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f2fs: fix the recovery flow to handle errors correctly 

We should handle errors during the recovery flow correctly.
For example, if we get -ENOMEM, we should report a mount failure instead of
conducting the remained mount procedure.

Reviewed-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
This commit is contained in:
Jaegeuk Kim 2013-03-20 19:01:06 +09:00
parent 111d2495a8
commit 6ead114232
3 changed files with 36 additions and 21 deletions
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2
fs/f2fs/f2fs.h
View File

@ -1027,7 +1027,7 @@ void destroy_gc_caches(void);
/*
* recovery.c
*/
void recover_fsync_data(struct f2fs_sb_info *);
int recover_fsync_data(struct f2fs_sb_info *);
bool space_for_roll_forward(struct f2fs_sb_info *);
/*

46
fs/f2fs/recovery.c
View File

@ -118,10 +118,8 @@ static int find_fsync_dnodes(struct f2fs_sb_info *sbi, struct list_head *head)
lock_page(page);
if (cp_ver != cpver_of_node(page)) {
err = -EINVAL;
if (cp_ver != cpver_of_node(page))
goto unlock_out;
}
if (!is_fsync_dnode(page))
goto next;
@ -134,10 +132,9 @@ static int find_fsync_dnodes(struct f2fs_sb_info *sbi, struct list_head *head)
FI_INC_LINK);
} else {
if (IS_INODE(page) && is_dent_dnode(page)) {
if (recover_inode_page(sbi, page)) {
err = -ENOMEM;
err = recover_inode_page(sbi, page);
if (err)
goto unlock_out;
}
}
/* add this fsync inode to the list */
@ -237,13 +234,14 @@ static void check_index_in_prev_nodes(struct f2fs_sb_info *sbi,
iput(inode);
}
static void do_recover_data(struct f2fs_sb_info *sbi, struct inode *inode,
static int do_recover_data(struct f2fs_sb_info *sbi, struct inode *inode,
struct page *page, block_t blkaddr)
{
unsigned int start, end;
struct dnode_of_data dn;
struct f2fs_summary sum;
struct node_info ni;
int err = 0;
start = start_bidx_of_node(ofs_of_node(page));
if (IS_INODE(page))
@ -252,8 +250,9 @@ static void do_recover_data(struct f2fs_sb_info *sbi, struct inode *inode,
end = start + ADDRS_PER_BLOCK;
set_new_dnode(&dn, inode, NULL, NULL, 0);
if (get_dnode_of_data(&dn, start, ALLOC_NODE))
return;
err = get_dnode_of_data(&dn, start, ALLOC_NODE);
if (err)
return err;
wait_on_page_writeback(dn.node_page);
@ -298,14 +297,16 @@ static void do_recover_data(struct f2fs_sb_info *sbi, struct inode *inode,
recover_node_page(sbi, dn.node_page, &sum, &ni, blkaddr);
f2fs_put_dnode(&dn);
return 0;
}
static void recover_data(struct f2fs_sb_info *sbi,
static int recover_data(struct f2fs_sb_info *sbi,
struct list_head *head, int type)
{
unsigned long long cp_ver = le64_to_cpu(sbi->ckpt->checkpoint_ver);
struct curseg_info *curseg;
struct page *page;
int err = 0;
block_t blkaddr;
/* get node pages in the current segment */
@ -315,13 +316,15 @@ static void recover_data(struct f2fs_sb_info *sbi,
/* read node page */
page = alloc_page(GFP_NOFS | __GFP_ZERO);
if (IS_ERR(page))
return;
return -ENOMEM;
lock_page(page);
while (1) {
struct fsync_inode_entry *entry;
if (f2fs_readpage(sbi, page, blkaddr, READ_SYNC))
err = f2fs_readpage(sbi, page, blkaddr, READ_SYNC);
if (err)
goto out;
lock_page(page);
@ -333,7 +336,9 @@ static void recover_data(struct f2fs_sb_info *sbi,
if (!entry)
goto next;
do_recover_data(sbi, entry->inode, page, blkaddr);
err = do_recover_data(sbi, entry->inode, page, blkaddr);
if (err)
goto out;
if (entry->blkaddr == blkaddr) {
iput(entry->inode);
@ -349,22 +354,26 @@ unlock_out:
out:
__free_pages(page, 0);
allocate_new_segments(sbi);
if (!err)
allocate_new_segments(sbi);
return err;
}
void recover_fsync_data(struct f2fs_sb_info *sbi)
int recover_fsync_data(struct f2fs_sb_info *sbi)
{
struct list_head inode_list;
int err;
fsync_entry_slab = f2fs_kmem_cache_create("f2fs_fsync_inode_entry",
sizeof(struct fsync_inode_entry), NULL);
if (unlikely(!fsync_entry_slab))
return;
return -ENOMEM;
INIT_LIST_HEAD(&inode_list);
/* step #1: find fsynced inode numbers */
if (find_fsync_dnodes(sbi, &inode_list))
err = find_fsync_dnodes(sbi, &inode_list);
if (err)
goto out;
if (list_empty(&inode_list))
@ -372,11 +381,12 @@ void recover_fsync_data(struct f2fs_sb_info *sbi)
/* step #2: recover data */
sbi->por_doing = 1;
recover_data(sbi, &inode_list, CURSEG_WARM_NODE);
err = recover_data(sbi, &inode_list, CURSEG_WARM_NODE);
sbi->por_doing = 0;
BUG_ON(!list_empty(&inode_list));
out:
destroy_fsync_dnodes(sbi, &inode_list);
kmem_cache_destroy(fsync_entry_slab);
write_checkpoint(sbi, false);
return err;
}

9
fs/f2fs/super.c
View File

@ -642,8 +642,13 @@ static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
}
/* recover fsynced data */
if (!test_opt(sbi, DISABLE_ROLL_FORWARD))
recover_fsync_data(sbi);
if (!test_opt(sbi, DISABLE_ROLL_FORWARD)) {
err = recover_fsync_data(sbi);
if (err) {
f2fs_msg(sb, KERN_ERR, "Failed to recover fsync data");
goto free_root_inode;
}
}
/* After POR, we can run background GC thread */
err = start_gc_thread(sbi);