kim 9178ae8f162SJaegeuk Kim struct page *new_node_page(struct dnode_of_data *dn, 9188ae8f162SJaegeuk Kim unsigned int ofs, struct page *ipage) 919e05df3b1SJaegeuk Kim { 9204081363fSJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); 921e05df3b1SJaegeuk Kim struct node_info old_ni, new_ni; 922e05df3b1SJaegeuk Kim struct page *page; 923e05df3b1SJaegeuk Kim int err; 924e05df3b1SJaegeuk Kim 9256bacf52fSJaegeuk Kim if (unlikely(is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC))) 926e05df3b1SJaegeuk Kim return ERR_PTR(-EPERM); 927e05df3b1SJaegeuk Kim 92854b591dfSJaegeuk Kim page = grab_cache_page(NODE_MAPPING(sbi), dn->nid); 929e05df3b1SJaegeuk Kim if (!page) 930e05df3b1SJaegeuk Kim return ERR_PTR(-ENOMEM); 931e05df3b1SJaegeuk Kim 9326bacf52fSJaegeuk Kim if (unlikely(!inc_valid_node_count(sbi, dn->inode))) { 9339c02740cSJaegeuk Kim err = -ENOSPC; 9349c02740cSJaegeuk Kim goto fail; 9359c02740cSJaegeuk Kim } 936e05df3b1SJaegeuk Kim 9379c02740cSJaegeuk Kim get_node_info(sbi, dn->nid, &old_ni); 938e05df3b1SJaegeuk Kim 939e05df3b1SJaegeuk Kim /* Reinitialize old_ni with new node page */ 9409850cf4aSJaegeuk Kim f2fs_bug_on(sbi, old_ni.blk_addr != NULL_ADDR); 941e05df3b1SJaegeuk Kim new_ni = old_ni; 942e05df3b1SJaegeuk Kim new_ni.ino = dn->inode->i_ino; 943479f40c4SJaegeuk Kim set_node_addr(sbi, &new_ni, NEW_ADDR, false); 9449c02740cSJaegeuk Kim 94554b591dfSJaegeuk Kim f2fs_wait_on_page_writeback(page, NODE); 9469c02740cSJaegeuk Kim fill_node_footer(page, dn->nid, dn->inode->i_ino, ofs, true); 947398b1ac5SJaegeuk Kim set_cold_node(dn->inode, page); 9489c02740cSJaegeuk Kim SetPageUptodate(page); 9499c02740cSJaegeuk Kim set_page_dirty(page); 950e05df3b1SJaegeuk Kim 9514bc8e9bcSChao Yu if (f2fs_has_xattr_block(ofs)) 952479bd73aSJaegeuk Kim F2FS_I(dn->inode)->i_xattr_nid = dn->nid; 953479bd73aSJaegeuk Kim 954e05df3b1SJaegeuk Kim dn->node_page = page; 9558ae8f162SJaegeuk Kim if (ipage) 9568ae8f162SJaegeuk Kim update_inode(dn->inode, ipage); 9578ae8f162SJaegeuk Kim else 958e05df3b1SJaegeuk Kim sync_inode_page(dn); 959e05df3b1SJaegeuk Kim if (ofs == 0) 960e05df3b1SJaegeuk Kim inc_valid_inode_count(sbi); 961e05df3b1SJaegeuk Kim 962e05df3b1SJaegeuk Kim return page; 963e05df3b1SJaegeuk Kim 964e05df3b1SJaegeuk Kim fail: 96571e9fec5SJaegeuk Kim clear_node_page_dirty(page); 966e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 967e05df3b1SJaegeuk Kim return ERR_PTR(err); 968e05df3b1SJaegeuk Kim } 969e05df3b1SJaegeuk Kim 97056ae674cSJaegeuk Kim /* 97156ae674cSJaegeuk Kim * Caller should do after getting the following values. 97256ae674cSJaegeuk Kim * 0: f2fs_put_page(page, 0) 97356ae674cSJaegeuk Kim * LOCKED_PAGE: f2fs_put_page(page, 1) 97456ae674cSJaegeuk Kim * error: nothing 97556ae674cSJaegeuk Kim */ 97693dfe2acSJaegeuk Kim static int read_node_page(struct page *page, int rw) 977e05df3b1SJaegeuk Kim { 9784081363fSJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_P_SB(page); 979e05df3b1SJaegeuk Kim struct node_info ni; 980e05df3b1SJaegeuk Kim 981e05df3b1SJaegeuk Kim get_node_info(sbi, page->index, &ni); 982e05df3b1SJaegeuk Kim 9836bacf52fSJaegeuk Kim if (unlikely(ni.blk_addr == NULL_ADDR)) { 984393ff91fSJaegeuk Kim f2fs_put_page(page, 1); 985e05df3b1SJaegeuk Kim return -ENOENT; 986393ff91fSJaegeuk Kim } 987393ff91fSJaegeuk Kim 98856ae674cSJaegeuk Kim if (PageUptodate(page)) 98956ae674cSJaegeuk Kim return LOCKED_PAGE; 990393ff91fSJaegeuk Kim 99193dfe2acSJaegeuk Kim return f2fs_submit_page_bio(sbi, page, ni.blk_addr, rw); 992e05df3b1SJaegeuk Kim } 993e05df3b1SJaegeuk Kim 9940a8165d7SJaegeuk Kim /* 995e05df3b1SJaegeuk Kim * Readahead a node page 996e05df3b1SJaegeuk Kim */ 997e05df3b1SJaegeuk Kim void ra_node_page(struct f2fs_sb_info *sbi, nid_t nid) 998e05df3b1SJaegeuk Kim { 999e05df3b1SJaegeuk Kim struct page *apage; 100056ae674cSJaegeuk Kim int err; 1001e05df3b1SJaegeuk Kim 10024ef51a8fSJaegeuk Kim apage = find_get_page(NODE_MAPPING(sbi), nid); 1003393ff91fSJaegeuk Kim if (apage && PageUptodate(apage)) { 1004393ff91fSJaegeuk Kim f2fs_put_page(apage, 0); 1005393ff91fSJaegeuk Kim return; 1006393ff91fSJaegeuk Kim } 1007e05df3b1SJaegeuk Kim f2fs_put_page(apage, 0); 1008e05df3b1SJaegeuk Kim 10094ef51a8fSJaegeuk Kim apage = grab_cache_page(NODE_MAPPING(sbi), nid); 1010e05df3b1SJaegeuk Kim if (!apage) 1011e05df3b1SJaegeuk Kim return; 1012e05df3b1SJaegeuk Kim 101356ae674cSJaegeuk Kim err = read_node_page(apage, READA); 101456ae674cSJaegeuk Kim if (err == 0) 1015369a708cSJaegeuk Kim f2fs_put_page(apage, 0); 101656ae674cSJaegeuk Kim else if (err == LOCKED_PAGE) 101756ae674cSJaegeuk Kim f2fs_put_page(apage, 1); 1018e05df3b1SJaegeuk Kim } 1019e05df3b1SJaegeuk Kim 1020e05df3b1SJaegeuk Kim struct page *get_node_page(struct f2fs_sb_info *sbi, pgoff_t nid) 1021e05df3b1SJaegeuk Kim { 102256ae674cSJaegeuk Kim struct page *page; 102356ae674cSJaegeuk Kim int err; 1024afcb7ca0SJaegeuk Kim repeat: 102554b591dfSJaegeuk Kim page = grab_cache_page(NODE_MAPPING(sbi), nid); 1026e05df3b1SJaegeuk Kim if (!page) 1027e05df3b1SJaegeuk Kim return ERR_PTR(-ENOMEM); 1028e05df3b1SJaegeuk Kim 1029e05df3b1SJaegeuk Kim err = read_node_page(page, READ_SYNC); 103056ae674cSJaegeuk Kim if (err < 0) 1031e05df3b1SJaegeuk Kim return ERR_PTR(err); 103256ae674cSJaegeuk Kim else if (err == LOCKED_PAGE) 103356ae674cSJaegeuk Kim goto got_it; 1034e05df3b1SJaegeuk Kim 1035393ff91fSJaegeuk Kim lock_page(page); 10363bb5e2c8SJaegeuk Kim if (unlikely(!PageUptodate(page) || nid != nid_of_node(page))) { 1037393ff91fSJaegeuk Kim f2fs_put_page(page, 1); 1038393ff91fSJaegeuk Kim return ERR_PTR(-EIO); 1039393ff91fSJaegeuk Kim } 10404ef51a8fSJaegeuk Kim if (unlikely(page->mapping != NODE_MAPPING(sbi))) { 1041afcb7ca0SJaegeuk Kim f2fs_put_page(page, 1); 1042afcb7ca0SJaegeuk Kim goto repeat; 1043afcb7ca0SJaegeuk Kim } 104456ae674cSJaegeuk Kim got_it: 1045e05df3b1SJaegeuk Kim return page; 1046e05df3b1SJaegeuk Kim } 1047e05df3b1SJaegeuk Kim 10480a8165d7SJaegeuk Kim /* 1049e05df3b1SJaegeuk Kim * Return a locked page for the desired node page. 1050e05df3b1SJaegeuk Kim * And, readahead MAX_RA_NODE number of node pages. 1051e05df3b1SJaegeuk Kim */ 1052e05df3b1SJaegeuk Kim struct page *get_node_page_ra(struct page *parent, int start) 1053e05df3b1SJaegeuk Kim { 10544081363fSJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_P_SB(parent); 1055c718379bSJaegeuk Kim struct blk_plug plug; 1056e05df3b1SJaegeuk Kim struct page *page; 105756ae674cSJaegeuk Kim int err, i, end; 105856ae674cSJaegeuk Kim nid_t nid; 1059e05df3b1SJaegeuk Kim 1060e05df3b1SJaegeuk Kim /* First, try getting the desired direct node. */ 1061e05df3b1SJaegeuk Kim nid = get_nid(parent, start, false); 1062e05df3b1SJaegeuk Kim if (!nid) 1063e05df3b1SJaegeuk Kim return ERR_PTR(-ENOENT); 1064afcb7ca0SJaegeuk Kim repeat: 10654ef51a8fSJaegeuk Kim page = grab_cache_page(NODE_MAPPING(sbi), nid); 1066e05df3b1SJaegeuk Kim if (!page) 1067e05df3b1SJaegeuk Kim return ERR_PTR(-ENOMEM); 1068e05df3b1SJaegeuk Kim 106966d36a29SJaegeuk Kim err = read_node_page(page, READ_SYNC); 107056ae674cSJaegeuk Kim if (err < 0) 1071e05df3b1SJaegeuk Kim return ERR_PTR(err); 107256ae674cSJaegeuk Kim else if (err == LOCKED_PAGE) 107356ae674cSJaegeuk Kim goto page_hit; 1074e05df3b1SJaegeuk Kim 1075c718379bSJaegeuk Kim blk_start_plug(&plug); 1076c718379bSJaegeuk Kim 1077e05df3b1SJaegeuk Kim /* Then, try readahead for siblings of the desired node */ 1078e05df3b1SJaegeuk Kim end = start + MAX_RA_NODE; 1079e05df3b1SJaegeuk Kim end = min(end, NIDS_PER_BLOCK); 1080e05df3b1SJaegeuk Kim for (i = start + 1; i < end; i++) { 1081e05df3b1SJaegeuk Kim nid = get_nid(parent, i, false); 1082e05df3b1SJaegeuk Kim if (!nid) 1083e05df3b1SJaegeuk Kim continue; 1084e05df3b1SJaegeuk Kim ra_node_page(sbi, nid); 1085e05df3b1SJaegeuk Kim } 1086e05df3b1SJaegeuk Kim 1087c718379bSJaegeuk Kim blk_finish_plug(&plug); 1088c718379bSJaegeuk Kim 1089e05df3b1SJaegeuk Kim lock_page(page); 10904ef51a8fSJaegeuk Kim if (unlikely(page->mapping != NODE_MAPPING(sbi))) { 1091afcb7ca0SJaegeuk Kim f2fs_put_page(page, 1); 1092afcb7ca0SJaegeuk Kim goto repeat; 1093afcb7ca0SJaegeuk Kim } 1094e0f56cb4SNamjae Jeon page_hit: 10956bacf52fSJaegeuk Kim if (unlikely(!PageUptodate(page))) { 1096e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 1097e05df3b1SJaegeuk Kim return ERR_PTR(-EIO); 1098e05df3b1SJaegeuk Kim } 1099e05df3b1SJaegeuk Kim return page; 1100e05df3b1SJaegeuk Kim } 1101e05df3b1SJaegeuk Kim 1102e05df3b1SJaegeuk Kim void sync_inode_page(struct dnode_of_data *dn) 1103e05df3b1SJaegeuk Kim { 1104e05df3b1SJaegeuk Kim if (IS_INODE(dn->node_page) || dn->inode_page == dn->node_page) { 1105e05df3b1SJaegeuk Kim update_inode(dn->inode, dn->node_page); 1106e05df3b1SJaegeuk Kim } else if (dn->inode_page) { 1107e05df3b1SJaegeuk Kim if (!dn->inode_page_locked) 1108e05df3b1SJaegeuk Kim lock_page(dn->inode_page); 1109e05df3b1SJaegeuk Kim update_inode(dn->inode, dn->inode_page); 1110e05df3b1SJaegeuk Kim if (!dn->inode_page_locked) 1111e05df3b1SJaegeuk Kim unlock_page(dn->inode_page); 1112e05df3b1SJaegeuk Kim } else { 111339936837SJaegeuk Kim update_inode_page(dn->inode); 1114e05df3b1SJaegeuk Kim } 1115e05df3b1SJaegeuk Kim } 1116e05df3b1SJaegeuk Kim 1117e05df3b1SJaegeuk Kim int sync_node_pages(struct f2fs_sb_info *sbi, nid_t ino, 1118e05df3b1SJaegeuk Kim struct writeback_control *wbc) 1119e05df3b1SJaegeuk Kim { 1120e05df3b1SJaegeuk Kim pgoff_t index, end; 1121e05df3b1SJaegeuk Kim struct pagevec pvec; 1122e05df3b1SJaegeuk Kim int step = ino ? 2 : 0; 1123e05df3b1SJaegeuk Kim int nwritten = 0, wrote = 0; 1124e05df3b1SJaegeuk Kim 1125e05df3b1SJaegeuk Kim pagevec_init(&pvec, 0); 1126e05df3b1SJaegeuk Kim 1127e05df3b1SJaegeuk Kim next_step: 1128e05df3b1SJaegeuk Kim index = 0; 1129e05df3b1SJaegeuk Kim end = LONG_MAX; 1130e05df3b1SJaegeuk Kim 1131e05df3b1SJaegeuk Kim while (index <= end) { 1132e05df3b1SJaegeuk Kim int i, nr_pages; 11334ef51a8fSJaegeuk Kim nr_pages = pagevec_lookup_tag(&pvec, NODE_MAPPING(sbi), &index, 1134e05df3b1SJaegeuk Kim PAGECACHE_TAG_DIRTY, 1135e05df3b1SJaegeuk Kim min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1); 1136e05df3b1SJaegeuk Kim if (nr_pages == 0) 1137e05df3b1SJaegeuk Kim break; 1138e05df3b1SJaegeuk Kim 1139e05df3b1SJaegeuk Kim for (i = 0; i < nr_pages; i++) { 1140e05df3b1SJaegeuk Kim struct page *page = pvec.pages[i]; 1141e05df3b1SJaegeuk Kim 1142e05df3b1SJaegeuk Kim /* 1143e05df3b1SJaegeuk Kim * flushing sequence with step: 1144e05df3b1SJaegeuk Kim * 0. indirect nodes 1145e05df3b1SJaegeuk Kim * 1. dentry dnodes 1146e05df3b1SJaegeuk Kim * 2. file dnodes 1147e05df3b1SJaegeuk Kim */ 1148e05df3b1SJaegeuk Kim if (step == 0 && IS_DNODE(page)) 1149e05df3b1SJaegeuk Kim continue; 1150e05df3b1SJaegeuk Kim if (step == 1 && (!IS_DNODE(page) || 1151e05df3b1SJaegeuk Kim is_cold_node(page))) 1152e05df3b1SJaegeuk Kim continue; 1153e05df3b1SJaegeuk Kim if (step == 2 && (!IS_DNODE(page) || 1154e05df3b1SJaegeuk Kim !is_cold_node(page))) 1155e05df3b1SJaegeuk Kim continue; 1156e05df3b1SJaegeuk Kim 1157e05df3b1SJaegeuk Kim /* 1158e05df3b1SJaegeuk Kim * If an fsync mode, 1159e05df3b1SJaegeuk Kim * we should not skip writing node pages. 1160e05df3b1SJaegeuk Kim */ 1161e05df3b1SJaegeuk Kim if (ino && ino_of_node(page) == ino) 1162e05df3b1SJaegeuk Kim lock_page(page); 1163e05df3b1SJaegeuk Kim else if (!trylock_page(page)) 1164e05df3b1SJaegeuk Kim continue; 1165e05df3b1SJaegeuk Kim 11664ef51a8fSJaegeuk Kim if (unlikely(page->mapping != NODE_MAPPING(sbi))) { 1167e05df3b1SJaegeuk Kim continue_unlock: 1168e05df3b1SJaegeuk Kim unlock_page(page); 1169e05df3b1SJaegeuk Kim continue; 1170e05df3b1SJaegeuk Kim } 1171e05df3b1SJaegeuk Kim if (ino && ino_of_node(page) != ino) 1172e05df3b1SJaegeuk Kim goto continue_unlock; 1173e05df3b1SJaegeuk Kim 1174e05df3b1SJaegeuk Kim if (!PageDirty(page)) { 1175e05df3b1SJaegeuk Kim /* someone wrote it for us */ 1176e05df3b1SJaegeuk Kim goto continue_unlock; 1177e05df3b1SJaegeuk Kim } 1178e05df3b1SJaegeuk Kim 1179e05df3b1SJaegeuk Kim if (!clear_page_dirty_for_io(page)) 1180e05df3b1SJaegeuk Kim goto continue_unlock; 1181e05df3b1SJaegeuk Kim 1182e05df3b1SJaegeuk Kim /* called by fsync() */ 1183e05df3b1SJaegeuk Kim if (ino && IS_DNODE(page)) { 1184e05df3b1SJaegeuk Kim set_fsync_mark(page, 1); 118588bd02c9SJaegeuk Kim if (IS_INODE(page)) { 118688bd02c9SJaegeuk Kim if (!is_checkpointed_node(sbi, ino) && 118788bd02c9SJaegeuk Kim !has_fsynced_inode(sbi, ino)) 118888bd02c9SJaegeuk Kim set_dentry_mark(page, 1); 118988bd02c9SJaegeuk Kim else 119088bd02c9SJaegeuk Kim set_dentry_mark(page, 0); 119188bd02c9SJaegeuk Kim } 1192e05df3b1SJaegeuk Kim nwritten++; 1193e05df3b1SJaegeuk Kim } else { 1194e05df3b1SJaegeuk Kim set_fsync_mark(page, 0); 1195e05df3b1SJaegeuk Kim set_dentry_mark(page, 0); 1196e05df3b1SJaegeuk Kim } 119752746519SJaegeuk Kim 119852746519SJaegeuk Kim if (NODE_MAPPING(sbi)->a_ops->writepage(page, wbc)) 119952746519SJaegeuk Kim unlock_page(page); 120052746519SJaegeuk Kim else 1201e05df3b1SJaegeuk Kim wrote++; 1202e05df3b1SJaegeuk Kim 1203e05df3b1SJaegeuk Kim if (--wbc->nr_to_write == 0) 1204e05df3b1SJaegeuk Kim break; 1205e05df3b1SJaegeuk Kim } 1206e05df3b1SJaegeuk Kim pagevec_release(&pvec); 1207e05df3b1SJaegeuk Kim cond_resched(); 1208e05df3b1SJaegeuk Kim 1209e05df3b1SJaegeuk Kim if (wbc->nr_to_write == 0) { 1210e05df3b1SJaegeuk Kim step = 2; 1211e05df3b1SJaegeuk Kim break; 1212e05df3b1SJaegeuk Kim } 1213e05df3b1SJaegeuk Kim } 1214e05df3b1SJaegeuk Kim 1215e05df3b1SJaegeuk Kim if (step < 2) { 1216e05df3b1SJaegeuk Kim step++; 1217e05df3b1SJaegeuk Kim goto next_step; 1218e05df3b1SJaegeuk Kim } 1219e05df3b1SJaegeuk Kim 1220e05df3b1SJaegeuk Kim if (wrote) 1221458e6197SJaegeuk Kim f2fs_submit_merged_bio(sbi, NODE, WRITE); 1222e05df3b1SJaegeuk Kim return nwritten; 1223e05df3b1SJaegeuk Kim } 1224e05df3b1SJaegeuk Kim 1225cfe58f9dSJaegeuk Kim int wait_on_node_pages_writeback(struct f2fs_sb_info *sbi, nid_t ino) 1226cfe58f9dSJaegeuk Kim { 1227cfe58f9dSJaegeuk Kim pgoff_t index = 0, end = LONG_MAX; 1228cfe58f9dSJaegeuk Kim struct pagevec pvec; 1229cfe58f9dSJaegeuk Kim int ret2 = 0, ret = 0; 1230cfe58f9dSJaegeuk Kim 1231cfe58f9dSJaegeuk Kim pagevec_init(&pvec, 0); 12324ef51a8fSJaegeuk Kim 12334ef51a8fSJaegeuk Kim while (index <= end) { 12344ef51a8fSJaegeuk Kim int i, nr_pages; 12354ef51a8fSJaegeuk Kim nr_pages = pagevec_lookup_tag(&pvec, NODE_MAPPING(sbi), &index, 1236cfe58f9dSJaegeuk Kim PAGECACHE_TAG_WRITEBACK, 12374ef51a8fSJaegeuk Kim min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1); 12384ef51a8fSJaegeuk Kim if (nr_pages == 0) 12394ef51a8fSJaegeuk Kim break; 1240cfe58f9dSJaegeuk Kim 1241cfe58f9dSJaegeuk Kim for (i = 0; i < nr_pages; i++) { 1242cfe58f9dSJaegeuk Kim struct page *page = pvec.pages[i]; 1243cfe58f9dSJaegeuk Kim 1244cfe58f9dSJaegeuk Kim /* until radix tree lookup accepts end_index */ 1245cfb271d4SChao Yu if (unlikely(page->index > end)) 1246cfe58f9dSJaegeuk Kim continue; 1247cfe58f9dSJaegeuk Kim 12484bf08ff6SChao Yu if (ino && ino_of_node(page) == ino) { 12493cb5ad15SJaegeuk Kim f2fs_wait_on_page_writeback(page, NODE); 1250cfe58f9dSJaegeuk Kim if (TestClearPageError(page)) 1251cfe58f9dSJaegeuk Kim ret = -EIO; 1252cfe58f9dSJaegeuk Kim } 12534bf08ff6SChao Yu } 1254cfe58f9dSJaegeuk Kim pagevec_release(&pvec); 1255cfe58f9dSJaegeuk Kim cond_resched(); 1256cfe58f9dSJaegeuk Kim } 1257cfe58f9dSJaegeuk Kim 12584ef51a8fSJaegeuk Kim if (unlikely(test_and_clear_bit(AS_ENOSPC, &NODE_MAPPING(sbi)->flags))) 1259cfe58f9dSJaegeuk Kim ret2 = -ENOSPC; 12604ef51a8fSJaegeuk Kim if (unlikely(test_and_clear_bit(AS_EIO, &NODE_MAPPING(sbi)->flags))) 1261cfe58f9dSJaegeuk Kim ret2 = -EIO; 1262cfe58f9dSJaegeuk Kim if (!ret) 1263cfe58f9dSJaegeuk Kim ret = ret2; 1264cfe58f9dSJaegeuk Kim return ret; 1265cfe58f9dSJaegeuk Kim } 1266cfe58f9dSJaegeuk Kim 1267e05df3b1SJaegeuk Kim static int f2fs_write_node_page(struct page *page, 1268e05df3b1SJaegeuk Kim struct writeback_control *wbc) 1269e05df3b1SJaegeuk Kim { 12704081363fSJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_P_SB(page); 1271e05df3b1SJaegeuk Kim nid_t nid; 1272e05df3b1SJaegeuk Kim block_t new_addr; 1273e05df3b1SJaegeuk Kim struct node_info ni; 1274fb5566daSJaegeuk Kim struct f2fs_io_info fio = { 1275fb5566daSJaegeuk Kim .type = NODE, 1276fb5566daSJaegeuk Kim .rw = (wbc->sync_mode == WB_SYNC_ALL) ? WRITE_SYNC : WRITE, 1277fb5566daSJaegeuk Kim }; 1278e05df3b1SJaegeuk Kim 1279ecda0de3SChao Yu trace_f2fs_writepage(page, NODE); 1280ecda0de3SChao Yu 1281cfb271d4SChao Yu if (unlikely(sbi->por_doing)) 128287a9bd26SJaegeuk Kim goto redirty_out; 1283cf779cabSJaegeuk Kim if (unlikely(f2fs_cp_error(sbi))) 1284cf779cabSJaegeuk Kim goto redirty_out; 128587a9bd26SJaegeuk Kim 12863cb5ad15SJaegeuk Kim f2fs_wait_on_page_writeback(page, NODE); 1287e05df3b1SJaegeuk Kim 1288e05df3b1SJaegeuk Kim /* get old block addr of this node page */ 1289e05df3b1SJaegeuk Kim nid = nid_of_node(page); 12909850cf4aSJaegeuk Kim f2fs_bug_on(sbi, page->index != nid); 1291e05df3b1SJaegeuk Kim 1292e05df3b1SJaegeuk Kim get_node_info(sbi, nid, &ni); 1293e05df3b1SJaegeuk Kim 1294e05df3b1SJaegeuk Kim /* This page is already truncated */ 12956bacf52fSJaegeuk Kim if (unlikely(ni.blk_addr == NULL_ADDR)) { 129639936837SJaegeuk Kim dec_page_count(sbi, F2FS_DIRTY_NODES); 129739936837SJaegeuk Kim unlock_page(page); 129839936837SJaegeuk Kim return 0; 129939936837SJaegeuk Kim } 1300e05df3b1SJaegeuk Kim 13012f97c326SJaegeuk Kim if (wbc->for_reclaim) { 13022f97c326SJaegeuk Kim if (!down_read_trylock(&sbi->node_write)) 130387a9bd26SJaegeuk Kim goto redirty_out; 13042f97c326SJaegeuk Kim } else { 1305b3582c68SChao Yu down_read(&sbi->node_write); 13062f97c326SJaegeuk Kim } 1307e05df3b1SJaegeuk Kim set_page_writeback(page); 1308fb5566daSJaegeuk Kim write_node_page(sbi, page, &fio, nid, ni.blk_addr, &new_addr); 1309479f40c4SJaegeuk Kim set_node_addr(sbi, &ni, new_addr, is_fsync_dnode(page)); 1310e05df3b1SJaegeuk Kim dec_page_count(sbi, F2FS_DIRTY_NODES); 1311b3582c68SChao Yu up_read(&sbi->node_write); 1312e05df3b1SJaegeuk Kim unlock_page(page); 131327c6bd60SJaegeuk Kim 131427c6bd60SJaegeuk Kim if (wbc->for_reclaim) 131527c6bd60SJaegeuk Kim f2fs_submit_merged_bio(sbi, NODE, WRITE); 131627c6bd60SJaegeuk Kim 1317e05df3b1SJaegeuk Kim return 0; 131887a9bd26SJaegeuk Kim 131987a9bd26SJaegeuk Kim redirty_out: 132076f60268SJaegeuk Kim redirty_page_for_writepage(wbc, page); 132187a9bd26SJaegeuk Kim return AOP_WRITEPAGE_ACTIVATE; 1322e05df3b1SJaegeuk Kim } 1323e05df3b1SJaegeuk Kim 1324e05df3b1SJaegeuk Kim static int f2fs_write_node_pages(struct address_space *mapping, 1325e05df3b1SJaegeuk Kim struct writeback_control *wbc) 1326e05df3b1SJaegeuk Kim { 13274081363fSJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_M_SB(mapping); 132850c8cdb3SJaegeuk Kim long diff; 1329e05df3b1SJaegeuk Kim 1330e5748434SChao Yu trace_f2fs_writepages(mapping->host, wbc, NODE); 1331e5748434SChao Yu 13324660f9c0SJaegeuk Kim /* balancing f2fs's metadata in background */ 13334660f9c0SJaegeuk Kim f2fs_balance_fs_bg(sbi); 1334e05df3b1SJaegeuk Kim 1335a7fdffbdSJaegeuk Kim /* collect a number of dirty node pages and write together */ 133687d6f890SJaegeuk Kim if (get_pages(sbi, F2FS_DIRTY_NODES) < nr_pages_to_skip(sbi, NODE)) 1337d3baf95dSJaegeuk Kim goto skip_write; 1338a7fdffbdSJaegeuk Kim 133950c8cdb3SJaegeuk Kim diff = nr_pages_to_write(sbi, NODE, wbc); 1340fb5566daSJaegeuk Kim wbc->sync_mode = WB_SYNC_NONE; 1341e05df3b1SJaegeuk Kim sync_node_pages(sbi, 0, wbc); 134250c8cdb3SJaegeuk Kim wbc->nr_to_write = max((long)0, wbc->nr_to_write - diff); 1343e05df3b1SJaegeuk Kim return 0; 1344d3baf95dSJaegeuk Kim 1345d3baf95dSJaegeuk Kim skip_write: 1346d3baf95dSJaegeuk Kim wbc->pages_skipped += get_pages(sbi, F2FS_DIRTY_NODES); 1347d3baf95dSJaegeuk Kim return 0; 1348e05df3b1SJaegeuk Kim } 1349e05df3b1SJaegeuk Kim 1350e05df3b1SJaegeuk Kim static int f2fs_set_node_page_dirty(struct page *page) 1351e05df3b1SJaegeuk Kim { 135226c6b887SJaegeuk Kim trace_f2fs_set_page_dirty(page, NODE); 135326c6b887SJaegeuk Kim 1354e05df3b1SJaegeuk Kim SetPageUptodate(page); 1355e05df3b1SJaegeuk Kim if (!PageDirty(page)) { 1356e05df3b1SJaegeuk Kim __set_page_dirty_nobuffers(page); 13574081363fSJaegeuk Kim inc_page_count(F2FS_P_SB(page), F2FS_DIRTY_NODES); 1358e05df3b1SJaegeuk Kim SetPagePrivate(page); 1359e05df3b1SJaegeuk Kim return 1; 1360e05df3b1SJaegeuk Kim } 1361e05df3b1SJaegeuk Kim return 0; 1362e05df3b1SJaegeuk Kim } 1363e05df3b1SJaegeuk Kim 1364d47992f8SLukas Czerner static void f2fs_invalidate_node_page(struct page *page, unsigned int offset, 1365d47992f8SLukas Czerner unsigned int length) 1366e05df3b1SJaegeuk Kim { 1367e05df3b1SJaegeuk Kim struct inode *inode = page->mapping->host; 1368e05df3b1SJaegeuk Kim if (PageDirty(page)) 13694081363fSJaegeuk Kim dec_page_count(F2FS_I_SB(inode), F2FS_DIRTY_NODES); 1370e05df3b1SJaegeuk Kim ClearPagePrivate(page); 1371e05df3b1SJaegeuk Kim } 1372e05df3b1SJaegeuk Kim 1373e05df3b1SJaegeuk Kim static int f2fs_release_node_page(struct page *page, gfp_t wait) 1374e05df3b1SJaegeuk Kim { 1375e05df3b1SJaegeuk Kim ClearPagePrivate(page); 1376c3850aa1SJaegeuk Kim return 1; 1377e05df3b1SJaegeuk Kim } 1378e05df3b1SJaegeuk Kim 13790a8165d7SJaegeuk Kim /* 1380e05df3b1SJaegeuk Kim * Structure of the f2fs node operations 1381e05df3b1SJaegeuk Kim */ 1382e05df3b1SJaegeuk Kim const struct address_space_operations f2fs_node_aops = { 1383e05df3b1SJaegeuk Kim .writepage = f2fs_write_node_page, 1384e05df3b1SJaegeuk Kim .writepages = f2fs_write_node_pages, 1385e05df3b1SJaegeuk Kim .set_page_dirty = f2fs_set_node_page_dirty, 1386e05df3b1SJaegeuk Kim .invalidatepage = f2fs_invalidate_node_page, 1387e05df3b1SJaegeuk Kim .releasepage = f2fs_release_node_page, 1388e05df3b1SJaegeuk Kim }; 1389e05df3b1SJaegeuk Kim 13908a7ed66aSJaegeuk Kim static struct free_nid *__lookup_free_nid_list(struct f2fs_nm_info *nm_i, 13918a7ed66aSJaegeuk Kim nid_t n) 1392e05df3b1SJaegeuk Kim { 13938a7ed66aSJaegeuk Kim return radix_tree_lookup(&nm_i->free_nid_root, n); 13943aa770a9SNamjae Jeon } 1395e05df3b1SJaegeuk Kim 13968a7ed66aSJaegeuk Kim static void __del_from_free_nid_list(struct f2fs_nm_info *nm_i, 13978a7ed66aSJaegeuk Kim struct free_nid *i) 1398e05df3b1SJaegeuk Kim { 1399e05df3b1SJaegeuk Kim list_del(&i->list); 14008a7ed66aSJaegeuk Kim radix_tree_delete(&nm_i->free_nid_root, i->nid); 1401e05df3b1SJaegeuk Kim } 1402e05df3b1SJaegeuk Kim 14036fb03f3aSJaegeuk Kim static int add_free_nid(struct f2fs_sb_info *sbi, nid_t nid, bool build) 1404e05df3b1SJaegeuk Kim { 14056fb03f3aSJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1406e05df3b1SJaegeuk Kim struct free_nid *i; 140759bbd474SJaegeuk Kim struct nat_entry *ne; 140859bbd474SJaegeuk Kim bool allocated = false; 1409e05df3b1SJaegeuk Kim 14106fb03f3aSJaegeuk Kim if (!available_free_memory(sbi, FREE_NIDS)) 141123d38844SHaicheng Li return -1; 14129198acebSJaegeuk Kim 14139198acebSJaegeuk Kim /* 0 nid should not be used */ 1414cfb271d4SChao Yu if (unlikely(nid == 0)) 14159198acebSJaegeuk Kim return 0; 141659bbd474SJaegeuk Kim 14177bd59381SGu Zheng if (build) { 141859bbd474SJaegeuk Kim /* do not add allocated nids */ 14198b26ef98SJaegeuk Kim down_read(&nm_i->nat_tree_lock); 142059bbd474SJaegeuk Kim ne = __lookup_nat_cache(nm_i, nid); 14218a7ed66aSJaegeuk Kim if (ne && 14227ef35e3bSJaegeuk Kim (!get_nat_flag(ne, IS_CHECKPOINTED) || 14237ef35e3bSJaegeuk Kim nat_get_blkaddr(ne) != NULL_ADDR)) 142459bbd474SJaegeuk Kim allocated = true; 14258b26ef98SJaegeuk Kim up_read(&nm_i->nat_tree_lock); 142659bbd474SJaegeuk Kim if (allocated) 142759bbd474SJaegeuk Kim return 0; 1428e05df3b1SJaegeuk Kim } 14297bd59381SGu Zheng 14307bd59381SGu Zheng i = f2fs_kmem_cache_alloc(free_nid_slab, GFP_NOFS); 1431e05df3b1SJaegeuk Kim i->nid = nid; 1432e05df3b1SJaegeuk Kim i->state = NID_NEW; 1433e05df3b1SJaegeuk Kim 1434769ec6e5SJaegeuk Kim if (radix_tree_preload(GFP_NOFS)) { 1435769ec6e5SJaegeuk Kim kmem_cache_free(free_nid_slab, i); 1436769ec6e5SJaegeuk Kim return 0; 1437769ec6e5SJaegeuk Kim } 1438769ec6e5SJaegeuk Kim 1439e05df3b1SJaegeuk Kim spin_lock(&nm_i->free_nid_list_lock); 14408a7ed66aSJaegeuk Kim if (radix_tree_insert(&nm_i->free_nid_root, i->nid, i)) { 1441e05df3b1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1442769ec6e5SJaegeuk Kim radix_tree_preload_end(); 1443e05df3b1SJaegeuk Kim kmem_cache_free(free_nid_slab, i); 1444e05df3b1SJaegeuk Kim return 0; 1445e05df3b1SJaegeuk Kim } 1446e05df3b1SJaegeuk Kim list_add_tail(&i->list, &nm_i->free_nid_list); 1447e05df3b1SJaegeuk Kim nm_i->fcnt++; 1448e05df3b1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1449769ec6e5SJaegeuk Kim radix_tree_preload_end(); 1450e05df3b1SJaegeuk Kim return 1; 1451e05df3b1SJaegeuk Kim } 1452e05df3b1SJaegeuk Kim 1453e05df3b1SJaegeuk Kim static void remove_free_nid(struct f2fs_nm_info *nm_i, nid_t nid) 1454e05df3b1SJaegeuk Kim { 1455e05df3b1SJaegeuk Kim struct free_nid *i; 1456cf0ee0f0SChao Yu bool need_free = false; 1457cf0ee0f0SChao Yu 1458e05df3b1SJaegeuk Kim spin_lock(&nm_i->free_nid_list_lock); 14598a7ed66aSJaegeuk Kim i = __lookup_free_nid_list(nm_i, nid); 1460e05df3b1SJaegeuk Kim if (i && i->state == NID_NEW) { 14618a7ed66aSJaegeuk Kim __del_from_free_nid_list(nm_i, i); 1462e05df3b1SJaegeuk Kim nm_i->fcnt--; 1463cf0ee0f0SChao Yu need_free = true; 1464e05df3b1SJaegeuk Kim } 1465e05df3b1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1466cf0ee0f0SChao Yu 1467cf0ee0f0SChao Yu if (need_free) 1468cf0ee0f0SChao Yu kmem_cache_free(free_nid_slab, i); 1469e05df3b1SJaegeuk Kim } 1470e05df3b1SJaegeuk Kim 14716fb03f3aSJaegeuk Kim static void scan_nat_page(struct f2fs_sb_info *sbi, 1472e05df3b1SJaegeuk Kim struct page *nat_page, nid_t start_nid) 1473e05df3b1SJaegeuk Kim { 14746fb03f3aSJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1475e05df3b1SJaegeuk Kim struct f2fs_nat_block *nat_blk = page_address(nat_page); 1476e05df3b1SJaegeuk Kim block_t blk_addr; 1477e05df3b1SJaegeuk Kim int i; 1478e05df3b1SJaegeuk Kim 1479e05df3b1SJaegeuk Kim i = start_nid % NAT_ENTRY_PER_BLOCK; 1480e05df3b1SJaegeuk Kim 1481e05df3b1SJaegeuk Kim for (; i < NAT_ENTRY_PER_BLOCK; i++, start_nid++) { 148223d38844SHaicheng Li 1483cfb271d4SChao Yu if (unlikely(start_nid >= nm_i->max_nid)) 148404431c44SJaegeuk Kim break; 148523d38844SHaicheng Li 1486e05df3b1SJaegeuk Kim blk_addr = le32_to_cpu(nat_blk->entries[i].block_addr); 14879850cf4aSJaegeuk Kim f2fs_bug_on(sbi, blk_addr == NEW_ADDR); 148823d38844SHaicheng Li if (blk_addr == NULL_ADDR) { 14896fb03f3aSJaegeuk Kim if (add_free_nid(sbi, start_nid, true) < 0) 149023d38844SHaicheng Li break; 149123d38844SHaicheng Li } 1492e05df3b1SJaegeuk Kim } 1493e05df3b1SJaegeuk Kim } 1494e05df3b1SJaegeuk Kim 1495e05df3b1SJaegeuk Kim static void build_free_nids(struct f2fs_sb_info *sbi) 1496e05df3b1SJaegeuk Kim { 1497e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1498e05df3b1SJaegeuk Kim struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); 1499e05df3b1SJaegeuk Kim struct f2fs_summary_block *sum = curseg->sum_blk; 15008760952dSHaicheng Li int i = 0; 150155008d84SJaegeuk Kim nid_t nid = nm_i->next_scan_nid; 1502e05df3b1SJaegeuk Kim 150355008d84SJaegeuk Kim /* Enough entries */ 150455008d84SJaegeuk Kim if (nm_i->fcnt > NAT_ENTRY_PER_BLOCK) 150555008d84SJaegeuk Kim return; 1506e05df3b1SJaegeuk Kim 150755008d84SJaegeuk Kim /* readahead nat pages to be scanned */ 1508662befdaSChao Yu ra_meta_pages(sbi, NAT_BLOCK_OFFSET(nid), FREE_NID_PAGES, META_NAT); 1509e05df3b1SJaegeuk Kim 1510e05df3b1SJaegeuk Kim while (1) { 1511e05df3b1SJaegeuk Kim struct page *page = get_current_nat_page(sbi, nid); 1512e05df3b1SJaegeuk Kim 15136fb03f3aSJaegeuk Kim scan_nat_page(sbi, page, nid); 1514e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 1515e05df3b1SJaegeuk Kim 1516e05df3b1SJaegeuk Kim nid += (NAT_ENTRY_PER_BLOCK - (nid % NAT_ENTRY_PER_BLOCK)); 1517cfb271d4SChao Yu if (unlikely(nid >= nm_i->max_nid)) 1518e05df3b1SJaegeuk Kim nid = 0; 151955008d84SJaegeuk Kim 152055008d84SJaegeuk Kim if (i++ == FREE_NID_PAGES) 1521e05df3b1SJaegeuk Kim break; 1522e05df3b1SJaegeuk Kim } 1523e05df3b1SJaegeuk Kim 152455008d84SJaegeuk Kim /* go to the next free nat pages to find free nids abundantly */ 152555008d84SJaegeuk Kim nm_i->next_scan_nid = nid; 1526e05df3b1SJaegeuk Kim 1527e05df3b1SJaegeuk Kim /* find free nids from current sum_pages */ 1528e05df3b1SJaegeuk Kim mutex_lock(&curseg->curseg_mutex); 1529e05df3b1SJaegeuk Kim for (i = 0; i < nats_in_cursum(sum); i++) { 1530e05df3b1SJaegeuk Kim block_t addr = le32_to_cpu(nat_in_journal(sum, i).block_addr); 1531e05df3b1SJaegeuk Kim nid = le32_to_cpu(nid_in_journal(sum, i)); 1532e05df3b1SJaegeuk Kim if (addr == NULL_ADDR) 15336fb03f3aSJaegeuk Kim add_free_nid(sbi, nid, true); 1534e05df3b1SJaegeuk Kim else 1535e05df3b1SJaegeuk Kim remove_free_nid(nm_i, nid); 1536e05df3b1SJaegeuk Kim } 1537e05df3b1SJaegeuk Kim mutex_unlock(&curseg->curseg_mutex); 1538e05df3b1SJaegeuk Kim } 1539e05df3b1SJaegeuk Kim 1540e05df3b1SJaegeuk Kim /* 1541e05df3b1SJaegeuk Kim * If this function returns success, caller can obtain a new nid 1542e05df3b1SJaegeuk Kim * from second parameter of this function. 1543e05df3b1SJaegeuk Kim * The returned nid could be used ino as well as nid when inode is created. 1544e05df3b1SJaegeuk Kim */ 1545e05df3b1SJaegeuk Kim bool alloc_nid(struct f2fs_sb_info *sbi, nid_t *nid) 1546e05df3b1SJaegeuk Kim { 1547e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1548e05df3b1SJaegeuk Kim struct free_nid *i = NULL; 1549e05df3b1SJaegeuk Kim retry: 15507ee0eeabSJaegeuk Kim if (unlikely(sbi->total_valid_node_count + 1 > nm_i->available_nids)) 1551e05df3b1SJaegeuk Kim return false; 1552e05df3b1SJaegeuk Kim 1553e05df3b1SJaegeuk Kim spin_lock(&nm_i->free_nid_list_lock); 1554e05df3b1SJaegeuk Kim 155555008d84SJaegeuk Kim /* We should not use stale free nids created by build_free_nids */ 1556f978f5a0SGu Zheng if (nm_i->fcnt && !on_build_free_nids(nm_i)) { 15579850cf4aSJaegeuk Kim f2fs_bug_on(sbi, list_empty(&nm_i->free_nid_list)); 15582d7b822aSChao Yu list_for_each_entry(i, &nm_i->free_nid_list, list) 1559e05df3b1SJaegeuk Kim if (i->state == NID_NEW) 1560e05df3b1SJaegeuk Kim break; 1561e05df3b1SJaegeuk Kim 15629850cf4aSJaegeuk Kim f2fs_bug_on(sbi, i->state != NID_NEW); 1563e05df3b1SJaegeuk Kim *nid = i->nid; 1564e05df3b1SJaegeuk Kim i->state = NID_ALLOC; 1565e05df3b1SJaegeuk Kim nm_i->fcnt--; 1566e05df3b1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1567e05df3b1SJaegeuk Kim return true; 1568e05df3b1SJaegeuk Kim } 156955008d84SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 157055008d84SJaegeuk Kim 157155008d84SJaegeuk Kim /* Let's scan nat pages and its caches to get free nids */ 157255008d84SJaegeuk Kim mutex_lock(&nm_i->build_lock); 157355008d84SJaegeuk Kim build_free_nids(sbi); 157455008d84SJaegeuk Kim mutex_unlock(&nm_i->build_lock); 157555008d84SJaegeuk Kim goto retry; 157655008d84SJaegeuk Kim } 1577e05df3b1SJaegeuk Kim 15780a8165d7SJaegeuk Kim /* 1579e05df3b1SJaegeuk Kim * alloc_nid() should be called prior to this function. 1580e05df3b1SJaegeuk Kim */ 1581e05df3b1SJaegeuk Kim void alloc_nid_done(struct f2fs_sb_info *sbi, nid_t nid) 1582e05df3b1SJaegeuk Kim { 1583e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1584e05df3b1SJaegeuk Kim struct free_nid *i; 1585e05df3b1SJaegeuk Kim 1586e05df3b1SJaegeuk Kim spin_lock(&nm_i->free_nid_list_lock); 15878a7ed66aSJaegeuk Kim i = __lookup_free_nid_list(nm_i, nid); 15889850cf4aSJaegeuk Kim f2fs_bug_on(sbi, !i || i->state != NID_ALLOC); 15898a7ed66aSJaegeuk Kim __del_from_free_nid_list(nm_i, i); 1590e05df3b1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1591cf0ee0f0SChao Yu 1592cf0ee0f0SChao Yu kmem_cache_free(free_nid_slab, i); 1593e05df3b1SJaegeuk Kim } 1594e05df3b1SJaegeuk Kim 15950a8165d7SJaegeuk Kim /* 1596e05df3b1SJaegeuk Kim * alloc_nid() should be called prior to this function. 1597e05df3b1SJaegeuk Kim */ 1598e05df3b1SJaegeuk Kim void alloc_nid_failed(struct f2fs_sb_info *sbi, nid_t nid) 1599e05df3b1SJaegeuk Kim { 160049952fa1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 160149952fa1SJaegeuk Kim struct free_nid *i; 1602cf0ee0f0SChao Yu bool need_free = false; 160349952fa1SJaegeuk Kim 160465985d93SJaegeuk Kim if (!nid) 160565985d93SJaegeuk Kim return; 160665985d93SJaegeuk Kim 160749952fa1SJaegeuk Kim spin_lock(&nm_i->free_nid_list_lock); 16088a7ed66aSJaegeuk Kim i = __lookup_free_nid_list(nm_i, nid); 16099850cf4aSJaegeuk Kim f2fs_bug_on(sbi, !i || i->state != NID_ALLOC); 16106fb03f3aSJaegeuk Kim if (!available_free_memory(sbi, FREE_NIDS)) { 16118a7ed66aSJaegeuk Kim __del_from_free_nid_list(nm_i, i); 1612cf0ee0f0SChao Yu need_free = true; 161395630cbaSHaicheng Li } else { 161449952fa1SJaegeuk Kim i->state = NID_NEW; 161549952fa1SJaegeuk Kim nm_i->fcnt++; 161695630cbaSHaicheng Li } 161749952fa1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1618cf0ee0f0SChao Yu 1619cf0ee0f0SChao Yu if (need_free) 1620cf0ee0f0SChao Yu kmem_cache_free(free_nid_slab, i); 1621e05df3b1SJaegeuk Kim } 1622e05df3b1SJaegeuk Kim 162370cfed88SChao Yu void recover_inline_xattr(struct inode *inode, struct page *page) 162428cdce04SChao Yu { 162528cdce04SChao Yu void *src_addr, *dst_addr; 162628cdce04SChao Yu size_t inline_size; 162728cdce04SChao Yu struct page *ipage; 162828cdce04SChao Yu struct f2fs_inode *ri; 162928cdce04SChao Yu 16304081363fSJaegeuk Kim ipage = get_node_page(F2FS_I_SB(inode), inode->i_ino); 16319850cf4aSJaegeuk Kim f2fs_bug_on(F2FS_I_SB(inode), IS_ERR(ipage)); 163228cdce04SChao Yu 1633e3b4d43fSJaegeuk Kim ri = F2FS_INODE(page); 1634e3b4d43fSJaegeuk Kim if (!(ri->i_inline & F2FS_INLINE_XATTR)) { 1635e3b4d43fSJaegeuk Kim clear_inode_flag(F2FS_I(inode), FI_INLINE_XATTR); 1636e3b4d43fSJaegeuk Kim goto update_inode; 1637e3b4d43fSJaegeuk Kim } 1638e3b4d43fSJaegeuk Kim 163928cdce04SChao Yu dst_addr = inline_xattr_addr(ipage); 164028cdce04SChao Yu src_addr = inline_xattr_addr(page); 164128cdce04SChao Yu inline_size = inline_xattr_size(inode); 164228cdce04SChao Yu 164354b591dfSJaegeuk Kim f2fs_wait_on_page_writeback(ipage, NODE); 164428cdce04SChao Yu memcpy(dst_addr, src_addr, inline_size); 1645e3b4d43fSJaegeuk Kim update_inode: 164628cdce04SChao Yu update_inode(inode, ipage); 164728cdce04SChao Yu f2fs_put_page(ipage, 1); 164828cdce04SChao Yu } 164928cdce04SChao Yu 16501c35a90eSJaegeuk Kim void recover_xattr_data(struct inode *inode, struct page *page, block_t blkaddr) 1651abb2366cSJaegeuk Kim { 16524081363fSJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 1653abb2366cSJaegeuk Kim nid_t prev_xnid = F2FS_I(inode)->i_xattr_nid; 1654abb2366cSJaegeuk Kim nid_t new_xnid = nid_of_node(page); 1655abb2366cSJaegeuk Kim struct node_info ni; 1656abb2366cSJaegeuk Kim 1657abb2366cSJaegeuk Kim /* 1: invalidate the previous xattr nid */ 1658abb2366cSJaegeuk Kim if (!prev_xnid) 1659abb2366cSJaegeuk Kim goto recover_xnid; 1660abb2366cSJaegeuk Kim 1661abb2366cSJaegeuk Kim /* Deallocate node address */ 1662abb2366cSJaegeuk Kim get_node_info(sbi, prev_xnid, &ni); 16639850cf4aSJaegeuk Kim f2fs_bug_on(sbi, ni.blk_addr == NULL_ADDR); 1664abb2366cSJaegeuk Kim invalidate_blocks(sbi, ni.blk_addr); 1665abb2366cSJaegeuk Kim dec_valid_node_count(sbi, inode); 1666479f40c4SJaegeuk Kim set_node_addr(sbi, &ni, NULL_ADDR, false); 1667abb2366cSJaegeuk Kim 1668abb2366cSJaegeuk Kim recover_xnid: 1669abb2366cSJaegeuk Kim /* 2: allocate new xattr nid */ 1670abb2366cSJaegeuk Kim if (unlikely(!inc_valid_node_count(sbi, inode))) 16719850cf4aSJaegeuk Kim f2fs_bug_on(sbi, 1); 1672abb2366cSJaegeuk Kim 1673abb2366cSJaegeuk Kim remove_free_nid(NM_I(sbi), new_xnid); 1674abb2366cSJaegeuk Kim get_node_info(sbi, new_xnid, &ni); 1675abb2366cSJaegeuk Kim ni.ino = inode->i_ino; 1676479f40c4SJaegeuk Kim set_node_addr(sbi, &ni, NEW_ADDR, false); 1677abb2366cSJaegeuk Kim F2FS_I(inode)->i_xattr_nid = new_xnid; 1678abb2366cSJaegeuk Kim 1679abb2366cSJaegeuk Kim /* 3: update xattr blkaddr */ 1680abb2366cSJaegeuk Kim refresh_sit_entry(sbi, NEW_ADDR, blkaddr); 1681479f40c4SJaegeuk Kim set_node_addr(sbi, &ni, blkaddr, false); 1682abb2366cSJaegeuk Kim 1683abb2366cSJaegeuk Kim update_inode_page(inode); 1684abb2366cSJaegeuk Kim } 1685abb2366cSJaegeuk Kim 1686e05df3b1SJaegeuk Kim int recover_inode_page(struct f2fs_sb_info *sbi, struct page *page) 1687e05df3b1SJaegeuk Kim { 168858bfaf44SJaegeuk Kim struct f2fs_inode *src, *dst; 1689e05df3b1SJaegeuk Kim nid_t ino = ino_of_node(page); 1690e05df3b1SJaegeuk Kim struct node_info old_ni, new_ni; 1691e05df3b1SJaegeuk Kim struct page *ipage; 1692e05df3b1SJaegeuk Kim 1693e8271fa3SJaegeuk Kim get_node_info(sbi, ino, &old_ni); 1694e8271fa3SJaegeuk Kim 1695e8271fa3SJaegeuk Kim if (unlikely(old_ni.blk_addr != NULL_ADDR)) 1696e8271fa3SJaegeuk Kim return -EINVAL; 1697e8271fa3SJaegeuk Kim 16984ef51a8fSJaegeuk Kim ipage = grab_cache_page(NODE_MAPPING(sbi), ino); 1699e05df3b1SJaegeuk Kim if (!ipage) 1700e05df3b1SJaegeuk Kim return -ENOMEM; 1701e05df3b1SJaegeuk Kim 1702e05df3b1SJaegeuk Kim /* Should not use this inode from free nid list */ 1703e05df3b1SJaegeuk Kim remove_free_nid(NM_I(sbi), ino); 1704e05df3b1SJaegeuk Kim 1705e05df3b1SJaegeuk Kim SetPageUptodate(ipage); 1706e05df3b1SJaegeuk Kim fill_node_footer(ipage, ino, ino, 0, true); 1707e05df3b1SJaegeuk Kim 170858bfaf44SJaegeuk Kim src = F2FS_INODE(page); 170958bfaf44SJaegeuk Kim dst = F2FS_INODE(ipage); 1710e05df3b1SJaegeuk Kim 171158bfaf44SJaegeuk Kim memcpy(dst, src, (unsigned long)&src->i_ext - (unsigned long)src); 171258bfaf44SJaegeuk Kim dst->i_size = 0; 171358bfaf44SJaegeuk Kim dst->i_blocks = cpu_to_le64(1); 171458bfaf44SJaegeuk Kim dst->i_links = cpu_to_le32(1); 171558bfaf44SJaegeuk Kim dst->i_xattr_nid = 0; 1716617deb8cSJaegeuk Kim dst->i_inline = src->i_inline & F2FS_INLINE_XATTR; 1717e05df3b1SJaegeuk Kim 1718e05df3b1SJaegeuk Kim new_ni = old_ni; 1719e05df3b1SJaegeuk Kim new_ni.ino = ino; 1720e05df3b1SJaegeuk Kim 1721cfb271d4SChao Yu if (unlikely(!inc_valid_node_count(sbi, NULL))) 172265e5cd0aSJaegeuk Kim WARN_ON(1); 1723479f40c4SJaegeuk Kim set_node_addr(sbi, &new_ni, NEW_ADDR, false); 1724e05df3b1SJaegeuk Kim inc_valid_inode_count(sbi); 1725617deb8cSJaegeuk Kim set_page_dirty(ipage); 1726e05df3b1SJaegeuk Kim f2fs_put_page(ipage, 1); 1727e05df3b1SJaegeuk Kim return 0; 1728e05df3b1SJaegeuk Kim } 1729e05df3b1SJaegeuk Kim 1730e05df3b1SJaegeuk Kim int restore_node_summary(struct f2fs_sb_info *sbi, 1731e05df3b1SJaegeuk Kim unsigned int segno, struct f2fs_summary_block *sum) 1732e05df3b1SJaegeuk Kim { 1733e05df3b1SJaegeuk Kim struct f2fs_node *rn; 1734e05df3b1SJaegeuk Kim struct f2fs_summary *sum_entry; 1735e05df3b1SJaegeuk Kim block_t addr; 173690a893c7SJaegeuk Kim int bio_blocks = MAX_BIO_BLOCKS(sbi); 17379ecf4b80SChao Yu int i, idx, last_offset, nrpages; 1738e05df3b1SJaegeuk Kim 1739e05df3b1SJaegeuk Kim /* scan the node segment */ 1740e05df3b1SJaegeuk Kim last_offset = sbi->blocks_per_seg; 1741e05df3b1SJaegeuk Kim addr = START_BLOCK(sbi, segno); 1742e05df3b1SJaegeuk Kim sum_entry = &sum->entries[0]; 1743e05df3b1SJaegeuk Kim 17449ecf4b80SChao Yu for (i = 0; i < last_offset; i += nrpages, addr += nrpages) { 17459af0ff1cSChao Yu nrpages = min(last_offset - i, bio_blocks); 1746393ff91fSJaegeuk Kim 17479af0ff1cSChao Yu /* readahead node pages */ 17489ecf4b80SChao Yu ra_meta_pages(sbi, addr, nrpages, META_POR); 17499af0ff1cSChao Yu 17509ecf4b80SChao Yu for (idx = addr; idx < addr + nrpages; idx++) { 17519ecf4b80SChao Yu struct page *page = get_meta_page(sbi, idx); 1752393ff91fSJaegeuk Kim 17539ecf4b80SChao Yu rn = F2FS_NODE(page); 1754393ff91fSJaegeuk Kim sum_entry->nid = rn->footer.nid; 1755393ff91fSJaegeuk Kim sum_entry->version = 0; 1756393ff91fSJaegeuk Kim sum_entry->ofs_in_node = 0; 17579af0ff1cSChao Yu sum_entry++; 17589ecf4b80SChao Yu f2fs_put_page(page, 1); 17599af0ff1cSChao Yu } 1760bac4eef6SChao Yu 17619ecf4b80SChao Yu invalidate_mapping_pages(META_MAPPING(sbi), addr, 1762bac4eef6SChao Yu addr + nrpages); 17639af0ff1cSChao Yu } 17649ecf4b80SChao Yu return 0; 1765e05df3b1SJaegeuk Kim } 1766e05df3b1SJaegeuk Kim 1767aec71382SChao Yu static void remove_nats_in_journal(struct f2fs_sb_info *sbi) 1768e05df3b1SJaegeuk Kim { 1769e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1770e05df3b1SJaegeuk Kim struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); 1771e05df3b1SJaegeuk Kim struct f2fs_summary_block *sum = curseg->sum_blk; 1772e05df3b1SJaegeuk Kim int i; 1773e05df3b1SJaegeuk Kim 1774e05df3b1SJaegeuk Kim mutex_lock(&curseg->curseg_mutex); 1775e05df3b1SJaegeuk Kim for (i = 0; i < nats_in_cursum(sum); i++) { 1776e05df3b1SJaegeuk Kim struct nat_entry *ne; 1777e05df3b1SJaegeuk Kim struct f2fs_nat_entry raw_ne; 1778e05df3b1SJaegeuk Kim nid_t nid = le32_to_cpu(nid_in_journal(sum, i)); 1779e05df3b1SJaegeuk Kim 1780e05df3b1SJaegeuk Kim raw_ne = nat_in_journal(sum, i); 17819be32d72SJaegeuk Kim 17828b26ef98SJaegeuk Kim down_write(&nm_i->nat_tree_lock); 1783e05df3b1SJaegeuk Kim ne = __lookup_nat_cache(nm_i, nid); 1784e05df3b1SJaegeuk Kim if (!ne) { 17859be32d72SJaegeuk Kim ne = grab_nat_entry(nm_i, nid); 178694dac22eSChao Yu node_info_from_raw_nat(&ne->ni, &raw_ne); 17879be32d72SJaegeuk Kim } 1788e05df3b1SJaegeuk Kim __set_nat_cache_dirty(nm_i, ne); 17898b26ef98SJaegeuk Kim up_write(&nm_i->nat_tree_lock); 1790e05df3b1SJaegeuk Kim } 1791e05df3b1SJaegeuk Kim update_nats_in_cursum(sum, -i); 1792e05df3b1SJaegeuk Kim mutex_unlock(&curseg->curseg_mutex); 1793e05df3b1SJaegeuk Kim } 1794e05df3b1SJaegeuk Kim 1795309cc2b6SJaegeuk Kim static void __adjust_nat_entry_set(struct nat_entry_set *nes, 1796309cc2b6SJaegeuk Kim struct list_head *head, int max) 1797e05df3b1SJaegeuk Kim { 1798309cc2b6SJaegeuk Kim struct nat_entry_set *cur; 1799e05df3b1SJaegeuk Kim 1800309cc2b6SJaegeuk Kim if (nes->entry_cnt >= max) 1801309cc2b6SJaegeuk Kim goto add_out; 1802e05df3b1SJaegeuk Kim 1803309cc2b6SJaegeuk Kim list_for_each_entry(cur, head, set_list) { 1804309cc2b6SJaegeuk Kim if (cur->entry_cnt >= nes->entry_cnt) { 1805309cc2b6SJaegeuk Kim list_add(&nes->set_list, cur->set_list.prev); 1806309cc2b6SJaegeuk Kim return; 1807309cc2b6SJaegeuk Kim } 1808309cc2b6SJaegeuk Kim } 1809309cc2b6SJaegeuk Kim add_out: 1810309cc2b6SJaegeuk Kim list_add_tail(&nes->set_list, head); 1811aec71382SChao Yu } 1812aec71382SChao Yu 1813309cc2b6SJaegeuk Kim static void __flush_nat_entry_set(struct f2fs_sb_info *sbi, 1814309cc2b6SJaegeuk Kim struct nat_entry_set *set) 1815309cc2b6SJaegeuk Kim { 1816309cc2b6SJaegeuk Kim struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); 1817309cc2b6SJaegeuk Kim struct f2fs_summary_block *sum = curseg->sum_blk; 1818309cc2b6SJaegeuk Kim nid_t start_nid = set->set * NAT_ENTRY_PER_BLOCK; 1819309cc2b6SJaegeuk Kim bool to_journal = true; 1820309cc2b6SJaegeuk Kim struct f2fs_nat_block *nat_blk; 1821309cc2b6SJaegeuk Kim struct nat_entry *ne, *cur; 1822309cc2b6SJaegeuk Kim struct page *page = NULL; 1823aec71382SChao Yu 1824aec71382SChao Yu /* 1825aec71382SChao Yu * there are two steps to flush nat entries: 1826aec71382SChao Yu * #1, flush nat entries to journal in current hot data summary block. 1827aec71382SChao Yu * #2, flush nat entries to nat page. 1828aec71382SChao Yu */ 1829309cc2b6SJaegeuk Kim if (!__has_cursum_space(sum, set->entry_cnt, NAT_JOURNAL)) 1830aec71382SChao Yu to_journal = false; 1831aec71382SChao Yu 1832aec71382SChao Yu if (to_journal) { 1833aec71382SChao Yu mutex_lock(&curseg->curseg_mutex); 1834aec71382SChao Yu } else { 1835e05df3b1SJaegeuk Kim page = get_next_nat_page(sbi, start_nid); 1836e05df3b1SJaegeuk Kim nat_blk = page_address(page); 18379850cf4aSJaegeuk Kim f2fs_bug_on(sbi, !nat_blk); 1838e05df3b1SJaegeuk Kim } 1839e05df3b1SJaegeuk Kim 1840aec71382SChao Yu /* flush dirty nats in nat entry set */ 1841309cc2b6SJaegeuk Kim list_for_each_entry_safe(ne, cur, &set->entry_list, list) { 1842aec71382SChao Yu struct f2fs_nat_entry *raw_ne; 1843aec71382SChao Yu nid_t nid = nat_get_nid(ne); 1844aec71382SChao Yu int offset; 1845aec71382SChao Yu 1846309cc2b6SJaegeuk Kim if (nat_get_blkaddr(ne) == NEW_ADDR) 1847309cc2b6SJaegeuk Kim continue; 1848309cc2b6SJaegeuk Kim 1849aec71382SChao Yu if (to_journal) { 1850aec71382SChao Yu offset = lookup_journal_in_cursum(sum, 1851aec71382SChao Yu NAT_JOURNAL, nid, 1); 18529850cf4aSJaegeuk Kim f2fs_bug_on(sbi, offset < 0); 1853aec71382SChao Yu raw_ne = &nat_in_journal(sum, offset); 1854aec71382SChao Yu nid_in_journal(sum, offset) = cpu_to_le32(nid); 1855aec71382SChao Yu } else { 1856aec71382SChao Yu raw_ne = &nat_blk->entries[nid - start_nid]; 1857aec71382SChao Yu } 1858aec71382SChao Yu raw_nat_from_node_info(raw_ne, &ne->ni); 1859aec71382SChao Yu 18608b26ef98SJaegeuk Kim down_write(&NM_I(sbi)->nat_tree_lock); 186188bd02c9SJaegeuk Kim nat_reset_flag(ne); 1862309cc2b6SJaegeuk Kim __clear_nat_cache_dirty(NM_I(sbi), ne); 18638b26ef98SJaegeuk Kim up_write(&NM_I(sbi)->nat_tree_lock); 1864309cc2b6SJaegeuk Kim 1865309cc2b6SJaegeuk Kim if (nat_get_blkaddr(ne) == NULL_ADDR) 1866309cc2b6SJaegeuk Kim add_free_nid(sbi, nid, false); 1867e05df3b1SJaegeuk Kim } 1868aec71382SChao Yu 1869aec71382SChao Yu if (to_journal) 1870e05df3b1SJaegeuk Kim mutex_unlock(&curseg->curseg_mutex); 1871aec71382SChao Yu else 1872e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 1873aec71382SChao Yu 187480ec2e91SChangman Lee f2fs_bug_on(sbi, set->entry_cnt); 187580ec2e91SChangman Lee 1876309cc2b6SJaegeuk Kim radix_tree_delete(&NM_I(sbi)->nat_set_root, set->set); 1877309cc2b6SJaegeuk Kim kmem_cache_free(nat_entry_set_slab, set); 1878309cc2b6SJaegeuk Kim } 1879aec71382SChao Yu 1880309cc2b6SJaegeuk Kim /* 1881309cc2b6SJaegeuk Kim * This function is called during the checkpointing process. 1882309cc2b6SJaegeuk Kim */ 1883309cc2b6SJaegeuk Kim void flush_nat_entries(struct f2fs_sb_info *sbi) 1884309cc2b6SJaegeuk Kim { 1885309cc2b6SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1886309cc2b6SJaegeuk Kim struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); 1887309cc2b6SJaegeuk Kim struct f2fs_summary_block *sum = curseg->sum_blk; 1888309cc2b6SJaegeuk Kim struct nat_entry_set *setvec[NATVEC_SIZE]; 1889309cc2b6SJaegeuk Kim struct nat_entry_set *set, *tmp; 1890309cc2b6SJaegeuk Kim unsigned int found; 1891309cc2b6SJaegeuk Kim nid_t set_idx = 0; 1892309cc2b6SJaegeuk Kim LIST_HEAD(sets); 1893309cc2b6SJaegeuk Kim 189420d047c8SChangman Lee if (!nm_i->dirty_nat_cnt) 189520d047c8SChangman Lee return; 1896309cc2b6SJaegeuk Kim /* 1897309cc2b6SJaegeuk Kim * if there are no enough space in journal to store dirty nat 1898309cc2b6SJaegeuk Kim * entries, remove all entries from journal and merge them 1899309cc2b6SJaegeuk Kim * into nat entry set. 1900309cc2b6SJaegeuk Kim */ 1901309cc2b6SJaegeuk Kim if (!__has_cursum_space(sum, nm_i->dirty_nat_cnt, NAT_JOURNAL)) 1902309cc2b6SJaegeuk Kim remove_nats_in_journal(sbi); 1903309cc2b6SJaegeuk Kim 1904309cc2b6SJaegeuk Kim while ((found = __gang_lookup_nat_set(nm_i, 1905309cc2b6SJaegeuk Kim set_idx, NATVEC_SIZE, setvec))) { 1906309cc2b6SJaegeuk Kim unsigned idx; 1907309cc2b6SJaegeuk Kim set_idx = setvec[found - 1]->set + 1; 1908309cc2b6SJaegeuk Kim for (idx = 0; idx < found; idx++) 1909309cc2b6SJaegeuk Kim __adjust_nat_entry_set(setvec[idx], &sets, 1910309cc2b6SJaegeuk Kim MAX_NAT_JENTRIES(sum)); 1911309cc2b6SJaegeuk Kim } 1912309cc2b6SJaegeuk Kim 1913309cc2b6SJaegeuk Kim /* flush dirty nats in nat entry set */ 1914309cc2b6SJaegeuk Kim list_for_each_entry_safe(set, tmp, &sets, set_list) 1915309cc2b6SJaegeuk Kim __flush_nat_entry_set(sbi, set); 1916309cc2b6SJaegeuk Kim 19179850cf4aSJaegeuk Kim f2fs_bug_on(sbi, nm_i->dirty_nat_cnt); 1918e05df3b1SJaegeuk Kim } 1919e05df3b1SJaegeuk Kim 1920e05df3b1SJaegeuk Kim static int init_node_manager(struct f2fs_sb_info *sbi) 1921e05df3b1SJaegeuk Kim { 1922e05df3b1SJaegeuk Kim struct f2fs_super_block *sb_raw = F2FS_RAW_SUPER(sbi); 1923e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1924e05df3b1SJaegeuk Kim unsigned char *version_bitmap; 1925e05df3b1SJaegeuk Kim unsigned int nat_segs, nat_blocks; 1926e05df3b1SJaegeuk Kim 1927e05df3b1SJaegeuk Kim nm_i->nat_blkaddr = le32_to_cpu(sb_raw->nat_blkaddr); 1928e05df3b1SJaegeuk Kim 1929e05df3b1SJaegeuk Kim /* segment_count_nat includes pair segment so divide to 2. */ 1930e05df3b1SJaegeuk Kim nat_segs = le32_to_cpu(sb_raw->segment_count_nat) >> 1; 1931e05df3b1SJaegeuk Kim nat_blocks = nat_segs << le32_to_cpu(sb_raw->log_blocks_per_seg); 1932b63da15eSJaegeuk Kim 19337ee0eeabSJaegeuk Kim nm_i->max_nid = NAT_ENTRY_PER_BLOCK * nat_blocks; 19347ee0eeabSJaegeuk Kim 1935b63da15eSJaegeuk Kim /* not used nids: 0, node, meta, (and root counted as valid node) */ 1936c200b1aaSChao Yu nm_i->available_nids = nm_i->max_nid - F2FS_RESERVED_NODE_NUM; 1937e05df3b1SJaegeuk Kim nm_i->fcnt = 0; 1938e05df3b1SJaegeuk Kim nm_i->nat_cnt = 0; 1939cdfc41c1SJaegeuk Kim nm_i->ram_thresh = DEF_RAM_THRESHOLD; 1940e05df3b1SJaegeuk Kim 19418a7ed66aSJaegeuk Kim INIT_RADIX_TREE(&nm_i->free_nid_root, GFP_ATOMIC); 1942e05df3b1SJaegeuk Kim INIT_LIST_HEAD(&nm_i->free_nid_list); 1943769ec6e5SJaegeuk Kim INIT_RADIX_TREE(&nm_i->nat_root, GFP_NOIO); 1944769ec6e5SJaegeuk Kim INIT_RADIX_TREE(&nm_i->nat_set_root, GFP_NOIO); 1945e05df3b1SJaegeuk Kim INIT_LIST_HEAD(&nm_i->nat_entries); 1946e05df3b1SJaegeuk Kim 1947e05df3b1SJaegeuk Kim mutex_init(&nm_i->build_lock); 1948e05df3b1SJaegeuk Kim spin_lock_init(&nm_i->free_nid_list_lock); 19498b26ef98SJaegeuk Kim init_rwsem(&nm_i->nat_tree_lock); 1950e05df3b1SJaegeuk Kim 1951e05df3b1SJaegeuk Kim nm_i->next_scan_nid = le32_to_cpu(sbi->ckpt->next_free_nid); 195279b5793bSAlexandru Gheorghiu nm_i->bitmap_size = __bitmap_size(sbi, NAT_BITMAP); 1953e05df3b1SJaegeuk Kim version_bitmap = __bitmap_ptr(sbi, NAT_BITMAP); 1954e05df3b1SJaegeuk Kim if (!version_bitmap) 1955e05df3b1SJaegeuk Kim return -EFAULT; 1956e05df3b1SJaegeuk Kim 195779b5793bSAlexandru Gheorghiu nm_i->nat_bitmap = kmemdup(version_bitmap, nm_i->bitmap_size, 195879b5793bSAlexandru Gheorghiu GFP_KERNEL); 195979b5793bSAlexandru Gheorghiu if (!nm_i->nat_bitmap) 196079b5793bSAlexandru Gheorghiu return -ENOMEM; 1961e05df3b1SJaegeuk Kim return 0; 1962e05df3b1SJaegeuk Kim } 1963e05df3b1SJaegeuk Kim 1964e05df3b1SJaegeuk Kim int build_node_manager(struct f2fs_sb_info *sbi) 1965e05df3b1SJaegeuk Kim { 1966e05df3b1SJaegeuk Kim int err; 1967e05df3b1SJaegeuk Kim 1968e05df3b1SJaegeuk Kim sbi->nm_info = kzalloc(sizeof(struct f2fs_nm_info), GFP_KERNEL); 1969e05df3b1SJaegeuk Kim if (!sbi->nm_info) 1970e05df3b1SJaegeuk Kim return -ENOMEM; 1971e05df3b1SJaegeuk Kim 1972e05df3b1SJaegeuk Kim err = init_node_manager(sbi); 1973e05df3b1SJaegeuk Kim if (err) 1974e05df3b1SJaegeuk Kim return err; 1975e05df3b1SJaegeuk Kim 1976e05df3b1SJaegeuk Kim build_free_nids(sbi); 1977e05df3b1SJaegeuk Kim return 0; 1978e05df3b1SJaegeuk Kim } 1979e05df3b1SJaegeuk Kim 1980e05df3b1SJaegeuk Kim void destroy_node_manager(struct f2fs_sb_info *sbi) 1981e05df3b1SJaegeuk Kim { 1982e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1983e05df3b1SJaegeuk Kim struct free_nid *i, *next_i; 1984e05df3b1SJaegeuk Kim struct nat_entry *natvec[NATVEC_SIZE]; 1985e05df3b1SJaegeuk Kim nid_t nid = 0; 1986e05df3b1SJaegeuk Kim unsigned int found; 1987e05df3b1SJaegeuk Kim 1988e05df3b1SJaegeuk Kim if (!nm_i) 1989e05df3b1SJaegeuk Kim return; 1990e05df3b1SJaegeuk Kim 1991e05df3b1SJaegeuk Kim /* destroy free nid list */ 1992e05df3b1SJaegeuk Kim spin_lock(&nm_i->free_nid_list_lock); 1993e05df3b1SJaegeuk Kim list_for_each_entry_safe(i, next_i, &nm_i->free_nid_list, list) { 19949850cf4aSJaegeuk Kim f2fs_bug_on(sbi, i->state == NID_ALLOC); 19958a7ed66aSJaegeuk Kim __del_from_free_nid_list(nm_i, i); 1996e05df3b1SJaegeuk Kim nm_i->fcnt--; 1997cf0ee0f0SChao Yu spin_unlock(&nm_i->free_nid_list_lock); 1998cf0ee0f0SChao Yu kmem_cache_free(free_nid_slab, i); 1999cf0ee0f0SChao Yu spin_lock(&nm_i->free_nid_list_lock); 2000e05df3b1SJaegeuk Kim } 20019850cf4aSJaegeuk Kim f2fs_bug_on(sbi, nm_i->fcnt); 2002e05df3b1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 2003e05df3b1SJaegeuk Kim 2004e05df3b1SJaegeuk Kim /* destroy nat cache */ 20058b26ef98SJaegeuk Kim down_write(&nm_i->nat_tree_lock); 2006e05df3b1SJaegeuk Kim while ((found = __gang_lookup_nat_cache(nm_i, 2007e05df3b1SJaegeuk Kim nid, NATVEC_SIZE, natvec))) { 2008e05df3b1SJaegeuk Kim unsigned idx; 2009b6ce391eSGu Zheng nid = nat_get_nid(natvec[found - 1]) + 1; 2010b6ce391eSGu Zheng for (idx = 0; idx < found; idx++) 2011b6ce391eSGu Zheng __del_from_nat_cache(nm_i, natvec[idx]); 2012e05df3b1SJaegeuk Kim } 20139850cf4aSJaegeuk Kim f2fs_bug_on(sbi, nm_i->nat_cnt); 20148b26ef98SJaegeuk Kim up_write(&nm_i->nat_tree_lock); 2015e05df3b1SJaegeuk Kim 2016e05df3b1SJaegeuk Kim kfree(nm_i->nat_bitmap); 2017e05df3b1SJaegeuk Kim sbi->nm_info = NULL; 2018e05df3b1SJaegeuk Kim kfree(nm_i); 2019e05df3b1SJaegeuk Kim } 2020e05df3b1SJaegeuk Kim 20216e6093a8SNamjae Jeon int __init create_node_manager_caches(void) 2022e05df3b1SJaegeuk Kim { 2023e05df3b1SJaegeuk Kim nat_entry_slab = f2fs_kmem_cache_create("nat_entry", 2024e8512d2eSGu Zheng sizeof(struct nat_entry)); 2025e05df3b1SJaegeuk Kim if (!nat_entry_slab) 2026aec71382SChao Yu goto fail; 2027e05df3b1SJaegeuk Kim 2028e05df3b1SJaegeuk Kim free_nid_slab = f2fs_kmem_cache_create("free_nid", 2029e8512d2eSGu Zheng sizeof(struct free_nid)); 2030aec71382SChao Yu if (!free_nid_slab) 2031ce3e6d25SMarkus Elfring goto destroy_nat_entry; 2032aec71382SChao Yu 2033aec71382SChao Yu nat_entry_set_slab = f2fs_kmem_cache_create("nat_entry_set", 2034aec71382SChao Yu sizeof(struct nat_entry_set)); 2035aec71382SChao Yu if (!nat_entry_set_slab) 2036ce3e6d25SMarkus Elfring goto destroy_free_nid; 2037e05df3b1SJaegeuk Kim return 0; 2038aec71382SChao Yu 2039ce3e6d25SMarkus Elfring destroy_free_nid: 2040aec71382SChao Yu kmem_cache_destroy(free_nid_slab); 2041ce3e6d25SMarkus Elfring destroy_nat_entry: 2042aec71382SChao Yu kmem_cache_destroy(nat_entry_slab); 2043aec71382SChao Yu fail: 2044aec71382SChao Yu return -ENOMEM; 2045e05df3b1SJaegeuk Kim } 2046e05df3b1SJaegeuk Kim 2047e05df3b1SJaegeuk Kim void destroy_node_manager_caches(void) 2048e05df3b1SJaegeuk Kim { 2049aec71382SChao Yu kmem_cache_destroy(nat_entry_set_slab); 2050e05df3b1SJaegeuk Kim kmem_cache_destroy(free_nid_slab); 2051e05df3b1SJaegeuk Kim kmem_cache_destroy(nat_entry_slab); 2052e05df3b1SJaegeuk Kim } 2053