xfs: add support for large btree blocks

Add support for larger btree blocks that contains a CRC32C checksum,
a filesystem uuid and block number for detecting filesystem
consistency and out of place writes.

[dchinner@redhat.com] Also include an owner field to allow reverse
mappings to be implemented for improved repairability and a LSN
field to so that log recovery can easily determine the last
modification that made it to disk for each buffer.

[dchinner@redhat.com] Add buffer log format flags to indicate the
type of buffer to recovery so that we don't have to do blind magic
number tests to determine what the buffer is.

[dchinner@redhat.com] Modified to fit into the verifier structure.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Ben Myers <bpm@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>

1 files changed, 17 insertions, 16 deletions

diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index 4f201656d2d9..202ce37e66cb 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -786,6 +786,7 @@ xfs_iformat_btree(
 	xfs_dinode_t		*dip,
 	int			whichfork)
 {
+	struct xfs_mount	*mp = ip->i_mount;
 	xfs_bmdr_block_t	*dfp;
 	xfs_ifork_t		*ifp;
 	/* REFERENCED */
@@ -794,7 +795,7 @@ xfs_iformat_btree(
 
 	ifp = XFS_IFORK_PTR(ip, whichfork);
 	dfp = (xfs_bmdr_block_t *)XFS_DFORK_PTR(dip, whichfork);
-	size = XFS_BMAP_BROOT_SPACE(dfp);
+	size = XFS_BMAP_BROOT_SPACE(mp, dfp);
 	nrecs = be16_to_cpu(dfp->bb_numrecs);
 
 	/*
@@ -805,14 +806,14 @@ xfs_iformat_btree(
 	 * blocks.
 	 */
 	if (unlikely(XFS_IFORK_NEXTENTS(ip, whichfork) <=
-			XFS_IFORK_MAXEXT(ip, whichfork) ||
+					XFS_IFORK_MAXEXT(ip, whichfork) ||
 		     XFS_BMDR_SPACE_CALC(nrecs) >
-			XFS_DFORK_SIZE(dip, ip->i_mount, whichfork) ||
+					XFS_DFORK_SIZE(dip, mp, whichfork) ||
 		     XFS_IFORK_NEXTENTS(ip, whichfork) > ip->i_d.di_nblocks)) {
-		xfs_warn(ip->i_mount, "corrupt inode %Lu (btree).",
-			(unsigned long long) ip->i_ino);
+		xfs_warn(mp, "corrupt inode %Lu (btree).",
+					(unsigned long long) ip->i_ino);
 		XFS_CORRUPTION_ERROR("xfs_iformat_btree", XFS_ERRLEVEL_LOW,
-				 ip->i_mount, dip);
+					 mp, dip);
 		return XFS_ERROR(EFSCORRUPTED);
 	}
 
@@ -823,8 +824,7 @@ xfs_iformat_btree(
 	 * Copy and convert from the on-disk structure
 	 * to the in-memory structure.
 	 */
-	xfs_bmdr_to_bmbt(ip->i_mount, dfp,
-			 XFS_DFORK_SIZE(dip, ip->i_mount, whichfork),
+	xfs_bmdr_to_bmbt(ip, dfp, XFS_DFORK_SIZE(dip, ip->i_mount, whichfork),
 			 ifp->if_broot, size);
 	ifp->if_flags &= ~XFS_IFEXTENTS;
 	ifp->if_flags |= XFS_IFBROOT;
@@ -2037,7 +2037,7 @@ xfs_iroot_realloc(
 		 * allocate it now and get out.
 		 */
 		if (ifp->if_broot_bytes == 0) {
-			new_size = (size_t)XFS_BMAP_BROOT_SPACE_CALC(rec_diff);
+			new_size = XFS_BMAP_BROOT_SPACE_CALC(mp, rec_diff);
 			ifp->if_broot = kmem_alloc(new_size, KM_SLEEP | KM_NOFS);
 			ifp->if_broot_bytes = (int)new_size;
 			return;
@@ -2051,9 +2051,9 @@ xfs_iroot_realloc(
 		 */
 		cur_max = xfs_bmbt_maxrecs(mp, ifp->if_broot_bytes, 0);
 		new_max = cur_max + rec_diff;
-		new_size = (size_t)XFS_BMAP_BROOT_SPACE_CALC(new_max);
+		new_size = XFS_BMAP_BROOT_SPACE_CALC(mp, new_max);
 		ifp->if_broot = kmem_realloc(ifp->if_broot, new_size,
-				(size_t)XFS_BMAP_BROOT_SPACE_CALC(cur_max), /* old size */
+				XFS_BMAP_BROOT_SPACE_CALC(mp, cur_max),
 				KM_SLEEP | KM_NOFS);
 		op = (char *)XFS_BMAP_BROOT_PTR_ADDR(mp, ifp->if_broot, 1,
 						     ifp->if_broot_bytes);
@@ -2061,7 +2061,7 @@ xfs_iroot_realloc(
 						     (int)new_size);
 		ifp->if_broot_bytes = (int)new_size;
 		ASSERT(ifp->if_broot_bytes <=
-			XFS_IFORK_SIZE(ip, whichfork) + XFS_BROOT_SIZE_ADJ);
+			XFS_IFORK_SIZE(ip, whichfork) + XFS_BROOT_SIZE_ADJ(ip));
 		memmove(np, op, cur_max * (uint)sizeof(xfs_dfsbno_t));
 		return;
 	}
@@ -2076,7 +2076,7 @@ xfs_iroot_realloc(
 	new_max = cur_max + rec_diff;
 	ASSERT(new_max >= 0);
 	if (new_max > 0)
-		new_size = (size_t)XFS_BMAP_BROOT_SPACE_CALC(new_max);
+		new_size = XFS_BMAP_BROOT_SPACE_CALC(mp, new_max);
 	else
 		new_size = 0;
 	if (new_size > 0) {
@@ -2084,7 +2084,8 @@ xfs_iroot_realloc(
 		/*
 		 * First copy over the btree block header.
 		 */
-		memcpy(new_broot, ifp->if_broot, XFS_BTREE_LBLOCK_LEN);
+		memcpy(new_broot, ifp->if_broot,
+			XFS_BMBT_BLOCK_LEN(ip->i_mount));
 	} else {
 		new_broot = NULL;
 		ifp->if_flags &= ~XFS_IFBROOT;
@@ -2114,7 +2115,7 @@ xfs_iroot_realloc(
 	ifp->if_broot = new_broot;
 	ifp->if_broot_bytes = (int)new_size;
 	ASSERT(ifp->if_broot_bytes <=
-		XFS_IFORK_SIZE(ip, whichfork) + XFS_BROOT_SIZE_ADJ);
+		XFS_IFORK_SIZE(ip, whichfork) + XFS_BROOT_SIZE_ADJ(ip));
 	return;
 }
 
@@ -2427,7 +2428,7 @@ xfs_iflush_fork(
 			ASSERT(ifp->if_broot != NULL);
 			ASSERT(ifp->if_broot_bytes <=
 			       (XFS_IFORK_SIZE(ip, whichfork) +
-				XFS_BROOT_SIZE_ADJ));
+				XFS_BROOT_SIZE_ADJ(ip)));
 			xfs_bmbt_to_bmdr(mp, ifp->if_broot, ifp->if_broot_bytes,
 				(xfs_bmdr_block_t *)cp,
 				XFS_DFORK_SIZE(dip, mp, whichfork));