Re: [PATCH 2/3] xfs_scrub: load and unload libicu properly

["Darrick J. Wong" <djwong@kernel.org>]

On Mon, Jan 11, 2021 at 07:45:15PM +0530, Chandan Babu R wrote:
> 
> On 09 Jan 2021 at 11:58, Darrick J. Wong wrote:
> > From: Darrick J. Wong <djwong@kernel.org>
> >
> > Make sure we actually load and unload libicu properly.  This isn't
> > strictly required since the library can bootstrap itself, but unloading
> > means fewer things for valgrind to complain about.
> >
> > Signed-off-by: Darrick J. Wong <djwong@kernel.org>
> > ---
> >  scrub/unicrash.c  |   17 +++++++++++++++++
> >  scrub/unicrash.h  |    4 ++++
> >  scrub/xfs_scrub.c |    6 ++++++
> >  3 files changed, 27 insertions(+)
> >
> >
> > diff --git a/scrub/unicrash.c b/scrub/unicrash.c
> > index d5d2cf20..de3217c2 100644
> > --- a/scrub/unicrash.c
> > +++ b/scrub/unicrash.c
> > @@ -722,3 +722,20 @@ unicrash_check_fs_label(
> >  	return __unicrash_check_name(uc, dsc, _("filesystem label"),
> >  			label, 0);
> >  }
> > +
> > +/* Load libicu and initialize it. */
> > +bool
> > +unicrash_load(void)
> > +{
> > +	UErrorCode		uerr = U_ZERO_ERROR;
> > +
> > +	u_init(&uerr);
> > +	return U_FAILURE(uerr);
> > +}
> > +
> > +/* Unload libicu once we're done with it. */
> > +void
> > +unicrash_unload(void)
> > +{
> > +	u_cleanup();
> > +}
> > diff --git a/scrub/unicrash.h b/scrub/unicrash.h
> > index c3a7f385..32cae3d4 100644
> > --- a/scrub/unicrash.h
> > +++ b/scrub/unicrash.h
> > @@ -25,6 +25,8 @@ int unicrash_check_xattr_name(struct unicrash *uc, struct descr *dsc,
> >  		const char *attrname);
> >  int unicrash_check_fs_label(struct unicrash *uc, struct descr *dsc,
> >  		const char *label);
> > +bool unicrash_load(void);
> > +void unicrash_unload(void);
> >  #else
> >  # define unicrash_dir_init(u, c, b)		(0)
> >  # define unicrash_xattr_init(u, c, b)		(0)
> > @@ -33,6 +35,8 @@ int unicrash_check_fs_label(struct unicrash *uc, struct descr *dsc,
> >  # define unicrash_check_dir_name(u, d, n)	(0)
> >  # define unicrash_check_xattr_name(u, d, n)	(0)
> >  # define unicrash_check_fs_label(u, d, n)	(0)
> > +# define unicrash_init()			(0)
> 
> The above should probably be defining unicrash_load().

Yep, thanks for catching that.

--D

> > +# define unicrash_unload()			do { } while (0)
> >  #endif /* HAVE_LIBICU */
> >  
> >  #endif /* XFS_SCRUB_UNICRASH_H_ */
> > diff --git a/scrub/xfs_scrub.c b/scrub/xfs_scrub.c
> > index 1edeb150..6b202912 100644
> > --- a/scrub/xfs_scrub.c
> > +++ b/scrub/xfs_scrub.c
> > @@ -603,6 +603,11 @@ main(
> >  	setlocale(LC_ALL, "");
> >  	bindtextdomain(PACKAGE, LOCALEDIR);
> >  	textdomain(PACKAGE);
> > +	if (unicrash_load()) {
> > +		fprintf(stderr,
> > +			_("%s: could initialize Unicode library.\n"), progname);
> > +		goto out;
> > +	}
> >  
> >  	pthread_mutex_init(&ctx.lock, NULL);
> >  	ctx.mode = SCRUB_MODE_REPAIR;
> > @@ -788,6 +793,7 @@ main(
> >  	phase_end(&all_pi, 0);
> >  	if (progress_fp)
> >  		fclose(progress_fp);
> > +	unicrash_unload();
> >  
> >  	/*
> >  	 * If we're being run as a service, the return code must fit the LSB
> 
> 
> -- 
> chandan