ecryptfs: modify write path to encrypt page in writepage
Change the write path to encrypt the data only when the page is written to
disk in ecryptfs_writepage. Previously, ecryptfs encrypts the page in
ecryptfs_write_end which means that if there are multiple write requests to
the same page, ecryptfs ends up re-encrypting that page over and over again.
This patch minimizes the number of encryptions needed.
Signed-off-by: Thieu Le <thieule@chromium.org>
[tyhicks: Changed NULL .drop_inode sop pointer to generic_drop_inode]
Signed-off-by: Tyler Hicks <tyhicks@linux.vnet.ibm.com>
diff --git a/fs/ecryptfs/file.c b/fs/ecryptfs/file.c
index 7d1050e..cedc913 100644
--- a/fs/ecryptfs/file.c
+++ b/fs/ecryptfs/file.c
@@ -273,7 +273,14 @@
static int
ecryptfs_fsync(struct file *file, int datasync)
{
- return vfs_fsync(ecryptfs_file_to_lower(file), datasync);
+ int rc = 0;
+
+ rc = generic_file_fsync(file, datasync);
+ if (rc)
+ goto out;
+ rc = vfs_fsync(ecryptfs_file_to_lower(file), datasync);
+out:
+ return rc;
}
static int ecryptfs_fasync(int fd, struct file *file, int flag)