Date:   Wed, 26 Jan 2022 07:12:14 +0800
From:   kernel test robot <lkp@...el.com>
To:     Filipe Manana <fdmanana@...e.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        David Sterba <dsterba@...e.com>, linux-doc@...r.kernel.org
Subject: [kdave-btrfs-devel:misc-next 149/153] fs/btrfs/tree-log.c:6755:
 warning: This comment starts with '/**', but isn't a kernel-doc comment.
 Refer Documentation/doc-guide/kernel-doc.rst

tree:   https://github.com/kdave/btrfs-devel.git misc-next
head:   8e5d6a5c062f370d4d0b2dace7e95ab40c6ce3dd
commit: 6bfc5d45946acd8286fb026137f20ee8747a50f1 [149/153] btrfs: pass the dentry to btrfs_log_new_name() instead of the inode
config: nds32-allyesconfig (https://download.01.org/0day-ci/archive/20220126/202201260759.edlA9lHT-lkp@intel.com/config)
compiler: nds32le-linux-gcc (GCC) 11.2.0
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/kdave/btrfs-devel/commit/6bfc5d45946acd8286fb026137f20ee8747a50f1
        git remote add kdave-btrfs-devel https://github.com/kdave/btrfs-devel.git
        git fetch --no-tags kdave-btrfs-devel misc-next
        git checkout 6bfc5d45946acd8286fb026137f20ee8747a50f1
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=nds32 SHELL=/bin/bash fs/btrfs/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

>> fs/btrfs/tree-log.c:6755: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
    * Update the log after adding a new name for an inode.


vim +6755 fs/btrfs/tree-log.c

  6753	
  6754	/**
> 6755	 * Update the log after adding a new name for an inode.
  6756	 *
  6757	 * @trans:              Transaction handle.
  6758	 * @old_dentry:         The dentry associated with the old name and the old
  6759	 *                      parent directory.
  6760	 * @old_dir:            The inode of the previous parent directory for the case
  6761	 *                      of a rename. For a link operation, it must be NULL.
  6762	 * @parent:             The dentry associated with the directory under which the
  6763	 *                      new name is located.
  6764	 *
  6765	 * Call this after adding a new name for an inode, as a result of a link or
  6766	 * rename operation, and it will properly update the log to reflect the new name.
  6767	 */
  6768	void btrfs_log_new_name(struct btrfs_trans_handle *trans,
  6769				struct dentry *old_dentry, struct btrfs_inode *old_dir,
  6770				struct dentry *parent)
  6771	{
  6772		struct btrfs_inode *inode = BTRFS_I(d_inode(old_dentry));
  6773		struct btrfs_log_ctx ctx;
  6774	
  6775		/*
  6776		 * this will force the logging code to walk the dentry chain
  6777		 * up for the file
  6778		 */
  6779		if (!S_ISDIR(inode->vfs_inode.i_mode))
  6780			inode->last_unlink_trans = trans->transid;
  6781	
  6782		/*
  6783		 * if this inode hasn't been logged and directory we're renaming it
  6784		 * from hasn't been logged, we don't need to log it
  6785		 */
  6786		if (!inode_logged(trans, inode) &&
  6787		    (!old_dir || !inode_logged(trans, old_dir)))
  6788			return;
  6789	
  6790		/*
  6791		 * If we are doing a rename (old_dir is not NULL) from a directory that
  6792		 * was previously logged, make sure the next log attempt on the directory
  6793		 * is not skipped and logs the inode again. This is because the log may
  6794		 * not currently be authoritative for a range including the old
  6795		 * BTRFS_DIR_INDEX_KEY key, so we want to make sure after a log replay we
  6796		 * do not end up with both the new and old dentries around (in case the
  6797		 * inode is a directory we would have a directory with two hard links and
  6798		 * 2 inode references for different parents). The next log attempt of
  6799		 * old_dir will happen at btrfs_log_all_parents(), called through
  6800		 * btrfs_log_inode_parent() below, because we have previously set
  6801		 * inode->last_unlink_trans to the current transaction ID, either here or
  6802		 * at btrfs_record_unlink_dir() in case the inode is a directory.
  6803		 */
  6804		if (old_dir)
  6805			old_dir->logged_trans = 0;
  6806	
  6807		btrfs_init_log_ctx(&ctx, &inode->vfs_inode);
  6808		ctx.logging_new_name = true;
  6809		/*
  6810		 * We don't care about the return value. If we fail to log the new name
  6811		 * then we know the next attempt to sync the log will fallback to a full
  6812		 * transaction commit (due to a call to btrfs_set_log_full_commit()), so
  6813		 * we don't need to worry about getting a log committed that has an
  6814		 * inconsistent state after a rename operation.
  6815		 */
  6816		btrfs_log_inode_parent(trans, inode, parent, LOG_INODE_EXISTS, &ctx);
  6817	}
  6818	

---
0-DAY CI Kernel Test Service, Intel Corporation
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