On Thu, Jan 14, 2016 at 05:09:21PM +1100, Dave Chinner wrote:
> From: Dave Chinner <dchinner@xxxxxxxxxx>
>
> So we don't have to carry an di_onlink variable around anymore, move
> the inode conversion from v1 inode format to v2 inode format into
> xfs_inode_from_disk(). This means we can remove the di_onlink fields
> from the struct xfs_icdinode.
>
> Signed-off-by: Dave Chinner <dchinner@xxxxxxxxxx>
> ---
Reviewed-by: Brian Foster <bfoster@xxxxxxxxxx>
> fs/xfs/libxfs/xfs_inode_buf.c | 42 ++++++++++++++++++++----------------------
> fs/xfs/libxfs/xfs_inode_buf.h | 1 -
> fs/xfs/libxfs/xfs_log_format.h | 2 +-
> fs/xfs/xfs_inode.c | 2 --
> fs/xfs/xfs_inode_item.c | 2 +-
> 5 files changed, 22 insertions(+), 27 deletions(-)
>
> diff --git a/fs/xfs/libxfs/xfs_inode_buf.c b/fs/xfs/libxfs/xfs_inode_buf.c
> index 17ff4e8..8a1b460 100644
> --- a/fs/xfs/libxfs/xfs_inode_buf.c
> +++ b/fs/xfs/libxfs/xfs_inode_buf.c
> @@ -204,13 +204,25 @@ xfs_inode_from_disk(
>
> to->di_mode = be16_to_cpu(from->di_mode);
> to->di_version = from ->di_version;
> +
> + /*
> + * Convert v1 inodes immediately to v2 inode format as this is the
> + * minimum inode version format we support in the rest of the code.
> + */
> + if (to->di_version == 1) {
> + to->di_nlink = be16_to_cpu(from->di_onlink);
> + to->di_projid_lo = 0;
> + to->di_projid_hi = 0;
> + to->di_version = 2;
> + } else {
> + to->di_nlink = be32_to_cpu(from->di_nlink);
> + to->di_projid_lo = be16_to_cpu(from->di_projid_lo);
> + to->di_projid_hi = be16_to_cpu(from->di_projid_hi);
> + }
> +
> to->di_format = from->di_format;
> - to->di_onlink = be16_to_cpu(from->di_onlink);
> to->di_uid = be32_to_cpu(from->di_uid);
> to->di_gid = be32_to_cpu(from->di_gid);
> - to->di_nlink = be32_to_cpu(from->di_nlink);
> - to->di_projid_lo = be16_to_cpu(from->di_projid_lo);
> - to->di_projid_hi = be16_to_cpu(from->di_projid_hi);
> to->di_flushiter = be16_to_cpu(from->di_flushiter);
>
> /*
> @@ -256,11 +268,11 @@ xfs_inode_to_disk(
> struct inode *inode = VFS_I(ip);
>
> to->di_magic = cpu_to_be16(XFS_DINODE_MAGIC);
> + to->di_onlink = 0;
>
> to->di_mode = cpu_to_be16(from->di_mode);
> to->di_version = from->di_version;
> to->di_format = from->di_format;
> - to->di_onlink = cpu_to_be16(from->di_onlink);
> to->di_uid = cpu_to_be32(from->di_uid);
> to->di_gid = cpu_to_be32(from->di_gid);
> to->di_nlink = cpu_to_be32(from->di_nlink);
> @@ -310,9 +322,9 @@ xfs_log_dinode_to_disk(
> {
> to->di_magic = cpu_to_be16(from->di_magic);
> to->di_mode = cpu_to_be16(from->di_mode);
> - to->di_version = from ->di_version;
> + to->di_version = from->di_version;
> to->di_format = from->di_format;
> - to->di_onlink = cpu_to_be16(from->di_onlink);
> + to->di_onlink = 0;
> to->di_uid = cpu_to_be32(from->di_uid);
> to->di_gid = cpu_to_be32(from->di_gid);
> to->di_nlink = cpu_to_be32(from->di_nlink);
> @@ -492,21 +504,7 @@ xfs_iread(
> ip->i_d.di_mode = 0;
> }
>
> - /*
> - * Automatically convert version 1 inode formats in memory to version 2
> - * inode format. If the inode is modified, it will get logged and
> - * rewritten as a version 2 inode. We can do this because we set the
> - * superblock feature bit for v2 inodes unconditionally during mount
> - * and it means the reast of the code can assume the inode version is 2
> - * or higher.
> - */
> - if (ip->i_d.di_version == 1) {
> - ip->i_d.di_version = 2;
> - ip->i_d.di_nlink = ip->i_d.di_onlink;
> - ip->i_d.di_onlink = 0;
> - xfs_set_projid(ip, 0);
> - }
> -
> + ASSERT(ip->i_d.di_version >= 2);
> ip->i_delayed_blks = 0;
>
> /*
> diff --git a/fs/xfs/libxfs/xfs_inode_buf.h b/fs/xfs/libxfs/xfs_inode_buf.h
> index 69d626e..feb04e6 100644
> --- a/fs/xfs/libxfs/xfs_inode_buf.h
> +++ b/fs/xfs/libxfs/xfs_inode_buf.h
> @@ -31,7 +31,6 @@ struct xfs_icdinode {
> __uint16_t di_mode; /* mode and type of file */
> __int8_t di_version; /* inode version */
> __int8_t di_format; /* format of di_c data */
> - __uint16_t di_onlink; /* old number of links to file */
> __uint16_t di_flushiter; /* incremented on flush */
> __uint32_t di_uid; /* owner's user id */
> __uint32_t di_gid; /* owner's group id */
> diff --git a/fs/xfs/libxfs/xfs_log_format.h b/fs/xfs/libxfs/xfs_log_format.h
> index d00ed63..03f90b9 100644
> --- a/fs/xfs/libxfs/xfs_log_format.h
> +++ b/fs/xfs/libxfs/xfs_log_format.h
> @@ -369,7 +369,7 @@ struct xfs_log_dinode {
> __uint16_t di_mode; /* mode and type of file */
> __int8_t di_version; /* inode version */
> __int8_t di_format; /* format of di_c data */
> - __uint16_t di_onlink; /* old number of links to file */
> + __uint8_t di_pad3[2]; /* unused in v2/3 inodes */
> __uint32_t di_uid; /* owner's user id */
> __uint32_t di_gid; /* owner's group id */
> __uint32_t di_nlink; /* number of links to file */
> diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
> index 3f020b5..914ec41 100644
> --- a/fs/xfs/xfs_inode.c
> +++ b/fs/xfs/xfs_inode.c
> @@ -794,9 +794,7 @@ xfs_ialloc(
> ip->i_d.di_version = 2;
>
> ip->i_d.di_mode = mode;
> - ip->i_d.di_onlink = 0;
> ip->i_d.di_nlink = nlink;
> - ASSERT(ip->i_d.di_nlink == nlink);
> ip->i_d.di_uid = xfs_kuid_to_uid(current_fsuid());
> ip->i_d.di_gid = xfs_kgid_to_gid(current_fsgid());
> xfs_set_projid(ip, prid);
> diff --git a/fs/xfs/xfs_inode_item.c b/fs/xfs/xfs_inode_item.c
> index ae60087..d777b7a 100644
> --- a/fs/xfs/xfs_inode_item.c
> +++ b/fs/xfs/xfs_inode_item.c
> @@ -336,7 +336,6 @@ xfs_inode_to_log_dinode(
> to->di_mode = from->di_mode;
> to->di_version = from->di_version;
> to->di_format = from->di_format;
> - to->di_onlink = from->di_onlink;
> to->di_uid = from->di_uid;
> to->di_gid = from->di_gid;
> to->di_nlink = from->di_nlink;
> @@ -344,6 +343,7 @@ xfs_inode_to_log_dinode(
> to->di_projid_hi = from->di_projid_hi;
>
> memset(to->di_pad, 0, sizeof(to->di_pad));
> + memset(to->di_pad3, 0, sizeof(to->di_pad3));
> to->di_atime.t_sec = inode->i_atime.tv_sec;
> to->di_atime.t_nsec = inode->i_atime.tv_nsec;
> to->di_mtime.t_sec = inode->i_mtime.tv_sec;
> --
> 2.5.0
>
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