On Thu, Nov 24, 2016 at 11:55 AM, Miklos Szeredi <mszeredi@xxxxxxxxxx> wrote: > A file is opened for read-only, opened read-write (resulting in a copy up) > and modified. The data read back from the the read-only fd will be stale > in this case (the read-only file descriptor still refers to the lower, > unmodified file). > > This patchset fixes issues related to this corner case. > > The VFS impact is minimal and performance in the non-corner cases shouldn't > suffer. Git tree is here: git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs.git #overlayfs-rorw Thanks, Miklos > --- > Miklos Szeredi (7): > vfs: allow overlayfs to intercept file ops > vfs: export filp_clone_open() > mm: ovl: copy-up on MAP_SHARED > ovl: add infrastructure for intercepting file ops > ovl: intercept read_iter > ovl: intercept mmap > ovl: intercept fsync > > fs/internal.h | 1 - > fs/open.c | 2 +- > fs/overlayfs/inode.c | 225 +++++++++++++++++++++++++++++++++++++++++++++++ > fs/overlayfs/overlayfs.h | 2 + > fs/overlayfs/super.c | 1 + > include/linux/fs.h | 1 + > mm/util.c | 22 +++++ > 7 files changed, 252 insertions(+), 2 deletions(-) > > -- > 2.5.5 > -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
