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| author | Tyler Hicks <tyhicks@canonical.com> | 2015-08-05 11:26:36 -0500 |
|---|---|---|
| committer | Tyler Hicks <tyhicks@canonical.com> | 2015-08-18 17:29:48 -0500 |
| commit | 5556e7e6d30e8e9b5ee51b0e5edd526ee80e5e36 (patch) | |
| tree | 58681123e05bcd96b246de427babcfa756acd27e | |
| parent | 4469942bbbe5ebf845e04971d8c74e9b6178f9fa (diff) | |
| download | linux-5556e7e6d30e8e9b5ee51b0e5edd526ee80e5e36.tar.gz linux-5556e7e6d30e8e9b5ee51b0e5edd526ee80e5e36.tar.bz2 linux-5556e7e6d30e8e9b5ee51b0e5edd526ee80e5e36.zip | |
eCryptfs: Invalidate dcache entries when lower i_nlink is zero
Consider eCryptfs dcache entries to be stale when the corresponding
lower inode's i_nlink count is zero. This solves a problem caused by the
lower inode being directly modified, without going through the eCryptfs
mount, leaving stale eCryptfs dentries cached and the eCryptfs inode's
i_nlink count not being cleared.
Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
Reported-by: Richard Weinberger <richard@nod.at>
Cc: stable@vger.kernel.org
| -rw-r--r-- | fs/ecryptfs/dentry.c | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/fs/ecryptfs/dentry.c b/fs/ecryptfs/dentry.c index 8db0b464483f..63cd2c147221 100644 --- a/fs/ecryptfs/dentry.c +++ b/fs/ecryptfs/dentry.c @@ -45,20 +45,20 @@ static int ecryptfs_d_revalidate(struct dentry *dentry, unsigned int flags) { struct dentry *lower_dentry = ecryptfs_dentry_to_lower(dentry); - int rc; - - if (!(lower_dentry->d_flags & DCACHE_OP_REVALIDATE)) - return 1; + int rc = 1; if (flags & LOOKUP_RCU) return -ECHILD; - rc = lower_dentry->d_op->d_revalidate(lower_dentry, flags); + if (lower_dentry->d_flags & DCACHE_OP_REVALIDATE) + rc = lower_dentry->d_op->d_revalidate(lower_dentry, flags); + if (d_really_is_positive(dentry)) { - struct inode *lower_inode = - ecryptfs_inode_to_lower(d_inode(dentry)); + struct inode *inode = d_inode(dentry); - fsstack_copy_attr_all(d_inode(dentry), lower_inode); + fsstack_copy_attr_all(inode, ecryptfs_inode_to_lower(inode)); + if (!inode->i_nlink) + return 0; } return rc; } |