diff options
| author | Tyler Hicks <tyhicks@canonical.com> | 2011-11-21 17:31:29 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-12-09 08:54:04 -0800 |
| commit | 19c8acbc4a4d444d72d256a7541b040cebddc78b (patch) | |
| tree | 2222ef02c49bfe41dcbb59b88c31120a23d38f92 | |
| parent | d1d274cd1ce2eb979c66233a36a7a92abfc0f18f (diff) | |
eCryptfs: Flush file in vma close
commit 32001d6fe9ac6b0423e674a3093aa56740849f3b upstream.
Dirty pages weren't being written back when an mmap'ed eCryptfs file was
closed before the mapping was unmapped. Since f_ops->flush() is not
called by the munmap() path, the lower file was simply being released.
This patch flushes the eCryptfs file in the vm_ops->close() path.
https://launchpad.net/bugs/870326
Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | fs/ecryptfs/file.c | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/fs/ecryptfs/file.c b/fs/ecryptfs/file.c index c6ac98cf9ba..d3f95f941c4 100644 --- a/fs/ecryptfs/file.c +++ b/fs/ecryptfs/file.c @@ -139,6 +139,27 @@ out: return rc; } +static void ecryptfs_vma_close(struct vm_area_struct *vma) +{ + filemap_write_and_wait(vma->vm_file->f_mapping); +} + +static const struct vm_operations_struct ecryptfs_file_vm_ops = { + .close = ecryptfs_vma_close, + .fault = filemap_fault, +}; + +static int ecryptfs_file_mmap(struct file *file, struct vm_area_struct *vma) +{ + int rc; + + rc = generic_file_mmap(file, vma); + if (!rc) + vma->vm_ops = &ecryptfs_file_vm_ops; + + return rc; +} + struct kmem_cache *ecryptfs_file_info_cache; /** @@ -349,7 +370,7 @@ const struct file_operations ecryptfs_main_fops = { #ifdef CONFIG_COMPAT .compat_ioctl = ecryptfs_compat_ioctl, #endif - .mmap = generic_file_mmap, + .mmap = ecryptfs_file_mmap, .open = ecryptfs_open, .flush = ecryptfs_flush, .release = ecryptfs_release, |