From 7078187a795f862465325bcadf3070867c0cb5f8 Mon Sep 17 00:00:00 2001 From: Miklos Szeredi Date: Fri, 12 Dec 2014 09:49:05 +0100 Subject: fuse: introduce fuse_simple_request() helper 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 --- fs/fuse/fuse_i.h | 34 ++++++++++++++++++++++++---------- 1 file changed, 24 insertions(+), 10 deletions(-) (limited to 'fs/fuse/fuse_i.h') diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h index 351c098307b8..e0fc6725d1d0 100644 --- a/fs/fuse/fuse_i.h +++ b/fs/fuse/fuse_i.h @@ -222,6 +222,25 @@ struct fuse_page_desc { unsigned int offset; }; +struct fuse_args { + struct { + struct { + uint32_t opcode; + uint64_t nodeid; + } h; + unsigned numargs; + struct fuse_in_arg args[3]; + + } in; + struct { + unsigned argvar:1; + unsigned numargs; + struct fuse_arg args[2]; + } out; +}; + +#define FUSE_ARGS(args) struct fuse_args args = {} + /** The request state */ enum fuse_req_state { FUSE_REQ_INIT = 0, @@ -321,7 +340,6 @@ struct fuse_req { struct fuse_req *next; } write; struct fuse_notify_retrieve_in retrieve_in; - struct fuse_lk_in lk_in; } misc; /** page vector */ @@ -750,15 +768,6 @@ struct fuse_req *fuse_get_req_for_background(struct fuse_conn *fc, */ void __fuse_get_request(struct fuse_req *req); -/** - * Get a request, may fail with -ENOMEM, - * useful for callers who doesn't use req->pages[] - */ -static inline struct fuse_req *fuse_get_req_nopages(struct fuse_conn *fc) -{ - return fuse_get_req(fc, 0); -} - /** * Gets a requests for a file operation, always succeeds */ @@ -776,6 +785,11 @@ void fuse_put_request(struct fuse_conn *fc, struct fuse_req *req); */ void fuse_request_send(struct fuse_conn *fc, struct fuse_req *req); +/** + * Simple request sending that does request allocation and freeing + */ +ssize_t fuse_simple_request(struct fuse_conn *fc, struct fuse_args *args); + /** * Send a request in the background */ -- cgit v1.2.3-58-ga151