[PATCH v2 30/30] virtio-fs: Do not provide abort interface in fusectl

Vivek Goyal
2019-05-15T19:29:16Z

virtio-fs does not support aborting requests which are being processed. That
is requests which have been sent to fuse daemon on host.

So do not provide "abort" interface for virtio-fs in fusectl.

Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
---
fs/fuse/control.c | 4 ++--
fs/fuse/fuse_i.h | 4 ++++
fs/fuse/inode.c | 1 +
fs/fuse/virtio_fs.c | 1 +
4 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/fs/fuse/control.c b/fs/fuse/control.c
index fe80bea4ad89..c1423f2ebc5e 100644
--- a/fs/fuse/control.c
+++ b/fs/fuse/control.c
@@ -278,8 +278,8 @@ int fuse_ctl_add_conn(struct fuse_conn *fc)

if (!fuse_ctl_add_dentry(parent, fc, "waiting", S_IFREG | 0400, 1,
NULL, &fuse_ctl_waiting_ops) ||
- !fuse_ctl_add_dentry(parent, fc, "abort", S_IFREG | 0200, 1,
- NULL, &fuse_ctl_abort_ops) ||
+ (!fc->no_abort && !fuse_ctl_add_dentry(parent, fc, "abort",
+ S_IFREG | 0200, 1, NULL, &fuse_ctl_abort_ops)) ||
!fuse_ctl_add_dentry(parent, fc, "max_background", S_IFREG | 0600,
1, NULL, &fuse_conn_max_background_ops) ||
!fuse_ctl_add_dentry(parent, fc, "congestion_threshold",
diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index b4a5728444bb..7ac7f9a0b81b 100644
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -86,6 +86,7 @@ struct fuse_mount_data {
unsigned allow_other:1;
unsigned dax:1;
unsigned destroy:1;
+ unsigned no_abort:1;
unsigned max_read;
unsigned blksize;

@@ -847,6 +848,9 @@ struct fuse_conn {
/** Does the filesystem support copy_file_range? */
unsigned no_copy_file_range:1;

+ /** Do not create abort file in fuse control fs */
+ unsigned no_abort:1;
+
/** The number of requests waiting for completion */
atomic_t num_waiting;

diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index 8af7f31c6e19..302f7e04b645 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -1272,6 +1272,7 @@ int fuse_fill_super_common(struct super_block *sb,
fc->user_id = mount_data->user_id;
fc->group_id = mount_data->group_id;
fc->max_read = max_t(unsigned, 4096, mount_data->max_read);
+ fc->no_abort = mount_data->no_abort;

/* Used by get_root_inode() */
sb->s_fs_info = fc;
diff --git a/fs/fuse/virtio_fs.c b/fs/fuse/virtio_fs.c
index 76c46edcc8ac..18fc0dca0abc 100644
--- a/fs/fuse/virtio_fs.c
+++ b/fs/fuse/virtio_fs.c
@@ -1042,6 +1042,7 @@ static int virtio_fs_fill_super(struct super_block *sb, void *data,
d.fiq_priv = fs;
d.fudptr = (void **)&fs->vqs[VQ_REQUEST].fud;
d.destroy = true; /* Send destroy request on unmount */
+ d.no_abort = 1;
err = fuse_fill_super_common(sb, &d);
if (err < 0)
goto err_free_init_req;
--
2.20.1