Re: [PATCH v4 00/39] netfs, afs, 9p: Delegate high-level I/O to netfslib

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On Wed, 13 Dec 2023 15:23:10 +0000, David Howells wrote:
> I have been working on my netfslib helpers to the point that I can run
> xfstests on AFS to completion (both with write-back buffering and, with a
> small patch, write-through buffering in the pagecache).  I have a patch for
> 9P, but am currently unable to test it.
> The patches remove a little over 800 lines from AFS, 300 from 9P, albeit with
> around 3000 lines added to netfs.  Hopefully, I will be able to remove a bunch
> of lines from Ceph too.
> [...]

Ok, that's on vfs.netfs for now. It's based on as that has splice
changes that would cause needless conflicts. It helps to not have such
series based on -next.

Fwiw, I'd rather have this based on a mainline tag in the future. Linus
has stated loads of times that he doesn't mind handling merge conflicts
and for me it's a lot easier if I have a stable mainline tag. linux-next
is too volatile. Thanks!


Applied to the vfs.netfs branch of the vfs/vfs.git tree.
Patches in the vfs.netfs branch should appear in linux-next soon.

Please report any outstanding bugs that were missed during review in a
new review to the original patch series allowing us to drop it.

It's encouraged to provide Acked-bys and Reviewed-bys even though the
patch has now been applied. If possible patch trailers will be updated.

Note that commit hashes shown below are subject to change due to rebase,
trailer updates or similar. If in doubt, please check the listed branch.

branch: vfs.netfs

[01/39] netfs, fscache: Move fs/fscache/* into fs/netfs/
[02/39] netfs, fscache: Combine fscache with netfs
[03/39] netfs, fscache: Remove ->begin_cache_operation
[04/39] netfs, fscache: Move /proc/fs/fscache to /proc/fs/netfs and put in a symlink
[05/39] netfs: Move pinning-for-writeback from fscache to netfs
[06/39] netfs: Add a procfile to list in-progress requests
[07/39] netfs: Allow the netfs to make the io (sub)request alloc larger
[08/39] netfs: Add a ->free_subrequest() op
[09/39] afs: Don't use folio->private to record partial modification
[10/39] netfs: Provide invalidate_folio and release_folio calls
[11/39] netfs: Implement unbuffered/DIO vs buffered I/O locking
[12/39] netfs: Add iov_iters to (sub)requests to describe various buffers
[13/39] netfs: Add support for DIO buffering
[14/39] netfs: Provide tools to create a buffer in an xarray
[15/39] netfs: Add bounce buffering support
[16/39] netfs: Add func to calculate pagecount/size-limited span of an iterator
[17/39] netfs: Limit subrequest by size or number of segments
[18/39] netfs: Export netfs_put_subrequest() and some tracepoints
[19/39] netfs: Extend the netfs_io_*request structs to handle writes
[20/39] netfs: Add a hook to allow tell the netfs to update its i_size
[21/39] netfs: Make netfs_put_request() handle a NULL pointer
[22/39] netfs: Make the refcounting of netfs_begin_read() easier to use
[23/39] netfs: Prep to use folio->private for write grouping and streaming write
[24/39] netfs: Dispatch write requests to process a writeback slice
[25/39] netfs: Provide func to copy data to pagecache for buffered write
[26/39] netfs: Make netfs_read_folio() handle streaming-write pages
[27/39] netfs: Allocate multipage folios in the writepath
[28/39] netfs: Implement support for unbuffered/DIO read
[29/39] netfs: Implement unbuffered/DIO write support
[30/39] netfs: Implement buffered write API
[31/39] netfs: Allow buffered shared-writeable mmap through netfs_page_mkwrite()
[32/39] netfs: Provide netfs_file_read_iter()
[33/39] netfs, cachefiles: Pass upper bound length to allow expansion
[34/39] netfs: Provide a writepages implementation
[35/39] netfs: Provide a launder_folio implementation
[36/39] netfs: Implement a write-through caching option
[37/39] netfs: Optimise away reads above the point at which there can be no data
[38/39] afs: Use the netfs write helpers
[39/39] 9p: Use netfslib read/write_iter

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