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Date:   Mon, 24 Apr 2023 23:54:28 +0800
From:   kernel test robot <lkp@...el.com>
To:     Sarthak Kukreti <sarthakkukreti@...omium.org>, dm-devel@...hat.com,
        linux-block@...r.kernel.org, linux-ext4@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Cc:     llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
        Jens Axboe <axboe@...nel.dk>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Jason Wang <jasowang@...hat.com>,
        Stefan Hajnoczi <stefanha@...hat.com>,
        Alasdair Kergon <agk@...hat.com>,
        Mike Snitzer <snitzer@...nel.org>,
        Christoph Hellwig <hch@...radead.org>,
        Brian Foster <bfoster@...hat.com>,
        Theodore Ts'o <tytso@....edu>,
        Andreas Dilger <adilger.kernel@...ger.ca>,
        Bart Van Assche <bvanassche@...gle.com>,
        Daniil Lunev <dlunev@...gle.com>,
        "Darrick J. Wong" <djwong@...nel.org>
Subject: Re: [PATCH v5 1/5] block: Don't invalidate pagecache for invalid
 falloc modes

Hi Sarthak,

kernel test robot noticed the following build warnings:

[auto build test WARNING on device-mapper-dm/for-next]
[also build test WARNING on linus/master v6.3 next-20230421]
[cannot apply to axboe-block/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/Sarthak-Kukreti/block-Introduce-provisioning-primitives/20230420-095025
base:   https://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm.git for-next
patch link:    https://lore.kernel.org/r/20230420004850.297045-2-sarthakkukreti%40chromium.org
patch subject: [PATCH v5 1/5] block: Don't invalidate pagecache for invalid falloc modes
config: hexagon-randconfig-r006-20230424 (https://download.01.org/0day-ci/archive/20230424/202304242302.5zYRfUub-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project 437b7602e4a998220871de78afcb020b9c14a661)
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/8bd0744b438be1722c5f8c1fe077e9dcef0e81b7
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Sarthak-Kukreti/block-Introduce-provisioning-primitives/20230420-095025
        git checkout 8bd0744b438be1722c5f8c1fe077e9dcef0e81b7
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash

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/202304242302.5zYRfUub-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from block/fops.c:9:
   In file included from include/linux/blkdev.h:9:
   In file included from include/linux/blk_types.h:10:
   In file included from include/linux/bvec.h:10:
   In file included from include/linux/highmem.h:12:
   In file included from include/linux/hardirq.h:11:
   In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
   In file included from include/asm-generic/hardirq.h:17:
   In file included from include/linux/irq.h:20:
   In file included from include/linux/io.h:13:
   In file included from arch/hexagon/include/asm/io.h:334:
   include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           val = __raw_readb(PCI_IOBASE + addr);
                             ~~~~~~~~~~ ^
   include/asm-generic/io.h:560:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                           ~~~~~~~~~~ ^
   include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
   #define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                     ^
   In file included from block/fops.c:9:
   In file included from include/linux/blkdev.h:9:
   In file included from include/linux/blk_types.h:10:
   In file included from include/linux/bvec.h:10:
   In file included from include/linux/highmem.h:12:
   In file included from include/linux/hardirq.h:11:
   In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
   In file included from include/asm-generic/hardirq.h:17:
   In file included from include/linux/irq.h:20:
   In file included from include/linux/io.h:13:
   In file included from arch/hexagon/include/asm/io.h:334:
   include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                           ~~~~~~~~~~ ^
   include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
   #define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                     ^
   In file included from block/fops.c:9:
   In file included from include/linux/blkdev.h:9:
   In file included from include/linux/blk_types.h:10:
   In file included from include/linux/bvec.h:10:
   In file included from include/linux/highmem.h:12:
   In file included from include/linux/hardirq.h:11:
   In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
   In file included from include/asm-generic/hardirq.h:17:
   In file included from include/linux/irq.h:20:
   In file included from include/linux/io.h:13:
   In file included from arch/hexagon/include/asm/io.h:334:
   include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           __raw_writeb(value, PCI_IOBASE + addr);
                               ~~~~~~~~~~ ^
   include/asm-generic/io.h:594:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                         ~~~~~~~~~~ ^
   include/asm-generic/io.h:604:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                         ~~~~~~~~~~ ^
>> block/fops.c:678:2: warning: unused label 'fail' [-Wunused-label]
    fail:
    ^~~~~
   7 warnings generated.


vim +/fail +678 block/fops.c

cd82cca7ebfe9c Christoph Hellwig 2021-09-07  613  
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  614  #define	BLKDEV_FALLOC_FL_SUPPORTED					\
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  615  		(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE |		\
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  616  		 FALLOC_FL_ZERO_RANGE | FALLOC_FL_NO_HIDE_STALE)
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  617  
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  618  static long blkdev_fallocate(struct file *file, int mode, loff_t start,
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  619  			     loff_t len)
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  620  {
f278eb3d8178f9 Ming Lei          2021-09-23  621  	struct inode *inode = bdev_file_inode(file);
f278eb3d8178f9 Ming Lei          2021-09-23  622  	struct block_device *bdev = I_BDEV(inode);
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  623  	loff_t end = start + len - 1;
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  624  	loff_t isize;
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  625  	int error;
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  626  
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  627  	/* Fail if we don't recognize the flags. */
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  628  	if (mode & ~BLKDEV_FALLOC_FL_SUPPORTED)
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  629  		return -EOPNOTSUPP;
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  630  
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  631  	/* Don't go off the end of the device. */
2a93ad8fcb377b Christoph Hellwig 2021-10-18  632  	isize = bdev_nr_bytes(bdev);
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  633  	if (start >= isize)
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  634  		return -EINVAL;
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  635  	if (end >= isize) {
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  636  		if (mode & FALLOC_FL_KEEP_SIZE) {
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  637  			len = isize - start;
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  638  			end = start + len - 1;
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  639  		} else
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  640  			return -EINVAL;
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  641  	}
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  642  
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  643  	/*
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  644  	 * Don't allow IO that isn't aligned to logical block size.
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  645  	 */
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  646  	if ((start | len) & (bdev_logical_block_size(bdev) - 1))
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  647  		return -EINVAL;
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  648  
f278eb3d8178f9 Ming Lei          2021-09-23  649  	filemap_invalidate_lock(inode->i_mapping);
f278eb3d8178f9 Ming Lei          2021-09-23  650  
8bd0744b438be1 Sarthak Kukreti   2023-04-19  651  	/*
8bd0744b438be1 Sarthak Kukreti   2023-04-19  652  	 * Invalidate the page cache, including dirty pages, for valid
8bd0744b438be1 Sarthak Kukreti   2023-04-19  653  	 * de-allocate mode calls to fallocate().
8bd0744b438be1 Sarthak Kukreti   2023-04-19  654  	 */
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  655  	switch (mode) {
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  656  	case FALLOC_FL_ZERO_RANGE:
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  657  	case FALLOC_FL_ZERO_RANGE | FALLOC_FL_KEEP_SIZE:
8bd0744b438be1 Sarthak Kukreti   2023-04-19  658  		error = truncate_bdev_range(bdev, file->f_mode, start, end) ||
8bd0744b438be1 Sarthak Kukreti   2023-04-19  659  			blkdev_issue_zeroout(bdev, start >> SECTOR_SHIFT,
6549a874fb65e7 Pavel Begunkov    2021-10-20  660  					     len >> SECTOR_SHIFT, GFP_KERNEL,
6549a874fb65e7 Pavel Begunkov    2021-10-20  661  					     BLKDEV_ZERO_NOUNMAP);
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  662  		break;
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  663  	case FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE:
8bd0744b438be1 Sarthak Kukreti   2023-04-19  664  		error = truncate_bdev_range(bdev, file->f_mode, start, end) ||
8bd0744b438be1 Sarthak Kukreti   2023-04-19  665  			blkdev_issue_zeroout(bdev, start >> SECTOR_SHIFT,
6549a874fb65e7 Pavel Begunkov    2021-10-20  666  					     len >> SECTOR_SHIFT, GFP_KERNEL,
6549a874fb65e7 Pavel Begunkov    2021-10-20  667  					     BLKDEV_ZERO_NOFALLBACK);
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  668  		break;
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  669  	case FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE | FALLOC_FL_NO_HIDE_STALE:
8bd0744b438be1 Sarthak Kukreti   2023-04-19  670  		error = truncate_bdev_range(bdev, file->f_mode, start, end) ||
8bd0744b438be1 Sarthak Kukreti   2023-04-19  671  			blkdev_issue_discard(bdev, start >> SECTOR_SHIFT,
44abff2c0b970a Christoph Hellwig 2022-04-15  672  					     len >> SECTOR_SHIFT, GFP_KERNEL);
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  673  		break;
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  674  	default:
f278eb3d8178f9 Ming Lei          2021-09-23  675  		error = -EOPNOTSUPP;
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  676  	}
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  677  
f278eb3d8178f9 Ming Lei          2021-09-23 @678   fail:
f278eb3d8178f9 Ming Lei          2021-09-23  679  	filemap_invalidate_unlock(inode->i_mapping);
f278eb3d8178f9 Ming Lei          2021-09-23  680  	return error;
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  681  }
cd82cca7ebfe9c Christoph Hellwig 2021-09-07  682  

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

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