Tyler Hicks 6d65261a09 eCryptfs: don't pass fs-specific ioctl commands through ... eCryptfs can't be aware of what to expect when after passing an arbitrary ioctl command through to the lower filesystem. The ioctl command may trigger an action in the lower filesystem that is incompatible with eCryptfs. One specific example is when one attempts to use the Btrfs clone ioctl command when the source file is in the Btrfs filesystem that eCryptfs is mounted on top of and the destination fd is from a new file created in the eCryptfs mount. The ioctl syscall incorrectly returns success because the command is passed down to Btrfs which thinks that it was able to do the clone operation. However, the result is an empty eCryptfs file. This patch allows the trim, {g,s}etflags, and {g,s}etversion ioctl commands through and then copies up the inode metadata from the lower inode to the eCryptfs inode to catch any changes made to the lower inode's metadata. Those five ioctl commands are mostly common across all filesystems but the whitelist may need to be further pruned in the future. https://bugzilla.kernel.org/show_bug.cgi?id=93691 https://launchpad.net/bugs/1305335 Signed-off-by: Tyler Hicks <tyhicks@canonical.com> Cc: Rocko <rockorequin@hotmail.com> Cc: Colin Ian King <colin.king@canonical.com> Cc: stable@vger.kernel.org # v2.6.36+: c43f7b8 eCryptfs: Handle ioctl calls with unlocked and compat functions		2015-03-03 02:03:56 -06:00
..
crypto.c
debug.c
dentry.c
ecryptfs_kernel.h	eCryptfs: ensure copy to crypt_stat->cipher does not overrun	2015-02-24 19:23:28 -06:00
file.c	eCryptfs: don't pass fs-specific ioctl commands through	2015-03-03 02:03:56 -06:00
inode.c
Kconfig
keystore.c	eCryptfs: ensure copy to crypt_stat->cipher does not overrun	2015-02-24 19:23:28 -06:00
kthread.c
main.c	eCryptfs: ensure copy to crypt_stat->cipher does not overrun	2015-02-24 19:23:28 -06:00
Makefile
messaging.c
miscdev.c
mmap.c
read_write.c
super.c