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fuse: introduce fuse_simple_request() helper

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The following pattern is repeated many times:

	req = fuse_get_req_nopages(fc);
	/* Initialize req->(in|out).args */
	fuse_request_send(fc, req);
	err = req->out.h.error;
	fuse_put_request(req);

Create a new replacement helper:

	/* Initialize args */
	err = fuse_simple_request(fc, &args);

In addition to reducing the code size, this will ease moving from the
complex arg-based to a simpler page-based I/O on the fuse device.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
This commit is contained in:
Miklos Szeredi
2014-12-12 09:49:05 +01:00
parent f704dcb538
commit 7078187a79
5 changed files with 345 additions and 461 deletions
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29
fs/fuse/dev.c
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@@ -511,6 +511,35 @@ void fuse_request_send(struct fuse_conn *fc, struct fuse_req *req)
}
EXPORT_SYMBOL_GPL(fuse_request_send);
ssize_t fuse_simple_request(struct fuse_conn *fc, struct fuse_args *args)
{
struct fuse_req *req;
ssize_t ret;
req = fuse_get_req(fc, 0);
if (IS_ERR(req))
return PTR_ERR(req);
req->in.h.opcode = args->in.h.opcode;
req->in.h.nodeid = args->in.h.nodeid;
req->in.numargs = args->in.numargs;
memcpy(req->in.args, args->in.args,
args->in.numargs * sizeof(struct fuse_in_arg));
req->out.argvar = args->out.argvar;
req->out.numargs = args->out.numargs;
memcpy(req->out.args, args->out.args,
args->out.numargs * sizeof(struct fuse_arg));
fuse_request_send(fc, req);
ret = req->out.h.error;
if (!ret && args->out.argvar) {
BUG_ON(args->out.numargs != 1);
ret = req->out.args[0].size;
}
fuse_put_request(fc, req);
return ret;
}
static void fuse_request_send_nowait_locked(struct fuse_conn *fc,
struct fuse_req *req)
{