On Thu, Oct 06, 2022 at 01:33:34AM -0700, Christoph Hellwig wrote: > On Tue, Oct 04, 2022 at 10:13:51AM -0700, Daeho Jeong wrote: > > From: Daeho Jeong <daehojeong@xxxxxxxxxx> > > > > introduce a new ioctl to replace the whole content of a file atomically, > > which means it induces truncate and content update at the same time. > > We can start it with F2FS_IOC_START_ATOMIC_REPLACE and complete it with > > F2FS_IOC_COMMIT_ATOMIC_WRITE. Or abort it with > > F2FS_IOC_ABORT_ATOMIC_WRITE. > > It would be great to Cc Darrick and linux-fsdevel as there have been > attempts to do this properly at the VFS level instead of a completely > undocumented ioctl. It's been a while since I sent the last RFC, but yes, it's still in my queue as part of the xfs online fsck patchserieses. https://lore.kernel.org/linux-fsdevel/161723932606.3149451.12366114306150243052.stgit@magnolia/ More recent git branch: https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux.git/log/?h=atomic-file-updates --D
