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From: Dave Chinner <david@fromorbit.com>
To: xfs@oss.sgi.com
Subject: [PATCH 4/8] xfs: move v1 inode conversion to xfs_inode_from_disk
Date: Tue, 12 Jan 2016 20:01:16 +1100	[thread overview]
Message-ID: <1452589280-30167-5-git-send-email-david@fromorbit.com> (raw)
In-Reply-To: <1452589280-30167-1-git-send-email-david@fromorbit.com>

From: Dave Chinner <dchinner@redhat.com>

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@redhat.com>
---
 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 920aeef..a3e79a9 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);
 
 	inode->i_atime.tv_sec = be32_to_cpu(from->di_atime.t_sec);
@@ -250,11 +262,11 @@ 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);
@@ -304,9 +316,9 @@ 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);
@@ -486,21 +498,7 @@ 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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  parent reply	other threads:[~2016-01-12  9:01 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-01-12  9:01 [RFC PATCH 0/8] xfs: shrink the struct xfs_icdinode Dave Chinner
2016-01-12  9:01 ` [PATCH 1/8] xfs: introduce inode log format object Dave Chinner
2016-01-12  9:01 ` [PATCH 2/8] xfs: remove timestamps from incore inode Dave Chinner
2016-01-12  9:01 ` [PATCH 3/8] xfs; cull unnecessary icdinode fields Dave Chinner
2016-01-12  9:01 ` Dave Chinner [this message]
2016-01-12  9:01 ` [PATCH 5/8] xfs: use vfs inode nlink field everywhere Dave Chinner
2016-01-12  9:01 ` [PATCH 6/8] xfs: move inode generation count to VFS inode Dave Chinner
2016-01-12  9:01 ` [PATCH 7/8] xfs: move di_changecount " Dave Chinner
2016-01-12  9:01 ` [PATCH 8/8] xfs: mode di_mode to vfs inode Dave Chinner
2016-01-12 15:30 ` [RFC PATCH 0/8] xfs: shrink the struct xfs_icdinode Christoph Hellwig
2016-01-12 21:05   ` Dave Chinner
2016-01-14  6:09 [PATCH v2 0/8] xfs: shrink the xfs_icdinode Dave Chinner
2016-01-14  6:09 ` [PATCH 4/8] xfs: move v1 inode conversion to xfs_inode_from_disk Dave Chinner
2016-01-25 15:43   ` Brian Foster

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