diff mbox series

[v4,2/3] scsi: scsi_ioctl: add sg_io_to_blk_status()

Message ID 20210628095210.26249-3-mwilck@suse.com (mailing list archive)
State New, archived
Headers show
Series scsi/dm: dm_blk_ioctl(): implement failover for SG_IO on dm-multipath | expand

Commit Message

Martin Wilck June 28, 2021, 9:52 a.m. UTC 
From: Martin Wilck <mwilck@suse.com>

This helper converts the SCSI result in a sg_io_hdr struct to a blk_status_t.
It will be used in the SG_IO code path for dm-multipath. Putting it into
scsi_ioctl.c avoids open-coding SCSI specific code in the dm layer.

Signed-off-by: Martin Wilck <mwilck@suse.com>
---
 block/scsi_ioctl.c     | 20 ++++++++++++++++++++
 include/linux/blkdev.h |  1 +
 2 files changed, 21 insertions(+)

Comments

kernel test robot June 28, 2021, 2:39 p.m. UTC | #1 
Hi,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on mkp-scsi/for-next]
[also build test WARNING on scsi/for-next next-20210628]
[cannot apply to dm/for-next block/for-next song-md/md-next v5.13]
[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]

url:    https://github.com/0day-ci/linux/commits/mwilck-suse-com/scsi-dm-dm_blk_ioctl-implement-failover-for-SG_IO-on-dm-multipath/20210628-175410
base:   https://git.kernel.org/pub/scm/linux/kernel/git/mkp/scsi.git for-next
config: x86_64-randconfig-r032-20210628 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 4c92e31dd0f1bd152eda883af20ff7fbcaa14945)
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
        # install x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # https://github.com/0day-ci/linux/commit/259453ca972ae531cfdca07cbf4d6bb09b8f8c9f
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review mwilck-suse-com/scsi-dm-dm_blk_ioctl-implement-failover-for-SG_IO-on-dm-multipath/20210628-175410
        git checkout 259453ca972ae531cfdca07cbf4d6bb09b8f8c9f
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

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

All warnings (new ones prefixed by >>):

>> block/scsi_ioctl.c:937:6: warning: logical not is only applied to the left hand side of this bitwise operator [-Wlogical-not-parentheses]
           if (!hdr->info & SG_INFO_CHECK)
               ^          ~
   include/linux/compiler.h:56:47: note: expanded from macro 'if'
   #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
                                                 ^~~~
   include/linux/compiler.h:58:52: note: expanded from macro '__trace_if_var'
   #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
                                                      ^~~~
   block/scsi_ioctl.c:937:6: note: add parentheses after the '!' to evaluate the bitwise operator first
   block/scsi_ioctl.c:937:6: note: add parentheses around left hand side expression to silence this warning
>> block/scsi_ioctl.c:937:6: warning: logical not is only applied to the left hand side of this bitwise operator [-Wlogical-not-parentheses]
           if (!hdr->info & SG_INFO_CHECK)
               ^          ~
   include/linux/compiler.h:56:47: note: expanded from macro 'if'
   #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
                                                 ^~~~
   include/linux/compiler.h:58:61: note: expanded from macro '__trace_if_var'
   #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
                                                               ^~~~
   block/scsi_ioctl.c:937:6: note: add parentheses after the '!' to evaluate the bitwise operator first
   block/scsi_ioctl.c:937:6: note: add parentheses around left hand side expression to silence this warning
>> block/scsi_ioctl.c:937:6: warning: logical not is only applied to the left hand side of this bitwise operator [-Wlogical-not-parentheses]
           if (!hdr->info & SG_INFO_CHECK)
               ^          ~
   include/linux/compiler.h:56:47: note: expanded from macro 'if'
   #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
                                                 ^~~~
   include/linux/compiler.h:58:86: note: expanded from macro '__trace_if_var'
   #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
                                                                                        ^~~~
   include/linux/compiler.h:69:3: note: expanded from macro '__trace_if_value'
           (cond) ?                                        \
            ^~~~
   block/scsi_ioctl.c:937:6: note: add parentheses after the '!' to evaluate the bitwise operator first
   block/scsi_ioctl.c:937:6: note: add parentheses around left hand side expression to silence this warning
   3 warnings generated.


vim +937 block/scsi_ioctl.c

   931	
   932	blk_status_t sg_io_to_blk_status(struct sg_io_hdr *hdr)
   933	{
   934		int result;
   935		blk_status_t sts;
   936	
 > 937		if (!hdr->info & SG_INFO_CHECK)
   938			return BLK_STS_OK;
   939	
   940		result = hdr->status |
   941			(hdr->msg_status << 8) |
   942			(hdr->host_status << 16) |
   943			(hdr->driver_status << 24);
   944	
   945		sts = __scsi_result_to_blk_status(&result, result);
   946		hdr->host_status = host_byte(result);
   947	
   948		return sts;
   949	}
   950	EXPORT_SYMBOL(sg_io_to_blk_status);
   951	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
Dan Carpenter June 29, 2021, 7 a.m. UTC | #2 
Hi,

url:    https://github.com/0day-ci/linux/commits/mwilck-suse-com/scsi-dm-dm_blk_ioctl-implement-failover-for-SG_IO-on-dm-multipath/20210628-175410 
base:   https://git.kernel.org/pub/scm/linux/kernel/git/mkp/scsi.git  for-next
config: xtensa-randconfig-s032-20210628 (attached as .config)
compiler: xtensa-linux-gcc (GCC) 9.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross  -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.3-341-g8af24329-dirty
        # https://github.com/0day-ci/linux/commit/259453ca972ae531cfdca07cbf4d6bb09b8f8c9f 
        git remote add linux-review https://github.com/0day-ci/linux 
        git fetch --no-tags linux-review mwilck-suse-com/scsi-dm-dm_blk_ioctl-implement-failover-for-SG_IO-on-dm-multipath/20210628-175410
        git checkout 259453ca972ae531cfdca07cbf4d6bb09b8f8c9f
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=xtensa SHELL=/bin/bash

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

sparse warnings: (new ones prefixed by >>)
>> block/scsi_ioctl.c:937:24: sparse: sparse: dubious: !x & y

vim +937 block/scsi_ioctl.c

259453ca972ae5 Martin Wilck 2021-06-28  932  blk_status_t sg_io_to_blk_status(struct sg_io_hdr *hdr)
259453ca972ae5 Martin Wilck 2021-06-28  933  {
259453ca972ae5 Martin Wilck 2021-06-28  934  	int result;
259453ca972ae5 Martin Wilck 2021-06-28  935  	blk_status_t sts;
259453ca972ae5 Martin Wilck 2021-06-28  936  
259453ca972ae5 Martin Wilck 2021-06-28 @937  	if (!hdr->info & SG_INFO_CHECK)
                                                    ^
Should be if (!(hdr->info & SG_INFO_CHECK))

259453ca972ae5 Martin Wilck 2021-06-28  938  		return BLK_STS_OK;
259453ca972ae5 Martin Wilck 2021-06-28  939  
259453ca972ae5 Martin Wilck 2021-06-28  940  	result = hdr->status |
259453ca972ae5 Martin Wilck 2021-06-28  941  		(hdr->msg_status << 8) |
259453ca972ae5 Martin Wilck 2021-06-28  942  		(hdr->host_status << 16) |
259453ca972ae5 Martin Wilck 2021-06-28  943  		(hdr->driver_status << 24);
259453ca972ae5 Martin Wilck 2021-06-28  944  
259453ca972ae5 Martin Wilck 2021-06-28  945  	sts = __scsi_result_to_blk_status(&result, result);
259453ca972ae5 Martin Wilck 2021-06-28  946  	hdr->host_status = host_byte(result);
259453ca972ae5 Martin Wilck 2021-06-28  947  
259453ca972ae5 Martin Wilck 2021-06-28  948  	return sts;
259453ca972ae5 Martin Wilck 2021-06-28  949  }

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
diff mbox series

Patch

diff --git a/block/scsi_ioctl.c b/block/scsi_ioctl.c
index 19b63b64ecbc..f226cac02e88 100644
--- a/block/scsi_ioctl.c
+++ b/block/scsi_ioctl.c
@@ -929,6 +929,26 @@  blk_status_t __scsi_result_to_blk_status(int *cmd_result, int result)
 }
 EXPORT_SYMBOL(__scsi_result_to_blk_status);
 
+blk_status_t sg_io_to_blk_status(struct sg_io_hdr *hdr)
+{
+	int result;
+	blk_status_t sts;
+
+	if (!hdr->info & SG_INFO_CHECK)
+		return BLK_STS_OK;
+
+	result = hdr->status |
+		(hdr->msg_status << 8) |
+		(hdr->host_status << 16) |
+		(hdr->driver_status << 24);
+
+	sts = __scsi_result_to_blk_status(&result, result);
+	hdr->host_status = host_byte(result);
+
+	return sts;
+}
+EXPORT_SYMBOL(sg_io_to_blk_status);
+
 static int __init blk_scsi_ioctl_init(void)
 {
 	blk_set_cmd_filter_defaults(&blk_default_cmd_filter);
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 48497a77428d..5da03edf125c 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -2022,4 +2022,5 @@  int freeze_bdev(struct block_device *bdev);
 int thaw_bdev(struct block_device *bdev);
 
 blk_status_t __scsi_result_to_blk_status(int *cmd_result, int result);
+blk_status_t sg_io_to_blk_status(struct sg_io_hdr *hdr);
 #endif /* _LINUX_BLKDEV_H */