linux-ext4 - Re: [PATCH 1/2] common/xfs,xfs/207: Adding a common helper function to check xflag bits on a given file

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Message-ID: <20241025052744.GR21840@frogsfrogsfrogs>
Date: Thu, 24 Oct 2024 22:27:44 -0700
From: "Darrick J. Wong" <djwong@...nel.org>
To: Zorro Lang <zlang@...hat.com>
Cc: Nirjhar Roy <nirjhar@...ux.ibm.com>, fstests@...r.kernel.org,
	linux-ext4@...r.kernel.org, linux-xfs@...r.kernel.org,
	ritesh.list@...il.com, ojaswin@...ux.ibm.com, zlang@...nel.org
Subject: Re: [PATCH 1/2] common/xfs,xfs/207: Adding a common helper function
 to check xflag bits on a given file

On Fri, Oct 25, 2024 at 12:15:01PM +0800, Zorro Lang wrote:
> On Thu, Oct 24, 2024 at 09:07:03PM -0700, Darrick J. Wong wrote:
> > On Fri, Oct 25, 2024 at 10:56:51AM +0800, Zorro Lang wrote:
> > > On Wed, Oct 23, 2024 at 12:56:19AM +0530, Nirjhar Roy wrote:
> > > > This patch defines a common helper function to test whether any of
> > > > fsxattr xflags field is set or not. We will use this helper in the next
> > > > patch for checking extsize (e) flag.
> > > > 
> > > > Reviewed-by: Ritesh Harjani (IBM) <ritesh.list@...il.com>
> > > > Reviewed-by: Ojaswin Mujoo <ojaswin@...ux.ibm.com>
> > > > Signed-off-by: Nirjhar Roy <nirjhar@...ux.ibm.com>
> > > > ---
> > > >  common/xfs    |  9 +++++++++
> > > >  tests/xfs/207 | 14 +++-----------
> > > >  2 files changed, 12 insertions(+), 11 deletions(-)
> > > > 
> > > > diff --git a/common/xfs b/common/xfs
> > > > index 62e3100e..7340ccbf 100644
> > > > --- a/common/xfs
> > > > +++ b/common/xfs
> > > > @@ -13,6 +13,15 @@ __generate_xfs_report_vars() {
> > > >  	REPORT_ENV_LIST_OPT+=("TEST_XFS_REPAIR_REBUILD" "TEST_XFS_SCRUB_REBUILD")
> > > >  }
> > > >  
> > > > +# Check whether a fsxattr xflags character field is set on a given file.
> > > 
> > > Better to explain the arguments, e.g.
> > > 
> > > # Check whether a fsxattr xflags character ($2) field is set on a given file ($1).
> > > 
> > > > +# e.g. fsxattr.xflags = 0x0 [--------------C-]
> > > > +# Returns 0 if passed flag character is set, otherwise returns 1
> > > > +_test_xfs_xflags_field()
> > > > +{
> > > > +    $XFS_IO_PROG -c "stat" "$1" | grep "fsxattr.xflags" | grep -q "\[.*$2.*\]" \
> > > > +        && return 0 || return 1
> > > 
> > > That's too complex. Those "return" aren't needed as Darrick metioned. About
> > > that two "grep", how about combine them, e.g.
> > > 
> > > _test_xfs_xflags_field()
> > > {
> > > 	grep -q "fsxattr.xflags.*\[.*$2.*\]" <($XFS_IO_PROG -c "stat" "$1")
> > > }
> > > 
> > > 
> > > 
> > > > +}
> > > > +
> > > >  _setup_large_xfs_fs()
> > > >  {
> > > >  	fs_size=$1
> > > > diff --git a/tests/xfs/207 b/tests/xfs/207
> > > > index bbe21307..adb925df 100755
> > > > --- a/tests/xfs/207
> > > > +++ b/tests/xfs/207
> > > > @@ -15,21 +15,13 @@ _begin_fstest auto quick clone fiemap
> > > >  # Import common functions.
> > > >  . ./common/filter
> > > >  . ./common/reflink
> > > > +. ./common/xfs
> > > 
> > > Is this really necessary? Will this test fail without this line?
> > > The common/$FSTYP file is imported automatically, if it's not, that a bug.
> > 
> > If the generic helper goes in common/rc instead then it's not necessary
> > at all.
> 
> Won't the "_source_specific_fs $FSTYP" in common/rc helps to import common/xfs?

Yeah, that too.

--D

> > 
> > --D
> > 
> > > Thanks,
> > > Zorro
> > > 
> > > >  
> > > >  _require_scratch_reflink
> > > >  _require_cp_reflink
> > > >  _require_xfs_io_command "fiemap"
> > > >  _require_xfs_io_command "cowextsize"
> > > >  
> > > > -# Takes the fsxattr.xflags line,
> > > > -# i.e. fsxattr.xflags = 0x0 [--------------C-]
> > > > -# and tests whether a flag character is set
> > > > -test_xflag()
> > > > -{
> > > > -    local flg=$1
> > > > -    grep -q "\[.*${flg}.*\]" && echo "$flg flag set" || echo "$flg flag unset"
> > > > -}
> > > > -
> > > >  echo "Format and mount"
> > > >  _scratch_mkfs > $seqres.full 2>&1
> > > >  _scratch_mount >> $seqres.full 2>&1
> > > > @@ -65,14 +57,14 @@ echo "Set cowextsize and check flag"
> > > >  $XFS_IO_PROG -c "cowextsize 1048576" $testdir/file3 | _filter_scratch
> > > >  _scratch_cycle_mount
> > > >  
> > > > -$XFS_IO_PROG -c "stat" $testdir/file3 | grep 'fsxattr.xflags' | test_xflag "C"
> > > > +_test_xfs_xflags_field "$testdir/file3" "C" && echo "C flag set" || echo "C flag unset"
> > > >  $XFS_IO_PROG -c "cowextsize" $testdir/file3 | _filter_scratch
> > > >  
> > > >  echo "Unset cowextsize and check flag"
> > > >  $XFS_IO_PROG -c "cowextsize 0" $testdir/file3 | _filter_scratch
> > > >  _scratch_cycle_mount
> > > >  
> > > > -$XFS_IO_PROG -c "stat" $testdir/file3 | grep 'fsxattr.xflags' | test_xflag "C"
> > > > +_test_xfs_xflags_field "$testdir/file3" "C" && echo "C flag set" || echo "C flag unset"
> > > >  $XFS_IO_PROG -c "cowextsize" $testdir/file3 | _filter_scratch
> > > >  
> > > >  status=0
> > > > -- 
> > > > 2.43.5
> > > > 
> > > > 
> > > 
> > 
> 
>