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Date:   Mon, 13 Feb 2023 14:19:10 +0800
From:   kernel test robot <lkp@...el.com>
To:     zhanchengbin <zhanchengbin1@...wei.com>, tytso@....edu,
        jack@...e.com
Cc:     llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
        linux-ext4@...r.kernel.org, yi.zhang@...wei.com,
        linfeilong@...wei.com, liuzhiqiang26@...wei.com,
        zhanchengbin <zhanchengbin1@...wei.com>
Subject: Re: [PATCH v4 2/2] ext4: clear the verified flag of the modified
 leaf or idx if error

Hi zhanchengbin,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on tytso-ext4/dev]
[also build test ERROR on jack-fs/for_next linus/master v6.2-rc8 next-20230210]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/zhanchengbin/ext4-fix-inode-tree-inconsistency-caused-by-ENOMEM-in-ext4_split_extent_at/20230213-114334
base:   https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git dev
patch link:    https://lore.kernel.org/r/20230213040522.3339406-3-zhanchengbin1%40huawei.com
patch subject: [PATCH v4 2/2] ext4: clear the verified flag of the modified leaf or idx if error
config: i386-randconfig-a004-20230213 (https://download.01.org/0day-ci/archive/20230213/202302131407.XrieHNuN-lkp@intel.com/config)
compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project f28c006a5895fc0e329fe15fead81e37457cb1d1)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/intel-lab-lkp/linux/commit/c6de5d67952addd5ffa288574ed55ebe7aeba755
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review zhanchengbin/ext4-fix-inode-tree-inconsistency-caused-by-ENOMEM-in-ext4_split_extent_at/20230213-114334
        git checkout c6de5d67952addd5ffa288574ed55ebe7aeba755
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash fs/ext4/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202302131407.XrieHNuN-lkp@intel.com/

All errors (new ones prefixed by >>):

>> fs/ext4/extents.c:1760:32: error: member reference type 'struct ext4_ext_path' is not a pointer; did you mean to use '.'?
                   clear_buffer_verified(path[k]->p_bh);
                                         ~~~~~~~^~
                                                .
   fs/ext4/extents.c:2352:36: error: member reference type 'struct ext4_ext_path' is not a pointer; did you mean to use '.'?
                   clear_buffer_verified(path[depth]->p_bh);
                                         ~~~~~~~~~~~^~
                                                    .
   2 errors generated.


vim +1760 fs/ext4/extents.c

  1699	
  1700	/*
  1701	 * ext4_ext_correct_indexes:
  1702	 * if leaf gets modified and modified extent is first in the leaf,
  1703	 * then we have to correct all indexes above.
  1704	 * TODO: do we need to correct tree in all cases?
  1705	 */
  1706	static int ext4_ext_correct_indexes(handle_t *handle, struct inode *inode,
  1707					struct ext4_ext_path *path)
  1708	{
  1709		struct ext4_extent_header *eh;
  1710		int depth = ext_depth(inode);
  1711		struct ext4_extent *ex;
  1712		__le32 border;
  1713		int k, err = 0;
  1714	
  1715		eh = path[depth].p_hdr;
  1716		ex = path[depth].p_ext;
  1717	
  1718		if (unlikely(ex == NULL || eh == NULL)) {
  1719			EXT4_ERROR_INODE(inode,
  1720					 "ex %p == NULL or eh %p == NULL", ex, eh);
  1721			return -EFSCORRUPTED;
  1722		}
  1723	
  1724		if (depth == 0) {
  1725			/* there is no tree at all */
  1726			return 0;
  1727		}
  1728	
  1729		if (ex != EXT_FIRST_EXTENT(eh)) {
  1730			/* we correct tree if first leaf got modified only */
  1731			return 0;
  1732		}
  1733	
  1734		/*
  1735		 * TODO: we need correction if border is smaller than current one
  1736		 */
  1737		k = depth - 1;
  1738		border = path[depth].p_ext->ee_block;
  1739		err = ext4_ext_get_access(handle, inode, path + k);
  1740		if (err)
  1741			return err;
  1742		path[k].p_idx->ei_block = border;
  1743		err = ext4_ext_dirty(handle, inode, path + k);
  1744		if (err)
  1745			return err;
  1746	
  1747		while (k--) {
  1748			/* change all left-side indexes */
  1749			if (path[k+1].p_idx != EXT_FIRST_INDEX(path[k+1].p_hdr))
  1750				break;
  1751			err = ext4_ext_get_access(handle, inode, path + k);
  1752			if (err)
  1753				break;
  1754			path[k].p_idx->ei_block = border;
  1755			err = ext4_ext_dirty(handle, inode, path + k);
  1756			if (err)
  1757				break;
  1758		}
  1759		while (!(k < 0) && k++ < depth)
> 1760			clear_buffer_verified(path[k]->p_bh);
  1761	
  1762		return err;
  1763	}
  1764	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests

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