[RFC PATCH 03/53] netfs: Note nonblockingness in the netfs_io_request struct
From: David Howells <dhowells@redhat.com>
Date: 2023-10-13 15:57:53
Also in:
ceph-devel, linux-cifs, linux-fsdevel, linux-mm, linux-nfs, lkml, v9fs
Subsystem:
filesystems (vfs and infrastructure), filesystems [netfs library], the rest · Maintainers:
Alexander Viro, Christian Brauner, David Howells, Paulo Alcantara, Linus Torvalds
Allow O_NONBLOCK to be noted in the netfs_io_request struct. Also add a flag, NETFS_RREQ_BLOCKED to record if we did block. 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 --- fs/netfs/objects.c | 2 ++ include/linux/netfs.h | 2 ++ 2 files changed, 4 insertions(+)
diff --git a/fs/netfs/objects.c b/fs/netfs/objects.c
index 85f428fc52e6..e41f9fc9bdd2 100644
--- a/fs/netfs/objects.c
+++ b/fs/netfs/objects.c@@ -37,6 +37,8 @@ struct netfs_io_request *netfs_alloc_request(struct address_space *mapping, INIT_LIST_HEAD(&rreq->subrequests); refcount_set(&rreq->ref, 1); __set_bit(NETFS_RREQ_IN_PROGRESS, &rreq->flags); + if (file && file->f_flags & O_NONBLOCK) + __set_bit(NETFS_RREQ_NONBLOCK, &rreq->flags); if (rreq->netfs_ops->init_request) { ret = rreq->netfs_ops->init_request(rreq, file); if (ret < 0) {
diff --git a/include/linux/netfs.h b/include/linux/netfs.h
index 282511090ead..b92e982ac4a0 100644
--- a/include/linux/netfs.h
+++ b/include/linux/netfs.h@@ -205,6 +205,8 @@ struct netfs_io_request { #define NETFS_RREQ_DONT_UNLOCK_FOLIOS 3 /* Don't unlock the folios on completion */ #define NETFS_RREQ_FAILED 4 /* The request failed */ #define NETFS_RREQ_IN_PROGRESS 5 /* Unlocked when the request completes */ +#define NETFS_RREQ_NONBLOCK 6 /* Don't block if possible (O_NONBLOCK) */ +#define NETFS_RREQ_BLOCKED 7 /* We blocked */ const struct netfs_request_ops *netfs_ops; };