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author | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2012-12-20 15:10:06 +0900 |
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committer | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2012-12-28 11:24:09 +0900 |
commit | 71e9fec548a95b2a4cf378646addd5d3098684a2 (patch) | |
tree | 129aef9aacfb87ec29d67a8ca95422a82ab9db12 /fs/f2fs/node.c | |
parent | 690e4a3ead5f88fc95f7650816d1376aa2e79db5 (diff) | |
download | op-kernel-dev-71e9fec548a95b2a4cf378646addd5d3098684a2.zip op-kernel-dev-71e9fec548a95b2a4cf378646addd5d3098684a2.tar.gz |
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>
Diffstat (limited to 'fs/f2fs/node.c')
-rw-r--r-- | fs/f2fs/node.c | 29 |
1 files changed, 12 insertions, 17 deletions
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c index dffac1c..e85643c 100644 --- a/fs/f2fs/node.c +++ b/fs/f2fs/node.c @@ -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); } |