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; 34cdfc41c1SJaegeuk Kim unsigned long mem_size = 0; 356fb03f3aSJaegeuk Kim bool res = false; 36cdfc41c1SJaegeuk Kim 37cdfc41c1SJaegeuk Kim si_meminfo(&val); 386fb03f3aSJaegeuk Kim /* give 25%, 25%, 50% memory for each components respectively */ 396fb03f3aSJaegeuk Kim if (type == FREE_NIDS) { 406fb03f3aSJaegeuk Kim mem_size = (nm_i->fcnt * sizeof(struct free_nid)) >> 12; 416fb03f3aSJaegeuk Kim res = mem_size < ((val.totalram * nm_i->ram_thresh / 100) >> 2); 426fb03f3aSJaegeuk Kim } else if (type == NAT_ENTRIES) { 436fb03f3aSJaegeuk Kim mem_size = (nm_i->nat_cnt * sizeof(struct nat_entry)) >> 12; 446fb03f3aSJaegeuk Kim res = mem_size < ((val.totalram * nm_i->ram_thresh / 100) >> 2); 456fb03f3aSJaegeuk Kim } else if (type == DIRTY_DENTS) { 462743f865SJaegeuk Kim if (sbi->sb->s_bdi->dirty_exceeded) 472743f865SJaegeuk Kim return false; 486fb03f3aSJaegeuk Kim mem_size = get_pages(sbi, F2FS_DIRTY_DENTS); 496fb03f3aSJaegeuk Kim res = mem_size < ((val.totalram * nm_i->ram_thresh / 100) >> 1); 506fb03f3aSJaegeuk Kim } 516fb03f3aSJaegeuk Kim return res; 52cdfc41c1SJaegeuk Kim } 53cdfc41c1SJaegeuk Kim 54e05df3b1SJaegeuk Kim static void clear_node_page_dirty(struct page *page) 55e05df3b1SJaegeuk Kim { 56e05df3b1SJaegeuk Kim struct address_space *mapping = page->mapping; 57e05df3b1SJaegeuk Kim unsigned int long flags; 58e05df3b1SJaegeuk Kim 59e05df3b1SJaegeuk Kim if (PageDirty(page)) { 60e05df3b1SJaegeuk Kim spin_lock_irqsave(&mapping->tree_lock, flags); 61e05df3b1SJaegeuk Kim radix_tree_tag_clear(&mapping->page_tree, 62e05df3b1SJaegeuk Kim page_index(page), 63e05df3b1SJaegeuk Kim PAGECACHE_TAG_DIRTY); 64e05df3b1SJaegeuk Kim spin_unlock_irqrestore(&mapping->tree_lock, flags); 65e05df3b1SJaegeuk Kim 66e05df3b1SJaegeuk Kim clear_page_dirty_for_io(page); 674081363fSJaegeuk Kim dec_page_count(F2FS_M_SB(mapping), F2FS_DIRTY_NODES); 68e05df3b1SJaegeuk Kim } 69e05df3b1SJaegeuk Kim ClearPageUptodate(page); 70e05df3b1SJaegeuk Kim } 71e05df3b1SJaegeuk Kim 72e05df3b1SJaegeuk Kim static struct page *get_current_nat_page(struct f2fs_sb_info *sbi, nid_t nid) 73e05df3b1SJaegeuk Kim { 74e05df3b1SJaegeuk Kim pgoff_t index = current_nat_addr(sbi, nid); 75e05df3b1SJaegeuk Kim return get_meta_page(sbi, index); 76e05df3b1SJaegeuk Kim } 77e05df3b1SJaegeuk Kim 78e05df3b1SJaegeuk Kim static struct page *get_next_nat_page(struct f2fs_sb_info *sbi, nid_t nid) 79e05df3b1SJaegeuk Kim { 80e05df3b1SJaegeuk Kim struct page *src_page; 81e05df3b1SJaegeuk Kim struct page *dst_page; 82e05df3b1SJaegeuk Kim pgoff_t src_off; 83e05df3b1SJaegeuk Kim pgoff_t dst_off; 84e05df3b1SJaegeuk Kim void *src_addr; 85e05df3b1SJaegeuk Kim void *dst_addr; 86e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 87e05df3b1SJaegeuk Kim 88e05df3b1SJaegeuk Kim src_off = current_nat_addr(sbi, nid); 89e05df3b1SJaegeuk Kim dst_off = next_nat_addr(sbi, src_off); 90e05df3b1SJaegeuk Kim 91e05df3b1SJaegeuk Kim /* get current nat block page with lock */ 92e05df3b1SJaegeuk Kim src_page = get_meta_page(sbi, src_off); 93e05df3b1SJaegeuk Kim dst_page = grab_meta_page(sbi, dst_off); 949850cf4aSJaegeuk Kim f2fs_bug_on(sbi, PageDirty(src_page)); 95e05df3b1SJaegeuk Kim 96e05df3b1SJaegeuk Kim src_addr = page_address(src_page); 97e05df3b1SJaegeuk Kim dst_addr = page_address(dst_page); 98e05df3b1SJaegeuk Kim memcpy(dst_addr, src_addr, PAGE_CACHE_SIZE); 99e05df3b1SJaegeuk Kim set_page_dirty(dst_page); 100e05df3b1SJaegeuk Kim f2fs_put_page(src_page, 1); 101e05df3b1SJaegeuk Kim 102e05df3b1SJaegeuk Kim set_to_next_nat(nm_i, nid); 103e05df3b1SJaegeuk Kim 104e05df3b1SJaegeuk Kim return dst_page; 105e05df3b1SJaegeuk Kim } 106e05df3b1SJaegeuk Kim 107e05df3b1SJaegeuk Kim static struct nat_entry *__lookup_nat_cache(struct f2fs_nm_info *nm_i, nid_t n) 108e05df3b1SJaegeuk Kim { 109e05df3b1SJaegeuk Kim return radix_tree_lookup(&nm_i->nat_root, n); 110e05df3b1SJaegeuk Kim } 111e05df3b1SJaegeuk Kim 112e05df3b1SJaegeuk Kim static unsigned int __gang_lookup_nat_cache(struct f2fs_nm_info *nm_i, 113e05df3b1SJaegeuk Kim nid_t start, unsigned int nr, struct nat_entry **ep) 114e05df3b1SJaegeuk Kim { 115e05df3b1SJaegeuk Kim return radix_tree_gang_lookup(&nm_i->nat_root, (void **)ep, start, nr); 116e05df3b1SJaegeuk Kim } 117e05df3b1SJaegeuk Kim 118e05df3b1SJaegeuk Kim static void __del_from_nat_cache(struct f2fs_nm_info *nm_i, struct nat_entry *e) 119e05df3b1SJaegeuk Kim { 120e05df3b1SJaegeuk Kim list_del(&e->list); 121e05df3b1SJaegeuk Kim radix_tree_delete(&nm_i->nat_root, nat_get_nid(e)); 122e05df3b1SJaegeuk Kim nm_i->nat_cnt--; 123e05df3b1SJaegeuk Kim kmem_cache_free(nat_entry_slab, e); 124e05df3b1SJaegeuk Kim } 125e05df3b1SJaegeuk Kim 12688bd02c9SJaegeuk Kim bool is_checkpointed_node(struct f2fs_sb_info *sbi, nid_t nid) 127e05df3b1SJaegeuk Kim { 128e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 129e05df3b1SJaegeuk Kim struct nat_entry *e; 13088bd02c9SJaegeuk Kim bool is_cp = true; 131e05df3b1SJaegeuk Kim 132e05df3b1SJaegeuk Kim read_lock(&nm_i->nat_tree_lock); 133e05df3b1SJaegeuk Kim e = __lookup_nat_cache(nm_i, nid); 1347ef35e3bSJaegeuk Kim if (e && !get_nat_flag(e, IS_CHECKPOINTED)) 13588bd02c9SJaegeuk Kim is_cp = false; 136e05df3b1SJaegeuk Kim read_unlock(&nm_i->nat_tree_lock); 137e05df3b1SJaegeuk Kim return is_cp; 138e05df3b1SJaegeuk Kim } 139e05df3b1SJaegeuk Kim 14088bd02c9SJaegeuk Kim bool has_fsynced_inode(struct f2fs_sb_info *sbi, nid_t ino) 141479f40c4SJaegeuk Kim { 142479f40c4SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 143479f40c4SJaegeuk Kim struct nat_entry *e; 14488bd02c9SJaegeuk Kim bool fsynced = false; 145479f40c4SJaegeuk Kim 146479f40c4SJaegeuk Kim read_lock(&nm_i->nat_tree_lock); 14788bd02c9SJaegeuk Kim e = __lookup_nat_cache(nm_i, ino); 14888bd02c9SJaegeuk Kim if (e && get_nat_flag(e, HAS_FSYNCED_INODE)) 14988bd02c9SJaegeuk Kim fsynced = true; 150479f40c4SJaegeuk Kim read_unlock(&nm_i->nat_tree_lock); 15188bd02c9SJaegeuk Kim return fsynced; 152479f40c4SJaegeuk Kim } 153479f40c4SJaegeuk Kim 15488bd02c9SJaegeuk Kim bool need_inode_block_update(struct f2fs_sb_info *sbi, nid_t ino) 155b6fe5873SJaegeuk Kim { 156b6fe5873SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 157b6fe5873SJaegeuk Kim struct nat_entry *e; 15888bd02c9SJaegeuk Kim bool need_update = true; 159b6fe5873SJaegeuk Kim 16088bd02c9SJaegeuk Kim read_lock(&nm_i->nat_tree_lock); 16188bd02c9SJaegeuk Kim e = __lookup_nat_cache(nm_i, ino); 16288bd02c9SJaegeuk Kim if (e && get_nat_flag(e, HAS_LAST_FSYNC) && 16388bd02c9SJaegeuk Kim (get_nat_flag(e, IS_CHECKPOINTED) || 16488bd02c9SJaegeuk Kim get_nat_flag(e, HAS_FSYNCED_INODE))) 16588bd02c9SJaegeuk Kim need_update = false; 16688bd02c9SJaegeuk Kim read_unlock(&nm_i->nat_tree_lock); 16788bd02c9SJaegeuk Kim return need_update; 168b6fe5873SJaegeuk Kim } 169b6fe5873SJaegeuk Kim 170e05df3b1SJaegeuk Kim static struct nat_entry *grab_nat_entry(struct f2fs_nm_info *nm_i, nid_t nid) 171e05df3b1SJaegeuk Kim { 172e05df3b1SJaegeuk Kim struct nat_entry *new; 173e05df3b1SJaegeuk Kim 174e05df3b1SJaegeuk Kim new = kmem_cache_alloc(nat_entry_slab, GFP_ATOMIC); 175e05df3b1SJaegeuk Kim if (!new) 176e05df3b1SJaegeuk Kim return NULL; 177e05df3b1SJaegeuk Kim if (radix_tree_insert(&nm_i->nat_root, nid, new)) { 178e05df3b1SJaegeuk Kim kmem_cache_free(nat_entry_slab, new); 179e05df3b1SJaegeuk Kim return NULL; 180e05df3b1SJaegeuk Kim } 181e05df3b1SJaegeuk Kim memset(new, 0, sizeof(struct nat_entry)); 182e05df3b1SJaegeuk Kim nat_set_nid(new, nid); 18388bd02c9SJaegeuk Kim nat_reset_flag(new); 184e05df3b1SJaegeuk Kim list_add_tail(&new->list, &nm_i->nat_entries); 185e05df3b1SJaegeuk Kim nm_i->nat_cnt++; 186e05df3b1SJaegeuk Kim return new; 187e05df3b1SJaegeuk Kim } 188e05df3b1SJaegeuk Kim 189e05df3b1SJaegeuk Kim static void cache_nat_entry(struct f2fs_nm_info *nm_i, nid_t nid, 190e05df3b1SJaegeuk Kim struct f2fs_nat_entry *ne) 191e05df3b1SJaegeuk Kim { 192e05df3b1SJaegeuk Kim struct nat_entry *e; 193e05df3b1SJaegeuk Kim retry: 194e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 195e05df3b1SJaegeuk Kim e = __lookup_nat_cache(nm_i, nid); 196e05df3b1SJaegeuk Kim if (!e) { 197e05df3b1SJaegeuk Kim e = grab_nat_entry(nm_i, nid); 198e05df3b1SJaegeuk Kim if (!e) { 199e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 200e05df3b1SJaegeuk Kim goto retry; 201e05df3b1SJaegeuk Kim } 20294dac22eSChao Yu node_info_from_raw_nat(&e->ni, ne); 203e05df3b1SJaegeuk Kim } 204e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 205e05df3b1SJaegeuk Kim } 206e05df3b1SJaegeuk Kim 207e05df3b1SJaegeuk Kim static void set_node_addr(struct f2fs_sb_info *sbi, struct node_info *ni, 208479f40c4SJaegeuk Kim block_t new_blkaddr, bool fsync_done) 209e05df3b1SJaegeuk Kim { 210e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 211e05df3b1SJaegeuk Kim struct nat_entry *e; 212e05df3b1SJaegeuk Kim retry: 213e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 214e05df3b1SJaegeuk Kim e = __lookup_nat_cache(nm_i, ni->nid); 215e05df3b1SJaegeuk Kim if (!e) { 216e05df3b1SJaegeuk Kim e = grab_nat_entry(nm_i, ni->nid); 217e05df3b1SJaegeuk Kim if (!e) { 218e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 219e05df3b1SJaegeuk Kim goto retry; 220e05df3b1SJaegeuk Kim } 221e05df3b1SJaegeuk Kim e->ni = *ni; 2229850cf4aSJaegeuk Kim f2fs_bug_on(sbi, ni->blk_addr == NEW_ADDR); 223e05df3b1SJaegeuk Kim } else if (new_blkaddr == NEW_ADDR) { 224e05df3b1SJaegeuk Kim /* 225e05df3b1SJaegeuk Kim * when nid is reallocated, 226e05df3b1SJaegeuk Kim * previous nat entry can be remained in nat cache. 227e05df3b1SJaegeuk Kim * So, reinitialize it with new information. 228e05df3b1SJaegeuk Kim */ 229e05df3b1SJaegeuk Kim e->ni = *ni; 2309850cf4aSJaegeuk Kim f2fs_bug_on(sbi, ni->blk_addr != NULL_ADDR); 231e05df3b1SJaegeuk Kim } 232e05df3b1SJaegeuk Kim 233e05df3b1SJaegeuk Kim /* sanity check */ 2349850cf4aSJaegeuk Kim f2fs_bug_on(sbi, nat_get_blkaddr(e) != ni->blk_addr); 2359850cf4aSJaegeuk Kim f2fs_bug_on(sbi, nat_get_blkaddr(e) == NULL_ADDR && 236e05df3b1SJaegeuk Kim new_blkaddr == NULL_ADDR); 2379850cf4aSJaegeuk Kim f2fs_bug_on(sbi, nat_get_blkaddr(e) == NEW_ADDR && 238e05df3b1SJaegeuk Kim new_blkaddr == NEW_ADDR); 2399850cf4aSJaegeuk Kim f2fs_bug_on(sbi, nat_get_blkaddr(e) != NEW_ADDR && 240e05df3b1SJaegeuk Kim nat_get_blkaddr(e) != NULL_ADDR && 241e05df3b1SJaegeuk Kim new_blkaddr == NEW_ADDR); 242e05df3b1SJaegeuk Kim 243e1c42045Sarter97 /* increment version no as node is removed */ 244e05df3b1SJaegeuk Kim if (nat_get_blkaddr(e) != NEW_ADDR && new_blkaddr == NULL_ADDR) { 245e05df3b1SJaegeuk Kim unsigned char version = nat_get_version(e); 246e05df3b1SJaegeuk Kim nat_set_version(e, inc_node_version(version)); 247e05df3b1SJaegeuk Kim } 248e05df3b1SJaegeuk Kim 249e05df3b1SJaegeuk Kim /* change address */ 250e05df3b1SJaegeuk Kim nat_set_blkaddr(e, new_blkaddr); 25188bd02c9SJaegeuk Kim if (new_blkaddr == NEW_ADDR || new_blkaddr == NULL_ADDR) 25288bd02c9SJaegeuk Kim set_nat_flag(e, IS_CHECKPOINTED, false); 253e05df3b1SJaegeuk Kim __set_nat_cache_dirty(nm_i, e); 254479f40c4SJaegeuk Kim 255479f40c4SJaegeuk Kim /* update fsync_mark if its inode nat entry is still alive */ 256479f40c4SJaegeuk Kim e = __lookup_nat_cache(nm_i, ni->ino); 25788bd02c9SJaegeuk Kim if (e) { 25888bd02c9SJaegeuk Kim if (fsync_done && ni->nid == ni->ino) 25988bd02c9SJaegeuk Kim set_nat_flag(e, HAS_FSYNCED_INODE, true); 26088bd02c9SJaegeuk Kim set_nat_flag(e, HAS_LAST_FSYNC, fsync_done); 26188bd02c9SJaegeuk Kim } 262e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 263e05df3b1SJaegeuk Kim } 264e05df3b1SJaegeuk Kim 2654660f9c0SJaegeuk Kim int try_to_free_nats(struct f2fs_sb_info *sbi, int nr_shrink) 266e05df3b1SJaegeuk Kim { 267e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 268e05df3b1SJaegeuk Kim 2696fb03f3aSJaegeuk Kim if (available_free_memory(sbi, NAT_ENTRIES)) 270e05df3b1SJaegeuk Kim return 0; 271e05df3b1SJaegeuk Kim 272e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 273e05df3b1SJaegeuk Kim while (nr_shrink && !list_empty(&nm_i->nat_entries)) { 274e05df3b1SJaegeuk Kim struct nat_entry *ne; 275e05df3b1SJaegeuk Kim ne = list_first_entry(&nm_i->nat_entries, 276e05df3b1SJaegeuk Kim struct nat_entry, list); 277e05df3b1SJaegeuk Kim __del_from_nat_cache(nm_i, ne); 278e05df3b1SJaegeuk Kim nr_shrink--; 279e05df3b1SJaegeuk Kim } 280e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 281e05df3b1SJaegeuk Kim return nr_shrink; 282e05df3b1SJaegeuk Kim } 283e05df3b1SJaegeuk Kim 2840a8165d7SJaegeuk Kim /* 285e1c42045Sarter97 * This function always returns success 286e05df3b1SJaegeuk Kim */ 287e05df3b1SJaegeuk Kim void get_node_info(struct f2fs_sb_info *sbi, nid_t nid, struct node_info *ni) 288e05df3b1SJaegeuk Kim { 289e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 290e05df3b1SJaegeuk Kim struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); 291e05df3b1SJaegeuk Kim struct f2fs_summary_block *sum = curseg->sum_blk; 292e05df3b1SJaegeuk Kim nid_t start_nid = START_NID(nid); 293e05df3b1SJaegeuk Kim struct f2fs_nat_block *nat_blk; 294e05df3b1SJaegeuk Kim struct page *page = NULL; 295e05df3b1SJaegeuk Kim struct f2fs_nat_entry ne; 296e05df3b1SJaegeuk Kim struct nat_entry *e; 297e05df3b1SJaegeuk Kim int i; 298e05df3b1SJaegeuk Kim 299be4124f8SNamjae Jeon memset(&ne, 0, sizeof(struct f2fs_nat_entry)); 300e05df3b1SJaegeuk Kim ni->nid = nid; 301e05df3b1SJaegeuk Kim 302e05df3b1SJaegeuk Kim /* Check nat cache */ 303e05df3b1SJaegeuk Kim read_lock(&nm_i->nat_tree_lock); 304e05df3b1SJaegeuk Kim e = __lookup_nat_cache(nm_i, nid); 305e05df3b1SJaegeuk Kim if (e) { 306e05df3b1SJaegeuk Kim ni->ino = nat_get_ino(e); 307e05df3b1SJaegeuk Kim ni->blk_addr = nat_get_blkaddr(e); 308e05df3b1SJaegeuk Kim ni->version = nat_get_version(e); 309e05df3b1SJaegeuk Kim } 310e05df3b1SJaegeuk Kim read_unlock(&nm_i->nat_tree_lock); 311e05df3b1SJaegeuk Kim if (e) 312e05df3b1SJaegeuk Kim return; 313e05df3b1SJaegeuk Kim 314e05df3b1SJaegeuk Kim /* Check current segment summary */ 315e05df3b1SJaegeuk Kim mutex_lock(&curseg->curseg_mutex); 316e05df3b1SJaegeuk Kim i = lookup_journal_in_cursum(sum, NAT_JOURNAL, nid, 0); 317e05df3b1SJaegeuk Kim if (i >= 0) { 318e05df3b1SJaegeuk Kim ne = nat_in_journal(sum, i); 319e05df3b1SJaegeuk Kim node_info_from_raw_nat(ni, &ne); 320e05df3b1SJaegeuk Kim } 321e05df3b1SJaegeuk Kim mutex_unlock(&curseg->curseg_mutex); 322e05df3b1SJaegeuk Kim if (i >= 0) 323e05df3b1SJaegeuk Kim goto cache; 324e05df3b1SJaegeuk Kim 325e05df3b1SJaegeuk Kim /* Fill node_info from nat page */ 326e05df3b1SJaegeuk Kim page = get_current_nat_page(sbi, start_nid); 327e05df3b1SJaegeuk Kim nat_blk = (struct f2fs_nat_block *)page_address(page); 328e05df3b1SJaegeuk Kim ne = nat_blk->entries[nid - start_nid]; 329e05df3b1SJaegeuk Kim node_info_from_raw_nat(ni, &ne); 330e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 331e05df3b1SJaegeuk Kim cache: 332e05df3b1SJaegeuk Kim /* cache nat entry */ 333e05df3b1SJaegeuk Kim cache_nat_entry(NM_I(sbi), nid, &ne); 334e05df3b1SJaegeuk Kim } 335e05df3b1SJaegeuk Kim 3360a8165d7SJaegeuk Kim /* 337e05df3b1SJaegeuk Kim * The maximum depth is four. 338e05df3b1SJaegeuk Kim * Offset[0] will have raw inode offset. 339e05df3b1SJaegeuk Kim */ 340de93653fSJaegeuk Kim static int get_node_path(struct f2fs_inode_info *fi, long block, 341de93653fSJaegeuk Kim int offset[4], unsigned int noffset[4]) 342e05df3b1SJaegeuk Kim { 343de93653fSJaegeuk Kim const long direct_index = ADDRS_PER_INODE(fi); 344e05df3b1SJaegeuk Kim const long direct_blks = ADDRS_PER_BLOCK; 345e05df3b1SJaegeuk Kim const long dptrs_per_blk = NIDS_PER_BLOCK; 346e05df3b1SJaegeuk Kim const long indirect_blks = ADDRS_PER_BLOCK * NIDS_PER_BLOCK; 347e05df3b1SJaegeuk Kim const long dindirect_blks = indirect_blks * NIDS_PER_BLOCK; 348e05df3b1SJaegeuk Kim int n = 0; 349e05df3b1SJaegeuk Kim int level = 0; 350e05df3b1SJaegeuk Kim 351e05df3b1SJaegeuk Kim noffset[0] = 0; 352e05df3b1SJaegeuk Kim 353e05df3b1SJaegeuk Kim if (block < direct_index) { 35425c0a6e5SNamjae Jeon offset[n] = block; 355e05df3b1SJaegeuk Kim goto got; 356e05df3b1SJaegeuk Kim } 357e05df3b1SJaegeuk Kim block -= direct_index; 358e05df3b1SJaegeuk Kim if (block < direct_blks) { 359e05df3b1SJaegeuk Kim offset[n++] = NODE_DIR1_BLOCK; 360e05df3b1SJaegeuk Kim noffset[n] = 1; 36125c0a6e5SNamjae Jeon offset[n] = block; 362e05df3b1SJaegeuk Kim level = 1; 363e05df3b1SJaegeuk Kim goto got; 364e05df3b1SJaegeuk Kim } 365e05df3b1SJaegeuk Kim block -= direct_blks; 366e05df3b1SJaegeuk Kim if (block < direct_blks) { 367e05df3b1SJaegeuk Kim offset[n++] = NODE_DIR2_BLOCK; 368e05df3b1SJaegeuk Kim noffset[n] = 2; 36925c0a6e5SNamjae Jeon offset[n] = block; 370e05df3b1SJaegeuk Kim level = 1; 371e05df3b1SJaegeuk Kim goto got; 372e05df3b1SJaegeuk Kim } 373e05df3b1SJaegeuk Kim block -= direct_blks; 374e05df3b1SJaegeuk Kim if (block < indirect_blks) { 375e05df3b1SJaegeuk Kim offset[n++] = NODE_IND1_BLOCK; 376e05df3b1SJaegeuk Kim noffset[n] = 3; 377e05df3b1SJaegeuk Kim offset[n++] = block / direct_blks; 378e05df3b1SJaegeuk Kim noffset[n] = 4 + offset[n - 1]; 37925c0a6e5SNamjae Jeon offset[n] = block % direct_blks; 380e05df3b1SJaegeuk Kim level = 2; 381e05df3b1SJaegeuk Kim goto got; 382e05df3b1SJaegeuk Kim } 383e05df3b1SJaegeuk Kim block -= indirect_blks; 384e05df3b1SJaegeuk Kim if (block < indirect_blks) { 385e05df3b1SJaegeuk Kim offset[n++] = NODE_IND2_BLOCK; 386e05df3b1SJaegeuk Kim noffset[n] = 4 + dptrs_per_blk; 387e05df3b1SJaegeuk Kim offset[n++] = block / direct_blks; 388e05df3b1SJaegeuk Kim noffset[n] = 5 + dptrs_per_blk + offset[n - 1]; 38925c0a6e5SNamjae Jeon offset[n] = block % direct_blks; 390e05df3b1SJaegeuk Kim level = 2; 391e05df3b1SJaegeuk Kim goto got; 392e05df3b1SJaegeuk Kim } 393e05df3b1SJaegeuk Kim block -= indirect_blks; 394e05df3b1SJaegeuk Kim if (block < dindirect_blks) { 395e05df3b1SJaegeuk Kim offset[n++] = NODE_DIND_BLOCK; 396e05df3b1SJaegeuk Kim noffset[n] = 5 + (dptrs_per_blk * 2); 397e05df3b1SJaegeuk Kim offset[n++] = block / indirect_blks; 398e05df3b1SJaegeuk Kim noffset[n] = 6 + (dptrs_per_blk * 2) + 399e05df3b1SJaegeuk Kim offset[n - 1] * (dptrs_per_blk + 1); 400e05df3b1SJaegeuk Kim offset[n++] = (block / direct_blks) % dptrs_per_blk; 401e05df3b1SJaegeuk Kim noffset[n] = 7 + (dptrs_per_blk * 2) + 402e05df3b1SJaegeuk Kim offset[n - 2] * (dptrs_per_blk + 1) + 403e05df3b1SJaegeuk Kim offset[n - 1]; 40425c0a6e5SNamjae Jeon offset[n] = block % direct_blks; 405e05df3b1SJaegeuk Kim level = 3; 406e05df3b1SJaegeuk Kim goto got; 407e05df3b1SJaegeuk Kim } else { 408e05df3b1SJaegeuk Kim BUG(); 409e05df3b1SJaegeuk Kim } 410e05df3b1SJaegeuk Kim got: 411e05df3b1SJaegeuk Kim return level; 412e05df3b1SJaegeuk Kim } 413e05df3b1SJaegeuk Kim 414e05df3b1SJaegeuk Kim /* 415e05df3b1SJaegeuk Kim * Caller should call f2fs_put_dnode(dn). 4164f4124d0SChao Yu * Also, it should grab and release a rwsem by calling f2fs_lock_op() and 4174f4124d0SChao Yu * f2fs_unlock_op() only if ro is not set RDONLY_NODE. 41839936837SJaegeuk Kim * In the case of RDONLY_NODE, we don't need to care about mutex. 419e05df3b1SJaegeuk Kim */ 420266e97a8SJaegeuk Kim int get_dnode_of_data(struct dnode_of_data *dn, pgoff_t index, int mode) 421e05df3b1SJaegeuk Kim { 4224081363fSJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); 423e05df3b1SJaegeuk Kim struct page *npage[4]; 424e05df3b1SJaegeuk Kim struct page *parent; 425e05df3b1SJaegeuk Kim int offset[4]; 426e05df3b1SJaegeuk Kim unsigned int noffset[4]; 427e05df3b1SJaegeuk Kim nid_t nids[4]; 428e05df3b1SJaegeuk Kim int level, i; 429e05df3b1SJaegeuk Kim int err = 0; 430e05df3b1SJaegeuk Kim 431de93653fSJaegeuk Kim level = get_node_path(F2FS_I(dn->inode), index, offset, noffset); 432e05df3b1SJaegeuk Kim 433e05df3b1SJaegeuk Kim nids[0] = dn->inode->i_ino; 4341646cfacSJaegeuk Kim npage[0] = dn->inode_page; 4351646cfacSJaegeuk Kim 4361646cfacSJaegeuk Kim if (!npage[0]) { 437e05df3b1SJaegeuk Kim npage[0] = get_node_page(sbi, nids[0]); 438e05df3b1SJaegeuk Kim if (IS_ERR(npage[0])) 439e05df3b1SJaegeuk Kim return PTR_ERR(npage[0]); 4401646cfacSJaegeuk Kim } 441e05df3b1SJaegeuk Kim parent = npage[0]; 44252c2db3fSChangman Lee if (level != 0) 443e05df3b1SJaegeuk Kim nids[1] = get_nid(parent, offset[0], true); 444e05df3b1SJaegeuk Kim dn->inode_page = npage[0]; 445e05df3b1SJaegeuk Kim dn->inode_page_locked = true; 446e05df3b1SJaegeuk Kim 447e05df3b1SJaegeuk Kim /* get indirect or direct nodes */ 448e05df3b1SJaegeuk Kim for (i = 1; i <= level; i++) { 449e05df3b1SJaegeuk Kim bool done = false; 450e05df3b1SJaegeuk Kim 451266e97a8SJaegeuk Kim if (!nids[i] && mode == ALLOC_NODE) { 452e05df3b1SJaegeuk Kim /* alloc new node */ 453e05df3b1SJaegeuk Kim if (!alloc_nid(sbi, &(nids[i]))) { 454e05df3b1SJaegeuk Kim err = -ENOSPC; 455e05df3b1SJaegeuk Kim goto release_pages; 456e05df3b1SJaegeuk Kim } 457e05df3b1SJaegeuk Kim 458e05df3b1SJaegeuk Kim dn->nid = nids[i]; 4598ae8f162SJaegeuk Kim npage[i] = new_node_page(dn, noffset[i], NULL); 460e05df3b1SJaegeuk Kim if (IS_ERR(npage[i])) { 461e05df3b1SJaegeuk Kim alloc_nid_failed(sbi, nids[i]); 462e05df3b1SJaegeuk Kim err = PTR_ERR(npage[i]); 463e05df3b1SJaegeuk Kim goto release_pages; 464e05df3b1SJaegeuk Kim } 465e05df3b1SJaegeuk Kim 466e05df3b1SJaegeuk Kim set_nid(parent, offset[i - 1], nids[i], i == 1); 467e05df3b1SJaegeuk Kim alloc_nid_done(sbi, nids[i]); 468e05df3b1SJaegeuk Kim done = true; 469266e97a8SJaegeuk Kim } else if (mode == LOOKUP_NODE_RA && i == level && level > 1) { 470e05df3b1SJaegeuk Kim npage[i] = get_node_page_ra(parent, offset[i - 1]); 471e05df3b1SJaegeuk Kim if (IS_ERR(npage[i])) { 472e05df3b1SJaegeuk Kim err = PTR_ERR(npage[i]); 473e05df3b1SJaegeuk Kim goto release_pages; 474e05df3b1SJaegeuk Kim } 475e05df3b1SJaegeuk Kim done = true; 476e05df3b1SJaegeuk Kim } 477e05df3b1SJaegeuk Kim if (i == 1) { 478e05df3b1SJaegeuk Kim dn->inode_page_locked = false; 479e05df3b1SJaegeuk Kim unlock_page(parent); 480e05df3b1SJaegeuk Kim } else { 481e05df3b1SJaegeuk Kim f2fs_put_page(parent, 1); 482e05df3b1SJaegeuk Kim } 483e05df3b1SJaegeuk Kim 484e05df3b1SJaegeuk Kim if (!done) { 485e05df3b1SJaegeuk Kim npage[i] = get_node_page(sbi, nids[i]); 486e05df3b1SJaegeuk Kim if (IS_ERR(npage[i])) { 487e05df3b1SJaegeuk Kim err = PTR_ERR(npage[i]); 488e05df3b1SJaegeuk Kim f2fs_put_page(npage[0], 0); 489e05df3b1SJaegeuk Kim goto release_out; 490e05df3b1SJaegeuk Kim } 491e05df3b1SJaegeuk Kim } 492e05df3b1SJaegeuk Kim if (i < level) { 493e05df3b1SJaegeuk Kim parent = npage[i]; 494e05df3b1SJaegeuk Kim nids[i + 1] = get_nid(parent, offset[i], false); 495e05df3b1SJaegeuk Kim } 496e05df3b1SJaegeuk Kim } 497e05df3b1SJaegeuk Kim dn->nid = nids[level]; 498e05df3b1SJaegeuk Kim dn->ofs_in_node = offset[level]; 499e05df3b1SJaegeuk Kim dn->node_page = npage[level]; 500e05df3b1SJaegeuk Kim dn->data_blkaddr = datablock_addr(dn->node_page, dn->ofs_in_node); 501e05df3b1SJaegeuk Kim return 0; 502e05df3b1SJaegeuk Kim 503e05df3b1SJaegeuk Kim release_pages: 504e05df3b1SJaegeuk Kim f2fs_put_page(parent, 1); 505e05df3b1SJaegeuk Kim if (i > 1) 506e05df3b1SJaegeuk Kim f2fs_put_page(npage[0], 0); 507e05df3b1SJaegeuk Kim release_out: 508e05df3b1SJaegeuk Kim dn->inode_page = NULL; 509e05df3b1SJaegeuk Kim dn->node_page = NULL; 510e05df3b1SJaegeuk Kim return err; 511e05df3b1SJaegeuk Kim } 512e05df3b1SJaegeuk Kim 513e05df3b1SJaegeuk Kim static void truncate_node(struct dnode_of_data *dn) 514e05df3b1SJaegeuk Kim { 5154081363fSJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); 516e05df3b1SJaegeuk Kim struct node_info ni; 517e05df3b1SJaegeuk Kim 518e05df3b1SJaegeuk Kim get_node_info(sbi, dn->nid, &ni); 51971e9fec5SJaegeuk Kim if (dn->inode->i_blocks == 0) { 5209850cf4aSJaegeuk Kim f2fs_bug_on(sbi, ni.blk_addr != NULL_ADDR); 52171e9fec5SJaegeuk Kim goto invalidate; 52271e9fec5SJaegeuk Kim } 5239850cf4aSJaegeuk Kim f2fs_bug_on(sbi, ni.blk_addr == NULL_ADDR); 524e05df3b1SJaegeuk Kim 525e05df3b1SJaegeuk Kim /* Deallocate node address */ 52671e9fec5SJaegeuk Kim invalidate_blocks(sbi, ni.blk_addr); 527ef86d709SGu Zheng dec_valid_node_count(sbi, dn->inode); 528479f40c4SJaegeuk Kim set_node_addr(sbi, &ni, NULL_ADDR, false); 529e05df3b1SJaegeuk Kim 530e05df3b1SJaegeuk Kim if (dn->nid == dn->inode->i_ino) { 531e05df3b1SJaegeuk Kim remove_orphan_inode(sbi, dn->nid); 532e05df3b1SJaegeuk Kim dec_valid_inode_count(sbi); 533e05df3b1SJaegeuk Kim } else { 534e05df3b1SJaegeuk Kim sync_inode_page(dn); 535e05df3b1SJaegeuk Kim } 53671e9fec5SJaegeuk Kim invalidate: 537e05df3b1SJaegeuk Kim clear_node_page_dirty(dn->node_page); 538e05df3b1SJaegeuk Kim F2FS_SET_SB_DIRT(sbi); 539e05df3b1SJaegeuk Kim 540e05df3b1SJaegeuk Kim f2fs_put_page(dn->node_page, 1); 541bf39c00aSJaegeuk Kim 542bf39c00aSJaegeuk Kim invalidate_mapping_pages(NODE_MAPPING(sbi), 543bf39c00aSJaegeuk Kim dn->node_page->index, dn->node_page->index); 544bf39c00aSJaegeuk Kim 545e05df3b1SJaegeuk Kim dn->node_page = NULL; 54651dd6249SNamjae Jeon trace_f2fs_truncate_node(dn->inode, dn->nid, ni.blk_addr); 547e05df3b1SJaegeuk Kim } 548e05df3b1SJaegeuk Kim 549e05df3b1SJaegeuk Kim static int truncate_dnode(struct dnode_of_data *dn) 550e05df3b1SJaegeuk Kim { 551e05df3b1SJaegeuk Kim struct page *page; 552e05df3b1SJaegeuk Kim 553e05df3b1SJaegeuk Kim if (dn->nid == 0) 554e05df3b1SJaegeuk Kim return 1; 555e05df3b1SJaegeuk Kim 556e05df3b1SJaegeuk Kim /* get direct node */ 5574081363fSJaegeuk Kim page = get_node_page(F2FS_I_SB(dn->inode), dn->nid); 558e05df3b1SJaegeuk Kim if (IS_ERR(page) && PTR_ERR(page) == -ENOENT) 559e05df3b1SJaegeuk Kim return 1; 560e05df3b1SJaegeuk Kim else if (IS_ERR(page)) 561e05df3b1SJaegeuk Kim return PTR_ERR(page); 562e05df3b1SJaegeuk Kim 563e05df3b1SJaegeuk Kim /* Make dnode_of_data for parameter */ 564e05df3b1SJaegeuk Kim dn->node_page = page; 565e05df3b1SJaegeuk Kim dn->ofs_in_node = 0; 566e05df3b1SJaegeuk Kim truncate_data_blocks(dn); 567e05df3b1SJaegeuk Kim truncate_node(dn); 568e05df3b1SJaegeuk Kim return 1; 569e05df3b1SJaegeuk Kim } 570e05df3b1SJaegeuk Kim 571e05df3b1SJaegeuk Kim static int truncate_nodes(struct dnode_of_data *dn, unsigned int nofs, 572e05df3b1SJaegeuk Kim int ofs, int depth) 573e05df3b1SJaegeuk Kim { 574e05df3b1SJaegeuk Kim struct dnode_of_data rdn = *dn; 575e05df3b1SJaegeuk Kim struct page *page; 576e05df3b1SJaegeuk Kim struct f2fs_node *rn; 577e05df3b1SJaegeuk Kim nid_t child_nid; 578e05df3b1SJaegeuk Kim unsigned int child_nofs; 579e05df3b1SJaegeuk Kim int freed = 0; 580e05df3b1SJaegeuk Kim int i, ret; 581e05df3b1SJaegeuk Kim 582e05df3b1SJaegeuk Kim if (dn->nid == 0) 583e05df3b1SJaegeuk Kim return NIDS_PER_BLOCK + 1; 584e05df3b1SJaegeuk Kim 58551dd6249SNamjae Jeon trace_f2fs_truncate_nodes_enter(dn->inode, dn->nid, dn->data_blkaddr); 58651dd6249SNamjae Jeon 5874081363fSJaegeuk Kim page = get_node_page(F2FS_I_SB(dn->inode), dn->nid); 58851dd6249SNamjae Jeon if (IS_ERR(page)) { 58951dd6249SNamjae Jeon trace_f2fs_truncate_nodes_exit(dn->inode, PTR_ERR(page)); 590e05df3b1SJaegeuk Kim return PTR_ERR(page); 59151dd6249SNamjae Jeon } 592e05df3b1SJaegeuk Kim 59345590710SGu Zheng rn = F2FS_NODE(page); 594e05df3b1SJaegeuk Kim if (depth < 3) { 595e05df3b1SJaegeuk Kim for (i = ofs; i < NIDS_PER_BLOCK; i++, freed++) { 596e05df3b1SJaegeuk Kim child_nid = le32_to_cpu(rn->in.nid[i]); 597e05df3b1SJaegeuk Kim if (child_nid == 0) 598e05df3b1SJaegeuk Kim continue; 599e05df3b1SJaegeuk Kim rdn.nid = child_nid; 600e05df3b1SJaegeuk Kim ret = truncate_dnode(&rdn); 601e05df3b1SJaegeuk Kim if (ret < 0) 602e05df3b1SJaegeuk Kim goto out_err; 603e05df3b1SJaegeuk Kim set_nid(page, i, 0, false); 604e05df3b1SJaegeuk Kim } 605e05df3b1SJaegeuk Kim } else { 606e05df3b1SJaegeuk Kim child_nofs = nofs + ofs * (NIDS_PER_BLOCK + 1) + 1; 607e05df3b1SJaegeuk Kim for (i = ofs; i < NIDS_PER_BLOCK; i++) { 608e05df3b1SJaegeuk Kim child_nid = le32_to_cpu(rn->in.nid[i]); 609e05df3b1SJaegeuk Kim if (child_nid == 0) { 610e05df3b1SJaegeuk Kim child_nofs += NIDS_PER_BLOCK + 1; 611e05df3b1SJaegeuk Kim continue; 612e05df3b1SJaegeuk Kim } 613e05df3b1SJaegeuk Kim rdn.nid = child_nid; 614e05df3b1SJaegeuk Kim ret = truncate_nodes(&rdn, child_nofs, 0, depth - 1); 615e05df3b1SJaegeuk Kim if (ret == (NIDS_PER_BLOCK + 1)) { 616e05df3b1SJaegeuk Kim set_nid(page, i, 0, false); 617e05df3b1SJaegeuk Kim child_nofs += ret; 618e05df3b1SJaegeuk Kim } else if (ret < 0 && ret != -ENOENT) { 619e05df3b1SJaegeuk Kim goto out_err; 620e05df3b1SJaegeuk Kim } 621e05df3b1SJaegeuk Kim } 622e05df3b1SJaegeuk Kim freed = child_nofs; 623e05df3b1SJaegeuk Kim } 624e05df3b1SJaegeuk Kim 625e05df3b1SJaegeuk Kim if (!ofs) { 626e05df3b1SJaegeuk Kim /* remove current indirect node */ 627e05df3b1SJaegeuk Kim dn->node_page = page; 628e05df3b1SJaegeuk Kim truncate_node(dn); 629e05df3b1SJaegeuk Kim freed++; 630e05df3b1SJaegeuk Kim } else { 631e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 632e05df3b1SJaegeuk Kim } 63351dd6249SNamjae Jeon trace_f2fs_truncate_nodes_exit(dn->inode, freed); 634e05df3b1SJaegeuk Kim return freed; 635e05df3b1SJaegeuk Kim 636e05df3b1SJaegeuk Kim out_err: 637e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 63851dd6249SNamjae Jeon trace_f2fs_truncate_nodes_exit(dn->inode, ret); 639e05df3b1SJaegeuk Kim return ret; 640e05df3b1SJaegeuk Kim } 641e05df3b1SJaegeuk Kim 642e05df3b1SJaegeuk Kim static int truncate_partial_nodes(struct dnode_of_data *dn, 643e05df3b1SJaegeuk Kim struct f2fs_inode *ri, int *offset, int depth) 644e05df3b1SJaegeuk Kim { 645e05df3b1SJaegeuk Kim struct page *pages[2]; 646e05df3b1SJaegeuk Kim nid_t nid[3]; 647e05df3b1SJaegeuk Kim nid_t child_nid; 648e05df3b1SJaegeuk Kim int err = 0; 649e05df3b1SJaegeuk Kim int i; 650e05df3b1SJaegeuk Kim int idx = depth - 2; 651e05df3b1SJaegeuk Kim 652e05df3b1SJaegeuk Kim nid[0] = le32_to_cpu(ri->i_nid[offset[0] - NODE_DIR1_BLOCK]); 653e05df3b1SJaegeuk Kim if (!nid[0]) 654e05df3b1SJaegeuk Kim return 0; 655e05df3b1SJaegeuk Kim 656e05df3b1SJaegeuk Kim /* get indirect nodes in the path */ 657a225dca3Sshifei10.ge for (i = 0; i < idx + 1; i++) { 658e1c42045Sarter97 /* reference count'll be increased */ 6594081363fSJaegeuk Kim pages[i] = get_node_page(F2FS_I_SB(dn->inode), nid[i]); 660e05df3b1SJaegeuk Kim if (IS_ERR(pages[i])) { 661e05df3b1SJaegeuk Kim err = PTR_ERR(pages[i]); 662a225dca3Sshifei10.ge idx = i - 1; 663e05df3b1SJaegeuk Kim goto fail; 664e05df3b1SJaegeuk Kim } 665e05df3b1SJaegeuk Kim nid[i + 1] = get_nid(pages[i], offset[i + 1], false); 666e05df3b1SJaegeuk Kim } 667e05df3b1SJaegeuk Kim 668e05df3b1SJaegeuk Kim /* free direct nodes linked to a partial indirect node */ 669a225dca3Sshifei10.ge for (i = offset[idx + 1]; i < NIDS_PER_BLOCK; i++) { 670e05df3b1SJaegeuk Kim child_nid = get_nid(pages[idx], i, false); 671e05df3b1SJaegeuk Kim if (!child_nid) 672e05df3b1SJaegeuk Kim continue; 673e05df3b1SJaegeuk Kim dn->nid = child_nid; 674e05df3b1SJaegeuk Kim err = truncate_dnode(dn); 675e05df3b1SJaegeuk Kim if (err < 0) 676e05df3b1SJaegeuk Kim goto fail; 677e05df3b1SJaegeuk Kim set_nid(pages[idx], i, 0, false); 678e05df3b1SJaegeuk Kim } 679e05df3b1SJaegeuk Kim 680a225dca3Sshifei10.ge if (offset[idx + 1] == 0) { 681e05df3b1SJaegeuk Kim dn->node_page = pages[idx]; 682e05df3b1SJaegeuk Kim dn->nid = nid[idx]; 683e05df3b1SJaegeuk Kim truncate_node(dn); 684e05df3b1SJaegeuk Kim } else { 685e05df3b1SJaegeuk Kim f2fs_put_page(pages[idx], 1); 686e05df3b1SJaegeuk Kim } 687e05df3b1SJaegeuk Kim offset[idx]++; 688a225dca3Sshifei10.ge offset[idx + 1] = 0; 689a225dca3Sshifei10.ge idx--; 690e05df3b1SJaegeuk Kim fail: 691a225dca3Sshifei10.ge for (i = idx; i >= 0; i--) 692e05df3b1SJaegeuk Kim f2fs_put_page(pages[i], 1); 69351dd6249SNamjae Jeon 69451dd6249SNamjae Jeon trace_f2fs_truncate_partial_nodes(dn->inode, nid, depth, err); 69551dd6249SNamjae Jeon 696e05df3b1SJaegeuk Kim return err; 697e05df3b1SJaegeuk Kim } 698e05df3b1SJaegeuk Kim 6990a8165d7SJaegeuk Kim /* 700e05df3b1SJaegeuk Kim * All the block addresses of data and nodes should be nullified. 701e05df3b1SJaegeuk Kim */ 702e05df3b1SJaegeuk Kim int truncate_inode_blocks(struct inode *inode, pgoff_t from) 703e05df3b1SJaegeuk Kim { 7044081363fSJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 705e05df3b1SJaegeuk Kim int err = 0, cont = 1; 706e05df3b1SJaegeuk Kim int level, offset[4], noffset[4]; 7077dd690c8SJaegeuk Kim unsigned int nofs = 0; 70858bfaf44SJaegeuk Kim struct f2fs_inode *ri; 709e05df3b1SJaegeuk Kim struct dnode_of_data dn; 710e05df3b1SJaegeuk Kim struct page *page; 711e05df3b1SJaegeuk Kim 71251dd6249SNamjae Jeon trace_f2fs_truncate_inode_blocks_enter(inode, from); 71351dd6249SNamjae Jeon 714de93653fSJaegeuk Kim level = get_node_path(F2FS_I(inode), from, offset, noffset); 715afcb7ca0SJaegeuk Kim restart: 716e05df3b1SJaegeuk Kim page = get_node_page(sbi, inode->i_ino); 71751dd6249SNamjae Jeon if (IS_ERR(page)) { 71851dd6249SNamjae Jeon trace_f2fs_truncate_inode_blocks_exit(inode, PTR_ERR(page)); 719e05df3b1SJaegeuk Kim return PTR_ERR(page); 72051dd6249SNamjae Jeon } 721e05df3b1SJaegeuk Kim 722e05df3b1SJaegeuk Kim set_new_dnode(&dn, inode, page, NULL, 0); 723e05df3b1SJaegeuk Kim unlock_page(page); 724e05df3b1SJaegeuk Kim 72558bfaf44SJaegeuk Kim ri = F2FS_INODE(page); 726e05df3b1SJaegeuk Kim switch (level) { 727e05df3b1SJaegeuk Kim case 0: 728e05df3b1SJaegeuk Kim case 1: 729e05df3b1SJaegeuk Kim nofs = noffset[1]; 730e05df3b1SJaegeuk Kim break; 731e05df3b1SJaegeuk Kim case 2: 732e05df3b1SJaegeuk Kim nofs = noffset[1]; 733e05df3b1SJaegeuk Kim if (!offset[level - 1]) 734e05df3b1SJaegeuk Kim goto skip_partial; 73558bfaf44SJaegeuk Kim err = truncate_partial_nodes(&dn, ri, offset, level); 736e05df3b1SJaegeuk Kim if (err < 0 && err != -ENOENT) 737e05df3b1SJaegeuk Kim goto fail; 738e05df3b1SJaegeuk Kim nofs += 1 + NIDS_PER_BLOCK; 739e05df3b1SJaegeuk Kim break; 740e05df3b1SJaegeuk Kim case 3: 741e05df3b1SJaegeuk Kim nofs = 5 + 2 * NIDS_PER_BLOCK; 742e05df3b1SJaegeuk Kim if (!offset[level - 1]) 743e05df3b1SJaegeuk Kim goto skip_partial; 74458bfaf44SJaegeuk Kim err = truncate_partial_nodes(&dn, ri, offset, level); 745e05df3b1SJaegeuk Kim if (err < 0 && err != -ENOENT) 746e05df3b1SJaegeuk Kim goto fail; 747e05df3b1SJaegeuk Kim break; 748e05df3b1SJaegeuk Kim default: 749e05df3b1SJaegeuk Kim BUG(); 750e05df3b1SJaegeuk Kim } 751e05df3b1SJaegeuk Kim 752e05df3b1SJaegeuk Kim skip_partial: 753e05df3b1SJaegeuk Kim while (cont) { 75458bfaf44SJaegeuk Kim dn.nid = le32_to_cpu(ri->i_nid[offset[0] - NODE_DIR1_BLOCK]); 755e05df3b1SJaegeuk Kim switch (offset[0]) { 756e05df3b1SJaegeuk Kim case NODE_DIR1_BLOCK: 757e05df3b1SJaegeuk Kim case NODE_DIR2_BLOCK: 758e05df3b1SJaegeuk Kim err = truncate_dnode(&dn); 759e05df3b1SJaegeuk Kim break; 760e05df3b1SJaegeuk Kim 761e05df3b1SJaegeuk Kim case NODE_IND1_BLOCK: 762e05df3b1SJaegeuk Kim case NODE_IND2_BLOCK: 763e05df3b1SJaegeuk Kim err = truncate_nodes(&dn, nofs, offset[1], 2); 764e05df3b1SJaegeuk Kim break; 765e05df3b1SJaegeuk Kim 766e05df3b1SJaegeuk Kim case NODE_DIND_BLOCK: 767e05df3b1SJaegeuk Kim err = truncate_nodes(&dn, nofs, offset[1], 3); 768e05df3b1SJaegeuk Kim cont = 0; 769e05df3b1SJaegeuk Kim break; 770e05df3b1SJaegeuk Kim 771e05df3b1SJaegeuk Kim default: 772e05df3b1SJaegeuk Kim BUG(); 773e05df3b1SJaegeuk Kim } 774e05df3b1SJaegeuk Kim if (err < 0 && err != -ENOENT) 775e05df3b1SJaegeuk Kim goto fail; 776e05df3b1SJaegeuk Kim if (offset[1] == 0 && 77758bfaf44SJaegeuk Kim ri->i_nid[offset[0] - NODE_DIR1_BLOCK]) { 778e05df3b1SJaegeuk Kim lock_page(page); 7794ef51a8fSJaegeuk Kim if (unlikely(page->mapping != NODE_MAPPING(sbi))) { 780afcb7ca0SJaegeuk Kim f2fs_put_page(page, 1); 781afcb7ca0SJaegeuk Kim goto restart; 782afcb7ca0SJaegeuk Kim } 7833cb5ad15SJaegeuk Kim f2fs_wait_on_page_writeback(page, NODE); 78458bfaf44SJaegeuk Kim ri->i_nid[offset[0] - NODE_DIR1_BLOCK] = 0; 785e05df3b1SJaegeuk Kim set_page_dirty(page); 786e05df3b1SJaegeuk Kim unlock_page(page); 787e05df3b1SJaegeuk Kim } 788e05df3b1SJaegeuk Kim offset[1] = 0; 789e05df3b1SJaegeuk Kim offset[0]++; 790e05df3b1SJaegeuk Kim nofs += err; 791e05df3b1SJaegeuk Kim } 792e05df3b1SJaegeuk Kim fail: 793e05df3b1SJaegeuk Kim f2fs_put_page(page, 0); 79451dd6249SNamjae Jeon trace_f2fs_truncate_inode_blocks_exit(inode, err); 795e05df3b1SJaegeuk Kim return err > 0 ? 0 : err; 796e05df3b1SJaegeuk Kim } 797e05df3b1SJaegeuk Kim 7984f16fb0fSJaegeuk Kim int truncate_xattr_node(struct inode *inode, struct page *page) 7994f16fb0fSJaegeuk Kim { 8004081363fSJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 8014f16fb0fSJaegeuk Kim nid_t nid = F2FS_I(inode)->i_xattr_nid; 8024f16fb0fSJaegeuk Kim struct dnode_of_data dn; 8034f16fb0fSJaegeuk Kim struct page *npage; 8044f16fb0fSJaegeuk Kim 8054f16fb0fSJaegeuk Kim if (!nid) 8064f16fb0fSJaegeuk Kim return 0; 8074f16fb0fSJaegeuk Kim 8084f16fb0fSJaegeuk Kim npage = get_node_page(sbi, nid); 8094f16fb0fSJaegeuk Kim if (IS_ERR(npage)) 8104f16fb0fSJaegeuk Kim return PTR_ERR(npage); 8114f16fb0fSJaegeuk Kim 8124f16fb0fSJaegeuk Kim F2FS_I(inode)->i_xattr_nid = 0; 81365985d93SJaegeuk Kim 81465985d93SJaegeuk Kim /* need to do checkpoint during fsync */ 81565985d93SJaegeuk Kim F2FS_I(inode)->xattr_ver = cur_cp_version(F2FS_CKPT(sbi)); 81665985d93SJaegeuk Kim 8174f16fb0fSJaegeuk Kim set_new_dnode(&dn, inode, page, npage, nid); 8184f16fb0fSJaegeuk Kim 8194f16fb0fSJaegeuk Kim if (page) 82001d2d1aaSChao Yu dn.inode_page_locked = true; 8214f16fb0fSJaegeuk Kim truncate_node(&dn); 8224f16fb0fSJaegeuk Kim return 0; 8234f16fb0fSJaegeuk Kim } 8244f16fb0fSJaegeuk Kim 82539936837SJaegeuk Kim /* 8264f4124d0SChao Yu * Caller should grab and release a rwsem by calling f2fs_lock_op() and 8274f4124d0SChao Yu * f2fs_unlock_op(). 82839936837SJaegeuk Kim */ 82958e674d6SGu Zheng void remove_inode_page(struct inode *inode) 830e05df3b1SJaegeuk Kim { 831e05df3b1SJaegeuk Kim struct dnode_of_data dn; 832e05df3b1SJaegeuk Kim 833c2e69583SJaegeuk Kim set_new_dnode(&dn, inode, NULL, NULL, inode->i_ino); 834c2e69583SJaegeuk Kim if (get_dnode_of_data(&dn, 0, LOOKUP_NODE)) 83558e674d6SGu Zheng return; 836e05df3b1SJaegeuk Kim 837c2e69583SJaegeuk Kim if (truncate_xattr_node(inode, dn.inode_page)) { 838c2e69583SJaegeuk Kim f2fs_put_dnode(&dn); 83958e674d6SGu Zheng return; 840e05df3b1SJaegeuk Kim } 841c2e69583SJaegeuk Kim 842c2e69583SJaegeuk Kim /* remove potential inline_data blocks */ 843c2e69583SJaegeuk Kim if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || 844c2e69583SJaegeuk Kim S_ISLNK(inode->i_mode)) 845c2e69583SJaegeuk Kim truncate_data_blocks_range(&dn, 1); 846c2e69583SJaegeuk Kim 847e1c42045Sarter97 /* 0 is possible, after f2fs_new_inode() has failed */ 8489850cf4aSJaegeuk Kim f2fs_bug_on(F2FS_I_SB(inode), 8499850cf4aSJaegeuk Kim inode->i_blocks != 0 && inode->i_blocks != 1); 850c2e69583SJaegeuk Kim 851c2e69583SJaegeuk Kim /* will put inode & node pages */ 852e05df3b1SJaegeuk Kim truncate_node(&dn); 853e05df3b1SJaegeuk Kim } 854e05df3b1SJaegeuk Kim 855a014e037SJaegeuk Kim struct page *new_inode_page(struct inode *inode) 856e05df3b1SJaegeuk Kim { 857e05df3b1SJaegeuk Kim struct dnode_of_data dn; 858e05df3b1SJaegeuk Kim 859e05df3b1SJaegeuk Kim /* allocate inode page for new inode */ 860e05df3b1SJaegeuk Kim set_new_dnode(&dn, inode, NULL, NULL, inode->i_ino); 86144a83ff6SJaegeuk Kim 86244a83ff6SJaegeuk Kim /* caller should f2fs_put_page(page, 1); */ 8638ae8f162SJaegeuk Kim return new_node_page(&dn, 0, NULL); 864e05df3b1SJaegeuk Kim } 865e05df3b1SJaegeuk Kim 8668ae8f162SJaegeuk Kim struct page *new_node_page(struct dnode_of_data *dn, 8678ae8f162SJaegeuk Kim unsigned int ofs, struct page *ipage) 868e05df3b1SJaegeuk Kim { 8694081363fSJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); 870e05df3b1SJaegeuk Kim struct node_info old_ni, new_ni; 871e05df3b1SJaegeuk Kim struct page *page; 872e05df3b1SJaegeuk Kim int err; 873e05df3b1SJaegeuk Kim 8746bacf52fSJaegeuk Kim if (unlikely(is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC))) 875e05df3b1SJaegeuk Kim return ERR_PTR(-EPERM); 876e05df3b1SJaegeuk Kim 87754b591dfSJaegeuk Kim page = grab_cache_page(NODE_MAPPING(sbi), dn->nid); 878e05df3b1SJaegeuk Kim if (!page) 879e05df3b1SJaegeuk Kim return ERR_PTR(-ENOMEM); 880e05df3b1SJaegeuk Kim 8816bacf52fSJaegeuk Kim if (unlikely(!inc_valid_node_count(sbi, dn->inode))) { 8829c02740cSJaegeuk Kim err = -ENOSPC; 8839c02740cSJaegeuk Kim goto fail; 8849c02740cSJaegeuk Kim } 885e05df3b1SJaegeuk Kim 8869c02740cSJaegeuk Kim get_node_info(sbi, dn->nid, &old_ni); 887e05df3b1SJaegeuk Kim 888e05df3b1SJaegeuk Kim /* Reinitialize old_ni with new node page */ 8899850cf4aSJaegeuk Kim f2fs_bug_on(sbi, old_ni.blk_addr != NULL_ADDR); 890e05df3b1SJaegeuk Kim new_ni = old_ni; 891e05df3b1SJaegeuk Kim new_ni.ino = dn->inode->i_ino; 892479f40c4SJaegeuk Kim set_node_addr(sbi, &new_ni, NEW_ADDR, false); 8939c02740cSJaegeuk Kim 89454b591dfSJaegeuk Kim f2fs_wait_on_page_writeback(page, NODE); 8959c02740cSJaegeuk Kim fill_node_footer(page, dn->nid, dn->inode->i_ino, ofs, true); 896398b1ac5SJaegeuk Kim set_cold_node(dn->inode, page); 8979c02740cSJaegeuk Kim SetPageUptodate(page); 8989c02740cSJaegeuk Kim set_page_dirty(page); 899e05df3b1SJaegeuk Kim 9004bc8e9bcSChao Yu if (f2fs_has_xattr_block(ofs)) 901479bd73aSJaegeuk Kim F2FS_I(dn->inode)->i_xattr_nid = dn->nid; 902479bd73aSJaegeuk Kim 903e05df3b1SJaegeuk Kim dn->node_page = page; 9048ae8f162SJaegeuk Kim if (ipage) 9058ae8f162SJaegeuk Kim update_inode(dn->inode, ipage); 9068ae8f162SJaegeuk Kim else 907e05df3b1SJaegeuk Kim sync_inode_page(dn); 908e05df3b1SJaegeuk Kim if (ofs == 0) 909e05df3b1SJaegeuk Kim inc_valid_inode_count(sbi); 910e05df3b1SJaegeuk Kim 911e05df3b1SJaegeuk Kim return page; 912e05df3b1SJaegeuk Kim 913e05df3b1SJaegeuk Kim fail: 91471e9fec5SJaegeuk Kim clear_node_page_dirty(page); 915e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 916e05df3b1SJaegeuk Kim return ERR_PTR(err); 917e05df3b1SJaegeuk Kim } 918e05df3b1SJaegeuk Kim 91956ae674cSJaegeuk Kim /* 92056ae674cSJaegeuk Kim * Caller should do after getting the following values. 92156ae674cSJaegeuk Kim * 0: f2fs_put_page(page, 0) 92256ae674cSJaegeuk Kim * LOCKED_PAGE: f2fs_put_page(page, 1) 92356ae674cSJaegeuk Kim * error: nothing 92456ae674cSJaegeuk Kim */ 92593dfe2acSJaegeuk Kim static int read_node_page(struct page *page, int rw) 926e05df3b1SJaegeuk Kim { 9274081363fSJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_P_SB(page); 928e05df3b1SJaegeuk Kim struct node_info ni; 929e05df3b1SJaegeuk Kim 930e05df3b1SJaegeuk Kim get_node_info(sbi, page->index, &ni); 931e05df3b1SJaegeuk Kim 9326bacf52fSJaegeuk Kim if (unlikely(ni.blk_addr == NULL_ADDR)) { 933393ff91fSJaegeuk Kim f2fs_put_page(page, 1); 934e05df3b1SJaegeuk Kim return -ENOENT; 935393ff91fSJaegeuk Kim } 936393ff91fSJaegeuk Kim 93756ae674cSJaegeuk Kim if (PageUptodate(page)) 93856ae674cSJaegeuk Kim return LOCKED_PAGE; 939393ff91fSJaegeuk Kim 94093dfe2acSJaegeuk Kim return f2fs_submit_page_bio(sbi, page, ni.blk_addr, rw); 941e05df3b1SJaegeuk Kim } 942e05df3b1SJaegeuk Kim 9430a8165d7SJaegeuk Kim /* 944e05df3b1SJaegeuk Kim * Readahead a node page 945e05df3b1SJaegeuk Kim */ 946e05df3b1SJaegeuk Kim void ra_node_page(struct f2fs_sb_info *sbi, nid_t nid) 947e05df3b1SJaegeuk Kim { 948e05df3b1SJaegeuk Kim struct page *apage; 94956ae674cSJaegeuk Kim int err; 950e05df3b1SJaegeuk Kim 9514ef51a8fSJaegeuk Kim apage = find_get_page(NODE_MAPPING(sbi), nid); 952393ff91fSJaegeuk Kim if (apage && PageUptodate(apage)) { 953393ff91fSJaegeuk Kim f2fs_put_page(apage, 0); 954393ff91fSJaegeuk Kim return; 955393ff91fSJaegeuk Kim } 956e05df3b1SJaegeuk Kim f2fs_put_page(apage, 0); 957e05df3b1SJaegeuk Kim 9584ef51a8fSJaegeuk Kim apage = grab_cache_page(NODE_MAPPING(sbi), nid); 959e05df3b1SJaegeuk Kim if (!apage) 960e05df3b1SJaegeuk Kim return; 961e05df3b1SJaegeuk Kim 96256ae674cSJaegeuk Kim err = read_node_page(apage, READA); 96356ae674cSJaegeuk Kim if (err == 0) 964369a708cSJaegeuk Kim f2fs_put_page(apage, 0); 96556ae674cSJaegeuk Kim else if (err == LOCKED_PAGE) 96656ae674cSJaegeuk Kim f2fs_put_page(apage, 1); 967e05df3b1SJaegeuk Kim } 968e05df3b1SJaegeuk Kim 969e05df3b1SJaegeuk Kim struct page *get_node_page(struct f2fs_sb_info *sbi, pgoff_t nid) 970e05df3b1SJaegeuk Kim { 97156ae674cSJaegeuk Kim struct page *page; 97256ae674cSJaegeuk Kim int err; 973afcb7ca0SJaegeuk Kim repeat: 97454b591dfSJaegeuk Kim page = grab_cache_page(NODE_MAPPING(sbi), nid); 975e05df3b1SJaegeuk Kim if (!page) 976e05df3b1SJaegeuk Kim return ERR_PTR(-ENOMEM); 977e05df3b1SJaegeuk Kim 978e05df3b1SJaegeuk Kim err = read_node_page(page, READ_SYNC); 97956ae674cSJaegeuk Kim if (err < 0) 980e05df3b1SJaegeuk Kim return ERR_PTR(err); 98156ae674cSJaegeuk Kim else if (err == LOCKED_PAGE) 98256ae674cSJaegeuk Kim goto got_it; 983e05df3b1SJaegeuk Kim 984393ff91fSJaegeuk Kim lock_page(page); 9853bb5e2c8SJaegeuk Kim if (unlikely(!PageUptodate(page) || nid != nid_of_node(page))) { 986393ff91fSJaegeuk Kim f2fs_put_page(page, 1); 987393ff91fSJaegeuk Kim return ERR_PTR(-EIO); 988393ff91fSJaegeuk Kim } 9894ef51a8fSJaegeuk Kim if (unlikely(page->mapping != NODE_MAPPING(sbi))) { 990afcb7ca0SJaegeuk Kim f2fs_put_page(page, 1); 991afcb7ca0SJaegeuk Kim goto repeat; 992afcb7ca0SJaegeuk Kim } 99356ae674cSJaegeuk Kim got_it: 994e05df3b1SJaegeuk Kim return page; 995e05df3b1SJaegeuk Kim } 996e05df3b1SJaegeuk Kim 9970a8165d7SJaegeuk Kim /* 998e05df3b1SJaegeuk Kim * Return a locked page for the desired node page. 999e05df3b1SJaegeuk Kim * And, readahead MAX_RA_NODE number of node pages. 1000e05df3b1SJaegeuk Kim */ 1001e05df3b1SJaegeuk Kim struct page *get_node_page_ra(struct page *parent, int start) 1002e05df3b1SJaegeuk Kim { 10034081363fSJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_P_SB(parent); 1004c718379bSJaegeuk Kim struct blk_plug plug; 1005e05df3b1SJaegeuk Kim struct page *page; 100656ae674cSJaegeuk Kim int err, i, end; 100756ae674cSJaegeuk Kim nid_t nid; 1008e05df3b1SJaegeuk Kim 1009e05df3b1SJaegeuk Kim /* First, try getting the desired direct node. */ 1010e05df3b1SJaegeuk Kim nid = get_nid(parent, start, false); 1011e05df3b1SJaegeuk Kim if (!nid) 1012e05df3b1SJaegeuk Kim return ERR_PTR(-ENOENT); 1013afcb7ca0SJaegeuk Kim repeat: 10144ef51a8fSJaegeuk Kim page = grab_cache_page(NODE_MAPPING(sbi), nid); 1015e05df3b1SJaegeuk Kim if (!page) 1016e05df3b1SJaegeuk Kim return ERR_PTR(-ENOMEM); 1017e05df3b1SJaegeuk Kim 101866d36a29SJaegeuk Kim err = read_node_page(page, READ_SYNC); 101956ae674cSJaegeuk Kim if (err < 0) 1020e05df3b1SJaegeuk Kim return ERR_PTR(err); 102156ae674cSJaegeuk Kim else if (err == LOCKED_PAGE) 102256ae674cSJaegeuk Kim goto page_hit; 1023e05df3b1SJaegeuk Kim 1024c718379bSJaegeuk Kim blk_start_plug(&plug); 1025c718379bSJaegeuk Kim 1026e05df3b1SJaegeuk Kim /* Then, try readahead for siblings of the desired node */ 1027e05df3b1SJaegeuk Kim end = start + MAX_RA_NODE; 1028e05df3b1SJaegeuk Kim end = min(end, NIDS_PER_BLOCK); 1029e05df3b1SJaegeuk Kim for (i = start + 1; i < end; i++) { 1030e05df3b1SJaegeuk Kim nid = get_nid(parent, i, false); 1031e05df3b1SJaegeuk Kim if (!nid) 1032e05df3b1SJaegeuk Kim continue; 1033e05df3b1SJaegeuk Kim ra_node_page(sbi, nid); 1034e05df3b1SJaegeuk Kim } 1035e05df3b1SJaegeuk Kim 1036c718379bSJaegeuk Kim blk_finish_plug(&plug); 1037c718379bSJaegeuk Kim 1038e05df3b1SJaegeuk Kim lock_page(page); 10394ef51a8fSJaegeuk Kim if (unlikely(page->mapping != NODE_MAPPING(sbi))) { 1040afcb7ca0SJaegeuk Kim f2fs_put_page(page, 1); 1041afcb7ca0SJaegeuk Kim goto repeat; 1042afcb7ca0SJaegeuk Kim } 1043e0f56cb4SNamjae Jeon page_hit: 10446bacf52fSJaegeuk Kim if (unlikely(!PageUptodate(page))) { 1045e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 1046e05df3b1SJaegeuk Kim return ERR_PTR(-EIO); 1047e05df3b1SJaegeuk Kim } 1048e05df3b1SJaegeuk Kim return page; 1049e05df3b1SJaegeuk Kim } 1050e05df3b1SJaegeuk Kim 1051e05df3b1SJaegeuk Kim void sync_inode_page(struct dnode_of_data *dn) 1052e05df3b1SJaegeuk Kim { 1053e05df3b1SJaegeuk Kim if (IS_INODE(dn->node_page) || dn->inode_page == dn->node_page) { 1054e05df3b1SJaegeuk Kim update_inode(dn->inode, dn->node_page); 1055e05df3b1SJaegeuk Kim } else if (dn->inode_page) { 1056e05df3b1SJaegeuk Kim if (!dn->inode_page_locked) 1057e05df3b1SJaegeuk Kim lock_page(dn->inode_page); 1058e05df3b1SJaegeuk Kim update_inode(dn->inode, dn->inode_page); 1059e05df3b1SJaegeuk Kim if (!dn->inode_page_locked) 1060e05df3b1SJaegeuk Kim unlock_page(dn->inode_page); 1061e05df3b1SJaegeuk Kim } else { 106239936837SJaegeuk Kim update_inode_page(dn->inode); 1063e05df3b1SJaegeuk Kim } 1064e05df3b1SJaegeuk Kim } 1065e05df3b1SJaegeuk Kim 1066e05df3b1SJaegeuk Kim int sync_node_pages(struct f2fs_sb_info *sbi, nid_t ino, 1067e05df3b1SJaegeuk Kim struct writeback_control *wbc) 1068e05df3b1SJaegeuk Kim { 1069e05df3b1SJaegeuk Kim pgoff_t index, end; 1070e05df3b1SJaegeuk Kim struct pagevec pvec; 1071e05df3b1SJaegeuk Kim int step = ino ? 2 : 0; 1072e05df3b1SJaegeuk Kim int nwritten = 0, wrote = 0; 1073e05df3b1SJaegeuk Kim 1074e05df3b1SJaegeuk Kim pagevec_init(&pvec, 0); 1075e05df3b1SJaegeuk Kim 1076e05df3b1SJaegeuk Kim next_step: 1077e05df3b1SJaegeuk Kim index = 0; 1078e05df3b1SJaegeuk Kim end = LONG_MAX; 1079e05df3b1SJaegeuk Kim 1080e05df3b1SJaegeuk Kim while (index <= end) { 1081e05df3b1SJaegeuk Kim int i, nr_pages; 10824ef51a8fSJaegeuk Kim nr_pages = pagevec_lookup_tag(&pvec, NODE_MAPPING(sbi), &index, 1083e05df3b1SJaegeuk Kim PAGECACHE_TAG_DIRTY, 1084e05df3b1SJaegeuk Kim min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1); 1085e05df3b1SJaegeuk Kim if (nr_pages == 0) 1086e05df3b1SJaegeuk Kim break; 1087e05df3b1SJaegeuk Kim 1088e05df3b1SJaegeuk Kim for (i = 0; i < nr_pages; i++) { 1089e05df3b1SJaegeuk Kim struct page *page = pvec.pages[i]; 1090e05df3b1SJaegeuk Kim 1091e05df3b1SJaegeuk Kim /* 1092e05df3b1SJaegeuk Kim * flushing sequence with step: 1093e05df3b1SJaegeuk Kim * 0. indirect nodes 1094e05df3b1SJaegeuk Kim * 1. dentry dnodes 1095e05df3b1SJaegeuk Kim * 2. file dnodes 1096e05df3b1SJaegeuk Kim */ 1097e05df3b1SJaegeuk Kim if (step == 0 && IS_DNODE(page)) 1098e05df3b1SJaegeuk Kim continue; 1099e05df3b1SJaegeuk Kim if (step == 1 && (!IS_DNODE(page) || 1100e05df3b1SJaegeuk Kim is_cold_node(page))) 1101e05df3b1SJaegeuk Kim continue; 1102e05df3b1SJaegeuk Kim if (step == 2 && (!IS_DNODE(page) || 1103e05df3b1SJaegeuk Kim !is_cold_node(page))) 1104e05df3b1SJaegeuk Kim continue; 1105e05df3b1SJaegeuk Kim 1106e05df3b1SJaegeuk Kim /* 1107e05df3b1SJaegeuk Kim * If an fsync mode, 1108e05df3b1SJaegeuk Kim * we should not skip writing node pages. 1109e05df3b1SJaegeuk Kim */ 1110e05df3b1SJaegeuk Kim if (ino && ino_of_node(page) == ino) 1111e05df3b1SJaegeuk Kim lock_page(page); 1112e05df3b1SJaegeuk Kim else if (!trylock_page(page)) 1113e05df3b1SJaegeuk Kim continue; 1114e05df3b1SJaegeuk Kim 11154ef51a8fSJaegeuk Kim if (unlikely(page->mapping != NODE_MAPPING(sbi))) { 1116e05df3b1SJaegeuk Kim continue_unlock: 1117e05df3b1SJaegeuk Kim unlock_page(page); 1118e05df3b1SJaegeuk Kim continue; 1119e05df3b1SJaegeuk Kim } 1120e05df3b1SJaegeuk Kim if (ino && ino_of_node(page) != ino) 1121e05df3b1SJaegeuk Kim goto continue_unlock; 1122e05df3b1SJaegeuk Kim 1123e05df3b1SJaegeuk Kim if (!PageDirty(page)) { 1124e05df3b1SJaegeuk Kim /* someone wrote it for us */ 1125e05df3b1SJaegeuk Kim goto continue_unlock; 1126e05df3b1SJaegeuk Kim } 1127e05df3b1SJaegeuk Kim 1128e05df3b1SJaegeuk Kim if (!clear_page_dirty_for_io(page)) 1129e05df3b1SJaegeuk Kim goto continue_unlock; 1130e05df3b1SJaegeuk Kim 1131e05df3b1SJaegeuk Kim /* called by fsync() */ 1132e05df3b1SJaegeuk Kim if (ino && IS_DNODE(page)) { 1133e05df3b1SJaegeuk Kim set_fsync_mark(page, 1); 113488bd02c9SJaegeuk Kim if (IS_INODE(page)) { 113588bd02c9SJaegeuk Kim if (!is_checkpointed_node(sbi, ino) && 113688bd02c9SJaegeuk Kim !has_fsynced_inode(sbi, ino)) 113788bd02c9SJaegeuk Kim set_dentry_mark(page, 1); 113888bd02c9SJaegeuk Kim else 113988bd02c9SJaegeuk Kim set_dentry_mark(page, 0); 114088bd02c9SJaegeuk Kim } 1141e05df3b1SJaegeuk Kim nwritten++; 1142e05df3b1SJaegeuk Kim } else { 1143e05df3b1SJaegeuk Kim set_fsync_mark(page, 0); 1144e05df3b1SJaegeuk Kim set_dentry_mark(page, 0); 1145e05df3b1SJaegeuk Kim } 114652746519SJaegeuk Kim 114752746519SJaegeuk Kim if (NODE_MAPPING(sbi)->a_ops->writepage(page, wbc)) 114852746519SJaegeuk Kim unlock_page(page); 114952746519SJaegeuk Kim else 1150e05df3b1SJaegeuk Kim wrote++; 1151e05df3b1SJaegeuk Kim 1152e05df3b1SJaegeuk Kim if (--wbc->nr_to_write == 0) 1153e05df3b1SJaegeuk Kim break; 1154e05df3b1SJaegeuk Kim } 1155e05df3b1SJaegeuk Kim pagevec_release(&pvec); 1156e05df3b1SJaegeuk Kim cond_resched(); 1157e05df3b1SJaegeuk Kim 1158e05df3b1SJaegeuk Kim if (wbc->nr_to_write == 0) { 1159e05df3b1SJaegeuk Kim step = 2; 1160e05df3b1SJaegeuk Kim break; 1161e05df3b1SJaegeuk Kim } 1162e05df3b1SJaegeuk Kim } 1163e05df3b1SJaegeuk Kim 1164e05df3b1SJaegeuk Kim if (step < 2) { 1165e05df3b1SJaegeuk Kim step++; 1166e05df3b1SJaegeuk Kim goto next_step; 1167e05df3b1SJaegeuk Kim } 1168e05df3b1SJaegeuk Kim 1169e05df3b1SJaegeuk Kim if (wrote) 1170458e6197SJaegeuk Kim f2fs_submit_merged_bio(sbi, NODE, WRITE); 1171e05df3b1SJaegeuk Kim return nwritten; 1172e05df3b1SJaegeuk Kim } 1173e05df3b1SJaegeuk Kim 1174cfe58f9dSJaegeuk Kim int wait_on_node_pages_writeback(struct f2fs_sb_info *sbi, nid_t ino) 1175cfe58f9dSJaegeuk Kim { 1176cfe58f9dSJaegeuk Kim pgoff_t index = 0, end = LONG_MAX; 1177cfe58f9dSJaegeuk Kim struct pagevec pvec; 1178cfe58f9dSJaegeuk Kim int ret2 = 0, ret = 0; 1179cfe58f9dSJaegeuk Kim 1180cfe58f9dSJaegeuk Kim pagevec_init(&pvec, 0); 11814ef51a8fSJaegeuk Kim 11824ef51a8fSJaegeuk Kim while (index <= end) { 11834ef51a8fSJaegeuk Kim int i, nr_pages; 11844ef51a8fSJaegeuk Kim nr_pages = pagevec_lookup_tag(&pvec, NODE_MAPPING(sbi), &index, 1185cfe58f9dSJaegeuk Kim PAGECACHE_TAG_WRITEBACK, 11864ef51a8fSJaegeuk Kim min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1); 11874ef51a8fSJaegeuk Kim if (nr_pages == 0) 11884ef51a8fSJaegeuk Kim break; 1189cfe58f9dSJaegeuk Kim 1190cfe58f9dSJaegeuk Kim for (i = 0; i < nr_pages; i++) { 1191cfe58f9dSJaegeuk Kim struct page *page = pvec.pages[i]; 1192cfe58f9dSJaegeuk Kim 1193cfe58f9dSJaegeuk Kim /* until radix tree lookup accepts end_index */ 1194cfb271d4SChao Yu if (unlikely(page->index > end)) 1195cfe58f9dSJaegeuk Kim continue; 1196cfe58f9dSJaegeuk Kim 11974bf08ff6SChao Yu if (ino && ino_of_node(page) == ino) { 11983cb5ad15SJaegeuk Kim f2fs_wait_on_page_writeback(page, NODE); 1199cfe58f9dSJaegeuk Kim if (TestClearPageError(page)) 1200cfe58f9dSJaegeuk Kim ret = -EIO; 1201cfe58f9dSJaegeuk Kim } 12024bf08ff6SChao Yu } 1203cfe58f9dSJaegeuk Kim pagevec_release(&pvec); 1204cfe58f9dSJaegeuk Kim cond_resched(); 1205cfe58f9dSJaegeuk Kim } 1206cfe58f9dSJaegeuk Kim 12074ef51a8fSJaegeuk Kim if (unlikely(test_and_clear_bit(AS_ENOSPC, &NODE_MAPPING(sbi)->flags))) 1208cfe58f9dSJaegeuk Kim ret2 = -ENOSPC; 12094ef51a8fSJaegeuk Kim if (unlikely(test_and_clear_bit(AS_EIO, &NODE_MAPPING(sbi)->flags))) 1210cfe58f9dSJaegeuk Kim ret2 = -EIO; 1211cfe58f9dSJaegeuk Kim if (!ret) 1212cfe58f9dSJaegeuk Kim ret = ret2; 1213cfe58f9dSJaegeuk Kim return ret; 1214cfe58f9dSJaegeuk Kim } 1215cfe58f9dSJaegeuk Kim 1216e05df3b1SJaegeuk Kim static int f2fs_write_node_page(struct page *page, 1217e05df3b1SJaegeuk Kim struct writeback_control *wbc) 1218e05df3b1SJaegeuk Kim { 12194081363fSJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_P_SB(page); 1220e05df3b1SJaegeuk Kim nid_t nid; 1221e05df3b1SJaegeuk Kim block_t new_addr; 1222e05df3b1SJaegeuk Kim struct node_info ni; 1223fb5566daSJaegeuk Kim struct f2fs_io_info fio = { 1224fb5566daSJaegeuk Kim .type = NODE, 1225fb5566daSJaegeuk Kim .rw = (wbc->sync_mode == WB_SYNC_ALL) ? WRITE_SYNC : WRITE, 1226fb5566daSJaegeuk Kim }; 1227e05df3b1SJaegeuk Kim 1228ecda0de3SChao Yu trace_f2fs_writepage(page, NODE); 1229ecda0de3SChao Yu 1230cfb271d4SChao Yu if (unlikely(sbi->por_doing)) 123187a9bd26SJaegeuk Kim goto redirty_out; 1232cf779cabSJaegeuk Kim if (unlikely(f2fs_cp_error(sbi))) 1233cf779cabSJaegeuk Kim goto redirty_out; 123487a9bd26SJaegeuk Kim 12353cb5ad15SJaegeuk Kim f2fs_wait_on_page_writeback(page, NODE); 1236e05df3b1SJaegeuk Kim 1237e05df3b1SJaegeuk Kim /* get old block addr of this node page */ 1238e05df3b1SJaegeuk Kim nid = nid_of_node(page); 12399850cf4aSJaegeuk Kim f2fs_bug_on(sbi, page->index != nid); 1240e05df3b1SJaegeuk Kim 1241e05df3b1SJaegeuk Kim get_node_info(sbi, nid, &ni); 1242e05df3b1SJaegeuk Kim 1243e05df3b1SJaegeuk Kim /* This page is already truncated */ 12446bacf52fSJaegeuk Kim if (unlikely(ni.blk_addr == NULL_ADDR)) { 124539936837SJaegeuk Kim dec_page_count(sbi, F2FS_DIRTY_NODES); 124639936837SJaegeuk Kim unlock_page(page); 124739936837SJaegeuk Kim return 0; 124839936837SJaegeuk Kim } 1249e05df3b1SJaegeuk Kim 125087a9bd26SJaegeuk Kim if (wbc->for_reclaim) 125187a9bd26SJaegeuk Kim goto redirty_out; 125208d8058bSJaegeuk Kim 1253b3582c68SChao Yu down_read(&sbi->node_write); 1254e05df3b1SJaegeuk Kim set_page_writeback(page); 1255fb5566daSJaegeuk Kim write_node_page(sbi, page, &fio, nid, ni.blk_addr, &new_addr); 1256479f40c4SJaegeuk Kim set_node_addr(sbi, &ni, new_addr, is_fsync_dnode(page)); 1257e05df3b1SJaegeuk Kim dec_page_count(sbi, F2FS_DIRTY_NODES); 1258b3582c68SChao Yu up_read(&sbi->node_write); 1259e05df3b1SJaegeuk Kim unlock_page(page); 1260e05df3b1SJaegeuk Kim return 0; 126187a9bd26SJaegeuk Kim 126287a9bd26SJaegeuk Kim redirty_out: 126376f60268SJaegeuk Kim redirty_page_for_writepage(wbc, page); 126487a9bd26SJaegeuk Kim return AOP_WRITEPAGE_ACTIVATE; 1265e05df3b1SJaegeuk Kim } 1266e05df3b1SJaegeuk Kim 1267e05df3b1SJaegeuk Kim static int f2fs_write_node_pages(struct address_space *mapping, 1268e05df3b1SJaegeuk Kim struct writeback_control *wbc) 1269e05df3b1SJaegeuk Kim { 12704081363fSJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_M_SB(mapping); 127150c8cdb3SJaegeuk Kim long diff; 1272e05df3b1SJaegeuk Kim 1273e5748434SChao Yu trace_f2fs_writepages(mapping->host, wbc, NODE); 1274e5748434SChao Yu 12754660f9c0SJaegeuk Kim /* balancing f2fs's metadata in background */ 12764660f9c0SJaegeuk Kim f2fs_balance_fs_bg(sbi); 1277e05df3b1SJaegeuk Kim 1278a7fdffbdSJaegeuk Kim /* collect a number of dirty node pages and write together */ 127987d6f890SJaegeuk Kim if (get_pages(sbi, F2FS_DIRTY_NODES) < nr_pages_to_skip(sbi, NODE)) 1280d3baf95dSJaegeuk Kim goto skip_write; 1281a7fdffbdSJaegeuk Kim 128250c8cdb3SJaegeuk Kim diff = nr_pages_to_write(sbi, NODE, wbc); 1283fb5566daSJaegeuk Kim wbc->sync_mode = WB_SYNC_NONE; 1284e05df3b1SJaegeuk Kim sync_node_pages(sbi, 0, wbc); 128550c8cdb3SJaegeuk Kim wbc->nr_to_write = max((long)0, wbc->nr_to_write - diff); 1286e05df3b1SJaegeuk Kim return 0; 1287d3baf95dSJaegeuk Kim 1288d3baf95dSJaegeuk Kim skip_write: 1289d3baf95dSJaegeuk Kim wbc->pages_skipped += get_pages(sbi, F2FS_DIRTY_NODES); 1290d3baf95dSJaegeuk Kim return 0; 1291e05df3b1SJaegeuk Kim } 1292e05df3b1SJaegeuk Kim 1293e05df3b1SJaegeuk Kim static int f2fs_set_node_page_dirty(struct page *page) 1294e05df3b1SJaegeuk Kim { 129526c6b887SJaegeuk Kim trace_f2fs_set_page_dirty(page, NODE); 129626c6b887SJaegeuk Kim 1297e05df3b1SJaegeuk Kim SetPageUptodate(page); 1298e05df3b1SJaegeuk Kim if (!PageDirty(page)) { 1299e05df3b1SJaegeuk Kim __set_page_dirty_nobuffers(page); 13004081363fSJaegeuk Kim inc_page_count(F2FS_P_SB(page), F2FS_DIRTY_NODES); 1301e05df3b1SJaegeuk Kim SetPagePrivate(page); 1302e05df3b1SJaegeuk Kim return 1; 1303e05df3b1SJaegeuk Kim } 1304e05df3b1SJaegeuk Kim return 0; 1305e05df3b1SJaegeuk Kim } 1306e05df3b1SJaegeuk Kim 1307d47992f8SLukas Czerner static void f2fs_invalidate_node_page(struct page *page, unsigned int offset, 1308d47992f8SLukas Czerner unsigned int length) 1309e05df3b1SJaegeuk Kim { 1310e05df3b1SJaegeuk Kim struct inode *inode = page->mapping->host; 1311e05df3b1SJaegeuk Kim if (PageDirty(page)) 13124081363fSJaegeuk Kim dec_page_count(F2FS_I_SB(inode), F2FS_DIRTY_NODES); 1313e05df3b1SJaegeuk Kim ClearPagePrivate(page); 1314e05df3b1SJaegeuk Kim } 1315e05df3b1SJaegeuk Kim 1316e05df3b1SJaegeuk Kim static int f2fs_release_node_page(struct page *page, gfp_t wait) 1317e05df3b1SJaegeuk Kim { 1318e05df3b1SJaegeuk Kim ClearPagePrivate(page); 1319c3850aa1SJaegeuk Kim return 1; 1320e05df3b1SJaegeuk Kim } 1321e05df3b1SJaegeuk Kim 13220a8165d7SJaegeuk Kim /* 1323e05df3b1SJaegeuk Kim * Structure of the f2fs node operations 1324e05df3b1SJaegeuk Kim */ 1325e05df3b1SJaegeuk Kim const struct address_space_operations f2fs_node_aops = { 1326e05df3b1SJaegeuk Kim .writepage = f2fs_write_node_page, 1327e05df3b1SJaegeuk Kim .writepages = f2fs_write_node_pages, 1328e05df3b1SJaegeuk Kim .set_page_dirty = f2fs_set_node_page_dirty, 1329e05df3b1SJaegeuk Kim .invalidatepage = f2fs_invalidate_node_page, 1330e05df3b1SJaegeuk Kim .releasepage = f2fs_release_node_page, 1331e05df3b1SJaegeuk Kim }; 1332e05df3b1SJaegeuk Kim 13338a7ed66aSJaegeuk Kim static struct free_nid *__lookup_free_nid_list(struct f2fs_nm_info *nm_i, 13348a7ed66aSJaegeuk Kim nid_t n) 1335e05df3b1SJaegeuk Kim { 13368a7ed66aSJaegeuk Kim return radix_tree_lookup(&nm_i->free_nid_root, n); 13373aa770a9SNamjae Jeon } 1338e05df3b1SJaegeuk Kim 13398a7ed66aSJaegeuk Kim static void __del_from_free_nid_list(struct f2fs_nm_info *nm_i, 13408a7ed66aSJaegeuk Kim struct free_nid *i) 1341e05df3b1SJaegeuk Kim { 1342e05df3b1SJaegeuk Kim list_del(&i->list); 13438a7ed66aSJaegeuk Kim radix_tree_delete(&nm_i->free_nid_root, i->nid); 1344e05df3b1SJaegeuk Kim } 1345e05df3b1SJaegeuk Kim 13466fb03f3aSJaegeuk Kim static int add_free_nid(struct f2fs_sb_info *sbi, nid_t nid, bool build) 1347e05df3b1SJaegeuk Kim { 13486fb03f3aSJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1349e05df3b1SJaegeuk Kim struct free_nid *i; 135059bbd474SJaegeuk Kim struct nat_entry *ne; 135159bbd474SJaegeuk Kim bool allocated = false; 1352e05df3b1SJaegeuk Kim 13536fb03f3aSJaegeuk Kim if (!available_free_memory(sbi, FREE_NIDS)) 135423d38844SHaicheng Li return -1; 13559198acebSJaegeuk Kim 13569198acebSJaegeuk Kim /* 0 nid should not be used */ 1357cfb271d4SChao Yu if (unlikely(nid == 0)) 13589198acebSJaegeuk Kim return 0; 135959bbd474SJaegeuk Kim 13607bd59381SGu Zheng if (build) { 136159bbd474SJaegeuk Kim /* do not add allocated nids */ 136259bbd474SJaegeuk Kim read_lock(&nm_i->nat_tree_lock); 136359bbd474SJaegeuk Kim ne = __lookup_nat_cache(nm_i, nid); 13648a7ed66aSJaegeuk Kim if (ne && 13657ef35e3bSJaegeuk Kim (!get_nat_flag(ne, IS_CHECKPOINTED) || 13667ef35e3bSJaegeuk Kim nat_get_blkaddr(ne) != NULL_ADDR)) 136759bbd474SJaegeuk Kim allocated = true; 136859bbd474SJaegeuk Kim read_unlock(&nm_i->nat_tree_lock); 136959bbd474SJaegeuk Kim if (allocated) 137059bbd474SJaegeuk Kim return 0; 1371e05df3b1SJaegeuk Kim } 13727bd59381SGu Zheng 13737bd59381SGu Zheng i = f2fs_kmem_cache_alloc(free_nid_slab, GFP_NOFS); 1374e05df3b1SJaegeuk Kim i->nid = nid; 1375e05df3b1SJaegeuk Kim i->state = NID_NEW; 1376e05df3b1SJaegeuk Kim 1377e05df3b1SJaegeuk Kim spin_lock(&nm_i->free_nid_list_lock); 13788a7ed66aSJaegeuk Kim if (radix_tree_insert(&nm_i->free_nid_root, i->nid, i)) { 1379e05df3b1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1380e05df3b1SJaegeuk Kim kmem_cache_free(free_nid_slab, i); 1381e05df3b1SJaegeuk Kim return 0; 1382e05df3b1SJaegeuk Kim } 1383e05df3b1SJaegeuk Kim list_add_tail(&i->list, &nm_i->free_nid_list); 1384e05df3b1SJaegeuk Kim nm_i->fcnt++; 1385e05df3b1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1386e05df3b1SJaegeuk Kim return 1; 1387e05df3b1SJaegeuk Kim } 1388e05df3b1SJaegeuk Kim 1389e05df3b1SJaegeuk Kim static void remove_free_nid(struct f2fs_nm_info *nm_i, nid_t nid) 1390e05df3b1SJaegeuk Kim { 1391e05df3b1SJaegeuk Kim struct free_nid *i; 1392cf0ee0f0SChao Yu bool need_free = false; 1393cf0ee0f0SChao Yu 1394e05df3b1SJaegeuk Kim spin_lock(&nm_i->free_nid_list_lock); 13958a7ed66aSJaegeuk Kim i = __lookup_free_nid_list(nm_i, nid); 1396e05df3b1SJaegeuk Kim if (i && i->state == NID_NEW) { 13978a7ed66aSJaegeuk Kim __del_from_free_nid_list(nm_i, i); 1398e05df3b1SJaegeuk Kim nm_i->fcnt--; 1399cf0ee0f0SChao Yu need_free = true; 1400e05df3b1SJaegeuk Kim } 1401e05df3b1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1402cf0ee0f0SChao Yu 1403cf0ee0f0SChao Yu if (need_free) 1404cf0ee0f0SChao Yu kmem_cache_free(free_nid_slab, i); 1405e05df3b1SJaegeuk Kim } 1406e05df3b1SJaegeuk Kim 14076fb03f3aSJaegeuk Kim static void scan_nat_page(struct f2fs_sb_info *sbi, 1408e05df3b1SJaegeuk Kim struct page *nat_page, nid_t start_nid) 1409e05df3b1SJaegeuk Kim { 14106fb03f3aSJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1411e05df3b1SJaegeuk Kim struct f2fs_nat_block *nat_blk = page_address(nat_page); 1412e05df3b1SJaegeuk Kim block_t blk_addr; 1413e05df3b1SJaegeuk Kim int i; 1414e05df3b1SJaegeuk Kim 1415e05df3b1SJaegeuk Kim i = start_nid % NAT_ENTRY_PER_BLOCK; 1416e05df3b1SJaegeuk Kim 1417e05df3b1SJaegeuk Kim for (; i < NAT_ENTRY_PER_BLOCK; i++, start_nid++) { 141823d38844SHaicheng Li 1419cfb271d4SChao Yu if (unlikely(start_nid >= nm_i->max_nid)) 142004431c44SJaegeuk Kim break; 142123d38844SHaicheng Li 1422e05df3b1SJaegeuk Kim blk_addr = le32_to_cpu(nat_blk->entries[i].block_addr); 14239850cf4aSJaegeuk Kim f2fs_bug_on(sbi, blk_addr == NEW_ADDR); 142423d38844SHaicheng Li if (blk_addr == NULL_ADDR) { 14256fb03f3aSJaegeuk Kim if (add_free_nid(sbi, start_nid, true) < 0) 142623d38844SHaicheng Li break; 142723d38844SHaicheng Li } 1428e05df3b1SJaegeuk Kim } 1429e05df3b1SJaegeuk Kim } 1430e05df3b1SJaegeuk Kim 1431e05df3b1SJaegeuk Kim static void build_free_nids(struct f2fs_sb_info *sbi) 1432e05df3b1SJaegeuk Kim { 1433e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1434e05df3b1SJaegeuk Kim struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); 1435e05df3b1SJaegeuk Kim struct f2fs_summary_block *sum = curseg->sum_blk; 14368760952dSHaicheng Li int i = 0; 143755008d84SJaegeuk Kim nid_t nid = nm_i->next_scan_nid; 1438e05df3b1SJaegeuk Kim 143955008d84SJaegeuk Kim /* Enough entries */ 144055008d84SJaegeuk Kim if (nm_i->fcnt > NAT_ENTRY_PER_BLOCK) 144155008d84SJaegeuk Kim return; 1442e05df3b1SJaegeuk Kim 144355008d84SJaegeuk Kim /* readahead nat pages to be scanned */ 1444662befdaSChao Yu ra_meta_pages(sbi, NAT_BLOCK_OFFSET(nid), FREE_NID_PAGES, META_NAT); 1445e05df3b1SJaegeuk Kim 1446e05df3b1SJaegeuk Kim while (1) { 1447e05df3b1SJaegeuk Kim struct page *page = get_current_nat_page(sbi, nid); 1448e05df3b1SJaegeuk Kim 14496fb03f3aSJaegeuk Kim scan_nat_page(sbi, page, nid); 1450e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 1451e05df3b1SJaegeuk Kim 1452e05df3b1SJaegeuk Kim nid += (NAT_ENTRY_PER_BLOCK - (nid % NAT_ENTRY_PER_BLOCK)); 1453cfb271d4SChao Yu if (unlikely(nid >= nm_i->max_nid)) 1454e05df3b1SJaegeuk Kim nid = 0; 145555008d84SJaegeuk Kim 145655008d84SJaegeuk Kim if (i++ == FREE_NID_PAGES) 1457e05df3b1SJaegeuk Kim break; 1458e05df3b1SJaegeuk Kim } 1459e05df3b1SJaegeuk Kim 146055008d84SJaegeuk Kim /* go to the next free nat pages to find free nids abundantly */ 146155008d84SJaegeuk Kim nm_i->next_scan_nid = nid; 1462e05df3b1SJaegeuk Kim 1463e05df3b1SJaegeuk Kim /* find free nids from current sum_pages */ 1464e05df3b1SJaegeuk Kim mutex_lock(&curseg->curseg_mutex); 1465e05df3b1SJaegeuk Kim for (i = 0; i < nats_in_cursum(sum); i++) { 1466e05df3b1SJaegeuk Kim block_t addr = le32_to_cpu(nat_in_journal(sum, i).block_addr); 1467e05df3b1SJaegeuk Kim nid = le32_to_cpu(nid_in_journal(sum, i)); 1468e05df3b1SJaegeuk Kim if (addr == NULL_ADDR) 14696fb03f3aSJaegeuk Kim add_free_nid(sbi, nid, true); 1470e05df3b1SJaegeuk Kim else 1471e05df3b1SJaegeuk Kim remove_free_nid(nm_i, nid); 1472e05df3b1SJaegeuk Kim } 1473e05df3b1SJaegeuk Kim mutex_unlock(&curseg->curseg_mutex); 1474e05df3b1SJaegeuk Kim } 1475e05df3b1SJaegeuk Kim 1476e05df3b1SJaegeuk Kim /* 1477e05df3b1SJaegeuk Kim * If this function returns success, caller can obtain a new nid 1478e05df3b1SJaegeuk Kim * from second parameter of this function. 1479e05df3b1SJaegeuk Kim * The returned nid could be used ino as well as nid when inode is created. 1480e05df3b1SJaegeuk Kim */ 1481e05df3b1SJaegeuk Kim bool alloc_nid(struct f2fs_sb_info *sbi, nid_t *nid) 1482e05df3b1SJaegeuk Kim { 1483e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1484e05df3b1SJaegeuk Kim struct free_nid *i = NULL; 1485e05df3b1SJaegeuk Kim retry: 14867ee0eeabSJaegeuk Kim if (unlikely(sbi->total_valid_node_count + 1 > nm_i->available_nids)) 1487e05df3b1SJaegeuk Kim return false; 1488e05df3b1SJaegeuk Kim 1489e05df3b1SJaegeuk Kim spin_lock(&nm_i->free_nid_list_lock); 1490e05df3b1SJaegeuk Kim 149155008d84SJaegeuk Kim /* We should not use stale free nids created by build_free_nids */ 1492f978f5a0SGu Zheng if (nm_i->fcnt && !on_build_free_nids(nm_i)) { 14939850cf4aSJaegeuk Kim f2fs_bug_on(sbi, list_empty(&nm_i->free_nid_list)); 14942d7b822aSChao Yu list_for_each_entry(i, &nm_i->free_nid_list, list) 1495e05df3b1SJaegeuk Kim if (i->state == NID_NEW) 1496e05df3b1SJaegeuk Kim break; 1497e05df3b1SJaegeuk Kim 14989850cf4aSJaegeuk Kim f2fs_bug_on(sbi, i->state != NID_NEW); 1499e05df3b1SJaegeuk Kim *nid = i->nid; 1500e05df3b1SJaegeuk Kim i->state = NID_ALLOC; 1501e05df3b1SJaegeuk Kim nm_i->fcnt--; 1502e05df3b1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1503e05df3b1SJaegeuk Kim return true; 1504e05df3b1SJaegeuk Kim } 150555008d84SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 150655008d84SJaegeuk Kim 150755008d84SJaegeuk Kim /* Let's scan nat pages and its caches to get free nids */ 150855008d84SJaegeuk Kim mutex_lock(&nm_i->build_lock); 150955008d84SJaegeuk Kim build_free_nids(sbi); 151055008d84SJaegeuk Kim mutex_unlock(&nm_i->build_lock); 151155008d84SJaegeuk Kim goto retry; 151255008d84SJaegeuk Kim } 1513e05df3b1SJaegeuk Kim 15140a8165d7SJaegeuk Kim /* 1515e05df3b1SJaegeuk Kim * alloc_nid() should be called prior to this function. 1516e05df3b1SJaegeuk Kim */ 1517e05df3b1SJaegeuk Kim void alloc_nid_done(struct f2fs_sb_info *sbi, nid_t nid) 1518e05df3b1SJaegeuk Kim { 1519e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1520e05df3b1SJaegeuk Kim struct free_nid *i; 1521e05df3b1SJaegeuk Kim 1522e05df3b1SJaegeuk Kim spin_lock(&nm_i->free_nid_list_lock); 15238a7ed66aSJaegeuk Kim i = __lookup_free_nid_list(nm_i, nid); 15249850cf4aSJaegeuk Kim f2fs_bug_on(sbi, !i || i->state != NID_ALLOC); 15258a7ed66aSJaegeuk Kim __del_from_free_nid_list(nm_i, i); 1526e05df3b1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1527cf0ee0f0SChao Yu 1528cf0ee0f0SChao Yu kmem_cache_free(free_nid_slab, i); 1529e05df3b1SJaegeuk Kim } 1530e05df3b1SJaegeuk Kim 15310a8165d7SJaegeuk Kim /* 1532e05df3b1SJaegeuk Kim * alloc_nid() should be called prior to this function. 1533e05df3b1SJaegeuk Kim */ 1534e05df3b1SJaegeuk Kim void alloc_nid_failed(struct f2fs_sb_info *sbi, nid_t nid) 1535e05df3b1SJaegeuk Kim { 153649952fa1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 153749952fa1SJaegeuk Kim struct free_nid *i; 1538cf0ee0f0SChao Yu bool need_free = false; 153949952fa1SJaegeuk Kim 154065985d93SJaegeuk Kim if (!nid) 154165985d93SJaegeuk Kim return; 154265985d93SJaegeuk Kim 154349952fa1SJaegeuk Kim spin_lock(&nm_i->free_nid_list_lock); 15448a7ed66aSJaegeuk Kim i = __lookup_free_nid_list(nm_i, nid); 15459850cf4aSJaegeuk Kim f2fs_bug_on(sbi, !i || i->state != NID_ALLOC); 15466fb03f3aSJaegeuk Kim if (!available_free_memory(sbi, FREE_NIDS)) { 15478a7ed66aSJaegeuk Kim __del_from_free_nid_list(nm_i, i); 1548cf0ee0f0SChao Yu need_free = true; 154995630cbaSHaicheng Li } else { 155049952fa1SJaegeuk Kim i->state = NID_NEW; 155149952fa1SJaegeuk Kim nm_i->fcnt++; 155295630cbaSHaicheng Li } 155349952fa1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1554cf0ee0f0SChao Yu 1555cf0ee0f0SChao Yu if (need_free) 1556cf0ee0f0SChao Yu kmem_cache_free(free_nid_slab, i); 1557e05df3b1SJaegeuk Kim } 1558e05df3b1SJaegeuk Kim 155970cfed88SChao Yu void recover_inline_xattr(struct inode *inode, struct page *page) 156028cdce04SChao Yu { 156128cdce04SChao Yu void *src_addr, *dst_addr; 156228cdce04SChao Yu size_t inline_size; 156328cdce04SChao Yu struct page *ipage; 156428cdce04SChao Yu struct f2fs_inode *ri; 156528cdce04SChao Yu 15664081363fSJaegeuk Kim ipage = get_node_page(F2FS_I_SB(inode), inode->i_ino); 15679850cf4aSJaegeuk Kim f2fs_bug_on(F2FS_I_SB(inode), IS_ERR(ipage)); 156828cdce04SChao Yu 1569e3b4d43fSJaegeuk Kim ri = F2FS_INODE(page); 1570e3b4d43fSJaegeuk Kim if (!(ri->i_inline & F2FS_INLINE_XATTR)) { 1571e3b4d43fSJaegeuk Kim clear_inode_flag(F2FS_I(inode), FI_INLINE_XATTR); 1572e3b4d43fSJaegeuk Kim goto update_inode; 1573e3b4d43fSJaegeuk Kim } 1574e3b4d43fSJaegeuk Kim 157528cdce04SChao Yu dst_addr = inline_xattr_addr(ipage); 157628cdce04SChao Yu src_addr = inline_xattr_addr(page); 157728cdce04SChao Yu inline_size = inline_xattr_size(inode); 157828cdce04SChao Yu 157954b591dfSJaegeuk Kim f2fs_wait_on_page_writeback(ipage, NODE); 158028cdce04SChao Yu memcpy(dst_addr, src_addr, inline_size); 1581e3b4d43fSJaegeuk Kim update_inode: 158228cdce04SChao Yu update_inode(inode, ipage); 158328cdce04SChao Yu f2fs_put_page(ipage, 1); 158428cdce04SChao Yu } 158528cdce04SChao Yu 15861c35a90eSJaegeuk Kim void recover_xattr_data(struct inode *inode, struct page *page, block_t blkaddr) 1587abb2366cSJaegeuk Kim { 15884081363fSJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 1589abb2366cSJaegeuk Kim nid_t prev_xnid = F2FS_I(inode)->i_xattr_nid; 1590abb2366cSJaegeuk Kim nid_t new_xnid = nid_of_node(page); 1591abb2366cSJaegeuk Kim struct node_info ni; 1592abb2366cSJaegeuk Kim 1593abb2366cSJaegeuk Kim /* 1: invalidate the previous xattr nid */ 1594abb2366cSJaegeuk Kim if (!prev_xnid) 1595abb2366cSJaegeuk Kim goto recover_xnid; 1596abb2366cSJaegeuk Kim 1597abb2366cSJaegeuk Kim /* Deallocate node address */ 1598abb2366cSJaegeuk Kim get_node_info(sbi, prev_xnid, &ni); 15999850cf4aSJaegeuk Kim f2fs_bug_on(sbi, ni.blk_addr == NULL_ADDR); 1600abb2366cSJaegeuk Kim invalidate_blocks(sbi, ni.blk_addr); 1601abb2366cSJaegeuk Kim dec_valid_node_count(sbi, inode); 1602479f40c4SJaegeuk Kim set_node_addr(sbi, &ni, NULL_ADDR, false); 1603abb2366cSJaegeuk Kim 1604abb2366cSJaegeuk Kim recover_xnid: 1605abb2366cSJaegeuk Kim /* 2: allocate new xattr nid */ 1606abb2366cSJaegeuk Kim if (unlikely(!inc_valid_node_count(sbi, inode))) 16079850cf4aSJaegeuk Kim f2fs_bug_on(sbi, 1); 1608abb2366cSJaegeuk Kim 1609abb2366cSJaegeuk Kim remove_free_nid(NM_I(sbi), new_xnid); 1610abb2366cSJaegeuk Kim get_node_info(sbi, new_xnid, &ni); 1611abb2366cSJaegeuk Kim ni.ino = inode->i_ino; 1612479f40c4SJaegeuk Kim set_node_addr(sbi, &ni, NEW_ADDR, false); 1613abb2366cSJaegeuk Kim F2FS_I(inode)->i_xattr_nid = new_xnid; 1614abb2366cSJaegeuk Kim 1615abb2366cSJaegeuk Kim /* 3: update xattr blkaddr */ 1616abb2366cSJaegeuk Kim refresh_sit_entry(sbi, NEW_ADDR, blkaddr); 1617479f40c4SJaegeuk Kim set_node_addr(sbi, &ni, blkaddr, false); 1618abb2366cSJaegeuk Kim 1619abb2366cSJaegeuk Kim update_inode_page(inode); 1620abb2366cSJaegeuk Kim } 1621abb2366cSJaegeuk Kim 1622e05df3b1SJaegeuk Kim int recover_inode_page(struct f2fs_sb_info *sbi, struct page *page) 1623e05df3b1SJaegeuk Kim { 162458bfaf44SJaegeuk Kim struct f2fs_inode *src, *dst; 1625e05df3b1SJaegeuk Kim nid_t ino = ino_of_node(page); 1626e05df3b1SJaegeuk Kim struct node_info old_ni, new_ni; 1627e05df3b1SJaegeuk Kim struct page *ipage; 1628e05df3b1SJaegeuk Kim 1629e8271fa3SJaegeuk Kim get_node_info(sbi, ino, &old_ni); 1630e8271fa3SJaegeuk Kim 1631e8271fa3SJaegeuk Kim if (unlikely(old_ni.blk_addr != NULL_ADDR)) 1632e8271fa3SJaegeuk Kim return -EINVAL; 1633e8271fa3SJaegeuk Kim 16344ef51a8fSJaegeuk Kim ipage = grab_cache_page(NODE_MAPPING(sbi), ino); 1635e05df3b1SJaegeuk Kim if (!ipage) 1636e05df3b1SJaegeuk Kim return -ENOMEM; 1637e05df3b1SJaegeuk Kim 1638e05df3b1SJaegeuk Kim /* Should not use this inode from free nid list */ 1639e05df3b1SJaegeuk Kim remove_free_nid(NM_I(sbi), ino); 1640e05df3b1SJaegeuk Kim 1641e05df3b1SJaegeuk Kim SetPageUptodate(ipage); 1642e05df3b1SJaegeuk Kim fill_node_footer(ipage, ino, ino, 0, true); 1643e05df3b1SJaegeuk Kim 164458bfaf44SJaegeuk Kim src = F2FS_INODE(page); 164558bfaf44SJaegeuk Kim dst = F2FS_INODE(ipage); 1646e05df3b1SJaegeuk Kim 164758bfaf44SJaegeuk Kim memcpy(dst, src, (unsigned long)&src->i_ext - (unsigned long)src); 164858bfaf44SJaegeuk Kim dst->i_size = 0; 164958bfaf44SJaegeuk Kim dst->i_blocks = cpu_to_le64(1); 165058bfaf44SJaegeuk Kim dst->i_links = cpu_to_le32(1); 165158bfaf44SJaegeuk Kim dst->i_xattr_nid = 0; 1652617deb8cSJaegeuk Kim dst->i_inline = src->i_inline & F2FS_INLINE_XATTR; 1653e05df3b1SJaegeuk Kim 1654e05df3b1SJaegeuk Kim new_ni = old_ni; 1655e05df3b1SJaegeuk Kim new_ni.ino = ino; 1656e05df3b1SJaegeuk Kim 1657cfb271d4SChao Yu if (unlikely(!inc_valid_node_count(sbi, NULL))) 165865e5cd0aSJaegeuk Kim WARN_ON(1); 1659479f40c4SJaegeuk Kim set_node_addr(sbi, &new_ni, NEW_ADDR, false); 1660e05df3b1SJaegeuk Kim inc_valid_inode_count(sbi); 1661617deb8cSJaegeuk Kim set_page_dirty(ipage); 1662e05df3b1SJaegeuk Kim f2fs_put_page(ipage, 1); 1663e05df3b1SJaegeuk Kim return 0; 1664e05df3b1SJaegeuk Kim } 1665e05df3b1SJaegeuk Kim 16669af0ff1cSChao Yu /* 16679af0ff1cSChao Yu * ra_sum_pages() merge contiguous pages into one bio and submit. 1668e1c42045Sarter97 * these pre-read pages are allocated in bd_inode's mapping tree. 16699af0ff1cSChao Yu */ 1670bac4eef6SChao Yu static int ra_sum_pages(struct f2fs_sb_info *sbi, struct page **pages, 16719af0ff1cSChao Yu int start, int nrpages) 16729af0ff1cSChao Yu { 1673bac4eef6SChao Yu struct inode *inode = sbi->sb->s_bdev->bd_inode; 1674bac4eef6SChao Yu struct address_space *mapping = inode->i_mapping; 1675bac4eef6SChao Yu int i, page_idx = start; 1676458e6197SJaegeuk Kim struct f2fs_io_info fio = { 1677458e6197SJaegeuk Kim .type = META, 16787e8f2308SGu Zheng .rw = READ_SYNC | REQ_META | REQ_PRIO 1679458e6197SJaegeuk Kim }; 16809af0ff1cSChao Yu 1681bac4eef6SChao Yu for (i = 0; page_idx < start + nrpages; page_idx++, i++) { 1682bac4eef6SChao Yu /* alloc page in bd_inode for reading node summary info */ 1683bac4eef6SChao Yu pages[i] = grab_cache_page(mapping, page_idx); 1684bac4eef6SChao Yu if (!pages[i]) 1685d653788aSGu Zheng break; 1686bac4eef6SChao Yu f2fs_submit_page_mbio(sbi, pages[i], page_idx, &fio); 16879af0ff1cSChao Yu } 16889af0ff1cSChao Yu 1689458e6197SJaegeuk Kim f2fs_submit_merged_bio(sbi, META, READ); 1690bac4eef6SChao Yu return i; 16919af0ff1cSChao Yu } 16929af0ff1cSChao Yu 1693e05df3b1SJaegeuk Kim int restore_node_summary(struct f2fs_sb_info *sbi, 1694e05df3b1SJaegeuk Kim unsigned int segno, struct f2fs_summary_block *sum) 1695e05df3b1SJaegeuk Kim { 1696e05df3b1SJaegeuk Kim struct f2fs_node *rn; 1697e05df3b1SJaegeuk Kim struct f2fs_summary *sum_entry; 1698bac4eef6SChao Yu struct inode *inode = sbi->sb->s_bdev->bd_inode; 1699e05df3b1SJaegeuk Kim block_t addr; 17009af0ff1cSChao Yu int bio_blocks = MAX_BIO_BLOCKS(max_hw_blocks(sbi)); 1701bac4eef6SChao Yu struct page *pages[bio_blocks]; 1702bac4eef6SChao Yu int i, idx, last_offset, nrpages, err = 0; 1703e05df3b1SJaegeuk Kim 1704e05df3b1SJaegeuk Kim /* scan the node segment */ 1705e05df3b1SJaegeuk Kim last_offset = sbi->blocks_per_seg; 1706e05df3b1SJaegeuk Kim addr = START_BLOCK(sbi, segno); 1707e05df3b1SJaegeuk Kim sum_entry = &sum->entries[0]; 1708e05df3b1SJaegeuk Kim 1709d653788aSGu Zheng for (i = 0; !err && i < last_offset; i += nrpages, addr += nrpages) { 17109af0ff1cSChao Yu nrpages = min(last_offset - i, bio_blocks); 1711393ff91fSJaegeuk Kim 17129af0ff1cSChao Yu /* readahead node pages */ 1713bac4eef6SChao Yu nrpages = ra_sum_pages(sbi, pages, addr, nrpages); 1714d653788aSGu Zheng if (!nrpages) 1715d653788aSGu Zheng return -ENOMEM; 17169af0ff1cSChao Yu 1717bac4eef6SChao Yu for (idx = 0; idx < nrpages; idx++) { 1718d653788aSGu Zheng if (err) 1719d653788aSGu Zheng goto skip; 1720393ff91fSJaegeuk Kim 1721bac4eef6SChao Yu lock_page(pages[idx]); 1722bac4eef6SChao Yu if (unlikely(!PageUptodate(pages[idx]))) { 17236bacf52fSJaegeuk Kim err = -EIO; 17246bacf52fSJaegeuk Kim } else { 1725bac4eef6SChao Yu rn = F2FS_NODE(pages[idx]); 1726393ff91fSJaegeuk Kim sum_entry->nid = rn->footer.nid; 1727393ff91fSJaegeuk Kim sum_entry->version = 0; 1728393ff91fSJaegeuk Kim sum_entry->ofs_in_node = 0; 17299af0ff1cSChao Yu sum_entry++; 1730e05df3b1SJaegeuk Kim } 1731bac4eef6SChao Yu unlock_page(pages[idx]); 1732d653788aSGu Zheng skip: 1733bac4eef6SChao Yu page_cache_release(pages[idx]); 17349af0ff1cSChao Yu } 1735bac4eef6SChao Yu 1736bac4eef6SChao Yu invalidate_mapping_pages(inode->i_mapping, addr, 1737bac4eef6SChao Yu addr + nrpages); 17389af0ff1cSChao Yu } 17399af0ff1cSChao Yu return err; 1740e05df3b1SJaegeuk Kim } 1741e05df3b1SJaegeuk Kim 1742aec71382SChao Yu static struct nat_entry_set *grab_nat_entry_set(void) 1743aec71382SChao Yu { 1744aec71382SChao Yu struct nat_entry_set *nes = 1745aec71382SChao Yu f2fs_kmem_cache_alloc(nat_entry_set_slab, GFP_ATOMIC); 1746aec71382SChao Yu 1747aec71382SChao Yu nes->entry_cnt = 0; 1748aec71382SChao Yu INIT_LIST_HEAD(&nes->set_list); 1749aec71382SChao Yu INIT_LIST_HEAD(&nes->entry_list); 1750aec71382SChao Yu return nes; 1751aec71382SChao Yu } 1752aec71382SChao Yu 1753aec71382SChao Yu static void release_nat_entry_set(struct nat_entry_set *nes, 1754aec71382SChao Yu struct f2fs_nm_info *nm_i) 1755aec71382SChao Yu { 1756aec71382SChao Yu nm_i->dirty_nat_cnt -= nes->entry_cnt; 1757aec71382SChao Yu list_del(&nes->set_list); 1758aec71382SChao Yu kmem_cache_free(nat_entry_set_slab, nes); 1759aec71382SChao Yu } 1760aec71382SChao Yu 1761aec71382SChao Yu static void adjust_nat_entry_set(struct nat_entry_set *nes, 1762aec71382SChao Yu struct list_head *head) 1763aec71382SChao Yu { 1764aec71382SChao Yu struct nat_entry_set *next = nes; 1765aec71382SChao Yu 1766aec71382SChao Yu if (list_is_last(&nes->set_list, head)) 1767aec71382SChao Yu return; 1768aec71382SChao Yu 1769aec71382SChao Yu list_for_each_entry_continue(next, head, set_list) 1770aec71382SChao Yu if (nes->entry_cnt <= next->entry_cnt) 1771aec71382SChao Yu break; 1772aec71382SChao Yu 1773aec71382SChao Yu list_move_tail(&nes->set_list, &next->set_list); 1774aec71382SChao Yu } 1775aec71382SChao Yu 1776aec71382SChao Yu static void add_nat_entry(struct nat_entry *ne, struct list_head *head) 1777aec71382SChao Yu { 1778aec71382SChao Yu struct nat_entry_set *nes; 1779aec71382SChao Yu nid_t start_nid = START_NID(ne->ni.nid); 1780aec71382SChao Yu 1781aec71382SChao Yu list_for_each_entry(nes, head, set_list) { 1782aec71382SChao Yu if (nes->start_nid == start_nid) { 1783aec71382SChao Yu list_move_tail(&ne->list, &nes->entry_list); 1784aec71382SChao Yu nes->entry_cnt++; 1785aec71382SChao Yu adjust_nat_entry_set(nes, head); 1786aec71382SChao Yu return; 1787aec71382SChao Yu } 1788aec71382SChao Yu } 1789aec71382SChao Yu 1790aec71382SChao Yu nes = grab_nat_entry_set(); 1791aec71382SChao Yu 1792aec71382SChao Yu nes->start_nid = start_nid; 1793aec71382SChao Yu list_move_tail(&ne->list, &nes->entry_list); 1794aec71382SChao Yu nes->entry_cnt++; 1795aec71382SChao Yu list_add(&nes->set_list, head); 1796aec71382SChao Yu } 1797aec71382SChao Yu 1798aec71382SChao Yu static void merge_nats_in_set(struct f2fs_sb_info *sbi) 1799aec71382SChao Yu { 1800aec71382SChao Yu struct f2fs_nm_info *nm_i = NM_I(sbi); 1801aec71382SChao Yu struct list_head *dirty_list = &nm_i->dirty_nat_entries; 1802aec71382SChao Yu struct list_head *set_list = &nm_i->nat_entry_set; 1803aec71382SChao Yu struct nat_entry *ne, *tmp; 1804aec71382SChao Yu 1805aec71382SChao Yu write_lock(&nm_i->nat_tree_lock); 1806aec71382SChao Yu list_for_each_entry_safe(ne, tmp, dirty_list, list) { 1807aec71382SChao Yu if (nat_get_blkaddr(ne) == NEW_ADDR) 1808aec71382SChao Yu continue; 1809aec71382SChao Yu add_nat_entry(ne, set_list); 1810aec71382SChao Yu nm_i->dirty_nat_cnt++; 1811aec71382SChao Yu } 1812aec71382SChao Yu write_unlock(&nm_i->nat_tree_lock); 1813aec71382SChao Yu } 1814aec71382SChao Yu 1815aec71382SChao Yu static void remove_nats_in_journal(struct f2fs_sb_info *sbi) 1816e05df3b1SJaegeuk Kim { 1817e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1818e05df3b1SJaegeuk Kim struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); 1819e05df3b1SJaegeuk Kim struct f2fs_summary_block *sum = curseg->sum_blk; 1820e05df3b1SJaegeuk Kim int i; 1821e05df3b1SJaegeuk Kim 1822e05df3b1SJaegeuk Kim mutex_lock(&curseg->curseg_mutex); 1823e05df3b1SJaegeuk Kim for (i = 0; i < nats_in_cursum(sum); i++) { 1824e05df3b1SJaegeuk Kim struct nat_entry *ne; 1825e05df3b1SJaegeuk Kim struct f2fs_nat_entry raw_ne; 1826e05df3b1SJaegeuk Kim nid_t nid = le32_to_cpu(nid_in_journal(sum, i)); 1827e05df3b1SJaegeuk Kim 1828e05df3b1SJaegeuk Kim raw_ne = nat_in_journal(sum, i); 1829e05df3b1SJaegeuk Kim retry: 1830e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 1831e05df3b1SJaegeuk Kim ne = __lookup_nat_cache(nm_i, nid); 1832aec71382SChao Yu if (ne) 1833aec71382SChao Yu goto found; 1834aec71382SChao Yu 1835e05df3b1SJaegeuk Kim ne = grab_nat_entry(nm_i, nid); 1836e05df3b1SJaegeuk Kim if (!ne) { 1837e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 1838e05df3b1SJaegeuk Kim goto retry; 1839e05df3b1SJaegeuk Kim } 184094dac22eSChao Yu node_info_from_raw_nat(&ne->ni, &raw_ne); 1841aec71382SChao Yu found: 1842e05df3b1SJaegeuk Kim __set_nat_cache_dirty(nm_i, ne); 1843e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 1844e05df3b1SJaegeuk Kim } 1845e05df3b1SJaegeuk Kim update_nats_in_cursum(sum, -i); 1846e05df3b1SJaegeuk Kim mutex_unlock(&curseg->curseg_mutex); 1847e05df3b1SJaegeuk Kim } 1848e05df3b1SJaegeuk Kim 18490a8165d7SJaegeuk Kim /* 1850e05df3b1SJaegeuk Kim * This function is called during the checkpointing process. 1851e05df3b1SJaegeuk Kim */ 1852e05df3b1SJaegeuk Kim void flush_nat_entries(struct f2fs_sb_info *sbi) 1853e05df3b1SJaegeuk Kim { 1854e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1855e05df3b1SJaegeuk Kim struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); 1856e05df3b1SJaegeuk Kim struct f2fs_summary_block *sum = curseg->sum_blk; 1857aec71382SChao Yu struct nat_entry_set *nes, *tmp; 1858aec71382SChao Yu struct list_head *head = &nm_i->nat_entry_set; 1859aec71382SChao Yu bool to_journal = true; 1860e05df3b1SJaegeuk Kim 1861aec71382SChao Yu /* merge nat entries of dirty list to nat entry set temporarily */ 1862aec71382SChao Yu merge_nats_in_set(sbi); 1863e05df3b1SJaegeuk Kim 1864e05df3b1SJaegeuk Kim /* 1865aec71382SChao Yu * if there are no enough space in journal to store dirty nat 1866aec71382SChao Yu * entries, remove all entries from journal and merge them 1867aec71382SChao Yu * into nat entry set. 1868e05df3b1SJaegeuk Kim */ 1869184a5cd2SChao Yu if (!__has_cursum_space(sum, nm_i->dirty_nat_cnt, NAT_JOURNAL)) { 1870aec71382SChao Yu remove_nats_in_journal(sbi); 1871aec71382SChao Yu 1872aec71382SChao Yu /* 1873aec71382SChao Yu * merge nat entries of dirty list to nat entry set temporarily 1874aec71382SChao Yu */ 1875aec71382SChao Yu merge_nats_in_set(sbi); 1876aec71382SChao Yu } 1877aec71382SChao Yu 1878aec71382SChao Yu if (!nm_i->dirty_nat_cnt) 1879aec71382SChao Yu return; 1880aec71382SChao Yu 1881aec71382SChao Yu /* 1882aec71382SChao Yu * there are two steps to flush nat entries: 1883aec71382SChao Yu * #1, flush nat entries to journal in current hot data summary block. 1884aec71382SChao Yu * #2, flush nat entries to nat page. 1885aec71382SChao Yu */ 1886aec71382SChao Yu list_for_each_entry_safe(nes, tmp, head, set_list) { 1887aec71382SChao Yu struct f2fs_nat_block *nat_blk; 1888aec71382SChao Yu struct nat_entry *ne, *cur; 1889aec71382SChao Yu struct page *page; 1890aec71382SChao Yu nid_t start_nid = nes->start_nid; 1891aec71382SChao Yu 1892184a5cd2SChao Yu if (to_journal && 1893184a5cd2SChao Yu !__has_cursum_space(sum, nes->entry_cnt, NAT_JOURNAL)) 1894aec71382SChao Yu to_journal = false; 1895aec71382SChao Yu 1896aec71382SChao Yu if (to_journal) { 1897aec71382SChao Yu mutex_lock(&curseg->curseg_mutex); 1898aec71382SChao Yu } else { 1899e05df3b1SJaegeuk Kim page = get_next_nat_page(sbi, start_nid); 1900e05df3b1SJaegeuk Kim nat_blk = page_address(page); 19019850cf4aSJaegeuk Kim f2fs_bug_on(sbi, !nat_blk); 1902e05df3b1SJaegeuk Kim } 1903e05df3b1SJaegeuk Kim 1904aec71382SChao Yu /* flush dirty nats in nat entry set */ 1905aec71382SChao Yu list_for_each_entry_safe(ne, cur, &nes->entry_list, list) { 1906aec71382SChao Yu struct f2fs_nat_entry *raw_ne; 1907aec71382SChao Yu nid_t nid = nat_get_nid(ne); 1908aec71382SChao Yu int offset; 1909aec71382SChao Yu 1910aec71382SChao Yu if (to_journal) { 1911aec71382SChao Yu offset = lookup_journal_in_cursum(sum, 1912aec71382SChao Yu NAT_JOURNAL, nid, 1); 19139850cf4aSJaegeuk Kim f2fs_bug_on(sbi, offset < 0); 1914aec71382SChao Yu raw_ne = &nat_in_journal(sum, offset); 1915aec71382SChao Yu nid_in_journal(sum, offset) = cpu_to_le32(nid); 1916aec71382SChao Yu } else { 1917aec71382SChao Yu raw_ne = &nat_blk->entries[nid - start_nid]; 1918aec71382SChao Yu } 1919aec71382SChao Yu raw_nat_from_node_info(raw_ne, &ne->ni); 1920aec71382SChao Yu 1921fa372417SJaegeuk Kim if (nat_get_blkaddr(ne) == NULL_ADDR && 19226fb03f3aSJaegeuk Kim add_free_nid(sbi, nid, false) <= 0) { 1923e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 1924e05df3b1SJaegeuk Kim __del_from_nat_cache(nm_i, ne); 1925e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 1926e05df3b1SJaegeuk Kim } else { 1927e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 192888bd02c9SJaegeuk Kim nat_reset_flag(ne); 1929e05df3b1SJaegeuk Kim __clear_nat_cache_dirty(nm_i, ne); 1930e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 1931e05df3b1SJaegeuk Kim } 1932e05df3b1SJaegeuk Kim } 1933aec71382SChao Yu 1934aec71382SChao Yu if (to_journal) 1935e05df3b1SJaegeuk Kim mutex_unlock(&curseg->curseg_mutex); 1936aec71382SChao Yu else 1937e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 1938aec71382SChao Yu 19399850cf4aSJaegeuk Kim f2fs_bug_on(sbi, !list_empty(&nes->entry_list)); 1940aec71382SChao Yu release_nat_entry_set(nes, nm_i); 1941aec71382SChao Yu } 1942aec71382SChao Yu 19439850cf4aSJaegeuk Kim f2fs_bug_on(sbi, !list_empty(head)); 19449850cf4aSJaegeuk Kim f2fs_bug_on(sbi, nm_i->dirty_nat_cnt); 1945e05df3b1SJaegeuk Kim } 1946e05df3b1SJaegeuk Kim 1947e05df3b1SJaegeuk Kim static int init_node_manager(struct f2fs_sb_info *sbi) 1948e05df3b1SJaegeuk Kim { 1949e05df3b1SJaegeuk Kim struct f2fs_super_block *sb_raw = F2FS_RAW_SUPER(sbi); 1950e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1951e05df3b1SJaegeuk Kim unsigned char *version_bitmap; 1952e05df3b1SJaegeuk Kim unsigned int nat_segs, nat_blocks; 1953e05df3b1SJaegeuk Kim 1954e05df3b1SJaegeuk Kim nm_i->nat_blkaddr = le32_to_cpu(sb_raw->nat_blkaddr); 1955e05df3b1SJaegeuk Kim 1956e05df3b1SJaegeuk Kim /* segment_count_nat includes pair segment so divide to 2. */ 1957e05df3b1SJaegeuk Kim nat_segs = le32_to_cpu(sb_raw->segment_count_nat) >> 1; 1958e05df3b1SJaegeuk Kim nat_blocks = nat_segs << le32_to_cpu(sb_raw->log_blocks_per_seg); 1959b63da15eSJaegeuk Kim 19607ee0eeabSJaegeuk Kim nm_i->max_nid = NAT_ENTRY_PER_BLOCK * nat_blocks; 19617ee0eeabSJaegeuk Kim 1962b63da15eSJaegeuk Kim /* not used nids: 0, node, meta, (and root counted as valid node) */ 1963c200b1aaSChao Yu nm_i->available_nids = nm_i->max_nid - F2FS_RESERVED_NODE_NUM; 1964e05df3b1SJaegeuk Kim nm_i->fcnt = 0; 1965e05df3b1SJaegeuk Kim nm_i->nat_cnt = 0; 1966cdfc41c1SJaegeuk Kim nm_i->ram_thresh = DEF_RAM_THRESHOLD; 1967e05df3b1SJaegeuk Kim 19688a7ed66aSJaegeuk Kim INIT_RADIX_TREE(&nm_i->free_nid_root, GFP_ATOMIC); 1969e05df3b1SJaegeuk Kim INIT_LIST_HEAD(&nm_i->free_nid_list); 1970e05df3b1SJaegeuk Kim INIT_RADIX_TREE(&nm_i->nat_root, GFP_ATOMIC); 1971e05df3b1SJaegeuk Kim INIT_LIST_HEAD(&nm_i->nat_entries); 1972e05df3b1SJaegeuk Kim INIT_LIST_HEAD(&nm_i->dirty_nat_entries); 1973aec71382SChao Yu INIT_LIST_HEAD(&nm_i->nat_entry_set); 1974e05df3b1SJaegeuk Kim 1975e05df3b1SJaegeuk Kim mutex_init(&nm_i->build_lock); 1976e05df3b1SJaegeuk Kim spin_lock_init(&nm_i->free_nid_list_lock); 1977e05df3b1SJaegeuk Kim rwlock_init(&nm_i->nat_tree_lock); 1978e05df3b1SJaegeuk Kim 1979e05df3b1SJaegeuk Kim nm_i->next_scan_nid = le32_to_cpu(sbi->ckpt->next_free_nid); 198079b5793bSAlexandru Gheorghiu nm_i->bitmap_size = __bitmap_size(sbi, NAT_BITMAP); 1981e05df3b1SJaegeuk Kim version_bitmap = __bitmap_ptr(sbi, NAT_BITMAP); 1982e05df3b1SJaegeuk Kim if (!version_bitmap) 1983e05df3b1SJaegeuk Kim return -EFAULT; 1984e05df3b1SJaegeuk Kim 198579b5793bSAlexandru Gheorghiu nm_i->nat_bitmap = kmemdup(version_bitmap, nm_i->bitmap_size, 198679b5793bSAlexandru Gheorghiu GFP_KERNEL); 198779b5793bSAlexandru Gheorghiu if (!nm_i->nat_bitmap) 198879b5793bSAlexandru Gheorghiu return -ENOMEM; 1989e05df3b1SJaegeuk Kim return 0; 1990e05df3b1SJaegeuk Kim } 1991e05df3b1SJaegeuk Kim 1992e05df3b1SJaegeuk Kim int build_node_manager(struct f2fs_sb_info *sbi) 1993e05df3b1SJaegeuk Kim { 1994e05df3b1SJaegeuk Kim int err; 1995e05df3b1SJaegeuk Kim 1996e05df3b1SJaegeuk Kim sbi->nm_info = kzalloc(sizeof(struct f2fs_nm_info), GFP_KERNEL); 1997e05df3b1SJaegeuk Kim if (!sbi->nm_info) 1998e05df3b1SJaegeuk Kim return -ENOMEM; 1999e05df3b1SJaegeuk Kim 2000e05df3b1SJaegeuk Kim err = init_node_manager(sbi); 2001e05df3b1SJaegeuk Kim if (err) 2002e05df3b1SJaegeuk Kim return err; 2003e05df3b1SJaegeuk Kim 2004e05df3b1SJaegeuk Kim build_free_nids(sbi); 2005e05df3b1SJaegeuk Kim return 0; 2006e05df3b1SJaegeuk Kim } 2007e05df3b1SJaegeuk Kim 2008e05df3b1SJaegeuk Kim void destroy_node_manager(struct f2fs_sb_info *sbi) 2009e05df3b1SJaegeuk Kim { 2010e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 2011e05df3b1SJaegeuk Kim struct free_nid *i, *next_i; 2012e05df3b1SJaegeuk Kim struct nat_entry *natvec[NATVEC_SIZE]; 2013e05df3b1SJaegeuk Kim nid_t nid = 0; 2014e05df3b1SJaegeuk Kim unsigned int found; 2015e05df3b1SJaegeuk Kim 2016e05df3b1SJaegeuk Kim if (!nm_i) 2017e05df3b1SJaegeuk Kim return; 2018e05df3b1SJaegeuk Kim 2019e05df3b1SJaegeuk Kim /* destroy free nid list */ 2020e05df3b1SJaegeuk Kim spin_lock(&nm_i->free_nid_list_lock); 2021e05df3b1SJaegeuk Kim list_for_each_entry_safe(i, next_i, &nm_i->free_nid_list, list) { 20229850cf4aSJaegeuk Kim f2fs_bug_on(sbi, i->state == NID_ALLOC); 20238a7ed66aSJaegeuk Kim __del_from_free_nid_list(nm_i, i); 2024e05df3b1SJaegeuk Kim nm_i->fcnt--; 2025cf0ee0f0SChao Yu spin_unlock(&nm_i->free_nid_list_lock); 2026cf0ee0f0SChao Yu kmem_cache_free(free_nid_slab, i); 2027cf0ee0f0SChao Yu spin_lock(&nm_i->free_nid_list_lock); 2028e05df3b1SJaegeuk Kim } 20299850cf4aSJaegeuk Kim f2fs_bug_on(sbi, nm_i->fcnt); 2030e05df3b1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 2031e05df3b1SJaegeuk Kim 2032e05df3b1SJaegeuk Kim /* destroy nat cache */ 2033e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 2034e05df3b1SJaegeuk Kim while ((found = __gang_lookup_nat_cache(nm_i, 2035e05df3b1SJaegeuk Kim nid, NATVEC_SIZE, natvec))) { 2036e05df3b1SJaegeuk Kim unsigned idx; 2037b6ce391eSGu Zheng nid = nat_get_nid(natvec[found - 1]) + 1; 2038b6ce391eSGu Zheng for (idx = 0; idx < found; idx++) 2039b6ce391eSGu Zheng __del_from_nat_cache(nm_i, natvec[idx]); 2040e05df3b1SJaegeuk Kim } 20419850cf4aSJaegeuk Kim f2fs_bug_on(sbi, nm_i->nat_cnt); 2042e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 2043e05df3b1SJaegeuk Kim 2044e05df3b1SJaegeuk Kim kfree(nm_i->nat_bitmap); 2045e05df3b1SJaegeuk Kim sbi->nm_info = NULL; 2046e05df3b1SJaegeuk Kim kfree(nm_i); 2047e05df3b1SJaegeuk Kim } 2048e05df3b1SJaegeuk Kim 20496e6093a8SNamjae Jeon int __init create_node_manager_caches(void) 2050e05df3b1SJaegeuk Kim { 2051e05df3b1SJaegeuk Kim nat_entry_slab = f2fs_kmem_cache_create("nat_entry", 2052e8512d2eSGu Zheng sizeof(struct nat_entry)); 2053e05df3b1SJaegeuk Kim if (!nat_entry_slab) 2054aec71382SChao Yu goto fail; 2055e05df3b1SJaegeuk Kim 2056e05df3b1SJaegeuk Kim free_nid_slab = f2fs_kmem_cache_create("free_nid", 2057e8512d2eSGu Zheng sizeof(struct free_nid)); 2058aec71382SChao Yu if (!free_nid_slab) 2059aec71382SChao Yu goto destory_nat_entry; 2060aec71382SChao Yu 2061aec71382SChao Yu nat_entry_set_slab = f2fs_kmem_cache_create("nat_entry_set", 2062aec71382SChao Yu sizeof(struct nat_entry_set)); 2063aec71382SChao Yu if (!nat_entry_set_slab) 2064aec71382SChao Yu goto destory_free_nid; 2065e05df3b1SJaegeuk Kim return 0; 2066aec71382SChao Yu 2067aec71382SChao Yu destory_free_nid: 2068aec71382SChao Yu kmem_cache_destroy(free_nid_slab); 2069aec71382SChao Yu destory_nat_entry: 2070aec71382SChao Yu kmem_cache_destroy(nat_entry_slab); 2071aec71382SChao Yu fail: 2072aec71382SChao Yu return -ENOMEM; 2073e05df3b1SJaegeuk Kim } 2074e05df3b1SJaegeuk Kim 2075e05df3b1SJaegeuk Kim void destroy_node_manager_caches(void) 2076e05df3b1SJaegeuk Kim { 2077aec71382SChao Yu kmem_cache_destroy(nat_entry_set_slab); 2078e05df3b1SJaegeuk Kim kmem_cache_destroy(free_nid_slab); 2079e05df3b1SJaegeuk Kim kmem_cache_destroy(nat_entry_slab); 2080e05df3b1SJaegeuk Kim } 2081