4 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
5 * http://www.samsung.com/
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
12 #include <linux/f2fs_fs.h>
17 static struct kmem_cache *fsync_entry_slab;
19 bool space_for_roll_forward(struct f2fs_sb_info *sbi)
21 if (sbi->last_valid_block_count + sbi->alloc_valid_block_count
22 > sbi->user_block_count)
27 static struct fsync_inode_entry *get_fsync_inode(struct list_head *head,
30 struct list_head *this;
31 struct fsync_inode_entry *entry;
33 list_for_each(this, head) {
34 entry = list_entry(this, struct fsync_inode_entry, list);
35 if (entry->inode->i_ino == ino)
41 static int recover_dentry(struct page *ipage, struct inode *inode)
43 struct f2fs_node *raw_node = F2FS_NODE(ipage);
44 struct f2fs_inode *raw_inode = &(raw_node->i);
45 nid_t pino = le32_to_cpu(raw_inode->i_pino);
46 struct f2fs_dir_entry *de;
49 struct inode *dir, *einode;
52 dir = check_dirty_dir_inode(F2FS_SB(inode->i_sb), pino);
54 dir = f2fs_iget(inode->i_sb, pino);
59 set_inode_flag(F2FS_I(dir), FI_DELAY_IPUT);
60 add_dirty_dir_inode(dir);
63 name.len = le32_to_cpu(raw_inode->i_namelen);
64 name.name = raw_inode->i_name;
66 de = f2fs_find_entry(dir, &name, &page);
67 if (de && inode->i_ino == le32_to_cpu(de->ino))
70 einode = f2fs_iget(inode->i_sb, le32_to_cpu(de->ino));
73 if (PTR_ERR(einode) == -ENOENT)
77 err = acquire_orphan_inode(F2FS_SB(inode->i_sb));
82 f2fs_delete_entry(de, page, einode);
86 err = __f2fs_add_link(dir, &name, inode);
91 f2fs_put_page(page, 0);
93 f2fs_msg(inode->i_sb, KERN_NOTICE, "recover_inode and its dentry: "
94 "ino = %x, name = %s, dir = %lx, err = %d",
95 ino_of_node(ipage), raw_inode->i_name,
96 IS_ERR(dir) ? 0 : dir->i_ino, err);
100 static int recover_inode(struct inode *inode, struct page *node_page)
102 struct f2fs_node *raw_node = F2FS_NODE(node_page);
103 struct f2fs_inode *raw_inode = &(raw_node->i);
105 if (!IS_INODE(node_page))
108 inode->i_mode = le16_to_cpu(raw_inode->i_mode);
109 i_size_write(inode, le64_to_cpu(raw_inode->i_size));
110 inode->i_atime.tv_sec = le64_to_cpu(raw_inode->i_mtime);
111 inode->i_ctime.tv_sec = le64_to_cpu(raw_inode->i_ctime);
112 inode->i_mtime.tv_sec = le64_to_cpu(raw_inode->i_mtime);
113 inode->i_atime.tv_nsec = le32_to_cpu(raw_inode->i_mtime_nsec);
114 inode->i_ctime.tv_nsec = le32_to_cpu(raw_inode->i_ctime_nsec);
115 inode->i_mtime.tv_nsec = le32_to_cpu(raw_inode->i_mtime_nsec);
117 if (is_dent_dnode(node_page))
118 return recover_dentry(node_page, inode);
120 f2fs_msg(inode->i_sb, KERN_NOTICE, "recover_inode: ino = %x, name = %s",
121 ino_of_node(node_page), raw_inode->i_name);
125 static int find_fsync_dnodes(struct f2fs_sb_info *sbi, struct list_head *head)
127 unsigned long long cp_ver = cur_cp_version(F2FS_CKPT(sbi));
128 struct curseg_info *curseg;
133 /* get node pages in the current segment */
134 curseg = CURSEG_I(sbi, CURSEG_WARM_NODE);
135 blkaddr = START_BLOCK(sbi, curseg->segno) + curseg->next_blkoff;
138 page = alloc_page(GFP_F2FS_ZERO);
144 struct fsync_inode_entry *entry;
146 err = f2fs_readpage(sbi, page, blkaddr, READ_SYNC);
152 if (cp_ver != cpver_of_node(page))
155 if (!is_fsync_dnode(page))
158 entry = get_fsync_inode(head, ino_of_node(page));
160 if (IS_INODE(page) && is_dent_dnode(page))
161 set_inode_flag(F2FS_I(entry->inode),
164 if (IS_INODE(page) && is_dent_dnode(page)) {
165 err = recover_inode_page(sbi, page);
170 /* add this fsync inode to the list */
171 entry = kmem_cache_alloc(fsync_entry_slab, GFP_NOFS);
177 entry->inode = f2fs_iget(sbi->sb, ino_of_node(page));
178 if (IS_ERR(entry->inode)) {
179 err = PTR_ERR(entry->inode);
180 kmem_cache_free(fsync_entry_slab, entry);
183 list_add_tail(&entry->list, head);
185 entry->blkaddr = blkaddr;
187 err = recover_inode(entry->inode, page);
188 if (err && err != -ENOENT)
191 /* check next segment */
192 blkaddr = next_blkaddr_of_node(page);
196 __free_pages(page, 0);
200 static void destroy_fsync_dnodes(struct list_head *head)
202 struct fsync_inode_entry *entry, *tmp;
204 list_for_each_entry_safe(entry, tmp, head, list) {
206 list_del(&entry->list);
207 kmem_cache_free(fsync_entry_slab, entry);
211 static int check_index_in_prev_nodes(struct f2fs_sb_info *sbi,
212 block_t blkaddr, struct dnode_of_data *dn)
214 struct seg_entry *sentry;
215 unsigned int segno = GET_SEGNO(sbi, blkaddr);
216 unsigned short blkoff = GET_SEGOFF_FROM_SEG0(sbi, blkaddr) &
217 (sbi->blocks_per_seg - 1);
218 struct f2fs_summary sum;
222 struct page *node_page;
227 sentry = get_seg_entry(sbi, segno);
228 if (!f2fs_test_bit(blkoff, sentry->cur_valid_map))
231 /* Get the previous summary */
232 for (i = CURSEG_WARM_DATA; i <= CURSEG_COLD_DATA; i++) {
233 struct curseg_info *curseg = CURSEG_I(sbi, i);
234 if (curseg->segno == segno) {
235 sum = curseg->sum_blk->entries[blkoff];
239 if (i > CURSEG_COLD_DATA) {
240 struct page *sum_page = get_sum_page(sbi, segno);
241 struct f2fs_summary_block *sum_node;
242 kaddr = page_address(sum_page);
243 sum_node = (struct f2fs_summary_block *)kaddr;
244 sum = sum_node->entries[blkoff];
245 f2fs_put_page(sum_page, 1);
248 /* Use the locked dnode page and inode */
249 nid = le32_to_cpu(sum.nid);
250 if (dn->inode->i_ino == nid) {
251 struct dnode_of_data tdn = *dn;
253 tdn.node_page = dn->inode_page;
254 tdn.ofs_in_node = le16_to_cpu(sum.ofs_in_node);
255 truncate_data_blocks_range(&tdn, 1);
257 } else if (dn->nid == nid) {
258 struct dnode_of_data tdn = *dn;
259 tdn.ofs_in_node = le16_to_cpu(sum.ofs_in_node);
260 truncate_data_blocks_range(&tdn, 1);
264 /* Get the node page */
265 node_page = get_node_page(sbi, nid);
266 if (IS_ERR(node_page))
267 return PTR_ERR(node_page);
269 offset = ofs_of_node(node_page);
270 ino = ino_of_node(node_page);
271 f2fs_put_page(node_page, 1);
273 /* Deallocate previous index in the node page */
274 inode = f2fs_iget(sbi->sb, ino);
276 return PTR_ERR(inode);
278 bidx = start_bidx_of_node(offset, F2FS_I(inode)) +
279 le16_to_cpu(sum.ofs_in_node);
281 truncate_hole(inode, bidx, bidx + 1);
286 static int do_recover_data(struct f2fs_sb_info *sbi, struct inode *inode,
287 struct page *page, block_t blkaddr)
289 struct f2fs_inode_info *fi = F2FS_I(inode);
290 unsigned int start, end;
291 struct dnode_of_data dn;
292 struct f2fs_summary sum;
294 int err = 0, recovered = 0;
296 start = start_bidx_of_node(ofs_of_node(page), fi);
298 end = start + ADDRS_PER_INODE(fi);
300 end = start + ADDRS_PER_BLOCK;
303 set_new_dnode(&dn, inode, NULL, NULL, 0);
305 err = get_dnode_of_data(&dn, start, ALLOC_NODE);
311 wait_on_page_writeback(dn.node_page);
313 get_node_info(sbi, dn.nid, &ni);
314 BUG_ON(ni.ino != ino_of_node(page));
315 BUG_ON(ofs_of_node(dn.node_page) != ofs_of_node(page));
317 for (; start < end; start++) {
320 src = datablock_addr(dn.node_page, dn.ofs_in_node);
321 dest = datablock_addr(page, dn.ofs_in_node);
323 if (src != dest && dest != NEW_ADDR && dest != NULL_ADDR) {
324 if (src == NULL_ADDR) {
325 int err = reserve_new_block(&dn);
326 /* We should not get -ENOSPC */
330 /* Check the previous node page having this index */
331 err = check_index_in_prev_nodes(sbi, dest, &dn);
335 set_summary(&sum, dn.nid, dn.ofs_in_node, ni.version);
337 /* write dummy data page */
338 recover_data_page(sbi, NULL, &sum, src, dest);
339 update_extent_cache(dest, &dn);
345 /* write node page in place */
346 set_summary(&sum, dn.nid, 0, 0);
347 if (IS_INODE(dn.node_page))
348 sync_inode_page(&dn);
350 copy_node_footer(dn.node_page, page);
351 fill_node_footer(dn.node_page, dn.nid, ni.ino,
352 ofs_of_node(page), false);
353 set_page_dirty(dn.node_page);
355 recover_node_page(sbi, dn.node_page, &sum, &ni, blkaddr);
360 f2fs_msg(sbi->sb, KERN_NOTICE, "recover_data: ino = %lx, "
361 "recovered_data = %d blocks, err = %d",
362 inode->i_ino, recovered, err);
366 static int recover_data(struct f2fs_sb_info *sbi,
367 struct list_head *head, int type)
369 unsigned long long cp_ver = cur_cp_version(F2FS_CKPT(sbi));
370 struct curseg_info *curseg;
375 /* get node pages in the current segment */
376 curseg = CURSEG_I(sbi, type);
377 blkaddr = NEXT_FREE_BLKADDR(sbi, curseg);
380 page = alloc_page(GFP_NOFS | __GFP_ZERO);
387 struct fsync_inode_entry *entry;
389 err = f2fs_readpage(sbi, page, blkaddr, READ_SYNC);
395 if (cp_ver != cpver_of_node(page))
398 entry = get_fsync_inode(head, ino_of_node(page));
402 err = do_recover_data(sbi, entry->inode, page, blkaddr);
406 if (entry->blkaddr == blkaddr) {
408 list_del(&entry->list);
409 kmem_cache_free(fsync_entry_slab, entry);
412 /* check next segment */
413 blkaddr = next_blkaddr_of_node(page);
417 __free_pages(page, 0);
420 allocate_new_segments(sbi);
424 int recover_fsync_data(struct f2fs_sb_info *sbi)
426 struct list_head inode_list;
428 int need_writecp = 0;
430 fsync_entry_slab = f2fs_kmem_cache_create("f2fs_fsync_inode_entry",
431 sizeof(struct fsync_inode_entry), NULL);
432 if (unlikely(!fsync_entry_slab))
435 INIT_LIST_HEAD(&inode_list);
437 /* step #1: find fsynced inode numbers */
439 err = find_fsync_dnodes(sbi, &inode_list);
443 if (list_empty(&inode_list))
448 /* step #2: recover data */
449 err = recover_data(sbi, &inode_list, CURSEG_WARM_NODE);
450 BUG_ON(!list_empty(&inode_list));
452 destroy_fsync_dnodes(&inode_list);
453 kmem_cache_destroy(fsync_entry_slab);
455 if (!err && need_writecp)
456 write_checkpoint(sbi, false);