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 24e05df3b1SJaegeuk Kim static struct kmem_cache *nat_entry_slab; 25e05df3b1SJaegeuk Kim static struct kmem_cache *free_nid_slab; 26e05df3b1SJaegeuk Kim 27e05df3b1SJaegeuk Kim static void clear_node_page_dirty(struct page *page) 28e05df3b1SJaegeuk Kim { 29e05df3b1SJaegeuk Kim struct address_space *mapping = page->mapping; 30e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(mapping->host->i_sb); 31e05df3b1SJaegeuk Kim unsigned int long flags; 32e05df3b1SJaegeuk Kim 33e05df3b1SJaegeuk Kim if (PageDirty(page)) { 34e05df3b1SJaegeuk Kim spin_lock_irqsave(&mapping->tree_lock, flags); 35e05df3b1SJaegeuk Kim radix_tree_tag_clear(&mapping->page_tree, 36e05df3b1SJaegeuk Kim page_index(page), 37e05df3b1SJaegeuk Kim PAGECACHE_TAG_DIRTY); 38e05df3b1SJaegeuk Kim spin_unlock_irqrestore(&mapping->tree_lock, flags); 39e05df3b1SJaegeuk Kim 40e05df3b1SJaegeuk Kim clear_page_dirty_for_io(page); 41e05df3b1SJaegeuk Kim dec_page_count(sbi, F2FS_DIRTY_NODES); 42e05df3b1SJaegeuk Kim } 43e05df3b1SJaegeuk Kim ClearPageUptodate(page); 44e05df3b1SJaegeuk Kim } 45e05df3b1SJaegeuk Kim 46e05df3b1SJaegeuk Kim static struct page *get_current_nat_page(struct f2fs_sb_info *sbi, nid_t nid) 47e05df3b1SJaegeuk Kim { 48e05df3b1SJaegeuk Kim pgoff_t index = current_nat_addr(sbi, nid); 49e05df3b1SJaegeuk Kim return get_meta_page(sbi, index); 50e05df3b1SJaegeuk Kim } 51e05df3b1SJaegeuk Kim 52e05df3b1SJaegeuk Kim static struct page *get_next_nat_page(struct f2fs_sb_info *sbi, nid_t nid) 53e05df3b1SJaegeuk Kim { 54e05df3b1SJaegeuk Kim struct page *src_page; 55e05df3b1SJaegeuk Kim struct page *dst_page; 56e05df3b1SJaegeuk Kim pgoff_t src_off; 57e05df3b1SJaegeuk Kim pgoff_t dst_off; 58e05df3b1SJaegeuk Kim void *src_addr; 59e05df3b1SJaegeuk Kim void *dst_addr; 60e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 61e05df3b1SJaegeuk Kim 62e05df3b1SJaegeuk Kim src_off = current_nat_addr(sbi, nid); 63e05df3b1SJaegeuk Kim dst_off = next_nat_addr(sbi, src_off); 64e05df3b1SJaegeuk Kim 65e05df3b1SJaegeuk Kim /* get current nat block page with lock */ 66e05df3b1SJaegeuk Kim src_page = get_meta_page(sbi, src_off); 67e05df3b1SJaegeuk Kim 68e05df3b1SJaegeuk Kim /* Dirty src_page means that it is already the new target NAT page. */ 69e05df3b1SJaegeuk Kim if (PageDirty(src_page)) 70e05df3b1SJaegeuk Kim return src_page; 71e05df3b1SJaegeuk Kim 72e05df3b1SJaegeuk Kim dst_page = grab_meta_page(sbi, dst_off); 73e05df3b1SJaegeuk Kim 74e05df3b1SJaegeuk Kim src_addr = page_address(src_page); 75e05df3b1SJaegeuk Kim dst_addr = page_address(dst_page); 76e05df3b1SJaegeuk Kim memcpy(dst_addr, src_addr, PAGE_CACHE_SIZE); 77e05df3b1SJaegeuk Kim set_page_dirty(dst_page); 78e05df3b1SJaegeuk Kim f2fs_put_page(src_page, 1); 79e05df3b1SJaegeuk Kim 80e05df3b1SJaegeuk Kim set_to_next_nat(nm_i, nid); 81e05df3b1SJaegeuk Kim 82e05df3b1SJaegeuk Kim return dst_page; 83e05df3b1SJaegeuk Kim } 84e05df3b1SJaegeuk Kim 850a8165d7SJaegeuk Kim /* 86e05df3b1SJaegeuk Kim * Readahead NAT pages 87e05df3b1SJaegeuk Kim */ 88e05df3b1SJaegeuk Kim static void ra_nat_pages(struct f2fs_sb_info *sbi, int nid) 89e05df3b1SJaegeuk Kim { 90e05df3b1SJaegeuk Kim struct address_space *mapping = sbi->meta_inode->i_mapping; 91e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 92c718379bSJaegeuk Kim struct blk_plug plug; 93e05df3b1SJaegeuk Kim struct page *page; 94e05df3b1SJaegeuk Kim pgoff_t index; 95e05df3b1SJaegeuk Kim int i; 96e05df3b1SJaegeuk Kim 97c718379bSJaegeuk Kim blk_start_plug(&plug); 98c718379bSJaegeuk Kim 99e05df3b1SJaegeuk Kim for (i = 0; i < FREE_NID_PAGES; i++, nid += NAT_ENTRY_PER_BLOCK) { 100e05df3b1SJaegeuk Kim if (nid >= nm_i->max_nid) 101e05df3b1SJaegeuk Kim nid = 0; 102e05df3b1SJaegeuk Kim index = current_nat_addr(sbi, nid); 103e05df3b1SJaegeuk Kim 104e05df3b1SJaegeuk Kim page = grab_cache_page(mapping, index); 105e05df3b1SJaegeuk Kim if (!page) 106e05df3b1SJaegeuk Kim continue; 107393ff91fSJaegeuk Kim if (PageUptodate(page)) { 108e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 109e05df3b1SJaegeuk Kim continue; 110e05df3b1SJaegeuk Kim } 111393ff91fSJaegeuk Kim if (f2fs_readpage(sbi, page, index, READ)) 112393ff91fSJaegeuk Kim continue; 113393ff91fSJaegeuk Kim 114369a708cSJaegeuk Kim f2fs_put_page(page, 0); 115e05df3b1SJaegeuk Kim } 116c718379bSJaegeuk Kim blk_finish_plug(&plug); 117e05df3b1SJaegeuk Kim } 118e05df3b1SJaegeuk Kim 119e05df3b1SJaegeuk Kim static struct nat_entry *__lookup_nat_cache(struct f2fs_nm_info *nm_i, nid_t n) 120e05df3b1SJaegeuk Kim { 121e05df3b1SJaegeuk Kim return radix_tree_lookup(&nm_i->nat_root, n); 122e05df3b1SJaegeuk Kim } 123e05df3b1SJaegeuk Kim 124e05df3b1SJaegeuk Kim static unsigned int __gang_lookup_nat_cache(struct f2fs_nm_info *nm_i, 125e05df3b1SJaegeuk Kim nid_t start, unsigned int nr, struct nat_entry **ep) 126e05df3b1SJaegeuk Kim { 127e05df3b1SJaegeuk Kim return radix_tree_gang_lookup(&nm_i->nat_root, (void **)ep, start, nr); 128e05df3b1SJaegeuk Kim } 129e05df3b1SJaegeuk Kim 130e05df3b1SJaegeuk Kim static void __del_from_nat_cache(struct f2fs_nm_info *nm_i, struct nat_entry *e) 131e05df3b1SJaegeuk Kim { 132e05df3b1SJaegeuk Kim list_del(&e->list); 133e05df3b1SJaegeuk Kim radix_tree_delete(&nm_i->nat_root, nat_get_nid(e)); 134e05df3b1SJaegeuk Kim nm_i->nat_cnt--; 135e05df3b1SJaegeuk Kim kmem_cache_free(nat_entry_slab, e); 136e05df3b1SJaegeuk Kim } 137e05df3b1SJaegeuk Kim 138e05df3b1SJaegeuk Kim int is_checkpointed_node(struct f2fs_sb_info *sbi, nid_t nid) 139e05df3b1SJaegeuk Kim { 140e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 141e05df3b1SJaegeuk Kim struct nat_entry *e; 142e05df3b1SJaegeuk Kim int is_cp = 1; 143e05df3b1SJaegeuk Kim 144e05df3b1SJaegeuk Kim read_lock(&nm_i->nat_tree_lock); 145e05df3b1SJaegeuk Kim e = __lookup_nat_cache(nm_i, nid); 146e05df3b1SJaegeuk Kim if (e && !e->checkpointed) 147e05df3b1SJaegeuk Kim is_cp = 0; 148e05df3b1SJaegeuk Kim read_unlock(&nm_i->nat_tree_lock); 149e05df3b1SJaegeuk Kim return is_cp; 150e05df3b1SJaegeuk Kim } 151e05df3b1SJaegeuk Kim 152e05df3b1SJaegeuk Kim static struct nat_entry *grab_nat_entry(struct f2fs_nm_info *nm_i, nid_t nid) 153e05df3b1SJaegeuk Kim { 154e05df3b1SJaegeuk Kim struct nat_entry *new; 155e05df3b1SJaegeuk Kim 156e05df3b1SJaegeuk Kim new = kmem_cache_alloc(nat_entry_slab, GFP_ATOMIC); 157e05df3b1SJaegeuk Kim if (!new) 158e05df3b1SJaegeuk Kim return NULL; 159e05df3b1SJaegeuk Kim if (radix_tree_insert(&nm_i->nat_root, nid, new)) { 160e05df3b1SJaegeuk Kim kmem_cache_free(nat_entry_slab, new); 161e05df3b1SJaegeuk Kim return NULL; 162e05df3b1SJaegeuk Kim } 163e05df3b1SJaegeuk Kim memset(new, 0, sizeof(struct nat_entry)); 164e05df3b1SJaegeuk Kim nat_set_nid(new, nid); 165e05df3b1SJaegeuk Kim list_add_tail(&new->list, &nm_i->nat_entries); 166e05df3b1SJaegeuk Kim nm_i->nat_cnt++; 167e05df3b1SJaegeuk Kim return new; 168e05df3b1SJaegeuk Kim } 169e05df3b1SJaegeuk Kim 170e05df3b1SJaegeuk Kim static void cache_nat_entry(struct f2fs_nm_info *nm_i, nid_t nid, 171e05df3b1SJaegeuk Kim struct f2fs_nat_entry *ne) 172e05df3b1SJaegeuk Kim { 173e05df3b1SJaegeuk Kim struct nat_entry *e; 174e05df3b1SJaegeuk Kim retry: 175e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 176e05df3b1SJaegeuk Kim e = __lookup_nat_cache(nm_i, nid); 177e05df3b1SJaegeuk Kim if (!e) { 178e05df3b1SJaegeuk Kim e = grab_nat_entry(nm_i, nid); 179e05df3b1SJaegeuk Kim if (!e) { 180e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 181e05df3b1SJaegeuk Kim goto retry; 182e05df3b1SJaegeuk Kim } 183e05df3b1SJaegeuk Kim nat_set_blkaddr(e, le32_to_cpu(ne->block_addr)); 184e05df3b1SJaegeuk Kim nat_set_ino(e, le32_to_cpu(ne->ino)); 185e05df3b1SJaegeuk Kim nat_set_version(e, ne->version); 186e05df3b1SJaegeuk Kim e->checkpointed = true; 187e05df3b1SJaegeuk Kim } 188e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 189e05df3b1SJaegeuk Kim } 190e05df3b1SJaegeuk Kim 191e05df3b1SJaegeuk Kim static void set_node_addr(struct f2fs_sb_info *sbi, struct node_info *ni, 192e05df3b1SJaegeuk Kim block_t new_blkaddr) 193e05df3b1SJaegeuk Kim { 194e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 195e05df3b1SJaegeuk Kim struct nat_entry *e; 196e05df3b1SJaegeuk Kim retry: 197e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 198e05df3b1SJaegeuk Kim e = __lookup_nat_cache(nm_i, ni->nid); 199e05df3b1SJaegeuk Kim if (!e) { 200e05df3b1SJaegeuk Kim e = grab_nat_entry(nm_i, ni->nid); 201e05df3b1SJaegeuk Kim if (!e) { 202e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 203e05df3b1SJaegeuk Kim goto retry; 204e05df3b1SJaegeuk Kim } 205e05df3b1SJaegeuk Kim e->ni = *ni; 206e05df3b1SJaegeuk Kim e->checkpointed = true; 207e05df3b1SJaegeuk Kim BUG_ON(ni->blk_addr == NEW_ADDR); 208e05df3b1SJaegeuk Kim } else if (new_blkaddr == NEW_ADDR) { 209e05df3b1SJaegeuk Kim /* 210e05df3b1SJaegeuk Kim * when nid is reallocated, 211e05df3b1SJaegeuk Kim * previous nat entry can be remained in nat cache. 212e05df3b1SJaegeuk Kim * So, reinitialize it with new information. 213e05df3b1SJaegeuk Kim */ 214e05df3b1SJaegeuk Kim e->ni = *ni; 215e05df3b1SJaegeuk Kim BUG_ON(ni->blk_addr != NULL_ADDR); 216e05df3b1SJaegeuk Kim } 217e05df3b1SJaegeuk Kim 218e05df3b1SJaegeuk Kim if (new_blkaddr == NEW_ADDR) 219e05df3b1SJaegeuk Kim e->checkpointed = false; 220e05df3b1SJaegeuk Kim 221e05df3b1SJaegeuk Kim /* sanity check */ 222e05df3b1SJaegeuk Kim BUG_ON(nat_get_blkaddr(e) != ni->blk_addr); 223e05df3b1SJaegeuk Kim BUG_ON(nat_get_blkaddr(e) == NULL_ADDR && 224e05df3b1SJaegeuk Kim new_blkaddr == NULL_ADDR); 225e05df3b1SJaegeuk Kim BUG_ON(nat_get_blkaddr(e) == NEW_ADDR && 226e05df3b1SJaegeuk Kim new_blkaddr == NEW_ADDR); 227e05df3b1SJaegeuk Kim BUG_ON(nat_get_blkaddr(e) != NEW_ADDR && 228e05df3b1SJaegeuk Kim nat_get_blkaddr(e) != NULL_ADDR && 229e05df3b1SJaegeuk Kim new_blkaddr == NEW_ADDR); 230e05df3b1SJaegeuk Kim 231e05df3b1SJaegeuk Kim /* increament version no as node is removed */ 232e05df3b1SJaegeuk Kim if (nat_get_blkaddr(e) != NEW_ADDR && new_blkaddr == NULL_ADDR) { 233e05df3b1SJaegeuk Kim unsigned char version = nat_get_version(e); 234e05df3b1SJaegeuk Kim nat_set_version(e, inc_node_version(version)); 235e05df3b1SJaegeuk Kim } 236e05df3b1SJaegeuk Kim 237e05df3b1SJaegeuk Kim /* change address */ 238e05df3b1SJaegeuk Kim nat_set_blkaddr(e, new_blkaddr); 239e05df3b1SJaegeuk Kim __set_nat_cache_dirty(nm_i, e); 240e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 241e05df3b1SJaegeuk Kim } 242e05df3b1SJaegeuk Kim 243e05df3b1SJaegeuk Kim static int try_to_free_nats(struct f2fs_sb_info *sbi, int nr_shrink) 244e05df3b1SJaegeuk Kim { 245e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 246e05df3b1SJaegeuk Kim 2476cac3759SHaicheng Li if (nm_i->nat_cnt <= NM_WOUT_THRESHOLD) 248e05df3b1SJaegeuk Kim return 0; 249e05df3b1SJaegeuk Kim 250e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 251e05df3b1SJaegeuk Kim while (nr_shrink && !list_empty(&nm_i->nat_entries)) { 252e05df3b1SJaegeuk Kim struct nat_entry *ne; 253e05df3b1SJaegeuk Kim ne = list_first_entry(&nm_i->nat_entries, 254e05df3b1SJaegeuk Kim struct nat_entry, list); 255e05df3b1SJaegeuk Kim __del_from_nat_cache(nm_i, ne); 256e05df3b1SJaegeuk Kim nr_shrink--; 257e05df3b1SJaegeuk Kim } 258e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 259e05df3b1SJaegeuk Kim return nr_shrink; 260e05df3b1SJaegeuk Kim } 261e05df3b1SJaegeuk Kim 2620a8165d7SJaegeuk Kim /* 263e05df3b1SJaegeuk Kim * This function returns always success 264e05df3b1SJaegeuk Kim */ 265e05df3b1SJaegeuk Kim void get_node_info(struct f2fs_sb_info *sbi, nid_t nid, struct node_info *ni) 266e05df3b1SJaegeuk Kim { 267e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 268e05df3b1SJaegeuk Kim struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); 269e05df3b1SJaegeuk Kim struct f2fs_summary_block *sum = curseg->sum_blk; 270e05df3b1SJaegeuk Kim nid_t start_nid = START_NID(nid); 271e05df3b1SJaegeuk Kim struct f2fs_nat_block *nat_blk; 272e05df3b1SJaegeuk Kim struct page *page = NULL; 273e05df3b1SJaegeuk Kim struct f2fs_nat_entry ne; 274e05df3b1SJaegeuk Kim struct nat_entry *e; 275e05df3b1SJaegeuk Kim int i; 276e05df3b1SJaegeuk Kim 277be4124f8SNamjae Jeon memset(&ne, 0, sizeof(struct f2fs_nat_entry)); 278e05df3b1SJaegeuk Kim ni->nid = nid; 279e05df3b1SJaegeuk Kim 280e05df3b1SJaegeuk Kim /* Check nat cache */ 281e05df3b1SJaegeuk Kim read_lock(&nm_i->nat_tree_lock); 282e05df3b1SJaegeuk Kim e = __lookup_nat_cache(nm_i, nid); 283e05df3b1SJaegeuk Kim if (e) { 284e05df3b1SJaegeuk Kim ni->ino = nat_get_ino(e); 285e05df3b1SJaegeuk Kim ni->blk_addr = nat_get_blkaddr(e); 286e05df3b1SJaegeuk Kim ni->version = nat_get_version(e); 287e05df3b1SJaegeuk Kim } 288e05df3b1SJaegeuk Kim read_unlock(&nm_i->nat_tree_lock); 289e05df3b1SJaegeuk Kim if (e) 290e05df3b1SJaegeuk Kim return; 291e05df3b1SJaegeuk Kim 292e05df3b1SJaegeuk Kim /* Check current segment summary */ 293e05df3b1SJaegeuk Kim mutex_lock(&curseg->curseg_mutex); 294e05df3b1SJaegeuk Kim i = lookup_journal_in_cursum(sum, NAT_JOURNAL, nid, 0); 295e05df3b1SJaegeuk Kim if (i >= 0) { 296e05df3b1SJaegeuk Kim ne = nat_in_journal(sum, i); 297e05df3b1SJaegeuk Kim node_info_from_raw_nat(ni, &ne); 298e05df3b1SJaegeuk Kim } 299e05df3b1SJaegeuk Kim mutex_unlock(&curseg->curseg_mutex); 300e05df3b1SJaegeuk Kim if (i >= 0) 301e05df3b1SJaegeuk Kim goto cache; 302e05df3b1SJaegeuk Kim 303e05df3b1SJaegeuk Kim /* Fill node_info from nat page */ 304e05df3b1SJaegeuk Kim page = get_current_nat_page(sbi, start_nid); 305e05df3b1SJaegeuk Kim nat_blk = (struct f2fs_nat_block *)page_address(page); 306e05df3b1SJaegeuk Kim ne = nat_blk->entries[nid - start_nid]; 307e05df3b1SJaegeuk Kim node_info_from_raw_nat(ni, &ne); 308e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 309e05df3b1SJaegeuk Kim cache: 310e05df3b1SJaegeuk Kim /* cache nat entry */ 311e05df3b1SJaegeuk Kim cache_nat_entry(NM_I(sbi), nid, &ne); 312e05df3b1SJaegeuk Kim } 313e05df3b1SJaegeuk Kim 3140a8165d7SJaegeuk Kim /* 315e05df3b1SJaegeuk Kim * The maximum depth is four. 316e05df3b1SJaegeuk Kim * Offset[0] will have raw inode offset. 317e05df3b1SJaegeuk Kim */ 318e05df3b1SJaegeuk Kim static int get_node_path(long block, int offset[4], unsigned int noffset[4]) 319e05df3b1SJaegeuk Kim { 320e05df3b1SJaegeuk Kim const long direct_index = ADDRS_PER_INODE; 321e05df3b1SJaegeuk Kim const long direct_blks = ADDRS_PER_BLOCK; 322e05df3b1SJaegeuk Kim const long dptrs_per_blk = NIDS_PER_BLOCK; 323e05df3b1SJaegeuk Kim const long indirect_blks = ADDRS_PER_BLOCK * NIDS_PER_BLOCK; 324e05df3b1SJaegeuk Kim const long dindirect_blks = indirect_blks * NIDS_PER_BLOCK; 325e05df3b1SJaegeuk Kim int n = 0; 326e05df3b1SJaegeuk Kim int level = 0; 327e05df3b1SJaegeuk Kim 328e05df3b1SJaegeuk Kim noffset[0] = 0; 329e05df3b1SJaegeuk Kim 330e05df3b1SJaegeuk Kim if (block < direct_index) { 33125c0a6e5SNamjae Jeon offset[n] = block; 332e05df3b1SJaegeuk Kim goto got; 333e05df3b1SJaegeuk Kim } 334e05df3b1SJaegeuk Kim block -= direct_index; 335e05df3b1SJaegeuk Kim if (block < direct_blks) { 336e05df3b1SJaegeuk Kim offset[n++] = NODE_DIR1_BLOCK; 337e05df3b1SJaegeuk Kim noffset[n] = 1; 33825c0a6e5SNamjae Jeon offset[n] = block; 339e05df3b1SJaegeuk Kim level = 1; 340e05df3b1SJaegeuk Kim goto got; 341e05df3b1SJaegeuk Kim } 342e05df3b1SJaegeuk Kim block -= direct_blks; 343e05df3b1SJaegeuk Kim if (block < direct_blks) { 344e05df3b1SJaegeuk Kim offset[n++] = NODE_DIR2_BLOCK; 345e05df3b1SJaegeuk Kim noffset[n] = 2; 34625c0a6e5SNamjae Jeon offset[n] = block; 347e05df3b1SJaegeuk Kim level = 1; 348e05df3b1SJaegeuk Kim goto got; 349e05df3b1SJaegeuk Kim } 350e05df3b1SJaegeuk Kim block -= direct_blks; 351e05df3b1SJaegeuk Kim if (block < indirect_blks) { 352e05df3b1SJaegeuk Kim offset[n++] = NODE_IND1_BLOCK; 353e05df3b1SJaegeuk Kim noffset[n] = 3; 354e05df3b1SJaegeuk Kim offset[n++] = block / direct_blks; 355e05df3b1SJaegeuk Kim noffset[n] = 4 + offset[n - 1]; 35625c0a6e5SNamjae Jeon offset[n] = block % direct_blks; 357e05df3b1SJaegeuk Kim level = 2; 358e05df3b1SJaegeuk Kim goto got; 359e05df3b1SJaegeuk Kim } 360e05df3b1SJaegeuk Kim block -= indirect_blks; 361e05df3b1SJaegeuk Kim if (block < indirect_blks) { 362e05df3b1SJaegeuk Kim offset[n++] = NODE_IND2_BLOCK; 363e05df3b1SJaegeuk Kim noffset[n] = 4 + dptrs_per_blk; 364e05df3b1SJaegeuk Kim offset[n++] = block / direct_blks; 365e05df3b1SJaegeuk Kim noffset[n] = 5 + dptrs_per_blk + offset[n - 1]; 36625c0a6e5SNamjae Jeon offset[n] = block % direct_blks; 367e05df3b1SJaegeuk Kim level = 2; 368e05df3b1SJaegeuk Kim goto got; 369e05df3b1SJaegeuk Kim } 370e05df3b1SJaegeuk Kim block -= indirect_blks; 371e05df3b1SJaegeuk Kim if (block < dindirect_blks) { 372e05df3b1SJaegeuk Kim offset[n++] = NODE_DIND_BLOCK; 373e05df3b1SJaegeuk Kim noffset[n] = 5 + (dptrs_per_blk * 2); 374e05df3b1SJaegeuk Kim offset[n++] = block / indirect_blks; 375e05df3b1SJaegeuk Kim noffset[n] = 6 + (dptrs_per_blk * 2) + 376e05df3b1SJaegeuk Kim offset[n - 1] * (dptrs_per_blk + 1); 377e05df3b1SJaegeuk Kim offset[n++] = (block / direct_blks) % dptrs_per_blk; 378e05df3b1SJaegeuk Kim noffset[n] = 7 + (dptrs_per_blk * 2) + 379e05df3b1SJaegeuk Kim offset[n - 2] * (dptrs_per_blk + 1) + 380e05df3b1SJaegeuk Kim offset[n - 1]; 38125c0a6e5SNamjae Jeon offset[n] = block % direct_blks; 382e05df3b1SJaegeuk Kim level = 3; 383e05df3b1SJaegeuk Kim goto got; 384e05df3b1SJaegeuk Kim } else { 385e05df3b1SJaegeuk Kim BUG(); 386e05df3b1SJaegeuk Kim } 387e05df3b1SJaegeuk Kim got: 388e05df3b1SJaegeuk Kim return level; 389e05df3b1SJaegeuk Kim } 390e05df3b1SJaegeuk Kim 391e05df3b1SJaegeuk Kim /* 392e05df3b1SJaegeuk Kim * Caller should call f2fs_put_dnode(dn). 39339936837SJaegeuk Kim * Also, it should grab and release a mutex by calling mutex_lock_op() and 39439936837SJaegeuk Kim * mutex_unlock_op() only if ro is not set RDONLY_NODE. 39539936837SJaegeuk Kim * In the case of RDONLY_NODE, we don't need to care about mutex. 396e05df3b1SJaegeuk Kim */ 397266e97a8SJaegeuk Kim int get_dnode_of_data(struct dnode_of_data *dn, pgoff_t index, int mode) 398e05df3b1SJaegeuk Kim { 399e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); 400e05df3b1SJaegeuk Kim struct page *npage[4]; 401e05df3b1SJaegeuk Kim struct page *parent; 402e05df3b1SJaegeuk Kim int offset[4]; 403e05df3b1SJaegeuk Kim unsigned int noffset[4]; 404e05df3b1SJaegeuk Kim nid_t nids[4]; 405e05df3b1SJaegeuk Kim int level, i; 406e05df3b1SJaegeuk Kim int err = 0; 407e05df3b1SJaegeuk Kim 408e05df3b1SJaegeuk Kim level = get_node_path(index, offset, noffset); 409e05df3b1SJaegeuk Kim 410e05df3b1SJaegeuk Kim nids[0] = dn->inode->i_ino; 4111646cfacSJaegeuk Kim npage[0] = dn->inode_page; 4121646cfacSJaegeuk Kim 4131646cfacSJaegeuk Kim if (!npage[0]) { 414e05df3b1SJaegeuk Kim npage[0] = get_node_page(sbi, nids[0]); 415e05df3b1SJaegeuk Kim if (IS_ERR(npage[0])) 416e05df3b1SJaegeuk Kim return PTR_ERR(npage[0]); 4171646cfacSJaegeuk Kim } 418e05df3b1SJaegeuk Kim parent = npage[0]; 41952c2db3fSChangman Lee if (level != 0) 420e05df3b1SJaegeuk Kim nids[1] = get_nid(parent, offset[0], true); 421e05df3b1SJaegeuk Kim dn->inode_page = npage[0]; 422e05df3b1SJaegeuk Kim dn->inode_page_locked = true; 423e05df3b1SJaegeuk Kim 424e05df3b1SJaegeuk Kim /* get indirect or direct nodes */ 425e05df3b1SJaegeuk Kim for (i = 1; i <= level; i++) { 426e05df3b1SJaegeuk Kim bool done = false; 427e05df3b1SJaegeuk Kim 428266e97a8SJaegeuk Kim if (!nids[i] && mode == ALLOC_NODE) { 429e05df3b1SJaegeuk Kim /* alloc new node */ 430e05df3b1SJaegeuk Kim if (!alloc_nid(sbi, &(nids[i]))) { 431e05df3b1SJaegeuk Kim err = -ENOSPC; 432e05df3b1SJaegeuk Kim goto release_pages; 433e05df3b1SJaegeuk Kim } 434e05df3b1SJaegeuk Kim 435e05df3b1SJaegeuk Kim dn->nid = nids[i]; 436e05df3b1SJaegeuk Kim npage[i] = new_node_page(dn, noffset[i]); 437e05df3b1SJaegeuk Kim if (IS_ERR(npage[i])) { 438e05df3b1SJaegeuk Kim alloc_nid_failed(sbi, nids[i]); 439e05df3b1SJaegeuk Kim err = PTR_ERR(npage[i]); 440e05df3b1SJaegeuk Kim goto release_pages; 441e05df3b1SJaegeuk Kim } 442e05df3b1SJaegeuk Kim 443e05df3b1SJaegeuk Kim set_nid(parent, offset[i - 1], nids[i], i == 1); 444e05df3b1SJaegeuk Kim alloc_nid_done(sbi, nids[i]); 445e05df3b1SJaegeuk Kim done = true; 446266e97a8SJaegeuk Kim } else if (mode == LOOKUP_NODE_RA && i == level && level > 1) { 447e05df3b1SJaegeuk Kim npage[i] = get_node_page_ra(parent, offset[i - 1]); 448e05df3b1SJaegeuk Kim if (IS_ERR(npage[i])) { 449e05df3b1SJaegeuk Kim err = PTR_ERR(npage[i]); 450e05df3b1SJaegeuk Kim goto release_pages; 451e05df3b1SJaegeuk Kim } 452e05df3b1SJaegeuk Kim done = true; 453e05df3b1SJaegeuk Kim } 454e05df3b1SJaegeuk Kim if (i == 1) { 455e05df3b1SJaegeuk Kim dn->inode_page_locked = false; 456e05df3b1SJaegeuk Kim unlock_page(parent); 457e05df3b1SJaegeuk Kim } else { 458e05df3b1SJaegeuk Kim f2fs_put_page(parent, 1); 459e05df3b1SJaegeuk Kim } 460e05df3b1SJaegeuk Kim 461e05df3b1SJaegeuk Kim if (!done) { 462e05df3b1SJaegeuk Kim npage[i] = get_node_page(sbi, nids[i]); 463e05df3b1SJaegeuk Kim if (IS_ERR(npage[i])) { 464e05df3b1SJaegeuk Kim err = PTR_ERR(npage[i]); 465e05df3b1SJaegeuk Kim f2fs_put_page(npage[0], 0); 466e05df3b1SJaegeuk Kim goto release_out; 467e05df3b1SJaegeuk Kim } 468e05df3b1SJaegeuk Kim } 469e05df3b1SJaegeuk Kim if (i < level) { 470e05df3b1SJaegeuk Kim parent = npage[i]; 471e05df3b1SJaegeuk Kim nids[i + 1] = get_nid(parent, offset[i], false); 472e05df3b1SJaegeuk Kim } 473e05df3b1SJaegeuk Kim } 474e05df3b1SJaegeuk Kim dn->nid = nids[level]; 475e05df3b1SJaegeuk Kim dn->ofs_in_node = offset[level]; 476e05df3b1SJaegeuk Kim dn->node_page = npage[level]; 477e05df3b1SJaegeuk Kim dn->data_blkaddr = datablock_addr(dn->node_page, dn->ofs_in_node); 478e05df3b1SJaegeuk Kim return 0; 479e05df3b1SJaegeuk Kim 480e05df3b1SJaegeuk Kim release_pages: 481e05df3b1SJaegeuk Kim f2fs_put_page(parent, 1); 482e05df3b1SJaegeuk Kim if (i > 1) 483e05df3b1SJaegeuk Kim f2fs_put_page(npage[0], 0); 484e05df3b1SJaegeuk Kim release_out: 485e05df3b1SJaegeuk Kim dn->inode_page = NULL; 486e05df3b1SJaegeuk Kim dn->node_page = NULL; 487e05df3b1SJaegeuk Kim return err; 488e05df3b1SJaegeuk Kim } 489e05df3b1SJaegeuk Kim 490e05df3b1SJaegeuk Kim static void truncate_node(struct dnode_of_data *dn) 491e05df3b1SJaegeuk Kim { 492e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); 493e05df3b1SJaegeuk Kim struct node_info ni; 494e05df3b1SJaegeuk Kim 495e05df3b1SJaegeuk Kim get_node_info(sbi, dn->nid, &ni); 49671e9fec5SJaegeuk Kim if (dn->inode->i_blocks == 0) { 49771e9fec5SJaegeuk Kim BUG_ON(ni.blk_addr != NULL_ADDR); 49871e9fec5SJaegeuk Kim goto invalidate; 49971e9fec5SJaegeuk Kim } 500e05df3b1SJaegeuk Kim BUG_ON(ni.blk_addr == NULL_ADDR); 501e05df3b1SJaegeuk Kim 502e05df3b1SJaegeuk Kim /* Deallocate node address */ 50371e9fec5SJaegeuk Kim invalidate_blocks(sbi, ni.blk_addr); 504e05df3b1SJaegeuk Kim dec_valid_node_count(sbi, dn->inode, 1); 505e05df3b1SJaegeuk Kim set_node_addr(sbi, &ni, NULL_ADDR); 506e05df3b1SJaegeuk Kim 507e05df3b1SJaegeuk Kim if (dn->nid == dn->inode->i_ino) { 508e05df3b1SJaegeuk Kim remove_orphan_inode(sbi, dn->nid); 509e05df3b1SJaegeuk Kim dec_valid_inode_count(sbi); 510e05df3b1SJaegeuk Kim } else { 511e05df3b1SJaegeuk Kim sync_inode_page(dn); 512e05df3b1SJaegeuk Kim } 51371e9fec5SJaegeuk Kim invalidate: 514e05df3b1SJaegeuk Kim clear_node_page_dirty(dn->node_page); 515e05df3b1SJaegeuk Kim F2FS_SET_SB_DIRT(sbi); 516e05df3b1SJaegeuk Kim 517e05df3b1SJaegeuk Kim f2fs_put_page(dn->node_page, 1); 518e05df3b1SJaegeuk Kim dn->node_page = NULL; 51951dd6249SNamjae Jeon trace_f2fs_truncate_node(dn->inode, dn->nid, ni.blk_addr); 520e05df3b1SJaegeuk Kim } 521e05df3b1SJaegeuk Kim 522e05df3b1SJaegeuk Kim static int truncate_dnode(struct dnode_of_data *dn) 523e05df3b1SJaegeuk Kim { 524e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); 525e05df3b1SJaegeuk Kim struct page *page; 526e05df3b1SJaegeuk Kim 527e05df3b1SJaegeuk Kim if (dn->nid == 0) 528e05df3b1SJaegeuk Kim return 1; 529e05df3b1SJaegeuk Kim 530e05df3b1SJaegeuk Kim /* get direct node */ 531e05df3b1SJaegeuk Kim page = get_node_page(sbi, dn->nid); 532e05df3b1SJaegeuk Kim if (IS_ERR(page) && PTR_ERR(page) == -ENOENT) 533e05df3b1SJaegeuk Kim return 1; 534e05df3b1SJaegeuk Kim else if (IS_ERR(page)) 535e05df3b1SJaegeuk Kim return PTR_ERR(page); 536e05df3b1SJaegeuk Kim 537e05df3b1SJaegeuk Kim /* Make dnode_of_data for parameter */ 538e05df3b1SJaegeuk Kim dn->node_page = page; 539e05df3b1SJaegeuk Kim dn->ofs_in_node = 0; 540e05df3b1SJaegeuk Kim truncate_data_blocks(dn); 541e05df3b1SJaegeuk Kim truncate_node(dn); 542e05df3b1SJaegeuk Kim return 1; 543e05df3b1SJaegeuk Kim } 544e05df3b1SJaegeuk Kim 545e05df3b1SJaegeuk Kim static int truncate_nodes(struct dnode_of_data *dn, unsigned int nofs, 546e05df3b1SJaegeuk Kim int ofs, int depth) 547e05df3b1SJaegeuk Kim { 548e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); 549e05df3b1SJaegeuk Kim struct dnode_of_data rdn = *dn; 550e05df3b1SJaegeuk Kim struct page *page; 551e05df3b1SJaegeuk Kim struct f2fs_node *rn; 552e05df3b1SJaegeuk Kim nid_t child_nid; 553e05df3b1SJaegeuk Kim unsigned int child_nofs; 554e05df3b1SJaegeuk Kim int freed = 0; 555e05df3b1SJaegeuk Kim int i, ret; 556e05df3b1SJaegeuk Kim 557e05df3b1SJaegeuk Kim if (dn->nid == 0) 558e05df3b1SJaegeuk Kim return NIDS_PER_BLOCK + 1; 559e05df3b1SJaegeuk Kim 56051dd6249SNamjae Jeon trace_f2fs_truncate_nodes_enter(dn->inode, dn->nid, dn->data_blkaddr); 56151dd6249SNamjae Jeon 562e05df3b1SJaegeuk Kim page = get_node_page(sbi, dn->nid); 56351dd6249SNamjae Jeon if (IS_ERR(page)) { 56451dd6249SNamjae Jeon trace_f2fs_truncate_nodes_exit(dn->inode, PTR_ERR(page)); 565e05df3b1SJaegeuk Kim return PTR_ERR(page); 56651dd6249SNamjae Jeon } 567e05df3b1SJaegeuk Kim 568e05df3b1SJaegeuk Kim rn = (struct f2fs_node *)page_address(page); 569e05df3b1SJaegeuk Kim if (depth < 3) { 570e05df3b1SJaegeuk Kim for (i = ofs; i < NIDS_PER_BLOCK; i++, freed++) { 571e05df3b1SJaegeuk Kim child_nid = le32_to_cpu(rn->in.nid[i]); 572e05df3b1SJaegeuk Kim if (child_nid == 0) 573e05df3b1SJaegeuk Kim continue; 574e05df3b1SJaegeuk Kim rdn.nid = child_nid; 575e05df3b1SJaegeuk Kim ret = truncate_dnode(&rdn); 576e05df3b1SJaegeuk Kim if (ret < 0) 577e05df3b1SJaegeuk Kim goto out_err; 578e05df3b1SJaegeuk Kim set_nid(page, i, 0, false); 579e05df3b1SJaegeuk Kim } 580e05df3b1SJaegeuk Kim } else { 581e05df3b1SJaegeuk Kim child_nofs = nofs + ofs * (NIDS_PER_BLOCK + 1) + 1; 582e05df3b1SJaegeuk Kim for (i = ofs; i < NIDS_PER_BLOCK; i++) { 583e05df3b1SJaegeuk Kim child_nid = le32_to_cpu(rn->in.nid[i]); 584e05df3b1SJaegeuk Kim if (child_nid == 0) { 585e05df3b1SJaegeuk Kim child_nofs += NIDS_PER_BLOCK + 1; 586e05df3b1SJaegeuk Kim continue; 587e05df3b1SJaegeuk Kim } 588e05df3b1SJaegeuk Kim rdn.nid = child_nid; 589e05df3b1SJaegeuk Kim ret = truncate_nodes(&rdn, child_nofs, 0, depth - 1); 590e05df3b1SJaegeuk Kim if (ret == (NIDS_PER_BLOCK + 1)) { 591e05df3b1SJaegeuk Kim set_nid(page, i, 0, false); 592e05df3b1SJaegeuk Kim child_nofs += ret; 593e05df3b1SJaegeuk Kim } else if (ret < 0 && ret != -ENOENT) { 594e05df3b1SJaegeuk Kim goto out_err; 595e05df3b1SJaegeuk Kim } 596e05df3b1SJaegeuk Kim } 597e05df3b1SJaegeuk Kim freed = child_nofs; 598e05df3b1SJaegeuk Kim } 599e05df3b1SJaegeuk Kim 600e05df3b1SJaegeuk Kim if (!ofs) { 601e05df3b1SJaegeuk Kim /* remove current indirect node */ 602e05df3b1SJaegeuk Kim dn->node_page = page; 603e05df3b1SJaegeuk Kim truncate_node(dn); 604e05df3b1SJaegeuk Kim freed++; 605e05df3b1SJaegeuk Kim } else { 606e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 607e05df3b1SJaegeuk Kim } 60851dd6249SNamjae Jeon trace_f2fs_truncate_nodes_exit(dn->inode, freed); 609e05df3b1SJaegeuk Kim return freed; 610e05df3b1SJaegeuk Kim 611e05df3b1SJaegeuk Kim out_err: 612e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 61351dd6249SNamjae Jeon trace_f2fs_truncate_nodes_exit(dn->inode, ret); 614e05df3b1SJaegeuk Kim return ret; 615e05df3b1SJaegeuk Kim } 616e05df3b1SJaegeuk Kim 617e05df3b1SJaegeuk Kim static int truncate_partial_nodes(struct dnode_of_data *dn, 618e05df3b1SJaegeuk Kim struct f2fs_inode *ri, int *offset, int depth) 619e05df3b1SJaegeuk Kim { 620e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); 621e05df3b1SJaegeuk Kim struct page *pages[2]; 622e05df3b1SJaegeuk Kim nid_t nid[3]; 623e05df3b1SJaegeuk Kim nid_t child_nid; 624e05df3b1SJaegeuk Kim int err = 0; 625e05df3b1SJaegeuk Kim int i; 626e05df3b1SJaegeuk Kim int idx = depth - 2; 627e05df3b1SJaegeuk Kim 628e05df3b1SJaegeuk Kim nid[0] = le32_to_cpu(ri->i_nid[offset[0] - NODE_DIR1_BLOCK]); 629e05df3b1SJaegeuk Kim if (!nid[0]) 630e05df3b1SJaegeuk Kim return 0; 631e05df3b1SJaegeuk Kim 632e05df3b1SJaegeuk Kim /* get indirect nodes in the path */ 633e05df3b1SJaegeuk Kim for (i = 0; i < depth - 1; i++) { 634e05df3b1SJaegeuk Kim /* refernece count'll be increased */ 635e05df3b1SJaegeuk Kim pages[i] = get_node_page(sbi, nid[i]); 636e05df3b1SJaegeuk Kim if (IS_ERR(pages[i])) { 637e05df3b1SJaegeuk Kim depth = i + 1; 638e05df3b1SJaegeuk Kim err = PTR_ERR(pages[i]); 639e05df3b1SJaegeuk Kim goto fail; 640e05df3b1SJaegeuk Kim } 641e05df3b1SJaegeuk Kim nid[i + 1] = get_nid(pages[i], offset[i + 1], false); 642e05df3b1SJaegeuk Kim } 643e05df3b1SJaegeuk Kim 644e05df3b1SJaegeuk Kim /* free direct nodes linked to a partial indirect node */ 645e05df3b1SJaegeuk Kim for (i = offset[depth - 1]; i < NIDS_PER_BLOCK; i++) { 646e05df3b1SJaegeuk Kim child_nid = get_nid(pages[idx], i, false); 647e05df3b1SJaegeuk Kim if (!child_nid) 648e05df3b1SJaegeuk Kim continue; 649e05df3b1SJaegeuk Kim dn->nid = child_nid; 650e05df3b1SJaegeuk Kim err = truncate_dnode(dn); 651e05df3b1SJaegeuk Kim if (err < 0) 652e05df3b1SJaegeuk Kim goto fail; 653e05df3b1SJaegeuk Kim set_nid(pages[idx], i, 0, false); 654e05df3b1SJaegeuk Kim } 655e05df3b1SJaegeuk Kim 656e05df3b1SJaegeuk Kim if (offset[depth - 1] == 0) { 657e05df3b1SJaegeuk Kim dn->node_page = pages[idx]; 658e05df3b1SJaegeuk Kim dn->nid = nid[idx]; 659e05df3b1SJaegeuk Kim truncate_node(dn); 660e05df3b1SJaegeuk Kim } else { 661e05df3b1SJaegeuk Kim f2fs_put_page(pages[idx], 1); 662e05df3b1SJaegeuk Kim } 663e05df3b1SJaegeuk Kim offset[idx]++; 664e05df3b1SJaegeuk Kim offset[depth - 1] = 0; 665e05df3b1SJaegeuk Kim fail: 666e05df3b1SJaegeuk Kim for (i = depth - 3; i >= 0; i--) 667e05df3b1SJaegeuk Kim f2fs_put_page(pages[i], 1); 66851dd6249SNamjae Jeon 66951dd6249SNamjae Jeon trace_f2fs_truncate_partial_nodes(dn->inode, nid, depth, err); 67051dd6249SNamjae Jeon 671e05df3b1SJaegeuk Kim return err; 672e05df3b1SJaegeuk Kim } 673e05df3b1SJaegeuk Kim 6740a8165d7SJaegeuk Kim /* 675e05df3b1SJaegeuk Kim * All the block addresses of data and nodes should be nullified. 676e05df3b1SJaegeuk Kim */ 677e05df3b1SJaegeuk Kim int truncate_inode_blocks(struct inode *inode, pgoff_t from) 678e05df3b1SJaegeuk Kim { 679e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); 680afcb7ca0SJaegeuk Kim struct address_space *node_mapping = sbi->node_inode->i_mapping; 681e05df3b1SJaegeuk Kim int err = 0, cont = 1; 682e05df3b1SJaegeuk Kim int level, offset[4], noffset[4]; 6837dd690c8SJaegeuk Kim unsigned int nofs = 0; 684e05df3b1SJaegeuk Kim struct f2fs_node *rn; 685e05df3b1SJaegeuk Kim struct dnode_of_data dn; 686e05df3b1SJaegeuk Kim struct page *page; 687e05df3b1SJaegeuk Kim 68851dd6249SNamjae Jeon trace_f2fs_truncate_inode_blocks_enter(inode, from); 68951dd6249SNamjae Jeon 690e05df3b1SJaegeuk Kim level = get_node_path(from, offset, noffset); 691afcb7ca0SJaegeuk Kim restart: 692e05df3b1SJaegeuk Kim page = get_node_page(sbi, inode->i_ino); 69351dd6249SNamjae Jeon if (IS_ERR(page)) { 69451dd6249SNamjae Jeon trace_f2fs_truncate_inode_blocks_exit(inode, PTR_ERR(page)); 695e05df3b1SJaegeuk Kim return PTR_ERR(page); 69651dd6249SNamjae Jeon } 697e05df3b1SJaegeuk Kim 698e05df3b1SJaegeuk Kim set_new_dnode(&dn, inode, page, NULL, 0); 699e05df3b1SJaegeuk Kim unlock_page(page); 700e05df3b1SJaegeuk Kim 701e05df3b1SJaegeuk Kim rn = page_address(page); 702e05df3b1SJaegeuk Kim switch (level) { 703e05df3b1SJaegeuk Kim case 0: 704e05df3b1SJaegeuk Kim case 1: 705e05df3b1SJaegeuk Kim nofs = noffset[1]; 706e05df3b1SJaegeuk Kim break; 707e05df3b1SJaegeuk Kim case 2: 708e05df3b1SJaegeuk Kim nofs = noffset[1]; 709e05df3b1SJaegeuk Kim if (!offset[level - 1]) 710e05df3b1SJaegeuk Kim goto skip_partial; 711e05df3b1SJaegeuk Kim err = truncate_partial_nodes(&dn, &rn->i, offset, level); 712e05df3b1SJaegeuk Kim if (err < 0 && err != -ENOENT) 713e05df3b1SJaegeuk Kim goto fail; 714e05df3b1SJaegeuk Kim nofs += 1 + NIDS_PER_BLOCK; 715e05df3b1SJaegeuk Kim break; 716e05df3b1SJaegeuk Kim case 3: 717e05df3b1SJaegeuk Kim nofs = 5 + 2 * NIDS_PER_BLOCK; 718e05df3b1SJaegeuk Kim if (!offset[level - 1]) 719e05df3b1SJaegeuk Kim goto skip_partial; 720e05df3b1SJaegeuk Kim err = truncate_partial_nodes(&dn, &rn->i, offset, level); 721e05df3b1SJaegeuk Kim if (err < 0 && err != -ENOENT) 722e05df3b1SJaegeuk Kim goto fail; 723e05df3b1SJaegeuk Kim break; 724e05df3b1SJaegeuk Kim default: 725e05df3b1SJaegeuk Kim BUG(); 726e05df3b1SJaegeuk Kim } 727e05df3b1SJaegeuk Kim 728e05df3b1SJaegeuk Kim skip_partial: 729e05df3b1SJaegeuk Kim while (cont) { 730e05df3b1SJaegeuk Kim dn.nid = le32_to_cpu(rn->i.i_nid[offset[0] - NODE_DIR1_BLOCK]); 731e05df3b1SJaegeuk Kim switch (offset[0]) { 732e05df3b1SJaegeuk Kim case NODE_DIR1_BLOCK: 733e05df3b1SJaegeuk Kim case NODE_DIR2_BLOCK: 734e05df3b1SJaegeuk Kim err = truncate_dnode(&dn); 735e05df3b1SJaegeuk Kim break; 736e05df3b1SJaegeuk Kim 737e05df3b1SJaegeuk Kim case NODE_IND1_BLOCK: 738e05df3b1SJaegeuk Kim case NODE_IND2_BLOCK: 739e05df3b1SJaegeuk Kim err = truncate_nodes(&dn, nofs, offset[1], 2); 740e05df3b1SJaegeuk Kim break; 741e05df3b1SJaegeuk Kim 742e05df3b1SJaegeuk Kim case NODE_DIND_BLOCK: 743e05df3b1SJaegeuk Kim err = truncate_nodes(&dn, nofs, offset[1], 3); 744e05df3b1SJaegeuk Kim cont = 0; 745e05df3b1SJaegeuk Kim break; 746e05df3b1SJaegeuk Kim 747e05df3b1SJaegeuk Kim default: 748e05df3b1SJaegeuk Kim BUG(); 749e05df3b1SJaegeuk Kim } 750e05df3b1SJaegeuk Kim if (err < 0 && err != -ENOENT) 751e05df3b1SJaegeuk Kim goto fail; 752e05df3b1SJaegeuk Kim if (offset[1] == 0 && 753e05df3b1SJaegeuk Kim rn->i.i_nid[offset[0] - NODE_DIR1_BLOCK]) { 754e05df3b1SJaegeuk Kim lock_page(page); 755afcb7ca0SJaegeuk Kim if (page->mapping != node_mapping) { 756afcb7ca0SJaegeuk Kim f2fs_put_page(page, 1); 757afcb7ca0SJaegeuk Kim goto restart; 758afcb7ca0SJaegeuk Kim } 759e05df3b1SJaegeuk Kim wait_on_page_writeback(page); 760e05df3b1SJaegeuk Kim rn->i.i_nid[offset[0] - NODE_DIR1_BLOCK] = 0; 761e05df3b1SJaegeuk Kim set_page_dirty(page); 762e05df3b1SJaegeuk Kim unlock_page(page); 763e05df3b1SJaegeuk Kim } 764e05df3b1SJaegeuk Kim offset[1] = 0; 765e05df3b1SJaegeuk Kim offset[0]++; 766e05df3b1SJaegeuk Kim nofs += err; 767e05df3b1SJaegeuk Kim } 768e05df3b1SJaegeuk Kim fail: 769e05df3b1SJaegeuk Kim f2fs_put_page(page, 0); 77051dd6249SNamjae Jeon trace_f2fs_truncate_inode_blocks_exit(inode, err); 771e05df3b1SJaegeuk Kim return err > 0 ? 0 : err; 772e05df3b1SJaegeuk Kim } 773e05df3b1SJaegeuk Kim 77439936837SJaegeuk Kim /* 77539936837SJaegeuk Kim * Caller should grab and release a mutex by calling mutex_lock_op() and 77639936837SJaegeuk Kim * mutex_unlock_op(). 77739936837SJaegeuk Kim */ 778e05df3b1SJaegeuk Kim int remove_inode_page(struct inode *inode) 779e05df3b1SJaegeuk Kim { 780e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); 781e05df3b1SJaegeuk Kim struct page *page; 782e05df3b1SJaegeuk Kim nid_t ino = inode->i_ino; 783e05df3b1SJaegeuk Kim struct dnode_of_data dn; 784e05df3b1SJaegeuk Kim 785e05df3b1SJaegeuk Kim page = get_node_page(sbi, ino); 78639936837SJaegeuk Kim if (IS_ERR(page)) 787e05df3b1SJaegeuk Kim return PTR_ERR(page); 788e05df3b1SJaegeuk Kim 789e05df3b1SJaegeuk Kim if (F2FS_I(inode)->i_xattr_nid) { 790e05df3b1SJaegeuk Kim nid_t nid = F2FS_I(inode)->i_xattr_nid; 791e05df3b1SJaegeuk Kim struct page *npage = get_node_page(sbi, nid); 792e05df3b1SJaegeuk Kim 79339936837SJaegeuk Kim if (IS_ERR(npage)) 794e05df3b1SJaegeuk Kim return PTR_ERR(npage); 795e05df3b1SJaegeuk Kim 796e05df3b1SJaegeuk Kim F2FS_I(inode)->i_xattr_nid = 0; 797e05df3b1SJaegeuk Kim set_new_dnode(&dn, inode, page, npage, nid); 798e05df3b1SJaegeuk Kim dn.inode_page_locked = 1; 799e05df3b1SJaegeuk Kim truncate_node(&dn); 800e05df3b1SJaegeuk Kim } 80171e9fec5SJaegeuk Kim 80271e9fec5SJaegeuk Kim /* 0 is possible, after f2fs_new_inode() is failed */ 80371e9fec5SJaegeuk Kim BUG_ON(inode->i_blocks != 0 && inode->i_blocks != 1); 804e05df3b1SJaegeuk Kim set_new_dnode(&dn, inode, page, page, ino); 805e05df3b1SJaegeuk Kim truncate_node(&dn); 806e05df3b1SJaegeuk Kim return 0; 807e05df3b1SJaegeuk Kim } 808e05df3b1SJaegeuk Kim 80944a83ff6SJaegeuk Kim struct page *new_inode_page(struct inode *inode, const struct qstr *name) 810e05df3b1SJaegeuk Kim { 811e05df3b1SJaegeuk Kim struct dnode_of_data dn; 812e05df3b1SJaegeuk Kim 813e05df3b1SJaegeuk Kim /* allocate inode page for new inode */ 814e05df3b1SJaegeuk Kim set_new_dnode(&dn, inode, NULL, NULL, inode->i_ino); 81544a83ff6SJaegeuk Kim 81644a83ff6SJaegeuk Kim /* caller should f2fs_put_page(page, 1); */ 81744a83ff6SJaegeuk Kim return new_node_page(&dn, 0); 818e05df3b1SJaegeuk Kim } 819e05df3b1SJaegeuk Kim 820e05df3b1SJaegeuk Kim struct page *new_node_page(struct dnode_of_data *dn, unsigned int ofs) 821e05df3b1SJaegeuk Kim { 822e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); 823e05df3b1SJaegeuk Kim struct address_space *mapping = sbi->node_inode->i_mapping; 824e05df3b1SJaegeuk Kim struct node_info old_ni, new_ni; 825e05df3b1SJaegeuk Kim struct page *page; 826e05df3b1SJaegeuk Kim int err; 827e05df3b1SJaegeuk Kim 828e05df3b1SJaegeuk Kim if (is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC)) 829e05df3b1SJaegeuk Kim return ERR_PTR(-EPERM); 830e05df3b1SJaegeuk Kim 831e05df3b1SJaegeuk Kim page = grab_cache_page(mapping, dn->nid); 832e05df3b1SJaegeuk Kim if (!page) 833e05df3b1SJaegeuk Kim return ERR_PTR(-ENOMEM); 834e05df3b1SJaegeuk Kim 835e05df3b1SJaegeuk Kim get_node_info(sbi, dn->nid, &old_ni); 836e05df3b1SJaegeuk Kim 837e05df3b1SJaegeuk Kim SetPageUptodate(page); 838e05df3b1SJaegeuk Kim fill_node_footer(page, dn->nid, dn->inode->i_ino, ofs, true); 839e05df3b1SJaegeuk Kim 840e05df3b1SJaegeuk Kim /* Reinitialize old_ni with new node page */ 841e05df3b1SJaegeuk Kim BUG_ON(old_ni.blk_addr != NULL_ADDR); 842e05df3b1SJaegeuk Kim new_ni = old_ni; 843e05df3b1SJaegeuk Kim new_ni.ino = dn->inode->i_ino; 844e05df3b1SJaegeuk Kim 845e05df3b1SJaegeuk Kim if (!inc_valid_node_count(sbi, dn->inode, 1)) { 846e05df3b1SJaegeuk Kim err = -ENOSPC; 847e05df3b1SJaegeuk Kim goto fail; 848e05df3b1SJaegeuk Kim } 849e05df3b1SJaegeuk Kim set_node_addr(sbi, &new_ni, NEW_ADDR); 850398b1ac5SJaegeuk Kim set_cold_node(dn->inode, page); 851e05df3b1SJaegeuk Kim 852e05df3b1SJaegeuk Kim dn->node_page = page; 853e05df3b1SJaegeuk Kim sync_inode_page(dn); 854e05df3b1SJaegeuk Kim set_page_dirty(page); 855e05df3b1SJaegeuk Kim if (ofs == 0) 856e05df3b1SJaegeuk Kim inc_valid_inode_count(sbi); 857e05df3b1SJaegeuk Kim 858e05df3b1SJaegeuk Kim return page; 859e05df3b1SJaegeuk Kim 860e05df3b1SJaegeuk Kim fail: 86171e9fec5SJaegeuk Kim clear_node_page_dirty(page); 862e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 863e05df3b1SJaegeuk Kim return ERR_PTR(err); 864e05df3b1SJaegeuk Kim } 865e05df3b1SJaegeuk Kim 86656ae674cSJaegeuk Kim /* 86756ae674cSJaegeuk Kim * Caller should do after getting the following values. 86856ae674cSJaegeuk Kim * 0: f2fs_put_page(page, 0) 86956ae674cSJaegeuk Kim * LOCKED_PAGE: f2fs_put_page(page, 1) 87056ae674cSJaegeuk Kim * error: nothing 87156ae674cSJaegeuk Kim */ 872e05df3b1SJaegeuk Kim static int read_node_page(struct page *page, int type) 873e05df3b1SJaegeuk Kim { 874e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(page->mapping->host->i_sb); 875e05df3b1SJaegeuk Kim struct node_info ni; 876e05df3b1SJaegeuk Kim 877e05df3b1SJaegeuk Kim get_node_info(sbi, page->index, &ni); 878e05df3b1SJaegeuk Kim 879393ff91fSJaegeuk Kim if (ni.blk_addr == NULL_ADDR) { 880393ff91fSJaegeuk Kim f2fs_put_page(page, 1); 881e05df3b1SJaegeuk Kim return -ENOENT; 882393ff91fSJaegeuk Kim } 883393ff91fSJaegeuk Kim 88456ae674cSJaegeuk Kim if (PageUptodate(page)) 88556ae674cSJaegeuk Kim return LOCKED_PAGE; 886393ff91fSJaegeuk Kim 887e05df3b1SJaegeuk Kim return f2fs_readpage(sbi, page, ni.blk_addr, type); 888e05df3b1SJaegeuk Kim } 889e05df3b1SJaegeuk Kim 8900a8165d7SJaegeuk Kim /* 891e05df3b1SJaegeuk Kim * Readahead a node page 892e05df3b1SJaegeuk Kim */ 893e05df3b1SJaegeuk Kim void ra_node_page(struct f2fs_sb_info *sbi, nid_t nid) 894e05df3b1SJaegeuk Kim { 895e05df3b1SJaegeuk Kim struct address_space *mapping = sbi->node_inode->i_mapping; 896e05df3b1SJaegeuk Kim struct page *apage; 89756ae674cSJaegeuk Kim int err; 898e05df3b1SJaegeuk Kim 899e05df3b1SJaegeuk Kim apage = find_get_page(mapping, nid); 900393ff91fSJaegeuk Kim if (apage && PageUptodate(apage)) { 901393ff91fSJaegeuk Kim f2fs_put_page(apage, 0); 902393ff91fSJaegeuk Kim return; 903393ff91fSJaegeuk Kim } 904e05df3b1SJaegeuk Kim f2fs_put_page(apage, 0); 905e05df3b1SJaegeuk Kim 906e05df3b1SJaegeuk Kim apage = grab_cache_page(mapping, nid); 907e05df3b1SJaegeuk Kim if (!apage) 908e05df3b1SJaegeuk Kim return; 909e05df3b1SJaegeuk Kim 91056ae674cSJaegeuk Kim err = read_node_page(apage, READA); 91156ae674cSJaegeuk Kim if (err == 0) 912369a708cSJaegeuk Kim f2fs_put_page(apage, 0); 91356ae674cSJaegeuk Kim else if (err == LOCKED_PAGE) 91456ae674cSJaegeuk Kim f2fs_put_page(apage, 1); 915a2b52a59SNamjae Jeon return; 916e05df3b1SJaegeuk Kim } 917e05df3b1SJaegeuk Kim 918e05df3b1SJaegeuk Kim struct page *get_node_page(struct f2fs_sb_info *sbi, pgoff_t nid) 919e05df3b1SJaegeuk Kim { 920e05df3b1SJaegeuk Kim struct address_space *mapping = sbi->node_inode->i_mapping; 92156ae674cSJaegeuk Kim struct page *page; 92256ae674cSJaegeuk Kim int err; 923afcb7ca0SJaegeuk Kim repeat: 924e05df3b1SJaegeuk Kim page = grab_cache_page(mapping, nid); 925e05df3b1SJaegeuk Kim if (!page) 926e05df3b1SJaegeuk Kim return ERR_PTR(-ENOMEM); 927e05df3b1SJaegeuk Kim 928e05df3b1SJaegeuk Kim err = read_node_page(page, READ_SYNC); 92956ae674cSJaegeuk Kim if (err < 0) 930e05df3b1SJaegeuk Kim return ERR_PTR(err); 93156ae674cSJaegeuk Kim else if (err == LOCKED_PAGE) 93256ae674cSJaegeuk Kim goto got_it; 933e05df3b1SJaegeuk Kim 934393ff91fSJaegeuk Kim lock_page(page); 935393ff91fSJaegeuk Kim if (!PageUptodate(page)) { 936393ff91fSJaegeuk Kim f2fs_put_page(page, 1); 937393ff91fSJaegeuk Kim return ERR_PTR(-EIO); 938393ff91fSJaegeuk Kim } 939afcb7ca0SJaegeuk Kim if (page->mapping != mapping) { 940afcb7ca0SJaegeuk Kim f2fs_put_page(page, 1); 941afcb7ca0SJaegeuk Kim goto repeat; 942afcb7ca0SJaegeuk Kim } 94356ae674cSJaegeuk Kim got_it: 944e05df3b1SJaegeuk Kim BUG_ON(nid != nid_of_node(page)); 945e05df3b1SJaegeuk Kim mark_page_accessed(page); 946e05df3b1SJaegeuk Kim return page; 947e05df3b1SJaegeuk Kim } 948e05df3b1SJaegeuk Kim 9490a8165d7SJaegeuk Kim /* 950e05df3b1SJaegeuk Kim * Return a locked page for the desired node page. 951e05df3b1SJaegeuk Kim * And, readahead MAX_RA_NODE number of node pages. 952e05df3b1SJaegeuk Kim */ 953e05df3b1SJaegeuk Kim struct page *get_node_page_ra(struct page *parent, int start) 954e05df3b1SJaegeuk Kim { 955e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(parent->mapping->host->i_sb); 956e05df3b1SJaegeuk Kim struct address_space *mapping = sbi->node_inode->i_mapping; 957c718379bSJaegeuk Kim struct blk_plug plug; 958e05df3b1SJaegeuk Kim struct page *page; 95956ae674cSJaegeuk Kim int err, i, end; 96056ae674cSJaegeuk Kim nid_t nid; 961e05df3b1SJaegeuk Kim 962e05df3b1SJaegeuk Kim /* First, try getting the desired direct node. */ 963e05df3b1SJaegeuk Kim nid = get_nid(parent, start, false); 964e05df3b1SJaegeuk Kim if (!nid) 965e05df3b1SJaegeuk Kim return ERR_PTR(-ENOENT); 966afcb7ca0SJaegeuk Kim repeat: 967e05df3b1SJaegeuk Kim page = grab_cache_page(mapping, nid); 968e05df3b1SJaegeuk Kim if (!page) 969e05df3b1SJaegeuk Kim return ERR_PTR(-ENOMEM); 970e05df3b1SJaegeuk Kim 97166d36a29SJaegeuk Kim err = read_node_page(page, READ_SYNC); 97256ae674cSJaegeuk Kim if (err < 0) 973e05df3b1SJaegeuk Kim return ERR_PTR(err); 97456ae674cSJaegeuk Kim else if (err == LOCKED_PAGE) 97556ae674cSJaegeuk Kim goto page_hit; 976e05df3b1SJaegeuk Kim 977c718379bSJaegeuk Kim blk_start_plug(&plug); 978c718379bSJaegeuk Kim 979e05df3b1SJaegeuk Kim /* Then, try readahead for siblings of the desired node */ 980e05df3b1SJaegeuk Kim end = start + MAX_RA_NODE; 981e05df3b1SJaegeuk Kim end = min(end, NIDS_PER_BLOCK); 982e05df3b1SJaegeuk Kim for (i = start + 1; i < end; i++) { 983e05df3b1SJaegeuk Kim nid = get_nid(parent, i, false); 984e05df3b1SJaegeuk Kim if (!nid) 985e05df3b1SJaegeuk Kim continue; 986e05df3b1SJaegeuk Kim ra_node_page(sbi, nid); 987e05df3b1SJaegeuk Kim } 988e05df3b1SJaegeuk Kim 989c718379bSJaegeuk Kim blk_finish_plug(&plug); 990c718379bSJaegeuk Kim 991e05df3b1SJaegeuk Kim lock_page(page); 992afcb7ca0SJaegeuk Kim if (page->mapping != mapping) { 993afcb7ca0SJaegeuk Kim f2fs_put_page(page, 1); 994afcb7ca0SJaegeuk Kim goto repeat; 995afcb7ca0SJaegeuk Kim } 996e0f56cb4SNamjae Jeon page_hit: 99756ae674cSJaegeuk Kim if (!PageUptodate(page)) { 998e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 999e05df3b1SJaegeuk Kim return ERR_PTR(-EIO); 1000e05df3b1SJaegeuk Kim } 1001393ff91fSJaegeuk Kim mark_page_accessed(page); 1002e05df3b1SJaegeuk Kim return page; 1003e05df3b1SJaegeuk Kim } 1004e05df3b1SJaegeuk Kim 1005e05df3b1SJaegeuk Kim void sync_inode_page(struct dnode_of_data *dn) 1006e05df3b1SJaegeuk Kim { 1007e05df3b1SJaegeuk Kim if (IS_INODE(dn->node_page) || dn->inode_page == dn->node_page) { 1008e05df3b1SJaegeuk Kim update_inode(dn->inode, dn->node_page); 1009e05df3b1SJaegeuk Kim } else if (dn->inode_page) { 1010e05df3b1SJaegeuk Kim if (!dn->inode_page_locked) 1011e05df3b1SJaegeuk Kim lock_page(dn->inode_page); 1012e05df3b1SJaegeuk Kim update_inode(dn->inode, dn->inode_page); 1013e05df3b1SJaegeuk Kim if (!dn->inode_page_locked) 1014e05df3b1SJaegeuk Kim unlock_page(dn->inode_page); 1015e05df3b1SJaegeuk Kim } else { 101639936837SJaegeuk Kim update_inode_page(dn->inode); 1017e05df3b1SJaegeuk Kim } 1018e05df3b1SJaegeuk Kim } 1019e05df3b1SJaegeuk Kim 1020e05df3b1SJaegeuk Kim int sync_node_pages(struct f2fs_sb_info *sbi, nid_t ino, 1021e05df3b1SJaegeuk Kim struct writeback_control *wbc) 1022e05df3b1SJaegeuk Kim { 1023e05df3b1SJaegeuk Kim struct address_space *mapping = sbi->node_inode->i_mapping; 1024e05df3b1SJaegeuk Kim pgoff_t index, end; 1025e05df3b1SJaegeuk Kim struct pagevec pvec; 1026e05df3b1SJaegeuk Kim int step = ino ? 2 : 0; 1027e05df3b1SJaegeuk Kim int nwritten = 0, wrote = 0; 1028e05df3b1SJaegeuk Kim 1029e05df3b1SJaegeuk Kim pagevec_init(&pvec, 0); 1030e05df3b1SJaegeuk Kim 1031e05df3b1SJaegeuk Kim next_step: 1032e05df3b1SJaegeuk Kim index = 0; 1033e05df3b1SJaegeuk Kim end = LONG_MAX; 1034e05df3b1SJaegeuk Kim 1035e05df3b1SJaegeuk Kim while (index <= end) { 1036e05df3b1SJaegeuk Kim int i, nr_pages; 1037e05df3b1SJaegeuk Kim nr_pages = pagevec_lookup_tag(&pvec, mapping, &index, 1038e05df3b1SJaegeuk Kim PAGECACHE_TAG_DIRTY, 1039e05df3b1SJaegeuk Kim min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1); 1040e05df3b1SJaegeuk Kim if (nr_pages == 0) 1041e05df3b1SJaegeuk Kim break; 1042e05df3b1SJaegeuk Kim 1043e05df3b1SJaegeuk Kim for (i = 0; i < nr_pages; i++) { 1044e05df3b1SJaegeuk Kim struct page *page = pvec.pages[i]; 1045e05df3b1SJaegeuk Kim 1046e05df3b1SJaegeuk Kim /* 1047e05df3b1SJaegeuk Kim * flushing sequence with step: 1048e05df3b1SJaegeuk Kim * 0. indirect nodes 1049e05df3b1SJaegeuk Kim * 1. dentry dnodes 1050e05df3b1SJaegeuk Kim * 2. file dnodes 1051e05df3b1SJaegeuk Kim */ 1052e05df3b1SJaegeuk Kim if (step == 0 && IS_DNODE(page)) 1053e05df3b1SJaegeuk Kim continue; 1054e05df3b1SJaegeuk Kim if (step == 1 && (!IS_DNODE(page) || 1055e05df3b1SJaegeuk Kim is_cold_node(page))) 1056e05df3b1SJaegeuk Kim continue; 1057e05df3b1SJaegeuk Kim if (step == 2 && (!IS_DNODE(page) || 1058e05df3b1SJaegeuk Kim !is_cold_node(page))) 1059e05df3b1SJaegeuk Kim continue; 1060e05df3b1SJaegeuk Kim 1061e05df3b1SJaegeuk Kim /* 1062e05df3b1SJaegeuk Kim * If an fsync mode, 1063e05df3b1SJaegeuk Kim * we should not skip writing node pages. 1064e05df3b1SJaegeuk Kim */ 1065e05df3b1SJaegeuk Kim if (ino && ino_of_node(page) == ino) 1066e05df3b1SJaegeuk Kim lock_page(page); 1067e05df3b1SJaegeuk Kim else if (!trylock_page(page)) 1068e05df3b1SJaegeuk Kim continue; 1069e05df3b1SJaegeuk Kim 1070e05df3b1SJaegeuk Kim if (unlikely(page->mapping != mapping)) { 1071e05df3b1SJaegeuk Kim continue_unlock: 1072e05df3b1SJaegeuk Kim unlock_page(page); 1073e05df3b1SJaegeuk Kim continue; 1074e05df3b1SJaegeuk Kim } 1075e05df3b1SJaegeuk Kim if (ino && ino_of_node(page) != ino) 1076e05df3b1SJaegeuk Kim goto continue_unlock; 1077e05df3b1SJaegeuk Kim 1078e05df3b1SJaegeuk Kim if (!PageDirty(page)) { 1079e05df3b1SJaegeuk Kim /* someone wrote it for us */ 1080e05df3b1SJaegeuk Kim goto continue_unlock; 1081e05df3b1SJaegeuk Kim } 1082e05df3b1SJaegeuk Kim 1083e05df3b1SJaegeuk Kim if (!clear_page_dirty_for_io(page)) 1084e05df3b1SJaegeuk Kim goto continue_unlock; 1085e05df3b1SJaegeuk Kim 1086e05df3b1SJaegeuk Kim /* called by fsync() */ 1087e05df3b1SJaegeuk Kim if (ino && IS_DNODE(page)) { 1088e05df3b1SJaegeuk Kim int mark = !is_checkpointed_node(sbi, ino); 1089e05df3b1SJaegeuk Kim set_fsync_mark(page, 1); 1090e05df3b1SJaegeuk Kim if (IS_INODE(page)) 1091e05df3b1SJaegeuk Kim set_dentry_mark(page, mark); 1092e05df3b1SJaegeuk Kim nwritten++; 1093e05df3b1SJaegeuk Kim } else { 1094e05df3b1SJaegeuk Kim set_fsync_mark(page, 0); 1095e05df3b1SJaegeuk Kim set_dentry_mark(page, 0); 1096e05df3b1SJaegeuk Kim } 1097e05df3b1SJaegeuk Kim mapping->a_ops->writepage(page, wbc); 1098e05df3b1SJaegeuk Kim wrote++; 1099e05df3b1SJaegeuk Kim 1100e05df3b1SJaegeuk Kim if (--wbc->nr_to_write == 0) 1101e05df3b1SJaegeuk Kim break; 1102e05df3b1SJaegeuk Kim } 1103e05df3b1SJaegeuk Kim pagevec_release(&pvec); 1104e05df3b1SJaegeuk Kim cond_resched(); 1105e05df3b1SJaegeuk Kim 1106e05df3b1SJaegeuk Kim if (wbc->nr_to_write == 0) { 1107e05df3b1SJaegeuk Kim step = 2; 1108e05df3b1SJaegeuk Kim break; 1109e05df3b1SJaegeuk Kim } 1110e05df3b1SJaegeuk Kim } 1111e05df3b1SJaegeuk Kim 1112e05df3b1SJaegeuk Kim if (step < 2) { 1113e05df3b1SJaegeuk Kim step++; 1114e05df3b1SJaegeuk Kim goto next_step; 1115e05df3b1SJaegeuk Kim } 1116e05df3b1SJaegeuk Kim 1117e05df3b1SJaegeuk Kim if (wrote) 1118e05df3b1SJaegeuk Kim f2fs_submit_bio(sbi, NODE, wbc->sync_mode == WB_SYNC_ALL); 1119e05df3b1SJaegeuk Kim 1120e05df3b1SJaegeuk Kim return nwritten; 1121e05df3b1SJaegeuk Kim } 1122e05df3b1SJaegeuk Kim 1123e05df3b1SJaegeuk Kim static int f2fs_write_node_page(struct page *page, 1124e05df3b1SJaegeuk Kim struct writeback_control *wbc) 1125e05df3b1SJaegeuk Kim { 1126e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(page->mapping->host->i_sb); 1127e05df3b1SJaegeuk Kim nid_t nid; 1128e05df3b1SJaegeuk Kim block_t new_addr; 1129e05df3b1SJaegeuk Kim struct node_info ni; 1130e05df3b1SJaegeuk Kim 1131e05df3b1SJaegeuk Kim wait_on_page_writeback(page); 1132e05df3b1SJaegeuk Kim 1133e05df3b1SJaegeuk Kim /* get old block addr of this node page */ 1134e05df3b1SJaegeuk Kim nid = nid_of_node(page); 1135e05df3b1SJaegeuk Kim BUG_ON(page->index != nid); 1136e05df3b1SJaegeuk Kim 1137e05df3b1SJaegeuk Kim get_node_info(sbi, nid, &ni); 1138e05df3b1SJaegeuk Kim 1139e05df3b1SJaegeuk Kim /* This page is already truncated */ 114039936837SJaegeuk Kim if (ni.blk_addr == NULL_ADDR) { 114139936837SJaegeuk Kim dec_page_count(sbi, F2FS_DIRTY_NODES); 114239936837SJaegeuk Kim unlock_page(page); 114339936837SJaegeuk Kim return 0; 114439936837SJaegeuk Kim } 1145e05df3b1SJaegeuk Kim 114608d8058bSJaegeuk Kim if (wbc->for_reclaim) { 114708d8058bSJaegeuk Kim dec_page_count(sbi, F2FS_DIRTY_NODES); 114808d8058bSJaegeuk Kim wbc->pages_skipped++; 114908d8058bSJaegeuk Kim set_page_dirty(page); 115008d8058bSJaegeuk Kim return AOP_WRITEPAGE_ACTIVATE; 115108d8058bSJaegeuk Kim } 115208d8058bSJaegeuk Kim 115339936837SJaegeuk Kim mutex_lock(&sbi->node_write); 1154e05df3b1SJaegeuk Kim set_page_writeback(page); 1155e05df3b1SJaegeuk Kim write_node_page(sbi, page, nid, ni.blk_addr, &new_addr); 1156e05df3b1SJaegeuk Kim set_node_addr(sbi, &ni, new_addr); 1157e05df3b1SJaegeuk Kim dec_page_count(sbi, F2FS_DIRTY_NODES); 115839936837SJaegeuk Kim mutex_unlock(&sbi->node_write); 1159e05df3b1SJaegeuk Kim unlock_page(page); 1160e05df3b1SJaegeuk Kim return 0; 1161e05df3b1SJaegeuk Kim } 1162e05df3b1SJaegeuk Kim 1163a7fdffbdSJaegeuk Kim /* 1164a7fdffbdSJaegeuk Kim * It is very important to gather dirty pages and write at once, so that we can 1165a7fdffbdSJaegeuk Kim * submit a big bio without interfering other data writes. 1166a7fdffbdSJaegeuk Kim * Be default, 512 pages (2MB), a segment size, is quite reasonable. 1167a7fdffbdSJaegeuk Kim */ 1168a7fdffbdSJaegeuk Kim #define COLLECT_DIRTY_NODES 512 1169e05df3b1SJaegeuk Kim static int f2fs_write_node_pages(struct address_space *mapping, 1170e05df3b1SJaegeuk Kim struct writeback_control *wbc) 1171e05df3b1SJaegeuk Kim { 1172e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(mapping->host->i_sb); 1173e05df3b1SJaegeuk Kim long nr_to_write = wbc->nr_to_write; 1174e05df3b1SJaegeuk Kim 1175a7fdffbdSJaegeuk Kim /* First check balancing cached NAT entries */ 1176e05df3b1SJaegeuk Kim if (try_to_free_nats(sbi, NAT_ENTRY_PER_BLOCK)) { 1177b7473754SJaegeuk Kim f2fs_sync_fs(sbi->sb, true); 1178e05df3b1SJaegeuk Kim return 0; 1179e05df3b1SJaegeuk Kim } 1180e05df3b1SJaegeuk Kim 1181a7fdffbdSJaegeuk Kim /* collect a number of dirty node pages and write together */ 1182a7fdffbdSJaegeuk Kim if (get_pages(sbi, F2FS_DIRTY_NODES) < COLLECT_DIRTY_NODES) 1183a7fdffbdSJaegeuk Kim return 0; 1184a7fdffbdSJaegeuk Kim 1185e05df3b1SJaegeuk Kim /* if mounting is failed, skip writing node pages */ 1186ac5d156cSJaegeuk Kim wbc->nr_to_write = max_hw_blocks(sbi); 1187e05df3b1SJaegeuk Kim sync_node_pages(sbi, 0, wbc); 1188ac5d156cSJaegeuk Kim wbc->nr_to_write = nr_to_write - (max_hw_blocks(sbi) - wbc->nr_to_write); 1189e05df3b1SJaegeuk Kim return 0; 1190e05df3b1SJaegeuk Kim } 1191e05df3b1SJaegeuk Kim 1192e05df3b1SJaegeuk Kim static int f2fs_set_node_page_dirty(struct page *page) 1193e05df3b1SJaegeuk Kim { 1194e05df3b1SJaegeuk Kim struct address_space *mapping = page->mapping; 1195e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(mapping->host->i_sb); 1196e05df3b1SJaegeuk Kim 1197e05df3b1SJaegeuk Kim SetPageUptodate(page); 1198e05df3b1SJaegeuk Kim if (!PageDirty(page)) { 1199e05df3b1SJaegeuk Kim __set_page_dirty_nobuffers(page); 1200e05df3b1SJaegeuk Kim inc_page_count(sbi, F2FS_DIRTY_NODES); 1201e05df3b1SJaegeuk Kim SetPagePrivate(page); 1202e05df3b1SJaegeuk Kim return 1; 1203e05df3b1SJaegeuk Kim } 1204e05df3b1SJaegeuk Kim return 0; 1205e05df3b1SJaegeuk Kim } 1206e05df3b1SJaegeuk Kim 1207e05df3b1SJaegeuk Kim static void f2fs_invalidate_node_page(struct page *page, unsigned long offset) 1208e05df3b1SJaegeuk Kim { 1209e05df3b1SJaegeuk Kim struct inode *inode = page->mapping->host; 1210e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); 1211e05df3b1SJaegeuk Kim if (PageDirty(page)) 1212e05df3b1SJaegeuk Kim dec_page_count(sbi, F2FS_DIRTY_NODES); 1213e05df3b1SJaegeuk Kim ClearPagePrivate(page); 1214e05df3b1SJaegeuk Kim } 1215e05df3b1SJaegeuk Kim 1216e05df3b1SJaegeuk Kim static int f2fs_release_node_page(struct page *page, gfp_t wait) 1217e05df3b1SJaegeuk Kim { 1218e05df3b1SJaegeuk Kim ClearPagePrivate(page); 1219c3850aa1SJaegeuk Kim return 1; 1220e05df3b1SJaegeuk Kim } 1221e05df3b1SJaegeuk Kim 12220a8165d7SJaegeuk Kim /* 1223e05df3b1SJaegeuk Kim * Structure of the f2fs node operations 1224e05df3b1SJaegeuk Kim */ 1225e05df3b1SJaegeuk Kim const struct address_space_operations f2fs_node_aops = { 1226e05df3b1SJaegeuk Kim .writepage = f2fs_write_node_page, 1227e05df3b1SJaegeuk Kim .writepages = f2fs_write_node_pages, 1228e05df3b1SJaegeuk Kim .set_page_dirty = f2fs_set_node_page_dirty, 1229e05df3b1SJaegeuk Kim .invalidatepage = f2fs_invalidate_node_page, 1230e05df3b1SJaegeuk Kim .releasepage = f2fs_release_node_page, 1231e05df3b1SJaegeuk Kim }; 1232e05df3b1SJaegeuk Kim 1233e05df3b1SJaegeuk Kim static struct free_nid *__lookup_free_nid_list(nid_t n, struct list_head *head) 1234e05df3b1SJaegeuk Kim { 1235e05df3b1SJaegeuk Kim struct list_head *this; 12363aa770a9SNamjae Jeon struct free_nid *i; 1237e05df3b1SJaegeuk Kim list_for_each(this, head) { 1238e05df3b1SJaegeuk Kim i = list_entry(this, struct free_nid, list); 1239e05df3b1SJaegeuk Kim if (i->nid == n) 1240e05df3b1SJaegeuk Kim return i; 1241e05df3b1SJaegeuk Kim } 12423aa770a9SNamjae Jeon return NULL; 12433aa770a9SNamjae Jeon } 1244e05df3b1SJaegeuk Kim 1245e05df3b1SJaegeuk Kim static void __del_from_free_nid_list(struct free_nid *i) 1246e05df3b1SJaegeuk Kim { 1247e05df3b1SJaegeuk Kim list_del(&i->list); 1248e05df3b1SJaegeuk Kim kmem_cache_free(free_nid_slab, i); 1249e05df3b1SJaegeuk Kim } 1250e05df3b1SJaegeuk Kim 125159bbd474SJaegeuk Kim static int add_free_nid(struct f2fs_nm_info *nm_i, nid_t nid, bool build) 1252e05df3b1SJaegeuk Kim { 1253e05df3b1SJaegeuk Kim struct free_nid *i; 125459bbd474SJaegeuk Kim struct nat_entry *ne; 125559bbd474SJaegeuk Kim bool allocated = false; 1256e05df3b1SJaegeuk Kim 1257e05df3b1SJaegeuk Kim if (nm_i->fcnt > 2 * MAX_FREE_NIDS) 125823d38844SHaicheng Li return -1; 12599198acebSJaegeuk Kim 12609198acebSJaegeuk Kim /* 0 nid should not be used */ 12619198acebSJaegeuk Kim if (nid == 0) 12629198acebSJaegeuk Kim return 0; 126359bbd474SJaegeuk Kim 126459bbd474SJaegeuk Kim if (!build) 126559bbd474SJaegeuk Kim goto retry; 126659bbd474SJaegeuk Kim 126759bbd474SJaegeuk Kim /* do not add allocated nids */ 126859bbd474SJaegeuk Kim read_lock(&nm_i->nat_tree_lock); 126959bbd474SJaegeuk Kim ne = __lookup_nat_cache(nm_i, nid); 127059bbd474SJaegeuk Kim if (ne && nat_get_blkaddr(ne) != NULL_ADDR) 127159bbd474SJaegeuk Kim allocated = true; 127259bbd474SJaegeuk Kim read_unlock(&nm_i->nat_tree_lock); 127359bbd474SJaegeuk Kim if (allocated) 127459bbd474SJaegeuk Kim return 0; 1275e05df3b1SJaegeuk Kim retry: 1276e05df3b1SJaegeuk Kim i = kmem_cache_alloc(free_nid_slab, GFP_NOFS); 1277e05df3b1SJaegeuk Kim if (!i) { 1278e05df3b1SJaegeuk Kim cond_resched(); 1279e05df3b1SJaegeuk Kim goto retry; 1280e05df3b1SJaegeuk Kim } 1281e05df3b1SJaegeuk Kim i->nid = nid; 1282e05df3b1SJaegeuk Kim i->state = NID_NEW; 1283e05df3b1SJaegeuk Kim 1284e05df3b1SJaegeuk Kim spin_lock(&nm_i->free_nid_list_lock); 1285e05df3b1SJaegeuk Kim if (__lookup_free_nid_list(nid, &nm_i->free_nid_list)) { 1286e05df3b1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1287e05df3b1SJaegeuk Kim kmem_cache_free(free_nid_slab, i); 1288e05df3b1SJaegeuk Kim return 0; 1289e05df3b1SJaegeuk Kim } 1290e05df3b1SJaegeuk Kim list_add_tail(&i->list, &nm_i->free_nid_list); 1291e05df3b1SJaegeuk Kim nm_i->fcnt++; 1292e05df3b1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1293e05df3b1SJaegeuk Kim return 1; 1294e05df3b1SJaegeuk Kim } 1295e05df3b1SJaegeuk Kim 1296e05df3b1SJaegeuk Kim static void remove_free_nid(struct f2fs_nm_info *nm_i, nid_t nid) 1297e05df3b1SJaegeuk Kim { 1298e05df3b1SJaegeuk Kim struct free_nid *i; 1299e05df3b1SJaegeuk Kim spin_lock(&nm_i->free_nid_list_lock); 1300e05df3b1SJaegeuk Kim i = __lookup_free_nid_list(nid, &nm_i->free_nid_list); 1301e05df3b1SJaegeuk Kim if (i && i->state == NID_NEW) { 1302e05df3b1SJaegeuk Kim __del_from_free_nid_list(i); 1303e05df3b1SJaegeuk Kim nm_i->fcnt--; 1304e05df3b1SJaegeuk Kim } 1305e05df3b1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1306e05df3b1SJaegeuk Kim } 1307e05df3b1SJaegeuk Kim 13088760952dSHaicheng Li static void scan_nat_page(struct f2fs_nm_info *nm_i, 1309e05df3b1SJaegeuk Kim struct page *nat_page, nid_t start_nid) 1310e05df3b1SJaegeuk Kim { 1311e05df3b1SJaegeuk Kim struct f2fs_nat_block *nat_blk = page_address(nat_page); 1312e05df3b1SJaegeuk Kim block_t blk_addr; 1313e05df3b1SJaegeuk Kim int i; 1314e05df3b1SJaegeuk Kim 1315e05df3b1SJaegeuk Kim i = start_nid % NAT_ENTRY_PER_BLOCK; 1316e05df3b1SJaegeuk Kim 1317e05df3b1SJaegeuk Kim for (; i < NAT_ENTRY_PER_BLOCK; i++, start_nid++) { 131823d38844SHaicheng Li 131904431c44SJaegeuk Kim if (start_nid >= nm_i->max_nid) 132004431c44SJaegeuk Kim break; 132123d38844SHaicheng Li 1322e05df3b1SJaegeuk Kim blk_addr = le32_to_cpu(nat_blk->entries[i].block_addr); 1323e05df3b1SJaegeuk Kim BUG_ON(blk_addr == NEW_ADDR); 132423d38844SHaicheng Li if (blk_addr == NULL_ADDR) { 132559bbd474SJaegeuk Kim if (add_free_nid(nm_i, start_nid, true) < 0) 132623d38844SHaicheng Li break; 132723d38844SHaicheng Li } 1328e05df3b1SJaegeuk Kim } 1329e05df3b1SJaegeuk Kim } 1330e05df3b1SJaegeuk Kim 1331e05df3b1SJaegeuk Kim static void build_free_nids(struct f2fs_sb_info *sbi) 1332e05df3b1SJaegeuk Kim { 1333e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1334e05df3b1SJaegeuk Kim struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); 1335e05df3b1SJaegeuk Kim struct f2fs_summary_block *sum = curseg->sum_blk; 13368760952dSHaicheng Li int i = 0; 133755008d84SJaegeuk Kim nid_t nid = nm_i->next_scan_nid; 1338e05df3b1SJaegeuk Kim 133955008d84SJaegeuk Kim /* Enough entries */ 134055008d84SJaegeuk Kim if (nm_i->fcnt > NAT_ENTRY_PER_BLOCK) 134155008d84SJaegeuk Kim return; 1342e05df3b1SJaegeuk Kim 134355008d84SJaegeuk Kim /* readahead nat pages to be scanned */ 1344e05df3b1SJaegeuk Kim ra_nat_pages(sbi, nid); 1345e05df3b1SJaegeuk Kim 1346e05df3b1SJaegeuk Kim while (1) { 1347e05df3b1SJaegeuk Kim struct page *page = get_current_nat_page(sbi, nid); 1348e05df3b1SJaegeuk Kim 13498760952dSHaicheng Li scan_nat_page(nm_i, page, nid); 1350e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 1351e05df3b1SJaegeuk Kim 1352e05df3b1SJaegeuk Kim nid += (NAT_ENTRY_PER_BLOCK - (nid % NAT_ENTRY_PER_BLOCK)); 135355008d84SJaegeuk Kim if (nid >= nm_i->max_nid) 1354e05df3b1SJaegeuk Kim nid = 0; 135555008d84SJaegeuk Kim 135655008d84SJaegeuk Kim if (i++ == FREE_NID_PAGES) 1357e05df3b1SJaegeuk Kim break; 1358e05df3b1SJaegeuk Kim } 1359e05df3b1SJaegeuk Kim 136055008d84SJaegeuk Kim /* go to the next free nat pages to find free nids abundantly */ 136155008d84SJaegeuk Kim nm_i->next_scan_nid = nid; 1362e05df3b1SJaegeuk Kim 1363e05df3b1SJaegeuk Kim /* find free nids from current sum_pages */ 1364e05df3b1SJaegeuk Kim mutex_lock(&curseg->curseg_mutex); 1365e05df3b1SJaegeuk Kim for (i = 0; i < nats_in_cursum(sum); i++) { 1366e05df3b1SJaegeuk Kim block_t addr = le32_to_cpu(nat_in_journal(sum, i).block_addr); 1367e05df3b1SJaegeuk Kim nid = le32_to_cpu(nid_in_journal(sum, i)); 1368e05df3b1SJaegeuk Kim if (addr == NULL_ADDR) 136959bbd474SJaegeuk Kim add_free_nid(nm_i, nid, true); 1370e05df3b1SJaegeuk Kim else 1371e05df3b1SJaegeuk Kim remove_free_nid(nm_i, nid); 1372e05df3b1SJaegeuk Kim } 1373e05df3b1SJaegeuk Kim mutex_unlock(&curseg->curseg_mutex); 1374e05df3b1SJaegeuk Kim } 1375e05df3b1SJaegeuk Kim 1376e05df3b1SJaegeuk Kim /* 1377e05df3b1SJaegeuk Kim * If this function returns success, caller can obtain a new nid 1378e05df3b1SJaegeuk Kim * from second parameter of this function. 1379e05df3b1SJaegeuk Kim * The returned nid could be used ino as well as nid when inode is created. 1380e05df3b1SJaegeuk Kim */ 1381e05df3b1SJaegeuk Kim bool alloc_nid(struct f2fs_sb_info *sbi, nid_t *nid) 1382e05df3b1SJaegeuk Kim { 1383e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1384e05df3b1SJaegeuk Kim struct free_nid *i = NULL; 1385e05df3b1SJaegeuk Kim struct list_head *this; 1386e05df3b1SJaegeuk Kim retry: 138755008d84SJaegeuk Kim if (sbi->total_valid_node_count + 1 >= nm_i->max_nid) 1388e05df3b1SJaegeuk Kim return false; 1389e05df3b1SJaegeuk Kim 1390e05df3b1SJaegeuk Kim spin_lock(&nm_i->free_nid_list_lock); 1391e05df3b1SJaegeuk Kim 139255008d84SJaegeuk Kim /* We should not use stale free nids created by build_free_nids */ 139355008d84SJaegeuk Kim if (nm_i->fcnt && !sbi->on_build_free_nids) { 1394e05df3b1SJaegeuk Kim BUG_ON(list_empty(&nm_i->free_nid_list)); 1395e05df3b1SJaegeuk Kim list_for_each(this, &nm_i->free_nid_list) { 1396e05df3b1SJaegeuk Kim i = list_entry(this, struct free_nid, list); 1397e05df3b1SJaegeuk Kim if (i->state == NID_NEW) 1398e05df3b1SJaegeuk Kim break; 1399e05df3b1SJaegeuk Kim } 1400e05df3b1SJaegeuk Kim 1401e05df3b1SJaegeuk Kim BUG_ON(i->state != NID_NEW); 1402e05df3b1SJaegeuk Kim *nid = i->nid; 1403e05df3b1SJaegeuk Kim i->state = NID_ALLOC; 1404e05df3b1SJaegeuk Kim nm_i->fcnt--; 1405e05df3b1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1406e05df3b1SJaegeuk Kim return true; 1407e05df3b1SJaegeuk Kim } 140855008d84SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 140955008d84SJaegeuk Kim 141055008d84SJaegeuk Kim /* Let's scan nat pages and its caches to get free nids */ 141155008d84SJaegeuk Kim mutex_lock(&nm_i->build_lock); 141255008d84SJaegeuk Kim sbi->on_build_free_nids = 1; 141355008d84SJaegeuk Kim build_free_nids(sbi); 141455008d84SJaegeuk Kim sbi->on_build_free_nids = 0; 141555008d84SJaegeuk Kim mutex_unlock(&nm_i->build_lock); 141655008d84SJaegeuk Kim goto retry; 141755008d84SJaegeuk Kim } 1418e05df3b1SJaegeuk Kim 14190a8165d7SJaegeuk Kim /* 1420e05df3b1SJaegeuk Kim * alloc_nid() should be called prior to this function. 1421e05df3b1SJaegeuk Kim */ 1422e05df3b1SJaegeuk Kim void alloc_nid_done(struct f2fs_sb_info *sbi, nid_t nid) 1423e05df3b1SJaegeuk Kim { 1424e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1425e05df3b1SJaegeuk Kim struct free_nid *i; 1426e05df3b1SJaegeuk Kim 1427e05df3b1SJaegeuk Kim spin_lock(&nm_i->free_nid_list_lock); 1428e05df3b1SJaegeuk Kim i = __lookup_free_nid_list(nid, &nm_i->free_nid_list); 142949952fa1SJaegeuk Kim BUG_ON(!i || i->state != NID_ALLOC); 1430e05df3b1SJaegeuk Kim __del_from_free_nid_list(i); 1431e05df3b1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1432e05df3b1SJaegeuk Kim } 1433e05df3b1SJaegeuk Kim 14340a8165d7SJaegeuk Kim /* 1435e05df3b1SJaegeuk Kim * alloc_nid() should be called prior to this function. 1436e05df3b1SJaegeuk Kim */ 1437e05df3b1SJaegeuk Kim void alloc_nid_failed(struct f2fs_sb_info *sbi, nid_t nid) 1438e05df3b1SJaegeuk Kim { 143949952fa1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 144049952fa1SJaegeuk Kim struct free_nid *i; 144149952fa1SJaegeuk Kim 144249952fa1SJaegeuk Kim spin_lock(&nm_i->free_nid_list_lock); 144349952fa1SJaegeuk Kim i = __lookup_free_nid_list(nid, &nm_i->free_nid_list); 144449952fa1SJaegeuk Kim BUG_ON(!i || i->state != NID_ALLOC); 144595630cbaSHaicheng Li if (nm_i->fcnt > 2 * MAX_FREE_NIDS) { 144695630cbaSHaicheng Li __del_from_free_nid_list(i); 144795630cbaSHaicheng Li } else { 144849952fa1SJaegeuk Kim i->state = NID_NEW; 144949952fa1SJaegeuk Kim nm_i->fcnt++; 145095630cbaSHaicheng Li } 145149952fa1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1452e05df3b1SJaegeuk Kim } 1453e05df3b1SJaegeuk Kim 1454e05df3b1SJaegeuk Kim void recover_node_page(struct f2fs_sb_info *sbi, struct page *page, 1455e05df3b1SJaegeuk Kim struct f2fs_summary *sum, struct node_info *ni, 1456e05df3b1SJaegeuk Kim block_t new_blkaddr) 1457e05df3b1SJaegeuk Kim { 1458e05df3b1SJaegeuk Kim rewrite_node_page(sbi, page, sum, ni->blk_addr, new_blkaddr); 1459e05df3b1SJaegeuk Kim set_node_addr(sbi, ni, new_blkaddr); 1460e05df3b1SJaegeuk Kim clear_node_page_dirty(page); 1461e05df3b1SJaegeuk Kim } 1462e05df3b1SJaegeuk Kim 1463e05df3b1SJaegeuk Kim int recover_inode_page(struct f2fs_sb_info *sbi, struct page *page) 1464e05df3b1SJaegeuk Kim { 1465e05df3b1SJaegeuk Kim struct address_space *mapping = sbi->node_inode->i_mapping; 1466e05df3b1SJaegeuk Kim struct f2fs_node *src, *dst; 1467e05df3b1SJaegeuk Kim nid_t ino = ino_of_node(page); 1468e05df3b1SJaegeuk Kim struct node_info old_ni, new_ni; 1469e05df3b1SJaegeuk Kim struct page *ipage; 1470e05df3b1SJaegeuk Kim 1471e05df3b1SJaegeuk Kim ipage = grab_cache_page(mapping, ino); 1472e05df3b1SJaegeuk Kim if (!ipage) 1473e05df3b1SJaegeuk Kim return -ENOMEM; 1474e05df3b1SJaegeuk Kim 1475e05df3b1SJaegeuk Kim /* Should not use this inode from free nid list */ 1476e05df3b1SJaegeuk Kim remove_free_nid(NM_I(sbi), ino); 1477e05df3b1SJaegeuk Kim 1478e05df3b1SJaegeuk Kim get_node_info(sbi, ino, &old_ni); 1479e05df3b1SJaegeuk Kim SetPageUptodate(ipage); 1480e05df3b1SJaegeuk Kim fill_node_footer(ipage, ino, ino, 0, true); 1481e05df3b1SJaegeuk Kim 1482e05df3b1SJaegeuk Kim src = (struct f2fs_node *)page_address(page); 1483e05df3b1SJaegeuk Kim dst = (struct f2fs_node *)page_address(ipage); 1484e05df3b1SJaegeuk Kim 1485e05df3b1SJaegeuk Kim memcpy(dst, src, (unsigned long)&src->i.i_ext - (unsigned long)&src->i); 1486e05df3b1SJaegeuk Kim dst->i.i_size = 0; 148725ca923bSJaegeuk Kim dst->i.i_blocks = cpu_to_le64(1); 148825ca923bSJaegeuk Kim dst->i.i_links = cpu_to_le32(1); 1489e05df3b1SJaegeuk Kim dst->i.i_xattr_nid = 0; 1490e05df3b1SJaegeuk Kim 1491e05df3b1SJaegeuk Kim new_ni = old_ni; 1492e05df3b1SJaegeuk Kim new_ni.ino = ino; 1493e05df3b1SJaegeuk Kim 149465e5cd0aSJaegeuk Kim if (!inc_valid_node_count(sbi, NULL, 1)) 149565e5cd0aSJaegeuk Kim WARN_ON(1); 1496e05df3b1SJaegeuk Kim set_node_addr(sbi, &new_ni, NEW_ADDR); 1497e05df3b1SJaegeuk Kim inc_valid_inode_count(sbi); 1498e05df3b1SJaegeuk Kim 1499e05df3b1SJaegeuk Kim f2fs_put_page(ipage, 1); 1500e05df3b1SJaegeuk Kim return 0; 1501e05df3b1SJaegeuk Kim } 1502e05df3b1SJaegeuk Kim 1503e05df3b1SJaegeuk Kim int restore_node_summary(struct f2fs_sb_info *sbi, 1504e05df3b1SJaegeuk Kim unsigned int segno, struct f2fs_summary_block *sum) 1505e05df3b1SJaegeuk Kim { 1506e05df3b1SJaegeuk Kim struct f2fs_node *rn; 1507e05df3b1SJaegeuk Kim struct f2fs_summary *sum_entry; 1508e05df3b1SJaegeuk Kim struct page *page; 1509e05df3b1SJaegeuk Kim block_t addr; 1510e05df3b1SJaegeuk Kim int i, last_offset; 1511e05df3b1SJaegeuk Kim 1512e05df3b1SJaegeuk Kim /* alloc temporal page for read node */ 1513e05df3b1SJaegeuk Kim page = alloc_page(GFP_NOFS | __GFP_ZERO); 1514e05df3b1SJaegeuk Kim if (IS_ERR(page)) 1515e05df3b1SJaegeuk Kim return PTR_ERR(page); 1516e05df3b1SJaegeuk Kim lock_page(page); 1517e05df3b1SJaegeuk Kim 1518e05df3b1SJaegeuk Kim /* scan the node segment */ 1519e05df3b1SJaegeuk Kim last_offset = sbi->blocks_per_seg; 1520e05df3b1SJaegeuk Kim addr = START_BLOCK(sbi, segno); 1521e05df3b1SJaegeuk Kim sum_entry = &sum->entries[0]; 1522e05df3b1SJaegeuk Kim 1523e05df3b1SJaegeuk Kim for (i = 0; i < last_offset; i++, sum_entry++) { 1524e05df3b1SJaegeuk Kim /* 1525e05df3b1SJaegeuk Kim * In order to read next node page, 1526e05df3b1SJaegeuk Kim * we must clear PageUptodate flag. 1527e05df3b1SJaegeuk Kim */ 1528e05df3b1SJaegeuk Kim ClearPageUptodate(page); 1529393ff91fSJaegeuk Kim 1530393ff91fSJaegeuk Kim if (f2fs_readpage(sbi, page, addr, READ_SYNC)) 1531393ff91fSJaegeuk Kim goto out; 1532393ff91fSJaegeuk Kim 1533393ff91fSJaegeuk Kim lock_page(page); 1534393ff91fSJaegeuk Kim rn = (struct f2fs_node *)page_address(page); 1535393ff91fSJaegeuk Kim sum_entry->nid = rn->footer.nid; 1536393ff91fSJaegeuk Kim sum_entry->version = 0; 1537393ff91fSJaegeuk Kim sum_entry->ofs_in_node = 0; 1538393ff91fSJaegeuk Kim addr++; 1539e05df3b1SJaegeuk Kim } 1540e05df3b1SJaegeuk Kim unlock_page(page); 1541393ff91fSJaegeuk Kim out: 1542e05df3b1SJaegeuk Kim __free_pages(page, 0); 1543e05df3b1SJaegeuk Kim return 0; 1544e05df3b1SJaegeuk Kim } 1545e05df3b1SJaegeuk Kim 1546e05df3b1SJaegeuk Kim static bool flush_nats_in_journal(struct f2fs_sb_info *sbi) 1547e05df3b1SJaegeuk Kim { 1548e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1549e05df3b1SJaegeuk Kim struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); 1550e05df3b1SJaegeuk Kim struct f2fs_summary_block *sum = curseg->sum_blk; 1551e05df3b1SJaegeuk Kim int i; 1552e05df3b1SJaegeuk Kim 1553e05df3b1SJaegeuk Kim mutex_lock(&curseg->curseg_mutex); 1554e05df3b1SJaegeuk Kim 1555e05df3b1SJaegeuk Kim if (nats_in_cursum(sum) < NAT_JOURNAL_ENTRIES) { 1556e05df3b1SJaegeuk Kim mutex_unlock(&curseg->curseg_mutex); 1557e05df3b1SJaegeuk Kim return false; 1558e05df3b1SJaegeuk Kim } 1559e05df3b1SJaegeuk Kim 1560e05df3b1SJaegeuk Kim for (i = 0; i < nats_in_cursum(sum); i++) { 1561e05df3b1SJaegeuk Kim struct nat_entry *ne; 1562e05df3b1SJaegeuk Kim struct f2fs_nat_entry raw_ne; 1563e05df3b1SJaegeuk Kim nid_t nid = le32_to_cpu(nid_in_journal(sum, i)); 1564e05df3b1SJaegeuk Kim 1565e05df3b1SJaegeuk Kim raw_ne = nat_in_journal(sum, i); 1566e05df3b1SJaegeuk Kim retry: 1567e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 1568e05df3b1SJaegeuk Kim ne = __lookup_nat_cache(nm_i, nid); 1569e05df3b1SJaegeuk Kim if (ne) { 1570e05df3b1SJaegeuk Kim __set_nat_cache_dirty(nm_i, ne); 1571e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 1572e05df3b1SJaegeuk Kim continue; 1573e05df3b1SJaegeuk Kim } 1574e05df3b1SJaegeuk Kim ne = grab_nat_entry(nm_i, nid); 1575e05df3b1SJaegeuk Kim if (!ne) { 1576e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 1577e05df3b1SJaegeuk Kim goto retry; 1578e05df3b1SJaegeuk Kim } 1579e05df3b1SJaegeuk Kim nat_set_blkaddr(ne, le32_to_cpu(raw_ne.block_addr)); 1580e05df3b1SJaegeuk Kim nat_set_ino(ne, le32_to_cpu(raw_ne.ino)); 1581e05df3b1SJaegeuk Kim nat_set_version(ne, raw_ne.version); 1582e05df3b1SJaegeuk Kim __set_nat_cache_dirty(nm_i, ne); 1583e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 1584e05df3b1SJaegeuk Kim } 1585e05df3b1SJaegeuk Kim update_nats_in_cursum(sum, -i); 1586e05df3b1SJaegeuk Kim mutex_unlock(&curseg->curseg_mutex); 1587e05df3b1SJaegeuk Kim return true; 1588e05df3b1SJaegeuk Kim } 1589e05df3b1SJaegeuk Kim 15900a8165d7SJaegeuk Kim /* 1591e05df3b1SJaegeuk Kim * This function is called during the checkpointing process. 1592e05df3b1SJaegeuk Kim */ 1593e05df3b1SJaegeuk Kim void flush_nat_entries(struct f2fs_sb_info *sbi) 1594e05df3b1SJaegeuk Kim { 1595e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1596e05df3b1SJaegeuk Kim struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); 1597e05df3b1SJaegeuk Kim struct f2fs_summary_block *sum = curseg->sum_blk; 1598e05df3b1SJaegeuk Kim struct list_head *cur, *n; 1599e05df3b1SJaegeuk Kim struct page *page = NULL; 1600e05df3b1SJaegeuk Kim struct f2fs_nat_block *nat_blk = NULL; 1601e05df3b1SJaegeuk Kim nid_t start_nid = 0, end_nid = 0; 1602e05df3b1SJaegeuk Kim bool flushed; 1603e05df3b1SJaegeuk Kim 1604e05df3b1SJaegeuk Kim flushed = flush_nats_in_journal(sbi); 1605e05df3b1SJaegeuk Kim 1606e05df3b1SJaegeuk Kim if (!flushed) 1607e05df3b1SJaegeuk Kim mutex_lock(&curseg->curseg_mutex); 1608e05df3b1SJaegeuk Kim 1609e05df3b1SJaegeuk Kim /* 1) flush dirty nat caches */ 1610e05df3b1SJaegeuk Kim list_for_each_safe(cur, n, &nm_i->dirty_nat_entries) { 1611e05df3b1SJaegeuk Kim struct nat_entry *ne; 1612e05df3b1SJaegeuk Kim nid_t nid; 1613e05df3b1SJaegeuk Kim struct f2fs_nat_entry raw_ne; 1614e05df3b1SJaegeuk Kim int offset = -1; 16152b50638dSJaegeuk Kim block_t new_blkaddr; 1616e05df3b1SJaegeuk Kim 1617e05df3b1SJaegeuk Kim ne = list_entry(cur, struct nat_entry, list); 1618e05df3b1SJaegeuk Kim nid = nat_get_nid(ne); 1619e05df3b1SJaegeuk Kim 1620e05df3b1SJaegeuk Kim if (nat_get_blkaddr(ne) == NEW_ADDR) 1621e05df3b1SJaegeuk Kim continue; 1622e05df3b1SJaegeuk Kim if (flushed) 1623e05df3b1SJaegeuk Kim goto to_nat_page; 1624e05df3b1SJaegeuk Kim 1625e05df3b1SJaegeuk Kim /* if there is room for nat enries in curseg->sumpage */ 1626e05df3b1SJaegeuk Kim offset = lookup_journal_in_cursum(sum, NAT_JOURNAL, nid, 1); 1627e05df3b1SJaegeuk Kim if (offset >= 0) { 1628e05df3b1SJaegeuk Kim raw_ne = nat_in_journal(sum, offset); 1629e05df3b1SJaegeuk Kim goto flush_now; 1630e05df3b1SJaegeuk Kim } 1631e05df3b1SJaegeuk Kim to_nat_page: 1632e05df3b1SJaegeuk Kim if (!page || (start_nid > nid || nid > end_nid)) { 1633e05df3b1SJaegeuk Kim if (page) { 1634e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 1635e05df3b1SJaegeuk Kim page = NULL; 1636e05df3b1SJaegeuk Kim } 1637e05df3b1SJaegeuk Kim start_nid = START_NID(nid); 1638e05df3b1SJaegeuk Kim end_nid = start_nid + NAT_ENTRY_PER_BLOCK - 1; 1639e05df3b1SJaegeuk Kim 1640e05df3b1SJaegeuk Kim /* 1641e05df3b1SJaegeuk Kim * get nat block with dirty flag, increased reference 1642e05df3b1SJaegeuk Kim * count, mapped and lock 1643e05df3b1SJaegeuk Kim */ 1644e05df3b1SJaegeuk Kim page = get_next_nat_page(sbi, start_nid); 1645e05df3b1SJaegeuk Kim nat_blk = page_address(page); 1646e05df3b1SJaegeuk Kim } 1647e05df3b1SJaegeuk Kim 1648e05df3b1SJaegeuk Kim BUG_ON(!nat_blk); 1649e05df3b1SJaegeuk Kim raw_ne = nat_blk->entries[nid - start_nid]; 1650e05df3b1SJaegeuk Kim flush_now: 1651e05df3b1SJaegeuk Kim new_blkaddr = nat_get_blkaddr(ne); 1652e05df3b1SJaegeuk Kim 1653e05df3b1SJaegeuk Kim raw_ne.ino = cpu_to_le32(nat_get_ino(ne)); 1654e05df3b1SJaegeuk Kim raw_ne.block_addr = cpu_to_le32(new_blkaddr); 1655e05df3b1SJaegeuk Kim raw_ne.version = nat_get_version(ne); 1656e05df3b1SJaegeuk Kim 1657e05df3b1SJaegeuk Kim if (offset < 0) { 1658e05df3b1SJaegeuk Kim nat_blk->entries[nid - start_nid] = raw_ne; 1659e05df3b1SJaegeuk Kim } else { 1660e05df3b1SJaegeuk Kim nat_in_journal(sum, offset) = raw_ne; 1661e05df3b1SJaegeuk Kim nid_in_journal(sum, offset) = cpu_to_le32(nid); 1662e05df3b1SJaegeuk Kim } 1663e05df3b1SJaegeuk Kim 1664fa372417SJaegeuk Kim if (nat_get_blkaddr(ne) == NULL_ADDR && 166559bbd474SJaegeuk Kim add_free_nid(NM_I(sbi), nid, false) <= 0) { 1666e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 1667e05df3b1SJaegeuk Kim __del_from_nat_cache(nm_i, ne); 1668e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 1669e05df3b1SJaegeuk Kim } else { 1670e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 1671e05df3b1SJaegeuk Kim __clear_nat_cache_dirty(nm_i, ne); 1672e05df3b1SJaegeuk Kim ne->checkpointed = true; 1673e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 1674e05df3b1SJaegeuk Kim } 1675e05df3b1SJaegeuk Kim } 1676e05df3b1SJaegeuk Kim if (!flushed) 1677e05df3b1SJaegeuk Kim mutex_unlock(&curseg->curseg_mutex); 1678e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 1679e05df3b1SJaegeuk Kim 1680e05df3b1SJaegeuk Kim /* 2) shrink nat caches if necessary */ 1681e05df3b1SJaegeuk Kim try_to_free_nats(sbi, nm_i->nat_cnt - NM_WOUT_THRESHOLD); 1682e05df3b1SJaegeuk Kim } 1683e05df3b1SJaegeuk Kim 1684e05df3b1SJaegeuk Kim static int init_node_manager(struct f2fs_sb_info *sbi) 1685e05df3b1SJaegeuk Kim { 1686e05df3b1SJaegeuk Kim struct f2fs_super_block *sb_raw = F2FS_RAW_SUPER(sbi); 1687e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1688e05df3b1SJaegeuk Kim unsigned char *version_bitmap; 1689e05df3b1SJaegeuk Kim unsigned int nat_segs, nat_blocks; 1690e05df3b1SJaegeuk Kim 1691e05df3b1SJaegeuk Kim nm_i->nat_blkaddr = le32_to_cpu(sb_raw->nat_blkaddr); 1692e05df3b1SJaegeuk Kim 1693e05df3b1SJaegeuk Kim /* segment_count_nat includes pair segment so divide to 2. */ 1694e05df3b1SJaegeuk Kim nat_segs = le32_to_cpu(sb_raw->segment_count_nat) >> 1; 1695e05df3b1SJaegeuk Kim nat_blocks = nat_segs << le32_to_cpu(sb_raw->log_blocks_per_seg); 1696e05df3b1SJaegeuk Kim nm_i->max_nid = NAT_ENTRY_PER_BLOCK * nat_blocks; 1697e05df3b1SJaegeuk Kim nm_i->fcnt = 0; 1698e05df3b1SJaegeuk Kim nm_i->nat_cnt = 0; 1699e05df3b1SJaegeuk Kim 1700e05df3b1SJaegeuk Kim INIT_LIST_HEAD(&nm_i->free_nid_list); 1701e05df3b1SJaegeuk Kim INIT_RADIX_TREE(&nm_i->nat_root, GFP_ATOMIC); 1702e05df3b1SJaegeuk Kim INIT_LIST_HEAD(&nm_i->nat_entries); 1703e05df3b1SJaegeuk Kim INIT_LIST_HEAD(&nm_i->dirty_nat_entries); 1704e05df3b1SJaegeuk Kim 1705e05df3b1SJaegeuk Kim mutex_init(&nm_i->build_lock); 1706e05df3b1SJaegeuk Kim spin_lock_init(&nm_i->free_nid_list_lock); 1707e05df3b1SJaegeuk Kim rwlock_init(&nm_i->nat_tree_lock); 1708e05df3b1SJaegeuk Kim 1709e05df3b1SJaegeuk Kim nm_i->next_scan_nid = le32_to_cpu(sbi->ckpt->next_free_nid); 171079b5793bSAlexandru Gheorghiu nm_i->bitmap_size = __bitmap_size(sbi, NAT_BITMAP); 1711e05df3b1SJaegeuk Kim version_bitmap = __bitmap_ptr(sbi, NAT_BITMAP); 1712e05df3b1SJaegeuk Kim if (!version_bitmap) 1713e05df3b1SJaegeuk Kim return -EFAULT; 1714e05df3b1SJaegeuk Kim 171579b5793bSAlexandru Gheorghiu nm_i->nat_bitmap = kmemdup(version_bitmap, nm_i->bitmap_size, 171679b5793bSAlexandru Gheorghiu GFP_KERNEL); 171779b5793bSAlexandru Gheorghiu if (!nm_i->nat_bitmap) 171879b5793bSAlexandru Gheorghiu return -ENOMEM; 1719e05df3b1SJaegeuk Kim return 0; 1720e05df3b1SJaegeuk Kim } 1721e05df3b1SJaegeuk Kim 1722e05df3b1SJaegeuk Kim int build_node_manager(struct f2fs_sb_info *sbi) 1723e05df3b1SJaegeuk Kim { 1724e05df3b1SJaegeuk Kim int err; 1725e05df3b1SJaegeuk Kim 1726e05df3b1SJaegeuk Kim sbi->nm_info = kzalloc(sizeof(struct f2fs_nm_info), GFP_KERNEL); 1727e05df3b1SJaegeuk Kim if (!sbi->nm_info) 1728e05df3b1SJaegeuk Kim return -ENOMEM; 1729e05df3b1SJaegeuk Kim 1730e05df3b1SJaegeuk Kim err = init_node_manager(sbi); 1731e05df3b1SJaegeuk Kim if (err) 1732e05df3b1SJaegeuk Kim return err; 1733e05df3b1SJaegeuk Kim 1734e05df3b1SJaegeuk Kim build_free_nids(sbi); 1735e05df3b1SJaegeuk Kim return 0; 1736e05df3b1SJaegeuk Kim } 1737e05df3b1SJaegeuk Kim 1738e05df3b1SJaegeuk Kim void destroy_node_manager(struct f2fs_sb_info *sbi) 1739e05df3b1SJaegeuk Kim { 1740e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1741e05df3b1SJaegeuk Kim struct free_nid *i, *next_i; 1742e05df3b1SJaegeuk Kim struct nat_entry *natvec[NATVEC_SIZE]; 1743e05df3b1SJaegeuk Kim nid_t nid = 0; 1744e05df3b1SJaegeuk Kim unsigned int found; 1745e05df3b1SJaegeuk Kim 1746e05df3b1SJaegeuk Kim if (!nm_i) 1747e05df3b1SJaegeuk Kim return; 1748e05df3b1SJaegeuk Kim 1749e05df3b1SJaegeuk Kim /* destroy free nid list */ 1750e05df3b1SJaegeuk Kim spin_lock(&nm_i->free_nid_list_lock); 1751e05df3b1SJaegeuk Kim list_for_each_entry_safe(i, next_i, &nm_i->free_nid_list, list) { 1752e05df3b1SJaegeuk Kim BUG_ON(i->state == NID_ALLOC); 1753e05df3b1SJaegeuk Kim __del_from_free_nid_list(i); 1754e05df3b1SJaegeuk Kim nm_i->fcnt--; 1755e05df3b1SJaegeuk Kim } 1756e05df3b1SJaegeuk Kim BUG_ON(nm_i->fcnt); 1757e05df3b1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1758e05df3b1SJaegeuk Kim 1759e05df3b1SJaegeuk Kim /* destroy nat cache */ 1760e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 1761e05df3b1SJaegeuk Kim while ((found = __gang_lookup_nat_cache(nm_i, 1762e05df3b1SJaegeuk Kim nid, NATVEC_SIZE, natvec))) { 1763e05df3b1SJaegeuk Kim unsigned idx; 1764e05df3b1SJaegeuk Kim for (idx = 0; idx < found; idx++) { 1765e05df3b1SJaegeuk Kim struct nat_entry *e = natvec[idx]; 1766e05df3b1SJaegeuk Kim nid = nat_get_nid(e) + 1; 1767e05df3b1SJaegeuk Kim __del_from_nat_cache(nm_i, e); 1768e05df3b1SJaegeuk Kim } 1769e05df3b1SJaegeuk Kim } 1770e05df3b1SJaegeuk Kim BUG_ON(nm_i->nat_cnt); 1771e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 1772e05df3b1SJaegeuk Kim 1773e05df3b1SJaegeuk Kim kfree(nm_i->nat_bitmap); 1774e05df3b1SJaegeuk Kim sbi->nm_info = NULL; 1775e05df3b1SJaegeuk Kim kfree(nm_i); 1776e05df3b1SJaegeuk Kim } 1777e05df3b1SJaegeuk Kim 17786e6093a8SNamjae Jeon int __init create_node_manager_caches(void) 1779e05df3b1SJaegeuk Kim { 1780e05df3b1SJaegeuk Kim nat_entry_slab = f2fs_kmem_cache_create("nat_entry", 1781e05df3b1SJaegeuk Kim sizeof(struct nat_entry), NULL); 1782e05df3b1SJaegeuk Kim if (!nat_entry_slab) 1783e05df3b1SJaegeuk Kim return -ENOMEM; 1784e05df3b1SJaegeuk Kim 1785e05df3b1SJaegeuk Kim free_nid_slab = f2fs_kmem_cache_create("free_nid", 1786e05df3b1SJaegeuk Kim sizeof(struct free_nid), NULL); 1787e05df3b1SJaegeuk Kim if (!free_nid_slab) { 1788e05df3b1SJaegeuk Kim kmem_cache_destroy(nat_entry_slab); 1789e05df3b1SJaegeuk Kim return -ENOMEM; 1790e05df3b1SJaegeuk Kim } 1791e05df3b1SJaegeuk Kim return 0; 1792e05df3b1SJaegeuk Kim } 1793e05df3b1SJaegeuk Kim 1794e05df3b1SJaegeuk Kim void destroy_node_manager_caches(void) 1795e05df3b1SJaegeuk Kim { 1796e05df3b1SJaegeuk Kim kmem_cache_destroy(free_nid_slab); 1797e05df3b1SJaegeuk Kim kmem_cache_destroy(nat_entry_slab); 1798e05df3b1SJaegeuk Kim } 1799