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 296fb03f3aSJaegeuk Kim bool available_free_memory(struct f2fs_sb_info *sbi, int type) 30cdfc41c1SJaegeuk Kim { 316fb03f3aSJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 32cdfc41c1SJaegeuk Kim struct sysinfo val; 33cdfc41c1SJaegeuk Kim unsigned long mem_size = 0; 346fb03f3aSJaegeuk Kim bool res = false; 35cdfc41c1SJaegeuk Kim 36cdfc41c1SJaegeuk Kim si_meminfo(&val); 376fb03f3aSJaegeuk Kim /* give 25%, 25%, 50% memory for each components respectively */ 386fb03f3aSJaegeuk Kim if (type == FREE_NIDS) { 396fb03f3aSJaegeuk Kim mem_size = (nm_i->fcnt * sizeof(struct free_nid)) >> 12; 406fb03f3aSJaegeuk Kim res = mem_size < ((val.totalram * nm_i->ram_thresh / 100) >> 2); 416fb03f3aSJaegeuk Kim } else if (type == NAT_ENTRIES) { 426fb03f3aSJaegeuk Kim mem_size = (nm_i->nat_cnt * sizeof(struct nat_entry)) >> 12; 436fb03f3aSJaegeuk Kim res = mem_size < ((val.totalram * nm_i->ram_thresh / 100) >> 2); 446fb03f3aSJaegeuk Kim } else if (type == DIRTY_DENTS) { 456fb03f3aSJaegeuk Kim mem_size = get_pages(sbi, F2FS_DIRTY_DENTS); 466fb03f3aSJaegeuk Kim res = mem_size < ((val.totalram * nm_i->ram_thresh / 100) >> 1); 476fb03f3aSJaegeuk Kim } 486fb03f3aSJaegeuk Kim return res; 49cdfc41c1SJaegeuk Kim } 50cdfc41c1SJaegeuk Kim 51e05df3b1SJaegeuk Kim static void clear_node_page_dirty(struct page *page) 52e05df3b1SJaegeuk Kim { 53e05df3b1SJaegeuk Kim struct address_space *mapping = page->mapping; 54e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(mapping->host->i_sb); 55e05df3b1SJaegeuk Kim unsigned int long flags; 56e05df3b1SJaegeuk Kim 57e05df3b1SJaegeuk Kim if (PageDirty(page)) { 58e05df3b1SJaegeuk Kim spin_lock_irqsave(&mapping->tree_lock, flags); 59e05df3b1SJaegeuk Kim radix_tree_tag_clear(&mapping->page_tree, 60e05df3b1SJaegeuk Kim page_index(page), 61e05df3b1SJaegeuk Kim PAGECACHE_TAG_DIRTY); 62e05df3b1SJaegeuk Kim spin_unlock_irqrestore(&mapping->tree_lock, flags); 63e05df3b1SJaegeuk Kim 64e05df3b1SJaegeuk Kim clear_page_dirty_for_io(page); 65e05df3b1SJaegeuk Kim dec_page_count(sbi, F2FS_DIRTY_NODES); 66e05df3b1SJaegeuk Kim } 67e05df3b1SJaegeuk Kim ClearPageUptodate(page); 68e05df3b1SJaegeuk Kim } 69e05df3b1SJaegeuk Kim 70e05df3b1SJaegeuk Kim static struct page *get_current_nat_page(struct f2fs_sb_info *sbi, nid_t nid) 71e05df3b1SJaegeuk Kim { 72e05df3b1SJaegeuk Kim pgoff_t index = current_nat_addr(sbi, nid); 73e05df3b1SJaegeuk Kim return get_meta_page(sbi, index); 74e05df3b1SJaegeuk Kim } 75e05df3b1SJaegeuk Kim 76e05df3b1SJaegeuk Kim static struct page *get_next_nat_page(struct f2fs_sb_info *sbi, nid_t nid) 77e05df3b1SJaegeuk Kim { 78e05df3b1SJaegeuk Kim struct page *src_page; 79e05df3b1SJaegeuk Kim struct page *dst_page; 80e05df3b1SJaegeuk Kim pgoff_t src_off; 81e05df3b1SJaegeuk Kim pgoff_t dst_off; 82e05df3b1SJaegeuk Kim void *src_addr; 83e05df3b1SJaegeuk Kim void *dst_addr; 84e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 85e05df3b1SJaegeuk Kim 86e05df3b1SJaegeuk Kim src_off = current_nat_addr(sbi, nid); 87e05df3b1SJaegeuk Kim dst_off = next_nat_addr(sbi, src_off); 88e05df3b1SJaegeuk Kim 89e05df3b1SJaegeuk Kim /* get current nat block page with lock */ 90e05df3b1SJaegeuk Kim src_page = get_meta_page(sbi, src_off); 91e05df3b1SJaegeuk Kim 92e05df3b1SJaegeuk Kim /* Dirty src_page means that it is already the new target NAT page. */ 93e05df3b1SJaegeuk Kim if (PageDirty(src_page)) 94e05df3b1SJaegeuk Kim return src_page; 95e05df3b1SJaegeuk Kim 96e05df3b1SJaegeuk Kim dst_page = grab_meta_page(sbi, dst_off); 97e05df3b1SJaegeuk Kim 98e05df3b1SJaegeuk Kim src_addr = page_address(src_page); 99e05df3b1SJaegeuk Kim dst_addr = page_address(dst_page); 100e05df3b1SJaegeuk Kim memcpy(dst_addr, src_addr, PAGE_CACHE_SIZE); 101e05df3b1SJaegeuk Kim set_page_dirty(dst_page); 102e05df3b1SJaegeuk Kim f2fs_put_page(src_page, 1); 103e05df3b1SJaegeuk Kim 104e05df3b1SJaegeuk Kim set_to_next_nat(nm_i, nid); 105e05df3b1SJaegeuk Kim 106e05df3b1SJaegeuk Kim return dst_page; 107e05df3b1SJaegeuk Kim } 108e05df3b1SJaegeuk Kim 109e05df3b1SJaegeuk Kim static struct nat_entry *__lookup_nat_cache(struct f2fs_nm_info *nm_i, nid_t n) 110e05df3b1SJaegeuk Kim { 111e05df3b1SJaegeuk Kim return radix_tree_lookup(&nm_i->nat_root, n); 112e05df3b1SJaegeuk Kim } 113e05df3b1SJaegeuk Kim 114e05df3b1SJaegeuk Kim static unsigned int __gang_lookup_nat_cache(struct f2fs_nm_info *nm_i, 115e05df3b1SJaegeuk Kim nid_t start, unsigned int nr, struct nat_entry **ep) 116e05df3b1SJaegeuk Kim { 117e05df3b1SJaegeuk Kim return radix_tree_gang_lookup(&nm_i->nat_root, (void **)ep, start, nr); 118e05df3b1SJaegeuk Kim } 119e05df3b1SJaegeuk Kim 120e05df3b1SJaegeuk Kim static void __del_from_nat_cache(struct f2fs_nm_info *nm_i, struct nat_entry *e) 121e05df3b1SJaegeuk Kim { 122e05df3b1SJaegeuk Kim list_del(&e->list); 123e05df3b1SJaegeuk Kim radix_tree_delete(&nm_i->nat_root, nat_get_nid(e)); 124e05df3b1SJaegeuk Kim nm_i->nat_cnt--; 125e05df3b1SJaegeuk Kim kmem_cache_free(nat_entry_slab, e); 126e05df3b1SJaegeuk Kim } 127e05df3b1SJaegeuk Kim 128e05df3b1SJaegeuk Kim int is_checkpointed_node(struct f2fs_sb_info *sbi, nid_t nid) 129e05df3b1SJaegeuk Kim { 130e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 131e05df3b1SJaegeuk Kim struct nat_entry *e; 132e05df3b1SJaegeuk Kim int is_cp = 1; 133e05df3b1SJaegeuk Kim 134e05df3b1SJaegeuk Kim read_lock(&nm_i->nat_tree_lock); 135e05df3b1SJaegeuk Kim e = __lookup_nat_cache(nm_i, nid); 136e05df3b1SJaegeuk Kim if (e && !e->checkpointed) 137e05df3b1SJaegeuk Kim is_cp = 0; 138e05df3b1SJaegeuk Kim read_unlock(&nm_i->nat_tree_lock); 139e05df3b1SJaegeuk Kim return is_cp; 140e05df3b1SJaegeuk Kim } 141e05df3b1SJaegeuk Kim 142479f40c4SJaegeuk Kim bool fsync_mark_done(struct f2fs_sb_info *sbi, nid_t nid) 143479f40c4SJaegeuk Kim { 144479f40c4SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 145479f40c4SJaegeuk Kim struct nat_entry *e; 146479f40c4SJaegeuk Kim bool fsync_done = false; 147479f40c4SJaegeuk Kim 148479f40c4SJaegeuk Kim read_lock(&nm_i->nat_tree_lock); 149479f40c4SJaegeuk Kim e = __lookup_nat_cache(nm_i, nid); 150479f40c4SJaegeuk Kim if (e) 151479f40c4SJaegeuk Kim fsync_done = e->fsync_done; 152479f40c4SJaegeuk Kim read_unlock(&nm_i->nat_tree_lock); 153479f40c4SJaegeuk Kim return fsync_done; 154479f40c4SJaegeuk Kim } 155479f40c4SJaegeuk Kim 156b6fe5873SJaegeuk Kim void fsync_mark_clear(struct f2fs_sb_info *sbi, nid_t nid) 157b6fe5873SJaegeuk Kim { 158b6fe5873SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 159b6fe5873SJaegeuk Kim struct nat_entry *e; 160b6fe5873SJaegeuk Kim 161b6fe5873SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 162b6fe5873SJaegeuk Kim e = __lookup_nat_cache(nm_i, nid); 163b6fe5873SJaegeuk Kim if (e) 164b6fe5873SJaegeuk Kim e->fsync_done = false; 165b6fe5873SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 166b6fe5873SJaegeuk Kim } 167b6fe5873SJaegeuk Kim 168e05df3b1SJaegeuk Kim static struct nat_entry *grab_nat_entry(struct f2fs_nm_info *nm_i, nid_t nid) 169e05df3b1SJaegeuk Kim { 170e05df3b1SJaegeuk Kim struct nat_entry *new; 171e05df3b1SJaegeuk Kim 172e05df3b1SJaegeuk Kim new = kmem_cache_alloc(nat_entry_slab, GFP_ATOMIC); 173e05df3b1SJaegeuk Kim if (!new) 174e05df3b1SJaegeuk Kim return NULL; 175e05df3b1SJaegeuk Kim if (radix_tree_insert(&nm_i->nat_root, nid, new)) { 176e05df3b1SJaegeuk Kim kmem_cache_free(nat_entry_slab, new); 177e05df3b1SJaegeuk Kim return NULL; 178e05df3b1SJaegeuk Kim } 179e05df3b1SJaegeuk Kim memset(new, 0, sizeof(struct nat_entry)); 180e05df3b1SJaegeuk Kim nat_set_nid(new, nid); 181fffc2a00SJaegeuk Kim new->checkpointed = true; 182e05df3b1SJaegeuk Kim list_add_tail(&new->list, &nm_i->nat_entries); 183e05df3b1SJaegeuk Kim nm_i->nat_cnt++; 184e05df3b1SJaegeuk Kim return new; 185e05df3b1SJaegeuk Kim } 186e05df3b1SJaegeuk Kim 187e05df3b1SJaegeuk Kim static void cache_nat_entry(struct f2fs_nm_info *nm_i, nid_t nid, 188e05df3b1SJaegeuk Kim struct f2fs_nat_entry *ne) 189e05df3b1SJaegeuk Kim { 190e05df3b1SJaegeuk Kim struct nat_entry *e; 191e05df3b1SJaegeuk Kim retry: 192e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 193e05df3b1SJaegeuk Kim e = __lookup_nat_cache(nm_i, nid); 194e05df3b1SJaegeuk Kim if (!e) { 195e05df3b1SJaegeuk Kim e = grab_nat_entry(nm_i, nid); 196e05df3b1SJaegeuk Kim if (!e) { 197e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 198e05df3b1SJaegeuk Kim goto retry; 199e05df3b1SJaegeuk Kim } 20094dac22eSChao Yu node_info_from_raw_nat(&e->ni, ne); 201e05df3b1SJaegeuk Kim } 202e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 203e05df3b1SJaegeuk Kim } 204e05df3b1SJaegeuk Kim 205e05df3b1SJaegeuk Kim static void set_node_addr(struct f2fs_sb_info *sbi, struct node_info *ni, 206479f40c4SJaegeuk Kim block_t new_blkaddr, bool fsync_done) 207e05df3b1SJaegeuk Kim { 208e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 209e05df3b1SJaegeuk Kim struct nat_entry *e; 210e05df3b1SJaegeuk Kim retry: 211e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 212e05df3b1SJaegeuk Kim e = __lookup_nat_cache(nm_i, ni->nid); 213e05df3b1SJaegeuk Kim if (!e) { 214e05df3b1SJaegeuk Kim e = grab_nat_entry(nm_i, ni->nid); 215e05df3b1SJaegeuk Kim if (!e) { 216e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 217e05df3b1SJaegeuk Kim goto retry; 218e05df3b1SJaegeuk Kim } 219e05df3b1SJaegeuk Kim e->ni = *ni; 2205d56b671SJaegeuk Kim f2fs_bug_on(ni->blk_addr == NEW_ADDR); 221e05df3b1SJaegeuk Kim } else if (new_blkaddr == NEW_ADDR) { 222e05df3b1SJaegeuk Kim /* 223e05df3b1SJaegeuk Kim * when nid is reallocated, 224e05df3b1SJaegeuk Kim * previous nat entry can be remained in nat cache. 225e05df3b1SJaegeuk Kim * So, reinitialize it with new information. 226e05df3b1SJaegeuk Kim */ 227e05df3b1SJaegeuk Kim e->ni = *ni; 2285d56b671SJaegeuk Kim f2fs_bug_on(ni->blk_addr != NULL_ADDR); 229e05df3b1SJaegeuk Kim } 230e05df3b1SJaegeuk Kim 231e05df3b1SJaegeuk Kim /* sanity check */ 2325d56b671SJaegeuk Kim f2fs_bug_on(nat_get_blkaddr(e) != ni->blk_addr); 2335d56b671SJaegeuk Kim f2fs_bug_on(nat_get_blkaddr(e) == NULL_ADDR && 234e05df3b1SJaegeuk Kim new_blkaddr == NULL_ADDR); 2355d56b671SJaegeuk Kim f2fs_bug_on(nat_get_blkaddr(e) == NEW_ADDR && 236e05df3b1SJaegeuk Kim new_blkaddr == NEW_ADDR); 2375d56b671SJaegeuk Kim f2fs_bug_on(nat_get_blkaddr(e) != NEW_ADDR && 238e05df3b1SJaegeuk Kim nat_get_blkaddr(e) != NULL_ADDR && 239e05df3b1SJaegeuk Kim new_blkaddr == NEW_ADDR); 240e05df3b1SJaegeuk Kim 241e05df3b1SJaegeuk Kim /* increament version no as node is removed */ 242e05df3b1SJaegeuk Kim if (nat_get_blkaddr(e) != NEW_ADDR && new_blkaddr == NULL_ADDR) { 243e05df3b1SJaegeuk Kim unsigned char version = nat_get_version(e); 244e05df3b1SJaegeuk Kim nat_set_version(e, inc_node_version(version)); 245e05df3b1SJaegeuk Kim } 246e05df3b1SJaegeuk Kim 247e05df3b1SJaegeuk Kim /* change address */ 248e05df3b1SJaegeuk Kim nat_set_blkaddr(e, new_blkaddr); 249e05df3b1SJaegeuk Kim __set_nat_cache_dirty(nm_i, e); 250479f40c4SJaegeuk Kim 251479f40c4SJaegeuk Kim /* update fsync_mark if its inode nat entry is still alive */ 252479f40c4SJaegeuk Kim e = __lookup_nat_cache(nm_i, ni->ino); 253479f40c4SJaegeuk Kim if (e) 254479f40c4SJaegeuk Kim e->fsync_done = fsync_done; 255e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 256e05df3b1SJaegeuk Kim } 257e05df3b1SJaegeuk Kim 2584660f9c0SJaegeuk Kim int try_to_free_nats(struct f2fs_sb_info *sbi, int nr_shrink) 259e05df3b1SJaegeuk Kim { 260e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 261e05df3b1SJaegeuk Kim 2626fb03f3aSJaegeuk Kim if (available_free_memory(sbi, NAT_ENTRIES)) 263e05df3b1SJaegeuk Kim return 0; 264e05df3b1SJaegeuk Kim 265e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 266e05df3b1SJaegeuk Kim while (nr_shrink && !list_empty(&nm_i->nat_entries)) { 267e05df3b1SJaegeuk Kim struct nat_entry *ne; 268e05df3b1SJaegeuk Kim ne = list_first_entry(&nm_i->nat_entries, 269e05df3b1SJaegeuk Kim struct nat_entry, list); 270e05df3b1SJaegeuk Kim __del_from_nat_cache(nm_i, ne); 271e05df3b1SJaegeuk Kim nr_shrink--; 272e05df3b1SJaegeuk Kim } 273e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 274e05df3b1SJaegeuk Kim return nr_shrink; 275e05df3b1SJaegeuk Kim } 276e05df3b1SJaegeuk Kim 2770a8165d7SJaegeuk Kim /* 278e05df3b1SJaegeuk Kim * This function returns always success 279e05df3b1SJaegeuk Kim */ 280e05df3b1SJaegeuk Kim void get_node_info(struct f2fs_sb_info *sbi, nid_t nid, struct node_info *ni) 281e05df3b1SJaegeuk Kim { 282e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 283e05df3b1SJaegeuk Kim struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); 284e05df3b1SJaegeuk Kim struct f2fs_summary_block *sum = curseg->sum_blk; 285e05df3b1SJaegeuk Kim nid_t start_nid = START_NID(nid); 286e05df3b1SJaegeuk Kim struct f2fs_nat_block *nat_blk; 287e05df3b1SJaegeuk Kim struct page *page = NULL; 288e05df3b1SJaegeuk Kim struct f2fs_nat_entry ne; 289e05df3b1SJaegeuk Kim struct nat_entry *e; 290e05df3b1SJaegeuk Kim int i; 291e05df3b1SJaegeuk Kim 292be4124f8SNamjae Jeon memset(&ne, 0, sizeof(struct f2fs_nat_entry)); 293e05df3b1SJaegeuk Kim ni->nid = nid; 294e05df3b1SJaegeuk Kim 295e05df3b1SJaegeuk Kim /* Check nat cache */ 296e05df3b1SJaegeuk Kim read_lock(&nm_i->nat_tree_lock); 297e05df3b1SJaegeuk Kim e = __lookup_nat_cache(nm_i, nid); 298e05df3b1SJaegeuk Kim if (e) { 299e05df3b1SJaegeuk Kim ni->ino = nat_get_ino(e); 300e05df3b1SJaegeuk Kim ni->blk_addr = nat_get_blkaddr(e); 301e05df3b1SJaegeuk Kim ni->version = nat_get_version(e); 302e05df3b1SJaegeuk Kim } 303e05df3b1SJaegeuk Kim read_unlock(&nm_i->nat_tree_lock); 304e05df3b1SJaegeuk Kim if (e) 305e05df3b1SJaegeuk Kim return; 306e05df3b1SJaegeuk Kim 307e05df3b1SJaegeuk Kim /* Check current segment summary */ 308e05df3b1SJaegeuk Kim mutex_lock(&curseg->curseg_mutex); 309e05df3b1SJaegeuk Kim i = lookup_journal_in_cursum(sum, NAT_JOURNAL, nid, 0); 310e05df3b1SJaegeuk Kim if (i >= 0) { 311e05df3b1SJaegeuk Kim ne = nat_in_journal(sum, i); 312e05df3b1SJaegeuk Kim node_info_from_raw_nat(ni, &ne); 313e05df3b1SJaegeuk Kim } 314e05df3b1SJaegeuk Kim mutex_unlock(&curseg->curseg_mutex); 315e05df3b1SJaegeuk Kim if (i >= 0) 316e05df3b1SJaegeuk Kim goto cache; 317e05df3b1SJaegeuk Kim 318e05df3b1SJaegeuk Kim /* Fill node_info from nat page */ 319e05df3b1SJaegeuk Kim page = get_current_nat_page(sbi, start_nid); 320e05df3b1SJaegeuk Kim nat_blk = (struct f2fs_nat_block *)page_address(page); 321e05df3b1SJaegeuk Kim ne = nat_blk->entries[nid - start_nid]; 322e05df3b1SJaegeuk Kim node_info_from_raw_nat(ni, &ne); 323e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 324e05df3b1SJaegeuk Kim cache: 325e05df3b1SJaegeuk Kim /* cache nat entry */ 326e05df3b1SJaegeuk Kim cache_nat_entry(NM_I(sbi), nid, &ne); 327e05df3b1SJaegeuk Kim } 328e05df3b1SJaegeuk Kim 3290a8165d7SJaegeuk Kim /* 330e05df3b1SJaegeuk Kim * The maximum depth is four. 331e05df3b1SJaegeuk Kim * Offset[0] will have raw inode offset. 332e05df3b1SJaegeuk Kim */ 333de93653fSJaegeuk Kim static int get_node_path(struct f2fs_inode_info *fi, long block, 334de93653fSJaegeuk Kim int offset[4], unsigned int noffset[4]) 335e05df3b1SJaegeuk Kim { 336de93653fSJaegeuk Kim const long direct_index = ADDRS_PER_INODE(fi); 337e05df3b1SJaegeuk Kim const long direct_blks = ADDRS_PER_BLOCK; 338e05df3b1SJaegeuk Kim const long dptrs_per_blk = NIDS_PER_BLOCK; 339e05df3b1SJaegeuk Kim const long indirect_blks = ADDRS_PER_BLOCK * NIDS_PER_BLOCK; 340e05df3b1SJaegeuk Kim const long dindirect_blks = indirect_blks * NIDS_PER_BLOCK; 341e05df3b1SJaegeuk Kim int n = 0; 342e05df3b1SJaegeuk Kim int level = 0; 343e05df3b1SJaegeuk Kim 344e05df3b1SJaegeuk Kim noffset[0] = 0; 345e05df3b1SJaegeuk Kim 346e05df3b1SJaegeuk Kim if (block < direct_index) { 34725c0a6e5SNamjae Jeon offset[n] = block; 348e05df3b1SJaegeuk Kim goto got; 349e05df3b1SJaegeuk Kim } 350e05df3b1SJaegeuk Kim block -= direct_index; 351e05df3b1SJaegeuk Kim if (block < direct_blks) { 352e05df3b1SJaegeuk Kim offset[n++] = NODE_DIR1_BLOCK; 353e05df3b1SJaegeuk Kim noffset[n] = 1; 35425c0a6e5SNamjae Jeon offset[n] = block; 355e05df3b1SJaegeuk Kim level = 1; 356e05df3b1SJaegeuk Kim goto got; 357e05df3b1SJaegeuk Kim } 358e05df3b1SJaegeuk Kim block -= direct_blks; 359e05df3b1SJaegeuk Kim if (block < direct_blks) { 360e05df3b1SJaegeuk Kim offset[n++] = NODE_DIR2_BLOCK; 361e05df3b1SJaegeuk Kim noffset[n] = 2; 36225c0a6e5SNamjae Jeon offset[n] = block; 363e05df3b1SJaegeuk Kim level = 1; 364e05df3b1SJaegeuk Kim goto got; 365e05df3b1SJaegeuk Kim } 366e05df3b1SJaegeuk Kim block -= direct_blks; 367e05df3b1SJaegeuk Kim if (block < indirect_blks) { 368e05df3b1SJaegeuk Kim offset[n++] = NODE_IND1_BLOCK; 369e05df3b1SJaegeuk Kim noffset[n] = 3; 370e05df3b1SJaegeuk Kim offset[n++] = block / direct_blks; 371e05df3b1SJaegeuk Kim noffset[n] = 4 + offset[n - 1]; 37225c0a6e5SNamjae Jeon offset[n] = block % direct_blks; 373e05df3b1SJaegeuk Kim level = 2; 374e05df3b1SJaegeuk Kim goto got; 375e05df3b1SJaegeuk Kim } 376e05df3b1SJaegeuk Kim block -= indirect_blks; 377e05df3b1SJaegeuk Kim if (block < indirect_blks) { 378e05df3b1SJaegeuk Kim offset[n++] = NODE_IND2_BLOCK; 379e05df3b1SJaegeuk Kim noffset[n] = 4 + dptrs_per_blk; 380e05df3b1SJaegeuk Kim offset[n++] = block / direct_blks; 381e05df3b1SJaegeuk Kim noffset[n] = 5 + dptrs_per_blk + offset[n - 1]; 38225c0a6e5SNamjae Jeon offset[n] = block % direct_blks; 383e05df3b1SJaegeuk Kim level = 2; 384e05df3b1SJaegeuk Kim goto got; 385e05df3b1SJaegeuk Kim } 386e05df3b1SJaegeuk Kim block -= indirect_blks; 387e05df3b1SJaegeuk Kim if (block < dindirect_blks) { 388e05df3b1SJaegeuk Kim offset[n++] = NODE_DIND_BLOCK; 389e05df3b1SJaegeuk Kim noffset[n] = 5 + (dptrs_per_blk * 2); 390e05df3b1SJaegeuk Kim offset[n++] = block / indirect_blks; 391e05df3b1SJaegeuk Kim noffset[n] = 6 + (dptrs_per_blk * 2) + 392e05df3b1SJaegeuk Kim offset[n - 1] * (dptrs_per_blk + 1); 393e05df3b1SJaegeuk Kim offset[n++] = (block / direct_blks) % dptrs_per_blk; 394e05df3b1SJaegeuk Kim noffset[n] = 7 + (dptrs_per_blk * 2) + 395e05df3b1SJaegeuk Kim offset[n - 2] * (dptrs_per_blk + 1) + 396e05df3b1SJaegeuk Kim offset[n - 1]; 39725c0a6e5SNamjae Jeon offset[n] = block % direct_blks; 398e05df3b1SJaegeuk Kim level = 3; 399e05df3b1SJaegeuk Kim goto got; 400e05df3b1SJaegeuk Kim } else { 401e05df3b1SJaegeuk Kim BUG(); 402e05df3b1SJaegeuk Kim } 403e05df3b1SJaegeuk Kim got: 404e05df3b1SJaegeuk Kim return level; 405e05df3b1SJaegeuk Kim } 406e05df3b1SJaegeuk Kim 407e05df3b1SJaegeuk Kim /* 408e05df3b1SJaegeuk Kim * Caller should call f2fs_put_dnode(dn). 4094f4124d0SChao Yu * Also, it should grab and release a rwsem by calling f2fs_lock_op() and 4104f4124d0SChao Yu * f2fs_unlock_op() only if ro is not set RDONLY_NODE. 41139936837SJaegeuk Kim * In the case of RDONLY_NODE, we don't need to care about mutex. 412e05df3b1SJaegeuk Kim */ 413266e97a8SJaegeuk Kim int get_dnode_of_data(struct dnode_of_data *dn, pgoff_t index, int mode) 414e05df3b1SJaegeuk Kim { 415e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); 416e05df3b1SJaegeuk Kim struct page *npage[4]; 417e05df3b1SJaegeuk Kim struct page *parent; 418e05df3b1SJaegeuk Kim int offset[4]; 419e05df3b1SJaegeuk Kim unsigned int noffset[4]; 420e05df3b1SJaegeuk Kim nid_t nids[4]; 421e05df3b1SJaegeuk Kim int level, i; 422e05df3b1SJaegeuk Kim int err = 0; 423e05df3b1SJaegeuk Kim 424de93653fSJaegeuk Kim level = get_node_path(F2FS_I(dn->inode), index, offset, noffset); 425e05df3b1SJaegeuk Kim 426e05df3b1SJaegeuk Kim nids[0] = dn->inode->i_ino; 4271646cfacSJaegeuk Kim npage[0] = dn->inode_page; 4281646cfacSJaegeuk Kim 4291646cfacSJaegeuk Kim if (!npage[0]) { 430e05df3b1SJaegeuk Kim npage[0] = get_node_page(sbi, nids[0]); 431e05df3b1SJaegeuk Kim if (IS_ERR(npage[0])) 432e05df3b1SJaegeuk Kim return PTR_ERR(npage[0]); 4331646cfacSJaegeuk Kim } 434e05df3b1SJaegeuk Kim parent = npage[0]; 43552c2db3fSChangman Lee if (level != 0) 436e05df3b1SJaegeuk Kim nids[1] = get_nid(parent, offset[0], true); 437e05df3b1SJaegeuk Kim dn->inode_page = npage[0]; 438e05df3b1SJaegeuk Kim dn->inode_page_locked = true; 439e05df3b1SJaegeuk Kim 440e05df3b1SJaegeuk Kim /* get indirect or direct nodes */ 441e05df3b1SJaegeuk Kim for (i = 1; i <= level; i++) { 442e05df3b1SJaegeuk Kim bool done = false; 443e05df3b1SJaegeuk Kim 444266e97a8SJaegeuk Kim if (!nids[i] && mode == ALLOC_NODE) { 445e05df3b1SJaegeuk Kim /* alloc new node */ 446e05df3b1SJaegeuk Kim if (!alloc_nid(sbi, &(nids[i]))) { 447e05df3b1SJaegeuk Kim err = -ENOSPC; 448e05df3b1SJaegeuk Kim goto release_pages; 449e05df3b1SJaegeuk Kim } 450e05df3b1SJaegeuk Kim 451e05df3b1SJaegeuk Kim dn->nid = nids[i]; 4528ae8f162SJaegeuk Kim npage[i] = new_node_page(dn, noffset[i], NULL); 453e05df3b1SJaegeuk Kim if (IS_ERR(npage[i])) { 454e05df3b1SJaegeuk Kim alloc_nid_failed(sbi, nids[i]); 455e05df3b1SJaegeuk Kim err = PTR_ERR(npage[i]); 456e05df3b1SJaegeuk Kim goto release_pages; 457e05df3b1SJaegeuk Kim } 458e05df3b1SJaegeuk Kim 459e05df3b1SJaegeuk Kim set_nid(parent, offset[i - 1], nids[i], i == 1); 460e05df3b1SJaegeuk Kim alloc_nid_done(sbi, nids[i]); 461e05df3b1SJaegeuk Kim done = true; 462266e97a8SJaegeuk Kim } else if (mode == LOOKUP_NODE_RA && i == level && level > 1) { 463e05df3b1SJaegeuk Kim npage[i] = get_node_page_ra(parent, offset[i - 1]); 464e05df3b1SJaegeuk Kim if (IS_ERR(npage[i])) { 465e05df3b1SJaegeuk Kim err = PTR_ERR(npage[i]); 466e05df3b1SJaegeuk Kim goto release_pages; 467e05df3b1SJaegeuk Kim } 468e05df3b1SJaegeuk Kim done = true; 469e05df3b1SJaegeuk Kim } 470e05df3b1SJaegeuk Kim if (i == 1) { 471e05df3b1SJaegeuk Kim dn->inode_page_locked = false; 472e05df3b1SJaegeuk Kim unlock_page(parent); 473e05df3b1SJaegeuk Kim } else { 474e05df3b1SJaegeuk Kim f2fs_put_page(parent, 1); 475e05df3b1SJaegeuk Kim } 476e05df3b1SJaegeuk Kim 477e05df3b1SJaegeuk Kim if (!done) { 478e05df3b1SJaegeuk Kim npage[i] = get_node_page(sbi, nids[i]); 479e05df3b1SJaegeuk Kim if (IS_ERR(npage[i])) { 480e05df3b1SJaegeuk Kim err = PTR_ERR(npage[i]); 481e05df3b1SJaegeuk Kim f2fs_put_page(npage[0], 0); 482e05df3b1SJaegeuk Kim goto release_out; 483e05df3b1SJaegeuk Kim } 484e05df3b1SJaegeuk Kim } 485e05df3b1SJaegeuk Kim if (i < level) { 486e05df3b1SJaegeuk Kim parent = npage[i]; 487e05df3b1SJaegeuk Kim nids[i + 1] = get_nid(parent, offset[i], false); 488e05df3b1SJaegeuk Kim } 489e05df3b1SJaegeuk Kim } 490e05df3b1SJaegeuk Kim dn->nid = nids[level]; 491e05df3b1SJaegeuk Kim dn->ofs_in_node = offset[level]; 492e05df3b1SJaegeuk Kim dn->node_page = npage[level]; 493e05df3b1SJaegeuk Kim dn->data_blkaddr = datablock_addr(dn->node_page, dn->ofs_in_node); 494e05df3b1SJaegeuk Kim return 0; 495e05df3b1SJaegeuk Kim 496e05df3b1SJaegeuk Kim release_pages: 497e05df3b1SJaegeuk Kim f2fs_put_page(parent, 1); 498e05df3b1SJaegeuk Kim if (i > 1) 499e05df3b1SJaegeuk Kim f2fs_put_page(npage[0], 0); 500e05df3b1SJaegeuk Kim release_out: 501e05df3b1SJaegeuk Kim dn->inode_page = NULL; 502e05df3b1SJaegeuk Kim dn->node_page = NULL; 503e05df3b1SJaegeuk Kim return err; 504e05df3b1SJaegeuk Kim } 505e05df3b1SJaegeuk Kim 506e05df3b1SJaegeuk Kim static void truncate_node(struct dnode_of_data *dn) 507e05df3b1SJaegeuk Kim { 508e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); 509e05df3b1SJaegeuk Kim struct node_info ni; 510e05df3b1SJaegeuk Kim 511e05df3b1SJaegeuk Kim get_node_info(sbi, dn->nid, &ni); 51271e9fec5SJaegeuk Kim if (dn->inode->i_blocks == 0) { 5135d56b671SJaegeuk Kim f2fs_bug_on(ni.blk_addr != NULL_ADDR); 51471e9fec5SJaegeuk Kim goto invalidate; 51571e9fec5SJaegeuk Kim } 5165d56b671SJaegeuk Kim f2fs_bug_on(ni.blk_addr == NULL_ADDR); 517e05df3b1SJaegeuk Kim 518e05df3b1SJaegeuk Kim /* Deallocate node address */ 51971e9fec5SJaegeuk Kim invalidate_blocks(sbi, ni.blk_addr); 520ef86d709SGu Zheng dec_valid_node_count(sbi, dn->inode); 521479f40c4SJaegeuk Kim set_node_addr(sbi, &ni, NULL_ADDR, false); 522e05df3b1SJaegeuk Kim 523e05df3b1SJaegeuk Kim if (dn->nid == dn->inode->i_ino) { 524e05df3b1SJaegeuk Kim remove_orphan_inode(sbi, dn->nid); 525e05df3b1SJaegeuk Kim dec_valid_inode_count(sbi); 526e05df3b1SJaegeuk Kim } else { 527e05df3b1SJaegeuk Kim sync_inode_page(dn); 528e05df3b1SJaegeuk Kim } 52971e9fec5SJaegeuk Kim invalidate: 530e05df3b1SJaegeuk Kim clear_node_page_dirty(dn->node_page); 531e05df3b1SJaegeuk Kim F2FS_SET_SB_DIRT(sbi); 532e05df3b1SJaegeuk Kim 533e05df3b1SJaegeuk Kim f2fs_put_page(dn->node_page, 1); 534bf39c00aSJaegeuk Kim 535bf39c00aSJaegeuk Kim invalidate_mapping_pages(NODE_MAPPING(sbi), 536bf39c00aSJaegeuk Kim dn->node_page->index, dn->node_page->index); 537bf39c00aSJaegeuk Kim 538e05df3b1SJaegeuk Kim dn->node_page = NULL; 53951dd6249SNamjae Jeon trace_f2fs_truncate_node(dn->inode, dn->nid, ni.blk_addr); 540e05df3b1SJaegeuk Kim } 541e05df3b1SJaegeuk Kim 542e05df3b1SJaegeuk Kim static int truncate_dnode(struct dnode_of_data *dn) 543e05df3b1SJaegeuk Kim { 544e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); 545e05df3b1SJaegeuk Kim struct page *page; 546e05df3b1SJaegeuk Kim 547e05df3b1SJaegeuk Kim if (dn->nid == 0) 548e05df3b1SJaegeuk Kim return 1; 549e05df3b1SJaegeuk Kim 550e05df3b1SJaegeuk Kim /* get direct node */ 551e05df3b1SJaegeuk Kim page = get_node_page(sbi, dn->nid); 552e05df3b1SJaegeuk Kim if (IS_ERR(page) && PTR_ERR(page) == -ENOENT) 553e05df3b1SJaegeuk Kim return 1; 554e05df3b1SJaegeuk Kim else if (IS_ERR(page)) 555e05df3b1SJaegeuk Kim return PTR_ERR(page); 556e05df3b1SJaegeuk Kim 557e05df3b1SJaegeuk Kim /* Make dnode_of_data for parameter */ 558e05df3b1SJaegeuk Kim dn->node_page = page; 559e05df3b1SJaegeuk Kim dn->ofs_in_node = 0; 560e05df3b1SJaegeuk Kim truncate_data_blocks(dn); 561e05df3b1SJaegeuk Kim truncate_node(dn); 562e05df3b1SJaegeuk Kim return 1; 563e05df3b1SJaegeuk Kim } 564e05df3b1SJaegeuk Kim 565e05df3b1SJaegeuk Kim static int truncate_nodes(struct dnode_of_data *dn, unsigned int nofs, 566e05df3b1SJaegeuk Kim int ofs, int depth) 567e05df3b1SJaegeuk Kim { 568e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); 569e05df3b1SJaegeuk Kim struct dnode_of_data rdn = *dn; 570e05df3b1SJaegeuk Kim struct page *page; 571e05df3b1SJaegeuk Kim struct f2fs_node *rn; 572e05df3b1SJaegeuk Kim nid_t child_nid; 573e05df3b1SJaegeuk Kim unsigned int child_nofs; 574e05df3b1SJaegeuk Kim int freed = 0; 575e05df3b1SJaegeuk Kim int i, ret; 576e05df3b1SJaegeuk Kim 577e05df3b1SJaegeuk Kim if (dn->nid == 0) 578e05df3b1SJaegeuk Kim return NIDS_PER_BLOCK + 1; 579e05df3b1SJaegeuk Kim 58051dd6249SNamjae Jeon trace_f2fs_truncate_nodes_enter(dn->inode, dn->nid, dn->data_blkaddr); 58151dd6249SNamjae Jeon 582e05df3b1SJaegeuk Kim page = get_node_page(sbi, dn->nid); 58351dd6249SNamjae Jeon if (IS_ERR(page)) { 58451dd6249SNamjae Jeon trace_f2fs_truncate_nodes_exit(dn->inode, PTR_ERR(page)); 585e05df3b1SJaegeuk Kim return PTR_ERR(page); 58651dd6249SNamjae Jeon } 587e05df3b1SJaegeuk Kim 58845590710SGu Zheng rn = F2FS_NODE(page); 589e05df3b1SJaegeuk Kim if (depth < 3) { 590e05df3b1SJaegeuk Kim for (i = ofs; i < NIDS_PER_BLOCK; i++, freed++) { 591e05df3b1SJaegeuk Kim child_nid = le32_to_cpu(rn->in.nid[i]); 592e05df3b1SJaegeuk Kim if (child_nid == 0) 593e05df3b1SJaegeuk Kim continue; 594e05df3b1SJaegeuk Kim rdn.nid = child_nid; 595e05df3b1SJaegeuk Kim ret = truncate_dnode(&rdn); 596e05df3b1SJaegeuk Kim if (ret < 0) 597e05df3b1SJaegeuk Kim goto out_err; 598e05df3b1SJaegeuk Kim set_nid(page, i, 0, false); 599e05df3b1SJaegeuk Kim } 600e05df3b1SJaegeuk Kim } else { 601e05df3b1SJaegeuk Kim child_nofs = nofs + ofs * (NIDS_PER_BLOCK + 1) + 1; 602e05df3b1SJaegeuk Kim for (i = ofs; i < NIDS_PER_BLOCK; i++) { 603e05df3b1SJaegeuk Kim child_nid = le32_to_cpu(rn->in.nid[i]); 604e05df3b1SJaegeuk Kim if (child_nid == 0) { 605e05df3b1SJaegeuk Kim child_nofs += NIDS_PER_BLOCK + 1; 606e05df3b1SJaegeuk Kim continue; 607e05df3b1SJaegeuk Kim } 608e05df3b1SJaegeuk Kim rdn.nid = child_nid; 609e05df3b1SJaegeuk Kim ret = truncate_nodes(&rdn, child_nofs, 0, depth - 1); 610e05df3b1SJaegeuk Kim if (ret == (NIDS_PER_BLOCK + 1)) { 611e05df3b1SJaegeuk Kim set_nid(page, i, 0, false); 612e05df3b1SJaegeuk Kim child_nofs += ret; 613e05df3b1SJaegeuk Kim } else if (ret < 0 && ret != -ENOENT) { 614e05df3b1SJaegeuk Kim goto out_err; 615e05df3b1SJaegeuk Kim } 616e05df3b1SJaegeuk Kim } 617e05df3b1SJaegeuk Kim freed = child_nofs; 618e05df3b1SJaegeuk Kim } 619e05df3b1SJaegeuk Kim 620e05df3b1SJaegeuk Kim if (!ofs) { 621e05df3b1SJaegeuk Kim /* remove current indirect node */ 622e05df3b1SJaegeuk Kim dn->node_page = page; 623e05df3b1SJaegeuk Kim truncate_node(dn); 624e05df3b1SJaegeuk Kim freed++; 625e05df3b1SJaegeuk Kim } else { 626e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 627e05df3b1SJaegeuk Kim } 62851dd6249SNamjae Jeon trace_f2fs_truncate_nodes_exit(dn->inode, freed); 629e05df3b1SJaegeuk Kim return freed; 630e05df3b1SJaegeuk Kim 631e05df3b1SJaegeuk Kim out_err: 632e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 63351dd6249SNamjae Jeon trace_f2fs_truncate_nodes_exit(dn->inode, ret); 634e05df3b1SJaegeuk Kim return ret; 635e05df3b1SJaegeuk Kim } 636e05df3b1SJaegeuk Kim 637e05df3b1SJaegeuk Kim static int truncate_partial_nodes(struct dnode_of_data *dn, 638e05df3b1SJaegeuk Kim struct f2fs_inode *ri, int *offset, int depth) 639e05df3b1SJaegeuk Kim { 640e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); 641e05df3b1SJaegeuk Kim struct page *pages[2]; 642e05df3b1SJaegeuk Kim nid_t nid[3]; 643e05df3b1SJaegeuk Kim nid_t child_nid; 644e05df3b1SJaegeuk Kim int err = 0; 645e05df3b1SJaegeuk Kim int i; 646e05df3b1SJaegeuk Kim int idx = depth - 2; 647e05df3b1SJaegeuk Kim 648e05df3b1SJaegeuk Kim nid[0] = le32_to_cpu(ri->i_nid[offset[0] - NODE_DIR1_BLOCK]); 649e05df3b1SJaegeuk Kim if (!nid[0]) 650e05df3b1SJaegeuk Kim return 0; 651e05df3b1SJaegeuk Kim 652e05df3b1SJaegeuk Kim /* get indirect nodes in the path */ 653a225dca3Sshifei10.ge for (i = 0; i < idx + 1; i++) { 654e05df3b1SJaegeuk Kim /* refernece count'll be increased */ 655e05df3b1SJaegeuk Kim pages[i] = get_node_page(sbi, nid[i]); 656e05df3b1SJaegeuk Kim if (IS_ERR(pages[i])) { 657e05df3b1SJaegeuk Kim err = PTR_ERR(pages[i]); 658a225dca3Sshifei10.ge idx = i - 1; 659e05df3b1SJaegeuk Kim goto fail; 660e05df3b1SJaegeuk Kim } 661e05df3b1SJaegeuk Kim nid[i + 1] = get_nid(pages[i], offset[i + 1], false); 662e05df3b1SJaegeuk Kim } 663e05df3b1SJaegeuk Kim 664e05df3b1SJaegeuk Kim /* free direct nodes linked to a partial indirect node */ 665a225dca3Sshifei10.ge for (i = offset[idx + 1]; i < NIDS_PER_BLOCK; i++) { 666e05df3b1SJaegeuk Kim child_nid = get_nid(pages[idx], i, false); 667e05df3b1SJaegeuk Kim if (!child_nid) 668e05df3b1SJaegeuk Kim continue; 669e05df3b1SJaegeuk Kim dn->nid = child_nid; 670e05df3b1SJaegeuk Kim err = truncate_dnode(dn); 671e05df3b1SJaegeuk Kim if (err < 0) 672e05df3b1SJaegeuk Kim goto fail; 673e05df3b1SJaegeuk Kim set_nid(pages[idx], i, 0, false); 674e05df3b1SJaegeuk Kim } 675e05df3b1SJaegeuk Kim 676a225dca3Sshifei10.ge if (offset[idx + 1] == 0) { 677e05df3b1SJaegeuk Kim dn->node_page = pages[idx]; 678e05df3b1SJaegeuk Kim dn->nid = nid[idx]; 679e05df3b1SJaegeuk Kim truncate_node(dn); 680e05df3b1SJaegeuk Kim } else { 681e05df3b1SJaegeuk Kim f2fs_put_page(pages[idx], 1); 682e05df3b1SJaegeuk Kim } 683e05df3b1SJaegeuk Kim offset[idx]++; 684a225dca3Sshifei10.ge offset[idx + 1] = 0; 685a225dca3Sshifei10.ge idx--; 686e05df3b1SJaegeuk Kim fail: 687a225dca3Sshifei10.ge for (i = idx; i >= 0; i--) 688e05df3b1SJaegeuk Kim f2fs_put_page(pages[i], 1); 68951dd6249SNamjae Jeon 69051dd6249SNamjae Jeon trace_f2fs_truncate_partial_nodes(dn->inode, nid, depth, err); 69151dd6249SNamjae Jeon 692e05df3b1SJaegeuk Kim return err; 693e05df3b1SJaegeuk Kim } 694e05df3b1SJaegeuk Kim 6950a8165d7SJaegeuk Kim /* 696e05df3b1SJaegeuk Kim * All the block addresses of data and nodes should be nullified. 697e05df3b1SJaegeuk Kim */ 698e05df3b1SJaegeuk Kim int truncate_inode_blocks(struct inode *inode, pgoff_t from) 699e05df3b1SJaegeuk Kim { 700e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); 701e05df3b1SJaegeuk Kim int err = 0, cont = 1; 702e05df3b1SJaegeuk Kim int level, offset[4], noffset[4]; 7037dd690c8SJaegeuk Kim unsigned int nofs = 0; 70458bfaf44SJaegeuk Kim struct f2fs_inode *ri; 705e05df3b1SJaegeuk Kim struct dnode_of_data dn; 706e05df3b1SJaegeuk Kim struct page *page; 707e05df3b1SJaegeuk Kim 70851dd6249SNamjae Jeon trace_f2fs_truncate_inode_blocks_enter(inode, from); 70951dd6249SNamjae Jeon 710de93653fSJaegeuk Kim level = get_node_path(F2FS_I(inode), from, offset, noffset); 711afcb7ca0SJaegeuk Kim restart: 712e05df3b1SJaegeuk Kim page = get_node_page(sbi, inode->i_ino); 71351dd6249SNamjae Jeon if (IS_ERR(page)) { 71451dd6249SNamjae Jeon trace_f2fs_truncate_inode_blocks_exit(inode, PTR_ERR(page)); 715e05df3b1SJaegeuk Kim return PTR_ERR(page); 71651dd6249SNamjae Jeon } 717e05df3b1SJaegeuk Kim 718e05df3b1SJaegeuk Kim set_new_dnode(&dn, inode, page, NULL, 0); 719e05df3b1SJaegeuk Kim unlock_page(page); 720e05df3b1SJaegeuk Kim 72158bfaf44SJaegeuk Kim ri = F2FS_INODE(page); 722e05df3b1SJaegeuk Kim switch (level) { 723e05df3b1SJaegeuk Kim case 0: 724e05df3b1SJaegeuk Kim case 1: 725e05df3b1SJaegeuk Kim nofs = noffset[1]; 726e05df3b1SJaegeuk Kim break; 727e05df3b1SJaegeuk Kim case 2: 728e05df3b1SJaegeuk Kim nofs = noffset[1]; 729e05df3b1SJaegeuk Kim if (!offset[level - 1]) 730e05df3b1SJaegeuk Kim goto skip_partial; 73158bfaf44SJaegeuk Kim err = truncate_partial_nodes(&dn, ri, offset, level); 732e05df3b1SJaegeuk Kim if (err < 0 && err != -ENOENT) 733e05df3b1SJaegeuk Kim goto fail; 734e05df3b1SJaegeuk Kim nofs += 1 + NIDS_PER_BLOCK; 735e05df3b1SJaegeuk Kim break; 736e05df3b1SJaegeuk Kim case 3: 737e05df3b1SJaegeuk Kim nofs = 5 + 2 * NIDS_PER_BLOCK; 738e05df3b1SJaegeuk Kim if (!offset[level - 1]) 739e05df3b1SJaegeuk Kim goto skip_partial; 74058bfaf44SJaegeuk Kim err = truncate_partial_nodes(&dn, ri, offset, level); 741e05df3b1SJaegeuk Kim if (err < 0 && err != -ENOENT) 742e05df3b1SJaegeuk Kim goto fail; 743e05df3b1SJaegeuk Kim break; 744e05df3b1SJaegeuk Kim default: 745e05df3b1SJaegeuk Kim BUG(); 746e05df3b1SJaegeuk Kim } 747e05df3b1SJaegeuk Kim 748e05df3b1SJaegeuk Kim skip_partial: 749e05df3b1SJaegeuk Kim while (cont) { 75058bfaf44SJaegeuk Kim dn.nid = le32_to_cpu(ri->i_nid[offset[0] - NODE_DIR1_BLOCK]); 751e05df3b1SJaegeuk Kim switch (offset[0]) { 752e05df3b1SJaegeuk Kim case NODE_DIR1_BLOCK: 753e05df3b1SJaegeuk Kim case NODE_DIR2_BLOCK: 754e05df3b1SJaegeuk Kim err = truncate_dnode(&dn); 755e05df3b1SJaegeuk Kim break; 756e05df3b1SJaegeuk Kim 757e05df3b1SJaegeuk Kim case NODE_IND1_BLOCK: 758e05df3b1SJaegeuk Kim case NODE_IND2_BLOCK: 759e05df3b1SJaegeuk Kim err = truncate_nodes(&dn, nofs, offset[1], 2); 760e05df3b1SJaegeuk Kim break; 761e05df3b1SJaegeuk Kim 762e05df3b1SJaegeuk Kim case NODE_DIND_BLOCK: 763e05df3b1SJaegeuk Kim err = truncate_nodes(&dn, nofs, offset[1], 3); 764e05df3b1SJaegeuk Kim cont = 0; 765e05df3b1SJaegeuk Kim break; 766e05df3b1SJaegeuk Kim 767e05df3b1SJaegeuk Kim default: 768e05df3b1SJaegeuk Kim BUG(); 769e05df3b1SJaegeuk Kim } 770e05df3b1SJaegeuk Kim if (err < 0 && err != -ENOENT) 771e05df3b1SJaegeuk Kim goto fail; 772e05df3b1SJaegeuk Kim if (offset[1] == 0 && 77358bfaf44SJaegeuk Kim ri->i_nid[offset[0] - NODE_DIR1_BLOCK]) { 774e05df3b1SJaegeuk Kim lock_page(page); 7754ef51a8fSJaegeuk Kim if (unlikely(page->mapping != NODE_MAPPING(sbi))) { 776afcb7ca0SJaegeuk Kim f2fs_put_page(page, 1); 777afcb7ca0SJaegeuk Kim goto restart; 778afcb7ca0SJaegeuk Kim } 7793cb5ad15SJaegeuk Kim f2fs_wait_on_page_writeback(page, NODE); 78058bfaf44SJaegeuk Kim ri->i_nid[offset[0] - NODE_DIR1_BLOCK] = 0; 781e05df3b1SJaegeuk Kim set_page_dirty(page); 782e05df3b1SJaegeuk Kim unlock_page(page); 783e05df3b1SJaegeuk Kim } 784e05df3b1SJaegeuk Kim offset[1] = 0; 785e05df3b1SJaegeuk Kim offset[0]++; 786e05df3b1SJaegeuk Kim nofs += err; 787e05df3b1SJaegeuk Kim } 788e05df3b1SJaegeuk Kim fail: 789e05df3b1SJaegeuk Kim f2fs_put_page(page, 0); 79051dd6249SNamjae Jeon trace_f2fs_truncate_inode_blocks_exit(inode, err); 791e05df3b1SJaegeuk Kim return err > 0 ? 0 : err; 792e05df3b1SJaegeuk Kim } 793e05df3b1SJaegeuk Kim 7944f16fb0fSJaegeuk Kim int truncate_xattr_node(struct inode *inode, struct page *page) 7954f16fb0fSJaegeuk Kim { 7964f16fb0fSJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); 7974f16fb0fSJaegeuk Kim nid_t nid = F2FS_I(inode)->i_xattr_nid; 7984f16fb0fSJaegeuk Kim struct dnode_of_data dn; 7994f16fb0fSJaegeuk Kim struct page *npage; 8004f16fb0fSJaegeuk Kim 8014f16fb0fSJaegeuk Kim if (!nid) 8024f16fb0fSJaegeuk Kim return 0; 8034f16fb0fSJaegeuk Kim 8044f16fb0fSJaegeuk Kim npage = get_node_page(sbi, nid); 8054f16fb0fSJaegeuk Kim if (IS_ERR(npage)) 8064f16fb0fSJaegeuk Kim return PTR_ERR(npage); 8074f16fb0fSJaegeuk Kim 8084f16fb0fSJaegeuk Kim F2FS_I(inode)->i_xattr_nid = 0; 80965985d93SJaegeuk Kim 81065985d93SJaegeuk Kim /* need to do checkpoint during fsync */ 81165985d93SJaegeuk Kim F2FS_I(inode)->xattr_ver = cur_cp_version(F2FS_CKPT(sbi)); 81265985d93SJaegeuk Kim 8134f16fb0fSJaegeuk Kim set_new_dnode(&dn, inode, page, npage, nid); 8144f16fb0fSJaegeuk Kim 8154f16fb0fSJaegeuk Kim if (page) 81601d2d1aaSChao Yu dn.inode_page_locked = true; 8174f16fb0fSJaegeuk Kim truncate_node(&dn); 8184f16fb0fSJaegeuk Kim return 0; 8194f16fb0fSJaegeuk Kim } 8204f16fb0fSJaegeuk Kim 82139936837SJaegeuk Kim /* 8224f4124d0SChao Yu * Caller should grab and release a rwsem by calling f2fs_lock_op() and 8234f4124d0SChao Yu * f2fs_unlock_op(). 82439936837SJaegeuk Kim */ 82558e674d6SGu Zheng void remove_inode_page(struct inode *inode) 826e05df3b1SJaegeuk Kim { 827e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); 828e05df3b1SJaegeuk Kim struct page *page; 829e05df3b1SJaegeuk Kim nid_t ino = inode->i_ino; 830e05df3b1SJaegeuk Kim struct dnode_of_data dn; 831e05df3b1SJaegeuk Kim 832e05df3b1SJaegeuk Kim page = get_node_page(sbi, ino); 83339936837SJaegeuk Kim if (IS_ERR(page)) 83458e674d6SGu Zheng return; 835e05df3b1SJaegeuk Kim 83658e674d6SGu Zheng if (truncate_xattr_node(inode, page)) { 8374f16fb0fSJaegeuk Kim f2fs_put_page(page, 1); 83858e674d6SGu Zheng return; 839e05df3b1SJaegeuk Kim } 84071e9fec5SJaegeuk Kim /* 0 is possible, after f2fs_new_inode() is failed */ 8415d56b671SJaegeuk Kim f2fs_bug_on(inode->i_blocks != 0 && inode->i_blocks != 1); 842e05df3b1SJaegeuk Kim set_new_dnode(&dn, inode, page, page, ino); 843e05df3b1SJaegeuk Kim truncate_node(&dn); 844e05df3b1SJaegeuk Kim } 845e05df3b1SJaegeuk Kim 84644a83ff6SJaegeuk Kim struct page *new_inode_page(struct inode *inode, const struct qstr *name) 847e05df3b1SJaegeuk Kim { 848e05df3b1SJaegeuk Kim struct dnode_of_data dn; 849e05df3b1SJaegeuk Kim 850e05df3b1SJaegeuk Kim /* allocate inode page for new inode */ 851e05df3b1SJaegeuk Kim set_new_dnode(&dn, inode, NULL, NULL, inode->i_ino); 85244a83ff6SJaegeuk Kim 85344a83ff6SJaegeuk Kim /* caller should f2fs_put_page(page, 1); */ 8548ae8f162SJaegeuk Kim return new_node_page(&dn, 0, NULL); 855e05df3b1SJaegeuk Kim } 856e05df3b1SJaegeuk Kim 8578ae8f162SJaegeuk Kim struct page *new_node_page(struct dnode_of_data *dn, 8588ae8f162SJaegeuk Kim unsigned int ofs, struct page *ipage) 859e05df3b1SJaegeuk Kim { 860e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); 861e05df3b1SJaegeuk Kim struct node_info old_ni, new_ni; 862e05df3b1SJaegeuk Kim struct page *page; 863e05df3b1SJaegeuk Kim int err; 864e05df3b1SJaegeuk Kim 8656bacf52fSJaegeuk Kim if (unlikely(is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC))) 866e05df3b1SJaegeuk Kim return ERR_PTR(-EPERM); 867e05df3b1SJaegeuk Kim 86854b591dfSJaegeuk Kim page = grab_cache_page(NODE_MAPPING(sbi), dn->nid); 869e05df3b1SJaegeuk Kim if (!page) 870e05df3b1SJaegeuk Kim return ERR_PTR(-ENOMEM); 871e05df3b1SJaegeuk Kim 8726bacf52fSJaegeuk Kim if (unlikely(!inc_valid_node_count(sbi, dn->inode))) { 8739c02740cSJaegeuk Kim err = -ENOSPC; 8749c02740cSJaegeuk Kim goto fail; 8759c02740cSJaegeuk Kim } 876e05df3b1SJaegeuk Kim 8779c02740cSJaegeuk Kim get_node_info(sbi, dn->nid, &old_ni); 878e05df3b1SJaegeuk Kim 879e05df3b1SJaegeuk Kim /* Reinitialize old_ni with new node page */ 8805d56b671SJaegeuk Kim f2fs_bug_on(old_ni.blk_addr != NULL_ADDR); 881e05df3b1SJaegeuk Kim new_ni = old_ni; 882e05df3b1SJaegeuk Kim new_ni.ino = dn->inode->i_ino; 883479f40c4SJaegeuk Kim set_node_addr(sbi, &new_ni, NEW_ADDR, false); 8849c02740cSJaegeuk Kim 88554b591dfSJaegeuk Kim f2fs_wait_on_page_writeback(page, NODE); 8869c02740cSJaegeuk Kim fill_node_footer(page, dn->nid, dn->inode->i_ino, ofs, true); 887398b1ac5SJaegeuk Kim set_cold_node(dn->inode, page); 8889c02740cSJaegeuk Kim SetPageUptodate(page); 8899c02740cSJaegeuk Kim set_page_dirty(page); 890e05df3b1SJaegeuk Kim 8914bc8e9bcSChao Yu if (f2fs_has_xattr_block(ofs)) 892479bd73aSJaegeuk Kim F2FS_I(dn->inode)->i_xattr_nid = dn->nid; 893479bd73aSJaegeuk Kim 894e05df3b1SJaegeuk Kim dn->node_page = page; 8958ae8f162SJaegeuk Kim if (ipage) 8968ae8f162SJaegeuk Kim update_inode(dn->inode, ipage); 8978ae8f162SJaegeuk Kim else 898e05df3b1SJaegeuk Kim sync_inode_page(dn); 899e05df3b1SJaegeuk Kim if (ofs == 0) 900e05df3b1SJaegeuk Kim inc_valid_inode_count(sbi); 901e05df3b1SJaegeuk Kim 902e05df3b1SJaegeuk Kim return page; 903e05df3b1SJaegeuk Kim 904e05df3b1SJaegeuk Kim fail: 90571e9fec5SJaegeuk Kim clear_node_page_dirty(page); 906e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 907e05df3b1SJaegeuk Kim return ERR_PTR(err); 908e05df3b1SJaegeuk Kim } 909e05df3b1SJaegeuk Kim 91056ae674cSJaegeuk Kim /* 91156ae674cSJaegeuk Kim * Caller should do after getting the following values. 91256ae674cSJaegeuk Kim * 0: f2fs_put_page(page, 0) 91356ae674cSJaegeuk Kim * LOCKED_PAGE: f2fs_put_page(page, 1) 91456ae674cSJaegeuk Kim * error: nothing 91556ae674cSJaegeuk Kim */ 91693dfe2acSJaegeuk Kim static int read_node_page(struct page *page, int rw) 917e05df3b1SJaegeuk Kim { 918e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(page->mapping->host->i_sb); 919e05df3b1SJaegeuk Kim struct node_info ni; 920e05df3b1SJaegeuk Kim 921e05df3b1SJaegeuk Kim get_node_info(sbi, page->index, &ni); 922e05df3b1SJaegeuk Kim 9236bacf52fSJaegeuk Kim if (unlikely(ni.blk_addr == NULL_ADDR)) { 924393ff91fSJaegeuk Kim f2fs_put_page(page, 1); 925e05df3b1SJaegeuk Kim return -ENOENT; 926393ff91fSJaegeuk Kim } 927393ff91fSJaegeuk Kim 92856ae674cSJaegeuk Kim if (PageUptodate(page)) 92956ae674cSJaegeuk Kim return LOCKED_PAGE; 930393ff91fSJaegeuk Kim 93193dfe2acSJaegeuk Kim return f2fs_submit_page_bio(sbi, page, ni.blk_addr, rw); 932e05df3b1SJaegeuk Kim } 933e05df3b1SJaegeuk Kim 9340a8165d7SJaegeuk Kim /* 935e05df3b1SJaegeuk Kim * Readahead a node page 936e05df3b1SJaegeuk Kim */ 937e05df3b1SJaegeuk Kim void ra_node_page(struct f2fs_sb_info *sbi, nid_t nid) 938e05df3b1SJaegeuk Kim { 939e05df3b1SJaegeuk Kim struct page *apage; 94056ae674cSJaegeuk Kim int err; 941e05df3b1SJaegeuk Kim 9424ef51a8fSJaegeuk Kim apage = find_get_page(NODE_MAPPING(sbi), nid); 943393ff91fSJaegeuk Kim if (apage && PageUptodate(apage)) { 944393ff91fSJaegeuk Kim f2fs_put_page(apage, 0); 945393ff91fSJaegeuk Kim return; 946393ff91fSJaegeuk Kim } 947e05df3b1SJaegeuk Kim f2fs_put_page(apage, 0); 948e05df3b1SJaegeuk Kim 9494ef51a8fSJaegeuk Kim apage = grab_cache_page(NODE_MAPPING(sbi), nid); 950e05df3b1SJaegeuk Kim if (!apage) 951e05df3b1SJaegeuk Kim return; 952e05df3b1SJaegeuk Kim 95356ae674cSJaegeuk Kim err = read_node_page(apage, READA); 95456ae674cSJaegeuk Kim if (err == 0) 955369a708cSJaegeuk Kim f2fs_put_page(apage, 0); 95656ae674cSJaegeuk Kim else if (err == LOCKED_PAGE) 95756ae674cSJaegeuk Kim f2fs_put_page(apage, 1); 958e05df3b1SJaegeuk Kim } 959e05df3b1SJaegeuk Kim 960e05df3b1SJaegeuk Kim struct page *get_node_page(struct f2fs_sb_info *sbi, pgoff_t nid) 961e05df3b1SJaegeuk Kim { 96256ae674cSJaegeuk Kim struct page *page; 96356ae674cSJaegeuk Kim int err; 964afcb7ca0SJaegeuk Kim repeat: 96554b591dfSJaegeuk Kim page = grab_cache_page(NODE_MAPPING(sbi), nid); 966e05df3b1SJaegeuk Kim if (!page) 967e05df3b1SJaegeuk Kim return ERR_PTR(-ENOMEM); 968e05df3b1SJaegeuk Kim 969e05df3b1SJaegeuk Kim err = read_node_page(page, READ_SYNC); 97056ae674cSJaegeuk Kim if (err < 0) 971e05df3b1SJaegeuk Kim return ERR_PTR(err); 97256ae674cSJaegeuk Kim else if (err == LOCKED_PAGE) 97356ae674cSJaegeuk Kim goto got_it; 974e05df3b1SJaegeuk Kim 975393ff91fSJaegeuk Kim lock_page(page); 9763bb5e2c8SJaegeuk Kim if (unlikely(!PageUptodate(page) || nid != nid_of_node(page))) { 977393ff91fSJaegeuk Kim f2fs_put_page(page, 1); 978393ff91fSJaegeuk Kim return ERR_PTR(-EIO); 979393ff91fSJaegeuk Kim } 9804ef51a8fSJaegeuk Kim if (unlikely(page->mapping != NODE_MAPPING(sbi))) { 981afcb7ca0SJaegeuk Kim f2fs_put_page(page, 1); 982afcb7ca0SJaegeuk Kim goto repeat; 983afcb7ca0SJaegeuk Kim } 98456ae674cSJaegeuk Kim got_it: 985e05df3b1SJaegeuk Kim mark_page_accessed(page); 986e05df3b1SJaegeuk Kim return page; 987e05df3b1SJaegeuk Kim } 988e05df3b1SJaegeuk Kim 9890a8165d7SJaegeuk Kim /* 990e05df3b1SJaegeuk Kim * Return a locked page for the desired node page. 991e05df3b1SJaegeuk Kim * And, readahead MAX_RA_NODE number of node pages. 992e05df3b1SJaegeuk Kim */ 993e05df3b1SJaegeuk Kim struct page *get_node_page_ra(struct page *parent, int start) 994e05df3b1SJaegeuk Kim { 995e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(parent->mapping->host->i_sb); 996c718379bSJaegeuk Kim struct blk_plug plug; 997e05df3b1SJaegeuk Kim struct page *page; 99856ae674cSJaegeuk Kim int err, i, end; 99956ae674cSJaegeuk Kim nid_t nid; 1000e05df3b1SJaegeuk Kim 1001e05df3b1SJaegeuk Kim /* First, try getting the desired direct node. */ 1002e05df3b1SJaegeuk Kim nid = get_nid(parent, start, false); 1003e05df3b1SJaegeuk Kim if (!nid) 1004e05df3b1SJaegeuk Kim return ERR_PTR(-ENOENT); 1005afcb7ca0SJaegeuk Kim repeat: 10064ef51a8fSJaegeuk Kim page = grab_cache_page(NODE_MAPPING(sbi), nid); 1007e05df3b1SJaegeuk Kim if (!page) 1008e05df3b1SJaegeuk Kim return ERR_PTR(-ENOMEM); 1009e05df3b1SJaegeuk Kim 101066d36a29SJaegeuk Kim err = read_node_page(page, READ_SYNC); 101156ae674cSJaegeuk Kim if (err < 0) 1012e05df3b1SJaegeuk Kim return ERR_PTR(err); 101356ae674cSJaegeuk Kim else if (err == LOCKED_PAGE) 101456ae674cSJaegeuk Kim goto page_hit; 1015e05df3b1SJaegeuk Kim 1016c718379bSJaegeuk Kim blk_start_plug(&plug); 1017c718379bSJaegeuk Kim 1018e05df3b1SJaegeuk Kim /* Then, try readahead for siblings of the desired node */ 1019e05df3b1SJaegeuk Kim end = start + MAX_RA_NODE; 1020e05df3b1SJaegeuk Kim end = min(end, NIDS_PER_BLOCK); 1021e05df3b1SJaegeuk Kim for (i = start + 1; i < end; i++) { 1022e05df3b1SJaegeuk Kim nid = get_nid(parent, i, false); 1023e05df3b1SJaegeuk Kim if (!nid) 1024e05df3b1SJaegeuk Kim continue; 1025e05df3b1SJaegeuk Kim ra_node_page(sbi, nid); 1026e05df3b1SJaegeuk Kim } 1027e05df3b1SJaegeuk Kim 1028c718379bSJaegeuk Kim blk_finish_plug(&plug); 1029c718379bSJaegeuk Kim 1030e05df3b1SJaegeuk Kim lock_page(page); 10314ef51a8fSJaegeuk Kim if (unlikely(page->mapping != NODE_MAPPING(sbi))) { 1032afcb7ca0SJaegeuk Kim f2fs_put_page(page, 1); 1033afcb7ca0SJaegeuk Kim goto repeat; 1034afcb7ca0SJaegeuk Kim } 1035e0f56cb4SNamjae Jeon page_hit: 10366bacf52fSJaegeuk Kim if (unlikely(!PageUptodate(page))) { 1037e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 1038e05df3b1SJaegeuk Kim return ERR_PTR(-EIO); 1039e05df3b1SJaegeuk Kim } 1040393ff91fSJaegeuk Kim mark_page_accessed(page); 1041e05df3b1SJaegeuk Kim return page; 1042e05df3b1SJaegeuk Kim } 1043e05df3b1SJaegeuk Kim 1044e05df3b1SJaegeuk Kim void sync_inode_page(struct dnode_of_data *dn) 1045e05df3b1SJaegeuk Kim { 1046e05df3b1SJaegeuk Kim if (IS_INODE(dn->node_page) || dn->inode_page == dn->node_page) { 1047e05df3b1SJaegeuk Kim update_inode(dn->inode, dn->node_page); 1048e05df3b1SJaegeuk Kim } else if (dn->inode_page) { 1049e05df3b1SJaegeuk Kim if (!dn->inode_page_locked) 1050e05df3b1SJaegeuk Kim lock_page(dn->inode_page); 1051e05df3b1SJaegeuk Kim update_inode(dn->inode, dn->inode_page); 1052e05df3b1SJaegeuk Kim if (!dn->inode_page_locked) 1053e05df3b1SJaegeuk Kim unlock_page(dn->inode_page); 1054e05df3b1SJaegeuk Kim } else { 105539936837SJaegeuk Kim update_inode_page(dn->inode); 1056e05df3b1SJaegeuk Kim } 1057e05df3b1SJaegeuk Kim } 1058e05df3b1SJaegeuk Kim 1059e05df3b1SJaegeuk Kim int sync_node_pages(struct f2fs_sb_info *sbi, nid_t ino, 1060e05df3b1SJaegeuk Kim struct writeback_control *wbc) 1061e05df3b1SJaegeuk Kim { 1062e05df3b1SJaegeuk Kim pgoff_t index, end; 1063e05df3b1SJaegeuk Kim struct pagevec pvec; 1064e05df3b1SJaegeuk Kim int step = ino ? 2 : 0; 1065e05df3b1SJaegeuk Kim int nwritten = 0, wrote = 0; 1066e05df3b1SJaegeuk Kim 1067e05df3b1SJaegeuk Kim pagevec_init(&pvec, 0); 1068e05df3b1SJaegeuk Kim 1069e05df3b1SJaegeuk Kim next_step: 1070e05df3b1SJaegeuk Kim index = 0; 1071e05df3b1SJaegeuk Kim end = LONG_MAX; 1072e05df3b1SJaegeuk Kim 1073e05df3b1SJaegeuk Kim while (index <= end) { 1074e05df3b1SJaegeuk Kim int i, nr_pages; 10754ef51a8fSJaegeuk Kim nr_pages = pagevec_lookup_tag(&pvec, NODE_MAPPING(sbi), &index, 1076e05df3b1SJaegeuk Kim PAGECACHE_TAG_DIRTY, 1077e05df3b1SJaegeuk Kim min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1); 1078e05df3b1SJaegeuk Kim if (nr_pages == 0) 1079e05df3b1SJaegeuk Kim break; 1080e05df3b1SJaegeuk Kim 1081e05df3b1SJaegeuk Kim for (i = 0; i < nr_pages; i++) { 1082e05df3b1SJaegeuk Kim struct page *page = pvec.pages[i]; 1083e05df3b1SJaegeuk Kim 1084e05df3b1SJaegeuk Kim /* 1085e05df3b1SJaegeuk Kim * flushing sequence with step: 1086e05df3b1SJaegeuk Kim * 0. indirect nodes 1087e05df3b1SJaegeuk Kim * 1. dentry dnodes 1088e05df3b1SJaegeuk Kim * 2. file dnodes 1089e05df3b1SJaegeuk Kim */ 1090e05df3b1SJaegeuk Kim if (step == 0 && IS_DNODE(page)) 1091e05df3b1SJaegeuk Kim continue; 1092e05df3b1SJaegeuk Kim if (step == 1 && (!IS_DNODE(page) || 1093e05df3b1SJaegeuk Kim is_cold_node(page))) 1094e05df3b1SJaegeuk Kim continue; 1095e05df3b1SJaegeuk Kim if (step == 2 && (!IS_DNODE(page) || 1096e05df3b1SJaegeuk Kim !is_cold_node(page))) 1097e05df3b1SJaegeuk Kim continue; 1098e05df3b1SJaegeuk Kim 1099e05df3b1SJaegeuk Kim /* 1100e05df3b1SJaegeuk Kim * If an fsync mode, 1101e05df3b1SJaegeuk Kim * we should not skip writing node pages. 1102e05df3b1SJaegeuk Kim */ 1103e05df3b1SJaegeuk Kim if (ino && ino_of_node(page) == ino) 1104e05df3b1SJaegeuk Kim lock_page(page); 1105e05df3b1SJaegeuk Kim else if (!trylock_page(page)) 1106e05df3b1SJaegeuk Kim continue; 1107e05df3b1SJaegeuk Kim 11084ef51a8fSJaegeuk Kim if (unlikely(page->mapping != NODE_MAPPING(sbi))) { 1109e05df3b1SJaegeuk Kim continue_unlock: 1110e05df3b1SJaegeuk Kim unlock_page(page); 1111e05df3b1SJaegeuk Kim continue; 1112e05df3b1SJaegeuk Kim } 1113e05df3b1SJaegeuk Kim if (ino && ino_of_node(page) != ino) 1114e05df3b1SJaegeuk Kim goto continue_unlock; 1115e05df3b1SJaegeuk Kim 1116e05df3b1SJaegeuk Kim if (!PageDirty(page)) { 1117e05df3b1SJaegeuk Kim /* someone wrote it for us */ 1118e05df3b1SJaegeuk Kim goto continue_unlock; 1119e05df3b1SJaegeuk Kim } 1120e05df3b1SJaegeuk Kim 1121e05df3b1SJaegeuk Kim if (!clear_page_dirty_for_io(page)) 1122e05df3b1SJaegeuk Kim goto continue_unlock; 1123e05df3b1SJaegeuk Kim 1124e05df3b1SJaegeuk Kim /* called by fsync() */ 1125e05df3b1SJaegeuk Kim if (ino && IS_DNODE(page)) { 1126e05df3b1SJaegeuk Kim int mark = !is_checkpointed_node(sbi, ino); 1127e05df3b1SJaegeuk Kim set_fsync_mark(page, 1); 1128e05df3b1SJaegeuk Kim if (IS_INODE(page)) 1129e05df3b1SJaegeuk Kim set_dentry_mark(page, mark); 1130e05df3b1SJaegeuk Kim nwritten++; 1131e05df3b1SJaegeuk Kim } else { 1132e05df3b1SJaegeuk Kim set_fsync_mark(page, 0); 1133e05df3b1SJaegeuk Kim set_dentry_mark(page, 0); 1134e05df3b1SJaegeuk Kim } 11354ef51a8fSJaegeuk Kim NODE_MAPPING(sbi)->a_ops->writepage(page, wbc); 1136e05df3b1SJaegeuk Kim wrote++; 1137e05df3b1SJaegeuk Kim 1138e05df3b1SJaegeuk Kim if (--wbc->nr_to_write == 0) 1139e05df3b1SJaegeuk Kim break; 1140e05df3b1SJaegeuk Kim } 1141e05df3b1SJaegeuk Kim pagevec_release(&pvec); 1142e05df3b1SJaegeuk Kim cond_resched(); 1143e05df3b1SJaegeuk Kim 1144e05df3b1SJaegeuk Kim if (wbc->nr_to_write == 0) { 1145e05df3b1SJaegeuk Kim step = 2; 1146e05df3b1SJaegeuk Kim break; 1147e05df3b1SJaegeuk Kim } 1148e05df3b1SJaegeuk Kim } 1149e05df3b1SJaegeuk Kim 1150e05df3b1SJaegeuk Kim if (step < 2) { 1151e05df3b1SJaegeuk Kim step++; 1152e05df3b1SJaegeuk Kim goto next_step; 1153e05df3b1SJaegeuk Kim } 1154e05df3b1SJaegeuk Kim 1155e05df3b1SJaegeuk Kim if (wrote) 1156458e6197SJaegeuk Kim f2fs_submit_merged_bio(sbi, NODE, WRITE); 1157e05df3b1SJaegeuk Kim return nwritten; 1158e05df3b1SJaegeuk Kim } 1159e05df3b1SJaegeuk Kim 1160cfe58f9dSJaegeuk Kim int wait_on_node_pages_writeback(struct f2fs_sb_info *sbi, nid_t ino) 1161cfe58f9dSJaegeuk Kim { 1162cfe58f9dSJaegeuk Kim pgoff_t index = 0, end = LONG_MAX; 1163cfe58f9dSJaegeuk Kim struct pagevec pvec; 1164cfe58f9dSJaegeuk Kim int ret2 = 0, ret = 0; 1165cfe58f9dSJaegeuk Kim 1166cfe58f9dSJaegeuk Kim pagevec_init(&pvec, 0); 11674ef51a8fSJaegeuk Kim 11684ef51a8fSJaegeuk Kim while (index <= end) { 11694ef51a8fSJaegeuk Kim int i, nr_pages; 11704ef51a8fSJaegeuk Kim nr_pages = pagevec_lookup_tag(&pvec, NODE_MAPPING(sbi), &index, 1171cfe58f9dSJaegeuk Kim PAGECACHE_TAG_WRITEBACK, 11724ef51a8fSJaegeuk Kim min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1); 11734ef51a8fSJaegeuk Kim if (nr_pages == 0) 11744ef51a8fSJaegeuk Kim break; 1175cfe58f9dSJaegeuk Kim 1176cfe58f9dSJaegeuk Kim for (i = 0; i < nr_pages; i++) { 1177cfe58f9dSJaegeuk Kim struct page *page = pvec.pages[i]; 1178cfe58f9dSJaegeuk Kim 1179cfe58f9dSJaegeuk Kim /* until radix tree lookup accepts end_index */ 1180cfb271d4SChao Yu if (unlikely(page->index > end)) 1181cfe58f9dSJaegeuk Kim continue; 1182cfe58f9dSJaegeuk Kim 11834bf08ff6SChao Yu if (ino && ino_of_node(page) == ino) { 11843cb5ad15SJaegeuk Kim f2fs_wait_on_page_writeback(page, NODE); 1185cfe58f9dSJaegeuk Kim if (TestClearPageError(page)) 1186cfe58f9dSJaegeuk Kim ret = -EIO; 1187cfe58f9dSJaegeuk Kim } 11884bf08ff6SChao Yu } 1189cfe58f9dSJaegeuk Kim pagevec_release(&pvec); 1190cfe58f9dSJaegeuk Kim cond_resched(); 1191cfe58f9dSJaegeuk Kim } 1192cfe58f9dSJaegeuk Kim 11934ef51a8fSJaegeuk Kim if (unlikely(test_and_clear_bit(AS_ENOSPC, &NODE_MAPPING(sbi)->flags))) 1194cfe58f9dSJaegeuk Kim ret2 = -ENOSPC; 11954ef51a8fSJaegeuk Kim if (unlikely(test_and_clear_bit(AS_EIO, &NODE_MAPPING(sbi)->flags))) 1196cfe58f9dSJaegeuk Kim ret2 = -EIO; 1197cfe58f9dSJaegeuk Kim if (!ret) 1198cfe58f9dSJaegeuk Kim ret = ret2; 1199cfe58f9dSJaegeuk Kim return ret; 1200cfe58f9dSJaegeuk Kim } 1201cfe58f9dSJaegeuk Kim 1202e05df3b1SJaegeuk Kim static int f2fs_write_node_page(struct page *page, 1203e05df3b1SJaegeuk Kim struct writeback_control *wbc) 1204e05df3b1SJaegeuk Kim { 1205e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(page->mapping->host->i_sb); 1206e05df3b1SJaegeuk Kim nid_t nid; 1207e05df3b1SJaegeuk Kim block_t new_addr; 1208e05df3b1SJaegeuk Kim struct node_info ni; 1209fb5566daSJaegeuk Kim struct f2fs_io_info fio = { 1210fb5566daSJaegeuk Kim .type = NODE, 1211fb5566daSJaegeuk Kim .rw = (wbc->sync_mode == WB_SYNC_ALL) ? WRITE_SYNC : WRITE, 1212fb5566daSJaegeuk Kim }; 1213e05df3b1SJaegeuk Kim 1214ecda0de3SChao Yu trace_f2fs_writepage(page, NODE); 1215ecda0de3SChao Yu 1216cfb271d4SChao Yu if (unlikely(sbi->por_doing)) 121787a9bd26SJaegeuk Kim goto redirty_out; 121887a9bd26SJaegeuk Kim 12193cb5ad15SJaegeuk Kim f2fs_wait_on_page_writeback(page, NODE); 1220e05df3b1SJaegeuk Kim 1221e05df3b1SJaegeuk Kim /* get old block addr of this node page */ 1222e05df3b1SJaegeuk Kim nid = nid_of_node(page); 12235d56b671SJaegeuk Kim f2fs_bug_on(page->index != nid); 1224e05df3b1SJaegeuk Kim 1225e05df3b1SJaegeuk Kim get_node_info(sbi, nid, &ni); 1226e05df3b1SJaegeuk Kim 1227e05df3b1SJaegeuk Kim /* This page is already truncated */ 12286bacf52fSJaegeuk Kim if (unlikely(ni.blk_addr == NULL_ADDR)) { 122939936837SJaegeuk Kim dec_page_count(sbi, F2FS_DIRTY_NODES); 123039936837SJaegeuk Kim unlock_page(page); 123139936837SJaegeuk Kim return 0; 123239936837SJaegeuk Kim } 1233e05df3b1SJaegeuk Kim 123487a9bd26SJaegeuk Kim if (wbc->for_reclaim) 123587a9bd26SJaegeuk Kim goto redirty_out; 123608d8058bSJaegeuk Kim 123739936837SJaegeuk Kim mutex_lock(&sbi->node_write); 1238e05df3b1SJaegeuk Kim set_page_writeback(page); 1239fb5566daSJaegeuk Kim write_node_page(sbi, page, &fio, nid, ni.blk_addr, &new_addr); 1240479f40c4SJaegeuk Kim set_node_addr(sbi, &ni, new_addr, is_fsync_dnode(page)); 1241e05df3b1SJaegeuk Kim dec_page_count(sbi, F2FS_DIRTY_NODES); 124239936837SJaegeuk Kim mutex_unlock(&sbi->node_write); 1243e05df3b1SJaegeuk Kim unlock_page(page); 1244e05df3b1SJaegeuk Kim return 0; 124587a9bd26SJaegeuk Kim 124687a9bd26SJaegeuk Kim redirty_out: 124776f60268SJaegeuk Kim redirty_page_for_writepage(wbc, page); 124887a9bd26SJaegeuk Kim return AOP_WRITEPAGE_ACTIVATE; 1249e05df3b1SJaegeuk Kim } 1250e05df3b1SJaegeuk Kim 1251e05df3b1SJaegeuk Kim static int f2fs_write_node_pages(struct address_space *mapping, 1252e05df3b1SJaegeuk Kim struct writeback_control *wbc) 1253e05df3b1SJaegeuk Kim { 1254e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(mapping->host->i_sb); 125550c8cdb3SJaegeuk Kim long diff; 1256e05df3b1SJaegeuk Kim 1257e5748434SChao Yu trace_f2fs_writepages(mapping->host, wbc, NODE); 1258e5748434SChao Yu 12594660f9c0SJaegeuk Kim /* balancing f2fs's metadata in background */ 12604660f9c0SJaegeuk Kim f2fs_balance_fs_bg(sbi); 1261e05df3b1SJaegeuk Kim 1262a7fdffbdSJaegeuk Kim /* collect a number of dirty node pages and write together */ 126387d6f890SJaegeuk Kim if (get_pages(sbi, F2FS_DIRTY_NODES) < nr_pages_to_skip(sbi, NODE)) 1264d3baf95dSJaegeuk Kim goto skip_write; 1265a7fdffbdSJaegeuk Kim 126650c8cdb3SJaegeuk Kim diff = nr_pages_to_write(sbi, NODE, wbc); 1267fb5566daSJaegeuk Kim wbc->sync_mode = WB_SYNC_NONE; 1268e05df3b1SJaegeuk Kim sync_node_pages(sbi, 0, wbc); 126950c8cdb3SJaegeuk Kim wbc->nr_to_write = max((long)0, wbc->nr_to_write - diff); 1270e05df3b1SJaegeuk Kim return 0; 1271d3baf95dSJaegeuk Kim 1272d3baf95dSJaegeuk Kim skip_write: 1273d3baf95dSJaegeuk Kim wbc->pages_skipped += get_pages(sbi, F2FS_DIRTY_NODES); 1274d3baf95dSJaegeuk Kim return 0; 1275e05df3b1SJaegeuk Kim } 1276e05df3b1SJaegeuk Kim 1277e05df3b1SJaegeuk Kim static int f2fs_set_node_page_dirty(struct page *page) 1278e05df3b1SJaegeuk Kim { 1279e05df3b1SJaegeuk Kim struct address_space *mapping = page->mapping; 1280e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(mapping->host->i_sb); 1281e05df3b1SJaegeuk Kim 128226c6b887SJaegeuk Kim trace_f2fs_set_page_dirty(page, NODE); 128326c6b887SJaegeuk Kim 1284e05df3b1SJaegeuk Kim SetPageUptodate(page); 1285e05df3b1SJaegeuk Kim if (!PageDirty(page)) { 1286e05df3b1SJaegeuk Kim __set_page_dirty_nobuffers(page); 1287e05df3b1SJaegeuk Kim inc_page_count(sbi, F2FS_DIRTY_NODES); 1288e05df3b1SJaegeuk Kim SetPagePrivate(page); 1289e05df3b1SJaegeuk Kim return 1; 1290e05df3b1SJaegeuk Kim } 1291e05df3b1SJaegeuk Kim return 0; 1292e05df3b1SJaegeuk Kim } 1293e05df3b1SJaegeuk Kim 1294d47992f8SLukas Czerner static void f2fs_invalidate_node_page(struct page *page, unsigned int offset, 1295d47992f8SLukas Czerner unsigned int length) 1296e05df3b1SJaegeuk Kim { 1297e05df3b1SJaegeuk Kim struct inode *inode = page->mapping->host; 1298e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); 1299e05df3b1SJaegeuk Kim if (PageDirty(page)) 1300e05df3b1SJaegeuk Kim dec_page_count(sbi, F2FS_DIRTY_NODES); 1301e05df3b1SJaegeuk Kim ClearPagePrivate(page); 1302e05df3b1SJaegeuk Kim } 1303e05df3b1SJaegeuk Kim 1304e05df3b1SJaegeuk Kim static int f2fs_release_node_page(struct page *page, gfp_t wait) 1305e05df3b1SJaegeuk Kim { 1306e05df3b1SJaegeuk Kim ClearPagePrivate(page); 1307c3850aa1SJaegeuk Kim return 1; 1308e05df3b1SJaegeuk Kim } 1309e05df3b1SJaegeuk Kim 13100a8165d7SJaegeuk Kim /* 1311e05df3b1SJaegeuk Kim * Structure of the f2fs node operations 1312e05df3b1SJaegeuk Kim */ 1313e05df3b1SJaegeuk Kim const struct address_space_operations f2fs_node_aops = { 1314e05df3b1SJaegeuk Kim .writepage = f2fs_write_node_page, 1315e05df3b1SJaegeuk Kim .writepages = f2fs_write_node_pages, 1316e05df3b1SJaegeuk Kim .set_page_dirty = f2fs_set_node_page_dirty, 1317e05df3b1SJaegeuk Kim .invalidatepage = f2fs_invalidate_node_page, 1318e05df3b1SJaegeuk Kim .releasepage = f2fs_release_node_page, 1319e05df3b1SJaegeuk Kim }; 1320e05df3b1SJaegeuk Kim 13218a7ed66aSJaegeuk Kim static struct free_nid *__lookup_free_nid_list(struct f2fs_nm_info *nm_i, 13228a7ed66aSJaegeuk Kim nid_t n) 1323e05df3b1SJaegeuk Kim { 13248a7ed66aSJaegeuk Kim return radix_tree_lookup(&nm_i->free_nid_root, n); 13253aa770a9SNamjae Jeon } 1326e05df3b1SJaegeuk Kim 13278a7ed66aSJaegeuk Kim static void __del_from_free_nid_list(struct f2fs_nm_info *nm_i, 13288a7ed66aSJaegeuk Kim struct free_nid *i) 1329e05df3b1SJaegeuk Kim { 1330e05df3b1SJaegeuk Kim list_del(&i->list); 13318a7ed66aSJaegeuk Kim radix_tree_delete(&nm_i->free_nid_root, i->nid); 1332e05df3b1SJaegeuk Kim } 1333e05df3b1SJaegeuk Kim 13346fb03f3aSJaegeuk Kim static int add_free_nid(struct f2fs_sb_info *sbi, nid_t nid, bool build) 1335e05df3b1SJaegeuk Kim { 13366fb03f3aSJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1337e05df3b1SJaegeuk Kim struct free_nid *i; 133859bbd474SJaegeuk Kim struct nat_entry *ne; 133959bbd474SJaegeuk Kim bool allocated = false; 1340e05df3b1SJaegeuk Kim 13416fb03f3aSJaegeuk Kim if (!available_free_memory(sbi, FREE_NIDS)) 134223d38844SHaicheng Li return -1; 13439198acebSJaegeuk Kim 13449198acebSJaegeuk Kim /* 0 nid should not be used */ 1345cfb271d4SChao Yu if (unlikely(nid == 0)) 13469198acebSJaegeuk Kim return 0; 134759bbd474SJaegeuk Kim 13487bd59381SGu Zheng if (build) { 134959bbd474SJaegeuk Kim /* do not add allocated nids */ 135059bbd474SJaegeuk Kim read_lock(&nm_i->nat_tree_lock); 135159bbd474SJaegeuk Kim ne = __lookup_nat_cache(nm_i, nid); 13528a7ed66aSJaegeuk Kim if (ne && 13538a7ed66aSJaegeuk Kim (!ne->checkpointed || nat_get_blkaddr(ne) != NULL_ADDR)) 135459bbd474SJaegeuk Kim allocated = true; 135559bbd474SJaegeuk Kim read_unlock(&nm_i->nat_tree_lock); 135659bbd474SJaegeuk Kim if (allocated) 135759bbd474SJaegeuk Kim return 0; 1358e05df3b1SJaegeuk Kim } 13597bd59381SGu Zheng 13607bd59381SGu Zheng i = f2fs_kmem_cache_alloc(free_nid_slab, GFP_NOFS); 1361e05df3b1SJaegeuk Kim i->nid = nid; 1362e05df3b1SJaegeuk Kim i->state = NID_NEW; 1363e05df3b1SJaegeuk Kim 1364e05df3b1SJaegeuk Kim spin_lock(&nm_i->free_nid_list_lock); 13658a7ed66aSJaegeuk Kim if (radix_tree_insert(&nm_i->free_nid_root, i->nid, i)) { 1366e05df3b1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1367e05df3b1SJaegeuk Kim kmem_cache_free(free_nid_slab, i); 1368e05df3b1SJaegeuk Kim return 0; 1369e05df3b1SJaegeuk Kim } 1370e05df3b1SJaegeuk Kim list_add_tail(&i->list, &nm_i->free_nid_list); 1371e05df3b1SJaegeuk Kim nm_i->fcnt++; 1372e05df3b1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1373e05df3b1SJaegeuk Kim return 1; 1374e05df3b1SJaegeuk Kim } 1375e05df3b1SJaegeuk Kim 1376e05df3b1SJaegeuk Kim static void remove_free_nid(struct f2fs_nm_info *nm_i, nid_t nid) 1377e05df3b1SJaegeuk Kim { 1378e05df3b1SJaegeuk Kim struct free_nid *i; 1379cf0ee0f0SChao Yu bool need_free = false; 1380cf0ee0f0SChao Yu 1381e05df3b1SJaegeuk Kim spin_lock(&nm_i->free_nid_list_lock); 13828a7ed66aSJaegeuk Kim i = __lookup_free_nid_list(nm_i, nid); 1383e05df3b1SJaegeuk Kim if (i && i->state == NID_NEW) { 13848a7ed66aSJaegeuk Kim __del_from_free_nid_list(nm_i, i); 1385e05df3b1SJaegeuk Kim nm_i->fcnt--; 1386cf0ee0f0SChao Yu need_free = true; 1387e05df3b1SJaegeuk Kim } 1388e05df3b1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1389cf0ee0f0SChao Yu 1390cf0ee0f0SChao Yu if (need_free) 1391cf0ee0f0SChao Yu kmem_cache_free(free_nid_slab, i); 1392e05df3b1SJaegeuk Kim } 1393e05df3b1SJaegeuk Kim 13946fb03f3aSJaegeuk Kim static void scan_nat_page(struct f2fs_sb_info *sbi, 1395e05df3b1SJaegeuk Kim struct page *nat_page, nid_t start_nid) 1396e05df3b1SJaegeuk Kim { 13976fb03f3aSJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1398e05df3b1SJaegeuk Kim struct f2fs_nat_block *nat_blk = page_address(nat_page); 1399e05df3b1SJaegeuk Kim block_t blk_addr; 1400e05df3b1SJaegeuk Kim int i; 1401e05df3b1SJaegeuk Kim 1402e05df3b1SJaegeuk Kim i = start_nid % NAT_ENTRY_PER_BLOCK; 1403e05df3b1SJaegeuk Kim 1404e05df3b1SJaegeuk Kim for (; i < NAT_ENTRY_PER_BLOCK; i++, start_nid++) { 140523d38844SHaicheng Li 1406cfb271d4SChao Yu if (unlikely(start_nid >= nm_i->max_nid)) 140704431c44SJaegeuk Kim break; 140823d38844SHaicheng Li 1409e05df3b1SJaegeuk Kim blk_addr = le32_to_cpu(nat_blk->entries[i].block_addr); 14105d56b671SJaegeuk Kim f2fs_bug_on(blk_addr == NEW_ADDR); 141123d38844SHaicheng Li if (blk_addr == NULL_ADDR) { 14126fb03f3aSJaegeuk Kim if (add_free_nid(sbi, start_nid, true) < 0) 141323d38844SHaicheng Li break; 141423d38844SHaicheng Li } 1415e05df3b1SJaegeuk Kim } 1416e05df3b1SJaegeuk Kim } 1417e05df3b1SJaegeuk Kim 1418e05df3b1SJaegeuk Kim static void build_free_nids(struct f2fs_sb_info *sbi) 1419e05df3b1SJaegeuk Kim { 1420e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1421e05df3b1SJaegeuk Kim struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); 1422e05df3b1SJaegeuk Kim struct f2fs_summary_block *sum = curseg->sum_blk; 14238760952dSHaicheng Li int i = 0; 142455008d84SJaegeuk Kim nid_t nid = nm_i->next_scan_nid; 1425e05df3b1SJaegeuk Kim 142655008d84SJaegeuk Kim /* Enough entries */ 142755008d84SJaegeuk Kim if (nm_i->fcnt > NAT_ENTRY_PER_BLOCK) 142855008d84SJaegeuk Kim return; 1429e05df3b1SJaegeuk Kim 143055008d84SJaegeuk Kim /* readahead nat pages to be scanned */ 1431662befdaSChao Yu ra_meta_pages(sbi, NAT_BLOCK_OFFSET(nid), FREE_NID_PAGES, META_NAT); 1432e05df3b1SJaegeuk Kim 1433e05df3b1SJaegeuk Kim while (1) { 1434e05df3b1SJaegeuk Kim struct page *page = get_current_nat_page(sbi, nid); 1435e05df3b1SJaegeuk Kim 14366fb03f3aSJaegeuk Kim scan_nat_page(sbi, page, nid); 1437e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 1438e05df3b1SJaegeuk Kim 1439e05df3b1SJaegeuk Kim nid += (NAT_ENTRY_PER_BLOCK - (nid % NAT_ENTRY_PER_BLOCK)); 1440cfb271d4SChao Yu if (unlikely(nid >= nm_i->max_nid)) 1441e05df3b1SJaegeuk Kim nid = 0; 144255008d84SJaegeuk Kim 144355008d84SJaegeuk Kim if (i++ == FREE_NID_PAGES) 1444e05df3b1SJaegeuk Kim break; 1445e05df3b1SJaegeuk Kim } 1446e05df3b1SJaegeuk Kim 144755008d84SJaegeuk Kim /* go to the next free nat pages to find free nids abundantly */ 144855008d84SJaegeuk Kim nm_i->next_scan_nid = nid; 1449e05df3b1SJaegeuk Kim 1450e05df3b1SJaegeuk Kim /* find free nids from current sum_pages */ 1451e05df3b1SJaegeuk Kim mutex_lock(&curseg->curseg_mutex); 1452e05df3b1SJaegeuk Kim for (i = 0; i < nats_in_cursum(sum); i++) { 1453e05df3b1SJaegeuk Kim block_t addr = le32_to_cpu(nat_in_journal(sum, i).block_addr); 1454e05df3b1SJaegeuk Kim nid = le32_to_cpu(nid_in_journal(sum, i)); 1455e05df3b1SJaegeuk Kim if (addr == NULL_ADDR) 14566fb03f3aSJaegeuk Kim add_free_nid(sbi, nid, true); 1457e05df3b1SJaegeuk Kim else 1458e05df3b1SJaegeuk Kim remove_free_nid(nm_i, nid); 1459e05df3b1SJaegeuk Kim } 1460e05df3b1SJaegeuk Kim mutex_unlock(&curseg->curseg_mutex); 1461e05df3b1SJaegeuk Kim } 1462e05df3b1SJaegeuk Kim 1463e05df3b1SJaegeuk Kim /* 1464e05df3b1SJaegeuk Kim * If this function returns success, caller can obtain a new nid 1465e05df3b1SJaegeuk Kim * from second parameter of this function. 1466e05df3b1SJaegeuk Kim * The returned nid could be used ino as well as nid when inode is created. 1467e05df3b1SJaegeuk Kim */ 1468e05df3b1SJaegeuk Kim bool alloc_nid(struct f2fs_sb_info *sbi, nid_t *nid) 1469e05df3b1SJaegeuk Kim { 1470e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1471e05df3b1SJaegeuk Kim struct free_nid *i = NULL; 1472e05df3b1SJaegeuk Kim retry: 14737ee0eeabSJaegeuk Kim if (unlikely(sbi->total_valid_node_count + 1 > nm_i->available_nids)) 1474e05df3b1SJaegeuk Kim return false; 1475e05df3b1SJaegeuk Kim 1476e05df3b1SJaegeuk Kim spin_lock(&nm_i->free_nid_list_lock); 1477e05df3b1SJaegeuk Kim 147855008d84SJaegeuk Kim /* We should not use stale free nids created by build_free_nids */ 1479f978f5a0SGu Zheng if (nm_i->fcnt && !on_build_free_nids(nm_i)) { 14805d56b671SJaegeuk Kim f2fs_bug_on(list_empty(&nm_i->free_nid_list)); 14812d7b822aSChao Yu list_for_each_entry(i, &nm_i->free_nid_list, list) 1482e05df3b1SJaegeuk Kim if (i->state == NID_NEW) 1483e05df3b1SJaegeuk Kim break; 1484e05df3b1SJaegeuk Kim 14855d56b671SJaegeuk Kim f2fs_bug_on(i->state != NID_NEW); 1486e05df3b1SJaegeuk Kim *nid = i->nid; 1487e05df3b1SJaegeuk Kim i->state = NID_ALLOC; 1488e05df3b1SJaegeuk Kim nm_i->fcnt--; 1489e05df3b1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1490e05df3b1SJaegeuk Kim return true; 1491e05df3b1SJaegeuk Kim } 149255008d84SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 149355008d84SJaegeuk Kim 149455008d84SJaegeuk Kim /* Let's scan nat pages and its caches to get free nids */ 149555008d84SJaegeuk Kim mutex_lock(&nm_i->build_lock); 149655008d84SJaegeuk Kim build_free_nids(sbi); 149755008d84SJaegeuk Kim mutex_unlock(&nm_i->build_lock); 149855008d84SJaegeuk Kim goto retry; 149955008d84SJaegeuk Kim } 1500e05df3b1SJaegeuk Kim 15010a8165d7SJaegeuk Kim /* 1502e05df3b1SJaegeuk Kim * alloc_nid() should be called prior to this function. 1503e05df3b1SJaegeuk Kim */ 1504e05df3b1SJaegeuk Kim void alloc_nid_done(struct f2fs_sb_info *sbi, nid_t nid) 1505e05df3b1SJaegeuk Kim { 1506e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1507e05df3b1SJaegeuk Kim struct free_nid *i; 1508e05df3b1SJaegeuk Kim 1509e05df3b1SJaegeuk Kim spin_lock(&nm_i->free_nid_list_lock); 15108a7ed66aSJaegeuk Kim i = __lookup_free_nid_list(nm_i, nid); 15115d56b671SJaegeuk Kim f2fs_bug_on(!i || i->state != NID_ALLOC); 15128a7ed66aSJaegeuk Kim __del_from_free_nid_list(nm_i, i); 1513e05df3b1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1514cf0ee0f0SChao Yu 1515cf0ee0f0SChao Yu kmem_cache_free(free_nid_slab, i); 1516e05df3b1SJaegeuk Kim } 1517e05df3b1SJaegeuk Kim 15180a8165d7SJaegeuk Kim /* 1519e05df3b1SJaegeuk Kim * alloc_nid() should be called prior to this function. 1520e05df3b1SJaegeuk Kim */ 1521e05df3b1SJaegeuk Kim void alloc_nid_failed(struct f2fs_sb_info *sbi, nid_t nid) 1522e05df3b1SJaegeuk Kim { 152349952fa1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 152449952fa1SJaegeuk Kim struct free_nid *i; 1525cf0ee0f0SChao Yu bool need_free = false; 152649952fa1SJaegeuk Kim 152765985d93SJaegeuk Kim if (!nid) 152865985d93SJaegeuk Kim return; 152965985d93SJaegeuk Kim 153049952fa1SJaegeuk Kim spin_lock(&nm_i->free_nid_list_lock); 15318a7ed66aSJaegeuk Kim i = __lookup_free_nid_list(nm_i, nid); 15325d56b671SJaegeuk Kim f2fs_bug_on(!i || i->state != NID_ALLOC); 15336fb03f3aSJaegeuk Kim if (!available_free_memory(sbi, FREE_NIDS)) { 15348a7ed66aSJaegeuk Kim __del_from_free_nid_list(nm_i, i); 1535cf0ee0f0SChao Yu need_free = true; 153695630cbaSHaicheng Li } else { 153749952fa1SJaegeuk Kim i->state = NID_NEW; 153849952fa1SJaegeuk Kim nm_i->fcnt++; 153995630cbaSHaicheng Li } 154049952fa1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1541cf0ee0f0SChao Yu 1542cf0ee0f0SChao Yu if (need_free) 1543cf0ee0f0SChao Yu kmem_cache_free(free_nid_slab, i); 1544e05df3b1SJaegeuk Kim } 1545e05df3b1SJaegeuk Kim 1546e05df3b1SJaegeuk Kim void recover_node_page(struct f2fs_sb_info *sbi, struct page *page, 1547e05df3b1SJaegeuk Kim struct f2fs_summary *sum, struct node_info *ni, 1548e05df3b1SJaegeuk Kim block_t new_blkaddr) 1549e05df3b1SJaegeuk Kim { 1550e05df3b1SJaegeuk Kim rewrite_node_page(sbi, page, sum, ni->blk_addr, new_blkaddr); 1551479f40c4SJaegeuk Kim set_node_addr(sbi, ni, new_blkaddr, false); 1552e05df3b1SJaegeuk Kim clear_node_page_dirty(page); 1553e05df3b1SJaegeuk Kim } 1554e05df3b1SJaegeuk Kim 1555b156d542SJingoo Han static void recover_inline_xattr(struct inode *inode, struct page *page) 155628cdce04SChao Yu { 155728cdce04SChao Yu struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); 155828cdce04SChao Yu void *src_addr, *dst_addr; 155928cdce04SChao Yu size_t inline_size; 156028cdce04SChao Yu struct page *ipage; 156128cdce04SChao Yu struct f2fs_inode *ri; 156228cdce04SChao Yu 1563987c7c31SChao Yu if (!f2fs_has_inline_xattr(inode)) 156428cdce04SChao Yu return; 156528cdce04SChao Yu 156628cdce04SChao Yu if (!IS_INODE(page)) 156728cdce04SChao Yu return; 156828cdce04SChao Yu 156928cdce04SChao Yu ri = F2FS_INODE(page); 157028cdce04SChao Yu if (!(ri->i_inline & F2FS_INLINE_XATTR)) 157128cdce04SChao Yu return; 157228cdce04SChao Yu 157328cdce04SChao Yu ipage = get_node_page(sbi, inode->i_ino); 157428cdce04SChao Yu f2fs_bug_on(IS_ERR(ipage)); 157528cdce04SChao Yu 157628cdce04SChao Yu dst_addr = inline_xattr_addr(ipage); 157728cdce04SChao Yu src_addr = inline_xattr_addr(page); 157828cdce04SChao Yu inline_size = inline_xattr_size(inode); 157928cdce04SChao Yu 158054b591dfSJaegeuk Kim f2fs_wait_on_page_writeback(ipage, NODE); 158128cdce04SChao Yu memcpy(dst_addr, src_addr, inline_size); 158228cdce04SChao Yu 158328cdce04SChao Yu update_inode(inode, ipage); 158428cdce04SChao Yu f2fs_put_page(ipage, 1); 158528cdce04SChao Yu } 158628cdce04SChao Yu 1587abb2366cSJaegeuk Kim bool recover_xattr_data(struct inode *inode, struct page *page, block_t blkaddr) 1588abb2366cSJaegeuk Kim { 1589abb2366cSJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); 1590abb2366cSJaegeuk Kim nid_t prev_xnid = F2FS_I(inode)->i_xattr_nid; 1591abb2366cSJaegeuk Kim nid_t new_xnid = nid_of_node(page); 1592abb2366cSJaegeuk Kim struct node_info ni; 1593abb2366cSJaegeuk Kim 159428cdce04SChao Yu recover_inline_xattr(inode, page); 159528cdce04SChao Yu 15964bc8e9bcSChao Yu if (!f2fs_has_xattr_block(ofs_of_node(page))) 1597abb2366cSJaegeuk Kim return false; 1598abb2366cSJaegeuk Kim 1599abb2366cSJaegeuk Kim /* 1: invalidate the previous xattr nid */ 1600abb2366cSJaegeuk Kim if (!prev_xnid) 1601abb2366cSJaegeuk Kim goto recover_xnid; 1602abb2366cSJaegeuk Kim 1603abb2366cSJaegeuk Kim /* Deallocate node address */ 1604abb2366cSJaegeuk Kim get_node_info(sbi, prev_xnid, &ni); 1605abb2366cSJaegeuk Kim f2fs_bug_on(ni.blk_addr == NULL_ADDR); 1606abb2366cSJaegeuk Kim invalidate_blocks(sbi, ni.blk_addr); 1607abb2366cSJaegeuk Kim dec_valid_node_count(sbi, inode); 1608479f40c4SJaegeuk Kim set_node_addr(sbi, &ni, NULL_ADDR, false); 1609abb2366cSJaegeuk Kim 1610abb2366cSJaegeuk Kim recover_xnid: 1611abb2366cSJaegeuk Kim /* 2: allocate new xattr nid */ 1612abb2366cSJaegeuk Kim if (unlikely(!inc_valid_node_count(sbi, inode))) 1613abb2366cSJaegeuk Kim f2fs_bug_on(1); 1614abb2366cSJaegeuk Kim 1615abb2366cSJaegeuk Kim remove_free_nid(NM_I(sbi), new_xnid); 1616abb2366cSJaegeuk Kim get_node_info(sbi, new_xnid, &ni); 1617abb2366cSJaegeuk Kim ni.ino = inode->i_ino; 1618479f40c4SJaegeuk Kim set_node_addr(sbi, &ni, NEW_ADDR, false); 1619abb2366cSJaegeuk Kim F2FS_I(inode)->i_xattr_nid = new_xnid; 1620abb2366cSJaegeuk Kim 1621abb2366cSJaegeuk Kim /* 3: update xattr blkaddr */ 1622abb2366cSJaegeuk Kim refresh_sit_entry(sbi, NEW_ADDR, blkaddr); 1623479f40c4SJaegeuk Kim set_node_addr(sbi, &ni, blkaddr, false); 1624abb2366cSJaegeuk Kim 1625abb2366cSJaegeuk Kim update_inode_page(inode); 1626abb2366cSJaegeuk Kim return true; 1627abb2366cSJaegeuk Kim } 1628abb2366cSJaegeuk Kim 1629e05df3b1SJaegeuk Kim int recover_inode_page(struct f2fs_sb_info *sbi, struct page *page) 1630e05df3b1SJaegeuk Kim { 163158bfaf44SJaegeuk Kim struct f2fs_inode *src, *dst; 1632e05df3b1SJaegeuk Kim nid_t ino = ino_of_node(page); 1633e05df3b1SJaegeuk Kim struct node_info old_ni, new_ni; 1634e05df3b1SJaegeuk Kim struct page *ipage; 1635e05df3b1SJaegeuk Kim 1636e8271fa3SJaegeuk Kim get_node_info(sbi, ino, &old_ni); 1637e8271fa3SJaegeuk Kim 1638e8271fa3SJaegeuk Kim if (unlikely(old_ni.blk_addr != NULL_ADDR)) 1639e8271fa3SJaegeuk Kim return -EINVAL; 1640e8271fa3SJaegeuk Kim 16414ef51a8fSJaegeuk Kim ipage = grab_cache_page(NODE_MAPPING(sbi), ino); 1642e05df3b1SJaegeuk Kim if (!ipage) 1643e05df3b1SJaegeuk Kim return -ENOMEM; 1644e05df3b1SJaegeuk Kim 1645e05df3b1SJaegeuk Kim /* Should not use this inode from free nid list */ 1646e05df3b1SJaegeuk Kim remove_free_nid(NM_I(sbi), ino); 1647e05df3b1SJaegeuk Kim 1648e05df3b1SJaegeuk Kim SetPageUptodate(ipage); 1649e05df3b1SJaegeuk Kim fill_node_footer(ipage, ino, ino, 0, true); 1650e05df3b1SJaegeuk Kim 165158bfaf44SJaegeuk Kim src = F2FS_INODE(page); 165258bfaf44SJaegeuk Kim dst = F2FS_INODE(ipage); 1653e05df3b1SJaegeuk Kim 165458bfaf44SJaegeuk Kim memcpy(dst, src, (unsigned long)&src->i_ext - (unsigned long)src); 165558bfaf44SJaegeuk Kim dst->i_size = 0; 165658bfaf44SJaegeuk Kim dst->i_blocks = cpu_to_le64(1); 165758bfaf44SJaegeuk Kim dst->i_links = cpu_to_le32(1); 165858bfaf44SJaegeuk Kim dst->i_xattr_nid = 0; 1659e05df3b1SJaegeuk Kim 1660e05df3b1SJaegeuk Kim new_ni = old_ni; 1661e05df3b1SJaegeuk Kim new_ni.ino = ino; 1662e05df3b1SJaegeuk Kim 1663cfb271d4SChao Yu if (unlikely(!inc_valid_node_count(sbi, NULL))) 166465e5cd0aSJaegeuk Kim WARN_ON(1); 1665479f40c4SJaegeuk Kim set_node_addr(sbi, &new_ni, NEW_ADDR, false); 1666e05df3b1SJaegeuk Kim inc_valid_inode_count(sbi); 1667e05df3b1SJaegeuk Kim f2fs_put_page(ipage, 1); 1668e05df3b1SJaegeuk Kim return 0; 1669e05df3b1SJaegeuk Kim } 1670e05df3b1SJaegeuk Kim 16719af0ff1cSChao Yu /* 16729af0ff1cSChao Yu * ra_sum_pages() merge contiguous pages into one bio and submit. 1673bac4eef6SChao Yu * these pre-readed pages are alloced in bd_inode's mapping tree. 16749af0ff1cSChao Yu */ 1675bac4eef6SChao Yu static int ra_sum_pages(struct f2fs_sb_info *sbi, struct page **pages, 16769af0ff1cSChao Yu int start, int nrpages) 16779af0ff1cSChao Yu { 1678bac4eef6SChao Yu struct inode *inode = sbi->sb->s_bdev->bd_inode; 1679bac4eef6SChao Yu struct address_space *mapping = inode->i_mapping; 1680bac4eef6SChao Yu int i, page_idx = start; 1681458e6197SJaegeuk Kim struct f2fs_io_info fio = { 1682458e6197SJaegeuk Kim .type = META, 16837e8f2308SGu Zheng .rw = READ_SYNC | REQ_META | REQ_PRIO 1684458e6197SJaegeuk Kim }; 16859af0ff1cSChao Yu 1686bac4eef6SChao Yu for (i = 0; page_idx < start + nrpages; page_idx++, i++) { 1687bac4eef6SChao Yu /* alloc page in bd_inode for reading node summary info */ 1688bac4eef6SChao Yu pages[i] = grab_cache_page(mapping, page_idx); 1689bac4eef6SChao Yu if (!pages[i]) 1690d653788aSGu Zheng break; 1691bac4eef6SChao Yu f2fs_submit_page_mbio(sbi, pages[i], page_idx, &fio); 16929af0ff1cSChao Yu } 16939af0ff1cSChao Yu 1694458e6197SJaegeuk Kim f2fs_submit_merged_bio(sbi, META, READ); 1695bac4eef6SChao Yu return i; 16969af0ff1cSChao Yu } 16979af0ff1cSChao Yu 1698e05df3b1SJaegeuk Kim int restore_node_summary(struct f2fs_sb_info *sbi, 1699e05df3b1SJaegeuk Kim unsigned int segno, struct f2fs_summary_block *sum) 1700e05df3b1SJaegeuk Kim { 1701e05df3b1SJaegeuk Kim struct f2fs_node *rn; 1702e05df3b1SJaegeuk Kim struct f2fs_summary *sum_entry; 1703bac4eef6SChao Yu struct inode *inode = sbi->sb->s_bdev->bd_inode; 1704e05df3b1SJaegeuk Kim block_t addr; 17059af0ff1cSChao Yu int bio_blocks = MAX_BIO_BLOCKS(max_hw_blocks(sbi)); 1706bac4eef6SChao Yu struct page *pages[bio_blocks]; 1707bac4eef6SChao Yu int i, idx, last_offset, nrpages, err = 0; 1708e05df3b1SJaegeuk Kim 1709e05df3b1SJaegeuk Kim /* scan the node segment */ 1710e05df3b1SJaegeuk Kim last_offset = sbi->blocks_per_seg; 1711e05df3b1SJaegeuk Kim addr = START_BLOCK(sbi, segno); 1712e05df3b1SJaegeuk Kim sum_entry = &sum->entries[0]; 1713e05df3b1SJaegeuk Kim 1714d653788aSGu Zheng for (i = 0; !err && i < last_offset; i += nrpages, addr += nrpages) { 17159af0ff1cSChao Yu nrpages = min(last_offset - i, bio_blocks); 1716393ff91fSJaegeuk Kim 17179af0ff1cSChao Yu /* read ahead node pages */ 1718bac4eef6SChao Yu nrpages = ra_sum_pages(sbi, pages, addr, nrpages); 1719d653788aSGu Zheng if (!nrpages) 1720d653788aSGu Zheng return -ENOMEM; 17219af0ff1cSChao Yu 1722bac4eef6SChao Yu for (idx = 0; idx < nrpages; idx++) { 1723d653788aSGu Zheng if (err) 1724d653788aSGu Zheng goto skip; 1725393ff91fSJaegeuk Kim 1726bac4eef6SChao Yu lock_page(pages[idx]); 1727bac4eef6SChao Yu if (unlikely(!PageUptodate(pages[idx]))) { 17286bacf52fSJaegeuk Kim err = -EIO; 17296bacf52fSJaegeuk Kim } else { 1730bac4eef6SChao Yu rn = F2FS_NODE(pages[idx]); 1731393ff91fSJaegeuk Kim sum_entry->nid = rn->footer.nid; 1732393ff91fSJaegeuk Kim sum_entry->version = 0; 1733393ff91fSJaegeuk Kim sum_entry->ofs_in_node = 0; 17349af0ff1cSChao Yu sum_entry++; 1735e05df3b1SJaegeuk Kim } 1736bac4eef6SChao Yu unlock_page(pages[idx]); 1737d653788aSGu Zheng skip: 1738bac4eef6SChao Yu page_cache_release(pages[idx]); 17399af0ff1cSChao Yu } 1740bac4eef6SChao Yu 1741bac4eef6SChao Yu invalidate_mapping_pages(inode->i_mapping, addr, 1742bac4eef6SChao Yu addr + nrpages); 17439af0ff1cSChao Yu } 17449af0ff1cSChao Yu return err; 1745e05df3b1SJaegeuk Kim } 1746e05df3b1SJaegeuk Kim 1747e05df3b1SJaegeuk Kim static bool flush_nats_in_journal(struct f2fs_sb_info *sbi) 1748e05df3b1SJaegeuk Kim { 1749e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1750e05df3b1SJaegeuk Kim struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); 1751e05df3b1SJaegeuk Kim struct f2fs_summary_block *sum = curseg->sum_blk; 1752e05df3b1SJaegeuk Kim int i; 1753e05df3b1SJaegeuk Kim 1754e05df3b1SJaegeuk Kim mutex_lock(&curseg->curseg_mutex); 1755e05df3b1SJaegeuk Kim 1756e05df3b1SJaegeuk Kim if (nats_in_cursum(sum) < NAT_JOURNAL_ENTRIES) { 1757e05df3b1SJaegeuk Kim mutex_unlock(&curseg->curseg_mutex); 1758e05df3b1SJaegeuk Kim return false; 1759e05df3b1SJaegeuk Kim } 1760e05df3b1SJaegeuk Kim 1761e05df3b1SJaegeuk Kim for (i = 0; i < nats_in_cursum(sum); i++) { 1762e05df3b1SJaegeuk Kim struct nat_entry *ne; 1763e05df3b1SJaegeuk Kim struct f2fs_nat_entry raw_ne; 1764e05df3b1SJaegeuk Kim nid_t nid = le32_to_cpu(nid_in_journal(sum, i)); 1765e05df3b1SJaegeuk Kim 1766e05df3b1SJaegeuk Kim raw_ne = nat_in_journal(sum, i); 1767e05df3b1SJaegeuk Kim retry: 1768e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 1769e05df3b1SJaegeuk Kim ne = __lookup_nat_cache(nm_i, nid); 1770e05df3b1SJaegeuk Kim if (ne) { 1771e05df3b1SJaegeuk Kim __set_nat_cache_dirty(nm_i, ne); 1772e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 1773e05df3b1SJaegeuk Kim continue; 1774e05df3b1SJaegeuk Kim } 1775e05df3b1SJaegeuk Kim ne = grab_nat_entry(nm_i, nid); 1776e05df3b1SJaegeuk Kim if (!ne) { 1777e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 1778e05df3b1SJaegeuk Kim goto retry; 1779e05df3b1SJaegeuk Kim } 178094dac22eSChao Yu node_info_from_raw_nat(&ne->ni, &raw_ne); 1781e05df3b1SJaegeuk Kim __set_nat_cache_dirty(nm_i, ne); 1782e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 1783e05df3b1SJaegeuk Kim } 1784e05df3b1SJaegeuk Kim update_nats_in_cursum(sum, -i); 1785e05df3b1SJaegeuk Kim mutex_unlock(&curseg->curseg_mutex); 1786e05df3b1SJaegeuk Kim return true; 1787e05df3b1SJaegeuk Kim } 1788e05df3b1SJaegeuk Kim 17890a8165d7SJaegeuk Kim /* 1790e05df3b1SJaegeuk Kim * This function is called during the checkpointing process. 1791e05df3b1SJaegeuk Kim */ 1792e05df3b1SJaegeuk Kim void flush_nat_entries(struct f2fs_sb_info *sbi) 1793e05df3b1SJaegeuk Kim { 1794e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1795e05df3b1SJaegeuk Kim struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); 1796e05df3b1SJaegeuk Kim struct f2fs_summary_block *sum = curseg->sum_blk; 17972d7b822aSChao Yu struct nat_entry *ne, *cur; 1798e05df3b1SJaegeuk Kim struct page *page = NULL; 1799e05df3b1SJaegeuk Kim struct f2fs_nat_block *nat_blk = NULL; 1800e05df3b1SJaegeuk Kim nid_t start_nid = 0, end_nid = 0; 1801e05df3b1SJaegeuk Kim bool flushed; 1802e05df3b1SJaegeuk Kim 1803e05df3b1SJaegeuk Kim flushed = flush_nats_in_journal(sbi); 1804e05df3b1SJaegeuk Kim 1805e05df3b1SJaegeuk Kim if (!flushed) 1806e05df3b1SJaegeuk Kim mutex_lock(&curseg->curseg_mutex); 1807e05df3b1SJaegeuk Kim 1808e05df3b1SJaegeuk Kim /* 1) flush dirty nat caches */ 18092d7b822aSChao Yu list_for_each_entry_safe(ne, cur, &nm_i->dirty_nat_entries, list) { 1810e05df3b1SJaegeuk Kim nid_t nid; 1811e05df3b1SJaegeuk Kim struct f2fs_nat_entry raw_ne; 1812e05df3b1SJaegeuk Kim int offset = -1; 1813e05df3b1SJaegeuk Kim 1814e05df3b1SJaegeuk Kim if (nat_get_blkaddr(ne) == NEW_ADDR) 1815e05df3b1SJaegeuk Kim continue; 18162d7b822aSChao Yu 18172d7b822aSChao Yu nid = nat_get_nid(ne); 18182d7b822aSChao Yu 1819e05df3b1SJaegeuk Kim if (flushed) 1820e05df3b1SJaegeuk Kim goto to_nat_page; 1821e05df3b1SJaegeuk Kim 1822e05df3b1SJaegeuk Kim /* if there is room for nat enries in curseg->sumpage */ 1823e05df3b1SJaegeuk Kim offset = lookup_journal_in_cursum(sum, NAT_JOURNAL, nid, 1); 1824e05df3b1SJaegeuk Kim if (offset >= 0) { 1825e05df3b1SJaegeuk Kim raw_ne = nat_in_journal(sum, offset); 1826e05df3b1SJaegeuk Kim goto flush_now; 1827e05df3b1SJaegeuk Kim } 1828e05df3b1SJaegeuk Kim to_nat_page: 1829e05df3b1SJaegeuk Kim if (!page || (start_nid > nid || nid > end_nid)) { 1830e05df3b1SJaegeuk Kim if (page) { 1831e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 1832e05df3b1SJaegeuk Kim page = NULL; 1833e05df3b1SJaegeuk Kim } 1834e05df3b1SJaegeuk Kim start_nid = START_NID(nid); 1835e05df3b1SJaegeuk Kim end_nid = start_nid + NAT_ENTRY_PER_BLOCK - 1; 1836e05df3b1SJaegeuk Kim 1837e05df3b1SJaegeuk Kim /* 1838e05df3b1SJaegeuk Kim * get nat block with dirty flag, increased reference 1839e05df3b1SJaegeuk Kim * count, mapped and lock 1840e05df3b1SJaegeuk Kim */ 1841e05df3b1SJaegeuk Kim page = get_next_nat_page(sbi, start_nid); 1842e05df3b1SJaegeuk Kim nat_blk = page_address(page); 1843e05df3b1SJaegeuk Kim } 1844e05df3b1SJaegeuk Kim 18455d56b671SJaegeuk Kim f2fs_bug_on(!nat_blk); 1846e05df3b1SJaegeuk Kim raw_ne = nat_blk->entries[nid - start_nid]; 1847e05df3b1SJaegeuk Kim flush_now: 184894dac22eSChao Yu raw_nat_from_node_info(&raw_ne, &ne->ni); 1849e05df3b1SJaegeuk Kim 1850e05df3b1SJaegeuk Kim if (offset < 0) { 1851e05df3b1SJaegeuk Kim nat_blk->entries[nid - start_nid] = raw_ne; 1852e05df3b1SJaegeuk Kim } else { 1853e05df3b1SJaegeuk Kim nat_in_journal(sum, offset) = raw_ne; 1854e05df3b1SJaegeuk Kim nid_in_journal(sum, offset) = cpu_to_le32(nid); 1855e05df3b1SJaegeuk Kim } 1856e05df3b1SJaegeuk Kim 1857fa372417SJaegeuk Kim if (nat_get_blkaddr(ne) == NULL_ADDR && 18586fb03f3aSJaegeuk Kim add_free_nid(sbi, nid, false) <= 0) { 1859e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 1860e05df3b1SJaegeuk Kim __del_from_nat_cache(nm_i, ne); 1861e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 1862e05df3b1SJaegeuk Kim } else { 1863e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 1864e05df3b1SJaegeuk Kim __clear_nat_cache_dirty(nm_i, ne); 1865e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 1866e05df3b1SJaegeuk Kim } 1867e05df3b1SJaegeuk Kim } 1868e05df3b1SJaegeuk Kim if (!flushed) 1869e05df3b1SJaegeuk Kim mutex_unlock(&curseg->curseg_mutex); 1870e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 1871e05df3b1SJaegeuk Kim } 1872e05df3b1SJaegeuk Kim 1873e05df3b1SJaegeuk Kim static int init_node_manager(struct f2fs_sb_info *sbi) 1874e05df3b1SJaegeuk Kim { 1875e05df3b1SJaegeuk Kim struct f2fs_super_block *sb_raw = F2FS_RAW_SUPER(sbi); 1876e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1877e05df3b1SJaegeuk Kim unsigned char *version_bitmap; 1878e05df3b1SJaegeuk Kim unsigned int nat_segs, nat_blocks; 1879e05df3b1SJaegeuk Kim 1880e05df3b1SJaegeuk Kim nm_i->nat_blkaddr = le32_to_cpu(sb_raw->nat_blkaddr); 1881e05df3b1SJaegeuk Kim 1882e05df3b1SJaegeuk Kim /* segment_count_nat includes pair segment so divide to 2. */ 1883e05df3b1SJaegeuk Kim nat_segs = le32_to_cpu(sb_raw->segment_count_nat) >> 1; 1884e05df3b1SJaegeuk Kim nat_blocks = nat_segs << le32_to_cpu(sb_raw->log_blocks_per_seg); 1885b63da15eSJaegeuk Kim 18867ee0eeabSJaegeuk Kim nm_i->max_nid = NAT_ENTRY_PER_BLOCK * nat_blocks; 18877ee0eeabSJaegeuk Kim 1888b63da15eSJaegeuk Kim /* not used nids: 0, node, meta, (and root counted as valid node) */ 18897ee0eeabSJaegeuk Kim nm_i->available_nids = nm_i->max_nid - 3; 1890e05df3b1SJaegeuk Kim nm_i->fcnt = 0; 1891e05df3b1SJaegeuk Kim nm_i->nat_cnt = 0; 1892cdfc41c1SJaegeuk Kim nm_i->ram_thresh = DEF_RAM_THRESHOLD; 1893e05df3b1SJaegeuk Kim 18948a7ed66aSJaegeuk Kim INIT_RADIX_TREE(&nm_i->free_nid_root, GFP_ATOMIC); 1895e05df3b1SJaegeuk Kim INIT_LIST_HEAD(&nm_i->free_nid_list); 1896e05df3b1SJaegeuk Kim INIT_RADIX_TREE(&nm_i->nat_root, GFP_ATOMIC); 1897e05df3b1SJaegeuk Kim INIT_LIST_HEAD(&nm_i->nat_entries); 1898e05df3b1SJaegeuk Kim INIT_LIST_HEAD(&nm_i->dirty_nat_entries); 1899e05df3b1SJaegeuk Kim 1900e05df3b1SJaegeuk Kim mutex_init(&nm_i->build_lock); 1901e05df3b1SJaegeuk Kim spin_lock_init(&nm_i->free_nid_list_lock); 1902e05df3b1SJaegeuk Kim rwlock_init(&nm_i->nat_tree_lock); 1903e05df3b1SJaegeuk Kim 1904e05df3b1SJaegeuk Kim nm_i->next_scan_nid = le32_to_cpu(sbi->ckpt->next_free_nid); 190579b5793bSAlexandru Gheorghiu nm_i->bitmap_size = __bitmap_size(sbi, NAT_BITMAP); 1906e05df3b1SJaegeuk Kim version_bitmap = __bitmap_ptr(sbi, NAT_BITMAP); 1907e05df3b1SJaegeuk Kim if (!version_bitmap) 1908e05df3b1SJaegeuk Kim return -EFAULT; 1909e05df3b1SJaegeuk Kim 191079b5793bSAlexandru Gheorghiu nm_i->nat_bitmap = kmemdup(version_bitmap, nm_i->bitmap_size, 191179b5793bSAlexandru Gheorghiu GFP_KERNEL); 191279b5793bSAlexandru Gheorghiu if (!nm_i->nat_bitmap) 191379b5793bSAlexandru Gheorghiu return -ENOMEM; 1914e05df3b1SJaegeuk Kim return 0; 1915e05df3b1SJaegeuk Kim } 1916e05df3b1SJaegeuk Kim 1917e05df3b1SJaegeuk Kim int build_node_manager(struct f2fs_sb_info *sbi) 1918e05df3b1SJaegeuk Kim { 1919e05df3b1SJaegeuk Kim int err; 1920e05df3b1SJaegeuk Kim 1921e05df3b1SJaegeuk Kim sbi->nm_info = kzalloc(sizeof(struct f2fs_nm_info), GFP_KERNEL); 1922e05df3b1SJaegeuk Kim if (!sbi->nm_info) 1923e05df3b1SJaegeuk Kim return -ENOMEM; 1924e05df3b1SJaegeuk Kim 1925e05df3b1SJaegeuk Kim err = init_node_manager(sbi); 1926e05df3b1SJaegeuk Kim if (err) 1927e05df3b1SJaegeuk Kim return err; 1928e05df3b1SJaegeuk Kim 1929e05df3b1SJaegeuk Kim build_free_nids(sbi); 1930e05df3b1SJaegeuk Kim return 0; 1931e05df3b1SJaegeuk Kim } 1932e05df3b1SJaegeuk Kim 1933e05df3b1SJaegeuk Kim void destroy_node_manager(struct f2fs_sb_info *sbi) 1934e05df3b1SJaegeuk Kim { 1935e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1936e05df3b1SJaegeuk Kim struct free_nid *i, *next_i; 1937e05df3b1SJaegeuk Kim struct nat_entry *natvec[NATVEC_SIZE]; 1938e05df3b1SJaegeuk Kim nid_t nid = 0; 1939e05df3b1SJaegeuk Kim unsigned int found; 1940e05df3b1SJaegeuk Kim 1941e05df3b1SJaegeuk Kim if (!nm_i) 1942e05df3b1SJaegeuk Kim return; 1943e05df3b1SJaegeuk Kim 1944e05df3b1SJaegeuk Kim /* destroy free nid list */ 1945e05df3b1SJaegeuk Kim spin_lock(&nm_i->free_nid_list_lock); 1946e05df3b1SJaegeuk Kim list_for_each_entry_safe(i, next_i, &nm_i->free_nid_list, list) { 19475d56b671SJaegeuk Kim f2fs_bug_on(i->state == NID_ALLOC); 19488a7ed66aSJaegeuk Kim __del_from_free_nid_list(nm_i, i); 1949e05df3b1SJaegeuk Kim nm_i->fcnt--; 1950cf0ee0f0SChao Yu spin_unlock(&nm_i->free_nid_list_lock); 1951cf0ee0f0SChao Yu kmem_cache_free(free_nid_slab, i); 1952cf0ee0f0SChao Yu spin_lock(&nm_i->free_nid_list_lock); 1953e05df3b1SJaegeuk Kim } 19545d56b671SJaegeuk Kim f2fs_bug_on(nm_i->fcnt); 1955e05df3b1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1956e05df3b1SJaegeuk Kim 1957e05df3b1SJaegeuk Kim /* destroy nat cache */ 1958e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 1959e05df3b1SJaegeuk Kim while ((found = __gang_lookup_nat_cache(nm_i, 1960e05df3b1SJaegeuk Kim nid, NATVEC_SIZE, natvec))) { 1961e05df3b1SJaegeuk Kim unsigned idx; 1962b6ce391eSGu Zheng nid = nat_get_nid(natvec[found - 1]) + 1; 1963b6ce391eSGu Zheng for (idx = 0; idx < found; idx++) 1964b6ce391eSGu Zheng __del_from_nat_cache(nm_i, natvec[idx]); 1965e05df3b1SJaegeuk Kim } 19665d56b671SJaegeuk Kim f2fs_bug_on(nm_i->nat_cnt); 1967e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 1968e05df3b1SJaegeuk Kim 1969e05df3b1SJaegeuk Kim kfree(nm_i->nat_bitmap); 1970e05df3b1SJaegeuk Kim sbi->nm_info = NULL; 1971e05df3b1SJaegeuk Kim kfree(nm_i); 1972e05df3b1SJaegeuk Kim } 1973e05df3b1SJaegeuk Kim 19746e6093a8SNamjae Jeon int __init create_node_manager_caches(void) 1975e05df3b1SJaegeuk Kim { 1976e05df3b1SJaegeuk Kim nat_entry_slab = f2fs_kmem_cache_create("nat_entry", 1977e8512d2eSGu Zheng sizeof(struct nat_entry)); 1978e05df3b1SJaegeuk Kim if (!nat_entry_slab) 1979e05df3b1SJaegeuk Kim return -ENOMEM; 1980e05df3b1SJaegeuk Kim 1981e05df3b1SJaegeuk Kim free_nid_slab = f2fs_kmem_cache_create("free_nid", 1982e8512d2eSGu Zheng sizeof(struct free_nid)); 1983e05df3b1SJaegeuk Kim if (!free_nid_slab) { 1984e05df3b1SJaegeuk Kim kmem_cache_destroy(nat_entry_slab); 1985e05df3b1SJaegeuk Kim return -ENOMEM; 1986e05df3b1SJaegeuk Kim } 1987e05df3b1SJaegeuk Kim return 0; 1988e05df3b1SJaegeuk Kim } 1989e05df3b1SJaegeuk Kim 1990e05df3b1SJaegeuk Kim void destroy_node_manager_caches(void) 1991e05df3b1SJaegeuk Kim { 1992e05df3b1SJaegeuk Kim kmem_cache_destroy(free_nid_slab); 1993e05df3b1SJaegeuk Kim kmem_cache_destroy(nat_entry_slab); 1994e05df3b1SJaegeuk Kim } 1995