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f2fs: invalidate the node page if allocation is failed 

The new_node_page() is processed as the following procedure.

1. A new node page is allocated.
2. Set PageUptodate with proper footer information.
3. Check if there is a free space for allocation
 4.a. If there is no space, f2fs returns with -ENOSPC.
 4.b. Otherwise, go next.

In the case of step #4.a, f2fs remains a wrong node page in the page cache
with the uptodate flag.

Also, even though a new node page is allocated successfully, an error can be
occurred afterwards due to allocation failure of the other data structures.
In such a case, remove_inode_page() would be triggered, so that we have to
clear uptodate flag in truncate_node() too.

So, we should remove the uptodate flag, if allocation is failed.

Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
This commit is contained in:
Jaegeuk Kim 2012-12-20 15:10:06 +09:00
parent 690e4a3ead
commit 71e9fec548
1 changed files with 12 additions and 17 deletions
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29
fs/f2fs/node.c
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@ -484,12 +484,14 @@ static void truncate_node(struct dnode_of_data *dn)
struct node_info ni;
get_node_info(sbi, dn->nid, &ni);
if (dn->inode->i_blocks == 0) {
BUG_ON(ni.blk_addr != NULL_ADDR);
goto invalidate;
}
BUG_ON(ni.blk_addr == NULL_ADDR);
if (ni.blk_addr != NULL_ADDR)
invalidate_blocks(sbi, ni.blk_addr);
/* Deallocate node address */
invalidate_blocks(sbi, ni.blk_addr);
dec_valid_node_count(sbi, dn->inode, 1);
set_node_addr(sbi, &ni, NULL_ADDR);
@ -499,7 +501,7 @@ static void truncate_node(struct dnode_of_data *dn)
} else {
sync_inode_page(dn);
}
invalidate:
clear_node_page_dirty(dn->node_page);
F2FS_SET_SB_DIRT(sbi);
@ -768,20 +770,12 @@ int remove_inode_page(struct inode *inode)
dn.inode_page_locked = 1;
truncate_node(&dn);
}
if (inode->i_blocks == 1) {
/* inernally call f2fs_put_page() */
set_new_dnode(&dn, inode, page, page, ino);
truncate_node(&dn);
} else if (inode->i_blocks == 0) {
struct node_info ni;
get_node_info(sbi, inode->i_ino, &ni);
/* called after f2fs_new_inode() is failed */
BUG_ON(ni.blk_addr != NULL_ADDR);
f2fs_put_page(page, 1);
} else {
BUG();
}
/* 0 is possible, after f2fs_new_inode() is failed */
BUG_ON(inode->i_blocks != 0 && inode->i_blocks != 1);
set_new_dnode(&dn, inode, page, page, ino);
truncate_node(&dn);
mutex_unlock_op(sbi, NODE_TRUNC);
return 0;
}
@ -845,6 +839,7 @@ struct page *new_node_page(struct dnode_of_data *dn, unsigned int ofs)
return page;
fail:
clear_node_page_dirty(page);
f2fs_put_page(page, 1);
return ERR_PTR(err);
}