diff options
| author | Tyler Hicks <tyhicks@canonical.com> | 2012-09-12 18:02:46 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-10-21 09:28:01 -0700 |
| commit | e7ba1a13e4c4d315d94afb45e6dfaa7c543d9ba2 (patch) | |
| tree | c41ea530fda66b932081eafbc37cfe7f45ff004a | |
| parent | 068478a54bcd742e34b80f316472f3b06cacd8c6 (diff) | |
eCryptfs: Write out all dirty pages just before releasing the lower file
commit 7149f2558d5b5b988726662fe58b1c388337805b upstream.
Fixes a regression caused by:
821f749 eCryptfs: Revert to a writethrough cache model
That patch reverted some code (specifically, 32001d6f) that was
necessary to properly handle open() -> mmap() -> close() -> dirty pages
-> munmap(), because the lower file could be closed before the dirty
pages are written out.
Rather than reapplying 32001d6f, this approach is a better way of
ensuring that the lower file is still open in order to handle writing
out the dirty pages. It is called from ecryptfs_release(), while we have
a lock on the lower file pointer, just before the lower file gets the
final fput() and we overwrite the pointer.
https://launchpad.net/bugs/1047261
Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
Reported-by: Artemy Tregubenko <me@arty.name>
Tested-by: Artemy Tregubenko <me@arty.name>
Tested-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | fs/ecryptfs/main.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/ecryptfs/main.c b/fs/ecryptfs/main.c index 68954937a07..0f04d2eb9a6 100644 --- a/fs/ecryptfs/main.c +++ b/fs/ecryptfs/main.c @@ -162,6 +162,7 @@ void ecryptfs_put_lower_file(struct inode *inode) inode_info = ecryptfs_inode_to_private(inode); if (atomic_dec_and_mutex_lock(&inode_info->lower_file_count, &inode_info->lower_file_mutex)) { + filemap_write_and_wait(inode->i_mapping); fput(inode_info->lower_file); inode_info->lower_file = NULL; mutex_unlock(&inode_info->lower_file_mutex); |