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git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - fs/f2fs/recovery.c
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 err
= f2fs_readpage(sbi
, page
, blkaddr
, READ_SYNC
);
121 if (cp_ver
!= cpver_of_node(page
))
124 if (!is_fsync_dnode(page
))
127 entry
= get_fsync_inode(head
, ino_of_node(page
));
129 entry
->blkaddr
= blkaddr
;
130 if (IS_INODE(page
) && is_dent_dnode(page
))
131 set_inode_flag(F2FS_I(entry
->inode
),
134 if (IS_INODE(page
) && is_dent_dnode(page
)) {
135 err
= recover_inode_page(sbi
, page
);
140 /* add this fsync inode to the list */
141 entry
= kmem_cache_alloc(fsync_entry_slab
, GFP_NOFS
);
147 entry
->inode
= f2fs_iget(sbi
->sb
, ino_of_node(page
));
148 if (IS_ERR(entry
->inode
)) {
149 err
= PTR_ERR(entry
->inode
);
150 kmem_cache_free(fsync_entry_slab
, entry
);
154 list_add_tail(&entry
->list
, head
);
155 entry
->blkaddr
= blkaddr
;
157 if (IS_INODE(page
)) {
158 err
= recover_inode(entry
->inode
, page
);
163 /* check next segment */
164 blkaddr
= next_blkaddr_of_node(page
);
169 __free_pages(page
, 0);
173 static void destroy_fsync_dnodes(struct f2fs_sb_info
*sbi
,
174 struct list_head
*head
)
176 struct fsync_inode_entry
*entry
, *tmp
;
178 list_for_each_entry_safe(entry
, tmp
, head
, list
) {
180 list_del(&entry
->list
);
181 kmem_cache_free(fsync_entry_slab
, entry
);
185 static void check_index_in_prev_nodes(struct f2fs_sb_info
*sbi
,
188 struct seg_entry
*sentry
;
189 unsigned int segno
= GET_SEGNO(sbi
, blkaddr
);
190 unsigned short blkoff
= GET_SEGOFF_FROM_SEG0(sbi
, blkaddr
) &
191 (sbi
->blocks_per_seg
- 1);
192 struct f2fs_summary sum
;
196 struct page
*node_page
;
200 sentry
= get_seg_entry(sbi
, segno
);
201 if (!f2fs_test_bit(blkoff
, sentry
->cur_valid_map
))
204 /* Get the previous summary */
205 for (i
= CURSEG_WARM_DATA
; i
<= CURSEG_COLD_DATA
; i
++) {
206 struct curseg_info
*curseg
= CURSEG_I(sbi
, i
);
207 if (curseg
->segno
== segno
) {
208 sum
= curseg
->sum_blk
->entries
[blkoff
];
212 if (i
> CURSEG_COLD_DATA
) {
213 struct page
*sum_page
= get_sum_page(sbi
, segno
);
214 struct f2fs_summary_block
*sum_node
;
215 kaddr
= page_address(sum_page
);
216 sum_node
= (struct f2fs_summary_block
*)kaddr
;
217 sum
= sum_node
->entries
[blkoff
];
218 f2fs_put_page(sum_page
, 1);
221 /* Get the node page */
222 node_page
= get_node_page(sbi
, le32_to_cpu(sum
.nid
));
223 bidx
= start_bidx_of_node(ofs_of_node(node_page
)) +
224 le16_to_cpu(sum
.ofs_in_node
);
225 ino
= ino_of_node(node_page
);
226 f2fs_put_page(node_page
, 1);
228 /* Deallocate previous index in the node page */
229 inode
= f2fs_iget(sbi
->sb
, ino
);
233 truncate_hole(inode
, bidx
, bidx
+ 1);
237 static int do_recover_data(struct f2fs_sb_info
*sbi
, struct inode
*inode
,
238 struct page
*page
, block_t blkaddr
)
240 unsigned int start
, end
;
241 struct dnode_of_data dn
;
242 struct f2fs_summary sum
;
247 start
= start_bidx_of_node(ofs_of_node(page
));
249 end
= start
+ ADDRS_PER_INODE
;
251 end
= start
+ ADDRS_PER_BLOCK
;
253 ilock
= mutex_lock_op(sbi
);
254 set_new_dnode(&dn
, inode
, NULL
, NULL
, 0);
256 err
= get_dnode_of_data(&dn
, start
, ALLOC_NODE
);
258 mutex_unlock_op(sbi
, ilock
);
262 wait_on_page_writeback(dn
.node_page
);
264 get_node_info(sbi
, dn
.nid
, &ni
);
265 BUG_ON(ni
.ino
!= ino_of_node(page
));
266 BUG_ON(ofs_of_node(dn
.node_page
) != ofs_of_node(page
));
268 for (; start
< end
; start
++) {
271 src
= datablock_addr(dn
.node_page
, dn
.ofs_in_node
);
272 dest
= datablock_addr(page
, dn
.ofs_in_node
);
274 if (src
!= dest
&& dest
!= NEW_ADDR
&& dest
!= NULL_ADDR
) {
275 if (src
== NULL_ADDR
) {
276 int err
= reserve_new_block(&dn
);
277 /* We should not get -ENOSPC */
281 /* Check the previous node page having this index */
282 check_index_in_prev_nodes(sbi
, dest
);
284 set_summary(&sum
, dn
.nid
, dn
.ofs_in_node
, ni
.version
);
286 /* write dummy data page */
287 recover_data_page(sbi
, NULL
, &sum
, src
, dest
);
288 update_extent_cache(dest
, &dn
);
293 /* write node page in place */
294 set_summary(&sum
, dn
.nid
, 0, 0);
295 if (IS_INODE(dn
.node_page
))
296 sync_inode_page(&dn
);
298 copy_node_footer(dn
.node_page
, page
);
299 fill_node_footer(dn
.node_page
, dn
.nid
, ni
.ino
,
300 ofs_of_node(page
), false);
301 set_page_dirty(dn
.node_page
);
303 recover_node_page(sbi
, dn
.node_page
, &sum
, &ni
, blkaddr
);
305 mutex_unlock_op(sbi
, ilock
);
309 static int recover_data(struct f2fs_sb_info
*sbi
,
310 struct list_head
*head
, int type
)
312 unsigned long long cp_ver
= le64_to_cpu(sbi
->ckpt
->checkpoint_ver
);
313 struct curseg_info
*curseg
;
318 /* get node pages in the current segment */
319 curseg
= CURSEG_I(sbi
, type
);
320 blkaddr
= NEXT_FREE_BLKADDR(sbi
, curseg
);
323 page
= alloc_page(GFP_NOFS
| __GFP_ZERO
);
330 struct fsync_inode_entry
*entry
;
332 err
= f2fs_readpage(sbi
, page
, blkaddr
, READ_SYNC
);
338 if (cp_ver
!= cpver_of_node(page
))
341 entry
= get_fsync_inode(head
, ino_of_node(page
));
345 err
= do_recover_data(sbi
, entry
->inode
, page
, blkaddr
);
349 if (entry
->blkaddr
== blkaddr
) {
351 list_del(&entry
->list
);
352 kmem_cache_free(fsync_entry_slab
, entry
);
355 /* check next segment */
356 blkaddr
= next_blkaddr_of_node(page
);
361 __free_pages(page
, 0);
364 allocate_new_segments(sbi
);
368 int recover_fsync_data(struct f2fs_sb_info
*sbi
)
370 struct list_head inode_list
;
373 fsync_entry_slab
= f2fs_kmem_cache_create("f2fs_fsync_inode_entry",
374 sizeof(struct fsync_inode_entry
), NULL
);
375 if (unlikely(!fsync_entry_slab
))
378 INIT_LIST_HEAD(&inode_list
);
380 /* step #1: find fsynced inode numbers */
381 err
= find_fsync_dnodes(sbi
, &inode_list
);
385 if (list_empty(&inode_list
))
388 /* step #2: recover data */
390 err
= recover_data(sbi
, &inode_list
, CURSEG_WARM_NODE
);
392 BUG_ON(!list_empty(&inode_list
));
394 destroy_fsync_dnodes(sbi
, &inode_list
);
395 kmem_cache_destroy(fsync_entry_slab
);
396 write_checkpoint(sbi
, false);