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authorDave Chinner <dchinner@redhat.com>2019-06-05 18:04:47 +0300
committerDarrick J. Wong <darrick.wong@oracle.com>2019-06-09 20:06:19 +0300
commit64bf5ff58dff757253cf2142542672de4b21cd1a (patch)
tree45cacb386c21b2778cc9a0562e5ee3aa0b2924be /fs/fuse/file.c
parentf16acc9d9b3761ae5e45219c9302f99e20919829 (diff)
downloadlinux-64bf5ff58dff757253cf2142542672de4b21cd1a.tar.xz
vfs: no fallback for ->copy_file_range
Now that we have generic_copy_file_range(), remove it as a fallback case when offloads fail. This puts the responsibility for executing fallbacks on the filesystems that implement ->copy_file_range and allows us to add operational validity checks to generic_copy_file_range(). Rework vfs_copy_file_range() to call a new do_copy_file_range() helper to execute the copying callout, and move calls to generic_file_copy_range() into filesystem methods where they currently return failures. [Amir] overlayfs is not responsible of executing the fallback. It is the responsibility of the underlying filesystem. Signed-off-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Amir Goldstein <amir73il@gmail.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Diffstat (limited to 'fs/fuse/file.c')
-rw-r--r--fs/fuse/file.c21
1 files changed, 18 insertions, 3 deletions
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index b8f9c83835d5..4c20bf61d9c3 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -3112,9 +3112,9 @@ out:
return err;
}
-static ssize_t fuse_copy_file_range(struct file *file_in, loff_t pos_in,
- struct file *file_out, loff_t pos_out,
- size_t len, unsigned int flags)
+static ssize_t __fuse_copy_file_range(struct file *file_in, loff_t pos_in,
+ struct file *file_out, loff_t pos_out,
+ size_t len, unsigned int flags)
{
struct fuse_file *ff_in = file_in->private_data;
struct fuse_file *ff_out = file_out->private_data;
@@ -3194,6 +3194,21 @@ out:
return err;
}
+static ssize_t fuse_copy_file_range(struct file *src_file, loff_t src_off,
+ struct file *dst_file, loff_t dst_off,
+ size_t len, unsigned int flags)
+{
+ ssize_t ret;
+
+ ret = __fuse_copy_file_range(src_file, src_off, dst_file, dst_off,
+ len, flags);
+
+ if (ret == -EOPNOTSUPP)
+ ret = generic_copy_file_range(src_file, src_off, dst_file,
+ dst_off, len, flags);
+ return ret;
+}
+
static const struct file_operations fuse_file_operations = {
.llseek = fuse_file_llseek,
.read_iter = fuse_file_read_iter,