[PATCH 1/2] xfs_db: fix inode CRC validity state, and warn on read if invalid

[Eric Sandeen]

Currently, the "ino_crc_ok" field on the io cursor
reflects overall inode validity, not CRC correctness.
Because it is only used when printing CRC validity,
change it to reflect only that.

In addition, when reading an inode, print the current
CRC state.

Note, if specifying an inode which doesn't actually
exist, this will claim corruption; I'm not sure if
that's good or bad.  Today, it already issues corruption
errors on the way; this adds a new message as well ;)

xfs_db> inode 129
Metadata corruption detected at block 0x80/0x2000
Metadata corruption detected at block 0x80/0x2000
...
Metadata CRC error detected for ino 129

Signed-off-by: Eric Sandeen <sandeen at redhat.com>
---

diff --git a/db/inode.c b/db/inode.c
index 24170ba..244d03b 100644
--- a/db/inode.c
+++ b/db/inode.c
@@ -684,13 +684,18 @@ set_cur_inode(
  		numblks, DB_RING_IGN, NULL);
  	off_cur(offset << mp->m_sb.sb_inodelog, mp->m_sb.sb_inodesize);
  	dip = iocur_top->data;
-	iocur_top->ino_crc_ok = libxfs_dinode_verify(mp, ino, dip);
+	iocur_top->ino_crc_ok = xfs_verify_cksum((char *)dip,
+						 mp->m_sb.sb_inodesize,
+						 XFS_DINODE_CRC_OFF);
  	iocur_top->ino_buf = 1;
  	iocur_top->ino = ino;
  	iocur_top->mode = be16_to_cpu(dip->di_mode);
  	if ((iocur_top->mode & S_IFMT) == S_IFDIR)
  		iocur_top->dirino = ino;
  
+	if (xfs_sb_version_hascrc(&mp->m_sb) && !iocur_top->ino_crc_ok)
+		dbprintf(_("Metadata CRC error detected for ino %lld\n"), ino);
+
  	/* track updated info in ring */
  	ring_add();
  }
diff --git a/db/io.c b/db/io.c
index 7f1b76a..93ebf5c 100644
--- a/db/io.c
+++ b/db/io.c
@@ -473,6 +473,17 @@ write_cur(void)
  		write_cur_bbs();
  	else
  		write_cur_buf();
+
+	if (iocur_top->ino_buf) {
+		xfs_dinode_t    *dip;
+		xfs_ino_t       ino;
+
+		dip = iocur_top->data;
+		ino = iocur_top->ino;
+		iocur_top->ino_crc_ok = xfs_verify_cksum((char *)dip,
+						 mp->m_sb.sb_inodesize,
+						 XFS_DINODE_CRC_OFF);
+	}
  }
  
  void