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authorDavid Howells <dhowells@redhat.com>2021-06-17 13:09:21 +0100
committerDavid Howells <dhowells@redhat.com>2023-12-28 09:45:22 +0000
commitc38f4e96e605f17990e871214e6ea1496bc4e65f (patch)
treeef067dcae6e6748d547e3ef66615ca7554fee474 /fs/netfs/internal.h
parent0e0f2dfe880fb19e4b15a7ca468623eb0b4ba586 (diff)
netfs: Provide func to copy data to pagecache for buffered write
Provide a netfs write helper, netfs_perform_write() to buffer data to be written in the pagecache and mark the modified folios dirty. It will perform "streaming writes" for folios that aren't currently resident, if possible, storing data in partially modified folios that are marked dirty, but not uptodate. It will also tag pages as belonging to fs-specific write groups if so directed by the filesystem. This is derived from generic_perform_write(), but doesn't use ->write_begin() and ->write_end(), having that logic rolled in instead. Signed-off-by: David Howells <dhowells@redhat.com> cc: 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.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/netfs/internal.h b/fs/netfs/internal.h
index 0f20587f5a9b..17e4ea4456c7 100644
--- a/fs/netfs/internal.h
+++ b/fs/netfs/internal.h
@@ -23,6 +23,8 @@
* buffered_read.c
*/
void netfs_rreq_unlock_folios(struct netfs_io_request *rreq);
+int netfs_prefetch_for_write(struct file *file, struct folio *folio,
+ size_t offset, size_t len);
/*
* io.c