tree 3596eb0d334f04f87088c735748bba8e66a71cad
parent 1638045c36772b47a0765f7dca07cb90267e4942
author Darrick J. Wong <darrick.wong@oracle.com> 1566312916 -0700
committer Darrick J. Wong <darrick.wong@oracle.com> 1566312916 -0700

vfs: don't allow writes to swap files

Don't let userspace write to an active swap file because the kernel
effectively has a long term lease on the storage and things could get
seriously corrupted if we let this happen.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>