linux-ext4 - Re: [PATCH v5 04/10] fs: Expose name under lookup to d

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Date:   Thu, 17 Aug 2023 15:00:39 +0800
From:   kernel test robot <lkp@...el.com>
To:     Gabriel Krisman Bertazi <krisman@...e.de>, viro@...iv.linux.org.uk,
        brauner@...nel.org, tytso@....edu, ebiggers@...nel.org,
        jaegeuk@...nel.org
Cc:     oe-kbuild-all@...ts.linux.dev, linux-fsdevel@...r.kernel.org,
        linux-ext4@...r.kernel.org, linux-f2fs-devel@...ts.sourceforge.net,
        Gabriel Krisman Bertazi <krisman@...e.de>
Subject: Re: [PATCH v5 04/10] fs: Expose name under lookup to d_revalidate
 hooks

Hi Gabriel,

kernel test robot noticed the following build warnings:

[auto build test WARNING on tytso-ext4/dev]
[also build test WARNING on linus/master]
[cannot apply to tyhicks-ecryptfs/next ericvh-v9fs/for-next]
[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/Gabriel-Krisman-Bertazi/fs-Expose-helper-to-check-if-a-directory-needs-casefolding/20230812-084506
base:   https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git dev
patch link:    https://lore.kernel.org/r/20230812004146.30980-5-krisman%40suse.de
patch subject: [PATCH v5 04/10] fs: Expose name under lookup to d_revalidate hooks
config: mips-randconfig-r002-20230817 (https://download.01.org/0day-ci/archive/20230817/202308171453.3HpCqtib-lkp@intel.com/config)
compiler: mipsel-linux-gcc (GCC) 12.3.0
reproduce: (https://download.01.org/0day-ci/archive/20230817/202308171453.3HpCqtib-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202308171453.3HpCqtib-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> fs/ecryptfs/dentry.c:33: warning: Function parameter or member 'name' not described in 'ecryptfs_d_revalidate'


vim +33 fs/ecryptfs/dentry.c

237fead619984c Michael Halcrow         2006-10-04  17  
237fead619984c Michael Halcrow         2006-10-04  18  /**
237fead619984c Michael Halcrow         2006-10-04  19   * ecryptfs_d_revalidate - revalidate an ecryptfs dentry
237fead619984c Michael Halcrow         2006-10-04  20   * @dentry: The ecryptfs dentry
0b728e1911cbe6 Al Viro                 2012-06-10  21   * @flags: lookup flags
237fead619984c Michael Halcrow         2006-10-04  22   *
237fead619984c Michael Halcrow         2006-10-04  23   * Called when the VFS needs to revalidate a dentry. This
237fead619984c Michael Halcrow         2006-10-04  24   * is called whenever a name lookup finds a dentry in the
237fead619984c Michael Halcrow         2006-10-04  25   * dcache. Most filesystems leave this as NULL, because all their
237fead619984c Michael Halcrow         2006-10-04  26   * dentries in the dcache are valid.
237fead619984c Michael Halcrow         2006-10-04  27   *
237fead619984c Michael Halcrow         2006-10-04  28   * Returns 1 if valid, 0 otherwise.
237fead619984c Michael Halcrow         2006-10-04  29   *
237fead619984c Michael Halcrow         2006-10-04  30   */
0838ae103beaf6 Gabriel Krisman Bertazi 2023-08-11  31  static int ecryptfs_d_revalidate(struct dentry *dentry,
0838ae103beaf6 Gabriel Krisman Bertazi 2023-08-11  32  				 const struct qstr *name, unsigned int flags)
237fead619984c Michael Halcrow         2006-10-04 @33  {
2edbfbf1c1ab0a Al Viro                 2013-09-15  34  	struct dentry *lower_dentry = ecryptfs_dentry_to_lower(dentry);
5556e7e6d30e8e Tyler Hicks             2015-08-05  35  	int rc = 1;
237fead619984c Michael Halcrow         2006-10-04  36  
0b728e1911cbe6 Al Viro                 2012-06-10  37  	if (flags & LOOKUP_RCU)
34286d6662308d Nicholas Piggin         2011-01-07  38  		return -ECHILD;
34286d6662308d Nicholas Piggin         2011-01-07  39  
5556e7e6d30e8e Tyler Hicks             2015-08-05  40  	if (lower_dentry->d_flags & DCACHE_OP_REVALIDATE)
0838ae103beaf6 Gabriel Krisman Bertazi 2023-08-11  41  		rc = lower_dentry->d_op->d_revalidate(lower_dentry, name, flags);
5556e7e6d30e8e Tyler Hicks             2015-08-05  42  
2b0143b5c986be David Howells           2015-03-17  43  	if (d_really_is_positive(dentry)) {
5556e7e6d30e8e Tyler Hicks             2015-08-05  44  		struct inode *inode = d_inode(dentry);
ae56fb16337c88 Michael Halcrow         2006-11-16  45  
5556e7e6d30e8e Tyler Hicks             2015-08-05  46  		fsstack_copy_attr_all(inode, ecryptfs_inode_to_lower(inode));
5556e7e6d30e8e Tyler Hicks             2015-08-05  47  		if (!inode->i_nlink)
5556e7e6d30e8e Tyler Hicks             2015-08-05  48  			return 0;
ae56fb16337c88 Michael Halcrow         2006-11-16  49  	}
237fead619984c Michael Halcrow         2006-10-04  50  	return rc;
237fead619984c Michael Halcrow         2006-10-04  51  }
237fead619984c Michael Halcrow         2006-10-04  52  

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https://github.com/intel/lkp-tests/wiki