linux-kernel - Re: [RFC 25/32] gfs2: convert to struct inode

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Date:	Mon, 02 Jun 2014 10:52:44 +0100
From:	Steven Whitehouse <swhiteho@...hat.com>
To:	Arnd Bergmann <arnd@...db.de>, linux-kernel@...r.kernel.org
CC:	linux-arch@...r.kernel.org, joseph@...esourcery.com,
	john.stultz@...aro.org, hch@...radead.org, tglx@...utronix.de,
	geert@...ux-m68k.org, lftan@...era.com, hpa@...or.com,
	linux-fsdevel@...r.kernel.org, cluster-devel@...hat.com
Subject: Re: [RFC 25/32] gfs2: convert to struct inode_time

Hi,

On 30/05/14 21:01, Arnd Bergmann wrote:
> gfs2 uses 64-bit integers for inode timestamps, which will work
> basically forever, but the VFS uses struct timespec for timestamps,
> which is only good until 2038 on 32-bit CPUs.
>
> This gets us one small step closer to lifting the VFS limit by using
> struct inode_time in gfs2.
>
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> Cc: Steven Whitehouse <swhiteho@...hat.com>
> Cc: cluster-devel@...hat.com
> ---
>   fs/gfs2/dir.c   | 6 +++---
>   fs/gfs2/glops.c | 4 ++--
>   2 files changed, 5 insertions(+), 5 deletions(-)
Subject to deciding the internal representation of struct inode_time, 
this looks good to me.
Acked-by: Steven Whitehouse <swhiteho@...hat.com>

Steve.
> diff --git a/fs/gfs2/dir.c b/fs/gfs2/dir.c
> index 1a349f9..ec57538 100644
> --- a/fs/gfs2/dir.c
> +++ b/fs/gfs2/dir.c
> @@ -835,7 +835,7 @@ static struct gfs2_leaf *new_leaf(struct inode *inode, struct buffer_head **pbh,
>   	struct gfs2_leaf *leaf;
>   	struct gfs2_dirent *dent;
>   	struct qstr name = { .name = "" };
> -	struct timespec tv = CURRENT_TIME;
> +	struct inode_time tv = CURRENT_TIME;
>   
>   	error = gfs2_alloc_blocks(ip, &bn, &n, 0, NULL);
>   	if (error)
> @@ -1716,7 +1716,7 @@ int gfs2_dir_add(struct inode *inode, const struct qstr *name,
>   	struct gfs2_inode *ip = GFS2_I(inode);
>   	struct buffer_head *bh = da->bh;
>   	struct gfs2_dirent *dent = da->dent;
> -	struct timespec tv;
> +	struct inode_time tv;
>   	struct gfs2_leaf *leaf;
>   	int error;
>   
> @@ -1794,7 +1794,7 @@ int gfs2_dir_del(struct gfs2_inode *dip, const struct dentry *dentry)
>   	const struct qstr *name = &dentry->d_name;
>   	struct gfs2_dirent *dent, *prev = NULL;
>   	struct buffer_head *bh;
> -	struct timespec tv = CURRENT_TIME;
> +	struct inode_time tv = CURRENT_TIME;
>   
>   	/* Returns _either_ the entry (if its first in block) or the
>   	   previous entry otherwise */
> diff --git a/fs/gfs2/glops.c b/fs/gfs2/glops.c
> index fc11007..b55308f 100644
> --- a/fs/gfs2/glops.c
> +++ b/fs/gfs2/glops.c
> @@ -318,7 +318,7 @@ static void gfs2_set_nlink(struct inode *inode, u32 nlink)
>   static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf)
>   {
>   	const struct gfs2_dinode *str = buf;
> -	struct timespec atime;
> +	struct inode_time atime;
>   	u16 height, depth;
>   
>   	if (unlikely(ip->i_no_addr != be64_to_cpu(str->di_num.no_addr)))
> @@ -341,7 +341,7 @@ static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf)
>   	gfs2_set_inode_blocks(&ip->i_inode, be64_to_cpu(str->di_blocks));
>   	atime.tv_sec = be64_to_cpu(str->di_atime);
>   	atime.tv_nsec = be32_to_cpu(str->di_atime_nsec);
> -	if (timespec_compare(&ip->i_inode.i_atime, &atime) < 0)
> +	if (inode_time_compare(&ip->i_inode.i_atime, &atime) < 0)
>   		ip->i_inode.i_atime = atime;
>   	ip->i_inode.i_mtime.tv_sec = be64_to_cpu(str->di_mtime);
>   	ip->i_inode.i_mtime.tv_nsec = be32_to_cpu(str->di_mtime_nsec);

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