Hi, It turns out that make_bad_inode prior to iput sets i_mode to a regular file, so that f2fs_evict_inode -> truncate_inode_pages -> f2fs_invalidate_data_page doesn't decrement dirty_dents. This patch should resolve the bug. Thank you :)
---- When a new directory is allocated, if an error is occurred, we should truncate preallocated dentry pages too. This bug was reported by Andrey Tsyvarev after a while as follows. mkdir()-> f2fs_add_link()-> init_inode_metadata()-> f2fs_init_acl()-> f2fs_get_acl()-> f2fs_getxattr()-> read_all_xattrs() fails. Also there was a BUG_ON triggered after the fault in mkdir()-> f2fs_add_link()-> init_inode_metadata()-> remove_inode_page() -> f2fs_bug_on(inode->i_blocks != 0 && inode->i_blocks != 1); But, previous patch wasn't perfect to resolve that bug, so the following bug report was also submitted. kernel BUG at fs/f2fs/inode.c:274! Call Trace: [<ffffffff811fde03>] evict+0xa3/0x1a0 [<ffffffff811fe615>] iput+0xf5/0x180 [<ffffffffa01c7f63>] f2fs_mkdir+0xf3/0x150 [f2fs] [<ffffffff811f2a77>] vfs_mkdir+0xb7/0x160 [<ffffffff811f36bf>] SyS_mkdir+0x5f/0xc0 [<ffffffff81680769>] system_call_fastpath+0x16/0x1b Finally, this patch resolves all the issues like below. If an error is occurred after make_empty_dir(), 1. truncate_inode_pages() The make_bad_inode() prior to iput() will change i_mode to S_IFREG, which means that f2fs will not decrement fi->dirty_dents during f2fs_evict_inode. But, by calling it here, we can do that. 2. truncate_blocks() Preallocated dentry pages are trucated here to sync i_blocks. Reported-by: Andrey Tsyvarev <tsyva...@ispras.ru> Signed-off-by: Jaegeuk Kim <jaegeuk....@samsung.com> --- fs/f2fs/dir.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c index bfcb4ae..92ce1db 100644 --- a/fs/f2fs/dir.c +++ b/fs/f2fs/dir.c @@ -372,6 +372,9 @@ static struct page *init_inode_metadata(struct inode *inode, put_error: f2fs_put_page(page, 1); + /* once the failed inode becomes a bad inode, i_mode is S_IFREG */ + truncate_inode_pages(&inode->i_data, 0); + truncate_blocks(inode, 0); error: remove_inode_page(inode); return ERR_PTR(err); -- 1.8.4.474.g128a96c -- Jaegeuk Kim Samsung -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/