linux-kernel - [02/20] ecryptfs: Improve metadata read failure logging

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Message-Id: <20120201201531.271638282@clark.kroah.org>
Date:	Wed, 01 Feb 2012 12:14:04 -0800
From:	Greg KH <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk, Tim Gardner <tim.gardner@...onical.com>,
	Kees Cook <keescook@...omium.org>,
	Tyler Hicks <tyhicks@...onical.com>
Subject: [02/20] ecryptfs: Improve metadata read failure logging

2.6.32-longterm review patch.  If anyone has any objections, please let me know.

------------------

From: Tim Gardner <tim.gardner@...onical.com>

commit 30373dc0c87ffef68d5628e77d56ffb1fa22e1ee upstream.

Print inode on metadata read failure. The only real
way of dealing with metadata read failures is to delete
the underlying file system file. Having the inode
allows one to 'find . -inum INODE`.

[tyhicks@...onical.com: Removed some minor not-for-stable parts]
Signed-off-by: Tim Gardner <tim.gardner@...onical.com>
Reviewed-by: Kees Cook <keescook@...omium.org>
Signed-off-by: Tyler Hicks <tyhicks@...onical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 fs/ecryptfs/crypto.c |    9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

--- a/fs/ecryptfs/crypto.c
+++ b/fs/ecryptfs/crypto.c
@@ -1609,7 +1609,8 @@ int ecryptfs_read_metadata(struct dentry
 		rc = ecryptfs_read_xattr_region(page_virt, ecryptfs_inode);
 		if (rc) {
 			printk(KERN_DEBUG "Valid eCryptfs headers not found in "
-			       "file header region or xattr region\n");
+			       "file header region or xattr region, inode %lu\n",
+				ecryptfs_inode->i_ino);
 			rc = -EINVAL;
 			goto out;
 		}
@@ -1618,7 +1619,8 @@ int ecryptfs_read_metadata(struct dentry
 						ECRYPTFS_DONT_VALIDATE_HEADER_SIZE);
 		if (rc) {
 			printk(KERN_DEBUG "Valid eCryptfs headers not found in "
-			       "file xattr region either\n");
+			       "file xattr region either, inode %lu\n",
+				ecryptfs_inode->i_ino);
 			rc = -EINVAL;
 		}
 		if (crypt_stat->mount_crypt_stat->flags
@@ -1629,7 +1631,8 @@ int ecryptfs_read_metadata(struct dentry
 			       "crypto metadata only in the extended attribute "
 			       "region, but eCryptfs was mounted without "
 			       "xattr support enabled. eCryptfs will not treat "
-			       "this like an encrypted file.\n");
+			       "this like an encrypted file, inode %lu\n",
+				ecryptfs_inode->i_ino);
 			rc = -EINVAL;
 		}
 	}


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