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| author | Tyler Hicks <tyhicks@canonical.com> | 2011-11-21 17:31:29 -0600 |
|---|---|---|
| committer | Tyler Hicks <tyhicks@canonical.com> | 2011-11-23 15:40:09 -0600 |
| commit | 32001d6fe9ac6b0423e674a3093aa56740849f3b (patch) | |
| tree | 97517bbe44089da7d33a6cc715f835e2adc9ddea /fs/ecryptfs | |
| parent | b59db43ad4434519feb338eacb01d77eb50825c5 (diff) | |
| download | lwn-32001d6fe9ac6b0423e674a3093aa56740849f3b.tar.gz lwn-32001d6fe9ac6b0423e674a3093aa56740849f3b.zip | |
eCryptfs: Flush file in vma close
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>
Cc: stable@kernel.org [2.6.39+]
Diffstat (limited to 'fs/ecryptfs')
| -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 c6ac98cf9baa..d3f95f941c47 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, |