10a8165d7SJaegeuk Kim /* 2e05df3b1SJaegeuk Kim * fs/f2fs/node.c 3e05df3b1SJaegeuk Kim * 4e05df3b1SJaegeuk Kim * Copyright (c) 2012 Samsung Electronics Co., Ltd. 5e05df3b1SJaegeuk Kim * http://www.samsung.com/ 6e05df3b1SJaegeuk Kim * 7e05df3b1SJaegeuk Kim * This program is free software; you can redistribute it and/or modify 8e05df3b1SJaegeuk Kim * it under the terms of the GNU General Public License version 2 as 9e05df3b1SJaegeuk Kim * published by the Free Software Foundation. 10e05df3b1SJaegeuk Kim */ 11e05df3b1SJaegeuk Kim #include <linux/fs.h> 12e05df3b1SJaegeuk Kim #include <linux/f2fs_fs.h> 13e05df3b1SJaegeuk Kim #include <linux/mpage.h> 14e05df3b1SJaegeuk Kim #include <linux/backing-dev.h> 15e05df3b1SJaegeuk Kim #include <linux/blkdev.h> 16e05df3b1SJaegeuk Kim #include <linux/pagevec.h> 17e05df3b1SJaegeuk Kim #include <linux/swap.h> 18e05df3b1SJaegeuk Kim 19e05df3b1SJaegeuk Kim #include "f2fs.h" 20e05df3b1SJaegeuk Kim #include "node.h" 21e05df3b1SJaegeuk Kim #include "segment.h" 2251dd6249SNamjae Jeon #include <trace/events/f2fs.h> 23e05df3b1SJaegeuk Kim 24f978f5a0SGu Zheng #define on_build_free_nids(nmi) mutex_is_locked(&nm_i->build_lock) 25f978f5a0SGu Zheng 26e05df3b1SJaegeuk Kim static struct kmem_cache *nat_entry_slab; 27e05df3b1SJaegeuk Kim static struct kmem_cache *free_nid_slab; 28aec71382SChao Yu static struct kmem_cache *nat_entry_set_slab; 29e05df3b1SJaegeuk Kim 306fb03f3aSJaegeuk Kim bool available_free_memory(struct f2fs_sb_info *sbi, int type) 31cdfc41c1SJaegeuk Kim { 326fb03f3aSJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 33cdfc41c1SJaegeuk Kim struct sysinfo val; 34cdfc41c1SJaegeuk Kim unsigned long mem_size = 0; 356fb03f3aSJaegeuk Kim bool res = false; 36cdfc41c1SJaegeuk Kim 37cdfc41c1SJaegeuk Kim si_meminfo(&val); 386fb03f3aSJaegeuk Kim /* give 25%, 25%, 50% memory for each components respectively */ 396fb03f3aSJaegeuk Kim if (type == FREE_NIDS) { 406fb03f3aSJaegeuk Kim mem_size = (nm_i->fcnt * sizeof(struct free_nid)) >> 12; 416fb03f3aSJaegeuk Kim res = mem_size < ((val.totalram * nm_i->ram_thresh / 100) >> 2); 426fb03f3aSJaegeuk Kim } else if (type == NAT_ENTRIES) { 436fb03f3aSJaegeuk Kim mem_size = (nm_i->nat_cnt * sizeof(struct nat_entry)) >> 12; 446fb03f3aSJaegeuk Kim res = mem_size < ((val.totalram * nm_i->ram_thresh / 100) >> 2); 456fb03f3aSJaegeuk Kim } else if (type == DIRTY_DENTS) { 462743f865SJaegeuk Kim if (sbi->sb->s_bdi->dirty_exceeded) 472743f865SJaegeuk Kim return false; 486fb03f3aSJaegeuk Kim mem_size = get_pages(sbi, F2FS_DIRTY_DENTS); 496fb03f3aSJaegeuk Kim res = mem_size < ((val.totalram * nm_i->ram_thresh / 100) >> 1); 506fb03f3aSJaegeuk Kim } 516fb03f3aSJaegeuk Kim return res; 52cdfc41c1SJaegeuk Kim } 53cdfc41c1SJaegeuk Kim 54e05df3b1SJaegeuk Kim static void clear_node_page_dirty(struct page *page) 55e05df3b1SJaegeuk Kim { 56e05df3b1SJaegeuk Kim struct address_space *mapping = page->mapping; 57e05df3b1SJaegeuk Kim unsigned int long flags; 58e05df3b1SJaegeuk Kim 59e05df3b1SJaegeuk Kim if (PageDirty(page)) { 60e05df3b1SJaegeuk Kim spin_lock_irqsave(&mapping->tree_lock, flags); 61e05df3b1SJaegeuk Kim radix_tree_tag_clear(&mapping->page_tree, 62e05df3b1SJaegeuk Kim page_index(page), 63e05df3b1SJaegeuk Kim PAGECACHE_TAG_DIRTY); 64e05df3b1SJaegeuk Kim spin_unlock_irqrestore(&mapping->tree_lock, flags); 65e05df3b1SJaegeuk Kim 66e05df3b1SJaegeuk Kim clear_page_dirty_for_io(page); 674081363fSJaegeuk Kim dec_page_count(F2FS_M_SB(mapping), F2FS_DIRTY_NODES); 68e05df3b1SJaegeuk Kim } 69e05df3b1SJaegeuk Kim ClearPageUptodate(page); 70e05df3b1SJaegeuk Kim } 71e05df3b1SJaegeuk Kim 72e05df3b1SJaegeuk Kim static struct page *get_current_nat_page(struct f2fs_sb_info *sbi, nid_t nid) 73e05df3b1SJaegeuk Kim { 74e05df3b1SJaegeuk Kim pgoff_t index = current_nat_addr(sbi, nid); 75e05df3b1SJaegeuk Kim return get_meta_page(sbi, index); 76e05df3b1SJaegeuk Kim } 77e05df3b1SJaegeuk Kim 78e05df3b1SJaegeuk Kim static struct page *get_next_nat_page(struct f2fs_sb_info *sbi, nid_t nid) 79e05df3b1SJaegeuk Kim { 80e05df3b1SJaegeuk Kim struct page *src_page; 81e05df3b1SJaegeuk Kim struct page *dst_page; 82e05df3b1SJaegeuk Kim pgoff_t src_off; 83e05df3b1SJaegeuk Kim pgoff_t dst_off; 84e05df3b1SJaegeuk Kim void *src_addr; 85e05df3b1SJaegeuk Kim void *dst_addr; 86e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 87e05df3b1SJaegeuk Kim 88e05df3b1SJaegeuk Kim src_off = current_nat_addr(sbi, nid); 89e05df3b1SJaegeuk Kim dst_off = next_nat_addr(sbi, src_off); 90e05df3b1SJaegeuk Kim 91e05df3b1SJaegeuk Kim /* get current nat block page with lock */ 92e05df3b1SJaegeuk Kim src_page = get_meta_page(sbi, src_off); 93e05df3b1SJaegeuk Kim dst_page = grab_meta_page(sbi, dst_off); 949850cf4aSJaegeuk Kim f2fs_bug_on(sbi, PageDirty(src_page)); 95e05df3b1SJaegeuk Kim 96e05df3b1SJaegeuk Kim src_addr = page_address(src_page); 97e05df3b1SJaegeuk Kim dst_addr = page_address(dst_page); 98e05df3b1SJaegeuk Kim memcpy(dst_addr, src_addr, PAGE_CACHE_SIZE); 99e05df3b1SJaegeuk Kim set_page_dirty(dst_page); 100e05df3b1SJaegeuk Kim f2fs_put_page(src_page, 1); 101e05df3b1SJaegeuk Kim 102e05df3b1SJaegeuk Kim set_to_next_nat(nm_i, nid); 103e05df3b1SJaegeuk Kim 104e05df3b1SJaegeuk Kim return dst_page; 105e05df3b1SJaegeuk Kim } 106e05df3b1SJaegeuk Kim 107e05df3b1SJaegeuk Kim static struct nat_entry *__lookup_nat_cache(struct f2fs_nm_info *nm_i, nid_t n) 108e05df3b1SJaegeuk Kim { 109e05df3b1SJaegeuk Kim return radix_tree_lookup(&nm_i->nat_root, n); 110e05df3b1SJaegeuk Kim } 111e05df3b1SJaegeuk Kim 112e05df3b1SJaegeuk Kim static unsigned int __gang_lookup_nat_cache(struct f2fs_nm_info *nm_i, 113e05df3b1SJaegeuk Kim nid_t start, unsigned int nr, struct nat_entry **ep) 114e05df3b1SJaegeuk Kim { 115e05df3b1SJaegeuk Kim return radix_tree_gang_lookup(&nm_i->nat_root, (void **)ep, start, nr); 116e05df3b1SJaegeuk Kim } 117e05df3b1SJaegeuk Kim 118e05df3b1SJaegeuk Kim static void __del_from_nat_cache(struct f2fs_nm_info *nm_i, struct nat_entry *e) 119e05df3b1SJaegeuk Kim { 120e05df3b1SJaegeuk Kim list_del(&e->list); 121e05df3b1SJaegeuk Kim radix_tree_delete(&nm_i->nat_root, nat_get_nid(e)); 122e05df3b1SJaegeuk Kim nm_i->nat_cnt--; 123e05df3b1SJaegeuk Kim kmem_cache_free(nat_entry_slab, e); 124e05df3b1SJaegeuk Kim } 125e05df3b1SJaegeuk Kim 126e05df3b1SJaegeuk Kim int is_checkpointed_node(struct f2fs_sb_info *sbi, nid_t nid) 127e05df3b1SJaegeuk Kim { 128e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 129e05df3b1SJaegeuk Kim struct nat_entry *e; 130e05df3b1SJaegeuk Kim int is_cp = 1; 131e05df3b1SJaegeuk Kim 132e05df3b1SJaegeuk Kim read_lock(&nm_i->nat_tree_lock); 133e05df3b1SJaegeuk Kim e = __lookup_nat_cache(nm_i, nid); 134e05df3b1SJaegeuk Kim if (e && !e->checkpointed) 135e05df3b1SJaegeuk Kim is_cp = 0; 136e05df3b1SJaegeuk Kim read_unlock(&nm_i->nat_tree_lock); 137e05df3b1SJaegeuk Kim return is_cp; 138e05df3b1SJaegeuk Kim } 139e05df3b1SJaegeuk Kim 140479f40c4SJaegeuk Kim bool fsync_mark_done(struct f2fs_sb_info *sbi, nid_t nid) 141479f40c4SJaegeuk Kim { 142479f40c4SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 143479f40c4SJaegeuk Kim struct nat_entry *e; 144479f40c4SJaegeuk Kim bool fsync_done = false; 145479f40c4SJaegeuk Kim 146479f40c4SJaegeuk Kim read_lock(&nm_i->nat_tree_lock); 147479f40c4SJaegeuk Kim e = __lookup_nat_cache(nm_i, nid); 148479f40c4SJaegeuk Kim if (e) 149479f40c4SJaegeuk Kim fsync_done = e->fsync_done; 150479f40c4SJaegeuk Kim read_unlock(&nm_i->nat_tree_lock); 151479f40c4SJaegeuk Kim return fsync_done; 152479f40c4SJaegeuk Kim } 153479f40c4SJaegeuk Kim 154b6fe5873SJaegeuk Kim void fsync_mark_clear(struct f2fs_sb_info *sbi, nid_t nid) 155b6fe5873SJaegeuk Kim { 156b6fe5873SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 157b6fe5873SJaegeuk Kim struct nat_entry *e; 158b6fe5873SJaegeuk Kim 159b6fe5873SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 160b6fe5873SJaegeuk Kim e = __lookup_nat_cache(nm_i, nid); 161b6fe5873SJaegeuk Kim if (e) 162b6fe5873SJaegeuk Kim e->fsync_done = false; 163b6fe5873SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 164b6fe5873SJaegeuk Kim } 165b6fe5873SJaegeuk Kim 166e05df3b1SJaegeuk Kim static struct nat_entry *grab_nat_entry(struct f2fs_nm_info *nm_i, nid_t nid) 167e05df3b1SJaegeuk Kim { 168e05df3b1SJaegeuk Kim struct nat_entry *new; 169e05df3b1SJaegeuk Kim 170e05df3b1SJaegeuk Kim new = kmem_cache_alloc(nat_entry_slab, GFP_ATOMIC); 171e05df3b1SJaegeuk Kim if (!new) 172e05df3b1SJaegeuk Kim return NULL; 173e05df3b1SJaegeuk Kim if (radix_tree_insert(&nm_i->nat_root, nid, new)) { 174e05df3b1SJaegeuk Kim kmem_cache_free(nat_entry_slab, new); 175e05df3b1SJaegeuk Kim return NULL; 176e05df3b1SJaegeuk Kim } 177e05df3b1SJaegeuk Kim memset(new, 0, sizeof(struct nat_entry)); 178e05df3b1SJaegeuk Kim nat_set_nid(new, nid); 179fffc2a00SJaegeuk Kim new->checkpointed = true; 180e05df3b1SJaegeuk Kim list_add_tail(&new->list, &nm_i->nat_entries); 181e05df3b1SJaegeuk Kim nm_i->nat_cnt++; 182e05df3b1SJaegeuk Kim return new; 183e05df3b1SJaegeuk Kim } 184e05df3b1SJaegeuk Kim 185e05df3b1SJaegeuk Kim static void cache_nat_entry(struct f2fs_nm_info *nm_i, nid_t nid, 186e05df3b1SJaegeuk Kim struct f2fs_nat_entry *ne) 187e05df3b1SJaegeuk Kim { 188e05df3b1SJaegeuk Kim struct nat_entry *e; 189e05df3b1SJaegeuk Kim retry: 190e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 191e05df3b1SJaegeuk Kim e = __lookup_nat_cache(nm_i, nid); 192e05df3b1SJaegeuk Kim if (!e) { 193e05df3b1SJaegeuk Kim e = grab_nat_entry(nm_i, nid); 194e05df3b1SJaegeuk Kim if (!e) { 195e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 196e05df3b1SJaegeuk Kim goto retry; 197e05df3b1SJaegeuk Kim } 19894dac22eSChao Yu node_info_from_raw_nat(&e->ni, ne); 199e05df3b1SJaegeuk Kim } 200e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 201e05df3b1SJaegeuk Kim } 202e05df3b1SJaegeuk Kim 203e05df3b1SJaegeuk Kim static void set_node_addr(struct f2fs_sb_info *sbi, struct node_info *ni, 204479f40c4SJaegeuk Kim block_t new_blkaddr, bool fsync_done) 205e05df3b1SJaegeuk Kim { 206e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 207e05df3b1SJaegeuk Kim struct nat_entry *e; 208e05df3b1SJaegeuk Kim retry: 209e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 210e05df3b1SJaegeuk Kim e = __lookup_nat_cache(nm_i, ni->nid); 211e05df3b1SJaegeuk Kim if (!e) { 212e05df3b1SJaegeuk Kim e = grab_nat_entry(nm_i, ni->nid); 213e05df3b1SJaegeuk Kim if (!e) { 214e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 215e05df3b1SJaegeuk Kim goto retry; 216e05df3b1SJaegeuk Kim } 217e05df3b1SJaegeuk Kim e->ni = *ni; 2189850cf4aSJaegeuk Kim f2fs_bug_on(sbi, ni->blk_addr == NEW_ADDR); 219e05df3b1SJaegeuk Kim } else if (new_blkaddr == NEW_ADDR) { 220e05df3b1SJaegeuk Kim /* 221e05df3b1SJaegeuk Kim * when nid is reallocated, 222e05df3b1SJaegeuk Kim * previous nat entry can be remained in nat cache. 223e05df3b1SJaegeuk Kim * So, reinitialize it with new information. 224e05df3b1SJaegeuk Kim */ 225e05df3b1SJaegeuk Kim e->ni = *ni; 2269850cf4aSJaegeuk Kim f2fs_bug_on(sbi, ni->blk_addr != NULL_ADDR); 227e05df3b1SJaegeuk Kim } 228e05df3b1SJaegeuk Kim 229e05df3b1SJaegeuk Kim /* sanity check */ 2309850cf4aSJaegeuk Kim f2fs_bug_on(sbi, nat_get_blkaddr(e) != ni->blk_addr); 2319850cf4aSJaegeuk Kim f2fs_bug_on(sbi, nat_get_blkaddr(e) == NULL_ADDR && 232e05df3b1SJaegeuk Kim new_blkaddr == NULL_ADDR); 2339850cf4aSJaegeuk Kim f2fs_bug_on(sbi, nat_get_blkaddr(e) == NEW_ADDR && 234e05df3b1SJaegeuk Kim new_blkaddr == NEW_ADDR); 2359850cf4aSJaegeuk Kim f2fs_bug_on(sbi, nat_get_blkaddr(e) != NEW_ADDR && 236e05df3b1SJaegeuk Kim nat_get_blkaddr(e) != NULL_ADDR && 237e05df3b1SJaegeuk Kim new_blkaddr == NEW_ADDR); 238e05df3b1SJaegeuk Kim 239e1c42045Sarter97 /* increment version no as node is removed */ 240e05df3b1SJaegeuk Kim if (nat_get_blkaddr(e) != NEW_ADDR && new_blkaddr == NULL_ADDR) { 241e05df3b1SJaegeuk Kim unsigned char version = nat_get_version(e); 242e05df3b1SJaegeuk Kim nat_set_version(e, inc_node_version(version)); 243e05df3b1SJaegeuk Kim } 244e05df3b1SJaegeuk Kim 245e05df3b1SJaegeuk Kim /* change address */ 246e05df3b1SJaegeuk Kim nat_set_blkaddr(e, new_blkaddr); 247e05df3b1SJaegeuk Kim __set_nat_cache_dirty(nm_i, e); 248479f40c4SJaegeuk Kim 249479f40c4SJaegeuk Kim /* update fsync_mark if its inode nat entry is still alive */ 250479f40c4SJaegeuk Kim e = __lookup_nat_cache(nm_i, ni->ino); 251479f40c4SJaegeuk Kim if (e) 252479f40c4SJaegeuk Kim e->fsync_done = fsync_done; 253e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 254e05df3b1SJaegeuk Kim } 255e05df3b1SJaegeuk Kim 2564660f9c0SJaegeuk Kim int try_to_free_nats(struct f2fs_sb_info *sbi, int nr_shrink) 257e05df3b1SJaegeuk Kim { 258e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 259e05df3b1SJaegeuk Kim 2606fb03f3aSJaegeuk Kim if (available_free_memory(sbi, NAT_ENTRIES)) 261e05df3b1SJaegeuk Kim return 0; 262e05df3b1SJaegeuk Kim 263e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 264e05df3b1SJaegeuk Kim while (nr_shrink && !list_empty(&nm_i->nat_entries)) { 265e05df3b1SJaegeuk Kim struct nat_entry *ne; 266e05df3b1SJaegeuk Kim ne = list_first_entry(&nm_i->nat_entries, 267e05df3b1SJaegeuk Kim struct nat_entry, list); 268e05df3b1SJaegeuk Kim __del_from_nat_cache(nm_i, ne); 269e05df3b1SJaegeuk Kim nr_shrink--; 270e05df3b1SJaegeuk Kim } 271e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 272e05df3b1SJaegeuk Kim return nr_shrink; 273e05df3b1SJaegeuk Kim } 274e05df3b1SJaegeuk Kim 2750a8165d7SJaegeuk Kim /* 276e1c42045Sarter97 * This function always returns success 277e05df3b1SJaegeuk Kim */ 278e05df3b1SJaegeuk Kim void get_node_info(struct f2fs_sb_info *sbi, nid_t nid, struct node_info *ni) 279e05df3b1SJaegeuk Kim { 280e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 281e05df3b1SJaegeuk Kim struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); 282e05df3b1SJaegeuk Kim struct f2fs_summary_block *sum = curseg->sum_blk; 283e05df3b1SJaegeuk Kim nid_t start_nid = START_NID(nid); 284e05df3b1SJaegeuk Kim struct f2fs_nat_block *nat_blk; 285e05df3b1SJaegeuk Kim struct page *page = NULL; 286e05df3b1SJaegeuk Kim struct f2fs_nat_entry ne; 287e05df3b1SJaegeuk Kim struct nat_entry *e; 288e05df3b1SJaegeuk Kim int i; 289e05df3b1SJaegeuk Kim 290be4124f8SNamjae Jeon memset(&ne, 0, sizeof(struct f2fs_nat_entry)); 291e05df3b1SJaegeuk Kim ni->nid = nid; 292e05df3b1SJaegeuk Kim 293e05df3b1SJaegeuk Kim /* Check nat cache */ 294e05df3b1SJaegeuk Kim read_lock(&nm_i->nat_tree_lock); 295e05df3b1SJaegeuk Kim e = __lookup_nat_cache(nm_i, nid); 296e05df3b1SJaegeuk Kim if (e) { 297e05df3b1SJaegeuk Kim ni->ino = nat_get_ino(e); 298e05df3b1SJaegeuk Kim ni->blk_addr = nat_get_blkaddr(e); 299e05df3b1SJaegeuk Kim ni->version = nat_get_version(e); 300e05df3b1SJaegeuk Kim } 301e05df3b1SJaegeuk Kim read_unlock(&nm_i->nat_tree_lock); 302e05df3b1SJaegeuk Kim if (e) 303e05df3b1SJaegeuk Kim return; 304e05df3b1SJaegeuk Kim 305e05df3b1SJaegeuk Kim /* Check current segment summary */ 306e05df3b1SJaegeuk Kim mutex_lock(&curseg->curseg_mutex); 307e05df3b1SJaegeuk Kim i = lookup_journal_in_cursum(sum, NAT_JOURNAL, nid, 0); 308e05df3b1SJaegeuk Kim if (i >= 0) { 309e05df3b1SJaegeuk Kim ne = nat_in_journal(sum, i); 310e05df3b1SJaegeuk Kim node_info_from_raw_nat(ni, &ne); 311e05df3b1SJaegeuk Kim } 312e05df3b1SJaegeuk Kim mutex_unlock(&curseg->curseg_mutex); 313e05df3b1SJaegeuk Kim if (i >= 0) 314e05df3b1SJaegeuk Kim goto cache; 315e05df3b1SJaegeuk Kim 316e05df3b1SJaegeuk Kim /* Fill node_info from nat page */ 317e05df3b1SJaegeuk Kim page = get_current_nat_page(sbi, start_nid); 318e05df3b1SJaegeuk Kim nat_blk = (struct f2fs_nat_block *)page_address(page); 319e05df3b1SJaegeuk Kim ne = nat_blk->entries[nid - start_nid]; 320e05df3b1SJaegeuk Kim node_info_from_raw_nat(ni, &ne); 321e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 322e05df3b1SJaegeuk Kim cache: 323e05df3b1SJaegeuk Kim /* cache nat entry */ 324e05df3b1SJaegeuk Kim cache_nat_entry(NM_I(sbi), nid, &ne); 325e05df3b1SJaegeuk Kim } 326e05df3b1SJaegeuk Kim 3270a8165d7SJaegeuk Kim /* 328e05df3b1SJaegeuk Kim * The maximum depth is four. 329e05df3b1SJaegeuk Kim * Offset[0] will have raw inode offset. 330e05df3b1SJaegeuk Kim */ 331de93653fSJaegeuk Kim static int get_node_path(struct f2fs_inode_info *fi, long block, 332de93653fSJaegeuk Kim int offset[4], unsigned int noffset[4]) 333e05df3b1SJaegeuk Kim { 334de93653fSJaegeuk Kim const long direct_index = ADDRS_PER_INODE(fi); 335e05df3b1SJaegeuk Kim const long direct_blks = ADDRS_PER_BLOCK; 336e05df3b1SJaegeuk Kim const long dptrs_per_blk = NIDS_PER_BLOCK; 337e05df3b1SJaegeuk Kim const long indirect_blks = ADDRS_PER_BLOCK * NIDS_PER_BLOCK; 338e05df3b1SJaegeuk Kim const long dindirect_blks = indirect_blks * NIDS_PER_BLOCK; 339e05df3b1SJaegeuk Kim int n = 0; 340e05df3b1SJaegeuk Kim int level = 0; 341e05df3b1SJaegeuk Kim 342e05df3b1SJaegeuk Kim noffset[0] = 0; 343e05df3b1SJaegeuk Kim 344e05df3b1SJaegeuk Kim if (block < direct_index) { 34525c0a6e5SNamjae Jeon offset[n] = block; 346e05df3b1SJaegeuk Kim goto got; 347e05df3b1SJaegeuk Kim } 348e05df3b1SJaegeuk Kim block -= direct_index; 349e05df3b1SJaegeuk Kim if (block < direct_blks) { 350e05df3b1SJaegeuk Kim offset[n++] = NODE_DIR1_BLOCK; 351e05df3b1SJaegeuk Kim noffset[n] = 1; 35225c0a6e5SNamjae Jeon offset[n] = block; 353e05df3b1SJaegeuk Kim level = 1; 354e05df3b1SJaegeuk Kim goto got; 355e05df3b1SJaegeuk Kim } 356e05df3b1SJaegeuk Kim block -= direct_blks; 357e05df3b1SJaegeuk Kim if (block < direct_blks) { 358e05df3b1SJaegeuk Kim offset[n++] = NODE_DIR2_BLOCK; 359e05df3b1SJaegeuk Kim noffset[n] = 2; 36025c0a6e5SNamjae Jeon offset[n] = block; 361e05df3b1SJaegeuk Kim level = 1; 362e05df3b1SJaegeuk Kim goto got; 363e05df3b1SJaegeuk Kim } 364e05df3b1SJaegeuk Kim block -= direct_blks; 365e05df3b1SJaegeuk Kim if (block < indirect_blks) { 366e05df3b1SJaegeuk Kim offset[n++] = NODE_IND1_BLOCK; 367e05df3b1SJaegeuk Kim noffset[n] = 3; 368e05df3b1SJaegeuk Kim offset[n++] = block / direct_blks; 369e05df3b1SJaegeuk Kim noffset[n] = 4 + offset[n - 1]; 37025c0a6e5SNamjae Jeon offset[n] = block % direct_blks; 371e05df3b1SJaegeuk Kim level = 2; 372e05df3b1SJaegeuk Kim goto got; 373e05df3b1SJaegeuk Kim } 374e05df3b1SJaegeuk Kim block -= indirect_blks; 375e05df3b1SJaegeuk Kim if (block < indirect_blks) { 376e05df3b1SJaegeuk Kim offset[n++] = NODE_IND2_BLOCK; 377e05df3b1SJaegeuk Kim noffset[n] = 4 + dptrs_per_blk; 378e05df3b1SJaegeuk Kim offset[n++] = block / direct_blks; 379e05df3b1SJaegeuk Kim noffset[n] = 5 + dptrs_per_blk + offset[n - 1]; 38025c0a6e5SNamjae Jeon offset[n] = block % direct_blks; 381e05df3b1SJaegeuk Kim level = 2; 382e05df3b1SJaegeuk Kim goto got; 383e05df3b1SJaegeuk Kim } 384e05df3b1SJaegeuk Kim block -= indirect_blks; 385e05df3b1SJaegeuk Kim if (block < dindirect_blks) { 386e05df3b1SJaegeuk Kim offset[n++] = NODE_DIND_BLOCK; 387e05df3b1SJaegeuk Kim noffset[n] = 5 + (dptrs_per_blk * 2); 388e05df3b1SJaegeuk Kim offset[n++] = block / indirect_blks; 389e05df3b1SJaegeuk Kim noffset[n] = 6 + (dptrs_per_blk * 2) + 390e05df3b1SJaegeuk Kim offset[n - 1] * (dptrs_per_blk + 1); 391e05df3b1SJaegeuk Kim offset[n++] = (block / direct_blks) % dptrs_per_blk; 392e05df3b1SJaegeuk Kim noffset[n] = 7 + (dptrs_per_blk * 2) + 393e05df3b1SJaegeuk Kim offset[n - 2] * (dptrs_per_blk + 1) + 394e05df3b1SJaegeuk Kim offset[n - 1]; 39525c0a6e5SNamjae Jeon offset[n] = block % direct_blks; 396e05df3b1SJaegeuk Kim level = 3; 397e05df3b1SJaegeuk Kim goto got; 398e05df3b1SJaegeuk Kim } else { 399e05df3b1SJaegeuk Kim BUG(); 400e05df3b1SJaegeuk Kim } 401e05df3b1SJaegeuk Kim got: 402e05df3b1SJaegeuk Kim return level; 403e05df3b1SJaegeuk Kim } 404e05df3b1SJaegeuk Kim 405e05df3b1SJaegeuk Kim /* 406e05df3b1SJaegeuk Kim * Caller should call f2fs_put_dnode(dn). 4074f4124d0SChao Yu * Also, it should grab and release a rwsem by calling f2fs_lock_op() and 4084f4124d0SChao Yu * f2fs_unlock_op() only if ro is not set RDONLY_NODE. 40939936837SJaegeuk Kim * In the case of RDONLY_NODE, we don't need to care about mutex. 410e05df3b1SJaegeuk Kim */ 411266e97a8SJaegeuk Kim int get_dnode_of_data(struct dnode_of_data *dn, pgoff_t index, int mode) 412e05df3b1SJaegeuk Kim { 4134081363fSJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); 414e05df3b1SJaegeuk Kim struct page *npage[4]; 415e05df3b1SJaegeuk Kim struct page *parent; 416e05df3b1SJaegeuk Kim int offset[4]; 417e05df3b1SJaegeuk Kim unsigned int noffset[4]; 418e05df3b1SJaegeuk Kim nid_t nids[4]; 419e05df3b1SJaegeuk Kim int level, i; 420e05df3b1SJaegeuk Kim int err = 0; 421e05df3b1SJaegeuk Kim 422de93653fSJaegeuk Kim level = get_node_path(F2FS_I(dn->inode), index, offset, noffset); 423e05df3b1SJaegeuk Kim 424e05df3b1SJaegeuk Kim nids[0] = dn->inode->i_ino; 4251646cfacSJaegeuk Kim npage[0] = dn->inode_page; 4261646cfacSJaegeuk Kim 4271646cfacSJaegeuk Kim if (!npage[0]) { 428e05df3b1SJaegeuk Kim npage[0] = get_node_page(sbi, nids[0]); 429e05df3b1SJaegeuk Kim if (IS_ERR(npage[0])) 430e05df3b1SJaegeuk Kim return PTR_ERR(npage[0]); 4311646cfacSJaegeuk Kim } 432e05df3b1SJaegeuk Kim parent = npage[0]; 43352c2db3fSChangman Lee if (level != 0) 434e05df3b1SJaegeuk Kim nids[1] = get_nid(parent, offset[0], true); 435e05df3b1SJaegeuk Kim dn->inode_page = npage[0]; 436e05df3b1SJaegeuk Kim dn->inode_page_locked = true; 437e05df3b1SJaegeuk Kim 438e05df3b1SJaegeuk Kim /* get indirect or direct nodes */ 439e05df3b1SJaegeuk Kim for (i = 1; i <= level; i++) { 440e05df3b1SJaegeuk Kim bool done = false; 441e05df3b1SJaegeuk Kim 442266e97a8SJaegeuk Kim if (!nids[i] && mode == ALLOC_NODE) { 443e05df3b1SJaegeuk Kim /* alloc new node */ 444e05df3b1SJaegeuk Kim if (!alloc_nid(sbi, &(nids[i]))) { 445e05df3b1SJaegeuk Kim err = -ENOSPC; 446e05df3b1SJaegeuk Kim goto release_pages; 447e05df3b1SJaegeuk Kim } 448e05df3b1SJaegeuk Kim 449e05df3b1SJaegeuk Kim dn->nid = nids[i]; 4508ae8f162SJaegeuk Kim npage[i] = new_node_page(dn, noffset[i], NULL); 451e05df3b1SJaegeuk Kim if (IS_ERR(npage[i])) { 452e05df3b1SJaegeuk Kim alloc_nid_failed(sbi, nids[i]); 453e05df3b1SJaegeuk Kim err = PTR_ERR(npage[i]); 454e05df3b1SJaegeuk Kim goto release_pages; 455e05df3b1SJaegeuk Kim } 456e05df3b1SJaegeuk Kim 457e05df3b1SJaegeuk Kim set_nid(parent, offset[i - 1], nids[i], i == 1); 458e05df3b1SJaegeuk Kim alloc_nid_done(sbi, nids[i]); 459e05df3b1SJaegeuk Kim done = true; 460266e97a8SJaegeuk Kim } else if (mode == LOOKUP_NODE_RA && i == level && level > 1) { 461e05df3b1SJaegeuk Kim npage[i] = get_node_page_ra(parent, offset[i - 1]); 462e05df3b1SJaegeuk Kim if (IS_ERR(npage[i])) { 463e05df3b1SJaegeuk Kim err = PTR_ERR(npage[i]); 464e05df3b1SJaegeuk Kim goto release_pages; 465e05df3b1SJaegeuk Kim } 466e05df3b1SJaegeuk Kim done = true; 467e05df3b1SJaegeuk Kim } 468e05df3b1SJaegeuk Kim if (i == 1) { 469e05df3b1SJaegeuk Kim dn->inode_page_locked = false; 470e05df3b1SJaegeuk Kim unlock_page(parent); 471e05df3b1SJaegeuk Kim } else { 472e05df3b1SJaegeuk Kim f2fs_put_page(parent, 1); 473e05df3b1SJaegeuk Kim } 474e05df3b1SJaegeuk Kim 475e05df3b1SJaegeuk Kim if (!done) { 476e05df3b1SJaegeuk Kim npage[i] = get_node_page(sbi, nids[i]); 477e05df3b1SJaegeuk Kim if (IS_ERR(npage[i])) { 478e05df3b1SJaegeuk Kim err = PTR_ERR(npage[i]); 479e05df3b1SJaegeuk Kim f2fs_put_page(npage[0], 0); 480e05df3b1SJaegeuk Kim goto release_out; 481e05df3b1SJaegeuk Kim } 482e05df3b1SJaegeuk Kim } 483e05df3b1SJaegeuk Kim if (i < level) { 484e05df3b1SJaegeuk Kim parent = npage[i]; 485e05df3b1SJaegeuk Kim nids[i + 1] = get_nid(parent, offset[i], false); 486e05df3b1SJaegeuk Kim } 487e05df3b1SJaegeuk Kim } 488e05df3b1SJaegeuk Kim dn->nid = nids[level]; 489e05df3b1SJaegeuk Kim dn->ofs_in_node = offset[level]; 490e05df3b1SJaegeuk Kim dn->node_page = npage[level]; 491e05df3b1SJaegeuk Kim dn->data_blkaddr = datablock_addr(dn->node_page, dn->ofs_in_node); 492e05df3b1SJaegeuk Kim return 0; 493e05df3b1SJaegeuk Kim 494e05df3b1SJaegeuk Kim release_pages: 495e05df3b1SJaegeuk Kim f2fs_put_page(parent, 1); 496e05df3b1SJaegeuk Kim if (i > 1) 497e05df3b1SJaegeuk Kim f2fs_put_page(npage[0], 0); 498e05df3b1SJaegeuk Kim release_out: 499e05df3b1SJaegeuk Kim dn->inode_page = NULL; 500e05df3b1SJaegeuk Kim dn->node_page = NULL; 501e05df3b1SJaegeuk Kim return err; 502e05df3b1SJaegeuk Kim } 503e05df3b1SJaegeuk Kim 504e05df3b1SJaegeuk Kim static void truncate_node(struct dnode_of_data *dn) 505e05df3b1SJaegeuk Kim { 5064081363fSJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); 507e05df3b1SJaegeuk Kim struct node_info ni; 508e05df3b1SJaegeuk Kim 509e05df3b1SJaegeuk Kim get_node_info(sbi, dn->nid, &ni); 51071e9fec5SJaegeuk Kim if (dn->inode->i_blocks == 0) { 5119850cf4aSJaegeuk Kim f2fs_bug_on(sbi, ni.blk_addr != NULL_ADDR); 51271e9fec5SJaegeuk Kim goto invalidate; 51371e9fec5SJaegeuk Kim } 5149850cf4aSJaegeuk Kim f2fs_bug_on(sbi, ni.blk_addr == NULL_ADDR); 515e05df3b1SJaegeuk Kim 516e05df3b1SJaegeuk Kim /* Deallocate node address */ 51771e9fec5SJaegeuk Kim invalidate_blocks(sbi, ni.blk_addr); 518ef86d709SGu Zheng dec_valid_node_count(sbi, dn->inode); 519479f40c4SJaegeuk Kim set_node_addr(sbi, &ni, NULL_ADDR, false); 520e05df3b1SJaegeuk Kim 521e05df3b1SJaegeuk Kim if (dn->nid == dn->inode->i_ino) { 522e05df3b1SJaegeuk Kim remove_orphan_inode(sbi, dn->nid); 523e05df3b1SJaegeuk Kim dec_valid_inode_count(sbi); 524e05df3b1SJaegeuk Kim } else { 525e05df3b1SJaegeuk Kim sync_inode_page(dn); 526e05df3b1SJaegeuk Kim } 52771e9fec5SJaegeuk Kim invalidate: 528e05df3b1SJaegeuk Kim clear_node_page_dirty(dn->node_page); 529e05df3b1SJaegeuk Kim F2FS_SET_SB_DIRT(sbi); 530e05df3b1SJaegeuk Kim 531e05df3b1SJaegeuk Kim f2fs_put_page(dn->node_page, 1); 532bf39c00aSJaegeuk Kim 533bf39c00aSJaegeuk Kim invalidate_mapping_pages(NODE_MAPPING(sbi), 534bf39c00aSJaegeuk Kim dn->node_page->index, dn->node_page->index); 535bf39c00aSJaegeuk Kim 536e05df3b1SJaegeuk Kim dn->node_page = NULL; 53751dd6249SNamjae Jeon trace_f2fs_truncate_node(dn->inode, dn->nid, ni.blk_addr); 538e05df3b1SJaegeuk Kim } 539e05df3b1SJaegeuk Kim 540e05df3b1SJaegeuk Kim static int truncate_dnode(struct dnode_of_data *dn) 541e05df3b1SJaegeuk Kim { 542e05df3b1SJaegeuk Kim struct page *page; 543e05df3b1SJaegeuk Kim 544e05df3b1SJaegeuk Kim if (dn->nid == 0) 545e05df3b1SJaegeuk Kim return 1; 546e05df3b1SJaegeuk Kim 547e05df3b1SJaegeuk Kim /* get direct node */ 5484081363fSJaegeuk Kim page = get_node_page(F2FS_I_SB(dn->inode), dn->nid); 549e05df3b1SJaegeuk Kim if (IS_ERR(page) && PTR_ERR(page) == -ENOENT) 550e05df3b1SJaegeuk Kim return 1; 551e05df3b1SJaegeuk Kim else if (IS_ERR(page)) 552e05df3b1SJaegeuk Kim return PTR_ERR(page); 553e05df3b1SJaegeuk Kim 554e05df3b1SJaegeuk Kim /* Make dnode_of_data for parameter */ 555e05df3b1SJaegeuk Kim dn->node_page = page; 556e05df3b1SJaegeuk Kim dn->ofs_in_node = 0; 557e05df3b1SJaegeuk Kim truncate_data_blocks(dn); 558e05df3b1SJaegeuk Kim truncate_node(dn); 559e05df3b1SJaegeuk Kim return 1; 560e05df3b1SJaegeuk Kim } 561e05df3b1SJaegeuk Kim 562e05df3b1SJaegeuk Kim static int truncate_nodes(struct dnode_of_data *dn, unsigned int nofs, 563e05df3b1SJaegeuk Kim int ofs, int depth) 564e05df3b1SJaegeuk Kim { 565e05df3b1SJaegeuk Kim struct dnode_of_data rdn = *dn; 566e05df3b1SJaegeuk Kim struct page *page; 567e05df3b1SJaegeuk Kim struct f2fs_node *rn; 568e05df3b1SJaegeuk Kim nid_t child_nid; 569e05df3b1SJaegeuk Kim unsigned int child_nofs; 570e05df3b1SJaegeuk Kim int freed = 0; 571e05df3b1SJaegeuk Kim int i, ret; 572e05df3b1SJaegeuk Kim 573e05df3b1SJaegeuk Kim if (dn->nid == 0) 574e05df3b1SJaegeuk Kim return NIDS_PER_BLOCK + 1; 575e05df3b1SJaegeuk Kim 57651dd6249SNamjae Jeon trace_f2fs_truncate_nodes_enter(dn->inode, dn->nid, dn->data_blkaddr); 57751dd6249SNamjae Jeon 5784081363fSJaegeuk Kim page = get_node_page(F2FS_I_SB(dn->inode), dn->nid); 57951dd6249SNamjae Jeon if (IS_ERR(page)) { 58051dd6249SNamjae Jeon trace_f2fs_truncate_nodes_exit(dn->inode, PTR_ERR(page)); 581e05df3b1SJaegeuk Kim return PTR_ERR(page); 58251dd6249SNamjae Jeon } 583e05df3b1SJaegeuk Kim 58445590710SGu Zheng rn = F2FS_NODE(page); 585e05df3b1SJaegeuk Kim if (depth < 3) { 586e05df3b1SJaegeuk Kim for (i = ofs; i < NIDS_PER_BLOCK; i++, freed++) { 587e05df3b1SJaegeuk Kim child_nid = le32_to_cpu(rn->in.nid[i]); 588e05df3b1SJaegeuk Kim if (child_nid == 0) 589e05df3b1SJaegeuk Kim continue; 590e05df3b1SJaegeuk Kim rdn.nid = child_nid; 591e05df3b1SJaegeuk Kim ret = truncate_dnode(&rdn); 592e05df3b1SJaegeuk Kim if (ret < 0) 593e05df3b1SJaegeuk Kim goto out_err; 594e05df3b1SJaegeuk Kim set_nid(page, i, 0, false); 595e05df3b1SJaegeuk Kim } 596e05df3b1SJaegeuk Kim } else { 597e05df3b1SJaegeuk Kim child_nofs = nofs + ofs * (NIDS_PER_BLOCK + 1) + 1; 598e05df3b1SJaegeuk Kim for (i = ofs; i < NIDS_PER_BLOCK; i++) { 599e05df3b1SJaegeuk Kim child_nid = le32_to_cpu(rn->in.nid[i]); 600e05df3b1SJaegeuk Kim if (child_nid == 0) { 601e05df3b1SJaegeuk Kim child_nofs += NIDS_PER_BLOCK + 1; 602e05df3b1SJaegeuk Kim continue; 603e05df3b1SJaegeuk Kim } 604e05df3b1SJaegeuk Kim rdn.nid = child_nid; 605e05df3b1SJaegeuk Kim ret = truncate_nodes(&rdn, child_nofs, 0, depth - 1); 606e05df3b1SJaegeuk Kim if (ret == (NIDS_PER_BLOCK + 1)) { 607e05df3b1SJaegeuk Kim set_nid(page, i, 0, false); 608e05df3b1SJaegeuk Kim child_nofs += ret; 609e05df3b1SJaegeuk Kim } else if (ret < 0 && ret != -ENOENT) { 610e05df3b1SJaegeuk Kim goto out_err; 611e05df3b1SJaegeuk Kim } 612e05df3b1SJaegeuk Kim } 613e05df3b1SJaegeuk Kim freed = child_nofs; 614e05df3b1SJaegeuk Kim } 615e05df3b1SJaegeuk Kim 616e05df3b1SJaegeuk Kim if (!ofs) { 617e05df3b1SJaegeuk Kim /* remove current indirect node */ 618e05df3b1SJaegeuk Kim dn->node_page = page; 619e05df3b1SJaegeuk Kim truncate_node(dn); 620e05df3b1SJaegeuk Kim freed++; 621e05df3b1SJaegeuk Kim } else { 622e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 623e05df3b1SJaegeuk Kim } 62451dd6249SNamjae Jeon trace_f2fs_truncate_nodes_exit(dn->inode, freed); 625e05df3b1SJaegeuk Kim return freed; 626e05df3b1SJaegeuk Kim 627e05df3b1SJaegeuk Kim out_err: 628e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 62951dd6249SNamjae Jeon trace_f2fs_truncate_nodes_exit(dn->inode, ret); 630e05df3b1SJaegeuk Kim return ret; 631e05df3b1SJaegeuk Kim } 632e05df3b1SJaegeuk Kim 633e05df3b1SJaegeuk Kim static int truncate_partial_nodes(struct dnode_of_data *dn, 634e05df3b1SJaegeuk Kim struct f2fs_inode *ri, int *offset, int depth) 635e05df3b1SJaegeuk Kim { 636e05df3b1SJaegeuk Kim struct page *pages[2]; 637e05df3b1SJaegeuk Kim nid_t nid[3]; 638e05df3b1SJaegeuk Kim nid_t child_nid; 639e05df3b1SJaegeuk Kim int err = 0; 640e05df3b1SJaegeuk Kim int i; 641e05df3b1SJaegeuk Kim int idx = depth - 2; 642e05df3b1SJaegeuk Kim 643e05df3b1SJaegeuk Kim nid[0] = le32_to_cpu(ri->i_nid[offset[0] - NODE_DIR1_BLOCK]); 644e05df3b1SJaegeuk Kim if (!nid[0]) 645e05df3b1SJaegeuk Kim return 0; 646e05df3b1SJaegeuk Kim 647e05df3b1SJaegeuk Kim /* get indirect nodes in the path */ 648a225dca3Sshifei10.ge for (i = 0; i < idx + 1; i++) { 649e1c42045Sarter97 /* reference count'll be increased */ 6504081363fSJaegeuk Kim pages[i] = get_node_page(F2FS_I_SB(dn->inode), nid[i]); 651e05df3b1SJaegeuk Kim if (IS_ERR(pages[i])) { 652e05df3b1SJaegeuk Kim err = PTR_ERR(pages[i]); 653a225dca3Sshifei10.ge idx = i - 1; 654e05df3b1SJaegeuk Kim goto fail; 655e05df3b1SJaegeuk Kim } 656e05df3b1SJaegeuk Kim nid[i + 1] = get_nid(pages[i], offset[i + 1], false); 657e05df3b1SJaegeuk Kim } 658e05df3b1SJaegeuk Kim 659e05df3b1SJaegeuk Kim /* free direct nodes linked to a partial indirect node */ 660a225dca3Sshifei10.ge for (i = offset[idx + 1]; i < NIDS_PER_BLOCK; i++) { 661e05df3b1SJaegeuk Kim child_nid = get_nid(pages[idx], i, false); 662e05df3b1SJaegeuk Kim if (!child_nid) 663e05df3b1SJaegeuk Kim continue; 664e05df3b1SJaegeuk Kim dn->nid = child_nid; 665e05df3b1SJaegeuk Kim err = truncate_dnode(dn); 666e05df3b1SJaegeuk Kim if (err < 0) 667e05df3b1SJaegeuk Kim goto fail; 668e05df3b1SJaegeuk Kim set_nid(pages[idx], i, 0, false); 669e05df3b1SJaegeuk Kim } 670e05df3b1SJaegeuk Kim 671a225dca3Sshifei10.ge if (offset[idx + 1] == 0) { 672e05df3b1SJaegeuk Kim dn->node_page = pages[idx]; 673e05df3b1SJaegeuk Kim dn->nid = nid[idx]; 674e05df3b1SJaegeuk Kim truncate_node(dn); 675e05df3b1SJaegeuk Kim } else { 676e05df3b1SJaegeuk Kim f2fs_put_page(pages[idx], 1); 677e05df3b1SJaegeuk Kim } 678e05df3b1SJaegeuk Kim offset[idx]++; 679a225dca3Sshifei10.ge offset[idx + 1] = 0; 680a225dca3Sshifei10.ge idx--; 681e05df3b1SJaegeuk Kim fail: 682a225dca3Sshifei10.ge for (i = idx; i >= 0; i--) 683e05df3b1SJaegeuk Kim f2fs_put_page(pages[i], 1); 68451dd6249SNamjae Jeon 68551dd6249SNamjae Jeon trace_f2fs_truncate_partial_nodes(dn->inode, nid, depth, err); 68651dd6249SNamjae Jeon 687e05df3b1SJaegeuk Kim return err; 688e05df3b1SJaegeuk Kim } 689e05df3b1SJaegeuk Kim 6900a8165d7SJaegeuk Kim /* 691e05df3b1SJaegeuk Kim * All the block addresses of data and nodes should be nullified. 692e05df3b1SJaegeuk Kim */ 693e05df3b1SJaegeuk Kim int truncate_inode_blocks(struct inode *inode, pgoff_t from) 694e05df3b1SJaegeuk Kim { 6954081363fSJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 696e05df3b1SJaegeuk Kim int err = 0, cont = 1; 697e05df3b1SJaegeuk Kim int level, offset[4], noffset[4]; 6987dd690c8SJaegeuk Kim unsigned int nofs = 0; 69958bfaf44SJaegeuk Kim struct f2fs_inode *ri; 700e05df3b1SJaegeuk Kim struct dnode_of_data dn; 701e05df3b1SJaegeuk Kim struct page *page; 702e05df3b1SJaegeuk Kim 70351dd6249SNamjae Jeon trace_f2fs_truncate_inode_blocks_enter(inode, from); 70451dd6249SNamjae Jeon 705de93653fSJaegeuk Kim level = get_node_path(F2FS_I(inode), from, offset, noffset); 706afcb7ca0SJaegeuk Kim restart: 707e05df3b1SJaegeuk Kim page = get_node_page(sbi, inode->i_ino); 70851dd6249SNamjae Jeon if (IS_ERR(page)) { 70951dd6249SNamjae Jeon trace_f2fs_truncate_inode_blocks_exit(inode, PTR_ERR(page)); 710e05df3b1SJaegeuk Kim return PTR_ERR(page); 71151dd6249SNamjae Jeon } 712e05df3b1SJaegeuk Kim 713e05df3b1SJaegeuk Kim set_new_dnode(&dn, inode, page, NULL, 0); 714e05df3b1SJaegeuk Kim unlock_page(page); 715e05df3b1SJaegeuk Kim 71658bfaf44SJaegeuk Kim ri = F2FS_INODE(page); 717e05df3b1SJaegeuk Kim switch (level) { 718e05df3b1SJaegeuk Kim case 0: 719e05df3b1SJaegeuk Kim case 1: 720e05df3b1SJaegeuk Kim nofs = noffset[1]; 721e05df3b1SJaegeuk Kim break; 722e05df3b1SJaegeuk Kim case 2: 723e05df3b1SJaegeuk Kim nofs = noffset[1]; 724e05df3b1SJaegeuk Kim if (!offset[level - 1]) 725e05df3b1SJaegeuk Kim goto skip_partial; 72658bfaf44SJaegeuk Kim err = truncate_partial_nodes(&dn, ri, offset, level); 727e05df3b1SJaegeuk Kim if (err < 0 && err != -ENOENT) 728e05df3b1SJaegeuk Kim goto fail; 729e05df3b1SJaegeuk Kim nofs += 1 + NIDS_PER_BLOCK; 730e05df3b1SJaegeuk Kim break; 731e05df3b1SJaegeuk Kim case 3: 732e05df3b1SJaegeuk Kim nofs = 5 + 2 * NIDS_PER_BLOCK; 733e05df3b1SJaegeuk Kim if (!offset[level - 1]) 734e05df3b1SJaegeuk Kim goto skip_partial; 73558bfaf44SJaegeuk Kim err = truncate_partial_nodes(&dn, ri, offset, level); 736e05df3b1SJaegeuk Kim if (err < 0 && err != -ENOENT) 737e05df3b1SJaegeuk Kim goto fail; 738e05df3b1SJaegeuk Kim break; 739e05df3b1SJaegeuk Kim default: 740e05df3b1SJaegeuk Kim BUG(); 741e05df3b1SJaegeuk Kim } 742e05df3b1SJaegeuk Kim 743e05df3b1SJaegeuk Kim skip_partial: 744e05df3b1SJaegeuk Kim while (cont) { 74558bfaf44SJaegeuk Kim dn.nid = le32_to_cpu(ri->i_nid[offset[0] - NODE_DIR1_BLOCK]); 746e05df3b1SJaegeuk Kim switch (offset[0]) { 747e05df3b1SJaegeuk Kim case NODE_DIR1_BLOCK: 748e05df3b1SJaegeuk Kim case NODE_DIR2_BLOCK: 749e05df3b1SJaegeuk Kim err = truncate_dnode(&dn); 750e05df3b1SJaegeuk Kim break; 751e05df3b1SJaegeuk Kim 752e05df3b1SJaegeuk Kim case NODE_IND1_BLOCK: 753e05df3b1SJaegeuk Kim case NODE_IND2_BLOCK: 754e05df3b1SJaegeuk Kim err = truncate_nodes(&dn, nofs, offset[1], 2); 755e05df3b1SJaegeuk Kim break; 756e05df3b1SJaegeuk Kim 757e05df3b1SJaegeuk Kim case NODE_DIND_BLOCK: 758e05df3b1SJaegeuk Kim err = truncate_nodes(&dn, nofs, offset[1], 3); 759e05df3b1SJaegeuk Kim cont = 0; 760e05df3b1SJaegeuk Kim break; 761e05df3b1SJaegeuk Kim 762e05df3b1SJaegeuk Kim default: 763e05df3b1SJaegeuk Kim BUG(); 764e05df3b1SJaegeuk Kim } 765e05df3b1SJaegeuk Kim if (err < 0 && err != -ENOENT) 766e05df3b1SJaegeuk Kim goto fail; 767e05df3b1SJaegeuk Kim if (offset[1] == 0 && 76858bfaf44SJaegeuk Kim ri->i_nid[offset[0] - NODE_DIR1_BLOCK]) { 769e05df3b1SJaegeuk Kim lock_page(page); 7704ef51a8fSJaegeuk Kim if (unlikely(page->mapping != NODE_MAPPING(sbi))) { 771afcb7ca0SJaegeuk Kim f2fs_put_page(page, 1); 772afcb7ca0SJaegeuk Kim goto restart; 773afcb7ca0SJaegeuk Kim } 7743cb5ad15SJaegeuk Kim f2fs_wait_on_page_writeback(page, NODE); 77558bfaf44SJaegeuk Kim ri->i_nid[offset[0] - NODE_DIR1_BLOCK] = 0; 776e05df3b1SJaegeuk Kim set_page_dirty(page); 777e05df3b1SJaegeuk Kim unlock_page(page); 778e05df3b1SJaegeuk Kim } 779e05df3b1SJaegeuk Kim offset[1] = 0; 780e05df3b1SJaegeuk Kim offset[0]++; 781e05df3b1SJaegeuk Kim nofs += err; 782e05df3b1SJaegeuk Kim } 783e05df3b1SJaegeuk Kim fail: 784e05df3b1SJaegeuk Kim f2fs_put_page(page, 0); 78551dd6249SNamjae Jeon trace_f2fs_truncate_inode_blocks_exit(inode, err); 786e05df3b1SJaegeuk Kim return err > 0 ? 0 : err; 787e05df3b1SJaegeuk Kim } 788e05df3b1SJaegeuk Kim 7894f16fb0fSJaegeuk Kim int truncate_xattr_node(struct inode *inode, struct page *page) 7904f16fb0fSJaegeuk Kim { 7914081363fSJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 7924f16fb0fSJaegeuk Kim nid_t nid = F2FS_I(inode)->i_xattr_nid; 7934f16fb0fSJaegeuk Kim struct dnode_of_data dn; 7944f16fb0fSJaegeuk Kim struct page *npage; 7954f16fb0fSJaegeuk Kim 7964f16fb0fSJaegeuk Kim if (!nid) 7974f16fb0fSJaegeuk Kim return 0; 7984f16fb0fSJaegeuk Kim 7994f16fb0fSJaegeuk Kim npage = get_node_page(sbi, nid); 8004f16fb0fSJaegeuk Kim if (IS_ERR(npage)) 8014f16fb0fSJaegeuk Kim return PTR_ERR(npage); 8024f16fb0fSJaegeuk Kim 8034f16fb0fSJaegeuk Kim F2FS_I(inode)->i_xattr_nid = 0; 80465985d93SJaegeuk Kim 80565985d93SJaegeuk Kim /* need to do checkpoint during fsync */ 80665985d93SJaegeuk Kim F2FS_I(inode)->xattr_ver = cur_cp_version(F2FS_CKPT(sbi)); 80765985d93SJaegeuk Kim 8084f16fb0fSJaegeuk Kim set_new_dnode(&dn, inode, page, npage, nid); 8094f16fb0fSJaegeuk Kim 8104f16fb0fSJaegeuk Kim if (page) 81101d2d1aaSChao Yu dn.inode_page_locked = true; 8124f16fb0fSJaegeuk Kim truncate_node(&dn); 8134f16fb0fSJaegeuk Kim return 0; 8144f16fb0fSJaegeuk Kim } 8154f16fb0fSJaegeuk Kim 81639936837SJaegeuk Kim /* 8174f4124d0SChao Yu * Caller should grab and release a rwsem by calling f2fs_lock_op() and 8184f4124d0SChao Yu * f2fs_unlock_op(). 81939936837SJaegeuk Kim */ 82058e674d6SGu Zheng void remove_inode_page(struct inode *inode) 821e05df3b1SJaegeuk Kim { 822e05df3b1SJaegeuk Kim struct dnode_of_data dn; 823e05df3b1SJaegeuk Kim 824c2e69583SJaegeuk Kim set_new_dnode(&dn, inode, NULL, NULL, inode->i_ino); 825c2e69583SJaegeuk Kim if (get_dnode_of_data(&dn, 0, LOOKUP_NODE)) 82658e674d6SGu Zheng return; 827e05df3b1SJaegeuk Kim 828c2e69583SJaegeuk Kim if (truncate_xattr_node(inode, dn.inode_page)) { 829c2e69583SJaegeuk Kim f2fs_put_dnode(&dn); 83058e674d6SGu Zheng return; 831e05df3b1SJaegeuk Kim } 832c2e69583SJaegeuk Kim 833c2e69583SJaegeuk Kim /* remove potential inline_data blocks */ 834c2e69583SJaegeuk Kim if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || 835c2e69583SJaegeuk Kim S_ISLNK(inode->i_mode)) 836c2e69583SJaegeuk Kim truncate_data_blocks_range(&dn, 1); 837c2e69583SJaegeuk Kim 838e1c42045Sarter97 /* 0 is possible, after f2fs_new_inode() has failed */ 8399850cf4aSJaegeuk Kim f2fs_bug_on(F2FS_I_SB(inode), 8409850cf4aSJaegeuk Kim inode->i_blocks != 0 && inode->i_blocks != 1); 841c2e69583SJaegeuk Kim 842c2e69583SJaegeuk Kim /* will put inode & node pages */ 843e05df3b1SJaegeuk Kim truncate_node(&dn); 844e05df3b1SJaegeuk Kim } 845e05df3b1SJaegeuk Kim 846a014e037SJaegeuk Kim struct page *new_inode_page(struct inode *inode) 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 { 8604081363fSJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); 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 */ 8809850cf4aSJaegeuk Kim f2fs_bug_on(sbi, 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 { 9184081363fSJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_P_SB(page); 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 return page; 986e05df3b1SJaegeuk Kim } 987e05df3b1SJaegeuk Kim 9880a8165d7SJaegeuk Kim /* 989e05df3b1SJaegeuk Kim * Return a locked page for the desired node page. 990e05df3b1SJaegeuk Kim * And, readahead MAX_RA_NODE number of node pages. 991e05df3b1SJaegeuk Kim */ 992e05df3b1SJaegeuk Kim struct page *get_node_page_ra(struct page *parent, int start) 993e05df3b1SJaegeuk Kim { 9944081363fSJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_P_SB(parent); 995c718379bSJaegeuk Kim struct blk_plug plug; 996e05df3b1SJaegeuk Kim struct page *page; 99756ae674cSJaegeuk Kim int err, i, end; 99856ae674cSJaegeuk Kim nid_t nid; 999e05df3b1SJaegeuk Kim 1000e05df3b1SJaegeuk Kim /* First, try getting the desired direct node. */ 1001e05df3b1SJaegeuk Kim nid = get_nid(parent, start, false); 1002e05df3b1SJaegeuk Kim if (!nid) 1003e05df3b1SJaegeuk Kim return ERR_PTR(-ENOENT); 1004afcb7ca0SJaegeuk Kim repeat: 10054ef51a8fSJaegeuk Kim page = grab_cache_page(NODE_MAPPING(sbi), nid); 1006e05df3b1SJaegeuk Kim if (!page) 1007e05df3b1SJaegeuk Kim return ERR_PTR(-ENOMEM); 1008e05df3b1SJaegeuk Kim 100966d36a29SJaegeuk Kim err = read_node_page(page, READ_SYNC); 101056ae674cSJaegeuk Kim if (err < 0) 1011e05df3b1SJaegeuk Kim return ERR_PTR(err); 101256ae674cSJaegeuk Kim else if (err == LOCKED_PAGE) 101356ae674cSJaegeuk Kim goto page_hit; 1014e05df3b1SJaegeuk Kim 1015c718379bSJaegeuk Kim blk_start_plug(&plug); 1016c718379bSJaegeuk Kim 1017e05df3b1SJaegeuk Kim /* Then, try readahead for siblings of the desired node */ 1018e05df3b1SJaegeuk Kim end = start + MAX_RA_NODE; 1019e05df3b1SJaegeuk Kim end = min(end, NIDS_PER_BLOCK); 1020e05df3b1SJaegeuk Kim for (i = start + 1; i < end; i++) { 1021e05df3b1SJaegeuk Kim nid = get_nid(parent, i, false); 1022e05df3b1SJaegeuk Kim if (!nid) 1023e05df3b1SJaegeuk Kim continue; 1024e05df3b1SJaegeuk Kim ra_node_page(sbi, nid); 1025e05df3b1SJaegeuk Kim } 1026e05df3b1SJaegeuk Kim 1027c718379bSJaegeuk Kim blk_finish_plug(&plug); 1028c718379bSJaegeuk Kim 1029e05df3b1SJaegeuk Kim lock_page(page); 10304ef51a8fSJaegeuk Kim if (unlikely(page->mapping != NODE_MAPPING(sbi))) { 1031afcb7ca0SJaegeuk Kim f2fs_put_page(page, 1); 1032afcb7ca0SJaegeuk Kim goto repeat; 1033afcb7ca0SJaegeuk Kim } 1034e0f56cb4SNamjae Jeon page_hit: 10356bacf52fSJaegeuk Kim if (unlikely(!PageUptodate(page))) { 1036e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 1037e05df3b1SJaegeuk Kim return ERR_PTR(-EIO); 1038e05df3b1SJaegeuk Kim } 1039e05df3b1SJaegeuk Kim return page; 1040e05df3b1SJaegeuk Kim } 1041e05df3b1SJaegeuk Kim 1042e05df3b1SJaegeuk Kim void sync_inode_page(struct dnode_of_data *dn) 1043e05df3b1SJaegeuk Kim { 1044e05df3b1SJaegeuk Kim if (IS_INODE(dn->node_page) || dn->inode_page == dn->node_page) { 1045e05df3b1SJaegeuk Kim update_inode(dn->inode, dn->node_page); 1046e05df3b1SJaegeuk Kim } else if (dn->inode_page) { 1047e05df3b1SJaegeuk Kim if (!dn->inode_page_locked) 1048e05df3b1SJaegeuk Kim lock_page(dn->inode_page); 1049e05df3b1SJaegeuk Kim update_inode(dn->inode, dn->inode_page); 1050e05df3b1SJaegeuk Kim if (!dn->inode_page_locked) 1051e05df3b1SJaegeuk Kim unlock_page(dn->inode_page); 1052e05df3b1SJaegeuk Kim } else { 105339936837SJaegeuk Kim update_inode_page(dn->inode); 1054e05df3b1SJaegeuk Kim } 1055e05df3b1SJaegeuk Kim } 1056e05df3b1SJaegeuk Kim 1057e05df3b1SJaegeuk Kim int sync_node_pages(struct f2fs_sb_info *sbi, nid_t ino, 1058e05df3b1SJaegeuk Kim struct writeback_control *wbc) 1059e05df3b1SJaegeuk Kim { 1060e05df3b1SJaegeuk Kim pgoff_t index, end; 1061e05df3b1SJaegeuk Kim struct pagevec pvec; 1062e05df3b1SJaegeuk Kim int step = ino ? 2 : 0; 1063e05df3b1SJaegeuk Kim int nwritten = 0, wrote = 0; 1064e05df3b1SJaegeuk Kim 1065e05df3b1SJaegeuk Kim pagevec_init(&pvec, 0); 1066e05df3b1SJaegeuk Kim 1067e05df3b1SJaegeuk Kim next_step: 1068e05df3b1SJaegeuk Kim index = 0; 1069e05df3b1SJaegeuk Kim end = LONG_MAX; 1070e05df3b1SJaegeuk Kim 1071e05df3b1SJaegeuk Kim while (index <= end) { 1072e05df3b1SJaegeuk Kim int i, nr_pages; 10734ef51a8fSJaegeuk Kim nr_pages = pagevec_lookup_tag(&pvec, NODE_MAPPING(sbi), &index, 1074e05df3b1SJaegeuk Kim PAGECACHE_TAG_DIRTY, 1075e05df3b1SJaegeuk Kim min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1); 1076e05df3b1SJaegeuk Kim if (nr_pages == 0) 1077e05df3b1SJaegeuk Kim break; 1078e05df3b1SJaegeuk Kim 1079e05df3b1SJaegeuk Kim for (i = 0; i < nr_pages; i++) { 1080e05df3b1SJaegeuk Kim struct page *page = pvec.pages[i]; 1081e05df3b1SJaegeuk Kim 1082e05df3b1SJaegeuk Kim /* 1083e05df3b1SJaegeuk Kim * flushing sequence with step: 1084e05df3b1SJaegeuk Kim * 0. indirect nodes 1085e05df3b1SJaegeuk Kim * 1. dentry dnodes 1086e05df3b1SJaegeuk Kim * 2. file dnodes 1087e05df3b1SJaegeuk Kim */ 1088e05df3b1SJaegeuk Kim if (step == 0 && IS_DNODE(page)) 1089e05df3b1SJaegeuk Kim continue; 1090e05df3b1SJaegeuk Kim if (step == 1 && (!IS_DNODE(page) || 1091e05df3b1SJaegeuk Kim is_cold_node(page))) 1092e05df3b1SJaegeuk Kim continue; 1093e05df3b1SJaegeuk Kim if (step == 2 && (!IS_DNODE(page) || 1094e05df3b1SJaegeuk Kim !is_cold_node(page))) 1095e05df3b1SJaegeuk Kim continue; 1096e05df3b1SJaegeuk Kim 1097e05df3b1SJaegeuk Kim /* 1098e05df3b1SJaegeuk Kim * If an fsync mode, 1099e05df3b1SJaegeuk Kim * we should not skip writing node pages. 1100e05df3b1SJaegeuk Kim */ 1101e05df3b1SJaegeuk Kim if (ino && ino_of_node(page) == ino) 1102e05df3b1SJaegeuk Kim lock_page(page); 1103e05df3b1SJaegeuk Kim else if (!trylock_page(page)) 1104e05df3b1SJaegeuk Kim continue; 1105e05df3b1SJaegeuk Kim 11064ef51a8fSJaegeuk Kim if (unlikely(page->mapping != NODE_MAPPING(sbi))) { 1107e05df3b1SJaegeuk Kim continue_unlock: 1108e05df3b1SJaegeuk Kim unlock_page(page); 1109e05df3b1SJaegeuk Kim continue; 1110e05df3b1SJaegeuk Kim } 1111e05df3b1SJaegeuk Kim if (ino && ino_of_node(page) != ino) 1112e05df3b1SJaegeuk Kim goto continue_unlock; 1113e05df3b1SJaegeuk Kim 1114e05df3b1SJaegeuk Kim if (!PageDirty(page)) { 1115e05df3b1SJaegeuk Kim /* someone wrote it for us */ 1116e05df3b1SJaegeuk Kim goto continue_unlock; 1117e05df3b1SJaegeuk Kim } 1118e05df3b1SJaegeuk Kim 1119e05df3b1SJaegeuk Kim if (!clear_page_dirty_for_io(page)) 1120e05df3b1SJaegeuk Kim goto continue_unlock; 1121e05df3b1SJaegeuk Kim 1122e05df3b1SJaegeuk Kim /* called by fsync() */ 1123e05df3b1SJaegeuk Kim if (ino && IS_DNODE(page)) { 1124e05df3b1SJaegeuk Kim int mark = !is_checkpointed_node(sbi, ino); 1125e05df3b1SJaegeuk Kim set_fsync_mark(page, 1); 1126e05df3b1SJaegeuk Kim if (IS_INODE(page)) 1127e05df3b1SJaegeuk Kim set_dentry_mark(page, mark); 1128e05df3b1SJaegeuk Kim nwritten++; 1129e05df3b1SJaegeuk Kim } else { 1130e05df3b1SJaegeuk Kim set_fsync_mark(page, 0); 1131e05df3b1SJaegeuk Kim set_dentry_mark(page, 0); 1132e05df3b1SJaegeuk Kim } 113352746519SJaegeuk Kim 113452746519SJaegeuk Kim if (NODE_MAPPING(sbi)->a_ops->writepage(page, wbc)) 113552746519SJaegeuk Kim unlock_page(page); 113652746519SJaegeuk Kim else 1137e05df3b1SJaegeuk Kim wrote++; 1138e05df3b1SJaegeuk Kim 1139e05df3b1SJaegeuk Kim if (--wbc->nr_to_write == 0) 1140e05df3b1SJaegeuk Kim break; 1141e05df3b1SJaegeuk Kim } 1142e05df3b1SJaegeuk Kim pagevec_release(&pvec); 1143e05df3b1SJaegeuk Kim cond_resched(); 1144e05df3b1SJaegeuk Kim 1145e05df3b1SJaegeuk Kim if (wbc->nr_to_write == 0) { 1146e05df3b1SJaegeuk Kim step = 2; 1147e05df3b1SJaegeuk Kim break; 1148e05df3b1SJaegeuk Kim } 1149e05df3b1SJaegeuk Kim } 1150e05df3b1SJaegeuk Kim 1151e05df3b1SJaegeuk Kim if (step < 2) { 1152e05df3b1SJaegeuk Kim step++; 1153e05df3b1SJaegeuk Kim goto next_step; 1154e05df3b1SJaegeuk Kim } 1155e05df3b1SJaegeuk Kim 1156e05df3b1SJaegeuk Kim if (wrote) 1157458e6197SJaegeuk Kim f2fs_submit_merged_bio(sbi, NODE, WRITE); 1158e05df3b1SJaegeuk Kim return nwritten; 1159e05df3b1SJaegeuk Kim } 1160e05df3b1SJaegeuk Kim 1161cfe58f9dSJaegeuk Kim int wait_on_node_pages_writeback(struct f2fs_sb_info *sbi, nid_t ino) 1162cfe58f9dSJaegeuk Kim { 1163cfe58f9dSJaegeuk Kim pgoff_t index = 0, end = LONG_MAX; 1164cfe58f9dSJaegeuk Kim struct pagevec pvec; 1165cfe58f9dSJaegeuk Kim int ret2 = 0, ret = 0; 1166cfe58f9dSJaegeuk Kim 1167cfe58f9dSJaegeuk Kim pagevec_init(&pvec, 0); 11684ef51a8fSJaegeuk Kim 11694ef51a8fSJaegeuk Kim while (index <= end) { 11704ef51a8fSJaegeuk Kim int i, nr_pages; 11714ef51a8fSJaegeuk Kim nr_pages = pagevec_lookup_tag(&pvec, NODE_MAPPING(sbi), &index, 1172cfe58f9dSJaegeuk Kim PAGECACHE_TAG_WRITEBACK, 11734ef51a8fSJaegeuk Kim min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1); 11744ef51a8fSJaegeuk Kim if (nr_pages == 0) 11754ef51a8fSJaegeuk Kim break; 1176cfe58f9dSJaegeuk Kim 1177cfe58f9dSJaegeuk Kim for (i = 0; i < nr_pages; i++) { 1178cfe58f9dSJaegeuk Kim struct page *page = pvec.pages[i]; 1179cfe58f9dSJaegeuk Kim 1180cfe58f9dSJaegeuk Kim /* until radix tree lookup accepts end_index */ 1181cfb271d4SChao Yu if (unlikely(page->index > end)) 1182cfe58f9dSJaegeuk Kim continue; 1183cfe58f9dSJaegeuk Kim 11844bf08ff6SChao Yu if (ino && ino_of_node(page) == ino) { 11853cb5ad15SJaegeuk Kim f2fs_wait_on_page_writeback(page, NODE); 1186cfe58f9dSJaegeuk Kim if (TestClearPageError(page)) 1187cfe58f9dSJaegeuk Kim ret = -EIO; 1188cfe58f9dSJaegeuk Kim } 11894bf08ff6SChao Yu } 1190cfe58f9dSJaegeuk Kim pagevec_release(&pvec); 1191cfe58f9dSJaegeuk Kim cond_resched(); 1192cfe58f9dSJaegeuk Kim } 1193cfe58f9dSJaegeuk Kim 11944ef51a8fSJaegeuk Kim if (unlikely(test_and_clear_bit(AS_ENOSPC, &NODE_MAPPING(sbi)->flags))) 1195cfe58f9dSJaegeuk Kim ret2 = -ENOSPC; 11964ef51a8fSJaegeuk Kim if (unlikely(test_and_clear_bit(AS_EIO, &NODE_MAPPING(sbi)->flags))) 1197cfe58f9dSJaegeuk Kim ret2 = -EIO; 1198cfe58f9dSJaegeuk Kim if (!ret) 1199cfe58f9dSJaegeuk Kim ret = ret2; 1200cfe58f9dSJaegeuk Kim return ret; 1201cfe58f9dSJaegeuk Kim } 1202cfe58f9dSJaegeuk Kim 1203e05df3b1SJaegeuk Kim static int f2fs_write_node_page(struct page *page, 1204e05df3b1SJaegeuk Kim struct writeback_control *wbc) 1205e05df3b1SJaegeuk Kim { 12064081363fSJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_P_SB(page); 1207e05df3b1SJaegeuk Kim nid_t nid; 1208e05df3b1SJaegeuk Kim block_t new_addr; 1209e05df3b1SJaegeuk Kim struct node_info ni; 1210fb5566daSJaegeuk Kim struct f2fs_io_info fio = { 1211fb5566daSJaegeuk Kim .type = NODE, 1212fb5566daSJaegeuk Kim .rw = (wbc->sync_mode == WB_SYNC_ALL) ? WRITE_SYNC : WRITE, 1213fb5566daSJaegeuk Kim }; 1214e05df3b1SJaegeuk Kim 1215ecda0de3SChao Yu trace_f2fs_writepage(page, NODE); 1216ecda0de3SChao Yu 1217cfb271d4SChao Yu if (unlikely(sbi->por_doing)) 121887a9bd26SJaegeuk Kim goto redirty_out; 1219cf779cabSJaegeuk Kim if (unlikely(f2fs_cp_error(sbi))) 1220cf779cabSJaegeuk Kim goto redirty_out; 122187a9bd26SJaegeuk Kim 12223cb5ad15SJaegeuk Kim f2fs_wait_on_page_writeback(page, NODE); 1223e05df3b1SJaegeuk Kim 1224e05df3b1SJaegeuk Kim /* get old block addr of this node page */ 1225e05df3b1SJaegeuk Kim nid = nid_of_node(page); 12269850cf4aSJaegeuk Kim f2fs_bug_on(sbi, page->index != nid); 1227e05df3b1SJaegeuk Kim 1228e05df3b1SJaegeuk Kim get_node_info(sbi, nid, &ni); 1229e05df3b1SJaegeuk Kim 1230e05df3b1SJaegeuk Kim /* This page is already truncated */ 12316bacf52fSJaegeuk Kim if (unlikely(ni.blk_addr == NULL_ADDR)) { 123239936837SJaegeuk Kim dec_page_count(sbi, F2FS_DIRTY_NODES); 123339936837SJaegeuk Kim unlock_page(page); 123439936837SJaegeuk Kim return 0; 123539936837SJaegeuk Kim } 1236e05df3b1SJaegeuk Kim 123787a9bd26SJaegeuk Kim if (wbc->for_reclaim) 123887a9bd26SJaegeuk Kim goto redirty_out; 123908d8058bSJaegeuk Kim 1240b3582c68SChao Yu down_read(&sbi->node_write); 1241e05df3b1SJaegeuk Kim set_page_writeback(page); 1242fb5566daSJaegeuk Kim write_node_page(sbi, page, &fio, nid, ni.blk_addr, &new_addr); 1243479f40c4SJaegeuk Kim set_node_addr(sbi, &ni, new_addr, is_fsync_dnode(page)); 1244e05df3b1SJaegeuk Kim dec_page_count(sbi, F2FS_DIRTY_NODES); 1245b3582c68SChao Yu up_read(&sbi->node_write); 1246e05df3b1SJaegeuk Kim unlock_page(page); 1247e05df3b1SJaegeuk Kim return 0; 124887a9bd26SJaegeuk Kim 124987a9bd26SJaegeuk Kim redirty_out: 125076f60268SJaegeuk Kim redirty_page_for_writepage(wbc, page); 125187a9bd26SJaegeuk Kim return AOP_WRITEPAGE_ACTIVATE; 1252e05df3b1SJaegeuk Kim } 1253e05df3b1SJaegeuk Kim 1254e05df3b1SJaegeuk Kim static int f2fs_write_node_pages(struct address_space *mapping, 1255e05df3b1SJaegeuk Kim struct writeback_control *wbc) 1256e05df3b1SJaegeuk Kim { 12574081363fSJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_M_SB(mapping); 125850c8cdb3SJaegeuk Kim long diff; 1259e05df3b1SJaegeuk Kim 1260e5748434SChao Yu trace_f2fs_writepages(mapping->host, wbc, NODE); 1261e5748434SChao Yu 12624660f9c0SJaegeuk Kim /* balancing f2fs's metadata in background */ 12634660f9c0SJaegeuk Kim f2fs_balance_fs_bg(sbi); 1264e05df3b1SJaegeuk Kim 1265a7fdffbdSJaegeuk Kim /* collect a number of dirty node pages and write together */ 126687d6f890SJaegeuk Kim if (get_pages(sbi, F2FS_DIRTY_NODES) < nr_pages_to_skip(sbi, NODE)) 1267d3baf95dSJaegeuk Kim goto skip_write; 1268a7fdffbdSJaegeuk Kim 126950c8cdb3SJaegeuk Kim diff = nr_pages_to_write(sbi, NODE, wbc); 1270fb5566daSJaegeuk Kim wbc->sync_mode = WB_SYNC_NONE; 1271e05df3b1SJaegeuk Kim sync_node_pages(sbi, 0, wbc); 127250c8cdb3SJaegeuk Kim wbc->nr_to_write = max((long)0, wbc->nr_to_write - diff); 1273e05df3b1SJaegeuk Kim return 0; 1274d3baf95dSJaegeuk Kim 1275d3baf95dSJaegeuk Kim skip_write: 1276d3baf95dSJaegeuk Kim wbc->pages_skipped += get_pages(sbi, F2FS_DIRTY_NODES); 1277d3baf95dSJaegeuk Kim return 0; 1278e05df3b1SJaegeuk Kim } 1279e05df3b1SJaegeuk Kim 1280e05df3b1SJaegeuk Kim static int f2fs_set_node_page_dirty(struct page *page) 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); 12874081363fSJaegeuk Kim inc_page_count(F2FS_P_SB(page), 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 if (PageDirty(page)) 12994081363fSJaegeuk Kim dec_page_count(F2FS_I_SB(inode), F2FS_DIRTY_NODES); 1300e05df3b1SJaegeuk Kim ClearPagePrivate(page); 1301e05df3b1SJaegeuk Kim } 1302e05df3b1SJaegeuk Kim 1303e05df3b1SJaegeuk Kim static int f2fs_release_node_page(struct page *page, gfp_t wait) 1304e05df3b1SJaegeuk Kim { 1305e05df3b1SJaegeuk Kim ClearPagePrivate(page); 1306c3850aa1SJaegeuk Kim return 1; 1307e05df3b1SJaegeuk Kim } 1308e05df3b1SJaegeuk Kim 13090a8165d7SJaegeuk Kim /* 1310e05df3b1SJaegeuk Kim * Structure of the f2fs node operations 1311e05df3b1SJaegeuk Kim */ 1312e05df3b1SJaegeuk Kim const struct address_space_operations f2fs_node_aops = { 1313e05df3b1SJaegeuk Kim .writepage = f2fs_write_node_page, 1314e05df3b1SJaegeuk Kim .writepages = f2fs_write_node_pages, 1315e05df3b1SJaegeuk Kim .set_page_dirty = f2fs_set_node_page_dirty, 1316e05df3b1SJaegeuk Kim .invalidatepage = f2fs_invalidate_node_page, 1317e05df3b1SJaegeuk Kim .releasepage = f2fs_release_node_page, 1318e05df3b1SJaegeuk Kim }; 1319e05df3b1SJaegeuk Kim 13208a7ed66aSJaegeuk Kim static struct free_nid *__lookup_free_nid_list(struct f2fs_nm_info *nm_i, 13218a7ed66aSJaegeuk Kim nid_t n) 1322e05df3b1SJaegeuk Kim { 13238a7ed66aSJaegeuk Kim return radix_tree_lookup(&nm_i->free_nid_root, n); 13243aa770a9SNamjae Jeon } 1325e05df3b1SJaegeuk Kim 13268a7ed66aSJaegeuk Kim static void __del_from_free_nid_list(struct f2fs_nm_info *nm_i, 13278a7ed66aSJaegeuk Kim struct free_nid *i) 1328e05df3b1SJaegeuk Kim { 1329e05df3b1SJaegeuk Kim list_del(&i->list); 13308a7ed66aSJaegeuk Kim radix_tree_delete(&nm_i->free_nid_root, i->nid); 1331e05df3b1SJaegeuk Kim } 1332e05df3b1SJaegeuk Kim 13336fb03f3aSJaegeuk Kim static int add_free_nid(struct f2fs_sb_info *sbi, nid_t nid, bool build) 1334e05df3b1SJaegeuk Kim { 13356fb03f3aSJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1336e05df3b1SJaegeuk Kim struct free_nid *i; 133759bbd474SJaegeuk Kim struct nat_entry *ne; 133859bbd474SJaegeuk Kim bool allocated = false; 1339e05df3b1SJaegeuk Kim 13406fb03f3aSJaegeuk Kim if (!available_free_memory(sbi, FREE_NIDS)) 134123d38844SHaicheng Li return -1; 13429198acebSJaegeuk Kim 13439198acebSJaegeuk Kim /* 0 nid should not be used */ 1344cfb271d4SChao Yu if (unlikely(nid == 0)) 13459198acebSJaegeuk Kim return 0; 134659bbd474SJaegeuk Kim 13477bd59381SGu Zheng if (build) { 134859bbd474SJaegeuk Kim /* do not add allocated nids */ 134959bbd474SJaegeuk Kim read_lock(&nm_i->nat_tree_lock); 135059bbd474SJaegeuk Kim ne = __lookup_nat_cache(nm_i, nid); 13518a7ed66aSJaegeuk Kim if (ne && 13528a7ed66aSJaegeuk Kim (!ne->checkpointed || nat_get_blkaddr(ne) != NULL_ADDR)) 135359bbd474SJaegeuk Kim allocated = true; 135459bbd474SJaegeuk Kim read_unlock(&nm_i->nat_tree_lock); 135559bbd474SJaegeuk Kim if (allocated) 135659bbd474SJaegeuk Kim return 0; 1357e05df3b1SJaegeuk Kim } 13587bd59381SGu Zheng 13597bd59381SGu Zheng i = f2fs_kmem_cache_alloc(free_nid_slab, GFP_NOFS); 1360e05df3b1SJaegeuk Kim i->nid = nid; 1361e05df3b1SJaegeuk Kim i->state = NID_NEW; 1362e05df3b1SJaegeuk Kim 1363e05df3b1SJaegeuk Kim spin_lock(&nm_i->free_nid_list_lock); 13648a7ed66aSJaegeuk Kim if (radix_tree_insert(&nm_i->free_nid_root, i->nid, i)) { 1365e05df3b1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1366e05df3b1SJaegeuk Kim kmem_cache_free(free_nid_slab, i); 1367e05df3b1SJaegeuk Kim return 0; 1368e05df3b1SJaegeuk Kim } 1369e05df3b1SJaegeuk Kim list_add_tail(&i->list, &nm_i->free_nid_list); 1370e05df3b1SJaegeuk Kim nm_i->fcnt++; 1371e05df3b1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1372e05df3b1SJaegeuk Kim return 1; 1373e05df3b1SJaegeuk Kim } 1374e05df3b1SJaegeuk Kim 1375e05df3b1SJaegeuk Kim static void remove_free_nid(struct f2fs_nm_info *nm_i, nid_t nid) 1376e05df3b1SJaegeuk Kim { 1377e05df3b1SJaegeuk Kim struct free_nid *i; 1378cf0ee0f0SChao Yu bool need_free = false; 1379cf0ee0f0SChao Yu 1380e05df3b1SJaegeuk Kim spin_lock(&nm_i->free_nid_list_lock); 13818a7ed66aSJaegeuk Kim i = __lookup_free_nid_list(nm_i, nid); 1382e05df3b1SJaegeuk Kim if (i && i->state == NID_NEW) { 13838a7ed66aSJaegeuk Kim __del_from_free_nid_list(nm_i, i); 1384e05df3b1SJaegeuk Kim nm_i->fcnt--; 1385cf0ee0f0SChao Yu need_free = true; 1386e05df3b1SJaegeuk Kim } 1387e05df3b1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1388cf0ee0f0SChao Yu 1389cf0ee0f0SChao Yu if (need_free) 1390cf0ee0f0SChao Yu kmem_cache_free(free_nid_slab, i); 1391e05df3b1SJaegeuk Kim } 1392e05df3b1SJaegeuk Kim 13936fb03f3aSJaegeuk Kim static void scan_nat_page(struct f2fs_sb_info *sbi, 1394e05df3b1SJaegeuk Kim struct page *nat_page, nid_t start_nid) 1395e05df3b1SJaegeuk Kim { 13966fb03f3aSJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1397e05df3b1SJaegeuk Kim struct f2fs_nat_block *nat_blk = page_address(nat_page); 1398e05df3b1SJaegeuk Kim block_t blk_addr; 1399e05df3b1SJaegeuk Kim int i; 1400e05df3b1SJaegeuk Kim 1401e05df3b1SJaegeuk Kim i = start_nid % NAT_ENTRY_PER_BLOCK; 1402e05df3b1SJaegeuk Kim 1403e05df3b1SJaegeuk Kim for (; i < NAT_ENTRY_PER_BLOCK; i++, start_nid++) { 140423d38844SHaicheng Li 1405cfb271d4SChao Yu if (unlikely(start_nid >= nm_i->max_nid)) 140604431c44SJaegeuk Kim break; 140723d38844SHaicheng Li 1408e05df3b1SJaegeuk Kim blk_addr = le32_to_cpu(nat_blk->entries[i].block_addr); 14099850cf4aSJaegeuk Kim f2fs_bug_on(sbi, blk_addr == NEW_ADDR); 141023d38844SHaicheng Li if (blk_addr == NULL_ADDR) { 14116fb03f3aSJaegeuk Kim if (add_free_nid(sbi, start_nid, true) < 0) 141223d38844SHaicheng Li break; 141323d38844SHaicheng Li } 1414e05df3b1SJaegeuk Kim } 1415e05df3b1SJaegeuk Kim } 1416e05df3b1SJaegeuk Kim 1417e05df3b1SJaegeuk Kim static void build_free_nids(struct f2fs_sb_info *sbi) 1418e05df3b1SJaegeuk Kim { 1419e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1420e05df3b1SJaegeuk Kim struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); 1421e05df3b1SJaegeuk Kim struct f2fs_summary_block *sum = curseg->sum_blk; 14228760952dSHaicheng Li int i = 0; 142355008d84SJaegeuk Kim nid_t nid = nm_i->next_scan_nid; 1424e05df3b1SJaegeuk Kim 142555008d84SJaegeuk Kim /* Enough entries */ 142655008d84SJaegeuk Kim if (nm_i->fcnt > NAT_ENTRY_PER_BLOCK) 142755008d84SJaegeuk Kim return; 1428e05df3b1SJaegeuk Kim 142955008d84SJaegeuk Kim /* readahead nat pages to be scanned */ 1430662befdaSChao Yu ra_meta_pages(sbi, NAT_BLOCK_OFFSET(nid), FREE_NID_PAGES, META_NAT); 1431e05df3b1SJaegeuk Kim 1432e05df3b1SJaegeuk Kim while (1) { 1433e05df3b1SJaegeuk Kim struct page *page = get_current_nat_page(sbi, nid); 1434e05df3b1SJaegeuk Kim 14356fb03f3aSJaegeuk Kim scan_nat_page(sbi, page, nid); 1436e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 1437e05df3b1SJaegeuk Kim 1438e05df3b1SJaegeuk Kim nid += (NAT_ENTRY_PER_BLOCK - (nid % NAT_ENTRY_PER_BLOCK)); 1439cfb271d4SChao Yu if (unlikely(nid >= nm_i->max_nid)) 1440e05df3b1SJaegeuk Kim nid = 0; 144155008d84SJaegeuk Kim 144255008d84SJaegeuk Kim if (i++ == FREE_NID_PAGES) 1443e05df3b1SJaegeuk Kim break; 1444e05df3b1SJaegeuk Kim } 1445e05df3b1SJaegeuk Kim 144655008d84SJaegeuk Kim /* go to the next free nat pages to find free nids abundantly */ 144755008d84SJaegeuk Kim nm_i->next_scan_nid = nid; 1448e05df3b1SJaegeuk Kim 1449e05df3b1SJaegeuk Kim /* find free nids from current sum_pages */ 1450e05df3b1SJaegeuk Kim mutex_lock(&curseg->curseg_mutex); 1451e05df3b1SJaegeuk Kim for (i = 0; i < nats_in_cursum(sum); i++) { 1452e05df3b1SJaegeuk Kim block_t addr = le32_to_cpu(nat_in_journal(sum, i).block_addr); 1453e05df3b1SJaegeuk Kim nid = le32_to_cpu(nid_in_journal(sum, i)); 1454e05df3b1SJaegeuk Kim if (addr == NULL_ADDR) 14556fb03f3aSJaegeuk Kim add_free_nid(sbi, nid, true); 1456e05df3b1SJaegeuk Kim else 1457e05df3b1SJaegeuk Kim remove_free_nid(nm_i, nid); 1458e05df3b1SJaegeuk Kim } 1459e05df3b1SJaegeuk Kim mutex_unlock(&curseg->curseg_mutex); 1460e05df3b1SJaegeuk Kim } 1461e05df3b1SJaegeuk Kim 1462e05df3b1SJaegeuk Kim /* 1463e05df3b1SJaegeuk Kim * If this function returns success, caller can obtain a new nid 1464e05df3b1SJaegeuk Kim * from second parameter of this function. 1465e05df3b1SJaegeuk Kim * The returned nid could be used ino as well as nid when inode is created. 1466e05df3b1SJaegeuk Kim */ 1467e05df3b1SJaegeuk Kim bool alloc_nid(struct f2fs_sb_info *sbi, nid_t *nid) 1468e05df3b1SJaegeuk Kim { 1469e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1470e05df3b1SJaegeuk Kim struct free_nid *i = NULL; 1471e05df3b1SJaegeuk Kim retry: 14727ee0eeabSJaegeuk Kim if (unlikely(sbi->total_valid_node_count + 1 > nm_i->available_nids)) 1473e05df3b1SJaegeuk Kim return false; 1474e05df3b1SJaegeuk Kim 1475e05df3b1SJaegeuk Kim spin_lock(&nm_i->free_nid_list_lock); 1476e05df3b1SJaegeuk Kim 147755008d84SJaegeuk Kim /* We should not use stale free nids created by build_free_nids */ 1478f978f5a0SGu Zheng if (nm_i->fcnt && !on_build_free_nids(nm_i)) { 14799850cf4aSJaegeuk Kim f2fs_bug_on(sbi, list_empty(&nm_i->free_nid_list)); 14802d7b822aSChao Yu list_for_each_entry(i, &nm_i->free_nid_list, list) 1481e05df3b1SJaegeuk Kim if (i->state == NID_NEW) 1482e05df3b1SJaegeuk Kim break; 1483e05df3b1SJaegeuk Kim 14849850cf4aSJaegeuk Kim f2fs_bug_on(sbi, i->state != NID_NEW); 1485e05df3b1SJaegeuk Kim *nid = i->nid; 1486e05df3b1SJaegeuk Kim i->state = NID_ALLOC; 1487e05df3b1SJaegeuk Kim nm_i->fcnt--; 1488e05df3b1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1489e05df3b1SJaegeuk Kim return true; 1490e05df3b1SJaegeuk Kim } 149155008d84SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 149255008d84SJaegeuk Kim 149355008d84SJaegeuk Kim /* Let's scan nat pages and its caches to get free nids */ 149455008d84SJaegeuk Kim mutex_lock(&nm_i->build_lock); 149555008d84SJaegeuk Kim build_free_nids(sbi); 149655008d84SJaegeuk Kim mutex_unlock(&nm_i->build_lock); 149755008d84SJaegeuk Kim goto retry; 149855008d84SJaegeuk Kim } 1499e05df3b1SJaegeuk Kim 15000a8165d7SJaegeuk Kim /* 1501e05df3b1SJaegeuk Kim * alloc_nid() should be called prior to this function. 1502e05df3b1SJaegeuk Kim */ 1503e05df3b1SJaegeuk Kim void alloc_nid_done(struct f2fs_sb_info *sbi, nid_t nid) 1504e05df3b1SJaegeuk Kim { 1505e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1506e05df3b1SJaegeuk Kim struct free_nid *i; 1507e05df3b1SJaegeuk Kim 1508e05df3b1SJaegeuk Kim spin_lock(&nm_i->free_nid_list_lock); 15098a7ed66aSJaegeuk Kim i = __lookup_free_nid_list(nm_i, nid); 15109850cf4aSJaegeuk Kim f2fs_bug_on(sbi, !i || i->state != NID_ALLOC); 15118a7ed66aSJaegeuk Kim __del_from_free_nid_list(nm_i, i); 1512e05df3b1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1513cf0ee0f0SChao Yu 1514cf0ee0f0SChao Yu kmem_cache_free(free_nid_slab, i); 1515e05df3b1SJaegeuk Kim } 1516e05df3b1SJaegeuk Kim 15170a8165d7SJaegeuk Kim /* 1518e05df3b1SJaegeuk Kim * alloc_nid() should be called prior to this function. 1519e05df3b1SJaegeuk Kim */ 1520e05df3b1SJaegeuk Kim void alloc_nid_failed(struct f2fs_sb_info *sbi, nid_t nid) 1521e05df3b1SJaegeuk Kim { 152249952fa1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 152349952fa1SJaegeuk Kim struct free_nid *i; 1524cf0ee0f0SChao Yu bool need_free = false; 152549952fa1SJaegeuk Kim 152665985d93SJaegeuk Kim if (!nid) 152765985d93SJaegeuk Kim return; 152865985d93SJaegeuk Kim 152949952fa1SJaegeuk Kim spin_lock(&nm_i->free_nid_list_lock); 15308a7ed66aSJaegeuk Kim i = __lookup_free_nid_list(nm_i, nid); 15319850cf4aSJaegeuk Kim f2fs_bug_on(sbi, !i || i->state != NID_ALLOC); 15326fb03f3aSJaegeuk Kim if (!available_free_memory(sbi, FREE_NIDS)) { 15338a7ed66aSJaegeuk Kim __del_from_free_nid_list(nm_i, i); 1534cf0ee0f0SChao Yu need_free = true; 153595630cbaSHaicheng Li } else { 153649952fa1SJaegeuk Kim i->state = NID_NEW; 153749952fa1SJaegeuk Kim nm_i->fcnt++; 153895630cbaSHaicheng Li } 153949952fa1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1540cf0ee0f0SChao Yu 1541cf0ee0f0SChao Yu if (need_free) 1542cf0ee0f0SChao Yu kmem_cache_free(free_nid_slab, i); 1543e05df3b1SJaegeuk Kim } 1544e05df3b1SJaegeuk Kim 154570cfed88SChao Yu void recover_inline_xattr(struct inode *inode, struct page *page) 154628cdce04SChao Yu { 154728cdce04SChao Yu void *src_addr, *dst_addr; 154828cdce04SChao Yu size_t inline_size; 154928cdce04SChao Yu struct page *ipage; 155028cdce04SChao Yu struct f2fs_inode *ri; 155128cdce04SChao Yu 15524081363fSJaegeuk Kim ipage = get_node_page(F2FS_I_SB(inode), inode->i_ino); 15539850cf4aSJaegeuk Kim f2fs_bug_on(F2FS_I_SB(inode), IS_ERR(ipage)); 155428cdce04SChao Yu 1555e3b4d43fSJaegeuk Kim ri = F2FS_INODE(page); 1556e3b4d43fSJaegeuk Kim if (!(ri->i_inline & F2FS_INLINE_XATTR)) { 1557e3b4d43fSJaegeuk Kim clear_inode_flag(F2FS_I(inode), FI_INLINE_XATTR); 1558e3b4d43fSJaegeuk Kim goto update_inode; 1559e3b4d43fSJaegeuk Kim } 1560e3b4d43fSJaegeuk Kim 156128cdce04SChao Yu dst_addr = inline_xattr_addr(ipage); 156228cdce04SChao Yu src_addr = inline_xattr_addr(page); 156328cdce04SChao Yu inline_size = inline_xattr_size(inode); 156428cdce04SChao Yu 156554b591dfSJaegeuk Kim f2fs_wait_on_page_writeback(ipage, NODE); 156628cdce04SChao Yu memcpy(dst_addr, src_addr, inline_size); 1567e3b4d43fSJaegeuk Kim update_inode: 156828cdce04SChao Yu update_inode(inode, ipage); 156928cdce04SChao Yu f2fs_put_page(ipage, 1); 157028cdce04SChao Yu } 157128cdce04SChao Yu 15721c35a90eSJaegeuk Kim void recover_xattr_data(struct inode *inode, struct page *page, block_t blkaddr) 1573abb2366cSJaegeuk Kim { 15744081363fSJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 1575abb2366cSJaegeuk Kim nid_t prev_xnid = F2FS_I(inode)->i_xattr_nid; 1576abb2366cSJaegeuk Kim nid_t new_xnid = nid_of_node(page); 1577abb2366cSJaegeuk Kim struct node_info ni; 1578abb2366cSJaegeuk Kim 1579abb2366cSJaegeuk Kim /* 1: invalidate the previous xattr nid */ 1580abb2366cSJaegeuk Kim if (!prev_xnid) 1581abb2366cSJaegeuk Kim goto recover_xnid; 1582abb2366cSJaegeuk Kim 1583abb2366cSJaegeuk Kim /* Deallocate node address */ 1584abb2366cSJaegeuk Kim get_node_info(sbi, prev_xnid, &ni); 15859850cf4aSJaegeuk Kim f2fs_bug_on(sbi, ni.blk_addr == NULL_ADDR); 1586abb2366cSJaegeuk Kim invalidate_blocks(sbi, ni.blk_addr); 1587abb2366cSJaegeuk Kim dec_valid_node_count(sbi, inode); 1588479f40c4SJaegeuk Kim set_node_addr(sbi, &ni, NULL_ADDR, false); 1589abb2366cSJaegeuk Kim 1590abb2366cSJaegeuk Kim recover_xnid: 1591abb2366cSJaegeuk Kim /* 2: allocate new xattr nid */ 1592abb2366cSJaegeuk Kim if (unlikely(!inc_valid_node_count(sbi, inode))) 15939850cf4aSJaegeuk Kim f2fs_bug_on(sbi, 1); 1594abb2366cSJaegeuk Kim 1595abb2366cSJaegeuk Kim remove_free_nid(NM_I(sbi), new_xnid); 1596abb2366cSJaegeuk Kim get_node_info(sbi, new_xnid, &ni); 1597abb2366cSJaegeuk Kim ni.ino = inode->i_ino; 1598479f40c4SJaegeuk Kim set_node_addr(sbi, &ni, NEW_ADDR, false); 1599abb2366cSJaegeuk Kim F2FS_I(inode)->i_xattr_nid = new_xnid; 1600abb2366cSJaegeuk Kim 1601abb2366cSJaegeuk Kim /* 3: update xattr blkaddr */ 1602abb2366cSJaegeuk Kim refresh_sit_entry(sbi, NEW_ADDR, blkaddr); 1603479f40c4SJaegeuk Kim set_node_addr(sbi, &ni, blkaddr, false); 1604abb2366cSJaegeuk Kim 1605abb2366cSJaegeuk Kim update_inode_page(inode); 1606abb2366cSJaegeuk Kim } 1607abb2366cSJaegeuk Kim 1608e05df3b1SJaegeuk Kim int recover_inode_page(struct f2fs_sb_info *sbi, struct page *page) 1609e05df3b1SJaegeuk Kim { 161058bfaf44SJaegeuk Kim struct f2fs_inode *src, *dst; 1611e05df3b1SJaegeuk Kim nid_t ino = ino_of_node(page); 1612e05df3b1SJaegeuk Kim struct node_info old_ni, new_ni; 1613e05df3b1SJaegeuk Kim struct page *ipage; 1614e05df3b1SJaegeuk Kim 1615e8271fa3SJaegeuk Kim get_node_info(sbi, ino, &old_ni); 1616e8271fa3SJaegeuk Kim 1617e8271fa3SJaegeuk Kim if (unlikely(old_ni.blk_addr != NULL_ADDR)) 1618e8271fa3SJaegeuk Kim return -EINVAL; 1619e8271fa3SJaegeuk Kim 16204ef51a8fSJaegeuk Kim ipage = grab_cache_page(NODE_MAPPING(sbi), ino); 1621e05df3b1SJaegeuk Kim if (!ipage) 1622e05df3b1SJaegeuk Kim return -ENOMEM; 1623e05df3b1SJaegeuk Kim 1624e05df3b1SJaegeuk Kim /* Should not use this inode from free nid list */ 1625e05df3b1SJaegeuk Kim remove_free_nid(NM_I(sbi), ino); 1626e05df3b1SJaegeuk Kim 1627e05df3b1SJaegeuk Kim SetPageUptodate(ipage); 1628e05df3b1SJaegeuk Kim fill_node_footer(ipage, ino, ino, 0, true); 1629e05df3b1SJaegeuk Kim 163058bfaf44SJaegeuk Kim src = F2FS_INODE(page); 163158bfaf44SJaegeuk Kim dst = F2FS_INODE(ipage); 1632e05df3b1SJaegeuk Kim 163358bfaf44SJaegeuk Kim memcpy(dst, src, (unsigned long)&src->i_ext - (unsigned long)src); 163458bfaf44SJaegeuk Kim dst->i_size = 0; 163558bfaf44SJaegeuk Kim dst->i_blocks = cpu_to_le64(1); 163658bfaf44SJaegeuk Kim dst->i_links = cpu_to_le32(1); 163758bfaf44SJaegeuk Kim dst->i_xattr_nid = 0; 1638617deb8cSJaegeuk Kim dst->i_inline = src->i_inline & F2FS_INLINE_XATTR; 1639e05df3b1SJaegeuk Kim 1640e05df3b1SJaegeuk Kim new_ni = old_ni; 1641e05df3b1SJaegeuk Kim new_ni.ino = ino; 1642e05df3b1SJaegeuk Kim 1643cfb271d4SChao Yu if (unlikely(!inc_valid_node_count(sbi, NULL))) 164465e5cd0aSJaegeuk Kim WARN_ON(1); 1645479f40c4SJaegeuk Kim set_node_addr(sbi, &new_ni, NEW_ADDR, false); 1646e05df3b1SJaegeuk Kim inc_valid_inode_count(sbi); 1647617deb8cSJaegeuk Kim set_page_dirty(ipage); 1648e05df3b1SJaegeuk Kim f2fs_put_page(ipage, 1); 1649e05df3b1SJaegeuk Kim return 0; 1650e05df3b1SJaegeuk Kim } 1651e05df3b1SJaegeuk Kim 16529af0ff1cSChao Yu /* 16539af0ff1cSChao Yu * ra_sum_pages() merge contiguous pages into one bio and submit. 1654e1c42045Sarter97 * these pre-read pages are allocated in bd_inode's mapping tree. 16559af0ff1cSChao Yu */ 1656bac4eef6SChao Yu static int ra_sum_pages(struct f2fs_sb_info *sbi, struct page **pages, 16579af0ff1cSChao Yu int start, int nrpages) 16589af0ff1cSChao Yu { 1659bac4eef6SChao Yu struct inode *inode = sbi->sb->s_bdev->bd_inode; 1660bac4eef6SChao Yu struct address_space *mapping = inode->i_mapping; 1661bac4eef6SChao Yu int i, page_idx = start; 1662458e6197SJaegeuk Kim struct f2fs_io_info fio = { 1663458e6197SJaegeuk Kim .type = META, 16647e8f2308SGu Zheng .rw = READ_SYNC | REQ_META | REQ_PRIO 1665458e6197SJaegeuk Kim }; 16669af0ff1cSChao Yu 1667bac4eef6SChao Yu for (i = 0; page_idx < start + nrpages; page_idx++, i++) { 1668bac4eef6SChao Yu /* alloc page in bd_inode for reading node summary info */ 1669bac4eef6SChao Yu pages[i] = grab_cache_page(mapping, page_idx); 1670bac4eef6SChao Yu if (!pages[i]) 1671d653788aSGu Zheng break; 1672bac4eef6SChao Yu f2fs_submit_page_mbio(sbi, pages[i], page_idx, &fio); 16739af0ff1cSChao Yu } 16749af0ff1cSChao Yu 1675458e6197SJaegeuk Kim f2fs_submit_merged_bio(sbi, META, READ); 1676bac4eef6SChao Yu return i; 16779af0ff1cSChao Yu } 16789af0ff1cSChao Yu 1679e05df3b1SJaegeuk Kim int restore_node_summary(struct f2fs_sb_info *sbi, 1680e05df3b1SJaegeuk Kim unsigned int segno, struct f2fs_summary_block *sum) 1681e05df3b1SJaegeuk Kim { 1682e05df3b1SJaegeuk Kim struct f2fs_node *rn; 1683e05df3b1SJaegeuk Kim struct f2fs_summary *sum_entry; 1684bac4eef6SChao Yu struct inode *inode = sbi->sb->s_bdev->bd_inode; 1685e05df3b1SJaegeuk Kim block_t addr; 16869af0ff1cSChao Yu int bio_blocks = MAX_BIO_BLOCKS(max_hw_blocks(sbi)); 1687bac4eef6SChao Yu struct page *pages[bio_blocks]; 1688bac4eef6SChao Yu int i, idx, last_offset, nrpages, err = 0; 1689e05df3b1SJaegeuk Kim 1690e05df3b1SJaegeuk Kim /* scan the node segment */ 1691e05df3b1SJaegeuk Kim last_offset = sbi->blocks_per_seg; 1692e05df3b1SJaegeuk Kim addr = START_BLOCK(sbi, segno); 1693e05df3b1SJaegeuk Kim sum_entry = &sum->entries[0]; 1694e05df3b1SJaegeuk Kim 1695d653788aSGu Zheng for (i = 0; !err && i < last_offset; i += nrpages, addr += nrpages) { 16969af0ff1cSChao Yu nrpages = min(last_offset - i, bio_blocks); 1697393ff91fSJaegeuk Kim 16989af0ff1cSChao Yu /* readahead node pages */ 1699bac4eef6SChao Yu nrpages = ra_sum_pages(sbi, pages, addr, nrpages); 1700d653788aSGu Zheng if (!nrpages) 1701d653788aSGu Zheng return -ENOMEM; 17029af0ff1cSChao Yu 1703bac4eef6SChao Yu for (idx = 0; idx < nrpages; idx++) { 1704d653788aSGu Zheng if (err) 1705d653788aSGu Zheng goto skip; 1706393ff91fSJaegeuk Kim 1707bac4eef6SChao Yu lock_page(pages[idx]); 1708bac4eef6SChao Yu if (unlikely(!PageUptodate(pages[idx]))) { 17096bacf52fSJaegeuk Kim err = -EIO; 17106bacf52fSJaegeuk Kim } else { 1711bac4eef6SChao Yu rn = F2FS_NODE(pages[idx]); 1712393ff91fSJaegeuk Kim sum_entry->nid = rn->footer.nid; 1713393ff91fSJaegeuk Kim sum_entry->version = 0; 1714393ff91fSJaegeuk Kim sum_entry->ofs_in_node = 0; 17159af0ff1cSChao Yu sum_entry++; 1716e05df3b1SJaegeuk Kim } 1717bac4eef6SChao Yu unlock_page(pages[idx]); 1718d653788aSGu Zheng skip: 1719bac4eef6SChao Yu page_cache_release(pages[idx]); 17209af0ff1cSChao Yu } 1721bac4eef6SChao Yu 1722bac4eef6SChao Yu invalidate_mapping_pages(inode->i_mapping, addr, 1723bac4eef6SChao Yu addr + nrpages); 17249af0ff1cSChao Yu } 17259af0ff1cSChao Yu return err; 1726e05df3b1SJaegeuk Kim } 1727e05df3b1SJaegeuk Kim 1728aec71382SChao Yu static struct nat_entry_set *grab_nat_entry_set(void) 1729aec71382SChao Yu { 1730aec71382SChao Yu struct nat_entry_set *nes = 1731aec71382SChao Yu f2fs_kmem_cache_alloc(nat_entry_set_slab, GFP_ATOMIC); 1732aec71382SChao Yu 1733aec71382SChao Yu nes->entry_cnt = 0; 1734aec71382SChao Yu INIT_LIST_HEAD(&nes->set_list); 1735aec71382SChao Yu INIT_LIST_HEAD(&nes->entry_list); 1736aec71382SChao Yu return nes; 1737aec71382SChao Yu } 1738aec71382SChao Yu 1739aec71382SChao Yu static void release_nat_entry_set(struct nat_entry_set *nes, 1740aec71382SChao Yu struct f2fs_nm_info *nm_i) 1741aec71382SChao Yu { 1742aec71382SChao Yu nm_i->dirty_nat_cnt -= nes->entry_cnt; 1743aec71382SChao Yu list_del(&nes->set_list); 1744aec71382SChao Yu kmem_cache_free(nat_entry_set_slab, nes); 1745aec71382SChao Yu } 1746aec71382SChao Yu 1747aec71382SChao Yu static void adjust_nat_entry_set(struct nat_entry_set *nes, 1748aec71382SChao Yu struct list_head *head) 1749aec71382SChao Yu { 1750aec71382SChao Yu struct nat_entry_set *next = nes; 1751aec71382SChao Yu 1752aec71382SChao Yu if (list_is_last(&nes->set_list, head)) 1753aec71382SChao Yu return; 1754aec71382SChao Yu 1755aec71382SChao Yu list_for_each_entry_continue(next, head, set_list) 1756aec71382SChao Yu if (nes->entry_cnt <= next->entry_cnt) 1757aec71382SChao Yu break; 1758aec71382SChao Yu 1759aec71382SChao Yu list_move_tail(&nes->set_list, &next->set_list); 1760aec71382SChao Yu } 1761aec71382SChao Yu 1762aec71382SChao Yu static void add_nat_entry(struct nat_entry *ne, struct list_head *head) 1763aec71382SChao Yu { 1764aec71382SChao Yu struct nat_entry_set *nes; 1765aec71382SChao Yu nid_t start_nid = START_NID(ne->ni.nid); 1766aec71382SChao Yu 1767aec71382SChao Yu list_for_each_entry(nes, head, set_list) { 1768aec71382SChao Yu if (nes->start_nid == start_nid) { 1769aec71382SChao Yu list_move_tail(&ne->list, &nes->entry_list); 1770aec71382SChao Yu nes->entry_cnt++; 1771aec71382SChao Yu adjust_nat_entry_set(nes, head); 1772aec71382SChao Yu return; 1773aec71382SChao Yu } 1774aec71382SChao Yu } 1775aec71382SChao Yu 1776aec71382SChao Yu nes = grab_nat_entry_set(); 1777aec71382SChao Yu 1778aec71382SChao Yu nes->start_nid = start_nid; 1779aec71382SChao Yu list_move_tail(&ne->list, &nes->entry_list); 1780aec71382SChao Yu nes->entry_cnt++; 1781aec71382SChao Yu list_add(&nes->set_list, head); 1782aec71382SChao Yu } 1783aec71382SChao Yu 1784aec71382SChao Yu static void merge_nats_in_set(struct f2fs_sb_info *sbi) 1785aec71382SChao Yu { 1786aec71382SChao Yu struct f2fs_nm_info *nm_i = NM_I(sbi); 1787aec71382SChao Yu struct list_head *dirty_list = &nm_i->dirty_nat_entries; 1788aec71382SChao Yu struct list_head *set_list = &nm_i->nat_entry_set; 1789aec71382SChao Yu struct nat_entry *ne, *tmp; 1790aec71382SChao Yu 1791aec71382SChao Yu write_lock(&nm_i->nat_tree_lock); 1792aec71382SChao Yu list_for_each_entry_safe(ne, tmp, dirty_list, list) { 1793aec71382SChao Yu if (nat_get_blkaddr(ne) == NEW_ADDR) 1794aec71382SChao Yu continue; 1795aec71382SChao Yu add_nat_entry(ne, set_list); 1796aec71382SChao Yu nm_i->dirty_nat_cnt++; 1797aec71382SChao Yu } 1798aec71382SChao Yu write_unlock(&nm_i->nat_tree_lock); 1799aec71382SChao Yu } 1800aec71382SChao Yu 1801aec71382SChao Yu static bool __has_cursum_space(struct f2fs_summary_block *sum, int size) 1802aec71382SChao Yu { 1803aec71382SChao Yu if (nats_in_cursum(sum) + size <= NAT_JOURNAL_ENTRIES) 1804aec71382SChao Yu return true; 1805aec71382SChao Yu else 1806aec71382SChao Yu return false; 1807aec71382SChao Yu } 1808aec71382SChao Yu 1809aec71382SChao Yu static void remove_nats_in_journal(struct f2fs_sb_info *sbi) 1810e05df3b1SJaegeuk Kim { 1811e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1812e05df3b1SJaegeuk Kim struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); 1813e05df3b1SJaegeuk Kim struct f2fs_summary_block *sum = curseg->sum_blk; 1814e05df3b1SJaegeuk Kim int i; 1815e05df3b1SJaegeuk Kim 1816e05df3b1SJaegeuk Kim mutex_lock(&curseg->curseg_mutex); 1817e05df3b1SJaegeuk Kim for (i = 0; i < nats_in_cursum(sum); i++) { 1818e05df3b1SJaegeuk Kim struct nat_entry *ne; 1819e05df3b1SJaegeuk Kim struct f2fs_nat_entry raw_ne; 1820e05df3b1SJaegeuk Kim nid_t nid = le32_to_cpu(nid_in_journal(sum, i)); 1821e05df3b1SJaegeuk Kim 1822e05df3b1SJaegeuk Kim raw_ne = nat_in_journal(sum, i); 1823e05df3b1SJaegeuk Kim retry: 1824e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 1825e05df3b1SJaegeuk Kim ne = __lookup_nat_cache(nm_i, nid); 1826aec71382SChao Yu if (ne) 1827aec71382SChao Yu goto found; 1828aec71382SChao Yu 1829e05df3b1SJaegeuk Kim ne = grab_nat_entry(nm_i, nid); 1830e05df3b1SJaegeuk Kim if (!ne) { 1831e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 1832e05df3b1SJaegeuk Kim goto retry; 1833e05df3b1SJaegeuk Kim } 183494dac22eSChao Yu node_info_from_raw_nat(&ne->ni, &raw_ne); 1835aec71382SChao Yu found: 1836e05df3b1SJaegeuk Kim __set_nat_cache_dirty(nm_i, ne); 1837e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 1838e05df3b1SJaegeuk Kim } 1839e05df3b1SJaegeuk Kim update_nats_in_cursum(sum, -i); 1840e05df3b1SJaegeuk Kim mutex_unlock(&curseg->curseg_mutex); 1841e05df3b1SJaegeuk Kim } 1842e05df3b1SJaegeuk Kim 18430a8165d7SJaegeuk Kim /* 1844e05df3b1SJaegeuk Kim * This function is called during the checkpointing process. 1845e05df3b1SJaegeuk Kim */ 1846e05df3b1SJaegeuk Kim void flush_nat_entries(struct f2fs_sb_info *sbi) 1847e05df3b1SJaegeuk Kim { 1848e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1849e05df3b1SJaegeuk Kim struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); 1850e05df3b1SJaegeuk Kim struct f2fs_summary_block *sum = curseg->sum_blk; 1851aec71382SChao Yu struct nat_entry_set *nes, *tmp; 1852aec71382SChao Yu struct list_head *head = &nm_i->nat_entry_set; 1853aec71382SChao Yu bool to_journal = true; 1854e05df3b1SJaegeuk Kim 1855aec71382SChao Yu /* merge nat entries of dirty list to nat entry set temporarily */ 1856aec71382SChao Yu merge_nats_in_set(sbi); 1857e05df3b1SJaegeuk Kim 1858e05df3b1SJaegeuk Kim /* 1859aec71382SChao Yu * if there are no enough space in journal to store dirty nat 1860aec71382SChao Yu * entries, remove all entries from journal and merge them 1861aec71382SChao Yu * into nat entry set. 1862e05df3b1SJaegeuk Kim */ 1863aec71382SChao Yu if (!__has_cursum_space(sum, nm_i->dirty_nat_cnt)) { 1864aec71382SChao Yu remove_nats_in_journal(sbi); 1865aec71382SChao Yu 1866aec71382SChao Yu /* 1867aec71382SChao Yu * merge nat entries of dirty list to nat entry set temporarily 1868aec71382SChao Yu */ 1869aec71382SChao Yu merge_nats_in_set(sbi); 1870aec71382SChao Yu } 1871aec71382SChao Yu 1872aec71382SChao Yu if (!nm_i->dirty_nat_cnt) 1873aec71382SChao Yu return; 1874aec71382SChao Yu 1875aec71382SChao Yu /* 1876aec71382SChao Yu * there are two steps to flush nat entries: 1877aec71382SChao Yu * #1, flush nat entries to journal in current hot data summary block. 1878aec71382SChao Yu * #2, flush nat entries to nat page. 1879aec71382SChao Yu */ 1880aec71382SChao Yu list_for_each_entry_safe(nes, tmp, head, set_list) { 1881aec71382SChao Yu struct f2fs_nat_block *nat_blk; 1882aec71382SChao Yu struct nat_entry *ne, *cur; 1883aec71382SChao Yu struct page *page; 1884aec71382SChao Yu nid_t start_nid = nes->start_nid; 1885aec71382SChao Yu 1886aec71382SChao Yu if (to_journal && !__has_cursum_space(sum, nes->entry_cnt)) 1887aec71382SChao Yu to_journal = false; 1888aec71382SChao Yu 1889aec71382SChao Yu if (to_journal) { 1890aec71382SChao Yu mutex_lock(&curseg->curseg_mutex); 1891aec71382SChao Yu } else { 1892e05df3b1SJaegeuk Kim page = get_next_nat_page(sbi, start_nid); 1893e05df3b1SJaegeuk Kim nat_blk = page_address(page); 18949850cf4aSJaegeuk Kim f2fs_bug_on(sbi, !nat_blk); 1895e05df3b1SJaegeuk Kim } 1896e05df3b1SJaegeuk Kim 1897aec71382SChao Yu /* flush dirty nats in nat entry set */ 1898aec71382SChao Yu list_for_each_entry_safe(ne, cur, &nes->entry_list, list) { 1899aec71382SChao Yu struct f2fs_nat_entry *raw_ne; 1900aec71382SChao Yu nid_t nid = nat_get_nid(ne); 1901aec71382SChao Yu int offset; 1902aec71382SChao Yu 1903aec71382SChao Yu if (to_journal) { 1904aec71382SChao Yu offset = lookup_journal_in_cursum(sum, 1905aec71382SChao Yu NAT_JOURNAL, nid, 1); 19069850cf4aSJaegeuk Kim f2fs_bug_on(sbi, offset < 0); 1907aec71382SChao Yu raw_ne = &nat_in_journal(sum, offset); 1908aec71382SChao Yu nid_in_journal(sum, offset) = cpu_to_le32(nid); 1909aec71382SChao Yu } else { 1910aec71382SChao Yu raw_ne = &nat_blk->entries[nid - start_nid]; 1911aec71382SChao Yu } 1912aec71382SChao Yu raw_nat_from_node_info(raw_ne, &ne->ni); 1913aec71382SChao Yu 1914fa372417SJaegeuk Kim if (nat_get_blkaddr(ne) == NULL_ADDR && 19156fb03f3aSJaegeuk Kim add_free_nid(sbi, nid, false) <= 0) { 1916e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 1917e05df3b1SJaegeuk Kim __del_from_nat_cache(nm_i, ne); 1918e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 1919e05df3b1SJaegeuk Kim } else { 1920e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 1921e05df3b1SJaegeuk Kim __clear_nat_cache_dirty(nm_i, ne); 1922e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 1923e05df3b1SJaegeuk Kim } 1924e05df3b1SJaegeuk Kim } 1925aec71382SChao Yu 1926aec71382SChao Yu if (to_journal) 1927e05df3b1SJaegeuk Kim mutex_unlock(&curseg->curseg_mutex); 1928aec71382SChao Yu else 1929e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 1930aec71382SChao Yu 19319850cf4aSJaegeuk Kim f2fs_bug_on(sbi, !list_empty(&nes->entry_list)); 1932aec71382SChao Yu release_nat_entry_set(nes, nm_i); 1933aec71382SChao Yu } 1934aec71382SChao Yu 19359850cf4aSJaegeuk Kim f2fs_bug_on(sbi, !list_empty(head)); 19369850cf4aSJaegeuk Kim f2fs_bug_on(sbi, nm_i->dirty_nat_cnt); 1937e05df3b1SJaegeuk Kim } 1938e05df3b1SJaegeuk Kim 1939e05df3b1SJaegeuk Kim static int init_node_manager(struct f2fs_sb_info *sbi) 1940e05df3b1SJaegeuk Kim { 1941e05df3b1SJaegeuk Kim struct f2fs_super_block *sb_raw = F2FS_RAW_SUPER(sbi); 1942e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1943e05df3b1SJaegeuk Kim unsigned char *version_bitmap; 1944e05df3b1SJaegeuk Kim unsigned int nat_segs, nat_blocks; 1945e05df3b1SJaegeuk Kim 1946e05df3b1SJaegeuk Kim nm_i->nat_blkaddr = le32_to_cpu(sb_raw->nat_blkaddr); 1947e05df3b1SJaegeuk Kim 1948e05df3b1SJaegeuk Kim /* segment_count_nat includes pair segment so divide to 2. */ 1949e05df3b1SJaegeuk Kim nat_segs = le32_to_cpu(sb_raw->segment_count_nat) >> 1; 1950e05df3b1SJaegeuk Kim nat_blocks = nat_segs << le32_to_cpu(sb_raw->log_blocks_per_seg); 1951b63da15eSJaegeuk Kim 19527ee0eeabSJaegeuk Kim nm_i->max_nid = NAT_ENTRY_PER_BLOCK * nat_blocks; 19537ee0eeabSJaegeuk Kim 1954b63da15eSJaegeuk Kim /* not used nids: 0, node, meta, (and root counted as valid node) */ 1955c200b1aaSChao Yu nm_i->available_nids = nm_i->max_nid - F2FS_RESERVED_NODE_NUM; 1956e05df3b1SJaegeuk Kim nm_i->fcnt = 0; 1957e05df3b1SJaegeuk Kim nm_i->nat_cnt = 0; 1958cdfc41c1SJaegeuk Kim nm_i->ram_thresh = DEF_RAM_THRESHOLD; 1959e05df3b1SJaegeuk Kim 19608a7ed66aSJaegeuk Kim INIT_RADIX_TREE(&nm_i->free_nid_root, GFP_ATOMIC); 1961e05df3b1SJaegeuk Kim INIT_LIST_HEAD(&nm_i->free_nid_list); 1962e05df3b1SJaegeuk Kim INIT_RADIX_TREE(&nm_i->nat_root, GFP_ATOMIC); 1963e05df3b1SJaegeuk Kim INIT_LIST_HEAD(&nm_i->nat_entries); 1964e05df3b1SJaegeuk Kim INIT_LIST_HEAD(&nm_i->dirty_nat_entries); 1965aec71382SChao Yu INIT_LIST_HEAD(&nm_i->nat_entry_set); 1966e05df3b1SJaegeuk Kim 1967e05df3b1SJaegeuk Kim mutex_init(&nm_i->build_lock); 1968e05df3b1SJaegeuk Kim spin_lock_init(&nm_i->free_nid_list_lock); 1969e05df3b1SJaegeuk Kim rwlock_init(&nm_i->nat_tree_lock); 1970e05df3b1SJaegeuk Kim 1971e05df3b1SJaegeuk Kim nm_i->next_scan_nid = le32_to_cpu(sbi->ckpt->next_free_nid); 197279b5793bSAlexandru Gheorghiu nm_i->bitmap_size = __bitmap_size(sbi, NAT_BITMAP); 1973e05df3b1SJaegeuk Kim version_bitmap = __bitmap_ptr(sbi, NAT_BITMAP); 1974e05df3b1SJaegeuk Kim if (!version_bitmap) 1975e05df3b1SJaegeuk Kim return -EFAULT; 1976e05df3b1SJaegeuk Kim 197779b5793bSAlexandru Gheorghiu nm_i->nat_bitmap = kmemdup(version_bitmap, nm_i->bitmap_size, 197879b5793bSAlexandru Gheorghiu GFP_KERNEL); 197979b5793bSAlexandru Gheorghiu if (!nm_i->nat_bitmap) 198079b5793bSAlexandru Gheorghiu return -ENOMEM; 1981e05df3b1SJaegeuk Kim return 0; 1982e05df3b1SJaegeuk Kim } 1983e05df3b1SJaegeuk Kim 1984e05df3b1SJaegeuk Kim int build_node_manager(struct f2fs_sb_info *sbi) 1985e05df3b1SJaegeuk Kim { 1986e05df3b1SJaegeuk Kim int err; 1987e05df3b1SJaegeuk Kim 1988e05df3b1SJaegeuk Kim sbi->nm_info = kzalloc(sizeof(struct f2fs_nm_info), GFP_KERNEL); 1989e05df3b1SJaegeuk Kim if (!sbi->nm_info) 1990e05df3b1SJaegeuk Kim return -ENOMEM; 1991e05df3b1SJaegeuk Kim 1992e05df3b1SJaegeuk Kim err = init_node_manager(sbi); 1993e05df3b1SJaegeuk Kim if (err) 1994e05df3b1SJaegeuk Kim return err; 1995e05df3b1SJaegeuk Kim 1996e05df3b1SJaegeuk Kim build_free_nids(sbi); 1997e05df3b1SJaegeuk Kim return 0; 1998e05df3b1SJaegeuk Kim } 1999e05df3b1SJaegeuk Kim 2000e05df3b1SJaegeuk Kim void destroy_node_manager(struct f2fs_sb_info *sbi) 2001e05df3b1SJaegeuk Kim { 2002e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 2003e05df3b1SJaegeuk Kim struct free_nid *i, *next_i; 2004e05df3b1SJaegeuk Kim struct nat_entry *natvec[NATVEC_SIZE]; 2005e05df3b1SJaegeuk Kim nid_t nid = 0; 2006e05df3b1SJaegeuk Kim unsigned int found; 2007e05df3b1SJaegeuk Kim 2008e05df3b1SJaegeuk Kim if (!nm_i) 2009e05df3b1SJaegeuk Kim return; 2010e05df3b1SJaegeuk Kim 2011e05df3b1SJaegeuk Kim /* destroy free nid list */ 2012e05df3b1SJaegeuk Kim spin_lock(&nm_i->free_nid_list_lock); 2013e05df3b1SJaegeuk Kim list_for_each_entry_safe(i, next_i, &nm_i->free_nid_list, list) { 20149850cf4aSJaegeuk Kim f2fs_bug_on(sbi, i->state == NID_ALLOC); 20158a7ed66aSJaegeuk Kim __del_from_free_nid_list(nm_i, i); 2016e05df3b1SJaegeuk Kim nm_i->fcnt--; 2017cf0ee0f0SChao Yu spin_unlock(&nm_i->free_nid_list_lock); 2018cf0ee0f0SChao Yu kmem_cache_free(free_nid_slab, i); 2019cf0ee0f0SChao Yu spin_lock(&nm_i->free_nid_list_lock); 2020e05df3b1SJaegeuk Kim } 20219850cf4aSJaegeuk Kim f2fs_bug_on(sbi, nm_i->fcnt); 2022e05df3b1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 2023e05df3b1SJaegeuk Kim 2024e05df3b1SJaegeuk Kim /* destroy nat cache */ 2025e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 2026e05df3b1SJaegeuk Kim while ((found = __gang_lookup_nat_cache(nm_i, 2027e05df3b1SJaegeuk Kim nid, NATVEC_SIZE, natvec))) { 2028e05df3b1SJaegeuk Kim unsigned idx; 2029b6ce391eSGu Zheng nid = nat_get_nid(natvec[found - 1]) + 1; 2030b6ce391eSGu Zheng for (idx = 0; idx < found; idx++) 2031b6ce391eSGu Zheng __del_from_nat_cache(nm_i, natvec[idx]); 2032e05df3b1SJaegeuk Kim } 20339850cf4aSJaegeuk Kim f2fs_bug_on(sbi, nm_i->nat_cnt); 2034e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 2035e05df3b1SJaegeuk Kim 2036e05df3b1SJaegeuk Kim kfree(nm_i->nat_bitmap); 2037e05df3b1SJaegeuk Kim sbi->nm_info = NULL; 2038e05df3b1SJaegeuk Kim kfree(nm_i); 2039e05df3b1SJaegeuk Kim } 2040e05df3b1SJaegeuk Kim 20416e6093a8SNamjae Jeon int __init create_node_manager_caches(void) 2042e05df3b1SJaegeuk Kim { 2043e05df3b1SJaegeuk Kim nat_entry_slab = f2fs_kmem_cache_create("nat_entry", 2044e8512d2eSGu Zheng sizeof(struct nat_entry)); 2045e05df3b1SJaegeuk Kim if (!nat_entry_slab) 2046aec71382SChao Yu goto fail; 2047e05df3b1SJaegeuk Kim 2048e05df3b1SJaegeuk Kim free_nid_slab = f2fs_kmem_cache_create("free_nid", 2049e8512d2eSGu Zheng sizeof(struct free_nid)); 2050aec71382SChao Yu if (!free_nid_slab) 2051aec71382SChao Yu goto destory_nat_entry; 2052aec71382SChao Yu 2053aec71382SChao Yu nat_entry_set_slab = f2fs_kmem_cache_create("nat_entry_set", 2054aec71382SChao Yu sizeof(struct nat_entry_set)); 2055aec71382SChao Yu if (!nat_entry_set_slab) 2056aec71382SChao Yu goto destory_free_nid; 2057e05df3b1SJaegeuk Kim return 0; 2058aec71382SChao Yu 2059aec71382SChao Yu destory_free_nid: 2060aec71382SChao Yu kmem_cache_destroy(free_nid_slab); 2061aec71382SChao Yu destory_nat_entry: 2062aec71382SChao Yu kmem_cache_destroy(nat_entry_slab); 2063aec71382SChao Yu fail: 2064aec71382SChao Yu return -ENOMEM; 2065e05df3b1SJaegeuk Kim } 2066e05df3b1SJaegeuk Kim 2067e05df3b1SJaegeuk Kim void destroy_node_manager_caches(void) 2068e05df3b1SJaegeuk Kim { 2069aec71382SChao Yu kmem_cache_destroy(nat_entry_set_slab); 2070e05df3b1SJaegeuk Kim kmem_cache_destroy(free_nid_slab); 2071e05df3b1SJaegeuk Kim kmem_cache_destroy(nat_entry_slab); 2072e05df3b1SJaegeuk Kim } 2073