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Re: [PATCH 7/9] xfs: move inode generation count to VFS inode

To: Dave Chinner <david@xxxxxxxxxxxxx>
Subject: Re: [PATCH 7/9] xfs: move inode generation count to VFS inode
From: Brian Foster <bfoster@xxxxxxxxxx>
Date: Mon, 8 Feb 2016 10:29:34 -0500
Cc: xfs@xxxxxxxxxxx
Delivered-to: xfs@xxxxxxxxxxx
In-reply-to: <1454905461-2773-8-git-send-email-david@xxxxxxxxxxxxx>
References: <1454905461-2773-1-git-send-email-david@xxxxxxxxxxxxx> <1454905461-2773-8-git-send-email-david@xxxxxxxxxxxxx>
User-agent: Mutt/1.5.24 (2015-08-30)
On Mon, Feb 08, 2016 at 03:24:19PM +1100, Dave Chinner wrote:
> From: Dave Chinner <dchinner@xxxxxxxxxx>
> 
> Pull another 4 bytes out of the xfs_icdinode.
> 
> Signed-off-by: Dave Chinner <dchinner@xxxxxxxxxx>
> ---

Reviewed-by: Brian Foster <bfoster@xxxxxxxxxx>

>  fs/xfs/libxfs/xfs_inode_buf.c | 8 ++++----
>  fs/xfs/libxfs/xfs_inode_buf.h | 1 -
>  fs/xfs/xfs_export.c           | 2 +-
>  fs/xfs/xfs_icache.c           | 2 ++
>  fs/xfs/xfs_inode.c            | 5 +----
>  fs/xfs/xfs_inode_item.c       | 2 +-
>  fs/xfs/xfs_ioctl.c            | 2 +-
>  fs/xfs/xfs_iops.c             | 1 -
>  fs/xfs/xfs_itable.c           | 2 +-
>  9 files changed, 11 insertions(+), 14 deletions(-)
> 
> diff --git a/fs/xfs/libxfs/xfs_inode_buf.c b/fs/xfs/libxfs/xfs_inode_buf.c
> index 0dcaa9a..0a3f10b 100644
> --- a/fs/xfs/libxfs/xfs_inode_buf.c
> +++ b/fs/xfs/libxfs/xfs_inode_buf.c
> @@ -237,6 +237,7 @@ xfs_inode_from_disk(
>       inode->i_mtime.tv_nsec = (int)be32_to_cpu(from->di_mtime.t_nsec);
>       inode->i_ctime.tv_sec = (int)be32_to_cpu(from->di_ctime.t_sec);
>       inode->i_ctime.tv_nsec = (int)be32_to_cpu(from->di_ctime.t_nsec);
> +     inode->i_generation = be32_to_cpu(from->di_gen);
>  
>       to->di_size = be64_to_cpu(from->di_size);
>       to->di_nblocks = be64_to_cpu(from->di_nblocks);
> @@ -248,7 +249,6 @@ xfs_inode_from_disk(
>       to->di_dmevmask = be32_to_cpu(from->di_dmevmask);
>       to->di_dmstate  = be16_to_cpu(from->di_dmstate);
>       to->di_flags    = be16_to_cpu(from->di_flags);
> -     to->di_gen      = be32_to_cpu(from->di_gen);
>  
>       if (to->di_version == 3) {
>               to->di_changecount = be64_to_cpu(from->di_changecount);
> @@ -286,6 +286,7 @@ xfs_inode_to_disk(
>       to->di_ctime.t_sec = cpu_to_be32(inode->i_ctime.tv_sec);
>       to->di_ctime.t_nsec = cpu_to_be32(inode->i_ctime.tv_nsec);
>       to->di_nlink = cpu_to_be32(inode->i_nlink);
> +     to->di_gen = cpu_to_be32(inode->i_generation);
>  
>       to->di_size = cpu_to_be64(from->di_size);
>       to->di_nblocks = cpu_to_be64(from->di_nblocks);
> @@ -297,7 +298,6 @@ xfs_inode_to_disk(
>       to->di_dmevmask = cpu_to_be32(from->di_dmevmask);
>       to->di_dmstate = cpu_to_be16(from->di_dmstate);
>       to->di_flags = cpu_to_be16(from->di_flags);
> -     to->di_gen = cpu_to_be32(from->di_gen);
>  
>       if (from->di_version == 3) {
>               to->di_changecount = cpu_to_be64(from->di_changecount);
> @@ -443,7 +443,7 @@ xfs_iread(
>           !(mp->m_flags & XFS_MOUNT_IKEEP)) {
>               /* initialise the on-disk inode core */
>               memset(&ip->i_d, 0, sizeof(ip->i_d));
> -             ip->i_d.di_gen = prandom_u32();
> +             VFS_I(ip)->i_generation = prandom_u32();
>               if (xfs_sb_version_hascrc(&mp->m_sb))
>                       ip->i_d.di_version = 3;
>               else
> @@ -491,7 +491,7 @@ xfs_iread(
>                * that xfs_ialloc won't overwrite or relies on being correct.
>                */
>               ip->i_d.di_version = dip->di_version;
> -             ip->i_d.di_gen = be32_to_cpu(dip->di_gen);
> +             VFS_I(ip)->i_generation = be32_to_cpu(dip->di_gen);
>               ip->i_d.di_flushiter = be16_to_cpu(dip->di_flushiter);
>  
>               /*
> diff --git a/fs/xfs/libxfs/xfs_inode_buf.h b/fs/xfs/libxfs/xfs_inode_buf.h
> index 320b723..29fd9f1 100644
> --- a/fs/xfs/libxfs/xfs_inode_buf.h
> +++ b/fs/xfs/libxfs/xfs_inode_buf.h
> @@ -46,7 +46,6 @@ struct xfs_icdinode {
>       __uint32_t      di_dmevmask;    /* DMIG event mask */
>       __uint16_t      di_dmstate;     /* DMIG state info */
>       __uint16_t      di_flags;       /* random flags, XFS_DIFLAG_... */
> -     __uint32_t      di_gen;         /* generation number */
>  
>       __uint64_t      di_changecount; /* number of attribute changes */
>       __uint64_t      di_flags2;      /* more random flags */
> diff --git a/fs/xfs/xfs_export.c b/fs/xfs/xfs_export.c
> index 652cd3c..2816d42 100644
> --- a/fs/xfs/xfs_export.c
> +++ b/fs/xfs/xfs_export.c
> @@ -152,7 +152,7 @@ xfs_nfs_get_inode(
>               return ERR_PTR(error);
>       }
>  
> -     if (ip->i_d.di_gen != generation) {
> +     if (VFS_I(ip)->i_generation != generation) {
>               IRELE(ip);
>               return ERR_PTR(-ESTALE);
>       }
> diff --git a/fs/xfs/xfs_icache.c b/fs/xfs/xfs_icache.c
> index 4c184f7..6401e3c 100644
> --- a/fs/xfs/xfs_icache.c
> +++ b/fs/xfs/xfs_icache.c
> @@ -149,10 +149,12 @@ xfs_reinit_inode(
>  {
>       int             error;
>       uint32_t        nlink = inode->i_nlink;
> +     uint32_t        generation = inode->i_generation;
>  
>       error = inode_init_always(mp->m_super, inode);
>  
>       set_nlink(inode, nlink);
> +     inode->i_generation = generation;
>       return error;
>  }
>  
> diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
> index ed8e3d2..e8f87c7 100644
> --- a/fs/xfs/xfs_inode.c
> +++ b/fs/xfs/xfs_inode.c
> @@ -835,9 +835,6 @@ xfs_ialloc(
>       inode->i_atime = tv;
>       inode->i_ctime = tv;
>  
> -     /*
> -      * di_gen will have been taken care of in xfs_iread.
> -      */
>       ip->i_d.di_extsize = 0;
>       ip->i_d.di_dmevmask = 0;
>       ip->i_d.di_dmstate = 0;
> @@ -2428,7 +2425,7 @@ xfs_ifree(
>        * Bump the generation count so no one will be confused
>        * by reincarnations of this inode.
>        */
> -     ip->i_d.di_gen++;
> +     VFS_I(ip)->i_generation++;
>       xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
>  
>       if (xic.deleted)
> diff --git a/fs/xfs/xfs_inode_item.c b/fs/xfs/xfs_inode_item.c
> index 193e0bd..6367780 100644
> --- a/fs/xfs/xfs_inode_item.c
> +++ b/fs/xfs/xfs_inode_item.c
> @@ -350,6 +350,7 @@ xfs_inode_to_log_dinode(
>       to->di_ctime.t_sec = inode->i_ctime.tv_sec;
>       to->di_ctime.t_nsec = inode->i_ctime.tv_nsec;
>       to->di_nlink = inode->i_nlink;
> +     to->di_gen = inode->i_generation;
>  
>       to->di_size = from->di_size;
>       to->di_nblocks = from->di_nblocks;
> @@ -361,7 +362,6 @@ xfs_inode_to_log_dinode(
>       to->di_dmevmask = from->di_dmevmask;
>       to->di_dmstate = from->di_dmstate;
>       to->di_flags = from->di_flags;
> -     to->di_gen = from->di_gen;
>  
>       if (from->di_version == 3) {
>               to->di_changecount = from->di_changecount;
> diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
> index 478d04e..cdd6c31 100644
> --- a/fs/xfs/xfs_ioctl.c
> +++ b/fs/xfs/xfs_ioctl.c
> @@ -114,7 +114,7 @@ xfs_find_handle(
>               handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
>                                       sizeof(handle.ha_fid.fid_len);
>               handle.ha_fid.fid_pad = 0;
> -             handle.ha_fid.fid_gen = ip->i_d.di_gen;
> +             handle.ha_fid.fid_gen = inode->i_generation;
>               handle.ha_fid.fid_ino = ip->i_ino;
>  
>               hsize = XFS_HSIZE(handle);
> diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c
> index 8982e56..a4daa3f 100644
> --- a/fs/xfs/xfs_iops.c
> +++ b/fs/xfs/xfs_iops.c
> @@ -1231,7 +1231,6 @@ xfs_setup_inode(
>               break;
>       }
>  
> -     inode->i_generation = ip->i_d.di_gen;
>       i_size_write(inode, ip->i_d.di_size);
>       xfs_diflags_to_iflags(inode, ip);
>  
> diff --git a/fs/xfs/xfs_itable.c b/fs/xfs/xfs_itable.c
> index cfb6527..6162e65 100644
> --- a/fs/xfs/xfs_itable.c
> +++ b/fs/xfs/xfs_itable.c
> @@ -100,11 +100,11 @@ xfs_bulkstat_one_int(
>       buf->bs_mtime.tv_nsec = inode->i_mtime.tv_nsec;
>       buf->bs_ctime.tv_sec = inode->i_ctime.tv_sec;
>       buf->bs_ctime.tv_nsec = inode->i_ctime.tv_nsec;
> +     buf->bs_gen = inode->i_generation;
>  
>       buf->bs_xflags = xfs_ip2xflags(ip);
>       buf->bs_extsize = dic->di_extsize << mp->m_sb.sb_blocklog;
>       buf->bs_extents = dic->di_nextents;
> -     buf->bs_gen = dic->di_gen;
>       memset(buf->bs_pad, 0, sizeof(buf->bs_pad));
>       buf->bs_dmevmask = dic->di_dmevmask;
>       buf->bs_dmstate = dic->di_dmstate;
> -- 
> 2.5.0
> 
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