From 7717980085bf7a047fe33ab113d53e65ea9e07b9 Mon Sep 17 00:00:00 2001 From: Vyacheslav Dubeyko Date: Wed, 20 Feb 2013 13:15:53 +1100 Subject: [PATCH] hfsplus: fix issue with unzeroed unused b-tree nodes MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit The fsck_hfs (under MacOS X) complains about unzeroed unused b-tree nodes after deletion of folders' tree under Linux. SYMPTOMS: Running Disk Utiltiy's "Verify Disk" on "test" gives the following: Verifying volume “Test” Checking file systemChecking Journaled HFS Plus volume. Checking extents overflow file. Checking catalog file. Unused node is not erased (node = 3111) Checking multi-linked files. Checking catalog hierarchy. Checking extended attributes file. Checking volume bitmap. Checking volume information. The volume Test was found corrupt and needs to be repaired. Error: This disk needs to be repaired. Click Repair Disk. REPRODUCING PATH: 1. Prepare HFS+ (non-case sensitive) partition (for example, 5GB) under MacOS X. 2. Copy linux kernel source tree (for example, 3.7-rc6 version) on this partition under MacOS X. 3. Then switch to Linux and mount this prepared partition. 4. Execute `sudo rm -r` under prepared directory with linux kernel source tree. 5. Unmount and boot back into OS X. 6. Open up Disk Utility and verify partition. REPRODUCIBILITY: 100% FIX: It is added code of node clearing in hfs_bnode_put() method for the case when node has flag HFS_BNODE_DELETED. Signed-off-by: Vyacheslav Dubeyko Reported-by: Kyle Laracey Acked-by: Hin-Tak Leung Cc: Al Viro Cc: Christoph Hellwig Cc: Jan Kara Signed-off-by: Andrew Morton --- fs/hfsplus/bnode.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/hfsplus/bnode.c b/fs/hfsplus/bnode.c index 5c125ce6bd72..f31ac6f404f1 100644 --- a/fs/hfsplus/bnode.c +++ b/fs/hfsplus/bnode.c @@ -648,6 +648,8 @@ void hfs_bnode_put(struct hfs_bnode *node) if (test_bit(HFS_BNODE_DELETED, &node->flags)) { hfs_bnode_unhash(node); spin_unlock(&tree->hash_lock); + hfs_bnode_clear(node, 0, + PAGE_CACHE_SIZE * tree->pages_per_bnode); hfs_bmap_free(node); hfs_bnode_free(node); return; -- 2.39.5