linux-ext4 - Re: [PATCH 06/25] libext2fs: fix tests that set LARGE

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Date:	Mon, 25 Nov 2013 09:57:28 -0800
From:	"Darrick J. Wong" <darrick.wong@...cle.com>
To:	tytso@....edu, linux-ext4@...r.kernel.org
Subject: Re: [PATCH 06/25] libext2fs: fix tests that set LARGE_FILE

On Mon, Nov 25, 2013 at 03:09:02PM +0800, Zheng Liu wrote:
> On Thu, Oct 17, 2013 at 09:49:35PM -0700, Darrick J. Wong wrote:
> > For each site where we test for a large file (> 2GB) and set the
> > LARGE_FILE feature, use a helper function to make the size test
> > consistent with the test that's in e2fsck.  This fixes the fsck
> > complaints when we try to create a 2GB journal (not so hard with 64k
> > block size) and fixes the incorrect test in fileio.c.
> > 
> > Signed-off-by: Darrick J. Wong <darrick.wong@...cle.com>
> 
> In e2fsck/pass2.c there is also a place that needs to be fixed.
> Otherwise the patch looks good to me.
> Reviewed-by: Zheng Liu <wenqing.lz@...bao.com>
> 
>                                                 - Zheng
> 
> diff --git a/e2fsck/pass2.c b/e2fsck/pass2.c
> index 3c0bf49..66ed665 100644
> --- a/e2fsck/pass2.c
> +++ b/e2fsck/pass2.c
> @@ -1318,7 +1318,8 @@ static void deallocate_inode(e2fsck_t ctx, ext2_ino_t ino, char* block_buf)
>  	if (!ext2fs_inode_has_valid_blocks2(fs, &inode))
>  		goto clear_inode;
>  
> -	if (LINUX_S_ISREG(inode.i_mode) && EXT2_I_SIZE(&inode) >= 0x80000000UL)
> +	if (LINUX_S_ISREG(inode.i_mode) &&
> +	    ext2fs_needs_large_file_feature(EXT2_I_SIZE(&inode)))
>  		ctx->large_files--;
>  
>  	del_block.ctx = ctx;

Good catch!  Thank you; I'll update the patch.

--D
> 
> > ---
> >  e2fsck/pass1.c         |    3 ++-
> >  lib/ext2fs/ext2fs.h    |    6 ++++++
> >  lib/ext2fs/fileio.c    |    2 +-
> >  lib/ext2fs/mkjournal.c |    2 +-
> >  4 files changed, 10 insertions(+), 3 deletions(-)
> > 
> > 
> > diff --git a/e2fsck/pass1.c b/e2fsck/pass1.c
> > index ab23e42..8c18a93 100644
> > --- a/e2fsck/pass1.c
> > +++ b/e2fsck/pass1.c
> > @@ -2281,7 +2281,8 @@ static void check_blocks(e2fsck_t ctx, struct problem_context *pctx,
> >  		}
> >  		pctx->num = 0;
> >  	}
> > -	if (LINUX_S_ISREG(inode->i_mode) && EXT2_I_SIZE(inode) >= 0x80000000UL)
> > +	if (LINUX_S_ISREG(inode->i_mode) &&
> > +	    ext2fs_needs_large_file_feature(EXT2_I_SIZE(inode)))
> >  		ctx->large_files++;
> >  	if ((pb.num_blocks != ext2fs_inode_i_blocks(fs, inode)) ||
> >  	    ((fs->super->s_feature_ro_compat &
> > diff --git a/lib/ext2fs/ext2fs.h b/lib/ext2fs/ext2fs.h
> > index 1ef4d67..8f82dae 100644
> > --- a/lib/ext2fs/ext2fs.h
> > +++ b/lib/ext2fs/ext2fs.h
> > @@ -646,6 +646,12 @@ static inline int ext2fs_has_group_desc_csum(ext2_filsys fs)
> >  			EXT4_FEATURE_RO_COMPAT_METADATA_CSUM);
> >  }
> >  
> > +/* The LARGE_FILE feature should be set if we have stored files 2GB+ in size */
> > +static inline int ext2fs_needs_large_file_feature(unsigned long long file_size)
> > +{
> > +	return file_size >= 0x80000000ULL;
> > +}
> > +
> >  /* alloc.c */
> >  extern errcode_t ext2fs_new_inode(ext2_filsys fs, ext2_ino_t dir, int mode,
> >  				  ext2fs_inode_bitmap map, ext2_ino_t *ret);
> > diff --git a/lib/ext2fs/fileio.c b/lib/ext2fs/fileio.c
> > index 02e6263..6b213b5 100644
> > --- a/lib/ext2fs/fileio.c
> > +++ b/lib/ext2fs/fileio.c
> > @@ -400,7 +400,7 @@ errcode_t ext2fs_file_set_size2(ext2_file_t file, ext2_off64_t size)
> >  
> >  	/* If we're writing a large file, set the large_file flag */
> >  	if (LINUX_S_ISREG(file->inode.i_mode) &&
> > -	    EXT2_I_SIZE(&file->inode) > 0x7FFFFFFULL &&
> > +	    ext2fs_needs_large_file_feature(EXT2_I_SIZE(&file->inode)) &&
> >  	    (!EXT2_HAS_RO_COMPAT_FEATURE(file->fs->super,
> >  					 EXT2_FEATURE_RO_COMPAT_LARGE_FILE) ||
> >  	     file->fs->super->s_rev_level == EXT2_GOOD_OLD_REV)) {
> > diff --git a/lib/ext2fs/mkjournal.c b/lib/ext2fs/mkjournal.c
> > index c636a97..2afd3b7 100644
> > --- a/lib/ext2fs/mkjournal.c
> > +++ b/lib/ext2fs/mkjournal.c
> > @@ -378,7 +378,7 @@ static errcode_t write_journal_inode(ext2_filsys fs, ext2_ino_t journal_ino,
> >  	inode_size = (unsigned long long)fs->blocksize * num_blocks;
> >  	inode.i_size = inode_size & 0xFFFFFFFF;
> >  	inode.i_size_high = (inode_size >> 32) & 0xFFFFFFFF;
> > -	if (inode.i_size_high)
> > +	if (ext2fs_needs_large_file_feature(inode_size))
> >  		fs->super->s_feature_ro_compat |=
> >  			EXT2_FEATURE_RO_COMPAT_LARGE_FILE;
> >  	ext2fs_iblk_add_blocks(fs, &inode, es.newblocks);
> > 
> > --
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