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 struct f2fs_sb_info *sbi = F2FS_SB(mapping->host->i_sb); 58e05df3b1SJaegeuk Kim unsigned int long flags; 59e05df3b1SJaegeuk Kim 60e05df3b1SJaegeuk Kim if (PageDirty(page)) { 61e05df3b1SJaegeuk Kim spin_lock_irqsave(&mapping->tree_lock, flags); 62e05df3b1SJaegeuk Kim radix_tree_tag_clear(&mapping->page_tree, 63e05df3b1SJaegeuk Kim page_index(page), 64e05df3b1SJaegeuk Kim PAGECACHE_TAG_DIRTY); 65e05df3b1SJaegeuk Kim spin_unlock_irqrestore(&mapping->tree_lock, flags); 66e05df3b1SJaegeuk Kim 67e05df3b1SJaegeuk Kim clear_page_dirty_for_io(page); 68e05df3b1SJaegeuk Kim dec_page_count(sbi, F2FS_DIRTY_NODES); 69e05df3b1SJaegeuk Kim } 70e05df3b1SJaegeuk Kim ClearPageUptodate(page); 71e05df3b1SJaegeuk Kim } 72e05df3b1SJaegeuk Kim 73e05df3b1SJaegeuk Kim static struct page *get_current_nat_page(struct f2fs_sb_info *sbi, nid_t nid) 74e05df3b1SJaegeuk Kim { 75e05df3b1SJaegeuk Kim pgoff_t index = current_nat_addr(sbi, nid); 76e05df3b1SJaegeuk Kim return get_meta_page(sbi, index); 77e05df3b1SJaegeuk Kim } 78e05df3b1SJaegeuk Kim 79e05df3b1SJaegeuk Kim static struct page *get_next_nat_page(struct f2fs_sb_info *sbi, nid_t nid) 80e05df3b1SJaegeuk Kim { 81e05df3b1SJaegeuk Kim struct page *src_page; 82e05df3b1SJaegeuk Kim struct page *dst_page; 83e05df3b1SJaegeuk Kim pgoff_t src_off; 84e05df3b1SJaegeuk Kim pgoff_t dst_off; 85e05df3b1SJaegeuk Kim void *src_addr; 86e05df3b1SJaegeuk Kim void *dst_addr; 87e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 88e05df3b1SJaegeuk Kim 89e05df3b1SJaegeuk Kim src_off = current_nat_addr(sbi, nid); 90e05df3b1SJaegeuk Kim dst_off = next_nat_addr(sbi, src_off); 91e05df3b1SJaegeuk Kim 92e05df3b1SJaegeuk Kim /* get current nat block page with lock */ 93e05df3b1SJaegeuk Kim src_page = get_meta_page(sbi, src_off); 94e05df3b1SJaegeuk Kim dst_page = grab_meta_page(sbi, dst_off); 95aec71382SChao Yu f2fs_bug_on(PageDirty(src_page)); 96e05df3b1SJaegeuk Kim 97e05df3b1SJaegeuk Kim src_addr = page_address(src_page); 98e05df3b1SJaegeuk Kim dst_addr = page_address(dst_page); 99e05df3b1SJaegeuk Kim memcpy(dst_addr, src_addr, PAGE_CACHE_SIZE); 100e05df3b1SJaegeuk Kim set_page_dirty(dst_page); 101e05df3b1SJaegeuk Kim f2fs_put_page(src_page, 1); 102e05df3b1SJaegeuk Kim 103e05df3b1SJaegeuk Kim set_to_next_nat(nm_i, nid); 104e05df3b1SJaegeuk Kim 105e05df3b1SJaegeuk Kim return dst_page; 106e05df3b1SJaegeuk Kim } 107e05df3b1SJaegeuk Kim 108e05df3b1SJaegeuk Kim static struct nat_entry *__lookup_nat_cache(struct f2fs_nm_info *nm_i, nid_t n) 109e05df3b1SJaegeuk Kim { 110e05df3b1SJaegeuk Kim return radix_tree_lookup(&nm_i->nat_root, n); 111e05df3b1SJaegeuk Kim } 112e05df3b1SJaegeuk Kim 113e05df3b1SJaegeuk Kim static unsigned int __gang_lookup_nat_cache(struct f2fs_nm_info *nm_i, 114e05df3b1SJaegeuk Kim nid_t start, unsigned int nr, struct nat_entry **ep) 115e05df3b1SJaegeuk Kim { 116e05df3b1SJaegeuk Kim return radix_tree_gang_lookup(&nm_i->nat_root, (void **)ep, start, nr); 117e05df3b1SJaegeuk Kim } 118e05df3b1SJaegeuk Kim 119e05df3b1SJaegeuk Kim static void __del_from_nat_cache(struct f2fs_nm_info *nm_i, struct nat_entry *e) 120e05df3b1SJaegeuk Kim { 121e05df3b1SJaegeuk Kim list_del(&e->list); 122e05df3b1SJaegeuk Kim radix_tree_delete(&nm_i->nat_root, nat_get_nid(e)); 123e05df3b1SJaegeuk Kim nm_i->nat_cnt--; 124e05df3b1SJaegeuk Kim kmem_cache_free(nat_entry_slab, e); 125e05df3b1SJaegeuk Kim } 126e05df3b1SJaegeuk Kim 127e05df3b1SJaegeuk Kim int is_checkpointed_node(struct f2fs_sb_info *sbi, nid_t nid) 128e05df3b1SJaegeuk Kim { 129e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 130e05df3b1SJaegeuk Kim struct nat_entry *e; 131e05df3b1SJaegeuk Kim int is_cp = 1; 132e05df3b1SJaegeuk Kim 133e05df3b1SJaegeuk Kim read_lock(&nm_i->nat_tree_lock); 134e05df3b1SJaegeuk Kim e = __lookup_nat_cache(nm_i, nid); 135e05df3b1SJaegeuk Kim if (e && !e->checkpointed) 136e05df3b1SJaegeuk Kim is_cp = 0; 137e05df3b1SJaegeuk Kim read_unlock(&nm_i->nat_tree_lock); 138e05df3b1SJaegeuk Kim return is_cp; 139e05df3b1SJaegeuk Kim } 140e05df3b1SJaegeuk Kim 141479f40c4SJaegeuk Kim bool fsync_mark_done(struct f2fs_sb_info *sbi, nid_t nid) 142479f40c4SJaegeuk Kim { 143479f40c4SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 144479f40c4SJaegeuk Kim struct nat_entry *e; 145479f40c4SJaegeuk Kim bool fsync_done = false; 146479f40c4SJaegeuk Kim 147479f40c4SJaegeuk Kim read_lock(&nm_i->nat_tree_lock); 148479f40c4SJaegeuk Kim e = __lookup_nat_cache(nm_i, nid); 149479f40c4SJaegeuk Kim if (e) 150479f40c4SJaegeuk Kim fsync_done = e->fsync_done; 151479f40c4SJaegeuk Kim read_unlock(&nm_i->nat_tree_lock); 152479f40c4SJaegeuk Kim return fsync_done; 153479f40c4SJaegeuk Kim } 154479f40c4SJaegeuk Kim 155b6fe5873SJaegeuk Kim void fsync_mark_clear(struct f2fs_sb_info *sbi, nid_t nid) 156b6fe5873SJaegeuk Kim { 157b6fe5873SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 158b6fe5873SJaegeuk Kim struct nat_entry *e; 159b6fe5873SJaegeuk Kim 160b6fe5873SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 161b6fe5873SJaegeuk Kim e = __lookup_nat_cache(nm_i, nid); 162b6fe5873SJaegeuk Kim if (e) 163b6fe5873SJaegeuk Kim e->fsync_done = false; 164b6fe5873SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 165b6fe5873SJaegeuk Kim } 166b6fe5873SJaegeuk Kim 167e05df3b1SJaegeuk Kim static struct nat_entry *grab_nat_entry(struct f2fs_nm_info *nm_i, nid_t nid) 168e05df3b1SJaegeuk Kim { 169e05df3b1SJaegeuk Kim struct nat_entry *new; 170e05df3b1SJaegeuk Kim 171e05df3b1SJaegeuk Kim new = kmem_cache_alloc(nat_entry_slab, GFP_ATOMIC); 172e05df3b1SJaegeuk Kim if (!new) 173e05df3b1SJaegeuk Kim return NULL; 174e05df3b1SJaegeuk Kim if (radix_tree_insert(&nm_i->nat_root, nid, new)) { 175e05df3b1SJaegeuk Kim kmem_cache_free(nat_entry_slab, new); 176e05df3b1SJaegeuk Kim return NULL; 177e05df3b1SJaegeuk Kim } 178e05df3b1SJaegeuk Kim memset(new, 0, sizeof(struct nat_entry)); 179e05df3b1SJaegeuk Kim nat_set_nid(new, nid); 180fffc2a00SJaegeuk Kim new->checkpointed = true; 181e05df3b1SJaegeuk Kim list_add_tail(&new->list, &nm_i->nat_entries); 182e05df3b1SJaegeuk Kim nm_i->nat_cnt++; 183e05df3b1SJaegeuk Kim return new; 184e05df3b1SJaegeuk Kim } 185e05df3b1SJaegeuk Kim 186e05df3b1SJaegeuk Kim static void cache_nat_entry(struct f2fs_nm_info *nm_i, nid_t nid, 187e05df3b1SJaegeuk Kim struct f2fs_nat_entry *ne) 188e05df3b1SJaegeuk Kim { 189e05df3b1SJaegeuk Kim struct nat_entry *e; 190e05df3b1SJaegeuk Kim retry: 191e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 192e05df3b1SJaegeuk Kim e = __lookup_nat_cache(nm_i, nid); 193e05df3b1SJaegeuk Kim if (!e) { 194e05df3b1SJaegeuk Kim e = grab_nat_entry(nm_i, nid); 195e05df3b1SJaegeuk Kim if (!e) { 196e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 197e05df3b1SJaegeuk Kim goto retry; 198e05df3b1SJaegeuk Kim } 19994dac22eSChao Yu node_info_from_raw_nat(&e->ni, ne); 200e05df3b1SJaegeuk Kim } 201e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 202e05df3b1SJaegeuk Kim } 203e05df3b1SJaegeuk Kim 204e05df3b1SJaegeuk Kim static void set_node_addr(struct f2fs_sb_info *sbi, struct node_info *ni, 205479f40c4SJaegeuk Kim block_t new_blkaddr, bool fsync_done) 206e05df3b1SJaegeuk Kim { 207e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 208e05df3b1SJaegeuk Kim struct nat_entry *e; 209e05df3b1SJaegeuk Kim retry: 210e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 211e05df3b1SJaegeuk Kim e = __lookup_nat_cache(nm_i, ni->nid); 212e05df3b1SJaegeuk Kim if (!e) { 213e05df3b1SJaegeuk Kim e = grab_nat_entry(nm_i, ni->nid); 214e05df3b1SJaegeuk Kim if (!e) { 215e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 216e05df3b1SJaegeuk Kim goto retry; 217e05df3b1SJaegeuk Kim } 218e05df3b1SJaegeuk Kim e->ni = *ni; 2195d56b671SJaegeuk Kim f2fs_bug_on(ni->blk_addr == NEW_ADDR); 220e05df3b1SJaegeuk Kim } else if (new_blkaddr == NEW_ADDR) { 221e05df3b1SJaegeuk Kim /* 222e05df3b1SJaegeuk Kim * when nid is reallocated, 223e05df3b1SJaegeuk Kim * previous nat entry can be remained in nat cache. 224e05df3b1SJaegeuk Kim * So, reinitialize it with new information. 225e05df3b1SJaegeuk Kim */ 226e05df3b1SJaegeuk Kim e->ni = *ni; 2275d56b671SJaegeuk Kim f2fs_bug_on(ni->blk_addr != NULL_ADDR); 228e05df3b1SJaegeuk Kim } 229e05df3b1SJaegeuk Kim 230e05df3b1SJaegeuk Kim /* sanity check */ 2315d56b671SJaegeuk Kim f2fs_bug_on(nat_get_blkaddr(e) != ni->blk_addr); 2325d56b671SJaegeuk Kim f2fs_bug_on(nat_get_blkaddr(e) == NULL_ADDR && 233e05df3b1SJaegeuk Kim new_blkaddr == NULL_ADDR); 2345d56b671SJaegeuk Kim f2fs_bug_on(nat_get_blkaddr(e) == NEW_ADDR && 235e05df3b1SJaegeuk Kim new_blkaddr == NEW_ADDR); 2365d56b671SJaegeuk Kim f2fs_bug_on(nat_get_blkaddr(e) != NEW_ADDR && 237e05df3b1SJaegeuk Kim nat_get_blkaddr(e) != NULL_ADDR && 238e05df3b1SJaegeuk Kim new_blkaddr == NEW_ADDR); 239e05df3b1SJaegeuk Kim 240e1c42045Sarter97 /* increment version no as node is removed */ 241e05df3b1SJaegeuk Kim if (nat_get_blkaddr(e) != NEW_ADDR && new_blkaddr == NULL_ADDR) { 242e05df3b1SJaegeuk Kim unsigned char version = nat_get_version(e); 243e05df3b1SJaegeuk Kim nat_set_version(e, inc_node_version(version)); 244e05df3b1SJaegeuk Kim } 245e05df3b1SJaegeuk Kim 246e05df3b1SJaegeuk Kim /* change address */ 247e05df3b1SJaegeuk Kim nat_set_blkaddr(e, new_blkaddr); 248e05df3b1SJaegeuk Kim __set_nat_cache_dirty(nm_i, e); 249479f40c4SJaegeuk Kim 250479f40c4SJaegeuk Kim /* update fsync_mark if its inode nat entry is still alive */ 251479f40c4SJaegeuk Kim e = __lookup_nat_cache(nm_i, ni->ino); 252479f40c4SJaegeuk Kim if (e) 253479f40c4SJaegeuk Kim e->fsync_done = fsync_done; 254e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 255e05df3b1SJaegeuk Kim } 256e05df3b1SJaegeuk Kim 2574660f9c0SJaegeuk Kim int try_to_free_nats(struct f2fs_sb_info *sbi, int nr_shrink) 258e05df3b1SJaegeuk Kim { 259e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 260e05df3b1SJaegeuk Kim 2616fb03f3aSJaegeuk Kim if (available_free_memory(sbi, NAT_ENTRIES)) 262e05df3b1SJaegeuk Kim return 0; 263e05df3b1SJaegeuk Kim 264e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 265e05df3b1SJaegeuk Kim while (nr_shrink && !list_empty(&nm_i->nat_entries)) { 266e05df3b1SJaegeuk Kim struct nat_entry *ne; 267e05df3b1SJaegeuk Kim ne = list_first_entry(&nm_i->nat_entries, 268e05df3b1SJaegeuk Kim struct nat_entry, list); 269e05df3b1SJaegeuk Kim __del_from_nat_cache(nm_i, ne); 270e05df3b1SJaegeuk Kim nr_shrink--; 271e05df3b1SJaegeuk Kim } 272e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 273e05df3b1SJaegeuk Kim return nr_shrink; 274e05df3b1SJaegeuk Kim } 275e05df3b1SJaegeuk Kim 2760a8165d7SJaegeuk Kim /* 277e1c42045Sarter97 * This function always returns success 278e05df3b1SJaegeuk Kim */ 279e05df3b1SJaegeuk Kim void get_node_info(struct f2fs_sb_info *sbi, nid_t nid, struct node_info *ni) 280e05df3b1SJaegeuk Kim { 281e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 282e05df3b1SJaegeuk Kim struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); 283e05df3b1SJaegeuk Kim struct f2fs_summary_block *sum = curseg->sum_blk; 284e05df3b1SJaegeuk Kim nid_t start_nid = START_NID(nid); 285e05df3b1SJaegeuk Kim struct f2fs_nat_block *nat_blk; 286e05df3b1SJaegeuk Kim struct page *page = NULL; 287e05df3b1SJaegeuk Kim struct f2fs_nat_entry ne; 288e05df3b1SJaegeuk Kim struct nat_entry *e; 289e05df3b1SJaegeuk Kim int i; 290e05df3b1SJaegeuk Kim 291be4124f8SNamjae Jeon memset(&ne, 0, sizeof(struct f2fs_nat_entry)); 292e05df3b1SJaegeuk Kim ni->nid = nid; 293e05df3b1SJaegeuk Kim 294e05df3b1SJaegeuk Kim /* Check nat cache */ 295e05df3b1SJaegeuk Kim read_lock(&nm_i->nat_tree_lock); 296e05df3b1SJaegeuk Kim e = __lookup_nat_cache(nm_i, nid); 297e05df3b1SJaegeuk Kim if (e) { 298e05df3b1SJaegeuk Kim ni->ino = nat_get_ino(e); 299e05df3b1SJaegeuk Kim ni->blk_addr = nat_get_blkaddr(e); 300e05df3b1SJaegeuk Kim ni->version = nat_get_version(e); 301e05df3b1SJaegeuk Kim } 302e05df3b1SJaegeuk Kim read_unlock(&nm_i->nat_tree_lock); 303e05df3b1SJaegeuk Kim if (e) 304e05df3b1SJaegeuk Kim return; 305e05df3b1SJaegeuk Kim 306e05df3b1SJaegeuk Kim /* Check current segment summary */ 307e05df3b1SJaegeuk Kim mutex_lock(&curseg->curseg_mutex); 308e05df3b1SJaegeuk Kim i = lookup_journal_in_cursum(sum, NAT_JOURNAL, nid, 0); 309e05df3b1SJaegeuk Kim if (i >= 0) { 310e05df3b1SJaegeuk Kim ne = nat_in_journal(sum, i); 311e05df3b1SJaegeuk Kim node_info_from_raw_nat(ni, &ne); 312e05df3b1SJaegeuk Kim } 313e05df3b1SJaegeuk Kim mutex_unlock(&curseg->curseg_mutex); 314e05df3b1SJaegeuk Kim if (i >= 0) 315e05df3b1SJaegeuk Kim goto cache; 316e05df3b1SJaegeuk Kim 317e05df3b1SJaegeuk Kim /* Fill node_info from nat page */ 318e05df3b1SJaegeuk Kim page = get_current_nat_page(sbi, start_nid); 319e05df3b1SJaegeuk Kim nat_blk = (struct f2fs_nat_block *)page_address(page); 320e05df3b1SJaegeuk Kim ne = nat_blk->entries[nid - start_nid]; 321e05df3b1SJaegeuk Kim node_info_from_raw_nat(ni, &ne); 322e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 323e05df3b1SJaegeuk Kim cache: 324e05df3b1SJaegeuk Kim /* cache nat entry */ 325e05df3b1SJaegeuk Kim cache_nat_entry(NM_I(sbi), nid, &ne); 326e05df3b1SJaegeuk Kim } 327e05df3b1SJaegeuk Kim 3280a8165d7SJaegeuk Kim /* 329e05df3b1SJaegeuk Kim * The maximum depth is four. 330e05df3b1SJaegeuk Kim * Offset[0] will have raw inode offset. 331e05df3b1SJaegeuk Kim */ 332de93653fSJaegeuk Kim static int get_node_path(struct f2fs_inode_info *fi, long block, 333de93653fSJaegeuk Kim int offset[4], unsigned int noffset[4]) 334e05df3b1SJaegeuk Kim { 335de93653fSJaegeuk Kim const long direct_index = ADDRS_PER_INODE(fi); 336e05df3b1SJaegeuk Kim const long direct_blks = ADDRS_PER_BLOCK; 337e05df3b1SJaegeuk Kim const long dptrs_per_blk = NIDS_PER_BLOCK; 338e05df3b1SJaegeuk Kim const long indirect_blks = ADDRS_PER_BLOCK * NIDS_PER_BLOCK; 339e05df3b1SJaegeuk Kim const long dindirect_blks = indirect_blks * NIDS_PER_BLOCK; 340e05df3b1SJaegeuk Kim int n = 0; 341e05df3b1SJaegeuk Kim int level = 0; 342e05df3b1SJaegeuk Kim 343e05df3b1SJaegeuk Kim noffset[0] = 0; 344e05df3b1SJaegeuk Kim 345e05df3b1SJaegeuk Kim if (block < direct_index) { 34625c0a6e5SNamjae Jeon offset[n] = block; 347e05df3b1SJaegeuk Kim goto got; 348e05df3b1SJaegeuk Kim } 349e05df3b1SJaegeuk Kim block -= direct_index; 350e05df3b1SJaegeuk Kim if (block < direct_blks) { 351e05df3b1SJaegeuk Kim offset[n++] = NODE_DIR1_BLOCK; 352e05df3b1SJaegeuk Kim noffset[n] = 1; 35325c0a6e5SNamjae Jeon offset[n] = block; 354e05df3b1SJaegeuk Kim level = 1; 355e05df3b1SJaegeuk Kim goto got; 356e05df3b1SJaegeuk Kim } 357e05df3b1SJaegeuk Kim block -= direct_blks; 358e05df3b1SJaegeuk Kim if (block < direct_blks) { 359e05df3b1SJaegeuk Kim offset[n++] = NODE_DIR2_BLOCK; 360e05df3b1SJaegeuk Kim noffset[n] = 2; 36125c0a6e5SNamjae Jeon offset[n] = block; 362e05df3b1SJaegeuk Kim level = 1; 363e05df3b1SJaegeuk Kim goto got; 364e05df3b1SJaegeuk Kim } 365e05df3b1SJaegeuk Kim block -= direct_blks; 366e05df3b1SJaegeuk Kim if (block < indirect_blks) { 367e05df3b1SJaegeuk Kim offset[n++] = NODE_IND1_BLOCK; 368e05df3b1SJaegeuk Kim noffset[n] = 3; 369e05df3b1SJaegeuk Kim offset[n++] = block / direct_blks; 370e05df3b1SJaegeuk Kim noffset[n] = 4 + offset[n - 1]; 37125c0a6e5SNamjae Jeon offset[n] = block % direct_blks; 372e05df3b1SJaegeuk Kim level = 2; 373e05df3b1SJaegeuk Kim goto got; 374e05df3b1SJaegeuk Kim } 375e05df3b1SJaegeuk Kim block -= indirect_blks; 376e05df3b1SJaegeuk Kim if (block < indirect_blks) { 377e05df3b1SJaegeuk Kim offset[n++] = NODE_IND2_BLOCK; 378e05df3b1SJaegeuk Kim noffset[n] = 4 + dptrs_per_blk; 379e05df3b1SJaegeuk Kim offset[n++] = block / direct_blks; 380e05df3b1SJaegeuk Kim noffset[n] = 5 + dptrs_per_blk + offset[n - 1]; 38125c0a6e5SNamjae Jeon offset[n] = block % direct_blks; 382e05df3b1SJaegeuk Kim level = 2; 383e05df3b1SJaegeuk Kim goto got; 384e05df3b1SJaegeuk Kim } 385e05df3b1SJaegeuk Kim block -= indirect_blks; 386e05df3b1SJaegeuk Kim if (block < dindirect_blks) { 387e05df3b1SJaegeuk Kim offset[n++] = NODE_DIND_BLOCK; 388e05df3b1SJaegeuk Kim noffset[n] = 5 + (dptrs_per_blk * 2); 389e05df3b1SJaegeuk Kim offset[n++] = block / indirect_blks; 390e05df3b1SJaegeuk Kim noffset[n] = 6 + (dptrs_per_blk * 2) + 391e05df3b1SJaegeuk Kim offset[n - 1] * (dptrs_per_blk + 1); 392e05df3b1SJaegeuk Kim offset[n++] = (block / direct_blks) % dptrs_per_blk; 393e05df3b1SJaegeuk Kim noffset[n] = 7 + (dptrs_per_blk * 2) + 394e05df3b1SJaegeuk Kim offset[n - 2] * (dptrs_per_blk + 1) + 395e05df3b1SJaegeuk Kim offset[n - 1]; 39625c0a6e5SNamjae Jeon offset[n] = block % direct_blks; 397e05df3b1SJaegeuk Kim level = 3; 398e05df3b1SJaegeuk Kim goto got; 399e05df3b1SJaegeuk Kim } else { 400e05df3b1SJaegeuk Kim BUG(); 401e05df3b1SJaegeuk Kim } 402e05df3b1SJaegeuk Kim got: 403e05df3b1SJaegeuk Kim return level; 404e05df3b1SJaegeuk Kim } 405e05df3b1SJaegeuk Kim 406e05df3b1SJaegeuk Kim /* 407e05df3b1SJaegeuk Kim * Caller should call f2fs_put_dnode(dn). 4084f4124d0SChao Yu * Also, it should grab and release a rwsem by calling f2fs_lock_op() and 4094f4124d0SChao Yu * f2fs_unlock_op() only if ro is not set RDONLY_NODE. 41039936837SJaegeuk Kim * In the case of RDONLY_NODE, we don't need to care about mutex. 411e05df3b1SJaegeuk Kim */ 412266e97a8SJaegeuk Kim int get_dnode_of_data(struct dnode_of_data *dn, pgoff_t index, int mode) 413e05df3b1SJaegeuk Kim { 414e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); 415e05df3b1SJaegeuk Kim struct page *npage[4]; 416e05df3b1SJaegeuk Kim struct page *parent; 417e05df3b1SJaegeuk Kim int offset[4]; 418e05df3b1SJaegeuk Kim unsigned int noffset[4]; 419e05df3b1SJaegeuk Kim nid_t nids[4]; 420e05df3b1SJaegeuk Kim int level, i; 421e05df3b1SJaegeuk Kim int err = 0; 422e05df3b1SJaegeuk Kim 423de93653fSJaegeuk Kim level = get_node_path(F2FS_I(dn->inode), index, offset, noffset); 424e05df3b1SJaegeuk Kim 425e05df3b1SJaegeuk Kim nids[0] = dn->inode->i_ino; 4261646cfacSJaegeuk Kim npage[0] = dn->inode_page; 4271646cfacSJaegeuk Kim 4281646cfacSJaegeuk Kim if (!npage[0]) { 429e05df3b1SJaegeuk Kim npage[0] = get_node_page(sbi, nids[0]); 430e05df3b1SJaegeuk Kim if (IS_ERR(npage[0])) 431e05df3b1SJaegeuk Kim return PTR_ERR(npage[0]); 4321646cfacSJaegeuk Kim } 433e05df3b1SJaegeuk Kim parent = npage[0]; 43452c2db3fSChangman Lee if (level != 0) 435e05df3b1SJaegeuk Kim nids[1] = get_nid(parent, offset[0], true); 436e05df3b1SJaegeuk Kim dn->inode_page = npage[0]; 437e05df3b1SJaegeuk Kim dn->inode_page_locked = true; 438e05df3b1SJaegeuk Kim 439e05df3b1SJaegeuk Kim /* get indirect or direct nodes */ 440e05df3b1SJaegeuk Kim for (i = 1; i <= level; i++) { 441e05df3b1SJaegeuk Kim bool done = false; 442e05df3b1SJaegeuk Kim 443266e97a8SJaegeuk Kim if (!nids[i] && mode == ALLOC_NODE) { 444e05df3b1SJaegeuk Kim /* alloc new node */ 445e05df3b1SJaegeuk Kim if (!alloc_nid(sbi, &(nids[i]))) { 446e05df3b1SJaegeuk Kim err = -ENOSPC; 447e05df3b1SJaegeuk Kim goto release_pages; 448e05df3b1SJaegeuk Kim } 449e05df3b1SJaegeuk Kim 450e05df3b1SJaegeuk Kim dn->nid = nids[i]; 4518ae8f162SJaegeuk Kim npage[i] = new_node_page(dn, noffset[i], NULL); 452e05df3b1SJaegeuk Kim if (IS_ERR(npage[i])) { 453e05df3b1SJaegeuk Kim alloc_nid_failed(sbi, nids[i]); 454e05df3b1SJaegeuk Kim err = PTR_ERR(npage[i]); 455e05df3b1SJaegeuk Kim goto release_pages; 456e05df3b1SJaegeuk Kim } 457e05df3b1SJaegeuk Kim 458e05df3b1SJaegeuk Kim set_nid(parent, offset[i - 1], nids[i], i == 1); 459e05df3b1SJaegeuk Kim alloc_nid_done(sbi, nids[i]); 460e05df3b1SJaegeuk Kim done = true; 461266e97a8SJaegeuk Kim } else if (mode == LOOKUP_NODE_RA && i == level && level > 1) { 462e05df3b1SJaegeuk Kim npage[i] = get_node_page_ra(parent, offset[i - 1]); 463e05df3b1SJaegeuk Kim if (IS_ERR(npage[i])) { 464e05df3b1SJaegeuk Kim err = PTR_ERR(npage[i]); 465e05df3b1SJaegeuk Kim goto release_pages; 466e05df3b1SJaegeuk Kim } 467e05df3b1SJaegeuk Kim done = true; 468e05df3b1SJaegeuk Kim } 469e05df3b1SJaegeuk Kim if (i == 1) { 470e05df3b1SJaegeuk Kim dn->inode_page_locked = false; 471e05df3b1SJaegeuk Kim unlock_page(parent); 472e05df3b1SJaegeuk Kim } else { 473e05df3b1SJaegeuk Kim f2fs_put_page(parent, 1); 474e05df3b1SJaegeuk Kim } 475e05df3b1SJaegeuk Kim 476e05df3b1SJaegeuk Kim if (!done) { 477e05df3b1SJaegeuk Kim npage[i] = get_node_page(sbi, nids[i]); 478e05df3b1SJaegeuk Kim if (IS_ERR(npage[i])) { 479e05df3b1SJaegeuk Kim err = PTR_ERR(npage[i]); 480e05df3b1SJaegeuk Kim f2fs_put_page(npage[0], 0); 481e05df3b1SJaegeuk Kim goto release_out; 482e05df3b1SJaegeuk Kim } 483e05df3b1SJaegeuk Kim } 484e05df3b1SJaegeuk Kim if (i < level) { 485e05df3b1SJaegeuk Kim parent = npage[i]; 486e05df3b1SJaegeuk Kim nids[i + 1] = get_nid(parent, offset[i], false); 487e05df3b1SJaegeuk Kim } 488e05df3b1SJaegeuk Kim } 489e05df3b1SJaegeuk Kim dn->nid = nids[level]; 490e05df3b1SJaegeuk Kim dn->ofs_in_node = offset[level]; 491e05df3b1SJaegeuk Kim dn->node_page = npage[level]; 492e05df3b1SJaegeuk Kim dn->data_blkaddr = datablock_addr(dn->node_page, dn->ofs_in_node); 493e05df3b1SJaegeuk Kim return 0; 494e05df3b1SJaegeuk Kim 495e05df3b1SJaegeuk Kim release_pages: 496e05df3b1SJaegeuk Kim f2fs_put_page(parent, 1); 497e05df3b1SJaegeuk Kim if (i > 1) 498e05df3b1SJaegeuk Kim f2fs_put_page(npage[0], 0); 499e05df3b1SJaegeuk Kim release_out: 500e05df3b1SJaegeuk Kim dn->inode_page = NULL; 501e05df3b1SJaegeuk Kim dn->node_page = NULL; 502e05df3b1SJaegeuk Kim return err; 503e05df3b1SJaegeuk Kim } 504e05df3b1SJaegeuk Kim 505e05df3b1SJaegeuk Kim static void truncate_node(struct dnode_of_data *dn) 506e05df3b1SJaegeuk Kim { 507e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); 508e05df3b1SJaegeuk Kim struct node_info ni; 509e05df3b1SJaegeuk Kim 510e05df3b1SJaegeuk Kim get_node_info(sbi, dn->nid, &ni); 51171e9fec5SJaegeuk Kim if (dn->inode->i_blocks == 0) { 5125d56b671SJaegeuk Kim f2fs_bug_on(ni.blk_addr != NULL_ADDR); 51371e9fec5SJaegeuk Kim goto invalidate; 51471e9fec5SJaegeuk Kim } 5155d56b671SJaegeuk Kim f2fs_bug_on(ni.blk_addr == NULL_ADDR); 516e05df3b1SJaegeuk Kim 517e05df3b1SJaegeuk Kim /* Deallocate node address */ 51871e9fec5SJaegeuk Kim invalidate_blocks(sbi, ni.blk_addr); 519ef86d709SGu Zheng dec_valid_node_count(sbi, dn->inode); 520479f40c4SJaegeuk Kim set_node_addr(sbi, &ni, NULL_ADDR, false); 521e05df3b1SJaegeuk Kim 522e05df3b1SJaegeuk Kim if (dn->nid == dn->inode->i_ino) { 523e05df3b1SJaegeuk Kim remove_orphan_inode(sbi, dn->nid); 524e05df3b1SJaegeuk Kim dec_valid_inode_count(sbi); 525e05df3b1SJaegeuk Kim } else { 526e05df3b1SJaegeuk Kim sync_inode_page(dn); 527e05df3b1SJaegeuk Kim } 52871e9fec5SJaegeuk Kim invalidate: 529e05df3b1SJaegeuk Kim clear_node_page_dirty(dn->node_page); 530e05df3b1SJaegeuk Kim F2FS_SET_SB_DIRT(sbi); 531e05df3b1SJaegeuk Kim 532e05df3b1SJaegeuk Kim f2fs_put_page(dn->node_page, 1); 533bf39c00aSJaegeuk Kim 534bf39c00aSJaegeuk Kim invalidate_mapping_pages(NODE_MAPPING(sbi), 535bf39c00aSJaegeuk Kim dn->node_page->index, dn->node_page->index); 536bf39c00aSJaegeuk Kim 537e05df3b1SJaegeuk Kim dn->node_page = NULL; 53851dd6249SNamjae Jeon trace_f2fs_truncate_node(dn->inode, dn->nid, ni.blk_addr); 539e05df3b1SJaegeuk Kim } 540e05df3b1SJaegeuk Kim 541e05df3b1SJaegeuk Kim static int truncate_dnode(struct dnode_of_data *dn) 542e05df3b1SJaegeuk Kim { 543e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); 544e05df3b1SJaegeuk Kim struct page *page; 545e05df3b1SJaegeuk Kim 546e05df3b1SJaegeuk Kim if (dn->nid == 0) 547e05df3b1SJaegeuk Kim return 1; 548e05df3b1SJaegeuk Kim 549e05df3b1SJaegeuk Kim /* get direct node */ 550e05df3b1SJaegeuk Kim page = get_node_page(sbi, dn->nid); 551e05df3b1SJaegeuk Kim if (IS_ERR(page) && PTR_ERR(page) == -ENOENT) 552e05df3b1SJaegeuk Kim return 1; 553e05df3b1SJaegeuk Kim else if (IS_ERR(page)) 554e05df3b1SJaegeuk Kim return PTR_ERR(page); 555e05df3b1SJaegeuk Kim 556e05df3b1SJaegeuk Kim /* Make dnode_of_data for parameter */ 557e05df3b1SJaegeuk Kim dn->node_page = page; 558e05df3b1SJaegeuk Kim dn->ofs_in_node = 0; 559e05df3b1SJaegeuk Kim truncate_data_blocks(dn); 560e05df3b1SJaegeuk Kim truncate_node(dn); 561e05df3b1SJaegeuk Kim return 1; 562e05df3b1SJaegeuk Kim } 563e05df3b1SJaegeuk Kim 564e05df3b1SJaegeuk Kim static int truncate_nodes(struct dnode_of_data *dn, unsigned int nofs, 565e05df3b1SJaegeuk Kim int ofs, int depth) 566e05df3b1SJaegeuk Kim { 567e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); 568e05df3b1SJaegeuk Kim struct dnode_of_data rdn = *dn; 569e05df3b1SJaegeuk Kim struct page *page; 570e05df3b1SJaegeuk Kim struct f2fs_node *rn; 571e05df3b1SJaegeuk Kim nid_t child_nid; 572e05df3b1SJaegeuk Kim unsigned int child_nofs; 573e05df3b1SJaegeuk Kim int freed = 0; 574e05df3b1SJaegeuk Kim int i, ret; 575e05df3b1SJaegeuk Kim 576e05df3b1SJaegeuk Kim if (dn->nid == 0) 577e05df3b1SJaegeuk Kim return NIDS_PER_BLOCK + 1; 578e05df3b1SJaegeuk Kim 57951dd6249SNamjae Jeon trace_f2fs_truncate_nodes_enter(dn->inode, dn->nid, dn->data_blkaddr); 58051dd6249SNamjae Jeon 581e05df3b1SJaegeuk Kim page = get_node_page(sbi, dn->nid); 58251dd6249SNamjae Jeon if (IS_ERR(page)) { 58351dd6249SNamjae Jeon trace_f2fs_truncate_nodes_exit(dn->inode, PTR_ERR(page)); 584e05df3b1SJaegeuk Kim return PTR_ERR(page); 58551dd6249SNamjae Jeon } 586e05df3b1SJaegeuk Kim 58745590710SGu Zheng rn = F2FS_NODE(page); 588e05df3b1SJaegeuk Kim if (depth < 3) { 589e05df3b1SJaegeuk Kim for (i = ofs; i < NIDS_PER_BLOCK; i++, freed++) { 590e05df3b1SJaegeuk Kim child_nid = le32_to_cpu(rn->in.nid[i]); 591e05df3b1SJaegeuk Kim if (child_nid == 0) 592e05df3b1SJaegeuk Kim continue; 593e05df3b1SJaegeuk Kim rdn.nid = child_nid; 594e05df3b1SJaegeuk Kim ret = truncate_dnode(&rdn); 595e05df3b1SJaegeuk Kim if (ret < 0) 596e05df3b1SJaegeuk Kim goto out_err; 597e05df3b1SJaegeuk Kim set_nid(page, i, 0, false); 598e05df3b1SJaegeuk Kim } 599e05df3b1SJaegeuk Kim } else { 600e05df3b1SJaegeuk Kim child_nofs = nofs + ofs * (NIDS_PER_BLOCK + 1) + 1; 601e05df3b1SJaegeuk Kim for (i = ofs; i < NIDS_PER_BLOCK; i++) { 602e05df3b1SJaegeuk Kim child_nid = le32_to_cpu(rn->in.nid[i]); 603e05df3b1SJaegeuk Kim if (child_nid == 0) { 604e05df3b1SJaegeuk Kim child_nofs += NIDS_PER_BLOCK + 1; 605e05df3b1SJaegeuk Kim continue; 606e05df3b1SJaegeuk Kim } 607e05df3b1SJaegeuk Kim rdn.nid = child_nid; 608e05df3b1SJaegeuk Kim ret = truncate_nodes(&rdn, child_nofs, 0, depth - 1); 609e05df3b1SJaegeuk Kim if (ret == (NIDS_PER_BLOCK + 1)) { 610e05df3b1SJaegeuk Kim set_nid(page, i, 0, false); 611e05df3b1SJaegeuk Kim child_nofs += ret; 612e05df3b1SJaegeuk Kim } else if (ret < 0 && ret != -ENOENT) { 613e05df3b1SJaegeuk Kim goto out_err; 614e05df3b1SJaegeuk Kim } 615e05df3b1SJaegeuk Kim } 616e05df3b1SJaegeuk Kim freed = child_nofs; 617e05df3b1SJaegeuk Kim } 618e05df3b1SJaegeuk Kim 619e05df3b1SJaegeuk Kim if (!ofs) { 620e05df3b1SJaegeuk Kim /* remove current indirect node */ 621e05df3b1SJaegeuk Kim dn->node_page = page; 622e05df3b1SJaegeuk Kim truncate_node(dn); 623e05df3b1SJaegeuk Kim freed++; 624e05df3b1SJaegeuk Kim } else { 625e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 626e05df3b1SJaegeuk Kim } 62751dd6249SNamjae Jeon trace_f2fs_truncate_nodes_exit(dn->inode, freed); 628e05df3b1SJaegeuk Kim return freed; 629e05df3b1SJaegeuk Kim 630e05df3b1SJaegeuk Kim out_err: 631e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 63251dd6249SNamjae Jeon trace_f2fs_truncate_nodes_exit(dn->inode, ret); 633e05df3b1SJaegeuk Kim return ret; 634e05df3b1SJaegeuk Kim } 635e05df3b1SJaegeuk Kim 636e05df3b1SJaegeuk Kim static int truncate_partial_nodes(struct dnode_of_data *dn, 637e05df3b1SJaegeuk Kim struct f2fs_inode *ri, int *offset, int depth) 638e05df3b1SJaegeuk Kim { 639e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); 640e05df3b1SJaegeuk Kim struct page *pages[2]; 641e05df3b1SJaegeuk Kim nid_t nid[3]; 642e05df3b1SJaegeuk Kim nid_t child_nid; 643e05df3b1SJaegeuk Kim int err = 0; 644e05df3b1SJaegeuk Kim int i; 645e05df3b1SJaegeuk Kim int idx = depth - 2; 646e05df3b1SJaegeuk Kim 647e05df3b1SJaegeuk Kim nid[0] = le32_to_cpu(ri->i_nid[offset[0] - NODE_DIR1_BLOCK]); 648e05df3b1SJaegeuk Kim if (!nid[0]) 649e05df3b1SJaegeuk Kim return 0; 650e05df3b1SJaegeuk Kim 651e05df3b1SJaegeuk Kim /* get indirect nodes in the path */ 652a225dca3Sshifei10.ge for (i = 0; i < idx + 1; i++) { 653e1c42045Sarter97 /* reference count'll be increased */ 654e05df3b1SJaegeuk Kim pages[i] = get_node_page(sbi, nid[i]); 655e05df3b1SJaegeuk Kim if (IS_ERR(pages[i])) { 656e05df3b1SJaegeuk Kim err = PTR_ERR(pages[i]); 657a225dca3Sshifei10.ge idx = i - 1; 658e05df3b1SJaegeuk Kim goto fail; 659e05df3b1SJaegeuk Kim } 660e05df3b1SJaegeuk Kim nid[i + 1] = get_nid(pages[i], offset[i + 1], false); 661e05df3b1SJaegeuk Kim } 662e05df3b1SJaegeuk Kim 663e05df3b1SJaegeuk Kim /* free direct nodes linked to a partial indirect node */ 664a225dca3Sshifei10.ge for (i = offset[idx + 1]; i < NIDS_PER_BLOCK; i++) { 665e05df3b1SJaegeuk Kim child_nid = get_nid(pages[idx], i, false); 666e05df3b1SJaegeuk Kim if (!child_nid) 667e05df3b1SJaegeuk Kim continue; 668e05df3b1SJaegeuk Kim dn->nid = child_nid; 669e05df3b1SJaegeuk Kim err = truncate_dnode(dn); 670e05df3b1SJaegeuk Kim if (err < 0) 671e05df3b1SJaegeuk Kim goto fail; 672e05df3b1SJaegeuk Kim set_nid(pages[idx], i, 0, false); 673e05df3b1SJaegeuk Kim } 674e05df3b1SJaegeuk Kim 675a225dca3Sshifei10.ge if (offset[idx + 1] == 0) { 676e05df3b1SJaegeuk Kim dn->node_page = pages[idx]; 677e05df3b1SJaegeuk Kim dn->nid = nid[idx]; 678e05df3b1SJaegeuk Kim truncate_node(dn); 679e05df3b1SJaegeuk Kim } else { 680e05df3b1SJaegeuk Kim f2fs_put_page(pages[idx], 1); 681e05df3b1SJaegeuk Kim } 682e05df3b1SJaegeuk Kim offset[idx]++; 683a225dca3Sshifei10.ge offset[idx + 1] = 0; 684a225dca3Sshifei10.ge idx--; 685e05df3b1SJaegeuk Kim fail: 686a225dca3Sshifei10.ge for (i = idx; i >= 0; i--) 687e05df3b1SJaegeuk Kim f2fs_put_page(pages[i], 1); 68851dd6249SNamjae Jeon 68951dd6249SNamjae Jeon trace_f2fs_truncate_partial_nodes(dn->inode, nid, depth, err); 69051dd6249SNamjae Jeon 691e05df3b1SJaegeuk Kim return err; 692e05df3b1SJaegeuk Kim } 693e05df3b1SJaegeuk Kim 6940a8165d7SJaegeuk Kim /* 695e05df3b1SJaegeuk Kim * All the block addresses of data and nodes should be nullified. 696e05df3b1SJaegeuk Kim */ 697e05df3b1SJaegeuk Kim int truncate_inode_blocks(struct inode *inode, pgoff_t from) 698e05df3b1SJaegeuk Kim { 699e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); 700e05df3b1SJaegeuk Kim int err = 0, cont = 1; 701e05df3b1SJaegeuk Kim int level, offset[4], noffset[4]; 7027dd690c8SJaegeuk Kim unsigned int nofs = 0; 70358bfaf44SJaegeuk Kim struct f2fs_inode *ri; 704e05df3b1SJaegeuk Kim struct dnode_of_data dn; 705e05df3b1SJaegeuk Kim struct page *page; 706e05df3b1SJaegeuk Kim 70751dd6249SNamjae Jeon trace_f2fs_truncate_inode_blocks_enter(inode, from); 70851dd6249SNamjae Jeon 709de93653fSJaegeuk Kim level = get_node_path(F2FS_I(inode), from, offset, noffset); 710afcb7ca0SJaegeuk Kim restart: 711e05df3b1SJaegeuk Kim page = get_node_page(sbi, inode->i_ino); 71251dd6249SNamjae Jeon if (IS_ERR(page)) { 71351dd6249SNamjae Jeon trace_f2fs_truncate_inode_blocks_exit(inode, PTR_ERR(page)); 714e05df3b1SJaegeuk Kim return PTR_ERR(page); 71551dd6249SNamjae Jeon } 716e05df3b1SJaegeuk Kim 717e05df3b1SJaegeuk Kim set_new_dnode(&dn, inode, page, NULL, 0); 718e05df3b1SJaegeuk Kim unlock_page(page); 719e05df3b1SJaegeuk Kim 72058bfaf44SJaegeuk Kim ri = F2FS_INODE(page); 721e05df3b1SJaegeuk Kim switch (level) { 722e05df3b1SJaegeuk Kim case 0: 723e05df3b1SJaegeuk Kim case 1: 724e05df3b1SJaegeuk Kim nofs = noffset[1]; 725e05df3b1SJaegeuk Kim break; 726e05df3b1SJaegeuk Kim case 2: 727e05df3b1SJaegeuk Kim nofs = noffset[1]; 728e05df3b1SJaegeuk Kim if (!offset[level - 1]) 729e05df3b1SJaegeuk Kim goto skip_partial; 73058bfaf44SJaegeuk Kim err = truncate_partial_nodes(&dn, ri, offset, level); 731e05df3b1SJaegeuk Kim if (err < 0 && err != -ENOENT) 732e05df3b1SJaegeuk Kim goto fail; 733e05df3b1SJaegeuk Kim nofs += 1 + NIDS_PER_BLOCK; 734e05df3b1SJaegeuk Kim break; 735e05df3b1SJaegeuk Kim case 3: 736e05df3b1SJaegeuk Kim nofs = 5 + 2 * NIDS_PER_BLOCK; 737e05df3b1SJaegeuk Kim if (!offset[level - 1]) 738e05df3b1SJaegeuk Kim goto skip_partial; 73958bfaf44SJaegeuk Kim err = truncate_partial_nodes(&dn, ri, offset, level); 740e05df3b1SJaegeuk Kim if (err < 0 && err != -ENOENT) 741e05df3b1SJaegeuk Kim goto fail; 742e05df3b1SJaegeuk Kim break; 743e05df3b1SJaegeuk Kim default: 744e05df3b1SJaegeuk Kim BUG(); 745e05df3b1SJaegeuk Kim } 746e05df3b1SJaegeuk Kim 747e05df3b1SJaegeuk Kim skip_partial: 748e05df3b1SJaegeuk Kim while (cont) { 74958bfaf44SJaegeuk Kim dn.nid = le32_to_cpu(ri->i_nid[offset[0] - NODE_DIR1_BLOCK]); 750e05df3b1SJaegeuk Kim switch (offset[0]) { 751e05df3b1SJaegeuk Kim case NODE_DIR1_BLOCK: 752e05df3b1SJaegeuk Kim case NODE_DIR2_BLOCK: 753e05df3b1SJaegeuk Kim err = truncate_dnode(&dn); 754e05df3b1SJaegeuk Kim break; 755e05df3b1SJaegeuk Kim 756e05df3b1SJaegeuk Kim case NODE_IND1_BLOCK: 757e05df3b1SJaegeuk Kim case NODE_IND2_BLOCK: 758e05df3b1SJaegeuk Kim err = truncate_nodes(&dn, nofs, offset[1], 2); 759e05df3b1SJaegeuk Kim break; 760e05df3b1SJaegeuk Kim 761e05df3b1SJaegeuk Kim case NODE_DIND_BLOCK: 762e05df3b1SJaegeuk Kim err = truncate_nodes(&dn, nofs, offset[1], 3); 763e05df3b1SJaegeuk Kim cont = 0; 764e05df3b1SJaegeuk Kim break; 765e05df3b1SJaegeuk Kim 766e05df3b1SJaegeuk Kim default: 767e05df3b1SJaegeuk Kim BUG(); 768e05df3b1SJaegeuk Kim } 769e05df3b1SJaegeuk Kim if (err < 0 && err != -ENOENT) 770e05df3b1SJaegeuk Kim goto fail; 771e05df3b1SJaegeuk Kim if (offset[1] == 0 && 77258bfaf44SJaegeuk Kim ri->i_nid[offset[0] - NODE_DIR1_BLOCK]) { 773e05df3b1SJaegeuk Kim lock_page(page); 7744ef51a8fSJaegeuk Kim if (unlikely(page->mapping != NODE_MAPPING(sbi))) { 775afcb7ca0SJaegeuk Kim f2fs_put_page(page, 1); 776afcb7ca0SJaegeuk Kim goto restart; 777afcb7ca0SJaegeuk Kim } 7783cb5ad15SJaegeuk Kim f2fs_wait_on_page_writeback(page, NODE); 77958bfaf44SJaegeuk Kim ri->i_nid[offset[0] - NODE_DIR1_BLOCK] = 0; 780e05df3b1SJaegeuk Kim set_page_dirty(page); 781e05df3b1SJaegeuk Kim unlock_page(page); 782e05df3b1SJaegeuk Kim } 783e05df3b1SJaegeuk Kim offset[1] = 0; 784e05df3b1SJaegeuk Kim offset[0]++; 785e05df3b1SJaegeuk Kim nofs += err; 786e05df3b1SJaegeuk Kim } 787e05df3b1SJaegeuk Kim fail: 788e05df3b1SJaegeuk Kim f2fs_put_page(page, 0); 78951dd6249SNamjae Jeon trace_f2fs_truncate_inode_blocks_exit(inode, err); 790e05df3b1SJaegeuk Kim return err > 0 ? 0 : err; 791e05df3b1SJaegeuk Kim } 792e05df3b1SJaegeuk Kim 7934f16fb0fSJaegeuk Kim int truncate_xattr_node(struct inode *inode, struct page *page) 7944f16fb0fSJaegeuk Kim { 7954f16fb0fSJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); 7964f16fb0fSJaegeuk Kim nid_t nid = F2FS_I(inode)->i_xattr_nid; 7974f16fb0fSJaegeuk Kim struct dnode_of_data dn; 7984f16fb0fSJaegeuk Kim struct page *npage; 7994f16fb0fSJaegeuk Kim 8004f16fb0fSJaegeuk Kim if (!nid) 8014f16fb0fSJaegeuk Kim return 0; 8024f16fb0fSJaegeuk Kim 8034f16fb0fSJaegeuk Kim npage = get_node_page(sbi, nid); 8044f16fb0fSJaegeuk Kim if (IS_ERR(npage)) 8054f16fb0fSJaegeuk Kim return PTR_ERR(npage); 8064f16fb0fSJaegeuk Kim 8074f16fb0fSJaegeuk Kim F2FS_I(inode)->i_xattr_nid = 0; 80865985d93SJaegeuk Kim 80965985d93SJaegeuk Kim /* need to do checkpoint during fsync */ 81065985d93SJaegeuk Kim F2FS_I(inode)->xattr_ver = cur_cp_version(F2FS_CKPT(sbi)); 81165985d93SJaegeuk Kim 8124f16fb0fSJaegeuk Kim set_new_dnode(&dn, inode, page, npage, nid); 8134f16fb0fSJaegeuk Kim 8144f16fb0fSJaegeuk Kim if (page) 81501d2d1aaSChao Yu dn.inode_page_locked = true; 8164f16fb0fSJaegeuk Kim truncate_node(&dn); 8174f16fb0fSJaegeuk Kim return 0; 8184f16fb0fSJaegeuk Kim } 8194f16fb0fSJaegeuk Kim 82039936837SJaegeuk Kim /* 8214f4124d0SChao Yu * Caller should grab and release a rwsem by calling f2fs_lock_op() and 8224f4124d0SChao Yu * f2fs_unlock_op(). 82339936837SJaegeuk Kim */ 82458e674d6SGu Zheng void remove_inode_page(struct inode *inode) 825e05df3b1SJaegeuk Kim { 826e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); 827e05df3b1SJaegeuk Kim struct page *page; 828e05df3b1SJaegeuk Kim nid_t ino = inode->i_ino; 829e05df3b1SJaegeuk Kim struct dnode_of_data dn; 830e05df3b1SJaegeuk Kim 831e05df3b1SJaegeuk Kim page = get_node_page(sbi, ino); 83239936837SJaegeuk Kim if (IS_ERR(page)) 83358e674d6SGu Zheng return; 834e05df3b1SJaegeuk Kim 83558e674d6SGu Zheng if (truncate_xattr_node(inode, page)) { 8364f16fb0fSJaegeuk Kim f2fs_put_page(page, 1); 83758e674d6SGu Zheng return; 838e05df3b1SJaegeuk Kim } 839e1c42045Sarter97 /* 0 is possible, after f2fs_new_inode() has failed */ 8405d56b671SJaegeuk Kim f2fs_bug_on(inode->i_blocks != 0 && inode->i_blocks != 1); 841e05df3b1SJaegeuk Kim set_new_dnode(&dn, inode, page, page, ino); 842e05df3b1SJaegeuk Kim truncate_node(&dn); 843e05df3b1SJaegeuk Kim } 844e05df3b1SJaegeuk Kim 845a014e037SJaegeuk Kim struct page *new_inode_page(struct inode *inode) 846e05df3b1SJaegeuk Kim { 847e05df3b1SJaegeuk Kim struct dnode_of_data dn; 848e05df3b1SJaegeuk Kim 849e05df3b1SJaegeuk Kim /* allocate inode page for new inode */ 850e05df3b1SJaegeuk Kim set_new_dnode(&dn, inode, NULL, NULL, inode->i_ino); 85144a83ff6SJaegeuk Kim 85244a83ff6SJaegeuk Kim /* caller should f2fs_put_page(page, 1); */ 8538ae8f162SJaegeuk Kim return new_node_page(&dn, 0, NULL); 854e05df3b1SJaegeuk Kim } 855e05df3b1SJaegeuk Kim 8568ae8f162SJaegeuk Kim struct page *new_node_page(struct dnode_of_data *dn, 8578ae8f162SJaegeuk Kim unsigned int ofs, struct page *ipage) 858e05df3b1SJaegeuk Kim { 859e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); 860e05df3b1SJaegeuk Kim struct node_info old_ni, new_ni; 861e05df3b1SJaegeuk Kim struct page *page; 862e05df3b1SJaegeuk Kim int err; 863e05df3b1SJaegeuk Kim 8646bacf52fSJaegeuk Kim if (unlikely(is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC))) 865e05df3b1SJaegeuk Kim return ERR_PTR(-EPERM); 866e05df3b1SJaegeuk Kim 86754b591dfSJaegeuk Kim page = grab_cache_page(NODE_MAPPING(sbi), dn->nid); 868e05df3b1SJaegeuk Kim if (!page) 869e05df3b1SJaegeuk Kim return ERR_PTR(-ENOMEM); 870e05df3b1SJaegeuk Kim 8716bacf52fSJaegeuk Kim if (unlikely(!inc_valid_node_count(sbi, dn->inode))) { 8729c02740cSJaegeuk Kim err = -ENOSPC; 8739c02740cSJaegeuk Kim goto fail; 8749c02740cSJaegeuk Kim } 875e05df3b1SJaegeuk Kim 8769c02740cSJaegeuk Kim get_node_info(sbi, dn->nid, &old_ni); 877e05df3b1SJaegeuk Kim 878e05df3b1SJaegeuk Kim /* Reinitialize old_ni with new node page */ 8795d56b671SJaegeuk Kim f2fs_bug_on(old_ni.blk_addr != NULL_ADDR); 880e05df3b1SJaegeuk Kim new_ni = old_ni; 881e05df3b1SJaegeuk Kim new_ni.ino = dn->inode->i_ino; 882479f40c4SJaegeuk Kim set_node_addr(sbi, &new_ni, NEW_ADDR, false); 8839c02740cSJaegeuk Kim 88454b591dfSJaegeuk Kim f2fs_wait_on_page_writeback(page, NODE); 8859c02740cSJaegeuk Kim fill_node_footer(page, dn->nid, dn->inode->i_ino, ofs, true); 886398b1ac5SJaegeuk Kim set_cold_node(dn->inode, page); 8879c02740cSJaegeuk Kim SetPageUptodate(page); 8889c02740cSJaegeuk Kim set_page_dirty(page); 889e05df3b1SJaegeuk Kim 8904bc8e9bcSChao Yu if (f2fs_has_xattr_block(ofs)) 891479bd73aSJaegeuk Kim F2FS_I(dn->inode)->i_xattr_nid = dn->nid; 892479bd73aSJaegeuk Kim 893e05df3b1SJaegeuk Kim dn->node_page = page; 8948ae8f162SJaegeuk Kim if (ipage) 8958ae8f162SJaegeuk Kim update_inode(dn->inode, ipage); 8968ae8f162SJaegeuk Kim else 897e05df3b1SJaegeuk Kim sync_inode_page(dn); 898e05df3b1SJaegeuk Kim if (ofs == 0) 899e05df3b1SJaegeuk Kim inc_valid_inode_count(sbi); 900e05df3b1SJaegeuk Kim 901e05df3b1SJaegeuk Kim return page; 902e05df3b1SJaegeuk Kim 903e05df3b1SJaegeuk Kim fail: 90471e9fec5SJaegeuk Kim clear_node_page_dirty(page); 905e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 906e05df3b1SJaegeuk Kim return ERR_PTR(err); 907e05df3b1SJaegeuk Kim } 908e05df3b1SJaegeuk Kim 90956ae674cSJaegeuk Kim /* 91056ae674cSJaegeuk Kim * Caller should do after getting the following values. 91156ae674cSJaegeuk Kim * 0: f2fs_put_page(page, 0) 91256ae674cSJaegeuk Kim * LOCKED_PAGE: f2fs_put_page(page, 1) 91356ae674cSJaegeuk Kim * error: nothing 91456ae674cSJaegeuk Kim */ 91593dfe2acSJaegeuk Kim static int read_node_page(struct page *page, int rw) 916e05df3b1SJaegeuk Kim { 917e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(page->mapping->host->i_sb); 918e05df3b1SJaegeuk Kim struct node_info ni; 919e05df3b1SJaegeuk Kim 920e05df3b1SJaegeuk Kim get_node_info(sbi, page->index, &ni); 921e05df3b1SJaegeuk Kim 9226bacf52fSJaegeuk Kim if (unlikely(ni.blk_addr == NULL_ADDR)) { 923393ff91fSJaegeuk Kim f2fs_put_page(page, 1); 924e05df3b1SJaegeuk Kim return -ENOENT; 925393ff91fSJaegeuk Kim } 926393ff91fSJaegeuk Kim 92756ae674cSJaegeuk Kim if (PageUptodate(page)) 92856ae674cSJaegeuk Kim return LOCKED_PAGE; 929393ff91fSJaegeuk Kim 93093dfe2acSJaegeuk Kim return f2fs_submit_page_bio(sbi, page, ni.blk_addr, rw); 931e05df3b1SJaegeuk Kim } 932e05df3b1SJaegeuk Kim 9330a8165d7SJaegeuk Kim /* 934e05df3b1SJaegeuk Kim * Readahead a node page 935e05df3b1SJaegeuk Kim */ 936e05df3b1SJaegeuk Kim void ra_node_page(struct f2fs_sb_info *sbi, nid_t nid) 937e05df3b1SJaegeuk Kim { 938e05df3b1SJaegeuk Kim struct page *apage; 93956ae674cSJaegeuk Kim int err; 940e05df3b1SJaegeuk Kim 9414ef51a8fSJaegeuk Kim apage = find_get_page(NODE_MAPPING(sbi), nid); 942393ff91fSJaegeuk Kim if (apage && PageUptodate(apage)) { 943393ff91fSJaegeuk Kim f2fs_put_page(apage, 0); 944393ff91fSJaegeuk Kim return; 945393ff91fSJaegeuk Kim } 946e05df3b1SJaegeuk Kim f2fs_put_page(apage, 0); 947e05df3b1SJaegeuk Kim 9484ef51a8fSJaegeuk Kim apage = grab_cache_page(NODE_MAPPING(sbi), nid); 949e05df3b1SJaegeuk Kim if (!apage) 950e05df3b1SJaegeuk Kim return; 951e05df3b1SJaegeuk Kim 95256ae674cSJaegeuk Kim err = read_node_page(apage, READA); 95356ae674cSJaegeuk Kim if (err == 0) 954369a708cSJaegeuk Kim f2fs_put_page(apage, 0); 95556ae674cSJaegeuk Kim else if (err == LOCKED_PAGE) 95656ae674cSJaegeuk Kim f2fs_put_page(apage, 1); 957e05df3b1SJaegeuk Kim } 958e05df3b1SJaegeuk Kim 959e05df3b1SJaegeuk Kim struct page *get_node_page(struct f2fs_sb_info *sbi, pgoff_t nid) 960e05df3b1SJaegeuk Kim { 96156ae674cSJaegeuk Kim struct page *page; 96256ae674cSJaegeuk Kim int err; 963afcb7ca0SJaegeuk Kim repeat: 96454b591dfSJaegeuk Kim page = grab_cache_page(NODE_MAPPING(sbi), nid); 965e05df3b1SJaegeuk Kim if (!page) 966e05df3b1SJaegeuk Kim return ERR_PTR(-ENOMEM); 967e05df3b1SJaegeuk Kim 968e05df3b1SJaegeuk Kim err = read_node_page(page, READ_SYNC); 96956ae674cSJaegeuk Kim if (err < 0) 970e05df3b1SJaegeuk Kim return ERR_PTR(err); 97156ae674cSJaegeuk Kim else if (err == LOCKED_PAGE) 97256ae674cSJaegeuk Kim goto got_it; 973e05df3b1SJaegeuk Kim 974393ff91fSJaegeuk Kim lock_page(page); 9753bb5e2c8SJaegeuk Kim if (unlikely(!PageUptodate(page) || nid != nid_of_node(page))) { 976393ff91fSJaegeuk Kim f2fs_put_page(page, 1); 977393ff91fSJaegeuk Kim return ERR_PTR(-EIO); 978393ff91fSJaegeuk Kim } 9794ef51a8fSJaegeuk Kim if (unlikely(page->mapping != NODE_MAPPING(sbi))) { 980afcb7ca0SJaegeuk Kim f2fs_put_page(page, 1); 981afcb7ca0SJaegeuk Kim goto repeat; 982afcb7ca0SJaegeuk Kim } 98356ae674cSJaegeuk Kim got_it: 984e05df3b1SJaegeuk Kim return page; 985e05df3b1SJaegeuk Kim } 986e05df3b1SJaegeuk Kim 9870a8165d7SJaegeuk Kim /* 988e05df3b1SJaegeuk Kim * Return a locked page for the desired node page. 989e05df3b1SJaegeuk Kim * And, readahead MAX_RA_NODE number of node pages. 990e05df3b1SJaegeuk Kim */ 991e05df3b1SJaegeuk Kim struct page *get_node_page_ra(struct page *parent, int start) 992e05df3b1SJaegeuk Kim { 993e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(parent->mapping->host->i_sb); 994c718379bSJaegeuk Kim struct blk_plug plug; 995e05df3b1SJaegeuk Kim struct page *page; 99656ae674cSJaegeuk Kim int err, i, end; 99756ae674cSJaegeuk Kim nid_t nid; 998e05df3b1SJaegeuk Kim 999e05df3b1SJaegeuk Kim /* First, try getting the desired direct node. */ 1000e05df3b1SJaegeuk Kim nid = get_nid(parent, start, false); 1001e05df3b1SJaegeuk Kim if (!nid) 1002e05df3b1SJaegeuk Kim return ERR_PTR(-ENOENT); 1003afcb7ca0SJaegeuk Kim repeat: 10044ef51a8fSJaegeuk Kim page = grab_cache_page(NODE_MAPPING(sbi), nid); 1005e05df3b1SJaegeuk Kim if (!page) 1006e05df3b1SJaegeuk Kim return ERR_PTR(-ENOMEM); 1007e05df3b1SJaegeuk Kim 100866d36a29SJaegeuk Kim err = read_node_page(page, READ_SYNC); 100956ae674cSJaegeuk Kim if (err < 0) 1010e05df3b1SJaegeuk Kim return ERR_PTR(err); 101156ae674cSJaegeuk Kim else if (err == LOCKED_PAGE) 101256ae674cSJaegeuk Kim goto page_hit; 1013e05df3b1SJaegeuk Kim 1014c718379bSJaegeuk Kim blk_start_plug(&plug); 1015c718379bSJaegeuk Kim 1016e05df3b1SJaegeuk Kim /* Then, try readahead for siblings of the desired node */ 1017e05df3b1SJaegeuk Kim end = start + MAX_RA_NODE; 1018e05df3b1SJaegeuk Kim end = min(end, NIDS_PER_BLOCK); 1019e05df3b1SJaegeuk Kim for (i = start + 1; i < end; i++) { 1020e05df3b1SJaegeuk Kim nid = get_nid(parent, i, false); 1021e05df3b1SJaegeuk Kim if (!nid) 1022e05df3b1SJaegeuk Kim continue; 1023e05df3b1SJaegeuk Kim ra_node_page(sbi, nid); 1024e05df3b1SJaegeuk Kim } 1025e05df3b1SJaegeuk Kim 1026c718379bSJaegeuk Kim blk_finish_plug(&plug); 1027c718379bSJaegeuk Kim 1028e05df3b1SJaegeuk Kim lock_page(page); 10294ef51a8fSJaegeuk Kim if (unlikely(page->mapping != NODE_MAPPING(sbi))) { 1030afcb7ca0SJaegeuk Kim f2fs_put_page(page, 1); 1031afcb7ca0SJaegeuk Kim goto repeat; 1032afcb7ca0SJaegeuk Kim } 1033e0f56cb4SNamjae Jeon page_hit: 10346bacf52fSJaegeuk Kim if (unlikely(!PageUptodate(page))) { 1035e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 1036e05df3b1SJaegeuk Kim return ERR_PTR(-EIO); 1037e05df3b1SJaegeuk Kim } 1038e05df3b1SJaegeuk Kim return page; 1039e05df3b1SJaegeuk Kim } 1040e05df3b1SJaegeuk Kim 1041e05df3b1SJaegeuk Kim void sync_inode_page(struct dnode_of_data *dn) 1042e05df3b1SJaegeuk Kim { 1043e05df3b1SJaegeuk Kim if (IS_INODE(dn->node_page) || dn->inode_page == dn->node_page) { 1044e05df3b1SJaegeuk Kim update_inode(dn->inode, dn->node_page); 1045e05df3b1SJaegeuk Kim } else if (dn->inode_page) { 1046e05df3b1SJaegeuk Kim if (!dn->inode_page_locked) 1047e05df3b1SJaegeuk Kim lock_page(dn->inode_page); 1048e05df3b1SJaegeuk Kim update_inode(dn->inode, dn->inode_page); 1049e05df3b1SJaegeuk Kim if (!dn->inode_page_locked) 1050e05df3b1SJaegeuk Kim unlock_page(dn->inode_page); 1051e05df3b1SJaegeuk Kim } else { 105239936837SJaegeuk Kim update_inode_page(dn->inode); 1053e05df3b1SJaegeuk Kim } 1054e05df3b1SJaegeuk Kim } 1055e05df3b1SJaegeuk Kim 1056e05df3b1SJaegeuk Kim int sync_node_pages(struct f2fs_sb_info *sbi, nid_t ino, 1057e05df3b1SJaegeuk Kim struct writeback_control *wbc) 1058e05df3b1SJaegeuk Kim { 1059e05df3b1SJaegeuk Kim pgoff_t index, end; 1060e05df3b1SJaegeuk Kim struct pagevec pvec; 1061e05df3b1SJaegeuk Kim int step = ino ? 2 : 0; 1062e05df3b1SJaegeuk Kim int nwritten = 0, wrote = 0; 1063e05df3b1SJaegeuk Kim 1064e05df3b1SJaegeuk Kim pagevec_init(&pvec, 0); 1065e05df3b1SJaegeuk Kim 1066e05df3b1SJaegeuk Kim next_step: 1067e05df3b1SJaegeuk Kim index = 0; 1068e05df3b1SJaegeuk Kim end = LONG_MAX; 1069e05df3b1SJaegeuk Kim 1070e05df3b1SJaegeuk Kim while (index <= end) { 1071e05df3b1SJaegeuk Kim int i, nr_pages; 10724ef51a8fSJaegeuk Kim nr_pages = pagevec_lookup_tag(&pvec, NODE_MAPPING(sbi), &index, 1073e05df3b1SJaegeuk Kim PAGECACHE_TAG_DIRTY, 1074e05df3b1SJaegeuk Kim min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1); 1075e05df3b1SJaegeuk Kim if (nr_pages == 0) 1076e05df3b1SJaegeuk Kim break; 1077e05df3b1SJaegeuk Kim 1078e05df3b1SJaegeuk Kim for (i = 0; i < nr_pages; i++) { 1079e05df3b1SJaegeuk Kim struct page *page = pvec.pages[i]; 1080e05df3b1SJaegeuk Kim 1081e05df3b1SJaegeuk Kim /* 1082e05df3b1SJaegeuk Kim * flushing sequence with step: 1083e05df3b1SJaegeuk Kim * 0. indirect nodes 1084e05df3b1SJaegeuk Kim * 1. dentry dnodes 1085e05df3b1SJaegeuk Kim * 2. file dnodes 1086e05df3b1SJaegeuk Kim */ 1087e05df3b1SJaegeuk Kim if (step == 0 && IS_DNODE(page)) 1088e05df3b1SJaegeuk Kim continue; 1089e05df3b1SJaegeuk Kim if (step == 1 && (!IS_DNODE(page) || 1090e05df3b1SJaegeuk Kim is_cold_node(page))) 1091e05df3b1SJaegeuk Kim continue; 1092e05df3b1SJaegeuk Kim if (step == 2 && (!IS_DNODE(page) || 1093e05df3b1SJaegeuk Kim !is_cold_node(page))) 1094e05df3b1SJaegeuk Kim continue; 1095e05df3b1SJaegeuk Kim 1096e05df3b1SJaegeuk Kim /* 1097e05df3b1SJaegeuk Kim * If an fsync mode, 1098e05df3b1SJaegeuk Kim * we should not skip writing node pages. 1099e05df3b1SJaegeuk Kim */ 1100e05df3b1SJaegeuk Kim if (ino && ino_of_node(page) == ino) 1101e05df3b1SJaegeuk Kim lock_page(page); 1102e05df3b1SJaegeuk Kim else if (!trylock_page(page)) 1103e05df3b1SJaegeuk Kim continue; 1104e05df3b1SJaegeuk Kim 11054ef51a8fSJaegeuk Kim if (unlikely(page->mapping != NODE_MAPPING(sbi))) { 1106e05df3b1SJaegeuk Kim continue_unlock: 1107e05df3b1SJaegeuk Kim unlock_page(page); 1108e05df3b1SJaegeuk Kim continue; 1109e05df3b1SJaegeuk Kim } 1110e05df3b1SJaegeuk Kim if (ino && ino_of_node(page) != ino) 1111e05df3b1SJaegeuk Kim goto continue_unlock; 1112e05df3b1SJaegeuk Kim 1113e05df3b1SJaegeuk Kim if (!PageDirty(page)) { 1114e05df3b1SJaegeuk Kim /* someone wrote it for us */ 1115e05df3b1SJaegeuk Kim goto continue_unlock; 1116e05df3b1SJaegeuk Kim } 1117e05df3b1SJaegeuk Kim 1118e05df3b1SJaegeuk Kim if (!clear_page_dirty_for_io(page)) 1119e05df3b1SJaegeuk Kim goto continue_unlock; 1120e05df3b1SJaegeuk Kim 1121e05df3b1SJaegeuk Kim /* called by fsync() */ 1122e05df3b1SJaegeuk Kim if (ino && IS_DNODE(page)) { 1123e05df3b1SJaegeuk Kim int mark = !is_checkpointed_node(sbi, ino); 1124e05df3b1SJaegeuk Kim set_fsync_mark(page, 1); 1125e05df3b1SJaegeuk Kim if (IS_INODE(page)) 1126e05df3b1SJaegeuk Kim set_dentry_mark(page, mark); 1127e05df3b1SJaegeuk Kim nwritten++; 1128e05df3b1SJaegeuk Kim } else { 1129e05df3b1SJaegeuk Kim set_fsync_mark(page, 0); 1130e05df3b1SJaegeuk Kim set_dentry_mark(page, 0); 1131e05df3b1SJaegeuk Kim } 113252746519SJaegeuk Kim 113352746519SJaegeuk Kim if (NODE_MAPPING(sbi)->a_ops->writepage(page, wbc)) 113452746519SJaegeuk Kim unlock_page(page); 113552746519SJaegeuk Kim else 1136e05df3b1SJaegeuk Kim wrote++; 1137e05df3b1SJaegeuk Kim 1138e05df3b1SJaegeuk Kim if (--wbc->nr_to_write == 0) 1139e05df3b1SJaegeuk Kim break; 1140e05df3b1SJaegeuk Kim } 1141e05df3b1SJaegeuk Kim pagevec_release(&pvec); 1142e05df3b1SJaegeuk Kim cond_resched(); 1143e05df3b1SJaegeuk Kim 1144e05df3b1SJaegeuk Kim if (wbc->nr_to_write == 0) { 1145e05df3b1SJaegeuk Kim step = 2; 1146e05df3b1SJaegeuk Kim break; 1147e05df3b1SJaegeuk Kim } 1148e05df3b1SJaegeuk Kim } 1149e05df3b1SJaegeuk Kim 1150e05df3b1SJaegeuk Kim if (step < 2) { 1151e05df3b1SJaegeuk Kim step++; 1152e05df3b1SJaegeuk Kim goto next_step; 1153e05df3b1SJaegeuk Kim } 1154e05df3b1SJaegeuk Kim 1155e05df3b1SJaegeuk Kim if (wrote) 1156458e6197SJaegeuk Kim f2fs_submit_merged_bio(sbi, NODE, WRITE); 1157e05df3b1SJaegeuk Kim return nwritten; 1158e05df3b1SJaegeuk Kim } 1159e05df3b1SJaegeuk Kim 1160cfe58f9dSJaegeuk Kim int wait_on_node_pages_writeback(struct f2fs_sb_info *sbi, nid_t ino) 1161cfe58f9dSJaegeuk Kim { 1162cfe58f9dSJaegeuk Kim pgoff_t index = 0, end = LONG_MAX; 1163cfe58f9dSJaegeuk Kim struct pagevec pvec; 1164cfe58f9dSJaegeuk Kim int ret2 = 0, ret = 0; 1165cfe58f9dSJaegeuk Kim 1166cfe58f9dSJaegeuk Kim pagevec_init(&pvec, 0); 11674ef51a8fSJaegeuk Kim 11684ef51a8fSJaegeuk Kim while (index <= end) { 11694ef51a8fSJaegeuk Kim int i, nr_pages; 11704ef51a8fSJaegeuk Kim nr_pages = pagevec_lookup_tag(&pvec, NODE_MAPPING(sbi), &index, 1171cfe58f9dSJaegeuk Kim PAGECACHE_TAG_WRITEBACK, 11724ef51a8fSJaegeuk Kim min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1); 11734ef51a8fSJaegeuk Kim if (nr_pages == 0) 11744ef51a8fSJaegeuk Kim break; 1175cfe58f9dSJaegeuk Kim 1176cfe58f9dSJaegeuk Kim for (i = 0; i < nr_pages; i++) { 1177cfe58f9dSJaegeuk Kim struct page *page = pvec.pages[i]; 1178cfe58f9dSJaegeuk Kim 1179cfe58f9dSJaegeuk Kim /* until radix tree lookup accepts end_index */ 1180cfb271d4SChao Yu if (unlikely(page->index > end)) 1181cfe58f9dSJaegeuk Kim continue; 1182cfe58f9dSJaegeuk Kim 11834bf08ff6SChao Yu if (ino && ino_of_node(page) == ino) { 11843cb5ad15SJaegeuk Kim f2fs_wait_on_page_writeback(page, NODE); 1185cfe58f9dSJaegeuk Kim if (TestClearPageError(page)) 1186cfe58f9dSJaegeuk Kim ret = -EIO; 1187cfe58f9dSJaegeuk Kim } 11884bf08ff6SChao Yu } 1189cfe58f9dSJaegeuk Kim pagevec_release(&pvec); 1190cfe58f9dSJaegeuk Kim cond_resched(); 1191cfe58f9dSJaegeuk Kim } 1192cfe58f9dSJaegeuk Kim 11934ef51a8fSJaegeuk Kim if (unlikely(test_and_clear_bit(AS_ENOSPC, &NODE_MAPPING(sbi)->flags))) 1194cfe58f9dSJaegeuk Kim ret2 = -ENOSPC; 11954ef51a8fSJaegeuk Kim if (unlikely(test_and_clear_bit(AS_EIO, &NODE_MAPPING(sbi)->flags))) 1196cfe58f9dSJaegeuk Kim ret2 = -EIO; 1197cfe58f9dSJaegeuk Kim if (!ret) 1198cfe58f9dSJaegeuk Kim ret = ret2; 1199cfe58f9dSJaegeuk Kim return ret; 1200cfe58f9dSJaegeuk Kim } 1201cfe58f9dSJaegeuk Kim 1202e05df3b1SJaegeuk Kim static int f2fs_write_node_page(struct page *page, 1203e05df3b1SJaegeuk Kim struct writeback_control *wbc) 1204e05df3b1SJaegeuk Kim { 1205e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(page->mapping->host->i_sb); 1206e05df3b1SJaegeuk Kim nid_t nid; 1207e05df3b1SJaegeuk Kim block_t new_addr; 1208e05df3b1SJaegeuk Kim struct node_info ni; 1209fb5566daSJaegeuk Kim struct f2fs_io_info fio = { 1210fb5566daSJaegeuk Kim .type = NODE, 1211fb5566daSJaegeuk Kim .rw = (wbc->sync_mode == WB_SYNC_ALL) ? WRITE_SYNC : WRITE, 1212fb5566daSJaegeuk Kim }; 1213e05df3b1SJaegeuk Kim 1214ecda0de3SChao Yu trace_f2fs_writepage(page, NODE); 1215ecda0de3SChao Yu 1216cfb271d4SChao Yu if (unlikely(sbi->por_doing)) 121787a9bd26SJaegeuk Kim goto redirty_out; 121887a9bd26SJaegeuk Kim 12193cb5ad15SJaegeuk Kim f2fs_wait_on_page_writeback(page, NODE); 1220e05df3b1SJaegeuk Kim 1221e05df3b1SJaegeuk Kim /* get old block addr of this node page */ 1222e05df3b1SJaegeuk Kim nid = nid_of_node(page); 12235d56b671SJaegeuk Kim f2fs_bug_on(page->index != nid); 1224e05df3b1SJaegeuk Kim 1225e05df3b1SJaegeuk Kim get_node_info(sbi, nid, &ni); 1226e05df3b1SJaegeuk Kim 1227e05df3b1SJaegeuk Kim /* This page is already truncated */ 12286bacf52fSJaegeuk Kim if (unlikely(ni.blk_addr == NULL_ADDR)) { 122939936837SJaegeuk Kim dec_page_count(sbi, F2FS_DIRTY_NODES); 123039936837SJaegeuk Kim unlock_page(page); 123139936837SJaegeuk Kim return 0; 123239936837SJaegeuk Kim } 1233e05df3b1SJaegeuk Kim 123487a9bd26SJaegeuk Kim if (wbc->for_reclaim) 123587a9bd26SJaegeuk Kim goto redirty_out; 123608d8058bSJaegeuk Kim 1237b3582c68SChao Yu down_read(&sbi->node_write); 1238e05df3b1SJaegeuk Kim set_page_writeback(page); 1239fb5566daSJaegeuk Kim write_node_page(sbi, page, &fio, nid, ni.blk_addr, &new_addr); 1240479f40c4SJaegeuk Kim set_node_addr(sbi, &ni, new_addr, is_fsync_dnode(page)); 1241e05df3b1SJaegeuk Kim dec_page_count(sbi, F2FS_DIRTY_NODES); 1242b3582c68SChao Yu up_read(&sbi->node_write); 1243e05df3b1SJaegeuk Kim unlock_page(page); 1244e05df3b1SJaegeuk Kim return 0; 124587a9bd26SJaegeuk Kim 124687a9bd26SJaegeuk Kim redirty_out: 124776f60268SJaegeuk Kim redirty_page_for_writepage(wbc, page); 124887a9bd26SJaegeuk Kim return AOP_WRITEPAGE_ACTIVATE; 1249e05df3b1SJaegeuk Kim } 1250e05df3b1SJaegeuk Kim 1251e05df3b1SJaegeuk Kim static int f2fs_write_node_pages(struct address_space *mapping, 1252e05df3b1SJaegeuk Kim struct writeback_control *wbc) 1253e05df3b1SJaegeuk Kim { 1254e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(mapping->host->i_sb); 125550c8cdb3SJaegeuk Kim long diff; 1256e05df3b1SJaegeuk Kim 1257e5748434SChao Yu trace_f2fs_writepages(mapping->host, wbc, NODE); 1258e5748434SChao Yu 12594660f9c0SJaegeuk Kim /* balancing f2fs's metadata in background */ 12604660f9c0SJaegeuk Kim f2fs_balance_fs_bg(sbi); 1261e05df3b1SJaegeuk Kim 1262a7fdffbdSJaegeuk Kim /* collect a number of dirty node pages and write together */ 126387d6f890SJaegeuk Kim if (get_pages(sbi, F2FS_DIRTY_NODES) < nr_pages_to_skip(sbi, NODE)) 1264d3baf95dSJaegeuk Kim goto skip_write; 1265a7fdffbdSJaegeuk Kim 126650c8cdb3SJaegeuk Kim diff = nr_pages_to_write(sbi, NODE, wbc); 1267fb5566daSJaegeuk Kim wbc->sync_mode = WB_SYNC_NONE; 1268e05df3b1SJaegeuk Kim sync_node_pages(sbi, 0, wbc); 126950c8cdb3SJaegeuk Kim wbc->nr_to_write = max((long)0, wbc->nr_to_write - diff); 1270e05df3b1SJaegeuk Kim return 0; 1271d3baf95dSJaegeuk Kim 1272d3baf95dSJaegeuk Kim skip_write: 1273d3baf95dSJaegeuk Kim wbc->pages_skipped += get_pages(sbi, F2FS_DIRTY_NODES); 1274d3baf95dSJaegeuk Kim return 0; 1275e05df3b1SJaegeuk Kim } 1276e05df3b1SJaegeuk Kim 1277e05df3b1SJaegeuk Kim static int f2fs_set_node_page_dirty(struct page *page) 1278e05df3b1SJaegeuk Kim { 1279e05df3b1SJaegeuk Kim struct address_space *mapping = page->mapping; 1280e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(mapping->host->i_sb); 1281e05df3b1SJaegeuk Kim 128226c6b887SJaegeuk Kim trace_f2fs_set_page_dirty(page, NODE); 128326c6b887SJaegeuk Kim 1284e05df3b1SJaegeuk Kim SetPageUptodate(page); 1285e05df3b1SJaegeuk Kim if (!PageDirty(page)) { 1286e05df3b1SJaegeuk Kim __set_page_dirty_nobuffers(page); 1287e05df3b1SJaegeuk Kim inc_page_count(sbi, F2FS_DIRTY_NODES); 1288e05df3b1SJaegeuk Kim SetPagePrivate(page); 1289e05df3b1SJaegeuk Kim return 1; 1290e05df3b1SJaegeuk Kim } 1291e05df3b1SJaegeuk Kim return 0; 1292e05df3b1SJaegeuk Kim } 1293e05df3b1SJaegeuk Kim 1294d47992f8SLukas Czerner static void f2fs_invalidate_node_page(struct page *page, unsigned int offset, 1295d47992f8SLukas Czerner unsigned int length) 1296e05df3b1SJaegeuk Kim { 1297e05df3b1SJaegeuk Kim struct inode *inode = page->mapping->host; 1298e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); 1299e05df3b1SJaegeuk Kim if (PageDirty(page)) 1300e05df3b1SJaegeuk Kim dec_page_count(sbi, F2FS_DIRTY_NODES); 1301e05df3b1SJaegeuk Kim ClearPagePrivate(page); 1302e05df3b1SJaegeuk Kim } 1303e05df3b1SJaegeuk Kim 1304e05df3b1SJaegeuk Kim static int f2fs_release_node_page(struct page *page, gfp_t wait) 1305e05df3b1SJaegeuk Kim { 1306e05df3b1SJaegeuk Kim ClearPagePrivate(page); 1307c3850aa1SJaegeuk Kim return 1; 1308e05df3b1SJaegeuk Kim } 1309e05df3b1SJaegeuk Kim 13100a8165d7SJaegeuk Kim /* 1311e05df3b1SJaegeuk Kim * Structure of the f2fs node operations 1312e05df3b1SJaegeuk Kim */ 1313e05df3b1SJaegeuk Kim const struct address_space_operations f2fs_node_aops = { 1314e05df3b1SJaegeuk Kim .writepage = f2fs_write_node_page, 1315e05df3b1SJaegeuk Kim .writepages = f2fs_write_node_pages, 1316e05df3b1SJaegeuk Kim .set_page_dirty = f2fs_set_node_page_dirty, 1317e05df3b1SJaegeuk Kim .invalidatepage = f2fs_invalidate_node_page, 1318e05df3b1SJaegeuk Kim .releasepage = f2fs_release_node_page, 1319e05df3b1SJaegeuk Kim }; 1320e05df3b1SJaegeuk Kim 13218a7ed66aSJaegeuk Kim static struct free_nid *__lookup_free_nid_list(struct f2fs_nm_info *nm_i, 13228a7ed66aSJaegeuk Kim nid_t n) 1323e05df3b1SJaegeuk Kim { 13248a7ed66aSJaegeuk Kim return radix_tree_lookup(&nm_i->free_nid_root, n); 13253aa770a9SNamjae Jeon } 1326e05df3b1SJaegeuk Kim 13278a7ed66aSJaegeuk Kim static void __del_from_free_nid_list(struct f2fs_nm_info *nm_i, 13288a7ed66aSJaegeuk Kim struct free_nid *i) 1329e05df3b1SJaegeuk Kim { 1330e05df3b1SJaegeuk Kim list_del(&i->list); 13318a7ed66aSJaegeuk Kim radix_tree_delete(&nm_i->free_nid_root, i->nid); 1332e05df3b1SJaegeuk Kim } 1333e05df3b1SJaegeuk Kim 13346fb03f3aSJaegeuk Kim static int add_free_nid(struct f2fs_sb_info *sbi, nid_t nid, bool build) 1335e05df3b1SJaegeuk Kim { 13366fb03f3aSJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1337e05df3b1SJaegeuk Kim struct free_nid *i; 133859bbd474SJaegeuk Kim struct nat_entry *ne; 133959bbd474SJaegeuk Kim bool allocated = false; 1340e05df3b1SJaegeuk Kim 13416fb03f3aSJaegeuk Kim if (!available_free_memory(sbi, FREE_NIDS)) 134223d38844SHaicheng Li return -1; 13439198acebSJaegeuk Kim 13449198acebSJaegeuk Kim /* 0 nid should not be used */ 1345cfb271d4SChao Yu if (unlikely(nid == 0)) 13469198acebSJaegeuk Kim return 0; 134759bbd474SJaegeuk Kim 13487bd59381SGu Zheng if (build) { 134959bbd474SJaegeuk Kim /* do not add allocated nids */ 135059bbd474SJaegeuk Kim read_lock(&nm_i->nat_tree_lock); 135159bbd474SJaegeuk Kim ne = __lookup_nat_cache(nm_i, nid); 13528a7ed66aSJaegeuk Kim if (ne && 13538a7ed66aSJaegeuk Kim (!ne->checkpointed || nat_get_blkaddr(ne) != NULL_ADDR)) 135459bbd474SJaegeuk Kim allocated = true; 135559bbd474SJaegeuk Kim read_unlock(&nm_i->nat_tree_lock); 135659bbd474SJaegeuk Kim if (allocated) 135759bbd474SJaegeuk Kim return 0; 1358e05df3b1SJaegeuk Kim } 13597bd59381SGu Zheng 13607bd59381SGu Zheng i = f2fs_kmem_cache_alloc(free_nid_slab, GFP_NOFS); 1361e05df3b1SJaegeuk Kim i->nid = nid; 1362e05df3b1SJaegeuk Kim i->state = NID_NEW; 1363e05df3b1SJaegeuk Kim 1364e05df3b1SJaegeuk Kim spin_lock(&nm_i->free_nid_list_lock); 13658a7ed66aSJaegeuk Kim if (radix_tree_insert(&nm_i->free_nid_root, i->nid, i)) { 1366e05df3b1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1367e05df3b1SJaegeuk Kim kmem_cache_free(free_nid_slab, i); 1368e05df3b1SJaegeuk Kim return 0; 1369e05df3b1SJaegeuk Kim } 1370e05df3b1SJaegeuk Kim list_add_tail(&i->list, &nm_i->free_nid_list); 1371e05df3b1SJaegeuk Kim nm_i->fcnt++; 1372e05df3b1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1373e05df3b1SJaegeuk Kim return 1; 1374e05df3b1SJaegeuk Kim } 1375e05df3b1SJaegeuk Kim 1376e05df3b1SJaegeuk Kim static void remove_free_nid(struct f2fs_nm_info *nm_i, nid_t nid) 1377e05df3b1SJaegeuk Kim { 1378e05df3b1SJaegeuk Kim struct free_nid *i; 1379cf0ee0f0SChao Yu bool need_free = false; 1380cf0ee0f0SChao Yu 1381e05df3b1SJaegeuk Kim spin_lock(&nm_i->free_nid_list_lock); 13828a7ed66aSJaegeuk Kim i = __lookup_free_nid_list(nm_i, nid); 1383e05df3b1SJaegeuk Kim if (i && i->state == NID_NEW) { 13848a7ed66aSJaegeuk Kim __del_from_free_nid_list(nm_i, i); 1385e05df3b1SJaegeuk Kim nm_i->fcnt--; 1386cf0ee0f0SChao Yu need_free = true; 1387e05df3b1SJaegeuk Kim } 1388e05df3b1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1389cf0ee0f0SChao Yu 1390cf0ee0f0SChao Yu if (need_free) 1391cf0ee0f0SChao Yu kmem_cache_free(free_nid_slab, i); 1392e05df3b1SJaegeuk Kim } 1393e05df3b1SJaegeuk Kim 13946fb03f3aSJaegeuk Kim static void scan_nat_page(struct f2fs_sb_info *sbi, 1395e05df3b1SJaegeuk Kim struct page *nat_page, nid_t start_nid) 1396e05df3b1SJaegeuk Kim { 13976fb03f3aSJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1398e05df3b1SJaegeuk Kim struct f2fs_nat_block *nat_blk = page_address(nat_page); 1399e05df3b1SJaegeuk Kim block_t blk_addr; 1400e05df3b1SJaegeuk Kim int i; 1401e05df3b1SJaegeuk Kim 1402e05df3b1SJaegeuk Kim i = start_nid % NAT_ENTRY_PER_BLOCK; 1403e05df3b1SJaegeuk Kim 1404e05df3b1SJaegeuk Kim for (; i < NAT_ENTRY_PER_BLOCK; i++, start_nid++) { 140523d38844SHaicheng Li 1406cfb271d4SChao Yu if (unlikely(start_nid >= nm_i->max_nid)) 140704431c44SJaegeuk Kim break; 140823d38844SHaicheng Li 1409e05df3b1SJaegeuk Kim blk_addr = le32_to_cpu(nat_blk->entries[i].block_addr); 14105d56b671SJaegeuk Kim f2fs_bug_on(blk_addr == NEW_ADDR); 141123d38844SHaicheng Li if (blk_addr == NULL_ADDR) { 14126fb03f3aSJaegeuk Kim if (add_free_nid(sbi, start_nid, true) < 0) 141323d38844SHaicheng Li break; 141423d38844SHaicheng Li } 1415e05df3b1SJaegeuk Kim } 1416e05df3b1SJaegeuk Kim } 1417e05df3b1SJaegeuk Kim 1418e05df3b1SJaegeuk Kim static void build_free_nids(struct f2fs_sb_info *sbi) 1419e05df3b1SJaegeuk Kim { 1420e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1421e05df3b1SJaegeuk Kim struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); 1422e05df3b1SJaegeuk Kim struct f2fs_summary_block *sum = curseg->sum_blk; 14238760952dSHaicheng Li int i = 0; 142455008d84SJaegeuk Kim nid_t nid = nm_i->next_scan_nid; 1425e05df3b1SJaegeuk Kim 142655008d84SJaegeuk Kim /* Enough entries */ 142755008d84SJaegeuk Kim if (nm_i->fcnt > NAT_ENTRY_PER_BLOCK) 142855008d84SJaegeuk Kim return; 1429e05df3b1SJaegeuk Kim 143055008d84SJaegeuk Kim /* readahead nat pages to be scanned */ 1431662befdaSChao Yu ra_meta_pages(sbi, NAT_BLOCK_OFFSET(nid), FREE_NID_PAGES, META_NAT); 1432e05df3b1SJaegeuk Kim 1433e05df3b1SJaegeuk Kim while (1) { 1434e05df3b1SJaegeuk Kim struct page *page = get_current_nat_page(sbi, nid); 1435e05df3b1SJaegeuk Kim 14366fb03f3aSJaegeuk Kim scan_nat_page(sbi, page, nid); 1437e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 1438e05df3b1SJaegeuk Kim 1439e05df3b1SJaegeuk Kim nid += (NAT_ENTRY_PER_BLOCK - (nid % NAT_ENTRY_PER_BLOCK)); 1440cfb271d4SChao Yu if (unlikely(nid >= nm_i->max_nid)) 1441e05df3b1SJaegeuk Kim nid = 0; 144255008d84SJaegeuk Kim 144355008d84SJaegeuk Kim if (i++ == FREE_NID_PAGES) 1444e05df3b1SJaegeuk Kim break; 1445e05df3b1SJaegeuk Kim } 1446e05df3b1SJaegeuk Kim 144755008d84SJaegeuk Kim /* go to the next free nat pages to find free nids abundantly */ 144855008d84SJaegeuk Kim nm_i->next_scan_nid = nid; 1449e05df3b1SJaegeuk Kim 1450e05df3b1SJaegeuk Kim /* find free nids from current sum_pages */ 1451e05df3b1SJaegeuk Kim mutex_lock(&curseg->curseg_mutex); 1452e05df3b1SJaegeuk Kim for (i = 0; i < nats_in_cursum(sum); i++) { 1453e05df3b1SJaegeuk Kim block_t addr = le32_to_cpu(nat_in_journal(sum, i).block_addr); 1454e05df3b1SJaegeuk Kim nid = le32_to_cpu(nid_in_journal(sum, i)); 1455e05df3b1SJaegeuk Kim if (addr == NULL_ADDR) 14566fb03f3aSJaegeuk Kim add_free_nid(sbi, nid, true); 1457e05df3b1SJaegeuk Kim else 1458e05df3b1SJaegeuk Kim remove_free_nid(nm_i, nid); 1459e05df3b1SJaegeuk Kim } 1460e05df3b1SJaegeuk Kim mutex_unlock(&curseg->curseg_mutex); 1461e05df3b1SJaegeuk Kim } 1462e05df3b1SJaegeuk Kim 1463e05df3b1SJaegeuk Kim /* 1464e05df3b1SJaegeuk Kim * If this function returns success, caller can obtain a new nid 1465e05df3b1SJaegeuk Kim * from second parameter of this function. 1466e05df3b1SJaegeuk Kim * The returned nid could be used ino as well as nid when inode is created. 1467e05df3b1SJaegeuk Kim */ 1468e05df3b1SJaegeuk Kim bool alloc_nid(struct f2fs_sb_info *sbi, nid_t *nid) 1469e05df3b1SJaegeuk Kim { 1470e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1471e05df3b1SJaegeuk Kim struct free_nid *i = NULL; 1472e05df3b1SJaegeuk Kim retry: 14737ee0eeabSJaegeuk Kim if (unlikely(sbi->total_valid_node_count + 1 > nm_i->available_nids)) 1474e05df3b1SJaegeuk Kim return false; 1475e05df3b1SJaegeuk Kim 1476e05df3b1SJaegeuk Kim spin_lock(&nm_i->free_nid_list_lock); 1477e05df3b1SJaegeuk Kim 147855008d84SJaegeuk Kim /* We should not use stale free nids created by build_free_nids */ 1479f978f5a0SGu Zheng if (nm_i->fcnt && !on_build_free_nids(nm_i)) { 14805d56b671SJaegeuk Kim f2fs_bug_on(list_empty(&nm_i->free_nid_list)); 14812d7b822aSChao Yu list_for_each_entry(i, &nm_i->free_nid_list, list) 1482e05df3b1SJaegeuk Kim if (i->state == NID_NEW) 1483e05df3b1SJaegeuk Kim break; 1484e05df3b1SJaegeuk Kim 14855d56b671SJaegeuk Kim f2fs_bug_on(i->state != NID_NEW); 1486e05df3b1SJaegeuk Kim *nid = i->nid; 1487e05df3b1SJaegeuk Kim i->state = NID_ALLOC; 1488e05df3b1SJaegeuk Kim nm_i->fcnt--; 1489e05df3b1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1490e05df3b1SJaegeuk Kim return true; 1491e05df3b1SJaegeuk Kim } 149255008d84SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 149355008d84SJaegeuk Kim 149455008d84SJaegeuk Kim /* Let's scan nat pages and its caches to get free nids */ 149555008d84SJaegeuk Kim mutex_lock(&nm_i->build_lock); 149655008d84SJaegeuk Kim build_free_nids(sbi); 149755008d84SJaegeuk Kim mutex_unlock(&nm_i->build_lock); 149855008d84SJaegeuk Kim goto retry; 149955008d84SJaegeuk Kim } 1500e05df3b1SJaegeuk Kim 15010a8165d7SJaegeuk Kim /* 1502e05df3b1SJaegeuk Kim * alloc_nid() should be called prior to this function. 1503e05df3b1SJaegeuk Kim */ 1504e05df3b1SJaegeuk Kim void alloc_nid_done(struct f2fs_sb_info *sbi, nid_t nid) 1505e05df3b1SJaegeuk Kim { 1506e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1507e05df3b1SJaegeuk Kim struct free_nid *i; 1508e05df3b1SJaegeuk Kim 1509e05df3b1SJaegeuk Kim spin_lock(&nm_i->free_nid_list_lock); 15108a7ed66aSJaegeuk Kim i = __lookup_free_nid_list(nm_i, nid); 15115d56b671SJaegeuk Kim f2fs_bug_on(!i || i->state != NID_ALLOC); 15128a7ed66aSJaegeuk Kim __del_from_free_nid_list(nm_i, i); 1513e05df3b1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1514cf0ee0f0SChao Yu 1515cf0ee0f0SChao Yu kmem_cache_free(free_nid_slab, i); 1516e05df3b1SJaegeuk Kim } 1517e05df3b1SJaegeuk Kim 15180a8165d7SJaegeuk Kim /* 1519e05df3b1SJaegeuk Kim * alloc_nid() should be called prior to this function. 1520e05df3b1SJaegeuk Kim */ 1521e05df3b1SJaegeuk Kim void alloc_nid_failed(struct f2fs_sb_info *sbi, nid_t nid) 1522e05df3b1SJaegeuk Kim { 152349952fa1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 152449952fa1SJaegeuk Kim struct free_nid *i; 1525cf0ee0f0SChao Yu bool need_free = false; 152649952fa1SJaegeuk Kim 152765985d93SJaegeuk Kim if (!nid) 152865985d93SJaegeuk Kim return; 152965985d93SJaegeuk Kim 153049952fa1SJaegeuk Kim spin_lock(&nm_i->free_nid_list_lock); 15318a7ed66aSJaegeuk Kim i = __lookup_free_nid_list(nm_i, nid); 15325d56b671SJaegeuk Kim f2fs_bug_on(!i || i->state != NID_ALLOC); 15336fb03f3aSJaegeuk Kim if (!available_free_memory(sbi, FREE_NIDS)) { 15348a7ed66aSJaegeuk Kim __del_from_free_nid_list(nm_i, i); 1535cf0ee0f0SChao Yu need_free = true; 153695630cbaSHaicheng Li } else { 153749952fa1SJaegeuk Kim i->state = NID_NEW; 153849952fa1SJaegeuk Kim nm_i->fcnt++; 153995630cbaSHaicheng Li } 154049952fa1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1541cf0ee0f0SChao Yu 1542cf0ee0f0SChao Yu if (need_free) 1543cf0ee0f0SChao Yu kmem_cache_free(free_nid_slab, i); 1544e05df3b1SJaegeuk Kim } 1545e05df3b1SJaegeuk Kim 1546e05df3b1SJaegeuk Kim void recover_node_page(struct f2fs_sb_info *sbi, struct page *page, 1547e05df3b1SJaegeuk Kim struct f2fs_summary *sum, struct node_info *ni, 1548e05df3b1SJaegeuk Kim block_t new_blkaddr) 1549e05df3b1SJaegeuk Kim { 1550e05df3b1SJaegeuk Kim rewrite_node_page(sbi, page, sum, ni->blk_addr, new_blkaddr); 1551479f40c4SJaegeuk Kim set_node_addr(sbi, ni, new_blkaddr, false); 1552e05df3b1SJaegeuk Kim clear_node_page_dirty(page); 1553e05df3b1SJaegeuk Kim } 1554e05df3b1SJaegeuk Kim 155570cfed88SChao Yu void recover_inline_xattr(struct inode *inode, struct page *page) 155628cdce04SChao Yu { 155728cdce04SChao Yu struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); 155828cdce04SChao Yu void *src_addr, *dst_addr; 155928cdce04SChao Yu size_t inline_size; 156028cdce04SChao Yu struct page *ipage; 156128cdce04SChao Yu struct f2fs_inode *ri; 156228cdce04SChao Yu 156328cdce04SChao Yu ipage = get_node_page(sbi, inode->i_ino); 156428cdce04SChao Yu f2fs_bug_on(IS_ERR(ipage)); 156528cdce04SChao Yu 1566e3b4d43fSJaegeuk Kim ri = F2FS_INODE(page); 1567e3b4d43fSJaegeuk Kim if (!(ri->i_inline & F2FS_INLINE_XATTR)) { 1568e3b4d43fSJaegeuk Kim clear_inode_flag(F2FS_I(inode), FI_INLINE_XATTR); 1569e3b4d43fSJaegeuk Kim goto update_inode; 1570e3b4d43fSJaegeuk Kim } 1571e3b4d43fSJaegeuk Kim 157228cdce04SChao Yu dst_addr = inline_xattr_addr(ipage); 157328cdce04SChao Yu src_addr = inline_xattr_addr(page); 157428cdce04SChao Yu inline_size = inline_xattr_size(inode); 157528cdce04SChao Yu 157654b591dfSJaegeuk Kim f2fs_wait_on_page_writeback(ipage, NODE); 157728cdce04SChao Yu memcpy(dst_addr, src_addr, inline_size); 1578e3b4d43fSJaegeuk Kim update_inode: 157928cdce04SChao Yu update_inode(inode, ipage); 158028cdce04SChao Yu f2fs_put_page(ipage, 1); 158128cdce04SChao Yu } 158228cdce04SChao Yu 15831c35a90eSJaegeuk Kim void recover_xattr_data(struct inode *inode, struct page *page, block_t blkaddr) 1584abb2366cSJaegeuk Kim { 1585abb2366cSJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); 1586abb2366cSJaegeuk Kim nid_t prev_xnid = F2FS_I(inode)->i_xattr_nid; 1587abb2366cSJaegeuk Kim nid_t new_xnid = nid_of_node(page); 1588abb2366cSJaegeuk Kim struct node_info ni; 1589abb2366cSJaegeuk Kim 1590abb2366cSJaegeuk Kim /* 1: invalidate the previous xattr nid */ 1591abb2366cSJaegeuk Kim if (!prev_xnid) 1592abb2366cSJaegeuk Kim goto recover_xnid; 1593abb2366cSJaegeuk Kim 1594abb2366cSJaegeuk Kim /* Deallocate node address */ 1595abb2366cSJaegeuk Kim get_node_info(sbi, prev_xnid, &ni); 1596abb2366cSJaegeuk Kim f2fs_bug_on(ni.blk_addr == NULL_ADDR); 1597abb2366cSJaegeuk Kim invalidate_blocks(sbi, ni.blk_addr); 1598abb2366cSJaegeuk Kim dec_valid_node_count(sbi, inode); 1599479f40c4SJaegeuk Kim set_node_addr(sbi, &ni, NULL_ADDR, false); 1600abb2366cSJaegeuk Kim 1601abb2366cSJaegeuk Kim recover_xnid: 1602abb2366cSJaegeuk Kim /* 2: allocate new xattr nid */ 1603abb2366cSJaegeuk Kim if (unlikely(!inc_valid_node_count(sbi, inode))) 1604abb2366cSJaegeuk Kim f2fs_bug_on(1); 1605abb2366cSJaegeuk Kim 1606abb2366cSJaegeuk Kim remove_free_nid(NM_I(sbi), new_xnid); 1607abb2366cSJaegeuk Kim get_node_info(sbi, new_xnid, &ni); 1608abb2366cSJaegeuk Kim ni.ino = inode->i_ino; 1609479f40c4SJaegeuk Kim set_node_addr(sbi, &ni, NEW_ADDR, false); 1610abb2366cSJaegeuk Kim F2FS_I(inode)->i_xattr_nid = new_xnid; 1611abb2366cSJaegeuk Kim 1612abb2366cSJaegeuk Kim /* 3: update xattr blkaddr */ 1613abb2366cSJaegeuk Kim refresh_sit_entry(sbi, NEW_ADDR, blkaddr); 1614479f40c4SJaegeuk Kim set_node_addr(sbi, &ni, blkaddr, false); 1615abb2366cSJaegeuk Kim 1616abb2366cSJaegeuk Kim update_inode_page(inode); 1617abb2366cSJaegeuk Kim } 1618abb2366cSJaegeuk Kim 1619e05df3b1SJaegeuk Kim int recover_inode_page(struct f2fs_sb_info *sbi, struct page *page) 1620e05df3b1SJaegeuk Kim { 162158bfaf44SJaegeuk Kim struct f2fs_inode *src, *dst; 1622e05df3b1SJaegeuk Kim nid_t ino = ino_of_node(page); 1623e05df3b1SJaegeuk Kim struct node_info old_ni, new_ni; 1624e05df3b1SJaegeuk Kim struct page *ipage; 1625e05df3b1SJaegeuk Kim 1626e8271fa3SJaegeuk Kim get_node_info(sbi, ino, &old_ni); 1627e8271fa3SJaegeuk Kim 1628e8271fa3SJaegeuk Kim if (unlikely(old_ni.blk_addr != NULL_ADDR)) 1629e8271fa3SJaegeuk Kim return -EINVAL; 1630e8271fa3SJaegeuk Kim 16314ef51a8fSJaegeuk Kim ipage = grab_cache_page(NODE_MAPPING(sbi), ino); 1632e05df3b1SJaegeuk Kim if (!ipage) 1633e05df3b1SJaegeuk Kim return -ENOMEM; 1634e05df3b1SJaegeuk Kim 1635e05df3b1SJaegeuk Kim /* Should not use this inode from free nid list */ 1636e05df3b1SJaegeuk Kim remove_free_nid(NM_I(sbi), ino); 1637e05df3b1SJaegeuk Kim 1638e05df3b1SJaegeuk Kim SetPageUptodate(ipage); 1639e05df3b1SJaegeuk Kim fill_node_footer(ipage, ino, ino, 0, true); 1640e05df3b1SJaegeuk Kim 164158bfaf44SJaegeuk Kim src = F2FS_INODE(page); 164258bfaf44SJaegeuk Kim dst = F2FS_INODE(ipage); 1643e05df3b1SJaegeuk Kim 164458bfaf44SJaegeuk Kim memcpy(dst, src, (unsigned long)&src->i_ext - (unsigned long)src); 164558bfaf44SJaegeuk Kim dst->i_size = 0; 164658bfaf44SJaegeuk Kim dst->i_blocks = cpu_to_le64(1); 164758bfaf44SJaegeuk Kim dst->i_links = cpu_to_le32(1); 164858bfaf44SJaegeuk Kim dst->i_xattr_nid = 0; 1649617deb8cSJaegeuk Kim dst->i_inline = src->i_inline & F2FS_INLINE_XATTR; 1650e05df3b1SJaegeuk Kim 1651e05df3b1SJaegeuk Kim new_ni = old_ni; 1652e05df3b1SJaegeuk Kim new_ni.ino = ino; 1653e05df3b1SJaegeuk Kim 1654cfb271d4SChao Yu if (unlikely(!inc_valid_node_count(sbi, NULL))) 165565e5cd0aSJaegeuk Kim WARN_ON(1); 1656479f40c4SJaegeuk Kim set_node_addr(sbi, &new_ni, NEW_ADDR, false); 1657e05df3b1SJaegeuk Kim inc_valid_inode_count(sbi); 1658617deb8cSJaegeuk Kim set_page_dirty(ipage); 1659e05df3b1SJaegeuk Kim f2fs_put_page(ipage, 1); 1660e05df3b1SJaegeuk Kim return 0; 1661e05df3b1SJaegeuk Kim } 1662e05df3b1SJaegeuk Kim 16639af0ff1cSChao Yu /* 16649af0ff1cSChao Yu * ra_sum_pages() merge contiguous pages into one bio and submit. 1665e1c42045Sarter97 * these pre-read pages are allocated in bd_inode's mapping tree. 16669af0ff1cSChao Yu */ 1667bac4eef6SChao Yu static int ra_sum_pages(struct f2fs_sb_info *sbi, struct page **pages, 16689af0ff1cSChao Yu int start, int nrpages) 16699af0ff1cSChao Yu { 1670bac4eef6SChao Yu struct inode *inode = sbi->sb->s_bdev->bd_inode; 1671bac4eef6SChao Yu struct address_space *mapping = inode->i_mapping; 1672bac4eef6SChao Yu int i, page_idx = start; 1673458e6197SJaegeuk Kim struct f2fs_io_info fio = { 1674458e6197SJaegeuk Kim .type = META, 16757e8f2308SGu Zheng .rw = READ_SYNC | REQ_META | REQ_PRIO 1676458e6197SJaegeuk Kim }; 16779af0ff1cSChao Yu 1678bac4eef6SChao Yu for (i = 0; page_idx < start + nrpages; page_idx++, i++) { 1679bac4eef6SChao Yu /* alloc page in bd_inode for reading node summary info */ 1680bac4eef6SChao Yu pages[i] = grab_cache_page(mapping, page_idx); 1681bac4eef6SChao Yu if (!pages[i]) 1682d653788aSGu Zheng break; 1683bac4eef6SChao Yu f2fs_submit_page_mbio(sbi, pages[i], page_idx, &fio); 16849af0ff1cSChao Yu } 16859af0ff1cSChao Yu 1686458e6197SJaegeuk Kim f2fs_submit_merged_bio(sbi, META, READ); 1687bac4eef6SChao Yu return i; 16889af0ff1cSChao Yu } 16899af0ff1cSChao Yu 1690e05df3b1SJaegeuk Kim int restore_node_summary(struct f2fs_sb_info *sbi, 1691e05df3b1SJaegeuk Kim unsigned int segno, struct f2fs_summary_block *sum) 1692e05df3b1SJaegeuk Kim { 1693e05df3b1SJaegeuk Kim struct f2fs_node *rn; 1694e05df3b1SJaegeuk Kim struct f2fs_summary *sum_entry; 1695bac4eef6SChao Yu struct inode *inode = sbi->sb->s_bdev->bd_inode; 1696e05df3b1SJaegeuk Kim block_t addr; 16979af0ff1cSChao Yu int bio_blocks = MAX_BIO_BLOCKS(max_hw_blocks(sbi)); 1698bac4eef6SChao Yu struct page *pages[bio_blocks]; 1699bac4eef6SChao Yu int i, idx, last_offset, nrpages, err = 0; 1700e05df3b1SJaegeuk Kim 1701e05df3b1SJaegeuk Kim /* scan the node segment */ 1702e05df3b1SJaegeuk Kim last_offset = sbi->blocks_per_seg; 1703e05df3b1SJaegeuk Kim addr = START_BLOCK(sbi, segno); 1704e05df3b1SJaegeuk Kim sum_entry = &sum->entries[0]; 1705e05df3b1SJaegeuk Kim 1706d653788aSGu Zheng for (i = 0; !err && i < last_offset; i += nrpages, addr += nrpages) { 17079af0ff1cSChao Yu nrpages = min(last_offset - i, bio_blocks); 1708393ff91fSJaegeuk Kim 17099af0ff1cSChao Yu /* readahead node pages */ 1710bac4eef6SChao Yu nrpages = ra_sum_pages(sbi, pages, addr, nrpages); 1711d653788aSGu Zheng if (!nrpages) 1712d653788aSGu Zheng return -ENOMEM; 17139af0ff1cSChao Yu 1714bac4eef6SChao Yu for (idx = 0; idx < nrpages; idx++) { 1715d653788aSGu Zheng if (err) 1716d653788aSGu Zheng goto skip; 1717393ff91fSJaegeuk Kim 1718bac4eef6SChao Yu lock_page(pages[idx]); 1719bac4eef6SChao Yu if (unlikely(!PageUptodate(pages[idx]))) { 17206bacf52fSJaegeuk Kim err = -EIO; 17216bacf52fSJaegeuk Kim } else { 1722bac4eef6SChao Yu rn = F2FS_NODE(pages[idx]); 1723393ff91fSJaegeuk Kim sum_entry->nid = rn->footer.nid; 1724393ff91fSJaegeuk Kim sum_entry->version = 0; 1725393ff91fSJaegeuk Kim sum_entry->ofs_in_node = 0; 17269af0ff1cSChao Yu sum_entry++; 1727e05df3b1SJaegeuk Kim } 1728bac4eef6SChao Yu unlock_page(pages[idx]); 1729d653788aSGu Zheng skip: 1730bac4eef6SChao Yu page_cache_release(pages[idx]); 17319af0ff1cSChao Yu } 1732bac4eef6SChao Yu 1733bac4eef6SChao Yu invalidate_mapping_pages(inode->i_mapping, addr, 1734bac4eef6SChao Yu addr + nrpages); 17359af0ff1cSChao Yu } 17369af0ff1cSChao Yu return err; 1737e05df3b1SJaegeuk Kim } 1738e05df3b1SJaegeuk Kim 1739aec71382SChao Yu static struct nat_entry_set *grab_nat_entry_set(void) 1740aec71382SChao Yu { 1741aec71382SChao Yu struct nat_entry_set *nes = 1742aec71382SChao Yu f2fs_kmem_cache_alloc(nat_entry_set_slab, GFP_ATOMIC); 1743aec71382SChao Yu 1744aec71382SChao Yu nes->entry_cnt = 0; 1745aec71382SChao Yu INIT_LIST_HEAD(&nes->set_list); 1746aec71382SChao Yu INIT_LIST_HEAD(&nes->entry_list); 1747aec71382SChao Yu return nes; 1748aec71382SChao Yu } 1749aec71382SChao Yu 1750aec71382SChao Yu static void release_nat_entry_set(struct nat_entry_set *nes, 1751aec71382SChao Yu struct f2fs_nm_info *nm_i) 1752aec71382SChao Yu { 1753aec71382SChao Yu f2fs_bug_on(!list_empty(&nes->entry_list)); 1754aec71382SChao Yu 1755aec71382SChao Yu nm_i->dirty_nat_cnt -= nes->entry_cnt; 1756aec71382SChao Yu list_del(&nes->set_list); 1757aec71382SChao Yu kmem_cache_free(nat_entry_set_slab, nes); 1758aec71382SChao Yu } 1759aec71382SChao Yu 1760aec71382SChao Yu static void adjust_nat_entry_set(struct nat_entry_set *nes, 1761aec71382SChao Yu struct list_head *head) 1762aec71382SChao Yu { 1763aec71382SChao Yu struct nat_entry_set *next = nes; 1764aec71382SChao Yu 1765aec71382SChao Yu if (list_is_last(&nes->set_list, head)) 1766aec71382SChao Yu return; 1767aec71382SChao Yu 1768aec71382SChao Yu list_for_each_entry_continue(next, head, set_list) 1769aec71382SChao Yu if (nes->entry_cnt <= next->entry_cnt) 1770aec71382SChao Yu break; 1771aec71382SChao Yu 1772aec71382SChao Yu list_move_tail(&nes->set_list, &next->set_list); 1773aec71382SChao Yu } 1774aec71382SChao Yu 1775aec71382SChao Yu static void add_nat_entry(struct nat_entry *ne, struct list_head *head) 1776aec71382SChao Yu { 1777aec71382SChao Yu struct nat_entry_set *nes; 1778aec71382SChao Yu nid_t start_nid = START_NID(ne->ni.nid); 1779aec71382SChao Yu 1780aec71382SChao Yu list_for_each_entry(nes, head, set_list) { 1781aec71382SChao Yu if (nes->start_nid == start_nid) { 1782aec71382SChao Yu list_move_tail(&ne->list, &nes->entry_list); 1783aec71382SChao Yu nes->entry_cnt++; 1784aec71382SChao Yu adjust_nat_entry_set(nes, head); 1785aec71382SChao Yu return; 1786aec71382SChao Yu } 1787aec71382SChao Yu } 1788aec71382SChao Yu 1789aec71382SChao Yu nes = grab_nat_entry_set(); 1790aec71382SChao Yu 1791aec71382SChao Yu nes->start_nid = start_nid; 1792aec71382SChao Yu list_move_tail(&ne->list, &nes->entry_list); 1793aec71382SChao Yu nes->entry_cnt++; 1794aec71382SChao Yu list_add(&nes->set_list, head); 1795aec71382SChao Yu } 1796aec71382SChao Yu 1797aec71382SChao Yu static void merge_nats_in_set(struct f2fs_sb_info *sbi) 1798aec71382SChao Yu { 1799aec71382SChao Yu struct f2fs_nm_info *nm_i = NM_I(sbi); 1800aec71382SChao Yu struct list_head *dirty_list = &nm_i->dirty_nat_entries; 1801aec71382SChao Yu struct list_head *set_list = &nm_i->nat_entry_set; 1802aec71382SChao Yu struct nat_entry *ne, *tmp; 1803aec71382SChao Yu 1804aec71382SChao Yu write_lock(&nm_i->nat_tree_lock); 1805aec71382SChao Yu list_for_each_entry_safe(ne, tmp, dirty_list, list) { 1806aec71382SChao Yu if (nat_get_blkaddr(ne) == NEW_ADDR) 1807aec71382SChao Yu continue; 1808aec71382SChao Yu add_nat_entry(ne, set_list); 1809aec71382SChao Yu nm_i->dirty_nat_cnt++; 1810aec71382SChao Yu } 1811aec71382SChao Yu write_unlock(&nm_i->nat_tree_lock); 1812aec71382SChao Yu } 1813aec71382SChao Yu 1814aec71382SChao Yu static bool __has_cursum_space(struct f2fs_summary_block *sum, int size) 1815aec71382SChao Yu { 1816aec71382SChao Yu if (nats_in_cursum(sum) + size <= NAT_JOURNAL_ENTRIES) 1817aec71382SChao Yu return true; 1818aec71382SChao Yu else 1819aec71382SChao Yu return false; 1820aec71382SChao Yu } 1821aec71382SChao Yu 1822aec71382SChao Yu static void remove_nats_in_journal(struct f2fs_sb_info *sbi) 1823e05df3b1SJaegeuk Kim { 1824e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1825e05df3b1SJaegeuk Kim struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); 1826e05df3b1SJaegeuk Kim struct f2fs_summary_block *sum = curseg->sum_blk; 1827e05df3b1SJaegeuk Kim int i; 1828e05df3b1SJaegeuk Kim 1829e05df3b1SJaegeuk Kim mutex_lock(&curseg->curseg_mutex); 1830e05df3b1SJaegeuk Kim for (i = 0; i < nats_in_cursum(sum); i++) { 1831e05df3b1SJaegeuk Kim struct nat_entry *ne; 1832e05df3b1SJaegeuk Kim struct f2fs_nat_entry raw_ne; 1833e05df3b1SJaegeuk Kim nid_t nid = le32_to_cpu(nid_in_journal(sum, i)); 1834e05df3b1SJaegeuk Kim 1835e05df3b1SJaegeuk Kim raw_ne = nat_in_journal(sum, i); 1836e05df3b1SJaegeuk Kim retry: 1837e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 1838e05df3b1SJaegeuk Kim ne = __lookup_nat_cache(nm_i, nid); 1839aec71382SChao Yu if (ne) 1840aec71382SChao Yu goto found; 1841aec71382SChao Yu 1842e05df3b1SJaegeuk Kim ne = grab_nat_entry(nm_i, nid); 1843e05df3b1SJaegeuk Kim if (!ne) { 1844e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 1845e05df3b1SJaegeuk Kim goto retry; 1846e05df3b1SJaegeuk Kim } 184794dac22eSChao Yu node_info_from_raw_nat(&ne->ni, &raw_ne); 1848aec71382SChao Yu found: 1849e05df3b1SJaegeuk Kim __set_nat_cache_dirty(nm_i, ne); 1850e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 1851e05df3b1SJaegeuk Kim } 1852e05df3b1SJaegeuk Kim update_nats_in_cursum(sum, -i); 1853e05df3b1SJaegeuk Kim mutex_unlock(&curseg->curseg_mutex); 1854e05df3b1SJaegeuk Kim } 1855e05df3b1SJaegeuk Kim 18560a8165d7SJaegeuk Kim /* 1857e05df3b1SJaegeuk Kim * This function is called during the checkpointing process. 1858e05df3b1SJaegeuk Kim */ 1859e05df3b1SJaegeuk Kim void flush_nat_entries(struct f2fs_sb_info *sbi) 1860e05df3b1SJaegeuk Kim { 1861e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1862e05df3b1SJaegeuk Kim struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); 1863e05df3b1SJaegeuk Kim struct f2fs_summary_block *sum = curseg->sum_blk; 1864aec71382SChao Yu struct nat_entry_set *nes, *tmp; 1865aec71382SChao Yu struct list_head *head = &nm_i->nat_entry_set; 1866aec71382SChao Yu bool to_journal = true; 1867e05df3b1SJaegeuk Kim 1868aec71382SChao Yu /* merge nat entries of dirty list to nat entry set temporarily */ 1869aec71382SChao Yu merge_nats_in_set(sbi); 1870e05df3b1SJaegeuk Kim 1871e05df3b1SJaegeuk Kim /* 1872aec71382SChao Yu * if there are no enough space in journal to store dirty nat 1873aec71382SChao Yu * entries, remove all entries from journal and merge them 1874aec71382SChao Yu * into nat entry set. 1875e05df3b1SJaegeuk Kim */ 1876aec71382SChao Yu if (!__has_cursum_space(sum, nm_i->dirty_nat_cnt)) { 1877aec71382SChao Yu remove_nats_in_journal(sbi); 1878aec71382SChao Yu 1879aec71382SChao Yu /* 1880aec71382SChao Yu * merge nat entries of dirty list to nat entry set temporarily 1881aec71382SChao Yu */ 1882aec71382SChao Yu merge_nats_in_set(sbi); 1883aec71382SChao Yu } 1884aec71382SChao Yu 1885aec71382SChao Yu if (!nm_i->dirty_nat_cnt) 1886aec71382SChao Yu return; 1887aec71382SChao Yu 1888aec71382SChao Yu /* 1889aec71382SChao Yu * there are two steps to flush nat entries: 1890aec71382SChao Yu * #1, flush nat entries to journal in current hot data summary block. 1891aec71382SChao Yu * #2, flush nat entries to nat page. 1892aec71382SChao Yu */ 1893aec71382SChao Yu list_for_each_entry_safe(nes, tmp, head, set_list) { 1894aec71382SChao Yu struct f2fs_nat_block *nat_blk; 1895aec71382SChao Yu struct nat_entry *ne, *cur; 1896aec71382SChao Yu struct page *page; 1897aec71382SChao Yu nid_t start_nid = nes->start_nid; 1898aec71382SChao Yu 1899aec71382SChao Yu if (to_journal && !__has_cursum_space(sum, nes->entry_cnt)) 1900aec71382SChao Yu to_journal = false; 1901aec71382SChao Yu 1902aec71382SChao Yu if (to_journal) { 1903aec71382SChao Yu mutex_lock(&curseg->curseg_mutex); 1904aec71382SChao Yu } else { 1905e05df3b1SJaegeuk Kim page = get_next_nat_page(sbi, start_nid); 1906e05df3b1SJaegeuk Kim nat_blk = page_address(page); 19075d56b671SJaegeuk Kim f2fs_bug_on(!nat_blk); 1908e05df3b1SJaegeuk Kim } 1909e05df3b1SJaegeuk Kim 1910aec71382SChao Yu /* flush dirty nats in nat entry set */ 1911aec71382SChao Yu list_for_each_entry_safe(ne, cur, &nes->entry_list, list) { 1912aec71382SChao Yu struct f2fs_nat_entry *raw_ne; 1913aec71382SChao Yu nid_t nid = nat_get_nid(ne); 1914aec71382SChao Yu int offset; 1915aec71382SChao Yu 1916aec71382SChao Yu if (to_journal) { 1917aec71382SChao Yu offset = lookup_journal_in_cursum(sum, 1918aec71382SChao Yu NAT_JOURNAL, nid, 1); 1919aec71382SChao Yu f2fs_bug_on(offset < 0); 1920aec71382SChao Yu raw_ne = &nat_in_journal(sum, offset); 1921aec71382SChao Yu nid_in_journal(sum, offset) = cpu_to_le32(nid); 1922aec71382SChao Yu } else { 1923aec71382SChao Yu raw_ne = &nat_blk->entries[nid - start_nid]; 1924aec71382SChao Yu } 1925aec71382SChao Yu raw_nat_from_node_info(raw_ne, &ne->ni); 1926aec71382SChao Yu 1927fa372417SJaegeuk Kim if (nat_get_blkaddr(ne) == NULL_ADDR && 19286fb03f3aSJaegeuk Kim add_free_nid(sbi, nid, false) <= 0) { 1929e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 1930e05df3b1SJaegeuk Kim __del_from_nat_cache(nm_i, ne); 1931e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 1932e05df3b1SJaegeuk Kim } else { 1933e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 1934e05df3b1SJaegeuk Kim __clear_nat_cache_dirty(nm_i, ne); 1935e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 1936e05df3b1SJaegeuk Kim } 1937e05df3b1SJaegeuk Kim } 1938aec71382SChao Yu 1939aec71382SChao Yu if (to_journal) 1940e05df3b1SJaegeuk Kim mutex_unlock(&curseg->curseg_mutex); 1941aec71382SChao Yu else 1942e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 1943aec71382SChao Yu 1944aec71382SChao Yu release_nat_entry_set(nes, nm_i); 1945aec71382SChao Yu } 1946aec71382SChao Yu 1947aec71382SChao Yu f2fs_bug_on(!list_empty(head)); 1948aec71382SChao Yu f2fs_bug_on(nm_i->dirty_nat_cnt); 1949e05df3b1SJaegeuk Kim } 1950e05df3b1SJaegeuk Kim 1951e05df3b1SJaegeuk Kim static int init_node_manager(struct f2fs_sb_info *sbi) 1952e05df3b1SJaegeuk Kim { 1953e05df3b1SJaegeuk Kim struct f2fs_super_block *sb_raw = F2FS_RAW_SUPER(sbi); 1954e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1955e05df3b1SJaegeuk Kim unsigned char *version_bitmap; 1956e05df3b1SJaegeuk Kim unsigned int nat_segs, nat_blocks; 1957e05df3b1SJaegeuk Kim 1958e05df3b1SJaegeuk Kim nm_i->nat_blkaddr = le32_to_cpu(sb_raw->nat_blkaddr); 1959e05df3b1SJaegeuk Kim 1960e05df3b1SJaegeuk Kim /* segment_count_nat includes pair segment so divide to 2. */ 1961e05df3b1SJaegeuk Kim nat_segs = le32_to_cpu(sb_raw->segment_count_nat) >> 1; 1962e05df3b1SJaegeuk Kim nat_blocks = nat_segs << le32_to_cpu(sb_raw->log_blocks_per_seg); 1963b63da15eSJaegeuk Kim 19647ee0eeabSJaegeuk Kim nm_i->max_nid = NAT_ENTRY_PER_BLOCK * nat_blocks; 19657ee0eeabSJaegeuk Kim 1966b63da15eSJaegeuk Kim /* not used nids: 0, node, meta, (and root counted as valid node) */ 19677ee0eeabSJaegeuk Kim nm_i->available_nids = nm_i->max_nid - 3; 1968e05df3b1SJaegeuk Kim nm_i->fcnt = 0; 1969e05df3b1SJaegeuk Kim nm_i->nat_cnt = 0; 1970cdfc41c1SJaegeuk Kim nm_i->ram_thresh = DEF_RAM_THRESHOLD; 1971e05df3b1SJaegeuk Kim 19728a7ed66aSJaegeuk Kim INIT_RADIX_TREE(&nm_i->free_nid_root, GFP_ATOMIC); 1973e05df3b1SJaegeuk Kim INIT_LIST_HEAD(&nm_i->free_nid_list); 1974e05df3b1SJaegeuk Kim INIT_RADIX_TREE(&nm_i->nat_root, GFP_ATOMIC); 1975e05df3b1SJaegeuk Kim INIT_LIST_HEAD(&nm_i->nat_entries); 1976e05df3b1SJaegeuk Kim INIT_LIST_HEAD(&nm_i->dirty_nat_entries); 1977aec71382SChao Yu INIT_LIST_HEAD(&nm_i->nat_entry_set); 1978e05df3b1SJaegeuk Kim 1979e05df3b1SJaegeuk Kim mutex_init(&nm_i->build_lock); 1980e05df3b1SJaegeuk Kim spin_lock_init(&nm_i->free_nid_list_lock); 1981e05df3b1SJaegeuk Kim rwlock_init(&nm_i->nat_tree_lock); 1982e05df3b1SJaegeuk Kim 1983e05df3b1SJaegeuk Kim nm_i->next_scan_nid = le32_to_cpu(sbi->ckpt->next_free_nid); 198479b5793bSAlexandru Gheorghiu nm_i->bitmap_size = __bitmap_size(sbi, NAT_BITMAP); 1985e05df3b1SJaegeuk Kim version_bitmap = __bitmap_ptr(sbi, NAT_BITMAP); 1986e05df3b1SJaegeuk Kim if (!version_bitmap) 1987e05df3b1SJaegeuk Kim return -EFAULT; 1988e05df3b1SJaegeuk Kim 198979b5793bSAlexandru Gheorghiu nm_i->nat_bitmap = kmemdup(version_bitmap, nm_i->bitmap_size, 199079b5793bSAlexandru Gheorghiu GFP_KERNEL); 199179b5793bSAlexandru Gheorghiu if (!nm_i->nat_bitmap) 199279b5793bSAlexandru Gheorghiu return -ENOMEM; 1993e05df3b1SJaegeuk Kim return 0; 1994e05df3b1SJaegeuk Kim } 1995e05df3b1SJaegeuk Kim 1996e05df3b1SJaegeuk Kim int build_node_manager(struct f2fs_sb_info *sbi) 1997e05df3b1SJaegeuk Kim { 1998e05df3b1SJaegeuk Kim int err; 1999e05df3b1SJaegeuk Kim 2000e05df3b1SJaegeuk Kim sbi->nm_info = kzalloc(sizeof(struct f2fs_nm_info), GFP_KERNEL); 2001e05df3b1SJaegeuk Kim if (!sbi->nm_info) 2002e05df3b1SJaegeuk Kim return -ENOMEM; 2003e05df3b1SJaegeuk Kim 2004e05df3b1SJaegeuk Kim err = init_node_manager(sbi); 2005e05df3b1SJaegeuk Kim if (err) 2006e05df3b1SJaegeuk Kim return err; 2007e05df3b1SJaegeuk Kim 2008e05df3b1SJaegeuk Kim build_free_nids(sbi); 2009e05df3b1SJaegeuk Kim return 0; 2010e05df3b1SJaegeuk Kim } 2011e05df3b1SJaegeuk Kim 2012e05df3b1SJaegeuk Kim void destroy_node_manager(struct f2fs_sb_info *sbi) 2013e05df3b1SJaegeuk Kim { 2014e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 2015e05df3b1SJaegeuk Kim struct free_nid *i, *next_i; 2016e05df3b1SJaegeuk Kim struct nat_entry *natvec[NATVEC_SIZE]; 2017e05df3b1SJaegeuk Kim nid_t nid = 0; 2018e05df3b1SJaegeuk Kim unsigned int found; 2019e05df3b1SJaegeuk Kim 2020e05df3b1SJaegeuk Kim if (!nm_i) 2021e05df3b1SJaegeuk Kim return; 2022e05df3b1SJaegeuk Kim 2023e05df3b1SJaegeuk Kim /* destroy free nid list */ 2024e05df3b1SJaegeuk Kim spin_lock(&nm_i->free_nid_list_lock); 2025e05df3b1SJaegeuk Kim list_for_each_entry_safe(i, next_i, &nm_i->free_nid_list, list) { 20265d56b671SJaegeuk Kim f2fs_bug_on(i->state == NID_ALLOC); 20278a7ed66aSJaegeuk Kim __del_from_free_nid_list(nm_i, i); 2028e05df3b1SJaegeuk Kim nm_i->fcnt--; 2029cf0ee0f0SChao Yu spin_unlock(&nm_i->free_nid_list_lock); 2030cf0ee0f0SChao Yu kmem_cache_free(free_nid_slab, i); 2031cf0ee0f0SChao Yu spin_lock(&nm_i->free_nid_list_lock); 2032e05df3b1SJaegeuk Kim } 20335d56b671SJaegeuk Kim f2fs_bug_on(nm_i->fcnt); 2034e05df3b1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 2035e05df3b1SJaegeuk Kim 2036e05df3b1SJaegeuk Kim /* destroy nat cache */ 2037e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 2038e05df3b1SJaegeuk Kim while ((found = __gang_lookup_nat_cache(nm_i, 2039e05df3b1SJaegeuk Kim nid, NATVEC_SIZE, natvec))) { 2040e05df3b1SJaegeuk Kim unsigned idx; 2041b6ce391eSGu Zheng nid = nat_get_nid(natvec[found - 1]) + 1; 2042b6ce391eSGu Zheng for (idx = 0; idx < found; idx++) 2043b6ce391eSGu Zheng __del_from_nat_cache(nm_i, natvec[idx]); 2044e05df3b1SJaegeuk Kim } 20455d56b671SJaegeuk Kim f2fs_bug_on(nm_i->nat_cnt); 2046e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 2047e05df3b1SJaegeuk Kim 2048e05df3b1SJaegeuk Kim kfree(nm_i->nat_bitmap); 2049e05df3b1SJaegeuk Kim sbi->nm_info = NULL; 2050e05df3b1SJaegeuk Kim kfree(nm_i); 2051e05df3b1SJaegeuk Kim } 2052e05df3b1SJaegeuk Kim 20536e6093a8SNamjae Jeon int __init create_node_manager_caches(void) 2054e05df3b1SJaegeuk Kim { 2055e05df3b1SJaegeuk Kim nat_entry_slab = f2fs_kmem_cache_create("nat_entry", 2056e8512d2eSGu Zheng sizeof(struct nat_entry)); 2057e05df3b1SJaegeuk Kim if (!nat_entry_slab) 2058aec71382SChao Yu goto fail; 2059e05df3b1SJaegeuk Kim 2060e05df3b1SJaegeuk Kim free_nid_slab = f2fs_kmem_cache_create("free_nid", 2061e8512d2eSGu Zheng sizeof(struct free_nid)); 2062aec71382SChao Yu if (!free_nid_slab) 2063aec71382SChao Yu goto destory_nat_entry; 2064aec71382SChao Yu 2065aec71382SChao Yu nat_entry_set_slab = f2fs_kmem_cache_create("nat_entry_set", 2066aec71382SChao Yu sizeof(struct nat_entry_set)); 2067aec71382SChao Yu if (!nat_entry_set_slab) 2068aec71382SChao Yu goto destory_free_nid; 2069e05df3b1SJaegeuk Kim return 0; 2070aec71382SChao Yu 2071aec71382SChao Yu destory_free_nid: 2072aec71382SChao Yu kmem_cache_destroy(free_nid_slab); 2073aec71382SChao Yu destory_nat_entry: 2074aec71382SChao Yu kmem_cache_destroy(nat_entry_slab); 2075aec71382SChao Yu fail: 2076aec71382SChao Yu return -ENOMEM; 2077e05df3b1SJaegeuk Kim } 2078e05df3b1SJaegeuk Kim 2079e05df3b1SJaegeuk Kim void destroy_node_manager_caches(void) 2080e05df3b1SJaegeuk Kim { 2081aec71382SChao Yu kmem_cache_destroy(nat_entry_set_slab); 2082e05df3b1SJaegeuk Kim kmem_cache_destroy(free_nid_slab); 2083e05df3b1SJaegeuk Kim kmem_cache_destroy(nat_entry_slab); 2084e05df3b1SJaegeuk Kim } 2085