[PATCH 09/12] xfs: refactor xfs_inode_verify_forks

[Christoph Hellwig <hch@xxxxxx>]

The split between xfs_inode_verify_forks and the two helpers
implementing the actual functionality is a little strange.  Reshuffle
it so that xfs_inode_verify_forks verifies if the data and attr forks
are actually in local format and only call the low-level helpers if
that is the case.  Handle the actual error reporting in the low-level
handlers to streamline the caller.

Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
 fs/xfs/libxfs/xfs_inode_fork.c | 47 ++++++++++++++++++++++------------
 fs/xfs/libxfs/xfs_inode_fork.h |  4 +--
 fs/xfs/xfs_inode.c             | 21 +++------------
 3 files changed, 37 insertions(+), 35 deletions(-)

diff --git a/fs/xfs/libxfs/xfs_inode_fork.c b/fs/xfs/libxfs/xfs_inode_fork.c
index f6dcee919f59e..7e129ed2f345f 100644
--- a/fs/xfs/libxfs/xfs_inode_fork.c
+++ b/fs/xfs/libxfs/xfs_inode_fork.c
@@ -674,34 +674,49 @@ xfs_ifork_init_cow(
 }
 
 /* Verify the inline contents of the data fork of an inode. */
-xfs_failaddr_t
-xfs_ifork_verify_data(
+int
+xfs_ifork_verify_local_data(
 	struct xfs_inode	*ip)
 {
-	/* Non-local data fork, we're done. */
-	if (ip->i_d.di_format != XFS_DINODE_FMT_LOCAL)
-		return NULL;
+	xfs_failaddr_t		fa = NULL;
 
-	/* Check the inline data fork if there is one. */
 	switch (VFS_I(ip)->i_mode & S_IFMT) {
 	case S_IFDIR:
-		return xfs_dir2_sf_verify(ip);
+		fa = xfs_dir2_sf_verify(ip);
+		break;
 	case S_IFLNK:
-		return xfs_symlink_shortform_verify(ip);
+		fa = xfs_symlink_shortform_verify(ip);
+		break;
 	default:
-		return NULL;
+		break;
 	}
+
+	if (fa) {
+		xfs_inode_verifier_error(ip, -EFSCORRUPTED, "data fork",
+			ip->i_df.if_u1.if_data, ip->i_df.if_bytes, fa);
+		return -EFSCORRUPTED;
+	}
+
+	return 0;
 }
 
 /* Verify the inline contents of the attr fork of an inode. */
-xfs_failaddr_t
-xfs_ifork_verify_attr(
+int
+xfs_ifork_verify_local_attr(
 	struct xfs_inode	*ip)
 {
-	/* There has to be an attr fork allocated if aformat is local. */
-	if (ip->i_d.di_aformat != XFS_DINODE_FMT_LOCAL)
-		return NULL;
+	xfs_failaddr_t		fa;
+
 	if (!XFS_IFORK_PTR(ip, XFS_ATTR_FORK))
-		return __this_address;
-	return xfs_attr_shortform_verify(ip);
+		fa = __this_address;
+	else
+		fa = xfs_attr_shortform_verify(ip);
+
+	if (fa) {
+		xfs_inode_verifier_error(ip, -EFSCORRUPTED, "attr fork",
+			ip->i_afp->if_u1.if_data, ip->i_afp->if_bytes, fa);
+		return -EFSCORRUPTED;
+	}
+
+	return 0;
 }
diff --git a/fs/xfs/libxfs/xfs_inode_fork.h b/fs/xfs/libxfs/xfs_inode_fork.h
index 3f84d33abd3b7..f46a8c1db5964 100644
--- a/fs/xfs/libxfs/xfs_inode_fork.h
+++ b/fs/xfs/libxfs/xfs_inode_fork.h
@@ -176,7 +176,7 @@ extern struct kmem_zone	*xfs_ifork_zone;
 
 extern void xfs_ifork_init_cow(struct xfs_inode *ip);
 
-xfs_failaddr_t xfs_ifork_verify_data(struct xfs_inode *ip);
-xfs_failaddr_t xfs_ifork_verify_attr(struct xfs_inode *ip);
+int xfs_ifork_verify_local_data(struct xfs_inode *ip);
+int xfs_ifork_verify_local_attr(struct xfs_inode *ip);
 
 #endif	/* __XFS_INODE_FORK_H__ */
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index 93967278355de..2ec7789317133 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -3766,25 +3766,12 @@ bool
 xfs_inode_verify_forks(
 	struct xfs_inode	*ip)
 {
-	struct xfs_ifork	*ifp;
-	xfs_failaddr_t		fa;
-
-	fa = xfs_ifork_verify_data(ip);
-	if (fa) {
-		ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
-		xfs_inode_verifier_error(ip, -EFSCORRUPTED, "data fork",
-				ifp->if_u1.if_data, ifp->if_bytes, fa);
+	if (ip->i_d.di_format == XFS_DINODE_FMT_LOCAL &&
+	    xfs_ifork_verify_local_data(ip))
 		return false;
-	}
-
-	fa = xfs_ifork_verify_attr(ip);
-	if (fa) {
-		ifp = XFS_IFORK_PTR(ip, XFS_ATTR_FORK);
-		xfs_inode_verifier_error(ip, -EFSCORRUPTED, "attr fork",
-				ifp ? ifp->if_u1.if_data : NULL,
-				ifp ? ifp->if_bytes : 0, fa);
+	if (ip->i_d.di_aformat == XFS_DINODE_FMT_LOCAL &&
+	    xfs_ifork_verify_local_attr(ip))
 		return false;
-	}
 	return true;
 }
 
-- 
2.26.2