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backing-file: convert to using fops->splice_write

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Filesystems may define their own splice write. Therefore, use the file
fops instead of invoking iter_file_splice_write() directly.

Signed-off-by: Ed Tsai <ed.tsai@mediatek.com>
Link: https://lore.kernel.org/r/20240708072208.25244-1-ed.tsai@mediatek.com
Fixes: 5ca7346861 ("fuse: implement splice read/write passthrough")
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Ed Tsai 2024-07-08 15:22:06 +08:00 committed by Christian Brauner
parent 232590ea7f
commit 996b37da1e
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1 changed files with 4 additions and 1 deletions
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5
fs/backing-file.c
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@ -303,13 +303,16 @@ ssize_t backing_file_splice_write(struct pipe_inode_info *pipe,
if (WARN_ON_ONCE(!(out->f_mode & FMODE_BACKING)))
return -EIO;
if (!out->f_op->splice_write)
return -EINVAL;
ret = file_remove_privs(ctx->user_file);
if (ret)
return ret;
old_cred = override_creds(ctx->cred);
file_start_write(out);
ret = iter_file_splice_write(pipe, out, ppos, len, flags);
ret = out->f_op->splice_write(pipe, out, ppos, len, flags);
file_end_write(out);
revert_creds(old_cred);