diff options
author | David Howells <dhowells@redhat.com> | 2022-02-21 14:38:17 +0300 |
---|---|---|
committer | David Howells <dhowells@redhat.com> | 2023-12-28 12:45:24 +0300 |
commit | 153a9961b551101cd38e94e26cd92fbfd198b19b (patch) | |
tree | 4d45c248dbdaf8ded00848164de353f239f8bac9 /fs/netfs/internal.h | |
parent | 016dc8516aec8719641e7aaaacd78d344759178e (diff) | |
download | linux-153a9961b551101cd38e94e26cd92fbfd198b19b.tar.xz |
netfs: Implement unbuffered/DIO write support
Implement support for unbuffered writes and direct I/O writes. If the
write is misaligned with respect to the fscrypt block size, then RMW cycles
are performed if necessary. DIO writes are a special case of unbuffered
writes with extra restriction imposed, such as block size alignment
requirements.
Also provide a field that can tell the code to add some extra space onto
the bounce buffer for use by the filesystem in the case of a
content-encrypted file.
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
cc: linux-cachefs@redhat.com
cc: linux-fsdevel@vger.kernel.org
cc: linux-mm@kvack.org
Diffstat (limited to 'fs/netfs/internal.h')
-rw-r--r-- | fs/netfs/internal.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/netfs/internal.h b/fs/netfs/internal.h index 886c2e8f841f..2de4f826dbe4 100644 --- a/fs/netfs/internal.h +++ b/fs/netfs/internal.h @@ -27,6 +27,12 @@ int netfs_prefetch_for_write(struct file *file, struct folio *folio, size_t offset, size_t len); /* + * direct_write.c + */ +ssize_t netfs_unbuffered_write_iter_locked(struct kiocb *iocb, struct iov_iter *iter, + struct netfs_group *netfs_group); + +/* * io.c */ int netfs_begin_read(struct netfs_io_request *rreq, bool sync); |