ecryptfs: remove unnecessary decrypt when extending a file
commit24562486be76cf223b8d911f45e1d26eb3364b13
authorFrank Swiderski <fes@chromium.org>
Mon, 15 Nov 2010 18:43:22 +0000 (15 10:43 -0800)
committerTyler Hicks <tyhicks@linux.vnet.ibm.com>
Mon, 17 Jan 2011 19:01:25 +0000 (17 13:01 -0600)
tree7ce33c533c12b4dc66d8afd836c7996d5769e325
parentf24b38874e1e37bb70291bbc4c5c3c13f5f9dac8
ecryptfs: remove unnecessary decrypt when extending a file

Removes an unecessary page decrypt from ecryptfs_begin_write when the
page is beyond the current file size. Previously, the call to
ecryptfs_decrypt_page would result in a read of 0 bytes, but still
attempt to decrypt an entire page. This patch detects that case and
merely zeros the page before marking it up-to-date.

Signed-off-by: Frank Swiderski <fes@chromium.org>
Signed-off-by: Tyler Hicks <tyhicks@linux.vnet.ibm.com>
fs/ecryptfs/mmap.c