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 = (struct f2fs_node *)kmap(ipage);
44 struct f2fs_inode *raw_inode = &(raw_node->i);
46 struct f2fs_dir_entry *de;
51 if (!is_dent_dnode(ipage))
54 dir = f2fs_iget(inode->i_sb, le32_to_cpu(raw_inode->i_pino));
60 name.len = le32_to_cpu(raw_inode->i_namelen);
61 name.name = raw_inode->i_name;
63 de = f2fs_find_entry(dir, &name, &page);
66 f2fs_put_page(page, 0);
68 err = __f2fs_add_link(dir, &name, inode);
76 static int recover_inode(struct inode *inode, struct page *node_page)
78 void *kaddr = page_address(node_page);
79 struct f2fs_node *raw_node = (struct f2fs_node *)kaddr;
80 struct f2fs_inode *raw_inode = &(raw_node->i);
82 inode->i_mode = le16_to_cpu(raw_inode->i_mode);
83 i_size_write(inode, le64_to_cpu(raw_inode->i_size));
84 inode->i_atime.tv_sec = le64_to_cpu(raw_inode->i_mtime);
85 inode->i_ctime.tv_sec = le64_to_cpu(raw_inode->i_ctime);
86 inode->i_mtime.tv_sec = le64_to_cpu(raw_inode->i_mtime);
87 inode->i_atime.tv_nsec = le32_to_cpu(raw_inode->i_mtime_nsec);
88 inode->i_ctime.tv_nsec = le32_to_cpu(raw_inode->i_ctime_nsec);
89 inode->i_mtime.tv_nsec = le32_to_cpu(raw_inode->i_mtime_nsec);
91 return recover_dentry(node_page, inode);
94 static int find_fsync_dnodes(struct f2fs_sb_info *sbi, struct list_head *head)
96 unsigned long long cp_ver = le64_to_cpu(sbi->ckpt->checkpoint_ver);
97 struct curseg_info *curseg;
102 /* get node pages in the current segment */
103 curseg = CURSEG_I(sbi, CURSEG_WARM_NODE);
104 blkaddr = START_BLOCK(sbi, curseg->segno) + curseg->next_blkoff;
107 page = alloc_page(GFP_F2FS_ZERO);
109 return PTR_ERR(page);
113 struct fsync_inode_entry *entry;
115 if (f2fs_readpage(sbi, page, blkaddr, READ_SYNC))
118 if (cp_ver != cpver_of_node(page))
121 if (!is_fsync_dnode(page))
124 entry = get_fsync_inode(head, ino_of_node(page));
126 entry->blkaddr = blkaddr;
127 if (IS_INODE(page) && is_dent_dnode(page))
128 set_inode_flag(F2FS_I(entry->inode),
131 if (IS_INODE(page) && is_dent_dnode(page)) {
132 if (recover_inode_page(sbi, page)) {
138 /* add this fsync inode to the list */
139 entry = kmem_cache_alloc(fsync_entry_slab, GFP_NOFS);
145 entry->inode = f2fs_iget(sbi->sb, ino_of_node(page));
146 if (IS_ERR(entry->inode)) {
147 err = PTR_ERR(entry->inode);
148 kmem_cache_free(fsync_entry_slab, entry);
152 list_add_tail(&entry->list, head);
153 entry->blkaddr = blkaddr;
155 if (IS_INODE(page)) {
156 err = recover_inode(entry->inode, page);
161 /* check next segment */
162 blkaddr = next_blkaddr_of_node(page);
163 ClearPageUptodate(page);
167 __free_pages(page, 0);
171 static void destroy_fsync_dnodes(struct f2fs_sb_info *sbi,
172 struct list_head *head)
174 struct fsync_inode_entry *entry, *tmp;
176 list_for_each_entry_safe(entry, tmp, head, list) {
178 list_del(&entry->list);
179 kmem_cache_free(fsync_entry_slab, entry);
183 static void check_index_in_prev_nodes(struct f2fs_sb_info *sbi,
186 struct seg_entry *sentry;
187 unsigned int segno = GET_SEGNO(sbi, blkaddr);
188 unsigned short blkoff = GET_SEGOFF_FROM_SEG0(sbi, blkaddr) &
189 (sbi->blocks_per_seg - 1);
190 struct f2fs_summary sum;
194 struct page *node_page;
198 sentry = get_seg_entry(sbi, segno);
199 if (!f2fs_test_bit(blkoff, sentry->cur_valid_map))
202 /* Get the previous summary */
203 for (i = CURSEG_WARM_DATA; i <= CURSEG_COLD_DATA; i++) {
204 struct curseg_info *curseg = CURSEG_I(sbi, i);
205 if (curseg->segno == segno) {
206 sum = curseg->sum_blk->entries[blkoff];
210 if (i > CURSEG_COLD_DATA) {
211 struct page *sum_page = get_sum_page(sbi, segno);
212 struct f2fs_summary_block *sum_node;
213 kaddr = page_address(sum_page);
214 sum_node = (struct f2fs_summary_block *)kaddr;
215 sum = sum_node->entries[blkoff];
216 f2fs_put_page(sum_page, 1);
219 /* Get the node page */
220 node_page = get_node_page(sbi, le32_to_cpu(sum.nid));
221 bidx = start_bidx_of_node(ofs_of_node(node_page)) +
222 le16_to_cpu(sum.ofs_in_node);
223 ino = ino_of_node(node_page);
224 f2fs_put_page(node_page, 1);
226 /* Deallocate previous index in the node page */
227 inode = f2fs_iget(sbi->sb, ino);
231 truncate_hole(inode, bidx, bidx + 1);
235 static void do_recover_data(struct f2fs_sb_info *sbi, struct inode *inode,
236 struct page *page, block_t blkaddr)
238 unsigned int start, end;
239 struct dnode_of_data dn;
240 struct f2fs_summary sum;
243 start = start_bidx_of_node(ofs_of_node(page));
245 end = start + ADDRS_PER_INODE;
247 end = start + ADDRS_PER_BLOCK;
249 set_new_dnode(&dn, inode, NULL, NULL, 0);
250 if (get_dnode_of_data(&dn, start, 0))
253 wait_on_page_writeback(dn.node_page);
255 get_node_info(sbi, dn.nid, &ni);
256 BUG_ON(ni.ino != ino_of_node(page));
257 BUG_ON(ofs_of_node(dn.node_page) != ofs_of_node(page));
259 for (; start < end; start++) {
262 src = datablock_addr(dn.node_page, dn.ofs_in_node);
263 dest = datablock_addr(page, dn.ofs_in_node);
265 if (src != dest && dest != NEW_ADDR && dest != NULL_ADDR) {
266 if (src == NULL_ADDR) {
267 int err = reserve_new_block(&dn);
268 /* We should not get -ENOSPC */
272 /* Check the previous node page having this index */
273 check_index_in_prev_nodes(sbi, dest);
275 set_summary(&sum, dn.nid, dn.ofs_in_node, ni.version);
277 /* write dummy data page */
278 recover_data_page(sbi, NULL, &sum, src, dest);
279 update_extent_cache(dest, &dn);
284 /* write node page in place */
285 set_summary(&sum, dn.nid, 0, 0);
286 if (IS_INODE(dn.node_page))
287 sync_inode_page(&dn);
289 copy_node_footer(dn.node_page, page);
290 fill_node_footer(dn.node_page, dn.nid, ni.ino,
291 ofs_of_node(page), false);
292 set_page_dirty(dn.node_page);
294 recover_node_page(sbi, dn.node_page, &sum, &ni, blkaddr);
298 static void recover_data(struct f2fs_sb_info *sbi,
299 struct list_head *head, int type)
301 unsigned long long cp_ver = le64_to_cpu(sbi->ckpt->checkpoint_ver);
302 struct curseg_info *curseg;
306 /* get node pages in the current segment */
307 curseg = CURSEG_I(sbi, type);
308 blkaddr = NEXT_FREE_BLKADDR(sbi, curseg);
311 page = alloc_page(GFP_NOFS | __GFP_ZERO);
317 struct fsync_inode_entry *entry;
319 if (f2fs_readpage(sbi, page, blkaddr, READ_SYNC))
322 if (cp_ver != cpver_of_node(page))
325 entry = get_fsync_inode(head, ino_of_node(page));
329 do_recover_data(sbi, entry->inode, page, blkaddr);
331 if (entry->blkaddr == blkaddr) {
333 list_del(&entry->list);
334 kmem_cache_free(fsync_entry_slab, entry);
337 /* check next segment */
338 blkaddr = next_blkaddr_of_node(page);
339 ClearPageUptodate(page);
343 __free_pages(page, 0);
345 allocate_new_segments(sbi);
348 void recover_fsync_data(struct f2fs_sb_info *sbi)
350 struct list_head inode_list;
352 fsync_entry_slab = f2fs_kmem_cache_create("f2fs_fsync_inode_entry",
353 sizeof(struct fsync_inode_entry), NULL);
354 if (unlikely(!fsync_entry_slab))
357 INIT_LIST_HEAD(&inode_list);
359 /* step #1: find fsynced inode numbers */
360 if (find_fsync_dnodes(sbi, &inode_list))
363 if (list_empty(&inode_list))
366 /* step #2: recover data */
368 recover_data(sbi, &inode_list, CURSEG_WARM_NODE);
370 BUG_ON(!list_empty(&inode_list));
372 destroy_fsync_dnodes(sbi, &inode_list);
373 kmem_cache_destroy(fsync_entry_slab);
374 write_checkpoint(sbi, false);