10a8165d7SJaegeuk Kim /* 2e05df3b1SJaegeuk Kim * fs/f2fs/node.c 3e05df3b1SJaegeuk Kim * 4e05df3b1SJaegeuk Kim * Copyright (c) 2012 Samsung Electronics Co., Ltd. 5e05df3b1SJaegeuk Kim * http://www.samsung.com/ 6e05df3b1SJaegeuk Kim * 7e05df3b1SJaegeuk Kim * This program is free software; you can redistribute it and/or modify 8e05df3b1SJaegeuk Kim * it under the terms of the GNU General Public License version 2 as 9e05df3b1SJaegeuk Kim * published by the Free Software Foundation. 10e05df3b1SJaegeuk Kim */ 11e05df3b1SJaegeuk Kim #include <linux/fs.h> 12e05df3b1SJaegeuk Kim #include <linux/f2fs_fs.h> 13e05df3b1SJaegeuk Kim #include <linux/mpage.h> 14e05df3b1SJaegeuk Kim #include <linux/backing-dev.h> 15e05df3b1SJaegeuk Kim #include <linux/blkdev.h> 16e05df3b1SJaegeuk Kim #include <linux/pagevec.h> 17e05df3b1SJaegeuk Kim #include <linux/swap.h> 18e05df3b1SJaegeuk Kim 19e05df3b1SJaegeuk Kim #include "f2fs.h" 20e05df3b1SJaegeuk Kim #include "node.h" 21e05df3b1SJaegeuk Kim #include "segment.h" 2251dd6249SNamjae Jeon #include <trace/events/f2fs.h> 23e05df3b1SJaegeuk Kim 24f978f5a0SGu Zheng #define on_build_free_nids(nmi) mutex_is_locked(&nm_i->build_lock) 25f978f5a0SGu Zheng 26e05df3b1SJaegeuk Kim static struct kmem_cache *nat_entry_slab; 27e05df3b1SJaegeuk Kim static struct kmem_cache *free_nid_slab; 28e05df3b1SJaegeuk Kim 29cdfc41c1SJaegeuk Kim static inline bool available_free_memory(struct f2fs_nm_info *nm_i, int type) 30cdfc41c1SJaegeuk Kim { 31cdfc41c1SJaegeuk Kim struct sysinfo val; 32cdfc41c1SJaegeuk Kim unsigned long mem_size = 0; 33cdfc41c1SJaegeuk Kim 34cdfc41c1SJaegeuk Kim si_meminfo(&val); 35cdfc41c1SJaegeuk Kim if (type == FREE_NIDS) 36cdfc41c1SJaegeuk Kim mem_size = nm_i->fcnt * sizeof(struct free_nid); 37cdfc41c1SJaegeuk Kim else if (type == NAT_ENTRIES) 38cdfc41c1SJaegeuk Kim mem_size += nm_i->nat_cnt * sizeof(struct nat_entry); 39cdfc41c1SJaegeuk Kim mem_size >>= 12; 40cdfc41c1SJaegeuk Kim 41cdfc41c1SJaegeuk Kim /* give 50:50 memory for free nids and nat caches respectively */ 42cdfc41c1SJaegeuk Kim return (mem_size < ((val.totalram * nm_i->ram_thresh) >> 11)); 43cdfc41c1SJaegeuk Kim } 44cdfc41c1SJaegeuk Kim 45e05df3b1SJaegeuk Kim static void clear_node_page_dirty(struct page *page) 46e05df3b1SJaegeuk Kim { 47e05df3b1SJaegeuk Kim struct address_space *mapping = page->mapping; 48e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(mapping->host->i_sb); 49e05df3b1SJaegeuk Kim unsigned int long flags; 50e05df3b1SJaegeuk Kim 51e05df3b1SJaegeuk Kim if (PageDirty(page)) { 52e05df3b1SJaegeuk Kim spin_lock_irqsave(&mapping->tree_lock, flags); 53e05df3b1SJaegeuk Kim radix_tree_tag_clear(&mapping->page_tree, 54e05df3b1SJaegeuk Kim page_index(page), 55e05df3b1SJaegeuk Kim PAGECACHE_TAG_DIRTY); 56e05df3b1SJaegeuk Kim spin_unlock_irqrestore(&mapping->tree_lock, flags); 57e05df3b1SJaegeuk Kim 58e05df3b1SJaegeuk Kim clear_page_dirty_for_io(page); 59e05df3b1SJaegeuk Kim dec_page_count(sbi, F2FS_DIRTY_NODES); 60e05df3b1SJaegeuk Kim } 61e05df3b1SJaegeuk Kim ClearPageUptodate(page); 62e05df3b1SJaegeuk Kim } 63e05df3b1SJaegeuk Kim 64e05df3b1SJaegeuk Kim static struct page *get_current_nat_page(struct f2fs_sb_info *sbi, nid_t nid) 65e05df3b1SJaegeuk Kim { 66e05df3b1SJaegeuk Kim pgoff_t index = current_nat_addr(sbi, nid); 67e05df3b1SJaegeuk Kim return get_meta_page(sbi, index); 68e05df3b1SJaegeuk Kim } 69e05df3b1SJaegeuk Kim 70e05df3b1SJaegeuk Kim static struct page *get_next_nat_page(struct f2fs_sb_info *sbi, nid_t nid) 71e05df3b1SJaegeuk Kim { 72e05df3b1SJaegeuk Kim struct page *src_page; 73e05df3b1SJaegeuk Kim struct page *dst_page; 74e05df3b1SJaegeuk Kim pgoff_t src_off; 75e05df3b1SJaegeuk Kim pgoff_t dst_off; 76e05df3b1SJaegeuk Kim void *src_addr; 77e05df3b1SJaegeuk Kim void *dst_addr; 78e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 79e05df3b1SJaegeuk Kim 80e05df3b1SJaegeuk Kim src_off = current_nat_addr(sbi, nid); 81e05df3b1SJaegeuk Kim dst_off = next_nat_addr(sbi, src_off); 82e05df3b1SJaegeuk Kim 83e05df3b1SJaegeuk Kim /* get current nat block page with lock */ 84e05df3b1SJaegeuk Kim src_page = get_meta_page(sbi, src_off); 85e05df3b1SJaegeuk Kim 86e05df3b1SJaegeuk Kim /* Dirty src_page means that it is already the new target NAT page. */ 87e05df3b1SJaegeuk Kim if (PageDirty(src_page)) 88e05df3b1SJaegeuk Kim return src_page; 89e05df3b1SJaegeuk Kim 90e05df3b1SJaegeuk Kim dst_page = grab_meta_page(sbi, dst_off); 91e05df3b1SJaegeuk Kim 92e05df3b1SJaegeuk Kim src_addr = page_address(src_page); 93e05df3b1SJaegeuk Kim dst_addr = page_address(dst_page); 94e05df3b1SJaegeuk Kim memcpy(dst_addr, src_addr, PAGE_CACHE_SIZE); 95e05df3b1SJaegeuk Kim set_page_dirty(dst_page); 96e05df3b1SJaegeuk Kim f2fs_put_page(src_page, 1); 97e05df3b1SJaegeuk Kim 98e05df3b1SJaegeuk Kim set_to_next_nat(nm_i, nid); 99e05df3b1SJaegeuk Kim 100e05df3b1SJaegeuk Kim return dst_page; 101e05df3b1SJaegeuk Kim } 102e05df3b1SJaegeuk Kim 103e05df3b1SJaegeuk Kim static struct nat_entry *__lookup_nat_cache(struct f2fs_nm_info *nm_i, nid_t n) 104e05df3b1SJaegeuk Kim { 105e05df3b1SJaegeuk Kim return radix_tree_lookup(&nm_i->nat_root, n); 106e05df3b1SJaegeuk Kim } 107e05df3b1SJaegeuk Kim 108e05df3b1SJaegeuk Kim static unsigned int __gang_lookup_nat_cache(struct f2fs_nm_info *nm_i, 109e05df3b1SJaegeuk Kim nid_t start, unsigned int nr, struct nat_entry **ep) 110e05df3b1SJaegeuk Kim { 111e05df3b1SJaegeuk Kim return radix_tree_gang_lookup(&nm_i->nat_root, (void **)ep, start, nr); 112e05df3b1SJaegeuk Kim } 113e05df3b1SJaegeuk Kim 114e05df3b1SJaegeuk Kim static void __del_from_nat_cache(struct f2fs_nm_info *nm_i, struct nat_entry *e) 115e05df3b1SJaegeuk Kim { 116e05df3b1SJaegeuk Kim list_del(&e->list); 117e05df3b1SJaegeuk Kim radix_tree_delete(&nm_i->nat_root, nat_get_nid(e)); 118e05df3b1SJaegeuk Kim nm_i->nat_cnt--; 119e05df3b1SJaegeuk Kim kmem_cache_free(nat_entry_slab, e); 120e05df3b1SJaegeuk Kim } 121e05df3b1SJaegeuk Kim 122e05df3b1SJaegeuk Kim int is_checkpointed_node(struct f2fs_sb_info *sbi, nid_t nid) 123e05df3b1SJaegeuk Kim { 124e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 125e05df3b1SJaegeuk Kim struct nat_entry *e; 126e05df3b1SJaegeuk Kim int is_cp = 1; 127e05df3b1SJaegeuk Kim 128e05df3b1SJaegeuk Kim read_lock(&nm_i->nat_tree_lock); 129e05df3b1SJaegeuk Kim e = __lookup_nat_cache(nm_i, nid); 130e05df3b1SJaegeuk Kim if (e && !e->checkpointed) 131e05df3b1SJaegeuk Kim is_cp = 0; 132e05df3b1SJaegeuk Kim read_unlock(&nm_i->nat_tree_lock); 133e05df3b1SJaegeuk Kim return is_cp; 134e05df3b1SJaegeuk Kim } 135e05df3b1SJaegeuk Kim 136479f40c4SJaegeuk Kim bool fsync_mark_done(struct f2fs_sb_info *sbi, nid_t nid) 137479f40c4SJaegeuk Kim { 138479f40c4SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 139479f40c4SJaegeuk Kim struct nat_entry *e; 140479f40c4SJaegeuk Kim bool fsync_done = false; 141479f40c4SJaegeuk Kim 142479f40c4SJaegeuk Kim read_lock(&nm_i->nat_tree_lock); 143479f40c4SJaegeuk Kim e = __lookup_nat_cache(nm_i, nid); 144479f40c4SJaegeuk Kim if (e) 145479f40c4SJaegeuk Kim fsync_done = e->fsync_done; 146479f40c4SJaegeuk Kim read_unlock(&nm_i->nat_tree_lock); 147479f40c4SJaegeuk Kim return fsync_done; 148479f40c4SJaegeuk Kim } 149479f40c4SJaegeuk Kim 150e05df3b1SJaegeuk Kim static struct nat_entry *grab_nat_entry(struct f2fs_nm_info *nm_i, nid_t nid) 151e05df3b1SJaegeuk Kim { 152e05df3b1SJaegeuk Kim struct nat_entry *new; 153e05df3b1SJaegeuk Kim 154e05df3b1SJaegeuk Kim new = kmem_cache_alloc(nat_entry_slab, GFP_ATOMIC); 155e05df3b1SJaegeuk Kim if (!new) 156e05df3b1SJaegeuk Kim return NULL; 157e05df3b1SJaegeuk Kim if (radix_tree_insert(&nm_i->nat_root, nid, new)) { 158e05df3b1SJaegeuk Kim kmem_cache_free(nat_entry_slab, new); 159e05df3b1SJaegeuk Kim return NULL; 160e05df3b1SJaegeuk Kim } 161e05df3b1SJaegeuk Kim memset(new, 0, sizeof(struct nat_entry)); 162e05df3b1SJaegeuk Kim nat_set_nid(new, nid); 163fffc2a00SJaegeuk Kim new->checkpointed = true; 164e05df3b1SJaegeuk Kim list_add_tail(&new->list, &nm_i->nat_entries); 165e05df3b1SJaegeuk Kim nm_i->nat_cnt++; 166e05df3b1SJaegeuk Kim return new; 167e05df3b1SJaegeuk Kim } 168e05df3b1SJaegeuk Kim 169e05df3b1SJaegeuk Kim static void cache_nat_entry(struct f2fs_nm_info *nm_i, nid_t nid, 170e05df3b1SJaegeuk Kim struct f2fs_nat_entry *ne) 171e05df3b1SJaegeuk Kim { 172e05df3b1SJaegeuk Kim struct nat_entry *e; 173e05df3b1SJaegeuk Kim retry: 174e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 175e05df3b1SJaegeuk Kim e = __lookup_nat_cache(nm_i, nid); 176e05df3b1SJaegeuk Kim if (!e) { 177e05df3b1SJaegeuk Kim e = grab_nat_entry(nm_i, nid); 178e05df3b1SJaegeuk Kim if (!e) { 179e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 180e05df3b1SJaegeuk Kim goto retry; 181e05df3b1SJaegeuk Kim } 182e05df3b1SJaegeuk Kim nat_set_blkaddr(e, le32_to_cpu(ne->block_addr)); 183e05df3b1SJaegeuk Kim nat_set_ino(e, le32_to_cpu(ne->ino)); 184e05df3b1SJaegeuk Kim nat_set_version(e, ne->version); 185e05df3b1SJaegeuk Kim } 186e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 187e05df3b1SJaegeuk Kim } 188e05df3b1SJaegeuk Kim 189e05df3b1SJaegeuk Kim static void set_node_addr(struct f2fs_sb_info *sbi, struct node_info *ni, 190479f40c4SJaegeuk Kim block_t new_blkaddr, bool fsync_done) 191e05df3b1SJaegeuk Kim { 192e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 193e05df3b1SJaegeuk Kim struct nat_entry *e; 194e05df3b1SJaegeuk Kim retry: 195e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 196e05df3b1SJaegeuk Kim e = __lookup_nat_cache(nm_i, ni->nid); 197e05df3b1SJaegeuk Kim if (!e) { 198e05df3b1SJaegeuk Kim e = grab_nat_entry(nm_i, ni->nid); 199e05df3b1SJaegeuk Kim if (!e) { 200e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 201e05df3b1SJaegeuk Kim goto retry; 202e05df3b1SJaegeuk Kim } 203e05df3b1SJaegeuk Kim e->ni = *ni; 2045d56b671SJaegeuk Kim f2fs_bug_on(ni->blk_addr == NEW_ADDR); 205e05df3b1SJaegeuk Kim } else if (new_blkaddr == NEW_ADDR) { 206e05df3b1SJaegeuk Kim /* 207e05df3b1SJaegeuk Kim * when nid is reallocated, 208e05df3b1SJaegeuk Kim * previous nat entry can be remained in nat cache. 209e05df3b1SJaegeuk Kim * So, reinitialize it with new information. 210e05df3b1SJaegeuk Kim */ 211e05df3b1SJaegeuk Kim e->ni = *ni; 2125d56b671SJaegeuk Kim f2fs_bug_on(ni->blk_addr != NULL_ADDR); 213e05df3b1SJaegeuk Kim } 214e05df3b1SJaegeuk Kim 215e05df3b1SJaegeuk Kim /* sanity check */ 2165d56b671SJaegeuk Kim f2fs_bug_on(nat_get_blkaddr(e) != ni->blk_addr); 2175d56b671SJaegeuk Kim f2fs_bug_on(nat_get_blkaddr(e) == NULL_ADDR && 218e05df3b1SJaegeuk Kim new_blkaddr == NULL_ADDR); 2195d56b671SJaegeuk Kim f2fs_bug_on(nat_get_blkaddr(e) == NEW_ADDR && 220e05df3b1SJaegeuk Kim new_blkaddr == NEW_ADDR); 2215d56b671SJaegeuk Kim f2fs_bug_on(nat_get_blkaddr(e) != NEW_ADDR && 222e05df3b1SJaegeuk Kim nat_get_blkaddr(e) != NULL_ADDR && 223e05df3b1SJaegeuk Kim new_blkaddr == NEW_ADDR); 224e05df3b1SJaegeuk Kim 225e05df3b1SJaegeuk Kim /* increament version no as node is removed */ 226e05df3b1SJaegeuk Kim if (nat_get_blkaddr(e) != NEW_ADDR && new_blkaddr == NULL_ADDR) { 227e05df3b1SJaegeuk Kim unsigned char version = nat_get_version(e); 228e05df3b1SJaegeuk Kim nat_set_version(e, inc_node_version(version)); 229e05df3b1SJaegeuk Kim } 230e05df3b1SJaegeuk Kim 231e05df3b1SJaegeuk Kim /* change address */ 232e05df3b1SJaegeuk Kim nat_set_blkaddr(e, new_blkaddr); 233e05df3b1SJaegeuk Kim __set_nat_cache_dirty(nm_i, e); 234479f40c4SJaegeuk Kim 235479f40c4SJaegeuk Kim /* update fsync_mark if its inode nat entry is still alive */ 236479f40c4SJaegeuk Kim e = __lookup_nat_cache(nm_i, ni->ino); 237479f40c4SJaegeuk Kim if (e) 238479f40c4SJaegeuk Kim e->fsync_done = fsync_done; 239e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 240e05df3b1SJaegeuk Kim } 241e05df3b1SJaegeuk Kim 2424660f9c0SJaegeuk Kim int try_to_free_nats(struct f2fs_sb_info *sbi, int nr_shrink) 243e05df3b1SJaegeuk Kim { 244e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 245e05df3b1SJaegeuk Kim 246a5f42010SJaegeuk Kim if (available_free_memory(nm_i, NAT_ENTRIES)) 247e05df3b1SJaegeuk Kim return 0; 248e05df3b1SJaegeuk Kim 249e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 250e05df3b1SJaegeuk Kim while (nr_shrink && !list_empty(&nm_i->nat_entries)) { 251e05df3b1SJaegeuk Kim struct nat_entry *ne; 252e05df3b1SJaegeuk Kim ne = list_first_entry(&nm_i->nat_entries, 253e05df3b1SJaegeuk Kim struct nat_entry, list); 254e05df3b1SJaegeuk Kim __del_from_nat_cache(nm_i, ne); 255e05df3b1SJaegeuk Kim nr_shrink--; 256e05df3b1SJaegeuk Kim } 257e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 258e05df3b1SJaegeuk Kim return nr_shrink; 259e05df3b1SJaegeuk Kim } 260e05df3b1SJaegeuk Kim 2610a8165d7SJaegeuk Kim /* 262e05df3b1SJaegeuk Kim * This function returns always success 263e05df3b1SJaegeuk Kim */ 264e05df3b1SJaegeuk Kim void get_node_info(struct f2fs_sb_info *sbi, nid_t nid, struct node_info *ni) 265e05df3b1SJaegeuk Kim { 266e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 267e05df3b1SJaegeuk Kim struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); 268e05df3b1SJaegeuk Kim struct f2fs_summary_block *sum = curseg->sum_blk; 269e05df3b1SJaegeuk Kim nid_t start_nid = START_NID(nid); 270e05df3b1SJaegeuk Kim struct f2fs_nat_block *nat_blk; 271e05df3b1SJaegeuk Kim struct page *page = NULL; 272e05df3b1SJaegeuk Kim struct f2fs_nat_entry ne; 273e05df3b1SJaegeuk Kim struct nat_entry *e; 274e05df3b1SJaegeuk Kim int i; 275e05df3b1SJaegeuk Kim 276be4124f8SNamjae Jeon memset(&ne, 0, sizeof(struct f2fs_nat_entry)); 277e05df3b1SJaegeuk Kim ni->nid = nid; 278e05df3b1SJaegeuk Kim 279e05df3b1SJaegeuk Kim /* Check nat cache */ 280e05df3b1SJaegeuk Kim read_lock(&nm_i->nat_tree_lock); 281e05df3b1SJaegeuk Kim e = __lookup_nat_cache(nm_i, nid); 282e05df3b1SJaegeuk Kim if (e) { 283e05df3b1SJaegeuk Kim ni->ino = nat_get_ino(e); 284e05df3b1SJaegeuk Kim ni->blk_addr = nat_get_blkaddr(e); 285e05df3b1SJaegeuk Kim ni->version = nat_get_version(e); 286e05df3b1SJaegeuk Kim } 287e05df3b1SJaegeuk Kim read_unlock(&nm_i->nat_tree_lock); 288e05df3b1SJaegeuk Kim if (e) 289e05df3b1SJaegeuk Kim return; 290e05df3b1SJaegeuk Kim 291e05df3b1SJaegeuk Kim /* Check current segment summary */ 292e05df3b1SJaegeuk Kim mutex_lock(&curseg->curseg_mutex); 293e05df3b1SJaegeuk Kim i = lookup_journal_in_cursum(sum, NAT_JOURNAL, nid, 0); 294e05df3b1SJaegeuk Kim if (i >= 0) { 295e05df3b1SJaegeuk Kim ne = nat_in_journal(sum, i); 296e05df3b1SJaegeuk Kim node_info_from_raw_nat(ni, &ne); 297e05df3b1SJaegeuk Kim } 298e05df3b1SJaegeuk Kim mutex_unlock(&curseg->curseg_mutex); 299e05df3b1SJaegeuk Kim if (i >= 0) 300e05df3b1SJaegeuk Kim goto cache; 301e05df3b1SJaegeuk Kim 302e05df3b1SJaegeuk Kim /* Fill node_info from nat page */ 303e05df3b1SJaegeuk Kim page = get_current_nat_page(sbi, start_nid); 304e05df3b1SJaegeuk Kim nat_blk = (struct f2fs_nat_block *)page_address(page); 305e05df3b1SJaegeuk Kim ne = nat_blk->entries[nid - start_nid]; 306e05df3b1SJaegeuk Kim node_info_from_raw_nat(ni, &ne); 307e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 308e05df3b1SJaegeuk Kim cache: 309e05df3b1SJaegeuk Kim /* cache nat entry */ 310e05df3b1SJaegeuk Kim cache_nat_entry(NM_I(sbi), nid, &ne); 311e05df3b1SJaegeuk Kim } 312e05df3b1SJaegeuk Kim 3130a8165d7SJaegeuk Kim /* 314e05df3b1SJaegeuk Kim * The maximum depth is four. 315e05df3b1SJaegeuk Kim * Offset[0] will have raw inode offset. 316e05df3b1SJaegeuk Kim */ 317de93653fSJaegeuk Kim static int get_node_path(struct f2fs_inode_info *fi, long block, 318de93653fSJaegeuk Kim int offset[4], unsigned int noffset[4]) 319e05df3b1SJaegeuk Kim { 320de93653fSJaegeuk Kim const long direct_index = ADDRS_PER_INODE(fi); 321e05df3b1SJaegeuk Kim const long direct_blks = ADDRS_PER_BLOCK; 322e05df3b1SJaegeuk Kim const long dptrs_per_blk = NIDS_PER_BLOCK; 323e05df3b1SJaegeuk Kim const long indirect_blks = ADDRS_PER_BLOCK * NIDS_PER_BLOCK; 324e05df3b1SJaegeuk Kim const long dindirect_blks = indirect_blks * NIDS_PER_BLOCK; 325e05df3b1SJaegeuk Kim int n = 0; 326e05df3b1SJaegeuk Kim int level = 0; 327e05df3b1SJaegeuk Kim 328e05df3b1SJaegeuk Kim noffset[0] = 0; 329e05df3b1SJaegeuk Kim 330e05df3b1SJaegeuk Kim if (block < direct_index) { 33125c0a6e5SNamjae Jeon offset[n] = block; 332e05df3b1SJaegeuk Kim goto got; 333e05df3b1SJaegeuk Kim } 334e05df3b1SJaegeuk Kim block -= direct_index; 335e05df3b1SJaegeuk Kim if (block < direct_blks) { 336e05df3b1SJaegeuk Kim offset[n++] = NODE_DIR1_BLOCK; 337e05df3b1SJaegeuk Kim noffset[n] = 1; 33825c0a6e5SNamjae Jeon offset[n] = block; 339e05df3b1SJaegeuk Kim level = 1; 340e05df3b1SJaegeuk Kim goto got; 341e05df3b1SJaegeuk Kim } 342e05df3b1SJaegeuk Kim block -= direct_blks; 343e05df3b1SJaegeuk Kim if (block < direct_blks) { 344e05df3b1SJaegeuk Kim offset[n++] = NODE_DIR2_BLOCK; 345e05df3b1SJaegeuk Kim noffset[n] = 2; 34625c0a6e5SNamjae Jeon offset[n] = block; 347e05df3b1SJaegeuk Kim level = 1; 348e05df3b1SJaegeuk Kim goto got; 349e05df3b1SJaegeuk Kim } 350e05df3b1SJaegeuk Kim block -= direct_blks; 351e05df3b1SJaegeuk Kim if (block < indirect_blks) { 352e05df3b1SJaegeuk Kim offset[n++] = NODE_IND1_BLOCK; 353e05df3b1SJaegeuk Kim noffset[n] = 3; 354e05df3b1SJaegeuk Kim offset[n++] = block / direct_blks; 355e05df3b1SJaegeuk Kim noffset[n] = 4 + offset[n - 1]; 35625c0a6e5SNamjae Jeon offset[n] = block % direct_blks; 357e05df3b1SJaegeuk Kim level = 2; 358e05df3b1SJaegeuk Kim goto got; 359e05df3b1SJaegeuk Kim } 360e05df3b1SJaegeuk Kim block -= indirect_blks; 361e05df3b1SJaegeuk Kim if (block < indirect_blks) { 362e05df3b1SJaegeuk Kim offset[n++] = NODE_IND2_BLOCK; 363e05df3b1SJaegeuk Kim noffset[n] = 4 + dptrs_per_blk; 364e05df3b1SJaegeuk Kim offset[n++] = block / direct_blks; 365e05df3b1SJaegeuk Kim noffset[n] = 5 + dptrs_per_blk + offset[n - 1]; 36625c0a6e5SNamjae Jeon offset[n] = block % direct_blks; 367e05df3b1SJaegeuk Kim level = 2; 368e05df3b1SJaegeuk Kim goto got; 369e05df3b1SJaegeuk Kim } 370e05df3b1SJaegeuk Kim block -= indirect_blks; 371e05df3b1SJaegeuk Kim if (block < dindirect_blks) { 372e05df3b1SJaegeuk Kim offset[n++] = NODE_DIND_BLOCK; 373e05df3b1SJaegeuk Kim noffset[n] = 5 + (dptrs_per_blk * 2); 374e05df3b1SJaegeuk Kim offset[n++] = block / indirect_blks; 375e05df3b1SJaegeuk Kim noffset[n] = 6 + (dptrs_per_blk * 2) + 376e05df3b1SJaegeuk Kim offset[n - 1] * (dptrs_per_blk + 1); 377e05df3b1SJaegeuk Kim offset[n++] = (block / direct_blks) % dptrs_per_blk; 378e05df3b1SJaegeuk Kim noffset[n] = 7 + (dptrs_per_blk * 2) + 379e05df3b1SJaegeuk Kim offset[n - 2] * (dptrs_per_blk + 1) + 380e05df3b1SJaegeuk Kim offset[n - 1]; 38125c0a6e5SNamjae Jeon offset[n] = block % direct_blks; 382e05df3b1SJaegeuk Kim level = 3; 383e05df3b1SJaegeuk Kim goto got; 384e05df3b1SJaegeuk Kim } else { 385e05df3b1SJaegeuk Kim BUG(); 386e05df3b1SJaegeuk Kim } 387e05df3b1SJaegeuk Kim got: 388e05df3b1SJaegeuk Kim return level; 389e05df3b1SJaegeuk Kim } 390e05df3b1SJaegeuk Kim 391e05df3b1SJaegeuk Kim /* 392e05df3b1SJaegeuk Kim * Caller should call f2fs_put_dnode(dn). 3934f4124d0SChao Yu * Also, it should grab and release a rwsem by calling f2fs_lock_op() and 3944f4124d0SChao Yu * f2fs_unlock_op() only if ro is not set RDONLY_NODE. 39539936837SJaegeuk Kim * In the case of RDONLY_NODE, we don't need to care about mutex. 396e05df3b1SJaegeuk Kim */ 397266e97a8SJaegeuk Kim int get_dnode_of_data(struct dnode_of_data *dn, pgoff_t index, int mode) 398e05df3b1SJaegeuk Kim { 399e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); 400e05df3b1SJaegeuk Kim struct page *npage[4]; 401e05df3b1SJaegeuk Kim struct page *parent; 402e05df3b1SJaegeuk Kim int offset[4]; 403e05df3b1SJaegeuk Kim unsigned int noffset[4]; 404e05df3b1SJaegeuk Kim nid_t nids[4]; 405e05df3b1SJaegeuk Kim int level, i; 406e05df3b1SJaegeuk Kim int err = 0; 407e05df3b1SJaegeuk Kim 408de93653fSJaegeuk Kim level = get_node_path(F2FS_I(dn->inode), index, offset, noffset); 409e05df3b1SJaegeuk Kim 410e05df3b1SJaegeuk Kim nids[0] = dn->inode->i_ino; 4111646cfacSJaegeuk Kim npage[0] = dn->inode_page; 4121646cfacSJaegeuk Kim 4131646cfacSJaegeuk Kim if (!npage[0]) { 414e05df3b1SJaegeuk Kim npage[0] = get_node_page(sbi, nids[0]); 415e05df3b1SJaegeuk Kim if (IS_ERR(npage[0])) 416e05df3b1SJaegeuk Kim return PTR_ERR(npage[0]); 4171646cfacSJaegeuk Kim } 418e05df3b1SJaegeuk Kim parent = npage[0]; 41952c2db3fSChangman Lee if (level != 0) 420e05df3b1SJaegeuk Kim nids[1] = get_nid(parent, offset[0], true); 421e05df3b1SJaegeuk Kim dn->inode_page = npage[0]; 422e05df3b1SJaegeuk Kim dn->inode_page_locked = true; 423e05df3b1SJaegeuk Kim 424e05df3b1SJaegeuk Kim /* get indirect or direct nodes */ 425e05df3b1SJaegeuk Kim for (i = 1; i <= level; i++) { 426e05df3b1SJaegeuk Kim bool done = false; 427e05df3b1SJaegeuk Kim 428266e97a8SJaegeuk Kim if (!nids[i] && mode == ALLOC_NODE) { 429e05df3b1SJaegeuk Kim /* alloc new node */ 430e05df3b1SJaegeuk Kim if (!alloc_nid(sbi, &(nids[i]))) { 431e05df3b1SJaegeuk Kim err = -ENOSPC; 432e05df3b1SJaegeuk Kim goto release_pages; 433e05df3b1SJaegeuk Kim } 434e05df3b1SJaegeuk Kim 435e05df3b1SJaegeuk Kim dn->nid = nids[i]; 4368ae8f162SJaegeuk Kim npage[i] = new_node_page(dn, noffset[i], NULL); 437e05df3b1SJaegeuk Kim if (IS_ERR(npage[i])) { 438e05df3b1SJaegeuk Kim alloc_nid_failed(sbi, nids[i]); 439e05df3b1SJaegeuk Kim err = PTR_ERR(npage[i]); 440e05df3b1SJaegeuk Kim goto release_pages; 441e05df3b1SJaegeuk Kim } 442e05df3b1SJaegeuk Kim 443e05df3b1SJaegeuk Kim set_nid(parent, offset[i - 1], nids[i], i == 1); 444e05df3b1SJaegeuk Kim alloc_nid_done(sbi, nids[i]); 445e05df3b1SJaegeuk Kim done = true; 446266e97a8SJaegeuk Kim } else if (mode == LOOKUP_NODE_RA && i == level && level > 1) { 447e05df3b1SJaegeuk Kim npage[i] = get_node_page_ra(parent, offset[i - 1]); 448e05df3b1SJaegeuk Kim if (IS_ERR(npage[i])) { 449e05df3b1SJaegeuk Kim err = PTR_ERR(npage[i]); 450e05df3b1SJaegeuk Kim goto release_pages; 451e05df3b1SJaegeuk Kim } 452e05df3b1SJaegeuk Kim done = true; 453e05df3b1SJaegeuk Kim } 454e05df3b1SJaegeuk Kim if (i == 1) { 455e05df3b1SJaegeuk Kim dn->inode_page_locked = false; 456e05df3b1SJaegeuk Kim unlock_page(parent); 457e05df3b1SJaegeuk Kim } else { 458e05df3b1SJaegeuk Kim f2fs_put_page(parent, 1); 459e05df3b1SJaegeuk Kim } 460e05df3b1SJaegeuk Kim 461e05df3b1SJaegeuk Kim if (!done) { 462e05df3b1SJaegeuk Kim npage[i] = get_node_page(sbi, nids[i]); 463e05df3b1SJaegeuk Kim if (IS_ERR(npage[i])) { 464e05df3b1SJaegeuk Kim err = PTR_ERR(npage[i]); 465e05df3b1SJaegeuk Kim f2fs_put_page(npage[0], 0); 466e05df3b1SJaegeuk Kim goto release_out; 467e05df3b1SJaegeuk Kim } 468e05df3b1SJaegeuk Kim } 469e05df3b1SJaegeuk Kim if (i < level) { 470e05df3b1SJaegeuk Kim parent = npage[i]; 471e05df3b1SJaegeuk Kim nids[i + 1] = get_nid(parent, offset[i], false); 472e05df3b1SJaegeuk Kim } 473e05df3b1SJaegeuk Kim } 474e05df3b1SJaegeuk Kim dn->nid = nids[level]; 475e05df3b1SJaegeuk Kim dn->ofs_in_node = offset[level]; 476e05df3b1SJaegeuk Kim dn->node_page = npage[level]; 477e05df3b1SJaegeuk Kim dn->data_blkaddr = datablock_addr(dn->node_page, dn->ofs_in_node); 478e05df3b1SJaegeuk Kim return 0; 479e05df3b1SJaegeuk Kim 480e05df3b1SJaegeuk Kim release_pages: 481e05df3b1SJaegeuk Kim f2fs_put_page(parent, 1); 482e05df3b1SJaegeuk Kim if (i > 1) 483e05df3b1SJaegeuk Kim f2fs_put_page(npage[0], 0); 484e05df3b1SJaegeuk Kim release_out: 485e05df3b1SJaegeuk Kim dn->inode_page = NULL; 486e05df3b1SJaegeuk Kim dn->node_page = NULL; 487e05df3b1SJaegeuk Kim return err; 488e05df3b1SJaegeuk Kim } 489e05df3b1SJaegeuk Kim 490e05df3b1SJaegeuk Kim static void truncate_node(struct dnode_of_data *dn) 491e05df3b1SJaegeuk Kim { 492e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); 493e05df3b1SJaegeuk Kim struct node_info ni; 494e05df3b1SJaegeuk Kim 495e05df3b1SJaegeuk Kim get_node_info(sbi, dn->nid, &ni); 49671e9fec5SJaegeuk Kim if (dn->inode->i_blocks == 0) { 4975d56b671SJaegeuk Kim f2fs_bug_on(ni.blk_addr != NULL_ADDR); 49871e9fec5SJaegeuk Kim goto invalidate; 49971e9fec5SJaegeuk Kim } 5005d56b671SJaegeuk Kim f2fs_bug_on(ni.blk_addr == NULL_ADDR); 501e05df3b1SJaegeuk Kim 502e05df3b1SJaegeuk Kim /* Deallocate node address */ 50371e9fec5SJaegeuk Kim invalidate_blocks(sbi, ni.blk_addr); 504ef86d709SGu Zheng dec_valid_node_count(sbi, dn->inode); 505479f40c4SJaegeuk Kim set_node_addr(sbi, &ni, NULL_ADDR, false); 506e05df3b1SJaegeuk Kim 507e05df3b1SJaegeuk Kim if (dn->nid == dn->inode->i_ino) { 508e05df3b1SJaegeuk Kim remove_orphan_inode(sbi, dn->nid); 509e05df3b1SJaegeuk Kim dec_valid_inode_count(sbi); 510e05df3b1SJaegeuk Kim } else { 511e05df3b1SJaegeuk Kim sync_inode_page(dn); 512e05df3b1SJaegeuk Kim } 51371e9fec5SJaegeuk Kim invalidate: 514e05df3b1SJaegeuk Kim clear_node_page_dirty(dn->node_page); 515e05df3b1SJaegeuk Kim F2FS_SET_SB_DIRT(sbi); 516e05df3b1SJaegeuk Kim 517e05df3b1SJaegeuk Kim f2fs_put_page(dn->node_page, 1); 518bf39c00aSJaegeuk Kim 519bf39c00aSJaegeuk Kim invalidate_mapping_pages(NODE_MAPPING(sbi), 520bf39c00aSJaegeuk Kim dn->node_page->index, dn->node_page->index); 521bf39c00aSJaegeuk Kim 522e05df3b1SJaegeuk Kim dn->node_page = NULL; 52351dd6249SNamjae Jeon trace_f2fs_truncate_node(dn->inode, dn->nid, ni.blk_addr); 524e05df3b1SJaegeuk Kim } 525e05df3b1SJaegeuk Kim 526e05df3b1SJaegeuk Kim static int truncate_dnode(struct dnode_of_data *dn) 527e05df3b1SJaegeuk Kim { 528e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); 529e05df3b1SJaegeuk Kim struct page *page; 530e05df3b1SJaegeuk Kim 531e05df3b1SJaegeuk Kim if (dn->nid == 0) 532e05df3b1SJaegeuk Kim return 1; 533e05df3b1SJaegeuk Kim 534e05df3b1SJaegeuk Kim /* get direct node */ 535e05df3b1SJaegeuk Kim page = get_node_page(sbi, dn->nid); 536e05df3b1SJaegeuk Kim if (IS_ERR(page) && PTR_ERR(page) == -ENOENT) 537e05df3b1SJaegeuk Kim return 1; 538e05df3b1SJaegeuk Kim else if (IS_ERR(page)) 539e05df3b1SJaegeuk Kim return PTR_ERR(page); 540e05df3b1SJaegeuk Kim 541e05df3b1SJaegeuk Kim /* Make dnode_of_data for parameter */ 542e05df3b1SJaegeuk Kim dn->node_page = page; 543e05df3b1SJaegeuk Kim dn->ofs_in_node = 0; 544e05df3b1SJaegeuk Kim truncate_data_blocks(dn); 545e05df3b1SJaegeuk Kim truncate_node(dn); 546e05df3b1SJaegeuk Kim return 1; 547e05df3b1SJaegeuk Kim } 548e05df3b1SJaegeuk Kim 549e05df3b1SJaegeuk Kim static int truncate_nodes(struct dnode_of_data *dn, unsigned int nofs, 550e05df3b1SJaegeuk Kim int ofs, int depth) 551e05df3b1SJaegeuk Kim { 552e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); 553e05df3b1SJaegeuk Kim struct dnode_of_data rdn = *dn; 554e05df3b1SJaegeuk Kim struct page *page; 555e05df3b1SJaegeuk Kim struct f2fs_node *rn; 556e05df3b1SJaegeuk Kim nid_t child_nid; 557e05df3b1SJaegeuk Kim unsigned int child_nofs; 558e05df3b1SJaegeuk Kim int freed = 0; 559e05df3b1SJaegeuk Kim int i, ret; 560e05df3b1SJaegeuk Kim 561e05df3b1SJaegeuk Kim if (dn->nid == 0) 562e05df3b1SJaegeuk Kim return NIDS_PER_BLOCK + 1; 563e05df3b1SJaegeuk Kim 56451dd6249SNamjae Jeon trace_f2fs_truncate_nodes_enter(dn->inode, dn->nid, dn->data_blkaddr); 56551dd6249SNamjae Jeon 566e05df3b1SJaegeuk Kim page = get_node_page(sbi, dn->nid); 56751dd6249SNamjae Jeon if (IS_ERR(page)) { 56851dd6249SNamjae Jeon trace_f2fs_truncate_nodes_exit(dn->inode, PTR_ERR(page)); 569e05df3b1SJaegeuk Kim return PTR_ERR(page); 57051dd6249SNamjae Jeon } 571e05df3b1SJaegeuk Kim 57245590710SGu Zheng rn = F2FS_NODE(page); 573e05df3b1SJaegeuk Kim if (depth < 3) { 574e05df3b1SJaegeuk Kim for (i = ofs; i < NIDS_PER_BLOCK; i++, freed++) { 575e05df3b1SJaegeuk Kim child_nid = le32_to_cpu(rn->in.nid[i]); 576e05df3b1SJaegeuk Kim if (child_nid == 0) 577e05df3b1SJaegeuk Kim continue; 578e05df3b1SJaegeuk Kim rdn.nid = child_nid; 579e05df3b1SJaegeuk Kim ret = truncate_dnode(&rdn); 580e05df3b1SJaegeuk Kim if (ret < 0) 581e05df3b1SJaegeuk Kim goto out_err; 582e05df3b1SJaegeuk Kim set_nid(page, i, 0, false); 583e05df3b1SJaegeuk Kim } 584e05df3b1SJaegeuk Kim } else { 585e05df3b1SJaegeuk Kim child_nofs = nofs + ofs * (NIDS_PER_BLOCK + 1) + 1; 586e05df3b1SJaegeuk Kim for (i = ofs; i < NIDS_PER_BLOCK; i++) { 587e05df3b1SJaegeuk Kim child_nid = le32_to_cpu(rn->in.nid[i]); 588e05df3b1SJaegeuk Kim if (child_nid == 0) { 589e05df3b1SJaegeuk Kim child_nofs += NIDS_PER_BLOCK + 1; 590e05df3b1SJaegeuk Kim continue; 591e05df3b1SJaegeuk Kim } 592e05df3b1SJaegeuk Kim rdn.nid = child_nid; 593e05df3b1SJaegeuk Kim ret = truncate_nodes(&rdn, child_nofs, 0, depth - 1); 594e05df3b1SJaegeuk Kim if (ret == (NIDS_PER_BLOCK + 1)) { 595e05df3b1SJaegeuk Kim set_nid(page, i, 0, false); 596e05df3b1SJaegeuk Kim child_nofs += ret; 597e05df3b1SJaegeuk Kim } else if (ret < 0 && ret != -ENOENT) { 598e05df3b1SJaegeuk Kim goto out_err; 599e05df3b1SJaegeuk Kim } 600e05df3b1SJaegeuk Kim } 601e05df3b1SJaegeuk Kim freed = child_nofs; 602e05df3b1SJaegeuk Kim } 603e05df3b1SJaegeuk Kim 604e05df3b1SJaegeuk Kim if (!ofs) { 605e05df3b1SJaegeuk Kim /* remove current indirect node */ 606e05df3b1SJaegeuk Kim dn->node_page = page; 607e05df3b1SJaegeuk Kim truncate_node(dn); 608e05df3b1SJaegeuk Kim freed++; 609e05df3b1SJaegeuk Kim } else { 610e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 611e05df3b1SJaegeuk Kim } 61251dd6249SNamjae Jeon trace_f2fs_truncate_nodes_exit(dn->inode, freed); 613e05df3b1SJaegeuk Kim return freed; 614e05df3b1SJaegeuk Kim 615e05df3b1SJaegeuk Kim out_err: 616e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 61751dd6249SNamjae Jeon trace_f2fs_truncate_nodes_exit(dn->inode, ret); 618e05df3b1SJaegeuk Kim return ret; 619e05df3b1SJaegeuk Kim } 620e05df3b1SJaegeuk Kim 621e05df3b1SJaegeuk Kim static int truncate_partial_nodes(struct dnode_of_data *dn, 622e05df3b1SJaegeuk Kim struct f2fs_inode *ri, int *offset, int depth) 623e05df3b1SJaegeuk Kim { 624e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); 625e05df3b1SJaegeuk Kim struct page *pages[2]; 626e05df3b1SJaegeuk Kim nid_t nid[3]; 627e05df3b1SJaegeuk Kim nid_t child_nid; 628e05df3b1SJaegeuk Kim int err = 0; 629e05df3b1SJaegeuk Kim int i; 630e05df3b1SJaegeuk Kim int idx = depth - 2; 631e05df3b1SJaegeuk Kim 632e05df3b1SJaegeuk Kim nid[0] = le32_to_cpu(ri->i_nid[offset[0] - NODE_DIR1_BLOCK]); 633e05df3b1SJaegeuk Kim if (!nid[0]) 634e05df3b1SJaegeuk Kim return 0; 635e05df3b1SJaegeuk Kim 636e05df3b1SJaegeuk Kim /* get indirect nodes in the path */ 637a225dca3Sshifei10.ge for (i = 0; i < idx + 1; i++) { 638e05df3b1SJaegeuk Kim /* refernece count'll be increased */ 639e05df3b1SJaegeuk Kim pages[i] = get_node_page(sbi, nid[i]); 640e05df3b1SJaegeuk Kim if (IS_ERR(pages[i])) { 641e05df3b1SJaegeuk Kim err = PTR_ERR(pages[i]); 642a225dca3Sshifei10.ge idx = i - 1; 643e05df3b1SJaegeuk Kim goto fail; 644e05df3b1SJaegeuk Kim } 645e05df3b1SJaegeuk Kim nid[i + 1] = get_nid(pages[i], offset[i + 1], false); 646e05df3b1SJaegeuk Kim } 647e05df3b1SJaegeuk Kim 648e05df3b1SJaegeuk Kim /* free direct nodes linked to a partial indirect node */ 649a225dca3Sshifei10.ge for (i = offset[idx + 1]; i < NIDS_PER_BLOCK; i++) { 650e05df3b1SJaegeuk Kim child_nid = get_nid(pages[idx], i, false); 651e05df3b1SJaegeuk Kim if (!child_nid) 652e05df3b1SJaegeuk Kim continue; 653e05df3b1SJaegeuk Kim dn->nid = child_nid; 654e05df3b1SJaegeuk Kim err = truncate_dnode(dn); 655e05df3b1SJaegeuk Kim if (err < 0) 656e05df3b1SJaegeuk Kim goto fail; 657e05df3b1SJaegeuk Kim set_nid(pages[idx], i, 0, false); 658e05df3b1SJaegeuk Kim } 659e05df3b1SJaegeuk Kim 660a225dca3Sshifei10.ge if (offset[idx + 1] == 0) { 661e05df3b1SJaegeuk Kim dn->node_page = pages[idx]; 662e05df3b1SJaegeuk Kim dn->nid = nid[idx]; 663e05df3b1SJaegeuk Kim truncate_node(dn); 664e05df3b1SJaegeuk Kim } else { 665e05df3b1SJaegeuk Kim f2fs_put_page(pages[idx], 1); 666e05df3b1SJaegeuk Kim } 667e05df3b1SJaegeuk Kim offset[idx]++; 668a225dca3Sshifei10.ge offset[idx + 1] = 0; 669a225dca3Sshifei10.ge idx--; 670e05df3b1SJaegeuk Kim fail: 671a225dca3Sshifei10.ge for (i = idx; i >= 0; i--) 672e05df3b1SJaegeuk Kim f2fs_put_page(pages[i], 1); 67351dd6249SNamjae Jeon 67451dd6249SNamjae Jeon trace_f2fs_truncate_partial_nodes(dn->inode, nid, depth, err); 67551dd6249SNamjae Jeon 676e05df3b1SJaegeuk Kim return err; 677e05df3b1SJaegeuk Kim } 678e05df3b1SJaegeuk Kim 6790a8165d7SJaegeuk Kim /* 680e05df3b1SJaegeuk Kim * All the block addresses of data and nodes should be nullified. 681e05df3b1SJaegeuk Kim */ 682e05df3b1SJaegeuk Kim int truncate_inode_blocks(struct inode *inode, pgoff_t from) 683e05df3b1SJaegeuk Kim { 684e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); 685e05df3b1SJaegeuk Kim int err = 0, cont = 1; 686e05df3b1SJaegeuk Kim int level, offset[4], noffset[4]; 6877dd690c8SJaegeuk Kim unsigned int nofs = 0; 68858bfaf44SJaegeuk Kim struct f2fs_inode *ri; 689e05df3b1SJaegeuk Kim struct dnode_of_data dn; 690e05df3b1SJaegeuk Kim struct page *page; 691e05df3b1SJaegeuk Kim 69251dd6249SNamjae Jeon trace_f2fs_truncate_inode_blocks_enter(inode, from); 69351dd6249SNamjae Jeon 694de93653fSJaegeuk Kim level = get_node_path(F2FS_I(inode), from, offset, noffset); 695afcb7ca0SJaegeuk Kim restart: 696e05df3b1SJaegeuk Kim page = get_node_page(sbi, inode->i_ino); 69751dd6249SNamjae Jeon if (IS_ERR(page)) { 69851dd6249SNamjae Jeon trace_f2fs_truncate_inode_blocks_exit(inode, PTR_ERR(page)); 699e05df3b1SJaegeuk Kim return PTR_ERR(page); 70051dd6249SNamjae Jeon } 701e05df3b1SJaegeuk Kim 702e05df3b1SJaegeuk Kim set_new_dnode(&dn, inode, page, NULL, 0); 703e05df3b1SJaegeuk Kim unlock_page(page); 704e05df3b1SJaegeuk Kim 70558bfaf44SJaegeuk Kim ri = F2FS_INODE(page); 706e05df3b1SJaegeuk Kim switch (level) { 707e05df3b1SJaegeuk Kim case 0: 708e05df3b1SJaegeuk Kim case 1: 709e05df3b1SJaegeuk Kim nofs = noffset[1]; 710e05df3b1SJaegeuk Kim break; 711e05df3b1SJaegeuk Kim case 2: 712e05df3b1SJaegeuk Kim nofs = noffset[1]; 713e05df3b1SJaegeuk Kim if (!offset[level - 1]) 714e05df3b1SJaegeuk Kim goto skip_partial; 71558bfaf44SJaegeuk Kim err = truncate_partial_nodes(&dn, ri, offset, level); 716e05df3b1SJaegeuk Kim if (err < 0 && err != -ENOENT) 717e05df3b1SJaegeuk Kim goto fail; 718e05df3b1SJaegeuk Kim nofs += 1 + NIDS_PER_BLOCK; 719e05df3b1SJaegeuk Kim break; 720e05df3b1SJaegeuk Kim case 3: 721e05df3b1SJaegeuk Kim nofs = 5 + 2 * NIDS_PER_BLOCK; 722e05df3b1SJaegeuk Kim if (!offset[level - 1]) 723e05df3b1SJaegeuk Kim goto skip_partial; 72458bfaf44SJaegeuk Kim err = truncate_partial_nodes(&dn, ri, offset, level); 725e05df3b1SJaegeuk Kim if (err < 0 && err != -ENOENT) 726e05df3b1SJaegeuk Kim goto fail; 727e05df3b1SJaegeuk Kim break; 728e05df3b1SJaegeuk Kim default: 729e05df3b1SJaegeuk Kim BUG(); 730e05df3b1SJaegeuk Kim } 731e05df3b1SJaegeuk Kim 732e05df3b1SJaegeuk Kim skip_partial: 733e05df3b1SJaegeuk Kim while (cont) { 73458bfaf44SJaegeuk Kim dn.nid = le32_to_cpu(ri->i_nid[offset[0] - NODE_DIR1_BLOCK]); 735e05df3b1SJaegeuk Kim switch (offset[0]) { 736e05df3b1SJaegeuk Kim case NODE_DIR1_BLOCK: 737e05df3b1SJaegeuk Kim case NODE_DIR2_BLOCK: 738e05df3b1SJaegeuk Kim err = truncate_dnode(&dn); 739e05df3b1SJaegeuk Kim break; 740e05df3b1SJaegeuk Kim 741e05df3b1SJaegeuk Kim case NODE_IND1_BLOCK: 742e05df3b1SJaegeuk Kim case NODE_IND2_BLOCK: 743e05df3b1SJaegeuk Kim err = truncate_nodes(&dn, nofs, offset[1], 2); 744e05df3b1SJaegeuk Kim break; 745e05df3b1SJaegeuk Kim 746e05df3b1SJaegeuk Kim case NODE_DIND_BLOCK: 747e05df3b1SJaegeuk Kim err = truncate_nodes(&dn, nofs, offset[1], 3); 748e05df3b1SJaegeuk Kim cont = 0; 749e05df3b1SJaegeuk Kim break; 750e05df3b1SJaegeuk Kim 751e05df3b1SJaegeuk Kim default: 752e05df3b1SJaegeuk Kim BUG(); 753e05df3b1SJaegeuk Kim } 754e05df3b1SJaegeuk Kim if (err < 0 && err != -ENOENT) 755e05df3b1SJaegeuk Kim goto fail; 756e05df3b1SJaegeuk Kim if (offset[1] == 0 && 75758bfaf44SJaegeuk Kim ri->i_nid[offset[0] - NODE_DIR1_BLOCK]) { 758e05df3b1SJaegeuk Kim lock_page(page); 7594ef51a8fSJaegeuk Kim if (unlikely(page->mapping != NODE_MAPPING(sbi))) { 760afcb7ca0SJaegeuk Kim f2fs_put_page(page, 1); 761afcb7ca0SJaegeuk Kim goto restart; 762afcb7ca0SJaegeuk Kim } 7633cb5ad15SJaegeuk Kim f2fs_wait_on_page_writeback(page, NODE); 76458bfaf44SJaegeuk Kim ri->i_nid[offset[0] - NODE_DIR1_BLOCK] = 0; 765e05df3b1SJaegeuk Kim set_page_dirty(page); 766e05df3b1SJaegeuk Kim unlock_page(page); 767e05df3b1SJaegeuk Kim } 768e05df3b1SJaegeuk Kim offset[1] = 0; 769e05df3b1SJaegeuk Kim offset[0]++; 770e05df3b1SJaegeuk Kim nofs += err; 771e05df3b1SJaegeuk Kim } 772e05df3b1SJaegeuk Kim fail: 773e05df3b1SJaegeuk Kim f2fs_put_page(page, 0); 77451dd6249SNamjae Jeon trace_f2fs_truncate_inode_blocks_exit(inode, err); 775e05df3b1SJaegeuk Kim return err > 0 ? 0 : err; 776e05df3b1SJaegeuk Kim } 777e05df3b1SJaegeuk Kim 7784f16fb0fSJaegeuk Kim int truncate_xattr_node(struct inode *inode, struct page *page) 7794f16fb0fSJaegeuk Kim { 7804f16fb0fSJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); 7814f16fb0fSJaegeuk Kim nid_t nid = F2FS_I(inode)->i_xattr_nid; 7824f16fb0fSJaegeuk Kim struct dnode_of_data dn; 7834f16fb0fSJaegeuk Kim struct page *npage; 7844f16fb0fSJaegeuk Kim 7854f16fb0fSJaegeuk Kim if (!nid) 7864f16fb0fSJaegeuk Kim return 0; 7874f16fb0fSJaegeuk Kim 7884f16fb0fSJaegeuk Kim npage = get_node_page(sbi, nid); 7894f16fb0fSJaegeuk Kim if (IS_ERR(npage)) 7904f16fb0fSJaegeuk Kim return PTR_ERR(npage); 7914f16fb0fSJaegeuk Kim 7924f16fb0fSJaegeuk Kim F2FS_I(inode)->i_xattr_nid = 0; 79365985d93SJaegeuk Kim 79465985d93SJaegeuk Kim /* need to do checkpoint during fsync */ 79565985d93SJaegeuk Kim F2FS_I(inode)->xattr_ver = cur_cp_version(F2FS_CKPT(sbi)); 79665985d93SJaegeuk Kim 7974f16fb0fSJaegeuk Kim set_new_dnode(&dn, inode, page, npage, nid); 7984f16fb0fSJaegeuk Kim 7994f16fb0fSJaegeuk Kim if (page) 80001d2d1aaSChao Yu dn.inode_page_locked = true; 8014f16fb0fSJaegeuk Kim truncate_node(&dn); 8024f16fb0fSJaegeuk Kim return 0; 8034f16fb0fSJaegeuk Kim } 8044f16fb0fSJaegeuk Kim 80539936837SJaegeuk Kim /* 8064f4124d0SChao Yu * Caller should grab and release a rwsem by calling f2fs_lock_op() and 8074f4124d0SChao Yu * f2fs_unlock_op(). 80839936837SJaegeuk Kim */ 80958e674d6SGu Zheng void remove_inode_page(struct inode *inode) 810e05df3b1SJaegeuk Kim { 811e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); 812e05df3b1SJaegeuk Kim struct page *page; 813e05df3b1SJaegeuk Kim nid_t ino = inode->i_ino; 814e05df3b1SJaegeuk Kim struct dnode_of_data dn; 815e05df3b1SJaegeuk Kim 816e05df3b1SJaegeuk Kim page = get_node_page(sbi, ino); 81739936837SJaegeuk Kim if (IS_ERR(page)) 81858e674d6SGu Zheng return; 819e05df3b1SJaegeuk Kim 82058e674d6SGu Zheng if (truncate_xattr_node(inode, page)) { 8214f16fb0fSJaegeuk Kim f2fs_put_page(page, 1); 82258e674d6SGu Zheng return; 823e05df3b1SJaegeuk Kim } 82471e9fec5SJaegeuk Kim /* 0 is possible, after f2fs_new_inode() is failed */ 8255d56b671SJaegeuk Kim f2fs_bug_on(inode->i_blocks != 0 && inode->i_blocks != 1); 826e05df3b1SJaegeuk Kim set_new_dnode(&dn, inode, page, page, ino); 827e05df3b1SJaegeuk Kim truncate_node(&dn); 828e05df3b1SJaegeuk Kim } 829e05df3b1SJaegeuk Kim 83044a83ff6SJaegeuk Kim struct page *new_inode_page(struct inode *inode, const struct qstr *name) 831e05df3b1SJaegeuk Kim { 832e05df3b1SJaegeuk Kim struct dnode_of_data dn; 833e05df3b1SJaegeuk Kim 834e05df3b1SJaegeuk Kim /* allocate inode page for new inode */ 835e05df3b1SJaegeuk Kim set_new_dnode(&dn, inode, NULL, NULL, inode->i_ino); 83644a83ff6SJaegeuk Kim 83744a83ff6SJaegeuk Kim /* caller should f2fs_put_page(page, 1); */ 8388ae8f162SJaegeuk Kim return new_node_page(&dn, 0, NULL); 839e05df3b1SJaegeuk Kim } 840e05df3b1SJaegeuk Kim 8418ae8f162SJaegeuk Kim struct page *new_node_page(struct dnode_of_data *dn, 8428ae8f162SJaegeuk Kim unsigned int ofs, struct page *ipage) 843e05df3b1SJaegeuk Kim { 844e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); 845e05df3b1SJaegeuk Kim struct node_info old_ni, new_ni; 846e05df3b1SJaegeuk Kim struct page *page; 847e05df3b1SJaegeuk Kim int err; 848e05df3b1SJaegeuk Kim 8496bacf52fSJaegeuk Kim if (unlikely(is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC))) 850e05df3b1SJaegeuk Kim return ERR_PTR(-EPERM); 851e05df3b1SJaegeuk Kim 8523cb5ad15SJaegeuk Kim page = grab_cache_page_write_begin(NODE_MAPPING(sbi), 8533cb5ad15SJaegeuk Kim dn->nid, AOP_FLAG_NOFS); 854e05df3b1SJaegeuk Kim if (!page) 855e05df3b1SJaegeuk Kim return ERR_PTR(-ENOMEM); 856e05df3b1SJaegeuk Kim 8576bacf52fSJaegeuk Kim if (unlikely(!inc_valid_node_count(sbi, dn->inode))) { 8589c02740cSJaegeuk Kim err = -ENOSPC; 8599c02740cSJaegeuk Kim goto fail; 8609c02740cSJaegeuk Kim } 861e05df3b1SJaegeuk Kim 8629c02740cSJaegeuk Kim get_node_info(sbi, dn->nid, &old_ni); 863e05df3b1SJaegeuk Kim 864e05df3b1SJaegeuk Kim /* Reinitialize old_ni with new node page */ 8655d56b671SJaegeuk Kim f2fs_bug_on(old_ni.blk_addr != NULL_ADDR); 866e05df3b1SJaegeuk Kim new_ni = old_ni; 867e05df3b1SJaegeuk Kim new_ni.ino = dn->inode->i_ino; 868479f40c4SJaegeuk Kim set_node_addr(sbi, &new_ni, NEW_ADDR, false); 8699c02740cSJaegeuk Kim 8709c02740cSJaegeuk Kim fill_node_footer(page, dn->nid, dn->inode->i_ino, ofs, true); 871398b1ac5SJaegeuk Kim set_cold_node(dn->inode, page); 8729c02740cSJaegeuk Kim SetPageUptodate(page); 8739c02740cSJaegeuk Kim set_page_dirty(page); 874e05df3b1SJaegeuk Kim 8754bc8e9bcSChao Yu if (f2fs_has_xattr_block(ofs)) 876479bd73aSJaegeuk Kim F2FS_I(dn->inode)->i_xattr_nid = dn->nid; 877479bd73aSJaegeuk Kim 878e05df3b1SJaegeuk Kim dn->node_page = page; 8798ae8f162SJaegeuk Kim if (ipage) 8808ae8f162SJaegeuk Kim update_inode(dn->inode, ipage); 8818ae8f162SJaegeuk Kim else 882e05df3b1SJaegeuk Kim sync_inode_page(dn); 883e05df3b1SJaegeuk Kim if (ofs == 0) 884e05df3b1SJaegeuk Kim inc_valid_inode_count(sbi); 885e05df3b1SJaegeuk Kim 886e05df3b1SJaegeuk Kim return page; 887e05df3b1SJaegeuk Kim 888e05df3b1SJaegeuk Kim fail: 88971e9fec5SJaegeuk Kim clear_node_page_dirty(page); 890e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 891e05df3b1SJaegeuk Kim return ERR_PTR(err); 892e05df3b1SJaegeuk Kim } 893e05df3b1SJaegeuk Kim 89456ae674cSJaegeuk Kim /* 89556ae674cSJaegeuk Kim * Caller should do after getting the following values. 89656ae674cSJaegeuk Kim * 0: f2fs_put_page(page, 0) 89756ae674cSJaegeuk Kim * LOCKED_PAGE: f2fs_put_page(page, 1) 89856ae674cSJaegeuk Kim * error: nothing 89956ae674cSJaegeuk Kim */ 90093dfe2acSJaegeuk Kim static int read_node_page(struct page *page, int rw) 901e05df3b1SJaegeuk Kim { 902e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(page->mapping->host->i_sb); 903e05df3b1SJaegeuk Kim struct node_info ni; 904e05df3b1SJaegeuk Kim 905e05df3b1SJaegeuk Kim get_node_info(sbi, page->index, &ni); 906e05df3b1SJaegeuk Kim 9076bacf52fSJaegeuk Kim if (unlikely(ni.blk_addr == NULL_ADDR)) { 908393ff91fSJaegeuk Kim f2fs_put_page(page, 1); 909e05df3b1SJaegeuk Kim return -ENOENT; 910393ff91fSJaegeuk Kim } 911393ff91fSJaegeuk Kim 91256ae674cSJaegeuk Kim if (PageUptodate(page)) 91356ae674cSJaegeuk Kim return LOCKED_PAGE; 914393ff91fSJaegeuk Kim 91593dfe2acSJaegeuk Kim return f2fs_submit_page_bio(sbi, page, ni.blk_addr, rw); 916e05df3b1SJaegeuk Kim } 917e05df3b1SJaegeuk Kim 9180a8165d7SJaegeuk Kim /* 919e05df3b1SJaegeuk Kim * Readahead a node page 920e05df3b1SJaegeuk Kim */ 921e05df3b1SJaegeuk Kim void ra_node_page(struct f2fs_sb_info *sbi, nid_t nid) 922e05df3b1SJaegeuk Kim { 923e05df3b1SJaegeuk Kim struct page *apage; 92456ae674cSJaegeuk Kim int err; 925e05df3b1SJaegeuk Kim 9264ef51a8fSJaegeuk Kim apage = find_get_page(NODE_MAPPING(sbi), nid); 927393ff91fSJaegeuk Kim if (apage && PageUptodate(apage)) { 928393ff91fSJaegeuk Kim f2fs_put_page(apage, 0); 929393ff91fSJaegeuk Kim return; 930393ff91fSJaegeuk Kim } 931e05df3b1SJaegeuk Kim f2fs_put_page(apage, 0); 932e05df3b1SJaegeuk Kim 9334ef51a8fSJaegeuk Kim apage = grab_cache_page(NODE_MAPPING(sbi), nid); 934e05df3b1SJaegeuk Kim if (!apage) 935e05df3b1SJaegeuk Kim return; 936e05df3b1SJaegeuk Kim 93756ae674cSJaegeuk Kim err = read_node_page(apage, READA); 93856ae674cSJaegeuk Kim if (err == 0) 939369a708cSJaegeuk Kim f2fs_put_page(apage, 0); 94056ae674cSJaegeuk Kim else if (err == LOCKED_PAGE) 94156ae674cSJaegeuk Kim f2fs_put_page(apage, 1); 942e05df3b1SJaegeuk Kim } 943e05df3b1SJaegeuk Kim 944e05df3b1SJaegeuk Kim struct page *get_node_page(struct f2fs_sb_info *sbi, pgoff_t nid) 945e05df3b1SJaegeuk Kim { 94656ae674cSJaegeuk Kim struct page *page; 94756ae674cSJaegeuk Kim int err; 948afcb7ca0SJaegeuk Kim repeat: 9493cb5ad15SJaegeuk Kim page = grab_cache_page_write_begin(NODE_MAPPING(sbi), 9503cb5ad15SJaegeuk Kim nid, AOP_FLAG_NOFS); 951e05df3b1SJaegeuk Kim if (!page) 952e05df3b1SJaegeuk Kim return ERR_PTR(-ENOMEM); 953e05df3b1SJaegeuk Kim 954e05df3b1SJaegeuk Kim err = read_node_page(page, READ_SYNC); 95556ae674cSJaegeuk Kim if (err < 0) 956e05df3b1SJaegeuk Kim return ERR_PTR(err); 95756ae674cSJaegeuk Kim else if (err == LOCKED_PAGE) 95856ae674cSJaegeuk Kim goto got_it; 959e05df3b1SJaegeuk Kim 960393ff91fSJaegeuk Kim lock_page(page); 9613bb5e2c8SJaegeuk Kim if (unlikely(!PageUptodate(page) || nid != nid_of_node(page))) { 962393ff91fSJaegeuk Kim f2fs_put_page(page, 1); 963393ff91fSJaegeuk Kim return ERR_PTR(-EIO); 964393ff91fSJaegeuk Kim } 9654ef51a8fSJaegeuk Kim if (unlikely(page->mapping != NODE_MAPPING(sbi))) { 966afcb7ca0SJaegeuk Kim f2fs_put_page(page, 1); 967afcb7ca0SJaegeuk Kim goto repeat; 968afcb7ca0SJaegeuk Kim } 96956ae674cSJaegeuk Kim got_it: 970e05df3b1SJaegeuk Kim mark_page_accessed(page); 971e05df3b1SJaegeuk Kim return page; 972e05df3b1SJaegeuk Kim } 973e05df3b1SJaegeuk Kim 9740a8165d7SJaegeuk Kim /* 975e05df3b1SJaegeuk Kim * Return a locked page for the desired node page. 976e05df3b1SJaegeuk Kim * And, readahead MAX_RA_NODE number of node pages. 977e05df3b1SJaegeuk Kim */ 978e05df3b1SJaegeuk Kim struct page *get_node_page_ra(struct page *parent, int start) 979e05df3b1SJaegeuk Kim { 980e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(parent->mapping->host->i_sb); 981c718379bSJaegeuk Kim struct blk_plug plug; 982e05df3b1SJaegeuk Kim struct page *page; 98356ae674cSJaegeuk Kim int err, i, end; 98456ae674cSJaegeuk Kim nid_t nid; 985e05df3b1SJaegeuk Kim 986e05df3b1SJaegeuk Kim /* First, try getting the desired direct node. */ 987e05df3b1SJaegeuk Kim nid = get_nid(parent, start, false); 988e05df3b1SJaegeuk Kim if (!nid) 989e05df3b1SJaegeuk Kim return ERR_PTR(-ENOENT); 990afcb7ca0SJaegeuk Kim repeat: 9914ef51a8fSJaegeuk Kim page = grab_cache_page(NODE_MAPPING(sbi), nid); 992e05df3b1SJaegeuk Kim if (!page) 993e05df3b1SJaegeuk Kim return ERR_PTR(-ENOMEM); 994e05df3b1SJaegeuk Kim 99566d36a29SJaegeuk Kim err = read_node_page(page, READ_SYNC); 99656ae674cSJaegeuk Kim if (err < 0) 997e05df3b1SJaegeuk Kim return ERR_PTR(err); 99856ae674cSJaegeuk Kim else if (err == LOCKED_PAGE) 99956ae674cSJaegeuk Kim goto page_hit; 1000e05df3b1SJaegeuk Kim 1001c718379bSJaegeuk Kim blk_start_plug(&plug); 1002c718379bSJaegeuk Kim 1003e05df3b1SJaegeuk Kim /* Then, try readahead for siblings of the desired node */ 1004e05df3b1SJaegeuk Kim end = start + MAX_RA_NODE; 1005e05df3b1SJaegeuk Kim end = min(end, NIDS_PER_BLOCK); 1006e05df3b1SJaegeuk Kim for (i = start + 1; i < end; i++) { 1007e05df3b1SJaegeuk Kim nid = get_nid(parent, i, false); 1008e05df3b1SJaegeuk Kim if (!nid) 1009e05df3b1SJaegeuk Kim continue; 1010e05df3b1SJaegeuk Kim ra_node_page(sbi, nid); 1011e05df3b1SJaegeuk Kim } 1012e05df3b1SJaegeuk Kim 1013c718379bSJaegeuk Kim blk_finish_plug(&plug); 1014c718379bSJaegeuk Kim 1015e05df3b1SJaegeuk Kim lock_page(page); 10164ef51a8fSJaegeuk Kim if (unlikely(page->mapping != NODE_MAPPING(sbi))) { 1017afcb7ca0SJaegeuk Kim f2fs_put_page(page, 1); 1018afcb7ca0SJaegeuk Kim goto repeat; 1019afcb7ca0SJaegeuk Kim } 1020e0f56cb4SNamjae Jeon page_hit: 10216bacf52fSJaegeuk Kim if (unlikely(!PageUptodate(page))) { 1022e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 1023e05df3b1SJaegeuk Kim return ERR_PTR(-EIO); 1024e05df3b1SJaegeuk Kim } 1025393ff91fSJaegeuk Kim mark_page_accessed(page); 1026e05df3b1SJaegeuk Kim return page; 1027e05df3b1SJaegeuk Kim } 1028e05df3b1SJaegeuk Kim 1029e05df3b1SJaegeuk Kim void sync_inode_page(struct dnode_of_data *dn) 1030e05df3b1SJaegeuk Kim { 1031e05df3b1SJaegeuk Kim if (IS_INODE(dn->node_page) || dn->inode_page == dn->node_page) { 1032e05df3b1SJaegeuk Kim update_inode(dn->inode, dn->node_page); 1033e05df3b1SJaegeuk Kim } else if (dn->inode_page) { 1034e05df3b1SJaegeuk Kim if (!dn->inode_page_locked) 1035e05df3b1SJaegeuk Kim lock_page(dn->inode_page); 1036e05df3b1SJaegeuk Kim update_inode(dn->inode, dn->inode_page); 1037e05df3b1SJaegeuk Kim if (!dn->inode_page_locked) 1038e05df3b1SJaegeuk Kim unlock_page(dn->inode_page); 1039e05df3b1SJaegeuk Kim } else { 104039936837SJaegeuk Kim update_inode_page(dn->inode); 1041e05df3b1SJaegeuk Kim } 1042e05df3b1SJaegeuk Kim } 1043e05df3b1SJaegeuk Kim 1044e05df3b1SJaegeuk Kim int sync_node_pages(struct f2fs_sb_info *sbi, nid_t ino, 1045e05df3b1SJaegeuk Kim struct writeback_control *wbc) 1046e05df3b1SJaegeuk Kim { 1047e05df3b1SJaegeuk Kim pgoff_t index, end; 1048e05df3b1SJaegeuk Kim struct pagevec pvec; 1049e05df3b1SJaegeuk Kim int step = ino ? 2 : 0; 1050e05df3b1SJaegeuk Kim int nwritten = 0, wrote = 0; 1051e05df3b1SJaegeuk Kim 1052e05df3b1SJaegeuk Kim pagevec_init(&pvec, 0); 1053e05df3b1SJaegeuk Kim 1054e05df3b1SJaegeuk Kim next_step: 1055e05df3b1SJaegeuk Kim index = 0; 1056e05df3b1SJaegeuk Kim end = LONG_MAX; 1057e05df3b1SJaegeuk Kim 1058e05df3b1SJaegeuk Kim while (index <= end) { 1059e05df3b1SJaegeuk Kim int i, nr_pages; 10604ef51a8fSJaegeuk Kim nr_pages = pagevec_lookup_tag(&pvec, NODE_MAPPING(sbi), &index, 1061e05df3b1SJaegeuk Kim PAGECACHE_TAG_DIRTY, 1062e05df3b1SJaegeuk Kim min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1); 1063e05df3b1SJaegeuk Kim if (nr_pages == 0) 1064e05df3b1SJaegeuk Kim break; 1065e05df3b1SJaegeuk Kim 1066e05df3b1SJaegeuk Kim for (i = 0; i < nr_pages; i++) { 1067e05df3b1SJaegeuk Kim struct page *page = pvec.pages[i]; 1068e05df3b1SJaegeuk Kim 1069e05df3b1SJaegeuk Kim /* 1070e05df3b1SJaegeuk Kim * flushing sequence with step: 1071e05df3b1SJaegeuk Kim * 0. indirect nodes 1072e05df3b1SJaegeuk Kim * 1. dentry dnodes 1073e05df3b1SJaegeuk Kim * 2. file dnodes 1074e05df3b1SJaegeuk Kim */ 1075e05df3b1SJaegeuk Kim if (step == 0 && IS_DNODE(page)) 1076e05df3b1SJaegeuk Kim continue; 1077e05df3b1SJaegeuk Kim if (step == 1 && (!IS_DNODE(page) || 1078e05df3b1SJaegeuk Kim is_cold_node(page))) 1079e05df3b1SJaegeuk Kim continue; 1080e05df3b1SJaegeuk Kim if (step == 2 && (!IS_DNODE(page) || 1081e05df3b1SJaegeuk Kim !is_cold_node(page))) 1082e05df3b1SJaegeuk Kim continue; 1083e05df3b1SJaegeuk Kim 1084e05df3b1SJaegeuk Kim /* 1085e05df3b1SJaegeuk Kim * If an fsync mode, 1086e05df3b1SJaegeuk Kim * we should not skip writing node pages. 1087e05df3b1SJaegeuk Kim */ 1088e05df3b1SJaegeuk Kim if (ino && ino_of_node(page) == ino) 1089e05df3b1SJaegeuk Kim lock_page(page); 1090e05df3b1SJaegeuk Kim else if (!trylock_page(page)) 1091e05df3b1SJaegeuk Kim continue; 1092e05df3b1SJaegeuk Kim 10934ef51a8fSJaegeuk Kim if (unlikely(page->mapping != NODE_MAPPING(sbi))) { 1094e05df3b1SJaegeuk Kim continue_unlock: 1095e05df3b1SJaegeuk Kim unlock_page(page); 1096e05df3b1SJaegeuk Kim continue; 1097e05df3b1SJaegeuk Kim } 1098e05df3b1SJaegeuk Kim if (ino && ino_of_node(page) != ino) 1099e05df3b1SJaegeuk Kim goto continue_unlock; 1100e05df3b1SJaegeuk Kim 1101e05df3b1SJaegeuk Kim if (!PageDirty(page)) { 1102e05df3b1SJaegeuk Kim /* someone wrote it for us */ 1103e05df3b1SJaegeuk Kim goto continue_unlock; 1104e05df3b1SJaegeuk Kim } 1105e05df3b1SJaegeuk Kim 1106e05df3b1SJaegeuk Kim if (!clear_page_dirty_for_io(page)) 1107e05df3b1SJaegeuk Kim goto continue_unlock; 1108e05df3b1SJaegeuk Kim 1109e05df3b1SJaegeuk Kim /* called by fsync() */ 1110e05df3b1SJaegeuk Kim if (ino && IS_DNODE(page)) { 1111e05df3b1SJaegeuk Kim int mark = !is_checkpointed_node(sbi, ino); 1112e05df3b1SJaegeuk Kim set_fsync_mark(page, 1); 1113e05df3b1SJaegeuk Kim if (IS_INODE(page)) 1114e05df3b1SJaegeuk Kim set_dentry_mark(page, mark); 1115e05df3b1SJaegeuk Kim nwritten++; 1116e05df3b1SJaegeuk Kim } else { 1117e05df3b1SJaegeuk Kim set_fsync_mark(page, 0); 1118e05df3b1SJaegeuk Kim set_dentry_mark(page, 0); 1119e05df3b1SJaegeuk Kim } 11204ef51a8fSJaegeuk Kim NODE_MAPPING(sbi)->a_ops->writepage(page, wbc); 1121e05df3b1SJaegeuk Kim wrote++; 1122e05df3b1SJaegeuk Kim 1123e05df3b1SJaegeuk Kim if (--wbc->nr_to_write == 0) 1124e05df3b1SJaegeuk Kim break; 1125e05df3b1SJaegeuk Kim } 1126e05df3b1SJaegeuk Kim pagevec_release(&pvec); 1127e05df3b1SJaegeuk Kim cond_resched(); 1128e05df3b1SJaegeuk Kim 1129e05df3b1SJaegeuk Kim if (wbc->nr_to_write == 0) { 1130e05df3b1SJaegeuk Kim step = 2; 1131e05df3b1SJaegeuk Kim break; 1132e05df3b1SJaegeuk Kim } 1133e05df3b1SJaegeuk Kim } 1134e05df3b1SJaegeuk Kim 1135e05df3b1SJaegeuk Kim if (step < 2) { 1136e05df3b1SJaegeuk Kim step++; 1137e05df3b1SJaegeuk Kim goto next_step; 1138e05df3b1SJaegeuk Kim } 1139e05df3b1SJaegeuk Kim 1140e05df3b1SJaegeuk Kim if (wrote) 1141458e6197SJaegeuk Kim f2fs_submit_merged_bio(sbi, NODE, WRITE); 1142e05df3b1SJaegeuk Kim return nwritten; 1143e05df3b1SJaegeuk Kim } 1144e05df3b1SJaegeuk Kim 1145cfe58f9dSJaegeuk Kim int wait_on_node_pages_writeback(struct f2fs_sb_info *sbi, nid_t ino) 1146cfe58f9dSJaegeuk Kim { 1147cfe58f9dSJaegeuk Kim pgoff_t index = 0, end = LONG_MAX; 1148cfe58f9dSJaegeuk Kim struct pagevec pvec; 1149cfe58f9dSJaegeuk Kim int ret2 = 0, ret = 0; 1150cfe58f9dSJaegeuk Kim 1151cfe58f9dSJaegeuk Kim pagevec_init(&pvec, 0); 11524ef51a8fSJaegeuk Kim 11534ef51a8fSJaegeuk Kim while (index <= end) { 11544ef51a8fSJaegeuk Kim int i, nr_pages; 11554ef51a8fSJaegeuk Kim nr_pages = pagevec_lookup_tag(&pvec, NODE_MAPPING(sbi), &index, 1156cfe58f9dSJaegeuk Kim PAGECACHE_TAG_WRITEBACK, 11574ef51a8fSJaegeuk Kim min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1); 11584ef51a8fSJaegeuk Kim if (nr_pages == 0) 11594ef51a8fSJaegeuk Kim break; 1160cfe58f9dSJaegeuk Kim 1161cfe58f9dSJaegeuk Kim for (i = 0; i < nr_pages; i++) { 1162cfe58f9dSJaegeuk Kim struct page *page = pvec.pages[i]; 1163cfe58f9dSJaegeuk Kim 1164cfe58f9dSJaegeuk Kim /* until radix tree lookup accepts end_index */ 1165cfb271d4SChao Yu if (unlikely(page->index > end)) 1166cfe58f9dSJaegeuk Kim continue; 1167cfe58f9dSJaegeuk Kim 11684bf08ff6SChao Yu if (ino && ino_of_node(page) == ino) { 11693cb5ad15SJaegeuk Kim f2fs_wait_on_page_writeback(page, NODE); 1170cfe58f9dSJaegeuk Kim if (TestClearPageError(page)) 1171cfe58f9dSJaegeuk Kim ret = -EIO; 1172cfe58f9dSJaegeuk Kim } 11734bf08ff6SChao Yu } 1174cfe58f9dSJaegeuk Kim pagevec_release(&pvec); 1175cfe58f9dSJaegeuk Kim cond_resched(); 1176cfe58f9dSJaegeuk Kim } 1177cfe58f9dSJaegeuk Kim 11784ef51a8fSJaegeuk Kim if (unlikely(test_and_clear_bit(AS_ENOSPC, &NODE_MAPPING(sbi)->flags))) 1179cfe58f9dSJaegeuk Kim ret2 = -ENOSPC; 11804ef51a8fSJaegeuk Kim if (unlikely(test_and_clear_bit(AS_EIO, &NODE_MAPPING(sbi)->flags))) 1181cfe58f9dSJaegeuk Kim ret2 = -EIO; 1182cfe58f9dSJaegeuk Kim if (!ret) 1183cfe58f9dSJaegeuk Kim ret = ret2; 1184cfe58f9dSJaegeuk Kim return ret; 1185cfe58f9dSJaegeuk Kim } 1186cfe58f9dSJaegeuk Kim 1187e05df3b1SJaegeuk Kim static int f2fs_write_node_page(struct page *page, 1188e05df3b1SJaegeuk Kim struct writeback_control *wbc) 1189e05df3b1SJaegeuk Kim { 1190e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(page->mapping->host->i_sb); 1191e05df3b1SJaegeuk Kim nid_t nid; 1192e05df3b1SJaegeuk Kim block_t new_addr; 1193e05df3b1SJaegeuk Kim struct node_info ni; 1194fb5566daSJaegeuk Kim struct f2fs_io_info fio = { 1195fb5566daSJaegeuk Kim .type = NODE, 1196fb5566daSJaegeuk Kim .rw = (wbc->sync_mode == WB_SYNC_ALL) ? WRITE_SYNC : WRITE, 1197fb5566daSJaegeuk Kim }; 1198e05df3b1SJaegeuk Kim 1199cfb271d4SChao Yu if (unlikely(sbi->por_doing)) 120087a9bd26SJaegeuk Kim goto redirty_out; 120187a9bd26SJaegeuk Kim 12023cb5ad15SJaegeuk Kim f2fs_wait_on_page_writeback(page, NODE); 1203e05df3b1SJaegeuk Kim 1204e05df3b1SJaegeuk Kim /* get old block addr of this node page */ 1205e05df3b1SJaegeuk Kim nid = nid_of_node(page); 12065d56b671SJaegeuk Kim f2fs_bug_on(page->index != nid); 1207e05df3b1SJaegeuk Kim 1208e05df3b1SJaegeuk Kim get_node_info(sbi, nid, &ni); 1209e05df3b1SJaegeuk Kim 1210e05df3b1SJaegeuk Kim /* This page is already truncated */ 12116bacf52fSJaegeuk Kim if (unlikely(ni.blk_addr == NULL_ADDR)) { 121239936837SJaegeuk Kim dec_page_count(sbi, F2FS_DIRTY_NODES); 121339936837SJaegeuk Kim unlock_page(page); 121439936837SJaegeuk Kim return 0; 121539936837SJaegeuk Kim } 1216e05df3b1SJaegeuk Kim 121787a9bd26SJaegeuk Kim if (wbc->for_reclaim) 121887a9bd26SJaegeuk Kim goto redirty_out; 121908d8058bSJaegeuk Kim 122039936837SJaegeuk Kim mutex_lock(&sbi->node_write); 1221e05df3b1SJaegeuk Kim set_page_writeback(page); 1222fb5566daSJaegeuk Kim write_node_page(sbi, page, &fio, nid, ni.blk_addr, &new_addr); 1223479f40c4SJaegeuk Kim set_node_addr(sbi, &ni, new_addr, is_fsync_dnode(page)); 1224e05df3b1SJaegeuk Kim dec_page_count(sbi, F2FS_DIRTY_NODES); 122539936837SJaegeuk Kim mutex_unlock(&sbi->node_write); 1226e05df3b1SJaegeuk Kim unlock_page(page); 1227e05df3b1SJaegeuk Kim return 0; 122887a9bd26SJaegeuk Kim 122987a9bd26SJaegeuk Kim redirty_out: 123087a9bd26SJaegeuk Kim dec_page_count(sbi, F2FS_DIRTY_NODES); 123187a9bd26SJaegeuk Kim wbc->pages_skipped++; 12329cf3c389SChao Yu account_page_redirty(page); 123387a9bd26SJaegeuk Kim set_page_dirty(page); 123487a9bd26SJaegeuk Kim return AOP_WRITEPAGE_ACTIVATE; 1235e05df3b1SJaegeuk Kim } 1236e05df3b1SJaegeuk Kim 1237e05df3b1SJaegeuk Kim static int f2fs_write_node_pages(struct address_space *mapping, 1238e05df3b1SJaegeuk Kim struct writeback_control *wbc) 1239e05df3b1SJaegeuk Kim { 1240e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(mapping->host->i_sb); 124150c8cdb3SJaegeuk Kim long diff; 1242e05df3b1SJaegeuk Kim 12434660f9c0SJaegeuk Kim /* balancing f2fs's metadata in background */ 12444660f9c0SJaegeuk Kim f2fs_balance_fs_bg(sbi); 1245e05df3b1SJaegeuk Kim 1246a7fdffbdSJaegeuk Kim /* collect a number of dirty node pages and write together */ 124787d6f890SJaegeuk Kim if (get_pages(sbi, F2FS_DIRTY_NODES) < nr_pages_to_skip(sbi, NODE)) 1248d3baf95dSJaegeuk Kim goto skip_write; 1249a7fdffbdSJaegeuk Kim 125050c8cdb3SJaegeuk Kim diff = nr_pages_to_write(sbi, NODE, wbc); 1251fb5566daSJaegeuk Kim wbc->sync_mode = WB_SYNC_NONE; 1252e05df3b1SJaegeuk Kim sync_node_pages(sbi, 0, wbc); 125350c8cdb3SJaegeuk Kim wbc->nr_to_write = max((long)0, wbc->nr_to_write - diff); 1254e05df3b1SJaegeuk Kim return 0; 1255d3baf95dSJaegeuk Kim 1256d3baf95dSJaegeuk Kim skip_write: 1257d3baf95dSJaegeuk Kim wbc->pages_skipped += get_pages(sbi, F2FS_DIRTY_NODES); 1258d3baf95dSJaegeuk Kim return 0; 1259e05df3b1SJaegeuk Kim } 1260e05df3b1SJaegeuk Kim 1261e05df3b1SJaegeuk Kim static int f2fs_set_node_page_dirty(struct page *page) 1262e05df3b1SJaegeuk Kim { 1263e05df3b1SJaegeuk Kim struct address_space *mapping = page->mapping; 1264e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(mapping->host->i_sb); 1265e05df3b1SJaegeuk Kim 126626c6b887SJaegeuk Kim trace_f2fs_set_page_dirty(page, NODE); 126726c6b887SJaegeuk Kim 1268e05df3b1SJaegeuk Kim SetPageUptodate(page); 1269e05df3b1SJaegeuk Kim if (!PageDirty(page)) { 1270e05df3b1SJaegeuk Kim __set_page_dirty_nobuffers(page); 1271e05df3b1SJaegeuk Kim inc_page_count(sbi, F2FS_DIRTY_NODES); 1272e05df3b1SJaegeuk Kim SetPagePrivate(page); 1273e05df3b1SJaegeuk Kim return 1; 1274e05df3b1SJaegeuk Kim } 1275e05df3b1SJaegeuk Kim return 0; 1276e05df3b1SJaegeuk Kim } 1277e05df3b1SJaegeuk Kim 1278d47992f8SLukas Czerner static void f2fs_invalidate_node_page(struct page *page, unsigned int offset, 1279d47992f8SLukas Czerner unsigned int length) 1280e05df3b1SJaegeuk Kim { 1281e05df3b1SJaegeuk Kim struct inode *inode = page->mapping->host; 1282e05df3b1SJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); 1283e05df3b1SJaegeuk Kim if (PageDirty(page)) 1284e05df3b1SJaegeuk Kim dec_page_count(sbi, F2FS_DIRTY_NODES); 1285e05df3b1SJaegeuk Kim ClearPagePrivate(page); 1286e05df3b1SJaegeuk Kim } 1287e05df3b1SJaegeuk Kim 1288e05df3b1SJaegeuk Kim static int f2fs_release_node_page(struct page *page, gfp_t wait) 1289e05df3b1SJaegeuk Kim { 1290e05df3b1SJaegeuk Kim ClearPagePrivate(page); 1291c3850aa1SJaegeuk Kim return 1; 1292e05df3b1SJaegeuk Kim } 1293e05df3b1SJaegeuk Kim 12940a8165d7SJaegeuk Kim /* 1295e05df3b1SJaegeuk Kim * Structure of the f2fs node operations 1296e05df3b1SJaegeuk Kim */ 1297e05df3b1SJaegeuk Kim const struct address_space_operations f2fs_node_aops = { 1298e05df3b1SJaegeuk Kim .writepage = f2fs_write_node_page, 1299e05df3b1SJaegeuk Kim .writepages = f2fs_write_node_pages, 1300e05df3b1SJaegeuk Kim .set_page_dirty = f2fs_set_node_page_dirty, 1301e05df3b1SJaegeuk Kim .invalidatepage = f2fs_invalidate_node_page, 1302e05df3b1SJaegeuk Kim .releasepage = f2fs_release_node_page, 1303e05df3b1SJaegeuk Kim }; 1304e05df3b1SJaegeuk Kim 13058a7ed66aSJaegeuk Kim static struct free_nid *__lookup_free_nid_list(struct f2fs_nm_info *nm_i, 13068a7ed66aSJaegeuk Kim nid_t n) 1307e05df3b1SJaegeuk Kim { 13088a7ed66aSJaegeuk Kim return radix_tree_lookup(&nm_i->free_nid_root, n); 13093aa770a9SNamjae Jeon } 1310e05df3b1SJaegeuk Kim 13118a7ed66aSJaegeuk Kim static void __del_from_free_nid_list(struct f2fs_nm_info *nm_i, 13128a7ed66aSJaegeuk Kim struct free_nid *i) 1313e05df3b1SJaegeuk Kim { 1314e05df3b1SJaegeuk Kim list_del(&i->list); 13158a7ed66aSJaegeuk Kim radix_tree_delete(&nm_i->free_nid_root, i->nid); 1316e05df3b1SJaegeuk Kim } 1317e05df3b1SJaegeuk Kim 131859bbd474SJaegeuk Kim static int add_free_nid(struct f2fs_nm_info *nm_i, nid_t nid, bool build) 1319e05df3b1SJaegeuk Kim { 1320e05df3b1SJaegeuk Kim struct free_nid *i; 132159bbd474SJaegeuk Kim struct nat_entry *ne; 132259bbd474SJaegeuk Kim bool allocated = false; 1323e05df3b1SJaegeuk Kim 1324cdfc41c1SJaegeuk Kim if (!available_free_memory(nm_i, FREE_NIDS)) 132523d38844SHaicheng Li return -1; 13269198acebSJaegeuk Kim 13279198acebSJaegeuk Kim /* 0 nid should not be used */ 1328cfb271d4SChao Yu if (unlikely(nid == 0)) 13299198acebSJaegeuk Kim return 0; 133059bbd474SJaegeuk Kim 13317bd59381SGu Zheng if (build) { 133259bbd474SJaegeuk Kim /* do not add allocated nids */ 133359bbd474SJaegeuk Kim read_lock(&nm_i->nat_tree_lock); 133459bbd474SJaegeuk Kim ne = __lookup_nat_cache(nm_i, nid); 13358a7ed66aSJaegeuk Kim if (ne && 13368a7ed66aSJaegeuk Kim (!ne->checkpointed || nat_get_blkaddr(ne) != NULL_ADDR)) 133759bbd474SJaegeuk Kim allocated = true; 133859bbd474SJaegeuk Kim read_unlock(&nm_i->nat_tree_lock); 133959bbd474SJaegeuk Kim if (allocated) 134059bbd474SJaegeuk Kim return 0; 1341e05df3b1SJaegeuk Kim } 13427bd59381SGu Zheng 13437bd59381SGu Zheng i = f2fs_kmem_cache_alloc(free_nid_slab, GFP_NOFS); 1344e05df3b1SJaegeuk Kim i->nid = nid; 1345e05df3b1SJaegeuk Kim i->state = NID_NEW; 1346e05df3b1SJaegeuk Kim 1347e05df3b1SJaegeuk Kim spin_lock(&nm_i->free_nid_list_lock); 13488a7ed66aSJaegeuk Kim if (radix_tree_insert(&nm_i->free_nid_root, i->nid, i)) { 1349e05df3b1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1350e05df3b1SJaegeuk Kim kmem_cache_free(free_nid_slab, i); 1351e05df3b1SJaegeuk Kim return 0; 1352e05df3b1SJaegeuk Kim } 1353e05df3b1SJaegeuk Kim list_add_tail(&i->list, &nm_i->free_nid_list); 1354e05df3b1SJaegeuk Kim nm_i->fcnt++; 1355e05df3b1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1356e05df3b1SJaegeuk Kim return 1; 1357e05df3b1SJaegeuk Kim } 1358e05df3b1SJaegeuk Kim 1359e05df3b1SJaegeuk Kim static void remove_free_nid(struct f2fs_nm_info *nm_i, nid_t nid) 1360e05df3b1SJaegeuk Kim { 1361e05df3b1SJaegeuk Kim struct free_nid *i; 1362cf0ee0f0SChao Yu bool need_free = false; 1363cf0ee0f0SChao Yu 1364e05df3b1SJaegeuk Kim spin_lock(&nm_i->free_nid_list_lock); 13658a7ed66aSJaegeuk Kim i = __lookup_free_nid_list(nm_i, nid); 1366e05df3b1SJaegeuk Kim if (i && i->state == NID_NEW) { 13678a7ed66aSJaegeuk Kim __del_from_free_nid_list(nm_i, i); 1368e05df3b1SJaegeuk Kim nm_i->fcnt--; 1369cf0ee0f0SChao Yu need_free = true; 1370e05df3b1SJaegeuk Kim } 1371e05df3b1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1372cf0ee0f0SChao Yu 1373cf0ee0f0SChao Yu if (need_free) 1374cf0ee0f0SChao Yu kmem_cache_free(free_nid_slab, i); 1375e05df3b1SJaegeuk Kim } 1376e05df3b1SJaegeuk Kim 13778760952dSHaicheng Li static void scan_nat_page(struct f2fs_nm_info *nm_i, 1378e05df3b1SJaegeuk Kim struct page *nat_page, nid_t start_nid) 1379e05df3b1SJaegeuk Kim { 1380e05df3b1SJaegeuk Kim struct f2fs_nat_block *nat_blk = page_address(nat_page); 1381e05df3b1SJaegeuk Kim block_t blk_addr; 1382e05df3b1SJaegeuk Kim int i; 1383e05df3b1SJaegeuk Kim 1384e05df3b1SJaegeuk Kim i = start_nid % NAT_ENTRY_PER_BLOCK; 1385e05df3b1SJaegeuk Kim 1386e05df3b1SJaegeuk Kim for (; i < NAT_ENTRY_PER_BLOCK; i++, start_nid++) { 138723d38844SHaicheng Li 1388cfb271d4SChao Yu if (unlikely(start_nid >= nm_i->max_nid)) 138904431c44SJaegeuk Kim break; 139023d38844SHaicheng Li 1391e05df3b1SJaegeuk Kim blk_addr = le32_to_cpu(nat_blk->entries[i].block_addr); 13925d56b671SJaegeuk Kim f2fs_bug_on(blk_addr == NEW_ADDR); 139323d38844SHaicheng Li if (blk_addr == NULL_ADDR) { 139459bbd474SJaegeuk Kim if (add_free_nid(nm_i, start_nid, true) < 0) 139523d38844SHaicheng Li break; 139623d38844SHaicheng Li } 1397e05df3b1SJaegeuk Kim } 1398e05df3b1SJaegeuk Kim } 1399e05df3b1SJaegeuk Kim 1400e05df3b1SJaegeuk Kim static void build_free_nids(struct f2fs_sb_info *sbi) 1401e05df3b1SJaegeuk Kim { 1402e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1403e05df3b1SJaegeuk Kim struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); 1404e05df3b1SJaegeuk Kim struct f2fs_summary_block *sum = curseg->sum_blk; 14058760952dSHaicheng Li int i = 0; 140655008d84SJaegeuk Kim nid_t nid = nm_i->next_scan_nid; 1407e05df3b1SJaegeuk Kim 140855008d84SJaegeuk Kim /* Enough entries */ 140955008d84SJaegeuk Kim if (nm_i->fcnt > NAT_ENTRY_PER_BLOCK) 141055008d84SJaegeuk Kim return; 1411e05df3b1SJaegeuk Kim 141255008d84SJaegeuk Kim /* readahead nat pages to be scanned */ 1413662befdaSChao Yu ra_meta_pages(sbi, NAT_BLOCK_OFFSET(nid), FREE_NID_PAGES, META_NAT); 1414e05df3b1SJaegeuk Kim 1415e05df3b1SJaegeuk Kim while (1) { 1416e05df3b1SJaegeuk Kim struct page *page = get_current_nat_page(sbi, nid); 1417e05df3b1SJaegeuk Kim 14188760952dSHaicheng Li scan_nat_page(nm_i, page, nid); 1419e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 1420e05df3b1SJaegeuk Kim 1421e05df3b1SJaegeuk Kim nid += (NAT_ENTRY_PER_BLOCK - (nid % NAT_ENTRY_PER_BLOCK)); 1422cfb271d4SChao Yu if (unlikely(nid >= nm_i->max_nid)) 1423e05df3b1SJaegeuk Kim nid = 0; 142455008d84SJaegeuk Kim 142555008d84SJaegeuk Kim if (i++ == FREE_NID_PAGES) 1426e05df3b1SJaegeuk Kim break; 1427e05df3b1SJaegeuk Kim } 1428e05df3b1SJaegeuk Kim 142955008d84SJaegeuk Kim /* go to the next free nat pages to find free nids abundantly */ 143055008d84SJaegeuk Kim nm_i->next_scan_nid = nid; 1431e05df3b1SJaegeuk Kim 1432e05df3b1SJaegeuk Kim /* find free nids from current sum_pages */ 1433e05df3b1SJaegeuk Kim mutex_lock(&curseg->curseg_mutex); 1434e05df3b1SJaegeuk Kim for (i = 0; i < nats_in_cursum(sum); i++) { 1435e05df3b1SJaegeuk Kim block_t addr = le32_to_cpu(nat_in_journal(sum, i).block_addr); 1436e05df3b1SJaegeuk Kim nid = le32_to_cpu(nid_in_journal(sum, i)); 1437e05df3b1SJaegeuk Kim if (addr == NULL_ADDR) 143859bbd474SJaegeuk Kim add_free_nid(nm_i, nid, true); 1439e05df3b1SJaegeuk Kim else 1440e05df3b1SJaegeuk Kim remove_free_nid(nm_i, nid); 1441e05df3b1SJaegeuk Kim } 1442e05df3b1SJaegeuk Kim mutex_unlock(&curseg->curseg_mutex); 1443e05df3b1SJaegeuk Kim } 1444e05df3b1SJaegeuk Kim 1445e05df3b1SJaegeuk Kim /* 1446e05df3b1SJaegeuk Kim * If this function returns success, caller can obtain a new nid 1447e05df3b1SJaegeuk Kim * from second parameter of this function. 1448e05df3b1SJaegeuk Kim * The returned nid could be used ino as well as nid when inode is created. 1449e05df3b1SJaegeuk Kim */ 1450e05df3b1SJaegeuk Kim bool alloc_nid(struct f2fs_sb_info *sbi, nid_t *nid) 1451e05df3b1SJaegeuk Kim { 1452e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1453e05df3b1SJaegeuk Kim struct free_nid *i = NULL; 1454e05df3b1SJaegeuk Kim struct list_head *this; 1455e05df3b1SJaegeuk Kim retry: 1456cfb271d4SChao Yu if (unlikely(sbi->total_valid_node_count + 1 >= nm_i->max_nid)) 1457e05df3b1SJaegeuk Kim return false; 1458e05df3b1SJaegeuk Kim 1459e05df3b1SJaegeuk Kim spin_lock(&nm_i->free_nid_list_lock); 1460e05df3b1SJaegeuk Kim 146155008d84SJaegeuk Kim /* We should not use stale free nids created by build_free_nids */ 1462f978f5a0SGu Zheng if (nm_i->fcnt && !on_build_free_nids(nm_i)) { 14635d56b671SJaegeuk Kim f2fs_bug_on(list_empty(&nm_i->free_nid_list)); 1464e05df3b1SJaegeuk Kim list_for_each(this, &nm_i->free_nid_list) { 1465e05df3b1SJaegeuk Kim i = list_entry(this, struct free_nid, list); 1466e05df3b1SJaegeuk Kim if (i->state == NID_NEW) 1467e05df3b1SJaegeuk Kim break; 1468e05df3b1SJaegeuk Kim } 1469e05df3b1SJaegeuk Kim 14705d56b671SJaegeuk Kim f2fs_bug_on(i->state != NID_NEW); 1471e05df3b1SJaegeuk Kim *nid = i->nid; 1472e05df3b1SJaegeuk Kim i->state = NID_ALLOC; 1473e05df3b1SJaegeuk Kim nm_i->fcnt--; 1474e05df3b1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1475e05df3b1SJaegeuk Kim return true; 1476e05df3b1SJaegeuk Kim } 147755008d84SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 147855008d84SJaegeuk Kim 147955008d84SJaegeuk Kim /* Let's scan nat pages and its caches to get free nids */ 148055008d84SJaegeuk Kim mutex_lock(&nm_i->build_lock); 148155008d84SJaegeuk Kim build_free_nids(sbi); 148255008d84SJaegeuk Kim mutex_unlock(&nm_i->build_lock); 148355008d84SJaegeuk Kim goto retry; 148455008d84SJaegeuk Kim } 1485e05df3b1SJaegeuk Kim 14860a8165d7SJaegeuk Kim /* 1487e05df3b1SJaegeuk Kim * alloc_nid() should be called prior to this function. 1488e05df3b1SJaegeuk Kim */ 1489e05df3b1SJaegeuk Kim void alloc_nid_done(struct f2fs_sb_info *sbi, nid_t nid) 1490e05df3b1SJaegeuk Kim { 1491e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1492e05df3b1SJaegeuk Kim struct free_nid *i; 1493e05df3b1SJaegeuk Kim 1494e05df3b1SJaegeuk Kim spin_lock(&nm_i->free_nid_list_lock); 14958a7ed66aSJaegeuk Kim i = __lookup_free_nid_list(nm_i, nid); 14965d56b671SJaegeuk Kim f2fs_bug_on(!i || i->state != NID_ALLOC); 14978a7ed66aSJaegeuk Kim __del_from_free_nid_list(nm_i, i); 1498e05df3b1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1499cf0ee0f0SChao Yu 1500cf0ee0f0SChao Yu kmem_cache_free(free_nid_slab, i); 1501e05df3b1SJaegeuk Kim } 1502e05df3b1SJaegeuk Kim 15030a8165d7SJaegeuk Kim /* 1504e05df3b1SJaegeuk Kim * alloc_nid() should be called prior to this function. 1505e05df3b1SJaegeuk Kim */ 1506e05df3b1SJaegeuk Kim void alloc_nid_failed(struct f2fs_sb_info *sbi, nid_t nid) 1507e05df3b1SJaegeuk Kim { 150849952fa1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 150949952fa1SJaegeuk Kim struct free_nid *i; 1510cf0ee0f0SChao Yu bool need_free = false; 151149952fa1SJaegeuk Kim 151265985d93SJaegeuk Kim if (!nid) 151365985d93SJaegeuk Kim return; 151465985d93SJaegeuk Kim 151549952fa1SJaegeuk Kim spin_lock(&nm_i->free_nid_list_lock); 15168a7ed66aSJaegeuk Kim i = __lookup_free_nid_list(nm_i, nid); 15175d56b671SJaegeuk Kim f2fs_bug_on(!i || i->state != NID_ALLOC); 1518cdfc41c1SJaegeuk Kim if (!available_free_memory(nm_i, FREE_NIDS)) { 15198a7ed66aSJaegeuk Kim __del_from_free_nid_list(nm_i, i); 1520cf0ee0f0SChao Yu need_free = true; 152195630cbaSHaicheng Li } else { 152249952fa1SJaegeuk Kim i->state = NID_NEW; 152349952fa1SJaegeuk Kim nm_i->fcnt++; 152495630cbaSHaicheng Li } 152549952fa1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1526cf0ee0f0SChao Yu 1527cf0ee0f0SChao Yu if (need_free) 1528cf0ee0f0SChao Yu kmem_cache_free(free_nid_slab, i); 1529e05df3b1SJaegeuk Kim } 1530e05df3b1SJaegeuk Kim 1531e05df3b1SJaegeuk Kim void recover_node_page(struct f2fs_sb_info *sbi, struct page *page, 1532e05df3b1SJaegeuk Kim struct f2fs_summary *sum, struct node_info *ni, 1533e05df3b1SJaegeuk Kim block_t new_blkaddr) 1534e05df3b1SJaegeuk Kim { 1535e05df3b1SJaegeuk Kim rewrite_node_page(sbi, page, sum, ni->blk_addr, new_blkaddr); 1536479f40c4SJaegeuk Kim set_node_addr(sbi, ni, new_blkaddr, false); 1537e05df3b1SJaegeuk Kim clear_node_page_dirty(page); 1538e05df3b1SJaegeuk Kim } 1539e05df3b1SJaegeuk Kim 154028cdce04SChao Yu void recover_inline_xattr(struct inode *inode, struct page *page) 154128cdce04SChao Yu { 154228cdce04SChao Yu struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); 154328cdce04SChao Yu void *src_addr, *dst_addr; 154428cdce04SChao Yu size_t inline_size; 154528cdce04SChao Yu struct page *ipage; 154628cdce04SChao Yu struct f2fs_inode *ri; 154728cdce04SChao Yu 1548987c7c31SChao Yu if (!f2fs_has_inline_xattr(inode)) 154928cdce04SChao Yu return; 155028cdce04SChao Yu 155128cdce04SChao Yu if (!IS_INODE(page)) 155228cdce04SChao Yu return; 155328cdce04SChao Yu 155428cdce04SChao Yu ri = F2FS_INODE(page); 155528cdce04SChao Yu if (!(ri->i_inline & F2FS_INLINE_XATTR)) 155628cdce04SChao Yu return; 155728cdce04SChao Yu 155828cdce04SChao Yu ipage = get_node_page(sbi, inode->i_ino); 155928cdce04SChao Yu f2fs_bug_on(IS_ERR(ipage)); 156028cdce04SChao Yu 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 156528cdce04SChao Yu memcpy(dst_addr, src_addr, inline_size); 156628cdce04SChao Yu 156728cdce04SChao Yu update_inode(inode, ipage); 156828cdce04SChao Yu f2fs_put_page(ipage, 1); 156928cdce04SChao Yu } 157028cdce04SChao Yu 1571abb2366cSJaegeuk Kim bool recover_xattr_data(struct inode *inode, struct page *page, block_t blkaddr) 1572abb2366cSJaegeuk Kim { 1573abb2366cSJaegeuk Kim struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); 1574abb2366cSJaegeuk Kim nid_t prev_xnid = F2FS_I(inode)->i_xattr_nid; 1575abb2366cSJaegeuk Kim nid_t new_xnid = nid_of_node(page); 1576abb2366cSJaegeuk Kim struct node_info ni; 1577abb2366cSJaegeuk Kim 157828cdce04SChao Yu recover_inline_xattr(inode, page); 157928cdce04SChao Yu 15804bc8e9bcSChao Yu if (!f2fs_has_xattr_block(ofs_of_node(page))) 1581abb2366cSJaegeuk Kim return false; 1582abb2366cSJaegeuk Kim 1583abb2366cSJaegeuk Kim /* 1: invalidate the previous xattr nid */ 1584abb2366cSJaegeuk Kim if (!prev_xnid) 1585abb2366cSJaegeuk Kim goto recover_xnid; 1586abb2366cSJaegeuk Kim 1587abb2366cSJaegeuk Kim /* Deallocate node address */ 1588abb2366cSJaegeuk Kim get_node_info(sbi, prev_xnid, &ni); 1589abb2366cSJaegeuk Kim f2fs_bug_on(ni.blk_addr == NULL_ADDR); 1590abb2366cSJaegeuk Kim invalidate_blocks(sbi, ni.blk_addr); 1591abb2366cSJaegeuk Kim dec_valid_node_count(sbi, inode); 1592479f40c4SJaegeuk Kim set_node_addr(sbi, &ni, NULL_ADDR, false); 1593abb2366cSJaegeuk Kim 1594abb2366cSJaegeuk Kim recover_xnid: 1595abb2366cSJaegeuk Kim /* 2: allocate new xattr nid */ 1596abb2366cSJaegeuk Kim if (unlikely(!inc_valid_node_count(sbi, inode))) 1597abb2366cSJaegeuk Kim f2fs_bug_on(1); 1598abb2366cSJaegeuk Kim 1599abb2366cSJaegeuk Kim remove_free_nid(NM_I(sbi), new_xnid); 1600abb2366cSJaegeuk Kim get_node_info(sbi, new_xnid, &ni); 1601abb2366cSJaegeuk Kim ni.ino = inode->i_ino; 1602479f40c4SJaegeuk Kim set_node_addr(sbi, &ni, NEW_ADDR, false); 1603abb2366cSJaegeuk Kim F2FS_I(inode)->i_xattr_nid = new_xnid; 1604abb2366cSJaegeuk Kim 1605abb2366cSJaegeuk Kim /* 3: update xattr blkaddr */ 1606abb2366cSJaegeuk Kim refresh_sit_entry(sbi, NEW_ADDR, blkaddr); 1607479f40c4SJaegeuk Kim set_node_addr(sbi, &ni, blkaddr, false); 1608abb2366cSJaegeuk Kim 1609abb2366cSJaegeuk Kim update_inode_page(inode); 1610abb2366cSJaegeuk Kim return true; 1611abb2366cSJaegeuk Kim } 1612abb2366cSJaegeuk Kim 1613e05df3b1SJaegeuk Kim int recover_inode_page(struct f2fs_sb_info *sbi, struct page *page) 1614e05df3b1SJaegeuk Kim { 161558bfaf44SJaegeuk Kim struct f2fs_inode *src, *dst; 1616e05df3b1SJaegeuk Kim nid_t ino = ino_of_node(page); 1617e05df3b1SJaegeuk Kim struct node_info old_ni, new_ni; 1618e05df3b1SJaegeuk Kim struct page *ipage; 1619e05df3b1SJaegeuk 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 get_node_info(sbi, ino, &old_ni); 1628e05df3b1SJaegeuk Kim SetPageUptodate(ipage); 1629e05df3b1SJaegeuk Kim fill_node_footer(ipage, ino, ino, 0, true); 1630e05df3b1SJaegeuk Kim 163158bfaf44SJaegeuk Kim src = F2FS_INODE(page); 163258bfaf44SJaegeuk Kim dst = F2FS_INODE(ipage); 1633e05df3b1SJaegeuk Kim 163458bfaf44SJaegeuk Kim memcpy(dst, src, (unsigned long)&src->i_ext - (unsigned long)src); 163558bfaf44SJaegeuk Kim dst->i_size = 0; 163658bfaf44SJaegeuk Kim dst->i_blocks = cpu_to_le64(1); 163758bfaf44SJaegeuk Kim dst->i_links = cpu_to_le32(1); 163858bfaf44SJaegeuk Kim dst->i_xattr_nid = 0; 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); 1647e05df3b1SJaegeuk Kim f2fs_put_page(ipage, 1); 1648e05df3b1SJaegeuk Kim return 0; 1649e05df3b1SJaegeuk Kim } 1650e05df3b1SJaegeuk Kim 16519af0ff1cSChao Yu /* 16529af0ff1cSChao Yu * ra_sum_pages() merge contiguous pages into one bio and submit. 16539af0ff1cSChao Yu * these pre-readed pages are linked in pages list. 16549af0ff1cSChao Yu */ 16559af0ff1cSChao Yu static int ra_sum_pages(struct f2fs_sb_info *sbi, struct list_head *pages, 16569af0ff1cSChao Yu int start, int nrpages) 16579af0ff1cSChao Yu { 16589af0ff1cSChao Yu struct page *page; 16599af0ff1cSChao Yu int page_idx = start; 1660458e6197SJaegeuk Kim struct f2fs_io_info fio = { 1661458e6197SJaegeuk Kim .type = META, 16627e8f2308SGu Zheng .rw = READ_SYNC | REQ_META | REQ_PRIO 1663458e6197SJaegeuk Kim }; 16649af0ff1cSChao Yu 16659af0ff1cSChao Yu for (; page_idx < start + nrpages; page_idx++) { 16669af0ff1cSChao Yu /* alloc temporal page for read node summary info*/ 1667a0acdfe0SChao Yu page = alloc_page(GFP_F2FS_ZERO); 1668d653788aSGu Zheng if (!page) 1669d653788aSGu Zheng break; 16709af0ff1cSChao Yu 16719af0ff1cSChao Yu lock_page(page); 16729af0ff1cSChao Yu page->index = page_idx; 16739af0ff1cSChao Yu list_add_tail(&page->lru, pages); 16749af0ff1cSChao Yu } 16759af0ff1cSChao Yu 16769af0ff1cSChao Yu list_for_each_entry(page, pages, lru) 1677458e6197SJaegeuk Kim f2fs_submit_page_mbio(sbi, page, page->index, &fio); 16789af0ff1cSChao Yu 1679458e6197SJaegeuk Kim f2fs_submit_merged_bio(sbi, META, READ); 1680d653788aSGu Zheng 1681d653788aSGu Zheng return page_idx - start; 16829af0ff1cSChao Yu } 16839af0ff1cSChao Yu 1684e05df3b1SJaegeuk Kim int restore_node_summary(struct f2fs_sb_info *sbi, 1685e05df3b1SJaegeuk Kim unsigned int segno, struct f2fs_summary_block *sum) 1686e05df3b1SJaegeuk Kim { 1687e05df3b1SJaegeuk Kim struct f2fs_node *rn; 1688e05df3b1SJaegeuk Kim struct f2fs_summary *sum_entry; 16899af0ff1cSChao Yu struct page *page, *tmp; 1690e05df3b1SJaegeuk Kim block_t addr; 16919af0ff1cSChao Yu int bio_blocks = MAX_BIO_BLOCKS(max_hw_blocks(sbi)); 16929af0ff1cSChao Yu int i, last_offset, nrpages, err = 0; 16939af0ff1cSChao Yu LIST_HEAD(page_list); 1694e05df3b1SJaegeuk Kim 1695e05df3b1SJaegeuk Kim /* scan the node segment */ 1696e05df3b1SJaegeuk Kim last_offset = sbi->blocks_per_seg; 1697e05df3b1SJaegeuk Kim addr = START_BLOCK(sbi, segno); 1698e05df3b1SJaegeuk Kim sum_entry = &sum->entries[0]; 1699e05df3b1SJaegeuk Kim 1700d653788aSGu Zheng for (i = 0; !err && i < last_offset; i += nrpages, addr += nrpages) { 17019af0ff1cSChao Yu nrpages = min(last_offset - i, bio_blocks); 1702393ff91fSJaegeuk Kim 17039af0ff1cSChao Yu /* read ahead node pages */ 1704d653788aSGu Zheng nrpages = ra_sum_pages(sbi, &page_list, addr, nrpages); 1705d653788aSGu Zheng if (!nrpages) 1706d653788aSGu Zheng return -ENOMEM; 17079af0ff1cSChao Yu 17089af0ff1cSChao Yu list_for_each_entry_safe(page, tmp, &page_list, lru) { 1709d653788aSGu Zheng if (err) 1710d653788aSGu Zheng goto skip; 1711393ff91fSJaegeuk Kim 1712393ff91fSJaegeuk Kim lock_page(page); 17136bacf52fSJaegeuk Kim if (unlikely(!PageUptodate(page))) { 17146bacf52fSJaegeuk Kim err = -EIO; 17156bacf52fSJaegeuk Kim } else { 171645590710SGu Zheng rn = F2FS_NODE(page); 1717393ff91fSJaegeuk Kim sum_entry->nid = rn->footer.nid; 1718393ff91fSJaegeuk Kim sum_entry->version = 0; 1719393ff91fSJaegeuk Kim sum_entry->ofs_in_node = 0; 17209af0ff1cSChao Yu sum_entry++; 1721e05df3b1SJaegeuk Kim } 1722e05df3b1SJaegeuk Kim unlock_page(page); 1723d653788aSGu Zheng skip: 1724d653788aSGu Zheng list_del(&page->lru); 1725e05df3b1SJaegeuk Kim __free_pages(page, 0); 17269af0ff1cSChao Yu } 17279af0ff1cSChao Yu } 17289af0ff1cSChao Yu return err; 1729e05df3b1SJaegeuk Kim } 1730e05df3b1SJaegeuk Kim 1731e05df3b1SJaegeuk Kim static bool flush_nats_in_journal(struct f2fs_sb_info *sbi) 1732e05df3b1SJaegeuk Kim { 1733e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1734e05df3b1SJaegeuk Kim struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); 1735e05df3b1SJaegeuk Kim struct f2fs_summary_block *sum = curseg->sum_blk; 1736e05df3b1SJaegeuk Kim int i; 1737e05df3b1SJaegeuk Kim 1738e05df3b1SJaegeuk Kim mutex_lock(&curseg->curseg_mutex); 1739e05df3b1SJaegeuk Kim 1740e05df3b1SJaegeuk Kim if (nats_in_cursum(sum) < NAT_JOURNAL_ENTRIES) { 1741e05df3b1SJaegeuk Kim mutex_unlock(&curseg->curseg_mutex); 1742e05df3b1SJaegeuk Kim return false; 1743e05df3b1SJaegeuk Kim } 1744e05df3b1SJaegeuk Kim 1745e05df3b1SJaegeuk Kim for (i = 0; i < nats_in_cursum(sum); i++) { 1746e05df3b1SJaegeuk Kim struct nat_entry *ne; 1747e05df3b1SJaegeuk Kim struct f2fs_nat_entry raw_ne; 1748e05df3b1SJaegeuk Kim nid_t nid = le32_to_cpu(nid_in_journal(sum, i)); 1749e05df3b1SJaegeuk Kim 1750e05df3b1SJaegeuk Kim raw_ne = nat_in_journal(sum, i); 1751e05df3b1SJaegeuk Kim retry: 1752e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 1753e05df3b1SJaegeuk Kim ne = __lookup_nat_cache(nm_i, nid); 1754e05df3b1SJaegeuk Kim if (ne) { 1755e05df3b1SJaegeuk Kim __set_nat_cache_dirty(nm_i, ne); 1756e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 1757e05df3b1SJaegeuk Kim continue; 1758e05df3b1SJaegeuk Kim } 1759e05df3b1SJaegeuk Kim ne = grab_nat_entry(nm_i, nid); 1760e05df3b1SJaegeuk Kim if (!ne) { 1761e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 1762e05df3b1SJaegeuk Kim goto retry; 1763e05df3b1SJaegeuk Kim } 1764e05df3b1SJaegeuk Kim nat_set_blkaddr(ne, le32_to_cpu(raw_ne.block_addr)); 1765e05df3b1SJaegeuk Kim nat_set_ino(ne, le32_to_cpu(raw_ne.ino)); 1766e05df3b1SJaegeuk Kim nat_set_version(ne, raw_ne.version); 1767e05df3b1SJaegeuk Kim __set_nat_cache_dirty(nm_i, ne); 1768e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 1769e05df3b1SJaegeuk Kim } 1770e05df3b1SJaegeuk Kim update_nats_in_cursum(sum, -i); 1771e05df3b1SJaegeuk Kim mutex_unlock(&curseg->curseg_mutex); 1772e05df3b1SJaegeuk Kim return true; 1773e05df3b1SJaegeuk Kim } 1774e05df3b1SJaegeuk Kim 17750a8165d7SJaegeuk Kim /* 1776e05df3b1SJaegeuk Kim * This function is called during the checkpointing process. 1777e05df3b1SJaegeuk Kim */ 1778e05df3b1SJaegeuk Kim void flush_nat_entries(struct f2fs_sb_info *sbi) 1779e05df3b1SJaegeuk Kim { 1780e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1781e05df3b1SJaegeuk Kim struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); 1782e05df3b1SJaegeuk Kim struct f2fs_summary_block *sum = curseg->sum_blk; 1783e05df3b1SJaegeuk Kim struct list_head *cur, *n; 1784e05df3b1SJaegeuk Kim struct page *page = NULL; 1785e05df3b1SJaegeuk Kim struct f2fs_nat_block *nat_blk = NULL; 1786e05df3b1SJaegeuk Kim nid_t start_nid = 0, end_nid = 0; 1787e05df3b1SJaegeuk Kim bool flushed; 1788e05df3b1SJaegeuk Kim 1789e05df3b1SJaegeuk Kim flushed = flush_nats_in_journal(sbi); 1790e05df3b1SJaegeuk Kim 1791e05df3b1SJaegeuk Kim if (!flushed) 1792e05df3b1SJaegeuk Kim mutex_lock(&curseg->curseg_mutex); 1793e05df3b1SJaegeuk Kim 1794e05df3b1SJaegeuk Kim /* 1) flush dirty nat caches */ 1795e05df3b1SJaegeuk Kim list_for_each_safe(cur, n, &nm_i->dirty_nat_entries) { 1796e05df3b1SJaegeuk Kim struct nat_entry *ne; 1797e05df3b1SJaegeuk Kim nid_t nid; 1798e05df3b1SJaegeuk Kim struct f2fs_nat_entry raw_ne; 1799e05df3b1SJaegeuk Kim int offset = -1; 18002b50638dSJaegeuk Kim block_t new_blkaddr; 1801e05df3b1SJaegeuk Kim 1802e05df3b1SJaegeuk Kim ne = list_entry(cur, struct nat_entry, list); 1803e05df3b1SJaegeuk Kim nid = nat_get_nid(ne); 1804e05df3b1SJaegeuk Kim 1805e05df3b1SJaegeuk Kim if (nat_get_blkaddr(ne) == NEW_ADDR) 1806e05df3b1SJaegeuk Kim continue; 1807e05df3b1SJaegeuk Kim if (flushed) 1808e05df3b1SJaegeuk Kim goto to_nat_page; 1809e05df3b1SJaegeuk Kim 1810e05df3b1SJaegeuk Kim /* if there is room for nat enries in curseg->sumpage */ 1811e05df3b1SJaegeuk Kim offset = lookup_journal_in_cursum(sum, NAT_JOURNAL, nid, 1); 1812e05df3b1SJaegeuk Kim if (offset >= 0) { 1813e05df3b1SJaegeuk Kim raw_ne = nat_in_journal(sum, offset); 1814e05df3b1SJaegeuk Kim goto flush_now; 1815e05df3b1SJaegeuk Kim } 1816e05df3b1SJaegeuk Kim to_nat_page: 1817e05df3b1SJaegeuk Kim if (!page || (start_nid > nid || nid > end_nid)) { 1818e05df3b1SJaegeuk Kim if (page) { 1819e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 1820e05df3b1SJaegeuk Kim page = NULL; 1821e05df3b1SJaegeuk Kim } 1822e05df3b1SJaegeuk Kim start_nid = START_NID(nid); 1823e05df3b1SJaegeuk Kim end_nid = start_nid + NAT_ENTRY_PER_BLOCK - 1; 1824e05df3b1SJaegeuk Kim 1825e05df3b1SJaegeuk Kim /* 1826e05df3b1SJaegeuk Kim * get nat block with dirty flag, increased reference 1827e05df3b1SJaegeuk Kim * count, mapped and lock 1828e05df3b1SJaegeuk Kim */ 1829e05df3b1SJaegeuk Kim page = get_next_nat_page(sbi, start_nid); 1830e05df3b1SJaegeuk Kim nat_blk = page_address(page); 1831e05df3b1SJaegeuk Kim } 1832e05df3b1SJaegeuk Kim 18335d56b671SJaegeuk Kim f2fs_bug_on(!nat_blk); 1834e05df3b1SJaegeuk Kim raw_ne = nat_blk->entries[nid - start_nid]; 1835e05df3b1SJaegeuk Kim flush_now: 1836e05df3b1SJaegeuk Kim new_blkaddr = nat_get_blkaddr(ne); 1837e05df3b1SJaegeuk Kim 1838e05df3b1SJaegeuk Kim raw_ne.ino = cpu_to_le32(nat_get_ino(ne)); 1839e05df3b1SJaegeuk Kim raw_ne.block_addr = cpu_to_le32(new_blkaddr); 1840e05df3b1SJaegeuk Kim raw_ne.version = nat_get_version(ne); 1841e05df3b1SJaegeuk Kim 1842e05df3b1SJaegeuk Kim if (offset < 0) { 1843e05df3b1SJaegeuk Kim nat_blk->entries[nid - start_nid] = raw_ne; 1844e05df3b1SJaegeuk Kim } else { 1845e05df3b1SJaegeuk Kim nat_in_journal(sum, offset) = raw_ne; 1846e05df3b1SJaegeuk Kim nid_in_journal(sum, offset) = cpu_to_le32(nid); 1847e05df3b1SJaegeuk Kim } 1848e05df3b1SJaegeuk Kim 1849fa372417SJaegeuk Kim if (nat_get_blkaddr(ne) == NULL_ADDR && 185059bbd474SJaegeuk Kim add_free_nid(NM_I(sbi), nid, false) <= 0) { 1851e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 1852e05df3b1SJaegeuk Kim __del_from_nat_cache(nm_i, ne); 1853e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 1854e05df3b1SJaegeuk Kim } else { 1855e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 1856e05df3b1SJaegeuk Kim __clear_nat_cache_dirty(nm_i, ne); 1857e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 1858e05df3b1SJaegeuk Kim } 1859e05df3b1SJaegeuk Kim } 1860e05df3b1SJaegeuk Kim if (!flushed) 1861e05df3b1SJaegeuk Kim mutex_unlock(&curseg->curseg_mutex); 1862e05df3b1SJaegeuk Kim f2fs_put_page(page, 1); 1863e05df3b1SJaegeuk Kim } 1864e05df3b1SJaegeuk Kim 1865e05df3b1SJaegeuk Kim static int init_node_manager(struct f2fs_sb_info *sbi) 1866e05df3b1SJaegeuk Kim { 1867e05df3b1SJaegeuk Kim struct f2fs_super_block *sb_raw = F2FS_RAW_SUPER(sbi); 1868e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1869e05df3b1SJaegeuk Kim unsigned char *version_bitmap; 1870e05df3b1SJaegeuk Kim unsigned int nat_segs, nat_blocks; 1871e05df3b1SJaegeuk Kim 1872e05df3b1SJaegeuk Kim nm_i->nat_blkaddr = le32_to_cpu(sb_raw->nat_blkaddr); 1873e05df3b1SJaegeuk Kim 1874e05df3b1SJaegeuk Kim /* segment_count_nat includes pair segment so divide to 2. */ 1875e05df3b1SJaegeuk Kim nat_segs = le32_to_cpu(sb_raw->segment_count_nat) >> 1; 1876e05df3b1SJaegeuk Kim nat_blocks = nat_segs << le32_to_cpu(sb_raw->log_blocks_per_seg); 1877b63da15eSJaegeuk Kim 1878b63da15eSJaegeuk Kim /* not used nids: 0, node, meta, (and root counted as valid node) */ 1879b63da15eSJaegeuk Kim nm_i->max_nid = NAT_ENTRY_PER_BLOCK * nat_blocks - 3; 1880e05df3b1SJaegeuk Kim nm_i->fcnt = 0; 1881e05df3b1SJaegeuk Kim nm_i->nat_cnt = 0; 1882cdfc41c1SJaegeuk Kim nm_i->ram_thresh = DEF_RAM_THRESHOLD; 1883e05df3b1SJaegeuk Kim 18848a7ed66aSJaegeuk Kim INIT_RADIX_TREE(&nm_i->free_nid_root, GFP_ATOMIC); 1885e05df3b1SJaegeuk Kim INIT_LIST_HEAD(&nm_i->free_nid_list); 1886e05df3b1SJaegeuk Kim INIT_RADIX_TREE(&nm_i->nat_root, GFP_ATOMIC); 1887e05df3b1SJaegeuk Kim INIT_LIST_HEAD(&nm_i->nat_entries); 1888e05df3b1SJaegeuk Kim INIT_LIST_HEAD(&nm_i->dirty_nat_entries); 1889e05df3b1SJaegeuk Kim 1890e05df3b1SJaegeuk Kim mutex_init(&nm_i->build_lock); 1891e05df3b1SJaegeuk Kim spin_lock_init(&nm_i->free_nid_list_lock); 1892e05df3b1SJaegeuk Kim rwlock_init(&nm_i->nat_tree_lock); 1893e05df3b1SJaegeuk Kim 1894e05df3b1SJaegeuk Kim nm_i->next_scan_nid = le32_to_cpu(sbi->ckpt->next_free_nid); 189579b5793bSAlexandru Gheorghiu nm_i->bitmap_size = __bitmap_size(sbi, NAT_BITMAP); 1896e05df3b1SJaegeuk Kim version_bitmap = __bitmap_ptr(sbi, NAT_BITMAP); 1897e05df3b1SJaegeuk Kim if (!version_bitmap) 1898e05df3b1SJaegeuk Kim return -EFAULT; 1899e05df3b1SJaegeuk Kim 190079b5793bSAlexandru Gheorghiu nm_i->nat_bitmap = kmemdup(version_bitmap, nm_i->bitmap_size, 190179b5793bSAlexandru Gheorghiu GFP_KERNEL); 190279b5793bSAlexandru Gheorghiu if (!nm_i->nat_bitmap) 190379b5793bSAlexandru Gheorghiu return -ENOMEM; 1904e05df3b1SJaegeuk Kim return 0; 1905e05df3b1SJaegeuk Kim } 1906e05df3b1SJaegeuk Kim 1907e05df3b1SJaegeuk Kim int build_node_manager(struct f2fs_sb_info *sbi) 1908e05df3b1SJaegeuk Kim { 1909e05df3b1SJaegeuk Kim int err; 1910e05df3b1SJaegeuk Kim 1911e05df3b1SJaegeuk Kim sbi->nm_info = kzalloc(sizeof(struct f2fs_nm_info), GFP_KERNEL); 1912e05df3b1SJaegeuk Kim if (!sbi->nm_info) 1913e05df3b1SJaegeuk Kim return -ENOMEM; 1914e05df3b1SJaegeuk Kim 1915e05df3b1SJaegeuk Kim err = init_node_manager(sbi); 1916e05df3b1SJaegeuk Kim if (err) 1917e05df3b1SJaegeuk Kim return err; 1918e05df3b1SJaegeuk Kim 1919e05df3b1SJaegeuk Kim build_free_nids(sbi); 1920e05df3b1SJaegeuk Kim return 0; 1921e05df3b1SJaegeuk Kim } 1922e05df3b1SJaegeuk Kim 1923e05df3b1SJaegeuk Kim void destroy_node_manager(struct f2fs_sb_info *sbi) 1924e05df3b1SJaegeuk Kim { 1925e05df3b1SJaegeuk Kim struct f2fs_nm_info *nm_i = NM_I(sbi); 1926e05df3b1SJaegeuk Kim struct free_nid *i, *next_i; 1927e05df3b1SJaegeuk Kim struct nat_entry *natvec[NATVEC_SIZE]; 1928e05df3b1SJaegeuk Kim nid_t nid = 0; 1929e05df3b1SJaegeuk Kim unsigned int found; 1930e05df3b1SJaegeuk Kim 1931e05df3b1SJaegeuk Kim if (!nm_i) 1932e05df3b1SJaegeuk Kim return; 1933e05df3b1SJaegeuk Kim 1934e05df3b1SJaegeuk Kim /* destroy free nid list */ 1935e05df3b1SJaegeuk Kim spin_lock(&nm_i->free_nid_list_lock); 1936e05df3b1SJaegeuk Kim list_for_each_entry_safe(i, next_i, &nm_i->free_nid_list, list) { 19375d56b671SJaegeuk Kim f2fs_bug_on(i->state == NID_ALLOC); 19388a7ed66aSJaegeuk Kim __del_from_free_nid_list(nm_i, i); 1939e05df3b1SJaegeuk Kim nm_i->fcnt--; 1940cf0ee0f0SChao Yu spin_unlock(&nm_i->free_nid_list_lock); 1941cf0ee0f0SChao Yu kmem_cache_free(free_nid_slab, i); 1942cf0ee0f0SChao Yu spin_lock(&nm_i->free_nid_list_lock); 1943e05df3b1SJaegeuk Kim } 19445d56b671SJaegeuk Kim f2fs_bug_on(nm_i->fcnt); 1945e05df3b1SJaegeuk Kim spin_unlock(&nm_i->free_nid_list_lock); 1946e05df3b1SJaegeuk Kim 1947e05df3b1SJaegeuk Kim /* destroy nat cache */ 1948e05df3b1SJaegeuk Kim write_lock(&nm_i->nat_tree_lock); 1949e05df3b1SJaegeuk Kim while ((found = __gang_lookup_nat_cache(nm_i, 1950e05df3b1SJaegeuk Kim nid, NATVEC_SIZE, natvec))) { 1951e05df3b1SJaegeuk Kim unsigned idx; 1952b6ce391eSGu Zheng nid = nat_get_nid(natvec[found - 1]) + 1; 1953b6ce391eSGu Zheng for (idx = 0; idx < found; idx++) 1954b6ce391eSGu Zheng __del_from_nat_cache(nm_i, natvec[idx]); 1955e05df3b1SJaegeuk Kim } 19565d56b671SJaegeuk Kim f2fs_bug_on(nm_i->nat_cnt); 1957e05df3b1SJaegeuk Kim write_unlock(&nm_i->nat_tree_lock); 1958e05df3b1SJaegeuk Kim 1959e05df3b1SJaegeuk Kim kfree(nm_i->nat_bitmap); 1960e05df3b1SJaegeuk Kim sbi->nm_info = NULL; 1961e05df3b1SJaegeuk Kim kfree(nm_i); 1962e05df3b1SJaegeuk Kim } 1963e05df3b1SJaegeuk Kim 19646e6093a8SNamjae Jeon int __init create_node_manager_caches(void) 1965e05df3b1SJaegeuk Kim { 1966e05df3b1SJaegeuk Kim nat_entry_slab = f2fs_kmem_cache_create("nat_entry", 1967e8512d2eSGu Zheng sizeof(struct nat_entry)); 1968e05df3b1SJaegeuk Kim if (!nat_entry_slab) 1969e05df3b1SJaegeuk Kim return -ENOMEM; 1970e05df3b1SJaegeuk Kim 1971e05df3b1SJaegeuk Kim free_nid_slab = f2fs_kmem_cache_create("free_nid", 1972e8512d2eSGu Zheng sizeof(struct free_nid)); 1973e05df3b1SJaegeuk Kim if (!free_nid_slab) { 1974e05df3b1SJaegeuk Kim kmem_cache_destroy(nat_entry_slab); 1975e05df3b1SJaegeuk Kim return -ENOMEM; 1976e05df3b1SJaegeuk Kim } 1977e05df3b1SJaegeuk Kim return 0; 1978e05df3b1SJaegeuk Kim } 1979e05df3b1SJaegeuk Kim 1980e05df3b1SJaegeuk Kim void destroy_node_manager_caches(void) 1981e05df3b1SJaegeuk Kim { 1982e05df3b1SJaegeuk Kim kmem_cache_destroy(free_nid_slab); 1983e05df3b1SJaegeuk Kim kmem_cache_destroy(nat_entry_slab); 1984e05df3b1SJaegeuk Kim } 1985