[XFS] kill xfs_dinode_core_t

Now that we have a separate xfs_icdinode_t for the in-core inode which
gets logged there is no need anymore for the xfs_dinode vs xfs_dinode_core
split - the fact that part of the structure gets logged through the inode
log item and a small part not can better be described in a comment.

All sizeof operations on the dinode_core either really wanted the
icdinode and are switched to that one, or had already added the size
of the agi unlinked list pointer.  Later both will be replaced with
helpers once we get the larger CRC-enabled dinode.

Removing the data and attribute fork unions also has the advantage that
xfs_dinode.h doesn't need to pull in every header under the sun.

While we're at it also add some more comments describing the dinode
structure.

(First sent on October 7th)

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <david@fromorbit.com>
Signed-off-by: Niv Sardi <xaiki@sgi.com>

1 files changed, 42 insertions, 43 deletions

diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index 46b0526..1d2912d 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -174,8 +174,8 @@ xfs_imap_to_bp(
 
 		dip = (xfs_dinode_t *)xfs_buf_offset(bp,
 					(i << mp->m_sb.sb_inodelog));
-		di_ok = be16_to_cpu(dip->di_core.di_magic) == XFS_DINODE_MAGIC &&
-			    XFS_DINODE_GOOD_VERSION(dip->di_core.di_version);
+		di_ok = be16_to_cpu(dip->di_magic) == XFS_DINODE_MAGIC &&
+			    XFS_DINODE_GOOD_VERSION(dip->di_version);
 		if (unlikely(XFS_TEST_ERROR(!di_ok, mp,
 						XFS_ERRTAG_ITOBP_INOTOBP,
 						XFS_RANDOM_ITOBP_INOTOBP))) {
@@ -191,7 +191,7 @@ xfs_imap_to_bp(
 					"daddr %lld #%d (magic=%x)",
 				XFS_BUFTARG_NAME(mp->m_ddev_targp),
 				(unsigned long long)imap->im_blkno, i,
-				be16_to_cpu(dip->di_core.di_magic));
+				be16_to_cpu(dip->di_magic));
 #endif
 			xfs_trans_brelse(tp, bp);
 			return XFS_ERROR(EFSCORRUPTED);
@@ -350,26 +350,26 @@ xfs_iformat(
 		XFS_IFORK_DSIZE(ip) / (uint)sizeof(xfs_bmbt_rec_t);
 	error = 0;
 
-	if (unlikely(be32_to_cpu(dip->di_core.di_nextents) +
-		     be16_to_cpu(dip->di_core.di_anextents) >
-		     be64_to_cpu(dip->di_core.di_nblocks))) {
+	if (unlikely(be32_to_cpu(dip->di_nextents) +
+		     be16_to_cpu(dip->di_anextents) >
+		     be64_to_cpu(dip->di_nblocks))) {
 		xfs_fs_repair_cmn_err(CE_WARN, ip->i_mount,
 			"corrupt dinode %Lu, extent total = %d, nblocks = %Lu.",
 			(unsigned long long)ip->i_ino,
-			(int)(be32_to_cpu(dip->di_core.di_nextents) +
-			      be16_to_cpu(dip->di_core.di_anextents)),
+			(int)(be32_to_cpu(dip->di_nextents) +
+			      be16_to_cpu(dip->di_anextents)),
 			(unsigned long long)
-				be64_to_cpu(dip->di_core.di_nblocks));
+				be64_to_cpu(dip->di_nblocks));
 		XFS_CORRUPTION_ERROR("xfs_iformat(1)", XFS_ERRLEVEL_LOW,
 				     ip->i_mount, dip);
 		return XFS_ERROR(EFSCORRUPTED);
 	}
 
-	if (unlikely(dip->di_core.di_forkoff > ip->i_mount->m_sb.sb_inodesize)) {
+	if (unlikely(dip->di_forkoff > ip->i_mount->m_sb.sb_inodesize)) {
 		xfs_fs_repair_cmn_err(CE_WARN, ip->i_mount,
 			"corrupt dinode %Lu, forkoff = 0x%x.",
 			(unsigned long long)ip->i_ino,
-			dip->di_core.di_forkoff);
+			dip->di_forkoff);
 		XFS_CORRUPTION_ERROR("xfs_iformat(2)", XFS_ERRLEVEL_LOW,
 				     ip->i_mount, dip);
 		return XFS_ERROR(EFSCORRUPTED);
@@ -380,25 +380,25 @@ xfs_iformat(
 	case S_IFCHR:
 	case S_IFBLK:
 	case S_IFSOCK:
-		if (unlikely(dip->di_core.di_format != XFS_DINODE_FMT_DEV)) {
+		if (unlikely(dip->di_format != XFS_DINODE_FMT_DEV)) {
 			XFS_CORRUPTION_ERROR("xfs_iformat(3)", XFS_ERRLEVEL_LOW,
 					      ip->i_mount, dip);
 			return XFS_ERROR(EFSCORRUPTED);
 		}
 		ip->i_d.di_size = 0;
 		ip->i_size = 0;
-		ip->i_df.if_u2.if_rdev = be32_to_cpu(dip->di_u.di_dev);
+		ip->i_df.if_u2.if_rdev = xfs_dinode_get_rdev(dip);
 		break;
 
 	case S_IFREG:
 	case S_IFLNK:
 	case S_IFDIR:
-		switch (dip->di_core.di_format) {
+		switch (dip->di_format) {
 		case XFS_DINODE_FMT_LOCAL:
 			/*
 			 * no local regular files yet
 			 */
-			if (unlikely((be16_to_cpu(dip->di_core.di_mode) & S_IFMT) == S_IFREG)) {
+			if (unlikely((be16_to_cpu(dip->di_mode) & S_IFMT) == S_IFREG)) {
 				xfs_fs_repair_cmn_err(CE_WARN, ip->i_mount,
 					"corrupt inode %Lu "
 					"(local format for regular file).",
@@ -409,7 +409,7 @@ xfs_iformat(
 				return XFS_ERROR(EFSCORRUPTED);
 			}
 
-			di_size = be64_to_cpu(dip->di_core.di_size);
+			di_size = be64_to_cpu(dip->di_size);
 			if (unlikely(di_size > XFS_DFORK_DSIZE(dip, ip->i_mount))) {
 				xfs_fs_repair_cmn_err(CE_WARN, ip->i_mount,
 					"corrupt inode %Lu "
@@ -451,7 +451,7 @@ xfs_iformat(
 	ip->i_afp = kmem_zone_zalloc(xfs_ifork_zone, KM_SLEEP);
 	ip->i_afp->if_ext_max =
 		XFS_IFORK_ASIZE(ip) / (uint)sizeof(xfs_bmbt_rec_t);
-	switch (dip->di_core.di_aformat) {
+	switch (dip->di_aformat) {
 	case XFS_DINODE_FMT_LOCAL:
 		atp = (xfs_attr_shortform_t *)XFS_DFORK_APTR(dip);
 		size = be16_to_cpu(atp->hdr.totsize);
@@ -663,7 +663,7 @@ xfs_iformat_btree(
 void
 xfs_dinode_from_disk(
 	xfs_icdinode_t		*to,
-	xfs_dinode_core_t	*from)
+	xfs_dinode_t		*from)
 {
 	to->di_magic = be16_to_cpu(from->di_magic);
 	to->di_mode = be16_to_cpu(from->di_mode);
@@ -697,7 +697,7 @@ xfs_dinode_from_disk(
 
 void
 xfs_dinode_to_disk(
-	xfs_dinode_core_t	*to,
+	xfs_dinode_t		*to,
 	xfs_icdinode_t		*from)
 {
 	to->di_magic = cpu_to_be16(from->di_magic);
@@ -784,9 +784,7 @@ uint
 xfs_dic2xflags(
 	xfs_dinode_t		*dip)
 {
-	xfs_dinode_core_t	*dic = &dip->di_core;
-
-	return _xfs_dic2xflags(be16_to_cpu(dic->di_flags)) |
+	return _xfs_dic2xflags(be16_to_cpu(dip->di_flags)) |
 				(XFS_DFORK_Q(dip) ? XFS_XFLAG_HASATTR : 0);
 }
 
@@ -905,12 +903,12 @@ xfs_iread(
 	 * If we got something that isn't an inode it means someone
 	 * (nfs or dmi) has a stale handle.
 	 */
-	if (be16_to_cpu(dip->di_core.di_magic) != XFS_DINODE_MAGIC) {
+	if (be16_to_cpu(dip->di_magic) != XFS_DINODE_MAGIC) {
 #ifdef DEBUG
 		xfs_fs_cmn_err(CE_ALERT, mp, "xfs_iread: "
-				"dip->di_core.di_magic (0x%x) != "
+				"dip->di_magic (0x%x) != "
 				"XFS_DINODE_MAGIC (0x%x)",
-				be16_to_cpu(dip->di_core.di_magic),
+				be16_to_cpu(dip->di_magic),
 				XFS_DINODE_MAGIC);
 #endif /* DEBUG */
 		error = XFS_ERROR(EINVAL);
@@ -924,8 +922,8 @@ xfs_iread(
 	 * specific information.
 	 * Otherwise, just get the truly permanent information.
 	 */
-	if (dip->di_core.di_mode) {
-		xfs_dinode_from_disk(&ip->i_d, &dip->di_core);
+	if (dip->di_mode) {
+		xfs_dinode_from_disk(&ip->i_d, dip);
 		error = xfs_iformat(ip, dip);
 		if (error)  {
 #ifdef DEBUG
@@ -936,10 +934,10 @@ xfs_iread(
 			goto out_brelse;
 		}
 	} else {
-		ip->i_d.di_magic = be16_to_cpu(dip->di_core.di_magic);
-		ip->i_d.di_version = dip->di_core.di_version;
-		ip->i_d.di_gen = be32_to_cpu(dip->di_core.di_gen);
-		ip->i_d.di_flushiter = be16_to_cpu(dip->di_core.di_flushiter);
+		ip->i_d.di_magic = be16_to_cpu(dip->di_magic);
+		ip->i_d.di_version = dip->di_version;
+		ip->i_d.di_gen = be32_to_cpu(dip->di_gen);
+		ip->i_d.di_flushiter = be16_to_cpu(dip->di_flushiter);
 		/*
 		 * Make sure to pull in the mode here as well in
 		 * case the inode is released without being used.
@@ -2295,7 +2293,7 @@ xfs_ifree(
 	* This is a temporary hack that would require a proper fix
 	* in the future.
 	*/
-	dip->di_core.di_mode = 0;
+	dip->di_mode = 0;
 
 	if (delete) {
 		xfs_ifree_cluster(ip, tp, first_ino);
@@ -2909,15 +2907,16 @@ xfs_iflush_fork(
 	case XFS_DINODE_FMT_DEV:
 		if (iip->ili_format.ilf_fields & XFS_ILOG_DEV) {
 			ASSERT(whichfork == XFS_DATA_FORK);
-			dip->di_u.di_dev = cpu_to_be32(ip->i_df.if_u2.if_rdev);
+			xfs_dinode_put_rdev(dip, ip->i_df.if_u2.if_rdev);
 		}
 		break;
 
 	case XFS_DINODE_FMT_UUID:
 		if (iip->ili_format.ilf_fields & XFS_ILOG_UUID) {
 			ASSERT(whichfork == XFS_DATA_FORK);
-			memcpy(&dip->di_u.di_muuid, &ip->i_df.if_u2.if_uuid,
-				sizeof(uuid_t));
+			memcpy(XFS_DFORK_DPTR(dip),
+			       &ip->i_df.if_u2.if_uuid,
+			       sizeof(uuid_t));
 		}
 		break;
 
@@ -3295,11 +3294,11 @@ xfs_iflush_int(
 	 */
 	xfs_synchronize_atime(ip);
 
-	if (XFS_TEST_ERROR(be16_to_cpu(dip->di_core.di_magic) != XFS_DINODE_MAGIC,
+	if (XFS_TEST_ERROR(be16_to_cpu(dip->di_magic) != XFS_DINODE_MAGIC,
 			       mp, XFS_ERRTAG_IFLUSH_1, XFS_RANDOM_IFLUSH_1)) {
 		xfs_cmn_err(XFS_PTAG_IFLUSH, CE_ALERT, mp,
 		    "xfs_iflush: Bad inode %Lu magic number 0x%x, ptr 0x%p",
-			ip->i_ino, be16_to_cpu(dip->di_core.di_magic), dip);
+			ip->i_ino, be16_to_cpu(dip->di_magic), dip);
 		goto corrupt_out;
 	}
 	if (XFS_TEST_ERROR(ip->i_d.di_magic != XFS_DINODE_MAGIC,
@@ -3362,7 +3361,7 @@ xfs_iflush_int(
 	 * because if the inode is dirty at all the core must
 	 * be.
 	 */
-	xfs_dinode_to_disk(&dip->di_core, &ip->i_d);
+	xfs_dinode_to_disk(dip, &ip->i_d);
 
 	/* Wrap, we never let the log put out DI_MAX_FLUSH */
 	if (ip->i_d.di_flushiter == DI_MAX_FLUSH)
@@ -3382,7 +3381,7 @@ xfs_iflush_int(
 			 * Convert it back.
 			 */
 			ASSERT(ip->i_d.di_nlink <= XFS_MAXLINK_1);
-			dip->di_core.di_onlink = cpu_to_be16(ip->i_d.di_nlink);
+			dip->di_onlink = cpu_to_be16(ip->i_d.di_nlink);
 		} else {
 			/*
 			 * The superblock version has already been bumped,
@@ -3390,12 +3389,12 @@ xfs_iflush_int(
 			 * format permanent.
 			 */
 			ip->i_d.di_version = XFS_DINODE_VERSION_2;
-			dip->di_core.di_version =  XFS_DINODE_VERSION_2;
+			dip->di_version =  XFS_DINODE_VERSION_2;
 			ip->i_d.di_onlink = 0;
-			dip->di_core.di_onlink = 0;
+			dip->di_onlink = 0;
 			memset(&(ip->i_d.di_pad[0]), 0, sizeof(ip->i_d.di_pad));
-			memset(&(dip->di_core.di_pad[0]), 0,
-			      sizeof(dip->di_core.di_pad));
+			memset(&(dip->di_pad[0]), 0,
+			      sizeof(dip->di_pad));
 			ASSERT(ip->i_d.di_projid == 0);
 		}
 	}