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| author | Dave Chinner | 2019-06-05 17:04:47 +0200 |
|---|---|---|
| committer | Darrick J. Wong | 2019-06-09 19:06:19 +0200 |
| commit | 64bf5ff58dff757253cf2142542672de4b21cd1a (patch) | |
| tree | 45cacb386c21b2778cc9a0562e5ee3aa0b2924be /fs/fuse | |
| parent | vfs: introduce generic_copy_file_range() (diff) | |
| download | kernel-qcow2-linux-64bf5ff58dff757253cf2142542672de4b21cd1a.tar.gz kernel-qcow2-linux-64bf5ff58dff757253cf2142542672de4b21cd1a.tar.xz kernel-qcow2-linux-64bf5ff58dff757253cf2142542672de4b21cd1a.zip | |
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')
| -rw-r--r-- | fs/fuse/file.c | 21 |
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, |