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; 28e05df3b1SJaegeuk Kim 29e05df3b1SJaegeuk Kim static void clear_node_page_dirty(struct page *page) 30e05df3b1SJaegeuk Kim { 31e05df3b1SJaegeuk Kim struct address_space *mapping = page->mapping; 32e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(mapping->host->i_sb); 33e05df3b1SJaegeuk Kim unsigned int long flags; 34e05df3b1SJaegeuk Kim 35e05df3b1SJaegeuk Kim if (PageDirty(page)) { 36e05df3b1SJaegeuk Kim spin_lock_irqsave(&mapping->tree_lock, flags); 37e05df3b1SJaegeuk Kim radix_tree_tag_clear(&mapping->page_tree, 38e05df3b1SJaegeuk Kim page_index(page), 39e05df3b1SJaegeuk Kim PAGECACHE_TAG_DIRTY); 40e05df3b1SJaegeuk Kim spin_unlock_irqrestore(&mapping->tree_lock, flags); 41e05df3b1SJaegeuk Kim 42e05df3b1SJaegeuk Kim clear_page_dirty_for_io(page); 43e05df3b1SJaegeuk Kim dec_page_count(sbi, F2FS_DIRTY_NODES); 44e05df3b1SJaegeuk Kim } 45e05df3b1SJaegeuk Kim ClearPageUptodate(page); 46e05df3b1SJaegeuk Kim } 47e05df3b1SJaegeuk Kim 48e05df3b1SJaegeuk Kim static struct page *get_current_nat_page(struct f2fs_sb_info *sbi, nid_t nid) 49e05df3b1SJaegeuk Kim { 50e05df3b1SJaegeuk Kim pgoff_t index = current_nat_addr(sbi, nid); 51e05df3b1SJaegeuk Kim return get_meta_page(sbi, index); 52e05df3b1SJaegeuk Kim } 53e05df3b1SJaegeuk Kim 54e05df3b1SJaegeuk Kim static struct page *get_next_nat_page(struct f2fs_sb_info *sbi, nid_t nid) 55e05df3b1SJaegeuk Kim { 56e05df3b1SJaegeuk Kim struct page *src_page; 57e05df3b1SJaegeuk Kim struct page *dst_page; 58e05df3b1SJaegeuk Kim pgoff_t src_off; 59e05df3b1SJaegeuk Kim pgoff_t dst_off; 60e05df3b1SJaegeuk Kim void *src_addr; 61e05df3b1SJaegeuk Kim void *dst_addr; 62e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 63e05df3b1SJaegeuk Kim 64e05df3b1SJaegeuk Kim src_off = current_nat_addr(sbi, nid); 65e05df3b1SJaegeuk Kim dst_off = next_nat_addr(sbi, src_off); 66e05df3b1SJaegeuk Kim 67e05df3b1SJaegeuk Kim /* get current nat block page with lock */ 68e05df3b1SJaegeuk Kim src_page = get_meta_page(sbi, src_off); 69e05df3b1SJaegeuk Kim 70e05df3b1SJaegeuk Kim /* Dirty src_page means that it is already the new target NAT page. */ 71e05df3b1SJaegeuk Kim if (PageDirty(src_page)) 72e05df3b1SJaegeuk Kim return src_page; 73e05df3b1SJaegeuk Kim 74e05df3b1SJaegeuk Kim dst_page = grab_meta_page(sbi, dst_off); 75e05df3b1SJaegeuk Kim 76e05df3b1SJaegeuk Kim src_addr = page_address(src_page); 77e05df3b1SJaegeuk Kim dst_addr = page_address(dst_page); 78e05df3b1SJaegeuk Kim memcpy(dst_addr, src_addr, PAGE_CACHE_SIZE); 79e05df3b1SJaegeuk Kim set_page_dirty(dst_page); 80e05df3b1SJaegeuk Kim f2fs_put_page(src_page, 1); 81e05df3b1SJaegeuk Kim 82e05df3b1SJaegeuk Kim set_to_next_nat(nm_i, nid); 83e05df3b1SJaegeuk Kim 84e05df3b1SJaegeuk Kim return dst_page; 85e05df3b1SJaegeuk Kim } 86e05df3b1SJaegeuk Kim 87e05df3b1SJaegeuk Kim static struct nat_entry *__lookup_nat_cache(struct f2fs_nm_info *nm_i, nid_t n) 88e05df3b1SJaegeuk Kim { 89e05df3b1SJaegeuk Kim return radix_tree_lookup(&nm_i->nat_root, n); 90e05df3b1SJaegeuk Kim } 91e05df3b1SJaegeuk Kim 92e05df3b1SJaegeuk Kim static unsigned int __gang_lookup_nat_cache(struct f2fs_nm_info *nm_i, 93e05df3b1SJaegeuk Kim nid_t start, unsigned int nr, struct nat_entry **ep) 94e05df3b1SJaegeuk Kim { 95e05df3b1SJaegeuk Kim return radix_tree_gang_lookup(&nm_i->nat_root, (void **)ep, start, nr); 96e05df3b1SJaegeuk Kim } 97e05df3b1SJaegeuk Kim 98e05df3b1SJaegeuk Kim static void __del_from_nat_cache(struct f2fs_nm_info *nm_i, struct nat_entry *e) 99e05df3b1SJaegeuk Kim { 100e05df3b1SJaegeuk Kim list_del(&e->list); 101e05df3b1SJaegeuk Kim radix_tree_delete(&nm_i->nat_root, nat_get_nid(e)); 102e05df3b1SJaegeuk Kim nm_i->nat_cnt--; 103e05df3b1SJaegeuk Kim kmem_cache_free(nat_entry_slab, e); 104e05df3b1SJaegeuk Kim } 105e05df3b1SJaegeuk Kim 106e05df3b1SJaegeuk Kim int is_checkpointed_node(struct f2fs_sb_info *sbi, nid_t nid) 107e05df3b1SJaegeuk Kim { 108e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 109e05df3b1SJaegeuk Kim struct nat_entry *e; 110e05df3b1SJaegeuk Kim int is_cp = 1; 111e05df3b1SJaegeuk Kim 112e05df3b1SJaegeuk Kim read_lock(&nm_i->nat_tree_lock); 113e05df3b1SJaegeuk Kim e = __lookup_nat_cache(nm_i, nid); 114e05df3b1SJaegeuk Kim if (e && !e->checkpointed) 115e05df3b1SJaegeuk Kim is_cp = 0; 116e05df3b1SJaegeuk Kim read_unlock(&nm_i->nat_tree_lock); 117e05df3b1SJaegeuk Kim return is_cp; 118e05df3b1SJaegeuk Kim } 119e05df3b1SJaegeuk Kim 120e05df3b1SJaegeuk Kim static struct nat_entry *grab_nat_entry(struct f2fs_nm_info *nm_i, nid_t nid) 121e05df3b1SJaegeuk Kim { 122e05df3b1SJaegeuk Kim struct nat_entry *new; 123e05df3b1SJaegeuk Kim 124e05df3b1SJaegeuk Kim new = kmem_cache_alloc(nat_entry_slab, GFP_ATOMIC); 125e05df3b1SJaegeuk Kim if (!new) 126e05df3b1SJaegeuk Kim return NULL; 127e05df3b1SJaegeuk Kim if (radix_tree_insert(&nm_i->nat_root, nid, new)) { 128e05df3b1SJaegeuk Kim kmem_cache_free(nat_entry_slab, new); 129e05df3b1SJaegeuk Kim return NULL; 130e05df3b1SJaegeuk Kim } 131e05df3b1SJaegeuk Kim memset(new, 0, sizeof(struct nat_entry)); 132e05df3b1SJaegeuk Kim nat_set_nid(new, nid); 133fffc2a00SJaegeuk Kim new->checkpointed = true; 134e05df3b1SJaegeuk Kim list_add_tail(&new->list, &nm_i->nat_entries); 135e05df3b1SJaegeuk Kim nm_i->nat_cnt++; 136e05df3b1SJaegeuk Kim return new; 137e05df3b1SJaegeuk Kim } 138e05df3b1SJaegeuk Kim 139e05df3b1SJaegeuk Kim static void cache_nat_entry(struct f2fs_nm_info *nm_i, nid_t nid, 140e05df3b1SJaegeuk Kim struct f2fs_nat_entry *ne) 141e05df3b1SJaegeuk Kim { 142e05df3b1SJaegeuk Kim struct nat_entry *e; 143e05df3b1SJaegeuk Kim retry: 144e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 145e05df3b1SJaegeuk Kim e = __lookup_nat_cache(nm_i, nid); 146e05df3b1SJaegeuk Kim if (!e) { 147e05df3b1SJaegeuk Kim e = grab_nat_entry(nm_i, nid); 148e05df3b1SJaegeuk Kim if (!e) { 149e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 150e05df3b1SJaegeuk Kim goto retry; 151e05df3b1SJaegeuk Kim } 152e05df3b1SJaegeuk Kim nat_set_blkaddr(e, le32_to_cpu(ne->block_addr)); 153e05df3b1SJaegeuk Kim nat_set_ino(e, le32_to_cpu(ne->ino)); 154e05df3b1SJaegeuk Kim nat_set_version(e, ne->version); 155e05df3b1SJaegeuk Kim } 156e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 157e05df3b1SJaegeuk Kim } 158e05df3b1SJaegeuk Kim 159e05df3b1SJaegeuk Kim static void set_node_addr(struct f2fs_sb_info *sbi, struct node_info *ni, 160e05df3b1SJaegeuk Kim block_t new_blkaddr) 161e05df3b1SJaegeuk Kim { 162e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 163e05df3b1SJaegeuk Kim struct nat_entry *e; 164e05df3b1SJaegeuk Kim retry: 165e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 166e05df3b1SJaegeuk Kim e = __lookup_nat_cache(nm_i, ni->nid); 167e05df3b1SJaegeuk Kim if (!e) { 168e05df3b1SJaegeuk Kim e = grab_nat_entry(nm_i, ni->nid); 169e05df3b1SJaegeuk Kim if (!e) { 170e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 171e05df3b1SJaegeuk Kim goto retry; 172e05df3b1SJaegeuk Kim } 173e05df3b1SJaegeuk Kim e->ni = *ni; 1745d56b671SJaegeuk Kim f2fs_bug_on(ni->blk_addr == NEW_ADDR); 175e05df3b1SJaegeuk Kim } else if (new_blkaddr == NEW_ADDR) { 176e05df3b1SJaegeuk Kim /* 177e05df3b1SJaegeuk Kim * when nid is reallocated, 178e05df3b1SJaegeuk Kim * previous nat entry can be remained in nat cache. 179e05df3b1SJaegeuk Kim * So, reinitialize it with new information. 180e05df3b1SJaegeuk Kim */ 181e05df3b1SJaegeuk Kim e->ni = *ni; 1825d56b671SJaegeuk Kim f2fs_bug_on(ni->blk_addr != NULL_ADDR); 183e05df3b1SJaegeuk Kim } 184e05df3b1SJaegeuk Kim 185e05df3b1SJaegeuk Kim /* sanity check */ 1865d56b671SJaegeuk Kim f2fs_bug_on(nat_get_blkaddr(e) != ni->blk_addr); 1875d56b671SJaegeuk Kim f2fs_bug_on(nat_get_blkaddr(e) == NULL_ADDR && 188e05df3b1SJaegeuk Kim new_blkaddr == NULL_ADDR); 1895d56b671SJaegeuk Kim f2fs_bug_on(nat_get_blkaddr(e) == NEW_ADDR && 190e05df3b1SJaegeuk Kim new_blkaddr == NEW_ADDR); 1915d56b671SJaegeuk Kim f2fs_bug_on(nat_get_blkaddr(e) != NEW_ADDR && 192e05df3b1SJaegeuk Kim nat_get_blkaddr(e) != NULL_ADDR && 193e05df3b1SJaegeuk Kim new_blkaddr == NEW_ADDR); 194e05df3b1SJaegeuk Kim 195e05df3b1SJaegeuk Kim /* increament version no as node is removed */ 196e05df3b1SJaegeuk Kim if (nat_get_blkaddr(e) != NEW_ADDR && new_blkaddr == NULL_ADDR) { 197e05df3b1SJaegeuk Kim unsigned char version = nat_get_version(e); 198e05df3b1SJaegeuk Kim nat_set_version(e, inc_node_version(version)); 199e05df3b1SJaegeuk Kim } 200e05df3b1SJaegeuk Kim 201e05df3b1SJaegeuk Kim /* change address */ 202e05df3b1SJaegeuk Kim nat_set_blkaddr(e, new_blkaddr); 203e05df3b1SJaegeuk Kim __set_nat_cache_dirty(nm_i, e); 204e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 205e05df3b1SJaegeuk Kim } 206e05df3b1SJaegeuk Kim 2074660f9c0SJaegeuk Kim int try_to_free_nats(struct f2fs_sb_info *sbi, int nr_shrink) 208e05df3b1SJaegeuk Kim { 209e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 210e05df3b1SJaegeuk Kim 2116cac3759SHaicheng Li if (nm_i->nat_cnt <= NM_WOUT_THRESHOLD) 212e05df3b1SJaegeuk Kim return 0; 213e05df3b1SJaegeuk Kim 214e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 215e05df3b1SJaegeuk Kim while (nr_shrink && !list_empty(&nm_i->nat_entries)) { 216e05df3b1SJaegeuk Kim struct nat_entry *ne; 217e05df3b1SJaegeuk Kim ne = list_first_entry(&nm_i->nat_entries, 218e05df3b1SJaegeuk Kim struct nat_entry, list); 219e05df3b1SJaegeuk Kim __del_from_nat_cache(nm_i, ne); 220e05df3b1SJaegeuk Kim nr_shrink--; 221e05df3b1SJaegeuk Kim } 222e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 223e05df3b1SJaegeuk Kim return nr_shrink; 224e05df3b1SJaegeuk Kim } 225e05df3b1SJaegeuk Kim 2260a8165d7SJaegeuk Kim /* 227e05df3b1SJaegeuk Kim * This function returns always success 228e05df3b1SJaegeuk Kim */ 229e05df3b1SJaegeuk Kim void get_node_info(struct f2fs_sb_info *sbi, nid_t nid, struct node_info *ni) 230e05df3b1SJaegeuk Kim { 231e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 232e05df3b1SJaegeuk Kim struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); 233e05df3b1SJaegeuk Kim struct f2fs_summary_block *sum = curseg->sum_blk; 234e05df3b1SJaegeuk Kim nid_t start_nid = START_NID(nid); 235e05df3b1SJaegeuk Kim struct f2fs_nat_block *nat_blk; 236e05df3b1SJaegeuk Kim struct page *page = NULL; 237e05df3b1SJaegeuk Kim struct f2fs_nat_entry ne; 238e05df3b1SJaegeuk Kim struct nat_entry *e; 239e05df3b1SJaegeuk Kim int i; 240e05df3b1SJaegeuk Kim 241be4124f8SNamjae Jeon memset(&ne, 0, sizeof(struct f2fs_nat_entry)); 242e05df3b1SJaegeuk Kim ni->nid = nid; 243e05df3b1SJaegeuk Kim 244e05df3b1SJaegeuk Kim /* Check nat cache */ 245e05df3b1SJaegeuk Kim read_lock(&nm_i->nat_tree_lock); 246e05df3b1SJaegeuk Kim e = __lookup_nat_cache(nm_i, nid); 247e05df3b1SJaegeuk Kim if (e) { 248e05df3b1SJaegeuk Kim ni->ino = nat_get_ino(e); 249e05df3b1SJaegeuk Kim ni->blk_addr = nat_get_blkaddr(e); 250e05df3b1SJaegeuk Kim ni->version = nat_get_version(e); 251e05df3b1SJaegeuk Kim } 252e05df3b1SJaegeuk Kim read_unlock(&nm_i->nat_tree_lock); 253e05df3b1SJaegeuk Kim if (e) 254e05df3b1SJaegeuk Kim return; 255e05df3b1SJaegeuk Kim 256e05df3b1SJaegeuk Kim /* Check current segment summary */ 257e05df3b1SJaegeuk Kim mutex_lock(&curseg->curseg_mutex); 258e05df3b1SJaegeuk Kim i = lookup_journal_in_cursum(sum, NAT_JOURNAL, nid, 0); 259e05df3b1SJaegeuk Kim if (i >= 0) { 260e05df3b1SJaegeuk Kim ne = nat_in_journal(sum, i); 261e05df3b1SJaegeuk Kim node_info_from_raw_nat(ni, &ne); 262e05df3b1SJaegeuk Kim } 263e05df3b1SJaegeuk Kim mutex_unlock(&curseg->curseg_mutex); 264e05df3b1SJaegeuk Kim if (i >= 0) 265e05df3b1SJaegeuk Kim goto cache; 266e05df3b1SJaegeuk Kim 267e05df3b1SJaegeuk Kim /* Fill node_info from nat page */ 268e05df3b1SJaegeuk Kim page = get_current_nat_page(sbi, start_nid); 269e05df3b1SJaegeuk Kim nat_blk = (struct f2fs_nat_block *)page_address(page); 270e05df3b1SJaegeuk Kim ne = nat_blk->entries[nid - start_nid]; 271e05df3b1SJaegeuk Kim node_info_from_raw_nat(ni, &ne); 272e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 273e05df3b1SJaegeuk Kim cache: 274e05df3b1SJaegeuk Kim /* cache nat entry */ 275e05df3b1SJaegeuk Kim cache_nat_entry(NM_I(sbi), nid, &ne); 276e05df3b1SJaegeuk Kim } 277e05df3b1SJaegeuk Kim 2780a8165d7SJaegeuk Kim /* 279e05df3b1SJaegeuk Kim * The maximum depth is four. 280e05df3b1SJaegeuk Kim * Offset[0] will have raw inode offset. 281e05df3b1SJaegeuk Kim */ 282de93653fSJaegeuk Kim static int get_node_path(struct f2fs_inode_info *fi, long block, 283de93653fSJaegeuk Kim int offset[4], unsigned int noffset[4]) 284e05df3b1SJaegeuk Kim { 285de93653fSJaegeuk Kim const long direct_index = ADDRS_PER_INODE(fi); 286e05df3b1SJaegeuk Kim const long direct_blks = ADDRS_PER_BLOCK; 287e05df3b1SJaegeuk Kim const long dptrs_per_blk = NIDS_PER_BLOCK; 288e05df3b1SJaegeuk Kim const long indirect_blks = ADDRS_PER_BLOCK * NIDS_PER_BLOCK; 289e05df3b1SJaegeuk Kim const long dindirect_blks = indirect_blks * NIDS_PER_BLOCK; 290e05df3b1SJaegeuk Kim int n = 0; 291e05df3b1SJaegeuk Kim int level = 0; 292e05df3b1SJaegeuk Kim 293e05df3b1SJaegeuk Kim noffset[0] = 0; 294e05df3b1SJaegeuk Kim 295e05df3b1SJaegeuk Kim if (block < direct_index) { 29625c0a6e5SNamjae Jeon offset[n] = block; 297e05df3b1SJaegeuk Kim goto got; 298e05df3b1SJaegeuk Kim } 299e05df3b1SJaegeuk Kim block -= direct_index; 300e05df3b1SJaegeuk Kim if (block < direct_blks) { 301e05df3b1SJaegeuk Kim offset[n++] = NODE_DIR1_BLOCK; 302e05df3b1SJaegeuk Kim noffset[n] = 1; 30325c0a6e5SNamjae Jeon offset[n] = block; 304e05df3b1SJaegeuk Kim level = 1; 305e05df3b1SJaegeuk Kim goto got; 306e05df3b1SJaegeuk Kim } 307e05df3b1SJaegeuk Kim block -= direct_blks; 308e05df3b1SJaegeuk Kim if (block < direct_blks) { 309e05df3b1SJaegeuk Kim offset[n++] = NODE_DIR2_BLOCK; 310e05df3b1SJaegeuk Kim noffset[n] = 2; 31125c0a6e5SNamjae Jeon offset[n] = block; 312e05df3b1SJaegeuk Kim level = 1; 313e05df3b1SJaegeuk Kim goto got; 314e05df3b1SJaegeuk Kim } 315e05df3b1SJaegeuk Kim block -= direct_blks; 316e05df3b1SJaegeuk Kim if (block < indirect_blks) { 317e05df3b1SJaegeuk Kim offset[n++] = NODE_IND1_BLOCK; 318e05df3b1SJaegeuk Kim noffset[n] = 3; 319e05df3b1SJaegeuk Kim offset[n++] = block / direct_blks; 320e05df3b1SJaegeuk Kim noffset[n] = 4 + offset[n - 1]; 32125c0a6e5SNamjae Jeon offset[n] = block % direct_blks; 322e05df3b1SJaegeuk Kim level = 2; 323e05df3b1SJaegeuk Kim goto got; 324e05df3b1SJaegeuk Kim } 325e05df3b1SJaegeuk Kim block -= indirect_blks; 326e05df3b1SJaegeuk Kim if (block < indirect_blks) { 327e05df3b1SJaegeuk Kim offset[n++] = NODE_IND2_BLOCK; 328e05df3b1SJaegeuk Kim noffset[n] = 4 + dptrs_per_blk; 329e05df3b1SJaegeuk Kim offset[n++] = block / direct_blks; 330e05df3b1SJaegeuk Kim noffset[n] = 5 + dptrs_per_blk + offset[n - 1]; 33125c0a6e5SNamjae Jeon offset[n] = block % direct_blks; 332e05df3b1SJaegeuk Kim level = 2; 333e05df3b1SJaegeuk Kim goto got; 334e05df3b1SJaegeuk Kim } 335e05df3b1SJaegeuk Kim block -= indirect_blks; 336e05df3b1SJaegeuk Kim if (block < dindirect_blks) { 337e05df3b1SJaegeuk Kim offset[n++] = NODE_DIND_BLOCK; 338e05df3b1SJaegeuk Kim noffset[n] = 5 + (dptrs_per_blk * 2); 339e05df3b1SJaegeuk Kim offset[n++] = block / indirect_blks; 340e05df3b1SJaegeuk Kim noffset[n] = 6 + (dptrs_per_blk * 2) + 341e05df3b1SJaegeuk Kim offset[n - 1] * (dptrs_per_blk + 1); 342e05df3b1SJaegeuk Kim offset[n++] = (block / direct_blks) % dptrs_per_blk; 343e05df3b1SJaegeuk Kim noffset[n] = 7 + (dptrs_per_blk * 2) + 344e05df3b1SJaegeuk Kim offset[n - 2] * (dptrs_per_blk + 1) + 345e05df3b1SJaegeuk Kim offset[n - 1]; 34625c0a6e5SNamjae Jeon offset[n] = block % direct_blks; 347e05df3b1SJaegeuk Kim level = 3; 348e05df3b1SJaegeuk Kim goto got; 349e05df3b1SJaegeuk Kim } else { 350e05df3b1SJaegeuk Kim BUG(); 351e05df3b1SJaegeuk Kim } 352e05df3b1SJaegeuk Kim got: 353e05df3b1SJaegeuk Kim return level; 354e05df3b1SJaegeuk Kim } 355e05df3b1SJaegeuk Kim 356e05df3b1SJaegeuk Kim /* 357e05df3b1SJaegeuk Kim * Caller should call f2fs_put_dnode(dn). 3584f4124d0SChao Yu * Also, it should grab and release a rwsem by calling f2fs_lock_op() and 3594f4124d0SChao Yu * f2fs_unlock_op() only if ro is not set RDONLY_NODE. 36039936837SJaegeuk Kim * In the case of RDONLY_NODE, we don't need to care about mutex. 361e05df3b1SJaegeuk Kim */ 362266e97a8SJaegeuk Kim int get_dnode_of_data(struct dnode_of_data *dn, pgoff_t index, int mode) 363e05df3b1SJaegeuk Kim { 364e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); 365e05df3b1SJaegeuk Kim struct page *npage[4]; 366e05df3b1SJaegeuk Kim struct page *parent; 367e05df3b1SJaegeuk Kim int offset[4]; 368e05df3b1SJaegeuk Kim unsigned int noffset[4]; 369e05df3b1SJaegeuk Kim nid_t nids[4]; 370e05df3b1SJaegeuk Kim int level, i; 371e05df3b1SJaegeuk Kim int err = 0; 372e05df3b1SJaegeuk Kim 373de93653fSJaegeuk Kim level = get_node_path(F2FS_I(dn->inode), index, offset, noffset); 374e05df3b1SJaegeuk Kim 375e05df3b1SJaegeuk Kim nids[0] = dn->inode->i_ino; 3761646cfacSJaegeuk Kim npage[0] = dn->inode_page; 3771646cfacSJaegeuk Kim 3781646cfacSJaegeuk Kim if (!npage[0]) { 379e05df3b1SJaegeuk Kim npage[0] = get_node_page(sbi, nids[0]); 380e05df3b1SJaegeuk Kim if (IS_ERR(npage[0])) 381e05df3b1SJaegeuk Kim return PTR_ERR(npage[0]); 3821646cfacSJaegeuk Kim } 383e05df3b1SJaegeuk Kim parent = npage[0]; 38452c2db3fSChangman Lee if (level != 0) 385e05df3b1SJaegeuk Kim nids[1] = get_nid(parent, offset[0], true); 386e05df3b1SJaegeuk Kim dn->inode_page = npage[0]; 387e05df3b1SJaegeuk Kim dn->inode_page_locked = true; 388e05df3b1SJaegeuk Kim 389e05df3b1SJaegeuk Kim /* get indirect or direct nodes */ 390e05df3b1SJaegeuk Kim for (i = 1; i <= level; i++) { 391e05df3b1SJaegeuk Kim bool done = false; 392e05df3b1SJaegeuk Kim 393266e97a8SJaegeuk Kim if (!nids[i] && mode == ALLOC_NODE) { 394e05df3b1SJaegeuk Kim /* alloc new node */ 395e05df3b1SJaegeuk Kim if (!alloc_nid(sbi, &(nids[i]))) { 396e05df3b1SJaegeuk Kim err = -ENOSPC; 397e05df3b1SJaegeuk Kim goto release_pages; 398e05df3b1SJaegeuk Kim } 399e05df3b1SJaegeuk Kim 400e05df3b1SJaegeuk Kim dn->nid = nids[i]; 4018ae8f162SJaegeuk Kim npage[i] = new_node_page(dn, noffset[i], NULL); 402e05df3b1SJaegeuk Kim if (IS_ERR(npage[i])) { 403e05df3b1SJaegeuk Kim alloc_nid_failed(sbi, nids[i]); 404e05df3b1SJaegeuk Kim err = PTR_ERR(npage[i]); 405e05df3b1SJaegeuk Kim goto release_pages; 406e05df3b1SJaegeuk Kim } 407e05df3b1SJaegeuk Kim 408e05df3b1SJaegeuk Kim set_nid(parent, offset[i - 1], nids[i], i == 1); 409e05df3b1SJaegeuk Kim alloc_nid_done(sbi, nids[i]); 410e05df3b1SJaegeuk Kim done = true; 411266e97a8SJaegeuk Kim } else if (mode == LOOKUP_NODE_RA && i == level && level > 1) { 412e05df3b1SJaegeuk Kim npage[i] = get_node_page_ra(parent, offset[i - 1]); 413e05df3b1SJaegeuk Kim if (IS_ERR(npage[i])) { 414e05df3b1SJaegeuk Kim err = PTR_ERR(npage[i]); 415e05df3b1SJaegeuk Kim goto release_pages; 416e05df3b1SJaegeuk Kim } 417e05df3b1SJaegeuk Kim done = true; 418e05df3b1SJaegeuk Kim } 419e05df3b1SJaegeuk Kim if (i == 1) { 420e05df3b1SJaegeuk Kim dn->inode_page_locked = false; 421e05df3b1SJaegeuk Kim unlock_page(parent); 422e05df3b1SJaegeuk Kim } else { 423e05df3b1SJaegeuk Kim f2fs_put_page(parent, 1); 424e05df3b1SJaegeuk Kim } 425e05df3b1SJaegeuk Kim 426e05df3b1SJaegeuk Kim if (!done) { 427e05df3b1SJaegeuk Kim npage[i] = get_node_page(sbi, nids[i]); 428e05df3b1SJaegeuk Kim if (IS_ERR(npage[i])) { 429e05df3b1SJaegeuk Kim err = PTR_ERR(npage[i]); 430e05df3b1SJaegeuk Kim f2fs_put_page(npage[0], 0); 431e05df3b1SJaegeuk Kim goto release_out; 432e05df3b1SJaegeuk Kim } 433e05df3b1SJaegeuk Kim } 434e05df3b1SJaegeuk Kim if (i < level) { 435e05df3b1SJaegeuk Kim parent = npage[i]; 436e05df3b1SJaegeuk Kim nids[i + 1] = get_nid(parent, offset[i], false); 437e05df3b1SJaegeuk Kim } 438e05df3b1SJaegeuk Kim } 439e05df3b1SJaegeuk Kim dn->nid = nids[level]; 440e05df3b1SJaegeuk Kim dn->ofs_in_node = offset[level]; 441e05df3b1SJaegeuk Kim dn->node_page = npage[level]; 442e05df3b1SJaegeuk Kim dn->data_blkaddr = datablock_addr(dn->node_page, dn->ofs_in_node); 443e05df3b1SJaegeuk Kim return 0; 444e05df3b1SJaegeuk Kim 445e05df3b1SJaegeuk Kim release_pages: 446e05df3b1SJaegeuk Kim f2fs_put_page(parent, 1); 447e05df3b1SJaegeuk Kim if (i > 1) 448e05df3b1SJaegeuk Kim f2fs_put_page(npage[0], 0); 449e05df3b1SJaegeuk Kim release_out: 450e05df3b1SJaegeuk Kim dn->inode_page = NULL; 451e05df3b1SJaegeuk Kim dn->node_page = NULL; 452e05df3b1SJaegeuk Kim return err; 453e05df3b1SJaegeuk Kim } 454e05df3b1SJaegeuk Kim 455e05df3b1SJaegeuk Kim static void truncate_node(struct dnode_of_data *dn) 456e05df3b1SJaegeuk Kim { 457e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); 458e05df3b1SJaegeuk Kim struct node_info ni; 459e05df3b1SJaegeuk Kim 460e05df3b1SJaegeuk Kim get_node_info(sbi, dn->nid, &ni); 46171e9fec5SJaegeuk Kim if (dn->inode->i_blocks == 0) { 4625d56b671SJaegeuk Kim f2fs_bug_on(ni.blk_addr != NULL_ADDR); 46371e9fec5SJaegeuk Kim goto invalidate; 46471e9fec5SJaegeuk Kim } 4655d56b671SJaegeuk Kim f2fs_bug_on(ni.blk_addr == NULL_ADDR); 466e05df3b1SJaegeuk Kim 467e05df3b1SJaegeuk Kim /* Deallocate node address */ 46871e9fec5SJaegeuk Kim invalidate_blocks(sbi, ni.blk_addr); 469ef86d709SGu Zheng dec_valid_node_count(sbi, dn->inode); 470e05df3b1SJaegeuk Kim set_node_addr(sbi, &ni, NULL_ADDR); 471e05df3b1SJaegeuk Kim 472e05df3b1SJaegeuk Kim if (dn->nid == dn->inode->i_ino) { 473e05df3b1SJaegeuk Kim remove_orphan_inode(sbi, dn->nid); 474e05df3b1SJaegeuk Kim dec_valid_inode_count(sbi); 475e05df3b1SJaegeuk Kim } else { 476e05df3b1SJaegeuk Kim sync_inode_page(dn); 477e05df3b1SJaegeuk Kim } 47871e9fec5SJaegeuk Kim invalidate: 479e05df3b1SJaegeuk Kim clear_node_page_dirty(dn->node_page); 480e05df3b1SJaegeuk Kim F2FS_SET_SB_DIRT(sbi); 481e05df3b1SJaegeuk Kim 482e05df3b1SJaegeuk Kim f2fs_put_page(dn->node_page, 1); 483bf39c00aSJaegeuk Kim 484bf39c00aSJaegeuk Kim invalidate_mapping_pages(NODE_MAPPING(sbi), 485bf39c00aSJaegeuk Kim dn->node_page->index, dn->node_page->index); 486bf39c00aSJaegeuk Kim 487e05df3b1SJaegeuk Kim dn->node_page = NULL; 48851dd6249SNamjae Jeon trace_f2fs_truncate_node(dn->inode, dn->nid, ni.blk_addr); 489e05df3b1SJaegeuk Kim } 490e05df3b1SJaegeuk Kim 491e05df3b1SJaegeuk Kim static int truncate_dnode(struct dnode_of_data *dn) 492e05df3b1SJaegeuk Kim { 493e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); 494e05df3b1SJaegeuk Kim struct page *page; 495e05df3b1SJaegeuk Kim 496e05df3b1SJaegeuk Kim if (dn->nid == 0) 497e05df3b1SJaegeuk Kim return 1; 498e05df3b1SJaegeuk Kim 499e05df3b1SJaegeuk Kim /* get direct node */ 500e05df3b1SJaegeuk Kim page = get_node_page(sbi, dn->nid); 501e05df3b1SJaegeuk Kim if (IS_ERR(page) && PTR_ERR(page) == -ENOENT) 502e05df3b1SJaegeuk Kim return 1; 503e05df3b1SJaegeuk Kim else if (IS_ERR(page)) 504e05df3b1SJaegeuk Kim return PTR_ERR(page); 505e05df3b1SJaegeuk Kim 506e05df3b1SJaegeuk Kim /* Make dnode_of_data for parameter */ 507e05df3b1SJaegeuk Kim dn->node_page = page; 508e05df3b1SJaegeuk Kim dn->ofs_in_node = 0; 509e05df3b1SJaegeuk Kim truncate_data_blocks(dn); 510e05df3b1SJaegeuk Kim truncate_node(dn); 511e05df3b1SJaegeuk Kim return 1; 512e05df3b1SJaegeuk Kim } 513e05df3b1SJaegeuk Kim 514e05df3b1SJaegeuk Kim static int truncate_nodes(struct dnode_of_data *dn, unsigned int nofs, 515e05df3b1SJaegeuk Kim int ofs, int depth) 516e05df3b1SJaegeuk Kim { 517e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); 518e05df3b1SJaegeuk Kim struct dnode_of_data rdn = *dn; 519e05df3b1SJaegeuk Kim struct page *page; 520e05df3b1SJaegeuk Kim struct f2fs_node *rn; 521e05df3b1SJaegeuk Kim nid_t child_nid; 522e05df3b1SJaegeuk Kim unsigned int child_nofs; 523e05df3b1SJaegeuk Kim int freed = 0; 524e05df3b1SJaegeuk Kim int i, ret; 525e05df3b1SJaegeuk Kim 526e05df3b1SJaegeuk Kim if (dn->nid == 0) 527e05df3b1SJaegeuk Kim return NIDS_PER_BLOCK + 1; 528e05df3b1SJaegeuk Kim 52951dd6249SNamjae Jeon trace_f2fs_truncate_nodes_enter(dn->inode, dn->nid, dn->data_blkaddr); 53051dd6249SNamjae Jeon 531e05df3b1SJaegeuk Kim page = get_node_page(sbi, dn->nid); 53251dd6249SNamjae Jeon if (IS_ERR(page)) { 53351dd6249SNamjae Jeon trace_f2fs_truncate_nodes_exit(dn->inode, PTR_ERR(page)); 534e05df3b1SJaegeuk Kim return PTR_ERR(page); 53551dd6249SNamjae Jeon } 536e05df3b1SJaegeuk Kim 53745590710SGu Zheng rn = F2FS_NODE(page); 538e05df3b1SJaegeuk Kim if (depth < 3) { 539e05df3b1SJaegeuk Kim for (i = ofs; i < NIDS_PER_BLOCK; i++, freed++) { 540e05df3b1SJaegeuk Kim child_nid = le32_to_cpu(rn->in.nid[i]); 541e05df3b1SJaegeuk Kim if (child_nid == 0) 542e05df3b1SJaegeuk Kim continue; 543e05df3b1SJaegeuk Kim rdn.nid = child_nid; 544e05df3b1SJaegeuk Kim ret = truncate_dnode(&rdn); 545e05df3b1SJaegeuk Kim if (ret < 0) 546e05df3b1SJaegeuk Kim goto out_err; 547e05df3b1SJaegeuk Kim set_nid(page, i, 0, false); 548e05df3b1SJaegeuk Kim } 549e05df3b1SJaegeuk Kim } else { 550e05df3b1SJaegeuk Kim child_nofs = nofs + ofs * (NIDS_PER_BLOCK + 1) + 1; 551e05df3b1SJaegeuk Kim for (i = ofs; i < NIDS_PER_BLOCK; i++) { 552e05df3b1SJaegeuk Kim child_nid = le32_to_cpu(rn->in.nid[i]); 553e05df3b1SJaegeuk Kim if (child_nid == 0) { 554e05df3b1SJaegeuk Kim child_nofs += NIDS_PER_BLOCK + 1; 555e05df3b1SJaegeuk Kim continue; 556e05df3b1SJaegeuk Kim } 557e05df3b1SJaegeuk Kim rdn.nid = child_nid; 558e05df3b1SJaegeuk Kim ret = truncate_nodes(&rdn, child_nofs, 0, depth - 1); 559e05df3b1SJaegeuk Kim if (ret == (NIDS_PER_BLOCK + 1)) { 560e05df3b1SJaegeuk Kim set_nid(page, i, 0, false); 561e05df3b1SJaegeuk Kim child_nofs += ret; 562e05df3b1SJaegeuk Kim } else if (ret < 0 && ret != -ENOENT) { 563e05df3b1SJaegeuk Kim goto out_err; 564e05df3b1SJaegeuk Kim } 565e05df3b1SJaegeuk Kim } 566e05df3b1SJaegeuk Kim freed = child_nofs; 567e05df3b1SJaegeuk Kim } 568e05df3b1SJaegeuk Kim 569e05df3b1SJaegeuk Kim if (!ofs) { 570e05df3b1SJaegeuk Kim /* remove current indirect node */ 571e05df3b1SJaegeuk Kim dn->node_page = page; 572e05df3b1SJaegeuk Kim truncate_node(dn); 573e05df3b1SJaegeuk Kim freed++; 574e05df3b1SJaegeuk Kim } else { 575e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 576e05df3b1SJaegeuk Kim } 57751dd6249SNamjae Jeon trace_f2fs_truncate_nodes_exit(dn->inode, freed); 578e05df3b1SJaegeuk Kim return freed; 579e05df3b1SJaegeuk Kim 580e05df3b1SJaegeuk Kim out_err: 581e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 58251dd6249SNamjae Jeon trace_f2fs_truncate_nodes_exit(dn->inode, ret); 583e05df3b1SJaegeuk Kim return ret; 584e05df3b1SJaegeuk Kim } 585e05df3b1SJaegeuk Kim 586e05df3b1SJaegeuk Kim static int truncate_partial_nodes(struct dnode_of_data *dn, 587e05df3b1SJaegeuk Kim struct f2fs_inode *ri, int *offset, int depth) 588e05df3b1SJaegeuk Kim { 589e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); 590e05df3b1SJaegeuk Kim struct page *pages[2]; 591e05df3b1SJaegeuk Kim nid_t nid[3]; 592e05df3b1SJaegeuk Kim nid_t child_nid; 593e05df3b1SJaegeuk Kim int err = 0; 594e05df3b1SJaegeuk Kim int i; 595e05df3b1SJaegeuk Kim int idx = depth - 2; 596e05df3b1SJaegeuk Kim 597e05df3b1SJaegeuk Kim nid[0] = le32_to_cpu(ri->i_nid[offset[0] - NODE_DIR1_BLOCK]); 598e05df3b1SJaegeuk Kim if (!nid[0]) 599e05df3b1SJaegeuk Kim return 0; 600e05df3b1SJaegeuk Kim 601e05df3b1SJaegeuk Kim /* get indirect nodes in the path */ 602a225dca3Sshifei10.ge for (i = 0; i < idx + 1; i++) { 603e05df3b1SJaegeuk Kim /* refernece count'll be increased */ 604e05df3b1SJaegeuk Kim pages[i] = get_node_page(sbi, nid[i]); 605e05df3b1SJaegeuk Kim if (IS_ERR(pages[i])) { 606e05df3b1SJaegeuk Kim err = PTR_ERR(pages[i]); 607a225dca3Sshifei10.ge idx = i - 1; 608e05df3b1SJaegeuk Kim goto fail; 609e05df3b1SJaegeuk Kim } 610e05df3b1SJaegeuk Kim nid[i + 1] = get_nid(pages[i], offset[i + 1], false); 611e05df3b1SJaegeuk Kim } 612e05df3b1SJaegeuk Kim 613e05df3b1SJaegeuk Kim /* free direct nodes linked to a partial indirect node */ 614a225dca3Sshifei10.ge for (i = offset[idx + 1]; i < NIDS_PER_BLOCK; i++) { 615e05df3b1SJaegeuk Kim child_nid = get_nid(pages[idx], i, false); 616e05df3b1SJaegeuk Kim if (!child_nid) 617e05df3b1SJaegeuk Kim continue; 618e05df3b1SJaegeuk Kim dn->nid = child_nid; 619e05df3b1SJaegeuk Kim err = truncate_dnode(dn); 620e05df3b1SJaegeuk Kim if (err < 0) 621e05df3b1SJaegeuk Kim goto fail; 622e05df3b1SJaegeuk Kim set_nid(pages[idx], i, 0, false); 623e05df3b1SJaegeuk Kim } 624e05df3b1SJaegeuk Kim 625a225dca3Sshifei10.ge if (offset[idx + 1] == 0) { 626e05df3b1SJaegeuk Kim dn->node_page = pages[idx]; 627e05df3b1SJaegeuk Kim dn->nid = nid[idx]; 628e05df3b1SJaegeuk Kim truncate_node(dn); 629e05df3b1SJaegeuk Kim } else { 630e05df3b1SJaegeuk Kim f2fs_put_page(pages[idx], 1); 631e05df3b1SJaegeuk Kim } 632e05df3b1SJaegeuk Kim offset[idx]++; 633a225dca3Sshifei10.ge offset[idx + 1] = 0; 634a225dca3Sshifei10.ge idx--; 635e05df3b1SJaegeuk Kim fail: 636a225dca3Sshifei10.ge for (i = idx; i >= 0; i--) 637e05df3b1SJaegeuk Kim f2fs_put_page(pages[i], 1); 63851dd6249SNamjae Jeon 63951dd6249SNamjae Jeon trace_f2fs_truncate_partial_nodes(dn->inode, nid, depth, err); 64051dd6249SNamjae Jeon 641e05df3b1SJaegeuk Kim return err; 642e05df3b1SJaegeuk Kim } 643e05df3b1SJaegeuk Kim 6440a8165d7SJaegeuk Kim /* 645e05df3b1SJaegeuk Kim * All the block addresses of data and nodes should be nullified. 646e05df3b1SJaegeuk Kim */ 647e05df3b1SJaegeuk Kim int truncate_inode_blocks(struct inode *inode, pgoff_t from) 648e05df3b1SJaegeuk Kim { 649e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); 650e05df3b1SJaegeuk Kim int err = 0, cont = 1; 651e05df3b1SJaegeuk Kim int level, offset[4], noffset[4]; 6527dd690c8SJaegeuk Kim unsigned int nofs = 0; 65358bfaf44SJaegeuk Kim struct f2fs_inode *ri; 654e05df3b1SJaegeuk Kim struct dnode_of_data dn; 655e05df3b1SJaegeuk Kim struct page *page; 656e05df3b1SJaegeuk Kim 65751dd6249SNamjae Jeon trace_f2fs_truncate_inode_blocks_enter(inode, from); 65851dd6249SNamjae Jeon 659de93653fSJaegeuk Kim level = get_node_path(F2FS_I(inode), from, offset, noffset); 660afcb7ca0SJaegeuk Kim restart: 661e05df3b1SJaegeuk Kim page = get_node_page(sbi, inode->i_ino); 66251dd6249SNamjae Jeon if (IS_ERR(page)) { 66351dd6249SNamjae Jeon trace_f2fs_truncate_inode_blocks_exit(inode, PTR_ERR(page)); 664e05df3b1SJaegeuk Kim return PTR_ERR(page); 66551dd6249SNamjae Jeon } 666e05df3b1SJaegeuk Kim 667e05df3b1SJaegeuk Kim set_new_dnode(&dn, inode, page, NULL, 0); 668e05df3b1SJaegeuk Kim unlock_page(page); 669e05df3b1SJaegeuk Kim 67058bfaf44SJaegeuk Kim ri = F2FS_INODE(page); 671e05df3b1SJaegeuk Kim switch (level) { 672e05df3b1SJaegeuk Kim case 0: 673e05df3b1SJaegeuk Kim case 1: 674e05df3b1SJaegeuk Kim nofs = noffset[1]; 675e05df3b1SJaegeuk Kim break; 676e05df3b1SJaegeuk Kim case 2: 677e05df3b1SJaegeuk Kim nofs = noffset[1]; 678e05df3b1SJaegeuk Kim if (!offset[level - 1]) 679e05df3b1SJaegeuk Kim goto skip_partial; 68058bfaf44SJaegeuk Kim err = truncate_partial_nodes(&dn, ri, offset, level); 681e05df3b1SJaegeuk Kim if (err < 0 && err != -ENOENT) 682e05df3b1SJaegeuk Kim goto fail; 683e05df3b1SJaegeuk Kim nofs += 1 + NIDS_PER_BLOCK; 684e05df3b1SJaegeuk Kim break; 685e05df3b1SJaegeuk Kim case 3: 686e05df3b1SJaegeuk Kim nofs = 5 + 2 * NIDS_PER_BLOCK; 687e05df3b1SJaegeuk Kim if (!offset[level - 1]) 688e05df3b1SJaegeuk Kim goto skip_partial; 68958bfaf44SJaegeuk Kim err = truncate_partial_nodes(&dn, ri, offset, level); 690e05df3b1SJaegeuk Kim if (err < 0 && err != -ENOENT) 691e05df3b1SJaegeuk Kim goto fail; 692e05df3b1SJaegeuk Kim break; 693e05df3b1SJaegeuk Kim default: 694e05df3b1SJaegeuk Kim BUG(); 695e05df3b1SJaegeuk Kim } 696e05df3b1SJaegeuk Kim 697e05df3b1SJaegeuk Kim skip_partial: 698e05df3b1SJaegeuk Kim while (cont) { 69958bfaf44SJaegeuk Kim dn.nid = le32_to_cpu(ri->i_nid[offset[0] - NODE_DIR1_BLOCK]); 700e05df3b1SJaegeuk Kim switch (offset[0]) { 701e05df3b1SJaegeuk Kim case NODE_DIR1_BLOCK: 702e05df3b1SJaegeuk Kim case NODE_DIR2_BLOCK: 703e05df3b1SJaegeuk Kim err = truncate_dnode(&dn); 704e05df3b1SJaegeuk Kim break; 705e05df3b1SJaegeuk Kim 706e05df3b1SJaegeuk Kim case NODE_IND1_BLOCK: 707e05df3b1SJaegeuk Kim case NODE_IND2_BLOCK: 708e05df3b1SJaegeuk Kim err = truncate_nodes(&dn, nofs, offset[1], 2); 709e05df3b1SJaegeuk Kim break; 710e05df3b1SJaegeuk Kim 711e05df3b1SJaegeuk Kim case NODE_DIND_BLOCK: 712e05df3b1SJaegeuk Kim err = truncate_nodes(&dn, nofs, offset[1], 3); 713e05df3b1SJaegeuk Kim cont = 0; 714e05df3b1SJaegeuk Kim break; 715e05df3b1SJaegeuk Kim 716e05df3b1SJaegeuk Kim default: 717e05df3b1SJaegeuk Kim BUG(); 718e05df3b1SJaegeuk Kim } 719e05df3b1SJaegeuk Kim if (err < 0 && err != -ENOENT) 720e05df3b1SJaegeuk Kim goto fail; 721e05df3b1SJaegeuk Kim if (offset[1] == 0 && 72258bfaf44SJaegeuk Kim ri->i_nid[offset[0] - NODE_DIR1_BLOCK]) { 723e05df3b1SJaegeuk Kim lock_page(page); 7244ef51a8fSJaegeuk Kim if (unlikely(page->mapping != NODE_MAPPING(sbi))) { 725afcb7ca0SJaegeuk Kim f2fs_put_page(page, 1); 726afcb7ca0SJaegeuk Kim goto restart; 727afcb7ca0SJaegeuk Kim } 728e05df3b1SJaegeuk Kim wait_on_page_writeback(page); 72958bfaf44SJaegeuk Kim ri->i_nid[offset[0] - NODE_DIR1_BLOCK] = 0; 730e05df3b1SJaegeuk Kim set_page_dirty(page); 731e05df3b1SJaegeuk Kim unlock_page(page); 732e05df3b1SJaegeuk Kim } 733e05df3b1SJaegeuk Kim offset[1] = 0; 734e05df3b1SJaegeuk Kim offset[0]++; 735e05df3b1SJaegeuk Kim nofs += err; 736e05df3b1SJaegeuk Kim } 737e05df3b1SJaegeuk Kim fail: 738e05df3b1SJaegeuk Kim f2fs_put_page(page, 0); 73951dd6249SNamjae Jeon trace_f2fs_truncate_inode_blocks_exit(inode, err); 740e05df3b1SJaegeuk Kim return err > 0 ? 0 : err; 741e05df3b1SJaegeuk Kim } 742e05df3b1SJaegeuk Kim 7434f16fb0fSJaegeuk Kim int truncate_xattr_node(struct inode *inode, struct page *page) 7444f16fb0fSJaegeuk Kim { 7454f16fb0fSJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); 7464f16fb0fSJaegeuk Kim nid_t nid = F2FS_I(inode)->i_xattr_nid; 7474f16fb0fSJaegeuk Kim struct dnode_of_data dn; 7484f16fb0fSJaegeuk Kim struct page *npage; 7494f16fb0fSJaegeuk Kim 7504f16fb0fSJaegeuk Kim if (!nid) 7514f16fb0fSJaegeuk Kim return 0; 7524f16fb0fSJaegeuk Kim 7534f16fb0fSJaegeuk Kim npage = get_node_page(sbi, nid); 7544f16fb0fSJaegeuk Kim if (IS_ERR(npage)) 7554f16fb0fSJaegeuk Kim return PTR_ERR(npage); 7564f16fb0fSJaegeuk Kim 7574f16fb0fSJaegeuk Kim F2FS_I(inode)->i_xattr_nid = 0; 75865985d93SJaegeuk Kim 75965985d93SJaegeuk Kim /* need to do checkpoint during fsync */ 76065985d93SJaegeuk Kim F2FS_I(inode)->xattr_ver = cur_cp_version(F2FS_CKPT(sbi)); 76165985d93SJaegeuk Kim 7624f16fb0fSJaegeuk Kim set_new_dnode(&dn, inode, page, npage, nid); 7634f16fb0fSJaegeuk Kim 7644f16fb0fSJaegeuk Kim if (page) 76501d2d1aaSChao Yu dn.inode_page_locked = true; 7664f16fb0fSJaegeuk Kim truncate_node(&dn); 7674f16fb0fSJaegeuk Kim return 0; 7684f16fb0fSJaegeuk Kim } 7694f16fb0fSJaegeuk Kim 77039936837SJaegeuk Kim /* 7714f4124d0SChao Yu * Caller should grab and release a rwsem by calling f2fs_lock_op() and 7724f4124d0SChao Yu * f2fs_unlock_op(). 77339936837SJaegeuk Kim */ 77458e674d6SGu Zheng void remove_inode_page(struct inode *inode) 775e05df3b1SJaegeuk Kim { 776e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); 777e05df3b1SJaegeuk Kim struct page *page; 778e05df3b1SJaegeuk Kim nid_t ino = inode->i_ino; 779e05df3b1SJaegeuk Kim struct dnode_of_data dn; 780e05df3b1SJaegeuk Kim 781e05df3b1SJaegeuk Kim page = get_node_page(sbi, ino); 78239936837SJaegeuk Kim if (IS_ERR(page)) 78358e674d6SGu Zheng return; 784e05df3b1SJaegeuk Kim 78558e674d6SGu Zheng if (truncate_xattr_node(inode, page)) { 7864f16fb0fSJaegeuk Kim f2fs_put_page(page, 1); 78758e674d6SGu Zheng return; 788e05df3b1SJaegeuk Kim } 78971e9fec5SJaegeuk Kim /* 0 is possible, after f2fs_new_inode() is failed */ 7905d56b671SJaegeuk Kim f2fs_bug_on(inode->i_blocks != 0 && inode->i_blocks != 1); 791e05df3b1SJaegeuk Kim set_new_dnode(&dn, inode, page, page, ino); 792e05df3b1SJaegeuk Kim truncate_node(&dn); 793e05df3b1SJaegeuk Kim } 794e05df3b1SJaegeuk Kim 79544a83ff6SJaegeuk Kim struct page *new_inode_page(struct inode *inode, const struct qstr *name) 796e05df3b1SJaegeuk Kim { 797e05df3b1SJaegeuk Kim struct dnode_of_data dn; 798e05df3b1SJaegeuk Kim 799e05df3b1SJaegeuk Kim /* allocate inode page for new inode */ 800e05df3b1SJaegeuk Kim set_new_dnode(&dn, inode, NULL, NULL, inode->i_ino); 80144a83ff6SJaegeuk Kim 80244a83ff6SJaegeuk Kim /* caller should f2fs_put_page(page, 1); */ 8038ae8f162SJaegeuk Kim return new_node_page(&dn, 0, NULL); 804e05df3b1SJaegeuk Kim } 805e05df3b1SJaegeuk Kim 8068ae8f162SJaegeuk Kim struct page *new_node_page(struct dnode_of_data *dn, 8078ae8f162SJaegeuk Kim unsigned int ofs, struct page *ipage) 808e05df3b1SJaegeuk Kim { 809e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); 810e05df3b1SJaegeuk Kim struct node_info old_ni, new_ni; 811e05df3b1SJaegeuk Kim struct page *page; 812e05df3b1SJaegeuk Kim int err; 813e05df3b1SJaegeuk Kim 8146bacf52fSJaegeuk Kim if (unlikely(is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC))) 815e05df3b1SJaegeuk Kim return ERR_PTR(-EPERM); 816e05df3b1SJaegeuk Kim 8174ef51a8fSJaegeuk Kim page = grab_cache_page(NODE_MAPPING(sbi), dn->nid); 818e05df3b1SJaegeuk Kim if (!page) 819e05df3b1SJaegeuk Kim return ERR_PTR(-ENOMEM); 820e05df3b1SJaegeuk Kim 8216bacf52fSJaegeuk Kim if (unlikely(!inc_valid_node_count(sbi, dn->inode))) { 8229c02740cSJaegeuk Kim err = -ENOSPC; 8239c02740cSJaegeuk Kim goto fail; 8249c02740cSJaegeuk Kim } 825e05df3b1SJaegeuk Kim 8269c02740cSJaegeuk Kim get_node_info(sbi, dn->nid, &old_ni); 827e05df3b1SJaegeuk Kim 828e05df3b1SJaegeuk Kim /* Reinitialize old_ni with new node page */ 8295d56b671SJaegeuk Kim f2fs_bug_on(old_ni.blk_addr != NULL_ADDR); 830e05df3b1SJaegeuk Kim new_ni = old_ni; 831e05df3b1SJaegeuk Kim new_ni.ino = dn->inode->i_ino; 832e05df3b1SJaegeuk Kim set_node_addr(sbi, &new_ni, NEW_ADDR); 8339c02740cSJaegeuk Kim 8349c02740cSJaegeuk Kim fill_node_footer(page, dn->nid, dn->inode->i_ino, ofs, true); 835398b1ac5SJaegeuk Kim set_cold_node(dn->inode, page); 8369c02740cSJaegeuk Kim SetPageUptodate(page); 8379c02740cSJaegeuk Kim set_page_dirty(page); 838e05df3b1SJaegeuk Kim 8394bc8e9bcSChao Yu if (f2fs_has_xattr_block(ofs)) 840479bd73aSJaegeuk Kim F2FS_I(dn->inode)->i_xattr_nid = dn->nid; 841479bd73aSJaegeuk Kim 842e05df3b1SJaegeuk Kim dn->node_page = page; 8438ae8f162SJaegeuk Kim if (ipage) 8448ae8f162SJaegeuk Kim update_inode(dn->inode, ipage); 8458ae8f162SJaegeuk Kim else 846e05df3b1SJaegeuk Kim sync_inode_page(dn); 847e05df3b1SJaegeuk Kim if (ofs == 0) 848e05df3b1SJaegeuk Kim inc_valid_inode_count(sbi); 849e05df3b1SJaegeuk Kim 850e05df3b1SJaegeuk Kim return page; 851e05df3b1SJaegeuk Kim 852e05df3b1SJaegeuk Kim fail: 85371e9fec5SJaegeuk Kim clear_node_page_dirty(page); 854e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 855e05df3b1SJaegeuk Kim return ERR_PTR(err); 856e05df3b1SJaegeuk Kim } 857e05df3b1SJaegeuk Kim 85856ae674cSJaegeuk Kim /* 85956ae674cSJaegeuk Kim * Caller should do after getting the following values. 86056ae674cSJaegeuk Kim * 0: f2fs_put_page(page, 0) 86156ae674cSJaegeuk Kim * LOCKED_PAGE: f2fs_put_page(page, 1) 86256ae674cSJaegeuk Kim * error: nothing 86356ae674cSJaegeuk Kim */ 86493dfe2acSJaegeuk Kim static int read_node_page(struct page *page, int rw) 865e05df3b1SJaegeuk Kim { 866e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(page->mapping->host->i_sb); 867e05df3b1SJaegeuk Kim struct node_info ni; 868e05df3b1SJaegeuk Kim 869e05df3b1SJaegeuk Kim get_node_info(sbi, page->index, &ni); 870e05df3b1SJaegeuk Kim 8716bacf52fSJaegeuk Kim if (unlikely(ni.blk_addr == NULL_ADDR)) { 872393ff91fSJaegeuk Kim f2fs_put_page(page, 1); 873e05df3b1SJaegeuk Kim return -ENOENT; 874393ff91fSJaegeuk Kim } 875393ff91fSJaegeuk Kim 87656ae674cSJaegeuk Kim if (PageUptodate(page)) 87756ae674cSJaegeuk Kim return LOCKED_PAGE; 878393ff91fSJaegeuk Kim 87993dfe2acSJaegeuk Kim return f2fs_submit_page_bio(sbi, page, ni.blk_addr, rw); 880e05df3b1SJaegeuk Kim } 881e05df3b1SJaegeuk Kim 8820a8165d7SJaegeuk Kim /* 883e05df3b1SJaegeuk Kim * Readahead a node page 884e05df3b1SJaegeuk Kim */ 885e05df3b1SJaegeuk Kim void ra_node_page(struct f2fs_sb_info *sbi, nid_t nid) 886e05df3b1SJaegeuk Kim { 887e05df3b1SJaegeuk Kim struct page *apage; 88856ae674cSJaegeuk Kim int err; 889e05df3b1SJaegeuk Kim 8904ef51a8fSJaegeuk Kim apage = find_get_page(NODE_MAPPING(sbi), nid); 891393ff91fSJaegeuk Kim if (apage && PageUptodate(apage)) { 892393ff91fSJaegeuk Kim f2fs_put_page(apage, 0); 893393ff91fSJaegeuk Kim return; 894393ff91fSJaegeuk Kim } 895e05df3b1SJaegeuk Kim f2fs_put_page(apage, 0); 896e05df3b1SJaegeuk Kim 8974ef51a8fSJaegeuk Kim apage = grab_cache_page(NODE_MAPPING(sbi), nid); 898e05df3b1SJaegeuk Kim if (!apage) 899e05df3b1SJaegeuk Kim return; 900e05df3b1SJaegeuk Kim 90156ae674cSJaegeuk Kim err = read_node_page(apage, READA); 90256ae674cSJaegeuk Kim if (err == 0) 903369a708cSJaegeuk Kim f2fs_put_page(apage, 0); 90456ae674cSJaegeuk Kim else if (err == LOCKED_PAGE) 90556ae674cSJaegeuk Kim f2fs_put_page(apage, 1); 906e05df3b1SJaegeuk Kim } 907e05df3b1SJaegeuk Kim 908e05df3b1SJaegeuk Kim struct page *get_node_page(struct f2fs_sb_info *sbi, pgoff_t nid) 909e05df3b1SJaegeuk Kim { 91056ae674cSJaegeuk Kim struct page *page; 91156ae674cSJaegeuk Kim int err; 912afcb7ca0SJaegeuk Kim repeat: 9134ef51a8fSJaegeuk Kim page = grab_cache_page(NODE_MAPPING(sbi), nid); 914e05df3b1SJaegeuk Kim if (!page) 915e05df3b1SJaegeuk Kim return ERR_PTR(-ENOMEM); 916e05df3b1SJaegeuk Kim 917e05df3b1SJaegeuk Kim err = read_node_page(page, READ_SYNC); 91856ae674cSJaegeuk Kim if (err < 0) 919e05df3b1SJaegeuk Kim return ERR_PTR(err); 92056ae674cSJaegeuk Kim else if (err == LOCKED_PAGE) 92156ae674cSJaegeuk Kim goto got_it; 922e05df3b1SJaegeuk Kim 923393ff91fSJaegeuk Kim lock_page(page); 9246bacf52fSJaegeuk Kim if (unlikely(!PageUptodate(page))) { 925393ff91fSJaegeuk Kim f2fs_put_page(page, 1); 926393ff91fSJaegeuk Kim return ERR_PTR(-EIO); 927393ff91fSJaegeuk Kim } 9284ef51a8fSJaegeuk Kim if (unlikely(page->mapping != NODE_MAPPING(sbi))) { 929afcb7ca0SJaegeuk Kim f2fs_put_page(page, 1); 930afcb7ca0SJaegeuk Kim goto repeat; 931afcb7ca0SJaegeuk Kim } 93256ae674cSJaegeuk Kim got_it: 9335d56b671SJaegeuk Kim f2fs_bug_on(nid != nid_of_node(page)); 934e05df3b1SJaegeuk Kim mark_page_accessed(page); 935e05df3b1SJaegeuk Kim return page; 936e05df3b1SJaegeuk Kim } 937e05df3b1SJaegeuk Kim 9380a8165d7SJaegeuk Kim /* 939e05df3b1SJaegeuk Kim * Return a locked page for the desired node page. 940e05df3b1SJaegeuk Kim * And, readahead MAX_RA_NODE number of node pages. 941e05df3b1SJaegeuk Kim */ 942e05df3b1SJaegeuk Kim struct page *get_node_page_ra(struct page *parent, int start) 943e05df3b1SJaegeuk Kim { 944e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(parent->mapping->host->i_sb); 945c718379bSJaegeuk Kim struct blk_plug plug; 946e05df3b1SJaegeuk Kim struct page *page; 94756ae674cSJaegeuk Kim int err, i, end; 94856ae674cSJaegeuk Kim nid_t nid; 949e05df3b1SJaegeuk Kim 950e05df3b1SJaegeuk Kim /* First, try getting the desired direct node. */ 951e05df3b1SJaegeuk Kim nid = get_nid(parent, start, false); 952e05df3b1SJaegeuk Kim if (!nid) 953e05df3b1SJaegeuk Kim return ERR_PTR(-ENOENT); 954afcb7ca0SJaegeuk Kim repeat: 9554ef51a8fSJaegeuk Kim page = grab_cache_page(NODE_MAPPING(sbi), nid); 956e05df3b1SJaegeuk Kim if (!page) 957e05df3b1SJaegeuk Kim return ERR_PTR(-ENOMEM); 958e05df3b1SJaegeuk Kim 95966d36a29SJaegeuk Kim err = read_node_page(page, READ_SYNC); 96056ae674cSJaegeuk Kim if (err < 0) 961e05df3b1SJaegeuk Kim return ERR_PTR(err); 96256ae674cSJaegeuk Kim else if (err == LOCKED_PAGE) 96356ae674cSJaegeuk Kim goto page_hit; 964e05df3b1SJaegeuk Kim 965c718379bSJaegeuk Kim blk_start_plug(&plug); 966c718379bSJaegeuk Kim 967e05df3b1SJaegeuk Kim /* Then, try readahead for siblings of the desired node */ 968e05df3b1SJaegeuk Kim end = start + MAX_RA_NODE; 969e05df3b1SJaegeuk Kim end = min(end, NIDS_PER_BLOCK); 970e05df3b1SJaegeuk Kim for (i = start + 1; i < end; i++) { 971e05df3b1SJaegeuk Kim nid = get_nid(parent, i, false); 972e05df3b1SJaegeuk Kim if (!nid) 973e05df3b1SJaegeuk Kim continue; 974e05df3b1SJaegeuk Kim ra_node_page(sbi, nid); 975e05df3b1SJaegeuk Kim } 976e05df3b1SJaegeuk Kim 977c718379bSJaegeuk Kim blk_finish_plug(&plug); 978c718379bSJaegeuk Kim 979e05df3b1SJaegeuk Kim lock_page(page); 9804ef51a8fSJaegeuk Kim if (unlikely(page->mapping != NODE_MAPPING(sbi))) { 981afcb7ca0SJaegeuk Kim f2fs_put_page(page, 1); 982afcb7ca0SJaegeuk Kim goto repeat; 983afcb7ca0SJaegeuk Kim } 984e0f56cb4SNamjae Jeon page_hit: 9856bacf52fSJaegeuk Kim if (unlikely(!PageUptodate(page))) { 986e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 987e05df3b1SJaegeuk Kim return ERR_PTR(-EIO); 988e05df3b1SJaegeuk Kim } 989393ff91fSJaegeuk Kim mark_page_accessed(page); 990e05df3b1SJaegeuk Kim return page; 991e05df3b1SJaegeuk Kim } 992e05df3b1SJaegeuk Kim 993e05df3b1SJaegeuk Kim void sync_inode_page(struct dnode_of_data *dn) 994e05df3b1SJaegeuk Kim { 995e05df3b1SJaegeuk Kim if (IS_INODE(dn->node_page) || dn->inode_page == dn->node_page) { 996e05df3b1SJaegeuk Kim update_inode(dn->inode, dn->node_page); 997e05df3b1SJaegeuk Kim } else if (dn->inode_page) { 998e05df3b1SJaegeuk Kim if (!dn->inode_page_locked) 999e05df3b1SJaegeuk Kim lock_page(dn->inode_page); 1000e05df3b1SJaegeuk Kim update_inode(dn->inode, dn->inode_page); 1001e05df3b1SJaegeuk Kim if (!dn->inode_page_locked) 1002e05df3b1SJaegeuk Kim unlock_page(dn->inode_page); 1003e05df3b1SJaegeuk Kim } else { 100439936837SJaegeuk Kim update_inode_page(dn->inode); 1005e05df3b1SJaegeuk Kim } 1006e05df3b1SJaegeuk Kim } 1007e05df3b1SJaegeuk Kim 1008e05df3b1SJaegeuk Kim int sync_node_pages(struct f2fs_sb_info *sbi, nid_t ino, 1009e05df3b1SJaegeuk Kim struct writeback_control *wbc) 1010e05df3b1SJaegeuk Kim { 1011e05df3b1SJaegeuk Kim pgoff_t index, end; 1012e05df3b1SJaegeuk Kim struct pagevec pvec; 1013e05df3b1SJaegeuk Kim int step = ino ? 2 : 0; 1014e05df3b1SJaegeuk Kim int nwritten = 0, wrote = 0; 1015e05df3b1SJaegeuk Kim 1016e05df3b1SJaegeuk Kim pagevec_init(&pvec, 0); 1017e05df3b1SJaegeuk Kim 1018e05df3b1SJaegeuk Kim next_step: 1019e05df3b1SJaegeuk Kim index = 0; 1020e05df3b1SJaegeuk Kim end = LONG_MAX; 1021e05df3b1SJaegeuk Kim 1022e05df3b1SJaegeuk Kim while (index <= end) { 1023e05df3b1SJaegeuk Kim int i, nr_pages; 10244ef51a8fSJaegeuk Kim nr_pages = pagevec_lookup_tag(&pvec, NODE_MAPPING(sbi), &index, 1025e05df3b1SJaegeuk Kim PAGECACHE_TAG_DIRTY, 1026e05df3b1SJaegeuk Kim min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1); 1027e05df3b1SJaegeuk Kim if (nr_pages == 0) 1028e05df3b1SJaegeuk Kim break; 1029e05df3b1SJaegeuk Kim 1030e05df3b1SJaegeuk Kim for (i = 0; i < nr_pages; i++) { 1031e05df3b1SJaegeuk Kim struct page *page = pvec.pages[i]; 1032e05df3b1SJaegeuk Kim 1033e05df3b1SJaegeuk Kim /* 1034e05df3b1SJaegeuk Kim * flushing sequence with step: 1035e05df3b1SJaegeuk Kim * 0. indirect nodes 1036e05df3b1SJaegeuk Kim * 1. dentry dnodes 1037e05df3b1SJaegeuk Kim * 2. file dnodes 1038e05df3b1SJaegeuk Kim */ 1039e05df3b1SJaegeuk Kim if (step == 0 && IS_DNODE(page)) 1040e05df3b1SJaegeuk Kim continue; 1041e05df3b1SJaegeuk Kim if (step == 1 && (!IS_DNODE(page) || 1042e05df3b1SJaegeuk Kim is_cold_node(page))) 1043e05df3b1SJaegeuk Kim continue; 1044e05df3b1SJaegeuk Kim if (step == 2 && (!IS_DNODE(page) || 1045e05df3b1SJaegeuk Kim !is_cold_node(page))) 1046e05df3b1SJaegeuk Kim continue; 1047e05df3b1SJaegeuk Kim 1048e05df3b1SJaegeuk Kim /* 1049e05df3b1SJaegeuk Kim * If an fsync mode, 1050e05df3b1SJaegeuk Kim * we should not skip writing node pages. 1051e05df3b1SJaegeuk Kim */ 1052e05df3b1SJaegeuk Kim if (ino && ino_of_node(page) == ino) 1053e05df3b1SJaegeuk Kim lock_page(page); 1054e05df3b1SJaegeuk Kim else if (!trylock_page(page)) 1055e05df3b1SJaegeuk Kim continue; 1056e05df3b1SJaegeuk Kim 10574ef51a8fSJaegeuk Kim if (unlikely(page->mapping != NODE_MAPPING(sbi))) { 1058e05df3b1SJaegeuk Kim continue_unlock: 1059e05df3b1SJaegeuk Kim unlock_page(page); 1060e05df3b1SJaegeuk Kim continue; 1061e05df3b1SJaegeuk Kim } 1062e05df3b1SJaegeuk Kim if (ino && ino_of_node(page) != ino) 1063e05df3b1SJaegeuk Kim goto continue_unlock; 1064e05df3b1SJaegeuk Kim 1065e05df3b1SJaegeuk Kim if (!PageDirty(page)) { 1066e05df3b1SJaegeuk Kim /* someone wrote it for us */ 1067e05df3b1SJaegeuk Kim goto continue_unlock; 1068e05df3b1SJaegeuk Kim } 1069e05df3b1SJaegeuk Kim 1070e05df3b1SJaegeuk Kim if (!clear_page_dirty_for_io(page)) 1071e05df3b1SJaegeuk Kim goto continue_unlock; 1072e05df3b1SJaegeuk Kim 1073e05df3b1SJaegeuk Kim /* called by fsync() */ 1074e05df3b1SJaegeuk Kim if (ino && IS_DNODE(page)) { 1075e05df3b1SJaegeuk Kim int mark = !is_checkpointed_node(sbi, ino); 1076e05df3b1SJaegeuk Kim set_fsync_mark(page, 1); 1077e05df3b1SJaegeuk Kim if (IS_INODE(page)) 1078e05df3b1SJaegeuk Kim set_dentry_mark(page, mark); 1079e05df3b1SJaegeuk Kim nwritten++; 1080e05df3b1SJaegeuk Kim } else { 1081e05df3b1SJaegeuk Kim set_fsync_mark(page, 0); 1082e05df3b1SJaegeuk Kim set_dentry_mark(page, 0); 1083e05df3b1SJaegeuk Kim } 10844ef51a8fSJaegeuk Kim NODE_MAPPING(sbi)->a_ops->writepage(page, wbc); 1085e05df3b1SJaegeuk Kim wrote++; 1086e05df3b1SJaegeuk Kim 1087e05df3b1SJaegeuk Kim if (--wbc->nr_to_write == 0) 1088e05df3b1SJaegeuk Kim break; 1089e05df3b1SJaegeuk Kim } 1090e05df3b1SJaegeuk Kim pagevec_release(&pvec); 1091e05df3b1SJaegeuk Kim cond_resched(); 1092e05df3b1SJaegeuk Kim 1093e05df3b1SJaegeuk Kim if (wbc->nr_to_write == 0) { 1094e05df3b1SJaegeuk Kim step = 2; 1095e05df3b1SJaegeuk Kim break; 1096e05df3b1SJaegeuk Kim } 1097e05df3b1SJaegeuk Kim } 1098e05df3b1SJaegeuk Kim 1099e05df3b1SJaegeuk Kim if (step < 2) { 1100e05df3b1SJaegeuk Kim step++; 1101e05df3b1SJaegeuk Kim goto next_step; 1102e05df3b1SJaegeuk Kim } 1103e05df3b1SJaegeuk Kim 1104e05df3b1SJaegeuk Kim if (wrote) 1105458e6197SJaegeuk Kim f2fs_submit_merged_bio(sbi, NODE, WRITE); 1106e05df3b1SJaegeuk Kim return nwritten; 1107e05df3b1SJaegeuk Kim } 1108e05df3b1SJaegeuk Kim 1109cfe58f9dSJaegeuk Kim int wait_on_node_pages_writeback(struct f2fs_sb_info *sbi, nid_t ino) 1110cfe58f9dSJaegeuk Kim { 1111cfe58f9dSJaegeuk Kim pgoff_t index = 0, end = LONG_MAX; 1112cfe58f9dSJaegeuk Kim struct pagevec pvec; 1113cfe58f9dSJaegeuk Kim int ret2 = 0, ret = 0; 1114cfe58f9dSJaegeuk Kim 1115cfe58f9dSJaegeuk Kim pagevec_init(&pvec, 0); 11164ef51a8fSJaegeuk Kim 11174ef51a8fSJaegeuk Kim while (index <= end) { 11184ef51a8fSJaegeuk Kim int i, nr_pages; 11194ef51a8fSJaegeuk Kim nr_pages = pagevec_lookup_tag(&pvec, NODE_MAPPING(sbi), &index, 1120cfe58f9dSJaegeuk Kim PAGECACHE_TAG_WRITEBACK, 11214ef51a8fSJaegeuk Kim min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1); 11224ef51a8fSJaegeuk Kim if (nr_pages == 0) 11234ef51a8fSJaegeuk Kim break; 1124cfe58f9dSJaegeuk Kim 1125cfe58f9dSJaegeuk Kim for (i = 0; i < nr_pages; i++) { 1126cfe58f9dSJaegeuk Kim struct page *page = pvec.pages[i]; 1127cfe58f9dSJaegeuk Kim 1128cfe58f9dSJaegeuk Kim /* until radix tree lookup accepts end_index */ 1129cfb271d4SChao Yu if (unlikely(page->index > end)) 1130cfe58f9dSJaegeuk Kim continue; 1131cfe58f9dSJaegeuk Kim 11324bf08ff6SChao Yu if (ino && ino_of_node(page) == ino) { 1133cfe58f9dSJaegeuk Kim wait_on_page_writeback(page); 1134cfe58f9dSJaegeuk Kim if (TestClearPageError(page)) 1135cfe58f9dSJaegeuk Kim ret = -EIO; 1136cfe58f9dSJaegeuk Kim } 11374bf08ff6SChao Yu } 1138cfe58f9dSJaegeuk Kim pagevec_release(&pvec); 1139cfe58f9dSJaegeuk Kim cond_resched(); 1140cfe58f9dSJaegeuk Kim } 1141cfe58f9dSJaegeuk Kim 11424ef51a8fSJaegeuk Kim if (unlikely(test_and_clear_bit(AS_ENOSPC, &NODE_MAPPING(sbi)->flags))) 1143cfe58f9dSJaegeuk Kim ret2 = -ENOSPC; 11444ef51a8fSJaegeuk Kim if (unlikely(test_and_clear_bit(AS_EIO, &NODE_MAPPING(sbi)->flags))) 1145cfe58f9dSJaegeuk Kim ret2 = -EIO; 1146cfe58f9dSJaegeuk Kim if (!ret) 1147cfe58f9dSJaegeuk Kim ret = ret2; 1148cfe58f9dSJaegeuk Kim return ret; 1149cfe58f9dSJaegeuk Kim } 1150cfe58f9dSJaegeuk Kim 1151e05df3b1SJaegeuk Kim static int f2fs_write_node_page(struct page *page, 1152e05df3b1SJaegeuk Kim struct writeback_control *wbc) 1153e05df3b1SJaegeuk Kim { 1154e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(page->mapping->host->i_sb); 1155e05df3b1SJaegeuk Kim nid_t nid; 1156e05df3b1SJaegeuk Kim block_t new_addr; 1157e05df3b1SJaegeuk Kim struct node_info ni; 1158fb5566daSJaegeuk Kim struct f2fs_io_info fio = { 1159fb5566daSJaegeuk Kim .type = NODE, 1160fb5566daSJaegeuk Kim .rw = (wbc->sync_mode == WB_SYNC_ALL) ? WRITE_SYNC : WRITE, 1161fb5566daSJaegeuk Kim }; 1162e05df3b1SJaegeuk Kim 1163cfb271d4SChao Yu if (unlikely(sbi->por_doing)) 116487a9bd26SJaegeuk Kim goto redirty_out; 116587a9bd26SJaegeuk Kim 1166e05df3b1SJaegeuk Kim wait_on_page_writeback(page); 1167e05df3b1SJaegeuk Kim 1168e05df3b1SJaegeuk Kim /* get old block addr of this node page */ 1169e05df3b1SJaegeuk Kim nid = nid_of_node(page); 11705d56b671SJaegeuk Kim f2fs_bug_on(page->index != nid); 1171e05df3b1SJaegeuk Kim 1172e05df3b1SJaegeuk Kim get_node_info(sbi, nid, &ni); 1173e05df3b1SJaegeuk Kim 1174e05df3b1SJaegeuk Kim /* This page is already truncated */ 11756bacf52fSJaegeuk Kim if (unlikely(ni.blk_addr == NULL_ADDR)) { 117639936837SJaegeuk Kim dec_page_count(sbi, F2FS_DIRTY_NODES); 117739936837SJaegeuk Kim unlock_page(page); 117839936837SJaegeuk Kim return 0; 117939936837SJaegeuk Kim } 1180e05df3b1SJaegeuk Kim 118187a9bd26SJaegeuk Kim if (wbc->for_reclaim) 118287a9bd26SJaegeuk Kim goto redirty_out; 118308d8058bSJaegeuk Kim 118439936837SJaegeuk Kim mutex_lock(&sbi->node_write); 1185e05df3b1SJaegeuk Kim set_page_writeback(page); 1186fb5566daSJaegeuk Kim write_node_page(sbi, page, &fio, nid, ni.blk_addr, &new_addr); 1187e05df3b1SJaegeuk Kim set_node_addr(sbi, &ni, new_addr); 1188e05df3b1SJaegeuk Kim dec_page_count(sbi, F2FS_DIRTY_NODES); 118939936837SJaegeuk Kim mutex_unlock(&sbi->node_write); 1190e05df3b1SJaegeuk Kim unlock_page(page); 1191e05df3b1SJaegeuk Kim return 0; 119287a9bd26SJaegeuk Kim 119387a9bd26SJaegeuk Kim redirty_out: 119487a9bd26SJaegeuk Kim dec_page_count(sbi, F2FS_DIRTY_NODES); 119587a9bd26SJaegeuk Kim wbc->pages_skipped++; 11969cf3c389SChao Yu account_page_redirty(page); 119787a9bd26SJaegeuk Kim set_page_dirty(page); 119887a9bd26SJaegeuk Kim return AOP_WRITEPAGE_ACTIVATE; 1199e05df3b1SJaegeuk Kim } 1200e05df3b1SJaegeuk Kim 1201e05df3b1SJaegeuk Kim static int f2fs_write_node_pages(struct address_space *mapping, 1202e05df3b1SJaegeuk Kim struct writeback_control *wbc) 1203e05df3b1SJaegeuk Kim { 1204e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(mapping->host->i_sb); 120550c8cdb3SJaegeuk Kim long diff; 1206e05df3b1SJaegeuk Kim 12074660f9c0SJaegeuk Kim /* balancing f2fs's metadata in background */ 12084660f9c0SJaegeuk Kim f2fs_balance_fs_bg(sbi); 1209e05df3b1SJaegeuk Kim 1210a7fdffbdSJaegeuk Kim /* collect a number of dirty node pages and write together */ 121187d6f890SJaegeuk Kim if (get_pages(sbi, F2FS_DIRTY_NODES) < nr_pages_to_skip(sbi, NODE)) 1212d3baf95dSJaegeuk Kim goto skip_write; 1213a7fdffbdSJaegeuk Kim 121450c8cdb3SJaegeuk Kim diff = nr_pages_to_write(sbi, NODE, wbc); 1215fb5566daSJaegeuk Kim wbc->sync_mode = WB_SYNC_NONE; 1216e05df3b1SJaegeuk Kim sync_node_pages(sbi, 0, wbc); 121750c8cdb3SJaegeuk Kim wbc->nr_to_write = max((long)0, wbc->nr_to_write - diff); 1218e05df3b1SJaegeuk Kim return 0; 1219d3baf95dSJaegeuk Kim 1220d3baf95dSJaegeuk Kim skip_write: 1221d3baf95dSJaegeuk Kim wbc->pages_skipped += get_pages(sbi, F2FS_DIRTY_NODES); 1222d3baf95dSJaegeuk Kim return 0; 1223e05df3b1SJaegeuk Kim } 1224e05df3b1SJaegeuk Kim 1225e05df3b1SJaegeuk Kim static int f2fs_set_node_page_dirty(struct page *page) 1226e05df3b1SJaegeuk Kim { 1227e05df3b1SJaegeuk Kim struct address_space *mapping = page->mapping; 1228e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(mapping->host->i_sb); 1229e05df3b1SJaegeuk Kim 123026c6b887SJaegeuk Kim trace_f2fs_set_page_dirty(page, NODE); 123126c6b887SJaegeuk Kim 1232e05df3b1SJaegeuk Kim SetPageUptodate(page); 1233e05df3b1SJaegeuk Kim if (!PageDirty(page)) { 1234e05df3b1SJaegeuk Kim __set_page_dirty_nobuffers(page); 1235e05df3b1SJaegeuk Kim inc_page_count(sbi, F2FS_DIRTY_NODES); 1236e05df3b1SJaegeuk Kim SetPagePrivate(page); 1237e05df3b1SJaegeuk Kim return 1; 1238e05df3b1SJaegeuk Kim } 1239e05df3b1SJaegeuk Kim return 0; 1240e05df3b1SJaegeuk Kim } 1241e05df3b1SJaegeuk Kim 1242d47992f8SLukas Czerner static void f2fs_invalidate_node_page(struct page *page, unsigned int offset, 1243d47992f8SLukas Czerner unsigned int length) 1244e05df3b1SJaegeuk Kim { 1245e05df3b1SJaegeuk Kim struct inode *inode = page->mapping->host; 1246e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); 1247e05df3b1SJaegeuk Kim if (PageDirty(page)) 1248e05df3b1SJaegeuk Kim dec_page_count(sbi, F2FS_DIRTY_NODES); 1249e05df3b1SJaegeuk Kim ClearPagePrivate(page); 1250e05df3b1SJaegeuk Kim } 1251e05df3b1SJaegeuk Kim 1252e05df3b1SJaegeuk Kim static int f2fs_release_node_page(struct page *page, gfp_t wait) 1253e05df3b1SJaegeuk Kim { 1254e05df3b1SJaegeuk Kim ClearPagePrivate(page); 1255c3850aa1SJaegeuk Kim return 1; 1256e05df3b1SJaegeuk Kim } 1257e05df3b1SJaegeuk Kim 12580a8165d7SJaegeuk Kim /* 1259e05df3b1SJaegeuk Kim * Structure of the f2fs node operations 1260e05df3b1SJaegeuk Kim */ 1261e05df3b1SJaegeuk Kim const struct address_space_operations f2fs_node_aops = { 1262e05df3b1SJaegeuk Kim .writepage = f2fs_write_node_page, 1263e05df3b1SJaegeuk Kim .writepages = f2fs_write_node_pages, 1264e05df3b1SJaegeuk Kim .set_page_dirty = f2fs_set_node_page_dirty, 1265e05df3b1SJaegeuk Kim .invalidatepage = f2fs_invalidate_node_page, 1266e05df3b1SJaegeuk Kim .releasepage = f2fs_release_node_page, 1267e05df3b1SJaegeuk Kim }; 1268e05df3b1SJaegeuk Kim 12698a7ed66aSJaegeuk Kim static struct free_nid *__lookup_free_nid_list(struct f2fs_nm_info *nm_i, 12708a7ed66aSJaegeuk Kim nid_t n) 1271e05df3b1SJaegeuk Kim { 12728a7ed66aSJaegeuk Kim return radix_tree_lookup(&nm_i->free_nid_root, n); 12733aa770a9SNamjae Jeon } 1274e05df3b1SJaegeuk Kim 12758a7ed66aSJaegeuk Kim static void __del_from_free_nid_list(struct f2fs_nm_info *nm_i, 12768a7ed66aSJaegeuk Kim struct free_nid *i) 1277e05df3b1SJaegeuk Kim { 1278e05df3b1SJaegeuk Kim list_del(&i->list); 12798a7ed66aSJaegeuk Kim radix_tree_delete(&nm_i->free_nid_root, i->nid); 1280e05df3b1SJaegeuk Kim kmem_cache_free(free_nid_slab, i); 1281e05df3b1SJaegeuk Kim } 1282e05df3b1SJaegeuk Kim 128359bbd474SJaegeuk Kim static int add_free_nid(struct f2fs_nm_info *nm_i, nid_t nid, bool build) 1284e05df3b1SJaegeuk Kim { 1285e05df3b1SJaegeuk Kim struct free_nid *i; 128659bbd474SJaegeuk Kim struct nat_entry *ne; 128759bbd474SJaegeuk Kim bool allocated = false; 1288e05df3b1SJaegeuk Kim 1289e05df3b1SJaegeuk Kim if (nm_i->fcnt > 2 * MAX_FREE_NIDS) 129023d38844SHaicheng Li return -1; 12919198acebSJaegeuk Kim 12929198acebSJaegeuk Kim /* 0 nid should not be used */ 1293cfb271d4SChao Yu if (unlikely(nid == 0)) 12949198acebSJaegeuk Kim return 0; 129559bbd474SJaegeuk Kim 12967bd59381SGu Zheng if (build) { 129759bbd474SJaegeuk Kim /* do not add allocated nids */ 129859bbd474SJaegeuk Kim read_lock(&nm_i->nat_tree_lock); 129959bbd474SJaegeuk Kim ne = __lookup_nat_cache(nm_i, nid); 13008a7ed66aSJaegeuk Kim if (ne && 13018a7ed66aSJaegeuk Kim (!ne->checkpointed || nat_get_blkaddr(ne) != NULL_ADDR)) 130259bbd474SJaegeuk Kim allocated = true; 130359bbd474SJaegeuk Kim read_unlock(&nm_i->nat_tree_lock); 130459bbd474SJaegeuk Kim if (allocated) 130559bbd474SJaegeuk Kim return 0; 1306e05df3b1SJaegeuk Kim } 13077bd59381SGu Zheng 13087bd59381SGu Zheng i = f2fs_kmem_cache_alloc(free_nid_slab, GFP_NOFS); 1309e05df3b1SJaegeuk Kim i->nid = nid; 1310e05df3b1SJaegeuk Kim i->state = NID_NEW; 1311e05df3b1SJaegeuk Kim 1312e05df3b1SJaegeuk Kim spin_lock(&nm_i->free_nid_list_lock); 13138a7ed66aSJaegeuk Kim if (radix_tree_insert(&nm_i->free_nid_root, i->nid, i)) { 1314e05df3b1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1315e05df3b1SJaegeuk Kim kmem_cache_free(free_nid_slab, i); 1316e05df3b1SJaegeuk Kim return 0; 1317e05df3b1SJaegeuk Kim } 1318e05df3b1SJaegeuk Kim list_add_tail(&i->list, &nm_i->free_nid_list); 1319e05df3b1SJaegeuk Kim nm_i->fcnt++; 1320e05df3b1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1321e05df3b1SJaegeuk Kim return 1; 1322e05df3b1SJaegeuk Kim } 1323e05df3b1SJaegeuk Kim 1324e05df3b1SJaegeuk Kim static void remove_free_nid(struct f2fs_nm_info *nm_i, nid_t nid) 1325e05df3b1SJaegeuk Kim { 1326e05df3b1SJaegeuk Kim struct free_nid *i; 1327e05df3b1SJaegeuk Kim spin_lock(&nm_i->free_nid_list_lock); 13288a7ed66aSJaegeuk Kim i = __lookup_free_nid_list(nm_i, nid); 1329e05df3b1SJaegeuk Kim if (i && i->state == NID_NEW) { 13308a7ed66aSJaegeuk Kim __del_from_free_nid_list(nm_i, i); 1331e05df3b1SJaegeuk Kim nm_i->fcnt--; 1332e05df3b1SJaegeuk Kim } 1333e05df3b1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1334e05df3b1SJaegeuk Kim } 1335e05df3b1SJaegeuk Kim 13368760952dSHaicheng Li static void scan_nat_page(struct f2fs_nm_info *nm_i, 1337e05df3b1SJaegeuk Kim struct page *nat_page, nid_t start_nid) 1338e05df3b1SJaegeuk Kim { 1339e05df3b1SJaegeuk Kim struct f2fs_nat_block *nat_blk = page_address(nat_page); 1340e05df3b1SJaegeuk Kim block_t blk_addr; 1341e05df3b1SJaegeuk Kim int i; 1342e05df3b1SJaegeuk Kim 1343e05df3b1SJaegeuk Kim i = start_nid % NAT_ENTRY_PER_BLOCK; 1344e05df3b1SJaegeuk Kim 1345e05df3b1SJaegeuk Kim for (; i < NAT_ENTRY_PER_BLOCK; i++, start_nid++) { 134623d38844SHaicheng Li 1347cfb271d4SChao Yu if (unlikely(start_nid >= nm_i->max_nid)) 134804431c44SJaegeuk Kim break; 134923d38844SHaicheng Li 1350e05df3b1SJaegeuk Kim blk_addr = le32_to_cpu(nat_blk->entries[i].block_addr); 13515d56b671SJaegeuk Kim f2fs_bug_on(blk_addr == NEW_ADDR); 135223d38844SHaicheng Li if (blk_addr == NULL_ADDR) { 135359bbd474SJaegeuk Kim if (add_free_nid(nm_i, start_nid, true) < 0) 135423d38844SHaicheng Li break; 135523d38844SHaicheng Li } 1356e05df3b1SJaegeuk Kim } 1357e05df3b1SJaegeuk Kim } 1358e05df3b1SJaegeuk Kim 1359e05df3b1SJaegeuk Kim static void build_free_nids(struct f2fs_sb_info *sbi) 1360e05df3b1SJaegeuk Kim { 1361e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1362e05df3b1SJaegeuk Kim struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); 1363e05df3b1SJaegeuk Kim struct f2fs_summary_block *sum = curseg->sum_blk; 13648760952dSHaicheng Li int i = 0; 136555008d84SJaegeuk Kim nid_t nid = nm_i->next_scan_nid; 1366e05df3b1SJaegeuk Kim 136755008d84SJaegeuk Kim /* Enough entries */ 136855008d84SJaegeuk Kim if (nm_i->fcnt > NAT_ENTRY_PER_BLOCK) 136955008d84SJaegeuk Kim return; 1370e05df3b1SJaegeuk Kim 137155008d84SJaegeuk Kim /* readahead nat pages to be scanned */ 1372662befdaSChao Yu ra_meta_pages(sbi, NAT_BLOCK_OFFSET(nid), FREE_NID_PAGES, META_NAT); 1373e05df3b1SJaegeuk Kim 1374e05df3b1SJaegeuk Kim while (1) { 1375e05df3b1SJaegeuk Kim struct page *page = get_current_nat_page(sbi, nid); 1376e05df3b1SJaegeuk Kim 13778760952dSHaicheng Li scan_nat_page(nm_i, page, nid); 1378e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 1379e05df3b1SJaegeuk Kim 1380e05df3b1SJaegeuk Kim nid += (NAT_ENTRY_PER_BLOCK - (nid % NAT_ENTRY_PER_BLOCK)); 1381cfb271d4SChao Yu if (unlikely(nid >= nm_i->max_nid)) 1382e05df3b1SJaegeuk Kim nid = 0; 138355008d84SJaegeuk Kim 138455008d84SJaegeuk Kim if (i++ == FREE_NID_PAGES) 1385e05df3b1SJaegeuk Kim break; 1386e05df3b1SJaegeuk Kim } 1387e05df3b1SJaegeuk Kim 138855008d84SJaegeuk Kim /* go to the next free nat pages to find free nids abundantly */ 138955008d84SJaegeuk Kim nm_i->next_scan_nid = nid; 1390e05df3b1SJaegeuk Kim 1391e05df3b1SJaegeuk Kim /* find free nids from current sum_pages */ 1392e05df3b1SJaegeuk Kim mutex_lock(&curseg->curseg_mutex); 1393e05df3b1SJaegeuk Kim for (i = 0; i < nats_in_cursum(sum); i++) { 1394e05df3b1SJaegeuk Kim block_t addr = le32_to_cpu(nat_in_journal(sum, i).block_addr); 1395e05df3b1SJaegeuk Kim nid = le32_to_cpu(nid_in_journal(sum, i)); 1396e05df3b1SJaegeuk Kim if (addr == NULL_ADDR) 139759bbd474SJaegeuk Kim add_free_nid(nm_i, nid, true); 1398e05df3b1SJaegeuk Kim else 1399e05df3b1SJaegeuk Kim remove_free_nid(nm_i, nid); 1400e05df3b1SJaegeuk Kim } 1401e05df3b1SJaegeuk Kim mutex_unlock(&curseg->curseg_mutex); 1402e05df3b1SJaegeuk Kim } 1403e05df3b1SJaegeuk Kim 1404e05df3b1SJaegeuk Kim /* 1405e05df3b1SJaegeuk Kim * If this function returns success, caller can obtain a new nid 1406e05df3b1SJaegeuk Kim * from second parameter of this function. 1407e05df3b1SJaegeuk Kim * The returned nid could be used ino as well as nid when inode is created. 1408e05df3b1SJaegeuk Kim */ 1409e05df3b1SJaegeuk Kim bool alloc_nid(struct f2fs_sb_info *sbi, nid_t *nid) 1410e05df3b1SJaegeuk Kim { 1411e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1412e05df3b1SJaegeuk Kim struct free_nid *i = NULL; 1413e05df3b1SJaegeuk Kim struct list_head *this; 1414e05df3b1SJaegeuk Kim retry: 1415cfb271d4SChao Yu if (unlikely(sbi->total_valid_node_count + 1 >= nm_i->max_nid)) 1416e05df3b1SJaegeuk Kim return false; 1417e05df3b1SJaegeuk Kim 1418e05df3b1SJaegeuk Kim spin_lock(&nm_i->free_nid_list_lock); 1419e05df3b1SJaegeuk Kim 142055008d84SJaegeuk Kim /* We should not use stale free nids created by build_free_nids */ 1421f978f5a0SGu Zheng if (nm_i->fcnt && !on_build_free_nids(nm_i)) { 14225d56b671SJaegeuk Kim f2fs_bug_on(list_empty(&nm_i->free_nid_list)); 1423e05df3b1SJaegeuk Kim list_for_each(this, &nm_i->free_nid_list) { 1424e05df3b1SJaegeuk Kim i = list_entry(this, struct free_nid, list); 1425e05df3b1SJaegeuk Kim if (i->state == NID_NEW) 1426e05df3b1SJaegeuk Kim break; 1427e05df3b1SJaegeuk Kim } 1428e05df3b1SJaegeuk Kim 14295d56b671SJaegeuk Kim f2fs_bug_on(i->state != NID_NEW); 1430e05df3b1SJaegeuk Kim *nid = i->nid; 1431e05df3b1SJaegeuk Kim i->state = NID_ALLOC; 1432e05df3b1SJaegeuk Kim nm_i->fcnt--; 1433e05df3b1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1434e05df3b1SJaegeuk Kim return true; 1435e05df3b1SJaegeuk Kim } 143655008d84SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 143755008d84SJaegeuk Kim 143855008d84SJaegeuk Kim /* Let's scan nat pages and its caches to get free nids */ 143955008d84SJaegeuk Kim mutex_lock(&nm_i->build_lock); 144055008d84SJaegeuk Kim build_free_nids(sbi); 144155008d84SJaegeuk Kim mutex_unlock(&nm_i->build_lock); 144255008d84SJaegeuk Kim goto retry; 144355008d84SJaegeuk Kim } 1444e05df3b1SJaegeuk Kim 14450a8165d7SJaegeuk Kim /* 1446e05df3b1SJaegeuk Kim * alloc_nid() should be called prior to this function. 1447e05df3b1SJaegeuk Kim */ 1448e05df3b1SJaegeuk Kim void alloc_nid_done(struct f2fs_sb_info *sbi, nid_t nid) 1449e05df3b1SJaegeuk Kim { 1450e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1451e05df3b1SJaegeuk Kim struct free_nid *i; 1452e05df3b1SJaegeuk Kim 1453e05df3b1SJaegeuk Kim spin_lock(&nm_i->free_nid_list_lock); 14548a7ed66aSJaegeuk Kim i = __lookup_free_nid_list(nm_i, nid); 14555d56b671SJaegeuk Kim f2fs_bug_on(!i || i->state != NID_ALLOC); 14568a7ed66aSJaegeuk Kim __del_from_free_nid_list(nm_i, i); 1457e05df3b1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1458e05df3b1SJaegeuk Kim } 1459e05df3b1SJaegeuk Kim 14600a8165d7SJaegeuk Kim /* 1461e05df3b1SJaegeuk Kim * alloc_nid() should be called prior to this function. 1462e05df3b1SJaegeuk Kim */ 1463e05df3b1SJaegeuk Kim void alloc_nid_failed(struct f2fs_sb_info *sbi, nid_t nid) 1464e05df3b1SJaegeuk Kim { 146549952fa1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 146649952fa1SJaegeuk Kim struct free_nid *i; 146749952fa1SJaegeuk Kim 146865985d93SJaegeuk Kim if (!nid) 146965985d93SJaegeuk Kim return; 147065985d93SJaegeuk Kim 147149952fa1SJaegeuk Kim spin_lock(&nm_i->free_nid_list_lock); 14728a7ed66aSJaegeuk Kim i = __lookup_free_nid_list(nm_i, nid); 14735d56b671SJaegeuk Kim f2fs_bug_on(!i || i->state != NID_ALLOC); 147495630cbaSHaicheng Li if (nm_i->fcnt > 2 * MAX_FREE_NIDS) { 14758a7ed66aSJaegeuk Kim __del_from_free_nid_list(nm_i, i); 147695630cbaSHaicheng Li } else { 147749952fa1SJaegeuk Kim i->state = NID_NEW; 147849952fa1SJaegeuk Kim nm_i->fcnt++; 147995630cbaSHaicheng Li } 148049952fa1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1481e05df3b1SJaegeuk Kim } 1482e05df3b1SJaegeuk Kim 1483e05df3b1SJaegeuk Kim void recover_node_page(struct f2fs_sb_info *sbi, struct page *page, 1484e05df3b1SJaegeuk Kim struct f2fs_summary *sum, struct node_info *ni, 1485e05df3b1SJaegeuk Kim block_t new_blkaddr) 1486e05df3b1SJaegeuk Kim { 1487e05df3b1SJaegeuk Kim rewrite_node_page(sbi, page, sum, ni->blk_addr, new_blkaddr); 1488e05df3b1SJaegeuk Kim set_node_addr(sbi, ni, new_blkaddr); 1489e05df3b1SJaegeuk Kim clear_node_page_dirty(page); 1490e05df3b1SJaegeuk Kim } 1491e05df3b1SJaegeuk Kim 149228cdce04SChao Yu void recover_inline_xattr(struct inode *inode, struct page *page) 149328cdce04SChao Yu { 149428cdce04SChao Yu struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); 149528cdce04SChao Yu void *src_addr, *dst_addr; 149628cdce04SChao Yu size_t inline_size; 149728cdce04SChao Yu struct page *ipage; 149828cdce04SChao Yu struct f2fs_inode *ri; 149928cdce04SChao Yu 1500987c7c31SChao Yu if (!f2fs_has_inline_xattr(inode)) 150128cdce04SChao Yu return; 150228cdce04SChao Yu 150328cdce04SChao Yu if (!IS_INODE(page)) 150428cdce04SChao Yu return; 150528cdce04SChao Yu 150628cdce04SChao Yu ri = F2FS_INODE(page); 150728cdce04SChao Yu if (!(ri->i_inline & F2FS_INLINE_XATTR)) 150828cdce04SChao Yu return; 150928cdce04SChao Yu 151028cdce04SChao Yu ipage = get_node_page(sbi, inode->i_ino); 151128cdce04SChao Yu f2fs_bug_on(IS_ERR(ipage)); 151228cdce04SChao Yu 151328cdce04SChao Yu dst_addr = inline_xattr_addr(ipage); 151428cdce04SChao Yu src_addr = inline_xattr_addr(page); 151528cdce04SChao Yu inline_size = inline_xattr_size(inode); 151628cdce04SChao Yu 151728cdce04SChao Yu memcpy(dst_addr, src_addr, inline_size); 151828cdce04SChao Yu 151928cdce04SChao Yu update_inode(inode, ipage); 152028cdce04SChao Yu f2fs_put_page(ipage, 1); 152128cdce04SChao Yu } 152228cdce04SChao Yu 1523abb2366cSJaegeuk Kim bool recover_xattr_data(struct inode *inode, struct page *page, block_t blkaddr) 1524abb2366cSJaegeuk Kim { 1525abb2366cSJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); 1526abb2366cSJaegeuk Kim nid_t prev_xnid = F2FS_I(inode)->i_xattr_nid; 1527abb2366cSJaegeuk Kim nid_t new_xnid = nid_of_node(page); 1528abb2366cSJaegeuk Kim struct node_info ni; 1529abb2366cSJaegeuk Kim 153028cdce04SChao Yu recover_inline_xattr(inode, page); 153128cdce04SChao Yu 15324bc8e9bcSChao Yu if (!f2fs_has_xattr_block(ofs_of_node(page))) 1533abb2366cSJaegeuk Kim return false; 1534abb2366cSJaegeuk Kim 1535abb2366cSJaegeuk Kim /* 1: invalidate the previous xattr nid */ 1536abb2366cSJaegeuk Kim if (!prev_xnid) 1537abb2366cSJaegeuk Kim goto recover_xnid; 1538abb2366cSJaegeuk Kim 1539abb2366cSJaegeuk Kim /* Deallocate node address */ 1540abb2366cSJaegeuk Kim get_node_info(sbi, prev_xnid, &ni); 1541abb2366cSJaegeuk Kim f2fs_bug_on(ni.blk_addr == NULL_ADDR); 1542abb2366cSJaegeuk Kim invalidate_blocks(sbi, ni.blk_addr); 1543abb2366cSJaegeuk Kim dec_valid_node_count(sbi, inode); 1544abb2366cSJaegeuk Kim set_node_addr(sbi, &ni, NULL_ADDR); 1545abb2366cSJaegeuk Kim 1546abb2366cSJaegeuk Kim recover_xnid: 1547abb2366cSJaegeuk Kim /* 2: allocate new xattr nid */ 1548abb2366cSJaegeuk Kim if (unlikely(!inc_valid_node_count(sbi, inode))) 1549abb2366cSJaegeuk Kim f2fs_bug_on(1); 1550abb2366cSJaegeuk Kim 1551abb2366cSJaegeuk Kim remove_free_nid(NM_I(sbi), new_xnid); 1552abb2366cSJaegeuk Kim get_node_info(sbi, new_xnid, &ni); 1553abb2366cSJaegeuk Kim ni.ino = inode->i_ino; 1554abb2366cSJaegeuk Kim set_node_addr(sbi, &ni, NEW_ADDR); 1555abb2366cSJaegeuk Kim F2FS_I(inode)->i_xattr_nid = new_xnid; 1556abb2366cSJaegeuk Kim 1557abb2366cSJaegeuk Kim /* 3: update xattr blkaddr */ 1558abb2366cSJaegeuk Kim refresh_sit_entry(sbi, NEW_ADDR, blkaddr); 1559abb2366cSJaegeuk Kim set_node_addr(sbi, &ni, blkaddr); 1560abb2366cSJaegeuk Kim 1561abb2366cSJaegeuk Kim update_inode_page(inode); 1562abb2366cSJaegeuk Kim return true; 1563abb2366cSJaegeuk Kim } 1564abb2366cSJaegeuk Kim 1565e05df3b1SJaegeuk Kim int recover_inode_page(struct f2fs_sb_info *sbi, struct page *page) 1566e05df3b1SJaegeuk Kim { 156758bfaf44SJaegeuk Kim struct f2fs_inode *src, *dst; 1568e05df3b1SJaegeuk Kim nid_t ino = ino_of_node(page); 1569e05df3b1SJaegeuk Kim struct node_info old_ni, new_ni; 1570e05df3b1SJaegeuk Kim struct page *ipage; 1571e05df3b1SJaegeuk Kim 15724ef51a8fSJaegeuk Kim ipage = grab_cache_page(NODE_MAPPING(sbi), ino); 1573e05df3b1SJaegeuk Kim if (!ipage) 1574e05df3b1SJaegeuk Kim return -ENOMEM; 1575e05df3b1SJaegeuk Kim 1576e05df3b1SJaegeuk Kim /* Should not use this inode from free nid list */ 1577e05df3b1SJaegeuk Kim remove_free_nid(NM_I(sbi), ino); 1578e05df3b1SJaegeuk Kim 1579e05df3b1SJaegeuk Kim get_node_info(sbi, ino, &old_ni); 1580e05df3b1SJaegeuk Kim SetPageUptodate(ipage); 1581e05df3b1SJaegeuk Kim fill_node_footer(ipage, ino, ino, 0, true); 1582e05df3b1SJaegeuk Kim 158358bfaf44SJaegeuk Kim src = F2FS_INODE(page); 158458bfaf44SJaegeuk Kim dst = F2FS_INODE(ipage); 1585e05df3b1SJaegeuk Kim 158658bfaf44SJaegeuk Kim memcpy(dst, src, (unsigned long)&src->i_ext - (unsigned long)src); 158758bfaf44SJaegeuk Kim dst->i_size = 0; 158858bfaf44SJaegeuk Kim dst->i_blocks = cpu_to_le64(1); 158958bfaf44SJaegeuk Kim dst->i_links = cpu_to_le32(1); 159058bfaf44SJaegeuk Kim dst->i_xattr_nid = 0; 1591e05df3b1SJaegeuk Kim 1592e05df3b1SJaegeuk Kim new_ni = old_ni; 1593e05df3b1SJaegeuk Kim new_ni.ino = ino; 1594e05df3b1SJaegeuk Kim 1595cfb271d4SChao Yu if (unlikely(!inc_valid_node_count(sbi, NULL))) 159665e5cd0aSJaegeuk Kim WARN_ON(1); 1597e05df3b1SJaegeuk Kim set_node_addr(sbi, &new_ni, NEW_ADDR); 1598e05df3b1SJaegeuk Kim inc_valid_inode_count(sbi); 1599e05df3b1SJaegeuk Kim f2fs_put_page(ipage, 1); 1600e05df3b1SJaegeuk Kim return 0; 1601e05df3b1SJaegeuk Kim } 1602e05df3b1SJaegeuk Kim 16039af0ff1cSChao Yu /* 16049af0ff1cSChao Yu * ra_sum_pages() merge contiguous pages into one bio and submit. 16059af0ff1cSChao Yu * these pre-readed pages are linked in pages list. 16069af0ff1cSChao Yu */ 16079af0ff1cSChao Yu static int ra_sum_pages(struct f2fs_sb_info *sbi, struct list_head *pages, 16089af0ff1cSChao Yu int start, int nrpages) 16099af0ff1cSChao Yu { 16109af0ff1cSChao Yu struct page *page; 16119af0ff1cSChao Yu int page_idx = start; 1612458e6197SJaegeuk Kim struct f2fs_io_info fio = { 1613458e6197SJaegeuk Kim .type = META, 16147e8f2308SGu Zheng .rw = READ_SYNC | REQ_META | REQ_PRIO 1615458e6197SJaegeuk Kim }; 16169af0ff1cSChao Yu 16179af0ff1cSChao Yu for (; page_idx < start + nrpages; page_idx++) { 16189af0ff1cSChao Yu /* alloc temporal page for read node summary info*/ 1619a0acdfe0SChao Yu page = alloc_page(GFP_F2FS_ZERO); 1620d653788aSGu Zheng if (!page) 1621d653788aSGu Zheng break; 16229af0ff1cSChao Yu 16239af0ff1cSChao Yu lock_page(page); 16249af0ff1cSChao Yu page->index = page_idx; 16259af0ff1cSChao Yu list_add_tail(&page->lru, pages); 16269af0ff1cSChao Yu } 16279af0ff1cSChao Yu 16289af0ff1cSChao Yu list_for_each_entry(page, pages, lru) 1629458e6197SJaegeuk Kim f2fs_submit_page_mbio(sbi, page, page->index, &fio); 16309af0ff1cSChao Yu 1631458e6197SJaegeuk Kim f2fs_submit_merged_bio(sbi, META, READ); 1632d653788aSGu Zheng 1633d653788aSGu Zheng return page_idx - start; 16349af0ff1cSChao Yu } 16359af0ff1cSChao Yu 1636e05df3b1SJaegeuk Kim int restore_node_summary(struct f2fs_sb_info *sbi, 1637e05df3b1SJaegeuk Kim unsigned int segno, struct f2fs_summary_block *sum) 1638e05df3b1SJaegeuk Kim { 1639e05df3b1SJaegeuk Kim struct f2fs_node *rn; 1640e05df3b1SJaegeuk Kim struct f2fs_summary *sum_entry; 16419af0ff1cSChao Yu struct page *page, *tmp; 1642e05df3b1SJaegeuk Kim block_t addr; 16439af0ff1cSChao Yu int bio_blocks = MAX_BIO_BLOCKS(max_hw_blocks(sbi)); 16449af0ff1cSChao Yu int i, last_offset, nrpages, err = 0; 16459af0ff1cSChao Yu LIST_HEAD(page_list); 1646e05df3b1SJaegeuk Kim 1647e05df3b1SJaegeuk Kim /* scan the node segment */ 1648e05df3b1SJaegeuk Kim last_offset = sbi->blocks_per_seg; 1649e05df3b1SJaegeuk Kim addr = START_BLOCK(sbi, segno); 1650e05df3b1SJaegeuk Kim sum_entry = &sum->entries[0]; 1651e05df3b1SJaegeuk Kim 1652d653788aSGu Zheng for (i = 0; !err && i < last_offset; i += nrpages, addr += nrpages) { 16539af0ff1cSChao Yu nrpages = min(last_offset - i, bio_blocks); 1654393ff91fSJaegeuk Kim 16559af0ff1cSChao Yu /* read ahead node pages */ 1656d653788aSGu Zheng nrpages = ra_sum_pages(sbi, &page_list, addr, nrpages); 1657d653788aSGu Zheng if (!nrpages) 1658d653788aSGu Zheng return -ENOMEM; 16599af0ff1cSChao Yu 16609af0ff1cSChao Yu list_for_each_entry_safe(page, tmp, &page_list, lru) { 1661d653788aSGu Zheng if (err) 1662d653788aSGu Zheng goto skip; 1663393ff91fSJaegeuk Kim 1664393ff91fSJaegeuk Kim lock_page(page); 16656bacf52fSJaegeuk Kim if (unlikely(!PageUptodate(page))) { 16666bacf52fSJaegeuk Kim err = -EIO; 16676bacf52fSJaegeuk Kim } else { 166845590710SGu Zheng rn = F2FS_NODE(page); 1669393ff91fSJaegeuk Kim sum_entry->nid = rn->footer.nid; 1670393ff91fSJaegeuk Kim sum_entry->version = 0; 1671393ff91fSJaegeuk Kim sum_entry->ofs_in_node = 0; 16729af0ff1cSChao Yu sum_entry++; 1673e05df3b1SJaegeuk Kim } 1674e05df3b1SJaegeuk Kim unlock_page(page); 1675d653788aSGu Zheng skip: 1676d653788aSGu Zheng list_del(&page->lru); 1677e05df3b1SJaegeuk Kim __free_pages(page, 0); 16789af0ff1cSChao Yu } 16799af0ff1cSChao Yu } 16809af0ff1cSChao Yu return err; 1681e05df3b1SJaegeuk Kim } 1682e05df3b1SJaegeuk Kim 1683e05df3b1SJaegeuk Kim static bool flush_nats_in_journal(struct f2fs_sb_info *sbi) 1684e05df3b1SJaegeuk Kim { 1685e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1686e05df3b1SJaegeuk Kim struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); 1687e05df3b1SJaegeuk Kim struct f2fs_summary_block *sum = curseg->sum_blk; 1688e05df3b1SJaegeuk Kim int i; 1689e05df3b1SJaegeuk Kim 1690e05df3b1SJaegeuk Kim mutex_lock(&curseg->curseg_mutex); 1691e05df3b1SJaegeuk Kim 1692e05df3b1SJaegeuk Kim if (nats_in_cursum(sum) < NAT_JOURNAL_ENTRIES) { 1693e05df3b1SJaegeuk Kim mutex_unlock(&curseg->curseg_mutex); 1694e05df3b1SJaegeuk Kim return false; 1695e05df3b1SJaegeuk Kim } 1696e05df3b1SJaegeuk Kim 1697e05df3b1SJaegeuk Kim for (i = 0; i < nats_in_cursum(sum); i++) { 1698e05df3b1SJaegeuk Kim struct nat_entry *ne; 1699e05df3b1SJaegeuk Kim struct f2fs_nat_entry raw_ne; 1700e05df3b1SJaegeuk Kim nid_t nid = le32_to_cpu(nid_in_journal(sum, i)); 1701e05df3b1SJaegeuk Kim 1702e05df3b1SJaegeuk Kim raw_ne = nat_in_journal(sum, i); 1703e05df3b1SJaegeuk Kim retry: 1704e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 1705e05df3b1SJaegeuk Kim ne = __lookup_nat_cache(nm_i, nid); 1706e05df3b1SJaegeuk Kim if (ne) { 1707e05df3b1SJaegeuk Kim __set_nat_cache_dirty(nm_i, ne); 1708e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 1709e05df3b1SJaegeuk Kim continue; 1710e05df3b1SJaegeuk Kim } 1711e05df3b1SJaegeuk Kim ne = grab_nat_entry(nm_i, nid); 1712e05df3b1SJaegeuk Kim if (!ne) { 1713e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 1714e05df3b1SJaegeuk Kim goto retry; 1715e05df3b1SJaegeuk Kim } 1716e05df3b1SJaegeuk Kim nat_set_blkaddr(ne, le32_to_cpu(raw_ne.block_addr)); 1717e05df3b1SJaegeuk Kim nat_set_ino(ne, le32_to_cpu(raw_ne.ino)); 1718e05df3b1SJaegeuk Kim nat_set_version(ne, raw_ne.version); 1719e05df3b1SJaegeuk Kim __set_nat_cache_dirty(nm_i, ne); 1720e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 1721e05df3b1SJaegeuk Kim } 1722e05df3b1SJaegeuk Kim update_nats_in_cursum(sum, -i); 1723e05df3b1SJaegeuk Kim mutex_unlock(&curseg->curseg_mutex); 1724e05df3b1SJaegeuk Kim return true; 1725e05df3b1SJaegeuk Kim } 1726e05df3b1SJaegeuk Kim 17270a8165d7SJaegeuk Kim /* 1728e05df3b1SJaegeuk Kim * This function is called during the checkpointing process. 1729e05df3b1SJaegeuk Kim */ 1730e05df3b1SJaegeuk Kim void flush_nat_entries(struct f2fs_sb_info *sbi) 1731e05df3b1SJaegeuk Kim { 1732e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1733e05df3b1SJaegeuk Kim struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); 1734e05df3b1SJaegeuk Kim struct f2fs_summary_block *sum = curseg->sum_blk; 1735e05df3b1SJaegeuk Kim struct list_head *cur, *n; 1736e05df3b1SJaegeuk Kim struct page *page = NULL; 1737e05df3b1SJaegeuk Kim struct f2fs_nat_block *nat_blk = NULL; 1738e05df3b1SJaegeuk Kim nid_t start_nid = 0, end_nid = 0; 1739e05df3b1SJaegeuk Kim bool flushed; 1740e05df3b1SJaegeuk Kim 1741e05df3b1SJaegeuk Kim flushed = flush_nats_in_journal(sbi); 1742e05df3b1SJaegeuk Kim 1743e05df3b1SJaegeuk Kim if (!flushed) 1744e05df3b1SJaegeuk Kim mutex_lock(&curseg->curseg_mutex); 1745e05df3b1SJaegeuk Kim 1746e05df3b1SJaegeuk Kim /* 1) flush dirty nat caches */ 1747e05df3b1SJaegeuk Kim list_for_each_safe(cur, n, &nm_i->dirty_nat_entries) { 1748e05df3b1SJaegeuk Kim struct nat_entry *ne; 1749e05df3b1SJaegeuk Kim nid_t nid; 1750e05df3b1SJaegeuk Kim struct f2fs_nat_entry raw_ne; 1751e05df3b1SJaegeuk Kim int offset = -1; 17522b50638dSJaegeuk Kim block_t new_blkaddr; 1753e05df3b1SJaegeuk Kim 1754e05df3b1SJaegeuk Kim ne = list_entry(cur, struct nat_entry, list); 1755e05df3b1SJaegeuk Kim nid = nat_get_nid(ne); 1756e05df3b1SJaegeuk Kim 1757e05df3b1SJaegeuk Kim if (nat_get_blkaddr(ne) == NEW_ADDR) 1758e05df3b1SJaegeuk Kim continue; 1759e05df3b1SJaegeuk Kim if (flushed) 1760e05df3b1SJaegeuk Kim goto to_nat_page; 1761e05df3b1SJaegeuk Kim 1762e05df3b1SJaegeuk Kim /* if there is room for nat enries in curseg->sumpage */ 1763e05df3b1SJaegeuk Kim offset = lookup_journal_in_cursum(sum, NAT_JOURNAL, nid, 1); 1764e05df3b1SJaegeuk Kim if (offset >= 0) { 1765e05df3b1SJaegeuk Kim raw_ne = nat_in_journal(sum, offset); 1766e05df3b1SJaegeuk Kim goto flush_now; 1767e05df3b1SJaegeuk Kim } 1768e05df3b1SJaegeuk Kim to_nat_page: 1769e05df3b1SJaegeuk Kim if (!page || (start_nid > nid || nid > end_nid)) { 1770e05df3b1SJaegeuk Kim if (page) { 1771e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 1772e05df3b1SJaegeuk Kim page = NULL; 1773e05df3b1SJaegeuk Kim } 1774e05df3b1SJaegeuk Kim start_nid = START_NID(nid); 1775e05df3b1SJaegeuk Kim end_nid = start_nid + NAT_ENTRY_PER_BLOCK - 1; 1776e05df3b1SJaegeuk Kim 1777e05df3b1SJaegeuk Kim /* 1778e05df3b1SJaegeuk Kim * get nat block with dirty flag, increased reference 1779e05df3b1SJaegeuk Kim * count, mapped and lock 1780e05df3b1SJaegeuk Kim */ 1781e05df3b1SJaegeuk Kim page = get_next_nat_page(sbi, start_nid); 1782e05df3b1SJaegeuk Kim nat_blk = page_address(page); 1783e05df3b1SJaegeuk Kim } 1784e05df3b1SJaegeuk Kim 17855d56b671SJaegeuk Kim f2fs_bug_on(!nat_blk); 1786e05df3b1SJaegeuk Kim raw_ne = nat_blk->entries[nid - start_nid]; 1787e05df3b1SJaegeuk Kim flush_now: 1788e05df3b1SJaegeuk Kim new_blkaddr = nat_get_blkaddr(ne); 1789e05df3b1SJaegeuk Kim 1790e05df3b1SJaegeuk Kim raw_ne.ino = cpu_to_le32(nat_get_ino(ne)); 1791e05df3b1SJaegeuk Kim raw_ne.block_addr = cpu_to_le32(new_blkaddr); 1792e05df3b1SJaegeuk Kim raw_ne.version = nat_get_version(ne); 1793e05df3b1SJaegeuk Kim 1794e05df3b1SJaegeuk Kim if (offset < 0) { 1795e05df3b1SJaegeuk Kim nat_blk->entries[nid - start_nid] = raw_ne; 1796e05df3b1SJaegeuk Kim } else { 1797e05df3b1SJaegeuk Kim nat_in_journal(sum, offset) = raw_ne; 1798e05df3b1SJaegeuk Kim nid_in_journal(sum, offset) = cpu_to_le32(nid); 1799e05df3b1SJaegeuk Kim } 1800e05df3b1SJaegeuk Kim 1801fa372417SJaegeuk Kim if (nat_get_blkaddr(ne) == NULL_ADDR && 180259bbd474SJaegeuk Kim add_free_nid(NM_I(sbi), nid, false) <= 0) { 1803e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 1804e05df3b1SJaegeuk Kim __del_from_nat_cache(nm_i, ne); 1805e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 1806e05df3b1SJaegeuk Kim } else { 1807e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 1808e05df3b1SJaegeuk Kim __clear_nat_cache_dirty(nm_i, ne); 1809e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 1810e05df3b1SJaegeuk Kim } 1811e05df3b1SJaegeuk Kim } 1812e05df3b1SJaegeuk Kim if (!flushed) 1813e05df3b1SJaegeuk Kim mutex_unlock(&curseg->curseg_mutex); 1814e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 1815e05df3b1SJaegeuk Kim 1816e05df3b1SJaegeuk Kim /* 2) shrink nat caches if necessary */ 1817e05df3b1SJaegeuk Kim try_to_free_nats(sbi, nm_i->nat_cnt - NM_WOUT_THRESHOLD); 1818e05df3b1SJaegeuk Kim } 1819e05df3b1SJaegeuk Kim 1820e05df3b1SJaegeuk Kim static int init_node_manager(struct f2fs_sb_info *sbi) 1821e05df3b1SJaegeuk Kim { 1822e05df3b1SJaegeuk Kim struct f2fs_super_block *sb_raw = F2FS_RAW_SUPER(sbi); 1823e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1824e05df3b1SJaegeuk Kim unsigned char *version_bitmap; 1825e05df3b1SJaegeuk Kim unsigned int nat_segs, nat_blocks; 1826e05df3b1SJaegeuk Kim 1827e05df3b1SJaegeuk Kim nm_i->nat_blkaddr = le32_to_cpu(sb_raw->nat_blkaddr); 1828e05df3b1SJaegeuk Kim 1829e05df3b1SJaegeuk Kim /* segment_count_nat includes pair segment so divide to 2. */ 1830e05df3b1SJaegeuk Kim nat_segs = le32_to_cpu(sb_raw->segment_count_nat) >> 1; 1831e05df3b1SJaegeuk Kim nat_blocks = nat_segs << le32_to_cpu(sb_raw->log_blocks_per_seg); 1832b63da15eSJaegeuk Kim 1833b63da15eSJaegeuk Kim /* not used nids: 0, node, meta, (and root counted as valid node) */ 1834b63da15eSJaegeuk Kim nm_i->max_nid = NAT_ENTRY_PER_BLOCK * nat_blocks - 3; 1835e05df3b1SJaegeuk Kim nm_i->fcnt = 0; 1836e05df3b1SJaegeuk Kim nm_i->nat_cnt = 0; 1837e05df3b1SJaegeuk Kim 18388a7ed66aSJaegeuk Kim INIT_RADIX_TREE(&nm_i->free_nid_root, GFP_ATOMIC); 1839e05df3b1SJaegeuk Kim INIT_LIST_HEAD(&nm_i->free_nid_list); 1840e05df3b1SJaegeuk Kim INIT_RADIX_TREE(&nm_i->nat_root, GFP_ATOMIC); 1841e05df3b1SJaegeuk Kim INIT_LIST_HEAD(&nm_i->nat_entries); 1842e05df3b1SJaegeuk Kim INIT_LIST_HEAD(&nm_i->dirty_nat_entries); 1843e05df3b1SJaegeuk Kim 1844e05df3b1SJaegeuk Kim mutex_init(&nm_i->build_lock); 1845e05df3b1SJaegeuk Kim spin_lock_init(&nm_i->free_nid_list_lock); 1846e05df3b1SJaegeuk Kim rwlock_init(&nm_i->nat_tree_lock); 1847e05df3b1SJaegeuk Kim 1848e05df3b1SJaegeuk Kim nm_i->next_scan_nid = le32_to_cpu(sbi->ckpt->next_free_nid); 184979b5793bSAlexandru Gheorghiu nm_i->bitmap_size = __bitmap_size(sbi, NAT_BITMAP); 1850e05df3b1SJaegeuk Kim version_bitmap = __bitmap_ptr(sbi, NAT_BITMAP); 1851e05df3b1SJaegeuk Kim if (!version_bitmap) 1852e05df3b1SJaegeuk Kim return -EFAULT; 1853e05df3b1SJaegeuk Kim 185479b5793bSAlexandru Gheorghiu nm_i->nat_bitmap = kmemdup(version_bitmap, nm_i->bitmap_size, 185579b5793bSAlexandru Gheorghiu GFP_KERNEL); 185679b5793bSAlexandru Gheorghiu if (!nm_i->nat_bitmap) 185779b5793bSAlexandru Gheorghiu return -ENOMEM; 1858e05df3b1SJaegeuk Kim return 0; 1859e05df3b1SJaegeuk Kim } 1860e05df3b1SJaegeuk Kim 1861e05df3b1SJaegeuk Kim int build_node_manager(struct f2fs_sb_info *sbi) 1862e05df3b1SJaegeuk Kim { 1863e05df3b1SJaegeuk Kim int err; 1864e05df3b1SJaegeuk Kim 1865e05df3b1SJaegeuk Kim sbi->nm_info = kzalloc(sizeof(struct f2fs_nm_info), GFP_KERNEL); 1866e05df3b1SJaegeuk Kim if (!sbi->nm_info) 1867e05df3b1SJaegeuk Kim return -ENOMEM; 1868e05df3b1SJaegeuk Kim 1869e05df3b1SJaegeuk Kim err = init_node_manager(sbi); 1870e05df3b1SJaegeuk Kim if (err) 1871e05df3b1SJaegeuk Kim return err; 1872e05df3b1SJaegeuk Kim 1873e05df3b1SJaegeuk Kim build_free_nids(sbi); 1874e05df3b1SJaegeuk Kim return 0; 1875e05df3b1SJaegeuk Kim } 1876e05df3b1SJaegeuk Kim 1877e05df3b1SJaegeuk Kim void destroy_node_manager(struct f2fs_sb_info *sbi) 1878e05df3b1SJaegeuk Kim { 1879e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1880e05df3b1SJaegeuk Kim struct free_nid *i, *next_i; 1881e05df3b1SJaegeuk Kim struct nat_entry *natvec[NATVEC_SIZE]; 1882e05df3b1SJaegeuk Kim nid_t nid = 0; 1883e05df3b1SJaegeuk Kim unsigned int found; 1884e05df3b1SJaegeuk Kim 1885e05df3b1SJaegeuk Kim if (!nm_i) 1886e05df3b1SJaegeuk Kim return; 1887e05df3b1SJaegeuk Kim 1888e05df3b1SJaegeuk Kim /* destroy free nid list */ 1889e05df3b1SJaegeuk Kim spin_lock(&nm_i->free_nid_list_lock); 1890e05df3b1SJaegeuk Kim list_for_each_entry_safe(i, next_i, &nm_i->free_nid_list, list) { 18915d56b671SJaegeuk Kim f2fs_bug_on(i->state == NID_ALLOC); 18928a7ed66aSJaegeuk Kim __del_from_free_nid_list(nm_i, i); 1893e05df3b1SJaegeuk Kim nm_i->fcnt--; 1894e05df3b1SJaegeuk Kim } 18955d56b671SJaegeuk Kim f2fs_bug_on(nm_i->fcnt); 1896e05df3b1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1897e05df3b1SJaegeuk Kim 1898e05df3b1SJaegeuk Kim /* destroy nat cache */ 1899e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 1900e05df3b1SJaegeuk Kim while ((found = __gang_lookup_nat_cache(nm_i, 1901e05df3b1SJaegeuk Kim nid, NATVEC_SIZE, natvec))) { 1902e05df3b1SJaegeuk Kim unsigned idx; 1903b6ce391eSGu Zheng nid = nat_get_nid(natvec[found - 1]) + 1; 1904b6ce391eSGu Zheng for (idx = 0; idx < found; idx++) 1905b6ce391eSGu Zheng __del_from_nat_cache(nm_i, natvec[idx]); 1906e05df3b1SJaegeuk Kim } 19075d56b671SJaegeuk Kim f2fs_bug_on(nm_i->nat_cnt); 1908e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 1909e05df3b1SJaegeuk Kim 1910e05df3b1SJaegeuk Kim kfree(nm_i->nat_bitmap); 1911e05df3b1SJaegeuk Kim sbi->nm_info = NULL; 1912e05df3b1SJaegeuk Kim kfree(nm_i); 1913e05df3b1SJaegeuk Kim } 1914e05df3b1SJaegeuk Kim 19156e6093a8SNamjae Jeon int __init create_node_manager_caches(void) 1916e05df3b1SJaegeuk Kim { 1917e05df3b1SJaegeuk Kim nat_entry_slab = f2fs_kmem_cache_create("nat_entry", 1918e8512d2eSGu Zheng sizeof(struct nat_entry)); 1919e05df3b1SJaegeuk Kim if (!nat_entry_slab) 1920e05df3b1SJaegeuk Kim return -ENOMEM; 1921e05df3b1SJaegeuk Kim 1922e05df3b1SJaegeuk Kim free_nid_slab = f2fs_kmem_cache_create("free_nid", 1923e8512d2eSGu Zheng sizeof(struct free_nid)); 1924e05df3b1SJaegeuk Kim if (!free_nid_slab) { 1925e05df3b1SJaegeuk Kim kmem_cache_destroy(nat_entry_slab); 1926e05df3b1SJaegeuk Kim return -ENOMEM; 1927e05df3b1SJaegeuk Kim } 1928e05df3b1SJaegeuk Kim return 0; 1929e05df3b1SJaegeuk Kim } 1930e05df3b1SJaegeuk Kim 1931e05df3b1SJaegeuk Kim void destroy_node_manager_caches(void) 1932e05df3b1SJaegeuk Kim { 1933e05df3b1SJaegeuk Kim kmem_cache_destroy(free_nid_slab); 1934e05df3b1SJaegeuk Kim kmem_cache_destroy(nat_entry_slab); 1935e05df3b1SJaegeuk Kim } 1936