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| author |   Michael Halcrow <mhalcrow@us.ibm.com> | 2008-01-08 15:33:02 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-01-08 16:10:36 -0800 |
| commit | caeeeecfdaeada2998eb3c29c3ebd59afb79ef06 (patch) | |
| tree | 22b7931ba119d10fb9c76bc54b500ce1d43d505c /fs/ecryptfs | |
| parent | xip: fix get_zeroed_page with __GFP_HIGHMEM (diff) | |
| download | linux-dev-caeeeecfdaeada2998eb3c29c3ebd59afb79ef06.tar.xz linux-dev-caeeeecfdaeada2998eb3c29c3ebd59afb79ef06.zip | |
eCryptfs: fix dentry handling on create error, unlink, and inode destroy
This patch corrects some erroneous dentry handling in eCryptfs.
If there is a problem creating the lower file, then there is nothing that
the persistent lower file can do to really help us. This patch makes a
vfs_create() failure in the lower filesystem always lead to an
unconditional do_create failure in eCryptfs.
Under certain sequences of operations, the eCryptfs dentry can remain in
the dcache after an unlink. This patch calls d_drop() on the eCryptfs
dentry to correct this.
eCryptfs has no business calling d_delete() directly on a lower
filesystem's dentry. This patch removes the call to d_delete() on the
lower persistent file's dentry in ecryptfs_destroy_inode().
(Thanks to David Kleikamp, Eric Sandeen, and Jeff Moyer for helping
identify and resolve this issue)
Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com>
Cc: Dave Kleikamp <shaggy@austin.ibm.com>
Cc: Eric Sandeen <sandeen@redhat.com>
Cc: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/ecryptfs')
| -rw-r--r-- | fs/ecryptfs/inode.c | 20 | ||||
| -rw-r--r-- | fs/ecryptfs/super.c | 1 |
2 files changed, 4 insertions, 17 deletions
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c index 0b1ab016fa2e..5a719180983c 100644 --- a/fs/ecryptfs/inode.c +++ b/fs/ecryptfs/inode.c @@ -120,22 +120,9 @@ ecryptfs_do_create(struct inode *directory_inode, rc = ecryptfs_create_underlying_file(lower_dir_dentry->d_inode, ecryptfs_dentry, mode, nd); if (rc) { - struct inode *ecryptfs_inode = ecryptfs_dentry->d_inode; - struct ecryptfs_inode_info *inode_info = - ecryptfs_inode_to_private(ecryptfs_inode); - - printk(KERN_WARNING "%s: Error creating underlying file; " - "rc = [%d]; checking for existing\n", __FUNCTION__, rc); - if (inode_info) { - mutex_lock(&inode_info->lower_file_mutex); - if (!inode_info->lower_file) { - mutex_unlock(&inode_info->lower_file_mutex); - printk(KERN_ERR "%s: Failure to set underlying " - "file; rc = [%d]\n", __FUNCTION__, rc); - goto out_lock; - } - mutex_unlock(&inode_info->lower_file_mutex); - } + printk(KERN_ERR "%s: Failure to create dentry in lower fs; " + "rc = [%d]\n", __FUNCTION__, rc); + goto out_lock; } rc = ecryptfs_interpose(lower_dentry, ecryptfs_dentry, directory_inode->i_sb, 0); @@ -451,6 +438,7 @@ static int ecryptfs_unlink(struct inode *dir, struct dentry *dentry) dentry->d_inode->i_nlink = ecryptfs_inode_to_lower(dentry->d_inode)->i_nlink; dentry->d_inode->i_ctime = dir->i_ctime; + d_drop(dentry); out_unlock: unlock_parent(lower_dentry); return rc; diff --git a/fs/ecryptfs/super.c b/fs/ecryptfs/super.c index f8cdab2bee3d..4859c4eecd65 100644 --- a/fs/ecryptfs/super.c +++ b/fs/ecryptfs/super.c @@ -86,7 +86,6 @@ static void ecryptfs_destroy_inode(struct inode *inode) fput(inode_info->lower_file); inode_info->lower_file = NULL; d_drop(lower_dentry); - d_delete(lower_dentry); } } mutex_unlock(&inode_info->lower_file_mutex); |