linux-kernel - RE: [PATCH v7 10/11] xfstests: fsstress: Add fallocate insert range operation

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Message-id: <001801d02a3d$7125aad0$53710070$@samsung.com>
Date:	Wed, 07 Jan 2015 14:47:37 +0900
From:	Namjae Jeon <namjae.jeon@...sung.com>
To:	'Brian Foster' <bfoster@...hat.com>
Cc:	'Dave Chinner' <david@...morbit.com>,
	'Theodore Ts'o' <tytso@....edu>, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	'linux-ext4' <linux-ext4@...r.kernel.org>, xfs@....sgi.com,
	'Ashish Sangwan' <a.sangwan@...sung.com>
Subject: RE: [PATCH v7 10/11]  xfstests: fsstress: Add fallocate insert range
 operation

> 
> On Fri, Jan 02, 2015 at 06:42:51PM +0900, Namjae Jeon wrote:
> > This commit adds insert operation support for fsstress, which is
> > meant to exercise fallocate FALLOC_FL_INSERT_RANGE support.
> >
> > Signed-off-by: Namjae Jeon <namjae.jeon@...sung.com>
> > Signed-off-by: Ashish Sangwan <a.sangwan@...sung.com>
> > ---
> 
> It might be nice to avoid setting FALLOC_FL_KEEP_SIZE for insert and
> collapse ops alike (see the only use of KEEP_SIZE in fsstress.c) to
> increase the likelihood of valid fallocate() calls. We currently set it
> randomly, but unconditionally across all fallocate ops.
> 
> That could be done in a separate patch, however, and this looks good to
> me:
Thank you! I will share a separate patch.

> 
> Reviewed-by: Brian Foster <bfoster@...hat.com>
> 
> >  ltp/fsstress.c | 19 ++++++++++++++++---
> >  src/global.h   |  4 ++++
> >  2 files changed, 20 insertions(+), 3 deletions(-)
> >
> > diff --git a/ltp/fsstress.c b/ltp/fsstress.c
> > index b56fe5c..aa3e0c3 100644
> > --- a/ltp/fsstress.c
> > +++ b/ltp/fsstress.c
> > @@ -72,6 +72,7 @@ typedef enum {
> >  	OP_PUNCH,
> >  	OP_ZERO,
> >  	OP_COLLAPSE,
> > +	OP_INSERT,
> >  	OP_READ,
> >  	OP_READLINK,
> >  	OP_RENAME,
> > @@ -170,6 +171,7 @@ void	mknod_f(int, long);
> >  void	punch_f(int, long);
> >  void	zero_f(int, long);
> >  void	collapse_f(int, long);
> > +void	insert_f(int, long);
> >  void	read_f(int, long);
> >  void	readlink_f(int, long);
> >  void	rename_f(int, long);
> > @@ -209,6 +211,7 @@ opdesc_t	ops[] = {
> >  	{ OP_PUNCH, "punch", punch_f, 1, 1 },
> >  	{ OP_ZERO, "zero", zero_f, 1, 1 },
> >  	{ OP_COLLAPSE, "collapse", collapse_f, 1, 1 },
> > +	{ OP_INSERT, "insert", insert_f, 1, 1 },
> >  	{ OP_READ, "read", read_f, 1, 0 },
> >  	{ OP_READLINK, "readlink", readlink_f, 1, 0 },
> >  	{ OP_RENAME, "rename", rename_f, 2, 1 },
> > @@ -2176,6 +2179,7 @@ struct print_flags falloc_flags [] = {
> >  	{ FALLOC_FL_NO_HIDE_STALE, "NO_HIDE_STALE"},
> >  	{ FALLOC_FL_COLLAPSE_RANGE, "COLLAPSE_RANGE"},
> >  	{ FALLOC_FL_ZERO_RANGE, "ZERO_RANGE"},
> > +	{ FALLOC_FL_INSERT_RANGE, "INSERT_RANGE"},
> >  	{ -1, NULL}
> >  };
> >
> > @@ -2227,10 +2231,11 @@ do_fallocate(int opno, long r, int mode)
> >  	off %= maxfsize;
> >  	len = (off64_t)(random() % (1024 * 1024));
> >  	/*
> > -	 * Collapse range requires off and len to be block aligned, make it
> > -	 * more likely to be the case.
> > +	 * Collapse/insert range requires off and len to be block aligned,
> > +	 * make it more likely to be the case.
> >  	 */
> > -	if ((mode & FALLOC_FL_COLLAPSE_RANGE) && (opno % 2)) {
> > +	if ((mode & (FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_INSERT_RANGE)) &&
> > +		(opno % 2)) {
> >  		off = ((off + stb.st_blksize - 1) & ~(stb.st_blksize - 1));
> >  		len = ((len + stb.st_blksize - 1) & ~(stb.st_blksize - 1));
> >  	}
> > @@ -2656,6 +2661,14 @@ collapse_f(int opno, long r)
> >  }
> >
> >  void
> > +insert_f(int opno, long r)
> > +{
> > +#ifdef HAVE_LINUX_FALLOC_H
> > +	do_fallocate(opno, r, FALLOC_FL_INSERT_RANGE);
> > +#endif
> > +}
> > +
> > +void
> >  read_f(int opno, long r)
> >  {
> >  	char		*buf;
> > diff --git a/src/global.h b/src/global.h
> > index 8180f66..f63246b 100644
> > --- a/src/global.h
> > +++ b/src/global.h
> > @@ -172,6 +172,10 @@
> >  #define FALLOC_FL_ZERO_RANGE		0x10
> >  #endif
> >
> > +#ifndef FALLOC_FL_INSERT_RANGE
> > +#define FALLOC_FL_INSERT_RANGE		0x20
> > +#endif
> > +
> >  #endif /* HAVE_LINUX_FALLOC_H */
> >
> >  #endif /* GLOBAL_H */
> > --
> > 1.7.11-rc0
> >

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